ipq806x: add pcie support to ipq806x based platforms

This change adds PCIe support to IPQ806x based platforms. The driver is
actually cherry-picked from the following LKML thread:
*https://lwn.net/Articles/643086/ (patches 110-111)

We also add here an additional fix to support multiple PCI controllers
on the same platform (patch 112), and to patch the ap148 & dbs149 DTS
files (patch 113).

Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>

SVN-Revision: 45663

1 files changed, 753 insertions, 0 deletions

diff --git a/target/linux/ipq806x/patches-3.18/111-PCI-qcom-Add-Qualcomm-PCIe-controller-driver.patch b/target/linux/ipq806x/patches-3.18/111-PCI-qcom-Add-Qualcomm-PCIe-controller-driver.patch
new file mode 100644
index 0000000..a0c9c7c
--- /dev/null
+++ b/target/linux/ipq806x/patches-3.18/111-PCI-qcom-Add-Qualcomm-PCIe-controller-driver.patch
@@ -0,0 +1,753 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v2,4/5] PCI: qcom: Add Qualcomm PCIe controller driver
+From: Stanimir Varbanov <svarbanov@mm-sol.com>
+X-Patchwork-Id: 6326161
+Message-Id: <1430743338-10441-5-git-send-email-svarbanov@mm-sol.com>
+To: Rob Herring <robh+dt@kernel.org>, Kumar Gala <galak@codeaurora.org>,
+	Mark Rutland <mark.rutland@arm.com>,
+	Grant Likely <grant.likely@linaro.org>,
+	Bjorn Helgaas <bhelgaas@google.com>,
+	Kishon Vijay Abraham I <kishon@ti.com>,
+	Russell King <linux@arm.linux.org.uk>, Arnd Bergmann <arnd@arndb.de>
+Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
+	linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
+	linux-pci@vger.kernel.org, Mathieu Olivari <mathieu@codeaurora.org>,
+	Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
+	Stanimir Varbanov <svarbanov@mm-sol.com>
+Date: Mon,  4 May 2015 15:42:17 +0300
+
+The PCIe driver reuse the Designware common code for host
+and MSI initialization, and also program the Qualcomm
+application specific registers.
+
+Signed-off-by: Stanimir Varbanov <svarbanov@mm-sol.com>
+
+---
+MAINTAINERS                  |    7 +
+ drivers/pci/host/Kconfig     |    9 +
+ drivers/pci/host/Makefile    |    1 +
+ drivers/pci/host/pcie-qcom.c |  677 ++++++++++++++++++++++++++++++++++++++++++
+ 4 files changed, 694 insertions(+), 0 deletions(-)
+ create mode 100644 drivers/pci/host/pcie-qcom.c
+
+--- a/MAINTAINERS
++++ b/MAINTAINERS
+@@ -7127,6 +7127,13 @@ L:	linux-pci@vger.kernel.org
+ S:	Maintained
+ F:	drivers/pci/host/*spear*
+ 
++PCIE DRIVER FOR QUALCOMM MSM
++M:	Stanimir Varbanov <svarbanov@mm-sol.com>
++L:	linux-pci@vger.kernel.org
++L:	linux-arm-msm@vger.kernel.org
++S:	Maintained
++F:	drivers/pci/host/*qcom*
++
+ PCMCIA SUBSYSTEM
+ P:	Linux PCMCIA Team
+ L:	linux-pcmcia@lists.infradead.org
+--- a/drivers/pci/host/Kconfig
++++ b/drivers/pci/host/Kconfig
+@@ -91,4 +91,13 @@ config PCI_XGENE
+ 	  There are 5 internal PCIe ports available. Each port is GEN3 capable
+ 	  and have varied lanes from x1 to x8.
+ 
++config PCIE_QCOM
++	bool "Qualcomm PCIe controller"
++	depends on ARCH_QCOM && OF || (ARM && COMPILE_TEST)
++	select PCIE_DW
++	select PCIEPORTBUS
++	help
++	  Say Y here to enable PCIe controller support on Qualcomm SoCs. The
++	  PCIe controller use Designware core plus Qualcomm specific hardware
++	  wrappers.
