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tty/serial: lay the foundations for the next set of reworks
[deliverable/linux.git] / drivers / char / isicom.c
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 #define pr_dbg(str...) pr_debug("ISICOM: " str)
141 #ifdef DEBUG
142 #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
143 #else
144 #define isicom_paranoia_check(a, b, c) 0
145 #endif
146
147 static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
148 static void __devexit isicom_remove(struct pci_dev *);
149
150 static struct pci_device_id isicom_pci_tbl[] = {
151 { PCI_DEVICE(VENDOR_ID, 0x2028) },
152 { PCI_DEVICE(VENDOR_ID, 0x2051) },
153 { PCI_DEVICE(VENDOR_ID, 0x2052) },
154 { PCI_DEVICE(VENDOR_ID, 0x2053) },
155 { PCI_DEVICE(VENDOR_ID, 0x2054) },
156 { PCI_DEVICE(VENDOR_ID, 0x2055) },
157 { PCI_DEVICE(VENDOR_ID, 0x2056) },
158 { PCI_DEVICE(VENDOR_ID, 0x2057) },
159 { PCI_DEVICE(VENDOR_ID, 0x2058) },
160 { 0 }
161 };
162 MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
163
164 static struct pci_driver isicom_driver = {
165 .name = "isicom",
166 .id_table = isicom_pci_tbl,
167 .probe = isicom_probe,
168 .remove = __devexit_p(isicom_remove)
169 };
170
171 static int prev_card = 3; /* start servicing isi_card[0] */
172 static struct tty_driver *isicom_normal;
173
174 static void isicom_tx(unsigned long _data);
175 static void isicom_start(struct tty_struct *tty);
176
177 static DEFINE_TIMER(tx, isicom_tx, 0, 0);
178
179 /* baud index mappings from linux defns to isi */
180
181 static signed char linuxb_to_isib[] = {
182 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
183 };
184
185 struct isi_board {
186 unsigned long base;
187 int irq;
188 unsigned char port_count;
189 unsigned short status;
190 unsigned short port_status; /* each bit for each port */
191 unsigned short shift_count;
192 struct isi_port * ports;
193 signed char count;
194 spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
195 unsigned long flags;
196 unsigned int index;
197 };
198
199 struct isi_port {
200 unsigned short magic;
201 unsigned int flags;
202 int count;
203 int blocked_open;
204 int close_delay;
205 u16 channel;
206 u16 status;
207 u16 closing_wait;
208 struct isi_board * card;
209 struct tty_struct * tty;
210 wait_queue_head_t close_wait;
211 wait_queue_head_t open_wait;
212 unsigned char * xmit_buf;
213 int xmit_head;
214 int xmit_tail;
215 int xmit_cnt;
216 };
217
218 static struct isi_board isi_card[BOARD_COUNT];
219 static struct isi_port isi_ports[PORT_COUNT];
220
221 /*
222 * Locking functions for card level locking. We need to own both
223 * the kernel lock for the card and have the card in a position that
224 * it wants to talk.
225 */
226
227 static inline int WaitTillCardIsFree(unsigned long base)
228 {
229 unsigned int count = 0;
230 unsigned int a = in_atomic(); /* do we run under spinlock? */
231
232 while (!(inw(base + 0xe) & 0x1) && count++ < 100)
233 if (a)
234 mdelay(1);
235 else
236 msleep(1);
237
238 return !(inw(base + 0xe) & 0x1);
239 }
240
241 static int lock_card(struct isi_board *card)
242 {
243 unsigned long base = card->base;
244 unsigned int retries, a;
245
246 for (retries = 0; retries < 10; retries++) {
247 spin_lock_irqsave(&card->card_lock, card->flags);
248 for (a = 0; a < 10; a++) {
249 if (inw(base + 0xe) & 0x1)
250 return 1;
251 udelay(10);
252 }
253 spin_unlock_irqrestore(&card->card_lock, card->flags);
254 msleep(10);
255 }
256 printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n",
257 card->base);
258
259 return 0; /* Failed to acquire the card! */
260 }
261
262 static void unlock_card(struct isi_board *card)
263 {
264 spin_unlock_irqrestore(&card->card_lock, card->flags);
265 }
266
267 /*
268 * ISI Card specific ops ...
269 */
270
271 /* card->lock HAS to be held */
272 static void raise_dtr(struct isi_port *port)
273 {
274 struct isi_board *card = port->card;
275 unsigned long base = card->base;
276 u16 channel = port->channel;
277
278 if (WaitTillCardIsFree(base))
279 return;
280
281 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
282 outw(0x0504, base);
283 InterruptTheCard(base);
284 port->status |= ISI_DTR;
285 }
286
287 /* card->lock HAS to be held */
288 static inline void drop_dtr(struct isi_port *port)
289 {
290 struct isi_board *card = port->card;
291 unsigned long base = card->base;
292 u16 channel = port->channel;
293
294 if (WaitTillCardIsFree(base))
295 return;
296
297 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
298 outw(0x0404, base);
299 InterruptTheCard(base);
300 port->status &= ~ISI_DTR;
301 }
302
303 /* card->lock HAS to be held */
304 static inline void raise_rts(struct isi_port *port)
305 {
306 struct isi_board *card = port->card;
307 unsigned long base = card->base;
308 u16 channel = port->channel;
309
310 if (WaitTillCardIsFree(base))
311 return;
312
313 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
314 outw(0x0a04, base);
315 InterruptTheCard(base);
316 port->status |= ISI_RTS;
317 }
318
319 /* card->lock HAS to be held */
320 static inline void drop_rts(struct isi_port *port)
321 {
322 struct isi_board *card = port->card;
323 unsigned long base = card->base;
324 u16 channel = port->channel;
325
326 if (WaitTillCardIsFree(base))
327 return;
328
329 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
330 outw(0x0804, base);
331 InterruptTheCard(base);
332 port->status &= ~ISI_RTS;
333 }
334
335 /* card->lock MUST NOT be held */
336 static inline void raise_dtr_rts(struct isi_port *port)
337 {
338 struct isi_board *card = port->card;
339 unsigned long base = card->base;
340 u16 channel = port->channel;
341
342 if (!lock_card(card))
343 return;
344
345 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
346 outw(0x0f04, base);
347 InterruptTheCard(base);
348 port->status |= (ISI_DTR | ISI_RTS);
349 unlock_card(card);
350 }
351
352 /* card->lock HAS to be held */
353 static void drop_dtr_rts(struct isi_port *port)
354 {
355 struct isi_board *card = port->card;
356 unsigned long base = card->base;
357 u16 channel = port->channel;
358
359 if (WaitTillCardIsFree(base))
360 return;
361
362 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
363 outw(0x0c04, base);
364 InterruptTheCard(base);
365 port->status &= ~(ISI_RTS | ISI_DTR);
366 }
367
368 /*
369 * ISICOM Driver specific routines ...
