From d42ebed1aa669c5a897ec0aa5e1ede8d9069894a Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Thu, 21 Sep 2017 18:31:49 +0800 Subject: [PATCH 125/224] phy: phy-mtk-tphy: add set_mode callback This is used to force PHY with USB OTG function to enter a specific mode, and override OTG IDPIN(or IDDIG) signal. Signed-off-by: Chunfeng Yun Signed-off-by: Kishon Vijay Abraham I --- drivers/phy/mediatek/phy-mtk-tphy.c | 39 +++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) --- a/drivers/phy/mediatek/phy-mtk-tphy.c +++ b/drivers/phy/mediatek/phy-mtk-tphy.c @@ -96,9 +96,11 @@ #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) @@ -580,6 +582,31 @@ static void u2_phy_instance_exit(struct } } +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) { @@ -876,6 +903,17 @@ 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) { @@ -926,6 +964,7 @@ static const struct phy_ops mtk_tphy_ops .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, };