1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/drivers/acorn/net/ether1.c
5 * Copyright (C) 1996-2000 Russell King
7 * Acorn ether1 driver (82586 chip) for Acorn machines
9 * We basically keep two queues in the cards memory - one for transmit
10 * and one for receive. Each has a head and a tail. The head is where
11 * we/the chip adds packets to be transmitted/received, and the tail
12 * is where the transmitter has got to/where the receiver will stop.
13 * Both of these queues are circular, and since the chip is running
14 * all the time, we have to be careful when we modify the pointers etc
15 * so that the buffer memory contents is valid all the time.
19 * 1.01 RMK 19/03/1996 Transfers the last odd byte onto/off of the card now.
20 * 1.02 RMK 25/05/1997 Added code to restart RU if it goes not ready
21 * 1.03 RMK 14/09/1997 Cleaned up the handling of a reset during the TX interrupt.
22 * Should prevent lockup.
23 * 1.04 RMK 17/09/1997 Added more info when initialsation of chip goes wrong.
24 * TDR now only reports failure when chip reports non-zero
26 * 1.05 RMK 31/12/1997 Removed calls to dev_tint for 2.1
27 * 1.06 RMK 10/02/2000 Updated for 2.3.43
28 * 1.07 RMK 13/05/2000 Updated for 2.3.99-pre8
31 #include <linux/module.h>
32 #include <linux/kernel.h>
33 #include <linux/types.h>
34 #include <linux/fcntl.h>
35 #include <linux/interrupt.h>
36 #include <linux/ioport.h>
38 #include <linux/slab.h>
39 #include <linux/string.h>
40 #include <linux/errno.h>
41 #include <linux/device.h>
42 #include <linux/init.h>
43 #include <linux/netdevice.h>
44 #include <linux/etherdevice.h>
45 #include <linux/skbuff.h>
46 #include <linux/bitops.h>
50 #include <asm/ecard.h>
55 static unsigned int net_debug = NET_DEBUG;
57 #define BUFFER_SIZE 0x10000
58 #define TX_AREA_START 0x00100
59 #define TX_AREA_END 0x05000
60 #define RX_AREA_START 0x05000
61 #define RX_AREA_END 0x0fc00
63 static int ether1_open(struct net_device *dev);
64 static netdev_tx_t ether1_sendpacket(struct sk_buff *skb,
65 struct net_device *dev);
66 static irqreturn_t ether1_interrupt(int irq, void *dev_id);
67 static int ether1_close(struct net_device *dev);
68 static void ether1_setmulticastlist(struct net_device *dev);
69 static void ether1_timeout(struct net_device *dev, unsigned int txqueue);
71 /* ------------------------------------------------------------------------- */
73 static char version[] = "ether1 ethernet driver (c) 2000 Russell King v1.07\n";
78 /* ------------------------------------------------------------------------- */
83 #define ether1_readw(dev, addr, type, offset, svflgs) ether1_inw_p (dev, addr + (int)(&((type *)0)->offset), svflgs)
84 #define ether1_writew(dev, val, addr, type, offset, svflgs) ether1_outw_p (dev, val, addr + (int)(&((type *)0)->offset), svflgs)
86 static inline unsigned short
87 ether1_inw_p (struct net_device *dev, int addr, int svflgs)
93 local_irq_save (flags);
95 writeb(addr >> 12, REG_PAGE);
96 ret = readw(ETHER1_RAM + ((addr & 4095) << 1));
98 local_irq_restore (flags);
103 ether1_outw_p (struct net_device *dev, unsigned short val, int addr, int svflgs)
108 local_irq_save (flags);
110 writeb(addr >> 12, REG_PAGE);
111 writew(val, ETHER1_RAM + ((addr & 4095) << 1));
113 local_irq_restore (flags);
117 * Some inline assembler to allow fast transfers on to/off of the card.
118 * Since this driver depends on some features presented by the ARM
119 * specific architecture, and that you can't configure this driver
120 * without specifiing ARM mode, this is not a problem.
122 * This routine is essentially an optimised memcpy from the card's
123 * onboard RAM to kernel memory.
126 ether1_writebuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length)
128 unsigned int page, thislen, offset;
131 offset = start & 4095;
133 addr = ETHER1_RAM + (offset << 1);
135 if (offset + length > 4096)
136 thislen = 4096 - offset;
143 writeb(page, REG_PAGE);
146 __asm__ __volatile__(
149 1: ldr %0, [%1], #2\n\
150 mov %0, %0, lsl #16\n\
151 orr %0, %0, %0, lsr #16\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\
173 2: adds %3, %3, #1\n\
176 : "=&r" (used), "=&r" (data)
177 : "r" (addr), "r" (thislen), "1" (data));
189 ether1_readbuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length)
191 unsigned int page, thislen, offset;
194 offset = start & 4095;
196 addr = ETHER1_RAM + (offset << 1);
198 if (offset + length > 4096)
199 thislen = 4096 - offset;
206 writeb(page, REG_PAGE);
209 __asm__ __volatile__(
212 1: ldr %0, [%2], #4\n\
214 mov %0, %0, lsr #8\n\
220 mov %0, %0, lsr #8\n\
226 mov %0, %0, lsr #8\n\
232 mov %0, %0, lsr #8\n\
236 2: adds %3, %3, #1\n\
239 : "=&r" (used), "=&r" (data)
240 : "r" (addr), "r" (thislen), "1" (data));
252 ether1_ramtest(struct net_device *dev, unsigned char byte)
254 unsigned char *buffer = kmalloc (BUFFER_SIZE, GFP_KERNEL);
255 int i, ret = BUFFER_SIZE;
263 memset (buffer, byte, BUFFER_SIZE);
264 ether1_writebuffer (dev, buffer, 0, BUFFER_SIZE);
265 memset (buffer, byte ^ 0xff, BUFFER_SIZE);
266 ether1_readbuffer (dev, buffer, 0, BUFFER_SIZE);
268 for (i = 0; i < BUFFER_SIZE; i++) {
269 if (buffer[i] != byte) {
270 if (max_errors >= 0 && bad != buffer[i]) {
273 printk (KERN_CRIT "%s: RAM failed with (%02X instead of %02X) at 0x%04X",
274 dev->name, buffer[i], byte, i);
282 if (bad_start == i - 1)
285 printk (" - 0x%04X\n", i - 1);
292 printk (" - 0x%04X\n", BUFFER_SIZE);
299 ether1_reset (struct net_device *dev)
301 writeb(CTRL_RST|CTRL_ACK, REG_CONTROL);
306 ether1_init_2(struct net_device *dev)
311 i = ether1_ramtest (dev, 0x5a);
314 i = ether1_ramtest (dev, 0x1e);
324 * These are the structures that are loaded into the ether RAM card to
325 * initialise the 82586
329 #define NOP_ADDR (TX_AREA_START)
330 #define NOP_SIZE (0x06)
331 static nop_t init_nop = {
338 #define TDR_ADDR (0x003a)
339 #define TDR_SIZE (0x08)
340 static tdr_t init_tdr = {
348 #define MC_ADDR (0x002e)
349 #define MC_SIZE (0x0c)
350 static mc_t init_mc = {
359 #define SA_ADDR (0x0022)
360 #define SA_SIZE (0x0c)
361 static sa_t init_sa = {
369 #define CFG_ADDR (0x0010)
370 #define CFG_SIZE (0x12)
371 static cfg_t init_cfg = {
378 CFG9_PREAMB8 | CFG9_ADDRLENBUF | CFG9_ADDRLEN(6),
382 CFG13_RETRY(15) | CFG13_SLOTH(2),
387 #define SCB_ADDR (0x0000)
388 #define SCB_SIZE (0x10)
389 static scb_t init_scb = {
391 SCB_CMDACKRNR | SCB_CMDACKCNA | SCB_CMDACKFR | SCB_CMDACKCX,
401 #define ISCP_ADDR (0xffee)
402 #define ISCP_SIZE (0x08)
403 static iscp_t init_iscp = {
411 #define SCP_ADDR (0xfff6)
412 #define SCP_SIZE (0x0a)
413 static scp_t init_scp = {
420 #define RFD_SIZE (0x16)
421 static rfd_t init_rfd = {
431 #define RBD_SIZE (0x0a)
432 static rbd_t init_rbd = {
440 #define TX_SIZE (0x08)
441 #define TBD_SIZE (0x08)
444 ether1_init_for_open (struct net_device *dev)
446 int i, status, addr, next, next2;
448 unsigned long timeout;
450 writeb(CTRL_RST|CTRL_ACK, REG_CONTROL);
452 for (i = 0; i < 6; i++)
453 init_sa.sa_addr[i] = dev->dev_addr[i];
455 /* load data structures into ether1 RAM */
456 ether1_writebuffer (dev, &init_scp, SCP_ADDR, SCP_SIZE);
457 ether1_writebuffer (dev, &init_iscp, ISCP_ADDR, ISCP_SIZE);
458 ether1_writebuffer (dev, &init_scb, SCB_ADDR, SCB_SIZE);
459 ether1_writebuffer (dev, &init_cfg, CFG_ADDR, CFG_SIZE);
460 ether1_writebuffer (dev, &init_sa, SA_ADDR, SA_SIZE);
461 ether1_writebuffer (dev, &init_mc, MC_ADDR, MC_SIZE);
462 ether1_writebuffer (dev, &init_tdr, TDR_ADDR, TDR_SIZE);
463 ether1_writebuffer (dev, &init_nop, NOP_ADDR, NOP_SIZE);
465 if (ether1_readw(dev, CFG_ADDR, cfg_t, cfg_command, NORMALIRQS) != CMD_CONFIG) {
466 printk (KERN_ERR "%s: detected either RAM fault or compiler bug\n",
472 * setup circularly linked list of { rfd, rbd, buffer }, with
473 * all rfds circularly linked, rbds circularly linked.
474 * First rfd is linked to scp, first rbd is linked to first
475 * rfd. Last rbd has a suspend command.
477 addr = RX_AREA_START;
479 next = addr + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10;
480 next2 = next + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10;
482 if (next2 >= RX_AREA_END) {
483 next = RX_AREA_START;
484 init_rfd.rfd_command = RFD_CMDEL | RFD_CMDSUSPEND;
485 priv(dev)->rx_tail = addr;
487 init_rfd.rfd_command = 0;
488 if (addr == RX_AREA_START)
489 init_rfd.rfd_rbdoffset = addr + RFD_SIZE;
491 init_rfd.rfd_rbdoffset = 0;
492 init_rfd.rfd_link = next;
493 init_rbd.rbd_link = next + RFD_SIZE;
494 init_rbd.rbd_bufl = addr + RFD_SIZE + RBD_SIZE;
496 ether1_writebuffer (dev, &init_rfd, addr, RFD_SIZE);
497 ether1_writebuffer (dev, &init_rbd, addr + RFD_SIZE, RBD_SIZE);
499 } while (next2 < RX_AREA_END);
501 priv(dev)->tx_link = NOP_ADDR;
502 priv(dev)->tx_head = NOP_ADDR + NOP_SIZE;
503 priv(dev)->tx_tail = TDR_ADDR;
504 priv(dev)->rx_head = RX_AREA_START;
506 /* release reset & give 586 a prod */
507 priv(dev)->resetting = 1;
508 priv(dev)->initialising = 1;
509 writeb(CTRL_RST, REG_CONTROL);
510 writeb(0, REG_CONTROL);
511 writeb(CTRL_CA, REG_CONTROL);
513 /* 586 should now unset iscp.busy */
514 timeout = jiffies + HZ/2;
515 while (ether1_readw(dev, ISCP_ADDR, iscp_t, iscp_busy, DISABLEIRQS) == 1) {
516 if (time_after(jiffies, timeout)) {
517 printk (KERN_WARNING "%s: can't initialise 82586: iscp is busy\n", dev->name);
522 /* check status of commands that we issued */
524 while (((status = ether1_readw(dev, CFG_ADDR, cfg_t, cfg_status, DISABLEIRQS))
525 & STAT_COMPLETE) == 0) {
526 if (time_after(jiffies, timeout))
530 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
531 printk (KERN_WARNING "%s: can't initialise 82586: config status %04X\n", dev->name, status);
532 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
533 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
534 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
535 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
536 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
541 while (((status = ether1_readw(dev, SA_ADDR, sa_t, sa_status, DISABLEIRQS))
542 & STAT_COMPLETE) == 0) {
543 if (time_after(jiffies, timeout))
547 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
548 printk (KERN_WARNING "%s: can't initialise 82586: set address status %04X\n", dev->name, status);
549 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
550 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
551 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
552 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
553 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
558 while (((status = ether1_readw(dev, MC_ADDR, mc_t, mc_status, DISABLEIRQS))
559 & STAT_COMPLETE) == 0) {
560 if (time_after(jiffies, timeout))
564 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
565 printk (KERN_WARNING "%s: can't initialise 82586: set multicast status %04X\n", dev->name, status);
566 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
567 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
568 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
569 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
570 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
575 while (((status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_status, DISABLEIRQS))
576 & STAT_COMPLETE) == 0) {
577 if (time_after(jiffies, timeout))
581 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
582 printk (KERN_WARNING "%s: can't tdr (ignored)\n", dev->name);
583 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
584 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
585 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
586 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
587 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
589 status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_result, DISABLEIRQS);
590 if (status & TDR_XCVRPROB)
591 printk (KERN_WARNING "%s: i/f failed tdr: transceiver problem\n", dev->name);
592 else if ((status & (TDR_SHORT|TDR_OPEN)) && (status & TDR_TIME)) {
594 printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d.%d us away\n", dev->name,
595 status & TDR_SHORT ? "short" : "open", (status & TDR_TIME) / 10,
596 (status & TDR_TIME) % 10);
598 printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d clks away\n", dev->name,
599 status & TDR_SHORT ? "short" : "open", (status & TDR_TIME));
606 return failures ? 1 : 0;
609 /* ------------------------------------------------------------------------- */
612 ether1_txalloc (struct net_device *dev, int size)
616 size = (size + 1) & ~1;
617 tail = priv(dev)->tx_tail;
619 if (priv(dev)->tx_head + size > TX_AREA_END) {
620 if (tail > priv(dev)->tx_head)
622 start = TX_AREA_START;
623 if (start + size > tail)
625 priv(dev)->tx_head = start + size;
627 if (priv(dev)->tx_head < tail && (priv(dev)->tx_head + size) > tail)
629 start = priv(dev)->tx_head;
630 priv(dev)->tx_head += size;
637 ether1_open (struct net_device *dev)
639 if (request_irq(dev->irq, ether1_interrupt, 0, "ether1", dev))
642 if (ether1_init_for_open (dev)) {
643 free_irq (dev->irq, dev);
647 netif_start_queue(dev);
653 ether1_timeout(struct net_device *dev, unsigned int txqueue)
655 printk(KERN_WARNING "%s: transmit timeout, network cable problem?\n",
657 printk(KERN_WARNING "%s: resetting device\n", dev->name);
661 if (ether1_init_for_open (dev))
662 printk (KERN_ERR "%s: unable to restart interface\n", dev->name);
664 dev->stats.tx_errors++;
665 netif_wake_queue(dev);
669 ether1_sendpacket (struct sk_buff *skb, struct net_device *dev)
671 int tmp, tst, nopaddr, txaddr, tbdaddr, dataddr;
677 if (priv(dev)->restart) {
678 printk(KERN_WARNING "%s: resetting device\n", dev->name);
682 if (ether1_init_for_open(dev))
683 printk(KERN_ERR "%s: unable to restart interface\n", dev->name);
685 priv(dev)->restart = 0;
688 if (skb->len < ETH_ZLEN) {
689 if (skb_padto(skb, ETH_ZLEN))
694 * insert packet followed by a nop
696 txaddr = ether1_txalloc (dev, TX_SIZE);
697 tbdaddr = ether1_txalloc (dev, TBD_SIZE);
698 dataddr = ether1_txalloc (dev, skb->len);
699 nopaddr = ether1_txalloc (dev, NOP_SIZE);
702 tx.tx_command = CMD_TX | CMD_INTR;
703 tx.tx_link = nopaddr;
704 tx.tx_tbdoffset = tbdaddr;
705 tbd.tbd_opts = TBD_EOL | skb->len;
706 tbd.tbd_link = I82586_NULL;
707 tbd.tbd_bufl = dataddr;
710 nop.nop_command = CMD_NOP;
711 nop.nop_link = nopaddr;
713 local_irq_save(flags);
714 ether1_writebuffer (dev, &tx, txaddr, TX_SIZE);
715 ether1_writebuffer (dev, &tbd, tbdaddr, TBD_SIZE);
716 ether1_writebuffer (dev, skb->data, dataddr, skb->len);
717 ether1_writebuffer (dev, &nop, nopaddr, NOP_SIZE);
718 tmp = priv(dev)->tx_link;
719 priv(dev)->tx_link = nopaddr;
721 /* now reset the previous nop pointer */
722 ether1_writew(dev, txaddr, tmp, nop_t, nop_link, NORMALIRQS);
724 local_irq_restore(flags);
726 /* handle transmit */
728 /* check to see if we have room for a full sized ether frame */
729 tmp = priv(dev)->tx_head;
730 tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN);
731 priv(dev)->tx_head = tmp;
735 netif_stop_queue(dev);
742 ether1_xmit_done (struct net_device *dev)
747 caddr = priv(dev)->tx_tail;
750 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE);
752 switch (nop.nop_command & CMD_MASK) {
755 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS)
756 != (unsigned short)I82586_NULL) {
757 ether1_writew(dev, SCB_CMDCUCSTART | SCB_CMDRXSTART, SCB_ADDR, scb_t,
758 scb_command, NORMALIRQS);
759 writeb(CTRL_CA, REG_CONTROL);
761 priv(dev)->tx_tail = NOP_ADDR;
765 if (nop.nop_link == caddr) {
766 if (priv(dev)->initialising == 0)
767 printk (KERN_WARNING "%s: strange command complete with no tx command!\n", dev->name);
769 priv(dev)->initialising = 0;
772 if (caddr == nop.nop_link)
774 caddr = nop.nop_link;
778 if (nop.nop_status & STAT_COMPLETE)
780 printk (KERN_ERR "%s: strange command complete without completed command\n", dev->name);
781 priv(dev)->restart = 1;
785 printk (KERN_WARNING "%s: strange command %d complete! (offset %04X)", dev->name,
786 nop.nop_command & CMD_MASK, caddr);
787 priv(dev)->restart = 1;
791 while (nop.nop_status & STAT_COMPLETE) {
792 if (nop.nop_status & STAT_OK) {
793 dev->stats.tx_packets++;
794 dev->stats.collisions += (nop.nop_status & STAT_COLLISIONS);
796 dev->stats.tx_errors++;
798 if (nop.nop_status & STAT_COLLAFTERTX)
799 dev->stats.collisions++;
800 if (nop.nop_status & STAT_NOCARRIER)
801 dev->stats.tx_carrier_errors++;
802 if (nop.nop_status & STAT_TXLOSTCTS)
803 printk (KERN_WARNING "%s: cts lost\n", dev->name);
804 if (nop.nop_status & STAT_TXSLOWDMA)
805 dev->stats.tx_fifo_errors++;
806 if (nop.nop_status & STAT_COLLEXCESSIVE)
807 dev->stats.collisions += 16;
810 if (nop.nop_link == caddr) {
811 printk (KERN_ERR "%s: tx buffer chaining error: tx command points to itself\n", dev->name);
815 caddr = nop.nop_link;
816 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE);
817 if ((nop.nop_command & CMD_MASK) != CMD_NOP) {
818 printk (KERN_ERR "%s: tx buffer chaining error: no nop after tx command\n", dev->name);
822 if (caddr == nop.nop_link)
825 caddr = nop.nop_link;
826 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE);
827 if ((nop.nop_command & CMD_MASK) != CMD_TX) {
828 printk (KERN_ERR "%s: tx buffer chaining error: no tx command after nop\n", dev->name);
832 priv(dev)->tx_tail = caddr;
834 caddr = priv(dev)->tx_head;
835 tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN);
836 priv(dev)->tx_head = caddr;
838 netif_wake_queue(dev);
842 ether1_recv_done (struct net_device *dev)
845 int nexttail, rbdaddr;
849 status = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_status, NORMALIRQS);
850 if ((status & RFD_COMPLETE) == 0)
853 rbdaddr = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_rbdoffset, NORMALIRQS);
854 ether1_readbuffer (dev, &rbd, rbdaddr, RBD_SIZE);
856 if ((rbd.rbd_status & (RBD_EOF | RBD_ACNTVALID)) == (RBD_EOF | RBD_ACNTVALID)) {
857 int length = rbd.rbd_status & RBD_ACNT;
860 length = (length + 1) & ~1;
861 skb = netdev_alloc_skb(dev, length + 2);
864 skb_reserve (skb, 2);
866 ether1_readbuffer (dev, skb_put (skb, length), rbd.rbd_bufl, length);
868 skb->protocol = eth_type_trans (skb, dev);
870 dev->stats.rx_packets++;
872 dev->stats.rx_dropped++;
874 printk(KERN_WARNING "%s: %s\n", dev->name,
875 (rbd.rbd_status & RBD_EOF) ? "oversized packet" : "acnt not valid");
876 dev->stats.rx_dropped++;
879 nexttail = ether1_readw(dev, priv(dev)->rx_tail, rfd_t, rfd_link, NORMALIRQS);
880 /* nexttail should be rx_head */
881 if (nexttail != priv(dev)->rx_head)
882 printk(KERN_ERR "%s: receiver buffer chaining error (%04X != %04X)\n",
883 dev->name, nexttail, priv(dev)->rx_head);
884 ether1_writew(dev, RFD_CMDEL | RFD_CMDSUSPEND, nexttail, rfd_t, rfd_command, NORMALIRQS);
885 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_command, NORMALIRQS);
886 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_status, NORMALIRQS);
887 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_rbdoffset, NORMALIRQS);
889 priv(dev)->rx_tail = nexttail;
890 priv(dev)->rx_head = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_link, NORMALIRQS);
895 ether1_interrupt (int irq, void *dev_id)
897 struct net_device *dev = (struct net_device *)dev_id;
900 status = ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS);
903 ether1_writew(dev, status & (SCB_STRNR | SCB_STCNA | SCB_STFR | SCB_STCX),
904 SCB_ADDR, scb_t, scb_command, NORMALIRQS);
905 writeb(CTRL_CA | CTRL_ACK, REG_CONTROL);
906 if (status & SCB_STCX) {
907 ether1_xmit_done (dev);
909 if (status & SCB_STCNA) {
910 if (priv(dev)->resetting == 0)
911 printk (KERN_WARNING "%s: CU went not ready ???\n", dev->name);
913 priv(dev)->resetting += 1;
914 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS)
915 != (unsigned short)I82586_NULL) {
916 ether1_writew(dev, SCB_CMDCUCSTART, SCB_ADDR, scb_t, scb_command, NORMALIRQS);
917 writeb(CTRL_CA, REG_CONTROL);
919 if (priv(dev)->resetting == 2)
920 priv(dev)->resetting = 0;
922 if (status & SCB_STFR) {
923 ether1_recv_done (dev);
925 if (status & SCB_STRNR) {
926 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS) & SCB_STRXSUSP) {
927 printk (KERN_WARNING "%s: RU went not ready: RU suspended\n", dev->name);
928 ether1_writew(dev, SCB_CMDRXRESUME, SCB_ADDR, scb_t, scb_command, NORMALIRQS);
929 writeb(CTRL_CA, REG_CONTROL);
930 dev->stats.rx_dropped++; /* we suspended due to lack of buffer space */
932 printk(KERN_WARNING "%s: RU went not ready: %04X\n", dev->name,
933 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS));
934 printk (KERN_WARNING "RU ptr = %04X\n", ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset,
938 writeb(CTRL_ACK, REG_CONTROL);
944 ether1_close (struct net_device *dev)
948 free_irq(dev->irq, dev);
954 * Set or clear the multicast filter for this adaptor.
955 * num_addrs == -1 Promiscuous mode, receive all packets.
956 * num_addrs == 0 Normal mode, clear multicast list.
957 * num_addrs > 0 Multicast mode, receive normal and MC packets, and do
958 * best-effort filtering.
961 ether1_setmulticastlist (struct net_device *dev)
965 /* ------------------------------------------------------------------------- */
967 static void ether1_banner(void)
969 static unsigned int version_printed = 0;
971 if (net_debug && version_printed++ == 0)
972 printk(KERN_INFO "%s", version);
975 static const struct net_device_ops ether1_netdev_ops = {
976 .ndo_open = ether1_open,
977 .ndo_stop = ether1_close,
978 .ndo_start_xmit = ether1_sendpacket,
979 .ndo_set_rx_mode = ether1_setmulticastlist,
980 .ndo_tx_timeout = ether1_timeout,
981 .ndo_validate_addr = eth_validate_addr,
982 .ndo_set_mac_address = eth_mac_addr,
986 ether1_probe(struct expansion_card *ec, const struct ecard_id *id)
988 struct net_device *dev;
993 ret = ecard_request_resources(ec);
997 dev = alloc_etherdev(sizeof(struct ether1_priv));
1003 SET_NETDEV_DEV(dev, &ec->dev);
1006 priv(dev)->base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
1007 if (!priv(dev)->base) {
1012 if ((priv(dev)->bus_type = ether1_reset(dev)) == 0) {
1017 for (i = 0; i < 6; i++)
1018 dev->dev_addr[i] = readb(IDPROM_ADDRESS + (i << 2));
1020 if (ether1_init_2(dev)) {
1025 dev->netdev_ops = ðer1_netdev_ops;
1026 dev->watchdog_timeo = 5 * HZ / 100;
1028 ret = register_netdev(dev);
1032 printk(KERN_INFO "%s: ether1 in slot %d, %pM\n",
1033 dev->name, ec->slot_no, dev->dev_addr);
1035 ecard_set_drvdata(ec, dev);
1041 ecard_release_resources(ec);
1046 static void ether1_remove(struct expansion_card *ec)
1048 struct net_device *dev = ecard_get_drvdata(ec);
1050 ecard_set_drvdata(ec, NULL);
1052 unregister_netdev(dev);
1054 ecard_release_resources(ec);
1057 static const struct ecard_id ether1_ids[] = {
1058 { MANU_ACORN, PROD_ACORN_ETHER1 },
1062 static struct ecard_driver ether1_driver = {
1063 .probe = ether1_probe,
1064 .remove = ether1_remove,
1065 .id_table = ether1_ids,
1071 static int __init ether1_init(void)
1073 return ecard_register_driver(ðer1_driver);
1076 static void __exit ether1_exit(void)
1078 ecard_remove_driver(ðer1_driver);
1081 module_init(ether1_init);
1082 module_exit(ether1_exit);
1084 MODULE_LICENSE("GPL");