[PATCH 03/15] ARM: tegra: use fixed PCI i/o mapping

[Stephen Warren]

On 07/06/2012 12:40 PM, Rob Herring wrote:
> From: Rob Herring <rob.herring at calxeda.com>
> 
> Move tegra PCI to fixed i/o mapping and remove io.h.

Thierry, since you're the Tegra PCIe expert right now, could you please
test and/or comment on this.

I did try testing this on next-20120705 on TrimSlice (i.e. the
PCIe-based Ethernet controller), but found that PCIe has stopped working
there due to "resource collisions". I know this used to work fairly
recently, since I tested it when I added the PCIe initialization call to
board-dt-tegra20.c. The PCIe messages are:

> PCIE: port 1: link down, retrying
> PCIE: port 1: link down, retrying
> PCIE: port 1: link down, ignoring
> PCI host bridge to bus 0000:00
> pci_bus 0000:00: root bus resource [io  0x1000-0x8fff]
> pci_bus 0000:00: root bus resource [mem 0x90000000-0x97ffffff]
> pci_bus 0000:00: root bus resource [mem 0xa0000000-0xa7ffffff pref]
> pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
> pci_bus 0000:00: busn_res: [bus 00-ff] is inserted under domain [bus 00-ff]
> pci 0000:00:00.0: [10de:0bf0] type 01 class 0x060000
> pci 0000:00:00.0: PME# supported from D0 D1 D2 D3hot D3cold
> PCI: bus0: Fast back to back transfers disabled
> pci_bus 0000:01: busn_res: [bus 01-ff] is inserted under [bus 00-ff]
> pci 0000:01:00.0: [10ec:8168] type 00 class 0x020000
> pci 0000:01:00.0: reg 10: [io  0x0000-0x00ff]
> pci 0000:01:00.0: reg 18: [mem 0x00000000-0x00000fff 64bit pref]
> pci 0000:01:00.0: reg 20: [mem 0x00000000-0x00003fff 64bit pref]
> pci 0000:01:00.0: reg 30: [mem 0x00000000-0x0001ffff pref]
> pci 0000:01:00.0: supports D1 D2
> pci 0000:01:00.0: PME# supported from D0 D1 D2 D3hot D3cold
> PCI: bus1: Fast back to back transfers disabled
> pci_bus 0000:01: busn_res: [bus 01-ff] end is updated to 01
> pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 01
> r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded
> PCI: Device 0000:01:00.0 not available because of resource collisions
> r8169 0000:01:00.0: (unregistered net_device): enable failure
> r8169: probe of 0000:01:00.0 failed with error -22
> pci 0000:00:00.0: BAR 9: assigned [mem 0xa0000000-0xa00fffff pref]
> pci 0000:00:00.0: BAR 7: assigned [io  0x1000-0x1fff]
> pci 0000:01:00.0: BAR 6: assigned [mem 0xa0000000-0xa001ffff pref]
> pci 0000:01:00.0: BAR 4: assigned [mem 0xa0020000-0xa0023fff 64bit pref]
> pci 0000:01:00.0: BAR 2: assigned [mem 0xa0024000-0xa0024fff 64bit pref]
> pci 0000:01:00.0: BAR 0: assigned [io  0x1000-0x10ff]
> pci 0000:00:00.0: PCI bridge to [bus 01]
> pci 0000:00:00.0:   bridge window [io  0x1000-0x1fff]
> pci 0000:00:00.0:   bridge window [mem 0xa0000000-0xa00fffff pref]
> PCI: enabling device 0000:00:00.0 (0140 -> 0143)