2 * Network device driver for the BMAC ethernet controller on
3 * Apple Powermacs. Assumes it's under a DBDMA controller.
5 * Copyright (C) 1998 Randy Gobbel.
7 * May 1999, Al Viro: proper release of /proc/net/bmac entry, switched to
8 * dynamic procfs inode.
10 #include <linux/config.h>
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/netdevice.h>
14 #include <linux/etherdevice.h>
15 #include <linux/delay.h>
16 #include <linux/string.h>
17 #include <linux/timer.h>
18 #include <linux/proc_fs.h>
19 #include <linux/init.h>
20 #include <linux/spinlock.h>
21 #include <linux/crc32.h>
23 #include <asm/dbdma.h>
26 #include <asm/pgtable.h>
27 #include <asm/machdep.h>
28 #include <asm/pmac_feature.h>
29 #include <asm/macio.h>
34 #define trunc_page(x) ((void *)(((unsigned long)(x)) & ~((unsigned long)(PAGE_SIZE - 1))))
35 #define round_page(x) trunc_page(((unsigned long)(x)) + ((unsigned long)(PAGE_SIZE - 1)))
38 * CRC polynomial - used in working out multicast filter bits.
40 #define ENET_CRCPOLY 0x04c11db7
42 /* switch to use multicast code lifted from sunhme driver */
43 #define SUNHME_MULTICAST
47 #define MAX_TX_ACTIVE 1
49 #define ETHERMINPACKET 64
51 #define RX_BUFLEN (ETHERMTU + 14 + ETHERCRC + 2)
52 #define TX_TIMEOUT HZ /* 1 second */
54 /* Bits in transmit DMA status */
55 #define TX_DMA_ERR 0x80
60 /* volatile struct bmac *bmac; */
61 struct sk_buff_head *queue;
62 volatile struct dbdma_regs __iomem *tx_dma;
64 volatile struct dbdma_regs __iomem *rx_dma;
66 volatile struct dbdma_cmd *tx_cmds; /* xmit dma command list */
67 volatile struct dbdma_cmd *rx_cmds; /* recv dma command list */
68 struct macio_dev *mdev;
70 struct sk_buff *rx_bufs[N_RX_RING];
73 struct sk_buff *tx_bufs[N_TX_RING];
76 unsigned char tx_fullup;
77 struct net_device_stats stats;
78 struct timer_list tx_timeout;
82 unsigned short hash_use_count[64];
83 unsigned short hash_table_mask[4];
87 #if 0 /* Move that to ethtool */
89 typedef struct bmac_reg_entry {
91 unsigned short reg_offset;
94 #define N_REG_ENTRIES 31
96 static bmac_reg_entry_t reg_entries[N_REG_ENTRIES] = {
98 {"MEMDATAHI", MEMDATAHI},
99 {"MEMDATALO", MEMDATALO},
132 static unsigned char *bmac_emergency_rxbuf;
135 * Number of bytes of private data per BMAC: allow enough for
136 * the rx and tx dma commands plus a branch dma command each,
137 * and another 16 bytes to allow us to align the dma command
138 * buffers on a 16 byte boundary.
140 #define PRIV_BYTES (sizeof(struct bmac_data) \
141 + (N_RX_RING + N_TX_RING + 4) * sizeof(struct dbdma_cmd) \
142 + sizeof(struct sk_buff_head))
144 static unsigned char bitrev(unsigned char b);
145 static int bmac_open(struct net_device *dev);
146 static int bmac_close(struct net_device *dev);
147 static int bmac_transmit_packet(struct sk_buff *skb, struct net_device *dev);
148 static struct net_device_stats *bmac_stats(struct net_device *dev);
149 static void bmac_set_multicast(struct net_device *dev);
150 static void bmac_reset_and_enable(struct net_device *dev);
151 static void bmac_start_chip(struct net_device *dev);
152 static void bmac_init_chip(struct net_device *dev);
153 static void bmac_init_registers(struct net_device *dev);
154 static void bmac_enable_and_reset_chip(struct net_device *dev);
155 static int bmac_set_address(struct net_device *dev, void *addr);
156 static irqreturn_t bmac_misc_intr(int irq, void *dev_id, struct pt_regs *regs);
157 static irqreturn_t bmac_txdma_intr(int irq, void *dev_id, struct pt_regs *regs);
158 static irqreturn_t bmac_rxdma_intr(int irq, void *dev_id, struct pt_regs *regs);
159 static void bmac_set_timeout(struct net_device *dev);
160 static void bmac_tx_timeout(unsigned long data);
161 static int bmac_output(struct sk_buff *skb, struct net_device *dev);
162 static void bmac_start(struct net_device *dev);
164 #define DBDMA_SET(x) ( ((x) | (x) << 16) )
165 #define DBDMA_CLEAR(x) ( (x) << 16)
168 dbdma_st32(volatile __u32 __iomem *a, unsigned long x)
170 __asm__ volatile( "stwbrx %0,0,%1" : : "r" (x), "r" (a) : "memory");
174 static inline unsigned long
175 dbdma_ld32(volatile __u32 __iomem *a)
178 __asm__ volatile ("lwbrx %0,0,%1" : "=r" (swap) : "r" (a));
183 dbdma_continue(volatile struct dbdma_regs __iomem *dmap)
185 dbdma_st32(&dmap->control,
186 DBDMA_SET(RUN|WAKE) | DBDMA_CLEAR(PAUSE|DEAD));
191 dbdma_reset(volatile struct dbdma_regs __iomem *dmap)
193 dbdma_st32(&dmap->control,
194 DBDMA_CLEAR(ACTIVE|DEAD|WAKE|FLUSH|PAUSE|RUN));
196 while (dbdma_ld32(&dmap->status) & RUN)
201 dbdma_setcmd(volatile struct dbdma_cmd *cp,
202 unsigned short cmd, unsigned count, unsigned long addr,
203 unsigned long cmd_dep)
205 out_le16(&cp->command, cmd);
206 out_le16(&cp->req_count, count);
207 out_le32(&cp->phy_addr, addr);
208 out_le32(&cp->cmd_dep, cmd_dep);
209 out_le16(&cp->xfer_status, 0);
