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/sched.h>
37 #include <linux/types.h>
38 #include <linux/fcntl.h>
39 #include <linux/interrupt.h>
40 #include <linux/ptrace.h>
41 #include <linux/ioport.h>
43 #include <linux/slab.h>
44 #include <linux/string.h>
45 #include <linux/errno.h>
46 #include <linux/device.h>
47 #include <linux/init.h>
48 #include <linux/netdevice.h>
49 #include <linux/etherdevice.h>
50 #include <linux/skbuff.h>
51 #include <linux/bitops.h>
53 #include <asm/system.h>
56 #include <asm/ecard.h>
61 static unsigned int net_debug = NET_DEBUG;
63 #define BUFFER_SIZE 0x10000
64 #define TX_AREA_START 0x00100
65 #define TX_AREA_END 0x05000
66 #define RX_AREA_START 0x05000
67 #define RX_AREA_END 0x0fc00
69 static int ether1_open(struct net_device *dev);
70 static int ether1_sendpacket(struct sk_buff *skb, struct net_device *dev);
71 static irqreturn_t ether1_interrupt(int irq, void *dev_id, struct pt_regs *regs);
72 static int ether1_close(struct net_device *dev);
73 static struct net_device_stats *ether1_getstats(struct net_device *dev);
74 static void ether1_setmulticastlist(struct net_device *dev);
75 static void ether1_timeout(struct net_device *dev);
77 /* ------------------------------------------------------------------------- */
79 static char version[] __initdata = "ether1 ethernet driver (c) 2000 Russell King v1.07\n";
84 /* ------------------------------------------------------------------------- */
89 #define ether1_readw(dev, addr, type, offset, svflgs) ether1_inw_p (dev, addr + (int)(&((type *)0)->offset), svflgs)
90 #define ether1_writew(dev, val, addr, type, offset, svflgs) ether1_outw_p (dev, val, addr + (int)(&((type *)0)->offset), svflgs)
92 static inline unsigned short
93 ether1_inw_p (struct net_device *dev, int addr, int svflgs)
99 local_irq_save (flags);
101 writeb(addr >> 12, REG_PAGE);
102 ret = readw(ETHER1_RAM + ((addr & 4095) << 1));
104 local_irq_restore (flags);
109 ether1_outw_p (struct net_device *dev, unsigned short val, int addr, int svflgs)
114 local_irq_save (flags);
116 writeb(addr >> 12, REG_PAGE);
117 writew(val, ETHER1_RAM + ((addr & 4095) << 1));
119 local_irq_restore (flags);
123 * Some inline assembler to allow fast transfers on to/off of the card.
124 * Since this driver depends on some features presented by the ARM
125 * specific architecture, and that you can't configure this driver
126 * without specifiing ARM mode, this is not a problem.
128 * This routine is essentially an optimised memcpy from the card's
129 * onboard RAM to kernel memory.
132 ether1_writebuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length)
134 unsigned int page, thislen, offset;
137 offset = start & 4095;
139 addr = ETHER1_RAM + (offset << 1);
141 if (offset + length > 4096)
142 thislen = 4096 - offset;
149 writeb(page, REG_PAGE);
152 __asm__ __volatile__(
155 1: ldr %0, [%1], #2\n\
156 mov %0, %0, lsl #16\n\
157 orr %0, %0, %0, lsr #16\n\
162 mov %0, %0, lsl #16\n\
163 orr %0, %0, %0, lsr #16\n\
168 mov %0, %0, lsl #16\n\
169 orr %0, %0, %0, lsr #16\n\
174 mov %0, %0, lsl #16\n\
175 orr %0, %0, %0, lsr #16\n\
179 2: adds %3, %3, #1\n\
182 : "=&r" (used), "=&r" (data)
183 : "r" (addr), "r" (thislen), "1" (data));
195 ether1_readbuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length)
197 unsigned int page, thislen, offset;
200 offset = start & 4095;
202 addr = ETHER1_RAM + (offset << 1);
204 if (offset + length > 4096)
205 thislen = 4096 - offset;
212 writeb(page, REG_PAGE);
215 __asm__ __volatile__(
218 1: ldr %0, [%2], #4\n\
220 mov %0, %0, lsr #8\n\
226 mov %0, %0, lsr #8\n\
232 mov %0, %0, lsr #8\n\
238 mov %0, %0, lsr #8\n\
242 2: adds %3, %3, #1\n\
245 : "=&r" (used), "=&r" (data)
246 : "r" (addr), "r" (thislen), "1" (data));
258 ether1_ramtest(struct net_device *dev, unsigned char byte)
260 unsigned char *buffer = kmalloc (BUFFER_SIZE, GFP_KERNEL);
261 int i, ret = BUFFER_SIZE;
269 memset (buffer, byte, BUFFER_SIZE);
270 ether1_writebuffer (dev, buffer, 0, BUFFER_SIZE);
271 memset (buffer, byte ^ 0xff, BUFFER_SIZE);
272 ether1_readbuffer (dev, buffer, 0, BUFFER_SIZE);
274 for (i = 0; i < BUFFER_SIZE; i++) {
275 if (buffer[i] != byte) {
276 if (max_errors >= 0 && bad != buffer[i]) {
279 printk (KERN_CRIT "%s: RAM failed with (%02X instead of %02X) at 0x%04X",
280 dev->name, buffer[i], byte, i);
288 if (bad_start == i - 1)
291 printk (" - 0x%04X\n", i - 1);
298 printk (" - 0x%04X\n", BUFFER_SIZE);
305 ether1_reset (struct net_device *dev)
307 writeb(CTRL_RST|CTRL_ACK, REG_CONTROL);
312 ether1_init_2(struct net_device *dev)
317 i = ether1_ramtest (dev, 0x5a);
320 i = ether1_ramtest (dev, 0x1e);
330 * These are the structures that are loaded into the ether RAM card to
331 * initialise the 82586
335 #define NOP_ADDR (TX_AREA_START)
336 #define NOP_SIZE (0x06)
337 static nop_t init_nop = {
344 #define TDR_ADDR (0x003a)
345 #define TDR_SIZE (0x08)
346 static tdr_t init_tdr = {
354 #define MC_ADDR (0x002e)
355 #define MC_SIZE (0x0c)
356 static mc_t init_mc = {
365 #define SA_ADDR (0x0022)
366 #define SA_SIZE (0x0c)
367 static sa_t init_sa = {
375 #define CFG_ADDR (0x0010)
376 #define CFG_SIZE (0x12)
377 static cfg_t init_cfg = {
384 CFG9_PREAMB8 | CFG9_ADDRLENBUF | CFG9_ADDRLEN(6),
388 CFG13_RETRY(15) | CFG13_SLOTH(2),
393 #define SCB_ADDR (0x0000)
394 #define SCB_SIZE (0x10)
395 static scb_t init_scb = {
397 SCB_CMDACKRNR | SCB_CMDACKCNA | SCB_CMDACKFR | SCB_CMDACKCX,
407 #define ISCP_ADDR (0xffee)
408 #define ISCP_SIZE (0x08)
409 static iscp_t init_iscp = {
417 #define SCP_ADDR (0xfff6)
418 #define SCP_SIZE (0x0a)
419 static scp_t init_scp = {
426 #define RFD_SIZE (0x16)
427 static rfd_t init_rfd = {
437 #define RBD_SIZE (0x0a)
438 static rbd_t init_rbd = {
446 #define TX_SIZE (0x08)
447 #define TBD_SIZE (0x08)
450 ether1_init_for_open (struct net_device *dev)
452 int i, status, addr, next, next2;
454 unsigned long timeout;
456 writeb(CTRL_RST|CTRL_ACK, REG_CONTROL);
458 for (i = 0; i < 6; i++)
459 init_sa.sa_addr[i] = dev->dev_addr[i];
461 /* load data structures into ether1 RAM */
