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1da177e4 LT |
1 | /* |
2 | * linux/drivers/mmc/mmc_sysfs.c | |
3 | * | |
4 | * Copyright (C) 2003 Russell King, All Rights Reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * MMC sysfs/driver model support. | |
11 | */ | |
12 | #include <linux/module.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/device.h> | |
dce77377 | 15 | #include <linux/idr.h> |
7104e2d5 | 16 | #include <linux/workqueue.h> |
1da177e4 LT |
17 | |
18 | #include <linux/mmc/card.h> | |
19 | #include <linux/mmc/host.h> | |
20 | ||
21 | #include "mmc.h" | |
22 | ||
23 | #define dev_to_mmc_card(d) container_of(d, struct mmc_card, dev) | |
24 | #define to_mmc_driver(d) container_of(d, struct mmc_driver, drv) | |
00b137cf | 25 | #define cls_dev_to_mmc_host(d) container_of(d, struct mmc_host, class_dev) |
1da177e4 LT |
26 | |
27 | #define MMC_ATTR(name, fmt, args...) \ | |
e404e274 | 28 | static ssize_t mmc_##name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
29 | { \ |
30 | struct mmc_card *card = dev_to_mmc_card(dev); \ | |
31 | return sprintf(buf, fmt, args); \ | |
32 | } | |
33 | ||
34 | MMC_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], | |
35 | card->raw_cid[2], card->raw_cid[3]); | |
36 | MMC_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], | |
37 | card->raw_csd[2], card->raw_csd[3]); | |
a9c4342b | 38 | MMC_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); |
1da177e4 LT |
39 | MMC_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); |
40 | MMC_ATTR(fwrev, "0x%x\n", card->cid.fwrev); | |
41 | MMC_ATTR(hwrev, "0x%x\n", card->cid.hwrev); | |
42 | MMC_ATTR(manfid, "0x%06x\n", card->cid.manfid); | |
43 | MMC_ATTR(name, "%s\n", card->cid.prod_name); | |
44 | MMC_ATTR(oemid, "0x%04x\n", card->cid.oemid); | |
45 | MMC_ATTR(serial, "0x%08x\n", card->cid.serial); | |
46 | ||
47 | #define MMC_ATTR_RO(name) __ATTR(name, S_IRUGO, mmc_##name##_show, NULL) | |
48 | ||
49 | static struct device_attribute mmc_dev_attrs[] = { | |
50 | MMC_ATTR_RO(cid), | |
51 | MMC_ATTR_RO(csd), | |
52 | MMC_ATTR_RO(date), | |
53 | MMC_ATTR_RO(fwrev), | |
54 | MMC_ATTR_RO(hwrev), | |
55 | MMC_ATTR_RO(manfid), | |
56 | MMC_ATTR_RO(name), | |
57 | MMC_ATTR_RO(oemid), | |
58 | MMC_ATTR_RO(serial), | |
59 | __ATTR_NULL | |
60 | }; | |
61 | ||
4bc20a8d PO |
62 | static struct device_attribute mmc_dev_attr_scr = MMC_ATTR_RO(scr); |
63 | ||
1da177e4 LT |
64 | |
65 | static void mmc_release_card(struct device *dev) | |
66 | { | |
67 | struct mmc_card *card = dev_to_mmc_card(dev); | |
68 | ||
69 | kfree(card); | |
70 | } | |
71 | ||
72 | /* | |
73 | * This currently matches any MMC driver to any MMC card - drivers | |
74 | * themselves make the decision whether to drive this card in their | |
75 | * probe method. However, we force "bad" cards to fail. | |
76 | */ | |
77 | static int mmc_bus_match(struct device *dev, struct device_driver *drv) | |
78 | { | |
79 | struct mmc_card *card = dev_to_mmc_card(dev); | |
80 | return !mmc_card_bad(card); | |
81 | } | |
82 | ||
83 | static int | |
312c004d | 84 | mmc_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf, |
1da177e4 LT |
85 | int buf_size) |
86 | { | |
87 | struct mmc_card *card = dev_to_mmc_card(dev); | |
88 | char ccc[13]; | |
89 | int i = 0; | |
90 | ||
91 | #define add_env(fmt,val) \ | |
92 | ({ \ | |
93 | int len, ret = -ENOMEM; \ | |
94 | if (i < num_envp) { \ | |
95 | envp[i++] = buf; \ | |
96 | len = snprintf(buf, buf_size, fmt, val) + 1; \ | |
97 | buf_size -= len; \ | |
98 | buf += len; \ | |
99 | if (buf_size >= 0) \ | |
100 | ret = 0; \ | |
101 | } \ | |
102 | ret; \ | |
103 | }) | |
104 | ||
105 | for (i = 0; i < 12; i++) | |
106 | ccc[i] = card->csd.cmdclass & (1 << i) ? '1' : '0'; | |
107 | ccc[12] = '\0'; | |
108 | ||
109 | i = 0; | |
110 | add_env("MMC_CCC=%s", ccc); | |
111 | add_env("MMC_MANFID=%06x", card->cid.manfid); | |
112 | add_env("MMC_NAME=%s", mmc_card_name(card)); | |
113 | add_env("MMC_OEMID=%04x", card->cid.oemid); | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
118 | static int mmc_bus_suspend(struct device *dev, pm_message_t state) | |
119 | { | |
120 | struct mmc_driver *drv = to_mmc_driver(dev->driver); | |
121 | struct mmc_card *card = dev_to_mmc_card(dev); | |
122 | int ret = 0; | |
123 | ||
124 | if (dev->driver && drv->suspend) | |
125 | ret = drv->suspend(card, state); | |
126 | return ret; | |
127 | } | |
128 | ||
129 | static int mmc_bus_resume(struct device *dev) | |
130 | { | |
131 | struct mmc_driver *drv = to_mmc_driver(dev->driver); | |
132 | struct mmc_card *card = dev_to_mmc_card(dev); | |
133 | int ret = 0; | |
134 | ||
135 | if (dev->driver && drv->resume) | |
136 | ret = drv->resume(card); | |
137 | return ret; | |
138 | } | |
139 | ||
4d0b653c | 140 | static int mmc_bus_probe(struct device *dev) |
1da177e4 LT |
141 | { |
142 | struct mmc_driver *drv = to_mmc_driver(dev->driver); | |
143 | struct mmc_card *card = dev_to_mmc_card(dev); | |
144 | ||
145 | return drv->probe(card); | |
146 | } | |
147 | ||
4d0b653c | 148 | static int mmc_bus_remove(struct device *dev) |
1da177e4 LT |
149 | { |
150 | struct mmc_driver *drv = to_mmc_driver(dev->driver); | |
151 | struct mmc_card *card = dev_to_mmc_card(dev); | |
152 | ||
153 | drv->remove(card); | |
154 | ||
155 | return 0; | |
156 | } | |
157 | ||
4d0b653c RK |
158 | static struct bus_type mmc_bus_type = { |
159 | .name = "mmc", | |
160 | .dev_attrs = mmc_dev_attrs, | |
161 | .match = mmc_bus_match, | |
162 | .uevent = mmc_bus_uevent, | |
163 | .probe = mmc_bus_probe, | |
164 | .remove = mmc_bus_remove, | |
165 | .suspend = mmc_bus_suspend, | |
166 | .resume = mmc_bus_resume, | |
167 | }; | |
1da177e4 LT |
168 | |
169 | /** | |
170 | * mmc_register_driver - register a media driver | |
171 | * @drv: MMC media driver | |
172 | */ | |
173 | int mmc_register_driver(struct mmc_driver *drv) | |
174 | { | |
175 | drv->drv.bus = &mmc_bus_type; | |
1da177e4 LT |
176 | return driver_register(&drv->drv); |
177 | } | |
178 | ||
179 | EXPORT_SYMBOL(mmc_register_driver); | |
180 | ||
