| 1 | /* |
| 2 | * GINGE - GINGE Is Not Gp2x Emulator |
| 3 | * (C) notaz, 2010-2011 |
| 4 | * |
| 5 | * This work is licensed under the MAME license, see COPYING file for details. |
| 6 | */ |
| 7 | #include <stdio.h> |
| 8 | #include <stdlib.h> |
| 9 | #include <string.h> |
| 10 | #include <sys/types.h> |
| 11 | #include <sys/stat.h> |
| 12 | #include <fcntl.h> |
| 13 | #include <sys/ioctl.h> |
| 14 | #include <sys/mman.h> |
| 15 | #include <unistd.h> |
| 16 | #include <linux/fb.h> |
| 17 | #include "warm/warm.h" |
| 18 | |
| 19 | static volatile unsigned short *memregs; |
| 20 | static volatile unsigned int *memregl; |
| 21 | int probably_caanoo; |
| 22 | int memdev = -1; |
| 23 | |
| 24 | #define FB_BUF_COUNT 4 |
| 25 | static unsigned int fb_paddr[FB_BUF_COUNT]; |
| 26 | static int fb_buf_count = FB_BUF_COUNT; |
| 27 | static int fb_work_buf; |
| 28 | static int fbdev = -1; |
| 29 | |
| 30 | static void *gp2x_screens[FB_BUF_COUNT]; |
| 31 | static void *g_screen_ptr; |
| 32 | |
| 33 | |
| 34 | static void vout_gp2x_flip(void) |
| 35 | { |
| 36 | memregl[0x406C>>2] = fb_paddr[fb_work_buf]; |
| 37 | memregl[0x4058>>2] |= 0x10; |
| 38 | |
| 39 | fb_work_buf++; |
| 40 | if (fb_work_buf >= fb_buf_count) |
| 41 | fb_work_buf = 0; |
| 42 | g_screen_ptr = gp2x_screens[fb_work_buf]; |
| 43 | } |
| 44 | |
| 45 | static int vout_gp2x_init(int no_dblbuf) |
| 46 | { |
| 47 | struct fb_fix_screeninfo fbfix; |
| 48 | int i, ret; |
| 49 | |
| 50 | memdev = open("/dev/mem", O_RDWR); |
| 51 | if (memdev == -1) { |
| 52 | perror("open(/dev/mem) failed"); |
| 53 | exit(1); |
| 54 | } |
| 55 | |
| 56 | memregs = mmap(0, 0x20000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000); |
| 57 | if (memregs == MAP_FAILED) { |
| 58 | perror("mmap(memregs) failed"); |
| 59 | exit(1); |
| 60 | } |
| 61 | memregl = (volatile void *)memregs; |
| 62 | |
| 63 | fbdev = open("/dev/fb0", O_RDWR); |
| 64 | if (fbdev < 0) { |
| 65 | perror("can't open fbdev"); |
| 66 | exit(1); |
| 67 | } |
| 68 | |
| 69 | ret = ioctl(fbdev, FBIOGET_FSCREENINFO, &fbfix); |
| 70 | if (ret == -1) { |
| 71 | perror("ioctl(fbdev) failed"); |
| 72 | exit(1); |
| 73 | } |
| 74 | |
| 75 | printf("framebuffer: \"%s\" @ %08lx\n", fbfix.id, fbfix.smem_start); |
| 76 | fb_paddr[0] = fbfix.smem_start; |
| 77 | probably_caanoo = fb_paddr[0] >= 0x4000000; |
| 78 | printf("looking like Caanoo? %s.\n", probably_caanoo ? "yes" : "no"); |
| 79 | |
| 80 | gp2x_screens[0] = mmap(0, 320*240*2*FB_BUF_COUNT, PROT_READ|PROT_WRITE, |
| 81 | MAP_SHARED, memdev, fb_paddr[0]); |
| 82 | if (gp2x_screens[0] == MAP_FAILED) |
| 83 | { |
| 84 | perror("mmap(gp2x_screens) failed"); |
| 85 | exit(1); |
| 86 | } |
| 87 | memset(gp2x_screens[0], 0, 320*240*2*FB_BUF_COUNT); |
| 88 | |
| 89 | if (!no_dblbuf) { |
| 90 | warm_init(); |
| 91 | ret = warm_change_cb_range(WCB_B_BIT, 1, gp2x_screens[0], 320*240*2*FB_BUF_COUNT); |
| 92 | if (ret != 0) |
