ramips: update v3.10 patches

Sync the patches with those sent upstream for v3.12.

Signed-off-by: John Crispin <blogic@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37778 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 864 insertions, 0 deletions

diff --git a/target/linux/ramips/patches-3.10/0022-MIPS-add-driver-for-the-built-in-PCI-controller-of-the-RT3883-SoC.patch b/target/linux/ramips/patches-3.10/0022-MIPS-add-driver-for-the-built-in-PCI-controller-of-the-RT3883-SoC.patch
new file mode 100644
index 0000000000..e7e01d14f7
--- /dev/null
+++ b/target/linux/ramips/patches-3.10/0022-MIPS-add-driver-for-the-built-in-PCI-controller-of-the-RT3883-SoC.patch
@@ -0,0 +1,864 @@
+From patchwork Fri Aug  9 16:03:32 2013
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: MIPS: add driver for the built-in PCI controller of the RT3883 SoC
+From: Gabor Juhos <juhosg@openwrt.org>
+X-Patchwork-Id: 5687
+Message-Id: <1376064212-28415-1-git-send-email-juhosg@openwrt.org>
+To: Ralf Baechle <ralf@linux-mips.org>
+Cc: linux-mips@linux-mips.org, John Crispin <blogic@openwrt.org>,
+ Gabor Juhos <juhosg@openwrt.org>, devicetree@vger.kernel.org
+Date: Fri,  9 Aug 2013 18:03:32 +0200
+
+The Ralink RT3883 SoCs have a built-in PCI Host Controller
+device. The patch adds a platform driver and device tree
+binding documentation for that.
+
+The patch also enables the HW_HAS_PCI config option. This
+is required in order to be able to enable the PCI support.
+
+Cc: devicetree@vger.kernel.org
+Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
+Acked-by: John Crispin <blogic@openwrt.org>
+
+---
+.../devicetree/bindings/pci/ralink,rt3883-pci.txt  |  169 ++++++
+ arch/mips/pci/Makefile                             |    1 +
+ arch/mips/pci/pci-rt3883.c                         |  636 ++++++++++++++++++++
+ arch/mips/ralink/Kconfig                           |    1 +
+ 4 files changed, 807 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/pci/ralink,rt3883-pci.txt
+ create mode 100644 arch/mips/pci/pci-rt3883.c
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/pci/ralink,rt3883-pci.txt
+@@ -0,0 +1,169 @@
++* Mediatek/Ralink RT3883 PCI controller
++
++1) Main node
++
++   Required properties:
++
++   - compatible: must be "ralink,rt3883-pci"
++
++   - reg: specifies the physical base address of the controller and
++     the length of the memory mapped region.
++
++   - #address-cells: specifies the number of cells needed to encode an
++     address. The value must be 1.
++
++   - #size-cells: specifies the number of cells used to represent the size
++     of an address. The value must be 1.
++
++   - ranges: specifies the translation between child address space and parent
++     address space
++
++   - status: either "disabled" or "okay"
++
++2) Child nodes
++
++   The main node must have two child nodes which describes the built-in
++   interrupt controller and the PCI host bridge.
++
++   a) Interrupt controller:
++
++   Required properties:
++
++   - interrupt-controller: identifies the node as an interrupt controller
++
++   - #address-cells: specifies the number of cells needed to encode an
++     address. The value must be 0. As such, 'interrupt-map' nodes do not
++     have to specify a parent unit address.
++
++   - #interrupt-cells: specifies the number of cells needed to encode an
++     interrupt source. The value must be 1.
++
++   - interrupt-parent: the phandle for the interrupt controller that
++     services interrupts for this device.
++
++   - interrupts: specifies the interrupt source of the parent interrupt
++     controller. The format of the interrupt specifier depends on the
++     parent interrupt controller.
++
++   b) PCI host bridge:
++
++   Required properties:
++
++   - #address-cells: specifies the number of cells needed to encode an
++     address. The value must be 0.
++
++   - #size-cells: specifies the number of cells used to represent the size
++     of an address. The value must be 2.
++
++   - #interrupt-cells: specifies the number of cells needed to encode an
++     interrupt source. The value must be 1.
++
++   - device_type: must be "pci"
++
++   - bus-range: PCI bus numbers covered
++
++   - ranges: specifies the ranges for the PCI memory and I/O regions
++
++   - interrupt-map-mask,
++   - interrupt-map: standard PCI properties to define the mapping of the
++     PCI interface to interrupt numbers.
++
++   The PCI host bridge node migh have additional sub-nodes representing
++   the onboard PCI devices/PCI slots. Each such sub-node must have the
++   following mandatory properties:
++
++     - reg: used only for interrupt mapping, so only the first four bytes
++       are used to refer to the correct bus number and device number.
++
++     - device_type: must be "pci"
++
++     - status: either "disabled" or "okay"
++
++   If a given sub-node represents a PCI bridge it must have following
++   mandatory properties as well:
++
++     - #address-cells: must be set to <3>
++
++     - #size-cells: must set to <2>
++
++     - #interrupt-cells: must be set to <1>
++
++     - interrupt-map-mask,
++     - interrupt-map: standard PCI properties to define the mapping of the
++       PCI interface to interrupt numbers.
++
++3) Example:
++
++	pci@10140000 {
++		compatible = "ralink,rt3883-pci";
++		reg = <0x10140000 0x20000>;
++		#address-cells = <1>;
++		#size-cells = <1>;
++		ranges; /* direct mapping */
++
++		status = "disabled";
++
++		pciintc: interrupt-controller {
++			interrupt-controller;
++			#address-cells = <0>;
++			#interrupt-cells = <1>;
++
++			interrupt-parent = <&cpuintc>;
++			interrupts = <4>;
++		};
++
++		host-bridge {
++			#address-cells = <3>;
++			#size-cells = <2>;
++			#interrupt-cells = <1>;
++
++			device_type = "pci";
++
++			bus-range = <0 255>;
++			ranges = <
++				0x02000000 0 0x00000000 0x20000000 0 0x10000000 /* pci memory */
++				0x01000000 0 0x00000000 0x10160000 0 0x00010000 /* io space */
++			>;
++
++			interrupt-map-mask = <0xf800 0 0 7>;
++			interrupt-map = <
++				/* IDSEL 17 */
++				0x8800 0 0 1 &pciintc 18
++				0x8800 0 0 2 &pciintc 18
++				0x8800 0 0 3 &pciintc 18
++				0x8800 0 0 4 &pciintc 18
++				/* IDSEL 18 */
++				0x9000 0 0 1 &pciintc 19
++				0x9000 0 0 2 &pciintc 19
++				0x9000 0 0 3 &pciintc 19
++				0x9000 0 0 4 &pciintc 19
++			>;
++
++			pci-bridge@1 {
++				reg = <0x0800 0 0 0 0>;
++				device_type = "pci";
++				#interrupt-cells = <1>;
++				#address-cells = <3>;
++				#size-cells = <2>;
++
++				interrupt-map-mask = <0x0 0 0 0>;
++				interrupt-map = <0x0 0 0 0 &pciintc 20>;
++
++				status = "disabled";
++			};
++
++			pci-slot@17 {
++				reg = <0x8800 0 0 0 0>;
++				device_type = "pci";
++
++				status = "disabled";
++			};
++
++			pci-slot@18 {
++				reg = <0x9000 0 0 0 0>;
++				device_type = "pci";
++
++				status = "disabled";
++			};
++		};
++	};
+--- a/arch/mips/pci/Makefile
++++ b/arch/mips/pci/Makefile
+@@ -41,6 +41,7 @@ obj-$(CONFIG_SIBYTE_BCM1x80)	+= pci-bcm1
+ obj-$(CONFIG_SNI_RM)		+= fixup-sni.o ops-sni.o
+ obj-$(CONFIG_LANTIQ)		+= fixup-lantiq.o
+ obj-$(CONFIG_PCI_LANTIQ)	+= pci-lantiq.o ops-lantiq.o
++obj-$(CONFIG_SOC_RT3883)	+= pci-rt3883.o
+ obj-$(CONFIG_TANBAC_TB0219)	+= fixup-tb0219.o
+ obj-$(CONFIG_TANBAC_TB0226)	+= fixup-tb0226.o
+ obj-$(CONFIG_TANBAC_TB0287)	+= fixup-tb0287.o
+--- /dev/null
++++ b/arch/mips/pci/pci-rt3883.c
+@@ -0,0 +1,636 @@
++/*
++ *  Ralink RT3662/RT3883 SoC PCI support
++ *
++ *  Copyright (C) 2011-2013 Gabor Juhos <juhosg@openwrt.org>
++ *
++ *  Parts of this file are based on Ralink's 2.6.21 BSP
++ *
++ *  This program is free software; you can redistribute it and/or modify it
++ *  under the terms of the GNU General Public License version 2 as published
++ *  by the Free Software Foundation.
