[linux-block.git] / drivers / mmc / core / sd_ops.c

/*
 *  linux/drivers/mmc/core/sd_ops.h
 *
 *  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/slab.h>
#include <linux/types.h>
#include <linux/export.h>
#include <linux/scatterlist.h>

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

#include "core.h"
#include "sd_ops.h"

int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
{
	int err;
	struct mmc_command cmd = {};

	if (WARN_ON(card && card->host != host))
		return -EINVAL;

	cmd.opcode = MMC_APP_CMD;

	if (card) {
		cmd.arg = card->rca << 16;
		cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
	} else {
		cmd.arg = 0;
		cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_BCR;
	}

	err = mmc_wait_for_cmd(host, &cmd, 0);
	if (err)
		return err;

	/* Check that card supported application commands */
	if (!mmc_host_is_spi(host) && !(cmd.resp[0] & R1_APP_CMD))
		return -EOPNOTSUPP;

	return 0;
}
EXPORT_SYMBOL_GPL(mmc_app_cmd);

/**
 *	mmc_wait_for_app_cmd - start an application command and wait for
 			       completion
 *	@host: MMC host to start command
 *	@card: Card to send MMC_APP_CMD to
 *	@cmd: MMC command to start
 *	@retries: maximum number of retries
 *
 *	Sends a MMC_APP_CMD, checks the card response, sends the command
 *	in the parameter and waits for it to complete. Return any error
 *	that occurred while the command was executing.  Do not attempt to
 *	parse the response.
 */
int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card,
	struct mmc_command *cmd, int retries)
{
	struct mmc_request mrq = {};

	int i, err;

	if (retries < 0)
		retries = MMC_CMD_RETRIES;

	err = -EIO;

	/*
	 * We have to resend MMC_APP_CMD for each attempt so
	 * we cannot use the retries field in mmc_command.
	 */
	for (i = 0;i <= retries;i++) {
		err = mmc_app_cmd(host, card);
		if (err) {
			/* no point in retrying; no APP commands allowed */
			if (mmc_host_is_spi(host)) {
				if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
					break;
			}
			continue;
		}

		memset(&mrq, 0, sizeof(struct mmc_request));

		memset(cmd->resp, 0, sizeof(cmd->resp));
		cmd->retries = 0;

		mrq.cmd = cmd;
		cmd->data = NULL;

		mmc_wait_for_req(host, &mrq);

		err = cmd->error;
		if (!cmd->error)
			break;

		/* no point in retrying illegal APP commands */
		if (mmc_host_is_spi(host)) {
			if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
				break;
		}
	}

	return err;
}

EXPORT_SYMBOL(mmc_wait_for_app_cmd);

int mmc_app_set_bus_width(struct mmc_card *card, int width)
{
	struct mmc_command cmd = {};

	cmd.opcode = SD_APP_SET_BUS_WIDTH;
	cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;

	switch (width) {
	case MMC_BUS_WIDTH_1:
		cmd.arg = SD_BUS_WIDTH_1;
		break;
	case MMC_BUS_WIDTH_4:
		cmd.arg = SD_BUS_WIDTH_4;
		break;
	default:
		return -EINVAL;
	}

	return mmc_wait_for_app_cmd(card->host, card, &cmd, MMC_CMD_RETRIES);
}

int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
{
	struct mmc_command cmd = {};
	int i, err = 0;

	cmd.opcode = SD_APP_OP_COND;
	if (mmc_host_is_spi(host))
		cmd.arg = ocr & (1 << 30); /* SPI only defines one bit */
	else
		cmd.arg = ocr;
	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;

	for (i = 100; i; i--) {
		err = mmc_wait_for_app_cmd(host, NULL, &cmd, MMC_CMD_RETRIES);
		if (err)
			break;

		/* if we're just probing, do a single pass */
		if (ocr == 0)
			break;

		/* otherwise wait until reset completes */
		if (mmc_host_is_spi(host)) {
			if (!(cmd.resp[0] & R1_SPI_IDLE))
				break;
		} else {
			if (cmd.resp[0] & MMC_CARD_BUSY)
				break;
		}

		err = -ETIMEDOUT;

		mmc_delay(10);
	}

	if (!i)
		pr_err("%s: card never left busy state\n", mmc_hostname(host));

	if (rocr && !mmc_host_is_spi(host))
		*rocr = cmd.resp[0];

	return err;
}

int mmc_send_if_cond(struct mmc_host *host, u32 ocr)
{
	struct mmc_command cmd = {};
	int err;
	static const u8 test_pattern = 0xAA;
	u8 result_pattern;

	/*
	 * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
	 * before SD_APP_OP_COND. This command will harmlessly fail for
	 * SD 1.0 cards.
	 */
	cmd.opcode = SD_SEND_IF_COND;
	cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern;
	cmd.flags = MMC_RSP_SPI_R7 | MMC_RSP_R7 | MMC_CMD_BCR;

	err = mmc_wait_for_cmd(host, &cmd, 0);
	if (err)
		return err;

	if (mmc_host_is_spi(host))
		result_pattern = cmd.resp[1] & 0xFF;
	else
		result_pattern = cmd.resp[0] & 0xFF;

	if (result_pattern != test_pattern)
		return -EIO;

	return 0;
}

int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca)
{
	int err;
	struct mmc_command cmd = {};

	cmd.opcode = SD_SEND_RELATIVE_ADDR;
	cmd.arg = 0;
	cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;

	err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
	if (err)
		return err;

	*rca = cmd.resp[0] >> 16;

	return 0;
}

int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
{
	int err;
	struct mmc_request mrq = {};
	struct mmc_command cmd = {};
	struct mmc_data data = {};
	struct scatterlist sg;
	void *data_buf;

	/* NOTE: caller guarantees scr is heap-allocated */

	err = mmc_app_cmd(card->host, card);
	if (err)
		return err;

	/* dma onto stack is unsafe/nonportable, but callers to this
	 * routine normally provide temporary on-stack buffers ...
	 */
	data_buf = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
	if (data_buf == NULL)
		return -ENOMEM;

	mrq.cmd = &cmd;
	mrq.data = &data;

	cmd.opcode = SD_APP_SEND_SCR;
	cmd.arg = 0;
	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;

	data.blksz = 8;
	data.blocks = 1;
	data.flags = MMC_DATA_READ;
	data.sg = &sg;
	data.sg_len = 1;

	sg_init_one(&sg, data_buf, 8);

	mmc_set_data_timeout(&data, card);

	mmc_wait_for_req(card->host, &mrq);

	memcpy(scr, data_buf, sizeof(card->raw_scr));
	kfree(data_buf);

	if (cmd.error)
		return cmd.error;
	if (data.error)
		return data.error;

	scr[0] = be32_to_cpu(scr[0]);
	scr[1] = be32_to_cpu(scr[1]);

	return 0;
}

int mmc_sd_switch(struct mmc_card *card, int mode, int group,
	u8 value, u8 *resp)
{
	struct mmc_request mrq = {};
	struct mmc_command cmd = {};
	struct mmc_data data = {};
	struct scatterlist sg;

	/* NOTE: caller guarantees resp is heap-allocated */

	mode = !!mode;
	value &= 0xF;

	mrq.cmd = &cmd;
	mrq.data = &data;

	cmd.opcode = SD_SWITCH;
	cmd.arg = mode << 31 | 0x00FFFFFF;
	cmd.arg &= ~(0xF << (group * 4));
	cmd.arg |= value << (group * 4);
	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;

	data.blksz = 64;
	data.blocks = 1;
	data.flags = MMC_DATA_READ;
	data.sg = &sg;
	data.sg_len = 1;

	sg_init_one(&sg, resp, 64);

	mmc_set_data_timeout(&data, card);

	mmc_wait_for_req(card->host, &mrq);

	if (cmd.error)
		return cmd.error;
	if (data.error)
		return data.error;

	return 0;
}

int mmc_app_sd_status(struct mmc_card *card, void *ssr)
{
	int err;
	struct mmc_request mrq = {};
	struct mmc_command cmd = {};
	struct mmc_data data = {};
	struct scatterlist sg;

