blob: 426bfdd7f3e0221d07498f7b30c9aab7d6904a48 [file] [log] [blame]
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
Alan Cox8eb04cf2008-11-11 14:48:44 +000010 * 1/9/98 alan@lxorguk.ukuu.org.uk
11 * Merge to 2.0.x kernel tree
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 * Obtain and use official major/minors
13 * Loader switched to a misc device
14 * (fixed range check bug as a side effect)
15 * Printk clean up
Alan Cox8eb04cf2008-11-11 14:48:44 +000016 * 9/12/98 alan@lxorguk.ukuu.org.uk
17 * Rough port to 2.1.x
Linus Torvalds1da177e2005-04-16 15:20:36 -070018 *
19 * 10/6/99 sameer Merged the ISA and PCI drivers to
20 * a new unified driver.
21 *
22 * 3/9/99 sameer Added support for ISI4616 cards.
23 *
24 * 16/9/99 sameer We do not force RTS low anymore.
Jiri Slabyd8d16e42006-01-09 20:54:21 -080025 * This is to prevent the firmware
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 * from getting confused.
27 *
28 * 26/10/99 sameer Cosmetic changes:The driver now
29 * dumps the Port Count information
30 * along with I/O address and IRQ.
31 *
32 * 13/12/99 sameer Fixed the problem with IRQ sharing.
33 *
34 * 10/5/00 sameer Fixed isicom_shutdown_board()
35 * to not lower DTR on all the ports
Jiri Slabyd8d16e42006-01-09 20:54:21 -080036 * when the last port on the card is
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 * closed.
38 *
39 * 10/5/00 sameer Signal mask setup command added
Jiri Slabyd8d16e42006-01-09 20:54:21 -080040 * to isicom_setup_port and
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 * isicom_shutdown_port.
42 *
43 * 24/5/00 sameer The driver is now SMP aware.
Jiri Slabyd8d16e42006-01-09 20:54:21 -080044 *
45 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem
Jiri Slabyd8d16e42006-01-09 20:54:21 -080047 *
48 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 * 03/01/01 anil .s Added support for resetting the
50 * internal modems on ISI cards.
51 *
52 * 08/02/01 anil .s Upgraded the driver for kernel
53 * 2.4.x
54 *
Jiri Slabyd8d16e42006-01-09 20:54:21 -080055 * 11/04/01 Kevin Fixed firmware load problem with
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 * ISIHP-4X card
Jiri Slabyd8d16e42006-01-09 20:54:21 -080057 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 * 30/04/01 anil .s Fixed the remote login through
59 * ISI port problem. Now the link
60 * does not go down before password
61 * prompt.
62 *
63 * 03/05/01 anil .s Fixed the problem with IRQ sharing
64 * among ISI-PCI cards.
65 *
66 * 03/05/01 anil .s Added support to display the version
Jiri Slabyd8d16e42006-01-09 20:54:21 -080067 * info during insmod as well as module
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 * listing by lsmod.
Jiri Slabyd8d16e42006-01-09 20:54:21 -080069 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 * 10/05/01 anil .s Done the modifications to the source
71 * file and Install script so that the
72 * same installation can be used for
73 * 2.2.x and 2.4.x kernel.
74 *
75 * 06/06/01 anil .s Now we drop both dtr and rts during
76 * shutdown_port as well as raise them
77 * during isicom_config_port.
Jiri Slabyd8d16e42006-01-09 20:54:21 -080078 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 * 09/06/01 acme@conectiva.com.br use capable, not suser, do
80 * restore_flags on failure in
81 * isicom_send_break, verify put_user
82 * result
83 *
Jiri Slabyd8d16e42006-01-09 20:54:21 -080084 * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps
85 * Baud index extended to 21
86 *
87 * 20/03/03 ranjeeth Made to work for Linux Advanced server.
88 * Taken care of license warning.
89 *
90 * 10/12/03 Ravindra Made to work for Fedora Core 1 of
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 * Red Hat Distribution
92 *
93 * 06/01/05 Alan Cox Merged the ISI and base kernel strands
94 * into a single 2.6 driver
95 *
96 * ***********************************************************
97 *
Jiri Slabyd8d16e42006-01-09 20:54:21 -080098 * To use this driver you also need the support package. You
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 * can find this in RPM format on
100 * ftp://ftp.linux.org.uk/pub/linux/alan
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800101 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 * You can find the original tools for this direct from Multitech
103 * ftp://ftp.multitech.com/ISI-Cards/
104 *
105 * Having installed the cards the module options (/etc/modprobe.conf)
106 *
107 * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4
108 *
109 * Omit those entries for boards you don't have installed.
110 *
111 * TODO
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 * Merge testing
113 * 64-bit verification
114 */
115
116#include <linux/module.h>
Jiri Slabye65c1db2006-01-09 20:54:25 -0800117#include <linux/firmware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118#include <linux/kernel.h>
119#include <linux/tty.h>
Alan Cox33f0f882006-01-09 20:54:13 -0800120#include <linux/tty_flip.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121#include <linux/termios.h>
122#include <linux/fs.h>
123#include <linux/sched.h>
124#include <linux/serial.h>
Alexey Dobriyan405f5572009-07-11 22:08:37 +0400125#include <linux/smp_lock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127#include <linux/interrupt.h>
128#include <linux/timer.h>
129#include <linux/delay.h>
130#include <linux/ioport.h>
131
Alan Cox251b8dd2008-04-30 00:54:12 -0700132#include <linux/uaccess.h>
133#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134#include <asm/system.h>
135
136#include <linux/pci.h>
137
138#include <linux/isicom.h>
139
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800140#define InterruptTheCard(base) outw(0, (base) + 0xc)
141#define ClearInterrupt(base) inw((base) + 0x0a)
142
Jiri Slaby73b52572007-05-08 00:36:29 -0700143#define pr_dbg(str...) pr_debug("ISICOM: " str)
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800144#ifdef DEBUG
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800145#define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
146#else
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800147#define isicom_paranoia_check(a, b, c) 0
148#endif
149
Jiri Slaby9ac09482006-01-09 20:54:24 -0800150static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
151static void __devexit isicom_remove(struct pci_dev *);
152
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153static struct pci_device_id isicom_pci_tbl[] = {
Jiri Slaby9ac09482006-01-09 20:54:24 -0800154 { PCI_DEVICE(VENDOR_ID, 0x2028) },
155 { PCI_DEVICE(VENDOR_ID, 0x2051) },
156 { PCI_DEVICE(VENDOR_ID, 0x2052) },
157 { PCI_DEVICE(VENDOR_ID, 0x2053) },
158 { PCI_DEVICE(VENDOR_ID, 0x2054) },
159 { PCI_DEVICE(VENDOR_ID, 0x2055) },
160 { PCI_DEVICE(VENDOR_ID, 0x2056) },
161 { PCI_DEVICE(VENDOR_ID, 0x2057) },
162 { PCI_DEVICE(VENDOR_ID, 0x2058) },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 { 0 }
164};
165MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
166
Jiri Slaby9ac09482006-01-09 20:54:24 -0800167static struct pci_driver isicom_driver = {
168 .name = "isicom",
169 .id_table = isicom_pci_tbl,
170 .probe = isicom_probe,
171 .remove = __devexit_p(isicom_remove)
172};
173
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174static int prev_card = 3; /* start servicing isi_card[0] */
175static struct tty_driver *isicom_normal;
176
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177static void isicom_tx(unsigned long _data);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800178static void isicom_start(struct tty_struct *tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
Jiri Slaby34b55b82006-12-08 02:38:55 -0800180static DEFINE_TIMER(tx, isicom_tx, 0, 0);
181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182/* baud index mappings from linux defns to isi */
183
184static signed char linuxb_to_isib[] = {
Jiri Slaby7edc1362007-02-10 01:44:54 -0800185 -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 -0700186};
187
188struct isi_board {
Jiri Slaby8070e352006-01-09 20:54:22 -0800189 unsigned long base;
Jiri Slaby4969b3a2007-07-17 04:05:18 -0700190 int irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 unsigned char port_count;
192 unsigned short status;
Jiri Slabya547dfe2006-01-09 20:54:26 -0800193 unsigned short port_status; /* each bit for each port */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 unsigned short shift_count;
Alan Cox251b8dd2008-04-30 00:54:12 -0700195 struct isi_port *ports;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 signed char count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
198 unsigned long flags;
Jiri Slaby938a7022006-12-08 02:38:52 -0800199 unsigned int index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200};
201
202struct isi_port {
203 unsigned short magic;
Alan Coxf1d03222008-07-16 21:55:45 +0100204 struct tty_port port;
Jiri Slaby8070e352006-01-09 20:54:22 -0800205 u16 channel;
206 u16 status;
Alan Cox251b8dd2008-04-30 00:54:12 -0700207 struct isi_board *card;
Alan Cox251b8dd2008-04-30 00:54:12 -0700208 unsigned char *xmit_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 int xmit_head;
210 int xmit_tail;
211 int xmit_cnt;
212};
213
214static struct isi_board isi_card[BOARD_COUNT];
215static struct isi_port isi_ports[PORT_COUNT];
216
217/*
218 * Locking functions for card level locking. We need to own both
219 * the kernel lock for the card and have the card in a position that
220 * it wants to talk.
