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ftrace: avoid double-free of dyn_ftrace
[linux-2.6/mini2440.git] / drivers / char / isicom.c
blob24aa6e88e223d5772649182d878342224749c3c1
1 /*
2 * This program is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU General Public License
4 * as published by the Free Software Foundation; either version
5 * 2 of the License, or (at your option) any later version.
6 *
7 * Original driver code supplied by Multi-Tech
8 *
9 * Changes
10 * 1/9/98 alan@lxorguk.ukuu.org.uk
11 * Merge to 2.0.x kernel tree
12 * Obtain and use official major/minors
13 * Loader switched to a misc device
14 * (fixed range check bug as a side effect)
15 * Printk clean up
16 * 9/12/98 alan@lxorguk.ukuu.org.uk
17 * Rough port to 2.1.x
18 *
19 * 10/6/99 sameer Merged the ISA and PCI drivers to
20 * a new unified driver.
21 *
22 * 3/9/99 sameer Added support for ISI4616 cards.
23 *
24 * 16/9/99 sameer We do not force RTS low anymore.
25 * This is to prevent the firmware
26 * from getting confused.
27 *
28 * 26/10/99 sameer Cosmetic changes:The driver now
29 * dumps the Port Count information
30 * along with I/O address and IRQ.
31 *
32 * 13/12/99 sameer Fixed the problem with IRQ sharing.
33 *
34 * 10/5/00 sameer Fixed isicom_shutdown_board()
35 * to not lower DTR on all the ports
36 * when the last port on the card is
37 * closed.
38 *
39 * 10/5/00 sameer Signal mask setup command added
40 * to isicom_setup_port and
41 * isicom_shutdown_port.
42 *
43 * 24/5/00 sameer The driver is now SMP aware.
44 *
45 *
46 * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem
47 *
48 *
49 * 03/01/01 anil .s Added support for resetting the
50 * internal modems on ISI cards.
51 *
52 * 08/02/01 anil .s Upgraded the driver for kernel
53 * 2.4.x
54 *
55 * 11/04/01 Kevin Fixed firmware load problem with
56 * ISIHP-4X card
57 *
58 * 30/04/01 anil .s Fixed the remote login through
59 * ISI port problem. Now the link
60 * does not go down before password
61 * prompt.
62 *
63 * 03/05/01 anil .s Fixed the problem with IRQ sharing
64 * among ISI-PCI cards.
65 *
66 * 03/05/01 anil .s Added support to display the version
67 * info during insmod as well as module
68 * listing by lsmod.
69 *
70 * 10/05/01 anil .s Done the modifications to the source
71 * file and Install script so that the
72 * same installation can be used for
73 * 2.2.x and 2.4.x kernel.
74 *
75 * 06/06/01 anil .s Now we drop both dtr and rts during
76 * shutdown_port as well as raise them
77 * during isicom_config_port.
78 *
79 * 09/06/01 acme@conectiva.com.br use capable, not suser, do
80 * restore_flags on failure in
81 * isicom_send_break, verify put_user
82 * result
83 *
84 * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps
85 * Baud index extended to 21
86 *
87 * 20/03/03 ranjeeth Made to work for Linux Advanced server.
88 * Taken care of license warning.
89 *
90 * 10/12/03 Ravindra Made to work for Fedora Core 1 of
91 * Red Hat Distribution
92 *
93 * 06/01/05 Alan Cox Merged the ISI and base kernel strands
94 * into a single 2.6 driver
95 *
96 * ***********************************************************
97 *
98 * To use this driver you also need the support package. You
99 * can find this in RPM format on
100 * ftp://ftp.linux.org.uk/pub/linux/alan
101 *
102 * You can find the original tools for this direct from Multitech
103 * ftp://ftp.multitech.com/ISI-Cards/
104 *
105 * Having installed the cards the module options (/etc/modprobe.conf)
106 *
107 * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4
108 *
109 * Omit those entries for boards you don't have installed.
110 *
111 * TODO
112 * Merge testing
113 * 64-bit verification
114 */
115
116 #include <linux/module.h>
117 #include <linux/firmware.h>
118 #include <linux/kernel.h>
119 #include <linux/tty.h>
120 #include <linux/tty_flip.h>
121 #include <linux/termios.h>
122 #include <linux/fs.h>
123 #include <linux/sched.h>
124 #include <linux/serial.h>
125 #include <linux/mm.h>
126 #include <linux/interrupt.h>
127 #include <linux/timer.h>
128 #include <linux/delay.h>
129 #include <linux/ioport.h>
130
131 #include <linux/uaccess.h>
132 #include <linux/io.h>
133 #include <asm/system.h>
134
135 #include <linux/pci.h>
136
137 #include <linux/isicom.h>
138
139 #define InterruptTheCard(base) outw(0, (base) + 0xc)
140 #define ClearInterrupt(base) inw((base) + 0x0a)
141
142 #define pr_dbg(str...) pr_debug("ISICOM: " str)
143 #ifdef DEBUG
144 #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
145 #else
146 #define isicom_paranoia_check(a, b, c) 0
147 #endif
148
149 static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
150 static void __devexit isicom_remove(struct pci_dev *);
151
152 static struct pci_device_id isicom_pci_tbl[] = {
153 { PCI_DEVICE(VENDOR_ID, 0x2028) },
154 { PCI_DEVICE(VENDOR_ID, 0x2051) },
155 { PCI_DEVICE(VENDOR_ID, 0x2052) },
156 { PCI_DEVICE(VENDOR_ID, 0x2053) },
157 { PCI_DEVICE(VENDOR_ID, 0x2054) },
158 { PCI_DEVICE(VENDOR_ID, 0x2055) },
159 { PCI_DEVICE(VENDOR_ID, 0x2056) },
160 { PCI_DEVICE(VENDOR_ID, 0x2057) },
161 { PCI_DEVICE(VENDOR_ID, 0x2058) },
162 { 0 }
163 };
164 MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
165
166 static struct pci_driver isicom_driver = {
167 .name = "isicom",
168 .id_table = isicom_pci_tbl,
169 .probe = isicom_probe,
170 .remove = __devexit_p(isicom_remove)
171 };
172
173 static int prev_card = 3; /* start servicing isi_card[0] */
174 static struct tty_driver *isicom_normal;
175
176 static void isicom_tx(unsigned long _data);
177 static void isicom_start(struct tty_struct *tty);
178
179 static DEFINE_TIMER(tx, isicom_tx, 0, 0);
180
181 /* baud index mappings from linux defns to isi */
182
183 static signed char linuxb_to_isib[] = {
184 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
185 };
186
187 struct isi_board {
188 unsigned long base;
189 int irq;
190 unsigned char port_count;
191 unsigned short status;
192 unsigned short port_status; /* each bit for each port */
193 unsigned short shift_count;
194 struct isi_port *ports;
195 signed char count;
196 spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
197 unsigned long flags;
198 unsigned int index;
199 };
200
201 struct isi_port {
202 unsigned short magic;
203 struct tty_port port;
204 u16 channel;
205 u16 status;
206 struct isi_board *card;
207 unsigned char *xmit_buf;
208 int xmit_head;
209 int xmit_tail;
210 int xmit_cnt;
211 };
212
213 static struct isi_board isi_card[BOARD_COUNT];
214 static struct isi_port isi_ports[PORT_COUNT];
215
216 /*
217 * Locking functions for card level locking. We need to own both
218 * the kernel lock for the card and have the card in a position that
219 * it wants to talk.
