From c7fc24dc4420057f103afe8fc64524ebc25c5d37 Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Tue, 25 Aug 1998 09:12:35 +0000 Subject: o Merge with Linux 2.1.116. o New Newport console code. o New G364 console code. --- drivers/net/82596.c | 1356 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1356 insertions(+) create mode 100644 drivers/net/82596.c (limited to 'drivers/net/82596.c') diff --git a/drivers/net/82596.c b/drivers/net/82596.c new file mode 100644 index 000000000..43db9bc8d --- /dev/null +++ b/drivers/net/82596.c @@ -0,0 +1,1356 @@ +/* 82596.c: A generic 82596 ethernet driver for linux. */ +/* + Based on Apricot.c + Written 1994 by Mark Evans. + This driver is for the Apricot 82596 bus-master interface + + Modularised 12/94 Mark Evans + + + Modified to support the 82596 ethernet chips on 680x0 VME boards. + by Richard Hirst + Renamed to be 82596.c + + *** Untested on Apricot hardware, and may require some hacking + *** to make it work. The old 82596.c reported hasn't worked + *** since 1.3.xx anyway. I have been unable to find any users + *** of Apricot hardware to test this on. + + Most of my modifications relate to the braindead big-endian + implementation by Intel. When the i596 is operating in + 'big-endian' mode, it thinks a 32 bit value of 0x12345678 + should be stored as 0x56781234. This is a real pain, when + you have linked lists which are shared by the 680x0 and the + i596. + + Driver skeleton + Written 1993 by Donald Becker. + Copyright 1993 United States Government as represented by the Director, + National Security Agency. This software may only be used and distributed + according to the terms of the GNU Public License as modified by SRC, + incorporated herein by reference. + + The author may be reached as becker@super.org or + C/O Supercomputing Research Ctr., 17100 Science Dr., Bowie MD 20715 + + */ + +static const char *version = "82596.c:v1.0 15/07/98\n"; + +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include /*?? */ + +#ifdef CONFIG_MVME16x_NET +#include +#endif +#ifdef CONFIG_BVME6000_NET +#include +#endif + +/* + * Define various macros for Channel Attention, word swapping etc., dependant + * on architecture. MVME and BVME are 680x0 based, otherwise it is Intel. + */ + +#ifdef __mc68000__ +#define WSWAPrfd(x) ((struct i596_rfd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) +#define WSWAPrbd(x) ((struct i596_rbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) +#define WSWAPiscp(x) ((struct i596_iscp *)(((u32)(x)<<16) | ((((u32)(x)))>>16))) +#define WSWAPscb(x) ((struct i596_scb *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) +#define WSWAPcmd(x) ((struct i596_cmd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) +#define WSWAPtbd(x) ((struct i596_tbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) +#define WSWAPchar(x) ((char *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) +#define ISCP_BUSY 0x00010000 +#define MACH_IS_APRICOT 0 +#else +#define WSWAPrfd(x) x +#define WSWAPiscp(x) ((struct i596_iscp *)(x)) +#define WSWAPscb(x) ((struct i596_scb *)(x)) +#define WSWAPcmd(x) x +#define WSWAPtbd(x) x +#define WSWAPchar(x) x +#define ISCP_BUSY 0x0001 +#define MACH_IS_APRICOT 1 +#endif + +/* + * The MPU_PORT command allows direct access to the 82596. With PORT access + * the following commands are available (p5-18). The 32-bit port command + * must be word-swapped with the most significant word written first. + * This only applies to VME boards. + */ +#define PORT_RESET 0x00 /* reset 82596 */ +#define PORT_SELFTEST 0x01 /* selftest */ +#define PORT_ALTSCP 0x02 /* alternate SCB address */ +#define PORT_ALTDUMP 0x03 /* Alternate DUMP address */ + +#ifndef HAVE_PORTRESERVE +#define check_region(addr, size) 0 +#define request_region(addr, size,name) do ; while(0) +#endif + +#ifndef HAVE_ALLOC_SKB +#define alloc_skb(size, priority) (struct sk_buff *) kmalloc(size,priority) +#define kfree_skbmem(buff, size) kfree_s(buff,size) +#endif + +#define APRICOT_DEBUG 2 + +#ifdef APRICOT_DEBUG +int i596_debug = APRICOT_DEBUG; +#else +int i596_debug = 1; +#endif + +#define I596_TOTAL_SIZE 17 + +#define I596_NULL -1 + +#define CMD_EOL 0x8000 /* The last command of the list, stop. */ +#define CMD_SUSP 0x4000 /* Suspend after doing cmd. */ +#define CMD_INTR 0x2000 /* Interrupt after doing cmd. */ + +#define CMD_FLEX 0x0008 /* Enable flexible memory model */ + +enum commands { + CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3, + CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7 +}; + +#define STAT_C 0x8000 /* Set to 0 after execution */ +#define STAT_B 0x4000 /* Command being executed */ +#define STAT_OK 0x2000 /* Command executed ok */ +#define STAT_A 0x1000 /* Command aborted */ + +#define CUC_START 0x0100 +#define CUC_RESUME 0x0200 +#define CUC_SUSPEND 0x0300 +#define CUC_ABORT 0x0400 +#define RX_START 0x0010 +#define RX_RESUME 0x0020 +#define RX_SUSPEND 0x0030 +#define RX_ABORT 0x0040 + +struct i596_reg { + unsigned short porthi; + unsigned short portlo; + unsigned long ca; +}; + +struct i596_cmd { + unsigned short status; + unsigned short command; + struct i596_cmd *next; +}; + +#define EOF 0x8000 +#define SIZE_MASK 0x3fff + +struct i596_tbd { + unsigned short size; + unsigned short pad; + struct i596_tbd *next; + char *data; +}; + +struct tx_cmd { + struct i596_cmd cmd; + struct i596_tbd *tbd; + unsigned short size; + unsigned short pad; + struct sk_buff *skb; /* So we can free it after tx */ +}; + +struct i596_rfd { + unsigned short stat; + unsigned short cmd; + struct i596_rfd *next; + long rbd; + unsigned short count; + unsigned short size; + char data[1532]; +}; + +#define RX_RING_SIZE 16 + +struct i596_scb { + unsigned short status; + unsigned short command; + struct i596_cmd *cmd; + struct i596_rfd *rfd; + unsigned long crc_err; + unsigned long align_err; + unsigned long resource_err; + unsigned long over_err; + unsigned long rcvdt_err; + unsigned long short_err; + unsigned short t_on; + unsigned short t_off; +}; + +struct i596_iscp { + unsigned long stat; + struct i596_scb *scb; +}; + +struct i596_scp { + unsigned long sysbus; + unsigned long pad; + struct i596_iscp *iscp; +}; + +struct i596_private { + volatile struct i596_scp scp; + volatile struct i596_iscp iscp; + volatile struct i596_scb scb; + struct i596_cmd set_add; + char eth_addr[8]; + struct i596_cmd set_conf; + char i596_config[16]; + struct i596_cmd tdr; + unsigned long stat; + int last_restart __attribute__((aligned(4))); + struct i596_rfd *rx_tail; + struct i596_cmd *cmd_tail; + struct i596_cmd *cmd_head; + int cmd_backlog; + unsigned long last_cmd; + struct net_device_stats stats; +}; + +char init_setup[] = +{ + 0x8E, /* length, prefetch on */ + 0xC8, /* fifo to 8, monitor off */ +#ifdef CONFIG_VME + 0xc0, /* don't save bad frames */ +#else + 0x80, /* don't save bad frames */ +#endif + 0x2E, /* No source address insertion, 8 byte preamble */ + 0x00, /* priority and backoff defaults */ + 0x60, /* interframe spacing */ + 0x00, /* slot time LSB */ + 0xf2, /* slot time and retries */ + 0x00, /* promiscuous mode */ + 0x00, /* collision detect */ + 0x40, /* minimum frame length */ + 0xff, + 0x00, + 0x7f /* *multi IA */ }; + +static int i596_open(struct device *dev); +static int i596_start_xmit(struct sk_buff *skb, struct device *dev); +static void i596_interrupt(int irq, void *dev_id, struct pt_regs *regs); +static int i596_close(struct device *dev); +static struct net_device_stats *i596_get_stats(struct device *dev); +static void i596_add_cmd(struct device *dev, struct i596_cmd *cmd); +static void print_eth(char *); +static void set_multicast_list(struct device *dev); + +static int ticks_limit = 25; +static int max_cmd_backlog = 16; + + +static inline void CA(struct device *dev) +{ +#ifdef CONFIG_MVME16x_NET + if (MACH_IS_MVME16x) { + ((struct i596_reg *) dev->base_addr)->ca = 1; + } +#endif +#ifdef CONFIG_BVME6000_NET + if (MACH_IS_BVME6000) { + volatile u32 i = *(volatile u32 *) (dev->base_addr); + } +#endif +#ifdef CONFIG_APRICOT_i596 + if (MACH_IS_APRICOT) { + outw(0, (short) (dev->base_addr) + 4); + } +#endif +} + + +static inline void MPU_PORT(struct device *dev, int c, volatile void *x) +{ +#ifdef CONFIG_MVME16x_NET + if (MACH_IS_MVME16x) { + struct i596_reg *p = (struct i596_reg *) (dev->base_addr); + p->porthi = ((c) | (u32) (x)) & 0xffff; + p->portlo = ((c) | (u32) (x)) >> 16; + } +#endif +#ifdef CONFIG_BVME6000_NET + if (MACH_IS_BVME6000) { + u32 v = (u32) (c) | (u32) (x); + v = ((u32) (v) << 16) | ((u32) (v) >> 16); + *(volatile u32 *) dev->base_addr = v; + udelay(1); + *(volatile u32 *) dev->base_addr = v; + } +#endif +} + + +#if defined(CONFIG_MVME16x_NET) || defined(CONFIG_BVME6000_NET) +static void i596_error(int irq, void *dev_id, struct pt_regs *regs) +{ + struct device *dev = dev_id; + struct i596_cmd *cmd; + + struct i596_private *lp = (struct i596_private *) dev->priv; + printk("i596_error: lp = 0x%08x\n", (u32) lp); + printk("scp at %08x, .sysbus = %08x, .iscp = %08x\n", + (u32) & lp->scp, (u32) lp->scp.sysbus, (u32) lp->scp.iscp); + printk("iscp at %08x, .stat = %08x, .scb = %08x\n", + (u32) & lp->iscp, (u32) lp->iscp.stat, (u32) lp->iscp.scb); + printk("scb at %08x, .status = %04x, .command = %04x\n", + (u32) & lp->scb, lp->scb.status, lp->scb.command); + printk(" .cmd = %08x, .rfd = %08x\n", (u32) lp->scb.cmd, + (u32) lp->scb.rfd); + cmd = WSWAPcmd(lp->scb.cmd); + while (cmd && (u32) cmd < 0x1000000) { + printk("cmd at %08x, .status = %04x, .command = %04x, .next = %08x\n", + (u32) cmd, cmd->status, cmd->command, (u32) cmd->next); + cmd = WSWAPcmd(cmd->next); + } + while (1); +} +#endif + +static inline int init_rx_bufs(struct device *dev, int num) +{ + struct i596_private *lp = (struct i596_private *) dev->priv; + int i; + struct i596_rfd *rfd; + + lp->scb.rfd = (struct i596_rfd *) I596_NULL; + + if (i596_debug > 1) + printk("%s: init_rx_bufs %d.\n", dev->name, num); + + for (i = 0; i < num; i++) { + if (!(rfd = (struct i596_rfd *) kmalloc(sizeof(struct i596_rfd), GFP_KERNEL))) + break; + + rfd->stat = 0x0000; + rfd->rbd = I596_NULL; + rfd->count = 0; + rfd->size = 1532; + if (i == 0) { + rfd->cmd = CMD_EOL; + lp->rx_tail = rfd; + } else + rfd->cmd = 0x0000; + + rfd->next = lp->scb.rfd; + lp->scb.rfd = WSWAPrfd(rfd); + } + + if (i != 0) + lp->rx_tail->next = lp->scb.rfd; + + return (i); +} + +static inline void remove_rx_bufs(struct device *dev) +{ + struct i596_private *lp = (struct i596_private *) dev->priv; + struct i596_rfd *rfd = WSWAPrfd(lp->scb.rfd); + + lp->rx_tail->next = (struct i596_rfd *) I596_NULL; + + do { + lp->scb.rfd = rfd->next; + kfree(rfd); + rfd = WSWAPrfd(lp->scb.rfd); + } + while (rfd != lp->rx_tail); +} + +static inline void init_i596_mem(struct device *dev) +{ + struct i596_private *lp = (struct i596_private *) dev->priv; +#if !defined(CONFIG_MVME16x_NET) && !defined(CONFIG_BVME6000_NET) + short ioaddr = dev->base_addr; +#endif + int boguscnt = 100000; + unsigned long flags; + +#if defined(CONFIG_MVME16x_NET) || defined(CONFIG_BVME6000_NET) +#ifdef CONFIG_MVME16x_NET + if (MACH_IS_MVME16x) { + volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; + + /* Disable all ints for now */ + pcc2[0x28] = 1; + pcc2[0x2a] = 0x40; + pcc2[0x2b] = 0x40; /* Set snooping bits now! */ + } +#endif +#ifdef CONFIG_BVME6000_NET + if (MACH_IS_BVME6000) { + volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; + + *ethirq = 1; + } +#endif + + MPU_PORT(dev, PORT_RESET, 0); + + udelay(100); /* Wait 100us - seems to help */ + + /* change the scp address */ + + MPU_PORT(dev, PORT_ALTSCP, &lp->scp); + +#else + + /* change the scp address */ + outw(0, ioaddr); + outw(0, ioaddr); + outb(4, ioaddr + 0xf); + outw(((((int) &lp->scp) & 0xffff) | 2), ioaddr); + outw((((int) &lp->scp) >> 16) & 0xffff, ioaddr); +#endif + + lp->last_cmd = jiffies; + +#ifdef CONFIG_MVME16x_NET + if (MACH_IS_MVME16x) + lp->scp.sysbus = 0x00000054; +#endif +#ifdef CONFIG_BVME6000_NET + if (MACH_IS_BVME6000) + lp->scp.sysbus = 0x0000004c; +#endif +#ifdef CONFIG_APRICOT_i596 + if (MACH_IS_APRICOT) + lp->scp.sysbus = 0x00440000; +#endif + + lp->scp.iscp = WSWAPiscp(&(lp->iscp)); + lp->iscp.scb = WSWAPscb(&(lp->scb)); + lp->iscp.stat = ISCP_BUSY; + lp->cmd_backlog = 0; + + lp->cmd_head = lp->scb.cmd = (struct i596_cmd *) I596_NULL; + + if (i596_debug > 1) + printk("%s: starting i82596.\n", dev->name); + +#if !defined(CONFIG_MVME16x_NET) && !defined(CONFIG_BVME6000_NET) + (void) inb(ioaddr + 0x10); + outb(4, ioaddr + 0xf); +#endif + CA(dev); + + while (lp->iscp.stat) + if (--boguscnt == 0) { + printk("%s: i82596 initialization timed out with status %4.4x, cmd %4.4x.\n", + dev->name, lp->scb.status, lp->scb.command); + break; + } + lp->scb.command = 0; + +#ifdef CONFIG_MVME16x_NET + if (MACH_IS_MVME16x) { + volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; + + /* Enable ints, etc. now */ + pcc2[0x2a] = 0x08; + pcc2[0x2a] = 0x55; /* Edge sensitive */ + pcc2[0x2b] = 0x55; + } +#endif +#ifdef CONFIG_BVME6000_NET + if (MACH_IS_BVME6000) { + volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; + + *ethirq = 3; + } +#endif + + memcpy(lp->i596_config, init_setup, 14); + lp->set_conf.command = CmdConfigure; + i596_add_cmd(dev, &lp->set_conf); + + memcpy(lp->eth_addr, dev->dev_addr, 6); + lp->set_add.command = CmdSASetup; + i596_add_cmd(dev, &lp->set_add); + + lp->tdr.command = CmdTDR; + i596_add_cmd(dev, &lp->tdr); + + boguscnt = 200000; + + save_flags(flags); + cli(); + + while (lp->scb.command) + if (--boguscnt == 0) { + printk("%s: receive unit start timed out with status %4.4x, cmd %4.4x.\n", + dev->name, lp->scb.status, lp->scb.command); + break; + } + lp->scb.command = RX_START; + CA(dev); + + restore_flags(flags); + + boguscnt = 2000; + while (lp->scb.command) + if (--boguscnt == 0) { + printk("i82596 init timed out with status %4.4x, cmd %4.4x.\n", + lp->scb.status, lp->scb.command); + break; + } + return; +} + +static inline int i596_rx(struct device *dev) +{ + struct i596_private *lp = (struct i596_private *) dev->priv; + struct i596_rfd *rfd; + int frames = 0; + + if (i596_debug > 3) + printk("i596_rx()\n"); + + rfd = WSWAPrfd(lp->scb.rfd); /* Reference next frame descriptor to check */ + + while ((rfd->stat) & STAT_C) { /* Loop while we have complete frames */ + if (i596_debug > 2) + print_eth(rfd->data); + + if ((rfd->stat) & STAT_OK) { + /* a good frame */ + int pkt_len = rfd->count & 0x3fff; + struct sk_buff *skb = dev_alloc_skb(pkt_len); + + frames++; + + if (skb == NULL) { + printk("%s: i596_rx Memory squeeze, dropping packet.\n", dev->name); + lp->stats.rx_dropped++; + } else { + skb->dev = dev; + memcpy(skb_put(skb, pkt_len), rfd->data, pkt_len); + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); + lp->stats.rx_packets++; + lp->stats.rx_bytes += pkt_len; + } + } else { + lp->stats.rx_errors++; + if ((rfd->stat) & 0x0001) + lp->stats.collisions++; + if ((rfd->stat) & 0x0080) + lp->stats.rx_length_errors++; + if ((rfd->stat) & 0x0100) + lp->stats.rx_over_errors++; + if ((rfd->stat) & 0x0200) + lp->stats.rx_fifo_errors++; + if ((rfd->stat) & 0x0400) + lp->stats.rx_frame_errors++; + if ((rfd->stat) & 0x0800) + lp->stats.rx_crc_errors++; + if ((rfd->stat) & 0x1000) + lp->stats.rx_length_errors++; + } + + /* Clear the buffer descriptor count and EOF + F flags */ + + rfd->stat = 0; + rfd->count = 0; + rfd->cmd = CMD_EOL; + lp->rx_tail->cmd = 0; + lp->rx_tail = rfd; + lp->scb.rfd = rfd->next; + rfd = WSWAPrfd(lp->scb.rfd); /* Next frame descriptor to check */ + } + + if (i596_debug > 3) + printk("frames %d\n", frames); + + return 0; +} + +static inline void i596_cleanup_cmd(struct i596_private *lp) +{ + struct i596_cmd *ptr; + int boguscnt = 1000; + + if (i596_debug > 4) + printk("i596_cleanup_cmd\n"); + + while (lp->cmd_head != (struct i596_cmd *) I596_NULL) { + ptr = lp->cmd_head; + + lp->cmd_head = WSWAPcmd(lp->cmd_head->next); + lp->cmd_backlog--; + + switch ((ptr->command) & 0x7) { + case CmdTx: + { + struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; + struct sk_buff *skb = tx_cmd->skb; + + dev_kfree_skb(skb); + + lp->stats.tx_errors++; + lp->stats.tx_aborted_errors++; + + ptr->next = (struct i596_cmd *) I596_NULL; + kfree(tx_cmd); + break; + } + case CmdMulticastList: + { + ptr->next = (struct i596_cmd *) I596_NULL; + kfree(ptr); + break; + } + default: + ptr->next = (struct i596_cmd *) I596_NULL; + } + } + + while (lp->scb.command) + if (--boguscnt == 0) { + printk("i596_cleanup_cmd timed out with status %4.4x, cmd %4.4x.\n", + lp->scb.status, lp->scb.command); + break; + } + lp->scb.cmd = WSWAPcmd(lp->cmd_head); +} + +static inline void i596_reset(struct device *dev, struct i596_private *lp, int ioaddr) +{ + int boguscnt = 1000; + unsigned long flags; + + if (i596_debug > 1) + printk("i596_reset\n"); + + save_flags(flags); + cli(); + + while (lp->scb.command) + if (--boguscnt == 0) { + printk("i596_reset timed out with status %4.4x, cmd %4.4x.\n", + lp->scb.status, lp->scb.command); + break; + } + dev->start = 0; + dev->tbusy = 1; + + lp->scb.command = CUC_ABORT | RX_ABORT; + CA(dev); + + /* wait for shutdown */ + boguscnt = 4000; + + while (lp->scb.command) + if (--boguscnt == 0) { + printk("i596_reset 2 timed out with status %4.4x, cmd %4.4x.