]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * cs.c -- Kernel Card Services - core services | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * The initial developer of the original code is David A. Hinds | |
9 | * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds | |
10 | * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. | |
11 | * | |
12 | * (C) 1999 David A. Hinds | |
13 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/moduleparam.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/kernel.h> | |
1da177e4 LT |
19 | #include <linux/string.h> |
20 | #include <linux/major.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/mm.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/timer.h> | |
26 | #include <linux/ioport.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/pm.h> | |
1da177e4 | 29 | #include <linux/device.h> |
1da9ab73 | 30 | #include <linux/kthread.h> |
7dfb7103 | 31 | #include <linux/freezer.h> |
1da177e4 LT |
32 | #include <asm/system.h> |
33 | #include <asm/irq.h> | |
34 | ||
1da177e4 LT |
35 | #include <pcmcia/cs_types.h> |
36 | #include <pcmcia/ss.h> | |
37 | #include <pcmcia/cs.h> | |
1da177e4 LT |
38 | #include <pcmcia/cistpl.h> |
39 | #include <pcmcia/cisreg.h> | |
40 | #include <pcmcia/ds.h> | |
41 | #include "cs_internal.h" | |
42 | ||
1da177e4 LT |
43 | |
44 | /* Module parameters */ | |
45 | ||
46 | MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); | |
33519ddd | 47 | MODULE_DESCRIPTION("Linux Kernel Card Services"); |
1da177e4 LT |
48 | MODULE_LICENSE("GPL"); |
49 | ||
50 | #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444) | |
51 | ||
52 | INT_MODULE_PARM(setup_delay, 10); /* centiseconds */ | |
53 | INT_MODULE_PARM(resume_delay, 20); /* centiseconds */ | |
54 | INT_MODULE_PARM(shutdown_delay, 3); /* centiseconds */ | |
55 | INT_MODULE_PARM(vcc_settle, 40); /* centiseconds */ | |
56 | INT_MODULE_PARM(reset_time, 10); /* usecs */ | |
57 | INT_MODULE_PARM(unreset_delay, 10); /* centiseconds */ | |
58 | INT_MODULE_PARM(unreset_check, 10); /* centiseconds */ | |
59 | INT_MODULE_PARM(unreset_limit, 30); /* unreset_check's */ | |
60 | ||
61 | /* Access speed for attribute memory windows */ | |
62 | INT_MODULE_PARM(cis_speed, 300); /* ns */ | |
63 | ||
1da177e4 LT |
64 | |
65 | socket_state_t dead_socket = { | |
66 | .csc_mask = SS_DETECT, | |
67 | }; | |
33519ddd | 68 | EXPORT_SYMBOL(dead_socket); |
1da177e4 LT |
69 | |
70 | ||
71 | /* List of all sockets, protected by a rwsem */ | |
72 | LIST_HEAD(pcmcia_socket_list); | |
1da177e4 | 73 | EXPORT_SYMBOL(pcmcia_socket_list); |
1da177e4 | 74 | |
33519ddd DB |
75 | DECLARE_RWSEM(pcmcia_socket_list_rwsem); |
76 | EXPORT_SYMBOL(pcmcia_socket_list_rwsem); | |
1da177e4 | 77 | |
1da177e4 | 78 | |
78187865 | 79 | /* |
33519ddd DB |
80 | * Low-level PCMCIA socket drivers need to register with the PCCard |
81 | * core using pcmcia_register_socket. | |
82 | * | |
83 | * socket drivers are expected to use the following callbacks in their | |
1da177e4 LT |
84 | * .drv struct: |
85 | * - pcmcia_socket_dev_suspend | |
86 | * - pcmcia_socket_dev_resume | |
87 | * These functions check for the appropriate struct pcmcia_soket arrays, | |
88 | * and pass them to the low-level functions pcmcia_{suspend,resume}_socket | |
89 | */ | |
9905d1b4 RW |
90 | static int socket_early_resume(struct pcmcia_socket *skt); |
91 | static int socket_late_resume(struct pcmcia_socket *skt); | |
1da177e4 LT |
92 | static int socket_resume(struct pcmcia_socket *skt); |
93 | static int socket_suspend(struct pcmcia_socket *skt); | |
94 | ||
9905d1b4 RW |
95 | static void pcmcia_socket_dev_run(struct device *dev, |
96 | int (*cb)(struct pcmcia_socket *)) | |
1da177e4 LT |
97 | { |
98 | struct pcmcia_socket *socket; | |
99 | ||
100 | down_read(&pcmcia_socket_list_rwsem); | |
101 | list_for_each_entry(socket, &pcmcia_socket_list, socket_list) { | |
87373318 | 102 | if (socket->dev.parent != dev) |
1da177e4 | 103 | continue; |
7fe908dd | 104 | mutex_lock(&socket->skt_mutex); |
9905d1b4 | 105 | cb(socket); |
7fe908dd | 106 | mutex_unlock(&socket->skt_mutex); |
1da177e4 LT |
107 | } |
108 | up_read(&pcmcia_socket_list_rwsem); | |
9905d1b4 | 109 | } |
1da177e4 | 110 | |
9905d1b4 RW |
111 | int pcmcia_socket_dev_suspend(struct device *dev) |
112 | { | |
113 | pcmcia_socket_dev_run(dev, socket_suspend); | |
1da177e4 LT |
114 | return 0; |
