Add support for the MIO283QT2 LCD

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4802 7fd9a85b-ad96-42d3-883c-3090e2eb8679

2 files changed, 1010 insertions, 0 deletions

diff --git a/nuttx/drivers/lcd/Make.defs b/nuttx/drivers/lcd/Make.defs
index d3ea174d2f..26b169391f 100644
--- a/nuttx/drivers/lcd/Make.defs
+++ b/nuttx/drivers/lcd/Make.defs
@@ -55,6 +55,10 @@ ifeq ($(CONFIG_LCD_SSD1289),y)
   CSRCS += ssd1289.c
 endif
 
+ifeq ($(CONFIG_LCD_MIO283QT2),y)
+  CSRCS += mio283qt2.c
+endif
+
 # Include LCD driver build support
 
 DEPPATH += --dep-path lcd
diff --git a/nuttx/drivers/lcd/mio283qt2.c b/nuttx/drivers/lcd/mio283qt2.c
new file mode 100644
index 0000000000..ce373de7e7
--- /dev/null
+++ b/nuttx/drivers/lcd/mio283qt2.c
@@ -0,0 +1,1006 @@
+/**************************************************************************************
+ * drivers/lcd/mio283qt2.c
+ *
+ * This is a driver for the MI0283QT-2 LCD from Multi-Inno Technology Co., Ltd.  This
+ * LCD is based on the Himax HX8347-D LCD controller.
+ *
+ *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+ *   Authors: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * References:
+ * 1) LCD Module Specification, Model : MI0283QT-2, Multi-Inno Technology Co.,
+ *    Ltd., Revision 1.0
+ * 2) Data Sheet: HX8347-D(T), 240RGB x 320 dot, 262K color, with internal GRAM, TFT
+ *    Mobile Single Chip Driver Version 02 March, Doc No. HX8347-D(T)-DS, Himax
+ *    Technologies, Inc., 2009, 
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ **************************************************************************************/
+ 
+/**************************************************************************************
+ * Included Files
+ **************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/spi.h>
+#include <nuttx/lcd/lcd.h>
+#include <nuttx/lcd/mio283qt2.h>
+
+#ifdef CONFIG_LCD_MIO283QT2
+
+/**************************************************************************************
+ * Pre-processor Definitions
+ **************************************************************************************/
+/* Configuration **********************************************************************/
+
+/* Check contrast selection */
+
+#if !defined(CONFIG_LCD_MAXCONTRAST)
+#  define CONFIG_LCD_MAXCONTRAST 1
+#endif
+
+/* Check power setting */
+
+#if !defined(CONFIG_LCD_MAXPOWER) || CONFIG_LCD_MAXPOWER < 1
+#  define CONFIG_LCD_MAXPOWER 1
+#endif
+
+#if CONFIG_LCD_MAXPOWER > 255
+#  error "CONFIG_LCD_MAXPOWER must be less than 256 to fit in uint8_t"
+#endif
+
+/* Check orientation */
+
+#if defined(CONFIG_LCD_PORTRAIT)
+#  if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE) || defined(CONFIG_LCD_RPORTRAIT)
+#    error "Cannot define both portrait and any other orientations"
+#  endif
+#elif defined(CONFIG_LCD_RPORTRAIT)
+#  if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
+#    error "Cannot define both rportrait and any other orientations"
+#  endif
+#elif defined(CONFIG_LCD_LANDSCAPE)
+#  ifdef CONFIG_LCD_RLANDSCAPE
+#    error "Cannot define both landscape and any other orientations"
+#  endif
+#elif !defined(CONFIG_LCD_RLANDSCAPE)
+#  define CONFIG_LCD_LANDSCAPE 1
+#endif
+
+/* Define CONFIG_DEBUG_LCD to enable detailed LCD debug output. Verbose debug must
+ * also be enabled.
+ */
+
+#ifndef CONFIG_DEBUG
+#  undef CONFIG_DEBUG_VERBOSE
+#  undef CONFIG_DEBUG_GRAPHICS
+#  undef CONFIG_DEBUG_LCD
+#endif
+
+#ifndef CONFIG_DEBUG_VERBOSE
+#  undef CONFIG_DEBUG_LCD
+#endif
+
+/* Display/Color Properties ***********************************************************/
+/* Display Resolution */
+
+#if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE) 
+#  define MIO283QT2_XRES       320
+#  define MIO283QT2_YRES       240
+#else
+#  define MIO283QT2_XRES       240
+#  define MIO283QT2_YRES       320
+#endif
+
+/* Color depth and format */
+
+#define MIO283QT2_BPP           16
+#define MIO283QT2_COLORFMT      FB_FMT_RGB16_565
+
+/* Hardware LCD/LCD controller definitions ********************************************/
+/* In this driver, I chose to use all literal constants for register address and
+ * values.  Some recent experiences have shown me that during LCD bringup, it is more
+ * important to know the binary values rather than nice, people friendly names.  Sad,
+ * but true.
