[mirror_ubuntu-artful-kernel.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/pm_runtime.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 "sd.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;

	if (!(card->quirks & MMC_QUIRK_NONSTD_SDIO)) {
		ret = sdio_read_fbr(func);
		if (ret)
			goto fail;

		ret = sdio_read_func_cis(func);
		if (ret)
			goto fail;
	} else {
		func->vendor = func->card->cis.vendor;
		func->device = func->card->cis.device;
		func->max_blksize = func->card->cis.blksize;
	}

	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;

	return 1;
}

/*
 * 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);
}

/*
 * Devices that remain active during a system suspend are
 * put back into 1-bit mode.
 */
static int sdio_disable_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;

	if (!(ctrl & SDIO_BUS_WIDTH_4BIT))
		return 0;

	ctrl &= ~SDIO_BUS_WIDTH_4BIT;
	ctrl |= SDIO_BUS_ASYNC_INT;

	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_1);

	return 0;
}


static int sdio_enable_4bit_bus(struct mmc_card *card)
{
	int err;

	if (card->type == MMC_TYPE_SDIO)
		return sdio_enable_wide(card);

	if ((card->host->caps & MMC_CAP_4_BIT_DATA) &&
		(card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
		err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
		if (err)
			return err;
	} else
		return 0;

	err = sdio_enable_wide(card);
	if (err <= 0)
		mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1);

	return err;
}


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

	if (enable)
		speed |= SDIO_SPEED_EHS;
	else
		speed &= ~SDIO_SPEED_EHS;

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

	return 1;
}

/*
 * Enable SDIO/combo card's high-speed mode. Return 0/1 if [not]supported.
 */
static int sdio_enable_hs(struct mmc_card *card)
{
	int ret;

	ret = mmc_sdio_switch_hs(card, true);
	if (ret <= 0 || card->type == MMC_TYPE_SDIO)
		return ret;

	ret = mmc_sd_switch_hs(card);
	if (ret <= 0)
		mmc_sdio_switch_hs(card, false);

	return ret;
}

static unsigned mmc_sdio_get_max_clock(struct mmc_card *card)
{
	unsigned max_dtr;

	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.
		 */
		max_dtr = 50000000;
	} else {
		max_dtr = card->cis.max_dtr;
	}

	if (card->type == MMC_TYPE_SD_COMBO)
		max_dtr = min(max_dtr, mmc_sd_get_max_clock(card));

	return max_dtr;
}

/*
 * Handle the detection and initialisation of a card.
 *
 * In the case of a resume, "oldcard" will contain the card
 * we're trying to reinitialise.
 */
static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
			      struct mmc_card *oldcard, int powered_resume)
{
	struct mmc_card *card;
	int err;

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

	/*
	 * Inform the card of the voltage
	 */
	if (!powered_resume) {
		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;
	}

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

	if (ocr & R4_MEMORY_PRESENT
	    && mmc_sd_get_cid(host, host->ocr & ocr, card->raw_cid) == 0) {
		card->type = MMC_TYPE_SD_COMBO;

		if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO ||
		    memcmp(card->raw_cid, oldcard->raw_cid, sizeof(card->raw_cid)) != 0)) {
			mmc_remove_card(card);
			return -ENOENT;
		}
	} else {
		card->type = MMC_TYPE_SDIO;

		if (oldcard && oldcard->type != MMC_TYPE_SDIO) {
			mmc_remove_card(card);
			return -ENOENT;
		}
	}

	/*
	 * Call the optional HC's init_card function to handle quirks.
	 */
	if (host->ops->init_card)
		host->ops->init_card(host, card);

	/*
	 * For native busses:  set card RCA and quit open drain mode.
	 */
	if (!powered_resume && !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);
	}

	/*
	 * Read CSD, before selecting the card
	 */
	if (!oldcard && card->type == MMC_TYPE_SD_COMBO) {
		err = mmc_sd_get_csd(host, card);
		if (err)
			return err;

		mmc_decode_cid(card);
	}

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

	if (card->quirks & MMC_QUIRK_NONSTD_SDIO) {
		/*
		 * This is non-standard SDIO device, meaning it doesn't
		 * have any CIA (Common I/O area) registers present.
		 * It's host's responsibility to fill cccr and cis
		 * structures in init_card().
		 */
		mmc_set_clock(host, card->cis.max_dtr);

		if (card->cccr.high_speed) {
			mmc_card_set_highspeed(card);
			mmc_set_timing(card->host, MMC_TIMING_SD_HS);
		}

		goto finish;
	}

	/*
	 * 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;

	if (oldcard) {
		int same = (card->cis.vendor == oldcard->cis.vendor &&
			    card->cis.device == oldcard->cis.device);
		mmc_remove_card(card);
		if (!same)
			return -ENOENT;

		card = oldcard;
	}

	if (card->type == MMC_TYPE_SD_COMBO) {
		err = mmc_sd_setup_card(host, card, oldcard != NULL);
		/* handle as SDIO-only card if memory init failed */
		if (err) {
			mmc_go_idle(host);
			if (mmc_host_is_spi(host))
				/* should not fail, as it worked previously */
				mmc_spi_set_crc(host, use_spi_crc);
			card->type = MMC_TYPE_SDIO;
		} else
			card->dev.type = &sd_type;
	}

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

	/*
	 * Switch to high-speed (if supported).
	 */
	err = sdio_enable_hs(card);
	if (err > 0)
		mmc_sd_go_highspeed(card);
	else if (err)
		goto remove;

	/*
	 * Change to the card's maximum speed.
	 */
	mmc_set_clock(host, mmc_sdio_get_max_clock(card));

	/*
	 * Switch to wider bus (if supported).
	 */
	err = sdio_enable_4bit_bus(card);
	if (err > 0)
		mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
	else if (err)
		goto remove;

finish:
	if (!oldcard)
		host->card = card;
	return 0;

remove:
	if (!oldcard)
		mmc_remove_card(card);

err:
	return err;
}

/*
 * 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);

	/* Make sure card is powered before detecting it */
	if (host->caps & MMC_CAP_POWER_OFF_CARD) {
		err = pm_runtime_get_sync(&host->card->dev);
		if (err < 0)
			goto out;
	}

	mmc_claim_host(host);

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

	mmc_release_host(host);

	/*
	 * Tell PM core it's OK to power off the card now.
	 *
	 * The _sync variant is used in order to ensure that the card
	 * is left powered off in case an error occurred, and the card
	 * is going to be removed.
	 *
	 * Since there is no specific reason to believe a new user
	 * is about to show up at this point, the _sync variant is
	 * desirable anyway.
	 */
	if (host->caps & MMC_CAP_POWER_OFF_CARD)
		pm_runtime_put_sync(&host->card->dev);

out:
	if (err) {
		mmc_sdio_remove(host);

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

/*
 * SDIO suspend.  We need to suspend all functions separately.
 * Therefore all registered functions must have drivers with suspend
 * and resume methods.  Failing that we simply remove the whole card.
 */
static int mmc_sdio_suspend(struct mmc_host *host)
{
	int i, err = 0;

	for (i = 0; i < host->card->sdio_funcs; i++) {
		struct sdio_func *func = host->card->sdio_func[i];
		if (func && sdio_func_present(func) && func->dev.driver) {
			const struct dev_pm_ops *pmops = func->dev.driver->pm;
			if (!pmops || !pmops->suspend || !pmops->resume) {
				/* force removal of entire card in that case */
				err = -ENOSYS;
			} else
				err = pmops->suspend(&func->dev);
			if (err)
				break;
		}
	}
	while (err && --i >= 0) {
		struct sdio_func *func = host->card->sdio_func[i];
		if (func && sdio_func_present(func) && func->dev.driver) {
			const struct dev_pm_ops *pmops = func->dev.driver->pm;
			pmops->resume(&func->dev);
		}
	}

	if (!err && host->pm_flags & MMC_PM_KEEP_POWER) {
		mmc_claim_host(host);
		sdio_disable_wide(host->card);
		mmc_release_host(host);
	}

	return err;
}

static int mmc_sdio_resume(struct mmc_host *host)
{
	int i, err;

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

	/* Basic card reinitialization. */
	mmc_claim_host(host);
	err = mmc_sdio_init_card(host, host->ocr, host->card,
				 (host->pm_flags & MMC_PM_KEEP_POWER));
	if (!err && host->sdio_irqs)
		mmc_signal_sdio_irq(host);
	mmc_release_host(host);

	/*
	 * If the card looked to be the same as before suspending, then
	 * we proceed to resume all card functions.  If one of them returns
	 * an error then we simply return that error to the core and the
	 * card will be redetected as new.  It is the responsibility of
	 * the function driver to perform further tests with the extra
	 * knowledge it has of the card to confirm the card is indeed the
	 * same as before suspending (same MAC address for network cards,
	 * etc.) and return an error otherwise.
	 */
	for (i = 0; !err && i < host->card->sdio_funcs; i++) {
		struct sdio_func *func = host->card->sdio_func[i];
		if (func && sdio_func_present(func) && func->dev.driver) {
			const struct dev_pm_ops *pmops = func->dev.driver->pm;
			err = pmops->resume(&func->dev);
		}
	}

	return err;
}

static int mmc_sdio_power_restore(struct mmc_host *host)
{
	int ret;

