Commit | Line | Data |
---|---|---|
d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
baf8532a AD |
2 | /* |
3 | * Sony MemoryStick support | |
4 | * | |
5 | * Copyright (C) 2007 Alex Dubov <oakad@yahoo.com> | |
6 | * | |
baf8532a AD |
7 | * Special thanks to Carlos Corbacho for providing various MemoryStick cards |
8 | * that made this driver possible. | |
baf8532a AD |
9 | */ |
10 | ||
11 | #include <linux/memstick.h> | |
12 | #include <linux/idr.h> | |
13 | #include <linux/fs.h> | |
14 | #include <linux/delay.h> | |
5a0e3ad6 | 15 | #include <linux/slab.h> |
c47e7893 | 16 | #include <linux/module.h> |
e03e303e | 17 | #include <linux/pm_runtime.h> |
baf8532a AD |
18 | |
19 | #define DRIVER_NAME "memstick" | |
baf8532a AD |
20 | |
21 | static unsigned int cmd_retries = 3; | |
22 | module_param(cmd_retries, uint, 0644); | |
23 | ||
24 | static struct workqueue_struct *workqueue; | |
25 | static DEFINE_IDR(memstick_host_idr); | |
26 | static DEFINE_SPINLOCK(memstick_host_lock); | |
27 | ||
28 | static int memstick_dev_match(struct memstick_dev *card, | |
29 | struct memstick_device_id *id) | |
30 | { | |
31 | if (id->match_flags & MEMSTICK_MATCH_ALL) { | |
32 | if ((id->type == card->id.type) | |
33 | && (id->category == card->id.category) | |
34 | && (id->class == card->id.class)) | |
35 | return 1; | |
36 | } | |
37 | ||
38 | return 0; | |
39 | } | |
40 | ||
41 | static int memstick_bus_match(struct device *dev, struct device_driver *drv) | |
42 | { | |
43 | struct memstick_dev *card = container_of(dev, struct memstick_dev, | |
44 | dev); | |
45 | struct memstick_driver *ms_drv = container_of(drv, | |
46 | struct memstick_driver, | |
47 | driver); | |
48 | struct memstick_device_id *ids = ms_drv->id_table; | |
49 | ||
50 | if (ids) { | |
51 | while (ids->match_flags) { | |
52 | if (memstick_dev_match(card, ids)) | |
53 | return 1; | |
54 | ++ids; | |
55 | } | |
56 | } | |
57 | return 0; | |
58 | } | |
59 | ||
2a81ada3 | 60 | static int memstick_uevent(const struct device *dev, struct kobj_uevent_env *env) |
baf8532a | 61 | { |
2a81ada3 GKH |
62 | const struct memstick_dev *card = container_of_const(dev, struct memstick_dev, |
63 | dev); | |
baf8532a AD |
64 | |
65 | if (add_uevent_var(env, "MEMSTICK_TYPE=%02X", card->id.type)) | |
66 | return -ENOMEM; | |
67 | ||
68 | if (add_uevent_var(env, "MEMSTICK_CATEGORY=%02X", card->id.category)) | |
69 | return -ENOMEM; | |
70 | ||
71 | if (add_uevent_var(env, "MEMSTICK_CLASS=%02X", card->id.class)) | |
72 | return -ENOMEM; | |
73 | ||
74 | return 0; | |
75 | } | |
76 | ||
77 | static int memstick_device_probe(struct device *dev) | |
78 | { | |
79 | struct memstick_dev *card = container_of(dev, struct memstick_dev, | |
80 | dev); | |
81 | struct memstick_driver *drv = container_of(dev->driver, | |
82 | struct memstick_driver, | |
83 | driver); | |
84 | int rc = -ENODEV; | |
85 | ||
86 | if (dev->driver && drv->probe) { | |
87 | rc = drv->probe(card); | |
88 | if (!rc) | |
89 | get_device(dev); | |
90 | } | |
91 | return rc; | |
92 | } | |
93 | ||
fc7a6209 | 94 | static void memstick_device_remove(struct device *dev) |
baf8532a AD |
95 | { |
96 | struct memstick_dev *card = container_of(dev, struct memstick_dev, | |
97 | dev); | |
98 | struct memstick_driver *drv = container_of(dev->driver, | |
