# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7
inherit mount-boot savedconfig

# In case this is a real snapshot, fill in commit below.
# For normal, tagged releases, leave blank
MY_COMMIT=

if [[ ${PV} == 99999999* ]]; then
	inherit git-r3
	EGIT_REPO_URI="https://git.kernel.org/pub/scm/linux/kernel/git/firmware/${PN}.git"
else
	if [[ -n "${MY_COMMIT}" ]]; then
		SRC_URI="https://git.kernel.org/cgit/linux/kernel/git/firmware/linux-firmware.git/snapshot/${MY_COMMIT}.tar.gz -> ${P}.tar.gz"
	else
		SRC_URI="https://mirrors.edge.kernel.org/pub/linux/kernel/firmware/${P}.tar.xz"
	fi

	KEYWORDS="~alpha amd64 arm arm64 ~hppa ~ia64 ~mips ppc ppc64 ~s390 sparc x86"
fi

DESCRIPTION="Linux firmware files"
HOMEPAGE="https://git.kernel.org/?p=linux/kernel/git/firmware/linux-firmware.git"

LICENSE="GPL-2 GPL-2+ GPL-3 BSD MIT || ( MPL-1.1 GPL-2 )
	redistributable? (
		linux-fw-redistributable ( BSD-2 BSD BSD-4 ISC MIT no-source-code ) )
	unknown-license? ( all-rights-reserved )"
SLOT="0"
IUSE="initramfs +redistributable savedconfig unknown-license"
RESTRICT="binchecks strip
	unknown-license? ( bindist )"

REQUIRED_USE="initramfs? ( redistributable )"

BDEPEND="initramfs? ( app-arch/cpio )"

#add anything else that collides to this
RDEPEND="!savedconfig? (
		redistributable? (
			!sys-firmware/alsa-firmware[alsa_cards_ca0132]
			!sys-block/qla-fc-firmware
			!sys-firmware/iwl1000-ucode
			!sys-firmware/iwl6005-ucode
			!sys-firmware/iwl6030-ucode
			!sys-firmware/iwl6050-ucode
			!sys-firmware/iwl3160-ucode
			!sys-firmware/iwl7260-ucode
			!sys-firmware/iwl3160-7260-bt-ucode
		)
		unknown-license? (
			!sys-firmware/alsa-firmware[alsa_cards_korg1212]
			!sys-firmware/alsa-firmware[alsa_cards_maestro3]
			!sys-firmware/alsa-firmware[alsa_cards_sb16]
			!sys-firmware/alsa-firmware[alsa_cards_ymfpci]
		)
	)"

pkg_pretend() {
	use initramfs && mount-boot_pkg_pretend
}

src_unpack() {
	if [[ ${PV} == 99999999* ]]; then
		git-r3_src_unpack
	else
		default
		# rename directory from git snapshot tarball
		if [[ ${#GIT_COMMIT} -gt 8 ]]; then
			mv ${PN}-*/ ${P} || die
		fi
	fi
}

src_prepare() {
	# source and documentation files, not to be installed
	local source_files=(
		README
		WHENCE
		"LICEN[CS]E*"
		"GPL*"
		configure
		Makefile
		check_whence.py
		atusb/ChangeLog
		av7110/Boot.S
		av7110/Makefile
		carl9170fw/
		cis/Makefile
		cis/src/
		dsp56k/bootstrap.asm
		dsp56k/concat-bootstrap.pl
		dsp56k/Makefile
		"isci/*.[ch]"
		isci/Makefile
		isci/README
		"keyspan_pda/*.S"
		keyspan_pda/Makefile
		usbdux/
	)

