ether1.c
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上传日期:2013-04-10
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- /*
- * linux/drivers/acorn/net/ether1.c
- *
- * Copyright (C) 1996-2000 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Acorn ether1 driver (82586 chip) for Acorn machines
- *
- * We basically keep two queues in the cards memory - one for transmit
- * and one for receive. Each has a head and a tail. The head is where
- * we/the chip adds packets to be transmitted/received, and the tail
- * is where the transmitter has got to/where the receiver will stop.
- * Both of these queues are circular, and since the chip is running
- * all the time, we have to be careful when we modify the pointers etc
- * so that the buffer memory contents is valid all the time.
- *
- * Change log:
- * 1.00 RMK Released
- * 1.01 RMK 19/03/1996 Transfers the last odd byte onto/off of the card now.
- * 1.02 RMK 25/05/1997 Added code to restart RU if it goes not ready
- * 1.03 RMK 14/09/1997 Cleaned up the handling of a reset during the TX interrupt.
- * Should prevent lockup.
- * 1.04 RMK 17/09/1997 Added more info when initialsation of chip goes wrong.
- * TDR now only reports failure when chip reports non-zero
- * TDR time-distance.
- * 1.05 RMK 31/12/1997 Removed calls to dev_tint for 2.1
- * 1.06 RMK 10/02/2000 Updated for 2.3.43
- * 1.07 RMK 13/05/2000 Updated for 2.3.99-pre8
- */
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/types.h>
- #include <linux/fcntl.h>
- #include <linux/interrupt.h>
- #include <linux/ptrace.h>
- #include <linux/ioport.h>
- #include <linux/in.h>
- #include <linux/slab.h>
- #include <linux/string.h>
- #include <linux/errno.h>
- #include <linux/init.h>
- #include <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include <linux/skbuff.h>
- #include <asm/system.h>
- #include <asm/bitops.h>
- #include <asm/io.h>
- #include <asm/dma.h>
- #include <asm/ecard.h>
- #define __ETHER1_C
- #include "ether1.h"
- static unsigned int net_debug = NET_DEBUG;
- #define BUFFER_SIZE 0x10000
- #define TX_AREA_START 0x00100
- #define TX_AREA_END 0x05000
- #define RX_AREA_START 0x05000
- #define RX_AREA_END 0x0fc00
- static int ether1_open(struct net_device *dev);
- static int ether1_sendpacket(struct sk_buff *skb, struct net_device *dev);
- static void ether1_interrupt(int irq, void *dev_id, struct pt_regs *regs);
- static int ether1_close(struct net_device *dev);
- static struct net_device_stats *ether1_getstats(struct net_device *dev);
- static void ether1_setmulticastlist(struct net_device *dev);
- static void ether1_timeout(struct net_device *dev);
- /* ------------------------------------------------------------------------- */
- static char version[] __initdata = "ether1 ethernet driver (c) 2000 Russell King v1.07n";
- #define BUS_16 16
- #define BUS_8 8
- static const card_ids __init ether1_cids[] = {
- { MANU_ACORN, PROD_ACORN_ETHER1 },
- { 0xffff, 0xffff }
- };
- /* ------------------------------------------------------------------------- */
- #define DISABLEIRQS 1
- #define NORMALIRQS 0
- #define ether1_inw(dev, addr, type, offset, svflgs) ether1_inw_p (dev, addr + (int)(&((type *)0)->offset), svflgs)
- #define ether1_outw(dev, val, addr, type, offset, svflgs) ether1_outw_p (dev, val, addr + (int)(&((type *)0)->offset), svflgs)
- static inline unsigned short
- ether1_inw_p (struct net_device *dev, int addr, int svflgs)
- {
- unsigned long flags;
- unsigned short ret;
- if (svflgs) {
- save_flags_cli (flags);
- }
- outb (addr >> 12, REG_PAGE);
- ret = inw (ETHER1_RAM + ((addr & 4095) >> 1));
- if (svflgs)
- restore_flags (flags);
- return ret;
- }
- static inline void
- ether1_outw_p (struct net_device *dev, unsigned short val, int addr, int svflgs)
- {
- unsigned long flags;
- if (svflgs) {
- save_flags_cli (flags);
- }
- outb (addr >> 12, REG_PAGE);
- outw (val, ETHER1_RAM + ((addr & 4095) >> 1));
- if (svflgs)
- restore_flags (flags);
- }
- /*
- * Some inline assembler to allow fast transfers on to/off of the card.
