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/module.h>
11 #include <linux/kernel.h>
12 #include <linux/netdevice.h>
13 #include <linux/etherdevice.h>
14 #include <linux/delay.h>
15 #include <linux/string.h>
16 #include <linux/timer.h>
17 #include <linux/proc_fs.h>
18 #include <linux/init.h>
19 #include <linux/spinlock.h>
20 #include <linux/crc32.h>
21 #include <linux/bitrev.h>
22 #include <linux/ethtool.h>
24 #include <asm/dbdma.h>
27 #include <asm/pgtable.h>
28 #include <asm/machdep.h>
29 #include <asm/pmac_feature.h>
30 #include <asm/macio.h>
35 #define trunc_page(x) ((void *)(((unsigned long)(x)) & ~((unsigned long)(PAGE_SIZE - 1))))
36 #define round_page(x) trunc_page(((unsigned long)(x)) + ((unsigned long)(PAGE_SIZE - 1)))
39 * CRC polynomial - used in working out multicast filter bits.
41 #define ENET_CRCPOLY 0x04c11db7
43 /* switch to use multicast code lifted from sunhme driver */
44 #define SUNHME_MULTICAST
48 #define MAX_TX_ACTIVE 1
50 #define ETHERMINPACKET 64
52 #define RX_BUFLEN (ETHERMTU + 14 + ETHERCRC + 2)
53 #define TX_TIMEOUT HZ /* 1 second */
55 /* Bits in transmit DMA status */
56 #define TX_DMA_ERR 0x80
61 /* volatile struct bmac *bmac; */
62 struct sk_buff_head *queue;
63 volatile struct dbdma_regs __iomem *tx_dma;
65 volatile struct dbdma_regs __iomem *rx_dma;
67 volatile struct dbdma_cmd *tx_cmds; /* xmit dma command list */
68 volatile struct dbdma_cmd *rx_cmds; /* recv dma command list */
69 struct macio_dev *mdev;
71 struct sk_buff *rx_bufs[N_RX_RING];
74 struct sk_buff *tx_bufs[N_TX_RING];
77 unsigned char tx_fullup;
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 int bmac_open(struct net_device *dev);
145 static int bmac_close(struct net_device *dev);
146 static int bmac_transmit_packet(struct sk_buff *skb, struct net_device *dev);
147 static void bmac_set_multicast(struct net_device *dev);
148 static void bmac_reset_and_enable(struct net_device *dev);
149 static void bmac_start_chip(struct net_device *dev);
150 static void bmac_init_chip(struct net_device *dev);
151 static void bmac_init_registers(struct net_device *dev);
152 static void bmac_enable_and_reset_chip(struct net_device *dev);
153 static int bmac_set_address(struct net_device *dev, void *addr);
154 static irqreturn_t bmac_misc_intr(int irq, void *dev_id);
155 static irqreturn_t bmac_txdma_intr(int irq, void *dev_id);
156 static irqreturn_t bmac_rxdma_intr(int irq, void *dev_id);
157 static void bmac_set_timeout(struct net_device *dev);
158 static void bmac_tx_timeout(unsigned long data);
159 static int bmac_output(struct sk_buff *skb, struct net_device *dev);
160 static void bmac_start(struct net_device *dev);
162 #define DBDMA_SET(x) ( ((x) | (x) << 16) )
163 #define DBDMA_CLEAR(x) ( (x) << 16)
166 dbdma_st32(volatile __u32 __iomem *a, unsigned long x)
168 __asm__ volatile( "stwbrx %0,0,%1" : : "r" (x), "r" (a) : "memory");
172 static inline unsigned long
173 dbdma_ld32(volatile __u32 __iomem *a)
176 __asm__ volatile ("lwbrx %0,0,%1" : "=r" (swap) : "r" (a));
181 dbdma_continue(volatile struct dbdma_regs __iomem *dmap)
183 dbdma_st32(&dmap->control,
184 DBDMA_SET(RUN|WAKE) | DBDMA_CLEAR(PAUSE|DEAD));
189 dbdma_reset(volatile struct dbdma_regs __iomem *dmap)
191 dbdma_st32(&dmap->control,
192 DBDMA_CLEAR(ACTIVE|DEAD|WAKE|FLUSH|PAUSE|RUN));
194 while (dbdma_ld32(&dmap->status) & RUN)
199 dbdma_setcmd(volatile struct dbdma_cmd *cp,
200 unsigned short cmd, unsigned count, unsigned long addr,
201 unsigned long cmd_dep)
203 out_le16(&cp->command, cmd);
204 out_le16(&cp->req_count, count);
205 out_le32(&cp->phy_addr, addr);
206 out_le32(&cp->cmd_dep, cmd_dep);
207 out_le16(&cp->xfer_status, 0);
208 out_le16(&cp->res_count, 0);
212 void bmwrite(struct net_device *dev, unsigned long reg_offset, unsigned data )
214 out_le16((void __iomem *)dev->base_addr + reg_offset, data);
219 unsigned short bmread(struct net_device *dev, unsigned long reg_offset )
221 return in_le16((void __iomem *)dev->base_addr + reg_offset);
225 bmac_enable_and_reset_chip(struct net_device *dev)
227 struct bmac_data *bp = netdev_priv(dev);
228 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
229 volatile struct dbdma_regs __iomem *td = bp->tx_dma;
236 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 1);
239 #define MIFDELAY udelay(10)
242 bmac_mif_readbits(struct net_device *dev, int nb)
244 unsigned int val = 0;
247 bmwrite(dev, MIFCSR, 0);
249 if (bmread(dev, MIFCSR) & 8)
251 bmwrite(dev, MIFCSR, 1);
254 bmwrite(dev, MIFCSR, 0);
256 bmwrite(dev, MIFCSR, 1);
262 bmac_mif_writebits(struct net_device *dev, unsigned int val, int nb)
267 b = (val & (1 << nb))? 6: 4;
268 bmwrite(dev, MIFCSR, b);
