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 #include <asm/system.h>
  51
  52 #define VERSION "arcnet: COM20020 PCMCIA support loaded.\n"
  53
  54
  55 static void regdump(struct net_device *dev)
  56 {
  57 #ifdef DEBUG
  58     int ioaddr = dev->base_addr;
  59     int count;
  60
  61     netdev_dbg(dev, "register dump:\n");
  62     for (count = ioaddr; count < ioaddr + 16; count++)
  63     {
  64         if (!(count % 16))
  65             pr_cont("%04X:", count);
  66         pr_cont(" %02X", inb(count));
  67     }
  68     pr_cont("\n");
  69
  70     netdev_dbg(dev, "buffer0 dump:\n");
  71         /* set up the address register */
  72         count = 0;
  73         outb((count >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI);
  74         outb(count & 0xff, _ADDR_LO);
  75
  76     for (count = 0; count < 256+32; count++)
  77     {
  78         if (!(count % 16))
  79             pr_cont("%04X:", count);
  80
  81         /* copy the data */
  82         pr_cont(" %02X", inb(_MEMDATA));
  83     }
  84     pr_cont("\n");
  85 #endif
  86 }
  87
  88
  89
  90 /*====================================================================*/
  91
  92 /* Parameters that can be set with 'insmod' */
  93
  94 static int node;
  95 static int timeout = 3;
  96 static int backplane;
  97 static int clockp;
  98 static int clockm;
  99
 100 module_param(node, int, 0);
 101 module_param(timeout, int, 0);
 102 module_param(backplane, int, 0);
 103 module_param(clockp, int, 0);
 104 module_param(clockm, int, 0);
 105
 106 MODULE_LICENSE("GPL");
 107
 108 /*====================================================================*/
 109
 110 static int com20020_config(struct pcmcia_device *link);
 111 static void com20020_release(struct pcmcia_device *link);
 112
 113 static void com20020_detach(struct pcmcia_device *p_dev);
 114
 115 /*====================================================================*/
 116
 117 typedef struct com20020_dev_t {
 118     struct net_device       *dev;
 119 } com20020_dev_t;
 120
 121 static int com20020_probe(struct pcmcia_device *p_dev)
 122 {
 123     com20020_dev_t *info;
 124     struct net_device *dev;
 125     struct arcnet_local *lp;
 126
 127     dev_dbg(&p_dev->dev, "com20020_attach()\n");
 128
 129     /* Create new network device */
 130     info = kzalloc(sizeof(struct com20020_dev_t), GFP_KERNEL);
 131     if (!info)
 132         goto fail_alloc_info;
 133
 134     dev = alloc_arcdev("");
 135     if (!dev)
 136         goto fail_alloc_dev;
 137
 138     lp = netdev_priv(dev);
 139     lp->timeout = timeout;
 140     lp->backplane = backplane;
 141     lp->clockp = clockp;
 142     lp->clockm = clockm & 3;
 143     lp->hw.owner = THIS_MODULE;
 144
 145     /* fill in our module parameters as defaults */
 146     dev->dev_addr[0] = node;
 147
 148     p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
 149     p_dev->resource[0]->end = 16;
 150     p_dev->config_flags |= CONF_ENABLE_IRQ;
 151
 152     info->dev = dev;
 153     p_dev->priv = info;
 154
 155     return com20020_config(p_dev);
 156
 157 fail_alloc_dev:
 158     kfree(info);
 159 fail_alloc_info:
 160     return -ENOMEM;
 161 } /* com20020_attach */
 162
 163 static void com20020_detach(struct pcmcia_device *link)
 164 {
 165     struct com20020_dev_t *info = link->priv;
 166     struct net_device *dev = info->dev;
 167
 168     dev_dbg(&link->dev, "detach...\n");
 169
 170     dev_dbg(&link->dev, "com20020_detach\n");
 171
 172     dev_dbg(&link->dev, "unregister...\n");
 173
 174     unregister_netdev(dev);
 175
 176     /*
 177      * this is necessary because we register our IRQ separately
 178      * from card services.
