3adc9ccb |
1 | #include <stdio.h> |
2 | #include <stdlib.h> |
3 | #include <string.h> |
4 | #include <sys/types.h> |
5 | #include <sys/stat.h> |
6 | #include <fcntl.h> |
7 | #include <sys/ioctl.h> |
8 | #include <sys/mman.h> |
9 | #include <unistd.h> |
10 | #include <linux/fb.h> |
11 | |
12 | static volatile unsigned short *memregs; |
13 | static volatile unsigned long *memregl; |
14 | static int memdev = -1; |
15 | |
16 | #define FB_BUF_COUNT 4 |
17 | static unsigned int fb_paddr[FB_BUF_COUNT]; |
18 | static int fb_work_buf; |
19 | static int fbdev = -1; |
20 | |
21 | static void *gp2x_screens[FB_BUF_COUNT]; |
22 | static void *g_screen_ptr; |
23 | |
24 | |
25 | static void vout_gp2x_flip(void) |
26 | { |
27 | memregl[0x406C>>2] = fb_paddr[fb_work_buf]; |
28 | memregl[0x4058>>2] |= 0x10; |
29 | |
30 | fb_work_buf++; |
31 | if (fb_work_buf >= FB_BUF_COUNT) |
32 | fb_work_buf = 0; |
33 | g_screen_ptr = gp2x_screens[fb_work_buf]; |
34 | } |
35 | |
36 | static int vout_gp2x_init(void) |
37 | { |
38 | struct fb_fix_screeninfo fbfix; |
39 | int i, ret; |
40 | |
41 | memdev = open("/dev/mem", O_RDWR); |
42 | if (memdev == -1) { |
43 | perror("open(/dev/mem) failed"); |
44 | exit(1); |
45 | } |
46 | |
47 | memregs = mmap(0, 0x20000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000); |
48 | if (memregs == MAP_FAILED) { |
49 | perror("mmap(memregs) failed"); |
50 | exit(1); |
51 | } |
52 | memregl = (volatile void *)memregs; |
53 | |
54 | fbdev = open("/dev/fb0", O_RDWR); |
55 | if (fbdev < 0) { |
56 | perror("can't open fbdev"); |
57 | exit(1); |
58 | } |
59 | |
60 | ret = ioctl(fbdev, FBIOGET_FSCREENINFO, &fbfix); |
61 | if (ret == -1) { |
62 | perror("ioctl(fbdev) failed"); |
63 | exit(1); |
64 | } |
65 | |
66 | printf("framebuffer: \"%s\" @ %08lx\n", fbfix.id, fbfix.smem_start); |
67 | fb_paddr[0] = fbfix.smem_start; |
68 | |
69 | gp2x_screens[0] = mmap(0, 320*240*2*FB_BUF_COUNT, PROT_READ|PROT_WRITE, |
70 | MAP_SHARED, memdev, fb_paddr[0]); |
71 | if (gp2x_screens[0] == MAP_FAILED) |
72 | { |
73 | perror("mmap(gp2x_screens) failed"); |
74 | exit(1); |
75 | } |
76 | memset(gp2x_screens[0], 0, 320*240*2*FB_BUF_COUNT); |
77 | |
78 | printf(" %p -> %08x\n", gp2x_screens[0], fb_paddr[0]); |
79 | for (i = 1; i < FB_BUF_COUNT; i++) |
80 | { |
81 | fb_paddr[i] = fb_paddr[i-1] + 320*240*2; |
82 | gp2x_screens[i] = (char *)gp2x_screens[i-1] + 320*240*2; |
83 | printf(" %p -> %08x\n", gp2x_screens[i], fb_paddr[i]); |
84 | } |
85 | fb_work_buf = 0; |
86 | g_screen_ptr = gp2x_screens[0]; |
87 | |
88 | return 0; |
89 | } |
90 | |
91 | void vout_gp2x_finish(void) |
92 | { |
93 | memregl[0x406C>>2] = fb_paddr[0]; |
94 | memregl[0x4058>>2] |= 0x10; |
95 | close(fbdev); |
96 | |
97 | munmap((void *)memregs, 0x20000); |
98 | close(memdev); |
99 | } |
100 | |