/****************************************************************************
 * arch/arm/src/stm32/stm32_adc.c
 *
 *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
 *   Author: Li Zhuoyi <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.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/
 
#include <nuttx/config.h>

#include <stdio.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <semaphore.h>
#include <errno.h>
#include <debug.h>

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

#include "up_internal.h"
#include "up_arch.h"

#include "chip.h"
#include "stm32_internal.h"
#include "stm32_adc.h"

#ifdef CONFIG_ADC

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/
/* Configuration ************************************************************/
/* Up to 3 ADC interfaces are supported */

#if STM32_NADC < 3
#  undef CONFIG_STM32_ADC3
#endif

#if STM32_NADC < 2
#  undef CONFIG_STM32_ADC2
#endif

#if STM32_NADC < 1
#  undef CONFIG_STM32_ADC1
#endif

#if defined(CONFIG_STM32_ADC1) || defined(CONFIG_STM32_ADC2) || defined(CONFIG_STM32_ADC3)

/****************************************************************************
 * Private Types
 ****************************************************************************/

struct stm32_dev_s
{
  int irq;
# warning "Missing logic"
};

/****************************************************************************
 * Private Function Prototypes
 ****************************************************************************/
/* ADC Interrupt Handler */

static int  adc_interrupt(int irq, void *context);

/* ADC Driver Methods */

static void adc_reset(FAR struct adc_dev_s *dev);
static int  adc_setup(FAR struct adc_dev_s *dev);
static void adc_shutdown(FAR struct adc_dev_s *dev);
static void adc_rxint(FAR struct adc_dev_s *dev, bool enable);
static int  adc_ioctl(FAR struct adc_dev_s *dev, int cmd, unsigned long arg);
static int  adc_interrupt(int irq, void *context);

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

static const struct adc_ops_s g_adcops =
{
  .ao_reset    = adc_reset,
  .ao_setup    = adc_setup,
  .ao_shutdown = adc_shutdown,
  .ao_rxint    = adc_rxint,
  .ao_ioctl    = adc_ioctl,
};

#ifdef CONFIG_STM32_ADC1
static struct stm32_dev_s g_adcpriv1 =
{
#ifdef CONFIG_STM32_STM32F10XX
  .irq         = STM32_IRQ_ADC12;
#else
  .irq         = STM32_IRQ_ADC;
#endif
# warning "Missing logic"
};

static struct adc_dev_s g_adcdev1 =
{
  .ad_ops = &g_adcops,
  .ad_priv= &g_adcpriv1
};
#endif

#ifdef CONFIG_STM32_ADC2
static struct stm32_dev_s g_adcpriv2 =
{
#ifdef CONFIG_STM32_STM32F10XX
  .irq         = STM32_IRQ_ADC12;
#else
  .irq         = STM32_IRQ_ADC;
#endif
# warning "Missing logic"
};

static struct adc_dev_s g_adcdev2 =
{
  .ad_ops = &g_adcops
  .ad_priv= &g_adcpriv2
};

#endif

#ifdef CONFIG_STM32_ADC3
static struct stm32_dev_s g_adcpriv3 =
{
#ifdef CONFIG_STM32_STM32F10XX
  .irq         = STM32_IRQ_ADC3;
#else
  .irq         = STM32_IRQ_ADC;
#endif
# warning "Missing logic"
};

static struct adc_dev_s g_adcdev3 =
{
  .ad_ops = &g_adcops,
  .ad_priv= &g_adcpriv3
};

#endif

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

/****************************************************************************
 * Name: adc_interrupt
 *
 * Description:
 *   ADC interrupt handler.
 *
 * Input Parameters:
 *
 * Returned Value:
 *
 ****************************************************************************/

static int adc_interrupt(int irq, void *context)
{
  FAR struct stm32_dev_s *priv;
  uint32_t regval;

  /* Determine which ADC caused the interrupt */
# warning "Missing logic"

  /* Handle the ADC interrupt */
# warning "Missing logic"
  return OK;
}

/****************************************************************************
 * Name: adc_reset
 *
 * Description:
 *   Reset the ADC device.  Called early to initialize the hardware. This
 *   is called, before adc_setup() and on error conditions.
 *
 * Input Parameters:
 *
 * Returned Value:
 *
 ****************************************************************************/

static void adc_reset(FAR struct adc_dev_s *dev)
{
  FAR struct stm32_dev_s *priv = (FAR struct stm32_dev_s *)dev->ad_priv;
  irqstate_t flags;
  uint32_t regval;

  flags = irqsave();

# warning "Missing logic"

  irqrestore(flags);  
}

/****************************************************************************
 * Name: adc_setup
 *
 * Description:
 *   Configure the ADC. This method is called the first time that the ADC
 *   device is opened.  This will occur when the port is first opened.
 *   This setup includes configuring and attaching ADC interrupts.  Interrupts
 *   are all disabled upon return.
 *
 * Input Parameters:
 *
 * Returned Value:
 *
 ****************************************************************************/

static int adc_setup(FAR struct adc_dev_s *dev)
{
  FAR struct stm32_dev_s *priv = (FAR struct stm32_dev_s *)dev->ad_priv;
  int ret;

  /* Attach the ADC interrupt */

  ret = irq_attach(priv->irq, adc_interrupt);
  if (ret == OK)
    {
      /* Initialize the ADC data structures */
#warning "Missing logic"

      /* Enable the ADC interrupt */

      up_enable_irq(priv->irq);
    }
  return ret;
}

/****************************************************************************
 * Name: adc_shutdown
 *
 * Description:
 *   Disable the ADC.  This method is called when the ADC device is closed.
 *   This method reverses the operation the setup method.
 *
 * Input Parameters:
 *
 * Returned Value:
 *
 ****************************************************************************/

static void adc_shutdown(FAR struct adc_dev_s *dev)
{
  FAR struct stm32_dev_s *priv = (FAR struct stm32_dev_s *)dev->ad_priv;

  /* Disable ADC interrupts and detach the ADC interrupt handler */

  up_disable_irq(priv->irq);
  irq_detach(priv->irq);

  /* Disable and reset the ADC module */
#warning "Missing logic"
}

/****************************************************************************
 * Name: adc_rxint
 *
 * Description:
 *   Call to enable or disable RX interrupts.
 *
 * Input Parameters:
 *
 * Returned Value:
 *
 ****************************************************************************/

static void adc_rxint(FAR struct adc_dev_s *dev, bool enable)
{
  FAR struct stm32_dev_s *priv = (FAR struct stm32_dev_s *)dev->ad_priv;

  if (enable)
    {
#warning "Missing logic"
    }
  else
    {
#warning "Missing logic"
    }
}

/****************************************************************************
 * Name: adc_ioctl
 *
 * Description:
 *   All ioctl calls will be routed through this method.
 *
 * Input Parameters:
 *
 * Returned Value:
 *
 ****************************************************************************/

static int  adc_ioctl(FAR struct adc_dev_s *dev, int cmd, unsigned long arg)
{
  return -ENOTTY;
}

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

/****************************************************************************
 * Name: up_adcinitialize
 *
 * Description:
 *   Initialize the adc
 *
 * Returned Value:
 *   Valid can device structure reference on succcess; a NULL on failure
 *
 ****************************************************************************/

struct adc_dev_s *up_adcinitialize(int intf)
{
#ifdef CONFIG_STM32_ADC1
  if (intf == 1)
    {
      return &g_adcdev1;
    }
  else
#endif
#ifdef CONFIG_STM32_ADC2
  if (intf == 2)
    {
      return &g_adcdev2;
    }
  else
#endif
#ifdef CONFIG_STM32_ADC3
  if (intf == 3)
    {
      return &g_adcdev3;
    }
  else
#endif
    {
      return NULL;
    }
}

#endif /* CONFIG_STM32_ADC || CONFIG_STM32_ADC2 || CONFIG_STM32_ADC3 */
#endif /* CONFIG_ADC */