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

Fabio Estevam
2022-09-20T00:21:13Z

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@denx.de>
---
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
--
2.25.1