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>
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
75 * probe method. However, we force "bad" cards to fail.
77 static int mmc_bus_match(struct device *dev, struct device_driver *drv)
79 struct mmc_card *card = dev_to_mmc_card(dev);
80 return !mmc_card_bad(card);
84 mmc_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf,
87 struct mmc_card *card = dev_to_mmc_card(dev);
91 #define add_env(fmt,val) \
93 int len, ret = -ENOMEM; \
96 len = snprintf(buf, buf_size, fmt, val) + 1; \
105 for (i = 0; i < 12; i++)
106 ccc[i] = card->csd.cmdclass & (1 << i) ? '1' : '0';
110 add_env("MMC_CCC=%s", ccc);
111 add_env("MMC_MANFID=%06x", card->cid.manfid);
112 add_env("MMC_NAME=%s", mmc_card_name(card));
113 add_env("MMC_OEMID=%04x", card->cid.oemid);
118 static int mmc_bus_suspend(struct device *dev, pm_message_t state)
120 struct mmc_driver *drv = to_mmc_driver(dev->driver);
121 struct mmc_card *card = dev_to_mmc_card(dev);
124 if (dev->driver && drv->suspend)
125 ret = drv->suspend(card, state);
129 static int mmc_bus_resume(struct device *dev)
131 struct mmc_driver *drv = to_mmc_driver(dev->driver);
132 struct mmc_card *card = dev_to_mmc_card(dev);
135 if (dev->driver && drv->resume)
136 ret = drv->resume(card);
140 static int mmc_bus_probe(struct device *dev)
142 struct mmc_driver *drv = to_mmc_driver(dev->driver);
143 struct mmc_card *card = dev_to_mmc_card(dev);
145 return drv->probe(card);
148 static int mmc_bus_remove(struct device *dev)
150 struct mmc_driver *drv = to_mmc_driver(dev->driver);
151 struct mmc_card *card = dev_to_mmc_card(dev);
158 static struct bus_type mmc_bus_type = {
160 .dev_attrs = mmc_dev_attrs,
161 .match = mmc_bus_match,
162 .uevent = mmc_bus_uevent,
163 .probe = mmc_bus_probe,
164 .remove = mmc_bus_remove,
165 .suspend = mmc_bus_suspend,
166 .resume = mmc_bus_resume,
170 * mmc_register_driver - register a media driver
171 * @drv: MMC media driver
173 int mmc_register_driver(struct mmc_driver *drv)
175 drv->drv.bus = &mmc_bus_type;
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 = mmc_dev(host);
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)
214 snprintf(card->dev.bus_id, sizeof(card->dev.bus_id),
215 "%s:%04x", mmc_hostname(card->host), card->rca);
217 ret = device_add(&card->dev);
219 if (mmc_card_sd(card)) {
220 ret = device_create_file(&card->dev, &mmc_dev_attr_scr);
222 device_del(&card->dev);
229 * Internal function. Unregister a new MMC card with the
230 * driver model, and (eventually) free it.
232 void mmc_remove_card(struct mmc_card *card)
234 if (mmc_card_present(card)) {
235 if (mmc_card_sd(card))
236 device_remove_file(&card->dev, &mmc_dev_attr_scr);
238 device_del(&card->dev);
241 put_device(&card->dev);
245 static void mmc_host_classdev_release(struct device *dev)
247 struct mmc_host *host = cls_dev_to_mmc_host(dev);
251 static struct class mmc_host_class = {
253 .dev_release = mmc_host_classdev_release,
256 static DEFINE_IDR(mmc_host_idr);
257 static DEFINE_SPINLOCK(mmc_host_lock);
260 * Internal function. Allocate a new MMC host.
262 struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev)
264 struct mmc_host *host;
266 host = kmalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL);
268 memset(host, 0, sizeof(struct mmc_host) + extra);
271 host->class_dev.parent = dev;
272 host->class_dev.class = &mmc_host_class;
273 device_initialize(&host->class_dev);
280 * Internal function. Register a new MMC host with the MMC class.
282 int mmc_add_host_sysfs(struct mmc_host *host)
286 if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL))
289 spin_lock(&mmc_host_lock);
290 err = idr_get_new(&mmc_host_idr, host, &host->index);
291 spin_unlock(&mmc_host_lock);
295 snprintf(host->class_dev.bus_id, BUS_ID_SIZE,
296 "mmc%d", host->index);
298 return device_add(&host->class_dev);
302 * Internal function. Unregister a MMC host with the MMC class.
304 void mmc_remove_host_sysfs(struct mmc_host *host)
306 device_del(&host->class_dev);
308 spin_lock(&mmc_host_lock);
309 idr_remove(&mmc_host_idr, host->index);
310 spin_unlock(&mmc_host_lock);
314 * Internal function. Free a MMC host.
316 void mmc_free_host_sysfs(struct mmc_host *host)
318 put_device(&host->class_dev);
321 static struct workqueue_struct *workqueue;
324 * Internal function. Schedule work in the MMC work queue.
326 int mmc_schedule_work(struct work_struct *work)
328 return queue_work(workqueue, work);
332 * Internal function. Schedule delayed work in the MMC work queue.
334 int mmc_schedule_delayed_work(struct work_struct *work, unsigned long delay)
336 return queue_delayed_work(workqueue, work, delay);
340 * Internal function. Flush all scheduled work from the MMC work queue.
342 void mmc_flush_scheduled_work(void)
344 flush_workqueue(workqueue);
347 static int __init mmc_init(void)
351 workqueue = create_singlethread_workqueue("kmmcd");
355 ret = bus_register(&mmc_bus_type);
357 ret = class_register(&mmc_host_class);
359 bus_unregister(&mmc_bus_type);
364 static void __exit mmc_exit(void)
366 class_unregister(&mmc_host_class);
367 bus_unregister(&mmc_bus_type);
368 destroy_workqueue(workqueue);
371 module_init(mmc_init);
372 module_exit(mmc_exit);