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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@lxorguk.ukuu.org.uk
11 * Merge to 2.0.x kernel tree
12 * 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
16 * 9/12/98 alan@lxorguk.ukuu.org.uk
17 * Rough port to 2.1.x
18 *
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.
25 * This is to prevent the firmware
26 * 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
36 * when the last port on the card is
37 * closed.
38 *
39 * 10/5/00 sameer Signal mask setup command added
40 * to isicom_setup_port and
41 * isicom_shutdown_port.
42 *
43 * 24/5/00 sameer The driver is now SMP aware.
44 *
45 *
46 * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem
47 *
48 *
49 * 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 *
55 * 11/04/01 Kevin Fixed firmware load problem with
56 * ISIHP-4X card
57 *
58 * 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
67 * info during insmod as well as module
68 * listing by lsmod.
69 *
70 * 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.
78 *
79 * 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 *
84 * 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
91 * 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 *
98 * To use this driver you also need the support package. You
99 * can find this in RPM format on
100 * ftp://ftp.linux.org.uk/pub/linux/alan
101 *
102 * 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.d/)
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
112 * Merge testing
113 * 64-bit verification
114 */
115
116#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
117
118#include <linux/module.h>
119#include <linux/firmware.h>
120#include <linux/kernel.h>
121#include <linux/tty.h>
122#include <linux/tty_flip.h>
123#include <linux/termios.h>
124#include <linux/fs.h>
125#include <linux/sched.h>
126#include <linux/serial.h>
127#include <linux/mm.h>
128#include <linux/interrupt.h>
129#include <linux/timer.h>
130#include <linux/delay.h>
131#include <linux/ioport.h>
132#include <linux/slab.h>
133
134#include <linux/uaccess.h>
135#include <linux/io.h>
136
137#include <linux/pci.h>
138
139#include <linux/isicom.h>
140
141#define InterruptTheCard(base) outw(0, (base) + 0xc)
142#define ClearInterrupt(base) inw((base) + 0x0a)
143
144#ifdef DEBUG
145#define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
146#else
147#define isicom_paranoia_check(a, b, c) 0
148#endif
149
150static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
151static void isicom_remove(struct pci_dev *);
152
153static struct pci_device_id isicom_pci_tbl[] = {
154 { 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) },
163 { 0 }
164};
165MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
166
167static struct pci_driver isicom_driver = {
168 .name = "isicom",
169 .id_table = isicom_pci_tbl,
170 .probe = isicom_probe,
171 .remove = isicom_remove
172};
173
174static int prev_card = 3; /* start servicing isi_card[0] */
175static struct tty_driver *isicom_normal;
176
177static void isicom_tx(unsigned long _data);
178static void isicom_start(struct tty_struct *tty);
179
180static DEFINE_TIMER(tx, isicom_tx, 0, 0);
181
182/* baud index mappings from linux defns to isi */
183
184static signed char linuxb_to_isib[] = {
185 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
186};
187
188struct isi_board {
189 unsigned long base;
190 int irq;
191 unsigned char port_count;
192 unsigned short status;
193 unsigned short port_status; /* each bit for each port */
194 unsigned short shift_count;
195 struct isi_port *ports;
196 signed char count;
197 spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
198 unsigned long flags;
199 unsigned int index;
200};
201
202struct isi_port {
203 unsigned short magic;
204 struct tty_port port;
205 u16 channel;
206 u16 status;
207 struct isi_board *card;
208 unsigned char *xmit_buf;
209 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 */
222
223static int WaitTillCardIsFree(unsigned long base)
224{
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
237static int lock_card(struct isi_board *card)
238{
239 unsigned long base = card->base;
240 unsigned int retries, a;
241
242 for (retries = 0; retries < 10; retries++) {
243 spin_lock_irqsave(&card->card_lock, card->flags);
244 for (a = 0; a < 10; a++) {
245 if (inw(base + 0xe) & 0x1)
246 return 1;
247 udelay(10);
248 }
249 spin_unlock_irqrestore(&card->card_lock, card->flags);
250 msleep(10);
251 }
252 pr_warn("Failed to lock Card (0x%lx)\n", card->base);
253
254 return 0; /* Failed to acquire the card! */
255}
256
257static void unlock_card(struct isi_board *card)
258{
259 spin_unlock_irqrestore(&card->card_lock, card->flags);
260}
261
262/*
263 * ISI Card specific ops ...
264 */
265
266/* card->lock HAS to be held */
267static void raise_dtr(struct isi_port *port)
268{
269 struct isi_board *card = port->card;
270 unsigned long base = card->base;
271 u16 channel = port->channel;
272
273 if (WaitTillCardIsFree(base))
274 return;
275
276 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
277 outw(0x0504, base);
278 InterruptTheCard(base);
279 port->status |= ISI_DTR;
280}
281
282/* card->lock HAS to be held */
283static void drop_dtr(struct isi_port *port)
284{
285 struct isi_board *card = port->card;
286 unsigned long base = card->base;
287 u16 channel = port->channel;
288
289 if (WaitTillCardIsFree(base))
290 return;
291
292 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
293 outw(0x0404, base);
294 InterruptTheCard(base);
295 port->status &= ~ISI_DTR;
296}
297
298/* card->lock HAS to be held */
299static inline void raise_rts(struct isi_port *port)
300{
301 struct isi_board *card = port->card;
302 unsigned long base = card->base;
303 u16 channel = port->channel;
304
305 if (WaitTillCardIsFree(base))
306 return;
307
308 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
309 outw(0x0a04, base);
310 InterruptTheCard(base);
311 port->status |= ISI_RTS;
312}
313
314/* card->lock HAS to be held */
315static inline void drop_rts(struct isi_port *port)
316{
317 struct isi_board *card = port->card;
318 unsigned long base = card->base;
319 u16 channel = port->channel;
320
321 if (WaitTillCardIsFree(base))
322 return;
323
324 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
325 outw(0x0804, base);
326 InterruptTheCard(base);
327 port->status &= ~ISI_RTS;
328}
329
330/* card->lock MUST NOT be held */
331
332static void isicom_dtr_rts(struct tty_port *port, int on)
333{
334 struct isi_port *ip = container_of(port, struct isi_port, port);
335 struct isi_board *card = ip->card;
336 unsigned long base = card->base;
337 u16 channel = ip->channel;
338
339 if (!lock_card(card))
340 return;
341
342 if (on) {
343 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
344 outw(0x0f04, base);
345 InterruptTheCard(base);
346 ip->status |= (ISI_DTR | ISI_RTS);
347 } else {
348 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
349 outw(0x0C04, base);
350 InterruptTheCard(base);
351 ip->status &= ~(ISI_DTR | ISI_RTS);
352 }
353 unlock_card(card);
354}
355
356/* card->lock HAS to be held */
357static void drop_dtr_rts(struct isi_port *port)
358{
359 struct isi_board *card = port->card;
360 unsigned long base = card->base;
361 u16 channel = port->channel;
362
363 if (WaitTillCardIsFree(base))
364 return;
365
366 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
367 outw(0x0c04, base);
368 InterruptTheCard(base);
369 port->status &= ~(ISI_RTS | ISI_DTR);
370}
371
372/*
373 * ISICOM Driver specific routines ...
