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12#include <linux/module.h>
13#include <linux/kernel.h>
14#include <linux/proc_fs.h>
15#include <linux/seq_file.h>
16#include <linux/skbuff.h>
17#include <linux/delay.h>
18#include <linux/mm.h>
19#include <linux/interrupt.h>
20#include <linux/ioport.h>
21#include <linux/pci.h>
22#include <linux/capi.h>
23#include <linux/kernelcapi.h>
24#include <linux/init.h>
25#include <linux/gfp.h>
26#include <asm/io.h>
27#include <asm/uaccess.h>
28#include <linux/netdevice.h>
29#include <linux/isdn/capicmd.h>
30#include <linux/isdn/capiutil.h>
31#include <linux/isdn/capilli.h>
32#include "avmcard.h"
33
34#undef AVM_C4_DEBUG
35#undef AVM_C4_POLLDEBUG
36
37
38
39static char *revision = "$Revision: 1.1.2.2 $";
40
41
42
43static bool suppress_pollack;
44
45static struct pci_device_id c4_pci_tbl[] = {
46 { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_21285, PCI_VENDOR_ID_AVM, PCI_DEVICE_ID_AVM_C4, 0, 0, (unsigned long)4 },
47 { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_21285, PCI_VENDOR_ID_AVM, PCI_DEVICE_ID_AVM_C2, 0, 0, (unsigned long)2 },
48 { }
49};
50
51MODULE_DEVICE_TABLE(pci, c4_pci_tbl);
52MODULE_DESCRIPTION("CAPI4Linux: Driver for AVM C2/C4 cards");
53MODULE_AUTHOR("Carsten Paeth");
54MODULE_LICENSE("GPL");
55module_param(suppress_pollack, bool, 0);
56
57
58
59static void c4_dispatch_tx(avmcard *card);
60
61
62
63#define DC21285_DRAM_A0MR 0x40000000
64#define DC21285_DRAM_A1MR 0x40004000
65#define DC21285_DRAM_A2MR 0x40008000
66#define DC21285_DRAM_A3MR 0x4000C000
67
68#define CAS_OFFSET 0x88
69
70#define DC21285_ARMCSR_BASE 0x42000000
71
72#define PCI_OUT_INT_STATUS 0x30
73#define PCI_OUT_INT_MASK 0x34
74#define MAILBOX_0 0x50
75#define MAILBOX_1 0x54
76#define MAILBOX_2 0x58
77#define MAILBOX_3 0x5C
78#define DOORBELL 0x60
79#define DOORBELL_SETUP 0x64
80
81#define CHAN_1_CONTROL 0x90
82#define CHAN_2_CONTROL 0xB0
83#define DRAM_TIMING 0x10C
84#define DRAM_ADDR_SIZE_0 0x110
85#define DRAM_ADDR_SIZE_1 0x114
86#define DRAM_ADDR_SIZE_2 0x118
87#define DRAM_ADDR_SIZE_3 0x11C
88#define SA_CONTROL 0x13C
89#define XBUS_CYCLE 0x148
90#define XBUS_STROBE 0x14C
91#define DBELL_PCI_MASK 0x150
92#define DBELL_SA_MASK 0x154
93
94#define SDRAM_SIZE 0x1000000
95
96
97
98#define MBOX_PEEK_POKE MAILBOX_0
99
100#define DBELL_ADDR 0x01
101#define DBELL_DATA 0x02
102#define DBELL_RNWR 0x40
103#define DBELL_INIT 0x80
104
105
106
107#define MBOX_UP_ADDR MAILBOX_0
108#define MBOX_UP_LEN MAILBOX_1
109#define MBOX_DOWN_ADDR MAILBOX_2
110#define MBOX_DOWN_LEN MAILBOX_3
111
112#define DBELL_UP_HOST 0x00000100
113#define DBELL_UP_ARM 0x00000200
114#define DBELL_DOWN_HOST 0x00000400
115#define DBELL_DOWN_ARM 0x00000800
116#define DBELL_RESET_HOST 0x40000000
117#define DBELL_RESET_ARM 0x80000000
118
119
120
121#define DRAM_TIMING_DEF 0x001A01A5
122#define DRAM_AD_SZ_DEF0 0x00000045
123#define DRAM_AD_SZ_NULL 0x00000000
124
125#define SA_CTL_ALLRIGHT 0x64AA0271
126
127#define INIT_XBUS_CYCLE 0x100016DB
128#define INIT_XBUS_STROBE 0xF1F1F1F1
129
130
131
132#define RESET_TIMEOUT (15 * HZ)
133#define PEEK_POKE_TIMEOUT (HZ / 10)
134
135
136
137#define c4outmeml(addr, value) writel(value, addr)
138#define c4inmeml(addr) readl(addr)
139#define c4outmemw(addr, value) writew(value, addr)
140#define c4inmemw(addr) readw(addr)
141#define c4outmemb(addr, value) writeb(value, addr)
142#define c4inmemb(addr) readb(addr)
143
144
145
146static inline int wait_for_doorbell(avmcard *card, unsigned long t)
147{
148 unsigned long stop;
149
150 stop = jiffies + t;
151 while (c4inmeml(card->mbase + DOORBELL) != 0xffffffff) {
152 if (!time_before(jiffies, stop))
153 return -1;
154 mb();
155 }
156 return 0;
157}
158
159static int c4_poke(avmcard *card, unsigned long off, unsigned long value)
160{
161
162 if (wait_for_doorbell(card, HZ / 10) < 0)
163 return -1;
164
165 c4outmeml(card->mbase + MBOX_PEEK_POKE, off);
166 c4outmeml(card->mbase + DOORBELL, DBELL_ADDR);
167
168 if (wait_for_doorbell(card, HZ / 10) < 0)
169 return -1;
170
171 c4outmeml(card->mbase + MBOX_PEEK_POKE, value);
172 c4outmeml(card->mbase + DOORBELL, DBELL_DATA | DBELL_ADDR);
173
174 return 0;
175}
176
177static int c4_peek(avmcard *card, unsigned long off, unsigned long *valuep)
178{
179 if (wait_for_doorbell(card, HZ / 10) < 0)
180 return -1;
181
182 c4outmeml(card->mbase + MBOX_PEEK_POKE, off);
183 c4outmeml(card->mbase + DOORBELL, DBELL_RNWR | DBELL_ADDR);
184
185 if (wait_for_doorbell(card, HZ / 10) < 0)
186 return -1;
187
188 *valuep = c4inmeml(card->mbase + MBOX_PEEK_POKE);
189
190 return 0;
191}
192
193
194
195static int c4_load_t4file(avmcard *card, capiloaddatapart *t4file)
196{
197 u32 val;
198 unsigned char *dp;
199 u_int left;
200 u32 loadoff = 0;
201
202 dp = t4file->data;
203 left = t4file->len;
204 while (left >= sizeof(u32)) {
205 if (t4file->user) {
206 if (copy_from_user(&val, dp, sizeof(val)))
207 return -EFAULT;
208 } else {
209 memcpy(&val, dp, sizeof(val));
210 }
211 if (c4_poke(card, loadoff, val)) {
212 printk(KERN_ERR "%s: corrupted firmware file ?\n",
213 card->name);
214 return -EIO;
215 }
216 left -= sizeof(u32);
217 dp += sizeof(u32);
218 loadoff += sizeof(u32);
219 }
220 if (left) {
221 val = 0;
222 if (t4file->user) {
223 if (copy_from_user(&val, dp, left))
224 return -EFAULT;
225 } else {
226 memcpy(&val, dp, left);
227 }
228 if (c4_poke(card, loadoff, val)) {
229 printk(KERN_ERR "%s: corrupted firmware file ?\n",
230 card->name);
231 return -EIO;
232 }
233 }
234 return 0;
235}
236
237
238
239static inline void _put_byte(void **pp, u8 val)
240{
241 u8 *s = *pp;
242 *s++ = val;
243 *pp = s;
244}
245
246static inline void _put_word(void **pp, u32 val)
247{
248 u8 *s = *pp;
249 *s++ = val & 0xff;
250 *s++ = (val >> 8) & 0xff;
251 *s++ = (val >> 16) & 0xff;
252 *s++ = (val >> 24) & 0xff;
253 *pp = s;
254}
255
256static inline void _put_slice(void **pp, unsigned char *dp, unsigned int len)
257{
258 unsigned i = len;
259 _put_word(pp, i);
260 while (i-- > 0)
261 _put_byte(pp, *dp++);
262}
263
264static inline u8 _get_byte(void **pp)
265{
266 u8 *s = *pp;
267 u8 val;
268 val = *s++;
269 *pp = s;
270 return val;
271}
272
273static inline u32 _get_word(void **pp)
274{
275 u8 *s = *pp;
276 u32 val;
277 val = *s++;
278 val |= (*s++ << 8);
279 val |= (*s++ << 16);
280 val |= (*s++ << 24);
281 *pp = s;
282 return val;
283}
284
285static inline u32 _get_slice(void **pp, unsigned char *dp)
286{
287 unsigned int len, i;
288
289 len = i = _get_word(pp);
290 while (i-- > 0) *dp++ = _get_byte(pp);
291 return len;
292}
293
294
295
296static void c4_reset(avmcard *card)
297{
298 unsigned long stop;
299
300 c4outmeml(card->mbase + DOORBELL, DBELL_RESET_ARM);
301
302 stop = jiffies + HZ * 10;
303 while (c4inmeml(card->mbase + DOORBELL) != 0xffffffff) {
304 if (!time_before(jiffies, stop))
305 return;
306 c4outmeml(card->mbase + DOORBELL, DBELL_ADDR);
307 mb();
308 }
309
310 c4_poke(card, DC21285_ARMCSR_BASE + CHAN_1_CONTROL, 0);
311 c4_poke(card, DC21285_ARMCSR_BASE + CHAN_2_CONTROL, 0);
312}
313
314
315
316static int c4_detect(avmcard *card)
317{
318 unsigned long stop, dummy;
319
320 c4outmeml(card->mbase + PCI_OUT_INT_MASK, 0x0c);
321 if (c4inmeml(card->mbase + PCI_OUT_INT_MASK) != 0x0c)
322 return 1;
323
324 c4outmeml(card->mbase + DOORBELL, DBELL_RESET_ARM);
325
326 stop = jiffies + HZ * 10;
327 while (c4inmeml(card->mbase + DOORBELL) != 0xffffffff) {
328 if (!time_before(jiffies, stop))
329 return 2;
330 c4outmeml(card->mbase + DOORBELL, DBELL_ADDR);
331 mb();
332 }
333
334 c4_poke(card, DC21285_ARMCSR_BASE + CHAN_1_CONTROL, 0);
335 c4_poke(card, DC21285_ARMCSR_BASE + CHAN_2_CONTROL, 0);
336
337 c4outmeml(card->mbase + MAILBOX_0, 0x55aa55aa);
338 if (c4inmeml(card->mbase + MAILBOX_0) != 0x55aa55aa) return 3;
339
340 c4outmeml(card->mbase + MAILBOX_0, 0xaa55aa55);
341 if (c4inmeml(card->mbase + MAILBOX_0) != 0xaa55aa55) return 4;
342
343 if (c4_poke(card, DC21285_ARMCSR_BASE + DBELL_SA_MASK, 0)) return 5;
344 if (c4_poke(card, DC21285_ARMCSR_BASE + DBELL_PCI_MASK, 0)) return 6;
345 if (c4_poke(card, DC21285_ARMCSR_BASE + SA_CONTROL, SA_CTL_ALLRIGHT))
346 return 7;
347 if (c4_poke(card, DC21285_ARMCSR_BASE + XBUS_CYCLE, INIT_XBUS_CYCLE))
348 return 8;
349 if (c4_poke(card, DC21285_ARMCSR_BASE + XBUS_STROBE, INIT_XBUS_STROBE))
350 return 8;
351 if (c4_poke(card, DC21285_ARMCSR_BASE + DRAM_TIMING, 0)) return 9;
352
353 mdelay(1);
354
355 if (c4_peek(card, DC21285_DRAM_A0MR, &dummy)) return 10;
356 if (c4_peek(card, DC21285_DRAM_A1MR, &dummy)) return 11;
357 if (c4_peek(card, DC21285_DRAM_A2MR, &dummy)) return 12;
358 if (c4_peek(card, DC21285_DRAM_A3MR, &dummy)) return 13;
359
360 if (c4_poke(card, DC21285_DRAM_A0MR + CAS_OFFSET, 0)) return 14;
361 if (c4_poke(card, DC21285_DRAM_A1MR + CAS_OFFSET, 0)) return 15;
362 if (c4_poke(card, DC21285_DRAM_A2MR + CAS_OFFSET, 0)) return 16;
