Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 19 | #include <linux/slab.h> |
Paul Gortmaker | c47e789 | 2011-07-03 15:12:37 -0400 | [diff] [blame] | 20 | #include <linux/module.h> |
Kai-Heng Feng | 4bde07d | 2018-11-05 16:45:04 +0800 | [diff] [blame] | 21 | #include <linux/pm_runtime.h> |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 22 | |
| 23 | #define DRIVER_NAME "memstick" |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 24 | |
| 25 | static unsigned int cmd_retries = 3; |
| 26 | module_param(cmd_retries, uint, 0644); |
| 27 | |
| 28 | static struct workqueue_struct *workqueue; |
| 29 | static DEFINE_IDR(memstick_host_idr); |
| 30 | static DEFINE_SPINLOCK(memstick_host_lock); |
| 31 | |
| 32 | static int memstick_dev_match(struct memstick_dev *card, |
| 33 | struct memstick_device_id *id) |
| 34 | { |
| 35 | if (id->match_flags & MEMSTICK_MATCH_ALL) { |
| 36 | if ((id->type == card->id.type) |
| 37 | && (id->category == card->id.category) |
| 38 | && (id->class == card->id.class)) |
| 39 | return 1; |
| 40 | } |
| 41 | |
| 42 | return 0; |
| 43 | } |
| 44 | |
| 45 | static int memstick_bus_match(struct device *dev, struct device_driver *drv) |
| 46 | { |
| 47 | struct memstick_dev *card = container_of(dev, struct memstick_dev, |
| 48 | dev); |
| 49 | struct memstick_driver *ms_drv = container_of(drv, |
| 50 | struct memstick_driver, |
| 51 | driver); |
| 52 | struct memstick_device_id *ids = ms_drv->id_table; |
| 53 | |
| 54 | if (ids) { |
| 55 | while (ids->match_flags) { |
| 56 | if (memstick_dev_match(card, ids)) |
| 57 | return 1; |
| 58 | ++ids; |
| 59 | } |
| 60 | } |
| 61 | return 0; |
| 62 | } |
| 63 | |
| 64 | static int memstick_uevent(struct device *dev, struct kobj_uevent_env *env) |
| 65 | { |
| 66 | struct memstick_dev *card = container_of(dev, struct memstick_dev, |
| 67 | dev); |
| 68 | |
| 69 | if (add_uevent_var(env, "MEMSTICK_TYPE=%02X", card->id.type)) |
| 70 | return -ENOMEM; |
| 71 | |
| 72 | if (add_uevent_var(env, "MEMSTICK_CATEGORY=%02X", card->id.category)) |
| 73 | return -ENOMEM; |
| 74 | |
| 75 | if (add_uevent_var(env, "MEMSTICK_CLASS=%02X", card->id.class)) |
| 76 | return -ENOMEM; |
| 77 | |
| 78 | return 0; |
| 79 | } |
| 80 | |
| 81 | static int memstick_device_probe(struct device *dev) |
| 82 | { |
| 83 | struct memstick_dev *card = container_of(dev, struct memstick_dev, |
| 84 | dev); |
| 85 | struct memstick_driver *drv = container_of(dev->driver, |
| 86 | struct memstick_driver, |
| 87 | driver); |
| 88 | int rc = -ENODEV; |
| 89 | |
| 90 | if (dev->driver && drv->probe) { |
| 91 | rc = drv->probe(card); |
| 92 | if (!rc) |
| 93 | get_device(dev); |
| 94 | } |
| 95 | return rc; |
| 96 | } |
| 97 | |
| 98 | static int memstick_device_remove(struct device *dev) |
| 99 | { |
| 100 | struct memstick_dev *card = container_of(dev, struct memstick_dev, |
| 101 | dev); |
| 102 | struct memstick_driver *drv = container_of(dev->driver, |
| 103 | struct memstick_driver, |
| 104 | driver); |
| 105 | |
| 106 | if (dev->driver && drv->remove) { |
| 107 | drv->remove(card); |
| 108 | card->dev.driver = NULL; |
| 109 | } |
| 110 | |
| 111 | put_device(dev); |
| 112 | return 0; |
| 113 | } |
| 114 | |
| 115 | #ifdef CONFIG_PM |
| 116 | |
| 117 | static int memstick_device_suspend(struct device *dev, pm_message_t state) |
| 118 | { |
| 119 | struct memstick_dev *card = container_of(dev, struct memstick_dev, |
| 120 | dev); |
| 121 | struct memstick_driver *drv = container_of(dev->driver, |
| 122 | struct memstick_driver, |
| 123 | driver); |
| 124 | |
| 125 | if (dev->driver && drv->suspend) |
| 126 | return drv->suspend(card, state); |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | static int memstick_device_resume(struct device *dev) |
| 131 | { |
| 132 | struct memstick_dev *card = container_of(dev, struct memstick_dev, |
| 133 | dev); |
| 134 | struct memstick_driver *drv = container_of(dev->driver, |
| 135 | struct memstick_driver, |
| 136 | driver); |
| 137 | |
| 138 | if (dev->driver && drv->resume) |
| 139 | return drv->resume(card); |
| 140 | return 0; |
| 141 | } |
| 142 | |
| 143 | #else |
| 144 | |
| 145 | #define memstick_device_suspend NULL |
| 146 | #define memstick_device_resume NULL |
| 147 | |
| 148 | #endif /* CONFIG_PM */ |
| 149 | |
| 150 | #define MEMSTICK_ATTR(name, format) \ |
| 151 | static ssize_t name##_show(struct device *dev, struct device_attribute *attr, \ |
| 152 | char *buf) \ |
| 153 | { \ |
| 154 | struct memstick_dev *card = container_of(dev, struct memstick_dev, \ |
| 155 | dev); \ |
| 156 | return sprintf(buf, format, card->id.name); \ |
Greg Kroah-Hartman | b785464 | 2013-10-07 18:27:41 -0700 | [diff] [blame] | 157 | } \ |
| 158 | static DEVICE_ATTR_RO(name); |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 159 | |
| 160 | MEMSTICK_ATTR(type, "%02X"); |
| 161 | MEMSTICK_ATTR(category, "%02X"); |
| 162 | MEMSTICK_ATTR(class, "%02X"); |
| 163 | |
Greg Kroah-Hartman | b785464 | 2013-10-07 18:27:41 -0700 | [diff] [blame] | 164 | static struct attribute *memstick_dev_attrs[] = { |
| 165 | &dev_attr_type.attr, |
| 166 | &dev_attr_category.attr, |
| 167 | &dev_attr_class.attr, |
| 168 | NULL, |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 169 | }; |
Greg Kroah-Hartman | b785464 | 2013-10-07 18:27:41 -0700 | [diff] [blame] | 170 | ATTRIBUTE_GROUPS(memstick_dev); |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 171 | |
| 172 | static struct bus_type memstick_bus_type = { |
| 173 | .name = "memstick", |
Greg Kroah-Hartman | b785464 | 2013-10-07 18:27:41 -0700 | [diff] [blame] | 174 | .dev_groups = memstick_dev_groups, |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 175 | .match = memstick_bus_match, |
| 176 | .uevent = memstick_uevent, |
| 177 | .probe = memstick_device_probe, |
| 178 | .remove = memstick_device_remove, |
| 179 | .suspend = memstick_device_suspend, |
| 180 | .resume = memstick_device_resume |
| 181 | }; |
| 182 | |
Greg Kroah-Hartman | c4c66cf | 2008-03-04 00:13:36 +0100 | [diff] [blame] | 183 | static void memstick_free(struct device *dev) |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 184 | { |
Greg Kroah-Hartman | c4c66cf | 2008-03-04 00:13:36 +0100 | [diff] [blame] | 185 | struct memstick_host *host = container_of(dev, struct memstick_host, |
| 186 | dev); |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 187 | kfree(host); |
| 188 | } |
| 189 | |
| 190 | static struct class memstick_host_class = { |
Alex Dubov | 8e82f8c | 2008-09-13 02:33:26 -0700 | [diff] [blame] | 191 | .name = "memstick_host", |
Greg Kroah-Hartman | c4c66cf | 2008-03-04 00:13:36 +0100 | [diff] [blame] | 192 | .dev_release = memstick_free |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 193 | }; |
| 194 | |
| 195 | static void memstick_free_card(struct device *dev) |
| 196 | { |
| 197 | struct memstick_dev *card = container_of(dev, struct memstick_dev, |
| 198 | dev); |
| 199 | kfree(card); |
| 200 | } |
| 201 | |
| 202 | static int memstick_dummy_check(struct memstick_dev *card) |
