From 6a9aac7a5fd6dab96f8599be5f32ae4c1ddb3df6 Mon Sep 17 00:00:00 2001
From: Bertrik Sikken <bertrik@sikken.nl>
Date: Thu, 1 Sep 2011 16:59:30 +0000
Subject: sansa clipzip: implement lcd_enable

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30407 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/export/config/sansaclipzip.h              |  2 +-
 .../arm/as3525/sansa-clipzip/backlight-clipzip.c   |  8 +++
 .../target/arm/as3525/sansa-clipzip/lcd-clipzip.c  | 57 ++++++++++++++++++++++
 3 files changed, 66 insertions(+), 1 deletion(-)

diff --git a/firmware/export/config/sansaclipzip.h b/firmware/export/config/sansaclipzip.h
index 749439c668..58b19664b8 100644
--- a/firmware/export/config/sansaclipzip.h
+++ b/firmware/export/config/sansaclipzip.h
@@ -48,7 +48,7 @@
 #define LCD_PIXELFORMAT RGB565SWAPPED /* rgb565 swapped */
 
 /* define this if you have LCD enable function */
-//#define HAVE_LCD_ENABLE
+#define HAVE_LCD_ENABLE
 
 #ifndef BOOTLOADER
 /* Define this if your LCD can be put to sleep.
diff --git a/firmware/target/arm/as3525/sansa-clipzip/backlight-clipzip.c b/firmware/target/arm/as3525/sansa-clipzip/backlight-clipzip.c
index 1fae4b3007..e2a175b574 100644
--- a/firmware/target/arm/as3525/sansa-clipzip/backlight-clipzip.c
+++ b/firmware/target/arm/as3525/sansa-clipzip/backlight-clipzip.c
@@ -39,10 +39,18 @@ void _backlight_on(void)
     ascodec_write_pmu(AS3543_BACKLIGHT, 1, 0x91);
     sleep(1);
     ascodec_write_pmu(AS3543_BACKLIGHT, 1, 0x91);
+
+#ifdef HAVE_LCD_ENABLE
+    lcd_enable(true);
+#endif
 }
 
 void _backlight_off(void)
 {
+#ifdef HAVE_LCD_ENABLE
+    lcd_enable(false);
+#endif
+
     GPIOB_PIN(1) = 0;
     
     ascodec_write_pmu(AS3543_BACKLIGHT, 1, 0x91);
diff --git a/firmware/target/arm/as3525/sansa-clipzip/lcd-clipzip.c b/firmware/target/arm/as3525/sansa-clipzip/lcd-clipzip.c
index 47d896a2f3..c828bab61c 100644
--- a/firmware/target/arm/as3525/sansa-clipzip/lcd-clipzip.c
+++ b/firmware/target/arm/as3525/sansa-clipzip/lcd-clipzip.c
@@ -29,6 +29,11 @@
 /* the detected lcd type (0 or 1) */
 static int lcd_type;
 
+#ifdef HAVE_LCD_ENABLE
+/* whether the lcd is currently enabled or not */
+static bool lcd_enabled;
+#endif
+
 /* initialises the host lcd hardware, returns the lcd type */
 int lcd_hw_init(void)
 {
@@ -262,6 +267,57 @@ static void lcd_init_type1(void)
     lcd_write_dat(0x00);
 }
 
+#ifdef HAVE_LCD_ENABLE
+/* enables/disables the lcd */
+void lcd_enable(bool on)
+{
+    lcd_enabled = on;
+
+    if (lcd_type == 0) {
+        if (on) {
+            lcd_write(0x14, 0x00);
+            lcd_write(0x02, 0x01);
+            lcd_write(0xD2, 0x04);
+            lcd_write(0xD0, 0x80);
+            sleep(HZ * 100/1000);
+
+            lcd_write(0xD0, 0x00);
+        }
+        else {
+            lcd_write(0xD2, 0x05);
+            lcd_write(0xD0, 0x80);
+            sleep(HZ * 100/1000);
+
+            lcd_write(0x02, 0x00);
+            lcd_write(0xD0, 0x00);
+            lcd_write(0x14, 0x01);
+        }
+    }
+    else {
+        if (on) {
+            lcd_write_cmd(0x03);
+            lcd_write_dat(0x00);
+
+            lcd_write_cmd(0x02);
+            lcd_write_dat(0x01);
+        }
+        else {
+            lcd_write_cmd(0x02);
+            lcd_write_dat(0x00);
+
+            lcd_write_cmd(0x03);
+            lcd_write_dat(0x01);
+        }
+    }
+}
+
+/* returns true if the lcd is enabled */
+bool lcd_active(void)
+{
+    return lcd_enabled;
+}
+#endif /* HAVE_LCD_ENABLE */
+
 /* initialises the lcd */
 void lcd_init_device(void)
 {
@@ -272,6 +328,7 @@ void lcd_init_device(void)
     else {
         lcd_init_type1();
     }
+    lcd_enable(true);
 }
 
 /* sets up the lcd to receive frame buffer data */
-- 
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