scd: Map some error codes from libusb to ccid-driver error codes.
* scd/ccid-driver.h (CCID_DRIVER_ERR_USB_*): New error codes. * scd/apdu.h: New SW_HOST error codes. * scd/apdu.c (host_sw_string): Print them * scd/ccid-driver.c (map_libusb_error): New. (ccid_open_usb_reader, bulk_in, abort_cmd): Map libusb error codes. * scd/iso7816.c (map_sw): Map new codes to gpg-error.
This change will help to get low level error conditions from hipher
application code.
- Signed-off-by: Werner Koch <wk@gnupg.org>