363 if (c4_poke(card, DC21285_DRAM_A3MR + CAS_OFFSET, 0)) return 17;
364
365 mdelay(1);
366
367 if (c4_poke(card, DC21285_ARMCSR_BASE + DRAM_TIMING, DRAM_TIMING_DEF))
368 return 18;
369
370 if (c4_poke(card, DC21285_ARMCSR_BASE + DRAM_ADDR_SIZE_0, DRAM_AD_SZ_DEF0))
371 return 19;
372 if (c4_poke(card, DC21285_ARMCSR_BASE + DRAM_ADDR_SIZE_1, DRAM_AD_SZ_NULL))
373 return 20;
374 if (c4_poke(card, DC21285_ARMCSR_BASE + DRAM_ADDR_SIZE_2, DRAM_AD_SZ_NULL))
375 return 21;
376 if (c4_poke(card, DC21285_ARMCSR_BASE + DRAM_ADDR_SIZE_3, DRAM_AD_SZ_NULL))
377 return 22;
378
379
380
381 if (c4_poke(card, 0x000000, 0x11111111)
382 || c4_poke(card, 0x400000, 0x22222222)
383 || c4_poke(card, 0x800000, 0x33333333)
384 || c4_poke(card, 0xC00000, 0x44444444))
385 return 23;
386
387 if (c4_peek(card, 0x000000, &dummy) || dummy != 0x11111111
388 || c4_peek(card, 0x400000, &dummy) || dummy != 0x22222222
389 || c4_peek(card, 0x800000, &dummy) || dummy != 0x33333333
390 || c4_peek(card, 0xC00000, &dummy) || dummy != 0x44444444)
391 return 24;
392
393 if (c4_poke(card, 0x000000, 0x55555555)
394 || c4_poke(card, 0x400000, 0x66666666)
395 || c4_poke(card, 0x800000, 0x77777777)
396 || c4_poke(card, 0xC00000, 0x88888888))
397 return 25;
398
399 if (c4_peek(card, 0x000000, &dummy) || dummy != 0x55555555
400 || c4_peek(card, 0x400000, &dummy) || dummy != 0x66666666
401 || c4_peek(card, 0x800000, &dummy) || dummy != 0x77777777
402 || c4_peek(card, 0xC00000, &dummy) || dummy != 0x88888888)
403 return 26;
404
405 return 0;
406}
407
408
409
410static void c4_dispatch_tx(avmcard *card)
411{
412 avmcard_dmainfo *dma = card->dma;
413 struct sk_buff *skb;
414 u8 cmd, subcmd;
415 u16 len;
416 u32 txlen;
417 void *p;
418
419
420 if (card->csr & DBELL_DOWN_ARM) {
421 return;
422 }
423
424 skb = skb_dequeue(&dma->send_queue);
425 if (!skb) {
426#ifdef AVM_C4_DEBUG
427 printk(KERN_DEBUG "%s: tx underrun\n", card->name);
428#endif
429 return;
430 }
431
432 len = CAPIMSG_LEN(skb->data);
433
434 if (len) {
435 cmd = CAPIMSG_COMMAND(skb->data);
436 subcmd = CAPIMSG_SUBCOMMAND(skb->data);
437
438 p = dma->sendbuf.dmabuf;
439
440 if (CAPICMD(cmd, subcmd) == CAPI_DATA_B3_REQ) {
441 u16 dlen = CAPIMSG_DATALEN(skb->data);
442 _put_byte(&p, SEND_DATA_B3_REQ);
443 _put_slice(&p, skb->data, len);
444 _put_slice(&p, skb->data + len, dlen);
445 } else {
446 _put_byte(&p, SEND_MESSAGE);
447 _put_slice(&p, skb->data, len);
448 }
449 txlen = (u8 *)p - (u8 *)dma->sendbuf.dmabuf;
450#ifdef AVM_C4_DEBUG
451 printk(KERN_DEBUG "%s: tx put msg len=%d\n", card->name, txlen);
452#endif
453 } else {
454 txlen = skb->len - 2;
455#ifdef AVM_C4_POLLDEBUG
456 if (skb->data[2] == SEND_POLLACK)
457 printk(KERN_INFO "%s: ack to c4\n", card->name);
458#endif
459#ifdef AVM_C4_DEBUG
460 printk(KERN_DEBUG "%s: tx put 0x%x len=%d\n",
461 card->name, skb->data[2], txlen);
462#endif
463 skb_copy_from_linear_data_offset(skb, 2, dma->sendbuf.dmabuf,
464 skb->len - 2);
465 }
466 txlen = (txlen + 3) & ~3;
467
468 c4outmeml(card->mbase + MBOX_DOWN_ADDR, dma->sendbuf.dmaaddr);
469 c4outmeml(card->mbase + MBOX_DOWN_LEN, txlen);
470
471 card->csr |= DBELL_DOWN_ARM;
472
473 c4outmeml(card->mbase + DOORBELL, DBELL_DOWN_ARM);
474
475 dev_kfree_skb_any(skb);
476}
477
478
479
480static void queue_pollack(avmcard *card)
481{
482 struct sk_buff *skb;
483 void *p;
484
485 skb = alloc_skb(3, GFP_ATOMIC);
486 if (!skb) {
487 printk(KERN_CRIT "%s: no memory, lost poll ack\n",
488 card->name);
489 return;
490 }
491 p = skb->data;
492 _put_byte(&p, 0);
493 _put_byte(&p, 0);
494 _put_byte(&p, SEND_POLLACK);
495 skb_put(skb, (u8 *)p - (u8 *)skb->data);
496
497 skb_queue_tail(&card->dma->send_queue, skb);
498 c4_dispatch_tx(card);
499}
500
501
502
503static void c4_handle_rx(avmcard *card)
504{
505 avmcard_dmainfo *dma = card->dma;
506 struct capi_ctr *ctrl;
507 avmctrl_info *cinfo;
508 struct sk_buff *skb;
509 void *p = dma->recvbuf.dmabuf;
510 u32 ApplId, MsgLen, DataB3Len, NCCI, WindowSize;
511 u8 b1cmd = _get_byte(&p);
512 u32 cidx;
513
514
515#ifdef AVM_C4_DEBUG
516 printk(KERN_DEBUG "%s: rx 0x%x len=%lu\n", card->name,
517 b1cmd, (unsigned long)dma->recvlen);
518#endif
519
520 switch (b1cmd) {
521 case RECEIVE_DATA_B3_IND:
522
523 ApplId = (unsigned) _get_word(&p);
524 MsgLen = _get_slice(&p, card->msgbuf);
525 DataB3Len = _get_slice(&p, card->databuf);
526 cidx = CAPIMSG_CONTROLLER(card->msgbuf)-card->cardnr;
527 if (cidx >= card->nlogcontr) cidx = 0;
528 ctrl = &card->ctrlinfo[cidx].capi_ctrl;
529
530 if (MsgLen < 30) {
531 memset(card->msgbuf + MsgLen, 0, 30 - MsgLen);
532 MsgLen = 30;
533 CAPIMSG_SETLEN(card->msgbuf, 30);
534 }
535 if (!(skb = alloc_skb(DataB3Len + MsgLen, GFP_ATOMIC))) {
536 printk(KERN_ERR "%s: incoming packet dropped\n",
537 card->name);
538 } else {
539 memcpy(skb_put(skb, MsgLen), card->msgbuf, MsgLen);
540 memcpy(skb_put(skb, DataB3Len), card->databuf, DataB3Len);
541 capi_ctr_handle_message(ctrl, ApplId, skb);
542 }
543 break;
544
545 case RECEIVE_MESSAGE:
546
547 ApplId = (unsigned) _get_word(&p);
548 MsgLen = _get_slice(&p, card->msgbuf);
549 cidx = CAPIMSG_CONTROLLER(card->msgbuf)-card->cardnr;
550 if (cidx >= card->nlogcontr) cidx = 0;
551 cinfo = &card->ctrlinfo[cidx];
552 ctrl = &card->ctrlinfo[cidx].capi_ctrl;
553
554 if (!(skb = alloc_skb(MsgLen, GFP_ATOMIC))) {
555 printk(KERN_ERR "%s: incoming packet dropped\n",
556 card->name);
557 } else {
558 memcpy(skb_put(skb, MsgLen), card->msgbuf, MsgLen);
559 if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_CONF)
560 capilib_data_b3_conf(&cinfo->ncci_head, ApplId,
561 CAPIMSG_NCCI(skb->data),
562 CAPIMSG_MSGID(skb->data));
563
564 capi_ctr_handle_message(ctrl, ApplId, skb);
565 }
566 break;
567
568 case RECEIVE_NEW_NCCI:
569
570 ApplId = _get_word(&p);
571 NCCI = _get_word(&p);
572 WindowSize = _get_word(&p);
573 cidx = (NCCI & 0x7f) - card->cardnr;
574 if (cidx >= card->nlogcontr) cidx = 0;
575
576 capilib_new_ncci(&card->ctrlinfo[cidx].ncci_head, ApplId, NCCI, WindowSize);
577
578 break;
579
580 case RECEIVE_FREE_NCCI:
581
582 ApplId = _get_word(&p);
583 NCCI = _get_word(&p);
584
585 if (NCCI != 0xffffffff) {
586 cidx = (NCCI & 0x7f) - card->cardnr;
587 if (cidx >= card->nlogcontr) cidx = 0;
588 capilib_free_ncci(&card->ctrlinfo[cidx].ncci_head, ApplId, NCCI);
589 }
590 break;
591
592 case RECEIVE_START:
593#ifdef AVM_C4_POLLDEBUG
594 printk(KERN_INFO "%s: poll from c4\n", card->name);
595#endif
596 if (!suppress_pollack)
597 queue_pollack(card);
598 for (cidx = 0; cidx < card->nr_controllers; cidx++) {
599 ctrl = &card->ctrlinfo[cidx].capi_ctrl;
600 capi_ctr_resume_output(ctrl);
601 }
602 break;
603
604 case RECEIVE_STOP:
605 for (cidx = 0; cidx < card->nr_controllers; cidx++) {
606 ctrl = &card->ctrlinfo[cidx].capi_ctrl;
607 capi_ctr_suspend_output(ctrl);
608 }
609 break;
610
611 case RECEIVE_INIT:
612
613 cidx = card->nlogcontr;
614 if (cidx >= card->nr_controllers) {
615 printk(KERN_ERR "%s: card with %d controllers ??\n",
616 card->name, cidx + 1);
617 break;
618 }
619 card->nlogcontr++;
620 cinfo = &card->ctrlinfo[cidx];
621 ctrl = &cinfo->capi_ctrl;
622 cinfo->versionlen = _get_slice(&p, cinfo->versionbuf);
623 b1_parse_version(cinfo);
624 printk(KERN_INFO "%s: %s-card (%s) now active\n",
625 card->name,
626 cinfo->version[VER_CARDTYPE],
627 cinfo->version[VER_DRIVER]);
628 capi_ctr_ready(&cinfo->capi_ctrl);
629 break;
630
631 case RECEIVE_TASK_READY:
632 ApplId = (unsigned) _get_word(&p);
633 MsgLen = _get_slice(&p, card->msgbuf);
634 card->msgbuf[MsgLen] = 0;
635 while (MsgLen > 0
636 && (card->msgbuf[MsgLen - 1] == '\n'
637 || card->msgbuf[MsgLen - 1] == '\r')) {
638 card->msgbuf[MsgLen - 1] = 0;
639 MsgLen--;
640 }
641 printk(KERN_INFO "%s: task %d \"%s\" ready.\n",
642 card->name, ApplId, card->msgbuf);
643 break;
644
645 case RECEIVE_DEBUGMSG:
646 MsgLen = _get_slice(&p, card->msgbuf);
647 card->msgbuf[MsgLen] = 0;
648 while (MsgLen > 0
649 && (card->msgbuf[MsgLen - 1] == '\n'
650 || card->msgbuf[MsgLen - 1] == '\r')) {
651 card->msgbuf[MsgLen - 1] = 0;
652 MsgLen--;
653 }
654 printk(KERN_INFO "%s: DEBUG: %s\n", card->name, card->msgbuf);
655 break;
656
657 default:
658 printk(KERN_ERR "%s: c4_interrupt: 0x%x ???\n",
659 card->name, b1cmd);
660 return;
661 }
662}
663
664
665
666static irqreturn_t c4_handle_interrupt(avmcard *card)
667{
668 unsigned long flags;
669 u32 status;
670
671 spin_lock_irqsave(&card->lock, flags);
672 status = c4inmeml(card->mbase + DOORBELL);
673
674 if (status & DBELL_RESET_HOST) {
675 u_int i;
676 c4outmeml(card->mbase + PCI_OUT_INT_MASK, 0x0c);
677 spin_unlock_irqrestore(&card->lock, flags);
678 if (card->nlogcontr == 0)
679 return IRQ_HANDLED;
680 printk(KERN_ERR "%s: unexpected reset\n", card->name);
681 for (i = 0; i < card->nr_controllers; i++) {
682 avmctrl_info *cinfo = &card->ctrlinfo[i];
