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[PATCH] Char: isicom, remove tty_{hang,wake}up bottomhalves
[linux-2.6/kvm.git] / drivers / char / isicom.c
blob26d3f78bf8edccc463e6aad6d39f5b2261f561b2
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 DECLARE_COMPLETION(isi_timerdone);
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 static DEFINE_TIMER(tx, isicom_tx, 0, 0);
182
183 /* baud index mappings from linux defns to isi */
184
185 static signed char linuxb_to_isib[] = {
186 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19
187 };
188
189 struct isi_board {
190 unsigned long base;
191 unsigned char irq;
192 unsigned char port_count;
193 unsigned short status;
194 unsigned short port_status; /* each bit for each port */
195 unsigned short shift_count;
196 struct isi_port * ports;
197 signed char count;
198 spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
199 unsigned long flags;
200 unsigned int index;
201 };
202
203 struct isi_port {
204 unsigned short magic;
205 unsigned int flags;
206 int count;
207 int blocked_open;
208 int close_delay;
209 u16 channel;
210 u16 status;
211 u16 closing_wait;
212 struct isi_board * card;
213 struct tty_struct * tty;
214 wait_queue_head_t close_wait;
215 wait_queue_head_t open_wait;
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 inline int WaitTillCardIsFree(u16 base)
232 {
233 unsigned int count = 0;
234 unsigned int a = in_atomic(); /* do we run under spinlock? */
235
236 while (!(inw(base + 0xe) & 0x1) && count++ < 100)
237 if (a)
238 mdelay(1);
239 else
240 msleep(1);
241
242 return !(inw(base + 0xe) & 0x1);
243 }
244
245 static int lock_card(struct isi_board *card)
246 {
247 char retries;
248 unsigned long base = card->base;
249
250 for (retries = 0; retries < 100; retries++) {
251 spin_lock_irqsave(&card->card_lock, card->flags);
252 if (inw(base + 0xe) & 0x1) {
253 return 1;
254 } else {
255 spin_unlock_irqrestore(&card->card_lock, card->flags);
256 udelay(1000); /* 1ms */
257 }
258 }
259 printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n",
260 card->base);
261
262 return 0; /* Failed to acquire the card! */
263 }
264
265 static int lock_card_at_interrupt(struct isi_board *card)
266 {
267 unsigned char retries;
268 unsigned long base = card->base;
269
270 for (retries = 0; retries < 200; retries++) {
271 spin_lock_irqsave(&card->card_lock, card->flags);
272
273 if (inw(base + 0xe) & 0x1)
274 return 1;
275 else
276 spin_unlock_irqrestore(&card->card_lock, card->flags);
277 }
278 /* Failing in interrupt is an acceptable event */
279 return 0; /* Failed to acquire the card! */
280 }
281
282 static void unlock_card(struct isi_board *card)
283 {
284 spin_unlock_irqrestore(&card->card_lock, card->flags);
285 }
286
287 /*
288 * ISI Card specific ops ...
289 */
290
291 /* card->lock HAS to be held */
292 static void raise_dtr(struct isi_port *port)
293 {
294 struct isi_board *card = port->card;
295 unsigned long base = card->base;
296 u16 channel = port->channel;
297
298 if (WaitTillCardIsFree(base))
299 return;
300
301 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
302 outw(0x0504, base);
303 InterruptTheCard(base);
304 port->status |= ISI_DTR;
305 }
306
307 /* card->lock HAS to be held */
308 static inline void drop_dtr(struct isi_port *port)
309 {
310 struct isi_board *card = port->card;
311 unsigned long base = card->base;
312 u16 channel = port->channel;
313
314 if (WaitTillCardIsFree(base))
315 return;
316
317 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
318 outw(0x0404, base);
319 InterruptTheCard(base);
320 port->status &= ~ISI_DTR;
321 }
322
323 /* card->lock HAS to be held */
324 static inline void raise_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 (WaitTillCardIsFree(base))
331 return;
332
333 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
334 outw(0x0a04, base);
335 InterruptTheCard(base);
336 port->status |= ISI_RTS;
337 }
338
339 /* card->lock HAS to be held */
340 static inline void drop_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 (WaitTillCardIsFree(base))
347 return;
348
349 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
350 outw(0x0804, base);
351 InterruptTheCard(base);
352 port->status &= ~ISI_RTS;
353 }
354
355 /* card->lock MUST NOT be held */
356 static inline void raise_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(0x0f04, base);
367 InterruptTheCard(base);
368 port->status |= (ISI_DTR | ISI_RTS);
369 unlock_card(card);
370 }
371
372 /* card->lock HAS to be held */
373 static void drop_dtr_rts(struct isi_port *port)
374 {
375 struct isi_board *card = port->card;
376 unsigned long base = card->base;
377 u16 channel = port->channel;
378
379 if (WaitTillCardIsFree(base))
380 return;
381
382 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
383 outw(0x0c04, base);
384 InterruptTheCard(base);
385 port->status &= ~(ISI_RTS | ISI_DTR);
386 }
387
388 /*
389 * ISICOM Driver specific routines ...
390 *
391 */
392
393 static inline int __isicom_paranoia_check(struct isi_port const *port,
394 char *name, const char *routine)
395 {
396 if (!port) {
397 printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for "
398 "dev %s in %s.\n", name, routine);
399 return 1;
400 }
401 if (port->magic != ISICOM_MAGIC) {
402 printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for "
403 "dev %s in %s.\n", name, routine);
404 return 1;
405 }
406
407 return 0;
408 }
409
410 /*
411 * Transmitter.
412 *
413 * We shovel data into the card buffers on a regular basis. The card
414 * will do the rest of the work for us.
