drivers/net/pcmcia/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/cs_types.h>
  47 #include <pcmcia/cs.h>
  48 #include <pcmcia/cistpl.h>
  49 #include <pcmcia/ds.h>
  50
  51 #include <asm/io.h>
  52 #include <asm/system.h>
  53
  54 #define VERSION "arcnet: COM20020 PCMCIA support loaded.\n"
  55
  56 #ifdef PCMCIA_DEBUG
  57
  58 static int pc_debug = PCMCIA_DEBUG;
  59 module_param(pc_debug, int, 0);
  60 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
  61
  62 static void regdump(struct net_device *dev)
  63 {
  64     int ioaddr = dev->base_addr;
  65     int count;
  66
  67     printk("com20020 register dump:\n");
  68     for (count = ioaddr; count < ioaddr + 16; count++)
  69     {
  70         if (!(count % 16))
  71             printk("\n%04X: ", count);
  72         printk("%02X ", inb(count));
  73     }
  74     printk("\n");
  75
  76     printk("buffer0 dump:\n");
  77         /* set up the address register */
  78         count = 0;
  79         outb((count >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI);
  80         outb(count & 0xff, _ADDR_LO);
  81
  82     for (count = 0; count < 256+32; count++)
  83     {
  84         if (!(count % 16))
  85             printk("\n%04X: ", count);
  86
  87         /* copy the data */
  88         printk("%02X ", inb(_MEMDATA));
  89     }
  90     printk("\n");
  91 }
  92
  93 #else
  94
  95 #define DEBUG(n, args...) do { } while (0)
  96 static inline void regdump(struct net_device *dev) { }
  97
  98 #endif
  99
 100
 101 /*====================================================================*/
 102
 103 /* Parameters that can be set with 'insmod' */
 104
 105 static int node;
 106 static int timeout = 3;
 107 static int backplane;
 108 static int clockp;
 109 static int clockm;
 110
 111 module_param(node, int, 0);
 112 module_param(timeout, int, 0);
 113 module_param(backplane, int, 0);
 114 module_param(clockp, int, 0);
 115 module_param(clockm, int, 0);
 116
 117 MODULE_LICENSE("GPL");
 118
 119 /*====================================================================*/
 120
 121 static int com20020_config(struct pcmcia_device *link);
 122 static void com20020_release(struct pcmcia_device *link);
 123
 124 static void com20020_detach(struct pcmcia_device *p_dev);
 125
 126 /*====================================================================*/
 127
 128 typedef struct com20020_dev_t {
 129     struct net_device       *dev;
 130     dev_node_t          node;
 131 } com20020_dev_t;
 132
 133 /*======================================================================
 134
 135     com20020_attach() creates an "instance" of the driver, allocating
 136     local data structures for one device.  The device is registered
 137     with Card Services.
 138
 139 ======================================================================*/
 140
 141 static int com20020_probe(struct pcmcia_device *p_dev)
 142 {
 143     com20020_dev_t *info;
 144     struct net_device *dev;
 145     struct arcnet_local *lp;
 146
 147     DEBUG(0, "com20020_attach()\n");
 148
 149     /* Create new network device */
 150     info = kzalloc(sizeof(struct com20020_dev_t), GFP_KERNEL);
 151     if (!info)
 152         goto fail_alloc_info;
 153
 154     dev = alloc_arcdev("");
 155     if (!dev)
 156         goto fail_alloc_dev;
 157
 158     lp = netdev_priv(dev);
 159     lp->timeout = timeout;
 160     lp->backplane = backplane;
 161     lp->clockp = clockp;
 162     lp->clockm = clockm & 3;
 163     lp->hw.owner = THIS_MODULE;
 164
 165     /* fill in our module parameters as defaults */
 166     dev->dev_addr[0] = node;
 167
 168     p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 169     p_dev->io.NumPorts1 = 16;
 170     p_dev->io.IOAddrLines = 16;
 171     p_dev->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 172     p_dev->irq.IRQInfo1 = IRQ_LEVEL_ID;
 173     p_dev->conf.Attributes = CONF_ENABLE_IRQ;
 174     p_dev->conf.IntType = INT_MEMORY_AND_IO;
 175
 176     p_dev->irq.Instance = info->dev = dev;
 177     p_dev->priv = info;
 178
 179     return com20020_config(p_dev);
 180
 181 fail_alloc_dev:
 182     kfree(info);
 183 fail_alloc_info:
 184     return -ENOMEM;
 185 } /* com20020_attach */
 186
 187 /*======================================================================
 188
 189     This deletes a driver "instance".  The device is de-registered
 190     with Card Services.  If it has been released, all local data
 191     structures are freed.  Otherwise, the structures will be freed
 192     when the device is released.
