[PATCH 2/2] imx8mm_evk: Add Serial Download Protocol support

[Peng Fan]

On 9/20/2022 8:20 AM, Fabio Estevam wrote:
> Add Serial Download Protocol support as it is a useful method to
> load flash.bin to RAM and run it via 'uuu'.
> 
> With this patch, it is possible to start both U-Boot SPL and U-Boot
> proper using the following 'uuu'command:
> 
> $ uuu -brun spl flash.bin
> 
> Based on a patch from Marek Vasut for the imx8mm-mx8menlo board.
> 
> Also, to fit the SPL binary into the internal RAM, select CONFIG_LTO
> to reduce its size.
> 
> Signed-off-by: Fabio Estevam <festevam at denx.de>

Reviewed-by: Peng Fan <peng.fan at nxp.com>


> ---
>   arch/arm/dts/imx8mm-evk-u-boot.dtsi | 16 ++++++++++++++++
>   configs/imx8mm_evk_defconfig        | 21 +++++++++++++++++++++
>   2 files changed, 37 insertions(+)
> 
> diff --git a/arch/arm/dts/imx8mm-evk-u-boot.dtsi b/arch/arm/dts/imx8mm-evk-u-boot.dtsi
> index 36fbf56bc5..d82428f8fe 100644
> --- a/arch/arm/dts/imx8mm-evk-u-boot.dtsi
> +++ b/arch/arm/dts/imx8mm-evk-u-boot.dtsi
> @@ -20,6 +20,10 @@
>   	};
>   };
>   
> +&aips4 {
> +	u-boot,dm-spl;
> +};
> +
>   &reg_usdhc2_vmmc {
>   	u-boot,off-on-delay-us = <20000>;
>   };
> @@ -84,6 +88,18 @@
>   	u-boot,dm-spl;
>   };
>   
> +&usbmisc1 {
> +	u-boot,dm-spl;
> +};
> +
> +&usbphynop1 {
> +	u-boot,dm-spl;
> +};
> +
> +&usbotg1 {
> +	u-boot,dm-spl;
> +};
> +
>   &usdhc1 {
>   	u-boot,dm-spl;
>   };
> diff --git a/configs/imx8mm_evk_defconfig b/configs/imx8mm_evk_defconfig
> index 7bcedcd51f..2dff26b3eb 100644
> --- a/configs/imx8mm_evk_defconfig
> +++ b/configs/imx8mm_evk_defconfig
> @@ -17,6 +17,7 @@ CONFIG_SPL_SERIAL=y
>   CONFIG_SPL_DRIVERS_MISC=y
>   CONFIG_SPL=y
>   CONFIG_SYS_LOAD_ADDR=0x40480000
> +CONFIG_LTO=y
>   CONFIG_DISTRO_DEFAULTS=y
>   CONFIG_FIT=y
>   CONFIG_FIT_EXTERNAL_OFFSET=0x3000
> @@ -38,6 +39,9 @@ CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR=y
>   CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR=0x300
>   CONFIG_SPL_I2C=y
>   CONFIG_SPL_POWER=y
> +CONFIG_SPL_USB_HOST=y
> +CONFIG_SPL_USB_GADGET=y
> +CONFIG_SPL_USB_SDP_SUPPORT=y
>   CONFIG_SPL_WATCHDOG=y
>   CONFIG_SYS_MAXARGS=64
>   CONFIG_SYS_CBSIZE=2048
> @@ -50,6 +54,8 @@ CONFIG_CMD_FUSE=y
>   CONFIG_CMD_GPIO=y
>   CONFIG_CMD_I2C=y
>   CONFIG_CMD_MMC=y
> +CONFIG_CMD_USB_SDP=y
> +CONFIG_CMD_USB_MASS_STORAGE=y
>   CONFIG_CMD_CACHE=y
>   CONFIG_CMD_REGULATOR=y
>   CONFIG_CMD_EXT4_WRITE=y
> @@ -80,9 +86,13 @@ CONFIG_PHY_ATHEROS=y
>   CONFIG_PHY_GIGE=y
>   CONFIG_FEC_MXC=y
>   CONFIG_MII=y
> +CONFIG_SPL_PHY=y
> +CONFIG_SPL_NOP_PHY=y
>   CONFIG_PINCTRL=y
>   CONFIG_SPL_PINCTRL=y
>   CONFIG_PINCTRL_IMX8M=y
> +CONFIG_POWER_DOMAIN=y
> +CONFIG_IMX8M_POWER_DOMAIN=y
>   CONFIG_DM_PMIC=y
>   CONFIG_SPL_DM_PMIC_PCA9450=y
>   CONFIG_DM_REGULATOR=y
> @@ -97,4 +107,15 @@ CONFIG_SPL_SYSRESET=y
>   CONFIG_SYSRESET_PSCI=y
>   CONFIG_SYSRESET_WATCHDOG=y
>   CONFIG_DM_THERMAL=y
> +CONFIG_USB=y
> +CONFIG_USB_EHCI_HCD=y
> +CONFIG_MXC_USB_OTG_HACTIVE=y
> +# CONFIG_USB_STORAGE is not set
> +CONFIG_USB_GADGET=y
> +CONFIG_USB_GADGET_MANUFACTURER="FSL"
> +CONFIG_USB_GADGET_VENDOR_NUM=0x0525
> +CONFIG_USB_GADGET_PRODUCT_NUM=0xa4a5
> +CONFIG_CI_UDC=y
> +CONFIG_SDP_LOADADDR=0x40400000
> +CONFIG_USB_GADGET_DOWNLOAD=y
>   CONFIG_IMX_WATCHDOG=y