vid_pollux.c 5.0 KB

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  1. /*
  2. * (C) Gražvydas "notaz" Ignotas, 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. * <random_info=mem_map>
  12. * 00000000-029fffff linux (42MB)
  13. * 02a00000-02dfffff fb (4MB, 153600B really used)
  14. * 02e00000-02ffffff sound dma (2MB)
  15. * 03000000-03ffffff MPEGDEC (?, 16MB)
  16. * </random_info>
  17. */
  18. #include <stdio.h>
  19. #include <stdlib.h>
  20. #include <string.h>
  21. #include <sys/types.h>
  22. #include <sys/stat.h>
  23. #include <fcntl.h>
  24. #include <sys/ioctl.h>
  25. #include <sys/mman.h>
  26. #include <linux/fb.h>
  27. #include <unistd.h>
  28. #include "../libpicofe/gp2x/soc.h"
  29. #include "../libpicofe/gp2x/plat_gp2x.h"
  30. #include "../libpicofe/gp2x/pollux_set.h"
  31. #include "../common/emu.h"
  32. #include "../common/arm_utils.h"
  33. #include "plat.h"
  34. #define fb_buf_count 4
  35. static unsigned int fb_paddr[fb_buf_count];
  36. static int fb_work_buf;
  37. static int fbdev = -1;
  38. static unsigned short memtimex_old[2];
  39. static int last_pal_setting = 0;
  40. /* misc */
  41. static void pollux_set_fromenv(const char *env_var)
  42. {
  43. const char *set_string;
  44. set_string = getenv(env_var);
  45. if (set_string)
  46. pollux_set(memregs, set_string);
  47. else
  48. printf("env var %s not defined.\n", env_var);
  49. }
  50. /* video stuff */
  51. static void pollux_video_flip(int buf_count)
  52. {
  53. memregl[0x406C>>2] = fb_paddr[fb_work_buf];
  54. memregl[0x4058>>2] |= 0x10;
  55. fb_work_buf++;
  56. if (fb_work_buf >= buf_count)
  57. fb_work_buf = 0;
  58. g_screen_ptr = gp2x_screens[fb_work_buf];
  59. }
  60. static void gp2x_video_flip_(void)
  61. {
  62. pollux_video_flip(fb_buf_count);
  63. }
  64. /* doulblebuffered flip */
  65. static void gp2x_video_flip2_(void)
  66. {
  67. pollux_video_flip(2);
  68. }
  69. static void gp2x_video_changemode_ll_(int bpp)
  70. {
  71. static int prev_bpp = 0;
  72. int code = 0, bytes = 2;
  73. int rot_cmd[2] = { 0, 0 };
  74. unsigned int r;
  75. char buff[32];
  76. int ret;
  77. if (bpp == prev_bpp)
  78. return;
  79. prev_bpp = bpp;
  80. printf("changemode: %dbpp rot=%d\n", abs(bpp), bpp < 0);
  81. /* negative bpp means rotated mode */
  82. rot_cmd[0] = (bpp < 0) ? 6 : 5;
  83. ret = ioctl(fbdev, _IOW('D', 90, int[2]), rot_cmd);
  84. if (ret < 0)
  85. perror("rot ioctl failed");
  86. memregl[0x4004>>2] = (bpp < 0) ? 0x013f00ef : 0x00ef013f;
  87. memregl[0x4000>>2] |= 1 << 3;
  88. /* the above ioctl resets LCD timings, so set them here */
  89. snprintf(buff, sizeof(buff), "POLLUX_LCD_TIMINGS_%s", last_pal_setting ? "PAL" : "NTSC");
  90. pollux_set_fromenv(buff);
  91. switch (abs(bpp))
  92. {
  93. case 8:
  94. code = 0x443a;
  95. bytes = 1;
  96. break;
  97. case 15:
  98. case 16:
  99. code = 0x4432;
  100. bytes = 2;
  101. break;
  102. default:
  103. printf("unhandled bpp request: %d\n", abs(bpp));
  104. return;
  105. }
  106. memregl[0x405c>>2] = bytes;
  107. memregl[0x4060>>2] = bytes * (bpp < 0 ? 240 : 320);
  108. r = memregl[0x4058>>2];
  109. r = (r & 0xffff) | (code << 16) | 0x10;
  110. memregl[0x4058>>2] = r;
  111. }
  112. static void gp2x_video_setpalette_(int *pal, int len)
  113. {
  114. /* pollux palette is 16bpp only.. */
  115. int i;
  116. for (i = 0; i < len; i++)
  117. {
  118. int c = pal[i];
  119. c = ((c >> 8) & 0xf800) | ((c >> 5) & 0x07c0) | ((c >> 3) & 0x001f);
  120. memregl[0x4070>>2] = (i << 24) | c;
  121. }
  122. }
  123. static void gp2x_video_RGB_setscaling_(int ln_offs, int W, int H)
  124. {
  125. /* maybe a job for 3d hardware? */
  126. }
  127. static void gp2x_video_wait_vsync_(void)
  128. {
  129. while (!(memregl[0x308c>>2] & (1 << 10)))
  130. spend_cycles(128);
  131. memregl[0x308c>>2] |= 1 << 10;
  132. }
  133. /* RAM timings */
  134. static void set_ram_timings_(void)
  135. {
  136. pollux_set_fromenv("POLLUX_RAM_TIMINGS");
  137. }
  138. static void unset_ram_timings_(void)
  139. {
  140. int i;
  141. memregs[0x14802>>1] = memtimex_old[0];
  142. memregs[0x14804>>1] = memtimex_old[1] | 0x8000;
  143. for (i = 0; i < 0x100000; i++)
  144. if (!(memregs[0x14804>>1] & 0x8000))
  145. break;
  146. printf("RAM timings reset to startup values.\n");
  147. }
  148. void vid_pollux_init(void)
  149. {
  150. struct fb_fix_screeninfo fbfix;
  151. int i, ret;
  152. fbdev = open("/dev/fb0", O_RDWR);
  153. if (fbdev < 0) {
  154. perror("can't open fbdev");
  155. exit(1);
  156. }
  157. ret = ioctl(fbdev, FBIOGET_FSCREENINFO, &fbfix);
  158. if (ret == -1) {
  159. perror("ioctl(fbdev) failed");
  160. exit(1);
  161. }
  162. printf("framebuffer: \"%s\" @ %08lx\n", fbfix.id, fbfix.smem_start);
  163. fb_paddr[0] = fbfix.smem_start;
  164. gp2x_screens[0] = mmap(0, 320*240*2*fb_buf_count, PROT_READ|PROT_WRITE,
  165. MAP_SHARED, memdev, fb_paddr[0]);
  166. if (gp2x_screens[0] == MAP_FAILED)
  167. {
  168. perror("mmap(gp2x_screens) failed");
  169. exit(1);
  170. }
  171. memset(gp2x_screens[0], 0, 320*240*2*fb_buf_count);
  172. printf(" %p -> %08x\n", gp2x_screens[0], fb_paddr[0]);
  173. for (i = 1; i < fb_buf_count; i++)
  174. {
  175. fb_paddr[i] = fb_paddr[i-1] + 320*240*2;
  176. gp2x_screens[i] = (char *)gp2x_screens[i-1] + 320*240*2;
  177. printf(" %p -> %08x\n", gp2x_screens[i], fb_paddr[i]);
  178. }
  179. fb_work_buf = 0;
  180. g_screen_ptr = gp2x_screens[0];
  181. set_ram_timings_();
  182. gp2x_video_flip = gp2x_video_flip_;
  183. gp2x_video_flip2 = gp2x_video_flip2_;
  184. gp2x_video_changemode_ll = gp2x_video_changemode_ll_;
  185. gp2x_video_setpalette = gp2x_video_setpalette_;
  186. gp2x_video_RGB_setscaling = gp2x_video_RGB_setscaling_;
  187. gp2x_video_wait_vsync = gp2x_video_wait_vsync_;
  188. }
  189. void vid_pollux_finish(void)
  190. {
  191. munmap(gp2x_screens[0], 320*240*2 * fb_buf_count);
  192. close(fbdev);
  193. fbdev = -1;
  194. unset_ram_timings_();
  195. }