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/*
* RTEMS for Nintendo DS framebuffer display driver.
*
* Copyright (c) 2008 by Matthieu Bucchianeri <mbucchia@gmail.com>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
*
* http://www.rtems.com/license/LICENSE
*/
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <bsp.h>
#include <rtems/irq.h>
#include <rtems/libio.h>
#include <nds.h>
#include <rtems/fb.h>
#include <rtems/framebuffer.h>
/*
* screen information for the driver (fb0).
*/
static struct fb_var_screeninfo fb_var_info = {
.xres = SCREEN_WIDTH, /* screen size x, y */
.yres = SCREEN_HEIGHT,
.bits_per_pixel = 16 /* bits per pixel */
};
static struct fb_fix_screeninfo fb_fix_info = {
.smem_start = (void *) VRAM_A, /* buffer pointer */
.smem_len = 0x18000, /* buffer size */
.type = FB_TYPE_PACKED_PIXELS, /* type of dsplay */
.visual = FB_VISUAL_TRUECOLOR, /* color scheme used */
.line_length = SCREEN_WIDTH /* pixels per line (redundant with xres ?) */
};
/*
* screen information for the driver (fb1).
*/
static struct fb_var_screeninfo fb_var_info2 = {
.xres = SCREEN_WIDTH, /* screen size x, y */
.yres = SCREEN_HEIGHT,
.bits_per_pixel = 16 /* bits per pixel */
};
static struct fb_fix_screeninfo fb_fix_info2 = {
.smem_start = (void *) VRAM_B, /* buffer pointer */
.smem_len = 0x18000, /* buffer size */
.type = FB_TYPE_PACKED_PIXELS, /* type of dsplay */
.visual = FB_VISUAL_TRUECOLOR, /* color scheme used */
.line_length = SCREEN_WIDTH /* pixels per line (redundant with xres ?) */
};
/*
* fbds device driver initialize entry point.
*/
rtems_device_driver
frame_buffer_initialize (rtems_device_major_number major,
rtems_device_minor_number minor, void *arg)
{
rtems_status_code status;
printk ("[+] framebuffer started\n");
/* register the devices */
status = rtems_io_register_name (FRAMEBUFFER_DEVICE_0_NAME, major, 0);
if (status != RTEMS_SUCCESSFUL) {
printk ("[!] error registering framebuffer\n");
rtems_fatal_error_occurred (status);
}
status = rtems_io_register_name (FRAMEBUFFER_DEVICE_NAME "1", major, 1);
if (status != RTEMS_SUCCESSFUL) {
printk ("[!] error registering framebuffer\n");
rtems_fatal_error_occurred (status);
}
return RTEMS_SUCCESSFUL;
}
/*
* fbds device driver open operation.
*/
rtems_device_driver
frame_buffer_open (rtems_device_major_number major,
rtems_device_minor_number minor, void *arg)
{
printk ("[#] entering graphic mode on fb%d\n", minor);
if (!minor) {
videoSetMode (MODE_FB0);
vramSetBankA (VRAM_A_LCD);
memset ((void *)fb_fix_info.smem_start, 0, fb_fix_info.smem_len);
} else {
videoSetModeSub (MODE_FB0);
vramSetBankB (VRAM_B_LCD);
memset ((void *)fb_fix_info2.smem_start, 0, fb_fix_info2.smem_len);
}
return RTEMS_SUCCESSFUL;
}
/*
* fbds device driver close operation.
*/
rtems_device_driver
frame_buffer_close (rtems_device_major_number major,
rtems_device_minor_number minor, void *arg)
{
printk ("[#] leaving graphic mode on fb%d\n", minor);
if (!minor) {
memset ((void *)fb_fix_info.smem_start, 0, fb_fix_info.smem_len);
}
else {
memset ((void *)fb_fix_info2.smem_start, 0, fb_fix_info2.smem_len);
/* back to console */
videoSetModeSub (MODE_0_2D | DISPLAY_BG0_ACTIVE);
vramSetBankC (VRAM_C_SUB_BG);
}
return RTEMS_SUCCESSFUL;
}
/*
* fbds device driver read operation.
*/
rtems_device_driver
frame_buffer_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;
rw_args->bytes_moved = 0;
return RTEMS_SUCCESSFUL;
}
/*
* fbds device driver write operation.
*/
rtems_device_driver
frame_buffer_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;
rw_args->bytes_moved = 0;
return RTEMS_SUCCESSFUL;
}
/*
* ioctl entry point.
*/
rtems_device_driver
frame_buffer_control (rtems_device_major_number major,
rtems_device_minor_number minor, void *arg)
{
rtems_libio_ioctl_args_t *args = arg;
/* XXX check minor */
switch (args->command) {
case FBIOGET_VSCREENINFO:
memcpy (args->buffer, minor ? &fb_var_info2 : &fb_var_info, sizeof (fb_var_info));
args->ioctl_return = 0;
break;
case FBIOGET_FSCREENINFO:
memcpy (args->buffer, minor ? &fb_fix_info2 : &fb_fix_info, sizeof (fb_fix_info));
args->ioctl_return = 0;
break;
case FBIOGETCMAP:
args->ioctl_return = 0; /* XXX */
break;
case FBIOPUTCMAP:
args->ioctl_return = 0; /* XXX */
break;
/* no break on purpose */
default:
args->ioctl_return = 0;
break;
}
return RTEMS_SUCCESSFUL;
}
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