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Merge branch 'x86-mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6/mini2440.git] / drivers / char / isicom.c
bloba59eac584d1621b3e4824ca3e644d944a31266a6
1 /*
2 * This program is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU General Public License
4 * as published by the Free Software Foundation; either version
5 * 2 of the License, or (at your option) any later version.
6 *
7 * Original driver code supplied by Multi-Tech
8 *
9 * Changes
10 * 1/9/98 alan@lxorguk.ukuu.org.uk
11 * Merge to 2.0.x kernel tree
12 * Obtain and use official major/minors
13 * Loader switched to a misc device
14 * (fixed range check bug as a side effect)
15 * Printk clean up
16 * 9/12/98 alan@lxorguk.ukuu.org.uk
17 * Rough port to 2.1.x
18 *
19 * 10/6/99 sameer Merged the ISA and PCI drivers to
20 * a new unified driver.
21 *
22 * 3/9/99 sameer Added support for ISI4616 cards.
23 *
24 * 16/9/99 sameer We do not force RTS low anymore.
25 * This is to prevent the firmware
26 * from getting confused.
27 *
28 * 26/10/99 sameer Cosmetic changes:The driver now
29 * dumps the Port Count information
30 * along with I/O address and IRQ.
31 *
32 * 13/12/99 sameer Fixed the problem with IRQ sharing.
33 *
34 * 10/5/00 sameer Fixed isicom_shutdown_board()
35 * to not lower DTR on all the ports
36 * when the last port on the card is
37 * closed.
38 *
39 * 10/5/00 sameer Signal mask setup command added
40 * to isicom_setup_port and
41 * isicom_shutdown_port.
42 *
43 * 24/5/00 sameer The driver is now SMP aware.
44 *
45 *
46 * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem
47 *
48 *
49 * 03/01/01 anil .s Added support for resetting the
50 * internal modems on ISI cards.
51 *
52 * 08/02/01 anil .s Upgraded the driver for kernel
53 * 2.4.x
54 *
55 * 11/04/01 Kevin Fixed firmware load problem with
56 * ISIHP-4X card
57 *
58 * 30/04/01 anil .s Fixed the remote login through
59 * ISI port problem. Now the link
60 * does not go down before password
61 * prompt.
62 *
63 * 03/05/01 anil .s Fixed the problem with IRQ sharing
64 * among ISI-PCI cards.
65 *
66 * 03/05/01 anil .s Added support to display the version
67 * info during insmod as well as module
68 * listing by lsmod.
69 *
70 * 10/05/01 anil .s Done the modifications to the source
71 * file and Install script so that the
72 * same installation can be used for
73 * 2.2.x and 2.4.x kernel.
74 *
75 * 06/06/01 anil .s Now we drop both dtr and rts during
76 * shutdown_port as well as raise them
77 * during isicom_config_port.
78 *
79 * 09/06/01 acme@conectiva.com.br use capable, not suser, do
80 * restore_flags on failure in
81 * isicom_send_break, verify put_user
82 * result
83 *
84 * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps
85 * Baud index extended to 21
86 *
87 * 20/03/03 ranjeeth Made to work for Linux Advanced server.
88 * Taken care of license warning.
89 *
90 * 10/12/03 Ravindra Made to work for Fedora Core 1 of
91 * Red Hat Distribution
92 *
93 * 06/01/05 Alan Cox Merged the ISI and base kernel strands
94 * into a single 2.6 driver
95 *
96 * ***********************************************************
97 *
98 * To use this driver you also need the support package. You
99 * can find this in RPM format on
100 * ftp://ftp.linux.org.uk/pub/linux/alan
101 *
102 * You can find the original tools for this direct from Multitech
103 * ftp://ftp.multitech.com/ISI-Cards/
104 *
105 * Having installed the cards the module options (/etc/modprobe.conf)
106 *
107 * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4
108 *
109 * Omit those entries for boards you don't have installed.
110 *
111 * TODO
112 * Merge testing
113 * 64-bit verification
114 */
115
116 #include <linux/module.h>
117 #include <linux/firmware.h>
118 #include <linux/kernel.h>
119 #include <linux/tty.h>
120 #include <linux/tty_flip.h>
121 #include <linux/termios.h>
122 #include <linux/fs.h>
123 #include <linux/sched.h>
124 #include <linux/serial.h>
125 #include <linux/mm.h>
126 #include <linux/interrupt.h>
127 #include <linux/timer.h>
128 #include <linux/delay.h>
129 #include <linux/ioport.h>
130
131 #include <linux/uaccess.h>
132 #include <linux/io.h>
133 #include <asm/system.h>
134
135 #include <linux/pci.h>
136
137 #include <linux/isicom.h>
138
139 #define InterruptTheCard(base) outw(0, (base) + 0xc)
140 #define ClearInterrupt(base) inw((base) + 0x0a)
141
142 #define pr_dbg(str...) pr_debug("ISICOM: " str)
143 #ifdef DEBUG
144 #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
145 #else
146 #define isicom_paranoia_check(a, b, c) 0
147 #endif
148
149 static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
150 static void __devexit isicom_remove(struct pci_dev *);
151
152 static struct pci_device_id isicom_pci_tbl[] = {
153 { PCI_DEVICE(VENDOR_ID, 0x2028) },
154 { PCI_DEVICE(VENDOR_ID, 0x2051) },
155 { PCI_DEVICE(VENDOR_ID, 0x2052) },
156 { PCI_DEVICE(VENDOR_ID, 0x2053) },
157 { PCI_DEVICE(VENDOR_ID, 0x2054) },
158 { PCI_DEVICE(VENDOR_ID, 0x2055) },
159 { PCI_DEVICE(VENDOR_ID, 0x2056) },
160 { PCI_DEVICE(VENDOR_ID, 0x2057) },
161 { PCI_DEVICE(VENDOR_ID, 0x2058) },
162 { 0 }
163 };
164 MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
165
166 static struct pci_driver isicom_driver = {
167 .name = "isicom",
168 .id_table = isicom_pci_tbl,
169 .probe = isicom_probe,
170 .remove = __devexit_p(isicom_remove)
171 };
172
173 static int prev_card = 3; /* start servicing isi_card[0] */
174 static struct tty_driver *isicom_normal;
175
176 static void isicom_tx(unsigned long _data);
177 static void isicom_start(struct tty_struct *tty);
178
179 static DEFINE_TIMER(tx, isicom_tx, 0, 0);
180
181 /* baud index mappings from linux defns to isi */
182
183 static signed char linuxb_to_isib[] = {
184 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
185 };
186
187 struct isi_board {
188 unsigned long base;
189 int irq;
190 unsigned char port_count;
191 unsigned short status;
192 unsigned short port_status; /* each bit for each port */
193 unsigned short shift_count;
194 struct isi_port *ports;
195 signed char count;
196 spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
197 unsigned long flags;
198 unsigned int index;
199 };
200
201 struct isi_port {
202 unsigned short magic;
203 struct tty_port port;
204 u16 channel;
205 u16 status;
206 struct isi_board *card;
207 unsigned char *xmit_buf;
208 int xmit_head;
209 int xmit_tail;
210 int xmit_cnt;
211 };
212
213 static struct isi_board isi_card[BOARD_COUNT];
214 static struct isi_port isi_ports[PORT_COUNT];
215
216 /*
217 * Locking functions for card level locking. We need to own both
218 * the kernel lock for the card and have the card in a position that
219 * it wants to talk.
