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authorJörg Frings-Fürst <debian@jff-webhosting.net>2021-02-16 18:25:42 +0100
committerJörg Frings-Fürst <debian@jff-webhosting.net>2021-02-16 18:25:42 +0100
commit64ddd1a4dfcefd11f662f5cf4bb05b590d901a97 (patch)
tree4303648095deff998ae20c2393b56db527742ac9 /backend/plustek-usbhw.c
parent5793a221e112fa49073de0137d6bfa750a61b0a1 (diff)
parentecaaf250cb33ff61f37a7b441f2337584a655350 (diff)
Merge branch 'feature/upstream' into develop
Diffstat (limited to 'backend/plustek-usbhw.c')
-rw-r--r--backend/plustek-usbhw.c12
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 {