[PATCH v7 1/7] PCI: rockchip: Separate common code from RC driver

[Shawn Lin <shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>]

In preparation for introducing EP driver for Rockchip PCIe controller,
we rename the RC driver from pcie-rockchip.c to pcie-rockchip-host.c,
and only leave some common functions in pcie-rockchip.c in order to be
reused for both of RC driver and EP driver.

Signed-off-by: Shawn Lin <shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>

Tested-by: Jeffy Chen <jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
---

Changes in v7:
- check and update commit log

Changes in v6:
- rebase

Changes in v5:
- export symbol to fix error reported by Kbuild robot
- PCIE_ROCKCHIP depends on PCI

Changes in v4:
- remove empty line
- keep rockchip's order next to cadence and dwc, but
  we will try to resort it later when reconstructing
  the directories

 MAINTAINERS                           |    4 +-
 drivers/pci/host/Kconfig              |    7 +-
 drivers/pci/host/Makefile             |    1 +
 drivers/pci/host/pcie-rockchip-host.c | 1368 +++++++++++++++++++++++++++
 drivers/pci/host/pcie-rockchip.c      | 1625 +--------------------------------
 drivers/pci/host/pcie-rockchip.h      |  245 +++++
 6 files changed, 1653 insertions(+), 1597 deletions(-)
 create mode 100644 drivers/pci/host/pcie-rockchip-host.c
 create mode 100644 drivers/pci/host/pcie-rockchip.h

diff --git a/MAINTAINERS b/MAINTAINERS
index f8fa0c34..ed9cbaa 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10860,8 +10860,8 @@ M:	Shawn Lin <shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
 L:	linux-pci-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
 L:	linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
 S:	Maintained
-F:	Documentation/devicetree/bindings/pci/rockchip-pcie.txt
-F:	drivers/pci/host/pcie-rockchip.c
+F:	Documentation/devicetree/bindings/pci/rockchip-pcie*
+F:	drivers/pci/host/pcie-rockchip*
 
 PCI DRIVER FOR V3 SEMICONDUCTOR V360EPC
 M:	Linus Walleij <linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig
index dc8a2a1..45f31b3 100644
--- a/drivers/pci/host/Kconfig
+++ b/drivers/pci/host/Kconfig
@@ -178,11 +178,16 @@ config PCI_HOST_THUNDER_ECAM
 	  Say Y here if you want ECAM support for CN88XX-Pass-1.x Cavium Thunder SoCs.
 
