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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
56
57
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
100
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
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
200
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
212
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 kfree(card->info);
229
230 kfree(card);
231}
232
233
234
235
236struct mmc_card *mmc_alloc_card(struct mmc_host *host, struct device_type *type)
237{
238 struct mmc_card *card;
239
240 card = kzalloc(sizeof(struct mmc_card), GFP_KERNEL);
241 if (!card)
242 return ERR_PTR(-ENOMEM);
243
244 card->host = host;
245
246 device_initialize(&card->dev);
247
248 card->dev.parent = mmc_classdev(host);
249 card->dev.bus = &mmc_bus_type;
250 card->dev.release = mmc_release_card;
251 card->dev.type = type;
252
253 return card;
254}
255
256
257
258
259int mmc_add_card(struct mmc_card *card)
260{
261 int ret;
262 const char *type;
263 const char *uhs_bus_speed_mode = "";
264 static const char *const uhs_speeds[] = {
265 [UHS_SDR12_BUS_SPEED] = "SDR12 ",
266 [UHS_SDR25_BUS_SPEED] = "SDR25 ",
267 [UHS_SDR50_BUS_SPEED] = "SDR50 ",
268 [UHS_SDR104_BUS_SPEED] = "SDR104 ",
269 [UHS_DDR50_BUS_SPEED] = "DDR50 ",
270 };
271
272
273 dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca);
274
275 switch (card->type) {
276 case MMC_TYPE_MMC:
277 type = "MMC";
278 break;
279 case MMC_TYPE_SD:
280 type = "SD";
281 if (mmc_card_blockaddr(card)) {
282 if (mmc_card_ext_capacity(card))
283 type = "SDXC";
284 else
285 type = "SDHC";
286 }
287 break;
288 case MMC_TYPE_SDIO:
289 type = "SDIO";
290 break;
291 case MMC_TYPE_SD_COMBO:
292 type = "SD-combo";
293 if (mmc_card_blockaddr(card))
294 type = "SDHC-combo";
295 break;
296 default:
297 type = "?";
298 break;
299 }
300
301 if (mmc_sd_card_uhs(card) &&
302 (card->sd_bus_speed < ARRAY_SIZE(uhs_speeds)))
303 uhs_bus_speed_mode = uhs_speeds[card->sd_bus_speed];
304
305 if (mmc_host_is_spi(card->host)) {
306 pr_info("%s: new %s%s%s card on SPI\n",
307 mmc_hostname(card->host),
308 mmc_card_highspeed(card) ? "high speed " : "",
309 mmc_card_ddr_mode(card) ? "DDR " : "",
310 type);
311 } else {
312 pr_info("%s: new %s%s%s%s%s card at address %04x\n",
313 mmc_hostname(card->host),
314 mmc_card_uhs(card) ? "ultra high speed " :
315 (mmc_card_highspeed(card) ? "high speed " : ""),
316 (mmc_card_hs200(card) ? "HS200 " : ""),
317 mmc_card_ddr_mode(card) ? "DDR " : "",
318 uhs_bus_speed_mode, type, card->rca);
319 }
320
321#ifdef CONFIG_DEBUG_FS
322 mmc_add_card_debugfs(card);
323#endif
324 mmc_init_context_info(card->host);
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
337
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
359