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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/pm_runtime.h>
20
21#include <linux/mmc/card.h>
22#include <linux/mmc/host.h>
23
24#include "core.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 mmc_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}
48
49static struct device_attribute mmc_dev_attrs[] = {
50 __ATTR(type, S_IRUGO, mmc_type_show, NULL),
51 __ATTR_NULL,
52};
53
54/*
55 * This currently matches any MMC driver to any MMC card - drivers
56 * themselves make the decision whether to drive this card in their
57 * probe method.
58 */
59static int mmc_bus_match(struct device *dev, struct device_driver *drv)
60{
61 return 1;
62}
63
64static int
65mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
66{
67 struct mmc_card *card = mmc_dev_to_card(dev);
68 const char *type;
69 int retval = 0;
70
71 switch (card->type) {
72 case MMC_TYPE_MMC:
73 type = "MMC";
74 break;
75 case MMC_TYPE_SD:
76 type = "SD";
77 break;
78 case MMC_TYPE_SDIO:
79 type = "SDIO";
80 break;
81 case MMC_TYPE_SD_COMBO:
82 type = "SDcombo";
83 break;
84 default:
85 type = NULL;
86 }
87
88 if (type) {
89 retval = add_uevent_var(env, "MMC_TYPE=%s", type);
90 if (retval)
91 return retval;
92 }
93
94 retval = add_uevent_var(env, "MMC_NAME=%s", mmc_card_name(card));
95 if (retval)
96 return retval;
97
98 /*
99 * Request the mmc_block device. Note: that this is a direct request
100 * for the module it carries no information as to what is inserted.
101 */
102 retval = add_uevent_var(env, "MODALIAS=mmc:block");
103
104 return retval;
105}
106
107static int mmc_bus_probe(struct device *dev)
108{
109 struct mmc_driver *drv = to_mmc_driver(dev->driver);
110 struct mmc_card *card = mmc_dev_to_card(dev);
111
112 return drv->probe(card);
113}
114
115static int mmc_bus_remove(struct device *dev)
116{
117 struct mmc_driver *drv = to_mmc_driver(dev->driver);
118 struct mmc_card *card = mmc_dev_to_card(dev);
119
120 drv->remove(card);
121
122 return 0;
123}
124
125#ifdef CONFIG_PM_SLEEP
126static int mmc_bus_suspend(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 int ret = 0;
131
132 if (dev->driver && drv->suspend)
133 ret = drv->suspend(card);
134 return ret;
135}
136
137static int mmc_bus_resume(struct device *dev)
138{
139 struct mmc_driver *drv = to_mmc_driver(dev->driver);
140 struct mmc_card *card = mmc_dev_to_card(dev);
141 int ret = 0;
142
143 if (dev->driver && drv->resume)
144 ret = drv->resume(card);
145 return ret;
146}
147#endif
148
149#ifdef CONFIG_PM_RUNTIME
150
151static int mmc_runtime_suspend(struct device *dev)
152{
153 struct mmc_card *card = mmc_dev_to_card(dev);
154
155 return mmc_power_save_host(card->host);
156}
157
158static int mmc_runtime_resume(struct device *dev)
159{
160 struct mmc_card *card = mmc_dev_to_card(dev);
161
162 return mmc_power_restore_host(card->host);
163}
164
165static int mmc_runtime_idle(struct device *dev)
166{
167 return pm_runtime_suspend(dev);
168}
169
170#endif /* !CONFIG_PM_RUNTIME */
171
172static const struct dev_pm_ops mmc_bus_pm_ops = {
173 SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume,
174 mmc_runtime_idle)
175 SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_suspend, mmc_bus_resume)
176};
177
178static struct bus_type mmc_bus_type = {
179 .name = "mmc",
180 .dev_attrs = mmc_dev_attrs,
181 .match = mmc_bus_match,
182 .uevent = mmc_bus_uevent,
183 .probe = mmc_bus_probe,
184 .remove = mmc_bus_remove,
185 .pm = &mmc_bus_pm_ops,
186};
187
188int mmc_register_bus(void)
189{
190 return bus_register(&mmc_bus_type);
191}
192
193void mmc_unregister_bus(void)
194{
195 bus_unregister(&mmc_bus_type);
196}
197
198/**
199 * mmc_register_driver - register a media driver
200 * @drv: MMC media driver
201 */
202int mmc_register_driver(struct mmc_driver *drv)
203{
204 drv->drv.bus = &mmc_bus_type;
205 return driver_register(&drv->drv);
206}
207
208EXPORT_SYMBOL(mmc_register_driver);
209
210/**
211 * mmc_unregister_driver - unregister a media driver
212 * @drv: MMC media driver
213 */
214void mmc_unregister_driver(struct mmc_driver *drv)
215{
216 drv->drv.bus = &mmc_bus_type;
217 driver_unregister(&drv->drv);
218}
219
220EXPORT_SYMBOL(mmc_unregister_driver);
221
222static void mmc_release_card(struct device *dev)
223{
224 struct mmc_card *card = mmc_dev_to_card(dev);
225
226 sdio_free_common_cis(card);
227
228 if (card->info)
229 kfree(card->info);
230
231 kfree(card);
232}
233
234/*
235 * Allocate and initialise a new MMC card structure.
