source: rtems/c/src/lib/libbsp/i386/pc386/console/console.c @ 5d18fb0

/*-------------------------------------------------------------------------+
| console.c v1.1 - PC386 BSP - 1997/08/07
+--------------------------------------------------------------------------+
| This file contains the PC386 console I/O package.
+--------------------------------------------------------------------------+
| (C) Copyright 1997 -
| - NavIST Group - Real-Time Distributed Systems and Industrial Automation
|
| http://pandora.ist.utl.pt
|
| Instituto Superior Tecnico * Lisboa * PORTUGAL
+--------------------------------------------------------------------------+
| Disclaimer:
|
| This file is provided "AS IS" without warranty of any kind, either
| expressed or implied.
+--------------------------------------------------------------------------+
| This code is based on:
|   console.c,v 1.4 1995/12/19 20:07:23 joel Exp - go32 BSP
| With the following copyright notice:
| **************************************************************************
| *  COPYRIGHT (c) 1989-1998.
| *  On-Line Applications Research Corporation (OAR).
| *  Copyright assigned to U.S. Government, 1994. 
| *
| *  The license and distribution terms for this file may be
| *  found in found in the file LICENSE in this distribution or at
| *  http://www.OARcorp.com/rtems/license.html.
| **************************************************************************
|
|  $Id$
+--------------------------------------------------------------------------*/


#include <stdlib.h>
#include <assert.h>

#include <bsp.h>
#include <irq.h>
#include <rtems/libio.h>
#include <termios.h>
#include <pc386uart.h>

int PC386ConsolePort = PC386_CONSOLE_PORT_CONSOLE;

static int conSetAttr(int minor, const struct termios *);

/*-------------------------------------------------------------------------+
| Constants
+--------------------------------------------------------------------------*/
#define KEYBOARD_IRQ  0x01  /* Keyboard IRQ. */


/*-------------------------------------------------------------------------+
| External Prototypes
+--------------------------------------------------------------------------*/
extern rtems_isr _IBMPC_keyboard_isr(rtems_vector_number);
       /* keyboard (IRQ 0x01) Interrupt Service Routine (defined in 'inch.c') */


void console_reserve_resources(rtems_configuration_table *conf)
{
  if(PC386ConsolePort != PC386_CONSOLE_PORT_CONSOLE)
    {
      rtems_termios_reserve_resources(conf, 1);
    }
  return;
}

void __assert(const char *file, int line, const char *msg)
{
  printk("assert failed: %s: ", file);
  printk("%d: ", line);
  printk("%s\n", msg);

  exit(1);

  return;
}

/*-------------------------------------------------------------------------+
| Console device driver INITIALIZE entry point.
+--------------------------------------------------------------------------+
| Initilizes the I/O console (keyboard + VGA display) driver.
+--------------------------------------------------------------------------*/
rtems_device_driver
console_initialize(rtems_device_major_number major,
                   rtems_device_minor_number minor,
                   void                      *arg)
{
  rtems_status_code status;

  /* Initialize video */
  _IBMPC_initVideo();

  if(PC386ConsolePort == PC386_CONSOLE_PORT_CONSOLE)
    {

      /* Install keyboard interrupt handler */
      status = PC386_installRtemsIrqHandler(KEYBOARD_IRQ, _IBMPC_keyboard_isr);

      if (status != RTEMS_SUCCESSFUL)
        {
          printk("Error installing keyboard interrupt handler!\n");
          rtems_fatal_error_occurred(status);
        }
      
      status = rtems_io_register_name("/dev/console", major, 0);
      if (status != RTEMS_SUCCESSFUL)
        {
          printk("Error registering console device!\n");
          rtems_fatal_error_occurred(status);
        }
      printk("Initialized console on port CONSOLE\n\n");
    }
  else
    {
      /*
       * Set up TERMIOS
       */
      rtems_termios_initialize ();
      
      /*
       * Do device-specific initialization
       */
      
      /* 9600-8-N-1 */
      PC386_uart_init(PC386ConsolePort, 9600, 0);
      
      
      /* Set interrupt handler */
      if(PC386ConsolePort == PC386_UART_COM1)
        {
          status = PC386_installRtemsIrqHandler(PC386_UART_COM1_IRQ,
                                                PC386_uart_termios_isr_com1);
        }
      else
        {
          assert(PC386ConsolePort == PC386_UART_COM2);

          status = PC386_installRtemsIrqHandler(PC386_UART_COM2_IRQ,
                                                PC386_uart_termios_isr_com2);
        }
      /*
       * Register the device
       */
      status = rtems_io_register_name ("/dev/console", major, 0);
      if (status != RTEMS_SUCCESSFUL)
        {
          printk("Error registering console device!\n");
          rtems_fatal_error_occurred (status);
        }

      if(PC386ConsolePort == PC386_UART_COM1)
        {
          printk("Initialized console on port COM1 9600-8-N-1\n\n");
        }
      else
        {
          printk("Initialized console on port COM2 9600-8-N-1\n\n");
        }
    }
 
  return RTEMS_SUCCESSFUL;
} /* console_initialize */


/*-------------------------------------------------------------------------+
| Console device driver OPEN entry point
+--------------------------------------------------------------------------*/
rtems_device_driver
console_open(rtems_device_major_number major,
                rtems_device_minor_number minor,
                void                      *arg)
{
  rtems_status_code              status;
  static rtems_termios_callbacks cb = 
  {
    NULL,                     /* firstOpen */
    NULL,                     /* lastClose */
    NULL,                     /* pollRead */
    PC386_uart_termios_write_com1, /* write */
    conSetAttr,               /* setAttributes */
    NULL,                     /* stopRemoteTx */
    NULL,                     /* startRemoteTx */
    1                         /* outputUsesInterrupts */
  };

  if(PC386ConsolePort == PC386_CONSOLE_PORT_CONSOLE)
    {
      return RTEMS_SUCCESSFUL;
    }

  if(PC386ConsolePort == PC386_UART_COM2)
    {
      cb.write = PC386_uart_termios_write_com2;
    }

  status = rtems_termios_open (major, minor, arg, &cb);

  if(status != RTEMS_SUCCESSFUL)
    {
      printk("Error openning console device\n");
      return status;
    }

  /*
   * Pass data area info down to driver
   */
  PC386_uart_termios_set(PC386ConsolePort, 
                         ((rtems_libio_open_close_args_t *)arg)->iop->data1);
  
  /* Enable interrupts  on channel */
  PC386_uart_intr_ctrl(PC386ConsolePort, PC386_UART_INTR_CTRL_TERMIOS);

  return RTEMS_SUCCESSFUL;
}

/*-------------------------------------------------------------------------+
| Console device driver CLOSE entry point
+--------------------------------------------------------------------------*/
rtems_device_driver
console_close(rtems_device_major_number major,
              rtems_device_minor_number minor,
              void                      *arg)
{
  if(PC386ConsolePort != PC386_CONSOLE_PORT_CONSOLE)
    {
      return rtems_termios_close (arg);
    }

  return RTEMS_SUCCESSFUL;
} /* console_close */

 
/*-------------------------------------------------------------------------+
| Console device driver READ entry point.
+--------------------------------------------------------------------------+
| Read characters from the I/O console. We only have stdin.
+--------------------------------------------------------------------------*/
rtems_device_driver
console_read(rtems_device_major_number major,
             rtems_device_minor_number minor,
             void                      *arg)
{
  rtems_libio_rw_args_t *rw_args = (rtems_libio_rw_args_t *)arg;
  char                  *buffer  = rw_args->buffer;
  int            count, maximum  = rw_args->count;

  if(PC386ConsolePort != PC386_CONSOLE_PORT_CONSOLE)
    {
      return rtems_termios_read (arg);
    }
 
  for (count = 0; count < maximum; count++)
  {
    /* Get character */
    buffer[count] = _IBMPC_inch_sleep();

    /* Echo character to screen */
    _IBMPC_outch(buffer[count]);
    if (buffer[count] == '\r')
      {
        _IBMPC_outch('\n');  /* CR = CR + LF */
      }

    if (buffer[count] == '\n' || buffer[count] == '\r')
    {
      /* What if this goes past the end of the buffer?  We're hosed. [bhc] */
      buffer[count++]  = '\n';
      buffer[count]    = '\0';
      break;
    }
  }
 
  rw_args->bytes_moved = count;
  return ((count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED);
} /* console_read */
 

/*-------------------------------------------------------------------------+
| Console device driver WRITE entry point.
+--------------------------------------------------------------------------+
| Write characters to the I/O console. Stderr and stdout are the same.
+--------------------------------------------------------------------------*/
rtems_device_driver
console_write(rtems_device_major_number major,
              rtems_device_minor_number minor,
              void                    * arg)
{
  rtems_libio_rw_args_t *rw_args = (rtems_libio_rw_args_t *)arg;
  char                  *buffer  = rw_args->buffer;
  int            count, maximum  = rw_args->count;

  if(PC386ConsolePort != PC386_CONSOLE_PORT_CONSOLE)
    {
      return rtems_termios_write (arg);
    }
 
  for (count = 0; count < maximum; count++)
  {
    _IBMPC_outch(buffer[count]);
    if (buffer[count] == '\n')
      _IBMPC_outch('\r');            /* LF = LF + CR */
  }

  rw_args->bytes_moved = maximum;
  return RTEMS_SUCCESSFUL;
} /* console_write */


 
/*
 * Handle ioctl request.
 */
rtems_device_driver 
console_control(rtems_device_major_number major,
                rtems_device_minor_number minor,
                void                      * arg
)
{ 
  if(PC386ConsolePort != PC386_CONSOLE_PORT_CONSOLE)
    {
      return rtems_termios_ioctl (arg);
    }

  return RTEMS_SUCCESSFUL;
}

static int
conSetAttr(int minor, const struct termios *t)
{
  int baud;

  switch (t->c_cflag & CBAUD) 
    {
    case B50:   
      baud = 50;
      break;
    case B75:   
      baud = 75;        
      break;
    case B110:  
      baud = 110;       
      break;
    case B134:  
      baud = 134;       
      break;
    case B150:  
      baud = 150;       
      break;
    case B200:
      baud = 200;       
      break;
    case B300:  
      baud = 300;
      break;
    case B600:  
      baud = 600;       
      break;
    case B1200: 
      baud = 1200;
      break;
    case B1800: 
      baud = 1800;      
      break;
    case B2400: 
      baud = 2400;
      break;
    case B4800: 
      baud = 4800;
      break;
    case B9600: 
      baud = 9600;
      break;
    case B19200:
      baud = 19200;
      break;
    case B38400:
      baud = 38400;
      break;
    case B57600:        
      baud = 57600;
      break;
    case B115200:
      baud = 115200;
      break;
    default:
      baud = 0;
      rtems_fatal_error_occurred (RTEMS_INTERNAL_ERROR);
      return 0;
    }

  PC386_uart_set_baud(PC386ConsolePort, baud);

  return 0;
}