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/*
* Linux ARCnet driver - COM20020 chipset support
*
* 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
*
* **********************
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/arcdevice.h>
#include <linux/com20020.h>
#include <asm/io.h>
#define VERSION "arcnet: COM20020 ISA support (by David Woodhouse et al.)\n"
/*
* We cannot (yet) probe for an IO mapped card, although we can check that
* it's where we were told it was, and even do autoirq.
*/
static int __init com20020isa_probe(struct net_device *dev)
{
int ioaddr;
unsigned long airqmask;
struct arcnet_local *lp = dev->priv;
#ifndef MODULE
arcnet_init();
#endif
BUGLVL(D_NORMAL) printk(VERSION);
ioaddr = dev->base_addr;
if (!ioaddr) {
BUGMSG(D_NORMAL, "No autoprobe (yet) for IO mapped cards; you "
"must specify the base address!\n");
return -ENODEV;
}
if (check_region(ioaddr, ARCNET_TOTAL_SIZE)) {
BUGMSG(D_NORMAL, "IO region %xh-%xh already allocated.\n",
ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
return -ENXIO;
}
if (ASTATUS() == 0xFF) {
BUGMSG(D_NORMAL, "IO address %x empty\n", ioaddr);
return -ENODEV;
}
if (com20020_check(dev))
return -ENODEV;
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.
*/
BUGMSG(D_INIT_REASONS, "intmask was %02Xh\n", inb(_INTMASK));
outb(0, _INTMASK);
airqmask = probe_irq_on();
outb(NORXflag, _INTMASK);
udelay(1);
outb(0, _INTMASK);
dev->irq = probe_irq_off(airqmask);
if (dev->irq <= 0) {
BUGMSG(D_INIT_REASONS, "Autoprobe IRQ failed first time\n");
airqmask = probe_irq_on();
outb(NORXflag, _INTMASK);
udelay(5);
outb(0, _INTMASK);
dev->irq = probe_irq_off(airqmask);
if (dev->irq <= 0) {
BUGMSG(D_NORMAL, "Autoprobe IRQ failed.\n");
return -ENODEV;
}
}
}
lp->card_name = "ISA COM20020";
return com20020_found(dev, 0);
}
#ifdef MODULE
static struct net_device *my_dev;
/* Module parameters */
static int node = 0;
static int io = 0x0; /* <--- EDIT THESE LINES FOR YOUR CONFIGURATION */
static int irq = 0; /* or use the insmod io= irq= shmem= options */
static char *device; /* use eg. device="arc1" to change name */
static int timeout = 3;
static int backplane = 0;
static int clockp = 0;
static int clockm = 0;
MODULE_PARM(node, "i");
MODULE_PARM(io, "i");
MODULE_PARM(irq, "i");
MODULE_PARM(device, "s");
MODULE_PARM(timeout, "i");
MODULE_PARM(backplane, "i");
MODULE_PARM(clockp, "i");
MODULE_PARM(clockm, "i");
static void com20020isa_open_close(struct net_device *dev, bool open)
{
if (open)
MOD_INC_USE_COUNT;
else
MOD_DEC_USE_COUNT;
}
int init_module(void)
{
struct net_device *dev;
struct arcnet_local *lp;
int err;
dev = dev_alloc(device ? : "arc%d", &err);
if (!dev)
return err;
lp = dev->priv = kmalloc(sizeof(struct arcnet_local), GFP_KERNEL);
if (!lp)
return -ENOMEM;
memset(lp, 0, sizeof(struct arcnet_local));
if (node && node != 0xff)
dev->dev_addr[0] = node;
lp->backplane = backplane;
lp->clockp = clockp & 7;
lp->clockm = clockm & 3;
lp->timeout = timeout & 3;
lp->hw.open_close_ll = com20020isa_open_close;
dev->base_addr = io;
dev->irq = irq;
if (dev->irq == 2)
dev->irq = 9;
if (com20020isa_probe(dev))
return -EIO;
my_dev = dev;
return 0;
}
void cleanup_module(void)
{
com20020_remove(my_dev);
}
#else
static int __init com20020isa_setup(char *s)
{
struct net_device *dev;
struct arcnet_local *lp;
int ints[8];
s = get_options(s, 8, ints);
if (!ints[0])
return 1;
dev = alloc_bootmem(sizeof(struct net_device) + sizeof(struct arcnet_local));
memset(dev, 0, sizeof(struct net_device) + sizeof(struct arcnet_local));
lp = dev->priv = (struct arcnet_local *) (dev + 1);
dev->init = com20020isa_probe;
switch (ints[0]) {
default: /* ERROR */
printk("com90xx: Too many arguments.\n");
case 6: /* Timeout */
lp->timeout = ints[6];
case 5: /* CKP value */
lp->clockp = ints[5];
case 4: /* Backplane flag */
lp->backplane = ints[4];
case 3: /* Node ID */
dev->dev_addr[0] = ints[3];
case 2: /* IRQ */
dev->irq = ints[2];
case 1: /* IO address */
dev->base_addr = ints[1];
}
if (*s)
strncpy(dev->name, s, 9);
else
strcpy(dev->name, "arc%d");
if (register_netdev(dev))
printk(KERN_ERR "com20020: Cannot register arcnet device\n");
return 1;
}
__setup("com20020=", com20020isa_setup);
#endif /* MODULE */
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