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 /* SPDX-License-Identifier: BSD-2-Clause */
 
 /*
  *
  * Copyright (C) 2024 Kevin Kirspel
  *
  * 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.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
  */
 
 #include <bsp.h>
 #include <bsp/bootcard.h>
 #include <stdio.h>
 #include <rtems.h>
 #include <rtems/libio.h>
 #include <rtems/error.h>
 #include <stdlib.h>
 #include <string.h>
 #include <assert.h>
 #include <bsp/fatal.h>
 #include <bsp/irq.h>
 #include <bsp/niosv.h>
 
 #include <rtems/score/riscv-utility.h>
 
 /* Local Definitaions */
 #define FILE_HEADER_EPCQ_OFFSET                     0x100000
 #define FILE_HEADER_VER_SIZE_VERSION                11
 /* Local Structures */
 typedef struct
 {
   uint32_t offset;
   uint32_t size;
   uint32_t crc;
   char version[FILE_HEADER_VER_SIZE_VERSION];
 }file_header_t;
 /* Local Functions */
 /* Local Variables */
 static char software_version[VERSION_SIZE];
 
 /* system_initialize --
  *     This routine registers the system device
  *
  * PARAMETERS:
  *     major - major led device number
  *     minor - miled led device number (not used)
  *     arg - device initialize argument
  *
  * RETURNS:
  *     RTEMS error code (RTEMS_SUCCESSFUL if device initialized successfuly)
  */
 rtems_device_driver system_initialize (
   rtems_device_major_number major,
   rtems_device_minor_number minor,
   void *arg
 )
 {
   /* Local Variables */
   rtems_status_code status;
   file_header_t fhead;
 
   /*
    * Register the devices
    */
   status = rtems_io_register_name ("/dev/system", major, minor );
   assert( status == RTEMS_SUCCESSFUL );
 
   /* read the file header information */
   epcq_read_buffer(
     FILE_HEADER_EPCQ_OFFSET,
     ( uint8_t * )&fhead,
     sizeof( fhead )
   );
 
   memset( &software_version[0], 0, sizeof( software_version ));
   strncpy( software_version, fhead.version, FILE_HEADER_VER_SIZE_VERSION );
 
   return RTEMS_SUCCESSFUL;
 }
 
 /* system_open --
  *     Open system device.
  *
  * PARAMETERS:
  *     major - major device number for led devices
  *     minor - miled device number for led
  *     arg - device opening argument
  *
  * RETURNS:
  *     RTEMS error code
  */
 rtems_device_driver system_open (
   rtems_device_major_number major,
   rtems_device_minor_number minor,
   void *arg
 )
 {
   return RTEMS_SUCCESSFUL;
 }
 
 /* system_close --
  *     Close system device.
  *
  * PARAMETERS:
  *     major - major device number for led devices
  *     minor - miled device number for led
  *     arg - device close argument
  *
  * RETURNS:
  *     RTEMS error code
  */
 rtems_device_driver system_close (
   rtems_device_major_number major,
   rtems_device_minor_number minor,
   void *arg
 )
 {
   return RTEMS_SUCCESSFUL;
 }
 
 /* system_read --
  *     Read from the system device
  *
  * PARAMETERS:
  *     major - major device number for led devices
  *     minor - miled device number for led
  *     arg - device read argument
  *
  * RETURNS:
  *     RTEMS error code
  */
 rtems_device_driver system_read (
   rtems_device_major_number major,
   rtems_device_minor_number minor,
   void *arg
 )
 {
   return RTEMS_SUCCESSFUL;
 }
 
 /* system_write --
  *     Write to the system device
  *
  * PARAMETERS:
  *     major - major device number for led devices
  *     minor - miled device number for led
  *     arg - device write argument
  *
  * RETURNS:
  *     RTEMS error code
  */
 rtems_device_driver system_write (
   rtems_device_major_number major,
   rtems_device_minor_number minor,
   void *arg
 )
 {
   return RTEMS_SUCCESSFUL;
 }
 
 /* system_control --
  *     Handle system I/O control (IOCTL)
  *
  * PARAMETERS:
  *     major - major device number for system devices
  *     minor - miled device number for system
  *     arg - device ioctl argument
  *
  * RETURNS:
  *     RTEMS error code
  */
 rtems_device_driver system_control (
   rtems_device_major_number major,
   rtems_device_minor_number minor,
   void *arg
 )
 {
   /* Local Varaibles */
   rtems_libio_ioctl_args_t *args = arg;
   system_control_t *ctrl;
 
   /* Get Data */
   ctrl = ( system_control_t * )args->buffer;
   args->ioctl_return = 0;
 
   /* Parse Command */
   switch( args->command ) {
     case IOCTL_SYSTEM_SOFTWARE_VERSION :
       strcpy( ctrl->version, software_version );
       break;
     case IOCTL_SYSTEM_RESET :
       bsp_reset( ( rtems_fatal_source )0, ( rtems_fatal_code )0 );
       break;
     default :
       args->ioctl_return = -1;
       break;
   }
   /* OK */
   return RTEMS_SUCCESSFUL;
 }

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