Add digimend-debug tool

Fixes #285

Author: spbnick

Makefile

@@ -12,6 +12,7 @@ DEPMOD_CONF = $(DESTDIR)/etc/depmod.d/digimend.conf
 DRACUT_CONF_DIR = $(DESTDIR)/usr/lib/dracut/dracut.conf.d
 DRACUT_CONF = $(DRACUT_CONF_DIR)/90-digimend.conf
 HID_REBIND = $(DESTDIR)/lib/udev/hid-rebind
+DIGIMEND_DEBUG = $(DESTDIR)/usr/sbin/digimend-debug
 XORG_CONF := $(DESTDIR)/usr/share/X11/xorg.conf.d/50-digimend.conf
 PACKAGE_NAME = digimend-kernel-drivers
 PACKAGE_VERSION = 10
@@ -51,6 +52,12 @@ xorg_conf_install:
 xorg_conf_uninstall:
 	rm -vf $(XORG_CONF)
 
+tools_install:
+	install -D -m 0755 digimend-debug $(DIGIMEND_DEBUG)
+
+tools_uninstall:
+	rm -vf $(DIGIMEND_DEBUG)
+
 udev_rules_install_files:
 	install -D -m 0755 hid-rebind $(HID_REBIND)
 	install -D -m 0644 udev.rules $(UDEV_RULES)
@@ -70,9 +77,9 @@ modules_uninstall:
 	       /lib/modules/*/extra/hid-uclogic.ko \
 	       /lib/modules/*/extra/hid-viewsonic.ko
 
-install: modules modules_install depmod_conf_install dracut_conf_install udev_rules_install xorg_conf_install
+install: modules modules_install depmod_conf_install dracut_conf_install udev_rules_install xorg_conf_install tools_install
 
-uninstall: xorg_conf_uninstall udev_rules_uninstall dracut_conf_uninstall depmod_conf_uninstall modules_uninstall
+uninstall: tools_uninstall xorg_conf_uninstall udev_rules_uninstall dracut_conf_uninstall depmod_conf_uninstall modules_uninstall
 
 dkms_check:
 	@if ! which dkms >/dev/null; then \
@@ -117,9 +124,9 @@ dkms_modules_uninstall: dkms_check
 	        } \
 	    done
 
-dkms_install: dkms_modules_install depmod_conf_install dracut_conf_install udev_rules_install xorg_conf_install
+dkms_install: dkms_modules_install depmod_conf_install dracut_conf_install udev_rules_install xorg_conf_install tools_install
 
-dkms_uninstall: xorg_conf_uninstall udev_rules_uninstall dracut_conf_uninstall depmod_conf_uninstall dkms_modules_uninstall
+dkms_uninstall: tools_uninstall xorg_conf_uninstall udev_rules_uninstall dracut_conf_uninstall depmod_conf_uninstall dkms_modules_uninstall
 
 dist:
 	git archive --format=tar.gz --prefix=$(PACKAGE)/ HEAD > $(PACKAGE).tar.gz

debian/rules

@@ -31,7 +31,7 @@ override_dh_auto_build:
 override_dh_auto_test:
 
 override_dh_auto_install:
-	$(MAKE) DESTDIR=$(CURDIR)/debian/digimend-dkms dkms_source_install udev_rules_install_files xorg_conf_install
+	$(MAKE) DESTDIR=$(CURDIR)/debian/digimend-dkms dkms_source_install udev_rules_install_files xorg_conf_install tools_install
 
 override_dh_dkms:
 	dh_dkms -p digimend-dkms -V -- dkms.conf

digimend-debug

@@ -0,0 +1,73 @@
+#!/bin/bash
+#
+# Enable/disable debug code in DIGImend kernel drivers.
+# Author: Nikolai Kondrashov <spbnick@gmail.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+set -e -u -o pipefail
+
+function usage() {
+	local progname=`basename "$0"`
+	echo "Usage: $progname STATUS"
+	echo "Enable/disable debug code in DIGImend kernel drivers,"
+	echo "making sure affected modules are loaded."
+	echo ""
+	echo "Arguments:"
+	echo "	STATUS	1/on/enable to enable, 0/off/disable to disable"
+	echo ""
+}
+
+declare -r CONTROL_FILE="/sys/kernel/debug/dynamic_debug/control"
+declare -r -a MODULE_LIST=("hid_uclogic")
+
+if [ "$#" != 1 ]; then
+	echo "Invalid number of arguments" >&2
+	echo "" >&2
+	usage >&2
+	exit 1
+fi
+
+case "${1,,}" in
+	0|off|disable)
+		op="-"
+		;;
+	1|on|enable)
+		op="+"
+		;;
+	*)
+		echo "Unknown status: $1" >&2
+		echo "" >&2
+		usage >&2
+		exit 1
+		;;
+esac
+
+# Make sure modules are loaded, otherwise enabling will have no effect
+if ! modprobe -a "${MODULE_LIST[@]}"; then
+	echo "Failed loading DIGImend modules." >&2
+	echo "Make sure they're installed, and you're root or using sudo." >&2
+	exit 1
+fi
+
+if ! [ -r "$CONTROL_FILE" -a -w "$CONTROL_FILE" ]; then
+	echo "Cannot access control file." >&2
+	echo "Make sure you're root or using sudo." >&2
+	exit 1
+fi
+
+for MODULE in "${MODULE_LIST[@]}"; do
+	echo "module ${MODULE} ${op}pmfl" > "$CONTROL_FILE"
+done