220 */
221
222 static inline int WaitTillCardIsFree(unsigned long base)
223 {
224 unsigned int count = 0;
225 unsigned int a = in_atomic(); /* do we run under spinlock? */
226
227 while (!(inw(base + 0xe) & 0x1) && count++ < 100)
228 if (a)
229 mdelay(1);
230 else
231 msleep(1);
232
233 return !(inw(base + 0xe) & 0x1);
234 }
235
236 static int lock_card(struct isi_board *card)
237 {
238 unsigned long base = card->base;
239 unsigned int retries, a;
240
241 for (retries = 0; retries < 10; retries++) {
242 spin_lock_irqsave(&card->card_lock, card->flags);
243 for (a = 0; a < 10; a++) {
244 if (inw(base + 0xe) & 0x1)
245 return 1;
246 udelay(10);
247 }
248 spin_unlock_irqrestore(&card->card_lock, card->flags);
249 msleep(10);
250 }
251 printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n",
252 card->base);
253
254 return 0; /* Failed to acquire the card! */
255 }
256
257 static void unlock_card(struct isi_board *card)
258 {
259 spin_unlock_irqrestore(&card->card_lock, card->flags);
260 }
261
262 /*
263 * ISI Card specific ops ...
264 */
265
266 /* card->lock HAS to be held */
267 static void raise_dtr(struct isi_port *port)
268 {
269 struct isi_board *card = port->card;
270 unsigned long base = card->base;
271 u16 channel = port->channel;
272
273 if (WaitTillCardIsFree(base))
274 return;
275
276 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
277 outw(0x0504, base);
278 InterruptTheCard(base);
279 port->status |= ISI_DTR;
280 }
281
282 /* card->lock HAS to be held */
283 static inline void drop_dtr(struct isi_port *port)
284 {
285 struct isi_board *card = port->card;
286 unsigned long base = card->base;
287 u16 channel = port->channel;
288
289 if (WaitTillCardIsFree(base))
290 return;
291
292 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
293 outw(0x0404, base);
294 InterruptTheCard(base);
295 port->status &= ~ISI_DTR;
296 }
297
298 /* card->lock HAS to be held */
299 static inline void raise_rts(struct isi_port *port)
300 {
301 struct isi_board *card = port->card;
302 unsigned long base = card->base;
303 u16 channel = port->channel;
304
305 if (WaitTillCardIsFree(base))
306 return;
307
308 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
309 outw(0x0a04, base);
310 InterruptTheCard(base);
311 port->status |= ISI_RTS;
312 }
313
314 /* card->lock HAS to be held */
315 static inline void drop_rts(struct isi_port *port)
316 {
317 struct isi_board *card = port->card;
318 unsigned long base = card->base;
319 u16 channel = port->channel;
320
321 if (WaitTillCardIsFree(base))
322 return;
323
324 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
325 outw(0x0804, base);
326 InterruptTheCard(base);
327 port->status &= ~ISI_RTS;
328 }
329
330 /* card->lock MUST NOT be held */
331
332 static void isicom_raise_dtr_rts(struct tty_port *port)
333 {
334 struct isi_port *ip = container_of(port, struct isi_port, port);
335 struct isi_board *card = ip->card;
336 unsigned long base = card->base;
337 u16 channel = ip->channel;
338
339 if (!lock_card(card))
340 return;
341
342 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
343 outw(0x0f04, base);
344 InterruptTheCard(base);
345 ip->status |= (ISI_DTR | ISI_RTS);
346 unlock_card(card);
347 }
348
349 /* card->lock HAS to be held */
350 static void drop_dtr_rts(struct isi_port *port)
351 {
352 struct isi_board *card = port->card;
353 unsigned long base = card->base;
354 u16 channel = port->channel;
355
356 if (WaitTillCardIsFree(base))
357 return;
358
359 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
360 outw(0x0c04, base);
361 InterruptTheCard(base);
362 port->status &= ~(ISI_RTS | ISI_DTR);
363 }
364
365 /*
366 * ISICOM Driver specific routines ...
367 *
368 */
369
370 static inline int __isicom_paranoia_check(struct isi_port const *port,
371 char *name, const char *routine)
372 {
373 if (!port) {
374 printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for "
375 "dev %s in %s.\n", name, routine);
376 return 1;
377 }
378 if (port->magic != ISICOM_MAGIC) {
379 printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for "
380 "dev %s in %s.\n", name, routine);
381 return 1;
382 }
383
384 return 0;
385 }
386
387 /*
388 * Transmitter.
389 *
390 * We shovel data into the card buffers on a regular basis. The card
391 * will do the rest of the work for us.