++ */
++
++#include <linux/types.h>
++#include <linux/pci.h>
++#include <linux/io.h>
++#include <linux/init.h>
++#include <linux/delay.h>
++#include <linux/interrupt.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/of_irq.h>
++#include <linux/of_pci.h>
++#include <linux/platform_device.h>
++
++#include <asm/mach-ralink/rt3883.h>
++#include <asm/mach-ralink/ralink_regs.h>
++
++#define RT3883_MEMORY_BASE		0x00000000
++#define RT3883_MEMORY_SIZE		0x02000000
++
++#define RT3883_PCI_REG_PCICFG		0x00
++#define   RT3883_PCICFG_P2P_BR_DEVNUM_M 0xf
++#define   RT3883_PCICFG_P2P_BR_DEVNUM_S 16
++#define   RT3883_PCICFG_PCIRST		BIT(1)
++#define RT3883_PCI_REG_PCIRAW		0x04
++#define RT3883_PCI_REG_PCIINT		0x08
++#define RT3883_PCI_REG_PCIENA		0x0c
++
++#define RT3883_PCI_REG_CFGADDR		0x20
++#define RT3883_PCI_REG_CFGDATA		0x24
++#define RT3883_PCI_REG_MEMBASE		0x28
++#define RT3883_PCI_REG_IOBASE		0x2c
++#define RT3883_PCI_REG_ARBCTL		0x80
++
++#define RT3883_PCI_REG_BASE(_x)		(0x1000 + (_x) * 0x1000)
++#define RT3883_PCI_REG_BAR0SETUP(_x)	(RT3883_PCI_REG_BASE((_x)) + 0x10)
++#define RT3883_PCI_REG_IMBASEBAR0(_x)	(RT3883_PCI_REG_BASE((_x)) + 0x18)
++#define RT3883_PCI_REG_ID(_x)		(RT3883_PCI_REG_BASE((_x)) + 0x30)
++#define RT3883_PCI_REG_CLASS(_x)	(RT3883_PCI_REG_BASE((_x)) + 0x34)
++#define RT3883_PCI_REG_SUBID(_x)	(RT3883_PCI_REG_BASE((_x)) + 0x38)
++#define RT3883_PCI_REG_STATUS(_x)	(RT3883_PCI_REG_BASE((_x)) + 0x50)
++
++#define RT3883_PCI_MODE_NONE	0
++#define RT3883_PCI_MODE_PCI	BIT(0)
++#define RT3883_PCI_MODE_PCIE	BIT(1)
++#define RT3883_PCI_MODE_BOTH	(RT3883_PCI_MODE_PCI | RT3883_PCI_MODE_PCIE)
++
++#define RT3883_PCI_IRQ_COUNT	32
++
++#define RT3883_P2P_BR_DEVNUM	1
++
++struct rt3883_pci_controller {
++	void __iomem *base;
++	spinlock_t lock;
++
++	struct device_node *intc_of_node;
++	struct irq_domain *irq_domain;
++
++	struct pci_controller pci_controller;
++	struct resource io_res;
++	struct resource mem_res;
++
++	bool pcie_ready;
++};
++
++static inline struct rt3883_pci_controller *
++pci_bus_to_rt3883_controller(struct pci_bus *bus)
++{
++	struct pci_controller *hose;
++
++	hose = (struct pci_controller *) bus->sysdata;
++	return container_of(hose, struct rt3883_pci_controller, pci_controller);
++}
++
++static inline u32 rt3883_pci_r32(struct rt3883_pci_controller *rpc,
++				 unsigned reg)
++{
++	return ioread32(rpc->base + reg);
++}
++
++static inline void rt3883_pci_w32(struct rt3883_pci_controller *rpc,
++				  u32 val, unsigned reg)
++{
++	iowrite32(val, rpc->base + reg);
++}
++
++static inline u32 rt3883_pci_get_cfgaddr(unsigned int bus, unsigned int slot,
++					 unsigned int func, unsigned int where)
++{
++	return (bus << 16) | (slot << 11) | (func << 8) | (where & 0xfc) |
++	       0x80000000;
++}
++
++static u32 rt3883_pci_read_cfg32(struct rt3883_pci_controller *rpc,
++			       unsigned bus, unsigned slot,
++			       unsigned func, unsigned reg)
++{
++	unsigned long flags;
++	u32 address;
++	u32 ret;
++
++	address = rt3883_pci_get_cfgaddr(bus, slot, func, reg);
++
++	spin_lock_irqsave(&rpc->lock, flags);
++	rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR);
++	ret = rt3883_pci_r32(rpc, RT3883_PCI_REG_CFGDATA);
++	spin_unlock_irqrestore(&rpc->lock, flags);
++
++	return ret;
++}
++
++static void rt3883_pci_write_cfg32(struct rt3883_pci_controller *rpc,
++				 unsigned bus, unsigned slot,
++				 unsigned func, unsigned reg, u32 val)
++{
++	unsigned long flags;
++	u32 address;
++
++	address = rt3883_pci_get_cfgaddr(bus, slot, func, reg);
++
++	spin_lock_irqsave(&rpc->lock, flags);
++	rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR);
++	rt3883_pci_w32(rpc, val, RT3883_PCI_REG_CFGDATA);
++	spin_unlock_irqrestore(&rpc->lock, flags);
++}
++
++static void rt3883_pci_irq_handler(unsigned int irq, struct irq_desc *desc)
++{
++	struct rt3883_pci_controller *rpc;
++	u32 pending;
++
++	rpc = irq_get_handler_data(irq);
++
++	pending = rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIINT) &
++		  rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
++
++	if (!pending) {
++		spurious_interrupt();
++		return;
++	}
++
++	while (pending) {
++		unsigned bit = __ffs(pending);
++
++		irq = irq_find_mapping(rpc->irq_domain, bit);
++		generic_handle_irq(irq);
++
++		pending &= ~BIT(bit);
++	}
++}
++
++static void rt3883_pci_irq_unmask(struct irq_data *d)
++{
++	struct rt3883_pci_controller *rpc;
++	u32 t;
++
++	rpc = irq_data_get_irq_chip_data(d);
++
++	t = rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
++	rt3883_pci_w32(rpc, t | BIT(d->hwirq), RT3883_PCI_REG_PCIENA);
++	/* flush write */
++	rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
++}
++
++static void rt3883_pci_irq_mask(struct irq_data *d)
++{
++	struct rt3883_pci_controller *rpc;
++	u32 t;
++
++	rpc = irq_data_get_irq_chip_data(d);
++
++	t = rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
++	rt3883_pci_w32(rpc, t & ~BIT(d->hwirq), RT3883_PCI_REG_PCIENA);
++	/* flush write */
++	rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
++}
++
++static struct irq_chip rt3883_pci_irq_chip = {
++	.name		= "RT3883 PCI",
++	.irq_mask	= rt3883_pci_irq_mask,
++	.irq_unmask	= rt3883_pci_irq_unmask,
++	.irq_mask_ack	= rt3883_pci_irq_mask,
++};
++
++static int rt3883_pci_irq_map(struct irq_domain *d, unsigned int irq,
++			      irq_hw_number_t hw)
++{
++	irq_set_chip_and_handler(irq, &rt3883_pci_irq_chip, handle_level_irq);
++	irq_set_chip_data(irq, d->host_data);
++
++	return 0;
++}
++
++static const struct irq_domain_ops rt3883_pci_irq_domain_ops = {
++	.map = rt3883_pci_irq_map,
++	.xlate = irq_domain_xlate_onecell,
++};
++
++static int rt3883_pci_irq_init(struct device *dev,
++			       struct rt3883_pci_controller *rpc)
++{
++	int irq;
++
++	irq = irq_of_parse_and_map(rpc->intc_of_node, 0);
++	if (irq == 0) {
++		dev_err(dev, "%s has no IRQ",
++			of_node_full_name(rpc->intc_of_node));
++		return -EINVAL;
++	}
++
++	/* disable all interrupts */
++	rt3883_pci_w32(rpc, 0, RT3883_PCI_REG_PCIENA);
++
++	rpc->irq_domain =
++		irq_domain_add_linear(rpc->intc_of_node, RT3883_PCI_IRQ_COUNT,
++				      &rt3883_pci_irq_domain_ops,
++				      rpc);
++	if (!rpc->irq_domain) {
++		dev_err(dev, "unable to add IRQ domain\n");
++		return -ENODEV;
++	}
++
++	irq_set_handler_data(irq, rpc);
++	irq_set_chained_handler(irq, rt3883_pci_irq_handler);
++
++	return 0;
++}
++
++static int rt3883_pci_config_read(struct pci_bus *bus, unsigned int devfn,
++				  int where, int size, u32 *val)
++{
++	struct rt3883_pci_controller *rpc;
++	unsigned long flags;
++	u32 address;
++	u32 data;
++
++	rpc = pci_bus_to_rt3883_controller(bus);
++
++	if (!rpc->pcie_ready && bus->number == 1)
++		return PCIBIOS_DEVICE_NOT_FOUND;
++
++	address = rt3883_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn),
++					 PCI_FUNC(devfn), where);
++
++	spin_lock_irqsave(&rpc->lock, flags);
++	rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR);
++	data = rt3883_pci_r32(rpc, RT3883_PCI_REG_CFGDATA);
++	spin_unlock_irqrestore(&rpc->lock, flags);
++
++	switch (size) {
++	case 1:
++		*val = (data >> ((where & 3) << 3)) & 0xff;
++		break;
++	case 2:
++		*val = (data >> ((where & 3) << 3)) & 0xffff;
++		break;
++	case 4:
++		*val = data;
++		break;
++	}
++
++	return PCIBIOS_SUCCESSFUL;
++}
++
++static int rt3883_pci_config_write(struct pci_bus *bus, unsigned int devfn,
++				   int where, int size, u32 val)
++{
++	struct rt3883_pci_controller *rpc;
++	unsigned long flags;
++	u32 address;
++	u32 data;
++
++	rpc = pci_bus_to_rt3883_controller(bus);
++
++	if (!rpc->pcie_ready && bus->number == 1)
++		return PCIBIOS_DEVICE_NOT_FOUND;
++
++	address = rt3883_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn),
++					 PCI_FUNC(devfn), where);
++
++	spin_lock_irqsave(&rpc->lock, flags);
++	rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR);
++	data = rt3883_pci_r32(rpc, RT3883_PCI_REG_CFGDATA);
++
++	switch (size) {
++	case 1:
++		data = (data & ~(0xff << ((where & 3) << 3))) |
++		       (val << ((where & 3) << 3));
++		break;
++	case 2:
++		data = (data & ~(0xffff << ((where & 3) << 3))) |
++		       (val << ((where & 3) << 3));
++		break;
++	case 4:
++		data = val;
++		break;
++	}
++
++	rt3883_pci_w32(rpc, data, RT3883_PCI_REG_CFGDATA);
++	spin_unlock_irqrestore(&rpc->lock, flags);
++
++	return PCIBIOS_SUCCESSFUL;
++}
++
++static struct pci_ops rt3883_pci_ops = {
++	.read	= rt3883_pci_config_read,
++	.write	= rt3883_pci_config_write,
++};
++
++static void rt3883_pci_preinit(struct rt3883_pci_controller *rpc, unsigned mode)
++{
++	u32 syscfg1;
++	u32 rstctrl;
++	u32 clkcfg1;
++	u32 t;
++
++	rstctrl = rt_sysc_r32(RT3883_SYSC_REG_RSTCTRL);
++	syscfg1 = rt_sysc_r32(RT3883_SYSC_REG_SYSCFG1);
++	clkcfg1 = rt_sysc_r32(RT3883_SYSC_REG_CLKCFG1);
++
++	if (mode & RT3883_PCI_MODE_PCIE) {
++		rstctrl |= RT3883_RSTCTRL_PCIE;
++		rt_sysc_w32(rstctrl, RT3883_SYSC_REG_RSTCTRL);
++
++		/* setup PCI PAD drive mode */
++		syscfg1 &= ~(0x30);
++		syscfg1 |= (2 << 4);
++		rt_sysc_w32(syscfg1, RT3883_SYSC_REG_SYSCFG1);
++
++		t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN0);
++		t &= ~BIT(31);
++		rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN0);
++
++		t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN1);
++		t &= 0x80ffffff;
++		rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN1);
++
++		t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN1);
++		t |= 0xa << 24;
++		rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN1);
++
++		t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN0);
++		t |= BIT(31);
++		rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN0);
++
++		msleep(50);
++
++		rstctrl &= ~RT3883_RSTCTRL_PCIE;
++		rt_sysc_w32(rstctrl, RT3883_SYSC_REG_RSTCTRL);
++	}
++
++	syscfg1 |= (RT3883_SYSCFG1_PCIE_RC_MODE | RT3883_SYSCFG1_PCI_HOST_MODE);
++
++	clkcfg1 &= ~(RT3883_CLKCFG1_PCI_CLK_EN | RT3883_CLKCFG1_PCIE_CLK_EN);
++
++	if (mode & RT3883_PCI_MODE_PCI) {
++		clkcfg1 |= RT3883_CLKCFG1_PCI_CLK_EN;
++		rstctrl &= ~RT3883_RSTCTRL_PCI;
++	}
++
++	if (mode & RT3883_PCI_MODE_PCIE) {
++		clkcfg1 |= RT3883_CLKCFG1_PCIE_CLK_EN;
++		rstctrl &= ~RT3883_RSTCTRL_PCIE;
++	}
++
++	rt_sysc_w32(syscfg1, RT3883_SYSC_REG_SYSCFG1);
++	rt_sysc_w32(rstctrl, RT3883_SYSC_REG_RSTCTRL);
++	rt_sysc_w32(clkcfg1, RT3883_SYSC_REG_CLKCFG1);
++
++	msleep(500);
++
++	/*
++	 * setup the device number of the P2P bridge
++	 * and de-assert the reset line
++	 */
++	t = (RT3883_P2P_BR_DEVNUM << RT3883_PCICFG_P2P_BR_DEVNUM_S);
++	rt3883_pci_w32(rpc, t, RT3883_PCI_REG_PCICFG);
++
++	/* flush write */
++	rt3883_pci_r32(rpc, RT3883_PCI_REG_PCICFG);
++	msleep(500);
++
++	if (mode & RT3883_PCI_MODE_PCIE) {
++		msleep(500);
++
++		t = rt3883_pci_r32(rpc, RT3883_PCI_REG_STATUS(1));
++
++		rpc->pcie_ready = t & BIT(0);
++
++		if (!rpc->pcie_ready) {
++			/* reset the PCIe block */
++			t = rt_sysc_r32(RT3883_SYSC_REG_RSTCTRL);
++			t |= RT3883_RSTCTRL_PCIE;
++			rt_sysc_w32(t, RT3883_SYSC_REG_RSTCTRL);
++			t &= ~RT3883_RSTCTRL_PCIE;
++			rt_sysc_w32(t, RT3883_SYSC_REG_RSTCTRL);
++
++			/* turn off PCIe clock */
++			t = rt_sysc_r32(RT3883_SYSC_REG_CLKCFG1);
++			t &= ~RT3883_CLKCFG1_PCIE_CLK_EN;
++			rt_sysc_w32(t, RT3883_SYSC_REG_CLKCFG1);
++
++			t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN0);
++			t &= ~0xf000c080;
++			rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN0);
++		}
++	}
++
++	/* enable PCI arbiter */
++	rt3883_pci_w32(rpc, 0x79, RT3883_PCI_REG_ARBCTL);
++}
++
++static int rt3883_pci_probe(struct platform_device *pdev)
++{
++	struct rt3883_pci_controller *rpc;
++	struct device *dev = &pdev->dev;
++	struct device_node *np = dev->of_node;
++	struct resource *res;
++	struct device_node *child;
++	u32 val;
++	int err;