270 bmwrite(dev, MIFCSR, b|1);
276 bmac_mif_read(struct net_device *dev, unsigned int addr)
280 bmwrite(dev, MIFCSR, 4);
282 bmac_mif_writebits(dev, ~0U, 32);
283 bmac_mif_writebits(dev, 6, 4);
284 bmac_mif_writebits(dev, addr, 10);
285 bmwrite(dev, MIFCSR, 2);
287 bmwrite(dev, MIFCSR, 1);
289 val = bmac_mif_readbits(dev, 17);
290 bmwrite(dev, MIFCSR, 4);
296 bmac_mif_write(struct net_device *dev, unsigned int addr, unsigned int val)
298 bmwrite(dev, MIFCSR, 4);
300 bmac_mif_writebits(dev, ~0U, 32);
301 bmac_mif_writebits(dev, 5, 4);
302 bmac_mif_writebits(dev, addr, 10);
303 bmac_mif_writebits(dev, 2, 2);
304 bmac_mif_writebits(dev, val, 16);
305 bmac_mif_writebits(dev, 3, 2);
309 bmac_init_registers(struct net_device *dev)
311 struct bmac_data *bp = netdev_priv(dev);
312 volatile unsigned short regValue;
313 unsigned short *pWord16;
316 /* XXDEBUG(("bmac: enter init_registers\n")); */
318 bmwrite(dev, RXRST, RxResetValue);
319 bmwrite(dev, TXRST, TxResetBit);
325 regValue = bmread(dev, TXRST); /* wait for reset to clear..acknowledge */
326 } while ((regValue & TxResetBit) && i > 0);
328 if (!bp->is_bmac_plus) {
329 regValue = bmread(dev, XCVRIF);
330 regValue |= ClkBit | SerialMode | COLActiveLow;
331 bmwrite(dev, XCVRIF, regValue);
335 bmwrite(dev, RSEED, (unsigned short)0x1968);
337 regValue = bmread(dev, XIFC);
338 regValue |= TxOutputEnable;
339 bmwrite(dev, XIFC, regValue);
343 /* set collision counters to 0 */
344 bmwrite(dev, NCCNT, 0);
345 bmwrite(dev, NTCNT, 0);
346 bmwrite(dev, EXCNT, 0);
347 bmwrite(dev, LTCNT, 0);
349 /* set rx counters to 0 */
350 bmwrite(dev, FRCNT, 0);
351 bmwrite(dev, LECNT, 0);
352 bmwrite(dev, AECNT, 0);
353 bmwrite(dev, FECNT, 0);
354 bmwrite(dev, RXCV, 0);
356 /* set tx fifo information */
357 bmwrite(dev, TXTH, 4); /* 4 octets before tx starts */
359 bmwrite(dev, TXFIFOCSR, 0); /* first disable txFIFO */
360 bmwrite(dev, TXFIFOCSR, TxFIFOEnable );
362 /* set rx fifo information */
363 bmwrite(dev, RXFIFOCSR, 0); /* first disable rxFIFO */
364 bmwrite(dev, RXFIFOCSR, RxFIFOEnable );
366 //bmwrite(dev, TXCFG, TxMACEnable); /* TxNeverGiveUp maybe later */
367 bmread(dev, STATUS); /* read it just to clear it */
369 /* zero out the chip Hash Filter registers */
370 for (i=0; i<4; i++) bp->hash_table_mask[i] = 0;
371 bmwrite(dev, BHASH3, bp->hash_table_mask[0]); /* bits 15 - 0 */
372 bmwrite(dev, BHASH2, bp->hash_table_mask[1]); /* bits 31 - 16 */
373 bmwrite(dev, BHASH1, bp->hash_table_mask[2]); /* bits 47 - 32 */
374 bmwrite(dev, BHASH0, bp->hash_table_mask[3]); /* bits 63 - 48 */
376 pWord16 = (unsigned short *)dev->dev_addr;
377 bmwrite(dev, MADD0, *pWord16++);
378 bmwrite(dev, MADD1, *pWord16++);
379 bmwrite(dev, MADD2, *pWord16);
381 bmwrite(dev, RXCFG, RxCRCNoStrip | RxHashFilterEnable | RxRejectOwnPackets);
383 bmwrite(dev, INTDISABLE, EnableNormal);
390 bmac_disable_interrupts(struct net_device *dev)
392 bmwrite(dev, INTDISABLE, DisableAll);
396 bmac_enable_interrupts(struct net_device *dev)
398 bmwrite(dev, INTDISABLE, EnableNormal);
404 bmac_start_chip(struct net_device *dev)
406 struct bmac_data *bp = netdev_priv(dev);
407 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
408 unsigned short oldConfig;
410 /* enable rx dma channel */
413 oldConfig = bmread(dev, TXCFG);
414 bmwrite(dev, TXCFG, oldConfig | TxMACEnable );
416 /* turn on rx plus any other bits already on (promiscuous possibly) */
417 oldConfig = bmread(dev, RXCFG);
418 bmwrite(dev, RXCFG, oldConfig | RxMACEnable );
423 bmac_init_phy(struct net_device *dev)
426 struct bmac_data *bp = netdev_priv(dev);
428 printk(KERN_DEBUG "phy registers:");
429 for (addr = 0; addr < 32; ++addr) {
431 printk("\n" KERN_DEBUG);
432 printk(" %.4x", bmac_mif_read(dev, addr));
435 if (bp->is_bmac_plus) {
436 unsigned int capable, ctrl;
438 ctrl = bmac_mif_read(dev, 0);
439 capable = ((bmac_mif_read(dev, 1) & 0xf800) >> 6) | 1;
440 if (bmac_mif_read(dev, 4) != capable
441 || (ctrl & 0x1000) == 0) {
442 bmac_mif_write(dev, 4, capable);
443 bmac_mif_write(dev, 0, 0x1200);
445 bmac_mif_write(dev, 0, 0x1000);
449 static void bmac_init_chip(struct net_device *dev)
452 bmac_init_registers(dev);
456 static int bmac_suspend(struct macio_dev *mdev, pm_message_t state)
458 struct net_device* dev = macio_get_drvdata(mdev);
459 struct bmac_data *bp = netdev_priv(dev);
461 unsigned short config;
464 netif_device_detach(dev);
465 /* prolly should wait for dma to finish & turn off the chip */
466 spin_lock_irqsave(&bp->lock, flags);
467 if (bp->timeout_active) {
468 del_timer(&bp->tx_timeout);
469 bp->timeout_active = 0;
471 disable_irq(dev->irq);
472 disable_irq(bp->tx_dma_intr);