115 | } | |
116 | EXPORT_SYMBOL(pcmcia_socket_dev_suspend); | |
117 | ||
9905d1b4 | 118 | void pcmcia_socket_dev_early_resume(struct device *dev) |
1da177e4 | 119 | { |
9905d1b4 RW |
120 | pcmcia_socket_dev_run(dev, socket_early_resume); |
121 | } | |
122 | EXPORT_SYMBOL(pcmcia_socket_dev_early_resume); | |
1da177e4 | 123 | |
9905d1b4 RW |
124 | void pcmcia_socket_dev_late_resume(struct device *dev) |
125 | { | |
126 | pcmcia_socket_dev_run(dev, socket_late_resume); | |
127 | } | |
128 | EXPORT_SYMBOL(pcmcia_socket_dev_late_resume); | |
1da177e4 | 129 | |
9905d1b4 RW |
130 | int pcmcia_socket_dev_resume(struct device *dev) |
131 | { | |
132 | pcmcia_socket_dev_run(dev, socket_resume); | |
1da177e4 LT |
133 | return 0; |
134 | } | |
135 | EXPORT_SYMBOL(pcmcia_socket_dev_resume); | |
136 | ||
137 | ||
9fea84f4 | 138 | struct pcmcia_socket *pcmcia_get_socket(struct pcmcia_socket *skt) |
1da177e4 | 139 | { |
87373318 GKH |
140 | struct device *dev = get_device(&skt->dev); |
141 | if (!dev) | |
1da177e4 | 142 | return NULL; |
593f010b | 143 | return dev_get_drvdata(dev); |
1da177e4 LT |
144 | } |
145 | EXPORT_SYMBOL(pcmcia_get_socket); | |
146 | ||
147 | ||
148 | void pcmcia_put_socket(struct pcmcia_socket *skt) | |
149 | { | |
87373318 | 150 | put_device(&skt->dev); |
1da177e4 LT |
151 | } |
152 | EXPORT_SYMBOL(pcmcia_put_socket); | |
153 | ||
154 | ||
87373318 | 155 | static void pcmcia_release_socket(struct device *dev) |
1da177e4 | 156 | { |
87373318 | 157 | struct pcmcia_socket *socket = dev_get_drvdata(dev); |
1da177e4 LT |
158 | |
159 | complete(&socket->socket_released); | |
160 | } | |
161 | ||
162 | static int pccardd(void *__skt); | |
163 | ||
164 | /** | |
165 | * pcmcia_register_socket - add a new pcmcia socket device | |
78187865 | 166 | * @socket: the &socket to register |
1da177e4 LT |
167 | */ |
168 | int pcmcia_register_socket(struct pcmcia_socket *socket) | |
169 | { | |
1da9ab73 | 170 | struct task_struct *tsk; |
1da177e4 LT |
171 | int ret; |
172 | ||
87373318 | 173 | if (!socket || !socket->ops || !socket->dev.parent || !socket->resource_ops) |
1da177e4 LT |
174 | return -EINVAL; |
175 | ||
d50dbec3 | 176 | dev_dbg(&socket->dev, "pcmcia_register_socket(0x%p)\n", socket->ops); |
1da177e4 | 177 | |
1da177e4 | 178 | /* try to obtain a socket number [yes, it gets ugly if we |
33519ddd DB |
179 | * register more than 2^sizeof(unsigned int) pcmcia |
180 | * sockets... but the socket number is deprecated | |
1da177e4 LT |
181 | * anyways, so I don't care] */ |
182 | down_write(&pcmcia_socket_list_rwsem); | |
183 | if (list_empty(&pcmcia_socket_list)) | |
184 | socket->sock = 0; | |
185 | else { | |
186 | unsigned int found, i = 1; | |
187 | struct pcmcia_socket *tmp; | |
188 | do { | |
189 | found = 1; | |
190 | list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) { | |
191 | if (tmp->sock == i) | |
192 | found = 0; | |
193 | } | |
194 | i++; | |
195 | } while (!found); | |
196 | socket->sock = i - 1; | |
197 | } | |
198 | list_add_tail(&socket->socket_list, &pcmcia_socket_list); | |
199 | up_write(&pcmcia_socket_list_rwsem); | |
200 | ||
5bc6b68a RK |
201 | #ifndef CONFIG_CARDBUS |
202 | /* | |
203 | * If we do not support Cardbus, ensure that | |
204 | * the Cardbus socket capability is disabled. | |
205 | */ | |
206 | socket->features &= ~SS_CAP_CARDBUS; | |
207 | #endif | |
1da177e4 LT |
208 | |
209 | /* set proper values in socket->dev */ | |
87373318 | 210 | dev_set_drvdata(&socket->dev, socket); |
1da177e4 | 211 | socket->dev.class = &pcmcia_socket_class; |
25096986 | 212 | dev_set_name(&socket->dev, "pcmcia_socket%u", socket->sock); |
1da177e4 LT |
213 | |
214 | /* base address = 0, map = 0 */ | |
215 | socket->cis_mem.flags = 0; | |
216 | socket->cis_mem.speed = cis_speed; | |
217 | ||
218 | INIT_LIST_HEAD(&socket->cis_cache); | |
219 | ||
220 | init_completion(&socket->socket_released); | |
221 | init_completion(&socket->thread_done); | |
7fe908dd | 222 | mutex_init(&socket->skt_mutex); |
6b8e087b | 223 | mutex_init(&socket->ops_mutex); |
1da177e4 LT |
224 | spin_lock_init(&socket->thread_lock); |
225 | ||
b1769450 DB |
226 | if (socket->resource_ops->init) { |
227 | ret = socket->resource_ops->init(socket); | |
228 | if (ret) | |
229 | goto err; | |
230 | } | |
231 | ||
1da9ab73 SH |
232 | tsk = kthread_run(pccardd, socket, "pccardd"); |
233 | if (IS_ERR(tsk)) { | |
