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 #include <linux/config.h>
  33 #ifdef __IN_PCMCIA_PACKAGE__
  34 #include <pcmcia/k_compat.h>
  35 #endif
  36 #include <linux/init.h>
  37 #include <linux/kernel.h>
  38 #include <linux/module.h>
  39 #include <linux/ptrace.h>
  40 #include <linux/slab.h>
  41 #include <linux/string.h>
  42 #include <linux/netdevice.h>
  43 #include <linux/moduleparam.h>
  44 #include <linux/device.h>
  45
  46 #include <pcmcia/cs_types.h>
  47 #include <pcmcia/cs.h>
  48 #include <pcmcia/cistpl.h>
  49 #include <pcmcia/cisreg.h>
  50 #include <pcmcia/ds.h>
  51 #include <pcmcia/ciscode.h>
  52
  53 #include <asm/io.h>
  54 #include <asm/system.h>
  55 #include <linux/wireless.h>
  56
  57 #include "atmel.h"
  58
  59 /*
  60    All the PCMCIA modules use PCMCIA_DEBUG to control debugging.  If
  61    you do not define PCMCIA_DEBUG at all, all the debug code will be
  62    left out.  If you compile with PCMCIA_DEBUG=0, the debug code will
  63    be present but disabled -- but it can then be enabled for specific
  64    modules at load time with a 'pc_debug=#' option to insmod.
  65 */
  66
  67 #ifdef PCMCIA_DEBUG
  68 static int pc_debug = PCMCIA_DEBUG;
  69 module_param(pc_debug, int, 0);
  70 static char *version = "$Revision: 1.2 $";
  71 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
  72 #else
  73 #define DEBUG(n, args...)
  74 #endif
  75
  76 /*====================================================================*/
  77
  78 MODULE_AUTHOR("Simon Kelley");
  79 MODULE_DESCRIPTION("Support for Atmel at76c50x 802.11 wireless ethernet cards.");
  80 MODULE_LICENSE("GPL");
  81 MODULE_SUPPORTED_DEVICE("Atmel at76c50x PCMCIA cards");
  82
  83 /*====================================================================*/
  84
  85 /*
  86    The event() function is this driver's Card Services event handler.
  87    It will be called by Card Services when an appropriate card status
  88    event is received.  The config() and release() entry points are
  89    used to configure or release a socket, in response to card
  90    insertion and ejection events.  They are invoked from the atmel_cs
  91    event handler.
  92 */
  93
  94 static int atmel_config(struct pcmcia_device *link);
  95 static void atmel_release(struct pcmcia_device *link);
  96
  97 /*
  98    The attach() and detach() entry points are used to create and destroy
  99    "instances" of the driver, where each instance represents everything
 100    needed to manage one actual PCMCIA card.
 101 */
 102
 103 static void atmel_detach(struct pcmcia_device *p_dev);
 104
 105 /*
 106    You'll also need to prototype all the functions that will actually
 107    be used to talk to your device.  See 'pcmem_cs' for a good example
 108    of a fully self-sufficient driver; the other drivers rely more or
 109    less on other parts of the kernel.
 110 */
 111
 112 /*
 113    A linked list of "instances" of the  atmelnet device.  Each actual
 114    PCMCIA card corresponds to one device instance, and is described
 115    by one struct pcmcia_device structure (defined in ds.h).
 116
 117    You may not want to use a linked list for this -- for example, the
 118    memory card driver uses an array of struct pcmcia_device pointers, where minor
 119    device numbers are used to derive the corresponding array index.
 120 */
 121
 122 /*
 123    A driver needs to provide a dev_node_t structure for each device
 124    on a card.  In some cases, there is only one device per card (for
 125    example, ethernet cards, modems).  In other cases, there may be
 126    many actual or logical devices (SCSI adapters, memory cards with
 127    multiple partitions).  The dev_node_t structures need to be kept
 128    in a linked list starting at the 'dev' field of a struct pcmcia_device
 129    structure.  We allocate them in the card's private data structure,
 130    because they generally shouldn't be allocated dynamically.
 131
 132    In this case, we also provide a flag to indicate if a device is
 133    "stopped" due to a power management event, or card ejection.  The
 134    device IO routines can use a flag like this to throttle IO to a
 135    card that is not ready to accept it.
