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 /* SPDX-License-Identifier: BSD-2-Clause */
 
 /**
  *  @file
  *
  *  This file contains a test fixture termios device driver
  */
 
 /*
  *  COPYRIGHT (c) 1989-2012.
  *  On-Line Applications Research Corporation (OAR).
  *
  * 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 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.
  */
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
 #include "tmacros.h"
 #include <rtems/libio.h>
 #include <stdlib.h>
 #include <termios.h>
 #include <rtems/termiostypes.h>
 #include <rtems/dumpbuf.h>
 #include "termios_testdriver_intr.h"
 
 /* forward declarations to avoid warnings */
 void termios_test_driver_wait_for_tx_to_complete(void);
 rtems_timer_service_routine Rx_ISR(
   rtems_id  ignored_id,
   void     *ignored_address
 );
 rtems_timer_service_routine Tx_ISR(
   rtems_id  ignored_id,
   void     *ignored_address
 );
 ssize_t termios_test_driver_write_helper(
   int         port,
   const char *buf,
   size_t      len
 );
 int termios_test_driver_set_attributes(
   int                   minor,
   const struct termios *t
 );
 #if defined(TASK_DRIVEN)
   int termios_test_driver_inbyte_nonblocking(int port);
 #endif
 
 /* global variables */
 rtems_id Rx_Timer;
 rtems_id Tx_Timer;
 
 #define TX_MAX 1024
 uint8_t                   Tx_Buffer[TX_MAX];
 int                       Tx_Index = 0;
 struct rtems_termios_tty *Ttyp;
 
 void termios_test_driver_wait_for_tx_to_complete(void)
 {
   rtems_task_wake_after( 2 * rtems_clock_get_ticks_per_second() );
 }
 
 void termios_test_driver_dump_tx(const char *c)
 {
   termios_test_driver_wait_for_tx_to_complete();
 
   printf( "%s %d characters\n", c, Tx_Index );
   rtems_print_buffer( Tx_Buffer, Tx_Index );
   Tx_Index = 0;
 }
   
 const uint8_t *Rx_Buffer;
 int            Rx_Index = 0;
 int            Rx_Length = 0;
 bool           Rx_FirstTime = true;
 bool           Rx_EnqueueNow = false;
 
 #if defined(TASK_DRIVEN)
   int termios_test_driver_inbyte_nonblocking( int port )
   {
     if ( Rx_FirstTime == true ) {
       Rx_FirstTime = false;
       return -1;
     }
     if ( Rx_Index >= Rx_Length )
       return -1;
     return Rx_Buffer[ Rx_Index++ ];
   }
 #endif
 
 rtems_timer_service_routine Rx_ISR(
   rtems_id  ignored_id,
   void     *ignored_address
 )
 {
   uint8_t ch;
 
   if ( Rx_Index >= Rx_Length )
     return;
 
   ch = Rx_Buffer[ Rx_Index++ ];
   rtems_termios_enqueue_raw_characters (Ttyp, (char *)&ch, 1);
   #if defined(TASK_DRIVEN)
     rtems_termios_rxirq_occured(Ttyp);
   #endif
 
   (void) rtems_timer_fire_after( Rx_Timer, 10, Rx_ISR, NULL );
 }
 
 rtems_timer_service_routine Tx_ISR(
   rtems_id  ignored_id,
   void     *ignored_address
 )
 {
   rtems_termios_dequeue_characters (Ttyp, 1);
 
   (void) rtems_timer_fire_after( Tx_Timer, 10, Tx_ISR, NULL );
 }
 
 void termios_test_driver_set_rx_enqueue_now(
   bool value
 )
 {
   Rx_EnqueueNow = value;
 }
 
 void termios_test_driver_set_rx(
   const void *p,
   size_t      len
 )
 {
   Rx_Buffer = p;
   Rx_Length = len;
   Rx_Index  = 0;
 
   if ( Rx_EnqueueNow == false) {
     (void) rtems_timer_fire_after( Rx_Timer, 10, Rx_ISR, NULL );
     return;
   }
 
   do {
     uint8_t ch;
     ch = Rx_Buffer[ Rx_Index++ ];
     rtems_termios_enqueue_raw_characters (Ttyp, (char *)&ch, 1);
   } while (Rx_Index < Rx_Length );
 }
 
 ssize_t termios_test_driver_write_helper(
   int         port,
   const char *buf,
   size_t      len
 )
 {
   if (len > 0) {
     Tx_Buffer[Tx_Index++] = buf[0];
     (void) rtems_timer_fire_after( Tx_Timer, 10, Tx_ISR, NULL );
   }
 
   return 0;
 }
 
 /*
  *  Set Attributes Handler
  */
 int termios_test_driver_set_attributes(
   int                   minor,
   const struct termios *t
 )
 {
   return 0;
 }
 
 /*
  *  Test Device Driver Entry Points
  */
 rtems_device_driver termios_test_driver_initialize(
   rtems_device_major_number  major,
   rtems_device_minor_number  minor,
   void                      *arg
 )
 {
   rtems_termios_initialize();
 
   /*
    *  Register Device Names
    */
   (void) rtems_io_register_name( TERMIOS_TEST_DRIVER_DEVICE_NAME, major, 0 );
 
   return RTEMS_SUCCESSFUL;
 }
 
 static int first_open(int major, int minor, void *arg)
 {
   rtems_status_code status;
 
   status = rtems_timer_create(rtems_build_name('T', 'M', 'R', 'X'), &Rx_Timer);
   if ( status != RTEMS_SUCCESSFUL )
     rtems_fatal_error_occurred(1);
 
   status = rtems_timer_create(rtems_build_name('T', 'M', 'T', 'X'), &Tx_Timer);
   if ( status != RTEMS_SUCCESSFUL )
     rtems_fatal_error_occurred(1);
 
   return 0;
 }
 
 static int last_close(int major, int minor, void *arg)
 {
   rtems_status_code status;
 
   status = rtems_timer_cancel(Rx_Timer);
   if ( status != RTEMS_SUCCESSFUL )
     rtems_fatal_error_occurred(1);
 
   status = rtems_timer_cancel(Tx_Timer);
   if ( status != RTEMS_SUCCESSFUL )
     rtems_fatal_error_occurred(1);
 
   status = rtems_timer_delete(Rx_Timer);
   if ( status != RTEMS_SUCCESSFUL )
     rtems_fatal_error_occurred(1);
 
   status = rtems_timer_delete(Tx_Timer);
   if ( status != RTEMS_SUCCESSFUL )
     rtems_fatal_error_occurred(1);
 
   return 0;
 }
 
 rtems_device_driver termios_test_driver_open(
   rtems_device_major_number major,
   rtems_device_minor_number minor,
   void                    * arg
 )
 {
   rtems_status_code sc;
   rtems_libio_open_close_args_t *args = arg;
   static const rtems_termios_callbacks Callbacks = {
     first_open,                              /* firstOpen */
     last_close,                              /* lastClose */
     #if defined(TASK_DRIVEN)
       termios_test_driver_inbyte_nonblocking,/* pollRead */
     #else
       NULL,                                  /* pollRead */
     #endif
     termios_test_driver_write_helper,        /* write */
     termios_test_driver_set_attributes,      /* setAttributes */
     NULL,                                    /* stopRemoteTx */
     NULL,                                    /* startRemoteTx */
     #if defined(TASK_DRIVEN)
       TERMIOS_TASK_DRIVEN                    /* outputUsesInterrupts */
     #else
       TERMIOS_POLLED                         /* outputUsesInterrupts */
     #endif
   };
 
   if ( minor > 2 ) {
     puts( "ERROR - Termios_testdriver - only 1 minor supported" );
     rtems_test_exit(0);
   }
 
   sc = rtems_termios_open (major, minor, arg, &Callbacks);
   directive_failed( sc, "termios open" ); 
 
   Ttyp = args->iop->data1;   /* Keep cookie returned by termios_open */
 
   return RTEMS_SUCCESSFUL;
 }
 
 rtems_device_driver termios_test_driver_close(
   rtems_device_major_number major,
   rtems_device_minor_number minor,
   void                    * arg
 )
 {
   return rtems_termios_close (arg);
 }
 
 rtems_device_driver termios_test_driver_read(
   rtems_device_major_number major,
   rtems_device_minor_number minor,
   void                    * arg
 )
 {
   return rtems_termios_read (arg);
 }
 
 rtems_device_driver termios_test_driver_write(
   rtems_device_major_number major,
   rtems_device_minor_number minor,
   void                    * arg
 )
 {
   return rtems_termios_write (arg);
 }
 
 rtems_device_driver termios_test_driver_control(
   rtems_device_major_number major,
   rtems_device_minor_number minor,
   void                    * arg
 )
 {
   return rtems_termios_ioctl (arg);
 }

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