phy: phy-mt65xx-usb3: add support for mt2701 platform

Add a new OF device ID for mt2701

Some register settings to avoid RX sensitivity level degradation
which may arise on mt8173 platform are separated from other
platforms.

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

2 files changed, 54 insertions, 28 deletions

diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 447cb7c1a18d..f6ff76ec89dc 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -219,9 +219,8 @@ config PHY_MT65XX_USB3
         depends on ARCH_MEDIATEK && OF
         select GENERIC_PHY
         help
-          Say 'Y' here to add support for Mediatek USB3.0 PHY driver
-          for mt65xx SoCs. it supports two usb2.0 ports and
-          one usb3.0 port.
+          Say 'Y' here to add support for Mediatek USB3.0 PHY driver,
+          it supports multiple usb2.0 and usb3.0 ports.
 
 config PHY_HI6220_USB
         tristate "hi6220 USB PHY support"
diff --git a/drivers/phy/phy-mt65xx-usb3.c b/drivers/phy/phy-mt65xx-usb3.c
index c0e7b4b0cf5c..4d85e730ccab 100644
--- a/drivers/phy/phy-mt65xx-usb3.c
+++ b/drivers/phy/phy-mt65xx-usb3.c
@@ -134,6 +134,11 @@
 #define U3P_SR_COEF_DIVISOR     1000
 #define U3P_FM_DET_CYCLE_CNT    1024
 
+struct mt65xx_phy_pdata {
+        /* avoid RX sensitivity level degradation only for mt8173 */
+        bool avoid_rx_sen_degradation;
+};
+
 struct mt65xx_phy_instance {
         struct phy *phy;
         void __iomem *port_base;
@@ -145,6 +150,7 @@ struct mt65xx_u3phy {
         struct device *dev;
         void __iomem *sif_base; /* include sif2, but exclude port's */
         struct clk *u3phya_ref; /* reference clock of usb3 anolog phy */
+        const struct mt65xx_phy_pdata *pdata;
         struct mt65xx_phy_instance **phys;
         int nphys;
 };
@@ -241,22 +247,26 @@ static void phy_instance_init(struct mt65xx_u3phy *u3phy,
                 tmp = readl(port_base + U3P_U2PHYACR4);
                 tmp &= ~P2C_U2_GPIO_CTR_MSK;
                 writel(tmp, port_base + U3P_U2PHYACR4);
+        }
 
-                tmp = readl(port_base + U3P_USBPHYACR2);
-                tmp |= PA2_RG_SIF_U2PLL_FORCE_EN;
-                writel(tmp, port_base + U3P_USBPHYACR2);
-
-                tmp = readl(port_base + U3D_U2PHYDCR0);
-                tmp &= ~P2C_RG_SIF_U2PLL_FORCE_ON;
-                writel(tmp, port_base + U3D_U2PHYDCR0);
-        } else {
-                tmp = readl(port_base + U3D_U2PHYDCR0);
-                tmp |= P2C_RG_SIF_U2PLL_FORCE_ON;
-                writel(tmp, port_base + U3D_U2PHYDCR0);
-
-                tmp = readl(port_base + U3P_U2PHYDTM0);
-                tmp |= P2C_RG_SUSPENDM | P2C_FORCE_SUSPENDM;
-                writel(tmp, port_base + U3P_U2PHYDTM0);
+        if (u3phy->pdata->avoid_rx_sen_degradation) {
+                if (!index) {
+                        tmp = readl(port_base + U3P_USBPHYACR2);
+                        tmp |= PA2_RG_SIF_U2PLL_FORCE_EN;
+                        writel(tmp, port_base + U3P_USBPHYACR2);
+
+                        tmp = readl(port_base + U3D_U2PHYDCR0);
+                        tmp &= ~P2C_RG_SIF_U2PLL_FORCE_ON;
+                        writel(tmp, port_base + U3D_U2PHYDCR0);
+                } else {
+                        tmp = readl(port_base + U3D_U2PHYDCR0);
+                        tmp |= P2C_RG_SIF_U2PLL_FORCE_ON;
+                        writel(tmp, port_base + U3D_U2PHYDCR0);
+
+                        tmp = readl(port_base + U3P_U2PHYDTM0);
+                        tmp |= P2C_RG_SUSPENDM | P2C_FORCE_SUSPENDM;
+                        writel(tmp, port_base + U3P_U2PHYDTM0);
+                }
         }
 
         tmp = readl(port_base + U3P_USBPHYACR6);
@@ -318,7 +328,7 @@ static void phy_instance_power_on(struct mt65xx_u3phy *u3phy,
                 tmp |= XC3_RG_U3_XTAL_RX_PWD | XC3_RG_U3_FRC_XTAL_RX_PWD;
                 writel(tmp, u3phy->sif_base + U3P_XTALCTL3);
 
-                /* [mt8173]switch 100uA current to SSUSB */
+                /* switch 100uA current to SSUSB */
                 tmp = readl(port_base + U3P_USBPHYACR5);
                 tmp |= PA5_RG_U2_HS_100U_U3_EN;
                 writel(tmp, port_base + U3P_USBPHYACR5);
@@ -335,7 +345,7 @@ static void phy_instance_power_on(struct mt65xx_u3phy *u3phy,
         tmp |= PA5_RG_U2_HSTX_SRCTRL_VAL(4);
         writel(tmp, port_base + U3P_USBPHYACR5);
 
-        if (index) {
+        if (u3phy->pdata->avoid_rx_sen_degradation && index) {
                 tmp = readl(port_base + U3D_U2PHYDCR0);
                 tmp |= P2C_RG_SIF_U2PLL_FORCE_ON;
                 writel(tmp, port_base + U3D_U2PHYDCR0);
@@ -386,7 +396,9 @@ static void phy_instance_power_off(struct mt65xx_u3phy *u3phy,
                 tmp = readl(port_base + U3P_U3_PHYA_REG0);
                 tmp &= ~P3A_RG_U3_VUSB10_ON;
                 writel(tmp, port_base + U3P_U3_PHYA_REG0);
-        } else {
+        }
+
+        if (u3phy->pdata->avoid_rx_sen_degradation && index) {
                 tmp = readl(port_base + U3D_U2PHYDCR0);
                 tmp &= ~P2C_RG_SIF_U2PLL_FORCE_ON;
                 writel(tmp, port_base + U3D_U2PHYDCR0);
@@ -402,7 +414,7 @@ static void phy_instance_exit(struct mt65xx_u3phy *u3phy,
         u32 index = instance->index;
         u32 tmp;
 
-        if (index) {
+        if (u3phy->pdata->avoid_rx_sen_degradation && index) {
                 tmp = readl(port_base + U3D_U2PHYDCR0);
                 tmp &= ~P2C_RG_SIF_U2PLL_FORCE_ON;
                 writel(tmp, port_base + U3D_U2PHYDCR0);
@@ -502,8 +514,24 @@ static struct phy_ops mt65xx_u3phy_ops = {
         .owner          = THIS_MODULE,
 };
 
+static const struct mt65xx_phy_pdata mt2701_pdata = {
+        .avoid_rx_sen_degradation = false,
+};
+
+static const struct mt65xx_phy_pdata mt8173_pdata = {
+        .avoid_rx_sen_degradation = true,
+};
+
+static const struct of_device_id mt65xx_u3phy_id_table[] = {
+        { .compatible = "mediatek,mt2701-u3phy", .data = &mt2701_pdata },
+        { .compatible = "mediatek,mt8173-u3phy", .data = &mt8173_pdata },
+        { },
+};
+MODULE_DEVICE_TABLE(of, mt65xx_u3phy_id_table);
+
 static int mt65xx_u3phy_probe(struct platform_device *pdev)
 {
+        const struct of_device_id *match;
         struct device *dev = &pdev->dev;
         struct device_node *np = dev->of_node;
         struct device_node *child_np;
@@ -513,10 +541,15 @@ static int mt65xx_u3phy_probe(struct platform_device *pdev)
         struct resource res;
         int port, retval;
 
+        match = of_match_node(mt65xx_u3phy_id_table, pdev->dev.of_node);
+        if (!match)
+                return -EINVAL;
+
         u3phy = devm_kzalloc(dev, sizeof(*u3phy), GFP_KERNEL);
         if (!u3phy)
                 return -ENOMEM;
 
+        u3phy->pdata = match->data;
         u3phy->nphys = of_get_child_count(np);
         u3phy->phys = devm_kcalloc(dev, u3phy->nphys,
                                        sizeof(*u3phy->phys), GFP_KERNEL);
@@ -587,12 +620,6 @@ put_child:
         return retval;
 }
 
-static const struct of_device_id mt65xx_u3phy_id_table[] = {
-        { .compatible = "mediatek,mt8173-u3phy", },
-        { },
-};
-MODULE_DEVICE_TABLE(of, mt65xx_u3phy_id_table);
-
 static struct platform_driver mt65xx_u3phy_driver = {
         .probe          = mt65xx_u3phy_probe,
         .driver         = {