[PATCH v8 3/5] usb: phy: add usb3.0 phy driver for mt65xx SoCs
From: Chunfeng Yun
Date: Wed Sep 16 2015 - 02:44:47 EST
support usb3.0 phy of mt65xx SoCs
Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>
---
drivers/phy/Kconfig | 9 +
drivers/phy/Makefile | 1 +
drivers/phy/phy-mt65xx-usb3.c | 456 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 466 insertions(+)
create mode 100644 drivers/phy/phy-mt65xx-usb3.c
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 47da573..ec436c1 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -206,6 +206,15 @@ config PHY_HIX5HD2_SATA
help
Support for SATA PHY on Hisilicon hix5hd2 Soc.
+config PHY_MT65XX_USB3
+ tristate "Mediatek USB3.0 PHY Driver"
+ 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.
+
config PHY_SUN4I_USB
tristate "Allwinner sunxi SoC USB PHY driver"
depends on ARCH_SUNXI && HAS_IOMEM && OF
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index a5b18c1..a7cc629 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_TI_PIPE3) += phy-ti-pipe3.o
obj-$(CONFIG_TWL4030_USB) += phy-twl4030-usb.o
obj-$(CONFIG_PHY_EXYNOS5250_SATA) += phy-exynos5250-sata.o
obj-$(CONFIG_PHY_HIX5HD2_SATA) += phy-hix5hd2-sata.o
+obj-$(CONFIG_PHY_MT65XX_USB3) += phy-mt65xx-usb3.o
obj-$(CONFIG_PHY_SUN4I_USB) += phy-sun4i-usb.o
obj-$(CONFIG_PHY_SUN9I_USB) += phy-sun9i-usb.o
obj-$(CONFIG_PHY_SAMSUNG_USB2) += phy-exynos-usb2.o
diff --git a/drivers/phy/phy-mt65xx-usb3.c b/drivers/phy/phy-mt65xx-usb3.c
new file mode 100644
index 0000000..1f00b05
--- /dev/null
+++ b/drivers/phy/phy-mt65xx-usb3.c
@@ -0,0 +1,456 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ * Author: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <dt-bindings/phy/phy.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+
+/*
+ * for sifslv2 register, but exclude port's;
+ * relative to USB3_SIF2_BASE base address
+ */
+#define SSUSB_SIFSLV_SPLLC 0x0000
+
+/* offsets of sub-segment in each port registers */
+#define SSUSB_SIFSLV_U2PHY_COM_BASE 0x0000
+#define SSUSB_SIFSLV_U3PHYD_BASE 0x0100
+#define SSUSB_USB30_PHYA_SIV_B_BASE 0x0300
+#define SSUSB_SIFSLV_U3PHYA_DA_BASE 0x0400
+
+#define U3P_USBPHYACR0 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0000)
+#define PA0_RG_U2PLL_FORCE_ON BIT(15)
+
+#define U3P_USBPHYACR2 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0008)
+#define PA2_RG_SIF_U2PLL_FORCE_EN BIT(18)
+
+#define U3P_USBPHYACR5 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0014)
+#define PA5_RG_U2_HSTX_SRCTRL GENMASK(14, 12)
+#define PA5_RG_U2_HSTX_SRCTRL_VAL(x) ((0x7 & (x)) << 12)
+#define PA5_RG_U2_HS_100U_U3_EN BIT(11)
+
+#define U3P_USBPHYACR6 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0018)
+#define PA6_RG_U2_ISO_EN BIT(31)
+#define PA6_RG_U2_BC11_SW_EN BIT(23)
+#define PA6_RG_U2_OTG_VBUSCMP_EN BIT(20)
+
+#define U3P_U2PHYACR4 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0020)
+#define P2C_RG_USB20_GPIO_CTL BIT(9)
+#define P2C_USB20_GPIO_MODE BIT(8)
+#define P2C_U2_GPIO_CTR_MSK (P2C_RG_USB20_GPIO_CTL | P2C_USB20_GPIO_MODE)
+
+#define U3D_U2PHYDCR0 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0060)
+#define P2C_RG_SIF_U2PLL_FORCE_ON BIT(24)
+
+#define U3P_U2PHYDTM0 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0068)
+#define P2C_FORCE_UART_EN BIT(26)
+#define P2C_FORCE_DATAIN BIT(23)
+#define P2C_FORCE_DM_PULLDOWN BIT(21)
+#define P2C_FORCE_DP_PULLDOWN BIT(20)
+#define P2C_FORCE_XCVRSEL BIT(19)
+#define P2C_FORCE_SUSPENDM BIT(18)
+#define P2C_FORCE_TERMSEL BIT(17)
+#define P2C_RG_DATAIN GENMASK(13, 10)
+#define P2C_RG_DATAIN_VAL(x) ((0xf & (x)) << 10)
+#define P2C_RG_DMPULLDOWN BIT(7)
+#define P2C_RG_DPPULLDOWN BIT(6)
+#define P2C_RG_XCVRSEL GENMASK(5, 4)
+#define P2C_RG_XCVRSEL_VAL(x) ((0x3 & (x)) << 4)
+#define P2C_RG_SUSPENDM BIT(3)
+#define P2C_RG_TERMSEL BIT(2)
+#define P2C_DTM0_PART_MASK \
+ (P2C_FORCE_DATAIN | P2C_FORCE_DM_PULLDOWN | \
+ P2C_FORCE_DP_PULLDOWN | P2C_FORCE_XCVRSEL | \
+ P2C_FORCE_TERMSEL | P2C_RG_DMPULLDOWN | \
+ P2C_RG_DPPULLDOWN | P2C_RG_TERMSEL)
+
+#define U3P_U2PHYDTM1 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x006C)
+#define P2C_RG_UART_EN BIT(16)
+#define P2C_RG_VBUSVALID BIT(5)
+#define P2C_RG_SESSEND BIT(4)
+#define P2C_RG_AVALID BIT(2)
+
+#define U3P_U3_PHYA_REG0 (SSUSB_USB30_PHYA_SIV_B_BASE + 0x0000)
+#define P3A_RG_U3_VUSB10_ON BIT(5)
+
+#define U3P_U3_PHYA_REG6 (SSUSB_USB30_PHYA_SIV_B_BASE + 0x0018)
+#define P3A_RG_TX_EIDLE_CM GENMASK(31, 28)
+#define P3A_RG_TX_EIDLE_CM_VAL(x) ((0xf & (x)) << 28)
+
+#define U3P_U3_PHYA_REG9 (SSUSB_USB30_PHYA_SIV_B_BASE + 0x0024)
+#define P3A_RG_RX_DAC_MUX GENMASK(5, 1)
+#define P3A_RG_RX_DAC_MUX_VAL(x) ((0x1f & (x)) << 1)
+
+#define U3P_U3PHYA_DA_REG0 (SSUSB_SIFSLV_U3PHYA_DA_BASE + 0x0000)
+#define P3A_RG_XTAL_EXT_EN_U3 GENMASK(11, 10)
+#define P3A_RG_XTAL_EXT_EN_U3_VAL(x) ((0x3 & (x)) << 10)
+
+#define U3P_PHYD_CDR1 (SSUSB_SIFSLV_U3PHYD_BASE + 0x005c)
+#define P3D_RG_CDR_BIR_LTD1 GENMASK(28, 24)
+#define P3D_RG_CDR_BIR_LTD1_VAL(x) ((0x1f & (x)) << 24)
+#define P3D_RG_CDR_BIR_LTD0 GENMASK(12, 8)
+#define P3D_RG_CDR_BIR_LTD0_VAL(x) ((0x1f & (x)) << 8)
+
+#define U3P_XTALCTL3 (SSUSB_SIFSLV_SPLLC + 0x0018)
+#define XC3_RG_U3_XTAL_RX_PWD BIT(9)
+#define XC3_RG_U3_FRC_XTAL_RX_PWD BIT(8)
+
+struct mt65xx_phy_instance {
+ struct phy *phy;
+ void __iomem *port_base;
+ u32 index;
+ u8 type;
+};
+
+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 */
+ struct mt65xx_phy_instance **phys;
+ int nphys;
+};
+
+static void phy_instance_init(struct mt65xx_u3phy *u3phy,
+ struct mt65xx_phy_instance *instance)
+{
+ void __iomem *port_base = instance->port_base;
+ u32 index = instance->index;
+ u32 tmp;
+
+ /* switch to USB function. (system register, force ip into usb mode) */
+ tmp = readl(port_base + U3P_U2PHYDTM0);
+ tmp &= ~P2C_FORCE_UART_EN;
+ writel(tmp, port_base + U3P_U2PHYDTM0);
+
+ tmp = readl(port_base + U3P_U2PHYDTM1);
+ tmp &= ~P2C_RG_UART_EN;
+ writel(tmp, port_base + U3P_U2PHYDTM1);
+
+ if (!index) {
+ tmp = readl(port_base + U3P_U2PHYACR4);
+ tmp &= ~P2C_U2_GPIO_CTR_MSK;
+ writel(tmp, port_base + U3P_U2PHYACR4);
+ }
+
+ /* DP/DM BC1.1 path Disable */
+ tmp = readl(port_base + U3P_USBPHYACR6);
+ tmp &= ~PA6_RG_U2_BC11_SW_EN;
+ writel(tmp, port_base + U3P_USBPHYACR6);
+
+ tmp = readl(port_base + U3P_U3PHYA_DA_REG0);
+ tmp &= ~P3A_RG_XTAL_EXT_EN_U3;
+ tmp |= P3A_RG_XTAL_EXT_EN_U3_VAL(2);
+ writel(tmp, port_base + U3P_U3PHYA_DA_REG0);
+
+ tmp = readl(port_base + U3P_U3_PHYA_REG9);
+ tmp &= ~P3A_RG_RX_DAC_MUX;
+ tmp |= P3A_RG_RX_DAC_MUX_VAL(4);
+ writel(tmp, port_base + U3P_U3_PHYA_REG9);
+
+ tmp = readl(port_base + U3P_U3_PHYA_REG6);
+ tmp &= ~P3A_RG_TX_EIDLE_CM;
+ tmp |= P3A_RG_TX_EIDLE_CM_VAL(0xe);
+ writel(tmp, port_base + U3P_U3_PHYA_REG6);
+
+ tmp = readl(port_base + U3P_PHYD_CDR1);
+ tmp &= ~(P3D_RG_CDR_BIR_LTD0 | P3D_RG_CDR_BIR_LTD1);
+ tmp |= P3D_RG_CDR_BIR_LTD0_VAL(0xc) | P3D_RG_CDR_BIR_LTD1_VAL(0x3);
+ writel(tmp, port_base + U3P_PHYD_CDR1);
+
+ dev_dbg(u3phy->dev, "%s(%d)\n", __func__, index);
+}
+
+static void phy_instance_power_on(struct mt65xx_u3phy *u3phy,
+ struct mt65xx_phy_instance *instance)
+{
+ void __iomem *port_base = instance->port_base;
+ u32 index = instance->index;
+ u32 tmp;
+
+ if (!index) {
+ /* Set RG_SSUSB_VUSB10_ON as 1 after VUSB10 ready */
+ tmp = readl(port_base + U3P_U3_PHYA_REG0);
+ tmp |= P3A_RG_U3_VUSB10_ON;
+ writel(tmp, port_base + U3P_U3_PHYA_REG0);
+ }
+
+ /* (force_suspendm=0) (let suspendm=1, enable usb 480MHz pll) */
+ tmp = readl(port_base + U3P_U2PHYDTM0);
+ tmp &= ~(P2C_FORCE_SUSPENDM | P2C_RG_XCVRSEL);
+ tmp &= ~(P2C_RG_DATAIN | P2C_DTM0_PART_MASK);
+ writel(tmp, port_base + U3P_U2PHYDTM0);
+
+ /* OTG Enable */
+ tmp = readl(port_base + U3P_USBPHYACR6);
+ tmp |= PA6_RG_U2_OTG_VBUSCMP_EN;
+ writel(tmp, port_base + U3P_USBPHYACR6);
+
+ if (!index) {
+ tmp = readl(u3phy->sif_base + U3P_XTALCTL3);
+ tmp |= XC3_RG_U3_XTAL_RX_PWD | XC3_RG_U3_FRC_XTAL_RX_PWD;
+ writel(tmp, u3phy->sif_base + U3P_XTALCTL3);
+ /* [mt8173]disable Change 100uA current from SSUSB */
+ tmp = readl(port_base + U3P_USBPHYACR5);
+ tmp &= ~PA5_RG_U2_HS_100U_U3_EN;
+ writel(tmp, port_base + U3P_USBPHYACR5);
+ }
+ udelay(800);
+
+ tmp = readl(port_base + U3P_U2PHYDTM1);
+ tmp |= P2C_RG_VBUSVALID | P2C_RG_AVALID;
+ tmp &= ~P2C_RG_SESSEND;
+ writel(tmp, port_base + U3P_U2PHYDTM1);
+ /* USB 2.0 slew rate calibration */
+ tmp = readl(port_base + U3P_USBPHYACR5);
+ tmp &= ~PA5_RG_U2_HSTX_SRCTRL;
+ tmp |= PA5_RG_U2_HSTX_SRCTRL_VAL(4);
+ writel(tmp, port_base + U3P_USBPHYACR5);
+
+ dev_dbg(u3phy->dev, "%s(%d)\n", __func__, index);
+}
+
+static void phy_instance_power_off(struct mt65xx_u3phy *u3phy,
