Hi Alan,
Haruo> Using ioctl (fd, USBDEVFS_RESET, 0), I tested reset.
Haruo> usb-storage of USB2.0 was successful.
Haruo> When FDD was used in the case of USB1.1,
Haruo> mount became impossible after reset.
Alan> What do you mean? What does the log show?
I'm sorry. I wrote the following programs.
The execution result is as follows.
[EMAIL PROTECTED] root]# cd ~tomita/usbreset
[EMAIL PROTECTED] usbreset]# ./usbreset
bus = /proc/bus/usb/001/002
合計 864
-rwxr-xr-x 1 root root 46481 8月 28 12:05 1.18j1.wks
-rwxr-xr-x 1 root root 46481 8月 28 12:05 1.18j2.wks
-rwxr-xr-x 1 root root 46481 8月 28 12:05 1.18j3.wks
-rwxr-xr-x 1 root root 11829 9月 10 17:30 15.50s.tar.gz
-rwxr-xr-x 1 root root 16 3月 6 2003 S99zzz
-rwxr-xr-x 1 root root 914 4月 10 08:58 abort-test.patch
-rwxr-xr-x 1 root root 938 4月 23 2002 autoftp.bat
-rwxr-xr-x 1 root root 1412 9月 11 13:28 fdd.txt
-rwxr-xr-x 1 root root 3703 3月 6 2003 halt
-rwxr-xr-x 1 root root 378 8月 27 17:57 iozone_test.sh
-rwxr-xr-x 1 root root 46481 9月 9 08:51 mr518_128MB_1.wks
-rwxr-xr-x 1 root root 46481 9月 9 08:51 mr518_128MB_2.wks
-rwxr-xr-x 1 root root 46481 9月 9 08:51 mr518_128MB_3.wks
-rwxr-xr-x 1 root root 46481 9月 9 14:32 mr518_256MB_1.wks
-rwxr-xr-x 1 root root 46481 9月 9 14:32 mr518_256MB_2.wks
-rwxr-xr-x 1 root root 46481 9月 9 14:32 mr518_256MB_3.wks
-rwxr-xr-x 1 root root 46481 9月 8 16:38 mr518_64MB_1.wks
-rwxr-xr-x 1 root root 46481 9月 8 16:38 mr518_64MB_2.wks
-rwxr-xr-x 1 root root 46481 9月 8 16:38 mr518_64MB_3.wks
-rwxr-xr-x 1 root root 104118 8月 26 02:10 patch-0825
-rwxr-xr-x 1 root root 759 5月 30 11:38 profile
-rwxr-xr-x 1 root root 17081 9月 8 20:12 rhn_err1.jpg
-rwxr-xr-x 1 root root 37151 9月 8 20:12 rhn_err2.jpg
-rwxr-xr-x 1 root root 1369 9月 8 20:16 rpm.txt
-rwxr-xr-x 1 root root 345 4月 3 20:15 script_cp.sh
-rwxr-xr-x 1 root root 859 4月 3 20:16 script_cp_hdd.sh
-rwxr-xr-x 1 root root 539 4月 5 14:41 script_cp_scsi.sh
-rwxr-xr-x 1 root root 46481 8月 28 12:06 v2.00.71.wks
-rwxr-xr-x 1 root root 46481 8月 28 12:06 v2.00.72.wks
-rwxr-xr-x 1 root root 46481 8月 28 12:06 v2.00.73.wks
usb reset success 1
error: usbdevfs not opend
[EMAIL PROTECTED] usbreset]#
[EMAIL PROTECTED] root]# mount /dev/sda /mnt/floppy/
/dev/sda: Input/output error
mount: you must specify the filesystem type
---- sample program
int main(int argc, char **argv);
static int open_usbdevfs(char *bus);
int main(int argc, char **argv)
{
char bus[22];
int fd, ret=1, count=0;
/* make bus name */
snprintf(bus,22,"/proc/bus/usb/001/002");
#ifdef DEBUG
printf("bus = %s\n", bus);
#endif /* DEBUG */
while (1) {
/* device open */
if ((fd=open_usbdevfs(bus)) < 0) {
printf("error: usbdevfs not opend\n");
ret=0;
break;
}
system("mount /dev/sda /mnt/floppy");
system("ls -l /mnt/floppy");
system("umount /dev/sda");
/* device reset */
ret=ioctl(fd, USBDEVFS_RESET, 0);
if (ret == -1) {
printf("error: usbdevfs_reset error %d\n", ret);
ret = 0;
break;
}
/* device close */
close (fd);
[EMAIL PROTECTED]@sleep(10);
[EMAIL PROTECTED]@count++;
printf("usb reset success %d\n", count);
}
if (fd)
close(fd);
return 1;
}
static int open_usbdevfs(char *bus) {
int fd;
fd = open(bus, O_RDWR);
if (fd < 0)
return -1;
return fd;
}
--
Haruo
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