370 *
371 */
372
373 static inline int __isicom_paranoia_check(struct isi_port const *port,
374 char *name, const char *routine)
375 {
376 if (!port) {
377 printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for "
378 "dev %s in %s.\n", name, routine);
379 return 1;
380 }
381 if (port->magic != ISICOM_MAGIC) {
382 printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for "
383 "dev %s in %s.\n", name, routine);
384 return 1;
385 }
386
387 return 0;
388 }
389
390 /*
391 * Transmitter.
392 *
393 * We shovel data into the card buffers on a regular basis. The card
394 * will do the rest of the work for us.
395 */
396
397 static void isicom_tx(unsigned long _data)
398 {
399 unsigned long flags, base;
400 unsigned int retries;
401 short count = (BOARD_COUNT-1), card;
402 short txcount, wrd, residue, word_count, cnt;
403 struct isi_port *port;
404 struct tty_struct *tty;
405
406 /* find next active board */
407 card = (prev_card + 1) & 0x0003;
408 while(count-- > 0) {
409 if (isi_card[card].status & BOARD_ACTIVE)
410 break;
411 card = (card + 1) & 0x0003;
412 }
413 if (!(isi_card[card].status & BOARD_ACTIVE))
414 goto sched_again;
415
416 prev_card = card;
417
418 count = isi_card[card].port_count;
419 port = isi_card[card].ports;
420 base = isi_card[card].base;
421
422 spin_lock_irqsave(&isi_card[card].card_lock, flags);
423 for (retries = 0; retries < 100; retries++) {
424 if (inw(base + 0xe) & 0x1)
425 break;
426 udelay(2);
427 }
428 if (retries >= 100)
429 goto unlock;
430
431 for (;count > 0;count--, port++) {
432 /* port not active or tx disabled to force flow control */
433 if (!(port->flags & ASYNC_INITIALIZED) ||
434 !(port->status & ISI_TXOK))
435 continue;
436
437 tty = port->tty;
438
439 if (tty == NULL)
440 continue;
441
442 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
443 if (txcount <= 0 || tty->stopped || tty->hw_stopped)
444 continue;
445
446 if (!(inw(base + 0x02) & (1 << port->channel)))
447 continue;
448
449 pr_dbg("txing %d bytes, port%d.\n", txcount,
450 port->channel + 1);
451 outw((port->channel << isi_card[card].shift_count) | txcount,
452 base);
453 residue = NO;
454 wrd = 0;
455 while (1) {
456 cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
457 - port->xmit_tail));
458 if (residue == YES) {
459 residue = NO;
460 if (cnt > 0) {
461 wrd |= (port->xmit_buf[port->xmit_tail]
462 << 8);
463 port->xmit_tail = (port->xmit_tail + 1)
464 & (SERIAL_XMIT_SIZE - 1);
465 port->xmit_cnt--;
466 txcount--;
467 cnt--;
468 outw(wrd, base);
469 } else {
470 outw(wrd, base);
471 break;
472 }
473 }
474 if (cnt <= 0) break;
475 word_count = cnt >> 1;
476 outsw(base, port->xmit_buf+port->xmit_tail,word_count);
477 port->xmit_tail = (port->xmit_tail
478 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
479 txcount -= (word_count << 1);
480 port->xmit_cnt -= (word_count << 1);
481 if (cnt & 0x0001) {
482 residue = YES;
483 wrd = port->xmit_buf[port->xmit_tail];
484 port->xmit_tail = (port->xmit_tail + 1)
485 & (SERIAL_XMIT_SIZE - 1);
486 port->xmit_cnt--;
487 txcount--;
488 }
489 }
490
491 InterruptTheCard(base);
492 if (port->xmit_cnt <= 0)
493 port->status &= ~ISI_TXOK;
494 if (port->xmit_cnt <= WAKEUP_CHARS)
495 tty_wakeup(tty);
496 }
497
498 unlock:
499 spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
500 /* schedule another tx for hopefully in about 10ms */
501 sched_again:
502 mod_timer(&tx, jiffies + msecs_to_jiffies(10));
503 }
504
505 /*
506 * Main interrupt handler routine
507 */
508
509 static irqreturn_t isicom_interrupt(int irq, void *dev_id)
510 {
511 struct isi_board *card = dev_id;
512 struct isi_port *port;
513 struct tty_struct *tty;
514 unsigned long base;
515 u16 header, word_count, count, channel;
516 short byte_count;
517 unsigned char *rp;
518
519 if (!card || !(card->status & FIRMWARE_LOADED))
520 return IRQ_NONE;
521
522 base = card->base;
523
524 /* did the card interrupt us? */
525 if (!(inw(base + 0x0e) & 0x02))
526 return IRQ_NONE;
527
528 spin_lock(&card->card_lock);
529
530 /*
531 * disable any interrupts from the PCI card and lower the
532 * interrupt line
533 */
534 outw(0x8000, base+0x04);
535 ClearInterrupt(base);
536
537 inw(base); /* get the dummy word out */
538 header = inw(base);
539 channel = (header & 0x7800) >> card->shift_count;
540 byte_count = header & 0xff;
541
542 if (channel + 1 > card->port_count) {
543 printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): "
544 "%d(channel) > port_count.\n", base, channel+1);
545 outw(0x0000, base+0x04); /* enable interrupts */
546 spin_unlock(&card->card_lock);
547 return IRQ_HANDLED;
548 }
549 port = card->ports + channel;
550 if (!(port->flags & ASYNC_INITIALIZED)) {
551 outw(0x0000, base+0x04); /* enable interrupts */
552 spin_unlock(&card->card_lock);
553 return IRQ_HANDLED;
554 }
555
556 tty = port->tty;
557 if (tty == NULL) {
558 word_count = byte_count >> 1;
559 while(byte_count > 1) {
560 inw(base);
561 byte_count -= 2;
562 }
563 if (byte_count & 0x01)
564 inw(base);
565 outw(0x0000, base+0x04); /* enable interrupts */
566 spin_unlock(&card->card_lock);
567 return IRQ_HANDLED;
568 }
569
570 if (header & 0x8000) { /* Status Packet */
571 header = inw(base);
572 switch(header & 0xff) {
573 case 0: /* Change in EIA signals */
574 if (port->flags & ASYNC_CHECK_CD) {
575 if (port->status & ISI_DCD) {
576 if (!(header & ISI_DCD)) {
577 /* Carrier has been lost */
578 pr_dbg("interrupt: DCD->low.\n"
579 );
580 port->status &= ~ISI_DCD;
581 tty_hangup(tty);
582 }
583 } else if (header & ISI_DCD) {
584 /* Carrier has been detected */
585 pr_dbg("interrupt: DCD->high.\n");
586 port->status |= ISI_DCD;
587 wake_up_interruptible(&port->open_wait);
588 }
589 } else {
590 if (header & ISI_DCD)
591 port->status |= ISI_DCD;
592 else
593 port->status &= ~ISI_DCD;
594 }
595
596 if (port->flags & ASYNC_CTS_FLOW) {