220 */
221
222 static inline int WaitTillCardIsFree(unsigned long base)
223 {
224 unsigned int count = 0;
225 unsigned int a = in_atomic(); /* do we run under spinlock? */
226
227 while (!(inw(base + 0xe) & 0x1) && count++ < 100)
228 if (a)
229 mdelay(1);
230 else
231 msleep(1);
232
233 return !(inw(base + 0xe) & 0x1);
234 }
235
236 static int lock_card(struct isi_board *card)
237 {
238 unsigned long base = card->base;
239 unsigned int retries, a;
240
241 for (retries = 0; retries < 10; retries++) {
242 spin_lock_irqsave(&card->card_lock, card->flags);
243 for (a = 0; a < 10; a++) {
244 if (inw(base + 0xe) & 0x1)
245 return 1;
246 udelay(10);
247 }
248 spin_unlock_irqrestore(&card->card_lock, card->flags);
249 msleep(10);
250 }
251 printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n",
252 card->base);
253
254 return 0; /* Failed to acquire the card! */
255 }
256
257 static void unlock_card(struct isi_board *card)
258 {
259 spin_unlock_irqrestore(&card->card_lock, card->flags);
260 }
261
262 /*
263 * ISI Card specific ops ...
264 */
265
266 /* card->lock HAS to be held */
267 static void raise_dtr(struct isi_port *port)
268 {
269 struct isi_board *card = port->card;
270 unsigned long base = card->base;
271 u16 channel = port->channel;
272
273 if (WaitTillCardIsFree(base))
274 return;
275
276 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
277 outw(0x0504, base);
278 InterruptTheCard(base);
279 port->status |= ISI_DTR;
280 }
281
282 /* card->lock HAS to be held */
283 static inline void drop_dtr(struct isi_port *port)
284 {
285 struct isi_board *card = port->card;
286 unsigned long base = card->base;
287 u16 channel = port->channel;
288
289 if (WaitTillCardIsFree(base))
290 return;
291
292 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
293 outw(0x0404, base);
294 InterruptTheCard(base);
295 port->status &= ~ISI_DTR;
296 }
297
298 /* card->lock HAS to be held */
299 static inline void raise_rts(struct isi_port *port)
300 {
301 struct isi_board *card = port->card;
302 unsigned long base = card->base;
303 u16 channel = port->channel;
304
305 if (WaitTillCardIsFree(base))
306 return;
307
308 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
309 outw(0x0a04, base);
310 InterruptTheCard(base);
311 port->status |= ISI_RTS;
312 }
313
314 /* card->lock HAS to be held */
315 static inline void drop_rts(struct isi_port *port)
316 {
317 struct isi_board *card = port->card;
318 unsigned long base = card->base;
319 u16 channel = port->channel;
320
321 if (WaitTillCardIsFree(base))
322 return;
323
324 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
325 outw(0x0804, base);
326 InterruptTheCard(base);
327 port->status &= ~ISI_RTS;
328 }
329
330 /* card->lock MUST NOT be held */
331
332 static void isicom_raise_dtr_rts(struct tty_port *port)
333 {
334 struct isi_port *ip = container_of(port, struct isi_port, port);
335 struct isi_board *card = ip->card;
336 unsigned long base = card->base;
337 u16 channel = ip->channel;
338
339 if (!lock_card(card))
340 return;
341
342 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
343 outw(0x0f04, base);
344 InterruptTheCard(base);
345 ip->status |= (ISI_DTR | ISI_RTS);
346 unlock_card(card);
347 }
348
349 /* card->lock HAS to be held */
350 static void drop_dtr_rts(struct isi_port *port)
351 {
352 struct isi_board *card = port->card;
353 unsigned long base = card->base;
354 u16 channel = port->channel;
355
356 if (WaitTillCardIsFree(base))
357 return;
358
359 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
360 outw(0x0c04, base);
361 InterruptTheCard(base);
362 port->status &= ~(ISI_RTS | ISI_DTR);
363 }
364
365 /*
366 * ISICOM Driver specific routines ...
367 *
368 */
369
370 static inline int __isicom_paranoia_check(struct isi_port const *port,
371 char *name, const char *routine)
372 {
373 if (!port) {
374 printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for "
375 "dev %s in %s.\n", name, routine);
376 return 1;
377 }
378 if (port->magic != ISICOM_MAGIC) {
379 printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for "
380 "dev %s in %s.\n", name, routine);
381 return 1;
382 }
383
384 return 0;
385 }
386
387 /*
388 * Transmitter.
389 *
390 * We shovel data into the card buffers on a regular basis. The card
391 * will do the rest of the work for us.
392 */
393
394 static void isicom_tx(unsigned long _data)
395 {
396 unsigned long flags, base;
397 unsigned int retries;
398 short count = (BOARD_COUNT-1), card;
399 short txcount, wrd, residue, word_count, cnt;
400 struct isi_port *port;
401 struct tty_struct *tty;
402
403 /* find next active board */
404 card = (prev_card + 1) & 0x0003;
405 while (count-- > 0) {
406 if (isi_card[card].status & BOARD_ACTIVE)
407 break;
408 card = (card + 1) & 0x0003;
409 }
410 if (!(isi_card[card].status & BOARD_ACTIVE))
411 goto sched_again;
412
413 prev_card = card;
414
415 count = isi_card[card].port_count;
416 port = isi_card[card].ports;
417 base = isi_card[card].base;
418
419 spin_lock_irqsave(&isi_card[card].card_lock, flags);
420 for (retries = 0; retries < 100; retries++) {
421 if (inw(base + 0xe) & 0x1)
422 break;
423 udelay(2);
424 }
425 if (retries >= 100)
426 goto unlock;
427
428 tty = tty_port_tty_get(&port->port);
429 if (tty == NULL)
430 goto put_unlock;
431
432 for (; count > 0; count--, port++) {
433 /* port not active or tx disabled to force flow control */
434 if (!(port->port.flags & ASYNC_INITIALIZED) ||
435 !(port->status & ISI_TXOK))
436 continue;
437
438 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
439 if (txcount <= 0 || tty->stopped || tty->hw_stopped)
440 continue;
441
442 if (!(inw(base + 0x02) & (1 << port->channel)))
443 continue;
444
445 pr_dbg("txing %d bytes, port%d.\n", txcount,
446 port->channel + 1);
447 outw((port->channel << isi_card[card].shift_count) | txcount,
448 base);
449 residue = NO;
450 wrd = 0;
451 while (1) {
452 cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
453 - port->xmit_tail));
454 if (residue == YES) {
455 residue = NO;
456 if (cnt > 0) {
457 wrd |= (port->port.xmit_buf[port->xmit_tail]
458 << 8);
459 port->xmit_tail = (port->xmit_tail + 1)
460 & (SERIAL_XMIT_SIZE - 1);
461 port->xmit_cnt--;
462 txcount--;
463 cnt--;
464 outw(wrd, base);
465 } else {
466 outw(wrd, base);
467 break;
468 }
469 }
470 if (cnt <= 0)
471 break;
472 word_count = cnt >> 1;
473 outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
474 port->xmit_tail = (port->xmit_tail
475 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
476 txcount -= (word_count << 1);
477 port->xmit_cnt -= (word_count << 1);
478 if (cnt & 0x0001) {
479 residue = YES;
480 wrd = port->port.xmit_buf[port->xmit_tail];
481 port->xmit_tail = (port->xmit_tail + 1)
482 & (SERIAL_XMIT_SIZE - 1);
483 port->xmit_cnt--;
484 txcount--;
485 }
486 }
487
488 InterruptTheCard(base);
489 if (port->xmit_cnt <= 0)
490 port->status &= ~ISI_TXOK;
491 if (port->xmit_cnt <= WAKEUP_CHARS)
492 tty_wakeup(tty);
493 }
494
495 put_unlock:
496 tty_kref_put(tty);
497 unlock:
498 spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
499 /* schedule another tx for hopefully in about 10ms */
500 sched_again:
501 mod_timer(&tx, jiffies + msecs_to_jiffies(10));
502 }
503
504 /*
505 * Main interrupt handler routine
506 */
507
508 static irqreturn_t isicom_interrupt(int irq, void *dev_id)
509 {
510 struct isi_board *card = dev_id;
511 struct isi_port *port;
512 struct tty_struct *tty;
513 unsigned long base;
514 u16 header, word_count, count, channel;
515 short byte_count;
516 unsigned char *rp;
517
518 if (!card || !(card->status & FIRMWARE_LOADED))
519 return IRQ_NONE;
520
521 base = card->base;
522
523 /* did the card interrupt us? */
524 if (!(inw(base + 0x0e) & 0x02))
525 return IRQ_NONE;
526
527 spin_lock(&card->card_lock);
528
529 /*
530 * disable any interrupts from the PCI card and lower the
531 * interrupt line
532 */
533 outw(0x8000, base+0x04);
534 ClearInterrupt(base);
535
536 inw(base); /* get the dummy word out */
537 header = inw(base);
538 channel = (header & 0x7800) >> card->shift_count;
539 byte_count = header & 0xff;
540
541 if (channel + 1 > card->port_count) {
542 printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): "
543 "%d(channel) > port_count.\n", base, channel+1);
544 outw(0x0000, base+0x04); /* enable interrupts */
545 spin_unlock(&card->card_lock);
546 return IRQ_HANDLED;
547 }
548 port = card->ports + channel;
549 if (!(port->port.flags & ASYNC_INITIALIZED)) {
550 outw(0x0000, base+0x04); /* enable interrupts */
551 spin_unlock(&card->card_lock);
552 return IRQ_HANDLED;
553 }
554
555 tty = tty_port_tty_get(&port->port);
556 if (tty == NULL) {
557 word_count = byte_count >> 1;
558 while (byte_count > 1) {
559 inw(base);
560 byte_count -= 2;
561 }
562 if (byte_count & 0x01)
563 inw(base);
564 outw(0x0000, base+0x04); /* enable interrupts */
565 spin_unlock(&card->card_lock);
566 return IRQ_HANDLED;
567 }
568
569 if (header & 0x8000) { /* Status Packet */
570 header = inw(base);
571 switch (header & 0xff) {
572 case 0: /* Change in EIA signals */
573 if (port->port.flags & ASYNC_CHECK_CD) {
574 if (port->status & ISI_DCD) {
575 if (!(header & ISI_DCD)) {
576 /* Carrier has been lost */
577 pr_dbg("interrupt: DCD->low.\n"
578 );
579 port->status &= ~ISI_DCD;
580 tty_hangup(tty);
581 }
582 } else if (header & ISI_DCD) {
583 /* Carrier has been detected */
584 pr_dbg("interrupt: DCD->high.\n");
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 (port->port.flags & ASYNC_CTS_FLOW) {
596 if (tty->hw_stopped) {
597 if (header & ISI_CTS) {
598 port->port.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(tty, 0, TTY_BREAK);
630 if (port->port.flags & ASYNC_SAK)
631 do_SAK(tty);
632 tty_flip_buffer_push(tty);
633 break;
634
635 case 2: /* Statistics */
636 pr_dbg("isicom_interrupt: stats!!!.\n");
637 break;
638
639 default:
640 pr_dbg("Intr: Unknown code in status packet.\n");
641 break;
642 }
643 } else { /* Data Packet */
644
645 count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
646 pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count);
647 word_count = count >> 1;
648 insw(base, rp, word_count);
649 byte_count -= (word_count << 1);
650 if (count & 0x0001) {
651 tty_insert_flip_char(tty, inw(base) & 0xff,
652 TTY_NORMAL);
653 byte_count -= 2;
654 }
655 if (byte_count > 0) {
656 pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping "
657 "bytes...\n", base, channel + 1);
658 /* drain out unread xtra data */
659 while (byte_count > 0) {
660 inw(base);
661 byte_count -= 2;
662 }
663 }
664 tty_flip_buffer_push(tty);
665 }
666 outw(0x0000, base+0x04); /* enable interrupts */
667 spin_unlock(&card->card_lock);
668 tty_kref_put(tty);
669
670 return IRQ_HANDLED;
671 }
672
673 static void isicom_config_port(struct tty_struct *tty)
674 {
675 struct isi_port *port = tty->driver_data;
676 struct isi_board *card = port->card;
677 unsigned long baud;
678 unsigned long base = card->base;
679 u16 channel_setup, channel = port->channel,
680 shift_count = card->shift_count;
681 unsigned char flow_ctrl;
682
683 /* FIXME: Switch to new tty baud API */
684 baud = C_BAUD(tty);
685 if (baud & CBAUDEX) {
686 baud &= ~CBAUDEX;
687
688 /* if CBAUDEX bit is on and the baud is set to either 50 or 75
689 * then the card is programmed for 57.6Kbps or 115Kbps
690 * respectively.
