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authorAndrei Warkentin <andreiw@motorola.com>2011-05-23 15:06:39 -0500
committerChris Ball <cjb@laptop.org>2011-05-25 16:51:40 -0400
commit8edf63710bd43e62d59bfe017df542fa0713bbb3 (patch)
tree98641f28d6d3ce2ca5c021de20f8dec35fb8affe /drivers/mmc/host/sdhci.c
parentf0d89972b01798cf9d245dfa1cacfa0ee78a3593 (diff)
mmc: sdhci: Auto-CMD23 support.
Enables Auto-CMD23 support where available (SDHCI 3.0 controllers) Signed-off-by: Andrei Warkentin <andreiw@motorola.com> Tested-by: Arindam Nath <arindam.nath@amd.com> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host/sdhci.c')
-rw-r--r--drivers/mmc/host/sdhci.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index b9ed66307ac..f845fd6a64a 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -857,7 +857,12 @@ static void sdhci_set_transfer_mode(struct sdhci_host *host,
*/
if (!host->mrq->sbc && (host->flags & SDHCI_AUTO_CMD12))
mode |= SDHCI_TRNS_AUTO_CMD12;
+ else if (host->mrq->sbc && (host->flags & SDHCI_AUTO_CMD23)) {
+ mode |= SDHCI_TRNS_AUTO_CMD23;
+ sdhci_writel(host, host->mrq->sbc->arg, SDHCI_ARGUMENT2);
+ }
}
+
if (data->flags & MMC_DATA_READ)
mode |= SDHCI_TRNS_READ;
if (host->flags & SDHCI_REQ_USE_DMA)
@@ -1252,7 +1257,7 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
host->mrq = mrq;
}
- if (mrq->sbc)
+ if (mrq->sbc && !(host->flags & SDHCI_AUTO_CMD23))
sdhci_send_command(host, mrq->sbc);
else
sdhci_send_command(host, mrq->cmd);
@@ -2488,6 +2493,16 @@ int sdhci_add_host(struct sdhci_host *host)
if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12)
host->flags |= SDHCI_AUTO_CMD12;
+ /* Auto-CMD23 stuff only works in ADMA or PIO. */
+ if ((host->version == SDHCI_SPEC_300) &&
+ ((host->flags & SDHCI_USE_ADMA) ||
+ !(host->flags & SDHCI_REQ_USE_DMA))) {
+ host->flags |= SDHCI_AUTO_CMD23;
+ DBG("%s: Auto-CMD23 available\n", mmc_hostname(mmc));
+ } else {
+ DBG("%s: Auto-CMD23 unavailable\n", mmc_hostname(mmc));
+ }
+
/*
* A controller may support 8-bit width, but the board itself
* might not have the pins brought out. Boards that support