	/* NOTE: caller guarantees ssr is heap-allocated */

	err = mmc_app_cmd(card->host, card);
	if (err)
		return err;

	mrq.cmd = &cmd;
	mrq.data = &data;

	cmd.opcode = SD_APP_SD_STATUS;
	cmd.arg = 0;
	cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_ADTC;

	data.blksz = 64;
	data.blocks = 1;
	data.flags = MMC_DATA_READ;
	data.sg = &sg;
	data.sg_len = 1;

	sg_init_one(&sg, ssr, 64);

	mmc_set_data_timeout(&data, card);

	mmc_wait_for_req(card->host, &mrq);

	if (cmd.error)
		return cmd.error;
	if (data.error)
		return data.error;

	return 0;
}
Commit	Line	Data
da7fbe58	1	/*
70f10482	2	* linux/drivers/mmc/core/sd_ops.h
da7fbe58 PO	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
4f665cb6	12	#include <linux/slab.h>
da7fbe58	13	#include <linux/types.h>
3ef77af1	14	#include <linux/export.h>
da7fbe58 PO	15	#include <linux/scatterlist.h>
	16
	17	#include <linux/mmc/host.h>
	18	#include <linux/mmc/card.h>
	19	#include <linux/mmc/mmc.h>
	20	#include <linux/mmc/sd.h>
	21
	22	#include "core.h"
	23	#include "sd_ops.h"
	24
cb87ea28	25	int mmc_app_cmd(struct mmc_host host, struct mmc_card card)
39361851 AB	26	{
39361851 AB	27	int err;
c7836d15	28	struct mmc_command cmd = {};
39361851	29
349583d6 SL	30	if (WARN_ON(card && card->host != host))
349583d6 SL	31	return -EINVAL;
39361851 AB	32
	33	cmd.opcode = MMC_APP_CMD;
	34
	35	if (card) {
	36	cmd.arg = card->rca << 16;
af517150	37	cmd.flags = MMC_RSP_SPI_R1 \| MMC_RSP_R1 \| MMC_CMD_AC;
39361851 AB	38	} else {
39361851 AB	39	cmd.arg = 0;
af517150	40	cmd.flags = MMC_RSP_SPI_R1 \| MMC_RSP_R1 \| MMC_CMD_BCR;
39361851 AB	41	}
	42
	43	err = mmc_wait_for_cmd(host, &cmd, 0);
17b0429d	44	if (err)
39361851 AB	45	return err;
	46
	47	/* Check that card supported application commands */
af517150	48	if (!mmc_host_is_spi(host) && !(cmd.resp[0] & R1_APP_CMD))
17b0429d	49	return -EOPNOTSUPP;
39361851	50
17b0429d	51	return 0;
39361851	52	}
cb87ea28	53	EXPORT_SYMBOL_GPL(mmc_app_cmd);
39361851	54
da7fbe58 PO	55	/**
	56	* mmc_wait_for_app_cmd - start an application command and wait for
	57	completion
	58	* @host: MMC host to start command
67a61c48	59	* @card: Card to send MMC_APP_CMD to
da7fbe58 PO	60	* @cmd: MMC command to start
	61	* @retries: maximum number of retries
	62	*
	63	* Sends a MMC_APP_CMD, checks the card response, sends the command
	64	* in the parameter and waits for it to complete. Return any error
	65	* that occurred while the command was executing. Do not attempt to
	66	* parse the response.
	67	*/
	68	int mmc_wait_for_app_cmd(struct mmc_host host, struct mmc_card card,
	69	struct mmc_command *cmd, int retries)
	70	{
c7836d15	71	struct mmc_request mrq = {};
da7fbe58 PO	72
	73	int i, err;
	74
349583d6 SL	75	if (retries < 0)
349583d6 SL	76	retries = MMC_CMD_RETRIES;
da7fbe58	77
17b0429d	78	err = -EIO;
da7fbe58 PO	79
	80	/*
	81	* We have to resend MMC_APP_CMD for each attempt so
	82	* we cannot use the retries field in mmc_command.
	83	*/
	84	for (i = 0;i <= retries;i++) {
da7fbe58	85	err = mmc_app_cmd(host, card);
af517150 DB	86	if (err) {
	87	/* no point in retrying; no APP commands allowed */
	88	if (mmc_host_is_spi(host)) {
	89	if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
	90	break;
	91	}
da7fbe58	92	continue;
af517150	93	}
da7fbe58 PO	94
	95	memset(&mrq, 0, sizeof(struct mmc_request));
	96
	97	memset(cmd->resp, 0, sizeof(cmd->resp));
	98	cmd->retries = 0;
	99
	100	mrq.cmd = cmd;
	101	cmd->data = NULL;
	102
	103	mmc_wait_for_req(host, &mrq);
	104
	105	err = cmd->error;
17b0429d	106	if (!cmd->error)
da7fbe58	107	break;
af517150 DB	108
	109	/* no point in retrying illegal APP commands */
	110	if (mmc_host_is_spi(host)) {
	111	if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
	112	break;
	113	}
da7fbe58 PO	114	}
	115
	116	return err;
	117	}
	118
	119	EXPORT_SYMBOL(mmc_wait_for_app_cmd);
	120
da7fbe58 PO	121	int mmc_app_set_bus_width(struct mmc_card *card, int width)
da7fbe58 PO	122	{
c7836d15	123	struct mmc_command cmd = {};
da7fbe58	124
da7fbe58 PO	125	cmd.opcode = SD_APP_SET_BUS_WIDTH;
	126	cmd.flags = MMC_RSP_R1 \| MMC_CMD_AC;
	127
	128	switch (width) {
	129	case MMC_BUS_WIDTH_1:
	130	cmd.arg = SD_BUS_WIDTH_1;
	131	break;
	132	case MMC_BUS_WIDTH_4:
	133	cmd.arg = SD_BUS_WIDTH_4;
	134	break;
	135	default:
17b0429d	136	return -EINVAL;
da7fbe58 PO	137	}
da7fbe58 PO	138
0899e741	139	return mmc_wait_for_app_cmd(card->host, card, &cmd, MMC_CMD_RETRIES);
da7fbe58 PO	140	}
	141
	142	int mmc_send_app_op_cond(struct mmc_host host, u32 ocr, u32 rocr)
	143	{
c7836d15	144	struct mmc_command cmd = {};
da7fbe58 PO	145	int i, err = 0;
da7fbe58 PO	146
da7fbe58	147	cmd.opcode = SD_APP_OP_COND;
af517150 DB	148	if (mmc_host_is_spi(host))
	149	cmd.arg = ocr & (1 << 30); /* SPI only defines one bit */
	150	else
	151	cmd.arg = ocr;
	152	cmd.flags = MMC_RSP_SPI_R1 \| MMC_RSP_R3 \| MMC_CMD_BCR;
da7fbe58 PO	153
	154	for (i = 100; i; i--) {
	155	err = mmc_wait_for_app_cmd(host, NULL, &cmd, MMC_CMD_RETRIES);
17b0429d	156	if (err)
da7fbe58 PO	157	break;
da7fbe58 PO	158
af517150 DB	159	/* if we're just probing, do a single pass */
af517150 DB	160	if (ocr == 0)
da7fbe58 PO	161	break;
da7fbe58 PO	162
af517150 DB	163	/* otherwise wait until reset completes */
	164	if (mmc_host_is_spi(host)) {
	165	if (!(cmd.resp[0] & R1_SPI_IDLE))
	166	break;
	167	} else {
	168	if (cmd.resp[0] & MMC_CARD_BUSY)
	169	break;
	170	}
	171
17b0429d	172	err = -ETIMEDOUT;
da7fbe58 PO	173
	174	mmc_delay(10);
