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Commit | Line | Data |
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baf8532a AD |
1 | /* |
2 | * Sony MemoryStick support | |
3 | * | |
4 | * Copyright (C) 2007 Alex Dubov <oakad@yahoo.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * Special thanks to Carlos Corbacho for providing various MemoryStick cards | |
11 | * that made this driver possible. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include <linux/memstick.h> | |
16 | #include <linux/idr.h> | |
17 | #include <linux/fs.h> | |
18 | #include <linux/delay.h> | |
5a0e3ad6 | 19 | #include <linux/slab.h> |
baf8532a AD |
20 | |
21 | #define DRIVER_NAME "memstick" | |
baf8532a AD |
22 | |
23 | static unsigned int cmd_retries = 3; | |
24 | module_param(cmd_retries, uint, 0644); | |
25 | ||
26 | static struct workqueue_struct *workqueue; | |
27 | static DEFINE_IDR(memstick_host_idr); | |
28 | static DEFINE_SPINLOCK(memstick_host_lock); | |
29 | ||
30 | static int memstick_dev_match(struct memstick_dev *card, | |
31 | struct memstick_device_id *id) | |
32 | { | |
33 | if (id->match_flags & MEMSTICK_MATCH_ALL) { | |
34 | if ((id->type == card->id.type) | |
35 | && (id->category == card->id.category) | |
36 | && (id->class == card->id.class)) | |
37 | return 1; | |
38 | } | |
39 | ||
40 | return 0; | |
41 | } | |
42 | ||
43 | static int memstick_bus_match(struct device *dev, struct device_driver *drv) | |
44 | { | |
45 | struct memstick_dev *card = container_of(dev, struct memstick_dev, | |
46 | dev); | |
47 | struct memstick_driver *ms_drv = container_of(drv, | |
48 | struct memstick_driver, | |
49 | driver); | |
50 | struct memstick_device_id *ids = ms_drv->id_table; | |
51 | ||
52 | if (ids) { | |
53 | while (ids->match_flags) { | |
54 | if (memstick_dev_match(card, ids)) | |
55 | return 1; | |
56 | ++ids; | |
57 | } | |
58 | } | |
59 | return 0; | |
60 | } | |
61 | ||
62 | static int memstick_uevent(struct device *dev, struct kobj_uevent_env *env) | |
63 | { | |
64 | struct memstick_dev *card = container_of(dev, struct memstick_dev, | |
65 | dev); | |
66 | ||
67 | if (add_uevent_var(env, "MEMSTICK_TYPE=%02X", card->id.type)) | |
68 | return -ENOMEM; | |
69 | ||
70 | if (add_uevent_var(env, "MEMSTICK_CATEGORY=%02X", card->id.category)) | |
71 | return -ENOMEM; | |
72 | ||
73 | if (add_uevent_var(env, "MEMSTICK_CLASS=%02X", card->id.class)) | |
74 | return -ENOMEM; | |
75 | ||
76 | return 0; | |
77 | } | |
78 | ||
79 | static int memstick_device_probe(struct device *dev) | |
80 | { | |
81 | struct memstick_dev *card = container_of(dev, struct memstick_dev, | |
82 | dev); | |
83 | struct memstick_driver *drv = container_of(dev->driver, | |
84 | struct memstick_driver, | |
85 | driver); | |
86 | int rc = -ENODEV; | |
87 | ||
88 | if (dev->driver && drv->probe) { | |
89 | rc = drv->probe(card); | |
90 | if (!rc) | |
91 | get_device(dev); | |
92 | } | |
93 | return rc; | |
94 | } | |
95 | ||
96 | static int memstick_device_remove(struct device *dev) | |
97 | { | |
98 | struct memstick_dev *card = container_of(dev, struct memstick_dev, | |
99 | dev); | |
