imx6: update PCIe driver

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Luka Perkov <luka@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38080 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 631 insertions, 2 deletions

diff --git a/target/linux/imx6/files-3.10/arch/arm/boot/dts/imx6q-gw5400-a.dts b/target/linux/imx6/files-3.10/arch/arm/boot/dts/imx6q-gw5400-a.dts
index d79d272b64..ce30969c2e 100644
--- a/target/linux/imx6/files-3.10/arch/arm/boot/dts/imx6q-gw5400-a.dts
+++ b/target/linux/imx6/files-3.10/arch/arm/boot/dts/imx6q-gw5400-a.dts
@@ -271,8 +271,7 @@
 };
 
 &pcie {
-	rst-gpios = <&gpio1 29 0>; /* PCIESWT_RST# */
-	clken-gpios = <&gpio1 20 0>; /* not used */
+	reset-gpios = <&gpio1 29 0>;
 	status = "okay";
 
 	eth1: sky2@8 { /* MAC/PHY on bus 8 */
diff --git a/target/linux/imx6/files-3.10/drivers/pci/host/pcie-designware.c b/target/linux/imx6/files-3.10/drivers/pci/host/pcie-designware.c
new file mode 100644
index 0000000000..c10e9ac9bb
--- /dev/null
+++ b/target/linux/imx6/files-3.10/drivers/pci/host/pcie-designware.c
@@ -0,0 +1,565 @@
+/*
+ * Synopsys Designware PCIe host controller driver
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Author: Jingoo Han <jg1.han@samsung.com>
+ *
+ * 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/kernel.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/pci.h>
+#include <linux/pci_regs.h>
+#include <linux/types.h>
+
+#include "pcie-designware.h"
+
+/* Synopsis specific PCIE configuration registers */
+#define PCIE_PORT_LINK_CONTROL		0x710
+#define PORT_LINK_MODE_MASK		(0x3f << 16)
+#define PORT_LINK_MODE_1_LANES		(0x1 << 16)
+#define PORT_LINK_MODE_2_LANES		(0x3 << 16)
+#define PORT_LINK_MODE_4_LANES		(0x7 << 16)
+
+#define PCIE_LINK_WIDTH_SPEED_CONTROL	0x80C
+#define PORT_LOGIC_SPEED_CHANGE		(0x1 << 17)
+#define PORT_LOGIC_LINK_WIDTH_MASK	(0x1ff << 8)
+#define PORT_LOGIC_LINK_WIDTH_1_LANES	(0x1 << 8)
+#define PORT_LOGIC_LINK_WIDTH_2_LANES	(0x2 << 8)
+#define PORT_LOGIC_LINK_WIDTH_4_LANES	(0x4 << 8)
+
+#define PCIE_MSI_ADDR_LO		0x820
+#define PCIE_MSI_ADDR_HI		0x824
+#define PCIE_MSI_INTR0_ENABLE		0x828
+#define PCIE_MSI_INTR0_MASK		0x82C
+#define PCIE_MSI_INTR0_STATUS		0x830
+
+#define PCIE_ATU_VIEWPORT		0x900
+#define PCIE_ATU_REGION_INBOUND		(0x1 << 31)
+#define PCIE_ATU_REGION_OUTBOUND	(0x0 << 31)
+#define PCIE_ATU_REGION_INDEX1		(0x1 << 0)
+#define PCIE_ATU_REGION_INDEX0		(0x0 << 0)
+#define PCIE_ATU_CR1			0x904
+#define PCIE_ATU_TYPE_MEM		(0x0 << 0)
+#define PCIE_ATU_TYPE_IO		(0x2 << 0)
+#define PCIE_ATU_TYPE_CFG0		(0x4 << 0)
+#define PCIE_ATU_TYPE_CFG1		(0x5 << 0)
+#define PCIE_ATU_CR2			0x908
+#define PCIE_ATU_ENABLE			(0x1 << 31)
+#define PCIE_ATU_BAR_MODE_ENABLE	(0x1 << 30)
+#define PCIE_ATU_LOWER_BASE		0x90C
+#define PCIE_ATU_UPPER_BASE		0x910
+#define PCIE_ATU_LIMIT			0x914
+#define PCIE_ATU_LOWER_TARGET		0x918
+#define PCIE_ATU_BUS(x)			(((x) & 0xff) << 24)
+#define PCIE_ATU_DEV(x)			(((x) & 0x1f) << 19)
+#define PCIE_ATU_FUNC(x)		(((x) & 0x7) << 16)
+#define PCIE_ATU_UPPER_TARGET		0x91C
+
+static struct hw_pci dw_pci;
+
