?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[PATCH] gfs2: ->readpages() fixes
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / char / isicom.c
blobe9e9bf31c369ef9b8b96cd3f65ac463647b7af69
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@redhat.com Merge to 2.0.x kernel tree
11 * Obtain and use official major/minors
12 * Loader switched to a misc device
13 * (fixed range check bug as a side effect)
14 * Printk clean up
15 * 9/12/98 alan@redhat.com Rough port to 2.1.x
16 *
17 * 10/6/99 sameer Merged the ISA and PCI drivers to
18 * a new unified driver.
19 *
20 * 3/9/99 sameer Added support for ISI4616 cards.
21 *
22 * 16/9/99 sameer We do not force RTS low anymore.
23 * This is to prevent the firmware
24 * from getting confused.
25 *
26 * 26/10/99 sameer Cosmetic changes:The driver now
27 * dumps the Port Count information
28 * along with I/O address and IRQ.
29 *
30 * 13/12/99 sameer Fixed the problem with IRQ sharing.
31 *
32 * 10/5/00 sameer Fixed isicom_shutdown_board()
33 * to not lower DTR on all the ports
34 * when the last port on the card is
35 * closed.
36 *
37 * 10/5/00 sameer Signal mask setup command added
38 * to isicom_setup_port and
39 * isicom_shutdown_port.
40 *
41 * 24/5/00 sameer The driver is now SMP aware.
42 *
43 *
44 * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem
45 *
46 *
47 * 03/01/01 anil .s Added support for resetting the
48 * internal modems on ISI cards.
49 *
50 * 08/02/01 anil .s Upgraded the driver for kernel
51 * 2.4.x
52 *
53 * 11/04/01 Kevin Fixed firmware load problem with
54 * ISIHP-4X card
55 *
56 * 30/04/01 anil .s Fixed the remote login through
57 * ISI port problem. Now the link
58 * does not go down before password
59 * prompt.
60 *
61 * 03/05/01 anil .s Fixed the problem with IRQ sharing
62 * among ISI-PCI cards.
63 *
64 * 03/05/01 anil .s Added support to display the version
65 * info during insmod as well as module
66 * listing by lsmod.
67 *
68 * 10/05/01 anil .s Done the modifications to the source
69 * file and Install script so that the
70 * same installation can be used for
71 * 2.2.x and 2.4.x kernel.
72 *
73 * 06/06/01 anil .s Now we drop both dtr and rts during
74 * shutdown_port as well as raise them
75 * during isicom_config_port.
76 *
77 * 09/06/01 acme@conectiva.com.br use capable, not suser, do
78 * restore_flags on failure in
79 * isicom_send_break, verify put_user
80 * result
81 *
82 * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps
83 * Baud index extended to 21
84 *
85 * 20/03/03 ranjeeth Made to work for Linux Advanced server.
86 * Taken care of license warning.
87 *
88 * 10/12/03 Ravindra Made to work for Fedora Core 1 of
89 * Red Hat Distribution
90 *
91 * 06/01/05 Alan Cox Merged the ISI and base kernel strands
92 * into a single 2.6 driver
93 *
94 * ***********************************************************
95 *
96 * To use this driver you also need the support package. You
97 * can find this in RPM format on
98 * ftp://ftp.linux.org.uk/pub/linux/alan
99 *
100 * You can find the original tools for this direct from Multitech
101 * ftp://ftp.multitech.com/ISI-Cards/
102 *
103 * Having installed the cards the module options (/etc/modprobe.conf)
104 *
105 * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4
106 *
107 * Omit those entries for boards you don't have installed.
108 *
109 * TODO
110 * Merge testing
111 * 64-bit verification
112 */
113
114 #include <linux/module.h>
115 #include <linux/firmware.h>
116 #include <linux/kernel.h>
117 #include <linux/tty.h>
118 #include <linux/tty_flip.h>
119 #include <linux/termios.h>
120 #include <linux/fs.h>
121 #include <linux/sched.h>
122 #include <linux/serial.h>
123 #include <linux/mm.h>
124 #include <linux/interrupt.h>
125 #include <linux/timer.h>
126 #include <linux/delay.h>
127 #include <linux/ioport.h>
128
129 #include <asm/uaccess.h>
130 #include <asm/io.h>
131 #include <asm/system.h>
132
133 #include <linux/pci.h>
134
135 #include <linux/isicom.h>
136
137 #define InterruptTheCard(base) outw(0, (base) + 0xc)
138 #define ClearInterrupt(base) inw((base) + 0x0a)
139
140 #ifdef DEBUG
141 #define pr_dbg(str...) printk(KERN_DEBUG "ISICOM: " str)
142 #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
143 #else
144 #define pr_dbg(str...) do { } while (0)
145 #define isicom_paranoia_check(a, b, c) 0
146 #endif
147
148 static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
149 static void __devexit isicom_remove(struct pci_dev *);
150
151 static struct pci_device_id isicom_pci_tbl[] = {
152 { PCI_DEVICE(VENDOR_ID, 0x2028) },
153 { PCI_DEVICE(VENDOR_ID, 0x2051) },
154 { PCI_DEVICE(VENDOR_ID, 0x2052) },
155 { PCI_DEVICE(VENDOR_ID, 0x2053) },
156 { PCI_DEVICE(VENDOR_ID, 0x2054) },
157 { PCI_DEVICE(VENDOR_ID, 0x2055) },
158 { PCI_DEVICE(VENDOR_ID, 0x2056) },
159 { PCI_DEVICE(VENDOR_ID, 0x2057) },
160 { PCI_DEVICE(VENDOR_ID, 0x2058) },
161 { 0 }
162 };
163 MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
164
165 static struct pci_driver isicom_driver = {
166 .name = "isicom",
167 .id_table = isicom_pci_tbl,
168 .probe = isicom_probe,
169 .remove = __devexit_p(isicom_remove)
170 };
171
172 static int prev_card = 3; /* start servicing isi_card[0] */
173 static struct tty_driver *isicom_normal;
174
175 static struct timer_list tx;
176 static char re_schedule = 1;
177
178 static void isicom_tx(unsigned long _data);
179 static void isicom_start(struct tty_struct *tty);
180
181 /* baud index mappings from linux defns to isi */
182
183 static signed char linuxb_to_isib[] = {
184 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19
185 };
186
187 struct isi_board {
188 unsigned long base;
189 unsigned char irq;
190 unsigned char port_count;
191 unsigned short status;
192 unsigned short port_status; /* each bit for each port */
193 unsigned short shift_count;
194 struct isi_port * ports;
195 signed char count;
196 unsigned char isa;
197 spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
198 unsigned long flags;
199 };
200
201 struct isi_port {
202 unsigned short magic;
203 unsigned int flags;
204 int count;
205 int blocked_open;
206 int close_delay;
207 u16 channel;
208 u16 status;
209 u16 closing_wait;
210 struct isi_board * card;
211 struct tty_struct * tty;
212 wait_queue_head_t close_wait;
213 wait_queue_head_t open_wait;
214 struct work_struct hangup_tq;
215 struct work_struct bh_tqueue;
216 unsigned char * xmit_buf;
217 int xmit_head;
218 int xmit_tail;
219 int xmit_cnt;
220 };
221
222 static struct isi_board isi_card[BOARD_COUNT];
223 static struct isi_port isi_ports[PORT_COUNT];
224
225 /*
226 * Locking functions for card level locking. We need to own both
227 * the kernel lock for the card and have the card in a position that
228 * it wants to talk.
