Untested first attempt at a Sansa button driver. Based on work by MrH

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11219 a1c6a512-1295-4272-9138-f99709370657

firmware/target/arm/sandisk/sansa-e200/button-e200.c

@@ -0,0 +1,82 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 by Barry Wardell
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+/* Taken from button-h10.c by Barry Wardell and reverse engineering by MrH. */
+
+#include <stdlib.h>
+#include "config.h"
+#include "cpu.h"
+#include "system.h"
+#include "button.h"
+#include "kernel.h"
+#include "backlight.h"
+#include "system.h"
+
+
+void button_init_device(void)
+{
+    /* Enable all buttons except the wheel */
+    GPIOF_ENABLE |= 0xff;
+}
+
+bool button_hold(void)
+{
+    return (GPIOF_INPUT_VAL & 0x80)?true:false;
+}
+
+/*
+ * Get button pressed from hardware
+ */
+int button_read_device(void)
+{
+    int btn = BUTTON_NONE;
+    unsigned char state;
+    static bool hold_button = false;
+    bool hold_button_old;
+
+    /* Hold */
+    hold_button_old = hold_button;
+    hold_button = button_hold();
+
+#if 0
+#ifndef BOOTLOADER
+    /* light handling */
+    if (hold_button != hold_button_old)
+    {
+        backlight_hold_changed(hold_button);
+    }
+#endif
+#endif
+
+    /* device buttons */
+    if (!hold_button)
+    {
+        /* Read normal buttons */
+        state = GPIOF_INPUT_VAL & 0xff;
+        if ((state & 0x1) == 0) btn |= BUTTON_REC;
+        if ((state & 0x2) == 0) btn |= BUTTON_DOWN;
+        if ((state & 0x4) == 0) btn |= BUTTON_RIGHT;
+        if ((state & 0x8) == 0) btn |= BUTTON_LEFT;
+        if ((state & 0x10) == 0) btn |= BUTTON_SELECT; /* The centre button */
+        if ((state & 0x20) == 0) btn |= BUTTON_UP; /* The "play" button */
+        if ((state & 0x40) == 1) btn |= BUTTON_POWER;
+    }
+
+    return btn;
+}

firmware/target/arm/sandisk/sansa-e200/button-target.h

@@ -1,7 +1,54 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 by Barry Wardell
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
 
-#define BUTTON_POWER        0x00000001
+#ifndef _BUTTON_TARGET_H_
-#define BUTTON_LEFT         0x00000002
+#define _BUTTON_TARGET_H_
+
+#include <stdbool.h>
+#include "config.h"
+
+#define HAS_BUTTON_HOLD
+
+bool button_hold(void);
+void button_init_device(void);
+int button_read_device(void);
+
+/* Sandisk Sansa E200 button codes */
+
+/* Main unit's buttons */
+#define BUTTON_REC          0x00000001
+#define BUTTON_STOP         0x00000002
 #define BUTTON_RIGHT        0x00000004
+#define BUTTON_LEFT         0x00000008
+#define BUTTON_SELECT       0x00000010
+#define BUTTON_PLAY         0x00000020
+#define BUTTON_POWER        0x00000040
+
+#define BUTTON_UP           0x00000080
+#define BUTTON_DOWN         0x00000100
+
+#define BUTTON_MAIN         0x00000fff
+
+/* No Remote control */
+#define BUTTON_REMOTE 0
 
 #define POWEROFF_BUTTON BUTTON_POWER
-#define POWEROFF_COUNT 40
+#define POWEROFF_COUNT 10
+
+#endif /* _BUTTON_TARGET_H_ */