[PATCH v2 2/2] phy: phy-mt65xx-usb3: add support for mt2701 platform

From: Chunfeng Yun
Date: Mon Apr 11 2016 - 03:41:58 EST

A new compatible string, "mediatek,mt2701-u3phy", is added.

Some register settings to avoid RX sensitivity level degradation
which may arise on mt8173 platform are separated from other
platforms.

Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>
---
drivers/phy/Kconfig | 5 ++-
drivers/phy/phy-mt65xx-usb3.c | 77 ++++++++++++++++++++++++++++-------------
2 files changed, 54 insertions(+), 28 deletions(-)

diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 26566db..3037f28 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -218,9 +218,8 @@ config PHY_MT65XX_USB3
depends on ARCH_MEDIATEK && OF
select GENERIC_PHY
help
- Say 'Y' here to add support for Mediatek USB3.0 PHY driver
- for mt65xx SoCs. it supports two usb2.0 ports and
- one usb3.0 port.
+ Say 'Y' here to add support for Mediatek USB3.0 PHY driver,
+ it supports multiple usb2.0 and usb3.0 ports.

config PHY_HI6220_USB
tristate "hi6220 USB PHY support"
diff --git a/drivers/phy/phy-mt65xx-usb3.c b/drivers/phy/phy-mt65xx-usb3.c
index c0e7b4b..4d85e73 100644
--- a/drivers/phy/phy-mt65xx-usb3.c
+++ b/drivers/phy/phy-mt65xx-usb3.c
@@ -134,6 +134,11 @@
#define U3P_SR_COEF_DIVISOR 1000
#define U3P_FM_DET_CYCLE_CNT 1024

+struct mt65xx_phy_pdata {
+ /* avoid RX sensitivity level degradation only for mt8173 */
+ bool avoid_rx_sen_degradation;
+};
+
struct mt65xx_phy_instance {
struct phy *phy;
void __iomem *port_base;
@@ -145,6 +150,7 @@ struct mt65xx_u3phy {
struct device *dev;
void __iomem *sif_base; /* include sif2, but exclude port's */
struct clk *u3phya_ref; /* reference clock of usb3 anolog phy */
+ const struct mt65xx_phy_pdata *pdata;
struct mt65xx_phy_instance **phys;
int nphys;
};
@@ -241,22 +247,26 @@ static void phy_instance_init(struct mt65xx_u3phy *u3phy,
tmp = readl(port_base + U3P_U2PHYACR4);
tmp &= ~P2C_U2_GPIO_CTR_MSK;
writel(tmp, port_base + U3P_U2PHYACR4);
+ }

- tmp = readl(port_base + U3P_USBPHYACR2);
- tmp |= PA2_RG_SIF_U2PLL_FORCE_EN;
- writel(tmp, port_base + U3P_USBPHYACR2);
-
- tmp = readl(port_base + U3D_U2PHYDCR0);
- tmp &= ~P2C_RG_SIF_U2PLL_FORCE_ON;
- writel(tmp, port_base + U3D_U2PHYDCR0);
- } else {
- tmp = readl(port_base + U3D_U2PHYDCR0);
- tmp |= P2C_RG_SIF_U2PLL_FORCE_ON;
- writel(tmp, port_base + U3D_U2PHYDCR0);
-
- tmp = readl(port_base + U3P_U2PHYDTM0);
- tmp |= P2C_RG_SUSPENDM | P2C_FORCE_SUSPENDM;
- writel(tmp, port_base + U3P_U2PHYDTM0);
+ if (u3phy->pdata->avoid_rx_sen_degradation) {
+ if (!index) {
+ tmp = readl(port_base + U3P_USBPHYACR2);
+ tmp |= PA2_RG_SIF_U2PLL_FORCE_EN;
+ writel(tmp, port_base + U3P_USBPHYACR2);
+
+ tmp = readl(port_base + U3D_U2PHYDCR0);
+ tmp &= ~P2C_RG_SIF_U2PLL_FORCE_ON;
+ writel(tmp, port_base + U3D_U2PHYDCR0);
+ } else {
+ tmp = readl(port_base + U3D_U2PHYDCR0);
+ tmp |= P2C_RG_SIF_U2PLL_FORCE_ON;
+ writel(tmp, port_base + U3D_U2PHYDCR0);
+
+ tmp = readl(port_base + U3P_U2PHYDTM0);
+ tmp |= P2C_RG_SUSPENDM | P2C_FORCE_SUSPENDM;
+ writel(tmp, port_base + U3P_U2PHYDTM0);
+ }
}

tmp = readl(port_base + U3P_USBPHYACR6);
@@ -318,7 +328,7 @@ static void phy_instance_power_on(struct mt65xx_u3phy *u3phy,
tmp |= XC3_RG_U3_XTAL_RX_PWD | XC3_RG_U3_FRC_XTAL_RX_PWD;
writel(tmp, u3phy->sif_base + U3P_XTALCTL3);

- /* [mt8173]switch 100uA current to SSUSB */
+ /* switch 100uA current to SSUSB */
tmp = readl(port_base + U3P_USBPHYACR5);
tmp |= PA5_RG_U2_HS_100U_U3_EN;
writel(tmp, port_base + U3P_USBPHYACR5);
@@ -335,7 +345,7 @@ static void phy_instance_power_on(struct mt65xx_u3phy *u3phy,
tmp |= PA5_RG_U2_HSTX_SRCTRL_VAL(4);
writel(tmp, port_base + U3P_USBPHYACR5);

- if (index) {
+ if (u3phy->pdata->avoid_rx_sen_degradation && index) {
tmp = readl(port_base + U3D_U2PHYDCR0);
tmp |= P2C_RG_SIF_U2PLL_FORCE_ON;
writel(tmp, port_base + U3D_U2PHYDCR0);
@@ -386,7 +396,9 @@ static void phy_instance_power_off(struct mt65xx_u3phy *u3phy,
tmp = readl(port_base + U3P_U3_PHYA_REG0);
tmp &= ~P3A_RG_U3_VUSB10_ON;
writel(tmp, port_base + U3P_U3_PHYA_REG0);
- } else {
+ }
+
+ if (u3phy->pdata->avoid_rx_sen_degradation && index) {
tmp = readl(port_base + U3D_U2PHYDCR0);
tmp &= ~P2C_RG_SIF_U2PLL_FORCE_ON;
writel(tmp, port_base + U3D_U2PHYDCR0);
@@ -402,7 +414,7 @@ static void phy_instance_exit(struct mt65xx_u3phy *u3phy,
u32 index = instance->index;
u32 tmp;

- if (index) {
+ if (u3phy->pdata->avoid_rx_sen_degradation && index) {
tmp = readl(port_base + U3D_U2PHYDCR0);
tmp &= ~P2C_RG_SIF_U2PLL_FORCE_ON;
writel(tmp, port_base + U3D_U2PHYDCR0);
@@ -502,8 +514,24 @@ static struct phy_ops mt65xx_u3phy_ops = {
.owner = THIS_MODULE,
};

+static const struct mt65xx_phy_pdata mt2701_pdata = {
+ .avoid_rx_sen_degradation = false,
+};
+
+static const struct mt65xx_phy_pdata mt8173_pdata = {
+ .avoid_rx_sen_degradation = true,
+};
+
+static const struct of_device_id mt65xx_u3phy_id_table[] = {
+ { .compatible = "mediatek,mt2701-u3phy", .data = &mt2701_pdata },
+ { .compatible = "mediatek,mt8173-u3phy", .data = &mt8173_pdata },
+ { },
+};
+MODULE_DEVICE_TABLE(of, mt65xx_u3phy_id_table);
+
static int mt65xx_u3phy_probe(struct platform_device *pdev)
{
+ const struct of_device_id *match;
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct device_node *child_np;
@@ -513,10 +541,15 @@ static int mt65xx_u3phy_probe(struct platform_device *pdev)
struct resource res;
int port, retval;

+ match = of_match_node(mt65xx_u3phy_id_table, pdev->dev.of_node);
+ if (!match)
+ return -EINVAL;
+
u3phy = devm_kzalloc(dev, sizeof(*u3phy), GFP_KERNEL);
if (!u3phy)
return -ENOMEM;

+ u3phy->pdata = match->data;
u3phy->nphys = of_get_child_count(np);
u3phy->phys = devm_kcalloc(dev, u3phy->nphys,
sizeof(*u3phy->phys), GFP_KERNEL);
@@ -587,12 +620,6 @@ put_child:
return retval;
}

-static const struct of_device_id mt65xx_u3phy_id_table[] = {
- { .compatible = "mediatek,mt8173-u3phy", },
- { },
-};
-MODULE_DEVICE_TABLE(of, mt65xx_u3phy_id_table);
-
static struct platform_driver mt65xx_u3phy_driver = {
.probe = mt65xx_u3phy_probe,
.driver = {
--
1.7.9.5