99 | struct memstick_driver, | |
100 | driver); | |
101 | ||
102 | if (dev->driver && drv->remove) { | |
103 | drv->remove(card); | |
104 | card->dev.driver = NULL; | |
105 | } | |
106 | ||
107 | put_device(dev); | |
baf8532a AD |
108 | } |
109 | ||
110 | #ifdef CONFIG_PM | |
111 | ||
112 | static int memstick_device_suspend(struct device *dev, pm_message_t state) | |
113 | { | |
114 | struct memstick_dev *card = container_of(dev, struct memstick_dev, | |
115 | dev); | |
116 | struct memstick_driver *drv = container_of(dev->driver, | |
117 | struct memstick_driver, | |
118 | driver); | |
119 | ||
120 | if (dev->driver && drv->suspend) | |
121 | return drv->suspend(card, state); | |
122 | return 0; | |
123 | } | |
124 | ||
125 | static int memstick_device_resume(struct device *dev) | |
126 | { | |
127 | struct memstick_dev *card = container_of(dev, struct memstick_dev, | |
128 | dev); | |
129 | struct memstick_driver *drv = container_of(dev->driver, | |
130 | struct memstick_driver, | |
131 | driver); | |
132 | ||
133 | if (dev->driver && drv->resume) | |
134 | return drv->resume(card); | |
135 | return 0; | |
136 | } | |
137 | ||
138 | #else | |
139 | ||
140 | #define memstick_device_suspend NULL | |
141 | #define memstick_device_resume NULL | |
142 | ||
143 | #endif /* CONFIG_PM */ | |
144 | ||
145 | #define MEMSTICK_ATTR(name, format) \ | |
146 | static ssize_t name##_show(struct device *dev, struct device_attribute *attr, \ | |
147 | char *buf) \ | |
148 | { \ | |
149 | struct memstick_dev *card = container_of(dev, struct memstick_dev, \ | |
150 | dev); \ | |
151 | return sprintf(buf, format, card->id.name); \ | |
b785464b GKH |
152 | } \ |
153 | static DEVICE_ATTR_RO(name); | |
baf8532a AD |
154 | |
155 | MEMSTICK_ATTR(type, "%02X"); | |
156 | MEMSTICK_ATTR(category, "%02X"); | |
157 | MEMSTICK_ATTR(class, "%02X"); | |
158 | ||
b785464b GKH |
159 | static struct attribute *memstick_dev_attrs[] = { |
160 | &dev_attr_type.attr, | |
161 | &dev_attr_category.attr, | |
162 | &dev_attr_class.attr, | |
163 | NULL, | |
baf8532a | 164 | }; |
b785464b | 165 | ATTRIBUTE_GROUPS(memstick_dev); |
baf8532a AD |
166 | |
167 | static struct bus_type memstick_bus_type = { | |
168 | .name = "memstick", | |
b785464b | 169 | .dev_groups = memstick_dev_groups, |
baf8532a AD |
170 | .match = memstick_bus_match, |
171 | .uevent = memstick_uevent, | |
172 | .probe = memstick_device_probe, | |
173 | .remove = memstick_device_remove, | |
174 | .suspend = memstick_device_suspend, | |
175 | .resume = memstick_device_resume | |
176 | }; | |
177 | ||
c4c66cf1 | 178 | static void memstick_free(struct device *dev) |
baf8532a | 179 | { |
c4c66cf1 GKH |
180 | struct memstick_host *host = container_of(dev, struct memstick_host, |
181 | dev); | |
baf8532a AD |
182 | kfree(host); |
183 | } | |
184 | ||
185 | static struct class memstick_host_class = { | |
8e82f8c3 | 186 | .name = "memstick_host", |
c4c66cf1 | 187 | .dev_release = memstick_free |
baf8532a AD |
188 | }; |
189 | ||
190 | static void memstick_free_card(struct device *dev) | |
191 | { | |
192 | struct memstick_dev *card = container_of(dev, struct memstick_dev, | |
193 | dev); | |
194 | kfree(card); | |
195 | } | |
196 | ||
197 | static int memstick_dummy_check(struct memstick_dev *card) | |
198 | { | |
199 | return 0; | |
200 | } | |
201 | ||
202 | /** | |
203 | * memstick_detect_change - schedule media detection on memstick host | |
204 | * @host - host to use | |
205 | */ | |
206 | void memstick_detect_change(struct memstick_host *host) | |
207 | { | |
208 | queue_work(workqueue, &host->media_checker); | |
209 | } | |
210 | EXPORT_SYMBOL(memstick_detect_change); | |
211 | ||
212 | /** | |
213 | * memstick_next_req - called by host driver to obtain next request to process | |
214 | * @host - host to use | |
215 | * @mrq - pointer to stick the request to | |
216 | * | |
217 | * Host calls this function from idle state (*mrq == NULL) or after finishing | |
218 | * previous request (*mrq should point to it). If previous request was | |
219 | * unsuccessful, it is retried for predetermined number of times. Return value | |
220 | * of 0 means that new request was assigned to the host. | |
221 | */ | |
222 | int memstick_next_req(struct memstick_host *host, struct memstick_request **mrq) | |
223 | { | |
224 | int rc = -ENXIO; | |
225 | ||
226 | if ((*mrq) && (*mrq)->error && host->retries) { | |
227 | (*mrq)->error = rc; | |
228 | host->retries--; | |
229 | return 0; | |
230 | } | |
231 | ||
232 | if (host->card && host->card->next_request) | |
233 | rc = host->card->next_request(host->card, mrq); | |
234 | ||
235 | if (!rc) | |
29196dc6 | 236 | host->retries = cmd_retries > 1 ? cmd_retries - 1 : 1; |
baf8532a AD |
237 | else |
238 | *mrq = NULL; | |
239 | ||
240 | return rc; | |
241 | } | |
242 | EXPORT_SYMBOL(memstick_next_req); | |
243 | ||
244 | /** | |
245 | * memstick_new_req - notify the host that some requests are pending | |
246 | * @host - host to use | |
247 | */ | |
248 | void memstick_new_req(struct memstick_host *host) | |
249 | { | |
f1d82698 AD |
250 | if (host->card) { |
251 | host->retries = cmd_retries; | |
16735d02 | 252 | reinit_completion(&host->card->mrq_complete); |
f1d82698 AD |
253 | host->request(host); |
254 | } | |
baf8532a AD |
255 | } |
256 | EXPORT_SYMBOL(memstick_new_req); | |
257 | ||
258 | /** | |
259 | * memstick_init_req_sg - set request fields needed for bulk data transfer | |
260 | * @mrq - request to use | |
261 | * @tpc - memstick Transport Protocol Command | |
262 | * @sg - TPC argument | |
263 | */ | |
264 | void memstick_init_req_sg(struct memstick_request *mrq, unsigned char tpc, | |
8e82f8c3 | 265 | const struct scatterlist *sg) |
baf8532a AD |
266 | { |
267 | mrq->tpc = tpc; | |
268 | if (tpc & 8) | |
269 | mrq->data_dir = WRITE; | |
270 | else | |
271 | mrq->data_dir = READ; | |
272 | ||
273 | mrq->sg = *sg; | |
e1f19995 | 274 | mrq->long_data = 1; |
baf8532a AD |
275 | |
276 | if (tpc == MS_TPC_SET_CMD || tpc == MS_TPC_EX_SET_CMD) | |
277 | mrq->need_card_int = 1; | |
278 | else | |
279 | mrq->need_card_int = 0; | |
baf8532a AD |
280 | } |
281 | EXPORT_SYMBOL(memstick_init_req_sg); | |
282 | ||
283 | /** | |
284 | * memstick_init_req - set request fields needed for short data transfer | |
285 | * @mrq - request to use | |
286 | * @tpc - memstick Transport Protocol Command | |
287 | * @buf - TPC argument buffer | |
288 | * @length - TPC argument size | |
289 | * | |
290 | * The intended use of this function (transfer of data items several bytes | |
