e8f5db5d |
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 |