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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
14#include <linux/export.h>
15#include <linux/device.h>
16#include <linux/err.h>
17#include <linux/slab.h>
18#include <linux/stat.h>
19#include <linux/of.h>
20#include <linux/pm_runtime.h>
21
22#include <linux/mmc/card.h>
23#include <linux/mmc/host.h>
24
25#include "core.h"
26#include "sdio_cis.h"
27#include "bus.h"
28
29#define to_mmc_driver(d) container_of(d, struct mmc_driver, drv)
30
31static ssize_t type_show(struct device *dev,
32 struct device_attribute *attr, char *buf)
33{
34 struct mmc_card *card = mmc_dev_to_card(dev);
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");
41 case MMC_TYPE_SDIO:
42 return sprintf(buf, "SDIO\n");
43 case MMC_TYPE_SD_COMBO:
44 return sprintf(buf, "SDcombo\n");
45 default:
46 return -EFAULT;
47 }
48}
49static DEVICE_ATTR_RO(type);
50
51static struct attribute *mmc_dev_attrs[] = {
52 &dev_attr_type.attr,
53 NULL,
54};
55ATTRIBUTE_GROUPS(mmc_dev);
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 */
62static int mmc_bus_match(struct device *dev, struct device_driver *drv)
63{
64 return 1;
65}
66
67static int
68mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
69{
70 struct mmc_card *card = mmc_dev_to_card(dev);
71 const char *type;
72 int retval = 0;
73
74 switch (card->type) {
75 case MMC_TYPE_MMC:
76 type = "MMC";
77 break;
78 case MMC_TYPE_SD:
79 type = "SD";
80 break;
81 case MMC_TYPE_SDIO:
82 type = "SDIO";
83 break;
84 case MMC_TYPE_SD_COMBO:
85 type = "SDcombo";
86 break;
87 default:
88 type = NULL;
89 }
90
91 if (type) {
92 retval = add_uevent_var(env, "MMC_TYPE=%s", type);
93 if (retval)
94 return retval;
95 }
96
97 retval = add_uevent_var(env, "MMC_NAME=%s", mmc_card_name(card));
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");
106
107 return retval;
108}
109
110static 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
118static 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
128static void mmc_bus_shutdown(struct device *dev)
129{
130 struct mmc_driver *drv = to_mmc_driver(dev->driver);
131 struct mmc_card *card = mmc_dev_to_card(dev);
132 struct mmc_host *host = card->host;
133 int ret;
134
135 if (dev->driver && drv->shutdown)
136 drv->shutdown(card);
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 }
144}
145
146#ifdef CONFIG_PM_SLEEP
147static int mmc_bus_suspend(struct device *dev)
148{
149 struct mmc_card *card = mmc_dev_to_card(dev);
150 struct mmc_host *host = card->host;
151 int ret;
152
153 ret = pm_generic_suspend(dev);
154 if (ret)
155 return ret;
156
157 ret = host->bus_ops->suspend(host);
158 return ret;
159}
160
161static int mmc_bus_resume(struct device *dev)
162{
163 struct mmc_card *card = mmc_dev_to_card(dev);
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);
171
172 ret = pm_generic_resume(dev);
173 return ret;
174}
175#endif
176
177#ifdef CONFIG_PM
178static int mmc_runtime_suspend(struct device *dev)
179{
180 struct mmc_card *card = mmc_dev_to_card(dev);
181 struct mmc_host *host = card->host;
182
183 return host->bus_ops->runtime_suspend(host);
184}
185
186static int mmc_runtime_resume(struct device *dev)
187{
188 struct mmc_card *card = mmc_dev_to_card(dev);
189 struct mmc_host *host = card->host;
190
191 return host->bus_ops->runtime_resume(host);
192}
193#endif /* !CONFIG_PM */
194
195static const struct dev_pm_ops mmc_bus_pm_ops = {
196 SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume, NULL)
