SIM card related Projects » osmo-ccid-firmware

Since the fix for https://osmocom.org/issues/5285 the communication speed is very low.
I discovered that the new firmware does not respond correctly to the PC_to_RDR_SetParameters CCID command.

In my CCID driver log I have:
```
00000004 [140598069671488] ifdhandler.c:872:IFDHSetProtocolParameters() Set speed to 156250 bauds
00000004 [140598069671488] ifdhandler.c:1113:IFDHSetProtocolParameters() Communication timeout: 511181 ms
00000003 [140598069671488] commands.c:2319:SetParameters() length: 5 bytes
00000007 [140598069671488] > 000000 61 05 00 00 00 00 4C 00 00 00 96 00 00 0A 00
00000201 [140598069671488] ccid_usb.c:948:ReadUSB() Waiting data for slot 0
00000166 [140598627542592] ccid_usb.c:1949:Multi_ReadProc() Read 14 bytes for slot 0
00000025 [140598627542592] ccid_usb.c:1957:Multi_ReadProc() Signaled reader 0 slot 0
00000006 [140598627542592] ccid_usb.c:1917:Multi_ReadProc() Waiting read for reader 0
00000065 [140598069671488] ccid_usb.c:962:ReadUSB() Got 14 bytes for slot 0
00000018 [140598069671488] < 000000 82 05 00 00 00 00 4C 00 00 00 00 00 00 00
```

The reader answer RDR_to_PC_Parameters should contain 15 bytes (same as in the PC_to_RDR_SetParameters command) and should reflect the options set in the PC_to_RDR_SetParameters command.
But the answer is 14 bytes only. The abProtocolDataStructure in the response contains 4 bytes instead of 5. And the 4 bytes are all 0x00.

I guess the reader does not handle the PC_to_RDR_SetParameters and that explains the very slow card/reader communication speed. The bmFindexDindex parameter is not used so, I guess, the speed is using TA1=0x11 instead of 0x96 in my example.

My CCID driver does not check the data in the abProtocolDataStructure of the RDR_to_PC_Parameters so the driver is not complaining. But maybe it should report the error.