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 net_device_stats stats;
61 struct timer_list tx_timeout;
65 struct macio_dev *mdev;
70 * Number of bytes of private data per MACE: allow enough for
71 * the rx and tx dma commands plus a branch dma command each,
72 * and another 16 bytes to allow us to align the dma command
73 * buffers on a 16 byte boundary.
75 #define PRIV_BYTES (sizeof(struct mace_data) \
76 + (N_RX_RING + NCMDS_TX * N_TX_RING + 3) * sizeof(struct dbdma_cmd))
78 static int mace_open(struct net_device *dev);
79 static int mace_close(struct net_device *dev);
80 static int mace_xmit_start(struct sk_buff *skb, struct net_device *dev);
81 static struct net_device_stats *mace_stats(struct net_device *dev);
82 static void mace_set_multicast(struct net_device *dev);
83 static void mace_reset(struct net_device *dev);
84 static int mace_set_address(struct net_device *dev, void *addr);
85 static irqreturn_t mace_interrupt(int irq, void *dev_id);
86 static irqreturn_t mace_txdma_intr(int irq, void *dev_id);
87 static irqreturn_t mace_rxdma_intr(int irq, void *dev_id);
88 static void mace_set_timeout(struct net_device *dev);
89 static void mace_tx_timeout(unsigned long data);
90 static inline void dbdma_reset(volatile struct dbdma_regs __iomem *dma);
91 static inline void mace_clean_rings(struct mace_data *mp);
92 static void __mace_set_address(struct net_device *dev, void *addr);
95 * If we can't get a skbuff when we need it, we use this area for DMA.
97 static unsigned char *dummy_buf;
99 static int __devinit mace_probe(struct macio_dev *mdev, const struct of_device_id *match)
101 struct device_node *mace = macio_get_of_node(mdev);
102 struct net_device *dev;
103 struct mace_data *mp;
104 const unsigned char *addr;
105 int j, rev, rc = -EBUSY;
107 if (macio_resource_count(mdev) != 3 || macio_irq_count(mdev) != 3) {
108 printk(KERN_ERR "can't use MACE %s: need 3 addrs and 3 irqs\n",
113 addr = get_property(mace, "mac-address", NULL);
115 addr = get_property(mace, "local-mac-address", NULL);
117 printk(KERN_ERR "Can't get mac-address for MACE %s\n",
124 * lazy allocate the driver-wide dummy buffer. (Note that we
125 * never have more than one MACE in the system anyway)
127 if (dummy_buf == NULL) {
128 dummy_buf = kmalloc(RX_BUFLEN+2, GFP_KERNEL);
129 if (dummy_buf == NULL) {
130 printk(KERN_ERR "MACE: couldn't allocate dummy buffer\n");
135 if (macio_request_resources(mdev, "mace")) {
136 printk(KERN_ERR "MACE: can't request IO resources !\n");
140 dev = alloc_etherdev(PRIV_BYTES);
142 printk(KERN_ERR "MACE: can't allocate ethernet device !\n");
146 SET_MODULE_OWNER(dev);
147 SET_NETDEV_DEV(dev, &mdev->ofdev.dev);
151 macio_set_drvdata(mdev, dev);
153 dev->base_addr = macio_resource_start(mdev, 0);
154 mp->mace = ioremap(dev->base_addr, 0x1000);
155 if (mp->mace == NULL) {
156 printk(KERN_ERR "MACE: can't map IO resources !\n");
160 dev->irq = macio_irq(mdev, 0);
162 rev = addr[0] == 0 && addr[1] == 0xA0;
