SECTION = "kernel"
DESCRIPTION = "Linux kernel for Microchip ARM SoCs (aka AT91)"
SUMMARY = "Linux kernel for Microchip ARM SoCs (aka AT91)"
LICENSE = "GPLv2"
LIC_FILES_CHKSUM = "file://COPYING;md5=bbea815ee2795b2f4230826c0c6b8814"

inherit kernel
# mts class to build dtb and append to kernel image
inherit linux-append-dtb

KERNEL_EXTRA_ARGS ="LOADADDR=0x20008000"

RDEPENDS_${KERNEL_PACKAGE_NAME}-base = ""
RDEPENDS_kernel-modules_remove = "kernel-module-softdog"
FILESEXTRAPATHS_prepend := "${THISDIR}/${P}:"

SRCREV = "ae7a63c21ca8d85578db1acef1dae5a5c803a8a3"
SRCREV_sama7g5ek = "d67f0979dcc377863060e803a2280b7a7e1a22c0"

PR = "r2"
KERNEL_VERSION = "${PV}"
KERNEL_REVISION = "${PR}"
EXTRAVERSION = ""

S = "${WORKDIR}/linux4sam-${PV}"

KBRANCH = "linux-5.4-at91"
KBRANCH_sama7g5ek-sd = "sama7g5_early"
KBRANCH_sama7g5ek-emmc = "sama7g5_early"
SRC_URI[sha256sum] = "31dbc76e89ad1b8dc2d1b7c52533411b0664e80c5e29c903878eb7167c384e55"
DEFCONFIG="${@oe.utils.conditional('BB_USE_SD', '1', 'defconfig-sd', 'defconfig-n', d)}"

SRC_URI = "https://www.multitech.net/mlinux/sources/linux4sam-${PV}.tar.xz"
SRC_URI += "file://${DEFCONFIG}"
SRC_URI_remove_sama7g5ek = "file://${DEFCONFIG}"

KERNEL_MODULE_PACKAGE_SUFFIX=""

COMMON_PATCHES = " \
		  file://${DEFCONFIG} \
		  file://linux-5.4-at91sam9_wdt-10second-timeout.patch \
		  file://linux-5.4-export-mmc_pwrseq_alloc.patch \
		  file://linux-5.4-spidev_squack.patch \
		  file://linux-5.4-add-num_accessory_ports-config-option.patch \
		  file://linux-5.4-cdc-acm-ignore-exar-devices.patch \
		  file://EXTRAVERSION.patch \
		  file://linux-5.4-addl-time-for-pmeccerrloc.patch \
		  file://linux-5.4-OF-DT-Overlay-configfs-interface.patch \
		  file://linux-5.4-revert-net-macb-Properly-handle-phylink-on-at91rm9200.patch \
		  file://linux-5.4-bring-back-PAE-bit-and-fix-NCFGR-values-applicable-f.patch \
		  file://linux-5.4-quiet-overlay.patch \
		  file://linux-5.4-bluetooth-connections.patch \
		  file://mt-at91.h \
"

SRC_URI_append_mtcdt = "\
            ${COMMON_PATCHES} \
            file://linux-5.4-reserve-5-bit-serial-for-multidrop.patch \
            file://linux-5.4-rs485-atmel-crtscts.patch \
            file://linux-5.4-module-taint.patch \
            "

SRC_URI_append_mtrv1 = "\
            ${COMMON_PATCHES} \
            file://linux-5.4-module-taint.patch \
            "
SRC_URI_append_mtcap = "\
            ${COMMON_PATCHES} \
            "
SRC_URI_append_mtr = "\
            ${COMMON_PATCHES} \
            file://linux-5.4-fix-atmel-mci-reg-overloading.patch \
            file://linux-5.4-wl12xx_enable_disable.patch \
            "
SRC_URI_append_mtre = "\
            ${COMMON_PATCHES} \
            "

