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MOXA linux-2.6.x / linux-2.6.9-uc0 from sdlinux-moxaart.tgz
[linux-2.6.9-moxart.git] / drivers / char / isicom.c
blobb454bf2084bf8c450ba0b44ff5991eb0eb2ca3bd
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 * 09/06/01 acme@conectiva.com.br use capable, not suser, do
20 * restore_flags on failure in
21 * isicom_send_break, verify put_user
22 * result
23 * ***********************************************************
24 *
25 * To use this driver you also need the support package. You
26 * can find this in RPM format on
27 * ftp://ftp.linux.org.uk/pub/linux/alan
28 *
29 * You can find the original tools for this direct from Multitech
30 * ftp://ftp.multitech.com/ISI-Cards/
31 *
32 * Having installed the cards the module options (/etc/modprobe.conf)
33 *
34 * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4
35 *
36 * Omit those entries for boards you don't have installed.
37 *
38 */
39
40 #include <linux/module.h>
41 #include <linux/kernel.h>
42 #include <linux/tty.h>
43 #include <linux/termios.h>
44 #include <linux/fs.h>
45 #include <linux/sched.h>
46 #include <linux/serial.h>
47 #include <linux/mm.h>
48 #include <linux/miscdevice.h>
49 #include <linux/interrupt.h>
50 #include <linux/timer.h>
51 #include <linux/delay.h>
52 #include <linux/ioport.h>
53
54 #include <asm/uaccess.h>
55 #include <asm/io.h>
56 #include <asm/system.h>
57
58 #include <linux/pci.h>
59
60 #include <linux/isicom.h>
61
62 static struct pci_device_id isicom_pci_tbl[] = {
63 { VENDOR_ID, 0x2028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
64 { VENDOR_ID, 0x2051, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
65 { VENDOR_ID, 0x2052, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
66 { VENDOR_ID, 0x2053, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
67 { VENDOR_ID, 0x2054, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
68 { VENDOR_ID, 0x2055, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
69 { VENDOR_ID, 0x2056, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
70 { VENDOR_ID, 0x2057, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
71 { VENDOR_ID, 0x2058, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
72 { 0 }
73 };
74 MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
75
76 static int prev_card = 3; /* start servicing isi_card[0] */
77 static struct isi_board * irq_to_board[16];
78 static struct tty_driver *isicom_normal;
79
80 static struct isi_board isi_card[BOARD_COUNT];
81 static struct isi_port isi_ports[PORT_COUNT];
82
83 static struct timer_list tx;
84 static char re_schedule = 1;
85 #ifdef ISICOM_DEBUG
86 static unsigned long tx_count = 0;
87 #endif
88
89 static int ISILoad_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg);
90
91 static void isicom_tx(unsigned long _data);
92 static void isicom_start(struct tty_struct * tty);
93
94 static unsigned char * tmp_buf;
95 static DECLARE_MUTEX(tmp_buf_sem);
96
97 /* baud index mappings from linux defns to isi */
98
99 static signed char linuxb_to_isib[] = {
100 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17,
101 18, 19
102 };
103
104 /*
105 * Firmware loader driver specific routines
106 *
107 */
108
109 static struct file_operations ISILoad_fops = {
110 .owner = THIS_MODULE,
111 .ioctl = ISILoad_ioctl,
112 };
113
114 struct miscdevice isiloader_device = {
115 ISILOAD_MISC_MINOR, "isictl", &ISILoad_fops
116 };
117
118
119 static inline int WaitTillCardIsFree(unsigned short base)
120 {
121 unsigned long count=0;
122 while( (!(inw(base+0xe) & 0x1)) && (count++ < 6000000));
123 if (inw(base+0xe)&0x1)
124 return 0;
125 else
126 return 1;
127 }
128
129 static int ISILoad_ioctl(struct inode *inode, struct file *filp,
130 unsigned int cmd, unsigned long arg)
131 {
132 unsigned int card, i, j, signature, status, portcount = 0;
133 unsigned long t;
134 unsigned short word_count, base;
135 bin_frame frame;
136 void __user *argp = (void __user *)arg;
137 /* exec_record exec_rec; */
138
139 if(get_user(card, (int __user *)argp))
140 return -EFAULT;
141
142 if(card < 0 || card >= BOARD_COUNT)
143 return -ENXIO;
144
145 base=isi_card[card].base;
146
147 if(base==0)
148 return -ENXIO; /* disabled or not used */
149
150 switch(cmd) {
151 case MIOCTL_RESET_CARD:
152 if (!capable(CAP_SYS_ADMIN))
153 return -EPERM;
154 printk(KERN_DEBUG "ISILoad:Resetting Card%d at 0x%x ",card+1,base);
155
156 inw(base+0x8);
157
158 for(t=jiffies+HZ/100;time_before(jiffies, t););
159
160 outw(0,base+0x8); /* Reset */
161
162 for(j=1;j<=3;j++) {
163 for(t=jiffies+HZ;time_before(jiffies, t););
164 printk(".");
165 }
166 signature=(inw(base+0x4)) & 0xff;
167 if (isi_card[card].isa) {
168
169 if (!(inw(base+0xe) & 0x1) || (inw(base+0x2))) {
170 #ifdef ISICOM_DEBUG
171 printk("\nbase+0x2=0x%x , base+0xe=0x%x",inw(base+0x2),inw(base+0xe));
172 #endif
173 printk("\nISILoad:ISA Card%d reset failure (Possible bad I/O Port Address 0x%x).\n",card+1,base);
174 return -EIO;
175 }
176 }
177 else {
178 portcount = inw(base+0x2);
179 if (!(inw(base+0xe) & 0x1) || ((portcount!=0) && (portcount!=4) && (portcount!=8))) {
180 #ifdef ISICOM_DEBUG
181 printk("\nbase+0x2=0x%x , base+0xe=0x%x",inw(base+0x2),inw(base+0xe));
182 #endif
183 printk("\nISILoad:PCI Card%d reset failure (Possible bad I/O Port Address 0x%x).\n",card+1,base);
184 return -EIO;
185 }
186 }
187 switch(signature) {
188 case 0xa5:
189 case 0xbb:
190 case 0xdd:
191 if (isi_card[card].isa)
192 isi_card[card].port_count = 8;
193 else {
194 if (portcount == 4)
195 isi_card[card].port_count = 4;
196 else
197 isi_card[card].port_count = 8;
198 }
199 isi_card[card].shift_count = 12;
200 break;
201
202 case 0xcc: isi_card[card].port_count = 16;
203 isi_card[card].shift_count = 11;
204 break;
205
206 default: printk("ISILoad:Card%d reset failure (Possible bad I/O Port Address 0x%x).\n",card+1,base);
207 #ifdef ISICOM_DEBUG
208 printk("Sig=0x%x\n",signature);
209 #endif
210 return -EIO;
211 }
212 printk("-Done\n");
213 return put_user(signature,(unsigned __user *)argp);
214
215 case MIOCTL_LOAD_FIRMWARE:
216 if (!capable(CAP_SYS_ADMIN))
217 return -EPERM;
218
219 if(copy_from_user(&frame, argp, sizeof(bin_frame)))
220 return -EFAULT;
221
222 if (WaitTillCardIsFree(base))
223 return -EIO;
224
225 outw(0xf0,base); /* start upload sequence */
226 outw(0x00,base);
227 outw((frame.addr), base);/* lsb of adderess */
228
229 word_count=(frame.count >> 1) + frame.count % 2;
230 outw(word_count, base);
231 InterruptTheCard(base);
232
233 for(i=0;i<=0x2f;i++); /* a wee bit of delay */
234
235 if (WaitTillCardIsFree(base))
236 return -EIO;
237
238 if ((status=inw(base+0x4))!=0) {
239 printk(KERN_WARNING "ISILoad:Card%d rejected load header:\nAddress:0x%x \nCount:0x%x \nStatus:0x%x \n",
240 card+1, frame.addr, frame.count, status);
241 return -EIO;
242 }
243 outsw(base, (void *) frame.bin_data, word_count);
244
245 InterruptTheCard(base);
246
247 for(i=0;i<=0x0f;i++); /* another wee bit of delay */
248
249 if (WaitTillCardIsFree(base))
250 return -EIO;
251
252 if ((status=inw(base+0x4))!=0) {
253 printk(KERN_ERR "ISILoad:Card%d got out of sync.Card Status:0x%x\n",card+1, status);
254 return -EIO;
255 }
256 return 0;
257
258 case MIOCTL_READ_FIRMWARE:
259 if (!capable(CAP_SYS_ADMIN))
260 return -EPERM;
261
262 if(copy_from_user(&frame, argp, sizeof(bin_header)))
263 return -EFAULT;
264
265 if (WaitTillCardIsFree(base))
266 return -EIO;
267
268 outw(0xf1,base); /* start download sequence */
269 outw(0x00,base);
270 outw((frame.addr), base);/* lsb of adderess */
271
272 word_count=(frame.count >> 1) + frame.count % 2;
273 outw(word_count+1, base);
274 InterruptTheCard(base);
275
276 for(i=0;i<=0xf;i++); /* a wee bit of delay */
277
278 if (WaitTillCardIsFree(base))
279 return -EIO;
280
281 if ((status=inw(base+0x4))!=0) {
282 printk(KERN_WARNING "ISILoad:Card%d rejected verify header:\nAddress:0x%x \nCount:0x%x \nStatus:0x%x \n",
283 card+1, frame.addr, frame.count, status);
284 return -EIO;
285 }
286
287 inw(base);
288 insw(base, frame.bin_data, word_count);
289 InterruptTheCard(base);
290
291 for(i=0;i<=0x0f;i++); /* another wee bit of delay */
292
293 if (WaitTillCardIsFree(base))
294 return -EIO;
295
296 if ((status=inw(base+0x4))!=0) {
297 printk(KERN_ERR "ISILoad:Card%d verify got out of sync.Card Status:0x%x\n",card+1, status);
298 return -EIO;
299 }
300
301 if(copy_to_user(argp, &frame, sizeof(bin_frame)))
302 return -EFAULT;
303 return 0;
304
305 case MIOCTL_XFER_CTRL:
306 if (!capable(CAP_SYS_ADMIN))
307 return -EPERM;
308 if (WaitTillCardIsFree(base))
309 return -EIO;
310
311 outw(0xf2, base);
312 outw(0x800, base);
313 outw(0x0, base);
314 outw(0x0, base);
315 InterruptTheCard(base);
316 outw(0x0, base+0x4); /* for ISI4608 cards */
317
318 isi_card[card].status |= FIRMWARE_LOADED;
319 return 0;
320
321 default:
322 #ifdef ISICOM_DEBUG
323 printk(KERN_DEBUG "ISILoad: Received Ioctl cmd 0x%x.\n", cmd);
324 #endif
325 return -ENOIOCTLCMD;
326
327 }
328
329 }
330
331
332 /*
333 * ISICOM Driver specific routines ...
334 *
335 */
336
337 static inline int isicom_paranoia_check(struct isi_port const * port, char *name,
338 const char * routine)
339 {
340 #ifdef ISICOM_DEBUG
341 static const char * badmagic =
342 KERN_WARNING "ISICOM: Warning: bad isicom magic for dev %s in %s.\n";
343 static const char * badport =
344 KERN_WARNING "ISICOM: Warning: NULL isicom port for dev %s in %s.\n";
345 if (!port) {
346 printk(badport, name, routine);
347 return 1;
348 }
349 if (port->magic != ISICOM_MAGIC) {
350 printk(badmagic, name, routine);
351 return 1;
352 }
353 #endif
354 return 0;
355 }
356
357 /* Transmitter */
358
359 static void isicom_tx(unsigned long _data)
360 {
361 short count = (BOARD_COUNT-1), card, base;
362 short txcount, wait, wrd, residue, word_count, cnt;
363 struct isi_port * port;
364 struct tty_struct * tty;
365 unsigned long flags;
366
367 #ifdef ISICOM_DEBUG
368 ++tx_count;
369 #endif
370
371 /* find next active board */
372 card = (prev_card + 1) & 0x0003;
373 while(count-- > 0) {
374 if (isi_card[card].status & BOARD_ACTIVE)
375 break;
376 card = (card + 1) & 0x0003;
377 }
378 if (!(isi_card[card].status & BOARD_ACTIVE))
379 goto sched_again;
380
381 prev_card = card;
382
383 count = isi_card[card].port_count;
384 port = isi_card[card].ports;
385 base = isi_card[card].base;
386 for (;count > 0;count--, port++) {
387 /* port not active or tx disabled to force flow control */
388 if (!(port->status & ISI_TXOK))
389 continue;
390
391 tty = port->tty;
392 save_flags(flags); cli();
393 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
394 if ((txcount <= 0) || tty->stopped || tty->hw_stopped) {
395 restore_flags(flags);
396 continue;
397 }
398 wait = 200;
399 while(((inw(base+0x0e) & 0x01) == 0) && (wait-- > 0));
400 if (wait <= 0) {
401 restore_flags(flags);
402 #ifdef ISICOM_DEBUG
403 printk(KERN_DEBUG "ISICOM: isicom_tx:Card(0x%x) found busy.\n",
404 card);
405 #endif
406 continue;
407 }
408 if (!(inw(base + 0x02) & (1 << port->channel))) {
409 restore_flags(flags);
410 #ifdef ISICOM_DEBUG
411 printk(KERN_DEBUG "ISICOM: isicom_tx: cannot tx to 0x%x:%d.\n",
412 base, port->channel + 1);
413 #endif
414 continue;
415 }
416 #ifdef ISICOM_DEBUG
417 printk(KERN_DEBUG "ISICOM: txing %d bytes, port%d.\n",
418 txcount, port->channel+1);
419 #endif
420 outw((port->channel << isi_card[card].shift_count) | txcount
421 , base);
422 residue = NO;
423 wrd = 0;
424 while (1) {
425 cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE - port->xmit_tail));
426 if (residue == YES) {
427 residue = NO;
428 if (cnt > 0) {
429 wrd |= (port->xmit_buf[port->xmit_tail] << 8);
430 port->xmit_tail = (port->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1);
431 port->xmit_cnt--;
432 txcount--;
433 cnt--;
434 outw(wrd, base);
435 }
436 else {
437 outw(wrd, base);
438 break;
439 }
440 }
441 if (cnt <= 0) break;
442 word_count = cnt >> 1;
443 outsw(base, port->xmit_buf+port->xmit_tail, word_count);
444 port->xmit_tail = (port->xmit_tail + (word_count << 1)) &
445 (SERIAL_XMIT_SIZE - 1);
446 txcount -= (word_count << 1);
447 port->xmit_cnt -= (word_count << 1);
448 if (cnt & 0x0001) {
449 residue = YES;
450 wrd = port->xmit_buf[port->xmit_tail];
451 port->xmit_tail = (port->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1);
452 port->xmit_cnt--;
453 txcount--;
454 }
455 }
456
457 InterruptTheCard(base);
458 if (port->xmit_cnt <= 0)
459 port->status &= ~ISI_TXOK;
460 if (port->xmit_cnt <= WAKEUP_CHARS)
461 schedule_work(&port->bh_tqueue);
462 restore_flags(flags);
463 }
464
465 /* schedule another tx for hopefully in about 10ms */
466 sched_again:
467 if (!re_schedule)
468 return;
469 init_timer(&tx);
470 tx.expires = jiffies + HZ/100;