\n", + lp->scb.status, lp->scb.command); + break; + } + restore_flags(flags); + + i596_cleanup_cmd(lp); + i596_rx(dev); + + dev->start = 1; + dev->tbusy = 0; + dev->interrupt = 0; + init_i596_mem(dev); +} + +static void i596_add_cmd(struct device *dev, struct i596_cmd *cmd) +{ + struct i596_private *lp = (struct i596_private *) dev->priv; + int ioaddr = dev->base_addr; + unsigned long flags; + int boguscnt = 1000; + + if (i596_debug > 4) + printk("i596_add_cmd\n"); + + cmd->status = 0; + cmd->command |= (CMD_EOL | CMD_INTR); + cmd->next = (struct i596_cmd *) I596_NULL; + save_flags(flags); + cli(); + + /* + * RGH 300597: Looks to me like there could be a race condition + * here. Just because we havn't picked up all the command items + * yet, doesn't mean that the 82596 hasn't finished processing + * them. So, we may need to do a CUC_START anyway. + * Maybe not. If it interrupts saying the CU is idle when there + * is still something in the cmd queue, the int handler with restart + * the CU. + */ + + if (lp->cmd_head != (struct i596_cmd *) I596_NULL) { + lp->cmd_tail->next = WSWAPcmd(cmd); + } else { + lp->cmd_head = cmd; + while (lp->scb.command) + if (--boguscnt == 0) { + printk("i596_add_cmd timed out with status %4.4x, cmd %4.4x.\n", + lp->scb.status, lp->scb.command); + break; + } + lp->scb.cmd = WSWAPcmd(cmd); + lp->scb.command = CUC_START; + CA(dev); + } + lp->cmd_tail = cmd; + lp->cmd_backlog++; + + lp->cmd_head = WSWAPcmd(lp->scb.cmd); /* Is this redundant? RGH 300597 */ + restore_flags(flags); + + if (lp->cmd_backlog > max_cmd_backlog) { + unsigned long tickssofar = jiffies - lp->last_cmd; + + if (tickssofar < ticks_limit) + return; + + printk("%s: command unit timed out, status resetting.\n", dev->name); + + i596_reset(dev, lp, ioaddr); + } +} + +static int i596_open(struct device *dev) +{ + int i; + + if (i596_debug > 1) + printk("%s: i596_open() irq %d.\n", dev->name, dev->irq); + + if (request_irq(dev->irq, &i596_interrupt, 0, "apricot", dev)) + return -EAGAIN; +#ifdef CONFIG_MVME16x_NET + if (MACH_IS_MVME16x) { + if (request_irq(0x56, &i596_error, 0, "apricot_error", dev)) + return -EAGAIN; + } +#endif + if ((i = init_rx_bufs(dev, RX_RING_SIZE)) < RX_RING_SIZE) + printk("%s: only able to allocate %d receive buffers\n", dev->name, i); + + if (i < 4) { + free_irq(dev->irq, dev); + return -EAGAIN; + } + dev->tbusy = 0; + dev->interrupt = 0; + dev->start = 1; + MOD_INC_USE_COUNT; + + /* Initialize the 82596 memory */ + init_i596_mem(dev); + + return 0; /* Always succeed */ +} + +static int i596_start_xmit(struct sk_buff *skb, struct device *dev) +{ + struct i596_private *lp = (struct i596_private *) dev->priv; + int ioaddr = dev->base_addr; + struct tx_cmd *tx_cmd; + + if (i596_debug > 2) + printk("%s: 82596 start xmit\n", dev->name); + + /* Transmitter timeout, serious problems. */ + if (dev->tbusy) { + int tickssofar = jiffies - dev->trans_start; + if (tickssofar < 5) + return 1; + printk("%s: transmit timed out, status resetting.\n", + dev->name); + lp->stats.tx_errors++; + /* Try to restart the adaptor */ + if (lp->last_restart == lp->stats.tx_packets) { + if (i596_debug > 1) + printk("Resetting board.\n"); + + /* Shutdown and restart */ + i596_reset(dev, lp, ioaddr); + } else { + /* Issue a channel attention signal */ + if (i596_debug > 1) + printk("Kicking board.\n"); + lp->scb.command = CUC_START | RX_START; + CA(dev); + lp->last_restart = lp->stats.tx_packets; + } + dev->tbusy = 0; + dev->trans_start = jiffies; + } + if (i596_debug > 3) + printk("%s: i596_start_xmit() called\n", dev->name); + + /* Block a timer-based transmit from overlapping. This could better be + done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */ + if (test_and_set_bit(0, (void *) &dev->tbusy) != 0) + printk("%s: Transmitter access conflict.\n", dev->name); + else { + short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; + dev->trans_start = jiffies; + + tx_cmd = (struct tx_cmd *) kmalloc((sizeof(struct tx_cmd) + sizeof(struct i596_tbd)), GFP_ATOMIC); + if (tx_cmd == NULL) { + printk("%s: i596_xmit Memory squeeze, dropping packet.\n", dev->name); + lp->stats.tx_dropped++; + + dev_kfree_skb(skb); + } else { + struct i596_tbd *tbd = (struct i596_tbd *) (tx_cmd + 1); + tx_cmd->tbd = WSWAPtbd(tbd); + tbd->next = (struct i596_tbd *) I596_NULL; + + tx_cmd->cmd.command = CMD_FLEX | CmdTx; + tx_cmd->skb = skb; + + tx_cmd->pad = 0; + tx_cmd->size = 0; + tbd->pad = 0; + tbd->size = EOF | length; + + tbd->data = WSWAPchar(skb->data); + + if (i596_debug > 3) + print_eth(skb->data); + i596_add_cmd(dev, (struct i596_cmd *) tx_cmd); + + lp->stats.tx_packets++; + lp->stats.tx_bytes += length; + } + } + + dev->tbusy = 0; + + return 0; +} + + +static void print_eth(char *add) +{ + int i; + + printk("print_eth(%08x)\n", (unsigned int) add); + printk("Dest "); + for (i = 0; i < 6; i++) + printk(" %2.2X", (unsigned char) add[i]); + printk("\n"); + + printk("Source"); + for (i = 0; i < 6; i++) + printk(" %2.2X", (unsigned char) add[i + 6]); + printk("\n"); + printk("type %2.2X%2.2X\n", (unsigned char) add[12], (unsigned char) add[13]); +} + +__initfunc(int i82596_probe(struct device *dev)) +{ + int i; + struct i596_private *lp; + char eth_addr[6]; + +#ifdef CONFIG_MVME16x_NET + if (MACH_IS_MVME16x) { + static int probed = 0; + + if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) { + printk("Ethernet probe disabled - chip not present\n"); + return ENODEV; + } + if (probed) + return ENODEV; + probed++; + memcpy(eth_addr, (void *) 0xfffc1f2c, 6); /* YUCK! Get addr from NOVRAM */ + dev->base_addr = MVME_I596_BASE; + dev->irq = (unsigned) MVME16x_IRQ_I596; + } +#endif +#ifdef CONFIG_BVME6000_NET + if (MACH_IS_BVME6000) { + volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE; + unsigned char msr = rtc[3]; + int i; + + rtc[3] |= 0x80; + for (i = 0; i < 6; i++) + eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */ + rtc[3] = msr; + dev->base_addr = BVME_I596_BASE; + dev->irq = (unsigned) BVME_IRQ_I596; + } +#endif +#ifdef CONFIG_APRICOT_INTEL + int checksum = 0; + int ioaddr = 0x300; + + /* this is easy the ethernet interface can only be at 0x300 */ + /* first check nothing is already registered here */ + + if (check_region(ioaddr, I596_TOTAL_SIZE)) + return ENODEV; + + for (i = 0; i < 8; i++) { + eth_addr[i] = inb(ioaddr + 8 + i); + checksum += eth_addr[i]; + } + + /* checksum is a multiple of 0x100, got this wrong first time + some machines have 0x100, some 0x200. The DOS driver doesn't + even bother with the checksum */ + + if (checksum % 0x100) + return ENODEV; + + /* Some other boards trip the checksum.. but then appear as ether + address 0. Trap these - AC */ + + if (memcmp(eth_addr, "\x00\x00\x49", 3) != 0) + return ENODEV; + + request_region(ioaddr, I596_TOTAL_SIZE, "i596"); + + dev->base_addr = ioaddr; + dev->irq = 10; +#endif + ether_setup(dev); + printk("%s: 82596 at %#3lx,", dev->name, dev->base_addr); + + for (i = 0; i < 6; i++) + printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]); + + printk(" IRQ %d.\n", dev->irq); + + if (i596_debug > 0) + printk(version); + + /* The APRICOT-specific entries in the device structure. */ + dev->open = &i596_open; + dev->stop = &i596_close; + dev->hard_start_xmit = &i596_start_xmit; + dev->get_stats = &i596_get_stats; + dev->set_multicast_list = &set_multicast_list; + + dev->mem_start = (int) kmalloc(sizeof(struct i596_private) + 0x0f, GFP_KERNEL); + /* align for scp */ + dev->priv = (void *) ((dev->mem_start + 0xf) & 0xfffffff0); + + lp = (struct i596_private *) dev->priv; + if (i596_debug) + printk("%s: lp at 0x%08lx, lp->scb at 0x%08lx\n" + ,dev->name, (unsigned long) lp, (unsigned long) &lp->scb); + memset((void *) lp, 0, sizeof(struct i596_private)); + lp->scb.command = 0; + lp->scb.cmd = (struct i596_cmd *) I596_NULL; + lp->scb.rfd = (struct i596_rfd *) I596_NULL; + + return 0; +} + +static void i596_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + struct device *dev = dev_id; + struct i596_private *lp; + short ioaddr; + int boguscnt = 2000; + unsigned short status, ack_cmd = 0; + +#ifdef CONFIG_BVME6000_NET + if (MACH_IS_BVME6000) { + if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) { + i596_error(BVME_IRQ_I596, NULL, NULL); + return; + } + } +#endif + if (dev == NULL) { + printk("i596_interrupt(): irq %d for unknown device.\n", irq); + return; + } + if (i596_debug > 3) + printk("%s: i596_interrupt(): irq %d\n", dev->name, irq); + + if (dev->interrupt) + printk("%s: Re-entering the interrupt handler.\n", dev->name); + + dev->interrupt = 1; + + ioaddr = dev->base_addr; + + lp = (struct i596_private *) dev->priv; + + while (lp->scb.command) + if (--boguscnt == 0) { + printk("%s: i596 interrupt, timeout status %4.4x command %4.4x.\n", dev->name, lp->scb.status, lp->scb.command); + break; + } + status = lp->scb.status; + + if (i596_debug > 4) + printk("%s: i596 interrupt, status %4.4x.\n", dev->name, status); + + ack_cmd = status & 0xf000; + + if ((status & 0x8000) || (status & 0x2000)) { + struct i596_cmd *ptr; + + if ((i596_debug > 4) && (status & 0x8000)) + printk("%s: i596 interrupt completed command.\n", dev->name); + if ((i596_debug > 4) && (status & 0x2000)) + printk("%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700); + + while ((lp->cmd_head != (struct i596_cmd *) I596_NULL) && (lp->cmd_head->status & STAT_C)) { + ptr = lp->cmd_head; + + if (i596_debug > 2) + printk("cmd_head->status = %04x, ->command = %04x\n", + lp->cmd_head->status, lp->cmd_head->command); + lp->cmd_head = WSWAPcmd(lp->cmd_head->next); + lp->cmd_backlog--; + + switch ((ptr->command) & 0x7) { + case CmdTx: + { + struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; + struct sk_buff *skb = tx_cmd->skb; + + if ((ptr->status) & STAT_OK) { + if (i596_debug > 2) + print_eth(skb->data); + } else { + lp->stats.tx_errors++; + if ((ptr->status) & 0x0020) + lp->stats.collisions++; + if (!((ptr->status) & 0x0040)) + lp->stats.tx_heartbeat_errors++; + if ((ptr->status) & 0x0400) + lp->stats.tx_carrier_errors++; + if ((ptr->status) & 0x0800) + lp->stats.collisions++; + if ((ptr->status) & 0x1000) + lp->stats.tx_aborted_errors++; + } + + dev_kfree_skb(skb); + + ptr->next = (struct i596_cmd *) I596_NULL; + kfree(tx_cmd); + break; + } + case CmdMulticastList: + { + ptr->next = (struct i596_cmd *) I596_NULL; + kfree(ptr); + break; + } + case CmdTDR: + { + unsigned long status = *((unsigned long *) (ptr + 1)); + + if (status & 0x8000) { + if (i596_debug > 3) + printk("%s: link ok.\n", dev->name); + } else { + if (status & 0x4000) + printk("%s: Transceiver problem.\n", dev->name); + if (status & 0x2000) + printk("%s: Termination problem.\n", dev->name); + if (status & 0x1000) + printk("%s: Short circuit.\n", dev->name); + + if (i596_debug > 1) + printk("%s: Time %ld.\n", dev->name, status & 0x07ff); + } + break; + } + case CmdConfigure: + { + ptr->next = (struct i596_cmd *) I596_NULL; + /* Zap command so set_multicast_list() knows it is free */ + ptr->command = 0; + break; + } + default: + ptr->next = (struct i596_cmd *) I596_NULL; + } + lp->last_cmd = jiffies; + } + + ptr = lp->cmd_head; + while ((ptr != (struct i596_cmd *) I596_NULL) && (ptr != lp->cmd_tail)) { + ptr->command &= 0x1fff; + ptr = WSWAPcmd(ptr->next); + } + + if ((lp->cmd_head != (struct i596_cmd *) I596_NULL) && (dev->start)) + ack_cmd |= CUC_START; + lp->scb.cmd = WSWAPcmd(lp->cmd_head); + } + if ((status & 0x1000) || (status & 0x4000)) { + if ((i596_debug > 4) && (status & 0x4000)) + printk("%s: i596 interrupt received a frame.\n", dev->name); + /* Only RX_START if stopped - RGH 07-07-96 */ + if (status & 0x1000) { + if (dev->start) + ack_cmd |= RX_START; + if (i596_debug > 1) + printk("%s: i596 interrupt receive unit inactive %x.\n", dev->name, status & 0x00f0); + } + i596_rx(dev); + } + /* acknowledge the interrupt */ + +/* COMMENTED OUT <<<<< + if ((lp->scb.cmd != (struct i596_cmd *) I596_NULL) && (dev->start)) + ack_cmd |= CUC_START; + */ + boguscnt = 1000; + while (lp->scb.command) + if (--boguscnt == 0) { + printk("%s: i596 interrupt, timeout status %4.4x command %4.4x.\n", dev->name, lp->scb.status, lp->scb.command); + break; + } + lp->scb.command = ack_cmd; + +#ifdef CONFIG_MVME16x_NET + if (MACH_IS_MVME16x) { + /* Ack the interrupt */ + + volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; + + pcc2[0x2a] |= 0x08; + } +#endif +#ifdef CONFIG_BVME6000_NET + if (MACH_IS_BVME6000) { + volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; + + *ethirq = 1; + *ethirq = 3; + } +#endif +#ifdef CONFIG_APRICOT_INTEL + (void) inb(ioaddr + 0x10); + outb(4, ioaddr + 0xf); +#endif + CA(dev); + + if (i596_debug > 4) + printk("%s: exiting interrupt.\n", dev->name); + + dev->interrupt = 0; + return; +} + +static int i596_close(struct device *dev) +{ + struct i596_private *lp = (struct i596_private *) dev->priv; + int boguscnt = 2000; + unsigned long flags; + + dev->start = 0; + dev->tbusy = 1; + + if (i596_debug > 1) + printk("%s: Shutting down ethercard, status was %4.4x.\n", + dev->name, lp->scb.status); + + save_flags(flags); + cli(); + + while (lp->scb.command) + if (--boguscnt == 0) { + printk("%s: close1 timed timed out with status %4.4x, cmd %4.4x.\n", + dev->name, lp->scb.status, lp->scb.command); + break; + } + lp->scb.command = CUC_ABORT | RX_ABORT; + CA(dev); + + boguscnt = 2000; + + while (lp->scb.command) + if (--boguscnt == 0) { + printk("%s: close2 timed timed out with status %4.4x, cmd %4.4x.\n", + dev->name, lp->scb.status, lp->scb.command); + break; + } + restore_flags(flags); + + i596_cleanup_cmd(lp); + +#ifdef CONFIG_MVME16x_NET + if (MACH_IS_MVME16x) { + volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; + + /* Disable all ints */ + pcc2[0x28] = 1; + pcc2[0x2a] = 0x40; + pcc2[0x2b] = 0x40; /* Set snooping bits now! */ + } +#endif +#ifdef CONFIG_BVME6000_NET + if (MACH_IS_BVME6000) { + volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; + + *ethirq = 1; + } +#endif + + free_irq(dev->irq, dev); + remove_rx_bufs(dev); + MOD_DEC_USE_COUNT; + + return 0; +} + +static struct net_device_stats * + i596_get_stats(struct device *dev) +{ + struct i596_private *lp = (struct i596_private *) dev->priv; + + return &lp->stats; +} + +/* + * Set or clear the multicast filter for this adaptor. + */ + +static void set_multicast_list(struct device *dev) +{ + struct i596_private *lp = (struct i596_private *) dev->priv; + struct i596_cmd *cmd; + int config = 0; + + if (i596_debug > 1) + printk("%s: set multicast list, %d entries, promisc %s, allmulti %s\n", dev->name, dev->mc_count, dev->flags & IFF_PROMISC ? "ON" : "OFF", dev->flags & IFF_ALLMULTI ? "ON" : "OFF"); + + if ((dev->flags & IFF_PROMISC) && !(lp->i596_config[8] & 0x01)) { + lp->i596_config[8] |= 0x01; + config = 1; + } + if (!(dev->flags & IFF_PROMISC) && (lp->i596_config[8] & 0x01)) { + lp->i596_config[8] &= ~0x01; + config = 1; + } + if ((dev->flags & IFF_ALLMULTI) && (lp->i596_config[11] & 0x20)) { + lp->i596_config[11] &= ~0x20; + config = 1; + } + if (!(dev->flags & IFF_ALLMULTI) && !(lp->i596_config[11] & 0x20)) { + lp->i596_config[11] |= 0x20; + config = 1; + } + if (config) { + if (lp->set_conf.command) + printk("%s: config change request already queued\n", + dev->name); + else { + lp->set_conf.command = CmdConfigure; + i596_add_cmd(dev, &lp->set_conf); + } + } + if (dev->mc_count > 0) { + struct dev_mc_list *dmi; + unsigned char *cp; + cmd = (struct i596_cmd *) kmalloc(sizeof(struct i596_cmd) + 2 + dev->mc_count * 6, GFP_ATOMIC); + if (cmd == NULL) { + printk("%s: set_multicast Memory squeeze.\n", dev->name); + return; + } + cmd->command = CmdMulticastList; + *((unsigned short *) (cmd + 1)) = dev->mc_count * 6; + cp = ((unsigned char *) (cmd + 1)) + 2; + for (dmi = dev->mc_list; dmi != NULL; dmi = dmi->next) { + memcpy(cp, dmi->dmi_addr, 6); + if (i596_debug > 1) + printk("%s: Adding address %02x:%02x:%02x:%02x:%02x:%02x\n", dev->name, *(cp + 0), *(cp + 1), *(cp + 2), *(cp + 3), *(cp + 4), *(cp + 5)); + cp += 6; + } + if (i596_debug > 2) + print_eth(((char *) (cmd + 1)) + 2); + i596_add_cmd(dev, cmd); + } +} + +#ifdef HAVE_DEVLIST +static unsigned int i596_portlist[] __initdata = +{0x300, 0}; +struct netdev_entry i596_drv = +{"apricot", i82596_probe, I596_TOTAL_SIZE, apricot_portlist}; +#endif + +#ifdef MODULE +static char devicename[9] = +{0,}; +static struct device dev_apricot = +{ + devicename, /* device name inserted by /linux/drivers/net/net_init.c */ + 0, 0, 0, 0, + 0x300, 10, + 0, 0, 0, NULL, i82596_probe}; + +static int io = 0x300; +static int irq = 10; +MODULE_PARM(irq, "i"); + +int init_module(void) +{ + dev_apricot.base_addr = io; + dev_apricot.irq = irq; + if (register_netdev(&dev_apricot) != 0) + return -EIO; + return 0; +} + +void cleanup_module(void) +{ + unregister_netdev(&dev_apricot); + kfree((void *) dev_apricot.mem_start); + dev_apricot.priv = NULL; + + /* If we don't do this, we can't re-insmod it later. */ + release_region(dev_apricot.base_addr, I596_TOTAL_SIZE); +} + +#endif /* MODULE */ + +/* + * Local variables: + * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c 82596.c" + * End: + */ -- cgit v1.2.3