/*
*
* Copyright (c) 2000 - Rosimildo da Silva
*
* MODULE DESCRIPTION:
* Wrapper API around the ioctls calls for the Micro FrameBuffer
* interface for Embedded Systems
*
* All functions returns 0 on success. Any other value should be
* decoded as an error. A list of errors will be created over time.
*
* $Id$
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/ioctl.h>
#include <rtems/mw_fb.h>
/*
* This function returns the information regarding the display.
* It is called just after the driver be opened to get all needed
* information about the driver. No change in the mode of operation
* of the driver is done with this call.
*/
int ufb_get_screen_info( int fd, struct fb_screeninfo *info )
{
return ioctl( fd, FB_SCREENINFO, ( void *)info);
}
/*
* Returns the mode of the graphics subsystem
*/
int ufb_get_mode( int fd, int *mode )
{
struct fb_exec_function exec;
exec.func_no = FB_FUNC_GET_MODE;
exec.param = ( void *)mode;
return ioctl( fd, FB_EXEC_FUNCTION , ( void *)&exec );
}
/*
* Returns the current collor pallete
*/
int ufb_get_palette( int fd, struct fb_cmap *color )
{
return ioctl( fd, FB_GETPALETTE, ( void *)color );
}
/*
* Set the current collor pallete
*/
int ufb_set_palette( int fd, struct fb_cmap *color )
{
return ioctl( fd, FB_SETPALETTE, ( void *)color );
}
/*
* Does all necessary initialization to put the device in
* graphics mode
*/
int ufb_enter_graphics( int fd, int mode )
{
struct fb_exec_function exec;
exec.func_no = FB_FUNC_ENTER_GRAPHICS;
exec.param = ( void *)mode;
return ioctl( fd, FB_EXEC_FUNCTION , ( void *)&exec );
}
/*
* Switch the device back to the default mode of operation.
* In most cases it put the device back to plain text mode.
*/
int ufb_exit_graphics( int fd )
{
struct fb_exec_function exec;
exec.func_no = FB_FUNC_EXIT_GRAPHICS;
exec.param = 0;
return ioctl( fd, FB_EXEC_FUNCTION , ( void *)&exec );
}
/*
* Tell the driver that the "virtual buffer" is dirty, and an update
* of it to the real device, maybe a serial/parallel LCD or whatever
* is required
*/
int ufb_buffer_is_dirty( int fd )
{
struct fb_exec_function exec;
exec.func_no = FB_FUNC_IS_DIRTY;
exec.param = 0;
return ioctl( fd, FB_EXEC_FUNCTION , ( void *)&exec );
}
/*
* This function maps the physical ( kernel mode ) address of the framebuffer
* device and maps it to the user space address.
*/
int ufb_mmap_to_user_space(
int fd,
void **fb_addr,
void *physical_addr,
unsigned long size
)
{
#ifdef __rtems__
/* RTEMS runs in ring 0, and there is no distinction between
user space and kernel space, so we just return the same
pointer to the caller.
*/
*fb_addr = physical_addr;
return 0;
#else
/* other kernels might want to map it to the user space,
maybe using mmap()
*/
return 0;
#endif
}
/*
* This function unmaps memory of the FB from the user's space
*/
int ufb_unmmap_from_user_space( int fd, void *addr )
{
return 0;
}
