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1287 vana 1
/*
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 * Copyright (c) 2006 Jakub Vana
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup ia32   
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 * @{
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 */
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/**
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 * @file
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 * @brief VESA frame buffer driver.
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 */
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#ifdef CONFIG_FB
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#include <genarch/fb/fb.h>
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#include <genarch/fb/visuals.h>
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#include <arch/drivers/vesa.h>
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#include <putchar.h>
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#include <mm/page.h>
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#include <mm/frame.h>
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#include <mm/as.h>
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#include <arch/mm/page.h>
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#include <synch/spinlock.h>
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#include <arch/asm.h>
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#include <arch/types.h>
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#include <memstr.h>
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#include <bitops.h>
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uint32_t vesa_ph_addr;
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uint16_t vesa_width;
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uint16_t vesa_height;
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uint16_t vesa_bpp;
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uint16_t vesa_scanline;
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uint8_t vesa_red_mask;
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uint8_t vesa_red_pos;
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uint8_t vesa_green_mask;
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uint8_t vesa_green_pos;
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uint8_t vesa_blue_mask;
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uint8_t vesa_blue_pos;
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int vesa_present(void)
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{
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    if ((vesa_width != 0xffff) && (vesa_height != 0xffff))
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        return true;
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    return false;
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}
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void vesa_init(void)
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{
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    unsigned int visual;
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    switch (vesa_bpp) {
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    case 8:
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        visual = VISUAL_INDIRECT_8;
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        break;
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    case 16:
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        if ((vesa_red_mask == 5) && (vesa_red_pos == 10)
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            && (vesa_green_mask == 5) && (vesa_green_pos == 5)
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            && (vesa_blue_mask == 5) && (vesa_blue_pos == 0))
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            visual = VISUAL_RGB_5_5_5;
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        else
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            visual = VISUAL_RGB_5_6_5;
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        break;
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    case 24:
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        visual = VISUAL_RGB_8_8_8;
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        break;
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    case 32:
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        visual = VISUAL_RGB_0_8_8_8;
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        break;
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    default:
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        panic("Unsupported bits per pixel.");
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    }
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    fb_properties_t vesa_props = {
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        .addr = vesa_ph_addr,
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        .offset = 0,
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        .x = vesa_width,
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        .y = vesa_height,
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        .scan = vesa_scanline,
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        .visual = visual,
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    };
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    fb_init(&vesa_props);
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}
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void vesa_redraw(void)
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{
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    fb_redraw();
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}
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#endif
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/** @}
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 */