mirror of https://github.com/hak5/openwrt.git
82 lines
2.4 KiB
Diff
82 lines
2.4 KiB
Diff
commit 2c0d0491438433a1f327f2e754c7b6b55fec51c4
|
|
Author: Tim Harvey <tharvey@gateworks.com>
|
|
Date: Thu Feb 27 00:59:53 2014 -0800
|
|
|
|
PCI: imx6: ventana: fixup for IRQ mismapping
|
|
|
|
The TI XIO2001 PCIe-to-PCI bridge used on several Ventana expansion boards
|
|
has its slot-to-bridge IRQ mapping reversed from the PCI specification:
|
|
|
|
INTA->INTD
|
|
INTB->INTC
|
|
INTC->INTB
|
|
INTD->INTA
|
|
|
|
Implement a custom swizzle function that does a fixup on the interrupt for
|
|
devices on a TI XIO2001 bridge.
|
|
|
|
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
|
|
|
|
--- a/drivers/pci/host/pci-imx6.c
|
|
+++ b/drivers/pci/host/pci-imx6.c
|
|
@@ -553,6 +553,39 @@ static int __init imx6_add_pcie_port(str
|
|
return 0;
|
|
}
|
|
|
|
+/* TI XIO2001 PCIe-to-PCI bridge on GW16082 exp card has IRQs reversed */
|
|
+u8 ventana_swizzle(struct pci_dev *dev, u8 *pin)
|
|
+{
|
|
+ u8 i = 0;
|
|
+ struct pci_dev *pdev = dev;
|
|
+
|
|
+ /* count number of TI XIO2001 bridges on bus */
|
|
+ while (!pci_is_root_bus(pdev->bus)) {
|
|
+ if (pdev->bus && pdev->bus->self &&
|
|
+ (pdev->bus->self->vendor == PCI_VENDOR_ID_TI) &&
|
|
+ (pdev->bus->self->device == PCI_DEVICE_ID_TI_XIO2001)) {
|
|
+ i++;
|
|
+ }
|
|
+ pdev = pdev->bus->self;
|
|
+ }
|
|
+ while (!pci_is_root_bus(dev->bus)) {
|
|
+ /* if we are directly downstream from 1st TI XIO2001 bridge */
|
|
+ if (dev->bus && dev->bus->self &&
|
|
+ (dev->bus->self->vendor == PCI_VENDOR_ID_TI) &&
|
|
+ (dev->bus->self->device == PCI_DEVICE_ID_TI_XIO2001)) {
|
|
+ if (--i == 0) {
|
|
+ /* swap IRQs and swizzle backwards */
|
|
+ *pin = (15 - PCI_SLOT(dev->devfn)) + 1;
|
|
+ dev = dev->bus->self;
|
|
+ continue;
|
|
+ }
|
|
+ }
|
|
+ *pin = pci_swizzle_interrupt_pin(dev, *pin);
|
|
+ dev = dev->bus->self;
|
|
+ }
|
|
+ return PCI_SLOT(dev->devfn);
|
|
+}
|
|
+
|
|
static int __init imx6_pcie_probe(struct platform_device *pdev)
|
|
{
|
|
struct imx6_pcie *imx6_pcie;
|
|
@@ -618,6 +651,9 @@ static int __init imx6_pcie_probe(struct
|
|
return PTR_ERR(imx6_pcie->iomuxc_gpr);
|
|
}
|
|
|
|
+ if (of_machine_is_compatible("gw,ventana"))
|
|
+ pp->swizzle = ventana_swizzle;
|
|
+
|
|
ret = imx6_add_pcie_port(pp, pdev);
|
|
if (ret < 0)
|
|
return ret;
|
|
--- a/include/linux/pci_ids.h
|
|
+++ b/include/linux/pci_ids.h
|
|
@@ -827,6 +827,7 @@
|
|
#define PCI_DEVICE_ID_TI_XX12 0x8039
|
|
#define PCI_DEVICE_ID_TI_XX12_FM 0x803b
|
|
#define PCI_DEVICE_ID_TI_XIO2000A 0x8231
|
|
+#define PCI_DEVICE_ID_TI_XIO2001 0x8240
|
|
#define PCI_DEVICE_ID_TI_1130 0xac12
|
|
#define PCI_DEVICE_ID_TI_1031 0xac13
|
|
#define PCI_DEVICE_ID_TI_1131 0xac15
|