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omap: i2c: add a timeout to the busy waiting
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / char / isicom.c
blobc1ab303455cf5b673d5684b6db72e453fd3e774f
1 /*
2 * This program is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU General Public License
4 * as published by the Free Software Foundation; either version
5 * 2 of the License, or (at your option) any later version.
6 *
7 * Original driver code supplied by Multi-Tech
8 *
9 * Changes
10 * 1/9/98 alan@lxorguk.ukuu.org.uk
11 * Merge to 2.0.x kernel tree
12 * Obtain and use official major/minors
13 * Loader switched to a misc device
14 * (fixed range check bug as a side effect)
15 * Printk clean up
16 * 9/12/98 alan@lxorguk.ukuu.org.uk
17 * Rough port to 2.1.x
18 *
19 * 10/6/99 sameer Merged the ISA and PCI drivers to
20 * a new unified driver.
21 *
22 * 3/9/99 sameer Added support for ISI4616 cards.
23 *
24 * 16/9/99 sameer We do not force RTS low anymore.
25 * This is to prevent the firmware
26 * from getting confused.
27 *
28 * 26/10/99 sameer Cosmetic changes:The driver now
29 * dumps the Port Count information
30 * along with I/O address and IRQ.
31 *
32 * 13/12/99 sameer Fixed the problem with IRQ sharing.
33 *
34 * 10/5/00 sameer Fixed isicom_shutdown_board()
35 * to not lower DTR on all the ports
36 * when the last port on the card is
37 * closed.
38 *
39 * 10/5/00 sameer Signal mask setup command added
40 * to isicom_setup_port and
41 * isicom_shutdown_port.
42 *
43 * 24/5/00 sameer The driver is now SMP aware.
44 *
45 *
46 * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem
47 *
48 *
49 * 03/01/01 anil .s Added support for resetting the
50 * internal modems on ISI cards.
51 *
52 * 08/02/01 anil .s Upgraded the driver for kernel
53 * 2.4.x
54 *
55 * 11/04/01 Kevin Fixed firmware load problem with
56 * ISIHP-4X card
57 *
58 * 30/04/01 anil .s Fixed the remote login through
59 * ISI port problem. Now the link
60 * does not go down before password
61 * prompt.
62 *
63 * 03/05/01 anil .s Fixed the problem with IRQ sharing
64 * among ISI-PCI cards.
65 *
66 * 03/05/01 anil .s Added support to display the version
67 * info during insmod as well as module
68 * listing by lsmod.
69 *
70 * 10/05/01 anil .s Done the modifications to the source
71 * file and Install script so that the
72 * same installation can be used for
73 * 2.2.x and 2.4.x kernel.
74 *
75 * 06/06/01 anil .s Now we drop both dtr and rts during
76 * shutdown_port as well as raise them
77 * during isicom_config_port.
78 *
79 * 09/06/01 acme@conectiva.com.br use capable, not suser, do
80 * restore_flags on failure in
81 * isicom_send_break, verify put_user
82 * result
83 *
84 * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps
85 * Baud index extended to 21
86 *
87 * 20/03/03 ranjeeth Made to work for Linux Advanced server.
88 * Taken care of license warning.
89 *
90 * 10/12/03 Ravindra Made to work for Fedora Core 1 of
91 * Red Hat Distribution
92 *
93 * 06/01/05 Alan Cox Merged the ISI and base kernel strands
94 * into a single 2.6 driver
95 *
96 * ***********************************************************
97 *
98 * To use this driver you also need the support package. You
99 * can find this in RPM format on
100 * ftp://ftp.linux.org.uk/pub/linux/alan
101 *
102 * You can find the original tools for this direct from Multitech
103 * ftp://ftp.multitech.com/ISI-Cards/
104 *
105 * Having installed the cards the module options (/etc/modprobe.conf)
106 *
107 * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4
108 *
109 * Omit those entries for boards you don't have installed.
110 *
111 * TODO
112 * Merge testing
113 * 64-bit verification
114 */
115
116 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
117
118 #include <linux/module.h>
119 #include <linux/firmware.h>
120 #include <linux/kernel.h>
121 #include <linux/tty.h>
122 #include <linux/tty_flip.h>
123 #include <linux/termios.h>
124 #include <linux/fs.h>
125 #include <linux/sched.h>
126 #include <linux/serial.h>
127 #include <linux/smp_lock.h>
128 #include <linux/mm.h>
129 #include <linux/interrupt.h>
130 #include <linux/timer.h>
131 #include <linux/delay.h>
132 #include <linux/ioport.h>
133 #include <linux/slab.h>
134
135 #include <linux/uaccess.h>
136 #include <linux/io.h>
137 #include <asm/system.h>
138
139 #include <linux/pci.h>
140
141 #include <linux/isicom.h>
142
143 #define InterruptTheCard(base) outw(0, (base) + 0xc)
144 #define ClearInterrupt(base) inw((base) + 0x0a)
145
146 #ifdef DEBUG
147 #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
148 #else
149 #define isicom_paranoia_check(a, b, c) 0
150 #endif
151
152 static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
153 static void __devexit isicom_remove(struct pci_dev *);
154
155 static struct pci_device_id isicom_pci_tbl[] = {
156 { PCI_DEVICE(VENDOR_ID, 0x2028) },
157 { PCI_DEVICE(VENDOR_ID, 0x2051) },
158 { PCI_DEVICE(VENDOR_ID, 0x2052) },
159 { PCI_DEVICE(VENDOR_ID, 0x2053) },
160 { PCI_DEVICE(VENDOR_ID, 0x2054) },
161 { PCI_DEVICE(VENDOR_ID, 0x2055) },
162 { PCI_DEVICE(VENDOR_ID, 0x2056) },
163 { PCI_DEVICE(VENDOR_ID, 0x2057) },
164 { PCI_DEVICE(VENDOR_ID, 0x2058) },
165 { 0 }
166 };
167 MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
168
169 static struct pci_driver isicom_driver = {
170 .name = "isicom",
171 .id_table = isicom_pci_tbl,
172 .probe = isicom_probe,
173 .remove = __devexit_p(isicom_remove)
174 };
175
176 static int prev_card = 3; /* start servicing isi_card[0] */
177 static struct tty_driver *isicom_normal;
178
179 static void isicom_tx(unsigned long _data);
180 static void isicom_start(struct tty_struct *tty);
181
182 static DEFINE_TIMER(tx, isicom_tx, 0, 0);
183
184 /* baud index mappings from linux defns to isi */
185
186 static signed char linuxb_to_isib[] = {
187 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
188 };
189
190 struct isi_board {
191 unsigned long base;
192 int irq;
193 unsigned char port_count;
194 unsigned short status;
195 unsigned short port_status; /* each bit for each port */
196 unsigned short shift_count;
197 struct isi_port *ports;
198 signed char count;
199 spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
200 unsigned long flags;
201 unsigned int index;
202 };
203
204 struct isi_port {
205 unsigned short magic;
206 struct tty_port port;
207 u16 channel;
208 u16 status;
209 struct isi_board *card;
210 unsigned char *xmit_buf;
211 int xmit_head;
212 int xmit_tail;
213 int xmit_cnt;
214 };
215
216 static struct isi_board isi_card[BOARD_COUNT];
217 static struct isi_port isi_ports[PORT_COUNT];
218
219 /*
220 * Locking functions for card level locking. We need to own both
221 * the kernel lock for the card and have the card in a position that
222 * it wants to talk.
