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| author | Chunfeng Yun <chunfeng.yun@mediatek.com> | 2023-12-11 10:56:24 +0800 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-12-21 22:39:59 +0530 |
| commit | 9b27303003f5af0d378f29ccccea57c7d65cc642 (patch) | |
| tree | 7496e29aec6577921583066822a8576226a02614 /drivers/phy/mediatek | |
| parent | cc230a4cd8e91f64c90b5494dfd76848197418ed (diff) | |
| download | lwn-9b27303003f5af0d378f29ccccea57c7d65cc642.tar.gz lwn-9b27303003f5af0d378f29ccccea57c7d65cc642.zip | |
phy: mediatek: tphy: add support force phy mode switch
this is used to be compatible with old SoCs, such as mt8195, which shares
t-phy between usb3 and pcie controller, usually, it's default mode is pcie
rc mode, and could use force mode to switch into usb3 mode, because pericfg
layer doesn't provide mode switch, also no efuse or jumper can be used;
Currently, only support switch from default pcie mode to usb3;
Note: don't use this way on new SoCs, use pericfg layer's mode switch
instead (by perperty "mediatek,syscon-type").
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/20231211025624.28991-2-chunfeng.yun@mediatek.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/phy/mediatek')
| -rw-r--r-- | drivers/phy/mediatek/phy-mtk-tphy.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c b/drivers/phy/mediatek/phy-mtk-tphy.c index 05eab9014132..a4746f6cb8a1 100644 --- a/drivers/phy/mediatek/phy-mtk-tphy.c +++ b/drivers/phy/mediatek/phy-mtk-tphy.c @@ -185,6 +185,10 @@ #define P3D_RG_CDR_BIR_LTD1 GENMASK(28, 24) #define P3D_RG_CDR_BIR_LTD0 GENMASK(12, 8) +#define U3P_U3_PHYD_TOP1 0x100 +#define P3D_RG_PHY_MODE GENMASK(2, 1) +#define P3D_RG_FORCE_PHY_MODE BIT(0) + #define U3P_U3_PHYD_RXDET1 0x128 #define P3D_RG_RXDET_STB2_SET GENMASK(17, 9) @@ -327,6 +331,7 @@ struct mtk_phy_instance { int discth; int pre_emphasis; bool bc12_en; + bool type_force_mode; }; struct mtk_tphy { @@ -768,6 +773,23 @@ static void u3_phy_instance_init(struct mtk_tphy *tphy, void __iomem *phya = u3_banks->phya; void __iomem *phyd = u3_banks->phyd; + if (instance->type_force_mode) { + /* force phy as usb mode, default is pcie rc mode */ + mtk_phy_update_field(phyd + U3P_U3_PHYD_TOP1, P3D_RG_PHY_MODE, 1); + mtk_phy_set_bits(phyd + U3P_U3_PHYD_TOP1, P3D_RG_FORCE_PHY_MODE); + /* power down phy by ip and pipe reset */ + mtk_phy_set_bits(u3_banks->chip + U3P_U3_CHIP_GPIO_CTLD, + P3C_FORCE_IP_SW_RST | P3C_MCU_BUS_CK_GATE_EN); + mtk_phy_set_bits(u3_banks->chip + U3P_U3_CHIP_GPIO_CTLE, + P3C_RG_SWRST_U3_PHYD | P3C_RG_SWRST_U3_PHYD_FORCE_EN); + udelay(10); + /* power on phy again */ + mtk_phy_clear_bits(u3_banks->chip + U3P_U3_CHIP_GPIO_CTLD, + P3C_FORCE_IP_SW_RST | P3C_MCU_BUS_CK_GATE_EN); + mtk_phy_clear_bits(u3_banks->chip + U3P_U3_CHIP_GPIO_CTLE, + P3C_RG_SWRST_U3_PHYD | P3C_RG_SWRST_U3_PHYD_FORCE_EN); + } + /* gating PCIe Analog XTAL clock */ mtk_phy_set_bits(u3_banks->spllc + U3P_SPLLC_XTALCTL3, XC3_RG_U3_XTAL_RX_PWD | XC3_RG_U3_FRC_XTAL_RX_PWD); @@ -1120,6 +1142,9 @@ static void phy_parse_property(struct mtk_tphy *tphy, { struct device *dev = &instance->phy->dev; + if (instance->type == PHY_TYPE_USB3) + instance->type_force_mode = device_property_read_bool(dev, "mediatek,force-mode"); + if (instance->type != PHY_TYPE_USB2) return; |