+ endmenu
+--- /dev/null
++++ b/drivers/pci/host/pcie-qcom.c
+@@ -0,0 +1,677 @@
++/*
++ * Copyright (c) 2014, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++
++#include <linux/clk.h>
++#include <linux/delay.h>
++#include <linux/gpio.h>
++#include <linux/interrupt.h>
++#include <linux/io.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/of_gpio.h>
++#include <linux/pci.h>
++#include <linux/platform_device.h>
++#include <linux/phy/phy.h>
++#include <linux/regulator/consumer.h>
++#include <linux/reset.h>
++#include <linux/slab.h>
++#include <linux/types.h>
++
++#include "pcie-designware.h"
++
++#define PCIE20_PARF_PHY_CTRL			0x40
++#define PCIE20_PARF_PHY_REFCLK			0x4C
++#define PCIE20_PARF_DBI_BASE_ADDR		0x168
++#define PCIE20_PARF_SLV_ADDR_SPACE_SIZE		0x16c
++#define PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT	0x178
++
++#define PCIE20_ELBI_SYS_CTRL			0x04
++#define PCIE20_ELBI_SYS_STTS			0x08
++#define XMLH_LINK_UP				BIT(10)
++
++#define PCIE20_CAP				0x70
++#define PCIE20_CAP_LINKCTRLSTATUS		(PCIE20_CAP + 0x10)
++
++#define PERST_DELAY_MIN_US			1000
++#define PERST_DELAY_MAX_US			1005
++
++#define LINKUP_DELAY_MIN_US			5000
++#define LINKUP_DELAY_MAX_US			5100
++#define LINKUP_RETRIES_COUNT			20
++
++#define PCIE_V0					0	/* apq8064 */
++#define PCIE_V1					1	/* apq8084 */
++
++struct qcom_pcie_resources_v0 {
++	struct clk *iface_clk;
++	struct clk *core_clk;
++	struct clk *phy_clk;
++	struct reset_control *pci_reset;
++	struct reset_control *axi_reset;
++	struct reset_control *ahb_reset;
++	struct reset_control *por_reset;
++	struct reset_control *phy_reset;
++	struct regulator *vdda;
++	struct regulator *vdda_phy;
++	struct regulator *vdda_refclk;
++};
++
++struct qcom_pcie_resources_v1 {
++	struct clk *iface;
++	struct clk *aux;
++	struct clk *master_bus;
++	struct clk *slave_bus;
++	struct reset_control *core;
++	struct regulator *vdda;
++};
++
++union pcie_resources {
++	struct qcom_pcie_resources_v0 v0;
++	struct qcom_pcie_resources_v1 v1;
++};
++
++struct qcom_pcie {
++	struct pcie_port pp;
++	struct device *dev;
++	union pcie_resources res;
++	void __iomem *parf;
++	void __iomem *dbi;
++	void __iomem *elbi;
++	struct phy *phy;
++	struct gpio_desc *reset;
++	unsigned int version;
++};
++
++#define to_qcom_pcie(x)		container_of(x, struct qcom_pcie, pp)
++
++static inline void
++writel_masked(void __iomem *addr, u32 clear_mask, u32 set_mask)
++{
++	u32 val = readl(addr);
++
++	val &= ~clear_mask;
++	val |= set_mask;
++	writel(val, addr);
++}
++
++static void qcom_ep_reset_assert_deassert(struct qcom_pcie *pcie, int assert)
++{
++	int val, active_low;
++
++	if (IS_ERR_OR_NULL(pcie->reset))
++		return;
++
++	active_low = gpiod_is_active_low(pcie->reset);
++
++	if (assert)
++		val = !!active_low;
++	else
++		val = !active_low;
++
++	gpiod_set_value(pcie->reset, val);
++
