1 // SPDX-License-Identifier: GPL-2.0-only
7 * Converted to DMA API, added zero-copy buffer handling, and
8 * (from the mac68k project) introduced dhd's support for 16-bit cards.
10 * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
12 * This driver is based on work from Andreas Busse, but most of
13 * the code is rewritten.
15 * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
17 * Core code included by system sonic drivers
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
23 * (C) 1999 David Huggins-Daines <dhd@debian.org>
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.
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".
37 static unsigned int version_printed;
39 static int sonic_debug = -1;
40 module_param(sonic_debug, int, 0);
41 MODULE_PARM_DESC(sonic_debug, "debug message level");
43 static void sonic_msg_init(struct net_device *dev)
45 struct sonic_local *lp = netdev_priv(dev);
47 lp->msg_enable = netif_msg_init(sonic_debug, 0);
49 if (version_printed++ == 0)
50 netif_dbg(lp, drv, dev, "%s", version);
54 * Open/initialize the SONIC controller.
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.
60 static int sonic_open(struct net_device *dev)
62 struct sonic_local *lp = netdev_priv(dev);
65 netif_dbg(lp, ifup, dev, "%s: initializing sonic driver\n", __func__);
67 spin_lock_init(&lp->lock);
69 for (i = 0; i < SONIC_NUM_RRS; i++) {
70 struct sk_buff *skb = netdev_alloc_skb(dev, SONIC_RBSIZE + 2);
72 while(i > 0) { /* free any that were allocated successfully */
74 dev_kfree_skb(lp->rx_skb[i]);
77 printk(KERN_ERR "%s: couldn't allocate receive buffers\n",
81 /* align IP header unless DMA requires otherwise */
82 if (SONIC_BUS_SCALE(lp->dma_bitmode) == 2)
87 for (i = 0; i < SONIC_NUM_RRS; i++) {
88 dma_addr_t laddr = dma_map_single(lp->device, skb_put(lp->rx_skb[i], SONIC_RBSIZE),
89 SONIC_RBSIZE, DMA_FROM_DEVICE);
90 if (dma_mapping_error(lp->device, laddr)) {
91 while(i > 0) { /* free any that were mapped successfully */
93 dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE);
94 lp->rx_laddr[i] = (dma_addr_t)0;
96 for (i = 0; i < SONIC_NUM_RRS; i++) {
97 dev_kfree_skb(lp->rx_skb[i]);
100 printk(KERN_ERR "%s: couldn't map rx DMA buffers\n",
104 lp->rx_laddr[i] = laddr;
108 * Initialize the SONIC
112 netif_start_queue(dev);
114 netif_dbg(lp, ifup, dev, "%s: Initialization done\n", __func__);
119 /* Wait for the SONIC to become idle. */
120 static void sonic_quiesce(struct net_device *dev, u16 mask)
122 struct sonic_local * __maybe_unused lp = netdev_priv(dev);
126 for (i = 0; i < 1000; ++i) {
127 bits = SONIC_READ(SONIC_CMD) & mask;
130 if (irqs_disabled() || in_interrupt())
133 usleep_range(100, 200);
135 WARN_ONCE(1, "command deadline expired! 0x%04x\n", bits);
139 * Close the SONIC device
141 static int sonic_close(struct net_device *dev)
143 struct sonic_local *lp = netdev_priv(dev);
146 netif_dbg(lp, ifdown, dev, "%s\n", __func__);
148 netif_stop_queue(dev);
151 * stop the SONIC, disable interrupts
153 SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS);
154 sonic_quiesce(dev, SONIC_CR_ALL);
156 SONIC_WRITE(SONIC_IMR, 0);
157 SONIC_WRITE(SONIC_ISR, 0x7fff);
158 SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
160 /* unmap and free skbs that haven't been transmitted */
161 for (i = 0; i < SONIC_NUM_TDS; i++) {
162 if(lp->tx_laddr[i]) {
163 dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE);
164 lp->tx_laddr[i] = (dma_addr_t)0;
167 dev_kfree_skb(lp->tx_skb[i]);
168 lp->tx_skb[i] = NULL;
