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aufs: tiny, fput last in au_do_vm_file_reset()
[zen-stable.git] / drivers / tty / isicom.c
blobe5c295ab5decd6fb7b7a093f861f7c0f1023f4a7
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.conf)
106 *
107 * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4
108 *
109 * Omit those entries for boards you don't have installed.
110 *
111 * TODO
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 #include <asm/system.h>
137
138 #include <linux/pci.h>
139
140 #include <linux/isicom.h>
141
142 #define InterruptTheCard(base) outw(0, (base) + 0xc)
143 #define ClearInterrupt(base) inw((base) + 0x0a)
144
145 #ifdef DEBUG
146 #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
147 #else
148 #define isicom_paranoia_check(a, b, c) 0
149 #endif
150
151 static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
152 static void __devexit isicom_remove(struct pci_dev *);
153
154 static struct pci_device_id isicom_pci_tbl[] = {
155 { PCI_DEVICE(VENDOR_ID, 0x2028) },
156 { PCI_DEVICE(VENDOR_ID, 0x2051) },
157 { PCI_DEVICE(VENDOR_ID, 0x2052) },
158 { PCI_DEVICE(VENDOR_ID, 0x2053) },
159 { PCI_DEVICE(VENDOR_ID, 0x2054) },
160 { PCI_DEVICE(VENDOR_ID, 0x2055) },
161 { PCI_DEVICE(VENDOR_ID, 0x2056) },
162 { PCI_DEVICE(VENDOR_ID, 0x2057) },
163 { PCI_DEVICE(VENDOR_ID, 0x2058) },
164 { 0 }
165 };
166 MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
167
168 static struct pci_driver isicom_driver = {
169 .name = "isicom",
170 .id_table = isicom_pci_tbl,
171 .probe = isicom_probe,
172 .remove = __devexit_p(isicom_remove)
173 };
174
175 static int prev_card = 3; /* start servicing isi_card[0] */
176 static struct tty_driver *isicom_normal;
177
178 static void isicom_tx(unsigned long _data);
179 static void isicom_start(struct tty_struct *tty);
180
181 static DEFINE_TIMER(tx, isicom_tx, 0, 0);
182
183 /* baud index mappings from linux defns to isi */
184
185 static signed char linuxb_to_isib[] = {
186 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
187 };
188
189 struct isi_board {
190 unsigned long base;
191 int irq;
192 unsigned char port_count;
193 unsigned short status;
194 unsigned short port_status; /* each bit for each port */
195 unsigned short shift_count;
196 struct isi_port *ports;
197 signed char count;
198 spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
199 unsigned long flags;
200 unsigned int index;
201 };
202
203 struct isi_port {
204 unsigned short magic;
205 struct tty_port port;
206 u16 channel;
207 u16 status;
208 struct isi_board *card;
209 unsigned char *xmit_buf;
210 int xmit_head;
211 int xmit_tail;
212 int xmit_cnt;
213 };
214
215 static struct isi_board isi_card[BOARD_COUNT];
216 static struct isi_port isi_ports[PORT_COUNT];
217
218 /*
219 * Locking functions for card level locking. We need to own both
220 * the kernel lock for the card and have the card in a position that
221 * it wants to talk.
222 */
223
224 static inline int WaitTillCardIsFree(unsigned long base)
225 {
226 unsigned int count = 0;
227 unsigned int a = in_atomic(); /* do we run under spinlock? */
228
229 while (!(inw(base + 0xe) & 0x1) && count++ < 100)
230 if (a)
231 mdelay(1);
232 else
233 msleep(1);
234
235 return !(inw(base + 0xe) & 0x1);
236 }
237
238 static int lock_card(struct isi_board *card)
239 {
240 unsigned long base = card->base;
241 unsigned int retries, a;
242
243 for (retries = 0; retries < 10; retries++) {
244 spin_lock_irqsave(&card->card_lock, card->flags);
245 for (a = 0; a < 10; a++) {
246 if (inw(base + 0xe) & 0x1)
247 return 1;
248 udelay(10);
249 }
250 spin_unlock_irqrestore(&card->card_lock, card->flags);
251 msleep(10);
252 }
253 pr_warning("Failed to lock Card (0x%lx)\n", card->base);
254
255 return 0; /* Failed to acquire the card! */
256 }
257
258 static void unlock_card(struct isi_board *card)
259 {
260 spin_unlock_irqrestore(&card->card_lock, card->flags);
261 }
262
263 /*
264 * ISI Card specific ops ...
265 */
266
267 /* card->lock HAS to be held */
268 static void raise_dtr(struct isi_port *port)
269 {
270 struct isi_board *card = port->card;
271 unsigned long base = card->base;
272 u16 channel = port->channel;
273
274 if (WaitTillCardIsFree(base))
275 return;
276
277 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
278 outw(0x0504, base);
279 InterruptTheCard(base);
280 port->status |= ISI_DTR;
281 }
282
283 /* card->lock HAS to be held */
284 static inline void drop_dtr(struct isi_port *port)
285 {
286 struct isi_board *card = port->card;
287 unsigned long base = card->base;
288 u16 channel = port->channel;
289
290 if (WaitTillCardIsFree(base))
291 return;
292
293 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
294 outw(0x0404, base);
295 InterruptTheCard(base);
296 port->status &= ~ISI_DTR;
297 }
298
299 /* card->lock HAS to be held */
300 static inline void raise_rts(struct isi_port *port)
301 {
302 struct isi_board *card = port->card;
303 unsigned long base = card->base;
304 u16 channel = port->channel;
305
306 if (WaitTillCardIsFree(base))
307 return;
308
309 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
310 outw(0x0a04, base);
311 InterruptTheCard(base);
312 port->status |= ISI_RTS;
313 }
314
315 /* card->lock HAS to be held */
316 static inline void drop_rts(struct isi_port *port)
317 {
318 struct isi_board *card = port->card;
319 unsigned long base = card->base;
320 u16 channel = port->channel;
321
322 if (WaitTillCardIsFree(base))
323 return;
324
325 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
326 outw(0x0804, base);
327 InterruptTheCard(base);
328 port->status &= ~ISI_RTS;
329 }
330
331 /* card->lock MUST NOT be held */
332
333 static void isicom_dtr_rts(struct tty_port *port, int on)
334 {
335 struct isi_port *ip = container_of(port, struct isi_port, port);
336 struct isi_board *card = ip->card;
337 unsigned long base = card->base;
338 u16 channel = ip->channel;
339
340 if (!lock_card(card))
341 return;
342
343 if (on) {
344 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
345 outw(0x0f04, base);
346 InterruptTheCard(base);
347 ip->status |= (ISI_DTR | ISI_RTS);
348 } else {
349 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
350 outw(0x0C04, base);
351 InterruptTheCard(base);
352 ip->status &= ~(ISI_DTR | ISI_RTS);
353 }
354 unlock_card(card);
355 }
356
357 /* card->lock HAS to be held */
358 static void drop_dtr_rts(struct isi_port *port)
359 {
360 struct isi_board *card = port->card;
361 unsigned long base = card->base;
362 u16 channel = port->channel;
363
364 if (WaitTillCardIsFree(base))
365 return;
366
367 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
368 outw(0x0c04, base);
369 InterruptTheCard(base);
370 port->status &= ~(ISI_RTS | ISI_DTR);
371 }
372
373 /*
374 * ISICOM Driver specific routines ...