415 */
416
417 static void isicom_tx(unsigned long _data)
418 {
419 short count = (BOARD_COUNT-1), card, base;
420 short txcount, wrd, residue, word_count, cnt;
421 struct isi_port *port;
422 struct tty_struct *tty;
423
424 /* find next active board */
425 card = (prev_card + 1) & 0x0003;
426 while(count-- > 0) {
427 if (isi_card[card].status & BOARD_ACTIVE)
428 break;
429 card = (card + 1) & 0x0003;
430 }
431 if (!(isi_card[card].status & BOARD_ACTIVE))
432 goto sched_again;
433
434 prev_card = card;
435
436 count = isi_card[card].port_count;
437 port = isi_card[card].ports;
438 base = isi_card[card].base;
439 for (;count > 0;count--, port++) {
440 if (!lock_card_at_interrupt(&isi_card[card]))
441 continue;
442 /* port not active or tx disabled to force flow control */
443 if (!(port->flags & ASYNC_INITIALIZED) ||
444 !(port->status & ISI_TXOK))
445 unlock_card(&isi_card[card]);
446 continue;
447
448 tty = port->tty;
449
450
451 if (tty == NULL) {
452 unlock_card(&isi_card[card]);
453 continue;
454 }
455
456 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
457 if (txcount <= 0 || tty->stopped || tty->hw_stopped) {
458 unlock_card(&isi_card[card]);
459 continue;
460 }
461 if (!(inw(base + 0x02) & (1 << port->channel))) {
462 unlock_card(&isi_card[card]);
463 continue;
464 }
465 pr_dbg("txing %d bytes, port%d.\n", txcount,
466 port->channel + 1);
467 outw((port->channel << isi_card[card].shift_count) | txcount,
468 base);
469 residue = NO;
470 wrd = 0;
471 while (1) {
472 cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
473 - port->xmit_tail));
474 if (residue == YES) {
475 residue = NO;
476 if (cnt > 0) {
477 wrd |= (port->xmit_buf[port->xmit_tail]
478 << 8);
479 port->xmit_tail = (port->xmit_tail + 1)
480 & (SERIAL_XMIT_SIZE - 1);
481 port->xmit_cnt--;
482 txcount--;
483 cnt--;
484 outw(wrd, base);
485 } else {
486 outw(wrd, base);
487 break;
488 }
489 }
490 if (cnt <= 0) break;
491 word_count = cnt >> 1;
492 outsw(base, port->xmit_buf+port->xmit_tail,word_count);
493 port->xmit_tail = (port->xmit_tail
494 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
495 txcount -= (word_count << 1);
496 port->xmit_cnt -= (word_count << 1);
497 if (cnt & 0x0001) {
498 residue = YES;
499 wrd = port->xmit_buf[port->xmit_tail];
500 port->xmit_tail = (port->xmit_tail + 1)
501 & (SERIAL_XMIT_SIZE - 1);
502 port->xmit_cnt--;
503 txcount--;
504 }
505 }
506
507 InterruptTheCard(base);
508 if (port->xmit_cnt <= 0)
509 port->status &= ~ISI_TXOK;
510 if (port->xmit_cnt <= WAKEUP_CHARS)
511 tty_wakeup(tty);
512 unlock_card(&isi_card[card]);
513 }
514
515 /* schedule another tx for hopefully in about 10ms */
516 sched_again:
517 if (!re_schedule) {
518 complete(&isi_timerdone);
519 return;
520 }
521
522 mod_timer(&tx, jiffies + msecs_to_jiffies(10));
523 }
524
525 /*
526 * Main interrupt handler routine
527 */
528
529 static irqreturn_t isicom_interrupt(int irq, void *dev_id)
530 {
531 struct isi_board *card = dev_id;
532 struct isi_port *port;
533 struct tty_struct *tty;
534 unsigned long base;
535 u16 header, word_count, count, channel;
536 short byte_count;
537 unsigned char *rp;
538
539 if (!card || !(card->status & FIRMWARE_LOADED))
540 return IRQ_NONE;
541
542 base = card->base;
543 spin_lock(&card->card_lock);
544
545 /*
546 * disable any interrupts from the PCI card and lower the
547 * interrupt line
548 */
549 outw(0x8000, base+0x04);
550 ClearInterrupt(base);
551
552 inw(base); /* get the dummy word out */
553 header = inw(base);
554 channel = (header & 0x7800) >> card->shift_count;
555 byte_count = header & 0xff;
556
557 if (channel + 1 > card->port_count) {
558 printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): "
559 "%d(channel) > port_count.\n", base, channel+1);
560 outw(0x0000, base+0x04); /* enable interrupts */
561 spin_unlock(&card->card_lock);
562 return IRQ_HANDLED;
563 }
564 port = card->ports + channel;
565 if (!(port->flags & ASYNC_INITIALIZED)) {
566 outw(0x0000, base+0x04); /* enable interrupts */
567 return IRQ_HANDLED;
568 }
569
570 tty = port->tty;
571 if (tty == NULL) {
572 word_count = byte_count >> 1;
573 while(byte_count > 1) {
574 inw(base);
575 byte_count -= 2;
576 }
577 if (byte_count & 0x01)
578 inw(base);
579 outw(0x0000, base+0x04); /* enable interrupts */
580 spin_unlock(&card->card_lock);
581 return IRQ_HANDLED;
582 }
583
584 if (header & 0x8000) { /* Status Packet */
585 header = inw(base);
586 switch(header & 0xff) {
587 case 0: /* Change in EIA signals */
588 if (port->flags & ASYNC_CHECK_CD) {
589 if (port->status & ISI_DCD) {
590 if (!(header & ISI_DCD)) {
591 /* Carrier has been lost */
592 pr_dbg("interrupt: DCD->low.\n"
593 );
594 port->status &= ~ISI_DCD;
595 tty_hangup(tty);
596 }
597 } else if (header & ISI_DCD) {
598 /* Carrier has been detected */
599 pr_dbg("interrupt: DCD->high.\n");
600 port->status |= ISI_DCD;
601 wake_up_interruptible(&port->open_wait);
602 }
603 } else {
604 if (header & ISI_DCD)
605 port->status |= ISI_DCD;
606 else
607 port->status &= ~ISI_DCD;
608 }
609
610 if (port->flags & ASYNC_CTS_FLOW) {
611 if (port->tty->hw_stopped) {
612 if (header & ISI_CTS) {
613 port->tty->hw_stopped = 0;
614 /* start tx ing */
615 port->status |= (ISI_TXOK
616 | ISI_CTS);
617 tty_wakeup(tty);
618 }
619 } else if (!(header & ISI_CTS)) {
620 port->tty->hw_stopped = 1;
621 /* stop tx ing */
622 port->status &= ~(ISI_TXOK | ISI_CTS);
623 }
624 } else {
625 if (header & ISI_CTS)
626 port->status |= ISI_CTS;
627 else
628 port->status &= ~ISI_CTS;
629 }
630
631 if (header & ISI_DSR)
632 port->status |= ISI_DSR;
633 else
634 port->status &= ~ISI_DSR;
635
636 if (header & ISI_RI)
637 port->status |= ISI_RI;
638 else
639 port->status &= ~ISI_RI;
640
641 break;
642
643 case 1: /* Received Break !!! */
644 tty_insert_flip_char(tty, 0, TTY_BREAK);
645 if (port->flags & ASYNC_SAK)
646 do_SAK(tty);
647 tty_flip_buffer_push(tty);
648 break;
649
650 case 2: /* Statistics */
651 pr_dbg("isicom_interrupt: stats!!!.\n");
652 break;
653
654 default:
655 pr_dbg("Intr: Unknown code in status packet.\n");
656 break;
657 }
658 } else { /* Data Packet */
659
660 count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
661 pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count);
662 word_count = count >> 1;
663 insw(base, rp, word_count);
664 byte_count -= (word_count << 1);
665 if (count & 0x0001) {
666 tty_insert_flip_char(tty, inw(base) & 0xff,
667 TTY_NORMAL);
668 byte_count -= 2;
669 }
670 if (byte_count > 0) {
671 pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping "
672 "bytes...\n", base, channel + 1);
673 while(byte_count > 0) { /* drain out unread xtra data */
674 inw(base);
675 byte_count -= 2;
676 }
677 }
678 tty_flip_buffer_push(tty);
679 }
680 outw(0x0000, base+0x04); /* enable interrupts */
681
682 return IRQ_HANDLED;
683 }
684
685 static void isicom_config_port(struct isi_port *port)
686 {
687 struct isi_board *card = port->card;
688 struct tty_struct *tty;
689 unsigned long baud;
690 unsigned long base = card->base;
691 u16 channel_setup, channel = port->channel,
692 shift_count = card->shift_count;
693 unsigned char flow_ctrl;
694
695 if (!(tty = port->tty) || !tty->termios)
696 return;
697 baud = C_BAUD(tty);
698 if (baud & CBAUDEX) {
699 baud &= ~CBAUDEX;
700
701 /* if CBAUDEX bit is on and the baud is set to either 50 or 75
702 * then the card is programmed for 57.6Kbps or 115Kbps
703 * respectively.
