blob: 3f4a66ca9555e6c354c468266d22609adf56c628 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Russell Kingdce77372005-08-19 09:42:52 +010015#include <linux/idr.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
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)
Russell King00b137c2005-08-19 09:41:24 +010024#define cls_dev_to_mmc_host(d) container_of(d, struct mmc_host, class_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
26#define MMC_ATTR(name, fmt, args...) \
Yani Ioannoue404e272005-05-17 06:42:58 -040027static ssize_t mmc_##name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -070028{ \
29 struct mmc_card *card = dev_to_mmc_card(dev); \
30 return sprintf(buf, fmt, args); \
31}
32
33MMC_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
34 card->raw_cid[2], card->raw_cid[3]);
35MMC_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
36 card->raw_csd[2], card->raw_csd[3]);
Pierre Ossmana9c43422005-09-06 15:18:54 -070037MMC_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
Linus Torvalds1da177e2005-04-16 15:20:36 -070038MMC_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
39MMC_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
40MMC_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
41MMC_ATTR(manfid, "0x%06x\n", card->cid.manfid);
42MMC_ATTR(name, "%s\n", card->cid.prod_name);
43MMC_ATTR(oemid, "0x%04x\n", card->cid.oemid);
44MMC_ATTR(serial, "0x%08x\n", card->cid.serial);
45
46#define MMC_ATTR_RO(name) __ATTR(name, S_IRUGO, mmc_##name##_show, NULL)
47
48static 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
Pierre Ossman4bc20a82005-09-06 15:18:58 -070061static struct device_attribute mmc_dev_attr_scr = MMC_ATTR_RO(scr);
62
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
64static 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 */
76static 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
82static int
83mmc_bus_hotplug(struct device *dev, char **envp, int num_envp, char *buf,
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
117static 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
128static 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
139static struct bus_type mmc_bus_type = {
140 .name = "mmc",
141 .dev_attrs = mmc_dev_attrs,
142 .match = mmc_bus_match,
143 .hotplug = mmc_bus_hotplug,
144 .suspend = mmc_bus_suspend,
145 .resume = mmc_bus_resume,
146};
147
148
149static 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
157static 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 */
172int 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
180EXPORT_SYMBOL(mmc_register_driver);
181
182/**
183 * mmc_unregister_driver - unregister a media driver
184 * @drv: MMC media driver
185 */
186void mmc_unregister_driver(struct mmc_driver *drv)
187{
188 drv->drv.bus = &mmc_bus_type;
189 driver_unregister(&drv->drv);
190}
191
192EXPORT_SYMBOL(mmc_unregister_driver);
193
194
195/*
196 * Internal function. Initialise a MMC card structure.
197 */
198void 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 */
211int mmc_register_card(struct mmc_card *card)
212{
Pierre Ossman4bc20a82005-09-06 15:18:58 -0700213 int ret;
214
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 snprintf(card->dev.bus_id, sizeof(card->dev.bus_id),
Russell Kingd366b642005-08-19 09:40:08 +0100216 "%s:%04x", mmc_hostname(card->host), card->rca);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217
Pierre Ossman4bc20a82005-09-06 15:18:58 -0700218 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227}
228
229/*
230 * Internal function. Unregister a new MMC card with the
231 * driver model, and (eventually) free it.
232 */
233void mmc_remove_card(struct mmc_card *card)
234{
Pierre Ossman4bc20a82005-09-06 15:18:58 -0700235 if (mmc_card_present(card)) {
236 if (mmc_card_sd(card))
237 device_remove_file(&card->dev, &mmc_dev_attr_scr);
238
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 device_del(&card->dev);
Pierre Ossman4bc20a82005-09-06 15:18:58 -0700240 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
242 put_device(&card->dev);
243}
244
245
Russell King00b137c2005-08-19 09:41:24 +0100246static 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
252static struct class mmc_host_class = {
253 .name = "mmc_host",
254 .release = mmc_host_classdev_release,
255};
256
Russell Kingdce77372005-08-19 09:42:52 +0100257static DEFINE_IDR(mmc_host_idr);
258static DEFINE_SPINLOCK(mmc_host_lock);
259
Russell King00b137c2005-08-19 09:41:24 +0100260/*
261 * Internal function. Allocate a new MMC host.
262 */
263struct 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 */
283int mmc_add_host_sysfs(struct mmc_host *host)
284{
Russell Kingdce77372005-08-19 09:42:52 +0100285 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;
Russell King00b137c2005-08-19 09:41:24 +0100295
Russell King1ad434d2005-08-19 09:42:21 +0100296 snprintf(host->class_dev.class_id, BUS_ID_SIZE,
Russell Kingdce77372005-08-19 09:42:52 +0100297 "mmc%d", host->index);
Russell King00b137c2005-08-19 09:41:24 +0100298
Russell King00b137c2005-08-19 09:41:24 +0100299 return class_device_add(&host->class_dev);
300}
301
302/*
303 * Internal function. Unregister a MMC host with the MMC class.
304 */
305void mmc_remove_host_sysfs(struct mmc_host *host)
306{
307 class_device_del(&host->class_dev);
Russell Kingdce77372005-08-19 09:42:52 +0100308
309 spin_lock(&mmc_host_lock);
310 idr_remove(&mmc_host_idr, host->index);
311 spin_unlock(&mmc_host_lock);
Russell King00b137c2005-08-19 09:41:24 +0100312}
313
314/*
315 * Internal function. Free a MMC host.
316 */
317void mmc_free_host_sysfs(struct mmc_host *host)
318{
319 class_device_put(&host->class_dev);
320}
321
322
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323static int __init mmc_init(void)
324{
Russell King00b137c2005-08-19 09:41:24 +0100325 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332}
333
334static void __exit mmc_exit(void)
335{
Russell King00b137c2005-08-19 09:41:24 +0100336 class_unregister(&mmc_host_class);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 bus_unregister(&mmc_bus_type);
338}
339
340module_init(mmc_init);
341module_exit(mmc_exit);