597 if (port->tty->hw_stopped) {
598 if (header & ISI_CTS) {
599 port->tty->hw_stopped = 0;
600 /* start tx ing */
601 port->status |= (ISI_TXOK
602 | ISI_CTS);
603 tty_wakeup(tty);
604 }
605 } else if (!(header & ISI_CTS)) {
606 port->tty->hw_stopped = 1;
607 /* stop tx ing */
608 port->status &= ~(ISI_TXOK | ISI_CTS);
609 }
610 } else {
611 if (header & ISI_CTS)
612 port->status |= ISI_CTS;
613 else
614 port->status &= ~ISI_CTS;
615 }
616
617 if (header & ISI_DSR)
618 port->status |= ISI_DSR;
619 else
620 port->status &= ~ISI_DSR;
621
622 if (header & ISI_RI)
623 port->status |= ISI_RI;
624 else
625 port->status &= ~ISI_RI;
626
627 break;
628
629 case 1: /* Received Break !!! */
630 tty_insert_flip_char(tty, 0, TTY_BREAK);
631 if (port->flags & ASYNC_SAK)
632 do_SAK(tty);
633 tty_flip_buffer_push(tty);
634 break;
635
636 case 2: /* Statistics */
637 pr_dbg("isicom_interrupt: stats!!!.\n");
638 break;
639
640 default:
641 pr_dbg("Intr: Unknown code in status packet.\n");
642 break;
643 }
644 } else { /* Data Packet */
645
646 count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
647 pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count);
648 word_count = count >> 1;
649 insw(base, rp, word_count);
650 byte_count -= (word_count << 1);
651 if (count & 0x0001) {
652 tty_insert_flip_char(tty, inw(base) & 0xff,
653 TTY_NORMAL);
654 byte_count -= 2;
655 }
656 if (byte_count > 0) {
657 pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping "
658 "bytes...\n", base, channel + 1);
659 while(byte_count > 0) { /* drain out unread xtra data */
660 inw(base);
661 byte_count -= 2;
662 }
663 }
664 tty_flip_buffer_push(tty);
665 }
666 outw(0x0000, base+0x04); /* enable interrupts */
667 spin_unlock(&card->card_lock);
668
669 return IRQ_HANDLED;
670 }
671
672 static void isicom_config_port(struct isi_port *port)
673 {
674 struct isi_board *card = port->card;
675 struct tty_struct *tty;
676 unsigned long baud;
677 unsigned long base = card->base;
678 u16 channel_setup, channel = port->channel,
679 shift_count = card->shift_count;
680 unsigned char flow_ctrl;
681
682 if (!(tty = port->tty) || !tty->termios)
683 return;
684 baud = C_BAUD(tty);
685 if (baud & CBAUDEX) {
686 baud &= ~CBAUDEX;
687
688 /* if CBAUDEX bit is on and the baud is set to either 50 or 75
689 * then the card is programmed for 57.6Kbps or 115Kbps
690 * respectively.
691 */
692
693 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
694 if (baud < 1 || baud > 4)
695 port->tty->termios->c_cflag &= ~CBAUDEX;
696 else
697 baud += 15;
698 }
699 if (baud == 15) {
700
701 /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
702 * by the set_serial_info ioctl ... this is done by
703 * the 'setserial' utility.
704 */
705
706 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
707 baud++; /* 57.6 Kbps */
708 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
709 baud +=2; /* 115 Kbps */
710 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
711 baud += 3; /* 230 kbps*/
712 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
713 baud += 4; /* 460 kbps*/
714 }
715 if (linuxb_to_isib[baud] == -1) {
716 /* hang up */
717 drop_dtr(port);
718 return;
719 }
720 else
721 raise_dtr(port);
722
723 if (WaitTillCardIsFree(base) == 0) {
724 outw(0x8000 | (channel << shift_count) |0x03, base);
725 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
726 channel_setup = 0;
727 switch(C_CSIZE(tty)) {
728 case CS5:
729 channel_setup |= ISICOM_CS5;
730 break;
731 case CS6:
732 channel_setup |= ISICOM_CS6;
733 break;
734 case CS7:
735 channel_setup |= ISICOM_CS7;
736 break;
737 case CS8:
738 channel_setup |= ISICOM_CS8;
739 break;
740 }
741
742 if (C_CSTOPB(tty))
743 channel_setup |= ISICOM_2SB;
744 if (C_PARENB(tty)) {
745 channel_setup |= ISICOM_EVPAR;
746 if (C_PARODD(tty))
747 channel_setup |= ISICOM_ODPAR;
748 }
749 outw(channel_setup, base);
750 InterruptTheCard(base);
751 }
752 if (C_CLOCAL(tty))
753 port->flags &= ~ASYNC_CHECK_CD;
754 else
755 port->flags |= ASYNC_CHECK_CD;
756
757 /* flow control settings ...*/
758 flow_ctrl = 0;
759 port->flags &= ~ASYNC_CTS_FLOW;
760 if (C_CRTSCTS(tty)) {
761 port->flags |= ASYNC_CTS_FLOW;
762 flow_ctrl |= ISICOM_CTSRTS;
763 }
764 if (I_IXON(tty))
765 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
766 if (I_IXOFF(tty))
767 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
768
769 if (WaitTillCardIsFree(base) == 0) {
770 outw(0x8000 | (channel << shift_count) |0x04, base);
771 outw(flow_ctrl << 8 | 0x05, base);
772 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
773 InterruptTheCard(base);
774 }
775
776 /* rx enabled -> enable port for rx on the card */
777 if (C_CREAD(tty)) {
778 card->port_status |= (1 << channel);
779 outw(card->port_status, base + 0x02);
780 }
781 }
782
783 /* open et all */
784
785 static inline void isicom_setup_board(struct isi_board *bp)
786 {
787 int channel;
788 struct isi_port *port;
789 unsigned long flags;
790
791 spin_lock_irqsave(&bp->card_lock, flags);
792 if (bp->status & BOARD_ACTIVE) {
793 spin_unlock_irqrestore(&bp->card_lock, flags);
794 return;
795 }
796 port = bp->ports;
797 bp->status |= BOARD_ACTIVE;
798 for (channel = 0; channel < bp->port_count; channel++, port++)
799 drop_dtr_rts(port);
800 spin_unlock_irqrestore(&bp->card_lock, flags);
801 }
802
803 static int isicom_setup_port(struct isi_port *port)
804 {
805 struct isi_board *card = port->card;
806 unsigned long flags;
807
808 if (port->flags & ASYNC_INITIALIZED) {
809 return 0;
810 }
811 if (!port->xmit_buf) {
812 unsigned long page;
813
814 if (!(page = get_zeroed_page(GFP_KERNEL)))
815 return -ENOMEM;
816
817 if (port->xmit_buf) {
818 free_page(page);
819 return -ERESTARTSYS;
820 }
821 port->xmit_buf = (unsigned char *) page;
822 }
823
824 spin_lock_irqsave(&card->card_lock, flags);
825 if (port->tty)
