Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * This program is free software; you can redistribute it and/or | |
3 | * modify it under the terms of the GNU General Public License | |
4 | * as published by the Free Software Foundation; either version | |
5 | * 2 of the License, or (at your option) any later version. | |
6 | * | |
7 | * Original driver code supplied by Multi-Tech | |
8 | * | |
9 | * Changes | |
10 | * 1/9/98 alan@redhat.com Merge to 2.0.x kernel tree | |
11 | * Obtain and use official major/minors | |
12 | * Loader switched to a misc device | |
13 | * (fixed range check bug as a side effect) | |
14 | * Printk clean up | |
15 | * 9/12/98 alan@redhat.com Rough port to 2.1.x | |
16 | * | |
17 | * 10/6/99 sameer Merged the ISA and PCI drivers to | |
18 | * a new unified driver. | |
19 | * | |
20 | * 3/9/99 sameer Added support for ISI4616 cards. | |
21 | * | |
22 | * 16/9/99 sameer We do not force RTS low anymore. | |
23 | * This is to prevent the firmware | |
24 | * from getting confused. | |
25 | * | |
26 | * 26/10/99 sameer Cosmetic changes:The driver now | |
27 | * dumps the Port Count information | |
28 | * along with I/O address and IRQ. | |
29 | * | |
30 | * 13/12/99 sameer Fixed the problem with IRQ sharing. | |
31 | * | |
32 | * 10/5/00 sameer Fixed isicom_shutdown_board() | |
33 | * to not lower DTR on all the ports | |
34 | * when the last port on the card is | |
35 | * closed. | |
36 | * | |
37 | * 10/5/00 sameer Signal mask setup command added | |
38 | * to isicom_setup_port and | |
39 | * isicom_shutdown_port. | |
40 | * | |
41 | * 24/5/00 sameer The driver is now SMP aware. | |
42 | * | |
43 | * | |
44 | * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem | |
45 | * | |
46 | * | |
47 | * 03/01/01 anil .s Added support for resetting the | |
48 | * internal modems on ISI cards. | |
49 | * | |
50 | * 08/02/01 anil .s Upgraded the driver for kernel | |
51 | * 2.4.x | |
52 | * | |
53 | * 11/04/01 Kevin Fixed firmware load problem with | |
54 | * ISIHP-4X card | |
55 | * | |
56 | * 30/04/01 anil .s Fixed the remote login through | |
57 | * ISI port problem. Now the link | |
58 | * does not go down before password | |
59 | * prompt. | |
60 | * | |
61 | * 03/05/01 anil .s Fixed the problem with IRQ sharing | |
62 | * among ISI-PCI cards. | |
63 | * | |
64 | * 03/05/01 anil .s Added support to display the version | |
65 | * info during insmod as well as module | |
66 | * listing by lsmod. | |
67 | * | |
68 | * 10/05/01 anil .s Done the modifications to the source | |
69 | * file and Install script so that the | |
70 | * same installation can be used for | |
71 | * 2.2.x and 2.4.x kernel. | |
72 | * | |
73 | * 06/06/01 anil .s Now we drop both dtr and rts during | |
74 | * shutdown_port as well as raise them | |
75 | * during isicom_config_port. | |
76 | * | |
77 | * 09/06/01 acme@conectiva.com.br use capable, not suser, do | |
78 | * restore_flags on failure in | |
79 | * isicom_send_break, verify put_user | |
80 | * result | |
81 | * | |
82 | * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps | |
83 | * Baud index extended to 21 | |
84 | * | |
85 | * 20/03/03 ranjeeth Made to work for Linux Advanced server. | |
86 | * Taken care of license warning. | |
87 | * | |
88 | * 10/12/03 Ravindra Made to work for Fedora Core 1 of | |
89 | * Red Hat Distribution | |
90 | * | |
91 | * 06/01/05 Alan Cox Merged the ISI and base kernel strands | |
92 | * into a single 2.6 driver | |
93 | * | |
94 | * *********************************************************** | |
95 | * | |
96 | * To use this driver you also need the support package. You | |
97 | * can find this in RPM format on | |
98 | * ftp://ftp.linux.org.uk/pub/linux/alan | |
99 | * | |
100 | * You can find the original tools for this direct from Multitech | |
101 | * ftp://ftp.multitech.com/ISI-Cards/ | |
102 | * | |
103 | * Having installed the cards the module options (/etc/modprobe.conf) | |
104 | * | |
105 | * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4 | |
106 | * | |
107 | * Omit those entries for boards you don't have installed. | |
108 | * | |
109 | * TODO | |
110 | * Hotplug | |
111 | * Merge testing | |
112 | * 64-bit verification | |
113 | */ | |
114 | ||
115 | #include <linux/module.h> | |
116 | #include <linux/kernel.h> | |
117 | #include <linux/tty.h> | |
118 | #include <linux/termios.h> | |
119 | #include <linux/fs.h> | |
120 | #include <linux/sched.h> | |
121 | #include <linux/serial.h> | |
122 | #include <linux/mm.h> | |
123 | #include <linux/miscdevice.h> | |
124 | #include <linux/interrupt.h> | |
125 | #include <linux/timer.h> | |
126 | #include <linux/delay.h> | |
127 | #include <linux/ioport.h> | |
128 | ||
129 | #include <asm/uaccess.h> | |
130 | #include <asm/io.h> | |
131 | #include <asm/system.h> | |
132 | ||
133 | #include <linux/pci.h> | |
134 | ||
135 | #include <linux/isicom.h> | |
136 | ||
137 | static struct pci_device_id isicom_pci_tbl[] = { | |
138 | { VENDOR_ID, 0x2028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, | |
139 | { VENDOR_ID, 0x2051, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, | |
140 | { VENDOR_ID, 0x2052, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, | |
141 | { VENDOR_ID, 0x2053, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, | |
142 | { VENDOR_ID, 0x2054, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, | |
143 | { VENDOR_ID, 0x2055, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, | |
144 | { VENDOR_ID, 0x2056, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, | |
145 | { VENDOR_ID, 0x2057, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, | |
146 | { VENDOR_ID, 0x2058, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, | |
147 | { 0 } | |
148 | }; | |
149 | MODULE_DEVICE_TABLE(pci, isicom_pci_tbl); | |
150 | ||
151 | static int prev_card = 3; /* start servicing isi_card[0] */ | |
152 | static struct tty_driver *isicom_normal; | |
153 | ||
154 | static struct timer_list tx; | |
155 | static char re_schedule = 1; | |
156 | #ifdef ISICOM_DEBUG | |
157 | static unsigned long tx_count = 0; | |
158 | #endif | |
159 | ||
160 | static int ISILoad_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); | |
161 | ||
162 | static void isicom_tx(unsigned long _data); | |
163 | static void isicom_start(struct tty_struct * tty); | |
164 | ||
165 | static unsigned char * tmp_buf; | |
166 | static DECLARE_MUTEX(tmp_buf_sem); | |
167 | ||
168 | /* baud index mappings from linux defns to isi */ | |
169 | ||
170 | static signed char linuxb_to_isib[] = { | |
171 | -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, | |
172 | 18, 19 | |
173 | }; | |
174 | ||
175 | struct isi_board { | |
176 | unsigned short base; | |
177 | unsigned char irq; | |
178 | unsigned char port_count; | |
179 | unsigned short status; | |
180 | unsigned short port_status; /* each bit represents a single port */ | |
181 | unsigned short shift_count; | |
182 | struct isi_port * ports; | |
183 | signed char count; | |
184 | unsigned char isa; | |
185 | spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */ | |
186 | unsigned long flags; | |
187 | }; | |
188 | ||
189 | struct isi_port { | |
190 | unsigned short magic; | |
191 | unsigned int flags; | |
192 | int count; | |
193 | int blocked_open; | |
194 | int close_delay; | |
195 | unsigned short channel; | |
196 | unsigned short status; | |
197 | unsigned short closing_wait; | |
198 | struct isi_board * card; | |
199 | struct tty_struct * tty; | |
200 | wait_queue_head_t close_wait; | |
201 | wait_queue_head_t open_wait; | |
202 | struct work_struct hangup_tq; | |
203 | struct work_struct bh_tqueue; | |
204 | unsigned char * xmit_buf; | |
205 | int xmit_head; | |
206 | int xmit_tail; | |
207 | int xmit_cnt; | |
208 | }; | |
209 | ||
210 | static struct isi_board isi_card[BOARD_COUNT]; | |
211 | static struct isi_port isi_ports[PORT_COUNT]; | |
212 | ||
213 | /* | |
214 | * Locking functions for card level locking. We need to own both | |
215 | * the kernel lock for the card and have the card in a position that | |
216 | * it wants to talk. | |
217 | */ | |
218 | ||
219 | static int lock_card(struct isi_board *card) | |
220 | { | |
221 | char retries; | |
222 | unsigned short base = card->base; | |
223 | ||
224 | for (retries = 0; retries < 100; retries++) { | |
225 | spin_lock_irqsave(&card->card_lock, card->flags); | |
226 | if (inw(base + 0xe) & 0x1) { | |
227 | return 1; | |
228 | } else { | |
229 | spin_unlock_irqrestore(&card->card_lock, card->flags); | |
230 | udelay(1000); /* 1ms */ | |
231 | } | |
232 | } | |
233 | printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%x)\n", card->base); | |
234 | return 0; /* Failed to aquire the card! */ | |
