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(date, "%02d/%04d\n", card->cid.month, card->cid.year);
38 MMC_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
39 MMC_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
40 MMC_ATTR(manfid, "0x%06x\n", card->cid.manfid);
41 MMC_ATTR(name, "%s\n", card->cid.prod_name);
42 MMC_ATTR(oemid, "0x%04x\n", card->cid.oemid);
43 MMC_ATTR(serial, "0x%08x\n", card->cid.serial);
45 #define MMC_ATTR_RO(name) __ATTR(name, S_IRUGO, mmc_##name##_show, NULL)
47 static struct device_attribute mmc_dev_attrs[] = {
61 static void mmc_release_card(struct device *dev)
63 struct mmc_card *card = dev_to_mmc_card(dev);
69 * This currently matches any MMC driver to any MMC card - drivers
70 * themselves make the decision whether to drive this card in their
71 * probe method. However, we force "bad" cards to fail.
73 static int mmc_bus_match(struct device *dev, struct device_driver *drv)
75 struct mmc_card *card = dev_to_mmc_card(dev);
76 return !mmc_card_bad(card);
80 mmc_bus_hotplug(struct device *dev, char **envp, int num_envp, char *buf,
83 struct mmc_card *card = dev_to_mmc_card(dev);
87 #define add_env(fmt,val) \
89 int len, ret = -ENOMEM; \
92 len = snprintf(buf, buf_size, fmt, val) + 1; \
101 for (i = 0; i < 12; i++)
102 ccc[i] = card->csd.cmdclass & (1 << i) ? '1' : '0';
106 add_env("MMC_CCC=%s", ccc);
107 add_env("MMC_MANFID=%06x", card->cid.manfid);
108 add_env("MMC_NAME=%s", mmc_card_name(card));
109 add_env("MMC_OEMID=%04x", card->cid.oemid);
114 static int mmc_bus_suspend(struct device *dev, pm_message_t state)
116 struct mmc_driver *drv = to_mmc_driver(dev->driver);
117 struct mmc_card *card = dev_to_mmc_card(dev);
120 if (dev->driver && drv->suspend)
121 ret = drv->suspend(card, state);
125 static int mmc_bus_resume(struct device *dev)
127 struct mmc_driver *drv = to_mmc_driver(dev->driver);
128 struct mmc_card *card = dev_to_mmc_card(dev);
131 if (dev->driver && drv->resume)
132 ret = drv->resume(card);
136 static struct bus_type mmc_bus_type = {
138 .dev_attrs = mmc_dev_attrs,
139 .match = mmc_bus_match,
140 .hotplug = mmc_bus_hotplug,
141 .suspend = mmc_bus_suspend,
142 .resume = mmc_bus_resume,
146 static int mmc_drv_probe(struct device *dev)
148 struct mmc_driver *drv = to_mmc_driver(dev->driver);
149 struct mmc_card *card = dev_to_mmc_card(dev);
151 return drv->probe(card);
154 static int mmc_drv_remove(struct device *dev)
156 struct mmc_driver *drv = to_mmc_driver(dev->driver);
157 struct mmc_card *card = dev_to_mmc_card(dev);
166 * mmc_register_driver - register a media driver
167 * @drv: MMC media driver
169 int mmc_register_driver(struct mmc_driver *drv)
171 drv->drv.bus = &mmc_bus_type;
172 drv->drv.probe = mmc_drv_probe;
173 drv->drv.remove = mmc_drv_remove;
174 return driver_register(&drv->drv);
177 EXPORT_SYMBOL(mmc_register_driver);
180 * mmc_unregister_driver - unregister a media driver
181 * @drv: MMC media driver
183 void mmc_unregister_driver(struct mmc_driver *drv)
185 drv->drv.bus = &mmc_bus_type;
186 driver_unregister(&drv->drv);
189 EXPORT_SYMBOL(mmc_unregister_driver);
193 * Internal function. Initialise a MMC card structure.
195 void mmc_init_card(struct mmc_card *card, struct mmc_host *host)
197 memset(card, 0, sizeof(struct mmc_card));
199 device_initialize(&card->dev);
200 card->dev.parent = card->host->dev;
201 card->dev.bus = &mmc_bus_type;
202 card->dev.release = mmc_release_card;
206 * Internal function. Register a new MMC card with the driver model.
208 int mmc_register_card(struct mmc_card *card)
210 snprintf(card->dev.bus_id, sizeof(card->dev.bus_id),
211 "%s:%04x", mmc_hostname(card->host), card->rca);
213 return device_add(&card->dev);
217 * Internal function. Unregister a new MMC card with the
218 * driver model, and (eventually) free it.
220 void mmc_remove_card(struct mmc_card *card)
222 if (mmc_card_present(card))
223 device_del(&card->dev);
225 put_device(&card->dev);
229 static void mmc_host_classdev_release(struct class_device *dev)
231 struct mmc_host *host = cls_dev_to_mmc_host(dev);
235 static struct class mmc_host_class = {
237 .release = mmc_host_classdev_release,
240 static DEFINE_IDR(mmc_host_idr);
241 static DEFINE_SPINLOCK(mmc_host_lock);
244 * Internal function. Allocate a new MMC host.
246 struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev)
248 struct mmc_host *host;
250 host = kmalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL);
252 memset(host, 0, sizeof(struct mmc_host) + extra);
255 host->class_dev.dev = host->dev;
256 host->class_dev.class = &mmc_host_class;
257 class_device_initialize(&host->class_dev);
264 * Internal function. Register a new MMC host with the MMC class.
266 int mmc_add_host_sysfs(struct mmc_host *host)
270 if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL))
273 spin_lock(&mmc_host_lock);
274 err = idr_get_new(&mmc_host_idr, host, &host->index);
275 spin_unlock(&mmc_host_lock);
279 snprintf(host->class_dev.class_id, BUS_ID_SIZE,
280 "mmc%d", host->index);
282 return class_device_add(&host->class_dev);
286 * Internal function. Unregister a MMC host with the MMC class.
288 void mmc_remove_host_sysfs(struct mmc_host *host)
290 class_device_del(&host->class_dev);
292 spin_lock(&mmc_host_lock);
293 idr_remove(&mmc_host_idr, host->index);
294 spin_unlock(&mmc_host_lock);
298 * Internal function. Free a MMC host.
300 void mmc_free_host_sysfs(struct mmc_host *host)
302 class_device_put(&host->class_dev);
306 static int __init mmc_init(void)
308 int ret = bus_register(&mmc_bus_type);
310 ret = class_register(&mmc_host_class);
312 bus_unregister(&mmc_bus_type);
317 static void __exit mmc_exit(void)
319 class_unregister(&mmc_host_class);
320 bus_unregister(&mmc_bus_type);
323 module_init(mmc_init);
324 module_exit(mmc_exit);