diff options
Diffstat (limited to 'backend/plustek-usbhw.c')
| -rw-r--r-- | backend/plustek-usbhw.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/backend/plustek-usbhw.c b/backend/plustek-usbhw.c index 05d3cc7..0a65866 100644 --- a/backend/plustek-usbhw.c +++ b/backend/plustek-usbhw.c @@ -71,9 +71,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, - * MA 02111-1307, USA. + * along with this program. If not, see <https://www.gnu.org/licenses/>. * * As a special exception, the authors of SANE give permission for * additional uses of the libraries contained in this release of SANE. @@ -1451,6 +1449,14 @@ usb_ResetRegisters( Plustek_Device *dev ) * CanoScan devices to work properly after power-up */ sanei_lm983x_write_byte( dev->fd, 0x5b, regs[0x5b] ); + + /* At least CanoScan N650U can have a problem with writing + * to register 0x59 due XHCI USB controller is too + * fast for him. Simulate EHCI USB controller's + * behavior here - wait 1ms. + */ + usleep(1000); + sanei_lm983x_write_byte( dev->fd, 0x59, regs[0x59] ); sanei_lm983x_write_byte( dev->fd, 0x5a, regs[0x5a] ); } else { |