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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: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Stefan Wahren 2017-01-14 17:29:18 +00:00 committed by Ulf Hansson
parent e81c022a00
commit 73a85069f9
1 changed files with 12 additions and 4 deletions
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16
drivers/mmc/host/mxs-mmc.c
View File

@ -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;
}
@ -495,7 +499,11 @@ static void mxs_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
WARN_ON(host->mrq != NULL);
host->mrq = mrq;
mxs_mmc_start_cmd(host, mrq->cmd);
if (mrq->sbc)
mxs_mmc_start_cmd(host, mrq->sbc);
else
mxs_mmc_start_cmd(host, mrq->cmd);
}
static void mxs_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
@ -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");