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
146static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
147static void isicom_remove(struct pci_dev *);
148
149static 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};
161MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
162
163static struct pci_driver isicom_driver = {
164 .name = "isicom",
165 .id_table = isicom_pci_tbl,
166 .probe = isicom_probe,
167 .remove = isicom_remove
168};
169
170static int prev_card = 3; /* start servicing isi_card[0] */
171static struct tty_driver *isicom_normal;
172
173static void isicom_tx(struct timer_list *unused);
174static void isicom_start(struct tty_struct *tty);
175
176static DEFINE_TIMER(tx, isicom_tx);
177
178/* baud index mappings from linux defns to isi */
179
180static 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
184struct 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
198struct 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
210static struct isi_board isi_card[BOARD_COUNT];
211static 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
219static 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
229static 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
249static 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 */
259static 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 */
275static 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 */
291static 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 */
307static 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
324static 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 */
349static 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
369static 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
393static 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
494put_unlock:
495 tty_kref_put(tty);
496unlock:
497 spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
498 /* schedule another tx for hopefully in about 10ms */
499sched_again:
500 mod_timer(&tx, jiffies + msecs_to_jiffies(10));
501}
502
503/*
504 * Main interrupt handler routine
505 */
506
507static 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 word_count = byte_count >> 1;
557 while (byte_count > 1) {
558 inw(base);
559 byte_count -= 2;
560 }
561 if (byte_count & 0x01)
562 inw(base);
563 outw(0x0000, base+0x04); /* enable interrupts */
564 spin_unlock(&card->card_lock);
565 return IRQ_HANDLED;
566 }
567
568 if (header & 0x8000) { /* Status Packet */
569 header = inw(base);
570 switch (header & 0xff) {
571 case 0: /* Change in EIA signals */
572 if (tty_port_check_carrier(&port->port)) {
573 if (port->status & ISI_DCD) {
574 if (!(header & ISI_DCD)) {
575 /* Carrier has been lost */
576 pr_debug("%s: DCD->low.\n",
577 __func__);
578 port->status &= ~ISI_DCD;
579 tty_hangup(tty);
580 }
581 } else if (header & ISI_DCD) {
582 /* Carrier has been detected */
583 pr_debug("%s: DCD->high.\n",
584 __func__);
585 port->status |= ISI_DCD;
586 wake_up_interruptible(&port->port.open_wait);
587 }
588 } else {
589 if (header & ISI_DCD)
590 port->status |= ISI_DCD;
591 else
592 port->status &= ~ISI_DCD;
593 }
594
595 if (tty_port_cts_enabled(&port->port)) {
596 if (tty->hw_stopped) {
597 if (header & ISI_CTS) {
598 tty->hw_stopped = 0;
599 /* start tx ing */
600 port->status |= (ISI_TXOK
601 | ISI_CTS);
602 tty_wakeup(tty);
603 }
604 } else if (!(header & ISI_CTS)) {
605 tty->hw_stopped = 1;
606 /* stop tx ing */
607 port->status &= ~(ISI_TXOK | ISI_CTS);
608 }
609 } else {
610 if (header & ISI_CTS)
611 port->status |= ISI_CTS;
612 else
613 port->status &= ~ISI_CTS;
614 }
615
616 if (header & ISI_DSR)
617 port->status |= ISI_DSR;
618 else
619 port->status &= ~ISI_DSR;
620
621 if (header & ISI_RI)
622 port->status |= ISI_RI;
623 else
624 port->status &= ~ISI_RI;
625
626 break;
627
628 case 1: /* Received Break !!! */
629 tty_insert_flip_char(&port->port, 0, TTY_BREAK);
630 if (port->port.flags & ASYNC_SAK)
631 do_SAK(tty);
632 tty_flip_buffer_push(&port->port);
633 break;
634
635 case 2: /* Statistics */
636 pr_debug("%s: stats!!!\n", __func__);
637 break;
638
639 default:
640 pr_debug("%s: Unknown code in status packet.\n",
641 __func__);
642 break;
643 }
644 } else { /* Data Packet */
645 count = tty_prepare_flip_string(&port->port, &rp,
646 byte_count & ~1);
647 pr_debug("%s: Can rx %d of %d bytes.\n",
648 __func__, count, byte_count);
649 word_count = count >> 1;
650 insw(base, rp, word_count);
651 byte_count -= (word_count << 1);
652 if (count & 0x0001) {
653 tty_insert_flip_char(&port->port, inw(base) & 0xff,
654 TTY_NORMAL);
655 byte_count -= 2;
656 }
657 if (byte_count > 0) {
658 pr_debug("%s(0x%lx:%d): Flip buffer overflow! dropping bytes...\n",
659 __func__, base, channel + 1);
660 /* drain out unread xtra data */
661 while (byte_count > 0) {
662 inw(base);
663 byte_count -= 2;
664 }
665 }
666 tty_flip_buffer_push(&port->port);
667 }
668 outw(0x0000, base+0x04); /* enable interrupts */
669 spin_unlock(&card->card_lock);
670 tty_kref_put(tty);
671
672 return IRQ_HANDLED;
673}
674
675static void isicom_config_port(struct tty_struct *tty)
676{
677 struct isi_port *port = tty->driver_data;
678 struct isi_board *card = port->card;
679 unsigned long baud;
680 unsigned long base = card->base;
681 u16 channel_setup, channel = port->channel,
682 shift_count = card->shift_count;
683 unsigned char flow_ctrl;
684
685 /* FIXME: Switch to new tty baud API */
686 baud = C_BAUD(tty);
687 if (baud & CBAUDEX) {
688 baud &= ~CBAUDEX;
689
690 /* if CBAUDEX bit is on and the baud is set to either 50 or 75
691 * then the card is programmed for 57.6Kbps or 115Kbps
692 * respectively.
693 */
694
695 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
696 if (baud < 1 || baud > 4)
697 tty->termios.c_cflag &= ~CBAUDEX;
698 else
699 baud += 15;
700 }
701 if (baud == 15) {
702
703 /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
704 * by the set_serial_info ioctl ... this is done by
705 * the 'setserial' utility.
706 */
707
708 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
709 baud++; /* 57.6 Kbps */
710 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
711 baud += 2; /* 115 Kbps */
712 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
713 baud += 3; /* 230 kbps*/
714 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
715 baud += 4; /* 460 kbps*/
716 }
717 if (linuxb_to_isib[baud] == -1) {
718 /* hang up */
719 drop_dtr(port);
720 return;
721 } else
722 raise_dtr(port);
723
724 if (WaitTillCardIsFree(base) == 0) {
725 outw(0x8000 | (channel << shift_count) | 0x03, base);
726 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
727 channel_setup = 0;
728 switch (C_CSIZE(tty)) {
729 case CS5:
730 channel_setup |= ISICOM_CS5;
731 break;
732 case CS6:
733 channel_setup |= ISICOM_CS6;
734 break;
735 case CS7:
736 channel_setup |= ISICOM_CS7;
737 break;
738 case CS8:
739 channel_setup |= ISICOM_CS8;
740 break;
741 }
742
743 if (C_CSTOPB(tty))
744 channel_setup |= ISICOM_2SB;
745 if (C_PARENB(tty)) {
746 channel_setup |= ISICOM_EVPAR;
747 if (C_PARODD(tty))
748 channel_setup |= ISICOM_ODPAR;
749 }
750 outw(channel_setup, base);
751 InterruptTheCard(base);
752 }
753 tty_port_set_check_carrier(&port->port, !C_CLOCAL(tty));
754
755 /* flow control settings ...*/
756 flow_ctrl = 0;
757 tty_port_set_cts_flow(&port->port, C_CRTSCTS(tty));
758 if (C_CRTSCTS(tty))
759 flow_ctrl |= ISICOM_CTSRTS;
760 if (I_IXON(tty))
761 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
762 if (I_IXOFF(tty))
763 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
764
765 if (WaitTillCardIsFree(base) == 0) {
766 outw(0x8000 | (channel << shift_count) | 0x04, base);
767 outw(flow_ctrl << 8 | 0x05, base);
768 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
769 InterruptTheCard(base);
770 }
771
772 /* rx enabled -> enable port for rx on the card */
773 if (C_CREAD(tty)) {
774 card->port_status |= (1 << channel);
775 outw(card->port_status, base + 0x02);
776 }
777}
778
779/* open et all */
780
781static inline void isicom_setup_board(struct isi_board *bp)
782{
783 int channel;
784 struct isi_port *port;
785
786 bp->count++;
787 if (!(bp->status & BOARD_INIT)) {
788 port = bp->ports;
789 for (channel = 0; channel < bp->port_count; channel++, port++)
790 drop_dtr_rts(port);
791 }
792 bp->status |= BOARD_ACTIVE | BOARD_INIT;
793}
794
795/* Activate and thus setup board are protected from races against shutdown
796 by the tty_port mutex */
797
798static int isicom_activate(struct tty_port *tport, struct tty_struct *tty)
799{
800 struct isi_port *port = container_of(tport, struct isi_port, port);
801 struct isi_board *card = port->card;
802 unsigned long flags;
803
804 if (tty_port_alloc_xmit_buf(tport) < 0)
805 return -ENOMEM;
806
807 spin_lock_irqsave(&card->card_lock, flags);
808 isicom_setup_board(card);
809
810 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
811
812 /* discard any residual data */
813 if (WaitTillCardIsFree(card->base) == 0) {
814 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
815 card->base);
816 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
817 InterruptTheCard(card->base);
818 }
819 isicom_config_port(tty);
820 spin_unlock_irqrestore(&card->card_lock, flags);
821
822 return 0;
823}
824
825static int isicom_carrier_raised(struct tty_port *port)
826{
827 struct isi_port *ip = container_of(port, struct isi_port, port);
828 return (ip->status & ISI_DCD)?1 : 0;
829}
830
831static struct tty_port *isicom_find_port(struct tty_struct *tty)
832{
833 struct isi_port *port;
834 struct isi_board *card;
835 unsigned int board;
836 int line = tty->index;
837
838 board = BOARD(line);
839 card = &isi_card[board];
840
841 if (!(card->status & FIRMWARE_LOADED))
842 return NULL;
843
844 /* open on a port greater than the port count for the card !!! */
845 if (line > ((board * 16) + card->port_count - 1))
846 return NULL;
847
848 port = &isi_ports[line];
849 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
850 return NULL;
851
852 return &port->port;
853}
854
855static int isicom_open(struct tty_struct *tty, struct file *filp)
856{
857 struct isi_port *port;
858 struct tty_port *tport;
859
860 tport = isicom_find_port(tty);
861 if (tport == NULL)
862 return -ENODEV;
863 port = container_of(tport, struct isi_port, port);
864
865 tty->driver_data = port;
866 return tty_port_open(tport, tty, filp);
867}
868
869/* close et all */
870
871/* card->lock HAS to be held */
872static void isicom_shutdown_port(struct isi_port *port)
873{
874 struct isi_board *card = port->card;
875
876 if (--card->count < 0) {
877 pr_debug("%s: bad board(0x%lx) count %d.\n",
878 __func__, card->base, card->count);
879 card->count = 0;
880 }
881 /* last port was closed, shutdown that board too */
882 if (!card->count)
883 card->status &= BOARD_ACTIVE;
884}
885
886static void isicom_flush_buffer(struct tty_struct *tty)
887{
888 struct isi_port *port = tty->driver_data;
889 struct isi_board *card = port->card;
890 unsigned long flags;
891
892 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
893 return;
894
895 spin_lock_irqsave(&card->card_lock, flags);
896 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
897 spin_unlock_irqrestore(&card->card_lock, flags);
898
899 tty_wakeup(tty);
900}
901
902static void isicom_shutdown(struct tty_port *port)
903{
904 struct isi_port *ip = container_of(port, struct isi_port, port);
905 struct isi_board *card = ip->card;
906 unsigned long flags;
907
908 /* indicate to the card that no more data can be received
909 on this port */
910 spin_lock_irqsave(&card->card_lock, flags);
911 card->port_status &= ~(1 << ip->channel);
912 outw(card->port_status, card->base + 0x02);
913 isicom_shutdown_port(ip);
914 spin_unlock_irqrestore(&card->card_lock, flags);
915 tty_port_free_xmit_buf(port);
916}
917
918static void isicom_close(struct tty_struct *tty, struct file *filp)
919{
920 struct isi_port *ip = tty->driver_data;
921 struct tty_port *port;
922
923 if (ip == NULL)
924 return;
925
926 port = &ip->port;
927 if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
928 return;
929 tty_port_close(port, tty, filp);
930}
931
932/* write et all */
933static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
934 int count)
935{
936 struct isi_port *port = tty->driver_data;
937 struct isi_board *card = port->card;
938 unsigned long flags;
939 int cnt, total = 0;
940
941 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
942 return 0;
943
944 spin_lock_irqsave(&card->card_lock, flags);
945
946 while (1) {
947 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
948 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
949 if (cnt <= 0)
950 break;
951
952 memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
953 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
954 - 1);
955 port->xmit_cnt += cnt;
956 buf += cnt;
957 count -= cnt;
958 total += cnt;
959 }
960 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
961 port->status |= ISI_TXOK;
962 spin_unlock_irqrestore(&card->card_lock, flags);
963 return total;
964}
965
966/* put_char et all */
967static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
968{
969 struct isi_port *port = tty->driver_data;
970 struct isi_board *card = port->card;
971 unsigned long flags;
972
973 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
974 return 0;
975
976 spin_lock_irqsave(&card->card_lock, flags);
977 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
