NET: am79c961: fix assembler warnings
[linux-2.6.git] / drivers / net / sonic.c
1 /*
2  * sonic.c
3  *
4  * (C) 2005 Finn Thain
5  *
6  * Converted to DMA API, added zero-copy buffer handling, and
7  * (from the mac68k project) introduced dhd's support for 16-bit cards.
8  *
9  * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
10  *
11  * This driver is based on work from Andreas Busse, but most of
12  * the code is rewritten.
13  *
14  * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
15  *
16  *    Core code included by system sonic drivers
17  *
18  * And... partially rewritten again by David Huggins-Daines in order
19  * to cope with screwed up Macintosh NICs that may or may not use
20  * 16-bit DMA.
21  *
22  * (C) 1999 David Huggins-Daines <dhd@debian.org>
23  *
24  */
25
26 /*
27  * Sources: Olivetti M700-10 Risc Personal Computer hardware handbook,
28  * National Semiconductors data sheet for the DP83932B Sonic Ethernet
29  * controller, and the files "8390.c" and "skeleton.c" in this directory.
30  *
31  * Additional sources: Nat Semi data sheet for the DP83932C and Nat Semi
32  * Application Note AN-746, the files "lance.c" and "ibmlana.c". See also
33  * the NetBSD file "sys/arch/mac68k/dev/if_sn.c".
34  */
35
36
37
38 /*
39  * Open/initialize the SONIC controller.
40  *
41  * This routine should set everything up anew at each open, even
42  *  registers that "should" only need to be set once at boot, so that
43  *  there is non-reboot way to recover if something goes wrong.
44  */
45 static int sonic_open(struct net_device *dev)
46 {
47         struct sonic_local *lp = netdev_priv(dev);
48         int i;
49
50         if (sonic_debug > 2)
51                 printk("sonic_open: initializing sonic driver.\n");
52
53         for (i = 0; i < SONIC_NUM_RRS; i++) {
54                 struct sk_buff *skb = dev_alloc_skb(SONIC_RBSIZE + 2);
55                 if (skb == NULL) {
56                         while(i > 0) { /* free any that were allocated successfully */
57                                 i--;
58                                 dev_kfree_skb(lp->rx_skb[i]);
59                                 lp->rx_skb[i] = NULL;
60                         }
61                         printk(KERN_ERR "%s: couldn't allocate receive buffers\n",
62                                dev->name);
63                         return -ENOMEM;
64                 }
65                 /* align IP header unless DMA requires otherwise */
66                 if (SONIC_BUS_SCALE(lp->dma_bitmode) == 2)
67                         skb_reserve(skb, 2);
68                 lp->rx_skb[i] = skb;
69         }
70
71         for (i = 0; i < SONIC_NUM_RRS; i++) {
72                 dma_addr_t laddr = dma_map_single(lp->device, skb_put(lp->rx_skb[i], SONIC_RBSIZE),
73                                                   SONIC_RBSIZE, DMA_FROM_DEVICE);
74                 if (!laddr) {
75                         while(i > 0) { /* free any that were mapped successfully */
76                                 i--;
77                                 dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE);
78                                 lp->rx_laddr[i] = (dma_addr_t)0;
79                         }
80                         for (i = 0; i < SONIC_NUM_RRS; i++) {
81                                 dev_kfree_skb(lp->rx_skb[i]);
82                                 lp->rx_skb[i] = NULL;
83                         }
84                         printk(KERN_ERR "%s: couldn't map rx DMA buffers\n",
85                                dev->name);
86                         return -ENOMEM;
87                 }
88                 lp->rx_laddr[i] = laddr;
89         }
90
91         /*
92          * Initialize the SONIC
93          */