374 *
375 */
376
377static inline int __isicom_paranoia_check(struct isi_port const *port,
378 char *name, const char *routine)
379{
380 if (!port) {
381 pr_warn("Warning: bad isicom magic for dev %s in %s\n",
382 name, routine);
383 return 1;
384 }
385 if (port->magic != ISICOM_MAGIC) {
386 pr_warn("Warning: NULL isicom port for dev %s in %s\n",
387 name, routine);
388 return 1;
389 }
390
391 return 0;
392}
393
394/*
395 * Transmitter.
396 *
397 * We shovel data into the card buffers on a regular basis. The card
398 * will do the rest of the work for us.
399 */
400
401static void isicom_tx(unsigned long _data)
402{
403 unsigned long flags, base;
404 unsigned int retries;
405 short count = (BOARD_COUNT-1), card;
406 short txcount, wrd, residue, word_count, cnt;
407 struct isi_port *port;
408 struct tty_struct *tty;
409
410 /* find next active board */
411 card = (prev_card + 1) & 0x0003;
412 while (count-- > 0) {
413 if (isi_card[card].status & BOARD_ACTIVE)
414 break;
415 card = (card + 1) & 0x0003;
416 }
417 if (!(isi_card[card].status & BOARD_ACTIVE))
418 goto sched_again;
419
420 prev_card = card;
421
422 count = isi_card[card].port_count;
423 port = isi_card[card].ports;
424 base = isi_card[card].base;
425
426 spin_lock_irqsave(&isi_card[card].card_lock, flags);
427 for (retries = 0; retries < 100; retries++) {
428 if (inw(base + 0xe) & 0x1)
429 break;
430 udelay(2);
431 }
432 if (retries >= 100)
433 goto unlock;
434
435 tty = tty_port_tty_get(&port->port);
436 if (tty == NULL)
437 goto put_unlock;
438
439 for (; count > 0; count--, port++) {
440 /* port not active or tx disabled to force flow control */
441 if (!tty_port_initialized(&port->port) ||
442 !(port->status & ISI_TXOK))
443 continue;
444
445 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
446 if (txcount <= 0 || tty->stopped || tty->hw_stopped)
447 continue;
448
449 if (!(inw(base + 0x02) & (1 << port->channel)))
450 continue;
451
452 pr_debug("txing %d bytes, port%d.\n",
453 txcount, port->channel + 1);
454 outw((port->channel << isi_card[card].shift_count) | txcount,
455 base);
456 residue = NO;
457 wrd = 0;
458 while (1) {
459 cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
460 - port->xmit_tail));
461 if (residue == YES) {
462 residue = NO;
463 if (cnt > 0) {
464 wrd |= (port->port.xmit_buf[port->xmit_tail]
465 << 8);
466 port->xmit_tail = (port->xmit_tail + 1)
467 & (SERIAL_XMIT_SIZE - 1);
468 port->xmit_cnt--;
469 txcount--;
470 cnt--;
471 outw(wrd, base);
472 } else {
473 outw(wrd, base);
474 break;
475 }
476 }
477 if (cnt <= 0)
478 break;
479 word_count = cnt >> 1;
480 outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
481 port->xmit_tail = (port->xmit_tail
482 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
483 txcount -= (word_count << 1);
484 port->xmit_cnt -= (word_count << 1);
485 if (cnt & 0x0001) {
486 residue = YES;
487 wrd = port->port.xmit_buf[port->xmit_tail];
488 port->xmit_tail = (port->xmit_tail + 1)
489 & (SERIAL_XMIT_SIZE - 1);
490 port->xmit_cnt--;
491 txcount--;
492 }
493 }
494
495 InterruptTheCard(base);
496 if (port->xmit_cnt <= 0)
497 port->status &= ~ISI_TXOK;
498 if (port->xmit_cnt <= WAKEUP_CHARS)
499 tty_wakeup(tty);
500 }
501
502put_unlock:
503 tty_kref_put(tty);
504unlock:
505 spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
506 /* schedule another tx for hopefully in about 10ms */
507sched_again:
508 mod_timer(&tx, jiffies + msecs_to_jiffies(10));
509}
510
511/*
512 * Main interrupt handler routine
513 */
514
515static irqreturn_t isicom_interrupt(int irq, void *dev_id)
516{
517 struct isi_board *card = dev_id;
518 struct isi_port *port;
519 struct tty_struct *tty;
520 unsigned long base;
521 u16 header, word_count, count, channel;
522 short byte_count;
523 unsigned char *rp;
524
525 if (!card || !(card->status & FIRMWARE_LOADED))
526 return IRQ_NONE;
527
528 base = card->base;
529
530 /* did the card interrupt us? */
531 if (!(inw(base + 0x0e) & 0x02))
532 return IRQ_NONE;
533
534 spin_lock(&card->card_lock);
535
536 /*
537 * disable any interrupts from the PCI card and lower the
538 * interrupt line
539 */
540 outw(0x8000, base+0x04);
541 ClearInterrupt(base);
542
543 inw(base); /* get the dummy word out */
544 header = inw(base);
