From 0bf158ef1f37693e7eb5df8ee1f77b6bc360c177 Mon Sep 17 00:00:00 2001
From: Robert Kaussow <mail@geeklabor.de>
Date: Sat, 4 May 2019 17:47:38 +0200
Subject: [PATCH] add task to exclude serial devices from ModemManager

---
 defaults/main.yml                                 | 7 +++++++
 tasks/install.yml                                 | 6 ++++++
 templates/etc/udev/rules.d/99-mm-disable.rules.j2 | 5 +++++
 3 files changed, 18 insertions(+)
 create mode 100644 templates/etc/udev/rules.d/99-mm-disable.rules.j2

diff --git a/defaults/main.yml b/defaults/main.yml
index 07f9e10..d6c91c0 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -38,6 +38,13 @@ homeassistant_open_ports:
 # be careful! wrong config can make your system unusable!
 # homeassistant_cmdline_content: "console=tty1 root=/dev/mmcblk0p3 rootfstype=ext4 elevator=deadline rootwait"
 
+# to prevent ModemManger from binding serial devices like CC2531
+# devices can be skipped by an udev rule
+homeassistant_exclude_modemmanager: False
+homeassistant_serial_device:
+  - vendor_id: "0000"
+    product_id: "xxxx"
+
 homeassistant_nginx_vhost_enabled: False
 homeassistant_nginx_server: localhost
 homeassistant_nginx_vhost_dir: /etc/nginx/sites-available
diff --git a/tasks/install.yml b/tasks/install.yml
index 77af2f1..ebbc3c4 100644
--- a/tasks/install.yml
+++ b/tasks/install.yml
@@ -41,6 +41,12 @@
         dest: /boot/cmdline.txt
       when: homeassistant_cmdline_content is defined
 
+    - name: Exclude serial devices from ModemManager
+      template:
+        src: "etc/udev/rules.d/99-mm-disable.rules.j2"
+        dest: "/etc/udev/rules.d/99-mm-disable.rules"
+      when: homeassistant_exclude_modemmanager
+
     - name: Copy systemd unit file
       template:
         src: "etc/systemd/system/homeassistant.service.j2"
diff --git a/templates/etc/udev/rules.d/99-mm-disable.rules.j2 b/templates/etc/udev/rules.d/99-mm-disable.rules.j2
new file mode 100644
index 0000000..785ac5e
--- /dev/null
+++ b/templates/etc/udev/rules.d/99-mm-disable.rules.j2
@@ -0,0 +1,5 @@
+#jinja2: lstrip_blocks: True
+# {{ ansible_managed }}
+{% for item in homeassistant_serial_device %}
+ATTRS{idVendor}=="{{ item.vendor_id }}" ATTRS{idProduct}=="{{ item.product_id }}", ENV{ID_MM_DEVICE_IGNORE}="1"
+{% endfor %}