229 */
230
231 static int lock_card(struct isi_board *card)
232 {
233 char retries;
234 unsigned long base = card->base;
235
236 for (retries = 0; retries < 100; retries++) {
237 spin_lock_irqsave(&card->card_lock, card->flags);
238 if (inw(base + 0xe) & 0x1) {
239 return 1;
240 } else {
241 spin_unlock_irqrestore(&card->card_lock, card->flags);
242 udelay(1000); /* 1ms */
243 }
244 }
245 printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n",
246 card->base);
247
248 return 0; /* Failed to acquire the card! */
249 }
250
251 static int lock_card_at_interrupt(struct isi_board *card)
252 {
253 unsigned char retries;
254 unsigned long base = card->base;
255
256 for (retries = 0; retries < 200; retries++) {
257 spin_lock_irqsave(&card->card_lock, card->flags);
258
259 if (inw(base + 0xe) & 0x1)
260 return 1;
261 else
262 spin_unlock_irqrestore(&card->card_lock, card->flags);
263 }
264 /* Failing in interrupt is an acceptable event */
265 return 0; /* Failed to acquire the card! */
266 }
267
268 static void unlock_card(struct isi_board *card)
269 {
270 spin_unlock_irqrestore(&card->card_lock, card->flags);
271 }
272
273 /*
274 * ISI Card specific ops ...
275 */
276
277 static void raise_dtr(struct isi_port *port)
278 {
279 struct isi_board *card = port->card;
280 unsigned long base = card->base;
281 u16 channel = port->channel;
282
283 if (!lock_card(card))
284 return;
285
286 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
287 outw(0x0504, base);
288 InterruptTheCard(base);
289 port->status |= ISI_DTR;
290 unlock_card(card);
291 }
292
293 static inline void drop_dtr(struct isi_port *port)
294 {
295 struct isi_board *card = port->card;
296 unsigned long base = card->base;
297 u16 channel = port->channel;
298
299 if (!lock_card(card))
300 return;
301
302 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
303 outw(0x0404, base);
304 InterruptTheCard(base);
305 port->status &= ~ISI_DTR;
306 unlock_card(card);
307 }
308
309 static inline void raise_rts(struct isi_port *port)
310 {
311 struct isi_board *card = port->card;
312 unsigned long base = card->base;
313 u16 channel = port->channel;
314
315 if (!lock_card(card))
316 return;
317
318 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
319 outw(0x0a04, base);
320 InterruptTheCard(base);
321 port->status |= ISI_RTS;
322 unlock_card(card);
323 }
324 static inline void drop_rts(struct isi_port *port)
325 {
326 struct isi_board *card = port->card;
327 unsigned long base = card->base;
328 u16 channel = port->channel;
329
330 if (!lock_card(card))
331 return;
332
333 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
334 outw(0x0804, base);
335 InterruptTheCard(base);
336 port->status &= ~ISI_RTS;
337 unlock_card(card);
338 }
339
340 static inline void raise_dtr_rts(struct isi_port *port)
341 {
342 struct isi_board *card = port->card;
343 unsigned long base = card->base;
344 u16 channel = port->channel;
345
346 if (!lock_card(card))
347 return;
348
349 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
350 outw(0x0f04, base);
351 InterruptTheCard(base);
352 port->status |= (ISI_DTR | ISI_RTS);
353 unlock_card(card);
354 }
355
356 static void drop_dtr_rts(struct isi_port *port)
357 {
358 struct isi_board *card = port->card;
359 unsigned long base = card->base;
360 u16 channel = port->channel;
361
362 if (!lock_card(card))
363 return;
364
365 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
366 outw(0x0c04, base);
367 InterruptTheCard(base);
368 port->status &= ~(ISI_RTS | ISI_DTR);
369 unlock_card(card);
370 }
371
372 static inline void kill_queue(struct isi_port *port, short queue)
373 {
374 struct isi_board *card = port->card;
375 unsigned long base = card->base;
376 u16 channel = port->channel;
377
378 if (!lock_card(card))
379 return;
380
381 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
382 outw((queue << 8) | 0x06, base);
383 InterruptTheCard(base);
384 unlock_card(card);
385 }
386
387 /*
388 * ISICOM Driver specific routines ...
389 *
390 */
391
392 static inline int __isicom_paranoia_check(struct isi_port const *port,
393 char *name, const char *routine)
394 {
395 if (!port) {
396 printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for "
397 "dev %s in %s.\n", name, routine);
398 return 1;
399 }
400 if (port->magic != ISICOM_MAGIC) {
401 printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for "
402 "dev %s in %s.\n", name, routine);
403 return 1;
404 }
405
406 return 0;
407 }
408
409 /*
410 * Transmitter.
411 *
412 * We shovel data into the card buffers on a regular basis. The card
413 * will do the rest of the work for us.
414 */
415
416 static void isicom_tx(unsigned long _data)
417 {
418 short count = (BOARD_COUNT-1), card, base;
419 short txcount, wrd, residue, word_count, cnt;
420 struct isi_port *port;
421 struct tty_struct *tty;
422
423 /* find next active board */
424 card = (prev_card + 1) & 0x0003;
425 while(count-- > 0) {
426 if (isi_card[card].status & BOARD_ACTIVE)
427 break;
428 card = (card + 1) & 0x0003;
429 }
430 if (!(isi_card[card].status & BOARD_ACTIVE))
431 goto sched_again;
432
433 prev_card = card;
434
435 count = isi_card[card].port_count;
436 port = isi_card[card].ports;
437 base = isi_card[card].base;
438 for (;count > 0;count--, port++) {
439 if (!lock_card_at_interrupt(&isi_card[card]))
440 continue;
441 /* port not active or tx disabled to force flow control */
442 if (!(port->flags & ASYNC_INITIALIZED) ||
443 !(port->status & ISI_TXOK))
444 unlock_card(&isi_card[card]);
445 continue;
446
447 tty = port->tty;
448
449
450 if (tty == NULL) {
451 unlock_card(&isi_card[card]);
452 continue;
453 }
454
455 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
456 if (txcount <= 0 || tty->stopped || tty->hw_stopped) {
457 unlock_card(&isi_card[card]);
458 continue;
459 }
460 if (!(inw(base + 0x02) & (1 << port->channel))) {
461 unlock_card(&isi_card[card]);
462 continue;
463 }
464 pr_dbg("txing %d bytes, port%d.\n", txcount,
465 port->channel + 1);
466 outw((port->channel << isi_card[card].shift_count) | txcount,
467 base);
468 residue = NO;
469 wrd = 0;
470 while (1) {
471 cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
472 - port->xmit_tail));
473 if (residue == YES) {
474 residue = NO;
475 if (cnt > 0) {
476 wrd |= (port->xmit_buf[port->xmit_tail]
477 << 8);
478 port->xmit_tail = (port->xmit_tail + 1)
479 & (SERIAL_XMIT_SIZE - 1);
480 port->xmit_cnt--;
481 txcount--;
482 cnt--;
483 outw(wrd, base);
484 } else {
485 outw(wrd, base);
486 break;