545 channel = (header & 0x7800) >> card->shift_count;
546 byte_count = header & 0xff;
547
548 if (channel + 1 > card->port_count) {
549 pr_warn("%s(0x%lx): %d(channel) > port_count\n",
550 __func__, base, channel + 1);
551 outw(0x0000, base+0x04); /* enable interrupts */
552 spin_unlock(&card->card_lock);
553 return IRQ_HANDLED;
554 }
555 port = card->ports + channel;
556 if (!tty_port_initialized(&port->port)) {
557 outw(0x0000, base+0x04); /* enable interrupts */
558 spin_unlock(&card->card_lock);
559 return IRQ_HANDLED;
560 }
561
562 tty = tty_port_tty_get(&port->port);
563 if (tty == NULL) {
564 word_count = byte_count >> 1;
565 while (byte_count > 1) {
566 inw(base);
567 byte_count -= 2;
568 }
569 if (byte_count & 0x01)
570 inw(base);
571 outw(0x0000, base+0x04); /* enable interrupts */
572 spin_unlock(&card->card_lock);
573 return IRQ_HANDLED;
574 }
575
576 if (header & 0x8000) { /* Status Packet */
577 header = inw(base);
578 switch (header & 0xff) {
579 case 0: /* Change in EIA signals */
580 if (tty_port_check_carrier(&port->port)) {
581 if (port->status & ISI_DCD) {
582 if (!(header & ISI_DCD)) {
583 /* Carrier has been lost */
584 pr_debug("%s: DCD->low.\n",
585 __func__);
586 port->status &= ~ISI_DCD;
587 tty_hangup(tty);
588 }
589 } else if (header & ISI_DCD) {
590 /* Carrier has been detected */
591 pr_debug("%s: DCD->high.\n",
592 __func__);
593 port->status |= ISI_DCD;
594 wake_up_interruptible(&port->port.open_wait);
595 }
596 } else {
597 if (header & ISI_DCD)
598 port->status |= ISI_DCD;
599 else
600 port->status &= ~ISI_DCD;
601 }
602
603 if (tty_port_cts_enabled(&port->port)) {
604 if (tty->hw_stopped) {
605 if (header & ISI_CTS) {
606 tty->hw_stopped = 0;
607 /* start tx ing */
608 port->status |= (ISI_TXOK
609 | ISI_CTS);
610 tty_wakeup(tty);
611 }
612 } else if (!(header & ISI_CTS)) {
613 tty->hw_stopped = 1;
614 /* stop tx ing */
615 port->status &= ~(ISI_TXOK | ISI_CTS);
616 }
617 } else {
618 if (header & ISI_CTS)
619 port->status |= ISI_CTS;
620 else
621 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
636 case 1: /* Received Break !!! */
637 tty_insert_flip_char(&port->port, 0, TTY_BREAK);
638 if (port->port.flags & ASYNC_SAK)
639 do_SAK(tty);
640 tty_flip_buffer_push(&port->port);
641 break;
642
643 case 2: /* Statistics */
644 pr_debug("%s: stats!!!\n", __func__);
645 break;
646
647 default:
648 pr_debug("%s: Unknown code in status packet.\n",
649 __func__);
650 break;
651 }
652 } else { /* Data Packet */
653 count = tty_prepare_flip_string(&port->port, &rp,
654 byte_count & ~1);
655 pr_debug("%s: Can rx %d of %d bytes.\n",
656 __func__, count, byte_count);
657 word_count = count >> 1;
658 insw(base, rp, word_count);
659 byte_count -= (word_count << 1);
660 if (count & 0x0001) {
661 tty_insert_flip_char(&port->port, inw(base) & 0xff,
662 TTY_NORMAL);
663 byte_count -= 2;
664 }
665 if (byte_count > 0) {
666 pr_debug("%s(0x%lx:%d): Flip buffer overflow! dropping bytes...\n",
667 __func__, base, channel + 1);
668 /* drain out unread xtra data */
669 while (byte_count > 0) {
670 inw(base);
671 byte_count -= 2;
672 }
673 }
674 tty_flip_buffer_push(&port->port);
675 }
676 outw(0x0000, base+0x04); /* enable interrupts */
677 spin_unlock(&card->card_lock);
678 tty_kref_put(tty);
679
680 return IRQ_HANDLED;
681}
682
683static void isicom_config_port(struct tty_struct *tty)
684{
685 struct isi_port *port = tty->driver_data;
686 struct isi_board *card = port->card;
687 unsigned long baud;
688 unsigned long base = card->base;
689 u16 channel_setup, channel = port->channel,
690 shift_count = card->shift_count;
691 unsigned char flow_ctrl;
692
693 /* FIXME: Switch to new tty baud API */
694 baud = C_BAUD(tty);
695 if (baud & CBAUDEX) {
696 baud &= ~CBAUDEX;
697
698 /* if CBAUDEX bit is on and the baud is set to either 50 or 75
699 * then the card is programmed for 57.6Kbps or 115Kbps
700 * respectively.
701 */
702
703 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
704 if (baud < 1 || baud > 4)
705 tty->termios.c_cflag &= ~CBAUDEX;
706 else
707 baud += 15;
708 }
709 if (baud == 15) {
710
711 /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
712 * by the set_serial_info ioctl ... this is done by
713 * the 'setserial' utility.
714 */
715
716 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
717 baud++; /* 57.6 Kbps */
718 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
719 baud += 2; /* 115 Kbps */
720 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
721 baud += 3; /* 230 kbps*/
722 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
723 baud += 4; /* 460 kbps*/
724 }
725 if (linuxb_to_isib[baud] == -1) {
726 /* hang up */
727 drop_dtr(port);
728 return;
729 } else
730 raise_dtr(port);
731
732 if (WaitTillCardIsFree(base) == 0) {
733 outw(0x8000 | (channel << shift_count) | 0x03, base);
734 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
735 channel_setup = 0;
736 switch (C_CSIZE(tty)) {
737 case CS5:
738 channel_setup |= ISICOM_CS5;
739 break;
740 case CS6:
741 channel_setup |= ISICOM_CS6;
742 break;
743 case CS7:
744 channel_setup |= ISICOM_CS7;
745 break;
746 case CS8:
747 channel_setup |= ISICOM_CS8;
748 break;
749 }
750
751 if (C_CSTOPB(tty))
752 channel_setup |= ISICOM_2SB;
753 if (C_PARENB(tty)) {
754 channel_setup |= ISICOM_EVPAR;
755 if (C_PARODD(tty))
756 channel_setup |= ISICOM_ODPAR;
757 }
758 outw(channel_setup, base);
759 InterruptTheCard(base);
760 }
761 tty_port_set_check_carrier(&port->port, !C_CLOCAL(tty));
762
763 /* flow control settings ...*/
764 flow_ctrl = 0;
765 tty_port_set_cts_flow(&port->port, C_CRTSCTS(tty));
766 if (C_CRTSCTS(tty))
767 flow_ctrl |= ISICOM_CTSRTS;
768 if (I_IXON(tty))
769 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
770 if (I_IXOFF(tty))
771 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
772
773 if (WaitTillCardIsFree(base) == 0) {
774 outw(0x8000 | (channel << shift_count) | 0x04, base);
775 outw(flow_ctrl << 8 | 0x05, base);
776 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
777 InterruptTheCard(base);
778 }
779
780 /* rx enabled -> enable port for rx on the card */
781 if (C_CREAD(tty)) {
782 card->port_status |= (1 << channel);
783 outw(card->port_status, base + 0x02);
784 }
785}
786
787/* open et all */
788
789static inline void isicom_setup_board(struct isi_board *bp)
790{
791 int channel;
792 struct isi_port *port;
793
794 bp->count++;
795 if (!(bp->status & BOARD_INIT)) {
796 port = bp->ports;
797 for (channel = 0; channel < bp->port_count; channel++, port++)
798 drop_dtr_rts(port);
799 }
800 bp->status |= BOARD_ACTIVE | BOARD_INIT;
801}
802
803/* Activate and thus setup board are protected from races against shutdown
804 by the tty_port mutex */
805
806static int isicom_activate(struct tty_port *tport, struct tty_struct *tty)
807{
808 struct isi_port *port = container_of(tport, struct isi_port, port);
809 struct isi_board *card = port->card;
810 unsigned long flags;
811
812 if (tty_port_alloc_xmit_buf(tport) < 0)
813 return -ENOMEM;
814
815 spin_lock_irqsave(&card->card_lock, flags);
816 isicom_setup_board(card);
817
818 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
819
820 /* discard any residual data */
821 if (WaitTillCardIsFree(card->base) == 0) {
822 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
823 card->base);
824 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
825 InterruptTheCard(card->base);
826 }
827 isicom_config_port(tty);
828 spin_unlock_irqrestore(&card->card_lock, flags);
829
830 return 0;
831}
832
833static int isicom_carrier_raised(struct tty_port *port)
834{
835 struct isi_port *ip = container_of(port, struct isi_port, port);
836 return (ip->status & ISI_DCD)?1 : 0;
837}
838
839static struct tty_port *isicom_find_port(struct tty_struct *tty)
840{
841 struct isi_port *port;
842 struct isi_board *card;
843 unsigned int board;
844 int line = tty->index;
845
846 board = BOARD(line);
847 card = &isi_card[board];
848
849 if (!(card->status & FIRMWARE_LOADED))
850 return NULL;
851
852 /* open on a port greater than the port count for the card !!! */
853 if (line > ((board * 16) + card->port_count - 1))
854 return NULL;
855
856 port = &isi_ports[line];
857 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
858 return NULL;
859
860 return &port->port;
861}
862
863static int isicom_open(struct tty_struct *tty, struct file *filp)
864{
865 struct isi_port *port;
866 struct tty_port *tport;
867
868 tport = isicom_find_port(tty);
869 if (tport == NULL)
870 return -ENODEV;
871 port = container_of(tport, struct isi_port, port);
872
873 tty->driver_data = port;
874 return tty_port_open(tport, tty, filp);
875}
876
877/* close et all */
878
879/* card->lock HAS to be held */
880static void isicom_shutdown_port(struct isi_port *port)
881{
882 struct isi_board *card = port->card;
883
884 if (--card->count < 0) {
885 pr_debug("%s: bad board(0x%lx) count %d.\n",
886 __func__, card->base, card->count);
887 card->count = 0;
888 }
889 /* last port was closed, shutdown that board too */
890 if (!card->count)
891 card->status &= BOARD_ACTIVE;
892}
893
894static void isicom_flush_buffer(struct tty_struct *tty)
895{
896 struct isi_port *port = tty->driver_data;
897 struct isi_board *card = port->card;
898 unsigned long flags;
899
900 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
901 return;
902
903 spin_lock_irqsave(&card->card_lock, flags);
904 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
905 spin_unlock_irqrestore(&card->card_lock, flags);
906
907 tty_wakeup(tty);
908}
909
910static void isicom_shutdown(struct tty_port *port)
911{
912 struct isi_port *ip = container_of(port, struct isi_port, port);
913 struct isi_board *card = ip->card;
914 unsigned long flags;
915
916 /* indicate to the card that no more data can be received
917 on this port */
918 spin_lock_irqsave(&card->card_lock, flags);
919 card->port_status &= ~(1 << ip->channel);
920 outw(card->port_status, card->base + 0x02);
921 isicom_shutdown_port(ip);
922 spin_unlock_irqrestore(&card->card_lock, flags);
923 tty_port_free_xmit_buf(port);
924}
925
926static void isicom_close(struct tty_struct *tty, struct file *filp)
927{
928 struct isi_port *ip = tty->driver_data;
929 struct tty_port *port;
930
931 if (ip == NULL)
932 return;
933
934 port = &ip->port;
935 if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
936 return;
937 tty_port_close(port, tty, filp);
938}
939
940/* write et all */
941static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
942 int count)
943{
944 struct isi_port *port = tty->driver_data;
945 struct isi_board *card = port->card;
946 unsigned long flags;
947 int cnt, total = 0;
948
949 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
950 return 0;
951
952 spin_lock_irqsave(&card->card_lock, flags);
953
954 while (1) {
955 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
956 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
957 if (cnt <= 0)
958 break;
959
960 memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
961 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
962 - 1);
963 port->xmit_cnt += cnt;
964 buf += cnt;
965 count -= cnt;
966 total += cnt;
967 }
968 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
969 port->status |= ISI_TXOK;
970 spin_unlock_irqrestore(&card->card_lock, flags);
971 return total;
972}
973
974/* put_char et all */
975static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
976{
977 struct isi_port *port = tty->driver_data;
978 struct isi_board *card = port->card;
979 unsigned long flags;
980
981 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
982 return 0;
983
984 spin_lock_irqsave(&card->card_lock, flags);
985 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
986 spin_unlock_irqrestore(&card->card_lock, flags);
987 return 0;
988 }
989
990 port->port.xmit_buf[port->xmit_head++] = ch;
991 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
992 port->xmit_cnt++;
993 spin_unlock_irqrestore(&card->card_lock, flags);
994 return 1;
995}
996
997/* flush_chars et all */
998static void isicom_flush_chars(struct tty_struct *tty)
999{
1000 struct isi_port *port = tty->driver_data;
1001
1002 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1003 return;
1004
1005 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1006 !port->port.xmit_buf)
1007 return;
1008
1009 /* this tells the transmitter to consider this port for
1010 data output to the card ... that's the best we can do. */
1011 port->status |= ISI_TXOK;
1012}
1013
1014/* write_room et all */
1015static int isicom_write_room(struct tty_struct *tty)
1016{
1017 struct isi_port *port = tty->driver_data;
1018 int free;
1019
1020 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1021 return 0;
1022
1023 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1024 if (free < 0)
1025 free = 0;
1026 return free;
1027}
1028
1029/* chars_in_buffer et all */
1030static int isicom_chars_in_buffer(struct tty_struct *tty)
1031{
1032 struct isi_port *port = tty->driver_data;
1033 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1034 return 0;
1035 return port->xmit_cnt;
1036}
1037
1038/* ioctl et all */
1039static int isicom_send_break(struct tty_struct *tty, int length)
1040{
1041 struct isi_port *port = tty->driver_data;
1042 struct isi_board *card = port->card;
1043 unsigned long base = card->base;
1044
1045 if (length == -1)
1046 return -EOPNOTSUPP;
1047
1048 if (!lock_card(card))
1049 return -EINVAL;
1050
1051 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1052 outw((length & 0xff) << 8 | 0x00, base);
1053 outw((length & 0xff00u), base);
1054 InterruptTheCard(base);
1055
1056 unlock_card(card);
1057 return 0;
1058}
1059
1060static int isicom_tiocmget(struct tty_struct *tty)
1061{
1062 struct isi_port *port = tty->driver_data;
1063 /* just send the port status */
1064 u16 status = port->status;
1065
1066 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1067 return -ENODEV;
1068
1069 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1070 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1071 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1072 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1073 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1074 ((status & ISI_RI ) ? TIOCM_RI : 0);
1075}
1076
1077static int isicom_tiocmset(struct tty_struct *tty,
1078 unsigned int set, unsigned int clear)
1079{
1080 struct isi_port *port = tty->driver_data;
1081 unsigned long flags;
1082
1083 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1084 return -ENODEV;
1085
1086 spin_lock_irqsave(&port->card->card_lock, flags);
1087 if (set & TIOCM_RTS)
1088 raise_rts(port);
1089 if (set & TIOCM_DTR)
1090 raise_dtr(port);
1091
1092 if (clear & TIOCM_RTS)
1093 drop_rts(port);
1094 if (clear & TIOCM_DTR)
1095 drop_dtr(port);
1096 spin_unlock_irqrestore(&port->card->card_lock, flags);
1097
1098 return 0;
1099}
1100
1101static int isicom_set_serial_info(struct tty_struct *tty,
1102 struct serial_struct __user *info)
1103{
1104 struct isi_port *port = tty->driver_data;
1105 struct serial_struct newinfo;
1106 int reconfig_port;
1107
1108 if (copy_from_user(&newinfo, info, sizeof(newinfo)))
1109 return -EFAULT;
1110
1111 mutex_lock(&port->port.mutex);
1112 reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
