release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/net/wireless/airo_cs.c

   1 /*======================================================================
   2
   3     Aironet driver for 4500 and 4800 series cards
   4
   5     This code is released under both the GPL version 2 and BSD licenses.
   6     Either license may be used.  The respective licenses are found at
   7     the end of this file.
   8
   9     This code was developed by Benjamin Reed <breed@users.sourceforge.net>
  10     including portions of which come from the Aironet PC4500
  11     Developer's Reference Manual and used with permission.  Copyright
  12     (C) 1999 Benjamin Reed.  All Rights Reserved.  Permission to use
  13     code in the Developer's manual was granted for this driver by
  14     Aironet.
  15
  16     In addition this module was derived from dummy_cs.
  17     The initial developer of dummy_cs is David A. Hinds
  18     <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  19     are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  20
  21 ======================================================================*/
  22
  23 #ifdef __IN_PCMCIA_PACKAGE__
  24 #include <pcmcia/k_compat.h>
  25 #endif
  26 #include <linux/init.h>
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/ptrace.h>
  30 #include <linux/slab.h>
  31 #include <linux/string.h>
  32 #include <linux/timer.h>
  33 #include <linux/netdevice.h>
  34
  35 #include <pcmcia/cs.h>
  36 #include <pcmcia/cistpl.h>
  37 #include <pcmcia/cisreg.h>
  38 #include <pcmcia/ds.h>
  39
  40 #include <linux/io.h>
  41 #include <asm/system.h>
  42
  43 #include "airo.h"
  44
  45
  46 /*====================================================================*/
  47
  48 MODULE_AUTHOR("Benjamin Reed");
  49 MODULE_DESCRIPTION("Support for Cisco/Aironet 802.11 wireless ethernet "
  50                    "cards.  This is the module that links the PCMCIA card "
  51                    "with the airo module.");
  52 MODULE_LICENSE("Dual BSD/GPL");
  53 MODULE_SUPPORTED_DEVICE("Aironet 4500, 4800 and Cisco 340 PCMCIA cards");
  54
  55 /*====================================================================*/
  56
  57 /*
  58    The event() function is this driver's Card Services event handler.
  59    It will be called by Card Services when an appropriate card status
  60    event is received.  The config() and release() entry points are
  61    used to configure or release a socket, in response to card
  62    insertion and ejection events.  They are invoked from the airo_cs
  63    event handler.
  64 */
  65
  66 static int airo_config(struct pcmcia_device *link);
  67 static void airo_release(struct pcmcia_device *link);
  68
  69 /*
  70    The attach() and detach() entry points are used to create and destroy
  71    "instances" of the driver, where each instance represents everything
  72    needed to manage one actual PCMCIA card.
  73 */
  74
  75 static void airo_detach(struct pcmcia_device *p_dev);
  76
  77 typedef struct local_info_t {
  78         struct net_device *eth_dev;
  79 } local_info_t;
  80
  81 /*======================================================================
  82
  83   airo_attach() creates an "instance" of the driver, allocating
  84   local data structures for one device.  The device is registered
  85   with Card Services.
  86
  87   The dev_link structure is initialized, but we don't actually
  88   configure the card at this point -- we wait until we receive a
  89   card insertion event.
  90
  91   ======================================================================*/
  92
  93 static int airo_probe(struct pcmcia_device *p_dev)
  94 {
  95         local_info_t *local;
  96
  97         dev_dbg(&p_dev->dev, "airo_attach()\n");
  98
  99         /*
 100           General socket configuration defaults can go here.  In this
 101           client, we assume very little, and rely on the CIS for almost
 102           everything.  In most clients, many details (i.e., number, sizes,
 103           and attributes of IO windows) are fixed by the nature of the
 104           device, and can be hard-wired here.
 105         */
 106         p_dev->conf.Attributes = 0;
 107         p_dev->conf.IntType = INT_MEMORY_AND_IO;
 108
 109         /* Allocate space for private device-specific data */
 110         local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 111         if (!local) {
 112                 printk(KERN_ERR "airo_cs: no memory for new device\n");
 113                 return -ENOMEM;
 114         }
 115         p_dev->priv = local;
 116
 117         return airo_config(p_dev);
 118 } /* airo_attach */
 119
 120 /*======================================================================
 121
 122   This deletes a driver "instance".  The device is de-registered
 123   with Card Services.  If it has been released, all local data
 124   structures are freed.  Otherwise, the structures will be freed
 125   when the device is released.
