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/cistpl.h>
  46 #include <pcmcia/cisreg.h>
  47 #include <pcmcia/ds.h>
  48 #include <pcmcia/ciscode.h>
  49
  50 #include <asm/io.h>
  51 #include <asm/system.h>
  52 #include <linux/wireless.h>
  53
  54 #include "atmel.h"
  55
  56
  57 /*====================================================================*/
  58
  59 MODULE_AUTHOR("Simon Kelley");
  60 MODULE_DESCRIPTION("Support for Atmel at76c50x 802.11 wireless ethernet cards.");
  61 MODULE_LICENSE("GPL");
  62 MODULE_SUPPORTED_DEVICE("Atmel at76c50x PCMCIA cards");
  63
  64 /*====================================================================*/
  65
  66 /*
  67    The event() function is this driver's Card Services event handler.
  68    It will be called by Card Services when an appropriate card status
  69    event is received.  The config() and release() entry points are
  70    used to configure or release a socket, in response to card
  71    insertion and ejection events.  They are invoked from the atmel_cs
  72    event handler.
  73 */
  74
  75 static int atmel_config(struct pcmcia_device *link);
  76 static void atmel_release(struct pcmcia_device *link);
  77
  78 /*
  79    The attach() and detach() entry points are used to create and destroy
  80    "instances" of the driver, where each instance represents everything
  81    needed to manage one actual PCMCIA card.
  82 */
  83
  84 static void atmel_detach(struct pcmcia_device *p_dev);
  85
  86 typedef struct local_info_t {
  87         struct net_device *eth_dev;
  88 } local_info_t;
  89
  90 /*======================================================================
  91
  92   atmel_attach() creates an "instance" of the driver, allocating
  93   local data structures for one device.  The device is registered
  94   with Card Services.
  95
  96   The dev_link structure is initialized, but we don't actually
  97   configure the card at this point -- we wait until we receive a
  98   card insertion event.
  99
 100   ======================================================================*/
 101
 102 static int atmel_probe(struct pcmcia_device *p_dev)
 103 {
 104         local_info_t *local;
 105
 106         dev_dbg(&p_dev->dev, "atmel_attach()\n");
 107
 108         /* Allocate space for private device-specific data */
 109         local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 110         if (!local) {
 111                 printk(KERN_ERR "atmel_cs: no memory for new device\n");
 112                 return -ENOMEM;
 113         }
 114         p_dev->priv = local;
 115
 116         return atmel_config(p_dev);
 117 } /* atmel_attach */
 118
 119 /*======================================================================
 120
 121   This deletes a driver "instance".  The device is de-registered
 122   with Card Services.  If it has been released, all local data
 123   structures are freed.  Otherwise, the structures will be freed
 124   when the device is released.
 125
 126   ======================================================================*/
 127
 128 static void atmel_detach(struct pcmcia_device *link)
 129 {
 130         dev_dbg(&link->dev, "atmel_detach\n");
 131
 132         atmel_release(link);
 133
 134         kfree(link->priv);
 135 }
 136
 137 /*======================================================================
 138
 139   atmel_config() is scheduled to run after a CARD_INSERTION event
 140   is received, to configure the PCMCIA socket, and to make the
 141   device available to the system.
 142
 143   ======================================================================*/
 144
 145 /* Call-back function to interrogate PCMCIA-specific information
 146    about the current existance of the card */
 147 static int card_present(void *arg)
 148 {
 149         struct pcmcia_device *link = (struct pcmcia_device *)arg;
 150
 151         if (pcmcia_dev_present(link))
 152                 return 1;
 153
 154         return 0;
 155 }
 156
 157 static int atmel_config_check(struct pcmcia_device *p_dev, void *priv_data)
 158 {
 159         if (p_dev->config_index == 0)
 160                 return -EINVAL;
 161
 162         return pcmcia_request_io(p_dev);
 163 }
 164
 165 static int atmel_config(struct pcmcia_device *link)
 166 {
 167         local_info_t *dev;
 168         int ret;
 169         struct pcmcia_device_id *did;
 170
 171         dev = link->priv;
 172         did = dev_get_drvdata(&link->dev);
 173
 174         dev_dbg(&link->dev, "atmel_config\n");
 175
 176         link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_VPP |
 177                 CONF_AUTO_AUDIO | CONF_AUTO_SET_IO;
 178
 179         /*
 180           In this loop, we scan the CIS for configuration table entries,
 181           each of which describes a valid card configuration, including
 182           voltage, IO window, memory window, and interrupt settings.
 183
 184           We make no assumptions about the card to be configured: we use
 185           just the information available in the CIS.  In an ideal world,
 186           this would work for any PCMCIA card, but it requires a complete
 187           and accurate CIS.  In practice, a driver usually "knows" most of
 188           these things without consulting the CIS, and most client drivers
 189           will only use the CIS to fill in implementation-defined details.
 190         */
 191         if (pcmcia_loop_config(link, atmel_config_check, NULL))
 192                 goto failed;
 193
 194         if (!link->irq) {
 195                 dev_err(&link->dev, "atmel: cannot assign IRQ: check that CONFIG_ISA is set in kernel config.");
 196                 goto failed;
 197         }
 198
 199         /*
 200           This actually configures the PCMCIA socket -- setting up
 201           the I/O windows and the interrupt mapping, and putting the
 202           card and host interface into "Memory and IO" mode.
 203         */
 204         ret = pcmcia_enable_device(link);
 205         if (ret)
 206                 goto failed;
 207
 208         ((local_info_t*)link->priv)->eth_dev =
 209                 init_atmel_card(link->irq,
 210                                 link->resource[0]->start,
 211                                 did ? did->driver_info : ATMEL_FW_TYPE_NONE,
 212                                 &link->dev,
 213                                 card_present,
 214                                 link);
 215         if (!((local_info_t*)link->priv)->eth_dev)
 216                         goto failed;
 217
 218
 219         return 0;
 220
 221  failed:
 222         atmel_release(link);
 223         return -ENODEV;
 224 }
 225
 226 /*======================================================================
 227
 228   After a card is removed, atmel_release() will unregister the
 229   device, and release the PCMCIA configuration.  If the device is
 230   still open, this will be postponed until it is closed.
 231
 232   ======================================================================*/
 233
 234 static void atmel_release(struct pcmcia_device *link)
 235 {
 236         struct net_device *dev = ((local_info_t*)link->priv)->eth_dev;
 237
 238         dev_dbg(&link->dev, "atmel_release\n");
 239
 240         if (dev)
 241                 stop_atmel_card(dev);
 242         ((local_info_t*)link->priv)->eth_dev = NULL;
 243
 244         pcmcia_disable_device(link);
 245 }
 246
 247 static int atmel_suspend(struct pcmcia_device *link)
 248 {
 249         local_info_t *local = link->priv;
 250
 251         netif_device_detach(local->eth_dev);
 252
 253         return 0;
 254 }
 255
 256 static int atmel_resume(struct pcmcia_device *link)
 257 {
 258         local_info_t *local = link->priv;
 259
 260         atmel_open(local->eth_dev);
 261         netif_device_attach(local->eth_dev);
 262
 263         return 0;
 264 }
 265
 266 /*====================================================================*/
 267 /* We use the driver_info field to store the correct firmware type for a card. */
 268
 269 #define PCMCIA_DEVICE_MANF_CARD_INFO(manf, card, info) { \
 270         .match_flags = PCMCIA_DEV_ID_MATCH_MANF_ID| \
 271                         PCMCIA_DEV_ID_MATCH_CARD_ID, \
 272         .manf_id = (manf), \
 273         .card_id = (card), \
 274         .driver_info = (kernel_ulong_t)(info), }
 275
 276 #define PCMCIA_DEVICE_PROD_ID12_INFO(v1, v2, vh1, vh2, info) { \
 277         .match_flags = PCMCIA_DEV_ID_MATCH_PROD_ID1| \
 278                         PCMCIA_DEV_ID_MATCH_PROD_ID2, \
 279         .prod_id = { (v1), (v2), NULL, NULL }, \
 280         .prod_id_hash = { (vh1), (vh2), 0, 0 }, \
 281         .driver_info = (kernel_ulong_t)(info), }
 282
 283 static struct pcmcia_device_id atmel_ids[] = {
 284         PCMCIA_DEVICE_MANF_CARD_INFO(0x0101, 0x0620, ATMEL_FW_TYPE_502_3COM),
 285         PCMCIA_DEVICE_MANF_CARD_INFO(0x0101, 0x0696, ATMEL_FW_TYPE_502_3COM),
 286         PCMCIA_DEVICE_MANF_CARD_INFO(0x01bf, 0x3302, ATMEL_FW_TYPE_502E),
 287         PCMCIA_DEVICE_MANF_CARD_INFO(0xd601, 0x0007, ATMEL_FW_TYPE_502),
 288         PCMCIA_DEVICE_PROD_ID12_INFO("11WAVE", "11WP611AL-E", 0x9eb2da1f, 0xc9a0d3f9, ATMEL_FW_TYPE_502E),
 289         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR", 0xabda4164, 0x41b37e1f, ATMEL_FW_TYPE_502),
 290         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR_D", 0xabda4164, 0x3675d704, ATMEL_FW_TYPE_502D),
 291         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR_E", 0xabda4164, 0x4172e792, ATMEL_FW_TYPE_502E),
 292         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504_R", 0xabda4164, 0x917f3d72, ATMEL_FW_TYPE_504_2958),
 293         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504", 0xabda4164, 0x5040670a, ATMEL_FW_TYPE_504),
 294         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504A", 0xabda4164, 0xe15ed87f, ATMEL_FW_TYPE_504A_2958),
 295         PCMCIA_DEVICE_PROD_ID12_INFO("BT", "Voyager 1020 Laptop Adapter", 0xae49b86a, 0x1e957cd5, ATMEL_FW_TYPE_502),
 296         PCMCIA_DEVICE_PROD_ID12_INFO("CNet", "CNWLC 11Mbps Wireless PC Card V-5", 0xbc477dde, 0x502fae6b, ATMEL_FW_TYPE_502E),
 297         PCMCIA_DEVICE_PROD_ID12_INFO("IEEE 802.11b", "Wireless LAN PC Card", 0x5b878724, 0x122f1df6, ATMEL_FW_TYPE_502),
 298         PCMCIA_DEVICE_PROD_ID12_INFO("IEEE 802.11b", "Wireless LAN Card S", 0x5b878724, 0x5fba533a, ATMEL_FW_TYPE_504_2958),
 299         PCMCIA_DEVICE_PROD_ID12_INFO("OEM", "11Mbps Wireless LAN PC Card V-3", 0xfea54c90, 0x1c5b0f68, ATMEL_FW_TYPE_502),
 300         PCMCIA_DEVICE_PROD_ID12_INFO("SMC", "2632W", 0xc4f8b18b, 0x30f38774, ATMEL_FW_TYPE_502D),
 301         PCMCIA_DEVICE_PROD_ID12_INFO("SMC", "2632W-V2", 0xc4f8b18b, 0x172d1377, ATMEL_FW_TYPE_502),
 302         PCMCIA_DEVICE_PROD_ID12_INFO("Wireless", "PC_CARD", 0xa407ecdd, 0x119f6314, ATMEL_FW_TYPE_502D),
 303         PCMCIA_DEVICE_PROD_ID12_INFO("WLAN", "802.11b PC CARD", 0x575c516c, 0xb1f6dbc4, ATMEL_FW_TYPE_502D),
 304         PCMCIA_DEVICE_PROD_ID12_INFO("LG", "LW2100N", 0xb474d43a, 0x6b1fec94, ATMEL_FW_TYPE_502E),
 305         PCMCIA_DEVICE_NULL
 306 };
 307
 308 MODULE_DEVICE_TABLE(pcmcia, atmel_ids);
 309
 310 static struct pcmcia_driver atmel_driver = {
 311         .owner          = THIS_MODULE,
 312         .name           = "atmel_cs",
 313         .probe          = atmel_probe,
 314         .remove         = atmel_detach,
 315         .id_table       = atmel_ids,
 316         .suspend        = atmel_suspend,
 317         .resume         = atmel_resume,
 318 };
 319
 320 static int atmel_cs_init(void)
 321 {
 322         return pcmcia_register_driver(&atmel_driver);
 323 }
 324
 325 static void atmel_cs_cleanup(void)
 326 {
 327         pcmcia_unregister_driver(&atmel_driver);
 328 }
 329
 330 /*
 331     This program is free software; you can redistribute it and/or
 332     modify it under the terms of the GNU General Public License
 333     as published by the Free Software Foundation; either version 2
 334     of the License, or (at your option) any later version.
 335
 336     This program is distributed in the hope that it will be useful,
 337     but WITHOUT ANY WARRANTY; without even the implied warranty of
 338     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 339     GNU General Public License for more details.
 340
 341     In addition:
 342
 343     Redistribution and use in source and binary forms, with or without
 344     modification, are permitted provided that the following conditions
 345     are met:
 346
 347     1. Redistributions of source code must retain the above copyright
 348        notice, this list of conditions and the following disclaimer.
 349     2. Redistributions in binary form must reproduce the above copyright
 350        notice, this list of conditions and the following disclaimer in the
 351        documentation and/or other materials provided with the distribution.
 352     3. The name of the author may not be used to endorse or promote
 353        products derived from this software without specific prior written
 354        permission.
 355
 356     THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 357     IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 358     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 359     ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 360     INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 361     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 362     SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 363     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 364     STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 365     IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 366     POSSIBILITY OF SUCH DAMAGE.
 367 */
 368
 369 module_init(atmel_cs_init);
 370 module_exit(atmel_cs_cleanup);