Release 4.7 drivers/mmc/core/mmc_ops.c

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

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

#include "core.h"
#include "host.h"
#include "mmc_ops.h"


#define MMC_OPS_TIMEOUT_MS	(10 * 60 * 1000) 
/* 10 minute timeout */


static const u8 tuning_blk_pattern_4bit[] = {
	0xff, 0x0f, 0xff, 0x00, 0xff, 0xcc, 0xc3, 0xcc,
	0xc3, 0x3c, 0xcc, 0xff, 0xfe, 0xff, 0xfe, 0xef,
	0xff, 0xdf, 0xff, 0xdd, 0xff, 0xfb, 0xff, 0xfb,
	0xbf, 0xff, 0x7f, 0xff, 0x77, 0xf7, 0xbd, 0xef,
	0xff, 0xf0, 0xff, 0xf0, 0x0f, 0xfc, 0xcc, 0x3c,
	0xcc, 0x33, 0xcc, 0xcf, 0xff, 0xef, 0xff, 0xee,
	0xff, 0xfd, 0xff, 0xfd, 0xdf, 0xff, 0xbf, 0xff,
	0xbb, 0xff, 0xf7, 0xff, 0xf7, 0x7f, 0x7b, 0xde,
};


static const u8 tuning_blk_pattern_8bit[] = {
	0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00,
	0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 0xcc,
	0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff,
	0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff,
	0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd,
	0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb,
	0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff,
	0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff,
	0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00,
	0x00, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc,
	0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff,
	0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee,
	0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd,
	0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff,
	0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff,
	0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee,
};



static inline int __mmc_send_status(struct mmc_card *card, u32 *status,
				    bool ignore_crc)
{
	int err;
	struct mmc_command cmd = {0};

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

	cmd.opcode = MMC_SEND_STATUS;
	if (!mmc_host_is_spi(card->host))
		cmd.arg = card->rca << 16;
	cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
	if (ignore_crc)
		cmd.flags &= ~MMC_RSP_CRC;

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

	/* NOTE: callers are required to understand the difference
         * between "native" and SPI format status words!
         */
	if (status)
		*status = cmd.resp[0];

	return 0;
}

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int mmc_send_status(struct mmc_card *card, u32 *status)
{
	return __mmc_send_status(card, status, false);
}

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static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card)
{
	struct mmc_command cmd = {0};

	BUG_ON(!host);

	cmd.opcode = MMC_SELECT_CARD;

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

	return mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
}

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int mmc_select_card(struct mmc_card *card)
{
	BUG_ON(!card);

	return _mmc_select_card(card->host, card);
}

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int mmc_deselect_cards(struct mmc_host *host)
{
	return _mmc_select_card(host, NULL);
}

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/*
 * Write the value specified in the device tree or board code into the optional
 * 16 bit Driver Stage Register. This can be used to tune raise/fall times and
 * drive strength of the DAT and CMD outputs. The actual meaning of a given
 * value is hardware dependant.
 * The presence of the DSR register can be determined from the CSD register,
 * bit 76.
 */


int mmc_set_dsr(struct mmc_host *host)
{
	struct mmc_command cmd = {0};

	cmd.opcode = MMC_SET_DSR;

	cmd.arg = (host->dsr << 16) | 0xffff;
	cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;

	return mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
}

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int mmc_go_idle(struct mmc_host *host)
{
	int err;
	struct mmc_command cmd = {0};

	/*
         * Non-SPI hosts need to prevent chipselect going active during
         * GO_IDLE; that would put chips into SPI mode.  Remind them of
         * that in case of hardware that won't pull up DAT3/nCS otherwise.
         *
         * SPI hosts ignore ios.chip_select; it's managed according to
         * rules that must accommodate non-MMC slaves which this layer
         * won't even know about.
         */
	if (!mmc_host_is_spi(host)) {
		mmc_set_chip_select(host, MMC_CS_HIGH);
		mmc_delay(1);
	}

	cmd.opcode = MMC_GO_IDLE_STATE;
	cmd.arg = 0;
	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC;

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

	mmc_delay(1);

	if (!mmc_host_is_spi(host)) {
		mmc_set_chip_select(host, MMC_CS_DONTCARE);
		mmc_delay(1);
	}

	host->use_spi_crc = 0;

	return err;
}

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

	BUG_ON(!host);

	cmd.opcode = MMC_SEND_OP_COND;
	cmd.arg = mmc_host_is_spi(host) ? 0 : ocr;
	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;

	for (i = 100; i; i--) {
		err = mmc_wait_for_cmd(host, &cmd, 0);
		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 (rocr && !mmc_host_is_spi(host))
		*rocr = cmd.resp[0];

	return err;
}

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int mmc_all_send_cid(struct mmc_host *host, u32 *cid)
{
	int err;
	struct mmc_command cmd = {0};

	BUG_ON(!host);
	BUG_ON(!cid);

	cmd.opcode = MMC_ALL_SEND_CID;
	cmd.arg = 0;
	cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR;

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

	memcpy(cid, cmd.resp, sizeof(u32) * 4);

	return 0;
}

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int mmc_set_relative_addr(struct mmc_card *card)
{
	struct mmc_command cmd = {0};

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

	cmd.opcode = MMC_SET_RELATIVE_ADDR;
	cmd.arg = card->rca << 16;
	cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;

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

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static int

mmc_send_cxd_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode)
{
	int err;
	struct mmc_command cmd = {0};

	BUG_ON(!host);
	BUG_ON(!cxd);

	cmd.opcode = opcode;
	cmd.arg = arg;
	cmd.flags = MMC_RSP_R2 | MMC_CMD_AC;

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

	memcpy(cxd, cmd.resp, sizeof(u32) * 4);

	return 0;
}

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/*
 * NOTE: void *buf, caller for the buf is required to use DMA-capable
 * buffer or on-stack buffer (with some overhead in callee).
 */

static int

mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host,
		u32 opcode, void *buf, unsigned len)
{
	struct mmc_request mrq = {NULL};
	struct mmc_command cmd = {0};
	struct mmc_data data = {0};
	struct scatterlist sg;

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

	cmd.opcode = opcode;
	cmd.arg = 0;

	/* NOTE HACK:  the MMC_RSP_SPI_R1 is always correct here, but we
         * rely on callers to never use this with "native" calls for reading
         * CSD or CID.  Native versions of those commands use the R2 type,
         * not R1 plus a data block.
         */
	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;

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

	sg_init_one(&sg, buf, len);

	if (opcode == MMC_SEND_CSD || opcode == MMC_SEND_CID) {
		/*
                 * The spec states that CSR and CID accesses have a timeout
                 * of 64 clock cycles.
                 */
		data.timeout_ns = 0;
		data.timeout_clks = 64;
	} else
		mmc_set_data_timeout(&data, card);

	mmc_wait_for_req(host, &mrq);

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

	return 0;
}

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int mmc_send_csd(struct mmc_card *card, u32 *csd)
{
	int ret, i;
	u32 *csd_tmp;

	if (!mmc_host_is_spi(card->host))
		return mmc_send_cxd_native(card->host, card->rca << 16,
				csd, MMC_SEND_CSD);

	csd_tmp = kzalloc(16, GFP_KERNEL);
	if (!csd_tmp)
		return -ENOMEM;

	ret = mmc_send_cxd_data(card, card->host, MMC_SEND_CSD, csd_tmp, 16);
	if (ret)
		goto err;

	for (i = 0;i < 4;i++)
		csd[i] = be32_to_cpu(csd_tmp[i]);

err:
	kfree(csd_tmp);
	return ret;
}

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int mmc_send_cid(struct mmc_host *host, u32 *cid)
{
	int ret, i;
	u32 *cid_tmp;

	if (!mmc_host_is_spi(host)) {
		if (!host->card)
			return -EINVAL;
		return mmc_send_cxd_native(host, host->card->rca << 16,
				cid, MMC_SEND_CID);
	}

	cid_tmp = kzalloc(16, GFP_KERNEL);
	if (!cid_tmp)
		return -ENOMEM;

	ret = mmc_send_cxd_data(NULL, host, MMC_SEND_CID, cid_tmp, 16);
	if (ret)
		goto err;

	for (i = 0;i < 4;i++)
		cid[i] = be32_to_cpu(cid_tmp[i]);

err:
	kfree(cid_tmp);
	return ret;
}

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int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
{
	int err;
	u8 *ext_csd;

	if (!card || !new_ext_csd)
		return -EINVAL;

	if (!mmc_can_ext_csd(card))
		return -EOPNOTSUPP;

	/*
         * As the ext_csd is so large and mostly unused, we don't store the
         * raw block in mmc_card.
         */
	ext_csd = kzalloc(512, GFP_KERNEL);
	if (!ext_csd)
		return -ENOMEM;

	err = mmc_send_cxd_data(card, card->host, MMC_SEND_EXT_CSD, ext_csd,
				512);
	if (err)
		kfree(ext_csd);
	else
		*new_ext_csd = ext_csd;

	return err;
}
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EXPORT_SYMBOL_GPL(mmc_get_ext_csd);



int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp)
{
	struct mmc_command cmd = {0};
	int err;

	cmd.opcode = MMC_SPI_READ_OCR;
	cmd.arg = highcap ? (1 << 30) : 0;
	cmd.flags = MMC_RSP_SPI_R3;

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

	*ocrp = cmd.resp[1];
	return err;
}

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int mmc_spi_set_crc(struct mmc_host *host, int use_crc)
{
	struct mmc_command cmd = {0};
	int err;

	cmd.opcode = MMC_SPI_CRC_ON_OFF;
	cmd.flags = MMC_RSP_SPI_R1;
	cmd.arg = use_crc;

	err = mmc_wait_for_cmd(host, &cmd, 0);
	if (!err)
		host->use_spi_crc = use_crc;
	return err;
}

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int mmc_switch_status_error(struct mmc_host *host, u32 status)
{
	if (mmc_host_is_spi(host)) {
		if (status & R1_SPI_ILLEGAL_COMMAND)
			return -EBADMSG;
	} else {
		if (status & 0xFDFFA000)
			pr_warn("%s: unexpected status %#x after switch\n",
				mmc_hostname(host), status);
		if (status & R1_SWITCH_ERROR)
			return -EBADMSG;
	}
	return 0;
}

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/**
 *      __mmc_switch - modify EXT_CSD register
 *      @card: the MMC card associated with the data transfer
 *      @set: cmd set values
 *      @index: EXT_CSD register index
 *      @value: value to program into EXT_CSD register
 *      @timeout_ms: timeout (ms) for operation performed by register write,
 *                   timeout of zero implies maximum possible timeout
 *      @use_busy_signal: use the busy signal as response type
 *      @send_status: send status cmd to poll for busy
 *      @ignore_crc: ignore CRC errors when sending status cmd to poll for busy
 *
 *      Modifies the EXT_CSD register for selected card.
 */


int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
		unsigned int timeout_ms, bool use_busy_signal, bool send_status,
		bool ignore_crc)
{
	struct mmc_host *host = card->host;
	int err;
	struct mmc_command cmd = {0};
	unsigned long timeout;
	u32 status = 0;
	bool use_r1b_resp = use_busy_signal;
	bool expired = false;

	mmc_retune_hold(host);

	/*
         * If the cmd timeout and the max_busy_timeout of the host are both
         * specified, let's validate them. A failure means we need to prevent
         * the host from doing hw busy detection, which is done by converting
         * to a R1 response instead of a R1B.
         */
	if (timeout_ms && host->max_busy_timeout &&
		(timeout_ms > host->max_busy_timeout))
		use_r1b_resp = false;

	cmd.opcode = MMC_SWITCH;
	cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
		  (index << 16) |
		  (value << 8) |
		  set;
	cmd.flags = MMC_CMD_AC;
	if (use_r1b_resp) {
		cmd.flags |= MMC_RSP_SPI_R1B | MMC_RSP_R1B;
		/*
                 * A busy_timeout of zero means the host can decide to use
                 * whatever value it finds suitable.
                 */
		cmd.busy_timeout = timeout_ms;
	} else {
		cmd.flags |= MMC_RSP_SPI_R1 | MMC_RSP_R1;
	}

	if (index == EXT_CSD_SANITIZE_START)
		cmd.sanitize_busy = true;

