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mmc: sdhci-of-dwcmshc: fix some config for rk3588

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1. Disable interface clock at initial state.
2. Set the default tx dll tap value to 0xA for hs400.
3. Configure the parameters of enhanced strobe before enable HS400ES.
4. Set the default cmd dll tap value to 0x8.

Signed-off-by: Yifeng Zhao <yifeng.zhao@rock-chips.com>
Change-Id: I82f09c4d5f5f3b79f71b61fbe62eec6e8d6a7230
This commit is contained in:
Yifeng Zhao
2021-12-07 15:03:34 +08:00
parent e1f0e15a08
commit bed242ece6
1 changed files with 21 additions and 3 deletions
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24
drivers/mmc/host/sdhci-of-dwcmshc.c
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@@ -46,12 +46,15 @@
#define DWCMSHC_EMMC_DLL_DLYENA BIT(27)
#define DLL_TXCLK_TAPNUM_DEFAULT 0x10
#define DLL_TXCLK_TAPNUM_90_DEGREES 0x8
#define DLL_TXCLK_TAPNUM_90_DEGREES 0xA
#define DLL_TXCLK_TAPNUM_FROM_SW BIT(24)
#define DLL_TXCLK_NO_INVERTER BIT(29)
#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_RXCLK_NO_INVERTER BIT(29)
@@ -193,8 +196,11 @@ static void dwcmshc_rk_set_clock(struct sdhci_host *host, unsigned int clock)
host->mmc->actual_clock = 0;
if (clock == 0)
if (clock == 0) {
/* Disable interface clock at initial state. */
sdhci_set_clock(host, clock);
return;
}
/* Rockchip platform only support 375KHz for identify mode */
if (clock <= 400000)
@@ -217,6 +223,15 @@ static void dwcmshc_rk_set_clock(struct sdhci_host *host, unsigned int clock)
sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_RXCLK);
sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_TXCLK);
sdhci_writel(host, 0, DECMSHC_EMMC_DLL_CMDOUT);
/*
* 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;
}
@@ -259,7 +274,10 @@ static void dwcmshc_rk_set_clock(struct sdhci_host *host, unsigned int clock)
txclk_tapnum = DLL_TXCLK_TAPNUM_90_DEGREES;
extra = DLL_CMDOUT_SRC_CLK_NEG |
DLL_CMDOUT_EN_SRC_CLK_NEG;
DLL_CMDOUT_EN_SRC_CLK_NEG |
DWCMSHC_EMMC_DLL_DLYENA |
DLL_CMDOUT_TAPNUM_90_DEGREES |
DLL_CMDOUT_TAPNUM_FROM_SW;
sdhci_writel(host, extra, DECMSHC_EMMC_DLL_CMDOUT);
}