mmc: sdhci-sprd: Add PHY DLL delay configuration
Set the PHY DLL delay for each timing mode, which is used to sample the clock accurately and make the clock more stable. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
parent
c8ff5351b5
commit
5f2f4e0da2
|
@ -29,6 +29,8 @@
|
|||
#define SDHCI_SPRD_DLL_INIT_COUNT 0xc00
|
||||
#define SDHCI_SPRD_DLL_PHASE_INTERNAL 0x3
|
||||
|
||||
#define SDHCI_SPRD_REG_32_DLL_DLY 0x204
|
||||
|
||||
#define SDHCI_SPRD_REG_32_DLL_DLY_OFFSET 0x208
|
||||
#define SDHCIBSPRD_IT_WR_DLY_INV BIT(5)
|
||||
#define SDHCI_SPRD_BIT_CMD_DLY_INV BIT(13)
|
||||
|
@ -72,6 +74,24 @@ struct sdhci_sprd_host {
|
|||
struct clk *clk_2x_enable;
|
||||
u32 base_rate;
|
||||
int flags; /* backup of host attribute */
|
||||
u32 phy_delay[MMC_TIMING_MMC_HS400 + 2];
|
||||
};
|
||||
|
||||
struct sdhci_sprd_phy_cfg {
|
||||
const char *property;
|
||||
u8 timing;
|
||||
};
|
||||
|
||||
static const struct sdhci_sprd_phy_cfg sdhci_sprd_phy_cfgs[] = {
|
||||
{ "sprd,phy-delay-legacy", MMC_TIMING_LEGACY, },
|
||||
{ "sprd,phy-delay-sd-highspeed", MMC_TIMING_SD_HS, },
|
||||
{ "sprd,phy-delay-sd-uhs-sdr50", MMC_TIMING_UHS_SDR50, },
|
||||
{ "sprd,phy-delay-sd-uhs-sdr104", MMC_TIMING_UHS_SDR104, },
|
||||
{ "sprd,phy-delay-mmc-highspeed", MMC_TIMING_MMC_HS, },
|
||||
{ "sprd,phy-delay-mmc-ddr52", MMC_TIMING_MMC_DDR52, },
|
||||
{ "sprd,phy-delay-mmc-hs200", MMC_TIMING_MMC_HS200, },
|
||||
{ "sprd,phy-delay-mmc-hs400", MMC_TIMING_MMC_HS400, },
|
||||
{ "sprd,phy-delay-mmc-hs400es", MMC_TIMING_MMC_HS400 + 1, },
|
||||
};
|
||||
|
||||
#define TO_SPRD_HOST(host) sdhci_pltfm_priv(sdhci_priv(host))
|
||||
|
@ -276,6 +296,9 @@ static unsigned int sdhci_sprd_get_min_clock(struct sdhci_host *host)
|
|||
static void sdhci_sprd_set_uhs_signaling(struct sdhci_host *host,
|
||||
unsigned int timing)
|
||||
{
|
||||
struct sdhci_sprd_host *sprd_host = TO_SPRD_HOST(host);
|
||||
struct mmc_host *mmc = host->mmc;
|
||||
u32 *p = sprd_host->phy_delay;
|
||||
u16 ctrl_2;
|
||||
|
||||
if (timing == host->timing)
|
||||
|
@ -314,6 +337,9 @@ static void sdhci_sprd_set_uhs_signaling(struct sdhci_host *host,
|
|||
}
|
||||
|
||||
sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
|
||||
|
||||
if (!mmc->ios.enhanced_strobe)
|
||||
sdhci_writel(host, p[timing], SDHCI_SPRD_REG_32_DLL_DLY);
|
||||
}
|
||||
|
||||
static void sdhci_sprd_hw_reset(struct sdhci_host *host)
|
||||
|
@ -381,6 +407,8 @@ static void sdhci_sprd_hs400_enhanced_strobe(struct mmc_host *mmc,
|
|||
struct mmc_ios *ios)
|
||||
{
|
||||
struct sdhci_host *host = mmc_priv(mmc);
|
||||
struct sdhci_sprd_host *sprd_host = TO_SPRD_HOST(host);
|
||||
u32 *p = sprd_host->phy_delay;
|
||||
u16 ctrl_2;
|
||||
|
||||
if (!ios->enhanced_strobe)
|
||||
|
@ -395,6 +423,28 @@ static void sdhci_sprd_hs400_enhanced_strobe(struct mmc_host *mmc,
|
|||
sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
|
||||
|
||||
sdhci_sprd_sd_clk_on(host);
|
||||
|
||||
/* Set the PHY DLL delay value for HS400 enhanced strobe mode */
|
||||
sdhci_writel(host, p[MMC_TIMING_MMC_HS400 + 1],
|
||||
SDHCI_SPRD_REG_32_DLL_DLY);
|
||||
}
|
||||
|
||||
static void sdhci_sprd_phy_param_parse(struct sdhci_sprd_host *sprd_host,
|
||||
struct device_node *np)
|
||||
{
|
||||
u32 *p = sprd_host->phy_delay;
|
||||
int ret, i, index;
|
||||
u32 val[4];
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(sdhci_sprd_phy_cfgs); i++) {
|
||||
ret = of_property_read_u32_array(np,
|
||||
sdhci_sprd_phy_cfgs[i].property, val, 4);
|
||||
if (ret)
|
||||
continue;
|
||||
|
||||
index = sdhci_sprd_phy_cfgs[i].timing;
|
||||
p[index] = val[0] | (val[1] << 8) | (val[2] << 16) | (val[3] << 24);
|
||||
}
|
||||
}
|
||||
|
||||
static const struct sdhci_pltfm_data sdhci_sprd_pdata = {
|
||||
|
@ -428,6 +478,7 @@ static int sdhci_sprd_probe(struct platform_device *pdev)
|
|||
goto pltfm_free;
|
||||
|
||||
sprd_host = TO_SPRD_HOST(host);
|
||||
sdhci_sprd_phy_param_parse(sprd_host, pdev->dev.of_node);
|
||||
|
||||
clk = devm_clk_get(&pdev->dev, "sdio");
|
||||
if (IS_ERR(clk)) {
|
||||
|
|
Loading…
Reference in New Issue
Block a user