691 */
692
693 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
694 if (baud < 1 || baud > 4)
695 tty->termios->c_cflag &= ~CBAUDEX;
696 else
697 baud += 15;
698 }
699 if (baud == 15) {
700
701 /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
702 * by the set_serial_info ioctl ... this is done by
703 * the 'setserial' utility.
704 */
705
706 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
707 baud++; /* 57.6 Kbps */
708 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
709 baud += 2; /* 115 Kbps */
710 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
711 baud += 3; /* 230 kbps*/
712 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
713 baud += 4; /* 460 kbps*/
714 }
715 if (linuxb_to_isib[baud] == -1) {
716 /* hang up */
717 drop_dtr(port);
718 return;
719 } else
720 raise_dtr(port);
721
722 if (WaitTillCardIsFree(base) == 0) {
723 outw(0x8000 | (channel << shift_count) | 0x03, base);
724 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
725 channel_setup = 0;
726 switch (C_CSIZE(tty)) {
727 case CS5:
728 channel_setup |= ISICOM_CS5;
729 break;
730 case CS6:
731 channel_setup |= ISICOM_CS6;
732 break;
733 case CS7:
734 channel_setup |= ISICOM_CS7;
735 break;
736 case CS8:
737 channel_setup |= ISICOM_CS8;
738 break;
739 }
740
741 if (C_CSTOPB(tty))
742 channel_setup |= ISICOM_2SB;
743 if (C_PARENB(tty)) {
744 channel_setup |= ISICOM_EVPAR;
745 if (C_PARODD(tty))
746 channel_setup |= ISICOM_ODPAR;
747 }
748 outw(channel_setup, base);
749 InterruptTheCard(base);
750 }
751 if (C_CLOCAL(tty))
752 port->port.flags &= ~ASYNC_CHECK_CD;
753 else
754 port->port.flags |= ASYNC_CHECK_CD;
755
756 /* flow control settings ...*/
757 flow_ctrl = 0;
758 port->port.flags &= ~ASYNC_CTS_FLOW;
759 if (C_CRTSCTS(tty)) {
760 port->port.flags |= ASYNC_CTS_FLOW;
761 flow_ctrl |= ISICOM_CTSRTS;
762 }
763 if (I_IXON(tty))
764 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
765 if (I_IXOFF(tty))
766 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
767
768 if (WaitTillCardIsFree(base) == 0) {
769 outw(0x8000 | (channel << shift_count) | 0x04, base);
770 outw(flow_ctrl << 8 | 0x05, base);
771 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
772 InterruptTheCard(base);
773 }
774
775 /* rx enabled -> enable port for rx on the card */
776 if (C_CREAD(tty)) {
777 card->port_status |= (1 << channel);
778 outw(card->port_status, base + 0x02);
779 }
780 }
781
782 /* open et all */
783
784 static inline void isicom_setup_board(struct isi_board *bp)
785 {
786 int channel;
787 struct isi_port *port;
788 unsigned long flags;
789
790 spin_lock_irqsave(&bp->card_lock, flags);
791 if (bp->status & BOARD_ACTIVE) {
792 spin_unlock_irqrestore(&bp->card_lock, flags);
793 return;
794 }
795 port = bp->ports;
796 bp->status |= BOARD_ACTIVE;
797 for (channel = 0; channel < bp->port_count; channel++, port++)
798 drop_dtr_rts(port);
799 spin_unlock_irqrestore(&bp->card_lock, flags);
800 }
801
802 static int isicom_setup_port(struct tty_struct *tty)
803 {
804 struct isi_port *port = tty->driver_data;
805 struct isi_board *card = port->card;
806 unsigned long flags;
807
808 if (port->port.flags & ASYNC_INITIALIZED)
809 return 0;
810 if (tty_port_alloc_xmit_buf(&port->port) < 0)
811 return -ENOMEM;
812
813 spin_lock_irqsave(&card->card_lock, flags);
814 clear_bit(TTY_IO_ERROR, &tty->flags);
815 if (port->port.count == 1)
816 card->count++;
817
818 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
819
820 /* discard any residual data */
821 if (WaitTillCardIsFree(card->base) == 0) {
822 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
823 card->base);
824 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
825 InterruptTheCard(card->base);
826 }
827
828 isicom_config_port(tty);
829 port->port.flags |= ASYNC_INITIALIZED;
830 spin_unlock_irqrestore(&card->card_lock, flags);
831
832 return 0;
833 }
834
835 static int isicom_carrier_raised(struct tty_port *port)
836 {
837 struct isi_port *ip = container_of(port, struct isi_port, port);
838 return (ip->status & ISI_DCD)?1 : 0;
839 }
840
841 static int isicom_open(struct tty_struct *tty, struct file *filp)
842 {
843 struct isi_port *port;
844 struct isi_board *card;
845 unsigned int board;
846 int error, line;
847
848 line = tty->index;
849 if (line < 0 || line > PORT_COUNT-1)
850 return -ENODEV;
851 board = BOARD(line);
852 card = &isi_card[board];
853
854 if (!(card->status & FIRMWARE_LOADED))
855 return -ENODEV;
856
857 /* open on a port greater than the port count for the card !!! */
858 if (line > ((board * 16) + card->port_count - 1))
859 return -ENODEV;
860
861 port = &isi_ports[line];
862 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
863 return -ENODEV;
864
865 isicom_setup_board(card);
866
867 /* FIXME: locking on port.count etc */
868 port->port.count++;
869 tty->driver_data = port;
870 tty_port_tty_set(&port->port, tty);
871 error = isicom_setup_port(tty);
872 if (error == 0)
873 error = tty_port_block_til_ready(&port->port, tty, filp);
874 return error;
875 }
876
877 /* close et all */
878
879 static inline void isicom_shutdown_board(struct isi_board *bp)
880 {
881 if (bp->status & BOARD_ACTIVE)
882 bp->status &= ~BOARD_ACTIVE;
883 }
884
885 /* card->lock HAS to be held */
886 static void isicom_shutdown_port(struct isi_port *port)
887 {
888 struct isi_board *card = port->card;
889 struct tty_struct *tty;
890
891 tty = tty_port_tty_get(&port->port);
892
893 if (!(port->port.flags & ASYNC_INITIALIZED)) {
894 tty_kref_put(tty);
895 return;
896 }
897
898 tty_port_free_xmit_buf(&port->port);
899 port->port.flags &= ~ASYNC_INITIALIZED;
900 /* 3rd October 2000 : Vinayak P Risbud */
901 tty_port_tty_set(&port->port, NULL);
902
903 /*Fix done by Anil .S on 30-04-2001
904 remote login through isi port has dtr toggle problem
905 due to which the carrier drops before the password prompt
