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

   1 /*** -*- linux-c -*- **********************************************************
   2
   3      Driver for Atmel at76c502 at76c504 and at76c506 wireless cards.
   4
   5         Copyright 2000-2001 ATMEL Corporation.
   6         Copyright 2003 Simon Kelley.
   7
   8     This code was developed from version 2.1.1 of the Atmel drivers,
   9     released by Atmel corp. under the GPL in December 2002. It also
  10     includes code from the Linux aironet drivers (C) Benjamin Reed,
  11     and the Linux PCMCIA package, (C) David Hinds.
  12
  13     For all queries about this code, please contact the current author,
  14     Simon Kelley <simon@thekelleys.org.uk> and not Atmel Corporation.
  15
  16     This program is free software; you can redistribute it and/or modify
  17     it under the terms of the GNU General Public License as published by
  18     the Free Software Foundation; either version 2 of the License, or
  19     (at your option) any later version.
  20
  21     This software is distributed in the hope that it will be useful,
  22     but WITHOUT ANY WARRANTY; without even the implied warranty of
  23     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24     GNU General Public License for more details.
  25
  26     You should have received a copy of the GNU General Public License
  27     along with Atmel wireless lan drivers; if not, write to the Free Software
  28     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  29
  30 ******************************************************************************/
  31
  32 #ifdef __IN_PCMCIA_PACKAGE__
  33 #include <pcmcia/k_compat.h>
  34 #endif
  35 #include <linux/init.h>
  36 #include <linux/kernel.h>
  37 #include <linux/module.h>
  38 #include <linux/ptrace.h>
  39 #include <linux/slab.h>
  40 #include <linux/string.h>
  41 #include <linux/netdevice.h>
  42 #include <linux/moduleparam.h>
  43 #include <linux/device.h>
  44
  45 #include <pcmcia/cs.h>
  46 #include <pcmcia/cistpl.h>
  47 #include <pcmcia/cisreg.h>
  48 #include <pcmcia/ds.h>
  49 #include <pcmcia/ciscode.h>
  50
  51 #include <asm/io.h>
  52 #include <asm/system.h>
  53 #include <linux/wireless.h>
  54
  55 #include "atmel.h"
  56
  57
  58 /*====================================================================*/
  59
  60 MODULE_AUTHOR("Simon Kelley");
  61 MODULE_DESCRIPTION("Support for Atmel at76c50x 802.11 wireless ethernet cards.");
  62 MODULE_LICENSE("GPL");
  63 MODULE_SUPPORTED_DEVICE("Atmel at76c50x PCMCIA cards");
  64
  65 /*====================================================================*/
  66
  67 /*
  68    The event() function is this driver's Card Services event handler.
  69    It will be called by Card Services when an appropriate card status
  70    event is received.  The config() and release() entry points are
  71    used to configure or release a socket, in response to card
  72    insertion and ejection events.  They are invoked from the atmel_cs
  73    event handler.
  74 */
  75
  76 static int atmel_config(struct pcmcia_device *link);
  77 static void atmel_release(struct pcmcia_device *link);
  78
  79 /*
  80    The attach() and detach() entry points are used to create and destroy
  81    "instances" of the driver, where each instance represents everything
  82    needed to manage one actual PCMCIA card.
  83 */
  84
  85 static void atmel_detach(struct pcmcia_device *p_dev);
  86
  87 typedef struct local_info_t {
  88         struct net_device *eth_dev;
  89 } local_info_t;
  90
  91 /*======================================================================
  92
  93   atmel_attach() creates an "instance" of the driver, allocating
  94   local data structures for one device.  The device is registered
  95   with Card Services.
  96
  97   The dev_link structure is initialized, but we don't actually
  98   configure the card at this point -- we wait until we receive a
  99   card insertion event.
 100
 101   ======================================================================*/
 102
 103 static int atmel_probe(struct pcmcia_device *p_dev)
 104 {
 105         local_info_t *local;
 106
 107         dev_dbg(&p_dev->dev, "atmel_attach()\n");
 108
 109         /*
 110           General socket configuration defaults can go here.  In this
 111           client, we assume very little, and rely on the CIS for almost
 112           everything.  In most clients, many details (i.e., number, sizes,
 113           and attributes of IO windows) are fixed by the nature of the
 114           device, and can be hard-wired here.
