at-serial-port: new properties to define and manage a set of init commands

We are now able to specify a list of AT commands to be run whenever the port is
opened for the first time (i.e. open_count from 0 to 1). These commands are
to be treated as a 'port initialization' sequence, where port-configuration
specific AT commands are defined (e.g. ATE0).

src/mm-at-serial-port.c

@@ -31,6 +31,8 @@ G_DEFINE_TYPE (MMAtSerialPort, mm_at_serial_port, MM_TYPE_SERIAL_PORT)
 enum {
     PROP_0,
     PROP_REMOVE_ECHO,
+    PROP_INIT_SEQUENCE_ENABLED,
+    PROP_INIT_SEQUENCE,
     LAST_PROP
 };
 
@@ -44,7 +46,10 @@ typedef struct {
 
     MMAtPortFlag flags;
 
+    /* Properties */
     gboolean remove_echo;
+    guint init_sequence_enabled;
+    gchar **init_sequence;
 } MMAtSerialPortPrivate;
 
 /*****************************************************************************/
@@ -417,6 +422,40 @@ mm_at_serial_port_get_flags (MMAtSerialPort *self)
 
 /*****************************************************************************/
 
+void
+mm_at_serial_port_run_init_sequence (MMAtSerialPort *self)
+{
+    MMAtSerialPortPrivate *priv = MM_AT_SERIAL_PORT_GET_PRIVATE (self);
+    guint i;
+
+    if (!priv->init_sequence)
+        return;
+
+    mm_dbg ("(%s): running init sequence...", mm_port_get_device (MM_PORT (self)));
+
+    /* Just queue the init commands, don't wait for reply */
+    for (i = 0; priv->init_sequence[i]; i++) {
+        mm_at_serial_port_queue_command (self,
+                                         priv->init_sequence[i],
+                                         3,
+                                         FALSE,
+                                         NULL,
+                                         NULL,
+                                         NULL);
+    }
+}
+
+static void
+config (MMSerialPort *self)
+{
+    MMAtSerialPortPrivate *priv = MM_AT_SERIAL_PORT_GET_PRIVATE (self);
+
+    if (priv->init_sequence_enabled)
+        mm_at_serial_port_run_init_sequence (MM_AT_SERIAL_PORT (self));
+}
+
+/*****************************************************************************/
+
 MMAtSerialPort *
 mm_at_serial_port_new (const char *name)
 {
@@ -434,6 +473,8 @@ mm_at_serial_port_init (MMAtSerialPort *self)
 
     /* By default, remove echo */
     priv->remove_echo = TRUE;
+    /* By default, run init sequence during first port opening */
+    priv->init_sequence_enabled = TRUE;
 }
 
 static void
@@ -446,6 +487,13 @@ set_property (GObject *object, guint prop_id,
     case PROP_REMOVE_ECHO:
         priv->remove_echo = g_value_get_boolean (value);
         break;
+    case PROP_INIT_SEQUENCE_ENABLED:
+        priv->init_sequence_enabled = g_value_get_boolean (value);
+        break;
+    case PROP_INIT_SEQUENCE:
+        g_strfreev (priv->init_sequence);
+        priv->init_sequence = g_value_dup_boxed (value);
+        break;
     default:
         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
@@ -462,6 +510,12 @@ get_property (GObject *object, guint prop_id,
     case PROP_REMOVE_ECHO:
         g_value_set_boolean (value, priv->remove_echo);
         break;
+    case PROP_INIT_SEQUENCE_ENABLED:
+        g_value_set_boolean (value, priv->init_sequence_enabled);
+        break;
+    case PROP_INIT_SEQUENCE:
+        g_value_set_boxed (value, priv->init_sequence);
+        break;
     default:
         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
@@ -509,6 +563,7 @@ mm_at_serial_port_class_init (MMAtSerialPortClass *klass)
     port_class->parse_response = parse_response;
     port_class->handle_response = handle_response;
     port_class->debug_log = debug_log;
+    port_class->config = config;
 
     g_object_class_install_property
         (object_class, PROP_REMOVE_ECHO,
@@ -517,4 +572,20 @@ mm_at_serial_port_class_init (MMAtSerialPortClass *klass)
                                "Built-in echo removal should be applied",
                                TRUE,
                                G_PARAM_READWRITE));
+
+    g_object_class_install_property
+        (object_class, PROP_INIT_SEQUENCE_ENABLED,
+         g_param_spec_boolean (MM_AT_SERIAL_PORT_INIT_SEQUENCE_ENABLED,
+                               "Init sequence enabled",
+                               "Whether the initialization sequence should be run",
+                               TRUE,
+                               G_PARAM_READWRITE));
+
+    g_object_class_install_property
+        (object_class, PROP_INIT_SEQUENCE,
+         g_param_spec_boxed (MM_AT_SERIAL_PORT_INIT_SEQUENCE,
+                             "Init sequence",
+                             "Initialization sequence",
+                             G_TYPE_STRV,
+                             G_PARAM_READWRITE));
 }

src/mm-at-serial-port.h

@@ -66,6 +66,8 @@ typedef void (*MMAtSerialResponseFn)     (MMAtSerialPort *port,
                                           gpointer user_data);
 
 #define MM_AT_SERIAL_PORT_REMOVE_ECHO           "remove-echo"
+#define MM_AT_SERIAL_PORT_INIT_SEQUENCE_ENABLED "init-sequence-enabled"
+#define MM_AT_SERIAL_PORT_INIT_SEQUENCE         "init-sequence"
 
 struct _MMAtSerialPort {
     MMSerialPort parent;
@@ -120,4 +122,7 @@ void     mm_at_serial_port_set_flags (MMAtSerialPort *self,
 
 MMAtPortFlag mm_at_serial_port_get_flags (MMAtSerialPort *self);
 
+/* Tell the port to run its init sequence, if any, right away */
+void mm_at_serial_port_run_init_sequence (MMAtSerialPort *self);
+
 #endif /* MM_AT_SERIAL_PORT_H */

src/mm-serial-port.c

@@ -947,6 +947,11 @@ mm_serial_port_open (MMSerialPort *self, GError **error)
 success:
     priv->open_count++;
     mm_dbg ("(%s) device open count is %d (open)", device, priv->open_count);
+
+    /* Run additional port config if just opened */
+    if (priv->open_count == 1 && MM_SERIAL_PORT_GET_CLASS (self)->config)
+        MM_SERIAL_PORT_GET_CLASS (self)->config (self);
+
     return TRUE;
 
 error:

src/mm-serial-port.h

@@ -87,11 +87,15 @@ struct _MMSerialPortClass {
                                    GCallback callback,
                                    gpointer callback_data);
 
-    /* Called to configure the serial port after it's opened.  On error, should
+    /* Called to configure the serial port fd after it's opened.  On error, should
      * return FALSE and set 'error' as appropriate.
      */
     gboolean (*config_fd)         (MMSerialPort *self, int fd, GError **error);
 
+    /* Called to configure the serial port after it's opened. Errors, if any,
+     * should get ignored. */
+    void     (*config)            (MMSerialPort *self);
+
     void (*debug_log)             (MMSerialPort *self,
                                    const char *prefix,
                                    const char *buf,