392 */
393
394 static void isicom_tx(unsigned long _data)
395 {
396 unsigned long flags, base;
397 unsigned int retries;
398 short count = (BOARD_COUNT-1), card;
399 short txcount, wrd, residue, word_count, cnt;
400 struct isi_port *port;
401 struct tty_struct *tty;
402
403 /* find next active board */
404 card = (prev_card + 1) & 0x0003;
405 while (count-- > 0) {
406 if (isi_card[card].status & BOARD_ACTIVE)
407 break;
408 card = (card + 1) & 0x0003;
409 }
410 if (!(isi_card[card].status & BOARD_ACTIVE))
411 goto sched_again;
412
413 prev_card = card;
414
415 count = isi_card[card].port_count;
416 port = isi_card[card].ports;
417 base = isi_card[card].base;
418
419 spin_lock_irqsave(&isi_card[card].card_lock, flags);
420 for (retries = 0; retries < 100; retries++) {
421 if (inw(base + 0xe) & 0x1)
422 break;
423 udelay(2);
424 }
425 if (retries >= 100)
426 goto unlock;
427
428 tty = tty_port_tty_get(&port->port);
429 if (tty == NULL)
430 goto put_unlock;
431
432 for (; count > 0; count--, port++) {
433 /* port not active or tx disabled to force flow control */
434 if (!(port->port.flags & ASYNC_INITIALIZED) ||
435 !(port->status & ISI_TXOK))
436 continue;
437
438 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
439 if (txcount <= 0 || tty->stopped || tty->hw_stopped)
440 continue;
441
442 if (!(inw(base + 0x02) & (1 << port->channel)))
443 continue;
444
445 pr_dbg("txing %d bytes, port%d.\n", txcount,
446 port->channel + 1);
447 outw((port->channel << isi_card[card].shift_count) | txcount,
448 base);
449 residue = NO;
450 wrd = 0;
451 while (1) {
452 cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
453 - port->xmit_tail));
454 if (residue == YES) {
455 residue = NO;
456 if (cnt > 0) {
457 wrd |= (port->port.xmit_buf[port->xmit_tail]
458 << 8);
459 port->xmit_tail = (port->xmit_tail + 1)
460 & (SERIAL_XMIT_SIZE - 1);
461 port->xmit_cnt--;
462 txcount--;
463 cnt--;
464 outw(wrd, base);
465 } else {
466 outw(wrd, base);
467 break;
468 }
469 }
470 if (cnt <= 0)
471 break;
472 word_count = cnt >> 1;
473 outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
474 port->xmit_tail = (port->xmit_tail
475 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
476 txcount -= (word_count << 1);
477 port->xmit_cnt -= (word_count << 1);
478 if (cnt & 0x0001) {
479 residue = YES;
480 wrd = port->port.xmit_buf[port->xmit_tail];
481 port->xmit_tail = (port->xmit_tail + 1)
482 & (SERIAL_XMIT_SIZE - 1);
483 port->xmit_cnt--;
484 txcount--;
485 }
486 }
487
488 InterruptTheCard(base);
489 if (port->xmit_cnt <= 0)
490 port->status &= ~ISI_TXOK;
491 if (port->xmit_cnt <= WAKEUP_CHARS)
492 tty_wakeup(tty);
493 }
494
495 put_unlock:
496 tty_kref_put(tty);
497 unlock:
498 spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
499 /* schedule another tx for hopefully in about 10ms */
500 sched_again:
501 mod_timer(&tx, jiffies + msecs_to_jiffies(10));
502 }
503
504 /*
505 * Main interrupt handler routine
506 */
507
508 static irqreturn_t isicom_interrupt(int irq, void *dev_id)
509 {
510 struct isi_board *card = dev_id;
511 struct isi_port *port;
512 struct tty_struct *tty;
513 unsigned long base;
514 u16 header, word_count, count, channel;
515 short byte_count;
516 unsigned char *rp;
517
518 if (!card || !(card->status & FIRMWARE_LOADED))
519 return IRQ_NONE;
520
521 base = card->base;
522
523 /* did the card interrupt us? */
524 if (!(inw(base + 0x0e) & 0x02))
525 return IRQ_NONE;
526
527 spin_lock(&card->card_lock);
528
529 /*
530 * disable any interrupts from the PCI card and lower the
531 * interrupt line
532 */
533 outw(0x8000, base+0x04);
534 ClearInterrupt(base);
535
536 inw(base); /* get the dummy word out */
537 header = inw(base);
538 channel = (header & 0x7800) >> card->shift_count;
539 byte_count = header & 0xff;
540
541 if (channel + 1 > card->port_count) {
542 printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): "
543 "%d(channel) > port_count.\n", base, channel+1);
544 outw(0x0000, base+0x04); /* enable interrupts */
545 spin_unlock(&card->card_lock);
546 return IRQ_HANDLED;
547 }
548 port = card->ports + channel;
549 if (!(port->port.flags & ASYNC_INITIALIZED)) {
550 outw(0x0000, base+0x04); /* enable interrupts */
551 spin_unlock(&card->card_lock);
552 return IRQ_HANDLED;
553 }
554
555 tty = tty_port_tty_get(&port->port);
556 if (tty == NULL) {
557 word_count = byte_count >> 1;
558 while (byte_count > 1) {
559 inw(base);
560 byte_count -= 2;
561 }
562 if (byte_count & 0x01)
563 inw(base);
564 outw(0x0000, base+0x04); /* enable interrupts */
565 spin_unlock(&card->card_lock);
566 return IRQ_HANDLED;
567 }
568
569 if (header & 0x8000) { /* Status Packet */
570 header = inw(base);
571 switch (header & 0xff) {
572 case 0: /* Change in EIA signals */
573 if (port->port.flags & ASYNC_CHECK_CD) {
574 if (port->status & ISI_DCD) {
575 if (!(header & ISI_DCD)) {
576 /* Carrier has been lost */
577 pr_dbg("interrupt: DCD->low.\n"
578 );
579 port->status &= ~ISI_DCD;
580 tty_hangup(tty);
581 }
582 } else if (header & ISI_DCD) {
583 /* Carrier has been detected */
584 pr_dbg("interrupt: DCD->high.\n");
585 port->status |= ISI_DCD;
586 wake_up_interruptible(&port->port.open_wait);
587 }
588 } else {
589 if (header & ISI_DCD)
590 port->status |= ISI_DCD;
591 else
592 port->status &= ~ISI_DCD;
593 }
594
595 if (port->port.flags & ASYNC_CTS_FLOW) {
596 if (tty->hw_stopped) {
597 if (header & ISI_CTS) {
598 port->port.tty->hw_stopped = 0;
599 /* start tx ing */
600 port->status |= (ISI_TXOK
601 | ISI_CTS);
602 tty_wakeup(tty);
603 }
604 } else if (!(header & ISI_CTS)) {
605 tty->hw_stopped = 1;
606 /* stop tx ing */
607 port->status &= ~(ISI_TXOK | ISI_CTS);
608 }
609 } else {
610 if (header & ISI_CTS)
611 port->status |= ISI_CTS;
612 else
613 port->status &= ~ISI_CTS;
614 }
615
616 if (header & ISI_DSR)
617 port->status |= ISI_DSR;
618 else
619 port->status &= ~ISI_DSR;
620
621 if (header & ISI_RI)
622 port->status |= ISI_RI;
623 else
624 port->status &= ~ISI_RI;
625
626 break;
627
628 case 1: /* Received Break !!! */