1113 (newinfo.flags & ASYNC_SPD_MASK));
1114
1115 if (!capable(CAP_SYS_ADMIN)) {
1116 if ((newinfo.close_delay != port->port.close_delay) ||
1117 (newinfo.closing_wait != port->port.closing_wait) ||
1118 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1119 (port->port.flags & ~ASYNC_USR_MASK))) {
1120 mutex_unlock(&port->port.mutex);
1121 return -EPERM;
1122 }
1123 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1124 (newinfo.flags & ASYNC_USR_MASK));
1125 } else {
1126 port->port.close_delay = newinfo.close_delay;
1127 port->port.closing_wait = newinfo.closing_wait;
1128 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1129 (newinfo.flags & ASYNC_FLAGS));
1130 }
1131 if (reconfig_port) {
1132 unsigned long flags;
1133 spin_lock_irqsave(&port->card->card_lock, flags);
1134 isicom_config_port(tty);
1135 spin_unlock_irqrestore(&port->card->card_lock, flags);
1136 }
1137 mutex_unlock(&port->port.mutex);
1138 return 0;
1139}
1140
1141static int isicom_get_serial_info(struct isi_port *port,
1142 struct serial_struct __user *info)
1143{
1144 struct serial_struct out_info;
1145
1146 mutex_lock(&port->port.mutex);
1147 memset(&out_info, 0, sizeof(out_info));
1148/* out_info.type = ? */
1149 out_info.line = port - isi_ports;
1150 out_info.port = port->card->base;
1151 out_info.irq = port->card->irq;
1152 out_info.flags = port->port.flags;
1153/* out_info.baud_base = ? */
1154 out_info.close_delay = port->port.close_delay;
1155 out_info.closing_wait = port->port.closing_wait;
1156 mutex_unlock(&port->port.mutex);
1157 if (copy_to_user(info, &out_info, sizeof(out_info)))
1158 return -EFAULT;
1159 return 0;
1160}
1161
1162static int isicom_ioctl(struct tty_struct *tty,
1163 unsigned int cmd, unsigned long arg)
1164{
1165 struct isi_port *port = tty->driver_data;
1166 void __user *argp = (void __user *)arg;
1167
1168 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1169 return -ENODEV;
1170
1171 switch (cmd) {
1172 case TIOCGSERIAL:
1173 return isicom_get_serial_info(port, argp);
1174
1175 case TIOCSSERIAL:
1176 return isicom_set_serial_info(tty, argp);
1177
1178 default:
1179 return -ENOIOCTLCMD;
1180 }
1181 return 0;
1182}
1183
1184/* set_termios et all */
1185static void isicom_set_termios(struct tty_struct *tty,
1186 struct ktermios *old_termios)
1187{
1188 struct isi_port *port = tty->driver_data;
1189 unsigned long flags;
1190
1191 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1192 return;
1193
1194 if (tty->termios.c_cflag == old_termios->c_cflag &&
1195 tty->termios.c_iflag == old_termios->c_iflag)
1196 return;
1197
1198 spin_lock_irqsave(&port->card->card_lock, flags);
1199 isicom_config_port(tty);
1200 spin_unlock_irqrestore(&port->card->card_lock, flags);
1201
1202 if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
1203 tty->hw_stopped = 0;
1204 isicom_start(tty);
1205 }
1206}
1207
1208/* throttle et all */
1209static void isicom_throttle(struct tty_struct *tty)
1210{
1211 struct isi_port *port = tty->driver_data;
1212 struct isi_board *card = port->card;
1213
1214 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1215 return;
1216
1217 /* tell the card that this port cannot handle any more data for now */
1218 card->port_status &= ~(1 << port->channel);
1219 outw(card->port_status, card->base + 0x02);
1220}
1221
1222/* unthrottle et all */
1223static void isicom_unthrottle(struct tty_struct *tty)
1224{
1225 struct isi_port *port = tty->driver_data;
1226 struct isi_board *card = port->card;
1227
1228 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1229 return;
1230
1231 /* tell the card that this port is ready to accept more data */
1232 card->port_status |= (1 << port->channel);
1233 outw(card->port_status, card->base + 0x02);
1234}
1235
1236/* stop et all */
1237static void isicom_stop(struct tty_struct *tty)
1238{
1239 struct isi_port *port = tty->driver_data;
1240
1241 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1242 return;
1243
1244 /* this tells the transmitter not to consider this port for
1245 data output to the card. */
1246 port->status &= ~ISI_TXOK;
1247}
1248
1249/* start et all */
1250static void isicom_start(struct tty_struct *tty)
1251{
1252 struct isi_port *port = tty->driver_data;
1253
1254 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1255 return;
1256
1257 /* this tells the transmitter to consider this port for
1258 data output to the card. */
1259 port->status |= ISI_TXOK;
1260}
1261
1262static void isicom_hangup(struct tty_struct *tty)
1263{
1264 struct isi_port *port = tty->driver_data;
1265
1266 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1267 return;
1268 tty_port_hangup(&port->port);
1269}
1270
1271
1272/*
1273 * Driver init and deinit functions
1274 */
1275
1276static const struct tty_operations isicom_ops = {
1277 .open = isicom_open,
1278 .close = isicom_close,
1279 .write = isicom_write,
1280 .put_char = isicom_put_char,
1281 .flush_chars = isicom_flush_chars,
1282 .write_room = isicom_write_room,
1283 .chars_in_buffer = isicom_chars_in_buffer,
1284 .ioctl = isicom_ioctl,
1285 .set_termios = isicom_set_termios,
1286 .throttle = isicom_throttle,
1287 .unthrottle = isicom_unthrottle,
1288 .stop = isicom_stop,
1289 .start = isicom_start,
1290 .hangup = isicom_hangup,
1291 .flush_buffer = isicom_flush_buffer,
1292 .tiocmget = isicom_tiocmget,
1293 .tiocmset = isicom_tiocmset,
1294 .break_ctl = isicom_send_break,
1295};
1296
1297static const struct tty_port_operations isicom_port_ops = {
1298 .carrier_raised = isicom_carrier_raised,
1299 .dtr_rts = isicom_dtr_rts,
1300 .activate = isicom_activate,
1301 .shutdown = isicom_shutdown,
1302};
1303
1304static int reset_card(struct pci_dev *pdev,
1305 const unsigned int card, unsigned int *signature)
1306{
1307 struct isi_board *board = pci_get_drvdata(pdev);
1308 unsigned long base = board->base;
1309 unsigned int sig, portcount = 0;
1310 int retval = 0;
1311
1312 dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1313 base);
1314
1315 inw(base + 0x8);
1316
1317 msleep(10);
1318
1319 outw(0, base + 0x8); /* Reset */
1320
1321 msleep(1000);
1322
1323 sig = inw(base + 0x4) & 0xff;
1324
1325 if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1326 sig != 0xee) {
1327 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1328 "bad I/O Port Address 0x%lx).\n", card + 1, base);
1329 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1330 retval = -EIO;
1331 goto end;
1332 }
1333
1334 msleep(10);
1335
1336 portcount = inw(base + 0x2);
1337 if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1338 portcount != 8 && portcount != 16)) {
1339 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1340 card + 1);
1341 retval = -EIO;
1342 goto end;
1343 }
1344
1345 switch (sig) {
1346 case 0xa5:
1347 case 0xbb:
1348 case 0xdd:
1349 board->port_count = (portcount == 4) ? 4 : 8;
1350 board->shift_count = 12;
1351 break;
1352 case 0xcc:
1353 case 0xee:
1354 board->port_count = 16;
1355 board->shift_count = 11;
1356 break;
1357 }
1358 dev_info(&pdev->dev, "-Done\n");
1359 *signature = sig;
1360
1361end:
1362 return retval;
1363}
1364
1365static int load_firmware(struct pci_dev *pdev,
1366 const unsigned int index, const unsigned int signature)
1367{
1368 struct isi_board *board = pci_get_drvdata(pdev);
1369 const struct firmware *fw;
1370 unsigned long base = board->base;
1371 unsigned int a;
1372 u16 word_count, status;
1373 int retval = -EIO;
1374 char *name;
1375 u8 *data;
1376
1377 struct stframe {
1378 u16 addr;
1379 u16 count;
1380 u8 data[0];
1381 } *frame;
1382
1383 switch (signature) {
1384 case 0xa5:
1385 name = "isi608.bin";
1386 break;
1387 case 0xbb:
1388 name = "isi608em.bin";
1389 break;
1390 case 0xcc:
1391 name = "isi616em.bin";
1392 break;
1393 case 0xdd:
1394 name = "isi4608.bin";
1395 break;
1396 case 0xee:
1397 name = "isi4616.bin";
1398 break;
1399 default:
1400 dev_err(&pdev->dev, "Unknown signature.\n");
1401 goto end;
1402 }
1403
1404 retval = request_firmware(&fw, name, &pdev->dev);
1405 if (retval)
1406 goto end;
1407
1408 retval = -EIO;
1409
1410 for (frame = (struct stframe *)fw->data;
1411 frame < (struct stframe *)(fw->data + fw->size);
1412 frame = (struct stframe *)((u8 *)(frame + 1) +
1413 frame->count)) {
1414 if (WaitTillCardIsFree(base))
1415 goto errrelfw;
1416
1417 outw(0xf0, base); /* start upload sequence */
1418 outw(0x00, base);
1419 outw(frame->addr, base); /* lsb of address */
1420
1421 word_count = frame->count / 2 + frame->count % 2;
1422 outw(word_count, base);
1423 InterruptTheCard(base);
1424
1425 udelay(100); /* 0x2f */
1426
1427 if (WaitTillCardIsFree(base))
1428 goto errrelfw;
1429
1430 status = inw(base + 0x4);
1431 if (status != 0) {
1432 dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1433 "Address:0x%x\n"
1434 "Count:0x%x\n"
1435 "Status:0x%x\n",
1436 index + 1, frame->addr, frame->count, status);
1437 goto errrelfw;
1438 }
1439 outsw(base, frame->data, word_count);
1440
1441 InterruptTheCard(base);
1442
1443 udelay(50); /* 0x0f */
1444
1445 if (WaitTillCardIsFree(base))
1446 goto errrelfw;
1447
1448 status = inw(base + 0x4);
1449 if (status != 0) {
1450 dev_err(&pdev->dev, "Card%d got out of sync.Card "
1451 "Status:0x%x\n", index + 1, status);
1452 goto errrelfw;
1453 }
1454 }
1455
1456/* XXX: should we test it by reading it back and comparing with original like
1457 * in load firmware package? */
1458 for (frame = (struct stframe *)fw->data;
1459 frame < (struct stframe *)(fw->data + fw->size);
1460 frame = (struct stframe *)((u8 *)(frame + 1) +
1461 frame->count)) {
1462 if (WaitTillCardIsFree(base))
1463 goto errrelfw;
1464
1465 outw(0xf1, base); /* start download sequence */
1466 outw(0x00, base);
1467 outw(frame->addr, base); /* lsb of address */
1468
1469 word_count = (frame->count >> 1) + frame->count % 2;
1470 outw(word_count + 1, base);
1471 InterruptTheCard(base);
1472
1473 udelay(50); /* 0xf */
1474
1475 if (WaitTillCardIsFree(base))
1476 goto errrelfw;
1477
1478 status = inw(base + 0x4);
1479 if (status != 0) {
1480 dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1481 "Address:0x%x\n"
1482 "Count:0x%x\n"
1483 "Status: 0x%x\n",
1484 index + 1, frame->addr, frame->count, status);
1485 goto errrelfw;
1486 }
1487
1488 data = kmalloc(word_count * 2, GFP_KERNEL);
1489 if (data == NULL) {
1490 dev_err(&pdev->dev, "Card%d, firmware upload "
1491 "failed, not enough memory\n", index + 1);
1492 goto errrelfw;
1493 }
1494 inw(base);
1495 insw(base, data, word_count);
1496 InterruptTheCard(base);
1497
1498 for (a = 0; a < frame->count; a++)
1499 if (data[a] != frame->data[a]) {
1500 kfree(data);
1501 dev_err(&pdev->dev, "Card%d, firmware upload "
1502 "failed\n", index + 1);
1503 goto errrelfw;
1504 }
1505 kfree(data);
1506
1507 udelay(50); /* 0xf */
1508
1509 if (WaitTillCardIsFree(base))
1510 goto errrelfw;
1511
1512 status = inw(base + 0x4);
1513 if (status != 0) {
1514 dev_err(&pdev->dev, "Card%d verify got out of sync. "
1515 "Card Status:0x%x\n", index + 1, status);
1516 goto errrelfw;
1517 }
1518 }
1519
1520 /* xfer ctrl */
1521 if (WaitTillCardIsFree(base))
