vid_mmsp2.c 4.8 KB

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  1. /*
  2. * (C) Gražvydas "notaz" Ignotas, 2006-2009,2013
  3. *
  4. * This work is licensed under the terms of any of these licenses
  5. * (at your option):
  6. * - GNU GPL, version 2 or later.
  7. * - GNU LGPL, version 2.1 or later.
  8. * - MAME license.
  9. * See the COPYING file in the top-level directory.
  10. */
  11. #include <stdio.h>
  12. #include <stdlib.h>
  13. #include <string.h>
  14. #include <linux/fb.h>
  15. #include <sys/mman.h>
  16. #include "../libpicofe/gp2x/plat_gp2x.h"
  17. #include "../libpicofe/gp2x/soc.h"
  18. #include "../common/arm_utils.h"
  19. #include "../common/emu.h"
  20. #include "plat.h"
  21. #define FRAMEBUFF_SIZE 0x30000
  22. #define FRAMEBUFF_WHOLESIZE (FRAMEBUFF_SIZE*4) // 320*240*2 + some more
  23. #define FRAMEBUFF_ADDR0 (0x4000000 - FRAMEBUFF_WHOLESIZE)
  24. #define FRAMEBUFF_ADDR1 (FRAMEBUFF_ADDR0 + FRAMEBUFF_SIZE)
  25. #define FRAMEBUFF_ADDR2 (FRAMEBUFF_ADDR1 + FRAMEBUFF_SIZE)
  26. #define FRAMEBUFF_ADDR3 (FRAMEBUFF_ADDR2 + FRAMEBUFF_SIZE)
  27. static const int gp2x_screenaddrs[4] = { FRAMEBUFF_ADDR0, FRAMEBUFF_ADDR1, FRAMEBUFF_ADDR2, FRAMEBUFF_ADDR3 };
  28. static int gp2x_screenaddrs_use[4];
  29. static unsigned short gp2x_screenaddr_old[4];
  30. static int screensel;
  31. static void gp2x_video_flip_(void)
  32. {
  33. unsigned short lsw = (unsigned short) gp2x_screenaddrs_use[screensel&3];
  34. unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&3] >> 16);
  35. memregs[0x2910>>1] = msw;
  36. memregs[0x2914>>1] = msw;
  37. memregs[0x290E>>1] = lsw;
  38. memregs[0x2912>>1] = lsw;
  39. // jump to other buffer:
  40. g_screen_ptr = gp2x_screens[++screensel&3];
  41. }
  42. /* doulblebuffered flip */
  43. static void gp2x_video_flip2_(void)
  44. {
  45. unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&1] >> 16);
  46. memregs[0x2910>>1] = msw;
  47. memregs[0x2914>>1] = msw;
  48. memregs[0x290E>>1] = 0;
  49. memregs[0x2912>>1] = 0;
  50. // jump to other buffer:
  51. g_screen_ptr = gp2x_screens[++screensel&1];
  52. }
  53. static void gp2x_video_changemode_ll_(int bpp)
  54. {
  55. printf("changemode %d\n", bpp);
  56. memregs[0x28DA>>1] = (((bpp+1)/8)<<9)|0xAB; /*8/15/16/24bpp...*/
  57. memregs[0x290C>>1] = 320*((bpp+1)/8); /*line width in bytes*/
  58. }
  59. static void gp2x_video_setpalette_(int *pal, int len)
  60. {
  61. unsigned short *g = (unsigned short *)pal;
  62. volatile unsigned short *memreg = &memregs[0x295A>>1];
  63. memregs[0x2958>>1] = 0;
  64. len *= 2;
  65. while (len--)
  66. *memreg = *g++;
  67. }
  68. static void gp2x_video_RGB_setscaling_(int ln_offs, int W, int H)
  69. {
  70. float escalaw, escalah;
  71. int bpp = (memregs[0x28DA>>1]>>9)&0x3;
  72. unsigned short scalw;
  73. // set offset
  74. gp2x_screenaddrs_use[0] = gp2x_screenaddrs[0] + ln_offs * 320 * bpp;
  75. gp2x_screenaddrs_use[1] = gp2x_screenaddrs[1] + ln_offs * 320 * bpp;
  76. gp2x_screenaddrs_use[2] = gp2x_screenaddrs[2] + ln_offs * 320 * bpp;
  77. gp2x_screenaddrs_use[3] = gp2x_screenaddrs[3] + ln_offs * 320 * bpp;
  78. escalaw = 1024.0; // RGB Horiz LCD
  79. escalah = 320.0; // RGB Vert LCD
  80. if (memregs[0x2800>>1]&0x100) //TV-Out
  81. {
  82. escalaw=489.0; // RGB Horiz TV (PAL, NTSC)
  83. if (memregs[0x2818>>1] == 287) //PAL
  84. escalah=274.0; // RGB Vert TV PAL
  85. else if (memregs[0x2818>>1] == 239) //NTSC
  86. escalah=331.0; // RGB Vert TV NTSC
  87. }
  88. // scale horizontal
  89. scalw = (unsigned short)((float)escalaw *(W/320.0));
  90. /* if there is no horizontal scaling, vertical doesn't work.
  91. * Here is a nasty wrokaround... */
  92. if (H != 240 && W == 320) scalw--;
  93. memregs[0x2906>>1]=scalw;
  94. // scale vertical
  95. memregl[0x2908>>2]=(unsigned long)((float)escalah *bpp *(H/240.0));
  96. }
  97. static void gp2x_video_wait_vsync_(void)
  98. {
  99. unsigned short v = memregs[0x1182>>1];
  100. while (!((v ^ memregs[0x1182>>1]) & 0x10))
  101. spend_cycles(1024);
  102. }
  103. void vid_mmsp2_init(void)
  104. {
  105. int i;
  106. gp2x_screens[0] = mmap(0, FRAMEBUFF_WHOLESIZE, PROT_WRITE, MAP_SHARED,
  107. memdev, gp2x_screenaddrs[0]);
  108. if (gp2x_screens[0] == MAP_FAILED)
  109. {
  110. perror("mmap(g_screen_ptr)");
  111. exit(1);
  112. }
  113. printf("framebuffers:\n");
  114. printf(" %08x -> %p\n", gp2x_screenaddrs[0], gp2x_screens[0]);
  115. for (i = 1; i < 4; i++)
  116. {
  117. gp2x_screens[i] = (char *) gp2x_screens[i - 1] + FRAMEBUFF_SIZE;
  118. printf(" %08x -> %p\n", gp2x_screenaddrs[i], gp2x_screens[i]);
  119. }
  120. g_screen_ptr = gp2x_screens[0];
  121. screensel = 0;
  122. gp2x_screenaddr_old[0] = memregs[0x290E>>1];
  123. gp2x_screenaddr_old[1] = memregs[0x2910>>1];
  124. gp2x_screenaddr_old[2] = memregs[0x2912>>1];
  125. gp2x_screenaddr_old[3] = memregs[0x2914>>1];
  126. memcpy(gp2x_screenaddrs_use, gp2x_screenaddrs, sizeof(gp2x_screenaddrs));
  127. gp2x_video_flip = gp2x_video_flip_;
  128. gp2x_video_flip2 = gp2x_video_flip2_;
  129. gp2x_video_changemode_ll = gp2x_video_changemode_ll_;
  130. gp2x_video_setpalette = gp2x_video_setpalette_;
  131. gp2x_video_RGB_setscaling = gp2x_video_RGB_setscaling_;
  132. gp2x_video_wait_vsync = gp2x_video_wait_vsync_;
  133. }
  134. void vid_mmsp2_finish(void)
  135. {
  136. gp2x_video_RGB_setscaling_(0, 320, 240);
  137. gp2x_video_changemode_ll_(16);
  138. memregs[0x290E>>1] = gp2x_screenaddr_old[0];
  139. memregs[0x2910>>1] = gp2x_screenaddr_old[1];
  140. memregs[0x2912>>1] = gp2x_screenaddr_old[2];
  141. memregs[0x2914>>1] = gp2x_screenaddr_old[3];
  142. munmap(gp2x_screens[0], FRAMEBUFF_WHOLESIZE);
  143. }