234 | ret = PTR_ERR(tsk); | |
1da177e4 | 235 | goto err; |
1da9ab73 | 236 | } |
1da177e4 LT |
237 | |
238 | wait_for_completion(&socket->thread_done); | |
1da9ab73 | 239 | if (!socket->thread) { |
2e55bf6b DB |
240 | dev_printk(KERN_WARNING, &socket->dev, |
241 | "PCMCIA: warning: socket thread did not start\n"); | |
1da177e4 LT |
242 | return -EIO; |
243 | } | |
1da9ab73 | 244 | |
1da177e4 LT |
245 | pcmcia_parse_events(socket, SS_DETECT); |
246 | ||
638bba55 DB |
247 | /* |
248 | * Let's try to get the PCMCIA module for 16-bit PCMCIA support. | |
249 | * If it fails, it doesn't matter -- we still have 32-bit CardBus | |
250 | * support to offer, so this is not a failure mode. | |
251 | */ | |
252 | request_module_nowait("pcmcia"); | |
253 | ||
1da177e4 LT |
254 | return 0; |
255 | ||
256 | err: | |
257 | down_write(&pcmcia_socket_list_rwsem); | |
258 | list_del(&socket->socket_list); | |
259 | up_write(&pcmcia_socket_list_rwsem); | |
260 | return ret; | |
261 | } /* pcmcia_register_socket */ | |
262 | EXPORT_SYMBOL(pcmcia_register_socket); | |
263 | ||
264 | ||
265 | /** | |
266 | * pcmcia_unregister_socket - remove a pcmcia socket device | |
78187865 | 267 | * @socket: the &socket to unregister |
1da177e4 LT |
268 | */ |
269 | void pcmcia_unregister_socket(struct pcmcia_socket *socket) | |
270 | { | |
271 | if (!socket) | |
272 | return; | |
273 | ||
d50dbec3 | 274 | dev_dbg(&socket->dev, "pcmcia_unregister_socket(0x%p)\n", socket->ops); |
1da177e4 | 275 | |
0b402094 | 276 | if (socket->thread) |
1da9ab73 | 277 | kthread_stop(socket->thread); |
0b402094 | 278 | |
1da177e4 LT |
279 | /* remove from our own list */ |
280 | down_write(&pcmcia_socket_list_rwsem); | |
281 | list_del(&socket->socket_list); | |
282 | up_write(&pcmcia_socket_list_rwsem); | |
283 | ||
284 | /* wait for sysfs to drop all references */ | |
385ee871 DB |
285 | if (socket->resource_ops->exit) |
286 | socket->resource_ops->exit(socket); | |
1da177e4 LT |
287 | wait_for_completion(&socket->socket_released); |
288 | } /* pcmcia_unregister_socket */ | |
289 | EXPORT_SYMBOL(pcmcia_unregister_socket); | |
290 | ||
291 | ||
9fea84f4 | 292 | struct pcmcia_socket *pcmcia_get_socket_by_nr(unsigned int nr) |
1da177e4 LT |
293 | { |
294 | struct pcmcia_socket *s; | |
295 | ||
296 | down_read(&pcmcia_socket_list_rwsem); | |
297 | list_for_each_entry(s, &pcmcia_socket_list, socket_list) | |
298 | if (s->sock == nr) { | |
299 | up_read(&pcmcia_socket_list_rwsem); | |
300 | return s; | |
301 | } | |
302 | up_read(&pcmcia_socket_list_rwsem); | |
303 | ||
304 | return NULL; | |
305 | ||
306 | } | |
307 | EXPORT_SYMBOL(pcmcia_get_socket_by_nr); | |
308 | ||
78187865 | 309 | /* |
33519ddd DB |
310 | * The central event handler. Send_event() sends an event to the |
311 | * 16-bit subsystem, which then calls the relevant device drivers. | |
312 | * Parse_events() interprets the event bits from | |
313 | * a card status change report. Do_shutdown() handles the high | |
314 | * priority stuff associated with a card removal. | |
315 | */ | |
1da177e4 LT |
316 | |
317 | /* NOTE: send_event needs to be called with skt->sem held. */ | |
318 | ||
319 | static int send_event(struct pcmcia_socket *s, event_t event, int priority) | |
320 | { | |
321 | int ret; | |
322 | ||
88b060d6 | 323 | if ((s->state & SOCKET_CARDBUS) && (event != CS_EVENT_CARD_REMOVAL)) |
1da177e4 LT |
324 | return 0; |
325 | ||
d50dbec3 | 326 | dev_dbg(&s->dev, "send_event(event %d, pri %d, callback 0x%p)\n", |
1da177e4 LT |
327 | event, priority, s->callback); |
328 | ||
329 | if (!s->callback) | |
330 | return 0; | |
331 | if (!try_module_get(s->callback->owner)) | |
332 | return 0; | |
333 | ||
334 | ret = s->callback->event(s, event, priority); | |
335 | ||
336 | module_put(s->callback->owner); | |
337 | ||
338 | return ret; | |
339 | } | |
340 | ||
1da177e4 LT |
341 | static int socket_reset(struct pcmcia_socket *skt) |
342 | { | |
343 | int status, i; | |
344 | ||
d50dbec3 | 345 | dev_dbg(&skt->dev, "reset\n"); |
1da177e4 LT |
346 | |
347 | skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET; | |
348 | skt->ops->set_socket(skt, &skt->socket); | |
349 | udelay((long)reset_time); | |
350 | ||
351 | skt->socket.flags &= ~SS_RESET; | |
352 | skt->ops->set_socket(skt, &skt->socket); | |
353 | ||
354 | msleep(unreset_delay * 10); | |
355 | for (i = 0; i < unreset_limit; i++) { | |
