Switch to a native package

See merge request !1

Add the "debian" directory used to build .deb packages.

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

Get the board data values from the config file and use the port number
from there to pass to servod.main() as it is now required as per
hdctools R80 (release-R80-12739.B).

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

Use the new servo_parsing.ServodRCParser.ParseRC() static class method
from hdctools as per the R80 release (release-R80-12739.B).

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

Update run-servod to use with hdctools from version stabilize-11839.B.
Some modules have been consolidated and renames, and the main function
can now accept arbitrary arguments rather than sys.argv (yay!).

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

Fix do_cleanup() to not abort if it fails to delete a directory or
stop a service process, but print a warning instead.

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

With the option to leave some consoles as their original /dev/ttyUSB*
device and not convert them to a /dev/pty/* device, they may not all
be always available.  Only create symlinks for consoles set up as pty.

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

Rename README as README.md and format it with Markdown.  Also update
it with instructions to get this to work with the latest Servo Micro
board which is needed for more recent devices such as gru-kevin.

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

There is a new type of board called the Servo Micro with a different
USB device ID.  It can be used in the same way as the classic Servo v2
boards, so this just adds a udev rule to match it and run servod.

The gru-kevin Chromebook uses Servo Micro so add a sample
configuration line for a kevin device.

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

Use the StopWhenUnneeded=yes property to automatically kill the
service processes when the board is unplugged (and the USB device goes
goes away as reported by udev).

Thanks to: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

The regular way for systemd to stop a service when it's not needed any
more (i.e. servo board unplugged in this case) to send SIGTERM to the
service process.  If the returned value is non-zero then the service
stays listed as "failed" in the systemd status.  Return zero when
catching SIGTERM.

If SIGTERM is not handled then systemd will send SIGKILL later on...

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

When the servo board gets attached, several USB device entries are
created in sysfs.  Rather than matching these, which cause the systemd
service to be spawned multiple times, match the parent USB device
entry by filtering with the MAJOR environment variable.  Also use the
raw device path in /dev rather than the sysfs path to find the udev
device.

This means the systemd service instance name has a more unique and
descriptive name, only one service gets started for each servo board
connected and there's no need to search for parent udev devices in
run-servod any more.

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

Update README file now that the kernel driver has been removed, and
explain the issue with hdctools.

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

Remove source code for the google-servo kernel driver as it's not
needed any more with the new udev and systemd services.

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

In order to remove the need for a kernel driver which is only there to
set up /dev/usb/google-servo* devices, take the sysfs device path as
provided by udev.  So look up the udev device based on their sysfs
udev path rather than the device node.

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

Use the udev device name as the systemd service instance name, and use
it to create the full device path which can then be used to find the
udev device.  Also make the udev rule match the USB vendor/device IDs
and drop all dependencies on the google-servo kernel driver.

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

* convert tabs to 4 spaces
* fix code formatting and some coding style

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

This is a quick refresh of the code to make it more maintainable
and closer to Python 3.

* update copyright notice
* use print function
* use shutil.rmtree to simplify code
* use os.path.join to make paths
* make global variables UPPER case
* "don't repeat yourself" in some places

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

Make it work with pyudev 0.21.0 as per Debian Stretch.  Previous
version worked with 0.16.1 as per Jessie.

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

Handle the child exiting gracefully, and make sure restarts work. Exit
the main process when the child goes down. Clean the code up and
refactor into subroutines.

Signed-off-by: Daniel Stone <daniels@collabora.com>

Add roughly-working servo code. udev integration is still a little
hairy, and the Python is still very ugly, but it works.

Signed-off-by: Daniel Stone <daniels@collabora.com>