223 */
224
225 static inline int WaitTillCardIsFree(unsigned long base)
226 {
227 unsigned int count = 0;
228 unsigned int a = in_atomic(); /* do we run under spinlock? */
229
230 while (!(inw(base + 0xe) & 0x1) && count++ < 100)
231 if (a)
232 mdelay(1);
233 else
234 msleep(1);
235
236 return !(inw(base + 0xe) & 0x1);
237 }
238
239 static int lock_card(struct isi_board *card)
240 {
241 unsigned long base = card->base;
242 unsigned int retries, a;
243
244 for (retries = 0; retries < 10; retries++) {
245 spin_lock_irqsave(&card->card_lock, card->flags);
246 for (a = 0; a < 10; a++) {
247 if (inw(base + 0xe) & 0x1)
248 return 1;
249 udelay(10);
250 }
251 spin_unlock_irqrestore(&card->card_lock, card->flags);
252 msleep(10);
253 }
254 pr_warning("Failed to lock Card (0x%lx)\n", card->base);
255
256 return 0; /* Failed to acquire the card! */
257 }
258
259 static void unlock_card(struct isi_board *card)
260 {
261 spin_unlock_irqrestore(&card->card_lock, card->flags);
262 }
263
264 /*
265 * ISI Card specific ops ...
266 */
267
268 /* card->lock HAS to be held */
269 static void raise_dtr(struct isi_port *port)
270 {
271 struct isi_board *card = port->card;
272 unsigned long base = card->base;
273 u16 channel = port->channel;
274
275 if (WaitTillCardIsFree(base))
276 return;
277
278 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
279 outw(0x0504, base);
280 InterruptTheCard(base);
281 port->status |= ISI_DTR;
282 }
283
284 /* card->lock HAS to be held */
285 static inline void drop_dtr(struct isi_port *port)
286 {
287 struct isi_board *card = port->card;
288 unsigned long base = card->base;
289 u16 channel = port->channel;
290
291 if (WaitTillCardIsFree(base))
292 return;
293
294 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
295 outw(0x0404, base);
296 InterruptTheCard(base);
297 port->status &= ~ISI_DTR;
298 }
299
300 /* card->lock HAS to be held */
301 static inline void raise_rts(struct isi_port *port)
302 {
303 struct isi_board *card = port->card;
304 unsigned long base = card->base;
305 u16 channel = port->channel;
306
307 if (WaitTillCardIsFree(base))
308 return;
309
310 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
311 outw(0x0a04, base);
312 InterruptTheCard(base);
313 port->status |= ISI_RTS;
314 }
315
316 /* card->lock HAS to be held */
317 static inline void drop_rts(struct isi_port *port)
318 {
319 struct isi_board *card = port->card;
320 unsigned long base = card->base;
321 u16 channel = port->channel;
322
323 if (WaitTillCardIsFree(base))
324 return;
325
326 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
327 outw(0x0804, base);
328 InterruptTheCard(base);
329 port->status &= ~ISI_RTS;
330 }
331
332 /* card->lock MUST NOT be held */
333
334 static void isicom_dtr_rts(struct tty_port *port, int on)
335 {
336 struct isi_port *ip = container_of(port, struct isi_port, port);
337 struct isi_board *card = ip->card;
338 unsigned long base = card->base;
339 u16 channel = ip->channel;
340
341 if (!lock_card(card))
342 return;
343
344 if (on) {
345 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
346 outw(0x0f04, base);
347 InterruptTheCard(base);
348 ip->status |= (ISI_DTR | ISI_RTS);
349 } else {
350 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
351 outw(0x0C04, base);
352 InterruptTheCard(base);
353 ip->status &= ~(ISI_DTR | ISI_RTS);
354 }
355 unlock_card(card);
356 }
357
358 /* card->lock HAS to be held */
359 static void drop_dtr_rts(struct isi_port *port)
360 {
361 struct isi_board *card = port->card;
362 unsigned long base = card->base;
363 u16 channel = port->channel;
364
365 if (WaitTillCardIsFree(base))
366 return;
367
368 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
369 outw(0x0c04, base);
370 InterruptTheCard(base);
371 port->status &= ~(ISI_RTS | ISI_DTR);
372 }
373
374 /*
375 * ISICOM Driver specific routines ...
376 *
377 */
378
379 static inline int __isicom_paranoia_check(struct isi_port const *port,
380 char *name, const char *routine)
381 {
382 if (!port) {
383 pr_warning("Warning: bad isicom magic for dev %s in %s.\n",
384 name, routine);
385 return 1;
386 }
387 if (port->magic != ISICOM_MAGIC) {
388 pr_warning("Warning: NULL isicom port for dev %s in %s.\n",
389 name, routine);
390 return 1;
391 }
392
393 return 0;
394 }
395
396 /*
397 * Transmitter.
398 *
399 * We shovel data into the card buffers on a regular basis. The card
400 * will do the rest of the work for us.