+ */
+
+#define HIMAX_ID 0x0047
+
+/* LCD Profiles ***********************************************************************/
+/* Many details of the controller initialization must, unfortunately, vary from LCD to
+ * LCD.  I have looked at the spec and at three different drivers for LCDs that have 
+ * MIO283QT2 controllers.  I have tried to summarize these differences as "LCD profiles"
+ *
+ * Most of the differences between LCDs are nothing more than a few minor bit
+ * settings.  The most significant difference betwen LCD drivers in is the
+ * manner in which the LCD is powered up and in how the power controls are set.
+ * My suggestion is that if you have working LCD initialization code, you should
+ * simply replace the code in mio283qt2_hwinitialize with your working code.
+ */
+
+#if defined (CONFIG_MIO283QT2_PROFILE2)
+#  undef MIO283QT2_USE_SIMPLE_INIT
+
+  /* PWRCTRL1:  AP=smalll-to-medium, DC=Flinex24, BT=+5/-4, DCT=Flinex24 */
+
+#  define PWRCTRL1_SETTING \
+     (MIO283QT2_PWRCTRL1_AP_SMMED | MIO283QT2_PWRCTRL1_DC_FLINEx24 | \
+      MIO283QT2_PWRCTRL1_BT_p5m4  | MIO283QT2_PWRCTRL1_DCT_FLINEx24)
+
+  /* PWRCTRL2: 5.1v */
+
+#  define PWRCTRL2_SETTING MIO283QT2_PWRCTRL2_VRC_5p1V
+
+  /* PWRCTRL3: x 2.165
+   * NOTE: Many drivers have bit 8 set which is not defined in the MIO283QT2 spec.
+   */
+
+#  define PWRCTRL3_SETTING MIO283QT2_PWRCTRL3_VRH_x2p165
+
+   /* PWRCTRL4: VDV=9 + VCOMG */
+
+#  define PWRCTRL4_SETTING (MIO283QT2_PWRCTRL4_VDV(9) | MIO283QT2_PWRCTRL4_VCOMG)
+
+   /* PWRCTRL5: VCM=56 + NOTP */
+
+#  define PWRCTRL5_SETTING (MIO283QT2_PWRCTRL5_VCM(56) | MIO283QT2_PWRCTRL5_NOTP)
+
+#elif defined (CONFIG_MIO283QT2_PROFILE3)
+#  undef MIO283QT2_USE_SIMPLE_INIT
+
+  /* PWRCTRL1:  AP=smalll-to-medium, DC=Flinex24, BT=+5/-4, DCT=Flinex24 */
+
+#  define PWRCTRL1_SETTING \
+     (MIO283QT2_PWRCTRL1_AP_SMMED | MIO283QT2_PWRCTRL1_DC_FLINEx24 | \
+      MIO283QT2_PWRCTRL1_BT_p5m4  | MIO283QT2_PWRCTRL1_DCT_FLINEx24)
+
+  /* PWRCTRL2: 5.1v */
+
+#  define PWRCTRL2_SETTING MIO283QT2_PWRCTRL2_VRC_5p1V
+
+  /* PWRCTRL3: x 2.165
+   * NOTE: Many drivers have bit 8 set which is not defined in the MIO283QT2 spec.
+   */
+
+#  define PWRCTRL3_SETTING MIO283QT2_PWRCTRL3_VRH_x2p165
+
+   /* PWRCTRL4: VDV=9 + VCOMG */
+
+#  define PWRCTRL4_SETTING (MIO283QT2_PWRCTRL4_VDV(9) | MIO283QT2_PWRCTRL4_VCOMG)
+
+   /* PWRCTRL5: VCM=56 + NOTP */
+
+#  define PWRCTRL5_SETTING (MIO283QT2_PWRCTRL5_VCM(56) | MIO283QT2_PWRCTRL5_NOTP)
+
+#else /* if defined (CONFIG_MIO283QT2_PROFILE1) */
+#  undef MIO283QT2_USE_SIMPLE_INIT
+#  define MIO283QT2_USE_SIMPLE_INIT 1
+
+  /* PWRCTRL1:  AP=medium-to-large, DC=Fosc/4, BT=+5/-4, DCT=Fosc/4 */
+
+#  define PWRCTRL1_SETTING \
+     (MIO283QT2_PWRCTRL1_AP_MEDLG | MIO283QT2_PWRCTRL1_DC_FOSd4 | \
+      MIO283QT2_PWRCTRL1_BT_p5m4  | MIO283QT2_PWRCTRL1_DCT_FOSd4)
+
+  /* PWRCTRL2: 5.3v */
+
+#  define PWRCTRL2_SETTING MIO283QT2_PWRCTRL2_VRC_5p3V
+
+  /* PWRCTRL3: x 2.570
+   * NOTE: Many drivers have bit 8 set which is not defined in the MIO283QT2 spec.
+   */
+
+#  define PWRCTRL3_SETTING MIO283QT2_PWRCTRL3_VRH_x2p570
+
+   /* PWRCTRL4: VDV=12 + VCOMG */
+
+#  define PWRCTRL4_SETTING (MIO283QT2_PWRCTRL4_VDV(12) | MIO283QT2_PWRCTRL4_VCOMG)
+
+   /* PWRCTRL5: VCM=60 + NOTP */
+
+#  define PWRCTRL5_SETTING (MIO283QT2_PWRCTRL5_VCM(60) | MIO283QT2_PWRCTRL5_NOTP)
+
+#endif
+
+/* Debug ******************************************************************************/
+
+#ifdef CONFIG_DEBUG_LCD
+#  define lcddbg              dbg
+#  define lcdvdbg             vdbg
+#else
+#  define lcddbg(x...)
+#  define lcdvdbg(x...)
+#endif
+
+/**************************************************************************************
+ * Private Type Definition
+ **************************************************************************************/
+
+/* This structure describes the state of this driver */
+
+struct mio283qt2_dev_s
+{
+  /* Publically visible device structure */
+
+  struct lcd_dev_s dev;
+
+  /* Private LCD-specific information follows */
+
+  FAR struct mio283qt2_lcd_s *lcd;  /* The contained platform-specific, LCD interface */
+  uint8_t power;                  /* Current power setting */
+
+  /* This is working memory allocated by the LCD driver for each LCD device
+   * and for each color plane.  This memory will hold one raster line of data.
+   * The size of the allocated run buffer must therefore be at least
+   * (bpp * xres / 8).  Actual alignment of the buffer must conform to the
+   * bitwidth of the underlying pixel type.
+   *
+   * If there are multiple planes, they may share the same working buffer
+   * because different planes will not be operate on concurrently.  However,
+   * if there are multiple LCD devices, they must each have unique run buffers.
+   */
+
+  uint16_t runbuffer[MIO283QT2_XRES];
+};
+
+/**************************************************************************************
+ * Private Function Protototypes
+ **************************************************************************************/
+/* Low Level LCD access */
+
+static void mio283qt2_putreg(FAR struct mio283qt2_lcd_s *lcd, uint8_t regaddr,
+                           uint16_t regval);
+#ifndef CONFIG_LCD_NOGETRUN
+static uint16_t mio283qt2_readreg(FAR struct mio283qt2_lcd_s *lcd, uint8_t regaddr);
+#endif
+static inline void mio283qt2_gramwrite(FAR struct mio283qt2_lcd_s *lcd, uint16_t rgbcolor);
+#ifndef CONFIG_LCD_NOGETRUN
+static inline void mio283qt2_readsetup(FAR struct mio283qt2_lcd_s *lcd, FAR uint16_t *accum);
+static inline uint16_t mio283qt2_gramread(FAR struct mio283qt2_lcd_s *lcd, FAR uint16_t *accum);
+#endif
+static void mio283qt2_setarea(FAR struct mio283qt2_lcd_s *lcd,
+                              uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1);
+
+/* LCD Data Transfer Methods */
+
+static int mio283qt2_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer,
+             size_t npixels);
+static int mio283qt2_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer,
+             size_t npixels);
+
+/* LCD Configuration */
+
+static int mio283qt2_getvideoinfo(FAR struct lcd_dev_s *dev,
+             FAR struct fb_videoinfo_s *vinfo);
+static int mio283qt2_getplaneinfo(FAR struct lcd_dev_s *dev, unsigned int planeno,
+             FAR struct lcd_planeinfo_s *pinfo);
+
+/* LCD RGB Mapping */
+
+#ifdef CONFIG_FB_CMAP
+#  error "RGB color mapping not supported by this driver"
+#endif
+
+/* Cursor Controls */
+
+#ifdef CONFIG_FB_HWCURSOR
+#  error "Cursor control not supported by this driver"
+#endif
+
+/* LCD Specific Controls */
+
+static int mio283qt2_getpower(FAR struct lcd_dev_s *dev);
+static int mio283qt2_setpower(FAR struct lcd_dev_s *dev, int power);
+static int mio283qt2_getcontrast(FAR struct lcd_dev_s *dev);
+static int mio283qt2_setcontrast(FAR struct lcd_dev_s *dev, unsigned int contrast);
+
+/* Initialization */
+
+static inline int mio283qt2_hwinitialize(FAR struct mio283qt2_dev_s *priv);
+
+/**************************************************************************************
+ * Private Data
+ **************************************************************************************/
+
+/* This driver can support only a signal MIO283QT2 device.  This is due to an
+ * unfortunate decision made whent he getrun and putrun methods were designed. The
+ * following is the single MIO283QT2 driver state instance:
+ */
+
+static struct mio283qt2_dev_s g_lcddev;
+
+/**************************************************************************************
+ * Private Functions
+ **************************************************************************************/
+
+/**************************************************************************************