210 out_le16(&cp->res_count, 0);
214 void bmwrite(struct net_device *dev, unsigned long reg_offset, unsigned data )
216 out_le16((void __iomem *)dev->base_addr + reg_offset, data);
221 volatile unsigned short bmread(struct net_device *dev, unsigned long reg_offset )
223 return in_le16((void __iomem *)dev->base_addr + reg_offset);
227 bmac_enable_and_reset_chip(struct net_device *dev)
229 struct bmac_data *bp = netdev_priv(dev);
230 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
231 volatile struct dbdma_regs __iomem *td = bp->tx_dma;
238 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 1);
241 #define MIFDELAY udelay(10)
244 bmac_mif_readbits(struct net_device *dev, int nb)
246 unsigned int val = 0;
249 bmwrite(dev, MIFCSR, 0);
251 if (bmread(dev, MIFCSR) & 8)
253 bmwrite(dev, MIFCSR, 1);
256 bmwrite(dev, MIFCSR, 0);
258 bmwrite(dev, MIFCSR, 1);
264 bmac_mif_writebits(struct net_device *dev, unsigned int val, int nb)
269 b = (val & (1 << nb))? 6: 4;
270 bmwrite(dev, MIFCSR, b);
272 bmwrite(dev, MIFCSR, b|1);
278 bmac_mif_read(struct net_device *dev, unsigned int addr)
282 bmwrite(dev, MIFCSR, 4);
284 bmac_mif_writebits(dev, ~0U, 32);
285 bmac_mif_writebits(dev, 6, 4);
286 bmac_mif_writebits(dev, addr, 10);
287 bmwrite(dev, MIFCSR, 2);
289 bmwrite(dev, MIFCSR, 1);
291 val = bmac_mif_readbits(dev, 17);
292 bmwrite(dev, MIFCSR, 4);
298 bmac_mif_write(struct net_device *dev, unsigned int addr, unsigned int val)
300 bmwrite(dev, MIFCSR, 4);
302 bmac_mif_writebits(dev, ~0U, 32);
303 bmac_mif_writebits(dev, 5, 4);
304 bmac_mif_writebits(dev, addr, 10);
305 bmac_mif_writebits(dev, 2, 2);
306 bmac_mif_writebits(dev, val, 16);
307 bmac_mif_writebits(dev, 3, 2);
311 bmac_init_registers(struct net_device *dev)
313 struct bmac_data *bp = netdev_priv(dev);
314 volatile unsigned short regValue;
315 unsigned short *pWord16;
318 /* XXDEBUG(("bmac: enter init_registers\n")); */
320 bmwrite(dev, RXRST, RxResetValue);
321 bmwrite(dev, TXRST, TxResetBit);
327 regValue = bmread(dev, TXRST); /* wait for reset to clear..acknowledge */
328 } while ((regValue & TxResetBit) && i > 0);
330 if (!bp->is_bmac_plus) {
331 regValue = bmread(dev, XCVRIF);
332 regValue |= ClkBit | SerialMode | COLActiveLow;
333 bmwrite(dev, XCVRIF, regValue);
337 bmwrite(dev, RSEED, (unsigned short)0x1968);
339 regValue = bmread(dev, XIFC);
340 regValue |= TxOutputEnable;
341 bmwrite(dev, XIFC, regValue);
345 /* set collision counters to 0 */
346 bmwrite(dev, NCCNT, 0);
347 bmwrite(dev, NTCNT, 0);
348 bmwrite(dev, EXCNT, 0);
349 bmwrite(dev, LTCNT, 0);
351 /* set rx counters to 0 */
352 bmwrite(dev, FRCNT, 0);
353 bmwrite(dev, LECNT, 0);
354 bmwrite(dev, AECNT, 0);
355 bmwrite(dev, FECNT, 0);
356 bmwrite(dev, RXCV, 0);
358 /* set tx fifo information */
359 bmwrite(dev, TXTH, 4); /* 4 octets before tx starts */
361 bmwrite(dev, TXFIFOCSR, 0); /* first disable txFIFO */
362 bmwrite(dev, TXFIFOCSR, TxFIFOEnable );
364 /* set rx fifo information */
365 bmwrite(dev, RXFIFOCSR, 0); /* first disable rxFIFO */
366 bmwrite(dev, RXFIFOCSR, RxFIFOEnable );
368 //bmwrite(dev, TXCFG, TxMACEnable); /* TxNeverGiveUp maybe later */
369 bmread(dev, STATUS); /* read it just to clear it */
371 /* zero out the chip Hash Filter registers */
372 for (i=0; i<4; i++) bp->hash_table_mask[i] = 0;
373 bmwrite(dev, BHASH3, bp->hash_table_mask[0]); /* bits 15 - 0 */
374 bmwrite(dev, BHASH2, bp->hash_table_mask[1]); /* bits 31 - 16 */
375 bmwrite(dev, BHASH1, bp->hash_table_mask[2]); /* bits 47 - 32 */
376 bmwrite(dev, BHASH0, bp->hash_table_mask[3]); /* bits 63 - 48 */
378 pWord16 = (unsigned short *)dev->dev_addr;
379 bmwrite(dev, MADD0, *pWord16++);
380 bmwrite(dev, MADD1, *pWord16++);
381 bmwrite(dev, MADD2, *pWord16);
383 bmwrite(dev, RXCFG, RxCRCNoStrip | RxHashFilterEnable | RxRejectOwnPackets);
385 bmwrite(dev, INTDISABLE, EnableNormal);
392 bmac_disable_interrupts(struct net_device *dev)
394 bmwrite(dev, INTDISABLE, DisableAll);
398 bmac_enable_interrupts(struct net_device *dev)
400 bmwrite(dev, INTDISABLE, EnableNormal);
406 bmac_start_chip(struct net_device *dev)
408 struct bmac_data *bp = netdev_priv(dev);
409 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
410 unsigned short oldConfig;
412 /* enable rx dma channel */
415 oldConfig = bmread(dev, TXCFG);
416 bmwrite(dev, TXCFG, oldConfig | TxMACEnable );
418 /* turn on rx plus any other bits already on (promiscuous possibly) */
419 oldConfig = bmread(dev, RXCFG);
420 bmwrite(dev, RXCFG, oldConfig | RxMACEnable );
425 bmac_init_phy(struct net_device *dev)
428 struct bmac_data *bp = netdev_priv(dev);
430 printk(KERN_DEBUG "phy registers:");
431 for (addr = 0; addr < 32; ++addr) {
433 printk("\n" KERN_DEBUG);
434 printk(" %.4x", bmac_mif_read(dev, addr));
437 if (bp->is_bmac_plus) {