197 SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_suspend, mmc_bus_resume)
198};
199
200static struct bus_type mmc_bus_type = {
201 .name = "mmc",
202 .dev_groups = mmc_dev_groups,
203 .match = mmc_bus_match,
204 .uevent = mmc_bus_uevent,
205 .probe = mmc_bus_probe,
206 .remove = mmc_bus_remove,
207 .shutdown = mmc_bus_shutdown,
208 .pm = &mmc_bus_pm_ops,
209};
210
211int mmc_register_bus(void)
212{
213 return bus_register(&mmc_bus_type);
214}
215
216void 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 */
225int mmc_register_driver(struct mmc_driver *drv)
226{
227 drv->drv.bus = &mmc_bus_type;
228 return driver_register(&drv->drv);
229}
230
231EXPORT_SYMBOL(mmc_register_driver);
232
233/**
234 * mmc_unregister_driver - unregister a media driver
235 * @drv: MMC media driver
236 */
237void mmc_unregister_driver(struct mmc_driver *drv)
238{
239 drv->drv.bus = &mmc_bus_type;
240 driver_unregister(&drv->drv);
241}
242
243EXPORT_SYMBOL(mmc_unregister_driver);
244
245static void mmc_release_card(struct device *dev)
246{
247 struct mmc_card *card = mmc_dev_to_card(dev);
248
249 sdio_free_common_cis(card);
250
251 kfree(card->info);
252
253 kfree(card);
254}
255
256/*
257 * Allocate and initialise a new MMC card structure.
258 */
259struct mmc_card *mmc_alloc_card(struct mmc_host *host, struct device_type *type)
260{
261 struct mmc_card *card;
262
263 card = kzalloc(sizeof(struct mmc_card), GFP_KERNEL);
264 if (!card)
265 return ERR_PTR(-ENOMEM);
266
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;
274 card->dev.type = type;
275
276 return card;
277}
278
279/*
280 * Register a new MMC card with the driver model.
281 */
282int mmc_add_card(struct mmc_card *card)
283{
284 int ret;
285 const char *type;
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
295
296 dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca);
297
298 switch (card->type) {
299 case MMC_TYPE_MMC:
300 type = "MMC";
301 break;
302 case MMC_TYPE_SD:
303 type = "SD";
304 if (mmc_card_blockaddr(card)) {
305 if (mmc_card_ext_capacity(card))
306 type = "SDXC";
307 else
308 type = "SDHC";
309 }
310 break;
311 case MMC_TYPE_SDIO:
312 type = "SDIO";
313 break;
314 case MMC_TYPE_SD_COMBO:
315 type = "SD-combo";
316 if (mmc_card_blockaddr(card))
317 type = "SDHC-combo";
318 break;
319 default:
320 type = "?";
321 break;
322 }
323
324 if (mmc_card_uhs(card) &&
325 (card->sd_bus_speed < ARRAY_SIZE(uhs_speeds)))
326 uhs_bus_speed_mode = uhs_speeds[card->sd_bus_speed];
327
328 if (mmc_host_is_spi(card->host)) {
329 pr_info("%s: new %s%s%s card on SPI\n",
330 mmc_hostname(card->host),
331 mmc_card_hs(card) ? "high speed " : "",
332 mmc_card_ddr52(card) ? "DDR " : "",
333 type);
334 } else {
335 pr_info("%s: new %s%s%s%s%s card at address %04x\n",
336 mmc_hostname(card->host),
337 mmc_card_uhs(card) ? "ultra high speed " :
338 (mmc_card_hs(card) ? "high speed " : ""),
339 mmc_card_hs400(card) ? "HS400 " :
340 (mmc_card_hs200(card) ? "HS200 " : ""),
341 mmc_card_ddr52(card) ? "DDR " : "",
342 uhs_bus_speed_mode, type, card->rca);
343 }
344
345#ifdef CONFIG_DEBUG_FS
346 mmc_add_card_debugfs(card);
347#endif
348 mmc_init_context_info(card->host);
349
350 card->dev.of_node = mmc_of_find_child_device(card->host, 0);
351
352 device_enable_async_suspend(&card->dev);
353
354 ret = device_add(&card->dev);
355 if (ret)
356 return ret;
357
358 mmc_card_set_present(card);
359
360 return 0;
361}
362
363/*
364 * Unregister a new MMC card with the driver model, and
365 * (eventually) free it.
366 */
367void mmc_remove_card(struct mmc_card *card)
368{
369#ifdef CONFIG_DEBUG_FS
370 mmc_remove_card_debugfs(card);
371#endif
372
373 if (mmc_card_present(card)) {
374 if (mmc_host_is_spi(card->host)) {
375 pr_info("%s: SPI card removed\n",
376 mmc_hostname(card->host));
377 } else {
378 pr_info("%s: card %04x removed\n",
379 mmc_hostname(card->host), card->rca);
380 }
381 device_del(&card->dev);
382 of_node_put(card->dev.of_node);
383 }
384
385 put_device(&card->dev);
386}
387
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
14#include <linux/export.h>
15#include <linux/device.h>
16#include <linux/err.h>
17#include <linux/slab.h>
18#include <linux/stat.h>
19#include <linux/of.h>
20#include <linux/pm_runtime.h>
21
22#include <linux/mmc/card.h>
23#include <linux/mmc/host.h>
24
25#include "core.h"
26#include "card.h"
27#include "host.h"
28#include "sdio_cis.h"
29#include "bus.h"
30
31#define to_mmc_driver(d) container_of(d, struct mmc_driver, drv)
32
33static ssize_t type_show(struct device *dev,
34 struct device_attribute *attr, char *buf)
35{
36 struct mmc_card *card = mmc_dev_to_card(dev);
37
38 switch (card->type) {
39 case MMC_TYPE_MMC:
40 return sprintf(buf, "MMC\n");
41 case MMC_TYPE_SD:
42 return sprintf(buf, "SD\n");
43 case MMC_TYPE_SDIO:
44 return sprintf(buf, "SDIO\n");
45 case MMC_TYPE_SD_COMBO:
46 return sprintf(buf, "SDcombo\n");
47 default:
48 return -EFAULT;
49 }
50}
51static DEVICE_ATTR_RO(type);
52
53static struct attribute *mmc_dev_attrs[] = {
54 &dev_attr_type.attr,
55 NULL,
56};
57ATTRIBUTE_GROUPS(mmc_dev);
58
59/*
60 * This currently matches any MMC driver to any MMC card - drivers
61 * themselves make the decision whether to drive this card in their
62 * probe method.
63 */
64static int mmc_bus_match(struct device *dev, struct device_driver *drv)
65{
66 return 1;
67}
68
69static int
70mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
71{
72 struct mmc_card *card = mmc_dev_to_card(dev);
73 const char *type;
74 int retval = 0;
75
76 switch (card->type) {
77 case MMC_TYPE_MMC:
78 type = "MMC";
79 break;
80 case MMC_TYPE_SD:
81 type = "SD";
82 break;
83 case MMC_TYPE_SDIO:
84 type = "SDIO";
85 break;
86 case MMC_TYPE_SD_COMBO:
87 type = "SDcombo";
88 break;
89 default:
90 type = NULL;
91 }
92
93 if (type) {
94 retval = add_uevent_var(env, "MMC_TYPE=%s", type);
95 if (retval)
96 return retval;
97 }
98
99 retval = add_uevent_var(env, "MMC_NAME=%s", mmc_card_name(card));
100 if (retval)
101 return retval;
102
103 /*
104 * Request the mmc_block device. Note: that this is a direct request
105 * for the module it carries no information as to what is inserted.
