Thanks Dr. Ludovic Rousseau
Following your advice, the problem exists in the function of
"IFDHICCPresence" in ifdhandler.c.
ret = read(SmartCard[readerNum].fd, buffer, sizeof(buffer));
PRINTFD("read %d\n", ret);
if (ret != 4)
return IFD_COMMUNICATION_ERROR;
The above snippet which returns -1 will call the function "skel_read"
in the kernel module driver DT3500.c which returns -84. In fact, the
error occurs when "usb_bulk_msg" is called in skel_read. I check
errno.h and find that 84 is the error number of
#define EILSEQ 84 /* Illegal byte sequence */
The snippet in skel_read is :
......
/* do a blocking bulk read to get data from the device */
retval = usb_bulk_msg(dev->udev,
usb_rcvbulkpipe(dev->udev,
dev->bulk_in_endpointAddr),
dev->bulk_in_buffer,
//min(dev->bulk_in_size, count),
dev->bulk_in_size,
&count, HZ*10);
err("retval of skel_read %d", retval);
......
Reading Documentation/usb/error-codes.txt, I find that:
a) CRC mismatch
b) no response packet received within the
prescribed bus turn-around time
c) unknown USB error
How to make sure what the matter really is? I still can't understand
why the same code can run on kernel 2.6.11 but fail on kernel 2.6.14.
:(
On 1/19/06, [EMAIL PROTECTED]
<[EMAIL PROTECTED]> wrote:
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> 1. Re: Where is the implementation of IFDH_icc_presence?
(Ludovic Rousseau)
> 2. compiling pcsc-lite for mips (Ivan Korzakow)
> 3. Re: compiling pcsc-lite for mips (Ludovic Rousseau)
> 4. Re: compiling pcsc-lite for mips (Ivan Korzakow)
> 5. Re: compiling pcsc-lite for mips (Ludovic Rousseau)
> 6. Re: compiling pcsc-lite for mips (Ivan Korzakow)
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>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 18 Jan 2006 09:26:33 +0100
> From: Ludovic Rousseau <[EMAIL PROTECTED]>
> Subject: Re: [Muscle] Re: Muscle Digest, Vol 23, Issue 12
> To: MUSCLE <[email protected]>
> Message-ID: <[EMAIL PROTECTED]>
> Content-Type: text/plain; charset=ISO-8859-1
>
> On 18/01/06, mail mail <[EMAIL PROTECTED]> wrote:
> > Thanks Dr. Ludovic Rousseau.
> >
> > According to the usb-skeleton.c (my driver is derived from this code),
> > which function should I concern most to find out the problem?
> >
> > skel_read
> > skel_write
> > skel_ioctl
> > skel_open
> > skel_probe
> > usb_skel_init
>
> You should look for the problem in the USER SPACE part of the driver,
> not in the KERNEL SPACE part of the driver.
>
> The user space driver should be somewhere in /usr/local/pcsc/driver/*.bunble/
>
> Bye,
>
> --
> Dr. Ludovic Rousseau
>
>
>
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