704 */
705
706 if (baud < 1 || baud > 2)
707 port->tty->termios->c_cflag &= ~CBAUDEX;
708 else
709 baud += 15;
710 }
711 if (baud == 15) {
712
713 /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
714 * by the set_serial_info ioctl ... this is done by
715 * the 'setserial' utility.
716 */
717
718 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
719 baud++; /* 57.6 Kbps */
720 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
721 baud +=2; /* 115 Kbps */
722 }
723 if (linuxb_to_isib[baud] == -1) {
724 /* hang up */
725 drop_dtr(port);
726 return;
727 }
728 else
729 raise_dtr(port);
730
731 if (WaitTillCardIsFree(base) == 0) {
732 outw(0x8000 | (channel << shift_count) |0x03, base);
733 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
734 channel_setup = 0;
735 switch(C_CSIZE(tty)) {
736 case CS5:
737 channel_setup |= ISICOM_CS5;
738 break;
739 case CS6:
740 channel_setup |= ISICOM_CS6;
741 break;
742 case CS7:
743 channel_setup |= ISICOM_CS7;
744 break;
745 case CS8:
746 channel_setup |= ISICOM_CS8;
747 break;
748 }
749
750 if (C_CSTOPB(tty))
751 channel_setup |= ISICOM_2SB;
752 if (C_PARENB(tty)) {
753 channel_setup |= ISICOM_EVPAR;
754 if (C_PARODD(tty))
755 channel_setup |= ISICOM_ODPAR;
756 }
757 outw(channel_setup, base);
758 InterruptTheCard(base);
759 }
760 if (C_CLOCAL(tty))
761 port->flags &= ~ASYNC_CHECK_CD;
762 else
763 port->flags |= ASYNC_CHECK_CD;
764
765 /* flow control settings ...*/
766 flow_ctrl = 0;
767 port->flags &= ~ASYNC_CTS_FLOW;
768 if (C_CRTSCTS(tty)) {
769 port->flags |= ASYNC_CTS_FLOW;
770 flow_ctrl |= ISICOM_CTSRTS;
771 }
772 if (I_IXON(tty))
773 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
774 if (I_IXOFF(tty))
775 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
776
777 if (WaitTillCardIsFree(base) == 0) {
778 outw(0x8000 | (channel << shift_count) |0x04, base);
779 outw(flow_ctrl << 8 | 0x05, base);
780 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
781 InterruptTheCard(base);
782 }
783
784 /* rx enabled -> enable port for rx on the card */
785 if (C_CREAD(tty)) {
786 card->port_status |= (1 << channel);
787 outw(card->port_status, base + 0x02);
788 }
789 }
790
791 /* open et all */
792
793 static inline void isicom_setup_board(struct isi_board *bp)
794 {
795 int channel;
796 struct isi_port *port;
797 unsigned long flags;
798
799 spin_lock_irqsave(&bp->card_lock, flags);
800 if (bp->status & BOARD_ACTIVE) {
801 spin_unlock_irqrestore(&bp->card_lock, flags);
802 return;
803 }
804 port = bp->ports;
805 bp->status |= BOARD_ACTIVE;
806 for (channel = 0; channel < bp->port_count; channel++, port++)
807 drop_dtr_rts(port);
808 spin_unlock_irqrestore(&bp->card_lock, flags);
809 }
810
811 static int isicom_setup_port(struct isi_port *port)
812 {
813 struct isi_board *card = port->card;
814 unsigned long flags;
815
816 if (port->flags & ASYNC_INITIALIZED) {
817 return 0;
818 }
819 if (!port->xmit_buf) {
820 unsigned long page;
821
822 if (!(page = get_zeroed_page(GFP_KERNEL)))
823 return -ENOMEM;
824
825 if (port->xmit_buf) {
826 free_page(page);
827 return -ERESTARTSYS;
828 }
829 port->xmit_buf = (unsigned char *) page;
830 }
831
832 spin_lock_irqsave(&card->card_lock, flags);
833 if (port->tty)
834 clear_bit(TTY_IO_ERROR, &port->tty->flags);
835 if (port->count == 1)
836 card->count++;
837
838 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
839
840 /* discard any residual data */
841 if (WaitTillCardIsFree(card->base) == 0) {
842 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
843 card->base);
844 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
845 InterruptTheCard(card->base);
846 }
847
848 isicom_config_port(port);
849 port->flags |= ASYNC_INITIALIZED;
850 spin_unlock_irqrestore(&card->card_lock, flags);
851
852 return 0;
853 }
854
855 static int block_til_ready(struct tty_struct *tty, struct file *filp,
856 struct isi_port *port)
857 {
858 struct isi_board *card = port->card;
859 int do_clocal = 0, retval;
860 unsigned long flags;
861 DECLARE_WAITQUEUE(wait, current);
862
863 /* block if port is in the process of being closed */
864
865 if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
866 pr_dbg("block_til_ready: close in progress.\n");
867 interruptible_sleep_on(&port->close_wait);
868 if (port->flags & ASYNC_HUP_NOTIFY)
869 return -EAGAIN;
870 else
871 return -ERESTARTSYS;
872 }
873
874 /* if non-blocking mode is set ... */
875
876 if ((filp->f_flags & O_NONBLOCK) ||
877 (tty->flags & (1 << TTY_IO_ERROR))) {
878 pr_dbg("block_til_ready: non-block mode.\n");
879 port->flags |= ASYNC_NORMAL_ACTIVE;
880 return 0;
881 }
882
883 if (C_CLOCAL(tty))
884 do_clocal = 1;
885
886 /* block waiting for DCD to be asserted, and while
887 callout dev is busy */
888 retval = 0;
889 add_wait_queue(&port->open_wait, &wait);
890
891 spin_lock_irqsave(&card->card_lock, flags);
892 if (!tty_hung_up_p(filp))
893 port->count--;
894 port->blocked_open++;
895 spin_unlock_irqrestore(&card->card_lock, flags);
896
897 while (1) {
898 raise_dtr_rts(port);
899
900 set_current_state(TASK_INTERRUPTIBLE);
901 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
902 if (port->flags & ASYNC_HUP_NOTIFY)
903 retval = -EAGAIN;
904 else
905 retval = -ERESTARTSYS;
906 break;
907 }
908 if (!(port->flags & ASYNC_CLOSING) &&
909 (do_clocal || (port->status & ISI_DCD))) {
910 break;
911 }
912 if (signal_pending(current)) {
913 retval = -ERESTARTSYS;
914 break;
915 }
916 schedule();
917 }