221 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800222
Jiri Slaby4969b3a2007-07-17 04:05:18 -0700223static inline int WaitTillCardIsFree(unsigned long base)
Jiri Slabycfe7c092006-12-29 16:48:00 -0800224{
225 unsigned int count = 0;
226 unsigned int a = in_atomic(); /* do we run under spinlock? */
227
228 while (!(inw(base + 0xe) & 0x1) && count++ < 100)
229 if (a)
230 mdelay(1);
231 else
232 msleep(1);
233
234 return !(inw(base + 0xe) & 0x1);
235}
236
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237static int lock_card(struct isi_board *card)
238{
Jiri Slaby8070e352006-01-09 20:54:22 -0800239 unsigned long base = card->base;
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700240 unsigned int retries, a;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700242 for (retries = 0; retries < 10; retries++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 spin_lock_irqsave(&card->card_lock, card->flags);
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700244 for (a = 0; a < 10; a++) {
245 if (inw(base + 0xe) & 0x1)
246 return 1;
247 udelay(10);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 }
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700249 spin_unlock_irqrestore(&card->card_lock, card->flags);
250 msleep(10);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800252 printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n",
253 card->base);
254
Adrian Bunk04187262006-06-30 18:23:04 +0200255 return 0; /* Failed to acquire the card! */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256}
257
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258static void unlock_card(struct isi_board *card)
259{
260 spin_unlock_irqrestore(&card->card_lock, card->flags);
261}
262
263/*
264 * ISI Card specific ops ...
265 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800266
Jiri Slabycfe7c092006-12-29 16:48:00 -0800267/* card->lock HAS to be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800268static void raise_dtr(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800270 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800271 unsigned long base = card->base;
272 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
Jiri Slabycfe7c092006-12-29 16:48:00 -0800274 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 return;
276
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800277 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 outw(0x0504, base);
279 InterruptTheCard(base);
280 port->status |= ISI_DTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281}
282
Jiri Slabycfe7c092006-12-29 16:48:00 -0800283/* card->lock HAS to be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800284static inline void drop_dtr(struct isi_port *port)
285{
286 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800287 unsigned long base = card->base;
288 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
Jiri Slabycfe7c092006-12-29 16:48:00 -0800290 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 return;
292
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800293 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 outw(0x0404, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800295 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 port->status &= ~ISI_DTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297}
298
Jiri Slabycfe7c092006-12-29 16:48:00 -0800299/* card->lock HAS to be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800300static inline void raise_rts(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800302 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800303 unsigned long base = card->base;
304 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305
Jiri Slabycfe7c092006-12-29 16:48:00 -0800306 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 return;
308
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800309 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 outw(0x0a04, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800311 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 port->status |= ISI_RTS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313}
Jiri Slabycfe7c092006-12-29 16:48:00 -0800314
315/* card->lock HAS to be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800316static inline void drop_rts(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800318 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800319 unsigned long base = card->base;
320 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
Jiri Slabycfe7c092006-12-29 16:48:00 -0800322 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 return;
324
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800325 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 outw(0x0804, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800327 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 port->status &= ~ISI_RTS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329}
330
Jiri Slabycfe7c092006-12-29 16:48:00 -0800331/* card->lock MUST NOT be held */
Alan Cox5d951fb2009-01-02 13:45:19 +0000332
Alan Coxfcc8ac12009-06-11 12:24:17 +0100333static void isicom_dtr_rts(struct tty_port *port, int on)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334{
Alan Cox5d951fb2009-01-02 13:45:19 +0000335 struct isi_port *ip = container_of(port, struct isi_port, port);
336 struct isi_board *card = ip->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800337 unsigned long base = card->base;
Alan Cox5d951fb2009-01-02 13:45:19 +0000338 u16 channel = ip->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
340 if (!lock_card(card))
341 return;
342
Alan Coxfcc8ac12009-06-11 12:24:17 +0100343 if (on) {
344 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
345 outw(0x0f04, base);
346 InterruptTheCard(base);
347 ip->status |= (ISI_DTR | ISI_RTS);
348 } else {
349 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
350 outw(0x0C04, base);
351 InterruptTheCard(base);
352 ip->status &= ~(ISI_DTR | ISI_RTS);
353 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 unlock_card(card);
355}
356
Jiri Slabycfe7c092006-12-29 16:48:00 -0800357/* card->lock HAS to be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800358static void drop_dtr_rts(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800360 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800361 unsigned long base = card->base;
362 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363
Jiri Slabycfe7c092006-12-29 16:48:00 -0800364 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 return;
366
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800367 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 outw(0x0c04, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800369 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 port->status &= ~(ISI_RTS | ISI_DTR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371}
372
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373/*
374 * ISICOM Driver specific routines ...
375 *
376 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800377
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800378static inline int __isicom_paranoia_check(struct isi_port const *port,
379 char *name, const char *routine)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 if (!port) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800382 printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for "
383 "dev %s in %s.\n", name, routine);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 return 1;
385 }
386 if (port->magic != ISICOM_MAGIC) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800387 printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for "
388 "dev %s in %s.\n", name, routine);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 return 1;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800390 }
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800391
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 return 0;
393}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800394
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395/*
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800396 * Transmitter.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 *
398 * We shovel data into the card buffers on a regular basis. The card
399 * will do the rest of the work for us.
400 */
401
402static void isicom_tx(unsigned long _data)
403{
Jiri Slaby4969b3a2007-07-17 04:05:18 -0700404 unsigned long flags, base;
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700405 unsigned int retries;
Jiri Slaby4969b3a2007-07-17 04:05:18 -0700406 short count = (BOARD_COUNT-1), card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 short txcount, wrd, residue, word_count, cnt;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800408 struct isi_port *port;
409 struct tty_struct *tty;
410
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 /* find next active board */
412 card = (prev_card + 1) & 0x0003;
Alan Cox251b8dd2008-04-30 00:54:12 -0700413 while (count-- > 0) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800414 if (isi_card[card].status & BOARD_ACTIVE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 break;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800416 card = (card + 1) & 0x0003;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 }
418 if (!(isi_card[card].status & BOARD_ACTIVE))
419 goto sched_again;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800420
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 prev_card = card;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800422
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 count = isi_card[card].port_count;
424 port = isi_card[card].ports;
425 base = isi_card[card].base;
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700426
427 spin_lock_irqsave(&isi_card[card].card_lock, flags);
428 for (retries = 0; retries < 100; retries++) {
429 if (inw(base + 0xe) & 0x1)
430 break;
431 udelay(2);
432 }
433 if (retries >= 100)
434 goto unlock;
435
Alan Coxd450b5a2008-10-13 10:39:58 +0100436 tty = tty_port_tty_get(&port->port);
437 if (tty == NULL)
438 goto put_unlock;
439
Alan Cox251b8dd2008-04-30 00:54:12 -0700440 for (; count > 0; count--, port++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 /* port not active or tx disabled to force flow control */
Alan Coxf1d03222008-07-16 21:55:45 +0100442 if (!(port->port.flags & ASYNC_INITIALIZED) ||
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800443 !(port->status & ISI_TXOK))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 continue;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800445
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700447 if (txcount <= 0 || tty->stopped || tty->hw_stopped)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 continue;
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700449
450 if (!(inw(base + 0x02) & (1 << port->channel)))
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800451 continue;
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700452
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800453 pr_dbg("txing %d bytes, port%d.\n", txcount,
454 port->channel + 1);
455 outw((port->channel << isi_card[card].shift_count) | txcount,
456 base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 residue = NO;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800458 wrd = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 while (1) {
Jiri Slabya547dfe2006-01-09 20:54:26 -0800460 cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
461 - port->xmit_tail));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 if (residue == YES) {
463 residue = NO;
464 if (cnt > 0) {
Alan Coxf1d03222008-07-16 21:55:45 +0100465 wrd |= (port->port.xmit_buf[port->xmit_tail]
Jiri Slabya547dfe2006-01-09 20:54:26 -0800466 << 8);
467 port->xmit_tail = (port->xmit_tail + 1)
468 & (SERIAL_XMIT_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 port->xmit_cnt--;
470 txcount--;
471 cnt--;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800472 outw(wrd, base);
Jiri Slabya547dfe2006-01-09 20:54:26 -0800473 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 outw(wrd, base);
475 break;
476 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800477 }
Alan Cox251b8dd2008-04-30 00:54:12 -0700478 if (cnt <= 0)
479 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 word_count = cnt >> 1;
Alan Coxf1d03222008-07-16 21:55:45 +0100481 outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
Jiri Slabya547dfe2006-01-09 20:54:26 -0800482 port->xmit_tail = (port->xmit_tail
483 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 txcount -= (word_count << 1);
485 port->xmit_cnt -= (word_count << 1);
486 if (cnt & 0x0001) {
487 residue = YES;
Alan Coxf1d03222008-07-16 21:55:45 +0100488 wrd = port->port.xmit_buf[port->xmit_tail];
Jiri Slabya547dfe2006-01-09 20:54:26 -0800489 port->xmit_tail = (port->xmit_tail + 1)
490 & (SERIAL_XMIT_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 port->xmit_cnt--;
492 txcount--;
493 }
494 }
495
496 InterruptTheCard(base);
497 if (port->xmit_cnt <= 0)
498 port->status &= ~ISI_TXOK;
499 if (port->xmit_cnt <= WAKEUP_CHARS)
Jiri Slaby0aa5de82007-02-10 01:44:47 -0800500 tty_wakeup(tty);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800501 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502
Alan Coxd450b5a2008-10-13 10:39:58 +0100503put_unlock:
504 tty_kref_put(tty);
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700505unlock:
506 spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800507 /* schedule another tx for hopefully in about 10ms */
508sched_again:
Jiri Slaby34b55b82006-12-08 02:38:55 -0800509 mod_timer(&tx, jiffies + msecs_to_jiffies(10));
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800510}
511
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512/*
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800513 * Main interrupt handler routine
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800515
David Howells7d12e782006-10-05 14:55:46 +0100516static irqreturn_t isicom_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517{
Jiri Slaby8070e352006-01-09 20:54:22 -0800518 struct isi_board *card = dev_id;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800519 struct isi_port *port;
520 struct tty_struct *tty;
Jiri Slaby8070e352006-01-09 20:54:22 -0800521 unsigned long base;
522 u16 header, word_count, count, channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 short byte_count;
Alan Cox33f0f882006-01-09 20:54:13 -0800524 unsigned char *rp;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800525
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 if (!card || !(card->status & FIRMWARE_LOADED))
527 return IRQ_NONE;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800528
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 base = card->base;
Jiri Slabycb4a10c2007-02-10 01:44:53 -0800530
531 /* did the card interrupt us? */
532 if (!(inw(base + 0x0e) & 0x02))
533 return IRQ_NONE;
534
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 spin_lock(&card->card_lock);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800536
Jiri Slaby18234f82006-12-08 02:38:51 -0800537 /*
538 * disable any interrupts from the PCI card and lower the
539 * interrupt line
540 */
541 outw(0x8000, base+0x04);
542 ClearInterrupt(base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800543
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 inw(base); /* get the dummy word out */
545 header = inw(base);
546 channel = (header & 0x7800) >> card->shift_count;
547 byte_count = header & 0xff;
548
549 if (channel + 1 > card->port_count) {
Jiri Slabya547dfe2006-01-09 20:54:26 -0800550 printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): "
551 "%d(channel) > port_count.\n", base, channel+1);
Jiri Slaby18234f82006-12-08 02:38:51 -0800552 outw(0x0000, base+0x04); /* enable interrupts */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 spin_unlock(&card->card_lock);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800554 return IRQ_HANDLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 }
556 port = card->ports + channel;
Alan Coxf1d03222008-07-16 21:55:45 +0100557 if (!(port->port.flags & ASYNC_INITIALIZED)) {
Jiri Slaby18234f82006-12-08 02:38:51 -0800558 outw(0x0000, base+0x04); /* enable interrupts */
Jiri Slaby174f1302007-02-10 01:44:52 -0800559 spin_unlock(&card->card_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 return IRQ_HANDLED;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800561 }
562
Alan Coxd450b5a2008-10-13 10:39:58 +0100563 tty = tty_port_tty_get(&port->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 if (tty == NULL) {
565 word_count = byte_count >> 1;
Alan Cox251b8dd2008-04-30 00:54:12 -0700566 while (byte_count > 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 inw(base);
568 byte_count -= 2;
569 }
570 if (byte_count & 0x01)
571 inw(base);
Jiri Slaby18234f82006-12-08 02:38:51 -0800572 outw(0x0000, base+0x04); /* enable interrupts */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 spin_unlock(&card->card_lock);
574 return IRQ_HANDLED;
575 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800576
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 if (header & 0x8000) { /* Status Packet */
578 header = inw(base);
Alan Cox251b8dd2008-04-30 00:54:12 -0700579 switch (header & 0xff) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800580 case 0: /* Change in EIA signals */
Alan Coxf1d03222008-07-16 21:55:45 +0100581 if (port->port.flags & ASYNC_CHECK_CD) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800582 if (port->status & ISI_DCD) {
583 if (!(header & ISI_DCD)) {
584 /* Carrier has been lost */
Jiri Slabya547dfe2006-01-09 20:54:26 -0800585 pr_dbg("interrupt: DCD->low.\n"
586 );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 port->status &= ~ISI_DCD;
Jiri Slaby0aa5de82007-02-10 01:44:47 -0800588 tty_hangup(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800590 } else if (header & ISI_DCD) {
591 /* Carrier has been detected */
592 pr_dbg("interrupt: DCD->high.\n");
593 port->status |= ISI_DCD;
Alan Coxf1d03222008-07-16 21:55:45 +0100594 wake_up_interruptible(&port->port.open_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800596 } else {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800597 if (header & ISI_DCD)
598 port->status |= ISI_DCD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 else
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800600 port->status &= ~ISI_DCD;
601 }
602
Alan Coxf1d03222008-07-16 21:55:45 +0100603 if (port->port.flags & ASYNC_CTS_FLOW) {
Alan Coxd450b5a2008-10-13 10:39:58 +0100604 if (tty->hw_stopped) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800605 if (header & ISI_CTS) {
Alan Coxf1d03222008-07-16 21:55:45 +0100606 port->port.tty->hw_stopped = 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800607 /* start tx ing */
Jiri Slabya547dfe2006-01-09 20:54:26 -0800608 port->status |= (ISI_TXOK
609 | ISI_CTS);
Jiri Slaby0aa5de82007-02-10 01:44:47 -0800610 tty_wakeup(tty);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800611 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800612 } else if (!(header & ISI_CTS)) {
Alan Coxd450b5a2008-10-13 10:39:58 +0100613 tty->hw_stopped = 1;
Jiri Slabya547dfe2006-01-09 20:54:26 -0800614 /* stop tx ing */
615 port->status &= ~(ISI_TXOK | ISI_CTS);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800616 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800617 } else {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800618 if (header & ISI_CTS)
619 port->status |= ISI_CTS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 else
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800621 port->status &= ~ISI_CTS;
622 }
623
624 if (header & ISI_DSR)
625 port->status |= ISI_DSR;
626 else
627 port->status &= ~ISI_DSR;
628
629 if (header & ISI_RI)
630 port->status |= ISI_RI;
631 else
632 port->status &= ~ISI_RI;
633
634 break;
635
Jiri Slabya547dfe2006-01-09 20:54:26 -0800636 case 1: /* Received Break !!! */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800637 tty_insert_flip_char(tty, 0, TTY_BREAK);
Alan Coxf1d03222008-07-16 21:55:45 +0100638 if (port->port.flags & ASYNC_SAK)
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800639 do_SAK(tty);
640 tty_flip_buffer_push(tty);
641 break;
642
643 case 2: /* Statistics */
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800644 pr_dbg("isicom_interrupt: stats!!!.\n");
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800645 break;
646
647 default:
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800648 pr_dbg("Intr: Unknown code in status packet.\n");
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800649 break;
650 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800651 } else { /* Data Packet */
Alan Cox33f0f882006-01-09 20:54:13 -0800652
653 count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800654 pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 word_count = count >> 1;
Alan Cox33f0f882006-01-09 20:54:13 -0800656 insw(base, rp, word_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 byte_count -= (word_count << 1);
658 if (count & 0x0001) {
Jiri Slabya547dfe2006-01-09 20:54:26 -0800659 tty_insert_flip_char(tty, inw(base) & 0xff,
660 TTY_NORMAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 byte_count -= 2;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800662 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 if (byte_count > 0) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800664 pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping "
665 "bytes...\n", base, channel + 1);
Alan Cox251b8dd2008-04-30 00:54:12 -0700666 /* drain out unread xtra data */
667 while (byte_count > 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 inw(base);
669 byte_count -= 2;
670 }
671 }
Alan Cox33f0f882006-01-09 20:54:13 -0800672 tty_flip_buffer_push(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 }
Jiri Slaby18234f82006-12-08 02:38:51 -0800674 outw(0x0000, base+0x04); /* enable interrupts */
Jiri Slaby174f1302007-02-10 01:44:52 -0800675 spin_unlock(&card->card_lock);
Alan Coxd450b5a2008-10-13 10:39:58 +0100676 tty_kref_put(tty);
Jiri Slabya547dfe2006-01-09 20:54:26 -0800677
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 return IRQ_HANDLED;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800679}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680
Alan Coxd450b5a2008-10-13 10:39:58 +0100681static void isicom_config_port(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682{
Alan Coxd450b5a2008-10-13 10:39:58 +0100683 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800684 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 unsigned long baud;
Jiri Slaby8070e352006-01-09 20:54:22 -0800686 unsigned long base = card->base;
687 u16 channel_setup, channel = port->channel,
688 shift_count = card->shift_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 unsigned char flow_ctrl;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800690
Alan Cox251b8dd2008-04-30 00:54:12 -0700691 /* FIXME: Switch to new tty baud API */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 baud = C_BAUD(tty);
693 if (baud & CBAUDEX) {
694 baud &= ~CBAUDEX;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800695
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 /* if CBAUDEX bit is on and the baud is set to either 50 or 75
697 * then the card is programmed for 57.6Kbps or 115Kbps
698 * respectively.
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800699 */
700
Jiri Slaby7edc1362007-02-10 01:44:54 -0800701 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
702 if (baud < 1 || baud > 4)
Alan Coxd450b5a2008-10-13 10:39:58 +0100703 tty->termios->c_cflag &= ~CBAUDEX;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 else
705 baud += 15;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800706 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 if (baud == 15) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800708
709 /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 * by the set_serial_info ioctl ... this is done by
711 * the 'setserial' utility.
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800712 */
713
Alan Coxf1d03222008-07-16 21:55:45 +0100714 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800715 baud++; /* 57.6 Kbps */
Alan Coxf1d03222008-07-16 21:55:45 +0100716 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
Alan Cox251b8dd2008-04-30 00:54:12 -0700717 baud += 2; /* 115 Kbps */
Alan Coxf1d03222008-07-16 21:55:45 +0100718 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
Jiri Slaby7edc1362007-02-10 01:44:54 -0800719 baud += 3; /* 230 kbps*/
Alan Coxf1d03222008-07-16 21:55:45 +0100720 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
Jiri Slaby7edc1362007-02-10 01:44:54 -0800721 baud += 4; /* 460 kbps*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 }
723 if (linuxb_to_isib[baud] == -1) {
724 /* hang up */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800725 drop_dtr(port);
726 return;
Alan Cox251b8dd2008-04-30 00:54:12 -0700727 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 raise_dtr(port);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800729
Jiri Slabycfe7c092006-12-29 16:48:00 -0800730 if (WaitTillCardIsFree(base) == 0) {
Alan Cox251b8dd2008-04-30 00:54:12 -0700731 outw(0x8000 | (channel << shift_count) | 0x03, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
733 channel_setup = 0;
Alan Cox251b8dd2008-04-30 00:54:12 -0700734 switch (C_CSIZE(tty)) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800735 case CS5:
736 channel_setup |= ISICOM_CS5;
737 break;
738 case CS6:
739 channel_setup |= ISICOM_CS6;
740 break;
741 case CS7:
742 channel_setup |= ISICOM_CS7;
743 break;
744 case CS8:
745 channel_setup |= ISICOM_CS8;
746 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800748
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 if (C_CSTOPB(tty))
750 channel_setup |= ISICOM_2SB;
751 if (C_PARENB(tty)) {
752 channel_setup |= ISICOM_EVPAR;
753 if (C_PARODD(tty))
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800754 channel_setup |= ISICOM_ODPAR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800756 outw(channel_setup, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 InterruptTheCard(base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800758 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 if (C_CLOCAL(tty))
Alan Coxf1d03222008-07-16 21:55:45 +0100760 port->port.flags &= ~ASYNC_CHECK_CD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 else
Alan Coxf1d03222008-07-16 21:55:45 +0100762 port->port.flags |= ASYNC_CHECK_CD;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800763
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 /* flow control settings ...*/
765 flow_ctrl = 0;
Alan Coxf1d03222008-07-16 21:55:45 +0100766 port->port.flags &= ~ASYNC_CTS_FLOW;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 if (C_CRTSCTS(tty)) {
Alan Coxf1d03222008-07-16 21:55:45 +0100768 port->port.flags |= ASYNC_CTS_FLOW;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 flow_ctrl |= ISICOM_CTSRTS;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800770 }
771 if (I_IXON(tty))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
773 if (I_IXOFF(tty))
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800774 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
775
Jiri Slabycfe7c092006-12-29 16:48:00 -0800776 if (WaitTillCardIsFree(base) == 0) {
Alan Cox251b8dd2008-04-30 00:54:12 -0700777 outw(0x8000 | (channel << shift_count) | 0x04, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 outw(flow_ctrl << 8 | 0x05, base);
779 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
780 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800782
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 /* rx enabled -> enable port for rx on the card */
784 if (C_CREAD(tty)) {
785 card->port_status |= (1 << channel);
786 outw(card->port_status, base + 0x02);
787 }
788}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800790/* open et all */
791
792static inline void isicom_setup_board(struct isi_board *bp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793{
794 int channel;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800795 struct isi_port *port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800797
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 spin_lock_irqsave(&bp->card_lock, flags);
799 if (bp->status & BOARD_ACTIVE) {
800 spin_unlock_irqrestore(&bp->card_lock, flags);
801 return;
802 }
803 port = bp->ports;
804 bp->status |= BOARD_ACTIVE;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800805 for (channel = 0; channel < bp->port_count; channel++, port++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 drop_dtr_rts(port);
Jiri Slabycfe7c092006-12-29 16:48:00 -0800807 spin_unlock_irqrestore(&bp->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800809
Alan Coxd450b5a2008-10-13 10:39:58 +0100810static int isicom_setup_port(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811{
Alan Coxd450b5a2008-10-13 10:39:58 +0100812 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800813 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800815
Alan Coxf1d03222008-07-16 21:55:45 +0100816 if (port->port.flags & ASYNC_INITIALIZED)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 return 0;
Alan Coxf1d03222008-07-16 21:55:45 +0100818 if (tty_port_alloc_xmit_buf(&port->port) < 0)
819 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820
821 spin_lock_irqsave(&card->card_lock, flags);
Alan Coxd450b5a2008-10-13 10:39:58 +0100822 clear_bit(TTY_IO_ERROR, &tty->flags);
Alan Coxf1d03222008-07-16 21:55:45 +0100823 if (port->port.count == 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 card->count++;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800825
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800827
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 /* discard any residual data */
Jiri Slabycfe7c092006-12-29 16:48:00 -0800829 if (WaitTillCardIsFree(card->base) == 0) {
830 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
831 card->base);
832 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
833 InterruptTheCard(card->base);
834 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800835
Alan Coxd450b5a2008-10-13 10:39:58 +0100836 isicom_config_port(tty);
Alan Coxf1d03222008-07-16 21:55:45 +0100837 port->port.flags |= ASYNC_INITIALIZED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800839
840 return 0;
841}
842
Alan Cox31f35932009-01-02 13:45:05 +0000843static int isicom_carrier_raised(struct tty_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844{
Alan Cox31f35932009-01-02 13:45:05 +0000845 struct isi_port *ip = container_of(port, struct isi_port, port);
846 return (ip->status & ISI_DCD)?1 : 0;
847}
848
Alan Cox11d85d72009-09-19 13:13:27 -0700849static struct tty_port *isicom_find_port(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800851 struct isi_port *port;
852 struct isi_board *card;
Jiri Slaby17c4edf2006-12-08 02:38:57 -0800853 unsigned int board;
Alan Cox11d85d72009-09-19 13:13:27 -0700854 int line = tty->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 if (line < 0 || line > PORT_COUNT-1)
Alan Cox11d85d72009-09-19 13:13:27 -0700857 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 board = BOARD(line);
859 card = &isi_card[board];
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800860
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 if (!(card->status & FIRMWARE_LOADED))
Alan Cox11d85d72009-09-19 13:13:27 -0700862 return NULL;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800863
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 /* open on a port greater than the port count for the card !!! */
865 if (line > ((board * 16) + card->port_count - 1))
Alan Cox11d85d72009-09-19 13:13:27 -0700866 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800868 port = &isi_ports[line];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
Alan Cox11d85d72009-09-19 13:13:27 -0700870 return NULL;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800871
Alan Cox11d85d72009-09-19 13:13:27 -0700872 return &port->port;
873}
874
875static int isicom_open(struct tty_struct *tty, struct file *filp)
876{
877 struct isi_port *port;
878 struct isi_board *card;
879 struct tty_port *tport;
880 int error = 0;
881
882 tport = isicom_find_port(tty);
883 if (tport == NULL)
884 return -ENODEV;
885 port = container_of(tport, struct isi_port, port);
886 card = &isi_card[BOARD(tty->index)];
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800887 isicom_setup_board(card);
888
Alan Cox36c621d2009-01-02 13:46:10 +0000889 /* FIXME: locking on port.count etc */
Alan Coxf1d03222008-07-16 21:55:45 +0100890 port->port.count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 tty->driver_data = port;
Alan Coxd450b5a2008-10-13 10:39:58 +0100892 tty_port_tty_set(&port->port, tty);
Alan Cox11d85d72009-09-19 13:13:27 -0700893 /* FIXME: Locking on Initialized flag */
894 if (!test_bit(ASYNCB_INITIALIZED, &tport->flags))
895 error = isicom_setup_port(tty);
Alan Cox251b8dd2008-04-30 00:54:12 -0700896 if (error == 0)
Alan Cox36c621d2009-01-02 13:46:10 +0000897 error = tty_port_block_til_ready(&port->port, tty, filp);
Alan Cox251b8dd2008-04-30 00:54:12 -0700898 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800900
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901/* close et all */
902