106 */
107 retval = add_uevent_var(env, "MODALIAS=mmc:block");
108
109 return retval;
110}
111
112static int mmc_bus_probe(struct device *dev)
113{
114 struct mmc_driver *drv = to_mmc_driver(dev->driver);
115 struct mmc_card *card = mmc_dev_to_card(dev);
116
117 return drv->probe(card);
118}
119
120static int mmc_bus_remove(struct device *dev)
121{
122 struct mmc_driver *drv = to_mmc_driver(dev->driver);
123 struct mmc_card *card = mmc_dev_to_card(dev);
124
125 drv->remove(card);
126
127 return 0;
128}
129
130static void mmc_bus_shutdown(struct device *dev)
131{
132 struct mmc_driver *drv = to_mmc_driver(dev->driver);
133 struct mmc_card *card = mmc_dev_to_card(dev);
134 struct mmc_host *host = card->host;
135 int ret;
136
137 if (dev->driver && drv->shutdown)
138 drv->shutdown(card);
139
140 if (host->bus_ops->shutdown) {
141 ret = host->bus_ops->shutdown(host);
142 if (ret)
143 pr_warn("%s: error %d during shutdown\n",
144 mmc_hostname(host), ret);
145 }
146}
147
148#ifdef CONFIG_PM_SLEEP
149static int mmc_bus_suspend(struct device *dev)
150{
151 struct mmc_card *card = mmc_dev_to_card(dev);
152 struct mmc_host *host = card->host;
153 int ret;
154
155 ret = pm_generic_suspend(dev);
156 if (ret)
157 return ret;
158
159 ret = host->bus_ops->suspend(host);
160 if (ret)
161 pm_generic_resume(dev);
162
163 return ret;
164}
165
166static int mmc_bus_resume(struct device *dev)
167{
168 struct mmc_card *card = mmc_dev_to_card(dev);
169 struct mmc_host *host = card->host;
170 int ret;
171
172 ret = host->bus_ops->resume(host);
173 if (ret)
174 pr_warn("%s: error %d during resume (card was removed?)\n",
175 mmc_hostname(host), ret);
176
177 ret = pm_generic_resume(dev);
178 return ret;
179}
180#endif
181
182#ifdef CONFIG_PM
183static int mmc_runtime_suspend(struct device *dev)
184{
185 struct mmc_card *card = mmc_dev_to_card(dev);
186 struct mmc_host *host = card->host;
187
188 return host->bus_ops->runtime_suspend(host);
189}
190
191static int mmc_runtime_resume(struct device *dev)
192{
193 struct mmc_card *card = mmc_dev_to_card(dev);
194 struct mmc_host *host = card->host;
195
196 return host->bus_ops->runtime_resume(host);
197}
198#endif /* !CONFIG_PM */
199
200static const struct dev_pm_ops mmc_bus_pm_ops = {
201 SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume, NULL)
202 SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_suspend, mmc_bus_resume)
203};
204
205static struct bus_type mmc_bus_type = {
206 .name = "mmc",
207 .dev_groups = mmc_dev_groups,
208 .match = mmc_bus_match,
209 .uevent = mmc_bus_uevent,
210 .probe = mmc_bus_probe,
211 .remove = mmc_bus_remove,
212 .shutdown = mmc_bus_shutdown,
213 .pm = &mmc_bus_pm_ops,
214};
215
216int mmc_register_bus(void)
217{
218 return bus_register(&mmc_bus_type);
219}
220
221void mmc_unregister_bus(void)
222{
223 bus_unregister(&mmc_bus_type);
224}
225
226/**
227 * mmc_register_driver - register a media driver
228 * @drv: MMC media driver
229 */
230int mmc_register_driver(struct mmc_driver *drv)
231{
232 drv->drv.bus = &mmc_bus_type;
233 return driver_register(&drv->drv);
234}
235
236EXPORT_SYMBOL(mmc_register_driver);
237
238/**
239 * mmc_unregister_driver - unregister a media driver
240 * @drv: MMC media driver
241 */
242void mmc_unregister_driver(struct mmc_driver *drv)
243{
244 drv->drv.bus = &mmc_bus_type;
245 driver_unregister(&drv->drv);
246}
247
248EXPORT_SYMBOL(mmc_unregister_driver);
249
250static void mmc_release_card(struct device *dev)
251{
252 struct mmc_card *card = mmc_dev_to_card(dev);
253
254 sdio_free_common_cis(card);
255
256 kfree(card->info);
257
258 kfree(card);
259}
260
261/*
262 * Allocate and initialise a new MMC card structure.
263 */
264struct mmc_card *mmc_alloc_card(struct mmc_host *host, struct device_type *type)
265{
266 struct mmc_card *card;
267
268 card = kzalloc(sizeof(struct mmc_card), GFP_KERNEL);
269 if (!card)
270 return ERR_PTR(-ENOMEM);
271
272 card->host = host;
273
274 device_initialize(&card->dev);
275
276 card->dev.parent = mmc_classdev(host);
277 card->dev.bus = &mmc_bus_type;
278 card->dev.release = mmc_release_card;
279 card->dev.type = type;
280
281 return card;
282}
283
284/*
285 * Register a new MMC card with the driver model.
286 */
287int mmc_add_card(struct mmc_card *card)
288{
289 int ret;
290 const char *type;
291 const char *uhs_bus_speed_mode = "";
292 static const char *const uhs_speeds[] = {
293 [UHS_SDR12_BUS_SPEED] = "SDR12 ",
294 [UHS_SDR25_BUS_SPEED] = "SDR25 ",
295 [UHS_SDR50_BUS_SPEED] = "SDR50 ",
296 [UHS_SDR104_BUS_SPEED] = "SDR104 ",
297 [UHS_DDR50_BUS_SPEED] = "DDR50 ",
298 };
299
300
301 dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca);
302
303 switch (card->type) {
304 case MMC_TYPE_MMC:
305 type = "MMC";
306 break;
307 case MMC_TYPE_SD:
308 type = "SD";
309 if (mmc_card_blockaddr(card)) {
310 if (mmc_card_ext_capacity(card))
311 type = "SDXC";
312 else
313 type = "SDHC";
314 }
315 break;
316 case MMC_TYPE_SDIO:
317 type = "SDIO";
318 break;
319 case MMC_TYPE_SD_COMBO:
320 type = "SD-combo";
321 if (mmc_card_blockaddr(card))
322 type = "SDHC-combo";
323 break;
324 default:
325 type = "?";
326 break;
327 }
328
329 if (mmc_card_uhs(card) &&
330 (card->sd_bus_speed < ARRAY_SIZE(uhs_speeds)))
331 uhs_bus_speed_mode = uhs_speeds[card->sd_bus_speed];
332
333 if (mmc_host_is_spi(card->host)) {
334 pr_info("%s: new %s%s%s card on SPI\n",
335 mmc_hostname(card->host),
336 mmc_card_hs(card) ? "high speed " : "",
337 mmc_card_ddr52(card) ? "DDR " : "",
338 type);
339 } else {
340 pr_info("%s: new %s%s%s%s%s%s card at address %04x\n",
341 mmc_hostname(card->host),
342 mmc_card_uhs(card) ? "ultra high speed " :
343 (mmc_card_hs(card) ? "high speed " : ""),
344 mmc_card_hs400(card) ? "HS400 " :
345 (mmc_card_hs200(card) ? "HS200 " : ""),
346 mmc_card_hs400es(card) ? "Enhanced strobe " : "",
347 mmc_card_ddr52(card) ? "DDR " : "",
348 uhs_bus_speed_mode, type, card->rca);
349 }
350
351#ifdef CONFIG_DEBUG_FS
352 mmc_add_card_debugfs(card);
353#endif
354 card->dev.of_node = mmc_of_find_child_device(card->host, 0);
355
356 device_enable_async_suspend(&card->dev);
357
358 ret = device_add(&card->dev);
359 if (ret)
360 return ret;
361
362 mmc_card_set_present(card);
363
364 return 0;
365}
366
367/*
368 * Unregister a new MMC card with the driver model, and
369 * (eventually) free it.
370 */
371void mmc_remove_card(struct mmc_card *card)
372{
373 struct mmc_host *host = card->host;
374
375#ifdef CONFIG_DEBUG_FS
376 mmc_remove_card_debugfs(card);
377#endif
378
379 if (host->cqe_enabled) {
380 host->cqe_ops->cqe_disable(host);
381 host->cqe_enabled = false;
382 }
383
384 if (mmc_card_present(card)) {
385 if (mmc_host_is_spi(card->host)) {
386 pr_info("%s: SPI card removed\n",
387 mmc_hostname(card->host));
388 } else {
389 pr_info("%s: card %04x removed\n",
390 mmc_hostname(card->host), card->rca);
391 }
392 device_del(&card->dev);
393 of_node_put(card->dev.of_node);
394 }
395
396 put_device(&card->dev);
397}
398