375 *
376 */
377
378 static inline int __isicom_paranoia_check(struct isi_port const *port,
379 char *name, const char *routine)
380 {
381 if (!port) {
382 pr_warning("Warning: bad isicom magic for dev %s in %s.\n",
383 name, routine);
384 return 1;
385 }
386 if (port->magic != ISICOM_MAGIC) {
387 pr_warning("Warning: NULL isicom port for dev %s in %s.\n",
388 name, routine);
389 return 1;
390 }
391
392 return 0;
393 }
394
395 /*
396 * Transmitter.
397 *
398 * We shovel data into the card buffers on a regular basis. The card
399 * will do the rest of the work for us.
400 */
401
402 static void isicom_tx(unsigned long _data)
403 {
404 unsigned long flags, base;
405 unsigned int retries;
406 short count = (BOARD_COUNT-1), card;
407 short txcount, wrd, residue, word_count, cnt;
408 struct isi_port *port;
409 struct tty_struct *tty;
410
411 /* find next active board */
412 card = (prev_card + 1) & 0x0003;
413 while (count-- > 0) {
414 if (isi_card[card].status & BOARD_ACTIVE)
415 break;
416 card = (card + 1) & 0x0003;
417 }
418 if (!(isi_card[card].status & BOARD_ACTIVE))
419 goto sched_again;
420
421 prev_card = card;
422
423 count = isi_card[card].port_count;
424 port = isi_card[card].ports;
425 base = isi_card[card].base;
426
427 spin_lock_irqsave(&isi_card[card].card_lock, flags);
428 for (retries = 0; retries < 100; retries++) {
429 if (inw(base + 0xe) & 0x1)
430 break;
431 udelay(2);
432 }
433 if (retries >= 100)
434 goto unlock;
435
436 tty = tty_port_tty_get(&port->port);
437 if (tty == NULL)
438 goto put_unlock;
439
440 for (; count > 0; count--, port++) {
441 /* port not active or tx disabled to force flow control */
442 if (!(port->port.flags & ASYNC_INITIALIZED) ||
443 !(port->status & ISI_TXOK))
444 continue;
445
446 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
447 if (txcount <= 0 || tty->stopped || tty->hw_stopped)
448 continue;
449
450 if (!(inw(base + 0x02) & (1 << port->channel)))
451 continue;
452
453 pr_debug("txing %d bytes, port%d.\n",
454 txcount, port->channel + 1);
455 outw((port->channel << isi_card[card].shift_count) | txcount,
456 base);
457 residue = NO;
458 wrd = 0;
459 while (1) {
460 cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
461 - port->xmit_tail));
462 if (residue == YES) {
463 residue = NO;
464 if (cnt > 0) {
465 wrd |= (port->port.xmit_buf[port->xmit_tail]
466 << 8);
467 port->xmit_tail = (port->xmit_tail + 1)
468 & (SERIAL_XMIT_SIZE - 1);
469 port->xmit_cnt--;
470 txcount--;
471 cnt--;
472 outw(wrd, base);
473 } else {
474 outw(wrd, base);
475 break;
476 }
477 }
478 if (cnt <= 0)
479 break;
480 word_count = cnt >> 1;
481 outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
482 port->xmit_tail = (port->xmit_tail
483 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
484 txcount -= (word_count << 1);
485 port->xmit_cnt -= (word_count << 1);
486 if (cnt & 0x0001) {
487 residue = YES;
488 wrd = port->port.xmit_buf[port->xmit_tail];
489 port->xmit_tail = (port->xmit_tail + 1)
490 & (SERIAL_XMIT_SIZE - 1);
491 port->xmit_cnt--;
492 txcount--;
493 }
494 }
495
496 InterruptTheCard(base);
497 if (port->xmit_cnt <= 0)
498 port->status &= ~ISI_TXOK;
499 if (port->xmit_cnt <= WAKEUP_CHARS)
500 tty_wakeup(tty);
501 }
502
503 put_unlock:
504 tty_kref_put(tty);
505 unlock:
506 spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
507 /* schedule another tx for hopefully in about 10ms */
508 sched_again:
509 mod_timer(&tx, jiffies + msecs_to_jiffies(10));
510 }
511
512 /*
513 * Main interrupt handler routine
514 */
515
516 static irqreturn_t isicom_interrupt(int irq, void *dev_id)
517 {
518 struct isi_board *card = dev_id;
519 struct isi_port *port;
520 struct tty_struct *tty;
521 unsigned long base;
522 u16 header, word_count, count, channel;
523 short byte_count;
524 unsigned char *rp;
525
526 if (!card || !(card->status & FIRMWARE_LOADED))
527 return IRQ_NONE;
528
529 base = card->base;
530
531 /* did the card interrupt us? */
532 if (!(inw(base + 0x0e) & 0x02))
533 return IRQ_NONE;
534
535 spin_lock(&card->card_lock);
536
537 /*
538 * disable any interrupts from the PCI card and lower the
539 * interrupt line
540 */
541 outw(0x8000, base+0x04);
542 ClearInterrupt(base);
543
544 inw(base); /* get the dummy word out */
545 header = inw(base);
546 channel = (header & 0x7800) >> card->shift_count;
547 byte_count = header & 0xff;
548
549 if (channel + 1 > card->port_count) {
550 pr_warning("%s(0x%lx): %d(channel) > port_count.\n",
551 __func__, base, channel+1);
552 outw(0x0000, base+0x04); /* enable interrupts */
553 spin_unlock(&card->card_lock);
554 return IRQ_HANDLED;
555 }
556 port = card->ports + channel;
557 if (!(port->port.flags & ASYNC_INITIALIZED)) {
558 outw(0x0000, base+0x04); /* enable interrupts */
559 spin_unlock(&card->card_lock);
560 return IRQ_HANDLED;
561 }
562
563 tty = tty_port_tty_get(&port->port);
564 if (tty == NULL) {
565 word_count = byte_count >> 1;
566 while (byte_count > 1) {
567 inw(base);
568 byte_count -= 2;
569 }
570 if (byte_count & 0x01)
571 inw(base);
572 outw(0x0000, base+0x04); /* enable interrupts */
573 spin_unlock(&card->card_lock);
574 return IRQ_HANDLED;
575 }
576
577 if (header & 0x8000) { /* Status Packet */
578 header = inw(base);
579 switch (header & 0xff) {
580 case 0: /* Change in EIA signals */
581 if (port->port.flags & ASYNC_CHECK_CD) {
582 if (port->status & ISI_DCD) {
583 if (!(header & ISI_DCD)) {
584 /* Carrier has been lost */
585 pr_debug("%s: DCD->low.\n",
586 __func__);
587 port->status &= ~ISI_DCD;
588 tty_hangup(tty);
589 }
590 } else if (header & ISI_DCD) {
591 /* Carrier has been detected */
592 pr_debug("%s: DCD->high.\n",
593 __func__);
594 port->status |= ISI_DCD;
595 wake_up_interruptible(&port->port.open_wait);
596 }
597 } else {
598 if (header & ISI_DCD)
599 port->status |= ISI_DCD;
600 else
601 port->status &= ~ISI_DCD;
602 }
603
604 if (port->port.flags & ASYNC_CTS_FLOW) {
605 if (tty->hw_stopped) {
606 if (header & ISI_CTS) {
607 port->port.tty->hw_stopped = 0;
608 /* start tx ing */
609 port->status |= (ISI_TXOK
610 | ISI_CTS);
611 tty_wakeup(tty);
612 }
613 } else if (!(header & ISI_CTS)) {
614 tty->hw_stopped = 1;
615 /* stop tx ing */
616 port->status &= ~(ISI_TXOK | ISI_CTS);
617 }
618 } else {
619 if (header & ISI_CTS)
620 port->status |= ISI_CTS;
621 else
622 port->status &= ~ISI_CTS;
623 }
624
625 if (header & ISI_DSR)
626 port->status |= ISI_DSR;
627 else
628 port->status &= ~ISI_DSR;
629
630 if (header & ISI_RI)
631 port->status |= ISI_RI;
632 else
633 port->status &= ~ISI_RI;
634
635 break;
636
637 case 1: /* Received Break !!! */
638 tty_insert_flip_char(tty, 0, TTY_BREAK);
639 if (port->port.flags & ASYNC_SAK)
640 do_SAK(tty);
641 tty_flip_buffer_push(tty);
642 break;
643
644 case 2: /* Statistics */
645 pr_debug("%s: stats!!!\n", __func__);
646 break;
647
648 default:
649 pr_debug("%s: Unknown code in status packet.\n",
650 __func__);
651 break;
652 }
653 } else { /* Data Packet */
654
655 count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
656 pr_debug("%s: Can rx %d of %d bytes.\n",
657 __func__, count, byte_count);
658 word_count = count >> 1;
659 insw(base, rp, word_count);
660 byte_count -= (word_count << 1);
661 if (count & 0x0001) {
662 tty_insert_flip_char(tty, inw(base) & 0xff,
663 TTY_NORMAL);
664 byte_count -= 2;
665 }
666 if (byte_count > 0) {
667 pr_debug("%s(0x%lx:%d): Flip buffer overflow! dropping bytes...\n",
668 __func__, base, channel + 1);
669 /* drain out unread xtra data */
670 while (byte_count > 0) {
671 inw(base);
672 byte_count -= 2;
673 }
674 }
675 tty_flip_buffer_push(tty);
676 }
677 outw(0x0000, base+0x04); /* enable interrupts */
678 spin_unlock(&card->card_lock);
679 tty_kref_put(tty);
680
681 return IRQ_HANDLED;
682 }
683
684 static void isicom_config_port(struct tty_struct *tty)
685 {
686 struct isi_port *port = tty->driver_data;
687 struct isi_board *card = port->card;
688 unsigned long baud;
689 unsigned long base = card->base;
690 u16 channel_setup, channel = port->channel,
691 shift_count = card->shift_count;
692 unsigned char flow_ctrl;
693
694 /* FIXME: Switch to new tty baud API */
695 baud = C_BAUD(tty);
696 if (baud & CBAUDEX) {
697 baud &= ~CBAUDEX;
698
699 /* if CBAUDEX bit is on and the baud is set to either 50 or 75
700 * then the card is programmed for 57.6Kbps or 115Kbps
701 * respectively.
702 */
703
704 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
705 if (baud < 1 || baud > 4)
706 tty->termios->c_cflag &= ~CBAUDEX;
707 else
708 baud += 15;
709 }
710 if (baud == 15) {
711
712 /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
713 * by the set_serial_info ioctl ... this is done by
714 * the 'setserial' utility.
715 */
716
717 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
718 baud++; /* 57.6 Kbps */
719 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
720 baud += 2; /* 115 Kbps */
721 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
722 baud += 3; /* 230 kbps*/
723 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
724 baud += 4; /* 460 kbps*/
725 }
726 if (linuxb_to_isib[baud] == -1) {
727 /* hang up */
728 drop_dtr(port);
729 return;
730 } else
731 raise_dtr(port);
732
733 if (WaitTillCardIsFree(base) == 0) {
734 outw(0x8000 | (channel << shift_count) | 0x03, base);
735 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
736 channel_setup = 0;
737 switch (C_CSIZE(tty)) {
738 case CS5:
739 channel_setup |= ISICOM_CS5;
740 break;
741 case CS6:
742 channel_setup |= ISICOM_CS6;
743 break;
744 case CS7:
745 channel_setup |= ISICOM_CS7;
746 break;
747 case CS8:
748 channel_setup |= ISICOM_CS8;
749 break;
750 }
751
752 if (C_CSTOPB(tty))
753 channel_setup |= ISICOM_2SB;
754 if (C_PARENB(tty)) {
755 channel_setup |= ISICOM_EVPAR;
756 if (C_PARODD(tty))
757 channel_setup |= ISICOM_ODPAR;
758 }
759 outw(channel_setup, base);
760 InterruptTheCard(base);
761 }
762 if (C_CLOCAL(tty))
763 port->port.flags &= ~ASYNC_CHECK_CD;
764 else
765 port->port.flags |= ASYNC_CHECK_CD;
766
767 /* flow control settings ...*/
768 flow_ctrl = 0;
769 port->port.flags &= ~ASYNC_CTS_FLOW;
770 if (C_CRTSCTS(tty)) {
771 port->port.flags |= ASYNC_CTS_FLOW;
772 flow_ctrl |= ISICOM_CTSRTS;
773 }
774 if (I_IXON(tty))
775 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
776 if (I_IXOFF(tty))
777 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
778
779 if (WaitTillCardIsFree(base) == 0) {
780 outw(0x8000 | (channel << shift_count) | 0x04, base);
781 outw(flow_ctrl << 8 | 0x05, base);
782 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
783 InterruptTheCard(base);
784 }
785
786 /* rx enabled -> enable port for rx on the card */
787 if (C_CREAD(tty)) {
788 card->port_status |= (1 << channel);
789 outw(card->port_status, base + 0x02);
790 }
791 }
792
793 /* open et all */
794
795 static inline void isicom_setup_board(struct isi_board *bp)
796 {
797 int channel;
798 struct isi_port *port;
799
800 bp->count++;
801 if (!(bp->status & BOARD_INIT)) {
802 port = bp->ports;
803 for (channel = 0; channel < bp->port_count; channel++, port++)
804 drop_dtr_rts(port);
805 }
806 bp->status |= BOARD_ACTIVE | BOARD_INIT;
807 }
808
809 /* Activate and thus setup board are protected from races against shutdown
810 by the tty_port mutex */
811
812 static int isicom_activate(struct tty_port *tport, struct tty_struct *tty)
813 {
814 struct isi_port *port = container_of(tport, struct isi_port, port);
815 struct isi_board *card = port->card;
816 unsigned long flags;
817
818 if (tty_port_alloc_xmit_buf(tport) < 0)
819 return -ENOMEM;
820
821 spin_lock_irqsave(&card->card_lock, flags);
822 isicom_setup_board(card);
823
824 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
825
826 /* discard any residual data */
827 if (WaitTillCardIsFree(card->base) == 0) {
828 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
829 card->base);
830 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
831 InterruptTheCard(card->base);
832 }
833 isicom_config_port(tty);
834 spin_unlock_irqrestore(&card->card_lock, flags);
835
836 return 0;
837 }
838
839 static int isicom_carrier_raised(struct tty_port *port)
840 {
841 struct isi_port *ip = container_of(port, struct isi_port, port);
842 return (ip->status & ISI_DCD)?1 : 0;
843 }
844
845 static struct tty_port *isicom_find_port(struct tty_struct *tty)
846 {
847 struct isi_port *port;
848 struct isi_board *card;
849 unsigned int board;
850 int line = tty->index;
851
852 if (line < 0 || line > PORT_COUNT-1)
853 return NULL;
854 board = BOARD(line);
855 card = &isi_card[board];
856
857 if (!(card->status & FIRMWARE_LOADED))
858 return NULL;
859
860 /* open on a port greater than the port count for the card !!! */
861 if (line > ((board * 16) + card->port_count - 1))
862 return NULL;
863
864 port = &isi_ports[line];
865 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
866 return NULL;
867
868 return &port->port;
869 }
870
871 static int isicom_open(struct tty_struct *tty, struct file *filp)
872 {
873 struct isi_port *port;
874 struct tty_port *tport;
875
876 tport = isicom_find_port(tty);
877 if (tport == NULL)
878 return -ENODEV;
879 port = container_of(tport, struct isi_port, port);
880
881 tty->driver_data = port;
882 return tty_port_open(tport, tty, filp);
883 }
884
885 /* close et all */
886
887 /* card->lock HAS to be held */
888 static void isicom_shutdown_port(struct isi_port *port)
889 {
890 struct isi_board *card = port->card;
891
892 if (--card->count < 0) {
893 pr_debug("%s: bad board(0x%lx) count %d.\n",
894 __func__, card->base, card->count);
895 card->count = 0;
896 }
897 /* last port was closed, shutdown that board too */
898 if (!card->count)
899 card->status &= BOARD_ACTIVE;
900 }
901
902 static void isicom_flush_buffer(struct tty_struct *tty)
903 {
904 struct isi_port *port = tty->driver_data;
905 struct isi_board *card = port->card;
906 unsigned long flags;
907
908 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
909 return;
910
911 spin_lock_irqsave(&card->card_lock, flags);
912 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
913 spin_unlock_irqrestore(&card->card_lock, flags);
914
915 tty_wakeup(tty);
916 }
917
918 static void isicom_shutdown(struct tty_port *port)
919 {
920 struct isi_port *ip = container_of(port, struct isi_port, port);
921 struct isi_board *card = ip->card;
922 unsigned long flags;
923
924 /* indicate to the card that no more data can be received
925 on this port */
926 spin_lock_irqsave(&card->card_lock, flags);
927 card->port_status &= ~(1 << ip->channel);
928 outw(card->port_status, card->base + 0x02);
929 isicom_shutdown_port(ip);
930 spin_unlock_irqrestore(&card->card_lock, flags);
931 tty_port_free_xmit_buf(port);
932 }
933
934 static void isicom_close(struct tty_struct *tty, struct file *filp)
935 {
936 struct isi_port *ip = tty->driver_data;
937 struct tty_port *port;
938
939 if (ip == NULL)
940 return;
941
942 port = &ip->port;
943 if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
944 return;
945 tty_port_close(port, tty, filp);
946 }
947
948 /* write et all */
949 static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
950 int count)
951 {
952 struct isi_port *port = tty->driver_data;
953 struct isi_board *card = port->card;
954 unsigned long flags;
955 int cnt, total = 0;
956
957 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
958 return 0;
959
960 spin_lock_irqsave(&card->card_lock, flags);
961
962 while (1) {
963 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
964 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
965 if (cnt <= 0)
966 break;
967
968 memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
969 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
970 - 1);
971 port->xmit_cnt += cnt;
972 buf += cnt;
973 count -= cnt;
974 total += cnt;
975 }
976 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
977 port->status |= ISI_TXOK;
978 spin_unlock_irqrestore(&card->card_lock, flags);
979 return total;
980 }
981
982 /* put_char et all */
983 static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
984 {
985 struct isi_port *port = tty->driver_data;
986 struct isi_board *card = port->card;
987 unsigned long flags;
988
989 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
990 return 0;
991
992 spin_lock_irqsave(&card->card_lock, flags);
993 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
994 spin_unlock_irqrestore(&card->card_lock, flags);
995 return 0;
996 }
997
998 port->port.xmit_buf[port->xmit_head++] = ch;
999 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
1000 port->xmit_cnt++;
1001 spin_unlock_irqrestore(&card->card_lock, flags);
1002 return 1;
1003 }
1004
1005 /* flush_chars et all */
1006 static void isicom_flush_chars(struct tty_struct *tty)
1007 {
1008 struct isi_port *port = tty->driver_data;
1009
1010 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1011 return;
1012
1013 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1014 !port->port.xmit_buf)
1015 return;
1016
1017 /* this tells the transmitter to consider this port for
1018 data output to the card ... that's the best we can do. */
1019 port->status |= ISI_TXOK;
1020 }
1021
1022 /* write_room et all */
1023 static int isicom_write_room(struct tty_struct *tty)
1024 {
1025 struct isi_port *port = tty->driver_data;
1026 int free;
1027
1028 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1029 return 0;
1030
1031 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1032 if (free < 0)
1033 free = 0;
1034 return free;
1035 }
1036
1037 /* chars_in_buffer et all */
1038 static int isicom_chars_in_buffer(struct tty_struct *tty)
1039 {
1040 struct isi_port *port = tty->driver_data;
1041 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1042 return 0;
1043 return port->xmit_cnt;
1044 }
1045
1046 /* ioctl et all */
1047 static int isicom_send_break(struct tty_struct *tty, int length)
1048 {
1049 struct isi_port *port = tty->driver_data;
1050 struct isi_board *card = port->card;
1051 unsigned long base = card->base;
1052
1053 if (length == -1)
1054 return -EOPNOTSUPP;
1055
1056 if (!lock_card(card))
1057 return -EINVAL;
1058
1059 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1060 outw((length & 0xff) << 8 | 0x00, base);
1061 outw((length & 0xff00), base);
1062 InterruptTheCard(base);
1063
1064 unlock_card(card);
1065 return 0;
1066 }
1067
1068 static int isicom_tiocmget(struct tty_struct *tty)
1069 {
1070 struct isi_port *port = tty->driver_data;
1071 /* just send the port status */
1072 u16 status = port->status;
1073
1074 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1075 return -ENODEV;
1076
1077 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1078 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1079 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1080 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1081 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1082 ((status & ISI_RI ) ? TIOCM_RI : 0);
1083 }
1084
1085 static int isicom_tiocmset(struct tty_struct *tty,
1086 unsigned int set, unsigned int clear)
1087 {
1088 struct isi_port *port = tty->driver_data;
1089 unsigned long flags;
1090
1091 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1092 return -ENODEV;
1093
1094 spin_lock_irqsave(&port->card->card_lock, flags);
1095 if (set & TIOCM_RTS)
1096 raise_rts(port);
1097 if (set & TIOCM_DTR)
1098 raise_dtr(port);
1099
1100 if (clear & TIOCM_RTS)
1101 drop_rts(port);
1102 if (clear & TIOCM_DTR)
1103 drop_dtr(port);
1104 spin_unlock_irqrestore(&port->card->card_lock, flags);
1105
1106 return 0;
1107 }
1108
1109 static int isicom_set_serial_info(struct tty_struct *tty,
1110 struct serial_struct __user *info)
1111 {
1112 struct isi_port *port = tty->driver_data;
1113 struct serial_struct newinfo;
1114 int reconfig_port;
1115
1116 if (copy_from_user(&newinfo, info, sizeof(newinfo)))
1117 return -EFAULT;
1118
1119 mutex_lock(&port->port.mutex);
1120 reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
1121 (newinfo.flags & ASYNC_SPD_MASK));
1122
1123 if (!capable(CAP_SYS_ADMIN)) {
1124 if ((newinfo.close_delay != port->port.close_delay) ||
1125 (newinfo.closing_wait != port->port.closing_wait) ||
1126 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1127 (port->port.flags & ~ASYNC_USR_MASK))) {
1128 mutex_unlock(&port->port.mutex);
1129 return -EPERM;
1130 }
1131 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1132 (newinfo.flags & ASYNC_USR_MASK));
1133 } else {
1134 port->port.close_delay = newinfo.close_delay;
1135 port->port.closing_wait = newinfo.closing_wait;
1136 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1137 (newinfo.flags & ASYNC_FLAGS));
1138 }
1139 if (reconfig_port) {
1140 unsigned long flags;
1141 spin_lock_irqsave(&port->card->card_lock, flags);
1142 isicom_config_port(tty);
1143 spin_unlock_irqrestore(&port->card->card_lock, flags);
1144 }
1145 mutex_unlock(&port->port.mutex);
1146 return 0;
1147 }
1148
1149 static int isicom_get_serial_info(struct isi_port *port,
1150 struct serial_struct __user *info)
1151 {
1152 struct serial_struct out_info;
1153
1154 mutex_lock(&port->port.mutex);
1155 memset(&out_info, 0, sizeof(out_info));
1156 /* out_info.type = ? */
1157 out_info.line = port - isi_ports;
1158 out_info.port = port->card->base;
1159 out_info.irq = port->card->irq;
1160 out_info.flags = port->port.flags;
1161 /* out_info.baud_base = ? */
1162 out_info.close_delay = port->port.close_delay;
1163 out_info.closing_wait = port->port.closing_wait;
1164 mutex_unlock(&port->port.mutex);
1165 if (copy_to_user(info, &out_info, sizeof(out_info)))
1166 return -EFAULT;
1167 return 0;
1168 }
1169
1170 static int isicom_ioctl(struct tty_struct *tty,
1171 unsigned int cmd, unsigned long arg)
1172 {
1173 struct isi_port *port = tty->driver_data;
1174 void __user *argp = (void __user *)arg;
1175
1176 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1177 return -ENODEV;
1178
1179 switch (cmd) {
1180 case TIOCGSERIAL:
1181 return isicom_get_serial_info(port, argp);
1182
1183 case TIOCSSERIAL:
1184 return isicom_set_serial_info(tty, argp);
1185
1186 default:
1187 return -ENOIOCTLCMD;
1188 }
1189 return 0;
1190 }
1191
1192 /* set_termios et all */
1193 static void isicom_set_termios(struct tty_struct *tty,
1194 struct ktermios *old_termios)
1195 {
1196 struct isi_port *port = tty->driver_data;
1197 unsigned long flags;
1198
1199 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1200 return;
1201
1202 if (tty->termios->c_cflag == old_termios->c_cflag &&
1203 tty->termios->c_iflag == old_termios->c_iflag)
1204 return;
1205
1206 spin_lock_irqsave(&port->card->card_lock, flags);
1207 isicom_config_port(tty);
1208 spin_unlock_irqrestore(&port->card->card_lock, flags);
1209
1210 if ((old_termios->c_cflag & CRTSCTS) &&
1211 !(tty->termios->c_cflag & CRTSCTS)) {
1212 tty->hw_stopped = 0;
1213 isicom_start(tty);
1214 }
1215 }
1216
1217 /* throttle et all */
1218 static void isicom_throttle(struct tty_struct *tty)
1219 {
1220 struct isi_port *port = tty->driver_data;
1221 struct isi_board *card = port->card;
1222
1223 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1224 return;
1225
1226 /* tell the card that this port cannot handle any more data for now */
1227 card->port_status &= ~(1 << port->channel);
1228 outw(card->port_status, card->base + 0x02);
1229 }
1230
1231 /* unthrottle et all */
1232 static void isicom_unthrottle(struct tty_struct *tty)
1233 {
1234 struct isi_port *port = tty->driver_data;
1235 struct isi_board *card = port->card;
1236
1237 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1238 return;
1239
1240 /* tell the card that this port is ready to accept more data */
1241 card->port_status |= (1 << port->channel);
1242 outw(card->port_status, card->base + 0x02);
1243 }
1244
1245 /* stop et all */
1246 static void isicom_stop(struct tty_struct *tty)
1247 {
1248 struct isi_port *port = tty->driver_data;
1249
1250 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1251 return;
1252
1253 /* this tells the transmitter not to consider this port for
1254 data output to the card. */
1255 port->status &= ~ISI_TXOK;
1256 }
1257
1258 /* start et all */
1259 static void isicom_start(struct tty_struct *tty)
1260 {
1261 struct isi_port *port = tty->driver_data;
1262
1263 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1264 return;
1265
1266 /* this tells the transmitter to consider this port for
1267 data output to the card. */
1268 port->status |= ISI_TXOK;
1269 }
1270
1271 static void isicom_hangup(struct tty_struct *tty)
1272 {
1273 struct isi_port *port = tty->driver_data;
1274
1275 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1276 return;
1277 tty_port_hangup(&port->port);
1278 }
1279
1280
1281 /*
1282 * Driver init and deinit functions
1283 */
1284
1285 static const struct tty_operations isicom_ops = {
1286 .open = isicom_open,
1287 .close = isicom_close,
1288 .write = isicom_write,
1289 .put_char = isicom_put_char,
1290 .flush_chars = isicom_flush_chars,
1291 .write_room = isicom_write_room,
1292 .chars_in_buffer = isicom_chars_in_buffer,
1293 .ioctl = isicom_ioctl,
1294 .set_termios = isicom_set_termios,
1295 .throttle = isicom_throttle,
1296 .unthrottle = isicom_unthrottle,
1297 .stop = isicom_stop,
1298 .start = isicom_start,
1299 .hangup = isicom_hangup,
1300 .flush_buffer = isicom_flush_buffer,
1301 .tiocmget = isicom_tiocmget,
1302 .tiocmset = isicom_tiocmset,
1303 .break_ctl = isicom_send_break,
1304 };
1305
1306 static const struct tty_port_operations isicom_port_ops = {
1307 .carrier_raised = isicom_carrier_raised,
1308 .dtr_rts = isicom_dtr_rts,
1309 .activate = isicom_activate,
1310 .shutdown = isicom_shutdown,
1311 };
1312
1313 static int __devinit reset_card(struct pci_dev *pdev,
1314 const unsigned int card, unsigned int *signature)
1315 {
1316 struct isi_board *board = pci_get_drvdata(pdev);
1317 unsigned long base = board->base;
1318 unsigned int sig, portcount = 0;
1319 int retval = 0;
1320
1321 dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1322 base);
1323
1324 inw(base + 0x8);
1325
1326 msleep(10);
1327
1328 outw(0, base + 0x8); /* Reset */
1329
1330 msleep(1000);
1331
1332 sig = inw(base + 0x4) & 0xff;
1333
1334 if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1335 sig != 0xee) {
1336 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1337 "bad I/O Port Address 0x%lx).\n", card + 1, base);
1338 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1339 retval = -EIO;
1340 goto end;
1341 }
1342
1343 msleep(10);
1344
1345 portcount = inw(base + 0x2);
1346 if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1347 portcount != 8 && portcount != 16)) {
1348 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1349 card + 1);
1350 retval = -EIO;
1351 goto end;
1352 }
1353
1354 switch (sig) {
1355 case 0xa5:
1356 case 0xbb:
1357 case 0xdd:
1358 board->port_count = (portcount == 4) ? 4 : 8;
1359 board->shift_count = 12;
1360 break;
1361 case 0xcc:
1362 case 0xee:
1363 board->port_count = 16;
1364 board->shift_count = 11;
1365 break;
1366 }
1367 dev_info(&pdev->dev, "-Done\n");
1368 *signature = sig;
1369
1370 end:
1371 return retval;
1372 }
1373
1374 static int __devinit load_firmware(struct pci_dev *pdev,
1375 const unsigned int index, const unsigned int signature)
1376 {
1377 struct isi_board *board = pci_get_drvdata(pdev);
1378 const struct firmware *fw;
1379 unsigned long base = board->base;
1380 unsigned int a;
1381 u16 word_count, status;
1382 int retval = -EIO;
1383 char *name;
1384 u8 *data;
1385
1386 struct stframe {
1387 u16 addr;
1388 u16 count;
1389 u8 data[0];
1390 } *frame;
1391
1392 switch (signature) {
1393 case 0xa5:
1394 name = "isi608.bin";
1395 break;
1396 case 0xbb:
1397 name = "isi608em.bin";
1398 break;
1399 case 0xcc:
1400 name = "isi616em.bin";
1401 break;
1402 case 0xdd:
1403 name = "isi4608.bin";
1404 break;
1405 case 0xee:
1406 name = "isi4616.bin";
1407 break;
1408 default:
1409 dev_err(&pdev->dev, "Unknown signature.\n");
1410 goto end;
1411 }
1412
1413 retval = request_firmware(&fw, name, &pdev->dev);
1414 if (retval)
1415 goto end;
1416
1417 retval = -EIO;
1418
1419 for (frame = (struct stframe *)fw->data;
1420 frame < (struct stframe *)(fw->data + fw->size);
1421 frame = (struct stframe *)((u8 *)(frame + 1) +
1422 frame->count)) {
1423 if (WaitTillCardIsFree(base))
1424 goto errrelfw;
1425
1426 outw(0xf0, base); /* start upload sequence */
1427 outw(0x00, base);
1428 outw(frame->addr, base); /* lsb of address */
1429
1430 word_count = frame->count / 2 + frame->count % 2;
1431 outw(word_count, base);
1432 InterruptTheCard(base);
1433
1434 udelay(100); /* 0x2f */
1435
1436 if (WaitTillCardIsFree(base))
1437 goto errrelfw;
1438
1439 status = inw(base + 0x4);
1440 if (status != 0) {
1441 dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1442 "Address:0x%x\n"
1443 "Count:0x%x\n"
1444 "Status:0x%x\n",
1445 index + 1, frame->addr, frame->count, status);
1446 goto errrelfw;
1447 }
1448 outsw(base, frame->data, word_count);
1449
1450 InterruptTheCard(base);
1451
1452 udelay(50); /* 0x0f */
1453
1454 if (WaitTillCardIsFree(base))
1455 goto errrelfw;
1456
1457 status = inw(base + 0x4);
1458 if (status != 0) {
1459 dev_err(&pdev->dev, "Card%d got out of sync.Card "
1460 "Status:0x%x\n", index + 1, status);
1461 goto errrelfw;
1462 }
1463 }
1464
1465 /* XXX: should we test it by reading it back and comparing with original like
1466 * in load firmware package? */
1467 for (frame = (struct stframe *)fw->data;
1468 frame < (struct stframe *)(fw->data + fw->size);
1469 frame = (struct stframe *)((u8 *)(frame + 1) +
1470 frame->count)) {
1471 if (WaitTillCardIsFree(base))
1472 goto errrelfw;
1473
1474 outw(0xf1, base); /* start download sequence */
1475 outw(0x00, base);
1476 outw(frame->addr, base); /* lsb of address */
1477
1478 word_count = (frame->count >> 1) + frame->count % 2;
1479 outw(word_count + 1, base);
1480 InterruptTheCard(base);
1481
1482 udelay(50); /* 0xf */
1483
1484 if (WaitTillCardIsFree(base))
1485 goto errrelfw;
1486
1487 status = inw(base + 0x4);
1488 if (status != 0) {
1489 dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1490 "Address:0x%x\n"
1491 "Count:0x%x\n"
1492 "Status: 0x%x\n",
1493 index + 1, frame->addr, frame->count, status);
1494 goto errrelfw;
1495 }
1496
1497 data = kmalloc(word_count * 2, GFP_KERNEL);
1498 if (data == NULL) {
1499 dev_err(&pdev->dev, "Card%d, firmware upload "
1500 "failed, not enough memory\n", index + 1);
1501 goto errrelfw;
1502 }
1503 inw(base);
1504 insw(base, data, word_count);
1505 InterruptTheCard(base);
1506
1507 for (a = 0; a < frame->count; a++)
1508 if (data[a] != frame->data[a]) {
1509 kfree(data);
1510 dev_err(&pdev->dev, "Card%d, firmware upload "
1511 "failed\n", index + 1);
1512 goto errrelfw;
1513 }
1514 kfree(data);
1515
1516 udelay(50); /* 0xf */
1517
1518 if (WaitTillCardIsFree(base))
1519 goto errrelfw;
1520
1521 status = inw(base + 0x4);
1522 if (status != 0) {
1523 dev_err(&pdev->dev, "Card%d verify got out of sync. "
1524 "Card Status:0x%x\n", index + 1, status);
1525 goto errrelfw;
1526 }
1527 }
1528
1529 /* xfer ctrl */
1530 if (WaitTillCardIsFree(base))
1531 goto errrelfw;
1532
1533 outw(0xf2, base);
1534 outw(0x800, base);
1535 outw(0x0, base);
1536 outw(0x0, base);
1537 InterruptTheCard(base);
1538 outw(0x0, base + 0x4); /* for ISI4608 cards */
1539
1540 board->status |= FIRMWARE_LOADED;
1541 retval = 0;
1542
1543 errrelfw:
1544 release_firmware(fw);
1545 end:
1546 return retval;
1547 }
1548
1549 /*
1550 * Insmod can set static symbols so keep these static
1551 */
1552 static unsigned int card_count;
1553
1554 static int __devinit isicom_probe(struct pci_dev *pdev,
1555 const struct pci_device_id *ent)
1556 {
1557 unsigned int uninitialized_var(signature), index;
1558 int retval = -EPERM;
1559 struct isi_board *board = NULL;
1560
1561 if (card_count >= BOARD_COUNT)
1562 goto err;
1563
1564 retval = pci_enable_device(pdev);
1565 if (retval) {
1566 dev_err(&pdev->dev, "failed to enable\n");
1567 goto err;
1568 }
1569
1570 dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1571
1572 /* allot the first empty slot in the array */
1573 for (index = 0; index < BOARD_COUNT; index++) {
1574 if (isi_card[index].base == 0) {
1575 board = &isi_card[index];
1576 break;
1577 }
1578 }
1579 if (index == BOARD_COUNT) {
1580 retval = -ENODEV;
1581 goto err_disable;
1582 }
1583
1584 board->index = index;
1585 board->base = pci_resource_start(pdev, 3);
1586 board->irq = pdev->irq;
1587 card_count++;
1588
1589 pci_set_drvdata(pdev, board);
1590
1591 retval = pci_request_region(pdev, 3, ISICOM_NAME);
1592 if (retval) {
1593 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1594 "will be disabled.\n", board->base, board->base + 15,
1595 index + 1);
1596 retval = -EBUSY;
1597 goto errdec;
1598 }
1599
1600 retval = request_irq(board->irq, isicom_interrupt,
1601 IRQF_SHARED, ISICOM_NAME, board);
1602 if (retval < 0) {
1603 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1604 "Card%d will be disabled.\n", board->irq, index + 1);
1605 goto errunrr;
1606 }
1607
1608 retval = reset_card(pdev, index, &signature);
1609 if (retval < 0)
1610 goto errunri;
1611
1612 retval = load_firmware(pdev, index, signature);
1613 if (retval < 0)
1614 goto errunri;
1615
1616 for (index = 0; index < board->port_count; index++)
1617 tty_register_device(isicom_normal, board->index * 16 + index,
1618 &pdev->dev);
1619
1620 return 0;
1621
1622 errunri:
1623 free_irq(board->irq, board);
1624 errunrr:
1625 pci_release_region(pdev, 3);
1626 errdec:
1627 board->base = 0;
1628 card_count--;
1629 err_disable:
1630 pci_disable_device(pdev);
1631 err:
1632 return retval;
1633 }
1634
1635 static void __devexit isicom_remove(struct pci_dev *pdev)
1636 {
1637 struct isi_board *board = pci_get_drvdata(pdev);
1638 unsigned int i;
1639
1640 for (i = 0; i < board->port_count; i++)
1641 tty_unregister_device(isicom_normal, board->index * 16 + i);
1642
1643 free_irq(board->irq, board);
1644 pci_release_region(pdev, 3);
1645 board->base = 0;
1646 card_count--;
1647 pci_disable_device(pdev);
1648 }
1649
1650 static int __init isicom_init(void)
1651 {
1652 int retval, idx, channel;
1653 struct isi_port *port;
1654
1655 for (idx = 0; idx < BOARD_COUNT; idx++) {
1656 port = &isi_ports[idx * 16];
1657 isi_card[idx].ports = port;
1658 spin_lock_init(&isi_card[idx].card_lock);
1659 for (channel = 0; channel < 16; channel++, port++) {
1660 tty_port_init(&port->port);
1661 port->port.ops = &isicom_port_ops;
1662 port->magic = ISICOM_MAGIC;
1663 port->card = &isi_card[idx];
1664 port->channel = channel;
1665 port->port.close_delay = 50 * HZ/100;
1666 port->port.closing_wait = 3000 * HZ/100;
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->owner = THIS_MODULE;
1682 isicom_normal->name = "ttyM";
1683 isicom_normal->major = ISICOM_NMAJOR;
1684 isicom_normal->minor_start = 0;
1685 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1686 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1687 isicom_normal->init_termios = tty_std_termios;
1688 isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
1689 CLOCAL;
1690 isicom_normal->flags = TTY_DRIVER_REAL_RAW |
1691 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
1692 tty_set_operations(isicom_normal, &isicom_ops);
1693
1694 retval = tty_register_driver(isicom_normal);
1695 if (retval) {
1696 pr_debug("Couldn't register the dialin driver\n");
1697 goto err_puttty;
1698 }
1699
1700 retval = pci_register_driver(&isicom_driver);
1701 if (retval < 0) {
1702 pr_err("Unable to register pci driver.\n");
1703 goto err_unrtty;
1704 }
1705
1706 mod_timer(&tx, jiffies + 1);
1707
1708 return 0;
1709 err_unrtty:
1710 tty_unregister_driver(isicom_normal);
1711 err_puttty:
1712 put_tty_driver(isicom_normal);
1713 error:
1714 return retval;
1715 }
1716
1717 static void __exit isicom_exit(void)
1718 {
1719 del_timer_sync(&tx);
1720
1721 pci_unregister_driver(&isicom_driver);
1722 tty_unregister_driver(isicom_normal);
1723 put_tty_driver(isicom_normal);
1724 }
1725
1726 module_init(isicom_init);
1727 module_exit(isicom_exit);
1728
1729 MODULE_AUTHOR("MultiTech");
1730 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1731 MODULE_LICENSE("GPL");
1732 MODULE_FIRMWARE("isi608.bin");
1733 MODULE_FIRMWARE("isi608em.bin");
1734 MODULE_FIRMWARE("isi616em.bin");
1735 MODULE_FIRMWARE("isi4608.bin");
1736 MODULE_FIRMWARE("isi4616.bin");