683 memset(cinfo->version, 0, sizeof(cinfo->version));
684 spin_lock_irqsave(&card->lock, flags);
685 capilib_release(&cinfo->ncci_head);
686 spin_unlock_irqrestore(&card->lock, flags);
687 capi_ctr_down(&cinfo->capi_ctrl);
688 }
689 card->nlogcontr = 0;
690 return IRQ_HANDLED;
691 }
692
693 status &= (DBELL_UP_HOST | DBELL_DOWN_HOST);
694 if (!status) {
695 spin_unlock_irqrestore(&card->lock, flags);
696 return IRQ_HANDLED;
697 }
698 c4outmeml(card->mbase + DOORBELL, status);
699
700 if ((status & DBELL_UP_HOST) != 0) {
701 card->dma->recvlen = c4inmeml(card->mbase + MBOX_UP_LEN);
702 c4outmeml(card->mbase + MBOX_UP_LEN, 0);
703 c4_handle_rx(card);
704 card->dma->recvlen = 0;
705 c4outmeml(card->mbase + MBOX_UP_LEN, card->dma->recvbuf.size);
706 c4outmeml(card->mbase + DOORBELL, DBELL_UP_ARM);
707 }
708
709 if ((status & DBELL_DOWN_HOST) != 0) {
710 card->csr &= ~DBELL_DOWN_ARM;
711 c4_dispatch_tx(card);
712 } else if (card->csr & DBELL_DOWN_HOST) {
713 if (c4inmeml(card->mbase + MBOX_DOWN_LEN) == 0) {
714 card->csr &= ~DBELL_DOWN_ARM;
715 c4_dispatch_tx(card);
716 }
717 }
718 spin_unlock_irqrestore(&card->lock, flags);
719 return IRQ_HANDLED;
720}
721
722static irqreturn_t c4_interrupt(int interrupt, void *devptr)
723{
724 avmcard *card = devptr;
725
726 return c4_handle_interrupt(card);
727}
728
729
730
731static void c4_send_init(avmcard *card)
732{
733 struct sk_buff *skb;
734 void *p;
735 unsigned long flags;
736
737 skb = alloc_skb(15, GFP_ATOMIC);
738 if (!skb) {
739 printk(KERN_CRIT "%s: no memory, lost register appl.\n",
740 card->name);
741 return;
742 }
743 p = skb->data;
744 _put_byte(&p, 0);
745 _put_byte(&p, 0);
746 _put_byte(&p, SEND_INIT);
747 _put_word(&p, CAPI_MAXAPPL);
748 _put_word(&p, AVM_NCCI_PER_CHANNEL * 30);
749 _put_word(&p, card->cardnr - 1);
750 skb_put(skb, (u8 *)p - (u8 *)skb->data);
751
752 skb_queue_tail(&card->dma->send_queue, skb);
753 spin_lock_irqsave(&card->lock, flags);
754 c4_dispatch_tx(card);
755 spin_unlock_irqrestore(&card->lock, flags);
756}
757
758static int queue_sendconfigword(avmcard *card, u32 val)
759{
760 struct sk_buff *skb;
761 unsigned long flags;
762 void *p;
763
764 skb = alloc_skb(3 + 4, GFP_ATOMIC);
765 if (!skb) {
766 printk(KERN_CRIT "%s: no memory, send config\n",
767 card->name);
768 return -ENOMEM;
769 }
770 p = skb->data;
771 _put_byte(&p, 0);
772 _put_byte(&p, 0);
773 _put_byte(&p, SEND_CONFIG);
774 _put_word(&p, val);
775 skb_put(skb, (u8 *)p - (u8 *)skb->data);
776
777 skb_queue_tail(&card->dma->send_queue, skb);
778 spin_lock_irqsave(&card->lock, flags);
779 c4_dispatch_tx(card);
780 spin_unlock_irqrestore(&card->lock, flags);
781 return 0;
782}
783
784static int queue_sendconfig(avmcard *card, char cval[4])
785{
786 struct sk_buff *skb;
787 unsigned long flags;
788 void *p;
789
790 skb = alloc_skb(3 + 4, GFP_ATOMIC);
791 if (!skb) {
792 printk(KERN_CRIT "%s: no memory, send config\n",
793 card->name);
794 return -ENOMEM;
795 }
796 p = skb->data;
797 _put_byte(&p, 0);
798 _put_byte(&p, 0);
799 _put_byte(&p, SEND_CONFIG);
800 _put_byte(&p, cval[0]);
801 _put_byte(&p, cval[1]);
802 _put_byte(&p, cval[2]);
803 _put_byte(&p, cval[3]);
804 skb_put(skb, (u8 *)p - (u8 *)skb->data);
805
806 skb_queue_tail(&card->dma->send_queue, skb);
807
808 spin_lock_irqsave(&card->lock, flags);
809 c4_dispatch_tx(card);
810 spin_unlock_irqrestore(&card->lock, flags);
811 return 0;
812}
813
814static int c4_send_config(avmcard *card, capiloaddatapart *config)
815{
816 u8 val[4];
817 unsigned char *dp;
818 u_int left;
819 int retval;
820
821 if ((retval = queue_sendconfigword(card, 1)) != 0)
822 return retval;
823 if ((retval = queue_sendconfigword(card, config->len)) != 0)
824 return retval;
825
826 dp = config->data;
827 left = config->len;
828 while (left >= sizeof(u32)) {
829 if (config->user) {
830 if (copy_from_user(val, dp, sizeof(val)))
831 return -EFAULT;
832 } else {
833 memcpy(val, dp, sizeof(val));
834 }
835 if ((retval = queue_sendconfig(card, val)) != 0)
836 return retval;
837 left -= sizeof(val);
838 dp += sizeof(val);
839 }
840 if (left) {
841 memset(val, 0, sizeof(val));
842 if (config->user) {
843 if (copy_from_user(&val, dp, left))
844 return -EFAULT;
845 } else {
846 memcpy(&val, dp, left);
847 }
848 if ((retval = queue_sendconfig(card, val)) != 0)
849 return retval;
850 }
851
852 return 0;
853}
854
855static int c4_load_firmware(struct capi_ctr *ctrl, capiloaddata *data)
856{
