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1da177e4 LT |
1 | /* |
2 | * PCBIT-D interface with isdn4linux | |
3 | * | |
4 | * Copyright (C) 1996 Universidade de Lisboa | |
5 | * | |
6 | * Written by Pedro Roque Marques (roque@di.fc.ul.pt) | |
7 | * | |
8 | * This software may be used and distributed according to the terms of | |
9 | * the GNU General Public License, incorporated herein by reference. | |
10 | */ | |
11 | ||
12 | /* | |
13 | * Fixes: | |
14 | * | |
15 | * Nuno Grilo <l38486@alfa.ist.utl.pt> | |
16 | * fixed msn_list NULL pointer dereference. | |
17 | * | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
21 | ||
1da177e4 LT |
22 | |
23 | #include <linux/kernel.h> | |
24 | ||
25 | #include <linux/types.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/mm.h> | |
28 | #include <linux/interrupt.h> | |
29 | #include <linux/string.h> | |
30 | #include <linux/skbuff.h> | |
31 | ||
32 | #include <linux/isdnif.h> | |
33 | #include <asm/string.h> | |
34 | #include <asm/io.h> | |
35 | #include <linux/ioport.h> | |
36 | ||
37 | #include "pcbit.h" | |
38 | #include "edss1.h" | |
39 | #include "layer2.h" | |
40 | #include "capi.h" | |
41 | ||
42 | ||
43 | extern ushort last_ref_num; | |
44 | ||
45 | static int pcbit_ioctl(isdn_ctrl* ctl); | |
46 | ||
47 | static char* pcbit_devname[MAX_PCBIT_CARDS] = { | |
48 | "pcbit0", | |
49 | "pcbit1", | |
50 | "pcbit2", | |
51 | "pcbit3" | |
52 | }; | |
53 | ||
54 | /* | |
55 | * prototypes | |
56 | */ | |
57 | ||
886cca3a AB |
58 | static int pcbit_command(isdn_ctrl* ctl); |
59 | static int pcbit_stat(u_char __user * buf, int len, int, int); | |
60 | static int pcbit_xmit(int driver, int chan, int ack, struct sk_buff *skb); | |
61 | static int pcbit_writecmd(const u_char __user *, int, int, int); | |
1da177e4 LT |
62 | |
63 | static int set_protocol_running(struct pcbit_dev * dev); | |
64 | ||
65 | static void pcbit_clear_msn(struct pcbit_dev *dev); | |
66 | static void pcbit_set_msn(struct pcbit_dev *dev, char *list); | |
67 | static int pcbit_check_msn(struct pcbit_dev *dev, char *msn); | |
68 | ||
69 | ||
1da177e4 LT |
70 | int pcbit_init_dev(int board, int mem_base, int irq) |
71 | { | |
72 | struct pcbit_dev *dev; | |
73 | isdn_if *dev_if; | |
74 | ||
41f96935 | 75 | if ((dev=kzalloc(sizeof(struct pcbit_dev), GFP_KERNEL)) == NULL) |
1da177e4 LT |
76 | { |
77 | printk("pcbit_init: couldn't malloc pcbit_dev struct\n"); | |
78 | return -ENOMEM; | |
79 | } | |
80 | ||
81 | dev_pcbit[board] = dev; | |
1da177e4 LT |
82 | init_waitqueue_head(&dev->set_running_wq); |
83 | spin_lock_init(&dev->lock); | |
84 | ||
85 | if (mem_base >= 0xA0000 && mem_base <= 0xFFFFF ) { | |
86 | dev->ph_mem = mem_base; | |
87 | if (!request_mem_region(dev->ph_mem, 4096, "PCBIT mem")) { | |
88 | printk(KERN_WARNING | |
89 | "PCBIT: memory region %lx-%lx already in use\n", | |
90 | dev->ph_mem, dev->ph_mem + 4096); | |
91 | kfree(dev); | |
92 | dev_pcbit[board] = NULL; | |
93 | return -EACCES; | |
94 | } | |
95 | dev->sh_mem = ioremap(dev->ph_mem, 4096); | |
96 | } | |
97 | else | |
98 | { | |
99 | printk("memory address invalid"); | |
100 | kfree(dev); | |
101 | dev_pcbit[board] = NULL; | |
102 | return -EACCES; | |
103 | } | |
104 | ||
41f96935 | 105 | dev->b1 = kzalloc(sizeof(struct pcbit_chan), GFP_KERNEL); |
1da177e4 LT |
106 | if (!dev->b1) { |
107 | printk("pcbit_init: couldn't malloc pcbit_chan struct\n"); | |
108 | iounmap(dev->sh_mem); | |
109 | release_mem_region(dev->ph_mem, 4096); | |
110 | kfree(dev); | |
111 | return -ENOMEM; | |
112 | } | |
113 | ||
41f96935 | 114 | dev->b2 = kzalloc(sizeof(struct pcbit_chan), GFP_KERNEL); |
1da177e4 LT |
115 | if (!dev->b2) { |
116 | printk("pcbit_init: couldn't malloc pcbit_chan struct\n"); | |
117 | kfree(dev->b1); | |
118 | iounmap(dev->sh_mem); | |
119 | release_mem_region(dev->ph_mem, 4096); | |
120 | kfree(dev); | |
121 | return -ENOMEM; | |
122 | } | |
123 | ||
