2 * Network device driver for the MACE ethernet controller on
3 * Apple Powermacs. Assumes it's under a DBDMA controller.
5 * Copyright (C) 1996 Paul Mackerras.
8 #include <linux/module.h>
9 #include <linux/kernel.h>
10 #include <linux/netdevice.h>
11 #include <linux/etherdevice.h>
12 #include <linux/delay.h>
13 #include <linux/string.h>
14 #include <linux/timer.h>
15 #include <linux/init.h>
16 #include <linux/crc32.h>
17 #include <linux/spinlock.h>
18 #include <linux/bitrev.h>
20 #include <asm/dbdma.h>
22 #include <asm/pgtable.h>
23 #include <asm/macio.h>
27 static int port_aaui = -1;
31 #define MAX_TX_ACTIVE 1
32 #define NCMDS_TX 1 /* dma commands per element in tx ring */
33 #define RX_BUFLEN (ETH_FRAME_LEN + 8)
34 #define TX_TIMEOUT HZ /* 1 second */
36 /* Chip rev needs workaround on HW & multicast addr change */
37 #define BROKEN_ADDRCHG_REV 0x0941
39 /* Bits in transmit DMA status */
40 #define TX_DMA_ERR 0x80
43 volatile struct mace __iomem *mace;
44 volatile struct dbdma_regs __iomem *tx_dma;
46 volatile struct dbdma_regs __iomem *rx_dma;
48 volatile struct dbdma_cmd *tx_cmds; /* xmit dma command list */
49 volatile struct dbdma_cmd *rx_cmds; /* recv dma command list */
50 struct sk_buff *rx_bufs[N_RX_RING];
53 struct sk_buff *tx_bufs[N_TX_RING];
57 unsigned char tx_fullup;
58 unsigned char tx_active;
59 unsigned char tx_bad_runt;
60 struct timer_list tx_timeout;
64 struct macio_dev *mdev;
69 * Number of bytes of private data per MACE: allow enough for
70 * the rx and tx dma commands plus a branch dma command each,
71 * and another 16 bytes to allow us to align the dma command
72 * buffers on a 16 byte boundary.
74 #define PRIV_BYTES (sizeof(struct mace_data) \
75 + (N_RX_RING + NCMDS_TX * N_TX_RING + 3) * sizeof(struct dbdma_cmd))
77 static int mace_open(struct net_device *dev);
78 static int mace_close(struct net_device *dev);
79 static int mace_xmit_start(struct sk_buff *skb, struct net_device *dev);
80 static void mace_set_multicast(struct net_device *dev);
81 static void mace_reset(struct net_device *dev);
82 static int mace_set_address(struct net_device *dev, void *addr);
83 static irqreturn_t mace_interrupt(int irq, void *dev_id);
84 static irqreturn_t mace_txdma_intr(int irq, void *dev_id);
85 static irqreturn_t mace_rxdma_intr(int irq, void *dev_id);
86 static void mace_set_timeout(struct net_device *dev);
87 static void mace_tx_timeout(unsigned long data);
88 static inline void dbdma_reset(volatile struct dbdma_regs __iomem *dma);
89 static inline void mace_clean_rings(struct mace_data *mp);
90 static void __mace_set_address(struct net_device *dev, void *addr);
93 * If we can't get a skbuff when we need it, we use this area for DMA.