471 tx.data = 0;
472 tx.function = isicom_tx;
473 add_timer(&tx);
474
475 return;
476 }
477
478 /* Interrupt handlers */
479
480
481 static void isicom_bottomhalf(void * data)
482 {
483 struct isi_port * port = (struct isi_port *) data;
484 struct tty_struct * tty = port->tty;
485
486 if (!tty)
487 return;
488
489 tty_wakeup(tty);
490 wake_up_interruptible(&tty->write_wait);
491 }
492
493 /* main interrupt handler routine */
494 static irqreturn_t isicom_interrupt(int irq, void *dev_id,
495 struct pt_regs *regs)
496 {
497 struct isi_board * card;
498 struct isi_port * port;
499 struct tty_struct * tty;
500 unsigned short base, header, word_count, count;
501 unsigned char channel;
502 short byte_count;
503
504 /*
505 * find the source of interrupt
506 */
507
508 for(count = 0; count < BOARD_COUNT; count++) {
509 card = &isi_card[count];
510 if (card->base != 0) {
511 if (((card->isa == YES) && (card->irq == irq)) ||
512 ((card->isa == NO) && (card->irq == irq) && (inw(card->base+0x0e) & 0x02)))
513 break;
514 }
515 card = NULL;
516 }
517
518 if (!card || !(card->status & FIRMWARE_LOADED)) {
519 /* printk(KERN_DEBUG "ISICOM: interrupt: not handling irq%d!.\n", irq);*/
520 return IRQ_NONE;
521 }
522
523 base = card->base;
524 if (card->isa == NO) {
525 /*
526 * disable any interrupts from the PCI card and lower the
527 * interrupt line
528 */
529 outw(0x8000, base+0x04);
530 ClearInterrupt(base);
531 }
532
533 inw(base); /* get the dummy word out */
534 header = inw(base);
535 channel = (header & 0x7800) >> card->shift_count;
536 byte_count = header & 0xff;
537 #ifdef ISICOM_DEBUG
538 printk(KERN_DEBUG "ISICOM:Intr:(0x%x:%d).\n", base, channel+1);
539 #endif
540 if ((channel+1) > card->port_count) {
541 printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%x): %d(channel) > port_count.\n",
542 base, channel+1);
543 if (card->isa)
544 ClearInterrupt(base);
545 else
546 outw(0x0000, base+0x04); /* enable interrupts */
547 return IRQ_HANDLED;
548 }
549 port = card->ports + channel;
550 if (!(port->flags & ASYNC_INITIALIZED)) {
551 if (card->isa)
552 ClearInterrupt(base);
553 else
554 outw(0x0000, base+0x04); /* enable interrupts */
555 return IRQ_HANDLED;
556 }
557
558 tty = port->tty;
559
560 if (header & 0x8000) { /* Status Packet */
561 header = inw(base);
562 switch(header & 0xff) {
563 case 0: /* Change in EIA signals */
564
565 if (port->flags & ASYNC_CHECK_CD) {
566 if (port->status & ISI_DCD) {
567 if (!(header & ISI_DCD)) {
568 /* Carrier has been lost */
569 #ifdef ISICOM_DEBUG
570 printk(KERN_DEBUG "ISICOM: interrupt: DCD->low.\n");
571 #endif
572 port->status &= ~ISI_DCD;
573 schedule_work(&port->hangup_tq);
574 }
575 }
576 else {
577 if (header & ISI_DCD) {
578 /* Carrier has been detected */
579 #ifdef ISICOM_DEBUG
580 printk(KERN_DEBUG "ISICOM: interrupt: DCD->high.\n");
581 #endif
582 port->status |= ISI_DCD;
583 wake_up_interruptible(&port->open_wait);
584 }
585 }
586 }
587 else {
588 if (header & ISI_DCD)
589 port->status |= ISI_DCD;
590 else
591 port->status &= ~ISI_DCD;
592 }
593
594 if (port->flags & ASYNC_CTS_FLOW) {
595 if (port->tty->hw_stopped) {
596 if (header & ISI_CTS) {
597 port->tty->hw_stopped = 0;
598 /* start tx ing */
599 port->status |= (ISI_TXOK | ISI_CTS);
600 schedule_work(&port->bh_tqueue);
601 }
602 }
603 else {
604 if (!(header & ISI_CTS)) {
605 port->tty->hw_stopped = 1;
606 /* stop tx ing */
607 port->status &= ~(ISI_TXOK | ISI_CTS);
608 }
609 }
610 }
611 else {
612 if (header & ISI_CTS)
613 port->status |= ISI_CTS;
614 else
615 port->status &= ~ISI_CTS;
616 }
617
618 if (header & ISI_DSR)
619 port->status |= ISI_DSR;
620 else
621 port->status &= ~ISI_DSR;
622
623 if (header & ISI_RI)
624 port->status |= ISI_RI;
625 else
626 port->status &= ~ISI_RI;
627
628 break;
629
630 case 1: /* Received Break !!! */
631 if (tty->flip.count >= TTY_FLIPBUF_SIZE)
632 break;
633 *tty->flip.flag_buf_ptr++ = TTY_BREAK;
634 /* dunno if this is right */
635 *tty->flip.char_buf_ptr++ = 0;
636 tty->flip.count++;
637 if (port->flags & ASYNC_SAK)
638 do_SAK(tty);
639 schedule_delayed_work(&tty->flip.work, 1);
640 break;
641
642 case 2: /* Statistics */
643 printk(KERN_DEBUG "ISICOM: isicom_interrupt: stats!!!.\n");
644 break;
645
646 default:
647 printk(KERN_WARNING "ISICOM: Intr: Unknown code in status packet.\n");
648 break;
649 }
650 }
651 else { /* Data Packet */
652 count = min_t(unsigned short, byte_count, (TTY_FLIPBUF_SIZE - tty->flip.count));
653 #ifdef ISICOM_DEBUG
654 printk(KERN_DEBUG "ISICOM: Intr: Can rx %d of %d bytes.\n",
655 count, byte_count);
656 #endif
657 word_count = count >> 1;
658 insw(base, tty->flip.char_buf_ptr, word_count);
659 tty->flip.char_buf_ptr += (word_count << 1);
660 byte_count -= (word_count << 1);
661 if (count & 0x0001) {
662 *tty->flip.char_buf_ptr++ = (char)(inw(base) & 0xff);
663 byte_count -= 2;
664 }
665 memset(tty->flip.flag_buf_ptr, 0, count);
666 tty->flip.flag_buf_ptr += count;
667 tty->flip.count += count;
668
669 if (byte_count > 0) {
670 printk(KERN_DEBUG "ISICOM: Intr(0x%x:%d): Flip buffer overflow! dropping bytes...\n",
671 base, channel+1);
672 while(byte_count > 0) { /* drain out unread xtra data */
673 inw(base);
674 byte_count -= 2;
675 }
676 }
677 schedule_delayed_work(&tty->flip.work, 1);
678 }
679 if (card->isa == YES)
680 ClearInterrupt(base);
681 else
682 outw(0x0000, base+0x04); /* enable interrupts */
683 return IRQ_HANDLED;
684 }
685
686 /* called with interrupts disabled */
687 static void isicom_config_port(struct isi_port * port)
688 {
689 struct isi_board * card = port->card;
690 struct tty_struct * tty;
691 unsigned long baud;
692 unsigned short channel_setup, wait, base = card->base;
693 unsigned short channel = port->channel, shift_count = card->shift_count;
694 unsigned char flow_ctrl;
695
696 if (!(tty = port->tty) || !tty->termios)
697 return;
698 baud = C_BAUD(tty);
699 if (baud & CBAUDEX) {
700 baud &= ~CBAUDEX;
701
702 /* if CBAUDEX bit is on and the baud is set to either 50 or 75
703 * then the card is programmed for 57.6Kbps or 115Kbps
704 * respectively.
705 */
706
707 if (baud < 1 || baud > 2)
708 port->tty->termios->c_cflag &= ~CBAUDEX;
709 else
710 baud += 15;
711 }
712 if (baud == 15) {
713
714 /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
715 * by the set_serial_info ioctl ... this is done by
716 * the 'setserial' utility.