 config PCIE_ROCKCHIP
-	tristate "Rockchip PCIe controller"
+	bool
+	depends on PCI
+
+config PCIE_ROCKCHIP_HOST
+	tristate "Rockchip PCIe host controller"
 	depends on ARCH_ROCKCHIP || COMPILE_TEST
 	depends on OF
 	depends on PCI_MSI_IRQ_DOMAIN
 	select MFD_SYSCON
+	select PCIE_ROCKCHIP
 	help
 	  Say Y here if you want internal PCI support on Rockchip SoC.
 	  There is 1 internal PCIe port available to support GEN2 with
diff --git a/drivers/pci/host/Makefile b/drivers/pci/host/Makefile
index 3b10591..f7d4522 100644
--- a/drivers/pci/host/Makefile
+++ b/drivers/pci/host/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_PCIE_IPROC_BCMA) += pcie-iproc-bcma.o
 obj-$(CONFIG_PCIE_ALTERA) += pcie-altera.o
 obj-$(CONFIG_PCIE_ALTERA_MSI) += pcie-altera-msi.o
 obj-$(CONFIG_PCIE_ROCKCHIP) += pcie-rockchip.o
+obj-$(CONFIG_PCIE_ROCKCHIP_HOST) += pcie-rockchip-host.o
 obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o
 obj-$(CONFIG_PCIE_TANGO_SMP8759) += pcie-tango.o
 obj-$(CONFIG_VMD) += vmd.o
diff --git a/drivers/pci/host/pcie-rockchip-host.c b/drivers/pci/host/pcie-rockchip-host.c
new file mode 100644
index 0000000..fae9ecc
--- /dev/null
+++ b/drivers/pci/host/pcie-rockchip-host.c
@@ -0,0 +1,1368 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Rockchip AXI PCIe host controller driver
+ *
+ * Copyright (c) 2016 Rockchip, Inc.
+ *
+ * Author: Shawn Lin <shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
+ *         Wenrui Li <wenrui.li-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
+ *
+ * Bits taken from Synopsys DesignWare Host controller driver and
+ * ARM PCI Host generic driver.
+ */
+
+#include <linux/bitrev.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/iopoll.h>
+#include <linux/irq.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/irqdomain.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_pci.h>
+#include <linux/of_platform.h>
+#include <linux/of_irq.h>
+#include <linux/pci.h>
+#include <linux/pci_ids.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+#include <linux/regmap.h>
+
+#include "pcie-rockchip.h"
+
+static void rockchip_pcie_enable_bw_int(struct rockchip_pcie *rockchip)
+{
+	u32 status;
+
+	status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
+	status |= (PCI_EXP_LNKCTL_LBMIE | PCI_EXP_LNKCTL_LABIE);
+	rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
+}
+
+static void rockchip_pcie_clr_bw_int(struct rockchip_pcie *rockchip)
+{
+	u32 status;
+
+	status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
+	status |= (PCI_EXP_LNKSTA_LBMS | PCI_EXP_LNKSTA_LABS) << 16;
+	rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
+}
+
+static void rockchip_pcie_update_txcredit_mui(struct rockchip_pcie *rockchip)
+{
+	u32 val;
+
+	/* Update Tx credit maximum update interval */
+	val = rockchip_pcie_read(rockchip, PCIE_CORE_TXCREDIT_CFG1);
+	val &= ~PCIE_CORE_TXCREDIT_CFG1_MUI_MASK;
+	val |= PCIE_CORE_TXCREDIT_CFG1_MUI_ENCODE(24000);	/* ns */
+	rockchip_pcie_write(rockchip, val, PCIE_CORE_TXCREDIT_CFG1);
+}
+
+static int rockchip_pcie_valid_device(struct rockchip_pcie *rockchip,
+				      struct pci_bus *bus, int dev)
+{
+	/* access only one slot on each root port */
+	if (bus->number == rockchip->root_bus_nr && dev > 0)
+		return 0;
+
+	/*
+	 * do not read more than one device on the bus directly attached
+	 * to RC's downstream side.
+	 */
+	if (bus->primary == rockchip->root_bus_nr && dev > 0)
+		return 0;
+
+	return 1;
+}
+
+static u8 rockchip_pcie_lane_map(struct rockchip_pcie *rockchip)
+{
+	u32 val;
+	u8 map;
+
+	if (rockchip->legacy_phy)
+		return GENMASK(MAX_LANE_NUM - 1, 0);
+
+	val = rockchip_pcie_read(rockchip, PCIE_CORE_LANE_MAP);
+	map = val & PCIE_CORE_LANE_MAP_MASK;
+
+	/* The link may be using a reverse-indexed mapping. */
+	if (val & PCIE_CORE_LANE_MAP_REVERSE)
+		map = bitrev8(map) >> 4;
+
+	return map;
+}
+
+static int rockchip_pcie_rd_own_conf(struct rockchip_pcie *rockchip,
+				     int where, int size, u32 *val)
+{
+	void __iomem *addr;
+
+	addr = rockchip->apb_base + PCIE_RC_CONFIG_NORMAL_BASE + where;
+
+	if (!IS_ALIGNED((uintptr_t)addr, size)) {
+		*val = 0;
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+	}
+
+	if (size == 4) {
+		*val = readl(addr);
+	} else if (size == 2) {
+		*val = readw(addr);
+	} else if (size == 1) {
+		*val = readb(addr);
+	} else {
+		*val = 0;
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+	}
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int rockchip_pcie_wr_own_conf(struct rockchip_pcie *rockchip,
+				     int where, int size, u32 val)
+{
+	u32 mask, tmp, offset;
+	void __iomem *addr;
+
+	offset = where & ~0x3;
+	addr = rockchip->apb_base + PCIE_RC_CONFIG_NORMAL_BASE + offset;
+
+	if (size == 4) {
+		writel(val, addr);
+		return PCIBIOS_SUCCESSFUL;
+	}
+
+	mask = ~(((1 << (size * 8)) - 1) << ((where & 0x3) * 8));
+
+	/*
+	 * N.B. This read/modify/write isn't safe in general because it can
+	 * corrupt RW1C bits in adjacent registers.  But the hardware
+	 * doesn't support smaller writes.
+	 */
+	tmp = readl(addr) & mask;
+	tmp |= val << ((where & 0x3) * 8);
+	writel(tmp, addr);
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int rockchip_pcie_rd_other_conf(struct rockchip_pcie *rockchip,
+				       struct pci_bus *bus, u32 devfn,
+				       int where, int size, u32 *val)
+{
+	u32 busdev;
+
+	busdev = PCIE_ECAM_ADDR(bus->number, PCI_SLOT(devfn),
+				PCI_FUNC(devfn), where);
+
+	if (!IS_ALIGNED(busdev, size)) {
+		*val = 0;
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+	}
+
+	if (bus->parent->number == rockchip->root_bus_nr)
+		rockchip_pcie_cfg_configuration_accesses(rockchip,
+						AXI_WRAPPER_TYPE0_CFG);
+	else
+		rockchip_pcie_cfg_configuration_accesses(rockchip,
+						AXI_WRAPPER_TYPE1_CFG);
+
+	if (size == 4) {
+		*val = readl(rockchip->reg_base + busdev);
+	} else if (size == 2) {
+		*val = readw(rockchip->reg_base + busdev);
+	} else if (size == 1) {
+		*val = readb(rockchip->reg_base + busdev);
+	} else {
+		*val = 0;
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+	}
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int rockchip_pcie_wr_other_conf(struct rockchip_pcie *rockchip,
+				       struct pci_bus *bus, u32 devfn,
+				       int where, int size, u32 val)
+{
+	u32 busdev;
+
+	busdev = PCIE_ECAM_ADDR(bus->number, PCI_SLOT(devfn),
+				PCI_FUNC(devfn), where);
+	if (!IS_ALIGNED(busdev, size))
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+
+	if (bus->parent->number == rockchip->root_bus_nr)
+		rockchip_pcie_cfg_configuration_accesses(rockchip,
+						AXI_WRAPPER_TYPE0_CFG);
+	else
+		rockchip_pcie_cfg_configuration_accesses(rockchip,
+						AXI_WRAPPER_TYPE1_CFG);
+
+	if (size == 4)
+		writel(val, rockchip->reg_base + busdev);
+	else if (size == 2)
+		writew(val, rockchip->reg_base + busdev);
+	else if (size == 1)
+		writeb(val, rockchip->reg_base + busdev);
+	else
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int rockchip_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
+				 int size, u32 *val)
+{
+	struct rockchip_pcie *rockchip = bus->sysdata;
+
+	if (!rockchip_pcie_valid_device(rockchip, bus, PCI_SLOT(devfn))) {
+		*val = 0xffffffff;
+		return PCIBIOS_DEVICE_NOT_FOUND;
+	}
+
+	if (bus->number == rockchip->root_bus_nr)
+		return rockchip_pcie_rd_own_conf(rockchip, where, size, val);
+
+	return rockchip_pcie_rd_other_conf(rockchip, bus, devfn, where, size,
+					   val);
+}
+
+static int rockchip_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
+				 int where, int size, u32 val)
+{
+	struct rockchip_pcie *rockchip = bus->sysdata;
+
+	if (!rockchip_pcie_valid_device(rockchip, bus, PCI_SLOT(devfn)))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	if (bus->number == rockchip->root_bus_nr)
+		return rockchip_pcie_wr_own_conf(rockchip, where, size, val);
+
+	return rockchip_pcie_wr_other_conf(rockchip, bus, devfn, where, size,
+					   val);
+}
+
+static struct pci_ops rockchip_pcie_ops = {
+	.read = rockchip_pcie_rd_conf,
+	.write = rockchip_pcie_wr_conf,
+};
+
+static void rockchip_pcie_set_power_limit(struct rockchip_pcie *rockchip)
+{
+	int curr;
+	u32 status, scale, power;
+
+	if (IS_ERR(rockchip->vpcie3v3))
+		return;
+
+	/*
+	 * Set RC's captured slot power limit and scale if
+	 * vpcie3v3 available. The default values are both zero
+	 * which means the software should set these two according
+	 * to the actual power supply.
+	 */
+	curr = regulator_get_current_limit(rockchip->vpcie3v3);
+	if (curr <= 0)
+		return;
+
+	scale = 3; /* 0.001x */
+	curr = curr / 1000; /* convert to mA */
+	power = (curr * 3300) / 1000; /* milliwatt */
+	while (power > PCIE_RC_CONFIG_DCR_CSPL_LIMIT) {
+		if (!scale) {
+			dev_warn(rockchip->dev, "invalid power supply\n");
+			return;
+		}
+		scale--;
+		power = power / 10;
+	}
+
+	status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_DCR);
+	status |= (power << PCIE_RC_CONFIG_DCR_CSPL_SHIFT) |
+		  (scale << PCIE_RC_CONFIG_DCR_CPLS_SHIFT);
+	rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_DCR);
+}
+
+/**
+ * rockchip_pcie_init_port - Initialize hardware
+ * @rockchip: PCIe port information
+ */
+static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
+{
+	struct device *dev = rockchip->dev;
+	int err, i;
+	u32 status;
+
+	gpiod_set_value_cansleep(rockchip->ep_gpio, 0);
+
+	err = reset_control_assert(rockchip->aclk_rst);
+	if (err) {
+		dev_err(dev, "assert aclk_rst err %d\n", err);
+		return err;
+	}
+
+	err = reset_control_assert(rockchip->pclk_rst);
+	if (err) {
+		dev_err(dev, "assert pclk_rst err %d\n", err);
+		return err;
+	}
+
+	err = reset_control_assert(rockchip->pm_rst);
+	if (err) {
+		dev_err(dev, "assert pm_rst err %d\n", err);
+		return err;
+	}
+
+	for (i = 0; i < MAX_LANE_NUM; i++) {
+		err = phy_init(rockchip->phys[i]);
+		if (err) {
+			dev_err(dev, "init phy%d err %d\n", i, err);
+			goto err_exit_phy;
+		}
+	}
+
+	err = reset_control_assert(rockchip->core_rst);
+	if (err) {
+		dev_err(dev, "assert core_rst err %d\n", err);
+		goto err_exit_phy;
+	}
+
+	err = reset_control_assert(rockchip->mgmt_rst);
+	if (err) {
+		dev_err(dev, "assert mgmt_rst err %d\n", err);
+		goto err_exit_phy;
+	}
+
+	err = reset_control_assert(rockchip->mgmt_sticky_rst);
+	if (err) {
+		dev_err(dev, "assert mgmt_sticky_rst err %d\n", err);
+		goto err_exit_phy;
+	}
+
+	err = reset_control_assert(rockchip->pipe_rst);
+	if (err) {
+		dev_err(dev, "assert pipe_rst err %d\n", err);
+		goto err_exit_phy;
+	}
+
+	udelay(10);
+
+	err = reset_control_deassert(rockchip->pm_rst);
+	if (err) {
+		dev_err(dev, "deassert pm_rst err %d\n", err);
+		goto err_exit_phy;
+	}
+
+	err = reset_control_deassert(rockchip->aclk_rst);
+	if (err) {
+		dev_err(dev, "deassert aclk_rst err %d\n", err);
+		goto err_exit_phy;
+	}
+
+	err = reset_control_deassert(rockchip->pclk_rst);
+	if (err) {
+		dev_err(dev, "deassert pclk_rst err %d\n", err);
+		goto err_exit_phy;
+	}
+
+	if (rockchip->link_gen == 2)
+		rockchip_pcie_write(rockchip, PCIE_CLIENT_GEN_SEL_2,
+				    PCIE_CLIENT_CONFIG);
+	else
+		rockchip_pcie_write(rockchip, PCIE_CLIENT_GEN_SEL_1,
+				    PCIE_CLIENT_CONFIG);
+
+	rockchip_pcie_write(rockchip,
+			    PCIE_CLIENT_CONF_ENABLE |
+			    PCIE_CLIENT_LINK_TRAIN_ENABLE |
+			    PCIE_CLIENT_ARI_ENABLE |
+			    PCIE_CLIENT_CONF_LANE_NUM(rockchip->lanes) |
+			    PCIE_CLIENT_MODE_RC,
+			    PCIE_CLIENT_CONFIG);
+
+	for (i = 0; i < MAX_LANE_NUM; i++) {
+		err = phy_power_on(rockchip->phys[i]);
+		if (err) {
+			dev_err(dev, "power on phy%d err %d\n", i, err);
+			goto err_power_off_phy;
+		}
+	}
+
+	/*
+	 * Please don't reorder the deassert sequence of the following
+	 * four reset pins.
+	 */
+	err = reset_control_deassert(rockchip->mgmt_sticky_rst);
+	if (err) {
+		dev_err(dev, "deassert mgmt_sticky_rst err %d\n", err);
+		goto err_power_off_phy;
+	}
+
+	err = reset_control_deassert(rockchip->core_rst);
+	if (err) {
+		dev_err(dev, "deassert core_rst err %d\n", err);
+		goto err_power_off_phy;
+	}
+
+	err = reset_control_deassert(rockchip->mgmt_rst);
+	if (err) {
+		dev_err(dev, "deassert mgmt_rst err %d\n", err);
+		goto err_power_off_phy;
+	}
+
+	err = reset_control_deassert(rockchip->pipe_rst);
+	if (err) {
+		dev_err(dev, "deassert pipe_rst err %d\n", err);
+		goto err_power_off_phy;
+	}
+
+	/* Fix the transmitted FTS count desired to exit from L0s. */
+	status = rockchip_pcie_read(rockchip, PCIE_CORE_CTRL_PLC1);
+	status = (status & ~PCIE_CORE_CTRL_PLC1_FTS_MASK) |
+		 (PCIE_CORE_CTRL_PLC1_FTS_CNT << PCIE_CORE_CTRL_PLC1_FTS_SHIFT);
+	rockchip_pcie_write(rockchip, status, PCIE_CORE_CTRL_PLC1);
+
+	rockchip_pcie_set_power_limit(rockchip);
+
+	/* Set RC's clock architecture as common clock */
+	status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
+	status |= PCI_EXP_LNKSTA_SLC << 16;
+	rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
+
+	/* Set RC's RCB to 128 */
+	status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
+	status |= PCI_EXP_LNKCTL_RCB;
+	rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
+
+	/* Enable Gen1 training */
+	rockchip_pcie_write(rockchip, PCIE_CLIENT_LINK_TRAIN_ENABLE,
+			    PCIE_CLIENT_CONFIG);
+
+	gpiod_set_value_cansleep(rockchip->ep_gpio, 1);
+
+	/* 500ms timeout value should be enough for Gen1/2 training */
+	err = readl_poll_timeout(rockchip->apb_base + PCIE_CLIENT_BASIC_STATUS1,
+				 status, PCIE_LINK_UP(status), 20,
+				 500 * USEC_PER_MSEC);
+	if (err) {
+		dev_err(dev, "PCIe link training gen1 timeout!\n");
+		goto err_power_off_phy;
+	}
+
+	if (rockchip->link_gen == 2) {
+		/*
+		 * Enable retrain for gen2. This should be configured only after
+		 * gen1 finished.
+		 */
+		status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
+		status |= PCI_EXP_LNKCTL_RL;
+		rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
+
+		err = readl_poll_timeout(rockchip->apb_base + PCIE_CORE_CTRL,
+					 status, PCIE_LINK_IS_GEN2(status), 20,
+					 500 * USEC_PER_MSEC);
+		if (err)
+			dev_dbg(dev, "PCIe link training gen2 timeout, fall back to gen1!\n");
+	}
+
+	/* Check the final link width from negotiated lane counter from MGMT */
+	status = rockchip_pcie_read(rockchip, PCIE_CORE_CTRL);
+	status = 0x1 << ((status & PCIE_CORE_PL_CONF_LANE_MASK) >>
+			  PCIE_CORE_PL_CONF_LANE_SHIFT);
+	dev_dbg(dev, "current link width is x%d\n", status);
+
+	/* Power off unused lane(s) */
+	rockchip->lanes_map = rockchip_pcie_lane_map(rockchip);
+	for (i = 0; i < MAX_LANE_NUM; i++) {
+		if (!(rockchip->lanes_map & BIT(i))) {
+			dev_dbg(dev, "idling lane %d\n", i);
+			phy_power_off(rockchip->phys[i]);
+		}
+	}
+
+	rockchip_pcie_write(rockchip, ROCKCHIP_VENDOR_ID,
+			    PCIE_CORE_CONFIG_VENDOR);
+	rockchip_pcie_write(rockchip,
+			    PCI_CLASS_BRIDGE_PCI << PCIE_RC_CONFIG_SCC_SHIFT,
+			    PCIE_RC_CONFIG_RID_CCR);
+
+	/* Clear THP cap's next cap pointer to remove L1 substate cap */
+	status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_THP_CAP);
+	status &= ~PCIE_RC_CONFIG_THP_CAP_NEXT_MASK;
+	rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_THP_CAP);
+
+	/* Clear L0s from RC's link cap */
+	if (of_property_read_bool(dev->of_node, "aspm-no-l0s")) {
+		status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LINK_CAP);
+		status &= ~PCIE_RC_CONFIG_LINK_CAP_L0S;
+		rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LINK_CAP);
+	}
+
+	status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_DCSR);
+	status &= ~PCIE_RC_CONFIG_DCSR_MPS_MASK;
+	status |= PCIE_RC_CONFIG_DCSR_MPS_256;
+	rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_DCSR);
+
+	return 0;
+err_power_off_phy:
+	while (i--)
+		phy_power_off(rockchip->phys[i]);
+	i = MAX_LANE_NUM;
+err_exit_phy:
+	while (i--)
+		phy_exit(rockchip->phys[i]);
+	return err;
+}
+
+static irqreturn_t rockchip_pcie_subsys_irq_handler(int irq, void *arg)
+{
+	struct rockchip_pcie *rockchip = arg;
+	struct device *dev = rockchip->dev;
+	u32 reg;
+	u32 sub_reg;
+
+	reg = rockchip_pcie_read(rockchip, PCIE_CLIENT_INT_STATUS);
+	if (reg & PCIE_CLIENT_INT_LOCAL) {
+		dev_dbg(dev, "local interrupt received\n");
+		sub_reg = rockchip_pcie_read(rockchip, PCIE_CORE_INT_STATUS);
+		if (sub_reg & PCIE_CORE_INT_PRFPE)
+			dev_dbg(dev, "parity error detected while reading from the PNP receive FIFO RAM\n");
+
+		if (sub_reg & PCIE_CORE_INT_CRFPE)
+			dev_dbg(dev, "parity error detected while reading from the Completion Receive FIFO RAM\n");
+
+		if (sub_reg & PCIE_CORE_INT_RRPE)
+			dev_dbg(dev, "parity error detected while reading from replay buffer RAM\n");
+
+		if (sub_reg & PCIE_CORE_INT_PRFO)
+			dev_dbg(dev, "overflow occurred in the PNP receive FIFO\n");
+
+		if (sub_reg & PCIE_CORE_INT_CRFO)
+			dev_dbg(dev, "overflow occurred in the completion receive FIFO\n");
+
+		if (sub_reg & PCIE_CORE_INT_RT)
+			dev_dbg(dev, "replay timer timed out\n");
+
+		if (sub_reg & PCIE_CORE_INT_RTR)
+			dev_dbg(dev, "replay timer rolled over after 4 transmissions of the same TLP\n");
+
+		if (sub_reg & PCIE_CORE_INT_PE)
+			dev_dbg(dev, "phy error detected on receive side\n");
+
+		if (sub_reg & PCIE_CORE_INT_MTR)
+			dev_dbg(dev, "malformed TLP received from the link\n");
+
+		if (sub_reg & PCIE_CORE_INT_UCR)
+			dev_dbg(dev, "malformed TLP received from the link\n");
+
+		if (sub_reg & PCIE_CORE_INT_FCE)
+			dev_dbg(dev, "an error was observed in the flow control advertisements from the other side\n");
+
+		if (sub_reg & PCIE_CORE_INT_CT)
+			dev_dbg(dev, "a request timed out waiting for completion\n");
+
+		if (sub_reg & PCIE_CORE_INT_UTC)
+			dev_dbg(dev, "unmapped TC error\n");
+
+		if (sub_reg & PCIE_CORE_INT_MMVC)
+			dev_dbg(dev, "MSI mask register changes\n");
+
+		rockchip_pcie_write(rockchip, sub_reg, PCIE_CORE_INT_STATUS);
+	} else if (reg & PCIE_CLIENT_INT_PHY) {
+		dev_dbg(dev, "phy link changes\n");
+		rockchip_pcie_update_txcredit_mui(rockchip);
+		rockchip_pcie_clr_bw_int(rockchip);
+	}
+
+	rockchip_pcie_write(rockchip, reg & PCIE_CLIENT_INT_LOCAL,
+			    PCIE_CLIENT_INT_STATUS);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t rockchip_pcie_client_irq_handler(int irq, void *arg)
+{
+	struct rockchip_pcie *rockchip = arg;
+	struct device *dev = rockchip->dev;
+	u32 reg;
+
+	reg = rockchip_pcie_read(rockchip, PCIE_CLIENT_INT_STATUS);
+	if (reg & PCIE_CLIENT_INT_LEGACY_DONE)
+		dev_dbg(dev, "legacy done interrupt received\n");
+
+	if (reg & PCIE_CLIENT_INT_MSG)
+		dev_dbg(dev, "message done interrupt received\n");
+
+	if (reg & PCIE_CLIENT_INT_HOT_RST)
+		dev_dbg(dev, "hot reset interrupt received\n");
+
+	if (reg & PCIE_CLIENT_INT_DPA)
+		dev_dbg(dev, "dpa interrupt received\n");
+
+	if (reg & PCIE_CLIENT_INT_FATAL_ERR)
+		dev_dbg(dev, "fatal error interrupt received\n");
+
+	if (reg & PCIE_CLIENT_INT_NFATAL_ERR)
+		dev_dbg(dev, "no fatal error interrupt received\n");
+
+	if (reg & PCIE_CLIENT_INT_CORR_ERR)
+		dev_dbg(dev, "correctable error interrupt received\n");
+
+	if (reg & PCIE_CLIENT_INT_PHY)
+		dev_dbg(dev, "phy interrupt received\n");
+
+	rockchip_pcie_write(rockchip, reg & (PCIE_CLIENT_INT_LEGACY_DONE |
+			      PCIE_CLIENT_INT_MSG | PCIE_CLIENT_INT_HOT_RST |
+			      PCIE_CLIENT_INT_DPA | PCIE_CLIENT_INT_FATAL_ERR |
+			      PCIE_CLIENT_INT_NFATAL_ERR |
+			      PCIE_CLIENT_INT_CORR_ERR |
+			      PCIE_CLIENT_INT_PHY),
+		   PCIE_CLIENT_INT_STATUS);
+
+	return IRQ_HANDLED;
+}
+
+static void rockchip_pcie_legacy_int_handler(struct irq_desc *desc)
+{
+	struct irq_chip *chip = irq_desc_get_chip(desc);
+	struct rockchip_pcie *rockchip = irq_desc_get_handler_data(desc);
+	struct device *dev = rockchip->dev;
+	u32 reg;
+	u32 hwirq;
+	u32 virq;
+
+	chained_irq_enter(chip, desc);
+
+	reg = rockchip_pcie_read(rockchip, PCIE_CLIENT_INT_STATUS);
+	reg = (reg & PCIE_CLIENT_INTR_MASK) >> PCIE_CLIENT_INTR_SHIFT;
