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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/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