1 /* drivers/atm/zatm.c - ZeitNet ZN122x device driver */
2
3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
4
5
6 #include <linux/module.h>
7 #include <linux/kernel.h>
8 #include <linux/mm.h>
9 #include <linux/pci.h>
10 #include <linux/errno.h>
11 #include <linux/atm.h>
12 #include <linux/atmdev.h>
13 #include <linux/sonet.h>
14 #include <linux/skbuff.h>
15 #include <linux/netdevice.h>
16 #include <linux/delay.h>
17 #include <linux/uio.h>
18 #include <linux/init.h>
19 #include <linux/interrupt.h>
20 #include <linux/dma-mapping.h>
21 #include <linux/atm_zatm.h>
22 #include <linux/capability.h>
23 #include <linux/bitops.h>
24 #include <linux/wait.h>
25 #include <linux/slab.h>
26 #include <asm/byteorder.h>
27 #include <asm/system.h>
28 #include <asm/string.h>
29 #include <asm/io.h>
30 #include <linux/atomic.h>
31 #include <asm/uaccess.h>
32
33 #include "uPD98401.h"
34 #include "uPD98402.h"
35 #include "zeprom.h"
36 #include "zatm.h"
37
38
39 /*
40 * TODO:
41 *
42 * Minor features
43 * - support 64 kB SDUs (will have to use multibuffer batches then :-( )
44 * - proper use of CDV, credit = max(1,CDVT*PCR)
45 * - AAL0
46 * - better receive timestamps
47 * - OAM
48 */
49
50 #define ZATM_COPPER 1
51
52 #if 0
53 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
54 #else
55 #define DPRINTK(format,args...)
56 #endif
57
58 #ifndef CONFIG_ATM_ZATM_DEBUG
59
60
61 #define NULLCHECK(x)
62
63 #define EVENT(s,a,b)
64
65
event_dump(void)66 static void event_dump(void)
67 {
68 }
69
70
71 #else
72
73
74 /*
75 * NULL pointer checking
76 */
77
78 #define NULLCHECK(x) \
79 if ((unsigned long) (x) < 0x30) printk(KERN_CRIT #x "==0x%x\n", (int) (x))
80
81 /*
82 * Very extensive activity logging. Greatly improves bug detection speed but
83 * costs a few Mbps if enabled.
84 */
85
86 #define EV 64
87
88 static const char *ev[EV];
89 static unsigned long ev_a[EV],ev_b[EV];
90 static int ec = 0;
91
92
EVENT(const char * s,unsigned long a,unsigned long b)93 static void EVENT(const char *s,unsigned long a,unsigned long b)
94 {
95 ev[ec] = s;
96 ev_a[ec] = a;
97 ev_b[ec] = b;
98 ec = (ec+1) % EV;
99 }
100
101
event_dump(void)102 static void event_dump(void)
103 {
104 int n,i;
105
106 printk(KERN_NOTICE "----- event dump follows -----\n");
107 for (n = 0; n < EV; n++) {
108 i = (ec+n) % EV;
109 printk(KERN_NOTICE);
110 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
111 }
112 printk(KERN_NOTICE "----- event dump ends here -----\n");
113 }
114
115
116 #endif /* CONFIG_ATM_ZATM_DEBUG */
117
118
119 #define RING_BUSY 1 /* indication from do_tx that PDU has to be
120 backlogged */
121
122 static struct atm_dev *zatm_boards = NULL;
123 static unsigned long dummy[2] = {0,0};
124
125
126 #define zin_n(r) inl(zatm_dev->base+r*4)
127 #define zin(r) inl(zatm_dev->base+uPD98401_##r*4)
128 #define zout(v,r) outl(v,zatm_dev->base+uPD98401_##r*4)
129 #define zwait while (zin(CMR) & uPD98401_BUSY)
130
131 /* RX0, RX1, TX0, TX1 */
132 static const int mbx_entries[NR_MBX] = { 1024,1024,1024,1024 };
133 static const int mbx_esize[NR_MBX] = { 16,16,4,4 }; /* entry size in bytes */
134
135 #define MBX_SIZE(i) (mbx_entries[i]*mbx_esize[i])
136
137
138 /*-------------------------------- utilities --------------------------------*/
139
140
zpokel(struct zatm_dev * zatm_dev,u32 value,u32 addr)141 static void zpokel(struct zatm_dev *zatm_dev,u32 value,u32 addr)
142 {
143 zwait;
144 zout(value,CER);
145 zout(uPD98401_IND_ACC | uPD98401_IA_BALL |
146 (uPD98401_IA_TGT_CM << uPD98401_IA_TGT_SHIFT) | addr,CMR);
147 }
148
149
zpeekl(struct zatm_dev * zatm_dev,u32 addr)150 static u32 zpeekl(struct zatm_dev *zatm_dev,u32 addr)
151 {
152 zwait;
153 zout(uPD98401_IND_ACC | uPD98401_IA_BALL | uPD98401_IA_RW |
154 (uPD98401_IA_TGT_CM << uPD98401_IA_TGT_SHIFT) | addr,CMR);
155 zwait;
156 return zin(CER);
157 }
158
159
160 /*------------------------------- free lists --------------------------------*/
161
162
163 /*
164 * Free buffer head structure:
165 * [0] pointer to buffer (for SAR)
166 * [1] buffer descr link pointer (for SAR)
167 * [2] back pointer to skb (for poll_rx)
168 * [3] data
169 * ...
170 */
171
172 struct rx_buffer_head {
173 u32 buffer; /* pointer to buffer (for SAR) */
174 u32 link; /* buffer descriptor link pointer (for SAR) */
175 struct sk_buff *skb; /* back pointer to skb (for poll_rx) */
176 };
177
178
refill_pool(struct atm_dev * dev,int pool)179 static void refill_pool(struct atm_dev *dev,int pool)
180 {
181 struct zatm_dev *zatm_dev;
182 struct sk_buff *skb;
183 struct rx_buffer_head *first;
184 unsigned long flags;
185 int align,offset,free,count,size;
186
187 EVENT("refill_pool\n",0,0);
188 zatm_dev = ZATM_DEV(dev);
189 size = (64 << (pool <= ZATM_AAL5_POOL_BASE ? 0 :
190 pool-ZATM_AAL5_POOL_BASE))+sizeof(struct rx_buffer_head);
191 if (size < PAGE_SIZE) {
192 align = 32; /* for 32 byte alignment */
193 offset = sizeof(struct rx_buffer_head);
194 }
195 else {
196 align = 4096;
197 offset = zatm_dev->pool_info[pool].offset+
198 sizeof(struct rx_buffer_head);
199 }
200 size += align;
201 spin_lock_irqsave(&zatm_dev->lock, flags);
202 free = zpeekl(zatm_dev,zatm_dev->pool_base+2*pool) &
203 uPD98401_RXFP_REMAIN;
204 spin_unlock_irqrestore(&zatm_dev->lock, flags);
205 if (free >= zatm_dev->pool_info[pool].low_water) return;
206 EVENT("starting ... POOL: 0x%x, 0x%x\n",
207 zpeekl(zatm_dev,zatm_dev->pool_base+2*pool),
208 zpeekl(zatm_dev,zatm_dev->pool_base+2*pool+1));
209 EVENT("dummy: 0x%08lx, 0x%08lx\n",dummy[0],dummy[1]);
210 count = 0;
211 first = NULL;
212 while (free < zatm_dev->pool_info[pool].high_water) {
213 struct rx_buffer_head *head;
214
215 skb = alloc_skb(size,GFP_ATOMIC);
216 if (!skb) {
217 printk(KERN_WARNING DEV_LABEL "(Itf %d): got no new "
218 "skb (%d) with %d free\n",dev->number,size,free);
219 break;
220 }
221 skb_reserve(skb,(unsigned char *) ((((unsigned long) skb->data+
222 align+offset-1) & ~(unsigned long) (align-1))-offset)-
223 skb->data);
224 head = (struct rx_buffer_head *) skb->data;
225 skb_reserve(skb,sizeof(struct rx_buffer_head));
226 if (!first) first = head;
227 count++;
228 head->buffer = virt_to_bus(skb->data);
229 head->link = 0;
230 head->skb = skb;
231 EVENT("enq skb 0x%08lx/0x%08lx\n",(unsigned long) skb,
232 (unsigned long) head);
233 spin_lock_irqsave(&zatm_dev->lock, flags);
234 if (zatm_dev->last_free[pool])
235 ((struct rx_buffer_head *) (zatm_dev->last_free[pool]->
236 data))[-1].link = virt_to_bus(head);
237 zatm_dev->last_free[pool] = skb;
238 skb_queue_tail(&zatm_dev->pool[pool],skb);
239 spin_unlock_irqrestore(&zatm_dev->lock, flags);
