Add a PHY driver for the Qualcomm dragonboard 410c which allows switching on/off and resetting the phy connected to the EHCI controllers and USBHS controller.
Signed-off-by: Ramon Fried ramon.fried@gmail.com ---
MAINTAINERS | 1 + drivers/phy/Kconfig | 8 +++ drivers/phy/Makefile | 1 + drivers/phy/msm8916-usbh-phy.c | 109 +++++++++++++++++++++++++++++++++ 4 files changed, 119 insertions(+) create mode 100644 drivers/phy/msm8916-usbh-phy.c
diff --git a/MAINTAINERS b/MAINTAINERS index 39d28e5d45..1a5b543dc7 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -209,6 +209,7 @@ S: Maintained F: arch/arm/mach-snapdragon/ F: drivers/gpio/msm_gpio.c F: drivers/mmc/msm_sdhci.c +F: drivers/phy/msm8916-usbh-phy.c F: drivers/serial/serial_msm.c F: drivers/smem/msm_smem.c F: drivers/usb/host/ehci-msm.c diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index e0822bb775..bcc8e22795 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -139,4 +139,12 @@ config MESON_GXL_USB_PHY This is the generic phy driver for the Amlogic Meson GXL USB2 and USB3 PHYS.
+config MSM8916_USB_PHY + bool "Qualcomm MSM8916 USB PHY support" + depends on PHY + help + Support the USB PHY in msm8916 + + This PHY is found on qualcomm dragonboard410c development board. + endmenu diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 178fb4530e..1e1e4ca11e 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -15,3 +15,4 @@ obj-$(CONFIG_STI_USB_PHY) += sti_usb_phy.o obj-$(CONFIG_PHY_RCAR_GEN2) += phy-rcar-gen2.o obj-$(CONFIG_PHY_STM32_USBPHYC) += phy-stm32-usbphyc.o obj-$(CONFIG_MESON_GXL_USB_PHY) += meson-gxl-usb2.o meson-gxl-usb3.o +obj-$(CONFIG_MSM8916_USB_PHY) += msm8916-usbh-phy.o diff --git a/drivers/phy/msm8916-usbh-phy.c b/drivers/phy/msm8916-usbh-phy.c new file mode 100644 index 0000000000..2c90738fca --- /dev/null +++ b/drivers/phy/msm8916-usbh-phy.c @@ -0,0 +1,109 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2018 Ramon Fried ramon.fried@gmail.com + */ + +#include <common.h> +#include <dm.h> +#include <generic-phy.h> +#include <usb/ehci-ci.h> +#include <usb/ulpi.h> +#include <asm/io.h> + +/* PHY viewport regs */ +#define ULPI_MISC_A_READ 0x96 +#define ULPI_MISC_A_SET 0x97 +#define ULPI_MISC_A_CLEAR 0x98 +#define ULPI_MISC_A_VBUSVLDEXT BIT(0) +#define ULPI_MISC_A_VBUSVLDEXTSEL BIT(1) +#define GEN2_SESS_VLD_CTRL_EN BIT(7) +#define SESS_VLD_CTRL BIT(25) + +struct msm_phy_priv { + void __iomem *regs; + struct usb_ehci *ehci; /* Start of IP core*/ + struct ulpi_viewport ulpi_vp; /* ULPI Viewport */ +}; + +static int msm_phy_power_on(struct phy *phy) +{ + struct msm_phy_priv *priv = dev_get_priv(phy->dev); + + /* Select and enable external configuration with USB PHY */ + ulpi_write(&priv->ulpi_vp, (u8 *)ULPI_MISC_A_SET, + ULPI_MISC_A_VBUSVLDEXTSEL | ULPI_MISC_A_VBUSVLDEXT); + + return 0; +} + +static int msm_phy_power_off(struct phy *phy) +{ + struct msm_phy_priv *priv = dev_get_priv(phy->dev); + + /* Disable VBUS mimicing in the controller. */ + ulpi_write(&priv->ulpi_vp, (u8 *)ULPI_MISC_A_CLEAR, + ULPI_MISC_A_VBUSVLDEXTSEL | ULPI_MISC_A_VBUSVLDEXT); + return 0; +} + +static int msm_phy_reset(struct phy *phy) +{ + struct msm_phy_priv *p = dev_get_priv(phy->dev); + + /* select ULPI phy */ + writel(PORT_PTS_ULPI, &p->ehci->portsc); + + /* Enable sess_vld */ + setbits_le32(&p->ehci->genconfig2, GEN2_SESS_VLD_CTRL_EN); + + /* Enable external vbus configuration in the LINK */ + setbits_le32(&p->ehci->usbcmd, SESS_VLD_CTRL); + + /* USB_OTG_HS_AHB_BURST */ + writel(0x0, &p->ehci->sbuscfg); + + /* USB_OTG_HS_AHB_MODE: HPROT_MODE */ + /* Bus access related config. */ + writel(0x08, &p->ehci->sbusmode); + + return 0; +} + +static int msm_phy_probe(struct udevice *dev) +{ + struct msm_phy_priv *priv = dev_get_priv(dev); + + priv->regs = dev_remap_addr(dev); + if (!priv->regs) + return -EINVAL; + + priv->ehci = (struct usb_ehci *)priv->regs; + priv->ulpi_vp.port_num = 0; + + /* Warning: this will not work if viewport address is > 64 bit due to + * ULPI design. + */ + priv->ulpi_vp.viewport_addr = (phys_addr_t)&priv->ehci->ulpi_viewpoint; + + return 0; +} + +static struct phy_ops msm_phy_ops = { + .power_on = msm_phy_power_on, + .power_off = msm_phy_power_off, + .reset = msm_phy_reset, +}; + +static const struct udevice_id msm_phy_ids[] = { + { .compatible = "qcom,apq8016-usbphy" }, + { } +}; + +U_BOOT_DRIVER(msm8916_usbphy) = { + .name = "msm8916_usbphy", + .id = UCLASS_PHY, + .of_match = msm_phy_ids, + .ops = &msm_phy_ops, + .probe = msm_phy_probe, + .priv_auto_alloc_size = sizeof(struct msm_phy_priv), +};