| 93 | fprintf(stderr, "could not make fb buferable.\n"); |
| 94 | } |
| 95 | |
| 96 | // printf(" %p -> %08x\n", gp2x_screens[0], fb_paddr[0]); |
| 97 | for (i = 1; i < FB_BUF_COUNT; i++) |
| 98 | { |
| 99 | fb_paddr[i] = fb_paddr[i-1] + 320*240*2; |
| 100 | gp2x_screens[i] = (char *)gp2x_screens[i-1] + 320*240*2; |
| 101 | // printf(" %p -> %08x\n", gp2x_screens[i], fb_paddr[i]); |
| 102 | } |
| 103 | fb_work_buf = 0; |
| 104 | g_screen_ptr = gp2x_screens[0]; |
| 105 | |
| 106 | if (no_dblbuf) |
| 107 | fb_buf_count = 1; |
| 108 | |
| 109 | return 0; |
| 110 | } |
| 111 | |
| 112 | static void vout_gp2x_set_mode(int bpp, int rot) |
| 113 | { |
| 114 | int rot_cmd[2] = { 0, 0 }; |
| 115 | int code = 0, bytes = 2; |
| 116 | unsigned int r; |
| 117 | int ret; |
| 118 | |
| 119 | if (probably_caanoo) |
| 120 | rot = 0; |
| 121 | |
| 122 | rot_cmd[0] = rot ? 6 : 5; |
| 123 | ret = ioctl(fbdev, _IOW('D', 90, int[2]), rot_cmd); |
| 124 | if (ret < 0) |
| 125 | perror("rot ioctl failed"); |
| 126 | |
| 127 | memregl[0x4004>>2] = rot ? 0x013f00ef : 0x00ef013f; |
| 128 | memregl[0x4000>>2] |= 1 << 3; |
| 129 | |
| 130 | switch (bpp) |
| 131 | { |
| 132 | case 8: |
| 133 | code = 0x443a; |
| 134 | bytes = 1; |
| 135 | break; |
| 136 | |
| 137 | case 15: |
| 138 | case 16: |
| 139 | code = 0x4432; |
| 140 | bytes = 2; |
| 141 | break; |
| 142 | |
| 143 | default: |
| 144 | fprintf(stderr, "unhandled bpp request: %d\n", abs(bpp)); |
| 145 | return; |
| 146 | } |
| 147 | |
| 148 | memregl[0x405c>>2] = bytes; |
| 149 | memregl[0x4060>>2] = bytes * (rot ? 240 : 320); |
| 150 | |
| 151 | r = memregl[0x4058>>2]; |
| 152 | r = (r & 0xffff) | (code << 16) | 0x10; |
| 153 | memregl[0x4058>>2] = r; |
| 154 | } |
| 155 | |
| 156 | static void vout_gp2x_set_palette16(unsigned short *pal, int len) |
| 157 | { |
| 158 | int i; |
| 159 | for (i = 0; i < len; i++) |
| 160 | memregl[0x4070>>2] = (i << 24) | pal[i]; |
| 161 | } |
| 162 | |
| 163 | static void vout_gp2x_set_palette32(unsigned int *pal, int len) |
| 164 | { |
| 165 | /* pollux palette is 16bpp only.. */ |
| 166 | int i; |
| 167 | for (i = 0; i < len; i++) |
| 168 | { |
| 169 | int c = pal[i]; |
| 170 | c = ((c >> 8) & 0xf800) | ((c >> 5) & 0x07c0) | ((c >> 3) & 0x001f); |
| 171 | memregl[0x4070>>2] = (i << 24) | c; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | void vout_gp2x_finish(void) |
| 176 | { |
| 177 | if (memregl != NULL) { |
| 178 | if (memregl[0x4058>>2] & 0x10) |
| 179 | usleep(100000); |
| 180 | if (memregl[0x4058>>2] & 0x10) |
| 181 | printf("MLCCONTROL1 dirty? %08x %08x\n", |
| 182 | memregl[0x406C>>2], memregl[0x4058>>2]); |
| 183 | |
| 184 | memregl[0x406C>>2] = fb_paddr[0]; |
| 185 | memregl[0x4058>>2] |= 0x10; |
| 186 | munmap((void *)memregs, 0x20000); |
| 187 | memregs = NULL; |
| 188 | memregl = NULL; |
| 189 | } |
| 190 | |
| 191 | close(fbdev); |
| 192 | close(memdev); |
| 193 | |
| 194 | warm_finish(); |
| 195 | } |
| 196 | |