	175	}
	176
5e863662 JR	177	if (!i)
	178	pr_err("%s: card never left busy state\n", mmc_hostname(host));
	179
af517150	180	if (rocr && !mmc_host_is_spi(host))
da7fbe58 PO	181	*rocr = cmd.resp[0];
	182
	183	return err;
	184	}
	185
	186	int mmc_send_if_cond(struct mmc_host *host, u32 ocr)
	187	{
c7836d15	188	struct mmc_command cmd = {};
da7fbe58 PO	189	int err;
da7fbe58 PO	190	static const u8 test_pattern = 0xAA;
af517150	191	u8 result_pattern;
da7fbe58 PO	192
	193	/*
	194	* To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
	195	* before SD_APP_OP_COND. This command will harmlessly fail for
	196	* SD 1.0 cards.
	197	*/
	198	cmd.opcode = SD_SEND_IF_COND;
	199	cmd.arg = ((ocr & 0xFF8000) != 0) << 8 \| test_pattern;
af517150	200	cmd.flags = MMC_RSP_SPI_R7 \| MMC_RSP_R7 \| MMC_CMD_BCR;
da7fbe58 PO	201
da7fbe58 PO	202	err = mmc_wait_for_cmd(host, &cmd, 0);
17b0429d	203	if (err)
da7fbe58 PO	204	return err;
da7fbe58 PO	205
af517150 DB	206	if (mmc_host_is_spi(host))
	207	result_pattern = cmd.resp[1] & 0xFF;
	208	else
	209	result_pattern = cmd.resp[0] & 0xFF;
	210
	211	if (result_pattern != test_pattern)
17b0429d	212	return -EIO;
da7fbe58	213
17b0429d	214	return 0;
da7fbe58 PO	215	}
	216
	217	int mmc_send_relative_addr(struct mmc_host host, unsigned int rca)
	218	{
	219	int err;
c7836d15	220	struct mmc_command cmd = {};
da7fbe58	221
da7fbe58 PO	222	cmd.opcode = SD_SEND_RELATIVE_ADDR;
	223	cmd.arg = 0;
	224	cmd.flags = MMC_RSP_R6 \| MMC_CMD_BCR;
	225
	226	err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
17b0429d	227	if (err)
da7fbe58 PO	228	return err;
	229
	230	*rca = cmd.resp[0] >> 16;
	231
17b0429d	232	return 0;
da7fbe58 PO	233	}
	234
	235	int mmc_app_send_scr(struct mmc_card card, u32 scr)
	236	{
	237	int err;
c7836d15 MY	238	struct mmc_request mrq = {};
	239	struct mmc_command cmd = {};
	240	struct mmc_data data = {};
da7fbe58	241	struct scatterlist sg;
4f665cb6	242	void *data_buf;
da7fbe58	243
af517150 DB	244	/* NOTE: caller guarantees scr is heap-allocated */
af517150 DB	245
da7fbe58	246	err = mmc_app_cmd(card->host, card);
17b0429d	247	if (err)
da7fbe58 PO	248	return err;
da7fbe58 PO	249
4f665cb6 YS	250	/* dma onto stack is unsafe/nonportable, but callers to this
	251	* routine normally provide temporary on-stack buffers ...
	252	*/
	253	data_buf = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
	254	if (data_buf == NULL)
	255	return -ENOMEM;
	256
da7fbe58 PO	257	mrq.cmd = &cmd;
	258	mrq.data = &data;
	259
	260	cmd.opcode = SD_APP_SEND_SCR;
	261	cmd.arg = 0;
af517150	262	cmd.flags = MMC_RSP_SPI_R1 \| MMC_RSP_R1 \| MMC_CMD_ADTC;
da7fbe58 PO	263
	264	data.blksz = 8;
	265	data.blocks = 1;
	266	data.flags = MMC_DATA_READ;
	267	data.sg = &sg;
