[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/export.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/stat.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"

static ssize_t 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 DEVICE_ATTR_RO(type);

static struct attribute *mmc_dev_attrs[] = {
	&dev_attr_type.attr,
	NULL,
};
ATTRIBUTE_GROUPS(mmc_dev);

/*
 * 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 void mmc_bus_shutdown(struct device *dev)
{
	struct mmc_card *card = mmc_dev_to_card(dev);
	struct mmc_host *host = card->host;
	int ret;

	if (dev->driver && dev->driver->shutdown)
		dev->driver->shutdown(dev);

	if (host->bus_ops->shutdown) {
		ret = host->bus_ops->shutdown(host);
		if (ret)
			pr_warn("%s: error %d during shutdown\n",
				mmc_hostname(host), ret);
	}
}

#ifdef CONFIG_PM_SLEEP
static int mmc_bus_suspend(struct device *dev)
{
	struct mmc_card *card = mmc_dev_to_card(dev);
	struct mmc_host *host = card->host;
	int ret;

	ret = pm_generic_suspend(dev);
	if (ret)
		return ret;

	ret = host->bus_ops->suspend(host);
	return ret;
}

static int mmc_bus_resume(struct device *dev)
{
	struct mmc_card *card = mmc_dev_to_card(dev);
	struct mmc_host *host = card->host;
	int ret;

	ret = host->bus_ops->resume(host);
	if (ret)
		pr_warn("%s: error %d during resume (card was removed?)\n",
			mmc_hostname(host), ret);

	ret = pm_generic_resume(dev);
	return ret;
}
#endif

#ifdef CONFIG_PM_RUNTIME
static int mmc_runtime_suspend(struct device *dev)
{
	struct mmc_card *card = mmc_dev_to_card(dev);
	struct mmc_host *host = card->host;

	return host->bus_ops->runtime_suspend(host);
}

static int mmc_runtime_resume(struct device *dev)
{
	struct mmc_card *card = mmc_dev_to_card(dev);
	struct mmc_host *host = card->host;

	return host->bus_ops->runtime_resume(host);
}
#endif /* !CONFIG_PM_RUNTIME */

static const struct dev_pm_ops mmc_bus_pm_ops = {
	SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume, NULL)
	SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_suspend, mmc_bus_resume)
};

static struct bus_type mmc_bus_type = {
	.name		= "mmc",
	.dev_groups	= mmc_dev_groups,
	.match		= mmc_bus_match,
	.uevent		= mmc_bus_uevent,
	.shutdown	= mmc_bus_shutdown,
	.pm		= &mmc_bus_pm_ops,
};

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 device_driver *drv)
{
	drv->bus = &mmc_bus_type;
	return driver_register(drv);
}
EXPORT_SYMBOL(mmc_register_driver);

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

	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;
	const char *uhs_bus_speed_mode = "";
	static const char *const uhs_speeds[] = {
		[UHS_SDR12_BUS_SPEED] = "SDR12 ",
		[UHS_SDR25_BUS_SPEED] = "SDR25 ",
		[UHS_SDR50_BUS_SPEED] = "SDR50 ",
		[UHS_SDR104_BUS_SPEED] = "SDR104 ",
		[UHS_DDR50_BUS_SPEED] = "DDR50 ",
	};


	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_card_uhs(card) &&
		(card->sd_bus_speed < ARRAY_SIZE(uhs_speeds)))
		uhs_bus_speed_mode = uhs_speeds[card->sd_bus_speed];

	if (mmc_host_is_spi(card->host)) {
		pr_info("%s: new %s%s%s card on SPI\n",
			mmc_hostname(card->host),
			mmc_card_hs(card) ? "high speed " : "",
			mmc_card_ddr52(card) ? "DDR " : "",
			type);
	} else {
		pr_info("%s: new %s%s%s%s%s card at address %04x\n",
			mmc_hostname(card->host),
			mmc_card_uhs(card) ? "ultra high speed " :
			(mmc_card_hs(card) ? "high speed " : ""),
			mmc_card_hs400(card) ? "HS400 " :
			(mmc_card_hs200(card) ? "HS200 " : ""),
			mmc_card_ddr52(card) ? "DDR " : "",
			uhs_bus_speed_mode, type, card->rca);
	}

#ifdef CONFIG_DEBUG_FS
	mmc_add_card_debugfs(card);
#endif
	mmc_init_context_info(card->host);

	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
3ef77af1	14	#include <linux/export.h>
4101c16a PO	15	#include <linux/device.h>
4101c16a PO	16	#include <linux/err.h>
5a0e3ad6	17	#include <linux/slab.h>
0205a904	18	#include <linux/stat.h>
516d5ccd	19	#include <linux/pm_runtime.h>
4101c16a PO	20
	21	#include <linux/mmc/card.h>
	22	#include <linux/mmc/host.h>
	23
4101c16a	24	#include "core.h"
1a632f8c	25	#include "sdio_cis.h"
4101c16a PO	26	#include "bus.h"
4101c16a PO	27
f24fc57b	28	static ssize_t type_show(struct device *dev,
4101c16a PO	29	struct device_attribute attr, char buf)
4101c16a PO	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	}
f24fc57b	46	static DEVICE_ATTR_RO(type);
4101c16a	47
f24fc57b GKH	48	static struct attribute *mmc_dev_attrs[] = {
	49	&dev_attr_type.attr,
	50	NULL,
4101c16a	51	};
f24fc57b	52	ATTRIBUTE_GROUPS(mmc_dev);
4101c16a PO	53
	54	/*
	55	* This currently matches any MMC driver to any MMC card - drivers
	56	* themselves make the decision whether to drive this card in their
	57	* probe method.
	58	*/
	59	static int mmc_bus_match(struct device dev, struct device_driver drv)
	60	{
	61	return 1;
	62	}
	63
	64	static int
7eff2e7a	65	mmc_bus_uevent(struct device dev, struct kobj_uevent_env env)
4101c16a	66	{
265cdc90	67	struct mmc_card *card = mmc_dev_to_card(dev);
9eb3a94d	68	const char *type;
7eff2e7a	69	int retval = 0;
4101c16a PO	70
	71	switch (card->type) {
	72	case MMC_TYPE_MMC:
9eb3a94d	73	type = "MMC";
4101c16a PO	74	break;
4101c16a PO	75	case MMC_TYPE_SD:
9eb3a94d	76	type = "SD";
4101c16a	77	break;
5c4e6f13	78	case MMC_TYPE_SDIO:
9eb3a94d	79	type = "SDIO";
5c4e6f13	80	break;
7310ece8 MM	81	case MMC_TYPE_SD_COMBO:
	82	type = "SDcombo";
	83	break;
9eb3a94d PO	84	default:
9eb3a94d PO	85	type = NULL;
4101c16a PO	86	}
4101c16a PO	87
9eb3a94d	88	if (type) {
7eff2e7a KS	89	retval = add_uevent_var(env, "MMC_TYPE=%s", type);
	90	if (retval)
	91	return retval;
9eb3a94d	92	}
4101c16a	93
7eff2e7a	94	retval = add_uevent_var(env, "MMC_NAME=%s", mmc_card_name(card));
6b0b6285 AW	95	if (retval)
	96	return retval;
	97
	98	/*
	99	* Request the mmc_block device. Note: that this is a direct request
	100	* for the module it carries no information as to what is inserted.
	101	*/
	102	retval = add_uevent_var(env, "MODALIAS=mmc:block");
4101c16a	103
7eff2e7a	104	return retval;
4101c16a PO	105	}
4101c16a PO	106
76287748 UH	107	static void mmc_bus_shutdown(struct device *dev)
76287748 UH	108	{
76287748	109	struct mmc_card *card = mmc_dev_to_card(dev);
6b086bde UH	110	struct mmc_host *host = card->host;
6b086bde UH	111	int ret;
76287748	112
6685ac62 UH	113	if (dev->driver && dev->driver->shutdown)
6685ac62 UH	114	dev->driver->shutdown(dev);
6b086bde UH	115
	116	if (host->bus_ops->shutdown) {
	117	ret = host->bus_ops->shutdown(host);
	118	if (ret)
	119	pr_warn("%s: error %d during shutdown\n",
	120	mmc_hostname(host), ret);
	121	}
76287748 UH	122	}
76287748 UH	123
0dd1bfeb	124	#ifdef CONFIG_PM_SLEEP
32d317c6	125	static int mmc_bus_suspend(struct device *dev)
4101c16a	126	{
265cdc90	127	struct mmc_card *card = mmc_dev_to_card(dev);
986892ca UH	128	struct mmc_host *host = card->host;
986892ca UH	129	int ret;
4101c16a	130
0967edc6 UH	131	ret = pm_generic_suspend(dev);
	132	if (ret)
	133	return ret;
986892ca UH	134
986892ca UH	135	ret = host->bus_ops->suspend(host);
4101c16a PO	136	return ret;
	137	}
	138
	139	static int mmc_bus_resume(struct device *dev)
	140	{
265cdc90	141	struct mmc_card *card = mmc_dev_to_card(dev);
986892ca UH	142	struct mmc_host *host = card->host;
	143	int ret;
	144
	145	ret = host->bus_ops->resume(host);
	146	if (ret)
	147	pr_warn("%s: error %d during resume (card was removed?)\n",
	148	mmc_hostname(host), ret);
4101c16a	149
0967edc6	150	ret = pm_generic_resume(dev);
4101c16a PO	151	return ret;
4101c16a PO	152	}
0dd1bfeb	153	#endif
4101c16a	154
516d5ccd	155	#ifdef CONFIG_PM_RUNTIME
516d5ccd OBC	156	static int mmc_runtime_suspend(struct device *dev)
	157	{
	158	struct mmc_card *card = mmc_dev_to_card(dev);
12d01d0b	159	struct mmc_host *host = card->host;
516d5ccd	160
5601aaf7	161	return host->bus_ops->runtime_suspend(host);
516d5ccd OBC	162	}
	163
	164	static int mmc_runtime_resume(struct device *dev)
	165	{
	166	struct mmc_card *card = mmc_dev_to_card(dev);
12d01d0b	167	struct mmc_host *host = card->host;
516d5ccd	168
5601aaf7	169	return host->bus_ops->runtime_resume(host);
516d5ccd	170	}
32d317c6 CD	171	#endif /* !CONFIG_PM_RUNTIME */
32d317c6 CD	172
516d5ccd	173	static const struct dev_pm_ops mmc_bus_pm_ops = {
2e42da59	174	SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume, NULL)
32d317c6	175	SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_suspend, mmc_bus_resume)
516d5ccd OBC	176	};
516d5ccd OBC	177
4101c16a PO	178	static struct bus_type mmc_bus_type = {
4101c16a PO	179	.name = "mmc",
f24fc57b	180	.dev_groups = mmc_dev_groups,
4101c16a PO	181	.match = mmc_bus_match,
4101c16a PO	182	.uevent = mmc_bus_uevent,
76287748	183	.shutdown = mmc_bus_shutdown,
32d317c6	184	.pm = &mmc_bus_pm_ops,
4101c16a PO	185	};
	186
	187	int mmc_register_bus(void)
	188	{
	189	return bus_register(&mmc_bus_type);
	190	}
	191
	192	void mmc_unregister_bus(void)
	193	{
	194	bus_unregister(&mmc_bus_type);
	195	}
	196
	197	/**
	198	* mmc_register_driver - register a media driver
	199	* @drv: MMC media driver
	200	*/
6685ac62	201	int mmc_register_driver(struct device_driver *drv)
4101c16a	202	{
6685ac62 UH	203	drv->bus = &mmc_bus_type;
6685ac62 UH	204	return driver_register(drv);
4101c16a	205	}
4101c16a PO	206	EXPORT_SYMBOL(mmc_register_driver);
	207
	208	/**
	209	* mmc_unregister_driver - unregister a media driver
	210	* @drv: MMC media driver
	211	*/
6685ac62	212	void mmc_unregister_driver(struct device_driver *drv)
4101c16a	213	{
6685ac62 UH	214	drv->bus = &mmc_bus_type;
6685ac62 UH	215	driver_unregister(drv);
4101c16a	216	}
4101c16a PO	217	EXPORT_SYMBOL(mmc_unregister_driver);
	218
	219	static void mmc_release_card(struct device *dev)
	220	{
265cdc90	221	struct mmc_card *card = mmc_dev_to_card(dev);
4101c16a	222
1a632f8c PO	223	sdio_free_common_cis(card);
1a632f8c PO	224
8db580cc	225	kfree(card->info);
759bdc7a	226
4101c16a PO	227	kfree(card);
	228	}
	229
	230	/*
	231	* Allocate and initialise a new MMC card structure.
	232	*/
51ec92e2	233	struct mmc_card mmc_alloc_card(struct mmc_host host, struct device_type *type)
4101c16a PO	234	{
	235	struct mmc_card *card;
	236
733cb1e4	237	card = kzalloc(sizeof(struct mmc_card), GFP_KERNEL);
4101c16a PO	238	if (!card)
	239	return ERR_PTR(-ENOMEM);
	240
4101c16a PO	241	card->host = host;
