]> git.kernelconcepts.de Git - karo-tx-uboot.git/blob - tools/xway-swap-bytes.c
mmc: omap_hsmmc: enable 8bit interface for eMMC for AM43xx
[karo-tx-uboot.git] / tools / xway-swap-bytes.c
1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <string.h>
4 #include <unistd.h>
5
6 #ifndef BUFSIZ
7 # define BUFSIZ 4096
8 #endif
9
10 #undef BUFSIZ
11 # define BUFSIZ 64
12 int main (void)
13 {
14         short ibuff[BUFSIZ], obuff[BUFSIZ];
15         int rc, i, len;
16
17         while ((rc = read (0, ibuff, sizeof (ibuff))) > 0) {
18                 memset (obuff, 0, sizeof (obuff));
19                 for (i = 0; i < (rc + 1) / 2; i++) {
20                         obuff[i] = ibuff[i ^ 1];
21                 }
22
23                 len = (rc + 1) & ~1;
24
25                 if (write (1, obuff, len) != len) {
26                         perror ("read error");
27                         return (EXIT_FAILURE);
28                 }
29
30                 memset (ibuff, 0, sizeof (ibuff));
31         }
32
33         if (rc < 0) {
34                 perror ("read error");
35                 return (EXIT_FAILURE);
36         }
37         return (EXIT_SUCCESS);
38 }