629 tty_insert_flip_char(tty, 0, TTY_BREAK);
630 if (port->port.flags & ASYNC_SAK)
631 do_SAK(tty);
632 tty_flip_buffer_push(tty);
633 break;
634
635 case 2: /* Statistics */
636 pr_dbg("isicom_interrupt: stats!!!.\n");
637 break;
638
639 default:
640 pr_dbg("Intr: Unknown code in status packet.\n");
641 break;
642 }
643 } else { /* Data Packet */
644
645 count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
646 pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count);
647 word_count = count >> 1;
648 insw(base, rp, word_count);
649 byte_count -= (word_count << 1);
650 if (count & 0x0001) {
651 tty_insert_flip_char(tty, inw(base) & 0xff,
652 TTY_NORMAL);
653 byte_count -= 2;
654 }
655 if (byte_count > 0) {
656 pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping "
657 "bytes...\n", base, channel + 1);
658 /* drain out unread xtra data */
659 while (byte_count > 0) {
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 tty_kref_put(tty);
669
670 return IRQ_HANDLED;
671 }
672
673 static void isicom_config_port(struct tty_struct *tty)
674 {
675 struct isi_port *port = tty->driver_data;
676 struct isi_board *card = port->card;
677 unsigned long baud;
678 unsigned long base = card->base;
679 u16 channel_setup, channel = port->channel,
680 shift_count = card->shift_count;
681 unsigned char flow_ctrl;
682
683 /* FIXME: Switch to new tty baud API */
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 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->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
707 baud++; /* 57.6 Kbps */
708 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
709 baud += 2; /* 115 Kbps */
710 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
711 baud += 3; /* 230 kbps*/
712 if ((port->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 } else
720 raise_dtr(port);
721
722 if (WaitTillCardIsFree(base) == 0) {
723 outw(0x8000 | (channel << shift_count) | 0x03, base);
724 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
725 channel_setup = 0;
726 switch (C_CSIZE(tty)) {
727 case CS5:
728 channel_setup |= ISICOM_CS5;
729 break;
730 case CS6:
731 channel_setup |= ISICOM_CS6;
732 break;
733 case CS7:
734 channel_setup |= ISICOM_CS7;
735 break;
736 case CS8:
737 channel_setup |= ISICOM_CS8;
738 break;
739 }
740
741 if (C_CSTOPB(tty))
742 channel_setup |= ISICOM_2SB;
743 if (C_PARENB(tty)) {
744 channel_setup |= ISICOM_EVPAR;
745 if (C_PARODD(tty))
746 channel_setup |= ISICOM_ODPAR;
747 }
748 outw(channel_setup, base);
749 InterruptTheCard(base);
750 }
751 if (C_CLOCAL(tty))
752 port->port.flags &= ~ASYNC_CHECK_CD;
753 else
754 port->port.flags |= ASYNC_CHECK_CD;
755
756 /* flow control settings ...*/
757 flow_ctrl = 0;
758 port->port.flags &= ~ASYNC_CTS_FLOW;
759 if (C_CRTSCTS(tty)) {
760 port->port.flags |= ASYNC_CTS_FLOW;
761 flow_ctrl |= ISICOM_CTSRTS;
762 }
763 if (I_IXON(tty))
764 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
765 if (I_IXOFF(tty))
766 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
767
768 if (WaitTillCardIsFree(base) == 0) {
769 outw(0x8000 | (channel << shift_count) | 0x04, base);
770 outw(flow_ctrl << 8 | 0x05, base);
771 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
772 InterruptTheCard(base);
773 }
774
775 /* rx enabled -> enable port for rx on the card */
776 if (C_CREAD(tty)) {
777 card->port_status |= (1 << channel);
778 outw(card->port_status, base + 0x02);
779 }
780 }
781
782 /* open et all */
783
784 static inline void isicom_setup_board(struct isi_board *bp)
785 {
786 int channel;
787 struct isi_port *port;
788 unsigned long flags;
789
790 spin_lock_irqsave(&bp->card_lock, flags);
791 if (bp->status & BOARD_ACTIVE) {
792 spin_unlock_irqrestore(&bp->card_lock, flags);
793 return;
794 }
795 port = bp->ports;
796 bp->status |= BOARD_ACTIVE;
797 for (channel = 0; channel < bp->port_count; channel++, port++)
798 drop_dtr_rts(port);
799 spin_unlock_irqrestore(&bp->card_lock, flags);
800 }
801
802 static int isicom_setup_port(struct tty_struct *tty)
803 {
804 struct isi_port *port = tty->driver_data;
805 struct isi_board *card = port->card;
806 unsigned long flags;
807
808 if (port->port.flags & ASYNC_INITIALIZED)
809 return 0;
810 if (tty_port_alloc_xmit_buf(&port->port) < 0)
811 return -ENOMEM;
812
813 spin_lock_irqsave(&card->card_lock, flags);
814 clear_bit(TTY_IO_ERROR, &tty->flags);
815 if (port->port.count == 1)
816 card->count++;
817
818 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
819
820 /* discard any residual data */
821 if (WaitTillCardIsFree(card->base) == 0) {
822 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
823 card->base);
824 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
825 InterruptTheCard(card->base);
826 }
827
828 isicom_config_port(tty);
829 port->port.flags |= ASYNC_INITIALIZED;
830 spin_unlock_irqrestore(&card->card_lock, flags);
831
832 return 0;
833 }
834
835 static int isicom_carrier_raised(struct tty_port *port)
836 {
837 struct isi_port *ip = container_of(port, struct isi_port, port);
838 return (ip->status & ISI_DCD)?1 : 0;
839 }
840
841 static int isicom_open(struct tty_struct *tty, struct file *filp)
842 {
843 struct isi_port *port;
844 struct isi_board *card;
845 unsigned int board;
846 int error, line;
847
848 line = tty->index;
849 if (line < 0 || line > PORT_COUNT-1)
850 return -ENODEV;
851 board = BOARD(line);
852 card = &isi_card[board];
853
854 if (!(card->status & FIRMWARE_LOADED))
855 return -ENODEV;
856
857 /* open on a port greater than the port count for the card !!! */
858 if (line > ((board * 16) + card->port_count - 1))
859 return -ENODEV;
860
861 port = &isi_ports[line];
862 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
863 return -ENODEV;
864
865 isicom_setup_board(card);
866
867 /* FIXME: locking on port.count etc */
868 port->port.count++;
869 tty->driver_data = port;
870 tty_port_tty_set(&port->port, tty);
871 error = isicom_setup_port(tty);
872 if (error == 0)
873 error = tty_port_block_til_ready(&port->port, tty, filp);
874 return error;
875 }
876
877 /* close et all */
