diff options
Diffstat (limited to 'drivers/net/arm/ether1.c')
| -rw-r--r-- | drivers/net/arm/ether1.c | 1094 |
1 files changed, 0 insertions, 1094 deletions
diff --git a/drivers/net/arm/ether1.c b/drivers/net/arm/ether1.c deleted file mode 100644 index b00781c02d5d..000000000000 --- a/drivers/net/arm/ether1.c +++ /dev/null @@ -1,1094 +0,0 @@ -/* - * 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/system.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[] __devinitdata = "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 __devinit -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 __devinit -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 (!is_valid_ether_addr(dev->dev_addr)) { - printk(KERN_WARNING "%s: invalid ethernet MAC address\n", - dev->name); - return -EINVAL; - } - - 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 = dev_alloc_skb (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 __devinit 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_multicast_list = 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 __devinit -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 __devexit 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 = __devexit_p(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"); |