235 | } | |
236 | ||
237 | static int lock_card_at_interrupt(struct isi_board *card) | |
238 | { | |
239 | unsigned char retries; | |
240 | unsigned short base = card->base; | |
241 | ||
242 | for (retries = 0; retries < 200; retries++) { | |
243 | spin_lock_irqsave(&card->card_lock, card->flags); | |
244 | ||
245 | if (inw(base + 0xe) & 0x1) | |
246 | return 1; | |
247 | else | |
248 | spin_unlock_irqrestore(&card->card_lock, card->flags); | |
249 | } | |
250 | /* Failing in interrupt is an acceptable event */ | |
251 | return 0; /* Failed to aquire the card! */ | |
252 | } | |
253 | ||
254 | static void unlock_card(struct isi_board *card) | |
255 | { | |
256 | spin_unlock_irqrestore(&card->card_lock, card->flags); | |
257 | } | |
258 | ||
259 | /* | |
260 | * ISI Card specific ops ... | |
261 | */ | |
262 | ||
263 | static void raise_dtr(struct isi_port * port) | |
264 | { | |
265 | struct isi_board * card = port->card; | |
266 | unsigned short base = card->base; | |
267 | unsigned char channel = port->channel; | |
268 | ||
269 | if (!lock_card(card)) | |
270 | return; | |
271 | ||
272 | outw(0x8000 | (channel << card->shift_count) | 0x02 , base); | |
273 | outw(0x0504, base); | |
274 | InterruptTheCard(base); | |
275 | port->status |= ISI_DTR; | |
276 | unlock_card(card); | |
277 | } | |
278 | ||
279 | static inline void drop_dtr(struct isi_port * port) | |
280 | { | |
281 | struct isi_board * card = port->card; | |
282 | unsigned short base = card->base; | |
283 | unsigned char channel = port->channel; | |
284 | ||
285 | if (!lock_card(card)) | |
286 | return; | |
287 | ||
288 | outw(0x8000 | (channel << card->shift_count) | 0x02 , base); | |
289 | outw(0x0404, base); | |
290 | InterruptTheCard(base); | |
291 | port->status &= ~ISI_DTR; | |
292 | unlock_card(card); | |
293 | } | |
294 | ||
295 | static inline void raise_rts(struct isi_port * port) | |
296 | { | |
297 | struct isi_board * card = port->card; | |
298 | unsigned short base = card->base; | |
299 | unsigned char channel = port->channel; | |
300 | ||
301 | if (!lock_card(card)) | |
302 | return; | |
303 | ||
304 | outw(0x8000 | (channel << card->shift_count) | 0x02 , base); | |
305 | outw(0x0a04, base); | |
306 | InterruptTheCard(base); | |
307 | port->status |= ISI_RTS; | |
308 | unlock_card(card); | |
309 | } | |
310 | static inline void drop_rts(struct isi_port * port) | |
311 | { | |
312 | struct isi_board * card = port->card; | |
313 | unsigned short base = card->base; | |
314 | unsigned char channel = port->channel; | |
315 | ||
316 | if (!lock_card(card)) | |
317 | return; | |
318 | ||
319 | outw(0x8000 | (channel << card->shift_count) | 0x02 , base); | |
320 | outw(0x0804, base); | |
321 | InterruptTheCard(base); | |
322 | port->status &= ~ISI_RTS; | |
323 | unlock_card(card); | |
324 | } | |
325 | ||
326 | static inline void raise_dtr_rts(struct isi_port * port) | |
327 | { | |
328 | struct isi_board * card = port->card; | |
329 | unsigned short base = card->base; | |
330 | unsigned char channel = port->channel; | |
331 | ||
332 | if (!lock_card(card)) | |
333 | return; | |
334 | ||
335 | outw(0x8000 | (channel << card->shift_count) | 0x02 , base); | |
336 | outw(0x0f04, base); | |
337 | InterruptTheCard(base); | |
338 | port->status |= (ISI_DTR | ISI_RTS); | |
339 | unlock_card(card); | |
340 | } | |
341 | ||
342 | static void drop_dtr_rts(struct isi_port * port) | |
343 | { | |
344 | struct isi_board * card = port->card; | |
345 | unsigned short base = card->base; | |
346 | unsigned char channel = port->channel; | |
347 | ||
348 | if (!lock_card(card)) | |
349 | return; | |
350 | ||
351 | outw(0x8000 | (channel << card->shift_count) | 0x02 , base); | |
352 | outw(0x0c04, base); | |
353 | InterruptTheCard(base); | |
354 | port->status &= ~(ISI_RTS | ISI_DTR); | |
355 | unlock_card(card); | |
356 | } | |
357 | ||
358 | static inline void kill_queue(struct isi_port * port, short queue) | |
359 | { | |
360 | struct isi_board * card = port->card; | |
361 | unsigned short base = card->base; | |
362 | unsigned char channel = port->channel; | |
363 | ||
364 | if (!lock_card(card)) | |
365 | return; | |
366 | ||
367 | outw(0x8000 | (channel << card->shift_count) | 0x02 , base); | |
368 | outw((queue << 8) | 0x06, base); | |
369 | InterruptTheCard(base); | |
370 | unlock_card(card); | |
371 | } | |
372 | ||
373 | ||
374 | /* | |
375 | * Firmware loader driver specific routines. This needs to mostly die | |
376 | * and be replaced with request_firmware. | |
377 | */ | |
378 | ||
379 | static struct file_operations ISILoad_fops = { | |
380 | .owner = THIS_MODULE, | |
381 | .ioctl = ISILoad_ioctl, | |
382 | }; | |
383 | ||
384 | static struct miscdevice isiloader_device = { | |
385 | ISILOAD_MISC_MINOR, "isictl", &ISILoad_fops | |
386 | }; | |
387 | ||
388 | ||
389 | static inline int WaitTillCardIsFree(unsigned short base) | |
390 | { | |
391 | unsigned long count=0; | |
392 | while( (!(inw(base+0xe) & 0x1)) && (count++ < 6000000)); | |
393 | if (inw(base+0xe)&0x1) | |
394 | return 0; | |
395 | else | |
396 | return 1; | |
397 | } | |
398 | ||
399 | static int ISILoad_ioctl(struct inode *inode, struct file *filp, | |
400 | unsigned int cmd, unsigned long arg) | |
401 | { | |
402 | unsigned int card, i, j, signature, status, portcount = 0; | |
403 | unsigned long t; | |
404 | unsigned short word_count, base; | |
405 | bin_frame frame; | |
406 | void __user *argp = (void __user *)arg; | |
407 | /* exec_record exec_rec; */ | |
408 | ||
409 | if(get_user(card, (int __user *)argp)) | |
410 | return -EFAULT; | |
411 | ||
412 | if(card < 0 || card >= BOARD_COUNT) | |
413 | return -ENXIO; | |
414 | ||
415 | base=isi_card[card].base; | |
416 | ||
417 | if(base==0) | |
418 | return -ENXIO; /* disabled or not used */ | |
419 | ||
420 | switch(cmd) { | |
421 | case MIOCTL_RESET_CARD: | |
422 | if (!capable(CAP_SYS_ADMIN)) | |
423 | return -EPERM; | |
424 | printk(KERN_DEBUG "ISILoad:Resetting Card%d at 0x%x ",card+1,base); | |
425 | ||
426 | inw(base+0x8); | |
427 | ||
428 | for(t=jiffies+HZ/100;time_before(jiffies, t);); | |
429 | ||
430 | outw(0,base+0x8); /* Reset */ | |
431 | ||
432 | for(j=1;j<=3;j++) { | |
433 | for(t=jiffies+HZ;time_before(jiffies, t);); | |
434 | printk("."); | |
435 | } | |
436 | signature=(inw(base+0x4)) & 0xff; | |
437 | if (isi_card[card].isa) { | |
438 | ||
439 | if (!(inw(base+0xe) & 0x1) || (inw(base+0x2))) { | |
440 | #ifdef ISICOM_DEBUG | |
441 | printk("\nbase+0x2=0x%x , base+0xe=0x%x",inw(base+0x2),inw(base+0xe)); | |
442 | #endif | |
443 | printk("\nISILoad:ISA Card%d reset failure (Possible bad I/O Port Address 0x%x).\n",card+1,base); | |
444 | return -EIO; | |
445 | } | |
446 | } | |
447 | else { | |
448 | portcount = inw(base+0x2); | |
449 | if (!(inw(base+0xe) & 0x1) || ((portcount!=0) && (portcount!=4) && (portcount!=8))) { | |
450 | #ifdef ISICOM_DEBUG | |
451 | printk("\nbase+0x2=0x%x , base+0xe=0x%x",inw(base+0x2),inw(base+0xe)); | |
452 | #endif | |
453 | printk("\nISILoad:PCI Card%d reset failure (Possible bad I/O Port Address 0x%x).\n",card+1,base); | |
454 | return -EIO; | |
455 | } | |
456 | } | |
457 | switch(signature) { | |
458 | case 0xa5: | |
459 | case 0xbb: | |
460 | case 0xdd: | |
461 | if (isi_card[card].isa) | |
462 | isi_card[card].port_count = 8; | |
463 | else { | |
464 | if (portcount == 4) | |
465 | isi_card[card].port_count = 4; | |
466 | else | |
467 | isi_card[card].port_count = 8; | |
468 | } | |
469 | isi_card[card].shift_count = 12; | |
470 | break; | |
471 | ||
472 | case 0xcc: isi_card[card].port_count = 16; | |
473 | isi_card[card].shift_count = 11; | |
474 | break; | |
475 | ||
476 | default: printk("ISILoad:Card%d reset failure (Possible bad I/O Port Address 0x%x).\n",card+1,base); | |
477 | #ifdef ISICOM_DEBUG | |
478 | printk("Sig=0x%x\n",signature); | |
479 | #endif | |
480 | return -EIO; | |
481 | } | |
482 | printk("-Done\n"); | |
483 | return put_user(signature,(unsigned __user *)argp); | |
484 | ||
485 | case MIOCTL_LOAD_FIRMWARE: | |
486 | if (!capable(CAP_SYS_ADMIN)) | |
487 | return -EPERM; | |
488 | ||
489 | if(copy_from_user(&frame, argp, sizeof(bin_frame))) | |
490 | return -EFAULT; | |
491 | ||
492 | if (WaitTillCardIsFree(base)) | |
493 | return -EIO; | |
494 | ||
495 | outw(0xf0,base); /* start upload sequence */ | |
496 | outw(0x00,base); | |
497 | outw((frame.addr), base);/* lsb of adderess */ | |
498 | ||
499 | word_count=(frame.count >> 1) + frame.count % 2; | |
500 | outw(word_count, base); | |
501 | InterruptTheCard(base); | |
502 | ||
503 | for(i=0;i<=0x2f;i++); /* a wee bit of delay */ | |
504 | ||
505 | if (WaitTillCardIsFree(base)) | |
506 | return -EIO; | |
507 | ||
