1087 lines
27 KiB
C
1087 lines
27 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* linux/drivers/acorn/net/ether1.c
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*
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* Copyright (C) 1996-2000 Russell King
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*
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* Acorn ether1 driver (82586 chip) for Acorn machines
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*
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* We basically keep two queues in the cards memory - one for transmit
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* and one for receive. Each has a head and a tail. The head is where
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* we/the chip adds packets to be transmitted/received, and the tail
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* is where the transmitter has got to/where the receiver will stop.
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* Both of these queues are circular, and since the chip is running
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* all the time, we have to be careful when we modify the pointers etc
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* so that the buffer memory contents is valid all the time.
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*
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* Change log:
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* 1.00 RMK Released
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* 1.01 RMK 19/03/1996 Transfers the last odd byte onto/off of the card now.
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* 1.02 RMK 25/05/1997 Added code to restart RU if it goes not ready
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* 1.03 RMK 14/09/1997 Cleaned up the handling of a reset during the TX interrupt.
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* Should prevent lockup.
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* 1.04 RMK 17/09/1997 Added more info when initialisation of chip goes wrong.
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* TDR now only reports failure when chip reports non-zero
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* TDR time-distance.
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* 1.05 RMK 31/12/1997 Removed calls to dev_tint for 2.1
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* 1.06 RMK 10/02/2000 Updated for 2.3.43
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* 1.07 RMK 13/05/2000 Updated for 2.3.99-pre8
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/fcntl.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/in.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/device.h>
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#include <linux/init.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/bitops.h>
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#include <asm/io.h>
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#include <asm/dma.h>
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#include <asm/ecard.h>
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#define __ETHER1_C
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#include "ether1.h"
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static unsigned int net_debug = NET_DEBUG;
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#define BUFFER_SIZE 0x10000
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#define TX_AREA_START 0x00100
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#define TX_AREA_END 0x05000
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#define RX_AREA_START 0x05000
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#define RX_AREA_END 0x0fc00
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static int ether1_open(struct net_device *dev);
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static netdev_tx_t ether1_sendpacket(struct sk_buff *skb,
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struct net_device *dev);
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static irqreturn_t ether1_interrupt(int irq, void *dev_id);
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static int ether1_close(struct net_device *dev);
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static void ether1_setmulticastlist(struct net_device *dev);
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static void ether1_timeout(struct net_device *dev, unsigned int txqueue);
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/* ------------------------------------------------------------------------- */
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static char version[] = "ether1 ethernet driver (c) 2000 Russell King v1.07\n";
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#define BUS_16 16
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#define BUS_8 8
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/* ------------------------------------------------------------------------- */
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#define DISABLEIRQS 1
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#define NORMALIRQS 0
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#define ether1_readw(dev, addr, type, offset, svflgs) ether1_inw_p (dev, addr + (int)(&((type *)0)->offset), svflgs)
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#define ether1_writew(dev, val, addr, type, offset, svflgs) ether1_outw_p (dev, val, addr + (int)(&((type *)0)->offset), svflgs)
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static inline unsigned short
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ether1_inw_p (struct net_device *dev, int addr, int svflgs)
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{
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unsigned long flags;
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unsigned short ret;
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if (svflgs)
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local_irq_save (flags);
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writeb(addr >> 12, REG_PAGE);
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ret = readw(ETHER1_RAM + ((addr & 4095) << 1));
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if (svflgs)
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local_irq_restore (flags);
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return ret;
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}
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static inline void
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ether1_outw_p (struct net_device *dev, unsigned short val, int addr, int svflgs)
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{
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unsigned long flags;
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if (svflgs)
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local_irq_save (flags);
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writeb(addr >> 12, REG_PAGE);
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writew(val, ETHER1_RAM + ((addr & 4095) << 1));
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if (svflgs)
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local_irq_restore (flags);
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}
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/*
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* Some inline assembler to allow fast transfers on to/off of the card.
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* Since this driver depends on some features presented by the ARM
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* specific architecture, and that you can't configure this driver
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* without specifying ARM mode, this is not a problem.
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*
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* This routine is essentially an optimised memcpy from the card's
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* onboard RAM to kernel memory.
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*/
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static void
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ether1_writebuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length)
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{
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unsigned int page, thislen, offset;
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void __iomem *addr;
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offset = start & 4095;
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page = start >> 12;
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addr = ETHER1_RAM + (offset << 1);
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if (offset + length > 4096)
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thislen = 4096 - offset;
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else
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thislen = length;
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do {
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int used;
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writeb(page, REG_PAGE);
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length -= thislen;
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__asm__ __volatile__(
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"subs %3, %3, #2\n\
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bmi 2f\n\
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1: ldr %0, [%1], #2\n\
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mov %0, %0, lsl #16\n\
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orr %0, %0, %0, lsr #16\n\
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str %0, [%2], #4\n\
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subs %3, %3, #2\n\
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bmi 2f\n\
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ldr %0, [%1], #2\n\
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mov %0, %0, lsl #16\n\
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orr %0, %0, %0, lsr #16\n\
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str %0, [%2], #4\n\
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subs %3, %3, #2\n\
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bmi 2f\n\
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ldr %0, [%1], #2\n\
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mov %0, %0, lsl #16\n\
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orr %0, %0, %0, lsr #16\n\
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str %0, [%2], #4\n\
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subs %3, %3, #2\n\
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bmi 2f\n\
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ldr %0, [%1], #2\n\
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mov %0, %0, lsl #16\n\
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orr %0, %0, %0, lsr #16\n\
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str %0, [%2], #4\n\
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subs %3, %3, #2\n\
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bpl 1b\n\
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2: adds %3, %3, #1\n\
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ldreqb %0, [%1]\n\
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streqb %0, [%2]"
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: "=&r" (used), "=&r" (data)
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: "r" (addr), "r" (thislen), "1" (data));
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addr = ETHER1_RAM;
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thislen = length;
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if (thislen > 4096)
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thislen = 4096;
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page++;
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} while (thislen);
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}
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static void
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ether1_readbuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length)
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{
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unsigned int page, thislen, offset;
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void __iomem *addr;
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offset = start & 4095;
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page = start >> 12;
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addr = ETHER1_RAM + (offset << 1);
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if (offset + length > 4096)
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thislen = 4096 - offset;
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else
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thislen = length;
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do {
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int used;
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writeb(page, REG_PAGE);
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length -= thislen;
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__asm__ __volatile__(
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"subs %3, %3, #2\n\
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bmi 2f\n\
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1: ldr %0, [%2], #4\n\
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strb %0, [%1], #1\n\
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mov %0, %0, lsr #8\n\
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strb %0, [%1], #1\n\
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subs %3, %3, #2\n\
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bmi 2f\n\
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ldr %0, [%2], #4\n\
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strb %0, [%1], #1\n\
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mov %0, %0, lsr #8\n\
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strb %0, [%1], #1\n\
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subs %3, %3, #2\n\
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bmi 2f\n\
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ldr %0, [%2], #4\n\
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strb %0, [%1], #1\n\
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mov %0, %0, lsr #8\n\
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strb %0, [%1], #1\n\
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subs %3, %3, #2\n\
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bmi 2f\n\
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ldr %0, [%2], #4\n\
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strb %0, [%1], #1\n\
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mov %0, %0, lsr #8\n\
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strb %0, [%1], #1\n\
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subs %3, %3, #2\n\
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bpl 1b\n\
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2: adds %3, %3, #1\n\
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ldreqb %0, [%2]\n\
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streqb %0, [%1]"
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: "=&r" (used), "=&r" (data)
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: "r" (addr), "r" (thislen), "1" (data));
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addr = ETHER1_RAM;
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thislen = length;
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if (thislen > 4096)
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thislen = 4096;
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page++;
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} while (thislen);
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}
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static int
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ether1_ramtest(struct net_device *dev, unsigned char byte)
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{
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unsigned char *buffer = kmalloc (BUFFER_SIZE, GFP_KERNEL);
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int i, ret = BUFFER_SIZE;
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int max_errors = 15;
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int bad = -1;
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int bad_start = 0;
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if (!buffer)
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return 1;
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memset (buffer, byte, BUFFER_SIZE);
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ether1_writebuffer (dev, buffer, 0, BUFFER_SIZE);
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memset (buffer, byte ^ 0xff, BUFFER_SIZE);
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ether1_readbuffer (dev, buffer, 0, BUFFER_SIZE);
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for (i = 0; i < BUFFER_SIZE; i++) {
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if (buffer[i] != byte) {
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if (max_errors >= 0 && bad != buffer[i]) {
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if (bad != -1)
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printk ("\n");
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printk (KERN_CRIT "%s: RAM failed with (%02X instead of %02X) at 0x%04X",
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dev->name, buffer[i], byte, i);
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ret = -ENODEV;
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max_errors --;
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bad = buffer[i];
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bad_start = i;
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}
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} else {
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if (bad != -1) {
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if (bad_start == i - 1)
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printk ("\n");
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else
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printk (" - 0x%04X\n", i - 1);
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bad = -1;
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}
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}
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}
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if (bad != -1)
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printk (" - 0x%04X\n", BUFFER_SIZE);
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kfree (buffer);
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return ret;
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}
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static int
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ether1_reset (struct net_device *dev)
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{
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writeb(CTRL_RST|CTRL_ACK, REG_CONTROL);
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return BUS_16;
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}
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static int
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ether1_init_2(struct net_device *dev)
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{
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int i;
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dev->mem_start = 0;
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i = ether1_ramtest (dev, 0x5a);
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if (i > 0)
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i = ether1_ramtest (dev, 0x1e);
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if (i <= 0)
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return -ENODEV;
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dev->mem_end = i;
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return 0;
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}
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/*
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* These are the structures that are loaded into the ether RAM card to
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* initialise the 82586
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*/
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/* at 0x0100 */
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#define NOP_ADDR (TX_AREA_START)
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#define NOP_SIZE (0x06)
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static nop_t init_nop = {
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0,
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CMD_NOP,
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NOP_ADDR
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};
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/* at 0x003a */
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#define TDR_ADDR (0x003a)
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#define TDR_SIZE (0x08)
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static tdr_t init_tdr = {
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0,
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CMD_TDR | CMD_INTR,
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NOP_ADDR,
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0
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};
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/* at 0x002e */
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#define MC_ADDR (0x002e)
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#define MC_SIZE (0x0c)
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static mc_t init_mc = {
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0,
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CMD_SETMULTICAST,
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TDR_ADDR,
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0,
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{ { 0, } }
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};
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/* at 0x0022 */
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#define SA_ADDR (0x0022)
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#define SA_SIZE (0x0c)
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static sa_t init_sa = {
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0,
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CMD_SETADDRESS,
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MC_ADDR,
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{ 0, }
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};
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/* at 0x0010 */
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#define CFG_ADDR (0x0010)
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#define CFG_SIZE (0x12)
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static cfg_t init_cfg = {
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0,
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CMD_CONFIG,
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SA_ADDR,
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8,
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8,
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CFG8_SRDY,
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CFG9_PREAMB8 | CFG9_ADDRLENBUF | CFG9_ADDRLEN(6),
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0,
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0x60,
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0,
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CFG13_RETRY(15) | CFG13_SLOTH(2),
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0,
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};
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/* at 0x0000 */
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#define SCB_ADDR (0x0000)
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#define SCB_SIZE (0x10)
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static scb_t init_scb = {
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0,
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SCB_CMDACKRNR | SCB_CMDACKCNA | SCB_CMDACKFR | SCB_CMDACKCX,
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CFG_ADDR,
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RX_AREA_START,
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0,
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0,
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0,
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0
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};
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/* at 0xffee */
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#define ISCP_ADDR (0xffee)
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#define ISCP_SIZE (0x08)
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static iscp_t init_iscp = {
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1,
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SCB_ADDR,
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0x0000,
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0x0000
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};
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/* at 0xfff6 */
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#define SCP_ADDR (0xfff6)
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#define SCP_SIZE (0x0a)
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static scp_t init_scp = {
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SCP_SY_16BBUS,
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{ 0, 0 },
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ISCP_ADDR,
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0
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};
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#define RFD_SIZE (0x16)
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static rfd_t init_rfd = {
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0,
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0,
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0,
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0,
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{ 0, },
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{ 0, },
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0
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};
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#define RBD_SIZE (0x0a)
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static rbd_t init_rbd = {
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0,
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0,
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0,
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0,
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ETH_FRAME_LEN + 8
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};
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#define TX_SIZE (0x08)
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#define TBD_SIZE (0x08)
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static int
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ether1_init_for_open (struct net_device *dev)
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{
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int i, status, addr, next, next2;
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int failures = 0;
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unsigned long timeout;
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writeb(CTRL_RST|CTRL_ACK, REG_CONTROL);
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for (i = 0; i < 6; i++)
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init_sa.sa_addr[i] = dev->dev_addr[i];
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/* load data structures into ether1 RAM */
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ether1_writebuffer (dev, &init_scp, SCP_ADDR, SCP_SIZE);
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ether1_writebuffer (dev, &init_iscp, ISCP_ADDR, ISCP_SIZE);
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ether1_writebuffer (dev, &init_scb, SCB_ADDR, SCB_SIZE);
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ether1_writebuffer (dev, &init_cfg, CFG_ADDR, CFG_SIZE);
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ether1_writebuffer (dev, &init_sa, SA_ADDR, SA_SIZE);
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ether1_writebuffer (dev, &init_mc, MC_ADDR, MC_SIZE);
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ether1_writebuffer (dev, &init_tdr, TDR_ADDR, TDR_SIZE);
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ether1_writebuffer (dev, &init_nop, NOP_ADDR, NOP_SIZE);
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if (ether1_readw(dev, CFG_ADDR, cfg_t, cfg_command, NORMALIRQS) != CMD_CONFIG) {
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printk (KERN_ERR "%s: detected either RAM fault or compiler bug\n",
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dev->name);
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return 1;
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}
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/*
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* setup circularly linked list of { rfd, rbd, buffer }, with
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* all rfds circularly linked, rbds circularly linked.
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* First rfd is linked to scp, first rbd is linked to first
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* rfd. Last rbd has a suspend command.
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*/
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addr = RX_AREA_START;
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do {
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next = addr + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10;
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next2 = next + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10;
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if (next2 >= RX_AREA_END) {
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next = RX_AREA_START;
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init_rfd.rfd_command = RFD_CMDEL | RFD_CMDSUSPEND;
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priv(dev)->rx_tail = addr;
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} else
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init_rfd.rfd_command = 0;
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if (addr == RX_AREA_START)
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init_rfd.rfd_rbdoffset = addr + RFD_SIZE;
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else
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init_rfd.rfd_rbdoffset = 0;
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init_rfd.rfd_link = next;
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init_rbd.rbd_link = next + RFD_SIZE;
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init_rbd.rbd_bufl = addr + RFD_SIZE + RBD_SIZE;
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ether1_writebuffer (dev, &init_rfd, addr, RFD_SIZE);
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ether1_writebuffer (dev, &init_rbd, addr + RFD_SIZE, RBD_SIZE);
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addr = next;
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} while (next2 < RX_AREA_END);
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priv(dev)->tx_link = NOP_ADDR;
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priv(dev)->tx_head = NOP_ADDR + NOP_SIZE;
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priv(dev)->tx_tail = TDR_ADDR;
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priv(dev)->rx_head = RX_AREA_START;
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/* release reset & give 586 a prod */
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priv(dev)->resetting = 1;
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priv(dev)->initialising = 1;
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writeb(CTRL_RST, REG_CONTROL);
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writeb(0, REG_CONTROL);
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|
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, unsigned int txqueue)
|
|
{
|
|
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 netdev_tx_t
|
|
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_set_mac_address = eth_mac_addr,
|
|
};
|
|
|
|
static int
|
|
ether1_probe(struct expansion_card *ec, const struct ecard_id *id)
|
|
{
|
|
struct net_device *dev;
|
|
u8 addr[ETH_ALEN];
|
|
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++)
|
|
addr[i] = readb(IDPROM_ADDRESS + (i << 2));
|
|
eth_hw_addr_set(dev, addr);
|
|
|
|
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");
|