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Linux 2.6.21.1
[linux/fpc-iii.git] / drivers / char / isicom.c
blob43ab9edc76f540ce254f07f827e00414bd70abc2
1 /*
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.
23 * This is to prevent the firmware
24 * 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
34 * when the last port on the card is
35 * closed.
36 *
37 * 10/5/00 sameer Signal mask setup command added
38 * to isicom_setup_port and
39 * isicom_shutdown_port.
40 *
41 * 24/5/00 sameer The driver is now SMP aware.
42 *
43 *
44 * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem
45 *
46 *
47 * 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 *
53 * 11/04/01 Kevin Fixed firmware load problem with
54 * ISIHP-4X card
55 *
56 * 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
65 * info during insmod as well as module
66 * listing by lsmod.
67 *
68 * 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.
76 *
77 * 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 *
82 * 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
89 * 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 *
96 * To use this driver you also need the support package. You
97 * can find this in RPM format on
98 * ftp://ftp.linux.org.uk/pub/linux/alan
99 *
100 * 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
110 * Merge testing
111 * 64-bit verification
112 */
113
114 #include <linux/module.h>
115 #include <linux/firmware.h>
116 #include <linux/kernel.h>
117 #include <linux/tty.h>
118 #include <linux/tty_flip.h>
119 #include <linux/termios.h>
120 #include <linux/fs.h>
121 #include <linux/sched.h>
122 #include <linux/serial.h>
123 #include <linux/mm.h>
124 #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
137 #define InterruptTheCard(base) outw(0, (base) + 0xc)
138 #define ClearInterrupt(base) inw((base) + 0x0a)
139
140 #ifdef DEBUG
141 #define pr_dbg(str...) printk(KERN_DEBUG "ISICOM: " str)
142 #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
143 #else
144 #define pr_dbg(str...) do { } while (0)
145 #define isicom_paranoia_check(a, b, c) 0
146 #endif
147
148 static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
149 static void __devexit isicom_remove(struct pci_dev *);
150
151 static struct pci_device_id isicom_pci_tbl[] = {
152 { PCI_DEVICE(VENDOR_ID, 0x2028) },
153 { PCI_DEVICE(VENDOR_ID, 0x2051) },
154 { PCI_DEVICE(VENDOR_ID, 0x2052) },
155 { PCI_DEVICE(VENDOR_ID, 0x2053) },
156 { PCI_DEVICE(VENDOR_ID, 0x2054) },
157 { PCI_DEVICE(VENDOR_ID, 0x2055) },
158 { PCI_DEVICE(VENDOR_ID, 0x2056) },
159 { PCI_DEVICE(VENDOR_ID, 0x2057) },
160 { PCI_DEVICE(VENDOR_ID, 0x2058) },
161 { 0 }
162 };
163 MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
164
165 static struct pci_driver isicom_driver = {
166 .name = "isicom",
167 .id_table = isicom_pci_tbl,
168 .probe = isicom_probe,
169 .remove = __devexit_p(isicom_remove)
170 };
171
172 static int prev_card = 3; /* start servicing isi_card[0] */
173 static struct tty_driver *isicom_normal;
174
175 static DECLARE_COMPLETION(isi_timerdone);
176 static char re_schedule = 1;
177
178 static void isicom_tx(unsigned long _data);
179 static void isicom_start(struct tty_struct *tty);
180
181 static DEFINE_TIMER(tx, isicom_tx, 0, 0);
182
183 /* baud index mappings from linux defns to isi */
184
185 static signed char linuxb_to_isib[] = {
186 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
187 };
188
189 struct isi_board {
190 unsigned long base;
191 unsigned char irq;
192 unsigned char port_count;
193 unsigned short status;
194 unsigned short port_status; /* each bit for each port */
195 unsigned short shift_count;
196 struct isi_port * ports;
197 signed char count;
198 spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
199 unsigned long flags;
200 unsigned int index;
201 };
202
203 struct isi_port {
204 unsigned short magic;
205 unsigned int flags;
206 int count;
207 int blocked_open;
208 int close_delay;
209 u16 channel;
210 u16 status;
211 u16 closing_wait;
212 struct isi_board * card;
213 struct tty_struct * tty;
214 wait_queue_head_t close_wait;
215 wait_queue_head_t open_wait;
216 unsigned char * xmit_buf;
217 int xmit_head;
218 int xmit_tail;
219 int xmit_cnt;
220 };
221
222 static struct isi_board isi_card[BOARD_COUNT];
223 static struct isi_port isi_ports[PORT_COUNT];
224
225 /*
226 * Locking functions for card level locking. We need to own both
227 * the kernel lock for the card and have the card in a position that
228 * it wants to talk.
229 */
230
231 static inline int WaitTillCardIsFree(u16 base)
232 {
233 unsigned int count = 0;
234 unsigned int a = in_atomic(); /* do we run under spinlock? */
235
236 while (!(inw(base + 0xe) & 0x1) && count++ < 100)
237 if (a)
238 mdelay(1);
239 else
240 msleep(1);
241
242 return !(inw(base + 0xe) & 0x1);
243 }
244
245 static int lock_card(struct isi_board *card)
246 {
247 char retries;
248 unsigned long base = card->base;
249
250 for (retries = 0; retries < 100; retries++) {
251 spin_lock_irqsave(&card->card_lock, card->flags);
252 if (inw(base + 0xe) & 0x1) {
253 return 1;
254 } else {
255 spin_unlock_irqrestore(&card->card_lock, card->flags);
256 udelay(1000); /* 1ms */
257 }
258 }
259 printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n",
260 card->base);
261
262 return 0; /* Failed to acquire the card! */
263 }
264
265 static int lock_card_at_interrupt(struct isi_board *card)
266 {
267 unsigned char retries;
268 unsigned long base = card->base;
269
270 for (retries = 0; retries < 200; retries++) {
271 spin_lock_irqsave(&card->card_lock, card->flags);
272
273 if (inw(base + 0xe) & 0x1)
274 return 1;
275 else
276 spin_unlock_irqrestore(&card->card_lock, card->flags);
277 }
278 /* Failing in interrupt is an acceptable event */
279 return 0; /* Failed to acquire the card! */
280 }
281
282 static void unlock_card(struct isi_board *card)
283 {
284 spin_unlock_irqrestore(&card->card_lock, card->flags);
285 }
286
287 /*
288 * ISI Card specific ops ...