 179      */
 180     if (dev->irq)
 181             free_irq(dev->irq, dev);
 182
 183     com20020_release(link);
 184
 185     /* Unlink device structure, free bits */
 186     dev_dbg(&link->dev, "unlinking...\n");
 187     if (link->priv)
 188     {
 189         dev = info->dev;
 190         if (dev)
 191         {
 192             dev_dbg(&link->dev, "kfree...\n");
 193             free_netdev(dev);
 194         }
 195         dev_dbg(&link->dev, "kfree2...\n");
 196         kfree(info);
 197     }
 198
 199 } /* com20020_detach */
 200
 201 static int com20020_config(struct pcmcia_device *link)
 202 {
 203     struct arcnet_local *lp;
 204     com20020_dev_t *info;
 205     struct net_device *dev;
 206     int i, ret;
 207     int ioaddr;
 208
 209     info = link->priv;
 210     dev = info->dev;
 211
 212     dev_dbg(&link->dev, "config...\n");
 213
 214     dev_dbg(&link->dev, "com20020_config\n");
 215
 216     dev_dbg(&link->dev, "baseport1 is %Xh\n",
 217             (unsigned int) link->resource[0]->start);
 218
 219     i = -ENODEV;
 220     link->io_lines = 16;
 221
 222     if (!link->resource[0]->start)
 223     {
 224         for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10)
 225         {
 226             link->resource[0]->start = ioaddr;
 227             i = pcmcia_request_io(link);
 228             if (i == 0)
 229                 break;
 230         }
 231     }
 232     else
 233         i = pcmcia_request_io(link);
 234
 235     if (i != 0)
 236     {
 237         dev_dbg(&link->dev, "requestIO failed totally!\n");
 238         goto failed;
 239     }
 240
 241     ioaddr = dev->base_addr = link->resource[0]->start;
 242     dev_dbg(&link->dev, "got ioaddr %Xh\n", ioaddr);
 243
 244     dev_dbg(&link->dev, "request IRQ %d\n",
 245             link->irq);
 246     if (!link->irq)
 247     {
 248         dev_dbg(&link->dev, "requestIRQ failed totally!\n");
 249         goto failed;
 250     }
 251
 252     dev->irq = link->irq;
 253
 254     ret = pcmcia_enable_device(link);
 255     if (ret)
 256             goto failed;
 257
 258     if (com20020_check(dev))
 259     {
 260         regdump(dev);
 261         goto failed;
 262     }
 263
 264     lp = netdev_priv(dev);
 265     lp->card_name = "PCMCIA COM20020";
 266     lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */
 267
 268     SET_NETDEV_DEV(dev, &link->dev);
 269
 270     i = com20020_found(dev, 0); /* calls register_netdev */
 271
 272     if (i != 0) {
 273         dev_notice(&link->dev,
 274                    "com20020_found() failed\n");
 275         goto failed;
 276     }
 277
 278     netdev_dbg(dev, "port %#3lx, irq %d\n",
 279                dev->base_addr, dev->irq);
 280     return 0;
 281
 282 failed:
 283     dev_dbg(&link->dev, "com20020_config failed...\n");
 284     com20020_release(link);
 285     return -ENODEV;
 286 } /* com20020_config */
 287
 288 static void com20020_release(struct pcmcia_device *link)
 289 {
 290         dev_dbg(&link->dev, "com20020_release\n");
 291         pcmcia_disable_device(link);
 292 }
 293
 294 static int com20020_suspend(struct pcmcia_device *link)
 295 {
 296         com20020_dev_t *info = link->priv;
 297         struct net_device *dev = info->dev;
 298
 299         if (link->open)
 300                 netif_device_detach(dev);
 301
 302         return 0;
 303 }
 304
 305 static int com20020_resume(struct pcmcia_device *link)
 306 {
 307         com20020_dev_t *info = link->priv;
 308         struct net_device *dev = info->dev;
 309
 310         if (link->open) {
 311                 int ioaddr = dev->base_addr;
 312                 struct arcnet_local *lp = netdev_priv(dev);
 313                 ARCRESET;
 314         }
 315
 316         return 0;
 317 }
 318
 319 static const struct pcmcia_device_id com20020_ids[] = {
 320         PCMCIA_DEVICE_PROD_ID12("Contemporary Control Systems, Inc.",
 321                         "PCM20 Arcnet Adapter", 0x59991666, 0x95dfffaf),
 322         PCMCIA_DEVICE_PROD_ID12("SoHard AG",
 323                         "SH ARC PCMCIA", 0xf8991729, 0x69dff0c7),
 324         PCMCIA_DEVICE_NULL
 325 };
 326 MODULE_DEVICE_TABLE(pcmcia, com20020_ids);
 327
 328 static struct pcmcia_driver com20020_cs_driver = {
 329         .owner          = THIS_MODULE,
 330         .name           = "com20020_cs",
 331         .probe          = com20020_probe,
 332         .remove         = com20020_detach,
 333         .id_table       = com20020_ids,
 334         .suspend        = com20020_suspend,
 335         .resume         = com20020_resume,
 336 };
 337
 338 static int __init init_com20020_cs(void)
 339 {
 340         return pcmcia_register_driver(&com20020_cs_driver);
 341 }
 342
 343 static void __exit exit_com20020_cs(void)
 344 {
 345         pcmcia_unregister_driver(&com20020_cs_driver);
 346 }
 347
 348 module_init(init_com20020_cs);
 349 module_exit(exit_com20020_cs);