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

/*
 *  linux/drivers/mmc/sdio.c
 *
 *  Copyright 2006-2007 Pierre Ossman
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 */

#include <linux/err.h>

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

#include "core.h"
#include "bus.h"
#include "sdio_bus.h"
#include "mmc_ops.h"
#include "sd_ops.h"
#include "sdio_ops.h"
#include "sdio_cis.h"

static int sdio_read_fbr(struct sdio_func *func)
{
	int ret;
	unsigned char data;

	ret = mmc_io_rw_direct(func->card, 0, 0,
		SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF, 0, &data);
	if (ret)
		goto out;

	data &= 0x0f;

	if (data == 0x0f) {
		ret = mmc_io_rw_direct(func->card, 0, 0,
			SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF_EXT, 0, &data);
		if (ret)
			goto out;
	}

	func->class = data;

out:
	return ret;
}

static int sdio_init_func(struct mmc_card *card, unsigned int fn)
{
	int ret;
	struct sdio_func *func;

	BUG_ON(fn > SDIO_MAX_FUNCS);

	func = sdio_alloc_func(card);
	if (IS_ERR(func))
		return PTR_ERR(func);

	func->num = fn;

	ret = sdio_read_fbr(func);
	if (ret)
		goto fail;

	ret = sdio_read_func_cis(func);
	if (ret)
		goto fail;

	card->sdio_func[fn - 1] = func;

	return 0;

fail:
	/*
	 * It is okay to remove the function here even though we hold
	 * the host lock as we haven't registered the device yet.
	 */
	sdio_remove_func(func);
	return ret;
}

static int sdio_read_cccr(struct mmc_card *card)
{
	int ret;
	int cccr_vsn;
	unsigned char data;

	memset(&card->cccr, 0, sizeof(struct sdio_cccr));

	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CCCR, 0, &data);
	if (ret)
		goto out;

	cccr_vsn = data & 0x0f;

	if (cccr_vsn > SDIO_CCCR_REV_1_20) {
		printk(KERN_ERR "%s: unrecognised CCCR structure version %d\n",
			mmc_hostname(card->host), cccr_vsn);
		return -EINVAL;
	}

	card->cccr.sdio_vsn = (data & 0xf0) >> 4;

	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CAPS, 0, &data);
	if (ret)
		goto out;

	if (data & SDIO_CCCR_CAP_SMB)
		card->cccr.multi_block = 1;
	if (data & SDIO_CCCR_CAP_LSC)
		card->cccr.low_speed = 1;
	if (data & SDIO_CCCR_CAP_4BLS)
		card->cccr.wide_bus = 1;

	if (cccr_vsn >= SDIO_CCCR_REV_1_10) {
		ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_POWER, 0, &data);
		if (ret)
			goto out;

		if (data & SDIO_POWER_SMPC)
			card->cccr.high_power = 1;
	}

	if (cccr_vsn >= SDIO_CCCR_REV_1_20) {
		ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &data);
		if (ret)
			goto out;

		if (data & SDIO_SPEED_SHS)
			card->cccr.high_speed = 1;
	}

out:
	return ret;
}

static int sdio_enable_wide(struct mmc_card *card)
{
	int ret;
	u8 ctrl;

	if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
		return 0;

	if (card->cccr.low_speed && !card->cccr.wide_bus)
		return 0;

	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
	if (ret)
		return ret;

	ctrl |= SDIO_BUS_WIDTH_4BIT;

	ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
	if (ret)
		return ret;

	mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);

	return 0;
}

/*
 * If desired, disconnect the pull-up resistor on CD/DAT[3] (pin 1)
 * of the card. This may be required on certain setups of boards,
 * controllers and embedded sdio device which do not need the card's
 * pull-up. As a result, card detection is disabled and power is saved.
 */
static int sdio_disable_cd(struct mmc_card *card)
{
	int ret;
	u8 ctrl;

	if (!card->cccr.disable_cd)
		return 0;

	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
	if (ret)
		return ret;

	ctrl |= SDIO_BUS_CD_DISABLE;

	return mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
}

/*
 * Test if the card supports high-speed mode and, if so, switch to it.
 */
static int sdio_enable_hs(struct mmc_card *card)
{
	int ret;
	u8 speed;

	if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
		return 0;

	if (!card->cccr.high_speed)
		return 0;

	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
	if (ret)
		return ret;

	speed |= SDIO_SPEED_EHS;

	ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
	if (ret)
		return ret;

	mmc_card_set_highspeed(card);
	mmc_set_timing(card->host, MMC_TIMING_SD_HS);

	return 0;
}

/*
 * Host is being removed. Free up the current card.
 */
static void mmc_sdio_remove(struct mmc_host *host)
{
	int i;

	BUG_ON(!host);
	BUG_ON(!host->card);

	for (i = 0;i < host->card->sdio_funcs;i++) {
		if (host->card->sdio_func[i]) {
			sdio_remove_func(host->card->sdio_func[i]);
			host->card->sdio_func[i] = NULL;
		}
	}

	mmc_remove_card(host->card);
	host->card = NULL;
}

/*
 * Card detection callback from host.
 */
static void mmc_sdio_detect(struct mmc_host *host)
{
	int err;

	BUG_ON(!host);
	BUG_ON(!host->card);

	mmc_claim_host(host);

	/*
	 * Just check if our card has been removed.
	 */
	err = mmc_select_card(host->card);

	mmc_release_host(host);

	if (err) {
		mmc_sdio_remove(host);

		mmc_claim_host(host);
		mmc_detach_bus(host);
		mmc_release_host(host);
	}
}


static const struct mmc_bus_ops mmc_sdio_ops = {
	.remove = mmc_sdio_remove,
	.detect = mmc_sdio_detect,
};


/*
 * Starting point for SDIO card init.
 */
int mmc_attach_sdio(struct mmc_host *host, u32 ocr)
{
	int err;
	int i, funcs;
	struct mmc_card *card;

	BUG_ON(!host);
	WARN_ON(!host->claimed);

	mmc_attach_bus(host, &mmc_sdio_ops);

	/*
	 * Sanity check the voltages that the card claims to
	 * support.
	 */
	if (ocr & 0x7F) {
		printk(KERN_WARNING "%s: card claims to support voltages "
		       "below the defined range. These will be ignored.\n",
		       mmc_hostname(host));
		ocr &= ~0x7F;
	}

	host->ocr = mmc_select_voltage(host, ocr);

	/*
	 * Can we support the voltage(s) of the card(s)?
	 */
	if (!host->ocr) {
		err = -EINVAL;
		goto err;
	}

	/*
	 * Inform the card of the voltage
	 */
	err = mmc_send_io_op_cond(host, host->ocr, &ocr);
	if (err)
		goto err;

	/*
	 * For SPI, enable CRC as appropriate.
	 */
	if (mmc_host_is_spi(host)) {
		err = mmc_spi_set_crc(host, use_spi_crc);
		if (err)
			goto err;
	}

	/*
	 * The number of functions on the card is encoded inside
	 * the ocr.
	 */
	funcs = (ocr & 0x70000000) >> 28;

	/*
	 * Allocate card structure.
	 */
	card = mmc_alloc_card(host, NULL);
	if (IS_ERR(card)) {
		err = PTR_ERR(card);
		goto err;
	}

	card->type = MMC_TYPE_SDIO;
	card->sdio_funcs = funcs;

	host->card = card;

	/*
	 * For native busses:  set card RCA and quit open drain mode.
	 */
	if (!mmc_host_is_spi(host)) {
		err = mmc_send_relative_addr(host, &card->rca);
		if (err)
			goto remove;

		mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
	}

	/*
	 * Select card, as all following commands rely on that.
	 */
	if (!mmc_host_is_spi(host)) {
		err = mmc_select_card(card);
		if (err)
			goto remove;
	}

	/*
	 * Read the common registers.
	 */
	err = sdio_read_cccr(card);
	if (err)
		goto remove;

	/*
	 * Read the common CIS tuples.
	 */
	err = sdio_read_common_cis(card);
	if (err)
		goto remove;