 193
 194 ======================================================================*/
 195
 196 static void com20020_detach(struct pcmcia_device *link)
 197 {
 198     struct com20020_dev_t *info = link->priv;
 199     struct net_device *dev = info->dev;
 200
 201     DEBUG(1,"detach...\n");
 202
 203     DEBUG(0, "com20020_detach(0x%p)\n", link);
 204
 205     if (link->dev_node) {
 206         DEBUG(1,"unregister...\n");
 207
 208         unregister_netdev(dev);
 209
 210         /*
 211          * this is necessary because we register our IRQ separately
 212          * from card services.
 213          */
 214         if (dev->irq)
 215             free_irq(dev->irq, dev);
 216     }
 217
 218     com20020_release(link);
 219
 220     /* Unlink device structure, free bits */
 221     DEBUG(1,"unlinking...\n");
 222     if (link->priv)
 223     {
 224         dev = info->dev;
 225         if (dev)
 226         {
 227             DEBUG(1,"kfree...\n");
 228             free_netdev(dev);
 229         }
 230         DEBUG(1,"kfree2...\n");
 231         kfree(info);
 232     }
 233
 234 } /* com20020_detach */
 235
 236 /*======================================================================
 237
 238     com20020_config() is scheduled to run after a CARD_INSERTION event
 239     is received, to configure the PCMCIA socket, and to make the
 240     device available to the system.
 241
 242 ======================================================================*/
 243
 244 #define CS_CHECK(fn, ret) \
 245 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
 246
 247 static int com20020_config(struct pcmcia_device *link)
 248 {
 249     struct arcnet_local *lp;
 250     com20020_dev_t *info;
 251     struct net_device *dev;
 252     int i, last_ret, last_fn;
 253     int ioaddr;
 254
 255     info = link->priv;
 256     dev = info->dev;
 257
 258     DEBUG(1,"config...\n");
 259
 260     DEBUG(0, "com20020_config(0x%p)\n", link);
 261
 262     DEBUG(1,"arcnet: baseport1 is %Xh\n", link->io.BasePort1);
 263     i = -ENODEV;
 264     if (!link->io.BasePort1)
 265     {
 266         for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10)
 267         {
 268             link->io.BasePort1 = ioaddr;
 269             i = pcmcia_request_io(link, &link->io);
 270             if (i == 0)
 271                 break;
 272         }
 273     }
 274     else
 275         i = pcmcia_request_io(link, &link->io);
 276
 277     if (i != 0)
 278     {
 279         DEBUG(1,"arcnet: requestIO failed totally!\n");
 280         goto failed;
 281     }
 282
 283     ioaddr = dev->base_addr = link->io.BasePort1;
 284     DEBUG(1,"arcnet: got ioaddr %Xh\n", ioaddr);
 285
 286     DEBUG(1,"arcnet: request IRQ %d (%Xh/%Xh)\n",
 287            link->irq.AssignedIRQ,
 288            link->irq.IRQInfo1, link->irq.IRQInfo2);
 289     i = pcmcia_request_irq(link, &link->irq);
 290     if (i != 0)
 291     {
 292         DEBUG(1,"arcnet: requestIRQ failed totally!\n");
 293         goto failed;
 294     }
 295
 296     dev->irq = link->irq.AssignedIRQ;
 297
 298     CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
 299
 300     if (com20020_check(dev))
 301     {
 302         regdump(dev);
 303         goto failed;
 304     }
 305
 306     lp = netdev_priv(dev);
