[U-Boot] [PATCH v3 04/24] mmc: omap_hsmmc: set MMC mode in the UHSMS bit field

[Jean-Jacques Hiblot]

Use the timing parameter set in the MMC core to set the
mode in UHSMS  bit field. This is in preparation for
adding HS200 support in omap hsmmc driver.

Signed-off-by: Kishon Vijay Abraham I <kishon at ti.com>
Signed-off-by: Jean-Jacques Hiblot <jjhiblot at ti.com>

---

Changes in v3:
- prefer the usage of the BIT() macro over the construct ( 1 << x )

 arch/arm/include/asm/omap_mmc.h | 12 ++++++++++-
 drivers/mmc/omap_hsmmc.c        | 47 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+), 1 deletion(-)

diff --git a/arch/arm/include/asm/omap_mmc.h b/arch/arm/include/asm/omap_mmc.h
index c4d326d..507435a 100644
--- a/arch/arm/include/asm/omap_mmc.h
+++ b/arch/arm/include/asm/omap_mmc.h
@@ -53,7 +53,8 @@ struct hsmmc {
 	unsigned int sysctl;		/* 0x12C */
 	unsigned int stat;		/* 0x130 */
 	unsigned int ie;		/* 0x134 */
-	unsigned char res4[0x8];
+	unsigned char res4[0x4];
+	unsigned int ac12;		/* 0x13C */
 	unsigned int capa;		/* 0x140 */
 	unsigned char res5[0x10];
 	unsigned int admaes;		/* 0x154 */
@@ -170,6 +171,15 @@ struct omap_hsmmc_plat {
 #define IOV_3V0				3000000
 #define IOV_1V8				1800000
 
+#define AC12_ET				BIT(22)
+#define AC12_UHSMC_MASK			(7 << 16)
+#define AC12_UHSMC_DDR50		(4 << 16)
+#define AC12_UHSMC_SDR104		(3 << 16)
+#define AC12_UHSMC_SDR50		(2 << 16)
+#define AC12_UHSMC_SDR25		(1 << 16)
+#define AC12_UHSMC_SDR12		(0 << 16)
+#define AC12_UHSMC_RES			(0x7 << 16)
+
 /* Driver definitions */
 #define MMCSD_SECTOR_SIZE		512
 #define MMC_CARD			0
diff --git a/drivers/mmc/omap_hsmmc.c b/drivers/mmc/omap_hsmmc.c
index 5141bf6..c6b74a1 100644
--- a/drivers/mmc/omap_hsmmc.c
+++ b/drivers/mmc/omap_hsmmc.c
@@ -76,6 +76,7 @@ struct omap_hsmmc_data {
 #endif
 #if CONFIG_IS_ENABLED(DM_MMC)
 	uint iov;
+	enum bus_mode mode;
 #endif
 	u8 controller_flags;
 #ifndef CONFIG_OMAP34XX
@@ -258,6 +259,48 @@ void mmc_init_stream(struct hsmmc *mmc_base)
 }
 
 #if CONFIG_IS_ENABLED(DM_MMC)
+static void omap_hsmmc_set_timing(struct mmc *mmc)
+{
+	u32 val;
+	struct hsmmc *mmc_base;
+	struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
+
+	mmc_base = priv->base_addr;
+
+	val = readl(&mmc_base->ac12);
+	val &= ~AC12_UHSMC_MASK;
+	priv->mode = mmc->selected_mode;
+
+	switch (priv->mode) {
+	case MMC_HS_200:
+	case UHS_SDR104:
+		val |= AC12_UHSMC_SDR104;
+		break;
+	case UHS_SDR50:
+		val |= AC12_UHSMC_SDR50;
+		break;
+	case MMC_DDR_52:
+	case UHS_DDR50:
+		val |= AC12_UHSMC_DDR50;
+		break;
+	case SD_HS:
+	case MMC_HS_52:
+	case UHS_SDR25:
+		val |= AC12_UHSMC_SDR25;
+		break;
+	case MMC_LEGACY:
+	case MMC_HS:
+	case SD_LEGACY:
+	case UHS_SDR12:
+		val |= AC12_UHSMC_SDR12;
+		break;
+	default:
+		val |= AC12_UHSMC_RES;
+		break;
+	}
+	writel(val, &mmc_base->ac12);
+}
+
 static void omap_hsmmc_conf_bus_power(struct mmc *mmc)
 {
 	struct hsmmc *mmc_base;
@@ -928,6 +971,10 @@ static int omap_hsmmc_set_ios(struct udevice *dev)
 	if (priv->clock != mmc->clock)
 		omap_hsmmc_set_clock(mmc);
 
+#if CONFIG_IS_ENABLED(DM_MMC)
+	if (priv->mode != mmc->selected_mode)
+		omap_hsmmc_set_timing(mmc);
+#endif
 	return 0;
 }
 
-- 
1.9.1