	/*
	 * Switch to high-speed (if supported).
	 */
	err = sdio_enable_hs(card);
	if (err)
		goto remove;

	/*
	 * Change to the card's maximum speed.
	 */
	if (mmc_card_highspeed(card)) {
		/*
		 * The SDIO specification doesn't mention how
		 * the CIS transfer speed register relates to
		 * high-speed, but it seems that 50 MHz is
		 * mandatory.
		 */
		mmc_set_clock(host, 50000000);
	} else {
		mmc_set_clock(host, card->cis.max_dtr);
	}

	/*
	 * Switch to wider bus (if supported).
	 */
	err = sdio_enable_wide(card);
	if (err)
		goto remove;

	/*
	 * If needed, disconnect card detection pull-up resistor.
	 */
	err = sdio_disable_cd(card);
	if (err)
		goto remove;

	/*
	 * Initialize (but don't add) all present functions.
	 */
	for (i = 0;i < funcs;i++) {
		err = sdio_init_func(host->card, i + 1);
		if (err)
			goto remove;
	}

	mmc_release_host(host);

	/*
	 * First add the card to the driver model...
	 */
	err = mmc_add_card(host->card);
	if (err)
		goto remove_added;

	/*
	 * ...then the SDIO functions.
	 */
	for (i = 0;i < funcs;i++) {
		err = sdio_add_func(host->card->sdio_func[i]);
		if (err)
			goto remove_added;
	}

	return 0;


remove_added:
	/* Remove without lock if the device has been added. */
	mmc_sdio_remove(host);
	mmc_claim_host(host);
remove:
	/* And with lock if it hasn't been added. */
	if (host->card)
		mmc_sdio_remove(host);
err:
	mmc_detach_bus(host);
	mmc_release_host(host);

	printk(KERN_ERR "%s: error %d whilst initialising SDIO card\n",
		mmc_hostname(host), err);

	return err;
}
Commit	Line	Data
5c4e6f13 PO	1	/*
	2	* linux/drivers/mmc/sdio.c
	3	*
	4	* Copyright 2006-2007 Pierre Ossman
	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 as published by
	8	* the Free Software Foundation; either version 2 of the License, or (at
	9	* your option) any later version.
	10	*/
	11
	12	#include <linux/err.h>
	13
	14	#include <linux/mmc/host.h>
	15	#include <linux/mmc/card.h>
35c66c19	16	#include <linux/mmc/sdio.h>
e29a7d73	17	#include <linux/mmc/sdio_func.h>
5c4e6f13 PO	18
	19	#include "core.h"
	20	#include "bus.h"
e29a7d73	21	#include "sdio_bus.h"
5c4e6f13 PO	22	#include "mmc_ops.h"
	23	#include "sd_ops.h"
	24	#include "sdio_ops.h"
b7261261	25	#include "sdio_cis.h"
5c4e6f13	26
0597007f PO	27	static int sdio_read_fbr(struct sdio_func *func)
	28	{
	29	int ret;
	30	unsigned char data;
	31
	32	ret = mmc_io_rw_direct(func->card, 0, 0,
7616ee95	33	SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF, 0, &data);
0597007f PO	34	if (ret)
	35	goto out;
	36
	37	data &= 0x0f;
	38
	39	if (data == 0x0f) {
	40	ret = mmc_io_rw_direct(func->card, 0, 0,
7616ee95	41	SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF_EXT, 0, &data);
0597007f PO	42	if (ret)
	43	goto out;
	44	}
	45
	46	func->class = data;
	47
	48	out:
	49	return ret;
	50	}
	51
e29a7d73 PO	52	static int sdio_init_func(struct mmc_card *card, unsigned int fn)
e29a7d73 PO	53	{
0597007f	54	int ret;
e29a7d73 PO	55	struct sdio_func *func;
	56
	57	BUG_ON(fn > SDIO_MAX_FUNCS);
	58
	59	func = sdio_alloc_func(card);
	60	if (IS_ERR(func))
	61	return PTR_ERR(func);
	62
	63	func->num = fn;
	64
0597007f PO	65	ret = sdio_read_fbr(func);
	66	if (ret)
	67	goto fail;
	68
1a632f8c	69	ret = sdio_read_func_cis(func);
b7261261 NP	70	if (ret)
	71	goto fail;
	72
e29a7d73 PO	73	card->sdio_func[fn - 1] = func;
	74
	75	return 0;
0597007f PO	76
	77	fail:
	78	/*
	79	* It is okay to remove the function here even though we hold
	80	* the host lock as we haven't registered the device yet.
	81	*/
	82	sdio_remove_func(func);
	83	return ret;
e29a7d73 PO	84	}
e29a7d73 PO	85
35c66c19 PO	86	static int sdio_read_cccr(struct mmc_card *card)
	87	{
	88	int ret;
	89	int cccr_vsn;
	90	unsigned char data;
	91
	92	memset(&card->cccr, 0, sizeof(struct sdio_cccr));
	93
	94	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CCCR, 0, &data);
	95	if (ret)
	96	goto out;
	97
	98	cccr_vsn = data & 0x0f;
	99
	100	if (cccr_vsn > SDIO_CCCR_REV_1_20) {
	101	printk(KERN_ERR "%s: unrecognised CCCR structure version %d\n",
	102	mmc_hostname(card->host), cccr_vsn);
	103	return -EINVAL;
	104	}
	105
	106	card->cccr.sdio_vsn = (data & 0xf0) >> 4;
	107
	108	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CAPS, 0, &data);
	109	if (ret)
	110	goto out;
	111
	112	if (data & SDIO_CCCR_CAP_SMB)
	113	card->cccr.multi_block = 1;
	114	if (data & SDIO_CCCR_CAP_LSC)
	115	card->cccr.low_speed = 1;
	116	if (data & SDIO_CCCR_CAP_4BLS)
	117	card->cccr.wide_bus = 1;
	118
	119	if (cccr_vsn >= SDIO_CCCR_REV_1_10) {
	120	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_POWER, 0, &data);
	121	if (ret)
	122	goto out;
	123
	124	if (data & SDIO_POWER_SMPC)
	125	card->cccr.high_power = 1;
	126	}
	127
	128	if (cccr_vsn >= SDIO_CCCR_REV_1_20) {
	129	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &data);
	130	if (ret)
	131	goto out;
	132
	133	if (data & SDIO_SPEED_SHS)
	134	card->cccr.high_speed = 1;
	135	}
	136
	137	out:
	138	return ret;
	139	}
	140
4ff6471c PO	141	static int sdio_enable_wide(struct mmc_card *card)
	142	{
	143	int ret;
	144	u8 ctrl;
	145
	146	if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
	147	return 0;
	148
	149	if (card->cccr.low_speed && !card->cccr.wide_bus)
	150	return 0;
	151
	152	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
	153	if (ret)
	154	return ret;
	155
	156	ctrl \|= SDIO_BUS_WIDTH_4BIT;
	157
	158	ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
	159	if (ret)
	160	return ret;
	161
	162	mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
	163
	164	return 0;
	165	}
	166
006ebd5d OBC	167	/*
	168	* If desired, disconnect the pull-up resistor on CD/DAT[3] (pin 1)
	169	* of the card. This may be required on certain setups of boards,
	170	* controllers and embedded sdio device which do not need the card's
	171	* pull-up. As a result, card detection is disabled and power is saved.
	172	*/
	173	static int sdio_disable_cd(struct mmc_card *card)
	174	{
	175	int ret;
	176	u8 ctrl;
	177
	178	if (!card->cccr.disable_cd)
	179	return 0;
	180
	181	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
	182	if (ret)
	183	return ret;
	184
	185	ctrl \|= SDIO_BUS_CD_DISABLE;
	186
	187	return mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
	188	}
	189
d16f5770 PO	190	/*
	191	* Test if the card supports high-speed mode and, if so, switch to it.
	192	*/
	193	static int sdio_enable_hs(struct mmc_card *card)
	194	{
	195	int ret;
	196	u8 speed;
	197
	198	if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
	199	return 0;
	200
	201	if (!card->cccr.high_speed)
	202	return 0;
	203
	204	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
	205	if (ret)
	206	return ret;
	207
	208	speed \|= SDIO_SPEED_EHS;
	209
	210	ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
	211	if (ret)
	212	return ret;
	213
	214	mmc_card_set_highspeed(card);
	215	mmc_set_timing(card->host, MMC_TIMING_SD_HS);
	216
	217	return 0;
	218	}
	219
5c4e6f13 PO	220	/*
	221	* Host is being removed. Free up the current card.
	222	*/
	223	static void mmc_sdio_remove(struct mmc_host *host)
	224	{
e29a7d73 PO	225	int i;
e29a7d73 PO	226
5c4e6f13 PO	227	BUG_ON(!host);
	228	BUG_ON(!host->card);
	229
e29a7d73 PO	230	for (i = 0;i < host->card->sdio_funcs;i++) {
	231	if (host->card->sdio_func[i]) {
	232	sdio_remove_func(host->card->sdio_func[i]);
	233	host->card->sdio_func[i] = NULL;
	234	}
	235	}
	236
5c4e6f13 PO	237	mmc_remove_card(host->card);
	238	host->card = NULL;
	239	}
	240
	241	/*
	242	* Card detection callback from host.
	243	*/
	244	static void mmc_sdio_detect(struct mmc_host *host)
	245	{
	246	int err;
	247
	248	BUG_ON(!host);
	249	BUG_ON(!host->card);
	250
	251	mmc_claim_host(host);
	252
	253	/*
	254	* Just check if our card has been removed.
	255	*/
	256	err = mmc_select_card(host->card);
	257
	258	mmc_release_host(host);
	259
	260	if (err) {
	261	mmc_sdio_remove(host);
	262
	263	mmc_claim_host(host);
	264	mmc_detach_bus(host);
	265	mmc_release_host(host);
	266	}
	267	}
	268
	269
	270	static const struct mmc_bus_ops mmc_sdio_ops = {
	271	.remove = mmc_sdio_remove,
	272	.detect = mmc_sdio_detect,
	273	};
	274
	275
	276	/*
	277	* Starting point for SDIO card init.
	278	*/
	279	int mmc_attach_sdio(struct mmc_host *host, u32 ocr)
	280	{
	281	int err;
e29a7d73	282	int i, funcs;
5c4e6f13 PO	283	struct mmc_card *card;
	284
	285	BUG_ON(!host);
d84075c8	286	WARN_ON(!host->claimed);
5c4e6f13 PO	287
	288	mmc_attach_bus(host, &mmc_sdio_ops);
	289
	290	/*
	291	* Sanity check the voltages that the card claims to
	292	* support.
	293	*/
	294	if (ocr & 0x7F) {
	295	printk(KERN_WARNING "%s: card claims to support voltages "
	296	"below the defined range. These will be ignored.\n",
	297	mmc_hostname(host));
	298	ocr &= ~0x7F;
	299	}
	300
5c4e6f13 PO	301	host->ocr = mmc_select_voltage(host, ocr);
	302
	303	/*
	304	* Can we support the voltage(s) of the card(s)?
	305	*/
	306	if (!host->ocr) {
	307	err = -EINVAL;
	308	goto err;
	309	}
	310
	311	/*
	312	* Inform the card of the voltage
	313	*/
	314	err = mmc_send_io_op_cond(host, host->ocr, &ocr);
	315	if (err)
	316	goto err;
	317
af517150 DB	318	/*
	319	* For SPI, enable CRC as appropriate.
	320	*/
	321	if (mmc_host_is_spi(host)) {
	322	err = mmc_spi_set_crc(host, use_spi_crc);
	323	if (err)
	324	goto err;
	325	}
	326
5c4e6f13 PO	327	/*
	328	* The number of functions on the card is encoded inside
	329	* the ocr.
	330	*/
	331	funcs = (ocr & 0x70000000) >> 28;
	332
	333	/*
	334	* Allocate card structure.
	335	*/
51ec92e2	336	card = mmc_alloc_card(host, NULL);
5c4e6f13 PO	337	if (IS_ERR(card)) {
	338	err = PTR_ERR(card);
	339	goto err;
	340	}
	341
	342	card->type = MMC_TYPE_SDIO;
e29a7d73 PO	343	card->sdio_funcs = funcs;
	344
	345	host->card = card;
5c4e6f13 PO	346
5c4e6f13 PO	347	/*
af517150	348	* For native busses: set card RCA and quit open drain mode.
5c4e6f13	349	*/
af517150 DB	350	if (!mmc_host_is_spi(host)) {
	351	err = mmc_send_relative_addr(host, &card->rca);
	352	if (err)
	353	goto remove;
5c4e6f13	354
af517150 DB	355	mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
af517150 DB	356	}
5c4e6f13 PO	357
	358	/*
	359	* Select card, as all following commands rely on that.
	360	*/
af517150 DB	361	if (!mmc_host_is_spi(host)) {
	362	err = mmc_select_card(card);
	363	if (err)
	364	goto remove;
	365	}
5c4e6f13	366
35c66c19 PO	367	/*
	368	* Read the common registers.
	369	*/
	370	err = sdio_read_cccr(card);
	371	if (err)
	372	goto remove;
	373
1a632f8c PO	374	/*
	375	* Read the common CIS tuples.
	376	*/
	377	err = sdio_read_common_cis(card);
	378	if (err)
	379	goto remove;
	380
6db5020e	381	/*
d16f5770	382	* Switch to high-speed (if supported).
6db5020e	383	*/
d16f5770 PO	384	err = sdio_enable_hs(card);
	385	if (err)
	386	goto remove;
	387
	388	/*
	389	* Change to the card's maximum speed.
	390	*/
	391	if (mmc_card_highspeed(card)) {
	392	/*
	393	* The SDIO specification doesn't mention how
	394	* the CIS transfer speed register relates to
	395	* high-speed, but it seems that 50 MHz is
	396	* mandatory.
	397	*/
	398	mmc_set_clock(host, 50000000);
	399	} else {
	400	mmc_set_clock(host, card->cis.max_dtr);
	401	}
6db5020e	402
4ff6471c PO	403	/*
	404	* Switch to wider bus (if supported).
	405	*/
	406	err = sdio_enable_wide(card);
	407	if (err)
	408	goto remove;
	409
006ebd5d OBC	410	/*
	411	* If needed, disconnect card detection pull-up resistor.
	412	*/
	413	err = sdio_disable_cd(card);
	414	if (err)
	415	goto remove;
	416
e29a7d73 PO	417	/*
	418	* Initialize (but don't add) all present functions.
	419	*/
	420	for (i = 0;i < funcs;i++) {
	421	err = sdio_init_func(host->card, i + 1);
	422	if (err)
	423	goto remove;
	424	}
5c4e6f13 PO	425
	426	mmc_release_host(host);
	427
e29a7d73 PO	428	/*
	429	* First add the card to the driver model...
	430	*/
5c4e6f13 PO	431	err = mmc_add_card(host->card);
5c4e6f13 PO	432	if (err)
e29a7d73 PO	433	goto remove_added;
	434
	435	/*
	436	* ...then the SDIO functions.
	437	*/
	438	for (i = 0;i < funcs;i++) {
	439	err = sdio_add_func(host->card->sdio_func[i]);
	440	if (err)
	441	goto remove_added;
	442	}
5c4e6f13 PO	443
	444	return 0;
	445
e29a7d73 PO	446
	447	remove_added:
	448	/* Remove without lock if the device has been added. */
	449	mmc_sdio_remove(host);
5c4e6f13	450	mmc_claim_host(host);
e29a7d73 PO	451	remove:
	452	/* And with lock if it hasn't been added. */
	453	if (host->card)
	454	mmc_sdio_remove(host);
5c4e6f13 PO	455	err:
	456	mmc_detach_bus(host);
	457	mmc_release_host(host);
	458
	459	printk(KERN_ERR "%s: error %d whilst initialising SDIO card\n",
	460	mmc_hostname(host), err);
	461
	462	return err;
	463	}
	464