| 203 | { |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | /** |
| 208 | * memstick_detect_change - schedule media detection on memstick host |
| 209 | * @host - host to use |
| 210 | */ |
| 211 | void memstick_detect_change(struct memstick_host *host) |
| 212 | { |
| 213 | queue_work(workqueue, &host->media_checker); |
| 214 | } |
| 215 | EXPORT_SYMBOL(memstick_detect_change); |
| 216 | |
| 217 | /** |
| 218 | * memstick_next_req - called by host driver to obtain next request to process |
| 219 | * @host - host to use |
| 220 | * @mrq - pointer to stick the request to |
| 221 | * |
| 222 | * Host calls this function from idle state (*mrq == NULL) or after finishing |
| 223 | * previous request (*mrq should point to it). If previous request was |
| 224 | * unsuccessful, it is retried for predetermined number of times. Return value |
| 225 | * of 0 means that new request was assigned to the host. |
| 226 | */ |
| 227 | int memstick_next_req(struct memstick_host *host, struct memstick_request **mrq) |
| 228 | { |
| 229 | int rc = -ENXIO; |
| 230 | |
| 231 | if ((*mrq) && (*mrq)->error && host->retries) { |
| 232 | (*mrq)->error = rc; |
| 233 | host->retries--; |
| 234 | return 0; |
| 235 | } |
| 236 | |
| 237 | if (host->card && host->card->next_request) |
| 238 | rc = host->card->next_request(host->card, mrq); |
| 239 | |
| 240 | if (!rc) |
Alex Dubov | 29196dc | 2008-03-10 11:43:38 -0700 | [diff] [blame] | 241 | host->retries = cmd_retries > 1 ? cmd_retries - 1 : 1; |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 242 | else |
| 243 | *mrq = NULL; |
| 244 | |
| 245 | return rc; |
| 246 | } |
| 247 | EXPORT_SYMBOL(memstick_next_req); |
| 248 | |
| 249 | /** |
| 250 | * memstick_new_req - notify the host that some requests are pending |
| 251 | * @host - host to use |
| 252 | */ |
| 253 | void memstick_new_req(struct memstick_host *host) |
| 254 | { |
Alex Dubov | f1d8269 | 2008-07-25 19:45:02 -0700 | [diff] [blame] | 255 | if (host->card) { |
| 256 | host->retries = cmd_retries; |
Wolfram Sang | 16735d0 | 2013-11-14 14:32:02 -0800 | [diff] [blame] | 257 | reinit_completion(&host->card->mrq_complete); |
Alex Dubov | f1d8269 | 2008-07-25 19:45:02 -0700 | [diff] [blame] | 258 | host->request(host); |
| 259 | } |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 260 | } |
| 261 | EXPORT_SYMBOL(memstick_new_req); |
| 262 | |
| 263 | /** |
| 264 | * memstick_init_req_sg - set request fields needed for bulk data transfer |
| 265 | * @mrq - request to use |
| 266 | * @tpc - memstick Transport Protocol Command |
| 267 | * @sg - TPC argument |
| 268 | */ |
| 269 | void memstick_init_req_sg(struct memstick_request *mrq, unsigned char tpc, |
Alex Dubov | 8e82f8c | 2008-09-13 02:33:26 -0700 | [diff] [blame] | 270 | const struct scatterlist *sg) |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 271 | { |
| 272 | mrq->tpc = tpc; |
| 273 | if (tpc & 8) |
| 274 | mrq->data_dir = WRITE; |
| 275 | else |
| 276 | mrq->data_dir = READ; |
| 277 | |
| 278 | mrq->sg = *sg; |
Alex Dubov | e1f1999 | 2008-03-10 11:43:37 -0700 | [diff] [blame] | 279 | mrq->long_data = 1; |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 280 | |
| 281 | if (tpc == MS_TPC_SET_CMD || tpc == MS_TPC_EX_SET_CMD) |
| 282 | mrq->need_card_int = 1; |
| 283 | else |
| 284 | mrq->need_card_int = 0; |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 285 | } |
| 286 | EXPORT_SYMBOL(memstick_init_req_sg); |
| 287 | |
| 288 | /** |
| 289 | * memstick_init_req - set request fields needed for short data transfer |
| 290 | * @mrq - request to use |
