Meizu M3: implement rudimentary button driver

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21787 a1c6a512-1295-4272-9138-f99709370657

firmware/target/arm/s5l8700/meizu-m3/button-m3.c

@@ -0,0 +1,69 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2009 Bertrik Sikken
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include <stdbool.h>
+#include "config.h"
+
+#include "inttypes.h"
+#include "s5l8700.h"
+#include "button-target.h"
+
+/*  Button driver for the meizu M3
+
+    TODO: implement buttons based on on touch strip events, for example
+    short touch (select), slide up and down, touching the <> button, etc.
+ */
+
+
+void button_init_device(void)
+{
+    PCON0 &= ~(3 << 10);    /* P0.5 hold switch */
+    PCON1 &= ~(0xF << 0);   /* P1.0 menu button */
+    PCON1 &= ~(0xF << 16);  /* P1.4 play button */
+    PCON3 &= ~(0xF << 12);  /* P3.3 <> button */
+}
+
+int button_read_device(void)
+{
+    int buttons = 0;
+
+    if (button_hold()) {
+        return 0;
+    }
+
+    if ((PDAT1 & (1 << 0)) == 0) {
+        buttons |= BUTTON_MENU;
+    }
+    if ((PDAT1 & (1 << 4)) == 0) {
+        buttons |= BUTTON_PLAY;
+    }
+    if ((PDAT3 & (1 << 3)) == 0) {
+        buttons |= BUTTON_PREVNEXT;
+    }
+    
+    return buttons;
+}
+
+bool button_hold(void)
+{
+    return ((PDAT0 & (1 << 5)) != 0);
+}
+

firmware/target/arm/s5l8700/meizu-m3/button-target.h

@@ -22,7 +22,6 @@
 #define _BUTTON_TARGET_H_
 
 #include <stdbool.h>
-#include "config.h"
 
 #define HAS_BUTTON_HOLD
 
@@ -30,25 +29,21 @@ bool button_hold(void);
 void button_init_device(void);
 int button_read_device(void);
 
-/* Toshiba Gigabeat specific button codes */
+/* Meizu M3 specific button codes */
+#define BUTTON_PREVNEXT     0x00000001
+#define BUTTON_MENU         0x00000002
+#define BUTTON_PLAY         0x00000004
 
-#define BUTTON_LEFT         0x00000001
+/* there are no LEFT/RIGHT buttons, but other parts of the code expect them */
-#define BUTTON_RIGHT        0x00000002
+#define BUTTON_LEFT         0
-#define BUTTON_UP           0x00000004
+#define BUTTON_RIGHT        0
-#define BUTTON_DOWN         0x00000008
 
-#define BUTTON_SELECT       0x00000010
+#define BUTTON_MAIN (BUTTON_PREVNEXT|BUTTON_MENU|BUTTON_PLAY)
 
-#define BUTTON_MENU         0x00000020
+#define BUTTON_REMOTE       0
-#define BUTTON_PLAY         0x00000040
-
-
-#define BUTTON_MAIN (BUTTON_MENU|BUTTON_LEFT|BUTTON_RIGHT\
-                |BUTTON_UP|BUTTON_DOWN|BUTTON_SELECT|BUTTON_PLAY)
-
-#define BUTTON_REMOTE 0
 
 #define POWEROFF_BUTTON BUTTON_PLAY
 #define POWEROFF_COUNT 10
 
 #endif /* _BUTTON_TARGET_H_ */
+