File: /usr/src/linux/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 <dhinds@hyper.stanford.edu>. Portions created by David A. Hinds
19 are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
20
21 ======================================================================*/
22
23 #include <linux/config.h>
24 #ifdef __IN_PCMCIA_PACKAGE__
25 #include <pcmcia/k_compat.h>
26 #endif
27
28 #include <linux/init.h>
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31
32 #include <linux/sched.h>
33 #include <linux/ptrace.h>
34 #include <linux/slab.h>
35 #include <linux/string.h>
36 #include <linux/timer.h>
37 #include <linux/netdevice.h>
38 #include <asm/io.h>
39 #include <asm/system.h>
40
41 #include <pcmcia/version.h>
42 #include <pcmcia/cs_types.h>
43 #include <pcmcia/cs.h>
44 #include <pcmcia/cistpl.h>
45 #include <pcmcia/cisreg.h>
46 #include <pcmcia/ds.h>
47
48 /*
49 All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
50 you do not define PCMCIA_DEBUG at all, all the debug code will be
51 left out. If you compile with PCMCIA_DEBUG=0, the debug code will
52 be present but disabled -- but it can then be enabled for specific
53 modules at load time with a 'pc_debug=#' option to insmod.
54 */
55 #ifdef PCMCIA_DEBUG
56 static int pc_debug = PCMCIA_DEBUG;
57 MODULE_PARM(pc_debug, "i");
58 static char *version = "$Revision: 1.2 $";
59 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
60 #else
61 #define DEBUG(n, args...)
62 #endif
63
64 /*====================================================================*/
65
66 /* Parameters that can be set with 'insmod' */
67
68 /* The old way: bit map of interrupts to choose from */
69 /* This means pick from 15, 14, 12, 11, 10, 9, 7, 5, 4, and 3 */
70 static u_int irq_mask = 0xdeb8;
71 /* Newer, simpler way of listing specific interrupts */
72 static int irq_list[4] = { -1 };
73
74 MODULE_AUTHOR("Benjamin Reed");
75 MODULE_DESCRIPTION("Support for Cisco/Aironet 802.11 wireless ethernet \
76 cards. This is the module that links the PCMCIA card \
77 with the airo module.");
78 MODULE_LICENSE("Dual BSD/GPL");
79 MODULE_SUPPORTED_DEVICE("Aironet 4500, 4800 and Cisco 340 PCMCIA cards");
80 MODULE_PARM(irq_mask, "i");
81 MODULE_PARM(irq_list, "1-4i");
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 airo_cs
91 event handler.
92 */
93
94 struct net_device *init_airo_card( int, int, int );
95 void stop_airo_card( struct net_device *, int );
96 int reset_airo_card( struct net_device * );
97
98 static void airo_config(dev_link_t *link);
99 static void airo_release(u_long arg);
100 static int airo_event(event_t event, int priority,
101 event_callback_args_t *args);
102
103 /*
104 The attach() and detach() entry points are used to create and destroy
105 "instances" of the driver, where each instance represents everything
106 needed to manage one actual PCMCIA card.
107 */
108
109 static dev_link_t *airo_attach(void);
110 static void airo_detach(dev_link_t *);
111
112 /*
113 You'll also need to prototype all the functions that will actually
114 be used to talk to your device. See 'pcmem_cs' for a good example
115 of a fully self-sufficient driver; the other drivers rely more or
116 less on other parts of the kernel.
117 */
118
119 /*
120 The dev_info variable is the "key" that is used to match up this
121 device driver with appropriate cards, through the card configuration
122 database.
123 */
124
125 static dev_info_t dev_info = "airo_cs";
126
127 /*
128 A linked list of "instances" of the aironet device. Each actual
129 PCMCIA card corresponds to one device instance, and is described
130 by one dev_link_t structure (defined in ds.h).
131
132 You may not want to use a linked list for this -- for example, the
133 memory card driver uses an array of dev_link_t pointers, where minor
134 device numbers are used to derive the corresponding array index.
135 */
136
137 static dev_link_t *dev_list = NULL;
138
139 /*
140 A dev_link_t structure has fields for most things that are needed
141 to keep track of a socket, but there will usually be some device
142 specific information that also needs to be kept track of. The
143 'priv' pointer in a dev_link_t structure can be used to point to
144 a device-specific private data structure, like this.
145
146 A driver needs to provide a dev_node_t structure for each device
147 on a card. In some cases, there is only one device per card (for
148 example, ethernet cards, modems). In other cases, there may be
149 many actual or logical devices (SCSI adapters, memory cards with
150 multiple partitions). The dev_node_t structures need to be kept
151 in a linked list starting at the 'dev' field of a dev_link_t
152 structure. We allocate them in the card's private data structure,
153 because they generally shouldn't be allocated dynamically.