878
879 static inline void isicom_shutdown_board(struct isi_board *bp)
880 {
881 if (bp->status & BOARD_ACTIVE)
882 bp->status &= ~BOARD_ACTIVE;
883 }
884
885 /* card->lock HAS to be held */
886 static void isicom_shutdown_port(struct isi_port *port)
887 {
888 struct isi_board *card = port->card;
889 struct tty_struct *tty;
890
891 tty = tty_port_tty_get(&port->port);
892
893 if (!(port->port.flags & ASYNC_INITIALIZED)) {
894 tty_kref_put(tty);
895 return;
896 }
897
898 tty_port_free_xmit_buf(&port->port);
899 port->port.flags &= ~ASYNC_INITIALIZED;
900 /* 3rd October 2000 : Vinayak P Risbud */
901 tty_port_tty_set(&port->port, NULL);
902
903 /*Fix done by Anil .S on 30-04-2001
904 remote login through isi port has dtr toggle problem
905 due to which the carrier drops before the password prompt
906 appears on the remote end. Now we drop the dtr only if the
907 HUPCL(Hangup on close) flag is set for the tty*/
908
909 if (C_HUPCL(tty))
910 /* drop dtr on this port */
911 drop_dtr(port);
912
913 /* any other port uninits */
914 if (tty)
915 set_bit(TTY_IO_ERROR, &tty->flags);
916
917 if (--card->count < 0) {
918 pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n",
919 card->base, card->count);
920 card->count = 0;
921 }
922
923 /* last port was closed, shutdown that boad too */
924 if (C_HUPCL(tty)) {
925 if (!card->count)
926 isicom_shutdown_board(card);
927 }
928 }
929
930 static void isicom_flush_buffer(struct tty_struct *tty)
931 {
932 struct isi_port *port = tty->driver_data;
933 struct isi_board *card = port->card;
934 unsigned long flags;
935
936 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
937 return;
938
939 spin_lock_irqsave(&card->card_lock, flags);
940 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
941 spin_unlock_irqrestore(&card->card_lock, flags);
942
943 tty_wakeup(tty);
944 }
945
946 static void isicom_close(struct tty_struct *tty, struct file *filp)
947 {
948 struct isi_port *ip = tty->driver_data;
949 struct tty_port *port = &ip->port;
950 struct isi_board *card;
951 unsigned long flags;
952
953 BUG_ON(!ip);
954
955 card = ip->card;
956 if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
957 return;
958
959 /* indicate to the card that no more data can be received
960 on this port */
961 spin_lock_irqsave(&card->card_lock, flags);
962 if (port->flags & ASYNC_INITIALIZED) {
963 card->port_status &= ~(1 << ip->channel);
964 outw(card->port_status, card->base + 0x02);
965 }
966 isicom_shutdown_port(ip);
967 spin_unlock_irqrestore(&card->card_lock, flags);
968
969 isicom_flush_buffer(tty);
970
971 tty_port_close_end(port, tty);
972 }
973
974 /* write et all */
975 static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
976 int count)
977 {
978 struct isi_port *port = tty->driver_data;
979 struct isi_board *card = port->card;
980 unsigned long flags;
981 int cnt, total = 0;
982
983 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
984 return 0;
985
986 spin_lock_irqsave(&card->card_lock, flags);
987
988 while (1) {
989 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
990 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
991 if (cnt <= 0)
992 break;
993
994 memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
995 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
996 - 1);
997 port->xmit_cnt += cnt;
998 buf += cnt;
999 count -= cnt;
1000 total += cnt;
1001 }
1002 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
1003 port->status |= ISI_TXOK;
1004 spin_unlock_irqrestore(&card->card_lock, flags);
1005 return total;
1006 }
1007
1008 /* put_char et all */
1009 static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
1010 {
1011 struct isi_port *port = tty->driver_data;
1012 struct isi_board *card = port->card;
1013 unsigned long flags;
1014
1015 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
1016 return 0;
1017
1018 spin_lock_irqsave(&card->card_lock, flags);
1019 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
1020 spin_unlock_irqrestore(&card->card_lock, flags);
1021 return 0;
1022 }
1023
1024 port->port.xmit_buf[port->xmit_head++] = ch;
1025 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
1026 port->xmit_cnt++;
1027 spin_unlock_irqrestore(&card->card_lock, flags);
1028 return 1;
1029 }
1030
1031 /* flush_chars et all */
1032 static void isicom_flush_chars(struct tty_struct *tty)
1033 {
1034 struct isi_port *port = tty->driver_data;
1035
1036 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1037 return;
1038
1039 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1040 !port->port.xmit_buf)
1041 return;
1042
1043 /* this tells the transmitter to consider this port for
1044 data output to the card ... that's the best we can do. */
1045 port->status |= ISI_TXOK;
1046 }
1047
1048 /* write_room et all */
1049 static int isicom_write_room(struct tty_struct *tty)
1050 {
1051 struct isi_port *port = tty->driver_data;
1052 int free;
1053
1054 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1055 return 0;
1056
1057 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1058 if (free < 0)
1059 free = 0;
1060 return free;
1061 }
1062
1063 /* chars_in_buffer et all */
1064 static int isicom_chars_in_buffer(struct tty_struct *tty)
1065 {
1066 struct isi_port *port = tty->driver_data;
1067 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1068 return 0;
1069 return port->xmit_cnt;
1070 }
1071
1072 /* ioctl et all */
1073 static int isicom_send_break(struct tty_struct *tty, int length)
1074 {
1075 struct isi_port *port = tty->driver_data;
1076 struct isi_board *card = port->card;
1077 unsigned long base = card->base;
1078
1079 if (length == -1)
1080 return -EOPNOTSUPP;
1081
1082 if (!lock_card(card))
1083 return -EINVAL;
1084
1085 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1086 outw((length & 0xff) << 8 | 0x00, base);
1087 outw((length & 0xff00), base);
1088 InterruptTheCard(base);
1089
1090 unlock_card(card);
1091 return 0;
1092 }
1093
1094 static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
1095 {
1096 struct isi_port *port = tty->driver_data;
1097 /* just send the port status */
1098 u16 status = port->status;
1099
1100 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1101 return -ENODEV;
1102
1103 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1104 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1105 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1106 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1107 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1108 ((status & ISI_RI ) ? TIOCM_RI : 0);
1109 }
1110
1111 static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
1112 unsigned int set, unsigned int clear)
1113 {
1114 struct isi_port *port = tty->driver_data;
1115 unsigned long flags;
1116
1117 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1118 return -ENODEV;
1119
1120 spin_lock_irqsave(&port->card->card_lock, flags);
1121 if (set & TIOCM_RTS)
1122 raise_rts(port);
1123 if (set & TIOCM_DTR)
1124 raise_dtr(port);
1125
1126 if (clear & TIOCM_RTS)
1127 drop_rts(port);
1128 if (clear & TIOCM_DTR)
1129 drop_dtr(port);
1130 spin_unlock_irqrestore(&port->card->card_lock, flags);
1131
1132 return 0;
1133 }
1134
1135 static int isicom_set_serial_info(struct tty_struct *tty,
1136 struct serial_struct __user *info)
1137 {
1138 struct isi_port *port = tty->driver_data;
1139 struct serial_struct newinfo;
1140 int reconfig_port;
1141
1142 if (copy_from_user(&newinfo, info, sizeof(newinfo)))
1143 return -EFAULT;
1144
1145 lock_kernel();
1146
1147 reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
1148 (newinfo.flags & ASYNC_SPD_MASK));
1149
1150 if (!capable(CAP_SYS_ADMIN)) {
1151 if ((newinfo.close_delay != port->port.close_delay) ||
1152 (newinfo.closing_wait != port->port.closing_wait) ||
1153 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1154 (port->port.flags & ~ASYNC_USR_MASK))) {
1155 unlock_kernel();
1156 return -EPERM;
1157 }
1158 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1159 (newinfo.flags & ASYNC_USR_MASK));
1160 } else {
1161 port->port.close_delay = newinfo.close_delay;
1162 port->port.closing_wait = newinfo.closing_wait;
1163 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1164 (newinfo.flags & ASYNC_FLAGS));
1165 }
1166 if (reconfig_port) {
1167 unsigned long flags;
1168 spin_lock_irqsave(&port->card->card_lock, flags);
1169 isicom_config_port(tty);
1170 spin_unlock_irqrestore(&port->card->card_lock, flags);
1171 }
1172 unlock_kernel();
1173 return 0;
1174 }
1175
1176 static int isicom_get_serial_info(struct isi_port *port,
1177 struct serial_struct __user *info)
1178 {
1179 struct serial_struct out_info;
1180
1181 lock_kernel();
1182 memset(&out_info, 0, sizeof(out_info));
1183 /* out_info.type = ? */
1184 out_info.line = port - isi_ports;
1185 out_info.port = port->card->base;
1186 out_info.irq = port->card->irq;
1187 out_info.flags = port->port.flags;
1188 /* out_info.baud_base = ? */
1189 out_info.close_delay = port->port.close_delay;
1190 out_info.closing_wait = port->port.closing_wait;
1191 unlock_kernel();
1192 if (copy_to_user(info, &out_info, sizeof(out_info)))
1193 return -EFAULT;
1194 return 0;
1195 }
1196
1197 static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
1198 unsigned int cmd, unsigned long arg)
1199 {
1200 struct isi_port *port = tty->driver_data;
1201 void __user *argp = (void __user *)arg;
1202
1203 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1204 return -ENODEV;
1205
1206 switch (cmd) {
1207 case TIOCGSERIAL:
1208 return isicom_get_serial_info(port, argp);
1209
1210 case TIOCSSERIAL:
1211 return isicom_set_serial_info(tty, argp);
1212
1213 default:
1214 return -ENOIOCTLCMD;
1215 }
1216 return 0;
1217 }
1218
1219 /* set_termios et all */
1220 static void isicom_set_termios(struct tty_struct *tty,
1221 struct ktermios *old_termios)
1222 {
1223 struct isi_port *port = tty->driver_data;
1224 unsigned long flags;
1225
1226 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1227 return;
1228
1229 if (tty->termios->c_cflag == old_termios->c_cflag &&
1230 tty->termios->c_iflag == old_termios->c_iflag)
1231 return;
1232
1233 spin_lock_irqsave(&port->card->card_lock, flags);
1234 isicom_config_port(tty);
1235 spin_unlock_irqrestore(&port->card->card_lock, flags);
1236
1237 if ((old_termios->c_cflag & CRTSCTS) &&
1238 !(tty->termios->c_cflag & CRTSCTS)) {
1239 tty->hw_stopped = 0;
1240 isicom_start(tty);
1241 }
1242 }
1243
1244 /* throttle et all */
1245 static void isicom_throttle(struct tty_struct *tty)
1246 {
1247 struct isi_port *port = tty->driver_data;
1248 struct isi_board *card = port->card;
1249
1250 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1251 return;
1252
1253 /* tell the card that this port cannot handle any more data for now */
1254 card->port_status &= ~(1 << port->channel);
1255 outw(card->port_status, card->base + 0x02);
1256 }
1257
1258 /* unthrottle et all */
1259 static void isicom_unthrottle(struct tty_struct *tty)
1260 {
1261 struct isi_port *port = tty->driver_data;
1262 struct isi_board *card = port->card;
1263
1264 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1265 return;
1266
1267 /* tell the card that this port is ready to accept more data */
1268 card->port_status |= (1 << port->channel);
1269 outw(card->port_status, card->base + 0x02);
1270 }
1271
1272 /* stop et all */
1273 static void isicom_stop(struct tty_struct *tty)
1274 {
1275 struct isi_port *port = tty->driver_data;
1276
1277 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1278 return;
1279
1280 /* this tells the transmitter not to consider this port for
1281 data output to the card. */
1282 port->status &= ~ISI_TXOK;
1283 }
1284
1285 /* start et all */
1286 static void isicom_start(struct tty_struct *tty)
1287 {
1288 struct isi_port *port = tty->driver_data;
1289
1290 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1291 return;
1292
1293 /* this tells the transmitter to consider this port for
1294 data output to the card. */
1295 port->status |= ISI_TXOK;
1296 }
1297
1298 static void isicom_hangup(struct tty_struct *tty)
1299 {
1300 struct isi_port *port = tty->driver_data;
1301 unsigned long flags;
1302
1303 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1304 return;
1305
1306 spin_lock_irqsave(&port->card->card_lock, flags);
1307 isicom_shutdown_port(port);
1308 spin_unlock_irqrestore(&port->card->card_lock, flags);
1309
1310 tty_port_hangup(&port->port);
1311 }
1312
1313
1314 /*
1315 * Driver init and deinit functions
1316 */
1317
1318 static const struct tty_operations isicom_ops = {
1319 .open = isicom_open,
1320 .close = isicom_close,
1321 .write = isicom_write,
1322 .put_char = isicom_put_char,
1323 .flush_chars = isicom_flush_chars,
1324 .write_room = isicom_write_room,
1325 .chars_in_buffer = isicom_chars_in_buffer,
1326 .ioctl = isicom_ioctl,
1327 .set_termios = isicom_set_termios,
1328 .throttle = isicom_throttle,
1329 .unthrottle = isicom_unthrottle,
1330 .stop = isicom_stop,
1331 .start = isicom_start,
1332 .hangup = isicom_hangup,
1333 .flush_buffer = isicom_flush_buffer,
1334 .tiocmget = isicom_tiocmget,
1335 .tiocmset = isicom_tiocmset,
1336 .break_ctl = isicom_send_break,
1337 };
1338
1339 static const struct tty_port_operations isicom_port_ops = {
1340 .carrier_raised = isicom_carrier_raised,
1341 .raise_dtr_rts = isicom_raise_dtr_rts,
1342 };
1343
1344 static int __devinit reset_card(struct pci_dev *pdev,
1345 const unsigned int card, unsigned int *signature)
1346 {
1347 struct isi_board *board = pci_get_drvdata(pdev);
1348 unsigned long base = board->base;
1349 unsigned int sig, portcount = 0;
1350 int retval = 0;
1351
1352 dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1353 base);
1354
1355 inw(base + 0x8);
1356
1357 msleep(10);
1358
1359 outw(0, base + 0x8); /* Reset */
1360
1361 msleep(1000);
1362
1363 sig = inw(base + 0x4) & 0xff;
1364
1365 if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1366 sig != 0xee) {
1367 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1368 "bad I/O Port Address 0x%lx).\n", card + 1, base);
1369 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1370 retval = -EIO;
1371 goto end;
1372 }
1373
1374 msleep(10);
1375
1376 portcount = inw(base + 0x2);
1377 if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1378 portcount != 8 && portcount != 16)) {
1379 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1380 card + 1);
1381 retval = -EIO;
1382 goto end;
1383 }
1384
1385 switch (sig) {
1386 case 0xa5:
1387 case 0xbb:
1388 case 0xdd:
1389 board->port_count = (portcount == 4) ? 4 : 8;
1390 board->shift_count = 12;
1391 break;
1392 case 0xcc:
1393 case 0xee:
1394 board->port_count = 16;
1395 board->shift_count = 11;
1396 break;
1397 }
1398 dev_info(&pdev->dev, "-Done\n");
1399 *signature = sig;
1400
1401 end:
1402 return retval;
1403 }
1404
1405 static int __devinit load_firmware(struct pci_dev *pdev,
1406 const unsigned int index, const unsigned int signature)
1407 {
1408 struct isi_board *board = pci_get_drvdata(pdev);
1409 const struct firmware *fw;
1410 unsigned long base = board->base;
1411 unsigned int a;
1412 u16 word_count, status;
1413 int retval = -EIO;
1414 char *name;
1415 u8 *data;
1416
1417 struct stframe {
1418 u16 addr;
1419 u16 count;
1420 u8 data[0];
1421 } *frame;
1422
1423 switch (signature) {
1424 case 0xa5:
1425 name = "isi608.bin";
1426 break;
1427 case 0xbb:
1428 name = "isi608em.bin";
1429 break;
1430 case 0xcc:
1431 name = "isi616em.bin";
1432 break;
1433 case 0xdd:
1434 name = "isi4608.bin";
1435 break;
1436 case 0xee:
1437 name = "isi4616.bin";
1438 break;
1439 default:
1440 dev_err(&pdev->dev, "Unknown signature.\n");
1441 goto end;
1442 }
1443
1444 retval = request_firmware(&fw, name, &pdev->dev);
1445 if (retval)
1446 goto end;
1447
1448 retval = -EIO;
1449
1450 for (frame = (struct stframe *)fw->data;
1451 frame < (struct stframe *)(fw->data + fw->size);
1452 frame = (struct stframe *)((u8 *)(frame + 1) +
1453 frame->count)) {
1454 if (WaitTillCardIsFree(base))
1455 goto errrelfw;
1456
1457 outw(0xf0, base); /* start upload sequence */
1458 outw(0x00, base);
1459 outw(frame->addr, base); /* lsb of address */
1460
1461 word_count = frame->count / 2 + frame->count % 2;
1462 outw(word_count, base);
1463 InterruptTheCard(base);
1464
1465 udelay(100); /* 0x2f */
1466
1467 if (WaitTillCardIsFree(base))
1468 goto errrelfw;
1469
1470 status = inw(base + 0x4);
1471 if (status != 0) {
1472 dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1473 KERN_WARNING "Address:0x%x\n"
1474 KERN_WARNING "Count:0x%x\n"
1475 KERN_WARNING "Status:0x%x\n",
1476 index + 1, frame->addr, frame->count, status);
1477 goto errrelfw;
1478 }
1479 outsw(base, frame->data, word_count);
1480
1481 InterruptTheCard(base);
1482
1483 udelay(50); /* 0x0f */
1484
1485 if (WaitTillCardIsFree(base))
1486 goto errrelfw;
1487
1488 status = inw(base + 0x4);
1489 if (status != 0) {
1490 dev_err(&pdev->dev, "Card%d got out of sync.Card "
1491 "Status:0x%x\n", index + 1, status);
1492 goto errrelfw;
1493 }
1494 }
1495
1496 /* XXX: should we test it by reading it back and comparing with original like
1497 * in load firmware package? */
1498 for (frame = (struct stframe *)fw->data;
1499 frame < (struct stframe *)(fw->data + fw->size);
1500 frame = (struct stframe *)((u8 *)(frame + 1) +
1501 frame->count)) {
1502 if (WaitTillCardIsFree(base))
1503 goto errrelfw;
1504
1505 outw(0xf1, base); /* start download sequence */
1506 outw(0x00, base);
1507 outw(frame->addr, base); /* lsb of address */
1508
1509 word_count = (frame->count >> 1) + frame->count % 2;
1510 outw(word_count + 1, base);
1511 InterruptTheCard(base);
1512
1513 udelay(50); /* 0xf */
1514
1515 if (WaitTillCardIsFree(base))
1516 goto errrelfw;
1517
1518 status = inw(base + 0x4);
1519 if (status != 0) {
1520 dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1521 KERN_WARNING "Address:0x%x\n"
1522 KERN_WARNING "Count:0x%x\n"
1523 KERN_WARNING "Status: 0x%x\n",
1524 index + 1, frame->addr, frame->count, status);
1525 goto errrelfw;
1526 }
1527
1528 data = kmalloc(word_count * 2, GFP_KERNEL);
1529 if (data == NULL) {
1530 dev_err(&pdev->dev, "Card%d, firmware upload "
1531 "failed, not enough memory\n", index + 1);
1532 goto errrelfw;
1533 }
1534 inw(base);
1535 insw(base, data, word_count);
1536 InterruptTheCard(base);
1537
1538 for (a = 0; a < frame->count; a++)
1539 if (data[a] != frame->data[a]) {
1540 kfree(data);
1541 dev_err(&pdev->dev, "Card%d, firmware upload "
1542 "failed\n", index + 1);
1543 goto errrelfw;
1544 }
1545 kfree(data);
1546
1547 udelay(50); /* 0xf */
1548
1549 if (WaitTillCardIsFree(base))
1550 goto errrelfw;
1551
1552 status = inw(base + 0x4);
1553 if (status != 0) {
1554 dev_err(&pdev->dev, "Card%d verify got out of sync. "
1555 "Card Status:0x%x\n", index + 1, status);
1556 goto errrelfw;
1557 }
1558 }
1559
1560 /* xfer ctrl */
1561 if (WaitTillCardIsFree(base))
1562 goto errrelfw;
1563
1564 outw(0xf2, base);
1565 outw(0x800, base);
1566 outw(0x0, base);
1567 outw(0x0, base);
1568 InterruptTheCard(base);
1569 outw(0x0, base + 0x4); /* for ISI4608 cards */
1570
1571 board->status |= FIRMWARE_LOADED;
1572 retval = 0;
1573
1574 errrelfw:
1575 release_firmware(fw);
1576 end:
1577 return retval;
1578 }
1579
1580 /*
1581 * Insmod can set static symbols so keep these static
1582 */
1583 static unsigned int card_count;
1584
1585 static int __devinit isicom_probe(struct pci_dev *pdev,
1586 const struct pci_device_id *ent)
1587 {
1588 unsigned int signature, index;
1589 int retval = -EPERM;
1590 struct isi_board *board = NULL;
1591
1592 if (card_count >= BOARD_COUNT)
1593 goto err;
1594
1595 retval = pci_enable_device(pdev);
1596 if (retval) {
1597 dev_err(&pdev->dev, "failed to enable\n");
1598 goto err;
1599 }
1600
1601 dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1602
1603 /* allot the first empty slot in the array */
1604 for (index = 0; index < BOARD_COUNT; index++)
1605 if (isi_card[index].base == 0) {
1606 board = &isi_card[index];
1607 break;
1608 }
1609
1610 board->index = index;
1611 board->base = pci_resource_start(pdev, 3);
1612 board->irq = pdev->irq;
1613 card_count++;
1614
1615 pci_set_drvdata(pdev, board);
1616
1617 retval = pci_request_region(pdev, 3, ISICOM_NAME);
1618 if (retval) {
1619 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1620 "will be disabled.\n", board->base, board->base + 15,
1621 index + 1);
1622 retval = -EBUSY;
1623 goto errdec;
1624 }
1625
1626 retval = request_irq(board->irq, isicom_interrupt,
1627 IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board);
1628 if (retval < 0) {
1629 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1630 "Card%d will be disabled.\n", board->irq, index + 1);
1631 goto errunrr;
1632 }
1633
1634 retval = reset_card(pdev, index, &signature);
1635 if (retval < 0)
1636 goto errunri;
1637
1638 retval = load_firmware(pdev, index, signature);
1639 if (retval < 0)
1640 goto errunri;
1641
1642 for (index = 0; index < board->port_count; index++)
1643 tty_register_device(isicom_normal, board->index * 16 + index,
1644 &pdev->dev);
1645
1646 return 0;
1647
1648 errunri:
1649 free_irq(board->irq, board);
1650 errunrr:
1651 pci_release_region(pdev, 3);
1652 errdec:
1653 board->base = 0;
1654 card_count--;
1655 pci_disable_device(pdev);
1656 err:
1657 return retval;
1658 }
1659
1660 static void __devexit isicom_remove(struct pci_dev *pdev)
1661 {
1662 struct isi_board *board = pci_get_drvdata(pdev);
1663 unsigned int i;
1664
1665 for (i = 0; i < board->port_count; i++)
1666 tty_unregister_device(isicom_normal, board->index * 16 + i);
1667
1668 free_irq(board->irq, board);
1669 pci_release_region(pdev, 3);
1670 board->base = 0;
1671 card_count--;
1672 pci_disable_device(pdev);
1673 }
1674
1675 static int __init isicom_init(void)
1676 {
1677 int retval, idx, channel;
1678 struct isi_port *port;
1679
1680 for (idx = 0; idx < BOARD_COUNT; idx++) {
1681 port = &isi_ports[idx * 16];
1682 isi_card[idx].ports = port;
1683 spin_lock_init(&isi_card[idx].card_lock);
1684 for (channel = 0; channel < 16; channel++, port++) {
1685 tty_port_init(&port->port);
1686 port->port.ops = &isicom_port_ops;
1687 port->magic = ISICOM_MAGIC;
1688 port->card = &isi_card[idx];
1689 port->channel = channel;
1690 port->port.close_delay = 50 * HZ/100;
1691 port->port.closing_wait = 3000 * HZ/100;
1692 port->status = 0;
1693 /* . . . */
1694 }
1695 isi_card[idx].base = 0;
1696 isi_card[idx].irq = 0;
1697 }
1698
1699 /* tty driver structure initialization */
1700 isicom_normal = alloc_tty_driver(PORT_COUNT);
1701 if (!isicom_normal) {
1702 retval = -ENOMEM;
1703 goto error;
1704 }
1705
1706 isicom_normal->owner = THIS_MODULE;
1707 isicom_normal->name = "ttyM";
1708 isicom_normal->major = ISICOM_NMAJOR;
1709 isicom_normal->minor_start = 0;
1710 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1711 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1712 isicom_normal->init_termios = tty_std_termios;
1713 isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
1714 CLOCAL;
1715 isicom_normal->flags = TTY_DRIVER_REAL_RAW |
1716 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
1717 tty_set_operations(isicom_normal, &isicom_ops);
1718
1719 retval = tty_register_driver(isicom_normal);
1720 if (retval) {
1721 pr_dbg("Couldn't register the dialin driver\n");
1722 goto err_puttty;
1723 }
1724
1725 retval = pci_register_driver(&isicom_driver);
1726 if (retval < 0) {
1727 printk(KERN_ERR "ISICOM: Unable to register pci driver.\n");
1728 goto err_unrtty;
1729 }
1730
1731 mod_timer(&tx, jiffies + 1);
1732
1733 return 0;
1734 err_unrtty:
1735 tty_unregister_driver(isicom_normal);
1736 err_puttty:
1737 put_tty_driver(isicom_normal);
1738 error:
1739 return retval;
1740 }
1741
1742 static void __exit isicom_exit(void)
1743 {
1744 del_timer_sync(&tx);
1745
1746 pci_unregister_driver(&isicom_driver);
1747 tty_unregister_driver(isicom_normal);
1748 put_tty_driver(isicom_normal);
1749 }
1750
1751 module_init(isicom_init);
1752 module_exit(isicom_exit);
1753
1754 MODULE_AUTHOR("MultiTech");
1755 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1756 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards