/****************************************************************************
 * configs/sama5d2-xult/src/sam_autoleds.c
 *
 *   Copyright (C) 2015 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.
 *
 ****************************************************************************/
/* There is an RGB LED on board the SAMA5D2-XULT.  The RED component is
 * driven by the SDHC_CD pin (PA13) and so will not be used.  The LEDs are
 * provided VDD_LED and so bringing the LED low will will illuminated the
 * LED.
 *
 *   ------------------------------ ------------------- ---------------------
 *   SAMA5D2 PIO                    SIGNAL              USAGE
 *   ------------------------------ ------------------- ---------------------
 *   PA13                           SDHC_CD_PA13        Red LED
 *   PB5                            LED_GREEN_PB5       Green LED
 *   PB0                            LED_BLUE_PB0        Blue LED
 *   ------------------------------ ------------------- ---------------------
 *
 * These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is
 * defined.  In that case, the usage by the board port is defined in
 * include/board.h and src/sam_leds.c. The LEDs are used to encode OS-related
 * events as follows.  Note that only the GREEN LED is used in this case
 *
 *   SYMBOL              Meaning                 Green LED
 *   ------------------- ----------------------- ---------
 *   LED_STARTED         NuttX has been started  OFF
 *   LED_HEAPALLOCATE    Heap has been allocated OFF
 *   LED_IRQSENABLED     Interrupts enabled      OFF
 *   LED_STACKCREATED    Idle stack created      ON
 *   LED_INIRQ           In an interrupt         N/C
 *   LED_SIGNAL          In a signal handler     N/C
 *   LED_ASSERTION       An assertion failed     N/C
 *   LED_PANIC           The system has crashed  FLASH
 *
 * Thus if the Green LED is statically on, NuttX has successfully  booted
 * and is, apparently, running normally.  If LED is flashing at
 * approximately 2Hz, then a fatal error has been detected and the system
 * has halted.
 */

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <stdint.h>
#include <stdbool.h>
#include <debug.h>

#include <nuttx/board.h>
#include <arch/board/board.h>

#include "sam_pio.h"
#include "sama5d2-xult.h"

#ifdef CONFIG_ARCH_LEDS

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/

/* CONFIG_DEBUG_LEDS enables debug output from this file (needs CONFIG_DEBUG
 * with CONFIG_DEBUG_VERBOSE too)
 */

#ifdef CONFIG_DEBUG_LEDS
#  define leddbg  lldbg
#  define ledvdbg llvdbg
#else
#  define leddbg(x...)
#  define ledvdbg(x...)
#endif

/****************************************************************************
 * Private Data
 ****************************************************************************/

/****************************************************************************
 * Private Functions
 ****************************************************************************/

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: board_autoled_initialize
 ****************************************************************************/

void board_autoled_initialize(void)
{
  /* Configure LED PIOs for output */

  sam_configpio(PIO_LED_GREEN);
}

/****************************************************************************
 * Name: board_autoled_on
 ****************************************************************************/

void board_autoled_on(int led)
{
  switch (led)
    {
      default:
      case 0: /* LED_STARTED, LED_HEAPALLOCATE, LED_IRQSENABLED */
        break; /* Leave Green LED off */

      case 1:   /* LED_STACKCREATED */
      case 3:   /* LED_PANIC */
        {
          /* Green LED is ON (Low illuminates) */

          sam_piowrite(PIO_LED_GREEN, false);
        }
        break;

      case 2:  /* LED_INIRQ, LED_SIGNAL, LED_ASSERTION */
        break; /* No change */
    }
}

/****************************************************************************
 * Name: board_autoled_off
 ****************************************************************************/

void board_autoled_off(int led)
{
  switch (led)
    {
      default:
      case 0:  /* LED_STARTED, LED_HEAPALLOCATE, LED_IRQSENABLED,  */
      case 1:  /* LED_STACKCREATED */
        break; /* Will not happen */

      case 2:  /* LED_INIRQ, LED_SIGNAL, LED_ASSERTION */
        break; /* No change */

      case 3:  /* LED_PANIC */
        {
          /* Power LED is OFF (Low illuminates) */

          sam_piowrite(PIO_LED_GREEN, true);
        }
        break;
    }
}

#endif /* CONFIG_ARCH_LEDS */
