blob: e991dc85f2fbb9abebc466efaec00d24d9b11d98 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#undef BLOCKMOVE
2#define Z_WAKE
3#undef Z_EXT_CHARS_IN_BUFFER
Linus Torvalds1da177e2005-04-16 15:20:36 -07004
5/*
6 * linux/drivers/char/cyclades.c
7 *
8 * This file contains the driver for the Cyclades async multiport
9 * serial boards.
10 *
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Jiri Slabyc8e16932007-05-08 00:37:05 -070014 * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 *
16 * Much of the design and some of the code came from serial.c
17 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
18 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
19 * and then fixed as suggested by Michael K. Johnson 12/12/92.
Jiri Slabyc8e16932007-05-08 00:37:05 -070020 * Converted to pci probing and cleaned up by Jiri Slaby.
Linus Torvalds1da177e2005-04-16 15:20:36 -070021 *
22 * This version supports shared IRQ's (only for PCI boards).
23 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 * Prevent users from opening non-existing Z ports.
25 *
26 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
27 * Fixed the PCI detection function to work properly on Alpha systems.
28 * Implemented support for TIOCSERGETLSR ioctl.
29 * Implemented full support for non-standard baud rates.
30 *
31 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
32 * Request PLX I/O region, although driver doesn't use it, to avoid
33 * problems with other drivers accessing it.
34 * Removed count for on-board buffer characters in cy_chars_in_buffer
35 * (Cyclades-Z only).
36 *
37 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
38 * Driver now reports physical instead of virtual memory addresses.
39 * Masks were added to some Cyclades-Z read accesses.
40 * Implemented workaround for PLX9050 bug that would cause a system lockup
41 * in certain systems, depending on the MMIO addresses allocated to the
42 * board.
43 * Changed the Tx interrupt programming in the CD1400 chips to boost up
44 * performance (Cyclom-Y only).
45 * Code is now compliant with the new module interface (module_[init|exit]).
46 * Make use of the PCI helper functions to access PCI resources.
47 * Did some code "housekeeping".
48 *
49 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
50 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
51 *
52 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
53 * Fixed SMP locking in Cyclom-Y interrupt handler.
54 *
55 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
56 * Added a new cyclades_card field called nports to allow the driver to
57 * know the exact number of ports found by the Z firmware after its load;
58 * RX buffer contention prevention logic on interrupt op mode revisited
59 * (Cyclades-Z only);
60 * Revisited printk's for Z debug;
61 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
62 *
63 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
Alan Cox15ed6cc2008-04-30 00:53:55 -070064 * Fixed bug in cyz_poll that would make all ports but port 0
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 * unable to transmit/receive data (Cyclades-Z only);
66 * Implemented logic to prevent the RX buffer from being stuck with data
67 * due to a driver / firmware race condition in interrupt op mode
68 * (Cyclades-Z only);
69 * Fixed bug in block_til_ready logic that would lead to a system crash;
70 * Revisited cy_close spinlock usage;
71 *
72 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
73 * Revisited CONFIG_PCI conditional compilation for PCI board support;
74 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
75 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
76 * Removed CTS handling from the driver -- this is now completely handled
77 * by the firmware (Cyclades-Z only);
78 * Flush RX on-board buffers on a port open (Cyclades-Z only);
79 * Fixed handling of ASYNC_SPD_* TTY flags;
80 * Module unload now unmaps all memory area allocated by ioremap;
81 *
82 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
83 * Removed CY_PROC conditional compilation;
84 * Implemented SMP-awareness for the driver;
Alan Cox15ed6cc2008-04-30 00:53:55 -070085 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 * functions;
87 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
88 * (irq=NN) as parameters (only for ISA boards);
Alan Cox15ed6cc2008-04-30 00:53:55 -070089 * Fixed bug in set_line_char that would prevent the Cyclades-Z
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 * ports from being configured at speeds above 115.2Kbps;
91 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
92 * switching from working properly;
Alan Cox15ed6cc2008-04-30 00:53:55 -070093 * The driver now only prints IRQ info for the Cyclades-Z if it's
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 * configured to work in interrupt mode;
95 *
96 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
97 * Added support for interrupt mode operation for the Z cards;
98 * Removed the driver inactivity control for the Z;
Alan Cox15ed6cc2008-04-30 00:53:55 -070099 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 * the Z firmware is not loaded yet;
Alan Cox15ed6cc2008-04-30 00:53:55 -0700101 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 * same functionality;
Alan Cox15ed6cc2008-04-30 00:53:55 -0700103 * Implemented workaround for IRQ setting loss on the PCI configuration
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
105 *
106 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
107 * /proc entry location changed to /proc/tty/driver/cyclades;
108 * Added support to shared IRQ's (only for PCI boards);
109 * Added support for Cobalt Qube2 systems;
110 * IRQ [de]allocation scheme revisited;
111 * BREAK implementation changed in order to make use of the 'break_ctl'
112 * TTY facility;
113 * Fixed typo in TTY structure field 'driver_name';
Alan Cox15ed6cc2008-04-30 00:53:55 -0700114 * Included a PCI bridge reset and EEPROM reload in the board
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 * initialization code (for both Y and Z series).
116 *
117 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
Alan Cox15ed6cc2008-04-30 00:53:55 -0700118 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 * closed properly after a SIGINT;
120 * Module usage counter scheme revisited;
121 * Added support to the upcoming Y PCI boards (i.e., support to additional
122 * PCI Device ID's).
Alan Cox15ed6cc2008-04-30 00:53:55 -0700123 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
125 * Removed all unnecessary page-alignement operations in ioremap calls
126 * (ioremap is currently safe for these operations).
127 *
128 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
Alan Cox15ed6cc2008-04-30 00:53:55 -0700129 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 * order to make PLX9050-based boards work with certain motherboards.
131 *
132 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
133 * cy_close function now resets (correctly) the tty->closing flag;
134 * JIFFIES_DIFF macro fixed.
135 *
136 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
137 * Fixed bug in cy_close function, which was not informing HW of
138 * which port should have the reception disabled before doing so;
139 * fixed Cyclom-8YoP hardware detection bug.
140 *
141 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
142 * Fixed bug in cy_close function, which causes malfunction
143 * of one of the first 4 ports when a higher port is closed
144 * (Cyclom-Y only).
145 *
146 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
147 * Fixed Cyclom-4Yo hardware detection bug.
148 *
149 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
Alan Cox15ed6cc2008-04-30 00:53:55 -0700150 * /proc/cyclades implementation with great collaboration of
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 * Marc Lewis <marc@blarg.net>;
152 * cyy_interrupt was changed to avoid occurrence of kernel oopses
153 * during PPP operation.
154 *
155 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
156 * General code review in order to comply with 2.1 kernel standards;
157 * data loss prevention for slow devices revisited (cy_wait_until_sent
158 * was created);
Alan Cox15ed6cc2008-04-30 00:53:55 -0700159 * removed conditional compilation for new/old PCI structure support
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 * (now the driver only supports the new PCI structure).
161 *
162 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
163 * added conditional compilation for new/old PCI structure support;
164 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
165 *
166 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
167 * cleaned up the data loss fix;
168 * fixed XON/XOFF handling once more (Cyclades-Z);
169 * general review of the driver routines;
Alan Cox15ed6cc2008-04-30 00:53:55 -0700170 * introduction of a mechanism to prevent data loss with slow
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 * printers, by forcing a delay before closing the port.
172 *
173 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
174 * fixed detection/handling of new CD1400 in Ye boards;
175 * fixed XON/XOFF handling (Cyclades-Z);
176 * fixed data loss caused by a premature port close;
177 * introduction of a flag that holds the CD1400 version ID per port
178 * (used by the CYGETCD1400VER new ioctl).
179 *
180 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
181 * Code review for the module cleanup routine;
182 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
183 * includes anonymous changes regarding signal_pending.
Alan Cox15ed6cc2008-04-30 00:53:55 -0700184 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 * Revision 2.1 1997/11/01 17:42:41 ivan
186 * Changes in the driver to support Alpha systems (except 8Zo V_1);
187 * BREAK fix for the Cyclades-Z boards;
188 * driver inactivity control by FW implemented;
Alan Cox15ed6cc2008-04-30 00:53:55 -0700189 * introduction of flag that allows driver to take advantage of
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 * a special CD1400 feature related to HW flow control;
191 * added support for the CD1400 rev. J (Cyclom-Y boards);
192 * introduction of ioctls to:
193 * - control the rtsdtr_inv flag (Cyclom-Y);
194 * - control the rflow flag (Cyclom-Y);
195 * - adjust the polling interval (Cyclades-Z);
196 *
197 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
Alan Cox15ed6cc2008-04-30 00:53:55 -0700198 * Fixes related to kernel version conditional
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 * compilation.
Alan Cox15ed6cc2008-04-30 00:53:55 -0700200 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
Alan Cox15ed6cc2008-04-30 00:53:55 -0700202 * Compatibility issues between kernels 2.0.x and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 * 2.1.x (mainly related to clear_bit function).
Alan Cox15ed6cc2008-04-30 00:53:55 -0700204 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
Alan Cox15ed6cc2008-04-30 00:53:55 -0700206 * Changes to define the memory window according to the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 * board type.
Alan Cox15ed6cc2008-04-30 00:53:55 -0700208 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
210 * Changes to support new cycladesZ boards.
211 *
212 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
213 * Merge of Bentson's and Daniel's version 1.36.4.28.
214 * Corrects bug in cy_detect_pci: check if there are more
215 * ports than the number of static structs allocated.
216 * Warning message during initialization if this driver is
217 * used with the new generation of cycladesZ boards. Those
218 * will be supported only in next release of the driver.
219 * Corrects bug in cy_detect_pci and cy_detect_isa that
220 * returned wrong number of VALID boards, when a cyclomY
221 * was found with no serial modules connected.
222 * Changes to use current (2.1.x) kernel subroutine names
223 * and created macros for compilation with 2.0.x kernel,
224 * instead of the other way around.
225 *
226 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
227 * Change queue_task_irq_off to queue_task_irq.
228 * The inline function queue_task_irq_off (tqueue.h)
229 * was removed from latest releases of 2.1.x kernel.
230 * Use of macro __init to mark the initialization
231 * routines, so memory can be reused.
232 * Also incorporate implementation of critical region
233 * in function cleanup_module() created by anonymous
234 * linuxer.
235 *
236 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
237 * Change to support new firmware that solves DCD problem:
238 * application could fail to receive SIGHUP signal when DCD
239 * varying too fast.
240 *
241 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
242 * Changed for support linux versions 2.1.X.
243 * Backward compatible with linux versions 2.0.X.
244 * Corrected illegal use of filler field in
245 * CH_CTRL struct.
246 * Deleted some debug messages.
247 *
248 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
249 * Included check for NULL tty pointer in cyz_poll.
250 *
251 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
252 * Bill Foster at Blarg! Online services noticed that
253 * some of the switch elements of -Z modem control
254 * lacked a closing "break;"
255 *
256 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
257 * Changed low water threshold for buffer xmit_buf
258 *
259 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
260 * Marcio provided fix to modem status fetch for -Z
261 *
262 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
263 * improve mapping of -Z control page (thanks to Steve
264 * Price <stevep@fa.tdktca.com> for help on this)
265 *
266 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
267 * shift from CPU-bound to memcopy in cyz_polling operation
268 *
269 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
270 * Added support to set and report higher speeds.
271 *
272 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
273 * Some fixes in the HW flow control for the BETA release.
274 * Don't try to register the IRQ.
275 *
276 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
277 * make sure "cyc" appears in all kernel messages; all soft interrupts
278 * handled by same routine; recognize out-of-band reception; comment
279 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
Jean Delvare33430dc2005-10-30 15:02:20 -0800280 * fix race condition in -Z buffer management; only -Y needs to explicitly
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 * flush chars; tidy up some startup messages;
282 *
283 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
284 * shift MOD_INC_USE_COUNT location to match
285 * serial.c; purge some diagnostic messages;
286 *
287 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
288 * enable modem status messages and fetch & process them; note
289 * time of last activity type for each port; set_line_char now
290 * supports more than line 0 and treats 0 baud correctly;
291 * get_modem_info senses rs_status;
292 *
293 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
294 * barely works--now's time to turn on
295 * more features 'til it breaks
296 *
297 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
298 * check more -Z board status; shorten boot message
299 *
300 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
301 * fix reference to ch_ctrl in startup; verify return
302 * values from cyz_issue_cmd and cyz_update_channel;
303 * more stuff to get modem control correct;
304 *
305 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
306 * more -Z stuff folded in; re-order changes to put -Z stuff
307 * after -Y stuff (to make changes clearer)
308 *
309 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
310 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
311 * Add code to send break. Clear firmware ID word at startup (so
312 * that other code won't talk to inactive board).
313 *
314 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
315 * add code for -Z in set_line_char
316 *
317 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
318 * fold more -Z stuff (or in some cases, error messages)
319 * into driver; add text to "don't know what to do" messages.
320 *
321 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
322 * moved compile-time flags near top of file; cosmetic changes
323 * to narrow text (to allow 2-up printing); changed many declarations
324 * to "static" to limit external symbols; shuffled code order to
325 * coalesce -Y and -Z specific code, also to put internal functions
326 * in order of tty_driver structure; added code to recognize -Z
327 * ports (and for moment, do nothing or report error); add cy_startup
328 * to parse boot command line for extra base addresses for ISA probes;
329 *
330 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
331 * reorder some code, fix types of some vars (int vs. long),
332 * add cy_setup to support user declared ISA addresses
333 *
334 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
335 * dump ioctl based firmware load (it's now a user level
336 * program); ensure uninitialzed ports cannot be used
337 *
338 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
339 * rename vars and restructure some code
340 *
341 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
342 * get right status back after boot load
343 *
344 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
345 * successfully loads firmware
346 *
347 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
348 * add more of the code for the boot/load ioctls
349 *
350 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
351 * start to add Z functionality--starting with ioctl
352 * for loading firmware
353 *
354 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
355 * added code to recognize Z/PCI card at initialization; report
356 * presence, but card is not initialized (because firmware needs
357 * to be loaded)
358 *
359 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
360 * starting minor number at zero; added missing verify_area
Jan Engelhardt96de0e22007-10-19 23:21:04 +0200361 * as noted by Heiko Eißfeldt <heiko@colossus.escape.de>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 *
363 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
364 * remove unneeded boot message & fix CLOCAL hardware flow
365 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
366 * remove unused diagnostic statements; minor 0 is first;
367 *
368 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
369 * The kernel function vremap (available only in later 1.3.xx kernels)
370 * allows the access to memory addresses above the RAM. This revision
371 * of the driver supports PCI boards below 1Mb (device id 0x100) and
372 * above 1Mb (device id 0x101).
373 *
374 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
375 * Some global changes to interrupt handling spilled into
376 * this driver--mostly unused arguments in system function
377 * calls. Also added change by Marcio Saito which should
378 * reduce lost interrupts at startup by fast processors.
379 *
380 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
381 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
382 * in 1.3.41 kernel to remove a possible race condition, extend
383 * some error messages, and let the driver run as a loadable module
384 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
385 * possible race condition.
386 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
387 *
388 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
389 * Changes by Linus Torvalds in 1.3.33 kernel distribution
390 * required due to reordering of driver initialization.
391 * Drivers are now initialized *after* memory management.
392 *
393 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
394 * remove printk from ISR; fix typo
395 *
396 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
397 * Minor fixes in the PCI board support. PCI function calls in
398 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
399 * <duncan@okay.com>. "bad serial count" message removed.
400 *
401 * Revision 1.36.3 1995/08/22 09:19:42 marcio
402 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
403 * board initialization. Changes in the boot messages. The driver
404 * supports up to 4 boards and 64 ports by default.
405 *
406 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
407 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
408 *
409 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
410 * add missing break in modem control block in ioctl switch statement
411 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
412 *
413 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
414 * make sure CTS flow control is set as soon as possible (thanks
415 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
416 *
417 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
418 * initialize defaults for receive threshold and stale data timeout;
419 * cosmetic changes;
420 *
421 * Revision 1.36 1995/03/10 23:33:53 bentson
422 * added support of chips 4-7 in 32 port Cyclom-Ye;
423 * fix cy_interrupt pointer dereference problem
424 * (Joe Portman <baron@aa.net>);
425 * give better error response if open is attempted on non-existent port
426 * (Zachariah Vaum <jchryslr@netcom.com>);
427 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
428 * conditional compilation for -16Y on systems with fast, noisy bus;
429 * comment out diagnostic print function;
430 * cleaned up table of base addresses;
431 * set receiver time-out period register to correct value,
432 * set receive threshold to better default values,
433 * set chip timer to more accurate 200 Hz ticking,
434 * add code to monitor and modify receive parameters
435 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
436 * <njs@scifi.emi.net>);
437 *
438 * Revision 1.35 1994/12/16 13:54:18 steffen
439 * additional patch by Marcio Saito for board detection
440 * Accidently left out in 1.34
441 *
442 * Revision 1.34 1994/12/10 12:37:12 steffen
443 * This is the corrected version as suggested by Marcio Saito
444 *
445 * Revision 1.33 1994/12/01 22:41:18 bentson
446 * add hooks to support more high speeds directly; add tytso
447 * patch regarding CLOCAL wakeups
448 *
449 * Revision 1.32 1994/11/23 19:50:04 bentson
450 * allow direct kernel control of higher signalling rates;
451 * look for cards at additional locations
452 *
453 * Revision 1.31 1994/11/16 04:33:28 bentson
454 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
455 * a problem in chars_in_buffer has been resolved by some
456 * small changes; this should yield smoother output
457 *
458 * Revision 1.30 1994/11/16 04:28:05 bentson
459 * Fix from Corey Minyard, Internet: minyard@metronet.com,
460 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
461 * cy_hangup that appears to clear up much (all?) of the
462 * DTR glitches; also he's added/cleaned-up diagnostic messages
463 *
464 * Revision 1.29 1994/11/16 04:16:07 bentson
465 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
466 * operate higher speeds in same way as other serial ports;
467 * add more serial ports (for up to two 16-port muxes).
468 *
469 * Revision 1.28 1994/11/04 00:13:16 root
470 * turn off diagnostic messages
471 *
472 * Revision 1.27 1994/11/03 23:46:37 root
473 * bunch of changes to bring driver into greater conformance
474 * with the serial.c driver (looking for missed fixes)
475 *
476 * Revision 1.26 1994/11/03 22:40:36 root
477 * automatic interrupt probing fixed.
478 *
479 * Revision 1.25 1994/11/03 20:17:02 root
480 * start to implement auto-irq
481 *
482 * Revision 1.24 1994/11/03 18:01:55 root
483 * still working on modem signals--trying not to drop DTR
484 * during the getty/login processes
485 *
486 * Revision 1.23 1994/11/03 17:51:36 root
487 * extend baud rate support; set receive threshold as function
488 * of baud rate; fix some problems with RTS/CTS;
489 *
490 * Revision 1.22 1994/11/02 18:05:35 root
491 * changed arguments to udelay to type long to get
492 * delays to be of correct duration
493 *
494 * Revision 1.21 1994/11/02 17:37:30 root
495 * employ udelay (after calibrating loops_per_second earlier
496 * in init/main.c) instead of using home-grown delay routines
497 *
498 * Revision 1.20 1994/11/02 03:11:38 root
499 * cy_chars_in_buffer forces a return value of 0 to let
500 * login work (don't know why it does); some functions
501 * that were returning EFAULT, now executes the code;
502 * more work on deciding when to disable xmit interrupts;
503 *
504 * Revision 1.19 1994/11/01 20:10:14 root
505 * define routine to start transmission interrupts (by enabling
506 * transmit interrupts); directly enable/disable modem interrupts;
507 *
508 * Revision 1.18 1994/11/01 18:40:45 bentson
509 * Don't always enable transmit interrupts in startup; interrupt on
510 * TxMpty instead of TxRdy to help characters get out before shutdown;
511 * restructure xmit interrupt to check for chars first and quit if
512 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
513 * (to my view);
514 *
515 * Revision 1.17 1994/10/30 04:39:45 bentson
516 * rename serial_driver and callout_driver to cy_serial_driver and
517 * cy_callout_driver to avoid linkage interference; initialize
518 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
519 * from cyclades_port structure; add paranoia check to cy_close;
520 *
521 * Revision 1.16 1994/10/30 01:14:33 bentson
522 * change major numbers; add some _early_ return statements;
523 *
524 * Revision 1.15 1994/10/29 06:43:15 bentson
525 * final tidying up for clean compile; enable some error reporting
526 *
527 * Revision 1.14 1994/10/28 20:30:22 Bentson
528 * lots of changes to drag the driver towards the new tty_io
529 * structures and operation. not expected to work, but may
530 * compile cleanly.
531 *
532 * Revision 1.13 1994/07/21 23:08:57 Bentson
533 * add some diagnostic cruft; support 24 lines (for testing
534 * both -8Y and -16Y cards; be more thorough in servicing all
535 * chips during interrupt; add "volatile" a few places to
536 * circumvent compiler optimizations; fix base & offset
537 * computations in block_til_ready (was causing chip 0 to
538 * stop operation)
539 *
540 * Revision 1.12 1994/07/19 16:42:11 Bentson
541 * add some hackery for kernel version 1.1.8; expand
542 * error messages; refine timing for delay loops and
543 * declare loop params volatile
544 *
545 * Revision 1.11 1994/06/11 21:53:10 bentson
546 * get use of save_car right in transmit interrupt service
547 *
548 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
549 * add some diagnostic printing; try to fix save_car stuff
550 *
551 * Revision 1.10 1994/06/11 20:36:08 bentson
552 * clean up compiler warnings
553 *
554 * Revision 1.9 1994/06/11 19:42:46 bentson
555 * added a bunch of code to support modem signalling
556 *
557 * Revision 1.8 1994/06/11 17:57:07 bentson
558 * recognize break & parity error
559 *
560 * Revision 1.7 1994/06/05 05:51:34 bentson
561 * Reorder baud table to be monotonic; add cli to CP; discard
562 * incoming characters and status if the line isn't open; start to
563 * fold code into cy_throttle; start to port get_serial_info,
564 * set_serial_info, get_modem_info, set_modem_info, and send_break
565 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
566 * get flow control characters from tty struct; invalidate ports w/o
567 * hardware;
568 *
569 * Revision 1.6 1994/05/31 18:42:21 bentson
570 * add a loop-breaker in the interrupt service routine;
571 * note when port is initialized so that it can be shut
572 * down under the right conditions; receive works without
573 * any obvious errors
574 *
575 * Revision 1.5 1994/05/30 00:55:02 bentson
576 * transmit works without obvious errors
577 *
578 * Revision 1.4 1994/05/27 18:46:27 bentson
579 * incorporated more code from lib_y.c; can now print short
580 * strings under interrupt control to port zero; seems to
581 * select ports/channels/lines correctly
582 *
583 * Revision 1.3 1994/05/25 22:12:44 bentson
584 * shifting from multi-port on a card to proper multiplexor
585 * data structures; added skeletons of most routines
586 *
587 * Revision 1.2 1994/05/19 13:21:43 bentson
588 * start to crib from other sources
589 *
590 */
591
Jiri Slabyc8e16932007-05-08 00:37:05 -0700592#define CY_VERSION "2.5"
Jiri Slaby096dcfc2006-12-08 02:39:30 -0800593
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594/* If you need to install more boards than NR_CARDS, change the constant
595 in the definition below. No other change is necessary to support up to
596 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
597
Jiri Slaby02f11752006-12-08 02:39:28 -0800598#define NR_CARDS 4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599
600/*
601 If the total number of ports is larger than NR_PORTS, change this
602 constant in the definition below. No other change is necessary to
603 support more boards/ports. */
604
Jiri Slaby02f11752006-12-08 02:39:28 -0800605#define NR_PORTS 256
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606
607#define ZE_V1_NPORTS 64
608#define ZO_V1 0
609#define ZO_V2 1
610#define ZE_V1 2
611
612#define SERIAL_PARANOIA_CHECK
613#undef CY_DEBUG_OPEN
614#undef CY_DEBUG_THROTTLE
615#undef CY_DEBUG_OTHER
616#undef CY_DEBUG_IO
617#undef CY_DEBUG_COUNT
618#undef CY_DEBUG_DTR
619#undef CY_DEBUG_WAIT_UNTIL_SENT
620#undef CY_DEBUG_INTERRUPTS
621#undef CY_16Y_HACK
622#undef CY_ENABLE_MONITORING
623#undef CY_PCI_DEBUG
624
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625/*
Alan Cox15ed6cc2008-04-30 00:53:55 -0700626 * Include section
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628#include <linux/module.h>
629#include <linux/errno.h>
630#include <linux/signal.h>
631#include <linux/sched.h>
632#include <linux/timer.h>
633#include <linux/interrupt.h>
634#include <linux/tty.h>
Alan Cox33f0f882006-01-09 20:54:13 -0800635#include <linux/tty_flip.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636#include <linux/serial.h>
637#include <linux/major.h>
638#include <linux/string.h>
639#include <linux/fcntl.h>
640#include <linux/ptrace.h>
641#include <linux/cyclades.h>
642#include <linux/mm.h>
643#include <linux/ioport.h>
644#include <linux/init.h>
645#include <linux/delay.h>
646#include <linux/spinlock.h>
647#include <linux/bitops.h>
Jiri Slaby054f5b02007-07-17 04:05:16 -0700648#include <linux/firmware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649
650#include <asm/system.h>
Alan Cox15ed6cc2008-04-30 00:53:55 -0700651#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652#include <asm/irq.h>
Alan Cox15ed6cc2008-04-30 00:53:55 -0700653#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655#include <linux/kernel.h>
656#include <linux/pci.h>
657
658#include <linux/stat.h>
659#include <linux/proc_fs.h>
660
Jiri Slaby02f11752006-12-08 02:39:28 -0800661static void cy_throttle(struct tty_struct *tty);
662static void cy_send_xchar(struct tty_struct *tty, char ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663
Jiri Slaby65f76a82007-10-18 03:06:22 -0700664#define IS_CYC_Z(card) ((card).num_chips == (unsigned int)-1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665
666#define Z_FPGA_CHECK(card) \
Jiri Slabydb05c3b2007-05-08 00:35:46 -0700667 ((readl(&((struct RUNTIME_9060 __iomem *) \
Jiri Slaby02f11752006-12-08 02:39:28 -0800668 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669
Alan Cox15ed6cc2008-04-30 00:53:55 -0700670#define ISZLOADED(card) (((ZO_V1 == readl(&((struct RUNTIME_9060 __iomem *) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 ((card).ctl_addr))->mail_box_0)) || \
672 Z_FPGA_CHECK(card)) && \
Alan Cox15ed6cc2008-04-30 00:53:55 -0700673 (ZFIRM_ID == readl(&((struct FIRM_ID __iomem *) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 ((card).base_addr+ID_ADDRESS))->signature)))
675
676#ifndef SERIAL_XMIT_SIZE
677#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
678#endif
679#define WAKEUP_CHARS 256
680
681#define STD_COM_FLAGS (0)
682
Jiri Slaby054f5b02007-07-17 04:05:16 -0700683/* firmware stuff */
684#define ZL_MAX_BLOCKS 16
685#define DRIVER_VERSION 0x02010203
686#define RAM_SIZE 0x80000
687
688#define Z_FPGA_LOADED(X) ((readl(&(X)->init_ctrl) & (1<<17)) != 0)
689
690enum zblock_type {
691 ZBLOCK_PRG = 0,
692 ZBLOCK_FPGA = 1
693};
694
695struct zfile_header {
696 char name[64];
697 char date[32];
698 char aux[32];
699 u32 n_config;
700 u32 config_offset;
701 u32 n_blocks;
702 u32 block_offset;
703 u32 reserved[9];
704} __attribute__ ((packed));
705
706struct zfile_config {
707 char name[64];
708 u32 mailbox;
709 u32 function;
710 u32 n_blocks;
711 u32 block_list[ZL_MAX_BLOCKS];
712} __attribute__ ((packed));
713
714struct zfile_block {
715 u32 type;
716 u32 file_offset;
717 u32 ram_offset;
718 u32 size;
719} __attribute__ ((packed));
720
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721static struct tty_driver *cy_serial_driver;
722
723#ifdef CONFIG_ISA
724/* This is the address lookup table. The driver will probe for
725 Cyclom-Y/ISA boards at all addresses in here. If you want the
726 driver to probe addresses at a different address, add it to
727 this table. If the driver is probing some other board and
728 causing problems, remove the offending address from this table.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729*/
730
731static unsigned int cy_isa_addresses[] = {
Jiri Slaby02f11752006-12-08 02:39:28 -0800732 0xD0000,
733 0xD2000,
734 0xD4000,
735 0xD6000,
736 0xD8000,
737 0xDA000,
738 0xDC000,
739 0xDE000,
740 0, 0, 0, 0, 0, 0, 0, 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741};
Jiri Slaby02f11752006-12-08 02:39:28 -0800742
Tobias Klauserfe971072006-01-09 20:54:02 -0800743#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744
745#ifdef MODULE
Jiri Slaby3046d502007-05-08 00:36:46 -0700746static long maddr[NR_CARDS];
747static int irq[NR_CARDS];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748
749module_param_array(maddr, long, NULL, 0);
750module_param_array(irq, int, NULL, 0);
751#endif
752
Jiri Slaby02f11752006-12-08 02:39:28 -0800753#endif /* CONFIG_ISA */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754
755/* This is the per-card data structure containing address, irq, number of
756 channels, etc. This driver supports a maximum of NR_CARDS cards.
757*/
758static struct cyclades_card cy_card[NR_CARDS];
759
Jiri Slaby02f11752006-12-08 02:39:28 -0800760static int cy_next_channel; /* next minor available */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761
762/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 * This is used to look up the divisor speeds and the timeouts
764 * We're normally limited to 15 distinct baud rates. The extra
Alan Cox77451e52008-07-16 21:57:02 +0100765 * are accessed via settings in info->port.flags.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
767 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
768 * HI VHI
769 * 20
770 */
771static int baud_table[] = {
Jiri Slaby02f11752006-12-08 02:39:28 -0800772 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
773 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
774 230400, 0
775};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776
Jiri Slaby02f11752006-12-08 02:39:28 -0800777static char baud_co_25[] = { /* 25 MHz clock option table */
778 /* value => 00 01 02 03 04 */
779 /* divide by 8 32 128 512 2048 */
780 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
781 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
782};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783
Jiri Slaby02f11752006-12-08 02:39:28 -0800784static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
785 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
786 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
787};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788
Jiri Slaby02f11752006-12-08 02:39:28 -0800789static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
790 /* value => 00 01 02 03 04 */
791 /* divide by 8 32 128 512 2048 */
792 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
793 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
794 0x00
795};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796
Jiri Slaby02f11752006-12-08 02:39:28 -0800797static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
798 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
799 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
800 0x21
801};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802
Jiri Slaby02f11752006-12-08 02:39:28 -0800803static char baud_cor3[] = { /* receive threshold */
804 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
805 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
806 0x07
807};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808
809/*
810 * The Cyclades driver implements HW flow control as any serial driver.
Alan Cox15ed6cc2008-04-30 00:53:55 -0700811 * The cyclades_port structure member rflow and the vector rflow_thr
812 * allows us to take advantage of a special feature in the CD1400 to avoid
813 * data loss even when the system interrupt latency is too high. These flags
814 * are to be used only with very special applications. Setting these flags
815 * requires the use of a special cable (DTR and RTS reversed). In the new
816 * CD1400-based boards (rev. 6.00 or later), there is no need for special
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 * cables.
818 */
819
Jiri Slaby02f11752006-12-08 02:39:28 -0800820static char rflow_thr[] = { /* rflow threshold */
821 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
822 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
823 0x0a
824};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825
826/* The Cyclom-Ye has placed the sequential chips in non-sequential
827 * address order. This look-up table overcomes that problem.
828 */
Jiri Slaby02f11752006-12-08 02:39:28 -0800829static int cy_chip_offset[] = { 0x0000,
830 0x0400,
831 0x0800,
832 0x0C00,
833 0x0200,
834 0x0600,
835 0x0A00,
836 0x0E00
837};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838
839/* PCI related definitions */
840
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841#ifdef CONFIG_PCI
Jiri Slaby893de2d2007-02-12 00:51:49 -0800842static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
Alan Cox15ed6cc2008-04-30 00:53:55 -0700843 /* PCI < 1Mb */
844 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
845 /* PCI > 1Mb */
846 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
847 /* 4Y PCI < 1Mb */
848 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
849 /* 4Y PCI > 1Mb */
850 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
851 /* 8Y PCI < 1Mb */
852 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
853 /* 8Y PCI > 1Mb */
854 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
855 /* Z PCI < 1Mb */
856 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
857 /* Z PCI > 1Mb */
858 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
Jiri Slaby893de2d2007-02-12 00:51:49 -0800859 { } /* end of table */
Jiri Slaby02f11752006-12-08 02:39:28 -0800860};
Jiri Slaby893de2d2007-02-12 00:51:49 -0800861MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862#endif
863
864static void cy_start(struct tty_struct *);
865static void set_line_char(struct cyclades_port *);
Klaus Kudielka1a86b5e2007-05-08 00:26:26 -0700866static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867#ifdef CONFIG_ISA
868static unsigned detect_isa_irq(void __iomem *);
Jiri Slaby02f11752006-12-08 02:39:28 -0800869#endif /* CONFIG_ISA */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870
Jiri Slaby02f11752006-12-08 02:39:28 -0800871static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872
873#ifndef CONFIG_CYZ_INTR
874static void cyz_poll(unsigned long);
875
876/* The Cyclades-Z polling cycle is defined by this variable */
877static long cyz_polling_cycle = CZ_DEF_POLL;
878
Ingo Molnar8d06afa2005-09-09 13:10:40 -0700879static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880
Jiri Slaby02f11752006-12-08 02:39:28 -0800881#else /* CONFIG_CYZ_INTR */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882static void cyz_rx_restart(unsigned long);
883static struct timer_list cyz_rx_full_timer[NR_PORTS];
Jiri Slaby02f11752006-12-08 02:39:28 -0800884#endif /* CONFIG_CYZ_INTR */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885
Jiri Slaby02f11752006-12-08 02:39:28 -0800886static inline int serial_paranoia_check(struct cyclades_port *info,
887 char *name, const char *routine)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888{
889#ifdef SERIAL_PARANOIA_CHECK
Jiri Slaby02f11752006-12-08 02:39:28 -0800890 if (!info) {
Jiri Slaby21719192007-05-08 00:36:42 -0700891 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
892 "in %s\n", name, routine);
Jiri Slaby02f11752006-12-08 02:39:28 -0800893 return 1;
894 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895
Jiri Slaby02f11752006-12-08 02:39:28 -0800896 if (info->magic != CYCLADES_MAGIC) {
Jiri Slaby21719192007-05-08 00:36:42 -0700897 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
898 "struct (%s) in %s\n", name, routine);
Jiri Slaby02f11752006-12-08 02:39:28 -0800899 return 1;
900 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901#endif
Jiri Slaby02f11752006-12-08 02:39:28 -0800902 return 0;
903} /* serial_paranoia_check */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905/***********************************************************/
906/********* Start of block of Cyclom-Y specific code ********/
907
908/* This routine waits up to 1000 micro-seconds for the previous
909 command to the Cirrus chip to complete and then issues the
910 new command. An error is returned if the previous command
911 didn't finish within the time limit.
912
913 This function is only called from inside spinlock-protected code.
914 */
Alan Cox15ed6cc2008-04-30 00:53:55 -0700915static int cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916{
Jiri Slabyad39c302007-05-08 00:35:49 -0700917 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918
Jiri Slaby02f11752006-12-08 02:39:28 -0800919 /* Check to see that the previous command has completed */
920 for (i = 0; i < 100; i++) {
Alan Cox15ed6cc2008-04-30 00:53:55 -0700921 if (readb(base_addr + (CyCCR << index)) == 0)
Jiri Slaby02f11752006-12-08 02:39:28 -0800922 break;
Jiri Slaby02f11752006-12-08 02:39:28 -0800923 udelay(10L);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 }
Jiri Slaby02f11752006-12-08 02:39:28 -0800925 /* if the CCR never cleared, the previous command
926 didn't finish within the "reasonable time" */
927 if (i == 100)
Jiri Slaby096dcfc2006-12-08 02:39:30 -0800928 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929
Jiri Slaby02f11752006-12-08 02:39:28 -0800930 /* Issue the new command */
931 cy_writeb(base_addr + (CyCCR << index), cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932
Jiri Slaby096dcfc2006-12-08 02:39:30 -0800933 return 0;
Jiri Slaby02f11752006-12-08 02:39:28 -0800934} /* cyy_issue_cmd */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935
936#ifdef CONFIG_ISA
937/* ISA interrupt detection code */
Alan Cox15ed6cc2008-04-30 00:53:55 -0700938static unsigned detect_isa_irq(void __iomem *address)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939{
Jiri Slaby02f11752006-12-08 02:39:28 -0800940 int irq;
941 unsigned long irqs, flags;
942 int save_xir, save_car;
943 int index = 0; /* IRQ probing is only for ISA */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944
Jiri Slaby02f11752006-12-08 02:39:28 -0800945 /* forget possible initially masked and pending IRQ */
946 irq = probe_irq_off(probe_irq_on());
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947
Jiri Slaby02f11752006-12-08 02:39:28 -0800948 /* Clear interrupts on the board first */
949 cy_writeb(address + (Cy_ClrIntr << index), 0);
950 /* Cy_ClrIntr is 0x1800 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951
Jiri Slaby02f11752006-12-08 02:39:28 -0800952 irqs = probe_irq_on();
953 /* Wait ... */
954 udelay(5000L);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955
Jiri Slaby02f11752006-12-08 02:39:28 -0800956 /* Enable the Tx interrupts on the CD1400 */
957 local_irq_save(flags);
958 cy_writeb(address + (CyCAR << index), 0);
959 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960
Jiri Slaby02f11752006-12-08 02:39:28 -0800961 cy_writeb(address + (CyCAR << index), 0);
962 cy_writeb(address + (CySRER << index),
Jiri Slabydb05c3b2007-05-08 00:35:46 -0700963 readb(address + (CySRER << index)) | CyTxRdy);
Jiri Slaby02f11752006-12-08 02:39:28 -0800964 local_irq_restore(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965
Jiri Slaby02f11752006-12-08 02:39:28 -0800966 /* Wait ... */
967 udelay(5000L);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968
Jiri Slaby02f11752006-12-08 02:39:28 -0800969 /* Check which interrupt is in use */
970 irq = probe_irq_off(irqs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971
Jiri Slaby02f11752006-12-08 02:39:28 -0800972 /* Clean up */
Jiri Slabydb05c3b2007-05-08 00:35:46 -0700973 save_xir = (u_char) readb(address + (CyTIR << index));
974 save_car = readb(address + (CyCAR << index));
Jiri Slaby02f11752006-12-08 02:39:28 -0800975 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
976 cy_writeb(address + (CySRER << index),
Jiri Slabydb05c3b2007-05-08 00:35:46 -0700977 readb(address + (CySRER << index)) & ~CyTxRdy);
Jiri Slaby02f11752006-12-08 02:39:28 -0800978 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
979 cy_writeb(address + (CyCAR << index), (save_car));
980 cy_writeb(address + (Cy_ClrIntr << index), 0);
981 /* Cy_ClrIntr is 0x1800 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982
Jiri Slaby02f11752006-12-08 02:39:28 -0800983 return (irq > 0) ? irq : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984}
Jiri Slaby02f11752006-12-08 02:39:28 -0800985#endif /* CONFIG_ISA */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986
Jiri Slabyce97a092007-10-18 03:06:21 -0700987static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
988 void __iomem *base_addr)
Jiri Slabye9410272006-12-08 02:39:28 -0800989{
990 struct cyclades_port *info;
991 struct tty_struct *tty;
Jiri Slaby65f76a82007-10-18 03:06:22 -0700992 int len, index = cinfo->bus_index;
993 u8 save_xir, channel, save_car, data, char_count;
Jiri Slabye9410272006-12-08 02:39:28 -0800994
Jiri Slabye9410272006-12-08 02:39:28 -0800995#ifdef CY_DEBUG_INTERRUPTS
Jiri Slabyce97a092007-10-18 03:06:21 -0700996 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
Jiri Slabye9410272006-12-08 02:39:28 -0800997#endif
Jiri Slabyce97a092007-10-18 03:06:21 -0700998 /* determine the channel & change to that context */
Jiri Slaby65f76a82007-10-18 03:06:22 -0700999 save_xir = readb(base_addr + (CyRIR << index));
1000 channel = save_xir & CyIRChannel;
Jiri Slabyce97a092007-10-18 03:06:21 -07001001 info = &cinfo->ports[channel + chip * 4];
1002 save_car = readb(base_addr + (CyCAR << index));
1003 cy_writeb(base_addr + (CyCAR << index), save_xir);
Jiri Slabye9410272006-12-08 02:39:28 -08001004
Jiri Slabyce97a092007-10-18 03:06:21 -07001005 /* if there is nowhere to put the data, discard it */
Alan Cox77451e52008-07-16 21:57:02 +01001006 if (info->port.tty == NULL) {
Jiri Slaby65f76a82007-10-18 03:06:22 -07001007 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1008 CyIVRRxEx) { /* exception */
Jiri Slabyce97a092007-10-18 03:06:21 -07001009 data = readb(base_addr + (CyRDSR << index));
1010 } else { /* normal character reception */
1011 char_count = readb(base_addr + (CyRDCR << index));
1012 while (char_count--)
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001013 data = readb(base_addr + (CyRDSR << index));
Jiri Slabyce97a092007-10-18 03:06:21 -07001014 }
1015 goto end;
1016 }
1017 /* there is an open port for this data */
Alan Cox77451e52008-07-16 21:57:02 +01001018 tty = info->port.tty;
Jiri Slaby65f76a82007-10-18 03:06:22 -07001019 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1020 CyIVRRxEx) { /* exception */
Jiri Slabyce97a092007-10-18 03:06:21 -07001021 data = readb(base_addr + (CyRDSR << index));
Jiri Slaby02f11752006-12-08 02:39:28 -08001022
Jiri Slabyce97a092007-10-18 03:06:21 -07001023 /* For statistics only */
1024 if (data & CyBREAK)
1025 info->icount.brk++;
1026 else if (data & CyFRAME)
1027 info->icount.frame++;
1028 else if (data & CyPARITY)
1029 info->icount.parity++;
1030 else if (data & CyOVERRUN)
1031 info->icount.overrun++;
Jiri Slaby02f11752006-12-08 02:39:28 -08001032
Jiri Slabyce97a092007-10-18 03:06:21 -07001033 if (data & info->ignore_status_mask) {
1034 info->icount.rx++;
Jiri Slabyce97a092007-10-18 03:06:21 -07001035 return;
1036 }
1037 if (tty_buffer_request_room(tty, 1)) {
1038 if (data & info->read_status_mask) {
1039 if (data & CyBREAK) {
1040 tty_insert_flip_char(tty,
1041 readb(base_addr + (CyRDSR <<
1042 index)), TTY_BREAK);
Jiri Slaby02f11752006-12-08 02:39:28 -08001043 info->icount.rx++;
Alan Cox77451e52008-07-16 21:57:02 +01001044 if (info->port.flags & ASYNC_SAK)
Jiri Slabyce97a092007-10-18 03:06:21 -07001045 do_SAK(tty);
1046 } else if (data & CyFRAME) {
Alan Cox15ed6cc2008-04-30 00:53:55 -07001047 tty_insert_flip_char(tty,
Jiri Slabyce97a092007-10-18 03:06:21 -07001048 readb(base_addr + (CyRDSR <<
1049 index)), TTY_FRAME);
1050 info->icount.rx++;
1051 info->idle_stats.frame_errs++;
1052 } else if (data & CyPARITY) {
1053 /* Pieces of seven... */
1054 tty_insert_flip_char(tty,
1055 readb(base_addr + (CyRDSR <<
1056 index)), TTY_PARITY);
1057 info->icount.rx++;
1058 info->idle_stats.parity_errs++;
1059 } else if (data & CyOVERRUN) {
1060 tty_insert_flip_char(tty, 0,
1061 TTY_OVERRUN);
1062 info->icount.rx++;
1063 /* If the flip buffer itself is
1064 overflowing, we still lose
1065 the next incoming character.
1066 */
1067 tty_insert_flip_char(tty,
1068 readb(base_addr + (CyRDSR <<
1069 index)), TTY_FRAME);
1070 info->icount.rx++;
Jiri Slaby02f11752006-12-08 02:39:28 -08001071 info->idle_stats.overruns++;
Jiri Slabyce97a092007-10-18 03:06:21 -07001072 /* These two conditions may imply */
1073 /* a normal read should be done. */
1074 /* } else if(data & CyTIMEOUT) { */
1075 /* } else if(data & CySPECHAR) { */
1076 } else {
1077 tty_insert_flip_char(tty, 0,
1078 TTY_NORMAL);
1079 info->icount.rx++;
Jiri Slaby02f11752006-12-08 02:39:28 -08001080 }
Jiri Slabyce97a092007-10-18 03:06:21 -07001081 } else {
1082 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1083 info->icount.rx++;
1084 }
1085 } else {
1086 /* there was a software buffer overrun and nothing
1087 * could be done about it!!! */
1088 info->icount.buf_overrun++;
1089 info->idle_stats.overruns++;
1090 }
1091 } else { /* normal character reception */
1092 /* load # chars available from the chip */
1093 char_count = readb(base_addr + (CyRDCR << index));
Jiri Slabye9410272006-12-08 02:39:28 -08001094
1095#ifdef CY_ENABLE_MONITORING
Jiri Slabyce97a092007-10-18 03:06:21 -07001096 ++info->mon.int_count;
1097 info->mon.char_count += char_count;
1098 if (char_count > info->mon.char_max)
1099 info->mon.char_max = char_count;
1100 info->mon.char_last = char_count;
Jiri Slabye9410272006-12-08 02:39:28 -08001101#endif
Jiri Slabyce97a092007-10-18 03:06:21 -07001102 len = tty_buffer_request_room(tty, char_count);
1103 while (len--) {
1104 data = readb(base_addr + (CyRDSR << index));
1105 tty_insert_flip_char(tty, data, TTY_NORMAL);
1106 info->idle_stats.recv_bytes++;
1107 info->icount.rx++;
Jiri Slabye9410272006-12-08 02:39:28 -08001108#ifdef CY_16Y_HACK
Jiri Slabyce97a092007-10-18 03:06:21 -07001109 udelay(10L);
Jiri Slabye9410272006-12-08 02:39:28 -08001110#endif
Jiri Slabye9410272006-12-08 02:39:28 -08001111 }
Jiri Slabyce97a092007-10-18 03:06:21 -07001112 info->idle_stats.recv_idle = jiffies;
1113 }
1114 tty_schedule_flip(tty);
1115end:
1116 /* end of service */
1117 cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f);
1118 cy_writeb(base_addr + (CyCAR << index), save_car);
Jiri Slabyce97a092007-10-18 03:06:21 -07001119}
1120
Jiri Slaby65f76a82007-10-18 03:06:22 -07001121static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
Jiri Slabyce97a092007-10-18 03:06:21 -07001122 void __iomem *base_addr)
1123{
1124 struct cyclades_port *info;
Jiri Slaby65f76a82007-10-18 03:06:22 -07001125 int char_count, index = cinfo->bus_index;
1126 u8 save_xir, channel, save_car, outch;
Jiri Slabyce97a092007-10-18 03:06:21 -07001127
1128 /* Since we only get here when the transmit buffer
1129 is empty, we know we can always stuff a dozen
1130 characters. */
1131#ifdef CY_DEBUG_INTERRUPTS
1132 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1133#endif
1134
1135 /* determine the channel & change to that context */
Jiri Slaby65f76a82007-10-18 03:06:22 -07001136 save_xir = readb(base_addr + (CyTIR << index));
1137 channel = save_xir & CyIRChannel;
Jiri Slabyce97a092007-10-18 03:06:21 -07001138 save_car = readb(base_addr + (CyCAR << index));
1139 cy_writeb(base_addr + (CyCAR << index), save_xir);
1140
1141 /* validate the port# (as configured and open) */
1142 if (channel + chip * 4 >= cinfo->nports) {
1143 cy_writeb(base_addr + (CySRER << index),
1144 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1145 goto end;
1146 }
1147 info = &cinfo->ports[channel + chip * 4];
Alan Cox77451e52008-07-16 21:57:02 +01001148 if (info->port.tty == NULL) {
Jiri Slabyce97a092007-10-18 03:06:21 -07001149 cy_writeb(base_addr + (CySRER << index),
1150 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1151 goto end;
Jiri Slabye9410272006-12-08 02:39:28 -08001152 }
1153
Jiri Slabyce97a092007-10-18 03:06:21 -07001154 /* load the on-chip space for outbound data */
1155 char_count = info->xmit_fifo_size;
Jiri Slabye9410272006-12-08 02:39:28 -08001156
Jiri Slabyce97a092007-10-18 03:06:21 -07001157 if (info->x_char) { /* send special char */
1158 outch = info->x_char;
1159 cy_writeb(base_addr + (CyTDR << index), outch);
1160 char_count--;
1161 info->icount.tx++;
1162 info->x_char = 0;
1163 }
Jiri Slabye9410272006-12-08 02:39:28 -08001164
Jiri Slabyce97a092007-10-18 03:06:21 -07001165 if (info->breakon || info->breakoff) {
1166 if (info->breakon) {
1167 cy_writeb(base_addr + (CyTDR << index), 0);
1168 cy_writeb(base_addr + (CyTDR << index), 0x81);
1169 info->breakon = 0;
1170 char_count -= 2;
Jiri Slaby02f11752006-12-08 02:39:28 -08001171 }
Jiri Slabyce97a092007-10-18 03:06:21 -07001172 if (info->breakoff) {
1173 cy_writeb(base_addr + (CyTDR << index), 0);
1174 cy_writeb(base_addr + (CyTDR << index), 0x83);
1175 info->breakoff = 0;
1176 char_count -= 2;
Jiri Slaby02f11752006-12-08 02:39:28 -08001177 }
Jiri Slabyce97a092007-10-18 03:06:21 -07001178 }
Jiri Slabye9410272006-12-08 02:39:28 -08001179
Jiri Slabyce97a092007-10-18 03:06:21 -07001180 while (char_count-- > 0) {
1181 if (!info->xmit_cnt) {
1182 if (readb(base_addr + (CySRER << index)) & CyTxMpty) {
1183 cy_writeb(base_addr + (CySRER << index),
1184 readb(base_addr + (CySRER << index)) &
Jiri Slaby02f11752006-12-08 02:39:28 -08001185 ~CyTxMpty);
Jiri Slabyce97a092007-10-18 03:06:21 -07001186 } else {
1187 cy_writeb(base_addr + (CySRER << index),
1188 (readb(base_addr + (CySRER << index)) &
Jiri Slaby02f11752006-12-08 02:39:28 -08001189 ~CyTxRdy) | CyTxMpty);
Jiri Slaby02f11752006-12-08 02:39:28 -08001190 }
Jiri Slabyce97a092007-10-18 03:06:21 -07001191 goto done;
1192 }
Alan Cox77451e52008-07-16 21:57:02 +01001193 if (info->port.xmit_buf == NULL) {
Jiri Slabyce97a092007-10-18 03:06:21 -07001194 cy_writeb(base_addr + (CySRER << index),
1195 readb(base_addr + (CySRER << index)) &
Jiri Slaby02f11752006-12-08 02:39:28 -08001196 ~CyTxRdy);
Jiri Slabyce97a092007-10-18 03:06:21 -07001197 goto done;
1198 }
Alan Cox77451e52008-07-16 21:57:02 +01001199 if (info->port.tty->stopped || info->port.tty->hw_stopped) {
Jiri Slabyce97a092007-10-18 03:06:21 -07001200 cy_writeb(base_addr + (CySRER << index),
1201 readb(base_addr + (CySRER << index)) &
Jiri Slaby02f11752006-12-08 02:39:28 -08001202 ~CyTxRdy);
Jiri Slabyce97a092007-10-18 03:06:21 -07001203 goto done;
1204 }
1205 /* Because the Embedded Transmit Commands have been enabled,
1206 * we must check to see if the escape character, NULL, is being
1207 * sent. If it is, we must ensure that there is room for it to
1208 * be doubled in the output stream. Therefore we no longer
1209 * advance the pointer when the character is fetched, but
1210 * rather wait until after the check for a NULL output
1211 * character. This is necessary because there may not be room
1212 * for the two chars needed to send a NULL.)
1213 */
Alan Cox77451e52008-07-16 21:57:02 +01001214 outch = info->port.xmit_buf[info->xmit_tail];
Jiri Slabyce97a092007-10-18 03:06:21 -07001215 if (outch) {
1216 info->xmit_cnt--;
1217 info->xmit_tail = (info->xmit_tail + 1) &
1218 (SERIAL_XMIT_SIZE - 1);
1219 cy_writeb(base_addr + (CyTDR << index), outch);
1220 info->icount.tx++;
1221 } else {
1222 if (char_count > 1) {
Jiri Slaby02f11752006-12-08 02:39:28 -08001223 info->xmit_cnt--;
1224 info->xmit_tail = (info->xmit_tail + 1) &
Jiri Slabyce97a092007-10-18 03:06:21 -07001225 (SERIAL_XMIT_SIZE - 1);
Jiri Slaby02f11752006-12-08 02:39:28 -08001226 cy_writeb(base_addr + (CyTDR << index), outch);
Jiri Slabyce97a092007-10-18 03:06:21 -07001227 cy_writeb(base_addr + (CyTDR << index), 0);
Jiri Slaby02f11752006-12-08 02:39:28 -08001228 info->icount.tx++;
Jiri Slabyce97a092007-10-18 03:06:21 -07001229 char_count--;
Jiri Slaby02f11752006-12-08 02:39:28 -08001230 }
1231 }
Jiri Slabye9410272006-12-08 02:39:28 -08001232 }
1233
Jiri Slabyce97a092007-10-18 03:06:21 -07001234done:
Alan Cox77451e52008-07-16 21:57:02 +01001235 tty_wakeup(info->port.tty);
Jiri Slabyce97a092007-10-18 03:06:21 -07001236end:
1237 /* end of service */
1238 cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
1239 cy_writeb(base_addr + (CyCAR << index), save_car);
Jiri Slabyce97a092007-10-18 03:06:21 -07001240}
Jiri Slabye9410272006-12-08 02:39:28 -08001241
Jiri Slabyce97a092007-10-18 03:06:21 -07001242static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
1243 void __iomem *base_addr)
1244{
1245 struct cyclades_port *info;
Jiri Slaby65f76a82007-10-18 03:06:22 -07001246 int index = cinfo->bus_index;
1247 u8 save_xir, channel, save_car, mdm_change, mdm_status;
Jiri Slabye9410272006-12-08 02:39:28 -08001248
Jiri Slabyce97a092007-10-18 03:06:21 -07001249 /* determine the channel & change to that context */
Jiri Slaby65f76a82007-10-18 03:06:22 -07001250 save_xir = readb(base_addr + (CyMIR << index));
1251 channel = save_xir & CyIRChannel;
Jiri Slabyce97a092007-10-18 03:06:21 -07001252 info = &cinfo->ports[channel + chip * 4];
1253 save_car = readb(base_addr + (CyCAR << index));
1254 cy_writeb(base_addr + (CyCAR << index), save_xir);
Jiri Slabye9410272006-12-08 02:39:28 -08001255
Jiri Slabyce97a092007-10-18 03:06:21 -07001256 mdm_change = readb(base_addr + (CyMISR << index));
1257 mdm_status = readb(base_addr + (CyMSVR1 << index));
Jiri Slabye9410272006-12-08 02:39:28 -08001258
Alan Cox77451e52008-07-16 21:57:02 +01001259 if (!info->port.tty)
Jiri Slabyce97a092007-10-18 03:06:21 -07001260 goto end;
Jiri Slaby02f11752006-12-08 02:39:28 -08001261
Jiri Slabyce97a092007-10-18 03:06:21 -07001262 if (mdm_change & CyANY_DELTA) {
1263 /* For statistics only */
1264 if (mdm_change & CyDCD)
1265 info->icount.dcd++;
1266 if (mdm_change & CyCTS)
1267 info->icount.cts++;
1268 if (mdm_change & CyDSR)
1269 info->icount.dsr++;
1270 if (mdm_change & CyRI)
1271 info->icount.rng++;
1272
1273 wake_up_interruptible(&info->delta_msr_wait);
1274 }
1275
Alan Cox77451e52008-07-16 21:57:02 +01001276 if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) {
Jiri Slabyce97a092007-10-18 03:06:21 -07001277 if (!(mdm_status & CyDCD)) {
Alan Cox77451e52008-07-16 21:57:02 +01001278 tty_hangup(info->port.tty);
1279 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
Jiri Slabye9410272006-12-08 02:39:28 -08001280 }
Alan Cox77451e52008-07-16 21:57:02 +01001281 wake_up_interruptible(&info->port.open_wait);
Jiri Slabye9410272006-12-08 02:39:28 -08001282 }
Alan Cox77451e52008-07-16 21:57:02 +01001283 if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) {
1284 if (info->port.tty->hw_stopped) {
Jiri Slabyce97a092007-10-18 03:06:21 -07001285 if (mdm_status & CyCTS) {
1286 /* cy_start isn't used
1287 because... !!! */
Alan Cox77451e52008-07-16 21:57:02 +01001288 info->port.tty->hw_stopped = 0;
Jiri Slabyce97a092007-10-18 03:06:21 -07001289 cy_writeb(base_addr + (CySRER << index),
1290 readb(base_addr + (CySRER << index)) |
1291 CyTxRdy);
Alan Cox77451e52008-07-16 21:57:02 +01001292 tty_wakeup(info->port.tty);
Jiri Slabyce97a092007-10-18 03:06:21 -07001293 }
1294 } else {
1295 if (!(mdm_status & CyCTS)) {
1296 /* cy_stop isn't used
1297 because ... !!! */
Alan Cox77451e52008-07-16 21:57:02 +01001298 info->port.tty->hw_stopped = 1;
Jiri Slabyce97a092007-10-18 03:06:21 -07001299 cy_writeb(base_addr + (CySRER << index),
1300 readb(base_addr + (CySRER << index)) &
1301 ~CyTxRdy);
1302 }
1303 }
1304 }
1305/* if (mdm_change & CyDSR) {
1306 }
1307 if (mdm_change & CyRI) {
1308 }*/
1309end:
1310 /* end of service */
1311 cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
1312 cy_writeb(base_addr + (CyCAR << index), save_car);
Jiri Slabye9410272006-12-08 02:39:28 -08001313}
1314
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315/* The real interrupt service routine is called
1316 whenever the card wants its hand held--chars
1317 received, out buffer empty, modem change, etc.
1318 */
Jiri Slaby02f11752006-12-08 02:39:28 -08001319static irqreturn_t cyy_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320{
Jiri Slaby02f11752006-12-08 02:39:28 -08001321 int status;
Jiri Slabyf7429032007-05-08 00:36:59 -07001322 struct cyclades_card *cinfo = dev_id;
Jiri Slaby02f11752006-12-08 02:39:28 -08001323 void __iomem *base_addr, *card_base_addr;
Jiri Slaby65f76a82007-10-18 03:06:22 -07001324 unsigned int chip, too_many, had_work;
Jiri Slaby02f11752006-12-08 02:39:28 -08001325 int index;
Jiri Slabye9410272006-12-08 02:39:28 -08001326
Jiri Slabyf7429032007-05-08 00:36:59 -07001327 if (unlikely(cinfo == NULL)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328#ifdef CY_DEBUG_INTERRUPTS
Alan Cox15ed6cc2008-04-30 00:53:55 -07001329 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
1330 irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08001332 return IRQ_NONE; /* spurious interrupt */
1333 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334
Jiri Slaby02f11752006-12-08 02:39:28 -08001335 card_base_addr = cinfo->base_addr;
1336 index = cinfo->bus_index;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337
Jiri Slabyf1e83c62007-05-08 00:36:24 -07001338 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1339 if (unlikely(card_base_addr == NULL))
1340 return IRQ_HANDLED;
1341
Jiri Slaby02f11752006-12-08 02:39:28 -08001342 /* This loop checks all chips in the card. Make a note whenever
1343 _any_ chip had some work to do, as this is considered an
1344 indication that there will be more to do. Only when no chip
1345 has any work does this outermost loop exit.
1346 */
1347 do {
1348 had_work = 0;
1349 for (chip = 0; chip < cinfo->num_chips; chip++) {
1350 base_addr = cinfo->base_addr +
1351 (cy_chip_offset[chip] << index);
1352 too_many = 0;
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001353 while ((status = readb(base_addr +
Jiri Slaby02f11752006-12-08 02:39:28 -08001354 (CySVRR << index))) != 0x00) {
1355 had_work++;
1356 /* The purpose of the following test is to ensure that
1357 no chip can monopolize the driver. This forces the
1358 chips to be checked in a round-robin fashion (after
1359 draining each of a bunch (1000) of characters).
1360 */
Jiri Slabyce97a092007-10-18 03:06:21 -07001361 if (1000 < too_many++)
Jiri Slaby02f11752006-12-08 02:39:28 -08001362 break;
Jiri Slaby1c0a3872007-10-18 03:06:22 -07001363 spin_lock(&cinfo->card_lock);
Jiri Slabyce97a092007-10-18 03:06:21 -07001364 if (status & CySRReceive) /* rx intr */
1365 cyy_chip_rx(cinfo, chip, base_addr);
1366 if (status & CySRTransmit) /* tx intr */
1367 cyy_chip_tx(cinfo, chip, base_addr);
1368 if (status & CySRModem) /* modem intr */
1369 cyy_chip_modem(cinfo, chip, base_addr);
Jiri Slaby1c0a3872007-10-18 03:06:22 -07001370 spin_unlock(&cinfo->card_lock);
Jiri Slaby02f11752006-12-08 02:39:28 -08001371 }
1372 }
1373 } while (had_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374
Jiri Slaby02f11752006-12-08 02:39:28 -08001375 /* clear interrupts */
1376 spin_lock(&cinfo->card_lock);
1377 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1378 /* Cy_ClrIntr is 0x1800 */
1379 spin_unlock(&cinfo->card_lock);
1380 return IRQ_HANDLED;
1381} /* cyy_interrupt */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382
1383/***********************************************************/
1384/********* End of block of Cyclom-Y specific code **********/
Alan Cox15ed6cc2008-04-30 00:53:55 -07001385/******** Start of block of Cyclades-Z specific code *******/
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386/***********************************************************/
1387
1388static int
Jiri Slaby02f11752006-12-08 02:39:28 -08001389cyz_fetch_msg(struct cyclades_card *cinfo,
Alan Cox15ed6cc2008-04-30 00:53:55 -07001390 __u32 *channel, __u8 *cmd, __u32 *param)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391{
Jiri Slaby02f11752006-12-08 02:39:28 -08001392 struct FIRM_ID __iomem *firm_id;
1393 struct ZFW_CTRL __iomem *zfw_ctrl;
1394 struct BOARD_CTRL __iomem *board_ctrl;
1395 unsigned long loc_doorbell;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396
Jiri Slaby02f11752006-12-08 02:39:28 -08001397 firm_id = cinfo->base_addr + ID_ADDRESS;
Alan Cox15ed6cc2008-04-30 00:53:55 -07001398 if (!ISZLOADED(*cinfo))
Jiri Slaby096dcfc2006-12-08 02:39:30 -08001399 return -1;
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001400 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
Jiri Slaby02f11752006-12-08 02:39:28 -08001401 board_ctrl = &zfw_ctrl->board_ctrl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001403 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
Jiri Slaby02f11752006-12-08 02:39:28 -08001404 (cinfo->ctl_addr))->loc_doorbell);
1405 if (loc_doorbell) {
1406 *cmd = (char)(0xff & loc_doorbell);
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001407 *channel = readl(&board_ctrl->fwcmd_channel);
1408 *param = (__u32) readl(&board_ctrl->fwcmd_param);
Jiri Slaby02f11752006-12-08 02:39:28 -08001409 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1410 loc_doorbell, 0xffffffff);
1411 return 1;
1412 }
1413 return 0;
1414} /* cyz_fetch_msg */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415
1416static int
Jiri Slaby02f11752006-12-08 02:39:28 -08001417cyz_issue_cmd(struct cyclades_card *cinfo,
Klaus Kudielka1a86b5e2007-05-08 00:26:26 -07001418 __u32 channel, __u8 cmd, __u32 param)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419{
Jiri Slaby02f11752006-12-08 02:39:28 -08001420 struct FIRM_ID __iomem *firm_id;
1421 struct ZFW_CTRL __iomem *zfw_ctrl;
1422 struct BOARD_CTRL __iomem *board_ctrl;
Klaus Kudielka1a86b5e2007-05-08 00:26:26 -07001423 __u32 __iomem *pci_doorbell;
Jiri Slaby65f76a82007-10-18 03:06:22 -07001424 unsigned int index;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425
Jiri Slaby02f11752006-12-08 02:39:28 -08001426 firm_id = cinfo->base_addr + ID_ADDRESS;
Alan Cox15ed6cc2008-04-30 00:53:55 -07001427 if (!ISZLOADED(*cinfo))
Jiri Slaby096dcfc2006-12-08 02:39:30 -08001428 return -1;
Alan Cox15ed6cc2008-04-30 00:53:55 -07001429
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001430 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
Jiri Slaby02f11752006-12-08 02:39:28 -08001431 board_ctrl = &zfw_ctrl->board_ctrl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432
Jiri Slaby02f11752006-12-08 02:39:28 -08001433 index = 0;
1434 pci_doorbell =
1435 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001436 while ((readl(pci_doorbell) & 0xff) != 0) {
Alan Cox15ed6cc2008-04-30 00:53:55 -07001437 if (index++ == 1000)
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001438 return (int)(readl(pci_doorbell) & 0xff);
Jiri Slaby02f11752006-12-08 02:39:28 -08001439 udelay(50L);
1440 }
1441 cy_writel(&board_ctrl->hcmd_channel, channel);
1442 cy_writel(&board_ctrl->hcmd_param, param);
1443 cy_writel(pci_doorbell, (long)cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444
Jiri Slaby096dcfc2006-12-08 02:39:30 -08001445 return 0;
Jiri Slaby02f11752006-12-08 02:39:28 -08001446} /* cyz_issue_cmd */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447
Jiri Slaby65f76a82007-10-18 03:06:22 -07001448static void cyz_handle_rx(struct cyclades_port *info,
Jiri Slabyad39c302007-05-08 00:35:49 -07001449 struct BUF_CTRL __iomem *buf_ctrl)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450{
Jiri Slaby875b2062007-05-08 00:36:49 -07001451 struct cyclades_card *cinfo = info->card;
Alan Cox77451e52008-07-16 21:57:02 +01001452 struct tty_struct *tty = info->port.tty;
Jiri Slaby65f76a82007-10-18 03:06:22 -07001453 unsigned int char_count;
Jiri Slaby02f11752006-12-08 02:39:28 -08001454 int len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455#ifdef BLOCKMOVE
Jiri Slabyce71b0f2007-05-08 00:36:53 -07001456 unsigned char *buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457#else
Jiri Slaby02f11752006-12-08 02:39:28 -08001458 char data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459#endif
Jiri Slabyad39c302007-05-08 00:35:49 -07001460 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001462 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1463 rx_put = readl(&buf_ctrl->rx_put);
1464 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1465 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
Jiri Slaby02f11752006-12-08 02:39:28 -08001466 if (rx_put >= rx_get)
1467 char_count = rx_put - rx_get;
1468 else
1469 char_count = rx_put - rx_get + rx_bufsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470
Jiri Slaby02f11752006-12-08 02:39:28 -08001471 if (char_count) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001472#ifdef CY_ENABLE_MONITORING
Jiri Slaby02f11752006-12-08 02:39:28 -08001473 info->mon.int_count++;
1474 info->mon.char_count += char_count;
1475 if (char_count > info->mon.char_max)
1476 info->mon.char_max = char_count;
1477 info->mon.char_last = char_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478#endif
Jiri Slabyf7429032007-05-08 00:36:59 -07001479 if (tty == NULL) {
Jiri Slaby02f11752006-12-08 02:39:28 -08001480 /* flush received characters */
1481 new_rx_get = (new_rx_get + char_count) &
1482 (rx_bufsize - 1);
1483 info->rflush_count++;
1484 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001485#ifdef BLOCKMOVE
Jiri Slaby02f11752006-12-08 02:39:28 -08001486 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1487 for performance, but because of buffer boundaries, there
1488 may be several steps to the operation */
Jiri Slabyce71b0f2007-05-08 00:36:53 -07001489 while (1) {
1490 len = tty_prepare_flip_string(tty, &buf,
1491 char_count);
1492 if (!len)
1493 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494
Jiri Slabyce71b0f2007-05-08 00:36:53 -07001495 len = min_t(unsigned int, min(len, char_count),
1496 rx_bufsize - new_rx_get);
1497
1498 memcpy_fromio(buf, cinfo->base_addr +
1499 rx_bufaddr + new_rx_get, len);
1500
1501 new_rx_get = (new_rx_get + len) &
Jiri Slaby02f11752006-12-08 02:39:28 -08001502 (rx_bufsize - 1);
Jiri Slabyce71b0f2007-05-08 00:36:53 -07001503 char_count -= len;
1504 info->icount.rx += len;
1505 info->idle_stats.recv_bytes += len;
Jiri Slaby02f11752006-12-08 02:39:28 -08001506 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507#else
Jiri Slaby02f11752006-12-08 02:39:28 -08001508 len = tty_buffer_request_room(tty, char_count);
1509 while (len--) {
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001510 data = readb(cinfo->base_addr + rx_bufaddr +
Jiri Slaby02f11752006-12-08 02:39:28 -08001511 new_rx_get);
Alan Cox15ed6cc2008-04-30 00:53:55 -07001512 new_rx_get = (new_rx_get + 1) &
1513 (rx_bufsize - 1);
Jiri Slaby02f11752006-12-08 02:39:28 -08001514 tty_insert_flip_char(tty, data, TTY_NORMAL);
1515 info->idle_stats.recv_bytes++;
1516 info->icount.rx++;
1517 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518#endif
1519#ifdef CONFIG_CYZ_INTR
Jiri Slaby02f11752006-12-08 02:39:28 -08001520 /* Recalculate the number of chars in the RX buffer and issue
1521 a cmd in case it's higher than the RX high water mark */
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001522 rx_put = readl(&buf_ctrl->rx_put);
Jiri Slaby02f11752006-12-08 02:39:28 -08001523 if (rx_put >= rx_get)
1524 char_count = rx_put - rx_get;
1525 else
1526 char_count = rx_put - rx_get + rx_bufsize;
Jiri Slaby65f76a82007-10-18 03:06:22 -07001527 if (char_count >= readl(&buf_ctrl->rx_threshold) &&
Jiri Slabyebafeef2007-10-18 03:06:20 -07001528 !timer_pending(&cyz_rx_full_timer[
1529 info->line]))
1530 mod_timer(&cyz_rx_full_timer[info->line],
1531 jiffies + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08001533 info->idle_stats.recv_idle = jiffies;
1534 tty_schedule_flip(tty);
1535 }
1536 /* Update rx_get */
1537 cy_writel(&buf_ctrl->rx_get, new_rx_get);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539}
1540
Jiri Slaby65f76a82007-10-18 03:06:22 -07001541static void cyz_handle_tx(struct cyclades_port *info,
Jiri Slabyad39c302007-05-08 00:35:49 -07001542 struct BUF_CTRL __iomem *buf_ctrl)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543{
Jiri Slaby875b2062007-05-08 00:36:49 -07001544 struct cyclades_card *cinfo = info->card;
Alan Cox77451e52008-07-16 21:57:02 +01001545 struct tty_struct *tty = info->port.tty;
Jiri Slaby65f76a82007-10-18 03:06:22 -07001546 u8 data;
1547 unsigned int char_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548#ifdef BLOCKMOVE
Jiri Slaby02f11752006-12-08 02:39:28 -08001549 int small_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550#endif
Jiri Slabyad39c302007-05-08 00:35:49 -07001551 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552
Jiri Slaby02f11752006-12-08 02:39:28 -08001553 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1554 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001556 tx_get = readl(&buf_ctrl->tx_get);
1557 tx_put = readl(&buf_ctrl->tx_put);
1558 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1559 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
Jiri Slaby02f11752006-12-08 02:39:28 -08001560 if (tx_put >= tx_get)
1561 char_count = tx_get - tx_put - 1 + tx_bufsize;
1562 else
1563 char_count = tx_get - tx_put - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564
Jiri Slaby02f11752006-12-08 02:39:28 -08001565 if (char_count) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566
Jiri Slabyf7429032007-05-08 00:36:59 -07001567 if (tty == NULL)
Jiri Slaby02f11752006-12-08 02:39:28 -08001568 goto ztxdone;
Jiri Slaby02f11752006-12-08 02:39:28 -08001569
1570 if (info->x_char) { /* send special char */
1571 data = info->x_char;
1572
1573 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1574 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1575 info->x_char = 0;
1576 char_count--;
1577 info->icount.tx++;
Jiri Slaby02f11752006-12-08 02:39:28 -08001578 }
1579#ifdef BLOCKMOVE
1580 while (0 < (small_count = min_t(unsigned int,
1581 tx_bufsize - tx_put, min_t(unsigned int,
1582 (SERIAL_XMIT_SIZE - info->xmit_tail),
1583 min_t(unsigned int, info->xmit_cnt,
1584 char_count))))) {
1585
1586 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1587 tx_put),
Alan Cox77451e52008-07-16 21:57:02 +01001588 &info->port.xmit_buf[info->xmit_tail],
Jiri Slaby02f11752006-12-08 02:39:28 -08001589 small_count);
1590
1591 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1592 char_count -= small_count;
1593 info->icount.tx += small_count;
1594 info->xmit_cnt -= small_count;
1595 info->xmit_tail = (info->xmit_tail + small_count) &
1596 (SERIAL_XMIT_SIZE - 1);
Jiri Slaby02f11752006-12-08 02:39:28 -08001597 }
1598#else
1599 while (info->xmit_cnt && char_count) {
Alan Cox77451e52008-07-16 21:57:02 +01001600 data = info->port.xmit_buf[info->xmit_tail];
Jiri Slaby02f11752006-12-08 02:39:28 -08001601 info->xmit_cnt--;
1602 info->xmit_tail = (info->xmit_tail + 1) &
1603 (SERIAL_XMIT_SIZE - 1);
1604
1605 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1606 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1607 char_count--;
1608 info->icount.tx++;
Jiri Slaby02f11752006-12-08 02:39:28 -08001609 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610#endif
Jiri Slabyebafeef2007-10-18 03:06:20 -07001611 tty_wakeup(tty);
Jiri Slaby7fa57a02007-10-22 20:45:13 -07001612ztxdone:
Jiri Slaby02f11752006-12-08 02:39:28 -08001613 /* Update tx_put */
1614 cy_writel(&buf_ctrl->tx_put, tx_put);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616}
1617
Jiri Slaby02f11752006-12-08 02:39:28 -08001618static void cyz_handle_cmd(struct cyclades_card *cinfo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619{
Jiri Slaby02f11752006-12-08 02:39:28 -08001620 struct tty_struct *tty;
1621 struct cyclades_port *info;
Jiri Slabyad39c302007-05-08 00:35:49 -07001622 static struct FIRM_ID __iomem *firm_id;
1623 static struct ZFW_CTRL __iomem *zfw_ctrl;
1624 static struct BOARD_CTRL __iomem *board_ctrl;
1625 static struct CH_CTRL __iomem *ch_ctrl;
1626 static struct BUF_CTRL __iomem *buf_ctrl;
Klaus Kudielka1a86b5e2007-05-08 00:26:26 -07001627 __u32 channel;
1628 __u8 cmd;
1629 __u32 param;
1630 __u32 hw_ver, fw_ver;
Jiri Slaby02f11752006-12-08 02:39:28 -08001631 int special_count;
1632 int delta_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633
1634 firm_id = cinfo->base_addr + ID_ADDRESS;
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001635 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
Jiri Slaby02f11752006-12-08 02:39:28 -08001636 board_ctrl = &zfw_ctrl->board_ctrl;
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001637 fw_ver = readl(&board_ctrl->fw_version);
1638 hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
Jiri Slaby02f11752006-12-08 02:39:28 -08001639 mail_box_0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001640
Jiri Slaby02f11752006-12-08 02:39:28 -08001641 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1642 special_count = 0;
1643 delta_count = 0;
Jiri Slabydd025c02007-05-08 00:37:02 -07001644 info = &cinfo->ports[channel];
Alan Cox77451e52008-07-16 21:57:02 +01001645 tty = info->port.tty;
Alan Cox15ed6cc2008-04-30 00:53:55 -07001646 if (tty == NULL)
Jiri Slaby02f11752006-12-08 02:39:28 -08001647 continue;
Jiri Slabyf7429032007-05-08 00:36:59 -07001648
Jiri Slaby02f11752006-12-08 02:39:28 -08001649 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1650 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1651
1652 switch (cmd) {
1653 case C_CM_PR_ERROR:
1654 tty_insert_flip_char(tty, 0, TTY_PARITY);
1655 info->icount.rx++;
1656 special_count++;
1657 break;
1658 case C_CM_FR_ERROR:
1659 tty_insert_flip_char(tty, 0, TTY_FRAME);
1660 info->icount.rx++;
1661 special_count++;
1662 break;
1663 case C_CM_RXBRK:
1664 tty_insert_flip_char(tty, 0, TTY_BREAK);
1665 info->icount.rx++;
1666 special_count++;
1667 break;
1668 case C_CM_MDCD:
1669 info->icount.dcd++;
1670 delta_count++;
Alan Cox77451e52008-07-16 21:57:02 +01001671 if (info->port.flags & ASYNC_CHECK_CD) {
Jiri Slaby02f11752006-12-08 02:39:28 -08001672 if ((fw_ver > 241 ? ((u_long) param) :
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001673 readl(&ch_ctrl->rs_status)) &
Jiri Slaby02f11752006-12-08 02:39:28 -08001674 C_RS_DCD) {
Alan Cox77451e52008-07-16 21:57:02 +01001675 wake_up_interruptible(&info->port.open_wait);
Jiri Slaby02f11752006-12-08 02:39:28 -08001676 } else {
Alan Cox77451e52008-07-16 21:57:02 +01001677 tty_hangup(info->port.tty);
1678 wake_up_interruptible(&info->port.open_wait);
1679 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
Jiri Slaby02f11752006-12-08 02:39:28 -08001680 }
1681 }
1682 break;
1683 case C_CM_MCTS:
1684 info->icount.cts++;
1685 delta_count++;
1686 break;
1687 case C_CM_MRI:
1688 info->icount.rng++;
1689 delta_count++;
1690 break;
1691 case C_CM_MDSR:
1692 info->icount.dsr++;
1693 delta_count++;
1694 break;
1695#ifdef Z_WAKE
1696 case C_CM_IOCTLW:
Jiri Slabyebafeef2007-10-18 03:06:20 -07001697 complete(&info->shutdown_wait);
Jiri Slaby02f11752006-12-08 02:39:28 -08001698 break;
1699#endif
1700#ifdef CONFIG_CYZ_INTR
1701 case C_CM_RXHIWM:
1702 case C_CM_RXNNDT:
1703 case C_CM_INTBACK2:
1704 /* Reception Interrupt */
1705#ifdef CY_DEBUG_INTERRUPTS
Jiri Slaby21719192007-05-08 00:36:42 -07001706 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1707 "port %ld\n", info->card, channel);
Jiri Slaby02f11752006-12-08 02:39:28 -08001708#endif
Jiri Slaby65f76a82007-10-18 03:06:22 -07001709 cyz_handle_rx(info, buf_ctrl);
Jiri Slaby02f11752006-12-08 02:39:28 -08001710 break;
1711 case C_CM_TXBEMPTY:
1712 case C_CM_TXLOWWM:
1713 case C_CM_INTBACK:
1714 /* Transmission Interrupt */
1715#ifdef CY_DEBUG_INTERRUPTS
Jiri Slaby21719192007-05-08 00:36:42 -07001716 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1717 "port %ld\n", info->card, channel);
Jiri Slaby02f11752006-12-08 02:39:28 -08001718#endif
Jiri Slaby65f76a82007-10-18 03:06:22 -07001719 cyz_handle_tx(info, buf_ctrl);
Jiri Slaby02f11752006-12-08 02:39:28 -08001720 break;
1721#endif /* CONFIG_CYZ_INTR */
1722 case C_CM_FATAL:
1723 /* should do something with this !!! */
1724 break;
1725 default:
1726 break;
1727 }
1728 if (delta_count)
Jiri Slabyebafeef2007-10-18 03:06:20 -07001729 wake_up_interruptible(&info->delta_msr_wait);
Jiri Slaby02f11752006-12-08 02:39:28 -08001730 if (special_count)
1731 tty_schedule_flip(tty);
1732 }
1733}
1734
1735#ifdef CONFIG_CYZ_INTR
1736static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1737{
Jiri Slabyf7429032007-05-08 00:36:59 -07001738 struct cyclades_card *cinfo = dev_id;
Jiri Slaby02f11752006-12-08 02:39:28 -08001739
Jiri Slabyf7429032007-05-08 00:36:59 -07001740 if (unlikely(cinfo == NULL)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08001741#ifdef CY_DEBUG_INTERRUPTS
Alan Cox15ed6cc2008-04-30 00:53:55 -07001742 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",
1743 irq);
Jiri Slaby02f11752006-12-08 02:39:28 -08001744#endif
1745 return IRQ_NONE; /* spurious interrupt */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746 }
1747
Jiri Slabyf7429032007-05-08 00:36:59 -07001748 if (unlikely(!ISZLOADED(*cinfo))) {
Jiri Slaby02f11752006-12-08 02:39:28 -08001749#ifdef CY_DEBUG_INTERRUPTS
Jiri Slaby21719192007-05-08 00:36:42 -07001750 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1751 "(IRQ%d).\n", irq);
Jiri Slaby02f11752006-12-08 02:39:28 -08001752#endif
1753 return IRQ_NONE;
1754 }
1755
1756 /* Handle the interrupts */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001757 cyz_handle_cmd(cinfo);
1758
Jiri Slaby02f11752006-12-08 02:39:28 -08001759 return IRQ_HANDLED;
1760} /* cyz_interrupt */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761
Jiri Slaby02f11752006-12-08 02:39:28 -08001762static void cyz_rx_restart(unsigned long arg)
1763{
1764 struct cyclades_port *info = (struct cyclades_port *)arg;
Jiri Slaby875b2062007-05-08 00:36:49 -07001765 struct cyclades_card *card = info->card;
Jiri Slaby02f11752006-12-08 02:39:28 -08001766 int retval;
Jiri Slaby875b2062007-05-08 00:36:49 -07001767 __u32 channel = info->line - card->first_line;
Jiri Slaby02f11752006-12-08 02:39:28 -08001768 unsigned long flags;
1769
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07001770 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby875b2062007-05-08 00:36:49 -07001771 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
Jiri Slaby02f11752006-12-08 02:39:28 -08001772 if (retval != 0) {
Jiri Slaby21719192007-05-08 00:36:42 -07001773 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
Jiri Slaby02f11752006-12-08 02:39:28 -08001774 info->line, retval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775 }
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07001776 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08001777}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001778
Jiri Slaby02f11752006-12-08 02:39:28 -08001779#else /* CONFIG_CYZ_INTR */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780
Jiri Slaby02f11752006-12-08 02:39:28 -08001781static void cyz_poll(unsigned long arg)
1782{
1783 struct cyclades_card *cinfo;
1784 struct cyclades_port *info;
1785 struct tty_struct *tty;
Jiri Slabyc4923b42007-07-17 04:05:17 -07001786 struct FIRM_ID __iomem *firm_id;
1787 struct ZFW_CTRL __iomem *zfw_ctrl;
1788 struct BOARD_CTRL __iomem *board_ctrl;
Jiri Slabyc4923b42007-07-17 04:05:17 -07001789 struct BUF_CTRL __iomem *buf_ctrl;
Jiri Slabyb7050902007-05-08 00:35:48 -07001790 unsigned long expires = jiffies + HZ;
Jiri Slaby65f76a82007-10-18 03:06:22 -07001791 unsigned int port, card;
Jiri Slaby02f11752006-12-08 02:39:28 -08001792
Jiri Slaby02f11752006-12-08 02:39:28 -08001793 for (card = 0; card < NR_CARDS; card++) {
1794 cinfo = &cy_card[card];
1795
1796 if (!IS_CYC_Z(*cinfo))
1797 continue;
1798 if (!ISZLOADED(*cinfo))
1799 continue;
1800
1801 firm_id = cinfo->base_addr + ID_ADDRESS;
1802 zfw_ctrl = cinfo->base_addr +
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001803 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
Jiri Slaby02f11752006-12-08 02:39:28 -08001804 board_ctrl = &(zfw_ctrl->board_ctrl);
1805
1806 /* Skip first polling cycle to avoid racing conditions with the FW */
1807 if (!cinfo->intr_enabled) {
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001808 cinfo->nports = (int)readl(&board_ctrl->n_channel);
Jiri Slaby02f11752006-12-08 02:39:28 -08001809 cinfo->intr_enabled = 1;
1810 continue;
1811 }
1812
1813 cyz_handle_cmd(cinfo);
1814
1815 for (port = 0; port < cinfo->nports; port++) {
Jiri Slabydd025c02007-05-08 00:37:02 -07001816 info = &cinfo->ports[port];
Alan Cox77451e52008-07-16 21:57:02 +01001817 tty = info->port.tty;
Jiri Slaby02f11752006-12-08 02:39:28 -08001818 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1819
1820 if (!info->throttle)
Jiri Slaby65f76a82007-10-18 03:06:22 -07001821 cyz_handle_rx(info, buf_ctrl);
1822 cyz_handle_tx(info, buf_ctrl);
Jiri Slaby02f11752006-12-08 02:39:28 -08001823 }
1824 /* poll every 'cyz_polling_cycle' period */
Jiri Slabyb7050902007-05-08 00:35:48 -07001825 expires = jiffies + cyz_polling_cycle;
Jiri Slaby02f11752006-12-08 02:39:28 -08001826 }
Jiri Slabyb7050902007-05-08 00:35:48 -07001827 mod_timer(&cyz_timerlist, expires);
Jiri Slaby02f11752006-12-08 02:39:28 -08001828} /* cyz_poll */
1829
1830#endif /* CONFIG_CYZ_INTR */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831
1832/********** End of block of Cyclades-Z specific code *********/
1833/***********************************************************/
1834
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835/* This is called whenever a port becomes active;
1836 interrupts are enabled and DTR & RTS are turned on.
1837 */
Jiri Slaby02f11752006-12-08 02:39:28 -08001838static int startup(struct cyclades_port *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839{
Jiri Slaby875b2062007-05-08 00:36:49 -07001840 struct cyclades_card *card;
Jiri Slaby02f11752006-12-08 02:39:28 -08001841 unsigned long flags;
1842 int retval = 0;
1843 void __iomem *base_addr;
Jiri Slaby875b2062007-05-08 00:36:49 -07001844 int chip, channel, index;
Jiri Slaby02f11752006-12-08 02:39:28 -08001845 unsigned long page;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001846
Jiri Slaby02f11752006-12-08 02:39:28 -08001847 card = info->card;
Jiri Slaby875b2062007-05-08 00:36:49 -07001848 channel = info->line - card->first_line;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001849
Jiri Slaby02f11752006-12-08 02:39:28 -08001850 page = get_zeroed_page(GFP_KERNEL);
1851 if (!page)
1852 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001853
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07001854 spin_lock_irqsave(&card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001855
Alan Cox77451e52008-07-16 21:57:02 +01001856 if (info->port.flags & ASYNC_INITIALIZED) {
Jiri Slaby02f11752006-12-08 02:39:28 -08001857 free_page(page);
1858 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859 }
Jiri Slaby02f11752006-12-08 02:39:28 -08001860
1861 if (!info->type) {
Alan Cox77451e52008-07-16 21:57:02 +01001862 if (info->port.tty)
1863 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08001864 free_page(page);
1865 goto errout;
1866 }
1867
Alan Cox77451e52008-07-16 21:57:02 +01001868 if (info->port.xmit_buf)
Jiri Slaby02f11752006-12-08 02:39:28 -08001869 free_page(page);
1870 else
Alan Cox77451e52008-07-16 21:57:02 +01001871 info->port.xmit_buf = (unsigned char *)page;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001872
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07001873 spin_unlock_irqrestore(&card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001874
Jiri Slaby02f11752006-12-08 02:39:28 -08001875 set_line_char(info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001876
Jiri Slaby875b2062007-05-08 00:36:49 -07001877 if (!IS_CYC_Z(*card)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08001878 chip = channel >> 2;
1879 channel &= 0x03;
Jiri Slaby875b2062007-05-08 00:36:49 -07001880 index = card->bus_index;
1881 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001882
1883#ifdef CY_DEBUG_OPEN
Jiri Slaby21719192007-05-08 00:36:42 -07001884 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1885 "base_addr %p\n",
1886 card, chip, channel, base_addr);
Jiri Slaby02f11752006-12-08 02:39:28 -08001887#endif
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07001888 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08001889
1890 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1891
1892 cy_writeb(base_addr + (CyRTPR << index),
1893 (info->default_timeout ? info->default_timeout : 0x02));
1894 /* 10ms rx timeout */
1895
1896 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1897 index);
1898
1899 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1900 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1901 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1902
1903#ifdef CY_DEBUG_DTR
Jiri Slaby21719192007-05-08 00:36:42 -07001904 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1905 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001906 readb(base_addr + (CyMSVR1 << index)),
1907 readb(base_addr + (CyMSVR2 << index)));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908#endif
1909
Jiri Slaby02f11752006-12-08 02:39:28 -08001910 cy_writeb(base_addr + (CySRER << index),
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001911 readb(base_addr + (CySRER << index)) | CyRxData);
Alan Cox77451e52008-07-16 21:57:02 +01001912 info->port.flags |= ASYNC_INITIALIZED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001913
Alan Cox77451e52008-07-16 21:57:02 +01001914 if (info->port.tty)
1915 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08001916 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1917 info->breakon = info->breakoff = 0;
1918 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1919 info->idle_stats.in_use =
1920 info->idle_stats.recv_idle =
1921 info->idle_stats.xmit_idle = jiffies;
1922
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07001923 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08001924
1925 } else {
1926 struct FIRM_ID __iomem *firm_id;
1927 struct ZFW_CTRL __iomem *zfw_ctrl;
1928 struct BOARD_CTRL __iomem *board_ctrl;
1929 struct CH_CTRL __iomem *ch_ctrl;
Jiri Slaby02f11752006-12-08 02:39:28 -08001930
Jiri Slaby875b2062007-05-08 00:36:49 -07001931 base_addr = card->base_addr;
Jiri Slaby02f11752006-12-08 02:39:28 -08001932
1933 firm_id = base_addr + ID_ADDRESS;
Alan Cox15ed6cc2008-04-30 00:53:55 -07001934 if (!ISZLOADED(*card))
Jiri Slaby02f11752006-12-08 02:39:28 -08001935 return -ENODEV;
Jiri Slaby02f11752006-12-08 02:39:28 -08001936
Jiri Slaby875b2062007-05-08 00:36:49 -07001937 zfw_ctrl = card->base_addr +
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001938 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
Jiri Slaby02f11752006-12-08 02:39:28 -08001939 board_ctrl = &zfw_ctrl->board_ctrl;
1940 ch_ctrl = zfw_ctrl->ch_ctrl;
1941
1942#ifdef CY_DEBUG_OPEN
Jiri Slaby21719192007-05-08 00:36:42 -07001943 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1944 "base_addr %p\n", card, channel, base_addr);
Jiri Slaby02f11752006-12-08 02:39:28 -08001945#endif
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07001946 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08001947
1948 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001949#ifdef Z_WAKE
1950#ifdef CONFIG_CYZ_INTR
Jiri Slaby02f11752006-12-08 02:39:28 -08001951 cy_writel(&ch_ctrl[channel].intr_enable,
1952 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1953 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001954#else
Jiri Slaby02f11752006-12-08 02:39:28 -08001955 cy_writel(&ch_ctrl[channel].intr_enable,
1956 C_IN_IOCTLW | C_IN_MDCD);
1957#endif /* CONFIG_CYZ_INTR */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001958#else
1959#ifdef CONFIG_CYZ_INTR
Jiri Slaby02f11752006-12-08 02:39:28 -08001960 cy_writel(&ch_ctrl[channel].intr_enable,
1961 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1962 C_IN_RXNNDT | C_IN_MDCD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001963#else
Jiri Slaby02f11752006-12-08 02:39:28 -08001964 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
1965#endif /* CONFIG_CYZ_INTR */
1966#endif /* Z_WAKE */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001967
Jiri Slaby875b2062007-05-08 00:36:49 -07001968 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
Jiri Slaby02f11752006-12-08 02:39:28 -08001969 if (retval != 0) {
Jiri Slaby21719192007-05-08 00:36:42 -07001970 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1971 "%x\n", info->line, retval);
Jiri Slaby02f11752006-12-08 02:39:28 -08001972 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973
Jiri Slaby02f11752006-12-08 02:39:28 -08001974 /* Flush RX buffers before raising DTR and RTS */
Jiri Slaby875b2062007-05-08 00:36:49 -07001975 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
Jiri Slaby02f11752006-12-08 02:39:28 -08001976 if (retval != 0) {
Jiri Slaby21719192007-05-08 00:36:42 -07001977 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1978 "%x\n", info->line, retval);
Jiri Slaby02f11752006-12-08 02:39:28 -08001979 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001980
Jiri Slaby02f11752006-12-08 02:39:28 -08001981 /* set timeout !!! */
1982 /* set RTS and DTR !!! */
1983 cy_writel(&ch_ctrl[channel].rs_control,
Jiri Slabydb05c3b2007-05-08 00:35:46 -07001984 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
Jiri Slaby02f11752006-12-08 02:39:28 -08001985 C_RS_DTR);
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07001986 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
Jiri Slaby02f11752006-12-08 02:39:28 -08001987 if (retval != 0) {
Jiri Slaby21719192007-05-08 00:36:42 -07001988 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
1989 "%x\n", info->line, retval);
Jiri Slaby02f11752006-12-08 02:39:28 -08001990 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001991#ifdef CY_DEBUG_DTR
Jiri Slaby21719192007-05-08 00:36:42 -07001992 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001993#endif
1994
Jiri Slaby02f11752006-12-08 02:39:28 -08001995 /* enable send, recv, modem !!! */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996
Alan Cox77451e52008-07-16 21:57:02 +01001997 info->port.flags |= ASYNC_INITIALIZED;
1998 if (info->port.tty)
1999 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002000 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2001 info->breakon = info->breakoff = 0;
2002 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2003 info->idle_stats.in_use =
2004 info->idle_stats.recv_idle =
2005 info->idle_stats.xmit_idle = jiffies;
2006
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002007 spin_unlock_irqrestore(&card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002008 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002009
2010#ifdef CY_DEBUG_OPEN
Jiri Slaby21719192007-05-08 00:36:42 -07002011 printk(KERN_DEBUG "cyc startup done\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012#endif
2013 return 0;
2014
2015errout:
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002016 spin_unlock_irqrestore(&card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017 return retval;
Jiri Slaby02f11752006-12-08 02:39:28 -08002018} /* startup */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002019
Jiri Slaby02f11752006-12-08 02:39:28 -08002020static void start_xmit(struct cyclades_port *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002021{
Jiri Slaby875b2062007-05-08 00:36:49 -07002022 struct cyclades_card *card;
Jiri Slaby02f11752006-12-08 02:39:28 -08002023 unsigned long flags;
2024 void __iomem *base_addr;
Jiri Slaby875b2062007-05-08 00:36:49 -07002025 int chip, channel, index;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026
Jiri Slaby02f11752006-12-08 02:39:28 -08002027 card = info->card;
Jiri Slaby875b2062007-05-08 00:36:49 -07002028 channel = info->line - card->first_line;
2029 if (!IS_CYC_Z(*card)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08002030 chip = channel >> 2;
2031 channel &= 0x03;
Jiri Slaby875b2062007-05-08 00:36:49 -07002032 index = card->bus_index;
2033 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002035 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002036 cy_writeb(base_addr + (CyCAR << index), channel);
2037 cy_writeb(base_addr + (CySRER << index),
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002038 readb(base_addr + (CySRER << index)) | CyTxRdy);
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002039 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002040 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041#ifdef CONFIG_CYZ_INTR
Jiri Slaby02f11752006-12-08 02:39:28 -08002042 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002043
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002044 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby875b2062007-05-08 00:36:49 -07002045 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
Jiri Slaby02f11752006-12-08 02:39:28 -08002046 if (retval != 0) {
Jiri Slaby21719192007-05-08 00:36:42 -07002047 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2048 "%x\n", info->line, retval);
Jiri Slaby02f11752006-12-08 02:39:28 -08002049 }
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002050 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002051#else /* CONFIG_CYZ_INTR */
2052 /* Don't have to do anything at this time */
2053#endif /* CONFIG_CYZ_INTR */
2054 }
2055} /* start_xmit */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056
2057/*
2058 * This routine shuts down a serial port; interrupts are disabled,
2059 * and DTR is dropped if the hangup on close termio flag is on.
2060 */
Jiri Slaby02f11752006-12-08 02:39:28 -08002061static void shutdown(struct cyclades_port *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002062{
Jiri Slaby875b2062007-05-08 00:36:49 -07002063 struct cyclades_card *card;
Jiri Slaby02f11752006-12-08 02:39:28 -08002064 unsigned long flags;
2065 void __iomem *base_addr;
Jiri Slaby875b2062007-05-08 00:36:49 -07002066 int chip, channel, index;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002067
Alan Cox77451e52008-07-16 21:57:02 +01002068 if (!(info->port.flags & ASYNC_INITIALIZED))
Jiri Slaby02f11752006-12-08 02:39:28 -08002069 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002070
Jiri Slaby02f11752006-12-08 02:39:28 -08002071 card = info->card;
Jiri Slaby875b2062007-05-08 00:36:49 -07002072 channel = info->line - card->first_line;
2073 if (!IS_CYC_Z(*card)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08002074 chip = channel >> 2;
2075 channel &= 0x03;
Jiri Slaby875b2062007-05-08 00:36:49 -07002076 index = card->bus_index;
2077 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002078
2079#ifdef CY_DEBUG_OPEN
Jiri Slaby21719192007-05-08 00:36:42 -07002080 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2081 "channel %d, base_addr %p\n",
2082 card, chip, channel, base_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002083#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002085 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002086
2087 /* Clear delta_msr_wait queue to avoid mem leaks. */
2088 wake_up_interruptible(&info->delta_msr_wait);
2089
Alan Cox77451e52008-07-16 21:57:02 +01002090 if (info->port.xmit_buf) {
Jiri Slaby02f11752006-12-08 02:39:28 -08002091 unsigned char *temp;
Alan Cox77451e52008-07-16 21:57:02 +01002092 temp = info->port.xmit_buf;
2093 info->port.xmit_buf = NULL;
Jiri Slaby02f11752006-12-08 02:39:28 -08002094 free_page((unsigned long)temp);
2095 }
2096 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
Alan Cox77451e52008-07-16 21:57:02 +01002097 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08002098 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2099 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2100#ifdef CY_DEBUG_DTR
Jiri Slaby21719192007-05-08 00:36:42 -07002101 printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2102 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002103 readb(base_addr + (CyMSVR1 << index)),
2104 readb(base_addr + (CyMSVR2 << index)));
Jiri Slaby02f11752006-12-08 02:39:28 -08002105#endif
2106 }
2107 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2108 /* it may be appropriate to clear _XMIT at
2109 some later date (after testing)!!! */
2110
Alan Cox77451e52008-07-16 21:57:02 +01002111 if (info->port.tty)
2112 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2113 info->port.flags &= ~ASYNC_INITIALIZED;
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002114 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002115 } else {
2116 struct FIRM_ID __iomem *firm_id;
2117 struct ZFW_CTRL __iomem *zfw_ctrl;
2118 struct BOARD_CTRL __iomem *board_ctrl;
2119 struct CH_CTRL __iomem *ch_ctrl;
2120 int retval;
2121
Jiri Slaby875b2062007-05-08 00:36:49 -07002122 base_addr = card->base_addr;
Jiri Slaby02f11752006-12-08 02:39:28 -08002123#ifdef CY_DEBUG_OPEN
Jiri Slaby21719192007-05-08 00:36:42 -07002124 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2125 "base_addr %p\n", card, channel, base_addr);
Jiri Slaby02f11752006-12-08 02:39:28 -08002126#endif
2127
2128 firm_id = base_addr + ID_ADDRESS;
Alan Cox15ed6cc2008-04-30 00:53:55 -07002129 if (!ISZLOADED(*card))
Jiri Slaby02f11752006-12-08 02:39:28 -08002130 return;
Jiri Slaby02f11752006-12-08 02:39:28 -08002131
Jiri Slaby875b2062007-05-08 00:36:49 -07002132 zfw_ctrl = card->base_addr +
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002133 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
Jiri Slaby02f11752006-12-08 02:39:28 -08002134 board_ctrl = &zfw_ctrl->board_ctrl;
2135 ch_ctrl = zfw_ctrl->ch_ctrl;
2136
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002137 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002138
Alan Cox77451e52008-07-16 21:57:02 +01002139 if (info->port.xmit_buf) {
Jiri Slaby02f11752006-12-08 02:39:28 -08002140 unsigned char *temp;
Alan Cox77451e52008-07-16 21:57:02 +01002141 temp = info->port.xmit_buf;
2142 info->port.xmit_buf = NULL;
Jiri Slaby02f11752006-12-08 02:39:28 -08002143 free_page((unsigned long)temp);
2144 }
2145
Alan Cox77451e52008-07-16 21:57:02 +01002146 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08002147 cy_writel(&ch_ctrl[channel].rs_control,
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002148 (__u32)(readl(&ch_ctrl[channel].rs_control) &
Jiri Slaby02f11752006-12-08 02:39:28 -08002149 ~(C_RS_RTS | C_RS_DTR)));
Jiri Slaby875b2062007-05-08 00:36:49 -07002150 retval = cyz_issue_cmd(info->card, channel,
Jiri Slaby02f11752006-12-08 02:39:28 -08002151 C_CM_IOCTLM, 0L);
2152 if (retval != 0) {
Jiri Slaby21719192007-05-08 00:36:42 -07002153 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2154 "was %x\n", info->line, retval);
Jiri Slaby02f11752006-12-08 02:39:28 -08002155 }
2156#ifdef CY_DEBUG_DTR
Jiri Slaby21719192007-05-08 00:36:42 -07002157 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
Jiri Slaby02f11752006-12-08 02:39:28 -08002158#endif
2159 }
2160
Alan Cox77451e52008-07-16 21:57:02 +01002161 if (info->port.tty)
2162 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2163 info->port.flags &= ~ASYNC_INITIALIZED;
Jiri Slaby02f11752006-12-08 02:39:28 -08002164
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002165 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002166 }
2167
2168#ifdef CY_DEBUG_OPEN
Jiri Slaby21719192007-05-08 00:36:42 -07002169 printk(KERN_DEBUG "cyc shutdown done\n");
Jiri Slaby02f11752006-12-08 02:39:28 -08002170#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08002171} /* shutdown */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002172
2173/*
2174 * ------------------------------------------------------------
2175 * cy_open() and friends
2176 * ------------------------------------------------------------
2177 */
2178
2179static int
Jiri Slaby02f11752006-12-08 02:39:28 -08002180block_til_ready(struct tty_struct *tty, struct file *filp,
2181 struct cyclades_port *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002182{
Jiri Slaby02f11752006-12-08 02:39:28 -08002183 DECLARE_WAITQUEUE(wait, current);
2184 struct cyclades_card *cinfo;
2185 unsigned long flags;
2186 int chip, channel, index;
2187 int retval;
2188 void __iomem *base_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002189
Jiri Slaby875b2062007-05-08 00:36:49 -07002190 cinfo = info->card;
Jiri Slaby02f11752006-12-08 02:39:28 -08002191 channel = info->line - cinfo->first_line;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002192
Jiri Slaby02f11752006-12-08 02:39:28 -08002193 /*
2194 * If the device is in the middle of being closed, then block
2195 * until it's done, and then try again.
2196 */
Alan Cox77451e52008-07-16 21:57:02 +01002197 if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
2198 wait_event_interruptible(info->port.close_wait,
2199 !(info->port.flags & ASYNC_CLOSING));
2200 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
Jiri Slaby02f11752006-12-08 02:39:28 -08002201 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002202
Jiri Slaby02f11752006-12-08 02:39:28 -08002203 /*
2204 * If non-blocking mode is set, then make the check up front
2205 * and then exit.
2206 */
Alan Cox15ed6cc2008-04-30 00:53:55 -07002207 if ((filp->f_flags & O_NONBLOCK) ||
2208 (tty->flags & (1 << TTY_IO_ERROR))) {
Alan Cox77451e52008-07-16 21:57:02 +01002209 info->port.flags |= ASYNC_NORMAL_ACTIVE;
Jiri Slaby02f11752006-12-08 02:39:28 -08002210 return 0;
2211 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002212
Jiri Slaby02f11752006-12-08 02:39:28 -08002213 /*
2214 * Block waiting for the carrier detect and the line to become
2215 * free (i.e., not in use by the callout). While we are in
Alan Cox77451e52008-07-16 21:57:02 +01002216 * this loop, info->port.count is dropped by one, so that
Jiri Slaby02f11752006-12-08 02:39:28 -08002217 * cy_close() knows when to free things. We restore it upon
2218 * exit, either normal or abnormal.
2219 */
2220 retval = 0;
Alan Cox77451e52008-07-16 21:57:02 +01002221 add_wait_queue(&info->port.open_wait, &wait);
Jiri Slaby02f11752006-12-08 02:39:28 -08002222#ifdef CY_DEBUG_OPEN
Jiri Slaby21719192007-05-08 00:36:42 -07002223 printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
Alan Cox77451e52008-07-16 21:57:02 +01002224 "count = %d\n", info->line, info->port.count);
Jiri Slaby02f11752006-12-08 02:39:28 -08002225#endif
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002226 spin_lock_irqsave(&cinfo->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002227 if (!tty_hung_up_p(filp))
Alan Cox77451e52008-07-16 21:57:02 +01002228 info->port.count--;
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002229 spin_unlock_irqrestore(&cinfo->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002230#ifdef CY_DEBUG_COUNT
Jiri Slaby21719192007-05-08 00:36:42 -07002231 printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
Alan Cox77451e52008-07-16 21:57:02 +01002232 "%d\n", current->pid, info->port.count);
Jiri Slaby02f11752006-12-08 02:39:28 -08002233#endif
Alan Cox77451e52008-07-16 21:57:02 +01002234 info->port.blocked_open++;
Jiri Slaby02f11752006-12-08 02:39:28 -08002235
2236 if (!IS_CYC_Z(*cinfo)) {
2237 chip = channel >> 2;
2238 channel &= 0x03;
2239 index = cinfo->bus_index;
2240 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2241
2242 while (1) {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002243 spin_lock_irqsave(&cinfo->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002244 if ((tty->termios->c_cflag & CBAUD)) {
2245 cy_writeb(base_addr + (CyCAR << index),
2246 (u_char) channel);
2247 cy_writeb(base_addr + (CyMSVR1 << index),
2248 CyRTS);
2249 cy_writeb(base_addr + (CyMSVR2 << index),
2250 CyDTR);
2251#ifdef CY_DEBUG_DTR
Jiri Slaby21719192007-05-08 00:36:42 -07002252 printk(KERN_DEBUG "cyc:block_til_ready raising "
2253 "DTR\n");
2254 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002255 readb(base_addr + (CyMSVR1 << index)),
2256 readb(base_addr + (CyMSVR2 << index)));
Jiri Slaby02f11752006-12-08 02:39:28 -08002257#endif
2258 }
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002259 spin_unlock_irqrestore(&cinfo->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002260
Jiri Slaby02f11752006-12-08 02:39:28 -08002261 set_current_state(TASK_INTERRUPTIBLE);
2262 if (tty_hung_up_p(filp) ||
Alan Cox77451e52008-07-16 21:57:02 +01002263 !(info->port.flags & ASYNC_INITIALIZED)) {
2264 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
Jiri Slaby02f11752006-12-08 02:39:28 -08002265 -EAGAIN : -ERESTARTSYS);
2266 break;
2267 }
2268
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002269 spin_lock_irqsave(&cinfo->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002270 cy_writeb(base_addr + (CyCAR << index),
2271 (u_char) channel);
Alan Cox77451e52008-07-16 21:57:02 +01002272 if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002273 (readb(base_addr +
Jiri Slaby02f11752006-12-08 02:39:28 -08002274 (CyMSVR1 << index)) & CyDCD))) {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002275 spin_unlock_irqrestore(&cinfo->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002276 break;
2277 }
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002278 spin_unlock_irqrestore(&cinfo->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002279
2280 if (signal_pending(current)) {
2281 retval = -ERESTARTSYS;
2282 break;
2283 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002284#ifdef CY_DEBUG_OPEN
Jiri Slaby21719192007-05-08 00:36:42 -07002285 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2286 "ttyC%d, count = %d\n",
Alan Cox77451e52008-07-16 21:57:02 +01002287 info->line, info->port.count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002288#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08002289 schedule();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002290 }
Jiri Slaby02f11752006-12-08 02:39:28 -08002291 } else {
2292 struct FIRM_ID __iomem *firm_id;
2293 struct ZFW_CTRL __iomem *zfw_ctrl;
2294 struct BOARD_CTRL __iomem *board_ctrl;
2295 struct CH_CTRL __iomem *ch_ctrl;
Jiri Slaby02f11752006-12-08 02:39:28 -08002296
2297 base_addr = cinfo->base_addr;
2298 firm_id = base_addr + ID_ADDRESS;
2299 if (!ISZLOADED(*cinfo)) {
Milind Arun Choudharycc0a8fb2007-05-08 00:30:52 -07002300 __set_current_state(TASK_RUNNING);
Alan Cox77451e52008-07-16 21:57:02 +01002301 remove_wait_queue(&info->port.open_wait, &wait);
Jiri Slaby02f11752006-12-08 02:39:28 -08002302 return -EINVAL;
2303 }
2304
Alan Cox15ed6cc2008-04-30 00:53:55 -07002305 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)
2306 & 0xfffff);
Jiri Slaby02f11752006-12-08 02:39:28 -08002307 board_ctrl = &zfw_ctrl->board_ctrl;
2308 ch_ctrl = zfw_ctrl->ch_ctrl;
2309
2310 while (1) {
2311 if ((tty->termios->c_cflag & CBAUD)) {
2312 cy_writel(&ch_ctrl[channel].rs_control,
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002313 readl(&ch_ctrl[channel].rs_control) |
2314 C_RS_RTS | C_RS_DTR);
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002315 retval = cyz_issue_cmd(cinfo,
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002316 channel, C_CM_IOCTLM, 0L);
Jiri Slaby02f11752006-12-08 02:39:28 -08002317 if (retval != 0) {
Jiri Slaby21719192007-05-08 00:36:42 -07002318 printk(KERN_ERR "cyc:block_til_ready "
2319 "retval on ttyC%d was %x\n",
Jiri Slaby02f11752006-12-08 02:39:28 -08002320 info->line, retval);
2321 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002322#ifdef CY_DEBUG_DTR
Jiri Slaby21719192007-05-08 00:36:42 -07002323 printk(KERN_DEBUG "cyc:block_til_ready raising "
2324 "Z DTR\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002325#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08002326 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002327
Jiri Slaby02f11752006-12-08 02:39:28 -08002328 set_current_state(TASK_INTERRUPTIBLE);
2329 if (tty_hung_up_p(filp) ||
Alan Cox77451e52008-07-16 21:57:02 +01002330 !(info->port.flags & ASYNC_INITIALIZED)) {
2331 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
Jiri Slaby02f11752006-12-08 02:39:28 -08002332 -EAGAIN : -ERESTARTSYS);
2333 break;
2334 }
Alan Cox77451e52008-07-16 21:57:02 +01002335 if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002336 (readl(&ch_ctrl[channel].rs_status) &
Jiri Slaby02f11752006-12-08 02:39:28 -08002337 C_RS_DCD))) {
2338 break;
2339 }
2340 if (signal_pending(current)) {
2341 retval = -ERESTARTSYS;
2342 break;
2343 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002344#ifdef CY_DEBUG_OPEN
Jiri Slaby21719192007-05-08 00:36:42 -07002345 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2346 "ttyC%d, count = %d\n",
Alan Cox77451e52008-07-16 21:57:02 +01002347 info->line, info->port.count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002348#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08002349 schedule();
2350 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002351 }
Milind Arun Choudharycc0a8fb2007-05-08 00:30:52 -07002352 __set_current_state(TASK_RUNNING);
Alan Cox77451e52008-07-16 21:57:02 +01002353 remove_wait_queue(&info->port.open_wait, &wait);
Jiri Slaby02f11752006-12-08 02:39:28 -08002354 if (!tty_hung_up_p(filp)) {
Alan Cox77451e52008-07-16 21:57:02 +01002355 info->port.count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002356#ifdef CY_DEBUG_COUNT
Jiri Slaby21719192007-05-08 00:36:42 -07002357 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
Alan Cox77451e52008-07-16 21:57:02 +01002358 "count to %d\n", current->pid, info->port.count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002359#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08002360 }
Alan Cox77451e52008-07-16 21:57:02 +01002361 info->port.blocked_open--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002362#ifdef CY_DEBUG_OPEN
Jiri Slaby21719192007-05-08 00:36:42 -07002363 printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
Alan Cox77451e52008-07-16 21:57:02 +01002364 "count = %d\n", info->line, info->port.count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002365#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08002366 if (retval)
2367 return retval;
Alan Cox77451e52008-07-16 21:57:02 +01002368 info->port.flags |= ASYNC_NORMAL_ACTIVE;
Jiri Slaby02f11752006-12-08 02:39:28 -08002369 return 0;
2370} /* block_til_ready */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002371
2372/*
2373 * This routine is called whenever a serial port is opened. It
2374 * performs the serial-specific initialization for the tty structure.
2375 */
Jiri Slaby02f11752006-12-08 02:39:28 -08002376static int cy_open(struct tty_struct *tty, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002377{
Jiri Slaby02f11752006-12-08 02:39:28 -08002378 struct cyclades_port *info;
Jiri Slaby65f76a82007-10-18 03:06:22 -07002379 unsigned int i, line;
2380 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002381
Jiri Slaby02f11752006-12-08 02:39:28 -08002382 line = tty->index;
Alan Cox15ed6cc2008-04-30 00:53:55 -07002383 if (tty->index < 0 || NR_PORTS <= line)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002384 return -ENODEV;
Alan Cox15ed6cc2008-04-30 00:53:55 -07002385
Jiri Slabydd025c02007-05-08 00:37:02 -07002386 for (i = 0; i < NR_CARDS; i++)
2387 if (line < cy_card[i].first_line + cy_card[i].nports &&
2388 line >= cy_card[i].first_line)
2389 break;
2390 if (i >= NR_CARDS)
2391 return -ENODEV;
2392 info = &cy_card[i].ports[line - cy_card[i].first_line];
Alan Cox15ed6cc2008-04-30 00:53:55 -07002393 if (info->line < 0)
Jiri Slaby02f11752006-12-08 02:39:28 -08002394 return -ENODEV;
Jiri Slaby02f11752006-12-08 02:39:28 -08002395
2396 /* If the card's firmware hasn't been loaded,
2397 treat it as absent from the system. This
2398 will make the user pay attention.
2399 */
Jiri Slaby875b2062007-05-08 00:36:49 -07002400 if (IS_CYC_Z(*info->card)) {
2401 struct cyclades_card *cinfo = info->card;
Jiri Slaby02f11752006-12-08 02:39:28 -08002402 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2403
2404 if (!ISZLOADED(*cinfo)) {
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002405 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
Jiri Slaby02f11752006-12-08 02:39:28 -08002406 (cinfo->ctl_addr))->mail_box_0)) &&
2407 Z_FPGA_CHECK(*cinfo)) &&
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002408 (ZFIRM_HLT == readl(
Jiri Slaby02f11752006-12-08 02:39:28 -08002409 &firm_id->signature))) {
Jiri Slaby21719192007-05-08 00:36:42 -07002410 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2411 "need an external power supply for "
2412 "this number of ports.\nFirmware "
2413 "halted.\n");
Jiri Slaby02f11752006-12-08 02:39:28 -08002414 } else {
Jiri Slaby21719192007-05-08 00:36:42 -07002415 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2416 "yet loaded\n");
Jiri Slaby02f11752006-12-08 02:39:28 -08002417 }
2418 return -ENODEV;
2419 }
2420#ifdef CONFIG_CYZ_INTR
2421 else {
2422 /* In case this Z board is operating in interrupt mode, its
2423 interrupts should be enabled as soon as the first open
2424 happens to one of its ports. */
2425 if (!cinfo->intr_enabled) {
2426 struct ZFW_CTRL __iomem *zfw_ctrl;
2427 struct BOARD_CTRL __iomem *board_ctrl;
2428
2429 zfw_ctrl = cinfo->base_addr +
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002430 (readl(&firm_id->zfwctrl_addr) &
2431 0xfffff);
Jiri Slaby02f11752006-12-08 02:39:28 -08002432
2433 board_ctrl = &zfw_ctrl->board_ctrl;
2434
2435 /* Enable interrupts on the PLX chip */
2436 cy_writew(cinfo->ctl_addr + 0x68,
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002437 readw(cinfo->ctl_addr + 0x68) | 0x0900);
Jiri Slaby02f11752006-12-08 02:39:28 -08002438 /* Enable interrupts on the FW */
2439 retval = cyz_issue_cmd(cinfo, 0,
2440 C_CM_IRQ_ENBL, 0L);
2441 if (retval != 0) {
Jiri Slaby21719192007-05-08 00:36:42 -07002442 printk(KERN_ERR "cyc:IRQ enable retval "
2443 "was %x\n", retval);
Jiri Slaby02f11752006-12-08 02:39:28 -08002444 }
2445 cinfo->nports =
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002446 (int)readl(&board_ctrl->n_channel);
Jiri Slaby02f11752006-12-08 02:39:28 -08002447 cinfo->intr_enabled = 1;
2448 }
2449 }
2450#endif /* CONFIG_CYZ_INTR */
2451 /* Make sure this Z port really exists in hardware */
2452 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2453 return -ENODEV;
2454 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002455#ifdef CY_DEBUG_OTHER
Jiri Slaby21719192007-05-08 00:36:42 -07002456 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002457#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08002458 tty->driver_data = info;
Alan Cox77451e52008-07-16 21:57:02 +01002459 info->port.tty = tty;
Alan Cox15ed6cc2008-04-30 00:53:55 -07002460 if (serial_paranoia_check(info, tty->name, "cy_open"))
Jiri Slaby02f11752006-12-08 02:39:28 -08002461 return -ENODEV;
Alan Cox15ed6cc2008-04-30 00:53:55 -07002462
Linus Torvalds1da177e2005-04-16 15:20:36 -07002463#ifdef CY_DEBUG_OPEN
Jiri Slaby21719192007-05-08 00:36:42 -07002464 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
Alan Cox77451e52008-07-16 21:57:02 +01002465 info->port.count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002466#endif
Alan Cox77451e52008-07-16 21:57:02 +01002467 info->port.count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002468#ifdef CY_DEBUG_COUNT
Jiri Slaby21719192007-05-08 00:36:42 -07002469 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
Alan Cox77451e52008-07-16 21:57:02 +01002470 current->pid, info->port.count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002471#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002472
Jiri Slaby02f11752006-12-08 02:39:28 -08002473 /*
2474 * If the port is the middle of closing, bail out now
2475 */
Alan Cox77451e52008-07-16 21:57:02 +01002476 if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
2477 wait_event_interruptible(info->port.close_wait,
2478 !(info->port.flags & ASYNC_CLOSING));
2479 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
Jiri Slaby02f11752006-12-08 02:39:28 -08002480 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002481
Jiri Slaby02f11752006-12-08 02:39:28 -08002482 /*
2483 * Start up serial port
2484 */
2485 retval = startup(info);
Alan Cox15ed6cc2008-04-30 00:53:55 -07002486 if (retval)
Jiri Slaby02f11752006-12-08 02:39:28 -08002487 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002488
Jiri Slaby02f11752006-12-08 02:39:28 -08002489 retval = block_til_ready(tty, filp, info);
2490 if (retval) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002491#ifdef CY_DEBUG_OPEN
Jiri Slaby21719192007-05-08 00:36:42 -07002492 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2493 "with %d\n", retval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002494#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08002495 return retval;
2496 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002497
Jiri Slaby02f11752006-12-08 02:39:28 -08002498 info->throttle = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002499
2500#ifdef CY_DEBUG_OPEN
Jiri Slaby21719192007-05-08 00:36:42 -07002501 printk(KERN_DEBUG "cyc:cy_open done\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002502#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08002503 return 0;
2504} /* cy_open */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002505
2506/*
2507 * cy_wait_until_sent() --- wait until the transmitter is empty
2508 */
Jiri Slaby02f11752006-12-08 02:39:28 -08002509static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002510{
Jiri Slaby875b2062007-05-08 00:36:49 -07002511 struct cyclades_card *card;
Jiri Slabycab9bdd2007-05-08 00:35:51 -07002512 struct cyclades_port *info = tty->driver_data;
Jiri Slaby02f11752006-12-08 02:39:28 -08002513 void __iomem *base_addr;
Jiri Slaby875b2062007-05-08 00:36:49 -07002514 int chip, channel, index;
Jiri Slaby02f11752006-12-08 02:39:28 -08002515 unsigned long orig_jiffies;
2516 int char_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002517
Jiri Slaby02f11752006-12-08 02:39:28 -08002518 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2519 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002520
Jiri Slaby02f11752006-12-08 02:39:28 -08002521 if (info->xmit_fifo_size == 0)
2522 return; /* Just in case.... */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002523
Jiri Slaby02f11752006-12-08 02:39:28 -08002524 orig_jiffies = jiffies;
Alan Cox978e5952008-04-30 00:53:59 -07002525 lock_kernel();
Jiri Slaby02f11752006-12-08 02:39:28 -08002526 /*
2527 * Set the check interval to be 1/5 of the estimated time to
2528 * send a single character, and make it at least 1. The check
2529 * interval should also be less than the timeout.
2530 *
2531 * Note: we have to use pretty tight timings here to satisfy
2532 * the NIST-PCTS.
2533 */
2534 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2535 char_time = char_time / 5;
2536 if (char_time <= 0)
2537 char_time = 1;
2538 if (timeout < 0)
2539 timeout = 0;
2540 if (timeout)
2541 char_time = min(char_time, timeout);
2542 /*
2543 * If the transmitter hasn't cleared in twice the approximate
2544 * amount of time to send the entire FIFO, it probably won't
2545 * ever clear. This assumes the UART isn't doing flow
2546 * control, which is currently the case. Hence, if it ever
2547 * takes longer than info->timeout, this is probably due to a
2548 * UART bug of some kind. So, we clamp the timeout parameter at
2549 * 2*info->timeout.
2550 */
2551 if (!timeout || timeout > 2 * info->timeout)
2552 timeout = 2 * info->timeout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002553#ifdef CY_DEBUG_WAIT_UNTIL_SENT
Jiri Slaby21719192007-05-08 00:36:42 -07002554 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2555 timeout, char_time, jiffies);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002556#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08002557 card = info->card;
Jiri Slaby875b2062007-05-08 00:36:49 -07002558 channel = (info->line) - (card->first_line);
2559 if (!IS_CYC_Z(*card)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08002560 chip = channel >> 2;
2561 channel &= 0x03;
Jiri Slaby875b2062007-05-08 00:36:49 -07002562 index = card->bus_index;
2563 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002564 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002565#ifdef CY_DEBUG_WAIT_UNTIL_SENT
Jiri Slaby21719192007-05-08 00:36:42 -07002566 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002567#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08002568 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2569 break;
2570 if (timeout && time_after(jiffies, orig_jiffies +
2571 timeout))
2572 break;
2573 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002574 }
Jiri Slaby02f11752006-12-08 02:39:28 -08002575 /* Run one more char cycle */
2576 msleep_interruptible(jiffies_to_msecs(char_time * 5));
Alan Cox978e5952008-04-30 00:53:59 -07002577 unlock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002578#ifdef CY_DEBUG_WAIT_UNTIL_SENT
Jiri Slaby21719192007-05-08 00:36:42 -07002579 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002580#endif
2581}
2582
Alan Cox978e5952008-04-30 00:53:59 -07002583static void cy_flush_buffer(struct tty_struct *tty)
2584{
2585 struct cyclades_port *info = tty->driver_data;
2586 struct cyclades_card *card;
2587 int channel, retval;
2588 unsigned long flags;
2589
2590#ifdef CY_DEBUG_IO
2591 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
2592#endif
2593
2594 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
2595 return;
2596
2597 card = info->card;
2598 channel = info->line - card->first_line;
2599
2600 spin_lock_irqsave(&card->card_lock, flags);
2601 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2602 spin_unlock_irqrestore(&card->card_lock, flags);
2603
2604 if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board
2605 buffers as well */
2606 spin_lock_irqsave(&card->card_lock, flags);
2607 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
2608 if (retval != 0) {
2609 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
2610 "was %x\n", info->line, retval);
2611 }
2612 spin_unlock_irqrestore(&card->card_lock, flags);
2613 }
2614 tty_wakeup(tty);
2615} /* cy_flush_buffer */
2616
2617
Linus Torvalds1da177e2005-04-16 15:20:36 -07002618/*
2619 * This routine is called when a particular tty device is closed.
2620 */
Jiri Slaby02f11752006-12-08 02:39:28 -08002621static void cy_close(struct tty_struct *tty, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002622{
Jiri Slabycab9bdd2007-05-08 00:35:51 -07002623 struct cyclades_port *info = tty->driver_data;
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002624 struct cyclades_card *card;
Jiri Slaby02f11752006-12-08 02:39:28 -08002625 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002626
2627#ifdef CY_DEBUG_OTHER
Jiri Slaby21719192007-05-08 00:36:42 -07002628 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002629#endif
2630
Alan Cox15ed6cc2008-04-30 00:53:55 -07002631 if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
Jiri Slaby02f11752006-12-08 02:39:28 -08002632 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002633
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002634 card = info->card;
2635
2636 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002637 /* If the TTY is being hung up, nothing to do */
2638 if (tty_hung_up_p(filp)) {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002639 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002640 return;
2641 }
2642#ifdef CY_DEBUG_OPEN
Jiri Slaby21719192007-05-08 00:36:42 -07002643 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
Alan Cox77451e52008-07-16 21:57:02 +01002644 info->port.count);
Jiri Slaby02f11752006-12-08 02:39:28 -08002645#endif
Alan Cox77451e52008-07-16 21:57:02 +01002646 if ((tty->count == 1) && (info->port.count != 1)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08002647 /*
2648 * Uh, oh. tty->count is 1, which means that the tty
2649 * structure will be freed. Info->count should always
2650 * be one in these conditions. If it's greater than
2651 * one, we've got real problems, since it means the
2652 * serial port won't be shutdown.
2653 */
Jiri Slaby21719192007-05-08 00:36:42 -07002654 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
Alan Cox77451e52008-07-16 21:57:02 +01002655 "tty->count is 1, info->port.count is %d\n", info->port.count);
2656 info->port.count = 1;
Jiri Slaby02f11752006-12-08 02:39:28 -08002657 }
2658#ifdef CY_DEBUG_COUNT
Jiri Slaby21719192007-05-08 00:36:42 -07002659 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
Alan Cox77451e52008-07-16 21:57:02 +01002660 current->pid, info->port.count - 1);
Jiri Slaby02f11752006-12-08 02:39:28 -08002661#endif
Alan Cox77451e52008-07-16 21:57:02 +01002662 if (--info->port.count < 0) {
Jiri Slaby02f11752006-12-08 02:39:28 -08002663#ifdef CY_DEBUG_COUNT
Jiri Slaby21719192007-05-08 00:36:42 -07002664 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
Jiri Slaby02f11752006-12-08 02:39:28 -08002665#endif
Alan Cox77451e52008-07-16 21:57:02 +01002666 info->port.count = 0;
Jiri Slaby02f11752006-12-08 02:39:28 -08002667 }
Alan Cox77451e52008-07-16 21:57:02 +01002668 if (info->port.count) {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002669 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002670 return;
2671 }
Alan Cox77451e52008-07-16 21:57:02 +01002672 info->port.flags |= ASYNC_CLOSING;
Jiri Slaby02f11752006-12-08 02:39:28 -08002673
2674 /*
2675 * Now we wait for the transmit buffer to clear; and we notify
2676 * the line discipline to only process XON/XOFF characters.
2677 */
2678 tty->closing = 1;
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002679 spin_unlock_irqrestore(&card->card_lock, flags);
Alan Cox44b7d1b2008-07-16 21:57:18 +01002680 if (info->port.closing_wait != CY_CLOSING_WAIT_NONE)
2681 tty_wait_until_sent(tty, info->port.closing_wait);
Alan Cox15ed6cc2008-04-30 00:53:55 -07002682
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002683 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002684
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002685 if (!IS_CYC_Z(*card)) {
2686 int channel = info->line - card->first_line;
2687 int index = card->bus_index;
2688 void __iomem *base_addr = card->base_addr +
Jiri Slaby02f11752006-12-08 02:39:28 -08002689 (cy_chip_offset[channel >> 2] << index);
2690 /* Stop accepting input */
2691 channel &= 0x03;
2692 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2693 cy_writeb(base_addr + (CySRER << index),
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002694 readb(base_addr + (CySRER << index)) & ~CyRxData);
Alan Cox77451e52008-07-16 21:57:02 +01002695 if (info->port.flags & ASYNC_INITIALIZED) {
Alan Cox15ed6cc2008-04-30 00:53:55 -07002696 /* Waiting for on-board buffers to be empty before
2697 closing the port */
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002698 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002699 cy_wait_until_sent(tty, info->timeout);
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002700 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002701 }
2702 } else {
2703#ifdef Z_WAKE
Alan Cox15ed6cc2008-04-30 00:53:55 -07002704 /* Waiting for on-board buffers to be empty before closing
2705 the port */
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002706 void __iomem *base_addr = card->base_addr;
Jiri Slaby02f11752006-12-08 02:39:28 -08002707 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2708 struct ZFW_CTRL __iomem *zfw_ctrl =
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002709 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
Jiri Slaby02f11752006-12-08 02:39:28 -08002710 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002711 int channel = info->line - card->first_line;
Jiri Slaby02f11752006-12-08 02:39:28 -08002712 int retval;
2713
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002714 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002715 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
Jiri Slaby02f11752006-12-08 02:39:28 -08002716 if (retval != 0) {
Jiri Slaby21719192007-05-08 00:36:42 -07002717 printk(KERN_DEBUG "cyc:cy_close retval on "
2718 "ttyC%d was %x\n", info->line, retval);
Jiri Slaby02f11752006-12-08 02:39:28 -08002719 }
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002720 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby2c7fea92007-05-08 00:36:51 -07002721 wait_for_completion_interruptible(&info->shutdown_wait);
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002722 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002723 }
2724#endif
2725 }
2726
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002727 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002728 shutdown(info);
Alan Cox978e5952008-04-30 00:53:59 -07002729 cy_flush_buffer(tty);
Jiri Slaby02f11752006-12-08 02:39:28 -08002730 tty_ldisc_flush(tty);
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002731 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002732
2733 tty->closing = 0;
Alan Cox77451e52008-07-16 21:57:02 +01002734 info->port.tty = NULL;
2735 if (info->port.blocked_open) {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002736 spin_unlock_irqrestore(&card->card_lock, flags);
Alan Cox44b7d1b2008-07-16 21:57:18 +01002737 if (info->port.close_delay) {
Jiri Slaby02f11752006-12-08 02:39:28 -08002738 msleep_interruptible(jiffies_to_msecs
Alan Cox44b7d1b2008-07-16 21:57:18 +01002739 (info->port.close_delay));
Jiri Slaby02f11752006-12-08 02:39:28 -08002740 }
Alan Cox77451e52008-07-16 21:57:02 +01002741 wake_up_interruptible(&info->port.open_wait);
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002742 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002743 }
Alan Cox77451e52008-07-16 21:57:02 +01002744 info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2745 wake_up_interruptible(&info->port.close_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002746
2747#ifdef CY_DEBUG_OTHER
Jiri Slaby21719192007-05-08 00:36:42 -07002748 printk(KERN_DEBUG "cyc:cy_close done\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002749#endif
2750
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002751 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002752} /* cy_close */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002753
2754/* This routine gets called when tty_write has put something into
2755 * the write_queue. The characters may come from user space or
2756 * kernel space.
2757 *
2758 * This routine will return the number of characters actually
2759 * accepted for writing.
2760 *
2761 * If the port is not already transmitting stuff, start it off by
2762 * enabling interrupts. The interrupt service routine will then
2763 * ensure that the characters are sent.
2764 * If the port is already active, there is no need to kick it.
2765 *
2766 */
Jiri Slaby02f11752006-12-08 02:39:28 -08002767static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002768{
Jiri Slabycab9bdd2007-05-08 00:35:51 -07002769 struct cyclades_port *info = tty->driver_data;
Jiri Slaby02f11752006-12-08 02:39:28 -08002770 unsigned long flags;
2771 int c, ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002772
2773#ifdef CY_DEBUG_IO
Jiri Slaby21719192007-05-08 00:36:42 -07002774 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002775#endif
2776
Alan Cox15ed6cc2008-04-30 00:53:55 -07002777 if (serial_paranoia_check(info, tty->name, "cy_write"))
Jiri Slaby02f11752006-12-08 02:39:28 -08002778 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002779
Alan Cox77451e52008-07-16 21:57:02 +01002780 if (!info->port.xmit_buf)
Jiri Slaby02f11752006-12-08 02:39:28 -08002781 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002782
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002783 spin_lock_irqsave(&info->card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08002784 while (1) {
Harvey Harrison1a4e2352008-04-30 00:53:52 -07002785 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
2786 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002787
Jiri Slaby02f11752006-12-08 02:39:28 -08002788 if (c <= 0)
2789 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002790
Alan Cox77451e52008-07-16 21:57:02 +01002791 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
Jiri Slaby02f11752006-12-08 02:39:28 -08002792 info->xmit_head = (info->xmit_head + c) &
2793 (SERIAL_XMIT_SIZE - 1);
2794 info->xmit_cnt += c;
2795 buf += c;
2796 count -= c;
2797 ret += c;
2798 }
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002799 spin_unlock_irqrestore(&info->card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002800
Jiri Slaby02f11752006-12-08 02:39:28 -08002801 info->idle_stats.xmit_bytes += ret;
2802 info->idle_stats.xmit_idle = jiffies;
2803
Alan Cox15ed6cc2008-04-30 00:53:55 -07002804 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
Jiri Slaby02f11752006-12-08 02:39:28 -08002805 start_xmit(info);
Alan Cox15ed6cc2008-04-30 00:53:55 -07002806
Jiri Slaby02f11752006-12-08 02:39:28 -08002807 return ret;
2808} /* cy_write */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002809
2810/*
2811 * This routine is called by the kernel to write a single
2812 * character to the tty device. If the kernel uses this routine,
2813 * it must call the flush_chars() routine (if defined) when it is
2814 * done stuffing characters into the driver. If there is no room
2815 * in the queue, the character is ignored.
2816 */
Alan Cox76b25a52008-04-30 00:54:03 -07002817static int cy_put_char(struct tty_struct *tty, unsigned char ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002818{
Jiri Slabycab9bdd2007-05-08 00:35:51 -07002819 struct cyclades_port *info = tty->driver_data;
Jiri Slaby02f11752006-12-08 02:39:28 -08002820 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002821
2822#ifdef CY_DEBUG_IO
Jiri Slaby21719192007-05-08 00:36:42 -07002823 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002824#endif
2825
Jiri Slaby02f11752006-12-08 02:39:28 -08002826 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
Alan Cox76b25a52008-04-30 00:54:03 -07002827 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002828
Alan Cox77451e52008-07-16 21:57:02 +01002829 if (!info->port.xmit_buf)
Alan Cox76b25a52008-04-30 00:54:03 -07002830 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002831
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002832 spin_lock_irqsave(&info->card->card_lock, flags);
Jiri Slaby90cc3012006-12-08 02:39:31 -08002833 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002834 spin_unlock_irqrestore(&info->card->card_lock, flags);
Alan Cox76b25a52008-04-30 00:54:03 -07002835 return 0;
Jiri Slaby02f11752006-12-08 02:39:28 -08002836 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002837
Alan Cox77451e52008-07-16 21:57:02 +01002838 info->port.xmit_buf[info->xmit_head++] = ch;
Jiri Slaby02f11752006-12-08 02:39:28 -08002839 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2840 info->xmit_cnt++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002841 info->idle_stats.xmit_bytes++;
2842 info->idle_stats.xmit_idle = jiffies;
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07002843 spin_unlock_irqrestore(&info->card->card_lock, flags);
Alan Cox76b25a52008-04-30 00:54:03 -07002844 return 1;
Jiri Slaby02f11752006-12-08 02:39:28 -08002845} /* cy_put_char */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002846
2847/*
2848 * This routine is called by the kernel after it has written a
Alan Cox15ed6cc2008-04-30 00:53:55 -07002849 * series of characters to the tty device using put_char().
Linus Torvalds1da177e2005-04-16 15:20:36 -07002850 */
Jiri Slaby02f11752006-12-08 02:39:28 -08002851static void cy_flush_chars(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002852{
Jiri Slabycab9bdd2007-05-08 00:35:51 -07002853 struct cyclades_port *info = tty->driver_data;
Jiri Slaby02f11752006-12-08 02:39:28 -08002854
Linus Torvalds1da177e2005-04-16 15:20:36 -07002855#ifdef CY_DEBUG_IO
Jiri Slaby21719192007-05-08 00:36:42 -07002856 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002857#endif
2858
Jiri Slaby02f11752006-12-08 02:39:28 -08002859 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2860 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002861
Jiri Slaby02f11752006-12-08 02:39:28 -08002862 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
Alan Cox77451e52008-07-16 21:57:02 +01002863 !info->port.xmit_buf)
Jiri Slaby02f11752006-12-08 02:39:28 -08002864 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002865
Jiri Slaby02f11752006-12-08 02:39:28 -08002866 start_xmit(info);
2867} /* cy_flush_chars */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002868
2869/*
2870 * This routine returns the numbers of characters the tty driver
2871 * will accept for queuing to be written. This number is subject
2872 * to change as output buffers get emptied, or if the output flow
2873 * control is activated.
2874 */
Jiri Slaby02f11752006-12-08 02:39:28 -08002875static int cy_write_room(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002876{
Jiri Slabycab9bdd2007-05-08 00:35:51 -07002877 struct cyclades_port *info = tty->driver_data;
Jiri Slaby02f11752006-12-08 02:39:28 -08002878 int ret;
2879
Linus Torvalds1da177e2005-04-16 15:20:36 -07002880#ifdef CY_DEBUG_IO
Jiri Slaby21719192007-05-08 00:36:42 -07002881 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002882#endif
2883
Jiri Slaby02f11752006-12-08 02:39:28 -08002884 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2885 return 0;
2886 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2887 if (ret < 0)
2888 ret = 0;
2889 return ret;
2890} /* cy_write_room */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002891
Jiri Slaby02f11752006-12-08 02:39:28 -08002892static int cy_chars_in_buffer(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002893{
Jiri Slaby875b2062007-05-08 00:36:49 -07002894 struct cyclades_card *card;
Jiri Slabycab9bdd2007-05-08 00:35:51 -07002895 struct cyclades_port *info = tty->driver_data;
Jiri Slaby875b2062007-05-08 00:36:49 -07002896 int channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002897
Jiri Slaby02f11752006-12-08 02:39:28 -08002898 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2899 return 0;
2900
2901 card = info->card;
Jiri Slaby875b2062007-05-08 00:36:49 -07002902 channel = (info->line) - (card->first_line);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002903
2904#ifdef Z_EXT_CHARS_IN_BUFFER
Jiri Slaby02f11752006-12-08 02:39:28 -08002905 if (!IS_CYC_Z(cy_card[card])) {
2906#endif /* Z_EXT_CHARS_IN_BUFFER */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002907#ifdef CY_DEBUG_IO
Jiri Slaby21719192007-05-08 00:36:42 -07002908 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2909 info->line, info->xmit_cnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002910#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08002911 return info->xmit_cnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002912#ifdef Z_EXT_CHARS_IN_BUFFER
Jiri Slaby02f11752006-12-08 02:39:28 -08002913 } else {
Jiri Slabyad39c302007-05-08 00:35:49 -07002914 static struct FIRM_ID *firm_id;
2915 static struct ZFW_CTRL *zfw_ctrl;
2916 static struct CH_CTRL *ch_ctrl;
2917 static struct BUF_CTRL *buf_ctrl;
Jiri Slaby02f11752006-12-08 02:39:28 -08002918 int char_count;
Jiri Slabyad39c302007-05-08 00:35:49 -07002919 __u32 tx_put, tx_get, tx_bufsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002920
Alan Cox978e5952008-04-30 00:53:59 -07002921 lock_kernel();
Jiri Slaby875b2062007-05-08 00:36:49 -07002922 firm_id = card->base_addr + ID_ADDRESS;
2923 zfw_ctrl = card->base_addr +
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002924 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
Jiri Slaby02f11752006-12-08 02:39:28 -08002925 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2926 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002927
Jiri Slabydb05c3b2007-05-08 00:35:46 -07002928 tx_get = readl(&buf_ctrl->tx_get);
2929 tx_put = readl(&buf_ctrl->tx_put);
2930 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
Jiri Slaby02f11752006-12-08 02:39:28 -08002931 if (tx_put >= tx_get)
2932 char_count = tx_put - tx_get;
2933 else
2934 char_count = tx_put - tx_get + tx_bufsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002935#ifdef CY_DEBUG_IO
Jiri Slaby21719192007-05-08 00:36:42 -07002936 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2937 info->line, info->xmit_cnt + char_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002938#endif
Alan Cox978e5952008-04-30 00:53:59 -07002939 unlock_kernel();
Jiri Slaby096dcfc2006-12-08 02:39:30 -08002940 return info->xmit_cnt + char_count;
Jiri Slaby02f11752006-12-08 02:39:28 -08002941 }
2942#endif /* Z_EXT_CHARS_IN_BUFFER */
2943} /* cy_chars_in_buffer */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002944
2945/*
2946 * ------------------------------------------------------------
2947 * cy_ioctl() and friends
2948 * ------------------------------------------------------------
2949 */
2950
Klaus Kudielka1a86b5e2007-05-08 00:26:26 -07002951static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002952{
Jiri Slaby02f11752006-12-08 02:39:28 -08002953 int co, co_val, bpr;
Klaus Kudielka1a86b5e2007-05-08 00:26:26 -07002954 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
Jiri Slaby02f11752006-12-08 02:39:28 -08002955 25000000);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002956
Jiri Slaby02f11752006-12-08 02:39:28 -08002957 if (baud == 0) {
2958 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2959 return;
2960 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002961
Jiri Slaby02f11752006-12-08 02:39:28 -08002962 /* determine which prescaler to use */
2963 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2964 if (cy_clock / co_val / baud > 63)
2965 break;
2966 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002967
Jiri Slaby02f11752006-12-08 02:39:28 -08002968 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2969 if (bpr > 255)
2970 bpr = 255;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002971
Jiri Slaby02f11752006-12-08 02:39:28 -08002972 info->tbpr = info->rbpr = bpr;
2973 info->tco = info->rco = co;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002974}
2975
2976/*
2977 * This routine finds or computes the various line characteristics.
2978 * It used to be called config_setup
2979 */
Jiri Slaby02f11752006-12-08 02:39:28 -08002980static void set_line_char(struct cyclades_port *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002981{
Jiri Slaby875b2062007-05-08 00:36:49 -07002982 struct cyclades_card *card;
Jiri Slaby02f11752006-12-08 02:39:28 -08002983 unsigned long flags;
2984 void __iomem *base_addr;
Jiri Slaby875b2062007-05-08 00:36:49 -07002985 int chip, channel, index;
Jiri Slaby02f11752006-12-08 02:39:28 -08002986 unsigned cflag, iflag;
2987 unsigned short chip_number;
2988 int baud, baud_rate = 0;
2989 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002990
Alan Cox77451e52008-07-16 21:57:02 +01002991 if (!info->port.tty || !info->port.tty->termios)
Jiri Slaby02f11752006-12-08 02:39:28 -08002992 return;
Alan Cox15ed6cc2008-04-30 00:53:55 -07002993
2994 if (info->line == -1)
Jiri Slaby02f11752006-12-08 02:39:28 -08002995 return;
Alan Cox15ed6cc2008-04-30 00:53:55 -07002996
Alan Cox77451e52008-07-16 21:57:02 +01002997 cflag = info->port.tty->termios->c_cflag;
2998 iflag = info->port.tty->termios->c_iflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002999
Jiri Slaby02f11752006-12-08 02:39:28 -08003000 /*
3001 * Set up the tty->alt_speed kludge
3002 */
Alan Cox77451e52008-07-16 21:57:02 +01003003 if (info->port.tty) {
3004 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3005 info->port.tty->alt_speed = 57600;
3006 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3007 info->port.tty->alt_speed = 115200;
3008 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3009 info->port.tty->alt_speed = 230400;
3010 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3011 info->port.tty->alt_speed = 460800;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003012 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003013
Jiri Slaby02f11752006-12-08 02:39:28 -08003014 card = info->card;
Jiri Slaby875b2062007-05-08 00:36:49 -07003015 channel = info->line - card->first_line;
Jiri Slaby02f11752006-12-08 02:39:28 -08003016 chip_number = channel / 4;
3017
Jiri Slaby875b2062007-05-08 00:36:49 -07003018 if (!IS_CYC_Z(*card)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08003019
Jiri Slaby875b2062007-05-08 00:36:49 -07003020 index = card->bus_index;
Jiri Slaby02f11752006-12-08 02:39:28 -08003021
3022 /* baud rate */
Alan Cox77451e52008-07-16 21:57:02 +01003023 baud = tty_get_baud_rate(info->port.tty);
3024 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
Jiri Slaby02f11752006-12-08 02:39:28 -08003025 ASYNC_SPD_CUST) {
3026 if (info->custom_divisor)
3027 baud_rate = info->baud / info->custom_divisor;
3028 else
3029 baud_rate = info->baud;
3030 } else if (baud > CD1400_MAX_SPEED) {
3031 baud = CD1400_MAX_SPEED;
3032 }
3033 /* find the baud index */
3034 for (i = 0; i < 20; i++) {
Alan Cox15ed6cc2008-04-30 00:53:55 -07003035 if (baud == baud_table[i])
Jiri Slaby02f11752006-12-08 02:39:28 -08003036 break;
Jiri Slaby02f11752006-12-08 02:39:28 -08003037 }
Alan Cox15ed6cc2008-04-30 00:53:55 -07003038 if (i == 20)
Jiri Slaby02f11752006-12-08 02:39:28 -08003039 i = 19; /* CD1400_MAX_SPEED */
Jiri Slaby02f11752006-12-08 02:39:28 -08003040
Alan Cox77451e52008-07-16 21:57:02 +01003041 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
Jiri Slaby02f11752006-12-08 02:39:28 -08003042 ASYNC_SPD_CUST) {
3043 cyy_baud_calc(info, baud_rate);
3044 } else {
3045 if (info->chip_rev >= CD1400_REV_J) {
3046 /* It is a CD1400 rev. J or later */
3047 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3048 info->tco = baud_co_60[i]; /* Tx CO */
3049 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3050 info->rco = baud_co_60[i]; /* Rx CO */
3051 } else {
3052 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3053 info->tco = baud_co_25[i]; /* Tx CO */
3054 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3055 info->rco = baud_co_25[i]; /* Rx CO */
3056 }
3057 }
3058 if (baud_table[i] == 134) {
3059 /* get it right for 134.5 baud */
3060 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3061 2;
Alan Cox77451e52008-07-16 21:57:02 +01003062 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
Jiri Slaby02f11752006-12-08 02:39:28 -08003063 ASYNC_SPD_CUST) {
3064 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3065 baud_rate) + 2;
3066 } else if (baud_table[i]) {
3067 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3068 baud_table[i]) + 2;
3069 /* this needs to be propagated into the card info */
3070 } else {
3071 info->timeout = 0;
3072 }
3073 /* By tradition (is it a standard?) a baud rate of zero
3074 implies the line should be/has been closed. A bit
3075 later in this routine such a test is performed. */
3076
3077 /* byte size and parity */
3078 info->cor5 = 0;
3079 info->cor4 = 0;
3080 /* receive threshold */
3081 info->cor3 = (info->default_threshold ?
3082 info->default_threshold : baud_cor3[i]);
3083 info->cor2 = CyETC;
3084 switch (cflag & CSIZE) {
3085 case CS5:
3086 info->cor1 = Cy_5_BITS;
3087 break;
3088 case CS6:
3089 info->cor1 = Cy_6_BITS;
3090 break;
3091 case CS7:
3092 info->cor1 = Cy_7_BITS;
3093 break;
3094 case CS8:
3095 info->cor1 = Cy_8_BITS;
3096 break;
3097 }
Alan Cox15ed6cc2008-04-30 00:53:55 -07003098 if (cflag & CSTOPB)
Jiri Slaby02f11752006-12-08 02:39:28 -08003099 info->cor1 |= Cy_2_STOP;
Alan Cox15ed6cc2008-04-30 00:53:55 -07003100
Jiri Slaby02f11752006-12-08 02:39:28 -08003101 if (cflag & PARENB) {
Alan Cox15ed6cc2008-04-30 00:53:55 -07003102 if (cflag & PARODD)
Jiri Slaby02f11752006-12-08 02:39:28 -08003103 info->cor1 |= CyPARITY_O;
Alan Cox15ed6cc2008-04-30 00:53:55 -07003104 else
Jiri Slaby02f11752006-12-08 02:39:28 -08003105 info->cor1 |= CyPARITY_E;
Alan Cox15ed6cc2008-04-30 00:53:55 -07003106 } else
Jiri Slaby02f11752006-12-08 02:39:28 -08003107 info->cor1 |= CyPARITY_NONE;
Jiri Slaby02f11752006-12-08 02:39:28 -08003108
3109 /* CTS flow control flag */
3110 if (cflag & CRTSCTS) {
Alan Cox77451e52008-07-16 21:57:02 +01003111 info->port.flags |= ASYNC_CTS_FLOW;
Jiri Slaby02f11752006-12-08 02:39:28 -08003112 info->cor2 |= CyCtsAE;
3113 } else {
Alan Cox77451e52008-07-16 21:57:02 +01003114 info->port.flags &= ~ASYNC_CTS_FLOW;
Jiri Slaby02f11752006-12-08 02:39:28 -08003115 info->cor2 &= ~CyCtsAE;
3116 }
3117 if (cflag & CLOCAL)
Alan Cox77451e52008-07-16 21:57:02 +01003118 info->port.flags &= ~ASYNC_CHECK_CD;
Jiri Slaby02f11752006-12-08 02:39:28 -08003119 else
Alan Cox77451e52008-07-16 21:57:02 +01003120 info->port.flags |= ASYNC_CHECK_CD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003121
3122 /***********************************************
3123 The hardware option, CyRtsAO, presents RTS when
3124 the chip has characters to send. Since most modems
3125 use RTS as reverse (inbound) flow control, this
3126 option is not used. If inbound flow control is
3127 necessary, DTR can be programmed to provide the
3128 appropriate signals for use with a non-standard
3129 cable. Contact Marcio Saito for details.
3130 ***********************************************/
3131
Jiri Slaby02f11752006-12-08 02:39:28 -08003132 chip = channel >> 2;
3133 channel &= 0x03;
Jiri Slaby875b2062007-05-08 00:36:49 -07003134 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003135
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003136 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003137 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003138
Jiri Slaby02f11752006-12-08 02:39:28 -08003139 /* tx and rx baud rate */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003140
Jiri Slaby02f11752006-12-08 02:39:28 -08003141 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3142 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3143 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3144 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003145
Jiri Slaby02f11752006-12-08 02:39:28 -08003146 /* set line characteristics according configuration */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003147
Jiri Slaby02f11752006-12-08 02:39:28 -08003148 cy_writeb(base_addr + (CySCHR1 << index),
Alan Cox77451e52008-07-16 21:57:02 +01003149 START_CHAR(info->port.tty));
3150 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->port.tty));
Jiri Slaby02f11752006-12-08 02:39:28 -08003151 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3152 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3153 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3154 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3155 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003156
Jiri Slaby02f11752006-12-08 02:39:28 -08003157 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3158 CyCOR3ch, index);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003159
Alan Cox15ed6cc2008-04-30 00:53:55 -07003160 /* !!! Is this needed? */
3161 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
Jiri Slaby02f11752006-12-08 02:39:28 -08003162 cy_writeb(base_addr + (CyRTPR << index),
3163 (info->default_timeout ? info->default_timeout : 0x02));
3164 /* 10ms rx timeout */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003165
Alan Cox77451e52008-07-16 21:57:02 +01003166 if (C_CLOCAL(info->port.tty)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08003167 /* without modem intr */
3168 cy_writeb(base_addr + (CySRER << index),
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003169 readb(base_addr + (CySRER << index)) | CyMdmCh);
Jiri Slaby02f11752006-12-08 02:39:28 -08003170 /* act on 1->0 modem transitions */
3171 if ((cflag & CRTSCTS) && info->rflow) {
3172 cy_writeb(base_addr + (CyMCOR1 << index),
3173 (CyCTS | rflow_thr[i]));
3174 } else {
3175 cy_writeb(base_addr + (CyMCOR1 << index),
3176 CyCTS);
3177 }
3178 /* act on 0->1 modem transitions */
3179 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003180 } else {
Jiri Slaby02f11752006-12-08 02:39:28 -08003181 /* without modem intr */
3182 cy_writeb(base_addr + (CySRER << index),
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003183 readb(base_addr +
Jiri Slaby02f11752006-12-08 02:39:28 -08003184 (CySRER << index)) | CyMdmCh);
3185 /* act on 1->0 modem transitions */
3186 if ((cflag & CRTSCTS) && info->rflow) {
3187 cy_writeb(base_addr + (CyMCOR1 << index),
3188 (CyDSR | CyCTS | CyRI | CyDCD |
3189 rflow_thr[i]));
3190 } else {
3191 cy_writeb(base_addr + (CyMCOR1 << index),
3192 CyDSR | CyCTS | CyRI | CyDCD);
3193 }
3194 /* act on 0->1 modem transitions */
3195 cy_writeb(base_addr + (CyMCOR2 << index),
3196 CyDSR | CyCTS | CyRI | CyDCD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003197 }
Jiri Slaby02f11752006-12-08 02:39:28 -08003198
3199 if (i == 0) { /* baud rate is zero, turn off line */
3200 if (info->rtsdtr_inv) {
3201 cy_writeb(base_addr + (CyMSVR1 << index),
3202 ~CyRTS);
3203 } else {
3204 cy_writeb(base_addr + (CyMSVR2 << index),
3205 ~CyDTR);
3206 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003207#ifdef CY_DEBUG_DTR
Jiri Slaby21719192007-05-08 00:36:42 -07003208 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3209 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003210 readb(base_addr + (CyMSVR1 << index)),
3211 readb(base_addr + (CyMSVR2 << index)));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003212#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08003213 } else {
3214 if (info->rtsdtr_inv) {
3215 cy_writeb(base_addr + (CyMSVR1 << index),
3216 CyRTS);
3217 } else {
3218 cy_writeb(base_addr + (CyMSVR2 << index),
3219 CyDTR);
3220 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003221#ifdef CY_DEBUG_DTR
Jiri Slaby21719192007-05-08 00:36:42 -07003222 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3223 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003224 readb(base_addr + (CyMSVR1 << index)),
3225 readb(base_addr + (CyMSVR2 << index)));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003226#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08003227 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003228
Alan Cox77451e52008-07-16 21:57:02 +01003229 if (info->port.tty)
3230 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003231 spin_unlock_irqrestore(&card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003232
Linus Torvalds1da177e2005-04-16 15:20:36 -07003233 } else {
Jiri Slaby02f11752006-12-08 02:39:28 -08003234 struct FIRM_ID __iomem *firm_id;
3235 struct ZFW_CTRL __iomem *zfw_ctrl;
3236 struct BOARD_CTRL __iomem *board_ctrl;
3237 struct CH_CTRL __iomem *ch_ctrl;
3238 struct BUF_CTRL __iomem *buf_ctrl;
Klaus Kudielka1a86b5e2007-05-08 00:26:26 -07003239 __u32 sw_flow;
Jiri Slaby02f11752006-12-08 02:39:28 -08003240 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003241
Jiri Slaby875b2062007-05-08 00:36:49 -07003242 firm_id = card->base_addr + ID_ADDRESS;
Alan Cox15ed6cc2008-04-30 00:53:55 -07003243 if (!ISZLOADED(*card))
Jiri Slaby02f11752006-12-08 02:39:28 -08003244 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003245
Jiri Slaby875b2062007-05-08 00:36:49 -07003246 zfw_ctrl = card->base_addr +
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003247 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
Jiri Slaby02f11752006-12-08 02:39:28 -08003248 board_ctrl = &zfw_ctrl->board_ctrl;
3249 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3250 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003251
Jiri Slaby02f11752006-12-08 02:39:28 -08003252 /* baud rate */
Alan Cox77451e52008-07-16 21:57:02 +01003253 baud = tty_get_baud_rate(info->port.tty);
3254 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
Jiri Slaby02f11752006-12-08 02:39:28 -08003255 ASYNC_SPD_CUST) {
3256 if (info->custom_divisor)
3257 baud_rate = info->baud / info->custom_divisor;
3258 else
3259 baud_rate = info->baud;
3260 } else if (baud > CYZ_MAX_SPEED) {
3261 baud = CYZ_MAX_SPEED;
3262 }
3263 cy_writel(&ch_ctrl->comm_baud, baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003264
Jiri Slaby02f11752006-12-08 02:39:28 -08003265 if (baud == 134) {
3266 /* get it right for 134.5 baud */
3267 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3268 2;
Alan Cox77451e52008-07-16 21:57:02 +01003269 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
Jiri Slaby02f11752006-12-08 02:39:28 -08003270 ASYNC_SPD_CUST) {
3271 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3272 baud_rate) + 2;
3273 } else if (baud) {
3274 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3275 baud) + 2;
3276 /* this needs to be propagated into the card info */
3277 } else {
3278 info->timeout = 0;
3279 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003280
Jiri Slaby02f11752006-12-08 02:39:28 -08003281 /* byte size and parity */
3282 switch (cflag & CSIZE) {
3283 case CS5:
3284 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3285 break;
3286 case CS6:
3287 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3288 break;
3289 case CS7:
3290 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3291 break;
3292 case CS8:
3293 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3294 break;
3295 }
3296 if (cflag & CSTOPB) {
3297 cy_writel(&ch_ctrl->comm_data_l,
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003298 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
Jiri Slaby02f11752006-12-08 02:39:28 -08003299 } else {
3300 cy_writel(&ch_ctrl->comm_data_l,
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003301 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
Jiri Slaby02f11752006-12-08 02:39:28 -08003302 }
3303 if (cflag & PARENB) {
Alan Cox15ed6cc2008-04-30 00:53:55 -07003304 if (cflag & PARODD)
Jiri Slaby02f11752006-12-08 02:39:28 -08003305 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
Alan Cox15ed6cc2008-04-30 00:53:55 -07003306 else
Jiri Slaby02f11752006-12-08 02:39:28 -08003307 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
Alan Cox15ed6cc2008-04-30 00:53:55 -07003308 } else
Jiri Slaby02f11752006-12-08 02:39:28 -08003309 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003310
Jiri Slaby02f11752006-12-08 02:39:28 -08003311 /* CTS flow control flag */
3312 if (cflag & CRTSCTS) {
3313 cy_writel(&ch_ctrl->hw_flow,
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003314 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
Jiri Slaby02f11752006-12-08 02:39:28 -08003315 } else {
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003316 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3317 ~(C_RS_CTS | C_RS_RTS));
Jiri Slaby02f11752006-12-08 02:39:28 -08003318 }
3319 /* As the HW flow control is done in firmware, the driver
3320 doesn't need to care about it */
Alan Cox77451e52008-07-16 21:57:02 +01003321 info->port.flags &= ~ASYNC_CTS_FLOW;
Jiri Slaby02f11752006-12-08 02:39:28 -08003322
3323 /* XON/XOFF/XANY flow control flags */
3324 sw_flow = 0;
3325 if (iflag & IXON) {
3326 sw_flow |= C_FL_OXX;
3327 if (iflag & IXANY)
3328 sw_flow |= C_FL_OIXANY;
3329 }
3330 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3331
Jiri Slaby875b2062007-05-08 00:36:49 -07003332 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
Jiri Slaby02f11752006-12-08 02:39:28 -08003333 if (retval != 0) {
Jiri Slaby21719192007-05-08 00:36:42 -07003334 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3335 "was %x\n", info->line, retval);
Jiri Slaby02f11752006-12-08 02:39:28 -08003336 }
3337
3338 /* CD sensitivity */
Alan Cox15ed6cc2008-04-30 00:53:55 -07003339 if (cflag & CLOCAL)
Alan Cox77451e52008-07-16 21:57:02 +01003340 info->port.flags &= ~ASYNC_CHECK_CD;
Alan Cox15ed6cc2008-04-30 00:53:55 -07003341 else
Alan Cox77451e52008-07-16 21:57:02 +01003342 info->port.flags |= ASYNC_CHECK_CD;
Jiri Slaby02f11752006-12-08 02:39:28 -08003343
3344 if (baud == 0) { /* baud rate is zero, turn off line */
3345 cy_writel(&ch_ctrl->rs_control,
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003346 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003347#ifdef CY_DEBUG_DTR
Jiri Slaby21719192007-05-08 00:36:42 -07003348 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003349#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08003350 } else {
3351 cy_writel(&ch_ctrl->rs_control,
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003352 readl(&ch_ctrl->rs_control) | C_RS_DTR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003353#ifdef CY_DEBUG_DTR
Jiri Slaby21719192007-05-08 00:36:42 -07003354 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003355#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08003356 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003357
Alan Cox15ed6cc2008-04-30 00:53:55 -07003358 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
Jiri Slaby02f11752006-12-08 02:39:28 -08003359 if (retval != 0) {
Jiri Slaby21719192007-05-08 00:36:42 -07003360 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3361 "was %x\n", info->line, retval);
Jiri Slaby02f11752006-12-08 02:39:28 -08003362 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003363
Alan Cox77451e52008-07-16 21:57:02 +01003364 if (info->port.tty)
3365 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003366 }
Jiri Slaby02f11752006-12-08 02:39:28 -08003367} /* set_line_char */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003368
3369static int
Jiri Slaby02f11752006-12-08 02:39:28 -08003370get_serial_info(struct cyclades_port *info,
Alan Cox15ed6cc2008-04-30 00:53:55 -07003371 struct serial_struct __user *retinfo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003372{
Jiri Slaby02f11752006-12-08 02:39:28 -08003373 struct serial_struct tmp;
Jiri Slaby875b2062007-05-08 00:36:49 -07003374 struct cyclades_card *cinfo = info->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003375
Jiri Slaby02f11752006-12-08 02:39:28 -08003376 if (!retinfo)
3377 return -EFAULT;
3378 memset(&tmp, 0, sizeof(tmp));
3379 tmp.type = info->type;
3380 tmp.line = info->line;
Jiri Slaby875b2062007-05-08 00:36:49 -07003381 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3382 cinfo->first_line;
Jiri Slaby02f11752006-12-08 02:39:28 -08003383 tmp.irq = cinfo->irq;
Alan Cox77451e52008-07-16 21:57:02 +01003384 tmp.flags = info->port.flags;
Alan Cox44b7d1b2008-07-16 21:57:18 +01003385 tmp.close_delay = info->port.close_delay;
3386 tmp.closing_wait = info->port.closing_wait;
Jiri Slaby02f11752006-12-08 02:39:28 -08003387 tmp.baud_base = info->baud;
3388 tmp.custom_divisor = info->custom_divisor;
3389 tmp.hub6 = 0; /*!!! */
3390 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3391} /* get_serial_info */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003392
3393static int
Jiri Slaby02f11752006-12-08 02:39:28 -08003394set_serial_info(struct cyclades_port *info,
Alan Cox15ed6cc2008-04-30 00:53:55 -07003395 struct serial_struct __user *new_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003396{
Jiri Slaby02f11752006-12-08 02:39:28 -08003397 struct serial_struct new_serial;
3398 struct cyclades_port old_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003399
Jiri Slaby02f11752006-12-08 02:39:28 -08003400 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3401 return -EFAULT;
3402 old_info = *info;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003403
Jiri Slaby02f11752006-12-08 02:39:28 -08003404 if (!capable(CAP_SYS_ADMIN)) {
Alan Cox44b7d1b2008-07-16 21:57:18 +01003405 if (new_serial.close_delay != info->port.close_delay ||
Jiri Slaby02f11752006-12-08 02:39:28 -08003406 new_serial.baud_base != info->baud ||
3407 (new_serial.flags & ASYNC_FLAGS &
3408 ~ASYNC_USR_MASK) !=
Alan Cox77451e52008-07-16 21:57:02 +01003409 (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
Jiri Slaby02f11752006-12-08 02:39:28 -08003410 return -EPERM;
Alan Cox77451e52008-07-16 21:57:02 +01003411 info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
Jiri Slaby02f11752006-12-08 02:39:28 -08003412 (new_serial.flags & ASYNC_USR_MASK);
3413 info->baud = new_serial.baud_base;
3414 info->custom_divisor = new_serial.custom_divisor;
3415 goto check_and_exit;
3416 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003417
Jiri Slaby02f11752006-12-08 02:39:28 -08003418 /*
3419 * OK, past this point, all the error checking has been done.
3420 * At this point, we start making changes.....
3421 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003422
Jiri Slaby02f11752006-12-08 02:39:28 -08003423 info->baud = new_serial.baud_base;
3424 info->custom_divisor = new_serial.custom_divisor;
Alan Cox77451e52008-07-16 21:57:02 +01003425 info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
Jiri Slaby02f11752006-12-08 02:39:28 -08003426 (new_serial.flags & ASYNC_FLAGS);
Alan Cox44b7d1b2008-07-16 21:57:18 +01003427 info->port.close_delay = new_serial.close_delay * HZ / 100;
3428 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003429
3430check_and_exit:
Alan Cox77451e52008-07-16 21:57:02 +01003431 if (info->port.flags & ASYNC_INITIALIZED) {
Jiri Slaby02f11752006-12-08 02:39:28 -08003432 set_line_char(info);
3433 return 0;
3434 } else {
3435 return startup(info);
3436 }
3437} /* set_serial_info */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003438
3439/*
3440 * get_lsr_info - get line status register info
3441 *
3442 * Purpose: Let user call ioctl() to get info when the UART physically
3443 * is emptied. On bus types like RS485, the transmitter must
3444 * release the bus after transmitting. This must be done when
3445 * the transmit shift register is empty, not be done when the
3446 * transmit holding register is empty. This functionality
3447 * allows an RS485 driver to be written in user space.
3448 */
Alan Cox15ed6cc2008-04-30 00:53:55 -07003449static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003450{
Jiri Slaby875b2062007-05-08 00:36:49 -07003451 struct cyclades_card *card;
3452 int chip, channel, index;
Jiri Slaby02f11752006-12-08 02:39:28 -08003453 unsigned char status;
3454 unsigned int result;
3455 unsigned long flags;
3456 void __iomem *base_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003457
Jiri Slaby02f11752006-12-08 02:39:28 -08003458 card = info->card;
Jiri Slaby875b2062007-05-08 00:36:49 -07003459 channel = (info->line) - (card->first_line);
3460 if (!IS_CYC_Z(*card)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08003461 chip = channel >> 2;
3462 channel &= 0x03;
Jiri Slaby875b2062007-05-08 00:36:49 -07003463 index = card->bus_index;
3464 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003465
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003466 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003467 status = readb(base_addr + (CySRER << index)) &
Jiri Slaby02f11752006-12-08 02:39:28 -08003468 (CyTxRdy | CyTxMpty);
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003469 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003470 result = (status ? 0 : TIOCSER_TEMT);
3471 } else {
3472 /* Not supported yet */
3473 return -EINVAL;
3474 }
3475 return put_user(result, (unsigned long __user *)value);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003476}
3477
Jiri Slaby02f11752006-12-08 02:39:28 -08003478static int cy_tiocmget(struct tty_struct *tty, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003479{
Jiri Slabycab9bdd2007-05-08 00:35:51 -07003480 struct cyclades_port *info = tty->driver_data;
Jiri Slaby875b2062007-05-08 00:36:49 -07003481 struct cyclades_card *card;
3482 int chip, channel, index;
Jiri Slaby02f11752006-12-08 02:39:28 -08003483 void __iomem *base_addr;
3484 unsigned long flags;
3485 unsigned char status;
3486 unsigned long lstatus;
3487 unsigned int result;
3488 struct FIRM_ID __iomem *firm_id;
3489 struct ZFW_CTRL __iomem *zfw_ctrl;
3490 struct BOARD_CTRL __iomem *board_ctrl;
3491 struct CH_CTRL __iomem *ch_ctrl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003492
Harvey Harrisonbf9d8922008-04-30 00:55:10 -07003493 if (serial_paranoia_check(info, tty->name, __func__))
Jiri Slaby02f11752006-12-08 02:39:28 -08003494 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003495
Alan Cox7b130c02008-04-30 00:53:16 -07003496 lock_kernel();
3497
Jiri Slaby02f11752006-12-08 02:39:28 -08003498 card = info->card;
Jiri Slaby875b2062007-05-08 00:36:49 -07003499 channel = info->line - card->first_line;
3500 if (!IS_CYC_Z(*card)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08003501 chip = channel >> 2;
3502 channel &= 0x03;
Jiri Slaby875b2062007-05-08 00:36:49 -07003503 index = card->bus_index;
3504 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003505
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003506 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003507 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003508 status = readb(base_addr + (CyMSVR1 << index));
3509 status |= readb(base_addr + (CyMSVR2 << index));
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003510 spin_unlock_irqrestore(&card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003511
Jiri Slaby02f11752006-12-08 02:39:28 -08003512 if (info->rtsdtr_inv) {
3513 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3514 ((status & CyDTR) ? TIOCM_RTS : 0);
3515 } else {
3516 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3517 ((status & CyDTR) ? TIOCM_DTR : 0);
3518 }
3519 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3520 ((status & CyRI) ? TIOCM_RNG : 0) |
3521 ((status & CyDSR) ? TIOCM_DSR : 0) |
3522 ((status & CyCTS) ? TIOCM_CTS : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003523 } else {
Jiri Slaby875b2062007-05-08 00:36:49 -07003524 base_addr = card->base_addr;
3525 firm_id = card->base_addr + ID_ADDRESS;
3526 if (ISZLOADED(*card)) {
3527 zfw_ctrl = card->base_addr +
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003528 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
Jiri Slaby02f11752006-12-08 02:39:28 -08003529 board_ctrl = &zfw_ctrl->board_ctrl;
3530 ch_ctrl = zfw_ctrl->ch_ctrl;
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003531 lstatus = readl(&ch_ctrl[channel].rs_status);
Jiri Slaby02f11752006-12-08 02:39:28 -08003532 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3533 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3534 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3535 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3536 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3537 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3538 } else {
3539 result = 0;
Alan Cox7b130c02008-04-30 00:53:16 -07003540 unlock_kernel();
Jiri Slaby02f11752006-12-08 02:39:28 -08003541 return -ENODEV;
3542 }
3543
Linus Torvalds1da177e2005-04-16 15:20:36 -07003544 }
Alan Cox7b130c02008-04-30 00:53:16 -07003545 unlock_kernel();
Jiri Slaby02f11752006-12-08 02:39:28 -08003546 return result;
3547} /* cy_tiomget */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003548
3549static int
3550cy_tiocmset(struct tty_struct *tty, struct file *file,
Jiri Slaby02f11752006-12-08 02:39:28 -08003551 unsigned int set, unsigned int clear)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003552{
Jiri Slabycab9bdd2007-05-08 00:35:51 -07003553 struct cyclades_port *info = tty->driver_data;
Jiri Slaby875b2062007-05-08 00:36:49 -07003554 struct cyclades_card *card;
3555 int chip, channel, index;
Jiri Slaby02f11752006-12-08 02:39:28 -08003556 void __iomem *base_addr;
3557 unsigned long flags;
3558 struct FIRM_ID __iomem *firm_id;
3559 struct ZFW_CTRL __iomem *zfw_ctrl;
3560 struct BOARD_CTRL __iomem *board_ctrl;
3561 struct CH_CTRL __iomem *ch_ctrl;
3562 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003563
Harvey Harrisonbf9d8922008-04-30 00:55:10 -07003564 if (serial_paranoia_check(info, tty->name, __func__))
Jiri Slaby02f11752006-12-08 02:39:28 -08003565 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003566
Jiri Slaby02f11752006-12-08 02:39:28 -08003567 card = info->card;
Jiri Slaby875b2062007-05-08 00:36:49 -07003568 channel = (info->line) - (card->first_line);
3569 if (!IS_CYC_Z(*card)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08003570 chip = channel >> 2;
3571 channel &= 0x03;
Jiri Slaby875b2062007-05-08 00:36:49 -07003572 index = card->bus_index;
3573 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003574
Jiri Slaby02f11752006-12-08 02:39:28 -08003575 if (set & TIOCM_RTS) {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003576 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003577 cy_writeb(base_addr + (CyCAR << index),
3578 (u_char) channel);
3579 if (info->rtsdtr_inv) {
3580 cy_writeb(base_addr + (CyMSVR2 << index),
3581 CyDTR);
3582 } else {
3583 cy_writeb(base_addr + (CyMSVR1 << index),
3584 CyRTS);
3585 }
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003586 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003587 }
3588 if (clear & TIOCM_RTS) {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003589 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003590 cy_writeb(base_addr + (CyCAR << index),
3591 (u_char) channel);
3592 if (info->rtsdtr_inv) {
3593 cy_writeb(base_addr + (CyMSVR2 << index),
3594 ~CyDTR);
3595 } else {
3596 cy_writeb(base_addr + (CyMSVR1 << index),
3597 ~CyRTS);
3598 }
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003599 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003600 }
3601 if (set & TIOCM_DTR) {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003602 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003603 cy_writeb(base_addr + (CyCAR << index),
3604 (u_char) channel);
3605 if (info->rtsdtr_inv) {
3606 cy_writeb(base_addr + (CyMSVR1 << index),
3607 CyRTS);
3608 } else {
3609 cy_writeb(base_addr + (CyMSVR2 << index),
3610 CyDTR);
3611 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003612#ifdef CY_DEBUG_DTR
Jiri Slaby21719192007-05-08 00:36:42 -07003613 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3614 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003615 readb(base_addr + (CyMSVR1 << index)),
3616 readb(base_addr + (CyMSVR2 << index)));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003617#endif
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003618 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003619 }
3620 if (clear & TIOCM_DTR) {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003621 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003622 cy_writeb(base_addr + (CyCAR << index),
3623 (u_char) channel);
3624 if (info->rtsdtr_inv) {
3625 cy_writeb(base_addr + (CyMSVR1 << index),
3626 ~CyRTS);
3627 } else {
3628 cy_writeb(base_addr + (CyMSVR2 << index),
3629 ~CyDTR);
3630 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003631
3632#ifdef CY_DEBUG_DTR
Jiri Slaby21719192007-05-08 00:36:42 -07003633 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3634 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003635 readb(base_addr + (CyMSVR1 << index)),
3636 readb(base_addr + (CyMSVR2 << index)));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003637#endif
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003638 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003639 }
3640 } else {
Jiri Slaby875b2062007-05-08 00:36:49 -07003641 base_addr = card->base_addr;
Jiri Slaby02f11752006-12-08 02:39:28 -08003642
Jiri Slaby875b2062007-05-08 00:36:49 -07003643 firm_id = card->base_addr + ID_ADDRESS;
3644 if (ISZLOADED(*card)) {
3645 zfw_ctrl = card->base_addr +
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003646 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
Jiri Slaby02f11752006-12-08 02:39:28 -08003647 board_ctrl = &zfw_ctrl->board_ctrl;
3648 ch_ctrl = zfw_ctrl->ch_ctrl;
3649
3650 if (set & TIOCM_RTS) {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003651 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003652 cy_writel(&ch_ctrl[channel].rs_control,
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003653 readl(&ch_ctrl[channel].rs_control) |
3654 C_RS_RTS);
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003655 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003656 }
3657 if (clear & TIOCM_RTS) {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003658 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003659 cy_writel(&ch_ctrl[channel].rs_control,
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003660 readl(&ch_ctrl[channel].rs_control) &
3661 ~C_RS_RTS);
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003662 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003663 }
3664 if (set & TIOCM_DTR) {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003665 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003666 cy_writel(&ch_ctrl[channel].rs_control,
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003667 readl(&ch_ctrl[channel].rs_control) |
3668 C_RS_DTR);
Jiri Slaby02f11752006-12-08 02:39:28 -08003669#ifdef CY_DEBUG_DTR
Jiri Slaby21719192007-05-08 00:36:42 -07003670 printk(KERN_DEBUG "cyc:set_modem_info raising "
3671 "Z DTR\n");
Jiri Slaby02f11752006-12-08 02:39:28 -08003672#endif
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003673 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003674 }
3675 if (clear & TIOCM_DTR) {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003676 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003677 cy_writel(&ch_ctrl[channel].rs_control,
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003678 readl(&ch_ctrl[channel].rs_control) &
3679 ~C_RS_DTR);
Jiri Slaby02f11752006-12-08 02:39:28 -08003680#ifdef CY_DEBUG_DTR
Jiri Slaby21719192007-05-08 00:36:42 -07003681 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3682 "Z DTR\n");
Jiri Slaby02f11752006-12-08 02:39:28 -08003683#endif
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003684 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003685 }
3686 } else {
3687 return -ENODEV;
3688 }
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003689 spin_lock_irqsave(&card->card_lock, flags);
3690 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
Jiri Slaby02f11752006-12-08 02:39:28 -08003691 if (retval != 0) {
Jiri Slaby21719192007-05-08 00:36:42 -07003692 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3693 "was %x\n", info->line, retval);
Jiri Slaby02f11752006-12-08 02:39:28 -08003694 }
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003695 spin_unlock_irqrestore(&card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003696 }
Jiri Slaby02f11752006-12-08 02:39:28 -08003697 return 0;
3698} /* cy_tiocmset */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003699
3700/*
3701 * cy_break() --- routine which turns the break handling on or off
3702 */
Jiri Slaby02f11752006-12-08 02:39:28 -08003703static void cy_break(struct tty_struct *tty, int break_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003704{
Jiri Slabycab9bdd2007-05-08 00:35:51 -07003705 struct cyclades_port *info = tty->driver_data;
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003706 struct cyclades_card *card;
Jiri Slaby02f11752006-12-08 02:39:28 -08003707 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003708
Jiri Slaby02f11752006-12-08 02:39:28 -08003709 if (serial_paranoia_check(info, tty->name, "cy_break"))
3710 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003711
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003712 card = info->card;
3713
3714 spin_lock_irqsave(&card->card_lock, flags);
3715 if (!IS_CYC_Z(*card)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08003716 /* Let the transmit ISR take care of this (since it
3717 requires stuffing characters into the output stream).
3718 */
3719 if (break_state == -1) {
3720 if (!info->breakon) {
3721 info->breakon = 1;
3722 if (!info->xmit_cnt) {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003723 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003724 start_xmit(info);
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003725 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003726 }
3727 }
3728 } else {
3729 if (!info->breakoff) {
3730 info->breakoff = 1;
3731 if (!info->xmit_cnt) {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003732 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003733 start_xmit(info);
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003734 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003735 }
3736 }
3737 }
3738 } else {
3739 int retval;
3740
3741 if (break_state == -1) {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003742 retval = cyz_issue_cmd(card,
3743 info->line - card->first_line,
Jiri Slaby02f11752006-12-08 02:39:28 -08003744 C_CM_SET_BREAK, 0L);
3745 if (retval != 0) {
Jiri Slaby21719192007-05-08 00:36:42 -07003746 printk(KERN_ERR "cyc:cy_break (set) retval on "
3747 "ttyC%d was %x\n", info->line, retval);
Jiri Slaby02f11752006-12-08 02:39:28 -08003748 }
3749 } else {
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003750 retval = cyz_issue_cmd(card,
3751 info->line - card->first_line,
Jiri Slaby02f11752006-12-08 02:39:28 -08003752 C_CM_CLR_BREAK, 0L);
3753 if (retval != 0) {
Jiri Slaby21719192007-05-08 00:36:42 -07003754 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3755 "on ttyC%d was %x\n", info->line,
3756 retval);
Jiri Slaby02f11752006-12-08 02:39:28 -08003757 }
3758 }
3759 }
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003760 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003761} /* cy_break */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003762
Alan Cox15ed6cc2008-04-30 00:53:55 -07003763static int get_mon_info(struct cyclades_port *info,
3764 struct cyclades_monitor __user *mon)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003765{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003766
Jiri Slaby02f11752006-12-08 02:39:28 -08003767 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3768 return -EFAULT;
3769 info->mon.int_count = 0;
3770 info->mon.char_count = 0;
3771 info->mon.char_max = 0;
3772 info->mon.char_last = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003773 return 0;
Jiri Slaby02f11752006-12-08 02:39:28 -08003774} /* get_mon_info */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003775
Jiri Slaby02f11752006-12-08 02:39:28 -08003776static int set_threshold(struct cyclades_port *info, unsigned long value)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003777{
Jiri Slaby875b2062007-05-08 00:36:49 -07003778 struct cyclades_card *card;
Jiri Slaby02f11752006-12-08 02:39:28 -08003779 void __iomem *base_addr;
Jiri Slaby875b2062007-05-08 00:36:49 -07003780 int channel, chip, index;
Jiri Slaby02f11752006-12-08 02:39:28 -08003781 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003782
Jiri Slaby02f11752006-12-08 02:39:28 -08003783 card = info->card;
Jiri Slaby875b2062007-05-08 00:36:49 -07003784 channel = info->line - card->first_line;
3785 if (!IS_CYC_Z(*card)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08003786 chip = channel >> 2;
3787 channel &= 0x03;
Jiri Slaby875b2062007-05-08 00:36:49 -07003788 index = card->bus_index;
Jiri Slaby02f11752006-12-08 02:39:28 -08003789 base_addr =
Jiri Slaby875b2062007-05-08 00:36:49 -07003790 card->base_addr + (cy_chip_offset[chip] << index);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003791
Jiri Slaby02f11752006-12-08 02:39:28 -08003792 info->cor3 &= ~CyREC_FIFO;
3793 info->cor3 |= value & CyREC_FIFO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003794
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003795 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003796 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3797 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003798 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003799 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003800 return 0;
Jiri Slaby02f11752006-12-08 02:39:28 -08003801} /* set_threshold */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003802
Alan Cox15ed6cc2008-04-30 00:53:55 -07003803static int get_threshold(struct cyclades_port *info,
3804 unsigned long __user *value)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003805{
Jiri Slaby875b2062007-05-08 00:36:49 -07003806 struct cyclades_card *card;
Jiri Slaby02f11752006-12-08 02:39:28 -08003807 void __iomem *base_addr;
Jiri Slaby875b2062007-05-08 00:36:49 -07003808 int channel, chip, index;
Jiri Slaby02f11752006-12-08 02:39:28 -08003809 unsigned long tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003810
Jiri Slaby02f11752006-12-08 02:39:28 -08003811 card = info->card;
Jiri Slaby875b2062007-05-08 00:36:49 -07003812 channel = info->line - card->first_line;
3813 if (!IS_CYC_Z(*card)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08003814 chip = channel >> 2;
3815 channel &= 0x03;
Jiri Slaby875b2062007-05-08 00:36:49 -07003816 index = card->bus_index;
3817 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
Jiri Slaby02f11752006-12-08 02:39:28 -08003818
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003819 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
Jiri Slaby02f11752006-12-08 02:39:28 -08003820 return put_user(tmp, value);
Jiri Slaby02f11752006-12-08 02:39:28 -08003821 }
Jiri Slabyf7429032007-05-08 00:36:59 -07003822 return 0;
Jiri Slaby02f11752006-12-08 02:39:28 -08003823} /* get_threshold */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003824
Alan Cox15ed6cc2008-04-30 00:53:55 -07003825static int set_default_threshold(struct cyclades_port *info,
3826 unsigned long value)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003827{
Jiri Slaby02f11752006-12-08 02:39:28 -08003828 info->default_threshold = value & 0x0f;
3829 return 0;
3830} /* set_default_threshold */
3831
Alan Cox15ed6cc2008-04-30 00:53:55 -07003832static int get_default_threshold(struct cyclades_port *info,
3833 unsigned long __user *value)
Jiri Slaby02f11752006-12-08 02:39:28 -08003834{
3835 return put_user(info->default_threshold, value);
3836} /* get_default_threshold */
3837
3838static int set_timeout(struct cyclades_port *info, unsigned long value)
3839{
Jiri Slaby875b2062007-05-08 00:36:49 -07003840 struct cyclades_card *card;
Jiri Slaby02f11752006-12-08 02:39:28 -08003841 void __iomem *base_addr;
Jiri Slaby875b2062007-05-08 00:36:49 -07003842 int channel, chip, index;
Jiri Slaby02f11752006-12-08 02:39:28 -08003843 unsigned long flags;
3844
3845 card = info->card;
Jiri Slaby875b2062007-05-08 00:36:49 -07003846 channel = info->line - card->first_line;
3847 if (!IS_CYC_Z(*card)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08003848 chip = channel >> 2;
3849 channel &= 0x03;
Jiri Slaby875b2062007-05-08 00:36:49 -07003850 index = card->bus_index;
3851 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
Jiri Slaby02f11752006-12-08 02:39:28 -08003852
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003853 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003854 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003855 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003856 }
3857 return 0;
3858} /* set_timeout */
3859
Alan Cox15ed6cc2008-04-30 00:53:55 -07003860static int get_timeout(struct cyclades_port *info,
3861 unsigned long __user *value)
Jiri Slaby02f11752006-12-08 02:39:28 -08003862{
Jiri Slaby875b2062007-05-08 00:36:49 -07003863 struct cyclades_card *card;
Jiri Slaby02f11752006-12-08 02:39:28 -08003864 void __iomem *base_addr;
Jiri Slaby875b2062007-05-08 00:36:49 -07003865 int channel, chip, index;
Jiri Slaby02f11752006-12-08 02:39:28 -08003866 unsigned long tmp;
3867
3868 card = info->card;
Jiri Slaby875b2062007-05-08 00:36:49 -07003869 channel = info->line - card->first_line;
3870 if (!IS_CYC_Z(*card)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08003871 chip = channel >> 2;
3872 channel &= 0x03;
Jiri Slaby875b2062007-05-08 00:36:49 -07003873 index = card->bus_index;
3874 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
Jiri Slaby02f11752006-12-08 02:39:28 -08003875
Jiri Slabydb05c3b2007-05-08 00:35:46 -07003876 tmp = readb(base_addr + (CyRTPR << index));
Jiri Slaby02f11752006-12-08 02:39:28 -08003877 return put_user(tmp, value);
Jiri Slaby02f11752006-12-08 02:39:28 -08003878 }
Jiri Slabyf7429032007-05-08 00:36:59 -07003879 return 0;
Jiri Slaby02f11752006-12-08 02:39:28 -08003880} /* get_timeout */
3881
3882static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3883{
3884 info->default_timeout = value & 0xff;
3885 return 0;
3886} /* set_default_timeout */
3887
Alan Cox15ed6cc2008-04-30 00:53:55 -07003888static int get_default_timeout(struct cyclades_port *info,
3889 unsigned long __user *value)
Jiri Slaby02f11752006-12-08 02:39:28 -08003890{
3891 return put_user(info->default_timeout, value);
3892} /* get_default_timeout */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003893
3894/*
3895 * This routine allows the tty driver to implement device-
3896 * specific ioctl's. If the ioctl number passed in cmd is
3897 * not recognized by the driver, it should return ENOIOCTLCMD.
3898 */
3899static int
Jiri Slaby02f11752006-12-08 02:39:28 -08003900cy_ioctl(struct tty_struct *tty, struct file *file,
3901 unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003902{
Jiri Slabycab9bdd2007-05-08 00:35:51 -07003903 struct cyclades_port *info = tty->driver_data;
Jiri Slaby02f11752006-12-08 02:39:28 -08003904 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3905 struct serial_icounter_struct __user *p_cuser; /* user space */
3906 int ret_val = 0;
3907 unsigned long flags;
3908 void __user *argp = (void __user *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003909
Jiri Slaby02f11752006-12-08 02:39:28 -08003910 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3911 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003912
3913#ifdef CY_DEBUG_OTHER
Jiri Slaby21719192007-05-08 00:36:42 -07003914 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3915 info->line, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003916#endif
Alan Cox7b130c02008-04-30 00:53:16 -07003917 lock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003918
Jiri Slaby02f11752006-12-08 02:39:28 -08003919 switch (cmd) {
3920 case CYGETMON:
3921 ret_val = get_mon_info(info, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003922 break;
Jiri Slaby02f11752006-12-08 02:39:28 -08003923 case CYGETTHRESH:
3924 ret_val = get_threshold(info, argp);
3925 break;
3926 case CYSETTHRESH:
3927 ret_val = set_threshold(info, arg);
3928 break;
3929 case CYGETDEFTHRESH:
3930 ret_val = get_default_threshold(info, argp);
3931 break;
3932 case CYSETDEFTHRESH:
3933 ret_val = set_default_threshold(info, arg);
3934 break;
3935 case CYGETTIMEOUT:
3936 ret_val = get_timeout(info, argp);
3937 break;
3938 case CYSETTIMEOUT:
3939 ret_val = set_timeout(info, arg);
3940 break;
3941 case CYGETDEFTIMEOUT:
3942 ret_val = get_default_timeout(info, argp);
3943 break;
3944 case CYSETDEFTIMEOUT:
3945 ret_val = set_default_timeout(info, arg);
3946 break;
3947 case CYSETRFLOW:
3948 info->rflow = (int)arg;
3949 ret_val = 0;
3950 break;
3951 case CYGETRFLOW:
3952 ret_val = info->rflow;
3953 break;
3954 case CYSETRTSDTR_INV:
3955 info->rtsdtr_inv = (int)arg;
3956 ret_val = 0;
3957 break;
3958 case CYGETRTSDTR_INV:
3959 ret_val = info->rtsdtr_inv;
3960 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003961 case CYGETCD1400VER:
Jiri Slaby02f11752006-12-08 02:39:28 -08003962 ret_val = info->chip_rev;
3963 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003964#ifndef CONFIG_CYZ_INTR
3965 case CYZSETPOLLCYCLE:
Jiri Slaby02f11752006-12-08 02:39:28 -08003966 cyz_polling_cycle = (arg * HZ) / 1000;
3967 ret_val = 0;
3968 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003969 case CYZGETPOLLCYCLE:
Jiri Slaby02f11752006-12-08 02:39:28 -08003970 ret_val = (cyz_polling_cycle * 1000) / HZ;
3971 break;
3972#endif /* CONFIG_CYZ_INTR */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003973 case CYSETWAIT:
Alan Cox44b7d1b2008-07-16 21:57:18 +01003974 info->port.closing_wait = (unsigned short)arg * HZ / 100;
Jiri Slaby02f11752006-12-08 02:39:28 -08003975 ret_val = 0;
3976 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003977 case CYGETWAIT:
Alan Cox44b7d1b2008-07-16 21:57:18 +01003978 ret_val = info->port.closing_wait / (HZ / 100);
Jiri Slaby02f11752006-12-08 02:39:28 -08003979 break;
3980 case TIOCGSERIAL:
3981 ret_val = get_serial_info(info, argp);
3982 break;
3983 case TIOCSSERIAL:
3984 ret_val = set_serial_info(info, argp);
3985 break;
3986 case TIOCSERGETLSR: /* Get line status register */
3987 ret_val = get_lsr_info(info, argp);
3988 break;
3989 /*
3990 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
3991 * - mask passed in arg for lines of interest
3992 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
3993 * Caller should use TIOCGICOUNT to see which one it was
3994 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003995 case TIOCMIWAIT:
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003996 spin_lock_irqsave(&info->card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08003997 /* note the counters on entry */
Jiri Slaby2c7fea92007-05-08 00:36:51 -07003998 cnow = info->icount;
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07003999 spin_unlock_irqrestore(&info->card->card_lock, flags);
Jiri Slaby2c7fea92007-05-08 00:36:51 -07004000 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
4001 cprev = cnow;
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07004002 spin_lock_irqsave(&info->card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08004003 cnow = info->icount; /* atomic copy */
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07004004 spin_unlock_irqrestore(&info->card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004005
Jiri Slaby2c7fea92007-05-08 00:36:51 -07004006 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4007 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4008 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4009 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4010 }));
4011 break;
Jiri Slaby02f11752006-12-08 02:39:28 -08004012
4013 /*
4014 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4015 * Return: write counters to the user passed counter struct
4016 * NB: both 1->0 and 0->1 transitions are counted except for
4017 * RI where only 0->1 is counted.
4018 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004019 case TIOCGICOUNT:
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07004020 spin_lock_irqsave(&info->card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08004021 cnow = info->icount;
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07004022 spin_unlock_irqrestore(&info->card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08004023 p_cuser = argp;
4024 ret_val = put_user(cnow.cts, &p_cuser->cts);
4025 if (ret_val)
Alan Cox7b130c02008-04-30 00:53:16 -07004026 break;
Jiri Slaby02f11752006-12-08 02:39:28 -08004027 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4028 if (ret_val)
Alan Cox7b130c02008-04-30 00:53:16 -07004029 break;
Jiri Slaby02f11752006-12-08 02:39:28 -08004030 ret_val = put_user(cnow.rng, &p_cuser->rng);
4031 if (ret_val)
Alan Cox7b130c02008-04-30 00:53:16 -07004032 break;
Jiri Slaby02f11752006-12-08 02:39:28 -08004033 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4034 if (ret_val)
Alan Cox7b130c02008-04-30 00:53:16 -07004035 break;
Jiri Slaby02f11752006-12-08 02:39:28 -08004036 ret_val = put_user(cnow.rx, &p_cuser->rx);
4037 if (ret_val)
Alan Cox7b130c02008-04-30 00:53:16 -07004038 break;
Jiri Slaby02f11752006-12-08 02:39:28 -08004039 ret_val = put_user(cnow.tx, &p_cuser->tx);
4040 if (ret_val)
Alan Cox7b130c02008-04-30 00:53:16 -07004041 break;
Jiri Slaby02f11752006-12-08 02:39:28 -08004042 ret_val = put_user(cnow.frame, &p_cuser->frame);
4043 if (ret_val)
Alan Cox7b130c02008-04-30 00:53:16 -07004044 break;
Jiri Slaby02f11752006-12-08 02:39:28 -08004045 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4046 if (ret_val)
Alan Cox7b130c02008-04-30 00:53:16 -07004047 break;
Jiri Slaby02f11752006-12-08 02:39:28 -08004048 ret_val = put_user(cnow.parity, &p_cuser->parity);
4049 if (ret_val)
Alan Cox7b130c02008-04-30 00:53:16 -07004050 break;
Jiri Slaby02f11752006-12-08 02:39:28 -08004051 ret_val = put_user(cnow.brk, &p_cuser->brk);
4052 if (ret_val)
Alan Cox7b130c02008-04-30 00:53:16 -07004053 break;
Jiri Slaby02f11752006-12-08 02:39:28 -08004054 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4055 if (ret_val)
Alan Cox7b130c02008-04-30 00:53:16 -07004056 break;
Jiri Slaby02f11752006-12-08 02:39:28 -08004057 ret_val = 0;
4058 break;
4059 default:
4060 ret_val = -ENOIOCTLCMD;
4061 }
Alan Cox7b130c02008-04-30 00:53:16 -07004062 unlock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004063
4064#ifdef CY_DEBUG_OTHER
Jiri Slaby21719192007-05-08 00:36:42 -07004065 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07004066#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08004067 return ret_val;
4068} /* cy_ioctl */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004069
4070/*
4071 * This routine allows the tty driver to be notified when
4072 * device's termios settings have changed. Note that a
4073 * well-designed tty driver should be prepared to accept the case
4074 * where old == NULL, and try to do something rational.
4075 */
Jiri Slaby02f11752006-12-08 02:39:28 -08004076static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004077{
Jiri Slabycab9bdd2007-05-08 00:35:51 -07004078 struct cyclades_port *info = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004079
4080#ifdef CY_DEBUG_OTHER
Jiri Slaby21719192007-05-08 00:36:42 -07004081 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004082#endif
4083
Jiri Slaby02f11752006-12-08 02:39:28 -08004084 set_line_char(info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004085
Jiri Slaby02f11752006-12-08 02:39:28 -08004086 if ((old_termios->c_cflag & CRTSCTS) &&
4087 !(tty->termios->c_cflag & CRTSCTS)) {
4088 tty->hw_stopped = 0;
4089 cy_start(tty);
4090 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004091#if 0
Jiri Slaby02f11752006-12-08 02:39:28 -08004092 /*
4093 * No need to wake up processes in open wait, since they
4094 * sample the CLOCAL flag once, and don't recheck it.
4095 * XXX It's not clear whether the current behavior is correct
4096 * or not. Hence, this may change.....
4097 */
4098 if (!(old_termios->c_cflag & CLOCAL) &&
4099 (tty->termios->c_cflag & CLOCAL))
Alan Cox77451e52008-07-16 21:57:02 +01004100 wake_up_interruptible(&info->port.open_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004101#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08004102} /* cy_set_termios */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004103
4104/* This function is used to send a high-priority XON/XOFF character to
4105 the device.
4106*/
Jiri Slaby02f11752006-12-08 02:39:28 -08004107static void cy_send_xchar(struct tty_struct *tty, char ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004108{
Jiri Slabycab9bdd2007-05-08 00:35:51 -07004109 struct cyclades_port *info = tty->driver_data;
Jiri Slaby875b2062007-05-08 00:36:49 -07004110 struct cyclades_card *card;
4111 int channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004112
Jiri Slaby02f11752006-12-08 02:39:28 -08004113 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004114 return;
4115
Jiri Slaby02f11752006-12-08 02:39:28 -08004116 info->x_char = ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004117
4118 if (ch)
Jiri Slaby02f11752006-12-08 02:39:28 -08004119 cy_start(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004120
4121 card = info->card;
Jiri Slaby875b2062007-05-08 00:36:49 -07004122 channel = info->line - card->first_line;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004123
Jiri Slaby875b2062007-05-08 00:36:49 -07004124 if (IS_CYC_Z(*card)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08004125 if (ch == STOP_CHAR(tty))
Jiri Slaby875b2062007-05-08 00:36:49 -07004126 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
Jiri Slaby02f11752006-12-08 02:39:28 -08004127 else if (ch == START_CHAR(tty))
Jiri Slaby875b2062007-05-08 00:36:49 -07004128 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004129 }
4130}
4131
4132/* This routine is called by the upper-layer tty layer to signal
4133 that incoming characters should be throttled because the input
4134 buffers are close to full.
4135 */
Jiri Slaby02f11752006-12-08 02:39:28 -08004136static void cy_throttle(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004137{
Jiri Slabycab9bdd2007-05-08 00:35:51 -07004138 struct cyclades_port *info = tty->driver_data;
Jiri Slaby875b2062007-05-08 00:36:49 -07004139 struct cyclades_card *card;
Jiri Slaby02f11752006-12-08 02:39:28 -08004140 unsigned long flags;
4141 void __iomem *base_addr;
Jiri Slaby875b2062007-05-08 00:36:49 -07004142 int chip, channel, index;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004143
4144#ifdef CY_DEBUG_THROTTLE
Jiri Slaby02f11752006-12-08 02:39:28 -08004145 char buf[64];
Linus Torvalds1da177e2005-04-16 15:20:36 -07004146
Jiri Slaby21719192007-05-08 00:36:42 -07004147 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
Jiri Slaby02f11752006-12-08 02:39:28 -08004148 tty->ldisc.chars_in_buffer(tty), info->line);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004149#endif
4150
Alan Cox15ed6cc2008-04-30 00:53:55 -07004151 if (serial_paranoia_check(info, tty->name, "cy_throttle"))
Jiri Slaby02f11752006-12-08 02:39:28 -08004152 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004153
Jiri Slaby02f11752006-12-08 02:39:28 -08004154 card = info->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004155
Jiri Slaby02f11752006-12-08 02:39:28 -08004156 if (I_IXOFF(tty)) {
Jiri Slaby875b2062007-05-08 00:36:49 -07004157 if (!IS_CYC_Z(*card))
Jiri Slaby02f11752006-12-08 02:39:28 -08004158 cy_send_xchar(tty, STOP_CHAR(tty));
4159 else
4160 info->throttle = 1;
4161 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004162
Jiri Slaby02f11752006-12-08 02:39:28 -08004163 if (tty->termios->c_cflag & CRTSCTS) {
Jiri Slaby875b2062007-05-08 00:36:49 -07004164 channel = info->line - card->first_line;
4165 if (!IS_CYC_Z(*card)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08004166 chip = channel >> 2;
4167 channel &= 0x03;
Jiri Slaby875b2062007-05-08 00:36:49 -07004168 index = card->bus_index;
4169 base_addr = card->base_addr +
Jiri Slaby02f11752006-12-08 02:39:28 -08004170 (cy_chip_offset[chip] << index);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004171
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07004172 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08004173 cy_writeb(base_addr + (CyCAR << index),
4174 (u_char) channel);
4175 if (info->rtsdtr_inv) {
4176 cy_writeb(base_addr + (CyMSVR2 << index),
4177 ~CyDTR);
4178 } else {
4179 cy_writeb(base_addr + (CyMSVR1 << index),
4180 ~CyRTS);
4181 }
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07004182 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08004183 } else {
4184 info->throttle = 1;
4185 }
4186 }
Jiri Slaby02f11752006-12-08 02:39:28 -08004187} /* cy_throttle */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004188
4189/*
4190 * This routine notifies the tty driver that it should signal
4191 * that characters can now be sent to the tty without fear of
4192 * overrunning the input buffers of the line disciplines.
4193 */
Jiri Slaby02f11752006-12-08 02:39:28 -08004194static void cy_unthrottle(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004195{
Jiri Slabycab9bdd2007-05-08 00:35:51 -07004196 struct cyclades_port *info = tty->driver_data;
Jiri Slaby875b2062007-05-08 00:36:49 -07004197 struct cyclades_card *card;
Jiri Slaby02f11752006-12-08 02:39:28 -08004198 unsigned long flags;
4199 void __iomem *base_addr;
Jiri Slaby875b2062007-05-08 00:36:49 -07004200 int chip, channel, index;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004201
4202#ifdef CY_DEBUG_THROTTLE
Jiri Slaby02f11752006-12-08 02:39:28 -08004203 char buf[64];
4204
Jiri Slaby21719192007-05-08 00:36:42 -07004205 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
Alan Cox15ed6cc2008-04-30 00:53:55 -07004206 tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004207#endif
4208
Alan Cox15ed6cc2008-04-30 00:53:55 -07004209 if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
Jiri Slaby02f11752006-12-08 02:39:28 -08004210 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004211
Jiri Slaby02f11752006-12-08 02:39:28 -08004212 if (I_IXOFF(tty)) {
4213 if (info->x_char)
4214 info->x_char = 0;
4215 else
4216 cy_send_xchar(tty, START_CHAR(tty));
4217 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004218
Jiri Slaby02f11752006-12-08 02:39:28 -08004219 if (tty->termios->c_cflag & CRTSCTS) {
4220 card = info->card;
Jiri Slaby875b2062007-05-08 00:36:49 -07004221 channel = info->line - card->first_line;
4222 if (!IS_CYC_Z(*card)) {
Jiri Slaby02f11752006-12-08 02:39:28 -08004223 chip = channel >> 2;
4224 channel &= 0x03;
Jiri Slaby875b2062007-05-08 00:36:49 -07004225 index = card->bus_index;
4226 base_addr = card->base_addr +
Jiri Slaby02f11752006-12-08 02:39:28 -08004227 (cy_chip_offset[chip] << index);
4228
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07004229 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08004230 cy_writeb(base_addr + (CyCAR << index),
4231 (u_char) channel);
4232 if (info->rtsdtr_inv) {
4233 cy_writeb(base_addr + (CyMSVR2 << index),
4234 CyDTR);
4235 } else {
4236 cy_writeb(base_addr + (CyMSVR1 << index),
4237 CyRTS);
4238 }
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07004239 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08004240 } else {
4241 info->throttle = 0;
4242 }
4243 }
Jiri Slaby02f11752006-12-08 02:39:28 -08004244} /* cy_unthrottle */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004245
4246/* cy_start and cy_stop provide software output flow control as a
4247 function of XON/XOFF, software CTS, and other such stuff.
4248*/
Jiri Slaby02f11752006-12-08 02:39:28 -08004249static void cy_stop(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004250{
Jiri Slaby02f11752006-12-08 02:39:28 -08004251 struct cyclades_card *cinfo;
Jiri Slabycab9bdd2007-05-08 00:35:51 -07004252 struct cyclades_port *info = tty->driver_data;
Jiri Slaby02f11752006-12-08 02:39:28 -08004253 void __iomem *base_addr;
4254 int chip, channel, index;
4255 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004256
4257#ifdef CY_DEBUG_OTHER
Jiri Slaby21719192007-05-08 00:36:42 -07004258 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004259#endif
4260
Jiri Slaby02f11752006-12-08 02:39:28 -08004261 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4262 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004263
Jiri Slaby875b2062007-05-08 00:36:49 -07004264 cinfo = info->card;
Jiri Slaby02f11752006-12-08 02:39:28 -08004265 channel = info->line - cinfo->first_line;
4266 if (!IS_CYC_Z(*cinfo)) {
4267 index = cinfo->bus_index;
4268 chip = channel >> 2;
4269 channel &= 0x03;
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07004270 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004271
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07004272 spin_lock_irqsave(&cinfo->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08004273 cy_writeb(base_addr + (CyCAR << index),
4274 (u_char)(channel & 0x0003)); /* index channel */
4275 cy_writeb(base_addr + (CySRER << index),
Jiri Slabydb05c3b2007-05-08 00:35:46 -07004276 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07004277 spin_unlock_irqrestore(&cinfo->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004278 }
Jiri Slaby02f11752006-12-08 02:39:28 -08004279} /* cy_stop */
4280
4281static void cy_start(struct tty_struct *tty)
4282{
4283 struct cyclades_card *cinfo;
Jiri Slabycab9bdd2007-05-08 00:35:51 -07004284 struct cyclades_port *info = tty->driver_data;
Jiri Slaby02f11752006-12-08 02:39:28 -08004285 void __iomem *base_addr;
4286 int chip, channel, index;
4287 unsigned long flags;
4288
4289#ifdef CY_DEBUG_OTHER
Jiri Slaby21719192007-05-08 00:36:42 -07004290 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
Jiri Slaby02f11752006-12-08 02:39:28 -08004291#endif
4292
4293 if (serial_paranoia_check(info, tty->name, "cy_start"))
4294 return;
4295
Jiri Slaby875b2062007-05-08 00:36:49 -07004296 cinfo = info->card;
Jiri Slaby02f11752006-12-08 02:39:28 -08004297 channel = info->line - cinfo->first_line;
4298 index = cinfo->bus_index;
4299 if (!IS_CYC_Z(*cinfo)) {
4300 chip = channel >> 2;
4301 channel &= 0x03;
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07004302 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
Jiri Slaby02f11752006-12-08 02:39:28 -08004303
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07004304 spin_lock_irqsave(&cinfo->card_lock, flags);
Alan Cox15ed6cc2008-04-30 00:53:55 -07004305 cy_writeb(base_addr + (CyCAR << index),
4306 (u_char) (channel & 0x0003)); /* index channel */
Jiri Slaby02f11752006-12-08 02:39:28 -08004307 cy_writeb(base_addr + (CySRER << index),
Jiri Slabydb05c3b2007-05-08 00:35:46 -07004308 readb(base_addr + (CySRER << index)) | CyTxRdy);
Jiri Slaby9fa1b3b182007-05-08 00:36:57 -07004309 spin_unlock_irqrestore(&cinfo->card_lock, flags);
Jiri Slaby02f11752006-12-08 02:39:28 -08004310 }
Jiri Slaby02f11752006-12-08 02:39:28 -08004311} /* cy_start */
4312
Linus Torvalds1da177e2005-04-16 15:20:36 -07004313/*
4314 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4315 */
Jiri Slaby02f11752006-12-08 02:39:28 -08004316static void cy_hangup(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004317{
Jiri Slabycab9bdd2007-05-08 00:35:51 -07004318 struct cyclades_port *info = tty->driver_data;
Jiri Slaby02f11752006-12-08 02:39:28 -08004319
Linus Torvalds1da177e2005-04-16 15:20:36 -07004320#ifdef CY_DEBUG_OTHER
Jiri Slaby21719192007-05-08 00:36:42 -07004321 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004322#endif
4323
Jiri Slaby02f11752006-12-08 02:39:28 -08004324 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4325 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004326
Jiri Slaby02f11752006-12-08 02:39:28 -08004327 cy_flush_buffer(tty);
4328 shutdown(info);
Alan Cox77451e52008-07-16 21:57:02 +01004329 info->port.count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004330#ifdef CY_DEBUG_COUNT
Jiri Slaby21719192007-05-08 00:36:42 -07004331 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4332 current->pid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004333#endif
Alan Cox77451e52008-07-16 21:57:02 +01004334 info->port.tty = NULL;
4335 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
4336 wake_up_interruptible(&info->port.open_wait);
Jiri Slaby02f11752006-12-08 02:39:28 -08004337} /* cy_hangup */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004338
4339/*
4340 * ---------------------------------------------------------------------
4341 * cy_init() and friends
4342 *
4343 * cy_init() is called at boot-time to initialize the serial driver.
4344 * ---------------------------------------------------------------------
4345 */
4346
Jiri Slabydd025c02007-05-08 00:37:02 -07004347static int __devinit cy_init_card(struct cyclades_card *cinfo)
Jiri Slaby0809e262007-05-08 00:36:14 -07004348{
4349 struct cyclades_port *info;
Jeff Garzika6343af2007-07-17 05:39:58 -04004350 u32 uninitialized_var(mailbox);
Jiri Slaby65f76a82007-10-18 03:06:22 -07004351 unsigned int nports, port;
Jiri Slaby0809e262007-05-08 00:36:14 -07004352 unsigned short chip_number;
Jiri Slaby65f76a82007-10-18 03:06:22 -07004353 int uninitialized_var(index);
Jiri Slaby0809e262007-05-08 00:36:14 -07004354
Jiri Slaby3046d502007-05-08 00:36:46 -07004355 spin_lock_init(&cinfo->card_lock);
4356
Jiri Slabyc2ad4c72007-05-08 00:36:32 -07004357 if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
Jiri Slaby0809e262007-05-08 00:36:14 -07004358 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4359 cinfo->ctl_addr)->mail_box_0);
4360 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4361 cinfo->intr_enabled = 0;
4362 cinfo->nports = 0; /* Will be correctly set later, after
4363 Z FW is loaded */
Jiri Slaby3046d502007-05-08 00:36:46 -07004364 } else {
4365 index = cinfo->bus_index;
4366 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4367 }
4368
Jiri Slabydd025c02007-05-08 00:37:02 -07004369 cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4370 if (cinfo->ports == NULL) {
4371 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
Jiri Slaby31375532007-05-08 00:37:04 -07004372 cinfo->nports = 0;
Jiri Slabydd025c02007-05-08 00:37:02 -07004373 return -ENOMEM;
4374 }
4375
Jiri Slaby3046d502007-05-08 00:36:46 -07004376 for (port = cinfo->first_line; port < cinfo->first_line + nports;
4377 port++) {
Jiri Slabydd025c02007-05-08 00:37:02 -07004378 info = &cinfo->ports[port - cinfo->first_line];
Alan Cox44b7d1b2008-07-16 21:57:18 +01004379 tty_port_init(&info->port);
Jiri Slaby3046d502007-05-08 00:36:46 -07004380 info->magic = CYCLADES_MAGIC;
Jiri Slaby875b2062007-05-08 00:36:49 -07004381 info->card = cinfo;
Jiri Slaby3046d502007-05-08 00:36:46 -07004382 info->line = port;
Jiri Slaby3046d502007-05-08 00:36:46 -07004383
Alan Cox44b7d1b2008-07-16 21:57:18 +01004384 info->port.closing_wait = CLOSING_WAIT_DELAY;
4385 info->port.close_delay = 5 * HZ / 10;
Alan Cox77451e52008-07-16 21:57:02 +01004386 info->port.flags = STD_COM_FLAGS;
Jiri Slaby2c7fea92007-05-08 00:36:51 -07004387 init_completion(&info->shutdown_wait);
Jiri Slaby3046d502007-05-08 00:36:46 -07004388 init_waitqueue_head(&info->delta_msr_wait);
4389
4390 if (IS_CYC_Z(*cinfo)) {
Jiri Slaby0809e262007-05-08 00:36:14 -07004391 info->type = PORT_STARTECH;
Jiri Slaby0809e262007-05-08 00:36:14 -07004392 if (mailbox == ZO_V1)
4393 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4394 else
Jiri Slaby3046d502007-05-08 00:36:46 -07004395 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
Jiri Slaby0809e262007-05-08 00:36:14 -07004396#ifdef CONFIG_CYZ_INTR
Jiri Slaby39914282007-05-08 00:36:54 -07004397 setup_timer(&cyz_rx_full_timer[port],
4398 cyz_rx_restart, (unsigned long)info);
Jiri Slaby0809e262007-05-08 00:36:14 -07004399#endif
Jiri Slaby3046d502007-05-08 00:36:46 -07004400 } else {
Jiri Slaby0809e262007-05-08 00:36:14 -07004401 info->type = PORT_CIRRUS;
Jiri Slaby0809e262007-05-08 00:36:14 -07004402 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
Jiri Slaby3046d502007-05-08 00:36:46 -07004403 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
Jiri Slaby0809e262007-05-08 00:36:14 -07004404 info->cor2 = CyETC;
4405 info->cor3 = 0x08; /* _very_ small rcv threshold */
Jiri Slaby3046d502007-05-08 00:36:46 -07004406
Jiri Slaby0809e262007-05-08 00:36:14 -07004407 chip_number = (port - cinfo->first_line) / 4;
Alan Cox15ed6cc2008-04-30 00:53:55 -07004408 info->chip_rev = readb(cinfo->base_addr +
4409 (cy_chip_offset[chip_number] << index) +
4410 (CyGFRCR << index));
4411
4412 if (info->chip_rev >= CD1400_REV_J) {
Jiri Slaby0809e262007-05-08 00:36:14 -07004413 /* It is a CD1400 rev. J or later */
4414 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4415 info->tco = baud_co_60[13]; /* Tx CO */
4416 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4417 info->rco = baud_co_60[13]; /* Rx CO */
Jiri Slaby0809e262007-05-08 00:36:14 -07004418 info->rtsdtr_inv = 1;
4419 } else {
4420 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4421 info->tco = baud_co_25[13]; /* Tx CO */
4422 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4423 info->rco = baud_co_25[13]; /* Rx CO */
Jiri Slaby0809e262007-05-08 00:36:14 -07004424 info->rtsdtr_inv = 0;
4425 }
Jiri Slaby3046d502007-05-08 00:36:46 -07004426 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4427 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
Jiri Slaby0809e262007-05-08 00:36:14 -07004428 }
Jiri Slaby3046d502007-05-08 00:36:46 -07004429
Jiri Slaby0809e262007-05-08 00:36:14 -07004430 }
Jiri Slaby3046d502007-05-08 00:36:46 -07004431
4432#ifndef CONFIG_CYZ_INTR
4433 if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4434 mod_timer(&cyz_timerlist, jiffies + 1);
4435#ifdef CY_PCI_DEBUG
4436 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4437#endif
4438 }
4439#endif
Jiri Slabydd025c02007-05-08 00:37:02 -07004440 return 0;
Jiri Slaby0809e262007-05-08 00:36:14 -07004441}
4442
Linus Torvalds1da177e2005-04-16 15:20:36 -07004443/* initialize chips on Cyclom-Y card -- return number of valid
4444 chips (which is number of ports/4) */
Jiri Slaby31b4f0a2007-05-08 00:36:44 -07004445static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4446 int index)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004447{
Jiri Slaby02f11752006-12-08 02:39:28 -08004448 unsigned int chip_number;
4449 void __iomem *base_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004450
Jiri Slaby02f11752006-12-08 02:39:28 -08004451 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4452 /* Cy_HwReset is 0x1400 */
4453 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4454 /* Cy_ClrIntr is 0x1800 */
4455 udelay(500L);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004456
Alan Cox15ed6cc2008-04-30 00:53:55 -07004457 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
4458 chip_number++) {
Jiri Slaby02f11752006-12-08 02:39:28 -08004459 base_addr =
4460 true_base_addr + (cy_chip_offset[chip_number] << index);
4461 mdelay(1);
Jiri Slabydb05c3b2007-05-08 00:35:46 -07004462 if (readb(base_addr + (CyCCR << index)) != 0x00) {
Jiri Slaby02f11752006-12-08 02:39:28 -08004463 /*************
4464 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4465 chip_number, (unsigned long)base_addr);
4466 *************/
4467 return chip_number;
4468 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004469
Jiri Slaby02f11752006-12-08 02:39:28 -08004470 cy_writeb(base_addr + (CyGFRCR << index), 0);
4471 udelay(10L);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004472
Jiri Slaby02f11752006-12-08 02:39:28 -08004473 /* The Cyclom-16Y does not decode address bit 9 and therefore
4474 cannot distinguish between references to chip 0 and a non-
4475 existent chip 4. If the preceding clearing of the supposed
4476 chip 4 GFRCR register appears at chip 0, there is no chip 4
4477 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4478 */
Jiri Slabydb05c3b2007-05-08 00:35:46 -07004479 if (chip_number == 4 && readb(true_base_addr +
Jiri Slaby02f11752006-12-08 02:39:28 -08004480 (cy_chip_offset[0] << index) +
4481 (CyGFRCR << index)) == 0) {
4482 return chip_number;
4483 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004484
Jiri Slaby02f11752006-12-08 02:39:28 -08004485 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4486 mdelay(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004487
Jiri Slabydb05c3b2007-05-08 00:35:46 -07004488 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
Jiri Slaby02f11752006-12-08 02:39:28 -08004489 /*
4490 printk(" chip #%d at %#6lx is not responding ",
4491 chip_number, (unsigned long)base_addr);
4492 printk("(GFRCR stayed 0)\n",
4493 */
4494 return chip_number;
4495 }
Jiri Slabydb05c3b2007-05-08 00:35:46 -07004496 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
Jiri Slaby02f11752006-12-08 02:39:28 -08004497 0x40) {
4498 /*
4499 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4500 "%#2x)\n",
4501 chip_number, (unsigned long)base_addr,
4502 base_addr[CyGFRCR<<index]);
4503 */
4504 return chip_number;
4505 }
4506 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
Jiri Slabydb05c3b2007-05-08 00:35:46 -07004507 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
Jiri Slaby02f11752006-12-08 02:39:28 -08004508 /* It is a CD1400 rev. J or later */
4509 /* Impossible to reach 5ms with this chip.
4510 Changed to 2ms instead (f = 500 Hz). */
4511 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4512 } else {
4513 /* f = 200 Hz */
4514 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4515 }
4516
4517 /*
4518 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4519 chip_number, (unsigned long)base_addr,
Jiri Slabydb05c3b2007-05-08 00:35:46 -07004520 readb(base_addr+(CyGFRCR<<index)));
Jiri Slaby02f11752006-12-08 02:39:28 -08004521 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004522 }
Jiri Slaby02f11752006-12-08 02:39:28 -08004523 return chip_number;
4524} /* cyy_init_card */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004525
4526/*
4527 * ---------------------------------------------------------------------
4528 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4529 * sets global variables and return the number of ISA boards found.
4530 * ---------------------------------------------------------------------
4531 */
Jiri Slaby02f11752006-12-08 02:39:28 -08004532static int __init cy_detect_isa(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004533{
4534#ifdef CONFIG_ISA
Jiri Slaby02f11752006-12-08 02:39:28 -08004535 unsigned short cy_isa_irq, nboard;
4536 void __iomem *cy_isa_address;
4537 unsigned short i, j, cy_isa_nchan;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004538#ifdef MODULE
Jiri Slaby02f11752006-12-08 02:39:28 -08004539 int isparam = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004540#endif
4541
Jiri Slaby02f11752006-12-08 02:39:28 -08004542 nboard = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004543
4544#ifdef MODULE
4545 /* Check for module parameters */
Jiri Slaby02f11752006-12-08 02:39:28 -08004546 for (i = 0; i < NR_CARDS; i++) {
4547 if (maddr[i] || i) {
4548 isparam = 1;
4549 cy_isa_addresses[i] = maddr[i];
4550 }
4551 if (!maddr[i])
4552 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004553 }
4554#endif
4555
Jiri Slaby02f11752006-12-08 02:39:28 -08004556 /* scan the address table probing for Cyclom-Y/ISA boards */
4557 for (i = 0; i < NR_ISA_ADDRS; i++) {
4558 unsigned int isa_address = cy_isa_addresses[i];
Alan Cox15ed6cc2008-04-30 00:53:55 -07004559 if (isa_address == 0x0000)
Jiri Slaby096dcfc2006-12-08 02:39:30 -08004560 return nboard;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004561
Jiri Slaby02f11752006-12-08 02:39:28 -08004562 /* probe for CD1400... */
Alan Coxcd989b32008-04-30 00:53:56 -07004563 cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
Jiri Slaby31375532007-05-08 00:37:04 -07004564 if (cy_isa_address == NULL) {
4565 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4566 "address\n");
4567 continue;
4568 }
Jiri Slaby02f11752006-12-08 02:39:28 -08004569 cy_isa_nchan = CyPORTS_PER_CHIP *
4570 cyy_init_card(cy_isa_address, 0);
4571 if (cy_isa_nchan == 0) {
Jiri Slaby31375532007-05-08 00:37:04 -07004572 iounmap(cy_isa_address);
Jiri Slaby02f11752006-12-08 02:39:28 -08004573 continue;
4574 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004575#ifdef MODULE
4576 if (isparam && irq[i])
Jiri Slaby02f11752006-12-08 02:39:28 -08004577 cy_isa_irq = irq[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07004578 else
4579#endif
Jiri Slaby02f11752006-12-08 02:39:28 -08004580 /* find out the board's irq by probing */
4581 cy_isa_irq = detect_isa_irq(cy_isa_address);
4582 if (cy_isa_irq == 0) {
Jiri Slaby21719192007-05-08 00:36:42 -07004583 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4584 "IRQ could not be detected.\n",
Jiri Slaby02f11752006-12-08 02:39:28 -08004585 (unsigned long)cy_isa_address);
Jiri Slaby31375532007-05-08 00:37:04 -07004586 iounmap(cy_isa_address);
Jiri Slaby02f11752006-12-08 02:39:28 -08004587 continue;
4588 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004589
Jiri Slaby02f11752006-12-08 02:39:28 -08004590 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
Jiri Slaby21719192007-05-08 00:36:42 -07004591 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4592 "more channels are available. Change NR_PORTS "
4593 "in cyclades.c and recompile kernel.\n",
Jiri Slaby02f11752006-12-08 02:39:28 -08004594 (unsigned long)cy_isa_address);
Jiri Slaby31375532007-05-08 00:37:04 -07004595 iounmap(cy_isa_address);
Jiri Slaby096dcfc2006-12-08 02:39:30 -08004596 return nboard;
Jiri Slaby02f11752006-12-08 02:39:28 -08004597 }
4598 /* fill the next cy_card structure available */
4599 for (j = 0; j < NR_CARDS; j++) {
Jiri Slabyf7429032007-05-08 00:36:59 -07004600 if (cy_card[j].base_addr == NULL)
Jiri Slaby02f11752006-12-08 02:39:28 -08004601 break;
4602 }
4603 if (j == NR_CARDS) { /* no more cy_cards available */
Jiri Slaby21719192007-05-08 00:36:42 -07004604 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4605 "more cards can be used. Change NR_CARDS in "
4606 "cyclades.c and recompile kernel.\n",
Jiri Slaby02f11752006-12-08 02:39:28 -08004607 (unsigned long)cy_isa_address);
Jiri Slaby31375532007-05-08 00:37:04 -07004608 iounmap(cy_isa_address);
Jiri Slaby096dcfc2006-12-08 02:39:30 -08004609 return nboard;
Jiri Slaby02f11752006-12-08 02:39:28 -08004610 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004611
Jiri Slaby02f11752006-12-08 02:39:28 -08004612 /* allocate IRQ */
4613 if (request_irq(cy_isa_irq, cyy_interrupt,
4614 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
Jiri Slaby21719192007-05-08 00:36:42 -07004615 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4616 "could not allocate IRQ#%d.\n",
4617 (unsigned long)cy_isa_address, cy_isa_irq);
Jiri Slaby31375532007-05-08 00:37:04 -07004618 iounmap(cy_isa_address);
Jiri Slaby096dcfc2006-12-08 02:39:30 -08004619 return nboard;
Jiri Slaby02f11752006-12-08 02:39:28 -08004620 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004621
Jiri Slaby02f11752006-12-08 02:39:28 -08004622 /* set cy_card */
4623 cy_card[j].base_addr = cy_isa_address;
4624 cy_card[j].ctl_addr = NULL;
4625 cy_card[j].irq = (int)cy_isa_irq;
4626 cy_card[j].bus_index = 0;
4627 cy_card[j].first_line = cy_next_channel;
4628 cy_card[j].num_chips = cy_isa_nchan / 4;
Jiri Slaby31375532007-05-08 00:37:04 -07004629 if (cy_init_card(&cy_card[j])) {
4630 cy_card[j].base_addr = NULL;
4631 free_irq(cy_isa_irq, &cy_card[j]);
4632 iounmap(cy_isa_address);
4633 continue;
4634 }
Jiri Slaby02f11752006-12-08 02:39:28 -08004635 nboard++;
4636
Jiri Slaby21719192007-05-08 00:36:42 -07004637 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4638 "%d channels starting from port %d\n",
Jiri Slaby02f11752006-12-08 02:39:28 -08004639 j + 1, (unsigned long)cy_isa_address,
4640 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
Jiri Slaby21719192007-05-08 00:36:42 -07004641 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4642
Jiri Slaby6ad1ccc2007-05-08 00:36:22 -07004643 for (j = cy_next_channel;
4644 j < cy_next_channel + cy_isa_nchan; j++)
4645 tty_register_device(cy_serial_driver, j, NULL);
Jiri Slaby02f11752006-12-08 02:39:28 -08004646 cy_next_channel += cy_isa_nchan;
4647 }
Jiri Slaby096dcfc2006-12-08 02:39:30 -08004648 return nboard;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004649#else
Jiri Slaby096dcfc2006-12-08 02:39:30 -08004650 return 0;
Jiri Slaby02f11752006-12-08 02:39:28 -08004651#endif /* CONFIG_ISA */
4652} /* cy_detect_isa */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004653
Jiri Slaby58936d82007-05-08 00:36:13 -07004654#ifdef CONFIG_PCI
Jiri Slaby054f5b02007-07-17 04:05:16 -07004655static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4656{
4657 unsigned int a;
4658
4659 for (a = 0; a < size && *str; a++, str++)
4660 if (*str & 0x80)
4661 return -EINVAL;
4662
4663 for (; a < size; a++, str++)
4664 if (*str)
4665 return -EINVAL;
4666
4667 return 0;
4668}
4669
David Woodhousef61e7612008-05-23 23:57:19 +01004670static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
Jiri Slaby054f5b02007-07-17 04:05:16 -07004671 unsigned int size)
4672{
4673 for (; size > 0; size--) {
4674 cy_writel(fpga, *data++);
4675 udelay(10);
4676 }
4677}
4678
4679static void __devinit plx_init(struct pci_dev *pdev, int irq,
4680 struct RUNTIME_9060 __iomem *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004681{
Jiri Slaby02f11752006-12-08 02:39:28 -08004682 /* Reset PLX */
Jiri Slaby054f5b02007-07-17 04:05:16 -07004683 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
Jiri Slaby02f11752006-12-08 02:39:28 -08004684 udelay(100L);
Jiri Slaby054f5b02007-07-17 04:05:16 -07004685 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004686
Jiri Slaby02f11752006-12-08 02:39:28 -08004687 /* Reload Config. Registers from EEPROM */
Jiri Slaby054f5b02007-07-17 04:05:16 -07004688 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
Jiri Slaby02f11752006-12-08 02:39:28 -08004689 udelay(100L);
Jiri Slaby054f5b02007-07-17 04:05:16 -07004690 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4691
4692 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4693 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4694 * registers. This will remain here until we find a permanent fix.
4695 */
4696 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4697}
4698
4699static int __devinit __cyz_load_fw(const struct firmware *fw,
4700 const char *name, const u32 mailbox, void __iomem *base,
4701 void __iomem *fpga)
4702{
David Woodhousef61e7612008-05-23 23:57:19 +01004703 const void *ptr = fw->data;
4704 const struct zfile_header *h = ptr;
4705 const struct zfile_config *c, *cs;
4706 const struct zfile_block *b, *bs;
Jiri Slaby054f5b02007-07-17 04:05:16 -07004707 unsigned int a, tmp, len = fw->size;
4708#define BAD_FW KERN_ERR "Bad firmware: "
4709 if (len < sizeof(*h)) {
4710 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4711 return -EINVAL;
4712 }
4713
4714 cs = ptr + h->config_offset;
4715 bs = ptr + h->block_offset;
4716
4717 if ((void *)(cs + h->n_config) > ptr + len ||
4718 (void *)(bs + h->n_blocks) > ptr + len) {
4719 printk(BAD_FW "too short");
4720 return -EINVAL;
4721 }
4722
4723 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4724 cyc_isfwstr(h->date, sizeof(h->date))) {
4725 printk(BAD_FW "bad formatted header string\n");
4726 return -EINVAL;
4727 }
4728
4729 if (strncmp(name, h->name, sizeof(h->name))) {
4730 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4731 return -EINVAL;
4732 }
4733
4734 tmp = 0;
4735 for (c = cs; c < cs + h->n_config; c++) {
4736 for (a = 0; a < c->n_blocks; a++)
4737 if (c->block_list[a] > h->n_blocks) {
4738 printk(BAD_FW "bad block ref number in cfgs\n");
4739 return -EINVAL;
4740 }
4741 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4742 tmp++;
4743 }
4744 if (!tmp) {
4745 printk(BAD_FW "nothing appropriate\n");
4746 return -EINVAL;
4747 }
4748
4749 for (b = bs; b < bs + h->n_blocks; b++)
4750 if (b->file_offset + b->size > len) {
4751 printk(BAD_FW "bad block data offset\n");
4752 return -EINVAL;
4753 }
4754
4755 /* everything is OK, let's seek'n'load it */
4756 for (c = cs; c < cs + h->n_config; c++)
4757 if (c->mailbox == mailbox && c->function == 0)
4758 break;
4759
4760 for (a = 0; a < c->n_blocks; a++) {
4761 b = &bs[c->block_list[a]];
4762 if (b->type == ZBLOCK_FPGA) {
4763 if (fpga != NULL)
4764 cyz_fpga_copy(fpga, ptr + b->file_offset,
4765 b->size);
4766 } else {
4767 if (base != NULL)
4768 memcpy_toio(base + b->ram_offset,
4769 ptr + b->file_offset, b->size);
4770 }
4771 }
4772#undef BAD_FW
4773 return 0;
4774}
4775
4776static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4777 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4778{
4779 const struct firmware *fw;
4780 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4781 struct CUSTOM_REG __iomem *cust = base_addr;
4782 struct ZFW_CTRL __iomem *pt_zfwctrl;
Jiri Slabyc4923b42007-07-17 04:05:17 -07004783 void __iomem *tmp;
Jiri Slaby054f5b02007-07-17 04:05:16 -07004784 u32 mailbox, status;
4785 unsigned int i;
4786 int retval;
4787
4788 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4789 if (retval) {
4790 dev_err(&pdev->dev, "can't get firmware\n");
4791 goto err;
4792 }
4793
4794 /* Check whether the firmware is already loaded and running. If
4795 positive, skip this board */
4796 if (Z_FPGA_LOADED(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4797 u32 cntval = readl(base_addr + 0x190);
4798
4799 udelay(100);
4800 if (cntval != readl(base_addr + 0x190)) {
4801 /* FW counter is working, FW is running */
4802 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4803 "Skipping board.\n");
4804 retval = 0;
4805 goto err_rel;
4806 }
4807 }
4808
4809 /* start boot */
4810 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4811 ~0x00030800UL);
4812
4813 mailbox = readl(&ctl_addr->mail_box_0);
4814
4815 if (mailbox == 0 || Z_FPGA_LOADED(ctl_addr)) {
4816 /* stops CPU and set window to beginning of RAM */
4817 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4818 cy_writel(&cust->cpu_stop, 0);
4819 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4820 udelay(100);
4821 }
4822
4823 plx_init(pdev, irq, ctl_addr);
4824
4825 if (mailbox != 0) {
4826 /* load FPGA */
4827 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4828 base_addr);
4829 if (retval)
4830 goto err_rel;
4831 if (!Z_FPGA_LOADED(ctl_addr)) {
4832 dev_err(&pdev->dev, "fw upload successful, but fw is "
4833 "not loaded\n");
4834 goto err_rel;
4835 }
4836 }
4837
4838 /* stops CPU and set window to beginning of RAM */
4839 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4840 cy_writel(&cust->cpu_stop, 0);
4841 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4842 udelay(100);
4843
4844 /* clear memory */
Jiri Slabyc4923b42007-07-17 04:05:17 -07004845 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
Jiri Slaby054f5b02007-07-17 04:05:16 -07004846 cy_writeb(tmp, 255);
4847 if (mailbox != 0) {
4848 /* set window to last 512K of RAM */
4849 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
Jiri Slabyc4923b42007-07-17 04:05:17 -07004850 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
Jiri Slaby054f5b02007-07-17 04:05:16 -07004851 cy_writeb(tmp, 255);
4852 /* set window to beginning of RAM */
4853 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
Jiri Slaby054f5b02007-07-17 04:05:16 -07004854 }
4855
4856 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4857 release_firmware(fw);
4858 if (retval)
4859 goto err;
4860
4861 /* finish boot and start boards */
4862 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4863 cy_writel(&cust->cpu_start, 0);
4864 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4865 i = 0;
4866 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4867 msleep(100);
4868 if (status != ZFIRM_ID) {
4869 if (status == ZFIRM_HLT) {
4870 dev_err(&pdev->dev, "you need an external power supply "
4871 "for this number of ports. Firmware halted and "
4872 "board reset.\n");
4873 retval = -EIO;
4874 goto err;
4875 }
4876 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4877 "some more time\n", status);
4878 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
4879 i++ < 200)
4880 msleep(100);
4881 if (status != ZFIRM_ID) {
4882 dev_err(&pdev->dev, "Board not started in 20 seconds! "
4883 "Giving up. (fid->signature = 0x%x)\n",
4884 status);
4885 dev_info(&pdev->dev, "*** Warning ***: if you are "
4886 "upgrading the FW, please power cycle the "
4887 "system before loading the new FW to the "
4888 "Cyclades-Z.\n");
4889
4890 if (Z_FPGA_LOADED(ctl_addr))
4891 plx_init(pdev, irq, ctl_addr);
4892
4893 retval = -EIO;
4894 goto err;
4895 }
4896 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
4897 i / 10);
4898 }
4899 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
4900
4901 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
4902 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
4903 base_addr + readl(&fid->zfwctrl_addr));
4904
4905 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
4906 readl(&pt_zfwctrl->board_ctrl.fw_version),
4907 readl(&pt_zfwctrl->board_ctrl.n_channel));
4908
4909 if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) {
4910 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
4911 "check the connection between the Z host card and the "
4912 "serial expanders.\n");
4913
4914 if (Z_FPGA_LOADED(ctl_addr))
4915 plx_init(pdev, irq, ctl_addr);
4916
4917 dev_info(&pdev->dev, "Null number of ports detected. Board "
4918 "reset.\n");
4919 retval = 0;
4920 goto err;
4921 }
4922
4923 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
4924 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
4925
4926 /*
4927 Early firmware failed to start looking for commands.
4928 This enables firmware interrupts for those commands.
4929 */
4930 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4931 (1 << 17));
4932 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4933 0x00030800UL);
4934
4935 plx_init(pdev, irq, ctl_addr);
4936
4937 return 0;
4938err_rel:
4939 release_firmware(fw);
4940err:
4941 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004942}
4943
Jiri Slaby58936d82007-05-08 00:36:13 -07004944static int __devinit cy_pci_probe(struct pci_dev *pdev,
4945 const struct pci_device_id *ent)
4946{
Jiri Slaby31375532007-05-08 00:37:04 -07004947 void __iomem *addr0 = NULL, *addr2 = NULL;
4948 char *card_name = NULL;
4949 u32 mailbox;
4950 unsigned int device_id, nchan = 0, card_no, i;
4951 unsigned char plx_ver;
4952 int retval, irq;
Jiri Slaby58936d82007-05-08 00:36:13 -07004953
4954 retval = pci_enable_device(pdev);
4955 if (retval) {
4956 dev_err(&pdev->dev, "cannot enable device\n");
Jiri Slaby31375532007-05-08 00:37:04 -07004957 goto err;
Jiri Slaby58936d82007-05-08 00:36:13 -07004958 }
4959
4960 /* read PCI configuration area */
Jiri Slaby31375532007-05-08 00:37:04 -07004961 irq = pdev->irq;
Jiri Slaby58936d82007-05-08 00:36:13 -07004962 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4963
Jiri Slaby31375532007-05-08 00:37:04 -07004964#if defined(__alpha__)
4965 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4966 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
4967 "addresses on Alpha systems.\n");
4968 retval = -EIO;
4969 goto err_dis;
4970 }
4971#endif
4972 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4973 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4974 "addresses\n");
4975 retval = -EIO;
4976 goto err_dis;
4977 }
4978
4979 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4980 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4981 "it...\n");
4982 pdev->resource[2].flags &= ~IORESOURCE_IO;
4983 }
4984
4985 retval = pci_request_regions(pdev, "cyclades");
4986 if (retval) {
4987 dev_err(&pdev->dev, "failed to reserve resources\n");
4988 goto err_dis;
4989 }
4990
4991 retval = -EIO;
Jiri Slaby58936d82007-05-08 00:36:13 -07004992 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4993 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
Jiri Slaby31375532007-05-08 00:37:04 -07004994 card_name = "Cyclom-Y";
Jiri Slaby58936d82007-05-08 00:36:13 -07004995
Jiri Slaby31375532007-05-08 00:37:04 -07004996 addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
4997 if (addr0 == NULL) {
4998 dev_err(&pdev->dev, "can't remap ctl region\n");
4999 goto err_reg;
5000 }
5001 addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
5002 if (addr2 == NULL) {
5003 dev_err(&pdev->dev, "can't remap base region\n");
5004 goto err_unmap;
Jiri Slaby58936d82007-05-08 00:36:13 -07005005 }
5006
Jiri Slaby31375532007-05-08 00:37:04 -07005007 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
5008 if (nchan == 0) {
Jiri Slaby21719192007-05-08 00:36:42 -07005009 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
5010 "Serial-Modules\n");
Jiri Slaby58936d82007-05-08 00:36:13 -07005011 return -EIO;
5012 }
Jiri Slaby31375532007-05-08 00:37:04 -07005013 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
5014 struct RUNTIME_9060 __iomem *ctl_addr;
5015
5016 ctl_addr = addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
5017 if (addr0 == NULL) {
5018 dev_err(&pdev->dev, "can't remap ctl region\n");
5019 goto err_reg;
Jiri Slaby58936d82007-05-08 00:36:13 -07005020 }
5021
Jiri Slaby31375532007-05-08 00:37:04 -07005022 /* Disable interrupts on the PLX before resetting it */
Jiri Slaby054f5b02007-07-17 04:05:16 -07005023 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900);
Jiri Slaby31375532007-05-08 00:37:04 -07005024
Jiri Slaby054f5b02007-07-17 04:05:16 -07005025 plx_init(pdev, irq, addr0);
Jiri Slaby31375532007-05-08 00:37:04 -07005026
5027 mailbox = (u32)readl(&ctl_addr->mail_box_0);
5028
5029 addr2 = pci_iomap(pdev, 2, mailbox == ZE_V1 ?
5030 CyPCI_Ze_win : CyPCI_Zwin);
5031 if (addr2 == NULL) {
5032 dev_err(&pdev->dev, "can't remap base region\n");
5033 goto err_unmap;
5034 }
5035
5036 if (mailbox == ZE_V1) {
5037 card_name = "Cyclades-Ze";
5038
5039 readl(&ctl_addr->mail_box_0);
5040 nchan = ZE_V1_NPORTS;
5041 } else {
5042 card_name = "Cyclades-8Zo";
5043
5044#ifdef CY_PCI_DEBUG
5045 if (mailbox == ZO_V1) {
5046 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5047 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5048 "id %lx, ver %lx\n", (ulong)(0xff &
5049 readl(&((struct CUSTOM_REG *)addr2)->
5050 fpga_id)), (ulong)(0xff &
5051 readl(&((struct CUSTOM_REG *)addr2)->
5052 fpga_version)));
5053 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5054 } else {
5055 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5056 "Cyclades-Z board. FPGA not loaded\n");
5057 }
5058#endif
5059 /* The following clears the firmware id word. This
5060 ensures that the driver will not attempt to talk to
5061 the board until it has been properly initialized.
5062 */
5063 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5064 cy_writel(addr2 + ID_ADDRESS, 0L);
5065
Jiri Slaby054f5b02007-07-17 04:05:16 -07005066 retval = cyz_load_fw(pdev, addr2, addr0, irq);
5067 if (retval)
5068 goto err_unmap;
Jiri Slaby31375532007-05-08 00:37:04 -07005069 /* This must be a Cyclades-8Zo/PCI. The extendable
5070 version will have a different device_id and will
5071 be allocated its maximum number of ports. */
5072 nchan = 8;
5073 }
5074 }
5075
5076 if ((cy_next_channel + nchan) > NR_PORTS) {
5077 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5078 "channels are available. Change NR_PORTS in "
5079 "cyclades.c and recompile kernel.\n");
5080 goto err_unmap;
5081 }
5082 /* fill the next cy_card structure available */
5083 for (card_no = 0; card_no < NR_CARDS; card_no++) {
5084 if (cy_card[card_no].base_addr == NULL)
5085 break;
5086 }
5087 if (card_no == NR_CARDS) { /* no more cy_cards available */
5088 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5089 "more cards can be used. Change NR_CARDS in "
5090 "cyclades.c and recompile kernel.\n");
5091 goto err_unmap;
5092 }
5093
5094 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5095 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
Jiri Slaby58936d82007-05-08 00:36:13 -07005096 /* allocate IRQ */
Jiri Slaby31375532007-05-08 00:37:04 -07005097 retval = request_irq(irq, cyy_interrupt,
5098 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
Jiri Slaby58936d82007-05-08 00:36:13 -07005099 if (retval) {
Jiri Slaby21719192007-05-08 00:36:42 -07005100 dev_err(&pdev->dev, "could not allocate IRQ\n");
Jiri Slaby31375532007-05-08 00:37:04 -07005101 goto err_unmap;
Jiri Slaby58936d82007-05-08 00:36:13 -07005102 }
Jiri Slaby31375532007-05-08 00:37:04 -07005103 cy_card[card_no].num_chips = nchan / 4;
5104 } else {
5105#ifdef CONFIG_CYZ_INTR
5106 /* allocate IRQ only if board has an IRQ */
5107 if (irq != 0 && irq != 255) {
5108 retval = request_irq(irq, cyz_interrupt,
5109 IRQF_SHARED, "Cyclades-Z",
5110 &cy_card[card_no]);
5111 if (retval) {
5112 dev_err(&pdev->dev, "could not allocate IRQ\n");
5113 goto err_unmap;
5114 }
5115 }
5116#endif /* CONFIG_CYZ_INTR */
Jiri Slaby65f76a82007-10-18 03:06:22 -07005117 cy_card[card_no].num_chips = (unsigned int)-1;
Jiri Slaby31375532007-05-08 00:37:04 -07005118 }
Jiri Slaby58936d82007-05-08 00:36:13 -07005119
Jiri Slaby31375532007-05-08 00:37:04 -07005120 /* set cy_card */
5121 cy_card[card_no].base_addr = addr2;
5122 cy_card[card_no].ctl_addr = addr0;
5123 cy_card[card_no].irq = irq;
5124 cy_card[card_no].bus_index = 1;
5125 cy_card[card_no].first_line = cy_next_channel;
5126 retval = cy_init_card(&cy_card[card_no]);
5127 if (retval)
5128 goto err_null;
Jiri Slaby58936d82007-05-08 00:36:13 -07005129
Jiri Slaby31375532007-05-08 00:37:04 -07005130 pci_set_drvdata(pdev, &cy_card[card_no]);
5131
5132 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5133 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
Jiri Slaby58936d82007-05-08 00:36:13 -07005134 /* enable interrupts in the PCI interface */
Jiri Slaby31375532007-05-08 00:37:04 -07005135 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
Jiri Slaby58936d82007-05-08 00:36:13 -07005136 switch (plx_ver) {
5137 case PLX_9050:
5138
Jiri Slaby31375532007-05-08 00:37:04 -07005139 cy_writeb(addr0 + 0x4c, 0x43);
Jiri Slaby58936d82007-05-08 00:36:13 -07005140 break;
5141
5142 case PLX_9060:
5143 case PLX_9080:
5144 default: /* Old boards, use PLX_9060 */
Jiri Slaby054f5b02007-07-17 04:05:16 -07005145 plx_init(pdev, irq, addr0);
Jiri Slaby31375532007-05-08 00:37:04 -07005146 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
Jiri Slaby58936d82007-05-08 00:36:13 -07005147 break;
5148 }
Jiri Slaby58936d82007-05-08 00:36:13 -07005149 }
5150
Jiri Slaby31375532007-05-08 00:37:04 -07005151 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5152 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5153 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5154 tty_register_device(cy_serial_driver, i, &pdev->dev);
5155 cy_next_channel += nchan;
5156
Jiri Slaby58936d82007-05-08 00:36:13 -07005157 return 0;
Jiri Slaby31375532007-05-08 00:37:04 -07005158err_null:
5159 cy_card[card_no].base_addr = NULL;
5160 free_irq(irq, &cy_card[card_no]);
5161err_unmap:
5162 pci_iounmap(pdev, addr0);
5163 if (addr2)
5164 pci_iounmap(pdev, addr2);
5165err_reg:
5166 pci_release_regions(pdev);
5167err_dis:
5168 pci_disable_device(pdev);
5169err:
5170 return retval;
Jiri Slaby58936d82007-05-08 00:36:13 -07005171}
Jiri Slaby58936d82007-05-08 00:36:13 -07005172
Jiri Slaby6747cd92007-05-08 00:36:34 -07005173static void __devexit cy_pci_remove(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005174{
Jiri Slaby38d09092007-05-08 00:36:10 -07005175 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
Jiri Slabyf3851e72007-05-08 00:36:16 -07005176 unsigned int i;
Jiri Slaby38d09092007-05-08 00:36:10 -07005177
Jiri Slaby85c93fa2007-05-08 00:36:23 -07005178 /* non-Z with old PLX */
Jiri Slabyc2ad4c72007-05-08 00:36:32 -07005179 if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5180 PLX_9050)
Jiri Slaby85c93fa2007-05-08 00:36:23 -07005181 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5182 else
5183#ifndef CONFIG_CYZ_INTR
Jiri Slabyc2ad4c72007-05-08 00:36:32 -07005184 if (!IS_CYC_Z(*cinfo))
Jiri Slaby85c93fa2007-05-08 00:36:23 -07005185#endif
5186 cy_writew(cinfo->ctl_addr + 0x68,
5187 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5188
Jiri Slaby38d09092007-05-08 00:36:10 -07005189 pci_iounmap(pdev, cinfo->base_addr);
5190 if (cinfo->ctl_addr)
5191 pci_iounmap(pdev, cinfo->ctl_addr);
5192 if (cinfo->irq
5193#ifndef CONFIG_CYZ_INTR
Jiri Slabyc2ad4c72007-05-08 00:36:32 -07005194 && !IS_CYC_Z(*cinfo)
Jiri Slaby38d09092007-05-08 00:36:10 -07005195#endif /* CONFIG_CYZ_INTR */
5196 )
5197 free_irq(cinfo->irq, cinfo);
5198 pci_release_regions(pdev);
5199
5200 cinfo->base_addr = NULL;
Jiri Slaby6ad1ccc2007-05-08 00:36:22 -07005201 for (i = cinfo->first_line; i < cinfo->first_line +
5202 cinfo->nports; i++)
5203 tty_unregister_device(cy_serial_driver, i);
Jiri Slabydd025c02007-05-08 00:37:02 -07005204 cinfo->nports = 0;
5205 kfree(cinfo->ports);
Jiri Slaby38d09092007-05-08 00:36:10 -07005206}
5207
Jiri Slaby6747cd92007-05-08 00:36:34 -07005208static struct pci_driver cy_pci_driver = {
5209 .name = "cyclades",
5210 .id_table = cy_pci_dev_id,
5211 .probe = cy_pci_probe,
5212 .remove = __devexit_p(cy_pci_remove)
5213};
5214#endif
5215
Jiri Slaby02f11752006-12-08 02:39:28 -08005216static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07005217cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
Jiri Slaby02f11752006-12-08 02:39:28 -08005218 int *eof, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005219{
Jiri Slaby02f11752006-12-08 02:39:28 -08005220 struct cyclades_port *info;
Jiri Slabydd025c02007-05-08 00:37:02 -07005221 unsigned int i, j;
Jiri Slaby02f11752006-12-08 02:39:28 -08005222 int len = 0;
5223 off_t begin = 0;
5224 off_t pos = 0;
5225 int size;
5226 __u32 cur_jifs = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005227
Jiri Slaby02f11752006-12-08 02:39:28 -08005228 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5229 "IdleIn Overruns Ldisc\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07005230
Jiri Slaby02f11752006-12-08 02:39:28 -08005231 pos += size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005232 len += size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005233
Jiri Slaby02f11752006-12-08 02:39:28 -08005234 /* Output one line for each known port */
Jiri Slabydd025c02007-05-08 00:37:02 -07005235 for (i = 0; i < NR_CARDS; i++)
5236 for (j = 0; j < cy_card[i].nports; j++) {
5237 info = &cy_card[i].ports[j];
Jiri Slaby02f11752006-12-08 02:39:28 -08005238
Alan Cox77451e52008-07-16 21:57:02 +01005239 if (info->port.count)
Jiri Slabydd025c02007-05-08 00:37:02 -07005240 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5241 "%10lu %8lu %9lu %6ld\n", info->line,
5242 (cur_jifs - info->idle_stats.in_use) /
5243 HZ, info->idle_stats.xmit_bytes,
5244 (cur_jifs - info->idle_stats.xmit_idle)/
5245 HZ, info->idle_stats.recv_bytes,
5246 (cur_jifs - info->idle_stats.recv_idle)/
5247 HZ, info->idle_stats.overruns,
Alan Coxa352def2008-07-16 21:53:12 +01005248 /* FIXME: double check locking */
Alan Cox77451e52008-07-16 21:57:02 +01005249 (long)info->port.tty->ldisc.ops->num);
Jiri Slabydd025c02007-05-08 00:37:02 -07005250 else
5251 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5252 "%10lu %8lu %9lu %6ld\n",
5253 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5254 len += size;
5255 pos = begin + len;
Jiri Slaby02f11752006-12-08 02:39:28 -08005256
Jiri Slabydd025c02007-05-08 00:37:02 -07005257 if (pos < offset) {
5258 len = 0;
5259 begin = pos;
5260 }
5261 if (pos > offset + length)
5262 goto done;
Jiri Slaby02f11752006-12-08 02:39:28 -08005263 }
Jiri Slaby02f11752006-12-08 02:39:28 -08005264 *eof = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005265done:
Jiri Slaby02f11752006-12-08 02:39:28 -08005266 *start = buf + (offset - begin); /* Start of wanted data */
5267 len -= (offset - begin); /* Start slop */
5268 if (len > length)
5269 len = length; /* Ending slop */
5270 if (len < 0)
5271 len = 0;
5272 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005273}
5274
5275/* The serial driver boot-time initialization code!
5276 Hardware I/O ports are mapped to character special devices on a
5277 first found, first allocated manner. That is, this code searches
5278 for Cyclom cards in the system. As each is found, it is probed
5279 to discover how many chips (and thus how many ports) are present.
5280 These ports are mapped to the tty ports 32 and upward in monotonic
5281 fashion. If an 8-port card is replaced with a 16-port card, the
5282 port mapping on a following card will shift.
5283
5284 This approach is different from what is used in the other serial
5285 device driver because the Cyclom is more properly a multiplexer,
5286 not just an aggregation of serial ports on one card.
5287
5288 If there are more cards with more ports than have been
5289 statically allocated above, a warning is printed and the
5290 extra ports are ignored.
5291 */
5292
Jeff Dikeb68e31d2006-10-02 02:17:18 -07005293static const struct tty_operations cy_ops = {
Jiri Slaby02f11752006-12-08 02:39:28 -08005294 .open = cy_open,
5295 .close = cy_close,
5296 .write = cy_write,
5297 .put_char = cy_put_char,
5298 .flush_chars = cy_flush_chars,
5299 .write_room = cy_write_room,
5300 .chars_in_buffer = cy_chars_in_buffer,
5301 .flush_buffer = cy_flush_buffer,
5302 .ioctl = cy_ioctl,
5303 .throttle = cy_throttle,
5304 .unthrottle = cy_unthrottle,
5305 .set_termios = cy_set_termios,
5306 .stop = cy_stop,
5307 .start = cy_start,
5308 .hangup = cy_hangup,
5309 .break_ctl = cy_break,
5310 .wait_until_sent = cy_wait_until_sent,
5311 .read_proc = cyclades_get_proc_info,
5312 .tiocmget = cy_tiocmget,
5313 .tiocmset = cy_tiocmset,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005314};
5315
Jiri Slaby02f11752006-12-08 02:39:28 -08005316static int __init cy_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005317{
Jiri Slabydd025c02007-05-08 00:37:02 -07005318 unsigned int nboards;
Jiri Slaby9dacf3b2007-05-08 00:36:20 -07005319 int retval = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005320
Jiri Slaby02f11752006-12-08 02:39:28 -08005321 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5322 if (!cy_serial_driver)
Jiri Slaby9dacf3b2007-05-08 00:36:20 -07005323 goto err;
Jiri Slaby21719192007-05-08 00:36:42 -07005324
5325 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5326 __DATE__, __TIME__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005327
Jiri Slaby02f11752006-12-08 02:39:28 -08005328 /* Initialize the tty_driver structure */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005329
Jiri Slaby02f11752006-12-08 02:39:28 -08005330 cy_serial_driver->owner = THIS_MODULE;
5331 cy_serial_driver->driver_name = "cyclades";
5332 cy_serial_driver->name = "ttyC";
5333 cy_serial_driver->major = CYCLADES_MAJOR;
5334 cy_serial_driver->minor_start = 0;
5335 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5336 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5337 cy_serial_driver->init_termios = tty_std_termios;
5338 cy_serial_driver->init_termios.c_cflag =
5339 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
Jiri Slaby6ad1ccc2007-05-08 00:36:22 -07005340 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
Jiri Slaby02f11752006-12-08 02:39:28 -08005341 tty_set_operations(cy_serial_driver, &cy_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005342
Jiri Slaby9dacf3b2007-05-08 00:36:20 -07005343 retval = tty_register_driver(cy_serial_driver);
5344 if (retval) {
5345 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5346 goto err_frtty;
5347 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005348
Jiri Slaby02f11752006-12-08 02:39:28 -08005349 /* the code below is responsible to find the boards. Each different
5350 type of board has its own detection routine. If a board is found,
5351 the next cy_card structure available is set by the detection
5352 routine. These functions are responsible for checking the
5353 availability of cy_card and cy_port data structures and updating
5354 the cy_next_channel. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005355
Jiri Slaby02f11752006-12-08 02:39:28 -08005356 /* look for isa boards */
Jiri Slaby14a55a62007-05-08 00:36:18 -07005357 nboards = cy_detect_isa();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005358
Jiri Slaby6747cd92007-05-08 00:36:34 -07005359#ifdef CONFIG_PCI
Jiri Slaby02f11752006-12-08 02:39:28 -08005360 /* look for pci boards */
Jiri Slaby6747cd92007-05-08 00:36:34 -07005361 retval = pci_register_driver(&cy_pci_driver);
Jesper Juhld941ea72007-10-18 03:06:23 -07005362 if (retval && !nboards) {
5363 tty_unregister_driver(cy_serial_driver);
5364 goto err_frtty;
5365 }
Jiri Slaby6747cd92007-05-08 00:36:34 -07005366#endif
Jiri Slaby9dacf3b2007-05-08 00:36:20 -07005367
5368 return 0;
Jiri Slaby9dacf3b2007-05-08 00:36:20 -07005369err_frtty:
5370 put_tty_driver(cy_serial_driver);
5371err:
5372 return retval;
Jiri Slaby02f11752006-12-08 02:39:28 -08005373} /* cy_init */
5374
5375static void __exit cy_cleanup_module(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005376{
Jiri Slabydd025c02007-05-08 00:37:02 -07005377 struct cyclades_card *card;
Jiri Slaby65f76a82007-10-18 03:06:22 -07005378 unsigned int i, e1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005379
5380#ifndef CONFIG_CYZ_INTR
Jiri Slabyb7050902007-05-08 00:35:48 -07005381 del_timer_sync(&cyz_timerlist);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005382#endif /* CONFIG_CYZ_INTR */
5383
Alan Cox15ed6cc2008-04-30 00:53:55 -07005384 e1 = tty_unregister_driver(cy_serial_driver);
5385 if (e1)
Jiri Slaby21719192007-05-08 00:36:42 -07005386 printk(KERN_ERR "failed to unregister Cyclades serial "
5387 "driver(%d)\n", e1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005388
Jiri Slaby6747cd92007-05-08 00:36:34 -07005389#ifdef CONFIG_PCI
5390 pci_unregister_driver(&cy_pci_driver);
5391#endif
5392
Jiri Slaby02f11752006-12-08 02:39:28 -08005393 for (i = 0; i < NR_CARDS; i++) {
Jiri Slabydd025c02007-05-08 00:37:02 -07005394 card = &cy_card[i];
5395 if (card->base_addr) {
Jiri Slaby85c93fa2007-05-08 00:36:23 -07005396 /* clear interrupt */
Jiri Slabydd025c02007-05-08 00:37:02 -07005397 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5398 iounmap(card->base_addr);
5399 if (card->ctl_addr)
5400 iounmap(card->ctl_addr);
5401 if (card->irq
Linus Torvalds1da177e2005-04-16 15:20:36 -07005402#ifndef CONFIG_CYZ_INTR
Jiri Slabydd025c02007-05-08 00:37:02 -07005403 && !IS_CYC_Z(*card)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005404#endif /* CONFIG_CYZ_INTR */
Jiri Slaby02f11752006-12-08 02:39:28 -08005405 )
Jiri Slabydd025c02007-05-08 00:37:02 -07005406 free_irq(card->irq, card);
Jiri Slaby65f76a82007-10-18 03:06:22 -07005407 for (e1 = card->first_line; e1 < card->first_line +
Jiri Slabydd025c02007-05-08 00:37:02 -07005408 card->nports; e1++)
Jiri Slaby6ad1ccc2007-05-08 00:36:22 -07005409 tty_unregister_device(cy_serial_driver, e1);
Jiri Slabydd025c02007-05-08 00:37:02 -07005410 kfree(card->ports);
Jiri Slaby02f11752006-12-08 02:39:28 -08005411 }
5412 }
Jiri Slabyf2462bf2007-05-08 00:37:01 -07005413
5414 put_tty_driver(cy_serial_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005415} /* cy_cleanup_module */
5416
5417module_init(cy_init);
5418module_exit(cy_cleanup_module);
5419
5420MODULE_LICENSE("GPL");
Jiri Slabyc8e16932007-05-08 00:37:05 -07005421MODULE_VERSION(CY_VERSION);