u-boot/arch/powerpc/cpu/mpc512x/diu.c

/*
 * 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 "../../../../board/freescale/common/fsl_diu_fb.h"

#if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
#include <stdio_dev.h>
#include <video_fb.h>
#endif

DECLARE_GLOBAL_DATA_PTR;

static int xres, yres;

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 mpc5121_diu_init(void)
{
	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);
}

#if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)

/*
 * The Graphic Device
 */
GraphicDevice ctfb;
void *video_hw_init(void)
{
	GraphicDevice *pGD = (GraphicDevice *) &ctfb;
	struct fb_info *info;

	if (mpc5121_diu_init() < 0)
		return NULL;

	/* fill in Graphic device struct */
	sprintf(pGD->modeIdent, "%dx%dx%d %dkHz %dHz",
		xres, yres, 32, 64, 60);

	pGD->frameAdrs = (unsigned int)fsl_fb_open(&info);
	pGD->winSizeX = xres;
	pGD->winSizeY = yres;
	pGD->plnSizeX = pGD->winSizeX;
	pGD->plnSizeY = pGD->winSizeY;

	pGD->gdfBytesPP = 4;
	pGD->gdfIndex = GDF_32BIT_X888RGB;

	pGD->isaBase = 0;
	pGD->pciBase = 0;
	pGD->memSize = info->screen_size;

	/* Cursor Start Address */
	pGD->dprBase = 0;
	pGD->vprBase = 0;
	pGD->cprBase = 0;

	return (void *)pGD;
}

#endif /* defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE) */