289 */
290
291 /* card->lock HAS to be held */
292 static void raise_dtr(struct isi_port *port)
293 {
294 struct isi_board *card = port->card;
295 unsigned long base = card->base;
296 u16 channel = port->channel;
297
298 if (WaitTillCardIsFree(base))
299 return;
300
301 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
302 outw(0x0504, base);
303 InterruptTheCard(base);
304 port->status |= ISI_DTR;
305 }
306
307 /* card->lock HAS to be held */
308 static inline void drop_dtr(struct isi_port *port)
309 {
310 struct isi_board *card = port->card;
311 unsigned long base = card->base;
312 u16 channel = port->channel;
313
314 if (WaitTillCardIsFree(base))
315 return;
316
317 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
318 outw(0x0404, base);
319 InterruptTheCard(base);
320 port->status &= ~ISI_DTR;
321 }
322
323 /* card->lock HAS to be held */
324 static inline void raise_rts(struct isi_port *port)
325 {
326 struct isi_board *card = port->card;
327 unsigned long base = card->base;
328 u16 channel = port->channel;
329
330 if (WaitTillCardIsFree(base))
331 return;
332
333 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
334 outw(0x0a04, base);
335 InterruptTheCard(base);
336 port->status |= ISI_RTS;
337 }
338
339 /* card->lock HAS to be held */
340 static inline void drop_rts(struct isi_port *port)
341 {
342 struct isi_board *card = port->card;
343 unsigned long base = card->base;
344 u16 channel = port->channel;
345
346 if (WaitTillCardIsFree(base))
347 return;
348
349 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
350 outw(0x0804, base);
351 InterruptTheCard(base);
352 port->status &= ~ISI_RTS;
353 }
354
355 /* card->lock MUST NOT be held */
356 static inline void raise_dtr_rts(struct isi_port *port)
357 {
358 struct isi_board *card = port->card;
359 unsigned long base = card->base;
360 u16 channel = port->channel;
361
362 if (!lock_card(card))
363 return;
364
365 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
366 outw(0x0f04, base);
367 InterruptTheCard(base);
368 port->status |= (ISI_DTR | ISI_RTS);
369 unlock_card(card);
370 }
371
372 /* card->lock HAS to be held */
373 static void drop_dtr_rts(struct isi_port *port)
374 {
375 struct isi_board *card = port->card;
376 unsigned long base = card->base;
377 u16 channel = port->channel;
378
379 if (WaitTillCardIsFree(base))
380 return;
381
382 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
383 outw(0x0c04, base);
384 InterruptTheCard(base);
385 port->status &= ~(ISI_RTS | ISI_DTR);
386 }
387
388 /*
389 * ISICOM Driver specific routines ...
390 *
391 */
392
393 static inline int __isicom_paranoia_check(struct isi_port const *port,
394 char *name, const char *routine)
395 {
396 if (!port) {
397 printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for "
398 "dev %s in %s.\n", name, routine);
399 return 1;
400 }
401 if (port->magic != ISICOM_MAGIC) {
402 printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for "
403 "dev %s in %s.\n", name, routine);
404 return 1;
405 }
406
407 return 0;
408 }
409
410 /*
411 * Transmitter.
412 *
413 * We shovel data into the card buffers on a regular basis. The card
414 * will do the rest of the work for us.
415 */
416
417 static void isicom_tx(unsigned long _data)
418 {
419 short count = (BOARD_COUNT-1), card, base;
420 short txcount, wrd, residue, word_count, cnt;
421 struct isi_port *port;
422 struct tty_struct *tty;
423
424 /* find next active board */
425 card = (prev_card + 1) & 0x0003;
426 while(count-- > 0) {
427 if (isi_card[card].status & BOARD_ACTIVE)
428 break;
429 card = (card + 1) & 0x0003;
430 }
431 if (!(isi_card[card].status & BOARD_ACTIVE))
432 goto sched_again;
433
434 prev_card = card;
435
436 count = isi_card[card].port_count;
437 port = isi_card[card].ports;
438 base = isi_card[card].base;
439 for (;count > 0;count--, port++) {
440 if (!lock_card_at_interrupt(&isi_card[card]))
441 continue;
442 /* port not active or tx disabled to force flow control */
443 if (!(port->flags & ASYNC_INITIALIZED) ||
444 !(port->status & ISI_TXOK))
445 unlock_card(&isi_card[card]);
446 continue;
447
448 tty = port->tty;
449
450
451 if (tty == NULL) {
452 unlock_card(&isi_card[card]);
453 continue;
454 }
455
456 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
457 if (txcount <= 0 || tty->stopped || tty->hw_stopped) {
458 unlock_card(&isi_card[card]);
459 continue;
460 }
461 if (!(inw(base + 0x02) & (1 << port->channel))) {
462 unlock_card(&isi_card[card]);
463 continue;
464 }
465 pr_dbg("txing %d bytes, port%d.\n", txcount,
466 port->channel + 1);
467 outw((port->channel << isi_card[card].shift_count) | txcount,
468 base);
469 residue = NO;
470 wrd = 0;
471 while (1) {
472 cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
473 - port->xmit_tail));
474 if (residue == YES) {
475 residue = NO;
476 if (cnt > 0) {
477 wrd |= (port->xmit_buf[port->xmit_tail]
478 << 8);
479 port->xmit_tail = (port->xmit_tail + 1)
480 & (SERIAL_XMIT_SIZE - 1);
481 port->xmit_cnt--;
482 txcount--;
483 cnt--;
484 outw(wrd, base);
485 } else {
486 outw(wrd, base);
487 break;
488 }
489 }
490 if (cnt <= 0) break;
491 word_count = cnt >> 1;
492 outsw(base, port->xmit_buf+port->xmit_tail,word_count);
493 port->xmit_tail = (port->xmit_tail
494 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
495 txcount -= (word_count << 1);
496 port->xmit_cnt -= (word_count << 1);
497 if (cnt & 0x0001) {
498 residue = YES;
499 wrd = port->xmit_buf[port->xmit_tail];
500 port->xmit_tail = (port->xmit_tail + 1)
501 & (SERIAL_XMIT_SIZE - 1);
502 port->xmit_cnt--;
