| 1 | /* |
| 2 | * quick tool to set LCD timings for Wiz |
| 3 | * (c) notaz, 2009 |
| 4 | * code dedicated to public domain. |
| 5 | * |
| 6 | * HTOTAL: X VTOTAL: 341 |
| 7 | * HSWIDTH: 1 VSWIDTH: 0 |
| 8 | * HASTART: 37 VASTART: 17 |
| 9 | * HAEND: 277 VAEND: 337 |
| 10 | * |
| 11 | * 120Hz |
| 12 | * pcd 8, 447: + 594us |
| 13 | * pcd 9, 397: + 36us |
| 14 | * pcd 10, 357: - 523us |
| 15 | * pcd 11, 325: +1153us |
| 16 | * |
| 17 | * 'lcd_timings=397,1,37,277,341,0,17,337;clkdiv0=9' |
| 18 | */ |
| 19 | |
| 20 | #include <stdio.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <string.h> |
| 23 | #include "pollux_dpc_set.h" |
| 24 | |
| 25 | /* |
| 26 | * set LCD timings based on preformated string (see usage() below for params). |
| 27 | * returns 0 on success. |
| 28 | */ |
| 29 | int pollux_dpc_set(volatile unsigned short *memregs, const char *str) |
| 30 | { |
| 31 | int timings[8], have_timings = 0; |
| 32 | int pcd = 0, have_pcd = 0; |
| 33 | const char *p; |
| 34 | int i, ret; |
| 35 | |
| 36 | if (str == NULL) |
| 37 | return -1; |
| 38 | |
| 39 | p = str; |
| 40 | while (1) |
| 41 | { |
| 42 | if (strncmp(p, "lcd_timings=", 12) == 0) |
| 43 | { |
| 44 | int c; |
| 45 | p += 12; |
| 46 | ret = sscanf(p, "%d,%d,%d,%d,%d,%d,%d,%d", |
| 47 | &timings[0], &timings[1], &timings[2], &timings[3], |
| 48 | &timings[4], &timings[5], &timings[6], &timings[7]); |
| 49 | if (ret != 8) |
| 50 | break; |
| 51 | /* skip seven commas */ |
| 52 | for (c = 0; c < 7 && *p != 0; p++) |
| 53 | if (*p == ',') |
| 54 | c++; |
| 55 | if (c != 7) |
| 56 | break; |
| 57 | /* skip last number */ |
| 58 | while ('0' <= *p && *p <= '9') |
| 59 | p++; |
| 60 | have_timings = 1; |
| 61 | } |
| 62 | else if (strncmp(p, "clkdiv0=", 8) == 0) |
| 63 | { |
| 64 | char *ep; |
| 65 | p += 8; |
| 66 | pcd = strtoul(p, &ep, 10); |
| 67 | if (p == ep) |
| 68 | break; |
| 69 | p = ep; |
| 70 | have_pcd = 1; |
| 71 | } |
| 72 | else |
| 73 | break; |
| 74 | |
| 75 | while (*p == ';' || *p == ' ') |
| 76 | p++; |
| 77 | if (*p == 0) |
| 78 | goto parse_done; |
| 79 | } |
| 80 | |
| 81 | fprintf(stderr, "dpc_set parser: error at '%s'\n", p); |
| 82 | return -1; |
| 83 | |
| 84 | parse_done: |
| 85 | /* some validation */ |
| 86 | if (have_timings) |
| 87 | { |
| 88 | for (i = 0; i < 8; i++) |
| 89 | if (timings[i] & ~0xffff) { |
| 90 | fprintf(stderr, "dpc_set: invalid timing %d: %d\n", i, timings[i]); |
| 91 | return -1; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | if (have_pcd) |
| 96 | { |
| 97 | if ((pcd - 1) & ~0x3f) { |
| 98 | fprintf(stderr, "dpc_set: invalid clkdiv0: %d\n", pcd); |
| 99 | return -1; |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | /* write */ |
| 104 | if (have_timings) |
| 105 | { |
| 106 | for (i = 0; i < 8; i++) |
| 107 | memregs[(0x307c>>1) + i] = timings[i]; |
| 108 | } |
| 109 | |
| 110 | if (have_pcd) |
| 111 | { |
| 112 | int tmp; |
| 113 | pcd = (pcd - 1) & 0x3f; |
| 114 | tmp = memregs[0x31c4>>1]; |
| 115 | memregs[0x31c4>>1] = (tmp & ~0x3f0) | (pcd << 4); |
| 116 | } |
| 117 | |
| 118 | return 0; |
| 119 | } |
| 120 | |
| 121 | #ifdef BINARY |
| 122 | #include <sys/types.h> |
| 123 | #include <sys/stat.h> |
| 124 | #include <fcntl.h> |
| 125 | #include <sys/mman.h> |
| 126 | #include <unistd.h> |
| 127 | |
| 128 | static void usage(const char *binary) |
| 129 | { |
| 130 | printf("usage:\n%s <set_str[;set_str[;...]]>\n" |
| 131 | "set_str:\n" |
| 132 | " lcd_timings=<htotal,hswidth,hastart,haend,vtotal,vswidth,vastart,vaend>\n" |
| 133 | " clkdiv0=<divider>\n", binary); |
| 134 | } |
| 135 | |
| 136 | int main(int argc, char *argv[]) |
| 137 | { |
| 138 | volatile unsigned short *memregs; |
| 139 | int ret, memdev; |
| 140 | |
| 141 | if (argc != 2) { |
| 142 | usage(argv[0]); |
| 143 | return 1; |
| 144 | } |
| 145 | |
| 146 | memdev = open("/dev/mem", O_RDWR); |
| 147 | if (memdev == -1) |
| 148 | { |
| 149 | perror("open(/dev/mem) failed"); |
| 150 | return 1; |
| 151 | } |
| 152 | |
| 153 | memregs = mmap(0, 0x10000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000); |
| 154 | if (memregs == MAP_FAILED) |
| 155 | { |
| 156 | perror("mmap(memregs) failed"); |
| 157 | close(memdev); |
| 158 | return 1; |
| 159 | } |
| 160 | |
| 161 | ret = pollux_dpc_set(memregs, argv[1]); |
| 162 | |
| 163 | munmap((void *)memregs, 0x10000); |
| 164 | close(memdev); |
| 165 | |
| 166 | return ret; |
| 167 | } |
| 168 | #endif |