154
155 In this case, we also provide a flag to indicate if a device is
156 "stopped" due to a power management event, or card ejection. The
157 device IO routines can use a flag like this to throttle IO to a
158 card that is not ready to accept it.
159 */
160
161 typedef struct local_info_t {
162 dev_node_t node;
163 struct net_device *eth_dev;
164 } local_info_t;
165
166 /*====================================================================*/
167
168 static void cs_error(client_handle_t handle, int func, int ret)
169 {
170 error_info_t err = { func, ret };
171 CardServices(ReportError, handle, &err);
172 }
173
174 /*======================================================================
175
176 This bit of code is used to avoid unregistering network devices
177 at inappropriate times. 2.2 and later kernels are fairly picky
178 about when this can happen.
179
180 ======================================================================*/
181
182 static void flush_stale_links(void)
183 {
184 dev_link_t *link, *next;
185 for (link = dev_list; link; link = next) {
186 next = link->next;
187 if (link->state & DEV_STALE_LINK)
188 airo_detach(link);
189 }
190 }
191
192 /*======================================================================
193
194 airo_attach() creates an "instance" of the driver, allocating
195 local data structures for one device. The device is registered
196 with Card Services.
197
198 The dev_link structure is initialized, but we don't actually
199 configure the card at this point -- we wait until we receive a
200 card insertion event.
201
202 ======================================================================*/
203
204 static dev_link_t *airo_attach(void)
205 {
206 client_reg_t client_reg;
207 dev_link_t *link;
208 local_info_t *local;
209 int ret, i;
210
211 DEBUG(0, "airo_attach()\n");
212 flush_stale_links();
213
214 /* Initialize the dev_link_t structure */
215 link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL);
216 if (!link) {
217 printk(KERN_ERR "airo_cs: no memory for new device\n");
218 return NULL;
219 }
220 memset(link, 0, sizeof(struct dev_link_t));
221 link->release.function = &airo_release;
222 link->release.data = (u_long)link;
223
224 /* Interrupt setup */
225 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
226 link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID;
227 if (irq_list[0] == -1)
228 link->irq.IRQInfo2 = irq_mask;
229 else
230 for (i = 0; i < 4; i++)
231 link->irq.IRQInfo2 |= 1 << irq_list[i];
232 link->irq.Handler = NULL;
233
234 /*
235 General socket configuration defaults can go here. In this
236 client, we assume very little, and rely on the CIS for almost
237 everything. In most clients, many details (i.e., number, sizes,
238 and attributes of IO windows) are fixed by the nature of the
239 device, and can be hard-wired here.
240 */
241 link->conf.Attributes = 0;
242 link->conf.Vcc = 50;
243 link->conf.IntType = INT_MEMORY_AND_IO;
244
245 /* Allocate space for private device-specific data */
246 local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
247 memset(local, 0, sizeof(local_info_t));
248 link->priv = local;
249
250 /* Register with Card Services */
251 link->next = dev_list;
252 dev_list = link;
253 client_reg.dev_info = &dev_info;
254 client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
255 client_reg.EventMask =
256 CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
257 CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
258 CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
259 client_reg.event_handler = &airo_event;
260 client_reg.Version = 0x0210;
261 client_reg.event_callback_args.client_data = link;
262 ret = CardServices(RegisterClient, &link->handle, &client_reg);
263 if (ret != 0) {
264 cs_error(link->handle, RegisterClient, ret);
265 airo_detach(link);
266 return NULL;
267 }
268
269 return link;
270 } /* airo_attach */
271
272 /*======================================================================
273
274 This deletes a driver "instance". The device is de-registered
275 with Card Services. If it has been released, all local data
276 structures are freed. Otherwise, the structures will be freed
277 when the device is released.
278
279 ======================================================================*/
280
281 static void airo_detach(dev_link_t *link)
282 {
283 dev_link_t **linkp;
284
285 DEBUG(0, "airo_detach(0x%p)\n", link);
286
287 /* Locate device structure */
288 for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
289 if (*linkp == link) break;
290 if (*linkp == NULL)
291 return;
292
293 del_timer(&link->release);
294 if ( link->state & DEV_CONFIG ) {
295 airo_release( (int)link );
296 if ( link->state & DEV_STALE_CONFIG ) {
297 link->state |= DEV_STALE_LINK;
298 return;
299 }
300 }
301
302 if ( ((local_info_t*)link->priv)->eth_dev ) {
303 stop_airo_card( ((local_info_t*)link->priv)->eth_dev, 0 );
304 }
305 ((local_info_t*)link->priv)->eth_dev = 0;
306
307 /* Break the link with Card Services */
308 if (link->handle)
309 CardServices(DeregisterClient, link->handle);
310
311
312
313 /* Unlink device structure, free pieces */
314 *linkp = link->next;
315 if (link->priv) {
316 kfree(link->priv);
317 }
318 kfree(link);
319
320 } /* airo_detach */
321
322 /*======================================================================
323
324 airo_config() is scheduled to run after a CARD_INSERTION event
325 is received, to configure the PCMCIA socket, and to make the
326 device available to the system.
