source: rtems/c/src/lib/libbsp/i386/pc386/console/console.c @ 09b6a093

/*-------------------------------------------------------------------------+
| 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) 1989-1999.
| *  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.OARcorp.com/rtems/license.html.
| **************************************************************************
|
|  $Id$
+--------------------------------------------------------------------------*/

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <unistd.h>
#undef __assert
void __assert (const char *file, int line, const char *msg);

#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_CONSOLE_PORT_CONSOLE
 *      BSP_UART_COM1
 *      BSP_UART_COM2
 *
 * Note:
 *   1. Currently BSPPrintkPort, cannot be assigned to COM2,
 *      it will be fixed soon.
 *
 *   2. If both BSPConsolePort and BSPPrintkport are assigned
 *      to same serial device it does not work that great
 */

int BSPConsolePort = BSP_CONSOLE_PORT_CONSOLE;
int BSPPrintkPort  = BSP_CONSOLE_PORT_CONSOLE;

/* int BSPConsolePort = BSP_UART_COM2;  */
int BSPBaseBaud    = 115200;

extern BSP_polling_getchar_function_type BSP_poll_char;

/*-------------------------------------------------------------------------+
| External Prototypes
+--------------------------------------------------------------------------*/
extern void _IBMPC_keyboard_isr(void);
extern rtems_boolean _IBMPC_scankey(char *);  /* defined in 'inch.c' */
extern char BSP_wait_polled_input(void);
extern void _IBMPC_initVideo(void);

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 *);


static rtems_irq_connect_data console_isr_data = {BSP_KEYBOARD,
                                                   _IBMPC_keyboard_isr,
                                                   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);
}

void __assert (const char *file, int line, const char *msg)
{
    static   char exit_msg[] = "EXECUTIVE SHUTDOWN! Any key to reboot...";
  unsigned char  ch;
   
  /*
   * Note we cannot call exit or printf from here, 
   * assert can fail inside ISR too
   */

   /*
   * Close console
   */
  close(2);
  close(1);
  close(0);

  printk("\nassert failed: %s: ", file);
  printk("%d: ", line);
  printk("%s\n\n", msg);
  printk(exit_msg);
  ch = BSP_poll_char();
  printk("\n\n");
  rtemsReboot();

}


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

  /*
   *  The video was initialized in the start.s code and does not need
   *  to be reinitialized.
   */


  if(BSPConsolePort == BSP_CONSOLE_PORT_CONSOLE)
    {
      /* Install keyboard interrupt handler */
      status = BSP_install_rtems_irq_handler(&console_isr_data);
  
      if (!status)
        {
          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 */
      BSP_uart_init(BSPConsolePort, 9600, 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 9600-8-N-1\n\n");
        }
      else
        {
          printk("Initialized console on port COM2 9600-8-N-1\n\n");
        }

      if(BSPPrintkPort == BSP_UART_COM1)
        {
          printk("Warning : This will be the last message on console\n");

          /*
           * FIXME: cast below defeats the very idea of having
           * function pointer types defined
           */
          BSP_output_char = (BSP_output_char_function_type)
                              BSP_output_char_via_serial;
          BSP_poll_char   = (BSP_polling_getchar_function_type)
                              BSP_poll_char_via_serial;
        }
      else if(BSPPrintkPort != BSP_CONSOLE_PORT_CONSOLE)
        {
           printk("illegal assignement of projtk channel");
         rtems_fatal_error_occurred (status);
        }

    }
  return RTEMS_SUCCESSFUL;
} /* console_initialize */


static int console_open_count = 0;

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,                     /* pollRead */
    BSP_uart_termios_write_com1, /* write */
    conSetAttr,               /* setAttributes */
    NULL,                     /* stopRemoteTx */
    NULL,                     /* startRemoteTx */
    1                         /* outputUsesInterrupts */
  };

  if(BSPConsolePort == BSP_CONSOLE_PORT_CONSOLE)
    {
      ++console_open_count;
      return RTEMS_SUCCESSFUL;
    }

  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)
{
  rtems_device_driver res = RTEMS_SUCCESSFUL;

  if(BSPConsolePort != BSP_CONSOLE_PORT_CONSOLE)
    {
      res =  rtems_termios_close (arg);
    }
  else {
    if (--console_open_count == 0) { 
      console_last_close(major, minor, arg);
    }
  }
  
  return res;
} /* 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(BSPConsolePort != BSP_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(BSPConsolePort != BSP_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(BSPConsolePort != BSP_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;
    }

  BSP_uart_set_baud(BSPConsolePort, baud);

  return 0;
}

/*
 * BSP initialization
 */

BSP_output_char_function_type BSP_output_char = 
                       (BSP_output_char_function_type) _IBMPC_outch;

BSP_polling_getchar_function_type BSP_poll_char = BSP_wait_polled_input;