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[POWERPC] 86xx: Created quirk_fsl_pcie_transparent() to initialize bridge resources.

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The Freescale PCI-e RC poses as a transparent bridge, but does not
implement the IO_BASE or IO_LIMIT registers in the config space.  This
means that the code which initializes the bridge resources ends up
setting the IO resources erroneously.  Add quick_fsl_pcie_transparent()
to handle this.

This change sets RC of mpc8641 to be a transparent bridge
for legacy I/O access and initializes the RC bridge resources
from the device tree.

Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Zhang Wei 2007-06-26 18:22:40 -05:00 committed by Kumar Gala
parent 6d8ff10c3a
commit 20243c72a8
1 changed files with 37 additions and 0 deletions
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37
arch/powerpc/platforms/86xx/pci.c
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@ -134,6 +134,43 @@ mpc86xx_setup_pcie(struct pci_controller *hose, u32 pcie_offset, u32 pcie_size)
early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);
}
static void __devinit quirk_fsl_pcie_transparent(struct pci_dev *dev)
{
struct resource *res;
int i, res_idx = PCI_BRIDGE_RESOURCES;
struct pci_controller *hose;
/*
* Make the bridge be transparent.
*/
dev->transparent = 1;
hose = pci_bus_to_hose(dev->bus->number);
if (!hose) {
printk(KERN_ERR "Can't find hose for bus %d\n",
dev->bus->number);
return;
}
if (hose->io_resource.flags) {
res = &dev->resource[res_idx++];
res->start = hose->io_resource.start;
res->end = hose->io_resource.end;
res->flags = hose->io_resource.flags;
}
for (i = 0; i < 3; i++) {
res = &dev->resource[res_idx + i];
res->start = hose->mem_resources[i].start;
res->end = hose->mem_resources[i].end;
res->flags = hose->mem_resources[i].flags;
}
}
DECLARE_PCI_FIXUP_EARLY(0x1957, 0x7010, quirk_fsl_pcie_transparent);
DECLARE_PCI_FIXUP_EARLY(0x1957, 0x7011, quirk_fsl_pcie_transparent);
#define PCIE_LTSSM 0x404 /* PCIe Link Training and Status */
#define PCIE_LTSSM_L0 0x16 /* L0 state */