mb86r0xgdc.c
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/*
* (C) Copyright 2010
* Matthias Weisser <weisserm@arcor.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* mb86r0xgdc.c - Graphic interface for Fujitsu MB86R0x integrated graphic
* controller.
*/
#include <common.h>
#include <malloc.h>
#include <asm/io.h>
#include <asm/arch/hardware.h>
#include <video_fb.h>
#include "videomodes.h"
/*
* 4MB (at the end of system RAM)
*/
#define VIDEO_MEM_SIZE 0x400000
#define FB_SYNC_CLK_INV (1<<16) /* pixel clock inverted */
/*
* Graphic Device
*/
static GraphicDevice mb86r0x;
static void dsp_init(struct mb86r0x_gdc_dsp *dsp, char *modestr,
u32 *videomem)
{
struct ctfb_res_modes var_mode;
u32 dcm1, dcm2, dcm3;
u16 htp, hdp, hdb, hsp, vtr, vsp, vdp;
u8 hsw, vsw;
u32 l2m, l2em, l2oa0, l2da0, l2oa1, l2da1;
u16 l2dx, l2dy, l2wx, l2wy, l2ww, l2wh;
unsigned long div;
int bpp;
bpp = video_get_params(&var_mode, modestr);
if (bpp == 0) {
var_mode.xres = 640;
var_mode.yres = 480;
var_mode.pixclock = 39721; /* 25MHz */
var_mode.left_margin = 48;
var_mode.right_margin = 16;
var_mode.upper_margin = 33;
var_mode.lower_margin = 10;
var_mode.hsync_len = 96;
var_mode.vsync_len = 2;
var_mode.sync = 0;
var_mode.vmode = 0;
bpp = 15;
}
/* Fill memory with white */
memset(videomem, 0xFF, var_mode.xres * var_mode.yres * 2);
mb86r0x.winSizeX = var_mode.xres;
mb86r0x.winSizeY = var_mode.yres;
/* LCD base clock is ~ 660MHZ. We do calculations in kHz */
div = 660000 / (1000000000L / var_mode.pixclock);
if (div > 64)
div = 64;
if (0 == div)
div = 1;
dcm1 = (div - 1) << 8;
dcm2 = 0x00000000;
if (var_mode.sync & FB_SYNC_CLK_INV)
dcm3 = 0x00000100;
else
dcm3 = 0x00000000;
htp = var_mode.left_margin + var_mode.xres +
var_mode.hsync_len + var_mode.right_margin;
hdp = var_mode.xres;
hdb = var_mode.xres;
hsp = var_mode.xres + var_mode.right_margin;
hsw = var_mode.hsync_len;
vsw = var_mode.vsync_len;
vtr = var_mode.upper_margin + var_mode.yres +
var_mode.vsync_len + var_mode.lower_margin;
vsp = var_mode.yres + var_mode.lower_margin;
vdp = var_mode.yres;
l2m = ((var_mode.yres - 1) << (0)) |
(((var_mode.xres * 2) / 64) << (16)) |
((1) << (31));
l2em = (1 << 0) | (1 << 1);
l2oa0 = mb86r0x.frameAdrs;
l2da0 = mb86r0x.frameAdrs;
l2oa1 = mb86r0x.frameAdrs;
l2da1 = mb86r0x.frameAdrs;
l2dx = 0;
l2dy = 0;
l2wx = 0;
l2wy = 0;
l2ww = var_mode.xres;
l2wh = var_mode.yres - 1;
writel(dcm1, &dsp->dcm1);
writel(dcm2, &dsp->dcm2);
writel(dcm3, &dsp->dcm3);
writew(htp, &dsp->htp);
writew(hdp, &dsp->hdp);
writew(hdb, &dsp->hdb);
writew(hsp, &dsp->hsp);
writeb(hsw, &dsp->hsw);
writeb(vsw, &dsp->vsw);
writew(vtr, &dsp->vtr);
writew(vsp, &dsp->vsp);
writew(vdp, &dsp->vdp);
writel(l2m, &dsp->l2m);
writel(l2em, &dsp->l2em);
writel(l2oa0, &dsp->l2oa0);
writel(l2da0, &dsp->l2da0);
writel(l2oa1, &dsp->l2oa1);
writel(l2da1, &dsp->l2da1);
writew(l2dx, &dsp->l2dx);
writew(l2dy, &dsp->l2dy);
writew(l2wx, &dsp->l2wx);
writew(l2wy, &dsp->l2wy);
writew(l2ww, &dsp->l2ww);
writew(l2wh, &dsp->l2wh);
writel(dcm1 | (1 << 18) | (1 << 31), &dsp->dcm1);
}
void *video_hw_init(void)
{
struct mb86r0x_gdc *gdc = (struct mb86r0x_gdc *) MB86R0x_GDC_BASE;
GraphicDevice *pGD = &mb86r0x;
char *s;
u32 *vid;
memset(pGD, 0, sizeof(GraphicDevice));
pGD->gdfIndex = GDF_15BIT_555RGB;
pGD->gdfBytesPP = 2;
pGD->memSize = VIDEO_MEM_SIZE;
pGD->frameAdrs = PHYS_SDRAM + PHYS_SDRAM_SIZE - VIDEO_MEM_SIZE;
vid = (u32 *)pGD->frameAdrs;
s = getenv("videomode");
if (s != NULL)
dsp_init(&gdc->dsp0, s, vid);
s = getenv("videomode1");
if (s != NULL)
dsp_init(&gdc->dsp1, s, vid);
return pGD;
}