text: /****************************************************************************
   * arch/arm/src/sama5/sam_tsd.h
   *
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.  The
   * ASF licenses this file to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance with the
   * License.  You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
   * License for the specific language governing permissions and limitations
   * under the License.
   *
   ****************************************************************************/
  
  #ifndef __ARCH_ARM_SRC_SAMA5_SAM_TSD_H
  #define __ARCH_ARM_SRC_SAMA5_SAM_TSD_H
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  #include "hardware/sam_adc.h"
  
  #if defined(CONFIG_SAMA5_ADC) && defined(CONFIG_SAMA5_TSD)
  
  /****************************************************************************
   * Pre-processor Definitions
   ****************************************************************************/
  
  /* Configuration ************************************************************/
  
  #ifdef CONFIG_SAMA_TSD_RXP
  #  define CONFIG_SAMA_TSD_RXP 6
  #endif
  
  /* Touchscreen interrupt event sets
   *
   *   ADC_INT_XRDY           TSD Measure XPOS Ready Interrupt
   *   ADC_INT_YRDY           TSD Measure YPOS Ready Interrupt
   *   ADC_INT_PRDY           TSD Measure Pressure Ready Interrupt
   *   ADC_INT_PEN            Pen Contact Interrupt
   *   ADC_INT_NOPEN          No Pen Contact Interrupt
   *   ADC_SR_PENS            Pen detect Status (Not an interrupt)
   */
  
  #define ADC_TSD_CMNINTS     (ADC_INT_XRDY | ADC_INT_YRDY | ADC_INT_PRDY | ADC_INT_NOPEN)
  #define ADC_TSD_ALLINTS     (ADC_TSD_CMNINTS | ADC_INT_PEN)
  #define ADC_TSD_ALLSTATUS   (ADC_TSD_ALLINTS | ADC_SR_PENS)
  #define ADC_TSD_RELEASEINTS ADC_TSD_CMNINTS
  
  /****************************************************************************
   * Public Types
   ****************************************************************************/
  
  /****************************************************************************
   * Public Data
   ****************************************************************************/
  
  #undef EXTERN
  #if defined(__cplusplus)
  #define EXTERN extern "C"
  extern "C"
  {
  #else
  #define EXTERN extern
  #endif
  
  /****************************************************************************
   * Public Functions Prototypes
   ****************************************************************************/
  
  /****************************************************************************
   * Name: sam_tsd_register
   *
   * Description:
   *   Configure the SAMA5 touchscreen.  This will register the driver as
   *   /dev/inputN where N is the minor device number
   *
   * Input Parameters:
   *   dev   - The ADC device handle received from sam_adc_initialize()
   *   minor - The input device minor number
   *
   * Returned Value:
   *   Zero is returned on success.  Otherwise, a negated errno value is
   *   returned to indicate the nature of the failure.
   *
   ****************************************************************************/
  
  struct sam_adc_s;
  int sam_tsd_register(struct sam_adc_s *adc, int minor);
  
  /****************************************************************************
   * Interfaces exported from the touchscreen to the ADC driver
   ****************************************************************************/
  
  /****************************************************************************
   * Name: sam_tsd_interrupt
   *
   * Description:
   *   Handles ADC interrupts associated with touchscreen channels
   *
   * Input Parameters:
   *   pending - Current set of pending interrupts being handled
   *
   * Returned Value:
   *   None
   *
   ****************************************************************************/
  
  void sam_tsd_interrupt(uint32_t pending);
  
  #undef EXTERN
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* CONFIG_SAMA5_ADC && CONFIG_SAMA5_TSD */
  #endif /* __ARCH_ARM_SRC_SAMA5_SAM_TSD_H */
  