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Au1550 with kernel linux-2.6.28.1 PCI Cardbus mappings too large

To: linux-mips <linux-mips@linux-mips.org>
Subject: Au1550 with kernel linux-2.6.28.1 PCI Cardbus mappings too large
From: Frank Neuber <linux-mips@kernelport.de>
Date: Mon, 26 Jan 2009 11:21:36 +0100
In-reply-to: <1232871616.28527.347.camel@t60p>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <1232739600.28527.289.camel@t60p> <20090124085734.5b6b5c66@scarran.roarinelk.net> <1232787448.28527.302.camel@t60p> <1232839224.28527.336.camel@t60p> <1232871616.28527.347.camel@t60p>
Sender: linux-mips-bounce@linux-mips.org
Hello again,
as I sad I want to use a USB controller wired on the pci bus.
The EHCI Probe (usb_hcd_pci_probe) fails with "controller already in
use" error because the request_mem_region gives an error.

I think the Problem is that the CardBus bridge eat the mem.
As a refence you can compare the CadrBus mem window on 2.6.28.1 with
2.6.16.11.
At the moment I have no idea how can I fix this resource conflict ...

I found a pcibios_fixup_bus fuction that reorganize the dev->resource[i]
values but I'm not sure if this is called during pci init. I'll check
this now.
Is there a PCI guru for mips on the list?

Kind regards,
 Frank
 
Kernel 2.6.28.1 output
pci 0000:00:0c.0: PME# supported from D1 D3hot D3cold
pci 0000:00:0c.0: PME# disabled
pci 0000:00:0c.1: PME# supported from D1 D3hot D3cold
pci 0000:00:0c.1: PME# disabled
pci 0000:00:0c.2: PME# supported from D0 D1 D2 D3hot D3cold
pci 0000:00:0c.2: PME# disabled
pci 0000:00:0d.0: PME# supported from D0 D1 D2 D3hot D3cold
pci 0000:00:0d.0: PME# disabled
pci 0000:00:0d.1: PME# supported from D0 D1 D2 D3hot D3cold
pci 0000:00:0d.1: PME# disabled
pci 0000:00:0c.0: BAR 0: can't allocate mem resource
[0x50000000-0x4fffffff]
pci 0000:00:0c.1: BAR 0: can't allocate mem resource
[0x50000000-0x4fffffff]
pci 0000:00:0d.0: BAR 0: can't allocate mem resource
[0x50000000-0x4fffffff]
pci 0000:00:0d.1: BAR 0: can't allocate mem resource
[0x50000000-0x4fffffff]
pci 0000:00:0c.2: BAR 0: can't allocate mem resource
[0x50000000-0x4fffffff]
pci 0000:00:0d.0: CardBus bridge, secondary bus 0000:01
pci 0000:00:0d.0:   IO window: 0x001000-0x0010ff
pci 0000:00:0d.0:   IO window: 0x001400-0x0014ff
pci 0000:00:0d.0:   PREFETCH window: 0x40000000-0x43ffffff
pci 0000:00:0d.0:   MEM window: 0x44000000-0x47ffffff
pci 0000:00:0d.1: CardBus bridge, secondary bus 0000:05
pci 0000:00:0d.1:   IO window: 0x001800-0x0018ff
pci 0000:00:0d.1:   IO window: 0x001c00-0x001cff
pci 0000:00:0d.1:   PREFETCH window: 0x48000000-0x4bffffff
pci 0000:00:0d.1:   MEM window: 0x4c000000-0x4fffffff
PCI: Enabling device 0000:00:0d.0 (0000 -> 0003)
PCI: Enabling device 0000:00:0d.1 (0000 -> 0003)


Kernel 2.6.16.11 output
PCI: Bus 1, cardbus bridge: 0000:00:0d.0
  IO window: 00001000-000010ff
  IO window: 00001400-000014ff
  PREFETCH window: 40000000-41ffffff
  MEM window: 42000000-43ffffff
PCI: Bus 5, cardbus bridge: 0000:00:0d.1
  IO window: 00001800-000018ff
  IO window: 00001c00-00001cff
  PREFETCH window: 44000000-45ffffff
  MEM window: 46000000-47ffffff
PCI: Enabling device 0000:00:0d.0 (0000 -> 0003)
PCI: Setting latency timer of device 0000:00:0d.0 to 64
PCI: Enabling device 0000:00:0d.1 (0000 -> 0003)
PCI: Setting latency timer of device 0000:00:0d.1 to 64



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