Commit | Line | Data |
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4101c16a PO |
1 | /* |
2 | * linux/drivers/mmc/core/bus.c | |
3 | * | |
4 | * Copyright (C) 2003 Russell King, All Rights Reserved. | |
5 | * Copyright (C) 2007 Pierre Ossman | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * MMC card bus driver model | |
12 | */ | |
13 | ||
3ef77af1 | 14 | #include <linux/export.h> |
4101c16a PO |
15 | #include <linux/device.h> |
16 | #include <linux/err.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
0205a904 | 18 | #include <linux/stat.h> |
25185f3f | 19 | #include <linux/of.h> |
516d5ccd | 20 | #include <linux/pm_runtime.h> |
4101c16a PO |
21 | |
22 | #include <linux/mmc/card.h> | |
23 | #include <linux/mmc/host.h> | |
24 | ||
4101c16a | 25 | #include "core.h" |
1a632f8c | 26 | #include "sdio_cis.h" |
4101c16a PO |
27 | #include "bus.h" |
28 | ||
96541bac UH |
29 | #define to_mmc_driver(d) container_of(d, struct mmc_driver, drv) |
30 | ||
f24fc57b | 31 | static ssize_t type_show(struct device *dev, |
4101c16a PO |
32 | struct device_attribute *attr, char *buf) |
33 | { | |
265cdc90 | 34 | struct mmc_card *card = mmc_dev_to_card(dev); |
4101c16a PO |
35 | |
36 | switch (card->type) { | |
37 | case MMC_TYPE_MMC: | |
38 | return sprintf(buf, "MMC\n"); | |
39 | case MMC_TYPE_SD: | |
40 | return sprintf(buf, "SD\n"); | |
5c4e6f13 PO |
41 | case MMC_TYPE_SDIO: |
42 | return sprintf(buf, "SDIO\n"); | |
7310ece8 MM |
43 | case MMC_TYPE_SD_COMBO: |
44 | return sprintf(buf, "SDcombo\n"); | |
4101c16a PO |
45 | default: |
46 | return -EFAULT; | |
47 | } | |
48 | } | |
f24fc57b | 49 | static DEVICE_ATTR_RO(type); |
4101c16a | 50 | |
f24fc57b GKH |
51 | static struct attribute *mmc_dev_attrs[] = { |
52 | &dev_attr_type.attr, | |
53 | NULL, | |
4101c16a | 54 | }; |
f24fc57b | 55 | ATTRIBUTE_GROUPS(mmc_dev); |
4101c16a PO |
56 | |
57 | /* | |
58 | * This currently matches any MMC driver to any MMC card - drivers | |
59 | * themselves make the decision whether to drive this card in their | |
60 | * probe method. | |
61 | */ | |
62 | static int mmc_bus_match(struct device *dev, struct device_driver *drv) | |
63 | { | |
64 | return 1; | |
65 | } | |
66 | ||
67 | static int | |
7eff2e7a | 68 | mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
4101c16a | 69 | { |
265cdc90 | 70 | struct mmc_card *card = mmc_dev_to_card(dev); |
9eb3a94d | 71 | const char *type; |
7eff2e7a | 72 | int retval = 0; |
4101c16a PO |
73 | |
74 | switch (card->type) { | |
75 | case MMC_TYPE_MMC: | |
9eb3a94d | 76 | type = "MMC"; |
4101c16a PO |
77 | break; |
78 | case MMC_TYPE_SD: | |
9eb3a94d | 79 | type = "SD"; |
4101c16a | 80 | break; |
5c4e6f13 | 81 | case MMC_TYPE_SDIO: |
9eb3a94d | 82 | type = "SDIO"; |
5c4e6f13 | 83 | break; |
7310ece8 MM |
84 | case MMC_TYPE_SD_COMBO: |
85 | type = "SDcombo"; | |
86 | break; | |
9eb3a94d PO |
87 | default: |
88 | type = NULL; | |
4101c16a PO |
89 | } |
90 | ||
9eb3a94d | 91 | if (type) { |
7eff2e7a KS |
92 | retval = add_uevent_var(env, "MMC_TYPE=%s", type); |
93 | if (retval) | |
94 | return retval; | |
9eb3a94d | 95 | } |
4101c16a | 96 | |
7eff2e7a | 97 | retval = add_uevent_var(env, "MMC_NAME=%s", mmc_card_name(card)); |
6b0b6285 AW |
98 | if (retval) |
99 | return retval; | |
100 | ||
101 | /* | |
102 | * Request the mmc_block device. Note: that this is a direct request | |
103 | * for the module it carries no information as to what is inserted. | |
104 | */ | |
105 | retval = add_uevent_var(env, "MODALIAS=mmc:block"); | |
4101c16a | 106 | |
7eff2e7a | 107 | return retval; |
4101c16a PO |
108 | } |
109 | ||
96541bac UH |
110 | static int mmc_bus_probe(struct device *dev) |
111 | { | |
112 | struct mmc_driver *drv = to_mmc_driver(dev->driver); | |
113 | struct mmc_card *card = mmc_dev_to_card(dev); | |
114 | ||
115 | return drv->probe(card); | |
116 | } | |
117 | ||
118 | static int mmc_bus_remove(struct device *dev) | |
119 | { | |
120 | struct mmc_driver *drv = to_mmc_driver(dev->driver); | |
121 | struct mmc_card *card = mmc_dev_to_card(dev); | |
122 | ||
123 | drv->remove(card); | |
124 | ||
125 | return 0; | |
126 | } | |
127 | ||
76287748 UH |
128 | static void mmc_bus_shutdown(struct device *dev) |
129 | { | |
96541bac | 130 | struct mmc_driver *drv = to_mmc_driver(dev->driver); |
76287748 | 131 | struct mmc_card *card = mmc_dev_to_card(dev); |
6b086bde UH |
132 | struct mmc_host *host = card->host; |
133 | int ret; | |
76287748 | 134 | |
96541bac UH |
135 | if (dev->driver && drv->shutdown) |
136 | drv->shutdown(card); | |
6b086bde UH |
137 | |
138 | if (host->bus_ops->shutdown) { | |
139 | ret = host->bus_ops->shutdown(host); | |
140 | if (ret) | |
141 | pr_warn("%s: error %d during shutdown\n", | |
142 | mmc_hostname(host), ret); | |
143 | } | |
76287748 UH |
144 | } |
145 | ||
0dd1bfeb | 146 | #ifdef CONFIG_PM_SLEEP |
32d317c6 | 147 | static int mmc_bus_suspend(struct device *dev) |
4101c16a | 148 | { |
265cdc90 | 149 | struct mmc_card *card = mmc_dev_to_card(dev); |
986892ca UH |
150 | struct mmc_host *host = card->host; |
151 | int ret; | |
4101c16a | 152 | |
0967edc6 UH |
153 | ret = pm_generic_suspend(dev); |
154 | if (ret) | |
155 | return ret; | |
986892ca UH |
156 | |
157 | ret = host->bus_ops->suspend(host); | |
4101c16a PO |
158 | return ret; |
159 | } | |
160 | ||
161 | static int mmc_bus_resume(struct device *dev) | |
162 | { | |
265cdc90 | 163 | struct mmc_card *card = mmc_dev_to_card(dev); |
986892ca UH |
164 | struct mmc_host *host = card->host; |
165 | int ret; | |
166 | ||
167 | ret = host->bus_ops->resume(host); | |
168 | if (ret) | |
169 | pr_warn("%s: error %d during resume (card was removed?)\n", | |
170 | mmc_hostname(host), ret); | |
4101c16a | 171 | |
0967edc6 | 172 | ret = pm_generic_resume(dev); |
4101c16a PO |
173 | return ret; |
174 | } | |
0dd1bfeb | 175 | #endif |
4101c16a | 176 | |
162d6f98 | 177 | #ifdef CONFIG_PM |
516d5ccd OBC |
178 | static int mmc_runtime_suspend(struct device *dev) |
179 | { | |
180 | struct mmc_card *card = mmc_dev_to_card(dev); | |
12d01d0b | 181 | struct mmc_host *host = card->host; |
516d5ccd | 182 | |
5601aaf7 | 183 | return host->bus_ops->runtime_suspend(host); |
516d5ccd OBC |
184 | } |
185 | ||
186 | static int mmc_runtime_resume(struct device *dev) | |
187 | { | |
188 | struct mmc_card *card = mmc_dev_to_card(dev); | |
12d01d0b | 189 | struct mmc_host *host = card->host; |
516d5ccd | 190 | |
5601aaf7 | 191 | return host->bus_ops->runtime_resume(host); |
516d5ccd | 192 | } |
162d6f98 | 193 | #endif /* !CONFIG_PM */ |