503 txcount--;
504 }
505 }
506
507 InterruptTheCard(base);
508 if (port->xmit_cnt <= 0)
509 port->status &= ~ISI_TXOK;
510 if (port->xmit_cnt <= WAKEUP_CHARS)
511 tty_wakeup(tty);
512 unlock_card(&isi_card[card]);
513 }
514
515 /* schedule another tx for hopefully in about 10ms */
516 sched_again:
517 if (!re_schedule) {
518 complete(&isi_timerdone);
519 return;
520 }
521
522 mod_timer(&tx, jiffies + msecs_to_jiffies(10));
523 }
524
525 /*
526 * Main interrupt handler routine
527 */
528
529 static irqreturn_t isicom_interrupt(int irq, void *dev_id)
530 {
531 struct isi_board *card = dev_id;
532 struct isi_port *port;
533 struct tty_struct *tty;
534 unsigned long base;
535 u16 header, word_count, count, channel;
536 short byte_count;
537 unsigned char *rp;
538
539 if (!card || !(card->status & FIRMWARE_LOADED))
540 return IRQ_NONE;
541
542 base = card->base;
543
544 /* did the card interrupt us? */
545 if (!(inw(base + 0x0e) & 0x02))
546 return IRQ_NONE;
547
548 spin_lock(&card->card_lock);
549
550 /*
551 * disable any interrupts from the PCI card and lower the
552 * interrupt line
553 */
554 outw(0x8000, base+0x04);
555 ClearInterrupt(base);
556
557 inw(base); /* get the dummy word out */
558 header = inw(base);
559 channel = (header & 0x7800) >> card->shift_count;
560 byte_count = header & 0xff;
561
562 if (channel + 1 > card->port_count) {
563 printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): "
564 "%d(channel) > port_count.\n", base, channel+1);
565 outw(0x0000, base+0x04); /* enable interrupts */
566 spin_unlock(&card->card_lock);
567 return IRQ_HANDLED;
568 }
569 port = card->ports + channel;
570 if (!(port->flags & ASYNC_INITIALIZED)) {
571 outw(0x0000, base+0x04); /* enable interrupts */
572 spin_unlock(&card->card_lock);
573 return IRQ_HANDLED;
574 }
575
576 tty = port->tty;
577 if (tty == NULL) {
578 word_count = byte_count >> 1;
579 while(byte_count > 1) {
580 inw(base);
581 byte_count -= 2;
582 }
583 if (byte_count & 0x01)
584 inw(base);
585 outw(0x0000, base+0x04); /* enable interrupts */
586 spin_unlock(&card->card_lock);
587 return IRQ_HANDLED;
588 }
589
590 if (header & 0x8000) { /* Status Packet */
591 header = inw(base);
592 switch(header & 0xff) {
593 case 0: /* Change in EIA signals */
594 if (port->flags & ASYNC_CHECK_CD) {
595 if (port->status & ISI_DCD) {
596 if (!(header & ISI_DCD)) {
597 /* Carrier has been lost */
598 pr_dbg("interrupt: DCD->low.\n"
599 );
600 port->status &= ~ISI_DCD;
601 tty_hangup(tty);
602 }
603 } else if (header & ISI_DCD) {
604 /* Carrier has been detected */
605 pr_dbg("interrupt: DCD->high.\n");
606 port->status |= ISI_DCD;
607 wake_up_interruptible(&port->open_wait);
608 }
609 } else {
610 if (header & ISI_DCD)
611 port->status |= ISI_DCD;
612 else
613 port->status &= ~ISI_DCD;
614 }
615
616 if (port->flags & ASYNC_CTS_FLOW) {
617 if (port->tty->hw_stopped) {
618 if (header & ISI_CTS) {
619 port->tty->hw_stopped = 0;
620 /* start tx ing */
621 port->status |= (ISI_TXOK
622 | ISI_CTS);
623 tty_wakeup(tty);
624 }
625 } else if (!(header & ISI_CTS)) {
626 port->tty->hw_stopped = 1;
627 /* stop tx ing */
628 port->status &= ~(ISI_TXOK | ISI_CTS);
629 }
630 } else {
631 if (header & ISI_CTS)
632 port->status |= ISI_CTS;
633 else
634 port->status &= ~ISI_CTS;
635 }
636
637 if (header & ISI_DSR)
638 port->status |= ISI_DSR;
639 else
640 port->status &= ~ISI_DSR;
641
642 if (header & ISI_RI)
643 port->status |= ISI_RI;
644 else
645 port->status &= ~ISI_RI;
646
647 break;
648
649 case 1: /* Received Break !!! */
650 tty_insert_flip_char(tty, 0, TTY_BREAK);
651 if (port->flags & ASYNC_SAK)
652 do_SAK(tty);
653 tty_flip_buffer_push(tty);
654 break;
655
656 case 2: /* Statistics */
657 pr_dbg("isicom_interrupt: stats!!!.\n");
658 break;
659
660 default:
661 pr_dbg("Intr: Unknown code in status packet.\n");
662 break;
663 }
664 } else { /* Data Packet */
665
666 count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
667 pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count);
668 word_count = count >> 1;
669 insw(base, rp, word_count);
670 byte_count -= (word_count << 1);
671 if (count & 0x0001) {
672 tty_insert_flip_char(tty, inw(base) & 0xff,
673 TTY_NORMAL);
674 byte_count -= 2;
675 }
676 if (byte_count > 0) {
677 pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping "
678 "bytes...\n", base, channel + 1);
679 while(byte_count > 0) { /* drain out unread xtra data */
680 inw(base);
681 byte_count -= 2;
682 }
683 }
684 tty_flip_buffer_push(tty);
685 }
686 outw(0x0000, base+0x04); /* enable interrupts */
687 spin_unlock(&card->card_lock);
688
689 return IRQ_HANDLED;
690 }
691
692 static void isicom_config_port(struct isi_port *port)
693 {
694 struct isi_board *card = port->card;
695 struct tty_struct *tty;
696 unsigned long baud;
697 unsigned long base = card->base;
698 u16 channel_setup, channel = port->channel,
699 shift_count = card->shift_count;
700 unsigned char flow_ctrl;
701
702 if (!(tty = port->tty) || !tty->termios)
703 return;
704 baud = C_BAUD(tty);
705 if (baud & CBAUDEX) {
706 baud &= ~CBAUDEX;
707
708 /* if CBAUDEX bit is on and the baud is set to either 50 or 75
709 * then the card is programmed for 57.6Kbps or 115Kbps
710 * respectively.
711 */
712
713 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
714 if (baud < 1 || baud > 4)
715 port->tty->termios->c_cflag &= ~CBAUDEX;
716 else
717 baud += 15;
718 }
719 if (baud == 15) {
720
721 /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
722 * by the set_serial_info ioctl ... this is done by
723 * the 'setserial' utility.
