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ucmb: Add support for a reset line to the microcontroller.

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git-svn-id: svn://svn.openwrt.org/openwrt/packages@14586 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
mb
2009-02-20 23:24:55 +00:00
parent 5329011836
commit 0d2ac176e0
3 changed files with 144 additions and 19 deletions
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29
utils/ucmb-tools/tools/ucmb.c
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@ -13,32 +13,39 @@
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <linux/ioctl.h>
#define UCMB_DEV "/dev/ucmb"
#define __UCMB_IOCTL ('U'|'C'|'M'|'B')
#define UCMB_IOCTL_RESETUC _IO(__UCMB_IOCTL, 0)
static void usage(int argc, char **argv)
{
fprintf(stderr, "Usage: %s read|write\n", argv[0]);
fprintf(stderr, "Usage: %s read|write|reset [" UCMB_DEV "]\n", argv[0]);
}
int main(int argc, char **argv)
{
const char *command;
int errcode = 0;
const char *command, *devpath = UCMB_DEV;
int res, errcode = 0;
int ucmb_fd;
char *buf;
size_t count, buflen;
ssize_t nrbytes;
if (argc != 2) {
if (argc != 2 && argc != 3) {
usage(argc, argv);
return 1;
}
if (argc == 3)
devpath = argv[2];
command = argv[1];
ucmb_fd = open(UCMB_DEV, O_RDWR);
ucmb_fd = open(devpath, O_RDWR);
if (ucmb_fd == -1) {
fprintf(stderr, "Failed to open %s\n", UCMB_DEV);
errcode = 1;
@ -58,22 +65,34 @@ int main(int argc, char **argv)
if (nrbytes < 0) {
fprintf(stderr, "Failed to read UCMB: %s (%d)\n",
strerror(errno), errno);
errcode = 1;
goto out_free;
}
if (fwrite(buf, nrbytes, 1, stdout) != 1) {
fprintf(stderr, "Failed to write stdout\n");
errcode = 1;
goto out_free;
}
} else if (strcasecmp(command, "write") == 0) {
count = fread(buf, 1, buflen, stdin);
if (!count) {
fprintf(stderr, "Failed to read stdin\n");
errcode = 1;
goto out_free;
}
nrbytes = write(ucmb_fd, buf, count);
if (nrbytes != count) {
fprintf(stderr, "Failed to write UCMB: %s (%d)\n",
strerror(errno), errno);
errcode = 1;
goto out_free;
}
} else if (strcasecmp(command, "reset") == 0) {
res = ioctl(ucmb_fd, UCMB_IOCTL_RESETUC);
if (res) {
fprintf(stderr, "RESET ioctl failed: %s (%d)\n",
strerror(res < 0 ? -res : res), res);
errcode = 1;
goto out_free;
}
} else {