Odroid UMS gadgets

buildroot-external/Config.in

@@ -9,6 +9,7 @@ source "$BR2_EXTERNAL_HASSOS_PATH/package/os-agent/Config.in"
 source "$BR2_EXTERNAL_HASSOS_PATH/package/pi-bluetooth/Config.in"
 source "$BR2_EXTERNAL_HASSOS_PATH/package/qemu-guest-agent/Config.in"
 source "$BR2_EXTERNAL_HASSOS_PATH/package/lxd-guest-agent/Config.in"
+source "$BR2_EXTERNAL_HASSOS_PATH/package/linux-gadget/Config.in"
 source "$BR2_EXTERNAL_HASSOS_PATH/package/rockchip-blobs/Config.in"
 source "$BR2_EXTERNAL_HASSOS_PATH/package/rpi-eeprom/Config.in"
 source "$BR2_EXTERNAL_HASSOS_PATH/package/rpi-rf-mod/Config.in"

buildroot-external/board/hardkernel/odroid-m1s/patches/linux/0004-set-peripheral-mode-for-usb-otg-port.patch

@@ -0,0 +1,25 @@
+From 6e5ac47bd70658098b9e31b63484e6bf061c6183 Mon Sep 17 00:00:00 2001
+From: Tim Lunn <[email protected]>
+Date: Mon, 29 Jan 2024 15:04:59 +1100
+Subject: [PATCH] set peripheral mode for usb otg port
+
+---
+ arch/arm64/boot/dts/rockchip/rk3566-odroid-m1s.dts | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/arch/arm64/boot/dts/rockchip/rk3566-odroid-m1s.dts b/arch/arm64/boot/dts/rockchip/rk3566-odroid-m1s.dts
+index a5d9216b544b..2dda6038930e 100644
+--- a/arch/arm64/boot/dts/rockchip/rk3566-odroid-m1s.dts
++++ b/arch/arm64/boot/dts/rockchip/rk3566-odroid-m1s.dts
+@@ -642,7 +642,7 @@ &usb_host0_ohci {
+ };
+
+ &usb_host0_xhci {
+-	dr_mode = "otg";
++	dr_mode = "peripheral";
+ 	status = "okay";
+ };
+
+-- 
+2.40.1
+

buildroot-external/configs/odroid_m1s_defconfig

@@ -158,6 +158,9 @@ BR2_PACKAGE_HASSIO_ARCH="aarch64"
 BR2_PACKAGE_HASSIO_MACHINE="odroid-m1"
 BR2_PACKAGE_OS_AGENT=y
 BR2_PACKAGE_OS_AGENT_BOARD="OdroidM1S"
+BR2_PACKAGE_LINUX_GADGET=y
+BR2_PACKAGE_LINUX_GADGET_GETTY=y
+BR2_PACKAGE_LINUX_GADGET_UMS=y
 BR2_PACKAGE_ROCKCHIP_BLOBS=y
 BR2_PACKAGE_ROCKCHIP_BLOBS_VERSION="b4558da0860ca48bf1a571dd33ccba580b9abe23"
 BR2_PACKAGE_ROCKCHIP_BLOBS_ATF="bin/rk35/rk3568_bl31_v1.43.elf"

buildroot-external/package/linux-gadget/Config.in

@@ -0,0 +1,28 @@
+config BR2_PACKAGE_LINUX_GADGET
+	bool "Activate CDC UMS gadget"
+	depends on BR2_LINUX_KERNEL
+	help
+	  Activate linux gadgets for CDC console and UMS
+
+if BR2_PACKAGE_LINUX_GADGET
+
+config BR2_PACKAGE_LINUX_GADGET_GETTY
+	bool "CDC-ACM Getty"
+	help
+	  Activate getty console on OTG port
+
+config BR2_PACKAGE_LINUX_GADGET_UMS
+	bool "UMS Gadget"
+	help
+	  Activate UMS gadget on OTG port
+if BR2_PACKAGE_LINUX_GADGET_UMS
+
+config BR2_PACKAGE_LINUX_GADGET_UMS_LUN
+	string "UMS LUN"
+	default "/dev/mmcblk0"
+	help
+	  LUN backing file for UMS gadget
+
+endif
+
+endif

buildroot-external/package/linux-gadget/linux-gadget.mk

@@ -0,0 +1,42 @@
+LINUX_GADGET_VERSION = 0.99.0
+LINUX_GADGET_LICENSE = Apache License 2.0
+LINUX_GADGET_LICENSE_FILES = $(BR2_EXTERNAL_HASSOS_PATH)/../LICENSE
+LINUX_GADGET_SITE = $(BR2_EXTERNAL_HASSOS_PATH)/package/linux-gadget
+LINUX_GADGET_SITE_METHOD = local
+
+ifneq ($(BR2_PACKAGE_LINUX_GADGET_GETTY),y)
+LINUX_GADGET_MOD = "g_mass_storage"
+else ifneq ($(BR2_PACKAGE_LINUX_GADGET_UMS),y)
+LINUX_GADGET_MOD = "g_serial"
+else
+LINUX_GADGET_MOD = "g_acm_ms"
+endif
+
+ifeq ($(BR2_PACKAGE_LINUX_GADGET_UMS),y)
+LINUX_GADGET_OPT = "file=$(BR2_PACKAGE_LINUX_GADGET_UMS_LUN)"
+endif
+
+define LINUX_GADGET_BUILD_CMDS
+	echo $(LINUX_GADGET_MOD) > $(@D)/gadget.conf
+	if [[ -n $(LINUX_GADGET_OPT) ]]; then \
+		echo $(LINUX_GADGET_OPT) > $(@D)/gadget_opt.conf; \
+	fi
+endef
+
+define LINUX_GADGET_INSTALL_TARGET_CMDS
+	$(INSTALL) -m 0644 -D $(@D)/gadget.conf \
+		$(TARGET_DIR)/etc/modules-load.d/gadget.conf
+
+	if [ "$(BR2_PACKAGE_LINUX_GADGET_GETTY)" = "y" ]; then \
+		$(INSTALL) -d $(TARGET_DIR)/etc/systemd/system/getty.target.wants; \
+		ln -fs "/usr/lib/systemd/system/[email protected]" \
+			"$(TARGET_DIR)/etc/systemd/system/getty.target.wants/[email protected]"; \
+	fi
+
+	if [[ -n $(LINUX_GADGET_OPT) ]]; then \
+		$(INSTALL) -m 0644 -D $(@D)/gadget_opt.conf \
+			$(TARGET_DIR)/etc/modprobe.d/gadget.conf; \
+	fi
+endef
+
+$(eval $(generic-package))