32d317c6 | 194 | |
516d5ccd | 195 | static const struct dev_pm_ops mmc_bus_pm_ops = { |
2e42da59 | 196 | SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume, NULL) |
32d317c6 | 197 | SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_suspend, mmc_bus_resume) |
516d5ccd OBC |
198 | }; |
199 | ||
4101c16a PO |
200 | static struct bus_type mmc_bus_type = { |
201 | .name = "mmc", | |
f24fc57b | 202 | .dev_groups = mmc_dev_groups, |
4101c16a PO |
203 | .match = mmc_bus_match, |
204 | .uevent = mmc_bus_uevent, | |
96541bac UH |
205 | .probe = mmc_bus_probe, |
206 | .remove = mmc_bus_remove, | |
76287748 | 207 | .shutdown = mmc_bus_shutdown, |
32d317c6 | 208 | .pm = &mmc_bus_pm_ops, |
4101c16a PO |
209 | }; |
210 | ||
211 | int mmc_register_bus(void) | |
212 | { | |
213 | return bus_register(&mmc_bus_type); | |
214 | } | |
215 | ||
216 | void mmc_unregister_bus(void) | |
217 | { | |
218 | bus_unregister(&mmc_bus_type); | |
219 | } | |
220 | ||
221 | /** | |
222 | * mmc_register_driver - register a media driver | |
223 | * @drv: MMC media driver | |
224 | */ | |
96541bac | 225 | int mmc_register_driver(struct mmc_driver *drv) |
4101c16a | 226 | { |
96541bac UH |
227 | drv->drv.bus = &mmc_bus_type; |
228 | return driver_register(&drv->drv); | |
4101c16a | 229 | } |
96541bac | 230 | |
4101c16a PO |
231 | EXPORT_SYMBOL(mmc_register_driver); |
232 | ||
233 | /** | |
234 | * mmc_unregister_driver - unregister a media driver | |
235 | * @drv: MMC media driver | |
236 | */ | |
96541bac | 237 | void mmc_unregister_driver(struct mmc_driver *drv) |
4101c16a | 238 | { |
96541bac UH |
239 | drv->drv.bus = &mmc_bus_type; |
240 | driver_unregister(&drv->drv); | |
4101c16a | 241 | } |
96541bac | 242 | |
4101c16a PO |
243 | EXPORT_SYMBOL(mmc_unregister_driver); |
244 | ||
245 | static void mmc_release_card(struct device *dev) | |
246 | { | |
265cdc90 | 247 | struct mmc_card *card = mmc_dev_to_card(dev); |
4101c16a | 248 | |
1a632f8c PO |
249 | sdio_free_common_cis(card); |
250 | ||
8db580cc | 251 | kfree(card->info); |
759bdc7a | 252 | |
4101c16a PO |
253 | kfree(card); |
254 | } | |
255 | ||
256 | /* | |
257 | * Allocate and initialise a new MMC card structure. | |
258 | */ | |
51ec92e2 | 259 | struct mmc_card *mmc_alloc_card(struct mmc_host *host, struct device_type *type) |
4101c16a PO |
260 | { |
261 | struct mmc_card *card; | |
262 | ||
733cb1e4 | 263 | card = kzalloc(sizeof(struct mmc_card), GFP_KERNEL); |
4101c16a PO |
264 | if (!card) |
265 | return ERR_PTR(-ENOMEM); | |
266 | ||
4101c16a PO |
267 | card->host = host; |
268 | ||
269 | device_initialize(&card->dev); | |
270 | ||
271 | card->dev.parent = mmc_classdev(host); | |
272 | card->dev.bus = &mmc_bus_type; | |
273 | card->dev.release = mmc_release_card; | |
51ec92e2 | 274 | card->dev.type = type; |
4101c16a PO |
275 | |
276 | return card; | |
277 | } | |
278 | ||
279 | /* | |
280 | * Register a new MMC card with the driver model. | |
281 | */ | |
282 | int mmc_add_card(struct mmc_card *card) | |
283 | { | |
284 | int ret; | |
109b5bed | 285 | const char *type; |
6500c8ed SJ |
286 | const char *uhs_bus_speed_mode = ""; |
287 | static const char *const uhs_speeds[] = { | |
288 | [UHS_SDR12_BUS_SPEED] = "SDR12 ", | |
289 | [UHS_SDR25_BUS_SPEED] = "SDR25 ", | |