356 | skt->ops->get_status(skt, &status); | |
357 | ||
358 | if (!(status & SS_DETECT)) | |
3939c1ef | 359 | return -ENODEV; |
1da177e4 LT |
360 | |
361 | if (status & SS_READY) | |
4c89e88b | 362 | return 0; |
1da177e4 LT |
363 | |
364 | msleep(unreset_check * 10); | |
365 | } | |
366 | ||
d50dbec3 | 367 | dev_printk(KERN_ERR, &skt->dev, "time out after reset.\n"); |
8567142e | 368 | return -ETIMEDOUT; |
1da177e4 LT |
369 | } |
370 | ||
78187865 | 371 | /* |
6e493882 DR |
372 | * socket_setup() and socket_shutdown() are called by the main event handler |
373 | * when card insertion and removal events are received. | |
374 | * socket_setup() turns on socket power and resets the socket, in two stages. | |
375 | * socket_shutdown() unconfigures a socket and turns off socket power. | |
376 | */ | |
377 | static void socket_shutdown(struct pcmcia_socket *s) | |
378 | { | |
379 | int status; | |
380 | ||
d50dbec3 | 381 | dev_dbg(&s->dev, "shutdown\n"); |
6e493882 | 382 | |
88b060d6 | 383 | send_event(s, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH); |
9e86749c DB |
384 | |
385 | mutex_lock(&s->ops_mutex); | |
6e493882 DR |
386 | s->state &= SOCKET_INUSE | SOCKET_PRESENT; |
387 | msleep(shutdown_delay * 10); | |
388 | s->state &= SOCKET_INUSE; | |
389 | ||
390 | /* Blank out the socket state */ | |
391 | s->socket = dead_socket; | |
392 | s->ops->init(s); | |
393 | s->ops->set_socket(s, &s->socket); | |
394 | s->irq.AssignedIRQ = s->irq.Config = 0; | |
395 | s->lock_count = 0; | |
904e3777 DB |
396 | kfree(s->fake_cis); |
397 | s->fake_cis = NULL; | |
6e493882 DR |
398 | #ifdef CONFIG_CARDBUS |
399 | cb_free(s); | |
400 | #endif | |
401 | s->functions = 0; | |
6e493882 | 402 | |
afb2c165 DR |
403 | /* give socket some time to power down */ |
404 | msleep(100); | |
405 | ||
6e493882 DR |
406 | s->ops->get_status(s, &status); |
407 | if (status & SS_POWERON) { | |
2e55bf6b DB |
408 | dev_printk(KERN_ERR, &s->dev, |
409 | "*** DANGER *** unable to remove socket power\n"); | |
6e493882 DR |
410 | } |
411 | ||
3970dd8c | 412 | s->state &= ~SOCKET_INUSE; |
9e86749c | 413 | mutex_unlock(&s->ops_mutex); |
6e493882 DR |
414 | } |
415 | ||
1da177e4 LT |
416 | static int socket_setup(struct pcmcia_socket *skt, int initial_delay) |
417 | { | |
418 | int status, i; | |
419 | ||
d50dbec3 | 420 | dev_dbg(&skt->dev, "setup\n"); |
1da177e4 LT |
421 | |
422 | skt->ops->get_status(skt, &status); | |
423 | if (!(status & SS_DETECT)) | |
3939c1ef | 424 | return -ENODEV; |
1da177e4 LT |
425 | |
426 | msleep(initial_delay * 10); | |
427 | ||
428 | for (i = 0; i < 100; i++) { | |
429 | skt->ops->get_status(skt, &status); | |
430 | if (!(status & SS_DETECT)) | |
3939c1ef | 431 | return -ENODEV; |
1da177e4 LT |
432 | |
433 | if (!(status & SS_PENDING)) | |
434 | break; | |
435 | ||
436 | msleep(100); | |
437 | } | |
438 | ||
439 | if (status & SS_PENDING) { | |
d50dbec3 DB |
440 | dev_printk(KERN_ERR, &skt->dev, |
441 | "voltage interrogation timed out.\n"); | |
8567142e | 442 | return -ETIMEDOUT; |
1da177e4 LT |
443 | } |
444 | ||
445 | if (status & SS_CARDBUS) { | |
5bc6b68a | 446 | if (!(skt->features & SS_CAP_CARDBUS)) { |
d50dbec3 DB |
447 | dev_printk(KERN_ERR, &skt->dev, |
448 | "cardbus cards are not supported.\n"); | |
610e2374 | 449 | return -EINVAL; |
5bc6b68a | 450 | } |
1da177e4 | 451 | skt->state |= SOCKET_CARDBUS; |
88b060d6 DB |
452 | } else |
453 | skt->state &= ~SOCKET_CARDBUS; | |
1da177e4 LT |
454 | |
455 | /* | |
456 | * Decode the card voltage requirements, and apply power to the card. | |
457 | */ | |
458 | if (status & SS_3VCARD) | |
459 | skt->socket.Vcc = skt->socket.Vpp = 33; | |
460 | else if (!(status & SS_XVCARD)) | |
461 | skt->socket.Vcc = skt->socket.Vpp = 50; | |
462 | else { | |
d50dbec3 | 463 | dev_printk(KERN_ERR, &skt->dev, "unsupported voltage key.\n"); |
610e2374 | 464 | return -EIO; |
1da177e4 | 465 | } |
fa912bcb DR |
466 | |
467 | if (skt->power_hook) | |
468 | skt->power_hook(skt, HOOK_POWER_PRE); | |
469 | ||
1da177e4 LT |
470 | skt->socket.flags = 0; |
471 | skt->ops->set_socket(skt, &skt->socket); | |
472 | ||
473 | /* | |
474 | * Wait "vcc_settle" for the supply to stabilise. | |
475 | */ | |
476 | msleep(vcc_settle * 10); | |
477 | ||
478 | skt->ops->get_status(skt, &status); | |
479 | if (!(status & SS_POWERON)) { | |
d50dbec3 | 480 | dev_printk(KERN_ERR, &skt->dev, "unable to apply power.\n"); |
