2 * linux/drivers/acorn/net/ether1.c
4 * Copyright (C) 1996-2000 Russell King
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * Acorn ether1 driver (82586 chip) for Acorn machines
12 * We basically keep two queues in the cards memory - one for transmit
13 * and one for receive. Each has a head and a tail. The head is where
14 * we/the chip adds packets to be transmitted/received, and the tail
15 * is where the transmitter has got to/where the receiver will stop.
16 * Both of these queues are circular, and since the chip is running
17 * all the time, we have to be careful when we modify the pointers etc
18 * so that the buffer memory contents is valid all the time.
22 * 1.01 RMK 19/03/1996 Transfers the last odd byte onto/off of the card now.
23 * 1.02 RMK 25/05/1997 Added code to restart RU if it goes not ready
24 * 1.03 RMK 14/09/1997 Cleaned up the handling of a reset during the TX interrupt.
25 * Should prevent lockup.
26 * 1.04 RMK 17/09/1997 Added more info when initialsation of chip goes wrong.
27 * TDR now only reports failure when chip reports non-zero
29 * 1.05 RMK 31/12/1997 Removed calls to dev_tint for 2.1
30 * 1.06 RMK 10/02/2000 Updated for 2.3.43
31 * 1.07 RMK 13/05/2000 Updated for 2.3.99-pre8
34 #include <linux/module.h>
35 #include <linux/kernel.h>
36 #include <linux/types.h>
37 #include <linux/fcntl.h>
38 #include <linux/interrupt.h>
39 #include <linux/ioport.h>
41 #include <linux/slab.h>
42 #include <linux/string.h>
43 #include <linux/errno.h>
44 #include <linux/device.h>
45 #include <linux/init.h>
46 #include <linux/netdevice.h>
47 #include <linux/etherdevice.h>
48 #include <linux/skbuff.h>
49 #include <linux/bitops.h>
51 #include <asm/system.h>
54 #include <asm/ecard.h>
59 static unsigned int net_debug = NET_DEBUG;
61 #define BUFFER_SIZE 0x10000
62 #define TX_AREA_START 0x00100
63 #define TX_AREA_END 0x05000
64 #define RX_AREA_START 0x05000
65 #define RX_AREA_END 0x0fc00
67 static int ether1_open(struct net_device *dev);
68 static int ether1_sendpacket(struct sk_buff *skb, struct net_device *dev);
69 static irqreturn_t ether1_interrupt(int irq, void *dev_id);
70 static int ether1_close(struct net_device *dev);
71 static struct net_device_stats *ether1_getstats(struct net_device *dev);
72 static void ether1_setmulticastlist(struct net_device *dev);
73 static void ether1_timeout(struct net_device *dev);
75 /* ------------------------------------------------------------------------- */
77 static char version[] __devinitdata = "ether1 ethernet driver (c) 2000 Russell King v1.07\n";
82 /* ------------------------------------------------------------------------- */
87 #define ether1_readw(dev, addr, type, offset, svflgs) ether1_inw_p (dev, addr + (int)(&((type *)0)->offset), svflgs)
88 #define ether1_writew(dev, val, addr, type, offset, svflgs) ether1_outw_p (dev, val, addr + (int)(&((type *)0)->offset), svflgs)
90 static inline unsigned short
91 ether1_inw_p (struct net_device *dev, int addr, int svflgs)
97 local_irq_save (flags);
99 writeb(addr >> 12, REG_PAGE);
100 ret = readw(ETHER1_RAM + ((addr & 4095) << 1));
102 local_irq_restore (flags);
107 ether1_outw_p (struct net_device *dev, unsigned short val, int addr, int svflgs)
112 local_irq_save (flags);
114 writeb(addr >> 12, REG_PAGE);
115 writew(val, ETHER1_RAM + ((addr & 4095) << 1));
117 local_irq_restore (flags);
121 * Some inline assembler to allow fast transfers on to/off of the card.
122 * Since this driver depends on some features presented by the ARM
123 * specific architecture, and that you can't configure this driver
124 * without specifiing ARM mode, this is not a problem.
126 * This routine is essentially an optimised memcpy from the card's
127 * onboard RAM to kernel memory.
130 ether1_writebuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length)
132 unsigned int page, thislen, offset;
135 offset = start & 4095;
137 addr = ETHER1_RAM + (offset << 1);
139 if (offset + length > 4096)
140 thislen = 4096 - offset;
147 writeb(page, REG_PAGE);
150 __asm__ __volatile__(
153 1: ldr %0, [%1], #2\n\
154 mov %0, %0, lsl #16\n\
155 orr %0, %0, %0, lsr #16\n\
160 mov %0, %0, lsl #16\n\
161 orr %0, %0, %0, lsr #16\n\
166 mov %0, %0, lsl #16\n\
167 orr %0, %0, %0, lsr #16\n\
172 mov %0, %0, lsl #16\n\
173 orr %0, %0, %0, lsr #16\n\
177 2: adds %3, %3, #1\n\
180 : "=&r" (used), "=&r" (data)
181 : "r" (addr), "r" (thislen), "1" (data));
193 ether1_readbuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length)
195 unsigned int page, thislen, offset;
198 offset = start & 4095;
200 addr = ETHER1_RAM + (offset << 1);
202 if (offset + length > 4096)
203 thislen = 4096 - offset;
210 writeb(page, REG_PAGE);
213 __asm__ __volatile__(
216 1: ldr %0, [%2], #4\n\
218 mov %0, %0, lsr #8\n\
224 mov %0, %0, lsr #8\n\
230 mov %0, %0, lsr #8\n\
236 mov %0, %0, lsr #8\n\
240 2: adds %3, %3, #1\n\
243 : "=&r" (used), "=&r" (data)
244 : "r" (addr), "r" (thislen), "1" (data));
256 ether1_ramtest(struct net_device *dev, unsigned char byte)
258 unsigned char *buffer = kmalloc (BUFFER_SIZE, GFP_KERNEL);
259 int i, ret = BUFFER_SIZE;
267 memset (buffer, byte, BUFFER_SIZE);
268 ether1_writebuffer (dev, buffer, 0, BUFFER_SIZE);
269 memset (buffer, byte ^ 0xff, BUFFER_SIZE);
270 ether1_readbuffer (dev, buffer, 0, BUFFER_SIZE);
272 for (i = 0; i < BUFFER_SIZE; i++) {
273 if (buffer[i] != byte) {
274 if (max_errors >= 0 && bad != buffer[i]) {
277 printk (KERN_CRIT "%s: RAM failed with (%02X instead of %02X) at 0x%04X",
278 dev->name, buffer[i], byte, i);
286 if (bad_start == i - 1)
289 printk (" - 0x%04X\n", i - 1);
296 printk (" - 0x%04X\n", BUFFER_SIZE);
303 ether1_reset (struct net_device *dev)
305 writeb(CTRL_RST|CTRL_ACK, REG_CONTROL);
310 ether1_init_2(struct net_device *dev)
315 i = ether1_ramtest (dev, 0x5a);
318 i = ether1_ramtest (dev, 0x1e);
328 * These are the structures that are loaded into the ether RAM card to
329 * initialise the 82586
333 #define NOP_ADDR (TX_AREA_START)
334 #define NOP_SIZE (0x06)
335 static nop_t init_nop = {
342 #define TDR_ADDR (0x003a)
343 #define TDR_SIZE (0x08)
344 static tdr_t init_tdr = {
352 #define MC_ADDR (0x002e)
353 #define MC_SIZE (0x0c)
354 static mc_t init_mc = {
363 #define SA_ADDR (0x0022)
364 #define SA_SIZE (0x0c)
365 static sa_t init_sa = {
373 #define CFG_ADDR (0x0010)
374 #define CFG_SIZE (0x12)
375 static cfg_t init_cfg = {
382 CFG9_PREAMB8 | CFG9_ADDRLENBUF | CFG9_ADDRLEN(6),
386 CFG13_RETRY(15) | CFG13_SLOTH(2),
391 #define SCB_ADDR (0x0000)
392 #define SCB_SIZE (0x10)
393 static scb_t init_scb = {
395 SCB_CMDACKRNR | SCB_CMDACKCNA | SCB_CMDACKFR | SCB_CMDACKCX,
405 #define ISCP_ADDR (0xffee)
406 #define ISCP_SIZE (0x08)
407 static iscp_t init_iscp = {
415 #define SCP_ADDR (0xfff6)
416 #define SCP_SIZE (0x0a)
417 static scp_t init_scp = {
424 #define RFD_SIZE (0x16)
425 static rfd_t init_rfd = {
435 #define RBD_SIZE (0x0a)
436 static rbd_t init_rbd = {
444 #define TX_SIZE (0x08)
445 #define TBD_SIZE (0x08)
448 ether1_init_for_open (struct net_device *dev)
450 int i, status, addr, next, next2;
452 unsigned long timeout;
454 writeb(CTRL_RST|CTRL_ACK, REG_CONTROL);
456 for (i = 0; i < 6; i++)
457 init_sa.sa_addr[i] = dev->dev_addr[i];
459 /* load data structures into ether1 RAM */
460 ether1_writebuffer (dev, &init_scp, SCP_ADDR, SCP_SIZE);
461 ether1_writebuffer (dev, &init_iscp, ISCP_ADDR, ISCP_SIZE);
462 ether1_writebuffer (dev, &init_scb, SCB_ADDR, SCB_SIZE);
463 ether1_writebuffer (dev, &init_cfg, CFG_ADDR, CFG_SIZE);
464 ether1_writebuffer (dev, &init_sa, SA_ADDR, SA_SIZE);
465 ether1_writebuffer (dev, &init_mc, MC_ADDR, MC_SIZE);
466 ether1_writebuffer (dev, &init_tdr, TDR_ADDR, TDR_SIZE);
467 ether1_writebuffer (dev, &init_nop, NOP_ADDR, NOP_SIZE);
469 if (ether1_readw(dev, CFG_ADDR, cfg_t, cfg_command, NORMALIRQS) != CMD_CONFIG) {
470 printk (KERN_ERR "%s: detected either RAM fault or compiler bug\n",
476 * setup circularly linked list of { rfd, rbd, buffer }, with
477 * all rfds circularly linked, rbds circularly linked.
478 * First rfd is linked to scp, first rbd is linked to first
479 * rfd. Last rbd has a suspend command.
481 addr = RX_AREA_START;
483 next = addr + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10;
484 next2 = next + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10;
486 if (next2 >= RX_AREA_END) {
487 next = RX_AREA_START;
488 init_rfd.rfd_command = RFD_CMDEL | RFD_CMDSUSPEND;
489 priv(dev)->rx_tail = addr;
491 init_rfd.rfd_command = 0;
492 if (addr == RX_AREA_START)
493 init_rfd.rfd_rbdoffset = addr + RFD_SIZE;
495 init_rfd.rfd_rbdoffset = 0;
496 init_rfd.rfd_link = next;
497 init_rbd.rbd_link = next + RFD_SIZE;
498 init_rbd.rbd_bufl = addr + RFD_SIZE + RBD_SIZE;
500 ether1_writebuffer (dev, &init_rfd, addr, RFD_SIZE);
501 ether1_writebuffer (dev, &init_rbd, addr + RFD_SIZE, RBD_SIZE);
503 } while (next2 < RX_AREA_END);
505 priv(dev)->tx_link = NOP_ADDR;
506 priv(dev)->tx_head = NOP_ADDR + NOP_SIZE;
507 priv(dev)->tx_tail = TDR_ADDR;
508 priv(dev)->rx_head = RX_AREA_START;
510 /* release reset & give 586 a prod */
511 priv(dev)->resetting = 1;
512 priv(dev)->initialising = 1;
513 writeb(CTRL_RST, REG_CONTROL);
514 writeb(0, REG_CONTROL);
515 writeb(CTRL_CA, REG_CONTROL);
517 /* 586 should now unset iscp.busy */
518 timeout = jiffies + HZ/2;
519 while (ether1_readw(dev, ISCP_ADDR, iscp_t, iscp_busy, DISABLEIRQS) == 1) {
520 if (time_after(jiffies, timeout)) {
521 printk (KERN_WARNING "%s: can't initialise 82586: iscp is busy\n", dev->name);
526 /* check status of commands that we issued */
528 while (((status = ether1_readw(dev, CFG_ADDR, cfg_t, cfg_status, DISABLEIRQS))
529 & STAT_COMPLETE) == 0) {
530 if (time_after(jiffies, timeout))
534 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
535 printk (KERN_WARNING "%s: can't initialise 82586: config status %04X\n", dev->name, status);
536 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
537 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
538 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
539 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
540 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
545 while (((status = ether1_readw(dev, SA_ADDR, sa_t, sa_status, DISABLEIRQS))
546 & STAT_COMPLETE) == 0) {
547 if (time_after(jiffies, timeout))
551 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
552 printk (KERN_WARNING "%s: can't initialise 82586: set address status %04X\n", dev->name, status);
553 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
554 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
555 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
556 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
557 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