- * Since this driver depends on some features presented by the ARM
- * specific architecture, and that you can't configure this driver
- * without specifiing ARM mode, this is not a problem.
- *
- * This routine is essentially an optimised memcpy from the card's
- * onboard RAM to kernel memory.
- */
- static void
- ether1_writebuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length)
- {
- unsigned int page, thislen, offset, addr;
- offset = start & 4095;
- page = start >> 12;
- addr = ioaddr(ETHER1_RAM + (offset >> 1));
- if (offset + length > 4096)
- thislen = 4096 - offset;
- else
- thislen = length;
- do {
- int used;
- outb(page, REG_PAGE);
- length -= thislen;
- __asm__ __volatile__(
- "subs %3, %3, #2
- bmi 2f
- 1: ldr %0, [%1], #2
- mov %0, %0, lsl #16
- orr %0, %0, %0, lsr #16
- str %0, [%2], #4
- subs %3, %3, #2
- bmi 2f
- ldr %0, [%1], #2
- mov %0, %0, lsl #16
- orr %0, %0, %0, lsr #16
- str %0, [%2], #4
- subs %3, %3, #2
- bmi 2f
- ldr %0, [%1], #2
- mov %0, %0, lsl #16
- orr %0, %0, %0, lsr #16
- str %0, [%2], #4
- subs %3, %3, #2
- bmi 2f
- ldr %0, [%1], #2
- mov %0, %0, lsl #16
- orr %0, %0, %0, lsr #16
- str %0, [%2], #4
- subs %3, %3, #2
- bpl 1b
- 2: adds %3, %3, #1
- ldreqb %0, [%1]
- streqb %0, [%2]"
- : "=&r" (used), "=&r" (data)
- : "r" (addr), "r" (thislen), "1" (data));
- addr = ioaddr(ETHER1_RAM);
- thislen = length;
- if (thislen > 4096)
- thislen = 4096;
- page++;
- } while (thislen);
- }
- static void
- ether1_readbuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length)
- {
- unsigned int page, thislen, offset, addr;
- offset = start & 4095;
- page = start >> 12;
- addr = ioaddr(ETHER1_RAM + (offset >> 1));
- if (offset + length > 4096)
- thislen = 4096 - offset;
- else
- thislen = length;
- do {
- int used;
- outb(page, REG_PAGE);
- length -= thislen;
- __asm__ __volatile__(
- "subs %3, %3, #2
- bmi 2f
- 1: ldr %0, [%2], #4
- strb %0, [%1], #1
- mov %0, %0, lsr #8
- strb %0, [%1], #1
- subs %3, %3, #2
- bmi 2f
- ldr %0, [%2], #4
- strb %0, [%1], #1
- mov %0, %0, lsr #8
- strb %0, [%1], #1
- subs %3, %3, #2
- bmi 2f
- ldr %0, [%2], #4
- strb %0, [%1], #1
- mov %0, %0, lsr #8
- strb %0, [%1], #1
- subs %3, %3, #2
- bmi 2f
- ldr %0, [%2], #4
- strb %0, [%1], #1
- mov %0, %0, lsr #8
- strb %0, [%1], #1
- subs %3, %3, #2
- bpl 1b
- 2: adds %3, %3, #1
- ldreqb %0, [%2]
- streqb %0, [%1]"
- : "=&r" (used), "=&r" (data)
- : "r" (addr), "r" (thislen), "1" (data));
- addr = ioaddr(ETHER1_RAM);
- thislen = length;
- if (thislen > 4096)
- thislen = 4096;
- page++;
- } while (thislen);
- }
- static int __init
- ether1_ramtest(struct net_device *dev, unsigned char byte)
- {
- unsigned char *buffer = kmalloc (BUFFER_SIZE, GFP_KERNEL);
- int i, ret = BUFFER_SIZE;
- int max_errors = 15;
- int bad = -1;
- int bad_start = 0;
- if (!buffer)
- return 1;
- memset (buffer, byte, BUFFER_SIZE);
- ether1_writebuffer (dev, buffer, 0, BUFFER_SIZE);
- memset (buffer, byte ^ 0xff, BUFFER_SIZE);
- ether1_readbuffer (dev, buffer, 0, BUFFER_SIZE);
- for (i = 0; i < BUFFER_SIZE; i++) {
- if (buffer[i] != byte) {
- if (max_errors >= 0 && bad != buffer[i]) {
- if (bad != -1)
- printk ("n");
- printk (KERN_CRIT "%s: RAM failed with (%02X instead of %02X) at 0x%04X",
- dev->name, buffer[i], byte, i);
- ret = -ENODEV;
- max_errors --;
- bad = buffer[i];
- bad_start = i;
- }
- } else {
- if (bad != -1) {
- if (bad_start == i - 1)