1da177e4 LT |
124 | dev->b2->id = 1; |
125 | ||
c4028958 | 126 | INIT_WORK(&dev->qdelivery, pcbit_deliver); |
1da177e4 LT |
127 | |
128 | /* | |
129 | * interrupts | |
130 | */ | |
131 | ||
132 | if (request_irq(irq, &pcbit_irq_handler, 0, pcbit_devname[board], dev) != 0) | |
133 | { | |
134 | kfree(dev->b1); | |
135 | kfree(dev->b2); | |
136 | iounmap(dev->sh_mem); | |
137 | release_mem_region(dev->ph_mem, 4096); | |
138 | kfree(dev); | |
139 | dev_pcbit[board] = NULL; | |
140 | return -EIO; | |
141 | } | |
142 | ||
143 | dev->irq = irq; | |
144 | ||
145 | /* next frame to be received */ | |
146 | dev->rcv_seq = 0; | |
147 | dev->send_seq = 0; | |
148 | dev->unack_seq = 0; | |
149 | ||
150 | dev->hl_hdrlen = 16; | |
151 | ||
152 | dev_if = kmalloc(sizeof(isdn_if), GFP_KERNEL); | |
153 | ||
154 | if (!dev_if) { | |
155 | free_irq(irq, dev); | |
156 | kfree(dev->b1); | |
157 | kfree(dev->b2); | |
158 | iounmap(dev->sh_mem); | |
159 | release_mem_region(dev->ph_mem, 4096); | |
160 | kfree(dev); | |
161 | dev_pcbit[board] = NULL; | |
162 | return -EIO; | |
163 | } | |
164 | ||
165 | dev->dev_if = dev_if; | |
166 | ||
167 | dev_if->owner = THIS_MODULE; | |
168 | ||
169 | dev_if->channels = 2; | |
170 | ||
171 | dev_if->features = (ISDN_FEATURE_P_EURO | ISDN_FEATURE_L3_TRANS | | |
172 | ISDN_FEATURE_L2_HDLC | ISDN_FEATURE_L2_TRANS ); | |
173 | ||
174 | dev_if->writebuf_skb = pcbit_xmit; | |
175 | dev_if->hl_hdrlen = 16; | |
176 | ||
177 | dev_if->maxbufsize = MAXBUFSIZE; | |
178 | dev_if->command = pcbit_command; | |
179 | ||
180 | dev_if->writecmd = pcbit_writecmd; | |
181 | dev_if->readstat = pcbit_stat; | |
182 | ||
183 | ||
184 | strcpy(dev_if->id, pcbit_devname[board]); | |
185 | ||
186 | if (!register_isdn(dev_if)) { | |
187 | free_irq(irq, dev); | |
188 | kfree(dev->b1); | |
189 | kfree(dev->b2); | |
190 | iounmap(dev->sh_mem); | |
191 | release_mem_region(dev->ph_mem, 4096); | |
192 | kfree(dev); | |
193 | dev_pcbit[board] = NULL; | |
194 | return -EIO; | |
195 | } | |
196 | ||
197 | dev->id = dev_if->channels; | |
198 | ||
199 | ||
200 | dev->l2_state = L2_DOWN; | |
201 | dev->free = 511; | |
202 | ||
203 | /* | |
204 | * set_protocol_running(dev); | |
205 | */ | |
206 | ||
207 | return 0; | |
208 | } | |
209 | ||
210 | #ifdef MODULE | |
211 | void pcbit_terminate(int board) | |
212 | { | |
213 | struct pcbit_dev * dev; | |
214 | ||
215 | dev = dev_pcbit[board]; | |
216 | ||
217 | if (dev) { | |
218 | /* unregister_isdn(dev->dev_if); */ | |
219 | free_irq(dev->irq, dev); | |
220 | pcbit_clear_msn(dev); | |
221 | kfree(dev->dev_if); | |
222 | if (dev->b1->fsm_timer.function) | |
223 | del_timer(&dev->b1->fsm_timer); | |
224 | if (dev->b2->fsm_timer.function) | |
225 | del_timer(&dev->b2->fsm_timer); | |
226 | kfree(dev->b1); | |
227 | kfree(dev->b2); | |
228 | iounmap(dev->sh_mem); | |
229 | release_mem_region(dev->ph_mem, 4096); | |
230 | kfree(dev); | |
231 | } | |
232 | } | |
233 | #endif | |
234 | ||
886cca3a | 235 | static int pcbit_command(isdn_ctrl* ctl) |
1da177e4 LT |
236 | { |
237 | struct pcbit_dev *dev; | |
238 | struct pcbit_chan *chan; | |
239 | struct callb_data info; | |
240 | ||
241 | dev = finddev(ctl->driver); | |
242 | ||
243 | if (!dev) | |
244 | { | |
245 | printk("pcbit_command: unknown device\n"); | |
246 | return -1; | |
247 | } | |
248 | ||
249 | chan = (ctl->arg & 0x0F) ? dev->b2 : dev->b1; | |
250 | ||
251 | ||
252 | switch(ctl->command) { | |
253 | case ISDN_CMD_IOCTL: | |
254 | return pcbit_ioctl(ctl); | |
255 | break; | |
256 | case ISDN_CMD_DIAL: | |
257 | info.type = EV_USR_SETUP_REQ; | |
258 | info.data.setup.CalledPN = (char *) &ctl->parm.setup.phone; | |
259 | pcbit_fsm_event(dev, chan, EV_USR_SETUP_REQ, &info); | |
260 | break; | |
261 | case ISDN_CMD_ACCEPTD: | |
262 | pcbit_fsm_event(dev, chan, EV_USR_SETUP_RESP, NULL); | |
263 | break; | |
264 | case ISDN_CMD_ACCEPTB: | |
265 | printk("ISDN_CMD_ACCEPTB - not really needed\n"); | |