473 disable_irq(bp->rx_dma_intr);
475 spin_unlock_irqrestore(&bp->lock, flags);
477 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
478 volatile struct dbdma_regs __iomem *td = bp->tx_dma;
480 config = bmread(dev, RXCFG);
481 bmwrite(dev, RXCFG, (config & ~RxMACEnable));
482 config = bmread(dev, TXCFG);
483 bmwrite(dev, TXCFG, (config & ~TxMACEnable));
484 bmwrite(dev, INTDISABLE, DisableAll); /* disable all intrs */
485 /* disable rx and tx dma */
486 st_le32(&rd->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
487 st_le32(&td->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
488 /* free some skb's */
489 for (i=0; i<N_RX_RING; i++) {
490 if (bp->rx_bufs[i] != NULL) {
491 dev_kfree_skb(bp->rx_bufs[i]);
492 bp->rx_bufs[i] = NULL;
495 for (i = 0; i<N_TX_RING; i++) {
496 if (bp->tx_bufs[i] != NULL) {
497 dev_kfree_skb(bp->tx_bufs[i]);
498 bp->tx_bufs[i] = NULL;
502 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
506 static int bmac_resume(struct macio_dev *mdev)
508 struct net_device* dev = macio_get_drvdata(mdev);
509 struct bmac_data *bp = netdev_priv(dev);
511 /* see if this is enough */
513 bmac_reset_and_enable(dev);
515 enable_irq(dev->irq);
516 enable_irq(bp->tx_dma_intr);
517 enable_irq(bp->rx_dma_intr);
518 netif_device_attach(dev);
522 #endif /* CONFIG_PM */
524 static int bmac_set_address(struct net_device *dev, void *addr)
526 struct bmac_data *bp = netdev_priv(dev);
527 unsigned char *p = addr;
528 unsigned short *pWord16;
532 XXDEBUG(("bmac: enter set_address\n"));
533 spin_lock_irqsave(&bp->lock, flags);
535 for (i = 0; i < 6; ++i) {
536 dev->dev_addr[i] = p[i];
538 /* load up the hardware address */
539 pWord16 = (unsigned short *)dev->dev_addr;
540 bmwrite(dev, MADD0, *pWord16++);
541 bmwrite(dev, MADD1, *pWord16++);
542 bmwrite(dev, MADD2, *pWord16);
544 spin_unlock_irqrestore(&bp->lock, flags);
545 XXDEBUG(("bmac: exit set_address\n"));
549 static inline void bmac_set_timeout(struct net_device *dev)
551 struct bmac_data *bp = netdev_priv(dev);
554 spin_lock_irqsave(&bp->lock, flags);
555 if (bp->timeout_active)
556 del_timer(&bp->tx_timeout);
557 bp->tx_timeout.expires = jiffies + TX_TIMEOUT;
558 bp->tx_timeout.function = bmac_tx_timeout;
559 bp->tx_timeout.data = (unsigned long) dev;
560 add_timer(&bp->tx_timeout);
561 bp->timeout_active = 1;
562 spin_unlock_irqrestore(&bp->lock, flags);
566 bmac_construct_xmt(struct sk_buff *skb, volatile struct dbdma_cmd *cp)
574 baddr = virt_to_bus(vaddr);
576 dbdma_setcmd(cp, (OUTPUT_LAST | INTR_ALWAYS | WAIT_IFCLR), len, baddr, 0);
580 bmac_construct_rxbuff(struct sk_buff *skb, volatile struct dbdma_cmd *cp)
582 unsigned char *addr = skb? skb->data: bmac_emergency_rxbuf;
584 dbdma_setcmd(cp, (INPUT_LAST | INTR_ALWAYS), RX_BUFLEN,
585 virt_to_bus(addr), 0);
589 bmac_init_tx_ring(struct bmac_data *bp)
591 volatile struct dbdma_regs __iomem *td = bp->tx_dma;
593 memset((char *)bp->tx_cmds, 0, (N_TX_RING+1) * sizeof(struct dbdma_cmd));
599 /* put a branch at the end of the tx command list */
600 dbdma_setcmd(&bp->tx_cmds[N_TX_RING],
601 (DBDMA_NOP | BR_ALWAYS), 0, 0, virt_to_bus(bp->tx_cmds));
605 out_le32(&td->wait_sel, 0x00200020);
606 out_le32(&td->cmdptr, virt_to_bus(bp->tx_cmds));
610 bmac_init_rx_ring(struct bmac_data *bp)
612 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
616 /* initialize list of sk_buffs for receiving and set up recv dma */
617 memset((char *)bp->rx_cmds, 0,
618 (N_RX_RING + 1) * sizeof(struct dbdma_cmd));
619 for (i = 0; i < N_RX_RING; i++) {
620 if ((skb = bp->rx_bufs[i]) == NULL) {
621 bp->rx_bufs[i] = skb = dev_alloc_skb(RX_BUFLEN+2);
625 bmac_construct_rxbuff(skb, &bp->rx_cmds[i]);
631 /* Put a branch back to the beginning of the receive command list */
632 dbdma_setcmd(&bp->rx_cmds[N_RX_RING],
633 (DBDMA_NOP | BR_ALWAYS), 0, 0, virt_to_bus(bp->rx_cmds));
637 out_le32(&rd->cmdptr, virt_to_bus(bp->rx_cmds));
643 static int bmac_transmit_packet(struct sk_buff *skb, struct net_device *dev)
645 struct bmac_data *bp = netdev_priv(dev);
646 volatile struct dbdma_regs __iomem *td = bp->tx_dma;
649 /* see if there's a free slot in the tx ring */
650 /* XXDEBUG(("bmac_xmit_start: empty=%d fill=%d\n", */
651 /* bp->tx_empty, bp->tx_fill)); */
655 if (i == bp->tx_empty) {
656 netif_stop_queue(dev);
658 XXDEBUG(("bmac_transmit_packet: tx ring full\n"));
659 return -1; /* can't take it at the moment */
662 dbdma_setcmd(&bp->tx_cmds[i], DBDMA_STOP, 0, 0, 0);
664 bmac_construct_xmt(skb, &bp->tx_cmds[bp->tx_fill]);
666 bp->tx_bufs[bp->tx_fill] = skb;
669 dev->stats.tx_bytes += skb->len;
676 static int rxintcount;
678 static irqreturn_t bmac_rxdma_intr(int irq, void *dev_id)