+ * Name:  mio283qt2_putreg(lcd, 
+ *
+ * Description:
+ *   Write to an LCD register
+ *
+ **************************************************************************************/
+
+static void mio283qt2_putreg(FAR struct mio283qt2_lcd_s *lcd, uint8_t regaddr, uint16_t regval)
+{
+  /* Set the index register to the register address and write the register contents */
+
+  lcd->index(lcd, regaddr);
+  lcd->write(lcd, regval);
+}
+
+/**************************************************************************************
+ * Name:  mio283qt2_readreg
+ *
+ * Description:
+ *   Read from an LCD register
+ *
+ **************************************************************************************/
+
+#ifndef CONFIG_LCD_NOGETRUN
+static uint16_t mio283qt2_readreg(FAR struct mio283qt2_lcd_s *lcd, uint8_t regaddr)
+{
+  /* Set the index register to the register address and read the register contents */
+
+  lcd->index(lcd, regaddr);
+  return lcd->read(lcd);
+}
+#endif
+
+/**************************************************************************************
+ * Name:  mio283qt2_gramselect
+ *
+ * Description:
+ *   Setup to read or write multiple pixels to the GRAM memory
+ *
+ **************************************************************************************/
+
+static inline void mio283qt2_gramselect(FAR struct mio283qt2_lcd_s *lcd)
+{
+  lcd->index(lcd, 0x22);
+}
+
+/**************************************************************************************
+ * Name:  mio283qt2_gramwrite
+ *
+ * Description:
+ *   Setup to read or write multiple pixels to the GRAM memory
+ *
+ **************************************************************************************/
+
+static inline void mio283qt2_gramwrite(FAR struct mio283qt2_lcd_s *lcd, uint16_t data)
+{
+  lcd->write(lcd, data);
+}
+
+/**************************************************************************************
+ * Name:  mio283qt2_readsetup
+ *
+ * Description:
+ *   Prime the operation by reading one pixel from the GRAM memory if necessary for
+ *   this LCD type.  When reading 16-bit gram data, there may be some shifts in the
+ *   returned data:
+ *
+ *   - ILI932x: Discard first dummy read; no shift in the return data
+ *
+ **************************************************************************************/
+
+#ifndef CONFIG_LCD_NOGETRUN
+static inline void mio283qt2_readsetup(FAR struct mio283qt2_lcd_s *lcd, FAR uint16_t *accum)
+{
+  /* Read-ahead one pixel */
+
+  *accum = lcd->read(lcd);
+}
+#endif
+
+/**************************************************************************************
+ * Name:  mio283qt2_gramread
+ *
+ * Description:
+ *   Read one correctly aligned pixel from the GRAM memory.  Possibly shifting the
+ *   data and possibly swapping red and green components.
+ *
+ *   - ILI932x: Unknown -- assuming colors are in the color order 
+ *
+ **************************************************************************************/
+
+#ifndef CONFIG_LCD_NOGETRUN
+static inline uint16_t mio283qt2_gramread(FAR struct mio283qt2_lcd_s *lcd, FAR uint16_t *accum)
+{
+  /* Read the value (GRAM register already selected) */
+
+  return lcd->read(lcd);
+}
+#endif
+
+/**************************************************************************************
+ * Name:  mio283qt2_setarea
+ *
+ * Description:
+ *   Set the cursor position.  In landscape mode, the "column" is actually the physical
+ *   Y position and the "row" is the physical X position.
+ *
+ **************************************************************************************/
+
+static void mio283qt2_setarea(FAR struct mio283qt2_lcd_s *lcd,
+                              uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1)
+{
+   mio283qt2_putreg(lcd, 0x03, (x0 & 0x00ff)); /* set x0 */
+   mio283qt2_putreg(lcd, 0x02, (x0 >> 8));     /* set x0 */
+   mio283qt2_putreg(lcd, 0x05, (x1 & 0x00ff)); /* set x1 */
+   mio283qt2_putreg(lcd, 0x04, (x1 >> 8));     /* set x1 */
+   mio283qt2_putreg(lcd, 0x07, (y0 & 0x00ff)); /* set y0 */
+   mio283qt2_putreg(lcd, 0x06, (y0 >> 8));     /* set y0 */
+   mio283qt2_putreg(lcd, 0x09, (y1 & 0x00ff)); /* set y1 */
+   mio283qt2_putreg(lcd, 0x08, (y1 >> 8));     /* set y1 */
+}
+
+/**************************************************************************************
+ * Name:  mio283qt2_dumprun
+ *
+ * Description:
+ *   Dump the contexts of the run buffer:
+ *
+ *  run     - The buffer in containing the run read to be dumped
+ *  npixels - The number of pixels to dump
+ *
+ **************************************************************************************/
+
+#if 0 /* Sometimes useful */
