drivers/net/arcnet/com20020_cs.c

   1 /*
   2  * Linux ARCnet driver - COM20020 PCMCIA support
   3  *
   4  * Written 1994-1999 by Avery Pennarun,
   5  *    based on an ISA version by David Woodhouse.
   6  * Derived from ibmtr_cs.c by Steve Kipisz (pcmcia-cs 3.1.4)
   7  *    which was derived from pcnet_cs.c by David Hinds.
   8  * Some additional portions derived from skeleton.c by Donald Becker.
   9  *
  10  * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
  11  *  for sponsoring the further development of this driver.
  12  *
  13  * **********************
  14  *
  15  * The original copyright of skeleton.c was as follows:
  16  *
  17  * skeleton.c Written 1993 by Donald Becker.
  18  * Copyright 1993 United States Government as represented by the
  19  * Director, National Security Agency.  This software may only be used
  20  * and distributed according to the terms of the GNU General Public License as
  21  * modified by SRC, incorporated herein by reference.
  22  *
  23  * **********************
  24  * Changes:
  25  * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 08/08/2000
  26  * - reorganize kmallocs in com20020_attach, checking all for failure
  27  *   and releasing the previous allocations if one fails
  28  * **********************
  29  *
  30  * For more details, see drivers/net/arcnet.c
  31  *
  32  * **********************
  33  */
  34 #include <linux/kernel.h>
  35 #include <linux/init.h>
  36 #include <linux/ptrace.h>
  37 #include <linux/slab.h>
  38 #include <linux/string.h>
  39 #include <linux/timer.h>
  40 #include <linux/delay.h>
  41 #include <linux/module.h>
  42 #include <linux/netdevice.h>
  43 #include <linux/arcdevice.h>
  44 #include <linux/com20020.h>
  45
  46 #include <pcmcia/cistpl.h>
  47 #include <pcmcia/ds.h>
  48
  49 #include <asm/io.h>
  50
  51 #define VERSION "arcnet: COM20020 PCMCIA support loaded.\n"
  52
  53
  54 static void regdump(struct net_device *dev)
  55 {
  56 #ifdef DEBUG
  57     int ioaddr = dev->base_addr;
  58     int count;
  59
  60     netdev_dbg(dev, "register dump:\n");
  61     for (count = ioaddr; count < ioaddr + 16; count++)
  62     {
  63         if (!(count % 16))
  64             pr_cont("%04X:", count);
  65         pr_cont(" %02X", inb(count));
  66     }
  67     pr_cont("\n");
  68
  69     netdev_dbg(dev, "buffer0 dump:\n");
  70         /* set up the address register */
  71         count = 0;
  72         outb((count >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI);
  73         outb(count & 0xff, _ADDR_LO);
  74
  75     for (count = 0; count < 256+32; count++)
  76     {
  77         if (!(count % 16))
  78             pr_cont("%04X:", count);
  79
  80         /* copy the data */
  81         pr_cont(" %02X", inb(_MEMDATA));
  82     }
  83     pr_cont("\n");
  84 #endif
  85 }
  86
  87
  88
  89 /*====================================================================*/
  90
  91 /* Parameters that can be set with 'insmod' */
  92
  93 static int node;
  94 static int timeout = 3;
  95 static int backplane;
  96 static int clockp;
  97 static int clockm;
  98
  99 module_param(node, int, 0);
 100 module_param(timeout, int, 0);
 101 module_param(backplane, int, 0);
 102 module_param(clockp, int, 0);
 103 module_param(clockm, int, 0);
 104
 105 MODULE_LICENSE("GPL");
 106
 107 /*====================================================================*/
 108
 109 static int com20020_config(struct pcmcia_device *link);
 110 static void com20020_release(struct pcmcia_device *link);
 111
 112 static void com20020_detach(struct pcmcia_device *p_dev);
 113
 114 /*====================================================================*/
 115
 116 typedef struct com20020_dev_t {
 117     struct net_device       *dev;
 118 } com20020_dev_t;
 119
 120 static int com20020_probe(struct pcmcia_device *p_dev)
 121 {
 122     com20020_dev_t *info;
 123     struct net_device *dev;
 124     struct arcnet_local *lp;
 125
 126     dev_dbg(&p_dev->dev, "com20020_attach()\n");
 127
 128     /* Create new network device */
 129     info = kzalloc(sizeof(struct com20020_dev_t), GFP_KERNEL);
 130     if (!info)
 131         goto fail_alloc_info;
 132
 133     dev = alloc_arcdev("");
 134     if (!dev)
 135         goto fail_alloc_dev;
 136
 137     lp = netdev_priv(dev);
 138     lp->timeout = timeout;
 139     lp->backplane = backplane;
 140     lp->clockp = clockp;
 141     lp->clockm = clockm & 3;
 142     lp->hw.owner = THIS_MODULE;
 143
 144     /* fill in our module parameters as defaults */
 145     dev->dev_addr[0] = node;
 146
 147     p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
 148     p_dev->resource[0]->end = 16;
 149     p_dev->config_flags |= CONF_ENABLE_IRQ;
 150
 151     info->dev = dev;
 152     p_dev->priv = info;
 153
 154     return com20020_config(p_dev);
 155
 156 fail_alloc_dev:
 157     kfree(info);
 158 fail_alloc_info:
 159     return -ENOMEM;
 160 } /* com20020_attach */
 161
 162 static void com20020_detach(struct pcmcia_device *link)
 163 {
 164     struct com20020_dev_t *info = link->priv;
 165     struct net_device *dev = info->dev;
 166
 167     dev_dbg(&link->dev, "detach...\n");
 168
 169     dev_dbg(&link->dev, "com20020_detach\n");
 170
 171     dev_dbg(&link->dev, "unregister...\n");
 172
 173     unregister_netdev(dev);
 174
 175     /*
 176      * this is necessary because we register our IRQ separately
 177      * from card services.