680 struct net_device *dev = (struct net_device *) dev_id;
681 struct bmac_data *bp = netdev_priv(dev);
682 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
683 volatile struct dbdma_cmd *cp;
686 unsigned int residual;
690 spin_lock_irqsave(&bp->lock, flags);
692 if (++rxintcount < 10) {
693 XXDEBUG(("bmac_rxdma_intr\n"));
700 cp = &bp->rx_cmds[i];
701 stat = ld_le16(&cp->xfer_status);
702 residual = ld_le16(&cp->res_count);
703 if ((stat & ACTIVE) == 0)
705 nb = RX_BUFLEN - residual - 2;
706 if (nb < (ETHERMINPACKET - ETHERCRC)) {
708 dev->stats.rx_length_errors++;
709 dev->stats.rx_errors++;
711 skb = bp->rx_bufs[i];
712 bp->rx_bufs[i] = NULL;
717 skb->protocol = eth_type_trans(skb, dev);
719 ++dev->stats.rx_packets;
720 dev->stats.rx_bytes += nb;
722 ++dev->stats.rx_dropped;
724 if ((skb = bp->rx_bufs[i]) == NULL) {
725 bp->rx_bufs[i] = skb = dev_alloc_skb(RX_BUFLEN+2);
727 skb_reserve(bp->rx_bufs[i], 2);
729 bmac_construct_rxbuff(skb, &bp->rx_cmds[i]);
730 st_le16(&cp->res_count, 0);
731 st_le16(&cp->xfer_status, 0);
733 if (++i >= N_RX_RING) i = 0;
742 spin_unlock_irqrestore(&bp->lock, flags);
744 if (rxintcount < 10) {
745 XXDEBUG(("bmac_rxdma_intr done\n"));
750 static int txintcount;
752 static irqreturn_t bmac_txdma_intr(int irq, void *dev_id)
754 struct net_device *dev = (struct net_device *) dev_id;
755 struct bmac_data *bp = netdev_priv(dev);
756 volatile struct dbdma_cmd *cp;
760 spin_lock_irqsave(&bp->lock, flags);
762 if (txintcount++ < 10) {
763 XXDEBUG(("bmac_txdma_intr\n"));
766 /* del_timer(&bp->tx_timeout); */
767 /* bp->timeout_active = 0; */
770 cp = &bp->tx_cmds[bp->tx_empty];
771 stat = ld_le16(&cp->xfer_status);
772 if (txintcount < 10) {
773 XXDEBUG(("bmac_txdma_xfer_stat=%#0x\n", stat));
775 if (!(stat & ACTIVE)) {
777 * status field might not have been filled by DBDMA
779 if (cp == bus_to_virt(in_le32(&bp->tx_dma->cmdptr)))
783 if (bp->tx_bufs[bp->tx_empty]) {
784 ++dev->stats.tx_packets;
785 dev_kfree_skb_irq(bp->tx_bufs[bp->tx_empty]);
787 bp->tx_bufs[bp->tx_empty] = NULL;
789 netif_wake_queue(dev);
790 if (++bp->tx_empty >= N_TX_RING)
792 if (bp->tx_empty == bp->tx_fill)
796 spin_unlock_irqrestore(&bp->lock, flags);
798 if (txintcount < 10) {
799 XXDEBUG(("bmac_txdma_intr done->bmac_start\n"));
806 #ifndef SUNHME_MULTICAST
807 /* Real fast bit-reversal algorithm, 6-bit values */
808 static int reverse6[64] = {
809 0x0,0x20,0x10,0x30,0x8,0x28,0x18,0x38,
810 0x4,0x24,0x14,0x34,0xc,0x2c,0x1c,0x3c,
811 0x2,0x22,0x12,0x32,0xa,0x2a,0x1a,0x3a,
812 0x6,0x26,0x16,0x36,0xe,0x2e,0x1e,0x3e,
813 0x1,0x21,0x11,0x31,0x9,0x29,0x19,0x39,
814 0x5,0x25,0x15,0x35,0xd,0x2d,0x1d,0x3d,
815 0x3,0x23,0x13,0x33,0xb,0x2b,0x1b,0x3b,
816 0x7,0x27,0x17,0x37,0xf,0x2f,0x1f,0x3f
820 crc416(unsigned int curval, unsigned short nxtval)
822 register unsigned int counter, cur = curval, next = nxtval;
823 register int high_crc_set, low_data_set;
826 next = ((next & 0x00FF) << 8) | (next >> 8);
828 /* Compute bit-by-bit */
829 for (counter = 0; counter < 16; ++counter) {
830 /* is high CRC bit set? */
831 if ((cur & 0x80000000) == 0) high_crc_set = 0;
832 else high_crc_set = 1;
836 if ((next & 0x0001) == 0) low_data_set = 0;
837 else low_data_set = 1;
842 if (high_crc_set ^ low_data_set) cur = cur ^ ENET_CRCPOLY;
848 bmac_crc(unsigned short *address)
852 XXDEBUG(("bmac_crc: addr=%#04x, %#04x, %#04x\n", *address, address[1], address[2]));
853 newcrc = crc416(0xffffffff, *address); /* address bits 47 - 32 */
854 newcrc = crc416(newcrc, address[1]); /* address bits 31 - 16 */
855 newcrc = crc416(newcrc, address[2]); /* address bits 15 - 0 */
861 * Add requested mcast addr to BMac's hash table filter.
866 bmac_addhash(struct bmac_data *bp, unsigned char *addr)
871 if (!(*addr)) return;
872 crc = bmac_crc((unsigned short *)addr) & 0x3f; /* Big-endian alert! */
873 crc = reverse6[crc]; /* Hyperfast bit-reversing algorithm */
874 if (bp->hash_use_count[crc]++) return; /* This bit is already set */
876 mask = (unsigned char)1 << mask;
877 bp->hash_use_count[crc/16] |= mask;
881 bmac_removehash(struct bmac_data *bp, unsigned char *addr)
886 /* Now, delete the address from the filter copy, as indicated */
887 crc = bmac_crc((unsigned short *)addr) & 0x3f; /* Big-endian alert! */
888 crc = reverse6[crc]; /* Hyperfast bit-reversing algorithm */
889 if (bp->hash_use_count[crc] == 0) return; /* That bit wasn't in use! */
890 if (--bp->hash_use_count[crc]) return; /* That bit is still in use */
892 mask = ((unsigned char)1 << mask) ^ 0xffff; /* To turn off bit */
893 bp->hash_table_mask[crc/16] &= mask;
897 * Sync the adapter with the software copy of the multicast mask
898 * (logical address filter).