+unsigned long global_io_offset;
+
+static inline struct pcie_port *sys_to_pcie(struct pci_sys_data *sys)
+{
+	return sys->private_data;
+}
+
+int cfg_read(void __iomem *addr, int where, int size, u32 *val)
+{
+	*val = readl(addr);
+
+	if (size == 1)
+		*val = (*val >> (8 * (where & 3))) & 0xff;
+	else if (size == 2)
+		*val = (*val >> (8 * (where & 3))) & 0xffff;
+	else if (size != 4)
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int cfg_write(void __iomem *addr, int where, int size, u32 val)
+{
+	if (size == 4)
+		writel(val, addr);
+	else if (size == 2)
+		writew(val, addr + (where & 2));
+	else if (size == 1)
+		writeb(val, addr + (where & 3));
+	else
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static inline void dw_pcie_readl_rc(struct pcie_port *pp, u32 reg, u32 *val)
+{
+	if (pp->ops->readl_rc)
+		pp->ops->readl_rc(pp, pp->dbi_base + reg, val);
+	else
+		*val = readl(pp->dbi_base + reg);
+}
+
+static inline void dw_pcie_writel_rc(struct pcie_port *pp, u32 val, u32 reg)
+{
+	if (pp->ops->writel_rc)
+		pp->ops->writel_rc(pp, val, pp->dbi_base + reg);
+	else
+		writel(val, pp->dbi_base + reg);
+}
+
+int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
+				u32 *val)
+{
+	int ret;
+
+	if (pp->ops->rd_own_conf)
+		ret = pp->ops->rd_own_conf(pp, where, size, val);
+	else
+		ret = cfg_read(pp->dbi_base + (where & ~0x3), where, size, val);
+
+	return ret;
+}
+
+int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
+				u32 val)
+{
+	int ret;
+
+	if (pp->ops->wr_own_conf)
+		ret = pp->ops->wr_own_conf(pp, where, size, val);
+	else
+		ret = cfg_write(pp->dbi_base + (where & ~0x3), where, size,
+				val);
+
+	return ret;
+}
+
+int dw_pcie_link_up(struct pcie_port *pp)
+{
+	if (pp->ops->link_up)
+		return pp->ops->link_up(pp);
+	else
+		return 0;
+}
+
+int __init dw_pcie_host_init(struct pcie_port *pp)
+{
+	struct device_node *np = pp->dev->of_node;
+	struct of_pci_range range;
+	struct of_pci_range_parser parser;
+	u32 val;
+
+	if (of_pci_range_parser_init(&parser, np)) {
+		dev_err(pp->dev, "missing ranges property\n");
+		return -EINVAL;
+	}
+
+	/* Get the I/O and memory ranges from DT */
+	for_each_of_pci_range(&parser, &range) {
+		unsigned long restype = range.flags & IORESOURCE_TYPE_BITS;
+		if (restype == IORESOURCE_IO) {
+			of_pci_range_to_resource(&range, np, &pp->io);
+			pp->io.name = "I/O";
+			pp->io.start = max_t(resource_size_t,
+					     PCIBIOS_MIN_IO,
+					     range.pci_addr + global_io_offset);
+			pp->io.end = min_t(resource_size_t,
+					   IO_SPACE_LIMIT,
+					   range.pci_addr + range.size
+					   + global_io_offset);
+			pp->config.io_size = resource_size(&pp->io);
+			pp->config.io_bus_addr = range.pci_addr;
+		}
+		if (restype == IORESOURCE_MEM) {
+			of_pci_range_to_resource(&range, np, &pp->mem);
+			pp->mem.name = "MEM";
+			pp->config.mem_size = resource_size(&pp->mem);
+			pp->config.mem_bus_addr = range.pci_addr;
+		}
+		if (restype == 0) {
+			of_pci_range_to_resource(&range, np, &pp->cfg);
+			pp->config.cfg0_size = resource_size(&pp->cfg)/2;