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

	mmc_claim_host(host);
	ret = mmc_sdio_init_card(host, host->ocr, host->card,
			(host->pm_flags & MMC_PM_KEEP_POWER));
	if (!ret && host->sdio_irqs)
		mmc_signal_sdio_irq(host);
	mmc_release_host(host);

	return ret;
}

static const struct mmc_bus_ops mmc_sdio_ops = {
	.remove = mmc_sdio_remove,
	.detect = mmc_sdio_detect,
	.suspend = mmc_sdio_suspend,
	.resume = mmc_sdio_resume,
	.power_restore = mmc_sdio_power_restore,
};


/*
 * 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;
	}

	/*
	 * Detect and init the card.
	 */
	err = mmc_sdio_init_card(host, host->ocr, NULL, 0);
	if (err)
		goto err;
	card = host->card;

	/*
	 * Enable runtime PM only if supported by host+card+board
	 */
	if (host->caps & MMC_CAP_POWER_OFF_CARD) {
		/*
		 * Let runtime PM core know our card is active
		 */
		err = pm_runtime_set_active(&card->dev);
		if (err)
			goto remove;

		/*
		 * Enable runtime PM for this card
		 */
		pm_runtime_enable(&card->dev);
	}

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

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

		/*
		 * Enable Runtime PM for this func (if supported)
		 */
		if (host->caps & MMC_CAP_POWER_OFF_CARD)
			pm_runtime_enable(&card->sdio_func[i]->dev);
	}

	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>
81968561	13	#include <linux/pm_runtime.h>
5c4e6f13 PO	14
	15	#include <linux/mmc/host.h>
	16	#include <linux/mmc/card.h>
35c66c19	17	#include <linux/mmc/sdio.h>
e29a7d73	18	#include <linux/mmc/sdio_func.h>
5c4e6f13 PO	19
	20	#include "core.h"
	21	#include "bus.h"
71578a1e	22	#include "sd.h"
e29a7d73	23	#include "sdio_bus.h"
5c4e6f13 PO	24	#include "mmc_ops.h"
	25	#include "sd_ops.h"
	26	#include "sdio_ops.h"
b7261261	27	#include "sdio_cis.h"
5c4e6f13	28
0597007f PO	29	static int sdio_read_fbr(struct sdio_func *func)
	30	{
	31	int ret;
	32	unsigned char data;
	33
	34	ret = mmc_io_rw_direct(func->card, 0, 0,
7616ee95	35	SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF, 0, &data);
0597007f PO	36	if (ret)
	37	goto out;
	38
	39	data &= 0x0f;
	40
	41	if (data == 0x0f) {
	42	ret = mmc_io_rw_direct(func->card, 0, 0,
7616ee95	43	SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF_EXT, 0, &data);
0597007f PO	44	if (ret)
	45	goto out;
	46	}
	47
	48	func->class = data;
	49
	50	out:
	51	return ret;
	52	}
	53
e29a7d73 PO	54	static int sdio_init_func(struct mmc_card *card, unsigned int fn)
e29a7d73 PO	55	{
0597007f	56	int ret;
e29a7d73 PO	57	struct sdio_func *func;
	58
	59	BUG_ON(fn > SDIO_MAX_FUNCS);
	60
	61	func = sdio_alloc_func(card);
	62	if (IS_ERR(func))
	63	return PTR_ERR(func);
	64
	65	func->num = fn;
	66
6f51be3d GI	67	if (!(card->quirks & MMC_QUIRK_NONSTD_SDIO)) {
	68	ret = sdio_read_fbr(func);
	69	if (ret)
	70	goto fail;
0597007f	71
6f51be3d GI	72	ret = sdio_read_func_cis(func);
	73	if (ret)
	74	goto fail;
	75	} else {
	76	func->vendor = func->card->cis.vendor;
	77	func->device = func->card->cis.device;
	78	func->max_blksize = func->card->cis.blksize;
	79	}
b7261261	80
e29a7d73 PO	81	card->sdio_func[fn - 1] = func;
	82
	83	return 0;
0597007f PO	84
	85	fail:
	86	/*
	87	* It is okay to remove the function here even though we hold
	88	* the host lock as we haven't registered the device yet.
	89	*/
	90	sdio_remove_func(func);
	91	return ret;
e29a7d73 PO	92	}
e29a7d73 PO	93
35c66c19 PO	94	static int sdio_read_cccr(struct mmc_card *card)
	95	{
	96	int ret;
	97	int cccr_vsn;
	98	unsigned char data;
	99
	100	memset(&card->cccr, 0, sizeof(struct sdio_cccr));
	101
	102	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CCCR, 0, &data);
	103	if (ret)
	104	goto out;
	105
	106	cccr_vsn = data & 0x0f;
	107
	108	if (cccr_vsn > SDIO_CCCR_REV_1_20) {
	109	printk(KERN_ERR "%s: unrecognised CCCR structure version %d\n",
	110	mmc_hostname(card->host), cccr_vsn);
	111	return -EINVAL;
	112	}
	113
	114	card->cccr.sdio_vsn = (data & 0xf0) >> 4;
	115
	116	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CAPS, 0, &data);
	117	if (ret)
	118	goto out;
	119
	120	if (data & SDIO_CCCR_CAP_SMB)
	121	card->cccr.multi_block = 1;
	122	if (data & SDIO_CCCR_CAP_LSC)
	123	card->cccr.low_speed = 1;
	124	if (data & SDIO_CCCR_CAP_4BLS)
	125	card->cccr.wide_bus = 1;
	126
	127	if (cccr_vsn >= SDIO_CCCR_REV_1_10) {
	128	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_POWER, 0, &data);
	129	if (ret)
	130	goto out;
	131
	132	if (data & SDIO_POWER_SMPC)
	133	card->cccr.high_power = 1;
	134	}
	135
	136	if (cccr_vsn >= SDIO_CCCR_REV_1_20) {
	137	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &data);
	138	if (ret)
	139	goto out;
	140
	141	if (data & SDIO_SPEED_SHS)
	142	card->cccr.high_speed = 1;
	143	}
	144
	145	out:
	146	return ret;
	147	}
	148
4ff6471c PO	149	static int sdio_enable_wide(struct mmc_card *card)
	150	{
	151	int ret;
	152	u8 ctrl;
	153
	154	if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
	155	return 0;
	156
	157	if (card->cccr.low_speed && !card->cccr.wide_bus)
	158	return 0;
	159
	160	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
	161	if (ret)
	162	return ret;
	163
	164	ctrl \|= SDIO_BUS_WIDTH_4BIT;
	165
	166	ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
	167	if (ret)
	168	return ret;
	169
7310ece8	170	return 1;
4ff6471c PO	171	}
4ff6471c PO	172
006ebd5d OBC	173	/*
	174	* If desired, disconnect the pull-up resistor on CD/DAT[3] (pin 1)
	175	* of the card. This may be required on certain setups of boards,
	176	* controllers and embedded sdio device which do not need the card's