902 bmac_rx_off(struct net_device *dev)
904 unsigned short rx_cfg;
906 rx_cfg = bmread(dev, RXCFG);
907 rx_cfg &= ~RxMACEnable;
908 bmwrite(dev, RXCFG, rx_cfg);
910 rx_cfg = bmread(dev, RXCFG);
911 } while (rx_cfg & RxMACEnable);
915 bmac_rx_on(struct net_device *dev, int hash_enable, int promisc_enable)
917 unsigned short rx_cfg;
919 rx_cfg = bmread(dev, RXCFG);
920 rx_cfg |= RxMACEnable;
921 if (hash_enable) rx_cfg |= RxHashFilterEnable;
922 else rx_cfg &= ~RxHashFilterEnable;
923 if (promisc_enable) rx_cfg |= RxPromiscEnable;
924 else rx_cfg &= ~RxPromiscEnable;
925 bmwrite(dev, RXRST, RxResetValue);
926 bmwrite(dev, RXFIFOCSR, 0); /* first disable rxFIFO */
927 bmwrite(dev, RXFIFOCSR, RxFIFOEnable );
928 bmwrite(dev, RXCFG, rx_cfg );
933 bmac_update_hash_table_mask(struct net_device *dev, struct bmac_data *bp)
935 bmwrite(dev, BHASH3, bp->hash_table_mask[0]); /* bits 15 - 0 */
936 bmwrite(dev, BHASH2, bp->hash_table_mask[1]); /* bits 31 - 16 */
937 bmwrite(dev, BHASH1, bp->hash_table_mask[2]); /* bits 47 - 32 */
938 bmwrite(dev, BHASH0, bp->hash_table_mask[3]); /* bits 63 - 48 */
943 bmac_add_multi(struct net_device *dev,
944 struct bmac_data *bp, unsigned char *addr)
946 /* XXDEBUG(("bmac: enter bmac_add_multi\n")); */
947 bmac_addhash(bp, addr);
949 bmac_update_hash_table_mask(dev, bp);
950 bmac_rx_on(dev, 1, (dev->flags & IFF_PROMISC)? 1 : 0);
951 /* XXDEBUG(("bmac: exit bmac_add_multi\n")); */
955 bmac_remove_multi(struct net_device *dev,
956 struct bmac_data *bp, unsigned char *addr)
958 bmac_removehash(bp, addr);
960 bmac_update_hash_table_mask(dev, bp);
961 bmac_rx_on(dev, 1, (dev->flags & IFF_PROMISC)? 1 : 0);
965 /* Set or clear the multicast filter for this adaptor.
966 num_addrs == -1 Promiscuous mode, receive all packets
967 num_addrs == 0 Normal mode, clear multicast list
968 num_addrs > 0 Multicast mode, receive normal and MC packets, and do
969 best-effort filtering.
971 static void bmac_set_multicast(struct net_device *dev)
973 struct dev_mc_list *dmi;
974 struct bmac_data *bp = netdev_priv(dev);
975 int num_addrs = dev->mc_count;
976 unsigned short rx_cfg;
982 XXDEBUG(("bmac: enter bmac_set_multicast, n_addrs=%d\n", num_addrs));
984 if((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 64)) {
985 for (i=0; i<4; i++) bp->hash_table_mask[i] = 0xffff;
986 bmac_update_hash_table_mask(dev, bp);
987 rx_cfg = bmac_rx_on(dev, 1, 0);
988 XXDEBUG(("bmac: all multi, rx_cfg=%#08x\n"));
989 } else if ((dev->flags & IFF_PROMISC) || (num_addrs < 0)) {
990 rx_cfg = bmread(dev, RXCFG);
991 rx_cfg |= RxPromiscEnable;
992 bmwrite(dev, RXCFG, rx_cfg);
993 rx_cfg = bmac_rx_on(dev, 0, 1);
994 XXDEBUG(("bmac: promisc mode enabled, rx_cfg=%#08x\n", rx_cfg));
996 for (i=0; i<4; i++) bp->hash_table_mask[i] = 0;
997 for (i=0; i<64; i++) bp->hash_use_count[i] = 0;
998 if (num_addrs == 0) {
999 rx_cfg = bmac_rx_on(dev, 0, 0);
1000 XXDEBUG(("bmac: multi disabled, rx_cfg=%#08x\n", rx_cfg));
1002 for (dmi=dev->mc_list; dmi!=NULL; dmi=dmi->next)
1003 bmac_addhash(bp, dmi->dmi_addr);
1004 bmac_update_hash_table_mask(dev, bp);
1005 rx_cfg = bmac_rx_on(dev, 1, 0);
1006 XXDEBUG(("bmac: multi enabled, rx_cfg=%#08x\n", rx_cfg));
1009 /* XXDEBUG(("bmac: exit bmac_set_multicast\n")); */
1011 #else /* ifdef SUNHME_MULTICAST */
1013 /* The version of set_multicast below was lifted from sunhme.c */
1015 static void bmac_set_multicast(struct net_device *dev)
1017 struct dev_mc_list *dmi = dev->mc_list;
1020 unsigned short rx_cfg;
1023 if((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 64)) {
1024 bmwrite(dev, BHASH0, 0xffff);
1025 bmwrite(dev, BHASH1, 0xffff);
1026 bmwrite(dev, BHASH2, 0xffff);
1027 bmwrite(dev, BHASH3, 0xffff);
1028 } else if(dev->flags & IFF_PROMISC) {
1029 rx_cfg = bmread(dev, RXCFG);
1030 rx_cfg |= RxPromiscEnable;
1031 bmwrite(dev, RXCFG, rx_cfg);
1035 rx_cfg = bmread(dev, RXCFG);
1036 rx_cfg &= ~RxPromiscEnable;
1037 bmwrite(dev, RXCFG, rx_cfg);
1039 for(i = 0; i < 4; i++) hash_table[i] = 0;
1041 for(i = 0; i < dev->mc_count; i++) {
1042 addrs = dmi->dmi_addr;
1048 crc = ether_crc_le(6, addrs);