978 spin_unlock_irqrestore(&card->card_lock, flags);
979 return 0;
980 }
981
982 port->port.xmit_buf[port->xmit_head++] = ch;
983 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
984 port->xmit_cnt++;
985 spin_unlock_irqrestore(&card->card_lock, flags);
986 return 1;
987}
988
989/* flush_chars et all */
990static void isicom_flush_chars(struct tty_struct *tty)
991{
992 struct isi_port *port = tty->driver_data;
993
994 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
995 return;
996
997 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
998 !port->port.xmit_buf)
999 return;
1000
1001 /* this tells the transmitter to consider this port for
1002 data output to the card ... that's the best we can do. */
1003 port->status |= ISI_TXOK;
1004}
1005
1006/* write_room et all */
1007static int isicom_write_room(struct tty_struct *tty)
1008{
1009 struct isi_port *port = tty->driver_data;
1010 int free;
1011
1012 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1013 return 0;
1014
1015 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1016 if (free < 0)
1017 free = 0;
1018 return free;
1019}
1020
1021/* chars_in_buffer et all */
1022static int isicom_chars_in_buffer(struct tty_struct *tty)
1023{
1024 struct isi_port *port = tty->driver_data;
1025 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1026 return 0;
1027 return port->xmit_cnt;
1028}
1029
1030/* ioctl et all */
1031static int isicom_send_break(struct tty_struct *tty, int length)
1032{
1033 struct isi_port *port = tty->driver_data;
1034 struct isi_board *card = port->card;
1035 unsigned long base = card->base;
1036
1037 if (length == -1)
1038 return -EOPNOTSUPP;
1039
1040 if (!lock_card(card))
1041 return -EINVAL;
1042
1043 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1044 outw((length & 0xff) << 8 | 0x00, base);
1045 outw((length & 0xff00u), base);
1046 InterruptTheCard(base);
1047
1048 unlock_card(card);
1049 return 0;
1050}
1051
1052static int isicom_tiocmget(struct tty_struct *tty)
1053{
1054 struct isi_port *port = tty->driver_data;
1055 /* just send the port status */
1056 u16 status = port->status;
1057
1058 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1059 return -ENODEV;
1060
1061 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1062 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1063 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1064 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1065 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1066 ((status & ISI_RI ) ? TIOCM_RI : 0);
1067}
1068
1069static int isicom_tiocmset(struct tty_struct *tty,
1070 unsigned int set, unsigned int clear)
1071{
1072 struct isi_port *port = tty->driver_data;
1073 unsigned long flags;
1074
1075 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1076 return -ENODEV;
1077
1078 spin_lock_irqsave(&port->card->card_lock, flags);
1079 if (set & TIOCM_RTS)
1080 raise_rts(port);
1081 if (set & TIOCM_DTR)
1082 raise_dtr(port);
1083
1084 if (clear & TIOCM_RTS)
1085 drop_rts(port);
1086 if (clear & TIOCM_DTR)
1087 drop_dtr(port);
1088 spin_unlock_irqrestore(&port->card->card_lock, flags);
1089
1090 return 0;
1091}
1092
1093static int isicom_set_serial_info(struct tty_struct *tty,
1094 struct serial_struct *ss)
1095{
1096 struct isi_port *port = tty->driver_data;
1097 int reconfig_port;
1098
1099 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1100 return -ENODEV;
1101
1102 mutex_lock(&port->port.mutex);
1103 reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
1104 (ss->flags & ASYNC_SPD_MASK));
1105
1106 if (!capable(CAP_SYS_ADMIN)) {
1107 if ((ss->close_delay != port->port.close_delay) ||
1108 (ss->closing_wait != port->port.closing_wait) ||
1109 ((ss->flags & ~ASYNC_USR_MASK) !=
1110 (port->port.flags & ~ASYNC_USR_MASK))) {
1111 mutex_unlock(&port->port.mutex);
1112 return -EPERM;
1113 }
1114 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1115 (ss->flags & ASYNC_USR_MASK));
1116 } else {
1117 port->port.close_delay = ss->close_delay;
1118 port->port.closing_wait = ss->closing_wait;
1119 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1120 (ss->flags & ASYNC_FLAGS));
1121 }
1122 if (reconfig_port) {
1123 unsigned long flags;
1124 spin_lock_irqsave(&port->card->card_lock, flags);
1125 isicom_config_port(tty);
1126 spin_unlock_irqrestore(&port->card->card_lock, flags);
1127 }
1128 mutex_unlock(&port->port.mutex);
1129 return 0;
1130}
1131
1132static int isicom_get_serial_info(struct tty_struct *tty,
1133 struct serial_struct *ss)
1134{
1135 struct isi_port *port = tty->driver_data;
1136
1137 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1138 return -ENODEV;
1139
1140 mutex_lock(&port->port.mutex);
1141/* ss->type = ? */
1142 ss->line = port - isi_ports;
1143 ss->port = port->card->base;
1144 ss->irq = port->card->irq;
1145 ss->flags = port->port.flags;
1146/* ss->baud_base = ? */
1147 ss->close_delay = port->port.close_delay;
1148 ss->closing_wait = port->port.closing_wait;
1149 mutex_unlock(&port->port.mutex);
1150 return 0;
1151}
1152
1153/* set_termios et all */
1154static void isicom_set_termios(struct tty_struct *tty,
1155 struct ktermios *old_termios)
1156{
1157 struct isi_port *port = tty->driver_data;
1158 unsigned long flags;
1159
1160 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1161 return;
1162
1163 if (tty->termios.c_cflag == old_termios->c_cflag &&
1164 tty->termios.c_iflag == old_termios->c_iflag)
1165 return;
1166
1167 spin_lock_irqsave(&port->card->card_lock, flags);
1168 isicom_config_port(tty);
1169 spin_unlock_irqrestore(&port->card->card_lock, flags);
1170
1171 if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
1172 tty->hw_stopped = 0;
1173 isicom_start(tty);
1174 }
1175}
1176
1177/* throttle et all */
1178static void isicom_throttle(struct tty_struct *tty)
1179{
1180 struct isi_port *port = tty->driver_data;
1181 struct isi_board *card = port->card;
1182
1183 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1184 return;
1185
1186 /* tell the card that this port cannot handle any more data for now */
1187 card->port_status &= ~(1 << port->channel);
1188 outw(card->port_status, card->base + 0x02);
1189}
1190
1191/* unthrottle et all */
1192static void isicom_unthrottle(struct tty_struct *tty)
1193{
1194 struct isi_port *port = tty->driver_data;
1195 struct isi_board *card = port->card;
1196
1197 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1198 return;
1199
1200 /* tell the card that this port is ready to accept more data */
1201 card->port_status |= (1 << port->channel);
1202 outw(card->port_status, card->base + 0x02);
1203}
1204
1205/* stop et all */
1206static void isicom_stop(struct tty_struct *tty)
1207{
1208 struct isi_port *port = tty->driver_data;
1209
1210 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1211 return;
1212
1213 /* this tells the transmitter not to consider this port for
1214 data output to the card. */
1215 port->status &= ~ISI_TXOK;
1216}
1217
1218/* start et all */
1219static void isicom_start(struct tty_struct *tty)
1220{
1221 struct isi_port *port = tty->driver_data;
1222
1223 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1224 return;
1225
1226 /* this tells the transmitter to consider this port for
1227 data output to the card. */
1228 port->status |= ISI_TXOK;
1229}
1230
1231static void isicom_hangup(struct tty_struct *tty)
1232{
1233 struct isi_port *port = tty->driver_data;
1234
1235 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1236 return;
1237 tty_port_hangup(&port->port);
1238}
1239
1240
1241/*
1242 * Driver init and deinit functions
1243 */
1244
1245static const struct tty_operations isicom_ops = {
1246 .open = isicom_open,
1247 .close = isicom_close,
1248 .write = isicom_write,
1249 .put_char = isicom_put_char,
1250 .flush_chars = isicom_flush_chars,
1251 .write_room = isicom_write_room,
1252 .chars_in_buffer = isicom_chars_in_buffer,
1253 .set_termios = isicom_set_termios,
1254 .throttle = isicom_throttle,
1255 .unthrottle = isicom_unthrottle,
1256 .stop = isicom_stop,
1257 .start = isicom_start,
1258 .hangup = isicom_hangup,
1259 .flush_buffer = isicom_flush_buffer,
1260 .tiocmget = isicom_tiocmget,
1261 .tiocmset = isicom_tiocmset,
1262 .break_ctl = isicom_send_break,
1263 .get_serial = isicom_get_serial_info,
1264 .set_serial = isicom_set_serial_info,
1265};
1266
1267static const struct tty_port_operations isicom_port_ops = {
1268 .carrier_raised = isicom_carrier_raised,
1269 .dtr_rts = isicom_dtr_rts,
1270 .activate = isicom_activate,
1271 .shutdown = isicom_shutdown,
1272};
1273
1274static int reset_card(struct pci_dev *pdev,
1275 const unsigned int card, unsigned int *signature)
1276{
1277 struct isi_board *board = pci_get_drvdata(pdev);
1278 unsigned long base = board->base;
1279 unsigned int sig, portcount = 0;
1280 int retval = 0;
1281
1282 dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1283 base);
1284
1285 inw(base + 0x8);
1286
1287 msleep(10);
1288
1289 outw(0, base + 0x8); /* Reset */
1290
1291 msleep(1000);
1292
1293 sig = inw(base + 0x4) & 0xff;
1294
1295 if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1296 sig != 0xee) {
1297 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1298 "bad I/O Port Address 0x%lx).\n", card + 1, base);
1299 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1300 retval = -EIO;
1301 goto end;
1302 }
1303
1304 msleep(10);
1305
1306 portcount = inw(base + 0x2);
1307 if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1308 portcount != 8 && portcount != 16)) {
1309 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1310 card + 1);
1311 retval = -EIO;
1312 goto end;
1313 }
1314
1315 switch (sig) {
1316 case 0xa5:
1317 case 0xbb:
1318 case 0xdd:
1319 board->port_count = (portcount == 4) ? 4 : 8;
1320 board->shift_count = 12;
1321 break;
1322 case 0xcc:
1323 case 0xee:
1324 board->port_count = 16;
1325 board->shift_count = 11;
1326 break;
1327 }
1328 dev_info(&pdev->dev, "-Done\n");
1329 *signature = sig;
1330
1331end:
1332 return retval;
1333}
1334
1335static int load_firmware(struct pci_dev *pdev,
1336 const unsigned int index, const unsigned int signature)
1337{
1338 struct isi_board *board = pci_get_drvdata(pdev);
1339 const struct firmware *fw;
1340 unsigned long base = board->base;
1341 unsigned int a;
1342 u16 word_count, status;
1343 int retval = -EIO;
1344 char *name;
1345 u8 *data;
1346
1347 struct stframe {
1348 u16 addr;
1349 u16 count;
1350 u8 data[0];
1351 } *frame;
1352
1353 switch (signature) {
1354 case 0xa5:
1355 name = "isi608.bin";
1356 break;
1357 case 0xbb:
1358 name = "isi608em.bin";
1359 break;
1360 case 0xcc:
1361 name = "isi616em.bin";
1362 break;
1363 case 0xdd:
1364 name = "isi4608.bin";
1365 break;
1366 case 0xee:
1367 name = "isi4616.bin";
1368 break;
1369 default:
1370 dev_err(&pdev->dev, "Unknown signature.\n");
1371 goto end;
1372 }
1373
1374 retval = request_firmware(&fw, name, &pdev->dev);
1375 if (retval)
1376 goto end;
1377
1378 retval = -EIO;
1379
1380 for (frame = (struct stframe *)fw->data;
1381 frame < (struct stframe *)(fw->data + fw->size);
1382 frame = (struct stframe *)((u8 *)(frame + 1) +
1383 frame->count)) {
1384 if (WaitTillCardIsFree(base))
1385 goto errrelfw;
1386
1387 outw(0xf0, base); /* start upload sequence */
1388 outw(0x00, base);
1389 outw(frame->addr, base); /* lsb of address */
1390
1391 word_count = frame->count / 2 + frame->count % 2;
1392 outw(word_count, base);
1393 InterruptTheCard(base);
1394
1395 udelay(100); /* 0x2f */
1396
1397 if (WaitTillCardIsFree(base))
1398 goto errrelfw;
1399
1400 status = inw(base + 0x4);
1401 if (status != 0) {
1402 dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1403 "Address:0x%x\n"
1404 "Count:0x%x\n"
1405 "Status:0x%x\n",
1406 index + 1, frame->addr, frame->count, status);
1407 goto errrelfw;
1408 }
1409 outsw(base, frame->data, word_count);
1410
1411 InterruptTheCard(base);
1412
1413 udelay(50); /* 0x0f */
1414
1415 if (WaitTillCardIsFree(base))
1416 goto errrelfw;
1417
1418 status = inw(base + 0x4);
1419 if (status != 0) {
1420 dev_err(&pdev->dev, "Card%d got out of sync.Card "
1421 "Status:0x%x\n", index + 1, status);
1422 goto errrelfw;
1423 }
1424 }
1425
1426/* XXX: should we test it by reading it back and comparing with original like
1427 * in load firmware package? */
1428 for (frame = (struct stframe *)fw->data;
1429 frame < (struct stframe *)(fw->data + fw->size);
1430 frame = (struct stframe *)((u8 *)(frame + 1) +
1431 frame->count)) {
1432 if (WaitTillCardIsFree(base))
1433 goto errrelfw;
1434
1435 outw(0xf1, base); /* start download sequence */
1436 outw(0x00, base);
1437 outw(frame->addr, base); /* lsb of address */
1438
1439 word_count = (frame->count >> 1) + frame->count % 2;
1440 outw(word_count + 1, base);
1441 InterruptTheCard(base);
1442
1443 udelay(50); /* 0xf */
1444
1445 if (WaitTillCardIsFree(base))
1446 goto errrelfw;
1447
1448 status = inw(base + 0x4);
1449 if (status != 0) {
1450 dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1451 "Address:0x%x\n"
1452 "Count:0x%x\n"
1453 "Status: 0x%x\n",
1454 index + 1, frame->addr, frame->count, status);
1455 goto errrelfw;
1456 }
1457
1458 data = kmalloc_array(word_count, 2, GFP_KERNEL);
1459 if (data == NULL) {
1460 dev_err(&pdev->dev, "Card%d, firmware upload "
1461 "failed, not enough memory\n", index + 1);
1462 goto errrelfw;
1463 }
1464 inw(base);
1465 insw(base, data, word_count);
1466 InterruptTheCard(base);
1467
1468 for (a = 0; a < frame->count; a++)
1469 if (data[a] != frame->data[a]) {
1470 kfree(data);
1471 dev_err(&pdev->dev, "Card%d, firmware upload "
1472 "failed\n", index + 1);
1473 goto errrelfw;
1474 }
1475 kfree(data);
1476
1477 udelay(50); /* 0xf */
1478
1479 if (WaitTillCardIsFree(base))
1480 goto errrelfw;
1481
1482 status = inw(base + 0x4);
1483 if (status != 0) {
1484 dev_err(&pdev->dev, "Card%d verify got out of sync. "
1485 "Card Status:0x%x\n", index + 1, status);
1486 goto errrelfw;
1487 }
1488 }
1489
1490 /* xfer ctrl */
1491 if (WaitTillCardIsFree(base))
1492 goto errrelfw;
1493
1494 outw(0xf2, base);
1495 outw(0x800, base);
1496 outw(0x0, base);
1497 outw(0x0, base);
1498 InterruptTheCard(base);
1499 outw(0x0, base + 0x4); /* for ISI4608 cards */
1500
1501 board->status |= FIRMWARE_LOADED;
1502 retval = 0;
1503
1504errrelfw:
1505 release_firmware(fw);
1506end:
1507 return retval;
1508}
1509
1510/*
1511 * Insmod can set static symbols so keep these static
1512 */
1513static unsigned int card_count;
1514
1515static int isicom_probe(struct pci_dev *pdev,
1516 const struct pci_device_id *ent)
1517{
1518 unsigned int uninitialized_var(signature), index;
1519 int retval = -EPERM;
1520 struct isi_board *board = NULL;
1521
1522 if (card_count >= BOARD_COUNT)
1523 goto err;
1524
1525 retval = pci_enable_device(pdev);
1526 if (retval) {
1527 dev_err(&pdev->dev, "failed to enable\n");
1528 goto err;
1529 }
1530
1531 dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1532
1533 /* allot the first empty slot in the array */
1534 for (index = 0; index < BOARD_COUNT; index++) {
1535 if (isi_card[index].base == 0) {
1536 board = &isi_card[index];
1537 break;
1538 }
1539 }
1540 if (index == BOARD_COUNT) {
1541 retval = -ENODEV;
1542 goto err_disable;
1543 }
1544
1545 board->index = index;
1546 board->base = pci_resource_start(pdev, 3);
1547 board->irq = pdev->irq;
1548 card_count++;
1549
1550 pci_set_drvdata(pdev, board);
1551
1552 retval = pci_request_region(pdev, 3, ISICOM_NAME);
1553 if (retval) {
1554 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1555 "will be disabled.\n", board->base, board->base + 15,
1556 index + 1);
1557 retval = -EBUSY;
1558 goto errdec;
1559 }
1560
1561 retval = request_irq(board->irq, isicom_interrupt,
1562 IRQF_SHARED, ISICOM_NAME, board);
1563 if (retval < 0) {
1564 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1565 "Card%d will be disabled.\n", board->irq, index + 1);
1566 goto errunrr;
1567 }
1568
1569 retval = reset_card(pdev, index, &signature);
1570 if (retval < 0)
1571 goto errunri;
1572
1573 retval = load_firmware(pdev, index, signature);
1574 if (retval < 0)
1575 goto errunri;
1576
1577 for (index = 0; index < board->port_count; index++) {
1578 struct tty_port *tport = &board->ports[index].port;
1579 tty_port_init(tport);
1580 tport->ops = &isicom_port_ops;
1581 tport->close_delay = 50 * HZ/100;
1582 tport->closing_wait = 3000 * HZ/100;
1583 tty_port_register_device(tport, isicom_normal,
1584 board->index * 16 + index, &pdev->dev);
1585 }
1586
1587 return 0;
1588
1589errunri:
1590 free_irq(board->irq, board);
1591errunrr:
1592 pci_release_region(pdev, 3);
1593errdec:
1594 board->base = 0;
1595 card_count--;
1596err_disable:
1597 pci_disable_device(pdev);
1598err:
1599 return retval;
1600}
1601
1602static void isicom_remove(struct pci_dev *pdev)
1603{
1604 struct isi_board *board = pci_get_drvdata(pdev);
1605 unsigned int i;
1606
1607 for (i = 0; i < board->port_count; i++) {
1608 tty_unregister_device(isicom_normal, board->index * 16 + i);
1609 tty_port_destroy(&board->ports[i].port);
1610 }
1611
1612 free_irq(board->irq, board);
1613 pci_release_region(pdev, 3);
1614 board->base = 0;
1615 card_count--;
1616 pci_disable_device(pdev);
1617}
1618
1619static int __init isicom_init(void)
1620{
1621 int retval, idx, channel;
1622 struct isi_port *port;
1623
1624 for (idx = 0; idx < BOARD_COUNT; idx++) {
1625 port = &isi_ports[idx * 16];
1626 isi_card[idx].ports = port;
1627 spin_lock_init(&isi_card[idx].card_lock);
1628 for (channel = 0; channel < 16; channel++, port++) {
1629 port->magic = ISICOM_MAGIC;
1630 port->card = &isi_card[idx];
1631 port->channel = channel;
1632 port->status = 0;
1633 /* . . . */
1634 }
1635 isi_card[idx].base = 0;
1636 isi_card[idx].irq = 0;
1637 }
1638
1639 /* tty driver structure initialization */
1640 isicom_normal = alloc_tty_driver(PORT_COUNT);
1641 if (!isicom_normal) {
1642 retval = -ENOMEM;
1643 goto error;
1644 }
1645
1646 isicom_normal->name = "ttyM";
1647 isicom_normal->major = ISICOM_NMAJOR;
1648 isicom_normal->minor_start = 0;
1649 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1650 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1651 isicom_normal->init_termios = tty_std_termios;
1652 isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
1653 CLOCAL;
1654 isicom_normal->flags = TTY_DRIVER_REAL_RAW |
1655 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
1656 tty_set_operations(isicom_normal, &isicom_ops);
1657
1658 retval = tty_register_driver(isicom_normal);
1659 if (retval) {
1660 pr_debug("Couldn't register the dialin driver\n");
1661 goto err_puttty;
1662 }
1663
1664 retval = pci_register_driver(&isicom_driver);
1665 if (retval < 0) {
1666 pr_err("Unable to register pci driver.\n");
1667 goto err_unrtty;
1668 }
1669
1670 mod_timer(&tx, jiffies + 1);
1671
1672 return 0;
1673err_unrtty:
1674 tty_unregister_driver(isicom_normal);
1675err_puttty:
1676 put_tty_driver(isicom_normal);
1677error:
1678 return retval;
1679}
1680
1681static void __exit isicom_exit(void)
1682{
1683 del_timer_sync(&tx);
1684
1685 pci_unregister_driver(&isicom_driver);
1686 tty_unregister_driver(isicom_normal);
1687 put_tty_driver(isicom_normal);
1688}
1689
1690module_init(isicom_init);
1691module_exit(isicom_exit);
1692
1693MODULE_AUTHOR("MultiTech");
1694MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1695MODULE_LICENSE("GPL");
1696MODULE_FIRMWARE("isi608.bin");
1697MODULE_FIRMWARE("isi608em.bin");
1698MODULE_FIRMWARE("isi616em.bin");
1699MODULE_FIRMWARE("isi4608.bin");
1700MODULE_FIRMWARE("isi4616.bin");
1701