508 | if ((status=inw(base+0x4))!=0) { | |
509 | printk(KERN_WARNING "ISILoad:Card%d rejected load header:\nAddress:0x%x \nCount:0x%x \nStatus:0x%x \n", | |
510 | card+1, frame.addr, frame.count, status); | |
511 | return -EIO; | |
512 | } | |
513 | outsw(base, (void *) frame.bin_data, word_count); | |
514 | ||
515 | InterruptTheCard(base); | |
516 | ||
517 | for(i=0;i<=0x0f;i++); /* another wee bit of delay */ | |
518 | ||
519 | if (WaitTillCardIsFree(base)) | |
520 | return -EIO; | |
521 | ||
522 | if ((status=inw(base+0x4))!=0) { | |
523 | printk(KERN_ERR "ISILoad:Card%d got out of sync.Card Status:0x%x\n",card+1, status); | |
524 | return -EIO; | |
525 | } | |
526 | return 0; | |
527 | ||
528 | case MIOCTL_READ_FIRMWARE: | |
529 | if (!capable(CAP_SYS_ADMIN)) | |
530 | return -EPERM; | |
531 | ||
532 | if(copy_from_user(&frame, argp, sizeof(bin_header))) | |
533 | return -EFAULT; | |
534 | ||
535 | if (WaitTillCardIsFree(base)) | |
536 | return -EIO; | |
537 | ||
538 | outw(0xf1,base); /* start download sequence */ | |
539 | outw(0x00,base); | |
540 | outw((frame.addr), base);/* lsb of adderess */ | |
541 | ||
542 | word_count=(frame.count >> 1) + frame.count % 2; | |
543 | outw(word_count+1, base); | |
544 | InterruptTheCard(base); | |
545 | ||
546 | for(i=0;i<=0xf;i++); /* a wee bit of delay */ | |
547 | ||
548 | if (WaitTillCardIsFree(base)) | |
549 | return -EIO; | |
550 | ||
551 | if ((status=inw(base+0x4))!=0) { | |
552 | printk(KERN_WARNING "ISILoad:Card%d rejected verify header:\nAddress:0x%x \nCount:0x%x \nStatus:0x%x \n", | |
553 | card+1, frame.addr, frame.count, status); | |
554 | return -EIO; | |
555 | } | |
556 | ||
557 | inw(base); | |
558 | insw(base, frame.bin_data, word_count); | |
559 | InterruptTheCard(base); | |
560 | ||
561 | for(i=0;i<=0x0f;i++); /* another wee bit of delay */ | |
562 | ||
563 | if (WaitTillCardIsFree(base)) | |
564 | return -EIO; | |
565 | ||
566 | if ((status=inw(base+0x4))!=0) { | |
567 | printk(KERN_ERR "ISILoad:Card%d verify got out of sync.Card Status:0x%x\n",card+1, status); | |
568 | return -EIO; | |
569 | } | |
570 | ||
571 | if(copy_to_user(argp, &frame, sizeof(bin_frame))) | |
572 | return -EFAULT; | |
573 | return 0; | |
574 | ||
575 | case MIOCTL_XFER_CTRL: | |
576 | if (!capable(CAP_SYS_ADMIN)) | |
577 | return -EPERM; | |
578 | if (WaitTillCardIsFree(base)) | |
579 | return -EIO; | |
580 | ||
581 | outw(0xf2, base); | |
582 | outw(0x800, base); | |
583 | outw(0x0, base); | |
584 | outw(0x0, base); | |
585 | InterruptTheCard(base); | |
586 | outw(0x0, base+0x4); /* for ISI4608 cards */ | |
587 | ||
588 | isi_card[card].status |= FIRMWARE_LOADED; | |
589 | return 0; | |
590 | ||
591 | default: | |
592 | #ifdef ISICOM_DEBUG | |
593 | printk(KERN_DEBUG "ISILoad: Received Ioctl cmd 0x%x.\n", cmd); | |
594 | #endif | |
595 | return -ENOIOCTLCMD; | |
596 | ||
597 | } | |
598 | ||
599 | } | |
600 | ||
601 | ||
602 | /* | |
603 | * ISICOM Driver specific routines ... | |
604 | * | |
605 | */ | |
606 | ||
607 | static inline int isicom_paranoia_check(struct isi_port const * port, char *name, | |
608 | const char * routine) | |
609 | { | |
610 | #ifdef ISICOM_DEBUG | |
611 | static const char * badmagic = | |
612 | KERN_WARNING "ISICOM: Warning: bad isicom magic for dev %s in %s.\n"; | |
613 | static const char * badport = | |
614 | KERN_WARNING "ISICOM: Warning: NULL isicom port for dev %s in %s.\n"; | |
615 | if (!port) { | |
616 | printk(badport, name, routine); | |
617 | return 1; | |
618 | } | |
619 | if (port->magic != ISICOM_MAGIC) { | |
620 | printk(badmagic, name, routine); | |
621 | return 1; | |
622 | } | |
623 | #endif | |
624 | return 0; | |
625 | } | |
626 | ||
627 | /* | |
628 | * Transmitter. | |
629 | * | |
630 | * We shovel data into the card buffers on a regular basis. The card | |
631 | * will do the rest of the work for us. | |
632 | */ | |
633 | ||
634 | static void isicom_tx(unsigned long _data) | |
635 | { | |
636 | short count = (BOARD_COUNT-1), card, base; | |
637 | short txcount, wrd, residue, word_count, cnt; | |
638 | struct isi_port * port; | |
639 | struct tty_struct * tty; | |
640 | ||
641 | #ifdef ISICOM_DEBUG | |
642 | ++tx_count; | |
643 | #endif | |
644 | ||
645 | /* find next active board */ | |
646 | card = (prev_card + 1) & 0x0003; | |
647 | while(count-- > 0) { | |
648 | if (isi_card[card].status & BOARD_ACTIVE) | |
649 | break; | |
650 | card = (card + 1) & 0x0003; | |
651 | } | |
652 | if (!(isi_card[card].status & BOARD_ACTIVE)) | |
653 | goto sched_again; | |
654 | ||
655 | prev_card = card; | |
656 | ||
657 | count = isi_card[card].port_count; | |
658 | port = isi_card[card].ports; | |
659 | base = isi_card[card].base; | |
660 | for (;count > 0;count--, port++) { | |
661 | if (!lock_card_at_interrupt(&isi_card[card])) | |
662 | continue; | |
663 | /* port not active or tx disabled to force flow control */ | |
664 | if (!(port->flags & ASYNC_INITIALIZED) || | |
665 | !(port->status & ISI_TXOK)) | |
666 | unlock_card(&isi_card[card]); | |
667 | continue; | |
668 | ||
669 | tty = port->tty; | |
670 | ||
671 | ||
672 | if(tty == NULL) { | |
673 | unlock_card(&isi_card[card]); | |
674 | continue; | |
675 | } | |
676 | ||
677 | txcount = min_t(short, TX_SIZE, port->xmit_cnt); | |
678 | if (txcount <= 0 || tty->stopped || tty->hw_stopped) { | |
679 | unlock_card(&isi_card[card]); | |
680 | continue; | |
681 | } | |
682 | if (!(inw(base + 0x02) & (1 << port->channel))) { | |
683 | unlock_card(&isi_card[card]); | |
684 | continue; | |
685 | } | |
686 | #ifdef ISICOM_DEBUG | |
687 | printk(KERN_DEBUG "ISICOM: txing %d bytes, port%d.\n", | |
688 | txcount, port->channel+1); | |
689 | #endif | |
690 | outw((port->channel << isi_card[card].shift_count) | txcount | |
691 | , base); | |
692 | residue = NO; | |
693 | wrd = 0; | |
694 | while (1) { | |
695 | cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE - port->xmit_tail)); | |
696 | if (residue == YES) { | |
697 | residue = NO; | |
698 | if (cnt > 0) { | |
699 | wrd |= (port->xmit_buf[port->xmit_tail] << 8); | |
700 | port->xmit_tail = (port->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1); | |
701 | port->xmit_cnt--; | |
702 | txcount--; | |
703 | cnt--; | |
704 | outw(wrd, base); | |
705 | } | |
706 | else { | |
707 | outw(wrd, base); | |
708 | break; | |
709 | } | |
710 | } | |
711 | if (cnt <= 0) break; | |
712 | word_count = cnt >> 1; | |
713 | outsw(base, port->xmit_buf+port->xmit_tail, word_count); | |
714 | port->xmit_tail = (port->xmit_tail + (word_count << 1)) & | |
715 | (SERIAL_XMIT_SIZE - 1); | |
716 | txcount -= (word_count << 1); | |
717 | port->xmit_cnt -= (word_count << 1); | |
718 | if (cnt & 0x0001) { | |
719 | residue = YES; | |
720 | wrd = port->xmit_buf[port->xmit_tail]; | |
721 | port->xmit_tail = (port->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1); | |
722 | port->xmit_cnt--; | |
723 | txcount--; | |
724 | } | |
725 | } | |
726 | ||
727 | InterruptTheCard(base); | |
728 | if (port->xmit_cnt <= 0) | |
729 | port->status &= ~ISI_TXOK; | |
730 | if (port->xmit_cnt <= WAKEUP_CHARS) | |
731 | schedule_work(&port->bh_tqueue); | |
732 | unlock_card(&isi_card[card]); | |
733 | } | |
734 | ||
735 | /* schedule another tx for hopefully in about 10ms */ | |
736 | sched_again: | |
737 | if (!re_schedule) | |
738 | return; | |
739 | init_timer(&tx); | |
740 | tx.expires = jiffies + HZ/100; | |
741 | tx.data = 0; | |
742 | tx.function = isicom_tx; | |
743 | add_timer(&tx); | |
744 | ||
745 | return; | |
746 | } | |
747 | ||
748 | /* Interrupt handlers */ | |
749 | ||
750 | ||
751 | static void isicom_bottomhalf(void * data) | |
752 | { | |
753 | struct isi_port * port = (struct isi_port *) data; | |
754 | struct tty_struct * tty = port->tty; | |
755 | ||
756 | if (!tty) | |
757 | return; | |
758 | ||
759 | tty_wakeup(tty); | |
760 | wake_up_interruptible(&tty->write_wait); | |
761 | } | |
762 | ||
763 | /* | |
764 | * Main interrupt handler routine | |
765 | */ | |
766 | ||
767 | static irqreturn_t isicom_interrupt(int irq, void *dev_id, | |
768 | struct pt_regs *regs) | |
769 | { | |
770 | struct isi_board * card; | |
771 | struct isi_port * port; | |
772 | struct tty_struct * tty; | |
773 | unsigned short base, header, word_count, count; | |
774 | unsigned char channel; | |
775 | short byte_count; | |
776 | ||
777 | card = (struct isi_board *) dev_id; | |
778 | ||
779 | if (!card || !(card->status & FIRMWARE_LOADED)) | |
780 | return IRQ_NONE; | |
781 | ||
782 | base = card->base; | |
783 | spin_lock(&card->card_lock); | |
784 | ||
785 | if (card->isa == NO) { | |
786 | /* | |
787 | * disable any interrupts from the PCI card and lower the | |
788 | * interrupt line | |
789 | */ | |