717 */
718
719 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
720 baud++; /* 57.6 Kbps */
721 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
722 baud +=2; /* 115 Kbps */
723 }
724 if (linuxb_to_isib[baud] == -1) {
725 /* hang up */
726 drop_dtr(port);
727 return;
728 }
729 else
730 raise_dtr(port);
731
732 wait = 100;
733 while (((inw(base + 0x0e) & 0x0001) == 0) && (wait-- > 0));
734 if (!wait) {
735 printk(KERN_WARNING "ISICOM: Card found busy in isicom_config_port at channel setup.\n");
736 return;
737 }
738 outw(0x8000 | (channel << shift_count) |0x03, base);
739 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
740 channel_setup = 0;
741 switch(C_CSIZE(tty)) {
742 case CS5:
743 channel_setup |= ISICOM_CS5;
744 break;
745 case CS6:
746 channel_setup |= ISICOM_CS6;
747 break;
748 case CS7:
749 channel_setup |= ISICOM_CS7;
750 break;
751 case CS8:
752 channel_setup |= ISICOM_CS8;
753 break;
754 }
755
756 if (C_CSTOPB(tty))
757 channel_setup |= ISICOM_2SB;
758
759 if (C_PARENB(tty))
760 channel_setup |= ISICOM_EVPAR;
761 if (C_PARODD(tty))
762 channel_setup |= ISICOM_ODPAR;
763 outw(channel_setup, base);
764 InterruptTheCard(base);
765
766 if (C_CLOCAL(tty))
767 port->flags &= ~ASYNC_CHECK_CD;
768 else
769 port->flags |= ASYNC_CHECK_CD;
770
771 /* flow control settings ...*/
772 flow_ctrl = 0;
773 port->flags &= ~ASYNC_CTS_FLOW;
774 if (C_CRTSCTS(tty)) {
775 port->flags |= ASYNC_CTS_FLOW;
776 flow_ctrl |= ISICOM_CTSRTS;
777 }
778 if (I_IXON(tty))
779 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
780 if (I_IXOFF(tty))
781 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
782
783 wait = 100;
784 while (((inw(base + 0x0e) & 0x0001) == 0) && (wait-- > 0));
785 if (!wait) {
786 printk(KERN_WARNING "ISICOM: Card found busy in isicom_config_port at flow setup.\n");
787 return;
788 }
789 outw(0x8000 | (channel << shift_count) |0x04, base);
790 outw(flow_ctrl << 8 | 0x05, base);
791 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
792 InterruptTheCard(base);
793
794 /* rx enabled -> enable port for rx on the card */
795 if (C_CREAD(tty)) {
796 card->port_status |= (1 << channel);
797 outw(card->port_status, base + 0x02);
798 }
799
800 }
801
802 /* open et all */
803
804 static inline void isicom_setup_board(struct isi_board * bp)
805 {
806 int channel;
807 struct isi_port * port;
808 unsigned long flags;
809
810 if (bp->status & BOARD_ACTIVE)
811 return;
812 port = bp->ports;
813 #ifdef ISICOM_DEBUG
814 printk(KERN_DEBUG "ISICOM: setup_board: drop_dtr_rts start, port_count %d...\n", bp->port_count);
815 #endif
816 for(channel = 0; channel < bp->port_count; channel++, port++) {
817 save_flags(flags); cli();
818 drop_dtr_rts(port);
819 restore_flags(flags);
820 }
821 #ifdef ISICOM_DEBUG
822 printk(KERN_DEBUG "ISICOM: setup_board: drop_dtr_rts stop...\n");
823 #endif
824
825 bp->status |= BOARD_ACTIVE;
826 return;
827 }
828
829 static int isicom_setup_port(struct isi_port * port)
830 {
831 struct isi_board * card = port->card;
832 unsigned long flags;
833
834 if (port->flags & ASYNC_INITIALIZED)
835 return 0;
836 if (!port->xmit_buf) {
837 unsigned long page;
838
839 if (!(page = get_zeroed_page(GFP_KERNEL)))
840 return -ENOMEM;
841
842 if (port->xmit_buf) {
843 free_page(page);
844 return -ERESTARTSYS;
845 }
846 port->xmit_buf = (unsigned char *) page;
847 }
848 save_flags(flags); cli();
849 if (port->tty)
850 clear_bit(TTY_IO_ERROR, &port->tty->flags);
851 if (port->count == 1)
852 card->count++;
853
854 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
855
856 /* discard any residual data */
857 kill_queue(port, ISICOM_KILLTX | ISICOM_KILLRX);
858
859 isicom_config_port(port);
860 port->flags |= ASYNC_INITIALIZED;
861
862 restore_flags(flags);
863
864 return 0;
865 }
866
867 static int block_til_ready(struct tty_struct * tty, struct file * filp, struct isi_port * port)
868 {
869 int do_clocal = 0, retval;
870 DECLARE_WAITQUEUE(wait, current);
871
872 /* block if port is in the process of being closed */
873
874 if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
875 #ifdef ISICOM_DEBUG
876 printk(KERN_DEBUG "ISICOM: block_til_ready: close in progress.\n");
877 #endif
878 interruptible_sleep_on(&port->close_wait);
879 if (port->flags & ASYNC_HUP_NOTIFY)
880 return -EAGAIN;
881 else
882 return -ERESTARTSYS;
883 }
884
885 /* if non-blocking mode is set ... */
886
887 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
888 #ifdef ISICOM_DEBUG
889 printk(KERN_DEBUG "ISICOM: block_til_ready: non-block mode.\n");
890 #endif
891 port->flags |= ASYNC_NORMAL_ACTIVE;
892 return 0;
893 }
894
895 if (C_CLOCAL(tty))
896 do_clocal = 1;
897 #ifdef ISICOM_DEBUG
898 if (do_clocal)
899 printk(KERN_DEBUG "ISICOM: block_til_ready: CLOCAL set.\n");
900 #endif
901
902 /* block waiting for DCD to be asserted, and while
903 callout dev is busy */
904 retval = 0;
905 add_wait_queue(&port->open_wait, &wait);
906 cli();
907 if (!tty_hung_up_p(filp))
908 port->count--;
909 sti();
910 port->blocked_open++;
911 #ifdef ISICOM_DEBUG
912 printk(KERN_DEBUG "ISICOM: block_til_ready: waiting for DCD...\n");
913 #endif
914 while (1) {
915 cli();
916 raise_dtr_rts(port);
917 sti();
918 set_current_state(TASK_INTERRUPTIBLE);
919 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
920 if (port->flags & ASYNC_HUP_NOTIFY)
921 retval = -EAGAIN;
922 else
923 retval = -ERESTARTSYS;
924 #ifdef ISICOM_DEBUG
925 printk(KERN_DEBUG "ISICOM: block_til_ready: tty_hung_up_p || not init.\n");
926 #endif
927 break;
928 }
929 if (!(port->flags & ASYNC_CLOSING) &&
930 (do_clocal || (port->status & ISI_DCD))) {
931 #ifdef ISICOM_DEBUG
932 printk(KERN_DEBUG "ISICOM: block_til_ready: do_clocal || DCD.\n");
933 #endif
934 break;
935 }
936 if (signal_pending(current)) {
937 #ifdef ISICOM_DEBUG
938 printk(KERN_DEBUG "ISICOM: block_til_ready: sig blocked.\n");
939 #endif
940 retval = -ERESTARTSYS;
941 break;
942 }
943 schedule();
944 }
945 set_current_state(TASK_RUNNING);
946 remove_wait_queue(&port->open_wait, &wait);
947 if (!tty_hung_up_p(filp))
948 port->count++;
949 port->blocked_open--;
950 if (retval)
951 return retval;
952 port->flags |= ASYNC_NORMAL_ACTIVE;
953 return 0;
954 }
955
956 static int isicom_open(struct tty_struct * tty, struct file * filp)
957 {
958 struct isi_port * port;
959 struct isi_board * card;
960 unsigned int line, board;
961 int error;
962
963 #ifdef ISICOM_DEBUG
964 printk(KERN_DEBUG "ISICOM: open start!!!.\n");
965 #endif
966 line = tty->index;
967
968 #ifdef ISICOM_DEBUG
969 printk(KERN_DEBUG "line = %d.\n", line);
970 #endif
971
972 if ((line < 0) || (line > (PORT_COUNT-1)))
973 return -ENODEV;
974 board = BOARD(line);
975
976 #ifdef ISICOM_DEBUG
977 printk(KERN_DEBUG "board = %d.\n", board);
978 #endif
979
980 card = &isi_card[board];
981 if (!(card->status & FIRMWARE_LOADED)) {
