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[cor.git] / drivers / tty / isicom.c
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1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Original driver code supplied by Multi-Tech
4 *
5 * Changes
6 * 1/9/98 alan@lxorguk.ukuu.org.uk
7 * Merge to 2.0.x kernel tree
8 * Obtain and use official major/minors
9 * Loader switched to a misc device
10 * (fixed range check bug as a side effect)
11 * Printk clean up
12 * 9/12/98 alan@lxorguk.ukuu.org.uk
13 * Rough port to 2.1.x
14 *
15 * 10/6/99 sameer Merged the ISA and PCI drivers to
16 * a new unified driver.
17 *
18 * 3/9/99 sameer Added support for ISI4616 cards.
19 *
20 * 16/9/99 sameer We do not force RTS low anymore.
21 * This is to prevent the firmware
22 * from getting confused.
23 *
24 * 26/10/99 sameer Cosmetic changes:The driver now
25 * dumps the Port Count information
26 * along with I/O address and IRQ.
27 *
28 * 13/12/99 sameer Fixed the problem with IRQ sharing.
29 *
30 * 10/5/00 sameer Fixed isicom_shutdown_board()
31 * to not lower DTR on all the ports
32 * when the last port on the card is
33 * closed.
34 *
35 * 10/5/00 sameer Signal mask setup command added
36 * to isicom_setup_port and
37 * isicom_shutdown_port.
38 *
39 * 24/5/00 sameer The driver is now SMP aware.
40 *
41 *
42 * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem
43 *
44 *
45 * 03/01/01 anil .s Added support for resetting the
46 * internal modems on ISI cards.
47 *
48 * 08/02/01 anil .s Upgraded the driver for kernel
49 * 2.4.x
50 *
51 * 11/04/01 Kevin Fixed firmware load problem with
52 * ISIHP-4X card
53 *
54 * 30/04/01 anil .s Fixed the remote login through
55 * ISI port problem. Now the link
56 * does not go down before password
57 * prompt.
58 *
59 * 03/05/01 anil .s Fixed the problem with IRQ sharing
60 * among ISI-PCI cards.
61 *
62 * 03/05/01 anil .s Added support to display the version
63 * info during insmod as well as module
64 * listing by lsmod.
65 *
66 * 10/05/01 anil .s Done the modifications to the source
67 * file and Install script so that the
68 * same installation can be used for
69 * 2.2.x and 2.4.x kernel.
70 *
71 * 06/06/01 anil .s Now we drop both dtr and rts during
72 * shutdown_port as well as raise them
73 * during isicom_config_port.
74 *
75 * 09/06/01 acme@conectiva.com.br use capable, not suser, do
76 * restore_flags on failure in
77 * isicom_send_break, verify put_user
78 * result
79 *
80 * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps
81 * Baud index extended to 21
82 *
83 * 20/03/03 ranjeeth Made to work for Linux Advanced server.
84 * Taken care of license warning.
85 *
86 * 10/12/03 Ravindra Made to work for Fedora Core 1 of
87 * Red Hat Distribution
88 *
89 * 06/01/05 Alan Cox Merged the ISI and base kernel strands
90 * into a single 2.6 driver
91 *
92 * ***********************************************************
93 *
94 * To use this driver you also need the support package. You
95 * can find this in RPM format on
96 * ftp://ftp.linux.org.uk/pub/linux/alan
97 *
98 * You can find the original tools for this direct from Multitech
99 * ftp://ftp.multitech.com/ISI-Cards/
100 *
101 * Having installed the cards the module options (/etc/modprobe.d/)
102 *
103 * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4
104 *
105 * Omit those entries for boards you don't have installed.
106 *
107 * TODO
108 * Merge testing
109 * 64-bit verification
110 */
111
112 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
113
114 #include <linux/module.h>
115 #include <linux/firmware.h>
116 #include <linux/kernel.h>
117 #include <linux/tty.h>
118 #include <linux/tty_flip.h>
119 #include <linux/termios.h>
120 #include <linux/fs.h>
121 #include <linux/sched.h>
122 #include <linux/serial.h>
123 #include <linux/mm.h>
124 #include <linux/interrupt.h>
125 #include <linux/timer.h>
126 #include <linux/delay.h>
127 #include <linux/ioport.h>
128 #include <linux/slab.h>
129
130 #include <linux/uaccess.h>
131 #include <linux/io.h>
132
133 #include <linux/pci.h>
134
135 #include <linux/isicom.h>
136
137 #define InterruptTheCard(base) outw(0, (base) + 0xc)
138 #define ClearInterrupt(base) inw((base) + 0x0a)
139
140 #ifdef DEBUG
141 #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
142 #else
143 #define isicom_paranoia_check(a, b, c) 0
144 #endif
145
146 static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
147 static void isicom_remove(struct pci_dev *);
148
149 static const struct pci_device_id isicom_pci_tbl[] = {
150 { PCI_DEVICE(VENDOR_ID, 0x2028) },
151 { PCI_DEVICE(VENDOR_ID, 0x2051) },
152 { PCI_DEVICE(VENDOR_ID, 0x2052) },
153 { PCI_DEVICE(VENDOR_ID, 0x2053) },
154 { PCI_DEVICE(VENDOR_ID, 0x2054) },
155 { PCI_DEVICE(VENDOR_ID, 0x2055) },
156 { PCI_DEVICE(VENDOR_ID, 0x2056) },
157 { PCI_DEVICE(VENDOR_ID, 0x2057) },
158 { PCI_DEVICE(VENDOR_ID, 0x2058) },
159 { 0 }
160 };
161 MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
162
163 static struct pci_driver isicom_driver = {
164 .name = "isicom",
165 .id_table = isicom_pci_tbl,
166 .probe = isicom_probe,
167 .remove = isicom_remove
168 };
169
170 static int prev_card = 3; /* start servicing isi_card[0] */
171 static struct tty_driver *isicom_normal;
172
173 static void isicom_tx(struct timer_list *unused);
174 static void isicom_start(struct tty_struct *tty);
175
176 static DEFINE_TIMER(tx, isicom_tx);
177
178 /* baud index mappings from linux defns to isi */
179
180 static signed char linuxb_to_isib[] = {
181 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
182 };
183
184 struct isi_board {
185 unsigned long base;
186 int irq;
187 unsigned char port_count;
188 unsigned short status;
189 unsigned short port_status; /* each bit for each port */
190 unsigned short shift_count;
191 struct isi_port *ports;
192 signed char count;
193 spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
194 unsigned long flags;
195 unsigned int index;
196 };
197
198 struct isi_port {
199 unsigned short magic;
200 struct tty_port port;
201 u16 channel;
202 u16 status;
203 struct isi_board *card;
204 unsigned char *xmit_buf;
205 int xmit_head;
206 int xmit_tail;
207 int xmit_cnt;
208 };
209
210 static struct isi_board isi_card[BOARD_COUNT];
211 static struct isi_port isi_ports[PORT_COUNT];
212
213 /*
214 * Locking functions for card level locking. We need to own both
215 * the kernel lock for the card and have the card in a position that
216 * it wants to talk.
217 */
218
219 static int WaitTillCardIsFree(unsigned long base)
220 {
221 unsigned int count = 0;
222
223 while (!(inw(base + 0xe) & 0x1) && count++ < 100)
224 mdelay(1);
225
226 return !(inw(base + 0xe) & 0x1);
227 }
228
229 static int lock_card(struct isi_board *card)
230 {
231 unsigned long base = card->base;
232 unsigned int retries, a;
233
234 for (retries = 0; retries < 10; retries++) {
235 spin_lock_irqsave(&card->card_lock, card->flags);
236 for (a = 0; a < 10; a++) {
237 if (inw(base + 0xe) & 0x1)
238 return 1;
239 udelay(10);
240 }
241 spin_unlock_irqrestore(&card->card_lock, card->flags);
242 msleep(10);
243 }
244 pr_warn("Failed to lock Card (0x%lx)\n", card->base);
245
246 return 0; /* Failed to acquire the card! */
247 }
248
249 static void unlock_card(struct isi_board *card)
250 {
251 spin_unlock_irqrestore(&card->card_lock, card->flags);
252 }
253
254 /*
255 * ISI Card specific ops ...
256 */
257
258 /* card->lock HAS to be held */
259 static void raise_dtr(struct isi_port *port)
260 {
261 struct isi_board *card = port->card;
262 unsigned long base = card->base;
263 u16 channel = port->channel;
264
265 if (WaitTillCardIsFree(base))
266 return;
267
268 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
269 outw(0x0504, base);
270 InterruptTheCard(base);
271 port->status |= ISI_DTR;
272 }
273
274 /* card->lock HAS to be held */
275 static void drop_dtr(struct isi_port *port)
276 {
277 struct isi_board *card = port->card;
278 unsigned long base = card->base;
279 u16 channel = port->channel;
280
281 if (WaitTillCardIsFree(base))
282 return;
283
284 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
285 outw(0x0404, base);
286 InterruptTheCard(base);
287 port->status &= ~ISI_DTR;
288 }
289
290 /* card->lock HAS to be held */
291 static inline void raise_rts(struct isi_port *port)
292 {
293 struct isi_board *card = port->card;
294 unsigned long base = card->base;
295 u16 channel = port->channel;
296
297 if (WaitTillCardIsFree(base))
298 return;
299
300 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
301 outw(0x0a04, base);
302 InterruptTheCard(base);
303 port->status |= ISI_RTS;
304 }
305
306 /* card->lock HAS to be held */
307 static inline void drop_rts(struct isi_port *port)
308 {
309 struct isi_board *card = port->card;
310 unsigned long base = card->base;
311 u16 channel = port->channel;
312
313 if (WaitTillCardIsFree(base))
314 return;
315
316 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
317 outw(0x0804, base);
318 InterruptTheCard(base);
319 port->status &= ~ISI_RTS;
320 }
321
322 /* card->lock MUST NOT be held */
323
324 static void isicom_dtr_rts(struct tty_port *port, int on)
325 {
326 struct isi_port *ip = container_of(port, struct isi_port, port);
327 struct isi_board *card = ip->card;
328 unsigned long base = card->base;
329 u16 channel = ip->channel;
330
331 if (!lock_card(card))
332 return;
333
334 if (on) {
335 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
336 outw(0x0f04, base);
337 InterruptTheCard(base);
338 ip->status |= (ISI_DTR | ISI_RTS);
339 } else {
340 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
341 outw(0x0C04, base);
342 InterruptTheCard(base);
343 ip->status &= ~(ISI_DTR | ISI_RTS);
344 }
345 unlock_card(card);
346 }
347
348 /* card->lock HAS to be held */
349 static void drop_dtr_rts(struct isi_port *port)
350 {
351 struct isi_board *card = port->card;
352 unsigned long base = card->base;
353 u16 channel = port->channel;
354
355 if (WaitTillCardIsFree(base))
356 return;
357
358 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
359 outw(0x0c04, base);
360 InterruptTheCard(base);
361 port->status &= ~(ISI_RTS | ISI_DTR);
362 }
363
364 /*
365 * ISICOM Driver specific routines ...
366 *
367 */
368
369 static inline int __isicom_paranoia_check(struct isi_port const *port,
370 char *name, const char *routine)
371 {
372 if (!port) {
373 pr_warn("Warning: bad isicom magic for dev %s in %s\n",
374 name, routine);
375 return 1;
376 }
377 if (port->magic != ISICOM_MAGIC) {
378 pr_warn("Warning: NULL isicom port for dev %s in %s\n",
379 name, routine);
380 return 1;
381 }
382
383 return 0;
384 }
385
386 /*
387 * Transmitter.
388 *
389 * We shovel data into the card buffers on a regular basis. The card
390 * will do the rest of the work for us.