	268	data.sg_len = 1;
	269
4f665cb6	270	sg_init_one(&sg, data_buf, 8);
da7fbe58	271
b146d26a	272	mmc_set_data_timeout(&data, card);
da7fbe58 PO	273
	274	mmc_wait_for_req(card->host, &mrq);
	275
4f665cb6 YS	276	memcpy(scr, data_buf, sizeof(card->raw_scr));
	277	kfree(data_buf);
	278
17b0429d	279	if (cmd.error)
da7fbe58	280	return cmd.error;
17b0429d	281	if (data.error)
da7fbe58 PO	282	return data.error;
da7fbe58 PO	283
1fa8dd14 PO	284	scr[0] = be32_to_cpu(scr[0]);
1fa8dd14 PO	285	scr[1] = be32_to_cpu(scr[1]);
da7fbe58	286
17b0429d	287	return 0;
da7fbe58 PO	288	}
	289
	290	int mmc_sd_switch(struct mmc_card *card, int mode, int group,
	291	u8 value, u8 *resp)
	292	{
c7836d15 MY	293	struct mmc_request mrq = {};
	294	struct mmc_command cmd = {};
	295	struct mmc_data data = {};
da7fbe58 PO	296	struct scatterlist sg;
da7fbe58 PO	297
af517150 DB	298	/* NOTE: caller guarantees resp is heap-allocated */
af517150 DB	299
da7fbe58 PO	300	mode = !!mode;
	301	value &= 0xF;
	302
da7fbe58 PO	303	mrq.cmd = &cmd;
	304	mrq.data = &data;
	305
	306	cmd.opcode = SD_SWITCH;
	307	cmd.arg = mode << 31 \| 0x00FFFFFF;
	308	cmd.arg &= ~(0xF << (group * 4));
	309	cmd.arg \|= value << (group * 4);
af517150	310	cmd.flags = MMC_RSP_SPI_R1 \| MMC_RSP_R1 \| MMC_CMD_ADTC;
da7fbe58 PO	311
	312	data.blksz = 64;
	313	data.blocks = 1;
	314	data.flags = MMC_DATA_READ;
	315	data.sg = &sg;
	316	data.sg_len = 1;
	317
	318	sg_init_one(&sg, resp, 64);
	319
b146d26a	320	mmc_set_data_timeout(&data, card);
da7fbe58 PO	321
	322	mmc_wait_for_req(card->host, &mrq);
	323
17b0429d	324	if (cmd.error)
da7fbe58	325	return cmd.error;
17b0429d	326	if (data.error)
da7fbe58 PO	327	return data.error;
da7fbe58 PO	328
17b0429d	329	return 0;
da7fbe58 PO	330	}
da7fbe58 PO	331
dfe86cba AH	332	int mmc_app_sd_status(struct mmc_card card, void ssr)
	333	{
	334	int err;
c7836d15 MY	335	struct mmc_request mrq = {};
	336	struct mmc_command cmd = {};
	337	struct mmc_data data = {};
dfe86cba AH	338	struct scatterlist sg;
dfe86cba AH	339
dfe86cba AH	340	/* NOTE: caller guarantees ssr is heap-allocated */
	341
	342	err = mmc_app_cmd(card->host, card);
	343	if (err)
	344	return err;
	345
dfe86cba AH	346	mrq.cmd = &cmd;
	347	mrq.data = &data;
	348
	349	cmd.opcode = SD_APP_SD_STATUS;
	350	cmd.arg = 0;
	351	cmd.flags = MMC_RSP_SPI_R2 \| MMC_RSP_R1 \| MMC_CMD_ADTC;
	352
	353	data.blksz = 64;
	354	data.blocks = 1;
	355	data.flags = MMC_DATA_READ;
	356	data.sg = &sg;
	357	data.sg_len = 1;
	358
	359	sg_init_one(&sg, ssr, 64);
	360
	361	mmc_set_data_timeout(&data, card);
	362
	363	mmc_wait_for_req(card->host, &mrq);
	364
	365	if (cmd.error)
	366	return cmd.error;
	367	if (data.error)
	368	return data.error;
	369
	370	return 0;
	371	}