| 291 | * @tpc - memstick Transport Protocol Command |
| 292 | * @buf - TPC argument buffer |
| 293 | * @length - TPC argument size |
| 294 | * |
| 295 | * The intended use of this function (transfer of data items several bytes |
| 296 | * in size) allows us to just copy the value between request structure and |
| 297 | * user supplied buffer. |
| 298 | */ |
| 299 | void memstick_init_req(struct memstick_request *mrq, unsigned char tpc, |
Alex Dubov | 8e82f8c | 2008-09-13 02:33:26 -0700 | [diff] [blame] | 300 | const void *buf, size_t length) |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 301 | { |
| 302 | mrq->tpc = tpc; |
| 303 | if (tpc & 8) |
| 304 | mrq->data_dir = WRITE; |
| 305 | else |
| 306 | mrq->data_dir = READ; |
| 307 | |
| 308 | mrq->data_len = length > sizeof(mrq->data) ? sizeof(mrq->data) : length; |
| 309 | if (mrq->data_dir == WRITE) |
| 310 | memcpy(mrq->data, buf, mrq->data_len); |
| 311 | |
Alex Dubov | e1f1999 | 2008-03-10 11:43:37 -0700 | [diff] [blame] | 312 | mrq->long_data = 0; |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 313 | |
| 314 | if (tpc == MS_TPC_SET_CMD || tpc == MS_TPC_EX_SET_CMD) |
| 315 | mrq->need_card_int = 1; |
| 316 | else |
| 317 | mrq->need_card_int = 0; |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 318 | } |
| 319 | EXPORT_SYMBOL(memstick_init_req); |
| 320 | |
| 321 | /* |
| 322 | * Functions prefixed with "h_" are protocol callbacks. They can be called from |
| 323 | * interrupt context. Return value of 0 means that request processing is still |
| 324 | * ongoing, while special error value of -EAGAIN means that current request is |
| 325 | * finished (and request processor should come back some time later). |
| 326 | */ |
| 327 | |
| 328 | static int h_memstick_read_dev_id(struct memstick_dev *card, |
| 329 | struct memstick_request **mrq) |
| 330 | { |
| 331 | struct ms_id_register id_reg; |
| 332 | |
| 333 | if (!(*mrq)) { |
| 334 | memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, NULL, |
| 335 | sizeof(struct ms_id_register)); |
| 336 | *mrq = &card->current_mrq; |
| 337 | return 0; |
| 338 | } else { |
| 339 | if (!(*mrq)->error) { |
| 340 | memcpy(&id_reg, (*mrq)->data, sizeof(id_reg)); |
| 341 | card->id.match_flags = MEMSTICK_MATCH_ALL; |
| 342 | card->id.type = id_reg.type; |
| 343 | card->id.category = id_reg.category; |
| 344 | card->id.class = id_reg.class; |
Jiri Slaby | b873c2f | 2009-09-23 15:57:31 -0700 | [diff] [blame] | 345 | dev_dbg(&card->dev, "if_mode = %02x\n", id_reg.if_mode); |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 346 | } |
| 347 | complete(&card->mrq_complete); |
| 348 | return -EAGAIN; |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | static int h_memstick_set_rw_addr(struct memstick_dev *card, |
| 353 | struct memstick_request **mrq) |
| 354 | { |
| 355 | if (!(*mrq)) { |
| 356 | memstick_init_req(&card->current_mrq, MS_TPC_SET_RW_REG_ADRS, |
| 357 | (char *)&card->reg_addr, |
| 358 | sizeof(card->reg_addr)); |
| 359 | *mrq = &card->current_mrq; |
| 360 | return 0; |
| 361 | } else { |
| 362 | complete(&card->mrq_complete); |
| 363 | return -EAGAIN; |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | /** |
| 368 | * memstick_set_rw_addr - issue SET_RW_REG_ADDR request and wait for it to |
| 369 | * complete |
| 370 | * @card - media device to use |
| 371 | */ |
| 372 | int memstick_set_rw_addr(struct memstick_dev *card) |
| 373 | { |
| 374 | card->next_request = h_memstick_set_rw_addr; |
| 375 | memstick_new_req(card->host); |
| 376 | wait_for_completion(&card->mrq_complete); |
| 377 | |
| 378 | return card->current_mrq.error; |
| 379 | } |
| 380 | EXPORT_SYMBOL(memstick_set_rw_addr); |
| 381 | |
| 382 | static struct memstick_dev *memstick_alloc_card(struct memstick_host *host) |
| 383 | { |
| 384 | struct memstick_dev *card = kzalloc(sizeof(struct memstick_dev), |
| 385 | GFP_KERNEL); |
| 386 | struct memstick_dev *old_card = host->card; |
| 387 | struct ms_id_register id_reg; |
| 388 | |
| 389 | if (card) { |
| 390 | card->host = host; |
Kay Sievers | 0252c3b | 2009-01-06 10:44:38 -0800 | [diff] [blame] | 391 | dev_set_name(&card->dev, "%s", dev_name(&host->dev)); |
Greg Kroah-Hartman | c4c66cf | 2008-03-04 00:13:36 +0100 | [diff] [blame] | 392 | card->dev.parent = &host->dev; |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 393 | card->dev.bus = &memstick_bus_type; |
| 394 | card->dev.release = memstick_free_card; |
| 395 | card->check = memstick_dummy_check; |
| 396 | |
| 397 | card->reg_addr.r_offset = offsetof(struct ms_register, id); |
| 398 | card->reg_addr.r_length = sizeof(id_reg); |
| 399 | card->reg_addr.w_offset = offsetof(struct ms_register, id); |
| 400 | card->reg_addr.w_length = sizeof(id_reg); |
| 401 | |
| 402 | init_completion(&card->mrq_complete); |
| 403 | |
| 404 | host->card = card; |
| 405 | if (memstick_set_rw_addr(card)) |
| 406 | goto err_out; |
| 407 | |
| 408 | card->next_request = h_memstick_read_dev_id; |
| 409 | memstick_new_req(host); |
| 410 | wait_for_completion(&card->mrq_complete); |
| 411 | |
| 412 | if (card->current_mrq.error) |
| 413 | goto err_out; |
| 414 | } |
| 415 | host->card = old_card; |
| 416 | return card; |
| 417 | err_out: |
| 418 | host->card = old_card; |
| 419 | kfree(card); |
| 420 | return NULL; |
| 421 | } |
| 422 | |
Alex Dubov | b778999 | 2008-07-25 19:45:00 -0700 | [diff] [blame] | 423 | static int memstick_power_on(struct memstick_host *host) |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 424 | { |
Alex Dubov | b778999 | 2008-07-25 19:45:00 -0700 | [diff] [blame] | 425 | int rc = host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON); |
| 426 | |
| 427 | if (!rc) |
| 428 | rc = host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL); |
| 429 | |
| 430 | return rc; |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 431 | } |
| 432 | |
| 433 | static void memstick_check(struct work_struct *work) |
| 434 | { |
| 435 | struct memstick_host *host = container_of(work, struct memstick_host, |
| 436 | media_checker); |
| 437 | struct memstick_dev *card; |
| 438 | |
Greg Kroah-Hartman | c4c66cf | 2008-03-04 00:13:36 +0100 | [diff] [blame] | 439 | dev_dbg(&host->dev, "memstick_check started\n"); |
Kai-Heng Feng | 4bde07d | 2018-11-05 16:45:04 +0800 | [diff] [blame] | 440 | pm_runtime_get_noresume(host->dev.parent); |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 441 | mutex_lock(&host->lock); |
Alex Dubov | 17017d8 | 2008-07-25 19:45:01 -0700 | [diff] [blame] | 442 | if (!host->card) { |
| 443 | if (memstick_power_on(host)) |
| 444 | goto out_power_off; |
Alex Dubov | 8e82f8c | 2008-09-13 02:33:26 -0700 | [diff] [blame] | 445 | } else if (host->card->stop) |
Alex Dubov | 17017d8 | 2008-07-25 19:45:01 -0700 | [diff] [blame] | 446 | host->card->stop(host->card); |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 447 | |
| 448 | card = memstick_alloc_card(host); |
| 449 | |
| 450 | if (!card) { |
| 451 | if (host->card) { |
| 452 | device_unregister(&host->card->dev); |
| 453 | host->card = NULL; |
| 454 | } |
| 455 | } else { |
Greg Kroah-Hartman | c4c66cf | 2008-03-04 00:13:36 +0100 | [diff] [blame] | 456 | dev_dbg(&host->dev, "new card %02x, %02x, %02x\n", |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 457 | card->id.type, card->id.category, card->id.class); |
| 458 | if (host->card) { |
| 459 | if (memstick_set_rw_addr(host->card) |
| 460 | || !memstick_dev_match(host->card, &card->id) |
| 461 | || !(host->card->check(host->card))) { |
| 462 | device_unregister(&host->card->dev); |
| 463 | host->card = NULL; |
Alex Dubov | 8e82f8c | 2008-09-13 02:33:26 -0700 | [diff] [blame] | 464 | } else if (host->card->start) |
Alex Dubov | 17017d8 | 2008-07-25 19:45:01 -0700 | [diff] [blame] | 465 | host->card->start(host->card); |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 466 | } |
| 467 | |
| 468 | if (!host->card) { |
| 469 | host->card = card; |
| 470 | if (device_register(&card->dev)) { |
Vasiliy Kulikov | 0193383 | 2011-01-12 17:01:00 -0800 | [diff] [blame] | 471 | put_device(&card->dev); |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 472 | kfree(host->card); |
| 473 | host->card = NULL; |
| 474 | } |
| 475 | } else |
| 476 | kfree(card); |
| 477 | } |
| 478 | |
Alex Dubov | 17017d8 | 2008-07-25 19:45:01 -0700 | [diff] [blame] | 479 | out_power_off: |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 480 | if (!host->card) |
| 481 | host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF); |
| 482 | |
| 483 | mutex_unlock(&host->lock); |
Kai-Heng Feng | 4bde07d | 2018-11-05 16:45:04 +0800 | [diff] [blame] | 484 | pm_runtime_put(host->dev.parent); |
Greg Kroah-Hartman | c4c66cf | 2008-03-04 00:13:36 +0100 | [diff] [blame] | 485 | dev_dbg(&host->dev, "memstick_check finished\n"); |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 486 | } |
| 487 | |
| 488 | /** |
| 489 | * memstick_alloc_host - allocate a memstick_host structure |
| 490 | * @extra: size of the user private data to allocate |
| 491 | * @dev: parent device of the host |
| 492 | */ |
| 493 | struct memstick_host *memstick_alloc_host(unsigned int extra, |
| 494 | struct device *dev) |
| 495 | { |
| 496 | struct memstick_host *host; |
| 497 | |
| 498 | host = kzalloc(sizeof(struct memstick_host) + extra, GFP_KERNEL); |
| 499 | if (host) { |
| 500 | mutex_init(&host->lock); |
| 501 | INIT_WORK(&host->media_checker, memstick_check); |
Greg Kroah-Hartman | c4c66cf | 2008-03-04 00:13:36 +0100 | [diff] [blame] | 502 | host->dev.class = &memstick_host_class; |
| 503 | host->dev.parent = dev; |
| 504 | device_initialize(&host->dev); |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 505 | } |
| 506 | return host; |
| 507 | } |
| 508 | EXPORT_SYMBOL(memstick_alloc_host); |
| 509 | |
| 510 | /** |
| 511 | * memstick_add_host - start request processing on memstick host |
| 512 | * @host - host to use |
| 513 | */ |
| 514 | int memstick_add_host(struct memstick_host *host) |
| 515 | { |
| 516 | int rc; |
| 517 | |
Tejun Heo | 7b51f47 | 2013-02-27 17:04:28 -0800 | [diff] [blame] | 518 | idr_preload(GFP_KERNEL); |
| 519 | spin_lock(&memstick_host_lock); |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 520 | |
Tejun Heo | 7b51f47 | 2013-02-27 17:04:28 -0800 | [diff] [blame] | 521 | rc = idr_alloc(&memstick_host_idr, host, 0, 0, GFP_NOWAIT); |
| 522 | if (rc >= 0) |
| 523 | host->id = rc; |
| 524 | |
| 525 | spin_unlock(&memstick_host_lock); |
| 526 | idr_preload_end(); |
| 527 | if (rc < 0) |
| 528 | return rc; |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 529 | |