401 */
402
403 static void isicom_tx(unsigned long _data)
404 {
405 unsigned long flags, base;
406 unsigned int retries;
407 short count = (BOARD_COUNT-1), card;
408 short txcount, wrd, residue, word_count, cnt;
409 struct isi_port *port;
410 struct tty_struct *tty;
411
412 /* find next active board */
413 card = (prev_card + 1) & 0x0003;
414 while (count-- > 0) {
415 if (isi_card[card].status & BOARD_ACTIVE)
416 break;
417 card = (card + 1) & 0x0003;
418 }
419 if (!(isi_card[card].status & BOARD_ACTIVE))
420 goto sched_again;
421
422 prev_card = card;
423
424 count = isi_card[card].port_count;
425 port = isi_card[card].ports;
426 base = isi_card[card].base;
427
428 spin_lock_irqsave(&isi_card[card].card_lock, flags);
429 for (retries = 0; retries < 100; retries++) {
430 if (inw(base + 0xe) & 0x1)
431 break;
432 udelay(2);
433 }
434 if (retries >= 100)
435 goto unlock;
436
437 tty = tty_port_tty_get(&port->port);
438 if (tty == NULL)
439 goto put_unlock;
440
441 for (; count > 0; count--, port++) {
442 /* port not active or tx disabled to force flow control */
443 if (!(port->port.flags & ASYNC_INITIALIZED) ||
444 !(port->status & ISI_TXOK))
445 continue;
446
447 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
448 if (txcount <= 0 || tty->stopped || tty->hw_stopped)
449 continue;
450
451 if (!(inw(base + 0x02) & (1 << port->channel)))
452 continue;
453
454 pr_debug("txing %d bytes, port%d.\n",
455 txcount, port->channel + 1);
456 outw((port->channel << isi_card[card].shift_count) | txcount,
457 base);
458 residue = NO;
459 wrd = 0;
460 while (1) {
461 cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
462 - port->xmit_tail));
463 if (residue == YES) {
464 residue = NO;
465 if (cnt > 0) {
466 wrd |= (port->port.xmit_buf[port->xmit_tail]
467 << 8);
468 port->xmit_tail = (port->xmit_tail + 1)
469 & (SERIAL_XMIT_SIZE - 1);
470 port->xmit_cnt--;
471 txcount--;
472 cnt--;
473 outw(wrd, base);
474 } else {
475 outw(wrd, base);
476 break;
477 }
478 }
479 if (cnt <= 0)
480 break;
481 word_count = cnt >> 1;
482 outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
483 port->xmit_tail = (port->xmit_tail
484 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
485 txcount -= (word_count << 1);
486 port->xmit_cnt -= (word_count << 1);
487 if (cnt & 0x0001) {
488 residue = YES;
489 wrd = port->port.xmit_buf[port->xmit_tail];
490 port->xmit_tail = (port->xmit_tail + 1)
491 & (SERIAL_XMIT_SIZE - 1);
492 port->xmit_cnt--;
493 txcount--;
494 }
495 }
496
497 InterruptTheCard(base);
498 if (port->xmit_cnt <= 0)
499 port->status &= ~ISI_TXOK;
500 if (port->xmit_cnt <= WAKEUP_CHARS)
501 tty_wakeup(tty);
502 }
503
504 put_unlock:
505 tty_kref_put(tty);
506 unlock:
507 spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
508 /* schedule another tx for hopefully in about 10ms */
509 sched_again:
510 mod_timer(&tx, jiffies + msecs_to_jiffies(10));
511 }
512
513 /*
514 * Main interrupt handler routine
515 */
516
517 static irqreturn_t isicom_interrupt(int irq, void *dev_id)
518 {
519 struct isi_board *card = dev_id;
520 struct isi_port *port;
521 struct tty_struct *tty;
522 unsigned long base;
523 u16 header, word_count, count, channel;
524 short byte_count;
525 unsigned char *rp;
526
527 if (!card || !(card->status & FIRMWARE_LOADED))
528 return IRQ_NONE;
529
530 base = card->base;
531
532 /* did the card interrupt us? */
533 if (!(inw(base + 0x0e) & 0x02))
534 return IRQ_NONE;
535
536 spin_lock(&card->card_lock);
537
538 /*
539 * disable any interrupts from the PCI card and lower the
540 * interrupt line
541 */
542 outw(0x8000, base+0x04);
543 ClearInterrupt(base);
544
545 inw(base); /* get the dummy word out */
546 header = inw(base);
547 channel = (header & 0x7800) >> card->shift_count;
548 byte_count = header & 0xff;
549
550 if (channel + 1 > card->port_count) {
551 pr_warning("%s(0x%lx): %d(channel) > port_count.\n",
552 __func__, base, channel+1);
553 outw(0x0000, base+0x04); /* enable interrupts */
554 spin_unlock(&card->card_lock);
555 return IRQ_HANDLED;
556 }
557 port = card->ports + channel;
558 if (!(port->port.flags & ASYNC_INITIALIZED)) {
559 outw(0x0000, base+0x04); /* enable interrupts */
560 spin_unlock(&card->card_lock);
561 return IRQ_HANDLED;
562 }
563
564 tty = tty_port_tty_get(&port->port);
565 if (tty == NULL) {
566 word_count = byte_count >> 1;
567 while (byte_count > 1) {
568 inw(base);
569 byte_count -= 2;
570 }
571 if (byte_count & 0x01)
572 inw(base);
573 outw(0x0000, base+0x04); /* enable interrupts */
574 spin_unlock(&card->card_lock);
575 return IRQ_HANDLED;
576 }
577
578 if (header & 0x8000) { /* Status Packet */
579 header = inw(base);
580 switch (header & 0xff) {
581 case 0: /* Change in EIA signals */
582 if (port->port.flags & ASYNC_CHECK_CD) {
583 if (port->status & ISI_DCD) {
584 if (!(header & ISI_DCD)) {
585 /* Carrier has been lost */
586 pr_debug("%s: DCD->low.\n",
587 __func__);
588 port->status &= ~ISI_DCD;
589 tty_hangup(tty);
590 }
591 } else if (header & ISI_DCD) {
592 /* Carrier has been detected */
593 pr_debug("%s: DCD->high.\n",
594 __func__);
595 port->status |= ISI_DCD;
596 wake_up_interruptible(&port->port.open_wait);
597 }
598 } else {
599 if (header & ISI_DCD)
600 port->status |= ISI_DCD;
601 else
602 port->status &= ~ISI_DCD;
603 }
604
605 if (port->port.flags & ASYNC_CTS_FLOW) {
606 if (tty->hw_stopped) {
607 if (header & ISI_CTS) {
608 port->port.tty->hw_stopped = 0;
609 /* start tx ing */
610 port->status |= (ISI_TXOK
611 | ISI_CTS);
612 tty_wakeup(tty);
613 }
614 } else if (!(header & ISI_CTS)) {
615 tty->hw_stopped = 1;
616 /* stop tx ing */
617 port->status &= ~(ISI_TXOK | ISI_CTS);
618 }
619 } else {
620 if (header & ISI_CTS)
621 port->status |= ISI_CTS;
622 else
623 port->status &= ~ISI_CTS;
624 }
625
626 if (header & ISI_DSR)
627 port->status |= ISI_DSR;
628 else
629 port->status &= ~ISI_DSR;
630
631 if (header & ISI_RI)
632 port->status |= ISI_RI;
633 else
634 port->status &= ~ISI_RI;
635
636 break;
637
638 case 1: /* Received Break !!! */
639 tty_insert_flip_char(tty, 0, TTY_BREAK);
640 if (port->port.flags & ASYNC_SAK)
641 do_SAK(tty);
642 tty_flip_buffer_push(tty);
643 break;
644
645 case 2: /* Statistics */
646 pr_debug("%s: stats!!!\n", __func__);
647 break;
648
649 default:
650 pr_debug("%s: Unknown code in status packet.\n",
651 __func__);
652 break;
653 }
654 } else { /* Data Packet */
655
656 count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
657 pr_debug("%s: Can rx %d of %d bytes.\n",
658 __func__, count, byte_count);
659 word_count = count >> 1;
660 insw(base, rp, word_count);
661 byte_count -= (word_count << 1);
662 if (count & 0x0001) {
663 tty_insert_flip_char(tty, inw(base) & 0xff,
664 TTY_NORMAL);
665 byte_count -= 2;
666 }
667 if (byte_count > 0) {
668 pr_debug("%s(0x%lx:%d): Flip buffer overflow! dropping bytes...\n",
669 __func__, base, channel + 1);
670 /* drain out unread xtra data */
671 while (byte_count > 0) {
672 inw(base);
673 byte_count -= 2;
674 }
675 }
676 tty_flip_buffer_push(tty);
677 }
678 outw(0x0000, base+0x04); /* enable interrupts */
679 spin_unlock(&card->card_lock);
680 tty_kref_put(tty);
681
682 return IRQ_HANDLED;
683 }
684
685 static void isicom_config_port(struct tty_struct *tty)
686 {
687 struct isi_port *port = tty->driver_data;
688 struct isi_board *card = port->card;
689 unsigned long baud;
690 unsigned long base = card->base;
691 u16 channel_setup, channel = port->channel,
692 shift_count = card->shift_count;
693 unsigned char flow_ctrl;
694
695 /* FIXME: Switch to new tty baud API */
696 baud = C_BAUD(tty);
697 if (baud & CBAUDEX) {
698 baud &= ~CBAUDEX;
699
700 /* if CBAUDEX bit is on and the baud is set to either 50 or 75
701 * then the card is programmed for 57.6Kbps or 115Kbps
702 * respectively.
703 */
704
705 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
706 if (baud < 1 || baud > 4)
707 tty->termios->c_cflag &= ~CBAUDEX;
708 else
709 baud += 15;
710 }
711 if (baud == 15) {
712
713 /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
714 * by the set_serial_info ioctl ... this is done by
715 * the 'setserial' utility.
716 */
717
718 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
719 baud++; /* 57.6 Kbps */
720 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
721 baud += 2; /* 115 Kbps */
722 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
723 baud += 3; /* 230 kbps*/
724 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
725 baud += 4; /* 460 kbps*/
726 }
727 if (linuxb_to_isib[baud] == -1) {
728 /* hang up */
729 drop_dtr(port);
730 return;
731 } else
732 raise_dtr(port);
733
734 if (WaitTillCardIsFree(base) == 0) {
735 outw(0x8000 | (channel << shift_count) | 0x03, base);
736 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
737 channel_setup = 0;
738 switch (C_CSIZE(tty)) {
739 case CS5:
740 channel_setup |= ISICOM_CS5;
741 break;
742 case CS6:
743 channel_setup |= ISICOM_CS6;
744 break;
745 case CS7:
746 channel_setup |= ISICOM_CS7;
747 break;
748 case CS8:
749 channel_setup |= ISICOM_CS8;
750 break;
751 }
752
753 if (C_CSTOPB(tty))
754 channel_setup |= ISICOM_2SB;
755 if (C_PARENB(tty)) {
756 channel_setup |= ISICOM_EVPAR;
757 if (C_PARODD(tty))
758 channel_setup |= ISICOM_ODPAR;
759 }
760 outw(channel_setup, base);
761 InterruptTheCard(base);
762 }
763 if (C_CLOCAL(tty))
764 port->port.flags &= ~ASYNC_CHECK_CD;
765 else
766 port->port.flags |= ASYNC_CHECK_CD;
767
768 /* flow control settings ...*/
769 flow_ctrl = 0;
770 port->port.flags &= ~ASYNC_CTS_FLOW;
771 if (C_CRTSCTS(tty)) {
772 port->port.flags |= ASYNC_CTS_FLOW;
773 flow_ctrl |= ISICOM_CTSRTS;
774 }
775 if (I_IXON(tty))
776 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
777 if (I_IXOFF(tty))
778 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
779
780 if (WaitTillCardIsFree(base) == 0) {
781 outw(0x8000 | (channel << shift_count) | 0x04, base);
782 outw(flow_ctrl << 8 | 0x05, base);
783 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
784 InterruptTheCard(base);
785 }
786
787 /* rx enabled -> enable port for rx on the card */
788 if (C_CREAD(tty)) {
789 card->port_status |= (1 << channel);
790 outw(card->port_status, base + 0x02);
791 }
792 }
793
794 /* open et all */
795
796 static inline void isicom_setup_board(struct isi_board *bp)
797 {
798 int channel;
799 struct isi_port *port;
800
801 bp->count++;
802 if (!(bp->status & BOARD_INIT)) {
803 port = bp->ports;
804 for (channel = 0; channel < bp->port_count; channel++, port++)
805 drop_dtr_rts(port);
806 }
807 bp->status |= BOARD_ACTIVE | BOARD_INIT;
808 }
809
810 /* Activate and thus setup board are protected from races against shutdown
811 by the tty_port mutex */
812
813 static int isicom_activate(struct tty_port *tport, struct tty_struct *tty)
814 {
815 struct isi_port *port = container_of(tport, struct isi_port, port);
816 struct isi_board *card = port->card;
817 unsigned long flags;
818
819 if (tty_port_alloc_xmit_buf(tport) < 0)
820 return -ENOMEM;
821
822 spin_lock_irqsave(&card->card_lock, flags);
823 isicom_setup_board(card);
824
825 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
826
827 /* discard any residual data */
828 if (WaitTillCardIsFree(card->base) == 0) {
829 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
830 card->base);
831 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
832 InterruptTheCard(card->base);
833 }
834 isicom_config_port(tty);
835 spin_unlock_irqrestore(&card->card_lock, flags);
836
837 return 0;
838 }
839
840 static int isicom_carrier_raised(struct tty_port *port)
841 {
842 struct isi_port *ip = container_of(port, struct isi_port, port);
843 return (ip->status & ISI_DCD)?1 : 0;
844 }
845
846 static struct tty_port *isicom_find_port(struct tty_struct *tty)
847 {
848 struct isi_port *port;
849 struct isi_board *card;
850 unsigned int board;
851 int line = tty->index;
852
853 if (line < 0 || line > PORT_COUNT-1)
854 return NULL;
855 board = BOARD(line);
856 card = &isi_card[board];
857
858 if (!(card->status & FIRMWARE_LOADED))
859 return NULL;
860
861 /* open on a port greater than the port count for the card !!! */
862 if (line > ((board * 16) + card->port_count - 1))
863 return NULL;
864
865 port = &isi_ports[line];
866 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
867 return NULL;
868
869 return &port->port;
870 }
871
872 static int isicom_open(struct tty_struct *tty, struct file *filp)
873 {
874 struct isi_port *port;
875 struct isi_board *card;
876 struct tty_port *tport;
877
878 tport = isicom_find_port(tty);
879 if (tport == NULL)
880 return -ENODEV;
881 port = container_of(tport, struct isi_port, port);
882
883 tty->driver_data = port;
884 return tty_port_open(tport, tty, filp);
885 }
886
887 /* close et all */
888
889 /* card->lock HAS to be held */
890 static void isicom_shutdown_port(struct isi_port *port)
891 {
892 struct isi_board *card = port->card;
893
894 if (--card->count < 0) {
895 pr_debug("%s: bad board(0x%lx) count %d.\n",
896 __func__, card->base, card->count);
897 card->count = 0;
898 }
899 /* last port was closed, shutdown that board too */
900 if (!card->count)
901 card->status &= BOARD_ACTIVE;
902 }
903
904 static void isicom_flush_buffer(struct tty_struct *tty)
905 {
906 struct isi_port *port = tty->driver_data;
907 struct isi_board *card = port->card;
908 unsigned long flags;
909
910 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
911 return;
912
913 spin_lock_irqsave(&card->card_lock, flags);
914 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
915 spin_unlock_irqrestore(&card->card_lock, flags);
916
917 tty_wakeup(tty);
918 }
919
920 static void isicom_shutdown(struct tty_port *port)
921 {
922 struct isi_port *ip = container_of(port, struct isi_port, port);
923 struct isi_board *card = ip->card;
924 unsigned long flags;
925
926 /* indicate to the card that no more data can be received
927 on this port */
928 spin_lock_irqsave(&card->card_lock, flags);
929 card->port_status &= ~(1 << ip->channel);
930 outw(card->port_status, card->base + 0x02);
931 isicom_shutdown_port(ip);
932 spin_unlock_irqrestore(&card->card_lock, flags);
933 tty_port_free_xmit_buf(port);
934 }
935
936 static void isicom_close(struct tty_struct *tty, struct file *filp)
937 {
938 struct isi_port *ip = tty->driver_data;
939 struct tty_port *port;
940
941 if (ip == NULL)
942 return;
943
944 port = &ip->port;
945 if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
946 return;
947 tty_port_close(port, tty, filp);
948 }
949
950 /* write et all */
951 static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
952 int count)
953 {
954 struct isi_port *port = tty->driver_data;
955 struct isi_board *card = port->card;
956 unsigned long flags;
957 int cnt, total = 0;
958
959 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
960 return 0;
961
962 spin_lock_irqsave(&card->card_lock, flags);
963
964 while (1) {
965 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
966 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
967 if (cnt <= 0)
968 break;
969
970 memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
971 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
972 - 1);
973 port->xmit_cnt += cnt;
974 buf += cnt;
975 count -= cnt;
976 total += cnt;
977 }
978 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
979 port->status |= ISI_TXOK;
980 spin_unlock_irqrestore(&card->card_lock, flags);
981 return total;
982 }
983
984 /* put_char et all */
985 static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
986 {
987 struct isi_port *port = tty->driver_data;
988 struct isi_board *card = port->card;
989 unsigned long flags;
990
991 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
992 return 0;
993
994 spin_lock_irqsave(&card->card_lock, flags);
995 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
996 spin_unlock_irqrestore(&card->card_lock, flags);
997 return 0;
998 }
999
1000 port->port.xmit_buf[port->xmit_head++] = ch;
1001 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
1002 port->xmit_cnt++;
1003 spin_unlock_irqrestore(&card->card_lock, flags);
1004 return 1;
1005 }
1006
1007 /* flush_chars et all */
1008 static void isicom_flush_chars(struct tty_struct *tty)
1009 {
1010 struct isi_port *port = tty->driver_data;
1011
1012 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1013 return;
1014
1015 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1016 !port->port.xmit_buf)
1017 return;
1018
1019 /* this tells the transmitter to consider this port for
1020 data output to the card ... that's the best we can do. */
1021 port->status |= ISI_TXOK;
1022 }
1023
1024 /* write_room et all */
1025 static int isicom_write_room(struct tty_struct *tty)
1026 {
1027 struct isi_port *port = tty->driver_data;
1028 int free;
1029
1030 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1031 return 0;
1032
1033 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1034 if (free < 0)
1035 free = 0;
1036 return free;
1037 }
1038
1039 /* chars_in_buffer et all */
1040 static int isicom_chars_in_buffer(struct tty_struct *tty)
1041 {
1042 struct isi_port *port = tty->driver_data;
1043 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1044 return 0;
1045 return port->xmit_cnt;
1046 }
1047
1048 /* ioctl et all */
1049 static int isicom_send_break(struct tty_struct *tty, int length)
1050 {
1051 struct isi_port *port = tty->driver_data;
1052 struct isi_board *card = port->card;
1053 unsigned long base = card->base;
1054
1055 if (length == -1)
1056 return -EOPNOTSUPP;
1057
1058 if (!lock_card(card))
1059 return -EINVAL;
1060
1061 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1062 outw((length & 0xff) << 8 | 0x00, base);
1063 outw((length & 0xff00), base);
1064 InterruptTheCard(base);
1065
1066 unlock_card(card);
1067 return 0;
1068 }
1069
1070 static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
1071 {
1072 struct isi_port *port = tty->driver_data;
1073 /* just send the port status */
1074 u16 status = port->status;
1075
1076 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1077 return -ENODEV;
1078
1079 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1080 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1081 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1082 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1083 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1084 ((status & ISI_RI ) ? TIOCM_RI : 0);
1085 }
1086
1087 static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
1088 unsigned int set, unsigned int clear)
1089 {
1090 struct isi_port *port = tty->driver_data;
1091 unsigned long flags;
1092
1093 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1094 return -ENODEV;
1095
1096 spin_lock_irqsave(&port->card->card_lock, flags);
1097 if (set & TIOCM_RTS)
1098 raise_rts(port);
1099 if (set & TIOCM_DTR)
1100 raise_dtr(port);
1101
1102 if (clear & TIOCM_RTS)
1103 drop_rts(port);
1104 if (clear & TIOCM_DTR)
1105 drop_dtr(port);
1106 spin_unlock_irqrestore(&port->card->card_lock, flags);
1107
1108 return 0;
1109 }
1110
1111 static int isicom_set_serial_info(struct tty_struct *tty,
1112 struct serial_struct __user *info)
1113 {
1114 struct isi_port *port = tty->driver_data;
1115 struct serial_struct newinfo;
1116 int reconfig_port;
1117
1118 if (copy_from_user(&newinfo, info, sizeof(newinfo)))
1119 return -EFAULT;
1120
1121 lock_kernel();
1122
1123 reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
1124 (newinfo.flags & ASYNC_SPD_MASK));
1125
1126 if (!capable(CAP_SYS_ADMIN)) {
1127 if ((newinfo.close_delay != port->port.close_delay) ||
1128 (newinfo.closing_wait != port->port.closing_wait) ||
1129 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1130 (port->port.flags & ~ASYNC_USR_MASK))) {
1131 unlock_kernel();
1132 return -EPERM;
1133 }
1134 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1135 (newinfo.flags & ASYNC_USR_MASK));
1136 } else {
1137 port->port.close_delay = newinfo.close_delay;
1138 port->port.closing_wait = newinfo.closing_wait;
1139 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1140 (newinfo.flags & ASYNC_FLAGS));
1141 }
1142 if (reconfig_port) {
1143 unsigned long flags;
1144 spin_lock_irqsave(&port->card->card_lock, flags);
1145 isicom_config_port(tty);
1146 spin_unlock_irqrestore(&port->card->card_lock, flags);
1147 }
1148 unlock_kernel();
1149 return 0;
1150 }
1151
1152 static int isicom_get_serial_info(struct isi_port *port,
1153 struct serial_struct __user *info)
1154 {
1155 struct serial_struct out_info;
1156
1157 lock_kernel();
1158 memset(&out_info, 0, sizeof(out_info));
1159 /* out_info.type = ? */
1160 out_info.line = port - isi_ports;
1161 out_info.port = port->card->base;
1162 out_info.irq = port->card->irq;
1163 out_info.flags = port->port.flags;
1164 /* out_info.baud_base = ? */
1165 out_info.close_delay = port->port.close_delay;
1166 out_info.closing_wait = port->port.closing_wait;
1167 unlock_kernel();
1168 if (copy_to_user(info, &out_info, sizeof(out_info)))
1169 return -EFAULT;
1170 return 0;
1171 }
1172
1173 static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
1174 unsigned int cmd, unsigned long arg)
1175 {
1176 struct isi_port *port = tty->driver_data;
1177 void __user *argp = (void __user *)arg;
1178
1179 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1180 return -ENODEV;
1181
1182 switch (cmd) {
1183 case TIOCGSERIAL:
1184 return isicom_get_serial_info(port, argp);
1185
1186 case TIOCSSERIAL:
1187 return isicom_set_serial_info(tty, argp);
1188
1189 default:
1190 return -ENOIOCTLCMD;
1191 }
1192 return 0;
1193 }
1194
1195 /* set_termios et all */
1196 static void isicom_set_termios(struct tty_struct *tty,
1197 struct ktermios *old_termios)
1198 {
1199 struct isi_port *port = tty->driver_data;
1200 unsigned long flags;
1201
1202 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1203 return;
1204
1205 if (tty->termios->c_cflag == old_termios->c_cflag &&
1206 tty->termios->c_iflag == old_termios->c_iflag)
1207 return;
1208
1209 spin_lock_irqsave(&port->card->card_lock, flags);
1210 isicom_config_port(tty);
1211 spin_unlock_irqrestore(&port->card->card_lock, flags);
1212
1213 if ((old_termios->c_cflag & CRTSCTS) &&
1214 !(tty->termios->c_cflag & CRTSCTS)) {
1215 tty->hw_stopped = 0;
1216 isicom_start(tty);
1217 }
1218 }
1219
1220 /* throttle et all */
1221 static void isicom_throttle(struct tty_struct *tty)
1222 {
1223 struct isi_port *port = tty->driver_data;
1224 struct isi_board *card = port->card;
1225
1226 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1227 return;
1228
1229 /* tell the card that this port cannot handle any more data for now */
1230 card->port_status &= ~(1 << port->channel);
1231 outw(card->port_status, card->base + 0x02);
1232 }
1233
1234 /* unthrottle et all */
1235 static void isicom_unthrottle(struct tty_struct *tty)
1236 {
1237 struct isi_port *port = tty->driver_data;
1238 struct isi_board *card = port->card;
1239
1240 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1241 return;
1242
1243 /* tell the card that this port is ready to accept more data */
1244 card->port_status |= (1 << port->channel);
1245 outw(card->port_status, card->base + 0x02);
1246 }
1247
1248 /* stop et all */
1249 static void isicom_stop(struct tty_struct *tty)
1250 {
1251 struct isi_port *port = tty->driver_data;
1252
1253 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1254 return;
1255
1256 /* this tells the transmitter not to consider this port for
1257 data output to the card. */
1258 port->status &= ~ISI_TXOK;
1259 }
1260
1261 /* start et all */
1262 static void isicom_start(struct tty_struct *tty)
1263 {
1264 struct isi_port *port = tty->driver_data;
1265
1266 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1267 return;
1268
1269 /* this tells the transmitter to consider this port for
1270 data output to the card. */
1271 port->status |= ISI_TXOK;
1272 }
1273
1274 static void isicom_hangup(struct tty_struct *tty)
1275 {
1276 struct isi_port *port = tty->driver_data;
1277
1278 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1279 return;