918 set_current_state(TASK_RUNNING);
919 remove_wait_queue(&port->open_wait, &wait);
920 spin_lock_irqsave(&card->card_lock, flags);
921 if (!tty_hung_up_p(filp))
922 port->count++;
923 port->blocked_open--;
924 spin_unlock_irqrestore(&card->card_lock, flags);
925 if (retval)
926 return retval;
927 port->flags |= ASYNC_NORMAL_ACTIVE;
928 return 0;
929 }
930
931 static int isicom_open(struct tty_struct *tty, struct file *filp)
932 {
933 struct isi_port *port;
934 struct isi_board *card;
935 unsigned int board;
936 int error, line;
937
938 line = tty->index;
939 if (line < 0 || line > PORT_COUNT-1)
940 return -ENODEV;
941 board = BOARD(line);
942 card = &isi_card[board];
943
944 if (!(card->status & FIRMWARE_LOADED))
945 return -ENODEV;
946
947 /* open on a port greater than the port count for the card !!! */
948 if (line > ((board * 16) + card->port_count - 1))
949 return -ENODEV;
950
951 port = &isi_ports[line];
952 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
953 return -ENODEV;
954
955 isicom_setup_board(card);
956
957 port->count++;
958 tty->driver_data = port;
959 port->tty = tty;
960 if ((error = isicom_setup_port(port))!=0)
961 return error;
962 if ((error = block_til_ready(tty, filp, port))!=0)
963 return error;
964
965 return 0;
966 }
967
968 /* close et all */
969
970 static inline void isicom_shutdown_board(struct isi_board *bp)
971 {
972 if (bp->status & BOARD_ACTIVE) {
973 bp->status &= ~BOARD_ACTIVE;
974 }
975 }
976
977 /* card->lock HAS to be held */
978 static void isicom_shutdown_port(struct isi_port *port)
979 {
980 struct isi_board *card = port->card;
981 struct tty_struct *tty;
982
983 tty = port->tty;
984
985 if (!(port->flags & ASYNC_INITIALIZED))
986 return;
987
988 if (port->xmit_buf) {
989 free_page((unsigned long) port->xmit_buf);
990 port->xmit_buf = NULL;
991 }
992 port->flags &= ~ASYNC_INITIALIZED;
993 /* 3rd October 2000 : Vinayak P Risbud */
994 port->tty = NULL;
995
996 /*Fix done by Anil .S on 30-04-2001
997 remote login through isi port has dtr toggle problem
998 due to which the carrier drops before the password prompt
999 appears on the remote end. Now we drop the dtr only if the
1000 HUPCL(Hangup on close) flag is set for the tty*/
1001
1002 if (C_HUPCL(tty))
1003 /* drop dtr on this port */
1004 drop_dtr(port);
1005
1006 /* any other port uninits */
1007 if (tty)
1008 set_bit(TTY_IO_ERROR, &tty->flags);
1009
1010 if (--card->count < 0) {
1011 pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n",
1012 card->base, card->count);
1013 card->count = 0;
1014 }
1015
1016 /* last port was closed, shutdown that boad too */
1017 if (C_HUPCL(tty)) {
1018 if (!card->count)
1019 isicom_shutdown_board(card);
1020 }
1021 }
1022
1023 static void isicom_close(struct tty_struct *tty, struct file *filp)
1024 {
1025 struct isi_port *port = tty->driver_data;
1026 struct isi_board *card;
1027 unsigned long flags;
1028
1029 if (!port)
1030 return;
1031 card = port->card;
1032 if (isicom_paranoia_check(port, tty->name, "isicom_close"))
1033 return;
1034
1035 pr_dbg("Close start!!!.\n");
1036
1037 spin_lock_irqsave(&card->card_lock, flags);
1038 if (tty_hung_up_p(filp)) {
1039 spin_unlock_irqrestore(&card->card_lock, flags);
1040 return;
1041 }
1042
1043 if (tty->count == 1 && port->count != 1) {
1044 printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
1045 "count tty->count = 1 port count = %d.\n",
1046 card->base, port->count);
1047 port->count = 1;
1048 }
1049 if (--port->count < 0) {
1050 printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
1051 "count for channel%d = %d", card->base, port->channel,
1052 port->count);
1053 port->count = 0;
1054 }
1055
1056 if (port->count) {
1057 spin_unlock_irqrestore(&card->card_lock, flags);
1058 return;
1059 }
1060 port->flags |= ASYNC_CLOSING;
1061 tty->closing = 1;
1062 spin_unlock_irqrestore(&card->card_lock, flags);
1063
1064 if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1065 tty_wait_until_sent(tty, port->closing_wait);
1066 /* indicate to the card that no more data can be received
1067 on this port */
1068 spin_lock_irqsave(&card->card_lock, flags);
1069 if (port->flags & ASYNC_INITIALIZED) {
1070 card->port_status &= ~(1 << port->channel);
1071 outw(card->port_status, card->base + 0x02);
1072 }
1073 isicom_shutdown_port(port);
1074 spin_unlock_irqrestore(&card->card_lock, flags);
1075
1076 if (tty->driver->flush_buffer)
1077 tty->driver->flush_buffer(tty);
1078 tty_ldisc_flush(tty);
1079
1080 spin_lock_irqsave(&card->card_lock, flags);
1081 tty->closing = 0;
1082
1083 if (port->blocked_open) {
1084 spin_unlock_irqrestore(&card->card_lock, flags);
1085 if (port->close_delay) {
1086 pr_dbg("scheduling until time out.\n");
1087 msleep_interruptible(
1088 jiffies_to_msecs(port->close_delay));
1089 }
1090 spin_lock_irqsave(&card->card_lock, flags);
1091 wake_up_interruptible(&port->open_wait);
1092 }
1093 port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1094 wake_up_interruptible(&port->close_wait);
1095 spin_unlock_irqrestore(&card->card_lock, flags);
1096 }
1097
1098 /* write et all */
1099 static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
1100 int count)
1101 {
1102 struct isi_port *port = tty->driver_data;
1103 struct isi_board *card = port->card;
1104 unsigned long flags;
1105 int cnt, total = 0;
1106
1107 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
1108 return 0;
1109
1110 if (!port->xmit_buf)
1111 return 0;
1112
1113 spin_lock_irqsave(&card->card_lock, flags);