391 */
392
393 static void isicom_tx(struct timer_list *unused)
394 {
395 unsigned long flags, base;
396 unsigned int retries;
397 short count = (BOARD_COUNT-1), card;
398 short txcount, wrd, residue, word_count, cnt;
399 struct isi_port *port;
400 struct tty_struct *tty;
401
402 /* find next active board */
403 card = (prev_card + 1) & 0x0003;
404 while (count-- > 0) {
405 if (isi_card[card].status & BOARD_ACTIVE)
406 break;
407 card = (card + 1) & 0x0003;
408 }
409 if (!(isi_card[card].status & BOARD_ACTIVE))
410 goto sched_again;
411
412 prev_card = card;
413
414 count = isi_card[card].port_count;
415 port = isi_card[card].ports;
416 base = isi_card[card].base;
417
418 spin_lock_irqsave(&isi_card[card].card_lock, flags);
419 for (retries = 0; retries < 100; retries++) {
420 if (inw(base + 0xe) & 0x1)
421 break;
422 udelay(2);
423 }
424 if (retries >= 100)
425 goto unlock;
426
427 tty = tty_port_tty_get(&port->port);
428 if (tty == NULL)
429 goto put_unlock;
430
431 for (; count > 0; count--, port++) {
432 /* port not active or tx disabled to force flow control */
433 if (!tty_port_initialized(&port->port) ||
434 !(port->status & ISI_TXOK))
435 continue;
436
437 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
438 if (txcount <= 0 || tty->stopped || tty->hw_stopped)
439 continue;
440
441 if (!(inw(base + 0x02) & (1 << port->channel)))
442 continue;
443
444 pr_debug("txing %d bytes, port%d.\n",
445 txcount, port->channel + 1);
446 outw((port->channel << isi_card[card].shift_count) | txcount,
447 base);
448 residue = NO;
449 wrd = 0;
450 while (1) {
451 cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
452 - port->xmit_tail));
453 if (residue == YES) {
454 residue = NO;
455 if (cnt > 0) {
456 wrd |= (port->port.xmit_buf[port->xmit_tail]
457 << 8);
458 port->xmit_tail = (port->xmit_tail + 1)
459 & (SERIAL_XMIT_SIZE - 1);
460 port->xmit_cnt--;
461 txcount--;
462 cnt--;
463 outw(wrd, base);
464 } else {
465 outw(wrd, base);
466 break;
467 }
468 }
469 if (cnt <= 0)
470 break;
471 word_count = cnt >> 1;
472 outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
473 port->xmit_tail = (port->xmit_tail
474 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
475 txcount -= (word_count << 1);
476 port->xmit_cnt -= (word_count << 1);
477 if (cnt & 0x0001) {
478 residue = YES;
479 wrd = port->port.xmit_buf[port->xmit_tail];
480 port->xmit_tail = (port->xmit_tail + 1)
481 & (SERIAL_XMIT_SIZE - 1);
482 port->xmit_cnt--;
483 txcount--;
484 }
485 }
486
487 InterruptTheCard(base);
488 if (port->xmit_cnt <= 0)
489 port->status &= ~ISI_TXOK;
490 if (port->xmit_cnt <= WAKEUP_CHARS)
491 tty_wakeup(tty);
492 }
493
494 put_unlock:
495 tty_kref_put(tty);
496 unlock:
497 spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
498 /* schedule another tx for hopefully in about 10ms */
499 sched_again:
500 mod_timer(&tx, jiffies + msecs_to_jiffies(10));
501 }
502
503 /*
504 * Main interrupt handler routine
505 */
506
507 static irqreturn_t isicom_interrupt(int irq, void *dev_id)
508 {
509 struct isi_board *card = dev_id;
510 struct isi_port *port;
511 struct tty_struct *tty;
512 unsigned long base;
513 u16 header, word_count, count, channel;
514 short byte_count;
515 unsigned char *rp;
516
517 if (!card || !(card->status & FIRMWARE_LOADED))
518 return IRQ_NONE;
519
520 base = card->base;
521
522 /* did the card interrupt us? */
523 if (!(inw(base + 0x0e) & 0x02))
524 return IRQ_NONE;
525
526 spin_lock(&card->card_lock);
527
528 /*
529 * disable any interrupts from the PCI card and lower the
530 * interrupt line
531 */
532 outw(0x8000, base+0x04);
533 ClearInterrupt(base);
534
535 inw(base); /* get the dummy word out */
536 header = inw(base);
537 channel = (header & 0x7800) >> card->shift_count;
538 byte_count = header & 0xff;
539
540 if (channel + 1 > card->port_count) {
541 pr_warn("%s(0x%lx): %d(channel) > port_count\n",
542 __func__, base, channel + 1);
543 outw(0x0000, base+0x04); /* enable interrupts */
544 spin_unlock(&card->card_lock);
545 return IRQ_HANDLED;
546 }
547 port = card->ports + channel;
548 if (!tty_port_initialized(&port->port)) {
549 outw(0x0000, base+0x04); /* enable interrupts */
550 spin_unlock(&card->card_lock);
551 return IRQ_HANDLED;
552 }
553
554 tty = tty_port_tty_get(&port->port);
555 if (tty == NULL) {
556 while (byte_count > 1) {
557 inw(base);
558 byte_count -= 2;
559 }
560 if (byte_count & 0x01)
561 inw(base);
562 outw(0x0000, base+0x04); /* enable interrupts */
563 spin_unlock(&card->card_lock);
564 return IRQ_HANDLED;
565 }
566
567 if (header & 0x8000) { /* Status Packet */
568 header = inw(base);
569 switch (header & 0xff) {
570 case 0: /* Change in EIA signals */
571 if (tty_port_check_carrier(&port->port)) {
572 if (port->status & ISI_DCD) {
573 if (!(header & ISI_DCD)) {
574 /* Carrier has been lost */
575 pr_debug("%s: DCD->low.\n",
576 __func__);
577 port->status &= ~ISI_DCD;
578 tty_hangup(tty);
579 }
580 } else if (header & ISI_DCD) {
581 /* Carrier has been detected */
582 pr_debug("%s: DCD->high.\n",
583 __func__);
584 port->status |= ISI_DCD;
585 wake_up_interruptible(&port->port.open_wait);
586 }
587 } else {
588 if (header & ISI_DCD)
589 port->status |= ISI_DCD;
590 else
591 port->status &= ~ISI_DCD;
592 }
593
594 if (tty_port_cts_enabled(&port->port)) {
595 if (tty->hw_stopped) {
596 if (header & ISI_CTS) {
597 tty->hw_stopped = 0;
598 /* start tx ing */
599 port->status |= (ISI_TXOK
600 | ISI_CTS);
601 tty_wakeup(tty);
602 }
603 } else if (!(header & ISI_CTS)) {
604 tty->hw_stopped = 1;
605 /* stop tx ing */
606 port->status &= ~(ISI_TXOK | ISI_CTS);
607 }
608 } else {
609 if (header & ISI_CTS)
610 port->status |= ISI_CTS;
611 else
612 port->status &= ~ISI_CTS;
613 }
614
615 if (header & ISI_DSR)
616 port->status |= ISI_DSR;
617 else
618 port->status &= ~ISI_DSR;
619
620 if (header & ISI_RI)
621 port->status |= ISI_RI;
622 else