95 static unsigned char *dummy_buf;
97 static int __devinit mace_probe(struct macio_dev *mdev, const struct of_device_id *match)
99 struct device_node *mace = macio_get_of_node(mdev);
100 struct net_device *dev;
101 struct mace_data *mp;
102 const unsigned char *addr;
103 int j, rev, rc = -EBUSY;
105 if (macio_resource_count(mdev) != 3 || macio_irq_count(mdev) != 3) {
106 printk(KERN_ERR "can't use MACE %s: need 3 addrs and 3 irqs\n",
111 addr = of_get_property(mace, "mac-address", NULL);
113 addr = of_get_property(mace, "local-mac-address", NULL);
115 printk(KERN_ERR "Can't get mac-address for MACE %s\n",
122 * lazy allocate the driver-wide dummy buffer. (Note that we
123 * never have more than one MACE in the system anyway)
125 if (dummy_buf == NULL) {
126 dummy_buf = kmalloc(RX_BUFLEN+2, GFP_KERNEL);
127 if (dummy_buf == NULL) {
128 printk(KERN_ERR "MACE: couldn't allocate dummy buffer\n");
133 if (macio_request_resources(mdev, "mace")) {
134 printk(KERN_ERR "MACE: can't request IO resources !\n");
138 dev = alloc_etherdev(PRIV_BYTES);
140 printk(KERN_ERR "MACE: can't allocate ethernet device !\n");
144 SET_NETDEV_DEV(dev, &mdev->ofdev.dev);
146 mp = netdev_priv(dev);
148 macio_set_drvdata(mdev, dev);
150 dev->base_addr = macio_resource_start(mdev, 0);
151 mp->mace = ioremap(dev->base_addr, 0x1000);
152 if (mp->mace == NULL) {
153 printk(KERN_ERR "MACE: can't map IO resources !\n");
157 dev->irq = macio_irq(mdev, 0);
159 rev = addr[0] == 0 && addr[1] == 0xA0;
160 for (j = 0; j < 6; ++j) {
161 dev->dev_addr[j] = rev ? bitrev8(addr[j]): addr[j];
163 mp->chipid = (in_8(&mp->mace->chipid_hi) << 8) |
164 in_8(&mp->mace->chipid_lo);
167 mp = netdev_priv(dev);
168 mp->maccc = ENXMT | ENRCV;
170 mp->tx_dma = ioremap(macio_resource_start(mdev, 1), 0x1000);
171 if (mp->tx_dma == NULL) {
172 printk(KERN_ERR "MACE: can't map TX DMA resources !\n");
176 mp->tx_dma_intr = macio_irq(mdev, 1);
178 mp->rx_dma = ioremap(macio_resource_start(mdev, 2), 0x1000);
179 if (mp->rx_dma == NULL) {
180 printk(KERN_ERR "MACE: can't map RX DMA resources !\n");
182 goto err_unmap_tx_dma;
184 mp->rx_dma_intr = macio_irq(mdev, 2);
186 mp->tx_cmds = (volatile struct dbdma_cmd *) DBDMA_ALIGN(mp + 1);
187 mp->rx_cmds = mp->tx_cmds + NCMDS_TX * N_TX_RING + 1;
189 memset((char *) mp->tx_cmds, 0,
190 (NCMDS_TX*N_TX_RING + N_RX_RING + 2) * sizeof(struct dbdma_cmd));
191 init_timer(&mp->tx_timeout);
192 spin_lock_init(&mp->lock);
193 mp->timeout_active = 0;
196 mp->port_aaui = port_aaui;
198 /* Apple Network Server uses the AAUI port */
199 if (machine_is_compatible("AAPL,ShinerESB"))
202 #ifdef CONFIG_MACE_AAUI_PORT
210 dev->open = mace_open;
211 dev->stop = mace_close;
212 dev->hard_start_xmit = mace_xmit_start;
213 dev->set_multicast_list = mace_set_multicast;
214 dev->set_mac_address = mace_set_address;
217 * Most of what is below could be moved to mace_open()
221 rc = request_irq(dev->irq, mace_interrupt, 0, "MACE", dev);
223 printk(KERN_ERR "MACE: can't get irq %d\n", dev->irq);
224 goto err_unmap_rx_dma;
226 rc = request_irq(mp->tx_dma_intr, mace_txdma_intr, 0, "MACE-txdma", dev);
228 printk(KERN_ERR "MACE: can't get irq %d\n", mp->tx_dma_intr);
231 rc = request_irq(mp->rx_dma_intr, mace_rxdma_intr, 0, "MACE-rxdma", dev);
233 printk(KERN_ERR "MACE: can't get irq %d\n", mp->rx_dma_intr);
234 goto err_free_tx_irq;
237 rc = register_netdev(dev);
239 printk(KERN_ERR "MACE: Cannot register net device, aborting.\n");
240 goto err_free_rx_irq;
243 printk(KERN_INFO "%s: MACE at %pM, chip revision %d.%d\n",
244 dev->name, dev->dev_addr,
245 mp->chipid >> 8, mp->chipid & 0xff);
250 free_irq(macio_irq(mdev, 2), dev);
252 free_irq(macio_irq(mdev, 1), dev);
254 free_irq(macio_irq(mdev, 0), dev);
264 macio_release_resources(mdev);
269 static int __devexit mace_remove(struct macio_dev *mdev)
271 struct net_device *dev = macio_get_drvdata(mdev);
272 struct mace_data *mp;
276 macio_set_drvdata(mdev, NULL);
278 mp = netdev_priv(dev);
280 unregister_netdev(dev);
282 free_irq(dev->irq, dev);
283 free_irq(mp->tx_dma_intr, dev);
284 free_irq(mp->rx_dma_intr, dev);
292 macio_release_resources(mdev);
297 static void dbdma_reset(volatile struct dbdma_regs __iomem *dma)
301 out_le32(&dma->control, (WAKE|FLUSH|PAUSE|RUN) << 16);
304 * Yes this looks peculiar, but apparently it needs to be this
305 * way on some machines.
