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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"); | |
4101c16a PO |
40 | default: |
41 | return -EFAULT; | |
42 | } | |
43 | } | |
44 | ||
45 | static struct device_attribute mmc_dev_attrs[] = { | |
51ec92e2 | 46 | __ATTR(type, S_IRUGO, mmc_type_show, NULL), |
4101c16a PO |
47 | __ATTR_NULL, |
48 | }; | |
49 | ||
50 | /* | |
51 | * This currently matches any MMC driver to any MMC card - drivers | |
52 | * themselves make the decision whether to drive this card in their | |
53 | * probe method. | |
54 | */ | |
55 | static int mmc_bus_match(struct device *dev, struct device_driver *drv) | |
56 | { | |
57 | return 1; | |
58 | } | |
59 | ||
60 | static int | |
7eff2e7a | 61 | mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
4101c16a PO |
62 | { |
63 | struct mmc_card *card = dev_to_mmc_card(dev); | |
9eb3a94d | 64 | const char *type; |
7eff2e7a | 65 | int retval = 0; |
4101c16a PO |
66 | |
67 | switch (card->type) { | |
68 | case MMC_TYPE_MMC: | |
9eb3a94d | 69 | type = "MMC"; |
4101c16a PO |
70 | break; |
71 | case MMC_TYPE_SD: | |
9eb3a94d | 72 | type = "SD"; |
4101c16a | 73 | break; |
5c4e6f13 | 74 | case MMC_TYPE_SDIO: |
9eb3a94d | 75 | type = "SDIO"; |
5c4e6f13 | 76 | break; |
9eb3a94d PO |
77 | default: |
78 | type = NULL; | |
4101c16a PO |
79 | } |
80 | ||
9eb3a94d | 81 | if (type) { |
7eff2e7a KS |
82 | retval = add_uevent_var(env, "MMC_TYPE=%s", type); |
83 | if (retval) | |
84 | return retval; | |
9eb3a94d | 85 | } |
4101c16a | 86 | |
7eff2e7a | 87 | retval = add_uevent_var(env, "MMC_NAME=%s", mmc_card_name(card)); |
6b0b6285 AW |
88 | if (retval) |
89 | return retval; | |
90 | ||
91 | /* | |
92 | * Request the mmc_block device. Note: that this is a direct request | |
93 | * for the module it carries no information as to what is inserted. | |
94 | */ | |
95 | retval = add_uevent_var(env, "MODALIAS=mmc:block"); | |
4101c16a | 96 | |
7eff2e7a | 97 | return retval; |
4101c16a PO |
98 | } |
99 | ||
100 | static int mmc_bus_probe(struct device *dev) | |
101 | { | |
102 | struct mmc_driver *drv = to_mmc_driver(dev->driver); | |
103 | struct mmc_card *card = dev_to_mmc_card(dev); | |
104 | ||
105 | return drv->probe(card); | |
106 | } | |
107 | ||
108 | static int mmc_bus_remove(struct device *dev) | |
109 | { | |
110 | struct mmc_driver *drv = to_mmc_driver(dev->driver); | |
111 | struct mmc_card *card = dev_to_mmc_card(dev); | |
112 | ||
113 | drv->remove(card); | |
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 | ||
140 | static struct bus_type mmc_bus_type = { | |
141 | .name = "mmc", | |
142 | .dev_attrs = mmc_dev_attrs, | |
143 | .match = mmc_bus_match, | |
144 | .uevent = mmc_bus_uevent, | |
145 | .probe = mmc_bus_probe, | |
146 | .remove = mmc_bus_remove, | |
147 | .suspend = mmc_bus_suspend, | |
148 | .resume = mmc_bus_resume, | |
149 | }; | |
150 | ||
151 | int mmc_register_bus(void) | |
152 | { | |
153 | return bus_register(&mmc_bus_type); | |
154 | } | |
155 | ||
156 | void mmc_unregister_bus(void) | |
157 | { | |
158 | bus_unregister(&mmc_bus_type); | |
159 | } | |
160 | ||
161 | /** | |
162 | * mmc_register_driver - register a media driver | |
163 | * @drv: MMC media driver | |
164 | */ | |
165 | int mmc_register_driver(struct mmc_driver *drv) | |
166 | { | |
167 | drv->drv.bus = &mmc_bus_type; | |
168 | return driver_register(&drv->drv); | |
169 | } | |
170 | ||
171 | EXPORT_SYMBOL(mmc_register_driver); | |
172 | ||
173 | /** | |
174 | * mmc_unregister_driver - unregister a media driver | |
175 | * @drv: MMC media driver | |
176 | */ | |
177 | void mmc_unregister_driver(struct mmc_driver *drv) | |
178 | { | |
179 | drv->drv.bus = &mmc_bus_type; | |
180 | driver_unregister(&drv->drv); | |
181 | } | |
182 | ||
183 | EXPORT_SYMBOL(mmc_unregister_driver); | |
184 | ||
185 | static void mmc_release_card(struct device *dev) | |
186 | { | |
187 | struct mmc_card *card = dev_to_mmc_card(dev); | |
188 | ||
1a632f8c PO |
189 | sdio_free_common_cis(card); |
190 | ||
759bdc7a PO |
191 | if (card->info) |
192 | kfree(card->info); | |
193 | ||
4101c16a PO |
194 | kfree(card); |
195 | } | |
196 | ||
197 | /* | |
198 | * Allocate and initialise a new MMC card structure. | |
199 | */ | |
51ec92e2 | 200 | struct mmc_card *mmc_alloc_card(struct mmc_host *host, struct device_type *type) |
4101c16a PO |
201 | { |
202 | struct mmc_card *card; | |
203 | ||
733cb1e4 | 204 | card = kzalloc(sizeof(struct mmc_card), GFP_KERNEL); |
4101c16a PO |
205 | if (!card) |
206 | return ERR_PTR(-ENOMEM); | |
207 | ||
4101c16a PO |
208 | card->host = host; |
209 | ||
210 | device_initialize(&card->dev); | |
211 | ||
212 | card->dev.parent = mmc_classdev(host); | |
213 | card->dev.bus = &mmc_bus_type; | |
214 | card->dev.release = mmc_release_card; | |
51ec92e2 | 215 | card->dev.type = type; |
4101c16a PO |
216 | |
217 | return card; | |
218 | } | |
219 | ||
220 | /* | |
221 | * Register a new MMC card with the driver model. | |
222 | */ | |
223 | int mmc_add_card(struct mmc_card *card) | |
224 | { | |
225 | int ret; | |
109b5bed | 226 | const char *type; |
4101c16a | 227 | |
d1b26863 | 228 | dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca); |
4101c16a | 229 | |
109b5bed PO |
230 | switch (card->type) { |
231 | case MMC_TYPE_MMC: | |
232 | type = "MMC"; | |
233 | break; | |
234 | case MMC_TYPE_SD: | |
235 | type = "SD"; | |
236 | if (mmc_card_blockaddr(card)) | |
237 | type = "SDHC"; | |
238 | break; | |
5c4e6f13 PO |
239 | case MMC_TYPE_SDIO: |
240 | type = "SDIO"; | |
241 | break; | |
109b5bed PO |
242 | default: |
243 | type = "?"; | |
244 | break; | |
245 | } | |
246 | ||
af517150 DB |
247 | if (mmc_host_is_spi(card->host)) { |
248 | printk(KERN_INFO "%s: new %s%s card on SPI\n", | |
249 | mmc_hostname(card->host), | |
250 | mmc_card_highspeed(card) ? "high speed " : "", | |
251 | type); | |
252 | } else { | |
253 | printk(KERN_INFO "%s: new %s%s card at address %04x\n", | |
254 | mmc_hostname(card->host), | |
255 | mmc_card_highspeed(card) ? "high speed " : "", | |
256 | type, card->rca); | |
257 | } | |
109b5bed | 258 | |
4101c16a PO |
259 | ret = device_add(&card->dev); |
260 | if (ret) | |
261 | return ret; | |
262 | ||
f4b7f927 HS |
263 | #ifdef CONFIG_DEBUG_FS |
264 | mmc_add_card_debugfs(card); | |
265 | #endif | |
266 | ||
4101c16a PO |
267 | mmc_card_set_present(card); |
268 | ||
269 | return 0; | |
270 | } | |
271 | ||
272 | /* | |
273 | * Unregister a new MMC card with the driver model, and | |
274 | * (eventually) free it. | |
275 | */ | |
276 | void mmc_remove_card(struct mmc_card *card) | |
277 | { | |
f4b7f927 HS |
278 | #ifdef CONFIG_DEBUG_FS |
279 | mmc_remove_card_debugfs(card); | |
280 | #endif | |
281 | ||
4101c16a | 282 | if (mmc_card_present(card)) { |
af517150 DB |
283 | if (mmc_host_is_spi(card->host)) { |
284 | printk(KERN_INFO "%s: SPI card removed\n", | |
285 | mmc_hostname(card->host)); | |
286 | } else { | |
287 | printk(KERN_INFO "%s: card %04x removed\n", | |
288 | mmc_hostname(card->host), card->rca); | |
289 | } | |
4101c16a PO |
290 | device_del(&card->dev); |
291 | } | |
292 | ||
293 | put_device(&card->dev); | |
294 | } | |
295 |