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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. int vesa_present(void)
  60. {
  61.     if (vesa_width != 0xffff)
  62.         return true;
  63.     if (vesa_height != 0xffff)
  64.         return true;
  65.     return false;
  66. }
  67.  
  68. void vesa_init(void)
  69. {
  70.     unsigned int visual;
  71.    
  72.     switch (vesa_bpp) {
  73.     case 8:
  74.         visual = VISUAL_INDIRECT_8;
  75.         break;
  76.     case 16:
  77.         visual = VISUAL_RGB_5_6_5;
  78.         break;
  79.     case 24:
  80.         visual = VISUAL_RGB_8_8_8;
  81.         break;
  82.     case 32:
  83.         visual = VISUAL_RGB_0_8_8_8;
  84.         break;
  85.     default:
  86.         panic("Unsupported bits per pixel");
  87.     }
  88.    
  89.     fb_properties_t vesa_props = {
  90.         .addr = vesa_ph_addr,
  91.         .offset = 0,
  92.         .x = vesa_width,
  93.         .y = vesa_height,
  94.         .scan = vesa_scanline,
  95.         .visual = visual,
  96.     };
  97.     fb_init(&vesa_props);
  98. }
  99.  
  100. #endif
  101.  
  102. /** @}
  103.  */
  104.