[net-next-2.6.git] / drivers / mmc / mmc_sysfs.c

/*
 *  linux/drivers/mmc/mmc_sysfs.c
 *
 *  Copyright (C) 2003 Russell King, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 *  MMC sysfs/driver model support.
 */
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/idr.h>
#include <linux/workqueue.h>

#include <linux/mmc/card.h>
#include <linux/mmc/host.h>

#include "mmc.h"

#define dev_to_mmc_card(d)	container_of(d, struct mmc_card, dev)
#define to_mmc_driver(d)	container_of(d, struct mmc_driver, drv)
#define cls_dev_to_mmc_host(d)	container_of(d, struct mmc_host, class_dev)

#define MMC_ATTR(name, fmt, args...)					\
static ssize_t mmc_##name##_show (struct device *dev, struct device_attribute *attr, char *buf)	\
{									\
	struct mmc_card *card = dev_to_mmc_card(dev);			\
	return sprintf(buf, fmt, args);					\
}

MMC_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
	card->raw_cid[2], card->raw_cid[3]);
MMC_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
	card->raw_csd[2], card->raw_csd[3]);
MMC_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
MMC_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
MMC_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
MMC_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
MMC_ATTR(manfid, "0x%06x\n", card->cid.manfid);
MMC_ATTR(name, "%s\n", card->cid.prod_name);
MMC_ATTR(oemid, "0x%04x\n", card->cid.oemid);
MMC_ATTR(serial, "0x%08x\n", card->cid.serial);

#define MMC_ATTR_RO(name) __ATTR(name, S_IRUGO, mmc_##name##_show, NULL)

static struct device_attribute mmc_dev_attrs[] = {
	MMC_ATTR_RO(cid),
	MMC_ATTR_RO(csd),
	MMC_ATTR_RO(date),
	MMC_ATTR_RO(fwrev),
	MMC_ATTR_RO(hwrev),
	MMC_ATTR_RO(manfid),
	MMC_ATTR_RO(name),
	MMC_ATTR_RO(oemid),
	MMC_ATTR_RO(serial),
	__ATTR_NULL
};

static struct device_attribute mmc_dev_attr_scr = MMC_ATTR_RO(scr);


static void mmc_release_card(struct device *dev)
{
	struct mmc_card *card = dev_to_mmc_card(dev);

	kfree(card);
}

/*
 * This currently matches any MMC driver to any MMC card - drivers
 * themselves make the decision whether to drive this card in their
 * probe method.  However, we force "bad" cards to fail.
 */
static int mmc_bus_match(struct device *dev, struct device_driver *drv)
{
	struct mmc_card *card = dev_to_mmc_card(dev);
	return !mmc_card_bad(card);
}

static int
mmc_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf,
		int buf_size)
{
	struct mmc_card *card = dev_to_mmc_card(dev);
	char ccc[13];
	int i = 0;

#define add_env(fmt,val)						\
	({								\
		int len, ret = -ENOMEM;					\
		if (i < num_envp) {					\
			envp[i++] = buf;				\
			len = snprintf(buf, buf_size, fmt, val) + 1;	\
			buf_size -= len;				\
			buf += len;					\
			if (buf_size >= 0)				\
				ret = 0;				\
		}							\
		ret;							\
	})

	for (i = 0; i < 12; i++)
		ccc[i] = card->csd.cmdclass & (1 << i) ? '1' : '0';
	ccc[12] = '\0';

	i = 0;
	add_env("MMC_CCC=%s", ccc);
	add_env("MMC_MANFID=%06x", card->cid.manfid);
	add_env("MMC_NAME=%s", mmc_card_name(card));
	add_env("MMC_OEMID=%04x", card->cid.oemid);

	return 0;
}

static int mmc_bus_suspend(struct device *dev, pm_message_t state)
{
	struct mmc_driver *drv = to_mmc_driver(dev->driver);
	struct mmc_card *card = dev_to_mmc_card(dev);
	int ret = 0;

	if (dev->driver && drv->suspend)
		ret = drv->suspend(card, state);
	return ret;
}

static int mmc_bus_resume(struct device *dev)
{
	struct mmc_driver *drv = to_mmc_driver(dev->driver);
	struct mmc_card *card = dev_to_mmc_card(dev);
	int ret = 0;

	if (dev->driver && drv->resume)
		ret = drv->resume(card);
	return ret;
}

static int mmc_bus_probe(struct device *dev)
{
	struct mmc_driver *drv = to_mmc_driver(dev->driver);
	struct mmc_card *card = dev_to_mmc_card(dev);

	return drv->probe(card);
}

static int mmc_bus_remove(struct device *dev)
{
	struct mmc_driver *drv = to_mmc_driver(dev->driver);
	struct mmc_card *card = dev_to_mmc_card(dev);

	drv->remove(card);

	return 0;
}

static struct bus_type mmc_bus_type = {
	.name		= "mmc",
	.dev_attrs	= mmc_dev_attrs,
	.match		= mmc_bus_match,
	.uevent		= mmc_bus_uevent,
	.probe		= mmc_bus_probe,
	.remove		= mmc_bus_remove,
	.suspend	= mmc_bus_suspend,
	.resume		= mmc_bus_resume,
};

/**
 *	mmc_register_driver - register a media driver
 *	@drv: MMC media driver
 */
int mmc_register_driver(struct mmc_driver *drv)
{
	drv->drv.bus = &mmc_bus_type;
	return driver_register(&drv->drv);
}

EXPORT_SYMBOL(mmc_register_driver);

/**
 *	mmc_unregister_driver - unregister a media driver
 *	@drv: MMC media driver
 */
void mmc_unregister_driver(struct mmc_driver *drv)
{
	drv->drv.bus = &mmc_bus_type;
	driver_unregister(&drv->drv);
}

EXPORT_SYMBOL(mmc_unregister_driver);


/*
 * Internal function.  Initialise a MMC card structure.
 */
void mmc_init_card(struct mmc_card *card, struct mmc_host *host)
{
	memset(card, 0, sizeof(struct mmc_card));
	card->host = host;
	device_initialize(&card->dev);
	card->dev.parent = card->host->dev;
	card->dev.bus = &mmc_bus_type;
	card->dev.release = mmc_release_card;
}

/*
 * Internal function.  Register a new MMC card with the driver model.
 */
int mmc_register_card(struct mmc_card *card)
{
	int ret;

	snprintf(card->dev.bus_id, sizeof(card->dev.bus_id),
		 "%s:%04x", mmc_hostname(card->host), card->rca);

	ret = device_add(&card->dev);
	if (ret == 0) {
		if (mmc_card_sd(card)) {
			ret = device_create_file(&card->dev, &mmc_dev_attr_scr);
			if (ret)
				device_del(&card->dev);
		}
	}
	return ret;
}

/*
 * Internal function.  Unregister a new MMC card with the
 * driver model, and (eventually) free it.
 */
void mmc_remove_card(struct mmc_card *card)
{
	if (mmc_card_present(card)) {
		if (mmc_card_sd(card))
			device_remove_file(&card->dev, &mmc_dev_attr_scr);

		device_del(&card->dev);
	}

	put_device(&card->dev);
}


static void mmc_host_classdev_release(struct class_device *dev)
{
	struct mmc_host *host = cls_dev_to_mmc_host(dev);
	kfree(host);
}

static struct class mmc_host_class = {
	.name		= "mmc_host",
	.release	= mmc_host_classdev_release,
};

static DEFINE_IDR(mmc_host_idr);
static DEFINE_SPINLOCK(mmc_host_lock);

/*
 * Internal function. Allocate a new MMC host.
 */
struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev)
{
	struct mmc_host *host;

	host = kmalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL);
	if (host) {
		memset(host, 0, sizeof(struct mmc_host) + extra);

		host->dev = dev;
		host->class_dev.dev = host->dev;
		host->class_dev.class = &mmc_host_class;
		class_device_initialize(&host->class_dev);
	}

	return host;
}

/*
 * Internal function. Register a new MMC host with the MMC class.
 */
int mmc_add_host_sysfs(struct mmc_host *host)
{
	int err;

	if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL))
		return -ENOMEM;

	spin_lock(&mmc_host_lock);
	err = idr_get_new(&mmc_host_idr, host, &host->index);
	spin_unlock(&mmc_host_lock);
	if (err)
		return err;

	snprintf(host->class_dev.class_id, BUS_ID_SIZE,
		 "mmc%d", host->index);

	return class_device_add(&host->class_dev);
}

/*
 * Internal function. Unregister a MMC host with the MMC class.
 */
void mmc_remove_host_sysfs(struct mmc_host *host)
{
	class_device_del(&host->class_dev);

	spin_lock(&mmc_host_lock);
	idr_remove(&mmc_host_idr, host->index);
	spin_unlock(&mmc_host_lock);
}

/*
 * Internal function. Free a MMC host.
 */
void mmc_free_host_sysfs(struct mmc_host *host)
{
	class_device_put(&host->class_dev);
}

static struct workqueue_struct *workqueue;

/*
 * Internal function. Schedule delayed work in the MMC work queue.
 */
int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay)
{
	return queue_delayed_work(workqueue, work, delay);
}

/*
 * Internal function. Flush all scheduled work from the MMC work queue.
 */
void mmc_flush_scheduled_work(void)
{
	flush_workqueue(workqueue);
}

static int __init mmc_init(void)
{
	int ret;

	workqueue = create_singlethread_workqueue("kmmcd");
	if (!workqueue)
		return -ENOMEM;

	ret = bus_register(&mmc_bus_type);
	if (ret == 0) {
		ret = class_register(&mmc_host_class);
		if (ret)
			bus_unregister(&mmc_bus_type);
	}
	return ret;
}

static void __exit mmc_exit(void)
{
	class_unregister(&mmc_host_class);
	bus_unregister(&mmc_bus_type);
	destroy_workqueue(workqueue);
}

module_init(mmc_init);
module_exit(mmc_exit);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/drivers/mmc/mmc_sysfs.c
	3	*
	4	* Copyright (C) 2003 Russell King, All Rights Reserved.
	5	*
	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.
	9	*
	10	* MMC sysfs/driver model support.
	11	*/
	12	#include <linux/module.h>
	13	#include <linux/init.h>
	14	#include <linux/device.h>
dce77377	15	#include <linux/idr.h>
7104e2d5	16	#include <linux/workqueue.h>
1da177e4 LT	17
	18	#include <linux/mmc/card.h>
	19	#include <linux/mmc/host.h>
	20
	21	#include "mmc.h"
	22
	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)
00b137cf	25	#define cls_dev_to_mmc_host(d) container_of(d, struct mmc_host, class_dev)
1da177e4 LT	26
1da177e4 LT	27	#define MMC_ATTR(name, fmt, args...) \
e404e274	28	static ssize_t mmc_##name##_show (struct device dev, struct device_attribute attr, char *buf) \
1da177e4 LT	29	{ \
	30	struct mmc_card *card = dev_to_mmc_card(dev); \
	31	return sprintf(buf, fmt, args); \
	32	}
	33
	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]);
a9c4342b	38	MMC_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
1da177e4 LT	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);
	46
	47	#define MMC_ATTR_RO(name) __ATTR(name, S_IRUGO, mmc_##name##_show, NULL)
	48
	49	static struct device_attribute mmc_dev_attrs[] = {
	50	MMC_ATTR_RO(cid),
	51	MMC_ATTR_RO(csd),
	52	MMC_ATTR_RO(date),
	53	MMC_ATTR_RO(fwrev),
	54	MMC_ATTR_RO(hwrev),
	55	MMC_ATTR_RO(manfid),
	56	MMC_ATTR_RO(name),
	57	MMC_ATTR_RO(oemid),
	58	MMC_ATTR_RO(serial),
	59	__ATTR_NULL
	60	};
	61
4bc20a8d PO	62	static struct device_attribute mmc_dev_attr_scr = MMC_ATTR_RO(scr);
4bc20a8d PO	63
1da177e4 LT	64
	65	static void mmc_release_card(struct device *dev)
	66	{
	67	struct mmc_card *card = dev_to_mmc_card(dev);
	68
	69	kfree(card);
	70	}
	71
	72	/*
	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.
	76	*/
	77	static int mmc_bus_match(struct device dev, struct device_driver drv)
	78	{
	79	struct mmc_card *card = dev_to_mmc_card(dev);
	80	return !mmc_card_bad(card);
	81	}
	82
	83	static int
312c004d	84	mmc_bus_uevent(struct device dev, char envp, int num_envp, char buf,
1da177e4 LT	85	int buf_size)
	86	{
	87	struct mmc_card *card = dev_to_mmc_card(dev);
	88	char ccc[13];
	89	int i = 0;
	90
	91	#define add_env(fmt,val) \
	92	({ \
	93	int len, ret = -ENOMEM; \
	94	if (i < num_envp) { \
	95	envp[i++] = buf; \
	96	len = snprintf(buf, buf_size, fmt, val) + 1; \
	97	buf_size -= len; \
	98	buf += len; \
	99	if (buf_size >= 0) \
	100	ret = 0; \
	101	} \
	102	ret; \
	103	})
	104
	105	for (i = 0; i < 12; i++)
	106	ccc[i] = card->csd.cmdclass & (1 << i) ? '1' : '0';
	107	ccc[12] = '\0';
	108
	109	i = 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);
	114
	115	return 0;
	116	}
	117
	118	static int mmc_bus_suspend(struct device *dev, pm_message_t state)
	119	{
	120	struct mmc_driver *drv = to_mmc_driver(dev->driver);
	121	struct mmc_card *card = dev_to_mmc_card(dev);
	122	int ret = 0;
	123
	124	if (dev->driver && drv->suspend)
	125	ret = drv->suspend(card, state);
	126	return ret;
	127	}
	128
	129	static int mmc_bus_resume(struct device *dev)
	130	{
	131	struct mmc_driver *drv = to_mmc_driver(dev->driver);
	132	struct mmc_card *card = dev_to_mmc_card(dev);
	133	int ret = 0;
	134
	135	if (dev->driver && drv->resume)
	136	ret = drv->resume(card);
	137	return ret;
	138	}
	139
4d0b653c	140	static int mmc_bus_probe(struct device *dev)
1da177e4 LT	141	{
	142	struct mmc_driver *drv = to_mmc_driver(dev->driver);
	143	struct mmc_card *card = dev_to_mmc_card(dev);
	144
	145	return drv->probe(card);
	146	}
	147
4d0b653c	148	static int mmc_bus_remove(struct device *dev)
1da177e4 LT	149	{
	150	struct mmc_driver *drv = to_mmc_driver(dev->driver);
	151	struct mmc_card *card = dev_to_mmc_card(dev);
	152
	153	drv->remove(card);
	154
	155	return 0;
	156	}
	157
4d0b653c RK	158	static struct bus_type mmc_bus_type = {
	159	.name = "mmc",
	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,
	167	};
1da177e4 LT	168
	169	/**
	170	* mmc_register_driver - register a media driver
	171	* @drv: MMC media driver
	172	*/
	173	int mmc_register_driver(struct mmc_driver *drv)
	174	{
	175	drv->drv.bus = &mmc_bus_type;
1da177e4 LT	176	return driver_register(&drv->drv);
	177	}
	178
	179	EXPORT_SYMBOL(mmc_register_driver);
	180
	181	/**
	182	* mmc_unregister_driver - unregister a media driver
	183	* @drv: MMC media driver
	184	*/
	185	void mmc_unregister_driver(struct mmc_driver *drv)
	186	{
	187	drv->drv.bus = &mmc_bus_type;
	188	driver_unregister(&drv->drv);
	189	}
	190
	191	EXPORT_SYMBOL(mmc_unregister_driver);
	192
	193
	194	/*
	195	* Internal function. Initialise a MMC card structure.
	196	*/
	197	void mmc_init_card(struct mmc_card card, struct mmc_host host)
	198	{
	199	memset(card, 0, sizeof(struct mmc_card));
	200	card->host = host;
	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;
	205	}
	206
	207	/*
	208	* Internal function. Register a new MMC card with the driver model.
	209	*/
	210	int mmc_register_card(struct mmc_card *card)
	211	{
4bc20a8d PO	212	int ret;
4bc20a8d PO	213
1da177e4	214	snprintf(card->dev.bus_id, sizeof(card->dev.bus_id),
d366b643	215	"%s:%04x", mmc_hostname(card->host), card->rca);
1da177e4	216
4bc20a8d PO	217	ret = device_add(&card->dev);
	218	if (ret == 0) {
	219	if (mmc_card_sd(card)) {
	220	ret = device_create_file(&card->dev, &mmc_dev_attr_scr);
	221	if (ret)
	222	device_del(&card->dev);
	223	}
	224	}
	225	return ret;
1da177e4 LT	226	}
	227
	228	/*
	229	* Internal function. Unregister a new MMC card with the
	230	* driver model, and (eventually) free it.
	231	*/
	232	void mmc_remove_card(struct mmc_card *card)
	233	{
4bc20a8d PO	234	if (mmc_card_present(card)) {
	235	if (mmc_card_sd(card))
	236	device_remove_file(&card->dev, &mmc_dev_attr_scr);
	237
1da177e4	238	device_del(&card->dev);
4bc20a8d	239	}
1da177e4 LT	240
	241	put_device(&card->dev);
	242	}
	243
	244
00b137cf RK	245	static void mmc_host_classdev_release(struct class_device *dev)
	246	{
	247	struct mmc_host *host = cls_dev_to_mmc_host(dev);
	248	kfree(host);
	249	}
	250
	251	static struct class mmc_host_class = {
	252	.name = "mmc_host",
	253	.release = mmc_host_classdev_release,
	254	};
	255
dce77377 RK	256	static DEFINE_IDR(mmc_host_idr);
	257	static DEFINE_SPINLOCK(mmc_host_lock);
	258
00b137cf RK	259	/*
	260	* Internal function. Allocate a new MMC host.
	261	*/
	262	struct mmc_host mmc_alloc_host_sysfs(int extra, struct device dev)
	263	{
	264	struct mmc_host *host;
	265
	266	host = kmalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL);
	267	if (host) {
	268	memset(host, 0, sizeof(struct mmc_host) + extra);
	269
	270	host->dev = dev;
	271	host->class_dev.dev = host->dev;
	272	host->class_dev.class = &mmc_host_class;
	273	class_device_initialize(&host->class_dev);
	274	}
	275
	276	return host;
	277	}
	278
	279	/*
	280	* Internal function. Register a new MMC host with the MMC class.
	281	*/
	282	int mmc_add_host_sysfs(struct mmc_host *host)
	283	{
dce77377 RK	284	int err;
	285
	286	if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL))
	287	return -ENOMEM;
	288
	289	spin_lock(&mmc_host_lock);
	290	err = idr_get_new(&mmc_host_idr, host, &host->index);
	291	spin_unlock(&mmc_host_lock);
	292	if (err)
	293	return err;
00b137cf	294
1ad434d7	295	snprintf(host->class_dev.class_id, BUS_ID_SIZE,
dce77377	296	"mmc%d", host->index);
00b137cf	297
00b137cf RK	298	return class_device_add(&host->class_dev);
	299	}
	300
	301	/*
	302	* Internal function. Unregister a MMC host with the MMC class.
	303	*/
	304	void mmc_remove_host_sysfs(struct mmc_host *host)
	305	{
	306	class_device_del(&host->class_dev);
dce77377 RK	307
	308	spin_lock(&mmc_host_lock);
	309	idr_remove(&mmc_host_idr, host->index);
	310	spin_unlock(&mmc_host_lock);
00b137cf RK	311	}
	312
	313	/*
	314	* Internal function. Free a MMC host.
	315	*/
	316	void mmc_free_host_sysfs(struct mmc_host *host)
	317	{
	318	class_device_put(&host->class_dev);
	319	}
	320
7104e2d5 PO	321	static struct workqueue_struct *workqueue;
7104e2d5 PO	322
7104e2d5 PO	323	/*
	324	* Internal function. Schedule delayed work in the MMC work queue.
	325	*/
c4028958	326	int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay)
7104e2d5 PO	327	{
	328	return queue_delayed_work(workqueue, work, delay);
	329	}
	330
	331	/*
	332	* Internal function. Flush all scheduled work from the MMC work queue.
	333	*/
	334	void mmc_flush_scheduled_work(void)
	335	{
	336	flush_workqueue(workqueue);
	337	}
00b137cf	338
1da177e4 LT	339	static int __init mmc_init(void)
1da177e4 LT	340	{
7104e2d5 PO	341	int ret;
	342
	343	workqueue = create_singlethread_workqueue("kmmcd");
	344	if (!workqueue)
	345	return -ENOMEM;
	346
	347	ret = bus_register(&mmc_bus_type);
00b137cf RK	348	if (ret == 0) {
	349	ret = class_register(&mmc_host_class);
	350	if (ret)
	351	bus_unregister(&mmc_bus_type);
	352	}
	353	return ret;
1da177e4 LT	354	}
	355
	356	static void __exit mmc_exit(void)
	357	{
00b137cf	358	class_unregister(&mmc_host_class);
1da177e4	359	bus_unregister(&mmc_bus_type);
7104e2d5	360	destroy_workqueue(workqueue);
1da177e4 LT	361	}
	362
	363	module_init(mmc_init);
	364	module_exit(mmc_exit);