diff options
Diffstat (limited to 'drivers/net/wd.c')
| -rw-r--r-- | drivers/net/wd.c | 559 |
1 files changed, 559 insertions, 0 deletions
diff --git a/drivers/net/wd.c b/drivers/net/wd.c new file mode 100644 index 00000000000..1f05d9bd05e --- /dev/null +++ b/drivers/net/wd.c @@ -0,0 +1,559 @@ +/* wd.c: A WD80x3 ethernet driver for linux. */ +/* + Written 1993-94 by Donald Becker. + + Copyright 1993 United States Government as represented by the + Director, National Security Agency. + + This software may be used and distributed according to the terms + of the GNU General Public License, incorporated herein by reference. + + The author may be reached as becker@scyld.com, or C/O + Scyld Computing Corporation + 410 Severn Ave., Suite 210 + Annapolis MD 21403 + + This is a driver for WD8003 and WD8013 "compatible" ethercards. + + Thanks to Russ Nelson (nelson@crnwyr.com) for loaning me a WD8013. + + Changelog: + + Paul Gortmaker : multiple card support for module users, support + for non-standard memory sizes. + + +*/ + +static const char version[] = + "wd.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n"; + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> + +#include <asm/io.h> +#include <asm/system.h> + +#include "8390.h" + +#define DRV_NAME "wd" + +/* A zero-terminated list of I/O addresses to be probed. */ +static unsigned int wd_portlist[] __initdata = +{0x300, 0x280, 0x380, 0x240, 0}; + +static int wd_probe1(struct net_device *dev, int ioaddr); + +static int wd_open(struct net_device *dev); +static void wd_reset_8390(struct net_device *dev); +static void wd_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, + int ring_page); +static void wd_block_input(struct net_device *dev, int count, + struct sk_buff *skb, int ring_offset); +static void wd_block_output(struct net_device *dev, int count, + const unsigned char *buf, int start_page); +static int wd_close(struct net_device *dev); + + +#define WD_START_PG 0x00 /* First page of TX buffer */ +#define WD03_STOP_PG 0x20 /* Last page +1 of RX ring */ +#define WD13_STOP_PG 0x40 /* Last page +1 of RX ring */ + +#define WD_CMDREG 0 /* Offset to ASIC command register. */ +#define WD_RESET 0x80 /* Board reset, in WD_CMDREG. */ +#define WD_MEMENB 0x40 /* Enable the shared memory. */ +#define WD_CMDREG5 5 /* Offset to 16-bit-only ASIC register 5. */ +#define ISA16 0x80 /* Enable 16 bit access from the ISA bus. */ +#define NIC16 0x40 /* Enable 16 bit access from the 8390. */ +#define WD_NIC_OFFSET 16 /* Offset to the 8390 from the base_addr. */ +#define WD_IO_EXTENT 32 + + +/* Probe for the WD8003 and WD8013. These cards have the station + address PROM at I/O ports <base>+8 to <base>+13, with a checksum + following. A Soundblaster can have the same checksum as an WDethercard, + so we have an extra exclusionary check for it. + + The wd_probe1() routine initializes the card and fills the + station address field. */ + +static int __init do_wd_probe(struct net_device *dev) +{ + int i; + struct resource *r; + int base_addr = dev->base_addr; + int irq = dev->irq; + int mem_start = dev->mem_start; + int mem_end = dev->mem_end; + + SET_MODULE_OWNER(dev); + + if (base_addr > 0x1ff) { /* Check a user specified location. */ + r = request_region(base_addr, WD_IO_EXTENT, "wd-probe"); + if ( r == NULL) + return -EBUSY; + i = wd_probe1(dev, base_addr); + if (i != 0) + release_region(base_addr, WD_IO_EXTENT); + else + r->name = dev->name; + return i; + } + else if (base_addr != 0) /* Don't