Add Hailo-8 firmware for Raspberry Pi AI Kit/HAT on RPi 5 (#3680)

Add Hailo-8 firmware binary for Rasperry Pi AI accelerators. The version needs
to be determined from the Git history of the kernel sources, as the driver
source code is included in the RPi downstream kernel and the version string
can't be found in the code directly.

Fixes #3663

buildroot-external/Config.in

@@ -2,6 +2,7 @@ source "$BR2_EXTERNAL_HASSOS_PATH/package/bluetooth-rtl8723/Config.in"
 source "$BR2_EXTERNAL_HASSOS_PATH/package/eq3_char_loop/Config.in"
 source "$BR2_EXTERNAL_HASSOS_PATH/package/gasket/Config.in"
 source "$BR2_EXTERNAL_HASSOS_PATH/package/generic_raw_uart/Config.in"
+source "$BR2_EXTERNAL_HASSOS_PATH/package/hailo8-firmware/Config.in"
 source "$BR2_EXTERNAL_HASSOS_PATH/package/hardkernel-boot/Config.in"
 source "$BR2_EXTERNAL_HASSOS_PATH/package/hassio/Config.in"
 source "$BR2_EXTERNAL_HASSOS_PATH/package/khadas-boot/Config.in"

buildroot-external/configs/rpi5_64_defconfig

@@ -143,6 +143,7 @@ BR2_PACKAGE_HOST_GPTFDISK=y
 BR2_PACKAGE_HOST_MTOOLS=y
 BR2_PACKAGE_HOST_RAUC=y
 BR2_PACKAGE_GASKET=y
+BR2_PACKAGE_HAILO8_FIRMWARE=y
 BR2_PACKAGE_HASSIO=y
 BR2_PACKAGE_HASSIO_ARCH="aarch64"
 BR2_PACKAGE_HASSIO_MACHINE="raspberrypi5-64"

buildroot-external/package/hailo8-firmware/Config.in

@@ -0,0 +1,6 @@
+config BR2_PACKAGE_HAILO8_FIRMWARE
+	bool "Hailo-8 Firmware"
+	help
+	  Firmware for Hailo-8 PCIe device found e.g. on Raspberry Pi AI
+	  Kit and Raspberry Pi AI HAT+. Requires the hailo kernel driver
+	  (included in Raspberry Pi's downstream kernel).

buildroot-external/package/hailo8-firmware/hailo8-firmware.hash

@@ -0,0 +1 @@
+sha256  bfa576dd782359d74cabcb19e87c3a934dce03dea0785e41f86fecc9a687a92b  hailo8_fw.4.18.0.bin

buildroot-external/package/hailo8-firmware/hailo8-firmware.mk

@@ -0,0 +1,25 @@
+################################################################################
+#
+# Hailo-8 Firmware
+#
+################################################################################
+
+HAILO8_FIRMWARE_VERSION = 4.18.0
+HAILO8_FIRMWARE_LICENSE = PROPRIETARY
+HAILO8_FIRMWARE_SOURCE= hailo8_fw.$(HAILO8_FIRMWARE_VERSION).bin
+HAILO8_FIRMWARE_SITE="https://hailo-hailort.s3.eu-west-2.amazonaws.com/Hailo8/$(HAILO8_FIRMWARE_VERSION)/FW"
+
+define HAILO8_FIRMWARE_EXTRACT_CMDS
+	cp $(HAILO8_FIRMWARE_DL_DIR)/$(HAILO8_FIRMWARE_SOURCE) $(@D)
+endef
+
+define HAILO8_FIRMWARE_BUILD_CMDS
+	cp $(@D)/$(HAILO8_FIRMWARE_SOURCE) $(@D)/hailo8_fw.bin
+endef
+
+define HAILO8_FIRMWARE_INSTALL_TARGET_CMDS
+	$(INSTALL) -d $(TARGET_DIR)/lib/firmware/hailo
+	$(INSTALL) -m 0644 $(@D)/hailo8_fw.bin $(TARGET_DIR)/lib/firmware/hailo/
+endef
+
+$(eval $(generic-package))