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/*
* Copyright 2008 Freescale Semiconductor, Inc.
* York Sun <yorksun@freescale.com>
*
* FSL DIU Framebuffer driver
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <command.h>
#include <asm/io.h>
#include <fsl_diu_fb.h>
DECLARE_GLOBAL_DATA_PTR;
void diu_set_pixel_clock(unsigned int pixclock)
{
volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
volatile clk512x_t *clk = &immap->clk;
volatile unsigned int *clkdvdr = &clk->scfr[0];
unsigned long speed_ccb, temp, pixval;
speed_ccb = get_bus_freq(0) * 4;
temp = 1000000000/pixclock;
temp *= 1000;
pixval = speed_ccb / temp;
debug("DIU pixval = %lu\n", pixval);
/* Modify PXCLK in GUTS CLKDVDR */
debug("DIU: Current value of CLKDVDR = 0x%08x\n", in_be32(clkdvdr));
temp = in_be32(clkdvdr) & 0xFFFFFF00;
out_be32(clkdvdr, temp | (pixval & 0xFF));
debug("DIU: Modified value of CLKDVDR = 0x%08x\n", in_be32(clkdvdr));
}
int platform_diu_init(unsigned int *xres, unsigned int *yres)
{
unsigned int pixel_format;
#if defined(CONFIG_VIDEO_XRES) & defined(CONFIG_VIDEO_YRES)
*xres = CONFIG_VIDEO_XRES;
*yres = CONFIG_VIDEO_YRES;
#else
*xres = 1024;
*yres = 768;
#endif
pixel_format = 0x88883316;
debug("mpc5121_diu_init\n");
return fsl_diu_init(*xres, pixel_format, 0);
}
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