diff options
| author | Andrei Warkentin <andreiw@motorola.com> | 2011-05-23 15:06:39 -0500 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2011-05-25 16:51:40 -0400 |
| commit | 8edf63710bd43e62d59bfe017df542fa0713bbb3 (patch) | |
| tree | 98641f28d6d3ce2ca5c021de20f8dec35fb8affe /drivers/mmc/host/sdhci.c | |
| parent | f0d89972b01798cf9d245dfa1cacfa0ee78a3593 (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.c | 17 |
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 |