++	usleep_range(PERST_DELAY_MIN_US, PERST_DELAY_MAX_US);
++}
++
++static void qcom_ep_reset_assert(struct qcom_pcie *pcie)
++{
++	qcom_ep_reset_assert_deassert(pcie, 1);
++}
++
++static void qcom_ep_reset_deassert(struct qcom_pcie *pcie)
++{
++	qcom_ep_reset_assert_deassert(pcie, 0);
++}
++
++static irqreturn_t qcom_pcie_msi_irq_handler(int irq, void *arg)
++{
++	struct pcie_port *pp = arg;
++
++	return dw_handle_msi_irq(pp);
++}
++
++static int qcom_pcie_link_up(struct pcie_port *pp)
++{
++	struct qcom_pcie *pcie = to_qcom_pcie(pp);
++	u32 val = readl(pcie->dbi + PCIE20_CAP_LINKCTRLSTATUS);
++
++	return val & BIT(29) ? 1 : 0;
++}
++
++static void qcom_pcie_disable_resources_v0(struct qcom_pcie *pcie)
++{
++	struct qcom_pcie_resources_v0 *res = &pcie->res.v0;
++
++	reset_control_assert(res->pci_reset);
++	reset_control_assert(res->axi_reset);
++	reset_control_assert(res->ahb_reset);
++	reset_control_assert(res->por_reset);
++	reset_control_assert(res->pci_reset);
++	clk_disable_unprepare(res->iface_clk);
++	clk_disable_unprepare(res->core_clk);
++	clk_disable_unprepare(res->phy_clk);
++	regulator_disable(res->vdda);
++	regulator_disable(res->vdda_phy);
++	regulator_disable(res->vdda_refclk);
++}
++
++static void qcom_pcie_disable_resources_v1(struct qcom_pcie *pcie)
++{
++	struct qcom_pcie_resources_v1 *res = &pcie->res.v1;
++
++	reset_control_assert(res->core);
++	clk_disable_unprepare(res->slave_bus);
++	clk_disable_unprepare(res->master_bus);
++	clk_disable_unprepare(res->iface);
++	clk_disable_unprepare(res->aux);
++	regulator_disable(res->vdda);
++}
++
++static int qcom_pcie_enable_resources_v0(struct qcom_pcie *pcie)
++{
++	struct qcom_pcie_resources_v0 *res = &pcie->res.v0;
++	struct device *dev = pcie->dev;
++	int ret;
++
++	ret = regulator_enable(res->vdda);
++	if (ret) {
++		dev_err(dev, "cannot enable vdda regulator\n");
++		return ret;
++	}
++
++	ret = regulator_enable(res->vdda_refclk);
++	if (ret) {
++		dev_err(dev, "cannot enable vdda_refclk regulator\n");
++		goto err_refclk;
++	}
++
++	ret = regulator_enable(res->vdda_phy);
++	if (ret) {
++		dev_err(dev, "cannot enable vdda_phy regulator\n");
++		goto err_vdda_phy;
++	}
++
++	ret = clk_prepare_enable(res->iface_clk);
++	if (ret) {
++		dev_err(dev, "cannot prepare/enable iface clock\n");
++		goto err_iface;
++	}
++
++	ret = clk_prepare_enable(res->core_clk);
++	if (ret) {
++		dev_err(dev, "cannot prepare/enable core clock\n");
++		goto err_clk_core;
++	}
++
++	ret = clk_prepare_enable(res->phy_clk);
++	if (ret) {
++		dev_err(dev, "cannot prepare/enable phy clock\n");
++		goto err_clk_phy;
++	}
++
++	ret = reset_control_deassert(res->ahb_reset);
++	if (ret) {
++		dev_err(dev, "cannot deassert ahb reset\n");
++		goto err_reset_ahb;
++	}
++
++	return 0;
++
++err_reset_ahb:
++	clk_disable_unprepare(res->phy_clk);
++err_clk_phy:
++	clk_disable_unprepare(res->core_clk);
