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>
16 #include <linux/mmc/card.h>
17 #include <linux/mmc/host.h>
21 #define dev_to_mmc_card(d) container_of(d, struct mmc_card, dev)
22 #define to_mmc_driver(d) container_of(d, struct mmc_driver, drv)
24 #define MMC_ATTR(name, fmt, args...) \
25 static ssize_t mmc_##name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
27 struct mmc_card *card = dev_to_mmc_card(dev); \
28 return sprintf(buf, fmt, args); \
31 MMC_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
32 card->raw_cid[2], card->raw_cid[3]);
33 MMC_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
34 card->raw_csd[2], card->raw_csd[3]);
35 MMC_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
36 MMC_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
37 MMC_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
38 MMC_ATTR(manfid, "0x%06x\n", card->cid.manfid);
39 MMC_ATTR(name, "%s\n", card->cid.prod_name);
40 MMC_ATTR(oemid, "0x%04x\n", card->cid.oemid);
41 MMC_ATTR(serial, "0x%08x\n", card->cid.serial);
43 #define MMC_ATTR_RO(name) __ATTR(name, S_IRUGO, mmc_##name##_show, NULL)
45 static struct device_attribute mmc_dev_attrs[] = {
59 static void mmc_release_card(struct device *dev)
61 struct mmc_card *card = dev_to_mmc_card(dev);
67 * This currently matches any MMC driver to any MMC card - drivers
68 * themselves make the decision whether to drive this card in their
69 * probe method. However, we force "bad" cards to fail.
71 static int mmc_bus_match(struct device *dev, struct device_driver *drv)
73 struct mmc_card *card = dev_to_mmc_card(dev);
74 return !mmc_card_bad(card);
78 mmc_bus_hotplug(struct device *dev, char **envp, int num_envp, char *buf,
81 struct mmc_card *card = dev_to_mmc_card(dev);
85 #define add_env(fmt,val) \
87 int len, ret = -ENOMEM; \
90 len = snprintf(buf, buf_size, fmt, val) + 1; \
99 for (i = 0; i < 12; i++)
100 ccc[i] = card->csd.cmdclass & (1 << i) ? '1' : '0';
104 add_env("MMC_CCC=%s", ccc);
105 add_env("MMC_MANFID=%06x", card->cid.manfid);
106 add_env("MMC_NAME=%s", mmc_card_name(card));
107 add_env("MMC_OEMID=%04x", card->cid.oemid);
112 static int mmc_bus_suspend(struct device *dev, pm_message_t state)
114 struct mmc_driver *drv = to_mmc_driver(dev->driver);
115 struct mmc_card *card = dev_to_mmc_card(dev);
118 if (dev->driver && drv->suspend)
119 ret = drv->suspend(card, state);
123 static int mmc_bus_resume(struct device *dev)
125 struct mmc_driver *drv = to_mmc_driver(dev->driver);
126 struct mmc_card *card = dev_to_mmc_card(dev);
129 if (dev->driver && drv->resume)
130 ret = drv->resume(card);
134 static struct bus_type mmc_bus_type = {
136 .dev_attrs = mmc_dev_attrs,
137 .match = mmc_bus_match,
138 .hotplug = mmc_bus_hotplug,
139 .suspend = mmc_bus_suspend,
140 .resume = mmc_bus_resume,
144 static int mmc_drv_probe(struct device *dev)
146 struct mmc_driver *drv = to_mmc_driver(dev->driver);
147 struct mmc_card *card = dev_to_mmc_card(dev);
149 return drv->probe(card);
152 static int mmc_drv_remove(struct device *dev)
154 struct mmc_driver *drv = to_mmc_driver(dev->driver);
155 struct mmc_card *card = dev_to_mmc_card(dev);
164 * mmc_register_driver - register a media driver
165 * @drv: MMC media driver
167 int mmc_register_driver(struct mmc_driver *drv)
169 drv->drv.bus = &mmc_bus_type;
170 drv->drv.probe = mmc_drv_probe;
171 drv->drv.remove = mmc_drv_remove;
172 return driver_register(&drv->drv);
175 EXPORT_SYMBOL(mmc_register_driver);
178 * mmc_unregister_driver - unregister a media driver
179 * @drv: MMC media driver
181 void mmc_unregister_driver(struct mmc_driver *drv)
183 drv->drv.bus = &mmc_bus_type;
184 driver_unregister(&drv->drv);
187 EXPORT_SYMBOL(mmc_unregister_driver);
191 * Internal function. Initialise a MMC card structure.
193 void mmc_init_card(struct mmc_card *card, struct mmc_host *host)
195 memset(card, 0, sizeof(struct mmc_card));
197 device_initialize(&card->dev);
198 card->dev.parent = card->host->dev;
199 card->dev.bus = &mmc_bus_type;
200 card->dev.release = mmc_release_card;
204 * Internal function. Register a new MMC card with the driver model.
206 int mmc_register_card(struct mmc_card *card)
208 snprintf(card->dev.bus_id, sizeof(card->dev.bus_id),
209 "%s:%04x", card->host->host_name, card->rca);
211 return device_add(&card->dev);
215 * Internal function. Unregister a new MMC card with the
216 * driver model, and (eventually) free it.
218 void mmc_remove_card(struct mmc_card *card)
220 if (mmc_card_present(card))
221 device_del(&card->dev);
223 put_device(&card->dev);
227 static int __init mmc_init(void)
229 return bus_register(&mmc_bus_type);
232 static void __exit mmc_exit(void)
234 bus_unregister(&mmc_bus_type);
237 module_init(mmc_init);
238 module_exit(mmc_exit);