+
+	while (reg) {
+		hwirq = ffs(reg) - 1;
+		reg &= ~BIT(hwirq);
+
+		virq = irq_find_mapping(rockchip->irq_domain, hwirq);
+		if (virq)
+			generic_handle_irq(virq);
+		else
+			dev_err(dev, "unexpected IRQ, INT%d\n", hwirq);
+	}
+
+	chained_irq_exit(chip, desc);
+}
+
+static int rockchip_pcie_setup_irq(struct rockchip_pcie *rockchip)
+{
+	int irq, err;
+	struct device *dev = rockchip->dev;
+	struct platform_device *pdev = to_platform_device(dev);
+
+	irq = platform_get_irq_byname(pdev, "sys");
+	if (irq < 0) {
+		dev_err(dev, "missing sys IRQ resource\n");
+		return irq;
+	}
+
+	err = devm_request_irq(dev, irq, rockchip_pcie_subsys_irq_handler,
+			       IRQF_SHARED, "pcie-sys", rockchip);
+	if (err) {
+		dev_err(dev, "failed to request PCIe subsystem IRQ\n");
+		return err;
+	}
+
+	irq = platform_get_irq_byname(pdev, "legacy");
+	if (irq < 0) {
+		dev_err(dev, "missing legacy IRQ resource\n");
+		return irq;
+	}
+
+	irq_set_chained_handler_and_data(irq,
+					 rockchip_pcie_legacy_int_handler,
+					 rockchip);
+
+	irq = platform_get_irq_byname(pdev, "client");
+	if (irq < 0) {
+		dev_err(dev, "missing client IRQ resource\n");
+		return irq;
+	}
+
+	err = devm_request_irq(dev, irq, rockchip_pcie_client_irq_handler,
+			       IRQF_SHARED, "pcie-client", rockchip);
+	if (err) {
+		dev_err(dev, "failed to request PCIe client IRQ\n");
+		return err;
+	}
+
+	return 0;
+}
+
+/**
+ * rockchip_pcie_parse_dt - Parse Device Tree
+ * @rockchip: PCIe port information
+ *
+ * Return: '0' on success and error value on failure
+ */
+static int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
+{
+	struct device *dev = rockchip->dev;
+	struct platform_device *pdev = to_platform_device(dev);
+	struct device_node *node = dev->of_node;
+	struct resource *regs;
+	int err;
+
+	regs = platform_get_resource_byname(pdev,
+					    IORESOURCE_MEM,
+					    "axi-base");
+	rockchip->reg_base = devm_pci_remap_cfg_resource(dev, regs);
+	if (IS_ERR(rockchip->reg_base))
+		return PTR_ERR(rockchip->reg_base);
+
+	regs = platform_get_resource_byname(pdev,
+					    IORESOURCE_MEM,
+					    "apb-base");
+	rockchip->apb_base = devm_ioremap_resource(dev, regs);
+	if (IS_ERR(rockchip->apb_base))
+		return PTR_ERR(rockchip->apb_base);
+
+	err = rockchip_pcie_get_phys(rockchip);
+	if (err)
+		return err;
+
+	rockchip->lanes = 1;
+	err = of_property_read_u32(node, "num-lanes", &rockchip->lanes);
+	if (!err && (rockchip->lanes == 0 ||
+		     rockchip->lanes == 3 ||
+		     rockchip->lanes > 4)) {
+		dev_warn(dev, "invalid num-lanes, default to use one lane\n");
+		rockchip->lanes = 1;
+	}
+
+	rockchip->link_gen = of_pci_get_max_link_speed(node);
+	if (rockchip->link_gen < 0 || rockchip->link_gen > 2)
+		rockchip->link_gen = 2;
+
+	rockchip->core_rst = devm_reset_control_get_exclusive(dev, "core");
+	if (IS_ERR(rockchip->core_rst)) {
+		if (PTR_ERR(rockchip->core_rst) != -EPROBE_DEFER)
+			dev_err(dev, "missing core reset property in node\n");
+		return PTR_ERR(rockchip->core_rst);
+	}
+
+	rockchip->mgmt_rst = devm_reset_control_get_exclusive(dev, "mgmt");
+	if (IS_ERR(rockchip->mgmt_rst)) {
+		if (PTR_ERR(rockchip->mgmt_rst) != -EPROBE_DEFER)
+			dev_err(dev, "missing mgmt reset property in node\n");
+		return PTR_ERR(rockchip->mgmt_rst);
+	}
+
+	rockchip->mgmt_sticky_rst = devm_reset_control_get_exclusive(dev,
+								     "mgmt-sticky");
+	if (IS_ERR(rockchip->mgmt_sticky_rst)) {
+		if (PTR_ERR(rockchip->mgmt_sticky_rst) != -EPROBE_DEFER)
+			dev_err(dev, "missing mgmt-sticky reset property in node\n");
+		return PTR_ERR(rockchip->mgmt_sticky_rst);
+	}
+
+	rockchip->pipe_rst = devm_reset_control_get_exclusive(dev, "pipe");
+	if (IS_ERR(rockchip->pipe_rst)) {
+		if (PTR_ERR(rockchip->pipe_rst) != -EPROBE_DEFER)
+			dev_err(dev, "missing pipe reset property in node\n");
+		return PTR_ERR(rockchip->pipe_rst);
+	}
+
+	rockchip->pm_rst = devm_reset_control_get_exclusive(dev, "pm");
+	if (IS_ERR(rockchip->pm_rst)) {
+		if (PTR_ERR(rockchip->pm_rst) != -EPROBE_DEFER)
+			dev_err(dev, "missing pm reset property in node\n");
+		return PTR_ERR(rockchip->pm_rst);
+	}
+
+	rockchip->pclk_rst = devm_reset_control_get_exclusive(dev, "pclk");
+	if (IS_ERR(rockchip->pclk_rst)) {
+		if (PTR_ERR(rockchip->pclk_rst) != -EPROBE_DEFER)
+			dev_err(dev, "missing pclk reset property in node\n");
+		return PTR_ERR(rockchip->pclk_rst);
+	}
+
+	rockchip->aclk_rst = devm_reset_control_get_exclusive(dev, "aclk");
+	if (IS_ERR(rockchip->aclk_rst)) {
+		if (PTR_ERR(rockchip->aclk_rst) != -EPROBE_DEFER)
+			dev_err(dev, "missing aclk reset property in node\n");
+		return PTR_ERR(rockchip->aclk_rst);
+	}
+
+	rockchip->ep_gpio = devm_gpiod_get(dev, "ep", GPIOD_OUT_HIGH);
+	if (IS_ERR(rockchip->ep_gpio)) {
+		dev_err(dev, "missing ep-gpios property in node\n");
+		return PTR_ERR(rockchip->ep_gpio);
+	}
+
+	rockchip->aclk_pcie = devm_clk_get(dev, "aclk");
+	if (IS_ERR(rockchip->aclk_pcie)) {
+		dev_err(dev, "aclk clock not found\n");
+		return PTR_ERR(rockchip->aclk_pcie);
+	}
+
+	rockchip->aclk_perf_pcie = devm_clk_get(dev, "aclk-perf");
+	if (IS_ERR(rockchip->aclk_perf_pcie)) {
+		dev_err(dev, "aclk_perf clock not found\n");
+		return PTR_ERR(rockchip->aclk_perf_pcie);
+	}
+
+	rockchip->hclk_pcie = devm_clk_get(dev, "hclk");
+	if (IS_ERR(rockchip->hclk_pcie)) {
+		dev_err(dev, "hclk clock not found\n");
+		return PTR_ERR(rockchip->hclk_pcie);
+	}
+
+	rockchip->clk_pcie_pm = devm_clk_get(dev, "pm");
+	if (IS_ERR(rockchip->clk_pcie_pm)) {
+		dev_err(dev, "pm clock not found\n");
+		return PTR_ERR(rockchip->clk_pcie_pm);
+	}
+
+	err = rockchip_pcie_setup_irq(rockchip);
+	if (err)
+		return err;
+
+	rockchip->vpcie12v = devm_regulator_get_optional(dev, "vpcie12v");
+	if (IS_ERR(rockchip->vpcie12v)) {
+		if (PTR_ERR(rockchip->vpcie12v) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_info(dev, "no vpcie12v regulator found\n");
+	}
+
+	rockchip->vpcie3v3 = devm_regulator_get_optional(dev, "vpcie3v3");
+	if (IS_ERR(rockchip->vpcie3v3)) {
+		if (PTR_ERR(rockchip->vpcie3v3) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_info(dev, "no vpcie3v3 regulator found\n");
+	}
+
+	rockchip->vpcie1v8 = devm_regulator_get_optional(dev, "vpcie1v8");
+	if (IS_ERR(rockchip->vpcie1v8)) {
+		if (PTR_ERR(rockchip->vpcie1v8) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_info(dev, "no vpcie1v8 regulator found\n");
+	}
+
+	rockchip->vpcie0v9 = devm_regulator_get_optional(dev, "vpcie0v9");
+	if (IS_ERR(rockchip->vpcie0v9)) {
+		if (PTR_ERR(rockchip->vpcie0v9) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_info(dev, "no vpcie0v9 regulator found\n");
+	}
+
+	return 0;
+}
+
+static int rockchip_pcie_set_vpcie(struct rockchip_pcie *rockchip)
+{
+	struct device *dev = rockchip->dev;
+	int err;
+
+	if (!IS_ERR(rockchip->vpcie12v)) {
+		err = regulator_enable(rockchip->vpcie12v);
+		if (err) {
+			dev_err(dev, "fail to enable vpcie12v regulator\n");
+			goto err_out;
+		}
+	}
+
+	if (!IS_ERR(rockchip->vpcie3v3)) {
+		err = regulator_enable(rockchip->vpcie3v3);
+		if (err) {
+			dev_err(dev, "fail to enable vpcie3v3 regulator\n");
+			goto err_disable_12v;
+		}
+	}
+
+	if (!IS_ERR(rockchip->vpcie1v8)) {
+		err = regulator_enable(rockchip->vpcie1v8);
+		if (err) {
+			dev_err(dev, "fail to enable vpcie1v8 regulator\n");
+			goto err_disable_3v3;
+		}
+	}
+
+	if (!IS_ERR(rockchip->vpcie0v9)) {
+		err = regulator_enable(rockchip->vpcie0v9);
+		if (err) {
+			dev_err(dev, "fail to enable vpcie0v9 regulator\n");
+			goto err_disable_1v8;
+		}
+	}
+
+	return 0;
+
+err_disable_1v8:
+	if (!IS_ERR(rockchip->vpcie1v8))
+		regulator_disable(rockchip->vpcie1v8);
+err_disable_3v3:
+	if (!IS_ERR(rockchip->vpcie3v3))
+		regulator_disable(rockchip->vpcie3v3);
+err_disable_12v:
+	if (!IS_ERR(rockchip->vpcie12v))
+		regulator_disable(rockchip->vpcie12v);
+err_out:
+	return err;
+}
+
+static void rockchip_pcie_enable_interrupts(struct rockchip_pcie *rockchip)
+{
+	rockchip_pcie_write(rockchip, (PCIE_CLIENT_INT_CLI << 16) &
+			    (~PCIE_CLIENT_INT_CLI), PCIE_CLIENT_INT_MASK);
+	rockchip_pcie_write(rockchip, (u32)(~PCIE_CORE_INT),
+			    PCIE_CORE_INT_MASK);
+
+	rockchip_pcie_enable_bw_int(rockchip);
+}
+
+static int rockchip_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
+				  irq_hw_number_t hwirq)
+{
+	irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_simple_irq);
+	irq_set_chip_data(irq, domain->host_data);
+
+	return 0;
+}
+
+static const struct irq_domain_ops intx_domain_ops = {
+	.map = rockchip_pcie_intx_map,
+};
+
+static int rockchip_pcie_init_irq_domain(struct rockchip_pcie *rockchip)
+{
+	struct device *dev = rockchip->dev;
+	struct device_node *intc = of_get_next_child(dev->of_node, NULL);
+
+	if (!intc) {
+		dev_err(dev, "missing child interrupt-controller node\n");
+		return -EINVAL;
+	}
+
+	rockchip->irq_domain = irq_domain_add_linear(intc, PCI_NUM_INTX,
+						    &intx_domain_ops, rockchip);
+	if (!rockchip->irq_domain) {
+		dev_err(dev, "failed to get a INTx IRQ domain\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int rockchip_pcie_prog_ob_atu(struct rockchip_pcie *rockchip,
+				     int region_no, int type, u8 num_pass_bits,
+				     u32 lower_addr, u32 upper_addr)
+{
+	u32 ob_addr_0;
+	u32 ob_addr_1;
+	u32 ob_desc_0;
+	u32 aw_offset;
+
+	if (region_no >= MAX_AXI_WRAPPER_REGION_NUM)
+		return -EINVAL;
+	if (num_pass_bits + 1 < 8)
+		return -EINVAL;
+	if (num_pass_bits > 63)
+		return -EINVAL;
+	if (region_no == 0) {
+		if (AXI_REGION_0_SIZE < (2ULL << num_pass_bits))
+			return -EINVAL;
+	}
+	if (region_no != 0) {
+		if (AXI_REGION_SIZE < (2ULL << num_pass_bits))
+			return -EINVAL;
+	}
+
+	aw_offset = (region_no << OB_REG_SIZE_SHIFT);
+
+	ob_addr_0 = num_pass_bits & PCIE_CORE_OB_REGION_ADDR0_NUM_BITS;
+	ob_addr_0 |= lower_addr & PCIE_CORE_OB_REGION_ADDR0_LO_ADDR;
+	ob_addr_1 = upper_addr;
+	ob_desc_0 = (1 << 23 | type);
+
+	rockchip_pcie_write(rockchip, ob_addr_0,
+			    PCIE_CORE_OB_REGION_ADDR0 + aw_offset);
+	rockchip_pcie_write(rockchip, ob_addr_1,
+			    PCIE_CORE_OB_REGION_ADDR1 + aw_offset);
+	rockchip_pcie_write(rockchip, ob_desc_0,
+			    PCIE_CORE_OB_REGION_DESC0 + aw_offset);
+	rockchip_pcie_write(rockchip, 0,
+			    PCIE_CORE_OB_REGION_DESC1 + aw_offset);
+
+	return 0;
+}
+
+static int rockchip_pcie_prog_ib_atu(struct rockchip_pcie *rockchip,
+				     int region_no, u8 num_pass_bits,
+				     u32 lower_addr, u32 upper_addr)
+{
+	u32 ib_addr_0;
+	u32 ib_addr_1;
+	u32 aw_offset;
+
+	if (region_no > MAX_AXI_IB_ROOTPORT_REGION_NUM)
+		return -EINVAL;
+	if (num_pass_bits + 1 < MIN_AXI_ADDR_BITS_PASSED)
+		return -EINVAL;
+	if (num_pass_bits > 63)
+		return -EINVAL;
+
+	aw_offset = (region_no << IB_ROOT_PORT_REG_SIZE_SHIFT);
+
+	ib_addr_0 = num_pass_bits & PCIE_CORE_IB_REGION_ADDR0_NUM_BITS;
+	ib_addr_0 |= (lower_addr << 8) & PCIE_CORE_IB_REGION_ADDR0_LO_ADDR;
+	ib_addr_1 = upper_addr;
+
+	rockchip_pcie_write(rockchip, ib_addr_0, PCIE_RP_IB_ADDR0 + aw_offset);
+	rockchip_pcie_write(rockchip, ib_addr_1, PCIE_RP_IB_ADDR1 + aw_offset);
+
+	return 0;
+}
+
+static int rockchip_pcie_cfg_atu(struct rockchip_pcie *rockchip)
+{
+	struct device *dev = rockchip->dev;
+	int offset;
+	int err;
+	int reg_no;
+
+	rockchip_pcie_cfg_configuration_accesses(rockchip,
+						 AXI_WRAPPER_TYPE0_CFG);
+
+	for (reg_no = 0; reg_no < (rockchip->mem_size >> 20); reg_no++) {
+		err = rockchip_pcie_prog_ob_atu(rockchip, reg_no + 1,
+						AXI_WRAPPER_MEM_WRITE,
+						20 - 1,
+						rockchip->mem_bus_addr +
+						(reg_no << 20),
+						0);
+		if (err) {
+			dev_err(dev, "program RC mem outbound ATU failed\n");
+			return err;
+		}
+	}
+
+	err = rockchip_pcie_prog_ib_atu(rockchip, 2, 32 - 1, 0x0, 0);
+	if (err) {
+		dev_err(dev, "program RC mem inbound ATU failed\n");
+		return err;
+	}
+
+	offset = rockchip->mem_size >> 20;
+	for (reg_no = 0; reg_no < (rockchip->io_size >> 20); reg_no++) {
+		err = rockchip_pcie_prog_ob_atu(rockchip,
+						reg_no + 1 + offset,
+						AXI_WRAPPER_IO_WRITE,
+						20 - 1,
+						rockchip->io_bus_addr +
+						(reg_no << 20),
+						0);
+		if (err) {
+			dev_err(dev, "program RC io outbound ATU failed\n");
+			return err;
+		}
+	}
+
+	/* assign message regions */
+	rockchip_pcie_prog_ob_atu(rockchip, reg_no + 1 + offset,
+				  AXI_WRAPPER_NOR_MSG,
+				  20 - 1, 0, 0);
+
+	rockchip->msg_bus_addr = rockchip->mem_bus_addr +
+					((reg_no + offset) << 20);
+	return err;
+}
+
+static int rockchip_pcie_wait_l2(struct rockchip_pcie *rockchip)
+{
+	u32 value;
+	int err;
+
+	/* send PME_TURN_OFF message */
+	writel(0x0, rockchip->msg_region + PCIE_RC_SEND_PME_OFF);
+
+	/* read LTSSM and wait for falling into L2 link state */
+	err = readl_poll_timeout(rockchip->apb_base + PCIE_CLIENT_DEBUG_OUT_0,
+				 value, PCIE_LINK_IS_L2(value), 20,
+				 jiffies_to_usecs(5 * HZ));
+	if (err) {
+		dev_err(rockchip->dev, "PCIe link enter L2 timeout!\n");
+		return err;
+	}
+
+	return 0;
+}
+
+static int __maybe_unused rockchip_pcie_suspend_noirq(struct device *dev)
+{
+	struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
+	int ret;
+
+	/* disable core and cli int since we don't need to ack PME_ACK */
+	rockchip_pcie_write(rockchip, (PCIE_CLIENT_INT_CLI << 16) |
+			    PCIE_CLIENT_INT_CLI, PCIE_CLIENT_INT_MASK);
+	rockchip_pcie_write(rockchip, (u32)PCIE_CORE_INT, PCIE_CORE_INT_MASK);
+
+	ret = rockchip_pcie_wait_l2(rockchip);
+	if (ret) {
+		rockchip_pcie_enable_interrupts(rockchip);
+		return ret;
+	}
+
+	rockchip_pcie_deinit_phys(rockchip);
+
+	rockchip_pcie_disable_clocks(rockchip);
+
+	if (!IS_ERR(rockchip->vpcie0v9))
+		regulator_disable(rockchip->vpcie0v9);
+
+	return ret;
+}
+
+static int __maybe_unused rockchip_pcie_resume_noirq(struct device *dev)
+{
+	struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
+	int err;
+
+	if (!IS_ERR(rockchip->vpcie0v9)) {
+		err = regulator_enable(rockchip->vpcie0v9);
+		if (err) {
+			dev_err(dev, "fail to enable vpcie0v9 regulator\n");
+			return err;
+		}
+	}
+
+	err = rockchip_pcie_enable_clocks(rockchip);
+	if (err)
+		goto err_disable_0v9;
+
+	err = rockchip_pcie_init_port(rockchip);
+	if (err)
+		goto err_pcie_resume;
+
+	err = rockchip_pcie_cfg_atu(rockchip);
+	if (err)
+		goto err_err_deinit_port;
+
+	/* Need this to enter L1 again */
+	rockchip_pcie_update_txcredit_mui(rockchip);
+	rockchip_pcie_enable_interrupts(rockchip);
+
+	return 0;
+
+err_err_deinit_port:
+	rockchip_pcie_deinit_phys(rockchip);
+err_pcie_resume:
+	rockchip_pcie_disable_clocks(rockchip);
+err_disable_0v9:
+	if (!IS_ERR(rockchip->vpcie0v9))
+		regulator_disable(rockchip->vpcie0v9);
+	return err;
+}
+
+static int rockchip_pcie_probe(struct platform_device *pdev)
+{
+	struct rockchip_pcie *rockchip;
+	struct device *dev = &pdev->dev;
+	struct pci_bus *bus, *child;
+	struct pci_host_bridge *bridge;
+	struct resource_entry *win;
+	resource_size_t io_base;
+	struct resource	*mem;
+	struct resource	*io;
+	int err;
+
+	LIST_HEAD(res);
+
+	if (!dev->of_node)
+		return -ENODEV;
+
+	bridge = devm_pci_alloc_host_bridge(dev, sizeof(*rockchip));
+	if (!bridge)
+		return -ENOMEM;
+
+	rockchip = pci_host_bridge_priv(bridge);
+
+	platform_set_drvdata(pdev, rockchip);
+	rockchip->dev = dev;
+
+	err = rockchip_pcie_parse_dt(rockchip);
+	if (err)
+		return err;
+
+	err = rockchip_pcie_enable_clocks(rockchip);
+	if (err)
+		return err;
+
+	err = rockchip_pcie_set_vpcie(rockchip);
+	if (err) {
+		dev_err(dev, "failed to set vpcie regulator\n");
+		goto err_set_vpcie;
+	}
+
+	err = rockchip_pcie_init_port(rockchip);
+	if (err)
+		goto err_vpcie;
+
+	rockchip_pcie_enable_interrupts(rockchip);
+
+	err = rockchip_pcie_init_irq_domain(rockchip);
+	if (err < 0)
+		goto err_deinit_port;
+
+	err = of_pci_get_host_bridge_resources(dev->of_node, 0, 0xff,
+					       &res, &io_base);
+	if (err)
+		goto err_remove_irq_domain;
+
+	err = devm_request_pci_bus_resources(dev, &res);
+	if (err)
+		goto err_free_res;
+
+	/* Get the I/O and memory ranges from DT */
+	resource_list_for_each_entry(win, &res) {
+		switch (resource_type(win->res)) {
+		case IORESOURCE_IO:
+			io = win->res;
+			io->name = "I/O";
+			rockchip->io_size = resource_size(io);
+			rockchip->io_bus_addr = io->start - win->offset;
+			err = pci_remap_iospace(io, io_base);
+			if (err) {
+				dev_warn(dev, "error %d: failed to map resource %pR\n",
+					 err, io);
+				continue;
+			}
+			rockchip->io = io;
+			break;
+		case IORESOURCE_MEM:
+			mem = win->res;
+			mem->name = "MEM";
+			rockchip->mem_size = resource_size(mem);
+			rockchip->mem_bus_addr = mem->start - win->offset;
+			break;
+		case IORESOURCE_BUS:
+			rockchip->root_bus_nr = win->res->start;
+			break;
+		default:
+			continue;
+		}
+	}
+
+	err = rockchip_pcie_cfg_atu(rockchip);
+	if (err)
+		goto err_unmap_iospace;
+
+	rockchip->msg_region = devm_ioremap(dev, rockchip->msg_bus_addr, SZ_1M);
+	if (!rockchip->msg_region) {
+		err = -ENOMEM;
+		goto err_unmap_iospace;
+	}
+
+	list_splice_init(&res, &bridge->windows);
+	bridge->dev.parent = dev;
+	bridge->sysdata = rockchip;
+	bridge->busnr = 0;
+	bridge->ops = &rockchip_pcie_ops;
+	bridge->map_irq = of_irq_parse_and_map_pci;
+	bridge->swizzle_irq = pci_common_swizzle;
+
+	err = pci_scan_root_bus_bridge(bridge);
+	if (err < 0)
+		goto err_unmap_iospace;
+
+	bus = bridge->bus;
+
+	rockchip->root_bus = bus;
+
+	pci_bus_size_bridges(bus);
+	pci_bus_assign_resources(bus);
+	list_for_each_entry(child, &bus->children, node)
+		pcie_bus_configure_settings(child);
+
+	pci_bus_add_devices(bus);
+	return 0;
+
+err_unmap_iospace:
+	pci_unmap_iospace(rockchip->io);
+err_free_res:
+	pci_free_resource_list(&res);
+err_remove_irq_domain:
+	irq_domain_remove(rockchip->irq_domain);
+err_deinit_port:
+	rockchip_pcie_deinit_phys(rockchip);
+err_vpcie:
+	if (!IS_ERR(rockchip->vpcie12v))
+		regulator_disable(rockchip->vpcie12v);
+	if (!IS_ERR(rockchip->vpcie3v3))
+		regulator_disable(rockchip->vpcie3v3);
+	if (!IS_ERR(rockchip->vpcie1v8))
+		regulator_disable(rockchip->vpcie1v8);
+	if (!IS_ERR(rockchip->vpcie0v9))
+		regulator_disable(rockchip->vpcie0v9);
+err_set_vpcie:
+	rockchip_pcie_disable_clocks(rockchip);
+	return err;
+}
+
+static int rockchip_pcie_remove(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
+
+	pci_stop_root_bus(rockchip->root_bus);
+	pci_remove_root_bus(rockchip->root_bus);
+	pci_unmap_iospace(rockchip->io);
+	irq_domain_remove(rockchip->irq_domain);
+
+	rockchip_pcie_deinit_phys(rockchip);
+
+	rockchip_pcie_disable_clocks(rockchip);
+
+	if (!IS_ERR(rockchip->vpcie12v))
+		regulator_disable(rockchip->vpcie12v);
+	if (!IS_ERR(rockchip->vpcie3v3))
+		regulator_disable(rockchip->vpcie3v3);
+	if (!IS_ERR(rockchip->vpcie1v8))
+		regulator_disable(rockchip->vpcie1v8);
+	if (!IS_ERR(rockchip->vpcie0v9))
+		regulator_disable(rockchip->vpcie0v9);
+
+	return 0;
+}
+
+static const struct dev_pm_ops rockchip_pcie_pm_ops = {
+	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(rockchip_pcie_suspend_noirq,
+				      rockchip_pcie_resume_noirq)
+};
+
+static const struct of_device_id rockchip_pcie_of_match[] = {
+	{ .compatible = "rockchip,rk3399-pcie", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, rockchip_pcie_of_match);
+
+static struct platform_driver rockchip_pcie_driver = {
+	.driver = {
+		.name = "rockchip-pcie",
+		.of_match_table = rockchip_pcie_of_match,
+		.pm = &rockchip_pcie_pm_ops,
+	},
+	.probe = rockchip_pcie_probe,
+	.remove = rockchip_pcie_remove,
+};
+module_platform_driver(rockchip_pcie_driver);
+
+MODULE_AUTHOR("Rockchip Inc");
+MODULE_DESCRIPTION("Rockchip AXI PCIe driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c
index f1e8f97..3d46da9 100644
--- a/drivers/pci/host/pcie-rockchip.c
+++ b/drivers/pci/host/pcie-rockchip.c
@@ -11,904 +11,12 @@
  * ARM PCI Host generic driver.
  */
 
-#include <linux/bitrev.h>
 #include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/gpio/consumer.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/iopoll.h>
-#include <linux/irq.h>
-#include <linux/irqchip/chained_irq.h>
-#include <linux/irqdomain.h>
-#include <linux/kernel.h>
-#include <linux/mfd/syscon.h>
-#include <linux/module.h>
-#include <linux/of_address.h>
-#include <linux/of_device.h>
-#include <linux/of_pci.h>
-#include <linux/of_platform.h>
-#include <linux/of_irq.h>
-#include <linux/pci.h>
-#include <linux/pci_ids.h>
 #include <linux/phy/phy.h>
-#include <linux/platform_device.h>
-#include <linux/reset.h>
-#include <linux/regmap.h>
 
-/*
- * The upper 16 bits of PCIE_CLIENT_CONFIG are a write mask for the lower 16
- * bits.  This allows atomic updates of the register without locking.
- */
-#define HIWORD_UPDATE(mask, val)	(((mask) << 16) | (val))
-#define HIWORD_UPDATE_BIT(val)		HIWORD_UPDATE(val, val)
-
-#define ENCODE_LANES(x)			((((x) >> 1) & 3) << 4)
-#define MAX_LANE_NUM			4
-
-#define PCIE_CLIENT_BASE		0x0
-#define PCIE_CLIENT_CONFIG		(PCIE_CLIENT_BASE + 0x00)
-#define   PCIE_CLIENT_CONF_ENABLE	  HIWORD_UPDATE_BIT(0x0001)
-#define   PCIE_CLIENT_LINK_TRAIN_ENABLE	  HIWORD_UPDATE_BIT(0x0002)
-#define   PCIE_CLIENT_ARI_ENABLE	  HIWORD_UPDATE_BIT(0x0008)
-#define   PCIE_CLIENT_CONF_LANE_NUM(x)	  HIWORD_UPDATE(0x0030, ENCODE_LANES(x))
-#define   PCIE_CLIENT_MODE_RC		  HIWORD_UPDATE_BIT(0x0040)
-#define   PCIE_CLIENT_GEN_SEL_1		  HIWORD_UPDATE(0x0080, 0)
-#define   PCIE_CLIENT_GEN_SEL_2		  HIWORD_UPDATE_BIT(0x0080)
-#define PCIE_CLIENT_DEBUG_OUT_0		(PCIE_CLIENT_BASE + 0x3c)
-#define   PCIE_CLIENT_DEBUG_LTSSM_MASK		GENMASK(5, 0)
-#define   PCIE_CLIENT_DEBUG_LTSSM_L1		0x18
-#define   PCIE_CLIENT_DEBUG_LTSSM_L2		0x19
-#define PCIE_CLIENT_BASIC_STATUS1	(PCIE_CLIENT_BASE + 0x48)
-#define   PCIE_CLIENT_LINK_STATUS_UP		0x00300000
-#define   PCIE_CLIENT_LINK_STATUS_MASK		0x00300000
-#define PCIE_CLIENT_INT_MASK		(PCIE_CLIENT_BASE + 0x4c)
-#define PCIE_CLIENT_INT_STATUS		(PCIE_CLIENT_BASE + 0x50)
-#define   PCIE_CLIENT_INTR_MASK			GENMASK(8, 5)
-#define   PCIE_CLIENT_INTR_SHIFT		5
-#define   PCIE_CLIENT_INT_LEGACY_DONE		BIT(15)
-#define   PCIE_CLIENT_INT_MSG			BIT(14)
-#define   PCIE_CLIENT_INT_HOT_RST		BIT(13)
-#define   PCIE_CLIENT_INT_DPA			BIT(12)
-#define   PCIE_CLIENT_INT_FATAL_ERR		BIT(11)
-#define   PCIE_CLIENT_INT_NFATAL_ERR		BIT(10)
-#define   PCIE_CLIENT_INT_CORR_ERR		BIT(9)
-#define   PCIE_CLIENT_INT_INTD			BIT(8)
-#define   PCIE_CLIENT_INT_INTC			BIT(7)
-#define   PCIE_CLIENT_INT_INTB			BIT(6)
-#define   PCIE_CLIENT_INT_INTA			BIT(5)
-#define   PCIE_CLIENT_INT_LOCAL			BIT(4)
-#define   PCIE_CLIENT_INT_UDMA			BIT(3)
-#define   PCIE_CLIENT_INT_PHY			BIT(2)
-#define   PCIE_CLIENT_INT_HOT_PLUG		BIT(1)
-#define   PCIE_CLIENT_INT_PWR_STCG		BIT(0)
-
-#define PCIE_CLIENT_INT_LEGACY \
-	(PCIE_CLIENT_INT_INTA | PCIE_CLIENT_INT_INTB | \
-	PCIE_CLIENT_INT_INTC | PCIE_CLIENT_INT_INTD)
-
-#define PCIE_CLIENT_INT_CLI \
-	(PCIE_CLIENT_INT_CORR_ERR | PCIE_CLIENT_INT_NFATAL_ERR | \
-	PCIE_CLIENT_INT_FATAL_ERR | PCIE_CLIENT_INT_DPA | \
-	PCIE_CLIENT_INT_HOT_RST | PCIE_CLIENT_INT_MSG | \
-	PCIE_CLIENT_INT_LEGACY_DONE | PCIE_CLIENT_INT_LEGACY | \
-	PCIE_CLIENT_INT_PHY)
-
-#define PCIE_CORE_CTRL_MGMT_BASE	0x900000
-#define PCIE_CORE_CTRL			(PCIE_CORE_CTRL_MGMT_BASE + 0x000)
-#define   PCIE_CORE_PL_CONF_SPEED_5G		0x00000008
-#define   PCIE_CORE_PL_CONF_SPEED_MASK		0x00000018
-#define   PCIE_CORE_PL_CONF_LANE_MASK		0x00000006
-#define   PCIE_CORE_PL_CONF_LANE_SHIFT		1
-#define PCIE_CORE_CTRL_PLC1		(PCIE_CORE_CTRL_MGMT_BASE + 0x004)
-#define   PCIE_CORE_CTRL_PLC1_FTS_MASK		GENMASK(23, 8)
-#define   PCIE_CORE_CTRL_PLC1_FTS_SHIFT		8
-#define   PCIE_CORE_CTRL_PLC1_FTS_CNT		0xffff
-#define PCIE_CORE_TXCREDIT_CFG1		(PCIE_CORE_CTRL_MGMT_BASE + 0x020)
-#define   PCIE_CORE_TXCREDIT_CFG1_MUI_MASK	0xFFFF0000
-#define   PCIE_CORE_TXCREDIT_CFG1_MUI_SHIFT	16
-#define   PCIE_CORE_TXCREDIT_CFG1_MUI_ENCODE(x) \
-		(((x) >> 3) << PCIE_CORE_TXCREDIT_CFG1_MUI_SHIFT)
-#define PCIE_CORE_LANE_MAP             (PCIE_CORE_CTRL_MGMT_BASE + 0x200)
-#define   PCIE_CORE_LANE_MAP_MASK              0x0000000f
-#define   PCIE_CORE_LANE_MAP_REVERSE           BIT(16)
-#define PCIE_CORE_INT_STATUS		(PCIE_CORE_CTRL_MGMT_BASE + 0x20c)
-#define   PCIE_CORE_INT_PRFPE			BIT(0)
-#define   PCIE_CORE_INT_CRFPE			BIT(1)
-#define   PCIE_CORE_INT_RRPE			BIT(2)
-#define   PCIE_CORE_INT_PRFO			BIT(3)
-#define   PCIE_CORE_INT_CRFO			BIT(4)
-#define   PCIE_CORE_INT_RT			BIT(5)
-#define   PCIE_CORE_INT_RTR			BIT(6)
-#define   PCIE_CORE_INT_PE			BIT(7)
-#define   PCIE_CORE_INT_MTR			BIT(8)
-#define   PCIE_CORE_INT_UCR			BIT(9)
-#define   PCIE_CORE_INT_FCE			BIT(10)
-#define   PCIE_CORE_INT_CT			BIT(11)
-#define   PCIE_CORE_INT_UTC			BIT(18)
-#define   PCIE_CORE_INT_MMVC			BIT(19)
-#define PCIE_CORE_CONFIG_VENDOR		(PCIE_CORE_CTRL_MGMT_BASE + 0x44)
-#define PCIE_CORE_INT_MASK		(PCIE_CORE_CTRL_MGMT_BASE + 0x210)
-#define PCIE_RC_BAR_CONF		(PCIE_CORE_CTRL_MGMT_BASE + 0x300)
-
-#define PCIE_CORE_INT \
-		(PCIE_CORE_INT_PRFPE | PCIE_CORE_INT_CRFPE | \
-		 PCIE_CORE_INT_RRPE | PCIE_CORE_INT_CRFO | \
-		 PCIE_CORE_INT_RT | PCIE_CORE_INT_RTR | \
-		 PCIE_CORE_INT_PE | PCIE_CORE_INT_MTR | \
-		 PCIE_CORE_INT_UCR | PCIE_CORE_INT_FCE | \
-		 PCIE_CORE_INT_CT | PCIE_CORE_INT_UTC | \
-		 PCIE_CORE_INT_MMVC)
-
-#define PCIE_RC_CONFIG_NORMAL_BASE	0x800000
-#define PCIE_RC_CONFIG_BASE		0xa00000
-#define PCIE_RC_CONFIG_RID_CCR		(PCIE_RC_CONFIG_BASE + 0x08)
-#define   PCIE_RC_CONFIG_SCC_SHIFT		16
-#define PCIE_RC_CONFIG_DCR		(PCIE_RC_CONFIG_BASE + 0xc4)
-#define   PCIE_RC_CONFIG_DCR_CSPL_SHIFT		18
-#define   PCIE_RC_CONFIG_DCR_CSPL_LIMIT		0xff
-#define   PCIE_RC_CONFIG_DCR_CPLS_SHIFT		26
-#define PCIE_RC_CONFIG_DCSR		(PCIE_RC_CONFIG_BASE + 0xc8)
-#define   PCIE_RC_CONFIG_DCSR_MPS_MASK		GENMASK(7, 5)
-#define   PCIE_RC_CONFIG_DCSR_MPS_256		(0x1 << 5)
-#define PCIE_RC_CONFIG_LINK_CAP		(PCIE_RC_CONFIG_BASE + 0xcc)
-#define   PCIE_RC_CONFIG_LINK_CAP_L0S		BIT(10)
-#define PCIE_RC_CONFIG_LCS		(PCIE_RC_CONFIG_BASE + 0xd0)
-#define PCIE_RC_CONFIG_L1_SUBSTATE_CTRL2 (PCIE_RC_CONFIG_BASE + 0x90c)
-#define PCIE_RC_CONFIG_THP_CAP		(PCIE_RC_CONFIG_BASE + 0x274)
-#define   PCIE_RC_CONFIG_THP_CAP_NEXT_MASK	GENMASK(31, 20)
-
-#define PCIE_CORE_AXI_CONF_BASE		0xc00000
-#define PCIE_CORE_OB_REGION_ADDR0	(PCIE_CORE_AXI_CONF_BASE + 0x0)
-#define   PCIE_CORE_OB_REGION_ADDR0_NUM_BITS	0x3f
-#define   PCIE_CORE_OB_REGION_ADDR0_LO_ADDR	0xffffff00
-#define PCIE_CORE_OB_REGION_ADDR1	(PCIE_CORE_AXI_CONF_BASE + 0x4)
-#define PCIE_CORE_OB_REGION_DESC0	(PCIE_CORE_AXI_CONF_BASE + 0x8)
-#define PCIE_CORE_OB_REGION_DESC1	(PCIE_CORE_AXI_CONF_BASE + 0xc)
-
-#define PCIE_CORE_AXI_INBOUND_BASE	0xc00800
-#define PCIE_RP_IB_ADDR0		(PCIE_CORE_AXI_INBOUND_BASE + 0x0)
-#define   PCIE_CORE_IB_REGION_ADDR0_NUM_BITS	0x3f
-#define   PCIE_CORE_IB_REGION_ADDR0_LO_ADDR	0xffffff00
-#define PCIE_RP_IB_ADDR1		(PCIE_CORE_AXI_INBOUND_BASE + 0x4)
-
-/* Size of one AXI Region (not Region 0) */
-#define AXI_REGION_SIZE				BIT(20)
-/* Size of Region 0, equal to sum of sizes of other regions */
-#define AXI_REGION_0_SIZE			(32 * (0x1 << 20))
-#define OB_REG_SIZE_SHIFT			5
-#define IB_ROOT_PORT_REG_SIZE_SHIFT		3
-#define AXI_WRAPPER_IO_WRITE			0x6
-#define AXI_WRAPPER_MEM_WRITE			0x2
-#define AXI_WRAPPER_TYPE0_CFG			0xa
-#define AXI_WRAPPER_TYPE1_CFG			0xb
-#define AXI_WRAPPER_NOR_MSG			0xc
-
-#define MAX_AXI_IB_ROOTPORT_REGION_NUM		3
-#define MIN_AXI_ADDR_BITS_PASSED		8
-#define PCIE_RC_SEND_PME_OFF			0x11960
-#define ROCKCHIP_VENDOR_ID			0x1d87
-#define PCIE_ECAM_BUS(x)			(((x) & 0xff) << 20)
-#define PCIE_ECAM_DEV(x)			(((x) & 0x1f) << 15)
-#define PCIE_ECAM_FUNC(x)			(((x) & 0x7) << 12)
-#define PCIE_ECAM_REG(x)			(((x) & 0xfff) << 0)
-#define PCIE_ECAM_ADDR(bus, dev, func, reg) \
-	  (PCIE_ECAM_BUS(bus) | PCIE_ECAM_DEV(dev) | \
-	   PCIE_ECAM_FUNC(func) | PCIE_ECAM_REG(reg))
-#define PCIE_LINK_IS_L2(x) \
-	(((x) & PCIE_CLIENT_DEBUG_LTSSM_MASK) == PCIE_CLIENT_DEBUG_LTSSM_L2)
-#define PCIE_LINK_UP(x) \
-	(((x) & PCIE_CLIENT_LINK_STATUS_MASK) == PCIE_CLIENT_LINK_STATUS_UP)
-#define PCIE_LINK_IS_GEN2(x) \
-	(((x) & PCIE_CORE_PL_CONF_SPEED_MASK) == PCIE_CORE_PL_CONF_SPEED_5G)
-
-#define RC_REGION_0_ADDR_TRANS_H		0x00000000
-#define RC_REGION_0_ADDR_TRANS_L		0x00000000
-#define RC_REGION_0_PASS_BITS			(25 - 1)
-#define RC_REGION_0_TYPE_MASK			GENMASK(3, 0)
-#define MAX_AXI_WRAPPER_REGION_NUM		33
-
-struct rockchip_pcie {
-	void	__iomem *reg_base;		/* DT axi-base */
-	void	__iomem *apb_base;		/* DT apb-base */
-	bool    legacy_phy;
-	struct  phy *phys[MAX_LANE_NUM];
-	struct	reset_control *core_rst;
-	struct	reset_control *mgmt_rst;
-	struct	reset_control *mgmt_sticky_rst;
-	struct	reset_control *pipe_rst;
-	struct	reset_control *pm_rst;
-	struct	reset_control *aclk_rst;
-	struct	reset_control *pclk_rst;
-	struct	clk *aclk_pcie;
-	struct	clk *aclk_perf_pcie;
-	struct	clk *hclk_pcie;
-	struct	clk *clk_pcie_pm;
-	struct	regulator *vpcie12v; /* 12V power supply */
-	struct	regulator *vpcie3v3; /* 3.3V power supply */
-	struct	regulator *vpcie1v8; /* 1.8V power supply */
-	struct	regulator *vpcie0v9; /* 0.9V power supply */
-	struct	gpio_desc *ep_gpio;
-	u32	lanes;
-	u8      lanes_map;
-	u8	root_bus_nr;
-	int	link_gen;
-	struct	device *dev;
-	struct	irq_domain *irq_domain;
-	int     offset;
-	struct pci_bus *root_bus;
-	struct resource *io;
-	phys_addr_t io_bus_addr;
-	u32     io_size;
-	void    __iomem *msg_region;
-	u32     mem_size;
-	phys_addr_t msg_bus_addr;
-	phys_addr_t mem_bus_addr;
-};
-
-static u32 rockchip_pcie_read(struct rockchip_pcie *rockchip, u32 reg)
-{
-	return readl(rockchip->apb_base + reg);
-}
-
-static void rockchip_pcie_write(struct rockchip_pcie *rockchip, u32 val,
-				u32 reg)
-{
-	writel(val, rockchip->apb_base + reg);
-}
-
-static void rockchip_pcie_enable_bw_int(struct rockchip_pcie *rockchip)
-{
-	u32 status;
-
-	status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
-	status |= (PCI_EXP_LNKCTL_LBMIE | PCI_EXP_LNKCTL_LABIE);
-	rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
-}
-
-static void rockchip_pcie_clr_bw_int(struct rockchip_pcie *rockchip)
-{
-	u32 status;
-
-	status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
-	status |= (PCI_EXP_LNKSTA_LBMS | PCI_EXP_LNKSTA_LABS) << 16;
-	rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
-}
-
-static void rockchip_pcie_update_txcredit_mui(struct rockchip_pcie *rockchip)
-{
-	u32 val;
-
-	/* Update Tx credit maximum update interval */
-	val = rockchip_pcie_read(rockchip, PCIE_CORE_TXCREDIT_CFG1);
-	val &= ~PCIE_CORE_TXCREDIT_CFG1_MUI_MASK;
-	val |= PCIE_CORE_TXCREDIT_CFG1_MUI_ENCODE(24000);	/* ns */
-	rockchip_pcie_write(rockchip, val, PCIE_CORE_TXCREDIT_CFG1);
-}
-
-static int rockchip_pcie_valid_device(struct rockchip_pcie *rockchip,
-				      struct pci_bus *bus, int dev)
-{
-	/* access only one slot on each root port */
-	if (bus->number == rockchip->root_bus_nr && dev > 0)
-		return 0;
-
-	/*
-	 * do not read more than one device on the bus directly attached
-	 * to RC's downstream side.
-	 */
-	if (bus->primary == rockchip->root_bus_nr && dev > 0)
-		return 0;
-
-	return 1;
-}
-
-static u8 rockchip_pcie_lane_map(struct rockchip_pcie *rockchip)
-{
-	u32 val;
-	u8 map;
-
-	if (rockchip->legacy_phy)
-		return GENMASK(MAX_LANE_NUM - 1, 0);
-
-	val = rockchip_pcie_read(rockchip, PCIE_CORE_LANE_MAP);
-	map = val & PCIE_CORE_LANE_MAP_MASK;
-
-	/* The link may be using a reverse-indexed mapping. */
-	if (val & PCIE_CORE_LANE_MAP_REVERSE)
-		map = bitrev8(map) >> 4;
-
-	return map;
-}
-
-static int rockchip_pcie_rd_own_conf(struct rockchip_pcie *rockchip,
-				     int where, int size, u32 *val)
-{
-	void __iomem *addr;
-
-	addr = rockchip->apb_base + PCIE_RC_CONFIG_NORMAL_BASE + where;
-
-	if (!IS_ALIGNED((uintptr_t)addr, size)) {
-		*val = 0;
-		return PCIBIOS_BAD_REGISTER_NUMBER;
-	}
-
-	if (size == 4) {
-		*val = readl(addr);
-	} else if (size == 2) {
-		*val = readw(addr);
-	} else if (size == 1) {
-		*val = readb(addr);
-	} else {
-		*val = 0;
-		return PCIBIOS_BAD_REGISTER_NUMBER;
-	}
-	return PCIBIOS_SUCCESSFUL;
-}
-
-static int rockchip_pcie_wr_own_conf(struct rockchip_pcie *rockchip,
-				     int where, int size, u32 val)
-{
-	u32 mask, tmp, offset;
-	void __iomem *addr;
-
-	offset = where & ~0x3;
-	addr = rockchip->apb_base + PCIE_RC_CONFIG_NORMAL_BASE + offset;
-
-	if (size == 4) {
-		writel(val, addr);
-		return PCIBIOS_SUCCESSFUL;
-	}
-
-	mask = ~(((1 << (size * 8)) - 1) << ((where & 0x3) * 8));
-
-	/*
-	 * N.B. This read/modify/write isn't safe in general because it can
-	 * corrupt RW1C bits in adjacent registers.  But the hardware
-	 * doesn't support smaller writes.
-	 */
-	tmp = readl(addr) & mask;
-	tmp |= val << ((where & 0x3) * 8);
-	writel(tmp, addr);
-
-	return PCIBIOS_SUCCESSFUL;
-}
-
-static void rockchip_pcie_cfg_configuration_accesses(
-		struct rockchip_pcie *rockchip, u32 type)
-{
-	u32 ob_desc_0;
-
-	/* Configuration Accesses for region 0 */
-	rockchip_pcie_write(rockchip, 0x0, PCIE_RC_BAR_CONF);
-
-	rockchip_pcie_write(rockchip,
-			    (RC_REGION_0_ADDR_TRANS_L + RC_REGION_0_PASS_BITS),
-			    PCIE_CORE_OB_REGION_ADDR0);
-	rockchip_pcie_write(rockchip, RC_REGION_0_ADDR_TRANS_H,
-			    PCIE_CORE_OB_REGION_ADDR1);
-	ob_desc_0 = rockchip_pcie_read(rockchip, PCIE_CORE_OB_REGION_DESC0);
-	ob_desc_0 &= ~(RC_REGION_0_TYPE_MASK);
-	ob_desc_0 |= (type | (0x1 << 23));
-	rockchip_pcie_write(rockchip, ob_desc_0, PCIE_CORE_OB_REGION_DESC0);
-	rockchip_pcie_write(rockchip, 0x0, PCIE_CORE_OB_REGION_DESC1);
-}
-
-static int rockchip_pcie_rd_other_conf(struct rockchip_pcie *rockchip,
-				       struct pci_bus *bus, u32 devfn,
-				       int where, int size, u32 *val)
-{
-	u32 busdev;
-
-	busdev = PCIE_ECAM_ADDR(bus->number, PCI_SLOT(devfn),
-				PCI_FUNC(devfn), where);
-
-	if (!IS_ALIGNED(busdev, size)) {
-		*val = 0;
-		return PCIBIOS_BAD_REGISTER_NUMBER;
-	}
-
-	if (bus->parent->number == rockchip->root_bus_nr)
-		rockchip_pcie_cfg_configuration_accesses(rockchip,
-						AXI_WRAPPER_TYPE0_CFG);
-	else
-		rockchip_pcie_cfg_configuration_accesses(rockchip,
-						AXI_WRAPPER_TYPE1_CFG);
-
-	if (size == 4) {
-		*val = readl(rockchip->reg_base + busdev);
-	} else if (size == 2) {
-		*val = readw(rockchip->reg_base + busdev);
-	} else if (size == 1) {
-		*val = readb(rockchip->reg_base + busdev);
-	} else {
-		*val = 0;
-		return PCIBIOS_BAD_REGISTER_NUMBER;
-	}
-	return PCIBIOS_SUCCESSFUL;
-}
-
-static int rockchip_pcie_wr_other_conf(struct rockchip_pcie *rockchip,
-				       struct pci_bus *bus, u32 devfn,
-				       int where, int size, u32 val)
-{
-	u32 busdev;
-
-	busdev = PCIE_ECAM_ADDR(bus->number, PCI_SLOT(devfn),
-				PCI_FUNC(devfn), where);
-	if (!IS_ALIGNED(busdev, size))
-		return PCIBIOS_BAD_REGISTER_NUMBER;
-
-	if (bus->parent->number == rockchip->root_bus_nr)
-		rockchip_pcie_cfg_configuration_accesses(rockchip,
-						AXI_WRAPPER_TYPE0_CFG);
-	else
-		rockchip_pcie_cfg_configuration_accesses(rockchip,
-						AXI_WRAPPER_TYPE1_CFG);
-
-	if (size == 4)
-		writel(val, rockchip->reg_base + busdev);
-	else if (size == 2)
-		writew(val, rockchip->reg_base + busdev);
-	else if (size == 1)
-		writeb(val, rockchip->reg_base + busdev);
-	else
-		return PCIBIOS_BAD_REGISTER_NUMBER;
-
-	return PCIBIOS_SUCCESSFUL;
-}
-
-static int rockchip_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
-				 int size, u32 *val)
-{
-	struct rockchip_pcie *rockchip = bus->sysdata;
-
-	if (!rockchip_pcie_valid_device(rockchip, bus, PCI_SLOT(devfn))) {
-		*val = 0xffffffff;
-		return PCIBIOS_DEVICE_NOT_FOUND;
-	}
-
-	if (bus->number == rockchip->root_bus_nr)
-		return rockchip_pcie_rd_own_conf(rockchip, where, size, val);
-
-	return rockchip_pcie_rd_other_conf(rockchip, bus, devfn, where, size, val);
-}
-
-static int rockchip_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
-				 int where, int size, u32 val)
-{
-	struct rockchip_pcie *rockchip = bus->sysdata;
-
-	if (!rockchip_pcie_valid_device(rockchip, bus, PCI_SLOT(devfn)))
-		return PCIBIOS_DEVICE_NOT_FOUND;
-
-	if (bus->number == rockchip->root_bus_nr)
-		return rockchip_pcie_wr_own_conf(rockchip, where, size, val);
-
-	return rockchip_pcie_wr_other_conf(rockchip, bus, devfn, where, size, val);
-}
-
-static struct pci_ops rockchip_pcie_ops = {
-	.read = rockchip_pcie_rd_conf,
-	.write = rockchip_pcie_wr_conf,
-};
-
-static void rockchip_pcie_set_power_limit(struct rockchip_pcie *rockchip)
-{
-	int curr;
-	u32 status, scale, power;
-
-	if (IS_ERR(rockchip->vpcie3v3))
-		return;
-
-	/*
-	 * Set RC's captured slot power limit and scale if
-	 * vpcie3v3 available. The default values are both zero
-	 * which means the software should set these two according
-	 * to the actual power supply.
-	 */
-	curr = regulator_get_current_limit(rockchip->vpcie3v3);
-	if (curr <= 0)
-		return;
-
-	scale = 3; /* 0.001x */
-	curr = curr / 1000; /* convert to mA */
-	power = (curr * 3300) / 1000; /* milliwatt */
-	while (power > PCIE_RC_CONFIG_DCR_CSPL_LIMIT) {
-		if (!scale) {
-			dev_warn(rockchip->dev, "invalid power supply\n");
-			return;
-		}
-		scale--;
-		power = power / 10;
-	}
-
-	status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_DCR);
-	status |= (power << PCIE_RC_CONFIG_DCR_CSPL_SHIFT) |
-		  (scale << PCIE_RC_CONFIG_DCR_CPLS_SHIFT);
-	rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_DCR);
-}
-
-/**
- * rockchip_pcie_init_port - Initialize hardware
- * @rockchip: PCIe port information
- */
-static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
-{
-	struct device *dev = rockchip->dev;
-	int err, i;
-	u32 status;
-
-	gpiod_set_value_cansleep(rockchip->ep_gpio, 0);
-
-	err = reset_control_assert(rockchip->aclk_rst);
-	if (err) {
-		dev_err(dev, "assert aclk_rst err %d\n", err);
-		return err;
-	}
-
-	err = reset_control_assert(rockchip->pclk_rst);
-	if (err) {
-		dev_err(dev, "assert pclk_rst err %d\n", err);
-		return err;
-	}
-
-	err = reset_control_assert(rockchip->pm_rst);
-	if (err) {
-		dev_err(dev, "assert pm_rst err %d\n", err);
-		return err;
-	}
-
-	for (i = 0; i < MAX_LANE_NUM; i++) {
-		err = phy_init(rockchip->phys[i]);
-		if (err) {
-			dev_err(dev, "init phy%d err %d\n", i, err);
-			goto err_exit_phy;
-		}
-	}
-
-	err = reset_control_assert(rockchip->core_rst);
-	if (err) {
-		dev_err(dev, "assert core_rst err %d\n", err);
-		goto err_exit_phy;
-	}
-
-	err = reset_control_assert(rockchip->mgmt_rst);
-	if (err) {
-		dev_err(dev, "assert mgmt_rst err %d\n", err);
-		goto err_exit_phy;
-	}
-
-	err = reset_control_assert(rockchip->mgmt_sticky_rst);
-	if (err) {
-		dev_err(dev, "assert mgmt_sticky_rst err %d\n", err);
-		goto err_exit_phy;
-	}
-
-	err = reset_control_assert(rockchip->pipe_rst);
-	if (err) {
-		dev_err(dev, "assert pipe_rst err %d\n", err);
-		goto err_exit_phy;
-	}
-
-	udelay(10);
-
-	err = reset_control_deassert(rockchip->pm_rst);
-	if (err) {
-		dev_err(dev, "deassert pm_rst err %d\n", err);
-		goto err_exit_phy;
-	}
-
-	err = reset_control_deassert(rockchip->aclk_rst);
-	if (err) {
-		dev_err(dev, "deassert aclk_rst err %d\n", err);
-		goto err_exit_phy;
-	}
-
-	err = reset_control_deassert(rockchip->pclk_rst);
-	if (err) {
-		dev_err(dev, "deassert pclk_rst err %d\n", err);
-		goto err_exit_phy;
-	}
-
-	if (rockchip->link_gen == 2)
-		rockchip_pcie_write(rockchip, PCIE_CLIENT_GEN_SEL_2,
-				    PCIE_CLIENT_CONFIG);
-	else
-		rockchip_pcie_write(rockchip, PCIE_CLIENT_GEN_SEL_1,
-				    PCIE_CLIENT_CONFIG);
-
-	rockchip_pcie_write(rockchip,
-			    PCIE_CLIENT_CONF_ENABLE |
-			    PCIE_CLIENT_LINK_TRAIN_ENABLE |
-			    PCIE_CLIENT_ARI_ENABLE |
-			    PCIE_CLIENT_CONF_LANE_NUM(rockchip->lanes) |
-			    PCIE_CLIENT_MODE_RC,
-			    PCIE_CLIENT_CONFIG);
-
-	for (i = 0; i < MAX_LANE_NUM; i++) {
-		err = phy_power_on(rockchip->phys[i]);
-		if (err) {
-			dev_err(dev, "power on phy%d err %d\n", i, err);
-			goto err_power_off_phy;
-		}
-	}
-
-	/*
-	 * Please don't reorder the deassert sequence of the following
-	 * four reset pins.
-	 */
-	err = reset_control_deassert(rockchip->mgmt_sticky_rst);
-	if (err) {
-		dev_err(dev, "deassert mgmt_sticky_rst err %d\n", err);
-		goto err_power_off_phy;
-	}
-
-	err = reset_control_deassert(rockchip->core_rst);
-	if (err) {
-		dev_err(dev, "deassert core_rst err %d\n", err);
-		goto err_power_off_phy;
-	}
-
-	err = reset_control_deassert(rockchip->mgmt_rst);
-	if (err) {
-		dev_err(dev, "deassert mgmt_rst err %d\n", err);
-		goto err_power_off_phy;
-	}
-
-	err = reset_control_deassert(rockchip->pipe_rst);
-	if (err) {
-		dev_err(dev, "deassert pipe_rst err %d\n", err);
-		goto err_power_off_phy;
-	}
-
-	/* Fix the transmitted FTS count desired to exit from L0s. */
-	status = rockchip_pcie_read(rockchip, PCIE_CORE_CTRL_PLC1);
-	status = (status & ~PCIE_CORE_CTRL_PLC1_FTS_MASK) |
-		 (PCIE_CORE_CTRL_PLC1_FTS_CNT << PCIE_CORE_CTRL_PLC1_FTS_SHIFT);
-	rockchip_pcie_write(rockchip, status, PCIE_CORE_CTRL_PLC1);
-
-	rockchip_pcie_set_power_limit(rockchip);
-
-	/* Set RC's clock architecture as common clock */
-	status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
-	status |= PCI_EXP_LNKSTA_SLC << 16;
-	rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
-
-	/* Set RC's RCB to 128 */
-	status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
-	status |= PCI_EXP_LNKCTL_RCB;
-	rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
-
-	/* Enable Gen1 training */
-	rockchip_pcie_write(rockchip, PCIE_CLIENT_LINK_TRAIN_ENABLE,
-			    PCIE_CLIENT_CONFIG);
-
-	gpiod_set_value_cansleep(rockchip->ep_gpio, 1);
-
-	/* 500ms timeout value should be enough for Gen1/2 training */
-	err = readl_poll_timeout(rockchip->apb_base + PCIE_CLIENT_BASIC_STATUS1,
-				 status, PCIE_LINK_UP(status), 20,
-				 500 * USEC_PER_MSEC);
-	if (err) {
-		dev_err(dev, "PCIe link training gen1 timeout!\n");
-		goto err_power_off_phy;
-	}
-
-	if (rockchip->link_gen == 2) {
-		/*
-		 * Enable retrain for gen2. This should be configured only after
-		 * gen1 finished.
-		 */
-		status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
-		status |= PCI_EXP_LNKCTL_RL;
-		rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
-
-		err = readl_poll_timeout(rockchip->apb_base + PCIE_CORE_CTRL,
-					 status, PCIE_LINK_IS_GEN2(status), 20,
-					 500 * USEC_PER_MSEC);
-		if (err)
-			dev_dbg(dev, "PCIe link training gen2 timeout, fall back to gen1!\n");
-	}
-
-	/* Check the final link width from negotiated lane counter from MGMT */
-	status = rockchip_pcie_read(rockchip, PCIE_CORE_CTRL);
-	status = 0x1 << ((status & PCIE_CORE_PL_CONF_LANE_MASK) >>
-			  PCIE_CORE_PL_CONF_LANE_SHIFT);
-	dev_dbg(dev, "current link width is x%d\n", status);
-
-	/* Power off unused lane(s) */
-	rockchip->lanes_map = rockchip_pcie_lane_map(rockchip);
-	for (i = 0; i < MAX_LANE_NUM; i++) {
-		if (!(rockchip->lanes_map & BIT(i))) {
-			dev_dbg(dev, "idling lane %d\n", i);
-			phy_power_off(rockchip->phys[i]);
-		}
-	}
-
-	rockchip_pcie_write(rockchip, ROCKCHIP_VENDOR_ID,
-			    PCIE_CORE_CONFIG_VENDOR);
-	rockchip_pcie_write(rockchip,
-			    PCI_CLASS_BRIDGE_PCI << PCIE_RC_CONFIG_SCC_SHIFT,
-			    PCIE_RC_CONFIG_RID_CCR);
-
-	/* Clear THP cap's next cap pointer to remove L1 substate cap */
-	status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_THP_CAP);
-	status &= ~PCIE_RC_CONFIG_THP_CAP_NEXT_MASK;
-	rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_THP_CAP);
-
-	/* Clear L0s from RC's link cap */
-	if (of_property_read_bool(dev->of_node, "aspm-no-l0s")) {
-		status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LINK_CAP);
-		status &= ~PCIE_RC_CONFIG_LINK_CAP_L0S;
-		rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LINK_CAP);
-	}
-
-	status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_DCSR);
-	status &= ~PCIE_RC_CONFIG_DCSR_MPS_MASK;
-	status |= PCIE_RC_CONFIG_DCSR_MPS_256;
-	rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_DCSR);
-
-	return 0;
-err_power_off_phy:
-	while (i--)
-		phy_power_off(rockchip->phys[i]);
-	i = MAX_LANE_NUM;
-err_exit_phy:
-	while (i--)
-		phy_exit(rockchip->phys[i]);
-	return err;
-}
-
-static void rockchip_pcie_deinit_phys(struct rockchip_pcie *rockchip)
-{
-	int i;
-
-	for (i = 0; i < MAX_LANE_NUM; i++) {
-		/* inactive lanes are already powered off */
-		if (rockchip->lanes_map & BIT(i))
-			phy_power_off(rockchip->phys[i]);
-		phy_exit(rockchip->phys[i]);
-	}
-}
-
-static irqreturn_t rockchip_pcie_subsys_irq_handler(int irq, void *arg)
-{
-	struct rockchip_pcie *rockchip = arg;
-	struct device *dev = rockchip->dev;
-	u32 reg;
-	u32 sub_reg;
-
-	reg = rockchip_pcie_read(rockchip, PCIE_CLIENT_INT_STATUS);
-	if (reg & PCIE_CLIENT_INT_LOCAL) {
-		dev_dbg(dev, "local interrupt received\n");
-		sub_reg = rockchip_pcie_read(rockchip, PCIE_CORE_INT_STATUS);
-		if (sub_reg & PCIE_CORE_INT_PRFPE)
-			dev_dbg(dev, "parity error detected while reading from the PNP receive FIFO RAM\n");
-
-		if (sub_reg & PCIE_CORE_INT_CRFPE)
-			dev_dbg(dev, "parity error detected while reading from the Completion Receive FIFO RAM\n");
-
-		if (sub_reg & PCIE_CORE_INT_RRPE)
-			dev_dbg(dev, "parity error detected while reading from replay buffer RAM\n");
-
-		if (sub_reg & PCIE_CORE_INT_PRFO)
-			dev_dbg(dev, "overflow occurred in the PNP receive FIFO\n");
-
-		if (sub_reg & PCIE_CORE_INT_CRFO)
-			dev_dbg(dev, "overflow occurred in the completion receive FIFO\n");
-
-		if (sub_reg & PCIE_CORE_INT_RT)
-			dev_dbg(dev, "replay timer timed out\n");
-
-		if (sub_reg & PCIE_CORE_INT_RTR)
-			dev_dbg(dev, "replay timer rolled over after 4 transmissions of the same TLP\n");
-
-		if (sub_reg & PCIE_CORE_INT_PE)
-			dev_dbg(dev, "phy error detected on receive side\n");
-
-		if (sub_reg & PCIE_CORE_INT_MTR)
-			dev_dbg(dev, "malformed TLP received from the link\n");
-
-		if (sub_reg & PCIE_CORE_INT_UCR)
-			dev_dbg(dev, "malformed TLP received from the link\n");
-
-		if (sub_reg & PCIE_CORE_INT_FCE)
-			dev_dbg(dev, "an error was observed in the flow control advertisements from the other side\n");
-
-		if (sub_reg & PCIE_CORE_INT_CT)
-			dev_dbg(dev, "a request timed out waiting for completion\n");
-
-		if (sub_reg & PCIE_CORE_INT_UTC)
-			dev_dbg(dev, "unmapped TC error\n");
-
-		if (sub_reg & PCIE_CORE_INT_MMVC)
-			dev_dbg(dev, "MSI mask register changes\n");
-
-		rockchip_pcie_write(rockchip, sub_reg, PCIE_CORE_INT_STATUS);
-	} else if (reg & PCIE_CLIENT_INT_PHY) {
-		dev_dbg(dev, "phy link changes\n");
-		rockchip_pcie_update_txcredit_mui(rockchip);
-		rockchip_pcie_clr_bw_int(rockchip);
-	}
-
-	rockchip_pcie_write(rockchip, reg & PCIE_CLIENT_INT_LOCAL,
-			    PCIE_CLIENT_INT_STATUS);
-
-	return IRQ_HANDLED;
-}
-
-static irqreturn_t rockchip_pcie_client_irq_handler(int irq, void *arg)
-{
-	struct rockchip_pcie *rockchip = arg;
-	struct device *dev = rockchip->dev;
-	u32 reg;
-
-	reg = rockchip_pcie_read(rockchip, PCIE_CLIENT_INT_STATUS);
-	if (reg & PCIE_CLIENT_INT_LEGACY_DONE)
-		dev_dbg(dev, "legacy done interrupt received\n");
-
-	if (reg & PCIE_CLIENT_INT_MSG)
-		dev_dbg(dev, "message done interrupt received\n");
-
-	if (reg & PCIE_CLIENT_INT_HOT_RST)
-		dev_dbg(dev, "hot reset interrupt received\n");
-
-	if (reg & PCIE_CLIENT_INT_DPA)
-		dev_dbg(dev, "dpa interrupt received\n");
-
-	if (reg & PCIE_CLIENT_INT_FATAL_ERR)
-		dev_dbg(dev, "fatal error interrupt received\n");
-
-	if (reg & PCIE_CLIENT_INT_NFATAL_ERR)
-		dev_dbg(dev, "no fatal error interrupt received\n");
-
-	if (reg & PCIE_CLIENT_INT_CORR_ERR)
-		dev_dbg(dev, "correctable error interrupt received\n");
-
-	if (reg & PCIE_CLIENT_INT_PHY)
-		dev_dbg(dev, "phy interrupt received\n");
-
-	rockchip_pcie_write(rockchip, reg & (PCIE_CLIENT_INT_LEGACY_DONE |
-			      PCIE_CLIENT_INT_MSG | PCIE_CLIENT_INT_HOT_RST |
-			      PCIE_CLIENT_INT_DPA | PCIE_CLIENT_INT_FATAL_ERR |
-			      PCIE_CLIENT_INT_NFATAL_ERR |
-			      PCIE_CLIENT_INT_CORR_ERR |
-			      PCIE_CLIENT_INT_PHY),
-		   PCIE_CLIENT_INT_STATUS);
-
-	return IRQ_HANDLED;
-}
-
-static void rockchip_pcie_legacy_int_handler(struct irq_desc *desc)
-{
-	struct irq_chip *chip = irq_desc_get_chip(desc);
-	struct rockchip_pcie *rockchip = irq_desc_get_handler_data(desc);
-	struct device *dev = rockchip->dev;
-	u32 reg;
-	u32 hwirq;
-	u32 virq;
-
-	chained_irq_enter(chip, desc);
-
-	reg = rockchip_pcie_read(rockchip, PCIE_CLIENT_INT_STATUS);
-	reg = (reg & PCIE_CLIENT_INTR_MASK) >> PCIE_CLIENT_INTR_SHIFT;
-
-	while (reg) {
-		hwirq = ffs(reg) - 1;
-		reg &= ~BIT(hwirq);
-
-		virq = irq_find_mapping(rockchip->irq_domain, hwirq);
-		if (virq)
-			generic_handle_irq(virq);
-		else
-			dev_err(dev, "unexpected IRQ, INT%d\n", hwirq);
-	}
-
-	chained_irq_exit(chip, desc);
-}
+#include "pcie-rockchip.h"
 
-static int rockchip_pcie_get_phys(struct rockchip_pcie *rockchip)
+int rockchip_pcie_get_phys(struct rockchip_pcie *rockchip)
 {
 	struct device *dev = rockchip->dev;
 	struct phy *phy;
@@ -948,452 +56,22 @@ static int rockchip_pcie_get_phys(struct rockchip_pcie *rockchip)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(rockchip_pcie_get_phys);
 
-static int rockchip_pcie_setup_irq(struct rockchip_pcie *rockchip)
-{
-	int irq, err;
-	struct device *dev = rockchip->dev;
-	struct platform_device *pdev = to_platform_device(dev);
-
-	irq = platform_get_irq_byname(pdev, "sys");
-	if (irq < 0) {
-		dev_err(dev, "missing sys IRQ resource\n");
-		return irq;
-	}
-
-	err = devm_request_irq(dev, irq, rockchip_pcie_subsys_irq_handler,
-			       IRQF_SHARED, "pcie-sys", rockchip);
-	if (err) {
-		dev_err(dev, "failed to request PCIe subsystem IRQ\n");
-		return err;
-	}
-
-	irq = platform_get_irq_byname(pdev, "legacy");
-	if (irq < 0) {
-		dev_err(dev, "missing legacy IRQ resource\n");
-		return irq;
-	}
-
-	irq_set_chained_handler_and_data(irq,
-					 rockchip_pcie_legacy_int_handler,
-					 rockchip);
-
-	irq = platform_get_irq_byname(pdev, "client");
-	if (irq < 0) {
-		dev_err(dev, "missing client IRQ resource\n");
-		return irq;
-	}
-
-	err = devm_request_irq(dev, irq, rockchip_pcie_client_irq_handler,
-			       IRQF_SHARED, "pcie-client", rockchip);
-	if (err) {
-		dev_err(dev, "failed to request PCIe client IRQ\n");
-		return err;
-	}
-
-	return 0;
-}
-
-/**
- * rockchip_pcie_parse_dt - Parse Device Tree
- * @rockchip: PCIe port information
- *
- * Return: '0' on success and error value on failure
- */
-static int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
-{
-	struct device *dev = rockchip->dev;
-	struct platform_device *pdev = to_platform_device(dev);
-	struct device_node *node = dev->of_node;
-	struct resource *regs;
-	int err;
-
-	regs = platform_get_resource_byname(pdev,
-					    IORESOURCE_MEM,
-					    "axi-base");
-	rockchip->reg_base = devm_pci_remap_cfg_resource(dev, regs);
-	if (IS_ERR(rockchip->reg_base))
-		return PTR_ERR(rockchip->reg_base);
-
-	regs = platform_get_resource_byname(pdev,
-					    IORESOURCE_MEM,
-					    "apb-base");
-	rockchip->apb_base = devm_ioremap_resource(dev, regs);
-	if (IS_ERR(rockchip->apb_base))
-		return PTR_ERR(rockchip->apb_base);
-
-	err = rockchip_pcie_get_phys(rockchip);
-	if (err)
-		return err;
-
-	rockchip->lanes = 1;
-	err = of_property_read_u32(node, "num-lanes", &rockchip->lanes);
-	if (!err && (rockchip->lanes == 0 ||
-		     rockchip->lanes == 3 ||
-		     rockchip->lanes > 4)) {
-		dev_warn(dev, "invalid num-lanes, default to use one lane\n");
-		rockchip->lanes = 1;
-	}
-
-	rockchip->link_gen = of_pci_get_max_link_speed(node);
-	if (rockchip->link_gen < 0 || rockchip->link_gen > 2)
-		rockchip->link_gen = 2;
-
-	rockchip->core_rst = devm_reset_control_get_exclusive(dev, "core");
-	if (IS_ERR(rockchip->core_rst)) {
-		if (PTR_ERR(rockchip->core_rst) != -EPROBE_DEFER)
-			dev_err(dev, "missing core reset property in node\n");
-		return PTR_ERR(rockchip->core_rst);
-	}
-
-	rockchip->mgmt_rst = devm_reset_control_get_exclusive(dev, "mgmt");
-	if (IS_ERR(rockchip->mgmt_rst)) {
-		if (PTR_ERR(rockchip->mgmt_rst) != -EPROBE_DEFER)
-			dev_err(dev, "missing mgmt reset property in node\n");
-		return PTR_ERR(rockchip->mgmt_rst);
-	}
-
-	rockchip->mgmt_sticky_rst = devm_reset_control_get_exclusive(dev,
-								     "mgmt-sticky");
-	if (IS_ERR(rockchip->mgmt_sticky_rst)) {
-		if (PTR_ERR(rockchip->mgmt_sticky_rst) != -EPROBE_DEFER)
-			dev_err(dev, "missing mgmt-sticky reset property in node\n");
-		return PTR_ERR(rockchip->mgmt_sticky_rst);
-	}
-
-	rockchip->pipe_rst = devm_reset_control_get_exclusive(dev, "pipe");
-	if (IS_ERR(rockchip->pipe_rst)) {
-		if (PTR_ERR(rockchip->pipe_rst) != -EPROBE_DEFER)
-			dev_err(dev, "missing pipe reset property in node\n");
-		return PTR_ERR(rockchip->pipe_rst);
-	}
-
-	rockchip->pm_rst = devm_reset_control_get_exclusive(dev, "pm");
-	if (IS_ERR(rockchip->pm_rst)) {
-		if (PTR_ERR(rockchip->pm_rst) != -EPROBE_DEFER)
-			dev_err(dev, "missing pm reset property in node\n");
-		return PTR_ERR(rockchip->pm_rst);
-	}
-
-	rockchip->pclk_rst = devm_reset_control_get_exclusive(dev, "pclk");
-	if (IS_ERR(rockchip->pclk_rst)) {
-		if (PTR_ERR(rockchip->pclk_rst) != -EPROBE_DEFER)
-			dev_err(dev, "missing pclk reset property in node\n");
-		return PTR_ERR(rockchip->pclk_rst);
-	}
-
-	rockchip->aclk_rst = devm_reset_control_get_exclusive(dev, "aclk");
-	if (IS_ERR(rockchip->aclk_rst)) {
-		if (PTR_ERR(rockchip->aclk_rst) != -EPROBE_DEFER)
-			dev_err(dev, "missing aclk reset property in node\n");
-		return PTR_ERR(rockchip->aclk_rst);
-	}
-
-	rockchip->ep_gpio = devm_gpiod_get(dev, "ep", GPIOD_OUT_HIGH);
-	if (IS_ERR(rockchip->ep_gpio)) {
-		dev_err(dev, "missing ep-gpios property in node\n");
-		return PTR_ERR(rockchip->ep_gpio);
-	}
-
-	rockchip->aclk_pcie = devm_clk_get(dev, "aclk");
-	if (IS_ERR(rockchip->aclk_pcie)) {
-		dev_err(dev, "aclk clock not found\n");
-		return PTR_ERR(rockchip->aclk_pcie);
-	}
-
-	rockchip->aclk_perf_pcie = devm_clk_get(dev, "aclk-perf");
-	if (IS_ERR(rockchip->aclk_perf_pcie)) {
-		dev_err(dev, "aclk_perf clock not found\n");
-		return PTR_ERR(rockchip->aclk_perf_pcie);
-	}
-
-	rockchip->hclk_pcie = devm_clk_get(dev, "hclk");
-	if (IS_ERR(rockchip->hclk_pcie)) {
-		dev_err(dev, "hclk clock not found\n");
-		return PTR_ERR(rockchip->hclk_pcie);
-	}
-
-	rockchip->clk_pcie_pm = devm_clk_get(dev, "pm");
-	if (IS_ERR(rockchip->clk_pcie_pm)) {
-		dev_err(dev, "pm clock not found\n");
-		return PTR_ERR(rockchip->clk_pcie_pm);
-	}
-
-	err = rockchip_pcie_setup_irq(rockchip);
-	if (err)
-		return err;
-
-	rockchip->vpcie12v = devm_regulator_get_optional(dev, "vpcie12v");
-	if (IS_ERR(rockchip->vpcie12v)) {
-		if (PTR_ERR(rockchip->vpcie12v) == -EPROBE_DEFER)
-			return -EPROBE_DEFER;
-		dev_info(dev, "no vpcie12v regulator found\n");
-	}
-
-	rockchip->vpcie3v3 = devm_regulator_get_optional(dev, "vpcie3v3");
-	if (IS_ERR(rockchip->vpcie3v3)) {
-		if (PTR_ERR(rockchip->vpcie3v3) == -EPROBE_DEFER)
-			return -EPROBE_DEFER;
-		dev_info(dev, "no vpcie3v3 regulator found\n");
-	}
-
-	rockchip->vpcie1v8 = devm_regulator_get_optional(dev, "vpcie1v8");
-	if (IS_ERR(rockchip->vpcie1v8)) {
-		if (PTR_ERR(rockchip->vpcie1v8) == -EPROBE_DEFER)
-			return -EPROBE_DEFER;
-		dev_info(dev, "no vpcie1v8 regulator found\n");
-	}
-
-	rockchip->vpcie0v9 = devm_regulator_get_optional(dev, "vpcie0v9");
-	if (IS_ERR(rockchip->vpcie0v9)) {
-		if (PTR_ERR(rockchip->vpcie0v9) == -EPROBE_DEFER)
-			return -EPROBE_DEFER;
-		dev_info(dev, "no vpcie0v9 regulator found\n");
-	}
-
-	return 0;
-}
-
-static int rockchip_pcie_set_vpcie(struct rockchip_pcie *rockchip)
-{
-	struct device *dev = rockchip->dev;
-	int err;
-
-	if (!IS_ERR(rockchip->vpcie12v)) {
-		err = regulator_enable(rockchip->vpcie12v);
-		if (err) {
-			dev_err(dev, "fail to enable vpcie12v regulator\n");
-			goto err_out;
-		}
-	}
-
-	if (!IS_ERR(rockchip->vpcie3v3)) {
-		err = regulator_enable(rockchip->vpcie3v3);
-		if (err) {
-			dev_err(dev, "fail to enable vpcie3v3 regulator\n");
-			goto err_disable_12v;
-		}
-	}
-
-	if (!IS_ERR(rockchip->vpcie1v8)) {
-		err = regulator_enable(rockchip->vpcie1v8);
-		if (err) {
-			dev_err(dev, "fail to enable vpcie1v8 regulator\n");
-			goto err_disable_3v3;
-		}
-	}
-
-	if (!IS_ERR(rockchip->vpcie0v9)) {
-		err = regulator_enable(rockchip->vpcie0v9);
-		if (err) {
-			dev_err(dev, "fail to enable vpcie0v9 regulator\n");
-			goto err_disable_1v8;
-		}
-	}
-
-	return 0;
-
-err_disable_1v8:
-	if (!IS_ERR(rockchip->vpcie1v8))
-		regulator_disable(rockchip->vpcie1v8);
-err_disable_3v3:
-	if (!IS_ERR(rockchip->vpcie3v3))
-		regulator_disable(rockchip->vpcie3v3);
-err_disable_12v:
-	if (!IS_ERR(rockchip->vpcie12v))
-		regulator_disable(rockchip->vpcie12v);
-err_out:
-	return err;
-}
-
-static void rockchip_pcie_enable_interrupts(struct rockchip_pcie *rockchip)
-{
-	rockchip_pcie_write(rockchip, (PCIE_CLIENT_INT_CLI << 16) &
-			    (~PCIE_CLIENT_INT_CLI), PCIE_CLIENT_INT_MASK);
-	rockchip_pcie_write(rockchip, (u32)(~PCIE_CORE_INT),
-			    PCIE_CORE_INT_MASK);
-
-	rockchip_pcie_enable_bw_int(rockchip);
-}
-
-static int rockchip_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
-				  irq_hw_number_t hwirq)
-{
-	irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_simple_irq);
-	irq_set_chip_data(irq, domain->host_data);
-
-	return 0;
-}
-
-static const struct irq_domain_ops intx_domain_ops = {
-	.map = rockchip_pcie_intx_map,
-};
-
-static int rockchip_pcie_init_irq_domain(struct rockchip_pcie *rockchip)
-{
-	struct device *dev = rockchip->dev;
-	struct device_node *intc = of_get_next_child(dev->of_node, NULL);
-
-	if (!intc) {
-		dev_err(dev, "missing child interrupt-controller node\n");
-		return -EINVAL;
-	}
-
-	rockchip->irq_domain = irq_domain_add_linear(intc, PCI_NUM_INTX,
-						    &intx_domain_ops, rockchip);
-	if (!rockchip->irq_domain) {
-		dev_err(dev, "failed to get a INTx IRQ domain\n");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static int rockchip_pcie_prog_ob_atu(struct rockchip_pcie *rockchip,
-				     int region_no, int type, u8 num_pass_bits,
-				     u32 lower_addr, u32 upper_addr)
-{
-	u32 ob_addr_0;
-	u32 ob_addr_1;
-	u32 ob_desc_0;
-	u32 aw_offset;
-
-	if (region_no >= MAX_AXI_WRAPPER_REGION_NUM)
-		return -EINVAL;
-	if (num_pass_bits + 1 < 8)
-		return -EINVAL;
-	if (num_pass_bits > 63)
-		return -EINVAL;
-	if (region_no == 0) {
-		if (AXI_REGION_0_SIZE < (2ULL << num_pass_bits))
-			return -EINVAL;
-	}
-	if (region_no != 0) {
-		if (AXI_REGION_SIZE < (2ULL << num_pass_bits))
-			return -EINVAL;
-	}
-
-	aw_offset = (region_no << OB_REG_SIZE_SHIFT);
-
-	ob_addr_0 = num_pass_bits & PCIE_CORE_OB_REGION_ADDR0_NUM_BITS;
-	ob_addr_0 |= lower_addr & PCIE_CORE_OB_REGION_ADDR0_LO_ADDR;
-	ob_addr_1 = upper_addr;
-	ob_desc_0 = (1 << 23 | type);
-
-	rockchip_pcie_write(rockchip, ob_addr_0,
-			    PCIE_CORE_OB_REGION_ADDR0 + aw_offset);
-	rockchip_pcie_write(rockchip, ob_addr_1,
-			    PCIE_CORE_OB_REGION_ADDR1 + aw_offset);
-	rockchip_pcie_write(rockchip, ob_desc_0,
-			    PCIE_CORE_OB_REGION_DESC0 + aw_offset);
-	rockchip_pcie_write(rockchip, 0,
-			    PCIE_CORE_OB_REGION_DESC1 + aw_offset);
-
-	return 0;
-}
-
-static int rockchip_pcie_prog_ib_atu(struct rockchip_pcie *rockchip,
-				     int region_no, u8 num_pass_bits,
-				     u32 lower_addr, u32 upper_addr)
-{
-	u32 ib_addr_0;
-	u32 ib_addr_1;
-	u32 aw_offset;
-
-	if (region_no > MAX_AXI_IB_ROOTPORT_REGION_NUM)
-		return -EINVAL;
-	if (num_pass_bits + 1 < MIN_AXI_ADDR_BITS_PASSED)
-		return -EINVAL;
-	if (num_pass_bits > 63)
-		return -EINVAL;
-
-	aw_offset = (region_no << IB_ROOT_PORT_REG_SIZE_SHIFT);
-
-	ib_addr_0 = num_pass_bits & PCIE_CORE_IB_REGION_ADDR0_NUM_BITS;
-	ib_addr_0 |= (lower_addr << 8) & PCIE_CORE_IB_REGION_ADDR0_LO_ADDR;
-	ib_addr_1 = upper_addr;
-
-	rockchip_pcie_write(rockchip, ib_addr_0, PCIE_RP_IB_ADDR0 + aw_offset);
-	rockchip_pcie_write(rockchip, ib_addr_1, PCIE_RP_IB_ADDR1 + aw_offset);
-
-	return 0;
-}
-
-static int rockchip_pcie_cfg_atu(struct rockchip_pcie *rockchip)
-{
-	struct device *dev = rockchip->dev;
-	int offset;
-	int err;
-	int reg_no;
-
-	rockchip_pcie_cfg_configuration_accesses(rockchip,
-						 AXI_WRAPPER_TYPE0_CFG);
-
-	for (reg_no = 0; reg_no < (rockchip->mem_size >> 20); reg_no++) {
-		err = rockchip_pcie_prog_ob_atu(rockchip, reg_no + 1,
-						AXI_WRAPPER_MEM_WRITE,
-						20 - 1,
-						rockchip->mem_bus_addr +
-						(reg_no << 20),
-						0);
-		if (err) {
-			dev_err(dev, "program RC mem outbound ATU failed\n");
-			return err;
-		}
-	}
-
-	err = rockchip_pcie_prog_ib_atu(rockchip, 2, 32 - 1, 0x0, 0);
-	if (err) {
-		dev_err(dev, "program RC mem inbound ATU failed\n");
-		return err;
-	}
-
-	offset = rockchip->mem_size >> 20;
-	for (reg_no = 0; reg_no < (rockchip->io_size >> 20); reg_no++) {
-		err = rockchip_pcie_prog_ob_atu(rockchip,
-						reg_no + 1 + offset,
-						AXI_WRAPPER_IO_WRITE,
-						20 - 1,
-						rockchip->io_bus_addr +
-						(reg_no << 20),
-						0);
-		if (err) {
-			dev_err(dev, "program RC io outbound ATU failed\n");
-			return err;
-		}
-	}
-
-	/* assign message regions */
-	rockchip_pcie_prog_ob_atu(rockchip, reg_no + 1 + offset,
-				  AXI_WRAPPER_NOR_MSG,
-				  20 - 1, 0, 0);
-
-	rockchip->msg_bus_addr = rockchip->mem_bus_addr +
-					((reg_no + offset) << 20);
-	return err;
-}
-
-static int rockchip_pcie_wait_l2(struct rockchip_pcie *rockchip)
+void rockchip_pcie_deinit_phys(struct rockchip_pcie *rockchip)
 {
-	u32 value;
-	int err;
-
-	/* send PME_TURN_OFF message */
-	writel(0x0, rockchip->msg_region + PCIE_RC_SEND_PME_OFF);
+	int i;
 
