From 86fa139eac0493893e08769a82e3a0eb6ed7bc90 Mon Sep 17 00:00:00 2001
From: Szymon Dziok <b0hoon@o2.pl>
Date: Mon, 28 Jul 2014 22:02:53 +0200
Subject: Support for remote on Samsung YH920/YH925.

Remote buttons are bound to the standard buttons in button-target.h, but they can
have a separate buttonmap, if someone wants.

Change-Id: Id8c78a3dfec0005bf588dc16416870b4c7c56836
---
 firmware/target/arm/samsung/adc-target.h         |  8 +---
 firmware/target/arm/samsung/button-target.h      | 10 ++++
 firmware/target/arm/samsung/button-yh82x_yh92x.c | 60 +++++++++++++++++++++++-
 3 files changed, 71 insertions(+), 7 deletions(-)

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

diff --git a/firmware/target/arm/samsung/adc-target.h b/firmware/target/arm/samsung/adc-target.h
index 1f6a9dcb17..9cca223804 100644
--- a/firmware/target/arm/samsung/adc-target.h
+++ b/firmware/target/arm/samsung/adc-target.h
@@ -28,14 +28,10 @@
 #define ADC_CHANNEL_2   2
 #define ADC_CHANNEL_3   3
 
+#define ADC_REMOTE      ADC_CHANNEL_0
 #define ADC_BATTERY     ADC_CHANNEL_1
-/*
-#define ADC_UNKNOWN_1   1
-#define ADC_REMOTE      2
-#define ADC_SCROLLPAD   3
-*/
-#define ADC_UNREG_POWER ADC_BATTERY /* For compatibility */
 
+#define ADC_UNREG_POWER ADC_BATTERY /* For compatibility */
 
 /* Force a scan now */
 unsigned short adc_scan(int channel);
diff --git a/firmware/target/arm/samsung/button-target.h b/firmware/target/arm/samsung/button-target.h
index 61561dc86d..400c4ed768 100644
--- a/firmware/target/arm/samsung/button-target.h
+++ b/firmware/target/arm/samsung/button-target.h
@@ -26,6 +26,10 @@
 
 /* Button codes for Samsung YH-820, 920, 925 */
 
+#if defined(SAMSUNG_YH920) || defined(SAMSUNG_YH925)
+void remote_int(void);
+#endif /* (SAMSUNG_YH920) || (SAMSUNG_YH925) */
+
 /* Main unit's buttons */
 /* Left = Menu, Right = Sel */
 #define BUTTON_LEFT         0x00000001
@@ -39,6 +43,12 @@
 
 #define BUTTON_MAIN         0x000000ff
 
+#define BUTTON_RC_PLUS      BUTTON_UP
+#define BUTTON_RC_MINUS     BUTTON_DOWN
+#define BUTTON_RC_PLAY      BUTTON_PLAY
+#define BUTTON_RC_REW       BUTTON_REW
+#define BUTTON_RC_FFWD      BUTTON_FFWD
+
 #define POWEROFF_BUTTON BUTTON_PLAY
 #define POWEROFF_COUNT  15
 
diff --git a/firmware/target/arm/samsung/button-yh82x_yh92x.c b/firmware/target/arm/samsung/button-yh82x_yh92x.c
index 1ed8089b90..2874a4a48a 100644
--- a/firmware/target/arm/samsung/button-yh82x_yh92x.c
+++ b/firmware/target/arm/samsung/button-yh82x_yh92x.c
@@ -22,11 +22,64 @@
 #include "system.h"
 #include "button.h"
 #include "backlight.h"
+#if defined(SAMSUNG_YH920) || defined(SAMSUNG_YH925)
+#include "adc.h"
 
+static int int_btn = BUTTON_NONE;
+
+void button_init_device(void)
+{
+    /* remote interrupt - low when key is pressed */
+    GPIOD_ENABLE |= 0x01;
+    GPIOD_OUTPUT_EN &= ~0x01;
+
+    /* disable/reset int */
+    GPIOD_INT_EN  &= ~0x01;
+    GPIOD_INT_CLR |=  0x01;
+
+    /* enable int */
+    GPIOD_INT_LEV &= ~0x01;
+    GPIOD_INT_EN  |=  0x01;
+
+    /* remote PLAY */
+    GPIOD_ENABLE |= 0x02;
+    GPIOD_OUTPUT_EN &= ~0x02;
+}
+
+/* Remote buttons */
+void remote_int(void)
+{
+    int state = 0x01 & ~GPIOD_INPUT_VAL;
+
+    GPIO_CLEAR_BITWISE(GPIOD_INT_EN, 0x01);
+    GPIO_WRITE_BITWISE(GPIOD_INT_LEV, state, 0x01);
+
+    if (state != 0)
+    {
+        /* necessary delay 1msec */
+        udelay(1000);
+        unsigned int val = adc_scan(ADC_REMOTE);
+        if (val > 750) int_btn = BUTTON_RC_MINUS;
+        else
+        if (val > 375) int_btn = BUTTON_RC_PLUS;
+        else
+        if (val > 100) int_btn = BUTTON_RC_REW;
+        else
+        int_btn = BUTTON_RC_FFWD;
+    }
+    else
+    int_btn = BUTTON_NONE;
+
+    GPIO_SET_BITWISE(GPIOD_INT_CLR, 0x01);
+    GPIO_SET_BITWISE(GPIOD_INT_EN, 0x01);
+}
+#else
 void button_init_device(void)
 {
-    /* TODO...for now, hardware initialisation is done by the OF bootloader */
+    /* nothing */
 }
+#endif /* (SAMSUNG_YH920) || (SAMSUNG_YH925) */
+
 
 bool button_hold(void)
 {
@@ -38,7 +91,11 @@ bool button_hold(void)
  */
 int button_read_device(void)
 {
+#if defined(SAMSUNG_YH920) || defined(SAMSUNG_YH925)
+    int btn = int_btn;
+#else
     int btn = BUTTON_NONE;
+#endif /* (SAMSUNG_YH920) || (SAMSUNG_YH925) */
     static bool hold_button = false;
     bool hold_button_old;
 
@@ -65,6 +122,7 @@ int button_read_device(void)
         if ( GPIOB_INPUT_VAL & 0x80) btn |= BUTTON_PLAY;
 #elif defined(SAMSUNG_YH920) || defined(SAMSUNG_YH925)
         if ( GPIOD_INPUT_VAL & 0x04) btn |= BUTTON_PLAY;
+        if ( GPIOD_INPUT_VAL & 0x02) btn |= BUTTON_RC_PLAY; /* Remote PLAY */
 #endif
     }
 
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