1050 hash_table[crc >> 4] |= 1 << (crc & 0xf);
1052 bmwrite(dev, BHASH0, hash_table[0]);
1053 bmwrite(dev, BHASH1, hash_table[1]);
1054 bmwrite(dev, BHASH2, hash_table[2]);
1055 bmwrite(dev, BHASH3, hash_table[3]);
1058 #endif /* SUNHME_MULTICAST */
1060 static int miscintcount;
1062 static irqreturn_t bmac_misc_intr(int irq, void *dev_id)
1064 struct net_device *dev = (struct net_device *) dev_id;
1065 unsigned int status = bmread(dev, STATUS);
1066 if (miscintcount++ < 10) {
1067 XXDEBUG(("bmac_misc_intr\n"));
1069 /* XXDEBUG(("bmac_misc_intr, status=%#08x\n", status)); */
1070 /* bmac_txdma_intr_inner(irq, dev_id); */
1071 /* if (status & FrameReceived) dev->stats.rx_dropped++; */
1072 if (status & RxErrorMask) dev->stats.rx_errors++;
1073 if (status & RxCRCCntExp) dev->stats.rx_crc_errors++;
1074 if (status & RxLenCntExp) dev->stats.rx_length_errors++;
1075 if (status & RxOverFlow) dev->stats.rx_over_errors++;
1076 if (status & RxAlignCntExp) dev->stats.rx_frame_errors++;
1078 /* if (status & FrameSent) dev->stats.tx_dropped++; */
1079 if (status & TxErrorMask) dev->stats.tx_errors++;
1080 if (status & TxUnderrun) dev->stats.tx_fifo_errors++;
1081 if (status & TxNormalCollExp) dev->stats.collisions++;
1086 * Procedure for reading EEPROM
1088 #define SROMAddressLength 5
1089 #define DataInOn 0x0008
1090 #define DataInOff 0x0000
1092 #define ChipSelect 0x0001
1093 #define SDIShiftCount 3
1094 #define SD0ShiftCount 2
1095 #define DelayValue 1000 /* number of microseconds */
1096 #define SROMStartOffset 10 /* this is in words */
1097 #define SROMReadCount 3 /* number of words to read from SROM */
1098 #define SROMAddressBits 6
1099 #define EnetAddressOffset 20
1101 static unsigned char
1102 bmac_clock_out_bit(struct net_device *dev)
1104 unsigned short data;
1107 bmwrite(dev, SROMCSR, ChipSelect | Clk);
1110 data = bmread(dev, SROMCSR);
1112 val = (data >> SD0ShiftCount) & 1;
1114 bmwrite(dev, SROMCSR, ChipSelect);
1121 bmac_clock_in_bit(struct net_device *dev, unsigned int val)
1123 unsigned short data;
1125 if (val != 0 && val != 1) return;
1127 data = (val << SDIShiftCount);
1128 bmwrite(dev, SROMCSR, data | ChipSelect );
1131 bmwrite(dev, SROMCSR, data | ChipSelect | Clk );
1134 bmwrite(dev, SROMCSR, data | ChipSelect);
1139 reset_and_select_srom(struct net_device *dev)
1142 bmwrite(dev, SROMCSR, 0);
1145 /* send it the read command (110) */
1146 bmac_clock_in_bit(dev, 1);
1147 bmac_clock_in_bit(dev, 1);
1148 bmac_clock_in_bit(dev, 0);
1151 static unsigned short
1152 read_srom(struct net_device *dev, unsigned int addr, unsigned int addr_len)
1154 unsigned short data, val;
1157 /* send out the address we want to read from */
1158 for (i = 0; i < addr_len; i++) {
1159 val = addr >> (addr_len-i-1);
1160 bmac_clock_in_bit(dev, val & 1);
1163 /* Now read in the 16-bit data */
1165 for (i = 0; i < 16; i++) {
1166 val = bmac_clock_out_bit(dev);
1170 bmwrite(dev, SROMCSR, 0);
1176 * It looks like Cogent and SMC use different methods for calculating
1177 * checksums. What a pain..
1181 bmac_verify_checksum(struct net_device *dev)
1183 unsigned short data, storedCS;
1185 reset_and_select_srom(dev);
1186 data = read_srom(dev, 3, SROMAddressBits);
1187 storedCS = ((data >> 8) & 0x0ff) | ((data << 8) & 0xff00);
1194 bmac_get_station_address(struct net_device *dev, unsigned char *ea)
1197 unsigned short data;
1199 for (i = 0; i < 6; i++)
1201 reset_and_select_srom(dev);
1202 data = read_srom(dev, i + EnetAddressOffset/2, SROMAddressBits);
1203 ea[2*i] = bitrev8(data & 0x0ff);
1204 ea[2*i+1] = bitrev8((data >> 8) & 0x0ff);
1208 static void bmac_reset_and_enable(struct net_device *dev)
1210 struct bmac_data *bp = netdev_priv(dev);
1211 unsigned long flags;
1212 struct sk_buff *skb;
1213 unsigned char *data;
1215 spin_lock_irqsave(&bp->lock, flags);
1216 bmac_enable_and_reset_chip(dev);
1217 bmac_init_tx_ring(bp);
1218 bmac_init_rx_ring(bp);
1219 bmac_init_chip(dev);
1220 bmac_start_chip(dev);
1221 bmwrite(dev, INTDISABLE, EnableNormal);
1225 * It seems that the bmac can't receive until it's transmitted
1226 * a packet. So we give it a dummy packet to transmit.