610e2374 | 481 | return -EIO; |
1da177e4 LT |
482 | } |
483 | ||
fa912bcb DR |
484 | status = socket_reset(skt); |
485 | ||
486 | if (skt->power_hook) | |
487 | skt->power_hook(skt, HOOK_POWER_POST); | |
488 | ||
489 | return status; | |
1da177e4 LT |
490 | } |
491 | ||
492 | /* | |
493 | * Handle card insertion. Setup the socket, reset the card, | |
494 | * and then tell the rest of PCMCIA that a card is present. | |
495 | */ | |
496 | static int socket_insert(struct pcmcia_socket *skt) | |
497 | { | |
498 | int ret; | |
499 | ||
d50dbec3 | 500 | dev_dbg(&skt->dev, "insert\n"); |
1da177e4 | 501 | |
9e86749c | 502 | mutex_lock(&skt->ops_mutex); |
3970dd8c DB |
503 | WARN_ON(skt->state & SOCKET_INUSE); |
504 | skt->state |= SOCKET_INUSE; | |
1da177e4 LT |
505 | |
506 | ret = socket_setup(skt, setup_delay); | |
4c89e88b | 507 | if (ret == 0) { |
1da177e4 | 508 | skt->state |= SOCKET_PRESENT; |
807277cb | 509 | |
2e55bf6b DB |
510 | dev_printk(KERN_NOTICE, &skt->dev, |
511 | "pccard: %s card inserted into slot %d\n", | |
512 | (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA", | |
513 | skt->sock); | |
807277cb | 514 | |
1da177e4 LT |
515 | #ifdef CONFIG_CARDBUS |
516 | if (skt->state & SOCKET_CARDBUS) { | |
517 | cb_alloc(skt); | |
518 | skt->state |= SOCKET_CARDBUS_CONFIG; | |
519 | } | |
520 | #endif | |
d50dbec3 | 521 | dev_dbg(&skt->dev, "insert done\n"); |
9e86749c | 522 | mutex_unlock(&skt->ops_mutex); |
1da177e4 LT |
523 | |
524 | send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
525 | } else { | |
9e86749c | 526 | mutex_unlock(&skt->ops_mutex); |
1da177e4 | 527 | socket_shutdown(skt); |
1da177e4 LT |
528 | } |
529 | ||
530 | return ret; | |
531 | } | |
532 | ||
533 | static int socket_suspend(struct pcmcia_socket *skt) | |
534 | { | |
535 | if (skt->state & SOCKET_SUSPEND) | |
f958095e | 536 | return -EBUSY; |
1da177e4 | 537 | |
9e86749c | 538 | mutex_lock(&skt->ops_mutex); |
88b060d6 DB |
539 | skt->suspended_state = skt->state; |
540 | ||
1da177e4 LT |
541 | send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW); |
542 | skt->socket = dead_socket; | |
543 | skt->ops->set_socket(skt, &skt->socket); | |
544 | if (skt->ops->suspend) | |
545 | skt->ops->suspend(skt); | |
546 | skt->state |= SOCKET_SUSPEND; | |
9e86749c | 547 | mutex_unlock(&skt->ops_mutex); |
4c89e88b | 548 | return 0; |
1da177e4 LT |
549 | } |
550 | ||
9905d1b4 | 551 | static int socket_early_resume(struct pcmcia_socket *skt) |
1da177e4 | 552 | { |
9e86749c | 553 | mutex_lock(&skt->ops_mutex); |
1da177e4 LT |
554 | skt->socket = dead_socket; |
555 | skt->ops->init(skt); | |
556 | skt->ops->set_socket(skt, &skt->socket); | |
9905d1b4 RW |
557 | if (skt->state & SOCKET_PRESENT) |
558 | skt->resume_status = socket_setup(skt, resume_delay); | |
9e86749c | 559 | mutex_unlock(&skt->ops_mutex); |
9905d1b4 RW |
560 | return 0; |
561 | } | |
1da177e4 | 562 | |
9905d1b4 RW |
563 | static int socket_late_resume(struct pcmcia_socket *skt) |
564 | { | |
9e86749c | 565 | mutex_lock(&skt->ops_mutex); |
88b060d6 | 566 | skt->state &= ~SOCKET_SUSPEND; |
9e86749c | 567 | mutex_unlock(&skt->ops_mutex); |
88b060d6 DB |
568 | |
569 | if (!(skt->state & SOCKET_PRESENT)) | |
1da177e4 | 570 | return socket_insert(skt); |
88b060d6 DB |
571 | |
572 | if (skt->resume_status) { | |
573 | socket_shutdown(skt); | |
574 | return 0; | |
1da177e4 LT |
575 | } |
576 | ||
88b060d6 DB |
577 | if (skt->suspended_state != skt->state) { |
578 | dev_dbg(&skt->dev, | |
579 | "suspend state 0x%x != resume state 0x%x\n", | |
580 | skt->suspended_state, skt->state); | |
581 | ||
1da177e4 | 582 | socket_shutdown(skt); |
88b060d6 | 583 | return socket_insert(skt); |
1da177e4 LT |
584 | } |
585 | ||
88b060d6 DB |
586 | #ifdef CONFIG_CARDBUS |
587 | if (skt->state & SOCKET_CARDBUS) { | |
588 | /* We can't be sure the CardBus card is the same | |
589 | * as the one previously inserted. Therefore, remove | |
590 | * and re-add... */ | |
591 | cb_free(skt); | |
592 | cb_alloc(skt); | |
593 | return 0; | |
594 | } | |
595 | #endif | |
1da177e4 | 596 | |
88b060d6 | 597 | send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW); |
4c89e88b | 598 | return 0; |
1da177e4 LT |
599 | } |
600 | ||
9905d1b4 RW |
601 | /* |
602 | * Resume a socket. If a card is present, verify its CIS against | |
603 | * our cached copy. If they are different, the card has been | |
604 | * replaced, and we need to tell the drivers. | |
605 | */ | |
606 | static int socket_resume(struct pcmcia_socket *skt) | |
607 | { | |
608 | if (!(skt->state & SOCKET_SUSPEND)) | |
609 | return -EBUSY; | |
610 | ||
611 | socket_early_resume(skt); | |
612 | return socket_late_resume(skt); | |
613 | } | |
614 | ||
1da177e4 LT |
615 | static void socket_remove(struct pcmcia_socket *skt) |
616 | { | |
2e55bf6b DB |
617 | dev_printk(KERN_NOTICE, &skt->dev, |
618 | "pccard: card ejected from slot %d\n", skt->sock); | |
1da177e4 | 619 | socket_shutdown(skt); |
1da177e4 LT |
620 | } |
621 | ||
622 | /* | |
623 | * Process a socket card detect status change. | |
624 | * | |
625 | * If we don't have a card already present, delay the detect event for | |
626 | * about 20ms (to be on the safe side) before reading the socket status. | |
627 | * | |
628 | * Some i82365-based systems send multiple SS_DETECT events during card | |
629 | * insertion, and the "card present" status bit seems to bounce. This | |
630 | * will probably be true with GPIO-based card detection systems after | |
631 | * the product has aged. | |
632 | */ | |
633 | static void socket_detect_change(struct pcmcia_socket *skt) | |
634 | { | |
635 | if (!(skt->state & SOCKET_SUSPEND)) { | |
636 | int status; | |
637 | ||
638 | if (!(skt->state & SOCKET_PRESENT)) | |
639 | msleep(20); | |
640 | ||
641 | skt->ops->get_status(skt, &status); | |
642 | if ((skt->state & SOCKET_PRESENT) && | |
643 | !(status & SS_DETECT)) | |
644 | socket_remove(skt); | |
645 | if (!(skt->state & SOCKET_PRESENT) && | |
646 | (status & SS_DETECT)) | |
647 | socket_insert(skt); | |
648 | } | |
649 | } | |
650 | ||
651 | static int pccardd(void *__skt) | |
652 | { | |
653 | struct pcmcia_socket *skt = __skt; | |
1da177e4 LT |
654 | int ret; |
655 | ||
1da177e4 LT |
656 | skt->thread = current; |
657 | skt->socket = dead_socket; | |
658 | skt->ops->init(skt); | |
659 | skt->ops->set_socket(skt, &skt->socket); | |
660 | ||
661 | /* register with the device core */ | |
87373318 | 662 | ret = device_register(&skt->dev); |
1da177e4 | 663 | if (ret) { |
2e55bf6b DB |
664 | dev_printk(KERN_WARNING, &skt->dev, |
665 | "PCMCIA: unable to register socket\n"); | |
1da177e4 | 666 | skt->thread = NULL; |
1da9ab73 SH |
667 | complete(&skt->thread_done); |
668 | return 0; | |
1da177e4 | 669 | } |
4356d73d DB |
670 | ret = pccard_sysfs_add_socket(&skt->dev); |
671 | if (ret) | |
672 | dev_warn(&skt->dev, "err %d adding socket attributes\n", ret); | |
1da177e4 | 673 | |
bf4de6f2 DR |
674 | complete(&skt->thread_done); |
675 | ||
83144186 | 676 | set_freezable(); |
1da177e4 LT |
677 | for (;;) { |
678 | unsigned long flags; | |
679 | unsigned int events; | |
680 | ||
681 | set_current_state(TASK_INTERRUPTIBLE); | |
682 | ||
683 | spin_lock_irqsave(&skt->thread_lock, flags); | |
684 | events = skt->thread_events; | |
685 | skt->thread_events = 0; | |
686 | spin_unlock_irqrestore(&skt->thread_lock, flags); | |
687 | ||
688 | if (events) { | |
7fe908dd | 689 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
690 | if (events & SS_DETECT) |
691 | socket_detect_change(skt); | |
692 | if (events & SS_BATDEAD) | |
693 | send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW); | |
694 | if (events & SS_BATWARN) | |
695 | send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW); | |
696 | if (events & SS_READY) | |
697 | send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW); | |
7fe908dd | 698 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
699 | continue; |
700 | } | |
701 | ||
1da9ab73 | 702 | if (kthread_should_stop()) |
1da177e4 | 703 | break; |
bf4de6f2 DR |
704 | |
705 | schedule(); | |
706 | try_to_freeze(); | |
1da177e4 | 707 | } |
220ec029 SR |
708 | /* make sure we are running before we exit */ |
709 | set_current_state(TASK_RUNNING); | |
710 | ||
3970dd8c DB |
711 | /* shut down socket, if a device is still present */ |
712 | if (skt->state & SOCKET_PRESENT) { | |
713 | mutex_lock(&skt->skt_mutex); | |
714 | socket_remove(skt); | |
715 | mutex_unlock(&skt->skt_mutex); | |
716 | } | |
717 | ||
1da177e4 | 718 | /* remove from the device core */ |
4356d73d | 719 | pccard_sysfs_remove_socket(&skt->dev); |
87373318 | 720 | device_unregister(&skt->dev); |
1da177e4 | 721 | |
1da9ab73 | 722 | return 0; |
1da177e4 LT |
723 | } |
724 | ||