438 unsigned int capable, ctrl;
440 ctrl = bmac_mif_read(dev, 0);
441 capable = ((bmac_mif_read(dev, 1) & 0xf800) >> 6) | 1;
442 if (bmac_mif_read(dev, 4) != capable
443 || (ctrl & 0x1000) == 0) {
444 bmac_mif_write(dev, 4, capable);
445 bmac_mif_write(dev, 0, 0x1200);
447 bmac_mif_write(dev, 0, 0x1000);
451 static void bmac_init_chip(struct net_device *dev)
454 bmac_init_registers(dev);
458 static int bmac_suspend(struct macio_dev *mdev, pm_message_t state)
460 struct net_device* dev = macio_get_drvdata(mdev);
461 struct bmac_data *bp = netdev_priv(dev);
463 unsigned short config;
466 netif_device_detach(dev);
467 /* prolly should wait for dma to finish & turn off the chip */
468 spin_lock_irqsave(&bp->lock, flags);
469 if (bp->timeout_active) {
470 del_timer(&bp->tx_timeout);
471 bp->timeout_active = 0;
473 disable_irq(dev->irq);
474 disable_irq(bp->tx_dma_intr);
475 disable_irq(bp->rx_dma_intr);
477 spin_unlock_irqrestore(&bp->lock, flags);
479 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
480 volatile struct dbdma_regs __iomem *td = bp->tx_dma;
482 config = bmread(dev, RXCFG);
483 bmwrite(dev, RXCFG, (config & ~RxMACEnable));
484 config = bmread(dev, TXCFG);
485 bmwrite(dev, TXCFG, (config & ~TxMACEnable));
486 bmwrite(dev, INTDISABLE, DisableAll); /* disable all intrs */
487 /* disable rx and tx dma */
488 st_le32(&rd->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
489 st_le32(&td->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
490 /* free some skb's */
491 for (i=0; i<N_RX_RING; i++) {
492 if (bp->rx_bufs[i] != NULL) {
493 dev_kfree_skb(bp->rx_bufs[i]);
494 bp->rx_bufs[i] = NULL;
497 for (i = 0; i<N_TX_RING; i++) {
498 if (bp->tx_bufs[i] != NULL) {
499 dev_kfree_skb(bp->tx_bufs[i]);
500 bp->tx_bufs[i] = NULL;
504 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
508 static int bmac_resume(struct macio_dev *mdev)
510 struct net_device* dev = macio_get_drvdata(mdev);
511 struct bmac_data *bp = netdev_priv(dev);
513 /* see if this is enough */
515 bmac_reset_and_enable(dev);
517 enable_irq(dev->irq);
518 enable_irq(bp->tx_dma_intr);
519 enable_irq(bp->rx_dma_intr);
520 netif_device_attach(dev);
524 #endif /* CONFIG_PM */
526 static int bmac_set_address(struct net_device *dev, void *addr)
528 struct bmac_data *bp = netdev_priv(dev);
529 unsigned char *p = addr;
530 unsigned short *pWord16;
534 XXDEBUG(("bmac: enter set_address\n"));
535 spin_lock_irqsave(&bp->lock, flags);
537 for (i = 0; i < 6; ++i) {
538 dev->dev_addr[i] = p[i];
540 /* load up the hardware address */
541 pWord16 = (unsigned short *)dev->dev_addr;
542 bmwrite(dev, MADD0, *pWord16++);
543 bmwrite(dev, MADD1, *pWord16++);
544 bmwrite(dev, MADD2, *pWord16);
546 spin_unlock_irqrestore(&bp->lock, flags);
547 XXDEBUG(("bmac: exit set_address\n"));
551 static inline void bmac_set_timeout(struct net_device *dev)
553 struct bmac_data *bp = netdev_priv(dev);
556 spin_lock_irqsave(&bp->lock, flags);
557 if (bp->timeout_active)
558 del_timer(&bp->tx_timeout);
559 bp->tx_timeout.expires = jiffies + TX_TIMEOUT;
560 bp->tx_timeout.function = bmac_tx_timeout;
561 bp->tx_timeout.data = (unsigned long) dev;
562 add_timer(&bp->tx_timeout);
563 bp->timeout_active = 1;
564 spin_unlock_irqrestore(&bp->lock, flags);
568 bmac_construct_xmt(struct sk_buff *skb, volatile struct dbdma_cmd *cp)
576 baddr = virt_to_bus(vaddr);
578 dbdma_setcmd(cp, (OUTPUT_LAST | INTR_ALWAYS | WAIT_IFCLR), len, baddr, 0);
582 bmac_construct_rxbuff(struct sk_buff *skb, volatile struct dbdma_cmd *cp)
584 unsigned char *addr = skb? skb->data: bmac_emergency_rxbuf;
586 dbdma_setcmd(cp, (INPUT_LAST | INTR_ALWAYS), RX_BUFLEN,
587 virt_to_bus(addr), 0);
590 /* Bit-reverse one byte of an ethernet hardware address. */
592 bitrev(unsigned char b)
596 for (i = 0; i < 8; ++i, b >>= 1)
597 d = (d << 1) | (b & 1);
603 bmac_init_tx_ring(struct bmac_data *bp)
605 volatile struct dbdma_regs __iomem *td = bp->tx_dma;
607 memset((char *)bp->tx_cmds, 0, (N_TX_RING+1) * sizeof(struct dbdma_cmd));
613 /* put a branch at the end of the tx command list */
614 dbdma_setcmd(&bp->tx_cmds[N_TX_RING],
615 (DBDMA_NOP | BR_ALWAYS), 0, 0, virt_to_bus(bp->tx_cmds));
619 out_le32(&td->wait_sel, 0x00200020);
620 out_le32(&td->cmdptr, virt_to_bus(bp->tx_cmds));
624 bmac_init_rx_ring(struct bmac_data *bp)
626 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
630 /* initialize list of sk_buffs for receiving and set up recv dma */
631 memset((char *)bp->rx_cmds, 0,
632 (N_RX_RING + 1) * sizeof(struct dbdma_cmd));
633 for (i = 0; i < N_RX_RING; i++) {
634 if ((skb = bp->rx_bufs[i]) == NULL) {
635 bp->rx_bufs[i] = skb = dev_alloc_skb(RX_BUFLEN+2);
639 bmac_construct_rxbuff(skb, &bp->rx_cmds[i]);
645 /* Put a branch back to the beginning of the receive command list */
