text: /****************************************************************************
   * configs/stm32l4r9ai-disco/src/stm32_appinit.c
   *
   *   Copyright (C) 2018 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.
   *
   ****************************************************************************/
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <tinyara/config.h>
  
  #include <sys/types.h>
  #include <sys/mount.h>
  #include <stdio.h>
  #include <syslog.h>
  #include <errno.h>
  #include <debug.h>
  #include <string.h>
  #include <stdlib.h>
  
  #include <tinyara/arch.h>
  #include <tinyara/board.h>
  
  #include <stm32l4.h>
  #include <stm32l4_uart.h>
  #include <stm32l4_uid.h>
  
  #include <arch/board/board.h>
  #include <arch/board/boardctl.h>
  
  #include <tinyara/drivers/drivers.h>
  #include <tinyara/drivers/ramdisk.h>
  #include <tinyara/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 including
   * stm32l4r9ai-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 initalization logic and the
   *         matching application logic.  The value cold 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_LIB_BOARDCTL
  int board_app_initialize(uintptr_t arg)
  {
  #ifdef HAVE_RTC_DRIVER
    FAR struct rtc_lowerhalf_s *rtclower;
  #endif
    int ret;
  
    (void)ret;
  
  #ifdef HAVE_PROC
    /* mount the proc filesystem */
  
    syslog(LOG_INFO, "Mounting procfs to /proc\n");
  
    ret = mount(NULL, CONFIG_NSH_PROC_MOUNTPOINT, "procfs", 0, NULL);
    if (ret < 0)
      {
        syslog(LOG_ERR,
               "ERROR: Failed to mount the PROC filesystem: %d (%d)\n",
               ret, errno);
        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");
  
    (void)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");
  
    (void)stm32l4_dac_setup();
  #endif
  
    return OK;
  }
  #endif /* CONFIG_LIB_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
  