diff options
Diffstat (limited to 'drivers/mmc/snps_sdhci.c')
| -rw-r--r-- | drivers/mmc/snps_sdhci.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/mmc/snps_sdhci.c b/drivers/mmc/snps_sdhci.c index dd42e7e7..6c9e91eb 100644 --- a/drivers/mmc/snps_sdhci.c +++ b/drivers/mmc/snps_sdhci.c @@ -13,6 +13,7 @@ #define HS400_DELAY_LANE 24 volatile int DELAY_LANE = 50; +volatile int manual_set_delay = 0; //flag for cmd manual setted DELAY_LANE,non-zero is setted. auto clear in cmd static void sdhci_phy_1_8v_init_no_pull(struct sdhci_host *host) { @@ -154,10 +155,14 @@ void snps_set_uhs_timing(struct sdhci_host *host) { struct mmc *mmc = (struct mmc *)host->mmc; u32 reg; - + int restore_delay; reg = sdhci_readw(host, SDHCI_HOST_CONTROL2); reg &= ~SDHCI_CTRL_UHS_MASK; - + + if(manual_set_delay){ + DELAY_LANE = DELAY_LANE & 0x7f; /*limit bit[0:6]*/ + printf("%s: manual set delay (%d) active \n",host->name,DELAY_LANE); + } switch (mmc->selected_mode) { case UHS_SDR50: case MMC_HS_52: @@ -175,9 +180,13 @@ void snps_set_uhs_timing(struct sdhci_host *host) reg |= SDHCI_CTRL_UHS_SDR104; break; case MMC_HS_400: - DELAY_LANE = HS400_DELAY_LANE; + restore_delay = DELAY_LANE; + if(!manual_set_delay){ /*default not set manual in cmd,when set in cmd,use DELAY_LANE set in cmd*/ + DELAY_LANE = HS400_DELAY_LANE; + } sdhci_phy_1_8v_init(host); reg |= SNPS_SDHCI_CTRL_HS400; + DELAY_LANE = restore_delay; /*restore for other modes*/ break; default: sdhci_phy_3_3v_init(host); @@ -345,7 +354,10 @@ static int snps_sdhci_probe(struct udevice *dev) ret = max_clk; goto err; } - + //get Maximum Base Clock frequency from dts clock-frequency + if(0 == dev_read_u32(dev, "clock-frequency", &max_clk)){ + host->max_clk = max_clk; + } host->mmc = &plat->mmc; host->mmc->dev = dev; host->mmc->priv = host; |