 307     lp->card_name = "PCMCIA COM20020";
 308     lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */
 309
 310     link->dev_node = &info->node;
 311     SET_NETDEV_DEV(dev, &handle_to_dev(link));
 312
 313     i = com20020_found(dev, 0); /* calls register_netdev */
 314
 315     if (i != 0) {
 316         DEBUG(1,KERN_NOTICE "com20020_cs: com20020_found() failed\n");
 317         link->dev_node = NULL;
 318         goto failed;
 319     }
 320
 321     strcpy(info->node.dev_name, dev->name);
 322
 323     DEBUG(1,KERN_INFO "%s: port %#3lx, irq %d\n",
 324            dev->name, dev->base_addr, dev->irq);
 325     return 0;
 326
 327 cs_failed:
 328     cs_error(link, last_fn, last_ret);
 329 failed:
 330     DEBUG(1,"com20020_config failed...\n");
 331     com20020_release(link);
 332     return -ENODEV;
 333 } /* com20020_config */
 334
 335 /*======================================================================
 336
 337     After a card is removed, com20020_release() will unregister the net
 338     device, and release the PCMCIA configuration.  If the device is
 339     still open, this will be postponed until it is closed.
 340
 341 ======================================================================*/
 342
 343 static void com20020_release(struct pcmcia_device *link)
 344 {
 345         DEBUG(0, "com20020_release(0x%p)\n", link);
 346         pcmcia_disable_device(link);
 347 }
 348
 349 static int com20020_suspend(struct pcmcia_device *link)
 350 {
 351         com20020_dev_t *info = link->priv;
 352         struct net_device *dev = info->dev;
 353
 354         if (link->open)
 355                 netif_device_detach(dev);
 356
 357         return 0;
 358 }
 359
 360 static int com20020_resume(struct pcmcia_device *link)
 361 {
 362         com20020_dev_t *info = link->priv;
 363         struct net_device *dev = info->dev;
 364
 365         if (link->open) {
 366                 int ioaddr = dev->base_addr;
 367                 struct arcnet_local *lp = netdev_priv(dev);
 368                 ARCRESET;
 369         }
 370
 371         return 0;
 372 }
 373
 374 static struct pcmcia_device_id com20020_ids[] = {
 375         PCMCIA_DEVICE_PROD_ID12("Contemporary Control Systems, Inc.",
 376                         "PCM20 Arcnet Adapter", 0x59991666, 0x95dfffaf),
 377         PCMCIA_DEVICE_PROD_ID12("SoHard AG",
 378                         "SH ARC PCMCIA", 0xf8991729, 0x69dff0c7),
 379         PCMCIA_DEVICE_NULL
 380 };
 381 MODULE_DEVICE_TABLE(pcmcia, com20020_ids);
 382
 383 static struct pcmcia_driver com20020_cs_driver = {
 384         .owner          = THIS_MODULE,
 385         .drv            = {
 386                 .name   = "com20020_cs",
 387         },
 388         .probe          = com20020_probe,
 389         .remove         = com20020_detach,
 390         .id_table       = com20020_ids,
 391         .suspend        = com20020_suspend,
 392         .resume         = com20020_resume,
 393 };
 394
 395 static int __init init_com20020_cs(void)
 396 {
 397         return pcmcia_register_driver(&com20020_cs_driver);
 398 }
 399
 400 static void __exit exit_com20020_cs(void)
 401 {
 402         pcmcia_unregister_driver(&com20020_cs_driver);
 403 }
 404
 405 module_init(init_com20020_cs);
 406 module_exit(exit_com20020_cs);