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platform: x86: asus_acpi: world-writable procfs files
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / char / isicom.c
blob300d5bd6cd0602fc57f160d00757d64fb49e2e6a
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/smp_lock.h>
126 #include <linux/mm.h>
127 #include <linux/interrupt.h>
128 #include <linux/timer.h>
129 #include <linux/delay.h>
130 #include <linux/ioport.h>
131
132 #include <linux/uaccess.h>
133 #include <linux/io.h>
134 #include <asm/system.h>
135
136 #include <linux/pci.h>
137
138 #include <linux/isicom.h>
139
140 #define InterruptTheCard(base) outw(0, (base) + 0xc)
141 #define ClearInterrupt(base) inw((base) + 0x0a)
142
143 #define pr_dbg(str...) pr_debug("ISICOM: " str)
144 #ifdef DEBUG
145 #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
146 #else
147 #define isicom_paranoia_check(a, b, c) 0
148 #endif
149
150 static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
151 static void __devexit isicom_remove(struct pci_dev *);
152
153 static struct pci_device_id isicom_pci_tbl[] = {
154 { PCI_DEVICE(VENDOR_ID, 0x2028) },
155 { PCI_DEVICE(VENDOR_ID, 0x2051) },
156 { PCI_DEVICE(VENDOR_ID, 0x2052) },
157 { PCI_DEVICE(VENDOR_ID, 0x2053) },
158 { PCI_DEVICE(VENDOR_ID, 0x2054) },
159 { PCI_DEVICE(VENDOR_ID, 0x2055) },
160 { PCI_DEVICE(VENDOR_ID, 0x2056) },
161 { PCI_DEVICE(VENDOR_ID, 0x2057) },
162 { PCI_DEVICE(VENDOR_ID, 0x2058) },
163 { 0 }
164 };
165 MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
166
167 static struct pci_driver isicom_driver = {
168 .name = "isicom",
169 .id_table = isicom_pci_tbl,
170 .probe = isicom_probe,
171 .remove = __devexit_p(isicom_remove)
172 };
173
174 static int prev_card = 3; /* start servicing isi_card[0] */
175 static struct tty_driver *isicom_normal;
176
177 static void isicom_tx(unsigned long _data);
178 static void isicom_start(struct tty_struct *tty);
179
180 static DEFINE_TIMER(tx, isicom_tx, 0, 0);
181
182 /* baud index mappings from linux defns to isi */
183
184 static signed char linuxb_to_isib[] = {
185 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
186 };
187
188 struct isi_board {
189 unsigned long base;
190 int irq;
191 unsigned char port_count;
192 unsigned short status;
193 unsigned short port_status; /* each bit for each port */
194 unsigned short shift_count;
195 struct isi_port *ports;
196 signed char count;
197 spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
198 unsigned long flags;
199 unsigned int index;
200 };
201
202 struct isi_port {
203 unsigned short magic;
204 struct tty_port port;
205 u16 channel;
206 u16 status;
207 struct isi_board *card;
208 unsigned char *xmit_buf;
209 int xmit_head;
210 int xmit_tail;
211 int xmit_cnt;
212 };
213
214 static struct isi_board isi_card[BOARD_COUNT];
215 static struct isi_port isi_ports[PORT_COUNT];
216
217 /*
218 * Locking functions for card level locking. We need to own both
219 * the kernel lock for the card and have the card in a position that
220 * it wants to talk.
221 */
222
223 static inline int WaitTillCardIsFree(unsigned long base)
224 {
225 unsigned int count = 0;
226 unsigned int a = in_atomic(); /* do we run under spinlock? */
227
228 while (!(inw(base + 0xe) & 0x1) && count++ < 100)
229 if (a)
230 mdelay(1);
231 else
232 msleep(1);
233
234 return !(inw(base + 0xe) & 0x1);
235 }
236
237 static int lock_card(struct isi_board *card)
238 {
239 unsigned long base = card->base;
240 unsigned int retries, a;
241
242 for (retries = 0; retries < 10; retries++) {
243 spin_lock_irqsave(&card->card_lock, card->flags);
244 for (a = 0; a < 10; a++) {
245 if (inw(base + 0xe) & 0x1)
246 return 1;
247 udelay(10);
248 }
249 spin_unlock_irqrestore(&card->card_lock, card->flags);
250 msleep(10);
251 }
252 printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n",
253 card->base);
254
255 return 0; /* Failed to acquire the card! */
256 }
257
258 static void unlock_card(struct isi_board *card)
259 {
260 spin_unlock_irqrestore(&card->card_lock, card->flags);
261 }
262
263 /*
264 * ISI Card specific ops ...
265 */
266
267 /* card->lock HAS to be held */
268 static void raise_dtr(struct isi_port *port)
269 {
270 struct isi_board *card = port->card;
271 unsigned long base = card->base;
272 u16 channel = port->channel;
273
274 if (WaitTillCardIsFree(base))
275 return;
276
277 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
278 outw(0x0504, base);
279 InterruptTheCard(base);
280 port->status |= ISI_DTR;
281 }
282
283 /* card->lock HAS to be held */
284 static inline void drop_dtr(struct isi_port *port)
285 {
286 struct isi_board *card = port->card;
287 unsigned long base = card->base;
288 u16 channel = port->channel;
289
290 if (WaitTillCardIsFree(base))
291 return;
292
293 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
294 outw(0x0404, base);
295 InterruptTheCard(base);
296 port->status &= ~ISI_DTR;
297 }
298
299 /* card->lock HAS to be held */
300 static inline void raise_rts(struct isi_port *port)
301 {
302 struct isi_board *card = port->card;
303 unsigned long base = card->base;
304 u16 channel = port->channel;
305
306 if (WaitTillCardIsFree(base))
307 return;
308
309 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
310 outw(0x0a04, base);
311 InterruptTheCard(base);
312 port->status |= ISI_RTS;
313 }
314
315 /* card->lock HAS to be held */
316 static inline void drop_rts(struct isi_port *port)
317 {
318 struct isi_board *card = port->card;
319 unsigned long base = card->base;
320 u16 channel = port->channel;
321
322 if (WaitTillCardIsFree(base))
323 return;
324
325 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
326 outw(0x0804, base);
327 InterruptTheCard(base);
328 port->status &= ~ISI_RTS;
329 }
330
331 /* card->lock MUST NOT be held */
332
333 static void isicom_dtr_rts(struct tty_port *port, int on)
334 {
335 struct isi_port *ip = container_of(port, struct isi_port, port);
336 struct isi_board *card = ip->card;
337 unsigned long base = card->base;
338 u16 channel = ip->channel;
339
340 if (!lock_card(card))
341 return;
342
343 if (on) {
344 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
345 outw(0x0f04, base);
346 InterruptTheCard(base);
347 ip->status |= (ISI_DTR | ISI_RTS);
348 } else {
349 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
350 outw(0x0C04, base);
351 InterruptTheCard(base);
352 ip->status &= ~(ISI_DTR | ISI_RTS);
353 }
354 unlock_card(card);
355 }
356
357 /* card->lock HAS to be held */
358 static void drop_dtr_rts(struct isi_port *port)
359 {
360 struct isi_board *card = port->card;
361 unsigned long base = card->base;
362 u16 channel = port->channel;
363
364 if (WaitTillCardIsFree(base))
365 return;
366
367 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
368 outw(0x0c04, base);
369 InterruptTheCard(base);
370 port->status &= ~(ISI_RTS | ISI_DTR);
371 }
372
373 /*
374 * ISICOM Driver specific routines ...
375 *
376 */
377
378 static inline int __isicom_paranoia_check(struct isi_port const *port,
379 char *name, const char *routine)
380 {
381 if (!port) {
382 printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for "
383 "dev %s in %s.\n", name, routine);
384 return 1;
385 }
386 if (port->magic != ISICOM_MAGIC) {
387 printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for "
388 "dev %s in %s.\n", name, routine);
389 return 1;
390 }
391
392 return 0;
393 }
394
395 /*
396 * Transmitter.
397 *
398 * We shovel data into the card buffers on a regular basis. The card
399 * will do the rest of the work for us.
400 */
401
402 static void isicom_tx(unsigned long _data)
403 {
404 unsigned long flags, base;
405 unsigned int retries;
406 short count = (BOARD_COUNT-1), card;
407 short txcount, wrd, residue, word_count, cnt;
408 struct isi_port *port;
409 struct tty_struct *tty;
410
411 /* find next active board */
412 card = (prev_card + 1) & 0x0003;
413 while (count-- > 0) {
414 if (isi_card[card].status & BOARD_ACTIVE)
415 break;
416 card = (card + 1) & 0x0003;
417 }
418 if (!(isi_card[card].status & BOARD_ACTIVE))
419 goto sched_again;
420
421 prev_card = card;
422
423 count = isi_card[card].port_count;
424 port = isi_card[card].ports;
425 base = isi_card[card].base;
426
427 spin_lock_irqsave(&isi_card[card].card_lock, flags);
428 for (retries = 0; retries < 100; retries++) {
429 if (inw(base + 0xe) & 0x1)
430 break;
431 udelay(2);
432 }
433 if (retries >= 100)
434 goto unlock;
435
436 tty = tty_port_tty_get(&port->port);
437 if (tty == NULL)
438 goto put_unlock;
439
440 for (; count > 0; count--, port++) {
441 /* port not active or tx disabled to force flow control */
442 if (!(port->port.flags & ASYNC_INITIALIZED) ||
443 !(port->status & ISI_TXOK))
444 continue;
445
446 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
447 if (txcount <= 0 || tty->stopped || tty->hw_stopped)
448 continue;
449
450 if (!(inw(base + 0x02) & (1 << port->channel)))
451 continue;
452
453 pr_dbg("txing %d bytes, port%d.\n", txcount,
454 port->channel + 1);
455 outw((port->channel << isi_card[card].shift_count) | txcount,
456 base);
457 residue = NO;
458 wrd = 0;
459 while (1) {
460 cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
461 - port->xmit_tail));
462 if (residue == YES) {
463 residue = NO;
464 if (cnt > 0) {
465 wrd |= (port->port.xmit_buf[port->xmit_tail]
466 << 8);
467 port->xmit_tail = (port->xmit_tail + 1)
468 & (SERIAL_XMIT_SIZE - 1);
469 port->xmit_cnt--;
470 txcount--;
471 cnt--;
472 outw(wrd, base);
473 } else {
474 outw(wrd, base);
475 break;
476 }
477 }
478 if (cnt <= 0)
479 break;
480 word_count = cnt >> 1;
481 outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
482 port->xmit_tail = (port->xmit_tail
483 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
484 txcount -= (word_count << 1);
485 port->xmit_cnt -= (word_count << 1);
486 if (cnt & 0x0001) {
487 residue = YES;