462 ether1_writebuffer (dev, &init_scp, SCP_ADDR, SCP_SIZE);
463 ether1_writebuffer (dev, &init_iscp, ISCP_ADDR, ISCP_SIZE);
464 ether1_writebuffer (dev, &init_scb, SCB_ADDR, SCB_SIZE);
465 ether1_writebuffer (dev, &init_cfg, CFG_ADDR, CFG_SIZE);
466 ether1_writebuffer (dev, &init_sa, SA_ADDR, SA_SIZE);
467 ether1_writebuffer (dev, &init_mc, MC_ADDR, MC_SIZE);
468 ether1_writebuffer (dev, &init_tdr, TDR_ADDR, TDR_SIZE);
469 ether1_writebuffer (dev, &init_nop, NOP_ADDR, NOP_SIZE);
471 if (ether1_readw(dev, CFG_ADDR, cfg_t, cfg_command, NORMALIRQS) != CMD_CONFIG) {
472 printk (KERN_ERR "%s: detected either RAM fault or compiler bug\n",
478 * setup circularly linked list of { rfd, rbd, buffer }, with
479 * all rfds circularly linked, rbds circularly linked.
480 * First rfd is linked to scp, first rbd is linked to first
481 * rfd. Last rbd has a suspend command.
483 addr = RX_AREA_START;
485 next = addr + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10;
486 next2 = next + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10;
488 if (next2 >= RX_AREA_END) {
489 next = RX_AREA_START;
490 init_rfd.rfd_command = RFD_CMDEL | RFD_CMDSUSPEND;
491 priv(dev)->rx_tail = addr;
493 init_rfd.rfd_command = 0;
494 if (addr == RX_AREA_START)
495 init_rfd.rfd_rbdoffset = addr + RFD_SIZE;
497 init_rfd.rfd_rbdoffset = 0;
498 init_rfd.rfd_link = next;
499 init_rbd.rbd_link = next + RFD_SIZE;
500 init_rbd.rbd_bufl = addr + RFD_SIZE + RBD_SIZE;
502 ether1_writebuffer (dev, &init_rfd, addr, RFD_SIZE);
503 ether1_writebuffer (dev, &init_rbd, addr + RFD_SIZE, RBD_SIZE);
505 } while (next2 < RX_AREA_END);
507 priv(dev)->tx_link = NOP_ADDR;
508 priv(dev)->tx_head = NOP_ADDR + NOP_SIZE;
509 priv(dev)->tx_tail = TDR_ADDR;
510 priv(dev)->rx_head = RX_AREA_START;
512 /* release reset & give 586 a prod */
513 priv(dev)->resetting = 1;
514 priv(dev)->initialising = 1;
515 writeb(CTRL_RST, REG_CONTROL);
516 writeb(0, REG_CONTROL);
517 writeb(CTRL_CA, REG_CONTROL);
519 /* 586 should now unset iscp.busy */
520 timeout = jiffies + HZ/2;
521 while (ether1_readw(dev, ISCP_ADDR, iscp_t, iscp_busy, DISABLEIRQS) == 1) {
522 if (time_after(jiffies, timeout)) {
523 printk (KERN_WARNING "%s: can't initialise 82586: iscp is busy\n", dev->name);
528 /* check status of commands that we issued */
530 while (((status = ether1_readw(dev, CFG_ADDR, cfg_t, cfg_status, DISABLEIRQS))
531 & STAT_COMPLETE) == 0) {
532 if (time_after(jiffies, timeout))
536 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
537 printk (KERN_WARNING "%s: can't initialise 82586: config status %04X\n", dev->name, status);
538 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
539 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
540 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
541 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
542 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
547 while (((status = ether1_readw(dev, SA_ADDR, sa_t, sa_status, DISABLEIRQS))
548 & STAT_COMPLETE) == 0) {
549 if (time_after(jiffies, timeout))
553 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
554 printk (KERN_WARNING "%s: can't initialise 82586: set address status %04X\n", dev->name, status);
555 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
556 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
557 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
558 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
559 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
564 while (((status = ether1_readw(dev, MC_ADDR, mc_t, mc_status, DISABLEIRQS))
565 & STAT_COMPLETE) == 0) {
566 if (time_after(jiffies, timeout))
570 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
571 printk (KERN_WARNING "%s: can't initialise 82586: set multicast status %04X\n", dev->name, status);
572 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
573 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
574 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
575 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
576 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
581 while (((status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_status, DISABLEIRQS))
582 & STAT_COMPLETE) == 0) {
583 if (time_after(jiffies, timeout))
587 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
588 printk (KERN_WARNING "%s: can't tdr (ignored)\n", dev->name);
589 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
590 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
591 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
592 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
593 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
595 status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_result, DISABLEIRQS);
596 if (status & TDR_XCVRPROB)
597 printk (KERN_WARNING "%s: i/f failed tdr: transceiver problem\n", dev->name);
598 else if ((status & (TDR_SHORT|TDR_OPEN)) && (status & TDR_TIME)) {
600 printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d.%d us away\n", dev->name,
601 status & TDR_SHORT ? "short" : "open", (status & TDR_TIME) / 10,
602 (status & TDR_TIME) % 10);
604 printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d clks away\n", dev->name,
605 status & TDR_SHORT ? "short" : "open", (status & TDR_TIME));
612 return failures ? 1 : 0;
615 /* ------------------------------------------------------------------------- */
618 ether1_txalloc (struct net_device *dev, int size)
622 size = (size + 1) & ~1;
623 tail = priv(dev)->tx_tail;
625 if (priv(dev)->tx_head + size > TX_AREA_END) {
626 if (tail > priv(dev)->tx_head)
628 start = TX_AREA_START;
629 if (start + size > tail)
631 priv(dev)->tx_head = start + size;
633 if (priv(dev)->tx_head < tail && (priv(dev)->tx_head + size) > tail)
635 start = priv(dev)->tx_head;
636 priv(dev)->tx_head += size;
643 ether1_open (struct net_device *dev)
645 if (!is_valid_ether_addr(dev->dev_addr)) {
646 printk(KERN_WARNING "%s: invalid ethernet MAC address\n",
651 if (request_irq(dev->irq, ether1_interrupt, 0, "ether1", dev))
654 memset (&priv(dev)->stats, 0, sizeof (struct net_device_stats));
656 if (ether1_init_for_open (dev)) {
657 free_irq (dev->irq, dev);
661 netif_start_queue(dev);
667 ether1_timeout(struct net_device *dev)
669 printk(KERN_WARNING "%s: transmit timeout, network cable problem?\n",
671 printk(KERN_WARNING "%s: resetting device\n", dev->name);
675 if (ether1_init_for_open (dev))
676 printk (KERN_ERR "%s: unable to restart interface\n", dev->name);
678 priv(dev)->stats.tx_errors++;
679 netif_wake_queue(dev);
683 ether1_sendpacket (struct sk_buff *skb, struct net_device *dev)
685 int tmp, tst, nopaddr, txaddr, tbdaddr, dataddr;
691 if (priv(dev)->restart) {
692 printk(KERN_WARNING "%s: resetting device\n", dev->name);
696 if (ether1_init_for_open(dev))
697 printk(KERN_ERR "%s: unable to restart interface\n", dev->name);
699 priv(dev)->restart = 0;
702 if (skb->len < ETH_ZLEN) {
703 skb = skb_padto(skb, ETH_ZLEN);
709 * insert packet followed by a nop
711 txaddr = ether1_txalloc (dev, TX_SIZE);
712 tbdaddr = ether1_txalloc (dev, TBD_SIZE);
713 dataddr = ether1_txalloc (dev, skb->len);
714 nopaddr = ether1_txalloc (dev, NOP_SIZE);
717 tx.tx_command = CMD_TX | CMD_INTR;
718 tx.tx_link = nopaddr;
719 tx.tx_tbdoffset = tbdaddr;
720 tbd.tbd_opts = TBD_EOL | skb->len;
721 tbd.tbd_link = I82586_NULL;
722 tbd.tbd_bufl = dataddr;
725 nop.nop_command = CMD_NOP;
726 nop.nop_link = nopaddr;
728 local_irq_save(flags);
729 ether1_writebuffer (dev, &tx, txaddr, TX_SIZE);
730 ether1_writebuffer (dev, &tbd, tbdaddr, TBD_SIZE);
731 ether1_writebuffer (dev, skb->data, dataddr, skb->len);
732 ether1_writebuffer (dev, &nop, nopaddr, NOP_SIZE);
733 tmp = priv(dev)->tx_link;
734 priv(dev)->tx_link = nopaddr;
736 /* now reset the previous nop pointer */
737 ether1_writew(dev, txaddr, tmp, nop_t, nop_link, NORMALIRQS);
739 local_irq_restore(flags);
741 /* handle transmit */
742 dev->trans_start = jiffies;
744 /* check to see if we have room for a full sized ether frame */
745 tmp = priv(dev)->tx_head;
746 tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN);
747 priv(dev)->tx_head = tmp;
751 netif_stop_queue(dev);
758 ether1_xmit_done (struct net_device *dev)
763 caddr = priv(dev)->tx_tail;
766 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE);
768 switch (nop.nop_command & CMD_MASK) {
771 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS)
772 != (unsigned short)I82586_NULL) {
773 ether1_writew(dev, SCB_CMDCUCSTART | SCB_CMDRXSTART, SCB_ADDR, scb_t,
774 scb_command, NORMALIRQS);
775 writeb(CTRL_CA, REG_CONTROL);
777 priv(dev)->tx_tail = NOP_ADDR;
781 if (nop.nop_link == caddr) {
782 if (priv(dev)->initialising == 0)
783 printk (KERN_WARNING "%s: strange command complete with no tx command!\n", dev->name);
785 priv(dev)->initialising = 0;
788 if (caddr == nop.nop_link)
790 caddr = nop.nop_link;
794 if (nop.nop_status & STAT_COMPLETE)
796 printk (KERN_ERR "%s: strange command complete without completed command\n", dev->name);
797 priv(dev)->restart = 1;
801 printk (KERN_WARNING "%s: strange command %d complete! (offset %04X)", dev->name,
802 nop.nop_command & CMD_MASK, caddr);
803 priv(dev)->restart = 1;
807 while (nop.nop_status & STAT_COMPLETE) {
808 if (nop.nop_status & STAT_OK) {
809 priv(dev)->stats.tx_packets ++;
810 priv(dev)->stats.collisions += (nop.nop_status & STAT_COLLISIONS);
812 priv(dev)->stats.tx_errors ++;
814 if (nop.nop_status & STAT_COLLAFTERTX)
815 priv(dev)->stats.collisions ++;
816 if (nop.nop_status & STAT_NOCARRIER)
817 priv(dev)->stats.tx_carrier_errors ++;
818 if (nop.nop_status & STAT_TXLOSTCTS)
819 printk (KERN_WARNING "%s: cts lost\n", dev->name);
820 if (nop.nop_status & STAT_TXSLOWDMA)
821 priv(dev)->stats.tx_fifo_errors ++;
822 if (nop.nop_status & STAT_COLLEXCESSIVE)
823 priv(dev)->stats.collisions += 16;
826 if (nop.nop_link == caddr) {
827 printk (KERN_ERR "%s: tx buffer chaining error: tx command points to itself\n", dev->name);
831 caddr = nop.nop_link;
832 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE);
833 if ((nop.nop_command & CMD_MASK) != CMD_NOP) {
834 printk (KERN_ERR "%s: tx buffer chaining error: no nop after tx command\n", dev->name);
838 if (caddr == nop.nop_link)
841 caddr = nop.nop_link;
842 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE);
843 if ((nop.nop_command & CMD_MASK) != CMD_TX) {
844 printk (KERN_ERR "%s: tx buffer chaining error: no tx command after nop\n", dev->name);
848 priv(dev)->tx_tail = caddr;
850 caddr = priv(dev)->tx_head;
851 tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN);
852 priv(dev)->tx_head = caddr;
854 netif_wake_queue(dev);
858 ether1_recv_done (struct net_device *dev)
861 int nexttail, rbdaddr;
865 status = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_status, NORMALIRQS);
866 if ((status & RFD_COMPLETE) == 0)
869 rbdaddr = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_rbdoffset, NORMALIRQS);
870 ether1_readbuffer (dev, &rbd, rbdaddr, RBD_SIZE);
872 if ((rbd.rbd_status & (RBD_EOF | RBD_ACNTVALID)) == (RBD_EOF | RBD_ACNTVALID)) {
873 int length = rbd.rbd_status & RBD_ACNT;
876 length = (length + 1) & ~1;
877 skb = dev_alloc_skb (length + 2);
881 skb_reserve (skb, 2);
883 ether1_readbuffer (dev, skb_put (skb, length), rbd.rbd_bufl, length);
885 skb->protocol = eth_type_trans (skb, dev);
887 priv(dev)->stats.rx_packets ++;
889 priv(dev)->stats.rx_dropped ++;
891 printk(KERN_WARNING "%s: %s\n", dev->name,
892 (rbd.rbd_status & RBD_EOF) ? "oversized packet" : "acnt not valid");
893 priv(dev)->stats.rx_dropped ++;
896 nexttail = ether1_readw(dev, priv(dev)->rx_tail, rfd_t, rfd_link, NORMALIRQS);
897 /* nexttail should be rx_head */
898 if (nexttail != priv(dev)->rx_head)
899 printk(KERN_ERR "%s: receiver buffer chaining error (%04X != %04X)\n",
900 dev->name, nexttail, priv(dev)->rx_head);
901 ether1_writew(dev, RFD_CMDEL | RFD_CMDSUSPEND, nexttail, rfd_t, rfd_command, NORMALIRQS);
902 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_command, NORMALIRQS);
903 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_status, NORMALIRQS);
904 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_rbdoffset, NORMALIRQS);
906 priv(dev)->rx_tail = nexttail;
907 priv(dev)->rx_head = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_link, NORMALIRQS);
912 ether1_interrupt (int irq, void *dev_id, struct pt_regs *regs)
914 struct net_device *dev = (struct net_device *)dev_id;
917 status = ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS);
920 ether1_writew(dev, status & (SCB_STRNR | SCB_STCNA | SCB_STFR | SCB_STCX),
921 SCB_ADDR, scb_t, scb_command, NORMALIRQS);
922 writeb(CTRL_CA | CTRL_ACK, REG_CONTROL);
923 if (status & SCB_STCX) {
924 ether1_xmit_done (dev);
926 if (status & SCB_STCNA) {
927 if (priv(dev)->resetting == 0)
928 printk (KERN_WARNING "%s: CU went not ready ???\n", dev->name);
930 priv(dev)->resetting += 1;
931 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS)
932 != (unsigned short)I82586_NULL) {
933 ether1_writew(dev, SCB_CMDCUCSTART, SCB_ADDR, scb_t, scb_command, NORMALIRQS);
934 writeb(CTRL_CA, REG_CONTROL);
936 if (priv(dev)->resetting == 2)
937 priv(dev)->resetting = 0;
939 if (status & SCB_STFR) {
940 ether1_recv_done (dev);
942 if (status & SCB_STRNR) {
943 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS) & SCB_STRXSUSP) {
944 printk (KERN_WARNING "%s: RU went not ready: RU suspended\n", dev->name);
945 ether1_writew(dev, SCB_CMDRXRESUME, SCB_ADDR, scb_t, scb_command, NORMALIRQS);
946 writeb(CTRL_CA, REG_CONTROL);
947 priv(dev)->stats.rx_dropped ++; /* we suspended due to lack of buffer space */
949 printk(KERN_WARNING "%s: RU went not ready: %04X\n", dev->name,
950 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS));
951 printk (KERN_WARNING "RU ptr = %04X\n", ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset,
955 writeb(CTRL_ACK, REG_CONTROL);
961 ether1_close (struct net_device *dev)
965 free_irq(dev->irq, dev);
970 static struct net_device_stats *
971 ether1_getstats (struct net_device *dev)
973 return &priv(dev)->stats;
977 * Set or clear the multicast filter for this adaptor.
978 * num_addrs == -1 Promiscuous mode, receive all packets.
979 * num_addrs == 0 Normal mode, clear multicast list.
980 * num_addrs > 0 Multicast mode, receive normal and MC packets, and do
981 * best-effort filtering.
984 ether1_setmulticastlist (struct net_device *dev)
988 /* ------------------------------------------------------------------------- */
990 static void __init ether1_banner(void)
992 static unsigned int version_printed = 0;
994 if (net_debug && version_printed++ == 0)
995 printk(KERN_INFO "%s", version);
999 ether1_probe(struct expansion_card *ec, const struct ecard_id *id)
1001 struct net_device *dev;
1006 ret = ecard_request_resources(ec);
1010 dev = alloc_etherdev(sizeof(struct ether1_priv));
1016 SET_MODULE_OWNER(dev);
1017 SET_NETDEV_DEV(dev, &ec->dev);
1020 priv(dev)->base = ioremap(ecard_resource_start(ec, ECARD_RES_IOCFAST),
1021 ecard_resource_len(ec, ECARD_RES_IOCFAST));
1022 if (!priv(dev)->base) {
1027 if ((priv(dev)->bus_type = ether1_reset(dev)) == 0) {
1032 for (i = 0; i < 6; i++)
1033 dev->dev_addr[i] = readb(IDPROM_ADDRESS + (i << 2));
1035 if (ether1_init_2(dev)) {
1040 dev->open = ether1_open;
1041 dev->stop = ether1_close;
1042 dev->hard_start_xmit = ether1_sendpacket;
1043 dev->get_stats = ether1_getstats;
1044 dev->set_multicast_list = ether1_setmulticastlist;
1045 dev->tx_timeout = ether1_timeout;
1046 dev->watchdog_timeo = 5 * HZ / 100;
1048 ret = register_netdev(dev);
1052 printk(KERN_INFO "%s: ether1 in slot %d, ",
1053 dev->name, ec->slot_no);
1055 for (i = 0; i < 6; i++)
1056 printk ("%2.2x%c", dev->dev_addr[i], i == 5 ? '\n' : ':');
1058 ecard_set_drvdata(ec, dev);
1062 if (priv(dev)->base)
1063 iounmap(priv(dev)->base);
1066 ecard_release_resources(ec);
1071 static void __devexit ether1_remove(struct expansion_card *ec)
1073 struct net_device *dev = ecard_get_drvdata(ec);
1075 ecard_set_drvdata(ec, NULL);
1077 unregister_netdev(dev);
1078 iounmap(priv(dev)->base);
1080 ecard_release_resources(ec);
1083 static const struct ecard_id ether1_ids[] = {
1084 { MANU_ACORN, PROD_ACORN_ETHER1 },
1088 static struct ecard_driver ether1_driver = {
1089 .probe = ether1_probe,
1090 .remove = __devexit_p(ether1_remove),
1091 .id_table = ether1_ids,
1097 static int __init ether1_init(void)
1099 return ecard_register_driver(ðer1_driver);
1102 static void __exit ether1_exit(void)
1104 ecard_remove_driver(ðer1_driver);
1107 module_init(ether1_init);
1108 module_exit(ether1_exit);
1110 MODULE_LICENSE("GPL");