236 */
237struct mmc_card *mmc_alloc_card(struct mmc_host *host, struct device_type *type)
238{
239 struct mmc_card *card;
240
241 card = kzalloc(sizeof(struct mmc_card), GFP_KERNEL);
242 if (!card)
243 return ERR_PTR(-ENOMEM);
244
245 card->host = host;
246
247 device_initialize(&card->dev);
248
249 card->dev.parent = mmc_classdev(host);
250 card->dev.bus = &mmc_bus_type;
251 card->dev.release = mmc_release_card;
252 card->dev.type = type;
253
254 return card;
255}
256
257/*
258 * Register a new MMC card with the driver model.
259 */
260int mmc_add_card(struct mmc_card *card)
261{
262 int ret;
263 const char *type;
264 const char *uhs_bus_speed_mode = "";
265 static const char *const uhs_speeds[] = {
266 [UHS_SDR12_BUS_SPEED] = "SDR12 ",
267 [UHS_SDR25_BUS_SPEED] = "SDR25 ",
268 [UHS_SDR50_BUS_SPEED] = "SDR50 ",
269 [UHS_SDR104_BUS_SPEED] = "SDR104 ",
270 [UHS_DDR50_BUS_SPEED] = "DDR50 ",
271 };
272
273
274 dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca);
275
276 switch (card->type) {
277 case MMC_TYPE_MMC:
278 type = "MMC";
279 break;
280 case MMC_TYPE_SD:
281 type = "SD";
282 if (mmc_card_blockaddr(card)) {
283 if (mmc_card_ext_capacity(card))
284 type = "SDXC";
285 else
286 type = "SDHC";
287 }
288 break;
289 case MMC_TYPE_SDIO:
290 type = "SDIO";
291 break;
292 case MMC_TYPE_SD_COMBO:
293 type = "SD-combo";
294 if (mmc_card_blockaddr(card))
295 type = "SDHC-combo";
296 break;
297 default:
298 type = "?";
299 break;
300 }
301
302 if (mmc_sd_card_uhs(card) &&
303 (card->sd_bus_speed < ARRAY_SIZE(uhs_speeds)))
304 uhs_bus_speed_mode = uhs_speeds[card->sd_bus_speed];
305
306 if (mmc_host_is_spi(card->host)) {
307 pr_info("%s: new %s%s%s card on SPI\n",
308 mmc_hostname(card->host),
309 mmc_card_highspeed(card) ? "high speed " : "",
310 mmc_card_ddr_mode(card) ? "DDR " : "",
311 type);
312 } else {
313 pr_info("%s: new %s%s%s%s%s card at address %04x\n",
314 mmc_hostname(card->host),
315 mmc_card_uhs(card) ? "ultra high speed " :
316 (mmc_card_highspeed(card) ? "high speed " : ""),
317 (mmc_card_hs200(card) ? "HS200 " : ""),
318 mmc_card_ddr_mode(card) ? "DDR " : "",
319 uhs_bus_speed_mode, type, card->rca);
320 }
321
322#ifdef CONFIG_DEBUG_FS
323 mmc_add_card_debugfs(card);
324#endif
325
326 ret = device_add(&card->dev);
327 if (ret)
328 return ret;
329
330 mmc_card_set_present(card);
331
332 return 0;
333}
334
335/*
336 * Unregister a new MMC card with the driver model, and
337 * (eventually) free it.
338 */
339void mmc_remove_card(struct mmc_card *card)
340{
341#ifdef CONFIG_DEBUG_FS
342 mmc_remove_card_debugfs(card);
343#endif
344
345 if (mmc_card_present(card)) {
346 if (mmc_host_is_spi(card->host)) {
347 pr_info("%s: SPI card removed\n",
348 mmc_hostname(card->host));
349 } else {
350 pr_info("%s: card %04x removed\n",
351 mmc_hostname(card->host), card->rca);
352 }
353 device_del(&card->dev);
354 }
355
356 put_device(&card->dev);
357}
358