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Commit 8edf6371 authored by Andrei Warkentin's avatar Andrei Warkentin Committed by Chris Ball
Browse files

mmc: sdhci: Auto-CMD23 support. 



Enables Auto-CMD23 support where available (SDHCI 3.0 controllers)

Signed-off-by: default avatarAndrei Warkentin <andreiw@motorola.com>
Tested-by: default avatarArindam Nath <arindam.nath@amd.com>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent f0d89972

drivers/mmc/host/sdhci.c

+16 −1
Original line number Diff line number Diff line
@@ -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

drivers/mmc/host/sdhci.h

+2 −0
Original line number Diff line number Diff line
@@ -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

include/linux/mmc/sdhci.h

+1 −0
Original line number Diff line number Diff line
@@ -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 */