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/errno.h>
  34 #include <linux/delay.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/init.h>
  37 #include <linux/interrupt.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  */
  51 static 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 ((int)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 ((int)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
 115 out:
 116         release_region(ioaddr, ARCNET_TOTAL_SIZE);
 117         return err;
 118 }
 119
 120 static int node = 0;
 121 static int io = 0x0;            /* <--- EDIT THESE LINES FOR YOUR CONFIGURATION */
 122 static int irq = 0;             /* or use the insmod io= irq= shmem= options */
 123 static char device[9];          /* use eg. device="arc1" to change name */
 124 static int timeout = 3;
 125 static int backplane = 0;
 126 static int clockp = 0;
 127 static int clockm = 0;
 128
 129 module_param(node, int, 0);
 130 module_param(io, int, 0);
 131 module_param(irq, int, 0);
 132 module_param_string(device, device, sizeof(device), 0);
 133 module_param(timeout, int, 0);
 134 module_param(backplane, int, 0);
 135 module_param(clockp, int, 0);
 136 module_param(clockm, int, 0);
 137
 138 MODULE_LICENSE("GPL");
 139
 140 static struct net_device *my_dev;
 141
 142 static 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
 178 static 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
 187 static 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
 220 module_init(com20020_init)
 221 module_exit(com20020_exit)