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800903static inline void isicom_shutdown_board(struct isi_board *bp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904{
Alan Cox251b8dd2008-04-30 00:54:12 -0700905 if (bp->status & BOARD_ACTIVE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 bp->status &= ~BOARD_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907}
908
Jiri Slabycfe7c092006-12-29 16:48:00 -0800909/* card->lock HAS to be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800910static void isicom_shutdown_port(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800912 struct isi_board *card = port->card;
913 struct tty_struct *tty;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800914
Alan Coxd450b5a2008-10-13 10:39:58 +0100915 tty = tty_port_tty_get(&port->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916
Alan Coxd450b5a2008-10-13 10:39:58 +0100917 if (!(port->port.flags & ASYNC_INITIALIZED)) {
918 tty_kref_put(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 return;
Alan Coxd450b5a2008-10-13 10:39:58 +0100920 }
Jiri Slabycfe7c092006-12-29 16:48:00 -0800921
Alan Coxf1d03222008-07-16 21:55:45 +0100922 tty_port_free_xmit_buf(&port->port);
923 port->port.flags &= ~ASYNC_INITIALIZED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 /* 3rd October 2000 : Vinayak P Risbud */
Alan Coxd450b5a2008-10-13 10:39:58 +0100925 tty_port_tty_set(&port->port, NULL);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800926
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927 /*Fix done by Anil .S on 30-04-2001
928 remote login through isi port has dtr toggle problem
929 due to which the carrier drops before the password prompt
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800930 appears on the remote end. Now we drop the dtr only if the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 HUPCL(Hangup on close) flag is set for the tty*/
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800932
933 if (C_HUPCL(tty))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 /* drop dtr on this port */
935 drop_dtr(port);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800936
937 /* any other port uninits */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 if (tty)
939 set_bit(TTY_IO_ERROR, &tty->flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800940
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 if (--card->count < 0) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800942 pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 card->base, card->count);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800944 card->count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800946
Jiri Slabya547dfe2006-01-09 20:54:26 -0800947 /* last port was closed, shutdown that boad too */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800948 if (C_HUPCL(tty)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 if (!card->count)
950 isicom_shutdown_board(card);
951 }
Alan Coxbbb8e6b2009-04-06 17:33:55 +0100952 tty_kref_put(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953}
954
Alan Cox978e5952008-04-30 00:53:59 -0700955static void isicom_flush_buffer(struct tty_struct *tty)
956{
957 struct isi_port *port = tty->driver_data;
958 struct isi_board *card = port->card;
959 unsigned long flags;
960
961 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
962 return;
963
964 spin_lock_irqsave(&card->card_lock, flags);
965 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
966 spin_unlock_irqrestore(&card->card_lock, flags);
967
968 tty_wakeup(tty);
969}
970
Alan Cox6f6412b2009-09-19 13:13:21 -0700971static void isicom_close_port(struct tty_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972{
Alan Cox6f6412b2009-09-19 13:13:21 -0700973 struct isi_port *ip = container_of(port, struct isi_port, port);
974 struct isi_board *card = ip->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800976
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800977 /* indicate to the card that no more data can be received
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978 on this port */
979 spin_lock_irqsave(&card->card_lock, flags);
Alan Coxa6614992009-01-02 13:46:50 +0000980 if (port->flags & ASYNC_INITIALIZED) {
981 card->port_status &= ~(1 << ip->channel);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982 outw(card->port_status, card->base + 0x02);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800983 }
Alan Coxa6614992009-01-02 13:46:50 +0000984 isicom_shutdown_port(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 spin_unlock_irqrestore(&card->card_lock, flags);
Alan Cox6f6412b2009-09-19 13:13:21 -0700986}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800987
Alan Cox6f6412b2009-09-19 13:13:21 -0700988static void isicom_close(struct tty_struct *tty, struct file *filp)
989{
990 struct isi_port *ip = tty->driver_data;
991 struct tty_port *port = &ip->port;
992 if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
993 return;
994
995 if (tty_port_close_start(port, tty, filp) == 0)
996 return;
997 isicom_close_port(port);
Alan Cox978e5952008-04-30 00:53:59 -0700998 isicom_flush_buffer(tty);
Alan Coxa6614992009-01-02 13:46:50 +0000999 tty_port_close_end(port, tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000}
1001
1002/* write et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001003static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
1004 int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005{
Jiri Slaby8070e352006-01-09 20:54:22 -08001006 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001007 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 unsigned long flags;
1009 int cnt, total = 0;
1010
1011 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
1012 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001013
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001015
Alan Cox251b8dd2008-04-30 00:54:12 -07001016 while (1) {
Jiri Slabya547dfe2006-01-09 20:54:26 -08001017 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
1018 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001019 if (cnt <= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 break;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001021
Alan Coxf1d03222008-07-16 21:55:45 +01001022 memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
Jiri Slabya547dfe2006-01-09 20:54:26 -08001023 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
1024 - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025 port->xmit_cnt += cnt;
1026 buf += cnt;
1027 count -= cnt;
1028 total += cnt;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001029 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
1031 port->status |= ISI_TXOK;
1032 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001033 return total;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034}
1035
1036/* put_char et all */
Alan Coxf34d7a52008-04-30 00:54:13 -07001037static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038{
Jiri Slaby8070e352006-01-09 20:54:22 -08001039 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001040 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001042
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
Alan Coxf34d7a52008-04-30 00:54:13 -07001044 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001045
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 spin_lock_irqsave(&card->card_lock, flags);
Alan Coxf34d7a52008-04-30 00:54:13 -07001047 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
1048 spin_unlock_irqrestore(&card->card_lock, flags);
1049 return 0;
1050 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001051
Alan Coxf1d03222008-07-16 21:55:45 +01001052 port->port.xmit_buf[port->xmit_head++] = ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
1054 port->xmit_cnt++;
1055 spin_unlock_irqrestore(&card->card_lock, flags);
Alan Coxf34d7a52008-04-30 00:54:13 -07001056 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057}
1058
1059/* flush_chars et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001060static void isicom_flush_chars(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061{
Jiri Slaby8070e352006-01-09 20:54:22 -08001062 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001063
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1065 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001066
Jiri Slabya547dfe2006-01-09 20:54:26 -08001067 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
Alan Coxf1d03222008-07-16 21:55:45 +01001068 !port->port.xmit_buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001070
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071 /* this tells the transmitter to consider this port for
1072 data output to the card ... that's the best we can do. */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001073 port->status |= ISI_TXOK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074}
1075
1076/* write_room et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001077static int isicom_write_room(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078{
Jiri Slaby8070e352006-01-09 20:54:22 -08001079 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080 int free;
1081
1082 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1083 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001084
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1086 if (free < 0)
1087 free = 0;
1088 return free;
1089}
1090
1091/* chars_in_buffer et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001092static int isicom_chars_in_buffer(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093{
Jiri Slaby8070e352006-01-09 20:54:22 -08001094 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1096 return 0;
1097 return port->xmit_cnt;
1098}
1099
1100/* ioctl et all */
Alan Cox6d889722008-07-22 11:18:21 +01001101static int isicom_send_break(struct tty_struct *tty, int length)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102{
Alan Cox6d889722008-07-22 11:18:21 +01001103 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001104 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -08001105 unsigned long base = card->base;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001106
Alan Cox6d889722008-07-22 11:18:21 +01001107 if (length == -1)
1108 return -EOPNOTSUPP;
1109
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001110 if (!lock_card(card))
Alan Cox6d889722008-07-22 11:18:21 +01001111 return -EINVAL;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001112
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1114 outw((length & 0xff) << 8 | 0x00, base);
1115 outw((length & 0xff00), base);
1116 InterruptTheCard(base);
1117
1118 unlock_card(card);
Alan Cox6d889722008-07-22 11:18:21 +01001119 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120}
1121
1122static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
1123{
Jiri Slaby8070e352006-01-09 20:54:22 -08001124 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 /* just send the port status */
Jiri Slaby8070e352006-01-09 20:54:22 -08001126 u16 status = port->status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127
1128 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1129 return -ENODEV;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001130
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1132 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1133 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1134 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1135 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1136 ((status & ISI_RI ) ? TIOCM_RI : 0);
1137}
1138
1139static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001140 unsigned int set, unsigned int clear)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141{
Jiri Slaby8070e352006-01-09 20:54:22 -08001142 struct isi_port *port = tty->driver_data;
Jiri Slabycfe7c092006-12-29 16:48:00 -08001143 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001144
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1146 return -ENODEV;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001147
Jiri Slabycfe7c092006-12-29 16:48:00 -08001148 spin_lock_irqsave(&port->card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149 if (set & TIOCM_RTS)
1150 raise_rts(port);
1151 if (set & TIOCM_DTR)
1152 raise_dtr(port);
1153
1154 if (clear & TIOCM_RTS)
1155 drop_rts(port);
1156 if (clear & TIOCM_DTR)
1157 drop_dtr(port);
Jiri Slabycfe7c092006-12-29 16:48:00 -08001158 spin_unlock_irqrestore(&port->card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159
1160 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001161}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162
Alan Coxd450b5a2008-10-13 10:39:58 +01001163static int isicom_set_serial_info(struct tty_struct *tty,
1164 struct serial_struct __user *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165{
Alan Coxd450b5a2008-10-13 10:39:58 +01001166 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167 struct serial_struct newinfo;
1168 int reconfig_port;
1169
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001170 if (copy_from_user(&newinfo, info, sizeof(newinfo)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 return -EFAULT;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001172
Alan Cox1eac4942008-04-30 00:53:19 -07001173 lock_kernel();
1174
Alan Coxf1d03222008-07-16 21:55:45 +01001175 reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001176 (newinfo.flags & ASYNC_SPD_MASK));
1177
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 if (!capable(CAP_SYS_ADMIN)) {
Alan Cox44b7d1b2008-07-16 21:57:18 +01001179 if ((newinfo.close_delay != port->port.close_delay) ||
1180 (newinfo.closing_wait != port->port.closing_wait) ||
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001181 ((newinfo.flags & ~ASYNC_USR_MASK) !=
Alan Coxf1d03222008-07-16 21:55:45 +01001182 (port->port.flags & ~ASYNC_USR_MASK))) {
Alan Cox1eac4942008-04-30 00:53:19 -07001183 unlock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184 return -EPERM;
Alan Cox1eac4942008-04-30 00:53:19 -07001185 }
Alan Coxf1d03222008-07-16 21:55:45 +01001186 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187 (newinfo.flags & ASYNC_USR_MASK));
Alan Cox251b8dd2008-04-30 00:54:12 -07001188 } else {
Alan Cox44b7d1b2008-07-16 21:57:18 +01001189 port->port.close_delay = newinfo.close_delay;
1190 port->port.closing_wait = newinfo.closing_wait;
Alan Coxf1d03222008-07-16 21:55:45 +01001191 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192 (newinfo.flags & ASYNC_FLAGS));
1193 }
1194 if (reconfig_port) {
Jiri Slabycfe7c092006-12-29 16:48:00 -08001195 unsigned long flags;
1196 spin_lock_irqsave(&port->card->card_lock, flags);
Alan Coxd450b5a2008-10-13 10:39:58 +01001197 isicom_config_port(tty);
Jiri Slabycfe7c092006-12-29 16:48:00 -08001198 spin_unlock_irqrestore(&port->card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199 }
Alan Cox1eac4942008-04-30 00:53:19 -07001200 unlock_kernel();
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001201 return 0;
1202}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001204static int isicom_get_serial_info(struct isi_port *port,
1205 struct serial_struct __user *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206{
1207 struct serial_struct out_info;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001208
Alan Cox1eac4942008-04-30 00:53:19 -07001209 lock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 memset(&out_info, 0, sizeof(out_info));
1211/* out_info.type = ? */
1212 out_info.line = port - isi_ports;
1213 out_info.port = port->card->base;
1214 out_info.irq = port->card->irq;
Alan Coxf1d03222008-07-16 21:55:45 +01001215 out_info.flags = port->port.flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216/* out_info.baud_base = ? */
Alan Cox44b7d1b2008-07-16 21:57:18 +01001217 out_info.close_delay = port->port.close_delay;
1218 out_info.closing_wait = port->port.closing_wait;
Alan Cox1eac4942008-04-30 00:53:19 -07001219 unlock_kernel();
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001220 if (copy_to_user(info, &out_info, sizeof(out_info)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221 return -EFAULT;
1222 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001223}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001225static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
1226 unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227{
Jiri Slaby8070e352006-01-09 20:54:22 -08001228 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229 void __user *argp = (void __user *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230
1231 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1232 return -ENODEV;
1233
Alan Cox251b8dd2008-04-30 00:54:12 -07001234 switch (cmd) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001235 case TIOCGSERIAL:
1236 return isicom_get_serial_info(port, argp);
1237
1238 case TIOCSSERIAL:
Alan Coxd450b5a2008-10-13 10:39:58 +01001239 return isicom_set_serial_info(tty, argp);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001240
1241 default:
1242 return -ENOIOCTLCMD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 }
1244 return 0;
1245}
1246
1247/* set_termios et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001248static void isicom_set_termios(struct tty_struct *tty,
Alan Cox606d0992006-12-08 02:38:45 -08001249 struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250{
Jiri Slaby8070e352006-01-09 20:54:22 -08001251 struct isi_port *port = tty->driver_data;
Jiri Slabycfe7c092006-12-29 16:48:00 -08001252 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001253
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1255 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001256
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257 if (tty->termios->c_cflag == old_termios->c_cflag &&
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001258 tty->termios->c_iflag == old_termios->c_iflag)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001260
Jiri Slabycfe7c092006-12-29 16:48:00 -08001261 spin_lock_irqsave(&port->card->card_lock, flags);
Alan Coxd450b5a2008-10-13 10:39:58 +01001262 isicom_config_port(tty);
Jiri Slabycfe7c092006-12-29 16:48:00 -08001263 spin_unlock_irqrestore(&port->card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001264
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265 if ((old_termios->c_cflag & CRTSCTS) &&
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001266 !(tty->termios->c_cflag & CRTSCTS)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267 tty->hw_stopped = 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001268 isicom_start(tty);
1269 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270}
1271
1272/* throttle et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001273static void isicom_throttle(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274{
Jiri Slaby8070e352006-01-09 20:54:22 -08001275 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001276 struct isi_board *card = port->card;
1277
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1279 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001280
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281 /* tell the card that this port cannot handle any more data for now */
1282 card->port_status &= ~(1 << port->channel);
1283 outw(card->port_status, card->base + 0x02);
1284}
1285
1286/* unthrottle et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001287static void isicom_unthrottle(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288{
Jiri Slaby8070e352006-01-09 20:54:22 -08001289 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001290 struct isi_board *card = port->card;
1291
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1293 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001294
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295 /* tell the card that this port is ready to accept more data */
1296 card->port_status |= (1 << port->channel);
1297 outw(card->port_status, card->base + 0x02);
1298}
1299
1300/* stop et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001301static void isicom_stop(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302{
Jiri Slaby8070e352006-01-09 20:54:22 -08001303 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304
1305 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1306 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001307
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 /* this tells the transmitter not to consider this port for
1309 data output to the card. */
1310 port->status &= ~ISI_TXOK;
1311}
1312
1313/* start et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001314static void isicom_start(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315{
Jiri Slaby8070e352006-01-09 20:54:22 -08001316 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001317
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1319 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001320
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321 /* this tells the transmitter to consider this port for
1322 data output to the card. */
1323 port->status |= ISI_TXOK;
1324}
1325
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001326static void isicom_hangup(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327{
Jiri Slaby8070e352006-01-09 20:54:22 -08001328 struct isi_port *port = tty->driver_data;
Jiri Slabycfe7c092006-12-29 16:48:00 -08001329 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001330
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1332 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001333
Jiri Slabycfe7c092006-12-29 16:48:00 -08001334 spin_lock_irqsave(&port->card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335 isicom_shutdown_port(port);
Jiri Slabycfe7c092006-12-29 16:48:00 -08001336 spin_unlock_irqrestore(&port->card->card_lock, flags);
1337
Alan Cox3e616962009-01-02 13:45:26 +00001338 tty_port_hangup(&port->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339}
1340
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341
Jiri Slaby9ac09482006-01-09 20:54:24 -08001342/*
1343 * Driver init and deinit functions
1344 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345
Jeff Dikeb68e31d2006-10-02 02:17:18 -07001346static const struct tty_operations isicom_ops = {
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001347 .open = isicom_open,
1348 .close = isicom_close,
1349 .write = isicom_write,
1350 .put_char = isicom_put_char,
1351 .flush_chars = isicom_flush_chars,
1352 .write_room = isicom_write_room,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353 .chars_in_buffer = isicom_chars_in_buffer,
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001354 .ioctl = isicom_ioctl,
1355 .set_termios = isicom_set_termios,
1356 .throttle = isicom_throttle,
1357 .unthrottle = isicom_unthrottle,
1358 .stop = isicom_stop,
1359 .start = isicom_start,
1360 .hangup = isicom_hangup,
1361 .flush_buffer = isicom_flush_buffer,
1362 .tiocmget = isicom_tiocmget,
1363 .tiocmset = isicom_tiocmset,
Alan Cox6d889722008-07-22 11:18:21 +01001364 .break_ctl = isicom_send_break,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365};
1366
Alan Cox31f35932009-01-02 13:45:05 +00001367static const struct tty_port_operations isicom_port_ops = {
1368 .carrier_raised = isicom_carrier_raised,
Alan Coxfcc8ac12009-06-11 12:24:17 +01001369 .dtr_rts = isicom_dtr_rts,
Alan Cox31f35932009-01-02 13:45:05 +00001370};
1371
Jiri Slaby9ac09482006-01-09 20:54:24 -08001372static int __devinit reset_card(struct pci_dev *pdev,
1373 const unsigned int card, unsigned int *signature)
1374{
1375 struct isi_board *board = pci_get_drvdata(pdev);
1376 unsigned long base = board->base;
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001377 unsigned int sig, portcount = 0;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001378 int retval = 0;
1379
1380 dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1381 base);
1382
1383 inw(base + 0x8);
1384
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001385 msleep(10);
Jiri Slaby9ac09482006-01-09 20:54:24 -08001386
1387 outw(0, base + 0x8); /* Reset */
1388
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001389 msleep(1000);
Jiri Slaby9ac09482006-01-09 20:54:24 -08001390
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001391 sig = inw(base + 0x4) & 0xff;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001392
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001393 if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1394 sig != 0xee) {
1395 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1396 "bad I/O Port Address 0x%lx).\n", card + 1, base);
1397 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
Jiri Slaby18234f82006-12-08 02:38:51 -08001398 retval = -EIO;
1399 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001402 msleep(10);
1403
1404 portcount = inw(base + 0x2);
Julia Lawall07fb6f22008-03-04 14:29:17 -08001405 if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001406 portcount != 8 && portcount != 16)) {
Joe Perches898eb712007-10-18 03:06:30 -07001407 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001408 card + 1);
1409 retval = -EIO;
1410 goto end;
1411 }
1412
1413 switch (sig) {
Jiri Slaby9ac09482006-01-09 20:54:24 -08001414 case 0xa5:
1415 case 0xbb:
1416 case 0xdd:
Jiri Slaby18234f82006-12-08 02:38:51 -08001417 board->port_count = (portcount == 4) ? 4 : 8;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001418 board->shift_count = 12;
1419 break;
1420 case 0xcc:
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001421 case 0xee:
Jiri Slaby9ac09482006-01-09 20:54:24 -08001422 board->port_count = 16;
1423 board->shift_count = 11;
1424 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425 }
Jiri Slaby9ac09482006-01-09 20:54:24 -08001426 dev_info(&pdev->dev, "-Done\n");
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001427 *signature = sig;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001428
1429end:
1430 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431}
1432
Jiri Slabye65c1db2006-01-09 20:54:25 -08001433static int __devinit load_firmware(struct pci_dev *pdev,
1434 const unsigned int index, const unsigned int signature)
1435{
1436 struct isi_board *board = pci_get_drvdata(pdev);
1437 const struct firmware *fw;
1438 unsigned long base = board->base;
1439 unsigned int a;
1440 u16 word_count, status;
1441 int retval = -EIO;
1442 char *name;
1443 u8 *data;
1444
1445 struct stframe {
1446 u16 addr;
1447 u16 count;
1448 u8 data[0];
1449 } *frame;
1450
1451 switch (signature) {
1452 case 0xa5:
1453 name = "isi608.bin";
1454 break;
1455 case 0xbb:
1456 name = "isi608em.bin";
1457 break;
1458 case 0xcc:
1459 name = "isi616em.bin";
1460 break;
1461 case 0xdd:
1462 name = "isi4608.bin";
1463 break;
1464 case 0xee:
1465 name = "isi4616.bin";
1466 break;
1467 default:
1468 dev_err(&pdev->dev, "Unknown signature.\n");
1469 goto end;
Alan Cox251b8dd2008-04-30 00:54:12 -07001470 }
Jiri Slabye65c1db2006-01-09 20:54:25 -08001471
1472 retval = request_firmware(&fw, name, &pdev->dev);
1473 if (retval)
1474 goto end;
1475
Jiri Slabye4e04082006-09-30 23:27:50 -07001476 retval = -EIO;
1477
Jiri Slabye65c1db2006-01-09 20:54:25 -08001478 for (frame = (struct stframe *)fw->data;
1479 frame < (struct stframe *)(fw->data + fw->size);
Jiri Slabye4e04082006-09-30 23:27:50 -07001480 frame = (struct stframe *)((u8 *)(frame + 1) +
1481 frame->count)) {
Jiri Slabye65c1db2006-01-09 20:54:25 -08001482 if (WaitTillCardIsFree(base))
1483 goto errrelfw;
1484
1485 outw(0xf0, base); /* start upload sequence */
1486 outw(0x00, base);
1487 outw(frame->addr, base); /* lsb of address */
1488
1489 word_count = frame->count / 2 + frame->count % 2;
1490 outw(word_count, base);
1491 InterruptTheCard(base);
1492
1493 udelay(100); /* 0x2f */
1494
1495 if (WaitTillCardIsFree(base))
1496 goto errrelfw;
1497
Alan Cox251b8dd2008-04-30 00:54:12 -07001498 status = inw(base + 0x4);
1499 if (status != 0) {
Jiri Slabye65c1db2006-01-09 20:54:25 -08001500 dev_warn(&pdev->dev, "Card%d rejected load header:\n"
Joe Perchesad361c92009-07-06 13:05:40 -07001501 "Address:0x%x\n"
1502 "Count:0x%x\n"
1503 "Status:0x%x\n",
1504 index + 1, frame->addr, frame->count, status);
Jiri Slabye65c1db2006-01-09 20:54:25 -08001505 goto errrelfw;
1506 }
1507 outsw(base, frame->data, word_count);
1508
1509 InterruptTheCard(base);
1510
1511 udelay(50); /* 0x0f */
1512
1513 if (WaitTillCardIsFree(base))
1514 goto errrelfw;
1515
Alan Cox251b8dd2008-04-30 00:54:12 -07001516 status = inw(base + 0x4);
1517 if (status != 0) {
Jiri Slabye65c1db2006-01-09 20:54:25 -08001518 dev_err(&pdev->dev, "Card%d got out of sync.Card "
1519 "Status:0x%x\n", index + 1, status);
1520 goto errrelfw;
1521 }
Alan Cox251b8dd2008-04-30 00:54:12 -07001522 }
Jiri Slabye65c1db2006-01-09 20:54:25 -08001523
Jiri Slabye65c1db2006-01-09 20:54:25 -08001524/* XXX: should we test it by reading it back and comparing with original like
1525 * in load firmware package? */
Jiri Slabye4e04082006-09-30 23:27:50 -07001526 for (frame = (struct stframe *)fw->data;
1527 frame < (struct stframe *)(fw->data + fw->size);
1528 frame = (struct stframe *)((u8 *)(frame + 1) +
1529 frame->count)) {
Jiri Slabye65c1db2006-01-09 20:54:25 -08001530 if (WaitTillCardIsFree(base))
1531 goto errrelfw;
1532
1533 outw(0xf1, base); /* start download sequence */
1534 outw(0x00, base);
1535 outw(frame->addr, base); /* lsb of address */
1536
1537 word_count = (frame->count >> 1) + frame->count % 2;
1538 outw(word_count + 1, base);
1539 InterruptTheCard(base);
1540
1541 udelay(50); /* 0xf */
1542
1543 if (WaitTillCardIsFree(base))
1544 goto errrelfw;
1545
Alan Cox251b8dd2008-04-30 00:54:12 -07001546 status = inw(base + 0x4);
1547 if (status != 0) {
Jiri Slabye65c1db2006-01-09 20:54:25 -08001548 dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
Joe Perchesad361c92009-07-06 13:05:40 -07001549 "Address:0x%x\n"
1550 "Count:0x%x\n"
1551 "Status: 0x%x\n",
1552 index + 1, frame->addr, frame->count, status);
Jiri Slabye65c1db2006-01-09 20:54:25 -08001553 goto errrelfw;
1554 }
1555
1556 data = kmalloc(word_count * 2, GFP_KERNEL);
Jiri Slabyf0671372006-12-08 02:38:54 -08001557 if (data == NULL) {
1558 dev_err(&pdev->dev, "Card%d, firmware upload "
1559 "failed, not enough memory\n", index + 1);
1560 goto errrelfw;
1561 }
Jiri Slabye65c1db2006-01-09 20:54:25 -08001562 inw(base);
1563 insw(base, data, word_count);
1564 InterruptTheCard(base);
1565
1566 for (a = 0; a < frame->count; a++)
1567 if (data[a] != frame->data[a]) {
1568 kfree(data);
1569 dev_err(&pdev->dev, "Card%d, firmware upload "
1570 "failed\n", index + 1);
1571 goto errrelfw;
1572 }
1573 kfree(data);
1574
1575 udelay(50); /* 0xf */
1576
1577 if (WaitTillCardIsFree(base))
1578 goto errrelfw;
1579
Alan Cox251b8dd2008-04-30 00:54:12 -07001580 status = inw(base + 0x4);
1581 if (status != 0) {
Jiri Slabye65c1db2006-01-09 20:54:25 -08001582 dev_err(&pdev->dev, "Card%d verify got out of sync. "
1583 "Card Status:0x%x\n", index + 1, status);
1584 goto errrelfw;
1585 }
1586 }
1587
Jiri Slabye4e04082006-09-30 23:27:50 -07001588 /* xfer ctrl */
1589 if (WaitTillCardIsFree(base))
1590 goto errrelfw;
1591
1592 outw(0xf2, base);
1593 outw(0x800, base);
1594 outw(0x0, base);
1595 outw(0x0, base);
1596 InterruptTheCard(base);
1597 outw(0x0, base + 0x4); /* for ISI4608 cards */
1598
Jiri Slabye65c1db2006-01-09 20:54:25 -08001599 board->status |= FIRMWARE_LOADED;
1600 retval = 0;
1601
1602errrelfw:
1603 release_firmware(fw);
1604end:
1605 return retval;
1606}
1607
Jiri Slaby9ac09482006-01-09 20:54:24 -08001608/*
1609 * Insmod can set static symbols so keep these static
1610 */
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001611static unsigned int card_count;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001612
1613static int __devinit isicom_probe(struct pci_dev *pdev,
1614 const struct pci_device_id *ent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615{
Jiri Slaby9653a692009-06-17 16:27:48 -07001616 unsigned int uninitialized_var(signature), index;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001617 int retval = -EPERM;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001618 struct isi_board *board = NULL;
1619
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001620 if (card_count >= BOARD_COUNT)
Jiri Slaby9ac09482006-01-09 20:54:24 -08001621 goto err;
1622
Jiri Slabye1e57702008-07-16 21:52:56 +01001623 retval = pci_enable_device(pdev);
1624 if (retval) {
1625 dev_err(&pdev->dev, "failed to enable\n");
1626 goto err;
1627 }
1628
Jiri Slaby9ac09482006-01-09 20:54:24 -08001629 dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1630
1631 /* allot the first empty slot in the array */
1632 for (index = 0; index < BOARD_COUNT; index++)
1633 if (isi_card[index].base == 0) {
1634 board = &isi_card[index];
1635 break;
1636 }
1637
Jiri Slaby938a7022006-12-08 02:38:52 -08001638 board->index = index;
Jiri Slaby4969b3a2007-07-17 04:05:18 -07001639 board->base = pci_resource_start(pdev, 3);
1640 board->irq = pdev->irq;
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001641 card_count++;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001642
1643 pci_set_drvdata(pdev, board);
1644
Jiri Slaby78028da2006-12-08 02:38:53 -08001645 retval = pci_request_region(pdev, 3, ISICOM_NAME);
1646 if (retval) {
Jiri Slaby09a4a112006-12-08 02:38:49 -08001647 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1648 "will be disabled.\n", board->base, board->base + 15,
1649 index + 1);
1650 retval = -EBUSY;
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001651 goto errdec;
Alan Cox251b8dd2008-04-30 00:54:12 -07001652 }
Jiri Slaby9ac09482006-01-09 20:54:24 -08001653
Jiri Slaby09a4a112006-12-08 02:38:49 -08001654 retval = request_irq(board->irq, isicom_interrupt,
1655 IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board);
1656 if (retval < 0) {
1657 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1658 "Card%d will be disabled.\n", board->irq, index + 1);
Jiri Slaby9ac09482006-01-09 20:54:24 -08001659 goto errunrr;
Jiri Slaby09a4a112006-12-08 02:38:49 -08001660 }
Jiri Slaby9ac09482006-01-09 20:54:24 -08001661
1662 retval = reset_card(pdev, index, &signature);
1663 if (retval < 0)
1664 goto errunri;
1665
Jiri Slabye65c1db2006-01-09 20:54:25 -08001666 retval = load_firmware(pdev, index, signature);
1667 if (retval < 0)
1668 goto errunri;
1669
Jiri Slaby938a7022006-12-08 02:38:52 -08001670 for (index = 0; index < board->port_count; index++)
1671 tty_register_device(isicom_normal, board->index * 16 + index,
1672 &pdev->dev);
1673
Jiri Slaby9ac09482006-01-09 20:54:24 -08001674 return 0;
1675
1676errunri:
1677 free_irq(board->irq, board);
1678errunrr:
Jiri Slaby78028da2006-12-08 02:38:53 -08001679 pci_release_region(pdev, 3);
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001680errdec:
Jiri Slaby9ac09482006-01-09 20:54:24 -08001681 board->base = 0;
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001682 card_count--;
Jiri Slabye1e57702008-07-16 21:52:56 +01001683 pci_disable_device(pdev);
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001684err:
Jiri Slaby9ac09482006-01-09 20:54:24 -08001685 return retval;
1686}
1687
1688static void __devexit isicom_remove(struct pci_dev *pdev)
1689{
1690 struct isi_board *board = pci_get_drvdata(pdev);
Jiri Slaby938a7022006-12-08 02:38:52 -08001691 unsigned int i;
1692
1693 for (i = 0; i < board->port_count; i++)
1694 tty_unregister_device(isicom_normal, board->index * 16 + i);
Jiri Slaby9ac09482006-01-09 20:54:24 -08001695
1696 free_irq(board->irq, board);
Jiri Slaby78028da2006-12-08 02:38:53 -08001697 pci_release_region(pdev, 3);
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001698 board->base = 0;
1699 card_count--;
Jiri Slabye1e57702008-07-16 21:52:56 +01001700 pci_disable_device(pdev);
Jiri Slaby9ac09482006-01-09 20:54:24 -08001701}
1702
Jiri Slabyca262002006-12-08 02:38:50 -08001703static int __init isicom_init(void)
Jiri Slaby9ac09482006-01-09 20:54:24 -08001704{
1705 int retval, idx, channel;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001706 struct isi_port *port;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001707
Alan Cox251b8dd2008-04-30 00:54:12 -07001708 for (idx = 0; idx < BOARD_COUNT; idx++) {
Jiri Slaby9ac09482006-01-09 20:54:24 -08001709 port = &isi_ports[idx * 16];
1710 isi_card[idx].ports = port;
1711 spin_lock_init(&isi_card[idx].card_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001712 for (channel = 0; channel < 16; channel++, port++) {
Alan Cox44b7d1b2008-07-16 21:57:18 +01001713 tty_port_init(&port->port);
Alan Cox31f35932009-01-02 13:45:05 +00001714 port->port.ops = &isicom_port_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715 port->magic = ISICOM_MAGIC;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001716 port->card = &isi_card[idx];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001717 port->channel = channel;
Alan Cox44b7d1b2008-07-16 21:57:18 +01001718 port->port.close_delay = 50 * HZ/100;
1719 port->port.closing_wait = 3000 * HZ/100;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001720 port->status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721 /* . . . */
Alan Cox251b8dd2008-04-30 00:54:12 -07001722 }
Jiri Slaby9ac09482006-01-09 20:54:24 -08001723 isi_card[idx].base = 0;
1724 isi_card[idx].irq = 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001725 }
1726
Jiri Slaby09a4a112006-12-08 02:38:49 -08001727 /* tty driver structure initialization */
1728 isicom_normal = alloc_tty_driver(PORT_COUNT);
1729 if (!isicom_normal) {
1730 retval = -ENOMEM;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001731 goto error;
Jiri Slaby09a4a112006-12-08 02:38:49 -08001732 }
1733
1734 isicom_normal->owner = THIS_MODULE;
1735 isicom_normal->name = "ttyM";
1736 isicom_normal->major = ISICOM_NMAJOR;
1737 isicom_normal->minor_start = 0;
1738 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1739 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1740 isicom_normal->init_termios = tty_std_termios;
1741 isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
1742 CLOCAL;
Jiri Slaby938a7022006-12-08 02:38:52 -08001743 isicom_normal->flags = TTY_DRIVER_REAL_RAW |
Alan Cox6d889722008-07-22 11:18:21 +01001744 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
Jiri Slaby09a4a112006-12-08 02:38:49 -08001745 tty_set_operations(isicom_normal, &isicom_ops);
1746
1747 retval = tty_register_driver(isicom_normal);
1748 if (retval) {
1749 pr_dbg("Couldn't register the dialin driver\n");
1750 goto err_puttty;
1751 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001752
Jiri Slaby9ac09482006-01-09 20:54:24 -08001753 retval = pci_register_driver(&isicom_driver);
1754 if (retval < 0) {
1755 printk(KERN_ERR "ISICOM: Unable to register pci driver.\n");
Jiri Slaby09a4a112006-12-08 02:38:49 -08001756 goto err_unrtty;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001757 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001758
Jiri Slaby34b55b82006-12-08 02:38:55 -08001759 mod_timer(&tx, jiffies + 1);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001760
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761 return 0;
Jiri Slaby09a4a112006-12-08 02:38:49 -08001762err_unrtty:
1763 tty_unregister_driver(isicom_normal);
1764err_puttty:
1765 put_tty_driver(isicom_normal);
Jiri Slaby9ac09482006-01-09 20:54:24 -08001766error:
1767 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001768}
1769
1770static void __exit isicom_exit(void)
1771{
Jiri Slabye3273252007-07-17 04:05:18 -07001772 del_timer_sync(&tx);
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001773
Jiri Slaby9ac09482006-01-09 20:54:24 -08001774 pci_unregister_driver(&isicom_driver);
Jiri Slaby09a4a112006-12-08 02:38:49 -08001775 tty_unregister_driver(isicom_normal);
1776 put_tty_driver(isicom_normal);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777}
1778
Jiri Slabyca262002006-12-08 02:38:50 -08001779module_init(isicom_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780module_exit(isicom_exit);
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001781
1782MODULE_AUTHOR("MultiTech");
1783MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1784MODULE_LICENSE("GPL");