- printk ("n");
- else
- printk (" - 0x%04Xn", i - 1);
- bad = -1;
- }
- }
- }
- if (bad != -1)
- printk (" - 0x%04Xn", BUFFER_SIZE);
- kfree (buffer);
- return ret;
- }
- static int
- ether1_reset (struct net_device *dev)
- {
- outb (CTRL_RST|CTRL_ACK, REG_CONTROL);
- return BUS_16;
- }
- static int __init
- ether1_init_2(struct net_device *dev)
- {
- int i;
- dev->mem_start = 0;
- i = ether1_ramtest (dev, 0x5a);
- if (i > 0)
- i = ether1_ramtest (dev, 0x1e);
- if (i <= 0)
- return -ENODEV;
- dev->mem_end = i;
- return 0;
- }
- /*
- * These are the structures that are loaded into the ether RAM card to
- * initialise the 82586
- */
- /* at 0x0100 */
- #define NOP_ADDR (TX_AREA_START)
- #define NOP_SIZE (0x06)
- static nop_t init_nop = {
- 0,
- CMD_NOP,
- NOP_ADDR
- };
- /* at 0x003a */
- #define TDR_ADDR (0x003a)
- #define TDR_SIZE (0x08)
- static tdr_t init_tdr = {
- 0,
- CMD_TDR | CMD_INTR,
- NOP_ADDR,
- 0
- };
- /* at 0x002e */
- #define MC_ADDR (0x002e)
- #define MC_SIZE (0x0c)
- static mc_t init_mc = {
- 0,
- CMD_SETMULTICAST,
- TDR_ADDR,
- 0,
- { { 0, } }
- };
- /* at 0x0022 */
- #define SA_ADDR (0x0022)
- #define SA_SIZE (0x0c)
- static sa_t init_sa = {
- 0,
- CMD_SETADDRESS,
- MC_ADDR,
- { 0, }
- };
- /* at 0x0010 */
- #define CFG_ADDR (0x0010)
- #define CFG_SIZE (0x12)
- static cfg_t init_cfg = {
- 0,
- CMD_CONFIG,
- SA_ADDR,
- 8,
- 8,
- CFG8_SRDY,
- CFG9_PREAMB8 | CFG9_ADDRLENBUF | CFG9_ADDRLEN(6),
- 0,
- 0x60,
- 0,
- CFG13_RETRY(15) | CFG13_SLOTH(2),
- 0,
- };
- /* at 0x0000 */
- #define SCB_ADDR (0x0000)
- #define SCB_SIZE (0x10)
- static scb_t init_scb = {
- 0,
- SCB_CMDACKRNR | SCB_CMDACKCNA | SCB_CMDACKFR | SCB_CMDACKCX,
- CFG_ADDR,
- RX_AREA_START,
- 0,
- 0,
- 0,
- 0
- };
- /* at 0xffee */
- #define ISCP_ADDR (0xffee)
- #define ISCP_SIZE (0x08)
- static iscp_t init_iscp = {
- 1,
- SCB_ADDR,
- 0x0000,
- 0x0000
- };
- /* at 0xfff6 */
- #define SCP_ADDR (0xfff6)
- #define SCP_SIZE (0x0a)
- static scp_t init_scp = {
- SCP_SY_16BBUS,
- { 0, 0 },
- ISCP_ADDR,
- 0
- };
- #define RFD_SIZE (0x16)
- static rfd_t init_rfd = {
- 0,
- 0,
- 0,
- 0,
- { 0, },
- { 0, },
- 0
- };
- #define RBD_SIZE (0x0a)
- static rbd_t init_rbd = {
- 0,
- 0,
- 0,
- 0,
- ETH_FRAME_LEN + 8
- };
- #define TX_SIZE (0x08)
- #define TBD_SIZE (0x08)
- static int
- ether1_init_for_open (struct net_device *dev)
- {
- struct ether1_priv *priv = (struct ether1_priv *)dev->priv;
- int i, status, addr, next, next2;
- int failures = 0;
- outb (CTRL_RST|CTRL_ACK, REG_CONTROL);
- for (i = 0; i < 6; i++)
- init_sa.sa_addr[i] = dev->dev_addr[i];
- /* load data structures into ether1 RAM */
- ether1_writebuffer (dev, &init_scp, SCP_ADDR, SCP_SIZE);
- ether1_writebuffer (dev, &init_iscp, ISCP_ADDR, ISCP_SIZE);
- ether1_writebuffer (dev, &init_scb, SCB_ADDR, SCB_SIZE);
- ether1_writebuffer (dev, &init_cfg, CFG_ADDR, CFG_SIZE);
- ether1_writebuffer (dev, &init_sa, SA_ADDR, SA_SIZE);
- ether1_writebuffer (dev, &init_mc, MC_ADDR, MC_SIZE);
- ether1_writebuffer (dev, &init_tdr, TDR_ADDR, TDR_SIZE);
- ether1_writebuffer (dev, &init_nop, NOP_ADDR, NOP_SIZE);
- if (ether1_inw (dev, CFG_ADDR, cfg_t, cfg_command, NORMALIRQS) != CMD_CONFIG) {
- printk (KERN_ERR "%s: detected either RAM fault or compiler bugn",
- dev->name);
- return 1;
- }
- /*
- * setup circularly linked list of { rfd, rbd, buffer }, with
- * all rfds circularly linked, rbds circularly linked.
- * First rfd is linked to scp, first rbd is linked to first
- * rfd. Last rbd has a suspend command.
- */
- addr = RX_AREA_START;
- do {
- next = addr + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10;
- next2 = next + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10;
- if (next2 >= RX_AREA_END) {
- next = RX_AREA_START;
- init_rfd.rfd_command = RFD_CMDEL | RFD_CMDSUSPEND;
- priv->rx_tail = addr;
- } else
- init_rfd.rfd_command = 0;
- if (addr == RX_AREA_START)
- init_rfd.rfd_rbdoffset = addr + RFD_SIZE;
- else
- init_rfd.rfd_rbdoffset = 0;
- init_rfd.rfd_link = next;
- init_rbd.rbd_link = next + RFD_SIZE;
- init_rbd.rbd_bufl = addr + RFD_SIZE + RBD_SIZE;
- ether1_writebuffer (dev, &init_rfd, addr, RFD_SIZE);
- ether1_writebuffer (dev, &init_rbd, addr + RFD_SIZE, RBD_SIZE);
- addr = next;
- } while (next2 < RX_AREA_END);
- priv->tx_link = NOP_ADDR;
- priv->tx_head = NOP_ADDR + NOP_SIZE;
- priv->tx_tail = TDR_ADDR;
- priv->rx_head = RX_AREA_START;
- /* release reset & give 586 a prod */
- priv->resetting = 1;
- priv->initialising = 1;
- outb (CTRL_RST, REG_CONTROL);
- outb (0, REG_CONTROL);
- outb (CTRL_CA, REG_CONTROL);
- /* 586 should now unset iscp.busy */
- i = jiffies + HZ/2;
- while (ether1_inw (dev, ISCP_ADDR, iscp_t, iscp_busy, DISABLEIRQS) == 1) {
- if (time_after(jiffies, i)) {
- printk (KERN_WARNING "%s: can't initialise 82586: iscp is busyn", dev->name);
- return 1;
- }
- }
- /* check status of commands that we issued */
- i += HZ/10;
- while (((status = ether1_inw (dev, CFG_ADDR, cfg_t, cfg_status, DISABLEIRQS))
- & STAT_COMPLETE) == 0) {
- if (time_after(jiffies, i))
- break;
- }
- if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
- printk (KERN_WARNING "%s: can't initialise 82586: config status %04Xn", dev->name, status);
- printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]n", dev->name,
- ether1_inw (dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
- ether1_inw (dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
- ether1_inw (dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
- ether1_inw (dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
- failures += 1;
- }
- i += HZ/10;
- while (((status = ether1_inw (dev, SA_ADDR, sa_t, sa_status, DISABLEIRQS))
- & STAT_COMPLETE) == 0) {
- if (time_after(jiffies, i))
- break;
- }
- if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
- printk (KERN_WARNING "%s: can't initialise 82586: set address status %04Xn", dev->name, status);
- printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]n", dev->name,
- ether1_inw (dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
- ether1_inw (dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
- ether1_inw (dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
- ether1_inw (dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
- failures += 1;
- }
- i += HZ/10;
- while (((status = ether1_inw (dev, MC_ADDR, mc_t, mc_status, DISABLEIRQS))
- & STAT_COMPLETE) == 0) {
- if (time_after(jiffies, i))
- break;
- }
- if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
- printk (KERN_WARNING "%s: can't initialise 82586: set multicast status %04Xn", dev->name, status);
- printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]n", dev->name,
- ether1_inw (dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
- ether1_inw (dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
- ether1_inw (dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
- ether1_inw (dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
- failures += 1;
- }
- i += HZ;
- while (((status = ether1_inw (dev, TDR_ADDR, tdr_t, tdr_status, DISABLEIRQS))