982 #ifdef ISICOM_DEBUG
983 printk(KERN_DEBUG"ISICOM: Firmware not loaded to card%d.\n", board);
984 #endif
985 return -ENODEV;
986 }
987
988 /* open on a port greater than the port count for the card !!! */
989 if (line > ((board * 16) + card->port_count - 1)) {
990 printk(KERN_ERR "ISICOM: Open on a port which exceeds the port_count of the card!\n");
991 return -ENODEV;
992 }
993 port = &isi_ports[line];
994 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
995 return -ENODEV;
996
997 #ifdef ISICOM_DEBUG
998 printk(KERN_DEBUG "ISICOM: isicom_setup_board ...\n");
999 #endif
1000 isicom_setup_board(card);
1001
1002 port->count++;
1003 tty->driver_data = port;
1004 port->tty = tty;
1005 #ifdef ISICOM_DEBUG
1006 printk(KERN_DEBUG "ISICOM: isicom_setup_port ...\n");
1007 #endif
1008 if ((error = isicom_setup_port(port))!=0)
1009 return error;
1010 #ifdef ISICOM_DEBUG
1011 printk(KERN_DEBUG "ISICOM: block_til_ready ...\n");
1012 #endif
1013 if ((error = block_til_ready(tty, filp, port))!=0)
1014 return error;
1015
1016 #ifdef ISICOM_DEBUG
1017 printk(KERN_DEBUG "ISICOM: open end!!!.\n");
1018 #endif
1019 return 0;
1020 }
1021
1022 /* close et all */
1023
1024 static inline void isicom_shutdown_board(struct isi_board * bp)
1025 {
1026 int channel;
1027 struct isi_port * port;
1028
1029 if (!(bp->status & BOARD_ACTIVE))
1030 return;
1031 bp->status &= ~BOARD_ACTIVE;
1032 port = bp->ports;
1033 for(channel = 0; channel < bp->port_count; channel++, port++) {
1034 drop_dtr_rts(port);
1035 }
1036 }
1037
1038 static void isicom_shutdown_port(struct isi_port * port)
1039 {
1040 struct isi_board * card = port->card;
1041 struct tty_struct * tty;
1042
1043 if (!(port->flags & ASYNC_INITIALIZED))
1044 return;
1045 if (port->xmit_buf) {
1046 free_page((unsigned long) port->xmit_buf);
1047 port->xmit_buf = NULL;
1048 }
1049 if (!(tty = port->tty) || C_HUPCL(tty))
1050 /* drop dtr on this port */
1051 drop_dtr(port);
1052
1053 /* any other port uninits */
1054
1055 if (tty)
1056 set_bit(TTY_IO_ERROR, &tty->flags);
1057 port->flags &= ~ASYNC_INITIALIZED;
1058
1059 if (--card->count < 0) {
1060 printk(KERN_DEBUG "ISICOM: isicom_shutdown_port: bad board(0x%x) count %d.\n",
1061 card->base, card->count);
1062 card->count = 0;
1063 }
1064
1065 /* last port was closed , shutdown that boad too */
1066 if (!card->count)
1067 isicom_shutdown_board(card);
1068 }
1069
1070 static void isicom_close(struct tty_struct * tty, struct file * filp)
1071 {
1072 struct isi_port * port = (struct isi_port *) tty->driver_data;
1073 struct isi_board * card = port->card;
1074 unsigned long flags;
1075
1076 if (!port)
1077 return;
1078 if (isicom_paranoia_check(port, tty->name, "isicom_close"))
1079 return;
1080
1081 #ifdef ISICOM_DEBUG
1082 printk(KERN_DEBUG "ISICOM: Close start!!!.\n");
1083 #endif
1084
1085 save_flags(flags); cli();
1086 if (tty_hung_up_p(filp)) {
1087 restore_flags(flags);
1088 return;
1089 }
1090
1091 if ((tty->count == 1) && (port->count != 1)) {
1092 printk(KERN_WARNING "ISICOM:(0x%x) isicom_close: bad port count"
1093 "tty->count = 1 port count = %d.\n",
1094 card->base, port->count);
1095 port->count = 1;
1096 }
1097 if (--port->count < 0) {
1098 printk(KERN_WARNING "ISICOM:(0x%x) isicom_close: bad port count for"
1099 "channel%d = %d", card->base, port->channel,
1100 port->count);
1101 port->count = 0;
1102 }
1103
1104 if (port->count) {
1105 restore_flags(flags);
1106 return;
1107 }
1108 port->flags |= ASYNC_CLOSING;
1109 tty->closing = 1;
1110 if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1111 tty_wait_until_sent(tty, port->closing_wait);
1112 /* indicate to the card that no more data can be received
1113 on this port */
1114 if (port->flags & ASYNC_INITIALIZED) {
1115 card->port_status &= ~(1 << port->channel);
1116 outw(card->port_status, card->base + 0x02);
1117 }
1118 isicom_shutdown_port(port);
1119 if (tty->driver->flush_buffer)
1120 tty->driver->flush_buffer(tty);
1121
1122 tty_ldisc_flush(tty);
1123 tty->closing = 0;
1124 port->tty = NULL;
1125 if (port->blocked_open) {
1126 if (port->close_delay) {
1127 set_current_state(TASK_INTERRUPTIBLE);
1128 #ifdef ISICOM_DEBUG
1129 printk(KERN_DEBUG "ISICOM: scheduling until time out.\n");
1130 #endif
1131 schedule_timeout(port->close_delay);
1132 }
1133 wake_up_interruptible(&port->open_wait);
1134 }
1135 port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1136 wake_up_interruptible(&port->close_wait);
1137 restore_flags(flags);
1138 #ifdef ISICOM_DEBUG
1139 printk(KERN_DEBUG "ISICOM: Close end!!!.\n");
1140 #endif
1141 }
1142
1143 /* write et all */
1144 static int isicom_write(struct tty_struct * tty, int from_user,
1145 const unsigned char * buf, int count)
1146 {
1147 struct isi_port * port = (struct isi_port *) tty->driver_data;
1148 unsigned long flags;
1149 int cnt, total = 0;
1150 #ifdef ISICOM_DEBUG
1151 printk(KERN_DEBUG "ISICOM: isicom_write for port%d: %d bytes.\n",
1152 port->channel+1, count);
1153 #endif
1154 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
1155 return 0;
1156
1157 if (!tty || !port->xmit_buf || !tmp_buf)
1158 return 0;
1159 if (from_user)
1160 down(&tmp_buf_sem); /* acquire xclusive access to tmp_buf */
1161
1162 save_flags(flags);
1163 while(1) {
1164 cli();
1165 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
1166 SERIAL_XMIT_SIZE - port->xmit_head));
1167 if (cnt <= 0)
1168 break;
1169
1170 if (from_user) {
1171 /* the following may block for paging... hence
1172 enabling interrupts but tx routine may have
1173 created more space in xmit_buf when the ctrl
1174 gets back here */
1175 sti();
1176 if (copy_from_user(tmp_buf, buf, cnt)) {
1177 up(&tmp_buf_sem);
1178 restore_flags(flags);
1179 return -EFAULT;
1180 }
1181 cli();
1182 cnt = min_t(int, cnt, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
1183 SERIAL_XMIT_SIZE - port->xmit_head));
1184 memcpy(port->xmit_buf + port->xmit_head, tmp_buf, cnt);
1185 }
1186 else
1187 memcpy(port->xmit_buf + port->xmit_head, buf, cnt);
1188 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE - 1);
1189 port->xmit_cnt += cnt;
1190 restore_flags(flags);
1191 buf += cnt;
1192 count -= cnt;
1193 total += cnt;
1194 }
1195 if (from_user)
1196 up(&tmp_buf_sem);
1197 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
1198 port->status |= ISI_TXOK;
1199 restore_flags(flags);
1200 #ifdef ISICOM_DEBUG
1201 printk(KERN_DEBUG "ISICOM: isicom_write %d bytes written.\n", total);
1202 #endif
1203 return total;
1204 }
1205
1206 /* put_char et all */
1207 static void isicom_put_char(struct tty_struct * tty, unsigned char ch)
1208 {
1209 struct isi_port * port = (struct isi_port *) tty->driver_data;
1210 unsigned long flags;
1211
1212 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
1213 return;
1214
1215 if (!tty || !port->xmit_buf)
1216 return;
1217 #ifdef ISICOM_DEBUG