+ struct mt65xx_phy_instance *instance)
+{
+ void __iomem *port_base = instance->port_base;
+ u32 index = instance->index;
+ u32 tmp;
+
+ tmp = readl(port_base + U3P_U2PHYDTM0);
+ tmp &= ~(P2C_RG_XCVRSEL | P2C_RG_DATAIN);
+ tmp |= P2C_RG_XCVRSEL_VAL(1) | P2C_RG_DATAIN_VAL(0);
+ tmp |= P2C_FORCE_SUSPENDM;
+ writel(tmp, port_base + U3P_U2PHYDTM0);
+
+ /* OTG Disable */
+ tmp = readl(port_base + U3P_USBPHYACR6);
+ tmp &= ~PA6_RG_U2_OTG_VBUSCMP_EN;
+ writel(tmp, port_base + U3P_USBPHYACR6);
+ if (!index) {
+ /* (also disable)Change 100uA current switch to USB2.0 */
+ tmp = readl(port_base + U3P_USBPHYACR5);
+ tmp &= ~PA5_RG_U2_HS_100U_U3_EN;
+ writel(tmp, port_base + U3P_USBPHYACR5);
+ }
+ udelay(800);
+
+ /* let suspendm=0, set utmi into analog power down */
+ tmp = readl(port_base + U3P_U2PHYDTM0);
+ tmp &= ~P2C_RG_SUSPENDM;
+ writel(tmp, port_base + U3P_U2PHYDTM0);
+ udelay(1);
+
+ tmp = readl(port_base + U3P_U2PHYDTM1);
+ tmp &= ~(P2C_RG_VBUSVALID | P2C_RG_AVALID);
+ tmp |= P2C_RG_SESSEND;
+ writel(tmp, port_base + U3P_U2PHYDTM1);
+
+ if (!index) {
+ tmp = readl(port_base + U3P_U3_PHYA_REG0);
+ tmp &= ~P3A_RG_U3_VUSB10_ON;
+ writel(tmp, port_base + U3P_U3_PHYA_REG0);
+ }
+
+ dev_dbg(u3phy->dev, "%s(%d)\n", __func__, index);
+}
+
+static int mt65xx_phy_init(struct phy *phy)
+{
+ struct mt65xx_phy_instance *instance = phy_get_drvdata(phy);
+ struct mt65xx_u3phy *u3phy = dev_get_drvdata(phy->dev.parent);
+ int ret;
+
+ ret = clk_prepare_enable(u3phy->u3phya_ref);
+ if (ret) {
+ dev_err(u3phy->dev, "failed to enable u3phya_ref\n");
+ return ret;
+ }
+
+ phy_instance_init(u3phy, instance);
+ return 0;
+}
+
+static int mt65xx_phy_power_on(struct phy *phy)
+{
+ struct mt65xx_phy_instance *instance = phy_get_drvdata(phy);
+ struct mt65xx_u3phy *u3phy = dev_get_drvdata(phy->dev.parent);
+
+ phy_instance_power_on(u3phy, instance);
+ return 0;
+}
+
+static int mt65xx_phy_power_off(struct phy *phy)
+{
+ struct mt65xx_phy_instance *instance = phy_get_drvdata(phy);
+ struct mt65xx_u3phy *u3phy = dev_get_drvdata(phy->dev.parent);
+
+ phy_instance_power_off(u3phy, instance);
+ return 0;
+}
+
+static int mt65xx_phy_exit(struct phy *phy)
+{
+ struct mt65xx_u3phy *u3phy = dev_get_drvdata(phy->dev.parent);
+
+ clk_disable_unprepare(u3phy->u3phya_ref);
+ return 0;
+}
+
+static struct phy *mt65xx_phy_xlate(struct device *dev,
+ struct of_phandle_args *args)
+{
+ struct mt65xx_u3phy *u3phy = dev_get_drvdata(dev);
+ struct mt65xx_phy_instance *instance = NULL;
+ struct device_node *phy_np = args->np;
+ int index;
+
+
+ if (args->args_count != 1) {
+ dev_err(dev, "invalid number of cells in 'phy' property\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ for (index = 0; index < u3phy->nphys; index++)
+ if (phy_np == u3phy->phys[index]->phy->dev.of_node) {
+ instance = u3phy->phys[index];
+ break;
+ }
+
+ if (!instance) {
+ dev_err(dev, "failed to find appropriate phy\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ instance->type = args->args[0];
+
+ if (!(instance->type == PHY_TYPE_USB2 ||
+ instance->type == PHY_TYPE_USB3)) {
+ dev_err(dev, "unsupported device type: %d\n", instance->type);
+ return ERR_PTR(-EINVAL);
+ }
+
+ return instance->phy;
+}
+
+static struct phy_ops mt65xx_u3phy_ops = {
+ .init = mt65xx_phy_init,
+ .exit = mt65xx_phy_exit,
+ .power_on = mt65xx_phy_power_on,
+ .power_off = mt65xx_phy_power_off,
+ .owner = THIS_MODULE,
+};
+
+static int mt65xx_u3phy_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct device_node *child_np;
+ struct phy_provider *provider;
+ struct resource *sif_res;
+ struct mt65xx_u3phy *u3phy;
+ struct resource res;
+ int port;
+
+ u3phy = devm_kzalloc(dev, sizeof(*u3phy), GFP_KERNEL);
+ if (!u3phy)
+ return -ENOMEM;
+
+ u3phy->nphys = of_get_child_count(np);
+ u3phy->phys = devm_kcalloc(dev, u3phy->nphys,
+ sizeof(*u3phy->phys), GFP_KERNEL);
+ if (!u3phy->phys)
+ return -ENOMEM;
+
+ u3phy->dev = dev;
+ platform_set_drvdata(pdev, u3phy);
+
+ sif_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ u3phy->sif_base = devm_ioremap_resource(dev, sif_res);
+ if (IS_ERR(u3phy->sif_base)) {
+ dev_err(dev, "failed to remap sif regs\n");
+ return PTR_ERR(u3phy->sif_base);
+ }
+
+ u3phy->u3phya_ref = devm_clk_get(dev, "u3phya_ref");
+ if (IS_ERR(u3phy->u3phya_ref)) {
+ dev_err(dev, "error to get u3phya_ref\n");
+ return PTR_ERR(u3phy->u3phya_ref);
+ }
+
+ port = 0;
+ for_each_child_of_node(np, child_np) {
+ struct mt65xx_phy_instance *instance;
+ struct phy *phy;
+ int retval;
+
+ instance = devm_kzalloc(dev, sizeof(*instance), GFP_KERNEL);
+ if (!instance)
+ return -ENOMEM;
+
+ u3phy->phys[port] = instance;
+
+ phy = devm_phy_create(dev, child_np, &mt65xx_u3phy_ops);
+ if (IS_ERR(phy)) {
+ dev_err(dev, "failed to create phy\n");
+ return PTR_ERR(phy);
+ }
+
+ retval = of_address_to_resource(child_np, 0, &res);
+ if (retval) {
+ dev_err(dev, "failed to get address resource(id-%d)\n",
+ port);
+ return retval;
+ }
+
+ instance->port_base = devm_ioremap_resource(&phy->dev, &res);
+ if (IS_ERR(instance->port_base)) {
+ dev_err(dev, "failed to remap phy regs\n");
+ return PTR_ERR(instance->port_base);
+ }
+
+ instance->phy = phy;
+ instance->index = port;
+ phy_set_drvdata(phy, instance);
+ port++;
+ }
+
+ provider = devm_of_phy_provider_register(dev, mt65xx_phy_xlate);
+
+ return PTR_ERR_OR_ZERO(provider);
+}
+
+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 = {
+ .name = "mt65xx-u3phy",
+ .of_match_table = mt65xx_u3phy_id_table,
+ },
+};
+
+module_platform_driver(mt65xx_u3phy_driver);
+
+MODULE_AUTHOR("Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>");
+MODULE_DESCRIPTION("mt65xx USB PHY driver");
+MODULE_LICENSE("GPL v2");
--
1.8.1.1.dirty
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