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review.sourcearcade.org / flashprog / ceec420c3db6c20c4b882e8bf3ad113db7fcd2de / . / jedec.h
blob: 18c5153c0d0b985b4e3d1e139fddf0d459058af6 [file] [log] [blame]
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000[diff] [blame]1extern int probe_jedec (struct flashchip * flash);
2extern int erase_jedec (struct flashchip * flash);
3extern int write_jedec (struct flashchip * flash, char * buf);
4
Ronald G. Minnichef5779d2002-01-29 20:18:02 +0000[diff] [blame]5extern __inline__ void toggle_ready_jedec (volatile char * dst)
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000[diff] [blame]6{
7 unsigned int i = 0;
8 char tmp1, tmp2;
9
10 tmp1 = *dst & 0x40;
11
12 while (i++ < 0xFFFFFF) {
13 tmp2 = *dst & 0x40;
14 if (tmp1 == tmp2) {
15 break;
16 }
17 tmp1 = tmp2;
18 }
19}
20
Ronald G. Minnichef5779d2002-01-29 20:18:02 +0000[diff] [blame]21extern __inline__ void data_polling_jedec (volatile char * dst, char data)
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000[diff] [blame]22{
23 unsigned int i = 0;
24 char tmp;
25
26 data &= 0x80;
27
28 while (i++ < 0xFFFFFF) {
29 tmp = *dst & 0x80;
30 if (tmp == data) {
31 break;
32 }
33 }
34}
35
Ronald G. Minnichef5779d2002-01-29 20:18:02 +0000[diff] [blame]36extern __inline__ void protect_jedec (volatile char * bios)
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000[diff] [blame]37{
Ronald G. Minnichef5779d2002-01-29 20:18:02 +0000[diff] [blame]38 *(volatile char *) (bios + 0x5555) = 0xAA;
39 *(volatile char *) (bios + 0x2AAA) = 0x55;
40 *(volatile char *) (bios + 0x5555) = 0xA0;
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000[diff] [blame]41
42 usleep(200);
43}
44
Ronald G. Minnichef5779d2002-01-29 20:18:02 +0000[diff] [blame]45extern __inline__ void write_page_jedec (volatile char * bios, char * src, volatile char * dst,
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000[diff] [blame]46 int page_size)
47{
48 int i;
49
Ronald G. Minnichef5779d2002-01-29 20:18:02 +0000[diff] [blame]50 *(volatile char *) (bios + 0x5555) = 0xAA;
51 *(volatile char *) (bios + 0x2AAA) = 0x55;
52 *(volatile char *) (bios + 0x5555) = 0xA0;
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000[diff] [blame]53
54 for (i = 0; i < page_size; i++) {
55 /* transfer data from source to destination */
56 *dst++ = *src++;
57 }
58
59 usleep(100);
60 toggle_ready_jedec(dst-1);
61}