| /* wd.c: A WD80x3 ethernet driver for linux. */ |
| /* |
| Written 1993 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 Public License, |
| incorporated herein by reference. |
| |
| This is a driver for WD8003 and WD8013 "compatible" ethercards. |
| |
| The Author may be reached as becker@super.org or |
| C/O Supercomputing Research Ctr., 17100 Science Dr., Bowie MD 20715 |
| |
| Thanks to Russ Nelson (nelson@crnwyr.com) for loaning me a WD8013. |
| */ |
| |
| static char *version = |
| "wd.c:v0.99-14 11/21/93 Donald Becker (becker@super.org)\n"; |
| |
| #include <linux/config.h> |
| #include <linux/kernel.h> |
| #include <linux/sched.h> |
| #include <linux/errno.h> |
| #include <linux/string.h> |
| #include <asm/io.h> |
| #include <asm/system.h> |
| |
| #include "dev.h" |
| #include "8390.h" |
| |
| /* Compatibility definitions for earlier kernel versions. */ |
| #ifndef HAVE_PORTRESERVE |
| #define check_region(ioaddr, size) 0 |
| #define snarf_region(ioaddr, size) do ; while (0) |
| #endif |
| |
| int wd_probe(struct device *dev); |
| int wdprobe1(int ioaddr, struct device *dev); |
| |
| static int wd_open(struct device *dev); |
| static void wd_reset_8390(struct device *dev); |
| static int wd_block_input(struct device *dev, int count, |
| char *buf, int ring_offset); |
| static void wd_block_output(struct device *dev, int count, |
| const unsigned char *buf, const start_page); |
| static int wd_close_card(struct 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 NIC from the base_addr. */ |
| |
| /* 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 wdprobe1() routine initializes the card and fills the |
| station address field. */ |
| |
| int wd_probe(struct device *dev) |
| { |
| int *port, ports[] = {0x300, 0x280, 0x380, 0x240, 0}; |
| short ioaddr = dev->base_addr; |
| |
| if (ioaddr < 0) |
| return ENXIO; /* Don't probe at all. */ |
| if (ioaddr > 0x100) |
| return ! wdprobe1(ioaddr, dev); |
| |
| for (port = &ports[0]; *port; port++) { |
| if (check_region(*port, 32)) |
| continue; |
| if (inb(*port + 8) != 0xff |
| && inb(*port + 9) != 0xff /* Extra check to avoid soundcard. */ |
| && wdprobe1(*port, dev)) |
| return 0; |
| } |
| dev->base_addr = ioaddr; |
| return ENODEV; |
| } |
| |
| int wdprobe1(int ioaddr, struct device *dev) |
| { |
| int i; |
| unsigned char *station_addr = dev->dev_addr; |
| int checksum = 0; |
| int ancient = 0; /* An old card without config registers. */ |
| int word16 = 0; /* 0 = 8 bit, 1 = 16 bit */ |
| char *model_name; |
| |
| for (i = 0; i < 8; i++) |
| checksum += inb(ioaddr + 8 + i); |
| if ((checksum & 0xff) != 0xFF) |
| return 0; |
| |
| printk("%s: WD80x3 at %#3x, ", dev->name, ioaddr); |
| for (i = 0; i < 6; i++) |
| printk(" %2.2X", station_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; |
| |
| /* 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. */ |
| autoirq_setup(0); |
| 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... */ |
| dev->irq = autoirq_report(2); |
| 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. */ |
| if (irqaction (dev->irq, &ei_sigaction)) { |
| printk (" unable to get IRQ %d.\n", dev->irq); |
| return 0; |
| } |
| |
| /* OK, were are certain this is going to work. Setup the device. */ |
| snarf_region(ioaddr, 32); |
| ethdev_init(dev); |
| |
| 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; |
| ei_status.stop_page = word16 ? WD13_STOP_PG : WD03_STOP_PG; |
| |
| /* Don't map in the shared memory until the board is actually opened. */ |
| dev->rmem_start = dev->mem_start + TX_PAGES*256; |
| dev->mem_end = dev->rmem_end |
| = dev->mem_start + (ei_status.stop_page - WD_START_PG)*256; |
| |
| printk(" %s, IRQ %d, shared memory at %#lx-%#lx.\n", |
| model_name, dev->irq, dev->mem_start, dev->mem_end-1); |
| if (ei_debug > 0) |
| printk(version); |
| |
| ei_status.reset_8390 = &wd_reset_8390; |
| ei_status.block_input = &wd_block_input; |
| ei_status.block_output = &wd_block_output; |
| dev->open = &wd_open; |
| dev->stop = &wd_close_card; |
| NS8390_init(dev, 0); |
| |
| return dev->base_addr; |
| } |
| |
| static int |
| wd_open(struct 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 */ |
| |
| return ei_open(dev); |
| } |
| |
| static void |
| wd_reset_8390(struct 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; |
| } |
| |
| /* 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 int |
| wd_block_input(struct device *dev, int count, char *buf, int ring_offset) |
| { |
| int wd_cmdreg = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */ |
| long xfer_start = dev->mem_start + ring_offset - (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 (count == 4) { |
| if (ei_status.word16) |
| outb(ISA16 | ei_status.reg5, wd_cmdreg+WD_CMDREG5); |
| ((int*)buf)[0] = ((int*)xfer_start)[0]; |
| return 0; |
| } |
| |
| if (xfer_start + count > dev->rmem_end) { |
| /* We must wrap the input move. */ |
| int semi_count = dev->rmem_end - xfer_start; |
| memcpy(buf, (char *)xfer_start, semi_count); |
| count -= semi_count; |
| memcpy(buf + semi_count, (char *)dev->rmem_start, count); |
| } else |
| memcpy(buf, (char *)xfer_start, count); |
| |
| /* Turn off 16 bit access so that reboot works. ISA brain-damage */ |
| if (ei_status.word16) |
| outb(ei_status.reg5, wd_cmdreg+WD_CMDREG5); |
| |
| return 0; |
| } |
| |
| static void |
| wd_block_output(struct device *dev, int count, const unsigned char *buf, |
| int start_page) |
| { |
| int wd_cmdreg = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */ |
| long shmem = dev->mem_start + ((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((char *)shmem, buf, count); |
| outb(ei_status.reg5, wd_cmdreg+WD_CMDREG5); |
| } else |
| memcpy((char *)shmem, buf, count); |
| } |
| |
| |
| static int |
| wd_close_card(struct 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); |
| NS8390_init(dev, 0); |
| |
| /* Change from 16-bit to 8-bit shared memory so reboot works. */ |
| outb(ei_status.reg5, wd_cmdreg + WD_CMDREG5 ); |
| |
| /* And disable the shared memory. */ |
| outb(ei_status.reg0 & ~WD_MEMENB, wd_cmdreg); |
| |
| return 0; |
| } |
| |
| |
| /* |
| * Local variables: |
| * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c wd.c" |
| * version-control: t |
| * tab-width: 4 |
| * kept-new-versions: 5 |
| * End: |
| */ |