328 lines
10 KiB
C
328 lines
10 KiB
C
/* hp.c: A HP LAN ethernet driver for linux. */
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/*
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Written 1993 by Donald Becker.
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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 HP LAN adaptors.
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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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"hp.c:v0.99.14a 12/2/93 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/ioport.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include "dev.h"
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#include "8390.h"
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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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#define HP_IO_EXTENT 32
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#define HP_DATAPORT 0x0c /* "Remote DMA" data port. */
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#define HP_ID 0x07
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#define HP_CONFIGURE 0x08 /* Configuration register. */
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#define HP_RUN 0x01 /* 1 == Run, 0 == reset. */
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#define HP_IRQ 0x0E /* Mask for software-configured IRQ line. */
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#define HP_DATAON 0x10 /* Turn on dataport */
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#define NIC_OFFSET 0x10 /* Offset the 8390 registers. */
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#define HP_START_PG 0x00 /* First page of TX buffer */
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#define HP_8BSTOP_PG 0x80 /* Last page +1 of RX ring */
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#define HP_16BSTOP_PG 0xFF /* Same, for 16 bit cards. */
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int hp_probe(struct device *dev);
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int hpprobe1(struct device *dev, int ioaddr);
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static void hp_reset_8390(struct device *dev);
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static int hp_block_input(struct device *dev, int count,
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char *buf, int ring_offset);
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static void hp_block_output(struct device *dev, int count,
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const unsigned char *buf, const start_page);
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static void hp_init_card(struct device *dev);
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/* The map from IRQ number to HP_CONFIGURE register setting. */
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/* My default is IRQ5 0 1 2 3 4 5 6 7 8 9 10 11 */
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static char irqmap[16] = { 0, 0, 4, 6, 8,10, 0,14, 0, 4, 2,12,0,0,0,0};
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/* Probe for an HP LAN adaptor.
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Also initialize the card and fill in STATION_ADDR with the station
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address. */
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int hp_probe(struct device *dev)
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{
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int *port, ports[] = {0x300, 0x320, 0x340, 0x280, 0x2C0, 0x200, 0x240, 0};
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short ioaddr = dev->base_addr;
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if (ioaddr > 0x1ff) /* Check a single specified location. */
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return hpprobe1(dev, ioaddr);
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else if (ioaddr > 0) /* Don't probe at all. */
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return ENXIO;
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for (port = &ports[0]; *port; port++) {
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if (check_region(*port, HP_IO_EXTENT))
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continue;
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if (hpprobe1(dev, *port) == 0) {
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return 0;
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}
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}
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return ENODEV;
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}
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int hpprobe1(struct device *dev, int ioaddr)
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{
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int status, i, board_id, wordmode;
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char *name;
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unsigned char *station_addr = dev->dev_addr;
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/* Check for the HP physical address, 08 00 09 xx xx xx. */
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if (inb(ioaddr) != 0x08
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|| inb(ioaddr+1) != 0x00
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|| inb(ioaddr+2) != 0x09)
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return ENODEV;
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/* This really isn't good enough, we may pick up HP LANCE boards also! */
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/* Verify that there is a 8390 at the expected location. */
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outb(E8390_NODMA + E8390_STOP, ioaddr);
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SLOW_DOWN_IO;
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status = inb(ioaddr);
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if (status != 0x21 && status != 0x23)
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return ENODEV;
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/* Set up the parameters based on the board ID.
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If you have additional mappings, please mail them to becker@super.org. */
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if ((board_id = inb(ioaddr + HP_ID)) & 0x80) {
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name = "HP27247";
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wordmode = 1;
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} else {
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name = "HP27250";
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wordmode = 0;
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}
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/* Grab the region so we can find another board if something fails. */
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snarf_region(ioaddr, HP_IO_EXTENT);
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printk("%s: %s (ID %02x) at %#3x,", dev->name, name, board_id, ioaddr);
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for(i = 0; i < ETHER_ADDR_LEN; i++)
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printk(" %2.2x", station_addr[i] = inb(ioaddr + i));
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/* Snarf the interrupt now. Someday this could be moved to open(). */
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if (dev->irq < 2) {
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int irq_16list[] = { 11, 10, 5, 3, 4, 7, 9, 0};
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int irq_8list[] = { 7, 5, 3, 4, 9, 0};
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int *irqp = wordmode ? irq_16list : irq_8list;
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do {
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int irq = *irqp;
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if (request_irq (irq, NULL) != -EBUSY) {
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autoirq_setup(0);
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/* Twinkle the interrupt, and check if it's seen. */
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outb_p(irqmap[irq] | HP_RUN, ioaddr + HP_CONFIGURE);
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outb_p( 0x00 | HP_RUN, ioaddr + HP_CONFIGURE);
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if (irq == autoirq_report(0) /* It's a good IRQ line! */
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&& request_irq (irq, &ei_interrupt) == 0) {
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printk(" selecting IRQ %d.\n", irq);
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dev->irq = *irqp;
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break;
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}
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}
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} while (*++irqp);
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if (*irqp == 0) {
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printk(" no free IRQ lines.\n");
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return EBUSY;
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}
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} else {
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if (dev->irq == 2)
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dev->irq = 9;
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if (irqaction(dev->irq, &ei_sigaction)) {
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printk (" unable to get IRQ %d.\n", dev->irq);
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return EBUSY;
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}
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}
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if (ei_debug > 1)
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printk(version);
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/* Set the base address to point to the NIC, not the "real" base! */
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dev->base_addr = ioaddr + NIC_OFFSET;
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ethdev_init(dev);
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ei_status.name = name;
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ei_status.word16 = wordmode;
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ei_status.tx_start_page = HP_START_PG;
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ei_status.rx_start_page = HP_START_PG + TX_PAGES;
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ei_status.stop_page = wordmode ? HP_16BSTOP_PG : HP_8BSTOP_PG;
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ei_status.reset_8390 = &hp_reset_8390;
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ei_status.block_input = &hp_block_input;
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ei_status.block_output = &hp_block_output;
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hp_init_card(dev);
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return 0;
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}
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static void
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hp_reset_8390(struct device *dev)
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{
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int hp_base = dev->base_addr - NIC_OFFSET;
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int saved_config = inb_p(hp_base + HP_CONFIGURE);
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int reset_start_time = jiffies;
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if (ei_debug > 1) printk("resetting the 8390 time=%d...", jiffies);
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outb_p(0x00, hp_base + HP_CONFIGURE);
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ei_status.txing = 0;
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sti();
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/* We shouldn't use the boguscount for timing, but this hasn't been
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checked yet, and you could hang your machine if jiffies break... */
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{
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int boguscount = 150000;
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while(jiffies - reset_start_time < 2)
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if (boguscount-- < 0) {
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printk("jiffy failure (t=%d)...", jiffies);
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break;
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}
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}
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outb_p(saved_config, hp_base + HP_CONFIGURE);
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while ((inb_p(hp_base+NIC_OFFSET+EN0_ISR) & ENISR_RESET) == 0)
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if (jiffies - reset_start_time > 2) {
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printk("%s: hp_reset_8390() did not complete.\n", dev->name);
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return;
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}
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if (ei_debug > 1) printk("8390 reset done (%d).", jiffies);
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}
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/* Block input and output, similar to the Crynwr packet driver. If you
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porting to a new ethercard look at the packet driver source for hints.
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The HP LAN doesn't use shared memory -- we put the packet
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out through the "remote DMA" dataport. */
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static int
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hp_block_input(struct device *dev, int count, char *buf, int ring_offset)
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{
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int nic_base = dev->base_addr;
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int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
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int xfer_count = count;
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outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
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outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
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outb_p(count & 0xff, nic_base + EN0_RCNTLO);
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outb_p(count >> 8, nic_base + EN0_RCNTHI);
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outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
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outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
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outb_p(E8390_RREAD+E8390_START, nic_base);
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if (ei_status.word16) {
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insw(nic_base - NIC_OFFSET + HP_DATAPORT,buf,count>>1);
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if (count & 0x01)
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buf[count-1] = inb(nic_base - NIC_OFFSET + HP_DATAPORT), xfer_count++;
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} else {
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insb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
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}
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/* This is for the ALPHA version only, remove for later releases. */
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if (ei_debug > 0) { /* DMA termination address check... */
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int high = inb_p(nic_base + EN0_RSARHI);
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int low = inb_p(nic_base + EN0_RSARLO);
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int addr = (high << 8) + low;
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/* Check only the lower 8 bits so we can ignore ring wrap. */
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if (((ring_offset + xfer_count) & 0xff) != (addr & 0xff))
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printk("%s: RX transfer address mismatch, %#4.4x vs. %#4.4x (actual).\n",
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dev->name, ring_offset + xfer_count, addr);
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}
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outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
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return ring_offset + count;
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}
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static void
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hp_block_output(struct device *dev, int count,
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const unsigned char *buf, const start_page)
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{
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int nic_base = dev->base_addr;
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int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
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outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
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/* Round the count up for word writes. Do we need to do this?
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What effect will an odd byte count have on the 8390?
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I should check someday. */
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if (ei_status.word16 && (count & 0x01))
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count++;
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/* We should already be in page 0, but to be safe... */
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outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base);
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#ifdef ei8390_bug
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/* Handle the read-before-write bug the same way as the
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Crynwr packet driver -- the NatSemi method doesn't work. */
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outb_p(0x42, nic_base + EN0_RCNTLO);
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outb_p(0, nic_base + EN0_RCNTHI);
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outb_p(0xff, nic_base + EN0_RSARLO);
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outb_p(0x00, nic_base + EN0_RSARHI);
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outb_p(E8390_RREAD+E8390_START, EN_CMD);
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/* Make certain that the dummy read has occured. */
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inb_p(0x61);
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inb_p(0x61);
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#endif
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outb_p(count & 0xff, nic_base + EN0_RCNTLO);
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outb_p(count >> 8, nic_base + EN0_RCNTHI);
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outb_p(0x00, nic_base + EN0_RSARLO);
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outb_p(start_page, nic_base + EN0_RSARHI);
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outb_p(E8390_RWRITE+E8390_START, nic_base);
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if (ei_status.word16) {
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/* Use the 'rep' sequence for 16 bit boards. */
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outsw(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count>>1);
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} else {
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outsb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
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}
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/* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here -- it's broken! */
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/* This is for the ALPHA version only, remove for later releases. */
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if (ei_debug > 0) { /* DMA termination address check... */
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int high = inb_p(nic_base + EN0_RSARHI);
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int low = inb_p(nic_base + EN0_RSARLO);
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int addr = (high << 8) + low;
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if ((start_page << 8) + count != addr)
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printk("%s: TX Transfer address mismatch, %#4.4x vs. %#4.4x.\n",
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dev->name, (start_page << 8) + count, addr);
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}
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outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
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return;
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}
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/* This function resets the ethercard if something screws up. */
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static void
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hp_init_card(struct device *dev)
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{
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int irq = dev->irq;
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NS8390_init(dev, 0);
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outb_p(irqmap[irq&0x0f] | HP_RUN,
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dev->base_addr - NIC_OFFSET + HP_CONFIGURE);
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return;
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}
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/*
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* Local variables:
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* compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c hp.c"
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* version-control: t
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* kept-new-versions: 5
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* tab-width: 4
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* End:
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*/
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