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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/device.h>
15#include <linux/err.h>
16#include <linux/slab.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 "sdio_cis.h"
24#include "bus.h"
25
26#define to_mmc_driver(d) container_of(d, struct mmc_driver, drv)
27
28static ssize_t mmc_type_show(struct device *dev,
29 struct device_attribute *attr, char *buf)
30{
31 struct mmc_card *card = mmc_dev_to_card(dev);
32
33 switch (card->type) {
34 case MMC_TYPE_MMC:
35 return sprintf(buf, "MMC\n");
36 case MMC_TYPE_SD:
37 return sprintf(buf, "SD\n");
38 case MMC_TYPE_SDIO:
39 return sprintf(buf, "SDIO\n");
40 case MMC_TYPE_SD_COMBO:
41 return sprintf(buf, "SDcombo\n");
42 default:
43 return -EFAULT;
44 }
45}
46
47static struct device_attribute mmc_dev_attrs[] = {
48 __ATTR(type, S_IRUGO, mmc_type_show, NULL),
49 __ATTR_NULL,
50};
51
52/*
53 * This currently matches any MMC driver to any MMC card - drivers
54 * themselves make the decision whether to drive this card in their
55 * probe method.
56 */
57static int mmc_bus_match(struct device *dev, struct device_driver *drv)
58{
59 return 1;
60}
61
62static int
63mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
64{
65 struct mmc_card *card = mmc_dev_to_card(dev);
66 const char *type;
67 int retval = 0;
68
69 switch (card->type) {
70 case MMC_TYPE_MMC:
71 type = "MMC";
72 break;
73 case MMC_TYPE_SD:
74 type = "SD";
75 break;
76 case MMC_TYPE_SDIO:
77 type = "SDIO";
78 break;
79 case MMC_TYPE_SD_COMBO:
80 type = "SDcombo";
81 break;
82 default:
83 type = NULL;
84 }
85
86 if (type) {
87 retval = add_uevent_var(env, "MMC_TYPE=%s", type);
88 if (retval)
89 return retval;
90 }
91
92 retval = add_uevent_var(env, "MMC_NAME=%s", mmc_card_name(card));
93 if (retval)
94 return retval;
95
96 /*
97 * Request the mmc_block device. Note: that this is a direct request
98 * for the module it carries no information as to what is inserted.
99 */
100 retval = add_uevent_var(env, "MODALIAS=mmc:block");
101
102 return retval;
103}
104
105static int mmc_bus_probe(struct device *dev)
106{
107 struct mmc_driver *drv = to_mmc_driver(dev->driver);
108 struct mmc_card *card = mmc_dev_to_card(dev);
109
110 return drv->probe(card);
111}
112
113static int mmc_bus_remove(struct device *dev)
114{
115 struct mmc_driver *drv = to_mmc_driver(dev->driver);
116 struct mmc_card *card = mmc_dev_to_card(dev);
117
118 drv->remove(card);
119
120 return 0;
121}
122
123static int mmc_bus_suspend(struct device *dev, pm_message_t state)
124{
125 struct mmc_driver *drv = to_mmc_driver(dev->driver);
126 struct mmc_card *card = mmc_dev_to_card(dev);
127 int ret = 0;
128
129 if (dev->driver && drv->suspend)
130 ret = drv->suspend(card, state);
131 return ret;
132}
133
134static int mmc_bus_resume(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 int ret = 0;
139
140 if (dev->driver && drv->resume)
141 ret = drv->resume(card);
142 return ret;
143}
144
145#ifdef CONFIG_PM_RUNTIME
146
147static int mmc_runtime_suspend(struct device *dev)
148{
149 struct mmc_card *card = mmc_dev_to_card(dev);
150
151 return mmc_power_save_host(card->host);
152}
153
154static int mmc_runtime_resume(struct device *dev)
155{
156 struct mmc_card *card = mmc_dev_to_card(dev);
157
158 return mmc_power_restore_host(card->host);
159}
160
161static int mmc_runtime_idle(struct device *dev)
162{
163 return pm_runtime_suspend(dev);
164}
165
166static const struct dev_pm_ops mmc_bus_pm_ops = {
167 .runtime_suspend = mmc_runtime_suspend,
168 .runtime_resume = mmc_runtime_resume,
169 .runtime_idle = mmc_runtime_idle,
170};
171
172#define MMC_PM_OPS_PTR (&mmc_bus_pm_ops)
173
174#else /* !CONFIG_PM_RUNTIME */
175
176#define MMC_PM_OPS_PTR NULL
177
178#endif /* !CONFIG_PM_RUNTIME */
179
180static struct bus_type mmc_bus_type = {
181 .name = "mmc",
182 .dev_attrs = mmc_dev_attrs,
183 .match = mmc_bus_match,
184 .uevent = mmc_bus_uevent,
185 .probe = mmc_bus_probe,
186 .remove = mmc_bus_remove,
187 .suspend = mmc_bus_suspend,
188 .resume = mmc_bus_resume,
189 .pm = MMC_PM_OPS_PTR,
190};
191
192int mmc_register_bus(void)
193{
194 return bus_register(&mmc_bus_type);
195}
196
197void mmc_unregister_bus(void)
198{
199 bus_unregister(&mmc_bus_type);
200}
201
202/**
203 * mmc_register_driver - register a media driver
204 * @drv: MMC media driver
205 */
206int mmc_register_driver(struct mmc_driver *drv)
207{
208 drv->drv.bus = &mmc_bus_type;
209 return driver_register(&drv->drv);
210}
211
212EXPORT_SYMBOL(mmc_register_driver);
213
214/**
215 * mmc_unregister_driver - unregister a media driver
216 * @drv: MMC media driver
217 */
218void mmc_unregister_driver(struct mmc_driver *drv)
219{
220 drv->drv.bus = &mmc_bus_type;
221 driver_unregister(&drv->drv);
222}
223
224EXPORT_SYMBOL(mmc_unregister_driver);
225
226static void mmc_release_card(struct device *dev)
227{
228 struct mmc_card *card = mmc_dev_to_card(dev);
229
230 sdio_free_common_cis(card);
231
232 if (card->info)
233 kfree(card->info);
234
235 kfree(card);
236}
237
238/*
239 * Allocate and initialise a new MMC card structure.
240 */
241struct mmc_card *mmc_alloc_card(struct mmc_host *host, struct device_type *type)
242{
243 struct mmc_card *card;
244
245 card = kzalloc(sizeof(struct mmc_card), GFP_KERNEL);
246 if (!card)
247 return ERR_PTR(-ENOMEM);
248
249 card->host = host;
250
251 device_initialize(&card->dev);
252
253 card->dev.parent = mmc_classdev(host);
254 card->dev.bus = &mmc_bus_type;
255 card->dev.release = mmc_release_card;
256 card->dev.type = type;
257
258 return card;
259}
260
261/*
262 * Register a new MMC card with the driver model.
263 */
264int mmc_add_card(struct mmc_card *card)
265{
266 int ret;
267 const char *type;
268
269 dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca);
270
271 switch (card->type) {
272 case MMC_TYPE_MMC:
273 type = "MMC";
274 break;
275 case MMC_TYPE_SD:
276 type = "SD";
277 if (mmc_card_blockaddr(card)) {
278 if (mmc_card_ext_capacity(card))
279 type = "SDXC";
280 else
281 type = "SDHC";
282 }
283 break;
284 case MMC_TYPE_SDIO:
285 type = "SDIO";
286 break;
287 case MMC_TYPE_SD_COMBO:
288 type = "SD-combo";
289 if (mmc_card_blockaddr(card))
290 type = "SDHC-combo";
291 break;
292 default:
293 type = "?";
294 break;
295 }
296
297 if (mmc_host_is_spi(card->host)) {
298 printk(KERN_INFO "%s: new %s%s%s card on SPI\n",
299 mmc_hostname(card->host),
300 mmc_card_highspeed(card) ? "high speed " : "",
301 mmc_card_ddr_mode(card) ? "DDR " : "",
302 type);
303 } else {
304 printk(KERN_INFO "%s: new %s%s%s card at address %04x\n",
305 mmc_hostname(card->host),
306 mmc_sd_card_uhs(card) ? "ultra high speed " :
307 (mmc_card_highspeed(card) ? "high speed " : ""),
308 mmc_card_ddr_mode(card) ? "DDR " : "",
309 type, card->rca);
310 }
311
312#ifdef CONFIG_DEBUG_FS
313 mmc_add_card_debugfs(card);
314#endif
315
316 ret = device_add(&card->dev);
317 if (ret)
318 return ret;
319
320 mmc_card_set_present(card);
321
322 return 0;
323}
324
325/*
326 * Unregister a new MMC card with the driver model, and
327 * (eventually) free it.
328 */
329void mmc_remove_card(struct mmc_card *card)
330{
331#ifdef CONFIG_DEBUG_FS
332 mmc_remove_card_debugfs(card);
333#endif
334
335 if (mmc_card_present(card)) {
336 if (mmc_host_is_spi(card->host)) {
337 printk(KERN_INFO "%s: SPI card removed\n",
338 mmc_hostname(card->host));
339 } else {
340 printk(KERN_INFO "%s: card %04x removed\n",
341 mmc_hostname(card->host), card->rca);
342 }
343 device_del(&card->dev);
344 }
345
346 put_device(&card->dev);
347}
348
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