Hello all,
i�m trying to get my Philips PCVC 690K webcam to functioning with ISP 1161A
on a MCF 5272 Coldfire uClinux 2.4.22-uc0 system. First of all USB keyboard
an mouse is functioning. If i�m right, then the ISP 1161 driver needs ISO
support for the webcam. I read some threads here in the list about this and
tried first Roman�s 0.95 driver. The camera get�s detected but with cat
/dev/video0 nothing happens. The communication theems not working. So i
changed following lines like in the Tango version:
in the hc_interrupt routine:
#ifdef HC_ENABLE_ISOC
/* read itl1 first. if there is an buffer overflow HC will stop at itl1
There will be a quirks in sh_done_list if this happens !!!!! */
if (bstat & ITL1BufferDone) {
//if ((bstat & ITL1BufferFull) && (bstat & ITL1BufferDone)) {
hp->itl1_len = READ_REG16 (hci, HcReadBackITL1Length);
if (hp->itl1_len > 0) {
printk("bstat =%x hp->itl1_len=%d\n",bstat,hp->itl1_len);
WRITE_REG16 (hci, hp->itl1_len, HcTransferCounter);
READ_REGn16 (hci, HcITLBufferPort, hp->itl1_len,
hp->tl);
hp->tlp = 0;
hci->td_array = &hci->i_td_array [1];
sh_done_list (hci);
}
iso_buffer_index = 1;
}
if (bstat & ITL0BufferDone) {
//if ((bstat & ITL0BufferFull) && (bstat & ITL0BufferDone)) {
hp->itl0_len = READ_REG16 (hci, HcReadBackITL0Length);
if (hp->itl0_len > 0) {
printk("bstat =%x hp->itl0_len=%d\n",bstat,hp->itl0_len);
WRITE_REG16 (hci, hp->itl0_len, HcTransferCounter);
READ_REGn16 (hci, HcITLBufferPort, hp->itl0_len,
hp->tl);
hp->tlp = 0;
hci->td_array = &hci->i_td_array [0];
sh_done_list (hci);
}
iso_buffer_index = 0;
}
hp->tlp = 0;
hci->td_array = &hci->i_td_array [iso_buffer_index];
sh_scan_iso_urb_list (hci, &hci->iso_list, hci->frame_number + 1);
if (hp->tlp >0) {
WRITE_REG16 (hci, hp->tlp, HcTransferCounter);
WRITE_REGn16 (hci, HcITLBufferPort, hp->tlp, hp->tl);
}
#endif
With these lines i get some output like:
...
bstat = c hp->itl0_len=1480
bstat = c hp->itl0_len=1480
bstat = c hp->itl0_len=1480
bstat = c hp->itl0_len=1480
bstat = e hp->itl0_len=1480
bstat = c hp->itl0_len=1480
bstat = e hp->itl0_len=1480
bstat = c hp->itl0_len=1480
...
Without the printk�s i get with cat /dev/video0 after a short time a kernel
panig with following failure message:
In idle task - not syncing
<7> pwc_isoc_handler() called with status -75 [Babble (bad cable?)].
I think this is because of the iso transfer, right?
I tried also the tango and some other drivers, but there i�m getting also
trouble.
Is there anywhere a functioning implementation with ISO Transfer? Are there
other things that i�ve to look after?
Thx for any help,
David
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