6 * Converted to DMA API, added zero-copy buffer handling, and
7 * (from the mac68k project) introduced dhd's support for 16-bit cards.
9 * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
11 * This driver is based on work from Andreas Busse, but most of
12 * the code is rewritten.
14 * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
16 * Core code included by system sonic drivers
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
22 * (C) 1999 David Huggins-Daines <dhd@debian.org>
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.
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".
39 * Open/initialize the SONIC controller.
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.
45 static int sonic_open(struct net_device *dev)
47 struct sonic_local *lp = netdev_priv(dev);
51 printk("sonic_open: initializing sonic driver.\n");
53 spin_lock_init(&lp->lock);
55 for (i = 0; i < SONIC_NUM_RRS; i++) {
56 struct sk_buff *skb = netdev_alloc_skb(dev, SONIC_RBSIZE + 2);
58 while(i > 0) { /* free any that were allocated successfully */
60 dev_kfree_skb(lp->rx_skb[i]);
63 printk(KERN_ERR "%s: couldn't allocate receive buffers\n",
67 /* align IP header unless DMA requires otherwise */
68 if (SONIC_BUS_SCALE(lp->dma_bitmode) == 2)
73 for (i = 0; i < SONIC_NUM_RRS; i++) {
74 dma_addr_t laddr = dma_map_single(lp->device, skb_put(lp->rx_skb[i], SONIC_RBSIZE),
75 SONIC_RBSIZE, DMA_FROM_DEVICE);
76 if (dma_mapping_error(lp->device, laddr)) {
77 while(i > 0) { /* free any that were mapped successfully */
79 dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE);
80 lp->rx_laddr[i] = (dma_addr_t)0;
82 for (i = 0; i < SONIC_NUM_RRS; i++) {
83 dev_kfree_skb(lp->rx_skb[i]);
86 printk(KERN_ERR "%s: couldn't map rx DMA buffers\n",
90 lp->rx_laddr[i] = laddr;
94 * Initialize the SONIC
98 netif_start_queue(dev);
101 printk("sonic_open: Initialization done.\n");
106 /* Wait for the SONIC to become idle. */
107 static void sonic_quiesce(struct net_device *dev, u16 mask)
109 struct sonic_local * __maybe_unused lp = netdev_priv(dev);
113 for (i = 0; i < 1000; ++i) {
114 bits = SONIC_READ(SONIC_CMD) & mask;
117 if (irqs_disabled() || in_interrupt())
120 usleep_range(100, 200);
122 WARN_ONCE(1, "command deadline expired! 0x%04x\n", bits);
126 * Close the SONIC device
128 static int sonic_close(struct net_device *dev)
130 struct sonic_local *lp = netdev_priv(dev);
134 printk("sonic_close\n");
136 netif_stop_queue(dev);
139 * stop the SONIC, disable interrupts
141 SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS);
142 sonic_quiesce(dev, SONIC_CR_ALL);
144 SONIC_WRITE(SONIC_IMR, 0);
145 SONIC_WRITE(SONIC_ISR, 0x7fff);
146 SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
148 /* unmap and free skbs that haven't been transmitted */
149 for (i = 0; i < SONIC_NUM_TDS; i++) {
150 if(lp->tx_laddr[i]) {
151 dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE);
152 lp->tx_laddr[i] = (dma_addr_t)0;
155 dev_kfree_skb(lp->tx_skb[i]);
156 lp->tx_skb[i] = NULL;
160 /* unmap and free the receive buffers */
161 for (i = 0; i < SONIC_NUM_RRS; i++) {
162 if(lp->rx_laddr[i]) {
163 dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE);
164 lp->rx_laddr[i] = (dma_addr_t)0;
167 dev_kfree_skb(lp->rx_skb[i]);
168 lp->rx_skb[i] = NULL;
175 static void sonic_tx_timeout(struct net_device *dev)
177 struct sonic_local *lp = netdev_priv(dev);
180 * put the Sonic into software-reset mode and
181 * disable all interrupts before releasing DMA buffers
183 SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS);
184 sonic_quiesce(dev, SONIC_CR_ALL);
186 SONIC_WRITE(SONIC_IMR, 0);
187 SONIC_WRITE(SONIC_ISR, 0x7fff);
188 SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
189 /* We could resend the original skbs. Easier to re-initialise. */
190 for (i = 0; i < SONIC_NUM_TDS; i++) {
191 if(lp->tx_laddr[i]) {
192 dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE);
193 lp->tx_laddr[i] = (dma_addr_t)0;
196 dev_kfree_skb(lp->tx_skb[i]);
197 lp->tx_skb[i] = NULL;
200 /* Try to restart the adaptor. */
202 lp->stats.tx_errors++;
203 netif_trans_update(dev); /* prevent tx timeout */
204 netif_wake_queue(dev);
210 * Appends new TD during transmission thus avoiding any TX interrupts
211 * until we run out of TDs.
