269 lines
7.3 KiB
C
269 lines
7.3 KiB
C
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/* smc-ultra.c: A SMC Ultra ethernet driver for linux. */
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/*
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Written 1993 by Donald Becker. If released, this code will be
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Copyright 1993 United States Government as represented by the
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Director, National Security Agency. This software may be used and
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distributed according to the terms of the GNU Public License,
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incorporated herein by reference.
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This is a driver for the SMC Ultra ethercard.
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The Author may be reached as becker@super.org or
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C/O Supercomputing Research Ctr., 17100 Science Dr., Bowie MD 20715
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*/
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static char *version =
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"smc-ultra.c:v0.05 12/21/93 Donald Becker (becker@super.org)\n";
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#include "dev.h"
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#include "8390.h"
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/* Compatibility definitions for earlier kernel versions. */
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#ifndef HAVE_PORTRESERVE
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#define check_region(ioaddr, size) 0
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#define snarf_region(ioaddr, size); do ; while (0)
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#endif
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int ultraprobe(int ioaddr, struct device *dev);
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int ultraprobe1(int ioaddr, struct device *dev);
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static int ultra_open(struct device *dev);
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static void ultra_reset_8390(struct device *dev);
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static int ultra_block_input(struct device *dev, int count,
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char *buf, int ring_offset);
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static void ultra_block_output(struct device *dev, int count,
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const unsigned char *buf, const start_page);
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static int ultra_close_card(struct device *dev);
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#define START_PG 0x00 /* First page of TX buffer */
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#define ULTRA_CMDREG 0 /* Offset to ASIC command register. */
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#define ULTRA_RESET 0x80 /* Board reset, in ULTRA_CMDREG. */
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#define ULTRA_MEMENB 0x40 /* Enable the shared memory. */
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#define ULTRA_NIC_OFFSET 16 /* NIC register offset from the base_addr. */
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/* Probe for the Ultra. This looks like a 8013 with the station
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address PROM at I/O ports <base>+8 to <base>+13, with a checksum
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following.
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*/
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int ultra_probe(struct device *dev)
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{
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int *port, ports[] = {0x200, 0x220, 0x240, 0x280, 0x300, 0x340, 0x380, 0};
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unsigned short ioaddr = dev->base_addr;
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if (ioaddr > 0x1ff)
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return ! ultraprobe1(ioaddr, dev);
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else if (ioaddr > 0)
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return ENXIO; /* Don't probe at all. */
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for (port = &ports[0]; *port; port++) {
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if (check_region(*port, 32))
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continue;
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if ((inb(*port + 7) & 0xF0) == 0x20 /* Check chip ID nibble. */
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&& ultraprobe1(*port, dev) == 0)
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return 0;
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}
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dev->base_addr = ioaddr;
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return ENODEV;
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}
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int ultraprobe1(int ioaddr, struct device *dev)
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{
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int i;
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unsigned char *station_addr = dev->dev_addr;
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int checksum = 0;
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char *model_name;
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unsigned char eeprom_irq = 0;
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/* Values from various config regs. */
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unsigned char num_pages, irqreg, addr, reg4 = inb(ioaddr + 4) & 0x7f;
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/* Select the station address register set. */
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outb(reg4, ioaddr + 4);
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for (i = 0; i < 8; i++)
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checksum += inb(ioaddr + 8 + i);
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if ((checksum & 0xff) != 0xFF)
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return ENODEV;
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printk("%s: SMC Ultra at %#3x,", dev->name, ioaddr);
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for (i = 0; i < 6; i++)
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printk(" %2.2X", station_addr[i] = inb(ioaddr + 8 + i));
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/* Switch from the station address to the alternate register set and
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read the useful registers there. */
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outb(0x80 | reg4, ioaddr + 4);
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/* Enabled FINE16 mode to avoid BIOS ROM width mismatches during reboot. */
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outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
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irqreg = inb(ioaddr + 0xd);
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addr = inb(ioaddr + 0xb);
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/* Switch back to the station address register set so that the MS-DOS driver
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can find the card after a warm boot. */
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outb(reg4, ioaddr + 4);
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model_name = "SMC Ultra";
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if (dev->irq < 2) {
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unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
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int irq;
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/* The IRQ bits are split. */
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irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)];
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if (irq == 0) {
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printk(", failed to detect IRQ line.\n");
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return -EAGAIN;
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}
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dev->irq = irq;
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eeprom_irq = 1;
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}
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/* OK, were are certain this is going to work. Setup the device. */
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snarf_region(ioaddr, 32);
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/* The 8390 isn't at the base address, so fake the offset */
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dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;
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{
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int addr_tbl[4] = {0x0C0000, 0x0D0000, 0xFC0000, 0xFD0000};
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short num_pages_tbl[4] = {0x20, 0x40, 0x80, 0xff};
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dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ;
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num_pages = num_pages_tbl[(addr >> 4) & 3];
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}
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ethdev_init(dev);
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ei_status.name = model_name;
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ei_status.word16 = 1;
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ei_status.tx_start_page = START_PG;
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ei_status.rx_start_page = START_PG + TX_PAGES;
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ei_status.stop_page = num_pages;
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dev->rmem_start = dev->mem_start + TX_PAGES*256;
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dev->mem_end = dev->rmem_end
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= dev->mem_start + (ei_status.stop_page - START_PG)*256;
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printk(",%s IRQ %d memory %#x-%#x.\n", eeprom_irq ? "" : "assigned ",
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dev->irq, dev->mem_start, dev->mem_end-1);
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if (ei_debug > 0)
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printk(version);
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ei_status.reset_8390 = &ultra_reset_8390;
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ei_status.block_input = &ultra_block_input;
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ei_status.block_output = &ultra_block_output;
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dev->open = &ultra_open;
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dev->stop = &ultra_close_card;
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NS8390_init(dev, 0);
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return 0;
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}
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static int
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ultra_open(struct device *dev)
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{
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int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
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if (irqaction(dev->irq, &ei_sigaction))
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return -EAGAIN;
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outb(ULTRA_MEMENB, ioaddr); /* Enable memory, 16 bit mode. */
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outb(0x80, ioaddr + 5);
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outb(0x01, ioaddr + 6); /* Enable interrupts and memory. */
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return ei_open(dev);
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}
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static void
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ultra_reset_8390(struct device *dev)
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{
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int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */
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outb(ULTRA_RESET, cmd_port);
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if (ei_debug > 1) printk("resetting Ultra, t=%d...", jiffies);
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ei_status.txing = 0;
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outb(ULTRA_MEMENB, cmd_port);
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if (ei_debug > 1) printk("reset done\n");
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return;
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}
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/* Block input and output are easy on shared memory ethercards, the only
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complication is when the ring buffer wraps. */
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static int
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ultra_block_input(struct device *dev, int count, char *buf, int ring_offset)
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{
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void *xfer_start = (void *)(dev->mem_start + ring_offset
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- (START_PG<<8));
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if (xfer_start + count > (void*) dev->rmem_end) {
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/* We must wrap the input move. */
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int semi_count = (void*)dev->rmem_end - xfer_start;
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memcpy(buf, xfer_start, semi_count);
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count -= semi_count;
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memcpy(buf + semi_count, (char *)dev->rmem_start, count);
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return dev->rmem_start + count;
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}
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memcpy(buf, xfer_start, count);
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return ring_offset + count;
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}
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static void
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ultra_block_output(struct device *dev, int count, const unsigned char *buf,
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int start_page)
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{
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unsigned char *shmem
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= (unsigned char *)dev->mem_start + ((start_page - START_PG)<<8);
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memcpy(shmem, buf, count);
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}
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static int
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ultra_close_card(struct device *dev)
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{
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int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* CMDREG */
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dev->start = 0;
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dev->tbusy = 1;
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if (ei_debug > 1)
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printk("%s: Shutting down ethercard.\n", dev->name);
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outb(0x00, ioaddr + 6); /* Disable interrupts. */
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free_irq(dev->irq);
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irq2dev_map[dev->irq] = 0;
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NS8390_init(dev, 0);
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/* We should someday disable shared memory and change to 8-bit mode
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"just in case"... */
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return 0;
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}
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/*
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* Local variables:
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* compile-command: "gcc -D__KERNEL__ -Wall -O6 -I/usr/src/linux/net/inet -c smc-ultra.c"
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* version-control: t
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* kept-new-versions: 5
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* End:
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*/
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