touch devices: Disable touch on softlock.

Target that have a touchpad/touchscreen should disable it while
being locked (In order to avoid LCD to drain battery power due to
"key locked" constant reporting messages. If they a have a keylock
button this was already handled at driver level. If not (e.g. fuze+),
they will have to implement a switch at driver level that action.c
can operate on softlock.
This patch does the following for any target having a touchpad
or a touchscreen and no HAS_BUTTON_HOLD (ie any softlock target)
1) it implements the code to call button_enable_touch(bool en) in
action.c.
2) button_enable_touch is implemented in button.c and call
either touchpad_enable or touchscreen_enable
3) those two function are implemented respectively in touchscreen.c
and a new touchpad.c file. They provide a generic way to silents touch's
device and call a function at driver level where target specific code
can be implemented if possible/needed (for power saving for instance).
Those function name are touchpad_enable_device and touchscreen_enable_device
4) we implement an empty function at driver level of targets that need it
to have them still being able to compiled.

Change-Id: I9ead78a25bd33466a8533f5b9f259b395cb5ce49
Reviewed-on: http://gerrit.rockbox.org/569
Reviewed-by: Thomas Martitz <kugel@rockbox.org>
Reviewed-by: Amaury Pouly <amaury.pouly@gmail.com>

apps/action.c

@@ -294,6 +294,10 @@ static int get_action_worker(int context, int timeout,
         {
             last_button = BUTTON_NONE;
             keys_locked = false;
+#if defined(HAVE_TOUCHPAD) || defined(HAVE_TOUCHSCREEN)
+            /* enable back touch device */
+            button_enable_touch(true);
+#endif
             splash(HZ/2, str(LANG_KEYLOCK_OFF));
             return ACTION_REDRAW;
         }
@@ -307,6 +311,13 @@ static int get_action_worker(int context, int timeout,
             return ACTION_REDRAW;
         }
     }
+#if defined(HAVE_TOUCHPAD) || defined(HAVE_TOUCHSCREEN)
+    else
+    {
+        /* make sure touchpad get reactivated if we quit the screen */
+        button_enable_touch(true);
+    }
+#endif
     context &= ~ALLOW_SOFTLOCK;
 #endif /* HAS_BUTTON_HOLD */
 
@@ -373,7 +384,10 @@ static int get_action_worker(int context, int timeout,
         unlock_combo = button;
         keys_locked = true;
         splash(HZ/2, str(LANG_KEYLOCK_ON));
-
+ #if defined(HAVE_TOUCHPAD) || defined(HAVE_TOUCHSCREEN)
+        /* disable touch device on keylock */
+        button_enable_touch(false);
+ #endif
         button_clear_queue();
         return ACTION_REDRAW;
     }

firmware/SOURCES

@@ -1734,3 +1734,7 @@ thread.c
 #endif
 
 #endif /* defined(SIMULATOR) */
+
+#if defined(HAVE_TOUCHPAD)
+drivers/touchpad.c
+#endif

firmware/drivers/button.c

@@ -672,3 +672,15 @@ int button_apply_acceleration(const unsigned int data)
     return delta;
 }
 #endif /* HAVE_WHEEL_ACCELERATION */
+
+#if (defined(HAVE_TOUCHPAD) || defined(HAVE_TOUCHSCREEN)) && !defined(HAS_BUTTON_HOLD)
+void button_enable_touch(bool en)
+{
+#ifdef HAVE_TOUCHPAD
+    touchpad_enable(en);
+#endif
+#ifdef HAVE_TOUCHSCREEN
+    touchscreen_enable(en);
+#endif
+}
+#endif

firmware/drivers/touchpad.c

@@ -0,0 +1,43 @@
+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * Copyright (C) 2013 by Jean-Louis Biasini
+ *
+ * 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 "button.h"
+#include "touchpad.h"
+#include "button-target.h"
+
+static bool touch_enabled = true;
+
+void touchpad_enable(bool en)
+{
+    if(en != touch_enabled)
+    {
+        touch_enabled = en;
+        touchpad_enable_device(en);
+    }
+}
+
+int touchpad_filter(int button)
+{
+    if(!touch_enabled)
+        button &= ~BUTTON_TOUCHPAD;
+    return button;
+}

firmware/drivers/touchscreen.c

@@ -31,6 +31,7 @@
 #define BUTTON_MARGIN_X (int)(LCD_WIDTH * 0.03)
 #define BUTTON_MARGIN_Y (int)(LCD_HEIGHT * 0.03)
 
+static bool touch_enabled = true;
 static enum touchscreen_mode current_mode = TOUCHSCREEN_POINT;
 static const int touchscreen_buttons[3][3] =
 {
@@ -121,6 +122,8 @@ static void map_pixels(int *x, int *y)
 /* TODO: add jitter (and others) filter */
 int touchscreen_to_pixels(int x, int y, int *data)
 {
+    if(!touch_enabled)
+        return 0;
     x &= 0xFFFF;
     y &= 0xFFFF;
 
@@ -169,6 +172,19 @@ enum touchscreen_mode touchscreen_get_mode(void)
     return current_mode;
 }
 
+void touchscreen_enable(bool en)
+{
+    if(en != touch_enabled)
+    {
+        touch_enabled = en;
+        touchscreen_enable_device(en);
+    }
+}
+
+bool touchscreen_is_enabled(void)
+{
+    return touch_enabled;
+}
 
 #if ((CONFIG_PLATFORM & PLATFORM_ANDROID) == 0)
 /* android has an API for this */

firmware/export/button.h

@@ -119,4 +119,12 @@ int touchscreen_last_touch(void);
 #include "touchscreen.h"
 #endif
 
+#ifdef HAVE_TOUCHPAD
+#include "touchpad.h"
+#endif
+
+#if (defined(HAVE_TOUCHPAD) || defined(HAVE_TOUCHSCREEN)) && !defined(HAS_BUTTON_HOLD)
+void button_enable_touch(bool en);
+#endif
+
 #endif /* _BUTTON_H_ */

firmware/export/touchpad.h

@@ -0,0 +1,28 @@
+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * Copyright (C) 2013 by Jean-Louis Biasini
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+#ifndef _TOUCHDEV_H_
+#define _TOUCHDEV_H_
+
+void touchpad_enable(bool en);
+int touchpad_filter(int button);
+
+#endif /* _TOUCHDEV_H_ */

firmware/export/touchscreen.h

@@ -51,5 +51,8 @@ enum touchscreen_mode touchscreen_get_mode(void);
 void touchscreen_disable_mapping(void);
 void touchscreen_reset_mapping(void);
 int touchscreen_get_scroll_threshold(void);
+void touchscreen_enable(bool en);
+void touchscreen_enable_device(bool en);
+bool touchscreen_is_enabled(void);
 
 #endif /* __TOUCHSCREEN_INCLUDE_H_ */

firmware/target/arm/imx233/creative-zenxfi2/button-zenxfi2.c

@@ -104,6 +104,11 @@ static int touch_to_pixels(int *val_x, int *val_y)
     return (x<<16)|y;
 }
 
+void touchscreen_enable_device(bool en)
+{
+    imx233_touchscreen_enable(en);
+}
+
 static int touchscreen_read_device(int *data)
 {
     int x, y;

firmware/target/arm/imx233/sansa-fuzeplus/button-fuzeplus.c

@@ -28,6 +28,7 @@
 #include "string.h"
 #include "usb.h"
 #include "power-imx233.h"
+#include "touchpad.h"
 
 #ifndef BOOTLOADER
 
@@ -274,7 +275,7 @@ static void do_interrupt(void)
     imx233_pinctrl_setup_irq(0, 27, true, true, false, &rmi_attn_cb, 0);
 }
 
-void touchdev_enable(bool en)
+void touchpad_enable_device(bool en)
 {
     t_enable = en;
     queue_post(&rmi_queue, RMI_SET_SLEEP_MODE, en ? RMI_SLEEP_MODE_LOW_POWER : RMI_SLEEP_MODE_SENSOR_SLEEP);
@@ -433,5 +434,5 @@ int button_read_device(void)
         default: 
             break;
     }
-    return res | touchpad_read_device();
+    return res | touchpad_filter(touchpad_read_device());
 }

firmware/target/arm/imx233/sansa-fuzeplus/button-target.h

@@ -24,7 +24,7 @@
 #include <stdbool.h>
 bool button_debug_screen(void);
 void touchpad_set_sensitivity(int level);
-void touchdev_enable(bool en);
+void touchpad_enable_device(bool en);
 
 /* Main unit's buttons */
 #define BUTTON_POWER                0x00000001
@@ -47,6 +47,10 @@ void touchdev_enable(bool en);
                      BUTTON_PLAYPAUSE|BUTTON_BACK| \
                      BUTTON_BOTTOMRIGHT|BUTTON_BOTTOMLEFT)
 
+#define BUTTON_TOUCHPAD (BUTTON_LEFT|BUTTON_UP|BUTTON_RIGHT|BUTTON_DOWN| \
+                         BUTTON_SELECT|BUTTON_PLAYPAUSE|BUTTON_BACK| \
+                         BUTTON_BOTTOMRIGHT|BUTTON_BOTTOMLEFT)
+
 /* Software power-off */
 #define POWEROFF_BUTTON BUTTON_POWER
 #define POWEROFF_COUNT 10

firmware/target/hosted/android/button-android.c

@@ -129,6 +129,11 @@ void button_init_device(void)
     set_rockbox_ready();
 }
 
+void touchscreen_enable_device(bool en)
+{
+    (void)en; /* FIXME: do something smart */
+}
+
 int button_read_device(int *data)
 {
     int btn = last_btns;

firmware/target/hosted/sdl/button-sdl.c

@@ -393,10 +393,14 @@ static void button_event(int key, bool pressed)
 #endif
     default:
 #ifdef HAVE_TOUCHSCREEN
+        if(touchscreen_is_enabled())
             new_btn = key_to_touch(key, mouse_coords);
         if (!new_btn)
 #endif
             new_btn = key_to_button(key);
+#ifdef HAVE_TOUCHPAD
+        new_btn = touchpad_filter(new_btn);
+#endif
         break;
     }
     /* Call to make up for scrollwheel target implementation.  This is

firmware/target/mips/ingenic_jz47xx/onda_vx747/sadc-onda_vx747.c

@@ -300,3 +300,10 @@ void adc_close(void)
     sleep(20);
     __cpm_stop_sadc();
 }
+
+#ifndef HAS_BUTTON_HOLD
+void touchscreen_enable_device(bool en)
+{
+    (void)en; /* FIXME: do something smart */
+}
+#endif

uisimulator/common/stubs.c

@@ -381,3 +381,17 @@ void touchpad_set_sensitivity(int level)
     (void)level;
 }
 #endif
+
+#if defined(HAVE_TOUCHSCREEN) && !defined HAS_BUTTON_HOLD
+void touchscreen_enable_device(bool en)
+{
+    (void)en;
+}
+#endif
+
+#if defined(HAVE_TOUCHPAD) && !defined HAS_BUTTON_HOLD
+void touchpad_enable_device(bool en)
+{
+    (void)en;
+}
+#endif