240 free++;
241 }
242 if (first) {
243 spin_lock_irqsave(&zatm_dev->lock, flags);
244 zwait;
245 zout(virt_to_bus(first),CER);
246 zout(uPD98401_ADD_BAT | (pool << uPD98401_POOL_SHIFT) | count,
247 CMR);
248 spin_unlock_irqrestore(&zatm_dev->lock, flags);
249 EVENT ("POOL: 0x%x, 0x%x\n",
250 zpeekl(zatm_dev,zatm_dev->pool_base+2*pool),
251 zpeekl(zatm_dev,zatm_dev->pool_base+2*pool+1));
252 EVENT("dummy: 0x%08lx, 0x%08lx\n",dummy[0],dummy[1]);
253 }
254 }
255
256
drain_free(struct atm_dev * dev,int pool)257 static void drain_free(struct atm_dev *dev,int pool)
258 {
259 skb_queue_purge(&ZATM_DEV(dev)->pool[pool]);
260 }
261
262
pool_index(int max_pdu)263 static int pool_index(int max_pdu)
264 {
265 int i;
266
267 if (max_pdu % ATM_CELL_PAYLOAD)
268 printk(KERN_ERR DEV_LABEL ": driver error in pool_index: "
269 "max_pdu is %d\n",max_pdu);
270 if (max_pdu > 65536) return -1;
271 for (i = 0; (64 << i) < max_pdu; i++);
272 return i+ZATM_AAL5_POOL_BASE;
273 }
274
275
276 /* use_pool isn't reentrant */
277
278
use_pool(struct atm_dev * dev,int pool)279 static void use_pool(struct atm_dev *dev,int pool)
280 {
281 struct zatm_dev *zatm_dev;
282 unsigned long flags;
283 int size;
284
285 zatm_dev = ZATM_DEV(dev);
286 if (!(zatm_dev->pool_info[pool].ref_count++)) {
287 skb_queue_head_init(&zatm_dev->pool[pool]);
288 size = pool-ZATM_AAL5_POOL_BASE;
289 if (size < 0) size = 0; /* 64B... */
290 else if (size > 10) size = 10; /* ... 64kB */
291 spin_lock_irqsave(&zatm_dev->lock, flags);
292 zpokel(zatm_dev,((zatm_dev->pool_info[pool].low_water/4) <<
293 uPD98401_RXFP_ALERT_SHIFT) |
294 (1 << uPD98401_RXFP_BTSZ_SHIFT) |
295 (size << uPD98401_RXFP_BFSZ_SHIFT),
296 zatm_dev->pool_base+pool*2);
297 zpokel(zatm_dev,(unsigned long) dummy,zatm_dev->pool_base+
298 pool*2+1);
299 spin_unlock_irqrestore(&zatm_dev->lock, flags);
300 zatm_dev->last_free[pool] = NULL;
301 refill_pool(dev,pool);
302 }
303 DPRINTK("pool %d: %d\n",pool,zatm_dev->pool_info[pool].ref_count);
304 }
305
306
unuse_pool(struct atm_dev * dev,int pool)307 static void unuse_pool(struct atm_dev *dev,int pool)
308 {
309 if (!(--ZATM_DEV(dev)->pool_info[pool].ref_count))
310 drain_free(dev,pool);
311 }
312
313 /*----------------------------------- RX ------------------------------------*/
314
315
316 #if 0
317 static void exception(struct atm_vcc *vcc)
318 {
319 static int count = 0;
320 struct zatm_dev *zatm_dev = ZATM_DEV(vcc->dev);
321 struct zatm_vcc *zatm_vcc = ZATM_VCC(vcc);
322 unsigned long *qrp;
323 int i;
324
325 if (count++ > 2) return;
326 for (i = 0; i < 8; i++)
327 printk("TX%d: 0x%08lx\n",i,
328 zpeekl(zatm_dev,zatm_vcc->tx_chan*VC_SIZE/4+i));
329 for (i = 0; i < 5; i++)
330 printk("SH%d: 0x%08lx\n",i,
331 zpeekl(zatm_dev,uPD98401_IM(zatm_vcc->shaper)+16*i));
332 qrp = (unsigned long *) zpeekl(zatm_dev,zatm_vcc->tx_chan*VC_SIZE/4+
333 uPD98401_TXVC_QRP);
334 printk("qrp=0x%08lx\n",(unsigned long) qrp);
335 for (i = 0; i < 4; i++) printk("QRP[%d]: 0x%08lx",i,qrp[i]);
336 }
337 #endif
338
339
340 static const char *err_txt[] = {
341 "No error",
342 "RX buf underflow",
343 "RX FIFO overrun",
344 "Maximum len violation",
345 "CRC error",
346 "User abort",
347 "Length violation",
348 "T1 error",
349 "Deactivated",
350 "???",
351 "???",
352 "???",
353 "???",
354 "???",
355 "???",
356 "???"
357 };
358
359
poll_rx(struct atm_dev * dev,int mbx)360 static void poll_rx(struct atm_dev *dev,int mbx)
361 {
362 struct zatm_dev *zatm_dev;
363 unsigned long pos;
364 u32 x;
365 int error;
366
367 EVENT("poll_rx\n",0,0);
368 zatm_dev = ZATM_DEV(dev);
369 pos = (zatm_dev->mbx_start[mbx] & ~0xffffUL) | zin(MTA(mbx));
370 while (x = zin(MWA(mbx)), (pos & 0xffff) != x) {
371 u32 *here;
372 struct sk_buff *skb;
373 struct atm_vcc *vcc;
374 int cells,size,chan;
375
376 EVENT("MBX: host 0x%lx, nic 0x%x\n",pos,x);
377 here = (u32 *) pos;
378 if (((pos += 16) & 0xffff) == zatm_dev->mbx_end[mbx])
379 pos = zatm_dev->mbx_start[mbx];
380 cells = here[0] & uPD98401_AAL5_SIZE;
381 #if 0
382 printk("RX IND: 0x%x, 0x%x, 0x%x, 0x%x\n",here[0],here[1],here[2],here[3]);
383 {
384 unsigned long *x;
385 printk("POOL: 0x%08x, 0x%08x\n",zpeekl(zatm_dev,
386 zatm_dev->pool_base),
387 zpeekl(zatm_dev,zatm_dev->pool_base+1));
388 x = (unsigned long *) here[2];
389 printk("[0..3] = 0x%08lx, 0x%08lx, 0x%08lx, 0x%08lx\n",
390 x[0],x[1],x[2],x[3]);
391 }
392 #endif
393 error = 0;
394 if (here[3] & uPD98401_AAL5_ERR) {
395 error = (here[3] & uPD98401_AAL5_ES) >>
396 uPD98401_AAL5_ES_SHIFT;
397 if (error == uPD98401_AAL5_ES_DEACT ||
398 error == uPD98401_AAL5_ES_FREE) continue;
399 }
400 EVENT("error code 0x%x/0x%x\n",(here[3] & uPD98401_AAL5_ES) >>
401 uPD98401_AAL5_ES_SHIFT,error);
402 skb = ((struct rx_buffer_head *) bus_to_virt(here[2]))->skb;
403 __net_timestamp(skb);
404 #if 0
405 printk("[-3..0] 0x%08lx 0x%08lx 0x%08lx 0x%08lx\n",((unsigned *) skb->data)[-3],
406 ((unsigned *) skb->data)[-2],((unsigned *) skb->data)[-1],
407 ((unsigned *) skb->data)[0]);
408 #endif
409 EVENT("skb 0x%lx, here 0x%lx\n",(unsigned long) skb,
410 (unsigned long) here);
411 #if 0
412 printk("dummy: 0x%08lx, 0x%08lx\n",dummy[0],dummy[1]);
413 #endif
414 size = error ? 0 : ntohs(((__be16 *) skb->data)[cells*
415 ATM_CELL_PAYLOAD/sizeof(u16)-3]);
416 EVENT("got skb 0x%lx, size %d\n",(unsigned long) skb,size);
417 chan = (here[3] & uPD98401_AAL5_CHAN) >>
418 uPD98401_AAL5_CHAN_SHIFT;
419 if (chan < zatm_dev->chans && zatm_dev->rx_map[chan]) {
420 int pos;
421 vcc = zatm_dev->rx_map[chan];
422 pos = ZATM_VCC(vcc)->pool;
423 if (skb == zatm_dev->last_free[pos])
424 zatm_dev->last_free[pos] = NULL;
425 skb_unlink(skb, zatm_dev->pool + pos);
426 }
427 else {
428 printk(KERN_ERR DEV_LABEL "(itf %d): RX indication "
429 "for non-existing channel\n",dev->number);
430 size = 0;
431 vcc = NULL;
432 event_dump();
433 }
434 if (error) {
435 static unsigned long silence = 0;
436 static int last_error = 0;
437
438 if (error != last_error ||
439 time_after(jiffies, silence) || silence == 0){
440 printk(KERN_WARNING DEV_LABEL "(itf %d): "
441 "chan %d error %s\n",dev->number,chan,
442 err_txt[error]);
443 last_error = error;
444 silence = (jiffies+2*HZ)|1;
445 }
446 size = 0;
447 }
448 if (size && (size > cells*ATM_CELL_PAYLOAD-ATM_AAL5_TRAILER ||
449 size <= (cells-1)*ATM_CELL_PAYLOAD-ATM_AAL5_TRAILER)) {
450 printk(KERN_ERR DEV_LABEL "(itf %d): size %d with %d "
451 "cells\n",dev->number,size,cells);
452 size = 0;
453 event_dump();
454 }
455 if (size > ATM_MAX_AAL5_PDU) {
456 printk(KERN_ERR DEV_LABEL "(itf %d): size too big "