1228 skb = dev_alloc_skb(ETHERMINPACKET);
1230 data = skb_put(skb, ETHERMINPACKET);
1231 memset(data, 0, ETHERMINPACKET);
1232 memcpy(data, dev->dev_addr, 6);
1233 memcpy(data+6, dev->dev_addr, 6);
1234 bmac_transmit_packet(skb, dev);
1236 spin_unlock_irqrestore(&bp->lock, flags);
1238 static void bmac_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1240 struct bmac_data *bp = netdev_priv(dev);
1241 strcpy(info->driver, "bmac");
1242 strcpy(info->bus_info, dev_name(&bp->mdev->ofdev.dev));
1245 static const struct ethtool_ops bmac_ethtool_ops = {
1246 .get_drvinfo = bmac_get_drvinfo,
1247 .get_link = ethtool_op_get_link,
1250 static const struct net_device_ops bmac_netdev_ops = {
1251 .ndo_open = bmac_open,
1252 .ndo_stop = bmac_close,
1253 .ndo_start_xmit = bmac_output,
1254 .ndo_set_multicast_list = bmac_set_multicast,
1255 .ndo_set_mac_address = bmac_set_address,
1256 .ndo_change_mtu = eth_change_mtu,
1257 .ndo_validate_addr = eth_validate_addr,
1260 static int __devinit bmac_probe(struct macio_dev *mdev, const struct of_device_id *match)
1263 struct bmac_data *bp;
1264 const unsigned char *prop_addr;
1265 unsigned char addr[6];
1266 struct net_device *dev;
1267 int is_bmac_plus = ((int)match->data) != 0;
1269 if (macio_resource_count(mdev) != 3 || macio_irq_count(mdev) != 3) {
1270 printk(KERN_ERR "BMAC: can't use, need 3 addrs and 3 intrs\n");
1273 prop_addr = of_get_property(macio_get_of_node(mdev),
1274 "mac-address", NULL);
1275 if (prop_addr == NULL) {
1276 prop_addr = of_get_property(macio_get_of_node(mdev),
1277 "local-mac-address", NULL);
1278 if (prop_addr == NULL) {
1279 printk(KERN_ERR "BMAC: Can't get mac-address\n");
1283 memcpy(addr, prop_addr, sizeof(addr));
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_NETDEV_DEV(dev, &mdev->ofdev.dev);
1293 macio_set_drvdata(mdev, dev);
1296 spin_lock_init(&bp->lock);
1298 if (macio_request_resources(mdev, "bmac")) {
1299 printk(KERN_ERR "BMAC: can't request IO resource !\n");
1303 dev->base_addr = (unsigned long)
1304 ioremap(macio_resource_start(mdev, 0), macio_resource_len(mdev, 0));
1305 if (dev->base_addr == 0)
1308 dev->irq = macio_irq(mdev, 0);
1310 bmac_enable_and_reset_chip(dev);
1311 bmwrite(dev, INTDISABLE, DisableAll);
1313 rev = addr[0] == 0 && addr[1] == 0xA0;
1314 for (j = 0; j < 6; ++j)
1315 dev->dev_addr[j] = rev ? bitrev8(addr[j]): addr[j];
1317 /* Enable chip without interrupts for now */
1318 bmac_enable_and_reset_chip(dev);
1319 bmwrite(dev, INTDISABLE, DisableAll);
1321 dev->netdev_ops = &bmac_netdev_ops;
1322 dev->ethtool_ops = &bmac_ethtool_ops;
1324 bmac_get_station_address(dev, addr);
1325 if (bmac_verify_checksum(dev) != 0)
1326 goto err_out_iounmap;
1328 bp->is_bmac_plus = is_bmac_plus;
1329 bp->tx_dma = ioremap(macio_resource_start(mdev, 1), macio_resource_len(mdev, 1));
1331 goto err_out_iounmap;
1332 bp->tx_dma_intr = macio_irq(mdev, 1);
1333 bp->rx_dma = ioremap(macio_resource_start(mdev, 2), macio_resource_len(mdev, 2));
1335 goto err_out_iounmap_tx;
1336 bp->rx_dma_intr = macio_irq(mdev, 2);
1338 bp->tx_cmds = (volatile struct dbdma_cmd *) DBDMA_ALIGN(bp + 1);
1339 bp->rx_cmds = bp->tx_cmds + N_TX_RING + 1;
1341 bp->queue = (struct sk_buff_head *)(bp->rx_cmds + N_RX_RING + 1);
1342 skb_queue_head_init(bp->queue);
1344 init_timer(&bp->tx_timeout);
1346 ret = request_irq(dev->irq, bmac_misc_intr, 0, "BMAC-misc", dev);
1348 printk(KERN_ERR "BMAC: can't get irq %d\n", dev->irq);
1349 goto err_out_iounmap_rx;
1351 ret = request_irq(bp->tx_dma_intr, bmac_txdma_intr, 0, "BMAC-txdma", dev);
1353 printk(KERN_ERR "BMAC: can't get irq %d\n", bp->tx_dma_intr);
1356 ret = request_irq(bp->rx_dma_intr, bmac_rxdma_intr, 0, "BMAC-rxdma", dev);
1358 printk(KERN_ERR "BMAC: can't get irq %d\n", bp->rx_dma_intr);
1362 /* Mask chip interrupts and disable chip, will be
1363 * re-enabled on open()
1365 disable_irq(dev->irq);
1366 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
1368 if (register_netdev(dev) != 0) {
1369 printk(KERN_ERR "BMAC: Ethernet registration failed\n");
1373 printk(KERN_INFO "%s: BMAC%s at %pM",
1374 dev->name, (is_bmac_plus ? "+" : ""), dev->dev_addr);
1375 XXDEBUG((", base_addr=%#0lx", dev->base_addr));
1381 free_irq(bp->rx_dma_intr, dev);
1383 free_irq(bp->tx_dma_intr, dev);
1385 free_irq(dev->irq, dev);
1387 iounmap(bp->rx_dma);
1389 iounmap(bp->tx_dma);
1391 iounmap((void __iomem *)dev->base_addr);
1393 macio_release_resources(mdev);
1395 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
1401 static int bmac_open(struct net_device *dev)
1403 struct bmac_data *bp = netdev_priv(dev);
1404 /* XXDEBUG(("bmac: enter open\n")); */
1405 /* reset the chip */
1407 bmac_reset_and_enable(dev);
1408 enable_irq(dev->irq);
1412 static int bmac_close(struct net_device *dev)
1414 struct bmac_data *bp = netdev_priv(dev);
1415 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
1416 volatile struct dbdma_regs __iomem *td = bp->tx_dma;
1417 unsigned short config;
1422 /* disable rx and tx */
1423 config = bmread(dev, RXCFG);
1424 bmwrite(dev, RXCFG, (config & ~RxMACEnable));
1426 config = bmread(dev, TXCFG);
1427 bmwrite(dev, TXCFG, (config & ~TxMACEnable));
1429 bmwrite(dev, INTDISABLE, DisableAll); /* disable all intrs */
1431 /* disable rx and tx dma */
1432 st_le32(&rd->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
1433 st_le32(&td->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
1435 /* free some skb's */