790 | outw(0x8000, base+0x04); | |
791 | ClearInterrupt(base); | |
792 | } | |
793 | ||
794 | inw(base); /* get the dummy word out */ | |
795 | header = inw(base); | |
796 | channel = (header & 0x7800) >> card->shift_count; | |
797 | byte_count = header & 0xff; | |
798 | ||
799 | if (channel + 1 > card->port_count) { | |
800 | printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%x): %d(channel) > port_count.\n", | |
801 | base, channel+1); | |
802 | if (card->isa) | |
803 | ClearInterrupt(base); | |
804 | else | |
805 | outw(0x0000, base+0x04); /* enable interrupts */ | |
806 | spin_unlock(&card->card_lock); | |
807 | return IRQ_HANDLED; | |
808 | } | |
809 | port = card->ports + channel; | |
810 | if (!(port->flags & ASYNC_INITIALIZED)) { | |
811 | if (card->isa) | |
812 | ClearInterrupt(base); | |
813 | else | |
814 | outw(0x0000, base+0x04); /* enable interrupts */ | |
815 | return IRQ_HANDLED; | |
816 | } | |
817 | ||
818 | tty = port->tty; | |
819 | if (tty == NULL) { | |
820 | word_count = byte_count >> 1; | |
821 | while(byte_count > 1) { | |
822 | inw(base); | |
823 | byte_count -= 2; | |
824 | } | |
825 | if (byte_count & 0x01) | |
826 | inw(base); | |
827 | if (card->isa == YES) | |
828 | ClearInterrupt(base); | |
829 | else | |
830 | outw(0x0000, base+0x04); /* enable interrupts */ | |
831 | spin_unlock(&card->card_lock); | |
832 | return IRQ_HANDLED; | |
833 | } | |
834 | ||
835 | if (header & 0x8000) { /* Status Packet */ | |
836 | header = inw(base); | |
837 | switch(header & 0xff) { | |
838 | case 0: /* Change in EIA signals */ | |
839 | ||
840 | if (port->flags & ASYNC_CHECK_CD) { | |
841 | if (port->status & ISI_DCD) { | |
842 | if (!(header & ISI_DCD)) { | |
843 | /* Carrier has been lost */ | |
844 | #ifdef ISICOM_DEBUG | |
845 | printk(KERN_DEBUG "ISICOM: interrupt: DCD->low.\n"); | |
846 | #endif | |
847 | port->status &= ~ISI_DCD; | |
848 | schedule_work(&port->hangup_tq); | |
849 | } | |
850 | } | |
851 | else { | |
852 | if (header & ISI_DCD) { | |
853 | /* Carrier has been detected */ | |
854 | #ifdef ISICOM_DEBUG | |
855 | printk(KERN_DEBUG "ISICOM: interrupt: DCD->high.\n"); | |
856 | #endif | |
857 | port->status |= ISI_DCD; | |
858 | wake_up_interruptible(&port->open_wait); | |
859 | } | |
860 | } | |
861 | } | |
862 | else { | |
863 | if (header & ISI_DCD) | |
864 | port->status |= ISI_DCD; | |
865 | else | |
866 | port->status &= ~ISI_DCD; | |
867 | } | |
868 | ||
869 | if (port->flags & ASYNC_CTS_FLOW) { | |
870 | if (port->tty->hw_stopped) { | |
871 | if (header & ISI_CTS) { | |
872 | port->tty->hw_stopped = 0; | |
873 | /* start tx ing */ | |
874 | port->status |= (ISI_TXOK | ISI_CTS); | |
875 | schedule_work(&port->bh_tqueue); | |
876 | } | |
877 | } | |
878 | else { | |
879 | if (!(header & ISI_CTS)) { | |
880 | port->tty->hw_stopped = 1; | |
881 | /* stop tx ing */ | |
882 | port->status &= ~(ISI_TXOK | ISI_CTS); | |
883 | } | |
884 | } | |
885 | } | |
886 | else { | |
887 | if (header & ISI_CTS) | |
888 | port->status |= ISI_CTS; | |
889 | else | |
890 | port->status &= ~ISI_CTS; | |
891 | } | |
892 | ||
893 | if (header & ISI_DSR) | |
894 | port->status |= ISI_DSR; | |
895 | else | |
896 | port->status &= ~ISI_DSR; | |
897 | ||
898 | if (header & ISI_RI) | |
899 | port->status |= ISI_RI; | |
900 | else | |
901 | port->status &= ~ISI_RI; | |
902 | ||
903 | break; | |
904 | ||
905 | case 1: /* Received Break !!! */ | |
906 | if (tty->flip.count >= TTY_FLIPBUF_SIZE) | |
907 | break; | |
908 | *tty->flip.flag_buf_ptr++ = TTY_BREAK; | |
909 | *tty->flip.char_buf_ptr++ = 0; | |
910 | tty->flip.count++; | |
911 | if (port->flags & ASYNC_SAK) | |
912 | do_SAK(tty); | |
913 | schedule_delayed_work(&tty->flip.work, 1); | |
914 | break; | |
915 | ||
916 | case 2: /* Statistics */ | |
917 | printk(KERN_DEBUG "ISICOM: isicom_interrupt: stats!!!.\n"); | |
918 | break; | |
919 | ||
920 | default: | |
921 | printk(KERN_WARNING "ISICOM: Intr: Unknown code in status packet.\n"); | |
922 | break; | |
923 | } | |
924 | } | |
925 | else { /* Data Packet */ | |
926 | count = min_t(unsigned short, byte_count, (TTY_FLIPBUF_SIZE - tty->flip.count)); | |
927 | #ifdef ISICOM_DEBUG | |
928 | printk(KERN_DEBUG "ISICOM: Intr: Can rx %d of %d bytes.\n", | |
929 | count, byte_count); | |
930 | #endif | |
931 | word_count = count >> 1; | |
932 | insw(base, tty->flip.char_buf_ptr, word_count); | |
933 | tty->flip.char_buf_ptr += (word_count << 1); | |
934 | byte_count -= (word_count << 1); | |
935 | if (count & 0x0001) { | |
936 | *tty->flip.char_buf_ptr++ = (char)(inw(base) & 0xff); | |
937 | byte_count -= 2; | |
938 | } | |
939 | memset(tty->flip.flag_buf_ptr, 0, count); | |
940 | tty->flip.flag_buf_ptr += count; | |
941 | tty->flip.count += count; | |
942 | ||
943 | if (byte_count > 0) { | |
944 | printk(KERN_DEBUG "ISICOM: Intr(0x%x:%d): Flip buffer overflow! dropping bytes...\n", | |
945 | base, channel+1); | |
946 | while(byte_count > 0) { /* drain out unread xtra data */ | |
947 | inw(base); | |
948 | byte_count -= 2; | |
949 | } | |
950 | } | |
951 | schedule_delayed_work(&tty->flip.work, 1); | |
952 | } | |
953 | if (card->isa == YES) | |
954 | ClearInterrupt(base); | |
955 | else | |
956 | outw(0x0000, base+0x04); /* enable interrupts */ | |
957 | return IRQ_HANDLED; | |
958 | } | |
959 | ||
960 | static void isicom_config_port(struct isi_port * port) | |
961 | { | |
962 | struct isi_board * card = port->card; | |
963 | struct tty_struct * tty; | |
964 | unsigned long baud; | |
965 | unsigned short channel_setup, base = card->base; | |
966 | unsigned short channel = port->channel, shift_count = card->shift_count; | |
967 | unsigned char flow_ctrl; | |
968 | ||
969 | if (!(tty = port->tty) || !tty->termios) | |
970 | return; | |
971 | baud = C_BAUD(tty); | |
972 | if (baud & CBAUDEX) { | |
973 | baud &= ~CBAUDEX; | |
974 | ||
975 | /* if CBAUDEX bit is on and the baud is set to either 50 or 75 | |
976 | * then the card is programmed for 57.6Kbps or 115Kbps | |
977 | * respectively. | |
978 | */ | |
979 | ||
980 | if (baud < 1 || baud > 2) | |
981 | port->tty->termios->c_cflag &= ~CBAUDEX; | |
982 | else | |
983 | baud += 15; | |
984 | } | |
985 | if (baud == 15) { | |
986 | ||
987 | /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set | |
988 | * by the set_serial_info ioctl ... this is done by | |
989 | * the 'setserial' utility. | |
990 | */ | |
991 | ||
992 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) | |
993 | baud++; /* 57.6 Kbps */ | |
994 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) | |
995 | baud +=2; /* 115 Kbps */ | |
996 | } | |
997 | if (linuxb_to_isib[baud] == -1) { | |
998 | /* hang up */ | |
999 | drop_dtr(port); | |
1000 | return; | |
1001 | } | |
1002 | else | |
1003 | raise_dtr(port); | |
1004 | ||
1005 | if (lock_card(card)) { | |
1006 | outw(0x8000 | (channel << shift_count) |0x03, base); | |
1007 | outw(linuxb_to_isib[baud] << 8 | 0x03, base); | |
1008 | channel_setup = 0; | |
1009 | switch(C_CSIZE(tty)) { | |
1010 | case CS5: | |
1011 | channel_setup |= ISICOM_CS5; | |
1012 | break; | |
1013 | case CS6: | |
1014 | channel_setup |= ISICOM_CS6; | |
1015 | break; | |
1016 | case CS7: | |
1017 | channel_setup |= ISICOM_CS7; | |
1018 | break; | |
1019 | case CS8: | |
1020 | channel_setup |= ISICOM_CS8; | |
1021 | break; | |
1022 | } | |
1023 | ||
1024 | if (C_CSTOPB(tty)) | |
1025 | channel_setup |= ISICOM_2SB; | |
1026 | if (C_PARENB(tty)) { | |
1027 | channel_setup |= ISICOM_EVPAR; | |
1028 | if (C_PARODD(tty)) | |
1029 | channel_setup |= ISICOM_ODPAR; | |
1030 | } | |
1031 | outw(channel_setup, base); | |
1032 | InterruptTheCard(base); | |
1033 | unlock_card(card); | |
1034 | } | |
1035 | if (C_CLOCAL(tty)) | |
1036 | port->flags &= ~ASYNC_CHECK_CD; | |
1037 | else | |
1038 | port->flags |= ASYNC_CHECK_CD; | |
1039 | ||
1040 | /* flow control settings ...*/ | |
1041 | flow_ctrl = 0; | |
1042 | port->flags &= ~ASYNC_CTS_FLOW; | |
1043 | if (C_CRTSCTS(tty)) { | |
1044 | port->flags |= ASYNC_CTS_FLOW; | |
1045 | flow_ctrl |= ISICOM_CTSRTS; | |
1046 | } | |
1047 | if (I_IXON(tty)) | |
1048 | flow_ctrl |= ISICOM_RESPOND_XONXOFF; | |
1049 | if (I_IXOFF(tty)) | |
1050 | flow_ctrl |= ISICOM_INITIATE_XONXOFF; | |
1051 | ||
1052 | if (lock_card(card)) { | |
1053 | outw(0x8000 | (channel << shift_count) |0x04, base); | |
1054 | outw(flow_ctrl << 8 | 0x05, base); | |
1055 | outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base); | |
1056 | InterruptTheCard(base); | |
1057 | unlock_card(card); | |
1058 | } | |
1059 | ||
1060 | /* rx enabled -> enable port for rx on the card */ | |
1061 | if (C_CREAD(tty)) { | |
1062 | card->port_status |= (1 << channel); | |
1063 | outw(card->port_status, base + 0x02); | |
1064 | } | |
1065 | } | |
1066 | ||
1067 | /* open et all */ | |
1068 | ||
1069 | static inline void isicom_setup_board(struct isi_board * bp) | |
1070 | { | |
1071 | int channel; | |
1072 | struct isi_port * port; | |
1073 | unsigned long flags; | |
1074 | ||
1075 | spin_lock_irqsave(&bp->card_lock, flags); | |
1076 | if (bp->status & BOARD_ACTIVE) { | |
1077 | spin_unlock_irqrestore(&bp->card_lock, flags); | |
1078 | return; | |
1079 | } | |
1080 | port = bp->ports; | |
1081 | bp->status |= BOARD_ACTIVE; | |
1082 | spin_unlock_irqrestore(&bp->card_lock, flags); | |
1083 | for(channel = 0; channel < bp->port_count; channel++, port++) | |
1084 | drop_dtr_rts(port); | |
1085 | return; | |
1086 | } | |
1087 | ||
1088 | static int isicom_setup_port(struct isi_port * port) | |
1089 | { | |
1090 | struct isi_board * card = port->card; | |
1091 | unsigned long flags; | |
1092 | ||
1093 | if (port->flags & ASYNC_INITIALIZED) { | |
1094 | return 0; | |
1095 | } | |
1096 | if (!port->xmit_buf) { | |
1097 | unsigned long page; | |
1098 | ||
1099 | if (!(page = get_zeroed_page(GFP_KERNEL))) | |
1100 | return -ENOMEM; | |
1101 | ||
1102 | if (port->xmit_buf) { | |
1103 | free_page(page); | |
1104 | return -ERESTARTSYS; | |
1105 | } | |
1106 | port->xmit_buf = (unsigned char *) page; | |
1107 | } | |
1108 | ||
1109 | spin_lock_irqsave(&card->card_lock, flags); | |
1110 | if (port->tty) | |
1111 | clear_bit(TTY_IO_ERROR, &port->tty->flags); | |
1112 | if (port->count == 1) | |
1113 | card->count++; | |
1114 | ||
1115 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1116 | ||
1117 | /* discard any residual data */ | |
1118 | kill_queue(port, ISICOM_KILLTX | ISICOM_KILLRX); | |
1119 | ||
1120 | isicom_config_port(port); | |
1121 | port->flags |= ASYNC_INITIALIZED; | |
1122 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1123 | ||
1124 | return 0; | |
1125 | } | |
1126 | ||
1127 | static int block_til_ready(struct tty_struct * tty, struct file * filp, struct isi_port * port) | |
1128 | { | |
1129 | struct isi_board * card = port->card; | |
1130 | int do_clocal = 0, retval; | |
1131 | unsigned long flags; | |
1132 | DECLARE_WAITQUEUE(wait, current); | |
1133 | ||
1134 | /* block if port is in the process of being closed */ | |
1135 | ||
1136 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { | |
1137 | #ifdef ISICOM_DEBUG | |
1138 | printk(KERN_DEBUG "ISICOM: block_til_ready: close in progress.\n"); | |
1139 | #endif | |
1140 | interruptible_sleep_on(&port->close_wait); | |
1141 | if (port->flags & ASYNC_HUP_NOTIFY) | |
1142 | return -EAGAIN; | |
1143 | else | |
1144 | return -ERESTARTSYS; | |
1145 | } | |
1146 | ||
1147 | /* if non-blocking mode is set ... */ | |
1148 | ||
1149 | if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) { | |
1150 | #ifdef ISICOM_DEBUG | |
1151 | printk(KERN_DEBUG "ISICOM: block_til_ready: non-block mode.\n"); | |
1152 | #endif | |
1153 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
1154 | return 0; | |
1155 | } | |
1156 | ||
1157 | if (C_CLOCAL(tty)) | |
1158 | do_clocal = 1; | |
1159 | ||
1160 | /* block waiting for DCD to be asserted, and while | |
1161 | callout dev is busy */ | |
1162 | retval = 0; | |
1163 | add_wait_queue(&port->open_wait, &wait); | |
1164 | ||
1165 | spin_lock_irqsave(&card->card_lock, flags); | |
1166 | if (!tty_hung_up_p(filp)) | |
1167 | port->count--; | |
1168 | port->blocked_open++; | |
1169 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1170 | ||
1171 | while (1) { | |
1172 | raise_dtr_rts(port); | |
1173 | ||
1174 | set_current_state(TASK_INTERRUPTIBLE); | |
1175 | if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) { | |
1176 | if (port->flags & ASYNC_HUP_NOTIFY) | |
1177 | retval = -EAGAIN; | |
1178 | else | |
1179 | retval = -ERESTARTSYS; | |
1180 | break; | |
1181 | } | |
1182 | if (!(port->flags & ASYNC_CLOSING) && | |
1183 | (do_clocal || (port->status & ISI_DCD))) { | |
1184 | break; | |
1185 | } | |
1186 | if (signal_pending(current)) { | |
1187 | retval = -ERESTARTSYS; | |
1188 | break; | |
1189 | } | |
1190 | schedule(); | |
1191 | } | |
1192 | set_current_state(TASK_RUNNING); | |
1193 | remove_wait_queue(&port->open_wait, &wait); | |
1194 | spin_lock_irqsave(&card->card_lock, flags); | |
1195 | if (!tty_hung_up_p(filp)) | |
1196 | port->count++; | |
1197 | port->blocked_open--; | |
1198 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1199 | if (retval) | |
1200 | return retval; | |
1201 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
1202 | return 0; | |
1203 | } | |
1204 | ||
1205 | static int isicom_open(struct tty_struct * tty, struct file * filp) | |
1206 | { | |
1207 | struct isi_port * port; | |
1208 | struct isi_board * card; | |
1209 | unsigned int line, board; | |
1210 | int error; | |
1211 | ||
1212 | line = tty->index; | |
1213 | if (line < 0 || line > PORT_COUNT-1) | |
1214 | return -ENODEV; | |
1215 | board = BOARD(line); | |
1216 | card = &isi_card[board]; | |
1217 | ||
1218 | if (!(card->status & FIRMWARE_LOADED)) | |
1219 | return -ENODEV; | |
1220 | ||
1221 | /* open on a port greater than the port count for the card !!! */ | |
1222 | if (line > ((board * 16) + card->port_count - 1)) | |
1223 | return -ENODEV; | |
1224 | ||
1225 | port = &isi_ports[line]; | |
1226 | if (isicom_paranoia_check(port, tty->name, "isicom_open")) | |
1227 | return -ENODEV; | |
1228 | ||
1229 | isicom_setup_board(card); | |
1230 | ||
1231 | port->count++; | |
1232 | tty->driver_data = port; | |
1233 | port->tty = tty; | |
1234 | if ((error = isicom_setup_port(port))!=0) | |
1235 | return error; | |
1236 | if ((error = block_til_ready(tty, filp, port))!=0) | |
1237 | return error; | |
1238 | ||
1239 | return 0; | |
1240 | } | |
1241 | ||
1242 | /* close et all */ | |
1243 | ||
1244 | static inline void isicom_shutdown_board(struct isi_board * bp) | |
1245 | { | |
1246 | unsigned long flags; | |
1247 | ||
1248 | spin_lock_irqsave(&bp->card_lock, flags); | |
1249 | if (bp->status & BOARD_ACTIVE) { | |
1250 | bp->status &= ~BOARD_ACTIVE; | |
1251 | } | |
1252 | spin_unlock_irqrestore(&bp->card_lock, flags); | |
1253 | } | |
1254 | ||
1255 | static void isicom_shutdown_port(struct isi_port * port) | |
1256 | { | |
1257 | struct isi_board * card = port->card; | |
1258 | struct tty_struct * tty; | |
1259 | unsigned long flags; | |
1260 | ||
1261 | tty = port->tty; | |
1262 | ||
1263 | spin_lock_irqsave(&card->card_lock, flags); | |
1264 | if (!(port->flags & ASYNC_INITIALIZED)) { | |
1265 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1266 | return; | |
1267 | } | |
1268 | if (port->xmit_buf) { | |
1269 | free_page((unsigned long) port->xmit_buf); | |
1270 | port->xmit_buf = NULL; | |
1271 | } | |
1272 | port->flags &= ~ASYNC_INITIALIZED; | |
1273 | /* 3rd October 2000 : Vinayak P Risbud */ | |
1274 | port->tty = NULL; | |
1275 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1276 | ||
1277 | /*Fix done by Anil .S on 30-04-2001 | |
1278 | remote login through isi port has dtr toggle problem | |
1279 | due to which the carrier drops before the password prompt | |
1280 | appears on the remote end. Now we drop the dtr only if the | |
1281 | HUPCL(Hangup on close) flag is set for the tty*/ | |
1282 | ||
1283 | if (C_HUPCL(tty)) | |
1284 | /* drop dtr on this port */ | |
1285 | drop_dtr(port); | |
1286 | ||
1287 | /* any other port uninits */ | |
1288 | if (tty) | |
1289 | set_bit(TTY_IO_ERROR, &tty->flags); | |
1290 | ||
1291 | if (--card->count < 0) { | |
1292 | printk(KERN_DEBUG "ISICOM: isicom_shutdown_port: bad board(0x%x) count %d.\n", | |
1293 | card->base, card->count); | |
1294 | card->count = 0; | |
1295 | } | |
1296 | ||
1297 | /* last port was closed , shutdown that boad too */ | |
1298 | if(C_HUPCL(tty)) { | |
1299 | if (!card->count) | |
1300 | isicom_shutdown_board(card); | |
1301 | } | |
1302 | } | |
1303 | ||
1304 | static void isicom_close(struct tty_struct * tty, struct file * filp) | |
1305 | { | |
1306 | struct isi_port * port = (struct isi_port *) tty->driver_data; | |
1307 | struct isi_board * card = port->card; | |
1308 | unsigned long flags; | |
1309 | ||
1310 | if (!port) | |
1311 | return; | |
1312 | if (isicom_paranoia_check(port, tty->name, "isicom_close")) | |
1313 | return; | |
1314 | ||
1315 | #ifdef ISICOM_DEBUG | |
1316 | printk(KERN_DEBUG "ISICOM: Close start!!!.\n"); | |
1317 | #endif | |
1318 | ||
1319 | spin_lock_irqsave(&card->card_lock, flags); | |
1320 | if (tty_hung_up_p(filp)) { | |
1321 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1322 | return; | |
1323 | } | |
1324 | ||
1325 | if (tty->count == 1 && port->count != 1) { | |
1326 | printk(KERN_WARNING "ISICOM:(0x%x) isicom_close: bad port count" | |