487 }
488 }
489 if (cnt <= 0) break;
490 word_count = cnt >> 1;
491 outsw(base, port->xmit_buf+port->xmit_tail,word_count);
492 port->xmit_tail = (port->xmit_tail
493 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
494 txcount -= (word_count << 1);
495 port->xmit_cnt -= (word_count << 1);
496 if (cnt & 0x0001) {
497 residue = YES;
498 wrd = port->xmit_buf[port->xmit_tail];
499 port->xmit_tail = (port->xmit_tail + 1)
500 & (SERIAL_XMIT_SIZE - 1);
501 port->xmit_cnt--;
502 txcount--;
503 }
504 }
505
506 InterruptTheCard(base);
507 if (port->xmit_cnt <= 0)
508 port->status &= ~ISI_TXOK;
509 if (port->xmit_cnt <= WAKEUP_CHARS)
510 schedule_work(&port->bh_tqueue);
511 unlock_card(&isi_card[card]);
512 }
513
514 /* schedule another tx for hopefully in about 10ms */
515 sched_again:
516 if (!re_schedule) {
517 re_schedule = 2;
518 return;
519 }
520
521 init_timer(&tx);
522 tx.expires = jiffies + HZ/100;
523 tx.data = 0;
524 tx.function = isicom_tx;
525 add_timer(&tx);
526
527 return;
528 }
529
530 /* Interrupt handlers */
531
532
533 static void isicom_bottomhalf(void *data)
534 {
535 struct isi_port *port = (struct isi_port *) data;
536 struct tty_struct *tty = port->tty;
537
538 if (!tty)
539 return;
540
541 tty_wakeup(tty);
542 wake_up_interruptible(&tty->write_wait);
543 }
544
545 /*
546 * Main interrupt handler routine
547 */
548
549 static irqreturn_t isicom_interrupt(int irq, void *dev_id)
550 {
551 struct isi_board *card = dev_id;
552 struct isi_port *port;
553 struct tty_struct *tty;
554 unsigned long base;
555 u16 header, word_count, count, channel;
556 short byte_count;
557 unsigned char *rp;
558
559 if (!card || !(card->status & FIRMWARE_LOADED))
560 return IRQ_NONE;
561
562 base = card->base;
563 spin_lock(&card->card_lock);
564
565 if (card->isa == NO) {
566 /*
567 * disable any interrupts from the PCI card and lower the
568 * interrupt line
569 */
570 outw(0x8000, base+0x04);
571 ClearInterrupt(base);
572 }
573
574 inw(base); /* get the dummy word out */
575 header = inw(base);
576 channel = (header & 0x7800) >> card->shift_count;
577 byte_count = header & 0xff;
578
579 if (channel + 1 > card->port_count) {
580 printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): "
581 "%d(channel) > port_count.\n", base, channel+1);
582 if (card->isa)
583 ClearInterrupt(base);
584 else
585 outw(0x0000, base+0x04); /* enable interrupts */
586 spin_unlock(&card->card_lock);
587 return IRQ_HANDLED;
588 }
589 port = card->ports + channel;
590 if (!(port->flags & ASYNC_INITIALIZED)) {
591 if (card->isa)
592 ClearInterrupt(base);
593 else
594 outw(0x0000, base+0x04); /* enable interrupts */
595 return IRQ_HANDLED;
596 }
597
598 tty = port->tty;
599 if (tty == NULL) {
600 word_count = byte_count >> 1;
601 while(byte_count > 1) {
602 inw(base);
603 byte_count -= 2;
604 }
605 if (byte_count & 0x01)
606 inw(base);
607 if (card->isa == YES)
608 ClearInterrupt(base);
609 else
610 outw(0x0000, base+0x04); /* enable interrupts */
611 spin_unlock(&card->card_lock);
612 return IRQ_HANDLED;
613 }
614
615 if (header & 0x8000) { /* Status Packet */
616 header = inw(base);
617 switch(header & 0xff) {
618 case 0: /* Change in EIA signals */
619 if (port->flags & ASYNC_CHECK_CD) {
620 if (port->status & ISI_DCD) {
621 if (!(header & ISI_DCD)) {
622 /* Carrier has been lost */
623 pr_dbg("interrupt: DCD->low.\n"
624 );
625 port->status &= ~ISI_DCD;
626 schedule_work(&port->hangup_tq);
627 }
628 } else if (header & ISI_DCD) {
629 /* Carrier has been detected */
630 pr_dbg("interrupt: DCD->high.\n");
631 port->status |= ISI_DCD;
632 wake_up_interruptible(&port->open_wait);
633 }
634 } else {
635 if (header & ISI_DCD)
636 port->status |= ISI_DCD;
637 else
638 port->status &= ~ISI_DCD;
639 }
640
641 if (port->flags & ASYNC_CTS_FLOW) {
642 if (port->tty->hw_stopped) {
643 if (header & ISI_CTS) {
644 port->tty->hw_stopped = 0;
645 /* start tx ing */
646 port->status |= (ISI_TXOK
647 | ISI_CTS);
648 schedule_work(&port->bh_tqueue);
649 }
650 } else if (!(header & ISI_CTS)) {
651 port->tty->hw_stopped = 1;
652 /* stop tx ing */
653 port->status &= ~(ISI_TXOK | ISI_CTS);
654 }
655 } else {
656 if (header & ISI_CTS)
657 port->status |= ISI_CTS;
658 else
659 port->status &= ~ISI_CTS;
660 }
661
662 if (header & ISI_DSR)
663 port->status |= ISI_DSR;
664 else
665 port->status &= ~ISI_DSR;
666
667 if (header & ISI_RI)
668 port->status |= ISI_RI;
669 else
670 port->status &= ~ISI_RI;
671
672 break;
673
674 case 1: /* Received Break !!! */
675 tty_insert_flip_char(tty, 0, TTY_BREAK);
676 if (port->flags & ASYNC_SAK)
677 do_SAK(tty);
678 tty_flip_buffer_push(tty);
679 break;
680
681 case 2: /* Statistics */
682 pr_dbg("isicom_interrupt: stats!!!.\n");
683 break;
684
685 default:
686 pr_dbg("Intr: Unknown code in status packet.\n");
687 break;
688 }
689 } else { /* Data Packet */
690
691 count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
692 pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count);
693 word_count = count >> 1;
694 insw(base, rp, word_count);
695 byte_count -= (word_count << 1);
696 if (count & 0x0001) {
697 tty_insert_flip_char(tty, inw(base) & 0xff,
698 TTY_NORMAL);
699 byte_count -= 2;
700 }
701 if (byte_count > 0) {
702 pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping "
703 "bytes...\n", base, channel + 1);
704 while(byte_count > 0) { /* drain out unread xtra data */
705 inw(base);
706 byte_count -= 2;
707 }
708 }
709 tty_flip_buffer_push(tty);
710 }
711 if (card->isa == YES)
712 ClearInterrupt(base);
713 else
714 outw(0x0000, base+0x04); /* enable interrupts */
715
716 return IRQ_HANDLED;
717 }
718
719 static void isicom_config_port(struct isi_port *port)
720 {
721 struct isi_board *card = port->card;
722 struct tty_struct *tty;
723 unsigned long baud;
724 unsigned long base = card->base;
725 u16 channel_setup, channel = port->channel,
726 shift_count = card->shift_count;
727 unsigned char flow_ctrl;
728
729 if (!(tty = port->tty) || !tty->termios)
730 return;
731 baud = C_BAUD(tty);
732 if (baud & CBAUDEX) {
733 baud &= ~CBAUDEX;
734
735 /* if CBAUDEX bit is on and the baud is set to either 50 or 75
736 * then the card is programmed for 57.6Kbps or 115Kbps
737 * respectively.
738 */
739
740 if (baud < 1 || baud > 2)
741 port->tty->termios->c_cflag &= ~CBAUDEX;
742 else
743 baud += 15;
744 }
745 if (baud == 15) {
746
747 /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
748 * by the set_serial_info ioctl ... this is done by
749 * the 'setserial' utility.
