2 * linux/drivers/mmc/mmc_sysfs.c
4 * Copyright (C) 2003 Russell King, All Rights Reserved.
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.
10 * MMC sysfs/driver model support.
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/device.h>
15 #include <linux/idr.h>
17 #include <linux/mmc/card.h>
18 #include <linux/mmc/host.h>
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)
24 #define cls_dev_to_mmc_host(d) container_of(d, struct mmc_host, class_dev)
26 #define MMC_ATTR(name, fmt, args...) \
27 static ssize_t mmc_##name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
29 struct mmc_card *card = dev_to_mmc_card(dev); \
30 return sprintf(buf, fmt, args); \
33 MMC_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
34 card->raw_cid[2], card->raw_cid[3]);
35 MMC_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
36 card->raw_csd[2], card->raw_csd[3]);
37 MMC_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
38 MMC_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
39 MMC_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
40 MMC_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
41 MMC_ATTR(manfid, "0x%06x\n", card->cid.manfid);
42 MMC_ATTR(name, "%s\n", card->cid.prod_name);
43 MMC_ATTR(oemid, "0x%04x\n", card->cid.oemid);
44 MMC_ATTR(serial, "0x%08x\n", card->cid.serial);
46 #define MMC_ATTR_RO(name) __ATTR(name, S_IRUGO, mmc_##name##_show, NULL)
48 static struct device_attribute mmc_dev_attrs[] = {
63 static void mmc_release_card(struct device *dev)
65 struct mmc_card *card = dev_to_mmc_card(dev);
71 * This currently matches any MMC driver to any MMC card - drivers
72 * themselves make the decision whether to drive this card in their
73 * probe method. However, we force "bad" cards to fail.
75 static int mmc_bus_match(struct device *dev, struct device_driver *drv)
77 struct mmc_card *card = dev_to_mmc_card(dev);
78 return !mmc_card_bad(card);
82 mmc_bus_hotplug(struct device *dev, char **envp, int num_envp, char *buf,
85 struct mmc_card *card = dev_to_mmc_card(dev);
89 #define add_env(fmt,val) \
91 int len, ret = -ENOMEM; \
94 len = snprintf(buf, buf_size, fmt, val) + 1; \
103 for (i = 0; i < 12; i++)
104 ccc[i] = card->csd.cmdclass & (1 << i) ? '1' : '0';
108 add_env("MMC_CCC=%s", ccc);
109 add_env("MMC_MANFID=%06x", card->cid.manfid);
110 add_env("MMC_NAME=%s", mmc_card_name(card));
111 add_env("MMC_OEMID=%04x", card->cid.oemid);
116 static int mmc_bus_suspend(struct device *dev, pm_message_t state)
118 struct mmc_driver *drv = to_mmc_driver(dev->driver);
119 struct mmc_card *card = dev_to_mmc_card(dev);
122 if (dev->driver && drv->suspend)
123 ret = drv->suspend(card, state);
127 static int mmc_bus_resume(struct device *dev)
129 struct mmc_driver *drv = to_mmc_driver(dev->driver);
130 struct mmc_card *card = dev_to_mmc_card(dev);
133 if (dev->driver && drv->resume)
134 ret = drv->resume(card);
138 static struct bus_type mmc_bus_type = {
140 .dev_attrs = mmc_dev_attrs,
141 .match = mmc_bus_match,
142 .hotplug = mmc_bus_hotplug,
143 .suspend = mmc_bus_suspend,
144 .resume = mmc_bus_resume,
148 static int mmc_drv_probe(struct device *dev)
150 struct mmc_driver *drv = to_mmc_driver(dev->driver);
151 struct mmc_card *card = dev_to_mmc_card(dev);
153 return drv->probe(card);
156 static int mmc_drv_remove(struct device *dev)
158 struct mmc_driver *drv = to_mmc_driver(dev->driver);
159 struct mmc_card *card = dev_to_mmc_card(dev);
168 * mmc_register_driver - register a media driver
169 * @drv: MMC media driver
171 int mmc_register_driver(struct mmc_driver *drv)
173 drv->drv.bus = &mmc_bus_type;
174 drv->drv.probe = mmc_drv_probe;
175 drv->drv.remove = mmc_drv_remove;
176 return driver_register(&drv->drv);
179 EXPORT_SYMBOL(mmc_register_driver);
182 * mmc_unregister_driver - unregister a media driver
183 * @drv: MMC media driver
185 void mmc_unregister_driver(struct mmc_driver *drv)
187 drv->drv.bus = &mmc_bus_type;
188 driver_unregister(&drv->drv);
191 EXPORT_SYMBOL(mmc_unregister_driver);
195 * Internal function. Initialise a MMC card structure.
197 void mmc_init_card(struct mmc_card *card, struct mmc_host *host)
199 memset(card, 0, sizeof(struct mmc_card));
201 device_initialize(&card->dev);
202 card->dev.parent = card->host->dev;
203 card->dev.bus = &mmc_bus_type;
204 card->dev.release = mmc_release_card;
208 * Internal function. Register a new MMC card with the driver model.
210 int mmc_register_card(struct mmc_card *card)
212 snprintf(card->dev.bus_id, sizeof(card->dev.bus_id),
213 "%s:%04x", mmc_hostname(card->host), card->rca);
215 return device_add(&card->dev);
219 * Internal function. Unregister a new MMC card with the
220 * driver model, and (eventually) free it.
222 void mmc_remove_card(struct mmc_card *card)
224 if (mmc_card_present(card))
225 device_del(&card->dev);
227 put_device(&card->dev);
231 static void mmc_host_classdev_release(struct class_device *dev)
233 struct mmc_host *host = cls_dev_to_mmc_host(dev);
237 static struct class mmc_host_class = {
239 .release = mmc_host_classdev_release,
242 static DEFINE_IDR(mmc_host_idr);
243 static DEFINE_SPINLOCK(mmc_host_lock);
246 * Internal function. Allocate a new MMC host.
248 struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev)
250 struct mmc_host *host;
252 host = kmalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL);
254 memset(host, 0, sizeof(struct mmc_host) + extra);
257 host->class_dev.dev = host->dev;
258 host->class_dev.class = &mmc_host_class;
259 class_device_initialize(&host->class_dev);
266 * Internal function. Register a new MMC host with the MMC class.
268 int mmc_add_host_sysfs(struct mmc_host *host)
272 if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL))
275 spin_lock(&mmc_host_lock);
276 err = idr_get_new(&mmc_host_idr, host, &host->index);
277 spin_unlock(&mmc_host_lock);
281 snprintf(host->class_dev.class_id, BUS_ID_SIZE,
282 "mmc%d", host->index);
284 return class_device_add(&host->class_dev);
288 * Internal function. Unregister a MMC host with the MMC class.
290 void mmc_remove_host_sysfs(struct mmc_host *host)
292 class_device_del(&host->class_dev);
294 spin_lock(&mmc_host_lock);
295 idr_remove(&mmc_host_idr, host->index);
296 spin_unlock(&mmc_host_lock);
300 * Internal function. Free a MMC host.
302 void mmc_free_host_sysfs(struct mmc_host *host)
304 class_device_put(&host->class_dev);
308 static int __init mmc_init(void)
310 int ret = bus_register(&mmc_bus_type);
312 ret = class_register(&mmc_host_class);
314 bus_unregister(&mmc_bus_type);
319 static void __exit mmc_exit(void)
321 class_unregister(&mmc_host_class);
322 bus_unregister(&mmc_bus_type);
325 module_init(mmc_init);
326 module_exit(mmc_exit);