1327 | "tty->count = 1 port count = %d.\n", | |
1328 | card->base, port->count); | |
1329 | port->count = 1; | |
1330 | } | |
1331 | if (--port->count < 0) { | |
1332 | printk(KERN_WARNING "ISICOM:(0x%x) isicom_close: bad port count for" | |
1333 | "channel%d = %d", card->base, port->channel, | |
1334 | port->count); | |
1335 | port->count = 0; | |
1336 | } | |
1337 | ||
1338 | if (port->count) { | |
1339 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1340 | return; | |
1341 | } | |
1342 | port->flags |= ASYNC_CLOSING; | |
1343 | tty->closing = 1; | |
1344 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1345 | ||
1346 | if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) | |
1347 | tty_wait_until_sent(tty, port->closing_wait); | |
1348 | /* indicate to the card that no more data can be received | |
1349 | on this port */ | |
1350 | spin_lock_irqsave(&card->card_lock, flags); | |
1351 | if (port->flags & ASYNC_INITIALIZED) { | |
1352 | card->port_status &= ~(1 << port->channel); | |
1353 | outw(card->port_status, card->base + 0x02); | |
1354 | } | |
1355 | isicom_shutdown_port(port); | |
1356 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1357 | ||
1358 | if (tty->driver->flush_buffer) | |
1359 | tty->driver->flush_buffer(tty); | |
1360 | tty_ldisc_flush(tty); | |
1361 | ||
1362 | spin_lock_irqsave(&card->card_lock, flags); | |
1363 | tty->closing = 0; | |
1364 | ||
1365 | if (port->blocked_open) { | |
1366 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1367 | if (port->close_delay) { | |
1368 | #ifdef ISICOM_DEBUG | |
1369 | printk(KERN_DEBUG "ISICOM: scheduling until time out.\n"); | |
1370 | #endif | |
1371 | msleep_interruptible(jiffies_to_msecs(port->close_delay)); | |
1372 | } | |
1373 | spin_lock_irqsave(&card->card_lock, flags); | |
1374 | wake_up_interruptible(&port->open_wait); | |
1375 | } | |
1376 | port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); | |
1377 | wake_up_interruptible(&port->close_wait); | |
1378 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1379 | } | |
1380 | ||
1381 | /* write et all */ | |
1382 | static int isicom_write(struct tty_struct * tty, | |
1383 | const unsigned char * buf, int count) | |
1384 | { | |
1385 | struct isi_port * port = (struct isi_port *) tty->driver_data; | |
1386 | struct isi_board * card = port->card; | |
1387 | unsigned long flags; | |
1388 | int cnt, total = 0; | |
1389 | ||
1390 | if (isicom_paranoia_check(port, tty->name, "isicom_write")) | |
1391 | return 0; | |
1392 | ||
1393 | if (!tty || !port->xmit_buf || !tmp_buf) | |
1394 | return 0; | |
1395 | ||
1396 | spin_lock_irqsave(&card->card_lock, flags); | |
1397 | ||
1398 | while(1) { | |
1399 | cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, | |
1400 | SERIAL_XMIT_SIZE - port->xmit_head)); | |
1401 | if (cnt <= 0) | |
1402 | break; | |
1403 | ||
1404 | memcpy(port->xmit_buf + port->xmit_head, buf, cnt); | |
1405 | port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE - 1); | |
1406 | port->xmit_cnt += cnt; | |
1407 | buf += cnt; | |
1408 | count -= cnt; | |
1409 | total += cnt; | |
1410 | } | |
1411 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped) | |
1412 | port->status |= ISI_TXOK; | |
1413 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1414 | return total; | |
1415 | } | |
1416 | ||
1417 | /* put_char et all */ | |
1418 | static void isicom_put_char(struct tty_struct * tty, unsigned char ch) | |
1419 | { | |
1420 | struct isi_port * port = (struct isi_port *) tty->driver_data; | |
1421 | struct isi_board * card = port->card; | |
1422 | unsigned long flags; | |
1423 | ||
1424 | if (isicom_paranoia_check(port, tty->name, "isicom_put_char")) | |
1425 | return; | |
1426 | ||
1427 | if (!tty || !port->xmit_buf) | |
1428 | return; | |
1429 | ||
1430 | spin_lock_irqsave(&card->card_lock, flags); | |
1431 | if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) { | |
1432 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1433 | return; | |
1434 | } | |
1435 | ||
1436 | port->xmit_buf[port->xmit_head++] = ch; | |
1437 | port->xmit_head &= (SERIAL_XMIT_SIZE - 1); | |
1438 | port->xmit_cnt++; | |
1439 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1440 | } | |
1441 | ||
1442 | /* flush_chars et all */ | |
1443 | static void isicom_flush_chars(struct tty_struct * tty) | |
1444 | { | |
1445 | struct isi_port * port = (struct isi_port *) tty->driver_data; | |
1446 | ||
1447 | if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars")) | |
1448 | return; | |
1449 | ||
1450 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || !port->xmit_buf) | |
1451 | return; | |
1452 | ||
1453 | /* this tells the transmitter to consider this port for | |
1454 | data output to the card ... that's the best we can do. */ | |
1455 | port->status |= ISI_TXOK; | |
1456 | } | |
1457 | ||
1458 | /* write_room et all */ | |
1459 | static int isicom_write_room(struct tty_struct * tty) | |
1460 | { | |
1461 | struct isi_port * port = (struct isi_port *) tty->driver_data; | |
1462 | int free; | |
1463 | ||
1464 | if (isicom_paranoia_check(port, tty->name, "isicom_write_room")) | |
1465 | return 0; | |
1466 | ||
1467 | free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; | |
1468 | if (free < 0) | |
1469 | free = 0; | |
1470 | return free; | |
1471 | } | |
1472 | ||
1473 | /* chars_in_buffer et all */ | |
1474 | static int isicom_chars_in_buffer(struct tty_struct * tty) | |
1475 | { | |
1476 | struct isi_port * port = (struct isi_port *) tty->driver_data; | |
1477 | if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer")) | |
1478 | return 0; | |
1479 | return port->xmit_cnt; | |
1480 | } | |
1481 | ||
1482 | /* ioctl et all */ | |
1483 | static inline void isicom_send_break(struct isi_port * port, unsigned long length) | |
1484 | { | |
1485 | struct isi_board * card = port->card; | |
1486 | unsigned short base = card->base; | |
1487 | ||
1488 | if(!lock_card(card)) | |
1489 | return; | |
1490 | ||
1491 | outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base); | |
1492 | outw((length & 0xff) << 8 | 0x00, base); | |
1493 | outw((length & 0xff00), base); | |
1494 | InterruptTheCard(base); | |
1495 | ||
1496 | unlock_card(card); | |
1497 | } | |
1498 | ||
1499 | static int isicom_tiocmget(struct tty_struct *tty, struct file *file) | |
1500 | { | |
1501 | struct isi_port * port = (struct isi_port *) tty->driver_data; | |
1502 | /* just send the port status */ | |
1503 | unsigned short status = port->status; | |
1504 | ||
1505 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) | |
1506 | return -ENODEV; | |
1507 | ||
1508 | return ((status & ISI_RTS) ? TIOCM_RTS : 0) | | |
1509 | ((status & ISI_DTR) ? TIOCM_DTR : 0) | | |
1510 | ((status & ISI_DCD) ? TIOCM_CAR : 0) | | |
1511 | ((status & ISI_DSR) ? TIOCM_DSR : 0) | | |
1512 | ((status & ISI_CTS) ? TIOCM_CTS : 0) | | |
1513 | ((status & ISI_RI ) ? TIOCM_RI : 0); | |
1514 | } | |
1515 | ||
1516 | static int isicom_tiocmset(struct tty_struct *tty, struct file *file, | |
1517 | unsigned int set, unsigned int clear) | |
1518 | { | |
1519 | struct isi_port * port = (struct isi_port *) tty->driver_data; | |
1520 | ||
1521 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) | |
1522 | return -ENODEV; | |
1523 | ||
1524 | if (set & TIOCM_RTS) | |
1525 | raise_rts(port); | |
1526 | if (set & TIOCM_DTR) | |
1527 | raise_dtr(port); | |
1528 | ||
1529 | if (clear & TIOCM_RTS) | |
1530 | drop_rts(port); | |
1531 | if (clear & TIOCM_DTR) | |
1532 | drop_dtr(port); | |
1533 | ||
1534 | return 0; | |
1535 | } | |
1536 | ||
1537 | static int isicom_set_serial_info(struct isi_port * port, | |
1538 | struct serial_struct __user *info) | |
1539 | { | |
1540 | struct serial_struct newinfo; | |
1541 | int reconfig_port; | |
1542 | ||
1543 | if(copy_from_user(&newinfo, info, sizeof(newinfo))) | |
1544 | return -EFAULT; | |
1545 | ||
1546 | reconfig_port = ((port->flags & ASYNC_SPD_MASK) != | |
1547 | (newinfo.flags & ASYNC_SPD_MASK)); | |
1548 | ||
1549 | if (!capable(CAP_SYS_ADMIN)) { | |
1550 | if ((newinfo.close_delay != port->close_delay) || | |
1551 | (newinfo.closing_wait != port->closing_wait) || | |
1552 | ((newinfo.flags & ~ASYNC_USR_MASK) != | |
1553 | (port->flags & ~ASYNC_USR_MASK))) | |
1554 | return -EPERM; | |
1555 | port->flags = ((port->flags & ~ ASYNC_USR_MASK) | | |
1556 | (newinfo.flags & ASYNC_USR_MASK)); | |
1557 | } | |
1558 | else { | |
1559 | port->close_delay = newinfo.close_delay; | |
1560 | port->closing_wait = newinfo.closing_wait; | |
1561 | port->flags = ((port->flags & ~ASYNC_FLAGS) | | |
1562 | (newinfo.flags & ASYNC_FLAGS)); | |
1563 | } | |
1564 | if (reconfig_port) { | |
1565 | isicom_config_port(port); | |
1566 | } | |
1567 | return 0; | |
1568 | } | |
1569 | ||
1570 | static int isicom_get_serial_info(struct isi_port * port, | |
1571 | struct serial_struct __user *info) | |
1572 | { | |
1573 | struct serial_struct out_info; | |
1574 | ||
1575 | memset(&out_info, 0, sizeof(out_info)); | |
1576 | /* out_info.type = ? */ | |
1577 | out_info.line = port - isi_ports; | |
1578 | out_info.port = port->card->base; | |
1579 | out_info.irq = port->card->irq; | |
1580 | out_info.flags = port->flags; | |
1581 | /* out_info.baud_base = ? */ | |
1582 | out_info.close_delay = port->close_delay; | |
1583 | out_info.closing_wait = port->closing_wait; | |
1584 | if(copy_to_user(info, &out_info, sizeof(out_info))) | |
1585 | return -EFAULT; | |
1586 | return 0; | |
1587 | } | |
1588 | ||
1589 | static int isicom_ioctl(struct tty_struct * tty, struct file * filp, | |
1590 | unsigned int cmd, unsigned long arg) | |
1591 | { | |
1592 | struct isi_port * port = (struct isi_port *) tty->driver_data; | |
1593 | void __user *argp = (void __user *)arg; | |
1594 | int retval; | |
1595 | ||
1596 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) | |
1597 | return -ENODEV; | |
1598 | ||
1599 | switch(cmd) { | |
1600 | case TCSBRK: | |
1601 | retval = tty_check_change(tty); | |
1602 | if (retval) | |
1603 | return retval; | |
1604 | tty_wait_until_sent(tty, 0); | |
1605 | if (!arg) | |
1606 | isicom_send_break(port, HZ/4); | |
1607 | return 0; | |
1608 | ||
1609 | case TCSBRKP: | |
1610 | retval = tty_check_change(tty); | |
1611 | if (retval) | |
1612 | return retval; | |
1613 | tty_wait_until_sent(tty, 0); | |
1614 | isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4); | |
1615 | return 0; | |
1616 | ||
1617 | case TIOCGSOFTCAR: | |
1618 | return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp); | |
1619 | ||
1620 | case TIOCSSOFTCAR: | |
1621 | if(get_user(arg, (unsigned long __user *) argp)) | |
1622 | return -EFAULT; | |
1623 | tty->termios->c_cflag = | |
1624 | ((tty->termios->c_cflag & ~CLOCAL) | | |
1625 | (arg ? CLOCAL : 0)); | |
1626 | return 0; | |
1627 | ||
1628 | case TIOCGSERIAL: | |
1629 | return isicom_get_serial_info(port, argp); | |
1630 | ||
1631 | case TIOCSSERIAL: | |
1632 | return isicom_set_serial_info(port, argp); | |
1633 | ||
1634 | default: | |
1635 | return -ENOIOCTLCMD; | |
1636 | } | |
1637 | return 0; | |
1638 | } | |
1639 | ||
1640 | /* set_termios et all */ | |
1641 | static void isicom_set_termios(struct tty_struct * tty, struct termios * old_termios) | |
1642 | { | |
1643 | struct isi_port * port = (struct isi_port *) tty->driver_data; | |
1644 | ||
1645 | if (isicom_paranoia_check(port, tty->name, "isicom_set_termios")) | |
1646 | return; | |
1647 | ||
1648 | if (tty->termios->c_cflag == old_termios->c_cflag && | |
1649 | tty->termios->c_iflag == old_termios->c_iflag) | |
1650 | return; | |
1651 | ||
1652 | isicom_config_port(port); | |
1653 | ||
1654 | if ((old_termios->c_cflag & CRTSCTS) && | |
1655 | !(tty->termios->c_cflag & CRTSCTS)) { | |
1656 | tty->hw_stopped = 0; | |
1657 | isicom_start(tty); | |
1658 | } | |
1659 | } | |
1660 | ||
1661 | /* throttle et all */ | |
1662 | static void isicom_throttle(struct tty_struct * tty) | |
1663 | { | |
1664 | struct isi_port * port = (struct isi_port *) tty->driver_data; | |
1665 | struct isi_board * card = port->card; | |
1666 | ||
1667 | if (isicom_paranoia_check(port, tty->name, "isicom_throttle")) | |
1668 | return; | |
1669 | ||
1670 | /* tell the card that this port cannot handle any more data for now */ | |
1671 | card->port_status &= ~(1 << port->channel); | |
1672 | outw(card->port_status, card->base + 0x02); | |
1673 | } | |
1674 | ||
1675 | /* unthrottle et all */ | |
1676 | static void isicom_unthrottle(struct tty_struct * tty) | |
1677 | { | |
1678 | struct isi_port * port = (struct isi_port *) tty->driver_data; | |
1679 | struct isi_board * card = port->card; | |
1680 | ||
1681 | if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle")) | |
1682 | return; | |
1683 | ||
1684 | /* tell the card that this port is ready to accept more data */ | |
1685 | card->port_status |= (1 << port->channel); | |
1686 | outw(card->port_status, card->base + 0x02); | |
1687 | } | |
1688 | ||
1689 | /* stop et all */ | |
1690 | static void isicom_stop(struct tty_struct * tty) | |
1691 | { | |
1692 | struct isi_port * port = (struct isi_port *) tty->driver_data; | |
1693 | ||
1694 | if (isicom_paranoia_check(port, tty->name, "isicom_stop")) | |
1695 | return; | |
1696 | ||
1697 | /* this tells the transmitter not to consider this port for | |
1698 | data output to the card. */ | |
1699 | port->status &= ~ISI_TXOK; | |
1700 | } | |
1701 | ||
1702 | /* start et all */ | |
1703 | static void isicom_start(struct tty_struct * tty) | |
1704 | { | |
1705 | struct isi_port * port = (struct isi_port *) tty->driver_data; | |
1706 | ||
1707 | if (isicom_paranoia_check(port, tty->name, "isicom_start")) | |
1708 | return; | |
1709 | ||
1710 | /* this tells the transmitter to consider this port for | |
1711 | data output to the card. */ | |
1712 | port->status |= ISI_TXOK; | |
1713 | } | |
1714 | ||
1715 | /* hangup et all */ | |
1716 | static void do_isicom_hangup(void * data) | |
1717 | { | |
1718 | struct isi_port * port = (struct isi_port *) data; | |
1719 | struct tty_struct * tty; | |
1720 | ||
1721 | tty = port->tty; | |
1722 | if (tty) | |
1723 | tty_hangup(tty); | |
1724 | } | |
1725 | ||
1726 | static void isicom_hangup(struct tty_struct * tty) | |
1727 | { | |
1728 | struct isi_port * port = (struct isi_port *) tty->driver_data; | |
1729 | ||
1730 | if (isicom_paranoia_check(port, tty->name, "isicom_hangup")) | |
1731 | return; | |
1732 | ||
1733 | isicom_shutdown_port(port); | |
1734 | port->count = 0; | |
1735 | port->flags &= ~ASYNC_NORMAL_ACTIVE; | |
1736 | port->tty = NULL; | |
1737 | wake_up_interruptible(&port->open_wait); | |
1738 | } | |
1739 | ||
1740 | /* flush_buffer et all */ | |
1741 | static void isicom_flush_buffer(struct tty_struct * tty) | |
1742 | { | |
1743 | struct isi_port * port = (struct isi_port *) tty->driver_data; | |
1744 | struct isi_board * card = port->card; | |
1745 | unsigned long flags; | |
1746 | ||
1747 | if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer")) | |
1748 | return; | |
1749 | ||
1750 | spin_lock_irqsave(&card->card_lock, flags); | |
1751 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1752 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1753 | ||
1754 | wake_up_interruptible(&tty->write_wait); | |
1755 | tty_wakeup(tty); | |
1756 | } | |
1757 | ||
1758 | ||
1759 | static int __init register_ioregion(void) | |
1760 | { | |
1761 | int count, done=0; | |
1762 | for (count=0; count < BOARD_COUNT; count++ ) { | |
1763 | if (isi_card[count].base) | |
1764 | if (!request_region(isi_card[count].base,16,ISICOM_NAME)) { | |
1765 | printk(KERN_DEBUG "ISICOM: I/O Region 0x%x-0x%x is busy. Card%d will be disabled.\n", | |
1766 | isi_card[count].base,isi_card[count].base+15,count+1); | |
1767 | isi_card[count].base=0; | |
1768 | done++; | |
1769 | } | |
1770 | } | |
1771 | return done; | |
1772 | } | |
1773 | ||
1774 | static void __exit unregister_ioregion(void) | |
1775 | { | |
1776 | int count; | |
1777 | for (count=0; count < BOARD_COUNT; count++ ) | |
1778 | if (isi_card[count].base) { | |
1779 | release_region(isi_card[count].base,16); | |
1780 | #ifdef ISICOM_DEBUG | |
1781 | 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); | |
1782 | #endif | |
1783 | } | |
1784 | } | |
1785 | ||
1786 | static struct tty_operations isicom_ops = { | |
1787 | .open = isicom_open, | |
1788 | .close = isicom_close, | |
1789 | .write = isicom_write, | |
1790 | .put_char = isicom_put_char, | |
1791 | .flush_chars = isicom_flush_chars, | |
1792 | .write_room = isicom_write_room, | |
1793 | .chars_in_buffer = isicom_chars_in_buffer, | |
1794 | .ioctl = isicom_ioctl, | |
1795 | .set_termios = isicom_set_termios, | |
1796 | .throttle = isicom_throttle, | |
1797 | .unthrottle = isicom_unthrottle, | |
1798 | .stop = isicom_stop, | |
1799 | .start = isicom_start, | |
1800 | .hangup = isicom_hangup, | |
1801 | .flush_buffer = isicom_flush_buffer, | |
1802 | .tiocmget = isicom_tiocmget, | |
1803 | .tiocmset = isicom_tiocmset, | |
1804 | }; | |
1805 | ||
1806 | static int __init register_drivers(void) | |
1807 | { | |
1808 | int error; | |
1809 | ||
1810 | /* tty driver structure initialization */ | |
1811 | isicom_normal = alloc_tty_driver(PORT_COUNT); | |
1812 | if (!isicom_normal) | |
1813 | return -ENOMEM; | |
1814 | ||
1815 | isicom_normal->owner = THIS_MODULE; | |
1816 | isicom_normal->name = "ttyM"; | |
1817 | isicom_normal->devfs_name = "isicom/"; | |
1818 | isicom_normal->major = ISICOM_NMAJOR; | |
1819 | isicom_normal->minor_start = 0; | |
1820 | isicom_normal->type = TTY_DRIVER_TYPE_SERIAL; | |
1821 | isicom_normal->subtype = SERIAL_TYPE_NORMAL; | |
1822 | isicom_normal->init_termios = tty_std_termios; | |
1823 | isicom_normal->init_termios.c_cflag = | |
1824 | B9600 | CS8 | CREAD | HUPCL |CLOCAL; | |
1825 | isicom_normal->flags = TTY_DRIVER_REAL_RAW; | |
1826 | tty_set_operations(isicom_normal, &isicom_ops); | |
1827 | ||
1828 | if ((error=tty_register_driver(isicom_normal))!=0) { | |
1829 | printk(KERN_DEBUG "ISICOM: Couldn't register the dialin driver, error=%d\n", | |
1830 | error); | |
1831 | put_tty_driver(isicom_normal); | |
1832 | return error; | |
1833 | } | |
1834 | return 0; | |
1835 | } | |
1836 | ||
1837 | static void __exit unregister_drivers(void) | |
1838 | { | |
1839 | int error = tty_unregister_driver(isicom_normal); | |
1840 | if (error) | |
1841 | printk(KERN_DEBUG "ISICOM: couldn't unregister normal driver error=%d.\n",error); | |
1842 | put_tty_driver(isicom_normal); | |
1843 | } | |
1844 | ||
1845 | static int __init register_isr(void) | |
1846 | { | |
1847 | int count, done=0; | |
1848 | unsigned long irqflags; | |
1849 | ||
1850 | for (count=0; count < BOARD_COUNT; count++ ) { | |
1851 | if (isi_card[count].base) { | |
1852 | irqflags = (isi_card[count].isa == YES) ? | |
1853 | SA_INTERRUPT : | |
1854 | (SA_INTERRUPT | SA_SHIRQ); | |
1855 | ||
1856 | if (request_irq(isi_card[count].irq, | |
1857 | isicom_interrupt, | |
1858 | irqflags, | |
1859 | ISICOM_NAME, &isi_card[count])) { | |
1860 | ||
1861 | printk(KERN_WARNING "ISICOM: Could not" | |
1862 | " install handler at Irq %d." | |
1863 | " Card%d will be disabled.\n", | |
1864 | isi_card[count].irq, count+1); | |
1865 | ||
1866 | release_region(isi_card[count].base,16); | |
1867 | isi_card[count].base=0; | |
1868 | } | |
1869 | else | |
1870 | done++; | |
1871 | } | |
1872 | } | |
1873 | return done; | |
1874 | } | |
1875 | ||
1876 | static void __exit unregister_isr(void) | |
1877 | { | |
1878 | int count; | |
1879 | ||
1880 | for (count=0; count < BOARD_COUNT; count++ ) { | |
1881 | if (isi_card[count].base) | |
1882 | free_irq(isi_card[count].irq, &isi_card[count]); | |
1883 | } | |
1884 | } | |
1885 | ||
1886 | static int __init isicom_init(void) | |
1887 | { | |
1888 | int card, channel, base; | |
1889 | struct isi_port * port; | |
1890 | unsigned long page; | |
1891 | ||
1892 | if (!tmp_buf) { | |
1893 | page = get_zeroed_page(GFP_KERNEL); | |
1894 | if (!page) { | |
1895 | #ifdef ISICOM_DEBUG | |
1896 | printk(KERN_DEBUG "ISICOM: Couldn't allocate page for tmp_buf.\n"); | |
1897 | #else | |
1898 | printk(KERN_ERR "ISICOM: Not enough memory...\n"); | |
1899 | #endif | |
1900 | return 0; | |
1901 | } | |
1902 | tmp_buf = (unsigned char *) page; | |
1903 | } | |
1904 | ||
1905 | if (!register_ioregion()) | |
1906 | { | |
1907 | printk(KERN_ERR "ISICOM: All required I/O space found busy.\n"); | |
1908 | free_page((unsigned long)tmp_buf); | |
1909 | return 0; | |
1910 | } | |
1911 | if (register_drivers()) | |
1912 | { | |
1913 | unregister_ioregion(); | |
1914 | free_page((unsigned long)tmp_buf); | |
1915 | return 0; | |
1916 | } | |
1917 | if (!register_isr()) | |
1918 | { | |
1919 | unregister_drivers(); | |
1920 | /* ioports already uregistered in register_isr */ | |
1921 | free_page((unsigned long)tmp_buf); | |
1922 | return 0; | |
1923 | } | |
1924 | ||
1925 | memset(isi_ports, 0, sizeof(isi_ports)); | |
1926 | for (card = 0; card < BOARD_COUNT; card++) { | |
1927 | port = &isi_ports[card * 16]; | |
1928 | isi_card[card].ports = port; | |
1929 | spin_lock_init(&isi_card[card].card_lock); | |
1930 | base = isi_card[card].base; | |
1931 | for (channel = 0; channel < 16; channel++, port++) { | |
1932 | port->magic = ISICOM_MAGIC; | |
1933 | port->card = &isi_card[card]; | |
1934 | port->channel = channel; | |
1935 | port->close_delay = 50 * HZ/100; | |
1936 | port->closing_wait = 3000 * HZ/100; | |
1937 | INIT_WORK(&port->hangup_tq, do_isicom_hangup, port); | |
1938 | INIT_WORK(&port->bh_tqueue, isicom_bottomhalf, port); | |
1939 | port->status = 0; | |
1940 | init_waitqueue_head(&port->open_wait); | |
1941 | init_waitqueue_head(&port->close_wait); | |
1942 | /* . . . */ | |
1943 | } | |
1944 | } | |
1945 | ||
1946 | return 1; | |
1947 | } | |
1948 | ||
1949 | /* | |
1950 | * Insmod can set static symbols so keep these static | |
1951 | */ | |
1952 | ||
1953 | static int io[4]; | |
1954 | static int irq[4]; | |
1955 | ||
1956 | MODULE_AUTHOR("MultiTech"); | |
1957 | MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech"); | |
1958 | MODULE_LICENSE("GPL"); | |
1959 | module_param_array(io, int, NULL, 0); | |
1960 | MODULE_PARM_DESC(io, "I/O ports for the cards"); | |
1961 | module_param_array(irq, int, NULL, 0); | |
1962 | MODULE_PARM_DESC(irq, "Interrupts for the cards"); | |
1963 | ||
1964 | static int __devinit isicom_setup(void) | |
1965 | { | |
1966 | struct pci_dev *dev = NULL; | |
1967 | int retval, card, idx, count; | |
1968 | unsigned char pciirq; | |
1969 | unsigned int ioaddr; | |
1970 | ||
1971 | card = 0; | |
1972 | for(idx=0; idx < BOARD_COUNT; idx++) { | |
1973 | if (io[idx]) { | |
1974 | isi_card[idx].base=io[idx]; | |
1975 | isi_card[idx].irq=irq[idx]; | |
1976 | isi_card[idx].isa=YES; | |
1977 | card++; | |
1978 | } | |
1979 | else { | |
1980 | isi_card[idx].base = 0; | |
1981 | isi_card[idx].irq = 0; | |
1982 | } | |
1983 | } | |
1984 | ||
1985 | for (idx=0 ;idx < card; idx++) { | |
1986 | if (!((isi_card[idx].irq==2)||(isi_card[idx].irq==3)|| | |
1987 | (isi_card[idx].irq==4)||(isi_card[idx].irq==5)|| | |
1988 | (isi_card[idx].irq==7)||(isi_card[idx].irq==10)|| | |
1989 | (isi_card[idx].irq==11)||(isi_card[idx].irq==12)|| | |
1990 | (isi_card[idx].irq==15))) { | |
1991 | ||
1992 | if (isi_card[idx].base) { | |
1993 | printk(KERN_ERR "ISICOM: Irq %d unsupported. Disabling Card%d...\n", | |
1994 | isi_card[idx].irq, idx+1); | |
1995 | isi_card[idx].base=0; | |
1996 | card--; | |
1997 | } | |
1998 | } | |
1999 | } | |
2000 | ||
2001 | if (card < BOARD_COUNT) { | |
2002 | for (idx=0; idx < DEVID_COUNT; idx++) { | |
2003 | dev = NULL; | |
2004 | for (;;){ | |
2005 | if (!(dev = pci_find_device(VENDOR_ID, isicom_pci_tbl[idx].device, dev))) | |
2006 | break; | |
2007 | if (card >= BOARD_COUNT) | |
2008 | break; | |
2009 | ||
2010 | if (pci_enable_device(dev)) | |
2011 | break; | |
2012 | ||
2013 | /* found a PCI ISI card! */ | |
2014 | ioaddr = pci_resource_start (dev, 3); /* i.e at offset 0x1c in the | |
2015 | * PCI configuration register | |
2016 | * space. | |
2017 | */ | |
2018 | pciirq = dev->irq; | |
2019 | printk(KERN_INFO "ISI PCI Card(Device ID 0x%x)\n", isicom_pci_tbl[idx].device); | |
2020 | /* | |
2021 | * allot the first empty slot in the array | |
2022 | */ | |
2023 | for (count=0; count < BOARD_COUNT; count++) { | |
2024 | if (isi_card[count].base == 0) { | |
2025 | isi_card[count].base = ioaddr; | |
2026 | isi_card[count].irq = pciirq; | |
2027 | isi_card[count].isa = NO; | |
2028 | card++; | |
2029 | break; | |
2030 | } | |
2031 | } | |
2032 | } | |
2033 | if (card >= BOARD_COUNT) break; | |
2034 | } | |
2035 | } | |
2036 | ||
2037 | if (!(isi_card[0].base || isi_card[1].base || isi_card[2].base || isi_card[3].base)) { | |
2038 | printk(KERN_ERR "ISICOM: No valid card configuration. Driver cannot be initialized...\n"); | |
2039 | return -EIO; | |
2040 | } | |
2041 | ||
2042 | retval = misc_register(&isiloader_device); | |
2043 | if (retval < 0) { | |
2044 | printk(KERN_ERR "ISICOM: Unable to register firmware loader driver.\n"); | |
2045 | return retval; | |
2046 | } | |
2047 | ||
2048 | if (!isicom_init()) { | |
2049 | if (misc_deregister(&isiloader_device)) | |
2050 | printk(KERN_ERR "ISICOM: Unable to unregister Firmware Loader driver\n"); | |
2051 | return -EIO; | |
2052 | } | |
2053 | ||
2054 | init_timer(&tx); | |
2055 | tx.expires = jiffies + 1; | |
2056 | tx.data = 0; | |
2057 | tx.function = isicom_tx; | |
2058 | re_schedule = 1; | |
2059 | add_timer(&tx); | |
2060 | ||
2061 | return 0; | |
2062 | } | |
2063 | ||
2064 | static void __exit isicom_exit(void) | |
2065 | { | |
2066 | re_schedule = 0; | |
2067 | /* FIXME */ | |
2068 | msleep(1000); | |
2069 | unregister_isr(); | |
2070 | unregister_drivers(); | |
2071 | unregister_ioregion(); | |
2072 | if(tmp_buf) | |
2073 | free_page((unsigned long)tmp_buf); | |
2074 | if (misc_deregister(&isiloader_device)) | |
2075 | printk(KERN_ERR "ISICOM: Unable to unregister Firmware Loader driver\n"); | |
2076 | } | |
2077 | ||
2078 | module_init(isicom_setup); | |
2079 | module_exit(isicom_exit); |