++err_clk_core:
++	clk_disable_unprepare(res->iface_clk);
++err_iface:
++	regulator_disable(res->vdda_phy);
++err_vdda_phy:
++	regulator_disable(res->vdda_refclk);
++err_refclk:
++	regulator_disable(res->vdda);
++	return ret;
++}
++
++static int qcom_pcie_enable_resources_v1(struct qcom_pcie *pcie)
++{
++	struct qcom_pcie_resources_v1 *res = &pcie->res.v1;
++	struct device *dev = pcie->dev;
++	int ret;
++
++	ret = reset_control_deassert(res->core);
++	if (ret) {
++		dev_err(dev, "cannot deassert core reset\n");
++		return ret;
++	}
++
++	ret = clk_prepare_enable(res->aux);
++	if (ret) {
++		dev_err(dev, "cannot prepare/enable aux clock\n");
++		goto err_res;
++	}
++
++	ret = clk_prepare_enable(res->iface);
++	if (ret) {
++		dev_err(dev, "cannot prepare/enable iface clock\n");
++		goto err_aux;
++	}
++
++	ret = clk_prepare_enable(res->master_bus);
++	if (ret) {
++		dev_err(dev, "cannot prepare/enable master_bus clock\n");
++		goto err_iface;
++	}
++
++	ret = clk_prepare_enable(res->slave_bus);
++	if (ret) {
++		dev_err(dev, "cannot prepare/enable slave_bus clock\n");
++		goto err_master;
++	}
++
++	ret = regulator_enable(res->vdda);
++	if (ret) {
++		dev_err(dev, "cannot enable vdda regulator\n");
++		goto err_slave;
++	}
++
++	return 0;
++
++err_slave:
++	clk_disable_unprepare(res->slave_bus);
++err_master:
++	clk_disable_unprepare(res->master_bus);
++err_iface:
++	clk_disable_unprepare(res->iface);
++err_aux:
++	clk_disable_unprepare(res->aux);
++err_res:
++	reset_control_assert(res->core);
++
++	return ret;
++}
++
++static int qcom_pcie_get_resources_v0(struct qcom_pcie *pcie)
++{
++	struct qcom_pcie_resources_v0 *res = &pcie->res.v0;
++	struct device *dev = pcie->dev;
++
++	res->vdda = devm_regulator_get(dev, "vdda");
++	if (IS_ERR(res->vdda))
++		return PTR_ERR(res->vdda);
++
++	res->vdda_phy = devm_regulator_get(dev, "vdda_phy");
++	if (IS_ERR(res->vdda_phy))
++		return PTR_ERR(res->vdda_phy);
++
++	res->vdda_refclk = devm_regulator_get(dev, "vdda_refclk");
++	if (IS_ERR(res->vdda_refclk))
++		return PTR_ERR(res->vdda_refclk);
++
++	res->iface_clk = devm_clk_get(dev, "iface");
++	if (IS_ERR(res->iface_clk))
++		return PTR_ERR(res->iface_clk);
++
++	res->core_clk = devm_clk_get(dev, "core");
++	if (IS_ERR(res->core_clk))
++		return PTR_ERR(res->core_clk);
++
++	res->phy_clk = devm_clk_get(dev, "phy");
++	if (IS_ERR(res->phy_clk))
++		return PTR_ERR(res->phy_clk);
++
++	res->pci_reset = devm_reset_control_get(dev, "pci");
++	if (IS_ERR(res->pci_reset))
++		return PTR_ERR(res->pci_reset);
++
++	res->axi_reset = devm_reset_control_get(dev, "axi");
++	if (IS_ERR(res->axi_reset))
++		return PTR_ERR(res->axi_reset);
++
++	res->ahb_reset = devm_reset_control_get(dev, "ahb");
++	if (IS_ERR(res->ahb_reset))
++		return PTR_ERR(res->ahb_reset);
++
++	res->por_reset = devm_reset_control_get(dev, "por");
++	if (IS_ERR(res->por_reset))
++		return PTR_ERR(res->por_reset);
++
++	res->phy_reset = devm_reset_control_get(dev, "phy");
++	if (IS_ERR(res->phy_reset))
++		return PTR_ERR(res->phy_reset);
++
++	return 0;
++}
++
++static int qcom_pcie_get_resources_v1(struct qcom_pcie *pcie)
++{
++	struct qcom_pcie_resources_v1 *res = &pcie->res.v1;
++	struct device *dev = pcie->dev;
++
++	res->vdda = devm_regulator_get(dev, "vdda");
++	if (IS_ERR(res->vdda))
++		return PTR_ERR(res->vdda);
++
++	res->iface = devm_clk_get(dev, "iface");
++	if (IS_ERR(res->iface))
++		return PTR_ERR(res->iface);
++
++	res->aux = devm_clk_get(dev, "aux");
++	if (IS_ERR(res->aux) && PTR_ERR(res->aux) == -EPROBE_DEFER)
++		return -EPROBE_DEFER;
++	else if (IS_ERR(res->aux))
++		res->aux = NULL;
++
++	res->master_bus = devm_clk_get(dev, "master_bus");
++	if (IS_ERR(res->master_bus))
++		return PTR_ERR(res->master_bus);
++
++	res->slave_bus = devm_clk_get(dev, "slave_bus");
++	if (IS_ERR(res->slave_bus))
++		return PTR_ERR(res->slave_bus);
++
++	res->core = devm_reset_control_get(dev, "core");
++	if (IS_ERR(res->core))
++		return PTR_ERR(res->core);
++
++	return 0;
++}
++
++static int qcom_pcie_enable_link_training(struct pcie_port *pp)
++{
++	struct qcom_pcie *pcie = to_qcom_pcie(pp);
++	struct device *dev = pp->dev;
++	int retries;
++	u32 val;
++
++	/* enable link training */
++	writel_masked(pcie->elbi + PCIE20_ELBI_SYS_CTRL, 0, BIT(0));
++
++	/* wait for up to 100ms for the link to come up */
++	retries = LINKUP_RETRIES_COUNT;
++	do {
++		val = readl(pcie->elbi + PCIE20_ELBI_SYS_STTS);
++		if (val & XMLH_LINK_UP)
++			break;
++		usleep_range(LINKUP_DELAY_MIN_US, LINKUP_DELAY_MAX_US);
++	} while (retries--);
++
++	if (retries < 0 || !dw_pcie_link_up(pp)) {
++		dev_err(dev, "link initialization failed\n");
++		return -ENXIO;
++	}
++
++	return 0;
++}
++
++static void qcom_pcie_host_init_v1(struct pcie_port *pp)
++{
++	struct qcom_pcie *pcie = to_qcom_pcie(pp);
++	int ret;
++
++	qcom_ep_reset_assert(pcie);
++
++	ret = qcom_pcie_enable_resources_v1(pcie);
++	if (ret)
++		return;
++
++	/* change DBI base address */
++	writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
++
++	if (IS_ENABLED(CONFIG_PCI_MSI))
++		writel_masked(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT,
++			      0, BIT(31));
++
++	ret = phy_init(pcie->phy);
++	if (ret)
++		goto err_res;
++
++	ret = phy_power_on(pcie->phy);
++	if (ret)
++		goto err_phy;
++
++	dw_pcie_setup_rc(pp);
++
++	if (IS_ENABLED(CONFIG_PCI_MSI))
++		dw_pcie_msi_init(pp);
++
++	qcom_ep_reset_deassert(pcie);
++
++	ret = qcom_pcie_enable_link_training(pp);
++	if (ret)
++		goto err;
++
++	return;
++
++err:
++	qcom_ep_reset_assert(pcie);
++	phy_power_off(pcie->phy);
++err_phy:
++	phy_exit(pcie->phy);
++err_res:
++	qcom_pcie_disable_resources_v1(pcie);
++}
++
++static void qcom_pcie_host_init_v0(struct pcie_port *pp)
++{
++	struct qcom_pcie *pcie = to_qcom_pcie(pp);
++	struct qcom_pcie_resources_v0 *res = &pcie->res.v0;
++	struct device *dev = pcie->dev;
++	int ret;
++
++	qcom_ep_reset_assert(pcie);
++
++	ret = qcom_pcie_enable_resources_v0(pcie);
++	if (ret)
++		return;
++
++	writel_masked(pcie->parf + PCIE20_PARF_PHY_CTRL, BIT(0), 0);
++
++	/* enable external reference clock */
++	writel_masked(pcie->parf + PCIE20_PARF_PHY_REFCLK, 0, BIT(16));
++
++	ret = reset_control_deassert(res->phy_reset);
++	if (ret) {
++		dev_err(dev, "cannot deassert phy reset\n");
++		return;
++	}
++
++	ret = reset_control_deassert(res->pci_reset);
++	if (ret) {
++		dev_err(dev, "cannot deassert pci reset\n");
++		return;
++	}
++
++	ret = reset_control_deassert(res->por_reset);
++	if (ret) {
++		dev_err(dev, "cannot deassert por reset\n");
++		return;
++	}
++
++	ret = reset_control_deassert(res->axi_reset);
++	if (ret) {
++		dev_err(dev, "cannot deassert axi reset\n");
++		return;
++	}
++
++	/* wait 150ms for clock acquisition */
++	usleep_range(10000, 15000);
++
++	dw_pcie_setup_rc(pp);
++
++	if (IS_ENABLED(CONFIG_PCI_MSI))
++		dw_pcie_msi_init(pp);
++
++	qcom_ep_reset_deassert(pcie);
++
++	ret = qcom_pcie_enable_link_training(pp);
++	if (ret)
++		goto err;
++
++	return;
++err:
++	qcom_ep_reset_assert(pcie);
++	qcom_pcie_disable_resources_v0(pcie);
++}
++
++static void qcom_pcie_host_init(struct pcie_port *pp)
++{
++	struct qcom_pcie *pcie = to_qcom_pcie(pp);
++
++	if (pcie->version == PCIE_V0)
++		return qcom_pcie_host_init_v0(pp);
++	else
++		return qcom_pcie_host_init_v1(pp);
++}
++
++static int
++qcom_pcie_rd_own_conf(struct pcie_port *pp, int where, int size, u32 *val)
++{
++	/* the device class is not reported correctly from the register */
++	if (where == PCI_CLASS_REVISION && size == 4) {
++		*val = readl(pp->dbi_base + PCI_CLASS_REVISION);
++		*val &= ~(0xffff << 16);
++		*val |= PCI_CLASS_BRIDGE_PCI << 16;
++		return PCIBIOS_SUCCESSFUL;
++	}
++
++	return dw_pcie_cfg_read(pp->dbi_base + (where & ~0x3), where,
++				size, val);
++}
++
++static struct pcie_host_ops qcom_pcie_ops = {
++	.link_up = qcom_pcie_link_up,
++	.host_init = qcom_pcie_host_init,
++	.rd_own_conf = qcom_pcie_rd_own_conf,
++};
++
++static const struct of_device_id qcom_pcie_match[] = {
++	{ .compatible = "qcom,pcie-v0", .data = (void *)PCIE_V0 },
++	{ .compatible = "qcom,pcie-v1", .data = (void *)PCIE_V1 },
++	{ }
++};
++
++static int qcom_pcie_probe(struct platform_device *pdev)
++{
++	struct device *dev = &pdev->dev;
++	const struct of_device_id *match;
++	struct resource *res;
++	struct qcom_pcie *pcie;
++	struct pcie_port *pp;
++	int ret;
++
++	match = of_match_node(qcom_pcie_match, dev->of_node);
++	if (!match)
++		return -ENXIO;
++
++	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
++	if (!pcie)
++		return -ENOMEM;
++
++	pcie->version = (unsigned int)match->data;
++
++	pcie->reset = devm_gpiod_get_optional(dev, "perst");
++	if (IS_ERR(pcie->reset) && PTR_ERR(pcie->reset) == -EPROBE_DEFER)
++		return PTR_ERR(pcie->reset);
++
++	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "parf");
++	pcie->parf = devm_ioremap_resource(dev, res);
++	if (IS_ERR(pcie->parf))
++		return PTR_ERR(pcie->parf);
++
++	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
++	pcie->dbi = devm_ioremap_resource(dev, res);
++	if (IS_ERR(pcie->dbi))
++		return PTR_ERR(pcie->dbi);
++
++	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "elbi");
++	pcie->elbi = devm_ioremap_resource(dev, res);
++	if (IS_ERR(pcie->elbi))
++		return PTR_ERR(pcie->elbi);
++
++	pcie->phy = devm_phy_optional_get(dev, "pciephy");
++	if (IS_ERR(pcie->phy))
++		return PTR_ERR(pcie->phy);
++
++	pcie->dev = dev;
++
++	if (pcie->version == PCIE_V0)
++		ret = qcom_pcie_get_resources_v0(pcie);
++	else
++		ret = qcom_pcie_get_resources_v1(pcie);
++
++	if (ret)
++		return ret;
++
++	pp = &pcie->pp;
++	pp->dev = dev;
++	pp->dbi_base = pcie->dbi;
++	pp->root_bus_nr = -1;
++	pp->ops = &qcom_pcie_ops;
++
++	if (IS_ENABLED(CONFIG_PCI_MSI)) {
++		pp->msi_irq = platform_get_irq_byname(pdev, "msi");
++		if (pp->msi_irq < 0) {
++			dev_err(dev, "cannot get msi irq\n");
++			return pp->msi_irq;
++		}
++
++		ret = devm_request_irq(dev, pp->msi_irq,
++				       qcom_pcie_msi_irq_handler,
++				       IRQF_SHARED, "qcom-pcie-msi", pp);
++		if (ret) {
++			dev_err(dev, "cannot request msi irq\n");
++			return ret;
++		}
++	}
++
++	ret = dw_pcie_host_init(pp);
++	if (ret) {
++		dev_err(dev, "cannot initialize host\n");
++		return ret;
++	}
++
++	platform_set_drvdata(pdev, pcie);
++
++	return 0;
++}
++
++static int qcom_pcie_remove(struct platform_device *pdev)
++{
++	struct qcom_pcie *pcie = platform_get_drvdata(pdev);
++
++	qcom_ep_reset_assert(pcie);
++	phy_power_off(pcie->phy);
++	phy_exit(pcie->phy);
++	if (pcie->version == PCIE_V0)
++		qcom_pcie_disable_resources_v0(pcie);
++	else
++		qcom_pcie_disable_resources_v1(pcie);
++
++	return 0;
++}
++
++static struct platform_driver qcom_pcie_driver = {
++	.probe = qcom_pcie_probe,
++	.remove = qcom_pcie_remove,
++	.driver = {
++		.name = "qcom-pcie",
++		.of_match_table = qcom_pcie_match,
++	},
++};
++
++module_platform_driver(qcom_pcie_driver);
++
++MODULE_AUTHOR("Stanimir Varbanov <svarbanov@mm-sol.com>");
++MODULE_DESCRIPTION("Qualcomm PCIe root complex driver");
++MODULE_LICENSE("GPL v2");
++MODULE_ALIAS("platform:qcom-pcie");
+--- a/drivers/pci/host/Makefile
++++ b/drivers/pci/host/Makefile
+@@ -11,3 +11,4 @@ obj-$(CONFIG_PCIE_SPEAR13XX) += pcie-spe
+ obj-$(CONFIG_PCI_KEYSTONE) += pci-keystone-dw.o pci-keystone.o
+ obj-$(CONFIG_PCIE_XILINX) += pcie-xilinx.o
+ obj-$(CONFIG_PCI_XGENE) += pci-xgene.o
++obj-$(CONFIG_PCIE_QCOM) += pcie-qcom.o