724 */
725
726 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
727 baud++; /* 57.6 Kbps */
728 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
729 baud +=2; /* 115 Kbps */
730 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
731 baud += 3; /* 230 kbps*/
732 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
733 baud += 4; /* 460 kbps*/
734 }
735 if (linuxb_to_isib[baud] == -1) {
736 /* hang up */
737 drop_dtr(port);
738 return;
739 }
740 else
741 raise_dtr(port);
742
743 if (WaitTillCardIsFree(base) == 0) {
744 outw(0x8000 | (channel << shift_count) |0x03, base);
745 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
746 channel_setup = 0;
747 switch(C_CSIZE(tty)) {
748 case CS5:
749 channel_setup |= ISICOM_CS5;
750 break;
751 case CS6:
752 channel_setup |= ISICOM_CS6;
753 break;
754 case CS7:
755 channel_setup |= ISICOM_CS7;
756 break;
757 case CS8:
758 channel_setup |= ISICOM_CS8;
759 break;
760 }
761
762 if (C_CSTOPB(tty))
763 channel_setup |= ISICOM_2SB;
764 if (C_PARENB(tty)) {
765 channel_setup |= ISICOM_EVPAR;
766 if (C_PARODD(tty))
767 channel_setup |= ISICOM_ODPAR;
768 }
769 outw(channel_setup, base);
770 InterruptTheCard(base);
771 }
772 if (C_CLOCAL(tty))
773 port->flags &= ~ASYNC_CHECK_CD;
774 else
775 port->flags |= ASYNC_CHECK_CD;
776
777 /* flow control settings ...*/
778 flow_ctrl = 0;
779 port->flags &= ~ASYNC_CTS_FLOW;
780 if (C_CRTSCTS(tty)) {
781 port->flags |= ASYNC_CTS_FLOW;
782 flow_ctrl |= ISICOM_CTSRTS;
783 }
784 if (I_IXON(tty))
785 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
786 if (I_IXOFF(tty))
787 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
788
789 if (WaitTillCardIsFree(base) == 0) {
790 outw(0x8000 | (channel << shift_count) |0x04, base);
791 outw(flow_ctrl << 8 | 0x05, base);
792 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
793 InterruptTheCard(base);
794 }
795
796 /* rx enabled -> enable port for rx on the card */
797 if (C_CREAD(tty)) {
798 card->port_status |= (1 << channel);
799 outw(card->port_status, base + 0x02);
800 }
801 }
802
803 /* open et all */
804
805 static inline void isicom_setup_board(struct isi_board *bp)
806 {
807 int channel;
808 struct isi_port *port;
809 unsigned long flags;
810
811 spin_lock_irqsave(&bp->card_lock, flags);
812 if (bp->status & BOARD_ACTIVE) {
813 spin_unlock_irqrestore(&bp->card_lock, flags);
814 return;
815 }
816 port = bp->ports;
817 bp->status |= BOARD_ACTIVE;
818 for (channel = 0; channel < bp->port_count; channel++, port++)
819 drop_dtr_rts(port);
820 spin_unlock_irqrestore(&bp->card_lock, flags);
821 }
822
823 static int isicom_setup_port(struct isi_port *port)
824 {
825 struct isi_board *card = port->card;
826 unsigned long flags;
827
828 if (port->flags & ASYNC_INITIALIZED) {
829 return 0;
830 }
831 if (!port->xmit_buf) {
832 unsigned long page;
833
834 if (!(page = get_zeroed_page(GFP_KERNEL)))
835 return -ENOMEM;
836
837 if (port->xmit_buf) {
838 free_page(page);
839 return -ERESTARTSYS;
840 }
841 port->xmit_buf = (unsigned char *) page;
842 }
843
844 spin_lock_irqsave(&card->card_lock, flags);
845 if (port->tty)
846 clear_bit(TTY_IO_ERROR, &port->tty->flags);
847 if (port->count == 1)
848 card->count++;
849
850 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
851
852 /* discard any residual data */
853 if (WaitTillCardIsFree(card->base) == 0) {
854 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
855 card->base);
856 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
857 InterruptTheCard(card->base);
858 }
859
860 isicom_config_port(port);
861 port->flags |= ASYNC_INITIALIZED;
862 spin_unlock_irqrestore(&card->card_lock, flags);
863
864 return 0;
865 }
866
867 static int block_til_ready(struct tty_struct *tty, struct file *filp,
868 struct isi_port *port)
869 {
870 struct isi_board *card = port->card;
871 int do_clocal = 0, retval;
872 unsigned long flags;
873 DECLARE_WAITQUEUE(wait, current);
874
875 /* block if port is in the process of being closed */
876
877 if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
878 pr_dbg("block_til_ready: close in progress.\n");
879 interruptible_sleep_on(&port->close_wait);
880 if (port->flags & ASYNC_HUP_NOTIFY)
881 return -EAGAIN;
882 else
883 return -ERESTARTSYS;
884 }
885
886 /* if non-blocking mode is set ... */
887
888 if ((filp->f_flags & O_NONBLOCK) ||
889 (tty->flags & (1 << TTY_IO_ERROR))) {
890 pr_dbg("block_til_ready: non-block mode.\n");
891 port->flags |= ASYNC_NORMAL_ACTIVE;
892 return 0;
893 }
894
895 if (C_CLOCAL(tty))
896 do_clocal = 1;
897
898 /* block waiting for DCD to be asserted, and while
899 callout dev is busy */
900 retval = 0;
901 add_wait_queue(&port->open_wait, &wait);
902
903 spin_lock_irqsave(&card->card_lock, flags);
904 if (!tty_hung_up_p(filp))
905 port->count--;
906 port->blocked_open++;
907 spin_unlock_irqrestore(&card->card_lock, flags);
908
909 while (1) {
910 raise_dtr_rts(port);
911
912 set_current_state(TASK_INTERRUPTIBLE);
913 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
914 if (port->flags & ASYNC_HUP_NOTIFY)
915 retval = -EAGAIN;
916 else
917 retval = -ERESTARTSYS;
918 break;
919 }
920 if (!(port->flags & ASYNC_CLOSING) &&
921 (do_clocal || (port->status & ISI_DCD))) {
922 break;
923 }
924 if (signal_pending(current)) {
925 retval = -ERESTARTSYS;
926 break;
927 }
928 schedule();
929 }
930 set_current_state(TASK_RUNNING);
931 remove_wait_queue(&port->open_wait, &wait);
932 spin_lock_irqsave(&card->card_lock, flags);
933 if (!tty_hung_up_p(filp))
934 port->count++;
935 port->blocked_open--;
936 spin_unlock_irqrestore(&card->card_lock, flags);
937 if (retval)
938 return retval;
939 port->flags |= ASYNC_NORMAL_ACTIVE;
940 return 0;
941 }
942
943 static int isicom_open(struct tty_struct *tty, struct file *filp)
944 {
945 struct isi_port *port;
946 struct isi_board *card;
947 unsigned int board;
948 int error, line;
949
950 line = tty->index;
951 if (line < 0 || line > PORT_COUNT-1)
952 return -ENODEV;
953 board = BOARD(line);
954 card = &isi_card[board];
955
956 if (!(card->status & FIRMWARE_LOADED))
957 return -ENODEV;
958
959 /* open on a port greater than the port count for the card !!! */
960 if (line > ((board * 16) + card->port_count - 1))
961 return -ENODEV;
962
963 port = &isi_ports[line];
964 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
965 return -ENODEV;
966
967 isicom_setup_board(card);
968
969 port->count++;
970 tty->driver_data = port;
971 port->tty = tty;
972 if ((error = isicom_setup_port(port))!=0)
973 return error;
974 if ((error = block_til_ready(tty, filp, port))!=0)
975 return error;
976
977 return 0;
978 }
979
980 /* close et all */
981
982 static inline void isicom_shutdown_board(struct isi_board *bp)
983 {
984 if (bp->status & BOARD_ACTIVE) {
985 bp->status &= ~BOARD_ACTIVE;
986 }
987 }
988
989 /* card->lock HAS to be held */
990 static void isicom_shutdown_port(struct isi_port *port)
991 {
992 struct isi_board *card = port->card;
993 struct tty_struct *tty;
994
995 tty = port->tty;
996
997 if (!(port->flags & ASYNC_INITIALIZED))
998 return;
999
1000 if (port->xmit_buf) {
1001 free_page((unsigned long) port->xmit_buf);
1002 port->xmit_buf = NULL;
1003 }
1004 port->flags &= ~ASYNC_INITIALIZED;
1005 /* 3rd October 2000 : Vinayak P Risbud */
1006 port->tty = NULL;
1007
1008 /*Fix done by Anil .S on 30-04-2001
1009 remote login through isi port has dtr toggle problem
1010 due to which the carrier drops before the password prompt
1011 appears on the remote end. Now we drop the dtr only if the
1012 HUPCL(Hangup on close) flag is set for the tty*/
1013
1014 if (C_HUPCL(tty))
1015 /* drop dtr on this port */
1016 drop_dtr(port);
1017
1018 /* any other port uninits */
1019 if (tty)
1020 set_bit(TTY_IO_ERROR, &tty->flags);
1021
1022 if (--card->count < 0) {
1023 pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n",
1024 card->base, card->count);
1025 card->count = 0;
1026 }
1027
1028 /* last port was closed, shutdown that boad too */
1029 if (C_HUPCL(tty)) {
1030 if (!card->count)
1031 isicom_shutdown_board(card);
1032 }
1033 }
1034
1035 static void isicom_close(struct tty_struct *tty, struct file *filp)
1036 {
1037 struct isi_port *port = tty->driver_data;
1038 struct isi_board *card;
1039 unsigned long flags;
1040
1041 if (!port)
1042 return;
1043 card = port->card;
1044 if (isicom_paranoia_check(port, tty->name, "isicom_close"))
1045 return;
1046
1047 pr_dbg("Close start!!!.\n");
1048
1049 spin_lock_irqsave(&card->card_lock, flags);
1050 if (tty_hung_up_p(filp)) {
1051 spin_unlock_irqrestore(&card->card_lock, flags);
1052 return;
1053 }
1054
1055 if (tty->count == 1 && port->count != 1) {
1056 printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
1057 "count tty->count = 1 port count = %d.\n",
1058 card->base, port->count);
1059 port->count = 1;
1060 }
1061 if (--port->count < 0) {
1062 printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
1063 "count for channel%d = %d", card->base, port->channel,
1064 port->count);
1065 port->count = 0;
1066 }
1067
1068 if (port->count) {
1069 spin_unlock_irqrestore(&card->card_lock, flags);
1070 return;
1071 }
1072 port->flags |= ASYNC_CLOSING;
1073 tty->closing = 1;
1074 spin_unlock_irqrestore(&card->card_lock, flags);
1075
1076 if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1077 tty_wait_until_sent(tty, port->closing_wait);
1078 /* indicate to the card that no more data can be received
1079 on this port */
1080 spin_lock_irqsave(&card->card_lock, flags);
1081 if (port->flags & ASYNC_INITIALIZED) {
1082 card->port_status &= ~(1 << port->channel);
1083 outw(card->port_status, card->base + 0x02);
1084 }
1085 isicom_shutdown_port(port);
1086 spin_unlock_irqrestore(&card->card_lock, flags);
1087
1088 if (tty->driver->flush_buffer)
1089 tty->driver->flush_buffer(tty);
1090 tty_ldisc_flush(tty);
1091
1092 spin_lock_irqsave(&card->card_lock, flags);
1093 tty->closing = 0;
1094
1095 if (port->blocked_open) {
1096 spin_unlock_irqrestore(&card->card_lock, flags);
1097 if (port->close_delay) {
1098 pr_dbg("scheduling until time out.\n");
1099 msleep_interruptible(
1100 jiffies_to_msecs(port->close_delay));
1101 }
1102 spin_lock_irqsave(&card->card_lock, flags);
1103 wake_up_interruptible(&port->open_wait);
1104 }
1105 port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1106 wake_up_interruptible(&port->close_wait);
1107 spin_unlock_irqrestore(&card->card_lock, flags);
1108 }
1109
1110 /* write et all */
1111 static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
1112 int count)
1113 {
1114 struct isi_port *port = tty->driver_data;
1115 struct isi_board *card = port->card;
1116 unsigned long flags;
1117 int cnt, total = 0;
1118
1119 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
1120 return 0;
1121
1122 if (!port->xmit_buf)
1123 return 0;
1124
1125 spin_lock_irqsave(&card->card_lock, flags);
1126
1127 while(1) {
1128 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
1129 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
1130 if (cnt <= 0)
1131 break;
1132
1133 memcpy(port->xmit_buf + port->xmit_head, buf, cnt);
1134 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
1135 - 1);
1136 port->xmit_cnt += cnt;
1137 buf += cnt;
1138 count -= cnt;
1139 total += cnt;
1140 }
1141 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
1142 port->status |= ISI_TXOK;
1143 spin_unlock_irqrestore(&card->card_lock, flags);
1144 return total;
1145 }
1146
1147 /* put_char et all */
1148 static void isicom_put_char(struct tty_struct *tty, unsigned char ch)
1149 {
1150 struct isi_port *port = tty->driver_data;
1151 struct isi_board *card = port->card;
1152 unsigned long flags;
1153
1154 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
1155 return;
1156
1157 if (!port->xmit_buf)
1158 return;
1159
1160 spin_lock_irqsave(&card->card_lock, flags);
1161 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
1162 spin_unlock_irqrestore(&card->card_lock, flags);
1163 return;
1164 }
1165
1166 port->xmit_buf[port->xmit_head++] = ch;
1167 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
1168 port->xmit_cnt++;
1169 spin_unlock_irqrestore(&card->card_lock, flags);
1170 }
1171
1172 /* flush_chars et all */
1173 static void isicom_flush_chars(struct tty_struct *tty)
1174 {
1175 struct isi_port *port = tty->driver_data;
1176
1177 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1178 return;
1179
1180 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1181 !port->xmit_buf)
1182 return;
1183
1184 /* this tells the transmitter to consider this port for
1185 data output to the card ... that's the best we can do. */
1186 port->status |= ISI_TXOK;
1187 }
1188
1189 /* write_room et all */
1190 static int isicom_write_room(struct tty_struct *tty)
1191 {
1192 struct isi_port *port = tty->driver_data;
1193 int free;
1194
1195 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1196 return 0;
1197
1198 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1199 if (free < 0)
1200 free = 0;
1201 return free;
1202 }
1203
1204 /* chars_in_buffer et all */
1205 static int isicom_chars_in_buffer(struct tty_struct *tty)
1206 {
1207 struct isi_port *port = tty->driver_data;
1208 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1209 return 0;
1210 return port->xmit_cnt;
1211 }
1212
1213 /* ioctl et all */
1214 static inline void isicom_send_break(struct isi_port *port,
1215 unsigned long length)
1216 {
1217 struct isi_board *card = port->card;
1218 unsigned long base = card->base;
1219
1220 if (!lock_card(card))
1221 return;
1222
1223 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1224 outw((length & 0xff) << 8 | 0x00, base);
1225 outw((length & 0xff00), base);
1226 InterruptTheCard(base);
1227
1228 unlock_card(card);
1229 }
1230
1231 static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
1232 {
1233 struct isi_port *port = tty->driver_data;
1234 /* just send the port status */
1235 u16 status = port->status;
1236
1237 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1238 return -ENODEV;
1239
1240 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1241 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1242 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1243 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1244 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1245 ((status & ISI_RI ) ? TIOCM_RI : 0);
1246 }
1247
1248 static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
1249 unsigned int set, unsigned int clear)
1250 {
1251 struct isi_port *port = tty->driver_data;
1252 unsigned long flags;
1253
1254 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1255 return -ENODEV;
1256
1257 spin_lock_irqsave(&port->card->card_lock, flags);
1258 if (set & TIOCM_RTS)
1259 raise_rts(port);
1260 if (set & TIOCM_DTR)
1261 raise_dtr(port);
1262
1263 if (clear & TIOCM_RTS)
1264 drop_rts(port);
1265 if (clear & TIOCM_DTR)
1266 drop_dtr(port);
1267 spin_unlock_irqrestore(&port->card->card_lock, flags);
1268
1269 return 0;
1270 }
1271
1272 static int isicom_set_serial_info(struct isi_port *port,
1273 struct serial_struct __user *info)
1274 {
1275 struct serial_struct newinfo;
1276 int reconfig_port;
1277
1278 if (copy_from_user(&newinfo, info, sizeof(newinfo)))
1279 return -EFAULT;
1280
1281 reconfig_port = ((port->flags & ASYNC_SPD_MASK) !=
1282 (newinfo.flags & ASYNC_SPD_MASK));
1283
1284 if (!capable(CAP_SYS_ADMIN)) {
1285 if ((newinfo.close_delay != port->close_delay) ||
1286 (newinfo.closing_wait != port->closing_wait) ||
1287 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1288 (port->flags & ~ASYNC_USR_MASK)))
1289 return -EPERM;
1290 port->flags = ((port->flags & ~ ASYNC_USR_MASK) |
1291 (newinfo.flags & ASYNC_USR_MASK));
1292 }
1293 else {
1294 port->close_delay = newinfo.close_delay;
1295 port->closing_wait = newinfo.closing_wait;
1296 port->flags = ((port->flags & ~ASYNC_FLAGS) |
1297 (newinfo.flags & ASYNC_FLAGS));
1298 }
1299 if (reconfig_port) {
1300 unsigned long flags;
1301 spin_lock_irqsave(&port->card->card_lock, flags);
1302 isicom_config_port(port);
1303 spin_unlock_irqrestore(&port->card->card_lock, flags);
1304 }
1305 return 0;
1306 }
1307
1308 static int isicom_get_serial_info(struct isi_port *port,
1309 struct serial_struct __user *info)
1310 {
1311 struct serial_struct out_info;
1312
1313 memset(&out_info, 0, sizeof(out_info));
1314 /* out_info.type = ? */
1315 out_info.line = port - isi_ports;
1316 out_info.port = port->card->base;
1317 out_info.irq = port->card->irq;
1318 out_info.flags = port->flags;
1319 /* out_info.baud_base = ? */
1320 out_info.close_delay = port->close_delay;
1321 out_info.closing_wait = port->closing_wait;
1322 if (copy_to_user(info, &out_info, sizeof(out_info)))
1323 return -EFAULT;
1324 return 0;
1325 }
1326
1327 static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
1328 unsigned int cmd, unsigned long arg)
1329 {
1330 struct isi_port *port = tty->driver_data;
1331 void __user *argp = (void __user *)arg;
1332 int retval;
1333
1334 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1335 return -ENODEV;
1336
1337 switch(cmd) {
1338 case TCSBRK:
1339 retval = tty_check_change(tty);
1340 if (retval)
1341 return retval;
1342 tty_wait_until_sent(tty, 0);
1343 if (!arg)
1344 isicom_send_break(port, HZ/4);
1345 return 0;
1346
1347 case TCSBRKP:
1348 retval = tty_check_change(tty);
1349 if (retval)
1350 return retval;
1351 tty_wait_until_sent(tty, 0);
1352 isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4);
1353 return 0;
1354
1355 case TIOCGSOFTCAR:
1356 return put_user(C_CLOCAL(tty) ? 1 : 0,
1357 (unsigned long __user *)argp);
1358
1359 case TIOCSSOFTCAR:
1360 if (get_user(arg, (unsigned long __user *) argp))
1361 return -EFAULT;
1362 tty->termios->c_cflag =
1363 ((tty->termios->c_cflag & ~CLOCAL) |
1364 (arg ? CLOCAL : 0));
1365 return 0;
1366
1367 case TIOCGSERIAL:
1368 return isicom_get_serial_info(port, argp);
1369
1370 case TIOCSSERIAL:
1371 return isicom_set_serial_info(port, argp);
1372
1373 default:
1374 return -ENOIOCTLCMD;
1375 }
1376 return 0;
1377 }
1378
1379 /* set_termios et all */
1380 static void isicom_set_termios(struct tty_struct *tty,
1381 struct ktermios *old_termios)
1382 {
1383 struct isi_port *port = tty->driver_data;
1384 unsigned long flags;
1385
1386 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1387 return;
1388
1389 if (tty->termios->c_cflag == old_termios->c_cflag &&
1390 tty->termios->c_iflag == old_termios->c_iflag)
1391 return;
1392
1393 spin_lock_irqsave(&port->card->card_lock, flags);
1394 isicom_config_port(port);
1395 spin_unlock_irqrestore(&port->card->card_lock, flags);
1396
1397 if ((old_termios->c_cflag & CRTSCTS) &&
1398 !(tty->termios->c_cflag & CRTSCTS)) {
1399 tty->hw_stopped = 0;
1400 isicom_start(tty);
1401 }
1402 }
1403
1404 /* throttle et all */
1405 static void isicom_throttle(struct tty_struct *tty)
1406 {
1407 struct isi_port *port = tty->driver_data;
1408 struct isi_board *card = port->card;
1409
1410 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1411 return;
1412
1413 /* tell the card that this port cannot handle any more data for now */
1414 card->port_status &= ~(1 << port->channel);
1415 outw(card->port_status, card->base + 0x02);
1416 }
1417
1418 /* unthrottle et all */
1419 static void isicom_unthrottle(struct tty_struct *tty)
1420 {
1421 struct isi_port *port = tty->driver_data;
1422 struct isi_board *card = port->card;
1423
1424 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1425 return;
1426
1427 /* tell the card that this port is ready to accept more data */
1428 card->port_status |= (1 << port->channel);
1429 outw(card->port_status, card->base + 0x02);
1430 }
1431
1432 /* stop et all */
1433 static void isicom_stop(struct tty_struct *tty)
1434 {
1435 struct isi_port *port = tty->driver_data;
1436
1437 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1438 return;
1439
1440 /* this tells the transmitter not to consider this port for
1441 data output to the card. */
1442 port->status &= ~ISI_TXOK;
1443 }
1444
1445 /* start et all */
1446 static void isicom_start(struct tty_struct *tty)
1447 {
1448 struct isi_port *port = tty->driver_data;
1449
1450 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1451 return;
1452
1453 /* this tells the transmitter to consider this port for
1454 data output to the card. */
1455 port->status |= ISI_TXOK;
1456 }
1457
1458 static void isicom_hangup(struct tty_struct *tty)
1459 {
1460 struct isi_port *port = tty->driver_data;
1461 unsigned long flags;
1462
1463 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1464 return;
1465
1466 spin_lock_irqsave(&port->card->card_lock, flags);
1467 isicom_shutdown_port(port);
1468 spin_unlock_irqrestore(&port->card->card_lock, flags);
1469
1470 port->count = 0;
1471 port->flags &= ~ASYNC_NORMAL_ACTIVE;
1472 port->tty = NULL;
1473 wake_up_interruptible(&port->open_wait);
1474 }
1475
1476 /* flush_buffer et all */
1477 static void isicom_flush_buffer(struct tty_struct *tty)
1478 {
1479 struct isi_port *port = tty->driver_data;
1480 struct isi_board *card = port->card;
1481 unsigned long flags;
1482
1483 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
1484 return;
1485
1486 spin_lock_irqsave(&card->card_lock, flags);
1487 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1488 spin_unlock_irqrestore(&card->card_lock, flags);
1489
1490 tty_wakeup(tty);
1491 }
1492
1493 /*
1494 * Driver init and deinit functions
1495 */
1496
1497 static const struct tty_operations isicom_ops = {
1498 .open = isicom_open,
1499 .close = isicom_close,
1500 .write = isicom_write,
1501 .put_char = isicom_put_char,
1502 .flush_chars = isicom_flush_chars,
1503 .write_room = isicom_write_room,
1504 .chars_in_buffer = isicom_chars_in_buffer,
1505 .ioctl = isicom_ioctl,
1506 .set_termios = isicom_set_termios,
1507 .throttle = isicom_throttle,
1508 .unthrottle = isicom_unthrottle,
1509 .stop = isicom_stop,
1510 .start = isicom_start,
1511 .hangup = isicom_hangup,
1512 .flush_buffer = isicom_flush_buffer,
1513 .tiocmget = isicom_tiocmget,
1514 .tiocmset = isicom_tiocmset,
1515 };
1516
1517 static int __devinit reset_card(struct pci_dev *pdev,
1518 const unsigned int card, unsigned int *signature)
1519 {
1520 struct isi_board *board = pci_get_drvdata(pdev);
1521 unsigned long base = board->base;
1522 unsigned int sig, portcount = 0;
1523 int retval = 0;
1524
1525 dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1526 base);
1527
1528 inw(base + 0x8);
1529
1530 msleep(10);
1531
1532 outw(0, base + 0x8); /* Reset */
1533
1534 msleep(1000);
1535
1536 sig = inw(base + 0x4) & 0xff;
1537
1538 if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1539 sig != 0xee) {
1540 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1541 "bad I/O Port Address 0x%lx).\n", card + 1, base);
1542 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1543 retval = -EIO;
1544 goto end;
1545 }
1546
1547 msleep(10);
1548
1549 portcount = inw(base + 0x2);
1550 if (!inw(base + 0xe) & 0x1 || (portcount != 0 && portcount != 4 &&
1551 portcount != 8 && portcount != 16)) {
1552 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.",
1553 card + 1);
1554 retval = -EIO;
1555 goto end;
1556 }
1557
1558 switch (sig) {
1559 case 0xa5:
1560 case 0xbb:
1561 case 0xdd:
1562 board->port_count = (portcount == 4) ? 4 : 8;
1563 board->shift_count = 12;
1564 break;
1565 case 0xcc:
1566 case 0xee:
1567 board->port_count = 16;
1568 board->shift_count = 11;
1569 break;
1570 }
1571 dev_info(&pdev->dev, "-Done\n");
1572 *signature = sig;
1573
1574 end:
1575 return retval;
1576 }
1577
1578 static int __devinit load_firmware(struct pci_dev *pdev,
1579 const unsigned int index, const unsigned int signature)
1580 {
1581 struct isi_board *board = pci_get_drvdata(pdev);
1582 const struct firmware *fw;
1583 unsigned long base = board->base;
1584 unsigned int a;
1585 u16 word_count, status;
1586 int retval = -EIO;
1587 char *name;
1588 u8 *data;
1589
1590 struct stframe {
1591 u16 addr;
1592 u16 count;
1593 u8 data[0];
1594 } *frame;
1595
1596 switch (signature) {
1597 case 0xa5:
1598 name = "isi608.bin";
1599 break;
1600 case 0xbb:
1601 name = "isi608em.bin";
1602 break;
1603 case 0xcc:
1604 name = "isi616em.bin";
1605 break;
1606 case 0xdd:
1607 name = "isi4608.bin";
1608 break;
1609 case 0xee:
1610 name = "isi4616.bin";
1611 break;
1612 default:
1613 dev_err(&pdev->dev, "Unknown signature.\n");
1614 goto end;
1615 }
1616
1617 retval = request_firmware(&fw, name, &pdev->dev);
1618 if (retval)
1619 goto end;
1620
1621 retval = -EIO;
1622
1623 for (frame = (struct stframe *)fw->data;
1624 frame < (struct stframe *)(fw->data + fw->size);
1625 frame = (struct stframe *)((u8 *)(frame + 1) +
1626 frame->count)) {
1627 if (WaitTillCardIsFree(base))
1628 goto errrelfw;
1629
1630 outw(0xf0, base); /* start upload sequence */
1631 outw(0x00, base);
1632 outw(frame->addr, base); /* lsb of address */
1633
1634 word_count = frame->count / 2 + frame->count % 2;
1635 outw(word_count, base);
1636 InterruptTheCard(base);
1637
1638 udelay(100); /* 0x2f */
1639
1640 if (WaitTillCardIsFree(base))
1641 goto errrelfw;
1642
1643 if ((status = inw(base + 0x4)) != 0) {
1644 dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1645 "Address:0x%x\nCount:0x%x\nStatus:0x%x\n",
1646 index + 1, frame->addr, frame->count, status);
1647 goto errrelfw;
1648 }
1649 outsw(base, frame->data, word_count);
1650
1651 InterruptTheCard(base);
1652
1653 udelay(50); /* 0x0f */
1654
1655 if (WaitTillCardIsFree(base))
1656 goto errrelfw;
1657
1658 if ((status = inw(base + 0x4)) != 0) {
1659 dev_err(&pdev->dev, "Card%d got out of sync.Card "
1660 "Status:0x%x\n", index + 1, status);
1661 goto errrelfw;
1662 }
1663 }
1664
1665 /* XXX: should we test it by reading it back and comparing with original like
1666 * in load firmware package? */
1667 for (frame = (struct stframe *)fw->data;
1668 frame < (struct stframe *)(fw->data + fw->size);
1669 frame = (struct stframe *)((u8 *)(frame + 1) +
1670 frame->count)) {
1671 if (WaitTillCardIsFree(base))
1672 goto errrelfw;
1673
1674 outw(0xf1, base); /* start download sequence */
1675 outw(0x00, base);
1676 outw(frame->addr, base); /* lsb of address */
1677