457 "(%d)\n",dev->number,size);
458 size = 0;
459 event_dump();
460 }
461 if (!size) {
462 dev_kfree_skb_irq(skb);
463 if (vcc) atomic_inc(&vcc->stats->rx_err);
464 continue;
465 }
466 if (!atm_charge(vcc,skb->truesize)) {
467 dev_kfree_skb_irq(skb);
468 continue;
469 }
470 skb->len = size;
471 ATM_SKB(skb)->vcc = vcc;
472 vcc->push(vcc,skb);
473 atomic_inc(&vcc->stats->rx);
474 }
475 zout(pos & 0xffff,MTA(mbx));
476 #if 0 /* probably a stupid idea */
477 refill_pool(dev,zatm_vcc->pool);
478 /* maybe this saves us a few interrupts */
479 #endif
480 }
481
482
open_rx_first(struct atm_vcc * vcc)483 static int open_rx_first(struct atm_vcc *vcc)
484 {
485 struct zatm_dev *zatm_dev;
486 struct zatm_vcc *zatm_vcc;
487 unsigned long flags;
488 unsigned short chan;
489 int cells;
490
491 DPRINTK("open_rx_first (0x%x)\n",inb_p(0xc053));
492 zatm_dev = ZATM_DEV(vcc->dev);
493 zatm_vcc = ZATM_VCC(vcc);
494 zatm_vcc->rx_chan = 0;
495 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
496 if (vcc->qos.aal == ATM_AAL5) {
497 if (vcc->qos.rxtp.max_sdu > 65464)
498 vcc->qos.rxtp.max_sdu = 65464;
499 /* fix this - we may want to receive 64kB SDUs
500 later */
501 cells = DIV_ROUND_UP(vcc->qos.rxtp.max_sdu + ATM_AAL5_TRAILER,
502 ATM_CELL_PAYLOAD);
503 zatm_vcc->pool = pool_index(cells*ATM_CELL_PAYLOAD);
504 }
505 else {
506 cells = 1;
507 zatm_vcc->pool = ZATM_AAL0_POOL;
508 }
509 if (zatm_vcc->pool < 0) return -EMSGSIZE;
510 spin_lock_irqsave(&zatm_dev->lock, flags);
511 zwait;
512 zout(uPD98401_OPEN_CHAN,CMR);
513 zwait;
514 DPRINTK("0x%x 0x%x\n",zin(CMR),zin(CER));
515 chan = (zin(CMR) & uPD98401_CHAN_ADDR) >> uPD98401_CHAN_ADDR_SHIFT;
516 spin_unlock_irqrestore(&zatm_dev->lock, flags);
517 DPRINTK("chan is %d\n",chan);
518 if (!chan) return -EAGAIN;
519 use_pool(vcc->dev,zatm_vcc->pool);
520 DPRINTK("pool %d\n",zatm_vcc->pool);
521 /* set up VC descriptor */
522 spin_lock_irqsave(&zatm_dev->lock, flags);
523 zpokel(zatm_dev,zatm_vcc->pool << uPD98401_RXVC_POOL_SHIFT,
524 chan*VC_SIZE/4);
525 zpokel(zatm_dev,uPD98401_RXVC_OD | (vcc->qos.aal == ATM_AAL5 ?
526 uPD98401_RXVC_AR : 0) | cells,chan*VC_SIZE/4+1);
527 zpokel(zatm_dev,0,chan*VC_SIZE/4+2);
528 zatm_vcc->rx_chan = chan;
529 zatm_dev->rx_map[chan] = vcc;
530 spin_unlock_irqrestore(&zatm_dev->lock, flags);
531 return 0;
532 }
533
534
open_rx_second(struct atm_vcc * vcc)535 static int open_rx_second(struct atm_vcc *vcc)
536 {
537 struct zatm_dev *zatm_dev;
538 struct zatm_vcc *zatm_vcc;
539 unsigned long flags;
540 int pos,shift;
541
542 DPRINTK("open_rx_second (0x%x)\n",inb_p(0xc053));
543 zatm_dev = ZATM_DEV(vcc->dev);
544 zatm_vcc = ZATM_VCC(vcc);
545 if (!zatm_vcc->rx_chan) return 0;
546 spin_lock_irqsave(&zatm_dev->lock, flags);
547 /* should also handle VPI @@@ */
548 pos = vcc->vci >> 1;
549 shift = (1-(vcc->vci & 1)) << 4;
550 zpokel(zatm_dev,(zpeekl(zatm_dev,pos) & ~(0xffff << shift)) |
551 ((zatm_vcc->rx_chan | uPD98401_RXLT_ENBL) << shift),pos);
552 spin_unlock_irqrestore(&zatm_dev->lock, flags);
553 return 0;
554 }
555
556
close_rx(struct atm_vcc * vcc)557 static void close_rx(struct atm_vcc *vcc)
558 {
559 struct zatm_dev *zatm_dev;
560 struct zatm_vcc *zatm_vcc;
561 unsigned long flags;
562 int pos,shift;
563
564 zatm_vcc = ZATM_VCC(vcc);
565 zatm_dev = ZATM_DEV(vcc->dev);
566 if (!zatm_vcc->rx_chan) return;
567 DPRINTK("close_rx\n");
568 /* disable receiver */
569 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
570 spin_lock_irqsave(&zatm_dev->lock, flags);
571 pos = vcc->vci >> 1;
572 shift = (1-(vcc->vci & 1)) << 4;
573 zpokel(zatm_dev,zpeekl(zatm_dev,pos) & ~(0xffff << shift),pos);
574 zwait;
575 zout(uPD98401_NOP,CMR);
576 zwait;
577 zout(uPD98401_NOP,CMR);
578 spin_unlock_irqrestore(&zatm_dev->lock, flags);
579 }
580 spin_lock_irqsave(&zatm_dev->lock, flags);
581 zwait;
582 zout(uPD98401_DEACT_CHAN | uPD98401_CHAN_RT | (zatm_vcc->rx_chan <<
583 uPD98401_CHAN_ADDR_SHIFT),CMR);
584 zwait;
585 udelay(10); /* why oh why ... ? */
586 zout(uPD98401_CLOSE_CHAN | uPD98401_CHAN_RT | (zatm_vcc->rx_chan <<
587 uPD98401_CHAN_ADDR_SHIFT),CMR);
588 zwait;
589 if (!(zin(CMR) & uPD98401_CHAN_ADDR))
590 printk(KERN_CRIT DEV_LABEL "(itf %d): can't close RX channel "
591 "%d\n",vcc->dev->number,zatm_vcc->rx_chan);
592 spin_unlock_irqrestore(&zatm_dev->lock, flags);
593 zatm_dev->rx_map[zatm_vcc->rx_chan] = NULL;
594 zatm_vcc->rx_chan = 0;
595 unuse_pool(vcc->dev,zatm_vcc->pool);
596 }
597
598
start_rx(struct atm_dev * dev)599 static int start_rx(struct atm_dev *dev)
600 {
601 struct zatm_dev *zatm_dev;
602 int size,i;
603
604 DPRINTK("start_rx\n");
605 zatm_dev = ZATM_DEV(dev);
606 size = sizeof(struct atm_vcc *)*zatm_dev->chans;
607 zatm_dev->rx_map = kzalloc(size,GFP_KERNEL);
608 if (!zatm_dev->rx_map) return -ENOMEM;
609 /* set VPI/VCI split (use all VCIs and give what's left to VPIs) */
610 zpokel(zatm_dev,(1 << dev->ci_range.vci_bits)-1,uPD98401_VRR);
611 /* prepare free buffer pools */
612 for (i = 0; i <= ZATM_LAST_POOL; i++) {
613 zatm_dev->pool_info[i].ref_count = 0;
614 zatm_dev->pool_info[i].rqa_count = 0;
615 zatm_dev->pool_info[i].rqu_count = 0;
616 zatm_dev->pool_info[i].low_water = LOW_MARK;
617 zatm_dev->pool_info[i].high_water = HIGH_MARK;
618 zatm_dev->pool_info[i].offset = 0;
619 zatm_dev->pool_info[i].next_off = 0;
620 zatm_dev->pool_info[i].next_cnt = 0;
621 zatm_dev->pool_info[i].next_thres = OFF_CNG_THRES;
622 }
623 return 0;
624 }
625
626
627 /*----------------------------------- TX ------------------------------------*/
628
629
do_tx(struct sk_buff * skb)630 static int do_tx(struct sk_buff *skb)
631 {
632 struct atm_vcc *vcc;
633 struct zatm_dev *zatm_dev;
634 struct zatm_vcc *zatm_vcc;
635 u32 *dsc;
636 unsigned long flags;
637
638 EVENT("do_tx\n",0,0);
639 DPRINTK("sending skb %p\n",skb);
640 vcc = ATM_SKB(skb)->vcc;
641 zatm_dev = ZATM_DEV(vcc->dev);
642 zatm_vcc = ZATM_VCC(vcc);
643 EVENT("iovcnt=%d\n",skb_shinfo(skb)->nr_frags,0);
644 spin_lock_irqsave(&zatm_dev->lock, flags);
645 if (!skb_shinfo(skb)->nr_frags) {
646 if (zatm_vcc->txing == RING_ENTRIES-1) {
647 spin_unlock_irqrestore(&zatm_dev->lock, flags);
648 return RING_BUSY;
649 }
650 zatm_vcc->txing++;
651 dsc = zatm_vcc->ring+zatm_vcc->ring_curr;
652 zatm_vcc->ring_curr = (zatm_vcc->ring_curr+RING_WORDS) &
653 (RING_ENTRIES*RING_WORDS-1);
654 dsc[1] = 0;
655 dsc[2] = skb->len;
656 dsc[3] = virt_to_bus(skb->data);
657 mb();
658 dsc[0] = uPD98401_TXPD_V | uPD98401_TXPD_DP | uPD98401_TXPD_SM
659 | (vcc->qos.aal == ATM_AAL5 ? uPD98401_TXPD_AAL5 : 0 |
660 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ?
