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authorLuka Perkov <luka@openwrt.org>2014-08-11 20:35:06 +0000
committerLuka Perkov <luka@openwrt.org>2014-08-11 20:35:06 +0000
commit9d826428b7c8a8f8167f71f3995bacc5a61efc22 (patch)
tree293b46395aa4973c93c3f96e94bb4ee81848a283 /target
parente47c4d7014d26c33aaa7522f06b4db4581d54703 (diff)
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imx6: kernel: add GW16082 miniPCI Expansion Mezzanine support
The GW16082 miniPCI Expansion Mezzanine has the INTA/B/C/D IRQ's reversed from the PCI standard. This will soon be resolved in the bootloader via devicetree, but in the meantime this will work around the issue. Signed-off-by: Tim Harvey <tharvey@gateworks.com> SVN-Revision: 42146
Diffstat (limited to 'target')
-rw-r--r--target/linux/imx6/patches-3.14/200-pci_designware_add-ability-for-custom-swizzle.patch33
-rw-r--r--target/linux/imx6/patches-3.14/201-pci_imx6_ventana_fixup-for-IRQ-mismapping.patch81
2 files changed, 114 insertions, 0 deletions
diff --git a/target/linux/imx6/patches-3.14/200-pci_designware_add-ability-for-custom-swizzle.patch b/target/linux/imx6/patches-3.14/200-pci_designware_add-ability-for-custom-swizzle.patch
new file mode 100644
index 0000000..b174376
--- /dev/null
+++ b/target/linux/imx6/patches-3.14/200-pci_designware_add-ability-for-custom-swizzle.patch
@@ -0,0 +1,33 @@
+commit e84634dc6c7f3f6af9b8ef1fb36f0d85c476ab95
+Author: Tim Harvey <tharvey@gateworks.com>
+Date: Thu Feb 27 01:02:23 2014 -0800
+
+ PCI: designware: add ability for custom swizzle
+
+ Add the ability for a platform driver to provide a platform-specific
+ swizzle function.
+
+ Signed-off-by: Tim Harvey <tharvey@gateworks.com>
+
+--- a/drivers/pci/host/pcie-designware.c
++++ b/drivers/pci/host/pcie-designware.c
+@@ -481,6 +481,9 @@ int __init dw_pcie_host_init(struct pcie
+ if (pp->ops->host_init)
+ pp->ops->host_init(pp);
+
++ if (pp->swizzle)
++ dw_pci.swizzle = pp->swizzle;
++
+ dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0);
+
+ /* program correct class for RC */
+--- a/drivers/pci/host/pcie-designware.h
++++ b/drivers/pci/host/pcie-designware.h
+@@ -53,6 +53,7 @@ struct pcie_port {
+ struct irq_domain *irq_domain;
+ unsigned long msi_data;
+ DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS);
++ u8 (*swizzle)(struct pci_dev *, u8 *);
+ };
+
+ struct pcie_host_ops {
diff --git a/target/linux/imx6/patches-3.14/201-pci_imx6_ventana_fixup-for-IRQ-mismapping.patch b/target/linux/imx6/patches-3.14/201-pci_imx6_ventana_fixup-for-IRQ-mismapping.patch
new file mode 100644
index 0000000..c8e2a0e
--- /dev/null
+++ b/target/linux/imx6/patches-3.14/201-pci_imx6_ventana_fixup-for-IRQ-mismapping.patch
@@ -0,0 +1,81 @@
+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
+@@ -540,6 +540,39 @@ static int imx6_add_pcie_port(struct pci
+ 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;
+@@ -648,6 +681,9 @@ 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
+@@ -822,6 +822,7 @@
+ #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