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/ptrace.h>
  36 #include <linux/slab.h>
  37 #include <linux/string.h>
  38 #include <linux/timer.h>
  39 #include <linux/delay.h>
  40 #include <linux/module.h>
  41 #include <linux/netdevice.h>
  42 #include <linux/arcdevice.h>
  43 #include <linux/com20020.h>
  44
  45 #include <pcmcia/cistpl.h>
  46 #include <pcmcia/ds.h>
  47
  48 #include <asm/io.h>
  49
  50 #define VERSION "arcnet: COM20020 PCMCIA support loaded.\n"
  51
  52
  53 static void regdump(struct net_device *dev)
  54 {
  55 #ifdef DEBUG
  56     int ioaddr = dev->base_addr;
  57     int count;
  58
  59     netdev_dbg(dev, "register dump:\n");
  60     for (count = ioaddr; count < ioaddr + 16; count++)
  61     {
  62         if (!(count % 16))
  63             pr_cont("%04X:", count);
  64         pr_cont(" %02X", inb(count));
  65     }
  66     pr_cont("\n");
  67
  68     netdev_dbg(dev, "buffer0 dump:\n");
  69         /* set up the address register */
  70         count = 0;
  71         outb((count >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI);
  72         outb(count & 0xff, _ADDR_LO);
  73
  74     for (count = 0; count < 256+32; count++)
  75     {
  76         if (!(count % 16))
  77             pr_cont("%04X:", count);
  78
  79         /* copy the data */
  80         pr_cont(" %02X", inb(_MEMDATA));
  81     }
  82     pr_cont("\n");
  83 #endif
  84 }
  85
  86
  87
  88 /*====================================================================*/
  89
  90 /* Parameters that can be set with 'insmod' */
  91
  92 static int node;
  93 static int timeout = 3;
  94 static int backplane;
  95 static int clockp;
  96 static int clockm;
  97
  98 module_param(node, int, 0);
  99 module_param(timeout, int, 0);
 100 module_param(backplane, int, 0);
 101 module_param(clockp, int, 0);
 102 module_param(clockm, int, 0);
 103
 104 MODULE_LICENSE("GPL");
 105
 106 /*====================================================================*/
 107
 108 static int com20020_config(struct pcmcia_device *link);
 109 static void com20020_release(struct pcmcia_device *link);
 110
 111 static void com20020_detach(struct pcmcia_device *p_dev);
 112
 113 /*====================================================================*/
 114
 115 typedef struct com20020_dev_t {
 116     struct net_device       *dev;
 117 } com20020_dev_t;
 118
 119 static int com20020_probe(struct pcmcia_device *p_dev)
 120 {
 121     com20020_dev_t *info;
 122     struct net_device *dev;
 123     struct arcnet_local *lp;
 124
 125     dev_dbg(&p_dev->dev, "com20020_attach()\n");
 126
 127     /* Create new network device */
 128     info = kzalloc(sizeof(struct com20020_dev_t), GFP_KERNEL);
 129     if (!info)
 130         goto fail_alloc_info;
 131
 132     dev = alloc_arcdev("");
 133     if (!dev)
 134         goto fail_alloc_dev;
 135
 136     lp = netdev_priv(dev);
 137     lp->timeout = timeout;
 138     lp->backplane = backplane;
 139     lp->clockp = clockp;
 140     lp->clockm = clockm & 3;
 141     lp->hw.owner = THIS_MODULE;
 142
 143     /* fill in our module parameters as defaults */
 144     dev->dev_addr[0] = node;
 145
 146     p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
 147     p_dev->resource[0]->end = 16;
 148     p_dev->config_flags |= CONF_ENABLE_IRQ;
 149
 150     info->dev = dev;
 151     p_dev->priv = info;
 152
 153     return com20020_config(p_dev);
 154
 155 fail_alloc_dev:
 156     kfree(info);
 157 fail_alloc_info:
 158     return -ENOMEM;
 159 } /* com20020_attach */
 160
 161 static void com20020_detach(struct pcmcia_device *link)
 162 {
 163     struct com20020_dev_t *info = link->priv;
 164     struct net_device *dev = info->dev;
 165
 166     dev_dbg(&link->dev, "detach...\n");
 167
 168     dev_dbg(&link->dev, "com20020_detach\n");
 169
 170     dev_dbg(&link->dev, "unregister...\n");
 171
 172     unregister_netdev(dev);
 173
 174     /*
 175      * this is necessary because we register our IRQ separately
 176      * from card services.
 177      */
 178     if (dev->irq)
 179             free_irq(dev->irq, dev);
 180
 181     com20020_release(link);
 182
 183     /* Unlink device structure, free bits */
 184     dev_dbg(&link->dev, "unlinking...\n");
 185     if (link->priv)
 186     {
 187         dev = info->dev;
 188         if (dev)
 189         {
 190             dev_dbg(&link->dev, "kfree...\n");
 191             free_netdev(dev);
 192         }
 193         dev_dbg(&link->dev, "kfree2...\n");
 194         kfree(info);
 195     }
 196
 197 } /* com20020_detach */
 198
 199 static int com20020_config(struct pcmcia_device *link)
 200 {
 201     struct arcnet_local *lp;
 202     com20020_dev_t *info;
 203     struct net_device *dev;
 204     int i, ret;
 205     int ioaddr;
 206
 207     info = link->priv;
 208     dev = info->dev;
 209
 210     dev_dbg(&link->dev, "config...\n");
 211
 212     dev_dbg(&link->dev, "com20020_config\n");
 213
 214     dev_dbg(&link->dev, "baseport1 is %Xh\n",
 215             (unsigned int) link->resource[0]->start);
 216
 217     i = -ENODEV;
 218     link->io_lines = 16;
 219
 220     if (!link->resource[0]->start)
 221     {
 222         for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10)
 223         {
 224             link->resource[0]->start = ioaddr;
 225             i = pcmcia_request_io(link);
 226             if (i == 0)
 227                 break;
 228         }
 229     }
 230     else
 231         i = pcmcia_request_io(link);
 232
 233     if (i != 0)
 234     {
 235         dev_dbg(&link->dev, "requestIO failed totally!\n");
 236         goto failed;
 237     }
 238
 239     ioaddr = dev->base_addr = link->resource[0]->start;
 240     dev_dbg(&link->dev, "got ioaddr %Xh\n", ioaddr);
 241
 242     dev_dbg(&link->dev, "request IRQ %d\n",
 243             link->irq);
 244     if (!link->irq)
 245     {
 246         dev_dbg(&link->dev, "requestIRQ failed totally!\n");
 247         goto failed;
 248     }
 249
 250     dev->irq = link->irq;
 251
 252     ret = pcmcia_enable_device(link);
 253     if (ret)
 254             goto failed;
 255
 256     if (com20020_check(dev))
 257     {
 258         regdump(dev);
 259         goto failed;
 260     }
 261
 262     lp = netdev_priv(dev);
 263     lp->card_name = "PCMCIA COM20020";
 264     lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */
 265
 266     SET_NETDEV_DEV(dev, &link->dev);
 267
 268     i = com20020_found(dev, 0); /* calls register_netdev */
 269
 270     if (i != 0) {
 271         dev_notice(&link->dev,
 272                    "com20020_found() failed\n");
 273         goto failed;
 274     }
 275
 276     netdev_dbg(dev, "port %#3lx, irq %d\n",
 277                dev->base_addr, dev->irq);
 278     return 0;
 279
 280 failed:
 281     dev_dbg(&link->dev, "com20020_config failed...\n");
 282     com20020_release(link);
 283     return -ENODEV;
 284 } /* com20020_config */
 285
 286 static void com20020_release(struct pcmcia_device *link)
 287 {
 288         dev_dbg(&link->dev, "com20020_release\n");
 289         pcmcia_disable_device(link);
 290 }
 291
 292 static int com20020_suspend(struct pcmcia_device *link)
 293 {
 294         com20020_dev_t *info = link->priv;
 295         struct net_device *dev = info->dev;
 296
 297         if (link->open)
 298                 netif_device_detach(dev);
 299
 300         return 0;
 301 }
 302
 303 static int com20020_resume(struct pcmcia_device *link)
 304 {
 305         com20020_dev_t *info = link->priv;
 306         struct net_device *dev = info->dev;
 307
 308         if (link->open) {
 309                 int ioaddr = dev->base_addr;
 310                 struct arcnet_local *lp = netdev_priv(dev);
 311                 ARCRESET;
 312         }
 313
 314         return 0;
 315 }
 316
 317 static const struct pcmcia_device_id com20020_ids[] = {
 318         PCMCIA_DEVICE_PROD_ID12("Contemporary Control Systems, Inc.",
 319                         "PCM20 Arcnet Adapter", 0x59991666, 0x95dfffaf),
 320         PCMCIA_DEVICE_PROD_ID12("SoHard AG",
 321                         "SH ARC PCMCIA", 0xf8991729, 0x69dff0c7),
 322         PCMCIA_DEVICE_NULL
 323 };
 324 MODULE_DEVICE_TABLE(pcmcia, com20020_ids);
 325
 326 static struct pcmcia_driver com20020_cs_driver = {
 327         .owner          = THIS_MODULE,
 328         .name           = "com20020_cs",
 329         .probe          = com20020_probe,
 330         .remove         = com20020_detach,
 331         .id_table       = com20020_ids,
 332         .suspend        = com20020_suspend,
 333         .resume         = com20020_resume,
 334 };
 335 module_pcmcia_driver(com20020_cs_driver);