+static void mio283qt2_dumprun(FAR const char *msg, FAR uint16_t *run, size_t npixels)
+{
+  int i, j;
+
+  lib_rawprintf("\n%s:\n", msg);
+  for (i = 0; i < npixels; i += 16)
+    {
+      up_putc(' ');
+      lib_rawprintf(" ");
+      for (j = 0; j < 16; j++)
+        {
+          lib_rawprintf(" %04x", *run++);
+        }
+      up_putc('\n');
+    }
+}
+#endif
+
+/**************************************************************************************
+ * Name:  mio283qt2_putrun
+ *
+ * Description:
+ *   This method can be used to write a partial raster line to the LCD:
+ *
+ *   row     - Starting row to write to (range: 0 <= row < yres)
+ *   col     - Starting column to write to (range: 0 <= col <= xres-npixels)
+ *   buffer  - The buffer containing the run to be written to the LCD
+ *   npixels - The number of pixels to write to the LCD
+ *             (range: 0 < npixels <= xres-col)
+ *
+ **************************************************************************************/
+
+static int mio283qt2_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer,
+                          size_t npixels)
+{
+  FAR struct mio283qt2_dev_s *priv = &g_lcddev;
+  FAR struct mio283qt2_lcd_s *lcd = priv->lcd;
+  FAR const uint16_t *src = (FAR const uint16_t*)buffer;
+  int i;
+ 
+  /* Buffer must be provided and aligned to a 16-bit address boundary */
+
+  lcdvdbg("row: %d col: %d npixels: %d\n", row, col, npixels);
+  DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0);
+
+  /* Select the LCD */
+
+  lcd->select(lcd);
+
+  /* Write the run to GRAM. */
+
+  mio283qt2_setarea(lcd, col, row, col + npixels - 1, row);
+  mio283qt2_gramselect(lcd);
+
+  for (i = 0; i < npixels; i++)
+    {
+      mio283qt2_gramwrite(lcd, *src);
+      src++;
+    }
+
+  /* De-select the LCD */
+
+  lcd->deselect(lcd);
+  return OK;
+}
+
+/**************************************************************************************
+ * Name:  mio283qt2_getrun
+ *
+ * Description:
+ *   This method can be used to read a partial raster line from the LCD:
+ *
+ *  row     - Starting row to read from (range: 0 <= row < yres)
+ *  col     - Starting column to read read (range: 0 <= col <= xres-npixels)
+ *  buffer  - The buffer in which to return the run read from the LCD
+ *  npixels - The number of pixels to read from the LCD
+ *            (range: 0 < npixels <= xres-col)
+ *
+ **************************************************************************************/
+
+static int mio283qt2_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer,
+                       size_t npixels)
+{
+#ifndef CONFIG_LCD_NOGETRUN
+  FAR struct mio283qt2_dev_s *priv = &g_lcddev;
+  FAR struct mio283qt2_lcd_s *lcd = priv->lcd;
+  FAR uint16_t *dest = (FAR uint16_t*)buffer;
+  uint16_t accum;
+  int i;
+ 
+  /* Buffer must be provided and aligned to a 16-bit address boundary */
+
+  lcdvdbg("row: %d col: %d npixels: %d\n", row, col, npixels);
+  DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0);
+
+  /* Select the LCD */
+
+  lcd->select(lcd);
+
+  /* Read the run from GRAM. */
+
+  /* Select the LCD */
+
+  lcd->select(lcd);
+
+  /* Red the run fram GRAM. */
+
+  mio283qt2_setarea(lcd, col, row, col + npixels - 1, row);
+  mio283qt2_gramselect(lcd);
+
+  /* Prime the pump for unaligned read data */
+
+  mio283qt2_readsetup(lcd, &accum);
+
+  for (i = 0; i < npixels; i++)
+    {
+      *dest++ = mio283qt2_gramread(lcd, &accum);
+    }
+
+  /* De-select the LCD */
+
+  lcd->deselect(lcd);
+  return OK;
+#else
+  return -ENOSYS;
+#endif
+}
+
+/**************************************************************************************
+ * Name:  mio283qt2_getvideoinfo
+ *
+ * Description:
+ *   Get information about the LCD video controller configuration.
+ *
+ **************************************************************************************/
+
+static int mio283qt2_getvideoinfo(FAR struct lcd_dev_s *dev,
+                                 FAR struct fb_videoinfo_s *vinfo)
+{
+  DEBUGASSERT(dev && vinfo);
+  lcdvdbg("fmt: %d xres: %d yres: %d nplanes: 1\n",
+          MIO283QT2_COLORFMT, MIO283QT2_XRES, MIO283QT2_XRES);
+
+  vinfo->fmt     = MIO283QT2_COLORFMT;  /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */
+  vinfo->xres    = MIO283QT2_XRES;      /* Horizontal resolution in pixel columns */
+  vinfo->yres    = MIO283QT2_YRES;      /* Vertical resolution in pixel rows */
+  vinfo->nplanes = 1;                   /* Number of color planes supported */
+  return OK;
+}
+
+/**************************************************************************************
+ * Name:  mio283qt2_getplaneinfo
+ *
+ * Description:
+ *   Get information about the configuration of each LCD color plane.
+ *
+ **************************************************************************************/
+
+static int mio283qt2_getplaneinfo(FAR struct lcd_dev_s *dev, unsigned int planeno,
+                                FAR struct lcd_planeinfo_s *pinfo)
+{
+  FAR struct mio283qt2_dev_s *priv = (FAR struct mio283qt2_dev_s *)dev;
+
+  DEBUGASSERT(dev && pinfo && planeno == 0);
+  lcdvdbg("planeno: %d bpp: %d\n", planeno, MIO283QT2_BPP);
+
+  pinfo->putrun = mio283qt2_putrun;          /* Put a run into LCD memory */
+  pinfo->getrun = mio283qt2_getrun;          /* Get a run from LCD memory */
+  pinfo->buffer = (uint8_t*)priv->runbuffer; /* Run scratch buffer */
+  pinfo->bpp    = MIO283QT2_BPP;             /* Bits-per-pixel */
+  return OK;
+}
+
+/**************************************************************************************
+ * Name:  mio283qt2_getpower
+ *
+ * Description:
+ *   Get the LCD panel power status (0: full off - CONFIG_LCD_MAXPOWER: full on). On
+ *   backlit LCDs, this setting may correspond to the backlight setting.
+ *
+ **************************************************************************************/
+
+static int mio283qt2_getpower(FAR struct lcd_dev_s *dev)
+{
+  lcdvdbg("power: %d\n", 0);
+  return g_lcddev.power;
+}
+
+/**************************************************************************************
+ * Name:  mio283qt2_poweroff
+ *
+ * Description:
+ *   Enable/disable LCD panel power (0: full off - CONFIG_LCD_MAXPOWER: full on). On
+ *   backlit LCDs, this setting may correspond to the backlight setting.
+ *
+ **************************************************************************************/
+
+static int mio283qt2_poweroff(FAR struct mio283qt2_lcd_s *lcd)
+{
+  /* Set the backlight off */
+
+  lcd->backlight(lcd, 0);
+
+  /* Turn the display off */
+
+  mio283qt2_putreg(lcd, 0x28, 0x0000); /* GON=0, DTE=0, D=0 */
+
+  /* Remember the power off state */
+
+  g_lcddev.power = 0;
+  return OK;
+}
+
+/**************************************************************************************
+ * Name:  mio283qt2_setpower
+ *
+ * Description:
+ *   Enable/disable LCD panel power (0: full off - CONFIG_LCD_MAXPOWER: full on). On
+ *   backlit LCDs, this setting may correspond to the backlight setting.
+ *
+ **************************************************************************************/
+
+static int mio283qt2_setpower(FAR struct lcd_dev_s *dev, int power)
+{
+  FAR struct mio283qt2_dev_s *priv = (FAR struct mio283qt2_dev_s *)dev;
+  FAR struct mio283qt2_lcd_s *lcd  = priv->lcd;
+
+  lcdvdbg("power: %d\n", power);
+  DEBUGASSERT((unsigned)power <= CONFIG_LCD_MAXPOWER);
+
+  /* Set new power level */
+
+  if (power > 0)
+    {
+      /* Set the backlight level */
+
+      lcd->backlight(lcd, power);
+
+      /* Then turn the display on:
+       * D=ON(3) CM=0 DTE=1 GON=1 SPT=0 VLE=0 PT=0
+       */
+
+      /* Display on */
+
+      mio283qt2_putreg(lcd, 0x28, 0x0038); /* GON=1, DTE=1, D=2 */
+      up_mdelay(40);
+      mio283qt2_putreg(lcd, 0x28, 0x003c); /* GON=1, DTE=1, D=3 */
+
+      g_lcddev.power = power;
+    }
+  else
+    {
+      /* Turn the display off */
+
+      mio283qt2_poweroff(lcd);
+    }
+
+  return OK;
+}
+
+/**************************************************************************************
+ * Name:  mio283qt2_getcontrast
+ *
+ * Description:
+ *   Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST).
+ *
+ **************************************************************************************/
+
+static int mio283qt2_getcontrast(FAR struct lcd_dev_s *dev)
+{
+  lcdvdbg("Not implemented\n");
+  return -ENOSYS;
+}
+
+/**************************************************************************************
+ * Name:  mio283qt2_setcontrast
+ *
+ * Description:
+ *   Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST).
+ *
+ **************************************************************************************/
+
+static int mio283qt2_setcontrast(FAR struct lcd_dev_s *dev, unsigned int contrast)
+{
+  lcdvdbg("contrast: %d\n", contrast);
+  return -ENOSYS;
+}
+
+/**************************************************************************************
+ * Name:  mio283qt2_hwinitialize
+ *
+ * Description:
+ *   Initialize the LCD hardware.
+ *
+ **************************************************************************************/
+
+static inline int mio283qt2_hwinitialize(FAR struct mio283qt2_dev_s *priv)
+{
+  FAR struct mio283qt2_lcd_s *lcd  = priv->lcd;
+#ifndef CONFIG_LCD_NOGETRUN
+  uint16_t id;
+#endif
+
+  /* Select the LCD */
+
+  lcd->select(lcd);
+
+  /* Read the HIMAX ID registger (0x00) */
+
+#ifndef CONFIG_LCD_NOGETRUN
+  id = mio283qt2_readreg(lcd, 0x00);
+  lcddbg("LCD ID: %04x\n", id);
+
+  /* Check if the ID is for the MIO283QT2 */
+
+  if (id == HIMAX_ID)
+#endif
+    {
+      /* Driving ability */
+
+      mio283qt2_putreg(lcd, 0xea, 0x0000);  /* PTBA[15:8] */
+      mio283qt2_putreg(lcd, 0xeb, 0x0020);  /* PTBA[7:0] */
+      mio283qt2_putreg(lcd, 0xec, 0x000c);  /* STBA[15:8] */
+      mio283qt2_putreg(lcd, 0xed, 0x00c4);  /* STBA[7:0] */
+      mio283qt2_putreg(lcd, 0xe8, 0x0040);  /* OPON[7:0] */
+      mio283qt2_putreg(lcd, 0xe9, 0x0038);  /* OPON1[7:0] */
+      mio283qt2_putreg(lcd, 0xf1, 0x0001);  /* OTPS1B */
+      mio283qt2_putreg(lcd, 0xf2, 0x0010);  /* GEN */
+      mio283qt2_putreg(lcd, 0x27, 0x00a3);
+
+      /* Power voltage */
+
+      mio283qt2_putreg(lcd, 0x1b, 0x001b);  /* VRH = 4.65 */
+      mio283qt2_putreg(lcd, 0x1a, 0x0001);  /* BT */
+      mio283qt2_putreg(lcd, 0x24, 0x002f);  /* VMH */
+      mio283qt2_putreg(lcd, 0x25, 0x0057);  /* VML */
+
+      /* Vcom offset */
+
+      mio283qt2_putreg(lcd, 0x23, 0x008d);  /* For flicker adjust */
+
+      /* Power on */
+
+      mio283qt2_putreg(lcd, 0x18, 0x0036);
+      mio283qt2_putreg(lcd, 0x19, 0x0001); /* Start oscillator */
+      mio283qt2_putreg(lcd, 0x01, 0x0000); /* Wakeup */
+      mio283qt2_putreg(lcd, 0x1f, 0x0088);
+      up_mdelay(5);
+      mio283qt2_putreg(lcd, 0x1f, 0x0080);
+      up_mdelay(5);
+      mio283qt2_putreg(lcd, 0x1f, 0x0090);
+      up_mdelay(5);
+      mio283qt2_putreg(lcd, 0x1f, 0x00d0);
+      up_mdelay(5);
+
+      /* Gamma 2.8 setting  */
+
+      mio283qt2_putreg(lcd, 0x40, 0x0000);
+      mio283qt2_putreg(lcd, 0x41, 0x0000);
+      mio283qt2_putreg(lcd, 0x42, 0x0001);
+      mio283qt2_putreg(lcd, 0x43, 0x0013);
+      mio283qt2_putreg(lcd, 0x44, 0x0010);
+      mio283qt2_putreg(lcd, 0x45, 0x0026);
+      mio283qt2_putreg(lcd, 0x46, 0x0008);
+      mio283qt2_putreg(lcd, 0x47, 0x0051);
+      mio283qt2_putreg(lcd, 0x48, 0x0002);
+      mio283qt2_putreg(lcd, 0x49, 0x0012);
+      mio283qt2_putreg(lcd, 0x4a, 0x0018);
+      mio283qt2_putreg(lcd, 0x4b, 0x0019);
+      mio283qt2_putreg(lcd, 0x4c, 0x0014);
+
+      mio283qt2_putreg(lcd, 0x50, 0x0019);
+      mio283qt2_putreg(lcd, 0x51, 0x002f);
+      mio283qt2_putreg(lcd, 0x52, 0x002c);
+      mio283qt2_putreg(lcd, 0x53, 0x003e);
+      mio283qt2_putreg(lcd, 0x54, 0x003f);
+      mio283qt2_putreg(lcd, 0x55, 0x003f);
+      mio283qt2_putreg(lcd, 0x56, 0x002e);
+      mio283qt2_putreg(lcd, 0x57, 0x0077);
+      mio283qt2_putreg(lcd, 0x58, 0x000b);
+      mio283qt2_putreg(lcd, 0x59, 0x0006);
+      mio283qt2_putreg(lcd, 0x5a, 0x0007);
+      mio283qt2_putreg(lcd, 0x5b, 0x000d);
+      mio283qt2_putreg(lcd, 0x5c, 0x001d);
+      mio283qt2_putreg(lcd, 0x5d, 0x00cc);
+
+      /* 4K Color Selection */
+
+      mio283qt2_putreg(lcd, 0x17, 0x0003);
+      mio283qt2_putreg(lcd, 0x17, 0x0005); /* 0x0005=65k, 0x0006=262k */
+
+      /* Panel characteristics */
+
+      mio283qt2_putreg(lcd, 0x36, 0x0000);
+
+      /* Display Setting */
+
+      mio283qt2_putreg(lcd, 0x01, 0x0000); /* IDMON=0, INVON=0, NORON=0, PTLON=0 */
+
+#if defined(CONFIG_LCD_LANDSCAPE)
+      mio283qt2_putreg(lcd, 0x16, 0x00a8); /* MY=1, MX=0, MV=1, ML=0, BGR=1 */
+#elif defined(CONFIG_LCD_PORTRAIT)
+      mio283qt2_putreg(lcd, 0x16, 0x0008); /* MY=0, MX=0, MV=0, ML=0, BGR=1 */
+#elif defined(CONFIG_LCD_RLANDSCAPE)
+      mio283qt2_putreg(lcd, 0x16, 0x0068); /* MY=0, MX=1, MV=1, ML=0, BGR=1 */
+#elif defined(CONFIG_LCD_RPORTRAIT)
+      mio283qt2_putreg(lcd, 0x16, 0x00c8); /* MY=1, MX=0, MV=1, ML=0, BGR=1 */
+#endif
+
+      /* Window setting */
+
+      mio283qt2_setarea(lcd, 0, 0, (MIO283QT2_XRES-1), (MIO283QT2_YRES-1));
+      return OK;
+    }
+#ifndef CONFIG_LCD_NOGETRUN
+  else
+    {
+      lcddbg("Unsupported LCD type\n");
+      return -ENODEV;
+    }
+#endif
+
+  /* De-select the LCD */
+
+  lcd->deselect(lcd);
+}
+
+ /*************************************************************************************
+ * Public Functions
+ **************************************************************************************/
+
+/**************************************************************************************
+ * Name:  mio283qt2_lcdinitialize
+ *
+ * Description:
+ *   Initialize the LCD video hardware.  The initial state of the LCD is fully
+ *   initialized, display memory cleared, and the LCD ready to use, but with the power
+ *   setting at 0 (full off).
+ *
+ **************************************************************************************/
+
+FAR struct lcd_dev_s *mio283qt2_lcdinitialize(FAR struct mio283qt2_lcd_s *lcd)
+{
+  int ret;
+
+  lcdvdbg("Initializing\n");
+
+  /* If we ccould support multiple MIO283QT2 devices, this is where we would allocate
+   * a new driver data structure... but we can't.  Why not?  Because of a bad should
+   * the form of the getrun() and putrun methods.
+   */
+
+  FAR struct mio283qt2_dev_s *priv = &g_lcddev;
+
+  /* Initialize the driver data structure */
+
+  priv->dev.getvideoinfo = mio283qt2_getvideoinfo;
+  priv->dev.getplaneinfo = mio283qt2_getplaneinfo;
+  priv->dev.getpower     = mio283qt2_getpower;
+  priv->dev.setpower     = mio283qt2_setpower;
+  priv->dev.getcontrast  = mio283qt2_getcontrast;
+  priv->dev.setcontrast  = mio283qt2_setcontrast;
+  priv->lcd              = lcd;
+
+  /* Configure and enable LCD */
+
+  ret = mio283qt2_hwinitialize(priv);
+  if (ret == OK)
+    {
+      /* Clear the display (setting it to the color 0=black) */
+
+      mio283qt2_clear(&priv->dev, 0);
+
+      /* Turn the display off */
+
+      mio283qt2_poweroff(lcd);
+      return &g_lcddev.dev;
+    }
+
+  return NULL;
+}
+
+/**************************************************************************************
+ * Name:  mio283qt2_clear
+ *
+ * Description:
+ *   This is a non-standard LCD interface just for the stm3240g-EVAL board.  Because
+ *   of the various rotations, clearing the display in the normal way by writing a
+ *   sequences of runs that covers the entire display can be very slow.  Here the
+ *   display is cleared by simply setting all GRAM memory to the specified color.
+ *
+ **************************************************************************************/
+
+void mio283qt2_clear(FAR struct lcd_dev_s *dev, uint16_t color)
+{
+  FAR struct mio283qt2_dev_s *priv = (FAR struct mio283qt2_dev_s *)dev;
+  FAR struct mio283qt2_lcd_s *lcd  = priv->lcd;
+  uint32_t i;
+
+  /* Select the LCD and set the drawring area */
+
+  lcd->select(lcd);
+  mio283qt2_setarea(lcd, 0, 0, (MIO283QT2_XRES-1), (MIO283QT2_YRES-1));
+
+  /* Prepare to write GRAM data */
+
+  mio283qt2_gramselect(lcd);
+
+  /* Copy color into all of GRAM.  Orientation does not matter in this case. */
+
+  for (i = 0; i < MIO283QT2_XRES * MIO283QT2_YRES; i++)
+    {
+      mio283qt2_gramwrite(lcd, color);
+    }
+
+  /* De-select the LCD */
+
+  lcd->deselect(lcd);
+}
+
+#endif /* CONFIG_LCD_MIO283QT2 */