+			pp->config.cfg1_size = resource_size(&pp->cfg)/2;
+		}
+	}
+
+	if (!pp->dbi_base) {
+		pp->dbi_base = devm_ioremap(pp->dev, pp->cfg.start,
+					resource_size(&pp->cfg));
+		if (!pp->dbi_base) {
+			dev_err(pp->dev, "error with ioremap\n");
+			return -ENOMEM;
+		}
+	}
+
+	pp->cfg0_base = pp->cfg.start;
+	pp->cfg1_base = pp->cfg.start + pp->config.cfg0_size;
+	pp->io_base = pp->io.start;
+	pp->mem_base = pp->mem.start;
+
+	pp->va_cfg0_base = devm_ioremap(pp->dev, pp->cfg0_base,
+					pp->config.cfg0_size);
+	if (!pp->va_cfg0_base) {
+		dev_err(pp->dev, "error with ioremap in function\n");
+		return -ENOMEM;
+	}
+	pp->va_cfg1_base = devm_ioremap(pp->dev, pp->cfg1_base,
+					pp->config.cfg1_size);
+	if (!pp->va_cfg1_base) {
+		dev_err(pp->dev, "error with ioremap\n");
+		return -ENOMEM;
+	}
+
+	if (of_property_read_u32(np, "num-lanes", &pp->lanes)) {
+		dev_err(pp->dev, "Failed to parse the number of lanes\n");
+		return -EINVAL;
+	}
+
+	if (pp->ops->host_init)
+		pp->ops->host_init(pp);
+
+	dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0);
+
+	/* program correct class for RC */
+	dw_pcie_wr_own_conf(pp, PCI_CLASS_DEVICE, 2, PCI_CLASS_BRIDGE_PCI);
+
+	dw_pcie_rd_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, &val);
+	val |= PORT_LOGIC_SPEED_CHANGE;
+	dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val);
+
+	dw_pci.nr_controllers = 1;
+	dw_pci.private_data = (void **)&pp;
+
+	pci_common_init(&dw_pci);
+	pci_assign_unassigned_resources();
+#ifdef CONFIG_PCI_DOMAINS
+	dw_pci.domain++;
+#endif
+
+	return 0;
+}
+
+static void dw_pcie_prog_viewport_cfg0(struct pcie_port *pp, u32 busdev)
+{
+	/* Program viewport 0 : OUTBOUND : CFG0 */
+	dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX0,
+			  PCIE_ATU_VIEWPORT);
+	dw_pcie_writel_rc(pp, pp->cfg0_base, PCIE_ATU_LOWER_BASE);
+	dw_pcie_writel_rc(pp, (pp->cfg0_base >> 32), PCIE_ATU_UPPER_BASE);
+	dw_pcie_writel_rc(pp, pp->cfg0_base + pp->config.cfg0_size - 1,
+			  PCIE_ATU_LIMIT);
+	dw_pcie_writel_rc(pp, busdev, PCIE_ATU_LOWER_TARGET);
+	dw_pcie_writel_rc(pp, 0, PCIE_ATU_UPPER_TARGET);
+	dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_CFG0, PCIE_ATU_CR1);
+	dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
+}
+
+static void dw_pcie_prog_viewport_cfg1(struct pcie_port *pp, u32 busdev)
+{
+	/* Program viewport 1 : OUTBOUND : CFG1 */
+	dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX1,
+			  PCIE_ATU_VIEWPORT);
+	dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_CFG1, PCIE_ATU_CR1);
+	dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
+	dw_pcie_writel_rc(pp, pp->cfg1_base, PCIE_ATU_LOWER_BASE);
+	dw_pcie_writel_rc(pp, (pp->cfg1_base >> 32), PCIE_ATU_UPPER_BASE);
+	dw_pcie_writel_rc(pp, pp->cfg1_base + pp->config.cfg1_size - 1,
+			  PCIE_ATU_LIMIT);
+	dw_pcie_writel_rc(pp, busdev, PCIE_ATU_LOWER_TARGET);
+	dw_pcie_writel_rc(pp, 0, PCIE_ATU_UPPER_TARGET);
+}
+
+static void dw_pcie_prog_viewport_mem_outbound(struct pcie_port *pp)
+{
+	/* Program viewport 0 : OUTBOUND : MEM */
+	dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX0,
