console.c

RTEMS (Real-Time Executive for Multiprocessor Systems) is a free open source real-time operating sys

/*-------------------------------------------------------------------------+
| console.c v1.1 - i386ex BSP - 1997/08/07
+--------------------------------------------------------------------------+
| This file contains the i386ex console I/O package. It is just a termios 
| wrapper.
+--------------------------------------------------------------------------+
| (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
|   console.c,v 1.15 pc386 BSP
| With the following copyright notice:
| **************************************************************************
| *  COPYRIGHT (c) 1989-1999.
| *  On-Line Applications Research Corporation (OAR).
| *
| *  The license and distribution terms for this file may be
| *  found in found in the file LICENSE in this distribution or at
| *  http://www.rtems.com/license/LICENSE.
| **************************************************************************
|
|  $Id: console.c,v 1.8.2.1 2003/09/04 18:44:08 joel Exp $
+--------------------------------------------------------------------------*/

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <rtems/error.h>

#include <bsp.h>
#include <irq.h>
#include <rtems/libio.h>
#include <termios.h>
#include <uart.h>
#include <libcpu/cpuModel.h>

/*
 * Possible value for console input/output :
 *	BSP_UART_COM1
 *	BSP_UART_COM2
 *  BSP_CONSOLE_PORT_CONSOLE is not valid in this BSP.  
 *      All references to either keyboard or video handling have been removed.
 */

int BSPConsolePort = BSP_UART_COM2;
int BSPBaseBaud    = 115200;
int BSP_poll_read(int);

extern BSP_polling_getchar_function_type BSP_poll_char;

static int  conSetAttr(int minor, const struct termios *);
static void isr_on(const rtems_irq_connect_data *);
static void isr_off(const rtems_irq_connect_data *);
static int  isr_is_on(const rtems_irq_connect_data *);

/*
 * Change references to com2 if required.
 */

static rtems_irq_connect_data console_isr_data = 
{ BSP_UART_COM2_IRQ,
  BSP_uart_termios_isr_com2,
  isr_on,
  isr_off,
  isr_is_on};

static void
isr_on(const rtems_irq_connect_data *unused)
{
  return;
}
						   
static void
isr_off(const rtems_irq_connect_data *unused)
{
  return;
}

static int
isr_is_on(const rtems_irq_connect_data *irq)
{
  return BSP_irq_enabled_at_i8259s(irq->name);
}

/*-------------------------------------------------------------------------+
| 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;

  /*
   * Set up TERMIOS
   */
  rtems_termios_initialize ();
  
  /*
   * Do device-specific initialization
   */
  
  /* 115200-8-N-1, without hardware flow control */
  BSP_uart_init(BSPConsolePort, 115200, CHR_8_BITS, 0, 0, 0);
  
  /* Set interrupt handler */
  if(BSPConsolePort == BSP_UART_COM1)
    {
      console_isr_data.name = BSP_UART_COM1_IRQ;
      console_isr_data.hdl  = BSP_uart_termios_isr_com1;
      
    }
  else
    {
      assert(BSPConsolePort == BSP_UART_COM2);
      console_isr_data.name = BSP_UART_COM2_IRQ;
      console_isr_data.hdl  = BSP_uart_termios_isr_com2;
    }
  
  status = BSP_install_rtems_irq_handler(&console_isr_data);
  
  if (!status){
    printk("Error installing serial console interrupt handler!\n");
    rtems_fatal_error_occurred(status);
  }
  /*
   * 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(BSPConsolePort == BSP_UART_COM1)
    {
      printk("Initialized console on port COM1 115200-8-N-1\n\n");
    }
  else
    {
      printk("Initialized console on port COM2 115200-8-N-1\n\n");
    }

  return RTEMS_SUCCESSFUL;
} /* console_initialize */


static int console_last_close(int major, int minor, void *arg)
{
  BSP_remove_rtems_irq_handler (&console_isr_data);

  return 0;
}

/*-------------------------------------------------------------------------+
| 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 */
    console_last_close,       /* lastClose */
    NULL,                     /* poll read  */
    BSP_uart_termios_write_com1, /* write */
    conSetAttr,	              /* setAttributes */
    NULL,	              /* stopRemoteTx */
    NULL,	              /* startRemoteTx */
    1		              /* outputUsesInterrupts */
  };

  if(BSPConsolePort == BSP_UART_COM2)
    {
      cb.write = BSP_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
   */
  BSP_uart_termios_set(BSPConsolePort, 
			 ((rtems_libio_open_close_args_t *)arg)->iop->data1);
  
  /* Enable interrupts  on channel */
  BSP_uart_intr_ctrl(BSPConsolePort, BSP_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)
{

  return (rtems_termios_close (arg));
  
} /* 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_status_code sc;

  sc = rtems_termios_read (arg);

  if ( sc != RTEMS_SUCCESSFUL )
    printk("console_read: fails %s\n",rtems_status_text(sc));

  return sc;

} /* 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)
{
        return rtems_termios_write (arg);
 
} /* console_write */


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

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;
    }

  BSP_uart_set_baud(BSPConsolePort, baud);

  return 0;
}

/*
 * BSP initialization
 */

BSP_output_char_function_type BSP_output_char = 
                       (BSP_output_char_function_type)    BSP_output_char_via_serial;

BSP_polling_getchar_function_type BSP_poll_char =  
                      (BSP_polling_getchar_function_type) BSP_poll_char_via_serial;

int BSP_poll_read(int ttyMinor){
  
  return BSP_poll_char_via_serial();
}