[deliverable/linux.git] / drivers / mmc / core / bus.c

/*
 *  linux/drivers/mmc/core/bus.c
 *
 *  Copyright (C) 2003 Russell King, All Rights Reserved.
 *  Copyright (C) 2007 Pierre Ossman
 *
 * 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 card bus driver model
 */

#include <linux/device.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>

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

#include "core.h"
#include "sdio_cis.h"
#include "bus.h"

#define to_mmc_driver(d)	container_of(d, struct mmc_driver, drv)

static ssize_t mmc_type_show(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct mmc_card *card = mmc_dev_to_card(dev);

	switch (card->type) {
	case MMC_TYPE_MMC:
		return sprintf(buf, "MMC\n");
	case MMC_TYPE_SD:
		return sprintf(buf, "SD\n");
	case MMC_TYPE_SDIO:
		return sprintf(buf, "SDIO\n");
	case MMC_TYPE_SD_COMBO:
		return sprintf(buf, "SDcombo\n");
	default:
		return -EFAULT;
	}
}

static struct device_attribute mmc_dev_attrs[] = {
	__ATTR(type, S_IRUGO, mmc_type_show, NULL),
	__ATTR_NULL,
};

/*
 * This currently matches any MMC driver to any MMC card - drivers
 * themselves make the decision whether to drive this card in their
 * probe method.
 */
static int mmc_bus_match(struct device *dev, struct device_driver *drv)
{
	return 1;
}

static int
mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
{
	struct mmc_card *card = mmc_dev_to_card(dev);
	const char *type;
	int retval = 0;

	switch (card->type) {
	case MMC_TYPE_MMC:
		type = "MMC";
		break;
	case MMC_TYPE_SD:
		type = "SD";
		break;
	case MMC_TYPE_SDIO:
		type = "SDIO";
		break;
	case MMC_TYPE_SD_COMBO:
		type = "SDcombo";
		break;
	default:
		type = NULL;
	}

	if (type) {
		retval = add_uevent_var(env, "MMC_TYPE=%s", type);
		if (retval)
			return retval;
	}

	retval = add_uevent_var(env, "MMC_NAME=%s", mmc_card_name(card));
	if (retval)
		return retval;

	/*
	 * Request the mmc_block device.  Note: that this is a direct request
	 * for the module it carries no information as to what is inserted.
	 */
	retval = add_uevent_var(env, "MODALIAS=mmc:block");

	return retval;
}

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

	drv->remove(card);

	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 = mmc_dev_to_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 = mmc_dev_to_card(dev);
	int ret = 0;

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

#ifdef CONFIG_PM_RUNTIME

static int mmc_runtime_suspend(struct device *dev)
{
	struct mmc_card *card = mmc_dev_to_card(dev);

	return mmc_power_save_host(card->host);
}

static int mmc_runtime_resume(struct device *dev)
{
	struct mmc_card *card = mmc_dev_to_card(dev);

	return mmc_power_restore_host(card->host);
}

static int mmc_runtime_idle(struct device *dev)
{
	return pm_runtime_suspend(dev);
}

static const struct dev_pm_ops mmc_bus_pm_ops = {
	.runtime_suspend	= mmc_runtime_suspend,
	.runtime_resume		= mmc_runtime_resume,
	.runtime_idle		= mmc_runtime_idle,
};

#define MMC_PM_OPS_PTR	(&mmc_bus_pm_ops)

#else /* !CONFIG_PM_RUNTIME */

#define MMC_PM_OPS_PTR	NULL

#endif /* !CONFIG_PM_RUNTIME */

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,
	.pm		= MMC_PM_OPS_PTR,
};

int mmc_register_bus(void)
{
	return bus_register(&mmc_bus_type);
}

void mmc_unregister_bus(void)
{
	bus_unregister(&mmc_bus_type);
}

/**
 *	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);

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

	sdio_free_common_cis(card);

	if (card->info)
		kfree(card->info);

	kfree(card);
}

/*
 * Allocate and initialise a new MMC card structure.
 */
struct mmc_card *mmc_alloc_card(struct mmc_host *host, struct device_type *type)
{
	struct mmc_card *card;

	card = kzalloc(sizeof(struct mmc_card), GFP_KERNEL);
	if (!card)
		return ERR_PTR(-ENOMEM);

	card->host = host;

	device_initialize(&card->dev);

	card->dev.parent = mmc_classdev(host);
	card->dev.bus = &mmc_bus_type;
	card->dev.release = mmc_release_card;
	card->dev.type = type;

	return card;
}

/*
 * Register a new MMC card with the driver model.
 */
int mmc_add_card(struct mmc_card *card)
{
	int ret;
	const char *type;

	dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca);

	switch (card->type) {
	case MMC_TYPE_MMC:
		type = "MMC";
		break;
	case MMC_TYPE_SD:
		type = "SD";
		if (mmc_card_blockaddr(card)) {
			if (mmc_card_ext_capacity(card))
				type = "SDXC";
			else
				type = "SDHC";
		}
		break;
	case MMC_TYPE_SDIO:
		type = "SDIO";
		break;
	case MMC_TYPE_SD_COMBO:
		type = "SD-combo";
		if (mmc_card_blockaddr(card))
			type = "SDHC-combo";
		break;
	default:
		type = "?";
		break;
	}

	if (mmc_host_is_spi(card->host)) {
		pr_info("%s: new %s%s%s card on SPI\n",
			mmc_hostname(card->host),
			mmc_card_highspeed(card) ? "high speed " : "",
			mmc_card_ddr_mode(card) ? "DDR " : "",
			type);
	} else {
		printk(KERN_INFO "%s: new %s%s%s card at address %04x\n",
			mmc_hostname(card->host),
			mmc_sd_card_uhs(card) ? "ultra high speed " :
			(mmc_card_highspeed(card) ? "high speed " : ""),
			mmc_card_ddr_mode(card) ? "DDR " : "",
			type, card->rca);
	}

#ifdef CONFIG_DEBUG_FS
	mmc_add_card_debugfs(card);
#endif

	ret = device_add(&card->dev);
	if (ret)
		return ret;

	mmc_card_set_present(card);

	return 0;
}

/*
 * Unregister a new MMC card with the driver model, and
 * (eventually) free it.
 */
void mmc_remove_card(struct mmc_card *card)
{
#ifdef CONFIG_DEBUG_FS
	mmc_remove_card_debugfs(card);
#endif

	if (mmc_card_present(card)) {
		if (mmc_host_is_spi(card->host)) {
			pr_info("%s: SPI card removed\n",
				mmc_hostname(card->host));
		} else {
			pr_info("%s: card %04x removed\n",
				mmc_hostname(card->host), card->rca);
		}
		device_del(&card->dev);
	}

	put_device(&card->dev);
}
Commit	Line	Data
4101c16a PO	1	/*
	2	* linux/drivers/mmc/core/bus.c
	3	*
	4	* Copyright (C) 2003 Russell King, All Rights Reserved.
	5	* Copyright (C) 2007 Pierre Ossman
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*
	11	* MMC card bus driver model
	12	*/
	13
	14	#include <linux/device.h>
	15	#include <linux/err.h>
5a0e3ad6	16	#include <linux/slab.h>
516d5ccd	17	#include <linux/pm_runtime.h>
4101c16a PO	18
	19	#include <linux/mmc/card.h>
	20	#include <linux/mmc/host.h>
	21
4101c16a	22	#include "core.h"
1a632f8c	23	#include "sdio_cis.h"
4101c16a PO	24	#include "bus.h"
4101c16a PO	25
4101c16a PO	26	#define to_mmc_driver(d) container_of(d, struct mmc_driver, drv)
	27
	28	static ssize_t mmc_type_show(struct device *dev,
	29	struct device_attribute attr, char buf)
	30	{
265cdc90	31	struct mmc_card *card = mmc_dev_to_card(dev);
4101c16a PO	32
	33	switch (card->type) {
	34	case MMC_TYPE_MMC:
	35	return sprintf(buf, "MMC\n");
	36	case MMC_TYPE_SD:
	37	return sprintf(buf, "SD\n");
5c4e6f13 PO	38	case MMC_TYPE_SDIO:
5c4e6f13 PO	39	return sprintf(buf, "SDIO\n");
7310ece8 MM	40	case MMC_TYPE_SD_COMBO:
7310ece8 MM	41	return sprintf(buf, "SDcombo\n");
4101c16a PO	42	default:
	43	return -EFAULT;
	44	}
	45	}
	46
	47	static struct device_attribute mmc_dev_attrs[] = {
51ec92e2	48	__ATTR(type, S_IRUGO, mmc_type_show, NULL),
4101c16a PO	49	__ATTR_NULL,
	50	};
	51
	52	/*
	53	* This currently matches any MMC driver to any MMC card - drivers
	54	* themselves make the decision whether to drive this card in their
	55	* probe method.
	56	*/
	57	static int mmc_bus_match(struct device dev, struct device_driver drv)
	58	{
	59	return 1;
	60	}
	61
	62	static int
7eff2e7a	63	mmc_bus_uevent(struct device dev, struct kobj_uevent_env env)
4101c16a	64	{
265cdc90	65	struct mmc_card *card = mmc_dev_to_card(dev);
9eb3a94d	66	const char *type;
7eff2e7a	67	int retval = 0;
4101c16a PO	68
	69	switch (card->type) {
	70	case MMC_TYPE_MMC:
9eb3a94d	71	type = "MMC";
4101c16a PO	72	break;
4101c16a PO	73	case MMC_TYPE_SD:
9eb3a94d	74	type = "SD";
4101c16a	75	break;
5c4e6f13	76	case MMC_TYPE_SDIO:
9eb3a94d	77	type = "SDIO";
5c4e6f13	78	break;
7310ece8 MM	79	case MMC_TYPE_SD_COMBO:
	80	type = "SDcombo";
	81	break;
9eb3a94d PO	82	default:
9eb3a94d PO	83	type = NULL;
4101c16a PO	84	}
4101c16a PO	85
9eb3a94d	86	if (type) {
7eff2e7a KS	87	retval = add_uevent_var(env, "MMC_TYPE=%s", type);
	88	if (retval)
	89	return retval;
9eb3a94d	90	}
4101c16a	91
7eff2e7a	92	retval = add_uevent_var(env, "MMC_NAME=%s", mmc_card_name(card));
6b0b6285 AW	93	if (retval)
	94	return retval;
	95
	96	/*
	97	* Request the mmc_block device. Note: that this is a direct request
	98	* for the module it carries no information as to what is inserted.
	99	*/
	100	retval = add_uevent_var(env, "MODALIAS=mmc:block");
4101c16a	101
7eff2e7a	102	return retval;
4101c16a PO	103	}
	104
	105	static int mmc_bus_probe(struct device *dev)
	106	{
	107	struct mmc_driver *drv = to_mmc_driver(dev->driver);
265cdc90	108	struct mmc_card *card = mmc_dev_to_card(dev);
4101c16a PO	109
	110	return drv->probe(card);
	111	}
	112