857 avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
858 avmcard *card = cinfo->card;
859 int retval;
860
861 if ((retval = c4_load_t4file(card, &data->firmware))) {
862 printk(KERN_ERR "%s: failed to load t4file!!\n",
863 card->name);
864 c4_reset(card);
865 return retval;
866 }
867
868 card->csr = 0;
869 c4outmeml(card->mbase + MBOX_UP_LEN, 0);
870 c4outmeml(card->mbase + MBOX_DOWN_LEN, 0);
871 c4outmeml(card->mbase + DOORBELL, DBELL_INIT);
872 mdelay(1);
873 c4outmeml(card->mbase + DOORBELL,
874 DBELL_UP_HOST | DBELL_DOWN_HOST | DBELL_RESET_HOST);
875
876 c4outmeml(card->mbase + PCI_OUT_INT_MASK, 0x08);
877
878 card->dma->recvlen = 0;
879 c4outmeml(card->mbase + MBOX_UP_ADDR, card->dma->recvbuf.dmaaddr);
880 c4outmeml(card->mbase + MBOX_UP_LEN, card->dma->recvbuf.size);
881 c4outmeml(card->mbase + DOORBELL, DBELL_UP_ARM);
882
883 if (data->configuration.len > 0 && data->configuration.data) {
884 retval = c4_send_config(card, &data->configuration);
885 if (retval) {
886 printk(KERN_ERR "%s: failed to set config!!\n",
887 card->name);
888 c4_reset(card);
889 return retval;
890 }
891 }
892
893 c4_send_init(card);
894
895 return 0;
896}
897
898
899static void c4_reset_ctr(struct capi_ctr *ctrl)
900{
901 avmcard *card = ((avmctrl_info *)(ctrl->driverdata))->card;
902 avmctrl_info *cinfo;
903 u_int i;
904 unsigned long flags;
905
906 spin_lock_irqsave(&card->lock, flags);
907
908 c4_reset(card);
909
910 spin_unlock_irqrestore(&card->lock, flags);
911
912 for (i = 0; i < card->nr_controllers; i++) {
913 cinfo = &card->ctrlinfo[i];
914 memset(cinfo->version, 0, sizeof(cinfo->version));
915 capi_ctr_down(&cinfo->capi_ctrl);
916 }
917 card->nlogcontr = 0;
918}
919
920static void c4_remove(struct pci_dev *pdev)
921{
922 avmcard *card = pci_get_drvdata(pdev);
923 avmctrl_info *cinfo;
924 u_int i;
925
926 if (!card)
927 return;
928
929 c4_reset(card);
930
931 for (i = 0; i < card->nr_controllers; i++) {
932 cinfo = &card->ctrlinfo[i];
933 detach_capi_ctr(&cinfo->capi_ctrl);
934 }
935
936 free_irq(card->irq, card);
937 iounmap(card->mbase);
938 release_region(card->port, AVMB1_PORTLEN);
939 avmcard_dma_free(card->dma);
940 pci_set_drvdata(pdev, NULL);
941 b1_free_card(card);
942}
943
944
945
946
947static void c4_register_appl(struct capi_ctr *ctrl,
948 u16 appl,
949 capi_register_params *rp)
950{
951 avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
952 avmcard *card = cinfo->card;
953 struct sk_buff *skb;
954 int want = rp->level3cnt;
955 unsigned long flags;
956 int nconn;
957 void *p;
958
959 if (ctrl->cnr == card->cardnr) {
960
961 if (want > 0) nconn = want;
962 else nconn = ctrl->profile.nbchannel * 4 * -want;
963 if (nconn == 0) nconn = ctrl->profile.nbchannel * 4;
964
965 skb = alloc_skb(23, GFP_ATOMIC);
966 if (!skb) {
967 printk(KERN_CRIT "%s: no memory, lost register appl.\n",
968 card->name);
969 return;
970 }
971 p = skb->data;
972 _put_byte(&p, 0);
973 _put_byte(&p, 0);
974 _put_byte(&p, SEND_REGISTER);
975 _put_word(&p, appl);
976 _put_word(&p, 1024 * (nconn + 1));
977 _put_word(&p, nconn);
978 _put_word(&p, rp->datablkcnt);
979 _put_word(&p, rp->datablklen);
980 skb_put(skb, (u8 *)p - (u8 *)skb->data);
981
982 skb_queue_tail(&card->dma->send_queue, skb);
983
984 spin_lock_irqsave(&card->lock, flags);
985 c4_dispatch_tx(card);
986 spin_unlock_irqrestore(&card->lock, flags);
987 }
988}
989
990
991
992static void c4_release_appl(struct capi_ctr *ctrl, u16 appl)
993{
994 avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
995 avmcard *card = cinfo->card;
996 unsigned long flags;
997 struct sk_buff *skb;
998 void *p;
999
1000 spin_lock_irqsave(&card->lock, flags);
1001 capilib_release_appl(&cinfo->ncci_head, appl);
1002 spin_unlock_irqrestore(&card->lock, flags);
1003
1004 if (ctrl->cnr == card->cardnr) {
1005 skb = alloc_skb(7, GFP_ATOMIC);
1006 if (!skb) {
1007 printk(KERN_CRIT "%s: no memory, lost release appl.\n",
1008 card->name);
1009 return;
1010 }
1011 p = skb->data;
1012 _put_byte(&p, 0);
1013 _put_byte(&p, 0);
1014 _put_byte(&p, SEND_RELEASE);
1015 _put_word(&p, appl);
1016
1017 skb_put(skb, (u8 *)p - (u8 *)skb->data);
1018 skb_queue_tail(&card->dma->send_queue, skb);
1019 spin_lock_irqsave(&card->lock, flags);
1020 c4_dispatch_tx(card);
1021 spin_unlock_irqrestore(&card->lock, flags);
1022 }
1023}
1024
1025
1026
1027
1028static u16 c4_send_message(struct capi_ctr *ctrl, struct sk_buff *skb)
1029{
1030 avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
1031 avmcard *card = cinfo->card;
1032 u16 retval = CAPI_NOERROR;
1033 unsigned long flags;
1034
1035 spin_lock_irqsave(&card->lock, flags);
1036 if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) {
1037 retval = capilib_data_b3_req(&cinfo->ncci_head,
1038 CAPIMSG_APPID(skb->data),
1039 CAPIMSG_NCCI(skb->data),
1040 CAPIMSG_MSGID(skb->data));
1041 }
1042 if (retval == CAPI_NOERROR) {
1043 skb_queue_tail(&card->dma->send_queue, skb);
1044 c4_dispatch_tx(card);
1045 }
1046 spin_unlock_irqrestore(&card->lock, flags);
1047 return retval;
1048}
1049
1050
1051
1052static char *c4_procinfo(struct capi_ctr *ctrl)
1053{
1054 avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
1055
1056 if (!cinfo)
1057 return "";
1058 sprintf(cinfo->infobuf, "%s %s 0x%x %d 0x%lx",
1059 cinfo->cardname[0] ? cinfo->cardname : "-",
1060 cinfo->version[VER_DRIVER] ? cinfo->version[VER_DRIVER] : "-",
1061 cinfo->card ? cinfo->card->port : 0x0,
1062 cinfo->card ? cinfo->card->irq : 0,
1063 cinfo->card ? cinfo->card->membase : 0
1064 );
1065 return cinfo->infobuf;
1066}
1067
1068static int c4_proc_show(struct seq_file *m, void *v)
1069{
1070 struct capi_ctr *ctrl = m->private;
1071 avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
1072 avmcard *card = cinfo->card;
1073 u8 flag;
1074 char *s;
1075
1076 seq_printf(m, "%-16s %s\n", "name", card->name);
1077 seq_printf(m, "%-16s 0x%x\n", "io", card->port);
1078 seq_printf(m, "%-16s %d\n", "irq", card->irq);
1079 seq_printf(m, "%-16s 0x%lx\n", "membase", card->membase);
1080 switch (card->cardtype) {
1081 case avm_b1isa: s = "B1 ISA"; break;
1082 case avm_b1pci: s = "B1 PCI"; break;
1083 case avm_b1pcmcia: s = "B1 PCMCIA"; break;
1084 case avm_m1: s = "M1"; break;
1085 case avm_m2: s = "M2"; break;
1086 case avm_t1isa: s = "T1 ISA (HEMA)"; break;
1087 case avm_t1pci: s = "T1 PCI"; break;
1088 case avm_c4: s = "C4"; break;
1089 case avm_c2: s = "C2"; break;
1090 default: s = "???"; break;
1091 }
1092 seq_printf(m, "%-16s %s\n", "type", s);
1093 if ((s = cinfo->version[VER_DRIVER]) != NULL)
1094 seq_printf(m, "%-16s %s\n", "ver_driver", s);
1095 if ((s = cinfo->version[VER_CARDTYPE]) != NULL)
1096 seq_printf(m, "%-16s %s\n", "ver_cardtype", s);
1097 if ((s = cinfo->version[VER_SERIAL]) != NULL)
1098 seq_printf(m, "%-16s %s\n", "ver_serial", s);
1099
1100 if (card->cardtype != avm_m1) {
1101 flag = ((u8 *)(ctrl->profile.manu))[3];
1102 if (flag)
1103 seq_printf(m, "%-16s%s%s%s%s%s%s%s\n",
1104 "protocol",
1105 (flag & 0x01) ? " DSS1" : "",
1106 (flag & 0x02) ? " CT1" : "",
1107 (flag & 0x04) ? " VN3" : "",
1108 (flag & 0x08) ? " NI1" : "",
1109 (flag & 0x10) ? " AUSTEL" : "",
1110 (flag & 0x20) ? " ESS" : "",
1111 (flag & 0x40) ? " 1TR6" : ""
1112 );
1113 }
1114 if (card->cardtype != avm_m1) {
1115 flag = ((u8 *)(ctrl->profile.manu))[5];
1116 if (flag)
1117 seq_printf(m, "%-16s%s%s%s%s\n",
1118 "linetype",
1119 (flag & 0x01) ? " point to point" : "",
1120 (flag & 0x02) ? " point to multipoint" : "",
1121 (flag & 0x08) ? " leased line without D-channel" : "",
1122 (flag & 0x04) ? " leased line with D-channel" : ""
1123 );
1124 }
1125 seq_printf(m, "%-16s %s\n", "cardname", cinfo->cardname);
1126
1127 return 0;
1128}
1129
1130static int c4_proc_open(struct inode *inode, struct file *file)
1131{
1132 return single_open(file, c4_proc_show, PDE_DATA(inode));
1133}
1134
1135static const struct file_operations c4_proc_fops = {
1136 .owner = THIS_MODULE,
1137 .open = c4_proc_open,
1138 .read = seq_read,
1139 .llseek = seq_lseek,
1140 .release = single_release,
1141};
1142
1143
1144
1145static int c4_add_card(struct capicardparams *p, struct pci_dev *dev,
1146 int nr_controllers)
1147{
1148 avmcard *card;
1149 avmctrl_info *cinfo;
1150 int retval;
1151 int i;
1152
1153 card = b1_alloc_card(nr_controllers);
1154 if (!card) {
1155 printk(KERN_WARNING "c4: no memory.\n");
1156 retval = -ENOMEM;
1157 goto err;
1158 }
1159 card->dma = avmcard_dma_alloc("c4", dev, 2048 + 128, 2048 + 128);
1160 if (!card->dma) {
1161 printk(KERN_WARNING "c4: no memory.\n");
1162 retval = -ENOMEM;
1163 goto err_free;
1164 }
1165
1166 sprintf(card->name, "c%d-%x", nr_controllers, p->port);
1167 card->port = p->port;
1168 card->irq = p->irq;
1169 card->membase = p->membase;
1170 card->cardtype = (nr_controllers == 4) ? avm_c4 : avm_c2;
1171
1172 if (!request_region(card->port, AVMB1_PORTLEN, card->name)) {