646 dbdma_setcmd(&bp->rx_cmds[N_RX_RING],
647 (DBDMA_NOP | BR_ALWAYS), 0, 0, virt_to_bus(bp->rx_cmds));
651 out_le32(&rd->cmdptr, virt_to_bus(bp->rx_cmds));
657 static int bmac_transmit_packet(struct sk_buff *skb, struct net_device *dev)
659 struct bmac_data *bp = netdev_priv(dev);
660 volatile struct dbdma_regs __iomem *td = bp->tx_dma;
663 /* see if there's a free slot in the tx ring */
664 /* XXDEBUG(("bmac_xmit_start: empty=%d fill=%d\n", */
665 /* bp->tx_empty, bp->tx_fill)); */
669 if (i == bp->tx_empty) {
670 netif_stop_queue(dev);
672 XXDEBUG(("bmac_transmit_packet: tx ring full\n"));
673 return -1; /* can't take it at the moment */
676 dbdma_setcmd(&bp->tx_cmds[i], DBDMA_STOP, 0, 0, 0);
678 bmac_construct_xmt(skb, &bp->tx_cmds[bp->tx_fill]);
680 bp->tx_bufs[bp->tx_fill] = skb;
683 bp->stats.tx_bytes += skb->len;
690 static int rxintcount;
692 static irqreturn_t bmac_rxdma_intr(int irq, void *dev_id, struct pt_regs *regs)
694 struct net_device *dev = (struct net_device *) dev_id;
695 struct bmac_data *bp = netdev_priv(dev);
696 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
697 volatile struct dbdma_cmd *cp;
700 unsigned int residual;
704 spin_lock_irqsave(&bp->lock, flags);
706 if (++rxintcount < 10) {
707 XXDEBUG(("bmac_rxdma_intr\n"));
714 cp = &bp->rx_cmds[i];
715 stat = ld_le16(&cp->xfer_status);
716 residual = ld_le16(&cp->res_count);
717 if ((stat & ACTIVE) == 0)
719 nb = RX_BUFLEN - residual - 2;
720 if (nb < (ETHERMINPACKET - ETHERCRC)) {
722 bp->stats.rx_length_errors++;
723 bp->stats.rx_errors++;
725 skb = bp->rx_bufs[i];
726 bp->rx_bufs[i] = NULL;
732 skb->protocol = eth_type_trans(skb, dev);
734 dev->last_rx = jiffies;
735 ++bp->stats.rx_packets;
736 bp->stats.rx_bytes += nb;
738 ++bp->stats.rx_dropped;
740 dev->last_rx = jiffies;
741 if ((skb = bp->rx_bufs[i]) == NULL) {
742 bp->rx_bufs[i] = skb = dev_alloc_skb(RX_BUFLEN+2);
744 skb_reserve(bp->rx_bufs[i], 2);
746 bmac_construct_rxbuff(skb, &bp->rx_cmds[i]);
747 st_le16(&cp->res_count, 0);
748 st_le16(&cp->xfer_status, 0);
750 if (++i >= N_RX_RING) i = 0;
759 spin_unlock_irqrestore(&bp->lock, flags);
761 if (rxintcount < 10) {
762 XXDEBUG(("bmac_rxdma_intr done\n"));
767 static int txintcount;
769 static irqreturn_t bmac_txdma_intr(int irq, void *dev_id, struct pt_regs *regs)
771 struct net_device *dev = (struct net_device *) dev_id;
772 struct bmac_data *bp = netdev_priv(dev);
773 volatile struct dbdma_cmd *cp;
777 spin_lock_irqsave(&bp->lock, flags);
779 if (txintcount++ < 10) {
780 XXDEBUG(("bmac_txdma_intr\n"));
783 /* del_timer(&bp->tx_timeout); */
784 /* bp->timeout_active = 0; */
787 cp = &bp->tx_cmds[bp->tx_empty];
788 stat = ld_le16(&cp->xfer_status);
789 if (txintcount < 10) {
790 XXDEBUG(("bmac_txdma_xfer_stat=%#0x\n", stat));
792 if (!(stat & ACTIVE)) {
794 * status field might not have been filled by DBDMA
796 if (cp == bus_to_virt(in_le32(&bp->tx_dma->cmdptr)))
800 if (bp->tx_bufs[bp->tx_empty]) {
801 ++bp->stats.tx_packets;
802 dev_kfree_skb_irq(bp->tx_bufs[bp->tx_empty]);
804 bp->tx_bufs[bp->tx_empty] = NULL;
806 netif_wake_queue(dev);
807 if (++bp->tx_empty >= N_TX_RING)
809 if (bp->tx_empty == bp->tx_fill)
813 spin_unlock_irqrestore(&bp->lock, flags);
815 if (txintcount < 10) {
816 XXDEBUG(("bmac_txdma_intr done->bmac_start\n"));
823 static struct net_device_stats *bmac_stats(struct net_device *dev)
825 struct bmac_data *p = netdev_priv(dev);
830 #ifndef SUNHME_MULTICAST
831 /* Real fast bit-reversal algorithm, 6-bit values */
832 static int reverse6[64] = {
833 0x0,0x20,0x10,0x30,0x8,0x28,0x18,0x38,
834 0x4,0x24,0x14,0x34,0xc,0x2c,0x1c,0x3c,
835 0x2,0x22,0x12,0x32,0xa,0x2a,0x1a,0x3a,
836 0x6,0x26,0x16,0x36,0xe,0x2e,0x1e,0x3e,
837 0x1,0x21,0x11,0x31,0x9,0x29,0x19,0x39,
838 0x5,0x25,0x15,0x35,0xd,0x2d,0x1d,0x3d,
839 0x3,0x23,0x13,0x33,0xb,0x2b,0x1b,0x3b,
840 0x7,0x27,0x17,0x37,0xf,0x2f,0x1f,0x3f
844 crc416(unsigned int curval, unsigned short nxtval)
846 register unsigned int counter, cur = curval, next = nxtval;
847 register int high_crc_set, low_data_set;
850 next = ((next & 0x00FF) << 8) | (next >> 8);
852 /* Compute bit-by-bit */
853 for (counter = 0; counter < 16; ++counter) {
854 /* is high CRC bit set? */
855 if ((cur & 0x80000000) == 0) high_crc_set = 0;
856 else high_crc_set = 1;
860 if ((next & 0x0001) == 0) low_data_set = 0;
861 else low_data_set = 1;
866 if (high_crc_set ^ low_data_set) cur = cur ^ ENET_CRCPOLY;
872 bmac_crc(unsigned short *address)
876 XXDEBUG(("bmac_crc: addr=%#04x, %#04x, %#04x\n", *address, address[1], address[2]));
877 newcrc = crc416(0xffffffff, *address); /* address bits 47 - 32 */
878 newcrc = crc416(newcrc, address[1]); /* address bits 31 - 16 */
879 newcrc = crc416(newcrc, address[2]); /* address bits 15 - 0 */
885 * Add requested mcast addr to BMac's hash table filter.
890 bmac_addhash(struct bmac_data *bp, unsigned char *addr)
895 if (!(*addr)) return;
896 crc = bmac_crc((unsigned short *)addr) & 0x3f; /* Big-endian alert! */
897 crc = reverse6[crc]; /* Hyperfast bit-reversing algorithm */
898 if (bp->hash_use_count[crc]++) return; /* This bit is already set */
900 mask = (unsigned char)1 << mask;
901 bp->hash_use_count[crc/16] |= mask;
905 bmac_removehash(struct bmac_data *bp, unsigned char *addr)
910 /* Now, delete the address from the filter copy, as indicated */
911 crc = bmac_crc((unsigned short *)addr) & 0x3f; /* Big-endian alert! */
912 crc = reverse6[crc]; /* Hyperfast bit-reversing algorithm */
913 if (bp->hash_use_count[crc] == 0) return; /* That bit wasn't in use! */
914 if (--bp->hash_use_count[crc]) return; /* That bit is still in use */
916 mask = ((unsigned char)1 << mask) ^ 0xffff; /* To turn off bit */
917 bp->hash_table_mask[crc/16] &= mask;
921 * Sync the adapter with the software copy of the multicast mask
922 * (logical address filter).
926 bmac_rx_off(struct net_device *dev)
928 unsigned short rx_cfg;
930 rx_cfg = bmread(dev, RXCFG);
931 rx_cfg &= ~RxMACEnable;
932 bmwrite(dev, RXCFG, rx_cfg);
934 rx_cfg = bmread(dev, RXCFG);
935 } while (rx_cfg & RxMACEnable);
939 bmac_rx_on(struct net_device *dev, int hash_enable, int promisc_enable)
941 unsigned short rx_cfg;
943 rx_cfg = bmread(dev, RXCFG);
944 rx_cfg |= RxMACEnable;
945 if (hash_enable) rx_cfg |= RxHashFilterEnable;
946 else rx_cfg &= ~RxHashFilterEnable;
947 if (promisc_enable) rx_cfg |= RxPromiscEnable;
948 else rx_cfg &= ~RxPromiscEnable;
949 bmwrite(dev, RXRST, RxResetValue);
950 bmwrite(dev, RXFIFOCSR, 0); /* first disable rxFIFO */
951 bmwrite(dev, RXFIFOCSR, RxFIFOEnable );
952 bmwrite(dev, RXCFG, rx_cfg );
957 bmac_update_hash_table_mask(struct net_device *dev, struct bmac_data *bp)
959 bmwrite(dev, BHASH3, bp->hash_table_mask[0]); /* bits 15 - 0 */
960 bmwrite(dev, BHASH2, bp->hash_table_mask[1]); /* bits 31 - 16 */
961 bmwrite(dev, BHASH1, bp->hash_table_mask[2]); /* bits 47 - 32 */
962 bmwrite(dev, BHASH0, bp->hash_table_mask[3]); /* bits 63 - 48 */
967 bmac_add_multi(struct net_device *dev,
968 struct bmac_data *bp, unsigned char *addr)
970 /* XXDEBUG(("bmac: enter bmac_add_multi\n")); */
971 bmac_addhash(bp, addr);
973 bmac_update_hash_table_mask(dev, bp);
974 bmac_rx_on(dev, 1, (dev->flags & IFF_PROMISC)? 1 : 0);
975 /* XXDEBUG(("bmac: exit bmac_add_multi\n")); */
979 bmac_remove_multi(struct net_device *dev,
980 struct bmac_data *bp, unsigned char *addr)
982 bmac_removehash(bp, addr);
984 bmac_update_hash_table_mask(dev, bp);
985 bmac_rx_on(dev, 1, (dev->flags & IFF_PROMISC)? 1 : 0);
989 /* Set or clear the multicast filter for this adaptor.
990 num_addrs == -1 Promiscuous mode, receive all packets
991 num_addrs == 0 Normal mode, clear multicast list
992 num_addrs > 0 Multicast mode, receive normal and MC packets, and do
993 best-effort filtering.
995 static void bmac_set_multicast(struct net_device *dev)
997 struct dev_mc_list *dmi;
998 struct bmac_data *bp = netdev_priv(dev);
999 int num_addrs = dev->mc_count;
1000 unsigned short rx_cfg;
1006 XXDEBUG(("bmac: enter bmac_set_multicast, n_addrs=%d\n", num_addrs));
1008 if((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 64)) {
1009 for (i=0; i<4; i++) bp->hash_table_mask[i] = 0xffff;
1010 bmac_update_hash_table_mask(dev, bp);
1011 rx_cfg = bmac_rx_on(dev, 1, 0);
1012 XXDEBUG(("bmac: all multi, rx_cfg=%#08x\n"));
1013 } else if ((dev->flags & IFF_PROMISC) || (num_addrs < 0)) {
1014 rx_cfg = bmread(dev, RXCFG);
1015 rx_cfg |= RxPromiscEnable;
1016 bmwrite(dev, RXCFG, rx_cfg);
1017 rx_cfg = bmac_rx_on(dev, 0, 1);
1018 XXDEBUG(("bmac: promisc mode enabled, rx_cfg=%#08x\n", rx_cfg));
1020 for (i=0; i<4; i++) bp->hash_table_mask[i] = 0;
1021 for (i=0; i<64; i++) bp->hash_use_count[i] = 0;
1022 if (num_addrs == 0) {
1023 rx_cfg = bmac_rx_on(dev, 0, 0);
1024 XXDEBUG(("bmac: multi disabled, rx_cfg=%#08x\n", rx_cfg));
1026 for (dmi=dev->mc_list; dmi!=NULL; dmi=dmi->next)
1027 bmac_addhash(bp, dmi->dmi_addr);
1028 bmac_update_hash_table_mask(dev, bp);
1029 rx_cfg = bmac_rx_on(dev, 1, 0);
1030 XXDEBUG(("bmac: multi enabled, rx_cfg=%#08x\n", rx_cfg));
1033 /* XXDEBUG(("bmac: exit bmac_set_multicast\n")); */
1035 #else /* ifdef SUNHME_MULTICAST */
1037 /* The version of set_multicast below was lifted from sunhme.c */
1039 static void bmac_set_multicast(struct net_device *dev)
1041 struct dev_mc_list *dmi = dev->mc_list;
1044 unsigned short rx_cfg;
1047 if((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 64)) {
1048 bmwrite(dev, BHASH0, 0xffff);
1049 bmwrite(dev, BHASH1, 0xffff);
1050 bmwrite(dev, BHASH2, 0xffff);
1051 bmwrite(dev, BHASH3, 0xffff);
1052 } else if(dev->flags & IFF_PROMISC) {
1053 rx_cfg = bmread(dev, RXCFG);
1054 rx_cfg |= RxPromiscEnable;
1055 bmwrite(dev, RXCFG, rx_cfg);
1059 rx_cfg = bmread(dev, RXCFG);
1060 rx_cfg &= ~RxPromiscEnable;
1061 bmwrite(dev, RXCFG, rx_cfg);
1063 for(i = 0; i < 4; i++) hash_table[i] = 0;
1065 for(i = 0; i < dev->mc_count; i++) {
1066 addrs = dmi->dmi_addr;
1072 crc = ether_crc_le(6, addrs);
1074 hash_table[crc >> 4] |= 1 << (crc & 0xf);
1076 bmwrite(dev, BHASH0, hash_table[0]);
1077 bmwrite(dev, BHASH1, hash_table[1]);
1078 bmwrite(dev, BHASH2, hash_table[2]);
1079 bmwrite(dev, BHASH3, hash_table[3]);
1082 #endif /* SUNHME_MULTICAST */
1084 static int miscintcount;
1086 static irqreturn_t bmac_misc_intr(int irq, void *dev_id, struct pt_regs *regs)
1088 struct net_device *dev = (struct net_device *) dev_id;
1089 struct bmac_data *bp = netdev_priv(dev);
1090 unsigned int status = bmread(dev, STATUS);
1091 if (miscintcount++ < 10) {
1092 XXDEBUG(("bmac_misc_intr\n"));
1094 /* XXDEBUG(("bmac_misc_intr, status=%#08x\n", status)); */
1095 /* bmac_txdma_intr_inner(irq, dev_id, regs); */
1096 /* if (status & FrameReceived) bp->stats.rx_dropped++; */
1097 if (status & RxErrorMask) bp->stats.rx_errors++;
1098 if (status & RxCRCCntExp) bp->stats.rx_crc_errors++;
1099 if (status & RxLenCntExp) bp->stats.rx_length_errors++;
1100 if (status & RxOverFlow) bp->stats.rx_over_errors++;
1101 if (status & RxAlignCntExp) bp->stats.rx_frame_errors++;
1103 /* if (status & FrameSent) bp->stats.tx_dropped++; */
1104 if (status & TxErrorMask) bp->stats.tx_errors++;
1105 if (status & TxUnderrun) bp->stats.tx_fifo_errors++;
1106 if (status & TxNormalCollExp) bp->stats.collisions++;
1111 * Procedure for reading EEPROM
1113 #define SROMAddressLength 5
1114 #define DataInOn 0x0008
1115 #define DataInOff 0x0000
1117 #define ChipSelect 0x0001
1118 #define SDIShiftCount 3
1119 #define SD0ShiftCount 2
1120 #define DelayValue 1000 /* number of microseconds */
1121 #define SROMStartOffset 10 /* this is in words */
1122 #define SROMReadCount 3 /* number of words to read from SROM */
1123 #define SROMAddressBits 6
1124 #define EnetAddressOffset 20
1126 static unsigned char
1127 bmac_clock_out_bit(struct net_device *dev)
1129 unsigned short data;
1132 bmwrite(dev, SROMCSR, ChipSelect | Clk);
1135 data = bmread(dev, SROMCSR);
1137 val = (data >> SD0ShiftCount) & 1;
1139 bmwrite(dev, SROMCSR, ChipSelect);
1146 bmac_clock_in_bit(struct net_device *dev, unsigned int val)
1148 unsigned short data;
1150 if (val != 0 && val != 1) return;
1152 data = (val << SDIShiftCount);
1153 bmwrite(dev, SROMCSR, data | ChipSelect );
1156 bmwrite(dev, SROMCSR, data | ChipSelect | Clk );
1159 bmwrite(dev, SROMCSR, data | ChipSelect);
1164 reset_and_select_srom(struct net_device *dev)
1167 bmwrite(dev, SROMCSR, 0);
1170 /* send it the read command (110) */
1171 bmac_clock_in_bit(dev, 1);
1172 bmac_clock_in_bit(dev, 1);
1173 bmac_clock_in_bit(dev, 0);
1176 static unsigned short
1177 read_srom(struct net_device *dev, unsigned int addr, unsigned int addr_len)
1179 unsigned short data, val;
1182 /* send out the address we want to read from */
1183 for (i = 0; i < addr_len; i++) {
1184 val = addr >> (addr_len-i-1);
1185 bmac_clock_in_bit(dev, val & 1);
1188 /* Now read in the 16-bit data */
1190 for (i = 0; i < 16; i++) {
1191 val = bmac_clock_out_bit(dev);
1195 bmwrite(dev, SROMCSR, 0);
1201 * It looks like Cogent and SMC use different methods for calculating
1202 * checksums. What a pain..
1206 bmac_verify_checksum(struct net_device *dev)
1208 unsigned short data, storedCS;
1210 reset_and_select_srom(dev);
1211 data = read_srom(dev, 3, SROMAddressBits);
1212 storedCS = ((data >> 8) & 0x0ff) | ((data << 8) & 0xff00);
1219 bmac_get_station_address(struct net_device *dev, unsigned char *ea)
1222 unsigned short data;
1224 for (i = 0; i < 6; i++)
1226 reset_and_select_srom(dev);
1227 data = read_srom(dev, i + EnetAddressOffset/2, SROMAddressBits);
1228 ea[2*i] = bitrev(data & 0x0ff);
1229 ea[2*i+1] = bitrev((data >> 8) & 0x0ff);
1233 static void bmac_reset_and_enable(struct net_device *dev)
1235 struct bmac_data *bp = netdev_priv(dev);
1236 unsigned long flags;
1237 struct sk_buff *skb;
1238 unsigned char *data;
1240 spin_lock_irqsave(&bp->lock, flags);
1241 bmac_enable_and_reset_chip(dev);
1242 bmac_init_tx_ring(bp);
1243 bmac_init_rx_ring(bp);
1244 bmac_init_chip(dev);
1245 bmac_start_chip(dev);
1246 bmwrite(dev, INTDISABLE, EnableNormal);
1250 * It seems that the bmac can't receive until it's transmitted
1251 * a packet. So we give it a dummy packet to transmit.
1253 skb = dev_alloc_skb(ETHERMINPACKET);
1255 data = skb_put(skb, ETHERMINPACKET);
1256 memset(data, 0, ETHERMINPACKET);
1257 memcpy(data, dev->dev_addr, 6);
1258 memcpy(data+6, dev->dev_addr, 6);
1259 bmac_transmit_packet(skb, dev);
1261 spin_unlock_irqrestore(&bp->lock, flags);
1264 static int __devinit bmac_probe(struct macio_dev *mdev, const struct of_match *match)
1267 struct bmac_data *bp;
1268 unsigned char *addr;
1269 struct net_device *dev;
1270 int is_bmac_plus = ((int)match->data) != 0;
1272 if (macio_resource_count(mdev) != 3 || macio_irq_count(mdev) != 3) {
1273 printk(KERN_ERR "BMAC: can't use, need 3 addrs and 3 intrs\n");
1276 addr = get_property(macio_get_of_node(mdev), "mac-address", NULL);
1278 addr = get_property(macio_get_of_node(mdev), "local-mac-address", NULL);
1280 printk(KERN_ERR "BMAC: Can't get mac-address\n");
1285 dev = alloc_etherdev(PRIV_BYTES);
1287 printk(KERN_ERR "BMAC: alloc_etherdev failed, out of memory\n");
1291 bp = netdev_priv(dev);
1292 SET_MODULE_OWNER(dev);
1293 SET_NETDEV_DEV(dev, &mdev->ofdev.dev);
1294 macio_set_drvdata(mdev, dev);
1297 spin_lock_init(&bp->lock);
1299 if (macio_request_resources(mdev, "bmac")) {
1300 printk(KERN_ERR "BMAC: can't request IO resource !\n");
1304 dev->base_addr = (unsigned long)
1305 ioremap(macio_resource_start(mdev, 0), macio_resource_len(mdev, 0));
1306 if (dev->base_addr == 0)
1309 dev->irq = macio_irq(mdev, 0);
1311 bmac_enable_and_reset_chip(dev);
1312 bmwrite(dev, INTDISABLE, DisableAll);
1314 rev = addr[0] == 0 && addr[1] == 0xA0;
1315 for (j = 0; j < 6; ++j)
1316 dev->dev_addr[j] = rev? bitrev(addr[j]): addr[j];
1318 /* Enable chip without interrupts for now */
1319 bmac_enable_and_reset_chip(dev);
1320 bmwrite(dev, INTDISABLE, DisableAll);
1322 dev->open = bmac_open;
1323 dev->stop = bmac_close;
1324 dev->hard_start_xmit = bmac_output;
1325 dev->get_stats = bmac_stats;
1326 dev->set_multicast_list = bmac_set_multicast;
1327 dev->set_mac_address = bmac_set_address;
1329 bmac_get_station_address(dev, addr);
1330 if (bmac_verify_checksum(dev) != 0)
1331 goto err_out_iounmap;
1333 bp->is_bmac_plus = is_bmac_plus;
1334 bp->tx_dma = ioremap(macio_resource_start(mdev, 1), macio_resource_len(mdev, 1));
1336 goto err_out_iounmap;
1337 bp->tx_dma_intr = macio_irq(mdev, 1);
1338 bp->rx_dma = ioremap(macio_resource_start(mdev, 2), macio_resource_len(mdev, 2));
1340 goto err_out_iounmap_tx;
1341 bp->rx_dma_intr = macio_irq(mdev, 2);
1343 bp->tx_cmds = (volatile struct dbdma_cmd *) DBDMA_ALIGN(bp + 1);
1344 bp->rx_cmds = bp->tx_cmds + N_TX_RING + 1;
1346 bp->queue = (struct sk_buff_head *)(bp->rx_cmds + N_RX_RING + 1);
1347 skb_queue_head_init(bp->queue);
1349 init_timer(&bp->tx_timeout);
1351 ret = request_irq(dev->irq, bmac_misc_intr, 0, "BMAC-misc", dev);
1353 printk(KERN_ERR "BMAC: can't get irq %d\n", dev->irq);
1354 goto err_out_iounmap_rx;
1356 ret = request_irq(bp->tx_dma_intr, bmac_txdma_intr, 0, "BMAC-txdma", dev);
1358 printk(KERN_ERR "BMAC: can't get irq %d\n", bp->tx_dma_intr);
1361 ret = request_irq(bp->rx_dma_intr, bmac_rxdma_intr, 0, "BMAC-rxdma", dev);
1363 printk(KERN_ERR "BMAC: can't get irq %d\n", bp->rx_dma_intr);
1367 /* Mask chip interrupts and disable chip, will be
1368 * re-enabled on open()
1370 disable_irq(dev->irq);
1371 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
1373 if (register_netdev(dev) != 0) {
1374 printk(KERN_ERR "BMAC: Ethernet registration failed\n");
1378 printk(KERN_INFO "%s: BMAC%s at", dev->name, (is_bmac_plus? "+": ""));
1379 for (j = 0; j < 6; ++j)
1380 printk("%c%.2x", (j? ':': ' '), dev->dev_addr[j]);
1381 XXDEBUG((", base_addr=%#0lx", dev->base_addr));
1387 free_irq(bp->rx_dma_intr, dev);
1389 free_irq(bp->tx_dma_intr, dev);
1391 free_irq(dev->irq, dev);
1393 iounmap(bp->rx_dma);
1395 iounmap(bp->tx_dma);
1397 iounmap((void __iomem *)dev->base_addr);
1399 macio_release_resources(mdev);
1401 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
1407 static int bmac_open(struct net_device *dev)
1409 struct bmac_data *bp = netdev_priv(dev);
1410 /* XXDEBUG(("bmac: enter open\n")); */
1411 /* reset the chip */
1413 bmac_reset_and_enable(dev);
1414 enable_irq(dev->irq);
1418 static int bmac_close(struct net_device *dev)
1420 struct bmac_data *bp = netdev_priv(dev);
1421 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
1422 volatile struct dbdma_regs __iomem *td = bp->tx_dma;
1423 unsigned short config;
1428 /* disable rx and tx */
1429 config = bmread(dev, RXCFG);
1430 bmwrite(dev, RXCFG, (config & ~RxMACEnable));
1432 config = bmread(dev, TXCFG);
1433 bmwrite(dev, TXCFG, (config & ~TxMACEnable));
1435 bmwrite(dev, INTDISABLE, DisableAll); /* disable all intrs */
1437 /* disable rx and tx dma */
1438 st_le32(&rd->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
1439 st_le32(&td->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
1441 /* free some skb's */
1442 XXDEBUG(("bmac: free rx bufs\n"));
1443 for (i=0; i<N_RX_RING; i++) {
1444 if (bp->rx_bufs[i] != NULL) {
1445 dev_kfree_skb(bp->rx_bufs[i]);
1446 bp->rx_bufs[i] = NULL;
1449 XXDEBUG(("bmac: free tx bufs\n"));
1450 for (i = 0; i<N_TX_RING; i++) {
1451 if (bp->tx_bufs[i] != NULL) {
1452 dev_kfree_skb(bp->tx_bufs[i]);
1453 bp->tx_bufs[i] = NULL;
1456 XXDEBUG(("bmac: all bufs freed\n"));
1459 disable_irq(dev->irq);
1460 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
1466 bmac_start(struct net_device *dev)
1468 struct bmac_data *bp = netdev_priv(dev);
1470 struct sk_buff *skb;
1471 unsigned long flags;
1476 spin_lock_irqsave(&bp->lock, flags);
1478 i = bp->tx_fill + 1;
1481 if (i == bp->tx_empty)
1483 skb = skb_dequeue(bp->queue);
1486 bmac_transmit_packet(skb, dev);
1488 spin_unlock_irqrestore(&bp->lock, flags);
1492 bmac_output(struct sk_buff *skb, struct net_device *dev)
1494 struct bmac_data *bp = netdev_priv(dev);
1495 skb_queue_tail(bp->queue, skb);
1500 static void bmac_tx_timeout(unsigned long data)
1502 struct net_device *dev = (struct net_device *) data;
1503 struct bmac_data *bp = netdev_priv(dev);
1504 volatile struct dbdma_regs __iomem *td = bp->tx_dma;
1505 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
1506 volatile struct dbdma_cmd *cp;
1507 unsigned long flags;
1508 unsigned short config, oldConfig;
1511 XXDEBUG(("bmac: tx_timeout called\n"));
1512 spin_lock_irqsave(&bp->lock, flags);
1513 bp->timeout_active = 0;
1515 /* update various counters */
1516 /* bmac_handle_misc_intrs(bp, 0); */
1518 cp = &bp->tx_cmds[bp->tx_empty];
1519 /* XXDEBUG((KERN_DEBUG "bmac: tx dmastat=%x %x runt=%d pr=%x fs=%x fc=%x\n", */
1520 /* ld_le32(&td->status), ld_le16(&cp->xfer_status), bp->tx_bad_runt, */
1521 /* mb->pr, mb->xmtfs, mb->fifofc)); */
1523 /* turn off both tx and rx and reset the chip */
1524 config = bmread(dev, RXCFG);
1525 bmwrite(dev, RXCFG, (config & ~RxMACEnable));
1526 config = bmread(dev, TXCFG);
1527 bmwrite(dev, TXCFG, (config & ~TxMACEnable));
1528 out_le32(&td->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE|ACTIVE|DEAD));
1529 printk(KERN_ERR "bmac: transmit timeout - resetting\n");
1530 bmac_enable_and_reset_chip(dev);
1532 /* restart rx dma */
1533 cp = bus_to_virt(ld_le32(&rd->cmdptr));
1534 out_le32(&rd->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE|ACTIVE|DEAD));
1535 out_le16(&cp->xfer_status, 0);
1536 out_le32(&rd->cmdptr, virt_to_bus(cp));
1537 out_le32(&rd->control, DBDMA_SET(RUN|WAKE));
1539 /* fix up the transmit side */
1540 XXDEBUG((KERN_DEBUG "bmac: tx empty=%d fill=%d fullup=%d\n",
1541 bp->tx_empty, bp->tx_fill, bp->tx_fullup));
1543 ++bp->stats.tx_errors;
1544 if (i != bp->tx_fill) {
1545 dev_kfree_skb(bp->tx_bufs[i]);
1546 bp->tx_bufs[i] = NULL;
1547 if (++i >= N_TX_RING) i = 0;
1551 netif_wake_queue(dev);
1552 if (i != bp->tx_fill) {
1553 cp = &bp->tx_cmds[i];
1554 out_le16(&cp->xfer_status, 0);
1555 out_le16(&cp->command, OUTPUT_LAST);
1556 out_le32(&td->cmdptr, virt_to_bus(cp));
1557 out_le32(&td->control, DBDMA_SET(RUN));
1558 /* bmac_set_timeout(dev); */
1559 XXDEBUG((KERN_DEBUG "bmac: starting %d\n", i));
1562 /* turn it back on */
1563 oldConfig = bmread(dev, RXCFG);
1564 bmwrite(dev, RXCFG, oldConfig | RxMACEnable );
1565 oldConfig = bmread(dev, TXCFG);
1566 bmwrite(dev, TXCFG, oldConfig | TxMACEnable );
1568 spin_unlock_irqrestore(&bp->lock, flags);
1572 static void dump_dbdma(volatile struct dbdma_cmd *cp,int count)
1576 for (i=0;i< count;i++) {
1579 printk("dbdma req 0x%x addr 0x%x baddr 0x%x xfer/res 0x%x\n",
1591 bmac_proc_info(char *buffer, char **start, off_t offset, int length)
1598 if (bmac_devs == NULL)
1601 len += sprintf(buffer, "BMAC counters & registers\n");
1603 for (i = 0; i<N_REG_ENTRIES; i++) {
1604 len += sprintf(buffer + len, "%s: %#08x\n",
1605 reg_entries[i].name,
1606 bmread(bmac_devs, reg_entries[i].reg_offset));
1614 if (pos > offset+length) break;
1617 *start = buffer + (offset - begin);
1618 len -= (offset - begin);
1620 if (len > length) len = length;
1626 static int __devexit bmac_remove(struct macio_dev *mdev)
1628 struct net_device *dev = macio_get_drvdata(mdev);
1629 struct bmac_data *bp = netdev_priv(dev);
1631 unregister_netdev(dev);
1633 free_irq(dev->irq, dev);
1634 free_irq(bp->tx_dma_intr, dev);
1635 free_irq(bp->rx_dma_intr, dev);
1637 iounmap((void __iomem *)dev->base_addr);
1638 iounmap(bp->tx_dma);
1639 iounmap(bp->rx_dma);
1641 macio_release_resources(mdev);
1648 static struct of_match bmac_match[] =
1652 .type = OF_ANY_MATCH,
1653 .compatible = OF_ANY_MATCH,
1657 .name = OF_ANY_MATCH,
1659 .compatible = "bmac+",
1665 static struct macio_driver bmac_driver =
1668 .match_table = bmac_match,
1669 .probe = bmac_probe,
1670 .remove = bmac_remove,
1672 .suspend = bmac_suspend,
1673 .resume = bmac_resume,
1678 static int __init bmac_init(void)
1680 if (bmac_emergency_rxbuf == NULL) {
1681 bmac_emergency_rxbuf = kmalloc(RX_BUFLEN, GFP_KERNEL);
1682 if (bmac_emergency_rxbuf == NULL) {
1683 printk(KERN_ERR "BMAC: can't allocate emergency RX buffer\n");
1688 return macio_register_driver(&bmac_driver);
1691 static void __exit bmac_exit(void)
1693 macio_unregister_driver(&bmac_driver);
1695 if (bmac_emergency_rxbuf != NULL) {
1696 kfree(bmac_emergency_rxbuf);
1697 bmac_emergency_rxbuf = NULL;
1701 MODULE_AUTHOR("Randy Gobbel/Paul Mackerras");
1702 MODULE_DESCRIPTION("PowerMac BMAC ethernet driver.");
1703 MODULE_LICENSE("GPL");
1705 module_init(bmac_init);
1706 module_exit(bmac_exit);