phy: amlogic: Add Amlogic A1 USB2 PHY Driver

This adds support for the USB2 PHY found in the Amlogic A1 SoC Family.

It supports host mode only.

Signed-off-by: Yue Wang <yue.wang@amlogic.com>
Signed-off-by: Hanjie Lin <hanjie.lin@amlogic.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

diff --git a/drivers/phy/amlogic/phy-meson-g12a-usb2.c b/drivers/phy/amlogic/phy-meson-g12a-usb2.c
index cd7ecca..b26e30e 100644 (file)
--- a/drivers/phy/amlogic/phy-meson-g12a-usb2.c
+++ b/drivers/phy/amlogic/phy-meson-g12a-usb2.c
@@ -146,11 +146,17 @@
 #define RESET_COMPLETE_TIME                                    1000
 #define PLL_RESET_COMPLETE_TIME                                        100
 
+enum meson_soc_id {
+       MESON_SOC_G12A  = 0,
+       MESON_SOC_A1,
+};
+
 struct phy_meson_g12a_usb2_priv {
        struct device           *dev;
        struct regmap           *regmap;
        struct clk              *clk;
        struct reset_control    *reset;
+       int                     soc_id;
 };
 
 static const struct regmap_config phy_meson_g12a_usb2_regmap_conf = {
@@ -164,6 +170,7 @@ static int phy_meson_g12a_usb2_init(struct phy *phy)
 {
        struct phy_meson_g12a_usb2_priv *priv = phy_get_drvdata(phy);
        int ret;
+       unsigned int value;
 
        ret = reset_control_reset(priv->reset);
        if (ret)
@@ -192,18 +199,22 @@ static int phy_meson_g12a_usb2_init(struct phy *phy)
                     FIELD_PREP(PHY_CTRL_R17_MPLL_FILTER_PVT2, 2) |
                     FIELD_PREP(PHY_CTRL_R17_MPLL_FILTER_PVT1, 9));
 
-       regmap_write(priv->regmap, PHY_CTRL_R18,
-                    FIELD_PREP(PHY_CTRL_R18_MPLL_LKW_SEL, 1) |
-                    FIELD_PREP(PHY_CTRL_R18_MPLL_LK_W, 9) |
-                    FIELD_PREP(PHY_CTRL_R18_MPLL_LK_S, 0x27) |
-                    FIELD_PREP(PHY_CTRL_R18_MPLL_PFD_GAIN, 1) |
-                    FIELD_PREP(PHY_CTRL_R18_MPLL_ROU, 7) |
-                    FIELD_PREP(PHY_CTRL_R18_MPLL_DATA_SEL, 3) |
-                    FIELD_PREP(PHY_CTRL_R18_MPLL_BIAS_ADJ, 1) |
-                    FIELD_PREP(PHY_CTRL_R18_MPLL_BB_MODE, 0) |
-                    FIELD_PREP(PHY_CTRL_R18_MPLL_ALPHA, 3) |
-                    FIELD_PREP(PHY_CTRL_R18_MPLL_ADJ_LDO, 1) |
-                    PHY_CTRL_R18_MPLL_ACG_RANGE);
+       value = FIELD_PREP(PHY_CTRL_R18_MPLL_LKW_SEL, 1) |
+               FIELD_PREP(PHY_CTRL_R18_MPLL_LK_W, 9) |
+               FIELD_PREP(PHY_CTRL_R18_MPLL_LK_S, 0x27) |
+               FIELD_PREP(PHY_CTRL_R18_MPLL_PFD_GAIN, 1) |
+               FIELD_PREP(PHY_CTRL_R18_MPLL_ROU, 7) |
+               FIELD_PREP(PHY_CTRL_R18_MPLL_DATA_SEL, 3) |
+               FIELD_PREP(PHY_CTRL_R18_MPLL_BIAS_ADJ, 1) |
+               FIELD_PREP(PHY_CTRL_R18_MPLL_BB_MODE, 0) |
+               FIELD_PREP(PHY_CTRL_R18_MPLL_ALPHA, 3) |
+               FIELD_PREP(PHY_CTRL_R18_MPLL_ADJ_LDO, 1) |
+               PHY_CTRL_R18_MPLL_ACG_RANGE;
+
+       if (priv->soc_id == MESON_SOC_A1)
+               value |= PHY_CTRL_R18_MPLL_DCO_CLK_SEL;
+
+       regmap_write(priv->regmap, PHY_CTRL_R18, value);
 
        udelay(PLL_RESET_COMPLETE_TIME);
 
@@ -227,13 +238,24 @@ static int phy_meson_g12a_usb2_init(struct phy *phy)
                     FIELD_PREP(PHY_CTRL_R20_USB2_BGR_VREF_4_0, 0) |
                     FIELD_PREP(PHY_CTRL_R20_USB2_BGR_DBG_1_0, 0));
 
-       regmap_write(priv->regmap, PHY_CTRL_R4,
-                    FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_7_0, 0xf) |
-                    FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_15_8, 0xf) |
-                    FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_23_16, 0xf) |
-                    PHY_CTRL_R4_TEST_BYPASS_MODE_EN |
-                    FIELD_PREP(PHY_CTRL_R4_I_C2L_BIAS_TRIM_1_0, 0) |
-                    FIELD_PREP(PHY_CTRL_R4_I_C2L_BIAS_TRIM_3_2, 0));
+       if (priv->soc_id == MESON_SOC_G12A)
+               regmap_write(priv->regmap, PHY_CTRL_R4,
+                            FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_7_0, 0xf) |
+                            FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_15_8, 0xf) |
+                            FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_23_16, 0xf) |
+                            PHY_CTRL_R4_TEST_BYPASS_MODE_EN |
+                            FIELD_PREP(PHY_CTRL_R4_I_C2L_BIAS_TRIM_1_0, 0) |
+                            FIELD_PREP(PHY_CTRL_R4_I_C2L_BIAS_TRIM_3_2, 0));
+       else if (priv->soc_id == MESON_SOC_A1) {
+               regmap_write(priv->regmap, PHY_CTRL_R21,
+                            PHY_CTRL_R21_USB2_CAL_ACK_EN |
+                            PHY_CTRL_R21_USB2_TX_STRG_PD |
+                            FIELD_PREP(PHY_CTRL_R21_USB2_OTG_ACA_TRIM_1_0, 2));
+
+               /* Analog Settings */
+               regmap_write(priv->regmap, PHY_CTRL_R13,
+                            FIELD_PREP(PHY_CTRL_R13_MIN_COUNT_FOR_SYNC_DET, 7));
+       }
 
        /* Tuning Disconnect Threshold */
        regmap_write(priv->regmap, PHY_CTRL_R3,
@@ -241,11 +263,13 @@ static int phy_meson_g12a_usb2_init(struct phy *phy)
                     FIELD_PREP(PHY_CTRL_R3_HSDIC_REF, 1) |
                     FIELD_PREP(PHY_CTRL_R3_DISC_THRESH, 3));
 
-       /* Analog Settings */
-       regmap_write(priv->regmap, PHY_CTRL_R14, 0);
-       regmap_write(priv->regmap, PHY_CTRL_R13,
-                    PHY_CTRL_R13_UPDATE_PMA_SIGNALS |
-                    FIELD_PREP(PHY_CTRL_R13_MIN_COUNT_FOR_SYNC_DET, 7));
+       if (priv->soc_id == MESON_SOC_G12A) {
+               /* Analog Settings */
+               regmap_write(priv->regmap, PHY_CTRL_R14, 0);
+               regmap_write(priv->regmap, PHY_CTRL_R13,
+                            PHY_CTRL_R13_UPDATE_PMA_SIGNALS |
+                            FIELD_PREP(PHY_CTRL_R13_MIN_COUNT_FOR_SYNC_DET, 7));
+       }
 
        return 0;
 }
@@ -286,6 +310,8 @@ static int phy_meson_g12a_usb2_probe(struct platform_device *pdev)
        if (IS_ERR(base))
                return PTR_ERR(base);
 
+       priv->soc_id = (enum meson_soc_id)of_device_get_match_data(&pdev->dev);
+
        priv->regmap = devm_regmap_init_mmio(dev, base,
                                             &phy_meson_g12a_usb2_regmap_conf);
        if (IS_ERR(priv->regmap))
@@ -321,8 +347,15 @@ static int phy_meson_g12a_usb2_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id phy_meson_g12a_usb2_of_match[] = {
-       { .compatible = "amlogic,g12a-usb2-phy", },
-       { },
+       {
+               .compatible = "amlogic,g12a-usb2-phy",
+               .data = (void *)MESON_SOC_G12A,
+       },
+       {
+               .compatible = "amlogic,a1-usb2-phy",
+               .data = (void *)MESON_SOC_A1,
+       },
+       { /* Sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, phy_meson_g12a_usb2_of_match);