488 wrd = port->port.xmit_buf[port->xmit_tail];
489 port->xmit_tail = (port->xmit_tail + 1)
490 & (SERIAL_XMIT_SIZE - 1);
491 port->xmit_cnt--;
492 txcount--;
493 }
494 }
495
496 InterruptTheCard(base);
497 if (port->xmit_cnt <= 0)
498 port->status &= ~ISI_TXOK;
499 if (port->xmit_cnt <= WAKEUP_CHARS)
500 tty_wakeup(tty);
501 }
502
503 put_unlock:
504 tty_kref_put(tty);
505 unlock:
506 spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
507 /* schedule another tx for hopefully in about 10ms */
508 sched_again:
509 mod_timer(&tx, jiffies + msecs_to_jiffies(10));
510 }
511
512 /*
513 * Main interrupt handler routine
514 */
515
516 static irqreturn_t isicom_interrupt(int irq, void *dev_id)
517 {
518 struct isi_board *card = dev_id;
519 struct isi_port *port;
520 struct tty_struct *tty;
521 unsigned long base;
522 u16 header, word_count, count, channel;
523 short byte_count;
524 unsigned char *rp;
525
526 if (!card || !(card->status & FIRMWARE_LOADED))
527 return IRQ_NONE;
528
529 base = card->base;
530
531 /* did the card interrupt us? */
532 if (!(inw(base + 0x0e) & 0x02))
533 return IRQ_NONE;
534
535 spin_lock(&card->card_lock);
536
537 /*
538 * disable any interrupts from the PCI card and lower the
539 * interrupt line
540 */
541 outw(0x8000, base+0x04);
542 ClearInterrupt(base);
543
544 inw(base); /* get the dummy word out */
545 header = inw(base);
546 channel = (header & 0x7800) >> card->shift_count;
547 byte_count = header & 0xff;
548
549 if (channel + 1 > card->port_count) {
550 printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): "
551 "%d(channel) > port_count.\n", base, channel+1);
552 outw(0x0000, base+0x04); /* enable interrupts */
553 spin_unlock(&card->card_lock);
554 return IRQ_HANDLED;
555 }
556 port = card->ports + channel;
557 if (!(port->port.flags & ASYNC_INITIALIZED)) {
558 outw(0x0000, base+0x04); /* enable interrupts */
559 spin_unlock(&card->card_lock);
560 return IRQ_HANDLED;
561 }
562
563 tty = tty_port_tty_get(&port->port);
564 if (tty == NULL) {
565 word_count = byte_count >> 1;
566 while (byte_count > 1) {
567 inw(base);
568 byte_count -= 2;
569 }
570 if (byte_count & 0x01)
571 inw(base);
572 outw(0x0000, base+0x04); /* enable interrupts */
573 spin_unlock(&card->card_lock);
574 return IRQ_HANDLED;
575 }
576
577 if (header & 0x8000) { /* Status Packet */
578 header = inw(base);
579 switch (header & 0xff) {
580 case 0: /* Change in EIA signals */
581 if (port->port.flags & ASYNC_CHECK_CD) {
582 if (port->status & ISI_DCD) {
583 if (!(header & ISI_DCD)) {
584 /* Carrier has been lost */
585 pr_dbg("interrupt: DCD->low.\n"
586 );
587 port->status &= ~ISI_DCD;
588 tty_hangup(tty);
589 }
590 } else if (header & ISI_DCD) {
591 /* Carrier has been detected */
592 pr_dbg("interrupt: DCD->high.\n");
593 port->status |= ISI_DCD;
594 wake_up_interruptible(&port->port.open_wait);
595 }
596 } else {
597 if (header & ISI_DCD)
598 port->status |= ISI_DCD;
599 else
600 port->status &= ~ISI_DCD;
601 }
602
603 if (port->port.flags & ASYNC_CTS_FLOW) {
604 if (tty->hw_stopped) {
605 if (header & ISI_CTS) {
606 port->port.tty->hw_stopped = 0;
607 /* start tx ing */
608 port->status |= (ISI_TXOK
609 | ISI_CTS);
610 tty_wakeup(tty);
611 }
612 } else if (!(header & ISI_CTS)) {
613 tty->hw_stopped = 1;
614 /* stop tx ing */
615 port->status &= ~(ISI_TXOK | ISI_CTS);
616 }
617 } else {
618 if (header & ISI_CTS)
619 port->status |= ISI_CTS;
620 else
621 port->status &= ~ISI_CTS;
622 }
623
624 if (header & ISI_DSR)
625 port->status |= ISI_DSR;
626 else
627 port->status &= ~ISI_DSR;
628
629 if (header & ISI_RI)
630 port->status |= ISI_RI;
631 else
632 port->status &= ~ISI_RI;
633
634 break;
635
636 case 1: /* Received Break !!! */
637 tty_insert_flip_char(tty, 0, TTY_BREAK);
638 if (port->port.flags & ASYNC_SAK)
639 do_SAK(tty);
640 tty_flip_buffer_push(tty);
641 break;
642
643 case 2: /* Statistics */
644 pr_dbg("isicom_interrupt: stats!!!.\n");
645 break;
646
647 default:
648 pr_dbg("Intr: Unknown code in status packet.\n");
649 break;
650 }
651 } else { /* Data Packet */
652
653 count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
654 pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count);
655 word_count = count >> 1;
656 insw(base, rp, word_count);
657 byte_count -= (word_count << 1);
658 if (count & 0x0001) {
659 tty_insert_flip_char(tty, inw(base) & 0xff,
660 TTY_NORMAL);
661 byte_count -= 2;
662 }
663 if (byte_count > 0) {
664 pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping "
665 "bytes...\n", base, channel + 1);
666 /* drain out unread xtra data */
667 while (byte_count > 0) {
668 inw(base);
669 byte_count -= 2;
670 }
671 }
672 tty_flip_buffer_push(tty);
673 }
674 outw(0x0000, base+0x04); /* enable interrupts */
675 spin_unlock(&card->card_lock);
676 tty_kref_put(tty);
677
678 return IRQ_HANDLED;
679 }
680
681 static void isicom_config_port(struct tty_struct *tty)
682 {
683 struct isi_port *port = tty->driver_data;
684 struct isi_board *card = port->card;
685 unsigned long baud;
686 unsigned long base = card->base;
687 u16 channel_setup, channel = port->channel,
688 shift_count = card->shift_count;
689 unsigned char flow_ctrl;
690
691 /* FIXME: Switch to new tty baud API */
692 baud = C_BAUD(tty);
693 if (baud & CBAUDEX) {
694 baud &= ~CBAUDEX;
695
696 /* if CBAUDEX bit is on and the baud is set to either 50 or 75
697 * then the card is programmed for 57.6Kbps or 115Kbps
698 * respectively.
699 */
700
701 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
702 if (baud < 1 || baud > 4)
703 tty->termios->c_cflag &= ~CBAUDEX;
704 else
705 baud += 15;
706 }
707 if (baud == 15) {
708
709 /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
710 * by the set_serial_info ioctl ... this is done by
711 * the 'setserial' utility.
712 */
713
714 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
715 baud++; /* 57.6 Kbps */
716 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
717 baud += 2; /* 115 Kbps */
718 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
719 baud += 3; /* 230 kbps*/
720 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
721 baud += 4; /* 460 kbps*/
722 }
723 if (linuxb_to_isib[baud] == -1) {
724 /* hang up */
725 drop_dtr(port);
726 return;
727 } else
728 raise_dtr(port);
729
730 if (WaitTillCardIsFree(base) == 0) {
731 outw(0x8000 | (channel << shift_count) | 0x03, base);
732 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
733 channel_setup = 0;
734 switch (C_CSIZE(tty)) {
735 case CS5:
736 channel_setup |= ISICOM_CS5;
737 break;
738 case CS6:
739 channel_setup |= ISICOM_CS6;
740 break;
741 case CS7:
742 channel_setup |= ISICOM_CS7;
743 break;
744 case CS8:
745 channel_setup |= ISICOM_CS8;
746 break;
747 }
748
749 if (C_CSTOPB(tty))
750 channel_setup |= ISICOM_2SB;
751 if (C_PARENB(tty)) {
752 channel_setup |= ISICOM_EVPAR;
753 if (C_PARODD(tty))
754 channel_setup |= ISICOM_ODPAR;
755 }
756 outw(channel_setup, base);
757 InterruptTheCard(base);
758 }
759 if (C_CLOCAL(tty))
760 port->port.flags &= ~ASYNC_CHECK_CD;
761 else
762 port->port.flags |= ASYNC_CHECK_CD;
763
764 /* flow control settings ...*/
765 flow_ctrl = 0;
766 port->port.flags &= ~ASYNC_CTS_FLOW;
767 if (C_CRTSCTS(tty)) {
768 port->port.flags |= ASYNC_CTS_FLOW;
769 flow_ctrl |= ISICOM_CTSRTS;
770 }
771 if (I_IXON(tty))
772 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
773 if (I_IXOFF(tty))
774 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
775
776 if (WaitTillCardIsFree(base) == 0) {
777 outw(0x8000 | (channel << shift_count) | 0x04, base);
778 outw(flow_ctrl << 8 | 0x05, base);
779 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
780 InterruptTheCard(base);
781 }
782
783 /* rx enabled -> enable port for rx on the card */
784 if (C_CREAD(tty)) {
785 card->port_status |= (1 << channel);
786 outw(card->port_status, base + 0x02);
787 }
788 }
789
790 /* open et all */
791
792 static inline void isicom_setup_board(struct isi_board *bp)
793 {
794 int channel;
795 struct isi_port *port;
796
797 bp->count++;
798 if (!(bp->status & BOARD_INIT)) {
799 port = bp->ports;
800 for (channel = 0; channel < bp->port_count; channel++, port++)
801 drop_dtr_rts(port);
802 }
803 bp->status |= BOARD_ACTIVE | BOARD_INIT;
804 }
805
806 /* Activate and thus setup board are protected from races against shutdown
807 by the tty_port mutex */
808
809 static int isicom_activate(struct tty_port *tport, struct tty_struct *tty)
810 {
811 struct isi_port *port = container_of(tport, struct isi_port, port);
812 struct isi_board *card = port->card;
813 unsigned long flags;
814
815 if (tty_port_alloc_xmit_buf(tport) < 0)
816 return -ENOMEM;
817
818 spin_lock_irqsave(&card->card_lock, flags);
819 isicom_setup_board(card);
820
821 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
822
823 /* discard any residual data */
824 if (WaitTillCardIsFree(card->base) == 0) {
825 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
826 card->base);
827 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
828 InterruptTheCard(card->base);
829 }
830 isicom_config_port(tty);
831 spin_unlock_irqrestore(&card->card_lock, flags);
832
833 return 0;
834 }
835
836 static int isicom_carrier_raised(struct tty_port *port)
837 {
838 struct isi_port *ip = container_of(port, struct isi_port, port);
839 return (ip->status & ISI_DCD)?1 : 0;
840 }
841
842 static struct tty_port *isicom_find_port(struct tty_struct *tty)
843 {
844 struct isi_port *port;
845 struct isi_board *card;
846 unsigned int board;
847 int line = tty->index;
848
849 if (line < 0 || line > PORT_COUNT-1)
850 return NULL;
851 board = BOARD(line);
852 card = &isi_card[board];
853
854 if (!(card->status & FIRMWARE_LOADED))
855 return NULL;
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 NULL;
860
861 port = &isi_ports[line];
862 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
863 return NULL;
864
865 return &port->port;
866 }
867
868 static int isicom_open(struct tty_struct *tty, struct file *filp)
869 {
870 struct isi_port *port;
871 struct isi_board *card;
872 struct tty_port *tport;
873
874 tport = isicom_find_port(tty);
875 if (tport == NULL)
876 return -ENODEV;
877 port = container_of(tport, struct isi_port, port);
878 card = &isi_card[BOARD(tty->index)];
879
880 return tty_port_open(tport, tty, filp);
881 }
882
883 /* close et all */
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
890 if (--card->count < 0) {
891 pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n",
892 card->base, card->count);
893 card->count = 0;
894 }
895 /* last port was closed, shutdown that board too */
896 if (!card->count)
897 card->status &= BOARD_ACTIVE;
898 }
899
900 static void isicom_flush_buffer(struct tty_struct *tty)
901 {
902 struct isi_port *port = tty->driver_data;
903 struct isi_board *card = port->card;
904 unsigned long flags;
905
906 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
907 return;
908
909 spin_lock_irqsave(&card->card_lock, flags);
910 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
911 spin_unlock_irqrestore(&card->card_lock, flags);
912
913 tty_wakeup(tty);
914 }
915
916 static void isicom_shutdown(struct tty_port *port)
917 {
918 struct isi_port *ip = container_of(port, struct isi_port, port);
919 struct isi_board *card = ip->card;
920 unsigned long flags;
921
922 /* indicate to the card that no more data can be received
923 on this port */
924 spin_lock_irqsave(&card->card_lock, flags);
925 card->port_status &= ~(1 << ip->channel);
926 outw(card->port_status, card->base + 0x02);
927 isicom_shutdown_port(ip);
928 spin_unlock_irqrestore(&card->card_lock, flags);
929 tty_port_free_xmit_buf(port);
930 }
931
932 static void isicom_close(struct tty_struct *tty, struct file *filp)
933 {
934 struct isi_port *ip = tty->driver_data;
935 struct tty_port *port = &ip->port;
936 if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
937 return;
938 tty_port_close(port, tty, filp);
939 }
940
941 /* write et all */
942 static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
943 int count)
944 {
945 struct isi_port *port = tty->driver_data;
946 struct isi_board *card = port->card;
947 unsigned long flags;
948 int cnt, total = 0;
949
950 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
951 return 0;
952
953 spin_lock_irqsave(&card->card_lock, flags);
954
955 while (1) {
956 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
957 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
958 if (cnt <= 0)
959 break;
960
961 memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
962 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
963 - 1);
964 port->xmit_cnt += cnt;
965 buf += cnt;
966 count -= cnt;
967 total += cnt;
968 }
969 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
970 port->status |= ISI_TXOK;
971 spin_unlock_irqrestore(&card->card_lock, flags);
972 return total;
973 }
974
975 /* put_char et all */
976 static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
977 {
978 struct isi_port *port = tty->driver_data;
979 struct isi_board *card = port->card;
980 unsigned long flags;
981
982 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
983 return 0;
984
985 spin_lock_irqsave(&card->card_lock, flags);
986 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
987 spin_unlock_irqrestore(&card->card_lock, flags);
988 return 0;
989 }
990
991 port->port.xmit_buf[port->xmit_head++] = ch;
992 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
993 port->xmit_cnt++;
994 spin_unlock_irqrestore(&card->card_lock, flags);
995 return 1;
996 }
997
998 /* flush_chars et all */
999 static void isicom_flush_chars(struct tty_struct *tty)
1000 {
1001 struct isi_port *port = tty->driver_data;
1002
1003 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1004 return;
1005
1006 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1007 !port->port.xmit_buf)
1008 return;
1009
1010 /* this tells the transmitter to consider this port for
1011 data output to the card ... that's the best we can do. */
1012 port->status |= ISI_TXOK;
1013 }
1014
1015 /* write_room et all */
1016 static int isicom_write_room(struct tty_struct *tty)
1017 {
1018 struct isi_port *port = tty->driver_data;
1019 int free;
1020
1021 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1022 return 0;
1023
1024 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1025 if (free < 0)
1026 free = 0;
1027 return free;
1028 }
1029
1030 /* chars_in_buffer et all */
1031 static int isicom_chars_in_buffer(struct tty_struct *tty)
1032 {
1033 struct isi_port *port = tty->driver_data;
1034 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1035 return 0;
1036 return port->xmit_cnt;
1037 }
1038
1039 /* ioctl et all */
1040 static int isicom_send_break(struct tty_struct *tty, int length)
1041 {
1042 struct isi_port *port = tty->driver_data;
1043 struct isi_board *card = port->card;
1044 unsigned long base = card->base;
1045
1046 if (length == -1)
1047 return -EOPNOTSUPP;
1048
1049 if (!lock_card(card))
1050 return -EINVAL;
1051
1052 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1053 outw((length & 0xff) << 8 | 0x00, base);
1054 outw((length & 0xff00), base);
1055 InterruptTheCard(base);
1056
1057 unlock_card(card);
1058 return 0;
1059 }
1060
1061 static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
1062 {
1063 struct isi_port *port = tty->driver_data;
1064 /* just send the port status */
1065 u16 status = port->status;
1066
1067 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1068 return -ENODEV;
1069
1070 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1071 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1072 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1073 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1074 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1075 ((status & ISI_RI ) ? TIOCM_RI : 0);
1076 }
1077
1078 static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
1079 unsigned int set, unsigned int clear)
1080 {
1081 struct isi_port *port = tty->driver_data;
1082 unsigned long flags;
1083
1084 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1085 return -ENODEV;
1086
1087 spin_lock_irqsave(&port->card->card_lock, flags);
1088 if (set & TIOCM_RTS)
1089 raise_rts(port);
1090 if (set & TIOCM_DTR)
1091 raise_dtr(port);
1092
1093 if (clear & TIOCM_RTS)
1094 drop_rts(port);
1095 if (clear & TIOCM_DTR)
1096 drop_dtr(port);
1097 spin_unlock_irqrestore(&port->card->card_lock, flags);
1098
1099 return 0;
1100 }
1101
1102 static int isicom_set_serial_info(struct tty_struct *tty,
1103 struct serial_struct __user *info)
1104 {
1105 struct isi_port *port = tty->driver_data;
1106 struct serial_struct newinfo;
1107 int reconfig_port;
1108
1109 if (copy_from_user(&newinfo, info, sizeof(newinfo)))
1110 return -EFAULT;
1111
1112 lock_kernel();
1113
1114 reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
1115 (newinfo.flags & ASYNC_SPD_MASK));
1116
1117 if (!capable(CAP_SYS_ADMIN)) {
1118 if ((newinfo.close_delay != port->port.close_delay) ||
1119 (newinfo.closing_wait != port->port.closing_wait) ||
1120 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1121 (port->port.flags & ~ASYNC_USR_MASK))) {
1122 unlock_kernel();
1123 return -EPERM;
1124 }
1125 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1126 (newinfo.flags & ASYNC_USR_MASK));
1127 } else {
1128 port->port.close_delay = newinfo.close_delay;
1129 port->port.closing_wait = newinfo.closing_wait;
1130 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1131 (newinfo.flags & ASYNC_FLAGS));
1132 }
1133 if (reconfig_port) {
1134 unsigned long flags;
1135 spin_lock_irqsave(&port->card->card_lock, flags);
1136 isicom_config_port(tty);
1137 spin_unlock_irqrestore(&port->card->card_lock, flags);
1138 }
1139 unlock_kernel();
1140 return 0;
1141 }
1142
1143 static int isicom_get_serial_info(struct isi_port *port,
1144 struct serial_struct __user *info)
1145 {
1146 struct serial_struct out_info;
1147
1148 lock_kernel();
1149 memset(&out_info, 0, sizeof(out_info));
1150 /* out_info.type = ? */
1151 out_info.line = port - isi_ports;
1152 out_info.port = port->card->base;
1153 out_info.irq = port->card->irq;
1154 out_info.flags = port->port.flags;
1155 /* out_info.baud_base = ? */
1156 out_info.close_delay = port->port.close_delay;
1157 out_info.closing_wait = port->port.closing_wait;
1158 unlock_kernel();
1159 if (copy_to_user(info, &out_info, sizeof(out_info)))
1160 return -EFAULT;
1161 return 0;
1162 }
1163
1164 static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
1165 unsigned int cmd, unsigned long arg)
1166 {
1167 struct isi_port *port = tty->driver_data;
1168 void __user *argp = (void __user *)arg;
1169
1170 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1171 return -ENODEV;
1172
1173 switch (cmd) {
1174 case TIOCGSERIAL:
1175 return isicom_get_serial_info(port, argp);
1176
1177 case TIOCSSERIAL:
1178 return isicom_set_serial_info(tty, argp);
1179
1180 default:
1181 return -ENOIOCTLCMD;
1182 }
1183 return 0;
1184 }
1185
1186 /* set_termios et all */
1187 static void isicom_set_termios(struct tty_struct *tty,
1188 struct ktermios *old_termios)
1189 {
1190 struct isi_port *port = tty->driver_data;
1191 unsigned long flags;
1192
1193 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1194 return;
1195
1196 if (tty->termios->c_cflag == old_termios->c_cflag &&
1197 tty->termios->c_iflag == old_termios->c_iflag)
1198 return;
1199
1200 spin_lock_irqsave(&port->card->card_lock, flags);
1201 isicom_config_port(tty);
1202 spin_unlock_irqrestore(&port->card->card_lock, flags);
1203
1204 if ((old_termios->c_cflag & CRTSCTS) &&
1205 !(tty->termios->c_cflag & CRTSCTS)) {
1206 tty->hw_stopped = 0;
1207 isicom_start(tty);
1208 }
1209 }
1210
1211 /* throttle et all */
1212 static void isicom_throttle(struct tty_struct *tty)
1213 {
1214 struct isi_port *port = tty->driver_data;
1215 struct isi_board *card = port->card;
1216
1217 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1218 return;
1219
1220 /* tell the card that this port cannot handle any more data for now */
1221 card->port_status &= ~(1 << port->channel);
1222 outw(card->port_status, card->base + 0x02);
1223 }
1224
1225 /* unthrottle et all */
1226 static void isicom_unthrottle(struct tty_struct *tty)
1227 {
1228 struct isi_port *port = tty->driver_data;
1229 struct isi_board *card = port->card;
1230
1231 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1232 return;
1233
1234 /* tell the card that this port is ready to accept more data */
1235 card->port_status |= (1 << port->channel);
1236 outw(card->port_status, card->base + 0x02);
1237 }
1238
1239 /* stop et all */
1240 static void isicom_stop(struct tty_struct *tty)
1241 {
1242 struct isi_port *port = tty->driver_data;
1243
1244 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1245 return;
1246
1247 /* this tells the transmitter not to consider this port for
1248 data output to the card. */
1249 port->status &= ~ISI_TXOK;
1250 }
1251
1252 /* start et all */
1253 static void isicom_start(struct tty_struct *tty)
1254 {
1255 struct isi_port *port = tty->driver_data;
1256
1257 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1258 return;
1259
1260 /* this tells the transmitter to consider this port for
1261 data output to the card. */
1262 port->status |= ISI_TXOK;
1263 }
1264
1265 static void isicom_hangup(struct tty_struct *tty)
1266 {
1267 struct isi_port *port = tty->driver_data;
1268
1269 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1270 return;
1271 tty_port_hangup(&port->port);
1272 }
1273
1274
1275 /*
1276 * Driver init and deinit functions
1277 */
1278
1279 static const struct tty_operations isicom_ops = {
1280 .open = isicom_open,
1281 .close = isicom_close,
1282 .write = isicom_write,
1283 .put_char = isicom_put_char,
1284 .flush_chars = isicom_flush_chars,
1285 .write_room = isicom_write_room,
1286 .chars_in_buffer = isicom_chars_in_buffer,
1287 .ioctl = isicom_ioctl,
1288 .set_termios = isicom_set_termios,
1289 .throttle = isicom_throttle,
1290 .unthrottle = isicom_unthrottle,
1291 .stop = isicom_stop,
1292 .start = isicom_start,
1293 .hangup = isicom_hangup,
1294 .flush_buffer = isicom_flush_buffer,
1295 .tiocmget = isicom_tiocmget,
1296 .tiocmset = isicom_tiocmset,
1297 .break_ctl = isicom_send_break,
1298 };
1299
1300 static const struct tty_port_operations isicom_port_ops = {
1301 .carrier_raised = isicom_carrier_raised,
1302 .dtr_rts = isicom_dtr_rts,
1303 .activate = isicom_activate,
1304 .shutdown = isicom_shutdown,
1305 };
1306
1307 static int __devinit reset_card(struct pci_dev *pdev,
1308 const unsigned int card, unsigned int *signature)
1309 {
1310 struct isi_board *board = pci_get_drvdata(pdev);
1311 unsigned long base = board->base;
1312 unsigned int sig, portcount = 0;
1313 int retval = 0;
1314
1315 dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1316 base);
1317
1318 inw(base + 0x8);
1319
1320 msleep(10);
1321
1322 outw(0, base + 0x8); /* Reset */
1323
1324 msleep(1000);
1325
1326 sig = inw(base + 0x4) & 0xff;
1327
1328 if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1329 sig != 0xee) {
1330 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1331 "bad I/O Port Address 0x%lx).\n", card + 1, base);
1332 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1333 retval = -EIO;
1334 goto end;
1335 }
1336
1337 msleep(10);
1338
1339 portcount = inw(base + 0x2);
1340 if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1341 portcount != 8 && portcount != 16)) {
1342 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1343 card + 1);
1344 retval = -EIO;
1345 goto end;
1346 }
1347
1348 switch (sig) {
1349 case 0xa5:
1350 case 0xbb:
1351 case 0xdd:
1352 board->port_count = (portcount == 4) ? 4 : 8;
1353 board->shift_count = 12;
1354 break;
1355 case 0xcc:
1356 case 0xee:
1357 board->port_count = 16;
1358 board->shift_count = 11;
1359 break;
1360 }
1361 dev_info(&pdev->dev, "-Done\n");
1362 *signature = sig;
1363
1364 end:
1365 return retval;
1366 }
1367
1368 static int __devinit load_firmware(struct pci_dev *pdev,
1369 const unsigned int index, const unsigned int signature)
1370 {
1371 struct isi_board *board = pci_get_drvdata(pdev);
1372 const struct firmware *fw;
1373 unsigned long base = board->base;
1374 unsigned int a;
1375 u16 word_count, status;
1376 int retval = -EIO;
1377 char *name;
1378 u8 *data;
1379
1380 struct stframe {
1381 u16 addr;
1382 u16 count;
1383 u8 data[0];
1384 } *frame;
1385
1386 switch (signature) {
1387 case 0xa5:
1388 name = "isi608.bin";
1389 break;
1390 case 0xbb:
1391 name = "isi608em.bin";
1392 break;
1393 case 0xcc:
1394 name = "isi616em.bin";
1395 break;
1396 case 0xdd:
1397 name = "isi4608.bin";
1398 break;
1399 case 0xee:
1400 name = "isi4616.bin";
1401 break;
1402 default:
1403 dev_err(&pdev->dev, "Unknown signature.\n");
1404 goto end;
1405 }
1406
1407 retval = request_firmware(&fw, name, &pdev->dev);
1408 if (retval)
1409 goto end;
1410
1411 retval = -EIO;
1412
1413 for (frame = (struct stframe *)fw->data;
1414 frame < (struct stframe *)(fw->data + fw->size);
1415 frame = (struct stframe *)((u8 *)(frame + 1) +
1416 frame->count)) {
1417 if (WaitTillCardIsFree(base))
1418 goto errrelfw;
1419
1420 outw(0xf0, base); /* start upload sequence */
1421 outw(0x00, base);
1422 outw(frame->addr, base); /* lsb of address */
1423
1424 word_count = frame->count / 2 + frame->count % 2;
1425 outw(word_count, base);
1426 InterruptTheCard(base);
1427
1428 udelay(100); /* 0x2f */
1429
1430 if (WaitTillCardIsFree(base))
1431 goto errrelfw;
1432
1433 status = inw(base + 0x4);
1434 if (status != 0) {
1435 dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1436 "Address:0x%x\n"
1437 "Count:0x%x\n"
1438 "Status:0x%x\n",
1439 index + 1, frame->addr, frame->count, status);
1440 goto errrelfw;
1441 }
1442 outsw(base, frame->data, word_count);
1443
1444 InterruptTheCard(base);
1445
1446 udelay(50); /* 0x0f */
1447
1448 if (WaitTillCardIsFree(base))
1449 goto errrelfw;
1450
1451 status = inw(base + 0x4);
1452 if (status != 0) {
1453 dev_err(&pdev->dev, "Card%d got out of sync.Card "
1454 "Status:0x%x\n", index + 1, status);
1455 goto errrelfw;
1456 }
1457 }
1458
1459 /* XXX: should we test it by reading it back and comparing with original like
1460 * in load firmware package? */
1461 for (frame = (struct stframe *)fw->data;
1462 frame < (struct stframe *)(fw->data + fw->size);
1463 frame = (struct stframe *)((u8 *)(frame + 1) +
1464 frame->count)) {
1465 if (WaitTillCardIsFree(base))
1466 goto errrelfw;
1467
1468 outw(0xf1, base); /* start download sequence */
1469 outw(0x00, base);
1470 outw(frame->addr, base); /* lsb of address */
1471
1472 word_count = (frame->count >> 1) + frame->count % 2;
1473 outw(word_count + 1, base);
1474 InterruptTheCard(base);
1475
1476 udelay(50); /* 0xf */
1477
1478 if (WaitTillCardIsFree(base))
1479 goto errrelfw;
1480
1481 status = inw(base + 0x4);
1482 if (status != 0) {
1483 dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1484 "Address:0x%x\n"
1485 "Count:0x%x\n"
1486 "Status: 0x%x\n",
1487 index + 1, frame->addr, frame->count, status);
1488 goto errrelfw;
1489 }
1490
1491 data = kmalloc(word_count * 2, GFP_KERNEL);
1492 if (data == NULL) {
1493 dev_err(&pdev->dev, "Card%d, firmware upload "
1494 "failed, not enough memory\n", index + 1);
1495 goto errrelfw;
1496 }
1497 inw(base);
1498 insw(base, data, word_count);
1499 InterruptTheCard(base);
1500
1501 for (a = 0; a < frame->count; a++)
1502 if (data[a] != frame->data[a]) {
1503 kfree(data);
1504 dev_err(&pdev->dev, "Card%d, firmware upload "
1505 "failed\n", index + 1);
1506 goto errrelfw;
1507 }
1508 kfree(data);
1509
1510 udelay(50); /* 0xf */
1511
1512 if (WaitTillCardIsFree(base))
1513 goto errrelfw;
1514
1515 status = inw(base + 0x4);
1516 if (status != 0) {
1517 dev_err(&pdev->dev, "Card%d verify got out of sync. "
1518 "Card Status:0x%x\n", index + 1, status);
1519 goto errrelfw;
1520 }
1521 }
1522
1523 /* xfer ctrl */
1524 if (WaitTillCardIsFree(base))
1525 goto errrelfw;
1526
1527 outw(0xf2, base);
1528 outw(0x800, base);
1529 outw(0x0, base);
1530 outw(0x0, base);
1531 InterruptTheCard(base);
1532 outw(0x0, base + 0x4); /* for ISI4608 cards */
1533
1534 board->status |= FIRMWARE_LOADED;
1535 retval = 0;
1536
1537 errrelfw:
1538 release_firmware(fw);
1539 end:
1540 return retval;
1541 }
1542
1543 /*
1544 * Insmod can set static symbols so keep these static
1545 */
1546 static unsigned int card_count;
1547
1548 static int __devinit isicom_probe(struct pci_dev *pdev,
1549 const struct pci_device_id *ent)
1550 {
1551 unsigned int uninitialized_var(signature), index;
1552 int retval = -EPERM;
1553 struct isi_board *board = NULL;
1554
1555 if (card_count >= BOARD_COUNT)
1556 goto err;
1557
1558 retval = pci_enable_device(pdev);
1559 if (retval) {
1560 dev_err(&pdev->dev, "failed to enable\n");
1561 goto err;
1562 }
1563
1564 dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1565
1566 /* allot the first empty slot in the array */
1567 for (index = 0; index < BOARD_COUNT; index++)
1568 if (isi_card[index].base == 0) {
1569 board = &isi_card[index];
1570 break;
1571 }
1572
1573 board->index = index;
1574 board->base = pci_resource_start(pdev, 3);
1575 board->irq = pdev->irq;
1576 card_count++;
1577
1578 pci_set_drvdata(pdev, board);
1579
1580 retval = pci_request_region(pdev, 3, ISICOM_NAME);
1581 if (retval) {
1582 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1583 "will be disabled.\n", board->base, board->base + 15,
1584 index + 1);
1585 retval = -EBUSY;
1586 goto errdec;
1587 }
1588
1589 retval = request_irq(board->irq, isicom_interrupt,
1590 IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board);
1591 if (retval < 0) {
1592 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1593 "Card%d will be disabled.\n", board->irq, index + 1);
1594 goto errunrr;
1595 }
1596
1597 retval = reset_card(pdev, index, &signature);
1598 if (retval < 0)
1599 goto errunri;
1600
1601 retval = load_firmware(pdev, index, signature);
1602 if (retval < 0)
1603 goto errunri;
1604
1605 for (index = 0; index < board->port_count; index++)
1606 tty_register_device(isicom_normal, board->index * 16 + index,
1607 &pdev->dev);
1608
1609 return 0;
1610
1611 errunri:
1612 free_irq(board->irq, board);
1613 errunrr:
1614 pci_release_region(pdev, 3);
1615 errdec:
1616 board->base = 0;
1617 card_count--;
1618 pci_disable_device(pdev);
1619 err:
1620 return retval;
1621 }
1622
1623 static void __devexit isicom_remove(struct pci_dev *pdev)
1624 {
1625 struct isi_board *board = pci_get_drvdata(pdev);
1626 unsigned int i;
1627
1628 for (i = 0; i < board->port_count; i++)
1629 tty_unregister_device(isicom_normal, board->index * 16 + i);
1630
1631 free_irq(board->irq, board);
1632 pci_release_region(pdev, 3);
1633 board->base = 0;
1634 card_count--;
1635 pci_disable_device(pdev);
1636 }
1637
1638 static int __init isicom_init(void)
1639 {
1640 int retval, idx, channel;
1641 struct isi_port *port;
1642
1643 for (idx = 0; idx < BOARD_COUNT; idx++) {
1644 port = &isi_ports[idx * 16];
1645 isi_card[idx].ports = port;
1646 spin_lock_init(&isi_card[idx].card_lock);
1647 for (channel = 0; channel < 16; channel++, port++) {
1648 tty_port_init(&port->port);
1649 port->port.ops = &isicom_port_ops;
1650 port->magic = ISICOM_MAGIC;
1651 port->card = &isi_card[idx];
1652 port->channel = channel;
1653 port->port.close_delay = 50 * HZ/100;
1654 port->port.closing_wait = 3000 * HZ/100;
1655 port->status = 0;
1656 /* . . . */
1657 }
1658 isi_card[idx].base = 0;
1659 isi_card[idx].irq = 0;
1660 }
1661
1662 /* tty driver structure initialization */
1663 isicom_normal = alloc_tty_driver(PORT_COUNT);
1664 if (!isicom_normal) {
1665 retval = -ENOMEM;
1666 goto error;
1667 }
1668
1669 isicom_normal->owner = THIS_MODULE;
1670 isicom_normal->name = "ttyM";
1671 isicom_normal->major = ISICOM_NMAJOR;
1672 isicom_normal->minor_start = 0;
1673 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1674 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1675 isicom_normal->init_termios = tty_std_termios;
1676 isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
1677 CLOCAL;
1678 isicom_normal->flags = TTY_DRIVER_REAL_RAW |
1679 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
1680 tty_set_operations(isicom_normal, &isicom_ops);
1681
1682 retval = tty_register_driver(isicom_normal);
1683 if (retval) {
1684 pr_dbg("Couldn't register the dialin driver\n");
1685 goto err_puttty;
1686 }
1687
1688 retval = pci_register_driver(&isicom_driver);
1689 if (retval < 0) {
1690 printk(KERN_ERR "ISICOM: Unable to register pci driver.\n");
1691 goto err_unrtty;
1692 }
1693
1694 mod_timer(&tx, jiffies + 1);
1695
1696 return 0;
1697 err_unrtty:
1698 tty_unregister_driver(isicom_normal);
1699 err_puttty:
1700 put_tty_driver(isicom_normal);
1701 error:
1702 return retval;
1703 }
1704
1705 static void __exit isicom_exit(void)
1706 {
1707 del_timer_sync(&tx);
1708
1709 pci_unregister_driver(&isicom_driver);
1710 tty_unregister_driver(isicom_normal);
1711 put_tty_driver(isicom_normal);
1712 }
1713
1714 module_init(isicom_init);
1715 module_exit(isicom_exit);
1716
1717 MODULE_AUTHOR("MultiTech");
1718 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1719 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree