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 void atmel_config(dev_link_t *link);
  95 static void atmel_release(dev_link_t *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 dev_link_t 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 dev_link_t 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 dev_link_t
 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_attach(struct pcmcia_device *p_dev)
 156 {
 157         dev_link_t *link;
 158         local_info_t *local;
 159
 160         DEBUG(0, "atmel_attach()\n");
 161
 162         /* Initialize the dev_link_t structure */
 163         link = kzalloc(sizeof(struct dev_link_t), GFP_KERNEL);
 164         if (!link) {
 165                 printk(KERN_ERR "atmel_cs: no memory for new device\n");
 166                 return -ENOMEM;
 167         }
 168
 169         /* Interrupt setup */
 170         link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 171         link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 172         link->irq.Handler = NULL;
 173
 174         /*
 175           General socket configuration defaults can go here.  In this
 176           client, we assume very little, and rely on the CIS for almost
 177           everything.  In most clients, many details (i.e., number, sizes,
 178           and attributes of IO windows) are fixed by the nature of the
 179           device, and can be hard-wired here.
 180         */
 181         link->conf.Attributes = 0;
 182         link->conf.Vcc = 50;
 183         link->conf.IntType = INT_MEMORY_AND_IO;
 184
 185         /* Allocate space for private device-specific data */
 186         local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 187         if (!local) {
 188                 printk(KERN_ERR "atmel_cs: no memory for new device\n");
 189                 kfree (link);
 190                 return -ENOMEM;
 191         }
 192         link->priv = local;
 193
 194         link->handle = p_dev;
 195         p_dev->instance = link;
 196
 197         link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
 198         atmel_config(link);
 199
 200         return 0;
 201 } /* atmel_attach */
 202
 203 /*======================================================================
 204
 205   This deletes a driver "instance".  The device is de-registered
 206   with Card Services.  If it has been released, all local data
 207   structures are freed.  Otherwise, the structures will be freed
 208   when the device is released.
 209
 210   ======================================================================*/
 211
 212 static void atmel_detach(struct pcmcia_device *p_dev)
 213 {
 214         dev_link_t *link = dev_to_instance(p_dev);
 215
 216         DEBUG(0, "atmel_detach(0x%p)\n", link);
 217
 218         if (link->state & DEV_CONFIG)
 219                 atmel_release(link);
 220
 221         kfree(link->priv);
 222         kfree(link);
 223 }
 224
 225 /*======================================================================
 226
 227   atmel_config() is scheduled to run after a CARD_INSERTION event
 228   is received, to configure the PCMCIA socket, and to make the
 229   device available to the system.
 230
 231   ======================================================================*/
 232
 233 #define CS_CHECK(fn, ret) \
 234 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
 235
 236 /* Call-back function to interrogate PCMCIA-specific information
 237    about the current existance of the card */
 238 static int card_present(void *arg)
 239 {
 240         dev_link_t *link = (dev_link_t *)arg;
 241         if (link->state & DEV_SUSPEND)
 242                 return 0;
 243         else if (link->state & DEV_PRESENT)
 244                 return 1;
 245
 246         return 0;
 247 }
 248
 249 static void atmel_config(dev_link_t *link)
 250 {
 251         client_handle_t handle;
 252         tuple_t tuple;
 253         cisparse_t parse;
 254         local_info_t *dev;
 255         int last_fn, last_ret;
 256         u_char buf[64];
 257         struct pcmcia_device_id *did;
 258
 259         handle = link->handle;
 260         dev = link->priv;
 261         did = handle_to_dev(handle).driver_data;
 262
 263         DEBUG(0, "atmel_config(0x%p)\n", link);
 264
 265         tuple.Attributes = 0;
 266         tuple.TupleData = buf;
 267         tuple.TupleDataMax = sizeof(buf);
 268         tuple.TupleOffset = 0;
 269
 270         /*
 271           This reads the card's CONFIG tuple to find its configuration
 272           registers.
 273         */
 274         tuple.DesiredTuple = CISTPL_CONFIG;
 275         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 276         CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
 277         CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
 278         link->conf.ConfigBase = parse.config.base;
 279         link->conf.Present = parse.config.rmask[0];
 280
 281         /* Configure card */
 282         link->state |= DEV_CONFIG;
 283
 284         /*
 285           In this loop, we scan the CIS for configuration table entries,
 286           each of which describes a valid card configuration, including
 287           voltage, IO window, memory window, and interrupt settings.
 288
 289           We make no assumptions about the card to be configured: we use
 290           just the information available in the CIS.  In an ideal world,
 291           this would work for any PCMCIA card, but it requires a complete
 292           and accurate CIS.  In practice, a driver usually "knows" most of
 293           these things without consulting the CIS, and most client drivers
 294           will only use the CIS to fill in implementation-defined details.
 295         */
 296         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 297         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 298         while (1) {
 299                 cistpl_cftable_entry_t dflt = { 0 };
 300                 cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
 301                 if (pcmcia_get_tuple_data(handle, &tuple) != 0 ||
 302                                 pcmcia_parse_tuple(handle, &tuple, &parse) != 0)
 303                         goto next_entry;
 304
 305                 if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
 306                 if (cfg->index == 0) goto next_entry;
 307                 link->conf.ConfigIndex = cfg->index;
 308
 309                 /* Does this card need audio output? */
 310                 if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
 311                         link->conf.Attributes |= CONF_ENABLE_SPKR;
 312                         link->conf.Status = CCSR_AUDIO_ENA;
 313                 }
 314
 315                 /* Use power settings for Vcc and Vpp if present */
 316                 /*  Note that the CIS values need to be rescaled */
 317                 if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM))
 318                         link->conf.Vcc = cfg->vcc.param[CISTPL_POWER_VNOM]/10000;
 319                 else if (dflt.vcc.present & (1<<CISTPL_POWER_VNOM))
 320                         link->conf.Vcc = dflt.vcc.param[CISTPL_POWER_VNOM]/10000;
 321
 322                 if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
 323                         link->conf.Vpp1 = link->conf.Vpp2 =
 324                                 cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
 325                 else if (dflt.vpp1.present & (1<<CISTPL_POWER_VNOM))
 326                         link->conf.Vpp1 = link->conf.Vpp2 =
 327                                 dflt.vpp1.param[CISTPL_POWER_VNOM]/10000;
 328
 329                 /* Do we need to allocate an interrupt? */
 330                 if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1)
 331                         link->conf.Attributes |= CONF_ENABLE_IRQ;
 332
 333                 /* IO window settings */
 334                 link->io.NumPorts1 = link->io.NumPorts2 = 0;
 335                 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
 336                         cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
 337                         link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
 338                         if (!(io->flags & CISTPL_IO_8BIT))
 339                                 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
 340                         if (!(io->flags & CISTPL_IO_16BIT))
 341                                 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 342                         link->io.BasePort1 = io->win[0].base;
 343                         link->io.NumPorts1 = io->win[0].len;
 344                         if (io->nwin > 1) {
 345                                 link->io.Attributes2 = link->io.Attributes1;
 346                                 link->io.BasePort2 = io->win[1].base;
 347                                 link->io.NumPorts2 = io->win[1].len;
 348                         }
 349                 }
 350
 351                 /* This reserves IO space but doesn't actually enable it */
 352                 if (pcmcia_request_io(link->handle, &link->io) != 0)
 353                         goto next_entry;
 354
 355                 /* If we got this far, we're cool! */
 356                 break;
 357
 358         next_entry:
 359                 CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(handle, &tuple));
 360         }
 361
 362         /*
 363           Allocate an interrupt line.  Note that this does not assign a
 364           handler to the interrupt, unless the 'Handler' member of the
 365           irq structure is initialized.
 366         */
 367         if (link->conf.Attributes & CONF_ENABLE_IRQ)
 368                 CS_CHECK(RequestIRQ, pcmcia_request_irq(link->handle, &link->irq));
 369
 370         /*
 371           This actually configures the PCMCIA socket -- setting up
 372           the I/O windows and the interrupt mapping, and putting the
 373           card and host interface into "Memory and IO" mode.
 374         */
 375         CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf));
 376
 377         if (link->irq.AssignedIRQ == 0) {
 378                 printk(KERN_ALERT
 379                        "atmel: cannot assign IRQ: check that CONFIG_ISA is set in kernel config.");
 380                 goto cs_failed;
 381         }
 382
 383         ((local_info_t*)link->priv)->eth_dev =
 384                 init_atmel_card(link->irq.AssignedIRQ,
 385                                 link->io.BasePort1,
 386                                 did ? did->driver_info : ATMEL_FW_TYPE_NONE,
 387                                 &handle_to_dev(handle),
 388                                 card_present,
 389                                 link);
 390         if (!((local_info_t*)link->priv)->eth_dev)
 391                         goto cs_failed;
 392
 393
 394         /*
 395           At this point, the dev_node_t structure(s) need to be
 396           initialized and arranged in a linked list at link->dev.
 397         */
 398         strcpy(dev->node.dev_name, ((local_info_t*)link->priv)->eth_dev->name );
 399         dev->node.major = dev->node.minor = 0;
 400         link->dev = &dev->node;
 401
 402         link->state &= ~DEV_CONFIG_PENDING;
 403         return;
 404
 405  cs_failed:
 406         cs_error(link->handle, last_fn, last_ret);
 407         atmel_release(link);
 408 }
 409
 410 /*======================================================================
 411
 412   After a card is removed, atmel_release() will unregister the
 413   device, and release the PCMCIA configuration.  If the device is
 414   still open, this will be postponed until it is closed.
 415
 416   ======================================================================*/
 417
 418 static void atmel_release(dev_link_t *link)
 419 {
 420         struct net_device *dev = ((local_info_t*)link->priv)->eth_dev;
 421
 422         DEBUG(0, "atmel_release(0x%p)\n", link);
 423
 424         /* Unlink the device chain */
 425         link->dev = NULL;
 426
 427         if (dev)
 428                 stop_atmel_card(dev);
 429         ((local_info_t*)link->priv)->eth_dev = NULL;
 430
 431         /* Don't bother checking to see if these succeed or not */
 432         pcmcia_release_configuration(link->handle);
 433         if (link->io.NumPorts1)
 434                 pcmcia_release_io(link->handle, &link->io);
 435         if (link->irq.AssignedIRQ)
 436                 pcmcia_release_irq(link->handle, &link->irq);
 437         link->state &= ~DEV_CONFIG;
 438 }
 439
 440 static int atmel_suspend(struct pcmcia_device *dev)
 441 {
 442         dev_link_t *link = dev_to_instance(dev);
 443         local_info_t *local = link->priv;
 444
 445         link->state |= DEV_SUSPEND;
 446         if (link->state & DEV_CONFIG) {
 447                 netif_device_detach(local->eth_dev);
 448                 pcmcia_release_configuration(link->handle);
 449         }
 450
 451         return 0;
 452 }
 453
 454 static int atmel_resume(struct pcmcia_device *dev)
 455 {
 456         dev_link_t *link = dev_to_instance(dev);
 457         local_info_t *local = link->priv;
 458
 459         link->state &= ~DEV_SUSPEND;
 460         if (link->state & DEV_CONFIG) {
 461                 pcmcia_request_configuration(link->handle, &link->conf);
 462                 atmel_open(local->eth_dev);
 463                 netif_device_attach(local->eth_dev);
 464         }
 465
 466         return 0;
 467 }
 468
 469 /*====================================================================*/
 470 /* We use the driver_info field to store the correct firmware type for a card. */
 471
 472 #define PCMCIA_DEVICE_MANF_CARD_INFO(manf, card, info) { \
 473         .match_flags = PCMCIA_DEV_ID_MATCH_MANF_ID| \
 474                         PCMCIA_DEV_ID_MATCH_CARD_ID, \
 475         .manf_id = (manf), \
 476         .card_id = (card), \
 477         .driver_info = (kernel_ulong_t)(info), }
 478
 479 #define PCMCIA_DEVICE_PROD_ID12_INFO(v1, v2, vh1, vh2, info) { \
 480         .match_flags = PCMCIA_DEV_ID_MATCH_PROD_ID1| \
 481                         PCMCIA_DEV_ID_MATCH_PROD_ID2, \
 482         .prod_id = { (v1), (v2), NULL, NULL }, \
 483         .prod_id_hash = { (vh1), (vh2), 0, 0 }, \
 484         .driver_info = (kernel_ulong_t)(info), }
 485
 486 static struct pcmcia_device_id atmel_ids[] = {
 487         PCMCIA_DEVICE_MANF_CARD_INFO(0x0101, 0x0620, ATMEL_FW_TYPE_502_3COM),
 488         PCMCIA_DEVICE_MANF_CARD_INFO(0x0101, 0x0696, ATMEL_FW_TYPE_502_3COM),
 489         PCMCIA_DEVICE_MANF_CARD_INFO(0x01bf, 0x3302, ATMEL_FW_TYPE_502E),
 490         PCMCIA_DEVICE_MANF_CARD_INFO(0xd601, 0x0007, ATMEL_FW_TYPE_502),
 491         PCMCIA_DEVICE_PROD_ID12_INFO("11WAVE", "11WP611AL-E", 0x9eb2da1f, 0xc9a0d3f9, ATMEL_FW_TYPE_502E),
 492         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR", 0xabda4164, 0x41b37e1f, ATMEL_FW_TYPE_502),
 493         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR_D", 0xabda4164, 0x3675d704, ATMEL_FW_TYPE_502D),
 494         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR_E", 0xabda4164, 0x4172e792, ATMEL_FW_TYPE_502E),
 495         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504_R", 0xabda4164, 0x917f3d72, ATMEL_FW_TYPE_504_2958),
 496         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504", 0xabda4164, 0x5040670a, ATMEL_FW_TYPE_504),
 497         PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504A", 0xabda4164, 0xe15ed87f, ATMEL_FW_TYPE_504A_2958),
 498         PCMCIA_DEVICE_PROD_ID12_INFO("BT", "Voyager 1020 Laptop Adapter", 0xae49b86a, 0x1e957cd5, ATMEL_FW_TYPE_502),
 499         PCMCIA_DEVICE_PROD_ID12_INFO("CNet", "CNWLC 11Mbps Wireless PC Card V-5", 0xbc477dde, 0x502fae6b, ATMEL_FW_TYPE_502E),
 500         PCMCIA_DEVICE_PROD_ID12_INFO("IEEE 802.11b", "Wireless LAN PC Card", 0x5b878724, 0x122f1df6, ATMEL_FW_TYPE_502),
 501         PCMCIA_DEVICE_PROD_ID12_INFO("IEEE 802.11b", "Wireless LAN Card S", 0x5b878724, 0x5fba533a, ATMEL_FW_TYPE_504_2958),
 502         PCMCIA_DEVICE_PROD_ID12_INFO("OEM", "11Mbps Wireless LAN PC Card V-3", 0xfea54c90, 0x1c5b0f68, ATMEL_FW_TYPE_502),
 503         PCMCIA_DEVICE_PROD_ID12_INFO("SMC", "2632W", 0xc4f8b18b, 0x30f38774, ATMEL_FW_TYPE_502D),
 504         PCMCIA_DEVICE_PROD_ID12_INFO("SMC", "2632W-V2", 0xc4f8b18b, 0x172d1377, ATMEL_FW_TYPE_502),
 505         PCMCIA_DEVICE_PROD_ID12_INFO("Wireless", "PC_CARD", 0xa407ecdd, 0x119f6314, ATMEL_FW_TYPE_502D),
 506         PCMCIA_DEVICE_PROD_ID12_INFO("WLAN", "802.11b PC CARD", 0x575c516c, 0xb1f6dbc4, ATMEL_FW_TYPE_502D),
 507         PCMCIA_DEVICE_PROD_ID12_INFO("LG", "LW2100N", 0xb474d43a, 0x6b1fec94, ATMEL_FW_TYPE_502E),
 508         PCMCIA_DEVICE_NULL
 509 };
 510
 511 MODULE_DEVICE_TABLE(pcmcia, atmel_ids);
 512
 513 static struct pcmcia_driver atmel_driver = {
 514         .owner          = THIS_MODULE,
 515         .drv            = {
 516                 .name   = "atmel_cs",
 517         },
 518         .probe          = atmel_attach,
 519         .remove         = atmel_detach,
 520         .id_table       = atmel_ids,
 521         .suspend        = atmel_suspend,
 522         .resume         = atmel_resume,
 523 };
 524
 525 static int atmel_cs_init(void)
 526 {
 527         return pcmcia_register_driver(&atmel_driver);
 528 }
 529
 530 static void atmel_cs_cleanup(void)
 531 {
 532         pcmcia_unregister_driver(&atmel_driver);
 533 }
 534
 535 /*
 536     This program is free software; you can redistribute it and/or
 537     modify it under the terms of the GNU General Public License
 538     as published by the Free Software Foundation; either version 2
 539     of the License, or (at your option) any later version.
 540
 541     This program is distributed in the hope that it will be useful,
 542     but WITHOUT ANY WARRANTY; without even the implied warranty of
 543     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 544     GNU General Public License for more details.
 545
 546     In addition:
 547
 548     Redistribution and use in source and binary forms, with or without
 549     modification, are permitted provided that the following conditions
 550     are met:
 551
 552     1. Redistributions of source code must retain the above copyright
 553        notice, this list of conditions and the following disclaimer.
 554     2. Redistributions in binary form must reproduce the above copyright
 555        notice, this list of conditions and the following disclaimer in the
 556        documentation and/or other materials provided with the distribution.
 557     3. The name of the author may not be used to endorse or promote
 558        products derived from this software without specific prior written
 559        permission.
 560
 561     THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 562     IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 563     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 564     ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 565     INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 566     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 567     SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 568     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 569     STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 570     IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 571     POSSIBILITY OF SUCH DAMAGE.
 572 */
 573
 574 module_init(atmel_cs_init);
 575 module_exit(atmel_cs_cleanup);