623 port->status &= ~ISI_RI;
624
625 break;
626
627 case 1: /* Received Break !!! */
628 tty_insert_flip_char(&port->port, 0, TTY_BREAK);
629 if (port->port.flags & ASYNC_SAK)
630 do_SAK(tty);
631 tty_flip_buffer_push(&port->port);
632 break;
633
634 case 2: /* Statistics */
635 pr_debug("%s: stats!!!\n", __func__);
636 break;
637
638 default:
639 pr_debug("%s: Unknown code in status packet.\n",
640 __func__);
641 break;
642 }
643 } else { /* Data Packet */
644 count = tty_prepare_flip_string(&port->port, &rp,
645 byte_count & ~1);
646 pr_debug("%s: Can rx %d of %d bytes.\n",
647 __func__, count, byte_count);
648 word_count = count >> 1;
649 insw(base, rp, word_count);
650 byte_count -= (word_count << 1);
651 if (count & 0x0001) {
652 tty_insert_flip_char(&port->port, inw(base) & 0xff,
653 TTY_NORMAL);
654 byte_count -= 2;
655 }
656 if (byte_count > 0) {
657 pr_debug("%s(0x%lx:%d): Flip buffer overflow! dropping bytes...\n",
658 __func__, base, channel + 1);
659 /* drain out unread xtra data */
660 while (byte_count > 0) {
661 inw(base);
662 byte_count -= 2;
663 }
664 }
665 tty_flip_buffer_push(&port->port);
666 }
667 outw(0x0000, base+0x04); /* enable interrupts */
668 spin_unlock(&card->card_lock);
669 tty_kref_put(tty);
670
671 return IRQ_HANDLED;
672 }
673
674 static void isicom_config_port(struct tty_struct *tty)
675 {
676 struct isi_port *port = tty->driver_data;
677 struct isi_board *card = port->card;
678 unsigned long baud;
679 unsigned long base = card->base;
680 u16 channel_setup, channel = port->channel,
681 shift_count = card->shift_count;
682 unsigned char flow_ctrl;
683
684 /* FIXME: Switch to new tty baud API */
685 baud = C_BAUD(tty);
686 if (baud & CBAUDEX) {
687 baud &= ~CBAUDEX;
688
689 /* if CBAUDEX bit is on and the baud is set to either 50 or 75
690 * then the card is programmed for 57.6Kbps or 115Kbps
691 * respectively.
692 */
693
694 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
695 if (baud < 1 || baud > 4)
696 tty->termios.c_cflag &= ~CBAUDEX;
697 else
698 baud += 15;
699 }
700 if (baud == 15) {
701
702 /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
703 * by the set_serial_info ioctl ... this is done by
704 * the 'setserial' utility.
705 */
706
707 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
708 baud++; /* 57.6 Kbps */
709 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
710 baud += 2; /* 115 Kbps */
711 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
712 baud += 3; /* 230 kbps*/
713 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
714 baud += 4; /* 460 kbps*/
715 }
716 if (linuxb_to_isib[baud] == -1) {
717 /* hang up */
718 drop_dtr(port);
719 return;
720 } else
721 raise_dtr(port);
722
723 if (WaitTillCardIsFree(base) == 0) {
724 outw(0x8000 | (channel << shift_count) | 0x03, base);
725 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
726 channel_setup = 0;
727 switch (C_CSIZE(tty)) {
728 case CS5:
729 channel_setup |= ISICOM_CS5;
730 break;
731 case CS6:
732 channel_setup |= ISICOM_CS6;
733 break;
734 case CS7:
735 channel_setup |= ISICOM_CS7;
736 break;
737 case CS8:
738 channel_setup |= ISICOM_CS8;
739 break;
740 }
741
742 if (C_CSTOPB(tty))
743 channel_setup |= ISICOM_2SB;
744 if (C_PARENB(tty)) {
745 channel_setup |= ISICOM_EVPAR;
746 if (C_PARODD(tty))
747 channel_setup |= ISICOM_ODPAR;
748 }
749 outw(channel_setup, base);
750 InterruptTheCard(base);
751 }
752 tty_port_set_check_carrier(&port->port, !C_CLOCAL(tty));
753
754 /* flow control settings ...*/
755 flow_ctrl = 0;
756 tty_port_set_cts_flow(&port->port, C_CRTSCTS(tty));
757 if (C_CRTSCTS(tty))
758 flow_ctrl |= ISICOM_CTSRTS;
759 if (I_IXON(tty))
760 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
761 if (I_IXOFF(tty))
762 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
763
764 if (WaitTillCardIsFree(base) == 0) {
765 outw(0x8000 | (channel << shift_count) | 0x04, base);
766 outw(flow_ctrl << 8 | 0x05, base);
767 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
768 InterruptTheCard(base);
769 }
770
771 /* rx enabled -> enable port for rx on the card */
772 if (C_CREAD(tty)) {
773 card->port_status |= (1 << channel);
774 outw(card->port_status, base + 0x02);
775 }
776 }
777
778 /* open et all */
779
780 static inline void isicom_setup_board(struct isi_board *bp)
781 {
782 int channel;
783 struct isi_port *port;
784
785 bp->count++;
786 if (!(bp->status & BOARD_INIT)) {
787 port = bp->ports;
788 for (channel = 0; channel < bp->port_count; channel++, port++)
789 drop_dtr_rts(port);
790 }
791 bp->status |= BOARD_ACTIVE | BOARD_INIT;
792 }
793
794 /* Activate and thus setup board are protected from races against shutdown
795 by the tty_port mutex */
796
797 static int isicom_activate(struct tty_port *tport, struct tty_struct *tty)
798 {
799 struct isi_port *port = container_of(tport, struct isi_port, port);
800 struct isi_board *card = port->card;
801 unsigned long flags;
802
803 if (tty_port_alloc_xmit_buf(tport) < 0)
804 return -ENOMEM;
805
806 spin_lock_irqsave(&card->card_lock, flags);
807 isicom_setup_board(card);
808
809 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
810
811 /* discard any residual data */
812 if (WaitTillCardIsFree(card->base) == 0) {
813 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
814 card->base);
815 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
816 InterruptTheCard(card->base);
817 }
818 isicom_config_port(tty);
819 spin_unlock_irqrestore(&card->card_lock, flags);
820
821 return 0;
822 }
823
824 static int isicom_carrier_raised(struct tty_port *port)
825 {
826 struct isi_port *ip = container_of(port, struct isi_port, port);
827 return (ip->status & ISI_DCD)?1 : 0;
828 }
829
830 static struct tty_port *isicom_find_port(struct tty_struct *tty)
831 {
832 struct isi_port *port;
833 struct isi_board *card;
834 unsigned int board;
835 int line = tty->index;
836