826 clear_bit(TTY_IO_ERROR, &port->tty->flags);
827 if (port->count == 1)
828 card->count++;
829
830 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
831
832 /* discard any residual data */
833 if (WaitTillCardIsFree(card->base) == 0) {
834 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
835 card->base);
836 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
837 InterruptTheCard(card->base);
838 }
839
840 isicom_config_port(port);
841 port->flags |= ASYNC_INITIALIZED;
842 spin_unlock_irqrestore(&card->card_lock, flags);
843
844 return 0;
845 }
846
847 static int block_til_ready(struct tty_struct *tty, struct file *filp,
848 struct isi_port *port)
849 {
850 struct isi_board *card = port->card;
851 int do_clocal = 0, retval;
852 unsigned long flags;
853 DECLARE_WAITQUEUE(wait, current);
854
855 /* block if port is in the process of being closed */
856
857 if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
858 pr_dbg("block_til_ready: close in progress.\n");
859 interruptible_sleep_on(&port->close_wait);
860 if (port->flags & ASYNC_HUP_NOTIFY)
861 return -EAGAIN;
862 else
863 return -ERESTARTSYS;
864 }
865
866 /* if non-blocking mode is set ... */
867
868 if ((filp->f_flags & O_NONBLOCK) ||
869 (tty->flags & (1 << TTY_IO_ERROR))) {
870 pr_dbg("block_til_ready: non-block mode.\n");
871 port->flags |= ASYNC_NORMAL_ACTIVE;
872 return 0;
873 }
874
875 if (C_CLOCAL(tty))
876 do_clocal = 1;
877
878 /* block waiting for DCD to be asserted, and while
879 callout dev is busy */
880 retval = 0;
881 add_wait_queue(&port->open_wait, &wait);
882
883 spin_lock_irqsave(&card->card_lock, flags);
884 if (!tty_hung_up_p(filp))
885 port->count--;
886 port->blocked_open++;
887 spin_unlock_irqrestore(&card->card_lock, flags);
888
889 while (1) {
890 raise_dtr_rts(port);
891
892 set_current_state(TASK_INTERRUPTIBLE);
893 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
894 if (port->flags & ASYNC_HUP_NOTIFY)
895 retval = -EAGAIN;
896 else
897 retval = -ERESTARTSYS;
898 break;
899 }
900 if (!(port->flags & ASYNC_CLOSING) &&
901 (do_clocal || (port->status & ISI_DCD))) {
902 break;
903 }
904 if (signal_pending(current)) {
905 retval = -ERESTARTSYS;
906 break;
907 }
908 schedule();
909 }
910 set_current_state(TASK_RUNNING);
911 remove_wait_queue(&port->open_wait, &wait);
912 spin_lock_irqsave(&card->card_lock, flags);
913 if (!tty_hung_up_p(filp))
914 port->count++;
915 port->blocked_open--;
916 spin_unlock_irqrestore(&card->card_lock, flags);
917 if (retval)
918 return retval;
919 port->flags |= ASYNC_NORMAL_ACTIVE;
920 return 0;
921 }
922
923 static int isicom_open(struct tty_struct *tty, struct file *filp)
924 {
925 struct isi_port *port;
926 struct isi_board *card;
927 unsigned int board;
928 int error, line;
929
930 line = tty->index;
931 if (line < 0 || line > PORT_COUNT-1)
932 return -ENODEV;
933 board = BOARD(line);
934 card = &isi_card[board];
935
936 if (!(card->status & FIRMWARE_LOADED))
937 return -ENODEV;
938
939 /* open on a port greater than the port count for the card !!! */
940 if (line > ((board * 16) + card->port_count - 1))
941 return -ENODEV;
942
943 port = &isi_ports[line];
944 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
945 return -ENODEV;
946
947 isicom_setup_board(card);
948
949 port->count++;
950 tty->driver_data = port;
951 port->tty = tty;
952 if ((error = isicom_setup_port(port))!=0)
953 return error;
954 if ((error = block_til_ready(tty, filp, port))!=0)
955 return error;
956
957 return 0;
958 }
959
960 /* close et all */
961
962 static inline void isicom_shutdown_board(struct isi_board *bp)
963 {
964 if (bp->status & BOARD_ACTIVE) {
965 bp->status &= ~BOARD_ACTIVE;
966 }
967 }
968
969 /* card->lock HAS to be held */
970 static void isicom_shutdown_port(struct isi_port *port)
971 {
972 struct isi_board *card = port->card;
973 struct tty_struct *tty;
974
975 tty = port->tty;
976
977 if (!(port->flags & ASYNC_INITIALIZED))
978 return;
979
980 if (port->xmit_buf) {
981 free_page((unsigned long) port->xmit_buf);
982 port->xmit_buf = NULL;
983 }
984 port->flags &= ~ASYNC_INITIALIZED;
985 /* 3rd October 2000 : Vinayak P Risbud */
986 port->tty = NULL;
987
988 /*Fix done by Anil .S on 30-04-2001
989 remote login through isi port has dtr toggle problem
990 due to which the carrier drops before the password prompt
991 appears on the remote end. Now we drop the dtr only if the
992 HUPCL(Hangup on close) flag is set for the tty*/
993
994 if (C_HUPCL(tty))
995 /* drop dtr on this port */
996 drop_dtr(port);
997
998 /* any other port uninits */
999 if (tty)
1000 set_bit(TTY_IO_ERROR, &tty->flags);
1001
1002 if (--card->count < 0) {
1003 pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n",
1004 card->base, card->count);
1005 card->count = 0;
1006 }
1007
1008 /* last port was closed, shutdown that boad too */
1009 if (C_HUPCL(tty)) {
1010 if (!card->count)
1011 isicom_shutdown_board(card);
1012 }
1013 }
1014
1015 static void isicom_flush_buffer(struct tty_struct *tty)
1016 {
1017 struct isi_port *port = tty->driver_data;
1018 struct isi_board *card = port->card;
1019 unsigned long flags;
1020
1021 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
1022 return;
1023
1024 spin_lock_irqsave(&card->card_lock, flags);
1025 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1026 spin_unlock_irqrestore(&card->card_lock, flags);
1027
1028 tty_wakeup(tty);
1029 }
1030
1031 static void isicom_close(struct tty_struct *tty, struct file *filp)
1032 {
1033 struct isi_port *port = tty->driver_data;
1034 struct isi_board *card;
1035 unsigned long flags;
1036
1037 if (!port)
1038 return;
1039 card = port->card;
1040 if (isicom_paranoia_check(port, tty->name, "isicom_close"))
1041 return;
1042
1043 pr_dbg("Close start!!!.\n");
1044
1045 spin_lock_irqsave(&card->card_lock, flags);
1046 if (tty_hung_up_p(filp)) {