100 | struct memstick_driver *drv = container_of(dev->driver, | |
101 | struct memstick_driver, | |
102 | driver); | |
103 | ||
104 | if (dev->driver && drv->remove) { | |
105 | drv->remove(card); | |
106 | card->dev.driver = NULL; | |
107 | } | |
108 | ||
109 | put_device(dev); | |
110 | return 0; | |
111 | } | |
112 | ||
113 | #ifdef CONFIG_PM | |
114 | ||
115 | static int memstick_device_suspend(struct device *dev, pm_message_t state) | |
116 | { | |
117 | struct memstick_dev *card = container_of(dev, struct memstick_dev, | |
118 | dev); | |
119 | struct memstick_driver *drv = container_of(dev->driver, | |
120 | struct memstick_driver, | |
121 | driver); | |
122 | ||
123 | if (dev->driver && drv->suspend) | |
124 | return drv->suspend(card, state); | |
125 | return 0; | |
126 | } | |
127 | ||
128 | static int memstick_device_resume(struct device *dev) | |
129 | { | |
130 | struct memstick_dev *card = container_of(dev, struct memstick_dev, | |
131 | dev); | |
132 | struct memstick_driver *drv = container_of(dev->driver, | |
133 | struct memstick_driver, | |
134 | driver); | |
135 | ||
136 | if (dev->driver && drv->resume) | |
137 | return drv->resume(card); | |
138 | return 0; | |
139 | } | |
140 | ||
141 | #else | |
142 | ||
143 | #define memstick_device_suspend NULL | |
144 | #define memstick_device_resume NULL | |
145 | ||
146 | #endif /* CONFIG_PM */ | |
147 | ||
148 | #define MEMSTICK_ATTR(name, format) \ | |
149 | static ssize_t name##_show(struct device *dev, struct device_attribute *attr, \ | |
150 | char *buf) \ | |
151 | { \ | |
152 | struct memstick_dev *card = container_of(dev, struct memstick_dev, \ | |
153 | dev); \ | |
154 | return sprintf(buf, format, card->id.name); \ | |
155 | } | |
156 | ||
157 | MEMSTICK_ATTR(type, "%02X"); | |
158 | MEMSTICK_ATTR(category, "%02X"); | |
159 | MEMSTICK_ATTR(class, "%02X"); | |
160 | ||
161 | #define MEMSTICK_ATTR_RO(name) __ATTR(name, S_IRUGO, name##_show, NULL) | |
162 | ||
163 | static struct device_attribute memstick_dev_attrs[] = { | |
164 | MEMSTICK_ATTR_RO(type), | |
165 | MEMSTICK_ATTR_RO(category), | |
166 | MEMSTICK_ATTR_RO(class), | |
167 | __ATTR_NULL | |
168 | }; | |
169 | ||
170 | static struct bus_type memstick_bus_type = { | |
171 | .name = "memstick", | |
172 | .dev_attrs = memstick_dev_attrs, | |
173 | .match = memstick_bus_match, | |
174 | .uevent = memstick_uevent, | |
175 | .probe = memstick_device_probe, | |
176 | .remove = memstick_device_remove, | |
177 | .suspend = memstick_device_suspend, | |
178 | .resume = memstick_device_resume | |
179 | }; | |
180 | ||
c4c66cf1 | 181 | static void memstick_free(struct device *dev) |
baf8532a | 182 | { |
c4c66cf1 GKH |
183 | struct memstick_host *host = container_of(dev, struct memstick_host, |
184 | dev); | |
baf8532a AD |
185 | kfree(host); |
186 | } | |
187 | ||
188 | static struct class memstick_host_class = { | |
8e82f8c3 | 189 | .name = "memstick_host", |
c4c66cf1 | 190 | .dev_release = memstick_free |
baf8532a AD |
191 | }; |
192 | ||
193 | static void memstick_free_card(struct device *dev) | |
194 | { | |
195 | struct memstick_dev *card = container_of(dev, struct memstick_dev, | |
196 | dev); | |
197 | kfree(card); | |
198 | } | |
199 | ||
200 | static int memstick_dummy_check(struct memstick_dev *card) | |
201 | { | |
202 | return 0; | |
203 | } | |
204 | ||
205 | /** | |
206 | * memstick_detect_change - schedule media detection on memstick host | |
207 | * @host - host to use | |
208 | */ | |
209 | void memstick_detect_change(struct memstick_host *host) | |
210 | { | |
211 | queue_work(workqueue, &host->media_checker); | |
212 | } | |
213 | EXPORT_SYMBOL(memstick_detect_change); | |
214 | ||
215 | /** | |
216 | * memstick_next_req - called by host driver to obtain next request to process | |
217 | * @host - host to use | |
218 | * @mrq - pointer to stick the request to | |
219 | * | |
220 | * Host calls this function from idle state (*mrq == NULL) or after finishing | |
221 | * previous request (*mrq should point to it). If previous request was | |
222 | * unsuccessful, it is retried for predetermined number of times. Return value | |
223 | * of 0 means that new request was assigned to the host. | |
224 | */ | |
225 | int memstick_next_req(struct memstick_host *host, struct memstick_request **mrq) | |
226 | { | |
227 | int rc = -ENXIO; | |
228 | ||
229 | if ((*mrq) && (*mrq)->error && host->retries) { | |
230 | (*mrq)->error = rc; | |
231 | host->retries--; | |
232 | return 0; | |
233 | } | |
234 | ||
235 | if (host->card && host->card->next_request) | |
236 | rc = host->card->next_request(host->card, mrq); | |
237 | ||
238 | if (!rc) | |
29196dc6 | 239 | host->retries = cmd_retries > 1 ? cmd_retries - 1 : 1; |
baf8532a AD |
240 | else |
241 | *mrq = NULL; | |
242 | ||
243 | return rc; | |
244 | } | |
245 | EXPORT_SYMBOL(memstick_next_req); | |
246 | ||
247 | /** | |
248 | * memstick_new_req - notify the host that some requests are pending | |
249 | * @host - host to use | |
250 | */ | |
251 | void memstick_new_req(struct memstick_host *host) | |
252 | { | |
f1d82698 AD |
253 | if (host->card) { |
254 | host->retries = cmd_retries; | |
255 | INIT_COMPLETION(host->card->mrq_complete); | |
256 | host->request(host); | |
257 | } | |
baf8532a AD |
258 | } |
259 | EXPORT_SYMBOL(memstick_new_req); | |
260 | ||
261 | /** | |
262 | * memstick_init_req_sg - set request fields needed for bulk data transfer | |
263 | * @mrq - request to use | |
264 | * @tpc - memstick Transport Protocol Command | |
265 | * @sg - TPC argument | |
266 | */ | |
267 | void memstick_init_req_sg(struct memstick_request *mrq, unsigned char tpc, | |
8e82f8c3 | 268 | const struct scatterlist *sg) |
baf8532a AD |
269 | { |
270 | mrq->tpc = tpc; | |
271 | if (tpc & 8) | |
272 | mrq->data_dir = WRITE; | |
273 | else | |
274 | mrq->data_dir = READ; | |
275 | ||
276 | mrq->sg = *sg; | |
e1f19995 | 277 | mrq->long_data = 1; |
baf8532a AD |
278 | |
279 | if (tpc == MS_TPC_SET_CMD || tpc == MS_TPC_EX_SET_CMD) | |
280 | mrq->need_card_int = 1; | |
281 | else | |
282 | mrq->need_card_int = 0; | |
baf8532a AD |
283 | } |
284 | EXPORT_SYMBOL(memstick_init_req_sg); | |
285 | ||
286 | /** | |
287 | * memstick_init_req - set request fields needed for short data transfer | |
288 | * @mrq - request to use | |
289 | * @tpc - memstick Transport Protocol Command | |