212 * This routine interacts closely with the ISR in that it may,
214 * reset the status flags of the new TD
215 * set and reset EOL flags
217 * The ISR interacts with this routine in various ways. It may,
219 * test the EOL and status flags of the TDs
221 * Concurrently with all of this, the SONIC is potentially writing to
222 * the status flags of the TDs.
225 static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev)
227 struct sonic_local *lp = netdev_priv(dev);
234 printk("sonic_send_packet: skb=%p, dev=%p\n", skb, dev);
237 if (length < ETH_ZLEN) {
238 if (skb_padto(skb, ETH_ZLEN))
244 * Map the packet data into the logical DMA address space
247 laddr = dma_map_single(lp->device, skb->data, length, DMA_TO_DEVICE);
249 pr_err_ratelimited("%s: failed to map tx DMA buffer.\n", dev->name);
250 dev_kfree_skb_any(skb);
254 spin_lock_irqsave(&lp->lock, flags);
258 sonic_tda_put(dev, entry, SONIC_TD_STATUS, 0); /* clear status */
259 sonic_tda_put(dev, entry, SONIC_TD_FRAG_COUNT, 1); /* single fragment */
260 sonic_tda_put(dev, entry, SONIC_TD_PKTSIZE, length); /* length of packet */
261 sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_L, laddr & 0xffff);
262 sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_H, laddr >> 16);
263 sonic_tda_put(dev, entry, SONIC_TD_FRAG_SIZE, length);
264 sonic_tda_put(dev, entry, SONIC_TD_LINK,
265 sonic_tda_get(dev, entry, SONIC_TD_LINK) | SONIC_EOL);
268 lp->tx_len[entry] = length;
269 lp->tx_laddr[entry] = laddr;
270 lp->tx_skb[entry] = skb;
273 sonic_tda_put(dev, lp->eol_tx, SONIC_TD_LINK,
274 sonic_tda_get(dev, lp->eol_tx, SONIC_TD_LINK) & ~SONIC_EOL);
277 lp->next_tx = (entry + 1) & SONIC_TDS_MASK;
278 if (lp->tx_skb[lp->next_tx] != NULL) {
279 /* The ring is full, the ISR has yet to process the next TD. */
281 printk("%s: stopping queue\n", dev->name);
282 netif_stop_queue(dev);
283 /* after this packet, wait for ISR to free up some TDAs */
284 } else netif_start_queue(dev);
287 printk("sonic_send_packet: issuing Tx command\n");
289 SONIC_WRITE(SONIC_CMD, SONIC_CR_TXP);
291 spin_unlock_irqrestore(&lp->lock, flags);
297 * The typical workload of the driver:
298 * Handle the network interface interrupts.
300 static irqreturn_t sonic_interrupt(int irq, void *dev_id)
302 struct net_device *dev = dev_id;
303 struct sonic_local *lp = netdev_priv(dev);
307 /* The lock has two purposes. Firstly, it synchronizes sonic_interrupt()
308 * with sonic_send_packet() so that the two functions can share state.
309 * Secondly, it makes sonic_interrupt() re-entrant, as that is required
310 * by macsonic which must use two IRQs with different priority levels.
312 spin_lock_irqsave(&lp->lock, flags);
314 status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT;
316 spin_unlock_irqrestore(&lp->lock, flags);
322 if (status & SONIC_INT_PKTRX) {
324 printk("%s: packet rx\n", dev->name);
325 sonic_rx(dev); /* got packet(s) */
326 SONIC_WRITE(SONIC_ISR, SONIC_INT_PKTRX); /* clear the interrupt */
329 if (status & SONIC_INT_TXDN) {
330 int entry = lp->cur_tx;
334 /* The state of a Transmit Descriptor may be inferred
335 * from { tx_skb[entry], td_status } as follows.
336 * { clear, clear } => the TD has never been used
337 * { set, clear } => the TD was handed to SONIC
338 * { set, set } => the TD was handed back
339 * { clear, set } => the TD is available for re-use
343 printk("%s: tx done\n", dev->name);
345 while (lp->tx_skb[entry] != NULL) {
346 if ((td_status = sonic_tda_get(dev, entry, SONIC_TD_STATUS)) == 0)
349 if (td_status & 0x0001) {
350 lp->stats.tx_packets++;
351 lp->stats.tx_bytes += sonic_tda_get(dev, entry, SONIC_TD_PKTSIZE);
353 lp->stats.tx_errors++;
354 if (td_status & 0x0642)
355 lp->stats.tx_aborted_errors++;
356 if (td_status & 0x0180)
357 lp->stats.tx_carrier_errors++;
358 if (td_status & 0x0020)
359 lp->stats.tx_window_errors++;
360 if (td_status & 0x0004)
361 lp->stats.tx_fifo_errors++;
364 /* We must free the original skb */
365 dev_kfree_skb_irq(lp->tx_skb[entry]);
366 lp->tx_skb[entry] = NULL;
367 /* and unmap DMA buffer */
368 dma_unmap_single(lp->device, lp->tx_laddr[entry], lp->tx_len[entry], DMA_TO_DEVICE);
369 lp->tx_laddr[entry] = (dma_addr_t)0;
372 if (sonic_tda_get(dev, entry, SONIC_TD_LINK) & SONIC_EOL) {
373 entry = (entry + 1) & SONIC_TDS_MASK;
376 entry = (entry + 1) & SONIC_TDS_MASK;
379 if (freed_some || lp->tx_skb[entry] == NULL)
380 netif_wake_queue(dev); /* The ring is no longer full */
382 SONIC_WRITE(SONIC_ISR, SONIC_INT_TXDN); /* clear the interrupt */
386 * check error conditions
388 if (status & SONIC_INT_RFO) {
390 printk("%s: rx fifo overrun\n", dev->name);
391 lp->stats.rx_fifo_errors++;
392 SONIC_WRITE(SONIC_ISR, SONIC_INT_RFO); /* clear the interrupt */
394 if (status & SONIC_INT_RDE) {
396 printk("%s: rx descriptors exhausted\n", dev->name);
397 lp->stats.rx_dropped++;
398 SONIC_WRITE(SONIC_ISR, SONIC_INT_RDE); /* clear the interrupt */
400 if (status & SONIC_INT_RBAE) {
402 printk("%s: rx buffer area exceeded\n", dev->name);
403 lp->stats.rx_dropped++;
404 SONIC_WRITE(SONIC_ISR, SONIC_INT_RBAE); /* clear the interrupt */
407 /* counter overruns; all counters are 16bit wide */
408 if (status & SONIC_INT_FAE) {
409 lp->stats.rx_frame_errors += 65536;
410 SONIC_WRITE(SONIC_ISR, SONIC_INT_FAE); /* clear the interrupt */
412 if (status & SONIC_INT_CRC) {
413 lp->stats.rx_crc_errors += 65536;
414 SONIC_WRITE(SONIC_ISR, SONIC_INT_CRC); /* clear the interrupt */
416 if (status & SONIC_INT_MP) {
417 lp->stats.rx_missed_errors += 65536;
418 SONIC_WRITE(SONIC_ISR, SONIC_INT_MP); /* clear the interrupt */
422 if (status & SONIC_INT_TXER) {
423 if ((SONIC_READ(SONIC_TCR) & SONIC_TCR_FU) && (sonic_debug > 2))
424 printk(KERN_ERR "%s: tx fifo underrun\n", dev->name);
425 SONIC_WRITE(SONIC_ISR, SONIC_INT_TXER); /* clear the interrupt */
429 if (status & SONIC_INT_BR) {
430 printk(KERN_ERR "%s: Bus retry occurred! Device interrupt disabled.\n",
432 /* ... to help debug DMA problems causing endless interrupts. */
433 /* Bounce the eth interface to turn on the interrupt again. */
434 SONIC_WRITE(SONIC_IMR, 0);
435 SONIC_WRITE(SONIC_ISR, SONIC_INT_BR); /* clear the interrupt */
439 if (status & SONIC_INT_LCD)
440 SONIC_WRITE(SONIC_ISR, SONIC_INT_LCD); /* clear the interrupt */
442 status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT;
445 spin_unlock_irqrestore(&lp->lock, flags);
450 /* Return the array index corresponding to a given Receive Buffer pointer. */
451 static int index_from_addr(struct sonic_local *lp, dma_addr_t addr,
454 unsigned int i = last;
457 i = (i + 1) & SONIC_RRS_MASK;
458 if (addr == lp->rx_laddr[i])
466 * We have a good packet(s), pass it/them up the network stack.
468 static void sonic_rx(struct net_device *dev)
470 struct sonic_local *lp = netdev_priv(dev);
472 int entry = lp->cur_rx;
474 while (sonic_rda_get(dev, entry, SONIC_RD_IN_USE) == 0) {
475 struct sk_buff *used_skb;
476 struct sk_buff *new_skb;
477 dma_addr_t new_laddr;
482 status = sonic_rda_get(dev, entry, SONIC_RD_STATUS);
483 if (status & SONIC_RCR_PRX) {
484 u32 addr = (sonic_rda_get(dev, entry,
485 SONIC_RD_PKTPTR_H) << 16) |
486 sonic_rda_get(dev, entry, SONIC_RD_PKTPTR_L);
487 int i = index_from_addr(lp, addr, entry);
490 WARN_ONCE(1, "failed to find buffer!\n");
494 /* Malloc up new buffer. */
495 new_skb = netdev_alloc_skb(dev, SONIC_RBSIZE + 2);
496 if (new_skb == NULL) {
497 lp->stats.rx_dropped++;
500 /* provide 16 byte IP header alignment unless DMA requires otherwise */
501 if(SONIC_BUS_SCALE(lp->dma_bitmode) == 2)
502 skb_reserve(new_skb, 2);
504 new_laddr = dma_map_single(lp->device, skb_put(new_skb, SONIC_RBSIZE),
505 SONIC_RBSIZE, DMA_FROM_DEVICE);
507 dev_kfree_skb(new_skb);
508 printk(KERN_ERR "%s: Failed to map rx buffer, dropping packet.\n", dev->name);
509 lp->stats.rx_dropped++;
513 /* now we have a new skb to replace it, pass the used one up the stack */
514 dma_unmap_single(lp->device, lp->rx_laddr[entry], SONIC_RBSIZE, DMA_FROM_DEVICE);
515 used_skb = lp->rx_skb[i];
516 pkt_len = sonic_rda_get(dev, entry, SONIC_RD_PKTLEN);
517 skb_trim(used_skb, pkt_len);
518 used_skb->protocol = eth_type_trans(used_skb, dev);
520 lp->stats.rx_packets++;
521 lp->stats.rx_bytes += pkt_len;
523 /* and insert the new skb */
524 lp->rx_laddr[i] = new_laddr;
525 lp->rx_skb[i] = new_skb;
527 bufadr_l = (unsigned long)new_laddr & 0xffff;
528 bufadr_h = (unsigned long)new_laddr >> 16;
529 sonic_rra_put(dev, i, SONIC_RR_BUFADR_L, bufadr_l);
530 sonic_rra_put(dev, i, SONIC_RR_BUFADR_H, bufadr_h);
532 /* This should only happen, if we enable accepting broken packets. */
533 lp->stats.rx_errors++;
534 if (status & SONIC_RCR_FAER)
535 lp->stats.rx_frame_errors++;
536 if (status & SONIC_RCR_CRCR)
537 lp->stats.rx_crc_errors++;
539 if (status & SONIC_RCR_LPKT) {
541 * this was the last packet out of the current receive buffer
542 * give the buffer back to the SONIC
544 lp->cur_rwp += SIZEOF_SONIC_RR * SONIC_BUS_SCALE(lp->dma_bitmode);
545 if (lp->cur_rwp >= lp->rra_end) lp->cur_rwp = lp->rra_laddr & 0xffff;
546 SONIC_WRITE(SONIC_RWP, lp->cur_rwp);
547 if (SONIC_READ(SONIC_ISR) & SONIC_INT_RBE) {
549 printk("%s: rx buffer exhausted\n", dev->name);
550 SONIC_WRITE(SONIC_ISR, SONIC_INT_RBE); /* clear the flag */
553 printk(KERN_ERR "%s: rx desc without RCR_LPKT. Shouldn't happen !?\n",
556 * give back the descriptor
558 sonic_rda_put(dev, entry, SONIC_RD_LINK,
559 sonic_rda_get(dev, entry, SONIC_RD_LINK) | SONIC_EOL);
560 sonic_rda_put(dev, entry, SONIC_RD_IN_USE, 1);
561 sonic_rda_put(dev, lp->eol_rx, SONIC_RD_LINK,
562 sonic_rda_get(dev, lp->eol_rx, SONIC_RD_LINK) & ~SONIC_EOL);
564 lp->cur_rx = entry = (entry + 1) & SONIC_RDS_MASK;
567 * If any worth-while packets have been received, netif_rx()
568 * has done a mark_bh(NET_BH) for us and will work on them
569 * when we get to the bottom-half routine.
575 * Get the current statistics.
576 * This may be called with the device open or closed.
578 static struct net_device_stats *sonic_get_stats(struct net_device *dev)
580 struct sonic_local *lp = netdev_priv(dev);
582 /* read the tally counter from the SONIC and reset them */
583 lp->stats.rx_crc_errors += SONIC_READ(SONIC_CRCT);
584 SONIC_WRITE(SONIC_CRCT, 0xffff);
585 lp->stats.rx_frame_errors += SONIC_READ(SONIC_FAET);
586 SONIC_WRITE(SONIC_FAET, 0xffff);
587 lp->stats.rx_missed_errors += SONIC_READ(SONIC_MPT);
588 SONIC_WRITE(SONIC_MPT, 0xffff);
595 * Set or clear the multicast filter for this adaptor.
597 static void sonic_multicast_list(struct net_device *dev)
599 struct sonic_local *lp = netdev_priv(dev);
601 struct netdev_hw_addr *ha;
605 rcr = SONIC_READ(SONIC_RCR) & ~(SONIC_RCR_PRO | SONIC_RCR_AMC);
606 rcr |= SONIC_RCR_BRD; /* accept broadcast packets */
608 if (dev->flags & IFF_PROMISC) { /* set promiscuous mode */
609 rcr |= SONIC_RCR_PRO;
611 if ((dev->flags & IFF_ALLMULTI) ||
612 (netdev_mc_count(dev) > 15)) {
613 rcr |= SONIC_RCR_AMC;
616 printk("sonic_multicast_list: mc_count %d\n",
617 netdev_mc_count(dev));
618 sonic_set_cam_enable(dev, 1); /* always enable our own address */
620 netdev_for_each_mc_addr(ha, dev) {
622 sonic_cda_put(dev, i, SONIC_CD_CAP0, addr[1] << 8 | addr[0]);
623 sonic_cda_put(dev, i, SONIC_CD_CAP1, addr[3] << 8 | addr[2]);
624 sonic_cda_put(dev, i, SONIC_CD_CAP2, addr[5] << 8 | addr[4]);
625 sonic_set_cam_enable(dev, sonic_get_cam_enable(dev) | (1 << i));
628 SONIC_WRITE(SONIC_CDC, 16);
629 /* issue Load CAM command */
630 SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff);
631 SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM);
636 printk("sonic_multicast_list: setting RCR=%x\n", rcr);
638 SONIC_WRITE(SONIC_RCR, rcr);
643 * Initialize the SONIC ethernet controller.
645 static int sonic_init(struct net_device *dev)
648 struct sonic_local *lp = netdev_priv(dev);
652 * put the Sonic into software-reset mode and
653 * disable all interrupts
655 SONIC_WRITE(SONIC_IMR, 0);
656 SONIC_WRITE(SONIC_ISR, 0x7fff);
657 SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
660 * clear software reset flag, disable receiver, clear and
661 * enable interrupts, then completely initialize the SONIC
663 SONIC_WRITE(SONIC_CMD, 0);
664 SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS);
665 sonic_quiesce(dev, SONIC_CR_ALL);
668 * initialize the receive resource area
671 printk("sonic_init: initialize receive resource area\n");
673 for (i = 0; i < SONIC_NUM_RRS; i++) {
674 u16 bufadr_l = (unsigned long)lp->rx_laddr[i] & 0xffff;
675 u16 bufadr_h = (unsigned long)lp->rx_laddr[i] >> 16;
676 sonic_rra_put(dev, i, SONIC_RR_BUFADR_L, bufadr_l);
677 sonic_rra_put(dev, i, SONIC_RR_BUFADR_H, bufadr_h);
678 sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_L, SONIC_RBSIZE >> 1);
679 sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_H, 0);
682 /* initialize all RRA registers */
683 lp->rra_end = (lp->rra_laddr + SONIC_NUM_RRS * SIZEOF_SONIC_RR *
684 SONIC_BUS_SCALE(lp->dma_bitmode)) & 0xffff;
685 lp->cur_rwp = (lp->rra_laddr + (SONIC_NUM_RRS - 1) * SIZEOF_SONIC_RR *
686 SONIC_BUS_SCALE(lp->dma_bitmode)) & 0xffff;
688 SONIC_WRITE(SONIC_RSA, lp->rra_laddr & 0xffff);
689 SONIC_WRITE(SONIC_REA, lp->rra_end);
690 SONIC_WRITE(SONIC_RRP, lp->rra_laddr & 0xffff);
691 SONIC_WRITE(SONIC_RWP, lp->cur_rwp);
692 SONIC_WRITE(SONIC_URRA, lp->rra_laddr >> 16);
693 SONIC_WRITE(SONIC_EOBC, (SONIC_RBSIZE >> 1) - (lp->dma_bitmode ? 2 : 1));
695 /* load the resource pointers */
697 printk("sonic_init: issuing RRRA command\n");
699 SONIC_WRITE(SONIC_CMD, SONIC_CR_RRRA);
702 if (SONIC_READ(SONIC_CMD) & SONIC_CR_RRRA)
707 printk("sonic_init: status=%x i=%d\n", SONIC_READ(SONIC_CMD), i);
710 * Initialize the receive descriptors so that they
711 * become a circular linked list, ie. let the last
712 * descriptor point to the first again.
715 printk("sonic_init: initialize receive descriptors\n");
716 for (i=0; i<SONIC_NUM_RDS; i++) {
717 sonic_rda_put(dev, i, SONIC_RD_STATUS, 0);
718 sonic_rda_put(dev, i, SONIC_RD_PKTLEN, 0);
719 sonic_rda_put(dev, i, SONIC_RD_PKTPTR_L, 0);
720 sonic_rda_put(dev, i, SONIC_RD_PKTPTR_H, 0);
721 sonic_rda_put(dev, i, SONIC_RD_SEQNO, 0);
722 sonic_rda_put(dev, i, SONIC_RD_IN_USE, 1);
723 sonic_rda_put(dev, i, SONIC_RD_LINK,
725 ((i+1) * SIZEOF_SONIC_RD * SONIC_BUS_SCALE(lp->dma_bitmode)));
727 /* fix last descriptor */
728 sonic_rda_put(dev, SONIC_NUM_RDS - 1, SONIC_RD_LINK,
729 (lp->rda_laddr & 0xffff) | SONIC_EOL);
730 lp->eol_rx = SONIC_NUM_RDS - 1;
732 SONIC_WRITE(SONIC_URDA, lp->rda_laddr >> 16);
733 SONIC_WRITE(SONIC_CRDA, lp->rda_laddr & 0xffff);
736 * initialize transmit descriptors
739 printk("sonic_init: initialize transmit descriptors\n");
740 for (i = 0; i < SONIC_NUM_TDS; i++) {
741 sonic_tda_put(dev, i, SONIC_TD_STATUS, 0);
742 sonic_tda_put(dev, i, SONIC_TD_CONFIG, 0);
743 sonic_tda_put(dev, i, SONIC_TD_PKTSIZE, 0);
744 sonic_tda_put(dev, i, SONIC_TD_FRAG_COUNT, 0);
745 sonic_tda_put(dev, i, SONIC_TD_LINK,
746 (lp->tda_laddr & 0xffff) +
747 (i + 1) * SIZEOF_SONIC_TD * SONIC_BUS_SCALE(lp->dma_bitmode));
748 lp->tx_skb[i] = NULL;
750 /* fix last descriptor */
751 sonic_tda_put(dev, SONIC_NUM_TDS - 1, SONIC_TD_LINK,
752 (lp->tda_laddr & 0xffff));
754 SONIC_WRITE(SONIC_UTDA, lp->tda_laddr >> 16);
755 SONIC_WRITE(SONIC_CTDA, lp->tda_laddr & 0xffff);
756 lp->cur_tx = lp->next_tx = 0;
757 lp->eol_tx = SONIC_NUM_TDS - 1;
760 * put our own address to CAM desc[0]
762 sonic_cda_put(dev, 0, SONIC_CD_CAP0, dev->dev_addr[1] << 8 | dev->dev_addr[0]);
763 sonic_cda_put(dev, 0, SONIC_CD_CAP1, dev->dev_addr[3] << 8 | dev->dev_addr[2]);
764 sonic_cda_put(dev, 0, SONIC_CD_CAP2, dev->dev_addr[5] << 8 | dev->dev_addr[4]);
765 sonic_set_cam_enable(dev, 1);
767 for (i = 0; i < 16; i++)
768 sonic_cda_put(dev, i, SONIC_CD_ENTRY_POINTER, i);
771 * initialize CAM registers
773 SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff);
774 SONIC_WRITE(SONIC_CDC, 16);
779 SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM);
783 if (SONIC_READ(SONIC_ISR) & SONIC_INT_LCD)
786 if (sonic_debug > 2) {
787 printk("sonic_init: CMD=%x, ISR=%x\n, i=%d",
788 SONIC_READ(SONIC_CMD), SONIC_READ(SONIC_ISR), i);
792 * enable receiver, disable loopback
793 * and enable all interrupts
795 SONIC_WRITE(SONIC_CMD, SONIC_CR_RXEN | SONIC_CR_STP);
796 SONIC_WRITE(SONIC_RCR, SONIC_RCR_DEFAULT);
797 SONIC_WRITE(SONIC_TCR, SONIC_TCR_DEFAULT);
798 SONIC_WRITE(SONIC_ISR, 0x7fff);
799 SONIC_WRITE(SONIC_IMR, SONIC_IMR_DEFAULT);
801 cmd = SONIC_READ(SONIC_CMD);
802 if ((cmd & SONIC_CR_RXEN) == 0 || (cmd & SONIC_CR_STP) == 0)
803 printk(KERN_ERR "sonic_init: failed, status=%x\n", cmd);
806 printk("sonic_init: new status=%x\n",
807 SONIC_READ(SONIC_CMD));
812 MODULE_LICENSE("GPL");