plugin: let plugins decide if they want echo removal during AT probing

This is the port to git master of the following patch:

commit 21e66dfa1774ac2ee037ac8b6e8bb4d71a6f7931
Author: Dan Williams <dcbw@redhat.com>
Date:   Thu Aug 23 21:13:35 2012 -0500

    core: add function to open probe ports without removing echo

    Some devices (Sierra GSM ones) return stuff we need but don't
    bother to prefix it with <CR><LF>, so we need to optionally turn
    off the echo removal at probe time.

1 files changed, 19 insertions, 0 deletions

diff --git a/src/mm-plugin.c b/src/mm-plugin.c
index a1a1c33f..a8009976 100644
--- a/src/mm-plugin.c
+++ b/src/mm-plugin.c
@@ -69,6 +69,7 @@ struct _MMPluginPrivate {
     MMPortProbeAtCommand *custom_at_probe;
     MMAsyncMethod *custom_init;
     guint64 send_delay;
+    gboolean remove_echo;
 };
 
 enum {
@@ -93,6 +94,7 @@ enum {
     PROP_CUSTOM_AT_PROBE,
     PROP_CUSTOM_INIT,
     PROP_SEND_DELAY,
+    PROP_REMOVE_ECHO,
     LAST_PROP
 };
 
@@ -658,6 +660,7 @@ mm_plugin_supports_port (MMPlugin *self,
     mm_port_probe_run (probe,
                        ctx->flags,
                        self->priv->send_delay,
+                       self->priv->remove_echo,
                        self->priv->custom_at_probe,
                        self->priv->custom_init,
                        (GAsyncReadyCallback)port_probe_run_ready,
@@ -737,6 +740,7 @@ mm_plugin_init (MMPlugin *self)
 
     /* Defaults */
     self->priv->send_delay = 100000;
+    self->priv->remove_echo = TRUE;
 }
 
 static void
@@ -828,6 +832,10 @@ set_property (GObject *object,
         /* Construct only */
         self->priv->send_delay = (guint64)g_value_get_uint64 (value);
         break;
+    case PROP_REMOVE_ECHO:
+        /* Construct only */
+        self->priv->remove_echo = g_value_get_boolean (value);
+        break;
     default:
         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
@@ -903,6 +911,9 @@ get_property (GObject *object,
     case PROP_SEND_DELAY:
         g_value_set_uint64 (value, self->priv->send_delay);
         break;
+    case PROP_REMOVE_ECHO:
+        g_value_set_boolean (value, self->priv->remove_echo);
+        break;
     default:
         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
@@ -1104,4 +1115,12 @@ mm_plugin_class_init (MMPluginClass *klass)
                               "in microseconds",
                               0, G_MAXUINT64, 100000,
                               G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
+
+    g_object_class_install_property
+        (object_class, PROP_REMOVE_ECHO,
+         g_param_spec_boolean (MM_PLUGIN_REMOVE_ECHO,
+                               "Remove echo",
+                               "Remove echo out of the AT responses",
+                               TRUE,
+                               G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
 }