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authorZhang Wei <wei.zhang@freescale.com>2007-06-26 18:22:40 -0500
committerKumar Gala <galak@kernel.crashing.org>2007-06-29 01:58:30 -0500
commit20243c72a8564ccd22437fd1bda16ca5bccd5701 (patch)
tree21030a3febbc52db4c846c1b1be188a851fc6233 /arch/powerpc/platforms
parent6d8ff10c3ab1e3d4a40788442f1369e868103e43 (diff)
[POWERPC] 86xx: Created quirk_fsl_pcie_transparent() to initialize bridge resources.
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>
Diffstat (limited to 'arch/powerpc/platforms')
-rw-r--r--arch/powerpc/platforms/86xx/pci.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/86xx/pci.c b/arch/powerpc/platforms/86xx/pci.c
index 6f3c0f674bb..2d7254c91ad 100644
--- a/arch/powerpc/platforms/86xx/pci.c
+++ b/arch/powerpc/platforms/86xx/pci.c
@@ -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 */