SAM4E-EK: Remove bogus LCD driver; replace with information that might be useful to someone who wants to develop an LCD driver for the SAM4E-EK

5 files changed, 397 insertions, 1117 deletions

diff --git a/nuttx/configs/sam4e-ek/Kconfig b/nuttx/configs/sam4e-ek/Kconfig
index 382c8db56..470dbd8b8 100644
--- a/nuttx/configs/sam4e-ek/Kconfig
+++ b/nuttx/configs/sam4e-ek/Kconfig
@@ -62,4 +62,17 @@ config SAM4EEK_HSMCI_BLOCKDEVICE
 
 endchoice # AT25 serial FLASH configuration
 
+config SAM4EEK_ILI9325
+	bool "ILI9325-based LCD"
+	default n
+	depends on EXPERIMENTAL
+	select NX
+	select NX_LCDDRIVER
+	---help---
+		This option enables support for the SAM4E-EK on-board LCD. The
+		SAM4E-EK carries a TFT transmissive LCD module with touch panel,
+		FTM280C34D. Its integrated driver IC is ILI9325. The LCD display
+		area is 2.8 inches diagonally measured, with a native resolution
+		of 240 x 320 dots.
+
 endif # ARCH_BOARD_SAM4EEK
diff --git a/nuttx/configs/sam4e-ek/README.txt b/nuttx/configs/sam4e-ek/README.txt
index fc1086aa2..3f00a47de 100644
--- a/nuttx/configs/sam4e-ek/README.txt
+++ b/nuttx/configs/sam4e-ek/README.txt
@@ -24,6 +24,7 @@ Contents
   - USB Full-Speed Device
   - HSMCI
   - Touchscreen
+  - ILI9325-Based LCD
   - SAM4E-EK-specific Configuration Options
   - Configurations
 
@@ -845,49 +846,160 @@ HSMCI
 Touchscreen
 ===========
 
-    The NSH configuration can be used to verify the ADS7843E touchscreen on
-    the SAM4E-EK LCD.  With these modifications, you can include the touchscreen
-    test program at apps/examples/touchscreen as an NSH built-in application.
-    You can enable the touchscreen and test by modifying the default
-    configuration in the following ways:
-
-      Device Drivers
-        CONFIG_SPI=y                          : Enable SPI support
-        CONFIG_SPI_EXCHANGE=y                 : The exchange() method is supported
-        CONFIG_SPI_OWNBUS=y                   : Smaller code if this is the only SPI device
-
-        CONFIG_INPUT=y                        : Enable support for input devices
-        CONFIG_INPUT_ADS7843E=y               : Enable support for the XPT2046
-        CONFIG_ADS7843E_SPIDEV=2              : Use SPI CS 2 for communication
-        CONFIG_ADS7843E_SPIMODE=0             : Use SPI mode 0
-        CONFIG_ADS7843E_FREQUENCY=1000000     : SPI BAUD 1MHz
-        CONFIG_ADS7843E_SWAPXY=y              : If landscape orientation
-        CONFIG_ADS7843E_THRESHX=51            : These will probably need to be tuned
-        CONFIG_ADS7843E_THRESHY=39
-
-      System Type -> Peripherals:
-        CONFIG_SAM34_SPI0=y                   : Enable support for SPI
-
-      System Type:
-        CONFIG_SAM34_GPIO_IRQ=y               : GPIO interrupt support
-        CONFIG_SAM34_GPIOA_IRQ=y              : Enable GPIO interrupts from port A
-
-      RTOS Features:
-        CONFIG_DISABLE_SIGNALS=n              : Signals are required
-
-      Library Support:
-        CONFIG_SCHED_WORKQUEUE=y              : Work queue support required
-
-      Application Configuration:
-        CONFIG_EXAMPLES_TOUCHSCREEN=y         : Enable the touchscreen built-in test
-
-      Defaults should be okay for related touchscreen settings.  Touchscreen
-      debug output on UART0 can be enabled with:
-
-      Build Setup:
-        CONFIG_DEBUG=y                    : Enable debug features
-        CONFIG_DEBUG_VERBOSE=y            : Enable verbose debug output
-        CONFIG_DEBUG_INPUT=y              : Enable debug output from input devices
+  The NSH configuration can be used to verify the ADS7843E touchscreen on
+  the SAM4E-EK LCD.  With these modifications, you can include the touchscreen
+  test program at apps/examples/touchscreen as an NSH built-in application.
+  You can enable the touchscreen and test by modifying the default
+  configuration in the following ways:
+
+    Device Drivers
+      CONFIG_SPI=y                          : Enable SPI support
+      CONFIG_SPI_EXCHANGE=y                 : The exchange() method is supported
+      CONFIG_SPI_OWNBUS=y                   : Smaller code if this is the only SPI device
+
+      CONFIG_INPUT=y                        : Enable support for input devices
+      CONFIG_INPUT_ADS7843E=y               : Enable support for the XPT2046
+      CONFIG_ADS7843E_SPIDEV=2              : Use SPI CS 2 for communication
+      CONFIG_ADS7843E_SPIMODE=0             : Use SPI mode 0
+      CONFIG_ADS7843E_FREQUENCY=1000000     : SPI BAUD 1MHz
+      CONFIG_ADS7843E_SWAPXY=y              : If landscape orientation
+      CONFIG_ADS7843E_THRESHX=51            : These will probably need to be tuned
+      CONFIG_ADS7843E_THRESHY=39
+
+    System Type -> Peripherals:
+      CONFIG_SAM34_SPI0=y                   : Enable support for SPI
+
+    System Type:
+      CONFIG_SAM34_GPIO_IRQ=y               : GPIO interrupt support
+      CONFIG_SAM34_GPIOA_IRQ=y              : Enable GPIO interrupts from port A
+
+    RTOS Features:
+      CONFIG_DISABLE_SIGNALS=n              : Signals are required
+
+    Library Support:
+      CONFIG_SCHED_WORKQUEUE=y              : Work queue support required
+
+    Application Configuration:
+      CONFIG_EXAMPLES_TOUCHSCREEN=y         : Enable the touchscreen built-in test
+
+    Defaults should be okay for related touchscreen settings.  Touchscreen
+    debug output on UART0 can be enabled with:
+
+    Build Setup:
+      CONFIG_DEBUG=y                    : Enable debug features
+      CONFIG_DEBUG_VERBOSE=y            : Enable verbose debug output
+      CONFIG_DEBUG_INPUT=y              : Enable debug output from input devices
+
+  STATUS
+    2014-3-27: As of this writing, the touchscreen is untested.
+
+ILI9325-Based LCD
+=================
+
+  The SAM4E-EK carries a TFT transmissive LCD module with touch panel,
+  FTM280C34D. Its integrated driver IC is ILI9325. The LCD display area is
+  2.8 inches diagonally measured, with a native resolution of 240 x 320
+  dots.
+
+  No driver has been developed for the SAM4E-EK LCD as of this writing.
