text: /****************************************************************************
   * boards/arm/stm32l4/stm32l4r9ai-disco/src/stm32_appinit.c
   *
   * 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.
   *
   ****************************************************************************/
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  
  #include <sys/types.h>
  #include <stdio.h>
  #include <errno.h>
  #include <debug.h>
  #include <string.h>
  #include <stdlib.h>
  
  #include <nuttx/arch.h>
  #include <nuttx/board.h>
  #include <nuttx/fs/fs.h>
  
  #include <stm32l4.h>
  #include <stm32l4_uart.h>
  #include <stm32l4_uid.h>
  
  #include <arch/board/board.h>
  #include <arch/board/boardctl.h>
  
  #include <nuttx/drivers/drivers.h>
  #include <nuttx/drivers/ramdisk.h>
  #include <nuttx/i2c/i2c_master.h>
  
  #include "stm32l4r9ai-disco.h"
  
  /* Conditional logic in stm32l4r9ai-disco.h will determine if certain
   * features are supported.  Tests for these features need to be made
   * after includingstm32l4r9ai-disco.
   */
  
  #ifdef HAVE_RTC_DRIVER
  #  include <nuttx/timers/rtc.h>
  #  include "stm32l4_rtc.h"
  #endif
  
  /****************************************************************************
   * Private Data
   ****************************************************************************/
  
  #ifdef CONFIG_I2C
  #  ifdef CONFIG_STM32L4_I2C1
  static struct i2c_master_s *g_i2c1;
  #  endif
  #  ifdef CONFIG_STM32L4_I2C3
  static struct i2c_master_s *g_i2c3;
  #  endif
  #endif
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name: board_app_initialize
   *
   * Description:
   *   Perform application specific initialization.  This function is never
   *   called directly from application code, but only indirectly via the
   *   (non-standard) boardctl() interface using the command BOARDIOC_INIT.
   *
   * Input Parameters:
   *   arg - The boardctl() argument is passed to the board_app_initialize()
   *         implementation without modification.  The argument has no
   *         meaning to NuttX; the meaning of the argument is a contract
   *         between the board-specific initialization logic and the
   *         matching application logic.  The value could be such things as a
   *         mode enumeration value, a set of DIP switch switch settings, a
   *         pointer to configuration data read from a file or serial FLASH,
   *         or whatever you would like to do with it.  Every implementation
   *         should accept zero/NULL as a default configuration.
   *
   * Returned Value:
   *   Zero (OK) is returned on success; a negated errno value is returned on
   *   any failure to indicate the nature of the failure.
   *
   ****************************************************************************/
  
  #ifdef CONFIG_BOARDCTL
  int board_app_initialize(uintptr_t arg)
  {
  #ifdef HAVE_RTC_DRIVER
    FAR struct rtc_lowerhalf_s *rtclower;
  #endif
    int ret = OK;
  
  #ifdef HAVE_PROC
    /* mount the proc filesystem */
  
    syslog(LOG_INFO, "Mounting procfs to /proc\n");
  
    ret = nx_mount(NULL, CONFIG_NSH_PROC_MOUNTPOINT, "procfs", 0, NULL);
    if (ret < 0)
      {
        syslog(LOG_ERR,
               "ERROR: Failed to mount the PROC filesystem: %d\n", ret);
        return ret;
      }
  #endif
  
  #ifdef HAVE_RTC_DRIVER
    /* Instantiate the STM32 lower-half RTC driver */
  
    rtclower = stm32l4_rtc_lowerhalf();
    if (!rtclower)
      {
        serr("ERROR: Failed to instantiate the RTC lower-half driver\n");
        return -ENOMEM;
      }
    else
      {
        /* Bind the lower half driver and register the combined RTC driver
         * as /dev/rtc0
         */
  
        ret = rtc_initialize(0, rtclower);
        if (ret < 0)
          {
            serr("ERROR: Failed to bind/register the RTC driver: %d\n", ret);
            return ret;
          }
      }
  #endif
  
  #ifdef CONFIG_I2C
    i2cinfo("Initializing I2C buses\n");
  #ifdef CONFIG_STM32L4_I2C1
    g_i2c1 = stm32l4_i2cbus_initialize(1);
  #ifdef CONFIG_I2C_DRIVER
    i2c_register(g_i2c1, 1);
  #endif
  #endif
  
  #ifdef CONFIG_STM32L4_I2C3
    g_i2c3 = stm32l4_i2cbus_initialize(3);
  #ifdef CONFIG_I2C_DRIVER
    i2c_register(g_i2c3, 3);
  #endif
  #endif
  #endif /* CONFIG_I2C */
  
  #ifdef HAVE_USBHOST
    /* Initialize USB host operation.  stm32l4_usbhost_initialize() starts a
     * thread that will monitor for USB connection and disconnection events.
     */
  
    ret = stm32l4_usbhost_initialize();
    if (ret != OK)
      {
        udbg("ERROR: Failed to initialize USB host: %d\n", ret);
        return ret;
      }
  #endif
  
  #ifdef HAVE_USBMONITOR
    /* Start the USB Monitor */
  
    ret = usbmonitor_start(0, NULL);
    if (ret != OK)
      {
        udbg("ERROR: Failed to start USB monitor: %d\n", ret);
        return ret;
      }
  #endif
  
  #ifdef CONFIG_ADC
    ainfo("Initializing ADC\n");
  
    stm32l4_adc_setup();
  #ifdef CONFIG_STM32L4_DFSDM
    /* Initialize DFSDM and register its filters as additional ADC devices. */
  
    ret = stm32_dfsdm_setup();
    if (ret < 0)
      {
        aerr("ERROR: Failed to start DFSDM: %d\n", ret);
      }
  #endif
  #endif /* CONFIG_ADC */
  
  #ifdef CONFIG_DAC
    ainfo("Initializing DAC\n");
  
    stm32l4_dac_setup();
  #endif
  
    return ret;
  }
  #endif /* CONFIG_BOARDCTL */
  
  #ifdef CONFIG_BOARDCTL_IOCTL
  int board_ioctl(unsigned int cmd, uintptr_t arg)
  {
    switch (cmd)
      {
        default:
          return -EINVAL;
      }
  
      return OK;
  }
  #endif
  
  #if defined(CONFIG_BOARDCTL_UNIQUEID)
  int board_uniqueid(uint8_t *uniqueid)
  {
    if (uniqueid == 0)
      {
        return -EINVAL;
      }
  
    stm32l4_get_uniqueid(uniqueid);
    return OK;
  }
  #endif
  