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
  35 #define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
  36
  37 #include <linux/kernel.h>
  38 #include <linux/ptrace.h>
  39 #include <linux/slab.h>
  40 #include <linux/string.h>
  41 #include <linux/timer.h>
  42 #include <linux/delay.h>
  43 #include <linux/module.h>
  44 #include <linux/netdevice.h>
  45 #include <linux/io.h>
  46 #include <pcmcia/cistpl.h>
  47 #include <pcmcia/ds.h>
  48
  49 #include "arcdevice.h"
  50 #include "com20020.h"
  51
  52 static void regdump(struct net_device *dev)
  53 {
  54 #ifdef DEBUG
  55         int ioaddr = dev->base_addr;
  56         int count;
  57
  58         netdev_dbg(dev, "register dump:\n");
  59         for (count = 0; count < 16; count++) {
  60                 if (!(count % 16))
  61                         pr_cont("%04X:", ioaddr + count);
  62                 pr_cont(" %02X", arcnet_inb(ioaddr, count));
  63         }
  64         pr_cont("\n");
  65
  66         netdev_dbg(dev, "buffer0 dump:\n");
  67         /* set up the address register */
  68         count = 0;
  69         arcnet_outb((count >> 8) | RDDATAflag | AUTOINCflag,
  70                     ioaddr, COM20020_REG_W_ADDR_HI);
  71         arcnet_outb(count & 0xff, ioaddr, COM20020_REG_W_ADDR_LO);
  72
  73         for (count = 0; count < 256 + 32; count++) {
  74                 if (!(count % 16))
  75                         pr_cont("%04X:", count);
  76
  77                 /* copy the data */
  78                 pr_cont(" %02X", arcnet_inb(ioaddr, COM20020_REG_RW_MEMDATA));
  79         }
  80         pr_cont("\n");
  81 #endif
  82 }
  83
  84 /*====================================================================*/
  85
  86 /* Parameters that can be set with 'insmod' */
  87
  88 static int node;
  89 static int timeout = 3;
  90 static int backplane;
  91 static int clockp;
  92 static int clockm;
  93
  94 module_param(node, int, 0);
  95 module_param(timeout, int, 0);
  96 module_param(backplane, int, 0);
  97 module_param(clockp, int, 0);
  98 module_param(clockm, int, 0);
  99
 100 MODULE_DESCRIPTION("ARCnet COM20020 chipset PCMCIA driver");
 101 MODULE_LICENSE("GPL");
 102
 103 /*====================================================================*/
 104
 105 static int com20020_config(struct pcmcia_device *link);
 106 static void com20020_release(struct pcmcia_device *link);
 107
 108 static void com20020_detach(struct pcmcia_device *p_dev);
 109
 110 /*====================================================================*/
 111
 112 static int com20020_probe(struct pcmcia_device *p_dev)
 113 {
 114         struct com20020_dev *info;
 115         struct net_device *dev;
 116         struct arcnet_local *lp;
 117         int ret = -ENOMEM;
 118
 119         dev_dbg(&p_dev->dev, "com20020_attach()\n");
 120
 121         /* Create new network device */
 122         info = kzalloc(sizeof(*info), GFP_KERNEL);
 123         if (!info)
 124                 goto fail_alloc_info;
 125
 126         dev = alloc_arcdev("");
 127         if (!dev)
 128                 goto fail_alloc_dev;
 129
 130         lp = netdev_priv(dev);
 131         lp->timeout = timeout;
 132         lp->backplane = backplane;
 133         lp->clockp = clockp;
 134         lp->clockm = clockm & 3;
 135         lp->hw.owner = THIS_MODULE;
 136
 137         /* fill in our module parameters as defaults */
 138         arcnet_set_addr(dev, node);
 139
 140         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
 141         p_dev->resource[0]->end = 16;
 142         p_dev->config_flags |= CONF_ENABLE_IRQ;
 143
 144         info->dev = dev;
 145         p_dev->priv = info;
 146
 147         ret = com20020_config(p_dev);
 148         if (ret)
 149                 goto fail_config;
 150
 151         return 0;
 152
 153 fail_config:
 154         free_arcdev(dev);
 155 fail_alloc_dev:
 156         kfree(info);
 157 fail_alloc_info:
 158         return ret;
 159 } /* com20020_attach */
 160
 161 static void com20020_detach(struct pcmcia_device *link)
 162 {
 163         struct com20020_dev *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         /* this is necessary because we register our IRQ separately
 175          * from card services.