290 | [UHS_SDR50_BUS_SPEED] = "SDR50 ", | |
291 | [UHS_SDR104_BUS_SPEED] = "SDR104 ", | |
292 | [UHS_DDR50_BUS_SPEED] = "DDR50 ", | |
293 | }; | |
294 | ||
4101c16a | 295 | |
d1b26863 | 296 | dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca); |
4101c16a | 297 | |
109b5bed PO |
298 | switch (card->type) { |
299 | case MMC_TYPE_MMC: | |
300 | type = "MMC"; | |
301 | break; | |
302 | case MMC_TYPE_SD: | |
303 | type = "SD"; | |
3a303511 AN |
304 | if (mmc_card_blockaddr(card)) { |
305 | if (mmc_card_ext_capacity(card)) | |
306 | type = "SDXC"; | |
307 | else | |
308 | type = "SDHC"; | |
309 | } | |
109b5bed | 310 | break; |
5c4e6f13 PO |
311 | case MMC_TYPE_SDIO: |
312 | type = "SDIO"; | |
313 | break; | |
7310ece8 MM |
314 | case MMC_TYPE_SD_COMBO: |
315 | type = "SD-combo"; | |
316 | if (mmc_card_blockaddr(card)) | |
317 | type = "SDHC-combo"; | |
9bc21848 | 318 | break; |
109b5bed PO |
319 | default: |
320 | type = "?"; | |
321 | break; | |
322 | } | |
323 | ||
71ef1ea4 | 324 | if (mmc_card_uhs(card) && |
6500c8ed SJ |
325 | (card->sd_bus_speed < ARRAY_SIZE(uhs_speeds))) |
326 | uhs_bus_speed_mode = uhs_speeds[card->sd_bus_speed]; | |
327 | ||
af517150 | 328 | if (mmc_host_is_spi(card->host)) { |
a3c76eb9 | 329 | pr_info("%s: new %s%s%s card on SPI\n", |
af517150 | 330 | mmc_hostname(card->host), |
cdc99179 SJ |
331 | mmc_card_hs(card) ? "high speed " : "", |
332 | mmc_card_ddr52(card) ? "DDR " : "", | |
af517150 DB |
333 | type); |
334 | } else { | |
6500c8ed | 335 | pr_info("%s: new %s%s%s%s%s card at address %04x\n", |
af517150 | 336 | mmc_hostname(card->host), |
a303c531 | 337 | mmc_card_uhs(card) ? "ultra high speed " : |
cdc99179 | 338 | (mmc_card_hs(card) ? "high speed " : ""), |
0a5b6438 | 339 | mmc_card_hs400(card) ? "HS400 " : |
a4924c71 | 340 | (mmc_card_hs200(card) ? "HS200 " : ""), |
cdc99179 | 341 | mmc_card_ddr52(card) ? "DDR " : "", |
6500c8ed | 342 | uhs_bus_speed_mode, type, card->rca); |
af517150 | 343 | } |
109b5bed | 344 | |
f4b7f927 HS |
345 | #ifdef CONFIG_DEBUG_FS |
346 | mmc_add_card_debugfs(card); | |
347 | #endif | |
2220eedf | 348 | mmc_init_context_info(card->host); |
f4b7f927 | 349 | |
25185f3f SH |
350 | card->dev.of_node = mmc_of_find_child_device(card->host, 0); |
351 | ||
1a2727e9 VK |
352 | ret = device_add(&card->dev); |
353 | if (ret) | |
354 | return ret; | |
355 | ||
4101c16a PO |
356 | mmc_card_set_present(card); |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
361 | /* | |
362 | * Unregister a new MMC card with the driver model, and | |
363 | * (eventually) free it. | |
364 | */ | |
365 | void mmc_remove_card(struct mmc_card *card) | |
366 | { | |
f4b7f927 HS |
367 | #ifdef CONFIG_DEBUG_FS |
368 | mmc_remove_card_debugfs(card); | |
369 | #endif | |
370 | ||
4101c16a | 371 | if (mmc_card_present(card)) { |
af517150 | 372 | if (mmc_host_is_spi(card->host)) { |
a3c76eb9 | 373 | pr_info("%s: SPI card removed\n", |
af517150 DB |
374 | mmc_hostname(card->host)); |
375 | } else { | |
a3c76eb9 | 376 | pr_info("%s: card %04x removed\n", |
af517150 DB |
377 | mmc_hostname(card->host), card->rca); |
378 | } | |
4101c16a | 379 | device_del(&card->dev); |
25185f3f | 380 | of_node_put(card->dev.of_node); |
4101c16a PO |
381 | } |
382 | ||
383 | put_device(&card->dev); | |
384 | } | |
385 |