290 | * @buf - TPC argument buffer | |
291 | * @length - TPC argument size | |
292 | * | |
293 | * The intended use of this function (transfer of data items several bytes | |
294 | * in size) allows us to just copy the value between request structure and | |
295 | * user supplied buffer. | |
296 | */ | |
297 | void memstick_init_req(struct memstick_request *mrq, unsigned char tpc, | |
8e82f8c3 | 298 | const void *buf, size_t length) |
baf8532a AD |
299 | { |
300 | mrq->tpc = tpc; | |
301 | if (tpc & 8) | |
302 | mrq->data_dir = WRITE; | |
303 | else | |
304 | mrq->data_dir = READ; | |
305 | ||
306 | mrq->data_len = length > sizeof(mrq->data) ? sizeof(mrq->data) : length; | |
307 | if (mrq->data_dir == WRITE) | |
308 | memcpy(mrq->data, buf, mrq->data_len); | |
309 | ||
e1f19995 | 310 | mrq->long_data = 0; |
baf8532a AD |
311 | |
312 | if (tpc == MS_TPC_SET_CMD || tpc == MS_TPC_EX_SET_CMD) | |
313 | mrq->need_card_int = 1; | |
314 | else | |
315 | mrq->need_card_int = 0; | |
baf8532a AD |
316 | } |
317 | EXPORT_SYMBOL(memstick_init_req); | |
318 | ||
319 | /* | |
320 | * Functions prefixed with "h_" are protocol callbacks. They can be called from | |
321 | * interrupt context. Return value of 0 means that request processing is still | |
322 | * ongoing, while special error value of -EAGAIN means that current request is | |
323 | * finished (and request processor should come back some time later). | |
324 | */ | |
325 | ||
326 | static int h_memstick_read_dev_id(struct memstick_dev *card, | |
327 | struct memstick_request **mrq) | |
328 | { | |
329 | struct ms_id_register id_reg; | |
330 | ||
331 | if (!(*mrq)) { | |
332 | memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, NULL, | |
333 | sizeof(struct ms_id_register)); | |
334 | *mrq = &card->current_mrq; | |
335 | return 0; | |
336 | } else { | |
337 | if (!(*mrq)->error) { | |
338 | memcpy(&id_reg, (*mrq)->data, sizeof(id_reg)); | |
339 | card->id.match_flags = MEMSTICK_MATCH_ALL; | |
340 | card->id.type = id_reg.type; | |
341 | card->id.category = id_reg.category; | |
342 | card->id.class = id_reg.class; | |
b873c2f3 | 343 | dev_dbg(&card->dev, "if_mode = %02x\n", id_reg.if_mode); |
baf8532a AD |
344 | } |
345 | complete(&card->mrq_complete); | |
346 | return -EAGAIN; | |
347 | } | |
348 | } | |
349 | ||
350 | static int h_memstick_set_rw_addr(struct memstick_dev *card, | |
351 | struct memstick_request **mrq) | |
352 | { | |
353 | if (!(*mrq)) { | |
354 | memstick_init_req(&card->current_mrq, MS_TPC_SET_RW_REG_ADRS, | |
355 | (char *)&card->reg_addr, | |
356 | sizeof(card->reg_addr)); | |
357 | *mrq = &card->current_mrq; | |
358 | return 0; | |
359 | } else { | |
360 | complete(&card->mrq_complete); | |
361 | return -EAGAIN; | |
362 | } | |
363 | } | |
364 | ||
365 | /** | |
366 | * memstick_set_rw_addr - issue SET_RW_REG_ADDR request and wait for it to | |
367 | * complete | |
368 | * @card - media device to use | |
369 | */ | |
370 | int memstick_set_rw_addr(struct memstick_dev *card) | |
371 | { | |
372 | card->next_request = h_memstick_set_rw_addr; | |
373 | memstick_new_req(card->host); | |
374 | wait_for_completion(&card->mrq_complete); | |
375 | ||
376 | return card->current_mrq.error; | |
377 | } | |
378 | EXPORT_SYMBOL(memstick_set_rw_addr); | |
379 | ||
380 | static struct memstick_dev *memstick_alloc_card(struct memstick_host *host) | |
381 | { | |
382 | struct memstick_dev *card = kzalloc(sizeof(struct memstick_dev), | |
383 | GFP_KERNEL); | |
384 | struct memstick_dev *old_card = host->card; | |
385 | struct ms_id_register id_reg; | |
386 | ||
387 | if (card) { | |
388 | card->host = host; | |
0252c3b4 | 389 | dev_set_name(&card->dev, "%s", dev_name(&host->dev)); |
c4c66cf1 | 390 | card->dev.parent = &host->dev; |
baf8532a AD |
391 | card->dev.bus = &memstick_bus_type; |
392 | card->dev.release = memstick_free_card; | |
393 | card->check = memstick_dummy_check; | |
394 | ||
395 | card->reg_addr.r_offset = offsetof(struct ms_register, id); | |
396 | card->reg_addr.r_length = sizeof(id_reg); | |
397 | card->reg_addr.w_offset = offsetof(struct ms_register, id); | |
398 | card->reg_addr.w_length = sizeof(id_reg); | |
399 | ||
400 | init_completion(&card->mrq_complete); | |
401 | ||
402 | host->card = card; | |
403 | if (memstick_set_rw_addr(card)) | |
404 | goto err_out; | |
405 | ||
406 | card->next_request = h_memstick_read_dev_id; | |
407 | memstick_new_req(host); | |
408 | wait_for_completion(&card->mrq_complete); | |
409 | ||
410 | if (card->current_mrq.error) | |
411 | goto err_out; | |
412 | } | |
413 | host->card = old_card; | |
414 | return card; | |
415 | err_out: | |
416 | host->card = old_card; | |
417 | kfree(card); | |
418 | return NULL; | |
419 | } | |
420 | ||
b7789998 | 421 | static int memstick_power_on(struct memstick_host *host) |
baf8532a | 422 | { |
b7789998 AD |
423 | int rc = host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON); |
424 | ||
425 | if (!rc) | |
426 | rc = host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL); | |
427 | ||
428 | return rc; | |
baf8532a AD |
429 | } |
430 | ||
431 | static void memstick_check(struct work_struct *work) | |
432 | { | |
433 | struct memstick_host *host = container_of(work, struct memstick_host, | |
434 | media_checker); | |
435 | struct memstick_dev *card; | |
436 | ||
c4c66cf1 | 437 | dev_dbg(&host->dev, "memstick_check started\n"); |
baf8532a | 438 | mutex_lock(&host->lock); |
17017d8d AD |
439 | if (!host->card) { |
440 | if (memstick_power_on(host)) | |
441 | goto out_power_off; | |
8e82f8c3 | 442 | } else if (host->card->stop) |
17017d8d | 443 | host->card->stop(host->card); |
baf8532a AD |
444 | |
445 | card = memstick_alloc_card(host); | |
446 | ||
447 | if (!card) { | |
448 | if (host->card) { | |
449 | device_unregister(&host->card->dev); | |
450 | host->card = NULL; | |
451 | } | |
452 | } else { | |
c4c66cf1 | 453 | dev_dbg(&host->dev, "new card %02x, %02x, %02x\n", |
baf8532a AD |
454 | card->id.type, card->id.category, card->id.class); |
455 | if (host->card) { | |
456 | if (memstick_set_rw_addr(host->card) | |
457 | || !memstick_dev_match(host->card, &card->id) | |
458 | || !(host->card->check(host->card))) { | |
459 | device_unregister(&host->card->dev); | |
460 | host->card = NULL; | |
8e82f8c3 | 461 | } else if (host->card->start) |