327
328 ======================================================================*/
329
330 #define CS_CHECK(fn, args...) \
331 while ((last_ret=CardServices(last_fn=(fn),args))!=0) goto cs_failed
332
333 #define CFG_CHECK(fn, args...) \
334 if (CardServices(fn, args) != 0) goto next_entry
335
336 static void airo_config(dev_link_t *link)
337 {
338 client_handle_t handle;
339 tuple_t tuple;
340 cisparse_t parse;
341 local_info_t *dev;
342 int last_fn, last_ret;
343 u_char buf[64];
344 win_req_t req;
345 memreq_t map;
346
347 handle = link->handle;
348 dev = link->priv;
349
350 DEBUG(0, "airo_config(0x%p)\n", link);
351
352 /*
353 This reads the card's CONFIG tuple to find its configuration
354 registers.
355 */
356 tuple.DesiredTuple = CISTPL_CONFIG;
357 tuple.Attributes = 0;
358 tuple.TupleData = buf;
359 tuple.TupleDataMax = sizeof(buf);
360 tuple.TupleOffset = 0;
361 CS_CHECK(GetFirstTuple, handle, &tuple);
362 CS_CHECK(GetTupleData, handle, &tuple);
363 CS_CHECK(ParseTuple, handle, &tuple, &parse);
364 link->conf.ConfigBase = parse.config.base;
365 link->conf.Present = parse.config.rmask[0];
366
367 /* Configure card */
368 link->state |= DEV_CONFIG;
369
370 /*
371 In this loop, we scan the CIS for configuration table entries,
372 each of which describes a valid card configuration, including
373 voltage, IO window, memory window, and interrupt settings.
374
375 We make no assumptions about the card to be configured: we use
376 just the information available in the CIS. In an ideal world,
377 this would work for any PCMCIA card, but it requires a complete
378 and accurate CIS. In practice, a driver usually "knows" most of
379 these things without consulting the CIS, and most client drivers
380 will only use the CIS to fill in implementation-defined details.
381 */
382 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
383 CS_CHECK(GetFirstTuple, handle, &tuple);
384 while (1) {
385 cistpl_cftable_entry_t dflt = { 0 };
386 cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
387 CFG_CHECK(GetTupleData, handle, &tuple);
388 CFG_CHECK(ParseTuple, handle, &tuple, &parse);
389
390 if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
391 if (cfg->index == 0) goto next_entry;
392 link->conf.ConfigIndex = cfg->index;
393
394 /* Does this card need audio output? */
395 if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
396 link->conf.Attributes |= CONF_ENABLE_SPKR;
397 link->conf.Status = CCSR_AUDIO_ENA;
398 }
399
400 /* Use power settings for Vcc and Vpp if present */
401 /* Note that the CIS values need to be rescaled */
402 if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM))
403 link->conf.Vcc = cfg->vcc.param[CISTPL_POWER_VNOM]/10000;
404 else if (dflt.vcc.present & (1<<CISTPL_POWER_VNOM))
405 link->conf.Vcc = dflt.vcc.param[CISTPL_POWER_VNOM]/10000;
406
407 if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
408 link->conf.Vpp1 = link->conf.Vpp2 =
409 cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
410 else if (dflt.vpp1.present & (1<<CISTPL_POWER_VNOM))
411 link->conf.Vpp1 = link->conf.Vpp2 =
412 dflt.vpp1.param[CISTPL_POWER_VNOM]/10000;
413
414 /* Do we need to allocate an interrupt? */
415 if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1)
416 link->conf.Attributes |= CONF_ENABLE_IRQ;
417
418 /* IO window settings */
419 link->io.NumPorts1 = link->io.NumPorts2 = 0;
420 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
421 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
422 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
423 if (!(io->flags & CISTPL_IO_8BIT))
424 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
425 if (!(io->flags & CISTPL_IO_16BIT))
426 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
427 link->io.BasePort1 = io->win[0].base;
428 link->io.NumPorts1 = io->win[0].len;
429 if (io->nwin > 1) {
430 link->io.Attributes2 = link->io.Attributes1;
431 link->io.BasePort2 = io->win[1].base;
432 link->io.NumPorts2 = io->win[1].len;
433 }
434 }
435
436 /* This reserves IO space but doesn't actually enable it */
437 CFG_CHECK(RequestIO, link->handle, &link->io);
438
439 /*
440 Now set up a common memory window, if needed. There is room
441 in the dev_link_t structure for one memory window handle,
442 but if the base addresses need to be saved, or if multiple
443 windows are needed, the info should go in the private data
444 structure for this device.