172 /* unmap and free the receive buffers */
173 for (i = 0; i < SONIC_NUM_RRS; i++) {
174 if(lp->rx_laddr[i]) {
175 dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE);
176 lp->rx_laddr[i] = (dma_addr_t)0;
179 dev_kfree_skb(lp->rx_skb[i]);
180 lp->rx_skb[i] = NULL;
187 static void sonic_tx_timeout(struct net_device *dev)
189 struct sonic_local *lp = netdev_priv(dev);
192 * put the Sonic into software-reset mode and
193 * disable all interrupts before releasing DMA buffers
195 SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS);
196 sonic_quiesce(dev, SONIC_CR_ALL);
198 SONIC_WRITE(SONIC_IMR, 0);
199 SONIC_WRITE(SONIC_ISR, 0x7fff);
200 SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
201 /* We could resend the original skbs. Easier to re-initialise. */
202 for (i = 0; i < SONIC_NUM_TDS; i++) {
203 if(lp->tx_laddr[i]) {
204 dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE);
205 lp->tx_laddr[i] = (dma_addr_t)0;
208 dev_kfree_skb(lp->tx_skb[i]);
209 lp->tx_skb[i] = NULL;
212 /* Try to restart the adaptor. */
214 lp->stats.tx_errors++;
215 netif_trans_update(dev); /* prevent tx timeout */
216 netif_wake_queue(dev);
222 * Appends new TD during transmission thus avoiding any TX interrupts
223 * until we run out of TDs.
224 * This routine interacts closely with the ISR in that it may,
226 * reset the status flags of the new TD
227 * set and reset EOL flags
229 * The ISR interacts with this routine in various ways. It may,
231 * test the EOL and status flags of the TDs
233 * Concurrently with all of this, the SONIC is potentially writing to
234 * the status flags of the TDs.
237 static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev)
239 struct sonic_local *lp = netdev_priv(dev);
245 netif_dbg(lp, tx_queued, dev, "%s: skb=%p\n", __func__, skb);
248 if (length < ETH_ZLEN) {
249 if (skb_padto(skb, ETH_ZLEN))
255 * Map the packet data into the logical DMA address space
258 laddr = dma_map_single(lp->device, skb->data, length, DMA_TO_DEVICE);
260 pr_err_ratelimited("%s: failed to map tx DMA buffer.\n", dev->name);
261 dev_kfree_skb_any(skb);
265 spin_lock_irqsave(&lp->lock, flags);
269 sonic_tda_put(dev, entry, SONIC_TD_STATUS, 0); /* clear status */
270 sonic_tda_put(dev, entry, SONIC_TD_FRAG_COUNT, 1); /* single fragment */
271 sonic_tda_put(dev, entry, SONIC_TD_PKTSIZE, length); /* length of packet */
272 sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_L, laddr & 0xffff);
273 sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_H, laddr >> 16);
274 sonic_tda_put(dev, entry, SONIC_TD_FRAG_SIZE, length);
275 sonic_tda_put(dev, entry, SONIC_TD_LINK,
276 sonic_tda_get(dev, entry, SONIC_TD_LINK) | SONIC_EOL);
279 lp->tx_len[entry] = length;
280 lp->tx_laddr[entry] = laddr;
281 lp->tx_skb[entry] = skb;
284 sonic_tda_put(dev, lp->eol_tx, SONIC_TD_LINK,
285 sonic_tda_get(dev, lp->eol_tx, SONIC_TD_LINK) & ~SONIC_EOL);
288 lp->next_tx = (entry + 1) & SONIC_TDS_MASK;
289 if (lp->tx_skb[lp->next_tx] != NULL) {
290 /* The ring is full, the ISR has yet to process the next TD. */
291 netif_dbg(lp, tx_queued, dev, "%s: stopping queue\n", __func__);
292 netif_stop_queue(dev);
293 /* after this packet, wait for ISR to free up some TDAs */
294 } else netif_start_queue(dev);
296 netif_dbg(lp, tx_queued, dev, "%s: issuing Tx command\n", __func__);
298 SONIC_WRITE(SONIC_CMD, SONIC_CR_TXP);
300 spin_unlock_irqrestore(&lp->lock, flags);
306 * The typical workload of the driver:
307 * Handle the network interface interrupts.
309 static irqreturn_t sonic_interrupt(int irq, void *dev_id)
311 struct net_device *dev = dev_id;
312 struct sonic_local *lp = netdev_priv(dev);
316 /* The lock has two purposes. Firstly, it synchronizes sonic_interrupt()
317 * with sonic_send_packet() so that the two functions can share state.
318 * Secondly, it makes sonic_interrupt() re-entrant, as that is required
319 * by macsonic which must use two IRQs with different priority levels.
321 spin_lock_irqsave(&lp->lock, flags);
323 status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT;
325 spin_unlock_irqrestore(&lp->lock, flags);
331 SONIC_WRITE(SONIC_ISR, status); /* clear the interrupt(s) */
333 if (status & SONIC_INT_PKTRX) {
334 netif_dbg(lp, intr, dev, "%s: packet rx\n", __func__);
335 sonic_rx(dev); /* got packet(s) */
338 if (status & SONIC_INT_TXDN) {
339 int entry = lp->cur_tx;
343 /* The state of a Transmit Descriptor may be inferred
344 * from { tx_skb[entry], td_status } as follows.
345 * { clear, clear } => the TD has never been used
346 * { set, clear } => the TD was handed to SONIC
347 * { set, set } => the TD was handed back
348 * { clear, set } => the TD is available for re-use
351 netif_dbg(lp, intr, dev, "%s: tx done\n", __func__);
353 while (lp->tx_skb[entry] != NULL) {
354 if ((td_status = sonic_tda_get(dev, entry, SONIC_TD_STATUS)) == 0)
357 if (td_status & SONIC_TCR_PTX) {
358 lp->stats.tx_packets++;
359 lp->stats.tx_bytes += sonic_tda_get(dev, entry, SONIC_TD_PKTSIZE);
361 if (td_status & (SONIC_TCR_EXD |
362 SONIC_TCR_EXC | SONIC_TCR_BCM))
363 lp->stats.tx_aborted_errors++;
365 (SONIC_TCR_NCRS | SONIC_TCR_CRLS))
366 lp->stats.tx_carrier_errors++;
367 if (td_status & SONIC_TCR_OWC)
368 lp->stats.tx_window_errors++;
369 if (td_status & SONIC_TCR_FU)
370 lp->stats.tx_fifo_errors++;
373 /* We must free the original skb */
374 dev_consume_skb_irq(lp->tx_skb[entry]);
375 lp->tx_skb[entry] = NULL;
376 /* and unmap DMA buffer */
377 dma_unmap_single(lp->device, lp->tx_laddr[entry], lp->tx_len[entry], DMA_TO_DEVICE);
378 lp->tx_laddr[entry] = (dma_addr_t)0;
381 if (sonic_tda_get(dev, entry, SONIC_TD_LINK) & SONIC_EOL) {
382 entry = (entry + 1) & SONIC_TDS_MASK;
385 entry = (entry + 1) & SONIC_TDS_MASK;
388 if (freed_some || lp->tx_skb[entry] == NULL)
389 netif_wake_queue(dev); /* The ring is no longer full */
394 * check error conditions
396 if (status & SONIC_INT_RFO) {
397 netif_dbg(lp, rx_err, dev, "%s: rx fifo overrun\n",
400 if (status & SONIC_INT_RDE) {
401 netif_dbg(lp, rx_err, dev, "%s: rx descriptors exhausted\n",
404 if (status & SONIC_INT_RBAE) {
405 netif_dbg(lp, rx_err, dev, "%s: rx buffer area exceeded\n",
409 /* counter overruns; all counters are 16bit wide */
410 if (status & SONIC_INT_FAE)
411 lp->stats.rx_frame_errors += 65536;
412 if (status & SONIC_INT_CRC)
413 lp->stats.rx_crc_errors += 65536;
414 if (status & SONIC_INT_MP)
415 lp->stats.rx_missed_errors += 65536;
418 if (status & SONIC_INT_TXER)
419 if (SONIC_READ(SONIC_TCR) & SONIC_TCR_FU)
420 netif_dbg(lp, tx_err, dev, "%s: tx fifo underrun\n",
424 if (status & SONIC_INT_BR) {
425 printk(KERN_ERR "%s: Bus retry occurred! Device interrupt disabled.\n",
427 /* ... to help debug DMA problems causing endless interrupts. */
428 /* Bounce the eth interface to turn on the interrupt again. */
429 SONIC_WRITE(SONIC_IMR, 0);
432 status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT;
435 spin_unlock_irqrestore(&lp->lock, flags);
440 /* Return the array index corresponding to a given Receive Buffer pointer. */
441 static int index_from_addr(struct sonic_local *lp, dma_addr_t addr,
444 unsigned int i = last;
447 i = (i + 1) & SONIC_RRS_MASK;
448 if (addr == lp->rx_laddr[i])
455 /* Allocate and map a new skb to be used as a receive buffer. */
456 static bool sonic_alloc_rb(struct net_device *dev, struct sonic_local *lp,
457 struct sk_buff **new_skb, dma_addr_t *new_addr)
459 *new_skb = netdev_alloc_skb(dev, SONIC_RBSIZE + 2);
463 if (SONIC_BUS_SCALE(lp->dma_bitmode) == 2)
464 skb_reserve(*new_skb, 2);
466 *new_addr = dma_map_single(lp->device, skb_put(*new_skb, SONIC_RBSIZE),
467 SONIC_RBSIZE, DMA_FROM_DEVICE);
469 dev_kfree_skb(*new_skb);
477 /* Place a new receive resource in the Receive Resource Area and update RWP. */
478 static void sonic_update_rra(struct net_device *dev, struct sonic_local *lp,
479 dma_addr_t old_addr, dma_addr_t new_addr)
481 unsigned int entry = sonic_rr_entry(dev, SONIC_READ(SONIC_RWP));
482 unsigned int end = sonic_rr_entry(dev, SONIC_READ(SONIC_RRP));
485 /* The resources in the range [RRP, RWP) belong to the SONIC. This loop
486 * scans the other resources in the RRA, those in the range [RWP, RRP).
489 buf = (sonic_rra_get(dev, entry, SONIC_RR_BUFADR_H) << 16) |
490 sonic_rra_get(dev, entry, SONIC_RR_BUFADR_L);
495 entry = (entry + 1) & SONIC_RRS_MASK;
496 } while (entry != end);
498 WARN_ONCE(buf != old_addr, "failed to find resource!\n");
500 sonic_rra_put(dev, entry, SONIC_RR_BUFADR_H, new_addr >> 16);
501 sonic_rra_put(dev, entry, SONIC_RR_BUFADR_L, new_addr & 0xffff);
503 entry = (entry + 1) & SONIC_RRS_MASK;
505 SONIC_WRITE(SONIC_RWP, sonic_rr_addr(dev, entry));
509 * We have a good packet(s), pass it/them up the network stack.
511 static void sonic_rx(struct net_device *dev)
513 struct sonic_local *lp = netdev_priv(dev);
514 int entry = lp->cur_rx;
515 int prev_entry = lp->eol_rx;
518 while (sonic_rda_get(dev, entry, SONIC_RD_IN_USE) == 0) {
519 u16 status = sonic_rda_get(dev, entry, SONIC_RD_STATUS);
521 /* If the RD has LPKT set, the chip has finished with the RB */
522 if ((status & SONIC_RCR_PRX) && (status & SONIC_RCR_LPKT)) {
523 struct sk_buff *new_skb;
524 dma_addr_t new_laddr;
525 u32 addr = (sonic_rda_get(dev, entry,
526 SONIC_RD_PKTPTR_H) << 16) |
527 sonic_rda_get(dev, entry, SONIC_RD_PKTPTR_L);
528 int i = index_from_addr(lp, addr, entry);
531 WARN_ONCE(1, "failed to find buffer!\n");
535 if (sonic_alloc_rb(dev, lp, &new_skb, &new_laddr)) {
536 struct sk_buff *used_skb = lp->rx_skb[i];
539 /* Pass the used buffer up the stack */
540 dma_unmap_single(lp->device, addr, SONIC_RBSIZE,
543 pkt_len = sonic_rda_get(dev, entry,
545 skb_trim(used_skb, pkt_len);
546 used_skb->protocol = eth_type_trans(used_skb,
549 lp->stats.rx_packets++;
550 lp->stats.rx_bytes += pkt_len;
552 lp->rx_skb[i] = new_skb;
553 lp->rx_laddr[i] = new_laddr;
555 /* Failed to obtain a new buffer so re-use it */
557 lp->stats.rx_dropped++;
559 /* If RBE is already asserted when RWP advances then
560 * it's safe to clear RBE after processing this packet.
562 rbe = rbe || SONIC_READ(SONIC_ISR) & SONIC_INT_RBE;
563 sonic_update_rra(dev, lp, addr, new_laddr);
566 * give back the descriptor
568 sonic_rda_put(dev, entry, SONIC_RD_STATUS, 0);
569 sonic_rda_put(dev, entry, SONIC_RD_IN_USE, 1);
572 entry = (entry + 1) & SONIC_RDS_MASK;
577 if (prev_entry != lp->eol_rx) {
578 /* Advance the EOL flag to put descriptors back into service */
579 sonic_rda_put(dev, prev_entry, SONIC_RD_LINK, SONIC_EOL |
580 sonic_rda_get(dev, prev_entry, SONIC_RD_LINK));
581 sonic_rda_put(dev, lp->eol_rx, SONIC_RD_LINK, ~SONIC_EOL &
582 sonic_rda_get(dev, lp->eol_rx, SONIC_RD_LINK));
583 lp->eol_rx = prev_entry;
587 SONIC_WRITE(SONIC_ISR, SONIC_INT_RBE);
589 * If any worth-while packets have been received, netif_rx()
590 * has done a mark_bh(NET_BH) for us and will work on them
591 * when we get to the bottom-half routine.
597 * Get the current statistics.
598 * This may be called with the device open or closed.
600 static struct net_device_stats *sonic_get_stats(struct net_device *dev)
602 struct sonic_local *lp = netdev_priv(dev);
604 /* read the tally counter from the SONIC and reset them */
605 lp->stats.rx_crc_errors += SONIC_READ(SONIC_CRCT);
606 SONIC_WRITE(SONIC_CRCT, 0xffff);
607 lp->stats.rx_frame_errors += SONIC_READ(SONIC_FAET);
608 SONIC_WRITE(SONIC_FAET, 0xffff);
609 lp->stats.rx_missed_errors += SONIC_READ(SONIC_MPT);
610 SONIC_WRITE(SONIC_MPT, 0xffff);
617 * Set or clear the multicast filter for this adaptor.
619 static void sonic_multicast_list(struct net_device *dev)
621 struct sonic_local *lp = netdev_priv(dev);
623 struct netdev_hw_addr *ha;
627 rcr = SONIC_READ(SONIC_RCR) & ~(SONIC_RCR_PRO | SONIC_RCR_AMC);
628 rcr |= SONIC_RCR_BRD; /* accept broadcast packets */
630 if (dev->flags & IFF_PROMISC) { /* set promiscuous mode */
631 rcr |= SONIC_RCR_PRO;
633 if ((dev->flags & IFF_ALLMULTI) ||
634 (netdev_mc_count(dev) > 15)) {
635 rcr |= SONIC_RCR_AMC;
639 netif_dbg(lp, ifup, dev, "%s: mc_count %d\n", __func__,
640 netdev_mc_count(dev));
641 sonic_set_cam_enable(dev, 1); /* always enable our own address */
643 netdev_for_each_mc_addr(ha, dev) {
645 sonic_cda_put(dev, i, SONIC_CD_CAP0, addr[1] << 8 | addr[0]);
646 sonic_cda_put(dev, i, SONIC_CD_CAP1, addr[3] << 8 | addr[2]);
647 sonic_cda_put(dev, i, SONIC_CD_CAP2, addr[5] << 8 | addr[4]);
648 sonic_set_cam_enable(dev, sonic_get_cam_enable(dev) | (1 << i));
651 SONIC_WRITE(SONIC_CDC, 16);
652 SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff);
654 /* LCAM and TXP commands can't be used simultaneously */
655 spin_lock_irqsave(&lp->lock, flags);
656 sonic_quiesce(dev, SONIC_CR_TXP);
657 SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM);
658 sonic_quiesce(dev, SONIC_CR_LCAM);
659 spin_unlock_irqrestore(&lp->lock, flags);
663 netif_dbg(lp, ifup, dev, "%s: setting RCR=%x\n", __func__, rcr);
665 SONIC_WRITE(SONIC_RCR, rcr);
670 * Initialize the SONIC ethernet controller.
672 static int sonic_init(struct net_device *dev)
674 struct sonic_local *lp = netdev_priv(dev);
678 * put the Sonic into software-reset mode and
679 * disable all interrupts
681 SONIC_WRITE(SONIC_IMR, 0);
682 SONIC_WRITE(SONIC_ISR, 0x7fff);
683 SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
685 /* While in reset mode, clear CAM Enable register */
686 SONIC_WRITE(SONIC_CE, 0);
689 * clear software reset flag, disable receiver, clear and
690 * enable interrupts, then completely initialize the SONIC
692 SONIC_WRITE(SONIC_CMD, 0);
693 SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS | SONIC_CR_STP);
694 sonic_quiesce(dev, SONIC_CR_ALL);
697 * initialize the receive resource area
699 netif_dbg(lp, ifup, dev, "%s: initialize receive resource area\n",
702 for (i = 0; i < SONIC_NUM_RRS; i++) {
703 u16 bufadr_l = (unsigned long)lp->rx_laddr[i] & 0xffff;
704 u16 bufadr_h = (unsigned long)lp->rx_laddr[i] >> 16;
705 sonic_rra_put(dev, i, SONIC_RR_BUFADR_L, bufadr_l);
706 sonic_rra_put(dev, i, SONIC_RR_BUFADR_H, bufadr_h);
707 sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_L, SONIC_RBSIZE >> 1);
708 sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_H, 0);
711 /* initialize all RRA registers */
712 SONIC_WRITE(SONIC_RSA, sonic_rr_addr(dev, 0));
713 SONIC_WRITE(SONIC_REA, sonic_rr_addr(dev, SONIC_NUM_RRS));
714 SONIC_WRITE(SONIC_RRP, sonic_rr_addr(dev, 0));
715 SONIC_WRITE(SONIC_RWP, sonic_rr_addr(dev, SONIC_NUM_RRS - 1));
716 SONIC_WRITE(SONIC_URRA, lp->rra_laddr >> 16);
717 SONIC_WRITE(SONIC_EOBC, (SONIC_RBSIZE >> 1) - (lp->dma_bitmode ? 2 : 1));
719 /* load the resource pointers */
720 netif_dbg(lp, ifup, dev, "%s: issuing RRRA command\n", __func__);
722 SONIC_WRITE(SONIC_CMD, SONIC_CR_RRRA);
723 sonic_quiesce(dev, SONIC_CR_RRRA);
726 * Initialize the receive descriptors so that they
727 * become a circular linked list, ie. let the last
728 * descriptor point to the first again.
730 netif_dbg(lp, ifup, dev, "%s: initialize receive descriptors\n",
733 for (i=0; i<SONIC_NUM_RDS; i++) {
734 sonic_rda_put(dev, i, SONIC_RD_STATUS, 0);
735 sonic_rda_put(dev, i, SONIC_RD_PKTLEN, 0);
736 sonic_rda_put(dev, i, SONIC_RD_PKTPTR_L, 0);
737 sonic_rda_put(dev, i, SONIC_RD_PKTPTR_H, 0);
738 sonic_rda_put(dev, i, SONIC_RD_SEQNO, 0);
739 sonic_rda_put(dev, i, SONIC_RD_IN_USE, 1);
740 sonic_rda_put(dev, i, SONIC_RD_LINK,
742 ((i+1) * SIZEOF_SONIC_RD * SONIC_BUS_SCALE(lp->dma_bitmode)));
744 /* fix last descriptor */
745 sonic_rda_put(dev, SONIC_NUM_RDS - 1, SONIC_RD_LINK,
746 (lp->rda_laddr & 0xffff) | SONIC_EOL);
747 lp->eol_rx = SONIC_NUM_RDS - 1;
749 SONIC_WRITE(SONIC_URDA, lp->rda_laddr >> 16);
750 SONIC_WRITE(SONIC_CRDA, lp->rda_laddr & 0xffff);
753 * initialize transmit descriptors
755 netif_dbg(lp, ifup, dev, "%s: initialize transmit descriptors\n",
758 for (i = 0; i < SONIC_NUM_TDS; i++) {
759 sonic_tda_put(dev, i, SONIC_TD_STATUS, 0);
760 sonic_tda_put(dev, i, SONIC_TD_CONFIG, 0);
761 sonic_tda_put(dev, i, SONIC_TD_PKTSIZE, 0);
762 sonic_tda_put(dev, i, SONIC_TD_FRAG_COUNT, 0);
763 sonic_tda_put(dev, i, SONIC_TD_LINK,
764 (lp->tda_laddr & 0xffff) +
765 (i + 1) * SIZEOF_SONIC_TD * SONIC_BUS_SCALE(lp->dma_bitmode));
766 lp->tx_skb[i] = NULL;
768 /* fix last descriptor */
769 sonic_tda_put(dev, SONIC_NUM_TDS - 1, SONIC_TD_LINK,
770 (lp->tda_laddr & 0xffff));
772 SONIC_WRITE(SONIC_UTDA, lp->tda_laddr >> 16);
773 SONIC_WRITE(SONIC_CTDA, lp->tda_laddr & 0xffff);
774 lp->cur_tx = lp->next_tx = 0;
775 lp->eol_tx = SONIC_NUM_TDS - 1;
778 * put our own address to CAM desc[0]
780 sonic_cda_put(dev, 0, SONIC_CD_CAP0, dev->dev_addr[1] << 8 | dev->dev_addr[0]);
781 sonic_cda_put(dev, 0, SONIC_CD_CAP1, dev->dev_addr[3] << 8 | dev->dev_addr[2]);
782 sonic_cda_put(dev, 0, SONIC_CD_CAP2, dev->dev_addr[5] << 8 | dev->dev_addr[4]);
783 sonic_set_cam_enable(dev, 1);
785 for (i = 0; i < 16; i++)
786 sonic_cda_put(dev, i, SONIC_CD_ENTRY_POINTER, i);
789 * initialize CAM registers
791 SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff);
792 SONIC_WRITE(SONIC_CDC, 16);
797 SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM);
798 sonic_quiesce(dev, SONIC_CR_LCAM);
801 * enable receiver, disable loopback
802 * and enable all interrupts
804 SONIC_WRITE(SONIC_RCR, SONIC_RCR_DEFAULT);
805 SONIC_WRITE(SONIC_TCR, SONIC_TCR_DEFAULT);
806 SONIC_WRITE(SONIC_ISR, 0x7fff);
807 SONIC_WRITE(SONIC_IMR, SONIC_IMR_DEFAULT);
808 SONIC_WRITE(SONIC_CMD, SONIC_CR_RXEN);
810 netif_dbg(lp, ifup, dev, "%s: new status=%x\n", __func__,
811 SONIC_READ(SONIC_CMD));
816 MODULE_LICENSE("GPL");