163 for (j = 0; j < 6; ++j) {
164 dev->dev_addr[j] = rev ? bitrev8(addr[j]): addr[j];
166 mp->chipid = (in_8(&mp->mace->chipid_hi) << 8) |
167 in_8(&mp->mace->chipid_lo);
170 mp = (struct mace_data *) dev->priv;
171 mp->maccc = ENXMT | ENRCV;
173 mp->tx_dma = ioremap(macio_resource_start(mdev, 1), 0x1000);
174 if (mp->tx_dma == NULL) {
175 printk(KERN_ERR "MACE: can't map TX DMA resources !\n");
179 mp->tx_dma_intr = macio_irq(mdev, 1);
181 mp->rx_dma = ioremap(macio_resource_start(mdev, 2), 0x1000);
182 if (mp->rx_dma == NULL) {
183 printk(KERN_ERR "MACE: can't map RX DMA resources !\n");
185 goto err_unmap_tx_dma;
187 mp->rx_dma_intr = macio_irq(mdev, 2);
189 mp->tx_cmds = (volatile struct dbdma_cmd *) DBDMA_ALIGN(mp + 1);
190 mp->rx_cmds = mp->tx_cmds + NCMDS_TX * N_TX_RING + 1;
192 memset(&mp->stats, 0, sizeof(mp->stats));
193 memset((char *) mp->tx_cmds, 0,
194 (NCMDS_TX*N_TX_RING + N_RX_RING + 2) * sizeof(struct dbdma_cmd));
195 init_timer(&mp->tx_timeout);
196 spin_lock_init(&mp->lock);
197 mp->timeout_active = 0;
200 mp->port_aaui = port_aaui;
202 /* Apple Network Server uses the AAUI port */
203 if (machine_is_compatible("AAPL,ShinerESB"))
206 #ifdef CONFIG_MACE_AAUI_PORT
214 dev->open = mace_open;
215 dev->stop = mace_close;
216 dev->hard_start_xmit = mace_xmit_start;
217 dev->get_stats = mace_stats;
218 dev->set_multicast_list = mace_set_multicast;
219 dev->set_mac_address = mace_set_address;
222 * Most of what is below could be moved to mace_open()
226 rc = request_irq(dev->irq, mace_interrupt, 0, "MACE", dev);
228 printk(KERN_ERR "MACE: can't get irq %d\n", dev->irq);
229 goto err_unmap_rx_dma;
231 rc = request_irq(mp->tx_dma_intr, mace_txdma_intr, 0, "MACE-txdma", dev);
233 printk(KERN_ERR "MACE: can't get irq %d\n", mp->tx_dma_intr);
236 rc = request_irq(mp->rx_dma_intr, mace_rxdma_intr, 0, "MACE-rxdma", dev);
238 printk(KERN_ERR "MACE: can't get irq %d\n", mp->rx_dma_intr);
239 goto err_free_tx_irq;
242 rc = register_netdev(dev);
244 printk(KERN_ERR "MACE: Cannot register net device, aborting.\n");
245 goto err_free_rx_irq;
248 printk(KERN_INFO "%s: MACE at", dev->name);
249 for (j = 0; j < 6; ++j) {
250 printk("%c%.2x", (j? ':': ' '), dev->dev_addr[j]);
252 printk(", chip revision %d.%d\n", mp->chipid >> 8, mp->chipid & 0xff);
257 free_irq(macio_irq(mdev, 2), dev);
259 free_irq(macio_irq(mdev, 1), dev);
261 free_irq(macio_irq(mdev, 0), dev);
271 macio_release_resources(mdev);
276 static int __devexit mace_remove(struct macio_dev *mdev)
278 struct net_device *dev = macio_get_drvdata(mdev);
279 struct mace_data *mp;
283 macio_set_drvdata(mdev, NULL);
287 unregister_netdev(dev);
289 free_irq(dev->irq, dev);
290 free_irq(mp->tx_dma_intr, dev);
291 free_irq(mp->rx_dma_intr, dev);
299 macio_release_resources(mdev);
304 static void dbdma_reset(volatile struct dbdma_regs __iomem *dma)
308 out_le32(&dma->control, (WAKE|FLUSH|PAUSE|RUN) << 16);
311 * Yes this looks peculiar, but apparently it needs to be this
312 * way on some machines.
314 for (i = 200; i > 0; --i)
315 if (ld_le32(&dma->control) & RUN)
319 static void mace_reset(struct net_device *dev)
321 struct mace_data *mp = (struct mace_data *) dev->priv;
322 volatile struct mace __iomem *mb = mp->mace;
325 /* soft-reset the chip */
328 out_8(&mb->biucc, SWRST);
329 if (in_8(&mb->biucc) & SWRST) {
336 printk(KERN_ERR "mace: cannot reset chip!\n");
340 out_8(&mb->imr, 0xff); /* disable all intrs for now */
342 out_8(&mb->maccc, 0); /* turn off tx, rx */
344 out_8(&mb->biucc, XMTSP_64);
345 out_8(&mb->utr, RTRD);
346 out_8(&mb->fifocc, RCVFW_32 | XMTFW_16 | XMTFWU | RCVFWU | XMTBRST);
347 out_8(&mb->xmtfc, AUTO_PAD_XMIT); /* auto-pad short frames */
348 out_8(&mb->rcvfc, 0);
350 /* load up the hardware address */
351 __mace_set_address(dev, dev->dev_addr);
353 /* clear the multicast filter */
354 if (mp->chipid == BROKEN_ADDRCHG_REV)
355 out_8(&mb->iac, LOGADDR);
357 out_8(&mb->iac, ADDRCHG | LOGADDR);
358 while ((in_8(&mb->iac) & ADDRCHG) != 0)
361 for (i = 0; i < 8; ++i)
362 out_8(&mb->ladrf, 0);
364 /* done changing address */
365 if (mp->chipid != BROKEN_ADDRCHG_REV)
369 out_8(&mb->plscc, PORTSEL_AUI + ENPLSIO);
371 out_8(&mb->plscc, PORTSEL_GPSI + ENPLSIO);
374 static void __mace_set_address(struct net_device *dev, void *addr)
376 struct mace_data *mp = (struct mace_data *) dev->priv;
377 volatile struct mace __iomem *mb = mp->mace;
378 unsigned char *p = addr;
381 /* load up the hardware address */
382 if (mp->chipid == BROKEN_ADDRCHG_REV)
383 out_8(&mb->iac, PHYADDR);
385 out_8(&mb->iac, ADDRCHG | PHYADDR);
386 while ((in_8(&mb->iac) & ADDRCHG) != 0)
389 for (i = 0; i < 6; ++i)
390 out_8(&mb->padr, dev->dev_addr[i] = p[i]);
391 if (mp->chipid != BROKEN_ADDRCHG_REV)
395 static int mace_set_address(struct net_device *dev, void *addr)
397 struct mace_data *mp = (struct mace_data *) dev->priv;
398 volatile struct mace __iomem *mb = mp->mace;
401 spin_lock_irqsave(&mp->lock, flags);
403 __mace_set_address(dev, addr);
405 /* note: setting ADDRCHG clears ENRCV */
406 out_8(&mb->maccc, mp->maccc);
408 spin_unlock_irqrestore(&mp->lock, flags);
412 static inline void mace_clean_rings(struct mace_data *mp)
416 /* free some skb's */
417 for (i = 0; i < N_RX_RING; ++i) {
418 if (mp->rx_bufs[i] != 0) {
419 dev_kfree_skb(mp->rx_bufs[i]);
420 mp->rx_bufs[i] = NULL;
423 for (i = mp->tx_empty; i != mp->tx_fill; ) {
424 dev_kfree_skb(mp->tx_bufs[i]);
425 if (++i >= N_TX_RING)
430 static int mace_open(struct net_device *dev)
432 struct mace_data *mp = (struct mace_data *) dev->priv;
433 volatile struct mace __iomem *mb = mp->mace;
434 volatile struct dbdma_regs __iomem *rd = mp->rx_dma;
435 volatile struct dbdma_regs __iomem *td = mp->tx_dma;
436 volatile struct dbdma_cmd *cp;
444 /* initialize list of sk_buffs for receiving and set up recv dma */
445 mace_clean_rings(mp);
446 memset((char *)mp->rx_cmds, 0, N_RX_RING * sizeof(struct dbdma_cmd));
448 for (i = 0; i < N_RX_RING - 1; ++i) {
449 skb = dev_alloc_skb(RX_BUFLEN + 2);
453 skb_reserve(skb, 2); /* so IP header lands on 4-byte bdry */