1678 word_count = (frame->count >> 1) + frame->count % 2;
1679 outw(word_count + 1, base);
1680 InterruptTheCard(base);
1681
1682 udelay(50); /* 0xf */
1683
1684 if (WaitTillCardIsFree(base))
1685 goto errrelfw;
1686
1687 if ((status = inw(base + 0x4)) != 0) {
1688 dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1689 "Address:0x%x\nCount:0x%x\nStatus: 0x%x\n",
1690 index + 1, frame->addr, frame->count, status);
1691 goto errrelfw;
1692 }
1693
1694 data = kmalloc(word_count * 2, GFP_KERNEL);
1695 if (data == NULL) {
1696 dev_err(&pdev->dev, "Card%d, firmware upload "
1697 "failed, not enough memory\n", index + 1);
1698 goto errrelfw;
1699 }
1700 inw(base);
1701 insw(base, data, word_count);
1702 InterruptTheCard(base);
1703
1704 for (a = 0; a < frame->count; a++)
1705 if (data[a] != frame->data[a]) {
1706 kfree(data);
1707 dev_err(&pdev->dev, "Card%d, firmware upload "
1708 "failed\n", index + 1);
1709 goto errrelfw;
1710 }
1711 kfree(data);
1712
1713 udelay(50); /* 0xf */
1714
1715 if (WaitTillCardIsFree(base))
1716 goto errrelfw;
1717
1718 if ((status = inw(base + 0x4)) != 0) {
1719 dev_err(&pdev->dev, "Card%d verify got out of sync. "
1720 "Card Status:0x%x\n", index + 1, status);
1721 goto errrelfw;
1722 }
1723 }
1724
1725 /* xfer ctrl */
1726 if (WaitTillCardIsFree(base))
1727 goto errrelfw;
1728
1729 outw(0xf2, base);
1730 outw(0x800, base);
1731 outw(0x0, base);
1732 outw(0x0, base);
1733 InterruptTheCard(base);
1734 outw(0x0, base + 0x4); /* for ISI4608 cards */
1735
1736 board->status |= FIRMWARE_LOADED;
1737 retval = 0;
1738
1739 errrelfw:
1740 release_firmware(fw);
1741 end:
1742 return retval;
1743 }
1744
1745 /*
1746 * Insmod can set static symbols so keep these static
1747 */
1748 static unsigned int card_count;
1749
1750 static int __devinit isicom_probe(struct pci_dev *pdev,
1751 const struct pci_device_id *ent)
1752 {
1753 unsigned int ioaddr, signature, index;
1754 int retval = -EPERM;
1755 u8 pciirq;
1756 struct isi_board *board = NULL;
1757
1758 if (card_count >= BOARD_COUNT)
1759 goto err;
1760
1761 ioaddr = pci_resource_start(pdev, 3);
1762 /* i.e at offset 0x1c in the PCI configuration register space. */
1763 pciirq = pdev->irq;
1764 dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1765
1766 /* allot the first empty slot in the array */
1767 for (index = 0; index < BOARD_COUNT; index++)
1768 if (isi_card[index].base == 0) {
1769 board = &isi_card[index];
1770 break;
1771 }
1772
1773 board->index = index;
1774 board->base = ioaddr;
1775 board->irq = pciirq;
1776 card_count++;
1777
1778 pci_set_drvdata(pdev, board);
1779
1780 retval = pci_request_region(pdev, 3, ISICOM_NAME);
1781 if (retval) {
1782 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1783 "will be disabled.\n", board->base, board->base + 15,
1784 index + 1);
1785 retval = -EBUSY;
1786 goto errdec;
1787 }
1788
1789 retval = request_irq(board->irq, isicom_interrupt,
1790 IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board);
1791 if (retval < 0) {
1792 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1793 "Card%d will be disabled.\n", board->irq, index + 1);
1794 goto errunrr;
1795 }
1796
1797 retval = reset_card(pdev, index, &signature);
1798 if (retval < 0)
1799 goto errunri;
1800
1801 retval = load_firmware(pdev, index, signature);
1802 if (retval < 0)
1803 goto errunri;
1804
1805 for (index = 0; index < board->port_count; index++)
1806 tty_register_device(isicom_normal, board->index * 16 + index,
1807 &pdev->dev);
1808
1809 return 0;
1810
1811 errunri:
1812 free_irq(board->irq, board);
1813 errunrr:
1814 pci_release_region(pdev, 3);
1815 errdec:
1816 board->base = 0;
1817 card_count--;
1818 err:
1819 return retval;
1820 }
1821
1822 static void __devexit isicom_remove(struct pci_dev *pdev)
1823 {
1824 struct isi_board *board = pci_get_drvdata(pdev);
1825 unsigned int i;
1826
1827 for (i = 0; i < board->port_count; i++)
1828 tty_unregister_device(isicom_normal, board->index * 16 + i);
1829
1830 free_irq(board->irq, board);
1831 pci_release_region(pdev, 3);
1832 board->base = 0;
1833 card_count--;
1834 }
1835
1836 static int __init isicom_init(void)
1837 {
1838 int retval, idx, channel;
1839 struct isi_port *port;
1840
1841 for(idx = 0; idx < BOARD_COUNT; idx++) {
1842 port = &isi_ports[idx * 16];
1843 isi_card[idx].ports = port;
1844 spin_lock_init(&isi_card[idx].card_lock);
1845 for (channel = 0; channel < 16; channel++, port++) {
1846 port->magic = ISICOM_MAGIC;
1847 port->card = &isi_card[idx];
1848 port->channel = channel;
1849 port->close_delay = 50 * HZ/100;
1850 port->closing_wait = 3000 * HZ/100;
1851 port->status = 0;
1852 init_waitqueue_head(&port->open_wait);
1853 init_waitqueue_head(&port->close_wait);
1854 /* . . . */
1855 }
1856 isi_card[idx].base = 0;
1857 isi_card[idx].irq = 0;
1858 }
1859
1860 /* tty driver structure initialization */
1861 isicom_normal = alloc_tty_driver(PORT_COUNT);
1862 if (!isicom_normal) {
1863 retval = -ENOMEM;
1864 goto error;
1865 }
1866
1867 isicom_normal->owner = THIS_MODULE;
1868 isicom_normal->name = "ttyM";
1869 isicom_normal->major = ISICOM_NMAJOR;
1870 isicom_normal->minor_start = 0;
1871 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1872 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1873 isicom_normal->init_termios = tty_std_termios;
1874 isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
1875 CLOCAL;
1876 isicom_normal->flags = TTY_DRIVER_REAL_RAW |
1877 TTY_DRIVER_DYNAMIC_DEV;
1878 tty_set_operations(isicom_normal, &isicom_ops);
1879
1880 retval = tty_register_driver(isicom_normal);
1881 if (retval) {
1882 pr_dbg("Couldn't register the dialin driver\n");
1883 goto err_puttty;
1884 }
1885
1886 retval = pci_register_driver(&isicom_driver);
1887 if (retval < 0) {
1888 printk(KERN_ERR "ISICOM: Unable to register pci driver.\n");
1889 goto err_unrtty;
1890 }
1891
1892 mod_timer(&tx, jiffies + 1);
1893
1894 return 0;
1895 err_unrtty:
1896 tty_unregister_driver(isicom_normal);
1897 err_puttty:
1898 put_tty_driver(isicom_normal);
1899 error:
1900 return retval;
1901 }
1902
1903 static void __exit isicom_exit(void)
1904 {
1905 re_schedule = 0;
1906
1907 wait_for_completion_timeout(&isi_timerdone, HZ);
1908
1909 pci_unregister_driver(&isicom_driver);
1910 tty_unregister_driver(isicom_normal);
1911 put_tty_driver(isicom_normal);
1912 }
1913
1914 module_init(isicom_init);
1915 module_exit(isicom_exit);
1916
1917 MODULE_AUTHOR("MultiTech");
1918 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1919 MODULE_LICENSE("GPL");
Linux with added FPC-III support