661 uPD98401_CLPM_1 : uPD98401_CLPM_0));
662 EVENT("dsc (0x%lx)\n",(unsigned long) dsc,0);
663 }
664 else {
665 printk("NONONONOO!!!!\n");
666 dsc = NULL;
667 #if 0
668 u32 *put;
669 int i;
670
671 dsc = kmalloc(uPD98401_TXPD_SIZE * 2 +
672 uPD98401_TXBD_SIZE * ATM_SKB(skb)->iovcnt, GFP_ATOMIC);
673 if (!dsc) {
674 if (vcc->pop)
675 vcc->pop(vcc, skb);
676 else
677 dev_kfree_skb_irq(skb);
678 return -EAGAIN;
679 }
680 /* @@@ should check alignment */
681 put = dsc+8;
682 dsc[0] = uPD98401_TXPD_V | uPD98401_TXPD_DP |
683 (vcc->aal == ATM_AAL5 ? uPD98401_TXPD_AAL5 : 0 |
684 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ?
685 uPD98401_CLPM_1 : uPD98401_CLPM_0));
686 dsc[1] = 0;
687 dsc[2] = ATM_SKB(skb)->iovcnt * uPD98401_TXBD_SIZE;
688 dsc[3] = virt_to_bus(put);
689 for (i = 0; i < ATM_SKB(skb)->iovcnt; i++) {
690 *put++ = ((struct iovec *) skb->data)[i].iov_len;
691 *put++ = virt_to_bus(((struct iovec *)
692 skb->data)[i].iov_base);
693 }
694 put[-2] |= uPD98401_TXBD_LAST;
695 #endif
696 }
697 ZATM_PRV_DSC(skb) = dsc;
698 skb_queue_tail(&zatm_vcc->tx_queue,skb);
699 DPRINTK("QRP=0x%08lx\n",zpeekl(zatm_dev,zatm_vcc->tx_chan*VC_SIZE/4+
700 uPD98401_TXVC_QRP));
701 zwait;
702 zout(uPD98401_TX_READY | (zatm_vcc->tx_chan <<
703 uPD98401_CHAN_ADDR_SHIFT),CMR);
704 spin_unlock_irqrestore(&zatm_dev->lock, flags);
705 EVENT("done\n",0,0);
706 return 0;
707 }
708
709
dequeue_tx(struct atm_vcc * vcc)710 static inline void dequeue_tx(struct atm_vcc *vcc)
711 {
712 struct zatm_vcc *zatm_vcc;
713 struct sk_buff *skb;
714
715 EVENT("dequeue_tx\n",0,0);
716 zatm_vcc = ZATM_VCC(vcc);
717 skb = skb_dequeue(&zatm_vcc->tx_queue);
718 if (!skb) {
719 printk(KERN_CRIT DEV_LABEL "(itf %d): dequeue_tx but not "
720 "txing\n",vcc->dev->number);
721 return;
722 }
723 #if 0 /* @@@ would fail on CLP */
724 if (*ZATM_PRV_DSC(skb) != (uPD98401_TXPD_V | uPD98401_TXPD_DP |
725 uPD98401_TXPD_SM | uPD98401_TXPD_AAL5)) printk("@#*$!!!! (%08x)\n",
726 *ZATM_PRV_DSC(skb));
727 #endif
728 *ZATM_PRV_DSC(skb) = 0; /* mark as invalid */
729 zatm_vcc->txing--;
730 if (vcc->pop) vcc->pop(vcc,skb);
731 else dev_kfree_skb_irq(skb);
732 while ((skb = skb_dequeue(&zatm_vcc->backlog)))
733 if (do_tx(skb) == RING_BUSY) {
734 skb_queue_head(&zatm_vcc->backlog,skb);
735 break;
736 }
737 atomic_inc(&vcc->stats->tx);
738 wake_up(&zatm_vcc->tx_wait);
739 }
740
741
poll_tx(struct atm_dev * dev,int mbx)742 static void poll_tx(struct atm_dev *dev,int mbx)
743 {
744 struct zatm_dev *zatm_dev;
745 unsigned long pos;
746 u32 x;
747
748 EVENT("poll_tx\n",0,0);
749 zatm_dev = ZATM_DEV(dev);
750 pos = (zatm_dev->mbx_start[mbx] & ~0xffffUL) | zin(MTA(mbx));
751 while (x = zin(MWA(mbx)), (pos & 0xffff) != x) {
752 int chan;
753
754 #if 1
755 u32 data,*addr;
756
757 EVENT("MBX: host 0x%lx, nic 0x%x\n",pos,x);
758 addr = (u32 *) pos;
759 data = *addr;
760 chan = (data & uPD98401_TXI_CONN) >> uPD98401_TXI_CONN_SHIFT;
761 EVENT("addr = 0x%lx, data = 0x%08x,",(unsigned long) addr,
762 data);
763 EVENT("chan = %d\n",chan,0);
764 #else
765 NO !
766 chan = (zatm_dev->mbx_start[mbx][pos >> 2] & uPD98401_TXI_CONN)
767 >> uPD98401_TXI_CONN_SHIFT;
768 #endif
769 if (chan < zatm_dev->chans && zatm_dev->tx_map[chan])
770 dequeue_tx(zatm_dev->tx_map[chan]);
771 else {
772 printk(KERN_CRIT DEV_LABEL "(itf %d): TX indication "
773 "for non-existing channel %d\n",dev->number,chan);
774 event_dump();
775 }
776 if (((pos += 4) & 0xffff) == zatm_dev->mbx_end[mbx])
777 pos = zatm_dev->mbx_start[mbx];
778 }
779 zout(pos & 0xffff,MTA(mbx));
780 }
781
782
783 /*
784 * BUG BUG BUG: Doesn't handle "new-style" rate specification yet.
785 */
786
alloc_shaper(struct atm_dev * dev,int * pcr,int min,int max,int ubr)787 static int alloc_shaper(struct atm_dev *dev,int *pcr,int min,int max,int ubr)
788 {
789 struct zatm_dev *zatm_dev;
790 unsigned long flags;
791 unsigned long i,m,c;
792 int shaper;
793
794 DPRINTK("alloc_shaper (min = %d, max = %d)\n",min,max);
795 zatm_dev = ZATM_DEV(dev);
796 if (!zatm_dev->free_shapers) return -EAGAIN;
797 for (shaper = 0; !((zatm_dev->free_shapers >> shaper) & 1); shaper++);
798 zatm_dev->free_shapers &= ~1 << shaper;
799 if (ubr) {
800 c = 5;
801 i = m = 1;
802 zatm_dev->ubr_ref_cnt++;
803 zatm_dev->ubr = shaper;
804 *pcr = 0;
805 }
806 else {
807 if (min) {
808 if (min <= 255) {
809 i = min;
810 m = ATM_OC3_PCR;
811 }
812 else {
813 i = 255;
814 m = ATM_OC3_PCR*255/min;
815 }
816 }
817 else {
818 if (max > zatm_dev->tx_bw) max = zatm_dev->tx_bw;
819 if (max <= 255) {
820 i = max;
821 m = ATM_OC3_PCR;
822 }
823 else {
824 i = 255;
825 m = DIV_ROUND_UP(ATM_OC3_PCR*255, max);
826 }
827 }
828 if (i > m) {
829 printk(KERN_CRIT DEV_LABEL "shaper algorithm botched "
830 "[%d,%d] -> i=%ld,m=%ld\n",min,max,i,m);
831 m = i;
832 }
833 *pcr = i*ATM_OC3_PCR/m;
834 c = 20; /* @@@ should use max_cdv ! */
835 if ((min && *pcr < min) || (max && *pcr > max)) return -EINVAL;
836 if (zatm_dev->tx_bw < *pcr) return -EAGAIN;
837 zatm_dev->tx_bw -= *pcr;
838 }
839 spin_lock_irqsave(&zatm_dev->lock, flags);
840 DPRINTK("i = %d, m = %d, PCR = %d\n",i,m,*pcr);
841 zpokel(zatm_dev,(i << uPD98401_IM_I_SHIFT) | m,uPD98401_IM(shaper));
842 zpokel(zatm_dev,c << uPD98401_PC_C_SHIFT,uPD98401_PC(shaper));
843 zpokel(zatm_dev,0,uPD98401_X(shaper));
844 zpokel(zatm_dev,0,uPD98401_Y(shaper));
845 zpokel(zatm_dev,uPD98401_PS_E,uPD98401_PS(shaper));
846 spin_unlock_irqrestore(&zatm_dev->lock, flags);
847 return shaper;
848 }
849
850
dealloc_shaper(struct atm_dev * dev,int shaper)851 static void dealloc_shaper(struct atm_dev *dev,int shaper)
852 {
853 struct zatm_dev *zatm_dev;
854 unsigned long flags;
855
856 zatm_dev = ZATM_DEV(dev);
857 if (shaper == zatm_dev->ubr) {
858 if (--zatm_dev->ubr_ref_cnt) return;
859 zatm_dev->ubr = -1;
860 }
861 spin_lock_irqsave(&zatm_dev->lock, flags);
862 zpokel(zatm_dev,zpeekl(zatm_dev,uPD98401_PS(shaper)) & ~uPD98401_PS_E,
863 uPD98401_PS(shaper));
864 spin_unlock_irqrestore(&zatm_dev->lock, flags);
865 zatm_dev->free_shapers |= 1 << shaper;
866 }
867
868
close_tx(struct atm_vcc * vcc)869 static void close_tx(struct atm_vcc *vcc)
870 {
871 struct zatm_dev *zatm_dev;
872 struct zatm_vcc *zatm_vcc;
873 unsigned long flags;
874 int chan;
875
876 zatm_vcc = ZATM_VCC(vcc);
877 zatm_dev = ZATM_DEV(vcc->dev);
878 chan = zatm_vcc->tx_chan;
879 if (!chan) return;
880 DPRINTK("close_tx\n");
881 if (skb_peek(&zatm_vcc->backlog)) {
882 printk("waiting for backlog to drain ...\n");
883 event_dump();
884 wait_event(zatm_vcc->tx_wait, !skb_peek(&zatm_vcc->backlog));
885 }
886 if (skb_peek(&zatm_vcc->tx_queue)) {
887 printk("waiting for TX queue to drain ...\n");
888 event_dump();
889 wait_event(zatm_vcc->tx_wait, !skb_peek(&zatm_vcc->tx_queue));
890 }
891 spin_lock_irqsave(&zatm_dev->lock, flags);
892 #if 0
893 zwait;
894 zout(uPD98401_DEACT_CHAN | (chan << uPD98401_CHAN_ADDR_SHIFT),CMR);
895 #endif
896 zwait;
897 zout(uPD98401_CLOSE_CHAN | (chan << uPD98401_CHAN_ADDR_SHIFT),CMR);
898 zwait;
899 if (!(zin(CMR) & uPD98401_CHAN_ADDR))
900 printk(KERN_CRIT DEV_LABEL "(itf %d): can't close TX channel "
901 "%d\n",vcc->dev->number,chan);
902 spin_unlock_irqrestore(&zatm_dev->lock, flags);
903 zatm_vcc->tx_chan = 0;
904 zatm_dev->tx_map[chan] = NULL;
905 if (zatm_vcc->shaper != zatm_dev->ubr) {
906 zatm_dev->tx_bw += vcc->qos.txtp.min_pcr;
907 dealloc_shaper(vcc->dev,zatm_vcc->shaper);
908 }
909 kfree(zatm_vcc->ring);
910 }
911
912
open_tx_first(struct atm_vcc * vcc)913 static int open_tx_first(struct atm_vcc *vcc)
914 {
915 struct zatm_dev *zatm_dev;
916 struct zatm_vcc *zatm_vcc;
917 unsigned long flags;
918 u32 *loop;
919 unsigned short chan;
920 int unlimited;
921
922 DPRINTK("open_tx_first\n");
923 zatm_dev = ZATM_DEV(vcc->dev);
924 zatm_vcc = ZATM_VCC(vcc);
925 zatm_vcc->tx_chan = 0;
926 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
927 spin_lock_irqsave(&zatm_dev->lock, flags);
928 zwait;
929 zout(uPD98401_OPEN_CHAN,CMR);
930 zwait;
931 DPRINTK("0x%x 0x%x\n",zin(CMR),zin(CER));
932 chan = (zin(CMR) & uPD98401_CHAN_ADDR) >> uPD98401_CHAN_ADDR_SHIFT;
933 spin_unlock_irqrestore(&zatm_dev->lock, flags);
934 DPRINTK("chan is %d\n",chan);
935 if (!chan) return -EAGAIN;
936 unlimited = vcc->qos.txtp.traffic_class == ATM_UBR &&
937 (!vcc->qos.txtp.max_pcr || vcc->qos.txtp.max_pcr == ATM_MAX_PCR ||
938 vcc->qos.txtp.max_pcr >= ATM_OC3_PCR);
939 if (unlimited && zatm_dev->ubr != -1) zatm_vcc->shaper = zatm_dev->ubr;
940 else {
941 int uninitialized_var(pcr);
942
943 if (unlimited) vcc->qos.txtp.max_sdu = ATM_MAX_AAL5_PDU;
944 if ((zatm_vcc->shaper = alloc_shaper(vcc->dev,&pcr,
945 vcc->qos.txtp.min_pcr,vcc->qos.txtp.max_pcr,unlimited))
946 < 0) {
947 close_tx(vcc);
948 return zatm_vcc->shaper;
949 }
950 if (pcr > ATM_OC3_PCR) pcr = ATM_OC3_PCR;
951 vcc->qos.txtp.min_pcr = vcc->qos.txtp.max_pcr = pcr;
952 }
953 zatm_vcc->tx_chan = chan;
954 skb_queue_head_init(&zatm_vcc->tx_queue);
955 init_waitqueue_head(&zatm_vcc->tx_wait);
956 /* initialize ring */
957 zatm_vcc->ring = kzalloc(RING_SIZE,GFP_KERNEL);
958 if (!zatm_vcc->ring) return -ENOMEM;
959 loop = zatm_vcc->ring+RING_ENTRIES*RING_WORDS;
960 loop[0] = uPD98401_TXPD_V;
961 loop[1] = loop[2] = 0;
962 loop[3] = virt_to_bus(zatm_vcc->ring);
963 zatm_vcc->ring_curr = 0;
964 zatm_vcc->txing = 0;
965 skb_queue_head_init(&zatm_vcc->backlog);
966 zpokel(zatm_dev,virt_to_bus(zatm_vcc->ring),
967 chan*VC_SIZE/4+uPD98401_TXVC_QRP);
968 return 0;
969 }
970
971
open_tx_second(struct atm_vcc * vcc)972 static int open_tx_second(struct atm_vcc *vcc)
973 {
974 struct zatm_dev *zatm_dev;
975 struct zatm_vcc *zatm_vcc;
976 unsigned long flags;
977
978 DPRINTK("open_tx_second\n");
979 zatm_dev = ZATM_DEV(vcc->dev);
980 zatm_vcc = ZATM_VCC(vcc);
981 if (!zatm_vcc->tx_chan) return 0;
982 /* set up VC descriptor */
983 spin_lock_irqsave(&zatm_dev->lock, flags);
984 zpokel(zatm_dev,0,zatm_vcc->tx_chan*VC_SIZE/4);
985 zpokel(zatm_dev,uPD98401_TXVC_L | (zatm_vcc->shaper <<
986 uPD98401_TXVC_SHP_SHIFT) | (vcc->vpi << uPD98401_TXVC_VPI_SHIFT) |
987 vcc->vci,zatm_vcc->tx_chan*VC_SIZE/4+1);
988 zpokel(zatm_dev,0,zatm_vcc->tx_chan*VC_SIZE/4+2);
989 spin_unlock_irqrestore(&zatm_dev->lock, flags);
990 zatm_dev->tx_map[zatm_vcc->tx_chan] = vcc;
991 return 0;
992 }
993
994
start_tx(struct atm_dev * dev)995 static int start_tx(struct atm_dev *dev)
996 {
997 struct zatm_dev *zatm_dev;
998 int i;
999
1000 DPRINTK("start_tx\n");
1001 zatm_dev = ZATM_DEV(dev);
1002 zatm_dev->tx_map = kmalloc(sizeof(struct atm_vcc *)*
1003 zatm_dev->chans,GFP_KERNEL);
1004 if (!zatm_dev->tx_map) return -ENOMEM;
1005 zatm_dev->tx_bw = ATM_OC3_PCR;
1006 zatm_dev->free_shapers = (1 << NR_SHAPERS)-1;
1007 zatm_dev->ubr = -1;
1008 zatm_dev->ubr_ref_cnt = 0;
1009 /* initialize shapers */
1010 for (i = 0; i < NR_SHAPERS; i++) zpokel(zatm_dev,0,uPD98401_PS(i));
1011 return 0;
1012 }
1013
1014
1015 /*------------------------------- interrupts --------------------------------*/
1016
1017
zatm_int(int irq,void * dev_id)1018 static irqreturn_t zatm_int(int irq,void *dev_id)
1019 {
1020 struct atm_dev *dev;
1021 struct zatm_dev *zatm_dev;
1022 u32 reason;
1023 int handled = 0;
1024
1025 dev = dev_id;
1026 zatm_dev = ZATM_DEV(dev);
1027 while ((reason = zin(GSR))) {
1028 handled = 1;
1029 EVENT("reason 0x%x\n",reason,0);
1030 if (reason & uPD98401_INT_PI) {
1031 EVENT("PHY int\n",0,0);
1032 dev->phy->interrupt(dev);
1033 }
1034 if (reason & uPD98401_INT_RQA) {
1035 unsigned long pools;
1036 int i;
1037
1038 pools = zin(RQA);
1039 EVENT("RQA (0x%08x)\n",pools,0);
1040 for (i = 0; pools; i++) {
1041 if (pools & 1) {
1042 refill_pool(dev,i);
1043 zatm_dev->pool_info[i].rqa_count++;
1044 }
1045 pools >>= 1;
1046 }
1047 }
1048 if (reason & uPD98401_INT_RQU) {
1049 unsigned long pools;
1050 int i;
1051 pools = zin(RQU);
1052 printk(KERN_WARNING DEV_LABEL "(itf %d): RQU 0x%08lx\n",
1053 dev->number,pools);
1054 event_dump();
1055 for (i = 0; pools; i++) {
1056 if (pools & 1) {
1057 refill_pool(dev,i);
1058 zatm_dev->pool_info[i].rqu_count++;
1059 }
1060 pools >>= 1;
1061 }
1062 }
1063 /* don't handle RD */
1064 if (reason & uPD98401_INT_SPE)
1065 printk(KERN_ALERT DEV_LABEL "(itf %d): system parity "
1066 "error at 0x%08x\n",dev->number,zin(ADDR));
1067 if (reason & uPD98401_INT_CPE)
1068 printk(KERN_ALERT DEV_LABEL "(itf %d): control memory "
1069 "parity error at 0x%08x\n",dev->number,zin(ADDR));
1070 if (reason & uPD98401_INT_SBE) {
1071 printk(KERN_ALERT DEV_LABEL "(itf %d): system bus "