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

	/* No need to check card status in case of unblocking command */
	if (!use_busy_signal)
		goto out;

	/*
         * CRC errors shall only be ignored in cases were CMD13 is used to poll
         * to detect busy completion.
         */
	if ((host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp)
		ignore_crc = false;

	/* We have an unspecified cmd timeout, use the fallback value. */
	if (!timeout_ms)
		timeout_ms = MMC_OPS_TIMEOUT_MS;

	/* Must check status to be sure of no errors. */
	timeout = jiffies + msecs_to_jiffies(timeout_ms);
	do {
		if (send_status) {
			/*
                         * Due to the possibility of being preempted after
                         * sending the status command, check the expiration
                         * time first.
                         */
			expired = time_after(jiffies, timeout);
			err = __mmc_send_status(card, &status, ignore_crc);
			if (err)
				goto out;
		}
		if ((host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp)
			break;
		if (mmc_host_is_spi(host))
			break;

		/*
                 * We are not allowed to issue a status command and the host
                 * does'nt support MMC_CAP_WAIT_WHILE_BUSY, then we can only
                 * rely on waiting for the stated timeout to be sufficient.
                 */
		if (!send_status) {
			mmc_delay(timeout_ms);
			goto out;
		}

		/* Timeout if the device never leaves the program state. */
		if (expired && R1_CURRENT_STATE(status) == R1_STATE_PRG) {
			pr_err("%s: Card stuck in programming state! %s\n",
				mmc_hostname(host), __func__);
			err = -ETIMEDOUT;
			goto out;
		}
	} while (R1_CURRENT_STATE(status) == R1_STATE_PRG);

	err = mmc_switch_status_error(host, status);
out:
	mmc_retune_release(host);

	return err;
}

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ulf hansson
ulf hansson
96
25.26%
5
27.78%
adrian hunter
adrian hunter
85
22.37%
3
16.67%
pierre ossman
pierre ossman
80
21.05%
1
5.56%
trey ramsay
trey ramsay
34
8.95%
1
5.56%
jaehoon chung
jaehoon chung
28
7.37%
2
11.11%
chaotian jing
chaotian jing
21
5.53%
1
5.56%
seungwon jeon
seungwon jeon
14
3.68%
1
5.56%
maya erez
maya erez
12
3.16%
1
5.56%
chris ball
chris ball
4
1.05%
1
5.56%
andrei warkentin
andrei warkentin
4
1.05%
1
5.56%
david brownell
david brownell
2
0.53%
1
5.56%
Total
380
100.00%
18
100.00%



int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
		unsigned int timeout_ms)
{
	return __mmc_switch(card, set, index, value, timeout_ms, true, true,
				false);
}
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jaehoon chung
jaehoon chung
39
90.70%
1
33.33%
ulf hansson
ulf hansson
4
9.30%
2
66.67%
Total
43
100.00%
3
100.00%


EXPORT_SYMBOL_GPL(mmc_switch);



int mmc_send_tuning(struct mmc_host *host, u32 opcode, int *cmd_error)
{
	struct mmc_request mrq = {NULL};
	struct mmc_command cmd = {0};
	struct mmc_data data = {0};
	struct scatterlist sg;
	struct mmc_ios *ios = &host->ios;
	const u8 *tuning_block_pattern;
	int size, err = 0;
	u8 *data_buf;

	if (ios->bus_width == MMC_BUS_WIDTH_8) {
		tuning_block_pattern = tuning_blk_pattern_8bit;
		size = sizeof(tuning_blk_pattern_8bit);
	} else if (ios->bus_width == MMC_BUS_WIDTH_4) {
		tuning_block_pattern = tuning_blk_pattern_4bit;
		size = sizeof(tuning_blk_pattern_4bit);
	} else
		return -EINVAL;

	data_buf = kzalloc(size, GFP_KERNEL);
	if (!data_buf)
		return -ENOMEM;

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

	cmd.opcode = opcode;
	cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;

	data.blksz = size;
	data.blocks = 1;
	data.flags = MMC_DATA_READ;

	/*
         * According to the tuning specs, Tuning process
         * is normally shorter 40 executions of CMD19,
         * and timeout value should be shorter than 150 ms
         */
	data.timeout_ns = 150 * NSEC_PER_MSEC;

	data.sg = &sg;
	data.sg_len = 1;
	sg_init_one(&sg, data_buf, size);

	mmc_wait_for_req(host, &mrq);

	if (cmd_error)
		*cmd_error = cmd.error;

	if (cmd.error) {
		err = cmd.error;
		goto out;
	}

	if (data.error) {
		err = data.error;
		goto out;
	}

	if (memcmp(data_buf, tuning_block_pattern, size))
		err = -EIO;

out:
	kfree(data_buf);
	return err;
}
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minda chen
minda chen
272
92.52%
1
33.33%
chaotian jing
chaotian jing
18
6.12%
1
33.33%
ulf hansson
ulf hansson
4
1.36%
1
33.33%
Total
294
100.00%
3
100.00%


EXPORT_SYMBOL_GPL(mmc_send_tuning);


static int

mmc_send_bus_test(struct mmc_card *card, struct mmc_host *host, u8 opcode,
		  u8 len)
{
	struct mmc_request mrq = {NULL};
	struct mmc_command cmd = {0};
	struct mmc_data data = {0};
	struct scatterlist sg;
	u8 *data_buf;
	u8 *test_buf;
	int i, err;
	static u8 testdata_8bit[8] = { 0x55, 0xaa, 0, 0, 0, 0, 0, 0 };
	static u8 testdata_4bit[4] = { 0x5a, 0, 0, 0 };

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

	if (len == 8)
		test_buf = testdata_8bit;
	else if (len == 4)
		test_buf = testdata_4bit;
	else {
		pr_err("%s: Invalid bus_width %d\n",
		       mmc_hostname(host), len);
		kfree(data_buf);
		return -EINVAL;
	}

	if (opcode == MMC_BUS_TEST_W)
		memcpy(data_buf, test_buf, len);

	mrq.cmd = &cmd;
	mrq.data = &data;
	cmd.opcode = opcode;
	cmd.arg = 0;

	/* NOTE HACK:  the MMC_RSP_SPI_R1 is always correct here, but we
         * rely on callers to never use this with "native" calls for reading
         * CSD or CID.  Native versions of those commands use the R2 type,
         * not R1 plus a data block.
         */
	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;

	data.blksz = len;
	data.blocks = 1;
	if (opcode == MMC_BUS_TEST_R)
		data.flags = MMC_DATA_READ;
	else
		data.flags = MMC_DATA_WRITE;

	data.sg = &sg;
	data.sg_len = 1;
	mmc_set_data_timeout(&data, card);
	sg_init_one(&sg, data_buf, len);
	mmc_wait_for_req(host, &mrq);
	err = 0;
	if (opcode == MMC_BUS_TEST_R) {
		for (i = 0; i < len / 4; i++)
			if ((test_buf[i] ^ data_buf[i]) != 0xff) {
				err = -EIO;
				break;
			}
	}
	kfree(data_buf);

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

	return err;
}

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aries lee
aries lee
351
94.35%
1
14.29%
chris ball
chris ball
11
2.96%
3
42.86%
minjian wu
minjian wu
8
2.15%
1
14.29%
girish k s
girish k s
1
0.27%
1
14.29%
venkatraman sathiyamoorthy
venkatraman sathiyamoorthy
1
0.27%
1
14.29%
Total
372
100.00%
7
100.00%



int mmc_bus_test(struct mmc_card *card, u8 bus_width)
{
	int width;

	if (bus_width == MMC_BUS_WIDTH_8)
		width = 8;
	else if (bus_width == MMC_BUS_WIDTH_4)
		width = 4;
	else if (bus_width == MMC_BUS_WIDTH_1)
		return 0; /* no need for test */
	else
		return -EINVAL;

	/*
         * Ignore errors from BUS_TEST_W.  BUS_TEST_R will fail if there
         * is a problem.  This improves chances that the test will work.
         */
	mmc_send_bus_test(card, card->host, MMC_BUS_TEST_W, width);
	return mmc_send_bus_test(card, card->host, MMC_BUS_TEST_R, width);
}

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aries lee
aries lee
80
98.77%
1
50.00%
masahiro yamada
masahiro yamada
1
1.23%
1
50.00%
Total
81
100.00%
2
100.00%



int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status)
{
	struct mmc_command cmd = {0};
	unsigned int opcode;
	int err;

	if (!card->ext_csd.hpi) {
		pr_warn("%s: Card didn't support HPI command\n",
			mmc_hostname(card->host));
		return -EINVAL;
	}

	opcode = card->ext_csd.hpi_cmd;
	if (opcode == MMC_STOP_TRANSMISSION)
		cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
	else if (opcode == MMC_SEND_STATUS)
		cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;

	cmd.opcode = opcode;
	cmd.arg = card->rca << 16 | 1;

	err = mmc_wait_for_cmd(card->host, &cmd, 0);
	if (err) {
		pr_warn("%s: error %d interrupting operation. "
			"HPI command response %#x\n", mmc_hostname(card->host),
			err, cmd.resp[0]);
		return err;
	}
	if (status)
		*status = cmd.resp[0];

	return 0;
}

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jaehoon chung
jaehoon chung
172
99.42%
2
66.67%
joe perches
joe perches
1
0.58%
1
33.33%
Total
173
100.00%
3
100.00%



int mmc_can_ext_csd(struct mmc_card *card)
{
	return (card && card->csd.mmca_vsn > CSD_SPEC_VER_3);
}
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ulf hansson
ulf hansson
23
100.00%
1
100.00%
Total
23
100.00%
1
100.00%

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pierre ossman
pierre ossman
878
25.09%
4
8.51%
ulf hansson
ulf hansson
636
18.17%
12
25.53%
aries lee
aries lee
431
12.31%
1
2.13%
david brownell
david brownell
377
10.77%
1
2.13%
minda chen
minda chen
277
7.91%
1
2.13%
jaehoon chung
jaehoon chung
239
6.83%
4
8.51%
adrian hunter
adrian hunter
176
5.03%
4
8.51%
seungwon jeon
seungwon jeon
168
4.80%
1
2.13%
kyungsik lee
kyungsik lee
71
2.03%
1
2.13%
chris ball
chris ball
58
1.66%
3
6.38%
sascha hauer
sascha hauer
58
1.66%
1
2.13%
chaotian jing
chaotian jing
39
1.11%
2
4.26%
trey ramsay
trey ramsay
39
1.11%
1
2.13%
maya erez
maya erez
12
0.34%
1
2.13%
matthew fleming
matthew fleming
10
0.29%
1
2.13%
andrei warkentin
andrei warkentin
9
0.26%
1
2.13%
minjian wu
minjian wu
8
0.23%
1
2.13%
masahiro yamada
masahiro yamada
3
0.09%
1
2.13%
tejun heo
tejun heo
3
0.09%
1
2.13%
paul gortmaker
paul gortmaker
3
0.09%
1
2.13%
venkatraman sathiyamoorthy
venkatraman sathiyamoorthy
2
0.06%
1
2.13%
girish k s
girish k s
1
0.03%
1
2.13%
joe perches
joe perches
1
0.03%
1
2.13%
lucas de marchi
lucas de marchi
1
0.03%
1
2.13%
Total
3500
100.00%
47
100.00%
  
Directory: drivers/mmc/core

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