Messages in this thread | | | Date | Sat, 24 Nov 2001 13:19:35 -0800 | From | Joe <> | Subject | Re: 2.4.14/2.4.15 cpia driver IS broke.. no its parport |
| |
Okay I have done some more research and found out what is happening! After further testing I have found out that the problem with the parport driver is actually in the ieee1294 code. One of the changes in the file drivers/parport/ieee1294_ops.c is causing problems. (for me atleast)
The code has changed from calls to parport_frob_control() to calls to parport_write_control ().(Fine)
The problem is that in the call to acknowledge the handshake (Event 44? about line592) the call to parport_frob_control or parport_pc_frob_control as it is #defined to is called with a 0 which I think causes the code to call parport_pc_data_forward and the new code just calls parport_pc_data_reverse. I think that we may need to call the parport_pc_data_forward still.
- parport_write_control (port, ctl); // new code + parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0); //old working code
Joe
> I have been doing some testing and debugging and found out that something in > the 2.4.14 parport driver is breaking my webcam II. I have a patch that > reverts out all the changes in 2.4.14 parport driver back to 2.4.13 and the > driver now works. I am going to do some more testing and see if I can narrow > the code down. Right now the patch is about 700+ lines, but reverts out > ALL the parport changes. > > My hardward is a VIA chipset (686). It is the ABiT KT7A MB. > > What's happening is that the cpia is being recgonized, but the video device > is not accessable. This is in both 2.4.15 and 2.4.14, with the creative > WebCam II. > > In the /proc/cpia/video0 file it shows the CPIA version as 0.00 instead of > 1.20.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |