implement the gigabeat backlight driver

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11434 a1c6a512-1295-4272-9138-f99709370657

2 files changed, 40 insertions, 4 deletions

diff --git a/firmware/target/arm/gigabeat/meg-fx/backlight-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/backlight-meg-fx.c
index 8f7c30b5d7..9abf34ccf9 100644
--- a/firmware/target/arm/gigabeat/meg-fx/backlight-meg-fx.c
+++ b/firmware/target/arm/gigabeat/meg-fx/backlight-meg-fx.c
@@ -21,18 +21,25 @@
 #include "system.h"
 #include "backlight.h"
 #include "lcd.h"
+#include "sc606-meg-fx.h"
+
+int confval = SC606_LOW_FREQ;
 
 void __backlight_on(void)
 {
+    confval |= (SC606_LED_A1 | SC606_LED_A2);
+    sc606_write(SC606_REG_CONF, confval);
 }
 
 void __backlight_off(void)
 {
+    confval &= ~(SC606_LED_A1 | SC606_LED_A2);
+    sc606_write(SC606_REG_CONF, confval);
 }
 
-void __backlight_set_brightness(int val)
+void __backlight_set_brightness(int brightness)
 {
-    /* The SC606 LED driver of the gigabeat series
-     * can set the brightness in 64 steps */
-    val &= 0x3F;
+    /* The SC606 LED driver can set the brightness in 64 steps */
+    brightness &= 0x3F;
+    sc606_write(SC606_REG_A, brightness);
 }
diff --git a/firmware/target/arm/gigabeat/meg-fx/sc606-meg-fx.h b/firmware/target/arm/gigabeat/meg-fx/sc606-meg-fx.h
new file mode 100644
index 0000000000..2637c067e0
--- /dev/null
+++ b/firmware/target/arm/gigabeat/meg-fx/sc606-meg-fx.h
@@ -0,0 +1,29 @@
+#include "config.h"
+#include "cpu.h"
+#include <stdbool.h>
+#include "kernel.h"
+#include "system.h"
+#include "hwcompat.h"
+#include "logf.h"
+#include "debug.h"
+#include "string.h"
+
+#define SC606_REG_A      0
+#define SC606_REG_B      1
+#define SC606_REG_C      2
+#define SC606_REG_CONF   3
+
+#define SC606_LED_A1     1 << 0
+#define SC606_LED_A2     1 << 1
+#define SC606_LED_B1     1 << 2
+#define SC606_LED_B2     1 << 3
+#define SC606_LED_C1     1 << 4
+#define SC606_LED_C2     1 << 5
+
+#define SC606_LOW_FREQ   1 << 6
+
+int sc606_write(unsigned char reg, unsigned char data);
+
+int sc606_read(unsigned char reg, unsigned char* data);
+
+void sc606_init(void);