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authorzecke <zecke>2004-09-15 00:03:10 (UTC)
committer zecke <zecke>2004-09-15 00:03:10 (UTC)
commitedc1f329044600c15cdccdacce2b2d6a776ca4ce (patch) (side-by-side diff)
tree20cd9eebfd75e5c163f128adb7724c61adef1e27 /libopie2
parentd46a01de16c8ad65b00c76beda547970f7972b62 (diff)
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Patch by Till Harbum for SIMpad to more properly use the ChipSelect3
proc filesystem interface. Method introduced: setCS3Bit This method reads the current CS3 Bits before setting the new bit. Using this function allows to toggle the display without overwriting other CS3 bits for example the DECT_ON bit
Diffstat (limited to 'libopie2') (more/less context) (show whitespace changes)
-rw-r--r--libopie2/opiecore/device/odevice_simpad.cpp83
1 files changed, 66 insertions, 17 deletions
diff --git a/libopie2/opiecore/device/odevice_simpad.cpp b/libopie2/opiecore/device/odevice_simpad.cpp
index 2d0160d..fd46b95 100644
--- a/libopie2/opiecore/device/odevice_simpad.cpp
+++ b/libopie2/opiecore/device/odevice_simpad.cpp
@@ -196,6 +196,67 @@ void SIMpad::initButtons()
#define SIMPAD_BACKLIGHT_CONTROL "/proc/driver/mq200/registers/PWM_CONTROL"
#define SIMPAD_BACKLIGHT_MASK 0x00a10044
+
+/*
+ * The SIMpad exposes ChipSelect3 to userspace
+ * via a proc filesystem file. Using this register
+ * one can toggle power of serial, irda, dect circuits
+ * change the video driver and display status and
+ * many more things.
+ * To not lose the current setting we read the current
+ * cs3 setting and toggle the necessary bits and then
+ * write it.
+ */
+static bool setCS3Bit( bool bitset, int bit ) {
+ int cs3_fd = ::open( SIMPAD_BOARDCONTROL, O_RDONLY );
+
+ if ( cs3_fd < 0 )
+ return false;
+
+ static char line[32];
+ int val = 0;
+ bool ok = false;
+
+ /*
+ * try to read and parse the Chipselect3 status
+ * be paranoid and make sure line[31] is null
+ * terminated
+ */
+ while( !ok && ::read(cs3_fd, &line, sizeof(line)) > 0 ) {
+ line[31] = '\0';
+ if (::sscanf(line, "Chipselect3 : %x", &val ))
+ ok = true;
+ }
+
+ ::close(cs3_fd);
+
+ /*
+ * we were not able to find the current value
+ * and as a result we won't set it
+ */
+ if ( !ok )
+ return false;
+
+ /*
+ * change the value
+ */
+ val = bitset ? (val | bit) : (val & ~bit);
+
+ /*
+ * write it back
+ */
+ cs3_fd = ::open( SIMPAD_BOARDCONTROL, O_WRONLY );
+ if ( cs3_fd < 0 )
+ return false;
+
+ ::snprintf(line, sizeof(line), "0x%04x\n", val);
+ ::write(cs3_fd, line, strlen(line));
+ ::close(cs3_fd);
+
+ return true;
+}
+
+
QValueList <OLed> SIMpad::ledList() const
{
QValueList <OLed> vl;
@@ -229,21 +290,12 @@ OLedState SIMpad::ledState ( OLed l ) const
bool SIMpad::setLedState ( OLed l, OLedState st )
{
-#if 0
- static int fd = ::open ( SIMPAD_BOARDCONTROL, O_RDWR | O_NONBLOCK );
-
- /*TODO Implement this like that:
- read from cs3
- && with SIMPAD_LED2_ON
- write to cs3 */
+ if ( l == Led_Power ) {
m_leds [0] = st;
+ setCS3Bit(st == Led_On, SIMPAD_LED2_ON);
return true;
- // }
-// }
-#else
- Q_UNUSED( l )
- Q_UNUSED( st )
-#endif
+ }
+
return false;
}
@@ -310,10 +362,7 @@ bool SIMpad::setDisplayStatus ( bool on )
{
qDebug( "ODevice for SIMpad: setDisplayStatus(%s)", on? "on" : "off" );
-
- QString cmdline = QString().sprintf( "echo %s > /proc/cs3", on ? "0xd41a" : "0xd40a" ); //TODO make better :)
-
- return ( ::system( (const char*) cmdline ) == 0 );
+ return setCS3Bit(on, SIMPAD_DISPLAY_ON);
}