94         sonic_init(dev);
95
96         netif_start_queue(dev);
97
98         if (sonic_debug > 2)
99                 printk("sonic_open: Initialization done.\n");
100
101         return 0;
102 }
103
104
105 /*
106  * Close the SONIC device
107  */
108 static int sonic_close(struct net_device *dev)
109 {
110         struct sonic_local *lp = netdev_priv(dev);
111         int i;
112
113         if (sonic_debug > 2)
114                 printk("sonic_close\n");
115
116         netif_stop_queue(dev);
117
118         /*
119          * stop the SONIC, disable interrupts
120          */
121         SONIC_WRITE(SONIC_IMR, 0);
122         SONIC_WRITE(SONIC_ISR, 0x7fff);
123         SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
124
125         /* unmap and free skbs that haven't been transmitted */
126         for (i = 0; i < SONIC_NUM_TDS; i++) {
127                 if(lp->tx_laddr[i]) {
128                         dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE);
129                         lp->tx_laddr[i] = (dma_addr_t)0;
130                 }
131                 if(lp->tx_skb[i]) {
132                         dev_kfree_skb(lp->tx_skb[i]);
133                         lp->tx_skb[i] = NULL;
134                 }
135         }
136
137         /* unmap and free the receive buffers */
138         for (i = 0; i < SONIC_NUM_RRS; i++) {
139                 if(lp->rx_laddr[i]) {
140                         dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE);
141                         lp->rx_laddr[i] = (dma_addr_t)0;
142                 }
143                 if(lp->rx_skb[i]) {
144                         dev_kfree_skb(lp->rx_skb[i]);
145                         lp->rx_skb[i] = NULL;
146                 }
147         }
148
149         return 0;
150 }
151
152 static void sonic_tx_timeout(struct net_device *dev)
153 {
154         struct sonic_local *lp = netdev_priv(dev);
155         int i;
156         /*
157          * put the Sonic into software-reset mode and
158          * disable all interrupts before releasing DMA buffers
159          */
160         SONIC_WRITE(SONIC_IMR, 0);
161         SONIC_WRITE(SONIC_ISR, 0x7fff);
162         SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
163         /* We could resend the original skbs. Easier to re-initialise. */
164         for (i = 0; i < SONIC_NUM_TDS; i++) {
165                 if(lp->tx_laddr[i]) {
166                         dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE);
167                         lp->tx_laddr[i] = (dma_addr_t)0;
168                 }
169                 if(lp->tx_skb[i]) {
170                         dev_kfree_skb(lp->tx_skb[i]);
171                         lp->tx_skb[i] = NULL;
172                 }
173         }
174         /* Try to restart the adaptor. */
175         sonic_init(dev);
176         lp->stats.tx_errors++;
177         dev->trans_start = jiffies; /* prevent tx timeout */
178         netif_wake_queue(dev);
179 }
180
181 /*
182  * transmit packet
183  *
184  * Appends new TD during transmission thus avoiding any TX interrupts
185  * until we run out of TDs.
186  * This routine interacts closely with the ISR in that it may,
187  *   set tx_skb[i]
188  *   reset the status flags of the new TD
189  *   set and reset EOL flags
190  *   stop the tx queue
191  * The ISR interacts with this routine in various ways. It may,
192  *   reset tx_skb[i]
193  *   test the EOL and status flags of the TDs
194  *   wake the tx queue
195  * Concurrently with all of this, the SONIC is potentially writing to
196  * the status flags of the TDs.
197  * Until some mutual exclusion is added, this code will not work with SMP. However,
198  * MIPS Jazz machines and m68k Macs were all uni-processor machines.