291 | * in size) allows us to just copy the value between request structure and | |
292 | * user supplied buffer. | |
293 | */ | |
294 | void memstick_init_req(struct memstick_request *mrq, unsigned char tpc, | |
8e82f8c3 | 295 | const void *buf, size_t length) |
baf8532a AD |
296 | { |
297 | mrq->tpc = tpc; | |
298 | if (tpc & 8) | |
299 | mrq->data_dir = WRITE; | |
300 | else | |
301 | mrq->data_dir = READ; | |
302 | ||
303 | mrq->data_len = length > sizeof(mrq->data) ? sizeof(mrq->data) : length; | |
304 | if (mrq->data_dir == WRITE) | |
305 | memcpy(mrq->data, buf, mrq->data_len); | |
306 | ||
e1f19995 | 307 | mrq->long_data = 0; |
baf8532a AD |
308 | |
309 | if (tpc == MS_TPC_SET_CMD || tpc == MS_TPC_EX_SET_CMD) | |
310 | mrq->need_card_int = 1; | |
311 | else | |
312 | mrq->need_card_int = 0; | |
baf8532a AD |
313 | } |
314 | EXPORT_SYMBOL(memstick_init_req); | |
315 | ||
316 | /* | |
317 | * Functions prefixed with "h_" are protocol callbacks. They can be called from | |
318 | * interrupt context. Return value of 0 means that request processing is still | |
319 | * ongoing, while special error value of -EAGAIN means that current request is | |
320 | * finished (and request processor should come back some time later). | |
321 | */ | |
322 | ||
323 | static int h_memstick_read_dev_id(struct memstick_dev *card, | |
324 | struct memstick_request **mrq) | |
325 | { | |
326 | struct ms_id_register id_reg; | |
327 | ||
328 | if (!(*mrq)) { | |
de182cc8 | 329 | memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, &id_reg, |
baf8532a AD |
330 | sizeof(struct ms_id_register)); |
331 | *mrq = &card->current_mrq; | |
332 | return 0; | |
baf8532a | 333 | } |
9a8a369b JP |
334 | if (!(*mrq)->error) { |
335 | memcpy(&id_reg, (*mrq)->data, sizeof(id_reg)); | |
336 | card->id.match_flags = MEMSTICK_MATCH_ALL; | |
337 | card->id.type = id_reg.type; | |
338 | card->id.category = id_reg.category; | |
339 | card->id.class = id_reg.class; | |
340 | dev_dbg(&card->dev, "if_mode = %02x\n", id_reg.if_mode); | |
341 | } | |
342 | complete(&card->mrq_complete); | |
343 | return -EAGAIN; | |
baf8532a AD |
344 | } |
345 | ||
346 | static int h_memstick_set_rw_addr(struct memstick_dev *card, | |
347 | struct memstick_request **mrq) | |
348 | { | |
349 | if (!(*mrq)) { | |
350 | memstick_init_req(&card->current_mrq, MS_TPC_SET_RW_REG_ADRS, | |
351 | (char *)&card->reg_addr, | |
352 | sizeof(card->reg_addr)); | |
353 | *mrq = &card->current_mrq; | |
354 | return 0; | |
355 | } else { | |
356 | complete(&card->mrq_complete); | |
357 | return -EAGAIN; | |
358 | } | |
359 | } | |
360 | ||
361 | /** | |
362 | * memstick_set_rw_addr - issue SET_RW_REG_ADDR request and wait for it to | |
363 | * complete | |
364 | * @card - media device to use | |
365 | */ | |
366 | int memstick_set_rw_addr(struct memstick_dev *card) | |
367 | { | |
368 | card->next_request = h_memstick_set_rw_addr; | |
369 | memstick_new_req(card->host); | |
370 | wait_for_completion(&card->mrq_complete); | |
371 | ||
372 | return card->current_mrq.error; | |
373 | } | |
374 | EXPORT_SYMBOL(memstick_set_rw_addr); | |
375 | ||
376 | static struct memstick_dev *memstick_alloc_card(struct memstick_host *host) | |
377 | { | |
