/*
* Input/Output Manager
*
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include <rtems/system.h>
#include <rtems/io.h>
#include <rtems/score/isr.h>
#include <rtems/score/thread.h>
#include <rtems/score/wkspace.h>
#include <string.h>
/*PAGE
*
* _IO_Manager_initialization
*
*/
void _IO_Manager_initialization(
rtems_driver_address_table *driver_table,
unsigned32 number_of_drivers,
unsigned32 number_of_devices
)
{
void *tmp;
unsigned32 index;
rtems_driver_name_t *np;
_IO_Driver_address_table = driver_table;
_IO_Number_of_drivers = number_of_drivers;
_IO_Number_of_devices = number_of_devices;
tmp = _Workspace_Allocate_or_fatal_error(
sizeof( rtems_driver_name_t ) * ( number_of_devices + 1 )
);
_IO_Driver_name_table = (rtems_driver_name_t *) tmp;
for( index=0, np = _IO_Driver_name_table ;
index < _IO_Number_of_devices ;
index++, np++ ) {
np->device_name = 0;
np->device_name_length = 0;
np->major = 0;
np->minor = 0;
}
}
/*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, NULL);
}
/*PAGE
*
* rtems_io_register_name
*
* Associate a name with a driver
*
* Input Paramters:
* device_name - pointer to name string to associate with device
* major - device major number to receive name
* minor - device minor number to receive name
*
* Output Parameters:
* RTEMS_SUCCESSFUL - if successful
* error code - if unsuccessful
*/
#if 0
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;
unsigned32 index;
/* find an empty slot */
for( index=0, np = _IO_Driver_name_table ;
index < _IO_Number_of_devices ;
index++, np++ )
{
_ISR_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;
_ISR_Enable(level);
return RTEMS_SUCCESSFUL;
}
_ISR_Enable(level);
}
return RTEMS_TOO_MANY;
}
#endif
/*PAGE
*
* rtems_io_lookup_name
*
* Find what driver "owns" this name
*
* Input Paramters:
* name - name to lookup the associated device
*
* Output Parameters:
* device_info - device associate with name
* RTEMS_SUCCESSFUL - if successful
* error code - if unsuccessful
*/
#if 0
rtems_status_code rtems_io_lookup_name(
const char *name,
rtems_driver_name_t **device_info
)
{
rtems_driver_name_t *np;
unsigned32 index;
for( index=0, np = _IO_Driver_name_table ;
index < _IO_Number_of_devices ;
index++, np++ )
if (np->device_name)
if (strncmp(np->device_name, name, np->device_name_length) == 0)
{
*device_info = np;
return RTEMS_SUCCESSFUL;
}
*device_info = 0;
return RTEMS_UNSATISFIED;
}
#endif
/*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_entry;
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_entry;
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_entry;
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_entry;
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_entry;
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_entry;
return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;
}