1280 tty_port_hangup(&port->port);
1281 }
1282
1283
1284 /*
1285 * Driver init and deinit functions
1286 */
1287
1288 static const struct tty_operations isicom_ops = {
1289 .open = isicom_open,
1290 .close = isicom_close,
1291 .write = isicom_write,
1292 .put_char = isicom_put_char,
1293 .flush_chars = isicom_flush_chars,
1294 .write_room = isicom_write_room,
1295 .chars_in_buffer = isicom_chars_in_buffer,
1296 .ioctl = isicom_ioctl,
1297 .set_termios = isicom_set_termios,
1298 .throttle = isicom_throttle,
1299 .unthrottle = isicom_unthrottle,
1300 .stop = isicom_stop,
1301 .start = isicom_start,
1302 .hangup = isicom_hangup,
1303 .flush_buffer = isicom_flush_buffer,
1304 .tiocmget = isicom_tiocmget,
1305 .tiocmset = isicom_tiocmset,
1306 .break_ctl = isicom_send_break,
1307 };
1308
1309 static const struct tty_port_operations isicom_port_ops = {
1310 .carrier_raised = isicom_carrier_raised,
1311 .dtr_rts = isicom_dtr_rts,
1312 .activate = isicom_activate,
1313 .shutdown = isicom_shutdown,
1314 };
1315
1316 static int __devinit reset_card(struct pci_dev *pdev,
1317 const unsigned int card, unsigned int *signature)
1318 {
1319 struct isi_board *board = pci_get_drvdata(pdev);
1320 unsigned long base = board->base;
1321 unsigned int sig, portcount = 0;
1322 int retval = 0;
1323
1324 dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1325 base);
1326
1327 inw(base + 0x8);
1328
1329 msleep(10);
1330
1331 outw(0, base + 0x8); /* Reset */
1332
1333 msleep(1000);
1334
1335 sig = inw(base + 0x4) & 0xff;
1336
1337 if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1338 sig != 0xee) {
1339 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1340 "bad I/O Port Address 0x%lx).\n", card + 1, base);
1341 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1342 retval = -EIO;
1343 goto end;
1344 }
1345
1346 msleep(10);
1347
1348 portcount = inw(base + 0x2);
1349 if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1350 portcount != 8 && portcount != 16)) {
1351 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1352 card + 1);
1353 retval = -EIO;
1354 goto end;
1355 }
1356
1357 switch (sig) {
1358 case 0xa5:
1359 case 0xbb:
1360 case 0xdd:
1361 board->port_count = (portcount == 4) ? 4 : 8;
1362 board->shift_count = 12;
1363 break;
1364 case 0xcc:
1365 case 0xee:
1366 board->port_count = 16;
1367 board->shift_count = 11;
1368 break;
1369 }
1370 dev_info(&pdev->dev, "-Done\n");
1371 *signature = sig;
1372
1373 end:
1374 return retval;
1375 }
1376
1377 static int __devinit load_firmware(struct pci_dev *pdev,
1378 const unsigned int index, const unsigned int signature)
1379 {
1380 struct isi_board *board = pci_get_drvdata(pdev);
1381 const struct firmware *fw;
1382 unsigned long base = board->base;
1383 unsigned int a;
1384 u16 word_count, status;
1385 int retval = -EIO;
1386 char *name;
1387 u8 *data;
1388
1389 struct stframe {
1390 u16 addr;
1391 u16 count;
1392 u8 data[0];
1393 } *frame;
1394
1395 switch (signature) {
1396 case 0xa5:
1397 name = "isi608.bin";
1398 break;
1399 case 0xbb:
1400 name = "isi608em.bin";
1401 break;
1402 case 0xcc:
1403 name = "isi616em.bin";
1404 break;
1405 case 0xdd:
1406 name = "isi4608.bin";
1407 break;
1408 case 0xee:
1409 name = "isi4616.bin";
1410 break;
1411 default:
1412 dev_err(&pdev->dev, "Unknown signature.\n");
1413 goto end;
1414 }
1415
1416 retval = request_firmware(&fw, name, &pdev->dev);
1417 if (retval)
1418 goto end;
1419
1420 retval = -EIO;
1421
1422 for (frame = (struct stframe *)fw->data;
1423 frame < (struct stframe *)(fw->data + fw->size);
1424 frame = (struct stframe *)((u8 *)(frame + 1) +
1425 frame->count)) {
1426 if (WaitTillCardIsFree(base))
1427 goto errrelfw;
1428
1429 outw(0xf0, base); /* start upload sequence */
1430 outw(0x00, base);
1431 outw(frame->addr, base); /* lsb of address */
1432
1433 word_count = frame->count / 2 + frame->count % 2;
1434 outw(word_count, base);
1435 InterruptTheCard(base);
1436
1437 udelay(100); /* 0x2f */
1438
1439 if (WaitTillCardIsFree(base))
1440 goto errrelfw;
1441
1442 status = inw(base + 0x4);
1443 if (status != 0) {
1444 dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1445 "Address:0x%x\n"
1446 "Count:0x%x\n"
1447 "Status:0x%x\n",
1448 index + 1, frame->addr, frame->count, status);
1449 goto errrelfw;
1450 }
1451 outsw(base, frame->data, word_count);
1452
1453 InterruptTheCard(base);
1454
1455 udelay(50); /* 0x0f */
1456
1457 if (WaitTillCardIsFree(base))
1458 goto errrelfw;
1459
1460 status = inw(base + 0x4);
1461 if (status != 0) {
1462 dev_err(&pdev->dev, "Card%d got out of sync.Card "
1463 "Status:0x%x\n", index + 1, status);
1464 goto errrelfw;
1465 }
1466 }
1467
1468 /* XXX: should we test it by reading it back and comparing with original like
1469 * in load firmware package? */
1470 for (frame = (struct stframe *)fw->data;
1471 frame < (struct stframe *)(fw->data + fw->size);
1472 frame = (struct stframe *)((u8 *)(frame + 1) +
1473 frame->count)) {
1474 if (WaitTillCardIsFree(base))
1475 goto errrelfw;
1476
1477 outw(0xf1, base); /* start download sequence */
1478 outw(0x00, base);
1479 outw(frame->addr, base); /* lsb of address */
1480
1481 word_count = (frame->count >> 1) + frame->count % 2;
1482 outw(word_count + 1, base);
1483 InterruptTheCard(base);
1484
1485 udelay(50); /* 0xf */
1486
1487 if (WaitTillCardIsFree(base))
1488 goto errrelfw;
1489
1490 status = inw(base + 0x4);
1491 if (status != 0) {
1492 dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1493 "Address:0x%x\n"
1494 "Count:0x%x\n"
1495 "Status: 0x%x\n",
1496 index + 1, frame->addr, frame->count, status);
1497 goto errrelfw;
1498 }
1499
1500 data = kmalloc(word_count * 2, GFP_KERNEL);
1501 if (data == NULL) {
1502 dev_err(&pdev->dev, "Card%d, firmware upload "
1503 "failed, not enough memory\n", index + 1);
1504 goto errrelfw;
1505 }
1506 inw(base);
1507 insw(base, data, word_count);
1508 InterruptTheCard(base);
1509
1510 for (a = 0; a < frame->count; a++)
1511 if (data[a] != frame->data[a]) {
1512 kfree(data);
1513 dev_err(&pdev->dev, "Card%d, firmware upload "
1514 "failed\n", index + 1);
1515 goto errrelfw;
1516 }
1517 kfree(data);
1518
1519 udelay(50); /* 0xf */
1520
1521 if (WaitTillCardIsFree(base))
1522 goto errrelfw;
1523
1524 status = inw(base + 0x4);
1525 if (status != 0) {
1526 dev_err(&pdev->dev, "Card%d verify got out of sync. "
1527 "Card Status:0x%x\n", index + 1, status);
1528 goto errrelfw;
1529 }
1530 }
1531
1532 /* xfer ctrl */
1533 if (WaitTillCardIsFree(base))
1534 goto errrelfw;
1535
1536 outw(0xf2, base);
1537 outw(0x800, base);
1538 outw(0x0, base);
1539 outw(0x0, base);
1540 InterruptTheCard(base);
1541 outw(0x0, base + 0x4); /* for ISI4608 cards */
1542
1543 board->status |= FIRMWARE_LOADED;
1544 retval = 0;
1545
1546 errrelfw:
1547 release_firmware(fw);
1548 end:
1549 return retval;
1550 }
1551
1552 /*
1553 * Insmod can set static symbols so keep these static
1554 */
1555 static unsigned int card_count;
1556
1557 static int __devinit isicom_probe(struct pci_dev *pdev,
1558 const struct pci_device_id *ent)
1559 {
1560 unsigned int uninitialized_var(signature), index;
1561 int retval = -EPERM;
1562 struct isi_board *board = NULL;
1563
1564 if (card_count >= BOARD_COUNT)
1565 goto err;
1566
1567 retval = pci_enable_device(pdev);
1568 if (retval) {
1569 dev_err(&pdev->dev, "failed to enable\n");
1570 goto err;
1571 }
1572
1573 dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1574
1575 /* allot the first empty slot in the array */
1576 for (index = 0; index < BOARD_COUNT; index++)
1577 if (isi_card[index].base == 0) {
1578 board = &isi_card[index];
1579 break;
1580 }
1581
1582 board->index = index;
1583 board->base = pci_resource_start(pdev, 3);
1584 board->irq = pdev->irq;
1585 card_count++;
1586
1587 pci_set_drvdata(pdev, board);
1588
1589 retval = pci_request_region(pdev, 3, ISICOM_NAME);
1590 if (retval) {
1591 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1592 "will be disabled.\n", board->base, board->base + 15,
1593 index + 1);
1594 retval = -EBUSY;
1595 goto errdec;
1596 }
1597
1598 retval = request_irq(board->irq, isicom_interrupt,
1599 IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board);
1600 if (retval < 0) {
1601 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1602 "Card%d will be disabled.\n", board->irq, index + 1);
1603 goto errunrr;
1604 }
1605
1606 retval = reset_card(pdev, index, &signature);
1607 if (retval < 0)
1608 goto errunri;
1609
1610 retval = load_firmware(pdev, index, signature);
1611 if (retval < 0)
1612 goto errunri;
1613
1614 for (index = 0; index < board->port_count; index++)
1615 tty_register_device(isicom_normal, board->index * 16 + index,
1616 &pdev->dev);
1617
1618 return 0;
1619
1620 errunri:
1621 free_irq(board->irq, board);
1622 errunrr:
1623 pci_release_region(pdev, 3);
1624 errdec:
1625 board->base = 0;
1626 card_count--;
1627 pci_disable_device(pdev);
1628 err:
1629 return retval;
1630 }
1631
1632 static void __devexit isicom_remove(struct pci_dev *pdev)
1633 {
1634 struct isi_board *board = pci_get_drvdata(pdev);
1635 unsigned int i;
1636
1637 for (i = 0; i < board->port_count; i++)
1638 tty_unregister_device(isicom_normal, board->index * 16 + i);
1639
1640 free_irq(board->irq, board);
1641 pci_release_region(pdev, 3);
1642 board->base = 0;
1643 card_count--;
1644 pci_disable_device(pdev);
1645 }
1646
1647 static int __init isicom_init(void)
1648 {
1649 int retval, idx, channel;
1650 struct isi_port *port;
1651
1652 for (idx = 0; idx < BOARD_COUNT; idx++) {
1653 port = &isi_ports[idx * 16];
1654 isi_card[idx].ports = port;
1655 spin_lock_init(&isi_card[idx].card_lock);
1656 for (channel = 0; channel < 16; channel++, port++) {
1657 tty_port_init(&port->port);
1658 port->port.ops = &isicom_port_ops;
1659 port->magic = ISICOM_MAGIC;
1660 port->card = &isi_card[idx];
1661 port->channel = channel;
1662 port->port.close_delay = 50 * HZ/100;
1663 port->port.closing_wait = 3000 * HZ/100;
1664 port->status = 0;
1665 /* . . . */
1666 }
1667 isi_card[idx].base = 0;
1668 isi_card[idx].irq = 0;
1669 }
1670
1671 /* tty driver structure initialization */
1672 isicom_normal = alloc_tty_driver(PORT_COUNT);
1673 if (!isicom_normal) {
1674 retval = -ENOMEM;
1675 goto error;
1676 }
1677
1678 isicom_normal->owner = THIS_MODULE;
1679 isicom_normal->name = "ttyM";
1680 isicom_normal->major = ISICOM_NMAJOR;
1681 isicom_normal->minor_start = 0;
1682 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1683 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1684 isicom_normal->init_termios = tty_std_termios;
1685 isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
1686 CLOCAL;
1687 isicom_normal->flags = TTY_DRIVER_REAL_RAW |
1688 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
1689 tty_set_operations(isicom_normal, &isicom_ops);
1690
1691 retval = tty_register_driver(isicom_normal);
1692 if (retval) {
1693 pr_debug("Couldn't register the dialin driver\n");
1694 goto err_puttty;
1695 }
1696
1697 retval = pci_register_driver(&isicom_driver);
1698 if (retval < 0) {
1699 pr_err("Unable to register pci driver.\n");
1700 goto err_unrtty;
1701 }
1702
1703 mod_timer(&tx, jiffies + 1);
1704
1705 return 0;
1706 err_unrtty:
1707 tty_unregister_driver(isicom_normal);
1708 err_puttty:
1709 put_tty_driver(isicom_normal);
1710 error:
1711 return retval;
1712 }
1713
1714 static void __exit isicom_exit(void)
1715 {
1716 del_timer_sync(&tx);
1717
1718 pci_unregister_driver(&isicom_driver);
1719 tty_unregister_driver(isicom_normal);
1720 put_tty_driver(isicom_normal);
1721 }
1722
1723 module_init(isicom_init);
1724 module_exit(isicom_exit);
1725
1726 MODULE_AUTHOR("MultiTech");
1727 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1728 MODULE_LICENSE("GPL");
1729 MODULE_FIRMWARE("isi608.bin");
1730 MODULE_FIRMWARE("isi608em.bin");
1731 MODULE_FIRMWARE("isi616em.bin");
1732 MODULE_FIRMWARE("isi4608.bin");
1733 MODULE_FIRMWARE("isi4616.bin");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree