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

/*
 *  linux/drivers/mmc/core/mmc.c
 *
 *  Copyright (C) 2003-2004 Russell King, All Rights Reserved.
 *  Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
 *  MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

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

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

#include "core.h"
#include "bus.h"
#include "mmc_ops.h"

static const unsigned int tran_exp[] = {
	10000,		100000,		1000000,	10000000,
	0,		0,		0,		0
};

static const unsigned char tran_mant[] = {
	0,	10,	12,	13,	15,	20,	25,	30,
	35,	40,	45,	50,	55,	60,	70,	80,
};

static const unsigned int tacc_exp[] = {
	1,	10,	100,	1000,	10000,	100000,	1000000, 10000000,
};

static const unsigned int tacc_mant[] = {
	0,	10,	12,	13,	15,	20,	25,	30,
	35,	40,	45,	50,	55,	60,	70,	80,
};

#define UNSTUFF_BITS(resp,start,size)					\
	({								\
		const int __size = size;				\
		const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1;	\
		const int __off = 3 - ((start) / 32);			\
		const int __shft = (start) & 31;			\
		u32 __res;						\
									\
		__res = resp[__off] >> __shft;				\
		if (__size + __shft > 32)				\
			__res |= resp[__off-1] << ((32 - __shft) % 32);	\
		__res & __mask;						\
	})

/*
 * Given the decoded CSD structure, decode the raw CID to our CID structure.
 */
static int mmc_decode_cid(struct mmc_card *card)
{
	u32 *resp = card->raw_cid;

	/*
	 * The selection of the format here is based upon published
	 * specs from sandisk and from what people have reported.
	 */
	switch (card->csd.mmca_vsn) {
	case 0: /* MMC v1.0 - v1.2 */
	case 1: /* MMC v1.4 */
		card->cid.manfid	= UNSTUFF_BITS(resp, 104, 24);
		card->cid.prod_name[0]	= UNSTUFF_BITS(resp, 96, 8);
		card->cid.prod_name[1]	= UNSTUFF_BITS(resp, 88, 8);
		card->cid.prod_name[2]	= UNSTUFF_BITS(resp, 80, 8);
		card->cid.prod_name[3]	= UNSTUFF_BITS(resp, 72, 8);
		card->cid.prod_name[4]	= UNSTUFF_BITS(resp, 64, 8);
		card->cid.prod_name[5]	= UNSTUFF_BITS(resp, 56, 8);
		card->cid.prod_name[6]	= UNSTUFF_BITS(resp, 48, 8);
		card->cid.hwrev		= UNSTUFF_BITS(resp, 44, 4);
		card->cid.fwrev		= UNSTUFF_BITS(resp, 40, 4);
		card->cid.serial	= UNSTUFF_BITS(resp, 16, 24);
		card->cid.month		= UNSTUFF_BITS(resp, 12, 4);
		card->cid.year		= UNSTUFF_BITS(resp, 8, 4) + 1997;
		break;

	case 2: /* MMC v2.0 - v2.2 */
	case 3: /* MMC v3.1 - v3.3 */
	case 4: /* MMC v4 */
		card->cid.manfid	= UNSTUFF_BITS(resp, 120, 8);
		card->cid.oemid		= UNSTUFF_BITS(resp, 104, 16);
		card->cid.prod_name[0]	= UNSTUFF_BITS(resp, 96, 8);
		card->cid.prod_name[1]	= UNSTUFF_BITS(resp, 88, 8);
		card->cid.prod_name[2]	= UNSTUFF_BITS(resp, 80, 8);
		card->cid.prod_name[3]	= UNSTUFF_BITS(resp, 72, 8);
		card->cid.prod_name[4]	= UNSTUFF_BITS(resp, 64, 8);
		card->cid.prod_name[5]	= UNSTUFF_BITS(resp, 56, 8);
		card->cid.serial	= UNSTUFF_BITS(resp, 16, 32);
		card->cid.month		= UNSTUFF_BITS(resp, 12, 4);
		card->cid.year		= UNSTUFF_BITS(resp, 8, 4) + 1997;
		break;

	default:
		printk(KERN_ERR "%s: card has unknown MMCA version %d\n",
			mmc_hostname(card->host), card->csd.mmca_vsn);
		return -EINVAL;
	}

	return 0;
}

/*
 * Given a 128-bit response, decode to our card CSD structure.
 */
static int mmc_decode_csd(struct mmc_card *card)
{
	struct mmc_csd *csd = &card->csd;
	unsigned int e, m;
	u32 *resp = card->raw_csd;

	/*
	 * We only understand CSD structure v1.1 and v1.2.
	 * v1.2 has extra information in bits 15, 11 and 10.
	 * We also support eMMC v4.4 & v4.41.
	 */
	csd->structure = UNSTUFF_BITS(resp, 126, 2);
	if (csd->structure == 0) {
		printk(KERN_ERR "%s: unrecognised CSD structure version %d\n",
			mmc_hostname(card->host), csd->structure);
		return -EINVAL;
	}

	csd->mmca_vsn	 = UNSTUFF_BITS(resp, 122, 4);
	m = UNSTUFF_BITS(resp, 115, 4);
	e = UNSTUFF_BITS(resp, 112, 3);
	csd->tacc_ns	 = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
	csd->tacc_clks	 = UNSTUFF_BITS(resp, 104, 8) * 100;

	m = UNSTUFF_BITS(resp, 99, 4);
	e = UNSTUFF_BITS(resp, 96, 3);
	csd->max_dtr	  = tran_exp[e] * tran_mant[m];
	csd->cmdclass	  = UNSTUFF_BITS(resp, 84, 12);

	e = UNSTUFF_BITS(resp, 47, 3);
	m = UNSTUFF_BITS(resp, 62, 12);
	csd->capacity	  = (1 + m) << (e + 2);

	csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
	csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
	csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
	csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
	csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
	csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
	csd->write_partial = UNSTUFF_BITS(resp, 21, 1);

	return 0;
}

/*
 * Read and decode extended CSD.
 */
static int mmc_read_ext_csd(struct mmc_card *card)
{
	int err;
	u8 *ext_csd;

	BUG_ON(!card);

	if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
		return 0;

	/*
	 * As the ext_csd is so large and mostly unused, we don't store the
	 * raw block in mmc_card.
	 */
	ext_csd = kmalloc(512, GFP_KERNEL);
	if (!ext_csd) {
		printk(KERN_ERR "%s: could not allocate a buffer to "
			"receive the ext_csd.\n", mmc_hostname(card->host));
		return -ENOMEM;
	}

	err = mmc_send_ext_csd(card, ext_csd);
	if (err) {
		/* If the host or the card can't do the switch,
		 * fail more gracefully. */
		if ((err != -EINVAL)
		 && (err != -ENOSYS)
		 && (err != -EFAULT))
			goto out;

		/*
		 * High capacity cards should have this "magic" size
		 * stored in their CSD.
		 */
		if (card->csd.capacity == (4096 * 512)) {
			printk(KERN_ERR "%s: unable to read EXT_CSD "
				"on a possible high capacity card. "
				"Card will be ignored.\n",
				mmc_hostname(card->host));
		} else {
			printk(KERN_WARNING "%s: unable to read "
				"EXT_CSD, performance might "
				"suffer.\n",
				mmc_hostname(card->host));
			err = 0;
		}

		goto out;
	}

	/* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
	if (card->csd.structure == 3) {
		int ext_csd_struct = ext_csd[EXT_CSD_STRUCTURE];
		if (ext_csd_struct > 2) {
			printk(KERN_ERR "%s: unrecognised EXT_CSD structure "
				"version %d\n", mmc_hostname(card->host),
					ext_csd_struct);
			err = -EINVAL;
			goto out;
		}
	}

	card->ext_csd.rev = ext_csd[EXT_CSD_REV];
	if (card->ext_csd.rev > 5) {
		printk(KERN_ERR "%s: unrecognised EXT_CSD revision %d\n",
			mmc_hostname(card->host), card->ext_csd.rev);
		err = -EINVAL;
		goto out;
	}

	if (card->ext_csd.rev >= 2) {
		card->ext_csd.sectors =
			ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
			ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
			ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
			ext_csd[EXT_CSD_SEC_CNT + 3] << 24;

		/* Cards with density > 2GiB are sector addressed */
		if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
			mmc_card_set_blockaddr(card);
	}

	switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) {
	case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26:
		card->ext_csd.hs_max_dtr = 52000000;
		break;
	case EXT_CSD_CARD_TYPE_26:
		card->ext_csd.hs_max_dtr = 26000000;
		break;
	default:
		/* MMC v4 spec says this cannot happen */
		printk(KERN_WARNING "%s: card is mmc v4 but doesn't "
			"support any high-speed modes.\n",
			mmc_hostname(card->host));
	}

	if (card->ext_csd.rev >= 3) {
		u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];

		/* Sleep / awake timeout in 100ns units */
		if (sa_shift > 0 && sa_shift <= 0x17)
			card->ext_csd.sa_timeout =
					1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
	}

out:
	kfree(ext_csd);

	return err;
}

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

static struct attribute *mmc_std_attrs[] = {
	&dev_attr_cid.attr,
	&dev_attr_csd.attr,
	&dev_attr_date.attr,
	&dev_attr_fwrev.attr,
	&dev_attr_hwrev.attr,
	&dev_attr_manfid.attr,
	&dev_attr_name.attr,
	&dev_attr_oemid.attr,
	&dev_attr_serial.attr,
	NULL,
};

static struct attribute_group mmc_std_attr_group = {
	.attrs = mmc_std_attrs,
};

static const struct attribute_group *mmc_attr_groups[] = {
	&mmc_std_attr_group,
	NULL,
};

static struct device_type mmc_type = {
	.groups = mmc_attr_groups,
};

/*
 * 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_init_card(struct mmc_host *host, u32 ocr,
	struct mmc_card *oldcard)
{
	struct mmc_card *card;
	int err;
	u32 cid[4];
	unsigned int max_dtr;

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

	/*
	 * Since we're changing the OCR value, we seem to
	 * need to tell some cards to go back to the idle
	 * state.  We wait 1ms to give cards time to
	 * respond.
	 */
	mmc_go_idle(host);

	/* The extra bit indicates that we support high capacity */
	err = mmc_send_op_cond(host, ocr | (1 << 30), NULL);
	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;
	}

	/*
	 * Fetch CID from card.
	 */
	if (mmc_host_is_spi(host))
		err = mmc_send_cid(host, cid);
	else
		err = mmc_all_send_cid(host, cid);
	if (err)
		goto err;

	if (oldcard) {
		if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
			err = -ENOENT;
			goto err;
		}

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

		card->type = MMC_TYPE_MMC;
		card->rca = 1;
		memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
	}

	/*
	 * For native busses:  set card RCA and quit open drain mode.
	 */
	if (!mmc_host_is_spi(host)) {
		err = mmc_set_relative_addr(card);
		if (err)
			goto free_card;

		mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
	}

	if (!oldcard) {
		/*
		 * Fetch CSD from card.
		 */
		err = mmc_send_csd(card, card->raw_csd);
		if (err)
			goto free_card;

		err = mmc_decode_csd(card);
		if (err)
			goto free_card;
		err = mmc_decode_cid(card);
		if (err)
			goto free_card;
	}

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

	if (!oldcard) {
		/*
		 * Fetch and process extended CSD.
		 */
		err = mmc_read_ext_csd(card);
		if (err)
			goto free_card;
	}

	/*
	 * Activate high speed (if supported)
	 */
	if ((card->ext_csd.hs_max_dtr != 0) &&
		(host->caps & MMC_CAP_MMC_HIGHSPEED)) {
		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
			EXT_CSD_HS_TIMING, 1);
		if (err && err != -EBADMSG)
			goto free_card;

		if (err) {
			printk(KERN_WARNING "%s: switch to highspeed failed\n",
			       mmc_hostname(card->host));
			err = 0;
		} else {
			mmc_card_set_highspeed(card);
			mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
		}
	}

	/*
	 * Compute bus speed.
	 */
	max_dtr = (unsigned int)-1;

	if (mmc_card_highspeed(card)) {
		if (max_dtr > card->ext_csd.hs_max_dtr)
			max_dtr = card->ext_csd.hs_max_dtr;
	} else if (max_dtr > card->csd.max_dtr) {
		max_dtr = card->csd.max_dtr;
	}

	mmc_set_clock(host, max_dtr);

	/*
	 * Activate wide bus (if supported).
	 */
	if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
	    (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
		unsigned ext_csd_bit, bus_width;

		if (host->caps & MMC_CAP_8_BIT_DATA) {
			ext_csd_bit = EXT_CSD_BUS_WIDTH_8;
			bus_width = MMC_BUS_WIDTH_8;
		} else {
			ext_csd_bit = EXT_CSD_BUS_WIDTH_4;
			bus_width = MMC_BUS_WIDTH_4;
		}

		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
				 EXT_CSD_BUS_WIDTH, ext_csd_bit);

		if (err && err != -EBADMSG)
			goto free_card;

		if (err) {
			printk(KERN_WARNING "%s: switch to bus width %d "
			       "failed\n", mmc_hostname(card->host),
			       1 << bus_width);
			err = 0;
		} else {
			mmc_set_bus_width(card->host, bus_width);
		}
	}

	if (!oldcard)
		host->card = card;

	return 0;

free_card:
	if (!oldcard)
		mmc_remove_card(card);
err:

	return err;
}

/*
 * Host is being removed. Free up the current card.
 */
static void mmc_remove(struct mmc_host *host)
{
	BUG_ON(!host);
	BUG_ON(!host->card);

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

/*
 * Card detection callback from host.
 */
static void mmc_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_send_status(host->card, NULL);

	mmc_release_host(host);

	if (err) {
		mmc_remove(host);

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

/*
 * Suspend callback from host.
 */
static int mmc_suspend(struct mmc_host *host)
{
	BUG_ON(!host);
	BUG_ON(!host->card);

	mmc_claim_host(host);
	if (!mmc_host_is_spi(host))
		mmc_deselect_cards(host);
	host->card->state &= ~MMC_STATE_HIGHSPEED;
	mmc_release_host(host);

	return 0;
}

/*
 * Resume callback from host.
 *
 * This function tries to determine if the same card is still present
 * and, if so, restore all state to it.
 */
static int mmc_resume(struct mmc_host *host)
{
	int err;

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

	mmc_claim_host(host);
	err = mmc_init_card(host, host->ocr, host->card);
	mmc_release_host(host);

	return err;
}

static void mmc_power_restore(struct mmc_host *host)
{
	host->card->state &= ~MMC_STATE_HIGHSPEED;
	mmc_claim_host(host);
	mmc_init_card(host, host->ocr, host->card);
	mmc_release_host(host);
}

static int mmc_sleep(struct mmc_host *host)
{
	struct mmc_card *card = host->card;
	int err = -ENOSYS;

	if (card && card->ext_csd.rev >= 3) {
		err = mmc_card_sleepawake(host, 1);
		if (err < 0)
			pr_debug("%s: Error %d while putting card into sleep",
				 mmc_hostname(host), err);
	}

	return err;
}

static int mmc_awake(struct mmc_host *host)
{
	struct mmc_card *card = host->card;
	int err = -ENOSYS;

	if (card && card->ext_csd.rev >= 3) {
		err = mmc_card_sleepawake(host, 0);
		if (err < 0)
			pr_debug("%s: Error %d while awaking sleeping card",
				 mmc_hostname(host), err);
	}

	return err;
}

static const struct mmc_bus_ops mmc_ops = {
	.awake = mmc_awake,
	.sleep = mmc_sleep,
	.remove = mmc_remove,
	.detect = mmc_detect,
	.suspend = NULL,
	.resume = NULL,
	.power_restore = mmc_power_restore,
};

static const struct mmc_bus_ops mmc_ops_unsafe = {
	.awake = mmc_awake,
	.sleep = mmc_sleep,
	.remove = mmc_remove,
	.detect = mmc_detect,
	.suspend = mmc_suspend,
	.resume = mmc_resume,
	.power_restore = mmc_power_restore,
};

static void mmc_attach_bus_ops(struct mmc_host *host)
{
	const struct mmc_bus_ops *bus_ops;

	if (host->caps & MMC_CAP_NONREMOVABLE || !mmc_assume_removable)
		bus_ops = &mmc_ops_unsafe;
	else
		bus_ops = &mmc_ops;
	mmc_attach_bus(host, bus_ops);
}

/*
 * Starting point for MMC card init.
 */
int mmc_attach_mmc(struct mmc_host *host, u32 ocr)
{
	int err;

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

	mmc_attach_bus_ops(host);

	/*
	 * We need to get OCR a different way for SPI.
	 */
	if (mmc_host_is_spi(host)) {
		err = mmc_spi_read_ocr(host, 1, &ocr);
		if (err)
			goto err;
	}

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

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

	mmc_release_host(host);

	err = mmc_add_card(host->card);
	if (err)
		goto remove_card;

	return 0;

remove_card:
	mmc_remove_card(host->card);
	host->card = NULL;
	mmc_claim_host(host);
err:
	mmc_detach_bus(host);
	mmc_release_host(host);

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

	return err;
}
Commit	Line	Data
7ea239d9	1	/*
70f10482	2	* linux/drivers/mmc/core/mmc.c
7ea239d9 PO	3	*
	4	* Copyright (C) 2003-2004 Russell King, All Rights Reserved.
	5	* Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
	6	* MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
	13	#include <linux/err.h>
5a0e3ad6	14	#include <linux/slab.h>
7ea239d9 PO	15
	16	#include <linux/mmc/host.h>
	17	#include <linux/mmc/card.h>
	18	#include <linux/mmc/mmc.h>
	19
	20	#include "core.h"
4101c16a	21	#include "bus.h"
7ea239d9 PO	22	#include "mmc_ops.h"
	23
	24	static const unsigned int tran_exp[] = {
	25	10000, 100000, 1000000, 10000000,
	26	0, 0, 0, 0
	27	};
	28
	29	static const unsigned char tran_mant[] = {
	30	0, 10, 12, 13, 15, 20, 25, 30,
	31	35, 40, 45, 50, 55, 60, 70, 80,
	32	};
	33
	34	static const unsigned int tacc_exp[] = {
	35	1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
	36	};
	37
	38	static const unsigned int tacc_mant[] = {
	39	0, 10, 12, 13, 15, 20, 25, 30,
	40	35, 40, 45, 50, 55, 60, 70, 80,
	41	};
	42
	43	#define UNSTUFF_BITS(resp,start,size) \
	44	({ \
	45	const int __size = size; \
	46	const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
	47	const int __off = 3 - ((start) / 32); \
	48	const int __shft = (start) & 31; \
	49	u32 __res; \
	50	\
	51	__res = resp[__off] >> __shft; \
	52	if (__size + __shft > 32) \
	53	__res \|= resp[__off-1] << ((32 - __shft) % 32); \
	54	__res & __mask; \
	55	})
	56
	57	/*
	58	* Given the decoded CSD structure, decode the raw CID to our CID structure.
	59	*/
bd766312	60	static int mmc_decode_cid(struct mmc_card *card)
7ea239d9 PO	61	{
	62	u32 *resp = card->raw_cid;
	63
	64	/*
	65	* The selection of the format here is based upon published
	66	* specs from sandisk and from what people have reported.
	67	*/
	68	switch (card->csd.mmca_vsn) {
	69	case 0: /* MMC v1.0 - v1.2 */
	70	case 1: /* MMC v1.4 */
	71	card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
	72	card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
	73	card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
	74	card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
	75	card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
	76	card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
	77	card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
	78	card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
	79	card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
	80	card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
	81	card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
	82	card->cid.month = UNSTUFF_BITS(resp, 12, 4);
	83	card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
	84	break;
	85
	86	case 2: /* MMC v2.0 - v2.2 */
	87	case 3: /* MMC v3.1 - v3.3 */
	88	case 4: /* MMC v4 */
	89	card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
	90	card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
	91	card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
	92	card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
	93	card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
	94	card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
	95	card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
	96	card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
	97	card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
	98	card->cid.month = UNSTUFF_BITS(resp, 12, 4);
	99	card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
	100	break;
	101
	102	default:
facba917	103	printk(KERN_ERR "%s: card has unknown MMCA version %d\n",
7ea239d9	104	mmc_hostname(card->host), card->csd.mmca_vsn);
bd766312	105	return -EINVAL;
7ea239d9	106	}
bd766312 PO	107
bd766312 PO	108	return 0;
7ea239d9 PO	109	}
	110
	111	/*
	112	* Given a 128-bit response, decode to our card CSD structure.
	113	*/
bd766312	114	static int mmc_decode_csd(struct mmc_card *card)
7ea239d9 PO	115	{
7ea239d9 PO	116	struct mmc_csd *csd = &card->csd;
6da24b78	117	unsigned int e, m;
7ea239d9 PO	118	u32 *resp = card->raw_csd;
	119
	120	/*
	121	* We only understand CSD structure v1.1 and v1.2.
	122	* v1.2 has extra information in bits 15, 11 and 10.
6da24b78	123	* We also support eMMC v4.4 & v4.41.
7ea239d9	124	*/
6da24b78 KP	125	csd->structure = UNSTUFF_BITS(resp, 126, 2);
6da24b78 KP	126	if (csd->structure == 0) {
facba917	127	printk(KERN_ERR "%s: unrecognised CSD structure version %d\n",
6da24b78	128	mmc_hostname(card->host), csd->structure);
bd766312	129	return -EINVAL;
7ea239d9 PO	130	}
	131
	132	csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
	133	m = UNSTUFF_BITS(resp, 115, 4);
	134	e = UNSTUFF_BITS(resp, 112, 3);
	135	csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
	136	csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
	137
	138	m = UNSTUFF_BITS(resp, 99, 4);
	139	e = UNSTUFF_BITS(resp, 96, 3);
	140	csd->max_dtr = tran_exp[e] * tran_mant[m];
	141	csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
	142
	143	e = UNSTUFF_BITS(resp, 47, 3);
	144	m = UNSTUFF_BITS(resp, 62, 12);
	145	csd->capacity = (1 + m) << (e + 2);
	146
	147	csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
	148	csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
	149	csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
	150	csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
	151	csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
	152	csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
	153	csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
bd766312 PO	154
bd766312 PO	155	return 0;
7ea239d9 PO	156	}
	157
	158	/*
89a73cf5	159	* Read and decode extended CSD.
7ea239d9	160	*/
89a73cf5	161	static int mmc_read_ext_csd(struct mmc_card *card)
7ea239d9 PO	162	{
	163	int err;
	164	u8 *ext_csd;
	165
	166	BUG_ON(!card);
	167
7ea239d9	168	if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
17b0429d	169	return 0;
7ea239d9 PO	170
	171	/*
	172	* As the ext_csd is so large and mostly unused, we don't store the
	173	* raw block in mmc_card.
	174	*/
	175	ext_csd = kmalloc(512, GFP_KERNEL);
	176	if (!ext_csd) {
	177	printk(KERN_ERR "%s: could not allocate a buffer to "
adf66a0d	178	"receive the ext_csd.\n", mmc_hostname(card->host));
17b0429d	179	return -ENOMEM;
7ea239d9 PO	180	}
	181
	182	err = mmc_send_ext_csd(card, ext_csd);
17b0429d	183	if (err) {
d08ebedd WM	184	/* If the host or the card can't do the switch,
	185	* fail more gracefully. */
	186	if ((err != -EINVAL)
	187	&& (err != -ENOSYS)
	188	&& (err != -EFAULT))
adf66a0d PO	189	goto out;
adf66a0d PO	190
7ea239d9 PO	191	/*
	192	* High capacity cards should have this "magic" size
	193	* stored in their CSD.
	194	*/
	195	if (card->csd.capacity == (4096 * 512)) {
	196	printk(KERN_ERR "%s: unable to read EXT_CSD "
	197	"on a possible high capacity card. "
	198	"Card will be ignored.\n",
	199	mmc_hostname(card->host));
	200	} else {
	201	printk(KERN_WARNING "%s: unable to read "
	202	"EXT_CSD, performance might "
	203	"suffer.\n",
	204	mmc_hostname(card->host));
17b0429d	205	err = 0;
7ea239d9	206	}
adf66a0d	207
7ea239d9 PO	208	goto out;
	209	}
	210
6da24b78 KP	211	/* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
	212	if (card->csd.structure == 3) {
	213	int ext_csd_struct = ext_csd[EXT_CSD_STRUCTURE];
	214	if (ext_csd_struct > 2) {
	215	printk(KERN_ERR "%s: unrecognised EXT_CSD structure "
	216	"version %d\n", mmc_hostname(card->host),
	217	ext_csd_struct);
	218	err = -EINVAL;
	219	goto out;
	220	}
	221	}
	222
b1ebe384	223	card->ext_csd.rev = ext_csd[EXT_CSD_REV];
11723ab1	224	if (card->ext_csd.rev > 5) {
6da24b78 KP	225	printk(KERN_ERR "%s: unrecognised EXT_CSD revision %d\n",
6da24b78 KP	226	mmc_hostname(card->host), card->ext_csd.rev);
00cedfa6 FM	227	err = -EINVAL;
00cedfa6 FM	228	goto out;
d7604d76 PO	229	}
d7604d76 PO	230
b1ebe384	231	if (card->ext_csd.rev >= 2) {
d7604d76 PO	232	card->ext_csd.sectors =
	233	ext_csd[EXT_CSD_SEC_CNT + 0] << 0 \|
	234	ext_csd[EXT_CSD_SEC_CNT + 1] << 8 \|
	235	ext_csd[EXT_CSD_SEC_CNT + 2] << 16 \|
	236	ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
fc8a0985 HP	237
	238	/* Cards with density > 2GiB are sector addressed */
	239	if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
d7604d76 PO	240	mmc_card_set_blockaddr(card);
d7604d76 PO	241	}
7ea239d9	242
7198f3c9	243	switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) {
7ea239d9 PO	244	case EXT_CSD_CARD_TYPE_52 \| EXT_CSD_CARD_TYPE_26:
	245	card->ext_csd.hs_max_dtr = 52000000;
	246	break;
	247	case EXT_CSD_CARD_TYPE_26:
	248	card->ext_csd.hs_max_dtr = 26000000;
	249	break;
	250	default:
	251	/* MMC v4 spec says this cannot happen */
	252	printk(KERN_WARNING "%s: card is mmc v4 but doesn't "
	253	"support any high-speed modes.\n",
	254	mmc_hostname(card->host));
7ea239d9 PO	255	}
7ea239d9 PO	256
b1ebe384 JL	257	if (card->ext_csd.rev >= 3) {
	258	u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
	259
	260	/* Sleep / awake timeout in 100ns units */
	261	if (sa_shift > 0 && sa_shift <= 0x17)
	262	card->ext_csd.sa_timeout =
	263	1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
	264	}
	265
7ea239d9 PO	266	out:
	267	kfree(ext_csd);
	268
	269	return err;
	270	}
	271
51ec92e2 PO	272	MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
	273	card->raw_cid[2], card->raw_cid[3]);
	274	MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
	275	card->raw_csd[2], card->raw_csd[3]);
	276	MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
	277	MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
	278	MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
	279	MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
	280	MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
	281	MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
	282	MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
	283
	284	static struct attribute *mmc_std_attrs[] = {
	285	&dev_attr_cid.attr,
	286	&dev_attr_csd.attr,
	287	&dev_attr_date.attr,
	288	&dev_attr_fwrev.attr,
	289	&dev_attr_hwrev.attr,
	290	&dev_attr_manfid.attr,
	291	&dev_attr_name.attr,
	292	&dev_attr_oemid.attr,
	293	&dev_attr_serial.attr,
	294	NULL,
	295	};
	296
	297	static struct attribute_group mmc_std_attr_group = {
	298	.attrs = mmc_std_attrs,
	299	};
	300
a4dbd674	301	static const struct attribute_group *mmc_attr_groups[] = {
51ec92e2 PO	302	&mmc_std_attr_group,
	303	NULL,
	304	};
	305
	306	static struct device_type mmc_type = {
	307	.groups = mmc_attr_groups,
	308	};
	309
7ea239d9	310	/*
6abaa0c9 PO	311	* Handle the detection and initialisation of a card.
6abaa0c9 PO	312	*
8769392b	313	* In the case of a resume, "oldcard" will contain the card
6abaa0c9	314	* we're trying to reinitialise.
7ea239d9	315	*/
8c75deae	316	static int mmc_init_card(struct mmc_host *host, u32 ocr,
6abaa0c9	317	struct mmc_card *oldcard)
7ea239d9 PO	318	{
	319	struct mmc_card *card;
	320	int err;
	321	u32 cid[4];
	322	unsigned int max_dtr;
	323
	324	BUG_ON(!host);
d84075c8	325	WARN_ON(!host->claimed);
7ea239d9	326
7ea239d9 PO	327	/*
	328	* Since we're changing the OCR value, we seem to
	329	* need to tell some cards to go back to the idle
	330	* state. We wait 1ms to give cards time to
	331	* respond.
	332	*/
	333	mmc_go_idle(host);
	334
	335	/* The extra bit indicates that we support high capacity */
6abaa0c9	336	err = mmc_send_op_cond(host, ocr \| (1 << 30), NULL);
17b0429d	337	if (err)
6abaa0c9	338	goto err;
7ea239d9	339
af517150 DB	340	/*
	341	* For SPI, enable CRC as appropriate.
	342	*/
	343	if (mmc_host_is_spi(host)) {
	344	err = mmc_spi_set_crc(host, use_spi_crc);
	345	if (err)
	346	goto err;
	347	}
	348
7ea239d9 PO	349	/*
	350	* Fetch CID from card.
	351	*/
af517150 DB	352	if (mmc_host_is_spi(host))
	353	err = mmc_send_cid(host, cid);
	354	else
	355	err = mmc_all_send_cid(host, cid);
17b0429d	356	if (err)
7ea239d9 PO	357	goto err;
7ea239d9 PO	358
6abaa0c9	359	if (oldcard) {
adf66a0d PO	360	if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
adf66a0d PO	361	err = -ENOENT;
6abaa0c9	362	goto err;
adf66a0d	363	}
6abaa0c9 PO	364
	365	card = oldcard;
	366	} else {
	367	/*
	368	* Allocate card structure.
	369	*/
51ec92e2	370	card = mmc_alloc_card(host, &mmc_type);
adf66a0d PO	371	if (IS_ERR(card)) {
adf66a0d PO	372	err = PTR_ERR(card);
6abaa0c9	373	goto err;
adf66a0d	374	}
7ea239d9	375
6abaa0c9 PO	376	card->type = MMC_TYPE_MMC;
	377	card->rca = 1;
	378	memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
	379	}
7ea239d9 PO	380
7ea239d9 PO	381	/*
af517150	382	* For native busses: set card RCA and quit open drain mode.
7ea239d9	383	*/
af517150 DB	384	if (!mmc_host_is_spi(host)) {
	385	err = mmc_set_relative_addr(card);
	386	if (err)
	387	goto free_card;
7ea239d9	388
af517150 DB	389	mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
af517150 DB	390	}
7ea239d9	391
6abaa0c9 PO	392	if (!oldcard) {
	393	/*
	394	* Fetch CSD from card.
	395	*/
	396	err = mmc_send_csd(card, card->raw_csd);
17b0429d	397	if (err)
6abaa0c9	398	goto free_card;
7ea239d9	399
bd766312	400	err = mmc_decode_csd(card);
adf66a0d	401	if (err)
bd766312 PO	402	goto free_card;
bd766312 PO	403	err = mmc_decode_cid(card);
adf66a0d	404	if (err)
bd766312	405	goto free_card;
6abaa0c9	406	}
7ea239d9 PO	407
7ea239d9 PO	408	/*
89a73cf5	409	* Select card, as all following commands rely on that.
7ea239d9	410	*/
af517150 DB	411	if (!mmc_host_is_spi(host)) {
	412	err = mmc_select_card(card);
	413	if (err)
	414	goto free_card;
	415	}
7ea239d9	416
6abaa0c9 PO	417	if (!oldcard) {
6abaa0c9 PO	418	/*
af517150	419	* Fetch and process extended CSD.
6abaa0c9 PO	420	*/
6abaa0c9 PO	421	err = mmc_read_ext_csd(card);
17b0429d	422	if (err)
6abaa0c9 PO	423	goto free_card;
6abaa0c9 PO	424	}
7ea239d9	425
89a73cf5 PO	426	/*
	427	* Activate high speed (if supported)
	428	*/
	429	if ((card->ext_csd.hs_max_dtr != 0) &&
	430	(host->caps & MMC_CAP_MMC_HIGHSPEED)) {
	431	err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
	432	EXT_CSD_HS_TIMING, 1);
ef0b27d4	433	if (err && err != -EBADMSG)
89a73cf5 PO	434	goto free_card;
89a73cf5 PO	435
ef0b27d4 AH	436	if (err) {
	437	printk(KERN_WARNING "%s: switch to highspeed failed\n",
	438	mmc_hostname(card->host));
	439	err = 0;
	440	} else {
	441	mmc_card_set_highspeed(card);
	442	mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
	443	}
89a73cf5 PO	444	}
89a73cf5 PO	445
7ea239d9 PO	446	/*
	447	* Compute bus speed.
	448	*/
	449	max_dtr = (unsigned int)-1;
	450
	451	if (mmc_card_highspeed(card)) {
	452	if (max_dtr > card->ext_csd.hs_max_dtr)
	453	max_dtr = card->ext_csd.hs_max_dtr;
	454	} else if (max_dtr > card->csd.max_dtr) {
	455	max_dtr = card->csd.max_dtr;
	456	}
	457
	458	mmc_set_clock(host, max_dtr);
	459
89a73cf5 PO	460	/*
	461	* Activate wide bus (if supported).
	462	*/
	463	if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
b30f8af3 JL	464	(host->caps & (MMC_CAP_4_BIT_DATA \| MMC_CAP_8_BIT_DATA))) {
	465	unsigned ext_csd_bit, bus_width;
	466
	467	if (host->caps & MMC_CAP_8_BIT_DATA) {
	468	ext_csd_bit = EXT_CSD_BUS_WIDTH_8;
	469	bus_width = MMC_BUS_WIDTH_8;
	470	} else {
	471	ext_csd_bit = EXT_CSD_BUS_WIDTH_4;
	472	bus_width = MMC_BUS_WIDTH_4;
	473	}
	474
89a73cf5	475	err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
b30f8af3 JL	476	EXT_CSD_BUS_WIDTH, ext_csd_bit);
b30f8af3 JL	477
ef0b27d4	478	if (err && err != -EBADMSG)
89a73cf5 PO	479	goto free_card;
89a73cf5 PO	480
ef0b27d4 AH	481	if (err) {
	482	printk(KERN_WARNING "%s: switch to bus width %d "
	483	"failed\n", mmc_hostname(card->host),
	484	1 << bus_width);
	485	err = 0;
	486	} else {
	487	mmc_set_bus_width(card->host, bus_width);
	488	}
89a73cf5 PO	489	}
89a73cf5 PO	490
6abaa0c9 PO	491	if (!oldcard)
	492	host->card = card;
	493
17b0429d	494	return 0;
6abaa0c9 PO	495
	496	free_card:
	497	if (!oldcard)
	498	mmc_remove_card(card);
	499	err:
	500
adf66a0d	501	return err;
6abaa0c9 PO	502	}
	503
	504	/*
	505	* Host is being removed. Free up the current card.
	506	*/
	507	static void mmc_remove(struct mmc_host *host)
	508	{
	509	BUG_ON(!host);
	510	BUG_ON(!host->card);
	511
	512	mmc_remove_card(host->card);
	513	host->card = NULL;
	514	}
	515
	516	/*
	517	* Card detection callback from host.
	518	*/
	519	static void mmc_detect(struct mmc_host *host)
	520	{
	521	int err;
	522
	523	BUG_ON(!host);
	524	BUG_ON(!host->card);
	525
	526	mmc_claim_host(host);
	527
	528	/*
	529	* Just check if our card has been removed.
	530	*/
	531	err = mmc_send_status(host->card, NULL);
	532
	533	mmc_release_host(host);
	534
17b0429d	535	if (err) {
4101c16a	536	mmc_remove(host);
6abaa0c9 PO	537
	538	mmc_claim_host(host);
	539	mmc_detach_bus(host);
	540	mmc_release_host(host);
	541	}
	542	}
	543
6abaa0c9 PO	544	/*
	545	* Suspend callback from host.
	546	*/
95cdfb72	547	static int mmc_suspend(struct mmc_host *host)
6abaa0c9 PO	548	{
	549	BUG_ON(!host);
	550	BUG_ON(!host->card);
7ea239d9	551
6abaa0c9	552	mmc_claim_host(host);
af517150 DB	553	if (!mmc_host_is_spi(host))
af517150 DB	554	mmc_deselect_cards(host);
6abaa0c9	555	host->card->state &= ~MMC_STATE_HIGHSPEED;
7ea239d9	556	mmc_release_host(host);
95cdfb72 NP	557
95cdfb72 NP	558	return 0;
6abaa0c9	559	}
7ea239d9	560
6abaa0c9 PO	561	/*
	562	* Resume callback from host.
	563	*
	564	* This function tries to determine if the same card is still present
	565	* and, if so, restore all state to it.
	566	*/
95cdfb72	567	static int mmc_resume(struct mmc_host *host)
6abaa0c9 PO	568	{
	569	int err;
	570
	571	BUG_ON(!host);
	572	BUG_ON(!host->card);
	573
	574	mmc_claim_host(host);
8c75deae	575	err = mmc_init_card(host, host->ocr, host->card);
2986d0bf PO	576	mmc_release_host(host);
2986d0bf PO	577
95cdfb72	578	return err;
6abaa0c9 PO	579	}
6abaa0c9 PO	580
eae1aeee AH	581	static void mmc_power_restore(struct mmc_host *host)
	582	{
	583	host->card->state &= ~MMC_STATE_HIGHSPEED;
	584	mmc_claim_host(host);
	585	mmc_init_card(host, host->ocr, host->card);
	586	mmc_release_host(host);
	587	}
	588
b1ebe384 JL	589	static int mmc_sleep(struct mmc_host *host)
	590	{
	591	struct mmc_card *card = host->card;
	592	int err = -ENOSYS;
	593
	594	if (card && card->ext_csd.rev >= 3) {
	595	err = mmc_card_sleepawake(host, 1);
	596	if (err < 0)
	597	pr_debug("%s: Error %d while putting card into sleep",
	598	mmc_hostname(host), err);
	599	}
	600
	601	return err;
	602	}
	603
	604	static int mmc_awake(struct mmc_host *host)
	605	{
	606	struct mmc_card *card = host->card;
	607	int err = -ENOSYS;
	608
	609	if (card && card->ext_csd.rev >= 3) {
	610	err = mmc_card_sleepawake(host, 0);
	611	if (err < 0)
	612	pr_debug("%s: Error %d while awaking sleeping card",
	613	mmc_hostname(host), err);
	614	}
	615
	616	return err;
	617	}
	618
6abaa0c9	619	static const struct mmc_bus_ops mmc_ops = {
b1ebe384 JL	620	.awake = mmc_awake,
b1ebe384 JL	621	.sleep = mmc_sleep,
9feae246 AH	622	.remove = mmc_remove,
	623	.detect = mmc_detect,
	624	.suspend = NULL,
	625	.resume = NULL,
eae1aeee	626	.power_restore = mmc_power_restore,
9feae246 AH	627	};
	628
	629	static const struct mmc_bus_ops mmc_ops_unsafe = {
b1ebe384 JL	630	.awake = mmc_awake,
b1ebe384 JL	631	.sleep = mmc_sleep,
6abaa0c9 PO	632	.remove = mmc_remove,
	633	.detect = mmc_detect,
	634	.suspend = mmc_suspend,
	635	.resume = mmc_resume,
eae1aeee	636	.power_restore = mmc_power_restore,
6abaa0c9 PO	637	};
6abaa0c9 PO	638
9feae246 AH	639	static void mmc_attach_bus_ops(struct mmc_host *host)
	640	{
	641	const struct mmc_bus_ops *bus_ops;
	642
bd68e083	643	if (host->caps & MMC_CAP_NONREMOVABLE \|\| !mmc_assume_removable)
9feae246 AH	644	bus_ops = &mmc_ops_unsafe;
	645	else
	646	bus_ops = &mmc_ops;
	647	mmc_attach_bus(host, bus_ops);
	648	}
	649
6abaa0c9 PO	650	/*
	651	* Starting point for MMC card init.
	652	*/
	653	int mmc_attach_mmc(struct mmc_host *host, u32 ocr)
	654	{
	655	int err;
	656
	657	BUG_ON(!host);
d84075c8	658	WARN_ON(!host->claimed);
6abaa0c9	659
9feae246	660	mmc_attach_bus_ops(host);
6abaa0c9	661
af517150 DB	662	/*
	663	* We need to get OCR a different way for SPI.
	664	*/
	665	if (mmc_host_is_spi(host)) {
	666	err = mmc_spi_read_ocr(host, 1, &ocr);
	667	if (err)
	668	goto err;
	669	}
	670
6abaa0c9 PO	671	/*
	672	* Sanity check the voltages that the card claims to
	673	* support.
	674	*/
	675	if (ocr & 0x7F) {
	676	printk(KERN_WARNING "%s: card claims to support voltages "
	677	"below the defined range. These will be ignored.\n",
	678	mmc_hostname(host));
	679	ocr &= ~0x7F;
	680	}
	681
	682	host->ocr = mmc_select_voltage(host, ocr);
	683
	684	/*
	685	* Can we support the voltage of the card?
	686	*/
109b5bed PO	687	if (!host->ocr) {
109b5bed PO	688	err = -EINVAL;
6abaa0c9	689	goto err;
109b5bed	690	}
6abaa0c9 PO	691
	692	/*
	693	* Detect and init the card.
	694	*/
8c75deae	695	err = mmc_init_card(host, host->ocr, NULL);
17b0429d	696	if (err)
6abaa0c9 PO	697	goto err;
	698
	699	mmc_release_host(host);
	700
4101c16a	701	err = mmc_add_card(host->card);
7ea239d9	702	if (err)
2986d0bf	703	goto remove_card;
7ea239d9 PO	704
	705	return 0;
	706
2986d0bf	707	remove_card:
6abaa0c9	708	mmc_remove_card(host->card);
7ea239d9	709	host->card = NULL;
2986d0bf	710	mmc_claim_host(host);
7ea239d9 PO	711	err:
	712	mmc_detach_bus(host);
	713	mmc_release_host(host);
	714
109b5bed PO	715	printk(KERN_ERR "%s: error %d whilst initialising MMC card\n",
	716	mmc_hostname(host), err);
	717
adf66a0d	718	return err;
7ea239d9	719	}