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