probe at all. */ + return -ENXIO; + + for (i = 0; wd_portlist[i]; i++) { + int ioaddr = wd_portlist[i]; + r = request_region(ioaddr, WD_IO_EXTENT, "wd-probe"); + if (r == NULL) + continue; + if (wd_probe1(dev, ioaddr) == 0) { + r->name = dev->name; + return 0; + } + release_region(ioaddr, WD_IO_EXTENT); + dev->irq = irq; + dev->mem_start = mem_start; + dev->mem_end = mem_end; + } + + return -ENODEV; +} + +static void cleanup_card(struct net_device *dev) +{ + free_irq(dev->irq, dev); + release_region(dev->base_addr - WD_NIC_OFFSET, WD_IO_EXTENT); + iounmap(ei_status.mem); +} + +#ifndef MODULE +struct net_device * __init wd_probe(int unit) +{ + struct net_device *dev = alloc_ei_netdev(); + int err; + + if (!dev) + return ERR_PTR(-ENOMEM); + + sprintf(dev->name, "eth%d", unit); + netdev_boot_setup_check(dev); + + err = do_wd_probe(dev); + if (err) + goto out; + err = register_netdev(dev); + if (err) + goto out1; + return dev; +out1: + cleanup_card(dev); +out: + free_netdev(dev); + return ERR_PTR(err); +} +#endif + +static int __init wd_probe1(struct net_device *dev, int ioaddr) +{ + int i; + int checksum = 0; + int ancient = 0; /* An old card without config registers. */ + int word16 = 0; /* 0 = 8 bit, 1 = 16 bit */ + const char *model_name; + static unsigned version_printed; + + for (i = 0; i < 8; i++) + checksum += inb(ioaddr + 8 + i); + if (inb(ioaddr + 8) == 0xff /* Extra check to avoid soundcard. */ + || inb(ioaddr + 9) == 0xff + || (checksum & 0xff) != 0xFF) + return -ENODEV; + + /* Check for semi-valid mem_start/end values if supplied. */ + if ((dev->mem_start % 0x2000) || (dev->mem_end % 0x2000)) { + printk(KERN_WARNING "wd.c: user supplied mem_start or mem_end not on 8kB boundary - ignored.\n"); + dev->mem_start = 0; + dev->mem_end = 0; + } + + if (ei_debug && version_printed++ == 0) + printk(version); + + printk("%s: WD80x3 at %#3x,", dev->name, ioaddr); + for (i = 0; i < 6; i++) + printk(" %2.2X", dev->dev_addr[i] = inb(ioaddr + 8 + i)); + + /* The following PureData probe code was contributed by + Mike Jagdis <jaggy@purplet.demon.co.uk>. Puredata does software + configuration differently from others so we have to check for them. + This detects an 8 bit, 16 bit or dumb (Toshiba, jumpered) card. + */ + if (inb(ioaddr+0) == 'P' && inb(ioaddr+1) == 'D') { + unsigned char reg5 = inb(ioaddr+5); + + switch (inb(ioaddr+2)) { + case 0x03: word16 = 0; model_name = "PDI8023-8"; break; + case 0x05: word16 = 0; model_name = "PDUC8023"; break; + case 0x0a: word16 = 1; model_name = "PDI8023-16"; break; + /* Either 0x01 (dumb) or they've released a new version. */ + default: word16 = 0; model_name = "PDI8023"; break; + } + dev->mem_start = ((reg5 & 0x1c) + 0xc0) << 12; + dev->irq = (reg5 & 0xe0) == 0xe0 ? 10 : (reg5 >> 5) + 1; + } else { /* End of PureData probe */ + /* This method of checking for a 16-bit board is borrowed from the + we.c driver. A simpler method is just to look in ASIC reg. 0x03. + I'm comparing the two method in alpha test to make certain they + return the same result. */ + /* Check for the old 8 bit board - it has register 0/8 aliasing. + Do NOT check i>=6 here -- it hangs the old 8003 boards! */ + for (i = 0; i < 6; i++) + if (inb(ioaddr+i) != inb(ioaddr+8+i)) + break; + if (i >= 6) { + ancient = 1; + model_name = "WD8003-old"; + word16 = 0; + } else { + int tmp = inb(ioaddr+1); /* fiddle with 16bit bit */ + outb( tmp ^ 0x01, ioaddr+1 ); /* attempt to clear 16bit bit */ + if (((inb( ioaddr+1) & 0x01) == 0x01) /* A 16 bit card */ + && (tmp & 0x01) == 0x01 ) { /* In a 16 slot. */ + int asic_reg5 = inb(ioaddr+WD_CMDREG5); + /* Magic to set ASIC to word-wide mode. */ + outb( NIC16 | (asic_reg5&0x1f), ioaddr+WD_CMDREG5); + outb(tmp, ioaddr+1); + model_name = "WD8013"; + word16 = 1; /* We have a 16bit board here! */ + } else { + model_name = "WD8003"; + word16 = 0; + } + outb(tmp, ioaddr+1); /* Restore original reg1 value. */ + } +#ifndef final_version + if ( !ancient && (inb(ioaddr+1) & 0x01) != (word16 & 0x01)) + printk("\nWD80?3: Bus width conflict, %d (probe) != %d (reg report).", + word16 ? 16 : 8, (inb(ioaddr+1) & 0x01) ? 16 : 8); +#endif + } + +#if defined(WD_SHMEM) && WD_SHMEM > 0x80000 + /* Allow a compile-time override. */ + dev->mem_start = WD_SHMEM; +#else + if (dev->mem_start == 0) { + /* Sanity and old 8003 check */ + int reg0 = inb(ioaddr); + if (reg0 == 0xff || reg0 == 0) { + /* Future plan: this could check a few likely locations first. */ + dev->mem_start = 0xd0000; + printk(" assigning address %#lx", dev->mem_start); + } else { + int high_addr_bits = inb(ioaddr+WD_CMDREG5) & 0x1f; + /* Some boards don't have the register 5 -- it returns 0xff. */ + if (high_addr_bits == 0x1f || word16 == 0) + high_addr_bits = 0x01; + dev->mem_start = ((reg0&0x3f) << 13) + (high_addr_bits << 19); + } + } +#endif + + /* The 8390 isn't at the base address -- the ASIC regs are there! */ + dev->base_addr = ioaddr+WD_NIC_OFFSET; + + if (dev->irq < 2) { + int irqmap[] = {9,3,5,7,10,11,15,4}; + int reg1 = inb(ioaddr+1); + int reg4 = inb(ioaddr+4); + if (ancient || reg1 == 0xff) { /* Ack!! No way to read the IRQ! */ + short nic_addr = ioaddr+WD_NIC_OFFSET; + unsigned long irq_mask; + + /* We have an old-style ethercard that doesn't report its IRQ + line. Do autoirq to find the IRQ line. Note that this IS NOT + a reliable way to trigger an interrupt. */ + outb_p(E8390_NODMA + E8390_STOP, nic_addr); + outb(0x00, nic_addr+EN0_IMR); /* Disable all intrs. */ + + irq_mask = probe_irq_on(); + outb_p(0xff, nic_addr + EN0_IMR); /* Enable all interrupts. */ + outb_p(0x00, nic_addr + EN0_RCNTLO); + outb_p(0x00, nic_addr + EN0_RCNTHI); + outb(E8390_RREAD+E8390_START, nic_addr); /* Trigger it... */ + mdelay(20); + dev->irq = probe_irq_off(irq_mask); + + outb_p(0x00, nic_addr+EN0_IMR); /* Mask all intrs. again. */ + + if (ei_debug > 2) + printk(" autoirq is %d", dev->irq); + if (dev->irq < 2) + dev->irq = word16 ? 10 : 5; + } else + dev->irq = irqmap[((reg4 >> 5) & 0x03) + (reg1 & 0x04)]; + } else if (dev->irq == 2) /* Fixup bogosity: IRQ2 is really IRQ9 */ + dev->irq = 9; + + /* Snarf the interrupt now. There's no point in waiting since we cannot + share and the board will usually be enabled. */ + i = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev); + if (i) { + printk (" unable to get IRQ %d.\n", dev->irq); + return i; + } + + /* OK, were are certain this is going to work. Setup the device. */ + ei_status.name = model_name; + ei_status.word16 = word16; + ei_status.tx_start_page = WD_START_PG; + ei_status.rx_start_page = WD_START_PG + TX_PAGES; + + /* Don't map in the shared memory until the board is actually opened. */ + + /* Some cards (eg WD8003EBT) can be jumpered for more (32k!) memory. */ + if (dev->mem_end != 0) { + ei_status.stop_page = (dev->mem_end - dev->mem_start)/256; + ei_status.priv = dev->mem_end - dev->mem_start; + } else { + ei_status.stop_page = word16 ? WD13_STOP_PG : WD03_STOP_PG; + dev->mem_end = dev->mem_start + (ei_status.stop_page - WD_START_PG)*256; + ei_status.priv = (ei_status.stop_page - WD_START_PG)*256; + } + + ei_status.mem = ioremap(dev->mem_start, ei_status.priv); + if (!ei_status.mem) { + free_irq(dev->irq, dev); + return -ENOMEM; + } + + printk(" %s, IRQ %d, shared memory at %#lx-%#lx.\n", + model_name, dev->irq, dev->mem_start, dev->mem_end-1); + + ei_status.reset_8390 = &wd_reset_8390; + ei_status.block_input = &wd_block_input; + ei_status.block_output = &wd_block_output; + ei_status.get_8390_hdr = &wd_get_8390_hdr; + dev->open = &wd_open; + dev->stop = &wd_close; +#ifdef CONFIG_NET_POLL_CONTROLLER + dev->poll_controller = ei_poll; +#endif + NS8390_init(dev, 0); + +#if 1 + /* Enable interrupt generation on softconfig cards -- M.U */ + /* .. but possibly potentially unsafe - Donald */ + if (inb(ioaddr+14) & 0x20) + outb(inb(ioaddr+4)|0x80, ioaddr+4); +#endif + + return 0; +} + +static int +wd_open(struct net_device *dev) +{ + int ioaddr = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */ + + /* Map in the shared memory. Always set register 0 last to remain + compatible with very old boards. */ + ei_status.reg0 = ((dev->mem_start>>13) & 0x3f) | WD_MEMENB; + ei_status.reg5 = ((dev->mem_start>>19) & 0x1f) | NIC16; + + if (ei_status.word16) + outb(ei_status.reg5, ioaddr+WD_CMDREG5); + outb(ei_status.reg0, ioaddr); /* WD_CMDREG */ + + ei_open(dev); + return 0; +} + +static void +wd_reset_8390(struct net_device *dev) +{ + int wd_cmd_port = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */ + + outb(WD_RESET, wd_cmd_port); + if (ei_debug > 1) printk("resetting the WD80x3 t=%lu...", jiffies); + ei_status.txing = 0; + + /* Set up the ASIC registers, just in case something changed them. */ + outb((((dev->mem_start>>13) & 0x3f)|WD_MEMENB), wd_cmd_port); + if (ei_status.word16) + outb(NIC16 | ((dev->mem_start>>19) & 0x1f), wd_cmd_port+WD_CMDREG5); + + if (ei_debug > 1) printk("reset done\n"); + return; +} + +/* Grab the 8390 specific header. Similar to the block_input routine, but + we don't need to be concerned with ring wrap as the header will be at + the start of a page, so we optimize accordingly. */ + +static void +wd_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page) +{ + + int wd_cmdreg = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */ + void __iomem *hdr_start = ei_status.mem + ((ring_page - WD_START_PG)<<8); + + /* We'll always get a 4 byte header read followed by a packet read, so + we enable 16 bit mode before the header, and disable after the body. */ + if (ei_status.word16) + outb(ISA16 | ei_status.reg5, wd_cmdreg+WD_CMDREG5); + +#ifdef __BIG_ENDIAN + /* Officially this is what we are doing, but the readl() is faster */ + /* unfortunately it isn't endian aware of the struct */ + memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr)); + hdr->count = le16_to_cpu(hdr->count); +#else + ((unsigned int*)hdr)[0] = readl(hdr_start); +#endif +} + +/* Block input and output are easy on shared memory ethercards, and trivial + on the Western digital card where there is no choice of how to do it. + The only complications are that the ring buffer wraps, and need to map + switch between 8- and 16-bit modes. */ + +static void +wd_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset) +{ + int wd_cmdreg = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */ + unsigned long offset = ring_offset - (WD_START_PG<<8); + void __iomem *xfer_start = ei_status.mem + offset; + + if (offset + count > ei_status.priv) { + /* We must wrap the input move. */ + int semi_count = ei_status.priv - offset; + memcpy_fromio(skb->data, xfer_start, semi_count); + count -= semi_count; + memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count); + } else { + /* Packet is in one chunk -- we can copy + cksum. */ + eth_io_copy_and_sum(skb, xfer_start, count, 0); + } + + /* Turn off 16 bit access so that reboot works. ISA brain-damage */ + if (ei_status.word16) + outb(ei_status.reg5, wd_cmdreg+WD_CMDREG5); +} + +static void +wd_block_output(struct net_device *dev, int count, const unsigned char *buf, + int start_page) +{ + int wd_cmdreg = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */ + void __iomem *shmem = ei_status.mem + ((start_page - WD_START_PG)<<8); + + + if (ei_status.word16) { + /* Turn on and off 16 bit access so that reboot works. */ + outb(ISA16 | ei_status.reg5, wd_cmdreg+WD_CMDREG5); + memcpy_toio(shmem, buf, count); + outb(ei_status.reg5, wd_cmdreg+WD_CMDREG5); + } else + memcpy_toio(shmem, buf, count); +} + + +static int +wd_close(struct net_device *dev) +{ + int wd_cmdreg = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */ + + if (ei_debug > 1) + printk("%s: Shutting down ethercard.\n", dev->name); + ei_close(dev); + + /* Change from 16-bit to 8-bit shared memory so reboot works. */ + if (ei_status.word16) + outb(ei_status.reg5, wd_cmdreg + WD_CMDREG5 ); + + /* And disable the shared memory. */ + outb(ei_status.reg0 & ~WD_MEMENB, wd_cmdreg); + + return 0; +} + + +#ifdef MODULE +#define MAX_WD_CARDS 4 /* Max number of wd cards per module */ +static struct net_device *dev_wd[MAX_WD_CARDS]; +static int io[MAX_WD_CARDS]; +static int irq[MAX_WD_CARDS]; +static int mem[MAX_WD_CARDS]; +static int mem_end[MAX_WD_CARDS]; /* for non std. mem size */ + +module_param_array(io, int, NULL, 0); +module_param_array(irq, int, NULL, 0); +module_param_array(mem, int, NULL, 0); +module_param_array(mem_end, int, NULL, 0); +MODULE_PARM_DESC(io, "I/O base address(es)"); +MODULE_PARM_DESC(irq, "IRQ number(s) (ignored for PureData boards)"); +MODULE_PARM_DESC(mem, "memory base address(es)(ignored for PureData boards)"); +MODULE_PARM_DESC(mem_end, "memory end address(es)"); +MODULE_DESCRIPTION("ISA Western Digital wd8003/wd8013 ; SMC Elite, Elite16 ethernet driver"); +MODULE_LICENSE("GPL"); + +/* This is set up so that only a single autoprobe takes place per call. +ISA device autoprobes on a running machine are not recommended. */ +int +init_module(void) +{ + struct net_device *dev; + int this_dev, found = 0; + + for (this_dev = 0; this_dev < MAX_WD_CARDS; this_dev++) { + if (io[this_dev] == 0) { + if (this_dev != 0) break; /* only autoprobe 1st one */ + printk(KERN_NOTICE "wd.c: Presently autoprobing (not recommended) for a single card.\n"); + } + dev = alloc_ei_netdev(); + if (!dev) + break; + dev->irq = irq[this_dev]; + dev->base_addr = io[this_dev]; + dev->mem_start = mem[this_dev]; + dev->mem_end = mem_end[this_dev]; + if (do_wd_probe(dev) == 0) { + if (register_netdev(dev) == 0) { + dev_wd[found++] = dev; + continue; + } + cleanup_card(dev); + } + free_netdev(dev); + printk(KERN_WARNING "wd.c: No wd80x3 card found (i/o = 0x%x).\n", io[this_dev]); + break; + } + if (found) + return 0; + return -ENXIO; +} + +void +cleanup_module(void) +{ + int this_dev; + + for (this_dev = 0; this_dev < MAX_WD_CARDS; this_dev++) { + struct net_device *dev = dev_wd[this_dev]; + if (dev) { + unregister_netdev(dev); + cleanup_card(dev); + free_netdev(dev); + } + } +} +#endif /* MODULE */ |