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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:30 +0000
commit76cb841cb886eef6b3bee341a2266c76578724ad (patch)
treef5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /drivers/pci/controller/dwc/pcie-qcom.c
parentInitial commit. (diff)
downloadlinux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz
linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip
Adding upstream version 4.19.249.upstream/4.19.249upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/pci/controller/dwc/pcie-qcom.c')
-rw-r--r--drivers/pci/controller/dwc/pcie-qcom.c1374
1 files changed, 1374 insertions, 0 deletions
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
new file mode 100644
index 000000000..133fad284
--- /dev/null
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -0,0 +1,1374 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Qualcomm PCIe root complex driver
+ *
+ * Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
+ * Copyright 2015 Linaro Limited.
+ *
+ * Author: Stanimir Varbanov <svarbanov@mm-sol.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/pci.h>
+#include <linux/pm_runtime.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_SYS_CTRL 0x00
+#define MST_WAKEUP_EN BIT(13)
+#define SLV_WAKEUP_EN BIT(12)
+#define MSTR_ACLK_CGC_DIS BIT(10)
+#define SLV_ACLK_CGC_DIS BIT(9)
+#define CORE_CLK_CGC_DIS BIT(6)
+#define AUX_PWR_DET BIT(4)
+#define L23_CLK_RMV_DIS BIT(2)
+#define L1_CLK_RMV_DIS BIT(1)
+
+#define PCIE20_COMMAND_STATUS 0x04
+#define CMD_BME_VAL 0x4
+#define PCIE20_DEVICE_CONTROL2_STATUS2 0x98
+#define PCIE_CAP_CPL_TIMEOUT_DISABLE 0x10
+
+#define PCIE20_PARF_PHY_CTRL 0x40
+#define PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK GENMASK(20, 16)
+#define PHY_CTRL_PHY_TX0_TERM_OFFSET(x) ((x) << 16)
+
+#define PCIE20_PARF_PHY_REFCLK 0x4C
+#define PHY_REFCLK_SSP_EN BIT(16)
+#define PHY_REFCLK_USE_PAD BIT(12)
+
+#define PCIE20_PARF_DBI_BASE_ADDR 0x168
+#define PCIE20_PARF_SLV_ADDR_SPACE_SIZE 0x16C
+#define PCIE20_PARF_MHI_CLOCK_RESET_CTRL 0x174
+#define PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT 0x178
+#define PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2 0x1A8
+#define PCIE20_PARF_LTSSM 0x1B0
+#define PCIE20_PARF_SID_OFFSET 0x234
+#define PCIE20_PARF_BDF_TRANSLATE_CFG 0x24C
+
+#define PCIE20_ELBI_SYS_CTRL 0x04
+#define PCIE20_ELBI_SYS_CTRL_LT_ENABLE BIT(0)
+
+#define PCIE20_AXI_MSTR_RESP_COMP_CTRL0 0x818
+#define CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K 0x4
+#define CFG_REMOTE_RD_REQ_BRIDGE_SIZE_4K 0x5
+#define PCIE20_AXI_MSTR_RESP_COMP_CTRL1 0x81c
+#define CFG_BRIDGE_SB_INIT BIT(0)
+
+#define PCIE20_CAP 0x70
+#define PCIE20_CAP_LINK_CAPABILITIES (PCIE20_CAP + 0xC)
+#define PCIE20_CAP_ACTIVE_STATE_LINK_PM_SUPPORT (BIT(10) | BIT(11))
+#define PCIE20_CAP_LINK_1 (PCIE20_CAP + 0x14)
+#define PCIE_CAP_LINK1_VAL 0x2FD7F
+
+#define PCIE20_PARF_Q2A_FLUSH 0x1AC
+
+#define PCIE20_MISC_CONTROL_1_REG 0x8BC
+#define DBI_RO_WR_EN 1
+
+#define PERST_DELAY_US 1000
+/* PARF registers */
+#define PCIE20_PARF_PCS_DEEMPH 0x34
+#define PCS_DEEMPH_TX_DEEMPH_GEN1(x) ((x) << 16)
+#define PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(x) ((x) << 8)
+#define PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(x) ((x) << 0)
+
+#define PCIE20_PARF_PCS_SWING 0x38
+#define PCS_SWING_TX_SWING_FULL(x) ((x) << 8)
+#define PCS_SWING_TX_SWING_LOW(x) ((x) << 0)
+
+#define PCIE20_PARF_CONFIG_BITS 0x50
+#define PHY_RX0_EQ(x) ((x) << 24)
+
+#define PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE 0x358
+#define SLV_ADDR_SPACE_SZ 0x10000000
+
+#define QCOM_PCIE_2_1_0_MAX_SUPPLY 3
+struct qcom_pcie_resources_2_1_0 {
+ 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 reset_control *ext_reset;
+ struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY];
+};
+
+struct qcom_pcie_resources_1_0_0 {
+ struct clk *iface;
+ struct clk *aux;
+ struct clk *master_bus;
+ struct clk *slave_bus;
+ struct reset_control *core;
+ struct regulator *vdda;
+};
+
+#define QCOM_PCIE_2_3_2_MAX_SUPPLY 2
+struct qcom_pcie_resources_2_3_2 {
+ struct clk *aux_clk;
+ struct clk *master_clk;
+ struct clk *slave_clk;
+ struct clk *cfg_clk;
+ struct clk *pipe_clk;
+ struct regulator_bulk_data supplies[QCOM_PCIE_2_3_2_MAX_SUPPLY];
+};
+
+struct qcom_pcie_resources_2_4_0 {
+ struct clk *aux_clk;
+ struct clk *master_clk;
+ struct clk *slave_clk;
+ struct reset_control *axi_m_reset;
+ struct reset_control *axi_s_reset;
+ struct reset_control *pipe_reset;
+ struct reset_control *axi_m_vmid_reset;
+ struct reset_control *axi_s_xpu_reset;
+ struct reset_control *parf_reset;
+ struct reset_control *phy_reset;
+ struct reset_control *axi_m_sticky_reset;
+ struct reset_control *pipe_sticky_reset;
+ struct reset_control *pwr_reset;
+ struct reset_control *ahb_reset;
+ struct reset_control *phy_ahb_reset;
+};
+
+struct qcom_pcie_resources_2_3_3 {
+ struct clk *iface;
+ struct clk *axi_m_clk;
+ struct clk *axi_s_clk;
+ struct clk *ahb_clk;
+ struct clk *aux_clk;
+ struct reset_control *rst[7];
+};
+
+union qcom_pcie_resources {
+ struct qcom_pcie_resources_1_0_0 v1_0_0;
+ struct qcom_pcie_resources_2_1_0 v2_1_0;
+ struct qcom_pcie_resources_2_3_2 v2_3_2;
+ struct qcom_pcie_resources_2_3_3 v2_3_3;
+ struct qcom_pcie_resources_2_4_0 v2_4_0;
+};
+
+struct qcom_pcie;
+
+struct qcom_pcie_ops {
+ int (*get_resources)(struct qcom_pcie *pcie);
+ int (*init)(struct qcom_pcie *pcie);
+ int (*post_init)(struct qcom_pcie *pcie);
+ void (*deinit)(struct qcom_pcie *pcie);
+ void (*post_deinit)(struct qcom_pcie *pcie);
+ void (*ltssm_enable)(struct qcom_pcie *pcie);
+};
+
+struct qcom_pcie {
+ struct dw_pcie *pci;
+ void __iomem *parf; /* DT parf */
+ void __iomem *elbi; /* DT elbi */
+ union qcom_pcie_resources res;
+ struct phy *phy;
+ struct gpio_desc *reset;
+ const struct qcom_pcie_ops *ops;
+};
+
+#define to_qcom_pcie(x) dev_get_drvdata((x)->dev)
+
+static void qcom_ep_reset_assert(struct qcom_pcie *pcie)
+{
+ gpiod_set_value_cansleep(pcie->reset, 1);
+ usleep_range(PERST_DELAY_US, PERST_DELAY_US + 500);
+}
+
+static void qcom_ep_reset_deassert(struct qcom_pcie *pcie)
+{
+ /* Ensure that PERST has been asserted for at least 100 ms */
+ msleep(100);
+ gpiod_set_value_cansleep(pcie->reset, 0);
+ usleep_range(PERST_DELAY_US, PERST_DELAY_US + 500);
+}
+
+static int qcom_pcie_establish_link(struct qcom_pcie *pcie)
+{
+ struct dw_pcie *pci = pcie->pci;
+
+ if (dw_pcie_link_up(pci))
+ return 0;
+
+ /* Enable Link Training state machine */
+ if (pcie->ops->ltssm_enable)
+ pcie->ops->ltssm_enable(pcie);
+
+ return dw_pcie_wait_for_link(pci);
+}
+
+static void qcom_pcie_2_1_0_ltssm_enable(struct qcom_pcie *pcie)
+{
+ u32 val;
+
+ /* enable link training */
+ val = readl(pcie->elbi + PCIE20_ELBI_SYS_CTRL);
+ val |= PCIE20_ELBI_SYS_CTRL_LT_ENABLE;
+ writel(val, pcie->elbi + PCIE20_ELBI_SYS_CTRL);
+}
+
+static int qcom_pcie_get_resources_2_1_0(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->dev;
+ int ret;
+
+ res->supplies[0].supply = "vdda";
+ res->supplies[1].supply = "vdda_phy";
+ res->supplies[2].supply = "vdda_refclk";
+ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(res->supplies),
+ res->supplies);
+ if (ret)
+ return ret;
+
+ 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_exclusive(dev, "pci");
+ if (IS_ERR(res->pci_reset))
+ return PTR_ERR(res->pci_reset);
+
+ res->axi_reset = devm_reset_control_get_exclusive(dev, "axi");
+ if (IS_ERR(res->axi_reset))
+ return PTR_ERR(res->axi_reset);
+
+ res->ahb_reset = devm_reset_control_get_exclusive(dev, "ahb");
+ if (IS_ERR(res->ahb_reset))
+ return PTR_ERR(res->ahb_reset);
+
+ res->por_reset = devm_reset_control_get_exclusive(dev, "por");
+ if (IS_ERR(res->por_reset))
+ return PTR_ERR(res->por_reset);
+
+ res->ext_reset = devm_reset_control_get_optional_exclusive(dev, "ext");
+ if (IS_ERR(res->ext_reset))
+ return PTR_ERR(res->ext_reset);
+
+ res->phy_reset = devm_reset_control_get_exclusive(dev, "phy");
+ return PTR_ERR_OR_ZERO(res->phy_reset);
+}
+
+static void qcom_pcie_deinit_2_1_0(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
+
+ 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->ext_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_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
+}
+
+static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->dev;
+ struct device_node *node = dev->of_node;
+ u32 val;
+ int ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
+ if (ret < 0) {
+ dev_err(dev, "cannot enable regulators\n");
+ return ret;
+ }
+
+ ret = reset_control_assert(res->ahb_reset);
+ if (ret) {
+ dev_err(dev, "cannot assert ahb reset\n");
+ goto err_assert_ahb;
+ }
+
+ ret = clk_prepare_enable(res->iface_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable iface clock\n");
+ goto err_assert_ahb;
+ }
+
+ ret = clk_prepare_enable(res->phy_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable phy clock\n");
+ goto err_clk_phy;
+ }
+
+ ret = clk_prepare_enable(res->core_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable core clock\n");
+ goto err_clk_core;
+ }
+
+ ret = reset_control_deassert(res->ahb_reset);
+ if (ret) {
+ dev_err(dev, "cannot deassert ahb reset\n");
+ goto err_deassert_ahb;
+ }
+
+ ret = reset_control_deassert(res->ext_reset);
+ if (ret) {
+ dev_err(dev, "cannot deassert ext reset\n");
+ goto err_deassert_ahb;
+ }
+
+ /* enable PCIe clocks and resets */
+ val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
+ val &= ~BIT(0);
+ writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
+
+ if (of_device_is_compatible(node, "qcom,pcie-ipq8064")) {
+ writel(PCS_DEEMPH_TX_DEEMPH_GEN1(24) |
+ PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(24) |
+ PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(34),
+ pcie->parf + PCIE20_PARF_PCS_DEEMPH);
+ writel(PCS_SWING_TX_SWING_FULL(120) |
+ PCS_SWING_TX_SWING_LOW(120),
+ pcie->parf + PCIE20_PARF_PCS_SWING);
+ writel(PHY_RX0_EQ(4), pcie->parf + PCIE20_PARF_CONFIG_BITS);
+ }
+
+ if (of_device_is_compatible(node, "qcom,pcie-ipq8064")) {
+ /* set TX termination offset */
+ val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
+ val &= ~PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK;
+ val |= PHY_CTRL_PHY_TX0_TERM_OFFSET(7);
+ writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
+ }
+
+ /* enable external reference clock */
+ val = readl(pcie->parf + PCIE20_PARF_PHY_REFCLK);
+ /* USE_PAD is required only for ipq806x */
+ if (!of_device_is_compatible(node, "qcom,pcie-apq8064"))
+ val &= ~PHY_REFCLK_USE_PAD;
+ val |= PHY_REFCLK_SSP_EN;
+ writel(val, pcie->parf + PCIE20_PARF_PHY_REFCLK);
+
+ ret = reset_control_deassert(res->phy_reset);
+ if (ret) {
+ dev_err(dev, "cannot deassert phy reset\n");
+ return ret;
+ }
+
+ ret = reset_control_deassert(res->pci_reset);
+ if (ret) {
+ dev_err(dev, "cannot deassert pci reset\n");
+ return ret;
+ }
+
+ ret = reset_control_deassert(res->por_reset);
+ if (ret) {
+ dev_err(dev, "cannot deassert por reset\n");
+ return ret;
+ }
+
+ ret = reset_control_deassert(res->axi_reset);
+ if (ret) {
+ dev_err(dev, "cannot deassert axi reset\n");
+ return ret;
+ }
+
+ /* wait for clock acquisition */
+ usleep_range(1000, 1500);
+
+
+ /* Set the Max TLP size to 2K, instead of using default of 4K */
+ writel(CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K,
+ pci->dbi_base + PCIE20_AXI_MSTR_RESP_COMP_CTRL0);
+ writel(CFG_BRIDGE_SB_INIT,
+ pci->dbi_base + PCIE20_AXI_MSTR_RESP_COMP_CTRL1);
+
+ return 0;
+
+err_deassert_ahb:
+ clk_disable_unprepare(res->core_clk);
+err_clk_core:
+ clk_disable_unprepare(res->phy_clk);
+err_clk_phy:
+ clk_disable_unprepare(res->iface_clk);
+err_assert_ahb:
+ regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
+
+ return ret;
+}
+
+static int qcom_pcie_get_resources_1_0_0(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_resources_1_0_0 *res = &pcie->res.v1_0_0;
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->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))
+ return PTR_ERR(res->aux);
+
+ 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_exclusive(dev, "core");
+ return PTR_ERR_OR_ZERO(res->core);
+}
+
+static void qcom_pcie_deinit_1_0_0(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_resources_1_0_0 *res = &pcie->res.v1_0_0;
+
+ 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_init_1_0_0(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_resources_1_0_0 *res = &pcie->res.v1_0_0;
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->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;
+ }
+
+ /* change DBI base address */
+ writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
+
+ if (IS_ENABLED(CONFIG_PCI_MSI)) {
+ u32 val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT);
+
+ val |= BIT(31);
+ writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT);
+ }
+
+ 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 void qcom_pcie_2_3_2_ltssm_enable(struct qcom_pcie *pcie)
+{
+ u32 val;
+
+ /* enable link training */
+ val = readl(pcie->parf + PCIE20_PARF_LTSSM);
+ val |= BIT(8);
+ writel(val, pcie->parf + PCIE20_PARF_LTSSM);
+}
+
+static int qcom_pcie_get_resources_2_3_2(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->dev;
+ int ret;
+
+ res->supplies[0].supply = "vdda";
+ res->supplies[1].supply = "vddpe-3v3";
+ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(res->supplies),
+ res->supplies);
+ if (ret)
+ return ret;
+
+ res->aux_clk = devm_clk_get(dev, "aux");
+ if (IS_ERR(res->aux_clk))
+ return PTR_ERR(res->aux_clk);
+
+ res->cfg_clk = devm_clk_get(dev, "cfg");
+ if (IS_ERR(res->cfg_clk))
+ return PTR_ERR(res->cfg_clk);
+
+ res->master_clk = devm_clk_get(dev, "bus_master");
+ if (IS_ERR(res->master_clk))
+ return PTR_ERR(res->master_clk);
+
+ res->slave_clk = devm_clk_get(dev, "bus_slave");
+ if (IS_ERR(res->slave_clk))
+ return PTR_ERR(res->slave_clk);
+
+ res->pipe_clk = devm_clk_get(dev, "pipe");
+ return PTR_ERR_OR_ZERO(res->pipe_clk);
+}
+
+static void qcom_pcie_deinit_2_3_2(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
+
+ clk_disable_unprepare(res->slave_clk);
+ clk_disable_unprepare(res->master_clk);
+ clk_disable_unprepare(res->cfg_clk);
+ clk_disable_unprepare(res->aux_clk);
+
+ regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
+}
+
+static void qcom_pcie_post_deinit_2_3_2(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
+
+ clk_disable_unprepare(res->pipe_clk);
+}
+
+static int qcom_pcie_init_2_3_2(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->dev;
+ u32 val;
+ int ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
+ if (ret < 0) {
+ dev_err(dev, "cannot enable regulators\n");
+ return ret;
+ }
+
+ ret = clk_prepare_enable(res->aux_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable aux clock\n");
+ goto err_aux_clk;
+ }
+
+ ret = clk_prepare_enable(res->cfg_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable cfg clock\n");
+ goto err_cfg_clk;
+ }
+
+ ret = clk_prepare_enable(res->master_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable master clock\n");
+ goto err_master_clk;
+ }
+
+ ret = clk_prepare_enable(res->slave_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable slave clock\n");
+ goto err_slave_clk;
+ }
+
+ /* enable PCIe clocks and resets */
+ val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
+ val &= ~BIT(0);
+ writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
+
+ /* change DBI base address */
+ writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
+
+ /* MAC PHY_POWERDOWN MUX DISABLE */
+ val = readl(pcie->parf + PCIE20_PARF_SYS_CTRL);
+ val &= ~BIT(29);
+ writel(val, pcie->parf + PCIE20_PARF_SYS_CTRL);
+
+ val = readl(pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
+ val |= BIT(4);
+ writel(val, pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
+
+ val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
+ val |= BIT(31);
+ writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
+
+ return 0;
+
+err_slave_clk:
+ clk_disable_unprepare(res->master_clk);
+err_master_clk:
+ clk_disable_unprepare(res->cfg_clk);
+err_cfg_clk:
+ clk_disable_unprepare(res->aux_clk);
+
+err_aux_clk:
+ regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
+
+ return ret;
+}
+
+static int qcom_pcie_post_init_2_3_2(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->dev;
+ int ret;
+
+ ret = clk_prepare_enable(res->pipe_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable pipe clock\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int qcom_pcie_get_resources_2_4_0(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_resources_2_4_0 *res = &pcie->res.v2_4_0;
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->dev;
+
+ res->aux_clk = devm_clk_get(dev, "aux");
+ if (IS_ERR(res->aux_clk))
+ return PTR_ERR(res->aux_clk);
+
+ res->master_clk = devm_clk_get(dev, "master_bus");
+ if (IS_ERR(res->master_clk))
+ return PTR_ERR(res->master_clk);
+
+ res->slave_clk = devm_clk_get(dev, "slave_bus");
+ if (IS_ERR(res->slave_clk))
+ return PTR_ERR(res->slave_clk);
+
+ res->axi_m_reset = devm_reset_control_get_exclusive(dev, "axi_m");
+ if (IS_ERR(res->axi_m_reset))
+ return PTR_ERR(res->axi_m_reset);
+
+ res->axi_s_reset = devm_reset_control_get_exclusive(dev, "axi_s");
+ if (IS_ERR(res->axi_s_reset))
+ return PTR_ERR(res->axi_s_reset);
+
+ res->pipe_reset = devm_reset_control_get_exclusive(dev, "pipe");
+ if (IS_ERR(res->pipe_reset))
+ return PTR_ERR(res->pipe_reset);
+
+ res->axi_m_vmid_reset = devm_reset_control_get_exclusive(dev,
+ "axi_m_vmid");
+ if (IS_ERR(res->axi_m_vmid_reset))
+ return PTR_ERR(res->axi_m_vmid_reset);
+
+ res->axi_s_xpu_reset = devm_reset_control_get_exclusive(dev,
+ "axi_s_xpu");
+ if (IS_ERR(res->axi_s_xpu_reset))
+ return PTR_ERR(res->axi_s_xpu_reset);
+
+ res->parf_reset = devm_reset_control_get_exclusive(dev, "parf");
+ if (IS_ERR(res->parf_reset))
+ return PTR_ERR(res->parf_reset);
+
+ res->phy_reset = devm_reset_control_get_exclusive(dev, "phy");
+ if (IS_ERR(res->phy_reset))
+ return PTR_ERR(res->phy_reset);
+
+ res->axi_m_sticky_reset = devm_reset_control_get_exclusive(dev,
+ "axi_m_sticky");
+ if (IS_ERR(res->axi_m_sticky_reset))
+ return PTR_ERR(res->axi_m_sticky_reset);
+
+ res->pipe_sticky_reset = devm_reset_control_get_exclusive(dev,
+ "pipe_sticky");
+ if (IS_ERR(res->pipe_sticky_reset))
+ return PTR_ERR(res->pipe_sticky_reset);
+
+ res->pwr_reset = devm_reset_control_get_exclusive(dev, "pwr");
+ if (IS_ERR(res->pwr_reset))
+ return PTR_ERR(res->pwr_reset);
+
+ res->ahb_reset = devm_reset_control_get_exclusive(dev, "ahb");
+ if (IS_ERR(res->ahb_reset))
+ return PTR_ERR(res->ahb_reset);
+
+ res->phy_ahb_reset = devm_reset_control_get_exclusive(dev, "phy_ahb");
+ if (IS_ERR(res->phy_ahb_reset))
+ return PTR_ERR(res->phy_ahb_reset);
+
+ return 0;
+}
+
+static void qcom_pcie_deinit_2_4_0(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_resources_2_4_0 *res = &pcie->res.v2_4_0;
+
+ reset_control_assert(res->axi_m_reset);
+ reset_control_assert(res->axi_s_reset);
+ reset_control_assert(res->pipe_reset);
+ reset_control_assert(res->pipe_sticky_reset);
+ reset_control_assert(res->phy_reset);
+ reset_control_assert(res->phy_ahb_reset);
+ reset_control_assert(res->axi_m_sticky_reset);
+ reset_control_assert(res->pwr_reset);
+ reset_control_assert(res->ahb_reset);
+ clk_disable_unprepare(res->aux_clk);
+ clk_disable_unprepare(res->master_clk);
+ clk_disable_unprepare(res->slave_clk);
+}
+
+static int qcom_pcie_init_2_4_0(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_resources_2_4_0 *res = &pcie->res.v2_4_0;
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->dev;
+ u32 val;
+ int ret;
+
+ ret = reset_control_assert(res->axi_m_reset);
+ if (ret) {
+ dev_err(dev, "cannot assert axi master reset\n");
+ return ret;
+ }
+
+ ret = reset_control_assert(res->axi_s_reset);
+ if (ret) {
+ dev_err(dev, "cannot assert axi slave reset\n");
+ return ret;
+ }
+
+ usleep_range(10000, 12000);
+
+ ret = reset_control_assert(res->pipe_reset);
+ if (ret) {
+ dev_err(dev, "cannot assert pipe reset\n");
+ return ret;
+ }
+
+ ret = reset_control_assert(res->pipe_sticky_reset);
+ if (ret) {
+ dev_err(dev, "cannot assert pipe sticky reset\n");
+ return ret;
+ }
+
+ ret = reset_control_assert(res->phy_reset);
+ if (ret) {
+ dev_err(dev, "cannot assert phy reset\n");
+ return ret;
+ }
+
+ ret = reset_control_assert(res->phy_ahb_reset);
+ if (ret) {
+ dev_err(dev, "cannot assert phy ahb reset\n");
+ return ret;
+ }
+
+ usleep_range(10000, 12000);
+
+ ret = reset_control_assert(res->axi_m_sticky_reset);
+ if (ret) {
+ dev_err(dev, "cannot assert axi master sticky reset\n");
+ return ret;
+ }
+
+ ret = reset_control_assert(res->pwr_reset);
+ if (ret) {
+ dev_err(dev, "cannot assert power reset\n");
+ return ret;
+ }
+
+ ret = reset_control_assert(res->ahb_reset);
+ if (ret) {
+ dev_err(dev, "cannot assert ahb reset\n");
+ return ret;
+ }
+
+ usleep_range(10000, 12000);
+
+ ret = reset_control_deassert(res->phy_ahb_reset);
+ if (ret) {
+ dev_err(dev, "cannot deassert phy ahb reset\n");
+ return ret;
+ }
+
+ ret = reset_control_deassert(res->phy_reset);
+ if (ret) {
+ dev_err(dev, "cannot deassert phy reset\n");
+ goto err_rst_phy;
+ }
+
+ ret = reset_control_deassert(res->pipe_reset);
+ if (ret) {
+ dev_err(dev, "cannot deassert pipe reset\n");
+ goto err_rst_pipe;
+ }
+
+ ret = reset_control_deassert(res->pipe_sticky_reset);
+ if (ret) {
+ dev_err(dev, "cannot deassert pipe sticky reset\n");
+ goto err_rst_pipe_sticky;
+ }
+
+ usleep_range(10000, 12000);
+
+ ret = reset_control_deassert(res->axi_m_reset);
+ if (ret) {
