i9195/Qualcomm modem support (#1314)

* Qualcomm MSM modem: 'rmtfs' support packages
* qcom_rmtfs: Server that talks to modem over IPC to allow it
  read/write data for its persistent storage. This is needed for it to
  boot, as well as periodically during usage. Added a patch that
  it expects the storage path symlinks in /etc instead of /boot.
* qrtr: IPC library for rmtfs
* libqipcrtr4msmipc: adapter library to make qrtr work on kernels with
  AF_MSM_IPC support. AF_QIPCRTR is the mainline equivalent since Linux
  ~4.7.
* msmipc-dev: Header files for qrtr and libqipcrtr4msmipc.
  Thanks to Bjorn Andersson <https://github.com/andersson> for rmtfs and
  qrtr.
* libsmdpkt_wrapper: adapter lib for QMI clients
  The SMD serial packet driver in Qualcomm kernels has, AFAICT, a bug
  in poll(); this works around it so that qmicli et al can work.
* i9195: firmware (modem only right now)
* add ofono (with patch for MSM devices)
  Based on Alpine's package.
* i9195: add modem support
* move all modem related packages to aports/modem

device/device-samsung-i9195/APKBUILD

@@ -1,13 +1,14 @@
 # Reference: <https://postmarketos.org/devicepkg>
 pkgname="device-samsung-i9195"
 pkgdesc="Samsung Galaxy S4 Mini"
-pkgver=0.2
-pkgrel=4
+pkgver=0.3
+pkgrel=0
 url="https://postmarketos.org"
 license="MIT"
 arch="noarch"
 options="!check"
 depends="postmarketos-base linux-samsung-i9195 mkbootimg"
+subpackages="$pkgname-nonfree-firmware:nonfree_firmware $pkgname-rmtfs"
 makedepends="devicepkg-dev"
 source="deviceinfo"
 
@@ -19,4 +20,22 @@ package() {
 	devicepkg_package $startdir $pkgname
 }
 
+nonfree_firmware() {
+	pkgdesc="Modem firmware"
+	# Non-firmware packages placed here, because they aren't useful without firmware
+	depends="firmware-samsung-i9195-modem qcom_rmtfs libqipcrtr4msmipc libsmdpkt_wrapper"
+	mkdir "$subpkgdir"
+}
+
+rmtfs() {
+	install_if="$pkgname qcom_rmtfs"
+
+	local _linkpath="$subpkgdir"/etc/qcom_rmtfs/partition-symlinks
+	mkdir -p $_linkpath
+	cd $_linkpath
+	ln -s /dev/disk/by-partlabel/modemst1   modem_fs1
+	ln -s /dev/disk/by-partlabel/modemst2   modem_fs2
+	ln -s /dev/disk/by-partlabel/fsg        modem_fsg
+}
+
 sha512sums="8e4ff08c7f2a7e7c55370be0547908b088bdb96e1d51d45e8d2840958bacb31fab0b9774b29332509270b2e18d8b569a159ed96fc9c6c2ed2f360fbb9b5cb26e  deviceinfo"

device/linux-samsung-i9195/APKBUILD

@@ -1,4 +1,4 @@
-# Kernel config based on: arch/arm/configs/samsung_serrano_defconfig
+# Kernel config based on: arch/arm/configs/{samsung_serrano_defconfig, msm8930_serrano_eur_lte_defconfig}
 