1436 XXDEBUG(("bmac: free rx bufs\n"));
1437 for (i=0; i<N_RX_RING; i++) {
1438 if (bp->rx_bufs[i] != NULL) {
1439 dev_kfree_skb(bp->rx_bufs[i]);
1440 bp->rx_bufs[i] = NULL;
1443 XXDEBUG(("bmac: free tx bufs\n"));
1444 for (i = 0; i<N_TX_RING; i++) {
1445 if (bp->tx_bufs[i] != NULL) {
1446 dev_kfree_skb(bp->tx_bufs[i]);
1447 bp->tx_bufs[i] = NULL;
1450 XXDEBUG(("bmac: all bufs freed\n"));
1453 disable_irq(dev->irq);
1454 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
1460 bmac_start(struct net_device *dev)
1462 struct bmac_data *bp = netdev_priv(dev);
1464 struct sk_buff *skb;
1465 unsigned long flags;
1470 spin_lock_irqsave(&bp->lock, flags);
1472 i = bp->tx_fill + 1;
1475 if (i == bp->tx_empty)
1477 skb = skb_dequeue(bp->queue);
1480 bmac_transmit_packet(skb, dev);
1482 spin_unlock_irqrestore(&bp->lock, flags);
1486 bmac_output(struct sk_buff *skb, struct net_device *dev)
1488 struct bmac_data *bp = netdev_priv(dev);
1489 skb_queue_tail(bp->queue, skb);
1491 return NETDEV_TX_OK;
1494 static void bmac_tx_timeout(unsigned long data)
1496 struct net_device *dev = (struct net_device *) data;
1497 struct bmac_data *bp = netdev_priv(dev);
1498 volatile struct dbdma_regs __iomem *td = bp->tx_dma;
1499 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
1500 volatile struct dbdma_cmd *cp;
1501 unsigned long flags;
1502 unsigned short config, oldConfig;
1505 XXDEBUG(("bmac: tx_timeout called\n"));
1506 spin_lock_irqsave(&bp->lock, flags);
1507 bp->timeout_active = 0;
1509 /* update various counters */
1510 /* bmac_handle_misc_intrs(bp, 0); */
1512 cp = &bp->tx_cmds[bp->tx_empty];
1513 /* XXDEBUG((KERN_DEBUG "bmac: tx dmastat=%x %x runt=%d pr=%x fs=%x fc=%x\n", */
1514 /* ld_le32(&td->status), ld_le16(&cp->xfer_status), bp->tx_bad_runt, */
1515 /* mb->pr, mb->xmtfs, mb->fifofc)); */
1517 /* turn off both tx and rx and reset the chip */
1518 config = bmread(dev, RXCFG);
1519 bmwrite(dev, RXCFG, (config & ~RxMACEnable));
1520 config = bmread(dev, TXCFG);
1521 bmwrite(dev, TXCFG, (config & ~TxMACEnable));
1522 out_le32(&td->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE|ACTIVE|DEAD));
1523 printk(KERN_ERR "bmac: transmit timeout - resetting\n");
1524 bmac_enable_and_reset_chip(dev);
1526 /* restart rx dma */
1527 cp = bus_to_virt(ld_le32(&rd->cmdptr));
1528 out_le32(&rd->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE|ACTIVE|DEAD));
1529 out_le16(&cp->xfer_status, 0);
1530 out_le32(&rd->cmdptr, virt_to_bus(cp));
1531 out_le32(&rd->control, DBDMA_SET(RUN|WAKE));
1533 /* fix up the transmit side */
1534 XXDEBUG((KERN_DEBUG "bmac: tx empty=%d fill=%d fullup=%d\n",
1535 bp->tx_empty, bp->tx_fill, bp->tx_fullup));
1537 ++dev->stats.tx_errors;
1538 if (i != bp->tx_fill) {
1539 dev_kfree_skb(bp->tx_bufs[i]);
1540 bp->tx_bufs[i] = NULL;
1541 if (++i >= N_TX_RING) i = 0;
1545 netif_wake_queue(dev);
1546 if (i != bp->tx_fill) {
1547 cp = &bp->tx_cmds[i];
1548 out_le16(&cp->xfer_status, 0);
1549 out_le16(&cp->command, OUTPUT_LAST);
1550 out_le32(&td->cmdptr, virt_to_bus(cp));
1551 out_le32(&td->control, DBDMA_SET(RUN));
1552 /* bmac_set_timeout(dev); */
1553 XXDEBUG((KERN_DEBUG "bmac: starting %d\n", i));
1556 /* turn it back on */
1557 oldConfig = bmread(dev, RXCFG);
1558 bmwrite(dev, RXCFG, oldConfig | RxMACEnable );
1559 oldConfig = bmread(dev, TXCFG);
1560 bmwrite(dev, TXCFG, oldConfig | TxMACEnable );
1562 spin_unlock_irqrestore(&bp->lock, flags);
1566 static void dump_dbdma(volatile struct dbdma_cmd *cp,int count)
1570 for (i=0;i< count;i++) {
1573 printk("dbdma req 0x%x addr 0x%x baddr 0x%x xfer/res 0x%x\n",
1585 bmac_proc_info(char *buffer, char **start, off_t offset, int length)
1592 if (bmac_devs == NULL)
1595 len += sprintf(buffer, "BMAC counters & registers\n");
1597 for (i = 0; i<N_REG_ENTRIES; i++) {
1598 len += sprintf(buffer + len, "%s: %#08x\n",
1599 reg_entries[i].name,
1600 bmread(bmac_devs, reg_entries[i].reg_offset));
1608 if (pos > offset+length) break;
1611 *start = buffer + (offset - begin);
1612 len -= (offset - begin);
1614 if (len > length) len = length;
1620 static int __devexit bmac_remove(struct macio_dev *mdev)
1622 struct net_device *dev = macio_get_drvdata(mdev);
1623 struct bmac_data *bp = netdev_priv(dev);
1625 unregister_netdev(dev);
1627 free_irq(dev->irq, dev);
1628 free_irq(bp->tx_dma_intr, dev);
1629 free_irq(bp->rx_dma_intr, dev);
1631 iounmap((void __iomem *)dev->base_addr);
1632 iounmap(bp->tx_dma);
1633 iounmap(bp->rx_dma);
1635 macio_release_resources(mdev);
1642 static struct of_device_id bmac_match[] =
1650 .compatible = "bmac+",
1655 MODULE_DEVICE_TABLE (of, bmac_match);
1657 static struct macio_driver bmac_driver =
1660 .match_table = bmac_match,
1661 .probe = bmac_probe,
1662 .remove = bmac_remove,
1664 .suspend = bmac_suspend,
1665 .resume = bmac_resume,
1670 static int __init bmac_init(void)
1672 if (bmac_emergency_rxbuf == NULL) {
1673 bmac_emergency_rxbuf = kmalloc(RX_BUFLEN, GFP_KERNEL);
1674 if (bmac_emergency_rxbuf == NULL) {
1675 printk(KERN_ERR "BMAC: can't allocate emergency RX buffer\n");
1680 return macio_register_driver(&bmac_driver);
1683 static void __exit bmac_exit(void)
1685 macio_unregister_driver(&bmac_driver);
1687 kfree(bmac_emergency_rxbuf);
1688 bmac_emergency_rxbuf = NULL;
1691 MODULE_AUTHOR("Randy Gobbel/Paul Mackerras");
1692 MODULE_DESCRIPTION("PowerMac BMAC ethernet driver.");
1693 MODULE_LICENSE("GPL");
1695 module_init(bmac_init);
1696 module_exit(bmac_exit);