+			  PCIE_ATU_VIEWPORT);
+	dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_MEM, PCIE_ATU_CR1);
+	dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
+	dw_pcie_writel_rc(pp, pp->mem_base, PCIE_ATU_LOWER_BASE);
+	dw_pcie_writel_rc(pp, (pp->mem_base >> 32), PCIE_ATU_UPPER_BASE);
+	dw_pcie_writel_rc(pp, pp->mem_base + pp->config.mem_size - 1,
+			  PCIE_ATU_LIMIT);
+	dw_pcie_writel_rc(pp, pp->config.mem_bus_addr, PCIE_ATU_LOWER_TARGET);
+	dw_pcie_writel_rc(pp, upper_32_bits(pp->config.mem_bus_addr),
+			  PCIE_ATU_UPPER_TARGET);
+}
+
+static void dw_pcie_prog_viewport_io_outbound(struct pcie_port *pp)
+{
+	/* Program viewport 1 : OUTBOUND : IO */
+	dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX1,
+			  PCIE_ATU_VIEWPORT);
+	dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_IO, PCIE_ATU_CR1);
+	dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
+	dw_pcie_writel_rc(pp, pp->io_base, PCIE_ATU_LOWER_BASE);
+	dw_pcie_writel_rc(pp, (pp->io_base >> 32), PCIE_ATU_UPPER_BASE);
+	dw_pcie_writel_rc(pp, pp->io_base + pp->config.io_size - 1,
+			  PCIE_ATU_LIMIT);
+	dw_pcie_writel_rc(pp, pp->config.io_bus_addr, PCIE_ATU_LOWER_TARGET);
+	dw_pcie_writel_rc(pp, upper_32_bits(pp->config.io_bus_addr),
+			  PCIE_ATU_UPPER_TARGET);
+}
+
+static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
+		u32 devfn, int where, int size, u32 *val)
+{
+	int ret = PCIBIOS_SUCCESSFUL;
+	u32 address, busdev;
+
+	busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
+		 PCIE_ATU_FUNC(PCI_FUNC(devfn));
+	address = where & ~0x3;
+
+	if (bus->parent->number == pp->root_bus_nr) {
+		dw_pcie_prog_viewport_cfg0(pp, busdev);
+		ret = cfg_read(pp->va_cfg0_base + address, where, size, val);
+		dw_pcie_prog_viewport_mem_outbound(pp);
+	} else {
+		dw_pcie_prog_viewport_cfg1(pp, busdev);
+		ret = cfg_read(pp->va_cfg1_base + address, where, size, val);
+		dw_pcie_prog_viewport_io_outbound(pp);
+	}
+
+	return ret;
+}
+
+static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
+		u32 devfn, int where, int size, u32 val)
+{
+	int ret = PCIBIOS_SUCCESSFUL;
+	u32 address, busdev;
+
+	busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
+		 PCIE_ATU_FUNC(PCI_FUNC(devfn));
+	address = where & ~0x3;
+
+	if (bus->parent->number == pp->root_bus_nr) {
+		dw_pcie_prog_viewport_cfg0(pp, busdev);
+		ret = cfg_write(pp->va_cfg0_base + address, where, size, val);
+		dw_pcie_prog_viewport_mem_outbound(pp);
+	} else {
+		dw_pcie_prog_viewport_cfg1(pp, busdev);
+		ret = cfg_write(pp->va_cfg1_base + address, where, size, val);
+		dw_pcie_prog_viewport_io_outbound(pp);
+	}
+
+	return ret;
+}
+
+
+static int dw_pcie_valid_config(struct pcie_port *pp,
+				struct pci_bus *bus, int dev)
+{
+	/* If there is no link, then there is no device */
+	if (bus->number != pp->root_bus_nr) {
+		if (!dw_pcie_link_up(pp))
+			return 0;
+	}
+
+	/* access only one slot on each root port */
+	if (bus->number == pp->root_bus_nr && dev > 0)
+		return 0;
+
+	/*
+	 * do not read more than one device on the bus directly attached
+	 * to RC's (Virtual Bridge's) DS side.