906 appears on the remote end. Now we drop the dtr only if the
907 HUPCL(Hangup on close) flag is set for the tty*/
908
909 if (C_HUPCL(tty))
910 /* drop dtr on this port */
911 drop_dtr(port);
912
913 /* any other port uninits */
914 if (tty)
915 set_bit(TTY_IO_ERROR, &tty->flags);
916
917 if (--card->count < 0) {
918 pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n",
919 card->base, card->count);
920 card->count = 0;
921 }
922
923 /* last port was closed, shutdown that boad too */
924 if (C_HUPCL(tty)) {
925 if (!card->count)
926 isicom_shutdown_board(card);
927 }
928 tty_kref_put(tty);
929 }
930
931 static void isicom_flush_buffer(struct tty_struct *tty)
932 {
933 struct isi_port *port = tty->driver_data;
934 struct isi_board *card = port->card;
935 unsigned long flags;
936
937 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
938 return;
939
940 spin_lock_irqsave(&card->card_lock, flags);
941 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
942 spin_unlock_irqrestore(&card->card_lock, flags);
943
944 tty_wakeup(tty);
945 }
946
947 static void isicom_close(struct tty_struct *tty, struct file *filp)
948 {
949 struct isi_port *ip = tty->driver_data;
950 struct tty_port *port = &ip->port;
951 struct isi_board *card;
952 unsigned long flags;
953
954 BUG_ON(!ip);
955
956 card = ip->card;
957 if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
958 return;
959
960 /* indicate to the card that no more data can be received
961 on this port */
962 spin_lock_irqsave(&card->card_lock, flags);
963 if (port->flags & ASYNC_INITIALIZED) {
964 card->port_status &= ~(1 << ip->channel);
965 outw(card->port_status, card->base + 0x02);
966 }
967 isicom_shutdown_port(ip);
968 spin_unlock_irqrestore(&card->card_lock, flags);
969
970 isicom_flush_buffer(tty);
971
972 tty_port_close_end(port, tty);
973 }
974
975 /* write et all */
976 static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
977 int count)
978 {
979 struct isi_port *port = tty->driver_data;
980 struct isi_board *card = port->card;
981 unsigned long flags;
982 int cnt, total = 0;
983
984 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
985 return 0;
986
987 spin_lock_irqsave(&card->card_lock, flags);
988
989 while (1) {
990 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
991 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
992 if (cnt <= 0)
993 break;
994
995 memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
996 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
997 - 1);
998 port->xmit_cnt += cnt;
999 buf += cnt;
1000 count -= cnt;
1001 total += cnt;
1002 }
1003 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
1004 port->status |= ISI_TXOK;
1005 spin_unlock_irqrestore(&card->card_lock, flags);
1006 return total;
1007 }
1008
1009 /* put_char et all */
1010 static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
1011 {
1012 struct isi_port *port = tty->driver_data;
1013 struct isi_board *card = port->card;
1014 unsigned long flags;
1015
1016 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
1017 return 0;
1018
1019 spin_lock_irqsave(&card->card_lock, flags);
1020 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
1021 spin_unlock_irqrestore(&card->card_lock, flags);
1022 return 0;
1023 }
1024
1025 port->port.xmit_buf[port->xmit_head++] = ch;
1026 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
1027 port->xmit_cnt++;
1028 spin_unlock_irqrestore(&card->card_lock, flags);
1029 return 1;
1030 }
1031
1032 /* flush_chars et all */
1033 static void isicom_flush_chars(struct tty_struct *tty)
1034 {
1035 struct isi_port *port = tty->driver_data;
1036
1037 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1038 return;
1039
1040 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1041 !port->port.xmit_buf)
1042 return;
1043
1044 /* this tells the transmitter to consider this port for
1045 data output to the card ... that's the best we can do. */
1046 port->status |= ISI_TXOK;
1047 }
1048
1049 /* write_room et all */
1050 static int isicom_write_room(struct tty_struct *tty)
1051 {
1052 struct isi_port *port = tty->driver_data;
1053 int free;
1054
1055 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1056 return 0;
1057
1058 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1059 if (free < 0)
1060 free = 0;
1061 return free;
1062 }
1063
1064 /* chars_in_buffer et all */
1065 static int isicom_chars_in_buffer(struct tty_struct *tty)
1066 {
1067 struct isi_port *port = tty->driver_data;
1068 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1069 return 0;
1070 return port->xmit_cnt;
1071 }
1072
1073 /* ioctl et all */
1074 static int isicom_send_break(struct tty_struct *tty, int length)
1075 {
1076 struct isi_port *port = tty->driver_data;
1077 struct isi_board *card = port->card;
1078 unsigned long base = card->base;
1079
1080 if (length == -1)
1081 return -EOPNOTSUPP;
1082
1083 if (!lock_card(card))
1084 return -EINVAL;
1085
1086 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1087 outw((length & 0xff) << 8 | 0x00, base);
1088 outw((length & 0xff00), base);
1089 InterruptTheCard(base);
1090
1091 unlock_card(card);
1092 return 0;
1093 }
1094
1095 static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
1096 {
1097 struct isi_port *port = tty->driver_data;
1098 /* just send the port status */
1099 u16 status = port->status;
1100
1101 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1102 return -ENODEV;
1103
1104 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1105 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1106 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1107 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1108 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1109 ((status & ISI_RI ) ? TIOCM_RI : 0);
1110 }
1111
1112 static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
1113 unsigned int set, unsigned int clear)
1114 {
1115 struct isi_port *port = tty->driver_data;
1116 unsigned long flags;
1117
1118 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1119 return -ENODEV;
1120
1121 spin_lock_irqsave(&port->card->card_lock, flags);
1122 if (set & TIOCM_RTS)
1123 raise_rts(port);
1124 if (set & TIOCM_DTR)
1125 raise_dtr(port);
1126
1127 if (clear & TIOCM_RTS)
1128 drop_rts(port);
1129 if (clear & TIOCM_DTR)
1130 drop_dtr(port);
1131 spin_unlock_irqrestore(&port->card->card_lock, flags);
1132
1133 return 0;
1134 }
1135
1136 static int isicom_set_serial_info(struct tty_struct *tty,
1137 struct serial_struct __user *info)
1138 {
1139 struct isi_port *port = tty->driver_data;
1140 struct serial_struct newinfo;
1141 int reconfig_port;
1142
1143 if (copy_from_user(&newinfo, info, sizeof(newinfo)))
1144 return -EFAULT;
1145
1146 lock_kernel();
1147
1148 reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
1149 (newinfo.flags & ASYNC_SPD_MASK));
1150
1151 if (!capable(CAP_SYS_ADMIN)) {
1152 if ((newinfo.close_delay != port->port.close_delay) ||
1153 (newinfo.closing_wait != port->port.closing_wait) ||
1154 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1155 (port->port.flags & ~ASYNC_USR_MASK))) {
1156 unlock_kernel();
1157 return -EPERM;
1158 }
1159 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1160 (newinfo.flags & ASYNC_USR_MASK));
1161 } else {
1162 port->port.close_delay = newinfo.close_delay;
1163 port->port.closing_wait = newinfo.closing_wait;
1164 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1165 (newinfo.flags & ASYNC_FLAGS));
1166 }
1167 if (reconfig_port) {
1168 unsigned long flags;
1169 spin_lock_irqsave(&port->card->card_lock, flags);
1170 isicom_config_port(tty);
1171 spin_unlock_irqrestore(&port->card->card_lock, flags);
1172 }
1173 unlock_kernel();
1174 return 0;
1175 }
1176
1177 static int isicom_get_serial_info(struct isi_port *port,
1178 struct serial_struct __user *info)
1179 {
1180 struct serial_struct out_info;
1181
1182 lock_kernel();
1183 memset(&out_info, 0, sizeof(out_info));
1184 /* out_info.type = ? */
1185 out_info.line = port - isi_ports;
1186 out_info.port = port->card->base;
1187 out_info.irq = port->card->irq;
1188 out_info.flags = port->port.flags;
1189 /* out_info.baud_base = ? */
1190 out_info.close_delay = port->port.close_delay;
1191 out_info.closing_wait = port->port.closing_wait;
1192 unlock_kernel();
1193 if (copy_to_user(info, &out_info, sizeof(out_info)))
1194 return -EFAULT;
1195 return 0;
1196 }
1197
1198 static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
1199 unsigned int cmd, unsigned long arg)
1200 {
1201 struct isi_port *port = tty->driver_data;
1202 void __user *argp = (void __user *)arg;
1203
1204 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1205 return -ENODEV;
1206
1207 switch (cmd) {
1208 case TIOCGSERIAL:
1209 return isicom_get_serial_info(port, argp);
1210
1211 case TIOCSSERIAL:
1212 return isicom_set_serial_info(tty, argp);
1213
1214 default:
1215 return -ENOIOCTLCMD;
1216 }
1217 return 0;
1218 }
1219
1220 /* set_termios et all */
1221 static void isicom_set_termios(struct tty_struct *tty,
1222 struct ktermios *old_termios)
1223 {
1224 struct isi_port *port = tty->driver_data;
1225 unsigned long flags;
1226
1227 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1228 return;
1229
1230 if (tty->termios->c_cflag == old_termios->c_cflag &&
1231 tty->termios->c_iflag == old_termios->c_iflag)
1232 return;
1233
1234 spin_lock_irqsave(&port->card->card_lock, flags);
1235 isicom_config_port(tty);
1236 spin_unlock_irqrestore(&port->card->card_lock, flags);
1237
1238 if ((old_termios->c_cflag & CRTSCTS) &&
1239 !(tty->termios->c_cflag & CRTSCTS)) {
1240 tty->hw_stopped = 0;
1241 isicom_start(tty);
1242 }
1243 }
1244
1245 /* throttle et all */
1246 static void isicom_throttle(struct tty_struct *tty)
1247 {
1248 struct isi_port *port = tty->driver_data;
1249 struct isi_board *card = port->card;
1250
1251 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1252 return;
1253
1254 /* tell the card that this port cannot handle any more data for now */
1255 card->port_status &= ~(1 << port->channel);
1256 outw(card->port_status, card->base + 0x02);
1257 }
1258
1259 /* unthrottle et all */
1260 static void isicom_unthrottle(struct tty_struct *tty)
1261 {
1262 struct isi_port *port = tty->driver_data;
1263 struct isi_board *card = port->card;
1264
1265 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1266 return;
1267
1268 /* tell the card that this port is ready to accept more data */
1269 card->port_status |= (1 << port->channel);
1270 outw(card->port_status, card->base + 0x02);
1271 }
1272
1273 /* stop et all */
1274 static void isicom_stop(struct tty_struct *tty)
1275 {
1276 struct isi_port *port = tty->driver_data;
1277
1278 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1279 return;
1280
1281 /* this tells the transmitter not to consider this port for
1282 data output to the card. */
1283 port->status &= ~ISI_TXOK;
1284 }
1285
1286 /* start et all */
1287 static void isicom_start(struct tty_struct *tty)
1288 {
1289 struct isi_port *port = tty->driver_data;
1290
1291 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1292 return;
1293
1294 /* this tells the transmitter to consider this port for
1295 data output to the card. */
1296 port->status |= ISI_TXOK;
1297 }
1298
1299 static void isicom_hangup(struct tty_struct *tty)
1300 {
1301 struct isi_port *port = tty->driver_data;
1302 unsigned long flags;
1303
1304 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1305 return;
1306
1307 spin_lock_irqsave(&port->card->card_lock, flags);
1308 isicom_shutdown_port(port);
1309 spin_unlock_irqrestore(&port->card->card_lock, flags);
1310
1311 tty_port_hangup(&port->port);
1312 }
1313
1314
1315 /*
1316 * Driver init and deinit functions