-	/* read LTSSM and wait for falling into L2 link state */
-	err = readl_poll_timeout(rockchip->apb_base + PCIE_CLIENT_DEBUG_OUT_0,
-				 value, PCIE_LINK_IS_L2(value), 20,
-				 jiffies_to_usecs(5 * HZ));
-	if (err) {
-		dev_err(rockchip->dev, "PCIe link enter L2 timeout!\n");
-		return err;
+	for (i = 0; i < MAX_LANE_NUM; i++) {
+		/* inactive lanes are already powered off */
+		if (rockchip->lanes_map & BIT(i))
+			phy_power_off(rockchip->phys[i]);
+		phy_exit(rockchip->phys[i]);
 	}
-
-	return 0;
 }
+EXPORT_SYMBOL_GPL(rockchip_pcie_deinit_phys);
 
-static int rockchip_pcie_enable_clocks(struct rockchip_pcie *rockchip)
+int rockchip_pcie_enable_clocks(struct rockchip_pcie *rockchip)
 {
 	struct device *dev = rockchip->dev;
 	int err;
@@ -1432,8 +110,9 @@ static int rockchip_pcie_enable_clocks(struct rockchip_pcie *rockchip)
 	clk_disable_unprepare(rockchip->aclk_pcie);
 	return err;
 }
+EXPORT_SYMBOL_GPL(rockchip_pcie_enable_clocks);
 
-static void rockchip_pcie_disable_clocks(void *data)
+void rockchip_pcie_disable_clocks(void *data)
 {
 	struct rockchip_pcie *rockchip = data;
 
@@ -1442,267 +121,25 @@ static void rockchip_pcie_disable_clocks(void *data)
 	clk_disable_unprepare(rockchip->aclk_perf_pcie);
 	clk_disable_unprepare(rockchip->aclk_pcie);
 }
+EXPORT_SYMBOL_GPL(rockchip_pcie_disable_clocks);
 
-static int __maybe_unused rockchip_pcie_suspend_noirq(struct device *dev)
-{
-	struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
-	int ret;
-
-	/* disable core and cli int since we don't need to ack PME_ACK */
-	rockchip_pcie_write(rockchip, (PCIE_CLIENT_INT_CLI << 16) |
-			    PCIE_CLIENT_INT_CLI, PCIE_CLIENT_INT_MASK);
-	rockchip_pcie_write(rockchip, (u32)PCIE_CORE_INT, PCIE_CORE_INT_MASK);
-
-	ret = rockchip_pcie_wait_l2(rockchip);
-	if (ret) {
-		rockchip_pcie_enable_interrupts(rockchip);
-		return ret;
-	}
-
-	rockchip_pcie_deinit_phys(rockchip);
-
-	rockchip_pcie_disable_clocks(rockchip);
-
-	if (!IS_ERR(rockchip->vpcie0v9))
-		regulator_disable(rockchip->vpcie0v9);
-
-	return ret;
-}
-
-static int __maybe_unused rockchip_pcie_resume_noirq(struct device *dev)
-{
-	struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
-	int err;
-
-	if (!IS_ERR(rockchip->vpcie0v9)) {
-		err = regulator_enable(rockchip->vpcie0v9);
-		if (err) {
-			dev_err(dev, "fail to enable vpcie0v9 regulator\n");
-			return err;
-		}
-	}
-
-	err = rockchip_pcie_enable_clocks(rockchip);
-	if (err)
-		goto err_disable_0v9;
-
-	err = rockchip_pcie_init_port(rockchip);
-	if (err)
-		goto err_pcie_resume;
-
-	err = rockchip_pcie_cfg_atu(rockchip);
-	if (err)
-		goto err_err_deinit_port;
-
-	/* Need this to enter L1 again */
-	rockchip_pcie_update_txcredit_mui(rockchip);
-	rockchip_pcie_enable_interrupts(rockchip);
-
-	return 0;
-
-err_err_deinit_port:
-	rockchip_pcie_deinit_phys(rockchip);
-err_pcie_resume:
-	rockchip_pcie_disable_clocks(rockchip);
-err_disable_0v9:
-	if (!IS_ERR(rockchip->vpcie0v9))
-		regulator_disable(rockchip->vpcie0v9);
-	return err;
-}
-
-static int rockchip_pcie_probe(struct platform_device *pdev)
-{
-	struct rockchip_pcie *rockchip;
-	struct device *dev = &pdev->dev;
-	struct pci_bus *bus, *child;
-	struct pci_host_bridge *bridge;
-	struct resource_entry *win;
-	resource_size_t io_base;
-	struct resource	*mem;
-	struct resource	*io;
-	int err;
-
-	LIST_HEAD(res);
-
-	if (!dev->of_node)
-		return -ENODEV;
-
-	bridge = devm_pci_alloc_host_bridge(dev, sizeof(*rockchip));
-	if (!bridge)
-		return -ENOMEM;
-
-	rockchip = pci_host_bridge_priv(bridge);
-
-	platform_set_drvdata(pdev, rockchip);
-	rockchip->dev = dev;
-
-	err = rockchip_pcie_parse_dt(rockchip);
-	if (err)
-		return err;
-
-	err = rockchip_pcie_enable_clocks(rockchip);
-	if (err)
-		return err;
-
-	err = rockchip_pcie_set_vpcie(rockchip);
-	if (err) {
-		dev_err(dev, "failed to set vpcie regulator\n");
-		goto err_set_vpcie;
-	}
-
-	err = rockchip_pcie_init_port(rockchip);
-	if (err)
-		goto err_vpcie;
-
-	rockchip_pcie_enable_interrupts(rockchip);
-
-	err = rockchip_pcie_init_irq_domain(rockchip);
-	if (err < 0)
-		goto err_deinit_port;
-
-	err = of_pci_get_host_bridge_resources(dev->of_node, 0, 0xff,
-					       &res, &io_base);
-	if (err)
-		goto err_remove_irq_domain;
-
-	err = devm_request_pci_bus_resources(dev, &res);
-	if (err)
-		goto err_free_res;
-
-	/* Get the I/O and memory ranges from DT */
-	resource_list_for_each_entry(win, &res) {
-		switch (resource_type(win->res)) {
-		case IORESOURCE_IO:
-			io = win->res;
-			io->name = "I/O";
-			rockchip->io_size = resource_size(io);
-			rockchip->io_bus_addr = io->start - win->offset;
-			err = pci_remap_iospace(io, io_base);
-			if (err) {
-				dev_warn(dev, "error %d: failed to map resource %pR\n",
-					 err, io);
-				continue;
-			}
-			rockchip->io = io;
-			break;
-		case IORESOURCE_MEM:
-			mem = win->res;
-			mem->name = "MEM";
-			rockchip->mem_size = resource_size(mem);
-			rockchip->mem_bus_addr = mem->start - win->offset;
-			break;
-		case IORESOURCE_BUS:
-			rockchip->root_bus_nr = win->res->start;
-			break;
-		default:
-			continue;
-		}
-	}
-
-	err = rockchip_pcie_cfg_atu(rockchip);
-	if (err)
-		goto err_unmap_iospace;
-
-	rockchip->msg_region = devm_ioremap(dev, rockchip->msg_bus_addr, SZ_1M);
-	if (!rockchip->msg_region) {
-		err = -ENOMEM;
-		goto err_unmap_iospace;
-	}
-
-	list_splice_init(&res, &bridge->windows);
-	bridge->dev.parent = dev;
-	bridge->sysdata = rockchip;
-	bridge->busnr = 0;
-	bridge->ops = &rockchip_pcie_ops;
-	bridge->map_irq = of_irq_parse_and_map_pci;
-	bridge->swizzle_irq = pci_common_swizzle;
-
-	err = pci_scan_root_bus_bridge(bridge);
-	if (err < 0)
-		goto err_unmap_iospace;
-
-	bus = bridge->bus;
-
-	rockchip->root_bus = bus;
-
-	pci_bus_size_bridges(bus);
-	pci_bus_assign_resources(bus);
-	list_for_each_entry(child, &bus->children, node)
-		pcie_bus_configure_settings(child);
-
-	pci_bus_add_devices(bus);
-	return 0;
-
-err_unmap_iospace:
-	pci_unmap_iospace(rockchip->io);
-err_free_res:
-	pci_free_resource_list(&res);
-err_remove_irq_domain:
-	irq_domain_remove(rockchip->irq_domain);
-err_deinit_port:
-	rockchip_pcie_deinit_phys(rockchip);
-err_vpcie:
-	if (!IS_ERR(rockchip->vpcie12v))
-		regulator_disable(rockchip->vpcie12v);
-	if (!IS_ERR(rockchip->vpcie3v3))
-		regulator_disable(rockchip->vpcie3v3);
-	if (!IS_ERR(rockchip->vpcie1v8))
-		regulator_disable(rockchip->vpcie1v8);
-	if (!IS_ERR(rockchip->vpcie0v9))
-		regulator_disable(rockchip->vpcie0v9);
-err_set_vpcie:
-	rockchip_pcie_disable_clocks(rockchip);
-	return err;
-}
-
-static int rockchip_pcie_remove(struct platform_device *pdev)
+void rockchip_pcie_cfg_configuration_accesses(
+		struct rockchip_pcie *rockchip, u32 type)
 {
-	struct device *dev = &pdev->dev;
-	struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
-
-	pci_stop_root_bus(rockchip->root_bus);
-	pci_remove_root_bus(rockchip->root_bus);
-	pci_unmap_iospace(rockchip->io);
-	irq_domain_remove(rockchip->irq_domain);
-
-	rockchip_pcie_deinit_phys(rockchip);
-
-	rockchip_pcie_disable_clocks(rockchip);
+	u32 ob_desc_0;
 
-	if (!IS_ERR(rockchip->vpcie12v))
-		regulator_disable(rockchip->vpcie12v);
-	if (!IS_ERR(rockchip->vpcie3v3))
-		regulator_disable(rockchip->vpcie3v3);
-	if (!IS_ERR(rockchip->vpcie1v8))
-		regulator_disable(rockchip->vpcie1v8);
-	if (!IS_ERR(rockchip->vpcie0v9))
-		regulator_disable(rockchip->vpcie0v9);
+	/* Configuration Accesses for region 0 */
+	rockchip_pcie_write(rockchip, 0x0, PCIE_RC_BAR_CONF);
 
