Support USB dedicated charger tracking

Signed-off-by: Philippe De Swert <philippe.deswert@jollamobile.com>

src/usb_moded-dbus.h

@@ -49,6 +49,8 @@
 #define USB_CONNECTED_DIALOG_SHOW	"mode_requested_show_dialog"
 #define USB_PRE_UNMOUNT			"pre-unmount"
 #define RE_MOUNT_FAILED			"mount_failed"
+#define CHARGER_CONNECTED		"charger_connected"
+#define CHARGER_DISCONNECTED		"charger_disconnected"
 
 /* errors */
 #define UMOUNT_ERROR			"Unmounting filesystem failed. Exporting impossible"

src/usb_moded-modes.h

@@ -28,5 +28,6 @@
 #define MODE_ASK		"ask"
 #define MODE_DEVELOPER		"developer_mode"
 #define MODE_MTP		"mtp_mode"
+#define MODE_CHARGER		"dedicated_charger"
 
 char *get_mode_list(void);

src/usb_moded-udev.c

@@ -176,7 +176,7 @@ void hwal_cleanup(void)
 static void udev_parse(struct udev_device *dev)
 {
   const char *tmp;
-  static int cable = 0; /* track if cable was connected as we cannot distinguish charger and cable disconnects */
+  static int cable = 0, charger = 0; /* track if cable was connected as we cannot distinguish charger and cable disconnects */
 
   tmp = udev_device_get_property_value(dev, "POWER_SUPPLY_ONLINE");
   if(!tmp)
@@ -211,11 +211,23 @@ static void udev_parse(struct udev_device *dev)
       cable = 1;
       set_usb_connected(TRUE);
     }
+    if(!strcmp(tmp, "USB_DCP"))
+    {
+      log_debug("UDEV:USB dedicated charger connected\n");
+      charger = 1;
+      set_charger_connected(TRUE);
+    }
   }
   else if(cable)
   {
     log_debug("UDEV:USB cable disconnected\n");
     set_usb_connected(FALSE);
     cable = 0;
   }
+  else if(charger)
+  {
+    log_debug("UDEV:USB dedicated charger disconnected\n");
+    set_charger_connected(FALSE);
+    charger = 0;
+  }
 }

src/usb_moded.c

@@ -158,6 +158,23 @@ static gboolean set_disconnected(gpointer data)
   return FALSE;
 }
 
+/** set and track charger state
+ *
+ */
+void set_charger_connected(gboolean state)
+{
+  if(state)
+  {
+    usb_moded_send_signal(CHARGER_CONNECTED);
+    set_usb_mode(MODE_CHARGER);
+  }
+  else
+  {
+    usb_moded_send_signal(CHARGER_DISCONNECTED);
+    set_usb_mode(MODE_UNDEFINED);
+  }
+}
+
 /** set the chosen usb state
  *
  */
@@ -285,7 +302,7 @@ else if(!strcmp(mode, MODE_DEVELOPER))
 		ret = set_mtp_mode();
 	goto end;
   }
-  else if(!strcmp(mode, MODE_ASK))
+  else if(!strcmp(mode, MODE_ASK) || !strcmp(mode, MODE_CHARGER))
   {
 	ret = 0;
   }

src/usb_moded.h

@@ -60,5 +60,6 @@ void set_usb_module(const char *module);
 const char * get_usb_module(void);
 gboolean get_usb_connection_state(void);
 void set_usb_connection_state(gboolean state);
+void set_charger_connected(gboolean state);
 
 #endif /* USB_MODED_H */