1317 */
1318
1319 static const struct tty_operations isicom_ops = {
1320 .open = isicom_open,
1321 .close = isicom_close,
1322 .write = isicom_write,
1323 .put_char = isicom_put_char,
1324 .flush_chars = isicom_flush_chars,
1325 .write_room = isicom_write_room,
1326 .chars_in_buffer = isicom_chars_in_buffer,
1327 .ioctl = isicom_ioctl,
1328 .set_termios = isicom_set_termios,
1329 .throttle = isicom_throttle,
1330 .unthrottle = isicom_unthrottle,
1331 .stop = isicom_stop,
1332 .start = isicom_start,
1333 .hangup = isicom_hangup,
1334 .flush_buffer = isicom_flush_buffer,
1335 .tiocmget = isicom_tiocmget,
1336 .tiocmset = isicom_tiocmset,
1337 .break_ctl = isicom_send_break,
1338 };
1339
1340 static const struct tty_port_operations isicom_port_ops = {
1341 .carrier_raised = isicom_carrier_raised,
1342 .raise_dtr_rts = isicom_raise_dtr_rts,
1343 };
1344
1345 static int __devinit reset_card(struct pci_dev *pdev,
1346 const unsigned int card, unsigned int *signature)
1347 {
1348 struct isi_board *board = pci_get_drvdata(pdev);
1349 unsigned long base = board->base;
1350 unsigned int sig, portcount = 0;
1351 int retval = 0;
1352
1353 dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1354 base);
1355
1356 inw(base + 0x8);
1357
1358 msleep(10);
1359
1360 outw(0, base + 0x8); /* Reset */
1361
1362 msleep(1000);
1363
1364 sig = inw(base + 0x4) & 0xff;
1365
1366 if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1367 sig != 0xee) {
1368 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1369 "bad I/O Port Address 0x%lx).\n", card + 1, base);
1370 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1371 retval = -EIO;
1372 goto end;
1373 }
1374
1375 msleep(10);
1376
1377 portcount = inw(base + 0x2);
1378 if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1379 portcount != 8 && portcount != 16)) {
1380 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1381 card + 1);
1382 retval = -EIO;
1383 goto end;
1384 }
1385
1386 switch (sig) {
1387 case 0xa5:
1388 case 0xbb:
1389 case 0xdd:
1390 board->port_count = (portcount == 4) ? 4 : 8;
1391 board->shift_count = 12;
1392 break;
1393 case 0xcc:
1394 case 0xee:
1395 board->port_count = 16;
1396 board->shift_count = 11;
1397 break;
1398 }
1399 dev_info(&pdev->dev, "-Done\n");
1400 *signature = sig;
1401
1402 end:
1403 return retval;
1404 }
1405
1406 static int __devinit load_firmware(struct pci_dev *pdev,
1407 const unsigned int index, const unsigned int signature)
1408 {
1409 struct isi_board *board = pci_get_drvdata(pdev);
1410 const struct firmware *fw;
1411 unsigned long base = board->base;
1412 unsigned int a;
1413 u16 word_count, status;
1414 int retval = -EIO;
1415 char *name;
1416 u8 *data;
1417
1418 struct stframe {
1419 u16 addr;
1420 u16 count;
1421 u8 data[0];
1422 } *frame;
1423
1424 switch (signature) {
1425 case 0xa5:
1426 name = "isi608.bin";
1427 break;
1428 case 0xbb:
1429 name = "isi608em.bin";
1430 break;
1431 case 0xcc:
1432 name = "isi616em.bin";
1433 break;
1434 case 0xdd:
1435 name = "isi4608.bin";
1436 break;
1437 case 0xee:
1438 name = "isi4616.bin";
1439 break;
1440 default:
1441 dev_err(&pdev->dev, "Unknown signature.\n");
1442 goto end;
1443 }
1444
1445 retval = request_firmware(&fw, name, &pdev->dev);
1446 if (retval)
1447 goto end;
1448
1449 retval = -EIO;
1450
1451 for (frame = (struct stframe *)fw->data;
1452 frame < (struct stframe *)(fw->data + fw->size);
1453 frame = (struct stframe *)((u8 *)(frame + 1) +
1454 frame->count)) {
1455 if (WaitTillCardIsFree(base))
1456 goto errrelfw;
1457
1458 outw(0xf0, base); /* start upload sequence */
1459 outw(0x00, base);
1460 outw(frame->addr, base); /* lsb of address */
1461
1462 word_count = frame->count / 2 + frame->count % 2;
1463 outw(word_count, base);
1464 InterruptTheCard(base);
1465
1466 udelay(100); /* 0x2f */
1467
1468 if (WaitTillCardIsFree(base))
1469 goto errrelfw;
1470
1471 status = inw(base + 0x4);
1472 if (status != 0) {
1473 dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1474 KERN_WARNING "Address:0x%x\n"
1475 KERN_WARNING "Count:0x%x\n"
1476 KERN_WARNING "Status:0x%x\n",
1477 index + 1, frame->addr, frame->count, status);
1478 goto errrelfw;
1479 }
1480 outsw(base, frame->data, word_count);
1481
1482 InterruptTheCard(base);
1483
1484 udelay(50); /* 0x0f */
1485
1486 if (WaitTillCardIsFree(base))
1487 goto errrelfw;
1488
1489 status = inw(base + 0x4);
1490 if (status != 0) {
1491 dev_err(&pdev->dev, "Card%d got out of sync.Card "
1492 "Status:0x%x\n", index + 1, status);
1493 goto errrelfw;
1494 }
1495 }
1496
1497 /* XXX: should we test it by reading it back and comparing with original like
1498 * in load firmware package? */
1499 for (frame = (struct stframe *)fw->data;
1500 frame < (struct stframe *)(fw->data + fw->size);
1501 frame = (struct stframe *)((u8 *)(frame + 1) +
1502 frame->count)) {
1503 if (WaitTillCardIsFree(base))
1504 goto errrelfw;
1505
1506 outw(0xf1, base); /* start download sequence */
1507 outw(0x00, base);
1508 outw(frame->addr, base); /* lsb of address */
1509
1510 word_count = (frame->count >> 1) + frame->count % 2;
1511 outw(word_count + 1, base);
1512 InterruptTheCard(base);
1513
1514 udelay(50); /* 0xf */
1515
1516 if (WaitTillCardIsFree(base))
1517 goto errrelfw;
1518
1519 status = inw(base + 0x4);
1520 if (status != 0) {
1521 dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1522 KERN_WARNING "Address:0x%x\n"
1523 KERN_WARNING "Count:0x%x\n"
1524 KERN_WARNING "Status: 0x%x\n",
1525 index + 1, frame->addr, frame->count, status);
1526 goto errrelfw;
1527 }
1528
1529 data = kmalloc(word_count * 2, GFP_KERNEL);
1530 if (data == NULL) {
1531 dev_err(&pdev->dev, "Card%d, firmware upload "
1532 "failed, not enough memory\n", index + 1);
1533 goto errrelfw;
1534 }
1535 inw(base);
1536 insw(base, data, word_count);
1537 InterruptTheCard(base);
1538
