Re: [PATCH v3 3/5] usb: phy: add usb3.0 phy driver for mt65xx SoCs

Felipe Balbi
2015-07-22T14:23:35Z

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Hi,

On Wed, Jul 22, 2015 at 10:05:43PM +0800, Chunfeng Yun wrote:
> support usb3.0 phy of mt65xx SoCs
>
> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>

you missed Kishon here.

> ---
> drivers/phy/Kconfig | 9 +
> drivers/phy/Makefile | 1 +
> drivers/phy/phy-mt65xx-usb3.c | 426 ++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 436 insertions(+)
> create mode 100644 drivers/phy/phy-mt65xx-usb3.c
>
> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
> index c0e6ede..019cf8b 100644
> --- a/drivers/phy/Kconfig
> +++ b/drivers/phy/Kconfig
> @@ -193,6 +193,15 @@ 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 f344e1b..3ceff2a 100644
> --- a/drivers/phy/Makefile
> +++ b/drivers/phy/Makefile
> @@ -22,6 +22,7 @@ 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..5da4534
> --- /dev/null
> +++ b/drivers/phy/phy-mt65xx-usb3.c
> @@ -0,0 +1,426 @@
> +/*
> + * Copyright (c) 2015 MediaTek Inc.
> + * Author: Chunfeng.Yun <chunfeng.yun@mediatek.com>
> + *
> + * 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 <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/of_address.h>
> +#include <linux/of_device.h>
> +#include <linux/of_gpio.h>
> +#include <linux/of.h>
> +#include <linux/phy/phy.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/regulator/consumer.h>
> +#include <linux/resource.h>
> +
> +/*
> + * for sifslv2 register
> + * relative to USB3_SIF2_BASE base address
> + */
> +#define SSUSB_SIFSLV_SPLLC (0x0000)
> +#define SSUSB_SIFSLV_U2PHY_COM_BASE (0x0800)
> +#define SSUSB_SIFSLV_U3PHYD_BASE (0x0900)
> +#define SSUSB_USB30_PHYA_SIV_B_BASE (0x0b00)
> +#define SSUSB_SIFSLV_U3PHYA_DA_BASE (0x0c00)
> +
> +/*port1 refs. +0x800(refer to port0)*/
> +#define U3P_PORT_INTERVAL (0x800) /*based on port0 */
> +#define U3P_PHY_DELTA(index) ((U3P_PORT_INTERVAL) * (index))
> +
> +#define U3P_USBPHYACR0 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0000)
> +#define PA0_RG_U2PLL_FORCE_ON (0x1 << 15)
> +
> +#define U3P_USBPHYACR2 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0008)
> +#define PA2_RG_SIF_U2PLL_FORCE_EN (0x1 << 18)
> +
> +#define U3P_USBPHYACR5 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0014)
> +#define PA5_RG_U2_HSTX_SRCTRL (0x7 << 12)
> +#define PA5_RG_U2_HSTX_SRCTRL_VAL(x) ((0x7 & (x)) << 12)
> +#define PA5_RG_U2_HS_100U_U3_EN (0x1 << 11)
> +
> +#define U3P_USBPHYACR6 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0018)
> +#define PA6_RG_U2_ISO_EN (0x1 << 31)
> +#define PA6_RG_U2_BC11_SW_EN (0x1 << 23)
> +#define PA6_RG_U2_OTG_VBUSCMP_EN (0x1 << 20)
> +
> +#define U3P_U2PHYACR4 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0020)
> +#define P2C_RG_USB20_GPIO_CTL (0x1 << 9)
> +#define P2C_USB20_GPIO_MODE (0x1 << 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 (0x1 << 24)
> +
> +#define U3P_U2PHYDTM0 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0068)
> +#define P2C_FORCE_UART_EN (0x1 << 26)
> +#define P2C_FORCE_DATAIN (0x1 << 23)
> +#define P2C_FORCE_DM_PULLDOWN (0x1 << 21)
> +#define P2C_FORCE_DP_PULLDOWN (0x1 << 20)
> +#define P2C_FORCE_XCVRSEL (0x1 << 19)
> +#define P2C_FORCE_SUSPENDM (0x1 << 18)
> +#define P2C_FORCE_TERMSEL (0x1 << 17)
> +#define P2C_RG_DATAIN (0xf << 10)
> +#define P2C_RG_DATAIN_VAL(x) ((0xf & (x)) << 10)
> +#define P2C_RG_DMPULLDOWN (0x1 << 7)
> +#define P2C_RG_DPPULLDOWN (0x1 << 6)
> +#define P2C_RG_XCVRSEL (0x3 << 4)
> +#define P2C_RG_XCVRSEL_VAL(x) ((0x3 & (x)) << 4)
> +#define P2C_RG_SUSPENDM (0x1 << 3)
> +#define P2C_RG_TERMSEL (0x1 << 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 (0x1 << 16)
> +#define P2C_RG_VBUSVALID (0x1 << 5)
> +#define P2C_RG_SESSEND (0x1 << 4)
> +#define P2C_RG_AVALID (0x1 << 2)
> +
> +#define U3P_U3_PHYA_REG0 (SSUSB_USB30_PHYA_SIV_B_BASE + 0x0000)
> +#define P3A_RG_U3_VUSB10_ON (1 << 5)
> +
> +#define U3P_U3_PHYA_REG6 (SSUSB_USB30_PHYA_SIV_B_BASE + 0x0018)
> +#define P3A_RG_TX_EIDLE_CM (0xf << 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 (0x1f << 1)
> +#define P3A_RG_RX_DAC_MUX_VAL(x) ((0x1f & (x)) << 1)
> +
> +#define U3P_U3PHYA_DA_REG0 (SSUSB_SIFSLV_U3PHYA_DA_BASE + 0x0)
> +#define P3A_RG_XTAL_EXT_EN_U3 (0x3 << 10)
> +#define P3A_RG_XTAL_EXT_EN_U3_VAL(x) ((0x3 & (x)) << 10)
> +
> +#define U3P_PHYD_CDR1 (SSUSB_SIFSLV_U3PHYD_BASE + 0x5c)
> +#define P3D_RG_CDR_BIR_LTD1 (0x1f << 24)
> +#define P3D_RG_CDR_BIR_LTD1_VAL(x) ((0x1f & (x)) << 24)
> +#define P3D_RG_CDR_BIR_LTD0 (0x1f << 8)
> +#define P3D_RG_CDR_BIR_LTD0_VAL(x) ((0x1f & (x)) << 8)
> +
> +#define U3P_XTALCTL3 (SSUSB_SIFSLV_SPLLC + 0x18)
> +#define XC3_RG_U3_XTAL_RX_PWD (0x1 << 9)
> +#define XC3_RG_U3_FRC_XTAL_RX_PWD (0x1 << 8)
> +
> +#define MT65XX_MAX_PHYS 2
> +
> +struct mt65xx_phy_instance {
> + struct phy *phy;
> + u32 index;
> + u32 delta; /* increament refers to port0 */
> +};
> +
> +struct mt65xx_u3phy {
> + struct device *dev;
> + void __iomem *sif_base; /* include sif2 */
> + struct clk *u3phya_ref; /* reference clock of usb3 anolog phy */
> + struct mt65xx_phy_instance phys[MT65XX_MAX_PHYS];
> +};
> +
> +static struct mt65xx_u3phy *to_usbdrd_phy(
> + struct mt65xx_phy_instance *instance)
> +{
> + return container_of((instance), struct mt65xx_u3phy,
> + phys[(instance)->index]);
> +}
> +
> +static void phy_instance_init(struct mt65xx_phy_instance *instance)
> +{
> + struct mt65xx_u3phy *u3phy = to_usbdrd_phy(instance);
> + void __iomem *sif_base = u3phy->sif_base + instance->delta;
> + u32 index = instance->index;
> + u32 tmp;
> +
> + /* switch to USB function. (system register, force ip into usb mode) */
> + tmp = readl(sif_base + U3P_U2PHYDTM0);
> + tmp &= ~P2C_FORCE_UART_EN;
> + writel(tmp, sif_base + U3P_U2PHYDTM0);
> +
> + tmp = readl(sif_base + U3P_U2PHYDTM1);
> + tmp &= ~P2C_RG_UART_EN;
> + writel(tmp, sif_base + U3P_U2PHYDTM1);
> +
> + if (!index) {
> + tmp = readl(sif_base + U3P_U2PHYACR4);
> + tmp &= ~P2C_U2_GPIO_CTR_MSK;
> + writel(tmp, sif_base + U3P_U2PHYACR4);
> + }
> +
> + /* DP/DM BC1.1 path Disable */
> + tmp = readl(sif_base + U3P_USBPHYACR6);
> + tmp &= ~PA6_RG_U2_BC11_SW_EN;
> + writel(tmp, sif_base + U3P_USBPHYACR6);
> +
> + tmp = readl(sif_base + U3P_U3PHYA_DA_REG0);
> + tmp &= ~P3A_RG_XTAL_EXT_EN_U3;
> + tmp |= P3A_RG_XTAL_EXT_EN_U3_VAL(2);
> + writel(tmp, sif_base + U3P_U3PHYA_DA_REG0);
> +
> + tmp = readl(sif_base + U3P_U3_PHYA_REG9);
> + tmp &= ~P3A_RG_RX_DAC_MUX;
> + tmp |= P3A_RG_RX_DAC_MUX_VAL(4);
> + writel(tmp, sif_base + U3P_U3_PHYA_REG9);
> +
> + tmp = readl(sif_base + U3P_U3_PHYA_REG6);
> + tmp &= ~P3A_RG_TX_EIDLE_CM;
> + tmp |= P3A_RG_TX_EIDLE_CM_VAL(0xe);
> + writel(tmp, sif_base + U3P_U3_PHYA_REG6);
> +
> + tmp = readl(sif_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, sif_base + U3P_PHYD_CDR1);
> +
> + dev_dbg(u3phy->dev, "%s(%d)\n", __func__, index);
> +}
> +
> +static void phy_instance_power_on(struct mt65xx_phy_instance *instance)
> +{
> + struct mt65xx_u3phy *u3phy = to_usbdrd_phy(instance);
> + void __iomem *sif_base = u3phy->sif_base + instance->delta;
> + u32 index = instance->index;
> + u32 tmp;
> +
> + if (!index) {
> + /* Set RG_SSUSB_VUSB10_ON as 1 after VUSB10 ready */
> + tmp = readl(sif_base + U3P_U3_PHYA_REG0);
> + tmp |= P3A_RG_U3_VUSB10_ON;
> + writel(tmp, sif_base + U3P_U3_PHYA_REG0);
> + }
> +
> + /* (force_suspendm=0) (let suspendm=1, enable usb 480MHz pll) */
> + tmp = readl(sif_base + U3P_U2PHYDTM0);
> + tmp &= ~(P2C_FORCE_SUSPENDM | P2C_RG_XCVRSEL);
> + tmp &= ~(P2C_RG_DATAIN | P2C_DTM0_PART_MASK);
> + writel(tmp, sif_base + U3P_U2PHYDTM0);
> +
> + /* OTG Enable */
> + tmp = readl(sif_base + U3P_USBPHYACR6);
> + tmp |= PA6_RG_U2_OTG_VBUSCMP_EN;
> + writel(tmp, sif_base + U3P_USBPHYACR6);
> +
> + if (!index) {
> + tmp = readl(sif_base + U3P_XTALCTL3);
> + tmp |= XC3_RG_U3_XTAL_RX_PWD | XC3_RG_U3_FRC_XTAL_RX_PWD;
> + writel(tmp, sif_base + U3P_XTALCTL3);
> + /* [mt8173]disable Change 100uA current from SSUSB */
> + tmp = readl(sif_base + U3P_USBPHYACR5);
> + tmp &= ~PA5_RG_U2_HS_100U_U3_EN;
> + writel(tmp, sif_base + U3P_USBPHYACR5);
> + }
> + udelay(800);
> +
> + tmp = readl(sif_base + U3P_U2PHYDTM1);
> + tmp |= P2C_RG_VBUSVALID | P2C_RG_AVALID;
> + tmp &= ~P2C_RG_SESSEND;
> + writel(tmp, sif_base + U3P_U2PHYDTM1);
> + /* USB 2.0 slew rate calibration */
> + tmp = readl(sif_base + U3P_USBPHYACR5);
> + tmp &= ~PA5_RG_U2_HSTX_SRCTRL;
> + tmp |= PA5_RG_U2_HSTX_SRCTRL_VAL(4);
> + writel(tmp, sif_base + U3P_USBPHYACR5);
> +
> + dev_dbg(u3phy->dev, "%s(%d)(delta: 0x%x)\n", __func__,
> + index, u3phy->phys[index].delta);
> +}
> +
> +static void phy_instance_power_off(struct mt65xx_phy_instance *instance)
> +{
> + struct mt65xx_u3phy *u3phy = to_usbdrd_phy(instance);
> + void __iomem *sif_base = u3phy->sif_base + instance->delta;
> + u32 index = instance->index;
> + u32 tmp;
> +
> + tmp = readl(sif_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, sif_base + U3P_U2PHYDTM0);
> +
> + /* OTG Disable */
> + tmp = readl(sif_base + U3P_USBPHYACR6);
> + tmp &= ~PA6_RG_U2_OTG_VBUSCMP_EN;
> + writel(tmp, sif_base + U3P_USBPHYACR6);
> + if (!index) {
> + /* (also disable)Change 100uA current switch to USB2.0 */
> + tmp = readl(sif_base + U3P_USBPHYACR5);
> + tmp &= ~PA5_RG_U2_HS_100U_U3_EN;
> + writel(tmp, sif_base + U3P_USBPHYACR5);
> + }
> + udelay(800);
> +
> + /* let suspendm=0, set utmi into analog power down */
> + tmp = readl(sif_base + U3P_U2PHYDTM0);
> + tmp &= ~P2C_RG_SUSPENDM;
> + writel(tmp, sif_base + U3P_U2PHYDTM0);
> + udelay(1);
> +
> + tmp = readl(sif_base + U3P_U2PHYDTM1);
> + tmp &= ~(P2C_RG_VBUSVALID | P2C_RG_AVALID);
> + tmp |= P2C_RG_SESSEND;
> + writel(tmp, sif_base + U3P_U2PHYDTM1);
> +
> + if (!index) {
> + tmp = readl(sif_base + U3P_U3_PHYA_REG0);
> + tmp &= ~P3A_RG_U3_VUSB10_ON;
> + writel(tmp, sif_base + U3P_U3_PHYA_REG0);
> + }
> +
> + dev_dbg(u3phy->dev, "%s(%d)\n", __func__, index);
> +}
> +
> +static int u3phy_clk_enable(struct mt65xx_u3phy *u3phy)
> +{
> + int ret;
> +
> + ret = clk_prepare_enable(u3phy->u3phya_ref);
> + if (ret) {
> + dev_err(u3phy->dev, "failed to enable u3phya_ref\n");
> + return ret;
> + }
> + udelay(100);
> +
> + return 0;
> +}
> +
> +static int mt65xx_phy_init(struct phy *phy)
> +{
> + struct mt65xx_phy_instance *instance = phy_get_drvdata(phy);
> +
> + phy_instance_init(instance);
> + return 0;
> +}
> +
> +static int mt65xx_phy_power_on(struct phy *phy)
> +{
> + struct mt65xx_phy_instance *instance = phy_get_drvdata(phy);
> +
> + phy_instance_power_on(instance);
> + msleep(20);
> + return 0;
> +}
> +
> +static int mt65xx_phy_power_off(struct phy *phy)
> +{
> + struct mt65xx_phy_instance *instance = phy_get_drvdata(phy);
> +
> + phy_instance_power_off(instance);
> + return 0;
> +}
> +
> +static struct phy *mt65xx_phy_xlate(struct device *dev,
> + struct of_phandle_args *args)
> +{
> + struct mt65xx_u3phy *u3phy = dev_get_drvdata(dev);
> +
> + if (WARN_ON(args->args[0] > MT65XX_MAX_PHYS))
> + return ERR_PTR(-ENODEV);
> +
> + return u3phy->phys[args->args[0]].phy;
> +}
> +
> +static struct phy_ops mt65xx_u3phy_ops = {
> + .init = mt65xx_phy_init,
> + .power_on = mt65xx_phy_power_on,
> + .power_off = mt65xx_phy_power_off,
> + .owner = THIS_MODULE,
> +};
> +
> +static const struct of_device_id mt65xx_u3phy_id_table[] = {
> + { .compatible = "mediatek,mt8173-u3phy",},
> + { },
> +};
> +MODULE_DEVICE_TABLE(of, mt65xx_u3phy_id_table);
> +
> +
> +static int mt65xx_u3phy_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct phy_provider *phy_provider;
> + struct resource *sif_res;
> + struct mt65xx_u3phy *u3phy;
> + int i;
> +
> + u3phy = devm_kzalloc(dev, sizeof(*u3phy), GFP_KERNEL);
> + if (!u3phy)
> + 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);
> + }
> +
> + for (i = 0; i < MT65XX_MAX_PHYS; i++) {
> + struct mt65xx_phy_instance *instance;
> + struct phy *phy;
> +
> + phy = devm_phy_create(dev, NULL, &mt65xx_u3phy_ops);
> + if (IS_ERR(phy)) {
> + dev_err(dev, "failed to create mt65xx_u3phy phy\n");
> + return PTR_ERR(phy);
> + }
> + instance = &u3phy->phys[i];
> + instance->phy = phy;
> + instance->index = i;
> + instance->delta = U3P_PHY_DELTA(i);
> + phy_set_drvdata(phy, instance);
> + }
> +
> + phy_provider = devm_of_phy_provider_register(dev, mt65xx_phy_xlate);
> + if (IS_ERR(phy_provider)) {
> + dev_err(dev, "Failed to register phy provider\n");
> + return PTR_ERR(phy_provider);
> + }
> +
> + return u3phy_clk_enable(u3phy);
> +}
> +
> +static int mt65xx_u3phy_remove(struct platform_device *pdev)
> +{
> + struct mt65xx_u3phy *u3phy = platform_get_drvdata(pdev);
> +
> + clk_disable_unprepare(u3phy->u3phya_ref);
> +
> + return 0;
> +}
> +
> +static struct platform_driver mt65xx_u3phy_driver = {
> + .probe = mt65xx_u3phy_probe,
> + .remove = mt65xx_u3phy_remove,
> + .driver = {
> + .name = "mt65xx-u3phy",
> + .of_match_table = mt65xx_u3phy_id_table,
> + },
> +};
> +
> +module_platform_driver(mt65xx_u3phy_driver);
> +
> +MODULE_DESCRIPTION("Mt65xx USB PHY driver");
> +MODULE_LICENSE("GPL v2");
> --
> 1.8.1.1.dirty
>

--
balbi

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