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 = kmalloc(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     memset(info, 0, sizeof(struct com20020_dev_t));
 159     lp = dev->priv;
 160     lp->timeout = timeout;
 161     lp->backplane = backplane;
 162     lp->clockp = clockp;
 163     lp->clockm = clockm & 3;
 164     lp->hw.owner = THIS_MODULE;
 165
 166     /* fill in our module parameters as defaults */
 167     dev->dev_addr[0] = node;
 168
 169     p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 170     p_dev->io.NumPorts1 = 16;
 171     p_dev->io.IOAddrLines = 16;
 172     p_dev->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 173     p_dev->irq.IRQInfo1 = IRQ_LEVEL_ID;
 174     p_dev->conf.Attributes = CONF_ENABLE_IRQ;
 175     p_dev->conf.IntType = INT_MEMORY_AND_IO;
 176     p_dev->conf.Present = PRESENT_OPTION;
 177
 178     p_dev->irq.Instance = info->dev = dev;
 179     p_dev->priv = info;
 180
 181     return com20020_config(p_dev);
 182
 183 fail_alloc_dev:
 184     kfree(info);
 185 fail_alloc_info:
 186     return -ENOMEM;
 187 } /* com20020_attach */
 188
 189 /*======================================================================
 190
 191     This deletes a driver "instance".  The device is de-registered
 192     with Card Services.  If it has been released, all local data
 193     structures are freed.  Otherwise, the structures will be freed
 194     when the device is released.
 195
 196 ======================================================================*/
 197
 198 static void com20020_detach(struct pcmcia_device *link)
 199 {
 200     struct com20020_dev_t *info = link->priv;
 201     struct net_device *dev = info->dev;
 202
 203     DEBUG(1,"detach...\n");
 204
 205     DEBUG(0, "com20020_detach(0x%p)\n", link);
 206
 207     if (link->dev_node) {
 208         DEBUG(1,"unregister...\n");
 209
 210         unregister_netdev(dev);
 211
 212         /*
 213          * this is necessary because we register our IRQ separately
 214          * from card services.
 215          */
 216         if (dev->irq)
 217             free_irq(dev->irq, dev);
 218     }
 219
 220     com20020_release(link);
 221
 222     /* Unlink device structure, free bits */
 223     DEBUG(1,"unlinking...\n");
 224     if (link->priv)
 225     {
 226         dev = info->dev;
 227         if (dev)
 228         {
 229             DEBUG(1,"kfree...\n");
 230             free_netdev(dev);
 231         }
 232         DEBUG(1,"kfree2...\n");
 233         kfree(info);
 234     }
 235
 236 } /* com20020_detach */
 237
 238 /*======================================================================
 239
 240     com20020_config() is scheduled to run after a CARD_INSERTION event
 241     is received, to configure the PCMCIA socket, and to make the
 242     device available to the system.
 243
 244 ======================================================================*/
 245
 246 #define CS_CHECK(fn, ret) \
 247 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
 248
 249 static int com20020_config(struct pcmcia_device *link)
 250 {
 251     struct arcnet_local *lp;
 252     tuple_t tuple;
 253     cisparse_t parse;
 254     com20020_dev_t *info;
 255     struct net_device *dev;
 256     int i, last_ret, last_fn;
 257     u_char buf[64];
 258     int ioaddr;
 259
 260     info = link->priv;
 261     dev = info->dev;
 262
 263     DEBUG(1,"config...\n");
 264
 265     DEBUG(0, "com20020_config(0x%p)\n", link);
 266
 267     tuple.Attributes = 0;
 268     tuple.TupleData = buf;
 269     tuple.TupleDataMax = 64;
 270     tuple.TupleOffset = 0;
 271     tuple.DesiredTuple = CISTPL_CONFIG;
 272     CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
 273     CS_CHECK(GetTupleData, pcmcia_get_tuple_data(link, &tuple));
 274     CS_CHECK(ParseTuple, pcmcia_parse_tuple(link, &tuple, &parse));
 275     link->conf.ConfigBase = parse.config.base;
 276
 277     DEBUG(1,"arcnet: baseport1 is %Xh\n", link->io.BasePort1);
 278     i = !CS_SUCCESS;
 279     if (!link->io.BasePort1)
 280     {
 281         for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10)
 282         {
 283             link->io.BasePort1 = ioaddr;
 284             i = pcmcia_request_io(link, &link->io);
 285             if (i == CS_SUCCESS)
 286                 break;
 287         }
 288     }
 289     else
 290         i = pcmcia_request_io(link, &link->io);
 291
 292     if (i != CS_SUCCESS)
 293     {
 294         DEBUG(1,"arcnet: requestIO failed totally!\n");
 295         goto failed;
 296     }
 297
 298     ioaddr = dev->base_addr = link->io.BasePort1;
 299     DEBUG(1,"arcnet: got ioaddr %Xh\n", ioaddr);
 300
 301     DEBUG(1,"arcnet: request IRQ %d (%Xh/%Xh)\n",
 302            link->irq.AssignedIRQ,
 303            link->irq.IRQInfo1, link->irq.IRQInfo2);
 304     i = pcmcia_request_irq(link, &link->irq);
 305     if (i != CS_SUCCESS)
 306     {
 307         DEBUG(1,"arcnet: requestIRQ failed totally!\n");
 308         goto failed;
 309     }
 310
 311     dev->irq = link->irq.AssignedIRQ;
 312
 313     CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
 314
 315     if (com20020_check(dev))
 316     {
 317         regdump(dev);
 318         goto failed;
 319     }
 320
 321     lp = dev->priv;
 322     lp->card_name = "PCMCIA COM20020";
 323     lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */
 324
 325     link->dev_node = &info->node;
 326     SET_NETDEV_DEV(dev, &handle_to_dev(link));
 327
 328     i = com20020_found(dev, 0); /* calls register_netdev */
 329
 330     if (i != 0) {
 331         DEBUG(1,KERN_NOTICE "com20020_cs: com20020_found() failed\n");
 332         link->dev_node = NULL;
 333         goto failed;
 334     }
 335
 336     strcpy(info->node.dev_name, dev->name);
 337
 338     DEBUG(1,KERN_INFO "%s: port %#3lx, irq %d\n",
 339            dev->name, dev->base_addr, dev->irq);
 340     return 0;
 341
 342 cs_failed:
 343     cs_error(link, last_fn, last_ret);
 344 failed:
 345     DEBUG(1,"com20020_config failed...\n");
 346     com20020_release(link);
 347     return -ENODEV;
 348 } /* com20020_config */
 349
 350 /*======================================================================
 351
 352     After a card is removed, com20020_release() will unregister the net
 353     device, and release the PCMCIA configuration.  If the device is
 354     still open, this will be postponed until it is closed.
 355
 356 ======================================================================*/
 357
 358 static void com20020_release(struct pcmcia_device *link)
 359 {
 360         DEBUG(0, "com20020_release(0x%p)\n", link);
 361         pcmcia_disable_device(link);
 362 }
 363
 364 static int com20020_suspend(struct pcmcia_device *link)
 365 {
 366         com20020_dev_t *info = link->priv;
 367         struct net_device *dev = info->dev;
 368
 369         if (link->open)
 370                 netif_device_detach(dev);
 371
 372         return 0;
 373 }
 374
 375 static int com20020_resume(struct pcmcia_device *link)
 376 {
 377         com20020_dev_t *info = link->priv;
 378         struct net_device *dev = info->dev;
 379
 380         if (link->open) {
 381                 int ioaddr = dev->base_addr;
 382                 struct arcnet_local *lp = dev->priv;
 383                 ARCRESET;
 384         }
 385
 386         return 0;
 387 }
 388
 389 static struct pcmcia_device_id com20020_ids[] = {
 390         PCMCIA_DEVICE_PROD_ID12("Contemporary Control Systems, Inc.", "PCM20 Arcnet Adapter", 0x59991666, 0x95dfffaf),
 391         PCMCIA_DEVICE_NULL
 392 };
 393 MODULE_DEVICE_TABLE(pcmcia, com20020_ids);
 394
 395 static struct pcmcia_driver com20020_cs_driver = {
 396         .owner          = THIS_MODULE,
 397         .drv            = {
 398                 .name   = "com20020_cs",
 399         },
 400         .probe          = com20020_probe,
 401         .remove         = com20020_detach,
 402         .id_table       = com20020_ids,
 403         .suspend        = com20020_suspend,
 404         .resume         = com20020_resume,
 405 };
 406
 407 static int __init init_com20020_cs(void)
 408 {
 409         return pcmcia_register_driver(&com20020_cs_driver);
 410 }
 411
 412 static void __exit exit_com20020_cs(void)
 413 {
 414         pcmcia_unregister_driver(&com20020_cs_driver);
 415 }
 416
 417 module_init(init_com20020_cs);
 418 module_exit(exit_com20020_cs);