1072 "error at 0x%08x\n",dev->number,zin(ADDR));
1073 event_dump();
1074 }
1075 /* don't handle IND */
1076 if (reason & uPD98401_INT_MF) {
1077 printk(KERN_CRIT DEV_LABEL "(itf %d): mailbox full "
1078 "(0x%x)\n",dev->number,(reason & uPD98401_INT_MF)
1079 >> uPD98401_INT_MF_SHIFT);
1080 event_dump();
1081 /* @@@ should try to recover */
1082 }
1083 if (reason & uPD98401_INT_MM) {
1084 if (reason & 1) poll_rx(dev,0);
1085 if (reason & 2) poll_rx(dev,1);
1086 if (reason & 4) poll_tx(dev,2);
1087 if (reason & 8) poll_tx(dev,3);
1088 }
1089 /* @@@ handle RCRn */
1090 }
1091 return IRQ_RETVAL(handled);
1092 }
1093
1094
1095 /*----------------------------- (E)EPROM access -----------------------------*/
1096
1097
eprom_set(struct zatm_dev * zatm_dev,unsigned long value,unsigned short cmd)1098 static void __devinit eprom_set(struct zatm_dev *zatm_dev,unsigned long value,
1099 unsigned short cmd)
1100 {
1101 int error;
1102
1103 if ((error = pci_write_config_dword(zatm_dev->pci_dev,cmd,value)))
1104 printk(KERN_ERR DEV_LABEL ": PCI write failed (0x%02x)\n",
1105 error);
1106 }
1107
1108
eprom_get(struct zatm_dev * zatm_dev,unsigned short cmd)1109 static unsigned long __devinit eprom_get(struct zatm_dev *zatm_dev,
1110 unsigned short cmd)
1111 {
1112 unsigned int value;
1113 int error;
1114
1115 if ((error = pci_read_config_dword(zatm_dev->pci_dev,cmd,&value)))
1116 printk(KERN_ERR DEV_LABEL ": PCI read failed (0x%02x)\n",
1117 error);
1118 return value;
1119 }
1120
1121
eprom_put_bits(struct zatm_dev * zatm_dev,unsigned long data,int bits,unsigned short cmd)1122 static void __devinit eprom_put_bits(struct zatm_dev *zatm_dev,
1123 unsigned long data,int bits,unsigned short cmd)
1124 {
1125 unsigned long value;
1126 int i;
1127
1128 for (i = bits-1; i >= 0; i--) {
1129 value = ZEPROM_CS | (((data >> i) & 1) ? ZEPROM_DI : 0);
1130 eprom_set(zatm_dev,value,cmd);
1131 eprom_set(zatm_dev,value | ZEPROM_SK,cmd);
1132 eprom_set(zatm_dev,value,cmd);
1133 }
1134 }
1135
1136
eprom_get_byte(struct zatm_dev * zatm_dev,unsigned char * byte,unsigned short cmd)1137 static void __devinit eprom_get_byte(struct zatm_dev *zatm_dev,
1138 unsigned char *byte,unsigned short cmd)
1139 {
1140 int i;
1141
1142 *byte = 0;
1143 for (i = 8; i; i--) {
1144 eprom_set(zatm_dev,ZEPROM_CS,cmd);
1145 eprom_set(zatm_dev,ZEPROM_CS | ZEPROM_SK,cmd);
1146 *byte <<= 1;
1147 if (eprom_get(zatm_dev,cmd) & ZEPROM_DO) *byte |= 1;
1148 eprom_set(zatm_dev,ZEPROM_CS,cmd);
1149 }
1150 }
1151
1152
eprom_try_esi(struct atm_dev * dev,unsigned short cmd,int offset,int swap)1153 static unsigned char __devinit eprom_try_esi(struct atm_dev *dev,
1154 unsigned short cmd,int offset,int swap)
1155 {
1156 unsigned char buf[ZEPROM_SIZE];
1157 struct zatm_dev *zatm_dev;
1158 int i;
1159
1160 zatm_dev = ZATM_DEV(dev);
1161 for (i = 0; i < ZEPROM_SIZE; i += 2) {
1162 eprom_set(zatm_dev,ZEPROM_CS,cmd); /* select EPROM */
1163 eprom_put_bits(zatm_dev,ZEPROM_CMD_READ,ZEPROM_CMD_LEN,cmd);
1164 eprom_put_bits(zatm_dev,i >> 1,ZEPROM_ADDR_LEN,cmd);
1165 eprom_get_byte(zatm_dev,buf+i+swap,cmd);
1166 eprom_get_byte(zatm_dev,buf+i+1-swap,cmd);
1167 eprom_set(zatm_dev,0,cmd); /* deselect EPROM */
1168 }
1169 memcpy(dev->esi,buf+offset,ESI_LEN);
1170 return memcmp(dev->esi,"\0\0\0\0\0",ESI_LEN); /* assumes ESI_LEN == 6 */
1171 }
1172
1173
eprom_get_esi(struct atm_dev * dev)1174 static void __devinit eprom_get_esi(struct atm_dev *dev)
1175 {
1176 if (eprom_try_esi(dev,ZEPROM_V1_REG,ZEPROM_V1_ESI_OFF,1)) return;
1177 (void) eprom_try_esi(dev,ZEPROM_V2_REG,ZEPROM_V2_ESI_OFF,0);
1178 }
1179
1180
1181 /*--------------------------------- entries ---------------------------------*/
1182
1183
zatm_init(struct atm_dev * dev)1184 static int __devinit zatm_init(struct atm_dev *dev)
1185 {
1186 struct zatm_dev *zatm_dev;
1187 struct pci_dev *pci_dev;
1188 unsigned short command;
1189 int error,i,last;
1190 unsigned long t0,t1,t2;
1191
1192 DPRINTK(">zatm_init\n");
1193 zatm_dev = ZATM_DEV(dev);
1194 spin_lock_init(&zatm_dev->lock);
1195 pci_dev = zatm_dev->pci_dev;
1196 zatm_dev->base = pci_resource_start(pci_dev, 0);
1197 zatm_dev->irq = pci_dev->irq;
1198 if ((error = pci_read_config_word(pci_dev,PCI_COMMAND,&command))) {
1199 printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%02x\n",
1200 dev->number,error);
1201 return -EINVAL;
1202 }
1203 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1204 command | PCI_COMMAND_IO | PCI_COMMAND_MASTER))) {
1205 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable IO (0x%02x)"
1206 "\n",dev->number,error);
1207 return -EIO;
1208 }
1209 eprom_get_esi(dev);
1210 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%x,irq=%d,",
1211 dev->number,pci_dev->revision,zatm_dev->base,zatm_dev->irq);
1212 /* reset uPD98401 */
1213 zout(0,SWR);
1214 while (!(zin(GSR) & uPD98401_INT_IND));
1215 zout(uPD98401_GMR_ONE /*uPD98401_BURST4*/,GMR);
1216 last = MAX_CRAM_SIZE;
1217 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1218 zpokel(zatm_dev,0x55555555,i);
1219 if (zpeekl(zatm_dev,i) != 0x55555555) last = i;
1220 else {
1221 zpokel(zatm_dev,0xAAAAAAAA,i);
1222 if (zpeekl(zatm_dev,i) != 0xAAAAAAAA) last = i;
1223 else zpokel(zatm_dev,i,i);
1224 }
1225 }
1226 for (i = 0; i < last; i += RAM_INCREMENT)
1227 if (zpeekl(zatm_dev,i) != i) break;
1228 zatm_dev->mem = i << 2;
1229 while (i) zpokel(zatm_dev,0,--i);
1230 /* reset again to rebuild memory pointers */
1231 zout(0,SWR);
1232 while (!(zin(GSR) & uPD98401_INT_IND));
1233 zout(uPD98401_GMR_ONE | uPD98401_BURST8 | uPD98401_BURST4 |
1234 uPD98401_BURST2 | uPD98401_GMR_PM | uPD98401_GMR_DR,GMR);
1235 /* TODO: should shrink allocation now */
1236 printk("mem=%dkB,%s (",zatm_dev->mem >> 10,zatm_dev->copper ? "UTP" :
1237 "MMF");
1238 for (i = 0; i < ESI_LEN; i++)
1239 printk("%02X%s",dev->esi[i],i == ESI_LEN-1 ? ")\n" : "-");
1240 do {
1241 unsigned long flags;
1242
1243 spin_lock_irqsave(&zatm_dev->lock, flags);
1244 t0 = zpeekl(zatm_dev,uPD98401_TSR);
1245 udelay(10);
1246 t1 = zpeekl(zatm_dev,uPD98401_TSR);
1247 udelay(1010);
1248 t2 = zpeekl(zatm_dev,uPD98401_TSR);
1249 spin_unlock_irqrestore(&zatm_dev->lock, flags);
1250 }
1251 while (t0 > t1 || t1 > t2); /* loop if wrapping ... */
1252 zatm_dev->khz = t2-2*t1+t0;
1253 printk(KERN_NOTICE DEV_LABEL "(itf %d): uPD98401 %d.%d at %d.%03d "
1254 "MHz\n",dev->number,
1255 (zin(VER) & uPD98401_MAJOR) >> uPD98401_MAJOR_SHIFT,
1256 zin(VER) & uPD98401_MINOR,zatm_dev->khz/1000,zatm_dev->khz % 1000);
1257 return uPD98402_init(dev);
1258 }
1259
1260
zatm_start(struct atm_dev * dev)1261 static int __devinit zatm_start(struct atm_dev *dev)
1262 {
1263 struct zatm_dev *zatm_dev = ZATM_DEV(dev);
1264 struct pci_dev *pdev = zatm_dev->pci_dev;
1265 unsigned long curr;
1266 int pools,vccs,rx;
1267 int error, i, ld;
1268
1269 DPRINTK("zatm_start\n");
1270 zatm_dev->rx_map = zatm_dev->tx_map = NULL;
1271 for (i = 0; i < NR_MBX; i++)
1272 zatm_dev->mbx_start[i] = 0;
1273 error = request_irq(zatm_dev->irq, zatm_int, IRQF_SHARED, DEV_LABEL, dev);
1274 if (error < 0) {
1275 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1276 dev->number,zatm_dev->irq);
1277 goto done;
1278 }
1279 /* define memory regions */
1280 pools = NR_POOLS;
1281 if (NR_SHAPERS*SHAPER_SIZE > pools*POOL_SIZE)
1282 pools = NR_SHAPERS*SHAPER_SIZE/POOL_SIZE;
1283 vccs = (zatm_dev->mem-NR_SHAPERS*SHAPER_SIZE-pools*POOL_SIZE)/
1284 (2*VC_SIZE+RX_SIZE);
1285 ld = -1;
1286 for (rx = 1; rx < vccs; rx <<= 1) ld++;
1287 dev->ci_range.vpi_bits = 0; /* @@@ no VPI for now */
1288 dev->ci_range.vci_bits = ld;
1289 dev->link_rate = ATM_OC3_PCR;
1290 zatm_dev->chans = vccs; /* ??? */
1291 curr = rx*RX_SIZE/4;
1292 DPRINTK("RX pool 0x%08lx\n",curr);
1293 zpokel(zatm_dev,curr,uPD98401_PMA); /* receive pool */
1294 zatm_dev->pool_base = curr;
1295 curr += pools*POOL_SIZE/4;
1296 DPRINTK("Shapers 0x%08lx\n",curr);
1297 zpokel(zatm_dev,curr,uPD98401_SMA); /* shapers */
1298 curr += NR_SHAPERS*SHAPER_SIZE/4;
1299 DPRINTK("Free 0x%08lx\n",curr);
1300 zpokel(zatm_dev,curr,uPD98401_TOS); /* free pool */
1301 printk(KERN_INFO DEV_LABEL "(itf %d): %d shapers, %d pools, %d RX, "
1302 "%ld VCs\n",dev->number,NR_SHAPERS,pools,rx,
1303 (zatm_dev->mem-curr*4)/VC_SIZE);
1304 /* create mailboxes */
1305 for (i = 0; i < NR_MBX; i++) {
1306 void *mbx;
1307 dma_addr_t mbx_dma;
1308
1309 if (!mbx_entries[i])
1310 continue;
1311 mbx = pci_alloc_consistent(pdev, 2*MBX_SIZE(i), &mbx_dma);
1312 if (!mbx) {
1313 error = -ENOMEM;
1314 goto out;
1315 }
1316 /*
1317 * Alignment provided by pci_alloc_consistent() isn't enough
1318 * for this device.
1319 */
1320 if (((unsigned long)mbx ^ mbx_dma) & 0xffff) {
1321 printk(KERN_ERR DEV_LABEL "(itf %d): system "
1322 "bus incompatible with driver\n", dev->number);
1323 pci_free_consistent(pdev, 2*MBX_SIZE(i), mbx, mbx_dma);
1324 error = -ENODEV;
1325 goto out;
1326 }
1327 DPRINTK("mbx@0x%08lx-0x%08lx\n", mbx, mbx + MBX_SIZE(i));
1328 zatm_dev->mbx_start[i] = (unsigned long)mbx;
1329 zatm_dev->mbx_dma[i] = mbx_dma;
1330 zatm_dev->mbx_end[i] = (zatm_dev->mbx_start[i] + MBX_SIZE(i)) &
1331 0xffff;
1332 zout(mbx_dma >> 16, MSH(i));
1333 zout(mbx_dma, MSL(i));
1334 zout(zatm_dev->mbx_end[i], MBA(i));
1335 zout((unsigned long)mbx & 0xffff, MTA(i));
1336 zout((unsigned long)mbx & 0xffff, MWA(i));
1337 }
1338 error = start_tx(dev);
1339 if (error)
1340 goto out;
1341 error = start_rx(dev);
1342 if (error)
1343 goto out_tx;
1344 error = dev->phy->start(dev);
1345 if (error)
1346 goto out_rx;
1347 zout(0xffffffff,IMR); /* enable interrupts */
1348 /* enable TX & RX */
1349 zout(zin(GMR) | uPD98401_GMR_SE | uPD98401_GMR_RE,GMR);
1350 done:
1351 return error;
1352
1353 out_rx:
1354 kfree(zatm_dev->rx_map);
1355 out_tx:
1356 kfree(zatm_dev->tx_map);
1357 out:
1358 while (i-- > 0) {
1359 pci_free_consistent(pdev, 2*MBX_SIZE(i),
1360 (void *)zatm_dev->mbx_start[i],
1361 zatm_dev->mbx_dma[i]);
1362 }
1363 free_irq(zatm_dev->irq, dev);
1364 goto done;
1365 }
1366
1367
zatm_close(struct atm_vcc * vcc)1368 static void zatm_close(struct atm_vcc *vcc)
1369 {
1370 DPRINTK(">zatm_close\n");
1371 if (!ZATM_VCC(vcc)) return;
1372 clear_bit(ATM_VF_READY,&vcc->flags);
1373 close_rx(vcc);
1374 EVENT("close_tx\n",0,0);
1375 close_tx(vcc);
1376 DPRINTK("zatm_close: done waiting\n");
1377 /* deallocate memory */
1378 kfree(ZATM_VCC(vcc));
1379 vcc->dev_data = NULL;
1380 clear_bit(ATM_VF_ADDR,&vcc->flags);
1381 }
1382
1383
zatm_open(struct atm_vcc * vcc)1384 static int zatm_open(struct atm_vcc *vcc)
1385 {
1386 struct zatm_dev *zatm_dev;
1387 struct zatm_vcc *zatm_vcc;
1388 short vpi = vcc->vpi;
1389 int vci = vcc->vci;
1390 int error;
1391
1392 DPRINTK(">zatm_open\n");
1393 zatm_dev = ZATM_DEV(vcc->dev);
1394 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1395 vcc->dev_data = NULL;
1396 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1397 set_bit(ATM_VF_ADDR,&vcc->flags);
1398 if (vcc->qos.aal != ATM_AAL5) return -EINVAL; /* @@@ AAL0 */
1399 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1400 vcc->vci);
1401 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1402 zatm_vcc = kmalloc(sizeof(struct zatm_vcc),GFP_KERNEL);
1403 if (!zatm_vcc) {
1404 clear_bit(ATM_VF_ADDR,&vcc->flags);
1405 return -ENOMEM;
1406 }
1407 vcc->dev_data = zatm_vcc;
1408 ZATM_VCC(vcc)->tx_chan = 0; /* for zatm_close after open_rx */
1409 if ((error = open_rx_first(vcc))) {
1410 zatm_close(vcc);
1411 return error;
1412 }
1413 if ((error = open_tx_first(vcc))) {
1414 zatm_close(vcc);
1415 return error;
1416 }
1417 }
1418 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1419 if ((error = open_rx_second(vcc))) {
1420 zatm_close(vcc);
1421 return error;
1422 }
1423 if ((error = open_tx_second(vcc))) {
1424 zatm_close(vcc);
1425 return error;
1426 }
1427 set_bit(ATM_VF_READY,&vcc->flags);
1428 return 0;
1429 }
1430
1431
zatm_change_qos(struct atm_vcc * vcc,struct atm_qos * qos,int flags)1432 static int zatm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flags)
1433 {
1434 printk("Not yet implemented\n");
1435 return -ENOSYS;
1436 /* @@@ */
1437 }
1438
1439
zatm_ioctl(struct atm_dev * dev,unsigned int cmd,void __user * arg)1440 static int zatm_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1441 {
1442 struct zatm_dev *zatm_dev;
1443 unsigned long flags;
1444
1445 zatm_dev = ZATM_DEV(dev);
1446 switch (cmd) {
1447 case ZATM_GETPOOLZ:
1448 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1449 /* fall through */