KERNEL_MODULE_AUTOLOAD_mtcap_append += "i2c-dev"
KERNEL_MODULE_AUTOLOAD_mtcdt_append += "i2c-dev"

python __anonymous () {
    if d.getVar('UBOOT_FIT_IMAGE', True) == 'xyes':
        d.appendVar('DEPENDS', ' u-boot-mkimage-native dtc-native')
}

copy_mts_dts_files () {
    # Install MTS device tree files
    cp -f ${THISDIR}/${PN}-${PV}/mts-dts/${MACHINE}.dts ${S}/arch/${ARCH}/boot/dts/
    cp -f ${THISDIR}/${PN}-${PV}/mt-at91.h ${S}/include/dt-bindings/gpio
}

python do_unpack_append () {
    bb.build.exec_func('copy_mts_dts_files', d)
}

# Files needed to build external kernel modules.
do_shared_workdir_append() {
    install -d -m 755 ${STAGING_KERNEL_BUILDDIR}/include/config
    cp -a ${B}/include/config ${STAGING_KERNEL_BUILDDIR}/include/
    cp -a ${B}/scripts ${STAGING_KERNEL_BUILDDIR}
    echo ${PR} > ${STAGING_KERNEL_BUILDDIR}/mlinux_pr
}

do_configure_prepend() {
        # Kernel bbclass requires defconfig be named defconfig.
        cp ${WORKDIR}/${DEFCONFIG} ${WORKDIR}/defconfig
        echo "WORKDIR is ${WORKDIR} S is ${S}"
	if [ ! -f "${WORKDIR}/defconfig" ] && [ -n "${KBUILD_DEFCONFIG}" ]; then
		if [ -f "${S}/arch/${ARCH}/configs/${KBUILD_DEFCONFIG}" ]; then
			cp -f ${S}/arch/${ARCH}/configs/${KBUILD_DEFCONFIG} ${WORKDIR}/defconfig
                        bbnote "copied ${S}/arch/${ARCH}/configs/${KBUILD_DEFCONFIG} to {$WORKDIR}"
                else
                        bbfatal "A KBUILD_DEFCONFIG '${KBUILD_DEFCONFIG}' was specified, but not present in the source tree"
                fi
        fi
}

do_configure_append() {
	frags=""
	for fragment in ${WORKDIR}/*.cfg
	do
		if [ -f ${fragment} ]; then
			cp -v ${fragment} ${B}
			frags=$frags" `basename ${fragment}`"
		fi
	done

	if [ ! -z "${frags}" ]; then
		echo "Fragments are: ${frags}"
		PATH=${S}/scripts/kconfig:${PATH}
		CFLAGS="${CFLAGS} ${TOOLCHAIN_OPTIONS}" HOSTCC="${BUILD_CC} ${BUILD_CFLAGS} ${BUILD_LDFLAGS}" HOSTCPP="${BUILD_CPP}" CC="${KERNEL_CC}" ARCH=${ARCH} merge_config.sh -n .config ${frags}  2>&1
		if [ $? -ne 0 ]; then
			bbfatal_log "Could not configure kernel fragments: ${frags}"
		fi
	fi
}

do_deploy_append() {
	if [ "${UBOOT_FIT_IMAGE}" = "xyes" ]; then
		DTB_PATH="${B}/arch/${ARCH}/boot/dts/"
		if [ ! -e "${DTB_PATH}" ]; then
			DTB_PATH="${B}/arch/${ARCH}/boot/"
		fi

		if [ -e ${S}/arch/${ARCH}/boot/dts/${MACHINE}.its ]; then
			cp ${S}/arch/${ARCH}/boot/dts/${MACHINE}*.its ${DTB_PATH}
			cd ${DTB_PATH}
			mkimage -f ${MACHINE}.its ${MACHINE}.itb
			install -m 0644 ${MACHINE}.itb ${DEPLOYDIR}/${MACHINE}.itb
			cd -
		fi
	fi
}

DTB_APPEND_mtcdt = "mtcdt"
DTB_APPEND_mtrv1 = "mtrv1"
DTB_APPEND_mtcap = "mtcap"
DTB_APPEND_mtr = "mtr"
DTB_APPEND_mtre = "mtre"

COMPATIBLE_MACHINE = "(mtcdt|mtrv1|mtr|mtcap|mths|mtre)"