266 | break; | |
267 | case ISDN_CMD_HANGUP: | |
268 | pcbit_fsm_event(dev, chan, EV_USR_RELEASE_REQ, NULL); | |
269 | break; | |
270 | case ISDN_CMD_SETL2: | |
271 | chan->proto = (ctl->arg >> 8); | |
272 | break; | |
273 | case ISDN_CMD_CLREAZ: | |
274 | pcbit_clear_msn(dev); | |
275 | break; | |
276 | case ISDN_CMD_SETEAZ: | |
277 | pcbit_set_msn(dev, ctl->parm.num); | |
278 | break; | |
279 | case ISDN_CMD_SETL3: | |
280 | if ((ctl->arg >> 8) != ISDN_PROTO_L3_TRANS) | |
281 | printk(KERN_DEBUG "L3 protocol unknown\n"); | |
282 | break; | |
283 | default: | |
284 | printk(KERN_DEBUG "pcbit_command: unknown command\n"); | |
285 | break; | |
286 | }; | |
287 | ||
288 | return 0; | |
289 | } | |
290 | ||
291 | /* | |
292 | * Another Hack :-( | |
293 | * on some conditions the board stops sending TDATA_CONFs | |
294 | * let's see if we can turn around the problem | |
295 | */ | |
296 | ||
297 | #ifdef BLOCK_TIMER | |
298 | static void pcbit_block_timer(unsigned long data) | |
299 | { | |
300 | struct pcbit_chan *chan; | |
301 | struct pcbit_dev * dev; | |
302 | isdn_ctrl ictl; | |
303 | ||
304 | chan = (struct pcbit_chan *) data; | |
305 | ||
306 | dev = chan2dev(chan); | |
307 | ||
308 | if (dev == NULL) { | |
309 | printk(KERN_DEBUG "pcbit: chan2dev failed\n"); | |
310 | return; | |
311 | } | |
312 | ||
313 | del_timer(&chan->block_timer); | |
314 | chan->block_timer.function = NULL; | |
315 | ||
316 | #ifdef DEBUG | |
317 | printk(KERN_DEBUG "pcbit_block_timer\n"); | |
318 | #endif | |
319 | chan->queued = 0; | |
320 | ictl.driver = dev->id; | |
321 | ictl.command = ISDN_STAT_BSENT; | |
322 | ictl.arg = chan->id; | |
323 | dev->dev_if->statcallb(&ictl); | |
324 | } | |
325 | #endif | |
326 | ||
886cca3a | 327 | static int pcbit_xmit(int driver, int chnum, int ack, struct sk_buff *skb) |
1da177e4 LT |
328 | { |
329 | ushort hdrlen; | |
330 | int refnum, len; | |
331 | struct pcbit_chan * chan; | |
332 | struct pcbit_dev *dev; | |
333 | ||
334 | dev = finddev(driver); | |
335 | if (dev == NULL) | |
336 | { | |
337 | printk("finddev returned NULL"); | |
338 | return -1; | |
339 | } | |
340 | ||
341 | chan = chnum ? dev->b2 : dev->b1; | |
342 | ||
343 | ||
344 | if (chan->fsm_state != ST_ACTIVE) | |
345 | return -1; | |
346 | ||
347 | if (chan->queued >= MAX_QUEUED ) | |
348 | { | |
349 | #ifdef DEBUG_QUEUE | |
350 | printk(KERN_DEBUG | |
351 | "pcbit: %d packets already in queue - write fails\n", | |
352 | chan->queued); | |
353 | #endif | |
354 | /* | |
355 | * packet stays on the head of the device queue | |
356 | * since dev_start_xmit will fail | |
357 | * see net/core/dev.c | |
358 | */ | |
359 | #ifdef BLOCK_TIMER | |
360 | if (chan->block_timer.function == NULL) { | |
361 | init_timer(&chan->block_timer); | |
362 | chan->block_timer.function = &pcbit_block_timer; | |
363 | chan->block_timer.data = (long) chan; | |
364 | chan->block_timer.expires = jiffies + 1 * HZ; | |
365 | add_timer(&chan->block_timer); | |
366 | } | |
367 | #endif | |
368 | return 0; | |
369 | } | |
370 | ||
371 | ||
372 | chan->queued++; | |
373 | ||
374 | len = skb->len; | |
375 | ||
376 | hdrlen = capi_tdata_req(chan, skb); | |
377 | ||
378 | refnum = last_ref_num++ & 0x7fffU; | |
379 | chan->s_refnum = refnum; | |
380 | ||
381 | pcbit_l2_write(dev, MSG_TDATA_REQ, refnum, skb, hdrlen); | |
382 | ||
383 | return len; | |
384 | } | |
385 | ||
886cca3a | 386 | static int pcbit_writecmd(const u_char __user *buf, int len, int driver, int channel) |
1da177e4 LT |
387 | { |
388 | struct pcbit_dev * dev; | |
389 | int i, j; | |
390 | const u_char * loadbuf; | |
391 | u_char * ptr = NULL; | |
392 | u_char *cbuf; | |
393 | ||
394 | int errstat; | |
395 | ||
396 | dev = finddev(driver); | |
397 | ||
398 | if (!dev) | |
399 | { | |
400 | printk("pcbit_writecmd: couldn't find device"); | |
401 | return -ENODEV; | |
402 | } | |
403 | ||
404 | switch(dev->l2_state) { | |
405 | case L2_LWMODE: | |
406 | /* check (size <= rdp_size); write buf into board */ | |
407 | if (len < 0 || len > BANK4 + 1 || len > 1024) | |
408 | { | |
409 | printk("pcbit_writecmd: invalid length %d\n", len); | |
410 | return -EINVAL; | |
411 | } | |
412 | ||
413 | cbuf = kmalloc(len, GFP_KERNEL); | |
414 | if (!cbuf) | |
415 | return -ENOMEM; | |
416 | ||
417 | if (copy_from_user(cbuf, buf, len)) { | |
418 | kfree(cbuf); | |
419 | return -EFAULT; | |
420 | } | |
421 | memcpy_toio(dev->sh_mem, cbuf, len); | |
422 | kfree(cbuf); | |
423 | return len; | |
424 | case L2_FWMODE: | |
425 | /* this is the hard part */ | |
426 | /* dumb board */ | |
427 | /* get it into kernel space */ | |
428 | if ((ptr = kmalloc(len, GFP_KERNEL))==NULL) | |
429 | return -ENOMEM; | |
430 | if (copy_from_user(ptr, buf, len)) { | |
431 | kfree(ptr); | |
432 | return -EFAULT; | |
433 | } | |
434 | loadbuf = ptr; | |
435 | ||
436 | errstat = 0; | |
437 | ||
438 | for (i=0; i < len; i++) | |
439 | { | |
440 | for(j=0; j < LOAD_RETRY; j++) | |
441 | if (!(readb(dev->sh_mem + dev->loadptr))) | |
442 | break; | |
443 | ||
444 | if (j == LOAD_RETRY) | |
445 | { | |
446 | errstat = -ETIME; | |
447 | printk("TIMEOUT i=%d\n", i); | |
448 | break; | |
449 | } | |
450 | writeb(loadbuf[i], dev->sh_mem + dev->loadptr + 1); | |
451 | writeb(0x01, dev->sh_mem + dev->loadptr); | |
452 | ||
453 | dev->loadptr += 2; | |
454 | if (dev->loadptr > LOAD_ZONE_END) | |
455 | dev->loadptr = LOAD_ZONE_START; | |
456 | } | |
457 | kfree(ptr); | |
458 | ||
459 | return errstat ? errstat : len; | |
460 | default: | |
461 | return -EBUSY; | |
462 | } | |
463 | } | |
464 | ||
465 | /* | |
466 | * demultiplexing of messages | |
467 | * | |
468 | */ | |
469 | ||
470 | void pcbit_l3_receive(struct pcbit_dev * dev, ulong msg, | |
471 | struct sk_buff * skb, | |
472 | ushort hdr_len, ushort refnum) | |
473 | { | |
474 | struct pcbit_chan *chan; | |
475 | struct sk_buff *skb2; | |
476 | unsigned short len; | |
477 | struct callb_data cbdata; | |
478 | int complete, err; | |
479 | isdn_ctrl ictl; | |
480 | ||
481 | switch(msg) { | |
482 | ||
483 | case MSG_TDATA_IND: | |
484 | if (!(chan = capi_channel(dev, skb))) { | |
485 | printk(KERN_WARNING | |
486 | "CAPI header: unknown channel id\n"); | |
487 | break; | |
488 | } | |
489 | chan->r_refnum = skb->data[7]; | |
490 | skb_pull(skb, 8); | |
491 | ||
492 | dev->dev_if->rcvcallb_skb(dev->id, chan->id, skb); | |
493 | ||
494 | if (capi_tdata_resp(chan, &skb2) > 0) | |
495 | pcbit_l2_write(dev, MSG_TDATA_RESP, refnum, | |
496 | skb2, skb2->len); | |
497 | return; | |
498 | break; | |
499 | case MSG_TDATA_CONF: | |
500 | if (!(chan = capi_channel(dev, skb))) { | |
501 | printk(KERN_WARNING | |
502 | "CAPI header: unknown channel id\n"); | |
503 | break; | |
504 | } | |
505 | ||
506 | #ifdef DEBUG | |
507 | if ( (*((ushort *) (skb->data + 2) )) != 0) { | |
508 | printk(KERN_DEBUG "TDATA_CONF error\n"); | |
509 | } | |
510 | #endif | |
511 | #ifdef BLOCK_TIMER | |
512 | if (chan->queued == MAX_QUEUED) { | |
513 | del_timer(&chan->block_timer); | |
514 | chan->block_timer.function = NULL; | |
515 | } | |
516 | ||
517 | #endif | |
518 | chan->queued--; | |
519 | ||
520 | ictl.driver = dev->id; | |
521 | ictl.command = ISDN_STAT_BSENT; | |
522 | ictl.arg = chan->id; | |
523 | dev->dev_if->statcallb(&ictl); | |
524 | break; | |
525 | ||
526 | case MSG_CONN_IND: | |
527 | /* | |
528 | * channel: 1st not used will do | |
529 | * if both are used we're in trouble | |
530 | */ | |
531 | ||
532 | if (!dev->b1->fsm_state) | |
533 | chan = dev->b1; | |
534 | else if (!dev->b2->fsm_state) | |
535 | chan = dev->b2; | |
536 | else { | |
537 | printk(KERN_INFO | |
538 | "Incoming connection: no channels available"); | |
539 | ||
540 | if ((len = capi_disc_req(*(ushort*)(skb->data), &skb2, CAUSE_NOCHAN)) > 0) | |
541 | pcbit_l2_write(dev, MSG_DISC_REQ, refnum, skb2, len); | |
542 | break; | |
543 | } | |
544 | ||
545 | cbdata.data.setup.CalledPN = NULL; | |
546 | cbdata.data.setup.CallingPN = NULL; | |
547 | ||
548 | capi_decode_conn_ind(chan, skb, &cbdata); | |
549 | cbdata.type = EV_NET_SETUP; | |
550 | ||
551 | pcbit_fsm_event(dev, chan, EV_NET_SETUP, NULL); | |
552 | ||
553 | if (pcbit_check_msn(dev, cbdata.data.setup.CallingPN)) | |
554 | pcbit_fsm_event(dev, chan, EV_USR_PROCED_REQ, &cbdata); | |
555 | else | |
556 | pcbit_fsm_event(dev, chan, EV_USR_RELEASE_REQ, NULL); | |
557 | ||
3c7208f2 JJ |
558 | kfree(cbdata.data.setup.CalledPN); |
559 | kfree(cbdata.data.setup.CallingPN); | |
1da177e4 LT |
560 | break; |
561 | ||
562 | case MSG_CONN_CONF: | |
563 | /* | |
564 | * We should be able to find the channel by the message | |
565 | * reference number. The current version of the firmware | |
566 | * doesn't sent the ref number correctly. | |
567 | */ | |
568 | #ifdef DEBUG | |
569 | printk(KERN_DEBUG "refnum=%04x b1=%04x b2=%04x\n", refnum, | |
570 | dev->b1->s_refnum, | |
571 | dev->b2->s_refnum); | |
572 | #endif | |
573 | /* We just try to find a channel in the right state */ | |
574 | ||
575 | if (dev->b1->fsm_state == ST_CALL_INIT) | |
576 | chan = dev->b1; | |
577 | else { | |
578 | if (dev->b2->s_refnum == ST_CALL_INIT) | |
579 | chan = dev->b2; | |
580 | else { | |
581 | chan = NULL; | |
582 | printk(KERN_WARNING "Connection Confirm - no channel in Call Init state\n"); | |
583 | break; | |
584 | } | |
585 | } | |
586 | if (capi_decode_conn_conf(chan, skb, &complete)) { | |
587 | printk(KERN_DEBUG "conn_conf indicates error\n"); | |
588 | pcbit_fsm_event(dev, chan, EV_ERROR, NULL); | |
589 | } | |
590 | else | |
591 | if (complete) | |
592 | pcbit_fsm_event(dev, chan, EV_NET_CALL_PROC, NULL); | |
593 | else | |
594 | pcbit_fsm_event(dev, chan, EV_NET_SETUP_ACK, NULL); | |
595 | break; | |
596 | case MSG_CONN_ACTV_IND: | |
597 | ||
598 | if (!(chan = capi_channel(dev, skb))) { | |
599 | printk(KERN_WARNING | |
600 | "CAPI header: unknown channel id\n"); | |
601 | break; | |
602 | } | |
603 | ||
604 | if (capi_decode_conn_actv_ind(chan, skb)) { | |
605 | printk("error in capi_decode_conn_actv_ind\n"); | |
606 | /* pcbit_fsm_event(dev, chan, EV_ERROR, NULL); */ | |
607 | break; | |
608 | } | |
609 | chan->r_refnum = refnum; | |
610 | pcbit_fsm_event(dev, chan, EV_NET_CONN, NULL); | |
611 | break; | |
612 | case MSG_CONN_ACTV_CONF: | |
613 | ||
614 | if (!(chan = capi_channel(dev, skb))) { | |
615 | printk(KERN_WARNING | |
616 | "CAPI header: unknown channel id\n"); | |
617 | break; | |
618 | } | |
619 | ||
620 | if (capi_decode_conn_actv_conf(chan, skb) == 0) | |
621 | pcbit_fsm_event(dev, chan, EV_NET_CONN_ACK, NULL); | |
622 | ||
623 | else | |
624 | printk(KERN_DEBUG "decode_conn_actv_conf failed\n"); | |
625 | break; | |
626 | ||
627 | case MSG_SELP_CONF: | |
628 | ||
629 | if (!(chan = capi_channel(dev, skb))) { | |
630 | printk(KERN_WARNING | |
631 | "CAPI header: unknown channel id\n"); | |
632 | break; | |
633 | } | |
634 | ||
635 | if (!(err = capi_decode_sel_proto_conf(chan, skb))) | |
636 | pcbit_fsm_event(dev, chan, EV_NET_SELP_RESP, NULL); | |
637 | else { | |
638 | /* Error */ | |
639 | printk("error %d - capi_decode_sel_proto_conf\n", err); | |
640 | } | |
641 | break; | |
642 | case MSG_ACT_TRANSP_CONF: | |
643 | if (!(chan = capi_channel(dev, skb))) { | |
644 | printk(KERN_WARNING | |
645 | "CAPI header: unknown channel id\n"); | |
646 | break; | |
647 | } | |
648 | ||
649 | if (!capi_decode_actv_trans_conf(chan, skb)) | |
650 | pcbit_fsm_event(dev, chan, EV_NET_ACTV_RESP, NULL); | |
651 | break; | |
652 | ||
653 | case MSG_DISC_IND: | |
654 | ||
655 | if (!(chan = capi_channel(dev, skb))) { | |
656 | printk(KERN_WARNING | |
657 | "CAPI header: unknown channel id\n"); | |
658 | break; | |
659 | } | |
660 | ||
661 | if (!capi_decode_disc_ind(chan, skb)) | |
662 | pcbit_fsm_event(dev, chan, EV_NET_DISC, NULL); | |
663 | else | |
664 | printk(KERN_WARNING "capi_decode_disc_ind - error\n"); | |
665 | break; | |
666 | case MSG_DISC_CONF: | |
667 | if (!(chan = capi_channel(dev, skb))) { | |
668 | printk(KERN_WARNING | |
669 | "CAPI header: unknown channel id\n"); | |
670 | break; | |
671 | } | |
672 | ||
673 | if (!capi_decode_disc_ind(chan, skb)) | |
674 | pcbit_fsm_event(dev, chan, EV_NET_RELEASE, NULL); | |
675 | else | |
676 | printk(KERN_WARNING "capi_decode_disc_conf - error\n"); | |
677 | break; | |
678 | case MSG_INFO_IND: | |
679 | #ifdef DEBUG | |
680 | printk(KERN_DEBUG "received Info Indication - discarded\n"); | |
681 | #endif | |
682 | break; | |
683 | #ifdef DEBUG | |
684 | case MSG_DEBUG_188: | |
685 | capi_decode_debug_188(skb->data, skb->len); | |
686 | break; | |
687 | ||
688 | default: | |
689 | printk(KERN_DEBUG "pcbit_l3_receive: unknown message %08lx\n", | |
690 | msg); | |
691 | break; | |
692 | #endif | |
693 | } | |
694 | ||
695 | kfree_skb(skb); | |
696 | ||
697 | } | |
698 | ||
699 | /* | |
700 | * Single statbuf | |
701 | * should be a statbuf per device | |
702 | */ | |
703 | ||
704 | static char statbuf[STATBUF_LEN]; | |
705 | static int stat_st = 0; | |
706 | static int stat_end = 0; | |
707 | ||
886cca3a | 708 | static int pcbit_stat(u_char __user *buf, int len, int driver, int channel) |
1da177e4 LT |
709 | { |
710 | int stat_count; | |
711 | stat_count = stat_end - stat_st; | |
712 | ||
713 | if (stat_count < 0) | |
714 | stat_count = STATBUF_LEN - stat_st + stat_end; | |
715 | ||
716 | /* FIXME: should we sleep and wait for more cookies ? */ | |
717 | if (len > stat_count) | |
718 | len = stat_count; | |
719 | ||
720 | if (stat_st < stat_end) | |
721 | { | |
7786ce19 JG |
722 | if (copy_to_user(buf, statbuf + stat_st, len)) |
723 | return -EFAULT; | |
1da177e4 LT |
724 | stat_st += len; |
725 | } | |
726 | else | |
727 | { | |
728 | if (len > STATBUF_LEN - stat_st) | |
729 | { | |
7786ce19 JG |
730 | if (copy_to_user(buf, statbuf + stat_st, |
731 | STATBUF_LEN - stat_st)) | |
732 | return -EFAULT; | |
733 | if (copy_to_user(buf, statbuf, | |
734 | len - (STATBUF_LEN - stat_st))) | |
735 | return -EFAULT; | |
1da177e4 LT |
736 | |
737 | stat_st = len - (STATBUF_LEN - stat_st); | |
738 | } | |
739 | else | |
740 | { | |
7786ce19 JG |
741 | if (copy_to_user(buf, statbuf + stat_st, len)) |
742 | return -EFAULT; | |
1da177e4 LT |
743 | |
744 | stat_st += len; | |
745 | ||
746 | if (stat_st == STATBUF_LEN) | |
747 | stat_st = 0; | |
748 | } | |
749 | } | |
750 | ||
751 | if (stat_st == stat_end) | |
752 | stat_st = stat_end = 0; | |
753 | ||
754 | return len; | |
755 | } | |
756 | ||
757 | static void pcbit_logstat(struct pcbit_dev *dev, char *str) | |
758 | { | |
759 | int i; | |
760 | isdn_ctrl ictl; | |
761 | ||
762 | for (i=stat_end; i<strlen(str); i++) | |
763 | { | |
764 | statbuf[i]=str[i]; | |
765 | stat_end = (stat_end + 1) % STATBUF_LEN; | |
766 | if (stat_end == stat_st) | |
767 | stat_st = (stat_st + 1) % STATBUF_LEN; | |
768 | } | |
769 | ||
770 | ictl.command=ISDN_STAT_STAVAIL; | |
771 | ictl.driver=dev->id; | |
772 | ictl.arg=strlen(str); | |
773 | dev->dev_if->statcallb(&ictl); | |
774 | } | |
775 | ||
1da177e4 LT |
776 | void pcbit_state_change(struct pcbit_dev * dev, struct pcbit_chan * chan, |
777 | unsigned short i, unsigned short ev, unsigned short f) | |
778 | { | |
779 | char buf[256]; | |
780 | ||
781 | sprintf(buf, "change on device: %d channel:%d\n%s -> %s -> %s\n", | |
782 | dev->id, chan->id, | |
783 | isdn_state_table[i], strisdnevent(ev), isdn_state_table[f] | |
784 | ); | |
785 | ||
786 | #ifdef DEBUG | |
787 | printk("%s", buf); | |
788 | #endif | |
789 | ||
790 | pcbit_logstat(dev, buf); | |
791 | } | |
792 | ||
793 | static void set_running_timeout(unsigned long ptr) | |
794 | { | |
795 | struct pcbit_dev * dev; | |
796 | ||
797 | #ifdef DEBUG | |
798 | printk(KERN_DEBUG "set_running_timeout\n"); | |
799 | #endif | |
800 | dev = (struct pcbit_dev *) ptr; | |
801 | ||
802 | wake_up_interruptible(&dev->set_running_wq); | |
803 | } | |
804 | ||
805 | static int set_protocol_running(struct pcbit_dev * dev) | |
806 | { | |
807 | isdn_ctrl ctl; | |
808 | ||
809 | init_timer(&dev->set_running_timer); | |
810 | ||
811 | dev->set_running_timer.function = &set_running_timeout; | |
812 | dev->set_running_timer.data = (ulong) dev; | |
813 | dev->set_running_timer.expires = jiffies + SET_RUN_TIMEOUT; | |
814 | ||
815 | /* kick it */ | |
816 | ||
817 | dev->l2_state = L2_STARTING; | |
818 | ||
819 | writeb((0x80U | ((dev->rcv_seq & 0x07) << 3) | (dev->send_seq & 0x07)), | |
820 | dev->sh_mem + BANK4); | |
821 | ||
822 | add_timer(&dev->set_running_timer); | |
823 | ||
824 | interruptible_sleep_on(&dev->set_running_wq); | |
825 | ||
826 | del_timer(&dev->set_running_timer); | |
827 | ||
828 | if (dev->l2_state == L2_RUNNING) | |
829 | { | |
830 | printk(KERN_DEBUG "pcbit: running\n"); | |
831 | ||
832 | dev->unack_seq = dev->send_seq; | |
833 | ||
834 | dev->writeptr = dev->sh_mem; | |
835 | dev->readptr = dev->sh_mem + BANK2; | |
836 | ||
837 | /* tell the good news to the upper layer */ | |
838 | ctl.driver = dev->id; | |
839 | ctl.command = ISDN_STAT_RUN; | |
840 | ||
841 | dev->dev_if->statcallb(&ctl); | |
842 | } | |
843 | else | |
844 | { | |
845 | printk(KERN_DEBUG "pcbit: initialization failed\n"); | |
846 | printk(KERN_DEBUG "pcbit: firmware not loaded\n"); | |
847 | ||
848 | dev->l2_state = L2_DOWN; | |
849 | ||
850 | #ifdef DEBUG | |
851 | printk(KERN_DEBUG "Bank3 = %02x\n", | |
852 | readb(dev->sh_mem + BANK3)); | |
853 | #endif | |
854 | writeb(0x40, dev->sh_mem + BANK4); | |
855 | ||
856 | /* warn the upper layer */ | |
857 | ctl.driver = dev->id; | |
858 | ctl.command = ISDN_STAT_STOP; | |
859 | ||
860 | dev->dev_if->statcallb(&ctl); | |
861 | ||
862 | return -EL2HLT; /* Level 2 halted */ | |
863 | } | |
864 | ||
865 | return 0; | |
866 | } | |
867 | ||
868 | static int pcbit_ioctl(isdn_ctrl* ctl) | |
869 | { | |
870 | struct pcbit_dev * dev; | |
871 | struct pcbit_ioctl *cmd; | |
872 | ||
873 | dev = finddev(ctl->driver); | |
874 | ||
875 | if (!dev) | |
876 | { | |
877 | printk(KERN_DEBUG "pcbit_ioctl: unknown device\n"); | |
878 | return -ENODEV; | |
879 | } | |
880 | ||
881 | cmd = (struct pcbit_ioctl *) ctl->parm.num; | |
882 | ||
883 | switch(ctl->arg) { | |
884 | case PCBIT_IOCTL_GETSTAT: | |
885 | cmd->info.l2_status = dev->l2_state; | |
886 | break; | |
887 | ||
888 | case PCBIT_IOCTL_STRLOAD: | |
889 | if (dev->l2_state == L2_RUNNING) | |
890 | return -EBUSY; | |
891 | ||
892 | dev->unack_seq = dev->send_seq = dev->rcv_seq = 0; | |
893 | ||
894 | dev->writeptr = dev->sh_mem; | |
895 | dev->readptr = dev->sh_mem + BANK2; | |
896 | ||
897 | dev->l2_state = L2_LOADING; | |
898 | break; | |
899 | ||
900 | case PCBIT_IOCTL_LWMODE: | |
901 | if (dev->l2_state != L2_LOADING) | |
902 | return -EINVAL; | |
903 | ||
904 | dev->l2_state = L2_LWMODE; | |
905 | break; | |
906 | ||
907 | case PCBIT_IOCTL_FWMODE: | |
908 | if (dev->l2_state == L2_RUNNING) | |
909 | return -EBUSY; | |
910 | dev->loadptr = LOAD_ZONE_START; | |
911 | dev->l2_state = L2_FWMODE; | |
912 | ||
913 | break; | |
914 | case PCBIT_IOCTL_ENDLOAD: | |
915 | if (dev->l2_state == L2_RUNNING) | |
916 | return -EBUSY; | |
917 | dev->l2_state = L2_DOWN; | |
918 | break; | |
919 | ||
920 | case PCBIT_IOCTL_SETBYTE: | |
921 | if (dev->l2_state == L2_RUNNING) | |
922 | return -EBUSY; | |
923 | ||
924 | /* check addr */ | |
925 | if (cmd->info.rdp_byte.addr > BANK4) | |
926 | return -EFAULT; | |
927 | ||
928 | writeb(cmd->info.rdp_byte.value, dev->sh_mem + cmd->info.rdp_byte.addr); | |
929 | break; | |
930 | case PCBIT_IOCTL_GETBYTE: | |
931 | if (dev->l2_state == L2_RUNNING) | |
932 | return -EBUSY; | |
933 | ||
934 | /* check addr */ | |
935 | ||
936 | if (cmd->info.rdp_byte.addr > BANK4) | |
937 | { | |
938 | printk("getbyte: invalid addr %04x\n", cmd->info.rdp_byte.addr); | |
939 | return -EFAULT; | |
940 | } | |
941 | ||
942 | cmd->info.rdp_byte.value = readb(dev->sh_mem + cmd->info.rdp_byte.addr); | |
943 | break; | |
944 | case PCBIT_IOCTL_RUNNING: | |
945 | if (dev->l2_state == L2_RUNNING) | |
946 | return -EBUSY; | |
947 | return set_protocol_running(dev); | |
948 | break; | |
949 | case PCBIT_IOCTL_WATCH188: | |
950 | if (dev->l2_state != L2_LOADING) | |
951 | return -EINVAL; | |
952 | pcbit_l2_write(dev, MSG_WATCH188, 0x0001, NULL, 0); | |
953 | break; | |
954 | case PCBIT_IOCTL_PING188: | |
955 | if (dev->l2_state != L2_LOADING) | |
956 | return -EINVAL; | |
957 | pcbit_l2_write(dev, MSG_PING188_REQ, 0x0001, NULL, 0); | |
958 | break; | |
959 | case PCBIT_IOCTL_APION: | |
960 | if (dev->l2_state != L2_LOADING) | |
961 | return -EINVAL; | |
962 | pcbit_l2_write(dev, MSG_API_ON, 0x0001, NULL, 0); | |
963 | break; | |
964 | case PCBIT_IOCTL_STOP: | |
965 | dev->l2_state = L2_DOWN; | |
966 | writeb(0x40, dev->sh_mem + BANK4); | |
967 | dev->rcv_seq = 0; | |
968 | dev->send_seq = 0; | |
969 | dev->unack_seq = 0; | |
970 | break; | |
971 | default: | |
972 | printk("error: unknown ioctl\n"); | |
973 | break; | |
974 | }; | |
975 | return 0; | |
976 | } | |
977 | ||
978 | /* | |
979 | * MSN list handling | |
980 | * | |
981 | * if null reject all calls | |
982 | * if first entry has null MSN accept all calls | |
983 | */ | |
984 | ||
985 | static void pcbit_clear_msn(struct pcbit_dev *dev) | |
986 | { | |
987 | struct msn_entry *ptr, *back; | |
988 | ||
989 | for (ptr=dev->msn_list; ptr; ) | |
990 | { | |
991 | back = ptr->next; | |
992 | kfree(ptr); | |
993 | ptr = back; | |
994 | } | |
995 | ||
996 | dev->msn_list = NULL; | |
997 | } | |
998 | ||
999 | static void pcbit_set_msn(struct pcbit_dev *dev, char *list) | |
1000 | { | |
1001 | struct msn_entry *ptr; | |
1002 | struct msn_entry *back = NULL; | |
1003 | char *cp, *sp; | |
1004 | int len; | |
1005 | ||
1006 | if (strlen(list) == 0) { | |
1007 | ptr = kmalloc(sizeof(struct msn_entry), GFP_ATOMIC); | |
1008 | if (!ptr) { | |
1009 | printk(KERN_WARNING "kmalloc failed\n"); | |
1010 | return; | |
1011 | } | |
1012 | ||
1013 | ptr->msn = NULL; | |
1014 | ||
1015 | ptr->next = dev->msn_list; | |
1016 | dev->msn_list = ptr; | |
1017 | ||
1018 | return; | |
1019 | } | |
1020 | ||
1021 | if (dev->msn_list) | |
1022 | for (back=dev->msn_list; back->next; back=back->next); | |
1023 | ||
1024 | sp = list; | |
1025 | ||
1026 | do { | |
1027 | cp=strchr(sp, ','); | |
1028 | if (cp) | |
1029 | len = cp - sp; | |
1030 | else | |
1031 | len = strlen(sp); | |
1032 | ||
1033 | ptr = kmalloc(sizeof(struct msn_entry), GFP_ATOMIC); | |
1034 | ||
1035 | if (!ptr) { | |
1036 | printk(KERN_WARNING "kmalloc failed\n"); | |
1037 | return; | |
1038 | } | |
1039 | ptr->next = NULL; | |
1040 | ||
1041 | ptr->msn = kmalloc(len, GFP_ATOMIC); | |
1042 | if (!ptr->msn) { | |
1043 | printk(KERN_WARNING "kmalloc failed\n"); | |
1044 | kfree(ptr); | |
1045 | return; | |
1046 | } | |
1047 | ||
1048 | memcpy(ptr->msn, sp, len - 1); | |
1049 | ptr->msn[len] = 0; | |
1050 | ||
1051 | #ifdef DEBUG | |
1052 | printk(KERN_DEBUG "msn: %s\n", ptr->msn); | |
1053 | #endif | |
1054 | if (dev->msn_list == NULL) | |
1055 | dev->msn_list = ptr; | |
1056 | else | |
1057 | back->next = ptr; | |
1058 | back = ptr; | |
1059 | sp += len; | |
1060 | } while(cp); | |
1061 | } | |
1062 | ||
1063 | /* | |
1064 | * check if we do signal or reject an incoming call | |
1065 | */ | |
1066 | static int pcbit_check_msn(struct pcbit_dev *dev, char *msn) | |
1067 | { | |
1068 | struct msn_entry *ptr; | |
1069 | ||
1070 | for (ptr=dev->msn_list; ptr; ptr=ptr->next) { | |
1071 | ||
1072 | if (ptr->msn == NULL) | |
1073 | return 1; | |
1074 | ||
1075 | if (strcmp(ptr->msn, msn) == 0) | |
1076 | return 1; | |
1077 | } | |
1078 | ||
1079 | return 0; | |
1080 | } |