While trying to fix Broadcom Corp CCID build-in reader (USB ID 0A5C:5801) found Dell Latitude E6400 and others, I discovered that the device's advertised second bit (0x2) of the dwFeatures flags of USB CCID descriptor causes problems for the openct ifd-ccid.c reader driver. The driver cannot power up a card.
The bit 0x2 is described in CCID USB document as "* 00000002h Automatic parameter configuration based on ATR data". If I ignore that bit the ifd-ccid.c powers up the card. If I don't, the card doesn't power up. The first difference between two cases is the set parameters command: Fails with 0xFB: Req : 61 07 00 00 00 00 04 01 00 00 00 00 00 00 00 00 00 Repl: 82 07 00 00 00 00 04 40 fb 00 00 00 00 00 00 00 00 Succeeds: Req : 61 07 00 00 00 00 04 01 00 00 96 10 00 45 00 fe 00 Repl: 82 07 00 00 00 00 04 00 ff 00 96 10 00 45 00 fe 00 As you can see, the second request, which succeeds, is filled with parameters parsed from ATR, while the corresponding parameters are zeroes in the first request. Also see http://www.natisbad.org/E4300/index.html . I wonder what is the correct interpretation of the 0x02 bit of dwFeatures ? Thank you. _______________________________________________ opensc-devel mailing list opensc-devel@lists.opensc-project.org http://www.opensc-project.org/mailman/listinfo/opensc-devel