750 */
751
752 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
753 baud++; /* 57.6 Kbps */
754 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
755 baud +=2; /* 115 Kbps */
756 }
757 if (linuxb_to_isib[baud] == -1) {
758 /* hang up */
759 drop_dtr(port);
760 return;
761 }
762 else
763 raise_dtr(port);
764
765 if (lock_card(card)) {
766 outw(0x8000 | (channel << shift_count) |0x03, base);
767 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
768 channel_setup = 0;
769 switch(C_CSIZE(tty)) {
770 case CS5:
771 channel_setup |= ISICOM_CS5;
772 break;
773 case CS6:
774 channel_setup |= ISICOM_CS6;
775 break;
776 case CS7:
777 channel_setup |= ISICOM_CS7;
778 break;
779 case CS8:
780 channel_setup |= ISICOM_CS8;
781 break;
782 }
783
784 if (C_CSTOPB(tty))
785 channel_setup |= ISICOM_2SB;
786 if (C_PARENB(tty)) {
787 channel_setup |= ISICOM_EVPAR;
788 if (C_PARODD(tty))
789 channel_setup |= ISICOM_ODPAR;
790 }
791 outw(channel_setup, base);
792 InterruptTheCard(base);
793 unlock_card(card);
794 }
795 if (C_CLOCAL(tty))
796 port->flags &= ~ASYNC_CHECK_CD;
797 else
798 port->flags |= ASYNC_CHECK_CD;
799
800 /* flow control settings ...*/
801 flow_ctrl = 0;
802 port->flags &= ~ASYNC_CTS_FLOW;
803 if (C_CRTSCTS(tty)) {
804 port->flags |= ASYNC_CTS_FLOW;
805 flow_ctrl |= ISICOM_CTSRTS;
806 }
807 if (I_IXON(tty))
808 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
809 if (I_IXOFF(tty))
810 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
811
812 if (lock_card(card)) {
813 outw(0x8000 | (channel << shift_count) |0x04, base);
814 outw(flow_ctrl << 8 | 0x05, base);
815 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
816 InterruptTheCard(base);
817 unlock_card(card);
818 }
819
820 /* rx enabled -> enable port for rx on the card */
821 if (C_CREAD(tty)) {
822 card->port_status |= (1 << channel);
823 outw(card->port_status, base + 0x02);
824 }
825 }
826
827 /* open et all */
828
829 static inline void isicom_setup_board(struct isi_board *bp)
830 {
831 int channel;
832 struct isi_port *port;
833 unsigned long flags;
834
835 spin_lock_irqsave(&bp->card_lock, flags);
836 if (bp->status & BOARD_ACTIVE) {
837 spin_unlock_irqrestore(&bp->card_lock, flags);
838 return;
839 }
840 port = bp->ports;
841 bp->status |= BOARD_ACTIVE;
842 spin_unlock_irqrestore(&bp->card_lock, flags);
843 for (channel = 0; channel < bp->port_count; channel++, port++)
844 drop_dtr_rts(port);
845 return;
846 }
847
848 static int isicom_setup_port(struct isi_port *port)
849 {
850 struct isi_board *card = port->card;
851 unsigned long flags;
852
853 if (port->flags & ASYNC_INITIALIZED) {
854 return 0;
855 }
856 if (!port->xmit_buf) {
857 unsigned long page;
858
859 if (!(page = get_zeroed_page(GFP_KERNEL)))
860 return -ENOMEM;
861
862 if (port->xmit_buf) {
863 free_page(page);
864 return -ERESTARTSYS;
865 }
866 port->xmit_buf = (unsigned char *) page;
867 }
868
869 spin_lock_irqsave(&card->card_lock, flags);
870 if (port->tty)
871 clear_bit(TTY_IO_ERROR, &port->tty->flags);
872 if (port->count == 1)
873 card->count++;
874
875 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
876
877 /* discard any residual data */
878 kill_queue(port, ISICOM_KILLTX | ISICOM_KILLRX);
879
880 isicom_config_port(port);
881 port->flags |= ASYNC_INITIALIZED;
882 spin_unlock_irqrestore(&card->card_lock, flags);
883
884 return 0;
885 }
886
887 static int block_til_ready(struct tty_struct *tty, struct file *filp,
888 struct isi_port *port)
889 {
890 struct isi_board *card = port->card;
891 int do_clocal = 0, retval;
892 unsigned long flags;
893 DECLARE_WAITQUEUE(wait, current);
894
895 /* block if port is in the process of being closed */
896
897 if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
898 pr_dbg("block_til_ready: close in progress.\n");
899 interruptible_sleep_on(&port->close_wait);
900 if (port->flags & ASYNC_HUP_NOTIFY)
901 return -EAGAIN;
902 else
903 return -ERESTARTSYS;
904 }
905
906 /* if non-blocking mode is set ... */
907
908 if ((filp->f_flags & O_NONBLOCK) ||
909 (tty->flags & (1 << TTY_IO_ERROR))) {
910 pr_dbg("block_til_ready: non-block mode.\n");
911 port->flags |= ASYNC_NORMAL_ACTIVE;
912 return 0;
913 }
914
915 if (C_CLOCAL(tty))
916 do_clocal = 1;
917
918 /* block waiting for DCD to be asserted, and while
919 callout dev is busy */
920 retval = 0;
921 add_wait_queue(&port->open_wait, &wait);
922
923 spin_lock_irqsave(&card->card_lock, flags);
924 if (!tty_hung_up_p(filp))
925 port->count--;
926 port->blocked_open++;
927 spin_unlock_irqrestore(&card->card_lock, flags);
928
929 while (1) {
930 raise_dtr_rts(port);
931
932 set_current_state(TASK_INTERRUPTIBLE);
933 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
934 if (port->flags & ASYNC_HUP_NOTIFY)
935 retval = -EAGAIN;
936 else
937 retval = -ERESTARTSYS;
938 break;
939 }
940 if (!(port->flags & ASYNC_CLOSING) &&
941 (do_clocal || (port->status & ISI_DCD))) {
942 break;
943 }
944 if (signal_pending(current)) {
945 retval = -ERESTARTSYS;
946 break;
947 }
948 schedule();
949 }
950 set_current_state(TASK_RUNNING);
951 remove_wait_queue(&port->open_wait, &wait);
952 spin_lock_irqsave(&card->card_lock, flags);
953 if (!tty_hung_up_p(filp))
954 port->count++;
955 port->blocked_open--;
956 spin_unlock_irqrestore(&card->card_lock, flags);
957 if (retval)
958 return retval;
959 port->flags |= ASYNC_NORMAL_ACTIVE;
960 return 0;
961 }
962
963 static int isicom_open(struct tty_struct *tty, struct file *filp)
964 {
965 struct isi_port *port;
966 struct isi_board *card;
967 unsigned int line, board;
968 int error;
969
970 line = tty->index;
971 if (line < 0 || line > PORT_COUNT-1)
972 return -ENODEV;
973 board = BOARD(line);
974 card = &isi_card[board];
975
976 if (!(card->status & FIRMWARE_LOADED))
977 return -ENODEV;
978
979 /* open on a port greater than the port count for the card !!! */
980 if (line > ((board * 16) + card->port_count - 1))
981 return -ENODEV;
982
983 port = &isi_ports[line];
984 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
985 return -ENODEV;
986
987 isicom_setup_board(card);
988
989 port->count++;
990 tty->driver_data = port;
991 port->tty = tty;
992 if ((error = isicom_setup_port(port))!=0)
993 return error;
994 if ((error = block_til_ready(tty, filp, port))!=0)
995 return error;
996
997 return 0;
998 }
999
1000 /* close et all */
1001
1002 static inline void isicom_shutdown_board(struct isi_board *bp)
1003 {
1004 unsigned long flags;
1005
1006 spin_lock_irqsave(&bp->card_lock, flags);
1007 if (bp->status & BOARD_ACTIVE) {
1008 bp->status &= ~BOARD_ACTIVE;
1009 }
1010 spin_unlock_irqrestore(&bp->card_lock, flags);
1011 }
1012
1013 static void isicom_shutdown_port(struct isi_port *port)
1014 {
1015 struct isi_board *card = port->card;
1016 struct tty_struct *tty;
1017 unsigned long flags;
1018
1019 tty = port->tty;
1020
1021 spin_lock_irqsave(&card->card_lock, flags);
1022 if (!(port->flags & ASYNC_INITIALIZED)) {
1023 spin_unlock_irqrestore(&card->card_lock, flags);
1024 return;
1025 }
