int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
{
	int err;
	struct mmc_request mrq = {NULL};
	struct mmc_command cmd = {0};
	struct mmc_data data = {0};
	struct scatterlist sg;
	void *data_buf;

	BUG_ON(!card);
	BUG_ON(!card->host);
	BUG_ON(!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 ...
	 */
	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;
}
示例#2
0
int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
{
	int err;
	struct mmc_request mrq = {NULL};
	struct mmc_command cmd = {0};
	struct mmc_data data = {0};
	struct scatterlist sg;
	void *data_buf;

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

	

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

	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;
}
示例#3
0
/**
 *	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;

	BUG_ON(!cmd);
	BUG_ON(retries < 0);

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

		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;
}
示例#4
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;

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

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

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

	memset(&mrq, 0, sizeof(struct mmc_request));
	memset(&cmd, 0, sizeof(struct mmc_command));
	memset(&data, 0, sizeof(struct mmc_data));

	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);

	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;
}
示例#5
0
int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card,
	struct mmc_command *cmd, int retries)
{
	struct mmc_request mrq = {NULL};

	int i, err;

	BUG_ON(!cmd);
	BUG_ON(retries < 0);

	err = -EIO;

	for (i = 0;i <= retries;i++) {
		err = mmc_app_cmd(host, card);
		if (err) {
			
			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;

		
		if (mmc_host_is_spi(host)) {
			if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
				break;
		}
	}

	return err;
}
int mmc_app_sd_status(struct mmc_card *card, void *ssr)
{
	int err;
	struct mmc_request mrq = {NULL};
	struct mmc_command cmd = {0};
	struct mmc_data data = {0};
	struct scatterlist sg;

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

	/* 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;
}
示例#7
0
文件: sd_ops.c 项目: cilynx/dd-wrt
/**
 *	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;

	BUG_ON(!cmd);
	BUG_ON(retries < 0);

	err = MMC_ERR_INVALID;

	/*
	 * 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++) {
		memset(&mrq, 0, sizeof(struct mmc_request));

		err = mmc_app_cmd(host, card);
		if (err != MMC_ERR_NONE)
			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 == MMC_ERR_NONE)
			break;
	}

	return err;
}