?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge tag 'for-linus-20190706' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / net / ethernet / natsemi / sonic.c
blobd0a01e8f000aee71413425d94efc921856a062f7
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * sonic.c
4 *
5 * (C) 2005 Finn Thain
6 *
7 * Converted to DMA API, added zero-copy buffer handling, and
8 * (from the mac68k project) introduced dhd's support for 16-bit cards.
9 *
10 * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
11 *
12 * This driver is based on work from Andreas Busse, but most of
13 * the code is rewritten.
14 *
15 * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
16 *
17 * Core code included by system sonic drivers
18 *
19 * And... partially rewritten again by David Huggins-Daines in order
20 * to cope with screwed up Macintosh NICs that may or may not use
21 * 16-bit DMA.
22 *
23 * (C) 1999 David Huggins-Daines <dhd@debian.org>
24 *
25 */
26
27 /*
28 * Sources: Olivetti M700-10 Risc Personal Computer hardware handbook,
29 * National Semiconductors data sheet for the DP83932B Sonic Ethernet
30 * controller, and the files "8390.c" and "skeleton.c" in this directory.
31 *
32 * Additional sources: Nat Semi data sheet for the DP83932C and Nat Semi
33 * Application Note AN-746, the files "lance.c" and "ibmlana.c". See also
34 * the NetBSD file "sys/arch/mac68k/dev/if_sn.c".
35 */
36
37 static unsigned int version_printed;
38
39 static int sonic_debug = -1;
40 module_param(sonic_debug, int, 0);
41 MODULE_PARM_DESC(sonic_debug, "debug message level");
42
43 static void sonic_msg_init(struct net_device *dev)
44 {
45 struct sonic_local *lp = netdev_priv(dev);
46
47 lp->msg_enable = netif_msg_init(sonic_debug, 0);
48
49 if (version_printed++ == 0)
50 netif_dbg(lp, drv, dev, "%s", version);
51 }
52
53 /*
54 * Open/initialize the SONIC controller.
55 *
56 * This routine should set everything up anew at each open, even
57 * registers that "should" only need to be set once at boot, so that
58 * there is non-reboot way to recover if something goes wrong.
59 */
60 static int sonic_open(struct net_device *dev)
61 {
62 struct sonic_local *lp = netdev_priv(dev);
63 int i;
64
65 netif_dbg(lp, ifup, dev, "%s: initializing sonic driver\n", __func__);
66
67 for (i = 0; i < SONIC_NUM_RRS; i++) {
68 struct sk_buff *skb = netdev_alloc_skb(dev, SONIC_RBSIZE + 2);
69 if (skb == NULL) {
70 while(i > 0) { /* free any that were allocated successfully */
71 i--;
72 dev_kfree_skb(lp->rx_skb[i]);
73 lp->rx_skb[i] = NULL;
74 }
75 printk(KERN_ERR "%s: couldn't allocate receive buffers\n",
76 dev->name);
77 return -ENOMEM;
78 }
79 /* align IP header unless DMA requires otherwise */
80 if (SONIC_BUS_SCALE(lp->dma_bitmode) == 2)
81 skb_reserve(skb, 2);
82 lp->rx_skb[i] = skb;
83 }
84
85 for (i = 0; i < SONIC_NUM_RRS; i++) {
86 dma_addr_t laddr = dma_map_single(lp->device, skb_put(lp->rx_skb[i], SONIC_RBSIZE),
87 SONIC_RBSIZE, DMA_FROM_DEVICE);
88 if (dma_mapping_error(lp->device, laddr)) {
89 while(i > 0) { /* free any that were mapped successfully */
90 i--;
91 dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE);
92 lp->rx_laddr[i] = (dma_addr_t)0;
93 }