1114
1115 while(1) {
1116 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
1117 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
1118 if (cnt <= 0)
1119 break;
1120
1121 memcpy(port->xmit_buf + port->xmit_head, buf, cnt);
1122 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
1123 - 1);
1124 port->xmit_cnt += cnt;
1125 buf += cnt;
1126 count -= cnt;
1127 total += cnt;
1128 }
1129 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
1130 port->status |= ISI_TXOK;
1131 spin_unlock_irqrestore(&card->card_lock, flags);
1132 return total;
1133 }
1134
1135 /* put_char et all */
1136 static void isicom_put_char(struct tty_struct *tty, unsigned char ch)
1137 {
1138 struct isi_port *port = tty->driver_data;
1139 struct isi_board *card = port->card;
1140 unsigned long flags;
1141
1142 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
1143 return;
1144
1145 if (!port->xmit_buf)
1146 return;
1147
1148 spin_lock_irqsave(&card->card_lock, flags);
1149 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
1150 spin_unlock_irqrestore(&card->card_lock, flags);
1151 return;
1152 }
1153
1154 port->xmit_buf[port->xmit_head++] = ch;
1155 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
1156 port->xmit_cnt++;
1157 spin_unlock_irqrestore(&card->card_lock, flags);
1158 }
1159
1160 /* flush_chars et all */
1161 static void isicom_flush_chars(struct tty_struct *tty)
1162 {
1163 struct isi_port *port = tty->driver_data;
1164
1165 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1166 return;
1167
1168 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1169 !port->xmit_buf)
1170 return;
1171
1172 /* this tells the transmitter to consider this port for
1173 data output to the card ... that's the best we can do. */
1174 port->status |= ISI_TXOK;
1175 }
1176
1177 /* write_room et all */
1178 static int isicom_write_room(struct tty_struct *tty)
1179 {
1180 struct isi_port *port = tty->driver_data;
1181 int free;
1182
1183 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1184 return 0;
1185
1186 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1187 if (free < 0)
1188 free = 0;
1189 return free;
1190 }
1191
1192 /* chars_in_buffer et all */
1193 static int isicom_chars_in_buffer(struct tty_struct *tty)
1194 {
1195 struct isi_port *port = tty->driver_data;
1196 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1197 return 0;
1198 return port->xmit_cnt;
1199 }
1200
1201 /* ioctl et all */
1202 static inline void isicom_send_break(struct isi_port *port,
1203 unsigned long length)
1204 {
1205 struct isi_board *card = port->card;
1206 unsigned long base = card->base;
1207
1208 if (!lock_card(card))
1209 return;
1210
1211 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1212 outw((length & 0xff) << 8 | 0x00, base);
1213 outw((length & 0xff00), base);
1214 InterruptTheCard(base);
1215
1216 unlock_card(card);
1217 }
1218
1219 static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
1220 {
1221 struct isi_port *port = tty->driver_data;
1222 /* just send the port status */
1223 u16 status = port->status;
1224
1225 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1226 return -ENODEV;
1227
1228 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1229 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1230 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1231 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1232 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1233 ((status & ISI_RI ) ? TIOCM_RI : 0);
1234 }
1235
1236 static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
1237 unsigned int set, unsigned int clear)
1238 {
1239 struct isi_port *port = tty->driver_data;
1240 unsigned long flags;
1241
1242 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1243 return -ENODEV;
1244
1245 spin_lock_irqsave(&port->card->card_lock, flags);
1246 if (set & TIOCM_RTS)
1247 raise_rts(port);
1248 if (set & TIOCM_DTR)
1249 raise_dtr(port);
1250
1251 if (clear & TIOCM_RTS)
1252 drop_rts(port);
1253 if (clear & TIOCM_DTR)
1254 drop_dtr(port);
1255 spin_unlock_irqrestore(&port->card->card_lock, flags);
1256
1257 return 0;
1258 }
1259
1260 static int isicom_set_serial_info(struct isi_port *port,
1261 struct serial_struct __user *info)
1262 {
1263 struct serial_struct newinfo;
1264 int reconfig_port;
1265
1266 if (copy_from_user(&newinfo, info, sizeof(newinfo)))
1267 return -EFAULT;
1268
1269 reconfig_port = ((port->flags & ASYNC_SPD_MASK) !=
1270 (newinfo.flags & ASYNC_SPD_MASK));
1271
1272 if (!capable(CAP_SYS_ADMIN)) {
1273 if ((newinfo.close_delay != port->close_delay) ||
1274 (newinfo.closing_wait != port->closing_wait) ||
1275 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1276 (port->flags & ~ASYNC_USR_MASK)))
1277 return -EPERM;
1278 port->flags = ((port->flags & ~ ASYNC_USR_MASK) |
1279 (newinfo.flags & ASYNC_USR_MASK));
1280 }
1281 else {
1282 port->close_delay = newinfo.close_delay;
1283 port->closing_wait = newinfo.closing_wait;
1284 port->flags = ((port->flags & ~ASYNC_FLAGS) |
1285 (newinfo.flags & ASYNC_FLAGS));
1286 }
1287 if (reconfig_port) {
1288 unsigned long flags;
1289 spin_lock_irqsave(&port->card->card_lock, flags);
1290 isicom_config_port(port);
1291 spin_unlock_irqrestore(&port->card->card_lock, flags);
1292 }
1293 return 0;
1294 }
1295
1296 static int isicom_get_serial_info(struct isi_port *port,
1297 struct serial_struct __user *info)
1298 {
1299 struct serial_struct out_info;
1300
1301 memset(&out_info, 0, sizeof(out_info));
1302 /* out_info.type = ? */
1303 out_info.line = port - isi_ports;
1304 out_info.port = port->card->base;
1305 out_info.irq = port->card->irq;
1306 out_info.flags = port->flags;
1307 /* out_info.baud_base = ? */
1308 out_info.close_delay = port->close_delay;
1309 out_info.closing_wait = port->closing_wait;
1310 if (copy_to_user(info, &out_info, sizeof(out_info)))
1311 return -EFAULT;
1312 return 0;
1313 }
1314
1315 static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
1316 unsigned int cmd, unsigned long arg)
1317 {
1318 struct isi_port *port = tty->driver_data;
1319 void __user *argp = (void __user *)arg;
1320 int retval;
1321
1322 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1323 return -ENODEV;
1324
1325 switch(cmd) {
1326 case TCSBRK:
1327 retval = tty_check_change(tty);
1328 if (retval)
1329 return retval;
1330 tty_wait_until_sent(tty, 0);
1331 if (!arg)
1332 isicom_send_break(port, HZ/4);
1333 return 0;
1334
1335 case TCSBRKP:
1336 retval = tty_check_change(tty);
1337 if (retval)
1338 return retval;
1339 tty_wait_until_sent(tty, 0);
1340 isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4);
1341 return 0;
1342
1343 case TIOCGSOFTCAR:
1344 return put_user(C_CLOCAL(tty) ? 1 : 0,
1345 (unsigned long __user *)argp);
1346
1347 case TIOCSSOFTCAR:
1348 if (get_user(arg, (unsigned long __user *) argp))
1349 return -EFAULT;
1350 tty->termios->c_cflag =
1351 ((tty->termios->c_cflag & ~CLOCAL) |
1352 (arg ? CLOCAL : 0));
1353 return 0;
1354
1355 case TIOCGSERIAL:
1356 return isicom_get_serial_info(port, argp);
1357
1358 case TIOCSSERIAL:
1359 return isicom_set_serial_info(port, argp);
1360
1361 default:
1362 return -ENOIOCTLCMD;
1363 }
1364 return 0;
1365 }
1366
1367 /* set_termios et all */
1368 static void isicom_set_termios(struct tty_struct *tty,
1369 struct ktermios *old_termios)
1370 {
1371 struct isi_port *port = tty->driver_data;
1372 unsigned long flags;
1373
1374 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1375 return;
1376
1377 if (tty->termios->c_cflag == old_termios->c_cflag &&
1378 tty->termios->c_iflag == old_termios->c_iflag)
1379 return;
1380
1381 spin_lock_irqsave(&port->card->card_lock, flags);
1382 isicom_config_port(port);
1383 spin_unlock_irqrestore(&port->card->card_lock, flags);
1384
1385 if ((old_termios->c_cflag & CRTSCTS) &&
1386 !(tty->termios->c_cflag & CRTSCTS)) {
1387 tty->hw_stopped = 0;
1388 isicom_start(tty);
1389 }
1390 }
1391
1392 /* throttle et all */
1393 static void isicom_throttle(struct tty_struct *tty)
1394 {
1395 struct isi_port *port = tty->driver_data;
1396 struct isi_board *card = port->card;
1397
1398 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1399 return;
1400
1401 /* tell the card that this port cannot handle any more data for now */
1402 card->port_status &= ~(1 << port->channel);
1403 outw(card->port_status, card->base + 0x02);
1404 }
1405
1406 /* unthrottle et all */
1407 static void isicom_unthrottle(struct tty_struct *tty)
1408 {
1409 struct isi_port *port = tty->driver_data;
1410 struct isi_board *card = port->card;
1411
1412 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1413 return;
1414
1415 /* tell the card that this port is ready to accept more data */
1416 card->port_status |= (1 << port->channel);
1417 outw(card->port_status, card->base + 0x02);
1418 }
1419
1420 /* stop et all */
1421 static void isicom_stop(struct tty_struct *tty)
1422 {
1423 struct isi_port *port = tty->driver_data;
1424
1425 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1426 return;
1427
1428 /* this tells the transmitter not to consider this port for
1429 data output to the card. */
1430 port->status &= ~ISI_TXOK;
1431 }
1432
1433 /* start et all */
1434 static void isicom_start(struct tty_struct *tty)
1435 {
1436 struct isi_port *port = tty->driver_data;
1437
1438 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1439 return;
1440
1441 /* this tells the transmitter to consider this port for
1442 data output to the card. */
1443 port->status |= ISI_TXOK;
1444 }
1445
1446 static void isicom_hangup(struct tty_struct *tty)
1447 {
1448 struct isi_port *port = tty->driver_data;
1449 unsigned long flags;
1450
1451 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1452 return;
1453
1454 spin_lock_irqsave(&port->card->card_lock, flags);
1455 isicom_shutdown_port(port);
1456 spin_unlock_irqrestore(&port->card->card_lock, flags);
1457
1458 port->count = 0;
1459 port->flags &= ~ASYNC_NORMAL_ACTIVE;
1460 port->tty = NULL;
1461 wake_up_interruptible(&port->open_wait);
1462 }
1463
1464 /* flush_buffer et all */
1465 static void isicom_flush_buffer(struct tty_struct *tty)
1466 {
1467 struct isi_port *port = tty->driver_data;
1468 struct isi_board *card = port->card;
1469 unsigned long flags;
1470
1471 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
1472 return;
1473
1474 spin_lock_irqsave(&card->card_lock, flags);
1475 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1476 spin_unlock_irqrestore(&card->card_lock, flags);
1477
1478 wake_up_interruptible(&tty->write_wait);
1479 tty_wakeup(tty);
1480 }
1481
1482 /*
1483 * Driver init and deinit functions
1484 */
1485
1486 static const struct tty_operations isicom_ops = {
1487 .open = isicom_open,
1488 .close = isicom_close,
1489 .write = isicom_write,
1490 .put_char = isicom_put_char,
1491 .flush_chars = isicom_flush_chars,
1492 .write_room = isicom_write_room,
1493 .chars_in_buffer = isicom_chars_in_buffer,
1494 .ioctl = isicom_ioctl,
1495 .set_termios = isicom_set_termios,
1496 .throttle = isicom_throttle,
1497 .unthrottle = isicom_unthrottle,
1498 .stop = isicom_stop,
1499 .start = isicom_start,
1500 .hangup = isicom_hangup,
1501 .flush_buffer = isicom_flush_buffer,
1502 .tiocmget = isicom_tiocmget,
1503 .tiocmset = isicom_tiocmset,
1504 };
1505
1506 static int __devinit reset_card(struct pci_dev *pdev,
1507 const unsigned int card, unsigned int *signature)
1508 {
1509 struct isi_board *board = pci_get_drvdata(pdev);
1510 unsigned long base = board->base;
1511 unsigned int portcount = 0;
1512 int retval = 0;
1513
1514 dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1515 base);
1516
1517 inw(base + 0x8);
1518
1519 mdelay(10);
1520
1521 outw(0, base + 0x8); /* Reset */
1522
1523 msleep(3000);
1524
1525 *signature = inw(base + 0x4) & 0xff;
1526
1527 portcount = inw(base + 0x2);
1528 if (!(inw(base + 0xe) & 0x1) || ((portcount != 0) &&
1529 (portcount != 4) && (portcount != 8))) {
1530 dev_dbg(&pdev->dev, "base+0x2=0x%lx, base+0xe=0x%lx\n",
1531 inw(base + 0x2), inw(base + 0xe));
1532 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure "
1533 "(Possible bad I/O Port Address 0x%lx).\n",
1534 card + 1, base);
1535 retval = -EIO;
1536 goto end;
1537 }
1538
1539 switch (*signature) {
1540 case 0xa5:
1541 case 0xbb:
1542 case 0xdd:
1543 board->port_count = (portcount == 4) ? 4 : 8;
1544 board->shift_count = 12;
1545 break;
1546 case 0xcc:
1547 board->port_count = 16;
1548 board->shift_count = 11;
1549 break;
1550 default:
1551 dev_warn(&pdev->dev, "ISILoad:Card%d reset failure (Possible "
1552 "bad I/O Port Address 0x%lx).\n", card + 1, base);
1553 dev_dbg(&pdev->dev, "Sig=0x%lx\n", signature);
1554 retval = -EIO;
1555 }
1556 dev_info(&pdev->dev, "-Done\n");
1557
1558 end:
1559 return retval;
1560 }
1561
1562 static int __devinit load_firmware(struct pci_dev *pdev,
1563 const unsigned int index, const unsigned int signature)
1564 {
1565 struct isi_board *board = pci_get_drvdata(pdev);
1566 const struct firmware *fw;
1567 unsigned long base = board->base;
1568 unsigned int a;
1569 u16 word_count, status;
1570 int retval = -EIO;
1571 char *name;
1572 u8 *data;
1573
1574 struct stframe {
1575 u16 addr;
1576 u16 count;
1577 u8 data[0];
1578 } *frame;
1579
1580 switch (signature) {
1581 case 0xa5:
1582 name = "isi608.bin";
1583 break;
1584 case 0xbb:
1585 name = "isi608em.bin";
1586 break;
1587 case 0xcc:
1588 name = "isi616em.bin";
1589 break;
1590 case 0xdd:
1591 name = "isi4608.bin";
1592 break;
1593 case 0xee:
1594 name = "isi4616.bin";
1595 break;
1596 default:
1597 dev_err(&pdev->dev, "Unknown signature.\n");
1598 goto end;
1599 }
1600
1601 retval = request_firmware(&fw, name, &pdev->dev);
1602 if (retval)
1603 goto end;
1604
1605 retval = -EIO;
1606
1607 for (frame = (struct stframe *)fw->data;
1608 frame < (struct stframe *)(fw->data + fw->size);
1609 frame = (struct stframe *)((u8 *)(frame + 1) +
1610 frame->count)) {
1611 if (WaitTillCardIsFree(base))
1612 goto errrelfw;
1613
1614 outw(0xf0, base); /* start upload sequence */
1615 outw(0x00, base);
1616 outw(frame->addr, base); /* lsb of address */
1617
1618 word_count = frame->count / 2 + frame->count % 2;
1619 outw(word_count, base);
1620 InterruptTheCard(base);
1621
1622 udelay(100); /* 0x2f */
1623
1624 if (WaitTillCardIsFree(base))
1625 goto errrelfw;
1626
1627 if ((status = inw(base + 0x4)) != 0) {
1628 dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1629 "Address:0x%x\nCount:0x%x\nStatus:0x%x\n",
1630 index + 1, frame->addr, frame->count, status);
1631 goto errrelfw;
1632 }
1633 outsw(base, frame->data, word_count);
1634
1635 InterruptTheCard(base);
1636
1637 udelay(50); /* 0x0f */
1638
1639 if (WaitTillCardIsFree(base))
1640 goto errrelfw;
1641
1642 if ((status = inw(base + 0x4)) != 0) {
1643 dev_err(&pdev->dev, "Card%d got out of sync.Card "
1644 "Status:0x%x\n", index + 1, status);
1645 goto errrelfw;
1646 }
1647 }
1648
1649 /* XXX: should we test it by reading it back and comparing with original like
1650 * in load firmware package? */
1651 for (frame = (struct stframe *)fw->data;
1652 frame < (struct stframe *)(fw->data + fw->size);
1653 frame = (struct stframe *)((u8 *)(frame + 1) +
1654 frame->count)) {
1655 if (WaitTillCardIsFree(base))
1656 goto errrelfw;
1657
1658 outw(0xf1, base); /* start download sequence */
1659 outw(0x00, base);
1660 outw(frame->addr, base); /* lsb of address */
1661
1662 word_count = (frame->count >> 1) + frame->count % 2;
1663 outw(word_count + 1, base);
1664 InterruptTheCard(base);
1665
1666 udelay(50); /* 0xf */
1667
1668 if (WaitTillCardIsFree(base))
1669 goto errrelfw;
1670
1671 if ((status = inw(base + 0x4)) != 0) {
1672 dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1673 "Address:0x%x\nCount:0x%x\nStatus: 0x%x\n",
1674 index + 1, frame->addr, frame->count, status);
1675 goto errrelfw;
1676 }
1677
1678 data = kmalloc(word_count * 2, GFP_KERNEL);
1679 if (data == NULL) {
1680 dev_err(&pdev->dev, "Card%d, firmware upload "
1681 "failed, not enough memory\n", index + 1);
1682 goto errrelfw;
1683 }
1684 inw(base);
1685 insw(base, data, word_count);
1686 InterruptTheCard(base);
1687
1688 for (a = 0; a < frame->count; a++)
1689 if (data[a] != frame->data[a]) {
1690 kfree(data);
1691 dev_err(&pdev->dev, "Card%d, firmware upload "
1692 "failed\n", index + 1);
1693 goto errrelfw;
1694 }
1695 kfree(data);
1696
1697 udelay(50); /* 0xf */
1698
