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/****************************************************************************
* arch/arm/src/sama5/sam_adc.h
*
* Copyright (C) 2013 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.
*
****************************************************************************/
#ifndef __ARCH_ARM_SRC_SAMA5_SAM_ADC_H
#define __ARCH_ARM_SRC_SAMA5_SAM_ADC_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include "chip/sam_adc.h"
#ifdef CONFIG_SAMA5_ADC
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
#ifndef CONFIG_SCHED_WORKQUEUE
# error Work queue support is required (CONFIG_SCHED_WORKQUEUE)
#endif
#ifndef CONFIG_DEBUG
# undef CONFIG_SAMA5_ADC_REGDEBUG
#endif
/* ADC channels 0-3 or 0-4 are not available to the ADC driver if touchscreen
* support is enabled.
*/
#ifdef CONFIG_SAMA5_TOUCHSCREEN
# undef CONFIG_SAMA5_ADC_CHAN0
# undef CONFIG_SAMA5_ADC_CHAN1
# undef CONFIG_SAMA5_ADC_CHAN2
# undef CONFIG_SAMA5_ADC_CHAN3
# ifdef CONFIG_SAMA5_TOUCHSCREEN_5WIRE
# undef CONFIG_SAMA5_ADC_CHAN4
# endif
#endif
/* Do we have any ADC channels enabled? If not, then the ADC driver may
* still need to exist to support the touchscreen.
*/
#undef SAMA5_ADC_HAVE_CHANNELS
#if defined(CONFIG_SAMA5_ADC_CHAN0) || defined(CONFIG_SAMA5_ADC_CHAN1) || \
defined(CONFIG_SAMA5_ADC_CHAN2) || defined(CONFIG_SAMA5_ADC_CHAN3) || \
defined(CONFIG_SAMA5_ADC_CHAN4) || defined(CONFIG_SAMA5_ADC_CHAN5) || \
defined(CONFIG_SAMA5_ADC_CHAN6) || defined(CONFIG_SAMA5_ADC_CHAN7) || \
defined(CONFIG_SAMA5_ADC_CHAN8) || defined(CONFIG_SAMA5_ADC_CHAN9) || \
defined(CONFIG_SAMA5_ADC_CHAN10) || defined(CONFIG_SAMA5_ADC_CHAN11)
# define SAMA5_ADC_HAVE_CHANNELS 1
#elif !defined(CONFIG_SAMA5_TOUCHSCREEN)
# error "No ADC channels nor touchscreen"
#endif
/****************************************************************************
* Public Types
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: sam_adcinitialize
*
* Description:
* Initialize the ADC
*
* Returned Value:
* Valid can device structure reference on succcess; a NULL on failure
*
****************************************************************************/
struct sam_adc_s;
FAR struct sam_adc_s *sam_adcinitialize(void);
/****************************************************************************
* Interfaces exported from the ADC to the touchscreen driver
****************************************************************************/
/****************************************************************************
* Name: sam_adc_lock
*
* Description:
* Get exclusive access to the ADC interface
*
****************************************************************************/
void sam_adc_lock(FAR struct sam_adc_s *priv);
/****************************************************************************
* Name: sam_adc_unlock
*
* Description:
* Relinquish the lock on the ADC interface
*
****************************************************************************/
void sam_adc_unlock(FAR struct sam_adc_s *priv);
/****************************************************************************
* Name: sam_adc_getreg
*
* Description:
* Read any 32-bit register using an absolute address.
*
****************************************************************************/
#ifdef CONFIG_SAMA5_ADC_REGDEBUG
uint32_t sam_adc_getreg(FAR struct sam_adc_s *priv, uintptr_t address);
#else
# define sam_adc_getreg(handle,addr) getreg32(addr)
#endif
/****************************************************************************
* Name: sam_adc_putreg
*
* Description:
* Write to any 32-bit register using an absolute address.
*
****************************************************************************/
#ifdef CONFIG_SAMA5_ADC_REGDEBUG
void sam_adc_putreg(FAR struct sam_adc_s *priv, uintptr_t address,
uint32_t regval);
#else
# define sam_adc_putreg(handle,addr,val) putreg32(val,addr)
#endif
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* CONFIG_SAMA5_ADC */
#endif /* __ARCH_ARM_SRC_SAMA5_SAM_ADC_H */
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