 176          */
 177         if (dev->irq)
 178                 free_irq(dev->irq, dev);
 179
 180         com20020_release(link);
 181
 182         /* Unlink device structure, free bits */
 183         dev_dbg(&link->dev, "unlinking...\n");
 184         if (link->priv) {
 185                 dev = info->dev;
 186                 if (dev) {
 187                         dev_dbg(&link->dev, "kfree...\n");
 188                         free_arcdev(dev);
 189                 }
 190                 dev_dbg(&link->dev, "kfree2...\n");
 191                 kfree(info);
 192         }
 193
 194 } /* com20020_detach */
 195
 196 static int com20020_config(struct pcmcia_device *link)
 197 {
 198         struct arcnet_local *lp;
 199         struct com20020_dev *info;
 200         struct net_device *dev;
 201         int i, ret;
 202         int ioaddr;
 203
 204         info = link->priv;
 205         dev = info->dev;
 206
 207         dev_dbg(&link->dev, "config...\n");
 208
 209         dev_dbg(&link->dev, "com20020_config\n");
 210
 211         dev_dbg(&link->dev, "baseport1 is %Xh\n",
 212                 (unsigned int)link->resource[0]->start);
 213
 214         i = -ENODEV;
 215         link->io_lines = 16;
 216
 217         if (!link->resource[0]->start) {
 218                 for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10) {
 219                         link->resource[0]->start = ioaddr;
 220                         i = pcmcia_request_io(link);
 221                         if (i == 0)
 222                                 break;
 223                 }
 224         } else {
 225                 i = pcmcia_request_io(link);
 226         }
 227
 228         if (i != 0) {
 229                 dev_dbg(&link->dev, "requestIO failed totally!\n");
 230                 goto failed;
 231         }
 232
 233         ioaddr = dev->base_addr = link->resource[0]->start;
 234         dev_dbg(&link->dev, "got ioaddr %Xh\n", ioaddr);
 235
 236         dev_dbg(&link->dev, "request IRQ %d\n",
 237                 link->irq);
 238         if (!link->irq) {
 239                 dev_dbg(&link->dev, "requestIRQ failed totally!\n");
 240                 goto failed;
 241         }
 242
 243         dev->irq = link->irq;
 244
 245         ret = pcmcia_enable_device(link);
 246         if (ret)
 247                 goto failed;
 248
 249         if (com20020_check(dev)) {
 250                 regdump(dev);
 251                 goto failed;
 252         }
 253
 254         lp = netdev_priv(dev);
 255         lp->card_name = "PCMCIA COM20020";
 256         lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */
 257
 258         SET_NETDEV_DEV(dev, &link->dev);
 259
 260         i = com20020_found(dev, 0);     /* calls register_netdev */
 261
 262         if (i != 0) {
 263                 dev_notice(&link->dev,
 264                            "com20020_found() failed\n");
 265                 goto failed;
 266         }
 267
 268         netdev_dbg(dev, "port %#3lx, irq %d\n",
 269                    dev->base_addr, dev->irq);
 270         return 0;
 271
 272 failed:
 273         dev_dbg(&link->dev, "com20020_config failed...\n");
 274         com20020_release(link);
 275         return -ENODEV;
 276 } /* com20020_config */
 277
 278 static void com20020_release(struct pcmcia_device *link)
 279 {
 280         dev_dbg(&link->dev, "com20020_release\n");
 281         pcmcia_disable_device(link);
 282 }
 283
 284 static int com20020_suspend(struct pcmcia_device *link)
 285 {
 286         struct com20020_dev *info = link->priv;
 287         struct net_device *dev = info->dev;
 288
 289         if (link->open)
 290                 netif_device_detach(dev);
 291
 292         return 0;
 293 }
 294
 295 static int com20020_resume(struct pcmcia_device *link)
 296 {
 297         struct com20020_dev *info = link->priv;
 298         struct net_device *dev = info->dev;
 299
 300         if (link->open) {
 301                 int ioaddr = dev->base_addr;
 302                 struct arcnet_local *lp = netdev_priv(dev);
 303
 304                 arcnet_outb(lp->config | 0x80, ioaddr, COM20020_REG_W_CONFIG);
 305                 udelay(5);
 306                 arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
 307         }
 308
 309         return 0;
 310 }
 311
 312 static const struct pcmcia_device_id com20020_ids[] = {
 313         PCMCIA_DEVICE_PROD_ID12("Contemporary Control Systems, Inc.",
 314                                 "PCM20 Arcnet Adapter", 0x59991666, 0x95dfffaf),
 315         PCMCIA_DEVICE_PROD_ID12("SoHard AG",
 316                                 "SH ARC PCMCIA", 0xf8991729, 0x69dff0c7),
 317         PCMCIA_DEVICE_NULL
 318 };
 319 MODULE_DEVICE_TABLE(pcmcia, com20020_ids);
 320
 321 static struct pcmcia_driver com20020_cs_driver = {
 322         .owner          = THIS_MODULE,
 323         .name           = "com20020_cs",
 324         .probe          = com20020_probe,
 325         .remove         = com20020_detach,
 326         .id_table       = com20020_ids,
 327         .suspend        = com20020_suspend,
 328         .resume         = com20020_resume,
 329 };
 330 module_pcmcia_driver(com20020_cs_driver);