Added new functionality to libopie / ODevice, regarding LCD control (on/off

brightness)

2 files changed, 148 insertions, 20 deletions

diff --git a/libopie/odevice.cpp b/libopie/odevice.cpp
index 95fd6bd..6e3f114 100644
--- a/libopie/odevice.cpp
+++ b/libopie/odevice.cpp
@@ -26,2 +26,3 @@
 #include <linux/soundcard.h>
+#include <math.h>
 
@@ -35,5 +36,10 @@
 
+#include "odevice.h"
 
+// _IO and friends are only defined in kernel headers ...
 
-#include "odevice.h"
+#define OD_IO(type,area,number,args)    (( type << 30 ) | ( area << 8 ) | ( number ) | ( sizeof( args ) << 16 ))
+#define OD_IOW(area,number,args)        OD_IO(1,area,number,args)
+#define OD_IOR(area,number,args)        OD_IO(2,area,number,args)
+#define OD_IORW(area,number,args)       OD_IO(3,area,number,args)
 
@@ -63,2 +69,5 @@ public:
 
+        virtual bool setDisplayBrightness ( int b );
+        virtual int displayBrightnessResolution ( ) const;
+
         virtual void alarmSound ( );
@@ -77,2 +86,5 @@ public:
 
+        virtual bool setDisplayBrightness ( int b );
+        virtual int displayBrightnessResolution ( ) const;
+
         virtual void alarmSound ( );
@@ -109,2 +121,10 @@ ODevice *ODevice::inst ( )
 
+
+/**************************************************
+ *
+ * common
+ *
+ **************************************************/
+
+
 ODevice::ODevice ( )
@@ -131,8 +151,2 @@ ODevice::~ODevice ( )
 
-//#include <linux/apm_bios.h>
-
-//#define APM_IOC_SUSPEND        _IO('A',2)
-
-#define APM_IOC_SUSPEND          (( 0<<30 ) | ( 'A'<<8 ) | ( 2 ) | ( 0<<16 ))
-
 bool ODevice::setPowerButtonHandler ( ODevice::PowerButtonHandler )
@@ -142,2 +156,7 @@ bool ODevice::setPowerButtonHandler ( ODevice::PowerButtonHandler )
 
+//#include <linux/apm_bios.h>
+
+#define APM_IOC_SUSPEND          OD_IO( 0, 'A', 2, 0 )
+
+
 bool ODevice::suspend ( )
@@ -179,2 +198,37 @@ bool ODevice::suspend ( )
 
+//#include <linux/fb.h> better not rely on kernel headers in userspace ...
+
+#define FBIOBLANK             OD_IO( 0, 'F', 0x11, 0 ) // 0x4611
+
+/* VESA Blanking Levels */
+#define VESA_NO_BLANKING      0
+#define VESA_VSYNC_SUSPEND    1
+#define VESA_HSYNC_SUSPEND    2
+#define VESA_POWERDOWN        3
+
+
+bool ODevice::setDisplayStatus ( bool on )
+{
+        if ( d-> m_model == OMODEL_Unknown )
+                return false;
+
+        bool res = false;
+        int fd;
+        
+        if (( fd = ::open ( "/dev/fb0", O_RDWR )) >= 0 ) {
+                res = ( ::ioctl ( fd, FBIOBLANK, on ? VESA_NO_BLANKING : VESA_POWERDOWN ) == 0 );
+                ::close ( fd );
+                }                                                                                       
+        return res;
+}
+
+bool ODevice::setDisplayBrightness ( int )
+{
+        return false;
+}
+
+int ODevice::displayBrightnessResolution ( ) const
+{
+        return 16;
+}
 
@@ -245,7 +299,5 @@ void ODevice::touchSound ( )
         static Sound snd ( "touchsound" );
-//qDebug("touchSound");
-        if ( snd. isFinished ( )) {
+
+        if ( snd. isFinished ( ))
                 snd. play ( );
-        //      qDebug("sound should play");
-                }
 #endif
@@ -272,4 +324,7 @@ bool ODevice::setLed ( uint /*which*/, OLedState /*st*/ )
 
-//#if defined( QT_QWS_IPAQ ) // IPAQ
-
+/**************************************************
+ *
+ * iPAQ
+ *
+ **************************************************/
 
@@ -317,3 +372,3 @@ void ODeviceIPAQ::init ( )
 
-typedef struct h3600_ts_led {
+typedef struct {
   unsigned char OffOnBlink;       /* 0=off 1=on 2=Blink */
@@ -324,6 +379,10 @@ typedef struct h3600_ts_led {
 
+typedef struct {
+        unsigned char mode;
+        unsigned char pwr;
+        unsigned char brightness;
+} FLITE_IN;
 
-// #define IOC_H3600_TS_MAGIC  'f'
-// #define LED_ON                  _IOW(IOC_H3600_TS_MAGIC,  5, struct h3600_ts_led)
-#define LED_ON    (( 1<<30 ) | ( 'f'<<8 ) | ( 5 ) | ( sizeof(struct h3600_ts_led)<<16 )) // _IOW only defined in kernel headers :(
+#define LED_ON    OD_IOW( 'f', 5, LED_IN )
+#define FLITE_ON  OD_IOW( 'f', 7, FLITE_IN )
 
@@ -392,3 +451,3 @@ bool ODeviceIPAQ::setLed ( uint which, OLedState st )
                 if ( fd >= 0 ) {
-                        struct h3600_ts_led leds;
+                        LED_IN leds;
                         ::memset ( &leds, 0, sizeof( leds ));
@@ -435,3 +494,40 @@ bool ODeviceIPAQ::setPowerButtonHandler ( ODevice::PowerButtonHandler p )
 
+bool ODeviceIPAQ::setDisplayBrightness ( int bright )
+{
+        bool res = false;
+        int fd;
+        
+        if ( bright > 255 )
+                bright = 255;
+        if ( bright < 0 )
+                bright = 0;
+
+        // 128 is the maximum if you want a decent lifetime for the LCD
+        
+        bright = (int) (( ::pow ( 2, double( bright ) / 255.0 ) - 1 ) * 128.0 ); // logarithmic
+        //bright = ( bright + 1 ) / 2;
+        
+        if ((( fd = ::open ( "/dev/ts", O_WRONLY )) >= 0 ) ||
+            (( fd = ::open ( "/dev/h3600_ts", O_WRONLY )) >= 0 )) {
+                FLITE_IN bl;
+                bl. mode = 1;
+                bl. pwr = bright ? 1 : 0;
+                bl. brightness = bright;
+                res = ( ::ioctl ( fd, FLITE_ON, &bl ) == 0 );
+                ::close ( fd );
+        }
+        return res;
+}
+
+int ODeviceIPAQ::displayBrightnessResolution ( ) const
+{
+        return 255; // really 128, but logarithmic control is smoother this way
+}
+
 
+/**************************************************
+ *
+ * Zaurus
+ *
+ **************************************************/
 
@@ -522,6 +618,7 @@ typedef struct sharp_led_status {
 
-#define APM_IOCGEVTSRC          (( 2 ) | ( 'A'<<8 ) | ( 203 ) | ( sizeof(int) ))
-#define APM_IOCSEVTSRC          (( 3 ) | ( 'A'<<8 ) | ( 204 ) | ( sizeof(int) ))
+#define APM_IOCGEVTSRC          OD_IOR( 'A', 203, int )
+#define APM_IOCSEVTSRC          OD_IORW( 'A', 204, int )
 #define APM_EVT_POWER_BUTTON    (1 << 0)
 
+#define FL_IOCTL_STEP_CONTRAST    100
 
@@ -623 +720,28 @@ bool ODeviceZaurus::setPowerButtonHandler ( ODevice::PowerButtonHandler p )
 }
+
+
+bool ODeviceZaurus::setDisplayBrightness ( int bright )
+{
+        bool res = false;
+        int fd;
+        
+        if ( bright > 255 )
+                bright = 255;
+        if ( bright < 0 )
+                bright = 0;
+        
+        if (( fd = ::open ( "/dev/fl", O_WRONLY )) >= 0 ) {
+                int bl = ( bright * 4 + 127 ) / 255; // only 4 steps on zaurus
+                if ( bright && !bl )
+                        bl = 1;
+                res = ( ::ioctl ( fd, FL_IOCTL_STEP_CONTRAST, bl ) == 0 );
+                ::close ( fd );
+        }
+        return res;
+}
+
+
+int ODeviceZaurus::displayBrightnessResolution ( ) const 
+{
+        return 4;
+}
diff --git a/libopie/odevice.h b/libopie/odevice.h
index ee01f0f..9dda68e 100644
--- a/libopie/odevice.h
+++ b/libopie/odevice.h
@@ -77,2 +77,6 @@ public:
 
+        virtual bool setDisplayStatus ( bool on );
+        virtual bool setDisplayBrightness ( int brightness );
+        virtual int displayBrightnessResolution ( ) const;
+        
 // information