 178      */
 179     if (dev->irq)
 180             free_irq(dev->irq, dev);
 181
 182     com20020_release(link);
 183
 184     /* Unlink device structure, free bits */
 185     dev_dbg(&link->dev, "unlinking...\n");
 186     if (link->priv)
 187     {
 188         dev = info->dev;
 189         if (dev)
 190         {
 191             dev_dbg(&link->dev, "kfree...\n");
 192             free_netdev(dev);
 193         }
 194         dev_dbg(&link->dev, "kfree2...\n");
 195         kfree(info);
 196     }
 197
 198 } /* com20020_detach */
 199
 200 static int com20020_config(struct pcmcia_device *link)
 201 {
 202     struct arcnet_local *lp;
 203     com20020_dev_t *info;
 204     struct net_device *dev;
 205     int i, ret;
 206     int ioaddr;
 207
 208     info = link->priv;
 209     dev = info->dev;
 210
 211     dev_dbg(&link->dev, "config...\n");
 212
 213     dev_dbg(&link->dev, "com20020_config\n");
 214
 215     dev_dbg(&link->dev, "baseport1 is %Xh\n",
 216             (unsigned int) link->resource[0]->start);
 217
 218     i = -ENODEV;
 219     link->io_lines = 16;
 220
 221     if (!link->resource[0]->start)
 222     {
 223         for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10)
 224         {
 225             link->resource[0]->start = ioaddr;
 226             i = pcmcia_request_io(link);
 227             if (i == 0)
 228                 break;
 229         }
 230     }
 231     else
 232         i = pcmcia_request_io(link);
 233
 234     if (i != 0)
 235     {
 236         dev_dbg(&link->dev, "requestIO failed totally!\n");
 237         goto failed;
 238     }
 239
 240     ioaddr = dev->base_addr = link->resource[0]->start;
 241     dev_dbg(&link->dev, "got ioaddr %Xh\n", ioaddr);
 242
 243     dev_dbg(&link->dev, "request IRQ %d\n",
 244             link->irq);
 245     if (!link->irq)
 246     {
 247         dev_dbg(&link->dev, "requestIRQ failed totally!\n");
 248         goto failed;
 249     }
 250
 251     dev->irq = link->irq;
 252
 253     ret = pcmcia_enable_device(link);
 254     if (ret)
 255             goto failed;
 256
 257     if (com20020_check(dev))
 258     {
 259         regdump(dev);
 260         goto failed;
 261     }
 262
 263     lp = netdev_priv(dev);
 264     lp->card_name = "PCMCIA COM20020";
 265     lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */
 266
 267     SET_NETDEV_DEV(dev, &link->dev);
 268
 269     i = com20020_found(dev, 0); /* calls register_netdev */
 270
 271     if (i != 0) {
 272         dev_notice(&link->dev,
 273                    "com20020_found() failed\n");
 274         goto failed;
 275     }
 276
 277     netdev_dbg(dev, "port %#3lx, irq %d\n",
 278                dev->base_addr, dev->irq);
 279     return 0;
 280
 281 failed:
 282     dev_dbg(&link->dev, "com20020_config failed...\n");
 283     com20020_release(link);
 284     return -ENODEV;
 285 } /* com20020_config */
 286
 287 static void com20020_release(struct pcmcia_device *link)
 288 {
 289         dev_dbg(&link->dev, "com20020_release\n");
 290         pcmcia_disable_device(link);
 291 }
 292
 293 static int com20020_suspend(struct pcmcia_device *link)
 294 {
 295         com20020_dev_t *info = link->priv;
 296         struct net_device *dev = info->dev;
 297
 298         if (link->open)
 299                 netif_device_detach(dev);
 300
 301         return 0;
 302 }
 303
 304 static int com20020_resume(struct pcmcia_device *link)
 305 {
 306         com20020_dev_t *info = link->priv;
 307         struct net_device *dev = info->dev;
 308
 309         if (link->open) {
 310                 int ioaddr = dev->base_addr;
 311                 struct arcnet_local *lp = netdev_priv(dev);
 312                 ARCRESET;
 313         }
 314
 315         return 0;
 316 }
 317
 318 static const struct pcmcia_device_id com20020_ids[] = {
 319         PCMCIA_DEVICE_PROD_ID12("Contemporary Control Systems, Inc.",
 320                         "PCM20 Arcnet Adapter", 0x59991666, 0x95dfffaf),
 321         PCMCIA_DEVICE_PROD_ID12("SoHard AG",
 322                         "SH ARC PCMCIA", 0xf8991729, 0x69dff0c7),
 323         PCMCIA_DEVICE_NULL
 324 };
 325 MODULE_DEVICE_TABLE(pcmcia, com20020_ids);
 326
 327 static struct pcmcia_driver com20020_cs_driver = {
 328         .owner          = THIS_MODULE,
 329         .name           = "com20020_cs",
 330         .probe          = com20020_probe,
 331         .remove         = com20020_detach,
 332         .id_table       = com20020_ids,
 333         .suspend        = com20020_suspend,
 334         .resume         = com20020_resume,
 335 };
 336
 337 static int __init init_com20020_cs(void)
 338 {
 339         return pcmcia_register_driver(&com20020_cs_driver);
 340 }
 341
 342 static void __exit exit_com20020_cs(void)
 343 {
 344         pcmcia_unregister_driver(&com20020_cs_driver);
 345 }
 346
 347 module_init(init_com20020_cs);
 348 module_exit(exit_com20020_cs);