source: rtems/c/src/lib/libbsp/powerpc/mcp750/console/console.c @ b73e57b

/*
 *  console.c  -- console I/O package
 *
 *  Copyright (C) 1999 Eric Valette. valette@crf.canon.fr
 *
 * This code is based on the pc386 BSP console.c so the following
 * copyright also applies :
 *
 * (C) Copyright 1997 -
 * - NavIST Group - Real-Time Distributed Systems and Industrial Automation
 *
 * http://pandora.ist.utl.pt
 *
 * Instituto Superior Tecnico * Lisboa * PORTUGAL
 *  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>
#undef __assert
void __assert (const char *file, int line, const char *msg);

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

/* Definitions for BSPConsolePort */
#define BSP_CONSOLE_PORT_CONSOLE (-1)
#define BSP_CONSOLE_PORT_COM1    (BSP_UART_COM1)
#define BSP_CONSOLE_PORT_COM2    (BSP_UART_COM2)
/*
 * Possible value for console input/output :
 *      BSP_CONSOLE_PORT_CONSOLE
 *      BSP_UART_COM1
 *      BSP_UART_COM2
 */

int BSPConsolePort = BSP_UART_COM1;

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

/*-------------------------------------------------------------------------+
| External Prototypes
+--------------------------------------------------------------------------*/

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_ISA_UART_COM1_IRQ,
                                                   BSP_uart_termios_isr_com1,
                                                   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 console_reserve_resources(rtems_configuration_table *conf)
{
    if(BSPConsolePort != BSP_CONSOLE_PORT_CONSOLE)
    {
      rtems_termios_reserve_resources(conf, 1);
    }
   
  return;
}

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 = debug_getc();
  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.
   */


  /*
   * 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_ISA_UART_COM1_IRQ;
      console_isr_data.hdl  = BSP_uart_termios_isr_com1;
          
    }
  else
    {
      assert(BSPConsolePort == BSP_UART_COM2);
      console_isr_data.name = BSP_ISA_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");
    }
  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_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;

  res =  rtems_termios_close (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;

  return rtems_termios_read (arg);
} /* 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;

  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;
}