linux-kernel - Cardbus WLAN on PPC32 DMA error 2.6.30+

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Message-ID:  <8s6hq6xepq.ln2@roo.daria.co.uk>
Date:	Wed, 14 Oct 2009 16:21:12 +0100
From:	Jonathan Hudson <jh+lkm@...ia.co.uk>
To:	linux-kernel@...r.kernel.org
Subject:  Cardbus WLAN on PPC32 DMA error 2.6.30+

On kernels later than the 2.6.29 series, on inserting a cardbus WLAN
card, I get DMA error messages (from 2.6.31.4)

For a rt2500pci:

[  176.881208] pci 0001:11:00.0: reg 10 32bit mmio: [0xffffe000-0xffffffff]
[  177.040993] rt2500pci 0001:11:00.0: enabling device (0000 -> 0002)
[  177.041019] rt2x00pci -> rt2x00pci_probe: Error - PCI DMA not supported.
[  177.041044] rt2500pci: probe of 0001:11:00.0 failed with error -5

For a Broadcom 4306:

[   45.031787] b43 ssb0:0: firmware: requesting b43/ucode5.fw
[   45.226831] b43 ssb0:0: firmware: requesting b43/pcm5.fw
[   45.313161] b43 ssb0:0: firmware: requesting b43/b0g0initvals5.fw
[   45.362739] b43 ssb0:0: firmware: requesting b43/b0g0bsinitvals5.fw
[   45.527782] b43-phy0: Loading firmware version 478.104 (2008-07-01 00:50:23)
[   45.595983] b43-phy0 ERROR: The machine/kernel does not support the required 30-bit DMA mask
[   46.731628] b43-phy0 ERROR: Microcode not responding
[   46.731642] b43-phy0 ERROR: You must go to http://wireless.kernel.org/en/users/Drivers/b43#devicefirmware and download the correct firmware for this driver version. Please carefully read all instructions on this website.

(similar results with b43legacy).

Both these cards work with 2.6.29.6 and earlier. I don't have any
architectures other than PPC32 with cardbus to test the cards.

Any advice welcomed.

-jh





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