1026 if (port->xmit_buf) {
1027 free_page((unsigned long) port->xmit_buf);
1028 port->xmit_buf = NULL;
1029 }
1030 port->flags &= ~ASYNC_INITIALIZED;
1031 /* 3rd October 2000 : Vinayak P Risbud */
1032 port->tty = NULL;
1033 spin_unlock_irqrestore(&card->card_lock, flags);
1034
1035 /*Fix done by Anil .S on 30-04-2001
1036 remote login through isi port has dtr toggle problem
1037 due to which the carrier drops before the password prompt
1038 appears on the remote end. Now we drop the dtr only if the
1039 HUPCL(Hangup on close) flag is set for the tty*/
1040
1041 if (C_HUPCL(tty))
1042 /* drop dtr on this port */
1043 drop_dtr(port);
1044
1045 /* any other port uninits */
1046 if (tty)
1047 set_bit(TTY_IO_ERROR, &tty->flags);
1048
1049 if (--card->count < 0) {
1050 pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n",
1051 card->base, card->count);
1052 card->count = 0;
1053 }
1054
1055 /* last port was closed, shutdown that boad too */
1056 if (C_HUPCL(tty)) {
1057 if (!card->count)
1058 isicom_shutdown_board(card);
1059 }
1060 }
1061
1062 static void isicom_close(struct tty_struct *tty, struct file *filp)
1063 {
1064 struct isi_port *port = tty->driver_data;
1065 struct isi_board *card = port->card;
1066 unsigned long flags;
1067
1068 if (!port)
1069 return;
1070 if (isicom_paranoia_check(port, tty->name, "isicom_close"))
1071 return;
1072
1073 pr_dbg("Close start!!!.\n");
1074
1075 spin_lock_irqsave(&card->card_lock, flags);
1076 if (tty_hung_up_p(filp)) {
1077 spin_unlock_irqrestore(&card->card_lock, flags);
1078 return;
1079 }
1080
1081 if (tty->count == 1 && port->count != 1) {
1082 printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
1083 "count tty->count = 1 port count = %d.\n",
1084 card->base, port->count);
1085 port->count = 1;
1086 }
1087 if (--port->count < 0) {
1088 printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
1089 "count for channel%d = %d", card->base, port->channel,
1090 port->count);
1091 port->count = 0;
1092 }
1093
1094 if (port->count) {
1095 spin_unlock_irqrestore(&card->card_lock, flags);
1096 return;
1097 }
1098 port->flags |= ASYNC_CLOSING;
1099 tty->closing = 1;
1100 spin_unlock_irqrestore(&card->card_lock, flags);
1101
1102 if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1103 tty_wait_until_sent(tty, port->closing_wait);
1104 /* indicate to the card that no more data can be received
1105 on this port */
1106 spin_lock_irqsave(&card->card_lock, flags);
1107 if (port->flags & ASYNC_INITIALIZED) {
1108 card->port_status &= ~(1 << port->channel);
1109 outw(card->port_status, card->base + 0x02);
1110 }
1111 isicom_shutdown_port(port);
1112 spin_unlock_irqrestore(&card->card_lock, flags);
1113
1114 if (tty->driver->flush_buffer)
1115 tty->driver->flush_buffer(tty);
1116 tty_ldisc_flush(tty);
1117
1118 spin_lock_irqsave(&card->card_lock, flags);
1119 tty->closing = 0;
1120
1121 if (port->blocked_open) {
1122 spin_unlock_irqrestore(&card->card_lock, flags);
1123 if (port->close_delay) {
1124 pr_dbg("scheduling until time out.\n");
1125 msleep_interruptible(
1126 jiffies_to_msecs(port->close_delay));
1127 }
1128 spin_lock_irqsave(&card->card_lock, flags);
1129 wake_up_interruptible(&port->open_wait);
1130 }
1131 port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1132 wake_up_interruptible(&port->close_wait);
1133 spin_unlock_irqrestore(&card->card_lock, flags);
1134 }
1135
1136 /* write et all */
1137 static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
1138 int count)
1139 {
1140 struct isi_port *port = tty->driver_data;
1141 struct isi_board *card = port->card;
1142 unsigned long flags;
1143 int cnt, total = 0;
1144
1145 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
1146 return 0;
1147
1148 if (!port->xmit_buf)
1149 return 0;
1150
1151 spin_lock_irqsave(&card->card_lock, flags);
1152
1153 while(1) {
1154 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
1155 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
1156 if (cnt <= 0)
1157 break;
1158
1159 memcpy(port->xmit_buf + port->xmit_head, buf, cnt);
1160 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
1161 - 1);
1162 port->xmit_cnt += cnt;
1163 buf += cnt;
1164 count -= cnt;
1165 total += cnt;
1166 }
1167 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
1168 port->status |= ISI_TXOK;
1169 spin_unlock_irqrestore(&card->card_lock, flags);
1170 return total;
1171 }
1172
1173 /* put_char et all */
1174 static void isicom_put_char(struct tty_struct *tty, unsigned char ch)
1175 {
1176 struct isi_port *port = tty->driver_data;
1177 struct isi_board *card = port->card;
1178 unsigned long flags;
1179
1180 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
1181 return;
1182
1183 if (!port->xmit_buf)
1184 return;
1185
1186 spin_lock_irqsave(&card->card_lock, flags);
1187 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
1188 spin_unlock_irqrestore(&card->card_lock, flags);
1189 return;
1190 }
1191
1192 port->xmit_buf[port->xmit_head++] = ch;
1193 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
1194 port->xmit_cnt++;
1195 spin_unlock_irqrestore(&card->card_lock, flags);
1196 }
1197
1198 /* flush_chars et all */
1199 static void isicom_flush_chars(struct tty_struct *tty)
1200 {
1201 struct isi_port *port = tty->driver_data;
1202
1203 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1204 return;
1205
1206 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1207 !port->xmit_buf)
1208 return;
1209
1210 /* this tells the transmitter to consider this port for
1211 data output to the card ... that's the best we can do. */
1212 port->status |= ISI_TXOK;
1213 }
1214
1215 /* write_room et all */
1216 static int isicom_write_room(struct tty_struct *tty)
1217 {
1218 struct isi_port *port = tty->driver_data;
1219 int free;
1220
1221 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1222 return 0;
1223
1224 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1225 if (free < 0)
1226 free = 0;
1227 return free;
1228 }
1229
1230 /* chars_in_buffer et all */
1231 static int isicom_chars_in_buffer(struct tty_struct *tty)
1232 {
1233 struct isi_port *port = tty->driver_data;
1234 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1235 return 0;
1236 return port->xmit_cnt;
1237 }
1238
1239 /* ioctl et all */
1240 static inline void isicom_send_break(struct isi_port *port,
1241 unsigned long length)
1242 {
1243 struct isi_board *card = port->card;
1244 unsigned long base = card->base;
1245
1246 if (!lock_card(card))
1247 return;
1248
1249 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1250 outw((length & 0xff) << 8 | 0x00, base);
1251 outw((length & 0xff00), base);
1252 InterruptTheCard(base);
1253
1254 unlock_card(card);
1255 }
1256
1257 static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
1258 {
1259 struct isi_port *port = tty->driver_data;
1260 /* just send the port status */
1261 u16 status = port->status;
1262
1263 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1264 return -ENODEV;
1265
