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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> | |
16 | ||
17 | #include <linux/mmc/card.h> | |
18 | #include <linux/mmc/host.h> | |
19 | ||
20 | #include "sysfs.h" | |
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[] = { | |
46 | MMC_ATTR_RO(type), | |
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 | |
61 | mmc_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf, | |
62 | int buf_size) | |
63 | { | |
64 | struct mmc_card *card = dev_to_mmc_card(dev); | |
9eb3a94d PO |
65 | const char *type; |
66 | int i = 0, length = 0; | |
4101c16a PO |
67 | |
68 | switch (card->type) { | |
69 | case MMC_TYPE_MMC: | |
9eb3a94d | 70 | type = "MMC"; |
4101c16a PO |
71 | break; |
72 | case MMC_TYPE_SD: | |
9eb3a94d | 73 | type = "SD"; |
4101c16a | 74 | break; |
5c4e6f13 | 75 | case MMC_TYPE_SDIO: |
9eb3a94d | 76 | type = "SDIO"; |
5c4e6f13 | 77 | break; |
9eb3a94d PO |
78 | default: |
79 | type = NULL; | |
4101c16a PO |
80 | } |
81 | ||
9eb3a94d PO |
82 | if (type) { |
83 | if (add_uevent_var(envp, num_envp, &i, | |
84 | buf, buf_size, &length, | |
85 | "MMC_TYPE=%s", type)) | |
86 | return -ENOMEM; | |
87 | } | |
4101c16a | 88 | |
9eb3a94d PO |
89 | if (add_uevent_var(envp, num_envp, &i, |
90 | buf, buf_size, &length, | |
91 | "MMC_NAME=%s", mmc_card_name(card))) | |
92 | return -ENOMEM; | |
4101c16a PO |
93 | |
94 | envp[i] = NULL; | |
95 | ||
96 | return 0; | |
97 | } | |
98 | ||
99 | static int mmc_bus_probe(struct device *dev) | |
100 | { | |
101 | struct mmc_driver *drv = to_mmc_driver(dev->driver); | |
102 | struct mmc_card *card = dev_to_mmc_card(dev); | |
103 | ||
104 | return drv->probe(card); | |
105 | } | |
106 | ||
107 | static int mmc_bus_remove(struct device *dev) | |
108 | { | |
109 | struct mmc_driver *drv = to_mmc_driver(dev->driver); | |
110 | struct mmc_card *card = dev_to_mmc_card(dev); | |
111 | ||
112 | drv->remove(card); | |
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, | |
143 | .uevent = mmc_bus_uevent, | |
144 | .probe = mmc_bus_probe, | |
145 | .remove = mmc_bus_remove, | |
146 | .suspend = mmc_bus_suspend, | |
147 | .resume = mmc_bus_resume, | |
148 | }; | |
149 | ||
150 | int mmc_register_bus(void) | |
151 | { | |
152 | return bus_register(&mmc_bus_type); | |
153 | } | |
154 | ||
155 | void mmc_unregister_bus(void) | |
156 | { | |
157 | bus_unregister(&mmc_bus_type); | |
158 | } | |
159 | ||
160 | /** | |
161 | * mmc_register_driver - register a media driver | |
162 | * @drv: MMC media driver | |
163 | */ | |
164 | int mmc_register_driver(struct mmc_driver *drv) | |
165 | { | |
166 | drv->drv.bus = &mmc_bus_type; | |
167 | return driver_register(&drv->drv); | |
168 | } | |
169 | ||
170 | EXPORT_SYMBOL(mmc_register_driver); | |
171 | ||
172 | /** | |
173 | * mmc_unregister_driver - unregister a media driver | |
174 | * @drv: MMC media driver | |
175 | */ | |
176 | void mmc_unregister_driver(struct mmc_driver *drv) | |
177 | { | |
178 | drv->drv.bus = &mmc_bus_type; | |
179 | driver_unregister(&drv->drv); | |
180 | } | |
181 | ||
