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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// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/drivers/mmc/core/bus.c
4 *
5 * Copyright (C) 2003 Russell King, All Rights Reserved.
6 * Copyright (C) 2007 Pierre Ossman
7 *
8 * MMC card bus driver model
9 */
10
11#include <linux/export.h>
12#include <linux/device.h>
13#include <linux/err.h>
14#include <linux/slab.h>
15#include <linux/stat.h>
16#include <linux/of.h>
17#include <linux/pm_runtime.h>
18
19#include <linux/mmc/card.h>
20#include <linux/mmc/host.h>
21
22#include "core.h"
23#include "card.h"
24#include "host.h"
25#include "sdio_cis.h"
26#include "bus.h"
27
28#define to_mmc_driver(d) container_of(d, struct mmc_driver, drv)
29
30static ssize_t type_show(struct device *dev,
31 struct device_attribute *attr, char *buf)
32{
33 struct mmc_card *card = mmc_dev_to_card(dev);
34
35 switch (card->type) {
36 case MMC_TYPE_MMC:
37 return sprintf(buf, "MMC\n");
38 case MMC_TYPE_SD:
39 return sprintf(buf, "SD\n");
40 case MMC_TYPE_SDIO:
41 return sprintf(buf, "SDIO\n");
42 case MMC_TYPE_SD_COMBO:
43 return sprintf(buf, "SDcombo\n");
44 default:
45 return -EFAULT;
46 }
47}
48static DEVICE_ATTR_RO(type);
49
50static struct attribute *mmc_dev_attrs[] = {
51 &dev_attr_type.attr,
52 NULL,
53};
54ATTRIBUTE_GROUPS(mmc_dev);
55
56/*
57 * This currently matches any MMC driver to any MMC card - drivers
58 * themselves make the decision whether to drive this card in their
59 * probe method.
60 */
61static int mmc_bus_match(struct device *dev, struct device_driver *drv)
62{
63 return 1;
64}
65
66static int
67mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
68{
69 struct mmc_card *card = mmc_dev_to_card(dev);
70 const char *type;
71 unsigned int i;
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 if (card->type == MMC_TYPE_SDIO || card->type == MMC_TYPE_SD_COMBO) {
98 retval = add_uevent_var(env, "SDIO_ID=%04X:%04X",
99 card->cis.vendor, card->cis.device);
100 if (retval)
101 return retval;
102
103 retval = add_uevent_var(env, "SDIO_REVISION=%u.%u",
104 card->major_rev, card->minor_rev);
105 if (retval)
106 return retval;
107
108 for (i = 0; i < card->num_info; i++) {
109 retval = add_uevent_var(env, "SDIO_INFO%u=%s", i+1, card->info[i]);
110 if (retval)
111 return retval;
112 }
113 }
114
115 /*
116 * SDIO (non-combo) cards are not handled by mmc_block driver and do not
117 * have accessible CID register which used by mmc_card_name() function.
118 */
119 if (card->type == MMC_TYPE_SDIO)
120 return 0;
121
122 retval = add_uevent_var(env, "MMC_NAME=%s", mmc_card_name(card));
123 if (retval)
124 return retval;
125
126 /*
127 * Request the mmc_block device. Note: that this is a direct request
128 * for the module it carries no information as to what is inserted.
129 */
130 retval = add_uevent_var(env, "MODALIAS=mmc:block");
131
132 return retval;
133}
134
135static int mmc_bus_probe(struct device *dev)
136{
137 struct mmc_driver *drv = to_mmc_driver(dev->driver);
138 struct mmc_card *card = mmc_dev_to_card(dev);
139
140 return drv->probe(card);
141}
142
143static int mmc_bus_remove(struct device *dev)
144{
145 struct mmc_driver *drv = to_mmc_driver(dev->driver);
146 struct mmc_card *card = mmc_dev_to_card(dev);
147
148 drv->remove(card);
149
150 return 0;
151}
152
153static void mmc_bus_shutdown(struct device *dev)
154{
155 struct mmc_driver *drv = to_mmc_driver(dev->driver);
156 struct mmc_card *card = mmc_dev_to_card(dev);
157 struct mmc_host *host = card->host;
158 int ret;
159
160 if (dev->driver && drv->shutdown)
161 drv->shutdown(card);
162
163 if (host->bus_ops->shutdown) {
164 ret = host->bus_ops->shutdown(host);
165 if (ret)
166 pr_warn("%s: error %d during shutdown\n",
167 mmc_hostname(host), ret);
168 }
169}
170
171#ifdef CONFIG_PM_SLEEP
172static int mmc_bus_suspend(struct device *dev)
173{
174 struct mmc_card *card = mmc_dev_to_card(dev);
175 struct mmc_host *host = card->host;
176 int ret;
177
178 ret = pm_generic_suspend(dev);
179 if (ret)
180 return ret;
181
182 ret = host->bus_ops->suspend(host);
183 if (ret)
184 pm_generic_resume(dev);
185
186 return ret;
187}
188
189static int mmc_bus_resume(struct device *dev)
190{
191 struct mmc_card *card = mmc_dev_to_card(dev);
192 struct mmc_host *host = card->host;
193 int ret;
194
195 ret = host->bus_ops->resume(host);
196 if (ret)
197 pr_warn("%s: error %d during resume (card was removed?)\n",
198 mmc_hostname(host), ret);
199
200 ret = pm_generic_resume(dev);
201 return ret;
202}
203#endif
204
205#ifdef CONFIG_PM
206static int mmc_runtime_suspend(struct device *dev)
207{
208 struct mmc_card *card = mmc_dev_to_card(dev);
209 struct mmc_host *host = card->host;
210
211 return host->bus_ops->runtime_suspend(host);
212}
213
214static int mmc_runtime_resume(struct device *dev)
215{
216 struct mmc_card *card = mmc_dev_to_card(dev);
217 struct mmc_host *host = card->host;
218
219 return host->bus_ops->runtime_resume(host);
220}
221#endif /* !CONFIG_PM */
222
223static const struct dev_pm_ops mmc_bus_pm_ops = {
224 SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume, NULL)
225 SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_suspend, mmc_bus_resume)
226};
227
228static struct bus_type mmc_bus_type = {
229 .name = "mmc",
230 .dev_groups = mmc_dev_groups,
231 .match = mmc_bus_match,
232 .uevent = mmc_bus_uevent,
233 .probe = mmc_bus_probe,
234 .remove = mmc_bus_remove,
235 .shutdown = mmc_bus_shutdown,
236 .pm = &mmc_bus_pm_ops,
237};
238
239int mmc_register_bus(void)
240{
241 return bus_register(&mmc_bus_type);
242}
243
244void mmc_unregister_bus(void)
245{
246 bus_unregister(&mmc_bus_type);
247}
248
249/**
250 * mmc_register_driver - register a media driver
251 * @drv: MMC media driver
252 */
253int mmc_register_driver(struct mmc_driver *drv)
254{
255 drv->drv.bus = &mmc_bus_type;
256 return driver_register(&drv->drv);
257}
258
259EXPORT_SYMBOL(mmc_register_driver);
260
261/**
262 * mmc_unregister_driver - unregister a media driver
263 * @drv: MMC media driver
264 */
265void mmc_unregister_driver(struct mmc_driver *drv)
266{
267 drv->drv.bus = &mmc_bus_type;
268 driver_unregister(&drv->drv);
269}
270
271EXPORT_SYMBOL(mmc_unregister_driver);
272
273static void mmc_release_card(struct device *dev)
274{
275 struct mmc_card *card = mmc_dev_to_card(dev);
276
277 sdio_free_common_cis(card);
278
279 kfree(card->info);
280
281 kfree(card);
282}
283
284/*
285 * Allocate and initialise a new MMC card structure.
286 */
287struct mmc_card *mmc_alloc_card(struct mmc_host *host, struct device_type *type)
288{
289 struct mmc_card *card;
290
291 card = kzalloc(sizeof(struct mmc_card), GFP_KERNEL);
292 if (!card)
293 return ERR_PTR(-ENOMEM);
294
295 card->host = host;
296
297 device_initialize(&card->dev);
298
299 card->dev.parent = mmc_classdev(host);
300 card->dev.bus = &mmc_bus_type;
301 card->dev.release = mmc_release_card;
302 card->dev.type = type;
303
304 return card;
305}
306
307/*
308 * Register a new MMC card with the driver model.
309 */
310int mmc_add_card(struct mmc_card *card)
311{
312 int ret;
313 const char *type;
314 const char *uhs_bus_speed_mode = "";
315 static const char *const uhs_speeds[] = {
316 [UHS_SDR12_BUS_SPEED] = "SDR12 ",
317 [UHS_SDR25_BUS_SPEED] = "SDR25 ",
318 [UHS_SDR50_BUS_SPEED] = "SDR50 ",
319 [UHS_SDR104_BUS_SPEED] = "SDR104 ",
320 [UHS_DDR50_BUS_SPEED] = "DDR50 ",
321 };
322
323
324 dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca);
325
326 switch (card->type) {
327 case MMC_TYPE_MMC:
328 type = "MMC";
329 break;
330 case MMC_TYPE_SD:
331 type = "SD";
332 if (mmc_card_blockaddr(card)) {
333 if (mmc_card_ext_capacity(card))
334 type = "SDXC";
335 else
336 type = "SDHC";
337 }
338 break;
339 case MMC_TYPE_SDIO:
340 type = "SDIO";
341 break;
342 case MMC_TYPE_SD_COMBO:
343 type = "SD-combo";
344 if (mmc_card_blockaddr(card))
345 type = "SDHC-combo";
346 break;
347 default:
348 type = "?";
349 break;
350 }
351
352 if (mmc_card_uhs(card) &&
353 (card->sd_bus_speed < ARRAY_SIZE(uhs_speeds)))
354 uhs_bus_speed_mode = uhs_speeds[card->sd_bus_speed];
355
356 if (mmc_host_is_spi(card->host)) {
357 pr_info("%s: new %s%s%s card on SPI\n",
358 mmc_hostname(card->host),
359 mmc_card_hs(card) ? "high speed " : "",
360 mmc_card_ddr52(card) ? "DDR " : "",
361 type);
362 } else {
363 pr_info("%s: new %s%s%s%s%s%s card at address %04x\n",
364 mmc_hostname(card->host),
365 mmc_card_uhs(card) ? "ultra high speed " :
366 (mmc_card_hs(card) ? "high speed " : ""),
367 mmc_card_hs400(card) ? "HS400 " :
368 (mmc_card_hs200(card) ? "HS200 " : ""),
369 mmc_card_hs400es(card) ? "Enhanced strobe " : "",
370 mmc_card_ddr52(card) ? "DDR " : "",
371 uhs_bus_speed_mode, type, card->rca);
372 }
373
374#ifdef CONFIG_DEBUG_FS
375 mmc_add_card_debugfs(card);
376#endif
377 card->dev.of_node = mmc_of_find_child_device(card->host, 0);
378
379 device_enable_async_suspend(&card->dev);
380
381 ret = device_add(&card->dev);
382 if (ret)
383 return ret;
384
385 mmc_card_set_present(card);
386
387 return 0;
388}
389
390/*
391 * Unregister a new MMC card with the driver model, and
392 * (eventually) free it.
393 */
394void mmc_remove_card(struct mmc_card *card)
395{
396 struct mmc_host *host = card->host;
397
398#ifdef CONFIG_DEBUG_FS
399 mmc_remove_card_debugfs(card);
400#endif
401
402 if (mmc_card_present(card)) {
403 if (mmc_host_is_spi(card->host)) {
404 pr_info("%s: SPI card removed\n",
405 mmc_hostname(card->host));
406 } else {
407 pr_info("%s: card %04x removed\n",
408 mmc_hostname(card->host), card->rca);
409 }
410 device_del(&card->dev);
411 of_node_put(card->dev.of_node);
412 }
413
414 if (host->cqe_enabled) {
415 host->cqe_ops->cqe_disable(host);
416 host->cqe_enabled = false;
417 }
418
419 put_device(&card->dev);
420}