 pkgname="linux-samsung-i9195"
 pkgver=3.4.113

firmware/firmware-samsung-i9195/APKBUILD

@@ -0,0 +1,29 @@
+pkgname=firmware-samsung-i9195
+# XDA post explains the meaning of the firmware version, which I've translated into pkgver
+pkgver=201707.1
+_ver=I9195XXUCQG1
+pkgrel=0
+pkgdesc="Samsung Galaxy S 4 Mini firmware"
+subpackages="$pkgname-modem"
+url="https://forum.xda-developers.com/galaxy-s4-mini/general/modem-samsung-galaxy-s4-mini-gt-i9195-t3390780"
+arch="noarch"
+license="proprietary"
+options="!strip !archcheck"
+
+source="$_ver.tar.xz::https://drive.google.com/uc?export=download&id=1bKQ6m9avN6k2puJTZr55dIeGb8B7K_lT"
+
+package() {
+	# parent package is empty
+	mkdir -p "$pkgdir"
+}
+
+modem() {
+	pkgdesc="Samsung Galaxy S 4 Mini modem firmware"
+
+	cd "$srcdir"
+	for _i in *.b?? *.mdt; do
+		install -Dm644 $_i "$subpkgdir"/lib/firmware/postmarketos/$_i
+	done
+}
+
+sha512sums="32e27bf12f40abd9a049562e4830d061518bd9efaf991cdc48c1aa3736bdc8c581eea14fa240fbaead255f83c7692d186f53a491837a662ac6368ca943634684  I9195XXUCQG1.tar.xz"

modem/libqipcrtr4msmipc/APKBUILD

@@ -0,0 +1,23 @@
+pkgname=libqipcrtr4msmipc
+pkgver=0.1
+pkgrel=0
+pkgdesc="LD_PRELOADable library to emulate AF_QIPCRTR socket on devices with only AF_MSM_IPC"
+url="https://github.com/scintill/libqipcrtr4msmipc"
+arch="armhf aarch64"
+license="GPL-3.0-or-later"
+_tag="v${pkgver}"
+makedepends="msmipc-dev"
+source="$pkgname-$_tag.tar.gz::https://github.com/scintill/libqipcrtr4msmipc/archive/${_tag}.tar.gz"
+options="!check"
+builddir="$srcdir/libqipcrtr4msmipc-$pkgver"
+
+build() {
+	cd "$builddir"
+	make C_INCLUDE_PATH=/usr/src/msmipc-dev/include
+}
+
+package() {
+	install -Dm644 "$builddir"/libqipcrtr4msmipc.so "$pkgdir"/usr/lib/preload/libqipcrtr4msmipc.so
+}
+
+sha512sums="5fd22a64d1f5dc743de2d485e3ec5c264abed4af4b63204f73a750847c15c2f91c3d0cf350bb341b61650ecb43e103475f81d77ad7b6ebb43751dcda3abb22d7  libqipcrtr4msmipc-v0.1.tar.gz"

modem/libsmdpkt_wrapper/APKBUILD

@@ -0,0 +1,26 @@
+pkgname=libsmdpkt_wrapper
+pkgver=0.1
+pkgrel=0
+pkgdesc="wrapper to get ofonod and qmicli working on smdpkt devices (MSM kernel's SMD)"
+url="https://github.com/scintill/libsmdpkt_wrapper"
+arch="all"
+license="GPL-3.0-or-later"
+subpackages="$pkgname-doc"
+_tag=v$pkgver
+makedepends="linux-headers"
+source="$pkgname-$_tag.tar.gz::https://github.com/scintill/libsmdpkt_wrapper/archive/$_tag.tar.gz"
+builddir="$srcdir""/libsmdpkt_wrapper-${pkgver}"
+options="!check"
+
+build() {
+	cd "$builddir"
+	make
+}
+
+package() {
+	cd "$builddir"
+	install -Dm644 libsmdpkt_wrapper.so "$pkgdir"/usr/lib/preload/libsmdpkt_wrapper.so
+	install -Dm644 COPYING "$pkgdir"/usr/share/licenses/$pkgname/COPYING
+}
+
+sha512sums="4979ef87523585ac2baaa901680a4f55fe11036ea591ecd43efc2c48f1681ff79699f7a4896e905397a87bbfb380c94f84f09bb48eb7db42ebfe73f26f95bbe2  libsmdpkt_wrapper-v0.1.tar.gz"

