/* * linux/drivers/acorn/net/ether1.c * * Copyright (C) 1996-2000 Russell King * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * Acorn ether1 driver (82586 chip) for Acorn machines * * We basically keep two queues in the cards memory - one for transmit * and one for receive. Each has a head and a tail. The head is where * we/the chip adds packets to be transmitted/received, and the tail * is where the transmitter has got to/where the receiver will stop. * Both of these queues are circular, and since the chip is running * all the time, we have to be careful when we modify the pointers etc * so that the buffer memory contents is valid all the time. * * Change log: * 1.00 RMK Released * 1.01 RMK 19/03/1996 Transfers the last odd byte onto/off of the card now. * 1.02 RMK 25/05/1997 Added code to restart RU if it goes not ready * 1.03 RMK 14/09/1997 Cleaned up the handling of a reset during the TX interrupt. * Should prevent lockup. * 1.04 RMK 17/09/1997 Added more info when initialsation of chip goes wrong. * TDR now only reports failure when chip reports non-zero * TDR time-distance. * 1.05 RMK 31/12/1997 Removed calls to dev_tint for 2.1 * 1.06 RMK 10/02/2000 Updated for 2.3.43 * 1.07 RMK 13/05/2000 Updated for 2.3.99-pre8 */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/types.h> #include <linux/fcntl.h> #include <linux/interrupt.h> #include <linux/ptrace.h> #include <linux/ioport.h> #include <linux/in.h> #include <linux/slab.h> #include <linux/string.h> #include <linux/errno.h> #include <linux/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, struct pt_regs *regs); static int ether1_close(struct net_device *dev); static struct net_device_stats *ether1_getstats(struct net_device *dev); static void ether1_setmulticastlist(struct net_device *dev); static void ether1_timeout(struct net_device *dev); /* ------------------------------------------------------------------------- */ static char version[] __initdata = "ether1 ethernet driver (c) 2000 Russell King v1.07\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 __init ether1_ramtest(struct net_device *dev, unsigned char byte) { unsigned char *buffer = kmalloc (BUFFER_SIZE, GFP_KERNEL); int i, ret = BUFFER_SIZE; int max_errors = 15; int bad = -1; int bad_start = 0; if (!buffer) return 1; memset (buffer, byte, BUFFER_SIZE); ether1_writebuffer (dev, buffer, 0, BUFFER_SIZE); memset (buffer, byte ^ 0xff, BUFFER_SIZE); ether1_readbuffer (dev, buffer, 0, BUFFER_SIZE); for (i = 0; i < BUFFER_SIZE; i++) { if (buffer[i] != byte) { if (max_errors >= 0 && bad != buffer[i]) { if (bad != -1) printk ("\n"); printk (KERN_CRIT "%s: RAM failed with (%02X instead of %02X) at 0x%04X", dev->name, buffer[i], byte, i); ret = -ENODEV; max_errors --; bad = buffer[i]; bad_start = i; } } else { if (bad != -1) { if (bad_start == i - 1) printk ("\n"); else printk (" - 0x%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 __init ether1_init_2(struct net_device *dev) { int i; dev->mem_start = 0; i = ether1_ramtest (dev, 0x5a); if (i > 0) i = ether1_ramtest (dev, 0x1e); if (i <= 0) return -ENODEV; dev->mem_end = i; return 0; } /* * These are the structures that are loaded into the ether RAM card to * initialise the 82586 */ /* at 0x0100 */ #define NOP_ADDR (TX_AREA_START) #define NOP_SIZE (0x06) static nop_t init_nop = { 0, CMD_NOP, NOP_ADDR }; /* at 0x003a */ #define TDR_ADDR (0x003a) #define TDR_SIZE (0x08) static tdr_t init_tdr = { 0, CMD_TDR | CMD_INTR, NOP_ADDR, 0 }; /* at 0x002e */ #define MC_ADDR (0x002e) #define MC_SIZE (0x0c) static mc_t init_mc = { 0, CMD_SETMULTICAST, TDR_ADDR, 0, { { 0, } } }; /* at 0x0022 */ #define SA_ADDR (0x0022) #define SA_SIZE (0x0c) static sa_t init_sa = { 0, CMD_SETADDRESS, MC_ADDR, { 0, } }; /* at 0x0010 */ #define CFG_ADDR (0x0010) #define CFG_SIZE (0x12) static cfg_t init_cfg = { 0, CMD_CONFIG, SA_ADDR, 8, 8, CFG8_SRDY, CFG9_PREAMB8 | CFG9_ADDRLENBUF | CFG9_ADDRLEN(6), 0, 0x60, 0, CFG13_RETRY(15) | CFG13_SLOTH(2), 0, }; /* at 0x0000 */ #define SCB_ADDR (0x0000) #define SCB_SIZE (0x10) static scb_t