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4101c16a PO |
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> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
4101c16a PO |
17 | |
18 | #include <linux/mmc/card.h> | |
19 | #include <linux/mmc/host.h> | |
20 | ||
4101c16a | 21 | #include "core.h" |
1a632f8c | 22 | #include "sdio_cis.h" |
4101c16a PO |
23 | #include "bus.h" |
24 | ||
25 | #define dev_to_mmc_card(d) container_of(d, struct mmc_card, dev) | |
26 | #define to_mmc_driver(d) container_of(d, struct mmc_driver, drv) | |
27 | ||
28 | static ssize_t mmc_type_show(struct device *dev, | |
29 | struct device_attribute *attr, char *buf) | |
30 | { | |
31 | struct mmc_card *card = dev_to_mmc_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"); | |
5c4e6f13 PO |
38 | case MMC_TYPE_SDIO: |
39 | return sprintf(buf, "SDIO\n"); | |
7310ece8 MM |
40 | case MMC_TYPE_SD_COMBO: |
41 | return sprintf(buf, "SDcombo\n"); | |
4101c16a PO |
42 | default: |
43 | return -EFAULT; | |
44 | } | |
45 | } | |
46 | ||
47 | static struct device_attribute mmc_dev_attrs[] = { | |
51ec92e2 | 48 | __ATTR(type, S_IRUGO, mmc_type_show, NULL), |
4101c16a PO |
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 | */ | |
57 | static int mmc_bus_match(struct device *dev, struct device_driver *drv) | |
58 | { | |
59 | return 1; | |
60 | } | |
61 | ||
62 | static int | |
7eff2e7a | 63 | mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
4101c16a PO |
64 | { |
65 | struct mmc_card *card = dev_to_mmc_card(dev); | |
9eb3a94d | 66 | const char *type; |
7eff2e7a | 67 | int retval = 0; |
4101c16a PO |
68 | |
69 | switch (card->type) { | |
70 | case MMC_TYPE_MMC: | |
9eb3a94d | 71 | type = "MMC"; |
4101c16a PO |
72 | break; |
73 | case MMC_TYPE_SD: | |
9eb3a94d | 74 | type = "SD"; |
4101c16a | 75 | break; |
5c4e6f13 | 76 | case MMC_TYPE_SDIO: |
9eb3a94d | 77 | type = "SDIO"; |
5c4e6f13 | 78 | break; |
7310ece8 MM |
79 | case MMC_TYPE_SD_COMBO: |
80 | type = "SDcombo"; | |
81 | break; | |
9eb3a94d PO |
82 | default: |
83 | type = NULL; | |
4101c16a PO |
84 | } |
85 | ||
9eb3a94d | 86 | if (type) { |
7eff2e7a KS |
87 | retval = add_uevent_var(env, "MMC_TYPE=%s", type); |
88 | if (retval) | |
89 | return retval; | |
9eb3a94d | 90 | } |
4101c16a | 91 | |
7eff2e7a | 92 | retval = add_uevent_var(env, "MMC_NAME=%s", mmc_card_name(card)); |
6b0b6285 AW |
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"); | |
4101c16a | 101 | |
7eff2e7a | 102 | return retval; |
4101c16a PO |
103 | } |
104 | ||
105 | static int mmc_bus_probe(struct device *dev) | |
106 | { | |
107 | struct mmc_driver *drv = to_mmc_driver(dev->driver); | |
108 | struct mmc_card *card = dev_to_mmc_card(dev); | |
109 | ||
110 | return drv->probe(card); | |
111 | } | |
112 | ||
113 | static int mmc_bus_remove(struct device *dev) | |
114 | { | |
115 | struct mmc_driver *drv = to_mmc_driver(dev->driver); | |
116 | struct mmc_card *card = dev_to_mmc_card(dev); | |
117 | ||
118 | drv->remove(card); | |
119 | ||
120 | return 0; | |
121 | } | |
122 | ||
123 | static 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 = dev_to_mmc_card(dev); | |
127 | int ret = 0; | |
128 | ||
129 | if (dev->driver && drv->suspend) | |
130 | ret = drv->suspend(card, state); | |
131 | return ret; | |
132 | } | |
133 | ||
134 | static int mmc_bus_resume(struct device *dev) | |
135 | { | |
136 | struct mmc_driver *drv = to_mmc_driver(dev->driver); | |
137 | struct mmc_card *card = dev_to_mmc_card(dev); | |
138 | int ret = 0; | |
139 | ||
140 | if (dev->driver && drv->resume) | |
141 | ret = drv->resume(card); | |
142 | return ret; | |
143 | } | |
144 | ||
145 | static struct bus_type mmc_bus_type = { | |
146 | .name = "mmc", | |
147 | .dev_attrs = mmc_dev_attrs, | |
148 | .match = mmc_bus_match, | |
149 | .uevent = mmc_bus_uevent, | |
150 | .probe = mmc_bus_probe, | |
151 | .remove = mmc_bus_remove, | |
152 | .suspend = mmc_bus_suspend, | |
153 | .resume = mmc_bus_resume, | |
154 | }; | |
155 | ||
156 | int mmc_register_bus(void) | |
157 | { | |
158 | return bus_register(&mmc_bus_type); | |
159 | } | |
160 | ||
161 | void mmc_unregister_bus(void) | |
162 | { | |
163 | bus_unregister(&mmc_bus_type); | |
164 | } | |
165 | ||
166 | /** | |
167 | * mmc_register_driver - register a media driver | |
168 | * @drv: MMC media driver | |
169 | */ | |
170 | int mmc_register_driver(struct mmc_driver *drv) | |
171 | { | |
172 | drv->drv.bus = &mmc_bus_type; | |
173 | return driver_register(&drv->drv); | |
174 | } | |
175 | ||
176 | EXPORT_SYMBOL(mmc_register_driver); | |
177 | ||
178 | /** | |
179 | * mmc_unregister_driver - unregister a media driver | |
180 | * @drv: MMC media driver | |
181 | */ | |
182 | void mmc_unregister_driver(struct mmc_driver *drv) | |
183 | { | |
184 | drv->drv.bus = &mmc_bus_type; | |
185 | driver_unregister(&drv->drv); | |
186 | } | |
187 | ||
188 | EXPORT_SYMBOL(mmc_unregister_driver); | |
189 | ||
190 | static void mmc_release_card(struct device *dev) | |
191 | { | |
192 | struct mmc_card *card = dev_to_mmc_card(dev); | |
193 | ||
1a632f8c PO |
194 | sdio_free_common_cis(card); |
195 | ||
759bdc7a PO |
196 | if (card->info) |
197 | kfree(card->info); | |
198 | ||
4101c16a PO |
199 | kfree(card); |
200 | } | |
201 | ||
202 | /* | |
203 | * Allocate and initialise a new MMC card structure. | |
204 | */ | |
51ec92e2 | 205 | struct mmc_card *mmc_alloc_card(struct mmc_host *host, struct device_type *type) |
4101c16a PO |
206 | { |
207 | struct mmc_card *card; | |
208 | ||
733cb1e4 | 209 | card = kzalloc(sizeof(struct mmc_card), GFP_KERNEL); |
4101c16a PO |
210 | if (!card) |
211 | return ERR_PTR(-ENOMEM); | |
212 | ||
4101c16a PO |
213 | card->host = host; |
214 | ||
215 | device_initialize(&card->dev); | |
216 | ||
217 | card->dev.parent = mmc_classdev(host); | |
218 | card->dev.bus = &mmc_bus_type; | |
219 | card->dev.release = mmc_release_card; | |
51ec92e2 | 220 | card->dev.type = type; |
4101c16a PO |
221 | |
222 | return card; | |
223 | } | |
224 | ||
225 | /* | |
226 | * Register a new MMC card with the driver model. | |
227 | */ | |
228 | int mmc_add_card(struct mmc_card *card) | |
229 | { | |
230 | int ret; | |
109b5bed | 231 | const char *type; |
4101c16a | 232 | |
d1b26863 | 233 | dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca); |
4101c16a | 234 | |
109b5bed PO |
235 | switch (card->type) { |
236 | case MMC_TYPE_MMC: | |
237 | type = "MMC"; | |
238 | break; | |
239 | case MMC_TYPE_SD: | |
240 | type = "SD"; | |
241 | if (mmc_card_blockaddr(card)) | |
242 | type = "SDHC"; | |
243 | break; | |
5c4e6f13 PO |
244 | case MMC_TYPE_SDIO: |
245 | type = "SDIO"; | |
246 | break; | |
7310ece8 MM |
247 | case MMC_TYPE_SD_COMBO: |
248 | type = "SD-combo"; | |
249 | if (mmc_card_blockaddr(card)) | |
250 | type = "SDHC-combo"; | |
109b5bed PO |
251 | default: |
252 | type = "?"; | |
253 | break; | |
254 | } | |
255 | ||
af517150 DB |
256 | if (mmc_host_is_spi(card->host)) { |
257 | printk(KERN_INFO "%s: new %s%s card on SPI\n", | |
258 | mmc_hostname(card->host), | |
259 | mmc_card_highspeed(card) ? "high speed " : "", | |
260 | type); | |
261 | } else { | |
262 | printk(KERN_INFO "%s: new %s%s card at address %04x\n", | |
263 | mmc_hostname(card->host), | |
264 | mmc_card_highspeed(card) ? "high speed " : "", | |
265 | type, card->rca); | |
266 | } | |
109b5bed | 267 | |
4101c16a PO |
268 | ret = device_add(&card->dev); |
269 | if (ret) | |
270 | return ret; | |
271 | ||
f4b7f927 HS |
272 | #ifdef CONFIG_DEBUG_FS |
273 | mmc_add_card_debugfs(card); | |
274 | #endif | |
275 | ||
4101c16a PO |
276 | mmc_card_set_present(card); |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
281 | /* | |
282 | * Unregister a new MMC card with the driver model, and | |
283 | * (eventually) free it. | |
284 | */ | |
285 | void mmc_remove_card(struct mmc_card *card) | |
286 | { | |
f4b7f927 HS |
287 | #ifdef CONFIG_DEBUG_FS |
288 | mmc_remove_card_debugfs(card); | |
289 | #endif | |
290 | ||
4101c16a | 291 | if (mmc_card_present(card)) { |
af517150 DB |
292 | if (mmc_host_is_spi(card->host)) { |
293 | printk(KERN_INFO "%s: SPI card removed\n", | |
294 | mmc_hostname(card->host)); | |
295 | } else { | |
296 | printk(KERN_INFO "%s: card %04x removed\n", | |
297 | mmc_hostname(card->host), card->rca); | |
298 | } | |
4101c16a PO |
299 | device_del(&card->dev); |
300 | } | |
301 | ||
302 | put_device(&card->dev); | |
303 | } | |
304 |