837 board = BOARD(line);
838 card = &isi_card[board];
839
840 if (!(card->status & FIRMWARE_LOADED))
841 return NULL;
842
843 /* open on a port greater than the port count for the card !!! */
844 if (line > ((board * 16) + card->port_count - 1))
845 return NULL;
846
847 port = &isi_ports[line];
848 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
849 return NULL;
850
851 return &port->port;
852 }
853
854 static int isicom_open(struct tty_struct *tty, struct file *filp)
855 {
856 struct isi_port *port;
857 struct tty_port *tport;
858
859 tport = isicom_find_port(tty);
860 if (tport == NULL)
861 return -ENODEV;
862 port = container_of(tport, struct isi_port, port);
863
864 tty->driver_data = port;
865 return tty_port_open(tport, tty, filp);
866 }
867
868 /* close et all */
869
870 /* card->lock HAS to be held */
871 static void isicom_shutdown_port(struct isi_port *port)
872 {
873 struct isi_board *card = port->card;
874
875 if (--card->count < 0) {
876 pr_debug("%s: bad board(0x%lx) count %d.\n",
877 __func__, card->base, card->count);
878 card->count = 0;
879 }
880 /* last port was closed, shutdown that board too */
881 if (!card->count)
882 card->status &= BOARD_ACTIVE;
883 }
884
885 static void isicom_flush_buffer(struct tty_struct *tty)
886 {
887 struct isi_port *port = tty->driver_data;
888 struct isi_board *card = port->card;
889 unsigned long flags;
890
891 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
892 return;
893
894 spin_lock_irqsave(&card->card_lock, flags);
895 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
896 spin_unlock_irqrestore(&card->card_lock, flags);
897
898 tty_wakeup(tty);
899 }
900
901 static void isicom_shutdown(struct tty_port *port)
902 {
903 struct isi_port *ip = container_of(port, struct isi_port, port);
904 struct isi_board *card = ip->card;
905 unsigned long flags;
906
907 /* indicate to the card that no more data can be received
908 on this port */
909 spin_lock_irqsave(&card->card_lock, flags);
910 card->port_status &= ~(1 << ip->channel);
911 outw(card->port_status, card->base + 0x02);
912 isicom_shutdown_port(ip);
913 spin_unlock_irqrestore(&card->card_lock, flags);
914 tty_port_free_xmit_buf(port);
915 }
916
917 static void isicom_close(struct tty_struct *tty, struct file *filp)
918 {
919 struct isi_port *ip = tty->driver_data;
920 struct tty_port *port;
921
922 if (ip == NULL)
923 return;
924
925 port = &ip->port;
926 if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
927 return;
928 tty_port_close(port, tty, filp);
929 }
930
931 /* write et all */
932 static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
933 int count)
934 {
935 struct isi_port *port = tty->driver_data;
936 struct isi_board *card = port->card;
937 unsigned long flags;
938 int cnt, total = 0;
939
940 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
941 return 0;
942
943 spin_lock_irqsave(&card->card_lock, flags);
944
945 while (1) {
946 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
947 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
948 if (cnt <= 0)
949 break;
950
951 memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
952 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
953 - 1);
954 port->xmit_cnt += cnt;
955 buf += cnt;
956 count -= cnt;
957 total += cnt;
958 }
959 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
960 port->status |= ISI_TXOK;
961 spin_unlock_irqrestore(&card->card_lock, flags);
962 return total;
963 }
964
965 /* put_char et all */
966 static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
967 {
968 struct isi_port *port = tty->driver_data;
969 struct isi_board *card = port->card;
970 unsigned long flags;
971
972 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
973 return 0;
974
975 spin_lock_irqsave(&card->card_lock, flags);
976 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
977 spin_unlock_irqrestore(&card->card_lock, flags);
978 return 0;
979 }
980
981 port->port.xmit_buf[port->xmit_head++] = ch;
982 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
983 port->xmit_cnt++;
984 spin_unlock_irqrestore(&card->card_lock, flags);
985 return 1;
986 }
987
988 /* flush_chars et all */
989 static void isicom_flush_chars(struct tty_struct *tty)
990 {
991 struct isi_port *port = tty->driver_data;
992
993 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
994 return;
995
996 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
997 !port->port.xmit_buf)
998 return;
999
1000 /* this tells the transmitter to consider this port for
1001 data output to the card ... that's the best we can do. */
1002 port->status |= ISI_TXOK;
1003 }
1004
1005 /* write_room et all */
1006 static int isicom_write_room(struct tty_struct *tty)
1007 {
1008 struct isi_port *port = tty->driver_data;
1009 int free;
1010
1011 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1012 return 0;
1013
1014 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1015 if (free < 0)
1016 free = 0;
1017 return free;
1018 }
1019
1020 /* chars_in_buffer et all */
1021 static int isicom_chars_in_buffer(struct tty_struct *tty)
1022 {
1023 struct isi_port *port = tty->driver_data;
1024 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1025 return 0;
1026 return port->xmit_cnt;
1027 }
1028
1029 /* ioctl et all */
1030 static int isicom_send_break(struct tty_struct *tty, int length)
1031 {
1032 struct isi_port *port = tty->driver_data;
1033 struct isi_board *card = port->card;
1034 unsigned long base = card->base;
1035
1036 if (length == -1)
1037 return -EOPNOTSUPP;
1038
1039 if (!lock_card(card))
1040 return -EINVAL;
1041
1042 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1043 outw((length & 0xff) << 8 | 0x00, base);
1044 outw((length & 0xff00u), base);
1045 InterruptTheCard(base);
1046
1047 unlock_card(card);
1048 return 0;
1049 }
1050
1051 static int isicom_tiocmget(struct tty_struct *tty)
1052 {
1053 struct isi_port *port = tty->driver_data;
1054 /* just send the port status */
1055 u16 status = port->status;
1056
1057 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1058 return -ENODEV;
1059
1060 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1061 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1062 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1063 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1064 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1065 ((status & ISI_RI ) ? TIOCM_RI : 0);
1066 }
1067
1068 static int isicom_tiocmset(struct tty_struct *tty,
1069 unsigned int set, unsigned int clear)
1070 {
1071 struct isi_port *port = tty->driver_data;
1072 unsigned long flags;
1073
1074 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1075 return -ENODEV;
1076
1077 spin_lock_irqsave(&port->card->card_lock, flags);
1078 if (set & TIOCM_RTS)
1079 raise_rts(port);
1080 if (set & TIOCM_DTR)
1081 raise_dtr(port);
1082
1083 if (clear & TIOCM_RTS)
1084 drop_rts(port);
1085 if (clear & TIOCM_DTR)
1086 drop_dtr(port);
1087 spin_unlock_irqrestore(&port->card->card_lock, flags);
1088
1089 return 0;
1090 }
1091
1092 static int isicom_set_serial_info(struct tty_struct *tty,
1093 struct serial_struct *ss)
1094 {
1095 struct isi_port *port = tty->driver_data;
1096 int reconfig_port;
1097
1098 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1099 return -ENODEV;
1100
1101 mutex_lock(&port->port.mutex);
1102 reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
1103 (ss->flags & ASYNC_SPD_MASK));
1104
1105 if (!capable(CAP_SYS_ADMIN)) {
1106 if ((ss->close_delay != port->port.close_delay) ||
1107 (ss->closing_wait != port->port.closing_wait) ||
1108 ((ss->flags & ~ASYNC_USR_MASK) !=
1109 (port->port.flags & ~ASYNC_USR_MASK))) {
1110 mutex_unlock(&port->port.mutex);
1111 return -EPERM;
1112 }
1113 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1114 (ss->flags & ASYNC_USR_MASK));
1115 } else {
1116 port->port.close_delay = ss->close_delay;
1117 port->port.closing_wait = ss->closing_wait;
1118 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1119 (ss->flags & ASYNC_FLAGS));
1120 }
1121 if (reconfig_port) {
1122 unsigned long flags;
1123 spin_lock_irqsave(&port->card->card_lock, flags);
1124 isicom_config_port(tty);
1125 spin_unlock_irqrestore(&port->card->card_lock, flags);
1126 }
1127 mutex_unlock(&port->port.mutex);
1128 return 0;
1129 }
1130
1131 static int isicom_get_serial_info(struct tty_struct *tty,
1132 struct serial_struct *ss)
1133 {
1134 struct isi_port *port = tty->driver_data;
1135
1136 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1137 return -ENODEV;
1138
1139 mutex_lock(&port->port.mutex);
1140 /* ss->type = ? */
1141 ss->line = port - isi_ports;
1142 ss->port = port->card->base;
1143 ss->irq = port->card->irq;
1144 ss->flags = port->port.flags;
1145 /* ss->baud_base = ? */
1146 ss->close_delay = port->port.close_delay;
1147 ss->closing_wait = port->port.closing_wait;
1148 mutex_unlock(&port->port.mutex);
1149 return 0;
1150 }
1151
1152 /* set_termios et all */
1153 static void isicom_set_termios(struct tty_struct *tty,
1154 struct ktermios *old_termios)
1155 {
1156 struct isi_port *port = tty->driver_data;
1157 unsigned long flags;
1158
1159 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1160 return;
1161
1162 if (tty->termios.c_cflag == old_termios->c_cflag &&
1163 tty->termios.c_iflag == old_termios->c_iflag)
1164 return;
1165
1166 spin_lock_irqsave(&port->card->card_lock, flags);
1167 isicom_config_port(tty);
1168 spin_unlock_irqrestore(&port->card->card_lock, flags);
1169
1170 if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
1171 tty->hw_stopped = 0;
1172 isicom_start(tty);
1173 }
1174 }
1175
1176 /* throttle et all */
1177 static void isicom_throttle(struct tty_struct *tty)
1178 {
1179 struct isi_port *port = tty->driver_data;
1180 struct isi_board *card = port->card;
1181
1182 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1183 return;
1184
1185 /* tell the card that this port cannot handle any more data for now */
1186 card->port_status &= ~(1 << port->channel);
1187 outw(card->port_status, card->base + 0x02);
1188 }
1189
1190 /* unthrottle et all */
1191 static void isicom_unthrottle(struct tty_struct *tty)
1192 {
1193 struct isi_port *port = tty->driver_data;
1194 struct isi_board *card = port->card;
1195
1196 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1197 return;
1198
1199 /* tell the card that this port is ready to accept more data */
1200 card->port_status |= (1 << port->channel);
1201 outw(card->port_status, card->base + 0x02);
1202 }
1203
1204 /* stop et all */
1205 static void isicom_stop(struct tty_struct *tty)
1206 {
1207 struct isi_port *port = tty->driver_data;
1208
1209 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1210 return;
1211
1212 /* this tells the transmitter not to consider this port for
1213 data output to the card. */
1214 port->status &= ~ISI_TXOK;
1215 }
1216
1217 /* start et all */
1218 static void isicom_start(struct tty_struct *tty)
1219 {
1220 struct isi_port *port = tty->driver_data;
1221
1222 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1223 return;
1224
1225 /* this tells the transmitter to consider this port for
1226 data output to the card. */
1227 port->status |= ISI_TXOK;
1228 }
1229
1230 static void isicom_hangup(struct tty_struct *tty)
1231 {
1232 struct isi_port *port = tty->driver_data;
1233
1234 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1235 return;
1236 tty_port_hangup(&port->port);
1237 }
1238
1239
1240 /*
1241 * Driver init and deinit functions
1242 */
1243
1244 static const struct tty_operations isicom_ops = {
1245 .open = isicom_open,
1246 .close = isicom_close,
1247 .write = isicom_write,
1248 .put_char = isicom_put_char,
1249 .flush_chars = isicom_flush_chars,
1250 .write_room = isicom_write_room,
1251 .chars_in_buffer = isicom_chars_in_buffer,
1252 .set_termios = isicom_set_termios,
1253 .throttle = isicom_throttle,
1254 .unthrottle = isicom_unthrottle,
1255 .stop = isicom_stop,
1256 .start = isicom_start,
1257 .hangup = isicom_hangup,
1258 .flush_buffer = isicom_flush_buffer,
1259 .tiocmget = isicom_tiocmget,
1260 .tiocmset = isicom_tiocmset,
1261 .break_ctl = isicom_send_break,
1262 .get_serial = isicom_get_serial_info,
1263 .set_serial = isicom_set_serial_info,
1264 };
1265
1266 static const struct tty_port_operations isicom_port_ops = {
1267 .carrier_raised = isicom_carrier_raised,
1268 .dtr_rts = isicom_dtr_rts,
1269 .activate = isicom_activate,
1270 .shutdown = isicom_shutdown,
1271 };
1272
1273 static int reset_card(struct pci_dev *pdev,
1274 const unsigned int card, unsigned int *signature)
1275 {
1276 struct isi_board *board = pci_get_drvdata(pdev);
1277 unsigned long base = board->base;
1278 unsigned int sig, portcount = 0;
1279 int retval = 0;
1280
1281 dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1282 base);
1283
1284 inw(base + 0x8);
1285
1286 msleep(10);
1287
1288 outw(0, base + 0x8); /* Reset */
1289
1290 msleep(1000);
1291
1292 sig = inw(base + 0x4) & 0xff;
1293
1294 if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1295 sig != 0xee) {
1296 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1297 "bad I/O Port Address 0x%lx).\n", card + 1, base);
1298 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1299 retval = -EIO;
1300 goto end;
1301 }
1302
1303 msleep(10);
1304
1305 portcount = inw(base + 0x2);
1306 if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1307 portcount != 8 && portcount != 16)) {
1308 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1309 card + 1);
1310 retval = -EIO;
1311 goto end;
1312 }
1313
1314 switch (sig) {
1315 case 0xa5:
1316 case 0xbb:
1317 case 0xdd:
1318 board->port_count = (portcount == 4) ? 4 : 8;
1319 board->shift_count = 12;
1320 break;
1321 case 0xcc:
1322 case 0xee:
1323 board->port_count = 16;
1324 board->shift_count = 11;
1325 break;
1326 }
1327 dev_info(&pdev->dev, "-Done\n");
1328 *signature = sig;
1329
1330 end:
1331 return retval;
1332 }
1333
1334 static int load_firmware(struct pci_dev *pdev,
1335 const unsigned int index, const unsigned int signature)
1336 {
1337 struct isi_board *board = pci_get_drvdata(pdev);
1338 const struct firmware *fw;
1339 unsigned long base = board->base;
1340 unsigned int a;
1341 u16 word_count, status;
1342 int retval = -EIO;
1343 char *name;
1344 u8 *data;
1345
1346 struct stframe {
1347 u16 addr;
1348 u16 count;
1349 u8 data[0];
1350 } *frame;
1351
1352 switch (signature) {
1353 case 0xa5:
1354 name = "isi608.bin";
1355 break;
1356 case 0xbb:
1357 name = "isi608em.bin";
1358 break;
1359 case 0xcc:
1360 name = "isi616em.bin";
1361 break;
1362 case 0xdd:
1363 name = "isi4608.bin";
1364 break;
1365 case 0xee:
1366 name = "isi4616.bin";
1367 break;
1368 default:
1369 dev_err(&pdev->dev, "Unknown signature.\n");
1370 goto end;
1371 }
1372
1373 retval = request_firmware(&fw, name, &pdev->dev);
1374 if (retval)
1375 goto end;
1376
1377 retval = -EIO;
1378
1379 for (frame = (struct stframe *)fw->data;
1380 frame < (struct stframe *)(fw->data + fw->size);
1381 frame = (struct stframe *)((u8 *)(frame + 1) +
1382 frame->count)) {
1383 if (WaitTillCardIsFree(base))
1384 goto errrelfw;
1385
1386 outw(0xf0, base); /* start upload sequence */
1387 outw(0x00, base);
1388 outw(frame->addr, base); /* lsb of address */
1389
1390 word_count = frame->count / 2 + frame->count % 2;
1391 outw(word_count, base);
1392 InterruptTheCard(base);
1393
1394 udelay(100); /* 0x2f */
1395
1396 if (WaitTillCardIsFree(base))
1397 goto errrelfw;
1398
1399 status = inw(base + 0x4);
1400 if (status != 0) {
1401 dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1402 "Address:0x%x\n"
1403 "Count:0x%x\n"
1404 "Status:0x%x\n",
1405 index + 1, frame->addr, frame->count, status);
1406 goto errrelfw;
1407 }
1408 outsw(base, frame->data, word_count);
1409
1410 InterruptTheCard(base);
1411
1412 udelay(50); /* 0x0f */
1413
1414 if (WaitTillCardIsFree(base))
1415 goto errrelfw;
1416
1417 status = inw(base + 0x4);
1418 if (status != 0) {
1419 dev_err(&pdev->dev, "Card%d got out of sync.Card "
1420 "Status:0x%x\n", index + 1, status);
1421 goto errrelfw;
1422 }
1423 }
1424
1425 /* XXX: should we test it by reading it back and comparing with original like
1426 * in load firmware package? */
1427 for (frame = (struct stframe *)fw->data;
1428 frame < (struct stframe *)(fw->data + fw->size);
1429 frame = (struct stframe *)((u8 *)(frame + 1) +
1430 frame->count)) {
1431 if (WaitTillCardIsFree(base))
1432 goto errrelfw;
1433
1434 outw(0xf1, base); /* start download sequence */
1435 outw(0x00, base);
1436 outw(frame->addr, base); /* lsb of address */
1437
1438 word_count = (frame->count >> 1) + frame->count % 2;
1439 outw(word_count + 1, base);
1440 InterruptTheCard(base);
1441
1442 udelay(50); /* 0xf */
1443
1444 if (WaitTillCardIsFree(base))
1445 goto errrelfw;
1446
1447 status = inw(base + 0x4);
1448 if (status != 0) {
1449 dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1450 "Address:0x%x\n"
1451 "Count:0x%x\n"
1452 "Status: 0x%x\n",
1453 index + 1, frame->addr, frame->count, status);
1454 goto errrelfw;
1455 }
1456
1457 data = kmalloc_array(word_count, 2, GFP_KERNEL);
1458 if (data == NULL) {
1459 dev_err(&pdev->dev, "Card%d, firmware upload "
1460 "failed, not enough memory\n", index + 1);
1461 goto errrelfw;
1462 }
1463 inw(base);
1464 insw(base, data, word_count);
1465 InterruptTheCard(base);
1466
1467 for (a = 0; a < frame->count; a++)
1468 if (data[a] != frame->data[a]) {
1469 kfree(data);
1470 dev_err(&pdev->dev, "Card%d, firmware upload "
1471 "failed\n", index + 1);
1472 goto errrelfw;
1473 }
1474 kfree(data);
1475
1476 udelay(50); /* 0xf */
1477
1478 if (WaitTillCardIsFree(base))
