Joshua Prismon wrote:
I am still getting the hang of this code, so it's very very possible
that I am missing something basic here.
I don't think the problem is in the request_aquire function. In fact
that doesn't even appear to be every called. The DVB driver registered
correctly with the cx88-mpeg driver ( cx8802_register_driver). That
driver registers with the pci_driver.
That PCI probe doesn't appear to be actually called. When
cx8802_register_driver starts looping through devices (after the dvb
driver is registered), it doesn't find any devices at all. The
devlist should be (if I read the code correctly) populated by the
cx8802_probe function.
As a quick test, I added the following lines to the
pci_register_driver to see what the system actually sees in the PCI
tables:
/*
.vendor = 0x14f1,
.device = 0x8802,
*/
dev = pci_find_device(0x14f1, 0x8802, dev);
<cut>
05:00.0 0400: 14f1:8800 (rev 05)
Subsystem: 7063:3000
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium
TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (5000ns min, 13750ns max), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 21
Region 0: Memory at f6000000 (32-bit, non-prefetchable) [size=16M]
Capabilities: [44] Vital Product Data
Capabilities: [4c] Power Management version 2
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
05:00.4 0480: 14f1:8804 (rev 05)
Subsystem: 7063:3000
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium
I don't see the mpeg PCI function enabled. In other words I don't see
the 14f1:8802 device. Why is this missing? I expected to see an entire
entry for this.
The cx8802.ko (cx88-mpeg.c) driver registers against 14f1:8802 and so if
that isn't registered then DVB is never going to work, because the
kernel will never probe it.
Are you completely sure the DVB device works under other kernels?
Can you tell me which vanilla kernel from www.kernel.org this DVB
product is working correctly with?
Steve
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