![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
425 lines
11 KiB
C
425 lines
11 KiB
C
/* ac3200.c: A driver for the Ansel Communications EISA ethernet adaptor. */
|
||
/*
|
||
Written 1993, 1994 by Donald Becker.
|
||
Copyright 1993 United States Government as represented by the Director,
|
||
National Security Agency. This software may only be used and distributed
|
||
according to the terms of the GNU General Public License as modified by SRC,
|
||
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 driver for the Ansel Communications Model 3200 EISA Ethernet LAN
|
||
Adapter. The programming information is from the users manual, as related
|
||
by glee@ardnassak.math.clemson.edu.
|
||
|
||
Changelog:
|
||
|
||
Paul Gortmaker 05/98 : add support for shared mem above 1MB.
|
||
|
||
*/
|
||
|
||
static const char version[] =
|
||
"ac3200.c:v1.01 7/1/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
|
||
|
||
#include <linux/module.h>
|
||
#include <linux/eisa.h>
|
||
#include <linux/kernel.h>
|
||
#include <linux/errno.h>
|
||
#include <linux/string.h>
|
||
#include <linux/netdevice.h>
|
||
#include <linux/etherdevice.h>
|
||
#include <linux/init.h>
|
||
|
||
#include <asm/system.h>
|
||
#include <asm/io.h>
|
||
#include <asm/irq.h>
|
||
|
||
#include "8390.h"
|
||
|
||
#define DRV_NAME "ac3200"
|
||
|
||
/* Offsets from the base address. */
|
||
#define AC_NIC_BASE 0x00
|
||
#define AC_SA_PROM 0x16 /* The station address PROM. */
|
||
#define AC_ADDR0 0x00 /* Prefix station address values. */
|
||
#define AC_ADDR1 0x40
|
||
#define AC_ADDR2 0x90
|
||
#define AC_ID_PORT 0xC80
|
||
#define AC_EISA_ID 0x0110d305
|
||
#define AC_RESET_PORT 0xC84
|
||
#define AC_RESET 0x00
|
||
#define AC_ENABLE 0x01
|
||
#define AC_CONFIG 0xC90 /* The configuration port. */
|
||
|
||
#define AC_IO_EXTENT 0x20
|
||
/* Actually accessed is:
|
||
* AC_NIC_BASE (0-15)
|
||
* AC_SA_PROM (0-5)
|
||
* AC_ID_PORT (0-3)
|
||
* AC_RESET_PORT
|
||
* AC_CONFIG
|
||
*/
|
||
|
||
/* Decoding of the configuration register. */
|
||
static unsigned char config2irqmap[8] __initdata = {15, 12, 11, 10, 9, 7, 5, 3};
|
||
static int addrmap[8] =
|
||
{0xFF0000, 0xFE0000, 0xFD0000, 0xFFF0000, 0xFFE0000, 0xFFC0000, 0xD0000, 0 };
|
||
static const char *port_name[4] = { "10baseT", "invalid", "AUI", "10base2"};
|
||
|
||
#define config2irq(configval) config2irqmap[((configval) >> 3) & 7]
|
||
#define config2mem(configval) addrmap[(configval) & 7]
|
||
#define config2name(configval) port_name[((configval) >> 6) & 3]
|
||
|
||
/* First and last 8390 pages. */
|
||
#define AC_START_PG 0x00 /* First page of 8390 TX buffer */
|
||
#define AC_STOP_PG 0x80 /* Last page +1 of the 8390 RX ring */
|
||
|
||
static int ac_probe1(int ioaddr, struct net_device *dev);
|
||
|
||
static int ac_open(struct net_device *dev);
|
||
static void ac_reset_8390(struct net_device *dev);
|
||
static void ac_block_input(struct net_device *dev, int count,
|
||
struct sk_buff *skb, int ring_offset);
|
||
static void ac_block_output(struct net_device *dev, const int count,
|
||
const unsigned char *buf, const int start_page);
|
||
static void ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
|
||
int ring_page);
|
||
|
||
static int ac_close_card(struct net_device *dev);
|
||
|
||
|
||
/* Probe for the AC3200.
|
||
|
||
The AC3200 can be identified by either the EISA configuration registers,
|
||
or the unique value in the station address PROM.
|
||
*/
|
||
|
||
static int __init do_ac3200_probe(struct net_device *dev)
|
||
{
|
||
unsigned short ioaddr = dev->base_addr;
|
||
int irq = dev->irq;
|
||
int mem_start = dev->mem_start;
|
||
|
||
SET_MODULE_OWNER(dev);
|
||
|
||
if (ioaddr > 0x1ff) /* Check a single specified location. */
|
||
return ac_probe1(ioaddr, dev);
|
||
else if (ioaddr > 0) /* Don't probe at all. */
|
||
return -ENXIO;
|
||
|
||
if ( ! EISA_bus)
|
||
return -ENXIO;
|
||
|
||
for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) {
|
||
if (ac_probe1(ioaddr, dev) == 0)
|
||
return 0;
|
||
dev->irq = irq;
|
||
dev->mem_start = mem_start;
|
||
}
|
||
|
||
return -ENODEV;
|
||
}
|
||
|
||
static void cleanup_card(struct net_device *dev)
|
||
{
|
||
/* Someday free_irq may be in ac_close_card() */
|
||
free_irq(dev->irq, dev);
|
||
release_region(dev->base_addr, AC_IO_EXTENT);
|
||
iounmap(ei_status.mem);
|
||
}
|
||
|
||
#ifndef MODULE
|
||
struct net_device * __init ac3200_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_ac3200_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 ac_probe1(int ioaddr, struct net_device *dev)
|
||
{
|
||
int i, retval;
|
||
|
||
if (!request_region(ioaddr, AC_IO_EXTENT, DRV_NAME))
|
||
return -EBUSY;
|
||
|
||
if (inb_p(ioaddr + AC_ID_PORT) == 0xff) {
|
||
retval = -ENODEV;
|
||
goto out;
|
||
}
|
||
|
||
if (inl(ioaddr + AC_ID_PORT) != AC_EISA_ID) {
|
||
retval = -ENODEV;
|
||
goto out;
|
||
}
|
||
|
||
#ifndef final_version
|
||
printk(KERN_DEBUG "AC3200 ethercard configuration register is %#02x,"
|
||
" EISA ID %02x %02x %02x %02x.\n", inb(ioaddr + AC_CONFIG),
|
||
inb(ioaddr + AC_ID_PORT + 0), inb(ioaddr + AC_ID_PORT + 1),
|
||
inb(ioaddr + AC_ID_PORT + 2), inb(ioaddr + AC_ID_PORT + 3));
|
||
#endif
|
||
|
||
printk("AC3200 in EISA slot %d, node", ioaddr/0x1000);
|
||
for(i = 0; i < 6; i++)
|
||
printk(" %02x", dev->dev_addr[i] = inb(ioaddr + AC_SA_PROM + i));
|
||
|
||
#if 0
|
||
/* Check the vendor ID/prefix. Redundant after checking the EISA ID */
|
||
if (inb(ioaddr + AC_SA_PROM + 0) != AC_ADDR0
|
||
|| inb(ioaddr + AC_SA_PROM + 1) != AC_ADDR1
|
||
|| inb(ioaddr + AC_SA_PROM + 2) != AC_ADDR2 ) {
|
||
printk(", not found (invalid prefix).\n");
|
||
retval = -ENODEV;
|
||
goto out;
|
||
}
|
||
#endif
|
||
|
||
/* Assign and allocate the interrupt now. */
|
||
if (dev->irq == 0) {
|
||
dev->irq = config2irq(inb(ioaddr + AC_CONFIG));
|
||
printk(", using");
|
||
} else {
|
||
dev->irq = irq_canonicalize(dev->irq);
|
||
printk(", assigning");
|
||
}
|
||
|
||
retval = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev);
|
||
if (retval) {
|
||
printk (" nothing! Unable to get IRQ %d.\n", dev->irq);
|
||
goto out1;
|
||
}
|
||
|
||
printk(" IRQ %d, %s port\n", dev->irq, port_name[dev->if_port]);
|
||
|
||
dev->base_addr = ioaddr;
|
||
|
||
#ifdef notyet
|
||
if (dev->mem_start) { /* Override the value from the board. */
|
||
for (i = 0; i < 7; i++)
|
||
if (addrmap[i] == dev->mem_start)
|
||
break;
|
||
if (i >= 7)
|
||
i = 0;
|
||
outb((inb(ioaddr + AC_CONFIG) & ~7) | i, ioaddr + AC_CONFIG);
|
||
}
|
||
#endif
|
||
|
||
dev->if_port = inb(ioaddr + AC_CONFIG) >> 6;
|
||
dev->mem_start = config2mem(inb(ioaddr + AC_CONFIG));
|
||
|
||
printk("%s: AC3200 at %#3x with %dkB memory at physical address %#lx.\n",
|
||
dev->name, ioaddr, AC_STOP_PG/4, dev->mem_start);
|
||
|
||
/*
|
||
* BEWARE!! Some dain-bramaged EISA SCUs will allow you to put
|
||
* the card mem within the region covered by `normal' RAM !!!
|
||
*
|
||
* ioremap() will fail in that case.
|
||
*/
|
||
ei_status.mem = ioremap(dev->mem_start, AC_STOP_PG*0x100);
|
||
if (!ei_status.mem) {
|
||
printk(KERN_ERR "ac3200.c: Unable to remap card memory above 1MB !!\n");
|
||
printk(KERN_ERR "ac3200.c: Try using EISA SCU to set memory below 1MB.\n");
|
||
printk(KERN_ERR "ac3200.c: Driver NOT installed.\n");
|
||
retval = -EINVAL;
|
||
goto out1;
|
||
}
|
||
printk("ac3200.c: remapped %dkB card memory to virtual address %p\n",
|
||
AC_STOP_PG/4, ei_status.mem);
|
||
|
||
dev->mem_start = (unsigned long)ei_status.mem;
|
||
dev->mem_end = dev->mem_start + (AC_STOP_PG - AC_START_PG)*256;
|
||
|
||
ei_status.name = "AC3200";
|
||
ei_status.tx_start_page = AC_START_PG;
|
||
ei_status.rx_start_page = AC_START_PG + TX_PAGES;
|
||
ei_status.stop_page = AC_STOP_PG;
|
||
ei_status.word16 = 1;
|
||
|
||
if (ei_debug > 0)
|
||
printk(version);
|
||
|
||
ei_status.reset_8390 = &ac_reset_8390;
|
||
ei_status.block_input = &ac_block_input;
|
||
ei_status.block_output = &ac_block_output;
|
||
ei_status.get_8390_hdr = &ac_get_8390_hdr;
|
||
|
||
dev->open = &ac_open;
|
||
dev->stop = &ac_close_card;
|
||
#ifdef CONFIG_NET_POLL_CONTROLLER
|
||
dev->poll_controller = ei_poll;
|
||
#endif
|
||
NS8390_init(dev, 0);
|
||
return 0;
|
||
out1:
|
||
free_irq(dev->irq, dev);
|
||
out:
|
||
release_region(ioaddr, AC_IO_EXTENT);
|
||
return retval;
|
||
}
|
||
|
||
static int ac_open(struct net_device *dev)
|
||
{
|
||
#ifdef notyet
|
||
/* Someday we may enable the IRQ and shared memory here. */
|
||
int ioaddr = dev->base_addr;
|
||
#endif
|
||
|
||
ei_open(dev);
|
||
return 0;
|
||
}
|
||
|
||
static void ac_reset_8390(struct net_device *dev)
|
||
{
|
||
ushort ioaddr = dev->base_addr;
|
||
|
||
outb(AC_RESET, ioaddr + AC_RESET_PORT);
|
||
if (ei_debug > 1) printk("resetting AC3200, t=%ld...", jiffies);
|
||
|
||
ei_status.txing = 0;
|
||
outb(AC_ENABLE, ioaddr + AC_RESET_PORT);
|
||
if (ei_debug > 1) printk("reset done\n");
|
||
|
||
return;
|
||
}
|
||
|
||
/* Grab the 8390 specific header. Similar to the block_input routine, but
|
||
we don't need to be concerned with ring wrap as the header will be at
|
||
the start of a page, so we optimize accordingly. */
|
||
|
||
static void
|
||
ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
|
||
{
|
||
void __iomem *hdr_start = ei_status.mem + ((ring_page - AC_START_PG)<<8);
|
||
memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
|
||
}
|
||
|
||
/* Block input and output are easy on shared memory ethercards, the only
|
||
complication is when the ring buffer wraps. */
|
||
|
||
static void ac_block_input(struct net_device *dev, int count, struct sk_buff *skb,
|
||
int ring_offset)
|
||
{
|
||
void __iomem *start = ei_status.mem + ring_offset - AC_START_PG*256;
|
||
|
||
if (ring_offset + count > AC_STOP_PG*256) {
|
||
/* We must wrap the input move. */
|
||
int semi_count = AC_STOP_PG*256 - ring_offset;
|
||
memcpy_fromio(skb->data, start, semi_count);
|
||
count -= semi_count;
|
||
memcpy_fromio(skb->data + semi_count,
|
||
ei_status.mem + TX_PAGES*256, count);
|
||
} else {
|
||
/* Packet is in one chunk -- we can copy + cksum. */
|
||
eth_io_copy_and_sum(skb, start, count, 0);
|
||
}
|
||
}
|
||
|
||
static void ac_block_output(struct net_device *dev, int count,
|
||
const unsigned char *buf, int start_page)
|
||
{
|
||
void __iomem *shmem = ei_status.mem + ((start_page - AC_START_PG)<<8);
|
||
|
||
memcpy_toio(shmem, buf, count);
|
||
}
|
||
|
||
static int ac_close_card(struct net_device *dev)
|
||
{
|
||
if (ei_debug > 1)
|
||
printk("%s: Shutting down ethercard.\n", dev->name);
|
||
|
||
#ifdef notyet
|
||
/* We should someday disable shared memory and interrupts. */
|
||
outb(0x00, ioaddr + 6); /* Disable interrupts. */
|
||
free_irq(dev->irq, dev);
|
||
#endif
|
||
|
||
ei_close(dev);
|
||
return 0;
|
||
}
|
||
|
||
#ifdef MODULE
|
||
#define MAX_AC32_CARDS 4 /* Max number of AC32 cards per module */
|
||
static struct net_device *dev_ac32[MAX_AC32_CARDS];
|
||
static int io[MAX_AC32_CARDS];
|
||
static int irq[MAX_AC32_CARDS];
|
||
static int mem[MAX_AC32_CARDS];
|
||
module_param_array(io, int, NULL, 0);
|
||
module_param_array(irq, int, NULL, 0);
|
||
module_param_array(mem, int, NULL, 0);
|
||
MODULE_PARM_DESC(io, "I/O base address(es)");
|
||
MODULE_PARM_DESC(irq, "IRQ number(s)");
|
||
MODULE_PARM_DESC(mem, "Memory base address(es)");
|
||
MODULE_DESCRIPTION("Ansel AC3200 EISA ethernet driver");
|
||
MODULE_LICENSE("GPL");
|
||
|
||
int
|
||
init_module(void)
|
||
{
|
||
struct net_device *dev;
|
||
int this_dev, found = 0;
|
||
|
||
for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
|
||
if (io[this_dev] == 0 && this_dev != 0)
|
||
break;
|
||
dev = alloc_ei_netdev();
|
||
if (!dev)
|
||
break;
|
||
dev->irq = irq[this_dev];
|
||
dev->base_addr = io[this_dev];
|
||
dev->mem_start = mem[this_dev]; /* Currently ignored by driver */
|
||
if (do_ac3200_probe(dev) == 0) {
|
||
if (register_netdev(dev) == 0) {
|
||
dev_ac32[found++] = dev;
|
||
continue;
|
||
}
|
||
cleanup_card(dev);
|
||
}
|
||
free_netdev(dev);
|
||
printk(KERN_WARNING "ac3200.c: No ac3200 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_AC32_CARDS; this_dev++) {
|
||
struct net_device *dev = dev_ac32[this_dev];
|
||
if (dev) {
|
||
unregister_netdev(dev);
|
||
cleanup_card(dev);
|
||
free_netdev(dev);
|
||
}
|
||
}
|
||
}
|
||
#endif /* MODULE */
|