+  Some technical information follows might be useful to anyone who is
+  inspired to develop that driver:
+
+  Connectivity
+  ------------
+
+    The SAM4E16 communicates with the LCD through PIOC where an 8-bit
+    parallel "8080-like" protocol data bus has to be implemented in
+    software.
+
+    ---- ----- --------- --------------------------------
+    PIN  PIO   SIGNAL    NOTES
+    ---- ----- --------- --------------------------------
+      1                  VDD
+      2  PC7   DB17
+      3  PC6   DB16
+      4  PC5   DB15
+      5  PC4   DB14
+      6  PC3   DB13
+      7  PC2   DB12
+      8  PC1   DB11
+      9  PC0   DB10
+     10        DB9       Pulled low
+     11        DB8       Pulled low
+     12        DB7       Pulled low
+     13        DB6       Pulled low
+     14        DB5       Pulled low
+     15        DB4       Pulled low
+     16        DB3       Pulled low
+     17        DB2       Pulled low
+     18        DB1       Pulled low
+     19        DB0       Pulled low
+    ---- ----- --------- --------------------------------
+     20                  VDD
+     21  PC11  RD
+     22  PC8   WR
+     23  PC19  RS
+     24  PD18  CS        Via J8, pulled high.  Connects to NRST.
+     25        RESET     Connects to NSRST
+     26        IM0       Pulled high
+     27        IM1       Grounded
+     28        GND
+    ---- ----- --------- --------------------------------
+     29 [PC13] LED-A     Backlight controls:  PC13 enables
+     30 [PC13] LEDK1       AAT3155 charge pump that drives
+     31 [PC13] LEDK2       the backlight LEDs
+     32 [PC13] LEDK3
+     33 [PC13] LEDK4
+     34 [PC13] LEDK1
+    ---- ----- --------- --------------------------------
+     35        Y+        These go to the ADS7843
+     36        Y-          touchscreen controller.
+     37        X+
+     38        X-
+     39        NC
+    ---- ----- --------- --------------------------------
+
+    The ILI9325 IM0 and IM1 lines are pulled up and down, respectively.
+    This puts the ILI9325 in the mode "i80-system 16-bit interface DB[17:10],
+    DB[8:1]".  As you can see above, the LCD DB[17:10] connect to PC[0:7];
+    I don't understand why DB[8:1] are grounded???
+
+  Backlight
+  ---------
+
+    LCD backlight is made of 4 white chip LEDs in parallel, driven by an
+    AAT3155 charge pump, MN4. The AAT3155 is controlled by the SAM3U4E
+    through a single line Simple Serial Control (S2Cwire) interface, which
+    permits to enable, disable, and set the LED drive current (LED
+    brightness control) from a 32-level logarithmic scale. Four resistors
+    R93/R94/R95/R96 are implemented for optional current limitation.
+
+  Resources
+  ---------
+
+    If you want to implement LCD support, here are some references that may
+    help you:
+
+    1. Atmel Sample Code (ASF).  There is no example for the SAM4E-EK, but
+       there is for the SAM4S-EK.  The LCD and its processor connectivity
+       appear to be equivalent to the SAM4E-EK so this sample code should be
+       a good place to begin.  NOTE that the clock frequencies may be
+       different and pin usage may be different.  So it may be necessary to
+       adjust the SAM configuration to use this example.
+
+    2. There is an example of an LCD driver for the SAM3U at
+       configs/sam4u-ek/src/up_lcd.c.  That LCD driver is for an LCD with a
+       different LCD controller but should provide the NuttX SAM framework
+       for an LCD driver.
+
+    3. There are other LCD drivers for different MCUs that do support the
+       ILI9325 LCD.  Look at configs/shenzhou/src/up_ili93xx.c,
+       configs/stm3220g-eval/src/up_lcd.c, and
+       configs/stm3240g-eval/src/up_lcd.c.  I believe that the Shenzhou
+       driver is the most recent.
+
+  STATUS:
+    2014-3-27:  Not implemented.
 
 SAM4E-EK-specific Configuration Options
 =======================================
diff --git a/nuttx/configs/sam4e-ek/src/Makefile b/nuttx/configs/sam4e-ek/src/Makefile
index da41230f5..da5dda0cc 100644
--- a/nuttx/configs/sam4e-ek/src/Makefile
+++ b/nuttx/configs/sam4e-ek/src/Makefile
@@ -46,8 +46,8 @@ ifeq ($(CONFIG_HAVE_CXXINITIALIZE),y)
 CSRCS += sam_cxxinitialize.c
 endif
 
-ifeq ($(CONFIG_LCD),y)
-CSRCS += sam_lcd.c
+ifeq ($(CONFIG_SAM4EEK_ILI9325),y)
+CSRCS += sam_ili9325.c
 endif
 
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
diff --git a/nuttx/configs/sam4e-ek/src/sam_ili9523.c b/nuttx/configs/sam4e-ek/src/sam_ili9523.c
new file mode 100644
index 000000000..bff2f05f4
--- /dev/null
+++ b/nuttx/configs/sam4e-ek/src/sam_ili9523.c
@@ -0,0 +1,227 @@
+/**************************************************************************************
+ * configs/sam4e-ek/src/sam_ili9325.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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.
+ *
+ **************************************************************************************/
+
+/**************************************************************************************
+ *
+ * The SAM4E-EK carries a TFT transmissive LCD module with touch panel, FTM280C34D.
+ * Its integrated driver IC is ILI9325. The LCD display area is 2.8 inches diagonally
+ * measured, with a native resolution of 240 x 320 dots.
+ *
+ * The SAM4E16 communicates with the LCD through PIOC where an 8-bit parallel "8080-
+ * like" protocol data bus has to be implemented in software.
+ *
+ *  ---- ----- --------- --------------------------------
+ *  PIN  PIO   SIGNAL    NOTES
+ *  ---- ----- --------- --------------------------------
+ *    1                  VDD
+ *    2  PC7   DB17
+ *    3  PC6   DB16
+ *    4  PC5   DB15
+ *    5  PC4   DB14
+ *    6  PC3   DB13
+ *    7  PC2   DB12
+ *    8  PC1   DB11
+ *    9  PC0   DB10
+ *   10        DB9       Pulled low
+ *   11        DB8       Pulled low
+ *   12        DB7       Pulled low
+ *   13        DB6       Pulled low
+ *   14        DB5       Pulled low
+ *   15        DB4       Pulled low
+ *   16        DB3       Pulled low
+ *   17        DB2       Pulled low
+ *   18        DB1       Pulled low
+ *   19        DB0       Pulled low
+ *  ---- ----- --------- --------------------------------
+ *   20                  VDD
+ *   21  PC11  RD
+ *   22  PC8   WR
+ *   23  PC19  RS
+ *   24  PD18  CS        Via J8, pulled high.  Connects to NRST.