1699 if (WaitTillCardIsFree(base))
1700 goto errrelfw;
1701
1702 if ((status = inw(base + 0x4)) != 0) {
1703 dev_err(&pdev->dev, "Card%d verify got out of sync. "
1704 "Card Status:0x%x\n", index + 1, status);
1705 goto errrelfw;
1706 }
1707 }
1708
1709 /* xfer ctrl */
1710 if (WaitTillCardIsFree(base))
1711 goto errrelfw;
1712
1713 outw(0xf2, base);
1714 outw(0x800, base);
1715 outw(0x0, base);
1716 outw(0x0, base);
1717 InterruptTheCard(base);
1718 outw(0x0, base + 0x4); /* for ISI4608 cards */
1719
1720 board->status |= FIRMWARE_LOADED;
1721 retval = 0;
1722
1723 errrelfw:
1724 release_firmware(fw);
1725 end:
1726 return retval;
1727 }
1728
1729 /*
1730 * Insmod can set static symbols so keep these static
1731 */
1732 static int card;
1733
1734 static int __devinit isicom_probe(struct pci_dev *pdev,
1735 const struct pci_device_id *ent)
1736 {
1737 unsigned int ioaddr, signature, index;
1738 int retval = -EPERM;
1739 u8 pciirq;
1740 struct isi_board *board = NULL;
1741
1742 if (card >= BOARD_COUNT)
1743 goto err;
1744
1745 ioaddr = pci_resource_start(pdev, 3);
1746 /* i.e at offset 0x1c in the PCI configuration register space. */
1747 pciirq = pdev->irq;
1748 dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1749
1750 /* allot the first empty slot in the array */
1751 for (index = 0; index < BOARD_COUNT; index++)
1752 if (isi_card[index].base == 0) {
1753 board = &isi_card[index];
1754 break;
1755 }
1756
1757 board->index = index;
1758 board->base = ioaddr;
1759 board->irq = pciirq;
1760 card++;
1761
1762 pci_set_drvdata(pdev, board);
1763
1764 retval = pci_request_region(pdev, 3, ISICOM_NAME);
1765 if (retval) {
1766 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1767 "will be disabled.\n", board->base, board->base + 15,
1768 index + 1);
1769 retval = -EBUSY;
1770 goto err;
1771 }
1772
1773 retval = request_irq(board->irq, isicom_interrupt,
1774 IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board);
1775 if (retval < 0) {
1776 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1777 "Card%d will be disabled.\n", board->irq, index + 1);
1778 goto errunrr;
1779 }
1780
1781 retval = reset_card(pdev, index, &signature);
1782 if (retval < 0)
1783 goto errunri;
1784
1785 retval = load_firmware(pdev, index, signature);
1786 if (retval < 0)
1787 goto errunri;
1788
1789 for (index = 0; index < board->port_count; index++)
1790 tty_register_device(isicom_normal, board->index * 16 + index,
1791 &pdev->dev);
1792
1793 return 0;
1794
1795 errunri:
1796 free_irq(board->irq, board);
1797 errunrr:
1798 pci_release_region(pdev, 3);
1799 err:
1800 board->base = 0;
1801 return retval;
1802 }
1803
1804 static void __devexit isicom_remove(struct pci_dev *pdev)
1805 {
1806 struct isi_board *board = pci_get_drvdata(pdev);
1807 unsigned int i;
1808
1809 for (i = 0; i < board->port_count; i++)
1810 tty_unregister_device(isicom_normal, board->index * 16 + i);
1811
1812 free_irq(board->irq, board);
1813 pci_release_region(pdev, 3);
1814 }
1815
1816 static int __init isicom_init(void)
1817 {
1818 int retval, idx, channel;
1819 struct isi_port *port;
1820
1821 card = 0;
1822
1823 for(idx = 0; idx < BOARD_COUNT; idx++) {
1824 port = &isi_ports[idx * 16];
1825 isi_card[idx].ports = port;
1826 spin_lock_init(&isi_card[idx].card_lock);
1827 for (channel = 0; channel < 16; channel++, port++) {
1828 port->magic = ISICOM_MAGIC;
1829 port->card = &isi_card[idx];
1830 port->channel = channel;
1831 port->close_delay = 50 * HZ/100;
1832 port->closing_wait = 3000 * HZ/100;
1833 port->status = 0;
1834 init_waitqueue_head(&port->open_wait);
1835 init_waitqueue_head(&port->close_wait);
1836 /* . . . */
1837 }
1838 isi_card[idx].base = 0;
1839 isi_card[idx].irq = 0;
1840 }
1841
1842 /* tty driver structure initialization */
1843 isicom_normal = alloc_tty_driver(PORT_COUNT);
1844 if (!isicom_normal) {
1845 retval = -ENOMEM;
1846 goto error;
1847 }
1848
1849 isicom_normal->owner = THIS_MODULE;
1850 isicom_normal->name = "ttyM";
1851 isicom_normal->major = ISICOM_NMAJOR;
1852 isicom_normal->minor_start = 0;
1853 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1854 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1855 isicom_normal->init_termios = tty_std_termios;
1856 isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
1857 CLOCAL;
1858 isicom_normal->flags = TTY_DRIVER_REAL_RAW |
1859 TTY_DRIVER_DYNAMIC_DEV;
1860 tty_set_operations(isicom_normal, &isicom_ops);
1861
1862 retval = tty_register_driver(isicom_normal);
1863 if (retval) {
1864 pr_dbg("Couldn't register the dialin driver\n");
1865 goto err_puttty;
1866 }
1867
1868 retval = pci_register_driver(&isicom_driver);
1869 if (retval < 0) {
1870 printk(KERN_ERR "ISICOM: Unable to register pci driver.\n");
1871 goto err_unrtty;
1872 }
1873
1874 mod_timer(&tx, jiffies + 1);
1875
1876 return 0;
1877 err_unrtty:
1878 tty_unregister_driver(isicom_normal);
1879 err_puttty:
1880 put_tty_driver(isicom_normal);
1881 error:
1882 return retval;
1883 }
1884
1885 static void __exit isicom_exit(void)
1886 {
1887 re_schedule = 0;
1888
1889 wait_for_completion_timeout(&isi_timerdone, HZ);
1890
1891 pci_unregister_driver(&isicom_driver);
1892 tty_unregister_driver(isicom_normal);
1893 put_tty_driver(isicom_normal);
1894 }
1895
1896 module_init(isicom_init);
1897 module_exit(isicom_exit);
1898
1899 MODULE_AUTHOR("MultiTech");
1900 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1901 MODULE_LICENSE("GPL");
kernel-based virtual machine