- & STAT_COMPLETE) == 0) {
- if (time_after(jiffies, i))
- break;
- }
- if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
- printk (KERN_WARNING "%s: can't tdr (ignored)n", dev->name);
- printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]n", dev->name,
- ether1_inw (dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
- ether1_inw (dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
- ether1_inw (dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
- ether1_inw (dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
- } else {
- status = ether1_inw (dev, TDR_ADDR, tdr_t, tdr_result, DISABLEIRQS);
- if (status & TDR_XCVRPROB)
- printk (KERN_WARNING "%s: i/f failed tdr: transceiver problemn", dev->name);
- else if ((status & (TDR_SHORT|TDR_OPEN)) && (status & TDR_TIME)) {
- #ifdef FANCY
- printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d.%d us awayn", dev->name,
- status & TDR_SHORT ? "short" : "open", (status & TDR_TIME) / 10,
- (status & TDR_TIME) % 10);
- #else
- printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d clks awayn", dev->name,
- status & TDR_SHORT ? "short" : "open", (status & TDR_TIME));
- #endif
- }
- }
- if (failures)
- ether1_reset (dev);
- return failures ? 1 : 0;
- }
- /* ------------------------------------------------------------------------- */
- static int
- ether1_txalloc (struct net_device *dev, int size)
- {
- struct ether1_priv *priv = (struct ether1_priv *)dev->priv;
- int start, tail;
- size = (size + 1) & ~1;
- tail = priv->tx_tail;
- if (priv->tx_head + size > TX_AREA_END) {
- if (tail > priv->tx_head)
- return -1;
- start = TX_AREA_START;
- if (start + size > tail)
- return -1;
- priv->tx_head = start + size;
- } else {
- if (priv->tx_head < tail && (priv->tx_head + size) > tail)
- return -1;
- start = priv->tx_head;
- priv->tx_head += size;
- }
- return start;
- }
- static int
- ether1_open (struct net_device *dev)
- {
- struct ether1_priv *priv = (struct ether1_priv *)dev->priv;
- if (request_irq(dev->irq, ether1_interrupt, 0, "ether1", dev))
- return -EAGAIN;
- memset (&priv->stats, 0, sizeof (struct net_device_stats));
- if (ether1_init_for_open (dev)) {
- free_irq (dev->irq, dev);
- return -EAGAIN;
- }
- netif_start_queue(dev);
- return 0;
- }
- static void
- ether1_timeout(struct net_device *dev)
- {
- struct ether1_priv *priv = (struct ether1_priv *)dev->priv;
- printk(KERN_WARNING "%s: transmit timeout, network cable problem?n",
- dev->name);
- printk(KERN_WARNING "%s: resetting devicen", dev->name);
- ether1_reset (dev);
- if (ether1_init_for_open (dev))
- printk (KERN_ERR "%s: unable to restart interfacen", dev->name);
- priv->stats.tx_errors++;
- netif_wake_queue(dev);
- }
- static int
- ether1_sendpacket (struct sk_buff *skb, struct net_device *dev)
- {
- struct ether1_priv *priv = (struct ether1_priv *)dev->priv;
- int len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
- int tmp, tst, nopaddr, txaddr, tbdaddr, dataddr;
- unsigned long flags;
- tx_t tx;
- tbd_t tbd;
- nop_t nop;
- if (priv->restart) {
- printk(KERN_WARNING "%s: resetting devicen", dev->name);
- ether1_reset(dev);
- if (ether1_init_for_open(dev))
- printk(KERN_ERR "%s: unable to restart interfacen", dev->name);
- else
- priv->restart = 0;
- }
- /*
- * insert packet followed by a nop
- */
- txaddr = ether1_txalloc (dev, TX_SIZE);
- tbdaddr = ether1_txalloc (dev, TBD_SIZE);
- dataddr = ether1_txalloc (dev, len);
- nopaddr = ether1_txalloc (dev, NOP_SIZE);
- tx.tx_status = 0;
- tx.tx_command = CMD_TX | CMD_INTR;
- tx.tx_link = nopaddr;
- tx.tx_tbdoffset = tbdaddr;
- tbd.tbd_opts = TBD_EOL | len;
- tbd.tbd_link = I82586_NULL;
- tbd.tbd_bufl = dataddr;
- tbd.tbd_bufh = 0;
- nop.nop_status = 0;
- nop.nop_command = CMD_NOP;
- nop.nop_link = nopaddr;
- save_flags_cli(flags);
- ether1_writebuffer (dev, &tx, txaddr, TX_SIZE);
- ether1_writebuffer (dev, &tbd, tbdaddr, TBD_SIZE);
- ether1_writebuffer (dev, skb->data, dataddr, len);
- ether1_writebuffer (dev, &nop, nopaddr, NOP_SIZE);
- tmp = priv->tx_link;
- priv->tx_link = nopaddr;
- /* now reset the previous nop pointer */
- ether1_outw (dev, txaddr, tmp, nop_t, nop_link, NORMALIRQS);
- restore_flags(flags);
- /* handle transmit */
- dev->trans_start = jiffies;
- /* check to see if we have room for a full sized ether frame */
- tmp = priv->tx_head;
- tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN);
- priv->tx_head = tmp;
- dev_kfree_skb (skb);
- if (tst == -1)
- netif_stop_queue(dev);
- return 0;
- }
- static void
- ether1_xmit_done (struct net_device *dev)
- {
- struct ether1_priv *priv = (struct ether1_priv *)dev->priv;
- nop_t nop;
- int caddr, tst;
- caddr = priv->tx_tail;
- again:
- ether1_readbuffer (dev, &nop, caddr, NOP_SIZE);
- switch (nop.nop_command & CMD_MASK) {
- case CMD_TDR:
- /* special case */
- if (ether1_inw (dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS)
- != (unsigned short)I82586_NULL) {
- ether1_outw(dev, SCB_CMDCUCSTART | SCB_CMDRXSTART, SCB_ADDR, scb_t,
- scb_command, NORMALIRQS);
- outb (CTRL_CA, REG_CONTROL);
- }
- priv->tx_tail = NOP_ADDR;
- return;
- case CMD_NOP:
- if (nop.nop_link == caddr) {
- if (priv->initialising == 0)
- printk (KERN_WARNING "%s: strange command complete with no tx command!n", dev->name);
- else
- priv->initialising = 0;
- return;
- }
- if (caddr == nop.nop_link)
- return;
- caddr = nop.nop_link;
- goto again;
- case CMD_TX:
- if (nop.nop_status & STAT_COMPLETE)
- break;
- printk (KERN_ERR "%s: strange command complete without completed commandn", dev->name);
- priv->restart = 1;
- return;
- default:
- printk (KERN_WARNING "%s: strange command %d complete! (offset %04X)", dev->name,
- nop.nop_command & CMD_MASK, caddr);
- priv->restart = 1;
- return;
- }
- while (nop.nop_status & STAT_COMPLETE) {
- if (nop.nop_status & STAT_OK) {
- priv->stats.tx_packets ++;
- priv->stats.collisions += (nop.nop_status & STAT_COLLISIONS);
- } else {
- priv->stats.tx_errors ++;
- if (nop.nop_status & STAT_COLLAFTERTX)
- priv->stats.collisions ++;
- if (nop.nop_status & STAT_NOCARRIER)
- priv->stats.tx_carrier_errors ++;
- if (nop.nop_status & STAT_TXLOSTCTS)
- printk (KERN_WARNING "%s: cts lostn", dev->name);
- if (nop.nop_status & STAT_TXSLOWDMA)
- priv->stats.tx_fifo_errors ++;
- if (nop.nop_status & STAT_COLLEXCESSIVE)
- priv->stats.collisions += 16;
- }
- if (nop.nop_link == caddr) {
- printk (KERN_ERR "%s: tx buffer chaining error: tx command points to itselfn", dev->name);
- break;
- }
- caddr = nop.nop_link;
- ether1_readbuffer (dev, &nop, caddr, NOP_SIZE);
- if ((nop.nop_command & CMD_MASK) != CMD_NOP) {
- printk (KERN_ERR "%s: tx buffer chaining error: no nop after tx commandn", dev->name);
- break;
- }
- if (caddr == nop.nop_link)
- break;
- caddr = nop.nop_link;
- ether1_readbuffer (dev, &nop, caddr, NOP_SIZE);
- if ((nop.nop_command & CMD_MASK) != CMD_TX) {
- printk (KERN_ERR "%s: tx buffer chaining error: no tx command after nopn", dev->name);
- break;
- }
- }
- priv->tx_tail = caddr;
- caddr = priv->tx_head;
- tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN);
- priv->tx_head = caddr;
- if (tst != -1)
- netif_wake_queue(dev);
- }
- static void
- ether1_recv_done (struct net_device *dev)
- {
- struct ether1_priv *priv = (struct ether1_priv *)dev->priv;
- int status;
- int nexttail, rbdaddr;
- rbd_t rbd;
- do {
- status = ether1_inw (dev, priv->rx_head, rfd_t, rfd_status, NORMALIRQS);
- if ((status & RFD_COMPLETE) == 0)
- break;
- rbdaddr = ether1_inw (dev, priv->rx_head, rfd_t, rfd_rbdoffset, NORMALIRQS);
- ether1_readbuffer (dev, &rbd, rbdaddr, RBD_SIZE);
- if ((rbd.rbd_status & (RBD_EOF | RBD_ACNTVALID)) == (RBD_EOF | RBD_ACNTVALID)) {
- int length = rbd.rbd_status & RBD_ACNT;
- struct sk_buff *skb;
- length = (length + 1) & ~1;
- skb = dev_alloc_skb (length + 2);
- if (skb) {
- skb->dev = dev;
- skb_reserve (skb, 2);
- ether1_readbuffer (dev, skb_put (skb, length), rbd.rbd_bufl, length);
- skb->protocol = eth_type_trans (skb, dev);
- netif_rx (skb);
- priv->stats.rx_packets ++;
- } else
- priv->stats.rx_dropped ++;
- } else {
- printk(KERN_WARNING "%s: %sn", dev->name,
- (rbd.rbd_status & RBD_EOF) ? "oversized packet" : "acnt not valid");
- priv->stats.rx_dropped ++;
- }
- nexttail = ether1_inw (dev, priv->rx_tail, rfd_t, rfd_link, NORMALIRQS);
- /* nexttail should be rx_head */
- if (nexttail != priv->rx_head)
- printk(KERN_ERR "%s: receiver buffer chaining error (%04X != %04X)n",
- dev->name, nexttail, priv->rx_head);
- ether1_outw (dev, RFD_CMDEL | RFD_CMDSUSPEND, nexttail, rfd_t, rfd_command, NORMALIRQS);
- ether1_outw (dev, 0, priv->rx_tail, rfd_t, rfd_command, NORMALIRQS);
- ether1_outw (dev, 0, priv->rx_tail, rfd_t, rfd_status, NORMALIRQS);
- ether1_outw (dev, 0, priv->rx_tail, rfd_t, rfd_rbdoffset, NORMALIRQS);
-
- priv->rx_tail = nexttail;
- priv->rx_head = ether1_inw (dev, priv->rx_head, rfd_t, rfd_link, NORMALIRQS);
- } while (1);
- }
- static void
- ether1_interrupt (int irq, void *dev_id, struct pt_regs *regs)
- {
- struct net_device *dev = (struct net_device *)dev_id;
- struct ether1_priv *priv = (struct ether1_priv *)dev->priv;
- int status;
- status = ether1_inw (dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS);
- if (status) {
- ether1_outw(dev, status & (SCB_STRNR | SCB_STCNA | SCB_STFR | SCB_STCX),
- SCB_ADDR, scb_t, scb_command, NORMALIRQS);
- outb (CTRL_CA | CTRL_ACK, REG_CONTROL);
- if (status & SCB_STCX) {
- ether1_xmit_done (dev);
- }
- if (status & SCB_STCNA) {
- if (priv->resetting == 0)
- printk (KERN_WARNING "%s: CU went not ready ???n", dev->name);
- else
- priv->resetting += 1;
- if (ether1_inw (dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS)
- != (unsigned short)I82586_NULL) {
- ether1_outw (dev, SCB_CMDCUCSTART, SCB_ADDR, scb_t, scb_command, NORMALIRQS);
- outb (CTRL_CA, REG_CONTROL);
- }
- if (priv->resetting == 2)
- priv->resetting = 0;
- }
- if (status & SCB_STFR) {
- ether1_recv_done (dev);
- }
- if (status & SCB_STRNR) {
- if (ether1_inw (dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS) & SCB_STRXSUSP) {
- printk (KERN_WARNING "%s: RU went not ready: RU suspendedn", dev->name);
- ether1_outw (dev, SCB_CMDRXRESUME, SCB_ADDR, scb_t, scb_command, NORMALIRQS);
- outb (CTRL_CA, REG_CONTROL);
- priv->stats.rx_dropped ++; /* we suspended due to lack of buffer space */
- } else
- printk(KERN_WARNING "%s: RU went not ready: %04Xn", dev->name,
- ether1_inw (dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS));
- printk (KERN_WARNING "RU ptr = %04Xn", ether1_inw (dev, SCB_ADDR, scb_t, scb_rfa_offset,
- NORMALIRQS));
- }
- } else
- outb (CTRL_ACK, REG_CONTROL);
- }
- static int
- ether1_close (struct net_device *dev)
- {
- ether1_reset (dev);
- free_irq(dev->irq, dev);
- return 0;
- }
- static struct net_device_stats *
- ether1_getstats (struct net_device *dev)
- {
- struct ether1_priv *priv = (struct ether1_priv *)dev->priv;
- return &priv->stats;
- }
- /*
- * Set or clear the multicast filter for this adaptor.
- * num_addrs == -1 Promiscuous mode, receive all packets.
- * num_addrs == 0 Normal mode, clear multicast list.
- * num_addrs > 0 Multicast mode, receive normal and MC packets, and do
- * best-effort filtering.
- */
- static void
- ether1_setmulticastlist (struct net_device *dev)
- {
- }
- /* ------------------------------------------------------------------------- */
- static void __init ether1_banner(void)
- {
- static unsigned int version_printed = 0;
- if (net_debug && version_printed++ == 0)
- printk(KERN_INFO "%s", version);
- }
- static struct net_device * __init ether1_init_one(struct expansion_card *ec)
- {
- struct net_device *dev;
- struct ether1_priv *priv;
- int i;
- ether1_banner();
- ecard_claim(ec);
- dev = init_etherdev(NULL, sizeof(struct ether1_priv));
- if (!dev)
- goto out;
- SET_MODULE_OWNER(dev);
- dev->base_addr = ecard_address(ec, ECARD_IOC, ECARD_FAST);
- dev->irq = ec->irq;
- /*
- * these will not fail - the nature of the bus ensures this
- */
- request_region(dev->base_addr, 16, dev->name);
- request_region(dev->base_addr + 0x800, 4096, dev->name);
- priv = (struct ether1_priv *)dev->priv;
- if ((priv->bus_type = ether1_reset(dev)) == 0)
- goto release;
- printk(KERN_INFO "%s: ether1 in slot %d, ",
- dev->name, ec->slot_no);
-
- for (i = 0; i < 6; i++) {
- dev->dev_addr[i] = inb(IDPROM_ADDRESS + i);
- printk ("%2.2x%c", dev->dev_addr[i], i == 5 ? 'n' : ':');
- }
- if (ether1_init_2(dev))
- goto release;
- dev->open = ether1_open;
- dev->stop = ether1_close;
- dev->hard_start_xmit = ether1_sendpacket;
- dev->get_stats = ether1_getstats;
- dev->set_multicast_list = ether1_setmulticastlist;
- dev->tx_timeout = ether1_timeout;
- dev->watchdog_timeo = 5 * HZ / 100;
- return 0;
- release:
- release_region(dev->base_addr, 16);
- release_region(dev->base_addr + 0x800, 4096);
- unregister_netdev(dev);
- kfree(dev);
- out:
- ecard_release(ec);
- return dev;
- }
- static struct expansion_card *e_card[MAX_ECARDS];
- static struct net_device *e_dev[MAX_ECARDS];
- static int __init ether1_init(void)
- {
- int i, ret = -ENODEV;
- ecard_startfind();
- for (i = 0; i < MAX_ECARDS; i++) {
- struct expansion_card *ec;
- struct net_device *dev;
- ec = ecard_find(0, ether1_cids);
- if (!ec)
- break;
- dev = ether1_init_one(ec);
- if (!dev)
- break;
- e_card[i] = ec;
- e_dev[i] = dev;
- ret = 0;
- }
- return ret;
- }
- static void __exit ether1_exit(void)
- {
- int i;
- for (i = 0; i < MAX_ECARDS; i++) {
- if (e_dev[i]) {
- unregister_netdev(e_dev[i]);
- release_region(e_dev[i]->base_addr, 16);
- release_region(e_dev[i]->base_addr + 0x800, 4096);
- kfree(e_dev[i]);
- e_dev[i] = NULL;
- }
- if (e_card[i]) {
- ecard_release(e_card[i]);
- e_card[i] = NULL;
- }
- }
- }
- module_init(ether1_init);
- module_exit(ether1_exit);
- MODULE_LICENSE("GPL");