1266 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1267 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1268 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1269 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1270 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1271 ((status & ISI_RI ) ? TIOCM_RI : 0);
1272 }
1273
1274 static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
1275 unsigned int set, unsigned int clear)
1276 {
1277 struct isi_port *port = tty->driver_data;
1278
1279 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1280 return -ENODEV;
1281
1282 if (set & TIOCM_RTS)
1283 raise_rts(port);
1284 if (set & TIOCM_DTR)
1285 raise_dtr(port);
1286
1287 if (clear & TIOCM_RTS)
1288 drop_rts(port);
1289 if (clear & TIOCM_DTR)
1290 drop_dtr(port);
1291
1292 return 0;
1293 }
1294
1295 static int isicom_set_serial_info(struct isi_port *port,
1296 struct serial_struct __user *info)
1297 {
1298 struct serial_struct newinfo;
1299 int reconfig_port;
1300
1301 if (copy_from_user(&newinfo, info, sizeof(newinfo)))
1302 return -EFAULT;
1303
1304 reconfig_port = ((port->flags & ASYNC_SPD_MASK) !=
1305 (newinfo.flags & ASYNC_SPD_MASK));
1306
1307 if (!capable(CAP_SYS_ADMIN)) {
1308 if ((newinfo.close_delay != port->close_delay) ||
1309 (newinfo.closing_wait != port->closing_wait) ||
1310 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1311 (port->flags & ~ASYNC_USR_MASK)))
1312 return -EPERM;
1313 port->flags = ((port->flags & ~ ASYNC_USR_MASK) |
1314 (newinfo.flags & ASYNC_USR_MASK));
1315 }
1316 else {
1317 port->close_delay = newinfo.close_delay;
1318 port->closing_wait = newinfo.closing_wait;
1319 port->flags = ((port->flags & ~ASYNC_FLAGS) |
1320 (newinfo.flags & ASYNC_FLAGS));
1321 }
1322 if (reconfig_port) {
1323 isicom_config_port(port);
1324 }
1325 return 0;
1326 }
1327
1328 static int isicom_get_serial_info(struct isi_port *port,
1329 struct serial_struct __user *info)
1330 {
1331 struct serial_struct out_info;
1332
1333 memset(&out_info, 0, sizeof(out_info));
1334 /* out_info.type = ? */
1335 out_info.line = port - isi_ports;
1336 out_info.port = port->card->base;
1337 out_info.irq = port->card->irq;
1338 out_info.flags = port->flags;
1339 /* out_info.baud_base = ? */
1340 out_info.close_delay = port->close_delay;
1341 out_info.closing_wait = port->closing_wait;
1342 if (copy_to_user(info, &out_info, sizeof(out_info)))
1343 return -EFAULT;
1344 return 0;
1345 }
1346
1347 static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
1348 unsigned int cmd, unsigned long arg)
1349 {
1350 struct isi_port *port = tty->driver_data;
1351 void __user *argp = (void __user *)arg;
1352 int retval;
1353
1354 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1355 return -ENODEV;
1356
1357 switch(cmd) {
1358 case TCSBRK:
1359 retval = tty_check_change(tty);
1360 if (retval)
1361 return retval;
1362 tty_wait_until_sent(tty, 0);
1363 if (!arg)
1364 isicom_send_break(port, HZ/4);
1365 return 0;
1366
1367 case TCSBRKP:
1368 retval = tty_check_change(tty);
1369 if (retval)
1370 return retval;
1371 tty_wait_until_sent(tty, 0);
1372 isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4);
1373 return 0;
1374
1375 case TIOCGSOFTCAR:
1376 return put_user(C_CLOCAL(tty) ? 1 : 0,
1377 (unsigned long __user *)argp);
1378
1379 case TIOCSSOFTCAR:
1380 if (get_user(arg, (unsigned long __user *) argp))
1381 return -EFAULT;
1382 tty->termios->c_cflag =
1383 ((tty->termios->c_cflag & ~CLOCAL) |
1384 (arg ? CLOCAL : 0));
1385 return 0;
1386
1387 case TIOCGSERIAL:
1388 return isicom_get_serial_info(port, argp);
1389
1390 case TIOCSSERIAL:
1391 return isicom_set_serial_info(port, argp);
1392
1393 default:
1394 return -ENOIOCTLCMD;
1395 }
1396 return 0;
1397 }
1398
1399 /* set_termios et all */
1400 static void isicom_set_termios(struct tty_struct *tty,
1401 struct termios *old_termios)
1402 {
1403 struct isi_port *port = tty->driver_data;
1404
1405 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1406 return;
1407
1408 if (tty->termios->c_cflag == old_termios->c_cflag &&
1409 tty->termios->c_iflag == old_termios->c_iflag)
1410 return;
1411
1412 isicom_config_port(port);
1413
1414 if ((old_termios->c_cflag & CRTSCTS) &&
1415 !(tty->termios->c_cflag & CRTSCTS)) {
1416 tty->hw_stopped = 0;
1417 isicom_start(tty);
1418 }
1419 }
1420
1421 /* throttle et all */
1422 static void isicom_throttle(struct tty_struct *tty)
1423 {
1424 struct isi_port *port = tty->driver_data;
1425 struct isi_board *card = port->card;
1426
1427 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1428 return;
1429
1430 /* tell the card that this port cannot handle any more data for now */
1431 card->port_status &= ~(1 << port->channel);
1432 outw(card->port_status, card->base + 0x02);
1433 }
1434
1435 /* unthrottle et all */
1436 static void isicom_unthrottle(struct tty_struct *tty)
1437 {
1438 struct isi_port *port = tty->driver_data;
1439 struct isi_board *card = port->card;
1440
1441 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1442 return;
1443
1444 /* tell the card that this port is ready to accept more data */
1445 card->port_status |= (1 << port->channel);
1446 outw(card->port_status, card->base + 0x02);
1447 }
1448
1449 /* stop et all */
1450 static void isicom_stop(struct tty_struct *tty)
1451 {
1452 struct isi_port *port = tty->driver_data;
1453
1454 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1455 return;
1456
1457 /* this tells the transmitter not to consider this port for
1458 data output to the card. */
1459 port->status &= ~ISI_TXOK;
1460 }
1461
1462 /* start et all */
1463 static void isicom_start(struct tty_struct *tty)
1464 {
1465 struct isi_port *port = tty->driver_data;
1466
1467 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1468 return;
1469
1470 /* this tells the transmitter to consider this port for
1471 data output to the card. */
1472 port->status |= ISI_TXOK;
1473 }
1474
1475 /* hangup et all */
1476 static void do_isicom_hangup(void *data)
1477 {
1478 struct isi_port *port = data;
1479 struct tty_struct *tty;
1480
1481 tty = port->tty;
1482 if (tty)
1483 tty_hangup(tty);
1484 }
1485
1486 static void isicom_hangup(struct tty_struct *tty)
1487 {
1488 struct isi_port *port = tty->driver_data;
1489
1490 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1491 return;
1492
1493 isicom_shutdown_port(port);
1494 port->count = 0;
1495 port->flags &= ~ASYNC_NORMAL_ACTIVE;
1496 port->tty = NULL;
1497 wake_up_interruptible(&port->open_wait);
1498 }
1499
1500 /* flush_buffer et all */
1501 static void isicom_flush_buffer(struct tty_struct *tty)
1502 {
1503 struct isi_port *port = tty->driver_data;
1504 struct isi_board *card = port->card;
1505 unsigned long flags;
1506
1507 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
1508 return;
1509
1510 spin_lock_irqsave(&card->card_lock, flags);
1511 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1512 spin_unlock_irqrestore(&card->card_lock, flags);
1513
1514 wake_up_interruptible(&tty->write_wait);
