source: rtems/c/src/lib/libbsp/powerpc/shared/console/console.c @ 6ad36947

/*
 *  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
 *
 * Till Straumann, <strauman@slac.stanford.edu>, 12/20/2001
 * separate BSP specific stuff from generics...
 *
 * 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>
#include <stdlib.h>

extern int close(int fd);

#include <bsp.h>
#include <bsp/irq.h>
#include <rtems/bspIo.h>
#include <rtems/libio.h>
#include <termios.h>
#include <bsp/uart.h>
#include <rtems/bspIo.h>        /* printk */

/* Definitions for BSPConsolePort */
/*
 * Possible value for console input/output :
 *      BSP_CONSOLE_PORT_CONSOLE
 *      BSP_UART_COM1
 *      BSP_UART_COM2
 */
int BSPConsolePort = BSP_CONSOLE_PORT;

int BSPBaseBaud    = BSP_UART_BAUD_BASE;

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

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

typedef struct TtySTblRec_ {
                char    *name;
                void    (*isr)(void); /* STUPID API doesn't pass a parameter :-( */
} TtySTblRec, *TtySTbl;

static TtySTblRec ttyS[]={
                { "/dev/ttyS0",
#ifdef BSP_UART_IOBASE_COM1
                  BSP_uart_termios_isr_com1
#else
                  0
#endif
                },
                { "/dev/ttyS1",
#ifdef BSP_UART_IOBASE_COM2
                  BSP_uart_termios_isr_com2
#else
                  0
#endif
                },
};


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

  /* RTEMS calls this routine once with 'minor'==0; loop through
   * all known instances...
   */
     
  for (minor=0; minor < sizeof(ttyS)/sizeof(ttyS[0]); minor++) {
        char *nm;
          /*
           * Skip ports (possibly not supported by BSP...) we have no ISR for
           */
          if ( ! ttyS[minor].isr )
                continue;
          /*
           * Register the device
           */
          status = rtems_io_register_name ((nm=ttyS[minor].name), major, minor);
          if ( RTEMS_SUCCESSFUL==status && BSPConsolePort == minor)
                {
                  printk("Registering /dev/console as minor %d (==%s)\n",
                                                        minor,
                                                        ttyS[minor].name);
                  /* also register an alias */
                  status = rtems_io_register_name (
                                                        (nm="/dev/console"),
                                                        major,
                                                        minor);
                }
          if (status != RTEMS_SUCCESSFUL)
                {
                  printk("Error registering %s!\n",nm);
                  rtems_fatal_error_occurred (status);
                }

  }
  return RTEMS_SUCCESSFUL;
} /* console_initialize */

static int console_first_open(int major, int minor, void *arg)
{
  rtems_status_code status;

          /* must not open a minor device we have no ISR for */
          assert( minor>=0 && minor < sizeof(ttyS)/sizeof(ttyS[0]) && ttyS[minor].isr );

          /* 9600-8-N-1 */
          BSP_uart_init(minor, 9600, 0);
          status = BSP_uart_install_isr(minor, ttyS[minor].isr);
          if (!status)
                {
                  printk("Error installing serial console interrupt handler for '%s'!\n",
                                ttyS[minor].name);
                  rtems_fatal_error_occurred(status);
                }
          return 0;
}


static int console_last_close(int major, int minor, void *arg)
{
  BSP_uart_remove_isr(minor, ttyS[minor].isr);
  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 = 
  {
    console_first_open,                 /* firstOpen */
    console_last_close,                 /* lastClose */
    NULL,                                               /* pollRead */
    BSP_uart_termios_write_com, /* write */
    conSetAttr,                                 /* setAttributes */
    NULL,                                               /* stopRemoteTx */
    NULL,                                               /* startRemoteTx */
    1                                                   /* outputUsesInterrupts */
  };

  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(minor, 
                         ((rtems_libio_open_close_args_t *)arg)->iop->data1);
  /* Enable interrupts  on channel */
  BSP_uart_intr_ctrl(minor, 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)
{

  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)
{

  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
)
{ 
/* does the BSP support break callbacks ? */
#if defined(BIOCSETBREAKCB) && defined(BIOCGETBREAKCB)
rtems_libio_ioctl_args_t        *ioa=arg;
        switch (ioa->command) {
                        case BIOCSETBREAKCB:
                                return BSP_uart_set_break_cb(minor, ioa);
                        case BIOCGETBREAKCB:
                                return BSP_uart_get_break_cb(minor, ioa);
                        
                        default:
                                break;
        }
#endif
  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(minor, baud);

  return 0;
}