From 933cec7399d487c4a50ff602ab6c639e09f75018 Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Sun, 18 Apr 2010 23:39:55 +0000
Subject: [PATCH] Add HX834x register access routines

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2617 42af7a65-404d-4744-a932-0658087f49c3
---
 configs/sam3u-ek/src/up_lcd.c | 39 ++++++++++++++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

diff --git a/configs/sam3u-ek/src/up_lcd.c b/configs/sam3u-ek/src/up_lcd.c
index 9ead815b96..b201e33e8c 100755
--- a/configs/sam3u-ek/src/up_lcd.c
+++ b/configs/sam3u-ek/src/up_lcd.c
@@ -138,10 +138,19 @@
 #define SAM3UEK_BPP          16
 #define SAM3UEK_RGBFMT       FB_FMT_RGB16_565
 
+/* HX834x register select */
+
+#define HX843X_LCD_RS        (1 << 1)
+
 /**************************************************************************************
  * Private Function Protototypes
  **************************************************************************************/
 
+/* Low-level HX834x Register access */
+
+static void sam3u_putreg(uint16_t reg,  uint16_t data);
+static uint16_t sam3u_getreg(uint16_t reg);
+
 /* LCD Data Transfer Methods */
 
 static int sam3u_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer,
@@ -176,7 +185,7 @@ static int sam3u_getcontrast(struct lcd_dev_s *dev);
 static int sam3u_setcontrast(struct lcd_dev_s *dev, unsigned int contrast);
 
 /**************************************************************************************
- * Private Function Protototypes
+ * Private Data
  **************************************************************************************/
 
 /* This is working memory allocated by the LCD driver for each LCD device
@@ -236,6 +245,34 @@ static struct lcd_dev_s g_lcddev_s =
  * Private Functions
  **************************************************************************************/
 
+/**************************************************************************************
+ * Name:  sam3u_putreg
+ *
+ * Description:
+ *   Write to a HX834x register
+ *
+ **************************************************************************************/
+
+static void sam3u_putreg(uint16_t reg,  uint16_t data)
+{
+  putreg16(reg, LCD_BASE);
+  putreg16(data, LCD_BASE + HX843X_LCD_RS);
+}
+
+/**************************************************************************************
+ * Name:  sam3u_getreg
+ *
+ * Description:
+ *   Read from a HX834x register
+ *
+ **************************************************************************************/
+
+static uint16_t sam3u_getreg(uint16_t reg)
+{
+  putreg16(reg, LCD_BASE);
+  return getreg16(LCD_BASE + HX843X_LCD_RS);
+}
+
 /**************************************************************************************
  * Name:  sam3u_putrun
  *