2 * linux/drivers/mmc/core/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>
16 #include <linux/workqueue.h>
18 #include <linux/mmc/card.h>
19 #include <linux/mmc/host.h>
23 #define dev_to_mmc_card(d) container_of(d, struct mmc_card, dev)
24 #define to_mmc_driver(d) container_of(d, struct mmc_driver, drv)
25 #define cls_dev_to_mmc_host(d) container_of(d, struct mmc_host, class_dev)
27 #define MMC_ATTR(name, fmt, args...) \
28 static ssize_t mmc_##name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
30 struct mmc_card *card = dev_to_mmc_card(dev); \
31 return sprintf(buf, fmt, args); \
34 MMC_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
35 card->raw_cid[2], card->raw_cid[3]);
36 MMC_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
37 card->raw_csd[2], card->raw_csd[3]);
38 MMC_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
39 MMC_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
40 MMC_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
41 MMC_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
42 MMC_ATTR(manfid, "0x%06x\n", card->cid.manfid);
43 MMC_ATTR(name, "%s\n", card->cid.prod_name);
44 MMC_ATTR(oemid, "0x%04x\n", card->cid.oemid);
45 MMC_ATTR(serial, "0x%08x\n", card->cid.serial);
47 #define MMC_ATTR_RO(name) __ATTR(name, S_IRUGO, mmc_##name##_show, NULL)
49 static struct device_attribute mmc_dev_attrs[] = {
62 static struct device_attribute mmc_dev_attr_scr = MMC_ATTR_RO(scr);
65 static void mmc_release_card(struct device *dev)
67 struct mmc_card *card = dev_to_mmc_card(dev);
73 * This currently matches any MMC driver to any MMC card - drivers
74 * themselves make the decision whether to drive this card in their
77 static int mmc_bus_match(struct device *dev, struct device_driver *drv)
83 mmc_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf,
86 struct mmc_card *card = dev_to_mmc_card(dev);
88 int retval = 0, i = 0, length = 0;
90 #define add_env(fmt,val) do { \
91 retval = add_uevent_var(envp, num_envp, &i, \
92 buf, buf_size, &length, \
98 for (i = 0; i < 12; i++)
99 ccc[i] = card->csd.cmdclass & (1 << i) ? '1' : '0';
102 add_env("MMC_CCC=%s", ccc);
103 add_env("MMC_MANFID=%06x", card->cid.manfid);
104 add_env("MMC_NAME=%s", mmc_card_name(card));
105 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 int mmc_bus_probe(struct device *dev)
136 struct mmc_driver *drv = to_mmc_driver(dev->driver);
137 struct mmc_card *card = dev_to_mmc_card(dev);
139 return drv->probe(card);
142 static int mmc_bus_remove(struct device *dev)
144 struct mmc_driver *drv = to_mmc_driver(dev->driver);
145 struct mmc_card *card = dev_to_mmc_card(dev);
152 static struct bus_type mmc_bus_type = {
154 .dev_attrs = mmc_dev_attrs,
155 .match = mmc_bus_match,
156 .uevent = mmc_bus_uevent,
157 .probe = mmc_bus_probe,
158 .remove = mmc_bus_remove,
159 .suspend = mmc_bus_suspend,
160 .resume = mmc_bus_resume,
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 return driver_register(&drv->drv);
173 EXPORT_SYMBOL(mmc_register_driver);
176 * mmc_unregister_driver - unregister a media driver
177 * @drv: MMC media driver
179 void mmc_unregister_driver(struct mmc_driver *drv)
181 drv->drv.bus = &mmc_bus_type;
182 driver_unregister(&drv->drv);
185 EXPORT_SYMBOL(mmc_unregister_driver);
189 * Internal function. Initialise a MMC card structure.
191 void mmc_init_card(struct mmc_card *card, struct mmc_host *host)
193 memset(card, 0, sizeof(struct mmc_card));
195 device_initialize(&card->dev);
196 card->dev.parent = mmc_classdev(host);
197 card->dev.bus = &mmc_bus_type;
198 card->dev.release = mmc_release_card;
202 * Internal function. Register a new MMC card with the driver model.
204 int mmc_register_card(struct mmc_card *card)
208 snprintf(card->dev.bus_id, sizeof(card->dev.bus_id),
209 "%s:%04x", mmc_hostname(card->host), card->rca);
211 ret = device_add(&card->dev);
213 if (mmc_card_sd(card)) {
214 ret = device_create_file(&card->dev, &mmc_dev_attr_scr);
216 device_del(&card->dev);
220 mmc_card_set_present(card);
225 * Internal function. Unregister a new MMC card with the
226 * driver model, and (eventually) free it.
228 void mmc_remove_card(struct mmc_card *card)
230 if (mmc_card_present(card)) {
231 if (mmc_card_sd(card))
232 device_remove_file(&card->dev, &mmc_dev_attr_scr);
234 device_del(&card->dev);
237 put_device(&card->dev);
241 static void mmc_host_classdev_release(struct device *dev)
243 struct mmc_host *host = cls_dev_to_mmc_host(dev);
247 static struct class mmc_host_class = {
249 .dev_release = mmc_host_classdev_release,
252 static DEFINE_IDR(mmc_host_idr);
253 static DEFINE_SPINLOCK(mmc_host_lock);
256 * Internal function. Allocate a new MMC host.
258 struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev)
260 struct mmc_host *host;
262 host = kmalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL);
264 memset(host, 0, sizeof(struct mmc_host) + extra);
267 host->class_dev.parent = dev;
268 host->class_dev.class = &mmc_host_class;
269 device_initialize(&host->class_dev);
276 * Internal function. Register a new MMC host with the MMC class.
278 int mmc_add_host_sysfs(struct mmc_host *host)
282 if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL))
285 spin_lock(&mmc_host_lock);
286 err = idr_get_new(&mmc_host_idr, host, &host->index);
287 spin_unlock(&mmc_host_lock);
291 snprintf(host->class_dev.bus_id, BUS_ID_SIZE,
292 "mmc%d", host->index);
294 return device_add(&host->class_dev);
298 * Internal function. Unregister a MMC host with the MMC class.
300 void mmc_remove_host_sysfs(struct mmc_host *host)
302 device_del(&host->class_dev);
304 spin_lock(&mmc_host_lock);
305 idr_remove(&mmc_host_idr, host->index);
306 spin_unlock(&mmc_host_lock);
310 * Internal function. Free a MMC host.
312 void mmc_free_host_sysfs(struct mmc_host *host)
314 put_device(&host->class_dev);
317 static struct workqueue_struct *workqueue;
320 * Internal function. Schedule delayed work in the MMC work queue.
322 int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay)
324 return queue_delayed_work(workqueue, work, delay);
328 * Internal function. Flush all scheduled work from the MMC work queue.
330 void mmc_flush_scheduled_work(void)
332 flush_workqueue(workqueue);
335 static int __init mmc_init(void)
339 workqueue = create_singlethread_workqueue("kmmcd");
343 ret = bus_register(&mmc_bus_type);
345 ret = class_register(&mmc_host_class);
347 bus_unregister(&mmc_bus_type);
352 static void __exit mmc_exit(void)
354 class_unregister(&mmc_host_class);
355 bus_unregister(&mmc_bus_type);
356 destroy_workqueue(workqueue);
359 module_init(mmc_init);
360 module_exit(mmc_exit);