1450 case ZATM_GETPOOL:
1451 {
1452 struct zatm_pool_info info;
1453 int pool;
1454
1455 if (get_user(pool,
1456 &((struct zatm_pool_req __user *) arg)->pool_num))
1457 return -EFAULT;
1458 if (pool < 0 || pool > ZATM_LAST_POOL)
1459 return -EINVAL;
1460 spin_lock_irqsave(&zatm_dev->lock, flags);
1461 info = zatm_dev->pool_info[pool];
1462 if (cmd == ZATM_GETPOOLZ) {
1463 zatm_dev->pool_info[pool].rqa_count = 0;
1464 zatm_dev->pool_info[pool].rqu_count = 0;
1465 }
1466 spin_unlock_irqrestore(&zatm_dev->lock, flags);
1467 return copy_to_user(
1468 &((struct zatm_pool_req __user *) arg)->info,
1469 &info,sizeof(info)) ? -EFAULT : 0;
1470 }
1471 case ZATM_SETPOOL:
1472 {
1473 struct zatm_pool_info info;
1474 int pool;
1475
1476 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1477 if (get_user(pool,
1478 &((struct zatm_pool_req __user *) arg)->pool_num))
1479 return -EFAULT;
1480 if (pool < 0 || pool > ZATM_LAST_POOL)
1481 return -EINVAL;
1482 if (copy_from_user(&info,
1483 &((struct zatm_pool_req __user *) arg)->info,
1484 sizeof(info))) return -EFAULT;
1485 if (!info.low_water)
1486 info.low_water = zatm_dev->
1487 pool_info[pool].low_water;
1488 if (!info.high_water)
1489 info.high_water = zatm_dev->
1490 pool_info[pool].high_water;
1491 if (!info.next_thres)
1492 info.next_thres = zatm_dev->
1493 pool_info[pool].next_thres;
1494 if (info.low_water >= info.high_water ||
1495 info.low_water < 0)
1496 return -EINVAL;
1497 spin_lock_irqsave(&zatm_dev->lock, flags);
1498 zatm_dev->pool_info[pool].low_water =
1499 info.low_water;
1500 zatm_dev->pool_info[pool].high_water =
1501 info.high_water;
1502 zatm_dev->pool_info[pool].next_thres =
1503 info.next_thres;
1504 spin_unlock_irqrestore(&zatm_dev->lock, flags);
1505 return 0;
1506 }
1507 default:
1508 if (!dev->phy->ioctl) return -ENOIOCTLCMD;
1509 return dev->phy->ioctl(dev,cmd,arg);
1510 }
1511 }
1512
1513
zatm_getsockopt(struct atm_vcc * vcc,int level,int optname,void __user * optval,int optlen)1514 static int zatm_getsockopt(struct atm_vcc *vcc,int level,int optname,
1515 void __user *optval,int optlen)
1516 {
1517 return -EINVAL;
1518 }
1519
1520
zatm_setsockopt(struct atm_vcc * vcc,int level,int optname,void __user * optval,unsigned int optlen)1521 static int zatm_setsockopt(struct atm_vcc *vcc,int level,int optname,
1522 void __user *optval,unsigned int optlen)
1523 {
1524 return -EINVAL;
1525 }
1526
zatm_send(struct atm_vcc * vcc,struct sk_buff * skb)1527 static int zatm_send(struct atm_vcc *vcc,struct sk_buff *skb)
1528 {
1529 int error;
1530
1531 EVENT(">zatm_send 0x%lx\n",(unsigned long) skb,0);
1532 if (!ZATM_VCC(vcc)->tx_chan || !test_bit(ATM_VF_READY,&vcc->flags)) {
1533 if (vcc->pop) vcc->pop(vcc,skb);
1534 else dev_kfree_skb(skb);
1535 return -EINVAL;
1536 }
1537 if (!skb) {
1538 printk(KERN_CRIT "!skb in zatm_send ?\n");
1539 if (vcc->pop) vcc->pop(vcc,skb);
1540 return -EINVAL;
1541 }
1542 ATM_SKB(skb)->vcc = vcc;
1543 error = do_tx(skb);
1544 if (error != RING_BUSY) return error;
1545 skb_queue_tail(&ZATM_VCC(vcc)->backlog,skb);
1546 return 0;
1547 }
1548
1549
zatm_phy_put(struct atm_dev * dev,unsigned char value,unsigned long addr)1550 static void zatm_phy_put(struct atm_dev *dev,unsigned char value,
1551 unsigned long addr)
1552 {
1553 struct zatm_dev *zatm_dev;
1554
1555 zatm_dev = ZATM_DEV(dev);
1556 zwait;
1557 zout(value,CER);
1558 zout(uPD98401_IND_ACC | uPD98401_IA_B0 |
1559 (uPD98401_IA_TGT_PHY << uPD98401_IA_TGT_SHIFT) | addr,CMR);
1560 }
1561
1562
zatm_phy_get(struct atm_dev * dev,unsigned long addr)1563 static unsigned char zatm_phy_get(struct atm_dev *dev,unsigned long addr)
1564 {
1565 struct zatm_dev *zatm_dev;
1566
1567 zatm_dev = ZATM_DEV(dev);
1568 zwait;
1569 zout(uPD98401_IND_ACC | uPD98401_IA_B0 | uPD98401_IA_RW |
1570 (uPD98401_IA_TGT_PHY << uPD98401_IA_TGT_SHIFT) | addr,CMR);
1571 zwait;
1572 return zin(CER) & 0xff;
1573 }
1574
1575
1576 static const struct atmdev_ops ops = {
1577 .open = zatm_open,
1578 .close = zatm_close,
1579 .ioctl = zatm_ioctl,
1580 .getsockopt = zatm_getsockopt,
1581 .setsockopt = zatm_setsockopt,
1582 .send = zatm_send,
1583 .phy_put = zatm_phy_put,
1584 .phy_get = zatm_phy_get,
1585 .change_qos = zatm_change_qos,
1586 };
1587
zatm_init_one(struct pci_dev * pci_dev,const struct pci_device_id * ent)1588 static int __devinit zatm_init_one(struct pci_dev *pci_dev,
1589 const struct pci_device_id *ent)
1590 {
1591 struct atm_dev *dev;
1592 struct zatm_dev *zatm_dev;
1593 int ret = -ENOMEM;
1594
1595 zatm_dev = kmalloc(sizeof(*zatm_dev), GFP_KERNEL);
1596 if (!zatm_dev) {
1597 printk(KERN_EMERG "%s: memory shortage\n", DEV_LABEL);
1598 goto out;
1599 }
1600
1601 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
1602 if (!dev)
1603 goto out_free;
1604
1605 ret = pci_enable_device(pci_dev);
1606 if (ret < 0)
1607 goto out_deregister;
1608
1609 ret = pci_request_regions(pci_dev, DEV_LABEL);
1610 if (ret < 0)
1611 goto out_disable;
1612
1613 zatm_dev->pci_dev = pci_dev;
1614 dev->dev_data = zatm_dev;
1615 zatm_dev->copper = (int)ent->driver_data;
1616 if ((ret = zatm_init(dev)) || (ret = zatm_start(dev)))
1617 goto out_release;
1618
1619 pci_set_drvdata(pci_dev, dev);
1620 zatm_dev->more = zatm_boards;
1621 zatm_boards = dev;
1622 ret = 0;
1623 out:
1624 return ret;
1625
1626 out_release:
1627 pci_release_regions(pci_dev);
1628 out_disable:
1629 pci_disable_device(pci_dev);
1630 out_deregister:
1631 atm_dev_deregister(dev);
1632 out_free:
1633 kfree(zatm_dev);
1634 goto out;
1635 }
1636
1637
1638 MODULE_LICENSE("GPL");
1639
1640 static struct pci_device_id zatm_pci_tbl[] __devinitdata = {
1641 { PCI_VDEVICE(ZEITNET, PCI_DEVICE_ID_ZEITNET_1221), ZATM_COPPER },
1642 { PCI_VDEVICE(ZEITNET, PCI_DEVICE_ID_ZEITNET_1225), 0 },
1643 { 0, }
1644 };
1645 MODULE_DEVICE_TABLE(pci, zatm_pci_tbl);
1646
1647 static struct pci_driver zatm_driver = {
1648 .name = DEV_LABEL,
1649 .id_table = zatm_pci_tbl,
1650 .probe = zatm_init_one,
1651 };
1652
zatm_init_module(void)1653 static int __init zatm_init_module(void)
1654 {
1655 return pci_register_driver(&zatm_driver);
1656 }
1657
1658 module_init(zatm_init_module);
1659 /* module_exit not defined so not unloadable */
1660