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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> | |
15 | ||
16 | #include <linux/mmc/card.h> | |
17 | #include <linux/mmc/host.h> | |
18 | ||
19 | #include "mmc.h" | |
20 | ||
21 | #define dev_to_mmc_card(d) container_of(d, struct mmc_card, dev) | |
22 | #define to_mmc_driver(d) container_of(d, struct mmc_driver, drv) | |
23 | ||
24 | #define MMC_ATTR(name, fmt, args...) \ | |
e404e274 | 25 | static ssize_t mmc_##name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
26 | { \ |
27 | struct mmc_card *card = dev_to_mmc_card(dev); \ | |
28 | return sprintf(buf, fmt, args); \ | |
29 | } | |
30 | ||
31 | MMC_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], | |
32 | card->raw_cid[2], card->raw_cid[3]); | |
33 | MMC_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], | |
34 | card->raw_csd[2], card->raw_csd[3]); | |
35 | MMC_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); | |
36 | MMC_ATTR(fwrev, "0x%x\n", card->cid.fwrev); | |
37 | MMC_ATTR(hwrev, "0x%x\n", card->cid.hwrev); | |
38 | MMC_ATTR(manfid, "0x%06x\n", card->cid.manfid); | |
39 | MMC_ATTR(name, "%s\n", card->cid.prod_name); | |
40 | MMC_ATTR(oemid, "0x%04x\n", card->cid.oemid); | |
41 | MMC_ATTR(serial, "0x%08x\n", card->cid.serial); | |
42 | ||
43 | #define MMC_ATTR_RO(name) __ATTR(name, S_IRUGO, mmc_##name##_show, NULL) | |
44 | ||
45 | static struct device_attribute mmc_dev_attrs[] = { | |
46 | MMC_ATTR_RO(cid), | |
47 | MMC_ATTR_RO(csd), | |
48 | MMC_ATTR_RO(date), | |
49 | MMC_ATTR_RO(fwrev), | |
50 | MMC_ATTR_RO(hwrev), | |
51 | MMC_ATTR_RO(manfid), | |
52 | MMC_ATTR_RO(name), | |
53 | MMC_ATTR_RO(oemid), | |
54 | MMC_ATTR_RO(serial), | |
55 | __ATTR_NULL | |
56 | }; | |
57 | ||
58 | ||
59 | static void mmc_release_card(struct device *dev) | |
60 | { | |
61 | struct mmc_card *card = dev_to_mmc_card(dev); | |
62 | ||
63 | kfree(card); | |
64 | } | |
65 | ||
66 | /* | |
67 | * This currently matches any MMC driver to any MMC card - drivers | |
68 | * themselves make the decision whether to drive this card in their | |
69 | * probe method. However, we force "bad" cards to fail. | |
70 | */ | |
71 | static int mmc_bus_match(struct device *dev, struct device_driver *drv) | |
72 | { | |
73 | struct mmc_card *card = dev_to_mmc_card(dev); | |
74 | return !mmc_card_bad(card); | |
75 | } | |
76 | ||
77 | static int | |
78 | mmc_bus_hotplug(struct device *dev, char **envp, int num_envp, char *buf, | |
79 | int buf_size) | |
80 | { | |
81 | struct mmc_card *card = dev_to_mmc_card(dev); | |
82 | char ccc[13]; | |
83 | int i = 0; | |
84 | ||
85 | #define add_env(fmt,val) \ | |
86 | ({ \ | |
87 | int len, ret = -ENOMEM; \ | |
88 | if (i < num_envp) { \ | |
89 | envp[i++] = buf; \ | |
90 | len = snprintf(buf, buf_size, fmt, val) + 1; \ | |
91 | buf_size -= len; \ | |
92 | buf += len; \ | |
93 | if (buf_size >= 0) \ | |
94 | ret = 0; \ | |
95 | } \ | |
96 | ret; \ | |
97 | }) | |
98 | ||
99 | for (i = 0; i < 12; i++) | |
100 | ccc[i] = card->csd.cmdclass & (1 << i) ? '1' : '0'; | |
101 | ccc[12] = '\0'; | |
102 | ||
103 | i = 0; | |
104 | add_env("MMC_CCC=%s", ccc); | |
105 | add_env("MMC_MANFID=%06x", card->cid.manfid); | |
106 | add_env("MMC_NAME=%s", mmc_card_name(card)); | |
107 | add_env("MMC_OEMID=%04x", card->cid.oemid); | |
108 | ||
109 | return 0; | |
110 | } | |
111 | ||
112 | static int mmc_bus_suspend(struct device *dev, pm_message_t state) | |
113 | { | |
114 | struct mmc_driver *drv = to_mmc_driver(dev->driver); | |
115 | struct mmc_card *card = dev_to_mmc_card(dev); | |
116 | int ret = 0; | |