 126
 127   ======================================================================*/
 128
 129 static void airo_detach(struct pcmcia_device *link)
 130 {
 131         dev_dbg(&link->dev, "airo_detach\n");
 132
 133         airo_release(link);
 134
 135         if (((local_info_t *)link->priv)->eth_dev) {
 136                 stop_airo_card(((local_info_t *)link->priv)->eth_dev, 0);
 137         }
 138         ((local_info_t *)link->priv)->eth_dev = NULL;
 139
 140         kfree(link->priv);
 141 } /* airo_detach */
 142
 143 /*======================================================================
 144
 145   airo_config() is scheduled to run after a CARD_INSERTION event
 146   is received, to configure the PCMCIA socket, and to make the
 147   device available to the system.
 148
 149   ======================================================================*/
 150
 151 static int airo_cs_config_check(struct pcmcia_device *p_dev,
 152                                 cistpl_cftable_entry_t *cfg,
 153                                 cistpl_cftable_entry_t *dflt,
 154                                 unsigned int vcc,
 155                                 void *priv_data)
 156 {
 157         if (cfg->index == 0)
 158                 return -ENODEV;
 159
 160         /* Does this card need audio output? */
 161         if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
 162                 p_dev->conf.Attributes |= CONF_ENABLE_SPKR;
 163                 p_dev->conf.Status = CCSR_AUDIO_ENA;
 164         }
 165
 166         /* Use power settings for Vcc and Vpp if present */
 167         /*  Note that the CIS values need to be rescaled */
 168         if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
 169                 p_dev->conf.Vpp = cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
 170         else if (dflt->vpp1.present & (1<<CISTPL_POWER_VNOM))
 171                 p_dev->conf.Vpp = dflt->vpp1.param[CISTPL_POWER_VNOM]/10000;
 172
 173         p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
 174
 175         /* IO window settings */
 176         p_dev->resource[0]->end = p_dev->resource[1]->end = 0;
 177         if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
 178                 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
 179                 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
 180                 p_dev->resource[0]->flags |=
 181                                         pcmcia_io_cfg_data_width(io->flags);
 182                 p_dev->resource[0]->start = io->win[0].base;
 183                 p_dev->resource[0]->end = io->win[0].len;
 184                 if (io->nwin > 1) {
 185                         p_dev->resource[1]->flags = p_dev->resource[0]->flags;
 186                         p_dev->resource[1]->start = io->win[1].base;
 187                         p_dev->resource[1]->end = io->win[1].len;
 188                 }
 189         }
 190
 191         /* This reserves IO space but doesn't actually enable it */
 192         if (pcmcia_request_io(p_dev) != 0)
 193                 return -ENODEV;
 194
 195         /* If we got this far, we're cool! */
 196         return 0;
 197 }
 198
 199
 200 static int airo_config(struct pcmcia_device *link)
 201 {
 202         local_info_t *dev;
 203         int ret;
 204
 205         dev = link->priv;
 206
 207         dev_dbg(&link->dev, "airo_config\n");
 208
 209         /*
 210          * In this loop, we scan the CIS for configuration table
 211          * entries, each of which describes a valid card
 212          * configuration, including voltage, IO window, memory window,
 213          * and interrupt settings.
 214          *
 215          * We make no assumptions about the card to be configured: we
 216          * use just the information available in the CIS.  In an ideal
 217          * world, this would work for any PCMCIA card, but it requires
 218          * a complete and accurate CIS.  In practice, a driver usually
 219          * "knows" most of these things without consulting the CIS,
 220          * and most client drivers will only use the CIS to fill in
 221          * implementation-defined details.
 222          */
 223         ret = pcmcia_loop_config(link, airo_cs_config_check, NULL);
 224         if (ret)
 225                 goto failed;
 226
 227         if (!link->irq)
 228                 goto failed;
 229
 230         /*
 231           This actually configures the PCMCIA socket -- setting up
 232           the I/O windows and the interrupt mapping, and putting the
 233           card and host interface into "Memory and IO" mode.
 234         */
 235         ret = pcmcia_request_configuration(link, &link->conf);
 236         if (ret)
 237                 goto failed;
 238         ((local_info_t *)link->priv)->eth_dev =
 239                 init_airo_card(link->irq,
 240                                link->resource[0]->start, 1, &link->dev);
 241         if (!((local_info_t *)link->priv)->eth_dev)
 242                 goto failed;
 243
 244         /* Finally, report what we've done */
 245         dev_info(&link->dev, "index 0x%02x: ",
 246                link->conf.ConfigIndex);
 247         if (link->conf.Vpp)
 248                 printk(", Vpp %d.%d", link->conf.Vpp/10, link->conf.Vpp%10);
 249         printk(", irq %d", link->irq);
 250         if (link->resource[0])
 251                 printk(" & %pR", link->resource[0]);
 252         if (link->resource[1])
 253                 printk(" & %pR", link->resource[1]);
 254         printk("\n");
 255         return 0;
 256
 257  failed:
 258         airo_release(link);
 259         return -ENODEV;
 260 } /* airo_config */
 261
 262 /*======================================================================
 263
 264   After a card is removed, airo_release() will unregister the
 265   device, and release the PCMCIA configuration.  If the device is
 266   still open, this will be postponed until it is closed.
 267
 268   ======================================================================*/
 269
 270 static void airo_release(struct pcmcia_device *link)
 271 {
 272         dev_dbg(&link->dev, "airo_release\n");
 273         pcmcia_disable_device(link);
 274 }
 275
 276 static int airo_suspend(struct pcmcia_device *link)
 277 {
 278         local_info_t *local = link->priv;
 279
 280         netif_device_detach(local->eth_dev);
 281
 282         return 0;
 283 }
 284
 285 static int airo_resume(struct pcmcia_device *link)
 286 {
 287         local_info_t *local = link->priv;
 288
 289         if (link->open) {
 290                 reset_airo_card(local->eth_dev);
 291                 netif_device_attach(local->eth_dev);
 292         }
 293
 294         return 0;
 295 }
 296
 297 static struct pcmcia_device_id airo_ids[] = {
 298         PCMCIA_DEVICE_MANF_CARD(0x015f, 0x000a),
 299         PCMCIA_DEVICE_MANF_CARD(0x015f, 0x0005),
 300         PCMCIA_DEVICE_MANF_CARD(0x015f, 0x0007),
 301         PCMCIA_DEVICE_MANF_CARD(0x0105, 0x0007),
 302         PCMCIA_DEVICE_NULL,
 303 };
 304 MODULE_DEVICE_TABLE(pcmcia, airo_ids);
 305
 306 static struct pcmcia_driver airo_driver = {
 307         .owner          = THIS_MODULE,
 308         .drv            = {
 309                 .name   = "airo_cs",
 310         },
 311         .probe          = airo_probe,
 312         .remove         = airo_detach,
 313         .id_table       = airo_ids,
 314         .suspend        = airo_suspend,
 315         .resume         = airo_resume,
 316 };
 317
 318 static int airo_cs_init(void)
 319 {
 320         return pcmcia_register_driver(&airo_driver);
 321 }
 322
 323 static void airo_cs_cleanup(void)
 324 {
 325         pcmcia_unregister_driver(&airo_driver);
 326 }
 327
 328 /*
 329     This program is free software; you can redistribute it and/or
 330     modify it under the terms of the GNU General Public License
 331     as published by the Free Software Foundation; either version 2
 332     of the License, or (at your option) any later version.
 333
 334     This program is distributed in the hope that it will be useful,
 335     but WITHOUT ANY WARRANTY; without even the implied warranty of
 336     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 337     GNU General Public License for more details.
 338
 339     In addition:
 340
 341     Redistribution and use in source and binary forms, with or without
 342     modification, are permitted provided that the following conditions
 343     are met:
 344
 345     1. Redistributions of source code must retain the above copyright
 346        notice, this list of conditions and the following disclaimer.
 347     2. Redistributions in binary form must reproduce the above copyright
 348        notice, this list of conditions and the following disclaimer in the
 349        documentation and/or other materials provided with the distribution.
 350     3. The name of the author may not be used to endorse or promote
 351        products derived from this software without specific prior written
 352        permission.
 353
 354     THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 355     IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 356     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 357     ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 358     INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 359     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 360     SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 361     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 362     STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 363     IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 364     POSSIBILITY OF SUCH DAMAGE.
 365 */
 366
 367 module_init(airo_cs_init);
 368 module_exit(airo_cs_cleanup);