1539 for (a = 0; a < frame->count; a++)
1540 if (data[a] != frame->data[a]) {
1541 kfree(data);
1542 dev_err(&pdev->dev, "Card%d, firmware upload "
1543 "failed\n", index + 1);
1544 goto errrelfw;
1545 }
1546 kfree(data);
1547
1548 udelay(50); /* 0xf */
1549
1550 if (WaitTillCardIsFree(base))
1551 goto errrelfw;
1552
1553 status = inw(base + 0x4);
1554 if (status != 0) {
1555 dev_err(&pdev->dev, "Card%d verify got out of sync. "
1556 "Card Status:0x%x\n", index + 1, status);
1557 goto errrelfw;
1558 }
1559 }
1560
1561 /* xfer ctrl */
1562 if (WaitTillCardIsFree(base))
1563 goto errrelfw;
1564
1565 outw(0xf2, base);
1566 outw(0x800, base);
1567 outw(0x0, base);
1568 outw(0x0, base);
1569 InterruptTheCard(base);
1570 outw(0x0, base + 0x4); /* for ISI4608 cards */
1571
1572 board->status |= FIRMWARE_LOADED;
1573 retval = 0;
1574
1575 errrelfw:
1576 release_firmware(fw);
1577 end:
1578 return retval;
1579 }
1580
1581 /*
1582 * Insmod can set static symbols so keep these static
1583 */
1584 static unsigned int card_count;
1585
1586 static int __devinit isicom_probe(struct pci_dev *pdev,
1587 const struct pci_device_id *ent)
1588 {
1589 unsigned int signature, index;
1590 int retval = -EPERM;
1591 struct isi_board *board = NULL;
1592
1593 if (card_count >= BOARD_COUNT)
1594 goto err;
1595
1596 retval = pci_enable_device(pdev);
1597 if (retval) {
1598 dev_err(&pdev->dev, "failed to enable\n");
1599 goto err;
1600 }
1601
1602 dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1603
1604 /* allot the first empty slot in the array */
1605 for (index = 0; index < BOARD_COUNT; index++)
1606 if (isi_card[index].base == 0) {
1607 board = &isi_card[index];
1608 break;
1609 }
1610
1611 board->index = index;
1612 board->base = pci_resource_start(pdev, 3);
1613 board->irq = pdev->irq;
1614 card_count++;
1615
1616 pci_set_drvdata(pdev, board);
1617
1618 retval = pci_request_region(pdev, 3, ISICOM_NAME);
1619 if (retval) {
1620 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1621 "will be disabled.\n", board->base, board->base + 15,
1622 index + 1);
1623 retval = -EBUSY;
1624 goto errdec;
1625 }
1626
1627 retval = request_irq(board->irq, isicom_interrupt,
1628 IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board);
1629 if (retval < 0) {
1630 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1631 "Card%d will be disabled.\n", board->irq, index + 1);
1632 goto errunrr;
1633 }
1634
1635 retval = reset_card(pdev, index, &signature);
1636 if (retval < 0)
1637 goto errunri;
1638
1639 retval = load_firmware(pdev, index, signature);
1640 if (retval < 0)
1641 goto errunri;
1642
1643 for (index = 0; index < board->port_count; index++)
1644 tty_register_device(isicom_normal, board->index * 16 + index,
1645 &pdev->dev);
1646
1647 return 0;
1648
1649 errunri:
1650 free_irq(board->irq, board);
1651 errunrr:
1652 pci_release_region(pdev, 3);
1653 errdec:
1654 board->base = 0;
1655 card_count--;
1656 pci_disable_device(pdev);
1657 err:
1658 return retval;
1659 }
1660
1661 static void __devexit isicom_remove(struct pci_dev *pdev)
1662 {
1663 struct isi_board *board = pci_get_drvdata(pdev);
1664 unsigned int i;
1665
1666 for (i = 0; i < board->port_count; i++)
1667 tty_unregister_device(isicom_normal, board->index * 16 + i);
1668
1669 free_irq(board->irq, board);
1670 pci_release_region(pdev, 3);
1671 board->base = 0;
1672 card_count--;
1673 pci_disable_device(pdev);
1674 }
1675
1676 static int __init isicom_init(void)
1677 {
1678 int retval, idx, channel;
1679 struct isi_port *port;
1680
1681 for (idx = 0; idx < BOARD_COUNT; idx++) {
1682 port = &isi_ports[idx * 16];
1683 isi_card[idx].ports = port;
1684 spin_lock_init(&isi_card[idx].card_lock);
1685 for (channel = 0; channel < 16; channel++, port++) {
1686 tty_port_init(&port->port);
1687 port->port.ops = &isicom_port_ops;
1688 port->magic = ISICOM_MAGIC;
1689 port->card = &isi_card[idx];
1690 port->channel = channel;
1691 port->port.close_delay = 50 * HZ/100;
1692 port->port.closing_wait = 3000 * HZ/100;
1693 port->status = 0;
1694 /* . . . */
1695 }
1696 isi_card[idx].base = 0;
1697 isi_card[idx].irq = 0;
1698 }
1699
1700 /* tty driver structure initialization */
1701 isicom_normal = alloc_tty_driver(PORT_COUNT);
1702 if (!isicom_normal) {
1703 retval = -ENOMEM;
1704 goto error;
1705 }
1706
1707 isicom_normal->owner = THIS_MODULE;
1708 isicom_normal->name = "ttyM";
1709 isicom_normal->major = ISICOM_NMAJOR;
1710 isicom_normal->minor_start = 0;
1711 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1712 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1713 isicom_normal->init_termios = tty_std_termios;
1714 isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
1715 CLOCAL;
1716 isicom_normal->flags = TTY_DRIVER_REAL_RAW |
1717 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
1718 tty_set_operations(isicom_normal, &isicom_ops);
1719
1720 retval = tty_register_driver(isicom_normal);
1721 if (retval) {
1722 pr_dbg("Couldn't register the dialin driver\n");
1723 goto err_puttty;
1724 }
1725
1726 retval = pci_register_driver(&isicom_driver);
1727 if (retval < 0) {
1728 printk(KERN_ERR "ISICOM: Unable to register pci driver.\n");
1729 goto err_unrtty;
1730 }
1731
1732 mod_timer(&tx, jiffies + 1);
1733
1734 return 0;
1735 err_unrtty:
1736 tty_unregister_driver(isicom_normal);
1737 err_puttty:
1738 put_tty_driver(isicom_normal);
1739 error:
1740 return retval;
1741 }
1742
1743 static void __exit isicom_exit(void)
1744 {
1745 del_timer_sync(&tx);
1746
1747 pci_unregister_driver(&isicom_driver);
1748 tty_unregister_driver(isicom_normal);
1749 put_tty_driver(isicom_normal);
1750 }
1751
1752 module_init(isicom_init);
1753 module_exit(isicom_exit);
1754
1755 MODULE_AUTHOR("MultiTech");
1756 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1757 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards