release/src-rt-6.x.4708/linux/linux-2.6.36/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/bootmem.h>
  38 #include <linux/arcdevice.h>
  39 #include <linux/com20020.h>
  40
  41 #include <asm/io.h>
  42
  43 #define VERSION "arcnet: COM20020 ISA support (by David Woodhouse et al.)\n"
  44
  45
  46 /*
  47  * We cannot (yet) probe for an IO mapped card, although we can check that
  48  * it's where we were told it was, and even do autoirq.
  49  */
  50 static int __init com20020isa_probe(struct net_device *dev)
  51 {
  52         int ioaddr;
  53         unsigned long airqmask;
  54         struct arcnet_local *lp = netdev_priv(dev);
  55         int err;
  56
  57         BUGLVL(D_NORMAL) printk(VERSION);
  58
  59         ioaddr = dev->base_addr;
  60         if (!ioaddr) {
  61                 BUGMSG(D_NORMAL, "No autoprobe (yet) for IO mapped cards; you "
  62                        "must specify the base address!\n");
  63                 return -ENODEV;
  64         }
  65         if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "arcnet (COM20020)")) {
  66                 BUGMSG(D_NORMAL, "IO region %xh-%xh already allocated.\n",
  67                        ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
  68                 return -ENXIO;
  69         }
  70         if (ASTATUS() == 0xFF) {
  71                 BUGMSG(D_NORMAL, "IO address %x empty\n", ioaddr);
  72                 err = -ENODEV;
  73                 goto out;
  74         }
  75         if (com20020_check(dev)) {
  76                 err = -ENODEV;
  77                 goto out;
  78         }
  79
  80         if (!dev->irq) {
  81                 /* if we do this, we're sure to get an IRQ since the
  82                  * card has just reset and the NORXflag is on until
  83                  * we tell it to start receiving.
  84                  */
  85                 BUGMSG(D_INIT_REASONS, "intmask was %02Xh\n", inb(_INTMASK));
  86                 outb(0, _INTMASK);
  87                 airqmask = probe_irq_on();
  88                 outb(NORXflag, _INTMASK);
  89                 udelay(1);
  90                 outb(0, _INTMASK);
  91                 dev->irq = probe_irq_off(airqmask);
  92
  93                 if ((int)dev->irq <= 0) {
  94                         BUGMSG(D_INIT_REASONS, "Autoprobe IRQ failed first time\n");
  95                         airqmask = probe_irq_on();
  96                         outb(NORXflag, _INTMASK);
  97                         udelay(5);
  98                         outb(0, _INTMASK);
  99                         dev->irq = probe_irq_off(airqmask);
 100                         if ((int)dev->irq <= 0) {
 101                                 BUGMSG(D_NORMAL, "Autoprobe IRQ failed.\n");
 102                                 err = -ENODEV;
 103                                 goto out;
 104                         }
 105                 }
 106         }
 107
 108         lp->card_name = "ISA COM20020";
 109         if ((err = com20020_found(dev, 0)) != 0)
 110                 goto out;
 111
 112         return 0;
 113
 114 out:
 115         release_region(ioaddr, ARCNET_TOTAL_SIZE);
 116         return err;
 117 }
 118
 119 static int node = 0;
 120 static int io = 0x0;            /* <--- EDIT THESE LINES FOR YOUR CONFIGURATION */
 121 static int irq = 0;             /* or use the insmod io= irq= shmem= options */
 122 static char device[9];          /* use eg. device="arc1" to change name */
 123 static int timeout = 3;
 124 static int backplane = 0;
 125 static int clockp = 0;
 126 static int clockm = 0;
 127
 128 module_param(node, int, 0);
 129 module_param(io, int, 0);
 130 module_param(irq, int, 0);
 131 module_param_string(device, device, sizeof(device), 0);
 132 module_param(timeout, int, 0);
 133 module_param(backplane, int, 0);
 134 module_param(clockp, int, 0);
 135 module_param(clockm, int, 0);
 136
 137 MODULE_LICENSE("GPL");
 138
 139 static struct net_device *my_dev;
 140
 141 static int __init com20020_init(void)
 142 {
 143         struct net_device *dev;
 144         struct arcnet_local *lp;
 145
 146         dev = alloc_arcdev(device);
 147         if (!dev)
 148                 return -ENOMEM;
 149
 150         if (node && node != 0xff)
 151                 dev->dev_addr[0] = node;
 152
 153         dev->netdev_ops = &com20020_netdev_ops;
 154
 155         lp = netdev_priv(dev);
 156         lp->backplane = backplane;
 157         lp->clockp = clockp & 7;
 158         lp->clockm = clockm & 3;
 159         lp->timeout = timeout & 3;
 160         lp->hw.owner = THIS_MODULE;
 161
 162         dev->base_addr = io;
 163         dev->irq = irq;
 164
 165         if (dev->irq == 2)
 166                 dev->irq = 9;
 167
 168         if (com20020isa_probe(dev)) {
 169                 free_netdev(dev);
 170                 return -EIO;
 171         }
 172
 173         my_dev = dev;
 174         return 0;
 175 }
 176
 177 static void __exit com20020_exit(void)
 178 {
 179         unregister_netdev(my_dev);
 180         free_irq(my_dev->irq, my_dev);
 181         release_region(my_dev->base_addr, ARCNET_TOTAL_SIZE);
 182         free_netdev(my_dev);
 183 }
 184
 185 #ifndef MODULE
 186 static int __init com20020isa_setup(char *s)
 187 {
 188         int ints[8];
 189
 190         s = get_options(s, 8, ints);
 191         if (!ints[0])
 192                 return 1;
 193
 194         switch (ints[0]) {
 195         default:                /* ERROR */
 196                 printk("com90xx: Too many arguments.\n");
 197         case 6:         /* Timeout */
 198                 timeout = ints[6];
 199         case 5:         /* CKP value */
 200                 clockp = ints[5];
 201         case 4:         /* Backplane flag */
 202                 backplane = ints[4];
 203         case 3:         /* Node ID */
 204                 node = ints[3];
 205         case 2:         /* IRQ */
 206                 irq = ints[2];
 207         case 1:         /* IO address */
 208                 io = ints[1];
 209         }
 210         if (*s)
 211                 snprintf(device, sizeof(device), "%s", s);
 212         return 1;
 213 }
 214
 215 __setup("com20020=", com20020isa_setup);
 216
 217 #endif                          /* MODULE */
 218
 219 module_init(com20020_init)
 220 module_exit(com20020_exit)