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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#include <linux/sysfs.h>
19
20#include <linux/mmc/card.h>
21#include <linux/mmc/host.h>
22
23#include "core.h"
24#include "card.h"
25#include "host.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 sysfs_emit(buf, "MMC\n");
39 case MMC_TYPE_SD:
40 return sysfs_emit(buf, "SD\n");
41 case MMC_TYPE_SDIO:
42 return sysfs_emit(buf, "SDIO\n");
43 case MMC_TYPE_SD_COMBO:
44 return sysfs_emit(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
57static int
58mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
59{
60 struct mmc_card *card = mmc_dev_to_card(dev);
61 const char *type;
62 unsigned int i;
63 int retval = 0;
64
65 switch (card->type) {
66 case MMC_TYPE_MMC:
67 type = "MMC";
68 break;
69 case MMC_TYPE_SD:
70 type = "SD";
71 break;
72 case MMC_TYPE_SDIO:
73 type = "SDIO";
74 break;
75 case MMC_TYPE_SD_COMBO:
76 type = "SDcombo";
77 break;
78 default:
79 type = NULL;
80 }
81
82 if (type) {
83 retval = add_uevent_var(env, "MMC_TYPE=%s", type);
84 if (retval)
85 return retval;
86 }
87
88 if (mmc_card_sdio(card) || mmc_card_sd_combo(card)) {
89 retval = add_uevent_var(env, "SDIO_ID=%04X:%04X",
90 card->cis.vendor, card->cis.device);
91 if (retval)
92 return retval;
93
94 retval = add_uevent_var(env, "SDIO_REVISION=%u.%u",
95 card->major_rev, card->minor_rev);
96 if (retval)
97 return retval;
98
99 for (i = 0; i < card->num_info; i++) {
100 retval = add_uevent_var(env, "SDIO_INFO%u=%s", i+1, card->info[i]);
101 if (retval)
102 return retval;
103 }
104 }
105
106 /*
107 * SDIO (non-combo) cards are not handled by mmc_block driver and do not
108 * have accessible CID register which used by mmc_card_name() function.
109 */
110 if (mmc_card_sdio(card))
111 return 0;
112
113 retval = add_uevent_var(env, "MMC_NAME=%s", mmc_card_name(card));
114 if (retval)
115 return retval;
116
117 /*
118 * Request the mmc_block device. Note: that this is a direct request
119 * for the module it carries no information as to what is inserted.
120 */
121 retval = add_uevent_var(env, "MODALIAS=mmc:block");
122
123 return retval;
124}
125
126static int mmc_bus_probe(struct device *dev)
127{
128 struct mmc_driver *drv = to_mmc_driver(dev->driver);
129 struct mmc_card *card = mmc_dev_to_card(dev);
130
131 return drv->probe(card);
132}
133
134static void mmc_bus_remove(struct device *dev)
135{
136 struct mmc_driver *drv = to_mmc_driver(dev->driver);
137 struct mmc_card *card = mmc_dev_to_card(dev);
138
139 drv->remove(card);
140}
141
142static void mmc_bus_shutdown(struct device *dev)
143{
144 struct mmc_driver *drv = to_mmc_driver(dev->driver);
145 struct mmc_card *card = mmc_dev_to_card(dev);
146 struct mmc_host *host = card->host;
147 int ret;
148
149 if (dev->driver && drv->shutdown)
150 drv->shutdown(card);
151
152 if (host->bus_ops->shutdown) {
153 ret = host->bus_ops->shutdown(host);
154 if (ret)
155 pr_warn("%s: error %d during shutdown\n",
156 mmc_hostname(host), ret);
157 }
158}
159
160#ifdef CONFIG_PM_SLEEP
161static int mmc_bus_suspend(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 = pm_generic_suspend(dev);
168 if (ret)
169 return ret;
170
171 ret = host->bus_ops->suspend(host);
172 if (ret)
173 pm_generic_resume(dev);
174
175 return ret;
176}
177
178static int mmc_bus_resume(struct device *dev)
179{
180 struct mmc_card *card = mmc_dev_to_card(dev);
181 struct mmc_host *host = card->host;
182 int ret;
183
184 ret = host->bus_ops->resume(host);
185 if (ret)
186 pr_warn("%s: error %d during resume (card was removed?)\n",
187 mmc_hostname(host), ret);
188
189 ret = pm_generic_resume(dev);
190 return ret;
191}
192#endif
193
194#ifdef CONFIG_PM
195static int mmc_runtime_suspend(struct device *dev)
196{
197 struct mmc_card *card = mmc_dev_to_card(dev);
198 struct mmc_host *host = card->host;
199
200 return host->bus_ops->runtime_suspend(host);
201}
202
203static int mmc_runtime_resume(struct device *dev)
204{
205 struct mmc_card *card = mmc_dev_to_card(dev);
206 struct mmc_host *host = card->host;
207
208 return host->bus_ops->runtime_resume(host);
209}
210#endif /* !CONFIG_PM */
211
212static const struct dev_pm_ops mmc_bus_pm_ops = {
213 SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume, NULL)
214 SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_suspend, mmc_bus_resume)
215};
216
217static struct bus_type mmc_bus_type = {
218 .name = "mmc",
219 .dev_groups = mmc_dev_groups,
220 .uevent = mmc_bus_uevent,
221 .probe = mmc_bus_probe,
222 .remove = mmc_bus_remove,
223 .shutdown = mmc_bus_shutdown,
224 .pm = &mmc_bus_pm_ops,
225};
226
227int mmc_register_bus(void)
228{
229 return bus_register(&mmc_bus_type);
230}
231
232void mmc_unregister_bus(void)
233{
234 bus_unregister(&mmc_bus_type);
235}
236
237/**
238 * mmc_register_driver - register a media driver
239 * @drv: MMC media driver
240 */
241int mmc_register_driver(struct mmc_driver *drv)
242{
243 drv->drv.bus = &mmc_bus_type;
244 return driver_register(&drv->drv);
245}
246
247EXPORT_SYMBOL(mmc_register_driver);
248
249/**
250 * mmc_unregister_driver - unregister a media driver
251 * @drv: MMC media driver
252 */
253void mmc_unregister_driver(struct mmc_driver *drv)
254{
255 drv->drv.bus = &mmc_bus_type;
256 driver_unregister(&drv->drv);
257}
258
259EXPORT_SYMBOL(mmc_unregister_driver);
260
261static void mmc_release_card(struct device *dev)
262{
263 struct mmc_card *card = mmc_dev_to_card(dev);
264
265 sdio_free_common_cis(card);
266
267 kfree(card->info);
268
269 kfree(card);
270}
271
272/*
273 * Allocate and initialise a new MMC card structure.
274 */
275struct mmc_card *mmc_alloc_card(struct mmc_host *host, struct device_type *type)
276{
277 struct mmc_card *card;
278
279 card = kzalloc(sizeof(struct mmc_card), GFP_KERNEL);
280 if (!card)
281 return ERR_PTR(-ENOMEM);
282
283 card->host = host;
284
285 device_initialize(&card->dev);
286
287 card->dev.parent = mmc_classdev(host);
288 card->dev.bus = &mmc_bus_type;
289 card->dev.release = mmc_release_card;
290 card->dev.type = type;
291
292 return card;
293}
294
295/*
296 * Register a new MMC card with the driver model.
297 */
298int mmc_add_card(struct mmc_card *card)
299{
300 int ret;
301 const char *type;
302 const char *uhs_bus_speed_mode = "";
303 static const char *const uhs_speeds[] = {
304 [UHS_SDR12_BUS_SPEED] = "SDR12 ",
305 [UHS_SDR25_BUS_SPEED] = "SDR25 ",
306 [UHS_SDR50_BUS_SPEED] = "SDR50 ",
307 [UHS_SDR104_BUS_SPEED] = "SDR104 ",
308 [UHS_DDR50_BUS_SPEED] = "DDR50 ",
309 };
310
311
312 dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca);
313
314 switch (card->type) {
315 case MMC_TYPE_MMC:
316 type = "MMC";
317 break;
318 case MMC_TYPE_SD:
319 type = "SD";
320 if (mmc_card_blockaddr(card)) {
321 if (mmc_card_ext_capacity(card))
322 type = "SDXC";
323 else
324 type = "SDHC";
325 }
326 break;
327 case MMC_TYPE_SDIO:
328 type = "SDIO";
329 break;
330 case MMC_TYPE_SD_COMBO:
331 type = "SD-combo";
332 if (mmc_card_blockaddr(card))
333 type = "SDHC-combo";
334 break;
335 default:
336 type = "?";
337 break;
338 }
339
340 if (mmc_card_uhs(card) &&
341 (card->sd_bus_speed < ARRAY_SIZE(uhs_speeds)))
342 uhs_bus_speed_mode = uhs_speeds[card->sd_bus_speed];
343
344 if (mmc_host_is_spi(card->host)) {
345 pr_info("%s: new %s%s%s card on SPI\n",
346 mmc_hostname(card->host),
347 mmc_card_hs(card) ? "high speed " : "",
348 mmc_card_ddr52(card) ? "DDR " : "",
349 type);
350 } else {
351 pr_info("%s: new %s%s%s%s%s%s card at address %04x\n",
352 mmc_hostname(card->host),
353 mmc_card_uhs(card) ? "ultra high speed " :
354 (mmc_card_hs(card) ? "high speed " : ""),
355 mmc_card_hs400(card) ? "HS400 " :
356 (mmc_card_hs200(card) ? "HS200 " : ""),
357 mmc_card_hs400es(card) ? "Enhanced strobe " : "",
358 mmc_card_ddr52(card) ? "DDR " : "",
359 uhs_bus_speed_mode, type, card->rca);
360 }
361
362 mmc_add_card_debugfs(card);
363 card->dev.of_node = mmc_of_find_child_device(card->host, 0);
364
365 device_enable_async_suspend(&card->dev);
366
367 ret = device_add(&card->dev);
368 if (ret)
369 return ret;
370
371 mmc_card_set_present(card);
372
373 return 0;
374}
375
376/*
377 * Unregister a new MMC card with the driver model, and
378 * (eventually) free it.
379 */
380void mmc_remove_card(struct mmc_card *card)
381{
382 struct mmc_host *host = card->host;
383
384 mmc_remove_card_debugfs(card);
385
386 if (mmc_card_present(card)) {
387 if (mmc_host_is_spi(card->host)) {
388 pr_info("%s: SPI card removed\n",
389 mmc_hostname(card->host));
390 } else {
391 pr_info("%s: card %04x removed\n",
392 mmc_hostname(card->host), card->rca);
393 }
394 device_del(&card->dev);
395 of_node_put(card->dev.of_node);
396 }
397
398 if (host->cqe_enabled) {
399 host->cqe_ops->cqe_disable(host);
400 host->cqe_enabled = false;
401 }
402
403 put_device(&card->dev);
404}