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 | |
| 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>
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 17 | ||||
| -rw-r--r-- | drivers/mmc/host/sdhci.h | 2 | ||||
| -rw-r--r-- | include/linux/mmc/sdhci.h | 1 |
3 files changed, 19 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 diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 2c3fbc5a4c0..745c42fa41e 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -25,6 +25,7 @@ */ #define SDHCI_DMA_ADDRESS 0x00 +#define SDHCI_ARGUMENT2 SDHCI_DMA_ADDRESS #define SDHCI_BLOCK_SIZE 0x04 #define SDHCI_MAKE_BLKSZ(dma, blksz) (((dma & 0x7) << 12) | (blksz & 0xFFF)) @@ -37,6 +38,7 @@ #define SDHCI_TRNS_DMA 0x01 #define SDHCI_TRNS_BLK_CNT_EN 0x02 #define SDHCI_TRNS_AUTO_CMD12 0x04 +#define SDHCI_TRNS_AUTO_CMD23 0x08 #define SDHCI_TRNS_READ 0x10 #define SDHCI_TRNS_MULTI 0x20 diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h index 73e27ba51e9..6a68c4eb4e4 100644 --- a/include/linux/mmc/sdhci.h +++ b/include/linux/mmc/sdhci.h @@ -114,6 +114,7 @@ struct sdhci_host { #define SDHCI_SDR50_NEEDS_TUNING (1<<4) /* SDR50 needs tuning */ #define SDHCI_NEEDS_RETUNING (1<<5) /* Host needs retuning */ #define SDHCI_AUTO_CMD12 (1<<6) /* Auto CMD12 support */ +#define SDHCI_AUTO_CMD23 (1<<7) /* Auto CMD23 support */ unsigned int version; /* SDHCI spec. version */ |