562 while (((status = ether1_readw(dev, MC_ADDR, mc_t, mc_status, DISABLEIRQS))
563 & STAT_COMPLETE) == 0) {
564 if (time_after(jiffies, timeout))
568 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
569 printk (KERN_WARNING "%s: can't initialise 82586: set multicast status %04X\n", dev->name, status);
570 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
571 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
572 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
573 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
574 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
579 while (((status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_status, DISABLEIRQS))
580 & STAT_COMPLETE) == 0) {
581 if (time_after(jiffies, timeout))
585 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
586 printk (KERN_WARNING "%s: can't tdr (ignored)\n", dev->name);
587 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
588 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
589 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
590 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
591 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
593 status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_result, DISABLEIRQS);
594 if (status & TDR_XCVRPROB)
595 printk (KERN_WARNING "%s: i/f failed tdr: transceiver problem\n", dev->name);
596 else if ((status & (TDR_SHORT|TDR_OPEN)) && (status & TDR_TIME)) {
598 printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d.%d us away\n", dev->name,
599 status & TDR_SHORT ? "short" : "open", (status & TDR_TIME) / 10,
600 (status & TDR_TIME) % 10);
602 printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d clks away\n", dev->name,
603 status & TDR_SHORT ? "short" : "open", (status & TDR_TIME));
610 return failures ? 1 : 0;
613 /* ------------------------------------------------------------------------- */
616 ether1_txalloc (struct net_device *dev, int size)
620 size = (size + 1) & ~1;
621 tail = priv(dev)->tx_tail;
623 if (priv(dev)->tx_head + size > TX_AREA_END) {
624 if (tail > priv(dev)->tx_head)
626 start = TX_AREA_START;
627 if (start + size > tail)
629 priv(dev)->tx_head = start + size;
631 if (priv(dev)->tx_head < tail && (priv(dev)->tx_head + size) > tail)
633 start = priv(dev)->tx_head;
634 priv(dev)->tx_head += size;
641 ether1_open (struct net_device *dev)
643 if (!is_valid_ether_addr(dev->dev_addr)) {
644 printk(KERN_WARNING "%s: invalid ethernet MAC address\n",
649 if (request_irq(dev->irq, ether1_interrupt, 0, "ether1", dev))
652 memset (&priv(dev)->stats, 0, sizeof (struct net_device_stats));
654 if (ether1_init_for_open (dev)) {
655 free_irq (dev->irq, dev);
659 netif_start_queue(dev);
665 ether1_timeout(struct net_device *dev)
667 printk(KERN_WARNING "%s: transmit timeout, network cable problem?\n",
669 printk(KERN_WARNING "%s: resetting device\n", dev->name);
673 if (ether1_init_for_open (dev))
674 printk (KERN_ERR "%s: unable to restart interface\n", dev->name);
676 priv(dev)->stats.tx_errors++;
677 netif_wake_queue(dev);
681 ether1_sendpacket (struct sk_buff *skb, struct net_device *dev)
683 int tmp, tst, nopaddr, txaddr, tbdaddr, dataddr;
689 if (priv(dev)->restart) {
690 printk(KERN_WARNING "%s: resetting device\n", dev->name);
694 if (ether1_init_for_open(dev))
695 printk(KERN_ERR "%s: unable to restart interface\n", dev->name);
697 priv(dev)->restart = 0;
700 if (skb->len < ETH_ZLEN) {
701 if (skb_padto(skb, ETH_ZLEN))
706 * insert packet followed by a nop
708 txaddr = ether1_txalloc (dev, TX_SIZE);
709 tbdaddr = ether1_txalloc (dev, TBD_SIZE);
710 dataddr = ether1_txalloc (dev, skb->len);
711 nopaddr = ether1_txalloc (dev, NOP_SIZE);
714 tx.tx_command = CMD_TX | CMD_INTR;
715 tx.tx_link = nopaddr;
716 tx.tx_tbdoffset = tbdaddr;
717 tbd.tbd_opts = TBD_EOL | skb->len;
718 tbd.tbd_link = I82586_NULL;
719 tbd.tbd_bufl = dataddr;
722 nop.nop_command = CMD_NOP;
723 nop.nop_link = nopaddr;
725 local_irq_save(flags);
726 ether1_writebuffer (dev, &tx, txaddr, TX_SIZE);
727 ether1_writebuffer (dev, &tbd, tbdaddr, TBD_SIZE);
728 ether1_writebuffer (dev, skb->data, dataddr, skb->len);
729 ether1_writebuffer (dev, &nop, nopaddr, NOP_SIZE);
730 tmp = priv(dev)->tx_link;
731 priv(dev)->tx_link = nopaddr;
733 /* now reset the previous nop pointer */
734 ether1_writew(dev, txaddr, tmp, nop_t, nop_link, NORMALIRQS);
736 local_irq_restore(flags);
738 /* handle transmit */
739 dev->trans_start = jiffies;
741 /* check to see if we have room for a full sized ether frame */
742 tmp = priv(dev)->tx_head;
743 tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN);
744 priv(dev)->tx_head = tmp;
748 netif_stop_queue(dev);
755 ether1_xmit_done (struct net_device *dev)
760 caddr = priv(dev)->tx_tail;
763 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE);
765 switch (nop.nop_command & CMD_MASK) {
768 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS)
769 != (unsigned short)I82586_NULL) {
770 ether1_writew(dev, SCB_CMDCUCSTART | SCB_CMDRXSTART, SCB_ADDR, scb_t,
771 scb_command, NORMALIRQS);
772 writeb(CTRL_CA, REG_CONTROL);
774 priv(dev)->tx_tail = NOP_ADDR;
778 if (nop.nop_link == caddr) {
779 if (priv(dev)->initialising == 0)
780 printk (KERN_WARNING "%s: strange command complete with no tx command!\n", dev->name);
782 priv(dev)->initialising = 0;
785 if (caddr == nop.nop_link)
787 caddr = nop.nop_link;
791 if (nop.nop_status & STAT_COMPLETE)
793 printk (KERN_ERR "%s: strange command complete without completed command\n", dev->name);
794 priv(dev)->restart = 1;
798 printk (KERN_WARNING "%s: strange command %d complete! (offset %04X)", dev->name,
799 nop.nop_command & CMD_MASK, caddr);
800 priv(dev)->restart = 1;
804 while (nop.nop_status & STAT_COMPLETE) {
805 if (nop.nop_status & STAT_OK) {
806 priv(dev)->stats.tx_packets ++;
807 priv(dev)->stats.collisions += (nop.nop_status & STAT_COLLISIONS);
809 priv(dev)->stats.tx_errors ++;
811 if (nop.nop_status & STAT_COLLAFTERTX)
812 priv(dev)->stats.collisions ++;
813 if (nop.nop_status & STAT_NOCARRIER)
814 priv(dev)->stats.tx_carrier_errors ++;
815 if (nop.nop_status & STAT_TXLOSTCTS)
816 printk (KERN_WARNING "%s: cts lost\n", dev->name);
817 if (nop.nop_status & STAT_TXSLOWDMA)
818 priv(dev)->stats.tx_fifo_errors ++;
819 if (nop.nop_status & STAT_COLLEXCESSIVE)
820 priv(dev)->stats.collisions += 16;
823 if (nop.nop_link == caddr) {
824 printk (KERN_ERR "%s: tx buffer chaining error: tx command points to itself\n", dev->name);
828 caddr = nop.nop_link;
829 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE);
830 if ((nop.nop_command & CMD_MASK) != CMD_NOP) {
831 printk (KERN_ERR "%s: tx buffer chaining error: no nop after tx command\n", dev->name);
835 if (caddr == nop.nop_link)
838 caddr = nop.nop_link;
839 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE);
840 if ((nop.nop_command & CMD_MASK) != CMD_TX) {
841 printk (KERN_ERR "%s: tx buffer chaining error: no tx command after nop\n", dev->name);
845 priv(dev)->tx_tail = caddr;
847 caddr = priv(dev)->tx_head;
848 tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN);