1173 printk(KERN_WARNING "c4: ports 0x%03x-0x%03x in use.\n",
1174 card->port, card->port + AVMB1_PORTLEN);
1175 retval = -EBUSY;
1176 goto err_free_dma;
1177 }
1178
1179 card->mbase = ioremap(card->membase, 128);
1180 if (card->mbase == NULL) {
1181 printk(KERN_NOTICE "c4: can't remap memory at 0x%lx\n",
1182 card->membase);
1183 retval = -EIO;
1184 goto err_release_region;
1185 }
1186
1187 retval = c4_detect(card);
1188 if (retval != 0) {
1189 printk(KERN_NOTICE "c4: NO card at 0x%x error(%d)\n",
1190 card->port, retval);
1191 retval = -EIO;
1192 goto err_unmap;
1193 }
1194 c4_reset(card);
1195
1196 retval = request_irq(card->irq, c4_interrupt, IRQF_SHARED, card->name, card);
1197 if (retval) {
1198 printk(KERN_ERR "c4: unable to get IRQ %d.\n", card->irq);
1199 retval = -EBUSY;
1200 goto err_unmap;
1201 }
1202
1203 for (i = 0; i < nr_controllers; i++) {
1204 cinfo = &card->ctrlinfo[i];
1205 cinfo->capi_ctrl.owner = THIS_MODULE;
1206 cinfo->capi_ctrl.driver_name = "c4";
1207 cinfo->capi_ctrl.driverdata = cinfo;
1208 cinfo->capi_ctrl.register_appl = c4_register_appl;
1209 cinfo->capi_ctrl.release_appl = c4_release_appl;
1210 cinfo->capi_ctrl.send_message = c4_send_message;
1211 cinfo->capi_ctrl.load_firmware = c4_load_firmware;
1212 cinfo->capi_ctrl.reset_ctr = c4_reset_ctr;
1213 cinfo->capi_ctrl.procinfo = c4_procinfo;
1214 cinfo->capi_ctrl.proc_fops = &c4_proc_fops;
1215 strcpy(cinfo->capi_ctrl.name, card->name);
1216
1217 retval = attach_capi_ctr(&cinfo->capi_ctrl);
1218 if (retval) {
1219 printk(KERN_ERR "c4: attach controller failed (%d).\n", i);
1220 for (i--; i >= 0; i--) {
1221 cinfo = &card->ctrlinfo[i];
1222 detach_capi_ctr(&cinfo->capi_ctrl);
1223 }
1224 goto err_free_irq;
1225 }
1226 if (i == 0)
1227 card->cardnr = cinfo->capi_ctrl.cnr;
1228 }
1229
1230 printk(KERN_INFO "c4: AVM C%d at i/o %#x, irq %d, mem %#lx\n",
1231 nr_controllers, card->port, card->irq,
1232 card->membase);
1233 pci_set_drvdata(dev, card);
1234 return 0;
1235
1236err_free_irq:
1237 free_irq(card->irq, card);
1238err_unmap:
1239 iounmap(card->mbase);
1240err_release_region:
1241 release_region(card->port, AVMB1_PORTLEN);
1242err_free_dma:
1243 avmcard_dma_free(card->dma);
1244err_free:
1245 b1_free_card(card);
1246err:
1247 return retval;
1248}
1249
1250
1251
1252static int c4_probe(struct pci_dev *dev, const struct pci_device_id *ent)
1253{
1254 int nr = ent->driver_data;
1255 int retval = 0;
1256 struct capicardparams param;
1257
1258 if (pci_enable_device(dev) < 0) {
1259 printk(KERN_ERR "c4: failed to enable AVM-C%d\n", nr);
1260 return -ENODEV;
1261 }
1262 pci_set_master(dev);
1263
1264 param.port = pci_resource_start(dev, 1);
1265 param.irq = dev->irq;
1266 param.membase = pci_resource_start(dev, 0);
1267
1268 printk(KERN_INFO "c4: PCI BIOS reports AVM-C%d at i/o %#x, irq %d, mem %#x\n",
1269 nr, param.port, param.irq, param.membase);
1270
1271 retval = c4_add_card(¶m, dev, nr);
1272 if (retval != 0) {
1273 printk(KERN_ERR "c4: no AVM-C%d at i/o %#x, irq %d detected, mem %#x\n",
1274 nr, param.port, param.irq, param.membase);
1275 pci_disable_device(dev);
1276 return -ENODEV;
1277 }
1278 return 0;
1279}
1280
1281static struct pci_driver c4_pci_driver = {
1282 .name = "c4",
1283 .id_table = c4_pci_tbl,
1284 .probe = c4_probe,
1285 .remove = c4_remove,
1286};
1287
1288static struct capi_driver capi_driver_c2 = {
1289 .name = "c2",
1290 .revision = "1.0",
1291};
1292
1293static struct capi_driver capi_driver_c4 = {
1294 .name = "c4",
1295 .revision = "1.0",
1296};
1297
1298static int __init c4_init(void)
1299{
1300 char *p;
1301 char rev[32];
1302 int err;
1303
1304 if ((p = strchr(revision, ':')) != NULL && p[1]) {
1305 strlcpy(rev, p + 2, 32);
1306 if ((p = strchr(rev, '$')) != NULL && p > rev)
1307 *(p - 1) = 0;
1308 } else
1309 strcpy(rev, "1.0");
1310
1311 err = pci_register_driver(&c4_pci_driver);
1312 if (!err) {
1313 strlcpy(capi_driver_c2.revision, rev, 32);
1314 register_capi_driver(&capi_driver_c2);
1315 strlcpy(capi_driver_c4.revision, rev, 32);
1316 register_capi_driver(&capi_driver_c4);
1317 printk(KERN_INFO "c4: revision %s\n", rev);
1318 }
1319 return err;
1320}
1321
1322static void __exit c4_exit(void)
1323{
1324 unregister_capi_driver(&capi_driver_c2);
1325 unregister_capi_driver(&capi_driver_c4);
1326 pci_unregister_driver(&c4_pci_driver);
1327}
1328
1329module_init(c4_init);
1330module_exit(c4_exit);
1331
