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[deliverable/linux.git] / drivers / tty / isicom.c
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
150 static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
151 static void isicom_remove(struct pci_dev *);
152
153 static 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 };
165 MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
166
167 static struct pci_driver isicom_driver = {
168 .name = "isicom",
169 .id_table = isicom_pci_tbl,
170 .probe = isicom_probe,
171 .remove = isicom_remove
172 };
173
174 static int prev_card = 3; /* start servicing isi_card[0] */
175 static struct tty_driver *isicom_normal;
176
177 static void isicom_tx(unsigned long _data);
178 static void isicom_start(struct tty_struct *tty);
179
180 static DEFINE_TIMER(tx, isicom_tx, 0, 0);
181
182 /* baud index mappings from linux defns to isi */
183
184 static 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
188 struct 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
202 struct 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
214 static struct isi_board isi_card[BOARD_COUNT];
215 static 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
223 static 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
237 static 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
257 static 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 */
267 static 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 */
283 static 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 */
299 static 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 */
315 static 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
332 static 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 */
357 static 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
377 static 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
401 static 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 (!(port->port.flags & ASYNC_INITIALIZED) ||
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
502 put_unlock:
503 tty_kref_put(tty);
504 unlock:
505 spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
506 /* schedule another tx for hopefully in about 10ms */
507 sched_again:
508 mod_timer(&tx, jiffies + msecs_to_jiffies(10));
509 }
510
511 /*
512 * Main interrupt handler routine
513 */
514
515 static 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 (!(port->port.flags & ASYNC_INITIALIZED)) {
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 (port->port.flags & ASYNC_CHECK_CD) {
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
683 static 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 if (C_CLOCAL(tty))
762 port->port.flags &= ~ASYNC_CHECK_CD;
763 else
764 port->port.flags |= ASYNC_CHECK_CD;
765
766 /* flow control settings ...*/
767 flow_ctrl = 0;
768 port->port.flags &= ~ASYNC_CTS_FLOW;
769 if (C_CRTSCTS(tty)) {
770 port->port.flags |= ASYNC_CTS_FLOW;
771 flow_ctrl |= ISICOM_CTSRTS;
772 }
773 if (I_IXON(tty))
774 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
775 if (I_IXOFF(tty))
776 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
777
778 if (WaitTillCardIsFree(base) == 0) {
779 outw(0x8000 | (channel << shift_count) | 0x04, base);
780 outw(flow_ctrl << 8 | 0x05, base);
781 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
782 InterruptTheCard(base);
783 }
784
785 /* rx enabled -> enable port for rx on the card */
786 if (C_CREAD(tty)) {
787 card->port_status |= (1 << channel);
788 outw(card->port_status, base + 0x02);
789 }
790 }
791
792 /* open et all */
793
794 static inline void isicom_setup_board(struct isi_board *bp)
795 {
796 int channel;
797 struct isi_port *port;
798
799 bp->count++;
800 if (!(bp->status & BOARD_INIT)) {
801 port = bp->ports;
802 for (channel = 0; channel < bp->port_count; channel++, port++)
803 drop_dtr_rts(port);
804 }
805 bp->status |= BOARD_ACTIVE | BOARD_INIT;
806 }
807
808 /* Activate and thus setup board are protected from races against shutdown
809 by the tty_port mutex */
810
811 static int isicom_activate(struct tty_port *tport, struct tty_struct *tty)
812 {
813 struct isi_port *port = container_of(tport, struct isi_port, port);
814 struct isi_board *card = port->card;
815 unsigned long flags;
816
817 if (tty_port_alloc_xmit_buf(tport) < 0)
818 return -ENOMEM;
819
820 spin_lock_irqsave(&card->card_lock, flags);
821 isicom_setup_board(card);
822
823 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
824
825 /* discard any residual data */
826 if (WaitTillCardIsFree(card->base) == 0) {
827 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
828 card->base);
829 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
830 InterruptTheCard(card->base);
831 }
832 isicom_config_port(tty);
833 spin_unlock_irqrestore(&card->card_lock, flags);
834
835 return 0;
836 }
837
838 static int isicom_carrier_raised(struct tty_port *port)
839 {
840 struct isi_port *ip = container_of(port, struct isi_port, port);
841 return (ip->status & ISI_DCD)?1 : 0;
842 }
843
844 static struct tty_port *isicom_find_port(struct tty_struct *tty)
845 {
846 struct isi_port *port;
847 struct isi_board *card;
848 unsigned int board;
849 int line = tty->index;
850
851 board = BOARD(line);
852 card = &isi_card[board];
853
854 if (!(card->status & FIRMWARE_LOADED))
855 return NULL;
856
857 /* open on a port greater than the port count for the card !!! */
858 if (line > ((board * 16) + card->port_count - 1))
859 return NULL;
860
861 port = &isi_ports[line];
862 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
863 return NULL;
864
865 return &port->port;
866 }
867
868 static int isicom_open(struct tty_struct *tty, struct file *filp)
869 {
870 struct isi_port *port;
871 struct tty_port *tport;
872
873 tport = isicom_find_port(tty);
874 if (tport == NULL)
875 return -ENODEV;
876 port = container_of(tport, struct isi_port, port);
877
878 tty->driver_data = port;
879 return tty_port_open(tport, tty, filp);
880 }
881
882 /* close et all */
883
884 /* card->lock HAS to be held */
885 static void isicom_shutdown_port(struct isi_port *port)
886 {
887 struct isi_board *card = port->card;
888
889 if (--card->count < 0) {
890 pr_debug("%s: bad board(0x%lx) count %d.\n",
891 __func__, card->base, card->count);
892 card->count = 0;
893 }
894 /* last port was closed, shutdown that board too */
895 if (!card->count)
896 card->status &= BOARD_ACTIVE;
897 }
898
899 static void isicom_flush_buffer(struct tty_struct *tty)
900 {
901 struct isi_port *port = tty->driver_data;
902 struct isi_board *card = port->card;
903 unsigned long flags;
904
905 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
906 return;
907
908 spin_lock_irqsave(&card->card_lock, flags);
909 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
910 spin_unlock_irqrestore(&card->card_lock, flags);
911
912 tty_wakeup(tty);
913 }
914
915 static void isicom_shutdown(struct tty_port *port)
916 {
917 struct isi_port *ip = container_of(port, struct isi_port, port);
918 struct isi_board *card = ip->card;
919 unsigned long flags;
920
921 /* indicate to the card that no more data can be received
922 on this port */
923 spin_lock_irqsave(&card->card_lock, flags);
924 card->port_status &= ~(1 << ip->channel);
925 outw(card->port_status, card->base + 0x02);
926 isicom_shutdown_port(ip);
927 spin_unlock_irqrestore(&card->card_lock, flags);
928 tty_port_free_xmit_buf(port);
929 }
930
931 static void isicom_close(struct tty_struct *tty, struct file *filp)
932 {
933 struct isi_port *ip = tty->driver_data;
934 struct tty_port *port;
935
936 if (ip == NULL)
937 return;
938
939 port = &ip->port;
940 if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
941 return;
942 tty_port_close(port, tty, filp);
943 }
944
945 /* write et all */
946 static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
947 int count)
948 {
949 struct isi_port *port = tty->driver_data;
950 struct isi_board *card = port->card;
951 unsigned long flags;
952 int cnt, total = 0;
953
954 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
955 return 0;
956
957 spin_lock_irqsave(&card->card_lock, flags);
958
959 while (1) {
960 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
961 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
962 if (cnt <= 0)
963 break;
964
965 memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
966 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
967 - 1);
968 port->xmit_cnt += cnt;
969 buf += cnt;
970 count -= cnt;
971 total += cnt;
972 }
973 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
974 port->status |= ISI_TXOK;
975 spin_unlock_irqrestore(&card->card_lock, flags);
976 return total;
977 }
978
979 /* put_char et all */
980 static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
981 {
982 struct isi_port *port = tty->driver_data;
983 struct isi_board *card = port->card;
984 unsigned long flags;
985
986 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
987 return 0;
988
989 spin_lock_irqsave(&card->card_lock, flags);
990 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
991 spin_unlock_irqrestore(&card->card_lock, flags);
992 return 0;
993 }
994
995 port->port.xmit_buf[port->xmit_head++] = ch;
996 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
997 port->xmit_cnt++;
998 spin_unlock_irqrestore(&card->card_lock, flags);
999 return 1;
1000 }
1001
1002 /* flush_chars et all */
1003 static void isicom_flush_chars(struct tty_struct *tty)
1004 {
1005 struct isi_port *port = tty->driver_data;
1006
1007 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1008 return;
1009
1010 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1011 !port->port.xmit_buf)
1012 return;
1013
1014 /* this tells the transmitter to consider this port for
1015 data output to the card ... that's the best we can do. */
1016 port->status |= ISI_TXOK;
1017 }
1018
1019 /* write_room et all */
1020 static int isicom_write_room(struct tty_struct *tty)
1021 {
1022 struct isi_port *port = tty->driver_data;
1023 int free;
1024
1025 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1026 return 0;
1027
1028 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1029 if (free < 0)
1030 free = 0;
1031 return free;
1032 }
1033
1034 /* chars_in_buffer et all */
1035 static int isicom_chars_in_buffer(struct tty_struct *tty)
1036 {
1037 struct isi_port *port = tty->driver_data;
1038 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1039 return 0;
1040 return port->xmit_cnt;
1041 }
1042
1043 /* ioctl et all */
1044 static int isicom_send_break(struct tty_struct *tty, int length)
1045 {
1046 struct isi_port *port = tty->driver_data;
1047 struct isi_board *card = port->card;
1048 unsigned long base = card->base;
1049
1050 if (length == -1)
1051 return -EOPNOTSUPP;
1052
1053 if (!lock_card(card))
1054 return -EINVAL;
1055
1056 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1057 outw((length & 0xff) << 8 | 0x00, base);
1058 outw((length & 0xff00u), base);
1059 InterruptTheCard(base);
1060
1061 unlock_card(card);
1062 return 0;
1063 }
1064
1065 static int isicom_tiocmget(struct tty_struct *tty)
1066 {
1067 struct isi_port *port = tty->driver_data;
1068 /* just send the port status */
1069 u16 status = port->status;
1070
1071 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1072 return -ENODEV;
1073
1074 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1075 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1076 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1077 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1078 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1079 ((status & ISI_RI ) ? TIOCM_RI : 0);
1080 }
1081
1082 static int isicom_tiocmset(struct tty_struct *tty,
1083 unsigned int set, unsigned int clear)
1084 {
1085 struct isi_port *port = tty->driver_data;
1086 unsigned long flags;
1087
1088 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1089 return -ENODEV;
1090
1091 spin_lock_irqsave(&port->card->card_lock, flags);
1092 if (set & TIOCM_RTS)
1093 raise_rts(port);
1094 if (set & TIOCM_DTR)
1095 raise_dtr(port);
1096
1097 if (clear & TIOCM_RTS)
1098 drop_rts(port);
1099 if (clear & TIOCM_DTR)
1100 drop_dtr(port);
1101 spin_unlock_irqrestore(&port->card->card_lock, flags);
1102
1103 return 0;
1104 }
1105
1106 static int isicom_set_serial_info(struct tty_struct *tty,
1107 struct serial_struct __user *info)
1108 {
1109 struct isi_port *port = tty->driver_data;
1110 struct serial_struct newinfo;
1111 int reconfig_port;
1112
1113 if (copy_from_user(&newinfo, info, sizeof(newinfo)))
1114 return -EFAULT;
1115
1116 mutex_lock(&port->port.mutex);
1117 reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
1118 (newinfo.flags & ASYNC_SPD_MASK));
1119
1120 if (!capable(CAP_SYS_ADMIN)) {
1121 if ((newinfo.close_delay != port->port.close_delay) ||
1122 (newinfo.closing_wait != port->port.closing_wait) ||
1123 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1124 (port->port.flags & ~ASYNC_USR_MASK))) {
1125 mutex_unlock(&port->port.mutex);
1126 return -EPERM;
1127 }
1128 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1129 (newinfo.flags & ASYNC_USR_MASK));
1130 } else {
1131 port->port.close_delay = newinfo.close_delay;
1132 port->port.closing_wait = newinfo.closing_wait;
1133 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1134 (newinfo.flags & ASYNC_FLAGS));
1135 }
1136 if (reconfig_port) {
1137 unsigned long flags;
1138 spin_lock_irqsave(&port->card->card_lock, flags);
1139 isicom_config_port(tty);
1140 spin_unlock_irqrestore(&port->card->card_lock, flags);
1141 }
1142 mutex_unlock(&port->port.mutex);
1143 return 0;
1144 }
1145
1146 static int isicom_get_serial_info(struct isi_port *port,
1147 struct serial_struct __user *info)
1148 {
1149 struct serial_struct out_info;
1150
1151 mutex_lock(&port->port.mutex);
1152 memset(&out_info, 0, sizeof(out_info));
1153 /* out_info.type = ? */
1154 out_info.line = port - isi_ports;
1155 out_info.port = port->card->base;
1156 out_info.irq = port->card->irq;
1157 out_info.flags = port->port.flags;
1158 /* out_info.baud_base = ? */
1159 out_info.close_delay = port->port.close_delay;
1160 out_info.closing_wait = port->port.closing_wait;
1161 mutex_unlock(&port->port.mutex);
1162 if (copy_to_user(info, &out_info, sizeof(out_info)))
1163 return -EFAULT;
1164 return 0;
1165 }
1166
1167 static int isicom_ioctl(struct tty_struct *tty,
1168 unsigned int cmd, unsigned long arg)
1169 {
1170 struct isi_port *port = tty->driver_data;
1171 void __user *argp = (void __user *)arg;
1172
1173 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1174 return -ENODEV;
1175
1176 switch (cmd) {
1177 case TIOCGSERIAL:
1178 return isicom_get_serial_info(port, argp);
1179
1180 case TIOCSSERIAL:
1181 return isicom_set_serial_info(tty, argp);
1182
1183 default:
1184 return -ENOIOCTLCMD;
1185 }
1186 return 0;
1187 }
1188
1189 /* set_termios et all */
1190 static void isicom_set_termios(struct tty_struct *tty,
1191 struct ktermios *old_termios)
1192 {
1193 struct isi_port *port = tty->driver_data;
1194 unsigned long flags;
1195
1196 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1197 return;
1198
1199 if (tty->termios.c_cflag == old_termios->c_cflag &&
1200 tty->termios.c_iflag == old_termios->c_iflag)
1201 return;
1202
1203 spin_lock_irqsave(&port->card->card_lock, flags);
1204 isicom_config_port(tty);
1205 spin_unlock_irqrestore(&port->card->card_lock, flags);
1206
1207 if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
1208 tty->hw_stopped = 0;
1209 isicom_start(tty);
1210 }
1211 }
1212
1213 /* throttle et all */
1214 static void isicom_throttle(struct tty_struct *tty)
1215 {
1216 struct isi_port *port = tty->driver_data;
1217 struct isi_board *card = port->card;
1218
1219 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1220 return;
1221
1222 /* tell the card that this port cannot handle any more data for now */
1223 card->port_status &= ~(1 << port->channel);
1224 outw(card->port_status, card->base + 0x02);
1225 }
1226
1227 /* unthrottle et all */
1228 static void isicom_unthrottle(struct tty_struct *tty)
1229 {
1230 struct isi_port *port = tty->driver_data;
1231 struct isi_board *card = port->card;
1232
1233 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1234 return;
1235
1236 /* tell the card that this port is ready to accept more data */
1237 card->port_status |= (1 << port->channel);
1238 outw(card->port_status, card->base + 0x02);
1239 }
1240
1241 /* stop et all */
1242 static void isicom_stop(struct tty_struct *tty)
1243 {
1244 struct isi_port *port = tty->driver_data;
1245
1246 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1247 return;
1248
1249 /* this tells the transmitter not to consider this port for
1250 data output to the card. */
1251 port->status &= ~ISI_TXOK;
1252 }
1253
1254 /* start et all */
1255 static void isicom_start(struct tty_struct *tty)
1256 {
1257 struct isi_port *port = tty->driver_data;
1258
1259 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1260 return;
1261
1262 /* this tells the transmitter to consider this port for
1263 data output to the card. */
1264 port->status |= ISI_TXOK;
1265 }
1266
1267 static void isicom_hangup(struct tty_struct *tty)
1268 {
1269 struct isi_port *port = tty->driver_data;
1270
1271 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1272 return;
1273 tty_port_hangup(&port->port);
1274 }
1275
1276
1277 /*
1278 * Driver init and deinit functions
1279 */
1280
1281 static const struct tty_operations isicom_ops = {
1282 .open = isicom_open,
1283 .close = isicom_close,
1284 .write = isicom_write,
1285 .put_char = isicom_put_char,
1286 .flush_chars = isicom_flush_chars,
1287 .write_room = isicom_write_room,
1288 .chars_in_buffer = isicom_chars_in_buffer,
1289 .ioctl = isicom_ioctl,
1290 .set_termios = isicom_set_termios,
1291 .throttle = isicom_throttle,
1292 .unthrottle = isicom_unthrottle,
1293 .stop = isicom_stop,
1294 .start = isicom_start,
1295 .hangup = isicom_hangup,
1296 .flush_buffer = isicom_flush_buffer,
1297 .tiocmget = isicom_tiocmget,
1298 .tiocmset = isicom_tiocmset,
1299 .break_ctl = isicom_send_break,
1300 };
1301
1302 static const struct tty_port_operations isicom_port_ops = {
1303 .carrier_raised = isicom_carrier_raised,
1304 .dtr_rts = isicom_dtr_rts,
1305 .activate = isicom_activate,
1306 .shutdown = isicom_shutdown,
1307 };
1308
1309 static int reset_card(struct pci_dev *pdev,
1310 const unsigned int card, unsigned int *signature)
1311 {
1312 struct isi_board *board = pci_get_drvdata(pdev);
1313 unsigned long base = board->base;
1314 unsigned int sig, portcount = 0;
1315 int retval = 0;
1316
1317 dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1318 base);
1319
1320 inw(base + 0x8);
1321
1322 msleep(10);
1323
1324 outw(0, base + 0x8); /* Reset */
1325
1326 msleep(1000);
1327
1328 sig = inw(base + 0x4) & 0xff;
1329
1330 if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1331 sig != 0xee) {
1332 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1333 "bad I/O Port Address 0x%lx).\n", card + 1, base);
1334 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1335 retval = -EIO;
1336 goto end;
1337 }
1338
1339 msleep(10);
1340
1341 portcount = inw(base + 0x2);
1342 if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1343 portcount != 8 && portcount != 16)) {
1344 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1345 card + 1);
1346 retval = -EIO;
1347 goto end;
1348 }
1349
1350 switch (sig) {
1351 case 0xa5:
1352 case 0xbb:
1353 case 0xdd:
1354 board->port_count = (portcount == 4) ? 4 : 8;
1355 board->shift_count = 12;
1356 break;
1357 case 0xcc:
1358 case 0xee:
1359 board->port_count = 16;
1360 board->shift_count = 11;
1361 break;
1362 }
1363 dev_info(&pdev->dev, "-Done\n");
1364 *signature = sig;
1365
1366 end:
1367 return retval;
1368 }
1369
1370 static int load_firmware(struct pci_dev *pdev,
1371 const unsigned int index, const unsigned int signature)
1372 {
1373 struct isi_board *board = pci_get_drvdata(pdev);
1374 const struct firmware *fw;
1375 unsigned long base = board->base;
1376 unsigned int a;
1377 u16 word_count, status;
1378 int retval = -EIO;
1379 char *name;
1380 u8 *data;
1381
1382 struct stframe {
1383 u16 addr;
1384 u16 count;
1385 u8 data[0];
1386 } *frame;
1387
1388 switch (signature) {
1389 case 0xa5:
1390 name = "isi608.bin";
1391 break;
1392 case 0xbb:
1393 name = "isi608em.bin";
1394 break;
1395 case 0xcc:
1396 name = "isi616em.bin";
1397 break;
1398 case 0xdd:
1399 name = "isi4608.bin";
1400 break;
1401 case 0xee:
1402 name = "isi4616.bin";
1403 break;
1404 default:
1405 dev_err(&pdev->dev, "Unknown signature.\n");
1406 goto end;
1407 }
1408
1409 retval = request_firmware(&fw, name, &pdev->dev);
1410 if (retval)
1411 goto end;
1412
1413 retval = -EIO;
1414
1415 for (frame = (struct stframe *)fw->data;
1416 frame < (struct stframe *)(fw->data + fw->size);
1417 frame = (struct stframe *)((u8 *)(frame + 1) +
1418 frame->count)) {
1419 if (WaitTillCardIsFree(base))
1420 goto errrelfw;
1421
1422 outw(0xf0, base); /* start upload sequence */
1423 outw(0x00, base);
1424 outw(frame->addr, base); /* lsb of address */
1425
1426 word_count = frame->count / 2 + frame->count % 2;
1427 outw(word_count, base);
1428 InterruptTheCard(base);
1429
1430 udelay(100); /* 0x2f */
1431
1432 if (WaitTillCardIsFree(base))
1433 goto errrelfw;
1434
1435 status = inw(base + 0x4);
1436 if (status != 0) {
1437 dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1438 "Address:0x%x\n"
1439 "Count:0x%x\n"
1440 "Status:0x%x\n",
1441 index + 1, frame->addr, frame->count, status);
1442 goto errrelfw;
1443 }
1444 outsw(base, frame->data, word_count);
1445
1446 InterruptTheCard(base);
1447
1448 udelay(50); /* 0x0f */
1449
1450 if (WaitTillCardIsFree(base))
1451 goto errrelfw;
1452
1453 status = inw(base + 0x4);
1454 if (status != 0) {
1455 dev_err(&pdev->dev, "Card%d got out of sync.Card "
1456 "Status:0x%x\n", index + 1, status);
1457 goto errrelfw;
1458 }
1459 }
1460
1461 /* XXX: should we test it by reading it back and comparing with original like
1462 * in load firmware package? */
1463 for (frame = (struct stframe *)fw->data;
1464 frame < (struct stframe *)(fw->data + fw->size);
1465 frame = (struct stframe *)((u8 *)(frame + 1) +
1466 frame->count)) {
1467 if (WaitTillCardIsFree(base))
1468 goto errrelfw;
1469
1470 outw(0xf1, base); /* start download sequence */
1471 outw(0x00, base);
1472 outw(frame->addr, base); /* lsb of address */
1473
1474 word_count = (frame->count >> 1) + frame->count % 2;
1475 outw(word_count + 1, base);
1476 InterruptTheCard(base);
1477
1478 udelay(50); /* 0xf */
1479
1480 if (WaitTillCardIsFree(base))
1481 goto errrelfw;
1482
1483 status = inw(base + 0x4);
1484 if (status != 0) {
1485 dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1486 "Address:0x%x\n"
1487 "Count:0x%x\n"
1488 "Status: 0x%x\n",
1489 index + 1, frame->addr, frame->count, status);
1490 goto errrelfw;
1491 }
1492
1493 data = kmalloc(word_count * 2, GFP_KERNEL);
1494 if (data == NULL) {
1495 dev_err(&pdev->dev, "Card%d, firmware upload "
1496 "failed, not enough memory\n", index + 1);
1497 goto errrelfw;
1498 }
1499 inw(base);
1500 insw(base, data, word_count);
1501 InterruptTheCard(base);
1502
1503 for (a = 0; a < frame->count; a++)
1504 if (data[a] != frame->data[a]) {
1505 kfree(data);
1506 dev_err(&pdev->dev, "Card%d, firmware upload "
1507 "failed\n", index + 1);
1508 goto errrelfw;
1509 }
1510 kfree(data);
1511
1512 udelay(50); /* 0xf */
1513
1514 if (WaitTillCardIsFree(base))
1515 goto errrelfw;
1516
1517 status = inw(base + 0x4);
1518 if (status != 0) {
1519 dev_err(&pdev->dev, "Card%d verify got out of sync. "
1520 "Card Status:0x%x\n", index + 1, status);
1521 goto errrelfw;
1522 }
1523 }
1524
1525 /* xfer ctrl */
1526 if (WaitTillCardIsFree(base))
1527 goto errrelfw;
1528
1529 outw(0xf2, base);
1530 outw(0x800, base);
1531 outw(0x0, base);
1532 outw(0x0, base);
1533 InterruptTheCard(base);
1534 outw(0x0, base + 0x4); /* for ISI4608 cards */
1535
1536 board->status |= FIRMWARE_LOADED;
1537 retval = 0;
1538
1539 errrelfw:
1540 release_firmware(fw);
1541 end:
1542 return retval;
1543 }
1544
1545 /*
1546 * Insmod can set static symbols so keep these static
1547 */
1548 static unsigned int card_count;
1549
1550 static int isicom_probe(struct pci_dev *pdev,
1551 const struct pci_device_id *ent)
1552 {
1553 unsigned int uninitialized_var(signature), index;
1554 int retval = -EPERM;
1555 struct isi_board *board = NULL;
1556
1557 if (card_count >= BOARD_COUNT)
1558 goto err;
1559
1560 retval = pci_enable_device(pdev);
1561 if (retval) {
1562 dev_err(&pdev->dev, "failed to enable\n");
1563 goto err;
1564 }
1565
1566 dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1567
1568 /* allot the first empty slot in the array */
1569 for (index = 0; index < BOARD_COUNT; index++) {
1570 if (isi_card[index].base == 0) {
1571 board = &isi_card[index];
1572 break;
1573 }
1574 }
1575 if (index == BOARD_COUNT) {
1576 retval = -ENODEV;
1577 goto err_disable;
1578 }
1579
1580 board->index = index;
1581 board->base = pci_resource_start(pdev, 3);
1582 board->irq = pdev->irq;
1583 card_count++;
1584
1585 pci_set_drvdata(pdev, board);
1586
1587 retval = pci_request_region(pdev, 3, ISICOM_NAME);
1588 if (retval) {
1589 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1590 "will be disabled.\n", board->base, board->base + 15,
1591 index + 1);
1592 retval = -EBUSY;
1593 goto errdec;
1594 }
1595
1596 retval = request_irq(board->irq, isicom_interrupt,
1597 IRQF_SHARED, ISICOM_NAME, board);
1598 if (retval < 0) {
1599 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1600 "Card%d will be disabled.\n", board->irq, index + 1);
1601 goto errunrr;
1602 }
1603
1604 retval = reset_card(pdev, index, &signature);
1605 if (retval < 0)
1606 goto errunri;
1607
1608 retval = load_firmware(pdev, index, signature);
1609 if (retval < 0)
1610 goto errunri;
1611
1612 for (index = 0; index < board->port_count; index++) {
1613 struct tty_port *tport = &board->ports[index].port;
1614 tty_port_init(tport);
1615 tport->ops = &isicom_port_ops;
1616 tport->close_delay = 50 * HZ/100;
1617 tport->closing_wait = 3000 * HZ/100;
1618 tty_port_register_device(tport, isicom_normal,
1619 board->index * 16 + index, &pdev->dev);
1620 }
1621
1622 return 0;
1623
1624 errunri:
1625 free_irq(board->irq, board);
1626 errunrr:
1627 pci_release_region(pdev, 3);
1628 errdec:
1629 board->base = 0;
1630 card_count--;
1631 err_disable:
1632 pci_disable_device(pdev);
1633 err:
1634 return retval;
1635 }
1636
1637 static void isicom_remove(struct pci_dev *pdev)
1638 {
1639 struct isi_board *board = pci_get_drvdata(pdev);
1640 unsigned int i;
1641
1642 for (i = 0; i < board->port_count; i++) {
1643 tty_unregister_device(isicom_normal, board->index * 16 + i);
1644 tty_port_destroy(&board->ports[i].port);
1645 }
1646
1647 free_irq(board->irq, board);
1648 pci_release_region(pdev, 3);
1649 board->base = 0;
1650 card_count--;
1651 pci_disable_device(pdev);
1652 }
1653
1654 static int __init isicom_init(void)
1655 {
1656 int retval, idx, channel;
1657 struct isi_port *port;
1658
1659 for (idx = 0; idx < BOARD_COUNT; idx++) {
1660 port = &isi_ports[idx * 16];
1661 isi_card[idx].ports = port;
1662 spin_lock_init(&isi_card[idx].card_lock);
1663 for (channel = 0; channel < 16; channel++, port++) {
1664 port->magic = ISICOM_MAGIC;
1665 port->card = &isi_card[idx];
1666 port->channel = channel;
1667 port->status = 0;
1668 /* . . . */
1669 }
1670 isi_card[idx].base = 0;
1671 isi_card[idx].irq = 0;
1672 }
1673
1674 /* tty driver structure initialization */
1675 isicom_normal = alloc_tty_driver(PORT_COUNT);
1676 if (!isicom_normal) {
1677 retval = -ENOMEM;
1678 goto error;
1679 }
1680
1681 isicom_normal->name = "ttyM";
1682 isicom_normal->major = ISICOM_NMAJOR;
1683 isicom_normal->minor_start = 0;
1684 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1685 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1686 isicom_normal->init_termios = tty_std_termios;
1687 isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
1688 CLOCAL;
1689 isicom_normal->flags = TTY_DRIVER_REAL_RAW |
1690 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
1691 tty_set_operations(isicom_normal, &isicom_ops);
1692
1693 retval = tty_register_driver(isicom_normal);
1694 if (retval) {
1695 pr_debug("Couldn't register the dialin driver\n");
1696 goto err_puttty;
1697 }
1698
1699 retval = pci_register_driver(&isicom_driver);
1700 if (retval < 0) {
1701 pr_err("Unable to register pci driver.\n");
1702 goto err_unrtty;
1703 }
1704
1705 mod_timer(&tx, jiffies + 1);
1706
1707 return 0;
1708 err_unrtty:
1709 tty_unregister_driver(isicom_normal);
1710 err_puttty:
1711 put_tty_driver(isicom_normal);
1712 error:
1713 return retval;
1714 }
1715
1716 static void __exit isicom_exit(void)
1717 {
1718 del_timer_sync(&tx);
1719
1720 pci_unregister_driver(&isicom_driver);
1721 tty_unregister_driver(isicom_normal);
1722 put_tty_driver(isicom_normal);
1723 }
1724
1725 module_init(isicom_init);
1726 module_exit(isicom_exit);
1727
1728 MODULE_AUTHOR("MultiTech");
1729 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1730 MODULE_LICENSE("GPL");
1731 MODULE_FIRMWARE("isi608.bin");
1732 MODULE_FIRMWARE("isi608em.bin");
1733 MODULE_FIRMWARE("isi616em.bin");
1734 MODULE_FIRMWARE("isi4608.bin");
1735 MODULE_FIRMWARE("isi4616.bin");
Linux kernel - Deliverables
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