modem/msmipc-dev/APKBUILD

@@ -0,0 +1,30 @@
+pkgname=msmipc-dev
+pkgver=0.1
+pkgrel=0
+pkgdesc="Headers for Qualcomm MSM IPC (AF_MSM_IPC and AF_QRTR)"
+url="https://android.googlesource.com/kernel/msm/+/e63c5a50c9379ccbee4c7f0e6ba43394e9d89db4/include/linux/msm_ipc.h"
+arch="noarch"
+depends="linux-headers"
+license="GPL-2.0 WITH Linux-syscall-note"
+source="
+	https://github.com/torvalds/linux/raw/0573fed92b671bfe6a302c67bb66471b18a5004d/include/uapi/linux/qrtr.h
+	msm_ipc.h.base64::https://android.googlesource.com/kernel/msm/+/e63c5a50c9379ccbee4c7f0e6ba43394e9d89db4/include/linux/msm_ipc.h?format=TEXT
+	"
+options="!check"
+
+unpack() {
+	default_unpack
+
+	cd $srcdir
+	base64 -d msm_ipc.h.base64 > msm_ipc.h
+}
+
+package() {
+	cd "$srcdir"
+	for f in qrtr.h msm_ipc.h; do
+		install -Dm644 $f "$pkgdir"/usr/src/msmipc-dev/include/linux/$f
+	done
+}
+
+sha512sums="1d424b43806930df079041c97db734572b48848b38b37852c3376a5e69e5257f24684f29381891f164d36cac7fbce2746f9580c0aab4ef4d92b8c72cadcb888c  qrtr.h
+c626c03b567b3e12ca0e7d7d89f7c308f1ca3782c163112a04076060a79a91c1192ffb695ab99b28a952021449657b0fdf1912873b7ca05a16a9848f896ea8d0  msm_ipc.h.base64"

modem/ofono/APKBUILD

@@ -0,0 +1,44 @@
+# Based on https://git.alpinelinux.org/cgit/aports/tree/testing/ofono/APKBUILD?id=014ae282b4a9152a5b64451f2815f34fcb53507c
+pkgname=ofono
+_upstreamver=1.21
+pkgver=1.21_p20180307
+pkgrel=0
+pkgdesc="Infrastructure for building mobile telephony (GSM/UMTS) applications"
+url="https://01.org/ofono"
+arch="all"
+license="GPL2"
+depends="bluez mobile-broadband-provider-info"
+makedepends="glib-dev dbus-dev eudev-dev
+	linux-headers bsd-compat-headers libexecinfo-dev
+	mobile-broadband-provider-info"
+options="!check"
+subpackages="$pkgname-dev $pkgname-doc"
+source="https://www.kernel.org/pub/linux/network/$pkgname/$pkgname-$_upstreamver.tar.xz
+	$pkgname.initd
+	0001-nokia-gpio-do-not-create-links-to-gpios-in-dev-cmt.patch::https://git.alpinelinux.org/cgit/aports/plain/testing/ofono/0001-nokia-gpio-do-not-create-links-to-gpios-in-dev-cmt.patch?id=014ae282b4a9152a5b64451f2815f34fcb53507c
+	support-smdpkt.patch"
+
+builddir="$srcdir"/$pkgname-$_upstreamver
+
+build() {
+	cd "$builddir"
+	./configure \
+		--prefix=/usr \
+		--sysconfdir=/etc \
+		--localstatedir=/var \
+		--sbindir=/usr/sbin
+	make
+}
+
+package() {
+	cd "$builddir"
+	make DESTDIR="$pkgdir" install
+	install -Dm644 "$srcdir/$pkgname-${_upstreamver}/plugins/ofono.rules" "$pkgdir/usr/lib/udev/rules.d/60-ofono.rules"
+	install -Dm644 "$srcdir/$pkgname-${_upstreamver}/plugins/ofono-smdpkt.rules" "$pkgdir/usr/lib/udev/rules.d/60-ofono-smdpkt.rules"
+	install -Dm755 "$srcdir/$pkgname.initd" "$pkgdir/etc/init.d/$pkgname"
+}
+
+sha512sums="bbc7fdb1d05294839eee5f31ec345866315a80feac8ccc2a67e0ca2c1030c55e0fb4fd6faee82133c00ec287730a5fd8df0610146a4f6a099e6b90703e621945  ofono-1.21.tar.xz
+fd0d303ca71df6953155aac0624c847f273030ebc5fb12efe2fa2ae7b8d75380e2885ab08d9c65c80cf756ef952569832ffdc25317e86a99552b4caac322b3ed  ofono.initd
+a1f66f3f40c1aa4af5f5b66436414408b46f3c90f2a2c88fa12e09ca6a1732334d2f47687478d652a3a176ee93c1905752635246fd01412834565626c021ca64  0001-nokia-gpio-do-not-create-links-to-gpios-in-dev-cmt.patch
+1eb3fb4e6181e9b4f0afd1b68045750229e6c383380b98111d8238b397ea8dd26dda40b16d64f56f5187fafa97c0613139393e62a1ce58d2631a072903c273a4  support-smdpkt.patch"

modem/ofono/ofono.initd

@@ -0,0 +1,21 @@
+#!/sbin/runscript
+# Copyright 1999-2009 Gentoo Foundation
+# Distributed under the terms of the GNU General Purpose License v2
+# $Header: ./gentoo-x86-cvsroot/net-misc/ofono/files/ofono.initd,v 1.1 2009/08/24 13:20:40 dagger Exp $
+
+depend() {
+   need dbus
+}
+
+start() {
+   ebegin "Starting oFono"
+   # libsmdpkt_wrapper.so may not exist, if this device doesn't need it
+   start-stop-daemon --start --quiet --exec /usr/bin/env LD_PRELOAD=/usr/lib/preload/libsmdpkt_wrapper.so /usr/sbin/ofonod
+   eend $?
+}
+
+stop() {
+   ebegin "Stopping oFono"
+   start-stop-daemon --stop --quiet --exec /usr/sbin/ofonod
+   eend $?
+}

modem/ofono/support-smdpkt.patch

@@ -0,0 +1,89 @@
+diff -rN -U3 a/plugins/ofono-smdpkt.rules b/plugins/ofono-smdpkt.rules
+--- a/plugins/ofono-smdpkt.rules	1970-01-01 00:00:00.000000000 +0000
++++ b/plugins/ofono-smdpkt.rules	2018-03-08 05:46:35.000000000 +0000
+@@ -0,0 +1,2 @@
++# SMD serial device on MSM devices
++KERNEL=="smdcntl0", ENV{OFONO_DRIVER}="gobi"
+diff -rN -U3 a/plugins/udevng.c b/plugins/udevng.c
+--- a/plugins/udevng.c	2017-10-05 14:32:37.000000000 +0000
++++ b/plugins/udevng.c	2018-03-08 05:29:16.000000000 +0000
+@@ -201,39 +201,43 @@
+ 
+ 	DBG("%s", modem->syspath);
+ 
+-	for (list = modem->devices; list; list = list->next) {
+-		struct device_info *info = list->data;
++	if (modem->type != MODEM_TYPE_SERIAL) {
++		for (list = modem->devices; list; list = list->next) {
++			struct device_info *info = list->data;
+ 
+-		DBG("%s %s %s %s %s %s", info->devnode, info->interface,
+-						info->number, info->label,
+-						info->sysattr, info->subsystem);
++			DBG("%s %s %s %s %s %s", info->devnode, info->interface,
++							info->number, info->label,
++							info->sysattr, info->subsystem);
+ 
+-		if (g_strcmp0(info->subsystem, "usbmisc") == 0) /* cdc-wdm */
+-			qmi = info->devnode;
+-		else if (g_strcmp0(info->subsystem, "net") == 0) /* wwan */
+-			net = info->devnode;
+-		else if (g_strcmp0(info->subsystem, "tty") == 0) {
+-			if (g_strcmp0(info->interface, "255/255/255") == 0) {
+-				if (g_strcmp0(info->number, "00") == 0)
+-					diag = info->devnode; /* ec20 */
+-				else if (g_strcmp0(info->number, "01") == 0)
+-					diag = info->devnode; /* gobi */
+-				else if (g_strcmp0(info->number, "02") == 0)
+-					mdm = info->devnode; /* gobi */
+-				else if (g_strcmp0(info->number, "03") == 0)
+-					gps = info->devnode; /* gobi */
+-			} else if (g_strcmp0(info->interface, "255/0/0") == 0) {
+-				if (g_strcmp0(info->number, "01") == 0)
+-					gps = info->devnode; /* ec20 */
+-				if (g_strcmp0(info->number, "02") == 0)
+-					mdm = info->devnode; /* ec20 */
+-				/* ignore the 3rd device second AT/mdm iface */
++			if (g_strcmp0(info->subsystem, "usbmisc") == 0) /* cdc-wdm */
++				qmi = info->devnode;
++			else if (g_strcmp0(info->subsystem, "net") == 0) /* wwan */
++				net = info->devnode;
++			else if (g_strcmp0(info->subsystem, "tty") == 0) {
++				if (g_strcmp0(info->interface, "255/255/255") == 0) {
++					if (g_strcmp0(info->number, "00") == 0)
++						diag = info->devnode; /* ec20 */
++					else if (g_strcmp0(info->number, "01") == 0)
++						diag = info->devnode; /* gobi */
++					else if (g_strcmp0(info->number, "02") == 0)
++						mdm = info->devnode; /* gobi */
++					else if (g_strcmp0(info->number, "03") == 0)
++						gps = info->devnode; /* gobi */
++				} else if (g_strcmp0(info->interface, "255/0/0") == 0) {
++					if (g_strcmp0(info->number, "01") == 0)
++						gps = info->devnode; /* ec20 */
++					if (g_strcmp0(info->number, "02") == 0)
++						mdm = info->devnode; /* ec20 */
++					/* ignore the 3rd device second AT/mdm iface */
++				}
+ 			}
+ 		}
+-	}
+ 
+-	if (qmi == NULL || mdm == NULL || net == NULL)
+-		return FALSE;
++		if (qmi == NULL || mdm == NULL || net == NULL)
++			return FALSE;
++	} else {
++		qmi = modem->serial->devnode;
++	}
+ 
+ 	DBG("qmi=%s net=%s mdm=%s gps=%s diag=%s", qmi, net, mdm, gps, diag);
+ 
+@@ -1708,6 +1712,7 @@
+ 		return;
+ 
+ 	udev_enumerate_add_match_subsystem(enumerate, "tty");
++	udev_enumerate_add_match_subsystem(enumerate, "smdpkt");
+ 	udev_enumerate_add_match_subsystem(enumerate, "usb");
+ 	udev_enumerate_add_match_subsystem(enumerate, "usbmisc");
+ 	udev_enumerate_add_match_subsystem(enumerate, "net");

modem/qcom_rmtfs/APKBUILD

@@ -0,0 +1,38 @@
+pkgname=qcom_rmtfs
+pkgver=0.0_git20180131
+pkgrel=0
+pkgdesc="Qualcomm Remote Filesystem Service Implementation"
+url="https://github.com/andersson/rmtfs"
+arch="all"
+license="BSD-3-Clause"
+depends="qrtr"
+makedepends="eudev-dev qrtr-dev msmipc-dev"
+subpackages="$pkgname-doc"
+_commit="0f800fa4334b03a47941ce1b577f51a69552e414"
+source="
+	rmtfs.tgz::https://github.com/andersson/rmtfs/archive/"$_commit".tar.gz
+	support-uio.patch
+	point-storage-to-paths-in-etc.patch
+	qcom_rmtfs.initd
+	"
+builddir="$srcdir""/rmtfs-"$_commit
+options="!check"
+install="$pkgname.post-install"
+
+build() {
+	cd "$builddir"
+	make C_INCLUDE_PATH=/usr/src/msmipc-dev/include rmtfs
+}
+
+package() {
+	cd "$builddir"
+	install -D -m 755 rmtfs "$pkgdir"/usr/sbin/"$pkgname"
+	mkdir -p "$pkgdir"/etc/qcom_rmtfs/partition-symlinks
+	install -Dm755 "$srcdir/$pkgname.initd" "$pkgdir/etc/init.d/$pkgname"
+	install -Dm644 LICENSE "$pkgdir"/usr/share/licenses/$pkgname/COPYING
+}
+
+sha512sums="4b49cdf9d778bf6ae5e838c1da48e76b1004786a0dafefb0097fe3a73e4652c13ed1b011c051a712017f10b43ffc96b2fa133809715577b65fa4ca30cbdc191b  rmtfs.tgz
+a216dc36a7f12bbc125120ac7cc3e3030f3718f7d894c9e6d5e586375cbd76eae897160fdf780da8e3089dbfc0a31f1631dca4a2e850e193135ab825aa8d05cf  support-uio.patch
+3d205bb7e662cca2a3c87a57c1a129cf6c42afbe179f810069843f521decfd869bc82d1c1a367c507eaf880cf33316a2f7b3dbce9c2d9e8150b1500c3910c843  point-storage-to-paths-in-etc.patch
+21f5ba8b30d4e39046056e131b8eeb4d3bc7b11897b59b800d2d5162acc1629102fdc00b5df1df1ae7497c0cb6bbb0a40fa983c20733210ac01b76f6eaa848ee  qcom_rmtfs.initd"