	113	static int mmc_bus_remove(struct device *dev)
	114	{
	115	struct mmc_driver *drv = to_mmc_driver(dev->driver);
265cdc90	116	struct mmc_card *card = mmc_dev_to_card(dev);
4101c16a PO	117
	118	drv->remove(card);
	119
	120	return 0;
	121	}
	122
	123	static int mmc_bus_suspend(struct device *dev, pm_message_t state)
	124	{
	125	struct mmc_driver *drv = to_mmc_driver(dev->driver);
265cdc90	126	struct mmc_card *card = mmc_dev_to_card(dev);
4101c16a PO	127	int ret = 0;
	128
	129	if (dev->driver && drv->suspend)
	130	ret = drv->suspend(card, state);
	131	return ret;
	132	}
	133
	134	static int mmc_bus_resume(struct device *dev)
	135	{
	136	struct mmc_driver *drv = to_mmc_driver(dev->driver);
265cdc90	137	struct mmc_card *card = mmc_dev_to_card(dev);
4101c16a PO	138	int ret = 0;
	139
	140	if (dev->driver && drv->resume)
	141	ret = drv->resume(card);
	142	return ret;
	143	}
	144
516d5ccd OBC	145	#ifdef CONFIG_PM_RUNTIME
	146
	147	static int mmc_runtime_suspend(struct device *dev)
	148	{
	149	struct mmc_card *card = mmc_dev_to_card(dev);
	150
	151	return mmc_power_save_host(card->host);
	152	}
	153
	154	static int mmc_runtime_resume(struct device *dev)
	155	{
	156	struct mmc_card *card = mmc_dev_to_card(dev);
	157
	158	return mmc_power_restore_host(card->host);
	159	}
	160
	161	static int mmc_runtime_idle(struct device *dev)
	162	{
	163	return pm_runtime_suspend(dev);
	164	}
	165
	166	static const struct dev_pm_ops mmc_bus_pm_ops = {
	167	.runtime_suspend = mmc_runtime_suspend,
	168	.runtime_resume = mmc_runtime_resume,
	169	.runtime_idle = mmc_runtime_idle,
	170	};
	171
	172	#define MMC_PM_OPS_PTR (&mmc_bus_pm_ops)
	173
	174	#else /* !CONFIG_PM_RUNTIME */
	175
	176	#define MMC_PM_OPS_PTR NULL
	177
	178	#endif /* !CONFIG_PM_RUNTIME */
	179
4101c16a PO	180	static struct bus_type mmc_bus_type = {
	181	.name = "mmc",
	182	.dev_attrs = mmc_dev_attrs,
	183	.match = mmc_bus_match,
	184	.uevent = mmc_bus_uevent,
	185	.probe = mmc_bus_probe,
	186	.remove = mmc_bus_remove,
	187	.suspend = mmc_bus_suspend,
	188	.resume = mmc_bus_resume,
516d5ccd	189	.pm = MMC_PM_OPS_PTR,
4101c16a PO	190	};
	191
	192	int mmc_register_bus(void)
	193	{
	194	return bus_register(&mmc_bus_type);
	195	}
	196
	197	void mmc_unregister_bus(void)
	198	{
	199	bus_unregister(&mmc_bus_type);
	200	}
	201
	202	/**
	203	* mmc_register_driver - register a media driver
	204	* @drv: MMC media driver
	205	*/
	206	int mmc_register_driver(struct mmc_driver *drv)
	207	{
	208	drv->drv.bus = &mmc_bus_type;
	209	return driver_register(&drv->drv);
	210	}
	211
	212	EXPORT_SYMBOL(mmc_register_driver);
	213
	214	/**
	215	* mmc_unregister_driver - unregister a media driver
	216	* @drv: MMC media driver
	217	*/
	218	void mmc_unregister_driver(struct mmc_driver *drv)
	219	{
	220	drv->drv.bus = &mmc_bus_type;
	221	driver_unregister(&drv->drv);
	222	}
	223
	224	EXPORT_SYMBOL(mmc_unregister_driver);
	225
	226	static void mmc_release_card(struct device *dev)
	227	{
265cdc90	228	struct mmc_card *card = mmc_dev_to_card(dev);
4101c16a	229
1a632f8c PO	230	sdio_free_common_cis(card);
1a632f8c PO	231
759bdc7a PO	232	if (card->info)
	233	kfree(card->info);
	234
4101c16a PO	235	kfree(card);
	236	}
	237
	238	/*
	239	* Allocate and initialise a new MMC card structure.
	240	*/
51ec92e2	241	struct mmc_card mmc_alloc_card(struct mmc_host host, struct device_type *type)
4101c16a PO	242	{
	243	struct mmc_card *card;
	244
733cb1e4	245	card = kzalloc(sizeof(struct mmc_card), GFP_KERNEL);
4101c16a PO	246	if (!card)
	247	return ERR_PTR(-ENOMEM);
	248
4101c16a PO	249	card->host = host;
	250
	251	device_initialize(&card->dev);
	252
	253	card->dev.parent = mmc_classdev(host);
	254	card->dev.bus = &mmc_bus_type;
	255	card->dev.release = mmc_release_card;
51ec92e2	256	card->dev.type = type;
4101c16a PO	257
	258	return card;
	259	}
	260
	261	/*
	262	* Register a new MMC card with the driver model.
	263	*/
	264	int mmc_add_card(struct mmc_card *card)
	265	{
	266	int ret;
109b5bed	267	const char *type;
4101c16a	268
d1b26863	269	dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca);
4101c16a	270
109b5bed PO	271	switch (card->type) {
	272	case MMC_TYPE_MMC:
	273	type = "MMC";
	274	break;
	275	case MMC_TYPE_SD:
	276	type = "SD";
3a303511 AN	277	if (mmc_card_blockaddr(card)) {
	278	if (mmc_card_ext_capacity(card))
	279	type = "SDXC";
	280	else
	281	type = "SDHC";
	282	}
109b5bed	283	break;
5c4e6f13 PO	284	case MMC_TYPE_SDIO:
	285	type = "SDIO";
	286	break;
7310ece8 MM	287	case MMC_TYPE_SD_COMBO:
	288	type = "SD-combo";
	289	if (mmc_card_blockaddr(card))
	290	type = "SDHC-combo";
9bc21848	291	break;
109b5bed PO	292	default:
	293	type = "?";
	294	break;
	295	}
	296
af517150	297	if (mmc_host_is_spi(card->host)) {
a3c76eb9	298	pr_info("%s: new %s%s%s card on SPI\n",
af517150 DB	299	mmc_hostname(card->host),
af517150 DB	300	mmc_card_highspeed(card) ? "high speed " : "",
0f8d8ea6	301	mmc_card_ddr_mode(card) ? "DDR " : "",
af517150 DB	302	type);
af517150 DB	303	} else {
0f8d8ea6	304	printk(KERN_INFO "%s: new %s%s%s card at address %04x\n",
af517150	305	mmc_hostname(card->host),
3a303511 AN	306	mmc_sd_card_uhs(card) ? "ultra high speed " :
3a303511 AN	307	(mmc_card_highspeed(card) ? "high speed " : ""),
0f8d8ea6	308	mmc_card_ddr_mode(card) ? "DDR " : "",
af517150 DB	309	type, card->rca);
af517150 DB	310	}
109b5bed	311
f4b7f927 HS	312	#ifdef CONFIG_DEBUG_FS
	313	mmc_add_card_debugfs(card);
	314	#endif
	315
1a2727e9 VK	316	ret = device_add(&card->dev);
	317	if (ret)
	318	return ret;
	319
4101c16a PO	320	mmc_card_set_present(card);
	321
	322	return 0;
	323	}
	324
	325	/*
	326	* Unregister a new MMC card with the driver model, and
	327	* (eventually) free it.
	328	*/
	329	void mmc_remove_card(struct mmc_card *card)
	330	{
f4b7f927 HS	331	#ifdef CONFIG_DEBUG_FS
	332	mmc_remove_card_debugfs(card);
	333	#endif
	334
4101c16a	335	if (mmc_card_present(card)) {
af517150	336	if (mmc_host_is_spi(card->host)) {
a3c76eb9	337	pr_info("%s: SPI card removed\n",
af517150 DB	338	mmc_hostname(card->host));
af517150 DB	339	} else {
a3c76eb9	340	pr_info("%s: card %04x removed\n",
af517150 DB	341	mmc_hostname(card->host), card->rca);
af517150 DB	342	}
4101c16a PO	343	device_del(&card->dev);
	344	}
	345
	346	put_device(&card->dev);
	347	}
	348