+ dev_err(dev, "cannot deassert axi master reset\n");
+ goto err_rst_axi_m;
+ }
+
+ ret = reset_control_deassert(res->axi_m_sticky_reset);
+ if (ret) {
+ dev_err(dev, "cannot deassert axi master sticky reset\n");
+ goto err_rst_axi_m_sticky;
+ }
+
+ ret = reset_control_deassert(res->axi_s_reset);
+ if (ret) {
+ dev_err(dev, "cannot deassert axi slave reset\n");
+ goto err_rst_axi_s;
+ }
+
+ ret = reset_control_deassert(res->pwr_reset);
+ if (ret) {
+ dev_err(dev, "cannot deassert power reset\n");
+ goto err_rst_pwr;
+ }
+
+ ret = reset_control_deassert(res->ahb_reset);
+ if (ret) {
+ dev_err(dev, "cannot deassert ahb reset\n");
+ goto err_rst_ahb;
+ }
+
+ usleep_range(10000, 12000);
+
+ ret = clk_prepare_enable(res->aux_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable iface clock\n");
+ goto err_clk_aux;
+ }
+
+ ret = clk_prepare_enable(res->master_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable core clock\n");
+ goto err_clk_axi_m;
+ }
+
+ ret = clk_prepare_enable(res->slave_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable phy clock\n");
+ goto err_clk_axi_s;
+ }
+
+ /* enable PCIe clocks and resets */
+ val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
+ val &= ~BIT(0);
+ writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
+
+ /* change DBI base address */
+ writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
+
+ /* MAC PHY_POWERDOWN MUX DISABLE */
+ val = readl(pcie->parf + PCIE20_PARF_SYS_CTRL);
+ val &= ~BIT(29);
+ writel(val, pcie->parf + PCIE20_PARF_SYS_CTRL);
+
+ val = readl(pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
+ val |= BIT(4);
+ writel(val, pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
+
+ val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
+ val |= BIT(31);
+ writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
+
+ return 0;
+
+err_clk_axi_s:
+ clk_disable_unprepare(res->master_clk);
+err_clk_axi_m:
+ clk_disable_unprepare(res->aux_clk);
+err_clk_aux:
+ reset_control_assert(res->ahb_reset);
+err_rst_ahb:
+ reset_control_assert(res->pwr_reset);
+err_rst_pwr:
+ reset_control_assert(res->axi_s_reset);
+err_rst_axi_s:
+ reset_control_assert(res->axi_m_sticky_reset);
+err_rst_axi_m_sticky:
+ reset_control_assert(res->axi_m_reset);
+err_rst_axi_m:
+ reset_control_assert(res->pipe_sticky_reset);
+err_rst_pipe_sticky:
+ reset_control_assert(res->pipe_reset);
+err_rst_pipe:
+ reset_control_assert(res->phy_reset);
+err_rst_phy:
+ reset_control_assert(res->phy_ahb_reset);
+ return ret;
+}
+
+static int qcom_pcie_get_resources_2_3_3(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->dev;
+ int i;
+ const char *rst_names[] = { "axi_m", "axi_s", "pipe",
+ "axi_m_sticky", "sticky",
+ "ahb", "sleep", };
+
+ res->iface = devm_clk_get(dev, "iface");
+ if (IS_ERR(res->iface))
+ return PTR_ERR(res->iface);
+
+ res->axi_m_clk = devm_clk_get(dev, "axi_m");
+ if (IS_ERR(res->axi_m_clk))
+ return PTR_ERR(res->axi_m_clk);
+
+ res->axi_s_clk = devm_clk_get(dev, "axi_s");
+ if (IS_ERR(res->axi_s_clk))
+ return PTR_ERR(res->axi_s_clk);
+
+ res->ahb_clk = devm_clk_get(dev, "ahb");
+ if (IS_ERR(res->ahb_clk))
+ return PTR_ERR(res->ahb_clk);
+
+ res->aux_clk = devm_clk_get(dev, "aux");
+ if (IS_ERR(res->aux_clk))
+ return PTR_ERR(res->aux_clk);
+
+ for (i = 0; i < ARRAY_SIZE(rst_names); i++) {
+ res->rst[i] = devm_reset_control_get(dev, rst_names[i]);
+ if (IS_ERR(res->rst[i]))
+ return PTR_ERR(res->rst[i]);
+ }
+
+ return 0;
+}
+
+static void qcom_pcie_deinit_2_3_3(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
+
+ clk_disable_unprepare(res->iface);
+ clk_disable_unprepare(res->axi_m_clk);
+ clk_disable_unprepare(res->axi_s_clk);
+ clk_disable_unprepare(res->ahb_clk);
+ clk_disable_unprepare(res->aux_clk);
+}
+
+static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->dev;
+ int i, ret;
+ u32 val;
+
+ for (i = 0; i < ARRAY_SIZE(res->rst); i++) {
+ ret = reset_control_assert(res->rst[i]);
+ if (ret) {
+ dev_err(dev, "reset #%d assert failed (%d)\n", i, ret);
+ return ret;
+ }
+ }
+
+ usleep_range(2000, 2500);
+
+ for (i = 0; i < ARRAY_SIZE(res->rst); i++) {
+ ret = reset_control_deassert(res->rst[i]);
+ if (ret) {
+ dev_err(dev, "reset #%d deassert failed (%d)\n", i,
+ ret);
+ return ret;
+ }
+ }
+
+ /*
+ * Don't have a way to see if the reset has completed.
+ * Wait for some time.
+ */
+ usleep_range(2000, 2500);
+
+ ret = clk_prepare_enable(res->iface);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable core clock\n");
+ goto err_clk_iface;
+ }
+
+ ret = clk_prepare_enable(res->axi_m_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable core clock\n");
+ goto err_clk_axi_m;
+ }
+
+ ret = clk_prepare_enable(res->axi_s_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable axi slave clock\n");
+ goto err_clk_axi_s;
+ }
+
+ ret = clk_prepare_enable(res->ahb_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable ahb clock\n");
+ goto err_clk_ahb;
+ }
+
+ ret = clk_prepare_enable(res->aux_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable aux clock\n");
+ goto err_clk_aux;
+ }
+
+ writel(SLV_ADDR_SPACE_SZ,
+ pcie->parf + PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE);
+
+ val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
+ val &= ~BIT(0);
+ writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
+
+ writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
+
+ writel(MST_WAKEUP_EN | SLV_WAKEUP_EN | MSTR_ACLK_CGC_DIS
+ | SLV_ACLK_CGC_DIS | CORE_CLK_CGC_DIS |
+ AUX_PWR_DET | L23_CLK_RMV_DIS | L1_CLK_RMV_DIS,
+ pcie->parf + PCIE20_PARF_SYS_CTRL);
+ writel(0, pcie->parf + PCIE20_PARF_Q2A_FLUSH);
+
+ writel(CMD_BME_VAL, pci->dbi_base + PCIE20_COMMAND_STATUS);
+ writel(DBI_RO_WR_EN, pci->dbi_base + PCIE20_MISC_CONTROL_1_REG);
+ writel(PCIE_CAP_LINK1_VAL, pci->dbi_base + PCIE20_CAP_LINK_1);
+
+ val = readl(pci->dbi_base + PCIE20_CAP_LINK_CAPABILITIES);
+ val &= ~PCIE20_CAP_ACTIVE_STATE_LINK_PM_SUPPORT;
+ writel(val, pci->dbi_base + PCIE20_CAP_LINK_CAPABILITIES);
+
+ writel(PCIE_CAP_CPL_TIMEOUT_DISABLE, pci->dbi_base +
+ PCIE20_DEVICE_CONTROL2_STATUS2);
+
+ return 0;
+
+err_clk_aux:
+ clk_disable_unprepare(res->ahb_clk);
+err_clk_ahb:
+ clk_disable_unprepare(res->axi_s_clk);
+err_clk_axi_s:
+ clk_disable_unprepare(res->axi_m_clk);
+err_clk_axi_m:
+ clk_disable_unprepare(res->iface);
+err_clk_iface:
+ /*
+ * Not checking for failure, will anyway return
+ * the original failure in 'ret'.
+ */
+ for (i = 0; i < ARRAY_SIZE(res->rst); i++)
+ reset_control_assert(res->rst[i]);
+
+ return ret;
+}
+
+static int qcom_pcie_link_up(struct dw_pcie *pci)
+{
+ u16 val = readw(pci->dbi_base + PCIE20_CAP + PCI_EXP_LNKSTA);
+
+ return !!(val & PCI_EXP_LNKSTA_DLLLA);
+}
+
+static int qcom_pcie_host_init(struct pcie_port *pp)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct qcom_pcie *pcie = to_qcom_pcie(pci);
+ int ret;
+
+ qcom_ep_reset_assert(pcie);
+
+ ret = pcie->ops->init(pcie);
+ if (ret)
+ return ret;
+
+ ret = phy_power_on(pcie->phy);
+ if (ret)
+ goto err_deinit;
+
+ if (pcie->ops->post_init) {
+ ret = pcie->ops->post_init(pcie);
+ if (ret)
+ goto err_disable_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_establish_link(pcie);
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ qcom_ep_reset_assert(pcie);
+ if (pcie->ops->post_deinit)
+ pcie->ops->post_deinit(pcie);
+err_disable_phy:
+ phy_power_off(pcie->phy);
+err_deinit:
+ pcie->ops->deinit(pcie);
+
+ return ret;
+}
+
+static int qcom_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
+ u32 *val)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+
+ /* the device class is not reported correctly from the register */
+ if (where == PCI_CLASS_REVISION && size == 4) {
+ *val = readl(pci->dbi_base + PCI_CLASS_REVISION);
+ *val &= 0xff; /* keep revision id */
+ *val |= PCI_CLASS_BRIDGE_PCI << 16;
+ return PCIBIOS_SUCCESSFUL;
+ }
+
+ return dw_pcie_read(pci->dbi_base + where, size, val);
+}
+
+static const struct dw_pcie_host_ops qcom_pcie_dw_ops = {
+ .host_init = qcom_pcie_host_init,
+ .rd_own_conf = qcom_pcie_rd_own_conf,
+};
+
+/* Qcom IP rev.: 2.1.0 Synopsys IP rev.: 4.01a */
+static const struct qcom_pcie_ops ops_2_1_0 = {
+ .get_resources = qcom_pcie_get_resources_2_1_0,
+ .init = qcom_pcie_init_2_1_0,
+ .deinit = qcom_pcie_deinit_2_1_0,
+ .ltssm_enable = qcom_pcie_2_1_0_ltssm_enable,
+};
+
+/* Qcom IP rev.: 1.0.0 Synopsys IP rev.: 4.11a */
+static const struct qcom_pcie_ops ops_1_0_0 = {
+ .get_resources = qcom_pcie_get_resources_1_0_0,
+ .init = qcom_pcie_init_1_0_0,
+ .deinit = qcom_pcie_deinit_1_0_0,
+ .ltssm_enable = qcom_pcie_2_1_0_ltssm_enable,
+};
+
+/* Qcom IP rev.: 2.3.2 Synopsys IP rev.: 4.21a */
+static const struct qcom_pcie_ops ops_2_3_2 = {
+ .get_resources = qcom_pcie_get_resources_2_3_2,
+ .init = qcom_pcie_init_2_3_2,
+ .post_init = qcom_pcie_post_init_2_3_2,
+ .deinit = qcom_pcie_deinit_2_3_2,
+ .post_deinit = qcom_pcie_post_deinit_2_3_2,
+ .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
+};
+
+/* Qcom IP rev.: 2.4.0 Synopsys IP rev.: 4.20a */
+static const struct qcom_pcie_ops ops_2_4_0 = {
+ .get_resources = qcom_pcie_get_resources_2_4_0,
+ .init = qcom_pcie_init_2_4_0,
+ .deinit = qcom_pcie_deinit_2_4_0,
+ .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
+};
+
+/* Qcom IP rev.: 2.3.3 Synopsys IP rev.: 4.30a */
+static const struct qcom_pcie_ops ops_2_3_3 = {
+ .get_resources = qcom_pcie_get_resources_2_3_3,
+ .init = qcom_pcie_init_2_3_3,
+ .deinit = qcom_pcie_deinit_2_3_3,
+ .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
+};
+
+static const struct dw_pcie_ops dw_pcie_ops = {
+ .link_up = qcom_pcie_link_up,
+};
+
+static int qcom_pcie_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ struct pcie_port *pp;
+ struct dw_pcie *pci;
+ struct qcom_pcie *pcie;
+ int ret;
+
+ pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
+ if (!pcie)
+ return -ENOMEM;
+
+ pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
+ if (!pci)
+ return -ENOMEM;
+
+ pm_runtime_enable(dev);
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0) {
+ pm_runtime_disable(dev);
+ return ret;
+ }
+
+ pci->dev = dev;
+ pci->ops = &dw_pcie_ops;
+ pp = &pci->pp;
+
+ pcie->pci = pci;
+
+ pcie->ops = of_device_get_match_data(dev);
+
+ pcie->reset = devm_gpiod_get_optional(dev, "perst", GPIOD_OUT_HIGH);
+ if (IS_ERR(pcie->reset)) {
+ ret = PTR_ERR(pcie->reset);
+ goto err_pm_runtime_put;
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "parf");
+ pcie->parf = devm_ioremap_resource(dev, res);
+ if (IS_ERR(pcie->parf)) {
+ ret = PTR_ERR(pcie->parf);
+ goto err_pm_runtime_put;
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
+ pci->dbi_base = devm_pci_remap_cfg_resource(dev, res);
+ if (IS_ERR(pci->dbi_base)) {
+ ret = PTR_ERR(pci->dbi_base);
+ goto err_pm_runtime_put;
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "elbi");
+ pcie->elbi = devm_ioremap_resource(dev, res);
+ if (IS_ERR(pcie->elbi)) {
+ ret = PTR_ERR(pcie->elbi);
+ goto err_pm_runtime_put;
+ }
+
+ pcie->phy = devm_phy_optional_get(dev, "pciephy");
+ if (IS_ERR(pcie->phy)) {
+ ret = PTR_ERR(pcie->phy);
+ goto err_pm_runtime_put;
+ }
+
+ ret = pcie->ops->get_resources(pcie);
+ if (ret)
+ goto err_pm_runtime_put;
+
+ pp->ops = &qcom_pcie_dw_ops;
+
+ if (IS_ENABLED(CONFIG_PCI_MSI)) {
+ pp->msi_irq = platform_get_irq_byname(pdev, "msi");
+ if (pp->msi_irq < 0) {
+ ret = pp->msi_irq;
+ goto err_pm_runtime_put;
+ }
+ }
+
+ ret = phy_init(pcie->phy);
+ if (ret)
+ goto err_pm_runtime_put;
+
+ platform_set_drvdata(pdev, pcie);
+
+ ret = dw_pcie_host_init(pp);
+ if (ret) {
+ dev_err(dev, "cannot initialize host\n");
+ goto err_phy_exit;
+ }
+
+ return 0;
+
+err_phy_exit:
+ phy_exit(pcie->phy);
+err_pm_runtime_put:
+ pm_runtime_put(dev);
+ pm_runtime_disable(dev);
+
+ return ret;
+}
+
+static const struct of_device_id qcom_pcie_match[] = {
+ { .compatible = "qcom,pcie-apq8084", .data = &ops_1_0_0 },
+ { .compatible = "qcom,pcie-ipq8064", .data = &ops_2_1_0 },
+ { .compatible = "qcom,pcie-apq8064", .data = &ops_2_1_0 },
+ { .compatible = "qcom,pcie-msm8996", .data = &ops_2_3_2 },
+ { .compatible = "qcom,pcie-ipq8074", .data = &ops_2_3_3 },
+ { .compatible = "qcom,pcie-ipq4019", .data = &ops_2_4_0 },
+ { }
+};
+
+static struct platform_driver qcom_pcie_driver = {
+ .probe = qcom_pcie_probe,
+ .driver = {
+ .name = "qcom-pcie",
+ .suppress_bind_attrs = true,
+ .of_match_table = qcom_pcie_match,
+ },
+};
+builtin_platform_driver(qcom_pcie_driver);