Kay Sievers | 0252c3b | 2009-01-06 10:44:38 -0800 | [diff] [blame] | 530 | dev_set_name(&host->dev, "memstick%u", host->id); |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 531 | |
Greg Kroah-Hartman | c4c66cf | 2008-03-04 00:13:36 +0100 | [diff] [blame] | 532 | rc = device_add(&host->dev); |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 533 | if (rc) { |
| 534 | spin_lock(&memstick_host_lock); |
| 535 | idr_remove(&memstick_host_idr, host->id); |
| 536 | spin_unlock(&memstick_host_lock); |
| 537 | return rc; |
| 538 | } |
| 539 | |
| 540 | host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF); |
| 541 | memstick_detect_change(host); |
| 542 | return 0; |
| 543 | } |
| 544 | EXPORT_SYMBOL(memstick_add_host); |
| 545 | |
| 546 | /** |
| 547 | * memstick_remove_host - stop request processing on memstick host |
| 548 | * @host - host to use |
| 549 | */ |
| 550 | void memstick_remove_host(struct memstick_host *host) |
| 551 | { |
| 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); |
Greg Kroah-Hartman | c4c66cf | 2008-03-04 00:13:36 +0100 | [diff] [blame] | 563 | device_del(&host->dev); |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 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); |
Greg Kroah-Hartman | c4c66cf | 2008-03-04 00:13:36 +0100 | [diff] [blame] | 574 | put_device(&host->dev); |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 575 | } |
| 576 | EXPORT_SYMBOL(memstick_free_host); |
| 577 | |
Alex Dubov | d114ad5 | 2008-03-10 11:43:38 -0700 | [diff] [blame] | 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 | { |
Alex Dubov | b778999 | 2008-07-25 19:45:00 -0700 | [diff] [blame] | 596 | int rc = 0; |
| 597 | |
Alex Dubov | d114ad5 | 2008-03-10 11:43:38 -0700 | [diff] [blame] | 598 | mutex_lock(&host->lock); |
Alex Dubov | ead7077 | 2008-03-19 17:01:06 -0700 | [diff] [blame] | 599 | if (host->card) |
Alex Dubov | b778999 | 2008-07-25 19:45:00 -0700 | [diff] [blame] | 600 | rc = memstick_power_on(host); |
Alex Dubov | d114ad5 | 2008-03-10 11:43:38 -0700 | [diff] [blame] | 601 | mutex_unlock(&host->lock); |
Alex Dubov | b778999 | 2008-07-25 19:45:00 -0700 | [diff] [blame] | 602 | |
| 603 | if (!rc) |
| 604 | memstick_detect_change(host); |
Alex Dubov | d114ad5 | 2008-03-10 11:43:38 -0700 | [diff] [blame] | 605 | } |
| 606 | EXPORT_SYMBOL(memstick_resume_host); |
| 607 | |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 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 | |
Tejun Heo | 58a69cb | 2011-02-16 09:25:31 +0100 | [diff] [blame] | 627 | workqueue = create_freezable_workqueue("kmemstick"); |
Alex Dubov | baf8532 | 2008-02-09 10:20:54 -0800 | [diff] [blame] | 628 | if (!workqueue) |
| 629 | return -ENOMEM; |
| 630 | |
| 631 | rc = bus_register(&memstick_bus_type); |
| 632 | if (!rc) |
| 633 | rc = class_register(&memstick_host_class); |
| 634 | |
| 635 | if (!rc) |
| 636 | return 0; |
| 637 | |
| 638 | bus_unregister(&memstick_bus_type); |
| 639 | destroy_workqueue(workqueue); |
| 640 | |
| 641 | return rc; |
| 642 | } |
| 643 | |
| 644 | static void __exit memstick_exit(void) |
| 645 | { |
| 646 | class_unregister(&memstick_host_class); |
| 647 | bus_unregister(&memstick_bus_type); |
| 648 | destroy_workqueue(workqueue); |
| 649 | idr_destroy(&memstick_host_idr); |
| 650 | } |
| 651 | |
| 652 | module_init(memstick_init); |
| 653 | module_exit(memstick_exit); |
| 654 | |
| 655 | MODULE_AUTHOR("Alex Dubov"); |
| 656 | MODULE_LICENSE("GPL"); |
| 657 | MODULE_DESCRIPTION("Sony MemoryStick core driver"); |