445
446 Note that the memory window base is a physical address, and
447 needs to be mapped to virtual space with ioremap() before it
448 is used.
449 */
450 if ((cfg->mem.nwin > 0) || (dflt.mem.nwin > 0)) {
451 cistpl_mem_t *mem =
452 (cfg->mem.nwin) ? &cfg->mem : &dflt.mem;
453 req.Attributes = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM;
454 req.Base = mem->win[0].host_addr;
455 req.Size = mem->win[0].len;
456 req.AccessSpeed = 0;
457 link->win = (window_handle_t)link->handle;
458 CFG_CHECK(RequestWindow, &link->win, &req);
459 map.Page = 0; map.CardOffset = mem->win[0].card_addr;
460 CFG_CHECK(MapMemPage, link->win, &map);
461 }
462 /* If we got this far, we're cool! */
463 break;
464
465 next_entry:
466 CS_CHECK(GetNextTuple, handle, &tuple);
467 }
468
469 /*
470 Allocate an interrupt line. Note that this does not assign a
471 handler to the interrupt, unless the 'Handler' member of the
472 irq structure is initialized.
473 */
474 if (link->conf.Attributes & CONF_ENABLE_IRQ)
475 CS_CHECK(RequestIRQ, link->handle, &link->irq);
476
477 /*
478 This actually configures the PCMCIA socket -- setting up
479 the I/O windows and the interrupt mapping, and putting the
480 card and host interface into "Memory and IO" mode.
481 */
482 CS_CHECK(RequestConfiguration, link->handle, &link->conf);
483 ((local_info_t*)link->priv)->eth_dev =
484 init_airo_card( link->irq.AssignedIRQ,
485 link->io.BasePort1, 1 );
486 if (!((local_info_t*)link->priv)->eth_dev) goto cs_failed;
487
488 /*
489 At this point, the dev_node_t structure(s) need to be
490 initialized and arranged in a linked list at link->dev.
491 */
492 strcpy(dev->node.dev_name, ((local_info_t*)link->priv)->eth_dev->name );
493 dev->node.major = dev->node.minor = 0;
494 link->dev = &dev->node;
495
496 /* Finally, report what we've done */
497 printk(KERN_INFO "%s: index 0x%02x: Vcc %d.%d",
498 dev->node.dev_name, link->conf.ConfigIndex,
499 link->conf.Vcc/10, link->conf.Vcc%10);
500 if (link->conf.Vpp1)
501 printk(", Vpp %d.%d", link->conf.Vpp1/10, link->conf.Vpp1%10);
502 if (link->conf.Attributes & CONF_ENABLE_IRQ)
503 printk(", irq %d", link->irq.AssignedIRQ);
504 if (link->io.NumPorts1)
505 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
506 link->io.BasePort1+link->io.NumPorts1-1);
507 if (link->io.NumPorts2)
508 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
509 link->io.BasePort2+link->io.NumPorts2-1);
510 if (link->win)
511 printk(", mem 0x%06lx-0x%06lx", req.Base,
512 req.Base+req.Size-1);
513 printk("\n");
514
515 link->state &= ~DEV_CONFIG_PENDING;
516 return;
517
518 cs_failed:
519 cs_error(link->handle, last_fn, last_ret);
520 airo_release((u_long)link);
521
522 } /* airo_config */
523
524 /*======================================================================
525
526 After a card is removed, airo_release() will unregister the
527 device, and release the PCMCIA configuration. If the device is
528 still open, this will be postponed until it is closed.
529
530 ======================================================================*/
531
532 static void airo_release(u_long arg)
533 {
534 dev_link_t *link = (dev_link_t *)arg;
535
536 DEBUG(0, "airo_release(0x%p)\n", link);
537
538 /*
539 If the device is currently in use, we won't release until it
540 is actually closed, because until then, we can't be sure that
541 no one will try to access the device or its data structures.
542 */
543 if (link->open) {
544 DEBUG(1, "airo_cs: release postponed, '%s' still open\n",
545 link->dev->dev_name);
546 link->state |= DEV_STALE_CONFIG;
547 return;
548 }
549
550 /* Unlink the device chain */
551 link->dev = NULL;
552
553 /*
554 In a normal driver, additional code may be needed to release
555 other kernel data structures associated with this device.
556 */
557
558 /* Don't bother checking to see if these succeed or not */
559 if (link->win)
560 CardServices(ReleaseWindow, link->win);
561 CardServices(ReleaseConfiguration, link->handle);
562 if (link->io.NumPorts1)
563 CardServices(ReleaseIO, link->handle, &link->io);
564 if (link->irq.AssignedIRQ)
565 CardServices(ReleaseIRQ, link->handle, &link->irq);
566 link->state &= ~DEV_CONFIG;
567
568 } /* airo_release */
569
570 /*======================================================================
571
572 The card status event handler. Mostly, this schedules other
573 stuff to run after an event is received.
574
575 When a CARD_REMOVAL event is received, we immediately set a
576 private flag to block future accesses to this device. All the
577 functions that actually access the device should check this flag
578 to make sure the card is still present.
579
580 ======================================================================*/
581
582 static int airo_event(event_t event, int priority,
583 event_callback_args_t *args)
584 {
585 dev_link_t *link = args->client_data;
586 local_info_t *local = link->priv;
587
588 DEBUG(1, "airo_event(0x%06x)\n", event);
589
590 switch (event) {
591 case CS_EVENT_CARD_REMOVAL:
592 link->state &= ~DEV_PRESENT;
593 if (link->state & DEV_CONFIG) {
594 netif_device_detach(local->eth_dev);
595 mod_timer(&link->release, jiffies + HZ/20);
596 }
597 break;
598 case CS_EVENT_CARD_INSERTION:
599 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
600 airo_config(link);
601 break;
602 case CS_EVENT_PM_SUSPEND:
603 link->state |= DEV_SUSPEND;
604 /* Fall through... */
605 case CS_EVENT_RESET_PHYSICAL:
606 if (link->state & DEV_CONFIG) {
607 netif_device_detach(local->eth_dev);
608 CardServices(ReleaseConfiguration, link->handle);
609 }
610 break;
611 case CS_EVENT_PM_RESUME:
612 link->state &= ~DEV_SUSPEND;
613 /* Fall through... */
614 case CS_EVENT_CARD_RESET:
615 if (link->state & DEV_CONFIG) {
616 CardServices(RequestConfiguration, link->handle, &link->conf);
617 reset_airo_card(local->eth_dev);
618 netif_device_attach(local->eth_dev);
619 }
620 break;
621 }
622 return 0;
623 } /* airo_event */
624
625 /*====================================================================*/
626
627 static int airo_cs_init(void)
628 {
629 servinfo_t serv;
630 DEBUG(0, "%s\n", version);
631 CardServices(GetCardServicesInfo, &serv);
632 if (serv.Revision != CS_RELEASE_CODE) {
633 printk(KERN_NOTICE "airo_cs: Card Services release "
634 "does not match!\n");
635 return -1;
636 }
637 register_pcmcia_driver(&dev_info, &airo_attach, &airo_detach);
638 return 0;
639 }
640
641 static void airo_cs_cleanup(void)
642 {
643 DEBUG(0, "airo_cs: unloading\n");
644 unregister_pcmcia_driver(&dev_info);
645 while (dev_list != NULL) {
646 if (dev_list->state & DEV_CONFIG)
647 airo_release((u_long)dev_list);
648 airo_detach(dev_list);
649 }
650 }
651
652 /*
653 This program is free software; you can redistribute it and/or
654 modify it under the terms of the GNU General Public License
655 as published by the Free Software Foundation; either version 2
656 of the License, or (at your option) any later version.
657
658 This program is distributed in the hope that it will be useful,
659 but WITHOUT ANY WARRANTY; without even the implied warranty of
660 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
661 GNU General Public License for more details.
662
663 In addition:
664
665 Redistribution and use in source and binary forms, with or without
666 modification, are permitted provided that the following conditions
667 are met:
668
669 1. Redistributions of source code must retain the above copyright
670 notice, this list of conditions and the following disclaimer.
671 2. Redistributions in binary form must reproduce the above copyright
672 notice, this list of conditions and the following disclaimer in the
673 documentation and/or other materials provided with the distribution.
674 3. The name of the author may not be used to endorse or promote
675 products derived from this software without specific prior written
676 permission.
677
678 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
679 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
680 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
681 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
682 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
683 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
684 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
685 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
686 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
687 IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
688 POSSIBILITY OF SUCH DAMAGE.
689 */
690
691 module_init(airo_cs_init);
692 module_exit(airo_cs_cleanup);
693