94 for (i = 0; i < SONIC_NUM_RRS; i++) {
95 dev_kfree_skb(lp->rx_skb[i]);
96 lp->rx_skb[i] = NULL;
97 }
98 printk(KERN_ERR "%s: couldn't map rx DMA buffers\n",
99 dev->name);
100 return -ENOMEM;
101 }
102 lp->rx_laddr[i] = laddr;
103 }
104
105 /*
106 * Initialize the SONIC
107 */
108 sonic_init(dev);
109
110 netif_start_queue(dev);
111
112 netif_dbg(lp, ifup, dev, "%s: Initialization done\n", __func__);
113
114 return 0;
115 }
116
117
118 /*
119 * Close the SONIC device
120 */
121 static int sonic_close(struct net_device *dev)
122 {
123 struct sonic_local *lp = netdev_priv(dev);
124 int i;
125
126 netif_dbg(lp, ifdown, dev, "%s\n", __func__);
127
128 netif_stop_queue(dev);
129
130 /*
131 * stop the SONIC, disable interrupts
132 */
133 SONIC_WRITE(SONIC_IMR, 0);
134 SONIC_WRITE(SONIC_ISR, 0x7fff);
135 SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
136
137 /* unmap and free skbs that haven't been transmitted */
138 for (i = 0; i < SONIC_NUM_TDS; i++) {
139 if(lp->tx_laddr[i]) {
140 dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE);
141 lp->tx_laddr[i] = (dma_addr_t)0;
142 }
143 if(lp->tx_skb[i]) {
144 dev_kfree_skb(lp->tx_skb[i]);
145 lp->tx_skb[i] = NULL;
146 }
147 }
148
149 /* unmap and free the receive buffers */
150 for (i = 0; i < SONIC_NUM_RRS; i++) {
151 if(lp->rx_laddr[i]) {
152 dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE);
153 lp->rx_laddr[i] = (dma_addr_t)0;
154 }
155 if(lp->rx_skb[i]) {
156 dev_kfree_skb(lp->rx_skb[i]);
157 lp->rx_skb[i] = NULL;
158 }
159 }
160
161 return 0;
162 }
163
164 static void sonic_tx_timeout(struct net_device *dev)
165 {
166 struct sonic_local *lp = netdev_priv(dev);
167 int i;
168 /*
169 * put the Sonic into software-reset mode and
170 * disable all interrupts before releasing DMA buffers
171 */
172 SONIC_WRITE(SONIC_IMR, 0);
173 SONIC_WRITE(SONIC_ISR, 0x7fff);
174 SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
175 /* We could resend the original skbs. Easier to re-initialise. */
176 for (i = 0; i < SONIC_NUM_TDS; i++) {
177 if(lp->tx_laddr[i]) {
178 dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE);
179 lp->tx_laddr[i] = (dma_addr_t)0;
180 }
181 if(lp->tx_skb[i]) {
182 dev_kfree_skb(lp->tx_skb[i]);
183 lp->tx_skb[i] = NULL;
184 }
185 }
186 /* Try to restart the adaptor. */
187 sonic_init(dev);
188 lp->stats.tx_errors++;
189 netif_trans_update(dev); /* prevent tx timeout */
190 netif_wake_queue(dev);
191 }
192
193 /*
194 * transmit packet
195 *
196 * Appends new TD during transmission thus avoiding any TX interrupts
197 * until we run out of TDs.
198 * This routine interacts closely with the ISR in that it may,
199 * set tx_skb[i]
200 * reset the status flags of the new TD
201 * set and reset EOL flags
202 * stop the tx queue
203 * The ISR interacts with this routine in various ways. It may,
204 * reset tx_skb[i]
205 * test the EOL and status flags of the TDs
206 * wake the tx queue
207 * Concurrently with all of this, the SONIC is potentially writing to
208 * the status flags of the TDs.
209 * Until some mutual exclusion is added, this code will not work with SMP. However,
210 * MIPS Jazz machines and m68k Macs were all uni-processor machines.
211 */
212
213 static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev)
214 {
215 struct sonic_local *lp = netdev_priv(dev);
216 dma_addr_t laddr;
217 int length;
218 int entry = lp->next_tx;
219
220 netif_dbg(lp, tx_queued, dev, "%s: skb=%p\n", __func__, skb);
221
222 length = skb->len;
223 if (length < ETH_ZLEN) {
224 if (skb_padto(skb, ETH_ZLEN))
225 return NETDEV_TX_OK;
226 length = ETH_ZLEN;
227 }
228
229 /*
230 * Map the packet data into the logical DMA address space
231 */
232
233 laddr = dma_map_single(lp->device, skb->data, length, DMA_TO_DEVICE);
234 if (!laddr) {
235 printk(KERN_ERR "%s: failed to map tx DMA buffer.\n", dev->name);
236 dev_kfree_skb(skb);
237 return NETDEV_TX_BUSY;
238 }
239
240 sonic_tda_put(dev, entry, SONIC_TD_STATUS, 0); /* clear status */
241 sonic_tda_put(dev, entry, SONIC_TD_FRAG_COUNT, 1); /* single fragment */
242 sonic_tda_put(dev, entry, SONIC_TD_PKTSIZE, length); /* length of packet */
243 sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_L, laddr & 0xffff);
244 sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_H, laddr >> 16);
245 sonic_tda_put(dev, entry, SONIC_TD_FRAG_SIZE, length);
246 sonic_tda_put(dev, entry, SONIC_TD_LINK,
247 sonic_tda_get(dev, entry, SONIC_TD_LINK) | SONIC_EOL);
248
249 /*
250 * Must set tx_skb[entry] only after clearing status, and
251 * before clearing EOL and before stopping queue
252 */
253 wmb();
254 lp->tx_len[entry] = length;
255 lp->tx_laddr[entry] = laddr;
256 lp->tx_skb[entry] = skb;
257
258 wmb();
259 sonic_tda_put(dev, lp->eol_tx, SONIC_TD_LINK,
260 sonic_tda_get(dev, lp->eol_tx, SONIC_TD_LINK) & ~SONIC_EOL);
261 lp->eol_tx = entry;
262
263 lp->next_tx = (entry + 1) & SONIC_TDS_MASK;
264 if (lp->tx_skb[lp->next_tx] != NULL) {
265 /* The ring is full, the ISR has yet to process the next TD. */
266 netif_dbg(lp, tx_queued, dev, "%s: stopping queue\n", __func__);
267 netif_stop_queue(dev);
268 /* after this packet, wait for ISR to free up some TDAs */
269 } else netif_start_queue(dev);
270
271 netif_dbg(lp, tx_queued, dev, "%s: issuing Tx command\n", __func__);
272
273 SONIC_WRITE(SONIC_CMD, SONIC_CR_TXP);
274
275 return NETDEV_TX_OK;
276 }
277
278 /*
279 * The typical workload of the driver:
280 * Handle the network interface interrupts.
281 */
282 static irqreturn_t sonic_interrupt(int irq, void *dev_id)
283 {
284 struct net_device *dev = dev_id;
285 struct sonic_local *lp = netdev_priv(dev);
286 int status;
287
288 if (!(status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT))
289 return IRQ_NONE;
290
291 do {
292 if (status & SONIC_INT_PKTRX) {
293 netif_dbg(lp, intr, dev, "%s: packet rx\n", __func__);
294 sonic_rx(dev); /* got packet(s) */
295 SONIC_WRITE(SONIC_ISR, SONIC_INT_PKTRX); /* clear the interrupt */
296 }
297
298 if (status & SONIC_INT_TXDN) {
299 int entry = lp->cur_tx;
300 int td_status;
301 int freed_some = 0;
302
303 /* At this point, cur_tx is the index of a TD that is one of:
304 * unallocated/freed (status set & tx_skb[entry] clear)
305 * allocated and sent (status set & tx_skb[entry] set )
306 * allocated and not yet sent (status clear & tx_skb[entry] set )
307 * still being allocated by sonic_send_packet (status clear & tx_skb[entry] clear)
308 */
309
310 netif_dbg(lp, intr, dev, "%s: tx done\n", __func__);
311
312 while (lp->tx_skb[entry] != NULL) {
313 if ((td_status = sonic_tda_get(dev, entry, SONIC_TD_STATUS)) == 0)
314 break;
315
316 if (td_status & 0x0001) {
317 lp->stats.tx_packets++;
318 lp->stats.tx_bytes += sonic_tda_get(dev, entry, SONIC_TD_PKTSIZE);
319 } else {
320 lp->stats.tx_errors++;
321 if (td_status & 0x0642)
322 lp->stats.tx_aborted_errors++;
323 if (td_status & 0x0180)
324 lp->stats.tx_carrier_errors++;
325 if (td_status & 0x0020)
326 lp->stats.tx_window_errors++;
327 if (td_status & 0x0004)
328 lp->stats.tx_fifo_errors++;
329 }
330
331 /* We must free the original skb */
332 dev_consume_skb_irq(lp->tx_skb[entry]);
333 lp->tx_skb[entry] = NULL;
334 /* and unmap DMA buffer */
335 dma_unmap_single(lp->device, lp->tx_laddr[entry], lp->tx_len[entry], DMA_TO_DEVICE);
336 lp->tx_laddr[entry] = (dma_addr_t)0;
337 freed_some = 1;
338
339 if (sonic_tda_get(dev, entry, SONIC_TD_LINK) & SONIC_EOL) {
340 entry = (entry + 1) & SONIC_TDS_MASK;
341 break;
342 }
343 entry = (entry + 1) & SONIC_TDS_MASK;
344 }
345
346 if (freed_some || lp->tx_skb[entry] == NULL)
347 netif_wake_queue(dev); /* The ring is no longer full */
348 lp->cur_tx = entry;
349 SONIC_WRITE(SONIC_ISR, SONIC_INT_TXDN); /* clear the interrupt */
350 }
351
352 /*
353 * check error conditions
354 */
355 if (status & SONIC_INT_RFO) {
356 netif_dbg(lp, rx_err, dev, "%s: rx fifo overrun\n",
357 __func__);
358 lp->stats.rx_fifo_errors++;
359 SONIC_WRITE(SONIC_ISR, SONIC_INT_RFO); /* clear the interrupt */
360 }
361 if (status & SONIC_INT_RDE) {
362 netif_dbg(lp, rx_err, dev, "%s: rx descriptors exhausted\n",
363 __func__);
364 lp->stats.rx_dropped++;
365 SONIC_WRITE(SONIC_ISR, SONIC_INT_RDE); /* clear the interrupt */
366 }
367 if (status & SONIC_INT_RBAE) {
368 netif_dbg(lp, rx_err, dev, "%s: rx buffer area exceeded\n",
369 __func__);
370 lp->stats.rx_dropped++;
371 SONIC_WRITE(SONIC_ISR, SONIC_INT_RBAE); /* clear the interrupt */
372 }
373
374 /* counter overruns; all counters are 16bit wide */
375 if (status & SONIC_INT_FAE) {
376 lp->stats.rx_frame_errors += 65536;
377 SONIC_WRITE(SONIC_ISR, SONIC_INT_FAE); /* clear the interrupt */
378 }
379 if (status & SONIC_INT_CRC) {
380 lp->stats.rx_crc_errors += 65536;
381 SONIC_WRITE(SONIC_ISR, SONIC_INT_CRC); /* clear the interrupt */
382 }
383 if (status & SONIC_INT_MP) {
384 lp->stats.rx_missed_errors += 65536;
385 SONIC_WRITE(SONIC_ISR, SONIC_INT_MP); /* clear the interrupt */
386 }
387
388 /* transmit error */
389 if (status & SONIC_INT_TXER) {
390 if (SONIC_READ(SONIC_TCR) & SONIC_TCR_FU)
391 netif_dbg(lp, tx_err, dev, "%s: tx fifo underrun\n",
392 __func__);
393 SONIC_WRITE(SONIC_ISR, SONIC_INT_TXER); /* clear the interrupt */
394 }
395
396 /* bus retry */
397 if (status & SONIC_INT_BR) {
398 printk(KERN_ERR "%s: Bus retry occurred! Device interrupt disabled.\n",
399 dev->name);
400 /* ... to help debug DMA problems causing endless interrupts. */
401 /* Bounce the eth interface to turn on the interrupt again. */
402 SONIC_WRITE(SONIC_IMR, 0);
403 SONIC_WRITE(SONIC_ISR, SONIC_INT_BR); /* clear the interrupt */
404 }
405
406 /* load CAM done */
407 if (status & SONIC_INT_LCD)
408 SONIC_WRITE(SONIC_ISR, SONIC_INT_LCD); /* clear the interrupt */
409 } while((status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT));
410 return IRQ_HANDLED;
411 }
412
413 /*
414 * We have a good packet(s), pass it/them up the network stack.
415 */
416 static void sonic_rx(struct net_device *dev)
417 {
418 struct sonic_local *lp = netdev_priv(dev);
419 int status;
420 int entry = lp->cur_rx;
421
422 while (sonic_rda_get(dev, entry, SONIC_RD_IN_USE) == 0) {
423 struct sk_buff *used_skb;
424 struct sk_buff *new_skb;
425 dma_addr_t new_laddr;
426 u16 bufadr_l;
427 u16 bufadr_h;
428 int pkt_len;
429
430 status = sonic_rda_get(dev, entry, SONIC_RD_STATUS);
431 if (status & SONIC_RCR_PRX) {
432 /* Malloc up new buffer. */
433 new_skb = netdev_alloc_skb(dev, SONIC_RBSIZE + 2);
434 if (new_skb == NULL) {
435 lp->stats.rx_dropped++;
436 break;
437 }
438 /* provide 16 byte IP header alignment unless DMA requires otherwise */
439 if(SONIC_BUS_SCALE(lp->dma_bitmode) == 2)
440 skb_reserve(new_skb, 2);
441
442 new_laddr = dma_map_single(lp->device, skb_put(new_skb, SONIC_RBSIZE),
443 SONIC_RBSIZE, DMA_FROM_DEVICE);
444 if (!new_laddr) {
445 dev_kfree_skb(new_skb);
446 printk(KERN_ERR "%s: Failed to map rx buffer, dropping packet.\n", dev->name);
447 lp->stats.rx_dropped++;
448 break;
449 }
450
451 /* now we have a new skb to replace it, pass the used one up the stack */
452 dma_unmap_single(lp->device, lp->rx_laddr[entry], SONIC_RBSIZE, DMA_FROM_DEVICE);
453 used_skb = lp->rx_skb[entry];
454 pkt_len = sonic_rda_get(dev, entry, SONIC_RD_PKTLEN);
455 skb_trim(used_skb, pkt_len);
456 used_skb->protocol = eth_type_trans(used_skb, dev);
457 netif_rx(used_skb);
458 lp->stats.rx_packets++;
459 lp->stats.rx_bytes += pkt_len;
460
461 /* and insert the new skb */
462 lp->rx_laddr[entry] = new_laddr;
463 lp->rx_skb[entry] = new_skb;
464
465 bufadr_l = (unsigned long)new_laddr & 0xffff;
466 bufadr_h = (unsigned long)new_laddr >> 16;
467 sonic_rra_put(dev, entry, SONIC_RR_BUFADR_L, bufadr_l);
468 sonic_rra_put(dev, entry, SONIC_RR_BUFADR_H, bufadr_h);
469 } else {
470 /* This should only happen, if we enable accepting broken packets. */
471 lp->stats.rx_errors++;
472 if (status & SONIC_RCR_FAER)
473 lp->stats.rx_frame_errors++;
474 if (status & SONIC_RCR_CRCR)
475 lp->stats.rx_crc_errors++;
476 }
477 if (status & SONIC_RCR_LPKT) {
478 /*
479 * this was the last packet out of the current receive buffer
480 * give the buffer back to the SONIC
481 */
482 lp->cur_rwp += SIZEOF_SONIC_RR * SONIC_BUS_SCALE(lp->dma_bitmode);
483 if (lp->cur_rwp >= lp->rra_end) lp->cur_rwp = lp->rra_laddr & 0xffff;
484 SONIC_WRITE(SONIC_RWP, lp->cur_rwp);
485 if (SONIC_READ(SONIC_ISR) & SONIC_INT_RBE) {
486 netif_dbg(lp, rx_err, dev, "%s: rx buffer exhausted\n",
487 __func__);
488 SONIC_WRITE(SONIC_ISR, SONIC_INT_RBE); /* clear the flag */
489 }
490 } else
491 printk(KERN_ERR "%s: rx desc without RCR_LPKT. Shouldn't happen !?\n",
492 dev->name);
493 /*
494 * give back the descriptor
495 */
496 sonic_rda_put(dev, entry, SONIC_RD_LINK,
497 sonic_rda_get(dev, entry, SONIC_RD_LINK) | SONIC_EOL);
498 sonic_rda_put(dev, entry, SONIC_RD_IN_USE, 1);
499 sonic_rda_put(dev, lp->eol_rx, SONIC_RD_LINK,
500 sonic_rda_get(dev, lp->eol_rx, SONIC_RD_LINK) & ~SONIC_EOL);
501 lp->eol_rx = entry;
502 lp->cur_rx = entry = (entry + 1) & SONIC_RDS_MASK;
503 }
504 /*
505 * If any worth-while packets have been received, netif_rx()
506 * has done a mark_bh(NET_BH) for us and will work on them
507 * when we get to the bottom-half routine.
508 */
509 }
510
511
512 /*
513 * Get the current statistics.
514 * This may be called with the device open or closed.
515 */
516 static struct net_device_stats *sonic_get_stats(struct net_device *dev)
517 {
518 struct sonic_local *lp = netdev_priv(dev);
519
520 /* read the tally counter from the SONIC and reset them */
521 lp->stats.rx_crc_errors += SONIC_READ(SONIC_CRCT);
522 SONIC_WRITE(SONIC_CRCT, 0xffff);
523 lp->stats.rx_frame_errors += SONIC_READ(SONIC_FAET);
524 SONIC_WRITE(SONIC_FAET, 0xffff);
525 lp->stats.rx_missed_errors += SONIC_READ(SONIC_MPT);
526 SONIC_WRITE(SONIC_MPT, 0xffff);
527
528 return &lp->stats;
529 }
530
531
532 /*
533 * Set or clear the multicast filter for this adaptor.
534 */
535 static void sonic_multicast_list(struct net_device *dev)
536 {
537 struct sonic_local *lp = netdev_priv(dev);
538 unsigned int rcr;
539 struct netdev_hw_addr *ha;
540 unsigned char *addr;
541 int i;
542
543 rcr = SONIC_READ(SONIC_RCR) & ~(SONIC_RCR_PRO | SONIC_RCR_AMC);
544 rcr |= SONIC_RCR_BRD; /* accept broadcast packets */
545
546 if (dev->flags & IFF_PROMISC) { /* set promiscuous mode */
547 rcr |= SONIC_RCR_PRO;
548 } else {
549 if ((dev->flags & IFF_ALLMULTI) ||
550 (netdev_mc_count(dev) > 15)) {
551 rcr |= SONIC_RCR_AMC;
552 } else {
553 netif_dbg(lp, ifup, dev, "%s: mc_count %d\n", __func__,
554 netdev_mc_count(dev));
555 sonic_set_cam_enable(dev, 1); /* always enable our own address */
556 i = 1;
557 netdev_for_each_mc_addr(ha, dev) {
558 addr = ha->addr;
559 sonic_cda_put(dev, i, SONIC_CD_CAP0, addr[1] << 8 | addr[0]);
560 sonic_cda_put(dev, i, SONIC_CD_CAP1, addr[3] << 8 | addr[2]);
561 sonic_cda_put(dev, i, SONIC_CD_CAP2, addr[5] << 8 | addr[4]);
562 sonic_set_cam_enable(dev, sonic_get_cam_enable(dev) | (1 << i));
563 i++;
564 }
565 SONIC_WRITE(SONIC_CDC, 16);
566 /* issue Load CAM command */
567 SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff);
568 SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM);
569 }
570 }
571
572 netif_dbg(lp, ifup, dev, "%s: setting RCR=%x\n", __func__, rcr);
573
574 SONIC_WRITE(SONIC_RCR, rcr);
575 }
576
577
578 /*
579 * Initialize the SONIC ethernet controller.
580 */
581 static int sonic_init(struct net_device *dev)
582 {
583 unsigned int cmd;
584 struct sonic_local *lp = netdev_priv(dev);
585 int i;
586
587 /*
588 * put the Sonic into software-reset mode and
589 * disable all interrupts
590 */
591 SONIC_WRITE(SONIC_IMR, 0);
592 SONIC_WRITE(SONIC_ISR, 0x7fff);
593 SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
594
595 /*
596 * clear software reset flag, disable receiver, clear and
597 * enable interrupts, then completely initialize the SONIC
598 */
599 SONIC_WRITE(SONIC_CMD, 0);
600 SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS);
601
602 /*
603 * initialize the receive resource area
604 */
605 netif_dbg(lp, ifup, dev, "%s: initialize receive resource area\n",
606 __func__);
607
608 for (i = 0; i < SONIC_NUM_RRS; i++) {
609 u16 bufadr_l = (unsigned long)lp->rx_laddr[i] & 0xffff;
610 u16 bufadr_h = (unsigned long)lp->rx_laddr[i] >> 16;
611 sonic_rra_put(dev, i, SONIC_RR_BUFADR_L, bufadr_l);
612 sonic_rra_put(dev, i, SONIC_RR_BUFADR_H, bufadr_h);
613 sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_L, SONIC_RBSIZE >> 1);
614 sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_H, 0);
615 }
616
617 /* initialize all RRA registers */
618 lp->rra_end = (lp->rra_laddr + SONIC_NUM_RRS * SIZEOF_SONIC_RR *
619 SONIC_BUS_SCALE(lp->dma_bitmode)) & 0xffff;
620 lp->cur_rwp = (lp->rra_laddr + (SONIC_NUM_RRS - 1) * SIZEOF_SONIC_RR *
621 SONIC_BUS_SCALE(lp->dma_bitmode)) & 0xffff;
622
623 SONIC_WRITE(SONIC_RSA, lp->rra_laddr & 0xffff);
624 SONIC_WRITE(SONIC_REA, lp->rra_end);
625 SONIC_WRITE(SONIC_RRP, lp->rra_laddr & 0xffff);
626 SONIC_WRITE(SONIC_RWP, lp->cur_rwp);
627 SONIC_WRITE(SONIC_URRA, lp->rra_laddr >> 16);
628 SONIC_WRITE(SONIC_EOBC, (SONIC_RBSIZE >> 1) - (lp->dma_bitmode ? 2 : 1));
629
630 /* load the resource pointers */
631 netif_dbg(lp, ifup, dev, "%s: issuing RRRA command\n", __func__);
632
633 SONIC_WRITE(SONIC_CMD, SONIC_CR_RRRA);
634 i = 0;
635 while (i++ < 100) {
636 if (SONIC_READ(SONIC_CMD) & SONIC_CR_RRRA)
637 break;
638 }
639
640 netif_dbg(lp, ifup, dev, "%s: status=%x, i=%d\n", __func__,
641 SONIC_READ(SONIC_CMD), i);
642
643 /*
644 * Initialize the receive descriptors so that they
645 * become a circular linked list, ie. let the last
646 * descriptor point to the first again.
647 */
648 netif_dbg(lp, ifup, dev, "%s: initialize receive descriptors\n",
649 __func__);
650
651 for (i=0; i<SONIC_NUM_RDS; i++) {
652 sonic_rda_put(dev, i, SONIC_RD_STATUS, 0);
653 sonic_rda_put(dev, i, SONIC_RD_PKTLEN, 0);
654 sonic_rda_put(dev, i, SONIC_RD_PKTPTR_L, 0);
655 sonic_rda_put(dev, i, SONIC_RD_PKTPTR_H, 0);
656 sonic_rda_put(dev, i, SONIC_RD_SEQNO, 0);
657 sonic_rda_put(dev, i, SONIC_RD_IN_USE, 1);
658 sonic_rda_put(dev, i, SONIC_RD_LINK,
659 lp->rda_laddr +
660 ((i+1) * SIZEOF_SONIC_RD * SONIC_BUS_SCALE(lp->dma_bitmode)));
661 }
662 /* fix last descriptor */
663 sonic_rda_put(dev, SONIC_NUM_RDS - 1, SONIC_RD_LINK,
664 (lp->rda_laddr & 0xffff) | SONIC_EOL);
665 lp->eol_rx = SONIC_NUM_RDS - 1;
666 lp->cur_rx = 0;
667 SONIC_WRITE(SONIC_URDA, lp->rda_laddr >> 16);
668 SONIC_WRITE(SONIC_CRDA, lp->rda_laddr & 0xffff);
669
670 /*
671 * initialize transmit descriptors
672 */
673 netif_dbg(lp, ifup, dev, "%s: initialize transmit descriptors\n",
674 __func__);
675
676 for (i = 0; i < SONIC_NUM_TDS; i++) {
677 sonic_tda_put(dev, i, SONIC_TD_STATUS, 0);
678 sonic_tda_put(dev, i, SONIC_TD_CONFIG, 0);
679 sonic_tda_put(dev, i, SONIC_TD_PKTSIZE, 0);
680 sonic_tda_put(dev, i, SONIC_TD_FRAG_COUNT, 0);
681 sonic_tda_put(dev, i, SONIC_TD_LINK,
682 (lp->tda_laddr & 0xffff) +
683 (i + 1) * SIZEOF_SONIC_TD * SONIC_BUS_SCALE(lp->dma_bitmode));
684 lp->tx_skb[i] = NULL;
685 }
686 /* fix last descriptor */
687 sonic_tda_put(dev, SONIC_NUM_TDS - 1, SONIC_TD_LINK,
688 (lp->tda_laddr & 0xffff));
689
690 SONIC_WRITE(SONIC_UTDA, lp->tda_laddr >> 16);
691 SONIC_WRITE(SONIC_CTDA, lp->tda_laddr & 0xffff);
692 lp->cur_tx = lp->next_tx = 0;
693 lp->eol_tx = SONIC_NUM_TDS - 1;
694
695 /*
696 * put our own address to CAM desc[0]
697 */
698 sonic_cda_put(dev, 0, SONIC_CD_CAP0, dev->dev_addr[1] << 8 | dev->dev_addr[0]);
699 sonic_cda_put(dev, 0, SONIC_CD_CAP1, dev->dev_addr[3] << 8 | dev->dev_addr[2]);
700 sonic_cda_put(dev, 0, SONIC_CD_CAP2, dev->dev_addr[5] << 8 | dev->dev_addr[4]);
701 sonic_set_cam_enable(dev, 1);
702
703 for (i = 0; i < 16; i++)
704 sonic_cda_put(dev, i, SONIC_CD_ENTRY_POINTER, i);
705
706 /*
707 * initialize CAM registers
708 */
709 SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff);
710 SONIC_WRITE(SONIC_CDC, 16);
711
712 /*
713 * load the CAM
714 */
715 SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM);
716
717 i = 0;
718 while (i++ < 100) {
719 if (SONIC_READ(SONIC_ISR) & SONIC_INT_LCD)
720 break;
721 }
722 netif_dbg(lp, ifup, dev, "%s: CMD=%x, ISR=%x, i=%d\n", __func__,
723 SONIC_READ(SONIC_CMD), SONIC_READ(SONIC_ISR), i);
724
725 /*
726 * enable receiver, disable loopback
727 * and enable all interrupts
728 */
729 SONIC_WRITE(SONIC_CMD, SONIC_CR_RXEN | SONIC_CR_STP);
730 SONIC_WRITE(SONIC_RCR, SONIC_RCR_DEFAULT);
731 SONIC_WRITE(SONIC_TCR, SONIC_TCR_DEFAULT);
732 SONIC_WRITE(SONIC_ISR, 0x7fff);
733 SONIC_WRITE(SONIC_IMR, SONIC_IMR_DEFAULT);
734
735 cmd = SONIC_READ(SONIC_CMD);
736 if ((cmd & SONIC_CR_RXEN) == 0 || (cmd & SONIC_CR_STP) == 0)
737 printk(KERN_ERR "sonic_init: failed, status=%x\n", cmd);
738
739 netif_dbg(lp, ifup, dev, "%s: new status=%x\n", __func__,
740 SONIC_READ(SONIC_CMD));
741
742 return 0;
743 }
744
745 MODULE_LICENSE("GPL");
Linux with added FPC-III support