++	int mode;
++
++	rpc = devm_kzalloc(dev, sizeof(*rpc), GFP_KERNEL);
++	if (!rpc)
++		return -ENOMEM;
++
++	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++	if (!res)
++		return -EINVAL;
++
++	rpc->base = devm_ioremap_resource(dev, res);
++	if (IS_ERR(rpc->base))
++		return PTR_ERR(rpc->base);
++
++	/* find the interrupt controller child node */
++	for_each_child_of_node(np, child) {
++		if (of_get_property(child, "interrupt-controller", NULL) &&
++		    of_node_get(child)) {
++			rpc->intc_of_node = child;
++			break;
++		}
++	}
++
++	if (!rpc->intc_of_node) {
++		dev_err(dev, "% has no %s child node",
++			of_node_full_name(rpc->intc_of_node),
++			"interrupt controller");
++		return -EINVAL;
++	}
++
++	/* find the PCI host bridge child node */
++	for_each_child_of_node(np, child) {
++		if (child->type &&
++		    of_node_cmp(child->type, "pci") == 0 &&
++		    of_node_get(child)) {
++			rpc->pci_controller.of_node = child;
++			break;
++		}
++	}
++
++	if (!rpc->pci_controller.of_node) {
++		dev_err(dev, "%s has no %s child node",
++			of_node_full_name(rpc->intc_of_node),
++			"PCI host bridge");
++		err = -EINVAL;
++		goto err_put_intc_node;
++	}
++
++	mode = RT3883_PCI_MODE_NONE;
++	for_each_available_child_of_node(rpc->pci_controller.of_node, child) {
++		int devfn;
++
++		if (!child->type ||
++		    of_node_cmp(child->type, "pci") != 0)
++			continue;
++
++		devfn = of_pci_get_devfn(child);
++		if (devfn < 0)
++			continue;
++
++		switch (PCI_SLOT(devfn)) {
++		case 1:
++			mode |= RT3883_PCI_MODE_PCIE;
++			break;
++
++		case 17:
++		case 18:
++			mode |= RT3883_PCI_MODE_PCI;
++			break;
++		}
++	}
++
++	if (mode == RT3883_PCI_MODE_NONE) {
++		dev_err(dev, "unable to determine PCI mode\n");
++		err = -EINVAL;
++		goto err_put_hb_node;
++	}
++
++	dev_info(dev, "mode:%s%s\n",
++		 (mode & RT3883_PCI_MODE_PCI) ? " PCI" : "",
++		 (mode & RT3883_PCI_MODE_PCIE) ? " PCIe" : "");
++
++	rt3883_pci_preinit(rpc, mode);
++
++	rpc->pci_controller.pci_ops = &rt3883_pci_ops;
++	rpc->pci_controller.io_resource = &rpc->io_res;
++	rpc->pci_controller.mem_resource = &rpc->mem_res;
++
++	/* Load PCI I/O and memory resources from DT */
++	pci_load_of_ranges(&rpc->pci_controller,
++			   rpc->pci_controller.of_node);
++
++	rt3883_pci_w32(rpc, rpc->mem_res.start, RT3883_PCI_REG_MEMBASE);
++	rt3883_pci_w32(rpc, rpc->io_res.start, RT3883_PCI_REG_IOBASE);
++
++	ioport_resource.start = rpc->io_res.start;
++	ioport_resource.end = rpc->io_res.end;
++
++	/* PCI */
++	rt3883_pci_w32(rpc, 0x03ff0000, RT3883_PCI_REG_BAR0SETUP(0));
++	rt3883_pci_w32(rpc, RT3883_MEMORY_BASE, RT3883_PCI_REG_IMBASEBAR0(0));
++	rt3883_pci_w32(rpc, 0x08021814, RT3883_PCI_REG_ID(0));
++	rt3883_pci_w32(rpc, 0x00800001, RT3883_PCI_REG_CLASS(0));
++	rt3883_pci_w32(rpc, 0x28801814, RT3883_PCI_REG_SUBID(0));
++
++	/* PCIe */
++	rt3883_pci_w32(rpc, 0x03ff0000, RT3883_PCI_REG_BAR0SETUP(1));
++	rt3883_pci_w32(rpc, RT3883_MEMORY_BASE, RT3883_PCI_REG_IMBASEBAR0(1));
++	rt3883_pci_w32(rpc, 0x08021814, RT3883_PCI_REG_ID(1));
++	rt3883_pci_w32(rpc, 0x06040001, RT3883_PCI_REG_CLASS(1));
++	rt3883_pci_w32(rpc, 0x28801814, RT3883_PCI_REG_SUBID(1));
++
++	err = rt3883_pci_irq_init(dev, rpc);
++	if (err)
++		goto err_put_hb_node;
++
++	/* PCIe */
++	val = rt3883_pci_read_cfg32(rpc, 0, 0x01, 0, PCI_COMMAND);
++	val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
++	rt3883_pci_write_cfg32(rpc, 0, 0x01, 0, PCI_COMMAND, val);
++
++	/* PCI */
++	val = rt3883_pci_read_cfg32(rpc, 0, 0x00, 0, PCI_COMMAND);
++	val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
++	rt3883_pci_write_cfg32(rpc, 0, 0x00, 0, PCI_COMMAND, val);
++
++	if (mode == RT3883_PCI_MODE_PCIE) {
++		rt3883_pci_w32(rpc, 0x03ff0001, RT3883_PCI_REG_BAR0SETUP(0));
++		rt3883_pci_w32(rpc, 0x03ff0001, RT3883_PCI_REG_BAR0SETUP(1));
++
++		rt3883_pci_write_cfg32(rpc, 0, RT3883_P2P_BR_DEVNUM, 0,
++				       PCI_BASE_ADDRESS_0,
++				       RT3883_MEMORY_BASE);
++		/* flush write */
++		rt3883_pci_read_cfg32(rpc, 0, RT3883_P2P_BR_DEVNUM, 0,
++				      PCI_BASE_ADDRESS_0);
++	} else {
++		rt3883_pci_write_cfg32(rpc, 0, RT3883_P2P_BR_DEVNUM, 0,
++				       PCI_IO_BASE, 0x00000101);
++	}
++
++	register_pci_controller(&rpc->pci_controller);
++
++	return 0;
++
++err_put_hb_node:
++	of_node_put(rpc->pci_controller.of_node);
++err_put_intc_node:
++	of_node_put(rpc->intc_of_node);
++	return err;
++}
++
++int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
++{
++	struct of_irq dev_irq;
++	int err;
++	int irq;
++
++	err = of_irq_map_pci(dev, &dev_irq);
++	if (err) {
++		pr_err("pci %s: unable to get irq map, err=%d\n",
++		       pci_name((struct pci_dev *) dev), err);
++		return 0;
++	}
++
++	irq = irq_create_of_mapping(dev_irq.controller,
++				    dev_irq.specifier,
++				    dev_irq.size);
++
++	if (irq == 0)
++		pr_crit("pci %s: no irq found for pin %u\n",
++			pci_name((struct pci_dev *) dev), pin);
++	else
++		pr_info("pci %s: using irq %d for pin %u\n",
++			pci_name((struct pci_dev *) dev), irq, pin);
++
++	return irq;
++}
++
++int pcibios_plat_dev_init(struct pci_dev *dev)
++{
++	return 0;
++}
++
++static const struct of_device_id rt3883_pci_ids[] = {
++	{ .compatible = "ralink,rt3883-pci" },
++	{},
++};
++MODULE_DEVICE_TABLE(of, rt3883_pci_ids);
++
++static struct platform_driver rt3883_pci_driver = {
++	.probe = rt3883_pci_probe,
++	.driver = {
++		.name = "rt3883-pci",
++		.owner = THIS_MODULE,
++		.of_match_table = of_match_ptr(rt3883_pci_ids),
++	},
++};
++
++static int __init rt3883_pci_init(void)
++{
++	return platform_driver_register(&rt3883_pci_driver);
++}
++
++postcore_initcall(rt3883_pci_init);
+--- a/arch/mips/ralink/Kconfig
++++ b/arch/mips/ralink/Kconfig
+@@ -26,6 +26,7 @@ choice
+ 		bool "RT3883"
+ 		select USB_ARCH_HAS_OHCI
+ 		select USB_ARCH_HAS_EHCI
++		select HW_HAS_PCI
+ 
+ 	config SOC_MT7620
+ 		bool "MT7620"