	177	* pull-up. As a result, card detection is disabled and power is saved.
	178	*/
	179	static int sdio_disable_cd(struct mmc_card *card)
	180	{
	181	int ret;
	182	u8 ctrl;
	183
	184	if (!card->cccr.disable_cd)
	185	return 0;
	186
	187	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
	188	if (ret)
	189	return ret;
	190
	191	ctrl \|= SDIO_BUS_CD_DISABLE;
	192
	193	return mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
	194	}
	195
6b5eda36 DD	196	/*
	197	* Devices that remain active during a system suspend are
	198	* put back into 1-bit mode.
	199	*/
	200	static int sdio_disable_wide(struct mmc_card *card)
	201	{
	202	int ret;
	203	u8 ctrl;
	204
	205	if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
	206	return 0;
	207
	208	if (card->cccr.low_speed && !card->cccr.wide_bus)
	209	return 0;
	210
	211	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
	212	if (ret)
	213	return ret;
	214
	215	if (!(ctrl & SDIO_BUS_WIDTH_4BIT))
	216	return 0;
	217
	218	ctrl &= ~SDIO_BUS_WIDTH_4BIT;
	219	ctrl \|= SDIO_BUS_ASYNC_INT;
	220
	221	ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
	222	if (ret)
	223	return ret;
	224
	225	mmc_set_bus_width(card->host, MMC_BUS_WIDTH_1);
	226
	227	return 0;
	228	}
	229
7310ece8 MM	230
	231	static int sdio_enable_4bit_bus(struct mmc_card *card)
	232	{
	233	int err;
	234
	235	if (card->type == MMC_TYPE_SDIO)
	236	return sdio_enable_wide(card);
	237
	238	if ((card->host->caps & MMC_CAP_4_BIT_DATA) &&
	239	(card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
	240	err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
	241	if (err)
	242	return err;
	243	} else
	244	return 0;
	245
	246	err = sdio_enable_wide(card);
	247	if (err <= 0)
	248	mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1);
	249
	250	return err;
	251	}
	252
	253
d16f5770 PO	254	/*
	255	* Test if the card supports high-speed mode and, if so, switch to it.
	256	*/
7310ece8	257	static int mmc_sdio_switch_hs(struct mmc_card *card, int enable)
d16f5770 PO	258	{
	259	int ret;
	260	u8 speed;
	261
	262	if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
	263	return 0;
	264
	265	if (!card->cccr.high_speed)
	266	return 0;
	267
	268	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
	269	if (ret)
	270	return ret;
	271
7310ece8 MM	272	if (enable)
	273	speed \|= SDIO_SPEED_EHS;
	274	else
	275	speed &= ~SDIO_SPEED_EHS;
d16f5770 PO	276
	277	ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
	278	if (ret)
	279	return ret;
	280
71578a1e MM	281	return 1;
71578a1e MM	282	}
d16f5770	283
7310ece8 MM	284	/*
	285	* Enable SDIO/combo card's high-speed mode. Return 0/1 if [not]supported.
	286	*/
	287	static int sdio_enable_hs(struct mmc_card *card)
	288	{
	289	int ret;
	290
	291	ret = mmc_sdio_switch_hs(card, true);
	292	if (ret <= 0 \|\| card->type == MMC_TYPE_SDIO)
	293	return ret;
	294
	295	ret = mmc_sd_switch_hs(card);
	296	if (ret <= 0)
	297	mmc_sdio_switch_hs(card, false);
	298
	299	return ret;
	300	}
	301
71578a1e MM	302	static unsigned mmc_sdio_get_max_clock(struct mmc_card *card)
	303	{
	304	unsigned max_dtr;
	305
	306	if (mmc_card_highspeed(card)) {
	307	/*
	308	* The SDIO specification doesn't mention how
	309	* the CIS transfer speed register relates to
	310	* high-speed, but it seems that 50 MHz is
	311	* mandatory.
	312	*/
	313	max_dtr = 50000000;
	314	} else {
	315	max_dtr = card->cis.max_dtr;
	316	}
	317
7310ece8 MM	318	if (card->type == MMC_TYPE_SD_COMBO)
	319	max_dtr = min(max_dtr, mmc_sd_get_max_clock(card));
	320
71578a1e	321	return max_dtr;
d16f5770 PO	322	}
d16f5770 PO	323
17d33e14 NP	324	/*
	325	* Handle the detection and initialisation of a card.
	326	*
	327	* In the case of a resume, "oldcard" will contain the card
	328	* we're trying to reinitialise.
	329	*/
	330	static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
3bca4cf7	331	struct mmc_card *oldcard, int powered_resume)
17d33e14 NP	332	{
	333	struct mmc_card *card;
	334	int err;
	335
	336	BUG_ON(!host);
	337	WARN_ON(!host->claimed);
	338
	339	/*
	340	* Inform the card of the voltage
	341	*/
3bca4cf7 CB	342	if (!powered_resume) {
	343	err = mmc_send_io_op_cond(host, host->ocr, &ocr);
	344	if (err)
	345	goto err;
	346	}
17d33e14 NP	347
	348	/*
	349	* For SPI, enable CRC as appropriate.
	350	*/
	351	if (mmc_host_is_spi(host)) {
	352	err = mmc_spi_set_crc(host, use_spi_crc);
	353	if (err)
	354	goto err;
	355	}
	356
	357	/*
	358	* Allocate card structure.
	359	*/
	360	card = mmc_alloc_card(host, NULL);
	361	if (IS_ERR(card)) {
	362	err = PTR_ERR(card);
	363	goto err;
	364	}
	365
f3c65b28 DV	366	if (ocr & R4_MEMORY_PRESENT
f3c65b28 DV	367	&& mmc_sd_get_cid(host, host->ocr & ocr, card->raw_cid) == 0) {
7310ece8 MM	368	card->type = MMC_TYPE_SD_COMBO;
	369
	370	if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO \|\|
	371	memcmp(card->raw_cid, oldcard->raw_cid, sizeof(card->raw_cid)) != 0)) {
	372	mmc_remove_card(card);
	373	return -ENOENT;
	374	}
	375	} else {
	376	card->type = MMC_TYPE_SDIO;
	377
	378	if (oldcard && oldcard->type != MMC_TYPE_SDIO) {
	379	mmc_remove_card(card);
	380	return -ENOENT;
	381	}
	382	}
17d33e14	383
3fcb027d DM	384	/*
	385	* Call the optional HC's init_card function to handle quirks.
	386	*/
	387	if (host->ops->init_card)
	388	host->ops->init_card(host, card);
	389
17d33e14 NP	390	/*
	391	* For native busses: set card RCA and quit open drain mode.
	392	*/
3bca4cf7	393	if (!powered_resume && !mmc_host_is_spi(host)) {
17d33e14 NP	394	err = mmc_send_relative_addr(host, &card->rca);
	395	if (err)
	396	goto remove;
	397
	398	mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
	399	}
	400
7310ece8 MM	401	/*
	402	* Read CSD, before selecting the card
	403	*/
	404	if (!oldcard && card->type == MMC_TYPE_SD_COMBO) {
	405	err = mmc_sd_get_csd(host, card);
	406	if (err)
	407	return err;
	408
	409	mmc_decode_cid(card);
	410	}
	411
17d33e14 NP	412	/*
	413	* Select card, as all following commands rely on that.
	414	*/
3bca4cf7	415	if (!powered_resume && !mmc_host_is_spi(host)) {
17d33e14 NP	416	err = mmc_select_card(card);
	417	if (err)
	418	goto remove;
	419	}
	420
6f51be3d GI	421	if (card->quirks & MMC_QUIRK_NONSTD_SDIO) {
	422	/*
	423	* This is non-standard SDIO device, meaning it doesn't
	424	* have any CIA (Common I/O area) registers present.
	425	* It's host's responsibility to fill cccr and cis
	426	* structures in init_card().
	427	*/
	428	mmc_set_clock(host, card->cis.max_dtr);
	429
	430	if (card->cccr.high_speed) {
	431	mmc_card_set_highspeed(card);
	432	mmc_set_timing(card->host, MMC_TIMING_SD_HS);
	433	}
	434
	435	goto finish;
	436	}
	437
17d33e14 NP	438	/*
	439	* Read the common registers.
	440	*/
	441	err = sdio_read_cccr(card);
	442	if (err)
	443	goto remove;
	444
	445	/*
	446	* Read the common CIS tuples.
	447	*/
	448	err = sdio_read_common_cis(card);
	449	if (err)
	450	goto remove;
	451
	452	if (oldcard) {
	453	int same = (card->cis.vendor == oldcard->cis.vendor &&
	454	card->cis.device == oldcard->cis.device);
	455	mmc_remove_card(card);
7310ece8 MM	456	if (!same)
	457	return -ENOENT;
	458
17d33e14 NP	459	card = oldcard;
	460	}
	461
7310ece8 MM	462	if (card->type == MMC_TYPE_SD_COMBO) {
	463	err = mmc_sd_setup_card(host, card, oldcard != NULL);
	464	/* handle as SDIO-only card if memory init failed */
	465	if (err) {
	466	mmc_go_idle(host);
	467	if (mmc_host_is_spi(host))
	468	/* should not fail, as it worked previously */
	469	mmc_spi_set_crc(host, use_spi_crc);
	470	card->type = MMC_TYPE_SDIO;
	471	} else
	472	card->dev.type = &sd_type;
	473	}
	474
	475	/*
	476	* If needed, disconnect card detection pull-up resistor.
	477	*/
	478	err = sdio_disable_cd(card);
	479	if (err)
	480	goto remove;
	481
17d33e14 NP	482	/*
	483	* Switch to high-speed (if supported).
	484	*/
	485	err = sdio_enable_hs(card);
71578a1e MM	486	if (err > 0)
	487	mmc_sd_go_highspeed(card);
	488	else if (err)
17d33e14 NP	489	goto remove;
	490
	491	/*
	492	* Change to the card's maximum speed.
	493	*/
71578a1e	494	mmc_set_clock(host, mmc_sdio_get_max_clock(card));
17d33e14 NP	495
	496	/*
	497	* Switch to wider bus (if supported).
	498	*/
7310ece8 MM	499	err = sdio_enable_4bit_bus(card);
	500	if (err > 0)
	501	mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
	502	else if (err)
17d33e14 NP	503	goto remove;
17d33e14 NP	504
6f51be3d	505	finish:
17d33e14 NP	506	if (!oldcard)
	507	host->card = card;
	508	return 0;
	509
	510	remove:
	511	if (!oldcard)
	512	mmc_remove_card(card);
	513
	514	err:
	515	return err;
	516	}
	517
5c4e6f13 PO	518	/*
	519	* Host is being removed. Free up the current card.
	520	*/
	521	static void mmc_sdio_remove(struct mmc_host *host)
	522	{
e29a7d73 PO	523	int i;
e29a7d73 PO	524
5c4e6f13 PO	525	BUG_ON(!host);
	526	BUG_ON(!host->card);
	527
e29a7d73 PO	528	for (i = 0;i < host->card->sdio_funcs;i++) {
	529	if (host->card->sdio_func[i]) {
	530	sdio_remove_func(host->card->sdio_func[i]);
	531	host->card->sdio_func[i] = NULL;
	532	}
	533	}
	534
5c4e6f13 PO	535	mmc_remove_card(host->card);
	536	host->card = NULL;
	537	}
	538
	539	/*
	540	* Card detection callback from host.
	541	*/
	542	static void mmc_sdio_detect(struct mmc_host *host)
	543	{
	544	int err;
	545
	546	BUG_ON(!host);
	547	BUG_ON(!host->card);
	548
87973ba2	549	/* Make sure card is powered before detecting it */
ed919b01 OBC	550	if (host->caps & MMC_CAP_POWER_OFF_CARD) {
	551	err = pm_runtime_get_sync(&host->card->dev);
	552	if (err < 0)
	553	goto out;
	554	}
87973ba2	555
5c4e6f13 PO	556	mmc_claim_host(host);
	557
	558	/*
	559	* Just check if our card has been removed.
	560	*/
	561	err = mmc_select_card(host->card);
	562
	563	mmc_release_host(host);
	564
4d0812c3 OBC	565	/*
	566	* Tell PM core it's OK to power off the card now.
	567	*
	568	* The _sync variant is used in order to ensure that the card
	569	* is left powered off in case an error occurred, and the card
	570	* is going to be removed.
	571	*
	572	* Since there is no specific reason to believe a new user
	573	* is about to show up at this point, the _sync variant is
	574	* desirable anyway.
	575	*/
ed919b01 OBC	576	if (host->caps & MMC_CAP_POWER_OFF_CARD)
ed919b01 OBC	577	pm_runtime_put_sync(&host->card->dev);
4d0812c3	578
87973ba2	579	out:
5c4e6f13 PO	580	if (err) {
	581	mmc_sdio_remove(host);
	582
	583	mmc_claim_host(host);
	584	mmc_detach_bus(host);
	585	mmc_release_host(host);
	586	}
	587	}
	588
17d33e14 NP	589	/*
	590	* SDIO suspend. We need to suspend all functions separately.
	591	* Therefore all registered functions must have drivers with suspend
	592	* and resume methods. Failing that we simply remove the whole card.
	593	*/
95cdfb72	594	static int mmc_sdio_suspend(struct mmc_host *host)
17d33e14	595	{
95cdfb72	596	int i, err = 0;
17d33e14	597
17d33e14 NP	598	for (i = 0; i < host->card->sdio_funcs; i++) {
	599	struct sdio_func *func = host->card->sdio_func[i];
	600	if (func && sdio_func_present(func) && func->dev.driver) {
	601	const struct dev_pm_ops *pmops = func->dev.driver->pm;
	602	if (!pmops \|\| !pmops->suspend \|\| !pmops->resume) {
95cdfb72 NP	603	/* force removal of entire card in that case */
	604	err = -ENOSYS;
	605	} else
	606	err = pmops->suspend(&func->dev);
	607	if (err)
	608	break;
17d33e14 NP	609	}
17d33e14 NP	610	}
95cdfb72	611	while (err && --i >= 0) {
17d33e14 NP	612	struct sdio_func *func = host->card->sdio_func[i];
	613	if (func && sdio_func_present(func) && func->dev.driver) {
	614	const struct dev_pm_ops *pmops = func->dev.driver->pm;
95cdfb72	615	pmops->resume(&func->dev);
17d33e14 NP	616	}
17d33e14 NP	617	}
95cdfb72	618
6b5eda36 DD	619	if (!err && host->pm_flags & MMC_PM_KEEP_POWER) {
	620	mmc_claim_host(host);
	621	sdio_disable_wide(host->card);
	622	mmc_release_host(host);
	623	}
	624
95cdfb72	625	return err;
17d33e14 NP	626	}
17d33e14 NP	627
95cdfb72	628	static int mmc_sdio_resume(struct mmc_host *host)
17d33e14 NP	629	{
	630	int i, err;
	631
	632	BUG_ON(!host);
	633	BUG_ON(!host->card);
	634
95cdfb72	635	/* Basic card reinitialization. */
17d33e14	636	mmc_claim_host(host);
3bca4cf7 CB	637	err = mmc_sdio_init_card(host, host->ocr, host->card,
3bca4cf7 CB	638	(host->pm_flags & MMC_PM_KEEP_POWER));
40216842 NP	639	if (!err && host->sdio_irqs)
40216842 NP	640	mmc_signal_sdio_irq(host);
17d33e14	641	mmc_release_host(host);
17d33e14	642
95cdfb72 NP	643	/*
	644	* If the card looked to be the same as before suspending, then
	645	* we proceed to resume all card functions. If one of them returns
	646	* an error then we simply return that error to the core and the
	647	* card will be redetected as new. It is the responsibility of
	648	* the function driver to perform further tests with the extra
	649	* knowledge it has of the card to confirm the card is indeed the
	650	* same as before suspending (same MAC address for network cards,
	651	* etc.) and return an error otherwise.
	652	*/
	653	for (i = 0; !err && i < host->card->sdio_funcs; i++) {
17d33e14 NP	654	struct sdio_func *func = host->card->sdio_func[i];
	655	if (func && sdio_func_present(func) && func->dev.driver) {
	656	const struct dev_pm_ops *pmops = func->dev.driver->pm;
95cdfb72	657	err = pmops->resume(&func->dev);
17d33e14 NP	658	}
17d33e14 NP	659	}
95cdfb72 NP	660
95cdfb72 NP	661	return err;
17d33e14	662	}
5c4e6f13	663
d3fe37b1 OBC	664	static int mmc_sdio_power_restore(struct mmc_host *host)
	665	{
	666	int ret;
	667
	668	BUG_ON(!host);
	669	BUG_ON(!host->card);
	670
	671	mmc_claim_host(host);
	672	ret = mmc_sdio_init_card(host, host->ocr, host->card,
	673	(host->pm_flags & MMC_PM_KEEP_POWER));
	674	if (!ret && host->sdio_irqs)
	675	mmc_signal_sdio_irq(host);
	676	mmc_release_host(host);
	677
	678	return ret;
	679	}
	680
5c4e6f13 PO	681	static const struct mmc_bus_ops mmc_sdio_ops = {
	682	.remove = mmc_sdio_remove,
	683	.detect = mmc_sdio_detect,
17d33e14 NP	684	.suspend = mmc_sdio_suspend,
17d33e14 NP	685	.resume = mmc_sdio_resume,
d3fe37b1	686	.power_restore = mmc_sdio_power_restore,
5c4e6f13 PO	687	};
	688
	689
	690	/*
	691	* Starting point for SDIO card init.
	692	*/
	693	int mmc_attach_sdio(struct mmc_host *host, u32 ocr)
	694	{
	695	int err;
e29a7d73	696	int i, funcs;
5c4e6f13 PO	697	struct mmc_card *card;
	698
	699	BUG_ON(!host);
d84075c8	700	WARN_ON(!host->claimed);
5c4e6f13 PO	701
	702	mmc_attach_bus(host, &mmc_sdio_ops);
	703
	704	/*
	705	* Sanity check the voltages that the card claims to
	706	* support.
	707	*/
	708	if (ocr & 0x7F) {
	709	printk(KERN_WARNING "%s: card claims to support voltages "
	710	"below the defined range. These will be ignored.\n",
	711	mmc_hostname(host));
	712	ocr &= ~0x7F;
	713	}
	714
5c4e6f13 PO	715	host->ocr = mmc_select_voltage(host, ocr);
	716
	717	/*
	718	* Can we support the voltage(s) of the card(s)?
	719	*/
	720	if (!host->ocr) {
	721	err = -EINVAL;
	722	goto err;
	723	}
	724
	725	/*
17d33e14	726	* Detect and init the card.
5c4e6f13	727	*/
3bca4cf7	728	err = mmc_sdio_init_card(host, host->ocr, NULL, 0);
5c4e6f13 PO	729	if (err)
5c4e6f13 PO	730	goto err;
17d33e14	731	card = host->card;
af517150	732
81968561	733	/*
ed919b01	734	* Enable runtime PM only if supported by host+card+board
81968561	735	*/
ed919b01 OBC	736	if (host->caps & MMC_CAP_POWER_OFF_CARD) {
	737	/*
	738	* Let runtime PM core know our card is active
	739	*/
	740	err = pm_runtime_set_active(&card->dev);
	741	if (err)
	742	goto remove;
81968561	743
ed919b01 OBC	744	/*
	745	* Enable runtime PM for this card
	746	*/
	747	pm_runtime_enable(&card->dev);
	748	}
81968561	749
5c4e6f13 PO	750	/*
	751	* The number of functions on the card is encoded inside
	752	* the ocr.
	753	*/
e8812793 MF	754	funcs = (ocr & 0x70000000) >> 28;
e8812793 MF	755	card->sdio_funcs = 0;
4ff6471c	756
e29a7d73 PO	757	/*
	758	* Initialize (but don't add) all present functions.
	759	*/
e8812793	760	for (i = 0; i < funcs; i++, card->sdio_funcs++) {
e29a7d73 PO	761	err = sdio_init_func(host->card, i + 1);
	762	if (err)
	763	goto remove;
40bba0c1 OBC	764
40bba0c1 OBC	765	/*
ed919b01	766	* Enable Runtime PM for this func (if supported)
40bba0c1	767	*/
ed919b01 OBC	768	if (host->caps & MMC_CAP_POWER_OFF_CARD)
ed919b01 OBC	769	pm_runtime_enable(&card->sdio_func[i]->dev);
e29a7d73	770	}
5c4e6f13 PO	771
	772	mmc_release_host(host);
	773
e29a7d73 PO	774	/*
	775	* First add the card to the driver model...
	776	*/
5c4e6f13 PO	777	err = mmc_add_card(host->card);
5c4e6f13 PO	778	if (err)
e29a7d73 PO	779	goto remove_added;
	780
	781	/*
	782	* ...then the SDIO functions.
	783	*/
	784	for (i = 0;i < funcs;i++) {
	785	err = sdio_add_func(host->card->sdio_func[i]);
	786	if (err)
	787	goto remove_added;
	788	}
5c4e6f13 PO	789
	790	return 0;
	791
e29a7d73 PO	792
	793	remove_added:
	794	/* Remove without lock if the device has been added. */
	795	mmc_sdio_remove(host);
5c4e6f13	796	mmc_claim_host(host);
e29a7d73 PO	797	remove:
	798	/* And with lock if it hasn't been added. */
	799	if (host->card)
	800	mmc_sdio_remove(host);
5c4e6f13 PO	801	err:
	802	mmc_detach_bus(host);
	803	mmc_release_host(host);
	804
	805	printk(KERN_ERR "%s: error %d whilst initialising SDIO card\n",
	806	mmc_hostname(host), err);
	807
	808	return err;
	809	}
	810