456 mp->rx_bufs[i] = skb;
457 st_le16(&cp->req_count, RX_BUFLEN);
458 st_le16(&cp->command, INPUT_LAST + INTR_ALWAYS);
459 st_le32(&cp->phy_addr, virt_to_bus(data));
463 mp->rx_bufs[i] = NULL;
464 st_le16(&cp->command, DBDMA_STOP);
468 /* Put a branch back to the beginning of the receive command list */
470 st_le16(&cp->command, DBDMA_NOP + BR_ALWAYS);
471 st_le32(&cp->cmd_dep, virt_to_bus(mp->rx_cmds));
474 out_le32(&rd->control, (RUN|PAUSE|FLUSH|WAKE) << 16); /* clear run bit */
475 out_le32(&rd->cmdptr, virt_to_bus(mp->rx_cmds));
476 out_le32(&rd->control, (RUN << 16) | RUN);
478 /* put a branch at the end of the tx command list */
479 cp = mp->tx_cmds + NCMDS_TX * N_TX_RING;
480 st_le16(&cp->command, DBDMA_NOP + BR_ALWAYS);
481 st_le32(&cp->cmd_dep, virt_to_bus(mp->tx_cmds));
484 out_le32(&td->control, (RUN|PAUSE|FLUSH|WAKE) << 16);
485 out_le32(&td->cmdptr, virt_to_bus(mp->tx_cmds));
493 out_8(&mb->maccc, mp->maccc);
494 /* enable all interrupts except receive interrupts */
495 out_8(&mb->imr, RCVINT);
500 static int mace_close(struct net_device *dev)
502 struct mace_data *mp = (struct mace_data *) dev->priv;
503 volatile struct mace __iomem *mb = mp->mace;
504 volatile struct dbdma_regs __iomem *rd = mp->rx_dma;
505 volatile struct dbdma_regs __iomem *td = mp->tx_dma;
507 /* disable rx and tx */
508 out_8(&mb->maccc, 0);
509 out_8(&mb->imr, 0xff); /* disable all intrs */
511 /* disable rx and tx dma */
512 st_le32(&rd->control, (RUN|PAUSE|FLUSH|WAKE) << 16); /* clear run bit */
513 st_le32(&td->control, (RUN|PAUSE|FLUSH|WAKE) << 16); /* clear run bit */
515 mace_clean_rings(mp);
520 static inline void mace_set_timeout(struct net_device *dev)
522 struct mace_data *mp = (struct mace_data *) dev->priv;
524 if (mp->timeout_active)
525 del_timer(&mp->tx_timeout);
526 mp->tx_timeout.expires = jiffies + TX_TIMEOUT;
527 mp->tx_timeout.function = mace_tx_timeout;
528 mp->tx_timeout.data = (unsigned long) dev;
529 add_timer(&mp->tx_timeout);
530 mp->timeout_active = 1;
533 static int mace_xmit_start(struct sk_buff *skb, struct net_device *dev)
535 struct mace_data *mp = (struct mace_data *) dev->priv;
536 volatile struct dbdma_regs __iomem *td = mp->tx_dma;
537 volatile struct dbdma_cmd *cp, *np;
541 /* see if there's a free slot in the tx ring */
542 spin_lock_irqsave(&mp->lock, flags);
545 if (next >= N_TX_RING)
547 if (next == mp->tx_empty) {
548 netif_stop_queue(dev);
550 spin_unlock_irqrestore(&mp->lock, flags);
551 return 1; /* can't take it at the moment */
553 spin_unlock_irqrestore(&mp->lock, flags);
555 /* partially fill in the dma command block */
557 if (len > ETH_FRAME_LEN) {
558 printk(KERN_DEBUG "mace: xmit frame too long (%d)\n", len);
561 mp->tx_bufs[fill] = skb;
562 cp = mp->tx_cmds + NCMDS_TX * fill;
563 st_le16(&cp->req_count, len);
564 st_le32(&cp->phy_addr, virt_to_bus(skb->data));
566 np = mp->tx_cmds + NCMDS_TX * next;
567 out_le16(&np->command, DBDMA_STOP);
569 /* poke the tx dma channel */
570 spin_lock_irqsave(&mp->lock, flags);
572 if (!mp->tx_bad_runt && mp->tx_active < MAX_TX_ACTIVE) {
573 out_le16(&cp->xfer_status, 0);
574 out_le16(&cp->command, OUTPUT_LAST);
575 out_le32(&td->control, ((RUN|WAKE) << 16) + (RUN|WAKE));
577 mace_set_timeout(dev);
579 if (++next >= N_TX_RING)
581 if (next == mp->tx_empty)
582 netif_stop_queue(dev);
583 spin_unlock_irqrestore(&mp->lock, flags);
588 static struct net_device_stats *mace_stats(struct net_device *dev)
590 struct mace_data *p = (struct mace_data *) dev->priv;
595 static void mace_set_multicast(struct net_device *dev)
597 struct mace_data *mp = (struct mace_data *) dev->priv;
598 volatile struct mace __iomem *mb = mp->mace;
603 spin_lock_irqsave(&mp->lock, flags);
605 if (dev->flags & IFF_PROMISC) {
608 unsigned char multicast_filter[8];
609 struct dev_mc_list *dmi = dev->mc_list;
611 if (dev->flags & IFF_ALLMULTI) {
612 for (i = 0; i < 8; i++)
613 multicast_filter[i] = 0xff;
615 for (i = 0; i < 8; i++)
616 multicast_filter[i] = 0;
617 for (i = 0; i < dev->mc_count; i++) {
618 crc = ether_crc_le(6, dmi->dmi_addr);
619 j = crc >> 26; /* bit number in multicast_filter */
620 multicast_filter[j >> 3] |= 1 << (j & 7);
625 printk("Multicast filter :");
626 for (i = 0; i < 8; i++)
627 printk("%02x ", multicast_filter[i]);
631 if (mp->chipid == BROKEN_ADDRCHG_REV)
632 out_8(&mb->iac, LOGADDR);
634 out_8(&mb->iac, ADDRCHG | LOGADDR);
635 while ((in_8(&mb->iac) & ADDRCHG) != 0)
638 for (i = 0; i < 8; ++i)
639 out_8(&mb->ladrf, multicast_filter[i]);
640 if (mp->chipid != BROKEN_ADDRCHG_REV)
644 out_8(&mb->maccc, mp->maccc);
645 spin_unlock_irqrestore(&mp->lock, flags);
648 static void mace_handle_misc_intrs(struct mace_data *mp, int intr)
650 volatile struct mace __iomem *mb = mp->mace;
651 static int mace_babbles, mace_jabbers;
654 mp->stats.rx_missed_errors += 256;
655 mp->stats.rx_missed_errors += in_8(&mb->mpc); /* reading clears it */
657 mp->stats.rx_length_errors += 256;
658 mp->stats.rx_length_errors += in_8(&mb->rntpc); /* reading clears it */
660 ++mp->stats.tx_heartbeat_errors;
662 if (mace_babbles++ < 4)
663 printk(KERN_DEBUG "mace: babbling transmitter\n");
665 if (mace_jabbers++ < 4)
666 printk(KERN_DEBUG "mace: jabbering transceiver\n");
669 static irqreturn_t mace_interrupt(int irq, void *dev_id)
671 struct net_device *dev = (struct net_device *) dev_id;
672 struct mace_data *mp = (struct mace_data *) dev->priv;
673 volatile struct mace __iomem *mb = mp->mace;
674 volatile struct dbdma_regs __iomem *td = mp->tx_dma;
675 volatile struct dbdma_cmd *cp;
676 int intr, fs, i, stat, x;
679 /* static int mace_last_fs, mace_last_xcount; */
681 spin_lock_irqsave(&mp->lock, flags);
682 intr = in_8(&mb->ir); /* read interrupt register */
683 in_8(&mb->xmtrc); /* get retries */
684 mace_handle_misc_intrs(mp, intr);
687 while (in_8(&mb->pr) & XMTSV) {
688 del_timer(&mp->tx_timeout);
689 mp->timeout_active = 0;
691 * Clear any interrupt indication associated with this status
692 * word. This appears to unlatch any error indication from
693 * the DMA controller.
