phy: phy-mtk-tphy: add properties for eye diagram test

Add properties for Eye diagram test of HQA which sometimes need
adjust some parameters of u2phy

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c b/drivers/phy/mediatek/phy-mtk-tphy.c
index b962339074ba74cdef7577a6f23212040663428a..9ab6f2e73c58ca1e4e5bc2655e5dd9be53564815 100644 (file)
--- a/drivers/phy/mediatek/phy-mtk-tphy.c
+++ b/drivers/phy/mediatek/phy-mtk-tphy.c
@@ -42,6 +42,12 @@
 #define PA0_RG_U2PLL_FORCE_ON          BIT(15)
 #define PA0_RG_USB20_INTR_EN           BIT(5)
 
+#define U3P_USBPHYACR1         0x004
+#define PA1_RG_VRT_SEL                 GENMASK(14, 12)
+#define PA1_RG_VRT_SEL_VAL(x)  ((0x7 & (x)) << 12)
+#define PA1_RG_TERM_SEL                GENMASK(10, 8)
+#define PA1_RG_TERM_SEL_VAL(x) ((0x7 & (x)) << 8)
+
 #define U3P_USBPHYACR2         0x008
 #define PA2_RG_SIF_U2PLL_FORCE_EN      BIT(18)
 
@@ -288,6 +294,9 @@ struct mtk_phy_instance {
        struct clk *ref_clk;    /* reference clock of anolog phy */
        u32 index;
        u8 type;
+       int eye_src;
+       int eye_vrt;
+       int eye_term;
 };
 
 struct mtk_tphy {
@@ -312,6 +321,10 @@ static void hs_slew_rate_calibrate(struct mtk_tphy *tphy,
        int fm_out;
        u32 tmp;
 
+       /* use force value */
+       if (instance->eye_src)
+               return;
+
        /* enable USB ring oscillator */
        tmp = readl(com + U3P_USBPHYACR5);
        tmp |= PA5_RG_U2_HSTX_SRCAL_EN;
@@ -818,6 +831,52 @@ static void phy_v2_banks_init(struct mtk_tphy *tphy,
        }
 }
 
+static void phy_parse_property(struct mtk_tphy *tphy,
+                               struct mtk_phy_instance *instance)
+{
+       struct device *dev = &instance->phy->dev;
+
+       if (instance->type != PHY_TYPE_USB2)
+               return;
+
+       device_property_read_u32(dev, "mediatek,eye-src",
+                                &instance->eye_src);
+       device_property_read_u32(dev, "mediatek,eye-vrt",
+                                &instance->eye_vrt);
+       device_property_read_u32(dev, "mediatek,eye-term",
+                                &instance->eye_term);
+}
+
+static void u2_phy_props_set(struct mtk_tphy *tphy,
+                            struct mtk_phy_instance *instance)
+{
+       struct u2phy_banks *u2_banks = &instance->u2_banks;
+       void __iomem *com = u2_banks->com;
+       u32 tmp;
+
+
+       if (instance->eye_src) {
+               tmp = readl(com + U3P_USBPHYACR5);
+               tmp &= ~PA5_RG_U2_HSTX_SRCTRL;
+               tmp |= PA5_RG_U2_HSTX_SRCTRL_VAL(instance->eye_src);
+               writel(tmp, com + U3P_USBPHYACR5);
+       }
+
+       if (instance->eye_vrt) {
+               tmp = readl(com + U3P_USBPHYACR1);
+               tmp &= ~PA1_RG_VRT_SEL;
+               tmp |= PA1_RG_VRT_SEL_VAL(instance->eye_vrt);
+               writel(tmp, com + U3P_USBPHYACR1);
+       }
+
+       if (instance->eye_term) {
+               tmp = readl(com + U3P_USBPHYACR1);
+               tmp &= ~PA1_RG_TERM_SEL;
+               tmp |= PA1_RG_TERM_SEL_VAL(instance->eye_term);
+               writel(tmp, com + U3P_USBPHYACR1);
+       }
+}
+
 static int mtk_phy_init(struct phy *phy)
 {
        struct mtk_phy_instance *instance = phy_get_drvdata(phy);
@@ -839,6 +898,7 @@ static int mtk_phy_init(struct phy *phy)
        switch (instance->type) {
        case PHY_TYPE_USB2:
                u2_phy_instance_init(tphy, instance);
+               u2_phy_props_set(tphy, instance);
                break;
        case PHY_TYPE_USB3:
                u3_phy_instance_init(tphy, instance);
@@ -951,6 +1011,8 @@ static struct phy *mtk_phy_xlate(struct device *dev,
                return ERR_PTR(-EINVAL);
        }
 
+       phy_parse_property(tphy, instance);
+
        return instance->phy;
 }