1479 goto errrelfw;
1480
1481 status = inw(base + 0x4);
1482 if (status != 0) {
1483 dev_err(&pdev->dev, "Card%d verify got out of sync. "
1484 "Card Status:0x%x\n", index + 1, status);
1485 goto errrelfw;
1486 }
1487 }
1488
1489 /* xfer ctrl */
1490 if (WaitTillCardIsFree(base))
1491 goto errrelfw;
1492
1493 outw(0xf2, base);
1494 outw(0x800, base);
1495 outw(0x0, base);
1496 outw(0x0, base);
1497 InterruptTheCard(base);
1498 outw(0x0, base + 0x4); /* for ISI4608 cards */
1499
1500 board->status |= FIRMWARE_LOADED;
1501 retval = 0;
1502
1503 errrelfw:
1504 release_firmware(fw);
1505 end:
1506 return retval;
1507 }
1508
1509 /*
1510 * Insmod can set static symbols so keep these static
1511 */
1512 static unsigned int card_count;
1513
1514 static int isicom_probe(struct pci_dev *pdev,
1515 const struct pci_device_id *ent)
1516 {
1517 unsigned int uninitialized_var(signature), index;
1518 int retval = -EPERM;
1519 struct isi_board *board = NULL;
1520
1521 if (card_count >= BOARD_COUNT)
1522 goto err;
1523
1524 retval = pci_enable_device(pdev);
1525 if (retval) {
1526 dev_err(&pdev->dev, "failed to enable\n");
1527 goto err;
1528 }
1529
1530 dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1531
1532 /* allot the first empty slot in the array */
1533 for (index = 0; index < BOARD_COUNT; index++) {
1534 if (isi_card[index].base == 0) {
1535 board = &isi_card[index];
1536 break;
1537 }
1538 }
1539 if (index == BOARD_COUNT) {
1540 retval = -ENODEV;
1541 goto err_disable;
1542 }
1543
1544 board->index = index;
1545 board->base = pci_resource_start(pdev, 3);
1546 board->irq = pdev->irq;
1547 card_count++;
1548
1549 pci_set_drvdata(pdev, board);
1550
1551 retval = pci_request_region(pdev, 3, ISICOM_NAME);
1552 if (retval) {
1553 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1554 "will be disabled.\n", board->base, board->base + 15,
1555 index + 1);
1556 retval = -EBUSY;
1557 goto errdec;
1558 }
1559
1560 retval = request_irq(board->irq, isicom_interrupt,
1561 IRQF_SHARED, ISICOM_NAME, board);
1562 if (retval < 0) {
1563 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1564 "Card%d will be disabled.\n", board->irq, index + 1);
1565 goto errunrr;
1566 }
1567
1568 retval = reset_card(pdev, index, &signature);
1569 if (retval < 0)
1570 goto errunri;
1571
1572 retval = load_firmware(pdev, index, signature);
1573 if (retval < 0)
1574 goto errunri;
1575
1576 for (index = 0; index < board->port_count; index++) {
1577 struct tty_port *tport = &board->ports[index].port;
1578 tty_port_init(tport);
1579 tport->ops = &isicom_port_ops;
1580 tport->close_delay = 50 * HZ/100;
1581 tport->closing_wait = 3000 * HZ/100;
1582 tty_port_register_device(tport, isicom_normal,
1583 board->index * 16 + index, &pdev->dev);
1584 }
1585
1586 return 0;
1587
1588 errunri:
1589 free_irq(board->irq, board);
1590 errunrr:
1591 pci_release_region(pdev, 3);
1592 errdec:
1593 board->base = 0;
1594 card_count--;
1595 err_disable:
1596 pci_disable_device(pdev);
1597 err:
1598 return retval;
1599 }
1600
1601 static void isicom_remove(struct pci_dev *pdev)
1602 {
1603 struct isi_board *board = pci_get_drvdata(pdev);
1604 unsigned int i;
1605
1606 for (i = 0; i < board->port_count; i++) {
1607 tty_unregister_device(isicom_normal, board->index * 16 + i);
1608 tty_port_destroy(&board->ports[i].port);
1609 }
1610
1611 free_irq(board->irq, board);
1612 pci_release_region(pdev, 3);
1613 board->base = 0;
1614 card_count--;
1615 pci_disable_device(pdev);
1616 }
1617
1618 static int __init isicom_init(void)
1619 {
1620 int retval, idx, channel;
1621 struct isi_port *port;
1622
1623 for (idx = 0; idx < BOARD_COUNT; idx++) {
1624 port = &isi_ports[idx * 16];
1625 isi_card[idx].ports = port;
1626 spin_lock_init(&isi_card[idx].card_lock);
1627 for (channel = 0; channel < 16; channel++, port++) {
1628 port->magic = ISICOM_MAGIC;
1629 port->card = &isi_card[idx];
1630 port->channel = channel;
1631 port->status = 0;
1632 /* . . . */
1633 }
1634 isi_card[idx].base = 0;
1635 isi_card[idx].irq = 0;
1636 }
1637
1638 /* tty driver structure initialization */
1639 isicom_normal = alloc_tty_driver(PORT_COUNT);
1640 if (!isicom_normal) {
1641 retval = -ENOMEM;
1642 goto error;
1643 }
1644
1645 isicom_normal->name = "ttyM";
1646 isicom_normal->major = ISICOM_NMAJOR;
1647 isicom_normal->minor_start = 0;
1648 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1649 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1650 isicom_normal->init_termios = tty_std_termios;
1651 isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
1652 CLOCAL;
1653 isicom_normal->flags = TTY_DRIVER_REAL_RAW |
1654 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
1655 tty_set_operations(isicom_normal, &isicom_ops);
1656
1657 retval = tty_register_driver(isicom_normal);
1658 if (retval) {
1659 pr_debug("Couldn't register the dialin driver\n");
1660 goto err_puttty;
1661 }
1662
1663 retval = pci_register_driver(&isicom_driver);
1664 if (retval < 0) {
1665 pr_err("Unable to register pci driver.\n");
1666 goto err_unrtty;
1667 }
1668
1669 mod_timer(&tx, jiffies + 1);
1670
1671 return 0;
1672 err_unrtty:
1673 tty_unregister_driver(isicom_normal);
1674 err_puttty:
1675 put_tty_driver(isicom_normal);
1676 error:
1677 return retval;
1678 }
1679
1680 static void __exit isicom_exit(void)
1681 {
1682 del_timer_sync(&tx);
1683
1684 pci_unregister_driver(&isicom_driver);
1685 tty_unregister_driver(isicom_normal);
1686 put_tty_driver(isicom_normal);
1687 }
1688
1689 module_init(isicom_init);
1690 module_exit(isicom_exit);
1691
1692 MODULE_AUTHOR("MultiTech");
1693 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1694 MODULE_LICENSE("GPL");
1695 MODULE_FIRMWARE("isi608.bin");
1696 MODULE_FIRMWARE("isi608em.bin");
1697 MODULE_FIRMWARE("isi616em.bin");
1698 MODULE_FIRMWARE("isi4608.bin");
1699 MODULE_FIRMWARE("isi4616.bin");
connection oriented routing