+	 */
+	if (bus->primary == pp->root_bus_nr && dev > 0)
+		return 0;
+
+	return 1;
+}
+
+static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
+			int size, u32 *val)
+{
+	struct pcie_port *pp = sys_to_pcie(bus->sysdata);
+	unsigned long flags;
+	int ret;
+
+	if (!pp) {
+		BUG();
+		return -EINVAL;
+	}
+
+	if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0) {
+		*val = 0xffffffff;
+		return PCIBIOS_DEVICE_NOT_FOUND;
+	}
+
+	spin_lock_irqsave(&pp->conf_lock, flags);
+	if (bus->number != pp->root_bus_nr)
+		ret = dw_pcie_rd_other_conf(pp, bus, devfn,
+						where, size, val);
+	else
+		ret = dw_pcie_rd_own_conf(pp, where, size, val);
+	spin_unlock_irqrestore(&pp->conf_lock, flags);
+
+	return ret;
+}
+
+static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
+			int where, int size, u32 val)
+{
+	struct pcie_port *pp = sys_to_pcie(bus->sysdata);
+	unsigned long flags;
+	int ret;
+
+	if (!pp) {
+		BUG();
+		return -EINVAL;
+	}
+
+	if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0)
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	spin_lock_irqsave(&pp->conf_lock, flags);
+	if (bus->number != pp->root_bus_nr)
+		ret = dw_pcie_wr_other_conf(pp, bus, devfn,
+						where, size, val);
+	else
+		ret = dw_pcie_wr_own_conf(pp, where, size, val);
+	spin_unlock_irqrestore(&pp->conf_lock, flags);
+
+	return ret;
+}
+
+static struct pci_ops dw_pcie_ops = {
+	.read = dw_pcie_rd_conf,
+	.write = dw_pcie_wr_conf,
+};
+
+int dw_pcie_setup(int nr, struct pci_sys_data *sys)
+{
+	struct pcie_port *pp;
+
+	pp = sys_to_pcie(sys);
+
+	if (!pp)
+		return 0;
+
+	if (global_io_offset < SZ_1M && pp->config.io_size > 0) {
+		sys->io_offset = global_io_offset - pp->config.io_bus_addr;
+		pci_ioremap_io(sys->io_offset, pp->io.start);
+		global_io_offset += SZ_64K;
+		pci_add_resource_offset(&sys->resources, &pp->io,
+					sys->io_offset);
+	}
+
+	sys->mem_offset = pp->mem.start - pp->config.mem_bus_addr;
+	pci_add_resource_offset(&sys->resources, &pp->mem, sys->mem_offset);
+
+	return 1;
+}
+
+struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys)
+{
+	struct pci_bus *bus;
+	struct pcie_port *pp = sys_to_pcie(sys);
+
+	if (pp) {
+		pp->root_bus_nr = sys->busnr;
+		bus = pci_scan_root_bus(NULL, sys->busnr, &dw_pcie_ops,
+					sys, &sys->resources);
+	} else {
+		bus = NULL;
+		BUG();
+	}
+
+	return bus;
+}
+
+int dw_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+	struct pcie_port *pp = sys_to_pcie(dev->bus->sysdata);
+
+	return pp->irq;
+}
+
+static struct hw_pci dw_pci = {
+	.setup		= dw_pcie_setup,
+	.scan		= dw_pcie_scan_bus,
+	.map_irq	= dw_pcie_map_irq,
+};
+
+void dw_pcie_setup_rc(struct pcie_port *pp)
+{
+	struct pcie_port_info *config = &pp->config;
+	u32 val;
+	u32 membase;
+	u32 memlimit;
+
+	/* set the number of lines as 4 */
+	dw_pcie_readl_rc(pp, PCIE_PORT_LINK_CONTROL, &val);
+	val &= ~PORT_LINK_MODE_MASK;
+	switch (pp->lanes) {
+	case 1:
+		val |= PORT_LINK_MODE_1_LANES;
+		break;
+	case 2:
+		val |= PORT_LINK_MODE_2_LANES;
+		break;
+	case 4:
+		val |= PORT_LINK_MODE_4_LANES;
+		break;
+	}
+	dw_pcie_writel_rc(pp, val, PCIE_PORT_LINK_CONTROL);
+
+	/* set link width speed control register */
+	dw_pcie_readl_rc(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, &val);
+	val &= ~PORT_LOGIC_LINK_WIDTH_MASK;
+	switch (pp->lanes) {
+	case 1:
+		val |= PORT_LOGIC_LINK_WIDTH_1_LANES;
+		break;
+	case 2:
