diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/fsl_esdhc.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c index 4528345c67..03c6743ae8 100644 --- a/drivers/mmc/fsl_esdhc.c +++ b/drivers/mmc/fsl_esdhc.c @@ -662,6 +662,7 @@ static int esdhc_change_pinstate(struct udevice *dev) break; case UHS_SDR104: case MMC_HS_200: + case MMC_HS_400: ret = pinctrl_select_state(dev, "state_200mhz"); break; default: @@ -689,6 +690,33 @@ static void esdhc_reset_tuning(struct mmc *mmc) } } +static void esdhc_set_strobe_dll(struct mmc *mmc) +{ + struct fsl_esdhc_priv *priv = dev_get_priv(mmc->dev); + struct fsl_esdhc *regs = priv->esdhc_regs; + u32 val; + + if (priv->clock > ESDHC_STROBE_DLL_CLK_FREQ) { + writel(ESDHC_STROBE_DLL_CTRL_RESET, ®s->strobe_dllctrl); + + /* + * enable strobe dll ctrl and adjust the delay target + * for the uSDHC loopback read clock + */ + val = ESDHC_STROBE_DLL_CTRL_ENABLE | + (priv->strobe_dll_delay_target << + ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_SHIFT); + writel(val, ®s->strobe_dllctrl); + /* wait 1us to make sure strobe dll status register stable */ + mdelay(1); + val = readl(®s->strobe_dllstat); + if (!(val & ESDHC_STROBE_DLL_STS_REF_LOCK)) + pr_warn("HS400 strobe DLL status REF not lock!\n"); + if (!(val & ESDHC_STROBE_DLL_STS_SLV_LOCK)) + pr_warn("HS400 strobe DLL status SLV not lock!\n"); + } +} + static int esdhc_set_timing(struct mmc *mmc) { struct fsl_esdhc_priv *priv = dev_get_priv(mmc->dev); @@ -702,6 +730,12 @@ static int esdhc_set_timing(struct mmc *mmc) case MMC_LEGACY: case SD_LEGACY: esdhc_reset_tuning(mmc); + writel(mixctrl, ®s->mixctrl); + break; + case MMC_HS_400: + mixctrl |= MIX_CTRL_DDREN | MIX_CTRL_HS400_EN; + writel(mixctrl, ®s->mixctrl); + esdhc_set_strobe_dll(mmc); break; case MMC_HS: case MMC_HS_52: @@ -1438,7 +1472,7 @@ static int fsl_esdhc_probe(struct udevice *dev) #endif if (fdt_get_property(fdt, node, "no-1-8-v", NULL)) - priv->caps &= ~(UHS_CAPS | MMC_MODE_HS200); + priv->caps &= ~(UHS_CAPS | MMC_MODE_HS200 | MMC_MODE_HS400); /* * TODO: |