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
 177     p_dev->irq.Instance = info->dev = dev;
 178     p_dev->priv = info;
 179
 180     return com20020_config(p_dev);
 181
 182 fail_alloc_dev:
 183     kfree(info);
 184 fail_alloc_info:
 185     return -ENOMEM;
 186 } /* com20020_attach */
 187
 188 /*======================================================================
 189
 190     This deletes a driver "instance".  The device is de-registered
 191     with Card Services.  If it has been released, all local data
 192     structures are freed.  Otherwise, the structures will be freed
 193     when the device is released.
 194
 195 ======================================================================*/
 196
 197 static void com20020_detach(struct pcmcia_device *link)
 198 {
 199     struct com20020_dev_t *info = link->priv;
 200     struct net_device *dev = info->dev;
 201
 202     DEBUG(1,"detach...\n");
 203
 204     DEBUG(0, "com20020_detach(0x%p)\n", link);
 205
 206     if (link->dev_node) {
 207         DEBUG(1,"unregister...\n");
 208
 209         unregister_netdev(dev);
 210
 211         /*
 212          * this is necessary because we register our IRQ separately
 213          * from card services.
 214          */
 215         if (dev->irq)
 216             free_irq(dev->irq, dev);
 217     }
 218
 219     com20020_release(link);
 220
 221     /* Unlink device structure, free bits */
 222     DEBUG(1,"unlinking...\n");
 223     if (link->priv)
 224     {
 225         dev = info->dev;
 226         if (dev)
 227         {
 228             DEBUG(1,"kfree...\n");
 229             free_netdev(dev);
 230         }
 231         DEBUG(1,"kfree2...\n");
 232         kfree(info);
 233     }
 234
 235 } /* com20020_detach */
 236
 237 /*======================================================================
 238
 239     com20020_config() is scheduled to run after a CARD_INSERTION event
 240     is received, to configure the PCMCIA socket, and to make the
 241     device available to the system.
 242
 243 ======================================================================*/
 244
 245 #define CS_CHECK(fn, ret) \
 246 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
 247
 248 static int com20020_config(struct pcmcia_device *link)
 249 {
 250     struct arcnet_local *lp;
 251     com20020_dev_t *info;
 252     struct net_device *dev;
 253     int i, last_ret, last_fn;
 254     int ioaddr;
 255
 256     info = link->priv;
 257     dev = info->dev;
 258
 259     DEBUG(1,"config...\n");
 260
 261     DEBUG(0, "com20020_config(0x%p)\n", link);
 262
 263     DEBUG(1,"arcnet: baseport1 is %Xh\n", link->io.BasePort1);
 264     i = !CS_SUCCESS;
 265     if (!link->io.BasePort1)
 266     {
 267         for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10)
 268         {
 269             link->io.BasePort1 = ioaddr;
 270             i = pcmcia_request_io(link, &link->io);
 271             if (i == CS_SUCCESS)
 272                 break;
 273         }
 274     }
 275     else
 276         i = pcmcia_request_io(link, &link->io);
 277
 278     if (i != CS_SUCCESS)
 279     {
 280         DEBUG(1,"arcnet: requestIO failed totally!\n");
 281         goto failed;
 282     }
 283
 284     ioaddr = dev->base_addr = link->io.BasePort1;
 285     DEBUG(1,"arcnet: got ioaddr %Xh\n", ioaddr);
 286
 287     DEBUG(1,"arcnet: request IRQ %d (%Xh/%Xh)\n",
 288            link->irq.AssignedIRQ,
 289            link->irq.IRQInfo1, link->irq.IRQInfo2);
 290     i = pcmcia_request_irq(link, &link->irq);
 291     if (i != CS_SUCCESS)
 292     {
 293         DEBUG(1,"arcnet: requestIRQ failed totally!\n");
 294         goto failed;
 295     }
 296
 297     dev->irq = link->irq.AssignedIRQ;
 298
 299     CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
 300
 301     if (com20020_check(dev))
 302     {
 303         regdump(dev);
 304         goto failed;
 305     }
 306
 307     lp = dev->priv;
 308     lp->card_name = "PCMCIA COM20020";
 309     lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */
 310
 311     link->dev_node = &info->node;
 312     SET_NETDEV_DEV(dev, &handle_to_dev(link));
 313
 314     i = com20020_found(dev, 0); /* calls register_netdev */
 315
 316     if (i != 0) {
 317         DEBUG(1,KERN_NOTICE "com20020_cs: com20020_found() failed\n");
 318         link->dev_node = NULL;
 319         goto failed;
 320     }
 321
 322     strcpy(info->node.dev_name, dev->name);
 323
 324     DEBUG(1,KERN_INFO "%s: port %#3lx, irq %d\n",
 325            dev->name, dev->base_addr, dev->irq);
 326     return 0;
 327
 328 cs_failed:
 329     cs_error(link, last_fn, last_ret);
 330 failed:
 331     DEBUG(1,"com20020_config failed...\n");
 332     com20020_release(link);
 333     return -ENODEV;
 334 } /* com20020_config */
 335
 336 /*======================================================================
 337
 338     After a card is removed, com20020_release() will unregister the net
 339     device, and release the PCMCIA configuration.  If the device is
 340     still open, this will be postponed until it is closed.
 341
 342 ======================================================================*/
 343
 344 static void com20020_release(struct pcmcia_device *link)
 345 {
 346         DEBUG(0, "com20020_release(0x%p)\n", link);
 347         pcmcia_disable_device(link);
 348 }
 349
 350 static int com20020_suspend(struct pcmcia_device *link)
 351 {
 352         com20020_dev_t *info = link->priv;
 353         struct net_device *dev = info->dev;
 354
 355         if (link->open)
 356                 netif_device_detach(dev);
 357
 358         return 0;
 359 }
 360
 361 static int com20020_resume(struct pcmcia_device *link)
 362 {
 363         com20020_dev_t *info = link->priv;
 364         struct net_device *dev = info->dev;
 365
 366         if (link->open) {
 367                 int ioaddr = dev->base_addr;
 368                 struct arcnet_local *lp = dev->priv;
 369                 ARCRESET;
 370         }
 371
 372         return 0;
 373 }
 374
 375 static struct pcmcia_device_id com20020_ids[] = {
 376         PCMCIA_DEVICE_PROD_ID12("Contemporary Control Systems, Inc.",
 377                         "PCM20 Arcnet Adapter", 0x59991666, 0x95dfffaf),
 378         PCMCIA_DEVICE_PROD_ID12("SoHard AG",
 379                         "SH ARC PCMCIA", 0xf8991729, 0x69dff0c7),
 380         PCMCIA_DEVICE_NULL
 381 };
 382 MODULE_DEVICE_TABLE(pcmcia, com20020_ids);
 383
 384 static struct pcmcia_driver com20020_cs_driver = {
 385         .owner          = THIS_MODULE,
 386         .drv            = {
 387                 .name   = "com20020_cs",
 388         },
 389         .probe          = com20020_probe,
 390         .remove         = com20020_detach,
 391         .id_table       = com20020_ids,
 392         .suspend        = com20020_suspend,
 393         .resume         = com20020_resume,
 394 };
 395
 396 static int __init init_com20020_cs(void)
 397 {
 398         return pcmcia_register_driver(&com20020_cs_driver);
 399 }
 400
 401 static void __exit exit_com20020_cs(void)
 402 {
 403         pcmcia_unregister_driver(&com20020_cs_driver);
 404 }
 405
 406 module_init(init_com20020_cs);
 407 module_exit(exit_com20020_cs);