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
@@ -23,8 +23,9 @@
 #include <sys/ioctl.h>
 #include <signal.h>
 #include <sys/time.h>
 #include <linux/soundcard.h>
+#include <math.h>
 
 #include <qapplication.h>
 
 #include <qfile.h>
@@ -32,11 +33,16 @@
 #include <qpe/sound.h>
 #include <qpe/resource.h>
 #include <qpe/config.h>
 
+#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)
 
 
 class ODeviceData {
 public:
@@ -60,8 +66,11 @@ protected:
         
 public:
         virtual bool setPowerButtonHandler ( PowerButtonHandler h );
 
+        virtual bool setDisplayBrightness ( int b );
+        virtual int displayBrightnessResolution ( ) const;
+
         virtual void alarmSound ( );
 
         virtual uint hasLeds ( ) const;
         virtual OLedState led ( uint which ) const;
@@ -74,8 +83,11 @@ protected:
 
         public:
         virtual bool setPowerButtonHandler ( PowerButtonHandler h );
 
+        virtual bool setDisplayBrightness ( int b );
+        virtual int displayBrightnessResolution ( ) const;
+
         virtual void alarmSound ( );
         virtual void keySound ( );
                 virtual void touchSound ( );
 
@@ -106,8 +118,16 @@ ODevice *ODevice::inst ( )
         }
         return dev;
 }
 
+
+/**************************************************
+ *
+ * common
+ *
+ **************************************************/
+
+
 ODevice::ODevice ( )
 {
         d = new ODeviceData;
 
@@ -128,19 +148,18 @@ ODevice::~ODevice ( )
 {
         delete d;
 }
 
-//#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 )
 {
         return false;
 }
 
+//#include <linux/apm_bios.h>
+
+#define APM_IOC_SUSPEND          OD_IO( 0, 'A', 2, 0 )
+
+
 bool ODevice::suspend ( )
 {
         if ( d-> m_model == OMODEL_Unknown ) // better don't suspend in qvfb / on unkown devices
                 return false;
@@ -176,8 +195,43 @@ bool ODevice::suspend ( )
         
         return res;
 }
 
+//#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;
+}
 
 QString ODevice::vendorString ( )
 {
         return d-> m_vendorstr;
@@ -242,13 +296,11 @@ void ODevice::touchSound ( )
 
 #ifndef QT_QWS_EBX
 #ifndef QT_NO_SOUND
         static Sound snd ( "touchsound" );
-//qDebug("touchSound");
-        if ( snd. isFinished ( )) {
+
+        if ( snd. isFinished ( ))
                 snd. play ( );
-        //      qDebug("sound should play");
-                }
 #endif
 #endif
 }
 
@@ -269,10 +321,13 @@ bool ODevice::setLed ( uint /*which*/, OLedState /*st*/ )
 
 
 
 
-//#if defined( QT_QWS_IPAQ ) // IPAQ
-
+/**************************************************
+ *
+ * iPAQ
+ *
+ **************************************************/
 
 void ODeviceIPAQ::init ( )
 {
         d-> m_vendorstr = "HP";
@@ -314,19 +369,23 @@ void ODeviceIPAQ::init ( )
 }
 
 //#include <linux/h3600_ts.h>  // including kernel headers is evil ...
 
-typedef struct h3600_ts_led {
+typedef struct {
   unsigned char OffOnBlink;       /* 0=off 1=on 2=Blink */
   unsigned char TotalTime;        /* Units of 5 seconds */
   unsigned char OnTime;           /* units of 100m/s */
   unsigned char OffTime;          /* units of 100m/s */
 } LED_IN;
 
+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 )
 
 
 void ODeviceIPAQ::alarmSound ( )
 {
@@ -389,9 +448,9 @@ bool ODeviceIPAQ::setLed ( uint which, OLedState st )
         static int fd = ::open ( "/dev/touchscreen/0", O_RDWR|O_NONBLOCK );
 
         if ( which == 0 ) {
                 if ( fd >= 0 ) {
-                        struct h3600_ts_led leds;
+                        LED_IN leds;
                         ::memset ( &leds, 0, sizeof( leds ));
                         leds. TotalTime  = 0;
                         leds. OnTime     = 0;
                         leds. OffTime    = 1;
@@ -432,9 +491,46 @@ bool ODeviceIPAQ::setPowerButtonHandler ( ODevice::PowerButtonHandler p )
         return res;
 }
 
 
+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
+ *
+ **************************************************/
 
 
 
 void ODeviceZaurus::init ( )
@@ -519,12 +615,13 @@ typedef struct sharp_led_status {
 #define LED_MAIL_UNREAD_MAIL_EX  2   /* for SHARP_LED_MAIL_EXISTS */
 
 // #include <asm/sharp_apm.h> // including kernel headers is evil ...
 
-#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
 
 
 void ODeviceZaurus::buzzer ( int sound )
 {
@@ -620,4 +717,31 @@ bool ODeviceZaurus::setPowerButtonHandler ( ODevice::PowerButtonHandler p )
                 perror ( "/dev/apm_bios or /dev/misc/apm_bios" );
                 
     return res;
 }
+
+
+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
@@ -74,8 +74,12 @@ public:
 
         virtual bool setPowerButtonHandler ( PowerButtonHandler h );
         virtual bool suspend ( );
 
+        virtual bool setDisplayStatus ( bool on );
+        virtual bool setDisplayBrightness ( int brightness );
+        virtual int displayBrightnessResolution ( ) const;
+        
 // information
 
         QString modelString ( ); 
         OModel model ( );