465 строки
13 KiB
C
465 строки
13 KiB
C
/* 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;
|
||
}
|
||
|
||
static void cleanup_card(struct net_device *dev)
|
||
{
|
||
free_irq(dev->irq, dev);
|
||
release_region(dev->base_addr - NIC_OFFSET, HP_IO_EXTENT);
|
||
}
|
||
|
||
#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;
|
||
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 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);
|
||
|
||
return 0;
|
||
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)
|
||
{
|
||
ei_close(dev);
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
hp_reset_8390(struct net_device *dev)
|
||
{
|
||
int hp_base = dev->base_addr - NIC_OFFSET;
|
||
int saved_config = inb_p(hp_base + HP_CONFIGURE);
|
||
|
||
if (ei_debug > 1) printk("resetting the 8390 time=%ld...", jiffies);
|
||
outb_p(0x00, hp_base + HP_CONFIGURE);
|
||
ei_status.txing = 0;
|
||
/* Pause just a few cycles for the hardware reset to take place. */
|
||
udelay(5);
|
||
|
||
outb_p(saved_config, hp_base + HP_CONFIGURE);
|
||
udelay(5);
|
||
|
||
if ((inb_p(hp_base+NIC_OFFSET+EN0_ISR) & ENISR_RESET) == 0)
|
||
printk("%s: hp_reset_8390() did not complete.\n", dev->name);
|
||
|
||
if (ei_debug > 1) printk("8390 reset done (%ld).", jiffies);
|
||
return;
|
||
}
|
||
|
||
static void
|
||
hp_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
|
||
{
|
||
int nic_base = dev->base_addr;
|
||
int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
|
||
|
||
outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
|
||
outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
|
||
outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
|
||
outb_p(0, nic_base + EN0_RCNTHI);
|
||
outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
|
||
outb_p(ring_page, nic_base + EN0_RSARHI);
|
||
outb_p(E8390_RREAD+E8390_START, nic_base);
|
||
|
||
if (ei_status.word16)
|
||
insw(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
|
||
else
|
||
insb(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
|
||
|
||
outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
|
||
}
|
||
|
||
/* Block input and output, similar to the Crynwr packet driver. If you are
|
||
porting to a new ethercard look at the packet driver source for hints.
|
||
The HP LAN doesn't use shared memory -- we put the packet
|
||
out through the "remote DMA" dataport. */
|
||
|
||
static void
|
||
hp_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
|
||
{
|
||
int nic_base = dev->base_addr;
|
||
int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
|
||
int xfer_count = count;
|
||
char *buf = skb->data;
|
||
|
||
outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
|
||
outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
|
||
outb_p(count & 0xff, nic_base + EN0_RCNTLO);
|
||
outb_p(count >> 8, nic_base + EN0_RCNTHI);
|
||
outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
|
||
outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
|
||
outb_p(E8390_RREAD+E8390_START, nic_base);
|
||
if (ei_status.word16) {
|
||
insw(nic_base - NIC_OFFSET + HP_DATAPORT,buf,count>>1);
|
||
if (count & 0x01)
|
||
buf[count-1] = inb(nic_base - NIC_OFFSET + HP_DATAPORT), xfer_count++;
|
||
} else {
|
||
insb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
|
||
}
|
||
/* This is for the ALPHA version only, remove for later releases. */
|
||
if (ei_debug > 0) { /* DMA termination address check... */
|
||
int high = inb_p(nic_base + EN0_RSARHI);
|
||
int low = inb_p(nic_base + EN0_RSARLO);
|
||
int addr = (high << 8) + low;
|
||
/* Check only the lower 8 bits so we can ignore ring wrap. */
|
||
if (((ring_offset + xfer_count) & 0xff) != (addr & 0xff))
|
||
printk("%s: RX transfer address mismatch, %#4.4x vs. %#4.4x (actual).\n",
|
||
dev->name, ring_offset + xfer_count, addr);
|
||
}
|
||
outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
|
||
}
|
||
|
||
static void
|
||
hp_block_output(struct net_device *dev, int count,
|
||
const unsigned char *buf, int start_page)
|
||
{
|
||
int nic_base = dev->base_addr;
|
||
int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
|
||
|
||
outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
|
||
/* Round the count up for word writes. Do we need to do this?
|
||
What effect will an odd byte count have on the 8390?
|
||
I should check someday. */
|
||
if (ei_status.word16 && (count & 0x01))
|
||
count++;
|
||
/* We should already be in page 0, but to be safe... */
|
||
outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base);
|
||
|
||
#ifdef NE8390_RW_BUGFIX
|
||
/* Handle the read-before-write bug the same way as the
|
||
Crynwr packet driver -- the NatSemi method doesn't work. */
|
||
outb_p(0x42, nic_base + EN0_RCNTLO);
|
||
outb_p(0, nic_base + EN0_RCNTHI);
|
||
outb_p(0xff, nic_base + EN0_RSARLO);
|
||
outb_p(0x00, nic_base + EN0_RSARHI);
|
||
#define NE_CMD 0x00
|
||
outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
|
||
/* Make certain that the dummy read has occurred. */
|
||
inb_p(0x61);
|
||
inb_p(0x61);
|
||
#endif
|
||
|
||
outb_p(count & 0xff, nic_base + EN0_RCNTLO);
|
||
outb_p(count >> 8, nic_base + EN0_RCNTHI);
|
||
outb_p(0x00, nic_base + EN0_RSARLO);
|
||
outb_p(start_page, nic_base + EN0_RSARHI);
|
||
|
||
outb_p(E8390_RWRITE+E8390_START, nic_base);
|
||
if (ei_status.word16) {
|
||
/* Use the 'rep' sequence for 16 bit boards. */
|
||
outsw(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count>>1);
|
||
} else {
|
||
outsb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
|
||
}
|
||
|
||
/* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here -- it's broken! */
|
||
|
||
/* This is for the ALPHA version only, remove for later releases. */
|
||
if (ei_debug > 0) { /* DMA termination address check... */
|
||
int high = inb_p(nic_base + EN0_RSARHI);
|
||
int low = inb_p(nic_base + EN0_RSARLO);
|
||
int addr = (high << 8) + low;
|
||
if ((start_page << 8) + count != addr)
|
||
printk("%s: TX Transfer address mismatch, %#4.4x vs. %#4.4x.\n",
|
||
dev->name, (start_page << 8) + count, addr);
|
||
}
|
||
outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
|
||
return;
|
||
}
|
||
|
||
/* This function resets the ethercard if something screws up. */
|
||
static void
|
||
hp_init_card(struct net_device *dev)
|
||
{
|
||
int irq = dev->irq;
|
||
NS8390_init(dev, 0);
|
||
outb_p(irqmap[irq&0x0f] | HP_RUN,
|
||
dev->base_addr - NIC_OFFSET + HP_CONFIGURE);
|
||
return;
|
||
}
|
||
|
||
#ifdef MODULE
|
||
#define MAX_HP_CARDS 4 /* Max number of HP cards per module */
|
||
static struct net_device *dev_hp[MAX_HP_CARDS];
|
||
static int io[MAX_HP_CARDS];
|
||
static int irq[MAX_HP_CARDS];
|
||
|
||
module_param_array(io, int, NULL, 0);
|
||
module_param_array(irq, int, NULL, 0);
|
||
MODULE_PARM_DESC(io, "I/O base address(es)");
|
||
MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
|
||
MODULE_DESCRIPTION("HP PC-LAN ISA 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_HP_CARDS; this_dev++) {
|
||
if (io[this_dev] == 0) {
|
||
if (this_dev != 0) break; /* only autoprobe 1st one */
|
||
printk(KERN_NOTICE "hp.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];
|
||
if (do_hp_probe(dev) == 0) {
|
||
if (register_netdev(dev) == 0) {
|
||
dev_hp[found++] = dev;
|
||
continue;
|
||
}
|
||
cleanup_card(dev);
|
||
}
|
||
free_netdev(dev);
|
||
printk(KERN_WARNING "hp.c: No HP 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_HP_CARDS; this_dev++) {
|
||
struct net_device *dev = dev_hp[this_dev];
|
||
if (dev) {
|
||
unregister_netdev(dev);
|
||
cleanup_card(dev);
|
||
free_netdev(dev);
|
||
}
|
||
}
|
||
}
|
||
#endif /* MODULE */
|