117 | ||
118 | if (dev->driver && drv->suspend) | |
119 | ret = drv->suspend(card, state); | |
120 | return ret; | |
121 | } | |
122 | ||
123 | static int mmc_bus_resume(struct device *dev) | |
124 | { | |
125 | struct mmc_driver *drv = to_mmc_driver(dev->driver); | |
126 | struct mmc_card *card = dev_to_mmc_card(dev); | |
127 | int ret = 0; | |
128 | ||
129 | if (dev->driver && drv->resume) | |
130 | ret = drv->resume(card); | |
131 | return ret; | |
132 | } | |
133 | ||
134 | static struct bus_type mmc_bus_type = { | |
135 | .name = "mmc", | |
136 | .dev_attrs = mmc_dev_attrs, | |
137 | .match = mmc_bus_match, | |
138 | .hotplug = mmc_bus_hotplug, | |
139 | .suspend = mmc_bus_suspend, | |
140 | .resume = mmc_bus_resume, | |
141 | }; | |
142 | ||
143 | ||
144 | static int mmc_drv_probe(struct device *dev) | |
145 | { | |
146 | struct mmc_driver *drv = to_mmc_driver(dev->driver); | |
147 | struct mmc_card *card = dev_to_mmc_card(dev); | |
148 | ||
149 | return drv->probe(card); | |
150 | } | |
151 | ||
152 | static int mmc_drv_remove(struct device *dev) | |
153 | { | |
154 | struct mmc_driver *drv = to_mmc_driver(dev->driver); | |
155 | struct mmc_card *card = dev_to_mmc_card(dev); | |
156 | ||
157 | drv->remove(card); | |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
162 | ||
163 | /** | |
164 | * mmc_register_driver - register a media driver | |
165 | * @drv: MMC media driver | |
166 | */ | |
167 | int mmc_register_driver(struct mmc_driver *drv) | |
168 | { | |
169 | drv->drv.bus = &mmc_bus_type; | |
170 | drv->drv.probe = mmc_drv_probe; | |
171 | drv->drv.remove = mmc_drv_remove; | |
172 | return driver_register(&drv->drv); | |
173 | } | |
174 | ||
175 | EXPORT_SYMBOL(mmc_register_driver); | |
176 | ||
177 | /** | |
178 | * mmc_unregister_driver - unregister a media driver | |
179 | * @drv: MMC media driver | |
180 | */ | |
181 | void mmc_unregister_driver(struct mmc_driver *drv) | |
182 | { | |
183 | drv->drv.bus = &mmc_bus_type; | |
184 | driver_unregister(&drv->drv); | |
185 | } | |
186 | ||
187 | EXPORT_SYMBOL(mmc_unregister_driver); | |
188 | ||
189 | ||
190 | /* | |
191 | * Internal function. Initialise a MMC card structure. | |
192 | */ | |
193 | void mmc_init_card(struct mmc_card *card, struct mmc_host *host) | |
194 | { | |
195 | memset(card, 0, sizeof(struct mmc_card)); | |
196 | card->host = host; | |
197 | device_initialize(&card->dev); | |
198 | card->dev.parent = card->host->dev; | |
199 | card->dev.bus = &mmc_bus_type; | |
200 | card->dev.release = mmc_release_card; | |
201 | } | |
202 | ||
203 | /* | |
204 | * Internal function. Register a new MMC card with the driver model. | |
205 | */ | |
206 | int mmc_register_card(struct mmc_card *card) | |
207 | { | |
208 | snprintf(card->dev.bus_id, sizeof(card->dev.bus_id), | |
209 | "%s:%04x", card->host->host_name, card->rca); | |
210 | ||
211 | return device_add(&card->dev); | |
212 | } | |
213 | ||
214 | /* | |
215 | * Internal function. Unregister a new MMC card with the | |
216 | * driver model, and (eventually) free it. | |
217 | */ | |
218 | void mmc_remove_card(struct mmc_card *card) | |
219 | { | |
220 | if (mmc_card_present(card)) | |
221 | device_del(&card->dev); | |
222 | ||
223 | put_device(&card->dev); | |
224 | } | |
225 | ||
226 | ||
227 | static int __init mmc_init(void) | |
228 | { | |
229 | return bus_register(&mmc_bus_type); | |
230 | } | |
231 | ||
232 | static void __exit mmc_exit(void) | |
233 | { | |
234 | bus_unregister(&mmc_bus_type); | |
235 | } | |
236 | ||
237 | module_init(mmc_init); | |
238 | module_exit(mmc_exit); |