1522 goto errrelfw;
1523
1524 outw(0xf2, base);
1525 outw(0x800, base);
1526 outw(0x0, base);
1527 outw(0x0, base);
1528 InterruptTheCard(base);
1529 outw(0x0, base + 0x4); /* for ISI4608 cards */
1530
1531 board->status |= FIRMWARE_LOADED;
1532 retval = 0;
1533
1534errrelfw:
1535 release_firmware(fw);
1536end:
1537 return retval;
1538}
1539
1540/*
1541 * Insmod can set static symbols so keep these static
1542 */
1543static unsigned int card_count;
1544
1545static int isicom_probe(struct pci_dev *pdev,
1546 const struct pci_device_id *ent)
1547{
1548 unsigned int uninitialized_var(signature), index;
1549 int retval = -EPERM;
1550 struct isi_board *board = NULL;
1551
1552 if (card_count >= BOARD_COUNT)
1553 goto err;
1554
1555 retval = pci_enable_device(pdev);
1556 if (retval) {
1557 dev_err(&pdev->dev, "failed to enable\n");
1558 goto err;
1559 }
1560
1561 dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1562
1563 /* allot the first empty slot in the array */
1564 for (index = 0; index < BOARD_COUNT; index++) {
1565 if (isi_card[index].base == 0) {
1566 board = &isi_card[index];
1567 break;
1568 }
1569 }
1570 if (index == BOARD_COUNT) {
1571 retval = -ENODEV;
1572 goto err_disable;
1573 }
1574
1575 board->index = index;
1576 board->base = pci_resource_start(pdev, 3);
1577 board->irq = pdev->irq;
1578 card_count++;
1579
1580 pci_set_drvdata(pdev, board);
1581
1582 retval = pci_request_region(pdev, 3, ISICOM_NAME);
1583 if (retval) {
1584 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1585 "will be disabled.\n", board->base, board->base + 15,
1586 index + 1);
1587 retval = -EBUSY;
1588 goto errdec;
1589 }
1590
1591 retval = request_irq(board->irq, isicom_interrupt,
1592 IRQF_SHARED, ISICOM_NAME, board);
1593 if (retval < 0) {
1594 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1595 "Card%d will be disabled.\n", board->irq, index + 1);
1596 goto errunrr;
1597 }
1598
1599 retval = reset_card(pdev, index, &signature);
1600 if (retval < 0)
1601 goto errunri;
1602
1603 retval = load_firmware(pdev, index, signature);
1604 if (retval < 0)
1605 goto errunri;
1606
1607 for (index = 0; index < board->port_count; index++) {
1608 struct tty_port *tport = &board->ports[index].port;
1609 tty_port_init(tport);
1610 tport->ops = &isicom_port_ops;
1611 tport->close_delay = 50 * HZ/100;
1612 tport->closing_wait = 3000 * HZ/100;
1613 tty_port_register_device(tport, isicom_normal,
1614 board->index * 16 + index, &pdev->dev);
1615 }
1616
1617 return 0;
1618
1619errunri:
1620 free_irq(board->irq, board);
1621errunrr:
1622 pci_release_region(pdev, 3);
1623errdec:
1624 board->base = 0;
1625 card_count--;
1626err_disable:
1627 pci_disable_device(pdev);
1628err:
1629 return retval;
1630}
1631
1632static void isicom_remove(struct pci_dev *pdev)
1633{
1634 struct isi_board *board = pci_get_drvdata(pdev);
1635 unsigned int i;
1636
1637 for (i = 0; i < board->port_count; i++) {
1638 tty_unregister_device(isicom_normal, board->index * 16 + i);
1639 tty_port_destroy(&board->ports[i].port);
1640 }
1641
1642 free_irq(board->irq, board);
1643 pci_release_region(pdev, 3);
1644 board->base = 0;
1645 card_count--;
1646 pci_disable_device(pdev);
1647}
1648
1649static int __init isicom_init(void)
1650{
1651 int retval, idx, channel;
1652 struct isi_port *port;
1653
1654 for (idx = 0; idx < BOARD_COUNT; idx++) {
1655 port = &isi_ports[idx * 16];
1656 isi_card[idx].ports = port;
1657 spin_lock_init(&isi_card[idx].card_lock);
1658 for (channel = 0; channel < 16; channel++, port++) {
1659 port->magic = ISICOM_MAGIC;
1660 port->card = &isi_card[idx];
1661 port->channel = channel;
1662 port->status = 0;
1663 /* . . . */
1664 }
1665 isi_card[idx].base = 0;
1666 isi_card[idx].irq = 0;
1667 }
1668
1669 /* tty driver structure initialization */
1670 isicom_normal = alloc_tty_driver(PORT_COUNT);
1671 if (!isicom_normal) {
1672 retval = -ENOMEM;
1673 goto error;
1674 }
1675
1676 isicom_normal->name = "ttyM";
1677 isicom_normal->major = ISICOM_NMAJOR;
1678 isicom_normal->minor_start = 0;
1679 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1680 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1681 isicom_normal->init_termios = tty_std_termios;
1682 isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
1683 CLOCAL;
1684 isicom_normal->flags = TTY_DRIVER_REAL_RAW |
1685 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
1686 tty_set_operations(isicom_normal, &isicom_ops);
1687
1688 retval = tty_register_driver(isicom_normal);
1689 if (retval) {
1690 pr_debug("Couldn't register the dialin driver\n");
1691 goto err_puttty;
1692 }
1693
1694 retval = pci_register_driver(&isicom_driver);
1695 if (retval < 0) {
1696 pr_err("Unable to register pci driver.\n");
1697 goto err_unrtty;
1698 }
1699
1700 mod_timer(&tx, jiffies + 1);
1701
1702 return 0;
1703err_unrtty:
1704 tty_unregister_driver(isicom_normal);
1705err_puttty:
1706 put_tty_driver(isicom_normal);
1707error:
1708 return retval;
1709}
1710
1711static void __exit isicom_exit(void)
1712{
1713 del_timer_sync(&tx);
1714
1715 pci_unregister_driver(&isicom_driver);
1716 tty_unregister_driver(isicom_normal);
1717 put_tty_driver(isicom_normal);
1718}
1719
1720module_init(isicom_init);
1721module_exit(isicom_exit);
1722
1723MODULE_AUTHOR("MultiTech");
1724MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1725MODULE_LICENSE("GPL");
1726MODULE_FIRMWARE("isi608.bin");
1727MODULE_FIRMWARE("isi608em.bin");
1728MODULE_FIRMWARE("isi616em.bin");
1729MODULE_FIRMWARE("isi4608.bin");
1730MODULE_FIRMWARE("isi4616.bin");