425 lines
12 KiB
C
425 lines
12 KiB
C
/*
|
|
* Linux ARCnet driver - COM90xx chipset (IO-mapped buffers)
|
|
*
|
|
* Written 1997 by David Woodhouse.
|
|
* Written 1994-1999 by Avery Pennarun.
|
|
* Written 1999-2000 by Martin Mares <mj@ucw.cz>.
|
|
* Derived from skeleton.c by Donald Becker.
|
|
*
|
|
* Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
|
|
* for sponsoring the further development of this driver.
|
|
*
|
|
* **********************
|
|
*
|
|
* The original copyright of skeleton.c was as follows:
|
|
*
|
|
* skeleton.c Written 1993 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.
|
|
*
|
|
* **********************
|
|
*
|
|
* For more details, see drivers/net/arcnet.c
|
|
*
|
|
* **********************
|
|
*/
|
|
|
|
#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/io.h>
|
|
|
|
#include "arcdevice.h"
|
|
#include "com9026.h"
|
|
|
|
/* Internal function declarations */
|
|
|
|
static int com90io_found(struct net_device *dev);
|
|
static void com90io_command(struct net_device *dev, int command);
|
|
static int com90io_status(struct net_device *dev);
|
|
static void com90io_setmask(struct net_device *dev, int mask);
|
|
static int com90io_reset(struct net_device *dev, int really_reset);
|
|
static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset,
|
|
void *buf, int count);
|
|
static void com90io_copy_from_card(struct net_device *dev, int bufnum,
|
|
int offset, void *buf, int count);
|
|
|
|
/* Handy defines for ARCnet specific stuff */
|
|
|
|
/* The number of low I/O ports used by the card. */
|
|
#define ARCNET_TOTAL_SIZE 16
|
|
|
|
/****************************************************************************
|
|
* *
|
|
* IO-mapped operation routines *
|
|
* *
|
|
****************************************************************************/
|
|
|
|
#undef ONE_AT_A_TIME_TX
|
|
#undef ONE_AT_A_TIME_RX
|
|
|
|
static u_char get_buffer_byte(struct net_device *dev, unsigned offset)
|
|
{
|
|
int ioaddr = dev->base_addr;
|
|
|
|
arcnet_outb(offset >> 8, ioaddr, COM9026_REG_W_ADDR_HI);
|
|
arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);
|
|
|
|
return arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
|
|
}
|
|
|
|
#ifdef ONE_AT_A_TIME_TX
|
|
static void put_buffer_byte(struct net_device *dev, unsigned offset,
|
|
u_char datum)
|
|
{
|
|
int ioaddr = dev->base_addr;
|
|
|
|
arcnet_outb(offset >> 8, ioaddr, COM9026_REG_W_ADDR_HI);
|
|
arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);
|
|
|
|
arcnet_outb(datum, ioaddr, COM9026_REG_RW_MEMDATA);
|
|
}
|
|
|
|
#endif
|
|
|
|
static void get_whole_buffer(struct net_device *dev, unsigned offset,
|
|
unsigned length, char *dest)
|
|
{
|
|
int ioaddr = dev->base_addr;
|
|
|
|
arcnet_outb((offset >> 8) | AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
|
|
arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);
|
|
|
|
while (length--)
|
|
#ifdef ONE_AT_A_TIME_RX
|
|
*(dest++) = get_buffer_byte(dev, offset++);
|
|
#else
|
|
*(dest++) = arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
|
|
#endif
|
|
}
|
|
|
|
static void put_whole_buffer(struct net_device *dev, unsigned offset,
|
|
unsigned length, char *dest)
|
|
{
|
|
int ioaddr = dev->base_addr;
|
|
|
|
arcnet_outb((offset >> 8) | AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
|
|
arcnet_outb(offset & 0xff, ioaddr,COM9026_REG_W_ADDR_LO);
|
|
|
|
while (length--)
|
|
#ifdef ONE_AT_A_TIME_TX
|
|
put_buffer_byte(dev, offset++, *(dest++));
|
|
#else
|
|
arcnet_outb(*(dest++), ioaddr, COM9026_REG_RW_MEMDATA);
|
|
#endif
|
|
}
|
|
|
|
/* We cannot probe for an IO mapped card either, although we can check that
|
|
* it's where we were told it was, and even autoirq
|
|
*/
|
|
static int __init com90io_probe(struct net_device *dev)
|
|
{
|
|
int ioaddr = dev->base_addr, status;
|
|
unsigned long airqmask;
|
|
|
|
if (BUGLVL(D_NORMAL)) {
|
|
pr_info("%s\n", "COM90xx IO-mapped mode support (by David Woodhouse et el.)");
|
|
pr_info("E-mail me if you actually test this driver, please!\n");
|
|
}
|
|
|
|
if (!ioaddr) {
|
|
arc_printk(D_NORMAL, dev, "No autoprobe for IO mapped cards; you must specify the base address!\n");
|
|
return -ENODEV;
|
|
}
|
|
if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "com90io probe")) {
|
|
arc_printk(D_INIT_REASONS, dev, "IO request_region %x-%x failed\n",
|
|
ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
|
|
return -ENXIO;
|
|
}
|
|
if (arcnet_inb(ioaddr, COM9026_REG_R_STATUS) == 0xFF) {
|
|
arc_printk(D_INIT_REASONS, dev, "IO address %x empty\n",
|
|
ioaddr);
|
|
goto err_out;
|
|
}
|
|
arcnet_inb(ioaddr, COM9026_REG_R_RESET);
|
|
mdelay(RESETtime);
|
|
|
|
status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
|
|
|
|
if ((status & 0x9D) != (NORXflag | RECONflag | TXFREEflag | RESETflag)) {
|
|
arc_printk(D_INIT_REASONS, dev, "Status invalid (%Xh)\n",
|
|
status);
|
|
goto err_out;
|
|
}
|
|
arc_printk(D_INIT_REASONS, dev, "Status after reset: %X\n", status);
|
|
|
|
arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear,
|
|
ioaddr, COM9026_REG_W_COMMAND);
|
|
|
|
arc_printk(D_INIT_REASONS, dev, "Status after reset acknowledged: %X\n",
|
|
status);
|
|
|
|
status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
|
|
|
|
if (status & RESETflag) {
|
|
arc_printk(D_INIT_REASONS, dev, "Eternal reset (status=%Xh)\n",
|
|
status);
|
|
goto err_out;
|
|
}
|
|
arcnet_outb((0x16 | IOMAPflag) & ~ENABLE16flag,
|
|
ioaddr, COM9026_REG_RW_CONFIG);
|
|
|
|
/* Read first loc'n of memory */
|
|
|
|
arcnet_outb(AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
|
|
arcnet_outb(0, ioaddr, COM9026_REG_W_ADDR_LO);
|
|
|
|
status = arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
|
|
if (status != 0xd1) {
|
|
arc_printk(D_INIT_REASONS, dev, "Signature byte not found (%Xh instead).\n",
|
|
status);
|
|
goto err_out;
|
|
}
|
|
if (!dev->irq) {
|
|
/* if we do this, we're sure to get an IRQ since the
|
|
* card has just reset and the NORXflag is on until
|
|
* we tell it to start receiving.
|
|
*/
|
|
|
|
airqmask = probe_irq_on();
|
|
arcnet_outb(NORXflag, ioaddr, COM9026_REG_W_INTMASK);
|
|
udelay(1);
|
|
arcnet_outb(0, ioaddr, COM9026_REG_W_INTMASK);
|
|
dev->irq = probe_irq_off(airqmask);
|
|
|
|
if ((int)dev->irq <= 0) {
|
|
arc_printk(D_INIT_REASONS, dev, "Autoprobe IRQ failed\n");
|
|
goto err_out;
|
|
}
|
|
}
|
|
release_region(ioaddr, ARCNET_TOTAL_SIZE); /* end of probing */
|
|
return com90io_found(dev);
|
|
|
|
err_out:
|
|
release_region(ioaddr, ARCNET_TOTAL_SIZE);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Set up the struct net_device associated with this card. Called after
|
|
* probing succeeds.
|
|
*/
|
|
static int __init com90io_found(struct net_device *dev)
|
|
{
|
|
struct arcnet_local *lp;
|
|
int ioaddr = dev->base_addr;
|
|
int err;
|
|
|
|
/* Reserve the irq */
|
|
if (request_irq(dev->irq, arcnet_interrupt, 0,
|
|
"arcnet (COM90xx-IO)", dev)) {
|
|
arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
|
|
return -ENODEV;
|
|
}
|
|
/* Reserve the I/O region */
|
|
if (!request_region(dev->base_addr, ARCNET_TOTAL_SIZE,
|
|
"arcnet (COM90xx-IO)")) {
|
|
free_irq(dev->irq, dev);
|
|
return -EBUSY;
|
|
}
|
|
|
|
lp = netdev_priv(dev);
|
|
lp->card_name = "COM90xx I/O";
|
|
lp->hw.command = com90io_command;
|
|
lp->hw.status = com90io_status;
|
|
lp->hw.intmask = com90io_setmask;
|
|
lp->hw.reset = com90io_reset;
|
|
lp->hw.owner = THIS_MODULE;
|
|
lp->hw.copy_to_card = com90io_copy_to_card;
|
|
lp->hw.copy_from_card = com90io_copy_from_card;
|
|
|
|
lp->config = (0x16 | IOMAPflag) & ~ENABLE16flag;
|
|
arcnet_outb(lp->config, ioaddr, COM9026_REG_RW_CONFIG);
|
|
|
|
/* get and check the station ID from offset 1 in shmem */
|
|
|
|
dev->dev_addr[0] = get_buffer_byte(dev, 1);
|
|
|
|
err = register_netdev(dev);
|
|
if (err) {
|
|
arcnet_outb(arcnet_inb(ioaddr, COM9026_REG_RW_CONFIG) & ~IOMAPflag,
|
|
ioaddr, COM9026_REG_RW_CONFIG);
|
|
free_irq(dev->irq, dev);
|
|
release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
|
|
return err;
|
|
}
|
|
|
|
arc_printk(D_NORMAL, dev, "COM90IO: station %02Xh found at %03lXh, IRQ %d.\n",
|
|
dev->dev_addr[0], dev->base_addr, dev->irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Do a hardware reset on the card, and set up necessary registers.
|
|
*
|
|
* This should be called as little as possible, because it disrupts the
|
|
* token on the network (causes a RECON) and requires a significant delay.
|
|
*
|
|
* However, it does make sure the card is in a defined state.
|
|
*/
|
|
static int com90io_reset(struct net_device *dev, int really_reset)
|
|
{
|
|
struct arcnet_local *lp = netdev_priv(dev);
|
|
short ioaddr = dev->base_addr;
|
|
|
|
arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
|
|
dev->name, arcnet_inb(ioaddr, COM9026_REG_R_STATUS));
|
|
|
|
if (really_reset) {
|
|
/* reset the card */
|
|
arcnet_inb(ioaddr, COM9026_REG_R_RESET);
|
|
mdelay(RESETtime);
|
|
}
|
|
/* Set the thing to IO-mapped, 8-bit mode */
|
|
lp->config = (0x1C | IOMAPflag) & ~ENABLE16flag;
|
|
arcnet_outb(lp->config, ioaddr, COM9026_REG_RW_CONFIG);
|
|
|
|
arcnet_outb(CFLAGScmd | RESETclear, ioaddr, COM9026_REG_W_COMMAND);
|
|
/* clear flags & end reset */
|
|
arcnet_outb(CFLAGScmd | CONFIGclear, ioaddr, COM9026_REG_W_COMMAND);
|
|
|
|
/* verify that the ARCnet signature byte is present */
|
|
if (get_buffer_byte(dev, 0) != TESTvalue) {
|
|
arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n");
|
|
return 1;
|
|
}
|
|
/* enable extended (512-byte) packets */
|
|
arcnet_outb(CONFIGcmd | EXTconf, ioaddr, COM9026_REG_W_COMMAND);
|
|
/* done! return success. */
|
|
return 0;
|
|
}
|
|
|
|
static void com90io_command(struct net_device *dev, int cmd)
|
|
{
|
|
short ioaddr = dev->base_addr;
|
|
|
|
arcnet_outb(cmd, ioaddr, COM9026_REG_W_COMMAND);
|
|
}
|
|
|
|
static int com90io_status(struct net_device *dev)
|
|
{
|
|
short ioaddr = dev->base_addr;
|
|
|
|
return arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
|
|
}
|
|
|
|
static void com90io_setmask(struct net_device *dev, int mask)
|
|
{
|
|
short ioaddr = dev->base_addr;
|
|
|
|
arcnet_outb(mask, ioaddr, COM9026_REG_W_INTMASK);
|
|
}
|
|
|
|
static void com90io_copy_to_card(struct net_device *dev, int bufnum,
|
|
int offset, void *buf, int count)
|
|
{
|
|
TIME(dev, "put_whole_buffer", count,
|
|
put_whole_buffer(dev, bufnum * 512 + offset, count, buf));
|
|
}
|
|
|
|
static void com90io_copy_from_card(struct net_device *dev, int bufnum,
|
|
int offset, void *buf, int count)
|
|
{
|
|
TIME(dev, "get_whole_buffer", count,
|
|
get_whole_buffer(dev, bufnum * 512 + offset, count, buf));
|
|
}
|
|
|
|
static int io; /* use the insmod io= irq= shmem= options */
|
|
static int irq;
|
|
static char device[9]; /* use eg. device=arc1 to change name */
|
|
|
|
module_param(io, int, 0);
|
|
module_param(irq, int, 0);
|
|
module_param_string(device, device, sizeof(device), 0);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#ifndef MODULE
|
|
static int __init com90io_setup(char *s)
|
|
{
|
|
int ints[4];
|
|
|
|
s = get_options(s, 4, ints);
|
|
if (!ints[0])
|
|
return 0;
|
|
switch (ints[0]) {
|
|
default: /* ERROR */
|
|
pr_err("Too many arguments\n");
|
|
case 2: /* IRQ */
|
|
irq = ints[2];
|
|
case 1: /* IO address */
|
|
io = ints[1];
|
|
}
|
|
if (*s)
|
|
snprintf(device, sizeof(device), "%s", s);
|
|
return 1;
|
|
}
|
|
__setup("com90io=", com90io_setup);
|
|
#endif
|
|
|
|
static struct net_device *my_dev;
|
|
|
|
static int __init com90io_init(void)
|
|
{
|
|
struct net_device *dev;
|
|
int err;
|
|
|
|
dev = alloc_arcdev(device);
|
|
if (!dev)
|
|
return -ENOMEM;
|
|
|
|
dev->base_addr = io;
|
|
dev->irq = irq;
|
|
if (dev->irq == 2)
|
|
dev->irq = 9;
|
|
|
|
err = com90io_probe(dev);
|
|
|
|
if (err) {
|
|
free_netdev(dev);
|
|
return err;
|
|
}
|
|
|
|
my_dev = dev;
|
|
return 0;
|
|
}
|
|
|
|
static void __exit com90io_exit(void)
|
|
{
|
|
struct net_device *dev = my_dev;
|
|
int ioaddr = dev->base_addr;
|
|
|
|
unregister_netdev(dev);
|
|
|
|
/* In case the old driver is loaded later,
|
|
* set the thing back to MMAP mode
|
|
*/
|
|
arcnet_outb(arcnet_inb(ioaddr, COM9026_REG_RW_CONFIG) & ~IOMAPflag,
|
|
ioaddr, COM9026_REG_RW_CONFIG);
|
|
|
|
free_irq(dev->irq, dev);
|
|
release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
|
|
free_netdev(dev);
|
|
}
|
|
|
|
module_init(com90io_init)
|
|
module_exit(com90io_exit)
|