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  1. /*
  2.  * Copyright (c) 2006 Jakub Vana
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup ia32   
  30.  * @{
  31.  */
  32. /**
  33.  * @file
  34.  * @brief VESA frame buffer driver.
  35.  */
  36.  
  37. #ifdef CONFIG_FB
  38.  
  39. #include <genarch/fb/fb.h>
  40. #include <genarch/fb/visuals.h>
  41. #include <arch/drivers/vesa.h>
  42. #include <putchar.h>
  43. #include <mm/page.h>
  44. #include <mm/frame.h>
  45. #include <mm/as.h>
  46. #include <arch/mm/page.h>
  47. #include <synch/spinlock.h>
  48. #include <arch/asm.h>
  49. #include <arch/types.h>
  50. #include <memstr.h>
  51. #include <bitops.h>
  52.  
  53. uint32_t vesa_ph_addr;
  54. uint16_t vesa_width;
  55. uint16_t vesa_height;
  56. uint16_t vesa_bpp;
  57. uint16_t vesa_scanline;
  58.  
  59. uint8_t vesa_red_mask;
  60. uint8_t vesa_red_pos;
  61.  
  62. uint8_t vesa_green_mask;
  63. uint8_t vesa_green_pos;
  64.  
  65. uint8_t vesa_blue_mask;
  66. uint8_t vesa_blue_pos;
  67.  
  68. int vesa_present(void)
  69. {
  70.     if ((vesa_width != 0xffff) && (vesa_height != 0xffff))
  71.         return true;
  72.    
  73.     return false;
  74. }
  75.  
  76. void vesa_init(void)
  77. {
  78.     unsigned int visual;
  79.    
  80.     switch (vesa_bpp) {
  81.     case 8:
  82.         visual = VISUAL_INDIRECT_8;
  83.         break;
  84.     case 16:
  85.         if ((vesa_red_mask == 5) && (vesa_red_pos == 10)
  86.             && (vesa_green_mask == 5) && (vesa_green_pos == 5)
  87.             && (vesa_blue_mask == 5) && (vesa_blue_pos == 0))
  88.             visual = VISUAL_RGB_5_5_5;
  89.         else
  90.             visual = VISUAL_RGB_5_6_5;
  91.         break;
  92.     case 24:
  93.         visual = VISUAL_RGB_8_8_8;
  94.         break;
  95.     case 32:
  96.         visual = VISUAL_RGB_0_8_8_8;
  97.         break;
  98.     default:
  99.         panic("Unsupported bits per pixel.");
  100.     }
  101.    
  102.     fb_properties_t vesa_props = {
  103.         .addr = vesa_ph_addr,
  104.         .offset = 0,
  105.         .x = vesa_width,
  106.         .y = vesa_height,
  107.         .scan = vesa_scanline,
  108.         .visual = visual,
  109.     };
  110.     fb_init(&vesa_props);
  111. }
  112.  
  113. void vesa_redraw(void)
  114. {
  115.     fb_redraw();
  116. }
  117.  
  118. #endif
  119.  
  120. /** @}
  121.  */
  122.