diff options
| -rw-r--r-- | drivers/mmc/rockchip_sdhci.c | 64 |
1 files changed, 58 insertions, 6 deletions
diff --git a/drivers/mmc/rockchip_sdhci.c b/drivers/mmc/rockchip_sdhci.c index f4d5a59036a..f3f9d83ba36 100644 --- a/drivers/mmc/rockchip_sdhci.c +++ b/drivers/mmc/rockchip_sdhci.c @@ -22,6 +22,8 @@ #include <asm/arch-rockchip/clock.h> #include <asm/arch-rockchip/hardware.h> +/* DWCMSHC specific Mode Select value */ +#define DWCMSHC_CTRL_HS400 0x7 /* 400KHz is max freq for card ID etc. Use that as min */ #define EMMC_MIN_FREQ 400000 #define KHz (1000) @@ -45,6 +47,14 @@ #define ARASAN_VENDOR_REGISTER 0x78 #define ARASAN_VENDOR_ENHANCED_STROBE BIT(0) +/* DWC IP vendor area 1 pointer */ +#define DWCMSHC_P_VENDOR_AREA1 0xe8 +#define DWCMSHC_AREA1_MASK GENMASK(11, 0) +/* Offset inside the vendor area 1 */ +#define DWCMSHC_EMMC_CONTROL 0x2c +#define DWCMSHC_CARD_IS_EMMC BIT(0) +#define DWCMSHC_ENHANCED_STROBE BIT(8) + /* Rockchip specific Registers */ #define DWCMSHC_EMMC_DLL_CTRL 0x800 #define DWCMSHC_EMMC_DLL_CTRL_RESET BIT(1) @@ -60,8 +70,14 @@ #define DWCMSHC_EMMC_DLL_INC_VALUE 2 #define DWCMSHC_EMMC_DLL_INC 8 #define DWCMSHC_EMMC_DLL_DLYENA BIT(27) -#define DLL_TXCLK_TAPNUM_DEFAULT 0x10 -#define DLL_STRBIN_TAPNUM_DEFAULT 0x3 +#define DLL_TXCLK_TAPNUM_DEFAULT 0xA + +#define DLL_STRBIN_TAPNUM_DEFAULT 0x8 +#define DLL_STRBIN_TAPNUM_FROM_SW BIT(24) +#define DLL_STRBIN_DELAY_NUM_SEL BIT(26) +#define DLL_STRBIN_DELAY_NUM_OFFSET 16 +#define DLL_STRBIN_DELAY_NUM_DEFAULT 0x16 + #define DLL_TXCLK_TAPNUM_FROM_SW BIT(24) #define DWCMSHC_EMMC_DLL_LOCKED BIT(8) #define DWCMSHC_EMMC_DLL_TIMEOUT BIT(9) @@ -327,7 +343,8 @@ static int rk3568_sdhci_emmc_set_clock(struct sdhci_host *host, unsigned int clo sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_TXCLK); extra = DWCMSHC_EMMC_DLL_DLYENA | - DLL_STRBIN_TAPNUM_DEFAULT; + DLL_STRBIN_TAPNUM_DEFAULT | + DLL_STRBIN_TAPNUM_FROM_SW; sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_STRBIN); } else { /* reset the clock phase when the frequency is lower than 100MHz */ @@ -335,7 +352,15 @@ static int rk3568_sdhci_emmc_set_clock(struct sdhci_host *host, unsigned int clo extra = DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL; sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK); sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_TXCLK); - sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_STRBIN); + /* + * Before switching to hs400es mode, the driver will enable + * enhanced strobe first. PHY needs to configure the parameters + * of enhanced strobe first. + */ + extra = DWCMSHC_EMMC_DLL_DLYENA | + DLL_STRBIN_DELAY_NUM_SEL | + DLL_STRBIN_DELAY_NUM_DEFAULT << DLL_STRBIN_DELAY_NUM_OFFSET; + sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_STRBIN); } return 0; @@ -346,11 +371,30 @@ static int rk3568_emmc_get_phy(struct udevice *dev) return 0; } +static int rk3568_sdhci_set_enhanced_strobe(struct sdhci_host *host) +{ + struct mmc *mmc = host->mmc; + u32 vendor; + int reg; + + reg = (sdhci_readl(host, DWCMSHC_P_VENDOR_AREA1) & DWCMSHC_AREA1_MASK) + + DWCMSHC_EMMC_CONTROL; + + vendor = sdhci_readl(host, reg); + if (mmc->selected_mode == MMC_HS_400_ES) + vendor |= DWCMSHC_ENHANCED_STROBE; + else + vendor &= ~DWCMSHC_ENHANCED_STROBE; + sdhci_writel(host, vendor, reg); + + return 0; +} + static int rk3568_sdhci_set_ios_post(struct sdhci_host *host) { struct mmc *mmc = host->mmc; uint clock = mmc->tran_speed; - u32 reg; + u32 reg, vendor_reg; if (!clock) clock = mmc->clock; @@ -360,8 +404,15 @@ static int rk3568_sdhci_set_ios_post(struct sdhci_host *host) if (mmc->selected_mode == MMC_HS_400 || mmc->selected_mode == MMC_HS_400_ES) { reg = sdhci_readw(host, SDHCI_HOST_CONTROL2); reg &= ~SDHCI_CTRL_UHS_MASK; - reg |= SDHCI_CTRL_HS400; + reg |= DWCMSHC_CTRL_HS400; sdhci_writew(host, reg, SDHCI_HOST_CONTROL2); + + vendor_reg = (sdhci_readl(host, DWCMSHC_P_VENDOR_AREA1) & DWCMSHC_AREA1_MASK) + + DWCMSHC_EMMC_CONTROL; + /* set CARD_IS_EMMC bit to enable Data Strobe for HS400 */ + reg = sdhci_readw(host, vendor_reg); + reg |= DWCMSHC_CARD_IS_EMMC; + sdhci_writew(host, reg, vendor_reg); } else { sdhci_set_uhs_timing(host); } @@ -554,6 +605,7 @@ static const struct sdhci_data rk3568_data = { .get_phy = rk3568_emmc_get_phy, .emmc_phy_init = rk3568_emmc_phy_init, .set_ios_post = rk3568_sdhci_set_ios_post, + .set_enhanced_strobe = rk3568_sdhci_set_enhanced_strobe, }; static const struct udevice_id sdhci_ids[] = { |