+		val |= PORT_LOGIC_LINK_WIDTH_2_LANES;
+		break;
+	case 4:
+		val |= PORT_LOGIC_LINK_WIDTH_4_LANES;
+		break;
+	}
+	dw_pcie_writel_rc(pp, val, PCIE_LINK_WIDTH_SPEED_CONTROL);
+
+	/* setup RC BARs */
+	dw_pcie_writel_rc(pp, 0x00000004, PCI_BASE_ADDRESS_0);
+	dw_pcie_writel_rc(pp, 0x00000004, PCI_BASE_ADDRESS_1);
+
+	/* setup interrupt pins */
+	dw_pcie_readl_rc(pp, PCI_INTERRUPT_LINE, &val);
+	val &= 0xffff00ff;
+	val |= 0x00000100;
+	dw_pcie_writel_rc(pp, val, PCI_INTERRUPT_LINE);
+
+	/* setup bus numbers */
+	dw_pcie_readl_rc(pp, PCI_PRIMARY_BUS, &val);
+	val &= 0xff000000;
+	val |= 0x00010100;
+	dw_pcie_writel_rc(pp, val, PCI_PRIMARY_BUS);
+
+	/* setup memory base, memory limit */
+	membase = ((u32)pp->mem_base & 0xfff00000) >> 16;
+	memlimit = (config->mem_size + (u32)pp->mem_base) & 0xfff00000;
+	val = memlimit | membase;
+	dw_pcie_writel_rc(pp, val, PCI_MEMORY_BASE);
+
+	/* setup command register */
+	dw_pcie_readl_rc(pp, PCI_COMMAND, &val);
+	val &= 0xffff0000;
+	val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
+		PCI_COMMAND_MASTER | PCI_COMMAND_SERR;
+	dw_pcie_writel_rc(pp, val, PCI_COMMAND);
+}
+
+MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
+MODULE_DESCRIPTION("Designware PCIe host controller driver");
+MODULE_LICENSE("GPL v2");
diff --git a/target/linux/imx6/files-3.10/drivers/pci/host/pcie-designware.h b/target/linux/imx6/files-3.10/drivers/pci/host/pcie-designware.h
new file mode 100644
index 0000000000..133820f1da
--- /dev/null
+++ b/target/linux/imx6/files-3.10/drivers/pci/host/pcie-designware.h
@@ -0,0 +1,65 @@
+/*
+ * Synopsys Designware PCIe host controller driver
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Author: Jingoo Han <jg1.han@samsung.com>
+ *
+ * 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.
+ */
+
+struct pcie_port_info {
+	u32		cfg0_size;
+	u32		cfg1_size;
+	u32		io_size;
+	u32		mem_size;
+	phys_addr_t	io_bus_addr;
+	phys_addr_t	mem_bus_addr;
+};
+
+struct pcie_port {
+	struct device		*dev;
+	u8			root_bus_nr;
+	void __iomem		*dbi_base;
+	u64			cfg0_base;
+	void __iomem		*va_cfg0_base;
+	u64			cfg1_base;
+	void __iomem		*va_cfg1_base;
+	u64			io_base;
+	u64			mem_base;
+	spinlock_t		conf_lock;
+	struct resource		cfg;
+	struct resource		io;
+	struct resource		mem;
+	struct pcie_port_info	config;
+	int			irq;
+	u32			lanes;
+	struct pcie_host_ops	*ops;
+};
+
+struct pcie_host_ops {
+	void (*readl_rc)(struct pcie_port *pp,
+			void __iomem *dbi_base, u32 *val);
+	void (*writel_rc)(struct pcie_port *pp,
+			u32 val, void __iomem *dbi_base);
+	int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val);
+	int (*wr_own_conf)(struct pcie_port *pp, int where, int size, u32 val);
+	int (*link_up)(struct pcie_port *pp);
+	void (*host_init)(struct pcie_port *pp);
+};
+
+extern unsigned long global_io_offset;
+
+int cfg_read(void __iomem *addr, int where, int size, u32 *val);
+int cfg_write(void __iomem *addr, int where, int size, u32 val);
+int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size, u32 val);
+int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size, u32 *val);
+int dw_pcie_link_up(struct pcie_port *pp);
+void dw_pcie_setup_rc(struct pcie_port *pp);
+int dw_pcie_host_init(struct pcie_port *pp);
+int dw_pcie_setup(int nr, struct pci_sys_data *sys);
+struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys);
+int dw_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);