init_scb = { 0, SCB_CMDACKRNR | SCB_CMDACKCNA | SCB_CMDACKFR | SCB_CMDACKCX, CFG_ADDR, RX_AREA_START, 0, 0, 0, 0 }; /* at 0xffee */ #define ISCP_ADDR (0xffee) #define ISCP_SIZE (0x08) static iscp_t init_iscp = { 1, SCB_ADDR, 0x0000, 0x0000 }; /* at 0xfff6 */ #define SCP_ADDR (0xfff6) #define SCP_SIZE (0x0a) static scp_t init_scp = { SCP_SY_16BBUS, { 0, 0 }, ISCP_ADDR, 0 }; #define RFD_SIZE (0x16) static rfd_t init_rfd = { 0, 0, 0, 0, { 0, }, { 0, }, 0 }; #define RBD_SIZE (0x0a) static rbd_t init_rbd = { 0, 0, 0, 0, ETH_FRAME_LEN + 8 }; #define TX_SIZE (0x08) #define TBD_SIZE (0x08) static int ether1_init_for_open (struct net_device *dev) { 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; memset (&priv(dev)->stats, 0, sizeof (struct net_device_stats)); if (ether1_init_for_open (dev)) { free_irq (dev->irq, dev); return -EAGAIN; } netif_start_queue(dev); return 0; } static void ether1_timeout(struct net_device *dev) { 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); priv(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) { skb = skb_padto(skb, ETH_ZLEN); if (skb == NULL) 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 */ dev->trans_start = jiffies; /* 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 0; } 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_outw(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) { priv(dev)->stats.tx_packets ++; priv(dev)->stats.collisions += (nop.nop_status & STAT_COLLISIONS); } else { priv(dev)->stats.tx_errors ++; if (nop.nop_status & STAT_COLLAFTERTX) priv(dev)->stats.collisions ++; if (nop.nop_status & STAT_NOCARRIER) priv(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) priv(dev)->stats.tx_fifo_errors ++; if (nop.nop_status & STAT_COLLEXCESSIVE) priv(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->dev = dev; skb_reserve (skb, 2); ether1_readbuffer (dev, skb_put (skb, length), rbd.rbd_bufl, length); skb->protocol = eth_type_trans (skb, dev); netif_rx (skb); priv(dev)->stats.rx_packets ++; } else priv(dev)->stats.rx_dropped ++; } else { printk(KERN_WARNING "%s: %s\n", dev->name, (rbd.rbd_status & RBD_EOF) ? "oversized packet" : "acnt not valid"); priv(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 pt_regs *regs) { 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_outw(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); priv(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; } static struct net_device_stats * ether1_getstats (struct net_device *dev) { return &priv(dev)->stats; } /* * Set or clear the multicast filter for this adaptor. * num_addrs == -1 Promiscuous mode, receive all packets. * num_addrs == 0 Normal mode, clear multicast list. * num_addrs > 0 Multicast mode, receive normal and MC packets, and do * best-effort filtering. */ static void ether1_setmulticastlist (struct net_device *dev) { } /* ------------------------------------------------------------------------- */ static void __init ether1_banner(void) { static unsigned int version_printed = 0; if (net_debug && version_printed++ == 0) printk(KERN_INFO "%s", version); } static 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_MODULE_OWNER(dev); SET_NETDEV_DEV(dev, &ec->dev); dev->irq = ec->irq; priv(dev)->base = ioremap(ecard_resource_start(ec, ECARD_RES_IOCFAST), ecard_resource_len(ec, ECARD_RES_IOCFAST)); 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->open = ether1_open; dev->stop = ether1_close; dev->hard_start_xmit = ether1_sendpacket; dev->get_stats = ether1_getstats; dev->set_multicast_list = ether1_setmulticastlist; dev->tx_timeout = ether1_timeout; dev->watchdog_timeo = 5 * HZ / 100; ret = register_netdev(dev); if (ret) goto free; printk(KERN_INFO "%s: ether1 in slot %d, ", dev->name, ec->slot_no); for (i = 0; i < 6; i++) printk ("%2.2x%c", dev->dev_addr[i], i == 5 ? '\n' : ':'); ecard_set_drvdata(ec, dev); return 0; free: if (priv(dev)->base) iounmap(priv(dev)->base); 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); iounmap(priv(dev)->base); 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");