181 | /** | |
182 | * mmc_unregister_driver - unregister a media driver | |
183 | * @drv: MMC media driver | |
184 | */ | |
185 | void mmc_unregister_driver(struct mmc_driver *drv) | |
186 | { | |
187 | drv->drv.bus = &mmc_bus_type; | |
188 | driver_unregister(&drv->drv); | |
189 | } | |
190 | ||
191 | EXPORT_SYMBOL(mmc_unregister_driver); | |
192 | ||
193 | ||
194 | /* | |
195 | * Internal function. Initialise a MMC card structure. | |
196 | */ | |
197 | void mmc_init_card(struct mmc_card *card, struct mmc_host *host) | |
198 | { | |
199 | memset(card, 0, sizeof(struct mmc_card)); | |
200 | card->host = host; | |
201 | device_initialize(&card->dev); | |
202 | card->dev.parent = card->host->dev; | |
203 | card->dev.bus = &mmc_bus_type; | |
204 | card->dev.release = mmc_release_card; | |
205 | } | |
206 | ||
207 | /* | |
208 | * Internal function. Register a new MMC card with the driver model. | |
209 | */ | |
210 | int mmc_register_card(struct mmc_card *card) | |
211 | { | |
4bc20a8d PO |
212 | int ret; |
213 | ||
1da177e4 | 214 | snprintf(card->dev.bus_id, sizeof(card->dev.bus_id), |
d366b643 | 215 | "%s:%04x", mmc_hostname(card->host), card->rca); |
1da177e4 | 216 | |
4bc20a8d PO |
217 | ret = device_add(&card->dev); |
218 | if (ret == 0) { | |
219 | if (mmc_card_sd(card)) { | |
220 | ret = device_create_file(&card->dev, &mmc_dev_attr_scr); | |
221 | if (ret) | |
222 | device_del(&card->dev); | |
223 | } | |
224 | } | |
225 | return ret; | |
1da177e4 LT |
226 | } |
227 | ||
228 | /* | |
229 | * Internal function. Unregister a new MMC card with the | |
230 | * driver model, and (eventually) free it. | |
231 | */ | |
232 | void mmc_remove_card(struct mmc_card *card) | |
233 | { | |
4bc20a8d PO |
234 | if (mmc_card_present(card)) { |
235 | if (mmc_card_sd(card)) | |
236 | device_remove_file(&card->dev, &mmc_dev_attr_scr); | |
237 | ||
1da177e4 | 238 | device_del(&card->dev); |
4bc20a8d | 239 | } |
1da177e4 LT |
240 | |
241 | put_device(&card->dev); | |
242 | } | |
243 | ||
244 | ||
00b137cf RK |
245 | static void mmc_host_classdev_release(struct class_device *dev) |
246 | { | |
247 | struct mmc_host *host = cls_dev_to_mmc_host(dev); | |
248 | kfree(host); | |
249 | } | |
250 | ||
251 | static struct class mmc_host_class = { | |
252 | .name = "mmc_host", | |
253 | .release = mmc_host_classdev_release, | |
254 | }; | |
255 | ||
dce77377 RK |
256 | static DEFINE_IDR(mmc_host_idr); |
257 | static DEFINE_SPINLOCK(mmc_host_lock); | |
258 | ||
00b137cf RK |
259 | /* |
260 | * Internal function. Allocate a new MMC host. | |
261 | */ | |
262 | struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev) | |
263 | { | |
264 | struct mmc_host *host; | |
265 | ||
266 | host = kmalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL); | |
267 | if (host) { | |
268 | memset(host, 0, sizeof(struct mmc_host) + extra); | |
269 | ||
270 | host->dev = dev; | |
271 | host->class_dev.dev = host->dev; | |
272 | host->class_dev.class = &mmc_host_class; | |
273 | class_device_initialize(&host->class_dev); | |
274 | } | |
275 | ||
276 | return host; | |
277 | } | |
278 | ||
279 | /* | |
280 | * Internal function. Register a new MMC host with the MMC class. | |
281 | */ | |
282 | int mmc_add_host_sysfs(struct mmc_host *host) | |
283 | { | |
dce77377 RK |
284 | int err; |
285 | ||
286 | if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL)) | |
287 | return -ENOMEM; | |
288 | ||
289 | spin_lock(&mmc_host_lock); | |
290 | err = idr_get_new(&mmc_host_idr, host, &host->index); | |
291 | spin_unlock(&mmc_host_lock); | |
292 | if (err) | |
293 | return err; | |
00b137cf | 294 | |
1ad434d7 | 295 | snprintf(host->class_dev.class_id, BUS_ID_SIZE, |
dce77377 | 296 | "mmc%d", host->index); |
00b137cf | 297 | |
00b137cf RK |
298 | return class_device_add(&host->class_dev); |
299 | } | |
300 | ||
301 | /* | |
302 | * Internal function. Unregister a MMC host with the MMC class. | |
303 | */ | |
304 | void mmc_remove_host_sysfs(struct mmc_host *host) | |
305 | { | |
306 | class_device_del(&host->class_dev); | |
dce77377 RK |
307 | |
308 | spin_lock(&mmc_host_lock); | |
309 | idr_remove(&mmc_host_idr, host->index); | |
310 | spin_unlock(&mmc_host_lock); | |
00b137cf RK |
311 | } |
312 | ||
313 | /* | |
314 | * Internal function. Free a MMC host. | |
315 | */ | |
316 | void mmc_free_host_sysfs(struct mmc_host *host) | |
317 | { | |
318 | class_device_put(&host->class_dev); | |
319 | } | |
320 | ||
7104e2d5 PO |
321 | static struct workqueue_struct *workqueue; |
322 | ||
323 | /* | |
324 | * Internal function. Schedule work in the MMC work queue. | |
325 | */ | |
326 | int mmc_schedule_work(struct work_struct *work) | |
327 | { | |
328 | return queue_work(workqueue, work); | |
329 | } | |
330 | ||
331 | /* | |
332 | * Internal function. Schedule delayed work in the MMC work queue. | |
333 | */ | |
334 | int mmc_schedule_delayed_work(struct work_struct *work, unsigned long delay) | |
335 | { | |
336 | return queue_delayed_work(workqueue, work, delay); | |
337 | } | |
338 | ||
339 | /* | |
340 | * Internal function. Flush all scheduled work from the MMC work queue. | |
341 | */ | |
342 | void mmc_flush_scheduled_work(void) | |
343 | { | |
344 | flush_workqueue(workqueue); | |
345 | } | |
00b137cf | 346 | |
1da177e4 LT |
347 | static int __init mmc_init(void) |
348 | { | |
7104e2d5 PO |
349 | int ret; |
350 | ||
351 | workqueue = create_singlethread_workqueue("kmmcd"); | |
352 | if (!workqueue) | |
353 | return -ENOMEM; | |
354 | ||
355 | ret = bus_register(&mmc_bus_type); | |
00b137cf RK |
356 | if (ret == 0) { |
357 | ret = class_register(&mmc_host_class); | |
358 | if (ret) | |
359 | bus_unregister(&mmc_bus_type); | |
360 | } | |
361 | return ret; | |
1da177e4 LT |
362 | } |
363 | ||
364 | static void __exit mmc_exit(void) | |
365 | { | |
00b137cf | 366 | class_unregister(&mmc_host_class); |
1da177e4 | 367 | bus_unregister(&mmc_bus_type); |
7104e2d5 | 368 | destroy_workqueue(workqueue); |
1da177e4 LT |
369 | } |
370 | ||
371 | module_init(mmc_init); | |
372 | module_exit(mmc_exit); |