data,fcc-unlock: add example unlock scripts

Added scripts for Foxconn SDX55, Quectel EM120, and several old Sierra
Wireless manufactured devices:
 * Installed but not used by default, the user needs to setup manual
   links from ${pkgdatadir}/fcc-unlock.available.d, to
   ${pkgsysconfdir}/fcc-unlock.d in order to enable them.
 * Installed with rights only for the owner, so that the dispatcher in
   ModemManager can validate them.
 * They rely on $PATH to find the qmicli/mbimcli tools.

In addition to these scripts, per-vid:pid links are created in the
same ${pkgdatadir}/fcc-unlock.available.d directory, specifying which
are the specific devices that require the FCC unlock operation.

This patch also creates the ${pkgsysconfdir}/fcc-unlock.d and
${pkglibdir}/fcc-unlock.d directories where ModemManager looks for the
enabled tools.

Note that the meson setup doesn't support creating/deleting links
officially yet, so we use a workaround using meson.add_install_script
that is not perfect (i.e. doesn't handle the symlink removal during
uninstall). See https://github.com/mesonbuild/meson/issues/1602

6 files changed, 175 insertions, 1 deletions

diff --git a/data/Makefile.am b/data/Makefile.am
index 447cb3d0..b42b70f8 100644
--- a/data/Makefile.am
+++ b/data/Makefile.am
@@ -1,5 +1,5 @@
 
-SUBDIRS = . tests
+SUBDIRS = . fcc-unlock tests
 
 edit = @sed \
        -e 's|@sbindir[@]|$(sbindir)|g' \
diff --git a/data/fcc-unlock/105b b/data/fcc-unlock/105b
new file mode 100644
index 00000000..21fe5329
--- /dev/null
+++ b/data/fcc-unlock/105b
@@ -0,0 +1,34 @@
+#!/bin/bash
+
+# SPDX-License-Identifier: CC0-1.0
+# 2021 Aleksander Morgado <aleksander@aleksander.es>
+#
+# Foxconn SDX55 FCC unlock operation
+#
+
+# require program name and at least 2 arguments
+[ $# -lt 2 ] && exit 1
+
+# first argument is DBus path, not needed here
+shift
+
+# second and next arguments are control port names
+for PORT in "$@"; do
+  # match port type in Linux 5.14 and newer
+  grep -q MBIM /sys/class/wwan/${PORT}/type 2>/dev/null && {
+    MBIM_PORT=$PORT
+    break
+  }
+  # match port name in Linux 5.13
+  [[ $PORT == *"MBIM"* ]] && {
+    MBIM_PORT=$PORT
+    break
+  }
+done
+
+# fail if no MBIM port exposed
+[ -n "${MBIM_PORT}" ] || exit 2
+
+# run qmicli operation over MBIM
+qmicli --device-open-proxy --device=/dev/${MBIM_PORT} --dms-foxconn-set-fcc-authentication=0
+exit $?
diff --git a/data/fcc-unlock/1199 b/data/fcc-unlock/1199
new file mode 100644
index 00000000..0109c6ab
--- /dev/null
+++ b/data/fcc-unlock/1199
@@ -0,0 +1,33 @@
+#!/bin/bash
+
+# SPDX-License-Identifier: CC0-1.0
+# 2021 Aleksander Morgado <aleksander@aleksander.es>
+#
+# Sierra Wireless FCC unlock mechanism
+#  HP 820 G1 (EM7355),    03f0:4e1d
+#  Dell DW5570 (MC8805),  413c:81a3
+#  Dell DW5808 (MC7355),  413c:81a8
+#  Lenovo-shipped EM7455, 1199:9079
+#
+
+# require program name and at least 2 arguments
+[ $# -lt 2 ] && exit 1
+
+# first argument is DBus path, not needed here
+shift
+
+# second and next arguments are control port names
+for PORT in "$@"; do
+  # match port name
+  [[ $PORT == *"cdc-wdm"* ]] && {
+    CDC_WDM_PORT=$PORT
+    break
+  }
+done
+
+# fail if no cdc-wdm port exposed
+[ -n "${CDC_WDM_PORT}" ] || exit 2
+
+# run qmicli operation
+qmicli --device-open-proxy --device=/dev/${CDC_WDM_PORT} --dms-set-fcc-authentication
+exit $?
diff --git a/data/fcc-unlock/1eac b/data/fcc-unlock/1eac
new file mode 100644
index 00000000..1068d9c2
--- /dev/null
+++ b/data/fcc-unlock/1eac
@@ -0,0 +1,34 @@
+#!/bin/bash
+
+# SPDX-License-Identifier: CC0-1.0
+# 2021 Aleksander Morgado <aleksander@aleksander.es>
+#
+# Quectel EM120 FCC unlock operation
+#
+
+# require program name and at least 2 arguments
+[ $# -lt 2 ] && exit 1
+
+# first argument is DBus path, not needed here
+shift
+
+# second and next arguments are control port names
+for PORT in "$@"; do
+  # match port type in Linux 5.14 and newer
+  grep -q MBIM /sys/class/wwan/${PORT}/type 2>/dev/null && {
+    MBIM_PORT=$PORT
+    break
+  }
+  # match port name in Linux 5.13
+  [[ $PORT == *"MBIM"* ]] && {
+    MBIM_PORT=$PORT
+    break
+  }
+done
+
+# fail if no MBIM port exposed
+[ -n "${MBIM_PORT}" ] || exit 2
+
+# run mbimcli operation
+mbimcli --device-open-proxy --device=/dev/${MBIM_PORT} --quectel-set-radio-state=on
+exit $?
diff --git a/data/fcc-unlock/Makefile.am b/data/fcc-unlock/Makefile.am
new file mode 100644
index 00000000..a98a68fa
--- /dev/null
+++ b/data/fcc-unlock/Makefile.am
@@ -0,0 +1,32 @@
+
+# Directory for user-enabled tools
+fccunlockuser = $(pkgsysconfdir)/fcc-unlock.d
+
+# Directory for package-enabled tools
+fccunlockpackage = $(pkglibdir)/fcc-unlock.d
+
+# Shipped but disabled FCC unlock tools
+fccunlockavailabledir = $(pkgdatadir)/fcc-unlock.available.d
+fccunlockavailable_SCRIPTS = \
+	105b \
+	1199 \
+	1eac \
+	$(NULL)
+
+EXTRA_DIST = $(fccunlockavailable_SCRIPTS)
+
+install-data-hook:
+	$(MKDIR_P) $(DESTDIR)$(fccunlockuser); \
+	$(MKDIR_P) $(DESTDIR)$(fccunlockpackage); \
+	cd $(DESTDIR)$(fccunlockavailabledir); \
+	chmod go-rwx *; \
+	$(LN_S) -f 105b 105b:e0ab; \
+	$(LN_S) -f 1199 03f0:4e1d; \
+	$(LN_S) -f 1199 1199:9079; \
+	$(LN_S) -f 1199 413c:81a3; \
+	$(LN_S) -f 1199 413c:81a8; \
+	$(LN_S) -f 1eac 1eac:1001; \
+	$(NULL)
+
+uninstall-hook:
+	cd $(DESTDIR)$(fccunlockavailabledir) && rm -f *:*
diff --git a/data/fcc-unlock/meson.build b/data/fcc-unlock/meson.build
new file mode 100644
index 00000000..f945fbf8
--- /dev/null
+++ b/data/fcc-unlock/meson.build
@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (C) 2021 Aleksander Morgado <aleksander@aleksander.es>
+
+# Shipped but disabled FCC unlock tools
+mm_fccunlockdiravailable = mm_pkgdatadir / 'fcc-unlock.available.d'
+
+# Directory for user-enabled tools
+mm_fccunlockdiruser = mm_pkgsysconfdir / 'fcc-unlock.d'
+
+# Directory for package-enabled tools
+mm_fccunlockdirpackage = mm_pkglibdir / 'fcc-unlock.d'
+
+examples = files(
+  '105b',
+  '1199',
+  '1eac',
+)
+
+install_data(
+  examples,
+  install_mode: 'rwx------',
+  install_dir: mm_fccunlockdiravailable,
+)
+
+vidpids = {
+  '105b:e0ab': '105b',
+  '03f0:4e1d': '1199',
+  '1199:9079': '1199',
+  '413c:81a3': '1199',
+  '413c:81a8': '1199',
+  '1eac:1001': '1eac',
+}
+
+ln_cmd = 'ln -fs @0@ ${DESTDIR}@1@'
+foreach output, input: vidpids
+  meson.add_install_script('sh', '-c', ln_cmd.format(input, mm_prefix / mm_fccunlockdiravailable / output))
+endforeach
+
+mkdir_cmd = 'mkdir -p ${DESTDIR}@0@'
+meson.add_install_script('sh', '-c', mkdir_cmd.format(mm_prefix / mm_fccunlockdiruser))
+meson.add_install_script('sh', '-c', mkdir_cmd.format(mm_prefix / mm_fccunlockdirpackage))