 115         */
 116         p_dev->conf.Attributes = 0;
 117         p_dev->conf.IntType = INT_MEMORY_AND_IO;
 118
 119         /* Allocate space for private device-specific data */
 120         local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 121         if (!local) {
 122                 printk(KERN_ERR "atmel_cs: no memory for new device\n");
 123                 return -ENOMEM;
 124         }
 125         p_dev->priv = local;
 126
 127         return atmel_config(p_dev);
 128 } /* atmel_attach */
 129
 130 /*======================================================================
 131
 132   This deletes a driver "instance".  The device is de-registered
 133   with Card Services.  If it has been released, all local data
 134   structures are freed.  Otherwise, the structures will be freed
 135   when the device is released.
 136
 137   ======================================================================*/
 138
 139 static void atmel_detach(struct pcmcia_device *link)
 140 {
 141         dev_dbg(&link->dev, "atmel_detach\n");
 142
 143         atmel_release(link);
 144
 145         kfree(link->priv);
 146 }
 147
 148 /*======================================================================
 149
 150   atmel_config() is scheduled to run after a CARD_INSERTION event
 151   is received, to configure the PCMCIA socket, and to make the
 152   device available to the system.
 153
 154   ======================================================================*/
 155
 156 /* Call-back function to interrogate PCMCIA-specific information
 157    about the current existance of the card */
 158 static int card_present(void *arg)
 159 {
 160         struct pcmcia_device *link = (struct pcmcia_device *)arg;
 161
 162         if (pcmcia_dev_present(link))
 163                 return 1;
 164
 165         return 0;
 166 }
 167
 168 static int atmel_config_check(struct pcmcia_device *p_dev,
 169                               cistpl_cftable_entry_t *cfg,
 170                               cistpl_cftable_entry_t *dflt,
 171                               unsigned int vcc,
 172                               void *priv_data)
 173 {
 174         if (cfg->index == 0)
 175                 return -ENODEV;
 176
 177         /* Does this card need audio output? */
 178         if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
 179                 p_dev->conf.Attributes |= CONF_ENABLE_SPKR;
 180                 p_dev->conf.Status = CCSR_AUDIO_ENA;
 181         }
 182
 183         /* Use power settings for Vcc and Vpp if present */
 184         /*  Note that the CIS values need to be rescaled */
 185         if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
 186                 p_dev->conf.Vpp = cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
 187         else if (dflt->vpp1.present & (1<<CISTPL_POWER_VNOM))
 188                 p_dev->conf.Vpp = dflt->vpp1.param[CISTPL_POWER_VNOM]/10000;
 189
 190         p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
 191
 192         /* IO window settings */
 193         p_dev->resource[0]->end = p_dev->resource[1]->end = 0;
 194         if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
 195                 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
 196                 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
 197                 p_dev->resource[0]->flags |=
 198                                         pcmcia_io_cfg_data_width(io->flags);
 199                 p_dev->resource[0]->start = io->win[0].base;
 200                 p_dev->resource[0]->end = io->win[0].len;
 201                 if (io->nwin > 1) {
 202                         p_dev->resource[1]->flags = p_dev->resource[0]->flags;
 203                         p_dev->resource[1]->start = io->win[1].base;
 204                         p_dev->resource[1]->end = io->win[1].len;
 205                 }
 206         }
 207
 208         /* This reserves IO space but doesn't actually enable it */
 209         return pcmcia_request_io(p_dev);
 210 }
 211
 212 static int atmel_config(struct pcmcia_device *link)
 213 {
 214         local_info_t *dev;
 215         int ret;
 216         struct pcmcia_device_id *did;
 217
 218         dev = link->priv;
 219         did = dev_get_drvdata(&link->dev);
 220
 221         dev_dbg(&link->dev, "atmel_config\n");
 222
 223         /*
 224           In this loop, we scan the CIS for configuration table entries,
 225           each of which describes a valid card configuration, including
 226           voltage, IO window, memory window, and interrupt settings.
 227
 228           We make no assumptions about the card to be configured: we use
 229           just the information available in the CIS.  In an ideal world,
 230           this would work for any PCMCIA card, but it requires a complete
 231           and accurate CIS.  In practice, a driver usually "knows" most of
 232           these things without consulting the CIS, and most client drivers
 233           will only use the CIS to fill in implementation-defined details.
 234         */
 235         if (pcmcia_loop_config(link, atmel_config_check, NULL))
 236                 goto failed;
 237
 238         if (!link->irq) {
 239                 dev_err(&link->dev, "atmel: cannot assign IRQ: check that CONFIG_ISA is set in kernel config.");
 240                 goto failed;
 241         }
 242
 243         /*
 244           This actually configures the PCMCIA socket -- setting up
 245           the I/O windows and the interrupt mapping, and putting the
 246           card and host interface into "Memory and IO" mode.
 247         */
 248         ret = pcmcia_request_configuration(link, &link->conf);
 249         if (ret)
 250                 goto failed;
 251
 252         ((local_info_t*)link->priv)->eth_dev =
 253                 init_atmel_card(link->irq,
 254                                 link->resource[0]->start,
 255                                 did ? did->driver_info : ATMEL_FW_TYPE_NONE,
 256                                 &link->dev,
 257                                 card_present,
 258                                 link);
 259         if (!((local_info_t*)link->priv)->eth_dev)
 260                         goto failed;
 261
 262
 263         return 0;
 264
 265  failed:
 266         atmel_release(link);
 267         return -ENODEV;
 268 }
 269
 270 /*======================================================================
 271
 272   After a card is removed, atmel_release() will unregister the
 273   device, and release the PCMCIA configuration.  If the device is
 274   still open, this will be postponed until it is closed.
 275
 276   ======================================================================*/
 277
 278 static void atmel_release(struct pcmcia_device *link)
 279 {
 280         struct net_device *dev = ((local_info_t*)link->priv)->eth_dev;
 281
 282         dev_dbg(&link->dev, "atmel_release\n");
 283
 284         if (dev)
 285                 stop_atmel_card(dev);
 286         ((local_info_t*)link->priv)->eth_dev = NULL;
 287
 288         pcmcia_disable_device(link);
 289 }
 290
 291 static int atmel_suspend(struct pcmcia_device *link)
 292 {
 293         local_info_t *local = link->priv;
 294
 295         netif_device_detach(local->eth_dev);
 296
 297         return 0;
 298 }
 299
 300 static int atmel_resume(struct pcmcia_device *link)
 301 {
 302         local_info_t *local = link->priv;
 303
 304         atmel_open(local->eth_dev);
 305         netif_device_attach(local->eth_dev);
 306
 307         return 0;
 308 }
 309
 310 /*====================================================================*/
 311 /* We use the driver_info field to store the correct firmware type for a card. */
 312
 313 #define PCMCIA_DEVICE_MANF_CARD_INFO(manf, card, info) { \
 314         .match_flags = PCMCIA_DEV_ID_MATCH_MANF_ID| \
 315                         PCMCIA_DEV_ID_MATCH_CARD_ID, \
 316         .manf_id = (manf), \
 317         .card_id = (card), \
 318         .driver_info = (kernel_ulong_t)(info), }
 319
 320 #define PCMCIA_DEVICE_PROD_ID12_INFO(v1, v2, vh1, vh2, info) { \
 321         .match_flags = PCMCIA_DEV_ID_MATCH_PROD_ID1| \
 322                         PCMCIA_DEV_ID_MATCH_PROD_ID2, \
 323         .prod_id = { (v1), (v2), NULL, NULL }, \
 324         .prod_id_hash = { (vh1), (vh2), 0, 0 }, \
 325         .driver_info = (kernel_ulong_t)(info), }
 326
 327 static struct pcmcia_device_id atmel_ids[] = {
 328         PCMCIA_DEVICE_MANF_CARD_INFO(0x0101, 0x0620, ATMEL_FW_TYPE_502_3COM),
 329         PCMCIA_DEVICE_MANF_CARD_INFO(0x0101, 0x0696, ATMEL_FW_TYPE_502_3COM),
 330         PCMCIA_DEVICE_MANF_CARD_INFO(0x01bf, 0x3302, ATMEL_FW_TYPE_502E),
 331         PCMCIA_DEVICE_MANF_CARD_INFO(0xd601, 0x0007, ATMEL_FW_TYPE_502),
 332         PCMCIA_DEVICE_PROD_ID12_INFO("11WAVE", "11WP611AL-E", 0x9eb2da1f, 0xc9a0d3f9, ATMEL_FW_TYPE_502E),
 333         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR", 0xabda4164, 0x41b37e1f, ATMEL_FW_TYPE_502),
 334         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR_D", 0xabda4164, 0x3675d704, ATMEL_FW_TYPE_502D),
 335         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR_E", 0xabda4164, 0x4172e792, ATMEL_FW_TYPE_502E),
 336         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504_R", 0xabda4164, 0x917f3d72, ATMEL_FW_TYPE_504_2958),
 337         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504", 0xabda4164, 0x5040670a, ATMEL_FW_TYPE_504),
 338         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504A", 0xabda4164, 0xe15ed87f, ATMEL_FW_TYPE_504A_2958),
 339         PCMCIA_DEVICE_PROD_ID12_INFO("BT", "Voyager 1020 Laptop Adapter", 0xae49b86a, 0x1e957cd5, ATMEL_FW_TYPE_502),
 340         PCMCIA_DEVICE_PROD_ID12_INFO("CNet", "CNWLC 11Mbps Wireless PC Card V-5", 0xbc477dde, 0x502fae6b, ATMEL_FW_TYPE_502E),
 341         PCMCIA_DEVICE_PROD_ID12_INFO("IEEE 802.11b", "Wireless LAN PC Card", 0x5b878724, 0x122f1df6, ATMEL_FW_TYPE_502),
 342         PCMCIA_DEVICE_PROD_ID12_INFO("IEEE 802.11b", "Wireless LAN Card S", 0x5b878724, 0x5fba533a, ATMEL_FW_TYPE_504_2958),
 343         PCMCIA_DEVICE_PROD_ID12_INFO("OEM", "11Mbps Wireless LAN PC Card V-3", 0xfea54c90, 0x1c5b0f68, ATMEL_FW_TYPE_502),
 344         PCMCIA_DEVICE_PROD_ID12_INFO("SMC", "2632W", 0xc4f8b18b, 0x30f38774, ATMEL_FW_TYPE_502D),
 345         PCMCIA_DEVICE_PROD_ID12_INFO("SMC", "2632W-V2", 0xc4f8b18b, 0x172d1377, ATMEL_FW_TYPE_502),
 346         PCMCIA_DEVICE_PROD_ID12_INFO("Wireless", "PC_CARD", 0xa407ecdd, 0x119f6314, ATMEL_FW_TYPE_502D),
 347         PCMCIA_DEVICE_PROD_ID12_INFO("WLAN", "802.11b PC CARD", 0x575c516c, 0xb1f6dbc4, ATMEL_FW_TYPE_502D),
 348         PCMCIA_DEVICE_PROD_ID12_INFO("LG", "LW2100N", 0xb474d43a, 0x6b1fec94, ATMEL_FW_TYPE_502E),
 349         PCMCIA_DEVICE_NULL
 350 };
 351
 352 MODULE_DEVICE_TABLE(pcmcia, atmel_ids);
 353
 354 static struct pcmcia_driver atmel_driver = {
 355         .owner          = THIS_MODULE,
 356         .drv            = {
 357                 .name   = "atmel_cs",
 358         },
 359         .probe          = atmel_probe,
 360         .remove         = atmel_detach,
 361         .id_table       = atmel_ids,
 362         .suspend        = atmel_suspend,
 363         .resume         = atmel_resume,
 364 };
 365
 366 static int atmel_cs_init(void)
 367 {
 368         return pcmcia_register_driver(&atmel_driver);
 369 }
 370
 371 static void atmel_cs_cleanup(void)
 372 {
 373         pcmcia_unregister_driver(&atmel_driver);
 374 }
 375
 376 /*
 377     This program is free software; you can redistribute it and/or
 378     modify it under the terms of the GNU General Public License
 379     as published by the Free Software Foundation; either version 2
 380     of the License, or (at your option) any later version.
 381
 382     This program is distributed in the hope that it will be useful,
 383     but WITHOUT ANY WARRANTY; without even the implied warranty of
 384     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 385     GNU General Public License for more details.
 386
 387     In addition:
 388
 389     Redistribution and use in source and binary forms, with or without
 390     modification, are permitted provided that the following conditions
 391     are met:
 392
 393     1. Redistributions of source code must retain the above copyright
 394        notice, this list of conditions and the following disclaimer.
 395     2. Redistributions in binary form must reproduce the above copyright
 396        notice, this list of conditions and the following disclaimer in the
 397        documentation and/or other materials provided with the distribution.
 398     3. The name of the author may not be used to endorse or promote
 399        products derived from this software without specific prior written
 400        permission.
 401
 402     THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 403     IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 404     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 405     ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 406     INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 407     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 408     SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 409     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 410     STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 411     IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 412     POSSIBILITY OF SUCH DAMAGE.
 413 */
 414
 415 module_init(atmel_cs_init);
 416 module_exit(atmel_cs_cleanup);