849 priv(dev)->tx_head = caddr;
851 netif_wake_queue(dev);
855 ether1_recv_done (struct net_device *dev)
858 int nexttail, rbdaddr;
862 status = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_status, NORMALIRQS);
863 if ((status & RFD_COMPLETE) == 0)
866 rbdaddr = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_rbdoffset, NORMALIRQS);
867 ether1_readbuffer (dev, &rbd, rbdaddr, RBD_SIZE);
869 if ((rbd.rbd_status & (RBD_EOF | RBD_ACNTVALID)) == (RBD_EOF | RBD_ACNTVALID)) {
870 int length = rbd.rbd_status & RBD_ACNT;
873 length = (length + 1) & ~1;
874 skb = dev_alloc_skb (length + 2);
877 skb_reserve (skb, 2);
879 ether1_readbuffer (dev, skb_put (skb, length), rbd.rbd_bufl, length);
881 skb->protocol = eth_type_trans (skb, dev);
883 priv(dev)->stats.rx_packets ++;
885 priv(dev)->stats.rx_dropped ++;
887 printk(KERN_WARNING "%s: %s\n", dev->name,
888 (rbd.rbd_status & RBD_EOF) ? "oversized packet" : "acnt not valid");
889 priv(dev)->stats.rx_dropped ++;
892 nexttail = ether1_readw(dev, priv(dev)->rx_tail, rfd_t, rfd_link, NORMALIRQS);
893 /* nexttail should be rx_head */
894 if (nexttail != priv(dev)->rx_head)
895 printk(KERN_ERR "%s: receiver buffer chaining error (%04X != %04X)\n",
896 dev->name, nexttail, priv(dev)->rx_head);
897 ether1_writew(dev, RFD_CMDEL | RFD_CMDSUSPEND, nexttail, rfd_t, rfd_command, NORMALIRQS);
898 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_command, NORMALIRQS);
899 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_status, NORMALIRQS);
900 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_rbdoffset, NORMALIRQS);
902 priv(dev)->rx_tail = nexttail;
903 priv(dev)->rx_head = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_link, NORMALIRQS);
908 ether1_interrupt (int irq, void *dev_id)
910 struct net_device *dev = (struct net_device *)dev_id;
913 status = ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS);
916 ether1_writew(dev, status & (SCB_STRNR | SCB_STCNA | SCB_STFR | SCB_STCX),
917 SCB_ADDR, scb_t, scb_command, NORMALIRQS);
918 writeb(CTRL_CA | CTRL_ACK, REG_CONTROL);
919 if (status & SCB_STCX) {
920 ether1_xmit_done (dev);
922 if (status & SCB_STCNA) {
923 if (priv(dev)->resetting == 0)
924 printk (KERN_WARNING "%s: CU went not ready ???\n", dev->name);
926 priv(dev)->resetting += 1;
927 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS)
928 != (unsigned short)I82586_NULL) {
929 ether1_writew(dev, SCB_CMDCUCSTART, SCB_ADDR, scb_t, scb_command, NORMALIRQS);
930 writeb(CTRL_CA, REG_CONTROL);
932 if (priv(dev)->resetting == 2)
933 priv(dev)->resetting = 0;
935 if (status & SCB_STFR) {
936 ether1_recv_done (dev);
938 if (status & SCB_STRNR) {
939 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS) & SCB_STRXSUSP) {
940 printk (KERN_WARNING "%s: RU went not ready: RU suspended\n", dev->name);
941 ether1_writew(dev, SCB_CMDRXRESUME, SCB_ADDR, scb_t, scb_command, NORMALIRQS);
942 writeb(CTRL_CA, REG_CONTROL);
943 priv(dev)->stats.rx_dropped ++; /* we suspended due to lack of buffer space */
945 printk(KERN_WARNING "%s: RU went not ready: %04X\n", dev->name,
946 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS));
947 printk (KERN_WARNING "RU ptr = %04X\n", ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset,
951 writeb(CTRL_ACK, REG_CONTROL);
957 ether1_close (struct net_device *dev)
961 free_irq(dev->irq, dev);
966 static struct net_device_stats *
967 ether1_getstats (struct net_device *dev)
969 return &priv(dev)->stats;
973 * Set or clear the multicast filter for this adaptor.
974 * num_addrs == -1 Promiscuous mode, receive all packets.
975 * num_addrs == 0 Normal mode, clear multicast list.
976 * num_addrs > 0 Multicast mode, receive normal and MC packets, and do
977 * best-effort filtering.
980 ether1_setmulticastlist (struct net_device *dev)
984 /* ------------------------------------------------------------------------- */
986 static void __devinit ether1_banner(void)
988 static unsigned int version_printed = 0;
990 if (net_debug && version_printed++ == 0)
991 printk(KERN_INFO "%s", version);
994 static const struct net_device_ops ether1_netdev_ops = {
995 .ndo_open = ether1_open,
996 .ndo_stop = ether1_close,
997 .ndo_start_xmit = ether1_sendpacket,
998 .ndo_get_stats = ether1_getstats,
999 .ndo_set_multicast_list = ether1_setmulticastlist,
1000 .ndo_tx_timeout = ether1_timeout,
1001 .ndo_validate_addr = eth_validate_addr,
1002 .ndo_change_mtu = eth_change_mtu,
1003 .ndo_set_mac_address = eth_mac_addr,
1006 static int __devinit
1007 ether1_probe(struct expansion_card *ec, const struct ecard_id *id)
1009 struct net_device *dev;
1014 ret = ecard_request_resources(ec);
1018 dev = alloc_etherdev(sizeof(struct ether1_priv));
1024 SET_NETDEV_DEV(dev, &ec->dev);
1027 priv(dev)->base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
1028 if (!priv(dev)->base) {
1033 if ((priv(dev)->bus_type = ether1_reset(dev)) == 0) {
1038 for (i = 0; i < 6; i++)
1039 dev->dev_addr[i] = readb(IDPROM_ADDRESS + (i << 2));
1041 if (ether1_init_2(dev)) {
1046 dev->netdev_ops = ðer1_netdev_ops;
1047 dev->watchdog_timeo = 5 * HZ / 100;
1049 ret = register_netdev(dev);
1053 printk(KERN_INFO "%s: ether1 in slot %d, %pM\n",
1054 dev->name, ec->slot_no, dev->dev_addr);
1056 ecard_set_drvdata(ec, dev);
1062 ecard_release_resources(ec);
1067 static void __devexit ether1_remove(struct expansion_card *ec)
1069 struct net_device *dev = ecard_get_drvdata(ec);
1071 ecard_set_drvdata(ec, NULL);
1073 unregister_netdev(dev);
1075 ecard_release_resources(ec);
1078 static const struct ecard_id ether1_ids[] = {
1079 { MANU_ACORN, PROD_ACORN_ETHER1 },
1083 static struct ecard_driver ether1_driver = {
1084 .probe = ether1_probe,
1085 .remove = __devexit_p(ether1_remove),
1086 .id_table = ether1_ids,
1092 static int __init ether1_init(void)
1094 return ecard_register_driver(ðer1_driver);
1097 static void __exit ether1_exit(void)
1099 ecard_remove_driver(ðer1_driver);
1102 module_init(ether1_init);
1103 module_exit(ether1_exit);
1105 MODULE_LICENSE("GPL");