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Commit d95c8222 authored by Venkat Gopalakrishnan's avatar Venkat Gopalakrishnan
Browse files

mmc: sdhci-msm: fix register address change for DDR_CONFIG 



The power on reset value of DDR_CONFIG register was fixed in
controller revision (major - 0x1 and minor > 0x49) to address
the default rclk delay value after characterization. The register
offset for this register was also changed starting from this
revision. Make necessary changes to account for this.

Change-Id: I4e4a87aebd24e5669b03a914c6e0f4b469f5ec7b
Signed-off-by: default avatarVenkat Gopalakrishnan <venkatg@codeaurora.org>
parent 8ae65e26

drivers/mmc/host/sdhci-msm.c

+14 −3
Original line number Diff line number Diff line
@@ -171,6 +171,8 @@ 
#define DDR_CONFIG_POR_VAL		0x80040853

#define DDR_CONFIG_PRG_RCLK_DLY_MASK	0x1FF

#define DDR_CONFIG_PRG_RCLK_DLY		115

#define CORE_DDR_CONFIG_2		0x1BC

#define DDR_CONFIG_2_POR_VAL		0x80040873



#define MSM_MMC_DEFAULT_CPU_DMA_LATENCY 200 /* usecs */
@@ -775,9 +777,15 @@ static int sdhci_msm_cm_dll_sdc4_calibration(struct sdhci_host *host) 
	 * Reprogramming the value in case it might have been modified by

	 * bootloaders.

	 */

	ddr_config = DDR_CONFIG_POR_VAL & ~DDR_CONFIG_PRG_RCLK_DLY_MASK;

	if (msm_host->rclk_delay_fix) {

		writel_relaxed(DDR_CONFIG_2_POR_VAL,

				host->ioaddr + CORE_DDR_CONFIG_2);

	} else {

		ddr_config = DDR_CONFIG_POR_VAL &

				~DDR_CONFIG_PRG_RCLK_DLY_MASK;

		ddr_config |= DDR_CONFIG_PRG_RCLK_DLY;

		writel_relaxed(ddr_config, host->ioaddr + CORE_DDR_CONFIG);

	}



	if (msm_host->enhanced_strobe)

		writel_relaxed((readl_relaxed(host->ioaddr + CORE_DDR_200_CFG)
@@ -3051,6 +3059,9 @@ static void sdhci_set_default_hw_caps(struct sdhci_msm_host *msm_host, 
	if ((major == 1) && ((minor == 0x42) || (minor == 0x46) ||

				(minor == 0x49)))

		msm_host->use_14lpp_dll = true;



	if ((major == 1) && (minor >= 0x49))

		msm_host->rclk_delay_fix = true;

	/*

	 * Mask 64-bit support for controller with 32-bit address bus so that

	 * smaller descriptor size will be used and improve memory consumption.

drivers/mmc/host/sdhci-msm.h

+1 −0
Original line number Diff line number Diff line
@@ -157,6 +157,7 @@ struct sdhci_msm_host { 
	bool use_updated_dll_reset;

	bool use_14lpp_dll;

	bool enhanced_strobe;

	bool rclk_delay_fix;

	u32 caps_0;

	struct sdhci_msm_ice_data ice;

	u32 ice_clk_rate;