--- /dev/null
+/*
+ * 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/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/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 irqreturn_t ether1_interrupt(int irq, void *dev_id);
+static int ether1_close(struct net_device *dev);
+static void ether1_setmulticastlist(struct net_device *dev);
+static void ether1_timeout(struct net_device *dev);
+
+/* ------------------------------------------------------------------------- */
+
+static char version[] = "ether1 ethernet driver (c) 2000 Russell King v1.07\n";
+
+#define BUS_16 16
+#define BUS_8 8
+
+/* ------------------------------------------------------------------------- */
+
+#define DISABLEIRQS 1
+#define NORMALIRQS 0
+
+#define ether1_readw(dev, addr, type, offset, svflgs) ether1_inw_p (dev, addr + (int)(&((type *)0)->offset), svflgs)
+#define ether1_writew(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)
+ local_irq_save (flags);
+
+ writeb(addr >> 12, REG_PAGE);
+ ret = readw(ETHER1_RAM + ((addr & 4095) << 1));
+ if (svflgs)
+ local_irq_restore (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)
+ local_irq_save (flags);
+
+ writeb(addr >> 12, REG_PAGE);
+ writew(val, ETHER1_RAM + ((addr & 4095) << 1));
+ if (svflgs)
+ local_irq_restore (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;
+ void __iomem *addr;
+
+ offset = start & 4095;
+ page = start >> 12;
+ addr = ETHER1_RAM + (offset << 1);
+
+ if (offset + length > 4096)
+ thislen = 4096 - offset;
+ else
+ thislen = length;
+
+ do {
+ int used;
+
+ writeb(page, REG_PAGE);
+ length -= thislen;
+
+ __asm__ __volatile__(
+ "subs %3, %3, #2\n\
+ bmi 2f\n\
+1: ldr %0, [%1], #2\n\
+ mov %0, %0, lsl #16\n\
+ orr %0, %0, %0, lsr #16\n\
+ str %0, [%2], #4\n\
+ subs %3, %3, #2\n\
+ bmi 2f\n\
+ ldr %0, [%1], #2\n\
+ mov %0, %0, lsl #16\n\
+ orr %0, %0, %0, lsr #16\n\
+ str %0, [%2], #4\n\
+ subs %3, %3, #2\n\
+ bmi 2f\n\
+ ldr %0, [%1], #2\n\
+ mov %0, %0, lsl #16\n\
+ orr %0, %0, %0, lsr #16\n\
+ str %0, [%2], #4\n\
+ subs %3, %3, #2\n\
+ bmi 2f\n\
+ ldr %0, [%1], #2\n\
+ mov %0, %0, lsl #16\n\
+ orr %0, %0, %0, lsr #16\n\
+ str %0, [%2], #4\n\
+ subs %3, %3, #2\n\
+ bpl 1b\n\
+2: adds %3, %3, #1\n\
+ ldreqb %0, [%1]\n\
+ streqb %0, [%2]"
+ : "=&r" (used), "=&r" (data)
+ : "r" (addr), "r" (thislen), "1" (data));
+
+ addr = 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;
+ void __iomem *addr;
+
+ offset = start & 4095;
+ page = start >> 12;
+ addr = ETHER1_RAM + (offset << 1);
+
+ if (offset + length > 4096)
+ thislen = 4096 - offset;
+ else
+ thislen = length;
+
+ do {
+ int used;
+
+ writeb(page, REG_PAGE);
+ length -= thislen;
+
+ __asm__ __volatile__(
+ "subs %3, %3, #2\n\
+ bmi 2f\n\
+1: ldr %0, [%2], #4\n\
+ strb %0, [%1], #1\n\
+ mov %0, %0, lsr #8\n\
+ strb %0, [%1], #1\n\
+ subs %3, %3, #2\n\
+ bmi 2f\n\
+ ldr %0, [%2], #4\n\
+ strb %0, [%1], #1\n\
+ mov %0, %0, lsr #8\n\
+ strb %0, [%1], #1\n\
+ subs %3, %3, #2\n\
+ bmi 2f\n\
+ ldr %0, [%2], #4\n\
+ strb %0, [%1], #1\n\
+ mov %0, %0, lsr #8\n\
+ strb %0, [%1], #1\n\
+ subs %3, %3, #2\n\
+ bmi 2f\n\
+ ldr %0, [%2], #4\n\
+ strb %0, [%1], #1\n\
+ mov %0, %0, lsr #8\n\
+ strb %0, [%1], #1\n\
+ subs %3, %3, #2\n\
+ bpl 1b\n\
+2: adds %3, %3, #1\n\
+ ldreqb %0, [%2]\n\
+ streqb %0, [%1]"
+ : "=&r" (used), "=&r" (data)
+ : "r" (addr), "r" (thislen), "1" (data));
+
+ addr = ETHER1_RAM;
+
+ thislen = length;
+ if (thislen > 4096)
+ thislen = 4096;
+ page++;
+ } while (thislen);
+}
+
+static int
+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%04X\n", i - 1);
+ bad = -1;
+ }
+ }
+ }
+
+ if (bad != -1)
+ printk (" - 0x%04X\n", BUFFER_SIZE);
+ kfree (buffer);
+
+ return ret;
+}
+
+static int
+ether1_reset (struct net_device *dev)
+{
+ writeb(CTRL_RST|CTRL_ACK, REG_CONTROL);
+ return BUS_16;
+}
+
+static int
+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)
+{
+ int i, status, addr, next, next2;
+ int failures = 0;
+ unsigned long timeout;
+
+ writeb(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_readw(dev, CFG_ADDR, cfg_t, cfg_command, NORMALIRQS) != CMD_CONFIG) {
+ printk (KERN_ERR "%s: detected either RAM fault or compiler bug\n",
+ 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(dev)->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(dev)->tx_link = NOP_ADDR;
+ priv(dev)->tx_head = NOP_ADDR + NOP_SIZE;
+ priv(dev)->tx_tail = TDR_ADDR;
+ priv(dev)->rx_head = RX_AREA_START;
+
+ /* release reset & give 586 a prod */
+ priv(dev)->resetting = 1;
+ priv(dev)->initialising = 1;
+ writeb(CTRL_RST, REG_CONTROL);
+ writeb(0, REG_CONTROL);
+ writeb(CTRL_CA, REG_CONTROL);
+
+ /* 586 should now unset iscp.busy */
+ timeout = jiffies + HZ/2;
+ while (ether1_readw(dev, ISCP_ADDR, iscp_t, iscp_busy, DISABLEIRQS) == 1) {
+ if (time_after(jiffies, timeout)) {
+ printk (KERN_WARNING "%s: can't initialise 82586: iscp is busy\n", dev->name);
+ return 1;
+ }
+ }
+
+ /* check status of commands that we issued */
+ timeout += HZ/10;
+ while (((status = ether1_readw(dev, CFG_ADDR, cfg_t, cfg_status, DISABLEIRQS))
+ & STAT_COMPLETE) == 0) {
+ if (time_after(jiffies, timeout))
+ break;
+ }
+
+ if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
+ printk (KERN_WARNING "%s: can't initialise 82586: config status %04X\n", dev->name, status);
+ printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
+ ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
+ ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
+ ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
+ ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
+ failures += 1;
+ }
+
+ timeout += HZ/10;
+ while (((status = ether1_readw(dev, SA_ADDR, sa_t, sa_status, DISABLEIRQS))
+ & STAT_COMPLETE) == 0) {
+ if (time_after(jiffies, timeout))
+ break;
+ }
+
+ if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
+ printk (KERN_WARNING "%s: can't initialise 82586: set address status %04X\n", dev->name, status);
+ printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
+ ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
+ ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
+ ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
+ ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
+ failures += 1;
+ }
+
+ timeout += HZ/10;
+ while (((status = ether1_readw(dev, MC_ADDR, mc_t, mc_status, DISABLEIRQS))
+ & STAT_COMPLETE) == 0) {
+ if (time_after(jiffies, timeout))
+ break;
+ }
+
+ if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
+ printk (KERN_WARNING "%s: can't initialise 82586: set multicast status %04X\n", dev->name, status);
+ printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
+ ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
+ ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
+ ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
+ ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
+ failures += 1;
+ }
+
+ timeout += HZ;
+ while (((status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_status, DISABLEIRQS))
+ & STAT_COMPLETE) == 0) {
+ if (time_after(jiffies, timeout))
+ 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_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
+ ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
+ ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
+ ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
+ } else {
+ status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_result, DISABLEIRQS);
+ if (status & TDR_XCVRPROB)
+ printk (KERN_WARNING "%s: i/f failed tdr: transceiver problem\n", 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 away\n", 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 away\n", 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)
+{
+ int start, tail;
+
+ size = (size + 1) & ~1;
+ tail = priv(dev)->tx_tail;
+
+ if (priv(dev)->tx_head + size > TX_AREA_END) {
+ if (tail > priv(dev)->tx_head)
+ return -1;
+ start = TX_AREA_START;
+ if (start + size > tail)
+ return -1;
+ priv(dev)->tx_head = start + size;
+ } else {
+ if (priv(dev)->tx_head < tail && (priv(dev)->tx_head + size) > tail)
+ return -1;
+ start = priv(dev)->tx_head;
+ priv(dev)->tx_head += size;
+ }
+
+ return start;
+}
+
+static int
+ether1_open (struct net_device *dev)
+{
+ if (request_irq(dev->irq, ether1_interrupt, 0, "ether1", dev))
+ return -EAGAIN;
+
+ 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)
+{
+ printk(KERN_WARNING "%s: transmit timeout, network cable problem?\n",
+ dev->name);
+ printk(KERN_WARNING "%s: resetting device\n", dev->name);
+
+ ether1_reset (dev);
+
+ if (ether1_init_for_open (dev))
+ printk (KERN_ERR "%s: unable to restart interface\n", dev->name);
+
+ dev->stats.tx_errors++;
+ netif_wake_queue(dev);
+}
+
+static int
+ether1_sendpacket (struct sk_buff *skb, struct net_device *dev)
+{
+ int tmp, tst, nopaddr, txaddr, tbdaddr, dataddr;
+ unsigned long flags;
+ tx_t tx;
+ tbd_t tbd;
+ nop_t nop;
+
+ if (priv(dev)->restart) {
+ printk(KERN_WARNING "%s: resetting device\n", dev->name);
+
+ ether1_reset(dev);
+
+ if (ether1_init_for_open(dev))
+ printk(KERN_ERR "%s: unable to restart interface\n", dev->name);
+ else
+ priv(dev)->restart = 0;
+ }
+
+ if (skb->len < ETH_ZLEN) {
+ if (skb_padto(skb, ETH_ZLEN))
+ goto out;
+ }
+
+ /*
+ * insert packet followed by a nop
+ */
+ txaddr = ether1_txalloc (dev, TX_SIZE);
+ tbdaddr = ether1_txalloc (dev, TBD_SIZE);
+ dataddr = ether1_txalloc (dev, skb->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 | skb->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;
+
+ local_irq_save(flags);
+ ether1_writebuffer (dev, &tx, txaddr, TX_SIZE);
+ ether1_writebuffer (dev, &tbd, tbdaddr, TBD_SIZE);
+ ether1_writebuffer (dev, skb->data, dataddr, skb->len);
+ ether1_writebuffer (dev, &nop, nopaddr, NOP_SIZE);
+ tmp = priv(dev)->tx_link;
+ priv(dev)->tx_link = nopaddr;
+
+ /* now reset the previous nop pointer */
+ ether1_writew(dev, txaddr, tmp, nop_t, nop_link, NORMALIRQS);
+
+ local_irq_restore(flags);
+
+ /* handle transmit */
+
+ /* check to see if we have room for a full sized ether frame */
+ tmp = priv(dev)->tx_head;
+ tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN);
+ priv(dev)->tx_head = tmp;
+ dev_kfree_skb (skb);
+
+ if (tst == -1)
+ netif_stop_queue(dev);
+
+ out:
+ return NETDEV_TX_OK;
+}
+
+static void
+ether1_xmit_done (struct net_device *dev)
+{
+ nop_t nop;
+ int caddr, tst;
+
+ caddr = priv(dev)->tx_tail;
+
+again:
+ ether1_readbuffer (dev, &nop, caddr, NOP_SIZE);
+
+ switch (nop.nop_command & CMD_MASK) {
+ case CMD_TDR:
+ /* special case */
+ if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS)
+ != (unsigned short)I82586_NULL) {
+ ether1_writew(dev, SCB_CMDCUCSTART | SCB_CMDRXSTART, SCB_ADDR, scb_t,
+ scb_command, NORMALIRQS);
+ writeb(CTRL_CA, REG_CONTROL);
+ }
+ priv(dev)->tx_tail = NOP_ADDR;
+ return;
+
+ case CMD_NOP:
+ if (nop.nop_link == caddr) {
+ if (priv(dev)->initialising == 0)
+ printk (KERN_WARNING "%s: strange command complete with no tx command!\n", dev->name);
+ else
+ priv(dev)->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 command\n", dev->name);
+ priv(dev)->restart = 1;
+ return;
+
+ default:
+ printk (KERN_WARNING "%s: strange command %d complete! (offset %04X)", dev->name,
+ nop.nop_command & CMD_MASK, caddr);
+ priv(dev)->restart = 1;
+ return;
+ }
+
+ while (nop.nop_status & STAT_COMPLETE) {
+ if (nop.nop_status & STAT_OK) {
+ dev->stats.tx_packets++;
+ dev->stats.collisions += (nop.nop_status & STAT_COLLISIONS);
+ } else {
+ dev->stats.tx_errors++;
+
+ if (nop.nop_status & STAT_COLLAFTERTX)
+ dev->stats.collisions++;
+ if (nop.nop_status & STAT_NOCARRIER)
+ dev->stats.tx_carrier_errors++;
+ if (nop.nop_status & STAT_TXLOSTCTS)
+ printk (KERN_WARNING "%s: cts lost\n", dev->name);
+ if (nop.nop_status & STAT_TXSLOWDMA)
+ dev->stats.tx_fifo_errors++;
+ if (nop.nop_status & STAT_COLLEXCESSIVE)
+ dev->stats.collisions += 16;
+ }
+
+ if (nop.nop_link == caddr) {
+ printk (KERN_ERR "%s: tx buffer chaining error: tx command points to itself\n", 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 command\n", 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 nop\n", dev->name);
+ break;
+ }
+ }
+ priv(dev)->tx_tail = caddr;
+
+ caddr = priv(dev)->tx_head;
+ tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN);
+ priv(dev)->tx_head = caddr;
+ if (tst != -1)
+ netif_wake_queue(dev);
+}
+
+static void
+ether1_recv_done (struct net_device *dev)
+{
+ int status;
+ int nexttail, rbdaddr;
+ rbd_t rbd;
+
+ do {
+ status = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_status, NORMALIRQS);
+ if ((status & RFD_COMPLETE) == 0)
+ break;
+
+ rbdaddr = ether1_readw(dev, priv(dev)->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 = netdev_alloc_skb(dev, length + 2);
+
+ if (skb) {
+ 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);
+ dev->stats.rx_packets++;
+ } else
+ dev->stats.rx_dropped++;
+ } else {
+ printk(KERN_WARNING "%s: %s\n", dev->name,
+ (rbd.rbd_status & RBD_EOF) ? "oversized packet" : "acnt not valid");
+ dev->stats.rx_dropped++;
+ }
+
+ nexttail = ether1_readw(dev, priv(dev)->rx_tail, rfd_t, rfd_link, NORMALIRQS);
+ /* nexttail should be rx_head */
+ if (nexttail != priv(dev)->rx_head)
+ printk(KERN_ERR "%s: receiver buffer chaining error (%04X != %04X)\n",
+ dev->name, nexttail, priv(dev)->rx_head);
+ ether1_writew(dev, RFD_CMDEL | RFD_CMDSUSPEND, nexttail, rfd_t, rfd_command, NORMALIRQS);
+ ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_command, NORMALIRQS);
+ ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_status, NORMALIRQS);
+ ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_rbdoffset, NORMALIRQS);
+
+ priv(dev)->rx_tail = nexttail;
+ priv(dev)->rx_head = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_link, NORMALIRQS);
+ } while (1);
+}
+
+static irqreturn_t
+ether1_interrupt (int irq, void *dev_id)
+{
+ struct net_device *dev = (struct net_device *)dev_id;
+ int status;
+
+ status = ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS);
+
+ if (status) {
+ ether1_writew(dev, status & (SCB_STRNR | SCB_STCNA | SCB_STFR | SCB_STCX),
+ SCB_ADDR, scb_t, scb_command, NORMALIRQS);
+ writeb(CTRL_CA | CTRL_ACK, REG_CONTROL);
+ if (status & SCB_STCX) {
+ ether1_xmit_done (dev);
+ }
+ if (status & SCB_STCNA) {
+ if (priv(dev)->resetting == 0)
+ printk (KERN_WARNING "%s: CU went not ready ???\n", dev->name);
+ else
+ priv(dev)->resetting += 1;
+ if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS)
+ != (unsigned short)I82586_NULL) {
+ ether1_writew(dev, SCB_CMDCUCSTART, SCB_ADDR, scb_t, scb_command, NORMALIRQS);
+ writeb(CTRL_CA, REG_CONTROL);
+ }
+ if (priv(dev)->resetting == 2)
+ priv(dev)->resetting = 0;
+ }
+ if (status & SCB_STFR) {
+ ether1_recv_done (dev);
+ }
+ if (status & SCB_STRNR) {
+ if (ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS) & SCB_STRXSUSP) {
+ printk (KERN_WARNING "%s: RU went not ready: RU suspended\n", dev->name);
+ ether1_writew(dev, SCB_CMDRXRESUME, SCB_ADDR, scb_t, scb_command, NORMALIRQS);
+ writeb(CTRL_CA, REG_CONTROL);
+ dev->stats.rx_dropped++; /* we suspended due to lack of buffer space */
+ } else
+ printk(KERN_WARNING "%s: RU went not ready: %04X\n", dev->name,
+ ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS));
+ printk (KERN_WARNING "RU ptr = %04X\n", ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset,
+ NORMALIRQS));
+ }
+ } else
+ writeb(CTRL_ACK, REG_CONTROL);
+
+ return IRQ_HANDLED;
+}
+
+static int
+ether1_close (struct net_device *dev)
+{
+ ether1_reset (dev);
+
+ free_irq(dev->irq, dev);
+
+ return 0;
+}
+
+/*
+ * 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 ether1_banner(void)
+{
+ static unsigned int version_printed = 0;
+
+ if (net_debug && version_printed++ == 0)
+ printk(KERN_INFO "%s", version);
+}
+
+static const struct net_device_ops ether1_netdev_ops = {
+ .ndo_open = ether1_open,
+ .ndo_stop = ether1_close,
+ .ndo_start_xmit = ether1_sendpacket,
+ .ndo_set_rx_mode = ether1_setmulticastlist,
+ .ndo_tx_timeout = ether1_timeout,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_change_mtu = eth_change_mtu,
+ .ndo_set_mac_address = eth_mac_addr,
+};
+
+static int
+ether1_probe(struct expansion_card *ec, const struct ecard_id *id)
+{
+ struct net_device *dev;
+ int i, ret = 0;
+
+ ether1_banner();
+
+ ret = ecard_request_resources(ec);
+ if (ret)
+ goto out;
+
+ dev = alloc_etherdev(sizeof(struct ether1_priv));
+ if (!dev) {
+ ret = -ENOMEM;
+ goto release;
+ }
+
+ SET_NETDEV_DEV(dev, &ec->dev);
+
+ dev->irq = ec->irq;
+ priv(dev)->base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
+ if (!priv(dev)->base) {
+ ret = -ENOMEM;
+ goto free;
+ }
+
+ if ((priv(dev)->bus_type = ether1_reset(dev)) == 0) {
+ ret = -ENODEV;
+ goto free;
+ }
+
+ for (i = 0; i < 6; i++)
+ dev->dev_addr[i] = readb(IDPROM_ADDRESS + (i << 2));
+
+ if (ether1_init_2(dev)) {
+ ret = -ENODEV;
+ goto free;
+ }
+
+ dev->netdev_ops = ðer1_netdev_ops;
+ dev->watchdog_timeo = 5 * HZ / 100;
+
+ ret = register_netdev(dev);
+ if (ret)
+ goto free;
+
+ printk(KERN_INFO "%s: ether1 in slot %d, %pM\n",
+ dev->name, ec->slot_no, dev->dev_addr);
+
+ ecard_set_drvdata(ec, dev);
+ return 0;
+
+ free:
+ free_netdev(dev);
+ release:
+ ecard_release_resources(ec);
+ out:
+ return ret;
+}
+
+static void ether1_remove(struct expansion_card *ec)
+{
+ struct net_device *dev = ecard_get_drvdata(ec);
+
+ ecard_set_drvdata(ec, NULL);
+
+ unregister_netdev(dev);
+ free_netdev(dev);
+ ecard_release_resources(ec);
+}
+
+static const struct ecard_id ether1_ids[] = {
+ { MANU_ACORN, PROD_ACORN_ETHER1 },
+ { 0xffff, 0xffff }
+};
+
+static struct ecard_driver ether1_driver = {
+ .probe = ether1_probe,
+ .remove = ether1_remove,
+ .id_table = ether1_ids,
+ .drv = {
+ .name = "ether1",
+ },
+};
+
+static int __init ether1_init(void)
+{
+ return ecard_register_driver(ðer1_driver);
+}
+
+static void __exit ether1_exit(void)
+{
+ ecard_remove_driver(ðer1_driver);
+}
+
+module_init(ether1_init);
+module_exit(ether1_exit);
+
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff