LXR linux/drivers/net/arcnet/com20020-isa.c

   1/*
   2 * Linux ARCnet driver - COM20020 chipset support
   3 * 
   4 * Written 1997 by David Woodhouse.
   5 * Written 1994-1999 by Avery Pennarun.
   6 * Written 1999-2000 by Martin Mares <mj@ucw.cz>.
   7 * Derived from skeleton.c by Donald Becker.
   8 *
   9 * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
  10 *  for sponsoring the further development of this driver.
  11 *
  12 * **********************
  13 *
  14 * The original copyright of skeleton.c was as follows:
  15 *
  16 * skeleton.c Written 1993 by Donald Becker.
  17 * Copyright 1993 United States Government as represented by the
  18 * Director, National Security Agency.  This software may only be used
  19 * and distributed according to the terms of the GNU General Public License as
  20 * modified by SRC, incorporated herein by reference.
  21 *
  22 * **********************
  23 *
  24 * For more details, see drivers/net/arcnet.c
  25 *
  26 * **********************
  27 */
  28#include <linux/module.h>
  29#include <linux/moduleparam.h>
  30#include <linux/kernel.h>
  31#include <linux/types.h>
  32#include <linux/ioport.h>
  33#include <linux/slab.h>
  34#include <linux/errno.h>
  35#include <linux/delay.h>
  36#include <linux/netdevice.h>
  37#include <linux/init.h>
  38#include <linux/bootmem.h>
  39#include <linux/arcdevice.h>
  40#include <linux/com20020.h>
  41
  42#include <asm/io.h>
  43
  44#define VERSION "arcnet: COM20020 ISA support (by David Woodhouse et al.)\n"
  45
  46
  47/*
  48 * We cannot (yet) probe for an IO mapped card, although we can check that
  49 * it's where we were told it was, and even do autoirq.
  50 */
  51static int __init com20020isa_probe(struct net_device *dev)
  52{
  53        int ioaddr;
  54        unsigned long airqmask;
  55        struct arcnet_local *lp = netdev_priv(dev);
  56        int err;
  57
  58        BUGLVL(D_NORMAL) printk(VERSION);
  59
  60        ioaddr = dev->base_addr;
  61        if (!ioaddr) {
  62                BUGMSG(D_NORMAL, "No autoprobe (yet) for IO mapped cards; you "
  63                       "must specify the base address!\n");
  64                return -ENODEV;
  65        }
  66        if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "arcnet (COM20020)")) {
  67                BUGMSG(D_NORMAL, "IO region %xh-%xh already allocated.\n",
  68                       ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
  69                return -ENXIO;
  70        }
  71        if (ASTATUS() == 0xFF) {
  72                BUGMSG(D_NORMAL, "IO address %x empty\n", ioaddr);
  73                err = -ENODEV;
  74                goto out;
  75        }
  76        if (com20020_check(dev)) {
  77                err = -ENODEV;
  78                goto out;
  79        }
  80
  81        if (!dev->irq) {
  82                /* if we do this, we're sure to get an IRQ since the
  83                 * card has just reset and the NORXflag is on until
  84                 * we tell it to start receiving.
  85                 */
  86                BUGMSG(D_INIT_REASONS, "intmask was %02Xh\n", inb(_INTMASK));
  87                outb(0, _INTMASK);
  88                airqmask = probe_irq_on();
  89                outb(NORXflag, _INTMASK);
  90                udelay(1);
  91                outb(0, _INTMASK);
  92                dev->irq = probe_irq_off(airqmask);
  93
  94                if (dev->irq <= 0) {
  95                        BUGMSG(D_INIT_REASONS, "Autoprobe IRQ failed first time\n");
  96                        airqmask = probe_irq_on();
  97                        outb(NORXflag, _INTMASK);
  98                        udelay(5);
  99                        outb(0, _INTMASK);
 100                        dev->irq = probe_irq_off(airqmask);
 101                        if (dev->irq <= 0) {
 102                                BUGMSG(D_NORMAL, "Autoprobe IRQ failed.\n");
 103                                err = -ENODEV;
 104                                goto out;
 105                        }
 106                }
 107        }
 108
 109        lp->card_name = "ISA COM20020";
 110        if ((err = com20020_found(dev, 0)) != 0)
 111                goto out;
 112
 113        return 0;
 114
 115out:
 116        release_region(ioaddr, ARCNET_TOTAL_SIZE);
 117        return err;
 118}
 119
 120static int node = 0;
 121static int io = 0x0;            /* <--- EDIT THESE LINES FOR YOUR CONFIGURATION */
 122static int irq = 0;             /* or use the insmod io= irq= shmem= options */
 123static char device[9];          /* use eg. device="arc1" to change name */
 124static int timeout = 3;
 125static int backplane = 0;
 126static int clockp = 0;
 127static int clockm = 0;
 128
 129module_param(node, int, 0);
 130module_param(io, int, 0);
 131module_param(irq, int, 0);
 132module_param_string(device, device, sizeof(device), 0);
 133module_param(timeout, int, 0);
 134module_param(backplane, int, 0);
 135module_param(clockp, int, 0);
 136module_param(clockm, int, 0);
 137
 138MODULE_LICENSE("GPL");
 139
 140static struct net_device *my_dev;
 141
 142static int __init com20020_init(void)
 143{
 144        struct net_device *dev;
 145        struct arcnet_local *lp;
 146
 147        dev = alloc_arcdev(device);
 148        if (!dev)
 149                return -ENOMEM;
 150
 151        if (node && node != 0xff)
 152                dev->dev_addr[0] = node;
 153
 154        dev->netdev_ops = &com20020_netdev_ops;
 155
 156        lp = netdev_priv(dev);
 157        lp->backplane = backplane;
 158        lp->clockp = clockp & 7;
 159        lp->clockm = clockm & 3;
 160        lp->timeout = timeout & 3;
 161        lp->hw.owner = THIS_MODULE;
 162
 163        dev->base_addr = io;
 164        dev->irq = irq;
 165
 166        if (dev->irq == 2)
 167                dev->irq = 9;
 168
 169        if (com20020isa_probe(dev)) {
 170                free_netdev(dev);
 171                return -EIO;
 172        }
 173
 174        my_dev = dev;
 175        return 0;
 176}
 177
 178static void __exit com20020_exit(void)
 179{
 180        unregister_netdev(my_dev);
 181        free_irq(my_dev->irq, my_dev);
 182        release_region(my_dev->base_addr, ARCNET_TOTAL_SIZE);
 183        free_netdev(my_dev);
 184}
 185
 186#ifndef MODULE
 187static int __init com20020isa_setup(char *s)
 188{
 189        int ints[8];
 190
 191        s = get_options(s, 8, ints);
 192        if (!ints[0])
 193                return 1;
 194
 195        switch (ints[0]) {
 196        default:                /* ERROR */
 197                printk("com90xx: Too many arguments.\n");
 198        case 6:         /* Timeout */
 199                timeout = ints[6];
 200        case 5:         /* CKP value */
 201                clockp = ints[5];
 202        case 4:         /* Backplane flag */
 203                backplane = ints[4];
 204        case 3:         /* Node ID */
 205                node = ints[3];
 206        case 2:         /* IRQ */
 207                irq = ints[2];
 208        case 1:         /* IO address */
 209                io = ints[1];
 210        }
 211        if (*s)
 212                snprintf(device, sizeof(device), "%s", s);
 213        return 1;
 214}
 215
 216__setup("com20020=", com20020isa_setup);
 217
 218#endif                          /* MODULE */
 219
 220module_init(com20020_init)
 221module_exit(com20020_exit)
 222