199  */
200
201 static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev)
202 {
203         struct sonic_local *lp = netdev_priv(dev);
204         dma_addr_t laddr;
205         int length;
206         int entry = lp->next_tx;
207
208         if (sonic_debug > 2)
209                 printk("sonic_send_packet: skb=%p, dev=%p\n", skb, dev);
210
211         length = skb->len;
212         if (length < ETH_ZLEN) {
213                 if (skb_padto(skb, ETH_ZLEN))
214                         return NETDEV_TX_OK;
215                 length = ETH_ZLEN;
216         }
217
218         /*
219          * Map the packet data into the logical DMA address space
220          */
221
222         laddr = dma_map_single(lp->device, skb->data, length, DMA_TO_DEVICE);
223         if (!laddr) {
224                 printk(KERN_ERR "%s: failed to map tx DMA buffer.\n", dev->name);
225                 dev_kfree_skb(skb);
226                 return NETDEV_TX_BUSY;
227         }
228
229         sonic_tda_put(dev, entry, SONIC_TD_STATUS, 0);       /* clear status */
230         sonic_tda_put(dev, entry, SONIC_TD_FRAG_COUNT, 1);   /* single fragment */
231         sonic_tda_put(dev, entry, SONIC_TD_PKTSIZE, length); /* length of packet */
232         sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_L, laddr & 0xffff);
233         sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_H, laddr >> 16);
234         sonic_tda_put(dev, entry, SONIC_TD_FRAG_SIZE, length);
235         sonic_tda_put(dev, entry, SONIC_TD_LINK,
236                 sonic_tda_get(dev, entry, SONIC_TD_LINK) | SONIC_EOL);
237
238         /*
239          * Must set tx_skb[entry] only after clearing status, and
240          * before clearing EOL and before stopping queue
241          */
242         wmb();
243         lp->tx_len[entry] = length;
244         lp->tx_laddr[entry] = laddr;
245         lp->tx_skb[entry] = skb;
246
247         wmb();
248         sonic_tda_put(dev, lp->eol_tx, SONIC_TD_LINK,
249                                   sonic_tda_get(dev, lp->eol_tx, SONIC_TD_LINK) & ~SONIC_EOL);
250         lp->eol_tx = entry;
251
252         lp->next_tx = (entry + 1) & SONIC_TDS_MASK;
253         if (lp->tx_skb[lp->next_tx] != NULL) {
254                 /* The ring is full, the ISR has yet to process the next TD. */
255                 if (sonic_debug > 3)
256                         printk("%s: stopping queue\n", dev->name);
257                 netif_stop_queue(dev);
258                 /* after this packet, wait for ISR to free up some TDAs */
259         } else netif_start_queue(dev);
260
261         if (sonic_debug > 2)
262                 printk("sonic_send_packet: issuing Tx command\n");
263
264         SONIC_WRITE(SONIC_CMD, SONIC_CR_TXP);
265
266         return NETDEV_TX_OK;
267 }
268
269 /*
270  * The typical workload of the driver:
271  * Handle the network interface interrupts.
272  */
273 static irqreturn_t sonic_interrupt(int irq, void *dev_id)
274 {
275         struct net_device *dev = dev_id;
276         struct sonic_local *lp = netdev_priv(dev);
277         int status;
278
279         if (!(status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT))
280                 return IRQ_NONE;
281
282         do {
283                 if (status & SONIC_INT_PKTRX) {
284                         if (sonic_debug > 2)
285                                 printk("%s: packet rx\n", dev->name);
286                         sonic_rx(dev);  /* got packet(s) */
287                         SONIC_WRITE(SONIC_ISR, SONIC_INT_PKTRX); /* clear the interrupt */
288                 }
289
290                 if (status & SONIC_INT_TXDN) {
291                         int entry = lp->cur_tx;
292                         int td_status;
293                         int freed_some = 0;
294
295                         /* At this point, cur_tx is the index of a TD that is one of:
296                          *   unallocated/freed                          (status set   & tx_skb[entry] clear)
297                          *   allocated and sent                         (status set   & tx_skb[entry] set  )
298                          *   allocated and not yet sent                 (status clear & tx_skb[entry] set  )
299                          *   still being allocated by sonic_send_packet (status clear & tx_skb[entry] clear)
300                          */
301
302                         if (sonic_debug > 2)
303                                 printk("%s: tx done\n", dev->name);
304
305                         while (lp->tx_skb[entry] != NULL) {
306                                 if ((td_status = sonic_tda_get(dev, entry, SONIC_TD_STATUS)) == 0)
307                                         break;
308
309                                 if (td_status & 0x0001) {
310                                         lp->stats.tx_packets++;
311                                         lp->stats.tx_bytes += sonic_tda_get(dev, entry, SONIC_TD_PKTSIZE);
312                                 } else {
313                                         lp->stats.tx_errors++;
314                                         if (td_status & 0x0642)
315                                                 lp->stats.tx_aborted_errors++;
316                                         if (td_status & 0x0180)
317                                                 lp->stats.tx_carrier_errors++;
318                                         if (td_status & 0x0020)
319                                                 lp->stats.tx_window_errors++;
320                                         if (td_status & 0x0004)
321                                                 lp->stats.tx_fifo_errors++;
322                                 }
323
324                                 /* We must free the original skb */
325                                 dev_kfree_skb_irq(lp->tx_skb[entry]);
326                                 lp->tx_skb[entry] = NULL;
327                                 /* and unmap DMA buffer */
328                                 dma_unmap_single(lp->device, lp->tx_laddr[entry], lp->tx_len[entry], DMA_TO_DEVICE);
329                                 lp->tx_laddr[entry] = (dma_addr_t)0;
330                                 freed_some = 1;
331
332                                 if (sonic_tda_get(dev, entry, SONIC_TD_LINK) & SONIC_EOL) {
333                                         entry = (entry + 1) & SONIC_TDS_MASK;
334                                         break;
335                                 }
336                                 entry = (entry + 1) & SONIC_TDS_MASK;
337                         }
338
339                         if (freed_some || lp->tx_skb[entry] == NULL)
340                                 netif_wake_queue(dev);  /* The ring is no longer full */
341                         lp->cur_tx = entry;
342                         SONIC_WRITE(SONIC_ISR, SONIC_INT_TXDN); /* clear the interrupt */
343                 }
344
345                 /*
346                  * check error conditions
347                  */
348                 if (status & SONIC_INT_RFO) {
349                         if (sonic_debug > 1)
350                                 printk("%s: rx fifo overrun\n", dev->name);
351                         lp->stats.rx_fifo_errors++;
352                         SONIC_WRITE(SONIC_ISR, SONIC_INT_RFO); /* clear the interrupt */
353                 }
354                 if (status & SONIC_INT_RDE) {
355                         if (sonic_debug > 1)
356                                 printk("%s: rx descriptors exhausted\n", dev->name);
357                         lp->stats.rx_dropped++;
358                         SONIC_WRITE(SONIC_ISR, SONIC_INT_RDE); /* clear the interrupt */
359                 }
360                 if (status & SONIC_INT_RBAE) {
361                         if (sonic_debug > 1)
362                                 printk("%s: rx buffer area exceeded\n", dev->name);
363                         lp->stats.rx_dropped++;
364                         SONIC_WRITE(SONIC_ISR, SONIC_INT_RBAE); /* clear the interrupt */
365                 }
366
367                 /* counter overruns; all counters are 16bit wide */
368                 if (status & SONIC_INT_FAE) {
369                         lp->stats.rx_frame_errors += 65536;
370                         SONIC_WRITE(SONIC_ISR, SONIC_INT_FAE); /* clear the interrupt */
371                 }
372                 if (status & SONIC_INT_CRC) {
373                         lp->stats.rx_crc_errors += 65536;
374                         SONIC_WRITE(SONIC_ISR, SONIC_INT_CRC); /* clear the interrupt */
375                 }
376                 if (status & SONIC_INT_MP) {
377                         lp->stats.rx_missed_errors += 65536;
378                         SONIC_WRITE(SONIC_ISR, SONIC_INT_MP); /* clear the interrupt */
379                 }
380
381                 /* transmit error */
382                 if (status & SONIC_INT_TXER) {
383                         if ((SONIC_READ(SONIC_TCR) & SONIC_TCR_FU) && (sonic_debug > 2))
384                                 printk(KERN_ERR "%s: tx fifo underrun\n", dev->name);
385                         SONIC_WRITE(SONIC_ISR, SONIC_INT_TXER); /* clear the interrupt */
386                 }
387
388                 /* bus retry */
389                 if (status & SONIC_INT_BR) {
390                         printk(KERN_ERR "%s: Bus retry occurred! Device interrupt disabled.\n",
391                                 dev->name);
392                         /* ... to help debug DMA problems causing endless interrupts. */
393                         /* Bounce the eth interface to turn on the interrupt again. */
394                         SONIC_WRITE(SONIC_IMR, 0);
395                         SONIC_WRITE(SONIC_ISR, SONIC_INT_BR); /* clear the interrupt */
396                 }
397
398                 /* load CAM done */
399                 if (status & SONIC_INT_LCD)
400                         SONIC_WRITE(SONIC_ISR, SONIC_INT_LCD); /* clear the interrupt */
401         } while((status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT));
402         return IRQ_HANDLED;
403 }
404
405 /*
406  * We have a good packet(s), pass it/them up the network stack.
407  */
408 static void sonic_rx(struct net_device *dev)
409 {
410         struct sonic_local *lp = netdev_priv(dev);
411         int status;
412         int entry = lp->cur_rx;
413
414         while (sonic_rda_get(dev, entry, SONIC_RD_IN_USE) == 0) {
415                 struct sk_buff *used_skb;
416                 struct sk_buff *new_skb;
417                 dma_addr_t new_laddr;
418                 u16 bufadr_l;
419                 u16 bufadr_h;
420                 int pkt_len;
421
422                 status = sonic_rda_get(dev, entry, SONIC_RD_STATUS);
423                 if (status & SONIC_RCR_PRX) {
424                         /* Malloc up new buffer. */
425                         new_skb = dev_alloc_skb(SONIC_RBSIZE + 2);
426                         if (new_skb == NULL) {
427                                 printk(KERN_ERR "%s: Memory squeeze, dropping packet.\n", dev->name);
428                                 lp->stats.rx_dropped++;
429                                 break;
430                         }
431                         /* provide 16 byte IP header alignment unless DMA requires otherwise */
432                         if(SONIC_BUS_SCALE(lp->dma_bitmode) == 2)
433                                 skb_reserve(new_skb, 2);
434
435                         new_laddr = dma_map_single(lp->device, skb_put(new_skb, SONIC_RBSIZE),
436                                                SONIC_RBSIZE, DMA_FROM_DEVICE);
437                         if (!new_laddr) {
438                                 dev_kfree_skb(new_skb);
439                                 printk(KERN_ERR "%s: Failed to map rx buffer, dropping packet.\n", dev->name);
440                                 lp->stats.rx_dropped++;
441                                 break;
442                         }
443
444                         /* now we have a new skb to replace it, pass the used one up the stack */
445                         dma_unmap_single(lp->device, lp->rx_laddr[entry], SONIC_RBSIZE, DMA_FROM_DEVICE);
446                         used_skb = lp->rx_skb[entry];
447                         pkt_len = sonic_rda_get(dev, entry, SONIC_RD_PKTLEN);
448                         skb_trim(used_skb, pkt_len);
449                         used_skb->protocol = eth_type_trans(used_skb, dev);
450                         netif_rx(used_skb);
451                         lp->stats.rx_packets++;
452                         lp->stats.rx_bytes += pkt_len;
453
454                         /* and insert the new skb */
455                         lp->rx_laddr[entry] = new_laddr;
456                         lp->rx_skb[entry] = new_skb;
457
458                         bufadr_l = (unsigned long)new_laddr & 0xffff;
459                         bufadr_h = (unsigned long)new_laddr >> 16;
460                         sonic_rra_put(dev, entry, SONIC_RR_BUFADR_L, bufadr_l);
461                         sonic_rra_put(dev, entry, SONIC_RR_BUFADR_H, bufadr_h);
462                 } else {
463                         /* This should only happen, if we enable accepting broken packets. */
464                         lp->stats.rx_errors++;
465                         if (status & SONIC_RCR_FAER)
466                                 lp->stats.rx_frame_errors++;
467                         if (status & SONIC_RCR_CRCR)
468                                 lp->stats.rx_crc_errors++;
469                 }
470                 if (status & SONIC_RCR_LPKT) {
471                         /*
472                          * this was the last packet out of the current receive buffer
473                          * give the buffer back to the SONIC
474                          */
475                         lp->cur_rwp += SIZEOF_SONIC_RR * SONIC_BUS_SCALE(lp->dma_bitmode);
476                         if (lp->cur_rwp >= lp->rra_end) lp->cur_rwp = lp->rra_laddr & 0xffff;
477                         SONIC_WRITE(SONIC_RWP, lp->cur_rwp);
478                         if (SONIC_READ(SONIC_ISR) & SONIC_INT_RBE) {
479                                 if (sonic_debug > 2)
480                                         printk("%s: rx buffer exhausted\n", dev->name);
481                                 SONIC_WRITE(SONIC_ISR, SONIC_INT_RBE); /* clear the flag */
482                         }
483                 } else
484                         printk(KERN_ERR "%s: rx desc without RCR_LPKT. Shouldn't happen !?\n",
485                              dev->name);
486                 /*
487                  * give back the descriptor
488                  */
489                 sonic_rda_put(dev, entry, SONIC_RD_LINK,
490                         sonic_rda_get(dev, entry, SONIC_RD_LINK) | SONIC_EOL);
491                 sonic_rda_put(dev, entry, SONIC_RD_IN_USE, 1);
492                 sonic_rda_put(dev, lp->eol_rx, SONIC_RD_LINK,
493                         sonic_rda_get(dev, lp->eol_rx, SONIC_RD_LINK) & ~SONIC_EOL);
494                 lp->eol_rx = entry;
495                 lp->cur_rx = entry = (entry + 1) & SONIC_RDS_MASK;
496         }
497         /*
498          * If any worth-while packets have been received, netif_rx()
499          * has done a mark_bh(NET_BH) for us and will work on them
500          * when we get to the bottom-half routine.
501          */
502 }
503
504
505 /*
506  * Get the current statistics.
507  * This may be called with the device open or closed.
508  */
509 static struct net_device_stats *sonic_get_stats(struct net_device *dev)
510 {
511         struct sonic_local *lp = netdev_priv(dev);
512
513         /* read the tally counter from the SONIC and reset them */
514         lp->stats.rx_crc_errors += SONIC_READ(SONIC_CRCT);
515         SONIC_WRITE(SONIC_CRCT, 0xffff);
516         lp->stats.rx_frame_errors += SONIC_READ(SONIC_FAET);
517         SONIC_WRITE(SONIC_FAET, 0xffff);
518         lp->stats.rx_missed_errors += SONIC_READ(SONIC_MPT);
519         SONIC_WRITE(SONIC_MPT, 0xffff);
520
521         return &lp->stats;
522 }
523
524
525 /*
526  * Set or clear the multicast filter for this adaptor.
527  */
528 static void sonic_multicast_list(struct net_device *dev)
529 {
530         struct sonic_local *lp = netdev_priv(dev);
531         unsigned int rcr;
532         struct netdev_hw_addr *ha;
533         unsigned char *addr;
534         int i;
535
536         rcr = SONIC_READ(SONIC_RCR) & ~(SONIC_RCR_PRO | SONIC_RCR_AMC);
537         rcr |= SONIC_RCR_BRD;   /* accept broadcast packets */
538
539         if (dev->flags & IFF_PROMISC) { /* set promiscuous mode */
540                 rcr |= SONIC_RCR_PRO;
541         } else {
542                 if ((dev->flags & IFF_ALLMULTI) ||
543                     (netdev_mc_count(dev) > 15)) {
544                         rcr |= SONIC_RCR_AMC;
545                 } else {
546                         if (sonic_debug > 2)
547                                 printk("sonic_multicast_list: mc_count %d\n",
548                                        netdev_mc_count(dev));
549                         sonic_set_cam_enable(dev, 1);  /* always enable our own address */
550                         i = 1;
551                         netdev_for_each_mc_addr(ha, dev) {
552                                 addr = ha->addr;
553                                 sonic_cda_put(dev, i, SONIC_CD_CAP0, addr[1] << 8 | addr[0]);
554                                 sonic_cda_put(dev, i, SONIC_CD_CAP1, addr[3] << 8 | addr[2]);
555                                 sonic_cda_put(dev, i, SONIC_CD_CAP2, addr[5] << 8 | addr[4]);
556                                 sonic_set_cam_enable(dev, sonic_get_cam_enable(dev) | (1 << i));
557                                 i++;
558                         }
559                         SONIC_WRITE(SONIC_CDC, 16);
560                         /* issue Load CAM command */
561                         SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff);
562                         SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM);
563                 }
564         }
565
566         if (sonic_debug > 2)
567                 printk("sonic_multicast_list: setting RCR=%x\n", rcr);
568
569         SONIC_WRITE(SONIC_RCR, rcr);
570 }
571
572
573 /*
574  * Initialize the SONIC ethernet controller.
575  */
576 static int sonic_init(struct net_device *dev)
577 {
578         unsigned int cmd;
579         struct sonic_local *lp = netdev_priv(dev);
580         int i;
581
582         /*
583          * put the Sonic into software-reset mode and
584          * disable all interrupts
585          */
586         SONIC_WRITE(SONIC_IMR, 0);
587         SONIC_WRITE(SONIC_ISR, 0x7fff);
588         SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
589
590         /*
591          * clear software reset flag, disable receiver, clear and
592          * enable interrupts, then completely initialize the SONIC
593          */
594         SONIC_WRITE(SONIC_CMD, 0);
595         SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS);
596
597         /*
598          * initialize the receive resource area
599          */
600         if (sonic_debug > 2)
601                 printk("sonic_init: initialize receive resource area\n");
602
603         for (i = 0; i < SONIC_NUM_RRS; i++) {
604                 u16 bufadr_l = (unsigned long)lp->rx_laddr[i] & 0xffff;
605                 u16 bufadr_h = (unsigned long)lp->rx_laddr[i] >> 16;
606                 sonic_rra_put(dev, i, SONIC_RR_BUFADR_L, bufadr_l);
607                 sonic_rra_put(dev, i, SONIC_RR_BUFADR_H, bufadr_h);
608                 sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_L, SONIC_RBSIZE >> 1);
609                 sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_H, 0);
610         }
611
612         /* initialize all RRA registers */
613         lp->rra_end = (lp->rra_laddr + SONIC_NUM_RRS * SIZEOF_SONIC_RR *
614                                         SONIC_BUS_SCALE(lp->dma_bitmode)) & 0xffff;
615         lp->cur_rwp = (lp->rra_laddr + (SONIC_NUM_RRS - 1) * SIZEOF_SONIC_RR *
616                                         SONIC_BUS_SCALE(lp->dma_bitmode)) & 0xffff;
617
618         SONIC_WRITE(SONIC_RSA, lp->rra_laddr & 0xffff);
619         SONIC_WRITE(SONIC_REA, lp->rra_end);
620         SONIC_WRITE(SONIC_RRP, lp->rra_laddr & 0xffff);
621         SONIC_WRITE(SONIC_RWP, lp->cur_rwp);
622         SONIC_WRITE(SONIC_URRA, lp->rra_laddr >> 16);
623         SONIC_WRITE(SONIC_EOBC, (SONIC_RBSIZE >> 1) - (lp->dma_bitmode ? 2 : 1));
624
625         /* load the resource pointers */
626         if (sonic_debug > 3)
627                 printk("sonic_init: issuing RRRA command\n");
628
629         SONIC_WRITE(SONIC_CMD, SONIC_CR_RRRA);
630         i = 0;
631         while (i++ < 100) {
632                 if (SONIC_READ(SONIC_CMD) & SONIC_CR_RRRA)
633                         break;
634         }
635
636         if (sonic_debug > 2)
637                 printk("sonic_init: status=%x i=%d\n", SONIC_READ(SONIC_CMD), i);
638
639         /*
640          * Initialize the receive descriptors so that they
641          * become a circular linked list, ie. let the last
642          * descriptor point to the first again.
643          */
644         if (sonic_debug > 2)
645                 printk("sonic_init: initialize receive descriptors\n");
646         for (i=0; i<SONIC_NUM_RDS; i++) {
647                 sonic_rda_put(dev, i, SONIC_RD_STATUS, 0);
648                 sonic_rda_put(dev, i, SONIC_RD_PKTLEN, 0);
649                 sonic_rda_put(dev, i, SONIC_RD_PKTPTR_L, 0);
650                 sonic_rda_put(dev, i, SONIC_RD_PKTPTR_H, 0);
651                 sonic_rda_put(dev, i, SONIC_RD_SEQNO, 0);
652                 sonic_rda_put(dev, i, SONIC_RD_IN_USE, 1);
653                 sonic_rda_put(dev, i, SONIC_RD_LINK,
654                         lp->rda_laddr +
655                         ((i+1) * SIZEOF_SONIC_RD * SONIC_BUS_SCALE(lp->dma_bitmode)));
656         }
657         /* fix last descriptor */
658         sonic_rda_put(dev, SONIC_NUM_RDS - 1, SONIC_RD_LINK,
659                 (lp->rda_laddr & 0xffff) | SONIC_EOL);
660         lp->eol_rx = SONIC_NUM_RDS - 1;
661         lp->cur_rx = 0;
662         SONIC_WRITE(SONIC_URDA, lp->rda_laddr >> 16);
663         SONIC_WRITE(SONIC_CRDA, lp->rda_laddr & 0xffff);
664
665         /*
666          * initialize transmit descriptors
667          */
668         if (sonic_debug > 2)
669                 printk("sonic_init: initialize transmit descriptors\n");
670         for (i = 0; i < SONIC_NUM_TDS; i++) {
671                 sonic_tda_put(dev, i, SONIC_TD_STATUS, 0);
672                 sonic_tda_put(dev, i, SONIC_TD_CONFIG, 0);
673                 sonic_tda_put(dev, i, SONIC_TD_PKTSIZE, 0);
674                 sonic_tda_put(dev, i, SONIC_TD_FRAG_COUNT, 0);
675                 sonic_tda_put(dev, i, SONIC_TD_LINK,
676                         (lp->tda_laddr & 0xffff) +
677                         (i + 1) * SIZEOF_SONIC_TD * SONIC_BUS_SCALE(lp->dma_bitmode));
678                 lp->tx_skb[i] = NULL;
679         }
680         /* fix last descriptor */
681         sonic_tda_put(dev, SONIC_NUM_TDS - 1, SONIC_TD_LINK,
682                 (lp->tda_laddr & 0xffff));
683
684         SONIC_WRITE(SONIC_UTDA, lp->tda_laddr >> 16);
685         SONIC_WRITE(SONIC_CTDA, lp->tda_laddr & 0xffff);
686         lp->cur_tx = lp->next_tx = 0;
687         lp->eol_tx = SONIC_NUM_TDS - 1;
688
689         /*
690          * put our own address to CAM desc[0]
691          */
692         sonic_cda_put(dev, 0, SONIC_CD_CAP0, dev->dev_addr[1] << 8 | dev->dev_addr[0]);
693         sonic_cda_put(dev, 0, SONIC_CD_CAP1, dev->dev_addr[3] << 8 | dev->dev_addr[2]);
694         sonic_cda_put(dev, 0, SONIC_CD_CAP2, dev->dev_addr[5] << 8 | dev->dev_addr[4]);
695         sonic_set_cam_enable(dev, 1);
696
697         for (i = 0; i < 16; i++)
698                 sonic_cda_put(dev, i, SONIC_CD_ENTRY_POINTER, i);
699
700         /*
701          * initialize CAM registers
702          */
703         SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff);
704         SONIC_WRITE(SONIC_CDC, 16);
705
706         /*
707          * load the CAM
708          */
709         SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM);
710
711         i = 0;
712         while (i++ < 100) {
713                 if (SONIC_READ(SONIC_ISR) & SONIC_INT_LCD)
714                         break;
715         }
716         if (sonic_debug > 2) {
717                 printk("sonic_init: CMD=%x, ISR=%x\n, i=%d",
718                        SONIC_READ(SONIC_CMD), SONIC_READ(SONIC_ISR), i);
719         }
720
721         /*
722          * enable receiver, disable loopback
723          * and enable all interrupts
724          */
725         SONIC_WRITE(SONIC_CMD, SONIC_CR_RXEN | SONIC_CR_STP);
726         SONIC_WRITE(SONIC_RCR, SONIC_RCR_DEFAULT);
727         SONIC_WRITE(SONIC_TCR, SONIC_TCR_DEFAULT);
728         SONIC_WRITE(SONIC_ISR, 0x7fff);
729         SONIC_WRITE(SONIC_IMR, SONIC_IMR_DEFAULT);
730
731         cmd = SONIC_READ(SONIC_CMD);
732         if ((cmd & SONIC_CR_RXEN) == 0 || (cmd & SONIC_CR_STP) == 0)
733                 printk(KERN_ERR "sonic_init: failed, status=%x\n", cmd);
734
735         if (sonic_debug > 2)
736                 printk("sonic_init: new status=%x\n",
737                        SONIC_READ(SONIC_CMD));
738
739         return 0;
740 }
741
742 MODULE_LICENSE("GPL");