91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
/*
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Copyright (C) 2012, Aaron Lindsay <aaron@aclindsay.com>
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This file is part of Aedrix.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <types.h>
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#include <framebuffer.h>
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#include <frames.h>
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#include <math.h>
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#define PL110_CR_EN 0x001
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#define PL110_CR_PWR 0x800
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#define PL110_IOBASE 0xc0000000
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#define PL110_PALBASE (PL110_IOBASE + 0x200)
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struct pl110_control {
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uint32 volatile timing0; //0
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uint32 volatile timing1; //4
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uint32 volatile timing2; //8
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uint32 volatile timing3; //c
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uint32 volatile upbase; //10
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uint32 volatile lpbase; //14
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uint32 volatile intrenable; //18
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uint32 volatile control; //1c
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};
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struct fbdev pl110_fb_device;
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int pl110_init(struct fb *f, unsigned int color_depth) {
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unsigned int width, height;
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unsigned int fb_size, power;
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struct pl110_control *plio = (struct pl110_control*)PL110_IOBASE;
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struct frame *fr;
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/* 640x480 pixels */
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width = 640;
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height = 480;
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plio->timing0 = 0x3f1f3f9c;
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plio->timing1 = 0x080b61df;
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/* Allocate memory for framebuffer */
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fb_size = width * height * (color_depth / 8);
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power = log(fb_size) - log(CONFIG_PAGE_SIZE);
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if ((unsigned int)1<<power < fb_size)
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power++;
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fr = get_free_frames(power);
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if (!fr)
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return -1;
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plio->upbase = (uint32)fr->address;
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if (color_depth == FB_COLOR_DEPTH_8) {
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plio->control = 0x1827;
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} else if (color_depth == FB_COLOR_DEPTH_16) {
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plio->control = 0x1829;
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} else if (color_depth == FB_COLOR_DEPTH_24) {
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plio->control = 0x182B;
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} else {
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//assume 16 if nothing else fit
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color_depth = 16;
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plio->control = 0x1829;
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}
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f->device = &pl110_fb_device;
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f->device->fbaddr = (void*)plio->upbase;
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f->width = width;
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f->device->pixelwidth = width;
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f->height = height;
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f->device->pixelheight = height;
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f->color_depth = color_depth;
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f->device->color_depth = color_depth;
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return 0;
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}
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