Re: [U-Boot] [PATCH v2 1/2] imx: add macro to detect whether USB PHY is active
Hi Stefan, On 09/08/2017 04:35 PM, Stefan Agner wrote: From: Stefan Agner This macro allows to detect whether the USB PHY is active. This is helpful to detect if the boot ROM has previously started the USB serial downloader. The idea is taken from the mfgtool support in the NXP U-Boot: http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/commit/?h=imx_v2016.03_4.1.15_2.0.0_ga&id=a352ed3c5184b95c4c9f7468f5fbb5f43de5e412 Signed-off-by: Stefan Agner Acked-by: Marcel Ziswiler Tested-by: Fabio Estevam --- Changes in v2: - Move macro to sys_proto.h - Renamed from is_boot_from_usb() to is_usbphy_active() - Use defines for register offset and field - Remove tab after define - Remove comment since the actual "magic" is happening and documented at usage side arch/arm/include/asm/arch-mx6/sys_proto.h | 7 +++ 1 file changed, 7 insertions(+) diff --git a/arch/arm/include/asm/arch-mx6/sys_proto.h b/arch/arm/include/asm/arch-mx6/sys_proto.h index 14f5d948c9..9d4b1d6768 100644 --- a/arch/arm/include/asm/arch-mx6/sys_proto.h +++ b/arch/arm/include/asm/arch-mx6/sys_proto.h @@ -6,3 +6,10 @@ */ #include + +#define USBPHY_PWD 0x + +#define USBPHY_PWD_RXPWDRX (1 << 20) /* receiver block power down */ + At least MX6 and MX7 have USB Host PHY as well as USB OTG. How about is_otgphy_active() instead? +#define is_usbphy_active(void) (!(readl(USB_PHY0_BASE_ADDR + USBPHY_PWD) & \ + USBPHY_PWD_RXPWDRX)) ___ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
[U-Boot] [PATCH v2 1/2] imx: add macro to detect whether USB PHY is active
From: Stefan Agner This macro allows to detect whether the USB PHY is active. This is helpful to detect if the boot ROM has previously started the USB serial downloader. The idea is taken from the mfgtool support in the NXP U-Boot: http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/commit/?h=imx_v2016.03_4.1.15_2.0.0_ga&id=a352ed3c5184b95c4c9f7468f5fbb5f43de5e412 Signed-off-by: Stefan Agner Acked-by: Marcel Ziswiler Tested-by: Fabio Estevam --- Changes in v2: - Move macro to sys_proto.h - Renamed from is_boot_from_usb() to is_usbphy_active() - Use defines for register offset and field - Remove tab after define - Remove comment since the actual "magic" is happening and documented at usage side arch/arm/include/asm/arch-mx6/sys_proto.h | 7 +++ 1 file changed, 7 insertions(+) diff --git a/arch/arm/include/asm/arch-mx6/sys_proto.h b/arch/arm/include/asm/arch-mx6/sys_proto.h index 14f5d948c9..9d4b1d6768 100644 --- a/arch/arm/include/asm/arch-mx6/sys_proto.h +++ b/arch/arm/include/asm/arch-mx6/sys_proto.h @@ -6,3 +6,10 @@ */ #include + +#define USBPHY_PWD 0x + +#define USBPHY_PWD_RXPWDRX (1 << 20) /* receiver block power down */ + +#define is_usbphy_active(void) (!(readl(USB_PHY0_BASE_ADDR + USBPHY_PWD) & \ + USBPHY_PWD_RXPWDRX)) -- 2.14.1 ___ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