NET_LOAD_ALL_MACHINES += " \
	8021q \
	bnep \
	br_netfilter \
	dns_resolver \
	garp \
	ip6_gre \
	ip6table_filter \
	ip6table_mangle \
	ip6table_nat \
	ip6table_raw \
	ip6t_ah \
	ip6t_eui64 \
	ip6t_frag \
	ip6t_hbh \
	ip6t_ipv6header \
	ip6t_MASQUERADE \
	ip6t_mh \
	ip6t_NPT \
	ip6t_REJECT \
	ip6t_rpfilter \
	ip6t_rt \
	ip6t_SYNPROXY \
	ip6_vti \
	ipip \
	iptable_mangle \
	iptable_nat \
	iptable_netfilter \
	iptable_raw \
	ip_tables \
	ipt_ah \
	ip_vs \
	l2tp_ppp \
	mac80211 \
	mrp \
	nf_conntrack_ipv4 \
	nf_conntrack_ipv6 \
	nf_conntrack_netbios_ns \
	nf_conntrack_netlink \
	nf_log_ipv4 \
	nf_log_ipv6 \
	nf_nat_ftp \
	nf_nat_h323 \
	nf_nat_pptp \
	nf_nat_sip \
	nf_nat_snmp_basic \
	nfnetlink_cttimeout \
	nf_tables_inet \
	nf_tables_netdev \
	nft_exthdr \
	nft_meta \
	p8022 \
	psnap \
	rfcomm \
	rfkill-gpio \
	rfkill-regulator \
	sit \
	tun \
	xfrm6_mode_tunnel \
	xt_CLASSIFY \
	xt_connmark \
	xt_conntrack \
	xt_CT \
	xt_ecn \
	xt_esp \
	xt_hashlimit \
	xt_hl \
	xt_HL \
	xt_iprange \
	xt_l2tp \
	xt_LED \
	xt_limit \
	xt_LOG \
	xt_mac \
	xt_mark \
	xt_multiport \
	xt_nat \
	xt_NETMAP \
	xt_NFLOG \
	xt_NFQUEUE \
	xt_policy \
	xt_recent \
	xt_REDIRECT \
	xt_set \
	xt_state \
	xt_tcpudp \
	xt_TEE \
	xt_time \
	xt_TPROXY \
	ledtrig-netdev \
"

DRIVER_LOAD_ALL_MACHINES =  " \
	atmel_usba_udc \
	ledtrig-default-on \
	ledtrig-heartbeat \
	ledtrig-timer \
"

KERNEL_MODULE_AUTOLOAD_mtcdt += " \
	g_serial \
	softdog \
"

KERNEL_MODULE_AUTOLOAD_mtcdt += " \
	${NET_LOAD_ALL_MACHINES} \
	${DRIVER_LOAD_ALL_MACHINES} \
"
KERNEL_MODULE_AUTOLOAD_mtrv1 += " \
	${NET_LOAD_ALL_MACHINES} \
	${DRIVER_LOAD_ALL_MACHINES} \
"
KERNEL_MODULE_AUTOLOAD_mtr += " \
	${NET_LOAD_ALL_MACHINES} \
	${DRIVER_LOAD_ALL_MACHINES} \
"
KERNEL_MODULE_AUTOLOAD_mtcap += " \
	${NET_LOAD_ALL_MACHINES} \
	${DRIVER_LOAD_ALL_MACHINES} \
"
KERNEL_MODULE_AUTOLOAD_mtre += " \
	${NET_LOAD_ALL_MACHINES} \
	${DRIVER_LOAD_ALL_MACHINES} \
"

# Never delete /boot, as it poisons the overlay
# and you cannot get it back.
pkg_preinst_kernel-image-uimage() {
    set -x
    if [ -d /boot ] ; then
        cd /boot
        rm -rf /boot/{*,.*} 2>/dev/null || true
    else
        mkdir -m 0755 /boot
    fi
    mkdir -m 0755 /var/volatile/boot 2>/dev/null || true
    mount -o bind /var/volatile/boot /boot
}

pkg_prerm_kernel-image-uimage() {
        umount -lf /boot || true
        rm -rf /var/volatile/boot || true
        rm -rf /boot/{*,.*} 2>/dev/null || true
}

PACKAGES =+ "kernel-image-uimage-inst"
# Not sure how to get the name below generated automatically
RDEPENDS_kernel-image-uimage-inst += "kernel-image-uimage-${PV}"
ALLOW_EMPTY_kernel-image-uimage-inst = "1"

pkg_postinst_kernel-image-uimage-inst() {
	# Only installs all the kernel on the device (D is defined in bitbake)
	if [[ -z "$D" ]] ; then
	    logger -s -p user.info -t opkg "Upgrading kernel ${PV} -- poweroff will create an unbootable device"
	    set -x
	    kernel_mtd="/dev/$(cat /proc/mtd | grep '\"uImage\"' | cut -d : -f 1)"
	    flash_erase ${kernel_mtd} 0 0
	    if nandwrite -p ${kernel_mtd} /boot/uImage-${PV} ; then
                echo 'Kernel image update is successful'
            fi
	    set +x
	fi
}