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Commit 73a85069 authored by Stefan Wahren's avatar Stefan Wahren Committed by Ulf Hansson
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mmc: mxs-mmc: Implement CMD23 support 



This patch implements support for multiblock transfers bounded
by SET_BLOCK_COUNT (CMD23) on the MXS MMC host driver.

Signed-off-by: default avatarStefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent e81c022a

drivers/mmc/host/mxs-mmc.c

+12 −4
Original line number Diff line number Diff line
@@ -153,7 +153,11 @@ static void mxs_mmc_request_done(struct mxs_mmc_host *host) 
		}

	}



	if (data) {

	if (cmd == mrq->sbc) {

		/* Finished CMD23, now send actual command. */

		mxs_mmc_start_cmd(host, mrq->cmd);

		return;

	} else if (data) {

		dma_unmap_sg(mmc_dev(host->mmc), data->sg,

			     data->sg_len, ssp->dma_dir);

		/*
@@ -166,7 +170,7 @@ static void mxs_mmc_request_done(struct mxs_mmc_host *host) 
			data->bytes_xfered = 0;



		host->data = NULL;

		if (mrq->stop) {

		if (data->stop && (data->error || !mrq->sbc)) {

			mxs_mmc_start_cmd(host, mrq->stop);

			return;

		}
@@ -495,6 +499,10 @@ static void mxs_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) 


	WARN_ON(host->mrq != NULL);

	host->mrq = mrq;



	if (mrq->sbc)

		mxs_mmc_start_cmd(host, mrq->sbc);

	else

		mxs_mmc_start_cmd(host, mrq->cmd);

}
@@ -642,7 +650,7 @@ static int mxs_mmc_probe(struct platform_device *pdev) 
	/* set mmc core parameters */

	mmc->ops = &mxs_mmc_ops;

	mmc->caps = MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED |

		    MMC_CAP_SDIO_IRQ | MMC_CAP_NEEDS_POLL;

		    MMC_CAP_SDIO_IRQ | MMC_CAP_NEEDS_POLL | MMC_CAP_CMD23;



	host->broken_cd = of_property_read_bool(np, "broken-cd");