	242
	243	device_initialize(&card->dev);
	244
	245	card->dev.parent = mmc_classdev(host);
	246	card->dev.bus = &mmc_bus_type;
	247	card->dev.release = mmc_release_card;
51ec92e2	248	card->dev.type = type;
4101c16a PO	249
	250	return card;
	251	}
	252
	253	/*
	254	* Register a new MMC card with the driver model.
	255	*/
	256	int mmc_add_card(struct mmc_card *card)
	257	{
	258	int ret;
109b5bed	259	const char *type;
6500c8ed SJ	260	const char *uhs_bus_speed_mode = "";
	261	static const char *const uhs_speeds[] = {
	262	[UHS_SDR12_BUS_SPEED] = "SDR12 ",
	263	[UHS_SDR25_BUS_SPEED] = "SDR25 ",
	264	[UHS_SDR50_BUS_SPEED] = "SDR50 ",
	265	[UHS_SDR104_BUS_SPEED] = "SDR104 ",
	266	[UHS_DDR50_BUS_SPEED] = "DDR50 ",
	267	};
	268
4101c16a	269
d1b26863	270	dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca);
4101c16a	271
109b5bed PO	272	switch (card->type) {
	273	case MMC_TYPE_MMC:
	274	type = "MMC";
	275	break;
	276	case MMC_TYPE_SD:
	277	type = "SD";
3a303511 AN	278	if (mmc_card_blockaddr(card)) {
	279	if (mmc_card_ext_capacity(card))
	280	type = "SDXC";
	281	else
	282	type = "SDHC";
	283	}
109b5bed	284	break;
5c4e6f13 PO	285	case MMC_TYPE_SDIO:
	286	type = "SDIO";
	287	break;
7310ece8 MM	288	case MMC_TYPE_SD_COMBO:
	289	type = "SD-combo";
	290	if (mmc_card_blockaddr(card))
	291	type = "SDHC-combo";
9bc21848	292	break;
109b5bed PO	293	default:
	294	type = "?";
	295	break;
	296	}
	297
71ef1ea4	298	if (mmc_card_uhs(card) &&
6500c8ed SJ	299	(card->sd_bus_speed < ARRAY_SIZE(uhs_speeds)))
	300	uhs_bus_speed_mode = uhs_speeds[card->sd_bus_speed];
	301
af517150	302	if (mmc_host_is_spi(card->host)) {
a3c76eb9	303	pr_info("%s: new %s%s%s card on SPI\n",
af517150	304	mmc_hostname(card->host),
cdc99179 SJ	305	mmc_card_hs(card) ? "high speed " : "",
cdc99179 SJ	306	mmc_card_ddr52(card) ? "DDR " : "",
af517150 DB	307	type);
af517150 DB	308	} else {
6500c8ed	309	pr_info("%s: new %s%s%s%s%s card at address %04x\n",
af517150	310	mmc_hostname(card->host),
a303c531	311	mmc_card_uhs(card) ? "ultra high speed " :
cdc99179	312	(mmc_card_hs(card) ? "high speed " : ""),
0a5b6438	313	mmc_card_hs400(card) ? "HS400 " :
a4924c71	314	(mmc_card_hs200(card) ? "HS200 " : ""),
cdc99179	315	mmc_card_ddr52(card) ? "DDR " : "",
6500c8ed	316	uhs_bus_speed_mode, type, card->rca);
af517150	317	}
109b5bed	318
f4b7f927 HS	319	#ifdef CONFIG_DEBUG_FS
	320	mmc_add_card_debugfs(card);
	321	#endif
2220eedf	322	mmc_init_context_info(card->host);
f4b7f927	323
1a2727e9 VK	324	ret = device_add(&card->dev);
	325	if (ret)
	326	return ret;
	327
4101c16a PO	328	mmc_card_set_present(card);
	329
	330	return 0;
	331	}
	332
	333	/*
	334	* Unregister a new MMC card with the driver model, and
	335	* (eventually) free it.
	336	*/
	337	void mmc_remove_card(struct mmc_card *card)
	338	{
f4b7f927 HS	339	#ifdef CONFIG_DEBUG_FS
	340	mmc_remove_card_debugfs(card);
	341	#endif
	342
4101c16a	343	if (mmc_card_present(card)) {
af517150	344	if (mmc_host_is_spi(card->host)) {
a3c76eb9	345	pr_info("%s: SPI card removed\n",
af517150 DB	346	mmc_hostname(card->host));
af517150 DB	347	} else {
a3c76eb9	348	pr_info("%s: card %04x removed\n",
af517150 DB	349	mmc_hostname(card->host), card->rca);
af517150 DB	350	}
4101c16a PO	351	device_del(&card->dev);
	352	}
	353
	354	put_device(&card->dev);
	355	}
	356