307 for (i = 200; i > 0; --i)
308 if (ld_le32(&dma->control) & RUN)
312 static void mace_reset(struct net_device *dev)
314 struct mace_data *mp = netdev_priv(dev);
315 volatile struct mace __iomem *mb = mp->mace;
318 /* soft-reset the chip */
321 out_8(&mb->biucc, SWRST);
322 if (in_8(&mb->biucc) & SWRST) {
329 printk(KERN_ERR "mace: cannot reset chip!\n");
333 out_8(&mb->imr, 0xff); /* disable all intrs for now */
335 out_8(&mb->maccc, 0); /* turn off tx, rx */
337 out_8(&mb->biucc, XMTSP_64);
338 out_8(&mb->utr, RTRD);
339 out_8(&mb->fifocc, RCVFW_32 | XMTFW_16 | XMTFWU | RCVFWU | XMTBRST);
340 out_8(&mb->xmtfc, AUTO_PAD_XMIT); /* auto-pad short frames */
341 out_8(&mb->rcvfc, 0);
343 /* load up the hardware address */
344 __mace_set_address(dev, dev->dev_addr);
346 /* clear the multicast filter */
347 if (mp->chipid == BROKEN_ADDRCHG_REV)
348 out_8(&mb->iac, LOGADDR);
350 out_8(&mb->iac, ADDRCHG | LOGADDR);
351 while ((in_8(&mb->iac) & ADDRCHG) != 0)
354 for (i = 0; i < 8; ++i)
355 out_8(&mb->ladrf, 0);
357 /* done changing address */
358 if (mp->chipid != BROKEN_ADDRCHG_REV)
362 out_8(&mb->plscc, PORTSEL_AUI + ENPLSIO);
364 out_8(&mb->plscc, PORTSEL_GPSI + ENPLSIO);
367 static void __mace_set_address(struct net_device *dev, void *addr)
369 struct mace_data *mp = netdev_priv(dev);
370 volatile struct mace __iomem *mb = mp->mace;
371 unsigned char *p = addr;
374 /* load up the hardware address */
375 if (mp->chipid == BROKEN_ADDRCHG_REV)
376 out_8(&mb->iac, PHYADDR);
378 out_8(&mb->iac, ADDRCHG | PHYADDR);
379 while ((in_8(&mb->iac) & ADDRCHG) != 0)
382 for (i = 0; i < 6; ++i)
383 out_8(&mb->padr, dev->dev_addr[i] = p[i]);
384 if (mp->chipid != BROKEN_ADDRCHG_REV)
388 static int mace_set_address(struct net_device *dev, void *addr)
390 struct mace_data *mp = netdev_priv(dev);
391 volatile struct mace __iomem *mb = mp->mace;
394 spin_lock_irqsave(&mp->lock, flags);
396 __mace_set_address(dev, addr);
398 /* note: setting ADDRCHG clears ENRCV */
399 out_8(&mb->maccc, mp->maccc);
401 spin_unlock_irqrestore(&mp->lock, flags);
405 static inline void mace_clean_rings(struct mace_data *mp)
409 /* free some skb's */
410 for (i = 0; i < N_RX_RING; ++i) {
411 if (mp->rx_bufs[i] != NULL) {
412 dev_kfree_skb(mp->rx_bufs[i]);
413 mp->rx_bufs[i] = NULL;
416 for (i = mp->tx_empty; i != mp->tx_fill; ) {
417 dev_kfree_skb(mp->tx_bufs[i]);
418 if (++i >= N_TX_RING)
423 static int mace_open(struct net_device *dev)
425 struct mace_data *mp = netdev_priv(dev);
426 volatile struct mace __iomem *mb = mp->mace;
427 volatile struct dbdma_regs __iomem *rd = mp->rx_dma;
428 volatile struct dbdma_regs __iomem *td = mp->tx_dma;
429 volatile struct dbdma_cmd *cp;
