In preparation for supporting the musb driver, this patch adds support for the usb phy associated with the musb driver.
Signed-off-by: Adam Ford aford173@gmail.com --- drivers/phy/Kconfig | 6 ++++ drivers/phy/Makefile | 1 + drivers/phy/phy-da8xx-usb.c | 64 +++++++++++++++++++++++++++++++++++++ 3 files changed, 71 insertions(+)
V2: Split phy into a separate driver
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 957efb3984..8209ca7323 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -84,6 +84,12 @@ config BCM6368_USBH_PHY help Support for the Broadcom MIPS BCM6368 USBH PHY.
+config PHY_DA8XX_USB + tristate "TI DA8xx USB PHY Driver" + depends on PHY && ARCH_DAVINCI + help + Enable this to support the USB PHY on DA8xx SoCs. + config PIPE3_PHY bool "Support omap's PIPE3 PHY" depends on PHY && ARCH_OMAP2PLUS diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 90646ca55b..b9f5195e1c 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -21,3 +21,4 @@ obj-$(CONFIG_MSM8916_USB_PHY) += msm8916-usbh-phy.o obj-$(CONFIG_OMAP_USB2_PHY) += omap-usb2-phy.o obj-$(CONFIG_KEYSTONE_USB_PHY) += keystone-usb-phy.o obj-$(CONFIG_MT76X8_USB_PHY) += mt76x8-usb-phy.o +obj-$(CONFIG_PHY_DA8XX_USB) += phy-da8xx-usb.o diff --git a/drivers/phy/phy-da8xx-usb.c b/drivers/phy/phy-da8xx-usb.c new file mode 100644 index 0000000000..034b47932d --- /dev/null +++ b/drivers/phy/phy-da8xx-usb.c @@ -0,0 +1,64 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Based on the DA8xx "glue layer" code. + * Copyright (c) 2008-2019, MontaVista Software, Inc. source@mvista.com + * + * DT support added by: Adam Ford aford173@gmail.com + */ + +#include <common.h> +#include <dm.h> +#include <dm/device-internal.h> +#include <dm/lists.h> +#include <asm/arch/hardware.h> +#include <asm/arch/da8xx-usb.h> +#include <asm/io.h> +#include <generic-phy.h> + +static int da8xx_usb_phy_power_on(struct phy *phy) +{ + unsigned long timeout; + + clrsetbits_le32(&davinci_syscfg_regs->cfgchip2, + CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN | + CFGCHIP2_OTGMODE | CFGCHIP2_REFFREQ, + CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN | + CFGCHIP2_PHY_PLLON | CFGCHIP2_REFFREQ_24MHZ); + + /* wait until the usb phy pll locks */ + timeout = get_timer(0); + while (get_timer(timeout) < 10) { + if (readl(&davinci_syscfg_regs->cfgchip2) & CFGCHIP2_PHYCLKGD) + return 0; + } + + debug("Phy was not turned on\n"); + + return -ENODEV; +} + +static int da8xx_usb_phy_power_off(struct phy *phy) +{ + clrsetbits_le32(&davinci_syscfg_regs->cfgchip2, + CFGCHIP2_PHY_PLLON, + CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN); + + return 0; +} + +static const struct udevice_id da8xx_phy_ids[] = { + { .compatible = "ti,da830-usb-phy" }, + { } +}; + +static struct phy_ops da8xx_phy_ops = { + .power_on = da8xx_usb_phy_power_on, + .power_off = da8xx_usb_phy_power_off, +}; + +U_BOOT_DRIVER(da8xx_phy) = { + .name = "da8xx-usb-phy", + .id = UCLASS_PHY, + .of_match = da8xx_phy_ids, + .ops = &da8xx_phy_ops, +};