| Message ID | 20240726113207.3393247-5-xu.yang_2@nxp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2,1/6] usb: phy: mxs: enable regulator phy-3p0 to improve signal qualilty | expand |
On 24-07-26 19:32:06, Xu Yang wrote: > 1p1 is off when the system enters suspend at i.MX6UL. It cause the PHY > get wrong USB DP/DM value, then unexpected wakeup may occur if USB wakeup > enabled. This will enable weak 1p1 during PHY suspend if vbus exist. So > USB DP/DM is correct when system suspend. > > Signed-off-by: Xu Yang <xu.yang_2@nxp.com> > > --- > Changes in v2: > - modify commit message > --- > drivers/usb/phy/phy-mxs-usb.c | 32 ++++++++++++++++++++++++++++---- > 1 file changed, 28 insertions(+), 4 deletions(-) > > diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c > index acaae22df3ba..cc4156c1b148 100644 > --- a/drivers/usb/phy/phy-mxs-usb.c > +++ b/drivers/usb/phy/phy-mxs-usb.c > @@ -71,6 +71,9 @@ > #define BM_USBPHY_PLL_EN_USB_CLKS BIT(6) > > /* Anatop Registers */ > +#define ANADIG_REG_1P1_SET 0x114 > +#define ANADIG_REG_1P1_CLR 0x118 > + > #define ANADIG_ANA_MISC0 0x150 > #define ANADIG_ANA_MISC0_SET 0x154 > #define ANADIG_ANA_MISC0_CLR 0x158 > @@ -123,6 +126,9 @@ > > #define USB_PHY_VLLS_WAKEUP_EN BIT(0) > > +#define BM_ANADIG_REG_1P1_ENABLE_WEAK_LINREG BIT(18) > +#define BM_ANADIG_REG_1P1_TRACK_VDD_SOC_CAP BIT(19) > + > #define to_mxs_phy(p) container_of((p), struct mxs_phy, phy) > > /* Do disconnection between PHY and controller without vbus */ > @@ -196,7 +202,8 @@ static const struct mxs_phy_data imx6sx_phy_data = { > }; > > static const struct mxs_phy_data imx6ul_phy_data = { > - .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS, > + .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS | > + MXS_PHY_HARDWARE_CONTROL_PHY2_CLK, > }; > > static const struct mxs_phy_data imx7ulp_phy_data = { > @@ -241,6 +248,11 @@ static inline bool is_imx7ulp_phy(struct mxs_phy *mxs_phy) > return mxs_phy->data == &imx7ulp_phy_data; > } > > +static inline bool is_imx6ul_phy(struct mxs_phy *mxs_phy) > +{ > + return mxs_phy->data == &imx6ul_phy_data; > +} > + > /* > * PHY needs some 32K cycles to switch from 32K clock to > * bus (such as AHB/AXI, etc) clock. > @@ -884,18 +896,30 @@ static void mxs_phy_wakeup_enable(struct mxs_phy *mxs_phy, bool on) > > static void mxs_phy_enable_ldo_in_suspend(struct mxs_phy *mxs_phy, bool on) > { > - unsigned int reg = on ? ANADIG_ANA_MISC0_SET : ANADIG_ANA_MISC0_CLR; > + unsigned int reg; > + u32 value; > > /* If the SoCs don't have anatop, quit */ > if (!mxs_phy->regmap_anatop) > return; > > - if (is_imx6q_phy(mxs_phy)) > + if (is_imx6q_phy(mxs_phy)) { > + reg = on ? ANADIG_ANA_MISC0_SET : ANADIG_ANA_MISC0_CLR; > regmap_write(mxs_phy->regmap_anatop, reg, > BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG); > - else if (is_imx6sl_phy(mxs_phy)) > + } else if (is_imx6sl_phy(mxs_phy)) { > + reg = on ? ANADIG_ANA_MISC0_SET : ANADIG_ANA_MISC0_CLR; > regmap_write(mxs_phy->regmap_anatop, > reg, BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG_SL); > + } else if (is_imx6ul_phy(mxs_phy)) { > + reg = on ? ANADIG_REG_1P1_SET : ANADIG_REG_1P1_CLR; > + value = BM_ANADIG_REG_1P1_ENABLE_WEAK_LINREG | > + BM_ANADIG_REG_1P1_TRACK_VDD_SOC_CAP; > + if (mxs_phy_get_vbus_status(mxs_phy) && on) > + regmap_write(mxs_phy->regmap_anatop, reg, value); > + else if (!on) > + regmap_write(mxs_phy->regmap_anatop, reg, value); Please check if vbus is not there but wakeup is enabled, and see the behaviour is expected or not. Peter > + } > } > > static int mxs_phy_system_suspend(struct device *dev) > -- > 2.34.1 >
diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c index acaae22df3ba..cc4156c1b148 100644 --- a/drivers/usb/phy/phy-mxs-usb.c +++ b/drivers/usb/phy/phy-mxs-usb.c @@ -71,6 +71,9 @@ #define BM_USBPHY_PLL_EN_USB_CLKS BIT(6) /* Anatop Registers */ +#define ANADIG_REG_1P1_SET 0x114 +#define ANADIG_REG_1P1_CLR 0x118 + #define ANADIG_ANA_MISC0 0x150 #define ANADIG_ANA_MISC0_SET 0x154 #define ANADIG_ANA_MISC0_CLR 0x158 @@ -123,6 +126,9 @@ #define USB_PHY_VLLS_WAKEUP_EN BIT(0) +#define BM_ANADIG_REG_1P1_ENABLE_WEAK_LINREG BIT(18) +#define BM_ANADIG_REG_1P1_TRACK_VDD_SOC_CAP BIT(19) + #define to_mxs_phy(p) container_of((p), struct mxs_phy, phy) /* Do disconnection between PHY and controller without vbus */ @@ -196,7 +202,8 @@ static const struct mxs_phy_data imx6sx_phy_data = { }; static const struct mxs_phy_data imx6ul_phy_data = { - .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS, + .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS | + MXS_PHY_HARDWARE_CONTROL_PHY2_CLK, }; static const struct mxs_phy_data imx7ulp_phy_data = { @@ -241,6 +248,11 @@ static inline bool is_imx7ulp_phy(struct mxs_phy *mxs_phy) return mxs_phy->data == &imx7ulp_phy_data; } +static inline bool is_imx6ul_phy(struct mxs_phy *mxs_phy) +{ + return mxs_phy->data == &imx6ul_phy_data; +} + /* * PHY needs some 32K cycles to switch from 32K clock to * bus (such as AHB/AXI, etc) clock. @@ -884,18 +896,30 @@ static void mxs_phy_wakeup_enable(struct mxs_phy *mxs_phy, bool on) static void mxs_phy_enable_ldo_in_suspend(struct mxs_phy *mxs_phy, bool on) { - unsigned int reg = on ? ANADIG_ANA_MISC0_SET : ANADIG_ANA_MISC0_CLR; + unsigned int reg; + u32 value; /* If the SoCs don't have anatop, quit */ if (!mxs_phy->regmap_anatop) return; - if (is_imx6q_phy(mxs_phy)) + if (is_imx6q_phy(mxs_phy)) { + reg = on ? ANADIG_ANA_MISC0_SET : ANADIG_ANA_MISC0_CLR; regmap_write(mxs_phy->regmap_anatop, reg, BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG); - else if (is_imx6sl_phy(mxs_phy)) + } else if (is_imx6sl_phy(mxs_phy)) { + reg = on ? ANADIG_ANA_MISC0_SET : ANADIG_ANA_MISC0_CLR; regmap_write(mxs_phy->regmap_anatop, reg, BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG_SL); + } else if (is_imx6ul_phy(mxs_phy)) { + reg = on ? ANADIG_REG_1P1_SET : ANADIG_REG_1P1_CLR; + value = BM_ANADIG_REG_1P1_ENABLE_WEAK_LINREG | + BM_ANADIG_REG_1P1_TRACK_VDD_SOC_CAP; + if (mxs_phy_get_vbus_status(mxs_phy) && on) + regmap_write(mxs_phy->regmap_anatop, reg, value); + else if (!on) + regmap_write(mxs_phy->regmap_anatop, reg, value); + } } static int mxs_phy_system_suspend(struct device *dev)
1p1 is off when the system enters suspend at i.MX6UL. It cause the PHY get wrong USB DP/DM value, then unexpected wakeup may occur if USB wakeup enabled. This will enable weak 1p1 during PHY suspend if vbus exist. So USB DP/DM is correct when system suspend. Signed-off-by: Xu Yang <xu.yang_2@nxp.com> --- Changes in v2: - modify commit message --- drivers/usb/phy/phy-mxs-usb.c | 32 ++++++++++++++++++++++++++++---- 1 file changed, 28 insertions(+), 4 deletions(-)