[RFC/RFT 4/5] phy: exynos5-usbdrd: PIPE3 tune signal

[Anand Moon]

Tune USB3.0 (PIPE3) PHY TX signal for high and supper
speed data transfer.

Signed-off-by: Anand Moon <linux.am...@gmail.com>
---
 drivers/phy/samsung/phy-exynos5-usbdrd.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/drivers/phy/samsung/phy-exynos5-usbdrd.c 
b/drivers/phy/samsung/phy-exynos5-usbdrd.c
index 54a513ca15e4..4f16c4f82ae5 100644
--- a/drivers/phy/samsung/phy-exynos5-usbdrd.c
+++ b/drivers/phy/samsung/phy-exynos5-usbdrd.c
@@ -124,8 +124,10 @@
 
 #define EXYNOS5_DRD_PHYPARAM1                  0x20
 
-#define PHYPARAM1_PCS_TXDEEMPH_MASK            (0x1f << 0)
-#define PHYPARAM1_PCS_TXDEEMPH                 (0x1c)
+#define PHYPARAM1_TX0_TERM_OFFSET(x)           __set(x, 30, 26)
+#define PHYPARAM1_TX_SWING_FULL(x)             __set(x, 18, 12)
+#define PHYPRAAM1_PCS_TX_DEEMPH_6DB(x)         __set(x, 11, 6)
+#define PHYPRAAM1_PCS_TX_DEEMPH_3P5DB(x)       __set(x, 5, 0)
 
 #define EXYNOS5_DRD_PHYTERM                    0x24
 
@@ -360,10 +362,16 @@ static void exynos5_usbdrd_pipe3_init(struct 
exynos5_usbdrd_phy *phy_drd)
 {
        u32 reg;
 
-       reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1);
        /* Set Tx De-Emphasis level */
-       reg &= ~PHYPARAM1_PCS_TXDEEMPH_MASK;
-       reg |=  PHYPARAM1_PCS_TXDEEMPH;
+       reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1);
+               /* Transmitter Termination Offset */
+       reg |=  PHYPARAM1_TX0_TERM_OFFSET(0x5) |
+               /* Tx Amplitude (Full Swing mode) */
+               PHYPARAM1_TX_SWING_FULL(0x3F) |
+               /* Tx De-Emphasis at 6 dB */
+               PHYPRAAM1_PCS_TX_DEEMPH_6DB(0x20) |
+               /* Tx De-Emphasis at 3.5 dB */
+               PHYPRAAM1_PCS_TX_DEEMPH_3P5DB(0x15);
        writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1);
 
        reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST);
-- 
2.22.0