 136 */
 137
 138 typedef struct local_info_t {
 139         dev_node_t      node;
 140         struct net_device *eth_dev;
 141 } local_info_t;
 142
 143 /*======================================================================
 144
 145   atmel_attach() creates an "instance" of the driver, allocating
 146   local data structures for one device.  The device is registered
 147   with Card Services.
 148
 149   The dev_link structure is initialized, but we don't actually
 150   configure the card at this point -- we wait until we receive a
 151   card insertion event.
 152
 153   ======================================================================*/
 154
 155 static int atmel_probe(struct pcmcia_device *p_dev)
 156 {
 157         local_info_t *local;
 158
 159         DEBUG(0, "atmel_attach()\n");
 160
 161         /* Interrupt setup */
 162         p_dev->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 163         p_dev->irq.IRQInfo1 = IRQ_LEVEL_ID;
 164         p_dev->irq.Handler = NULL;
 165
 166         /*
 167           General socket configuration defaults can go here.  In this
 168           client, we assume very little, and rely on the CIS for almost
 169           everything.  In most clients, many details (i.e., number, sizes,
 170           and attributes of IO windows) are fixed by the nature of the
 171           device, and can be hard-wired here.
 172         */
 173         p_dev->conf.Attributes = 0;
 174         p_dev->conf.IntType = INT_MEMORY_AND_IO;
 175
 176         /* Allocate space for private device-specific data */
 177         local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 178         if (!local) {
 179                 printk(KERN_ERR "atmel_cs: no memory for new device\n");
 180                 return -ENOMEM;
 181         }
 182         p_dev->priv = local;
 183
 184         return atmel_config(p_dev);
 185 } /* atmel_attach */
 186
 187 /*======================================================================
 188
 189   This deletes a driver "instance".  The device is de-registered
 190   with Card Services.  If it has been released, all local data
 191   structures are freed.  Otherwise, the structures will be freed
 192   when the device is released.
 193
 194   ======================================================================*/
 195
 196 static void atmel_detach(struct pcmcia_device *link)
 197 {
 198         DEBUG(0, "atmel_detach(0x%p)\n", link);
 199
 200         atmel_release(link);
 201
 202         kfree(link->priv);
 203 }
 204
 205 /*======================================================================
 206
 207   atmel_config() is scheduled to run after a CARD_INSERTION event
 208   is received, to configure the PCMCIA socket, and to make the
 209   device available to the system.
 210
 211   ======================================================================*/
 212
 213 #define CS_CHECK(fn, ret) \
 214 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
 215
 216 /* Call-back function to interrogate PCMCIA-specific information
 217    about the current existance of the card */
 218 static int card_present(void *arg)
 219 {
 220         struct pcmcia_device *link = (struct pcmcia_device *)arg;
 221         if (link->suspended)
 222                 return 0;
 223         else if (pcmcia_dev_present(link))
 224                 return 1;
 225
 226         return 0;
 227 }
 228
 229 static int atmel_config(struct pcmcia_device *link)
 230 {
 231         tuple_t tuple;
 232         cisparse_t parse;
 233         local_info_t *dev;
 234         int last_fn, last_ret;
 235         u_char buf[64];
 236         struct pcmcia_device_id *did;
 237
 238         dev = link->priv;
 239         did = handle_to_dev(link).driver_data;
 240
 241         DEBUG(0, "atmel_config(0x%p)\n", link);
 242
 243         tuple.Attributes = 0;
 244         tuple.TupleData = buf;
 245         tuple.TupleDataMax = sizeof(buf);
 246         tuple.TupleOffset = 0;
 247
 248         /*
 249           This reads the card's CONFIG tuple to find its configuration
 250           registers.
 251         */
 252         tuple.DesiredTuple = CISTPL_CONFIG;
 253         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
 254         CS_CHECK(GetTupleData, pcmcia_get_tuple_data(link, &tuple));
 255         CS_CHECK(ParseTuple, pcmcia_parse_tuple(link, &tuple, &parse));
 256         link->conf.ConfigBase = parse.config.base;
 257         link->conf.Present = parse.config.rmask[0];
 258
 259         /*
 260           In this loop, we scan the CIS for configuration table entries,
 261           each of which describes a valid card configuration, including
 262           voltage, IO window, memory window, and interrupt settings.