725 | /* | |
726 | * Yenta (at least) probes interrupts before registering the socket and | |
727 | * starting the handler thread. | |
728 | */ | |
729 | void pcmcia_parse_events(struct pcmcia_socket *s, u_int events) | |
730 | { | |
4b7a89a3 | 731 | unsigned long flags; |
d50dbec3 | 732 | dev_dbg(&s->dev, "parse_events: events %08x\n", events); |
1da177e4 | 733 | if (s->thread) { |
4b7a89a3 | 734 | spin_lock_irqsave(&s->thread_lock, flags); |
1da177e4 | 735 | s->thread_events |= events; |
4b7a89a3 | 736 | spin_unlock_irqrestore(&s->thread_lock, flags); |
1da177e4 | 737 | |
0b402094 | 738 | wake_up_process(s->thread); |
1da177e4 LT |
739 | } |
740 | } /* pcmcia_parse_events */ | |
33519ddd | 741 | EXPORT_SYMBOL(pcmcia_parse_events); |
1da177e4 | 742 | |
1da177e4 LT |
743 | |
744 | /* register pcmcia_callback */ | |
745 | int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c) | |
746 | { | |
9fea84f4 | 747 | int ret = 0; |
1da177e4 | 748 | |
7fe908dd DB |
749 | /* s->skt_mutex also protects s->callback */ |
750 | mutex_lock(&s->skt_mutex); | |
1da177e4 LT |
751 | |
752 | if (c) { | |
753 | /* registration */ | |
754 | if (s->callback) { | |
755 | ret = -EBUSY; | |
756 | goto err; | |
757 | } | |
758 | ||
759 | s->callback = c; | |
760 | ||
761 | if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) | |
762 | send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
763 | } else | |
764 | s->callback = NULL; | |
765 | err: | |
7fe908dd | 766 | mutex_unlock(&s->skt_mutex); |
1da177e4 LT |
767 | |
768 | return ret; | |
769 | } | |
770 | EXPORT_SYMBOL(pccard_register_pcmcia); | |
771 | ||
1da177e4 | 772 | |
33519ddd DB |
773 | /* I'm not sure which "reset" function this is supposed to use, |
774 | * but for now, it uses the low-level interface's reset, not the | |
775 | * CIS register. | |
776 | */ | |
1da177e4 | 777 | |
994917f8 | 778 | int pcmcia_reset_card(struct pcmcia_socket *skt) |
1da177e4 LT |
779 | { |
780 | int ret; | |
33519ddd | 781 | |
d50dbec3 | 782 | dev_dbg(&skt->dev, "resetting socket\n"); |
1da177e4 | 783 | |
7fe908dd | 784 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
785 | do { |
786 | if (!(skt->state & SOCKET_PRESENT)) { | |
6d9a299f | 787 | dev_dbg(&skt->dev, "can't reset, not present\n"); |
3939c1ef | 788 | ret = -ENODEV; |
1da177e4 LT |
789 | break; |
790 | } | |
791 | if (skt->state & SOCKET_SUSPEND) { | |
6d9a299f | 792 | dev_dbg(&skt->dev, "can't reset, suspended\n"); |
f958095e | 793 | ret = -EBUSY; |
1da177e4 LT |
794 | break; |
795 | } | |
796 | if (skt->state & SOCKET_CARDBUS) { | |
6d9a299f | 797 | dev_dbg(&skt->dev, "can't reset, is cardbus\n"); |
de6405e9 | 798 | ret = -EPERM; |
1da177e4 LT |
799 | break; |
800 | } | |
801 | ||
802 | ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW); | |
803 | if (ret == 0) { | |
804 | send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW); | |
8e9e793d DB |
805 | if (skt->callback) |
806 | skt->callback->suspend(skt); | |
9e86749c DB |
807 | mutex_lock(&skt->ops_mutex); |
808 | ret = socket_reset(skt); | |
809 | mutex_unlock(&skt->ops_mutex); | |
810 | if (ret == 0) { | |
1da177e4 | 811 | send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW); |
8e9e793d DB |
812 | if (skt->callback) |
813 | skt->callback->resume(skt); | |
814 | } | |
1da177e4 LT |
815 | } |
816 | ||
4c89e88b | 817 | ret = 0; |
1da177e4 | 818 | } while (0); |
7fe908dd | 819 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
820 | |
821 | return ret; | |
822 | } /* reset_card */ | |
994917f8 | 823 | EXPORT_SYMBOL(pcmcia_reset_card); |
1da177e4 | 824 | |
1da177e4 | 825 | |
33519ddd DB |
826 | /* These shut down or wake up a socket. They are sort of user |
827 | * initiated versions of the APM suspend and resume actions. | |
828 | */ | |
1da177e4 LT |
829 | int pcmcia_suspend_card(struct pcmcia_socket *skt) |
830 | { | |
831 | int ret; | |
33519ddd | 832 | |
d50dbec3 | 833 | dev_dbg(&skt->dev, "suspending socket\n"); |
1da177e4 | 834 | |
7fe908dd | 835 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
836 | do { |
837 | if (!(skt->state & SOCKET_PRESENT)) { | |
3939c1ef | 838 | ret = -ENODEV; |
1da177e4 LT |
839 | break; |
840 | } | |
841 | if (skt->state & SOCKET_CARDBUS) { | |
de6405e9 | 842 | ret = -EPERM; |
1da177e4 LT |
843 | break; |
844 | } | |
8e9e793d DB |
845 | if (skt->callback) { |
846 | ret = skt->callback->suspend(skt); | |
847 | if (ret) | |
848 | break; | |
849 | } | |
1da177e4 LT |
850 | ret = socket_suspend(skt); |
851 | } while (0); | |
7fe908dd | 852 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
853 | |
854 | return ret; | |
855 | } /* suspend_card */ | |
33519ddd DB |
856 | EXPORT_SYMBOL(pcmcia_suspend_card); |
857 | ||
1da177e4 LT |
858 | |
859 | int pcmcia_resume_card(struct pcmcia_socket *skt) | |
860 | { | |
861 | int ret; | |
9fea84f4 | 862 | |
d50dbec3 | 863 | dev_dbg(&skt->dev, "waking up socket\n"); |
1da177e4 | 864 | |
7fe908dd | 865 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
866 | do { |
867 | if (!(skt->state & SOCKET_PRESENT)) { | |
3939c1ef | 868 | ret = -ENODEV; |
1da177e4 LT |
869 | break; |
870 | } | |
871 | if (skt->state & SOCKET_CARDBUS) { | |
de6405e9 | 872 | ret = -EPERM; |
1da177e4 LT |
873 | break; |
874 | } | |
875 | ret = socket_resume(skt); | |
8e9e793d DB |
876 | if (!ret && skt->callback) |
877 | skt->callback->resume(skt); | |
1da177e4 | 878 | } while (0); |
7fe908dd | 879 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
880 | |
881 | return ret; | |
882 | } /* resume_card */ | |
33519ddd | 883 | EXPORT_SYMBOL(pcmcia_resume_card); |
1da177e4 | 884 | |
1da177e4 | 885 | |
33519ddd | 886 | /* These handle user requests to eject or insert a card. */ |
1da177e4 LT |
887 | int pcmcia_eject_card(struct pcmcia_socket *skt) |
888 | { | |
889 | int ret; | |
9fea84f4 | 890 | |
d50dbec3 | 891 | dev_dbg(&skt->dev, "user eject request\n"); |
1da177e4 | 892 | |
7fe908dd | 893 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
894 | do { |
895 | if (!(skt->state & SOCKET_PRESENT)) { | |
896 | ret = -ENODEV; | |
897 | break; | |
898 | } | |
899 | ||
900 | ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW); | |
901 | if (ret != 0) { | |
902 | ret = -EINVAL; | |
903 | break; | |
904 | } | |
905 | ||
906 | socket_remove(skt); | |
907 | ret = 0; | |
908 | } while (0); | |
7fe908dd | 909 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
910 | |
911 | return ret; | |
912 | } /* eject_card */ | |
33519ddd DB |
913 | EXPORT_SYMBOL(pcmcia_eject_card); |
914 | ||
1da177e4 LT |
915 | |
916 | int pcmcia_insert_card(struct pcmcia_socket *skt) | |
917 | { | |
918 | int ret; | |
919 | ||
d50dbec3 | 920 | dev_dbg(&skt->dev, "user insert request\n"); |
1da177e4 | 921 | |
7fe908dd | 922 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
923 | do { |
924 | if (skt->state & SOCKET_PRESENT) { | |
925 | ret = -EBUSY; | |
926 | break; | |
927 | } | |
3939c1ef | 928 | if (socket_insert(skt) == -ENODEV) { |
1da177e4 LT |
929 | ret = -ENODEV; |
930 | break; | |
931 | } | |
932 | ret = 0; | |
933 | } while (0); | |
7fe908dd | 934 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
935 | |
936 | return ret; | |
937 | } /* insert_card */ | |
33519ddd DB |
938 | EXPORT_SYMBOL(pcmcia_insert_card); |
939 | ||
1da177e4 | 940 | |
7eff2e7a KS |
941 | static int pcmcia_socket_uevent(struct device *dev, |
942 | struct kobj_uevent_env *env) | |
3ee13937 DB |
943 | { |
944 | struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); | |
3ee13937 | 945 | |
7eff2e7a | 946 | if (add_uevent_var(env, "SOCKET_NO=%u", s->sock)) |
3ee13937 DB |
947 | return -ENOMEM; |
948 | ||
3ee13937 DB |
949 | return 0; |
950 | } | |
951 | ||
1da177e4 | 952 | |
378a33a6 DB |
953 | static struct completion pcmcia_unload; |
954 | ||
955 | static void pcmcia_release_socket_class(struct class *data) | |
956 | { | |
957 | complete(&pcmcia_unload); | |
958 | } | |
959 | ||
960 | ||
1da177e4 LT |
961 | struct class pcmcia_socket_class = { |
962 | .name = "pcmcia_socket", | |
87373318 GKH |
963 | .dev_uevent = pcmcia_socket_uevent, |
964 | .dev_release = pcmcia_release_socket, | |
378a33a6 | 965 | .class_release = pcmcia_release_socket_class, |
1da177e4 LT |
966 | }; |
967 | EXPORT_SYMBOL(pcmcia_socket_class); | |
968 | ||
969 | ||
970 | static int __init init_pcmcia_cs(void) | |
971 | { | |
378a33a6 | 972 | init_completion(&pcmcia_unload); |
4356d73d | 973 | return class_register(&pcmcia_socket_class); |
1da177e4 LT |
974 | } |
975 | ||
976 | static void __exit exit_pcmcia_cs(void) | |
977 | { | |
33519ddd | 978 | class_unregister(&pcmcia_socket_class); |
378a33a6 | 979 | wait_for_completion(&pcmcia_unload); |
1da177e4 LT |
980 | } |
981 | ||
982 | subsys_initcall(init_pcmcia_cs); | |
983 | module_exit(exit_pcmcia_cs); | |
984 |