	# whitelist of images with a free software license
	local free_software=(
		# keyspan_pda (GPL-2+)
		keyspan_pda/keyspan_pda.fw
		keyspan_pda/xircom_pgs.fw
		# dsp56k (GPL-2+)
		dsp56k/bootstrap.bin
		# ath9k_htc (BSD GPL-2+ MIT)
		ath9k_htc/htc_7010-1.4.0.fw
		ath9k_htc/htc_9271-1.4.0.fw
		# pcnet_cs, 3c589_cs, 3c574_cs, serial_cs (dual GPL-2/MPL-1.1)
		cis/LA-PCM.cis
		cis/PCMLM28.cis
		cis/DP83903.cis
		cis/NE2K.cis
		cis/tamarack.cis
		cis/PE-200.cis
		cis/PE520.cis
		cis/3CXEM556.cis
		cis/3CCFEM556.cis
		cis/MT5634ZLX.cis
		cis/RS-COM-2P.cis
		cis/COMpad2.cis
		cis/COMpad4.cis
		# serial_cs (GPL-3)
		cis/SW_555_SER.cis
		cis/SW_7xx_SER.cis
		cis/SW_8xx_SER.cis
		# dvb-ttpci (GPL-2+)
		av7110/bootcode.bin
		# usbdux, usbduxfast, usbduxsigma (GPL-2+)
		usbdux_firmware.bin
		usbduxfast_firmware.bin
		usbduxsigma_firmware.bin
		# brcmfmac (GPL-2+)
		brcm/brcmfmac4330-sdio.Prowise-PT301.txt
		brcm/brcmfmac43340-sdio.meegopad-t08.txt
		brcm/brcmfmac43362-sdio.cubietech,cubietruck.txt
		brcm/brcmfmac43362-sdio.lemaker,bananapro.txt
		brcm/brcmfmac43430a0-sdio.jumper-ezpad-mini3.txt
		"brcm/brcmfmac43430a0-sdio.ONDA-V80 PLUS.txt"
		brcm/brcmfmac43430-sdio.AP6212.txt
		brcm/brcmfmac43430-sdio.Hampoo-D2D3_Vi8A1.txt
		brcm/brcmfmac43430-sdio.MUR1DX.txt
		brcm/brcmfmac43430-sdio.raspberrypi,3-model-b.txt
		brcm/brcmfmac43455-sdio.raspberrypi,3-model-b-plus.txt
		brcm/brcmfmac4356-pcie.gpd-win-pocket.txt
		# isci (GPL-2)
		isci/isci_firmware.bin
		# carl9170 (GPL-2+)
		carl9170-1.fw
		# atusb (GPL-2+)
		atusb/atusb-0.2.dfu
		atusb/atusb-0.3.dfu
		atusb/rzusb-0.3.bin
		# mlxsw_spectrum (dual BSD/GPL-2)
		mellanox/mlxsw_spectrum-13.1420.122.mfa2
		mellanox/mlxsw_spectrum-13.1530.152.mfa2
		mellanox/mlxsw_spectrum-13.1620.192.mfa2
		mellanox/mlxsw_spectrum-13.1702.6.mfa2
		mellanox/mlxsw_spectrum-13.1703.4.mfa2
		mellanox/mlxsw_spectrum-13.1910.622.mfa2
		mellanox/mlxsw_spectrum-13.2000.1122.mfa2
	)

	# blacklist of images with unknown license
	local unknown_license=(
		atmsar11.fw
		korg/k1212.dsp
		ess/maestro3_assp_kernel.fw
		ess/maestro3_assp_minisrc.fw
		yamaha/ds1_ctrl.fw
		yamaha/ds1_dsp.fw
		yamaha/ds1e_ctrl.fw
		tr_smctr.bin
		ttusb-budget/dspbootcode.bin
		emi62/bitstream.fw
		emi62/loader.fw
		emi62/midi.fw
		emi62/spdif.fw
		ti_3410.fw
		ti_5052.fw
		mts_mt9234mu.fw
		mts_mt9234zba.fw
		whiteheat.fw
		whiteheat_loader.fw
		intelliport2.bin
		cpia2/stv0672_vp4.bin
		vicam/firmware.fw
		edgeport/boot.fw
		edgeport/boot2.fw
		edgeport/down.fw
		edgeport/down2.fw
		edgeport/down3.bin
		sb16/mulaw_main.csp
		sb16/alaw_main.csp
		sb16/ima_adpcm_init.csp
		sb16/ima_adpcm_playback.csp
		sb16/ima_adpcm_capture.csp
		sun/cassini.bin
		acenic/tg1.bin
		acenic/tg2.bin
		adaptec/starfire_rx.bin
		adaptec/starfire_tx.bin
		yam/1200.bin
		yam/9600.bin
		3com/3C359.bin
		ositech/Xilinx7OD.bin
		qlogic/isp1000.bin
		myricom/lanai.bin
		yamaha/yss225_registers.bin
		lgs8g75.fw
	)

	default

	# remove sources and documentation (wildcards are expanded)
	rm -r ${source_files[@]} || die
	rm -rf .git

	if use !unknown-license; then
		# remove files in unknown_license
		rm "${unknown_license[@]}" || die
	fi

	if use !redistributable; then
		# remove files _not_ in the free_software or unknown_license lists
		# everything else is confirmed (or assumed) to be redistributable
		# based on upstream acceptance policy
		local IFS=$'\n'
		find ! -type d -printf "%P\n" \
			| grep -Fvx -e "${free_software[*]}" -e "${unknown_license[*]}" \
			| xargs -d '\n' rm || die
		IFS=$' \t\n'
	fi

	if use initramfs; then
		if [[ -d "${S}/amd-ucode" ]]; then
			local UCODETMP="${T}/ucode_tmp"
			local UCODEDIR="${UCODETMP}/kernel/x86/microcode"
			mkdir -p "${UCODEDIR}" || die
			echo 1 > "${UCODETMP}/early_cpio"

			local amd_ucode_file="${UCODEDIR}/AuthenticAMD.bin"
			cat "${S}"/amd-ucode/*.bin > "${amd_ucode_file}" || die "Failed to concat amd cpu ucode"

			if [[ ! -s "${amd_ucode_file}" ]]; then
				die "Sanity check failed: '${amd_ucode_file}' is empty!"
			fi

			pushd "${UCODETMP}" &>/dev/null || die
			find . -print0 | cpio --quiet --null -o -H newc -R 0:0 > "${S}"/amd-uc.img
			popd &>/dev/null || die
			if [[ ! -s "${S}/amd-uc.img" ]]; then
				die "Failed to create '${S}/amd-uc.img'!"
			fi
		else
			# If this will ever happen something has changed which
			# must be reviewed
			die "'${S}/amd-ucode' not found!"
		fi
	fi

	echo "# Remove files that shall not be installed from this list." > ${PN}.conf
	find * ! -type d ! \( -name ${PN}.conf -o -name amd-uc.img \) >> ${PN}.conf

	if use savedconfig; then
		restore_config ${PN}.conf

		ebegin "Removing all files not listed in config"
		find ! -type d ! \( -name ${PN}.conf -o -name amd-uc.img \) -printf "%P\n" \
			| grep -Fvx -f <(grep -v '^#' ${PN}.conf \
				|| die "grep failed, empty config file?") \
			| xargs -d '\n' --no-run-if-empty rm
		eend $? || die
	fi

	# remove empty directories, bug #396073
	find -type d -empty -delete || die
}

src_install() {
	save_config ${PN}.conf
	rm ${PN}.conf || die

	if use initramfs ; then
		mkdir "${ED}/boot" || die
		mv "${S}"/amd-uc.img "${ED}/boot" || die
	fi

	if ! ( shopt -s failglob; : * ) 2>/dev/null; then
		eerror "No files to install. Check your USE flag settings"
		eerror "and the list of files in your saved configuration."
		die "Refusing to install an empty package"
	fi

	insinto /lib/firmware/
	doins -r *
}

pkg_preinst() {
	if use savedconfig; then
		ewarn "USE=savedconfig is active. You must handle file collisions manually."
	fi

	# Make sure /boot is available if needed.
	use initramfs && mount-boot_pkg_preinst
}

pkg_postinst() {
	elog "If you are only interested in particular firmware files, edit the saved"
	elog "configfile and remove those that you do not want."

	local ver
	for ver in ${REPLACING_VERSIONS}; do
		if ver_test ${ver} -lt 20190514; then
			elog
			elog 'Starting with version 20190514, installation of many firmware'
			elog 'files is controlled by USE flags. Please review your USE flag'
			elog 'and package.license settings if you are missing some files.'
			break
		fi
	done

	# Don't forget to umount /boot if it was previously mounted by us.
	use initramfs && mount-boot_pkg_postinst
}

pkg_prerm() {
	# Make sure /boot is mounted so that we can remove /boot/amd-uc.img!
	use initramfs && mount-boot_pkg_prerm
}

pkg_postrm() {
	# Don't forget to umount /boot if it was previously mounted by us.
	use initramfs && mount-boot_pkg_postrm
}