m:robe 100 - enable setting for buttonlight brightness

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17134 a1c6a512-1295-4272-9138-f99709370657

apps/lang/english.lang

@@ -3909,15 +3909,15 @@
   user:
   <source>
     *: none
-    gigabeatf: "Button Light Brightness"
+    gigabeatf,mrobe100: "Button Light Brightness"
   </source>
   <dest>
     *: none
-    gigabeatf: "Button Light Brightness"
+    gigabeatf,mrobe100: "Button Light Brightness"
   </dest>
   <voice>
     *: none
-    gigabeatf: "Button Light Brightness"
+    gigabeatf,mrobe100: "Button Light Brightness"
   </voice>
 </phrase>
 <phrase>

firmware/export/config-mrobe100.h

@@ -75,6 +75,8 @@
 /* define this if you have a light associated with the buttons */
 #define HAVE_BUTTON_LIGHT
 
+#define HAVE_BUTTONLIGHT_BRIGHTNESS
+
 #define BATTERY_CAPACITY_DEFAULT 720 /* default battery capacity */
 
 #ifndef SIMULATOR

firmware/target/arm/olympus/mrobe-100/backlight-mr100.c

@@ -19,9 +19,10 @@
 
 #include "backlight-target.h"
 #include "system.h"
-#include "lcd.h"
+
-#include "backlight.h"
+#define MIN_BRIGHTNESS 0x80ff08ff
-#include "i2c-pp.h"
+
+static const int log_brightness[12] = {0,4,8,12,20,28,40,60,88,124,176,255};
 
 void _backlight_on(void)
 {
@@ -33,23 +34,18 @@ void _backlight_off(void)
     GPO32_ENABLE &= ~0x1000000;
 }
 
+void _buttonlight_set_brightness(int brightness)
+{
+    /* clamp the brightness value */
+    brightness = MAX(0, MIN(15, brightness));
+
+    outl(MIN_BRIGHTNESS-(log_brightness[brightness - 1] << 16), 0x7000a010);
+}
+
 void _buttonlight_on(void)
 {
     /* turn on all touchpad leds */
     GPIOA_OUTPUT_VAL |= BUTTONLIGHT_ALL;
-
-#if 0
-    /* Writing to 0x7000a010 controls the brightness of the leds.
-       This routine fades the leds from dim to bright, like when
-       you first turn the unit on. */
-    unsigned long val = 0x80ff08ff;
-    int i = 0;
-    for (i = 0; i < 16; i++)
-        outl(val, 0x7000a010);
-        udelay(100000);
-        val -= 0x110000;
-    }
-#endif
 }
 
 void _buttonlight_off(void)

firmware/target/arm/olympus/mrobe-100/backlight-target.h

@@ -35,6 +35,7 @@ void _backlight_off(void);
                               BUTTONLIGHT_DISPLAY | BUTTONLIGHT_LEFT  | \
                               BUTTONLIGHT_RIGHT   | BUTTONLIGHT_SCROLL)
 
+void _buttonlight_set_brightness(int brightness);
 void _buttonlight_on(void);
 void _buttonlight_off(void);