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|
/* hp.c: A HP LAN 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 the HP PC-LAN adaptors.
Sources:
The Crynwr packet driver.
*/
static const char version[] =
"hp.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/ioport.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <asm/system.h>
#include <asm/io.h>
#include "8390.h"
#define DRV_NAME "hp"
/* A zero-terminated list of I/O addresses to be probed. */
static unsigned int hppclan_portlist[] __initdata =
{ 0x300, 0x320, 0x340, 0x280, 0x2C0, 0x200, 0x240, 0};
#define HP_IO_EXTENT 32
#define HP_DATAPORT 0x0c /* "Remote DMA" data port. */
#define HP_ID 0x07
#define HP_CONFIGURE 0x08 /* Configuration register. */
#define HP_RUN 0x01 /* 1 == Run, 0 == reset. */
#define HP_IRQ 0x0E /* Mask for software-configured IRQ line. */
#define HP_DATAON 0x10 /* Turn on dataport */
#define NIC_OFFSET 0x10 /* Offset the 8390 registers. */
#define HP_START_PG 0x00 /* First page of TX buffer */
#define HP_8BSTOP_PG 0x80 /* Last page +1 of RX ring */
#define HP_16BSTOP_PG 0xFF /* Same, for 16 bit cards. */
static int hp_probe1(struct net_device *dev, int ioaddr);
static int hp_open(struct net_device *dev);
static int hp_close(struct net_device *dev);
static void hp_reset_8390(struct net_device *dev);
static void hp_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
int ring_page);
static void hp_block_input(struct net_device *dev, int count,
struct sk_buff *skb , int ring_offset);
static void hp_block_output(struct net_device *dev, int count,
const unsigned char *buf, int start_page);
static void hp_init_card(struct net_device *dev);
/* The map from IRQ number to HP_CONFIGURE register setting. */
/* My default is IRQ5 0 1 2 3 4 5 6 7 8 9 10 11 */
static char irqmap[16] __initdata= { 0, 0, 4, 6, 8,10, 0,14, 0, 4, 2,12,0,0,0,0};
/* Probe for an HP LAN adaptor.
Also initialize the card and fill in STATION_ADDR with the station
address. */
static int __init do_hp_probe(struct net_device *dev)
{
int i;
int base_addr = dev->base_addr;
int irq = dev->irq;
SET_MODULE_OWNER(dev);
if (base_addr > 0x1ff) /* Check a single specified location. */
return hp_probe1(dev, base_addr);
else if (base_addr != 0) /* Don't probe at all. */
return -ENXIO;
for (i = 0; hppclan_portlist[i]; i++) {
if (hp_probe1(dev, hppclan_portlist[i]) == 0)
return 0;
dev->irq = irq;
}
return -ENODEV;
}
#ifndef MODULE
struct net_device * __init hp_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_hp_probe(dev);
if (err)
goto out;
return dev;
out:
free_netdev(dev);
return ERR_PTR(err);
}
#endif
static int __init hp_probe1(struct net_device *dev, int ioaddr)
{
int i, retval, board_id, wordmode;
const char *name;
static unsigned version_printed;
if (!request_region(ioaddr, HP_IO_EXTENT, DRV_NAME))
return -EBUSY;
/* Check for the HP physical address, 08 00 09 xx xx xx. */
/* This really isn't good enough: we may pick up HP LANCE boards
also! Avoid the lance 0x5757 signature. */
if (inb(ioaddr) != 0x08
|| inb(ioaddr+1) != 0x00
|| inb(ioaddr+2) != 0x09
|| inb(ioaddr+14) == 0x57) {
retval = -ENODEV;
goto out;
}
/* Set up the parameters based on the board ID.
If you have additional mappings, please mail them to me -djb. */
if ((board_id = inb(ioaddr + HP_ID)) & 0x80) {
name = "HP27247";
wordmode = 1;
} else {
name = "HP27250";
wordmode = 0;
}
if (ei_debug && version_printed++ == 0)
printk(version);
printk("%s: %s (ID %02x) at %#3x,", dev->name, name, board_id, ioaddr);
for(i = 0; i < ETHER_ADDR_LEN; i++)
printk(" %2.2x", dev->dev_addr[i] = inb(ioaddr + i));
/* Snarf the interrupt now. Someday this could be moved to open(). */
if (dev->irq < 2) {
int irq_16list[] = { 11, 10, 5, 3, 4, 7, 9, 0};
int irq_8list[] = { 7, 5, 3, 4, 9, 0};
int *irqp = wordmode ? irq_16list : irq_8list;
do {
int irq = *irqp;
if (request_irq (irq, NULL, 0, "bogus", NULL) != -EBUSY) {
unsigned long cookie = probe_irq_on();
/* Twinkle the interrupt, and check if it's seen. */
outb_p(irqmap[irq] | HP_RUN, ioaddr + HP_CONFIGURE);
outb_p( 0x00 | HP_RUN, ioaddr + HP_CONFIGURE);
if (irq == probe_irq_off(cookie) /* It's a good IRQ line! */
&& request_irq (irq, ei_interrupt, 0, DRV_NAME, dev) == 0) {
printk(" selecting IRQ %d.\n", irq);
dev->irq = *irqp;
break;
}
}
} while (*++irqp);
if (*irqp == 0) {
printk(" no free IRQ lines.\n");
retval = -EBUSY;
goto out;
}
} else {
if (dev->irq == 2)
dev->irq = 9;
if ((retval = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev))) {
printk (" unable to get IRQ %d.\n", dev->irq);
goto out;
}
}
/* Set the base address to point to the NIC, not the "real" base! */
dev->base_addr = ioaddr + NIC_OFFSET;
dev->open = &hp_open;
dev->stop = &hp_close;
#ifdef CONFIG_NET_POLL_CONTROLLER
dev->poll_controller = ei_poll;
#endif
ei_status.name = name;
ei_status.word16 = wordmode;
ei_status.tx_start_page = HP_START_PG;
ei_status.rx_start_page = HP_START_PG + TX_PAGES;
ei_status.stop_page = wordmode ? HP_16BSTOP_PG : HP_8BSTOP_PG;
ei_status.reset_8390 = &hp_reset_8390;
ei_status.get_8390_hdr = &hp_get_8390_hdr;
ei_status.block_input = &hp_block_input;
ei_status.block_output = &hp_block_output;
hp_init_card(dev);
retval = register_netdev(dev);
if (retval)
goto out1;
return 0;
out1:
free_irq(dev->irq, dev);
out:
release_region(ioaddr, HP_IO_EXTENT);
return retval;
}
static int
hp_open(struct net_device *dev)
{
ei_open(dev);
return 0;
}
static int
hp_close(struct net_device *dev
|