huawei-g7: new device (Huawei Ascend G7) (MR 2287)

The Huawei Ascend G7 is based on Qualcomm MSM8916 and therefore makes
use of linux-postmarketos-qcom-msm8916 as a close-to-mainline kernel.

Initially supported features:
  - USB
  - Storage (eMMC, SD card)
  - Display
  - Touchscreen, Buttons, Vibrator
  - Notification LED
  - WiFi/Bluetooth
  - Accelerometer, Magnetometer, Proximity
  - Audio
  - NFC

The modem needs more work to work around strange Huawei firmware mess.

Note that the Huawei shipped an outdated firmware version that does
not support booting aarch64 kernels (like used in this device port).
However, the device does not verify firmware signatures so it is
possible to flash firmware from other devices. This is mostly
described in the wiki, but unfortunately it's quite complex.

However, the aarch64 version of linux-postmarketos-qcom-msm8916
receives much more testing so I would like to avoid adding more
armv7 MSM8916 devices unless absolutely necessary.

For pointercal:
  Screen dimension 720x1280
  Touchscreen dimension (reported by evtest) 1100x1900
    720/1100*65536 = ~42896
    1280/1900*65536 = ~44151
  Offset doesn't seem to be needed.

[ci:skip-build] already built successfully in CI

device/testing/device-huawei-g7/APKBUILD

+# Reference: <https://postmarketos.org/devicepkg>
+# Maintainer: Minecrell <minecrell@minecrell.net>
+pkgname=device-huawei-g7
+pkgdesc="Huawei Ascend G7"
+pkgver=1
+pkgrel=0
+url="https://postmarketos.org"
+license="MIT"
+arch="aarch64"
+options="!check !archcheck"
+depends="postmarketos-base mkbootimg soc-qcom-msm8916 linux-postmarketos-qcom-msm8916"
+makedepends="devicepkg-dev"
+source="deviceinfo pointercal"
+subpackages="$pkgname-nonfree-firmware:nonfree_firmware"
+
+build() {
+	devicepkg_build $startdir $pkgname
+}
+
+package() {
+	devicepkg_package $startdir $pkgname
+	install -D -m644 "$srcdir"/pointercal "$pkgdir"/etc/pointercal
+}
+
+nonfree_firmware() {
+	pkgdesc="GPU/WiFi/BT/Video firmware"
+	depends="linux-firmware-qcom firmware-qcom-msm8916-wcnss firmware-huawei-g7-wcnss-nv"
+	mkdir "$subpkgdir"
+}
+
+sha512sums="9631a0ef5e6e9a63a919d45a8d604b89589672fdb3b24c68e5e33b7edb26a72de6cb82efffb89bfa0be0a2678a626044e615b03af6595b5cc9fc83c9bc763031  deviceinfo
+b47b3eee3f330408ea28f89b0a70752466f1ab854fc7c4677157fd2dcf5a546d1056b1fbfac587ece827b7ae864e969f0fef6981e4e9802b159f88d03fe9b487  pointercal"

device/testing/device-huawei-g7/deviceinfo

+# Reference: <https://postmarketos.org/deviceinfo>
+# Please use double quotes only. You can source this file in shell scripts.
+
+deviceinfo_format_version="0"
+deviceinfo_name="Huawei Ascend G7"
+deviceinfo_manufacturer="Huawei"
+deviceinfo_codename="huawei-g7"
+deviceinfo_year="2014"
+deviceinfo_dtb="qcom/msm8916-huawei-g7"
+deviceinfo_append_dtb="true"
+deviceinfo_modules_initfs="panel-huawei-tianma-nt35521 msm rmi-i2c"
+deviceinfo_arch="aarch64"
+
+# Device related
+deviceinfo_chassis="handset"
+deviceinfo_keyboard="false"
+deviceinfo_external_storage="true"
+deviceinfo_screen_width="720"
+deviceinfo_screen_height="1280"
+deviceinfo_getty="ttyMSM0;115200"
+
+# Bootloader related
+deviceinfo_flash_method="fastboot"
+deviceinfo_kernel_cmdline="earlycon console=ttyMSM0,115200 PMOS_NO_OUTPUT_REDIRECT"
+deviceinfo_generate_bootimg="true"
+deviceinfo_flash_offset_base="0x80000000"
+deviceinfo_flash_offset_kernel="0x00080000"
+deviceinfo_flash_offset_ramdisk="0x02000000"
+deviceinfo_flash_offset_second="0x00f00000"
+deviceinfo_flash_offset_tags="0x01e00000"
+deviceinfo_flash_pagesize="2048"
+deviceinfo_flash_sparse="true"

device/testing/device-huawei-g7/pointercal

+42896 0 0 0 44151 0 65536 720 1280 0

device/testing/firmware-huawei-g7/APKBUILD

+pkgname=firmware-huawei-g7
+pkgver=1
+pkgrel=0
+pkgdesc="Firmware for Huawei Ascend G7"
+url="https://postmarketos.org"
+subpackages="$pkgname-wcnss-nv:wcnss_nv"
+arch="aarch64"
+license="proprietary"
+options="!check !strip !archcheck !tracedeps pmb:cross-native"
+source="$pkgname-WCNSS_qcom_wlan_nv.bin.base64::https://pastebin.com/raw/UmTSZBW7"
+
+_fwdir="/lib/firmware/postmarketos"
+
+unpack() {
+	default_unpack
+	base64 -d $pkgname-WCNSS_qcom_wlan_nv.bin.base64 > WCNSS_qcom_wlan_nv.bin
+}
+
+package() {
+	# parent package is empty
+	mkdir -p "$pkgdir"
+}
+
+wcnss_nv() {
+	pkgdesc="Huawei Ascend G7 WiFi/BT firmware configuration"
+	install -Dm644 "$srcdir"/WCNSS_qcom_wlan_nv.bin -t "$subpkgdir/$_fwdir"/wlan/prima
+}
+
+sha512sums="0202ce7d2f736a6a2d37ab571233d715376184c647ba916d9e3e9aaf1408f1aa41f877d6f805d274ead1440dabf295e7477da6957555604cee90ecd5a9a3a24b  firmware-huawei-g7-WCNSS_qcom_wlan_nv.bin.base64"