378 | struct memstick_dev *card = kzalloc(sizeof(struct memstick_dev), | |
379 | GFP_KERNEL); | |
380 | struct memstick_dev *old_card = host->card; | |
381 | struct ms_id_register id_reg; | |
382 | ||
383 | if (card) { | |
384 | card->host = host; | |
0252c3b4 | 385 | dev_set_name(&card->dev, "%s", dev_name(&host->dev)); |
c4c66cf1 | 386 | card->dev.parent = &host->dev; |
baf8532a AD |
387 | card->dev.bus = &memstick_bus_type; |
388 | card->dev.release = memstick_free_card; | |
389 | card->check = memstick_dummy_check; | |
390 | ||
391 | card->reg_addr.r_offset = offsetof(struct ms_register, id); | |
392 | card->reg_addr.r_length = sizeof(id_reg); | |
393 | card->reg_addr.w_offset = offsetof(struct ms_register, id); | |
394 | card->reg_addr.w_length = sizeof(id_reg); | |
395 | ||
396 | init_completion(&card->mrq_complete); | |
397 | ||
398 | host->card = card; | |
399 | if (memstick_set_rw_addr(card)) | |
400 | goto err_out; | |
401 | ||
402 | card->next_request = h_memstick_read_dev_id; | |
403 | memstick_new_req(host); | |
404 | wait_for_completion(&card->mrq_complete); | |
405 | ||
406 | if (card->current_mrq.error) | |
407 | goto err_out; | |
408 | } | |
409 | host->card = old_card; | |
410 | return card; | |
411 | err_out: | |
412 | host->card = old_card; | |
4b6d621c | 413 | kfree_const(card->dev.kobj.name); |
baf8532a AD |
414 | kfree(card); |
415 | return NULL; | |
416 | } | |
417 | ||
b7789998 | 418 | static int memstick_power_on(struct memstick_host *host) |
baf8532a | 419 | { |
b7789998 AD |
420 | int rc = host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON); |
421 | ||
422 | if (!rc) | |
423 | rc = host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL); | |
424 | ||
425 | return rc; | |
baf8532a AD |
426 | } |
427 | ||
428 | static void memstick_check(struct work_struct *work) | |
429 | { | |
430 | struct memstick_host *host = container_of(work, struct memstick_host, | |
431 | media_checker); | |
432 | struct memstick_dev *card; | |
433 | ||
c4c66cf1 | 434 | dev_dbg(&host->dev, "memstick_check started\n"); |
e03e303e | 435 | pm_runtime_get_noresume(host->dev.parent); |
baf8532a | 436 | mutex_lock(&host->lock); |
17017d8d AD |
437 | if (!host->card) { |
438 | if (memstick_power_on(host)) | |
439 | goto out_power_off; | |
8e82f8c3 | 440 | } else if (host->card->stop) |
17017d8d | 441 | host->card->stop(host->card); |
baf8532a | 442 | |
62c59a87 KHF |
443 | if (host->removing) |
444 | goto out_power_off; | |
445 | ||
baf8532a AD |
446 | card = memstick_alloc_card(host); |
447 | ||
448 | if (!card) { | |
449 | if (host->card) { | |
450 | device_unregister(&host->card->dev); | |
451 | host->card = NULL; | |
452 | } | |
453 | } else { | |
c4c66cf1 | 454 | dev_dbg(&host->dev, "new card %02x, %02x, %02x\n", |
baf8532a AD |
455 | card->id.type, card->id.category, card->id.class); |
456 | if (host->card) { | |
457 | if (memstick_set_rw_addr(host->card) | |
458 | || !memstick_dev_match(host->card, &card->id) | |
459 | || !(host->card->check(host->card))) { | |
460 | device_unregister(&host->card->dev); | |
461 | host->card = NULL; | |
8e82f8c3 | 462 | } else if (host->card->start) |
17017d8d | 463 | host->card->start(host->card); |
baf8532a AD |
464 | } |
465 | ||
466 | if (!host->card) { | |
467 | host->card = card; | |
468 | if (device_register(&card->dev)) { | |
0193383a | 469 | put_device(&card->dev); |
baf8532a AD |
470 | host->card = NULL; |
471 | } | |
4b6d621c GKH |
472 | } else { |
473 | kfree_const(card->dev.kobj.name); | |
baf8532a | 474 | kfree(card); |
4b6d621c | 475 | } |
baf8532a AD |
476 | } |
477 | ||
17017d8d | 478 | out_power_off: |
baf8532a AD |
479 | if (!host->card) |
480 | host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF); | |
481 | ||
482 | mutex_unlock(&host->lock); | |
e03e303e | 483 | pm_runtime_put(host->dev.parent); |
c4c66cf1 | 484 | dev_dbg(&host->dev, "memstick_check finished\n"); |
baf8532a AD |
485 | } |
486 | ||
487 | /** | |
488 | * memstick_alloc_host - allocate a memstick_host structure | |
489 | * @extra: size of the user private data to allocate | |
490 | * @dev: parent device of the host | |
491 | */ | |
492 | struct memstick_host *memstick_alloc_host(unsigned int extra, | |
493 | struct device *dev) | |
494 | { | |
495 | struct memstick_host *host; | |
496 | ||
497 | host = kzalloc(sizeof(struct memstick_host) + extra, GFP_KERNEL); | |
498 | if (host) { | |
499 | mutex_init(&host->lock); | |
500 | INIT_WORK(&host->media_checker, memstick_check); | |
c4c66cf1 GKH |
501 | host->dev.class = &memstick_host_class; |
502 | host->dev.parent = dev; | |
503 | device_initialize(&host->dev); | |
baf8532a AD |
504 | } |
505 | return host; | |
506 | } | |
507 | EXPORT_SYMBOL(memstick_alloc_host); | |
508 | ||
509 | /** | |
510 | * memstick_add_host - start request processing on memstick host | |
511 | * @host - host to use | |
512 | */ | |
513 | int memstick_add_host(struct memstick_host *host) | |
514 | { | |
515 | int rc; | |
516 | ||
7b51f478 TH |
517 | idr_preload(GFP_KERNEL); |
518 | spin_lock(&memstick_host_lock); | |
baf8532a | 519 | |
7b51f478 TH |
520 | rc = idr_alloc(&memstick_host_idr, host, 0, 0, GFP_NOWAIT); |
521 | if (rc >= 0) | |
522 | host->id = rc; | |
523 | ||
524 | spin_unlock(&memstick_host_lock); | |
525 | idr_preload_end(); | |
526 | if (rc < 0) | |
527 | return rc; | |
baf8532a | 528 | |
0252c3b4 | 529 | dev_set_name(&host->dev, "memstick%u", host->id); |
baf8532a | 530 | |
c4c66cf1 | 531 | rc = device_add(&host->dev); |
baf8532a AD |
532 | if (rc) { |
533 | spin_lock(&memstick_host_lock); | |
534 | idr_remove(&memstick_host_idr, host->id); | |
535 | spin_unlock(&memstick_host_lock); | |
536 | return rc; | |
537 | } | |
538 | ||
539 | host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF); | |
540 | memstick_detect_change(host); | |
541 | return 0; | |
542 | } | |
543 | EXPORT_SYMBOL(memstick_add_host); | |
544 | ||
545 | /** | |
546 | * memstick_remove_host - stop request processing on memstick host | |
547 | * @host - host to use | |
548 | */ | |
549 | void memstick_remove_host(struct memstick_host *host) | |
550 | { | |
62c59a87 | 551 | host->removing = 1; |
baf8532a AD |
552 | flush_workqueue(workqueue); |
553 | mutex_lock(&host->lock); | |
554 | if (host->card) | |
555 | device_unregister(&host->card->dev); | |
556 | host->card = NULL; | |
557 | host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF); | |
558 | mutex_unlock(&host->lock); | |
559 | ||
560 | spin_lock(&memstick_host_lock); | |
561 | idr_remove(&memstick_host_idr, host->id); | |
562 | spin_unlock(&memstick_host_lock); | |
c4c66cf1 | 563 | device_del(&host->dev); |
baf8532a AD |
564 | } |
565 | EXPORT_SYMBOL(memstick_remove_host); | |
566 | ||
567 | /** | |
568 | * memstick_free_host - free memstick host | |
569 | * @host - host to use | |
570 | */ | |
571 | void memstick_free_host(struct memstick_host *host) | |
572 | { | |
573 | mutex_destroy(&host->lock); | |
c4c66cf1 | 574 | put_device(&host->dev); |
baf8532a AD |
575 | } |
576 | EXPORT_SYMBOL(memstick_free_host); | |
577 | ||
d114ad54 AD |
578 | /** |
579 | * memstick_suspend_host - notify bus driver of host suspension | |
580 | * @host - host to use | |
581 | */ | |
582 | void memstick_suspend_host(struct memstick_host *host) | |
583 | { | |
584 | mutex_lock(&host->lock); | |
585 | host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF); | |
586 | mutex_unlock(&host->lock); | |
587 | } | |
588 | EXPORT_SYMBOL(memstick_suspend_host); | |
589 | ||
590 | /** | |
591 | * memstick_resume_host - notify bus driver of host resumption | |
592 | * @host - host to use | |
593 | */ | |
594 | void memstick_resume_host(struct memstick_host *host) | |
595 | { | |
b7789998 AD |
596 | int rc = 0; |
597 | ||
d114ad54 | 598 | mutex_lock(&host->lock); |
ead70773 | 599 | if (host->card) |
b7789998 | 600 | rc = memstick_power_on(host); |
d114ad54 | 601 | mutex_unlock(&host->lock); |
b7789998 AD |
602 | |
603 | if (!rc) | |
604 | memstick_detect_change(host); | |
d114ad54 AD |
605 | } |
606 | EXPORT_SYMBOL(memstick_resume_host); | |
607 | ||
baf8532a AD |
608 | int memstick_register_driver(struct memstick_driver *drv) |
609 | { | |
610 | drv->driver.bus = &memstick_bus_type; | |
611 | ||
612 | return driver_register(&drv->driver); | |
613 | } | |
614 | EXPORT_SYMBOL(memstick_register_driver); | |
615 | ||
616 | void memstick_unregister_driver(struct memstick_driver *drv) | |
617 | { | |
618 | driver_unregister(&drv->driver); | |
619 | } | |
620 | EXPORT_SYMBOL(memstick_unregister_driver); | |
621 | ||
622 | ||
623 | static int __init memstick_init(void) | |
624 | { | |
625 | int rc; | |
626 | ||
58a69cb4 | 627 | workqueue = create_freezable_workqueue("kmemstick"); |
baf8532a AD |
628 | if (!workqueue) |
629 | return -ENOMEM; | |
630 | ||
631 | rc = bus_register(&memstick_bus_type); | |
65f1a0d3 WH |
632 | if (rc) |
633 | goto error_destroy_workqueue; | |
baf8532a | 634 | |
65f1a0d3 WH |
635 | rc = class_register(&memstick_host_class); |
636 | if (rc) | |
637 | goto error_bus_unregister; | |
638 | ||
639 | return 0; | |
baf8532a | 640 | |
65f1a0d3 | 641 | error_bus_unregister: |
baf8532a | 642 | bus_unregister(&memstick_bus_type); |
65f1a0d3 | 643 | error_destroy_workqueue: |
baf8532a AD |
644 | destroy_workqueue(workqueue); |
645 | ||
646 | return rc; | |
647 | } | |
648 | ||
649 | static void __exit memstick_exit(void) | |
650 | { | |
651 | class_unregister(&memstick_host_class); | |
652 | bus_unregister(&memstick_bus_type); | |
653 | destroy_workqueue(workqueue); | |
654 | idr_destroy(&memstick_host_idr); | |
655 | } | |
656 | ||
657 | module_init(memstick_init); | |
658 | module_exit(memstick_exit); | |
659 | ||
660 | MODULE_AUTHOR("Alex Dubov"); | |
661 | MODULE_LICENSE("GPL"); | |
662 | MODULE_DESCRIPTION("Sony MemoryStick core driver"); |