695 intr = in_8(&mb->ir);
697 mace_handle_misc_intrs(mp, intr);
698 if (mp->tx_bad_runt) {
699 fs = in_8(&mb->xmtfs);
701 out_8(&mb->xmtfc, AUTO_PAD_XMIT);
704 dstat = ld_le32(&td->status);
705 /* stop DMA controller */
706 out_le32(&td->control, RUN << 16);
708 * xcount is the number of complete frames which have been
709 * written to the fifo but for which status has not been read.
711 xcount = (in_8(&mb->fifofc) >> XMTFC_SH) & XMTFC_MASK;
712 if (xcount == 0 || (dstat & DEAD)) {
714 * If a packet was aborted before the DMA controller has
715 * finished transferring it, it seems that there are 2 bytes
716 * which are stuck in some buffer somewhere. These will get
717 * transmitted as soon as we read the frame status (which
718 * reenables the transmit data transfer request). Turning
719 * off the DMA controller and/or resetting the MACE doesn't
720 * help. So we disable auto-padding and FCS transmission
721 * so the two bytes will only be a runt packet which should
722 * be ignored by other stations.
724 out_8(&mb->xmtfc, DXMTFCS);
726 fs = in_8(&mb->xmtfs);
727 if ((fs & XMTSV) == 0) {
728 printk(KERN_ERR "mace: xmtfs not valid! (fs=%x xc=%d ds=%x)\n",
732 * XXX mace likes to hang the machine after a xmtfs error.
733 * This is hard to reproduce, reseting *may* help
736 cp = mp->tx_cmds + NCMDS_TX * i;
737 stat = ld_le16(&cp->xfer_status);
738 if ((fs & (UFLO|LCOL|LCAR|RTRY)) || (dstat & DEAD) || xcount == 0) {
740 * Check whether there were in fact 2 bytes written to
744 x = (in_8(&mb->fifofc) >> XMTFC_SH) & XMTFC_MASK;
746 /* there were two bytes with an end-of-packet indication */
748 mace_set_timeout(dev);
751 * Either there weren't the two bytes buffered up, or they
752 * didn't have an end-of-packet indication.
753 * We flush the transmit FIFO just in case (by setting the
754 * XMTFWU bit with the transmitter disabled).
756 out_8(&mb->maccc, in_8(&mb->maccc) & ~ENXMT);
757 out_8(&mb->fifocc, in_8(&mb->fifocc) | XMTFWU);
759 out_8(&mb->maccc, in_8(&mb->maccc) | ENXMT);
760 out_8(&mb->xmtfc, AUTO_PAD_XMIT);
763 /* dma should have finished */
764 if (i == mp->tx_fill) {
765 printk(KERN_DEBUG "mace: tx ring ran out? (fs=%x xc=%d ds=%x)\n",
770 if (fs & (UFLO|LCOL|LCAR|RTRY)) {
771 ++mp->stats.tx_errors;
773 ++mp->stats.tx_carrier_errors;
774 if (fs & (UFLO|LCOL|RTRY))
775 ++mp->stats.tx_aborted_errors;
777 mp->stats.tx_bytes += mp->tx_bufs[i]->len;
778 ++mp->stats.tx_packets;
780 dev_kfree_skb_irq(mp->tx_bufs[i]);
782 if (++i >= N_TX_RING)
786 mace_last_xcount = xcount;
790 if (i != mp->tx_empty) {
792 netif_wake_queue(dev);
798 if (!mp->tx_bad_runt && i != mp->tx_fill && mp->tx_active < MAX_TX_ACTIVE) {
800 /* set up the next one */
801 cp = mp->tx_cmds + NCMDS_TX * i;
802 out_le16(&cp->xfer_status, 0);
803 out_le16(&cp->command, OUTPUT_LAST);
805 if (++i >= N_TX_RING)
807 } while (i != mp->tx_fill && mp->tx_active < MAX_TX_ACTIVE);
808 out_le32(&td->control, ((RUN|WAKE) << 16) + (RUN|WAKE));
809 mace_set_timeout(dev);
811 spin_unlock_irqrestore(&mp->lock, flags);
815 static void mace_tx_timeout(unsigned long data)
817 struct net_device *dev = (struct net_device *) data;
818 struct mace_data *mp = (struct mace_data *) dev->priv;
819 volatile struct mace __iomem *mb = mp->mace;
820 volatile struct dbdma_regs __iomem *td = mp->tx_dma;
821 volatile struct dbdma_regs __iomem *rd = mp->rx_dma;
822 volatile struct dbdma_cmd *cp;
826 spin_lock_irqsave(&mp->lock, flags);
827 mp->timeout_active = 0;
828 if (mp->tx_active == 0 && !mp->tx_bad_runt)
831 /* update various counters */
832 mace_handle_misc_intrs(mp, in_8(&mb->ir));
834 cp = mp->tx_cmds + NCMDS_TX * mp->tx_empty;
836 /* turn off both tx and rx and reset the chip */
837 out_8(&mb->maccc, 0);
838 printk(KERN_ERR "mace: transmit timeout - resetting\n");
843 cp = bus_to_virt(ld_le32(&rd->cmdptr));
845 out_le16(&cp->xfer_status, 0);
846 out_le32(&rd->cmdptr, virt_to_bus(cp));
847 out_le32(&rd->control, (RUN << 16) | RUN);
849 /* fix up the transmit side */
852 ++mp->stats.tx_errors;
853 if (mp->tx_bad_runt) {
855 } else if (i != mp->tx_fill) {
856 dev_kfree_skb(mp->tx_bufs[i]);
857 if (++i >= N_TX_RING)
862 netif_wake_queue(dev);
863 if (i != mp->tx_fill) {
864 cp = mp->tx_cmds + NCMDS_TX * i;
865 out_le16(&cp->xfer_status, 0);
866 out_le16(&cp->command, OUTPUT_LAST);
867 out_le32(&td->cmdptr, virt_to_bus(cp));
868 out_le32(&td->control, (RUN << 16) | RUN);
870 mace_set_timeout(dev);
873 /* turn it back on */
874 out_8(&mb->imr, RCVINT);
875 out_8(&mb->maccc, mp->maccc);
878 spin_unlock_irqrestore(&mp->lock, flags);
881 static irqreturn_t mace_txdma_intr(int irq, void *dev_id)
886 static irqreturn_t mace_rxdma_intr(int irq, void *dev_id)
888 struct net_device *dev = (struct net_device *) dev_id;
889 struct mace_data *mp = (struct mace_data *) dev->priv;
890 volatile struct dbdma_regs __iomem *rd = mp->rx_dma;