-	return 0;
+	rockchip_pcie_write(rockchip,
+			    (RC_REGION_0_ADDR_TRANS_L + RC_REGION_0_PASS_BITS),
+			    PCIE_CORE_OB_REGION_ADDR0);
+	rockchip_pcie_write(rockchip, RC_REGION_0_ADDR_TRANS_H,
+			    PCIE_CORE_OB_REGION_ADDR1);
+	ob_desc_0 = rockchip_pcie_read(rockchip, PCIE_CORE_OB_REGION_DESC0);
+	ob_desc_0 &= ~(RC_REGION_0_TYPE_MASK);
+	ob_desc_0 |= (type | (0x1 << 23));
+	rockchip_pcie_write(rockchip, ob_desc_0, PCIE_CORE_OB_REGION_DESC0);
+	rockchip_pcie_write(rockchip, 0x0, PCIE_CORE_OB_REGION_DESC1);
 }
-
-static const struct dev_pm_ops rockchip_pcie_pm_ops = {
-	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(rockchip_pcie_suspend_noirq,
-				      rockchip_pcie_resume_noirq)
-};
-
-static const struct of_device_id rockchip_pcie_of_match[] = {
-	{ .compatible = "rockchip,rk3399-pcie", },
-	{}
-};
-MODULE_DEVICE_TABLE(of, rockchip_pcie_of_match);
-
-static struct platform_driver rockchip_pcie_driver = {
-	.driver = {
-		.name = "rockchip-pcie",
-		.of_match_table = rockchip_pcie_of_match,
-		.pm = &rockchip_pcie_pm_ops,
-	},
-	.probe = rockchip_pcie_probe,
-	.remove = rockchip_pcie_remove,
-};
-module_platform_driver(rockchip_pcie_driver);
-
-MODULE_AUTHOR("Rockchip Inc");
-MODULE_DESCRIPTION("Rockchip AXI PCIe driver");
-MODULE_LICENSE("GPL v2");
+EXPORT_SYMBOL_GPL(rockchip_pcie_cfg_configuration_accesses);
diff --git a/drivers/pci/host/pcie-rockchip.h b/drivers/pci/host/pcie-rockchip.h
new file mode 100644
index 0000000..d27941e
--- /dev/null
+++ b/drivers/pci/host/pcie-rockchip.h
@@ -0,0 +1,245 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Rockchip AXI PCIe controller driver
+ *
+ * Copyright (c) 2018 Rockchip, Inc.
+ *
+ * Author: Shawn Lin <shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
+ *
+ */
+
+#ifndef _PCIE_ROCKCHIP_H
+#define _PCIE_ROCKCHIP_H
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+
+/*
+ * The upper 16 bits of PCIE_CLIENT_CONFIG are a write mask for the lower 16
+ * bits.  This allows atomic updates of the register without locking.
+ */
+#define HIWORD_UPDATE(mask, val)	(((mask) << 16) | (val))
+#define HIWORD_UPDATE_BIT(val)		HIWORD_UPDATE(val, val)
+
+#define ENCODE_LANES(x)			((((x) >> 1) & 3) << 4)
+#define MAX_LANE_NUM			4
+
+#define PCIE_CLIENT_BASE		0x0
+#define PCIE_CLIENT_CONFIG		(PCIE_CLIENT_BASE + 0x00)
+#define   PCIE_CLIENT_CONF_ENABLE	  HIWORD_UPDATE_BIT(0x0001)
+#define   PCIE_CLIENT_LINK_TRAIN_ENABLE	  HIWORD_UPDATE_BIT(0x0002)
+#define   PCIE_CLIENT_ARI_ENABLE	  HIWORD_UPDATE_BIT(0x0008)
+#define   PCIE_CLIENT_CONF_LANE_NUM(x)	  HIWORD_UPDATE(0x0030, ENCODE_LANES(x))
+#define   PCIE_CLIENT_MODE_RC		  HIWORD_UPDATE_BIT(0x0040)
+#define   PCIE_CLIENT_GEN_SEL_1		  HIWORD_UPDATE(0x0080, 0)
+#define   PCIE_CLIENT_GEN_SEL_2		  HIWORD_UPDATE_BIT(0x0080)
+#define PCIE_CLIENT_DEBUG_OUT_0		(PCIE_CLIENT_BASE + 0x3c)
+#define   PCIE_CLIENT_DEBUG_LTSSM_MASK		GENMASK(5, 0)
+#define   PCIE_CLIENT_DEBUG_LTSSM_L1		0x18
+#define   PCIE_CLIENT_DEBUG_LTSSM_L2		0x19
+#define PCIE_CLIENT_BASIC_STATUS1	(PCIE_CLIENT_BASE + 0x48)
+#define   PCIE_CLIENT_LINK_STATUS_UP		0x00300000
+#define   PCIE_CLIENT_LINK_STATUS_MASK		0x00300000
+#define PCIE_CLIENT_INT_MASK		(PCIE_CLIENT_BASE + 0x4c)
+#define PCIE_CLIENT_INT_STATUS		(PCIE_CLIENT_BASE + 0x50)
+#define   PCIE_CLIENT_INTR_MASK			GENMASK(8, 5)
+#define   PCIE_CLIENT_INTR_SHIFT		5
+#define   PCIE_CLIENT_INT_LEGACY_DONE		BIT(15)
+#define   PCIE_CLIENT_INT_MSG			BIT(14)
+#define   PCIE_CLIENT_INT_HOT_RST		BIT(13)
+#define   PCIE_CLIENT_INT_DPA			BIT(12)
+#define   PCIE_CLIENT_INT_FATAL_ERR		BIT(11)
+#define   PCIE_CLIENT_INT_NFATAL_ERR		BIT(10)
+#define   PCIE_CLIENT_INT_CORR_ERR		BIT(9)
+#define   PCIE_CLIENT_INT_INTD			BIT(8)
+#define   PCIE_CLIENT_INT_INTC			BIT(7)
+#define   PCIE_CLIENT_INT_INTB			BIT(6)
+#define   PCIE_CLIENT_INT_INTA			BIT(5)
+#define   PCIE_CLIENT_INT_LOCAL			BIT(4)
+#define   PCIE_CLIENT_INT_UDMA			BIT(3)
+#define   PCIE_CLIENT_INT_PHY			BIT(2)
+#define   PCIE_CLIENT_INT_HOT_PLUG		BIT(1)
+#define   PCIE_CLIENT_INT_PWR_STCG		BIT(0)
+
+#define PCIE_CLIENT_INT_LEGACY \
+	(PCIE_CLIENT_INT_INTA | PCIE_CLIENT_INT_INTB | \
+	PCIE_CLIENT_INT_INTC | PCIE_CLIENT_INT_INTD)
+
+#define PCIE_CLIENT_INT_CLI \
+	(PCIE_CLIENT_INT_CORR_ERR | PCIE_CLIENT_INT_NFATAL_ERR | \
+	PCIE_CLIENT_INT_FATAL_ERR | PCIE_CLIENT_INT_DPA | \
+	PCIE_CLIENT_INT_HOT_RST | PCIE_CLIENT_INT_MSG | \
+	PCIE_CLIENT_INT_LEGACY_DONE | PCIE_CLIENT_INT_LEGACY | \
+	PCIE_CLIENT_INT_PHY)
+
+#define PCIE_CORE_CTRL_MGMT_BASE	0x900000
+#define PCIE_CORE_CTRL			(PCIE_CORE_CTRL_MGMT_BASE + 0x000)
+#define   PCIE_CORE_PL_CONF_SPEED_5G		0x00000008
+#define   PCIE_CORE_PL_CONF_SPEED_MASK		0x00000018
+#define   PCIE_CORE_PL_CONF_LANE_MASK		0x00000006
+#define   PCIE_CORE_PL_CONF_LANE_SHIFT		1
+#define PCIE_CORE_CTRL_PLC1		(PCIE_CORE_CTRL_MGMT_BASE + 0x004)
+#define   PCIE_CORE_CTRL_PLC1_FTS_MASK		GENMASK(23, 8)
+#define   PCIE_CORE_CTRL_PLC1_FTS_SHIFT		8
+#define   PCIE_CORE_CTRL_PLC1_FTS_CNT		0xffff
+#define PCIE_CORE_TXCREDIT_CFG1		(PCIE_CORE_CTRL_MGMT_BASE + 0x020)
+#define   PCIE_CORE_TXCREDIT_CFG1_MUI_MASK	0xFFFF0000
+#define   PCIE_CORE_TXCREDIT_CFG1_MUI_SHIFT	16
+#define   PCIE_CORE_TXCREDIT_CFG1_MUI_ENCODE(x) \
+		(((x) >> 3) << PCIE_CORE_TXCREDIT_CFG1_MUI_SHIFT)
+#define PCIE_CORE_LANE_MAP             (PCIE_CORE_CTRL_MGMT_BASE + 0x200)
+#define   PCIE_CORE_LANE_MAP_MASK              0x0000000f
+#define   PCIE_CORE_LANE_MAP_REVERSE           BIT(16)
+#define PCIE_CORE_INT_STATUS		(PCIE_CORE_CTRL_MGMT_BASE + 0x20c)
+#define   PCIE_CORE_INT_PRFPE			BIT(0)
+#define   PCIE_CORE_INT_CRFPE			BIT(1)
+#define   PCIE_CORE_INT_RRPE			BIT(2)
+#define   PCIE_CORE_INT_PRFO			BIT(3)
+#define   PCIE_CORE_INT_CRFO			BIT(4)
+#define   PCIE_CORE_INT_RT			BIT(5)
+#define   PCIE_CORE_INT_RTR			BIT(6)
+#define   PCIE_CORE_INT_PE			BIT(7)
+#define   PCIE_CORE_INT_MTR			BIT(8)
+#define   PCIE_CORE_INT_UCR			BIT(9)
+#define   PCIE_CORE_INT_FCE			BIT(10)
+#define   PCIE_CORE_INT_CT			BIT(11)
+#define   PCIE_CORE_INT_UTC			BIT(18)
+#define   PCIE_CORE_INT_MMVC			BIT(19)
+#define PCIE_CORE_CONFIG_VENDOR		(PCIE_CORE_CTRL_MGMT_BASE + 0x44)
+#define PCIE_CORE_INT_MASK		(PCIE_CORE_CTRL_MGMT_BASE + 0x210)
+#define PCIE_RC_BAR_CONF		(PCIE_CORE_CTRL_MGMT_BASE + 0x300)
+
+#define PCIE_CORE_INT \
+		(PCIE_CORE_INT_PRFPE | PCIE_CORE_INT_CRFPE | \
+		 PCIE_CORE_INT_RRPE | PCIE_CORE_INT_CRFO | \
+		 PCIE_CORE_INT_RT | PCIE_CORE_INT_RTR | \
+		 PCIE_CORE_INT_PE | PCIE_CORE_INT_MTR | \
+		 PCIE_CORE_INT_UCR | PCIE_CORE_INT_FCE | \
+		 PCIE_CORE_INT_CT | PCIE_CORE_INT_UTC | \
+		 PCIE_CORE_INT_MMVC)
+
+#define PCIE_RC_CONFIG_NORMAL_BASE	0x800000
+#define PCIE_RC_CONFIG_BASE		0xa00000
+#define PCIE_RC_CONFIG_RID_CCR		(PCIE_RC_CONFIG_BASE + 0x08)
+#define   PCIE_RC_CONFIG_SCC_SHIFT		16
+#define PCIE_RC_CONFIG_DCR		(PCIE_RC_CONFIG_BASE + 0xc4)
+#define   PCIE_RC_CONFIG_DCR_CSPL_SHIFT		18
+#define   PCIE_RC_CONFIG_DCR_CSPL_LIMIT		0xff
+#define   PCIE_RC_CONFIG_DCR_CPLS_SHIFT		26
+#define PCIE_RC_CONFIG_DCSR		(PCIE_RC_CONFIG_BASE + 0xc8)
+#define   PCIE_RC_CONFIG_DCSR_MPS_MASK		GENMASK(7, 5)
+#define   PCIE_RC_CONFIG_DCSR_MPS_256		(0x1 << 5)
+#define PCIE_RC_CONFIG_LINK_CAP		(PCIE_RC_CONFIG_BASE + 0xcc)
+#define   PCIE_RC_CONFIG_LINK_CAP_L0S		BIT(10)
+#define PCIE_RC_CONFIG_LCS		(PCIE_RC_CONFIG_BASE + 0xd0)
+#define PCIE_RC_CONFIG_L1_SUBSTATE_CTRL2 (PCIE_RC_CONFIG_BASE + 0x90c)
+#define PCIE_RC_CONFIG_THP_CAP		(PCIE_RC_CONFIG_BASE + 0x274)
+#define   PCIE_RC_CONFIG_THP_CAP_NEXT_MASK	GENMASK(31, 20)
+
+#define PCIE_CORE_AXI_CONF_BASE		0xc00000
+#define PCIE_CORE_OB_REGION_ADDR0	(PCIE_CORE_AXI_CONF_BASE + 0x0)
+#define   PCIE_CORE_OB_REGION_ADDR0_NUM_BITS	0x3f
+#define   PCIE_CORE_OB_REGION_ADDR0_LO_ADDR	0xffffff00
+#define PCIE_CORE_OB_REGION_ADDR1	(PCIE_CORE_AXI_CONF_BASE + 0x4)
+#define PCIE_CORE_OB_REGION_DESC0	(PCIE_CORE_AXI_CONF_BASE + 0x8)
+#define PCIE_CORE_OB_REGION_DESC1	(PCIE_CORE_AXI_CONF_BASE + 0xc)
+
+#define PCIE_CORE_AXI_INBOUND_BASE	0xc00800
+#define PCIE_RP_IB_ADDR0		(PCIE_CORE_AXI_INBOUND_BASE + 0x0)
+#define   PCIE_CORE_IB_REGION_ADDR0_NUM_BITS	0x3f
+#define   PCIE_CORE_IB_REGION_ADDR0_LO_ADDR	0xffffff00
+#define PCIE_RP_IB_ADDR1		(PCIE_CORE_AXI_INBOUND_BASE + 0x4)
+
+/* Size of one AXI Region (not Region 0) */
+#define AXI_REGION_SIZE				BIT(20)
+/* Size of Region 0, equal to sum of sizes of other regions */
+#define AXI_REGION_0_SIZE			(32 * (0x1 << 20))
+#define OB_REG_SIZE_SHIFT			5
+#define IB_ROOT_PORT_REG_SIZE_SHIFT		3
+#define AXI_WRAPPER_IO_WRITE			0x6
+#define AXI_WRAPPER_MEM_WRITE			0x2
+#define AXI_WRAPPER_TYPE0_CFG			0xa
+#define AXI_WRAPPER_TYPE1_CFG			0xb
+#define AXI_WRAPPER_NOR_MSG			0xc
+
+#define MAX_AXI_IB_ROOTPORT_REGION_NUM		3
+#define MIN_AXI_ADDR_BITS_PASSED		8
+#define PCIE_RC_SEND_PME_OFF			0x11960
+#define ROCKCHIP_VENDOR_ID			0x1d87
+#define PCIE_ECAM_BUS(x)			(((x) & 0xff) << 20)
+#define PCIE_ECAM_DEV(x)			(((x) & 0x1f) << 15)
+#define PCIE_ECAM_FUNC(x)			(((x) & 0x7) << 12)
+#define PCIE_ECAM_REG(x)			(((x) & 0xfff) << 0)
+#define PCIE_ECAM_ADDR(bus, dev, func, reg) \
+	  (PCIE_ECAM_BUS(bus) | PCIE_ECAM_DEV(dev) | \
+	   PCIE_ECAM_FUNC(func) | PCIE_ECAM_REG(reg))
+#define PCIE_LINK_IS_L2(x) \
+	(((x) & PCIE_CLIENT_DEBUG_LTSSM_MASK) == PCIE_CLIENT_DEBUG_LTSSM_L2)
+#define PCIE_LINK_UP(x) \
+	(((x) & PCIE_CLIENT_LINK_STATUS_MASK) == PCIE_CLIENT_LINK_STATUS_UP)
+#define PCIE_LINK_IS_GEN2(x) \
+	(((x) & PCIE_CORE_PL_CONF_SPEED_MASK) == PCIE_CORE_PL_CONF_SPEED_5G)
+
+#define RC_REGION_0_ADDR_TRANS_H		0x00000000
+#define RC_REGION_0_ADDR_TRANS_L		0x00000000
+#define RC_REGION_0_PASS_BITS			(25 - 1)
+#define RC_REGION_0_TYPE_MASK			GENMASK(3, 0)
+#define MAX_AXI_WRAPPER_REGION_NUM		33
+
+struct rockchip_pcie {
+	void	__iomem *reg_base;		/* DT axi-base */
+	void	__iomem *apb_base;		/* DT apb-base */
+	bool    legacy_phy;
+	struct  phy *phys[MAX_LANE_NUM];
+	struct	reset_control *core_rst;
+	struct	reset_control *mgmt_rst;
+	struct	reset_control *mgmt_sticky_rst;
+	struct	reset_control *pipe_rst;
+	struct	reset_control *pm_rst;
+	struct	reset_control *aclk_rst;
+	struct	reset_control *pclk_rst;
+	struct	clk *aclk_pcie;
+	struct	clk *aclk_perf_pcie;
+	struct	clk *hclk_pcie;
+	struct	clk *clk_pcie_pm;
+	struct	regulator *vpcie12v; /* 12V power supply */
+	struct	regulator *vpcie3v3; /* 3.3V power supply */
+	struct	regulator *vpcie1v8; /* 1.8V power supply */
+	struct	regulator *vpcie0v9; /* 0.9V power supply */
+	struct	gpio_desc *ep_gpio;
+	u32	lanes;
+	u8      lanes_map;
+	u8	root_bus_nr;
+	int	link_gen;
+	struct	device *dev;
+	struct	irq_domain *irq_domain;
+	int     offset;
+	struct pci_bus *root_bus;
+	struct resource *io;
+	phys_addr_t io_bus_addr;
+	u32     io_size;
+	void    __iomem *msg_region;
+	u32     mem_size;
+	phys_addr_t msg_bus_addr;
+	phys_addr_t mem_bus_addr;
+};
+
+static u32 rockchip_pcie_read(struct rockchip_pcie *rockchip, u32 reg)
+{
+	return readl(rockchip->apb_base + reg);
+}
+
+static void rockchip_pcie_write(struct rockchip_pcie *rockchip, u32 val,
+				u32 reg)
+{
+	writel(val, rockchip->apb_base + reg);
+}
+
+int rockchip_pcie_get_phys(struct rockchip_pcie *rockchip);
+void rockchip_pcie_deinit_phys(struct rockchip_pcie *rockchip);
+int rockchip_pcie_enable_clocks(struct rockchip_pcie *rockchip);
+void rockchip_pcie_disable_clocks(void *data);
+void rockchip_pcie_cfg_configuration_accesses(
+		struct rockchip_pcie *rockchip, u32 type);
+
+#endif /* _PCIE_ROCKCHIP_H */
-- 
1.9.1