182 | EXPORT_SYMBOL(mmc_unregister_driver); | |
183 | ||
184 | static void mmc_release_card(struct device *dev) | |
185 | { | |
186 | struct mmc_card *card = dev_to_mmc_card(dev); | |
187 | ||
1a632f8c PO |
188 | sdio_free_common_cis(card); |
189 | ||
4101c16a PO |
190 | kfree(card); |
191 | } | |
192 | ||
193 | /* | |
194 | * Allocate and initialise a new MMC card structure. | |
195 | */ | |
196 | struct mmc_card *mmc_alloc_card(struct mmc_host *host) | |
197 | { | |
198 | struct mmc_card *card; | |
199 | ||
733cb1e4 | 200 | card = kzalloc(sizeof(struct mmc_card), GFP_KERNEL); |
4101c16a PO |
201 | if (!card) |
202 | return ERR_PTR(-ENOMEM); | |
203 | ||
4101c16a PO |
204 | card->host = host; |
205 | ||
206 | device_initialize(&card->dev); | |
207 | ||
208 | card->dev.parent = mmc_classdev(host); | |
209 | card->dev.bus = &mmc_bus_type; | |
210 | card->dev.release = mmc_release_card; | |
211 | ||
212 | return card; | |
213 | } | |
214 | ||
215 | /* | |
216 | * Register a new MMC card with the driver model. | |
217 | */ | |
218 | int mmc_add_card(struct mmc_card *card) | |
219 | { | |
220 | int ret; | |
109b5bed | 221 | const char *type; |
4101c16a PO |
222 | |
223 | snprintf(card->dev.bus_id, sizeof(card->dev.bus_id), | |
224 | "%s:%04x", mmc_hostname(card->host), card->rca); | |
225 | ||
109b5bed PO |
226 | switch (card->type) { |
227 | case MMC_TYPE_MMC: | |
228 | type = "MMC"; | |
229 | break; | |
230 | case MMC_TYPE_SD: | |
231 | type = "SD"; | |
232 | if (mmc_card_blockaddr(card)) | |
233 | type = "SDHC"; | |
234 | break; | |
5c4e6f13 PO |
235 | case MMC_TYPE_SDIO: |
236 | type = "SDIO"; | |
237 | break; | |
109b5bed PO |
238 | default: |
239 | type = "?"; | |
240 | break; | |
241 | } | |
242 | ||
243 | printk(KERN_INFO "%s: new %s%s card at address %04x\n", | |
244 | mmc_hostname(card->host), | |
245 | mmc_card_highspeed(card) ? "high speed " : "", | |
246 | type, card->rca); | |
247 | ||
4101c16a PO |
248 | card->dev.uevent_suppress = 1; |
249 | ||
250 | ret = device_add(&card->dev); | |
251 | if (ret) | |
252 | return ret; | |
253 | ||
254 | if (card->host->bus_ops->sysfs_add) { | |
255 | ret = card->host->bus_ops->sysfs_add(card->host, card); | |
256 | if (ret) { | |
257 | device_del(&card->dev); | |
258 | return ret; | |
259 | } | |
260 | } | |
261 | ||
262 | card->dev.uevent_suppress = 0; | |
263 | ||
264 | kobject_uevent(&card->dev.kobj, KOBJ_ADD); | |
265 | ||
266 | mmc_card_set_present(card); | |
267 | ||
268 | return 0; | |
269 | } | |
270 | ||
271 | /* | |
272 | * Unregister a new MMC card with the driver model, and | |
273 | * (eventually) free it. | |
274 | */ | |
275 | void mmc_remove_card(struct mmc_card *card) | |
276 | { | |
277 | if (mmc_card_present(card)) { | |
109b5bed PO |
278 | printk(KERN_INFO "%s: card %04x removed\n", |
279 | mmc_hostname(card->host), card->rca); | |
280 | ||
4101c16a PO |
281 | if (card->host->bus_ops->sysfs_remove) |
282 | card->host->bus_ops->sysfs_remove(card->host, card); | |
283 | device_del(&card->dev); | |
284 | } | |
285 | ||
286 | put_device(&card->dev); | |
287 | } | |
288 |