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phy: phy-mtk-tphy: add set_mode callback

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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 <chunfeng.yun@mediatek.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Chunfeng Yun 2017-09-21 18:31:49 +08:00 committed by Kishon Vijay Abraham I
parent 30dbc0415f
commit 5954a10e8e
1 changed files with 39 additions and 0 deletions
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39
drivers/phy/mediatek/phy-mtk-tphy.c
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@ -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)
@ -585,6 +587,31 @@ 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)
{
@ -881,6 +908,17 @@ 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)
{
@ -931,6 +969,7 @@ 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,
};