modem/qcom_rmtfs/point-storage-to-paths-in-etc.patch

@@ -0,0 +1,33 @@
+From c8af1ceccfa1c69845a0afb0068917cb16a4ef5b Mon Sep 17 00:00:00 2001
+From: Joey Hewitt <joey@joeyhewitt.com>
+Date: Sat, 10 Mar 2018 17:38:00 -0700
+Subject: [PATCH] point storage to paths in /etc
+
+Device packages will put symlinks there pointing to their storage
+partitions.
+---
+ storage.c | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/storage.c b/storage.c
+index 997b428..8754b98 100644
+--- a/storage.c
++++ b/storage.c
+@@ -23,10 +23,10 @@ struct caller {
+ };
+ 
+ static const struct partition partition_table[] = {
+-	{ "/boot/modem_fs1", "/boot/modem_fs1" },
+-	{ "/boot/modem_fs2", "/boot/modem_fs2" },
+-	{ "/boot/modem_fsc", "/boot/modem_fsc" },
+-	{ "/boot/modem_fsg", "/boot/modem_fsg" },
++	{ "/boot/modem_fs1", "/etc/qcom_rmtfs/partition-symlinks/modem_fs1" },
++	{ "/boot/modem_fs2", "/etc/qcom_rmtfs/partition-symlinks/modem_fs2" },
++	{ "/boot/modem_fsc", "/etc/qcom_rmtfs/partition-symlinks/modem_fsc" },
++	{ "/boot/modem_fsg", "/etc/qcom_rmtfs/partition-symlinks/modem_fsg" },
+ 	{}
+ };
+ 
+-- 
+2.7.4
+

modem/qcom_rmtfs/qcom_rmtfs.initd

@@ -0,0 +1,10 @@
+#!/sbin/openrc-run
+
+# libqipcrtr4msmipc.so may not be present, on devices that don't need it
+export LD_PRELOAD=/usr/lib/preload/libqipcrtr4msmipc.so
+
+command="/bin/sh"
+command_args="-c 'exec /usr/sbin/qcom_rmtfs 2>&1 | logger -t qcom_rmtfs'"
+command_background="yes"
+
+pidfile="/var/run/${SVCNAME}.pid"

modem/qcom_rmtfs/qcom_rmtfs.post-install

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+rc-update -q add qcom_rmtfs boot

modem/qcom_rmtfs/support-uio.patch

@@ -0,0 +1,186 @@
+From b98442bbfaa0b61963c23c6079055c94515e38dd Mon Sep 17 00:00:00 2001
+From: Joey Hewitt <joey@joeyhewitt.com>
+Date: Mon, 9 Oct 2017 21:41:43 -0700
+Subject: [PATCH] add uio dev support
+
+diff --git a/sharedmem.c b/sharedmem.c
+index f788b8a..eead258 100644
+--- a/sharedmem.c
++++ b/sharedmem.c
+@@ -44,6 +44,37 @@ static int parse_hex_sysattr(struct udev_device *dev, const char *name,
+ 	return 0;
+ }
+ 
++static int parse_hex_sysfsfile(int dir_fd, const char *name,
++			     unsigned long *value)
++{
++	unsigned long val;
++	char buf[32];
++	char *endptr;
++	int fd;
++
++	fd = openat(dir_fd, name, O_RDONLY);
++	if (fd < 0) {
++		return -errno;
++	}
++
++	if (read(fd, buf, sizeof(buf)) < 0) {
++		close(fd);
++		return -errno;
++	}
++
++	close(fd);
++
++	errno = 0;
++	val = strtoul(buf, &endptr, 16);
++	if ((val == LONG_MAX && errno == ERANGE) || endptr == buf) {
++		return -errno;
++	}
++
++	*value = val;
++
++	return 0;
++}
++
+ static int rmtfs_mem_open_rfsa(struct rmtfs_mem *rmem, int client_id)
+ {
+ 	struct udev_device *dev;
+@@ -114,6 +145,88 @@ err_close_fd:
+ 	return -saved_errno;
+ }
+ 
++static int rmtfs_mem_open_uio(struct rmtfs_mem *rmem)
++{
++	int saved_errno;
++	char path[64];
++	char buf[32];
++	int ret;
++	int dir_fd;
++	int fd;
++
++	for (int uio_index = 0; uio_index < 8; uio_index++) {
++		snprintf(path, sizeof(path), "/sys/class/uio/uio%d", uio_index);
++		dir_fd = open(path, O_DIRECTORY);
++		if (dir_fd < 0) {
++			saved_errno = errno;
++			if (errno != ENOENT) {
++				fprintf(stderr, "failed to open %s: %s\n", path, strerror(errno));
++			}
++			goto ret;
++		}
++
++		fd = openat(dir_fd, "name", O_RDONLY);
++		if (fd < 0) {
++			saved_errno = errno;
++			fprintf(stderr, "failed to open %s/name: %s\n", path, strerror(errno));
++			goto close_dirfd;
++		}
++
++		if (read(fd, buf, sizeof(buf)) < 0) {
++			saved_errno = errno;
++			fprintf(stderr, "failed to read %s/name: %s\n", path, strerror(errno));
++			close(fd);
++			goto close_dirfd;
++		}
++
++		close(fd);
++
++		if (strncmp(buf, "rmtfs\n", 6)) {
++			continue;
++		}
++
++		ret = parse_hex_sysfsfile(dir_fd, "maps/map0/addr", &rmem->address);
++		if (ret < 0) {
++			fprintf(stderr, "failed to parse addr of %s\n", path);
++			saved_errno = -ret;
++			goto close_dirfd;
++		}
++
++		ret = parse_hex_sysfsfile(dir_fd, "maps/map0/size", &rmem->size);
++		if (ret < 0) {
++			fprintf(stderr, "failed to parse size of %s\n", path);
++			saved_errno = -ret;
++			goto close_dirfd;
++		}
++
++		snprintf(path, sizeof(path), "/dev/uio%d", uio_index);
++		rmem->fd = open(path, O_RDWR);
++		if (rmem->fd < 0) {
++			saved_errno = errno;
++			fprintf(stderr, "failed to open %s: %s\n", path, strerror(errno));
++			goto close_dirfd;
++		}
++
++		rmem->base = mmap(0, rmem->size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
++		if (rmem->base == MAP_FAILED) {
++			saved_errno = errno;
++			fprintf(stderr, "failed to mmap: %s\n", strerror(errno));
++			close(rmem->fd);
++			goto close_dirfd;
++		}
++
++		saved_errno = 0;
++		goto close_dirfd;
++	}
++
++	saved_errno = ENOENT;
++
++close_dirfd:
++	close(dir_fd);
++ret:
++	return -saved_errno;
++}
++
+ struct rmtfs_mem *rmtfs_mem_open(void)
+ {
+ 	struct rmtfs_mem *rmem;
+@@ -131,26 +244,31 @@ struct rmtfs_mem *rmtfs_mem_open(void)
+ 	if (ret < 0 && ret != -ENOENT) {
+ 		goto err;
+ 	} else if (ret < 0) {
+-		fprintf(stderr, "falling back to /dev/mem access\n");
+-
+-		ret = rmtfs_mem_enumerate(rmem);
+-		if (ret < 0)
+-			goto err;
+-
+-		fd = open("/dev/mem", O_RDWR|O_SYNC);
+-		if (fd < 0) {
+-			fprintf(stderr, "failed to open /dev/mem\n");
++		ret = rmtfs_mem_open_uio(rmem);
++		if (ret < 0 && ret != -ENOENT) {
+ 			goto err;
++		} else if (ret < 0) {
++			fprintf(stderr, "falling back to /dev/mem access\n");
++
++			ret = rmtfs_mem_enumerate(rmem);
++			if (ret < 0)
++				goto err;
++
++			fd = open("/dev/mem", O_RDWR|O_SYNC);
++			if (fd < 0) {
++				fprintf(stderr, "failed to open /dev/mem\n");
++				goto err;
++			}
++
++			base = mmap(0, rmem->size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, rmem->address);
++			if (base == MAP_FAILED) {
++				fprintf(stderr, "failed to mmap: %s\n", strerror(errno));
++				goto err_close_fd;
++			}
++
++			rmem->base = base;
++			rmem->fd = fd;
+ 		}
+-
+-		base = mmap(0, rmem->size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, rmem->address);
+-		if (base == MAP_FAILED) {
+-			fprintf(stderr, "failed to mmap: %s\n", strerror(errno));
+-			goto err_close_fd;
+-		}
+-
+-		rmem->base = base;
+-		rmem->fd = fd;
+ 	}
+ 
+ 	return rmem;

modem/qrtr/APKBUILD

@@ -0,0 +1,30 @@
+pkgname=qrtr
+pkgver=1.0_git20180131
+pkgrel=0
+pkgdesc="Userspace reference for net/qrtr in the Linux kernel"
+url="https://github.com/andersson/qrtr"
+arch="all"
+license="BSD-3-Clause"
+makedepends="msmipc-dev"
+subpackages="$pkgname-doc $pkgname-dev"
+_commit="dbffdd0193996723fdc9456e09736a30a32daf25"
+source="
+	qrtr.tgz::https://github.com/andersson/qrtr/archive/"$_commit".tar.gz
+	fix-cfg-include.patch
+	"
+builddir="$srcdir""/qrtr-"$_commit
+options="!check"
+
+build() {
+	cd "$builddir"
+	make C_INCLUDE_PATH=/usr/src/msmipc-dev/include libqrtr.so
+}
+
+package() {
+	cd "$builddir"
+	make DESTDIR="$pkgdir" prefix=/usr "$pkgdir"/usr/lib/libqrtr.so.1.0 "$pkgdir"/usr/include/libqrtr.h
+	install -Dm644 LICENSE "$pkgdir"/usr/share/licenses/$pkgname/COPYING
+}
+
+sha512sums="4fbf9bcb26794a54e9784bafd0ee46a0c628327d6b31a438ca6d907185260cf590fc90a2e22139ebf3b939750277f434d67096396192d1ee3b0542c2feb39075  qrtr.tgz
+fca4a8b886b7bb6a53a83f3a69e3ae03b8fc462f6f6bf6c812af1a1036aa5a8c1f40b6cabf921e91c55423c37309d4e56ac8ccf0d4c5f7db41c1005afaf19382  fix-cfg-include.patch"

modem/qrtr/fix-cfg-include.patch

@@ -0,0 +1,13 @@
+diff --git a/Makefile b/Makefile
+index 2fa026f..200fb92 100644
+--- a/Makefile
++++ b/Makefile
+@@ -28,6 +28,8 @@ $(proj)-ns-srcs := \
+ 
+ $(proj)-ns-cflags := -Ilib
+ 
++$(proj)-cfg-cflags := -Ilib
++
+ $(proj)-lookup-srcs := \
+ 	src/lookup.c \
+ 	src/util.c \