891 volatile struct dbdma_cmd *cp, *np;
892 int i, nb, stat, next;
894 unsigned frame_status;
895 static int mace_lost_status;
899 spin_lock_irqsave(&mp->lock, flags);
900 for (i = mp->rx_empty; i != mp->rx_fill; ) {
901 cp = mp->rx_cmds + i;
902 stat = ld_le16(&cp->xfer_status);
903 if ((stat & ACTIVE) == 0) {
905 if (next >= N_RX_RING)
907 np = mp->rx_cmds + next;
908 if (next != mp->rx_fill
909 && (ld_le16(&np->xfer_status) & ACTIVE) != 0) {
910 printk(KERN_DEBUG "mace: lost a status word\n");
915 nb = ld_le16(&cp->req_count) - ld_le16(&cp->res_count);
916 out_le16(&cp->command, DBDMA_STOP);
917 /* got a packet, have a look at it */
918 skb = mp->rx_bufs[i];
920 ++mp->stats.rx_dropped;
923 frame_status = (data[nb-3] << 8) + data[nb-4];
924 if (frame_status & (RS_OFLO|RS_CLSN|RS_FRAMERR|RS_FCSERR)) {
925 ++mp->stats.rx_errors;
926 if (frame_status & RS_OFLO)
927 ++mp->stats.rx_over_errors;
928 if (frame_status & RS_FRAMERR)
929 ++mp->stats.rx_frame_errors;
930 if (frame_status & RS_FCSERR)
931 ++mp->stats.rx_crc_errors;
933 /* Mace feature AUTO_STRIP_RCV is on by default, dropping the
934 * FCS on frames with 802.3 headers. This means that Ethernet
935 * frames have 8 extra octets at the end, while 802.3 frames
936 * have only 4. We need to correctly account for this. */
937 if (*(unsigned short *)(data+12) < 1536) /* 802.3 header */
939 else /* Ethernet header; mace includes FCS */
943 skb->protocol = eth_type_trans(skb, dev);
944 mp->stats.rx_bytes += skb->len;
946 dev->last_rx = jiffies;
947 mp->rx_bufs[i] = NULL;
948 ++mp->stats.rx_packets;
951 ++mp->stats.rx_errors;
952 ++mp->stats.rx_length_errors;
955 /* advance to next */
956 if (++i >= N_RX_RING)
964 if (next >= N_RX_RING)
966 if (next == mp->rx_empty)
968 cp = mp->rx_cmds + i;
969 skb = mp->rx_bufs[i];
971 skb = dev_alloc_skb(RX_BUFLEN + 2);
974 mp->rx_bufs[i] = skb;
977 st_le16(&cp->req_count, RX_BUFLEN);
978 data = skb? skb->data: dummy_buf;
979 st_le32(&cp->phy_addr, virt_to_bus(data));
980 out_le16(&cp->xfer_status, 0);
981 out_le16(&cp->command, INPUT_LAST + INTR_ALWAYS);
983 if ((ld_le32(&rd->status) & ACTIVE) != 0) {
984 out_le32(&rd->control, (PAUSE << 16) | PAUSE);
985 while ((in_le32(&rd->status) & ACTIVE) != 0)
991 if (i != mp->rx_fill) {
992 out_le32(&rd->control, ((RUN|WAKE) << 16) | (RUN|WAKE));
995 spin_unlock_irqrestore(&mp->lock, flags);
999 static struct of_device_id mace_match[] =
1006 MODULE_DEVICE_TABLE (of, mace_match);
1008 static struct macio_driver mace_driver =
1011 .match_table = mace_match,
1012 .probe = mace_probe,
1013 .remove = mace_remove,
1017 static int __init mace_init(void)
1019 return macio_register_driver(&mace_driver);
1022 static void __exit mace_cleanup(void)
1024 macio_unregister_driver(&mace_driver);
1030 MODULE_AUTHOR("Paul Mackerras");
1031 MODULE_DESCRIPTION("PowerMac MACE driver.");
1032 module_param(port_aaui, int, 0);
1033 MODULE_PARM_DESC(port_aaui, "MACE uses AAUI port (0-1)");
1034 MODULE_LICENSE("GPL");
1036 module_init(mace_init);
1037 module_exit(mace_cleanup);