1047 spin_unlock_irqrestore(&card->card_lock, flags);
1048 return;
1049 }
1050
1051 if (tty->count == 1 && port->count != 1) {
1052 printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
1053 "count tty->count = 1 port count = %d.\n",
1054 card->base, port->count);
1055 port->count = 1;
1056 }
1057 if (--port->count < 0) {
1058 printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
1059 "count for channel%d = %d", card->base, port->channel,
1060 port->count);
1061 port->count = 0;
1062 }
1063
1064 if (port->count) {
1065 spin_unlock_irqrestore(&card->card_lock, flags);
1066 return;
1067 }
1068 port->flags |= ASYNC_CLOSING;
1069 tty->closing = 1;
1070 spin_unlock_irqrestore(&card->card_lock, flags);
1071
1072 if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1073 tty_wait_until_sent(tty, port->closing_wait);
1074 /* indicate to the card that no more data can be received
1075 on this port */
1076 spin_lock_irqsave(&card->card_lock, flags);
1077 if (port->flags & ASYNC_INITIALIZED) {
1078 card->port_status &= ~(1 << port->channel);
1079 outw(card->port_status, card->base + 0x02);
1080 }
1081 isicom_shutdown_port(port);
1082 spin_unlock_irqrestore(&card->card_lock, flags);
1083
1084 isicom_flush_buffer(tty);
1085 tty_ldisc_flush(tty);
1086
1087 spin_lock_irqsave(&card->card_lock, flags);
1088 tty->closing = 0;
1089
1090 if (port->blocked_open) {
1091 spin_unlock_irqrestore(&card->card_lock, flags);
1092 if (port->close_delay) {
1093 pr_dbg("scheduling until time out.\n");
1094 msleep_interruptible(
1095 jiffies_to_msecs(port->close_delay));
1096 }
1097 spin_lock_irqsave(&card->card_lock, flags);
1098 wake_up_interruptible(&port->open_wait);
1099 }
1100 port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1101 wake_up_interruptible(&port->close_wait);
1102 spin_unlock_irqrestore(&card->card_lock, flags);
1103 }
1104
1105 /* write et all */
1106 static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
1107 int count)
1108 {
1109 struct isi_port *port = tty->driver_data;
1110 struct isi_board *card = port->card;
1111 unsigned long flags;
1112 int cnt, total = 0;
1113
1114 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
1115 return 0;
1116
1117 if (!port->xmit_buf)
1118 return 0;
1119
1120 spin_lock_irqsave(&card->card_lock, flags);
1121
1122 while(1) {
1123 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
1124 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
1125 if (cnt <= 0)
1126 break;
1127
1128 memcpy(port->xmit_buf + port->xmit_head, buf, cnt);
1129 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
1130 - 1);
1131 port->xmit_cnt += cnt;
1132 buf += cnt;
1133 count -= cnt;
1134 total += cnt;
1135 }
1136 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
1137 port->status |= ISI_TXOK;
1138 spin_unlock_irqrestore(&card->card_lock, flags);
1139 return total;
1140 }
1141
1142 /* put_char et all */
1143 static void isicom_put_char(struct tty_struct *tty, unsigned char ch)
1144 {
1145 struct isi_port *port = tty->driver_data;
1146 struct isi_board *card = port->card;
1147 unsigned long flags;
1148
1149 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
1150 return;
1151
1152 if (!port->xmit_buf)
1153 return;
1154
1155 spin_lock_irqsave(&card->card_lock, flags);
1156 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
1157 spin_unlock_irqrestore(&card->card_lock, flags);
1158 return;
1159 }
1160
1161 port->xmit_buf[port->xmit_head++] = ch;
1162 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
1163 port->xmit_cnt++;
1164 spin_unlock_irqrestore(&card->card_lock, flags);
1165 }
1166
1167 /* flush_chars et all */
1168 static void isicom_flush_chars(struct tty_struct *tty)
1169 {
1170 struct isi_port *port = tty->driver_data;
1171
1172 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1173 return;
1174
1175 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1176 !port->xmit_buf)
1177 return;
1178
1179 /* this tells the transmitter to consider this port for
1180 data output to the card ... that's the best we can do. */
1181 port->status |= ISI_TXOK;
1182 }
1183
1184 /* write_room et all */
1185 static int isicom_write_room(struct tty_struct *tty)
1186 {
1187 struct isi_port *port = tty->driver_data;
1188 int free;
1189
1190 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1191 return 0;
1192
1193 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1194 if (free < 0)
1195 free = 0;
1196 return free;
1197 }
1198
1199 /* chars_in_buffer et all */
1200 static int isicom_chars_in_buffer(struct tty_struct *tty)
1201 {
1202 struct isi_port *port = tty->driver_data;
1203 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1204 return 0;
1205 return port->xmit_cnt;
1206 }
1207
1208 /* ioctl et all */
1209 static inline void isicom_send_break(struct isi_port *port,
1210 unsigned long length)
1211 {
1212 struct isi_board *card = port->card;
1213 unsigned long base = card->base;
1214
1215 if (!lock_card(card))
1216 return;
1217
1218 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1219 outw((length & 0xff) << 8 | 0x00, base);
1220 outw((length & 0xff00), base);
1221 InterruptTheCard(base);
1222
1223 unlock_card(card);
1224 }
1225
1226 static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
1227 {
1228 struct isi_port *port = tty->driver_data;
1229 /* just send the port status */
1230 u16 status = port->status;
1231
1232 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1233 return -ENODEV;
1234
1235 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1236 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1237 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1238 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1239 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1240 ((status & ISI_RI ) ? TIOCM_RI : 0);
1241 }
1242
1243 static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
1244 unsigned int set, unsigned int clear)
1245 {
1246 struct isi_port *port = tty->driver_data;
1247 unsigned long flags;
1248
1249 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1250 return -ENODEV;
1251
1252 spin_lock_irqsave(&port->card->card_lock, flags);
1253 if (set & TIOCM_RTS)
1254 raise_rts(port);
1255 if (set & TIOCM_DTR)
1256 raise_dtr(port);
1257
1258 if (clear & TIOCM_RTS)
1259 drop_rts(port);
1260 if (clear & TIOCM_DTR)
1261 drop_dtr(port);
1262 spin_unlock_irqrestore(&port->card->card_lock, flags);
1263
1264 return 0;
1265 }
1266
1267 static int isicom_set_serial_info(struct isi_port *port,
1268 struct serial_struct __user *info)
1269 {
1270 struct serial_struct newinfo;
1271 int reconfig_port;
1272
1273 if (copy_from_user(&newinfo, info, sizeof(newinfo)))
1274 return -EFAULT;
1275
1276 lock_kernel();
1277
1278 reconfig_port = ((port->flags & ASYNC_SPD_MASK) !=
1279 (newinfo.flags & ASYNC_SPD_MASK));
1280
1281 if (!capable(CAP_SYS_ADMIN)) {
1282 if ((newinfo.close_delay != port->close_delay) ||
1283 (newinfo.closing_wait != port->closing_wait) ||
1284 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1285 (port->flags & ~ASYNC_USR_MASK))) {
1286 unlock_kernel();
1287 return -EPERM;
1288 }
1289 port->flags = ((port->flags & ~ ASYNC_USR_MASK) |
1290 (newinfo.flags & ASYNC_USR_MASK));
1291 }
1292 else {
1293 port->close_delay = newinfo.close_delay;
1294 port->closing_wait = newinfo.closing_wait;
1295 port->flags = ((port->flags & ~ASYNC_FLAGS) |
1296 (newinfo.flags & ASYNC_FLAGS));
1297 }
1298 if (reconfig_port) {
1299 unsigned long flags;
1300 spin_lock_irqsave(&port->card->card_lock, flags);
1301 isicom_config_port(port);
1302 spin_unlock_irqrestore(&port->card->card_lock, flags);
1303 }
1304 unlock_kernel();
1305 return 0;
1306 }
1307
1308 static int isicom_get_serial_info(struct isi_port *port,
1309 struct serial_struct __user *info)
1310 {
1311 struct serial_struct out_info;
1312
1313 lock_kernel();
1314 memset(&out_info, 0, sizeof(out_info));
1315 /* out_info.type = ? */
1316 out_info.line = port - isi_ports;
1317 out_info.port = port->card->base;
1318 out_info.irq = port->card->irq;
1319 out_info.flags = port->flags;
1320 /* out_info.baud_base = ? */
1321 out_info.close_delay = port->close_delay;
1322 out_info.closing_wait = port->closing_wait;
1323 unlock_kernel();
1324 if (copy_to_user(info, &out_info, sizeof(out_info)))
1325 return -EFAULT;
1326 return 0;
1327 }
1328
1329 static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
1330 unsigned int cmd, unsigned long arg)
1331 {
1332 struct isi_port *port = tty->driver_data;
1333 void __user *argp = (void __user *)arg;
1334 int retval;
1335
1336 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1337 return -ENODEV;
1338
1339 switch(cmd) {
1340 case TCSBRK:
1341 retval = tty_check_change(tty);
1342 if (retval)
1343 return retval;
1344 tty_wait_until_sent(tty, 0);
1345 if (!arg)
1346 isicom_send_break(port, HZ/4);
1347 return 0;
1348
1349 case TCSBRKP:
1350 retval = tty_check_change(tty);
1351 if (retval)
1352 return retval;
1353 tty_wait_until_sent(tty, 0);
1354 isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4);
1355 return 0;
1356 case TIOCGSERIAL:
1357 return isicom_get_serial_info(port, argp);
1358
1359 case TIOCSSERIAL:
1360 return isicom_set_serial_info(port, argp);
1361
1362 default:
1363 return -ENOIOCTLCMD;
1364 }
1365 return 0;
1366 }
1367
1368 /* set_termios et all */
1369 static void isicom_set_termios(struct tty_struct *tty,
1370 struct ktermios *old_termios)
1371 {
1372 struct isi_port *port = tty->driver_data;
1373 unsigned long flags;
1374
1375 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1376 return;
1377
1378 if (tty->termios->c_cflag == old_termios->c_cflag &&
1379 tty->termios->c_iflag == old_termios->c_iflag)
1380 return;
1381
1382 spin_lock_irqsave(&port->card->card_lock, flags);
1383 isicom_config_port(port);
1384 spin_unlock_irqrestore(&port->card->card_lock, flags);
1385
1386 if ((old_termios->c_cflag & CRTSCTS) &&
1387 !(tty->termios->c_cflag & CRTSCTS)) {
1388 tty->hw_stopped = 0;
1389 isicom_start(tty);
1390 }
1391 }
1392
1393 /* throttle et all */
1394 static void isicom_throttle(struct tty_struct *tty)
1395 {
1396 struct isi_port *port = tty->driver_data;
1397 struct isi_board *card = port->card;
1398
1399 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1400 return;
1401
1402 /* tell the card that this port cannot handle any more data for now */
1403 card->port_status &= ~(1 << port->channel);
1404 outw(card->port_status, card->base + 0x02);
1405 }
1406
1407 /* unthrottle et all */
1408 static void isicom_unthrottle(struct tty_struct *tty)
1409 {
1410 struct isi_port *port = tty->driver_data;
1411 struct isi_board *card = port->card;
1412
1413 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1414 return;
1415
1416 /* tell the card that this port is ready to accept more data */
1417 card->port_status |= (1 << port->channel);
1418 outw(card->port_status, card->base + 0x02);
1419 }
1420
1421 /* stop et all */
1422 static void isicom_stop(struct tty_struct *tty)
1423 {
1424 struct isi_port *port = tty->driver_data;
1425
1426 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1427 return;
1428
1429 /* this tells the transmitter not to consider this port for
1430 data output to the card. */
1431 port->status &= ~ISI_TXOK;
1432 }
1433
1434 /* start et all */
1435 static void isicom_start(struct tty_struct *tty)
1436 {
1437 struct isi_port *port = tty->driver_data;
1438
1439 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1440 return;
1441
1442 /* this tells the transmitter to consider this port for
1443 data output to the card. */
1444 port->status |= ISI_TXOK;
1445 }
1446
1447 static void isicom_hangup(struct tty_struct *tty)
1448 {
1449 struct isi_port *port = tty->driver_data;
1450 unsigned long flags;
1451
1452 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1453 return;
1454
1455 spin_lock_irqsave(&port->card->card_lock, flags);
1456 isicom_shutdown_port(port);
1457 spin_unlock_irqrestore(&port->card->card_lock, flags);
1458
1459 port->count = 0;
1460 port->flags &= ~ASYNC_NORMAL_ACTIVE;
1461 port->tty = NULL;
1462 wake_up_interruptible(&port->open_wait);
1463 }
1464
1465
1466 /*
1467 * Driver init and deinit functions
1468 */
1469
1470 static const struct tty_operations isicom_ops = {
1471 .open = isicom_open,
1472 .close = isicom_close,
1473 .write = isicom_write,
1474 .put_char = isicom_put_char,
1475 .flush_chars = isicom_flush_chars,
1476 .write_room = isicom_write_room,
1477 .chars_in_buffer = isicom_chars_in_buffer,
1478 .ioctl = isicom_ioctl,
1479 .set_termios = isicom_set_termios,
1480 .throttle = isicom_throttle,
1481 .unthrottle = isicom_unthrottle,
1482 .stop = isicom_stop,
1483 .start = isicom_start,
1484 .hangup = isicom_hangup,
1485 .flush_buffer = isicom_flush_buffer,
1486 .tiocmget = isicom_tiocmget,
1487 .tiocmset = isicom_tiocmset,
1488 };
1489
1490 static int __devinit reset_card(struct pci_dev *pdev,
1491 const unsigned int card, unsigned int *signature)
1492 {
1493 struct isi_board *board = pci_get_drvdata(pdev);
1494 unsigned long base = board->base;
1495 unsigned int sig, portcount = 0;
1496 int retval = 0;
1497
1498 dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1499 base);
1500
1501 inw(base + 0x8);
1502
1503 msleep(10);
1504
1505 outw(0, base + 0x8); /* Reset */
1506
1507 msleep(1000);
1508
1509 sig = inw(base + 0x4) & 0xff;
1510
1511 if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1512 sig != 0xee) {
1513 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1514 "bad I/O Port Address 0x%lx).\n", card + 1, base);
1515 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1516 retval = -EIO;
1517 goto end;
1518 }
1519
1520 msleep(10);
1521
1522 portcount = inw(base + 0x2);
1523 if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1524 portcount != 8 && portcount != 16)) {
1525 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1526 card + 1);
1527 retval = -EIO;
1528 goto end;
1529 }
1530
1531 switch (sig) {
1532 case 0xa5:
1533 case 0xbb:
1534 case 0xdd:
1535 board->port_count = (portcount == 4) ? 4 : 8;
1536 board->shift_count = 12;
1537 break;
1538 case 0xcc:
1539 case 0xee:
1540 board->port_count = 16;
1541 board->shift_count = 11;
1542 break;
1543 }
1544 dev_info(&pdev->dev, "-Done\n");
1545 *signature = sig;
1546
1547 end:
1548 return retval;
1549 }
1550
1551 static int __devinit load_firmware(struct pci_dev *pdev,
1552 const unsigned int index, const unsigned int signature)
1553 {
1554 struct isi_board *board = pci_get_drvdata(pdev);
1555 const struct firmware *fw;
1556 unsigned long base = board->base;
1557 unsigned int a;
1558 u16 word_count, status;
1559 int retval = -EIO;
1560 char *name;
1561 u8 *data;
1562
1563 struct stframe {
1564 u16 addr;
1565 u16 count;
1566 u8 data[0];
1567 } *frame;
1568
1569 switch (signature) {
1570 case 0xa5:
1571 name = "isi608.bin";
1572 break;
1573 case 0xbb:
1574 name = "isi608em.bin";
1575 break;
1576 case 0xcc:
1577 name = "isi616em.bin";
1578 break;
1579 case 0xdd:
1580 name = "isi4608.bin";
1581 break;
1582 case 0xee:
1583 name = "isi4616.bin";
1584 break;
1585 default:
1586 dev_err(&pdev->dev, "Unknown signature.\n");
1587 goto end;
1588 }
1589
1590 retval = request_firmware(&fw, name, &pdev->dev);
1591 if (retval)
1592 goto end;
1593
1594 retval = -EIO;
1595
1596 for (frame = (struct stframe *)fw->data;
1597 frame < (struct stframe *)(fw->data + fw->size);
1598 frame = (struct stframe *)((u8 *)(frame + 1) +
1599 frame->count)) {
1600 if (WaitTillCardIsFree(base))
1601 goto errrelfw;
1602
1603 outw(0xf0, base); /* start upload sequence */
1604 outw(0x00, base);
1605 outw(frame->addr, base); /* lsb of address */
1606
1607 word_count = frame->count / 2 + frame->count % 2;
1608 outw(word_count, base);
1609 InterruptTheCard(base);
1610
1611 udelay(100); /* 0x2f */
1612
1613 if (WaitTillCardIsFree(base))
1614 goto errrelfw;
1615
1616 if ((status = inw(base + 0x4)) != 0) {
1617 dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1618 KERN_WARNING "Address:0x%x\n"
1619 KERN_WARNING "Count:0x%x\n"
1620 KERN_WARNING "Status:0x%x\n",
1621 index + 1, frame->addr, frame->count, status);
1622 goto errrelfw;
1623 }
1624 outsw(base, frame->data, word_count);
1625
1626 InterruptTheCard(base);
1627
1628 udelay(50); /* 0x0f */
1629
1630 if (WaitTillCardIsFree(base))
1631 goto errrelfw;
1632
1633 if ((status = inw(base + 0x4)) != 0) {
1634 dev_err(&pdev->dev, "Card%d got out of sync.Card "
1635 "Status:0x%x\n", index + 1, status);
1636 goto errrelfw;
1637 }
1638 }
1639
1640 /* XXX: should we test it by reading it back and comparing with original like
1641 * in load firmware package? */
1642 for (frame = (struct stframe *)fw->data;
1643 frame < (struct stframe *)(fw->data + fw->size);
1644 frame = (struct stframe *)((u8 *)(frame + 1) +
1645 frame->count)) {
1646 if (WaitTillCardIsFree(base))
1647 goto errrelfw;
1648
1649 outw(0xf1, base); /* start download sequence */
1650 outw(0x00, base);
1651 outw(frame->addr, base); /* lsb of address */
1652
1653 word_count = (frame->count >> 1) + frame->count % 2;
1654 outw(word_count + 1, base);
1655 InterruptTheCard(base);
1656
1657 udelay(50); /* 0xf */
1658
1659 if (WaitTillCardIsFree(base))
1660 goto errrelfw;
1661
1662 if ((status = inw(base + 0x4)) != 0) {
1663 dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1664 KERN_WARNING "Address:0x%x\n"
1665 KERN_WARNING "Count:0x%x\n"
1666 KERN_WARNING "Status: 0x%x\n",
1667 index + 1, frame->addr, frame->count, status);
1668 goto errrelfw;
1669 }
1670
1671 data = kmalloc(word_count * 2, GFP_KERNEL);
1672 if (data == NULL) {
1673 dev_err(&pdev->dev, "Card%d, firmware upload "
1674 "failed, not enough memory\n", index + 1);
1675 goto errrelfw;
1676 }
1677 inw(base);
1678 insw(base, data, word_count);
1679 InterruptTheCard(base);
1680
1681 for (a = 0; a < frame->count; a++)
1682 if (data[a] != frame->data[a]) {
1683 kfree(data);
1684 dev_err(&pdev->dev, "Card%d, firmware upload "
1685 "failed\n", index + 1);
1686 goto errrelfw;
1687 }
1688 kfree(data);
1689
1690 udelay(50); /* 0xf */
1691
1692 if (WaitTillCardIsFree(base))
1693 goto errrelfw;
1694
1695 if ((status = inw(base + 0x4)) != 0) {
1696 dev_err(&pdev->dev, "Card%d verify got out of sync. "
1697 "Card Status:0x%x\n", index + 1, status);
1698 goto errrelfw;
1699 }
1700 }
1701
1702 /* xfer ctrl */
1703 if (WaitTillCardIsFree(base))
1704 goto errrelfw;
1705
1706 outw(0xf2, base);
1707 outw(0x800, base);
1708 outw(0x0, base);
1709 outw(0x0, base);
1710 InterruptTheCard(base);
1711 outw(0x0, base + 0x4); /* for ISI4608 cards */
1712
1713 board->status |= FIRMWARE_LOADED;
1714 retval = 0;
1715
1716 errrelfw:
1717 release_firmware(fw);
1718 end:
1719 return retval;
1720 }
1721
1722 /*
1723 * Insmod can set static symbols so keep these static
1724 */
1725 static unsigned int card_count;
1726
1727 static int __devinit isicom_probe(struct pci_dev *pdev,
1728 const struct pci_device_id *ent)
1729 {
1730 unsigned int signature, index;
1731 int retval = -EPERM;
1732 struct isi_board *board = NULL;
1733
1734 if (card_count >= BOARD_COUNT)
1735 goto err;
1736
1737 dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1738
1739 /* allot the first empty slot in the array */
1740 for (index = 0; index < BOARD_COUNT; index++)
1741 if (isi_card[index].base == 0) {
1742 board = &isi_card[index];
1743 break;
1744 }
1745
1746 board->index = index;
1747 board->base = pci_resource_start(pdev, 3);
1748 board->irq = pdev->irq;
1749 card_count++;
1750
1751 pci_set_drvdata(pdev, board);
1752
1753 retval = pci_request_region(pdev, 3, ISICOM_NAME);
1754 if (retval) {
1755 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1756 "will be disabled.\n", board->base, board->base + 15,
1757 index + 1);
1758 retval = -EBUSY;
1759 goto errdec;
1760 }
1761
1762 retval = request_irq(board->irq, isicom_interrupt,
1763 IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board);
1764 if (retval < 0) {
1765 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1766 "Card%d will be disabled.\n", board->irq, index + 1);
1767 goto errunrr;
1768 }
1769
1770 retval = reset_card(pdev, index, &signature);
1771 if (retval < 0)
1772 goto errunri;
1773
1774 retval = load_firmware(pdev, index, signature);
1775 if (retval < 0)
1776 goto errunri;
1777
1778 for (index = 0; index < board->port_count; index++)
1779 tty_register_device(isicom_normal, board->index * 16 + index,
1780 &pdev->dev);
1781
1782 return 0;
1783
1784 errunri:
1785 free_irq(board->irq, board);
1786 errunrr:
1787 pci_release_region(pdev, 3);
1788 errdec:
1789 board->base = 0;
1790 card_count--;
1791 err:
1792 return retval;
1793 }
1794
1795 static void __devexit isicom_remove(struct pci_dev *pdev)
1796 {
1797 struct isi_board *board = pci_get_drvdata(pdev);
1798 unsigned int i;
1799
1800 for (i = 0; i < board->port_count; i++)
1801 tty_unregister_device(isicom_normal, board->index * 16 + i);
1802
1803 free_irq(board->irq, board);
1804 pci_release_region(pdev, 3);
1805 board->base = 0;
1806 card_count--;
1807 }
1808
1809 static int __init isicom_init(void)
1810 {
1811 int retval, idx, channel;
1812 struct isi_port *port;
1813
1814 for(idx = 0; idx < BOARD_COUNT; idx++) {
1815 port = &isi_ports[idx * 16];
1816 isi_card[idx].ports = port;
1817 spin_lock_init(&isi_card[idx].card_lock);
1818 for (channel = 0; channel < 16; channel++, port++) {
1819 port->magic = ISICOM_MAGIC;
1820 port->card = &isi_card[idx];
1821 port->channel = channel;
1822 port->close_delay = 50 * HZ/100;
1823 port->closing_wait = 3000 * HZ/100;
1824 port->status = 0;
1825 init_waitqueue_head(&port->open_wait);
1826 init_waitqueue_head(&port->close_wait);
1827 /* . . . */
1828 }
1829 isi_card[idx].base = 0;
1830 isi_card[idx].irq = 0;
1831 }
1832
1833 /* tty driver structure initialization */
1834 isicom_normal = alloc_tty_driver(PORT_COUNT);
1835 if (!isicom_normal) {
1836 retval = -ENOMEM;
1837 goto error;
1838 }
1839
1840 isicom_normal->owner = THIS_MODULE;
1841 isicom_normal->name = "ttyM";
1842 isicom_normal->major = ISICOM_NMAJOR;
1843 isicom_normal->minor_start = 0;
1844 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1845 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1846 isicom_normal->init_termios = tty_std_termios;
1847 isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
1848 CLOCAL;
1849 isicom_normal->flags = TTY_DRIVER_REAL_RAW |
1850 TTY_DRIVER_DYNAMIC_DEV;
1851 tty_set_operations(isicom_normal, &isicom_ops);
1852
1853 retval = tty_register_driver(isicom_normal);
1854 if (retval) {
1855 pr_dbg("Couldn't register the dialin driver\n");
1856 goto err_puttty;
1857 }
1858
1859 retval = pci_register_driver(&isicom_driver);
1860 if (retval < 0) {
1861 printk(KERN_ERR "ISICOM: Unable to register pci driver.\n");
1862 goto err_unrtty;
1863 }
1864
1865 mod_timer(&tx, jiffies + 1);
1866
1867 return 0;
1868 err_unrtty:
1869 tty_unregister_driver(isicom_normal);
1870 err_puttty:
1871 put_tty_driver(isicom_normal);
1872 error:
1873 return retval;
1874 }
1875
1876 static void __exit isicom_exit(void)
1877 {
1878 del_timer_sync(&tx);
1879
1880 pci_unregister_driver(&isicom_driver);
1881 tty_unregister_driver(isicom_normal);
1882 put_tty_driver(isicom_normal);
1883 }
1884
1885 module_init(isicom_init);
1886 module_exit(isicom_exit);
1887
1888 MODULE_AUTHOR("MultiTech");
1889 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1890 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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