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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * This program is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU General Public License
4 * as published by the Free Software Foundation; either version
5 * 2 of the License, or (at your option) any later version.
6 *
7 * Original driver code supplied by Multi-Tech
8 *
9 * Changes
10 * 1/9/98 alan@redhat.com Merge to 2.0.x kernel tree
11 * Obtain and use official major/minors
12 * Loader switched to a misc device
13 * (fixed range check bug as a side effect)
14 * Printk clean up
15 * 9/12/98 alan@redhat.com Rough port to 2.1.x
16 *
17 * 10/6/99 sameer Merged the ISA and PCI drivers to
18 * a new unified driver.
19 *
20 * 3/9/99 sameer Added support for ISI4616 cards.
21 *
22 * 16/9/99 sameer We do not force RTS low anymore.
Jiri Slabyd8d16e42006-01-09 20:54:21 -080023 * This is to prevent the firmware
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 * from getting confused.
25 *
26 * 26/10/99 sameer Cosmetic changes:The driver now
27 * dumps the Port Count information
28 * along with I/O address and IRQ.
29 *
30 * 13/12/99 sameer Fixed the problem with IRQ sharing.
31 *
32 * 10/5/00 sameer Fixed isicom_shutdown_board()
33 * to not lower DTR on all the ports
Jiri Slabyd8d16e42006-01-09 20:54:21 -080034 * when the last port on the card is
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 * closed.
36 *
37 * 10/5/00 sameer Signal mask setup command added
Jiri Slabyd8d16e42006-01-09 20:54:21 -080038 * to isicom_setup_port and
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 * isicom_shutdown_port.
40 *
41 * 24/5/00 sameer The driver is now SMP aware.
Jiri Slabyd8d16e42006-01-09 20:54:21 -080042 *
43 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem
Jiri Slabyd8d16e42006-01-09 20:54:21 -080045 *
46 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 * 03/01/01 anil .s Added support for resetting the
48 * internal modems on ISI cards.
49 *
50 * 08/02/01 anil .s Upgraded the driver for kernel
51 * 2.4.x
52 *
Jiri Slabyd8d16e42006-01-09 20:54:21 -080053 * 11/04/01 Kevin Fixed firmware load problem with
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 * ISIHP-4X card
Jiri Slabyd8d16e42006-01-09 20:54:21 -080055 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 * 30/04/01 anil .s Fixed the remote login through
57 * ISI port problem. Now the link
58 * does not go down before password
59 * prompt.
60 *
61 * 03/05/01 anil .s Fixed the problem with IRQ sharing
62 * among ISI-PCI cards.
63 *
64 * 03/05/01 anil .s Added support to display the version
Jiri Slabyd8d16e42006-01-09 20:54:21 -080065 * info during insmod as well as module
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 * listing by lsmod.
Jiri Slabyd8d16e42006-01-09 20:54:21 -080067 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 * 10/05/01 anil .s Done the modifications to the source
69 * file and Install script so that the
70 * same installation can be used for
71 * 2.2.x and 2.4.x kernel.
72 *
73 * 06/06/01 anil .s Now we drop both dtr and rts during
74 * shutdown_port as well as raise them
75 * during isicom_config_port.
Jiri Slabyd8d16e42006-01-09 20:54:21 -080076 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 * 09/06/01 acme@conectiva.com.br use capable, not suser, do
78 * restore_flags on failure in
79 * isicom_send_break, verify put_user
80 * result
81 *
Jiri Slabyd8d16e42006-01-09 20:54:21 -080082 * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps
83 * Baud index extended to 21
84 *
85 * 20/03/03 ranjeeth Made to work for Linux Advanced server.
86 * Taken care of license warning.
87 *
88 * 10/12/03 Ravindra Made to work for Fedora Core 1 of
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 * Red Hat Distribution
90 *
91 * 06/01/05 Alan Cox Merged the ISI and base kernel strands
92 * into a single 2.6 driver
93 *
94 * ***********************************************************
95 *
Jiri Slabyd8d16e42006-01-09 20:54:21 -080096 * To use this driver you also need the support package. You
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 * can find this in RPM format on
98 * ftp://ftp.linux.org.uk/pub/linux/alan
Jiri Slabyd8d16e42006-01-09 20:54:21 -080099 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 * You can find the original tools for this direct from Multitech
101 * ftp://ftp.multitech.com/ISI-Cards/
102 *
103 * Having installed the cards the module options (/etc/modprobe.conf)
104 *
105 * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4
106 *
107 * Omit those entries for boards you don't have installed.
108 *
109 * TODO
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 * Merge testing
111 * 64-bit verification
112 */
113
114#include <linux/module.h>
Jiri Slabye65c1db2006-01-09 20:54:25 -0800115#include <linux/firmware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116#include <linux/kernel.h>
117#include <linux/tty.h>
Alan Cox33f0f882006-01-09 20:54:13 -0800118#include <linux/tty_flip.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119#include <linux/termios.h>
120#include <linux/fs.h>
121#include <linux/sched.h>
122#include <linux/serial.h>
123#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124#include <linux/interrupt.h>
125#include <linux/timer.h>
126#include <linux/delay.h>
127#include <linux/ioport.h>
128
129#include <asm/uaccess.h>
130#include <asm/io.h>
131#include <asm/system.h>
132
133#include <linux/pci.h>
134
135#include <linux/isicom.h>
136
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800137#define InterruptTheCard(base) outw(0, (base) + 0xc)
138#define ClearInterrupt(base) inw((base) + 0x0a)
139
Jiri Slaby73b52572007-05-08 00:36:29 -0700140#define pr_dbg(str...) pr_debug("ISICOM: " str)
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800141#ifdef DEBUG
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800142#define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
143#else
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800144#define isicom_paranoia_check(a, b, c) 0
145#endif
146
Jiri Slaby9ac09482006-01-09 20:54:24 -0800147static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
148static void __devexit isicom_remove(struct pci_dev *);
149
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150static struct pci_device_id isicom_pci_tbl[] = {
Jiri Slaby9ac09482006-01-09 20:54:24 -0800151 { PCI_DEVICE(VENDOR_ID, 0x2028) },
152 { PCI_DEVICE(VENDOR_ID, 0x2051) },
153 { PCI_DEVICE(VENDOR_ID, 0x2052) },
154 { PCI_DEVICE(VENDOR_ID, 0x2053) },
155 { PCI_DEVICE(VENDOR_ID, 0x2054) },
156 { PCI_DEVICE(VENDOR_ID, 0x2055) },
157 { PCI_DEVICE(VENDOR_ID, 0x2056) },
158 { PCI_DEVICE(VENDOR_ID, 0x2057) },
159 { PCI_DEVICE(VENDOR_ID, 0x2058) },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 { 0 }
161};
162MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
163
Jiri Slaby9ac09482006-01-09 20:54:24 -0800164static struct pci_driver isicom_driver = {
165 .name = "isicom",
166 .id_table = isicom_pci_tbl,
167 .probe = isicom_probe,
168 .remove = __devexit_p(isicom_remove)
169};
170
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171static int prev_card = 3; /* start servicing isi_card[0] */
172static struct tty_driver *isicom_normal;
173
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174static void isicom_tx(unsigned long _data);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800175static void isicom_start(struct tty_struct *tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176
Jiri Slaby34b55b82006-12-08 02:38:55 -0800177static DEFINE_TIMER(tx, isicom_tx, 0, 0);
178
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179/* baud index mappings from linux defns to isi */
180
181static signed char linuxb_to_isib[] = {
Jiri Slaby7edc1362007-02-10 01:44:54 -0800182 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183};
184
185struct isi_board {
Jiri Slaby8070e352006-01-09 20:54:22 -0800186 unsigned long base;
Jiri Slaby4969b3a2007-07-17 04:05:18 -0700187 int irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 unsigned char port_count;
189 unsigned short status;
Jiri Slabya547dfe2006-01-09 20:54:26 -0800190 unsigned short port_status; /* each bit for each port */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 unsigned short shift_count;
192 struct isi_port * ports;
193 signed char count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
195 unsigned long flags;
Jiri Slaby938a7022006-12-08 02:38:52 -0800196 unsigned int index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197};
198
199struct isi_port {
200 unsigned short magic;
201 unsigned int flags;
202 int count;
203 int blocked_open;
204 int close_delay;
Jiri Slaby8070e352006-01-09 20:54:22 -0800205 u16 channel;
206 u16 status;
207 u16 closing_wait;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 struct isi_board * card;
209 struct tty_struct * tty;
210 wait_queue_head_t close_wait;
211 wait_queue_head_t open_wait;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 unsigned char * xmit_buf;
213 int xmit_head;
214 int xmit_tail;
215 int xmit_cnt;
216};
217
218static struct isi_board isi_card[BOARD_COUNT];
219static struct isi_port isi_ports[PORT_COUNT];
220
221/*
222 * Locking functions for card level locking. We need to own both
223 * the kernel lock for the card and have the card in a position that
224 * it wants to talk.
225 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800226
Jiri Slaby4969b3a2007-07-17 04:05:18 -0700227static inline int WaitTillCardIsFree(unsigned long base)
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800228{
229 unsigned int count = 0;
230 unsigned int a = in_atomic(); /* do we run under spinlock? */
231
232 while (!(inw(base + 0xe) & 0x1) && count++ < 100)
233 if (a)
234 mdelay(1);
235 else
236 msleep(1);
237
238 return !(inw(base + 0xe) & 0x1);
239}
240
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241static int lock_card(struct isi_board *card)
242{
Jiri Slaby8070e352006-01-09 20:54:22 -0800243 unsigned long base = card->base;
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700244 unsigned int retries, a;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700246 for (retries = 0; retries < 10; retries++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 spin_lock_irqsave(&card->card_lock, card->flags);
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700248 for (a = 0; a < 10; a++) {
249 if (inw(base + 0xe) & 0x1)
250 return 1;
251 udelay(10);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 }
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700253 spin_unlock_irqrestore(&card->card_lock, card->flags);
254 msleep(10);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800256 printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n",
257 card->base);
258
Adrian Bunk04187262006-06-30 18:23:04 +0200259 return 0; /* Failed to acquire the card! */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260}
261
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262static void unlock_card(struct isi_board *card)
263{
264 spin_unlock_irqrestore(&card->card_lock, card->flags);
265}
266
267/*
268 * ISI Card specific ops ...
269 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800270
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800271/* card->lock HAS to be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800272static void raise_dtr(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800274 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800275 unsigned long base = card->base;
276 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800278 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 return;
280
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800281 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 outw(0x0504, base);
283 InterruptTheCard(base);
284 port->status |= ISI_DTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285}
286
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800287/* card->lock HAS to be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800288static inline void drop_dtr(struct isi_port *port)
289{
290 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800291 unsigned long base = card->base;
292 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800294 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 return;
296
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800297 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 outw(0x0404, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800299 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 port->status &= ~ISI_DTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301}
302
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800303/* card->lock HAS to be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800304static inline void raise_rts(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800306 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800307 unsigned long base = card->base;
308 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800310 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 return;
312
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800313 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 outw(0x0a04, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800315 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 port->status |= ISI_RTS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317}
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800318
319/* card->lock HAS to be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800320static inline void drop_rts(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800322 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800323 unsigned long base = card->base;
324 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800326 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 return;
328
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800329 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 outw(0x0804, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800331 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 port->status &= ~ISI_RTS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333}
334
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800335/* card->lock MUST NOT be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800336static inline void raise_dtr_rts(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800338 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800339 unsigned long base = card->base;
340 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
342 if (!lock_card(card))
343 return;
344
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800345 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 outw(0x0f04, base);
347 InterruptTheCard(base);
348 port->status |= (ISI_DTR | ISI_RTS);
349 unlock_card(card);
350}
351
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800352/* card->lock HAS to be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800353static void drop_dtr_rts(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800355 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800356 unsigned long base = card->base;
357 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800359 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 return;
361
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800362 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 outw(0x0c04, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800364 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 port->status &= ~(ISI_RTS | ISI_DTR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366}
367
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368/*
369 * ISICOM Driver specific routines ...
370 *
371 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800372
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800373static inline int __isicom_paranoia_check(struct isi_port const *port,
374 char *name, const char *routine)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 if (!port) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800377 printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for "
378 "dev %s in %s.\n", name, routine);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 return 1;
380 }
381 if (port->magic != ISICOM_MAGIC) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800382 printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for "
383 "dev %s in %s.\n", name, routine);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 return 1;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800385 }
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800386
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 return 0;
388}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800389
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390/*
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800391 * Transmitter.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 *
393 * We shovel data into the card buffers on a regular basis. The card
394 * will do the rest of the work for us.
395 */
396
397static void isicom_tx(unsigned long _data)
398{
Jiri Slaby4969b3a2007-07-17 04:05:18 -0700399 unsigned long flags, base;
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700400 unsigned int retries;
Jiri Slaby4969b3a2007-07-17 04:05:18 -0700401 short count = (BOARD_COUNT-1), card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 short txcount, wrd, residue, word_count, cnt;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800403 struct isi_port *port;
404 struct tty_struct *tty;
405
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 /* find next active board */
407 card = (prev_card + 1) & 0x0003;
408 while(count-- > 0) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800409 if (isi_card[card].status & BOARD_ACTIVE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 break;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800411 card = (card + 1) & 0x0003;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 }
413 if (!(isi_card[card].status & BOARD_ACTIVE))
414 goto sched_again;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800415
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 prev_card = card;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800417
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 count = isi_card[card].port_count;
419 port = isi_card[card].ports;
420 base = isi_card[card].base;
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700421
422 spin_lock_irqsave(&isi_card[card].card_lock, flags);
423 for (retries = 0; retries < 100; retries++) {
424 if (inw(base + 0xe) & 0x1)
425 break;
426 udelay(2);
427 }
428 if (retries >= 100)
429 goto unlock;
430
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 for (;count > 0;count--, port++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 /* port not active or tx disabled to force flow control */
433 if (!(port->flags & ASYNC_INITIALIZED) ||
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800434 !(port->status & ISI_TXOK))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 continue;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800436
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 tty = port->tty;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800438
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700439 if (tty == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 continue;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800441
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700443 if (txcount <= 0 || tty->stopped || tty->hw_stopped)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 continue;
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700445
446 if (!(inw(base + 0x02) & (1 << port->channel)))
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800447 continue;
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700448
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800449 pr_dbg("txing %d bytes, port%d.\n", txcount,
450 port->channel + 1);
451 outw((port->channel << isi_card[card].shift_count) | txcount,
452 base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 residue = NO;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800454 wrd = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 while (1) {
Jiri Slabya547dfe2006-01-09 20:54:26 -0800456 cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
457 - port->xmit_tail));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 if (residue == YES) {
459 residue = NO;
460 if (cnt > 0) {
Jiri Slabya547dfe2006-01-09 20:54:26 -0800461 wrd |= (port->xmit_buf[port->xmit_tail]
462 << 8);
463 port->xmit_tail = (port->xmit_tail + 1)
464 & (SERIAL_XMIT_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 port->xmit_cnt--;
466 txcount--;
467 cnt--;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800468 outw(wrd, base);
Jiri Slabya547dfe2006-01-09 20:54:26 -0800469 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 outw(wrd, base);
471 break;
472 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800473 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 if (cnt <= 0) break;
475 word_count = cnt >> 1;
Jiri Slabya547dfe2006-01-09 20:54:26 -0800476 outsw(base, port->xmit_buf+port->xmit_tail,word_count);
477 port->xmit_tail = (port->xmit_tail
478 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 txcount -= (word_count << 1);
480 port->xmit_cnt -= (word_count << 1);
481 if (cnt & 0x0001) {
482 residue = YES;
483 wrd = port->xmit_buf[port->xmit_tail];
Jiri Slabya547dfe2006-01-09 20:54:26 -0800484 port->xmit_tail = (port->xmit_tail + 1)
485 & (SERIAL_XMIT_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 port->xmit_cnt--;
487 txcount--;
488 }
489 }
490
491 InterruptTheCard(base);
492 if (port->xmit_cnt <= 0)
493 port->status &= ~ISI_TXOK;
494 if (port->xmit_cnt <= WAKEUP_CHARS)
Jiri Slaby0aa5de82007-02-10 01:44:47 -0800495 tty_wakeup(tty);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800496 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700498unlock:
499 spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800500 /* schedule another tx for hopefully in about 10ms */
501sched_again:
Jiri Slaby34b55b82006-12-08 02:38:55 -0800502 mod_timer(&tx, jiffies + msecs_to_jiffies(10));
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800503}
504
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505/*
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800506 * Main interrupt handler routine
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800508
David Howells7d12e782006-10-05 14:55:46 +0100509static irqreturn_t isicom_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510{
Jiri Slaby8070e352006-01-09 20:54:22 -0800511 struct isi_board *card = dev_id;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800512 struct isi_port *port;
513 struct tty_struct *tty;
Jiri Slaby8070e352006-01-09 20:54:22 -0800514 unsigned long base;
515 u16 header, word_count, count, channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 short byte_count;
Alan Cox33f0f882006-01-09 20:54:13 -0800517 unsigned char *rp;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800518
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 if (!card || !(card->status & FIRMWARE_LOADED))
520 return IRQ_NONE;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800521
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 base = card->base;
Jiri Slabycb4a10c2007-02-10 01:44:53 -0800523
524 /* did the card interrupt us? */
525 if (!(inw(base + 0x0e) & 0x02))
526 return IRQ_NONE;
527
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 spin_lock(&card->card_lock);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800529
Jiri Slaby18234f82006-12-08 02:38:51 -0800530 /*
531 * disable any interrupts from the PCI card and lower the
532 * interrupt line
533 */
534 outw(0x8000, base+0x04);
535 ClearInterrupt(base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800536
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 inw(base); /* get the dummy word out */
538 header = inw(base);
539 channel = (header & 0x7800) >> card->shift_count;
540 byte_count = header & 0xff;
541
542 if (channel + 1 > card->port_count) {
Jiri Slabya547dfe2006-01-09 20:54:26 -0800543 printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): "
544 "%d(channel) > port_count.\n", base, channel+1);
Jiri Slaby18234f82006-12-08 02:38:51 -0800545 outw(0x0000, base+0x04); /* enable interrupts */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 spin_unlock(&card->card_lock);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800547 return IRQ_HANDLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 }
549 port = card->ports + channel;
550 if (!(port->flags & ASYNC_INITIALIZED)) {
Jiri Slaby18234f82006-12-08 02:38:51 -0800551 outw(0x0000, base+0x04); /* enable interrupts */
Jiri Slaby174f1302007-02-10 01:44:52 -0800552 spin_unlock(&card->card_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 return IRQ_HANDLED;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800554 }
555
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 tty = port->tty;
557 if (tty == NULL) {
558 word_count = byte_count >> 1;
559 while(byte_count > 1) {
560 inw(base);
561 byte_count -= 2;
562 }
563 if (byte_count & 0x01)
564 inw(base);
Jiri Slaby18234f82006-12-08 02:38:51 -0800565 outw(0x0000, base+0x04); /* enable interrupts */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 spin_unlock(&card->card_lock);
567 return IRQ_HANDLED;
568 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800569
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 if (header & 0x8000) { /* Status Packet */
571 header = inw(base);
572 switch(header & 0xff) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800573 case 0: /* Change in EIA signals */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800574 if (port->flags & ASYNC_CHECK_CD) {
575 if (port->status & ISI_DCD) {
576 if (!(header & ISI_DCD)) {
577 /* Carrier has been lost */
Jiri Slabya547dfe2006-01-09 20:54:26 -0800578 pr_dbg("interrupt: DCD->low.\n"
579 );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 port->status &= ~ISI_DCD;
Jiri Slaby0aa5de82007-02-10 01:44:47 -0800581 tty_hangup(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800583 } else if (header & ISI_DCD) {
584 /* Carrier has been detected */
585 pr_dbg("interrupt: DCD->high.\n");
586 port->status |= ISI_DCD;
587 wake_up_interruptible(&port->open_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800589 } else {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800590 if (header & ISI_DCD)
591 port->status |= ISI_DCD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 else
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800593 port->status &= ~ISI_DCD;
594 }
595
596 if (port->flags & ASYNC_CTS_FLOW) {
597 if (port->tty->hw_stopped) {
598 if (header & ISI_CTS) {
599 port->tty->hw_stopped = 0;
600 /* start tx ing */
Jiri Slabya547dfe2006-01-09 20:54:26 -0800601 port->status |= (ISI_TXOK
602 | ISI_CTS);
Jiri Slaby0aa5de82007-02-10 01:44:47 -0800603 tty_wakeup(tty);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800604 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800605 } else if (!(header & ISI_CTS)) {
606 port->tty->hw_stopped = 1;
607 /* stop tx ing */
608 port->status &= ~(ISI_TXOK | ISI_CTS);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800609 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800610 } else {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800611 if (header & ISI_CTS)
612 port->status |= ISI_CTS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 else
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800614 port->status &= ~ISI_CTS;
615 }
616
617 if (header & ISI_DSR)
618 port->status |= ISI_DSR;
619 else
620 port->status &= ~ISI_DSR;
621
622 if (header & ISI_RI)
623 port->status |= ISI_RI;
624 else
625 port->status &= ~ISI_RI;
626
627 break;
628
Jiri Slabya547dfe2006-01-09 20:54:26 -0800629 case 1: /* Received Break !!! */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800630 tty_insert_flip_char(tty, 0, TTY_BREAK);
631 if (port->flags & ASYNC_SAK)
632 do_SAK(tty);
633 tty_flip_buffer_push(tty);
634 break;
635
636 case 2: /* Statistics */
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800637 pr_dbg("isicom_interrupt: stats!!!.\n");
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800638 break;
639
640 default:
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800641 pr_dbg("Intr: Unknown code in status packet.\n");
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800642 break;
643 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800644 } else { /* Data Packet */
Alan Cox33f0f882006-01-09 20:54:13 -0800645
646 count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800647 pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 word_count = count >> 1;
Alan Cox33f0f882006-01-09 20:54:13 -0800649 insw(base, rp, word_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 byte_count -= (word_count << 1);
651 if (count & 0x0001) {
Jiri Slabya547dfe2006-01-09 20:54:26 -0800652 tty_insert_flip_char(tty, inw(base) & 0xff,
653 TTY_NORMAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 byte_count -= 2;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800655 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 if (byte_count > 0) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800657 pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping "
658 "bytes...\n", base, channel + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 while(byte_count > 0) { /* drain out unread xtra data */
660 inw(base);
661 byte_count -= 2;
662 }
663 }
Alan Cox33f0f882006-01-09 20:54:13 -0800664 tty_flip_buffer_push(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 }
Jiri Slaby18234f82006-12-08 02:38:51 -0800666 outw(0x0000, base+0x04); /* enable interrupts */
Jiri Slaby174f1302007-02-10 01:44:52 -0800667 spin_unlock(&card->card_lock);
Jiri Slabya547dfe2006-01-09 20:54:26 -0800668
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 return IRQ_HANDLED;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800670}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800672static void isicom_config_port(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800674 struct isi_board *card = port->card;
675 struct tty_struct *tty;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 unsigned long baud;
Jiri Slaby8070e352006-01-09 20:54:22 -0800677 unsigned long base = card->base;
678 u16 channel_setup, channel = port->channel,
679 shift_count = card->shift_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 unsigned char flow_ctrl;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800681
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 if (!(tty = port->tty) || !tty->termios)
683 return;
684 baud = C_BAUD(tty);
685 if (baud & CBAUDEX) {
686 baud &= ~CBAUDEX;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800687
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 /* if CBAUDEX bit is on and the baud is set to either 50 or 75
689 * then the card is programmed for 57.6Kbps or 115Kbps
690 * respectively.
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800691 */
692
Jiri Slaby7edc1362007-02-10 01:44:54 -0800693 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
694 if (baud < 1 || baud > 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 port->tty->termios->c_cflag &= ~CBAUDEX;
696 else
697 baud += 15;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800698 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 if (baud == 15) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800700
701 /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 * by the set_serial_info ioctl ... this is done by
703 * the 'setserial' utility.
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800704 */
705
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800707 baud++; /* 57.6 Kbps */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800709 baud +=2; /* 115 Kbps */
Jiri Slaby7edc1362007-02-10 01:44:54 -0800710 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
711 baud += 3; /* 230 kbps*/
712 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
713 baud += 4; /* 460 kbps*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 }
715 if (linuxb_to_isib[baud] == -1) {
716 /* hang up */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800717 drop_dtr(port);
718 return;
719 }
720 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 raise_dtr(port);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800722
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800723 if (WaitTillCardIsFree(base) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 outw(0x8000 | (channel << shift_count) |0x03, base);
725 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
726 channel_setup = 0;
727 switch(C_CSIZE(tty)) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800728 case CS5:
729 channel_setup |= ISICOM_CS5;
730 break;
731 case CS6:
732 channel_setup |= ISICOM_CS6;
733 break;
734 case CS7:
735 channel_setup |= ISICOM_CS7;
736 break;
737 case CS8:
738 channel_setup |= ISICOM_CS8;
739 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800741
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 if (C_CSTOPB(tty))
743 channel_setup |= ISICOM_2SB;
744 if (C_PARENB(tty)) {
745 channel_setup |= ISICOM_EVPAR;
746 if (C_PARODD(tty))
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800747 channel_setup |= ISICOM_ODPAR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800749 outw(channel_setup, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 InterruptTheCard(base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800751 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 if (C_CLOCAL(tty))
753 port->flags &= ~ASYNC_CHECK_CD;
754 else
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800755 port->flags |= ASYNC_CHECK_CD;
756
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 /* flow control settings ...*/
758 flow_ctrl = 0;
759 port->flags &= ~ASYNC_CTS_FLOW;
760 if (C_CRTSCTS(tty)) {
761 port->flags |= ASYNC_CTS_FLOW;
762 flow_ctrl |= ISICOM_CTSRTS;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800763 }
764 if (I_IXON(tty))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
766 if (I_IXOFF(tty))
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800767 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
768
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800769 if (WaitTillCardIsFree(base) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 outw(0x8000 | (channel << shift_count) |0x04, base);
771 outw(flow_ctrl << 8 | 0x05, base);
772 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
773 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800775
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 /* rx enabled -> enable port for rx on the card */
777 if (C_CREAD(tty)) {
778 card->port_status |= (1 << channel);
779 outw(card->port_status, base + 0x02);
780 }
781}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800783/* open et all */
784
785static inline void isicom_setup_board(struct isi_board *bp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786{
787 int channel;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800788 struct isi_port *port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800790
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791 spin_lock_irqsave(&bp->card_lock, flags);
792 if (bp->status & BOARD_ACTIVE) {
793 spin_unlock_irqrestore(&bp->card_lock, flags);
794 return;
795 }
796 port = bp->ports;
797 bp->status |= BOARD_ACTIVE;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800798 for (channel = 0; channel < bp->port_count; channel++, port++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 drop_dtr_rts(port);
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800800 spin_unlock_irqrestore(&bp->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800802
803static int isicom_setup_port(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800805 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800807
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 if (port->flags & ASYNC_INITIALIZED) {
809 return 0;
810 }
811 if (!port->xmit_buf) {
812 unsigned long page;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800813
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 if (!(page = get_zeroed_page(GFP_KERNEL)))
815 return -ENOMEM;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800816
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 if (port->xmit_buf) {
818 free_page(page);
819 return -ERESTARTSYS;
820 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800821 port->xmit_buf = (unsigned char *) page;
822 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823
824 spin_lock_irqsave(&card->card_lock, flags);
825 if (port->tty)
826 clear_bit(TTY_IO_ERROR, &port->tty->flags);
827 if (port->count == 1)
828 card->count++;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800829
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800831
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 /* discard any residual data */
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800833 if (WaitTillCardIsFree(card->base) == 0) {
834 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
835 card->base);
836 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
837 InterruptTheCard(card->base);
838 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800839
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 isicom_config_port(port);
841 port->flags |= ASYNC_INITIALIZED;
842 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800843
844 return 0;
845}
846
Jiri Slabya547dfe2006-01-09 20:54:26 -0800847static int block_til_ready(struct tty_struct *tty, struct file *filp,
848 struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800850 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 int do_clocal = 0, retval;
852 unsigned long flags;
853 DECLARE_WAITQUEUE(wait, current);
854
855 /* block if port is in the process of being closed */
856
857 if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800858 pr_dbg("block_til_ready: close in progress.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 interruptible_sleep_on(&port->close_wait);
860 if (port->flags & ASYNC_HUP_NOTIFY)
861 return -EAGAIN;
862 else
863 return -ERESTARTSYS;
864 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800865
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 /* if non-blocking mode is set ... */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800867
Jiri Slabya547dfe2006-01-09 20:54:26 -0800868 if ((filp->f_flags & O_NONBLOCK) ||
869 (tty->flags & (1 << TTY_IO_ERROR))) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800870 pr_dbg("block_til_ready: non-block mode.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 port->flags |= ASYNC_NORMAL_ACTIVE;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800872 return 0;
873 }
874
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 if (C_CLOCAL(tty))
876 do_clocal = 1;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800877
878 /* block waiting for DCD to be asserted, and while
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 callout dev is busy */
880 retval = 0;
881 add_wait_queue(&port->open_wait, &wait);
882
883 spin_lock_irqsave(&card->card_lock, flags);
884 if (!tty_hung_up_p(filp))
885 port->count--;
886 port->blocked_open++;
887 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800888
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889 while (1) {
890 raise_dtr_rts(port);
891
892 set_current_state(TASK_INTERRUPTIBLE);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800893 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 if (port->flags & ASYNC_HUP_NOTIFY)
895 retval = -EAGAIN;
896 else
897 retval = -ERESTARTSYS;
898 break;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800899 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 if (!(port->flags & ASYNC_CLOSING) &&
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800901 (do_clocal || (port->status & ISI_DCD))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 break;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800903 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 if (signal_pending(current)) {
905 retval = -ERESTARTSYS;
906 break;
907 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800908 schedule();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909 }
910 set_current_state(TASK_RUNNING);
911 remove_wait_queue(&port->open_wait, &wait);
912 spin_lock_irqsave(&card->card_lock, flags);
913 if (!tty_hung_up_p(filp))
914 port->count++;
915 port->blocked_open--;
916 spin_unlock_irqrestore(&card->card_lock, flags);
917 if (retval)
918 return retval;
919 port->flags |= ASYNC_NORMAL_ACTIVE;
920 return 0;
921}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800922
923static int isicom_open(struct tty_struct *tty, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800925 struct isi_port *port;
926 struct isi_board *card;
Jiri Slaby17c4edf2006-12-08 02:38:57 -0800927 unsigned int board;
928 int error, line;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929
930 line = tty->index;
931 if (line < 0 || line > PORT_COUNT-1)
932 return -ENODEV;
933 board = BOARD(line);
934 card = &isi_card[board];
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800935
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 if (!(card->status & FIRMWARE_LOADED))
937 return -ENODEV;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800938
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 /* open on a port greater than the port count for the card !!! */
940 if (line > ((board * 16) + card->port_count - 1))
941 return -ENODEV;
942
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800943 port = &isi_ports[line];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
945 return -ENODEV;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800946
947 isicom_setup_board(card);
948
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 port->count++;
950 tty->driver_data = port;
951 port->tty = tty;
952 if ((error = isicom_setup_port(port))!=0)
953 return error;
954 if ((error = block_til_ready(tty, filp, port))!=0)
955 return error;
956
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800957 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800959
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960/* close et all */
961
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800962static inline void isicom_shutdown_board(struct isi_board *bp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964 if (bp->status & BOARD_ACTIVE) {
965 bp->status &= ~BOARD_ACTIVE;
966 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967}
968
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800969/* card->lock HAS to be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800970static void isicom_shutdown_port(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800972 struct isi_board *card = port->card;
973 struct tty_struct *tty;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800974
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 tty = port->tty;
976
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800977 if (!(port->flags & ASYNC_INITIALIZED))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978 return;
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800979
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 if (port->xmit_buf) {
981 free_page((unsigned long) port->xmit_buf);
982 port->xmit_buf = NULL;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800983 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 port->flags &= ~ASYNC_INITIALIZED;
985 /* 3rd October 2000 : Vinayak P Risbud */
986 port->tty = NULL;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800987
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988 /*Fix done by Anil .S on 30-04-2001
989 remote login through isi port has dtr toggle problem
990 due to which the carrier drops before the password prompt
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800991 appears on the remote end. Now we drop the dtr only if the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 HUPCL(Hangup on close) flag is set for the tty*/
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800993
994 if (C_HUPCL(tty))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 /* drop dtr on this port */
996 drop_dtr(port);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800997
998 /* any other port uninits */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 if (tty)
1000 set_bit(TTY_IO_ERROR, &tty->flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001001
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002 if (--card->count < 0) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001003 pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 card->base, card->count);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001005 card->count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001007
Jiri Slabya547dfe2006-01-09 20:54:26 -08001008 /* last port was closed, shutdown that boad too */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001009 if (C_HUPCL(tty)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 if (!card->count)
1011 isicom_shutdown_board(card);
1012 }
1013}
1014
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001015static void isicom_close(struct tty_struct *tty, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016{
Jiri Slaby8070e352006-01-09 20:54:22 -08001017 struct isi_port *port = tty->driver_data;
Jiri Slabyc387fd82006-11-15 00:30:17 +01001018 struct isi_board *card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001020
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 if (!port)
1022 return;
Jiri Slabyc387fd82006-11-15 00:30:17 +01001023 card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 if (isicom_paranoia_check(port, tty->name, "isicom_close"))
1025 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001026
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001027 pr_dbg("Close start!!!.\n");
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001028
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029 spin_lock_irqsave(&card->card_lock, flags);
1030 if (tty_hung_up_p(filp)) {
1031 spin_unlock_irqrestore(&card->card_lock, flags);
1032 return;
1033 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001034
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 if (tty->count == 1 && port->count != 1) {
Jiri Slabya547dfe2006-01-09 20:54:26 -08001036 printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
1037 "count tty->count = 1 port count = %d.\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 card->base, port->count);
1039 port->count = 1;
1040 }
1041 if (--port->count < 0) {
Jiri Slabya547dfe2006-01-09 20:54:26 -08001042 printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
1043 "count for channel%d = %d", card->base, port->channel,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044 port->count);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001045 port->count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001047
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 if (port->count) {
1049 spin_unlock_irqrestore(&card->card_lock, flags);
1050 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001051 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 port->flags |= ASYNC_CLOSING;
1053 tty->closing = 1;
1054 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001055
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056 if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1057 tty_wait_until_sent(tty, port->closing_wait);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001058 /* indicate to the card that no more data can be received
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 on this port */
1060 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001061 if (port->flags & ASYNC_INITIALIZED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062 card->port_status &= ~(1 << port->channel);
1063 outw(card->port_status, card->base + 0x02);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001064 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065 isicom_shutdown_port(port);
1066 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001067
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 if (tty->driver->flush_buffer)
1069 tty->driver->flush_buffer(tty);
1070 tty_ldisc_flush(tty);
1071
1072 spin_lock_irqsave(&card->card_lock, flags);
1073 tty->closing = 0;
1074
1075 if (port->blocked_open) {
1076 spin_unlock_irqrestore(&card->card_lock, flags);
1077 if (port->close_delay) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001078 pr_dbg("scheduling until time out.\n");
Jiri Slabya547dfe2006-01-09 20:54:26 -08001079 msleep_interruptible(
1080 jiffies_to_msecs(port->close_delay));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 }
1082 spin_lock_irqsave(&card->card_lock, flags);
1083 wake_up_interruptible(&port->open_wait);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001084 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1086 wake_up_interruptible(&port->close_wait);
1087 spin_unlock_irqrestore(&card->card_lock, flags);
1088}
1089
1090/* write et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001091static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
1092 int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093{
Jiri Slaby8070e352006-01-09 20:54:22 -08001094 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001095 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 unsigned long flags;
1097 int cnt, total = 0;
1098
1099 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
1100 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001101
Eric Sesterhenn326f28e92006-06-25 05:48:48 -07001102 if (!port->xmit_buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001104
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001106
1107 while(1) {
Jiri Slabya547dfe2006-01-09 20:54:26 -08001108 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
1109 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001110 if (cnt <= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 break;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001112
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 memcpy(port->xmit_buf + port->xmit_head, buf, cnt);
Jiri Slabya547dfe2006-01-09 20:54:26 -08001114 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
1115 - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 port->xmit_cnt += cnt;
1117 buf += cnt;
1118 count -= cnt;
1119 total += cnt;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001120 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
1122 port->status |= ISI_TXOK;
1123 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001124 return total;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125}
1126
1127/* put_char et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001128static void isicom_put_char(struct tty_struct *tty, unsigned char ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129{
Jiri Slaby8070e352006-01-09 20:54:22 -08001130 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001131 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001133
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
1135 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001136
Eric Sesterhenn326f28e92006-06-25 05:48:48 -07001137 if (!port->xmit_buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138 return;
1139
1140 spin_lock_irqsave(&card->card_lock, flags);
1141 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
1142 spin_unlock_irqrestore(&card->card_lock, flags);
1143 return;
1144 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001145
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 port->xmit_buf[port->xmit_head++] = ch;
1147 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
1148 port->xmit_cnt++;
1149 spin_unlock_irqrestore(&card->card_lock, flags);
1150}
1151
1152/* flush_chars et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001153static void isicom_flush_chars(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154{
Jiri Slaby8070e352006-01-09 20:54:22 -08001155 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001156
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1158 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001159
Jiri Slabya547dfe2006-01-09 20:54:26 -08001160 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1161 !port->xmit_buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001163
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164 /* this tells the transmitter to consider this port for
1165 data output to the card ... that's the best we can do. */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001166 port->status |= ISI_TXOK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167}
1168
1169/* write_room et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001170static int isicom_write_room(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171{
Jiri Slaby8070e352006-01-09 20:54:22 -08001172 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173 int free;
1174
1175 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1176 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001177
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1179 if (free < 0)
1180 free = 0;
1181 return free;
1182}
1183
1184/* chars_in_buffer et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001185static int isicom_chars_in_buffer(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186{
Jiri Slaby8070e352006-01-09 20:54:22 -08001187 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1189 return 0;
1190 return port->xmit_cnt;
1191}
1192
1193/* ioctl et all */
Jiri Slabya547dfe2006-01-09 20:54:26 -08001194static inline void isicom_send_break(struct isi_port *port,
1195 unsigned long length)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001197 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -08001198 unsigned long base = card->base;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001199
1200 if (!lock_card(card))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001202
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1204 outw((length & 0xff) << 8 | 0x00, base);
1205 outw((length & 0xff00), base);
1206 InterruptTheCard(base);
1207
1208 unlock_card(card);
1209}
1210
1211static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
1212{
Jiri Slaby8070e352006-01-09 20:54:22 -08001213 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 /* just send the port status */
Jiri Slaby8070e352006-01-09 20:54:22 -08001215 u16 status = port->status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216
1217 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1218 return -ENODEV;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001219
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1221 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1222 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1223 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1224 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1225 ((status & ISI_RI ) ? TIOCM_RI : 0);
1226}
1227
1228static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001229 unsigned int set, unsigned int clear)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230{
Jiri Slaby8070e352006-01-09 20:54:22 -08001231 struct isi_port *port = tty->driver_data;
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001232 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001233
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1235 return -ENODEV;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001236
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001237 spin_lock_irqsave(&port->card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238 if (set & TIOCM_RTS)
1239 raise_rts(port);
1240 if (set & TIOCM_DTR)
1241 raise_dtr(port);
1242
1243 if (clear & TIOCM_RTS)
1244 drop_rts(port);
1245 if (clear & TIOCM_DTR)
1246 drop_dtr(port);
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001247 spin_unlock_irqrestore(&port->card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248
1249 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001250}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001252static int isicom_set_serial_info(struct isi_port *port,
1253 struct serial_struct __user *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254{
1255 struct serial_struct newinfo;
1256 int reconfig_port;
1257
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001258 if (copy_from_user(&newinfo, info, sizeof(newinfo)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259 return -EFAULT;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001260
1261 reconfig_port = ((port->flags & ASYNC_SPD_MASK) !=
1262 (newinfo.flags & ASYNC_SPD_MASK));
1263
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 if (!capable(CAP_SYS_ADMIN)) {
1265 if ((newinfo.close_delay != port->close_delay) ||
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001266 (newinfo.closing_wait != port->closing_wait) ||
1267 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1268 (port->flags & ~ASYNC_USR_MASK)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269 return -EPERM;
1270 port->flags = ((port->flags & ~ ASYNC_USR_MASK) |
1271 (newinfo.flags & ASYNC_USR_MASK));
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001272 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273 else {
1274 port->close_delay = newinfo.close_delay;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001275 port->closing_wait = newinfo.closing_wait;
1276 port->flags = ((port->flags & ~ASYNC_FLAGS) |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277 (newinfo.flags & ASYNC_FLAGS));
1278 }
1279 if (reconfig_port) {
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001280 unsigned long flags;
1281 spin_lock_irqsave(&port->card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 isicom_config_port(port);
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001283 spin_unlock_irqrestore(&port->card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001285 return 0;
1286}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001288static int isicom_get_serial_info(struct isi_port *port,
1289 struct serial_struct __user *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290{
1291 struct serial_struct out_info;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001292
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293 memset(&out_info, 0, sizeof(out_info));
1294/* out_info.type = ? */
1295 out_info.line = port - isi_ports;
1296 out_info.port = port->card->base;
1297 out_info.irq = port->card->irq;
1298 out_info.flags = port->flags;
1299/* out_info.baud_base = ? */
1300 out_info.close_delay = port->close_delay;
1301 out_info.closing_wait = port->closing_wait;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001302 if (copy_to_user(info, &out_info, sizeof(out_info)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303 return -EFAULT;
1304 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001305}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001307static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
1308 unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309{
Jiri Slaby8070e352006-01-09 20:54:22 -08001310 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311 void __user *argp = (void __user *)arg;
1312 int retval;
1313
1314 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1315 return -ENODEV;
1316
1317 switch(cmd) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001318 case TCSBRK:
1319 retval = tty_check_change(tty);
1320 if (retval)
1321 return retval;
1322 tty_wait_until_sent(tty, 0);
1323 if (!arg)
1324 isicom_send_break(port, HZ/4);
1325 return 0;
1326
1327 case TCSBRKP:
1328 retval = tty_check_change(tty);
1329 if (retval)
1330 return retval;
1331 tty_wait_until_sent(tty, 0);
1332 isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4);
1333 return 0;
1334
1335 case TIOCGSOFTCAR:
Jiri Slabya547dfe2006-01-09 20:54:26 -08001336 return put_user(C_CLOCAL(tty) ? 1 : 0,
1337 (unsigned long __user *)argp);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001338
1339 case TIOCSSOFTCAR:
1340 if (get_user(arg, (unsigned long __user *) argp))
1341 return -EFAULT;
1342 tty->termios->c_cflag =
1343 ((tty->termios->c_cflag & ~CLOCAL) |
1344 (arg ? CLOCAL : 0));
1345 return 0;
1346
1347 case TIOCGSERIAL:
1348 return isicom_get_serial_info(port, argp);
1349
1350 case TIOCSSERIAL:
1351 return isicom_set_serial_info(port, argp);
1352
1353 default:
1354 return -ENOIOCTLCMD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355 }
1356 return 0;
1357}
1358
1359/* set_termios et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001360static void isicom_set_termios(struct tty_struct *tty,
Alan Cox606d0992006-12-08 02:38:45 -08001361 struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362{
Jiri Slaby8070e352006-01-09 20:54:22 -08001363 struct isi_port *port = tty->driver_data;
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001364 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001365
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1367 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001368
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369 if (tty->termios->c_cflag == old_termios->c_cflag &&
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001370 tty->termios->c_iflag == old_termios->c_iflag)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001372
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001373 spin_lock_irqsave(&port->card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374 isicom_config_port(port);
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001375 spin_unlock_irqrestore(&port->card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001376
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377 if ((old_termios->c_cflag & CRTSCTS) &&
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001378 !(tty->termios->c_cflag & CRTSCTS)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379 tty->hw_stopped = 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001380 isicom_start(tty);
1381 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382}
1383
1384/* throttle et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001385static void isicom_throttle(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386{
Jiri Slaby8070e352006-01-09 20:54:22 -08001387 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001388 struct isi_board *card = port->card;
1389
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1391 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001392
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393 /* tell the card that this port cannot handle any more data for now */
1394 card->port_status &= ~(1 << port->channel);
1395 outw(card->port_status, card->base + 0x02);
1396}
1397
1398/* unthrottle et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001399static void isicom_unthrottle(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400{
Jiri Slaby8070e352006-01-09 20:54:22 -08001401 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001402 struct isi_board *card = port->card;
1403
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1405 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001406
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407 /* tell the card that this port is ready to accept more data */
1408 card->port_status |= (1 << port->channel);
1409 outw(card->port_status, card->base + 0x02);
1410}
1411
1412/* stop et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001413static void isicom_stop(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414{
Jiri Slaby8070e352006-01-09 20:54:22 -08001415 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416
1417 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1418 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001419
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420 /* this tells the transmitter not to consider this port for
1421 data output to the card. */
1422 port->status &= ~ISI_TXOK;
1423}
1424
1425/* start et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001426static void isicom_start(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427{
Jiri Slaby8070e352006-01-09 20:54:22 -08001428 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001429
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1431 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001432
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433 /* this tells the transmitter to consider this port for
1434 data output to the card. */
1435 port->status |= ISI_TXOK;
1436}
1437
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001438static void isicom_hangup(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439{
Jiri Slaby8070e352006-01-09 20:54:22 -08001440 struct isi_port *port = tty->driver_data;
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001441 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001442
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1444 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001445
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001446 spin_lock_irqsave(&port->card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447 isicom_shutdown_port(port);
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001448 spin_unlock_irqrestore(&port->card->card_lock, flags);
1449
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450 port->count = 0;
1451 port->flags &= ~ASYNC_NORMAL_ACTIVE;
1452 port->tty = NULL;
1453 wake_up_interruptible(&port->open_wait);
1454}
1455
1456/* flush_buffer et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001457static void isicom_flush_buffer(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458{
Jiri Slaby8070e352006-01-09 20:54:22 -08001459 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001460 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001462
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
1464 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001465
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466 spin_lock_irqsave(&card->card_lock, flags);
1467 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1468 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001469
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470 tty_wakeup(tty);
1471}
1472
Jiri Slaby9ac09482006-01-09 20:54:24 -08001473/*
1474 * Driver init and deinit functions
1475 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476
Jeff Dikeb68e31d2006-10-02 02:17:18 -07001477static const struct tty_operations isicom_ops = {
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001478 .open = isicom_open,
1479 .close = isicom_close,
1480 .write = isicom_write,
1481 .put_char = isicom_put_char,
1482 .flush_chars = isicom_flush_chars,
1483 .write_room = isicom_write_room,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484 .chars_in_buffer = isicom_chars_in_buffer,
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001485 .ioctl = isicom_ioctl,
1486 .set_termios = isicom_set_termios,
1487 .throttle = isicom_throttle,
1488 .unthrottle = isicom_unthrottle,
1489 .stop = isicom_stop,
1490 .start = isicom_start,
1491 .hangup = isicom_hangup,
1492 .flush_buffer = isicom_flush_buffer,
1493 .tiocmget = isicom_tiocmget,
1494 .tiocmset = isicom_tiocmset,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495};
1496
Jiri Slaby9ac09482006-01-09 20:54:24 -08001497static int __devinit reset_card(struct pci_dev *pdev,
1498 const unsigned int card, unsigned int *signature)
1499{
1500 struct isi_board *board = pci_get_drvdata(pdev);
1501 unsigned long base = board->base;
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001502 unsigned int sig, portcount = 0;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001503 int retval = 0;
1504
1505 dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1506 base);
1507
1508 inw(base + 0x8);
1509
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001510 msleep(10);
Jiri Slaby9ac09482006-01-09 20:54:24 -08001511
1512 outw(0, base + 0x8); /* Reset */
1513
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001514 msleep(1000);
Jiri Slaby9ac09482006-01-09 20:54:24 -08001515
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001516 sig = inw(base + 0x4) & 0xff;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001517
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001518 if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1519 sig != 0xee) {
1520 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1521 "bad I/O Port Address 0x%lx).\n", card + 1, base);
1522 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
Jiri Slaby18234f82006-12-08 02:38:51 -08001523 retval = -EIO;
1524 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001525 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001527 msleep(10);
1528
1529 portcount = inw(base + 0x2);
1530 if (!inw(base + 0xe) & 0x1 || (portcount != 0 && portcount != 4 &&
1531 portcount != 8 && portcount != 16)) {
1532 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.",
1533 card + 1);
1534 retval = -EIO;
1535 goto end;
1536 }
1537
1538 switch (sig) {
Jiri Slaby9ac09482006-01-09 20:54:24 -08001539 case 0xa5:
1540 case 0xbb:
1541 case 0xdd:
Jiri Slaby18234f82006-12-08 02:38:51 -08001542 board->port_count = (portcount == 4) ? 4 : 8;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001543 board->shift_count = 12;
1544 break;
1545 case 0xcc:
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001546 case 0xee:
Jiri Slaby9ac09482006-01-09 20:54:24 -08001547 board->port_count = 16;
1548 board->shift_count = 11;
1549 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550 }
Jiri Slaby9ac09482006-01-09 20:54:24 -08001551 dev_info(&pdev->dev, "-Done\n");
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001552 *signature = sig;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001553
1554end:
1555 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556}
1557
Jiri Slabye65c1db2006-01-09 20:54:25 -08001558static int __devinit load_firmware(struct pci_dev *pdev,
1559 const unsigned int index, const unsigned int signature)
1560{
1561 struct isi_board *board = pci_get_drvdata(pdev);
1562 const struct firmware *fw;
1563 unsigned long base = board->base;
1564 unsigned int a;
1565 u16 word_count, status;
1566 int retval = -EIO;
1567 char *name;
1568 u8 *data;
1569
1570 struct stframe {
1571 u16 addr;
1572 u16 count;
1573 u8 data[0];
1574 } *frame;
1575
1576 switch (signature) {
1577 case 0xa5:
1578 name = "isi608.bin";
1579 break;
1580 case 0xbb:
1581 name = "isi608em.bin";
1582 break;
1583 case 0xcc:
1584 name = "isi616em.bin";
1585 break;
1586 case 0xdd:
1587 name = "isi4608.bin";
1588 break;
1589 case 0xee:
1590 name = "isi4616.bin";
1591 break;
1592 default:
1593 dev_err(&pdev->dev, "Unknown signature.\n");
1594 goto end;
1595 }
1596
1597 retval = request_firmware(&fw, name, &pdev->dev);
1598 if (retval)
1599 goto end;
1600
Jiri Slabye4e04082006-09-30 23:27:50 -07001601 retval = -EIO;
1602
Jiri Slabye65c1db2006-01-09 20:54:25 -08001603 for (frame = (struct stframe *)fw->data;
1604 frame < (struct stframe *)(fw->data + fw->size);
Jiri Slabye4e04082006-09-30 23:27:50 -07001605 frame = (struct stframe *)((u8 *)(frame + 1) +
1606 frame->count)) {
Jiri Slabye65c1db2006-01-09 20:54:25 -08001607 if (WaitTillCardIsFree(base))
1608 goto errrelfw;
1609
1610 outw(0xf0, base); /* start upload sequence */
1611 outw(0x00, base);
1612 outw(frame->addr, base); /* lsb of address */
1613
1614 word_count = frame->count / 2 + frame->count % 2;
1615 outw(word_count, base);
1616 InterruptTheCard(base);
1617
1618 udelay(100); /* 0x2f */
1619
1620 if (WaitTillCardIsFree(base))
1621 goto errrelfw;
1622
1623 if ((status = inw(base + 0x4)) != 0) {
1624 dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1625 "Address:0x%x\nCount:0x%x\nStatus:0x%x\n",
1626 index + 1, frame->addr, frame->count, status);
1627 goto errrelfw;
1628 }
1629 outsw(base, frame->data, word_count);
1630
1631 InterruptTheCard(base);
1632
1633 udelay(50); /* 0x0f */
1634
1635 if (WaitTillCardIsFree(base))
1636 goto errrelfw;
1637
1638 if ((status = inw(base + 0x4)) != 0) {
1639 dev_err(&pdev->dev, "Card%d got out of sync.Card "
1640 "Status:0x%x\n", index + 1, status);
1641 goto errrelfw;
1642 }
1643 }
1644
Jiri Slabye65c1db2006-01-09 20:54:25 -08001645/* XXX: should we test it by reading it back and comparing with original like
1646 * in load firmware package? */
Jiri Slabye4e04082006-09-30 23:27:50 -07001647 for (frame = (struct stframe *)fw->data;
1648 frame < (struct stframe *)(fw->data + fw->size);
1649 frame = (struct stframe *)((u8 *)(frame + 1) +
1650 frame->count)) {
Jiri Slabye65c1db2006-01-09 20:54:25 -08001651 if (WaitTillCardIsFree(base))
1652 goto errrelfw;
1653
1654 outw(0xf1, base); /* start download sequence */
1655 outw(0x00, base);
1656 outw(frame->addr, base); /* lsb of address */
1657
1658 word_count = (frame->count >> 1) + frame->count % 2;
1659 outw(word_count + 1, base);
1660 InterruptTheCard(base);
1661
1662 udelay(50); /* 0xf */
1663
1664 if (WaitTillCardIsFree(base))
1665 goto errrelfw;
1666
1667 if ((status = inw(base + 0x4)) != 0) {
1668 dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1669 "Address:0x%x\nCount:0x%x\nStatus: 0x%x\n",
1670 index + 1, frame->addr, frame->count, status);
1671 goto errrelfw;
1672 }
1673
1674 data = kmalloc(word_count * 2, GFP_KERNEL);
Jiri Slabyf0671372006-12-08 02:38:54 -08001675 if (data == NULL) {
1676 dev_err(&pdev->dev, "Card%d, firmware upload "
1677 "failed, not enough memory\n", index + 1);
1678 goto errrelfw;
1679 }
Jiri Slabye65c1db2006-01-09 20:54:25 -08001680 inw(base);
1681 insw(base, data, word_count);
1682 InterruptTheCard(base);
1683
1684 for (a = 0; a < frame->count; a++)
1685 if (data[a] != frame->data[a]) {
1686 kfree(data);
1687 dev_err(&pdev->dev, "Card%d, firmware upload "
1688 "failed\n", index + 1);
1689 goto errrelfw;
1690 }
1691 kfree(data);
1692
1693 udelay(50); /* 0xf */
1694
1695 if (WaitTillCardIsFree(base))
1696 goto errrelfw;
1697
1698 if ((status = inw(base + 0x4)) != 0) {
1699 dev_err(&pdev->dev, "Card%d verify got out of sync. "
1700 "Card Status:0x%x\n", index + 1, status);
1701 goto errrelfw;
1702 }
1703 }
1704
Jiri Slabye4e04082006-09-30 23:27:50 -07001705 /* xfer ctrl */
1706 if (WaitTillCardIsFree(base))
1707 goto errrelfw;
1708
1709 outw(0xf2, base);
1710 outw(0x800, base);
1711 outw(0x0, base);
1712 outw(0x0, base);
1713 InterruptTheCard(base);
1714 outw(0x0, base + 0x4); /* for ISI4608 cards */
1715
Jiri Slabye65c1db2006-01-09 20:54:25 -08001716 board->status |= FIRMWARE_LOADED;
1717 retval = 0;
1718
1719errrelfw:
1720 release_firmware(fw);
1721end:
1722 return retval;
1723}
1724
Jiri Slaby9ac09482006-01-09 20:54:24 -08001725/*
1726 * Insmod can set static symbols so keep these static
1727 */
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001728static unsigned int card_count;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001729
1730static int __devinit isicom_probe(struct pci_dev *pdev,
1731 const struct pci_device_id *ent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001732{
Jiri Slaby4969b3a2007-07-17 04:05:18 -07001733 unsigned int signature, index;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001734 int retval = -EPERM;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001735 struct isi_board *board = NULL;
1736
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001737 if (card_count >= BOARD_COUNT)
Jiri Slaby9ac09482006-01-09 20:54:24 -08001738 goto err;
1739
Jiri Slaby9ac09482006-01-09 20:54:24 -08001740 dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1741
1742 /* allot the first empty slot in the array */
1743 for (index = 0; index < BOARD_COUNT; index++)
1744 if (isi_card[index].base == 0) {
1745 board = &isi_card[index];
1746 break;
1747 }
1748
Jiri Slaby938a7022006-12-08 02:38:52 -08001749 board->index = index;
Jiri Slaby4969b3a2007-07-17 04:05:18 -07001750 board->base = pci_resource_start(pdev, 3);
1751 board->irq = pdev->irq;
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001752 card_count++;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001753
1754 pci_set_drvdata(pdev, board);
1755
Jiri Slaby78028da2006-12-08 02:38:53 -08001756 retval = pci_request_region(pdev, 3, ISICOM_NAME);
1757 if (retval) {
Jiri Slaby09a4a112006-12-08 02:38:49 -08001758 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1759 "will be disabled.\n", board->base, board->base + 15,
1760 index + 1);
1761 retval = -EBUSY;
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001762 goto errdec;
Jiri Slaby09a4a112006-12-08 02:38:49 -08001763 }
Jiri Slaby9ac09482006-01-09 20:54:24 -08001764
Jiri Slaby09a4a112006-12-08 02:38:49 -08001765 retval = request_irq(board->irq, isicom_interrupt,
1766 IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board);
1767 if (retval < 0) {
1768 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1769 "Card%d will be disabled.\n", board->irq, index + 1);
Jiri Slaby9ac09482006-01-09 20:54:24 -08001770 goto errunrr;
Jiri Slaby09a4a112006-12-08 02:38:49 -08001771 }
Jiri Slaby9ac09482006-01-09 20:54:24 -08001772
1773 retval = reset_card(pdev, index, &signature);
1774 if (retval < 0)
1775 goto errunri;
1776
Jiri Slabye65c1db2006-01-09 20:54:25 -08001777 retval = load_firmware(pdev, index, signature);
1778 if (retval < 0)
1779 goto errunri;
1780
Jiri Slaby938a7022006-12-08 02:38:52 -08001781 for (index = 0; index < board->port_count; index++)
1782 tty_register_device(isicom_normal, board->index * 16 + index,
1783 &pdev->dev);
1784
Jiri Slaby9ac09482006-01-09 20:54:24 -08001785 return 0;
1786
1787errunri:
1788 free_irq(board->irq, board);
1789errunrr:
Jiri Slaby78028da2006-12-08 02:38:53 -08001790 pci_release_region(pdev, 3);
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001791errdec:
Jiri Slaby9ac09482006-01-09 20:54:24 -08001792 board->base = 0;
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001793 card_count--;
1794err:
Jiri Slaby9ac09482006-01-09 20:54:24 -08001795 return retval;
1796}
1797
1798static void __devexit isicom_remove(struct pci_dev *pdev)
1799{
1800 struct isi_board *board = pci_get_drvdata(pdev);
Jiri Slaby938a7022006-12-08 02:38:52 -08001801 unsigned int i;
1802
1803 for (i = 0; i < board->port_count; i++)
1804 tty_unregister_device(isicom_normal, board->index * 16 + i);
Jiri Slaby9ac09482006-01-09 20:54:24 -08001805
1806 free_irq(board->irq, board);
Jiri Slaby78028da2006-12-08 02:38:53 -08001807 pci_release_region(pdev, 3);
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001808 board->base = 0;
1809 card_count--;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001810}
1811
Jiri Slabyca262002006-12-08 02:38:50 -08001812static int __init isicom_init(void)
Jiri Slaby9ac09482006-01-09 20:54:24 -08001813{
1814 int retval, idx, channel;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001815 struct isi_port *port;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001816
Jiri Slaby9ac09482006-01-09 20:54:24 -08001817 for(idx = 0; idx < BOARD_COUNT; idx++) {
1818 port = &isi_ports[idx * 16];
1819 isi_card[idx].ports = port;
1820 spin_lock_init(&isi_card[idx].card_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001821 for (channel = 0; channel < 16; channel++, port++) {
1822 port->magic = ISICOM_MAGIC;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001823 port->card = &isi_card[idx];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001824 port->channel = channel;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001825 port->close_delay = 50 * HZ/100;
1826 port->closing_wait = 3000 * HZ/100;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001827 port->status = 0;
1828 init_waitqueue_head(&port->open_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001829 init_waitqueue_head(&port->close_wait);
1830 /* . . . */
Jiri Slaby9ac09482006-01-09 20:54:24 -08001831 }
1832 isi_card[idx].base = 0;
1833 isi_card[idx].irq = 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001834 }
1835
Jiri Slaby09a4a112006-12-08 02:38:49 -08001836 /* tty driver structure initialization */
1837 isicom_normal = alloc_tty_driver(PORT_COUNT);
1838 if (!isicom_normal) {
1839 retval = -ENOMEM;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001840 goto error;
Jiri Slaby09a4a112006-12-08 02:38:49 -08001841 }
1842
1843 isicom_normal->owner = THIS_MODULE;
1844 isicom_normal->name = "ttyM";
1845 isicom_normal->major = ISICOM_NMAJOR;
1846 isicom_normal->minor_start = 0;
1847 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1848 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1849 isicom_normal->init_termios = tty_std_termios;
1850 isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
1851 CLOCAL;
Jiri Slaby938a7022006-12-08 02:38:52 -08001852 isicom_normal->flags = TTY_DRIVER_REAL_RAW |
1853 TTY_DRIVER_DYNAMIC_DEV;
Jiri Slaby09a4a112006-12-08 02:38:49 -08001854 tty_set_operations(isicom_normal, &isicom_ops);
1855
1856 retval = tty_register_driver(isicom_normal);
1857 if (retval) {
1858 pr_dbg("Couldn't register the dialin driver\n");
1859 goto err_puttty;
1860 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001861
Jiri Slaby9ac09482006-01-09 20:54:24 -08001862 retval = pci_register_driver(&isicom_driver);
1863 if (retval < 0) {
1864 printk(KERN_ERR "ISICOM: Unable to register pci driver.\n");
Jiri Slaby09a4a112006-12-08 02:38:49 -08001865 goto err_unrtty;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001866 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001867
Jiri Slaby34b55b82006-12-08 02:38:55 -08001868 mod_timer(&tx, jiffies + 1);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001869
Linus Torvalds1da177e2005-04-16 15:20:36 -07001870 return 0;
Jiri Slaby09a4a112006-12-08 02:38:49 -08001871err_unrtty:
1872 tty_unregister_driver(isicom_normal);
1873err_puttty:
1874 put_tty_driver(isicom_normal);
Jiri Slaby9ac09482006-01-09 20:54:24 -08001875error:
1876 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001877}
1878
1879static void __exit isicom_exit(void)
1880{
Jiri Slabye3273252007-07-17 04:05:18 -07001881 del_timer_sync(&tx);
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001882
Jiri Slaby9ac09482006-01-09 20:54:24 -08001883 pci_unregister_driver(&isicom_driver);
Jiri Slaby09a4a112006-12-08 02:38:49 -08001884 tty_unregister_driver(isicom_normal);
1885 put_tty_driver(isicom_normal);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001886}
1887
Jiri Slabyca262002006-12-08 02:38:50 -08001888module_init(isicom_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889module_exit(isicom_exit);
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001890
1891MODULE_AUTHOR("MultiTech");
1892MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1893MODULE_LICENSE("GPL");