This is used to force PHY with USB OTG function to enter a specific
mode, and override OTG VBUS and ID signals.
Signed-off-by: Chunfeng Yun <chunfeng....@mediatek.com>
---
drivers/phy/mediatek/phy-mtk-tphy.c | 39 +++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c
b/drivers/phy/mediatek/phy-mtk-tphy.c
index a440de9..9549450 100644
--- a/drivers/phy/mediatek/phy-mtk-tphy.c
+++ b/drivers/phy/mediatek/phy-mtk-tphy.c
@@ -97,9 +97,11 @@
#define U3P_U2PHYDTM1 0x06C
#define P2C_RG_UART_EN BIT(16)
+#define P2C_FORCE_IDDIG BIT(9)
#define P2C_RG_VBUSVALID BIT(5)
#define P2C_RG_SESSEND BIT(4)
#define P2C_RG_AVALID BIT(2)
+#define P2C_RG_IDDIG BIT(1)
#define U3P_U3_CHIP_GPIO_CTLD 0x0c
#define P3C_REG_IP_SW_RST BIT(31)
@@ -586,6 +588,31 @@ static void u2_phy_instance_exit(struct mtk_tphy *tphy,
}
}
+static void u2_phy_instance_set_mode(struct mtk_tphy *tphy,
+ struct mtk_phy_instance *instance,
+ enum phy_mode mode)
+{
+ struct u2phy_banks *u2_banks = &instance->u2_banks;
+ u32 tmp;
+
+ tmp = readl(u2_banks->com + U3P_U2PHYDTM1);
+ switch (mode) {
+ case PHY_MODE_USB_DEVICE:
+ tmp |= P2C_FORCE_IDDIG | P2C_RG_IDDIG;
+ break;
+ case PHY_MODE_USB_HOST:
+ tmp |= P2C_FORCE_IDDIG;
+ tmp &= ~P2C_RG_IDDIG;
+ break;
+ case PHY_MODE_USB_OTG:
+ tmp &= ~(P2C_FORCE_IDDIG | P2C_RG_IDDIG);
+ break;
+ default:
+ return;
+ }
+ writel(tmp, u2_banks->com + U3P_U2PHYDTM1);
+}
+
static void pcie_phy_instance_init(struct mtk_tphy *tphy,
struct mtk_phy_instance *instance)
{
@@ -882,6 +909,17 @@ static int mtk_phy_exit(struct phy *phy)
return 0;
}
+static int mtk_phy_set_mode(struct phy *phy, enum phy_mode mode)
+{
+ struct mtk_phy_instance *instance = phy_get_drvdata(phy);
+ struct mtk_tphy *tphy = dev_get_drvdata(phy->dev.parent);
+
+ if (instance->type == PHY_TYPE_USB2)
+ u2_phy_instance_set_mode(tphy, instance, mode);
+
+ return 0;
+}
+
static struct phy *mtk_phy_xlate(struct device *dev,
struct of_phandle_args *args)
{
@@ -932,6 +970,7 @@ static struct phy *mtk_phy_xlate(struct device *dev,
.exit = mtk_phy_exit,
.power_on = mtk_phy_power_on,
.power_off = mtk_phy_power_off,
+ .set_mode = mtk_phy_set_mode,
.owner = THIS_MODULE,
};
--
1.7.9.5
--
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