hwdb: Allow end-users root-less access to USB analyzers

Procotol analyzers are external devices used to capture traffic over a
wire so that it could be analysed. End-users at the console should be
able to access those devices without requiring root access.

This change obsoletes the need to install Total Phase's "Linux drivers",
which are really just udev rules and hotplug usermap files to do that:
https://www.totalphase.com/products/usb-drivers-linux/

hwdb.d/70-analyzers.hwdb

@@ -0,0 +1,31 @@
+# This file is part of systemd.
+#
+# Database for protocol analyzers that should be accessible to the seat owner
+#
+# Permitted keys:
+#   Specify if a device is a protocol analyzer
+#   ID_PROTOCOL_ANALYZER=1|0
+
+###########################################################
+# Total Phase
+###########################################################
+# Aarvark I2C/SPI Host Adapter
+usb_device:v0403pe0d0*
+ ID_PROTOCOL_ANALYZER=1
+
+# Beagle Protocol Analyzers
+usb_device:v1679p2001*
+ ID_PROTOCOL_ANALYZER=1
+
+# Cheetah SPI Host Adapter
+usb_device:v1679p2002*
+ ID_PROTOCOL_ANALYZER=1
+
+# Komodo CAN Duo Interface
+usb_device:v1679p3001*
+ ID_PROTOCOL_ANALYZER=1
+
+# Power Delivery Analyzers
+usb_device:v1679p6003*
+usb_device:v0483pdf11*
+ ID_PROTOCOL_ANALYZER=1

hwdb.d/meson.build

@@ -27,6 +27,7 @@ hwdb_files_test = files('''
         60-keyboard.hwdb
         60-seat.hwdb
         60-sensor.hwdb
+        70-analyzers.hwdb
         70-joystick.hwdb
         70-mouse.hwdb
         70-pointingstick.hwdb

hwdb.d/parse_hwdb.py

@@ -80,6 +80,7 @@ TYPES = {'mouse':    ('usb', 'bluetooth', 'ps2', '*'),
 GENERAL_MATCHES = {'acpi',
                    'bluetooth',
                    'usb',
+                   'usb_device',
                    'pci',
                    'sdio',
                    'vmbus',
@@ -147,6 +148,7 @@ def property_grammar():
              ('ID_INPUT_TOUCHPAD', Or((Literal('0'), Literal('1')))),
              ('ID_INPUT_TOUCHSCREEN', Or((Literal('0'), Literal('1')))),
              ('ID_INPUT_TRACKBALL', Or((Literal('0'), Literal('1')))),
+             ('ID_PROTOCOL_ANALYZER', Or((Literal('0'), Literal('1')))),
              ('POINTINGSTICK_SENSITIVITY', INTEGER),
              ('POINTINGSTICK_CONST_ACCEL', REAL),
              ('ID_INPUT_JOYSTICK_INTEGRATION', Or(('internal', 'external'))),
@@ -206,9 +208,10 @@ def check_matches(groups):
     matches = sum((group[0] for group in groups), [])
 
     # This is a partial check. The other cases could be also done, but those
-    # two are most commonly wrong.
-    grammars = { 'usb' : 'v' + upperhex_word(4) + Optional('p' + upperhex_word(4)),
-                 'pci' : 'v' + upperhex_word(8) + Optional('d' + upperhex_word(8)),
+    # three are most commonly wrong.
+    grammars = { 'usb'        : 'v' + upperhex_word(4) + Optional('p' + upperhex_word(4)),
+                 'usb_device' : 'v' + upperhex_word(4) + Optional('p' + upperhex_word(4)),
+                 'pci'        : 'v' + upperhex_word(8) + Optional('d' + upperhex_word(8)),
     }
 
     for match in matches:

rules.d/50-udev-default.rules.in

@@ -12,6 +12,7 @@ SUBSYSTEM=="rtc", KERNEL=="rtc0", SYMLINK+="rtc", OPTIONS+="link_priority=-100"
 
 SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", IMPORT{builtin}="usb_id", IMPORT{builtin}="hwdb --subsystem=usb"
 ENV{MODALIAS}!="", IMPORT{builtin}="hwdb --subsystem=$env{SUBSYSTEM}"
+SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", IMPORT{builtin}="hwdb 'usb_device:v$attr{idVendor}p$attr{idProduct}:name:$attr{product}:'"
 
 ACTION!="add", GOTO="default_end"
 

src/login/70-uaccess.rules.in

@@ -80,4 +80,7 @@ ENV{ID_SOFTWARE_RADIO}=="?*", TAG+="uaccess"
 # 3D printers, CNC machines, laser cutters, 3D scanners, etc.
 ENV{ID_MAKER_TOOL}=="?*", TAG+="uaccess"
 
+# Protocol analyzers
+ENV{ID_PROTOCOL_ANALYZER}=="?*", TAG+="uaccess"
+
 LABEL="uaccess_end"