From 4f3b84f4c5721b6bef54257a997b7e722f9e69f1 Mon Sep 17 00:00:00 2001
From: Kai Ryu <kai1103@gmail.com>
Date: Thu, 21 Nov 2013 12:33:03 +0900
Subject: [PATCH] Add custom backlight feature

---
 common/backlight.c        | 23 +++++++++++++++++
 keyboard/gh60/backlight.c | 54 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 77 insertions(+)
 create mode 100644 keyboard/gh60/backlight.c

diff --git a/common/backlight.c b/common/backlight.c
index 00dc04a0..f13d9dbc 100644
--- a/common/backlight.c
+++ b/common/backlight.c
@@ -33,6 +33,16 @@ void backlight_init(void)
 
 void backlight_increase(void)
 {
+#ifdef BACKLIGHT_CUSTOM
+    if (backlight_config.enable) {
+        if (backlight_config.level < BACKLIGHT_LEVELS) {
+            backlight_config.level++;
+            eeconfig_write_backlight(backlight_config.raw);
+        }
+        dprintf("backlight custom increase: %u\n", backlight_config.level);
+        backlight_set(backlight_config.level);
+    }
+#else
     if(backlight_config.level < BACKLIGHT_LEVELS)
     {
         backlight_config.level++;
@@ -41,10 +51,22 @@ void backlight_increase(void)
     }
     dprintf("backlight increase: %u\n", backlight_config.level);
     backlight_set(backlight_config.level);
+#endif
 }
 
 void backlight_decrease(void)
 {
+#ifdef BACKLIGHT_CUSTOM
+    if (backlight_config.enable) {
+        if(backlight_config.level > 1)
+        {
+            backlight_config.level--;
+            eeconfig_write_backlight(backlight_config.raw);
+        }
+        dprintf("backlight custom decrease: %u\n", backlight_config.level);
+        backlight_set(backlight_config.level);
+    }
+#else
     if(backlight_config.level > 0)
     {
         backlight_config.level--;
@@ -53,6 +75,7 @@ void backlight_decrease(void)
     }
     dprintf("backlight decrease: %u\n", backlight_config.level);
     backlight_set(backlight_config.level);
+#endif
 }
 
 void backlight_toggle(void)
diff --git a/keyboard/gh60/backlight.c b/keyboard/gh60/backlight.c
new file mode 100644
index 00000000..9a248b52
--- /dev/null
+++ b/keyboard/gh60/backlight.c
@@ -0,0 +1,54 @@
+/*
+Copyright 2013 Kai Ryu <kai1103@gmail.com>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <avr/pgmspace.h>
+#include "backlight.h"
+
+#ifdef GH60_REV_C
+static const uint8_t backlight_table[] PROGMEM = {
+    0, 16, 128, 255
+};
+
+/* Backlight pin configuration
+ * PWM: PB7
+ */
+void backlight_set(uint8_t level)
+{
+    if (level > 0) {
+        // Turn on PWM
+        cli();
+        DDRB |= (1<<PB6);
+        TCCR1A |= ( (1<<WGM10) | (1<<COM1B1) );
+        TCCR1B |= ( (1<<CS11) | (1<<CS10) );
+        sei();
+        // Set PWM
+        OCR1B = pgm_read_byte(&backlight_table[level]);
+    }
+    else {
+        // Turn off PWM
+        cli();
+        DDRB &= ~(1<<PB6);
+        TCCR1A &= ~( (1<<WGM10) | (1<<COM1B1) );
+        TCCR1B &= ~( (1<<CS11) | (1<<CS10) );
+        sei();
+        // Set PWM
+        OCR1B = 0;
+    }
+}
+#endif