[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);

static 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;
}

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)
{
	int err;
	struct mmc_request mrq = {};
	struct mmc_command cmd = {};
	struct mmc_data data = {};
	struct scatterlist sg;
	__be32 *scr;

	/* 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 ...
	 */
	scr = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
	if (!scr)
		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, scr, 8);

	mmc_set_data_timeout(&data, card);

	mmc_wait_for_req(card->host, &mrq);

	card->raw_scr[0] = be32_to_cpu(scr[0]);
	card->raw_scr[1] = be32_to_cpu(scr[1]);

	kfree(scr);

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

	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
9a4b869b	55	static int mmc_wait_for_app_cmd(struct mmc_host host, struct mmc_card card,
da7fbe58 PO	56	struct mmc_command *cmd, int retries)
da7fbe58 PO	57	{
c7836d15	58	struct mmc_request mrq = {};
da7fbe58 PO	59
	60	int i, err;
	61
349583d6 SL	62	if (retries < 0)
349583d6 SL	63	retries = MMC_CMD_RETRIES;
da7fbe58	64
17b0429d	65	err = -EIO;
da7fbe58 PO	66
	67	/*
	68	* We have to resend MMC_APP_CMD for each attempt so
	69	* we cannot use the retries field in mmc_command.
	70	*/
	71	for (i = 0;i <= retries;i++) {
da7fbe58	72	err = mmc_app_cmd(host, card);
af517150 DB	73	if (err) {
	74	/* no point in retrying; no APP commands allowed */
	75	if (mmc_host_is_spi(host)) {
	76	if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
	77	break;
	78	}
da7fbe58	79	continue;
af517150	80	}
da7fbe58 PO	81
	82	memset(&mrq, 0, sizeof(struct mmc_request));
	83
	84	memset(cmd->resp, 0, sizeof(cmd->resp));
	85	cmd->retries = 0;
	86
	87	mrq.cmd = cmd;
	88	cmd->data = NULL;
	89
	90	mmc_wait_for_req(host, &mrq);
	91
	92	err = cmd->error;
17b0429d	93	if (!cmd->error)
da7fbe58	94	break;
af517150 DB	95
	96	/* no point in retrying illegal APP commands */
	97	if (mmc_host_is_spi(host)) {
	98	if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
	99	break;
	100	}
da7fbe58 PO	101	}
	102
	103	return err;
	104	}
	105
da7fbe58 PO	106	int mmc_app_set_bus_width(struct mmc_card *card, int width)
da7fbe58 PO	107	{
c7836d15	108	struct mmc_command cmd = {};
da7fbe58	109
da7fbe58 PO	110	cmd.opcode = SD_APP_SET_BUS_WIDTH;
	111	cmd.flags = MMC_RSP_R1 \| MMC_CMD_AC;
	112
	113	switch (width) {
	114	case MMC_BUS_WIDTH_1:
	115	cmd.arg = SD_BUS_WIDTH_1;
	116	break;
	117	case MMC_BUS_WIDTH_4:
	118	cmd.arg = SD_BUS_WIDTH_4;
	119	break;
	120	default:
17b0429d	121	return -EINVAL;
da7fbe58 PO	122	}
da7fbe58 PO	123
0899e741	124	return mmc_wait_for_app_cmd(card->host, card, &cmd, MMC_CMD_RETRIES);
da7fbe58 PO	125	}
	126
	127	int mmc_send_app_op_cond(struct mmc_host host, u32 ocr, u32 rocr)
	128	{
c7836d15	129	struct mmc_command cmd = {};
da7fbe58 PO	130	int i, err = 0;
da7fbe58 PO	131
da7fbe58	132	cmd.opcode = SD_APP_OP_COND;
af517150 DB	133	if (mmc_host_is_spi(host))
	134	cmd.arg = ocr & (1 << 30); /* SPI only defines one bit */
	135	else
	136	cmd.arg = ocr;
	137	cmd.flags = MMC_RSP_SPI_R1 \| MMC_RSP_R3 \| MMC_CMD_BCR;
da7fbe58 PO	138
	139	for (i = 100; i; i--) {
	140	err = mmc_wait_for_app_cmd(host, NULL, &cmd, MMC_CMD_RETRIES);
17b0429d	141	if (err)
da7fbe58 PO	142	break;
da7fbe58 PO	143
af517150 DB	144	/* if we're just probing, do a single pass */
af517150 DB	145	if (ocr == 0)
da7fbe58 PO	146	break;
da7fbe58 PO	147
af517150 DB	148	/* otherwise wait until reset completes */
	149	if (mmc_host_is_spi(host)) {
	150	if (!(cmd.resp[0] & R1_SPI_IDLE))
	151	break;
	152	} else {
	153	if (cmd.resp[0] & MMC_CARD_BUSY)
	154	break;
	155	}
	156
17b0429d	157	err = -ETIMEDOUT;
da7fbe58 PO	158
	159	mmc_delay(10);
	160	}
	161
5e863662 JR	162	if (!i)
	163	pr_err("%s: card never left busy state\n", mmc_hostname(host));
	164
af517150	165	if (rocr && !mmc_host_is_spi(host))
da7fbe58 PO	166	*rocr = cmd.resp[0];
	167
	168	return err;
	169	}
	170
	171	int mmc_send_if_cond(struct mmc_host *host, u32 ocr)
	172	{
c7836d15	173	struct mmc_command cmd = {};
da7fbe58 PO	174	int err;
da7fbe58 PO	175	static const u8 test_pattern = 0xAA;
af517150	176	u8 result_pattern;
da7fbe58 PO	177
	178	/*
	179	* To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
	180	* before SD_APP_OP_COND. This command will harmlessly fail for
	181	* SD 1.0 cards.
	182	*/
	183	cmd.opcode = SD_SEND_IF_COND;
	184	cmd.arg = ((ocr & 0xFF8000) != 0) << 8 \| test_pattern;
af517150	185	cmd.flags = MMC_RSP_SPI_R7 \| MMC_RSP_R7 \| MMC_CMD_BCR;
da7fbe58 PO	186
da7fbe58 PO	187	err = mmc_wait_for_cmd(host, &cmd, 0);
17b0429d	188	if (err)
da7fbe58 PO	189	return err;
da7fbe58 PO	190
af517150 DB	191	if (mmc_host_is_spi(host))
	192	result_pattern = cmd.resp[1] & 0xFF;
	193	else
	194	result_pattern = cmd.resp[0] & 0xFF;
	195
	196	if (result_pattern != test_pattern)
17b0429d	197	return -EIO;
da7fbe58	198
17b0429d	199	return 0;
da7fbe58 PO	200	}
	201
	202	int mmc_send_relative_addr(struct mmc_host host, unsigned int rca)
	203	{
	204	int err;
c7836d15	205	struct mmc_command cmd = {};
da7fbe58	206
da7fbe58 PO	207	cmd.opcode = SD_SEND_RELATIVE_ADDR;
	208	cmd.arg = 0;
	209	cmd.flags = MMC_RSP_R6 \| MMC_CMD_BCR;
	210
	211	err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
17b0429d	212	if (err)
da7fbe58 PO	213	return err;
	214
	215	*rca = cmd.resp[0] >> 16;
	216
17b0429d	217	return 0;
da7fbe58 PO	218	}
da7fbe58 PO	219
06c9ccb7	220	int mmc_app_send_scr(struct mmc_card *card)
da7fbe58 PO	221	{
da7fbe58 PO	222	int err;
c7836d15 MY	223	struct mmc_request mrq = {};
	224	struct mmc_command cmd = {};
	225	struct mmc_data data = {};
da7fbe58	226	struct scatterlist sg;
06c9ccb7	227	__be32 *scr;
da7fbe58	228
af517150 DB	229	/* NOTE: caller guarantees scr is heap-allocated */
af517150 DB	230
da7fbe58	231	err = mmc_app_cmd(card->host, card);
17b0429d	232	if (err)
da7fbe58 PO	233	return err;
da7fbe58 PO	234
4f665cb6 YS	235	/* dma onto stack is unsafe/nonportable, but callers to this
	236	* routine normally provide temporary on-stack buffers ...
	237	*/
06c9ccb7 WT	238	scr = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
06c9ccb7 WT	239	if (!scr)
4f665cb6 YS	240	return -ENOMEM;
4f665cb6 YS	241
da7fbe58 PO	242	mrq.cmd = &cmd;
	243	mrq.data = &data;
	244
	245	cmd.opcode = SD_APP_SEND_SCR;
	246	cmd.arg = 0;
af517150	247	cmd.flags = MMC_RSP_SPI_R1 \| MMC_RSP_R1 \| MMC_CMD_ADTC;
da7fbe58 PO	248
	249	data.blksz = 8;
	250	data.blocks = 1;
	251	data.flags = MMC_DATA_READ;
	252	data.sg = &sg;
	253	data.sg_len = 1;
	254
06c9ccb7	255	sg_init_one(&sg, scr, 8);
da7fbe58	256
b146d26a	257	mmc_set_data_timeout(&data, card);
da7fbe58 PO	258
	259	mmc_wait_for_req(card->host, &mrq);
	260
06c9ccb7 WT	261	card->raw_scr[0] = be32_to_cpu(scr[0]);
	262	card->raw_scr[1] = be32_to_cpu(scr[1]);
	263
	264	kfree(scr);
4f665cb6	265
17b0429d	266	if (cmd.error)
da7fbe58	267	return cmd.error;
17b0429d	268	if (data.error)
da7fbe58 PO	269	return data.error;
da7fbe58 PO	270
17b0429d	271	return 0;
da7fbe58 PO	272	}
	273
	274	int mmc_sd_switch(struct mmc_card *card, int mode, int group,
	275	u8 value, u8 *resp)
	276	{
c7836d15 MY	277	struct mmc_request mrq = {};
	278	struct mmc_command cmd = {};
	279	struct mmc_data data = {};
da7fbe58 PO	280	struct scatterlist sg;
da7fbe58 PO	281
af517150 DB	282	/* NOTE: caller guarantees resp is heap-allocated */
af517150 DB	283
da7fbe58 PO	284	mode = !!mode;
	285	value &= 0xF;
	286
da7fbe58 PO	287	mrq.cmd = &cmd;
	288	mrq.data = &data;
	289
	290	cmd.opcode = SD_SWITCH;
	291	cmd.arg = mode << 31 \| 0x00FFFFFF;
	292	cmd.arg &= ~(0xF << (group * 4));
	293	cmd.arg \|= value << (group * 4);
af517150	294	cmd.flags = MMC_RSP_SPI_R1 \| MMC_RSP_R1 \| MMC_CMD_ADTC;
da7fbe58 PO	295
	296	data.blksz = 64;
	297	data.blocks = 1;
	298	data.flags = MMC_DATA_READ;
	299	data.sg = &sg;
	300	data.sg_len = 1;
	301
	302	sg_init_one(&sg, resp, 64);
	303
b146d26a	304	mmc_set_data_timeout(&data, card);
da7fbe58 PO	305
	306	mmc_wait_for_req(card->host, &mrq);
	307
17b0429d	308	if (cmd.error)
da7fbe58	309	return cmd.error;
17b0429d	310	if (data.error)
da7fbe58 PO	311	return data.error;
da7fbe58 PO	312
17b0429d	313	return 0;
da7fbe58 PO	314	}
da7fbe58 PO	315
dfe86cba AH	316	int mmc_app_sd_status(struct mmc_card card, void ssr)
	317	{
	318	int err;
c7836d15 MY	319	struct mmc_request mrq = {};
	320	struct mmc_command cmd = {};
	321	struct mmc_data data = {};
dfe86cba AH	322	struct scatterlist sg;
dfe86cba AH	323
dfe86cba AH	324	/* NOTE: caller guarantees ssr is heap-allocated */
	325
	326	err = mmc_app_cmd(card->host, card);
	327	if (err)
	328	return err;
	329
dfe86cba AH	330	mrq.cmd = &cmd;
	331	mrq.data = &data;
	332
	333	cmd.opcode = SD_APP_SD_STATUS;
	334	cmd.arg = 0;
	335	cmd.flags = MMC_RSP_SPI_R2 \| MMC_RSP_R1 \| MMC_CMD_ADTC;
	336
	337	data.blksz = 64;
	338	data.blocks = 1;
	339	data.flags = MMC_DATA_READ;
	340	data.sg = &sg;
	341	data.sg_len = 1;
	342
	343	sg_init_one(&sg, ssr, 64);
	344
	345	mmc_set_data_timeout(&data, card);
	346
	347	mmc_wait_for_req(card->host, &mrq);
	348
	349	if (cmd.error)
	350	return cmd.error;
	351	if (data.error)
	352	return data.error;
	353
	354	return 0;
	355	}