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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
*
* **********************
*/
#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/ioport.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/memblock.h>
#include <linux/io.h>
#include "arcdevice.h"
#include "com20020.h"
/* 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 = netdev_priv(dev);
int err;
if (BUGLVL(D_NORMAL))
pr_info("%s\n", "COM20020 ISA support (by David Woodhouse et al.)");
ioaddr = dev->base_addr;
if (!ioaddr) {
arc_printk(D_NORMAL, dev, "No autoprobe (yet) for IO mapped cards; you must specify the base address!\n");
return -ENODEV;
}
if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "arcnet (COM20020)")) {
arc_printk(D_NORMAL, dev, "IO region %xh-%xh already allocated.\n",
ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
return -ENXIO;
}
if (arcnet_inb(ioaddr, COM20020_REG_R_STATUS) == 0xFF) {
arc_printk(D_NORMAL, dev, "IO address %x empty\n", ioaddr);
err = -ENODEV;
goto out;
}
if (com20020_check(dev)) {
err = -ENODEV;
goto 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.
*/
arc_printk(D_INIT_REASONS, dev, "intmask was %02Xh\n",
arcnet_inb(ioaddr, COM20020_REG_R_STATUS));
arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK);
airqmask = probe_irq_on();
arcnet_outb(NORXflag, ioaddr, COM20020_REG_W_INTMASK);
udelay(1);
arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK);
dev->irq = probe_irq_off(airqmask);
if ((int)dev->irq <= 0) {
arc_printk(D_INIT_REASONS, dev, "Autoprobe IRQ failed first time\n");
airqmask = probe_irq_on();
arcnet_outb(NORXflag, ioaddr, COM20020_REG_W_INTMASK);
udelay(5);
arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK);
dev->irq = probe_irq_off(airqmask);
if ((int)dev->irq <= 0) {
arc_printk(D_NORMAL, dev, "Autoprobe IRQ failed.\n");
err = -ENODEV;
goto out;
}
}
}
lp->card_name = "ISA COM20020";
err = com20020_found(dev, 0);
if (err != 0)
goto out;
return 0;
out:
release_region(ioaddr, ARCNET_TOTAL_SIZE);
return err;
}
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[9]; /* use eg. device="arc1" to change name */
static int timeout = 3;
static int backplane = 0;
static int clockp = 0;
static int clockm = 0;
module_param(node, int, 0);
module_param_hw(io, int, ioport, 0);
module_param_hw(irq, int, irq, 0);
module_param_string(device, device, sizeof(device), 0);
module_param(timeout, int, 0);
module_param(backplane, int, 0);
module_param(clockp, int, 0);
module_param(clockm, int, 0);
MODULE_LICENSE("GPL");
static struct net_device *my_dev;
static int __init com20020_init(void)
{
struct net_device *dev;
struct arcnet_local *lp;
dev = alloc_arcdev(device);
if (!dev)
return -ENOMEM;
if (node && node != 0xff)
arcnet_set_addr(dev, node);
dev->netdev_ops = &com20020_netdev_ops;
lp = netdev_priv(dev);
lp->backplane = backplane;
lp->clockp = clockp & 7;
lp->clockm = clockm & 3;
lp->timeout = timeout & 3;
lp->hw.owner = THIS_MODULE;
dev->base_addr = io;
dev->irq = irq;
if (dev->irq == 2)
dev->irq = 9;
if (com20020isa_probe(dev)) {
free_arcdev(dev);
return -EIO;
}
my_dev = dev;
return 0;
}
static void __exit com20020_exit(void)
{
unregister_netdev(my_dev);
free_irq(my_dev->irq, my_dev);
release_region(my_dev->base_addr, ARCNET_TOTAL_SIZE);
free_arcdev(my_dev);
}
#ifndef MODULE
static int __init com20020isa_setup(char *s)
{
int ints[8];
s = get_options(s, 8, ints);
if (!ints[0])
return 1;
switch (ints[0]) {
default: /* ERROR */
pr_info("Too many arguments\n");
fallthrough;
case 6: /* Timeout */
timeout = ints[6];
fallthrough;
case 5: /* CKP value */
clockp = ints[5];
fallthrough;
case 4: /* Backplane flag */
backplane = ints[4];
fallthrough;
case 3: /* Node ID */
node = ints[3];
fallthrough;
case 2: /* IRQ */
irq = ints[2];
fallthrough;
case 1: /* IO address */
io = ints[1];
}
if (*s)
snprintf(device, sizeof(device), "%s", s);
return 1;
}
__setup("com20020=", com20020isa_setup);
#endif /* MODULE */
module_init(com20020_init)
module_exit(com20020_exit)
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