1218 printk(KERN_DEBUG "ISICOM: put_char, port %d, char %c.\n", port->channel+1, ch);
1219 #endif
1220
1221 save_flags(flags); cli();
1222
1223 if (port->xmit_cnt >= (SERIAL_XMIT_SIZE - 1)) {
1224 restore_flags(flags);
1225 return;
1226 }
1227
1228 port->xmit_buf[port->xmit_head++] = ch;
1229 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
1230 port->xmit_cnt++;
1231 restore_flags(flags);
1232 }
1233
1234 /* flush_chars et all */
1235 static void isicom_flush_chars(struct tty_struct * tty)
1236 {
1237 struct isi_port * port = (struct isi_port *) tty->driver_data;
1238
1239 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1240 return;
1241
1242 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1243 !port->xmit_buf)
1244 return;
1245
1246 /* this tells the transmitter to consider this port for
1247 data output to the card ... that's the best we can do. */
1248 port->status |= ISI_TXOK;
1249 }
1250
1251 /* write_room et all */
1252 static int isicom_write_room(struct tty_struct * tty)
1253 {
1254 struct isi_port * port = (struct isi_port *) tty->driver_data;
1255 int free;
1256 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1257 return 0;
1258
1259 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1260 if (free < 0)
1261 free = 0;
1262 return free;
1263 }
1264
1265 /* chars_in_buffer et all */
1266 static int isicom_chars_in_buffer(struct tty_struct * tty)
1267 {
1268 struct isi_port * port = (struct isi_port *) tty->driver_data;
1269 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1270 return 0;
1271 return port->xmit_cnt;
1272 }
1273
1274 /* ioctl et all */
1275 static inline void isicom_send_break(struct isi_port * port, unsigned long length)
1276 {
1277 struct isi_board * card = port->card;
1278 short wait = 10;
1279 unsigned short base = card->base;
1280 unsigned long flags;
1281
1282 save_flags(flags); cli();
1283 while (((inw(base + 0x0e) & 0x0001) == 0) && (wait-- > 0));
1284 if (!wait) {
1285 printk(KERN_DEBUG "ISICOM: Card found busy in isicom_send_break.\n");
1286 goto out;
1287 }
1288 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1289 outw((length & 0xff) << 8 | 0x00, base);
1290 outw((length & 0xff00), base);
1291 InterruptTheCard(base);
1292 out: restore_flags(flags);
1293 }
1294
1295 static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
1296 {
1297 struct isi_port * port = (struct isi_port *) tty->driver_data;
1298 /* just send the port status */
1299 unsigned short status = port->status;
1300
1301 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1302 return -ENODEV;
1303
1304 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1305 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1306 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1307 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1308 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1309 ((status & ISI_RI ) ? TIOCM_RI : 0);
1310 }
1311
1312 static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
1313 unsigned int set, unsigned int clear)
1314 {
1315 struct isi_port * port = (struct isi_port *) tty->driver_data;
1316 unsigned long flags;
1317
1318 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1319 return -ENODEV;
1320
1321 save_flags(flags); cli();
1322 if (set & TIOCM_RTS)
1323 raise_rts(port);
1324 if (set & TIOCM_DTR)
1325 raise_dtr(port);
1326
1327 if (clear & TIOCM_RTS)
1328 drop_rts(port);
1329 if (clear & TIOCM_DTR)
1330 drop_dtr(port);
1331
1332 restore_flags(flags);
1333 return 0;
1334 }
1335
1336 static int isicom_set_serial_info(struct isi_port * port,
1337 struct serial_struct __user *info)
1338 {
1339 struct serial_struct newinfo;
1340 unsigned long flags;
1341 int reconfig_port;
1342
1343 if(copy_from_user(&newinfo, info, sizeof(newinfo)))
1344 return -EFAULT;
1345
1346 reconfig_port = ((port->flags & ASYNC_SPD_MASK) !=
1347 (newinfo.flags & ASYNC_SPD_MASK));
1348
1349 if (!capable(CAP_SYS_ADMIN)) {
1350 if ((newinfo.close_delay != port->close_delay) ||
1351 (newinfo.closing_wait != port->closing_wait) ||
1352 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1353 (port->flags & ~ASYNC_USR_MASK)))
1354 return -EPERM;
1355 port->flags = ((port->flags & ~ ASYNC_USR_MASK) |
1356 (newinfo.flags & ASYNC_USR_MASK));
1357 }
1358 else {
1359 port->close_delay = newinfo.close_delay;
1360 port->closing_wait = newinfo.closing_wait;
1361 port->flags = ((port->flags & ~ASYNC_FLAGS) |
1362 (newinfo.flags & ASYNC_FLAGS));
1363 }
1364 if (reconfig_port) {
1365 save_flags(flags); cli();
1366 isicom_config_port(port);
1367 restore_flags(flags);
1368 }
1369 return 0;
1370 }
1371
1372 static int isicom_get_serial_info(struct isi_port * port,
1373 struct serial_struct __user *info)
1374 {
1375 struct serial_struct out_info;
1376
1377 memset(&out_info, 0, sizeof(out_info));
1378 /* out_info.type = ? */
1379 out_info.line = port - isi_ports;
1380 out_info.port = port->card->base;
1381 out_info.irq = port->card->irq;
1382 out_info.flags = port->flags;
1383 /* out_info.baud_base = ? */
1384 out_info.close_delay = port->close_delay;
1385 out_info.closing_wait = port->closing_wait;
1386 if(copy_to_user(info, &out_info, sizeof(out_info)))
1387 return -EFAULT;
1388 return 0;
1389 }
1390
1391 static int isicom_ioctl(struct tty_struct * tty, struct file * filp,
1392 unsigned int cmd, unsigned long arg)
1393 {
1394 struct isi_port * port = (struct isi_port *) tty->driver_data;
1395 void __user *argp = (void __user *)arg;
1396 int retval;
1397
1398 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1399 return -ENODEV;
1400
1401 switch(cmd) {
1402 case TCSBRK:
1403 retval = tty_check_change(tty);
1404 if (retval)
1405 return retval;
1406 tty_wait_until_sent(tty, 0);
1407 if (!arg)
1408 isicom_send_break(port, HZ/4);
1409 return 0;
1410
1411 case TCSBRKP:
1412 retval = tty_check_change(tty);
1413 if (retval)
1414 return retval;
1415 tty_wait_until_sent(tty, 0);
1416 isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4);
1417 return 0;
1418
1419 case TIOCGSOFTCAR:
1420 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1421
1422 case TIOCSSOFTCAR:
1423 if(get_user(arg, (unsigned long __user *) argp))
1424 return -EFAULT;
1425 tty->termios->c_cflag =
1426 ((tty->termios->c_cflag & ~CLOCAL) |
1427 (arg ? CLOCAL : 0));
1428 return 0;
1429
1430 case TIOCGSERIAL:
1431 return isicom_get_serial_info(port, argp);
1432
1433 case TIOCSSERIAL:
1434 return isicom_set_serial_info(port, argp);
1435
1436 default:
1437 return -ENOIOCTLCMD;
1438 }
1439 return 0;
1440 }
1441
1442 /* set_termios et all */
1443 static void isicom_set_termios(struct tty_struct * tty, struct termios * old_termios)
1444 {
1445 struct isi_port * port = (struct isi_port *) tty->driver_data;
1446 unsigned long flags;
1447
1448 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1449 return;
1450
1451 if (tty->termios->c_cflag == old_termios->c_cflag &&
1452 tty->termios->c_iflag == old_termios->c_iflag)
1453 return;
1454
1455 save_flags(flags); cli();
1456 isicom_config_port(port);
1457 restore_flags(flags);
1458
1459 if ((old_termios->c_cflag & CRTSCTS) &&
1460 !(tty->termios->c_cflag & CRTSCTS)) {
1461 tty->hw_stopped = 0;
1462 isicom_start(tty);
1463 }
1464 }
1465
1466 /* throttle et all */
1467 static void isicom_throttle(struct tty_struct * tty)
1468 {
1469 struct isi_port * port = (struct isi_port *) tty->driver_data;
1470 struct isi_board * card = port->card;
1471 unsigned long flags;
1472
1473 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1474 return;
1475
1476 /* tell the card that this port cannot handle any more data for now */
1477 save_flags(flags); cli();
1478 card->port_status &= ~(1 << port->channel);
1479 outw(card->port_status, card->base + 0x02);
1480 restore_flags(flags);
1481 }
1482
1483 /* unthrottle et all */
1484 static void isicom_unthrottle(struct tty_struct * tty)
1485 {
1486 struct isi_port * port = (struct isi_port *) tty->driver_data;
1487 struct isi_board * card = port->card;
1488 unsigned long flags;
1489
1490 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1491 return;
1492
1493 /* tell the card that this port is ready to accept more data */
1494 save_flags(flags); cli();
1495 card->port_status |= (1 << port->channel);
1496 outw(card->port_status, card->base + 0x02);
1497 restore_flags(flags);
1498 }
1499
1500 /* stop et all */
1501 static void isicom_stop(struct tty_struct * tty)
1502 {
1503 struct isi_port * port = (struct isi_port *) tty->driver_data;
1504
1505 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1506 return;
1507
1508 /* this tells the transmitter not to consider this port for
1509 data output to the card. */
1510 port->status &= ~ISI_TXOK;
1511 }
1512
1513 /* start et all */
1514 static void isicom_start(struct tty_struct * tty)
1515 {
1516 struct isi_port * port = (struct isi_port *) tty->driver_data;
1517
1518 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1519 return;
1520
1521 /* this tells the transmitter to consider this port for
1522 data output to the card. */
1523 port->status |= ISI_TXOK;
1524 }
1525
1526 /* hangup et all */
1527 static void do_isicom_hangup(void * data)
1528 {
1529 struct isi_port * port = (struct isi_port *) data;
1530 struct tty_struct * tty;
1531
1532 tty = port->tty;
1533 if (tty)
1534 tty_hangup(tty); /* FIXME: module removal race here - AKPM */
1535 }
1536
1537 static void isicom_hangup(struct tty_struct * tty)
1538 {
1539 struct isi_port * port = (struct isi_port *) tty->driver_data;
1540
1541 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1542 return;
1543
1544 isicom_shutdown_port(port);
1545 port->count = 0;
1546 port->flags &= ~ASYNC_NORMAL_ACTIVE;
1547 port->tty = NULL;
1548 wake_up_interruptible(&port->open_wait);
1549 }
1550
1551 /* flush_buffer et all */
1552 static void isicom_flush_buffer(struct tty_struct * tty)
1553 {
1554 struct isi_port * port = (struct isi_port *) tty->driver_data;
1555 unsigned long flags;
1556
1557 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
1558 return;
1559
1560 save_flags(flags); cli();
1561 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1562 restore_flags(flags);
1563
1564 wake_up_interruptible(&tty->write_wait);
1565 tty_wakeup(tty);
1566 }
1567
1568
1569 static int register_ioregion(void)
1570 {
1571 int count, done=0;
1572 for (count=0; count < BOARD_COUNT; count++ ) {
1573 if (isi_card[count].base)
1574 if (!request_region(isi_card[count].base,16,ISICOM_NAME)) {
1575 printk(KERN_DEBUG "ISICOM: I/O Region 0x%x-0x%x is busy. Card%d will be disabled.\n",
1576 isi_card[count].base,isi_card[count].base+15,count+1);
1577 isi_card[count].base=0;
1578 done++;
1579 }
1580 }
1581 return done;
1582 }
1583
1584 static void unregister_ioregion(void)
1585 {
1586 int count;
1587 for (count=0; count < BOARD_COUNT; count++ )
1588 if (isi_card[count].base) {
1589 release_region(isi_card[count].base,16);
1590 #ifdef ISICOM_DEBUG
1591 printk(KERN_DEBUG "ISICOM: I/O Region 0x%x-0x%x released for Card%d.\n",isi_card[count].base,isi_card[count].base+15,count+1);
1592 #endif
1593 }
1594 }
1595
1596 static struct tty_operations isicom_ops = {
1597 .open = isicom_open,
1598 .close = isicom_close,
1599 .write = isicom_write,
1600 .put_char = isicom_put_char,
1601 .flush_chars = isicom_flush_chars,
1602 .write_room = isicom_write_room,
1603 .chars_in_buffer = isicom_chars_in_buffer,
1604 .ioctl = isicom_ioctl,
1605 .set_termios = isicom_set_termios,
1606 .throttle = isicom_throttle,
1607 .unthrottle = isicom_unthrottle,
1608 .stop = isicom_stop,
1609 .start = isicom_start,
1610 .hangup = isicom_hangup,
1611 .flush_buffer = isicom_flush_buffer,
1612 .tiocmget = isicom_tiocmget,
1613 .tiocmset = isicom_tiocmset,
1614 };
1615
1616 static int register_drivers(void)
1617 {
1618 int error;
1619
1620 /* tty driver structure initialization */
1621 isicom_normal = alloc_tty_driver(PORT_COUNT);
1622 if (!isicom_normal)
1623 return -ENOMEM;
1624
1625 isicom_normal->owner = THIS_MODULE;
1626 isicom_normal->name = "ttyM";
1627 isicom_normal->devfs_name = "isicom/";
1628 isicom_normal->major = ISICOM_NMAJOR;
1629 isicom_normal->minor_start = 0;
1630 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1631 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1632 isicom_normal->init_termios = tty_std_termios;
1633 isicom_normal->init_termios.c_cflag =
1634 B9600 | CS8 | CREAD | HUPCL |CLOCAL;
1635 isicom_normal->flags = TTY_DRIVER_REAL_RAW;
1636 tty_set_operations(isicom_normal, &isicom_ops);
1637
1638 if ((error=tty_register_driver(isicom_normal))!=0) {
1639 printk(KERN_DEBUG "ISICOM: Couldn't register the dialin driver, error=%d\n",
1640 error);
1641 put_tty_driver(isicom_normal);
1642 return error;
1643 }
1644 return 0;
1645 }
1646
1647 static void unregister_drivers(void)
1648 {
1649 int error = tty_unregister_driver(isicom_normal);
1650 if (error)
1651 printk(KERN_DEBUG "ISICOM: couldn't unregister normal driver error=%d.\n",error);
1652 put_tty_driver(isicom_normal);
1653 }
1654
1655 static int register_isr(void)
1656 {
1657 int count, done=0, card;
1658 int flag;
1659 unsigned char request;
1660 for (count=0; count < BOARD_COUNT; count++ ) {
1661 if (isi_card[count].base) {
1662 /*
1663 * verify if the required irq has already been requested for
1664 * another ISI Card, if so we already have it, else request it
1665 */
1666 request = YES;
1667 for(card = 0; card < count; card++)
1668 if ((isi_card[card].base) && (isi_card[card].irq == isi_card[count].irq)) {
1669 request = NO;
1670 if ((isi_card[count].isa == NO) && (isi_card[card].isa == NO))
1671 break;
1672 /*
1673 * ISA cards cannot share interrupts with other
1674 * PCI or ISA devices hence disable this card.
1675 */
1676 release_region(isi_card[count].base,16);
1677 isi_card[count].base = 0;
1678 break;
1679 }
1680 flag=0;
1681 if(isi_card[count].isa == NO)
1682 flag |= SA_SHIRQ;
1683
1684 if (request == YES) {
1685 if (request_irq(isi_card[count].irq, isicom_interrupt, SA_INTERRUPT|flag, ISICOM_NAME, NULL)) {
1686 printk(KERN_WARNING "ISICOM: Could not install handler at Irq %d. Card%d will be disabled.\n",
1687 isi_card[count].irq, count+1);
1688 release_region(isi_card[count].base,16);
1689 isi_card[count].base=0;
1690 }
1691 else {
1692 printk(KERN_INFO "ISICOM: Card%d at 0x%x using irq %d.\n",
1693 count+1, isi_card[count].base, isi_card[count].irq);
1694
1695 irq_to_board[isi_card[count].irq]=&isi_card[count];
1696 done++;
1697 }
1698 }
1699 }
1700 }
1701 return done;
1702 }
1703
1704 static void unregister_isr(void)
1705 {
1706 int count, card;
1707 unsigned char freeirq;
1708 for (count=0; count < BOARD_COUNT; count++ ) {
1709 if (isi_card[count].base) {
1710 freeirq = YES;
1711 for(card = 0; card < count; card++)
1712 if ((isi_card[card].base) && (isi_card[card].irq == isi_card[count].irq)) {
1713 freeirq = NO;
1714 break;
1715 }
1716 if (freeirq == YES) {
1717 free_irq(isi_card[count].irq, NULL);
1718 #ifdef ISICOM_DEBUG
1719 printk(KERN_DEBUG "ISICOM: Irq %d released for Card%d.\n",isi_card[count].irq, count+1);
1720 #endif
1721 }
1722 }
1723 }
1724 }
1725
1726 static int isicom_init(void)
1727 {
1728 int card, channel, base;
1729 struct isi_port * port;
1730 unsigned long page;
1731
1732 if (!tmp_buf) {
1733 page = get_zeroed_page(GFP_KERNEL);
1734 if (!page) {
1735 #ifdef ISICOM_DEBUG
1736 printk(KERN_DEBUG "ISICOM: Couldn't allocate page for tmp_buf.\n");
1737 #else
1738 printk(KERN_ERR "ISICOM: Not enough memory...\n");
1739 #endif
1740 return 0;
1741 }
1742 tmp_buf = (unsigned char *) page;
1743 }
1744
1745 if (!register_ioregion())
1746 {
1747 printk(KERN_ERR "ISICOM: All required I/O space found busy.\n");
1748 free_page((unsigned long)tmp_buf);
1749 return 0;
1750 }
1751 if (register_drivers())
1752 {
1753 unregister_ioregion();
1754 free_page((unsigned long)tmp_buf);
1755 return 0;
1756 }
1757 if (!register_isr())
1758 {
1759 unregister_drivers();
1760 /* ioports already uregistered in register_isr */
1761 free_page((unsigned long)tmp_buf);
1762 return 0;
1763 }
1764
1765 memset(isi_ports, 0, sizeof(isi_ports));
1766 for (card = 0; card < BOARD_COUNT; card++) {
1767 port = &isi_ports[card * 16];
1768 isi_card[card].ports = port;
1769 base = isi_card[card].base;
1770 for (channel = 0; channel < 16; channel++, port++) {
1771 port->magic = ISICOM_MAGIC;
1772 port->card = &isi_card[card];
1773 port->channel = channel;
1774 port->close_delay = 50 * HZ/100;
1775 port->closing_wait = 3000 * HZ/100;
1776 INIT_WORK(&port->hangup_tq, do_isicom_hangup, port);
1777 INIT_WORK(&port->bh_tqueue, isicom_bottomhalf, port);
1778 port->status = 0;
1779 init_waitqueue_head(&port->open_wait);
1780 init_waitqueue_head(&port->close_wait);
1781 /* . . . */
1782 }
1783 }
1784
1785 return 1;
1786 }
1787
1788 /*
1789 * Insmod can set static symbols so keep these static
1790 */
1791
1792 static int io[4];
1793 static int irq[4];
1794
1795 MODULE_AUTHOR("MultiTech");
1796 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1797 MODULE_LICENSE("GPL");
1798 MODULE_PARM(io, "1-4i");
1799 MODULE_PARM_DESC(io, "I/O ports for the cards");
1800 MODULE_PARM(irq, "1-4i");
1801 MODULE_PARM_DESC(irq, "Interrupts for the cards");
1802
1803 int init_module(void)
1804 {
1805 struct pci_dev *dev = NULL;
1806 int retval, card, idx, count;
1807 unsigned char pciirq;
1808 unsigned int ioaddr;
1809
1810 card = 0;
1811 for(idx=0; idx < BOARD_COUNT; idx++) {
1812 if (io[idx]) {
1813 isi_card[idx].base=io[idx];
1814 isi_card[idx].irq=irq[idx];
1815 isi_card[idx].isa=YES;
1816 card++;
1817 }
1818 else {
1819 isi_card[idx].base = 0;
1820 isi_card[idx].irq = 0;
1821 }
1822 }
1823
1824 for (idx=0 ;idx < card; idx++) {
1825 if (!((isi_card[idx].irq==2)||(isi_card[idx].irq==3)||
1826 (isi_card[idx].irq==4)||(isi_card[idx].irq==5)||
1827 (isi_card[idx].irq==7)||(isi_card[idx].irq==10)||
1828 (isi_card[idx].irq==11)||(isi_card[idx].irq==12)||
1829 (isi_card[idx].irq==15))) {
1830
1831 if (isi_card[idx].base) {
1832 printk(KERN_ERR "ISICOM: Irq %d unsupported. Disabling Card%d...\n",
1833 isi_card[idx].irq, idx+1);
1834 isi_card[idx].base=0;
1835 card--;
1836 }
1837 }
1838 }
1839
1840 if (card < BOARD_COUNT) {
1841 for (idx=0; idx < DEVID_COUNT; idx++) {
1842 dev = NULL;
1843 for (;;){
1844 if (!(dev = pci_find_device(VENDOR_ID, isicom_pci_tbl[idx].device, dev)))
1845 break;
1846 if (card >= BOARD_COUNT)
1847 break;
1848
1849 if (pci_enable_device(dev))
1850 break;
1851
1852 /* found a PCI ISI card! */
1853 ioaddr = pci_resource_start (dev, 3); /* i.e at offset 0x1c in the
1854 * PCI configuration register
1855 * space.
1856 */
1857 pciirq = dev->irq;
1858 printk(KERN_INFO "ISI PCI Card(Device ID 0x%x)\n", isicom_pci_tbl[idx].device);
1859 /*
1860 * allot the first empty slot in the array
1861 */
1862 for (count=0; count < BOARD_COUNT; count++) {
1863 if (isi_card[count].base == 0) {
1864 isi_card[count].base = ioaddr;
1865 isi_card[count].irq = pciirq;
1866 isi_card[count].isa = NO;
1867 card++;
1868 break;
1869 }
1870 }
1871 }
1872 if (card >= BOARD_COUNT) break;
1873 }
1874 }
1875
1876 if (!(isi_card[0].base || isi_card[1].base || isi_card[2].base || isi_card[3].base)) {
1877 printk(KERN_ERR "ISICOM: No valid card configuration. Driver cannot be initialized...\n");
1878 return -EIO;
1879 }
1880
1881 retval = misc_register(&isiloader_device);
1882 if (retval < 0) {
1883 printk(KERN_ERR "ISICOM: Unable to register firmware loader driver.\n");
1884 return retval;
1885 }
1886
1887 if (!isicom_init()) {
1888 if (misc_deregister(&isiloader_device))
1889 printk(KERN_ERR "ISICOM: Unable to unregister Firmware Loader driver\n");
1890 return -EIO;
1891 }
1892
1893 init_timer(&tx);
1894 tx.expires = jiffies + 1;
1895 tx.data = 0;
1896 tx.function = isicom_tx;
1897 re_schedule = 1;
1898 add_timer(&tx);
1899
1900 return 0;
1901 }
1902
1903 void cleanup_module(void)
1904 {
1905 re_schedule = 0;
1906 msleep(1000);
1907
1908 #ifdef ISICOM_DEBUG
1909 printk("ISICOM: isicom_tx tx_count = %ld.\n", tx_count);
1910 #endif
1911
1912 #ifdef ISICOM_DEBUG
1913 printk("ISICOM: uregistering isr ...\n");
1914 #endif
1915 unregister_isr();
1916
1917 #ifdef ISICOM_DEBUG
1918 printk("ISICOM: unregistering drivers ...\n");
1919 #endif
1920 unregister_drivers();
1921
1922 #ifdef ISICOM_DEBUG
1923 printk("ISICOM: unregistering ioregion ...\n");
1924 #endif
1925 unregister_ioregion();
1926
1927 #ifdef ISICOM_DEBUG
1928 printk("ISICOM: freeing tmp_buf ...\n");
1929 #endif
1930 free_page((unsigned long)tmp_buf);
1931
1932 #ifdef ISICOM_DEBUG
1933 printk("ISICOM: unregistering firmware loader ...\n");
1934 #endif
1935 if (misc_deregister(&isiloader_device))
1936 printk(KERN_ERR "ISICOM: Unable to unregister Firmware Loader driver\n");
1937 }
MOXA 2.6.9 from sdlinux-moxaart.tgz