437 /* initialize list of sk_buffs for receiving and set up recv dma */
438 mace_clean_rings(mp);
439 memset((char *)mp->rx_cmds, 0, N_RX_RING * sizeof(struct dbdma_cmd));
441 for (i = 0; i < N_RX_RING - 1; ++i) {
442 skb = dev_alloc_skb(RX_BUFLEN + 2);
446 skb_reserve(skb, 2); /* so IP header lands on 4-byte bdry */
449 mp->rx_bufs[i] = skb;
450 st_le16(&cp->req_count, RX_BUFLEN);
451 st_le16(&cp->command, INPUT_LAST + INTR_ALWAYS);
452 st_le32(&cp->phy_addr, virt_to_bus(data));
456 mp->rx_bufs[i] = NULL;
457 st_le16(&cp->command, DBDMA_STOP);
461 /* Put a branch back to the beginning of the receive command list */
463 st_le16(&cp->command, DBDMA_NOP + BR_ALWAYS);
464 st_le32(&cp->cmd_dep, virt_to_bus(mp->rx_cmds));
467 out_le32(&rd->control, (RUN|PAUSE|FLUSH|WAKE) << 16); /* clear run bit */
468 out_le32(&rd->cmdptr, virt_to_bus(mp->rx_cmds));
469 out_le32(&rd->control, (RUN << 16) | RUN);
471 /* put a branch at the end of the tx command list */
472 cp = mp->tx_cmds + NCMDS_TX * N_TX_RING;
473 st_le16(&cp->command, DBDMA_NOP + BR_ALWAYS);
474 st_le32(&cp->cmd_dep, virt_to_bus(mp->tx_cmds));
477 out_le32(&td->control, (RUN|PAUSE|FLUSH|WAKE) << 16);
478 out_le32(&td->cmdptr, virt_to_bus(mp->tx_cmds));
486 out_8(&mb->maccc, mp->maccc);
487 /* enable all interrupts except receive interrupts */
488 out_8(&mb->imr, RCVINT);
493 static int mace_close(struct net_device *dev)
495 struct mace_data *mp = netdev_priv(dev);
496 volatile struct mace __iomem *mb = mp->mace;
497 volatile struct dbdma_regs __iomem *rd = mp->rx_dma;
498 volatile struct dbdma_regs __iomem *td = mp->tx_dma;
500 /* disable rx and tx */
501 out_8(&mb->maccc, 0);
502 out_8(&mb->imr, 0xff); /* disable all intrs */
504 /* disable rx and tx dma */
505 st_le32(&rd->control, (RUN|PAUSE|FLUSH|WAKE) << 16); /* clear run bit */
506 st_le32(&td->control, (RUN|PAUSE|FLUSH|WAKE) << 16); /* clear run bit */
508 mace_clean_rings(mp);
513 static inline void mace_set_timeout(struct net_device *dev)
515 struct mace_data *mp = netdev_priv(dev);
517 if (mp->timeout_active)
518 del_timer(&mp->tx_timeout);
519 mp->tx_timeout.expires = jiffies + TX_TIMEOUT;
520 mp->tx_timeout.function = mace_tx_timeout;
521 mp->tx_timeout.data = (unsigned long) dev;
522 add_timer(&mp->tx_timeout);
523 mp->timeout_active = 1;
526 static int mace_xmit_start(struct sk_buff *skb, struct net_device *dev)
528 struct mace_data *mp = netdev_priv(dev);
529 volatile struct dbdma_regs __iomem *td = mp->tx_dma;
530 volatile struct dbdma_cmd *cp, *np;
534 /* see if there's a free slot in the tx ring */
535 spin_lock_irqsave(&mp->lock, flags);
538 if (next >= N_TX_RING)
540 if (next == mp->tx_empty) {
541 netif_stop_queue(dev);
