From ef12b3b5c678e4fa44d60061b0c1bc312e589ba1 Mon Sep 17 00:00:00 2001
From: Jens Arnold <amiconn@rockbox.org>
Date: Mon, 12 Nov 2007 18:49:53 +0000
Subject: Hardware controlled backlight brightness for iPod Video and Nano,
 retaining the software PWM fade in/ fade out. * Backlight handling cleanup,
 getting rid of one layer of 'lowlevelness'. * Use atomic GPIO bit
 manipulation for PP502x backlight handling.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15599 a1c6a512-1295-4272-9138-f99709370657
---
 .../arm/s3c2440/gigabeat-fx/backlight-meg-fx.c     | 70 +++++++++++++---------
 .../arm/s3c2440/gigabeat-fx/backlight-target.h     | 22 +++----
 .../target/arm/s3c2440/gigabeat-fx/power-meg-fx.c  |  4 +-
 3 files changed, 52 insertions(+), 44 deletions(-)

(limited to 'firmware/target/arm/s3c2440')

diff --git a/firmware/target/arm/s3c2440/gigabeat-fx/backlight-meg-fx.c b/firmware/target/arm/s3c2440/gigabeat-fx/backlight-meg-fx.c
index c132be5f69..ee8801f99b 100644
--- a/firmware/target/arm/s3c2440/gigabeat-fx/backlight-meg-fx.c
+++ b/firmware/target/arm/s3c2440/gigabeat-fx/backlight-meg-fx.c
@@ -67,18 +67,8 @@ static unsigned char buttonlight_target;
 
 static unsigned short buttonlight_trigger_now;
 
-void __backlight_on(void)
-{
-    backlight_control = BACKLIGHT_CONTROL_ON;
-}
-
-void __backlight_off(void)
-{
-    backlight_control = BACKLIGHT_CONTROL_OFF;
-}
-
 /* Assumes that the backlight has been initialized */
-void __backlight_set_brightness(int brightness)
+void _backlight_set_brightness(int brightness)
 {
     /* stop the interrupt from messing us up */
     backlight_control = BACKLIGHT_CONTROL_IDLE;
@@ -328,17 +318,44 @@ static void led_control_service(void)
 }
 #endif /* BOOTLOADER */
 
-void __buttonlight_on(void)
+static void __backlight_dim(bool dim_now)
+{
+    /* dont let the interrupt tick happen */
+    backlight_control = BACKLIGHT_CONTROL_IDLE;
+    backlight_target = (dim_now == true) ? 0 : backlight_brightness;
+    if(backlight_target==0 && backlight_brightness==0)
+    {
+        if(dim_now == false)
+            backlight_control = BACKLIGHT_CONTROL_ON;
+        else
+            backlight_control = BACKLIGHT_CONTROL_OFF;
+    }
+    else
+        backlight_control = BACKLIGHT_CONTROL_FADE;
+}
+
+void _backlight_on(void)
+{
+    lcd_enable(true);
+    __backlight_dim(false);
+}    
+
+void _backlight_off(void)
+{
+    __backlight_dim(true);
+}
+
+static inline void __buttonlight_on(void)
 {
     buttonlight_control = BUTTONLIGHT_CONTROL_ON;
 }
 
-void __buttonlight_off(void)
+static inline void __buttonlight_off(void)
 {
     buttonlight_control = BUTTONLIGHT_CONTROL_OFF;
 }
 
-void __buttonlight_dim(bool dim_now)
+static void __buttonlight_dim(bool dim_now)
 {
     buttonlight_control = BUTTONLIGHT_CONTROL_IDLE;
     buttonlight_target = (dim_now == true) ? 0 : buttonlight_brightness;
@@ -353,30 +370,27 @@ void __buttonlight_dim(bool dim_now)
         buttonlight_control = BUTTONLIGHT_CONTROL_FADE;
 }
 
-void __backlight_dim(bool dim_now)
+void _buttonlight_on(void)
 {
-    /* dont let the interrupt tick happen */
-    backlight_control = BACKLIGHT_CONTROL_IDLE;
-    backlight_target = (dim_now == true) ? 0 : backlight_brightness;
-    if(backlight_target==0 && backlight_brightness==0)
-    {
-        if(dim_now == false)
-            backlight_control = BACKLIGHT_CONTROL_ON;
-        else
-            backlight_control = BACKLIGHT_CONTROL_OFF;
-    }
+    __buttonlight_dim(false);
+}
+
+void _buttonlight_off(void)
+{
+    if(_buttonlight_timeout>0)
+        __buttonlight_dim(true);
     else
-        backlight_control = BACKLIGHT_CONTROL_FADE;
+        __buttonlight_off();
 }
 
-void __buttonlight_set_brightness(int brightness)
+void _buttonlight_set_brightness(int brightness)
 {
     buttonlight_control = BUTTONLIGHT_CONTROL_IDLE;
     buttonlight_brightness = brightness;
     buttonlight_control = BUTTONLIGHT_CONTROL_SET;
 }
 
-bool __backlight_init(void)
+bool _backlight_init(void)
 {
     buttonlight_brightness = DEFAULT_BRIGHTNESS_SETTING;
     backlight_brightness = DEFAULT_BRIGHTNESS_SETTING;
diff --git a/firmware/target/arm/s3c2440/gigabeat-fx/backlight-target.h b/firmware/target/arm/s3c2440/gigabeat-fx/backlight-target.h
index 0589557791..b899cc977c 100644
--- a/firmware/target/arm/s3c2440/gigabeat-fx/backlight-target.h
+++ b/firmware/target/arm/s3c2440/gigabeat-fx/backlight-target.h
@@ -41,18 +41,12 @@ void __buttonlight_trigger(void);
 /* See enum buttonlight_mode for available functions */
 void __buttonlight_mode(enum buttonlight_mode mode);
 
-bool __backlight_init(void);
-void __backlight_on(void);
-void __backlight_off(void);
-void __backlight_set_brightness(int brightness);
-
-void __buttonlight_set_brightness(int brightness);
-
-void __buttonlight_on(void);
-void __buttonlight_off(void);
-
-/* true: backlight fades off - false: backlight fades on */
-void __backlight_dim(bool dim);
-void __buttonlight_dim(bool dim_now);
-
+bool _backlight_init(void);
+void _backlight_on(void);
+void _backlight_off(void);
+void _backlight_set_brightness(int brightness);
+
+void _buttonlight_set_brightness(int brightness);
+void _buttonlight_on(void);
+void _buttonlight_off(void);
 #endif
diff --git a/firmware/target/arm/s3c2440/gigabeat-fx/power-meg-fx.c b/firmware/target/arm/s3c2440/gigabeat-fx/power-meg-fx.c
index ac37908b05..b9da66e025 100644
--- a/firmware/target/arm/s3c2440/gigabeat-fx/power-meg-fx.c
+++ b/firmware/target/arm/s3c2440/gigabeat-fx/power-meg-fx.c
@@ -63,8 +63,8 @@ bool ide_powered(void)
 void power_off(void)
 {
     /* turn off backlight and wait for 1 second */
-    __backlight_off();
-    __buttonlight_off();
+    _backlight_off();
+    _buttonlight_off();
     sleep(HZ);
     /* set SLEEP bit to on in CLKCON to turn off */
     CLKCON |=(1<<3);
-- 
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