 263
 264           We make no assumptions about the card to be configured: we use
 265           just the information available in the CIS.  In an ideal world,
 266           this would work for any PCMCIA card, but it requires a complete
 267           and accurate CIS.  In practice, a driver usually "knows" most of
 268           these things without consulting the CIS, and most client drivers
 269           will only use the CIS to fill in implementation-defined details.
 270         */
 271         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 272         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
 273         while (1) {
 274                 cistpl_cftable_entry_t dflt = { 0 };
 275                 cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
 276                 if (pcmcia_get_tuple_data(link, &tuple) != 0 ||
 277                                 pcmcia_parse_tuple(link, &tuple, &parse) != 0)
 278                         goto next_entry;
 279
 280                 if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
 281                 if (cfg->index == 0) goto next_entry;
 282                 link->conf.ConfigIndex = cfg->index;
 283
 284                 /* Does this card need audio output? */
 285                 if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
 286                         link->conf.Attributes |= CONF_ENABLE_SPKR;
 287                         link->conf.Status = CCSR_AUDIO_ENA;
 288                 }
 289
 290                 /* Use power settings for Vcc and Vpp if present */
 291                 /*  Note that the CIS values need to be rescaled */
 292                 if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
 293                         link->conf.Vpp =
 294                                 cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
 295                 else if (dflt.vpp1.present & (1<<CISTPL_POWER_VNOM))
 296                         link->conf.Vpp =
 297                                 dflt.vpp1.param[CISTPL_POWER_VNOM]/10000;
 298
 299                 /* Do we need to allocate an interrupt? */
 300                 if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1)
 301                         link->conf.Attributes |= CONF_ENABLE_IRQ;
 302
 303                 /* IO window settings */
 304                 link->io.NumPorts1 = link->io.NumPorts2 = 0;
 305                 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
 306                         cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
 307                         link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
 308                         if (!(io->flags & CISTPL_IO_8BIT))
 309                                 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
 310                         if (!(io->flags & CISTPL_IO_16BIT))
 311                                 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 312                         link->io.BasePort1 = io->win[0].base;
 313                         link->io.NumPorts1 = io->win[0].len;
 314                         if (io->nwin > 1) {
 315                                 link->io.Attributes2 = link->io.Attributes1;
 316                                 link->io.BasePort2 = io->win[1].base;
 317                                 link->io.NumPorts2 = io->win[1].len;
 318                         }
 319                 }
 320
 321                 /* This reserves IO space but doesn't actually enable it */
 322                 if (pcmcia_request_io(link, &link->io) != 0)
 323                         goto next_entry;
 324
 325                 /* If we got this far, we're cool! */
 326                 break;
 327
 328         next_entry:
 329                 CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(link, &tuple));
 330         }
 331
 332         /*
 333           Allocate an interrupt line.  Note that this does not assign a
 334           handler to the interrupt, unless the 'Handler' member of the
 335           irq structure is initialized.
 336         */
 337         if (link->conf.Attributes & CONF_ENABLE_IRQ)
 338                 CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
 339
 340         /*
 341           This actually configures the PCMCIA socket -- setting up
 342           the I/O windows and the interrupt mapping, and putting the
 343           card and host interface into "Memory and IO" mode.
 344         */
 345         CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
 346
 347         if (link->irq.AssignedIRQ == 0) {
 348                 printk(KERN_ALERT
 349                        "atmel: cannot assign IRQ: check that CONFIG_ISA is set in kernel config.");
 350                 goto cs_failed;
 351         }
 352
 353         ((local_info_t*)link->priv)->eth_dev =
 354                 init_atmel_card(link->irq.AssignedIRQ,
 355                                 link->io.BasePort1,
 356                                 did ? did->driver_info : ATMEL_FW_TYPE_NONE,
 357                                 &handle_to_dev(link),
 358                                 card_present,
 359                                 link);
 360         if (!((local_info_t*)link->priv)->eth_dev)
 361                         goto cs_failed;
 362
 363
 364         /*
 365           At this point, the dev_node_t structure(s) need to be
 366           initialized and arranged in a linked list at link->dev_node.
 367         */
 368         strcpy(dev->node.dev_name, ((local_info_t*)link->priv)->eth_dev->name );
 369         dev->node.major = dev->node.minor = 0;
 370         link->dev_node = &dev->node;
 371
 372         return 0;
 373
 374  cs_failed:
 375         cs_error(link, last_fn, last_ret);
 376         atmel_release(link);
 377         return -ENODEV;
 378 }
 379
 380 /*======================================================================
 381
 382   After a card is removed, atmel_release() will unregister the
 383   device, and release the PCMCIA configuration.  If the device is
 384   still open, this will be postponed until it is closed.
 385
 386   ======================================================================*/
 387
 388 static void atmel_release(struct pcmcia_device *link)
 389 {
 390         struct net_device *dev = ((local_info_t*)link->priv)->eth_dev;
 391
 392         DEBUG(0, "atmel_release(0x%p)\n", link);
 393
 394         if (dev)
 395                 stop_atmel_card(dev);
 396         ((local_info_t*)link->priv)->eth_dev = NULL;
 397
 398         pcmcia_disable_device(link);
 399 }
 400
 401 static int atmel_suspend(struct pcmcia_device *link)
 402 {
 403         local_info_t *local = link->priv;
 404
 405         netif_device_detach(local->eth_dev);
 406
 407         return 0;
 408 }
 409
 410 static int atmel_resume(struct pcmcia_device *link)
 411 {
 412         local_info_t *local = link->priv;
 413
 414         atmel_open(local->eth_dev);
 415         netif_device_attach(local->eth_dev);
 416
 417         return 0;
 418 }
 419
 420 /*====================================================================*/
 421 /* We use the driver_info field to store the correct firmware type for a card. */
 422
 423 #define PCMCIA_DEVICE_MANF_CARD_INFO(manf, card, info) { \
 424         .match_flags = PCMCIA_DEV_ID_MATCH_MANF_ID| \
 425                         PCMCIA_DEV_ID_MATCH_CARD_ID, \
 426         .manf_id = (manf), \
 427         .card_id = (card), \
 428         .driver_info = (kernel_ulong_t)(info), }
 429
 430 #define PCMCIA_DEVICE_PROD_ID12_INFO(v1, v2, vh1, vh2, info) { \
 431         .match_flags = PCMCIA_DEV_ID_MATCH_PROD_ID1| \
 432                         PCMCIA_DEV_ID_MATCH_PROD_ID2, \
 433         .prod_id = { (v1), (v2), NULL, NULL }, \
 434         .prod_id_hash = { (vh1), (vh2), 0, 0 }, \
 435         .driver_info = (kernel_ulong_t)(info), }
 436
 437 static struct pcmcia_device_id atmel_ids[] = {
 438         PCMCIA_DEVICE_MANF_CARD_INFO(0x0101, 0x0620, ATMEL_FW_TYPE_502_3COM),
 439         PCMCIA_DEVICE_MANF_CARD_INFO(0x0101, 0x0696, ATMEL_FW_TYPE_502_3COM),
 440         PCMCIA_DEVICE_MANF_CARD_INFO(0x01bf, 0x3302, ATMEL_FW_TYPE_502E),
 441         PCMCIA_DEVICE_MANF_CARD_INFO(0xd601, 0x0007, ATMEL_FW_TYPE_502),
 442         PCMCIA_DEVICE_PROD_ID12_INFO("11WAVE", "11WP611AL-E", 0x9eb2da1f, 0xc9a0d3f9, ATMEL_FW_TYPE_502E),
 443         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR", 0xabda4164, 0x41b37e1f, ATMEL_FW_TYPE_502),
 444         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR_D", 0xabda4164, 0x3675d704, ATMEL_FW_TYPE_502D),
 445         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR_E", 0xabda4164, 0x4172e792, ATMEL_FW_TYPE_502E),
 446         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504_R", 0xabda4164, 0x917f3d72, ATMEL_FW_TYPE_504_2958),
 447         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504", 0xabda4164, 0x5040670a, ATMEL_FW_TYPE_504),
 448         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504A", 0xabda4164, 0xe15ed87f, ATMEL_FW_TYPE_504A_2958),
 449         PCMCIA_DEVICE_PROD_ID12_INFO("BT", "Voyager 1020 Laptop Adapter", 0xae49b86a, 0x1e957cd5, ATMEL_FW_TYPE_502),
 450         PCMCIA_DEVICE_PROD_ID12_INFO("CNet", "CNWLC 11Mbps Wireless PC Card V-5", 0xbc477dde, 0x502fae6b, ATMEL_FW_TYPE_502E),
 451         PCMCIA_DEVICE_PROD_ID12_INFO("IEEE 802.11b", "Wireless LAN PC Card", 0x5b878724, 0x122f1df6, ATMEL_FW_TYPE_502),
 452         PCMCIA_DEVICE_PROD_ID12_INFO("IEEE 802.11b", "Wireless LAN Card S", 0x5b878724, 0x5fba533a, ATMEL_FW_TYPE_504_2958),
 453         PCMCIA_DEVICE_PROD_ID12_INFO("OEM", "11Mbps Wireless LAN PC Card V-3", 0xfea54c90, 0x1c5b0f68, ATMEL_FW_TYPE_502),
 454         PCMCIA_DEVICE_PROD_ID12_INFO("SMC", "2632W", 0xc4f8b18b, 0x30f38774, ATMEL_FW_TYPE_502D),
 455         PCMCIA_DEVICE_PROD_ID12_INFO("SMC", "2632W-V2", 0xc4f8b18b, 0x172d1377, ATMEL_FW_TYPE_502),
 456         PCMCIA_DEVICE_PROD_ID12_INFO("Wireless", "PC_CARD", 0xa407ecdd, 0x119f6314, ATMEL_FW_TYPE_502D),
 457         PCMCIA_DEVICE_PROD_ID12_INFO("WLAN", "802.11b PC CARD", 0x575c516c, 0xb1f6dbc4, ATMEL_FW_TYPE_502D),
 458         PCMCIA_DEVICE_PROD_ID12_INFO("LG", "LW2100N", 0xb474d43a, 0x6b1fec94, ATMEL_FW_TYPE_502E),
 459         PCMCIA_DEVICE_NULL
 460 };
 461
 462 MODULE_DEVICE_TABLE(pcmcia, atmel_ids);
 463
 464 static struct pcmcia_driver atmel_driver = {
 465         .owner          = THIS_MODULE,
 466         .drv            = {
 467                 .name   = "atmel_cs",
 468         },
 469         .probe          = atmel_probe,
 470         .remove         = atmel_detach,
 471         .id_table       = atmel_ids,
 472         .suspend        = atmel_suspend,
 473         .resume         = atmel_resume,
 474 };
 475
 476 static int atmel_cs_init(void)
 477 {
 478         return pcmcia_register_driver(&atmel_driver);
 479 }
 480
 481 static void atmel_cs_cleanup(void)
 482 {
 483         pcmcia_unregister_driver(&atmel_driver);
 484 }
 485
 486 /*
 487     This program is free software; you can redistribute it and/or
 488     modify it under the terms of the GNU General Public License
 489     as published by the Free Software Foundation; either version 2
 490     of the License, or (at your option) any later version.
 491
 492     This program is distributed in the hope that it will be useful,
 493     but WITHOUT ANY WARRANTY; without even the implied warranty of
 494     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 495     GNU General Public License for more details.
 496
 497     In addition:
 498
 499     Redistribution and use in source and binary forms, with or without
 500     modification, are permitted provided that the following conditions
 501     are met:
 502
 503     1. Redistributions of source code must retain the above copyright
 504        notice, this list of conditions and the following disclaimer.
 505     2. Redistributions in binary form must reproduce the above copyright
 506        notice, this list of conditions and the following disclaimer in the
 507        documentation and/or other materials provided with the distribution.
 508     3. The name of the author may not be used to endorse or promote
 509        products derived from this software without specific prior written
 510        permission.
 511
 512     THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 513     IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 514     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 515     ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 516     INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 517     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 518     SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 519     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 520     STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 521     IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 522     POSSIBILITY OF SUCH DAMAGE.
 523 */
 524
 525 module_init(atmel_cs_init);
 526 module_exit(atmel_cs_cleanup);