543 spin_unlock_irqrestore(&mp->lock, flags);
544 return 1; /* can't take it at the moment */
546 spin_unlock_irqrestore(&mp->lock, flags);
548 /* partially fill in the dma command block */
550 if (len > ETH_FRAME_LEN) {
551 printk(KERN_DEBUG "mace: xmit frame too long (%d)\n", len);
554 mp->tx_bufs[fill] = skb;
555 cp = mp->tx_cmds + NCMDS_TX * fill;
556 st_le16(&cp->req_count, len);
557 st_le32(&cp->phy_addr, virt_to_bus(skb->data));
559 np = mp->tx_cmds + NCMDS_TX * next;
560 out_le16(&np->command, DBDMA_STOP);
562 /* poke the tx dma channel */
563 spin_lock_irqsave(&mp->lock, flags);
565 if (!mp->tx_bad_runt && mp->tx_active < MAX_TX_ACTIVE) {
566 out_le16(&cp->xfer_status, 0);
567 out_le16(&cp->command, OUTPUT_LAST);
568 out_le32(&td->control, ((RUN|WAKE) << 16) + (RUN|WAKE));
570 mace_set_timeout(dev);
572 if (++next >= N_TX_RING)
574 if (next == mp->tx_empty)
575 netif_stop_queue(dev);
576 spin_unlock_irqrestore(&mp->lock, flags);
581 static void mace_set_multicast(struct net_device *dev)
583 struct mace_data *mp = netdev_priv(dev);
584 volatile struct mace __iomem *mb = mp->mace;
589 spin_lock_irqsave(&mp->lock, flags);
591 if (dev->flags & IFF_PROMISC) {
594 unsigned char multicast_filter[8];
595 struct dev_mc_list *dmi = dev->mc_list;
597 if (dev->flags & IFF_ALLMULTI) {
598 for (i = 0; i < 8; i++)
599 multicast_filter[i] = 0xff;
601 for (i = 0; i < 8; i++)
602 multicast_filter[i] = 0;
603 for (i = 0; i < dev->mc_count; i++) {
604 crc = ether_crc_le(6, dmi->dmi_addr);
605 j = crc >> 26; /* bit number in multicast_filter */
606 multicast_filter[j >> 3] |= 1 << (j & 7);
611 printk("Multicast filter :");
612 for (i = 0; i < 8; i++)
613 printk("%02x ", multicast_filter[i]);
617 if (mp->chipid == BROKEN_ADDRCHG_REV)
618 out_8(&mb->iac, LOGADDR);
620 out_8(&mb->iac, ADDRCHG | LOGADDR);
621 while ((in_8(&mb->iac) & ADDRCHG) != 0)
624 for (i = 0; i < 8; ++i)
625 out_8(&mb->ladrf, multicast_filter[i]);
626 if (mp->chipid != BROKEN_ADDRCHG_REV)
630 out_8(&mb->maccc, mp->maccc);
631 spin_unlock_irqrestore(&mp->lock, flags);
634 static void mace_handle_misc_intrs(struct mace_data *mp, int intr, struct net_device *dev)
636 volatile struct mace __iomem *mb = mp->mace;
637 static int mace_babbles, mace_jabbers;
640 dev->stats.rx_missed_errors += 256;
641 dev->stats.rx_missed_errors += in_8(&mb->mpc); /* reading clears it */
643 dev->stats.rx_length_errors += 256;
644 dev->stats.rx_length_errors += in_8(&mb->rntpc); /* reading clears it */
646 ++dev->stats.tx_heartbeat_errors;
648 if (mace_babbles++ < 4)
649 printk(KERN_DEBUG "mace: babbling transmitter\n");
651 if (mace_jabbers++ < 4)
652 printk(KERN_DEBUG "mace: jabbering transceiver\n");
655 static irqreturn_t mace_interrupt(int irq, void *dev_id)
657 struct net_device *dev = (struct net_device *) dev_id;
658 struct mace_data *mp = netdev_priv(dev);
659 volatile struct mace __iomem *mb = mp->mace;
660 volatile struct dbdma_regs __iomem *td = mp->tx_dma;
661 volatile struct dbdma_cmd *cp;
662 int intr, fs, i, stat, x;
665 /* static int mace_last_fs, mace_last_xcount; */
667 spin_lock_irqsave(&mp->lock, flags);
668 intr = in_8(&mb->ir); /* read interrupt register */
669 in_8(&mb->xmtrc); /* get retries */
670 mace_handle_misc_intrs(mp, intr, dev);
673 while (in_8(&mb->pr) & XMTSV) {
674 del_timer(&mp->tx_timeout);
675 mp->timeout_active = 0;
677 * Clear any interrupt indication associated with this status
678 * word. This appears to unlatch any error indication from
679 * the DMA controller.
681 intr = in_8(&mb->ir);
683 mace_handle_misc_intrs(mp, intr, dev);
684 if (mp->tx_bad_runt) {
685 fs = in_8(&mb->xmtfs);
687 out_8(&mb->xmtfc, AUTO_PAD_XMIT);
690 dstat = ld_le32(&td->status);
691 /* stop DMA controller */
692 out_le32(&td->control, RUN << 16);
694 * xcount is the number of complete frames which have been
695 * written to the fifo but for which status has not been read.
697 xcount = (in_8(&mb->fifofc) >> XMTFC_SH) & XMTFC_MASK;
698 if (xcount == 0 || (dstat & DEAD)) {
700 * If a packet was aborted before the DMA controller has
701 * finished transferring it, it seems that there are 2 bytes
702 * which are stuck in some buffer somewhere. These will get
703 * transmitted as soon as we read the frame status (which
704 * reenables the transmit data transfer request). Turning
705 * off the DMA controller and/or resetting the MACE doesn't
706 * help. So we disable auto-padding and FCS transmission
707 * so the two bytes will only be a runt packet which should
708 * be ignored by other stations.
710 out_8(&mb->xmtfc, DXMTFCS);
712 fs = in_8(&mb->xmtfs);
713 if ((fs & XMTSV) == 0) {
714 printk(KERN_ERR "mace: xmtfs not valid! (fs=%x xc=%d ds=%x)\n",
718 * XXX mace likes to hang the machine after a xmtfs error.
719 * This is hard to reproduce, reseting *may* help
722 cp = mp->tx_cmds + NCMDS_TX * i;
723 stat = ld_le16(&cp->xfer_status);
724 if ((fs & (UFLO|LCOL|LCAR|RTRY)) || (dstat & DEAD) || xcount == 0) {
726 * Check whether there were in fact 2 bytes written to
730 x = (in_8(&mb->fifofc) >> XMTFC_SH) & XMTFC_MASK;
732 /* there were two bytes with an end-of-packet indication */
734 mace_set_timeout(dev);
737 * Either there weren't the two bytes buffered up, or they
738 * didn't have an end-of-packet indication.
739 * We flush the transmit FIFO just in case (by setting the
740 * XMTFWU bit with the transmitter disabled).
742 out_8(&mb->maccc, in_8(&mb->maccc) & ~ENXMT);
743 out_8(&mb->fifocc, in_8(&mb->fifocc) | XMTFWU);
745 out_8(&mb->maccc, in_8(&mb->maccc) | ENXMT);
746 out_8(&mb->xmtfc, AUTO_PAD_XMIT);
749 /* dma should have finished */
750 if (i == mp->tx_fill) {
751 printk(KERN_DEBUG "mace: tx ring ran out? (fs=%x xc=%d ds=%x)\n",
756 if (fs & (UFLO|LCOL|LCAR|RTRY)) {
757 ++dev->stats.tx_errors;
759 ++dev->stats.tx_carrier_errors;
760 if (fs & (UFLO|LCOL|RTRY))
761 ++dev->stats.tx_aborted_errors;
763 dev->stats.tx_bytes += mp->tx_bufs[i]->len;
764 ++dev->stats.tx_packets;
766 dev_kfree_skb_irq(mp->tx_bufs[i]);
768 if (++i >= N_TX_RING)
772 mace_last_xcount = xcount;
776 if (i != mp->tx_empty) {
778 netif_wake_queue(dev);
784 if (!mp->tx_bad_runt && i != mp->tx_fill && mp->tx_active < MAX_TX_ACTIVE) {
786 /* set up the next one */
787 cp = mp->tx_cmds + NCMDS_TX * i;
788 out_le16(&cp->xfer_status, 0);
789 out_le16(&cp->command, OUTPUT_LAST);
791 if (++i >= N_TX_RING)
793 } while (i != mp->tx_fill && mp->tx_active < MAX_TX_ACTIVE);
794 out_le32(&td->control, ((RUN|WAKE) << 16) + (RUN|WAKE));
795 mace_set_timeout(dev);
797 spin_unlock_irqrestore(&mp->lock, flags);
801 static void mace_tx_timeout(unsigned long data)
803 struct net_device *dev = (struct net_device *) data;
804 struct mace_data *mp = netdev_priv(dev);
805 volatile struct mace __iomem *mb = mp->mace;
806 volatile struct dbdma_regs __iomem *td = mp->tx_dma;
807 volatile struct dbdma_regs __iomem *rd = mp->rx_dma;
808 volatile struct dbdma_cmd *cp;
812 spin_lock_irqsave(&mp->lock, flags);
813 mp->timeout_active = 0;
814 if (mp->tx_active == 0 && !mp->tx_bad_runt)
817 /* update various counters */
818 mace_handle_misc_intrs(mp, in_8(&mb->ir), dev);
820 cp = mp->tx_cmds + NCMDS_TX * mp->tx_empty;
822 /* turn off both tx and rx and reset the chip */
823 out_8(&mb->maccc, 0);
824 printk(KERN_ERR "mace: transmit timeout - resetting\n");
829 cp = bus_to_virt(ld_le32(&rd->cmdptr));
831 out_le16(&cp->xfer_status, 0);
832 out_le32(&rd->cmdptr, virt_to_bus(cp));
833 out_le32(&rd->control, (RUN << 16) | RUN);
835 /* fix up the transmit side */
838 ++dev->stats.tx_errors;
839 if (mp->tx_bad_runt) {
841 } else if (i != mp->tx_fill) {
842 dev_kfree_skb(mp->tx_bufs[i]);
843 if (++i >= N_TX_RING)
848 netif_wake_queue(dev);
849 if (i != mp->tx_fill) {
850 cp = mp->tx_cmds + NCMDS_TX * i;
851 out_le16(&cp->xfer_status, 0);
852 out_le16(&cp->command, OUTPUT_LAST);
853 out_le32(&td->cmdptr, virt_to_bus(cp));
854 out_le32(&td->control, (RUN << 16) | RUN);
856 mace_set_timeout(dev);
859 /* turn it back on */
860 out_8(&mb->imr, RCVINT);
861 out_8(&mb->maccc, mp->maccc);
864 spin_unlock_irqrestore(&mp->lock, flags);
867 static irqreturn_t mace_txdma_intr(int irq, void *dev_id)
872 static irqreturn_t mace_rxdma_intr(int irq, void *dev_id)
874 struct net_device *dev = (struct net_device *) dev_id;
875 struct mace_data *mp = netdev_priv(dev);
876 volatile struct dbdma_regs __iomem *rd = mp->rx_dma;
877 volatile struct dbdma_cmd *cp, *np;
878 int i, nb, stat, next;
880 unsigned frame_status;
881 static int mace_lost_status;
885 spin_lock_irqsave(&mp->lock, flags);
886 for (i = mp->rx_empty; i != mp->rx_fill; ) {
887 cp = mp->rx_cmds + i;
888 stat = ld_le16(&cp->xfer_status);
889 if ((stat & ACTIVE) == 0) {
891 if (next >= N_RX_RING)
893 np = mp->rx_cmds + next;
894 if (next != mp->rx_fill
895 && (ld_le16(&np->xfer_status) & ACTIVE) != 0) {
896 printk(KERN_DEBUG "mace: lost a status word\n");
901 nb = ld_le16(&cp->req_count) - ld_le16(&cp->res_count);
902 out_le16(&cp->command, DBDMA_STOP);
903 /* got a packet, have a look at it */
904 skb = mp->rx_bufs[i];
906 ++dev->stats.rx_dropped;
909 frame_status = (data[nb-3] << 8) + data[nb-4];
910 if (frame_status & (RS_OFLO|RS_CLSN|RS_FRAMERR|RS_FCSERR)) {
911 ++dev->stats.rx_errors;
912 if (frame_status & RS_OFLO)
913 ++dev->stats.rx_over_errors;
914 if (frame_status & RS_FRAMERR)
915 ++dev->stats.rx_frame_errors;
916 if (frame_status & RS_FCSERR)
917 ++dev->stats.rx_crc_errors;
919 /* Mace feature AUTO_STRIP_RCV is on by default, dropping the
920 * FCS on frames with 802.3 headers. This means that Ethernet
921 * frames have 8 extra octets at the end, while 802.3 frames
922 * have only 4. We need to correctly account for this. */
923 if (*(unsigned short *)(data+12) < 1536) /* 802.3 header */
925 else /* Ethernet header; mace includes FCS */
928 skb->protocol = eth_type_trans(skb, dev);
929 dev->stats.rx_bytes += skb->len;
931 mp->rx_bufs[i] = NULL;
932 ++dev->stats.rx_packets;
935 ++dev->stats.rx_errors;
936 ++dev->stats.rx_length_errors;
939 /* advance to next */
940 if (++i >= N_RX_RING)
948 if (next >= N_RX_RING)
950 if (next == mp->rx_empty)
952 cp = mp->rx_cmds + i;
953 skb = mp->rx_bufs[i];
955 skb = dev_alloc_skb(RX_BUFLEN + 2);
958 mp->rx_bufs[i] = skb;
961 st_le16(&cp->req_count, RX_BUFLEN);
962 data = skb? skb->data: dummy_buf;
963 st_le32(&cp->phy_addr, virt_to_bus(data));
964 out_le16(&cp->xfer_status, 0);
965 out_le16(&cp->command, INPUT_LAST + INTR_ALWAYS);
967 if ((ld_le32(&rd->status) & ACTIVE) != 0) {
968 out_le32(&rd->control, (PAUSE << 16) | PAUSE);
969 while ((in_le32(&rd->status) & ACTIVE) != 0)
975 if (i != mp->rx_fill) {
976 out_le32(&rd->control, ((RUN|WAKE) << 16) | (RUN|WAKE));
979 spin_unlock_irqrestore(&mp->lock, flags);
983 static struct of_device_id mace_match[] =
990 MODULE_DEVICE_TABLE (of, mace_match);
992 static struct macio_driver mace_driver =
995 .match_table = mace_match,
997 .remove = mace_remove,
1001 static int __init mace_init(void)
1003 return macio_register_driver(&mace_driver);
1006 static void __exit mace_cleanup(void)
1008 macio_unregister_driver(&mace_driver);
1014 MODULE_AUTHOR("Paul Mackerras");
1015 MODULE_DESCRIPTION("PowerMac MACE driver.");
1016 module_param(port_aaui, int, 0);
1017 MODULE_PARM_DESC(port_aaui, "MACE uses AAUI port (0-1)");
1018 MODULE_LICENSE("GPL");
1020 module_init(mace_init);
1021 module_exit(mace_cleanup);