+ *   25        RESET     Connects to NSRST
+ *   26        IM0       Pulled high
+ *   27        IM1       Grounded
+ *   28        GND
+ *  ---- ----- --------- --------------------------------
+ *   29 [PC13] LED-A     Backlight controls:  PC13 enables
+ *   30 [PC13] LEDK1       AAT3155 charge pump that drives
+ *   31 [PC13] LEDK2       the backlight LEDs
+ *   32 [PC13] LEDK3
+ *   33 [PC13] LEDK4
+ *   34 [PC13] LEDK1
+ *  ---- ----- --------- --------------------------------
+ *   35        Y+        These go to the ADS7843
+ *   36        Y-          touchscreen controller.
+ *   37        X+
+ *   38        X-
+ *   39        NC
+ *  ---- ----- --------- --------------------------------
+ *
+ * The ILI9325 IM0 and IM1 lines are pulled up and down, respectively.  This puts
+ * the ILI9325 in the mode "i80-system 16-bit interface DB[17:10], DB[8:1]".  As
+ * you can see above, the LCD DB[17:10] connect to PC[0:7]; I don't understand why
+ * DB[8:1] are grounded???
+ *
+ * LCD backlight is made of 4 white chip LEDs in parallel, driven by an AAT3155
+ * charge pump, MN4. The AAT3155 is controlled by the SAM3U4E through a single line
+ * Simple Serial Control (S2Cwire) interface, which permits to enable, disable, and
+ * set the LED drive current (LED brightness control) from a 32-level logarithmic
+ * scale. Four resistors R93/R94/R95/R96 are implemented for optional current
+ * limitation.
+ *
+ **************************************************************************************/
+
+/**************************************************************************************
+ * Included Files
+ **************************************************************************************/
+
+/**************************************************************************************
+ * Pre-processor Definitions
+ **************************************************************************************/
+
+/* Configuration **********************************************************************/
+
+/* Define the following to enable register-level debug output */
+
+#undef CONFIG_LCD_REGDEBUG
+
+/* Verbose debug must also be enabled */
+
+#ifndef CONFIG_DEBUG
+#  undef CONFIG_DEBUG_VERBOSE
+#  undef CONFIG_DEBUG_LED
+#endif
+
+#ifndef CONFIG_DEBUG_VERBOSE
+#  undef CONFIG_LCD_REGDEBUG
+#endif
+
+/* Debug ******************************************************************************/
+
+#ifdef CONFIG_LCD_REGDEBUG
+#  define regdbg(format, arg...)  vdbg(format, ##arg)
+#else
+#  define regdbg(x...)
+#endif
+
+#ifdef CONFIG_DEBUG_LCD
+#  define lcddbg(format, arg...)  dbg(format, ##arg)
+#  define lcdvdbg(format, arg...) vdbg(format, ##arg)
+#else
+#  define lcddbg(x...)
+#  define lcdvdbg(x...)
+#endif
+
+/**************************************************************************************
+ * Private Type Definition
+ **************************************************************************************/
+
+/**************************************************************************************
+ * Private Function Prototypes
+ **************************************************************************************/
+
+/**************************************************************************************
+ * Private Data
+ **************************************************************************************/
+
+/**************************************************************************************
+ * Private Functions
+ **************************************************************************************/
+
+/**************************************************************************************
+ * Public Functions
+ **************************************************************************************/
+
+/**************************************************************************************
+ * Name:  up_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).
+ *
+ **************************************************************************************/
+
+int up_lcdinitialize(void)
+{
+  /* Not implemented
+   *
+   * If you want to implement LCD support, here are some references:
+   *
+   * 1. Atmel Sample Code (ASF).  There is no example for the SAM4E-EK, but there is for
+   *    the SAM4S-EK.  The LCD and its processor connectivity appear to be equivalent
+   *    to the SAM4E-EK so this sample code should be a good place to begin.  NOTE that
+   *    the clock frequencies may be different and pin usage may be different.  So it
+   *    may be necessary to adjust the SAM configuration to use this example.
+   * 2. There is an example of an LCD driver for the SAM3U at configs/sam4u-ek/src/up_lcd.c.
+   *    That LCD driver is for an LCD with a different LCD controller but should provide
+   *    the NuttX SAM framework for an LCD driver.
+   * 3. There are other LCD drivers for different MCUs that do support the ILI9325
+   *    LCD.  Look at configs/shenzhou/src/up_ili93xx.c, configs/stm3220g-eval/src/up_lcd.c,
+   *    and configs/stm3240g-eval/src/up_lcd.c.  I believe that the Shenzhou driver is
+   *    the most recent.
+   */
+
+  return -ENOSYS;
+}
+
+/**************************************************************************************
+ * Name:  up_lcdgetdev
+ *
+ * Description:
+ *   Return a a reference to the LCD object for the specified LCD.  This allows
+ *   support for multiple LCD devices.
+ *
+ **************************************************************************************/
+
+FAR struct lcd_dev_s *up_lcdgetdev(int lcddev)
+{
+  /* Not implemented */
+
+  return NULL;
+}
+
+/**************************************************************************************
+ * Name:  up_lcduninitialize
+ *
+ * Description:
+ *   Unitialize the framebuffer support.
+ *
+ **************************************************************************************/
+
+void up_lcduninitialize(void)
+{
+  /* Not implemented */
+}
diff --git a/nuttx/configs/sam4e-ek/src/sam_lcd.c b/nuttx/configs/sam4e-ek/src/sam_lcd.c
deleted file mode 100644
index 76c5104ac..000000000
--- a/nuttx/configs/sam4e-ek/src/sam_lcd.c
+++ /dev/null
@@ -1,1072 +0,0 @@
-/**************************************************************************************
- * configs/sam4e-ek/src/sam_lcd.c
- *
- *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
- *   Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * 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.
- *
- **************************************************************************************/
-
-/**************************************************************************************
- *
- * The SAM4E-EK carries a TFT transmissive LCD module with touch panel, FTM280C34D.
- * Its integrated driver IC is ILI9325. The LCD display area is 2.8 inches diagonally
- * measured, with a native resolution of 240 x 320 dots.
- *
- * The SAM4E16 communicates with the LCD through PIOC where an 8-bit parallel "8080-
- * like" protocol data bus has to be implemented in software.
- *
- *  ---- ----- --------- --------------------------------
- *  PIN  PIO   SIGNAL    NOTES
- *  ---- ----- --------- --------------------------------
- *    1                  VDD
- *    2  PC7   DB17
- *    3  PC6   DB16
- *    4  PC5   DB15
- *    5  PC4   DB14
- *    6  PC3   DB13
- *    7  PC2   DB12
- *    8  PC1   DB11
- *    9  PC0   DB10
- *   10        DB9       Pulled low
- *   11        DB8       Pulled low
- *   12        DB7       Pulled low
- *   13        DB6       Pulled low
- *   14        DB5       Pulled low
- *   15        DB4       Pulled low
- *   16        DB3       Pulled low
- *   17        DB2       Pulled low
- *   18        DB1       Pulled low
- *   19        DB0       Pulled low
- *  ---- ----- --------- --------------------------------
- *   20                  VDD
- *   21  PC11  RD
- *   22  PC8   WR
- *   23  PC19  RS
- *   24  PD18  CS        Via J8, pulled high.  Connects to NRST.
- *   25        RESET     Connects to NSRST
- *   26        IM0       Pulled high
- *   27        IM1       Grounded
- *   28        GND
- *  ---- ----- --------- --------------------------------
- *   29 [PC13] LED-A     Backlight controls:  PC13 enables
- *   30 [PC13] LEDK1       AAT3155 charge pump that drives
- *   31 [PC13] LEDK2       the backlight LEDs
- *   32 [PC13] LEDK3
- *   33 [PC13] LEDK4
- *   34 [PC13] LEDK1
- *  ---- ----- --------- --------------------------------
- *   35        Y+        These go to the ADS7843
- *   36        Y-          touchscreen controller.
- *   37        X+
- *   38        X-
- *   39        NC
- *  ---- ----- --------- --------------------------------
- *
- * LCD backlight is made of 4 white chip LEDs in parallel, driven by an AAT3155
- * charge pump, MN4. The AAT3155 is controlled by the SAM3U4E through a single line
- * Simple Serial Control (S2Cwire) interface, which permits to enable, disable, and
- * set the LED drive current (LED brightness control) from a 32-level logarithmic
- * scale. Four resistors R93/R94/R95/R96 are implemented for optional current
- * limitation.
- *
- **************************************************************************************/
-
-/**************************************************************************************
- * 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/lcd/lcd.h>
-#include <nuttx/video/rgbcolors.h>
-
-#include <arch/irq.h>
-
-#include "up_arch.h"
-#include "sam_gpio.h"
-#include "chip/sam_pmc.h"
-#include "chip/sam_smc.h"
-#include "sam4e-ek.h"
-
-/**************************************************************************************
- * Pre-processor Definitions
- **************************************************************************************/
-
-/* Configuration **********************************************************************/
-
-/* Define the following to enable register-level debug output */
-
-#undef CONFIG_LCD_REGDEBUG
-
-/* Verbose debug must also be enabled */
-
-#ifndef CONFIG_DEBUG
-#  undef CONFIG_DEBUG_VERBOSE
-#  undef CONFIG_DEBUG_LED
-#endif
-
-#ifndef CONFIG_DEBUG_VERBOSE
-#  undef CONFIG_LCD_REGDEBUG
-#endif
-
-/* CONFIG_LCD_MAXCONTRAST -- must be defined and less than 32 */
-
-#if !defined(CONFIG_LCD_MAXCONTRAST) || CONFIG_LCD_MAXCONTRAST < 1 || CONFIG_LCD_MAXCONTRAST > 31
-#  error "CONFIG_LCD_MAXCONTRAST must be defined in the range 1 to 31"
-#endif
-
-/* Debug ******************************************************************************/
-
-#ifdef CONFIG_LCD_REGDEBUG
-#  define regdbg(format, arg...)  vdbg(format, ##arg)
-#else
-#  define regdbg(x...)
-#endif
-
-#ifdef CONFIG_DEBUG_LCD
-#  define lcddbg(format, arg...)  dbg(format, ##arg)
-#  define lcdvdbg(format, arg...) vdbg(format, ##arg)
-#else
-#  define lcddbg(x...)
-#  define lcdvdbg(x...)
-#endif
-
-/* Graphics Capbilities ***************************************************************/
-
-/* LCD resolution: 320 (columns) by 240 (rows).  The physical dimensions of the device
- * are really 240 (columns) by 320 (rows), but unless CONFIG_LCD_PORTRAIT is defined,
- * we swap rows and columns in setcursor to make things behave nicer (there IS a
- * performance hit for this swap!).
- */
-
-#ifdef CONFIG_LCD_PORTRAIT
-#  define SAM4EEK_XRES         240
-#  define SAM4EEK_YRES         320
-#else
-#  define SAM4EEK_XRES         320
-#  define SAM4EEK_YRES         240
-#endif
-
-/* Color depth and format. BPP=16 R=6, G=6, B=5: RRRR RBBB BBBG GGGG */
-
-#define SAM4EEK_BPP          16
-#define SAM4EEK_RGBFMT       FB_FMT_RGB16_565
-
-/* HX834x Definitions  ****************************************************************/
-
-/* HX834x register select */
-
-#define HX843X_LCD_RS        (1 << 1)
-
-/* HX8347 ID code */
-#error "The SAM4E-EK has an ILI925 LCD cont
-#define HX8347_CHIPID        0x47
-
-/* HX8347 LCD Registers */
-
-#define HX8347_R00H          0x00
-#define HX8347_R01H          0x01
-#define HX8347_R02H          0x02
-#define HX8347_R03H          0x03
-#define HX8347_R04H          0x04
-#define HX8347_R05H          0x05
-#define HX8347_R06H          0x06
-#define HX8347_R07H          0x07
-#define HX8347_R08H          0x08
-#define HX8347_R09H          0x09
-#define HX8347_R0AH          0x0a
-#define HX8347_R0CH          0x0c
-#define HX8347_R0DH          0x0d
-#define HX8347_R0EH          0x0e
-#define HX8347_R0FH          0x0f
-#define HX8347_R10H          0x10
-#define HX8347_R11H          0x11
-#define HX8347_R12H          0x12
-#define HX8347_R13H          0x13
-#define HX8347_R14H          0x14
-#define HX8347_R15H          0x15
-#define HX8347_R16H          0x16
-#define HX8347_R18H          0x18
-#define HX8347_R19H          0x19
-#define HX8347_R1AH          0x1a
-#define HX8347_R1BH          0x1b
-#define HX8347_R1CH          0x1c
-#define HX8347_R1DH          0x1d
-#define HX8347_R1EH          0x1e
-#define HX8347_R1FH          0x1f
-#define HX8347_R20H          0x20
-#define HX8347_R21H          0x21
-#define HX8347_R22H          0x22
-#define HX8347_R23H          0x23
-#define HX8347_R24H          0x24
-#define HX8347_R25H          0x25
-#define HX8347_R26H          0x26
-#define HX8347_R27H          0x27
-#define HX8347_R28H          0x28
-#define HX8347_R29H          0x29
-#define HX8347_R2AH          0x2a
-#define HX8347_R2BH          0x2b
-#define HX8347_R2CH          0x2c
-#define HX8347_R2DH          0x2d
-#define HX8347_R35H          0x35
-#define HX8347_R36H          0x36
-#define HX8347_R37H          0x37
-#define HX8347_R38H          0x38
-#define HX8347_R39H          0x39
-#define HX8347_R3AH          0x3a
-#define HX8347_R3BH          0x3b
-#define HX8347_R3CH          0x3c
-#define HX8347_R3DH          0x3d
-#define HX8347_R3EH          0x3e
-#define HX8347_R40H          0x40
-#define HX8347_R41H          0x41
-#define HX8347_R42H          0x42
-#define HX8347_R43H          0x43
-#define HX8347_R44H          0x44
-#define HX8347_R45H          0x45
-#define HX8347_R46H          0x46
-#define HX8347_R47H          0x47
-#define HX8347_R48H          0x48
-#define HX8347_R49H          0x49
-#define HX8347_R4AH          0x4a
-#define HX8347_R4BH          0x4b
-#define HX8347_R4CH          0x4c
-#define HX8347_R4DH          0x4d
-#define HX8347_R4EH          0x4e
-#define HX8347_R4FH          0x4f
-#define HX8347_R50H          0x50
-#define HX8347_R51H          0x51
-#define HX8347_R64H          0x64
-#define HX8347_R65H          0x65
-#define HX8347_R66H          0x66
-#define HX8347_R67H          0x67
-#define HX8347_R70H          0x70
-#define HX8347_R72H          0x72
-#define HX8347_R90H          0x90
-#define HX8347_R91H          0x91
-#define HX8347_R93H          0x93
-#define HX8347_R94H          0x94
-#define HX8347_R95H          0x95
-
-/**************************************************************************************
- * Private Type Definition
- **************************************************************************************/
-
-/* This structure describes the state of this driver */
-
-struct sam_dev_s
-{
-  /* Publically visible device structure */
-
-  struct lcd_dev_s dev;
-
-  /* Private device state */
-
-  uint8_t power;    /* The current power setting */
-};
-
-/**************************************************************************************
- * Private Function Protototypes
- **************************************************************************************/
-
-/* Low-level HX834x Register access */
-
-static void sam_putreg(uint16_t reg,  uint16_t data);
-#ifdef CONFIG_DEBUG_LCD
-static uint16_t sam_getreg(uint16_t reg);
-#endif
-
-/* Misc. LCD Helper Functions */
-
-static void sam_setcursor(fb_coord_t row, fb_coord_t col);
-static inline void sam_wrsetup(void);
-static inline void sam_wrram(uint16_t color);
-static inline uint16_t sam_rdram(void);
-static void sam_lcdon(void);
-static void sam_lcdoff(void);
-
-#if 0 /* CONFIG_DEBUG_LCD */
-static void sam_dumpreg(uint8_t startreg, uint8_t endreg);
-#endif
-
-/* LCD Data Transfer Methods */
-
-static int sam_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer,
-             size_t npixels);
-static int sam_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer,
-             size_t npixels);
-
-/* LCD Configuration */
-
-static int sam_getvideoinfo(FAR struct lcd_dev_s *dev,
-             FAR struct fb_videoinfo_s *vinfo);
-static int sam_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 sam_getpower(struct lcd_dev_s *dev);
-static int sam_setpower(struct lcd_dev_s *dev, int power);
-static int sam_getcontrast(struct lcd_dev_s *dev);
-static int sam_setcontrast(struct lcd_dev_s *dev, unsigned int contrast);
-
-/**************************************************************************************
- * Private Data
- **************************************************************************************/
-
-/* 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 therefor 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.
- */
-
-static uint16_t g_runbuffer[SAM4EEK_XRES];
-
-/* This structure describes the overall LCD video controller */
-
-static const struct fb_videoinfo_s g_videoinfo =
-{
-  .fmt     = SAM4EEK_RGBFMT,      /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */
-  .xres    = SAM4EEK_XRES,        /* Horizontal resolution in pixel columns */
-  .yres    = SAM4EEK_YRES,        /* Vertical resolution in pixel rows */
-  .nplanes = 1,                   /* Number of color planes supported */
-};
-
-/* This is the standard, NuttX Plane information object */
-
-static const struct lcd_planeinfo_s g_planeinfo =
-{
-  .putrun = sam_putrun,            /* Put a run into LCD memory */
-  .getrun = sam_getrun,            /* Get a run from LCD memory */
-  .buffer = (uint8_t*)g_runbuffer, /* Run scratch buffer */
-  .bpp    = SAM4EEK_BPP,           /* Bits-per-pixel */
-};
-
-/* This is the standard, NuttX LCD driver object */
-
-static struct sam_dev_s g_lcddev_s =
-{
-  .dev =
-  {
-    /* LCD Configuration */
-
-    .getvideoinfo = sam_getvideoinfo,
-    .getplaneinfo = sam_getplaneinfo,
-
-    /* LCD RGB Mapping -- Not supported */
-    /* Cursor Controls -- Not supported */
-
-    /* LCD Specific Controls */
-
-    .getpower     = sam_getpower,
-    .setpower     = sam_setpower,
-    .getcontrast  = sam_getcontrast,
-    .setcontrast  = sam_setcontrast,
-  },
-};
-
-/**************************************************************************************
- * Private Functions
- **************************************************************************************/
-
-/**************************************************************************************
- * Name:  sam_putreg
- *
- * Description:
- *   Write to a HX834x register
- *
- **************************************************************************************/
-
-static void sam_putreg(uint16_t reg,  uint16_t data)
-{
-  regdbg("base: %08x RS: %04x data: %04x\n", LCD_BASE, LCD_BASE + HX843X_LCD_RS, data);
-  putreg16(reg, LCD_BASE);
-  putreg16(data, LCD_BASE + HX843X_LCD_RS);
-}
-
-/**************************************************************************************
- * Name:  sam_getreg
- *
- * Description:
- *   Read from a HX834x register
- *
- **************************************************************************************/
-
-#ifdef CONFIG_DEBUG_LCD
-static uint16_t sam_getreg(uint16_t reg)
-{
-  uint16_t data;
-  putreg16(reg, LCD_BASE);
-  data = getreg16(LCD_BASE + HX843X_LCD_RS);
-  regdbg("base: %08x RS: %04x data: %04x\n", LCD_BASE, LCD_BASE + HX843X_LCD_RS, data);
-  return data;
-}
-#endif
-
-/**************************************************************************************
- * Name:  sam_setcursor
- *
- * Description:
- *   Set the LCD cursor position.
- *
- **************************************************************************************/
-
-static void sam_setcursor(fb_coord_t row, fb_coord_t col)
-{
-  uint8_t  x1;
-  uint8_t  x2;
-  uint8_t  y1;
-  uint8_t  y2;
-
-  /* Get the upper and lower x and y positions */
-
-  x1  = (uint8_t)col;
-  x2  = (uint8_t)((uint16_t)col >> 8);
-
-  y1  = (uint8_t)row;
-  y2  = (uint8_t)((uint16_t)row >> 8);
-
-  /* Then set the cursor position */
-
-  sam_putreg(HX8347_R02H, x2);        /* column high */
-  sam_putreg(HX8347_R03H, x1);        /* column low */
-  sam_putreg(HX8347_R06H, y2);        /* row high */
-  sam_putreg(HX8347_R07H, y1);        /* row low */
-}
-
-/**************************************************************************************
- * Name:  sam_wrsetup
- *
- * Description:
- *   Set up for a GRAM write operation.
- *
- **************************************************************************************/
-
-static inline void sam_wrsetup(void)
-{
-  putreg16(HX8347_R22H, LCD_BASE);
-}
-
-/**************************************************************************************
- * Name: sam_wrram
- *
- * Description:
- *   Write to the 16-bit GRAM register
- *
- **************************************************************************************/
-
-static inline void sam_wrram(uint16_t color)
-{
-  putreg16(color, LCD_BASE + HX843X_LCD_RS);
-}
-
-/**************************************************************************************
- * Name: sam_rdram
- *
- * Description:
- *   Read from the 16-bit GRAM register
- *
- **************************************************************************************/
-
-static inline uint16_t sam_rdram(void)
-{
-  return getreg16(LCD_BASE + HX843X_LCD_RS);
-}
-
-/**************************************************************************************
- * Name:  sam_lcdon
- *
- * Description:
- *   Turn the LCD on
- *
- **************************************************************************************/
-
-static void sam_lcdon(void)
-{
-  /* Display ON Setting */
-
-  lcdvdbg("ON\n");
-  sam_putreg(HX8347_R90H, 0x7f);      /* SAP=0111 1111 */
-  sam_putreg(HX8347_R26H, 0x04);      /* GON=0 DTE=0 D=01 */
-  up_mdelay(100);
-  sam_putreg(HX8347_R26H, 0x24);      /* GON=1 DTE=0 D=01 */
-  sam_putreg(HX8347_R26H, 0x2c);      /* GON=1 DTE=0 D=11 */
-  up_mdelay(100);
-  sam_putreg(HX8347_R26H, 0x3c);      /* GON=1 DTE=1 D=11 */
-}
-
-/**************************************************************************************
- * Name:  sam_lcdoff
- *
- * Description:
- *   Turn the LCD off
- *
- **************************************************************************************/
-
-static void sam_lcdoff(void)
-{
-  lcdvdbg("OFF\n");
-  sam_putreg(HX8347_R90H, 0x00);      /* SAP=0000 0000 */
-  sam_putreg(HX8347_R26H, 0x00);      /* GON=0 DTE=0 D=00 */
-}
-
-/**************************************************************************************
- * Name:  sam_dumpreg
- *
- * Description:
- *   Dump a range of LCD registers.
- *
- **************************************************************************************/
-
-#if 0 /* CONFIG_DEBUG_LCD */
-static void sam_dumpreg(uint8_t startreg, uint8_t endreg)
-{
-  uint16_t value;
-  uint8_t  addr;
-
-  for (addr = startreg; addr <= endreg; addr++)
-    {
-      value = sam_getreg(addr);
-      lcddbg(" %02x: %04x\n", addr, value);
-    }
-}
-#endif
-
-/**************************************************************************************
- * Name:  sam_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 sam_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer,
-                      size_t npixels)
-{
-  uint16_t *run = (uint16_t*)buffer;
-  unsigned 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);
-
-#ifdef CONFIG_LCD_PORTRAIT
-  /* Set up to write the run. */
-
-  sam_setcursor(row, col);
-  sam_wrsetup();
-
-  /* Write the run to GRAM. */
-
-  for (i = 0; i < npixels; i++)
-    {
-      /* Write the pixel pixel to GRAM */
-
-      sam_wrram(*run++);
-    }
-#else
-  /* Write the run to GRAM.  Because rows and colums are swapped, we need to reset
-   * the cursor position for every pixel.  We could do this much faster if we
-   * adapted to the strange device aspect ratio.
-   */
-
-  col = 319-col;
-  for (i = 0; i < npixels; i++)
-    {
-      /* Set up to write the next pixel. Swapping x and y orientations so that the image
-       * comes out with the 320x240 aspect ratio (not the native 240x320).  That is:
-       *
-       *   row: 0-239 maps to x: 0-239
-       *   col: 0-319 maps to y: 319-0
-       */
-
-      sam_setcursor(col--, row);
-      sam_wrsetup();
-
-      /* Write the pixel pixel to GRAM */
-
-      sam_wrram(*run++);
-    }
-#endif
-  return OK;
-}
-
-/**************************************************************************************
- * Name:  sam_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 sam_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer,
-                      size_t npixels)
-{
-  uint16_t *run = (uint16_t*)buffer;
-  unsigned 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);
-
-#ifdef CONFIG_LCD_PORTRAIT
-  /* Set up to read the run */
-
-  sam_setcursor(row, col);
-
-  /* Read the run from GRAM. */
-
-  for (i = 0; i < npixels; i++)
-    {
-      /* Read the next pixel */
-
-      *run++ = sam_rdram();
-    }
-#else
-  /* Read the run from GRAM  Because rows and colums are swapped, we need to reset
-   * the cursor position for every pixel.  We could do this much faster if we
-   * adapted to the strange device aspect ratio.
-   */
-
-  col = 319 - col;
-  for (i = 0; i < npixels; i++)
-    {
-      /* Read the next pixel.. Swapping x and y orientations so that the image
-       * comes out with the 320x240 aspect ratio (not the native 240x320).  That is:
-       *
-       *   row: 0-239 maps to x: 0-239
-       *   col: 0-319 maps to y: 319-0
-       */
-
-      sam_setcursor(col--, row);
-      *run++ = sam_rdram();
-    }
-#endif
-  return OK;
-}
-
-/**************************************************************************************
- * Name:  sam_getvideoinfo
- *
- * Description:
- *   Get information about the LCD video controller configuration.
- *
- **************************************************************************************/
-
-static int sam_getvideoinfo(FAR struct lcd_dev_s *dev,
-                            FAR struct fb_videoinfo_s *vinfo)
-{
-  DEBUGASSERT(dev && vinfo);
-  lcdvdbg("fmt: %d xres: %d yres: %d nplanes: %d\n",
-          g_videoinfo.fmt, g_videoinfo.xres, g_videoinfo.yres, g_videoinfo.nplanes);
-  memcpy(vinfo, &g_videoinfo, sizeof(struct fb_videoinfo_s));
-  return OK;
-}
-
-/**************************************************************************************
- * Name:  sam_getplaneinfo
- *
- * Description:
- *   Get information about the configuration of each LCD color plane.
- *
- **************************************************************************************/
-
-static int sam_getplaneinfo(FAR struct lcd_dev_s *dev, unsigned int planeno,
-                            FAR struct lcd_planeinfo_s *pinfo)
-{
-  DEBUGASSERT(dev && pinfo && planeno == 0);
-  lcdvdbg("planeno: %d bpp: %d\n", planeno, g_planeinfo.bpp);
-  memcpy(pinfo, &g_planeinfo, sizeof(struct lcd_planeinfo_s));
-  return OK;
-}
-
-/**************************************************************************************
- * Name:  sam_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 sam_getpower(struct lcd_dev_s *dev)
-{
-  struct sam_dev_s *priv = (struct sam_dev_s *)dev;
-  DEBUGASSERT(dev);
-  lcdvdbg("power: %d\n", priv->power);
-  return priv->power;
-}
-
-/**************************************************************************************
- * Name:  sam_setpower
- *
- * Description:
- *   Enable/disable LCD panel power (0: full off - CONFIG_LCD_MAXPOWERL: full on). On
- *   backlit LCDs, this setting may correspond to the backlight setting.
- *
- *   LCD backlight is made of 4 white chip LEDs in parallel, driven by an AAT3194 charge
- *   pump, MN4. The AAT3194 is controlled by the SAM3U4E through a single line. Simple
- *   Serial Control (S2Cwire) interface, which permits to enable, disable, and set the
- *   LED drive current (LED brightness control) from a 32-level logarithmic scale. Four
- *   resistors R93/R94/R95/R96 are implemented for optional current limitation.
- *
- **************************************************************************************/
-
-static int sam_setpower(struct lcd_dev_s *dev, int power)
-{
-  struct sam_dev_s *priv = (struct sam_dev_s *)dev;
-  unsigned int i;
-
-  lcdvdbg("power: %d\n", power);
-  DEBUGASSERT(power <= CONFIG_LCD_MAXPOWER);
-
-  /* Switch off backlight */
-
-  sam_gpiowrite(GPIO_LCD_BKL, false);
-
-  /* For for at least 500uS to drain the charge pump */
-
-  up_udelay(500);
-
-  /* Set new backlight level by pumping "level" times */
-
-  for (i = 0; i < power; i++)
-    {
-      sam_gpiowrite(GPIO_LCD_BKL, false);
-      sam_gpiowrite(GPIO_LCD_BKL, false);
-      sam_gpiowrite(GPIO_LCD_BKL, false);
-      sam_gpiowrite(GPIO_LCD_BKL, true);
-      sam_gpiowrite(GPIO_LCD_BKL, true);
-      sam_gpiowrite(GPIO_LCD_BKL, true);
-    }
-
-  /* This delay seems to be required... perhaps because of the big current jump? */
-
-  if (power != LCD_FULL_OFF)
-    {
-      up_mdelay(100);
-    }
-
-  priv->power = power;
-  return OK;
-}
-
-/**************************************************************************************
- * Name:  sam_getcontrast
- *
- * Description:
- *   Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST).
- *
- **************************************************************************************/
-
-static int sam_getcontrast(struct lcd_dev_s *dev)
-{
-  lcdvdbg("Not implemented\n");
-  return -ENOSYS;
-}
-
-/**************************************************************************************
- * Name:  sam_getcontrast
- *
- * Description:
- *   Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST).
- *
- **************************************************************************************/
-
-static int sam_setcontrast(struct lcd_dev_s *dev, unsigned int contrast)
-{
-  lcdvdbg("contrast: %d\n", contrast);
-  return -ENOSYS;
-}
-
-/**************************************************************************************
- * Public Functions
- **************************************************************************************/
-
-/**************************************************************************************
- * Name:  up_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).
- *
- **************************************************************************************/
-
-int up_lcdinitialize(void)
-{
-#ifdef CONFIG_DEBUG_LCD
-  uint16_t hxregval;
-#endif
-  uint32_t regval;
-  unsigned int i;
-
-  lcdvdbg("Initializing\n");
-
-  /* Enable LCD EXTCS2 pins */
-
-  sam_configgpio(GPIO_LCD_NCS2);
-  sam_configgpio(GPIO_LCD_RS);
-  sam_configgpio(GPIO_LCD_NWE);
-  sam_configgpio(GPIO_LCD_NRD);
-
-  sam_configgpio(GPIO_LCD_D0);
-  sam_configgpio(GPIO_LCD_D1);
-  sam_configgpio(GPIO_LCD_D2);
-  sam_configgpio(GPIO_LCD_D3);
-  sam_configgpio(GPIO_LCD_D4);
-  sam_configgpio(GPIO_LCD_D5);
-  sam_configgpio(GPIO_LCD_D6);
-  sam_configgpio(GPIO_LCD_D7);
-  sam_configgpio(GPIO_LCD_D8);
-  sam_configgpio(GPIO_LCD_D9);
-  sam_configgpio(GPIO_LCD_D10);
-  sam_configgpio(GPIO_LCD_D11);
-  sam_configgpio(GPIO_LCD_D12);
-  sam_configgpio(GPIO_LCD_D13);
-  sam_configgpio(GPIO_LCD_D14);
-  sam_configgpio(GPIO_LCD_D15);
-
-#ifdef CONFIG_LCD_REGDEBUG
-  sam_dumpgpio(GPIO_PORT_PIOB, "PORTB");
-  sam_dumpgpio(GPIO_PORT_PIOC, "PORTC");
-#endif
-
-  /* Configure LCD Backlight Pin */
-
-  sam_configgpio(GPIO_LCD_BKL);
-
-  /* Enable SMC peripheral clock */
-
-  putreg32((1 << SAM_PID_SMC), SAM_PMC_PCER);
-  regdbg("PMC PCSR: %08x SMC: %08x\n", getreg32(SAM_PMC_PCSR), (1 << SAM_PID_SMC));
-
-  /* Configure SMC CS2 */
-
-  regval = (4 << SMCCS_SETUP_NWESETUP_SHIFT) | (2 << SMCCS_SETUP_NCSWRSETUP_SHIFT) |
-           (4 << SMCCS_SETUP_NRDSETUP_SHIFT) | (2 << SMCCS_SETUP_NCSRDSETUP_SHIFT);
-  putreg32(regval, SAM_SMCCS_SETUP(2));
-
-  regval = (5 << SMCCS_PULSE_NWEPULSE_SHIFT) | (18 << SMCCS_PULSE_NCSWRPULSE_SHIFT) |
-           (5 << SMCCS_PULSE_NRDPULSE_SHIFT)  | (18 << SMCCS_PULSE_NCSRDPULSE_SHIFT);
-  putreg32(regval, SAM_SMCCS_PULSE(2));
-
-  regval = (22 << SMCCS_CYCLE_NWECYCLE_SHIFT) | (22 << SMCCS_CYCLE_NRDCYCLE_SHIFT);
-  putreg32(regval, SAM_SMCCS_CYCLE(2));
-
-  regval  = getreg32(SAM_SMCCS_MODE(2));
-  regval &= ~(SMCCS_MODE_DBW_MASK | SMCCS_MODE_PMEN);
-  regval |= (SMCCS_MODE_READMODE)  | (SMCCS_MODE_WRITEMODE) | (SMCCS_MODE_DBW_16BITS);
-  putreg32(regval, SAM_SMCCS_MODE(2));
-
-  regdbg("SMC SETUP[%08x]: %08x PULSE[%08x]: %08x\n",
-         SAM_SMCCS_SETUP(2), getreg32(SAM_SMCCS_SETUP(2)),
-         SAM_SMCCS_PULSE(2), getreg32(SAM_SMCCS_PULSE(2)));
-  regdbg("    CYCLE[%08x]: %08x MODE[%08x]:  %08x\n",
-         SAM_SMCCS_CYCLE(2), getreg32(SAM_SMCCS_CYCLE(2)),
-         SAM_SMCCS_MODE(2),  getreg32(SAM_SMCCS_MODE(2)));
-
-  /* Check HX8347 Chip ID */
-
-#ifdef CONFIG_DEBUG_LCD
-  hxregval = sam_getreg(HX8347_R67H);
-  lcdvdbg("Chip ID: %04x\n", hxregval);
-  if (hxregval != HX8347_CHIPID)
-    {
-      lcddbg("Bad chip ID: %04x Expected: %04x\n", hxregval, HX8347_CHIPID);
-      return -ENODEV;
-    }
-#endif
-
-  /* Initialize LCD controller (HX8347) -- Magic code from Atmel LCD example */
-
-  /* Start internal OSC */
-
-  sam_putreg(HX8347_R19H, 0x49);      /* OSCADJ=10 0000 OSD_EN=1 60Hz */
-  sam_putreg(HX8347_R93H, 0x0C);      /* RADJ=1100 */
-
-  /* Power on flow */
-
-  sam_putreg(HX8347_R44H, 0x4D);      /* VCM=100 1101 */
-  sam_putreg(HX8347_R45H, 0x11);      /* VDV=1 0001 */
-  sam_putreg(HX8347_R20H, 0x40);      /* BT=0100 */
-  sam_putreg(HX8347_R1DH, 0x07);      /* VC1=111 */
-  sam_putreg(HX8347_R1EH, 0x00);      /* VC3=000 */
-  sam_putreg(HX8347_R1FH, 0x04);      /* VRH=0100 */
-  sam_putreg(HX8347_R1CH, 0x04);      /* AP=100 */
-  sam_putreg(HX8347_R1BH, 0x10);      /* GASENB=0 PON=1 DK=0 XDK=0 DDVDH_TRI=0 STB=0 */
-  up_mdelay(50);
-  sam_putreg(HX8347_R43H, 0x80);      /* Set VCOMG=1 */
-  up_mdelay(50);
-
-  /* Gamma for CMO 2.8 */
-
-  sam_putreg(HX8347_R46H, 0x95);
-  sam_putreg(HX8347_R47H, 0x51);
-  sam_putreg(HX8347_R48H, 0x00);
-  sam_putreg(HX8347_R49H, 0x36);
-  sam_putreg(HX8347_R4AH, 0x11);
-  sam_putreg(HX8347_R4BH, 0x66);
-  sam_putreg(HX8347_R4CH, 0x14);
-  sam_putreg(HX8347_R4DH, 0x77);
-  sam_putreg(HX8347_R4EH, 0x13);
-  sam_putreg(HX8347_R4FH, 0x4c);
-  sam_putreg(HX8347_R50H, 0x46);
-  sam_putreg(HX8347_R51H, 0x46);
-
-  /* 240x320 window setting */
-
-  sam_putreg(HX8347_R02H, 0x00);      /* Column address start2 */
-  sam_putreg(HX8347_R03H, 0x00);      /* Column address start1 */
-  sam_putreg(HX8347_R04H, 0x00);      /* Column address end2 */
-  sam_putreg(HX8347_R05H, 0xef);      /* Column address end1 */
-  sam_putreg(HX8347_R06H, 0x00);      /* Row address start2 */
-  sam_putreg(HX8347_R07H, 0x00);      /* Row address start1 */
-  sam_putreg(HX8347_R08H, 0x01);      /* Row address end2 */
-  sam_putreg(HX8347_R09H, 0x3f);      /* Row address end1 */
-
-  /* Display Setting */
-
-  sam_putreg(HX8347_R01H, 0x06);      /* IDMON=0 INVON=1 NORON=1 PTLON=0 */
-  sam_putreg(HX8347_R16H, 0xc8);      /* MY=1 MX=1 MV=0 BGR=1 */
-  sam_putreg(HX8347_R23H, 0x95);      /* N_DC=1001 0101 */
-  sam_putreg(HX8347_R24H, 0x95);      /* P_DC=1001 0101 */
-  sam_putreg(HX8347_R25H, 0xff);      /* I_DC=1111 1111 */
-  sam_putreg(HX8347_R27H, 0x06);      /* N_BP=0000 0110 */
-  sam_putreg(HX8347_R28H, 0x06);      /* N_FP=0000 0110 */
-  sam_putreg(HX8347_R29H, 0x06);      /* P_BP=0000 0110 */
-  sam_putreg(HX8347_R2AH, 0x06);      /* P_FP=0000 0110 */
-  sam_putreg(HX8347_R2CH, 0x06);      /* I_BP=0000 0110 */
-  sam_putreg(HX8347_R2DH, 0x06);      /* I_FP=0000 0110 */
-  sam_putreg(HX8347_R3AH, 0x01);      /* N_RTN=0000 N_NW=001 */
-  sam_putreg(HX8347_R3BH, 0x01);      /* P_RTN=0000 P_NW=001 */
-  sam_putreg(HX8347_R3CH, 0xf0);      /* I_RTN=1111 I_NW=000 */
-  sam_putreg(HX8347_R3DH, 0x00);      /* DIV=00 */
-  sam_putreg(HX8347_R3EH, 0x38);      /* SON=38h */
-  sam_putreg(HX8347_R40H, 0x0f);      /* GDON=0Fh */
-  sam_putreg(HX8347_R41H, 0xf0);      /* GDOF=F0h */
-
-  /* Set LCD backlight to FULL off */
-
-  sam_setpower(&g_lcddev_s.dev, LCD_FULL_OFF);
-
-  /* Fill the display memory with the color BLACK */
-
-  sam_setcursor(0, 0);
-  sam_wrsetup();
-  for (i = 0; i < (SAM4EEK_XRES * SAM4EEK_YRES); i++)
-    {
-      sam_wrram(RGB16_BLACK);
-    }
-
-  /* Turn the LCD on (but with the backlight off) */
-
-  sam_lcdon();
-  return OK;
-}
-
-/**************************************************************************************
- * Name:  up_lcdgetdev
- *
- * Description:
- *   Return a a reference to the LCD object for the specified LCD.  This allows
- *   support for multiple LCD devices.
- *
- **************************************************************************************/
-
-FAR struct lcd_dev_s *up_lcdgetdev(int lcddev)
-{
-  lcdvdbg("lcddev: %d\n", lcddev);
-  return lcddev == 0 ? &g_lcddev_s.dev : NULL;
-}
-
-/**************************************************************************************
- * Name:  up_lcduninitialize
- *
- * Description:
- *   Unitialize the framebuffer support.
- *
- **************************************************************************************/
-
-void up_lcduninitialize(void)
-{
-  /* Turn the LCD off */
-
-  sam_lcdoff();
-
-  /* Set LCD backlight to FULL off */
-
-  sam_setpower(&g_lcddev_s.dev, LCD_FULL_OFF);
-
-  /* Disable SMC peripheral clock */
-
-  putreg32((1 << SAM_PID_SMC), SAM_PMC_PCDR);
-}
-
-