17017d8d | 462 | host->card->start(host->card); |
baf8532a AD |
463 | } |
464 | ||
465 | if (!host->card) { | |
466 | host->card = card; | |
467 | if (device_register(&card->dev)) { | |
0193383a | 468 | put_device(&card->dev); |
baf8532a AD |
469 | kfree(host->card); |
470 | host->card = NULL; | |
471 | } | |
472 | } else | |
473 | kfree(card); | |
474 | } | |
475 | ||
17017d8d | 476 | out_power_off: |
baf8532a AD |
477 | if (!host->card) |
478 | host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF); | |
479 | ||
480 | mutex_unlock(&host->lock); | |
c4c66cf1 | 481 | dev_dbg(&host->dev, "memstick_check finished\n"); |
baf8532a AD |
482 | } |
483 | ||
484 | /** | |
485 | * memstick_alloc_host - allocate a memstick_host structure | |
486 | * @extra: size of the user private data to allocate | |
487 | * @dev: parent device of the host | |
488 | */ | |
489 | struct memstick_host *memstick_alloc_host(unsigned int extra, | |
490 | struct device *dev) | |
491 | { | |
492 | struct memstick_host *host; | |
493 | ||
494 | host = kzalloc(sizeof(struct memstick_host) + extra, GFP_KERNEL); | |
495 | if (host) { | |
496 | mutex_init(&host->lock); | |
497 | INIT_WORK(&host->media_checker, memstick_check); | |
c4c66cf1 GKH |
498 | host->dev.class = &memstick_host_class; |
499 | host->dev.parent = dev; | |
500 | device_initialize(&host->dev); | |
baf8532a AD |
501 | } |
502 | return host; | |
503 | } | |
504 | EXPORT_SYMBOL(memstick_alloc_host); | |
505 | ||
506 | /** | |
507 | * memstick_add_host - start request processing on memstick host | |
508 | * @host - host to use | |
509 | */ | |
510 | int memstick_add_host(struct memstick_host *host) | |
511 | { | |
512 | int rc; | |
513 | ||
d8256d48 AD |
514 | while (1) { |
515 | if (!idr_pre_get(&memstick_host_idr, GFP_KERNEL)) | |
516 | return -ENOMEM; | |
baf8532a | 517 | |
d8256d48 AD |
518 | spin_lock(&memstick_host_lock); |
519 | rc = idr_get_new(&memstick_host_idr, host, &host->id); | |
520 | spin_unlock(&memstick_host_lock); | |
521 | if (!rc) | |
522 | break; | |
523 | else if (rc != -EAGAIN) | |
524 | return rc; | |
525 | } | |
baf8532a | 526 | |
0252c3b4 | 527 | dev_set_name(&host->dev, "memstick%u", host->id); |
baf8532a | 528 | |
c4c66cf1 | 529 | rc = device_add(&host->dev); |
baf8532a AD |
530 | if (rc) { |
531 | spin_lock(&memstick_host_lock); | |
532 | idr_remove(&memstick_host_idr, host->id); | |
533 | spin_unlock(&memstick_host_lock); | |
534 | return rc; | |
535 | } | |
536 | ||
537 | host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF); | |
538 | memstick_detect_change(host); | |
539 | return 0; | |
540 | } | |
541 | EXPORT_SYMBOL(memstick_add_host); | |
542 | ||
543 | /** | |
544 | * memstick_remove_host - stop request processing on memstick host | |
545 | * @host - host to use | |
546 | */ | |
547 | void memstick_remove_host(struct memstick_host *host) | |
548 | { | |
549 | flush_workqueue(workqueue); | |
550 | mutex_lock(&host->lock); | |
551 | if (host->card) | |
552 | device_unregister(&host->card->dev); | |
553 | host->card = NULL; | |
554 | host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF); | |
555 | mutex_unlock(&host->lock); | |
556 | ||
557 | spin_lock(&memstick_host_lock); | |
558 | idr_remove(&memstick_host_idr, host->id); | |
559 | spin_unlock(&memstick_host_lock); | |
c4c66cf1 | 560 | device_del(&host->dev); |
baf8532a AD |
561 | } |
562 | EXPORT_SYMBOL(memstick_remove_host); | |
563 | ||
564 | /** | |
565 | * memstick_free_host - free memstick host | |
566 | * @host - host to use | |
567 | */ | |
568 | void memstick_free_host(struct memstick_host *host) | |
569 | { | |
570 | mutex_destroy(&host->lock); | |
c4c66cf1 | 571 | put_device(&host->dev); |
baf8532a AD |
572 | } |
573 | EXPORT_SYMBOL(memstick_free_host); | |
574 | ||
d114ad54 AD |
575 | /** |
576 | * memstick_suspend_host - notify bus driver of host suspension | |
577 | * @host - host to use | |
578 | */ | |
579 | void memstick_suspend_host(struct memstick_host *host) | |
580 | { | |
581 | mutex_lock(&host->lock); | |
582 | host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF); | |
583 | mutex_unlock(&host->lock); | |
584 | } | |
585 | EXPORT_SYMBOL(memstick_suspend_host); | |
586 | ||
587 | /** | |
588 | * memstick_resume_host - notify bus driver of host resumption | |
589 | * @host - host to use | |
590 | */ | |
591 | void memstick_resume_host(struct memstick_host *host) | |
592 | { | |
b7789998 AD |
593 | int rc = 0; |
594 | ||
d114ad54 | 595 | mutex_lock(&host->lock); |
ead70773 | 596 | if (host->card) |
b7789998 | 597 | rc = memstick_power_on(host); |
d114ad54 | 598 | mutex_unlock(&host->lock); |
b7789998 AD |
599 | |
600 | if (!rc) | |
601 | memstick_detect_change(host); | |
d114ad54 AD |
602 | } |
603 | EXPORT_SYMBOL(memstick_resume_host); | |
604 | ||
baf8532a AD |
605 | int memstick_register_driver(struct memstick_driver *drv) |
606 | { | |
607 | drv->driver.bus = &memstick_bus_type; | |
608 | ||
609 | return driver_register(&drv->driver); | |
610 | } | |
611 | EXPORT_SYMBOL(memstick_register_driver); | |
612 | ||
613 | void memstick_unregister_driver(struct memstick_driver *drv) | |
614 | { | |
615 | driver_unregister(&drv->driver); | |
616 | } | |
617 | EXPORT_SYMBOL(memstick_unregister_driver); | |
618 | ||
619 | ||
620 | static int __init memstick_init(void) | |
621 | { | |
622 | int rc; | |
623 | ||
58a69cb4 | 624 | workqueue = create_freezable_workqueue("kmemstick"); |
baf8532a AD |
625 | if (!workqueue) |
626 | return -ENOMEM; | |
627 | ||
628 | rc = bus_register(&memstick_bus_type); | |
629 | if (!rc) | |
630 | rc = class_register(&memstick_host_class); | |
631 | ||
632 | if (!rc) | |
633 | return 0; | |
634 | ||
635 | bus_unregister(&memstick_bus_type); | |
636 | destroy_workqueue(workqueue); | |
637 | ||
638 | return rc; | |
639 | } | |
640 | ||
641 | static void __exit memstick_exit(void) | |
642 | { | |
643 | class_unregister(&memstick_host_class); | |
644 | bus_unregister(&memstick_bus_type); | |
645 | destroy_workqueue(workqueue); | |
646 | idr_destroy(&memstick_host_idr); | |
647 | } | |
648 | ||
649 | module_init(memstick_init); | |
650 | module_exit(memstick_exit); | |
651 | ||
652 | MODULE_AUTHOR("Alex Dubov"); | |
653 | MODULE_LICENSE("GPL"); | |
654 | MODULE_DESCRIPTION("Sony MemoryStick core driver"); |