1515 tty_wakeup(tty);
1516 }
1517
1518 /*
1519 * Driver init and deinit functions
1520 */
1521
1522 static int __devinit isicom_register_ioregion(struct pci_dev *pdev,
1523 const unsigned int index)
1524 {
1525 struct isi_board *board = pci_get_drvdata(pdev);
1526
1527 if (!board->base)
1528 return -EINVAL;
1529
1530 if (!request_region(board->base, 16, ISICOM_NAME)) {
1531 dev_dbg(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1532 "will be disabled.\n", board->base, board->base + 15,
1533 index + 1);
1534 return -EBUSY;
1535 }
1536
1537 return 0;
1538 }
1539
1540 static void isicom_unregister_ioregion(struct pci_dev *pdev)
1541 {
1542 struct isi_board *board = pci_get_drvdata(pdev);
1543
1544 if (!board->base)
1545 return;
1546
1547 release_region(board->base, 16);
1548 dev_dbg(&pdev->dev, "I/O Region 0x%lx-0x%lx released.\n",
1549 board->base, board->base + 15);
1550 board->base = 0;
1551 }
1552
1553 static const struct tty_operations isicom_ops = {
1554 .open = isicom_open,
1555 .close = isicom_close,
1556 .write = isicom_write,
1557 .put_char = isicom_put_char,
1558 .flush_chars = isicom_flush_chars,
1559 .write_room = isicom_write_room,
1560 .chars_in_buffer = isicom_chars_in_buffer,
1561 .ioctl = isicom_ioctl,
1562 .set_termios = isicom_set_termios,
1563 .throttle = isicom_throttle,
1564 .unthrottle = isicom_unthrottle,
1565 .stop = isicom_stop,
1566 .start = isicom_start,
1567 .hangup = isicom_hangup,
1568 .flush_buffer = isicom_flush_buffer,
1569 .tiocmget = isicom_tiocmget,
1570 .tiocmset = isicom_tiocmset,
1571 };
1572
1573 static int __devinit isicom_register_tty_driver(void)
1574 {
1575 int error = -ENOMEM;
1576
1577 /* tty driver structure initialization */
1578 isicom_normal = alloc_tty_driver(PORT_COUNT);
1579 if (!isicom_normal)
1580 goto end;
1581
1582 isicom_normal->owner = THIS_MODULE;
1583 isicom_normal->name = "ttyM";
1584 isicom_normal->major = ISICOM_NMAJOR;
1585 isicom_normal->minor_start = 0;
1586 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1587 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1588 isicom_normal->init_termios = tty_std_termios;
1589 isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
1590 CLOCAL;
1591 isicom_normal->flags = TTY_DRIVER_REAL_RAW;
1592 tty_set_operations(isicom_normal, &isicom_ops);
1593
1594 if ((error = tty_register_driver(isicom_normal))) {
1595 pr_dbg("Couldn't register the dialin driver, error=%d\n",
1596 error);
1597 put_tty_driver(isicom_normal);
1598 }
1599 end:
1600 return error;
1601 }
1602
1603 static void isicom_unregister_tty_driver(void)
1604 {
1605 int error;
1606
1607 if ((error = tty_unregister_driver(isicom_normal)))
1608 pr_dbg("couldn't unregister normal driver, error=%d.\n", error);
1609
1610 put_tty_driver(isicom_normal);
1611 }
1612
1613 static int __devinit isicom_register_isr(struct pci_dev *pdev,
1614 const unsigned int index)
1615 {
1616 struct isi_board *board = pci_get_drvdata(pdev);
1617 unsigned long irqflags = IRQF_DISABLED;
1618 int retval = -EINVAL;
1619
1620 if (!board->base)
1621 goto end;
1622
1623 if (board->isa == NO)
1624 irqflags |= IRQF_SHARED;
1625
1626 retval = request_irq(board->irq, isicom_interrupt, irqflags,
1627 ISICOM_NAME, board);
1628 if (retval < 0)
1629 dev_warn(&pdev->dev, "Could not install handler at Irq %d. "
1630 "Card%d will be disabled.\n", board->irq, index + 1);
1631 else
1632 retval = 0;
1633 end:
1634 return retval;
1635 }
1636
1637 static int __devinit reset_card(struct pci_dev *pdev,
1638 const unsigned int card, unsigned int *signature)
1639 {
1640 struct isi_board *board = pci_get_drvdata(pdev);
1641 unsigned long base = board->base;
1642 unsigned int portcount = 0;
1643 int retval = 0;
1644
1645 dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1646 base);
1647
1648 inw(base + 0x8);
1649
1650 mdelay(10);
1651
1652 outw(0, base + 0x8); /* Reset */
1653
1654 msleep(3000);
1655
1656 *signature = inw(base + 0x4) & 0xff;
1657
1658 if (board->isa == YES) {
1659 if (!(inw(base + 0xe) & 0x1) || (inw(base + 0x2))) {
1660 dev_dbg(&pdev->dev, "base+0x2=0x%lx, base+0xe=0x%lx\n",
1661 inw(base + 0x2), inw(base + 0xe));
1662 dev_err(&pdev->dev, "ISILoad:ISA Card%d reset failure "
1663 "(Possible bad I/O Port Address 0x%lx).\n",
1664 card + 1, base);
1665 retval = -EIO;
1666 goto end;
1667 }
1668 } else {
1669 portcount = inw(base + 0x2);
1670 if (!(inw(base + 0xe) & 0x1) || ((portcount != 0) &&
1671 (portcount != 4) && (portcount != 8))) {
1672 dev_dbg(&pdev->dev, "base+0x2=0x%lx, base+0xe=0x%lx\n",
1673 inw(base + 0x2), inw(base + 0xe));
1674 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure "
1675 "(Possible bad I/O Port Address 0x%lx).\n",
1676 card + 1, base);
1677 retval = -EIO;
1678 goto end;
1679 }
1680 }
1681
1682 switch (*signature) {
1683 case 0xa5:
1684 case 0xbb:
1685 case 0xdd:
1686 board->port_count = (board->isa == NO && portcount == 4) ? 4 :
1687 8;
1688 board->shift_count = 12;
1689 break;
1690 case 0xcc:
1691 board->port_count = 16;
1692 board->shift_count = 11;
1693 break;
1694 default:
1695 dev_warn(&pdev->dev, "ISILoad:Card%d reset failure (Possible "
1696 "bad I/O Port Address 0x%lx).\n", card + 1, base);
1697 dev_dbg(&pdev->dev, "Sig=0x%lx\n", signature);
1698 retval = -EIO;
1699 }
1700 dev_info(&pdev->dev, "-Done\n");
1701
1702 end:
1703 return retval;
1704 }
1705
1706 static inline int WaitTillCardIsFree(u16 base)
1707 {
1708 unsigned long count = 0;
1709
1710 while (!(inw(base + 0xe) & 0x1) && count++ < 100)
1711 msleep(5);
1712
1713 return !(inw(base + 0xe) & 0x1);
1714 }
1715
1716 static int __devinit load_firmware(struct pci_dev *pdev,
1717 const unsigned int index, const unsigned int signature)
1718 {
1719 struct isi_board *board = pci_get_drvdata(pdev);
1720 const struct firmware *fw;
1721 unsigned long base = board->base;
1722 unsigned int a;
1723 u16 word_count, status;
1724 int retval = -EIO;
1725 char *name;
1726 u8 *data;
1727
1728 struct stframe {
1729 u16 addr;
1730 u16 count;
1731 u8 data[0];
1732 } *frame;
1733
1734 switch (signature) {
1735 case 0xa5:
1736 name = "isi608.bin";
1737 break;
1738 case 0xbb:
1739 name = "isi608em.bin";
1740 break;
1741 case 0xcc:
1742 name = "isi616em.bin";
1743 break;
1744 case 0xdd:
1745 name = "isi4608.bin";
1746 break;
1747 case 0xee:
1748 name = "isi4616.bin";
1749 break;
1750 default:
1751 dev_err(&pdev->dev, "Unknown signature.\n");
1752 goto end;
1753 }
1754
1755 retval = request_firmware(&fw, name, &pdev->dev);
1756 if (retval)
1757 goto end;
1758
1759 retval = -EIO;
1760
1761 for (frame = (struct stframe *)fw->data;
1762 frame < (struct stframe *)(fw->data + fw->size);
1763 frame = (struct stframe *)((u8 *)(frame + 1) +
1764 frame->count)) {
1765 if (WaitTillCardIsFree(base))
1766 goto errrelfw;
1767
1768 outw(0xf0, base); /* start upload sequence */
1769 outw(0x00, base);
1770 outw(frame->addr, base); /* lsb of address */
1771
1772 word_count = frame->count / 2 + frame->count % 2;
1773 outw(word_count, base);
1774 InterruptTheCard(base);
1775
1776 udelay(100); /* 0x2f */
1777
1778 if (WaitTillCardIsFree(base))
1779 goto errrelfw;
1780
1781 if ((status = inw(base + 0x4)) != 0) {
1782 dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1783 "Address:0x%x\nCount:0x%x\nStatus:0x%x\n",
1784 index + 1, frame->addr, frame->count, status);
1785 goto errrelfw;
1786 }
1787 outsw(base, frame->data, word_count);
1788
1789 InterruptTheCard(base);
1790
1791 udelay(50); /* 0x0f */
1792
1793 if (WaitTillCardIsFree(base))
1794 goto errrelfw;
1795
1796 if ((status = inw(base + 0x4)) != 0) {
1797 dev_err(&pdev->dev, "Card%d got out of sync.Card "
1798 "Status:0x%x\n", index + 1, status);
1799 goto errrelfw;
1800 }
1801 }
1802
1803 /* XXX: should we test it by reading it back and comparing with original like
1804 * in load firmware package? */
1805 for (frame = (struct stframe *)fw->data;
1806 frame < (struct stframe *)(fw->data + fw->size);
1807 frame = (struct stframe *)((u8 *)(frame + 1) +
1808 frame->count)) {
1809 if (WaitTillCardIsFree(base))
1810 goto errrelfw;
1811
1812 outw(0xf1, base); /* start download sequence */
1813 outw(0x00, base);
1814 outw(frame->addr, base); /* lsb of address */
1815
1816 word_count = (frame->count >> 1) + frame->count % 2;
1817 outw(word_count + 1, base);
1818 InterruptTheCard(base);
1819
1820 udelay(50); /* 0xf */
1821
1822 if (WaitTillCardIsFree(base))
1823 goto errrelfw;
1824
1825 if ((status = inw(base + 0x4)) != 0) {
1826 dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1827 "Address:0x%x\nCount:0x%x\nStatus: 0x%x\n",
1828 index + 1, frame->addr, frame->count, status);
1829 goto errrelfw;
1830 }
1831
1832 data = kmalloc(word_count * 2, GFP_KERNEL);
1833 inw(base);
1834 insw(base, data, word_count);
1835 InterruptTheCard(base);
1836
1837 for (a = 0; a < frame->count; a++)
1838 if (data[a] != frame->data[a]) {
1839 kfree(data);
1840 dev_err(&pdev->dev, "Card%d, firmware upload "
1841 "failed\n", index + 1);
1842 goto errrelfw;
1843 }
1844 kfree(data);
1845
1846 udelay(50); /* 0xf */
1847
1848 if (WaitTillCardIsFree(base))
1849 goto errrelfw;
1850
1851 if ((status = inw(base + 0x4)) != 0) {
1852 dev_err(&pdev->dev, "Card%d verify got out of sync. "
1853 "Card Status:0x%x\n", index + 1, status);
1854 goto errrelfw;
1855 }
1856 }
1857
1858 /* xfer ctrl */
1859 if (WaitTillCardIsFree(base))
1860 goto errrelfw;
1861
1862 outw(0xf2, base);
1863 outw(0x800, base);
1864 outw(0x0, base);
1865 outw(0x0, base);
1866 InterruptTheCard(base);
1867 outw(0x0, base + 0x4); /* for ISI4608 cards */
1868
1869 board->status |= FIRMWARE_LOADED;
1870 retval = 0;
1871
1872 errrelfw:
1873 release_firmware(fw);
1874 end:
1875 return retval;
1876 }
1877
1878 /*
1879 * Insmod can set static symbols so keep these static
1880 */
1881 static int io[4];
1882 static int irq[4];
1883 static int card;
1884
1885 static int __devinit isicom_probe(struct pci_dev *pdev,
1886 const struct pci_device_id *ent)
1887 {
1888 unsigned int ioaddr, signature, index;
1889 int retval = -EPERM;
1890 u8 pciirq;
1891 struct isi_board *board = NULL;
1892
1893 if (card >= BOARD_COUNT)
1894 goto err;
1895
1896 ioaddr = pci_resource_start(pdev, 3);
1897 /* i.e at offset 0x1c in the PCI configuration register space. */
1898 pciirq = pdev->irq;
1899 dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1900
1901 /* allot the first empty slot in the array */
1902 for (index = 0; index < BOARD_COUNT; index++)
1903 if (isi_card[index].base == 0) {
1904 board = &isi_card[index];
1905 break;
1906 }
1907
1908 board->base = ioaddr;
1909 board->irq = pciirq;
1910 board->isa = NO;
1911 card++;
1912
1913 pci_set_drvdata(pdev, board);
1914
1915 retval = isicom_register_ioregion(pdev, index);
1916 if (retval < 0)
1917 goto err;
1918
1919 retval = isicom_register_isr(pdev, index);
1920 if (retval < 0)
1921 goto errunrr;
1922
1923 retval = reset_card(pdev, index, &signature);
1924 if (retval < 0)
1925 goto errunri;
1926
1927 retval = load_firmware(pdev, index, signature);
1928 if (retval < 0)
1929 goto errunri;
1930
1931 return 0;
1932
1933 errunri:
1934 free_irq(board->irq, board);
1935 errunrr:
1936 isicom_unregister_ioregion(pdev);
1937 err:
1938 board->base = 0;
1939 return retval;
1940 }
1941
1942 static void __devexit isicom_remove(struct pci_dev *pdev)
1943 {
1944 struct isi_board *board = pci_get_drvdata(pdev);
1945
1946 free_irq(board->irq, board);
1947 isicom_unregister_ioregion(pdev);
1948 }
1949
1950 static int __devinit isicom_setup(void)
1951 {
1952 int retval, idx, channel;
1953 struct isi_port *port;
1954
1955 card = 0;
1956 memset(isi_ports, 0, sizeof(isi_ports));
1957
1958 for(idx = 0; idx < BOARD_COUNT; idx++) {
1959 port = &isi_ports[idx * 16];
1960 isi_card[idx].ports = port;
1961 spin_lock_init(&isi_card[idx].card_lock);
1962 for (channel = 0; channel < 16; channel++, port++) {
1963 port->magic = ISICOM_MAGIC;
1964 port->card = &isi_card[idx];
1965 port->channel = channel;
1966 port->close_delay = 50 * HZ/100;
1967 port->closing_wait = 3000 * HZ/100;
1968 INIT_WORK(&port->hangup_tq, do_isicom_hangup, port);
1969 INIT_WORK(&port->bh_tqueue, isicom_bottomhalf, port);
1970 port->status = 0;
1971 init_waitqueue_head(&port->open_wait);
1972 init_waitqueue_head(&port->close_wait);
1973 /* . . . */
1974 }
1975 isi_card[idx].base = 0;
1976 isi_card[idx].irq = 0;
1977
1978 if (!io[idx])
1979 continue;
1980
1981 if (irq[idx] == 2 || irq[idx] == 3 || irq[idx] == 4 ||
1982 irq[idx] == 5 || irq[idx] == 7 ||
1983 irq[idx] == 10 || irq[idx] == 11 ||
1984 irq[idx] == 12 || irq[idx] == 15) {
1985 printk(KERN_ERR "ISICOM: ISA not supported yet.\n");
1986 retval = -EINVAL;
1987 goto error;
1988 } else
1989 printk(KERN_ERR "ISICOM: Irq %d unsupported. "
1990 "Disabling Card%d...\n", irq[idx], idx + 1);
1991 }
1992
1993 retval = isicom_register_tty_driver();
1994 if (retval < 0)
1995 goto error;
1996
1997 retval = pci_register_driver(&isicom_driver);
1998 if (retval < 0) {
1999 printk(KERN_ERR "ISICOM: Unable to register pci driver.\n");
2000 goto errtty;
2001 }
2002
2003 init_timer(&tx);
2004 tx.expires = jiffies + 1;
2005 tx.data = 0;
2006 tx.function = isicom_tx;
2007 re_schedule = 1;
2008 add_timer(&tx);
2009
2010 return 0;
2011 errtty:
2012 isicom_unregister_tty_driver();
2013 error:
2014 return retval;
2015 }
2016
2017 static void __exit isicom_exit(void)
2018 {
2019 unsigned int index = 0;
2020
2021 re_schedule = 0;
2022
2023 while (re_schedule != 2 && index++ < 100)
2024 msleep(10);
2025
2026 pci_unregister_driver(&isicom_driver);
2027 isicom_unregister_tty_driver();
2028 }
2029
2030 module_init(isicom_setup);
2031 module_exit(isicom_exit);
2032
2033 MODULE_AUTHOR("MultiTech");
2034 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
2035 MODULE_LICENSE("GPL");
2036 module_param_array(io, int, NULL, 0);
2037 MODULE_PARM_DESC(io, "I/O ports for the cards");
2038 module_param_array(irq, int, NULL, 0);
2039 MODULE_PARM_DESC(irq, "Interrupts for the cards");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree