/*
* Input/Output Manager
*
*
* COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
* On-Line Applications Research Corporation (OAR).
* All rights assigned to U.S. Government, 1994.
*
* This material may be reproduced by or for the U.S. Government pursuant
* to the copyright license under the clause at DFARS 252.227-7013. This
* notice must appear in all copies of this file and its derivatives.
*
* $Id$
*/
#include <rtems/system.h>
#include <rtems/config.h>
#include <rtems/io.h>
#include <rtems/isr.h>
#include <rtems/thread.h>
#include <rtems/intr.h>
#include <string.h>
/*PAGE
*
* _IO_Initialize_all_drivers
*
* This routine initializes all device drivers
*
* Input Paramters: NONE
*
* Output Parameters: NONE
*/
void _IO_Initialize_all_drivers( void )
{
rtems_device_major_number major;
for ( major=0 ; major < _IO_Number_of_drivers ; major ++ )
(void) rtems_io_initialize( major, 0, _Configuration_Table);
}
/*PAGE
*
* rtems_io_register_name
*
* Associate a name with a driver
*
* Input Paramters:
*
* Output Parameters:
*/
rtems_status_code rtems_io_register_name(
char *device_name,
rtems_device_major_number major,
rtems_device_minor_number minor
)
{
rtems_driver_name_t *np;
unsigned32 level;
/* find an empty slot */
for (np = rtems_driver_name_table; np < &rtems_driver_name_table[RTEMS_MAX_DRIVER_NAMES]; np++)
{
rtems_interrupt_disable(level);
if (np->device_name == 0)
{
np->device_name = device_name;
np->device_name_length = strlen(device_name);
np->major = major;
np->minor = minor;
rtems_interrupt_enable(level);
return RTEMS_SUCCESSFUL;
}
rtems_interrupt_enable(level);
}
return RTEMS_TOO_MANY;
}
/*PAGE
*
* rtems_io_lookup_name
*
* Find what driver "owns" this name
*
* Input Paramters:
*
* Output Parameters:
*/
rtems_status_code rtems_io_lookup_name(
const char *pathname,
rtems_driver_name_t **rnp
)
{
rtems_driver_name_t *np;
for (np = rtems_driver_name_table; np < &rtems_driver_name_table[RTEMS_MAX_DRIVER_NAMES]; np++)
if (np->device_name)
if (strncmp(np->device_name, pathname, np->device_name_length) == 0)
{
*rnp = np;
return RTEMS_SUCCESSFUL;
}
*rnp = 0;
return RTEMS_UNSATISFIED;
}
/*PAGE
*
* rtems_io_initialize
*
* This routine is the initialization directive of the IO manager.
*
* Input Paramters:
* major - device driver number
* minor - device number
* argument - pointer to argument(s)
*
* Output Parameters:
* returns - return code
*/
rtems_status_code rtems_io_initialize(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *argument
)
{
rtems_device_driver_entry callout;
if ( major >= _IO_Number_of_drivers )
return RTEMS_INVALID_NUMBER;
callout = _IO_Driver_address_table[major].initialization;
return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;
}
/*PAGE
*
* rtems_io_open
*
* This routine is the open directive of the IO manager.
*
* Input Paramters:
* major - device driver number
* minor - device number
* argument - pointer to argument(s)
*
* Output Parameters:
* returns - return code
*/
rtems_status_code rtems_io_open(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *argument
)
{
rtems_device_driver_entry callout;
if ( major >= _IO_Number_of_drivers )
return RTEMS_INVALID_NUMBER;
callout = _IO_Driver_address_table[major].open;
return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;
}
/*PAGE
*
* rtems_io_close
*
* This routine is the close directive of the IO manager.
*
* Input Paramters:
* major - device driver number
* minor - device number
* argument - pointer to argument(s)
*
* Output Parameters:
* returns - return code
*/
rtems_status_code rtems_io_close(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *argument
)
{
rtems_device_driver_entry callout;
if ( major >= _IO_Number_of_drivers )
return RTEMS_INVALID_NUMBER;
callout = _IO_Driver_address_table[major].close;
return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;
}
/*PAGE
*
* rtems_io_read
*
* This routine is the read directive of the IO manager.
*
* Input Paramters:
* major - device driver number
* minor - device number
* argument - pointer to argument(s)
*
* Output Parameters:
* returns - return code
*/
rtems_status_code rtems_io_read(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *argument
)
{
rtems_device_driver_entry callout;
if ( major >= _IO_Number_of_drivers )
return RTEMS_INVALID_NUMBER;
callout = _IO_Driver_address_table[major].read;
return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;
}
/*PAGE
*
* rtems_io_write
*
* This routine is the write directive of the IO manager.
*
* Input Paramters:
* major - device driver number
* minor - device number
* argument - pointer to argument(s)
*
* Output Parameters:
* returns - return code
*/
rtems_status_code rtems_io_write(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *argument
)
{
rtems_device_driver_entry callout;
if ( major >= _IO_Number_of_drivers )
return RTEMS_INVALID_NUMBER;
callout = _IO_Driver_address_table[major].write;
return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;
}
/*PAGE
*
* rtems_io_control
*
* This routine is the control directive of the IO manager.
*
* Input Paramters:
* major - device driver number
* minor - device number
* argument - pointer to argument(s)
*
* Output Parameters:
* returns - return code
*/
rtems_status_code rtems_io_control(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *argument
)
{
rtems_device_driver_entry callout;
if ( major >= _IO_Number_of_drivers )
return RTEMS_INVALID_NUMBER;
callout = _IO_Driver_address_table[major].control;
return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;
}
