| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Manivannan Sadhasivam | 2319 | 28.01% | 31 | 26.05% |
| Stanimir Varbanov | 1750 | 21.14% | 1 | 0.84% |
| Björn Andersson | 770 | 9.30% | 10 | 8.40% |
| Johan Hovold | 562 | 6.79% | 13 | 10.92% |
| Srinivas Kandagatla | 553 | 6.68% | 5 | 4.20% |
| Varadarajan Narayanan | 532 | 6.43% | 2 | 1.68% |
| Ansuel Smith | 355 | 4.29% | 10 | 8.40% |
| Selvam Sathappan Periakaruppan | 251 | 3.03% | 1 | 0.84% |
| John Crispin | 216 | 2.61% | 1 | 0.84% |
| Robert Marko | 175 | 2.11% | 3 | 2.52% |
| Dmitry Eremin-Solenikov | 167 | 2.02% | 6 | 5.04% |
| Prasad Malisetty | 131 | 1.58% | 2 | 1.68% |
| Björn Helgaas | 129 | 1.56% | 4 | 3.36% |
| Kishon Vijay Abraham I | 124 | 1.50% | 2 | 1.68% |
| Marc Gonzalez | 72 | 0.87% | 1 | 0.84% |
| Abel Vesa | 48 | 0.58% | 2 | 1.68% |
| Rob Herring | 35 | 0.42% | 3 | 2.52% |
| Krishna chaitanya chundru | 14 | 0.17% | 1 | 0.84% |
| Bhupesh Sharma | 11 | 0.13% | 1 | 0.84% |
| Baruch Siach | 8 | 0.10% | 1 | 0.84% |
| Paul Gortmaker | 7 | 0.08% | 1 | 0.84% |
| Abhishek Sahu | 7 | 0.08% | 1 | 0.84% |
| Niklas Cassel | 6 | 0.07% | 1 | 0.84% |
| Dejin Zheng | 6 | 0.07% | 1 | 0.84% |
| Sham Muthayyan | 5 | 0.06% | 1 | 0.84% |
| Guenter Roeck | 4 | 0.05% | 1 | 0.84% |
| Pratyush Anand | 4 | 0.05% | 1 | 0.84% |
| Dinghao Liu | 3 | 0.04% | 1 | 0.84% |
| Yoshihiro Shimoda | 3 | 0.04% | 1 | 0.84% |
| Fabio Estevam | 2 | 0.02% | 1 | 0.84% |
| Julia Lawall | 2 | 0.02% | 1 | 0.84% |
| Serge Semin | 1 | 0.01% | 1 | 0.84% |
| Sricharan Ramabadhran | 1 | 0.01% | 1 | 0.84% |
| JiSheng Zhang | 1 | 0.01% | 1 | 0.84% |
| Arnd Bergmann | 1 | 0.01% | 1 | 0.84% |
| Philipp Zabel | 1 | 0.01% | 1 | 0.84% |
| Pali Rohár | 1 | 0.01% | 1 | 0.84% |
| Mrinmay Sarkar | 1 | 0.01% | 1 | 0.84% |
| Joao Pinto | 1 | 0.01% | 1 | 0.84% |
| Total | 8279 | 119 |
// 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/crc8.h> #include <linux/debugfs.h> #include <linux/delay.h> #include <linux/gpio/consumer.h> #include <linux/interconnect.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/iopoll.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/of.h> #include <linux/of_gpio.h> #include <linux/pci.h> #include <linux/pm_runtime.h> #include <linux/platform_device.h> #include <linux/phy/pcie.h> #include <linux/phy/phy.h> #include <linux/regulator/consumer.h> #include <linux/reset.h> #include <linux/slab.h> #include <linux/types.h> #include "../../pci.h" #include "pcie-designware.h" /* PARF registers */ #define PARF_SYS_CTRL 0x00 #define PARF_PM_CTRL 0x20 #define PARF_PCS_DEEMPH 0x34 #define PARF_PCS_SWING 0x38 #define PARF_PHY_CTRL 0x40 #define PARF_PHY_REFCLK 0x4c #define PARF_CONFIG_BITS 0x50 #define PARF_DBI_BASE_ADDR 0x168 #define PARF_MHI_CLOCK_RESET_CTRL 0x174 #define PARF_AXI_MSTR_WR_ADDR_HALT 0x178 #define PARF_AXI_MSTR_WR_ADDR_HALT_V2 0x1a8 #define PARF_Q2A_FLUSH 0x1ac #define PARF_LTSSM 0x1b0 #define PARF_SID_OFFSET 0x234 #define PARF_BDF_TRANSLATE_CFG 0x24c #define PARF_SLV_ADDR_SPACE_SIZE 0x358 #define PARF_DEVICE_TYPE 0x1000 #define PARF_BDF_TO_SID_TABLE_N 0x2000 #define PARF_BDF_TO_SID_CFG 0x2c00 /* ELBI registers */ #define ELBI_SYS_CTRL 0x04 /* DBI registers */ #define AXI_MSTR_RESP_COMP_CTRL0 0x818 #define AXI_MSTR_RESP_COMP_CTRL1 0x81c /* MHI registers */ #define PARF_DEBUG_CNT_PM_LINKST_IN_L2 0xc04 #define PARF_DEBUG_CNT_PM_LINKST_IN_L1 0xc0c #define PARF_DEBUG_CNT_PM_LINKST_IN_L0S 0xc10 #define PARF_DEBUG_CNT_AUX_CLK_IN_L1SUB_L1 0xc84 #define PARF_DEBUG_CNT_AUX_CLK_IN_L1SUB_L2 0xc88 /* PARF_SYS_CTRL register fields */ #define MAC_PHY_POWERDOWN_IN_P2_D_MUX_EN BIT(29) #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) /* PARF_PM_CTRL register fields */ #define REQ_NOT_ENTR_L1 BIT(5) /* PARF_PCS_DEEMPH register fields */ #define PCS_DEEMPH_TX_DEEMPH_GEN1(x) FIELD_PREP(GENMASK(21, 16), x) #define PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(x) FIELD_PREP(GENMASK(13, 8), x) #define PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(x) FIELD_PREP(GENMASK(5, 0), x) /* PARF_PCS_SWING register fields */ #define PCS_SWING_TX_SWING_FULL(x) FIELD_PREP(GENMASK(14, 8), x) #define PCS_SWING_TX_SWING_LOW(x) FIELD_PREP(GENMASK(6, 0), x) /* PARF_PHY_CTRL register fields */ #define PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK GENMASK(20, 16) #define PHY_CTRL_PHY_TX0_TERM_OFFSET(x) FIELD_PREP(PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK, x) #define PHY_TEST_PWR_DOWN BIT(0) /* PARF_PHY_REFCLK register fields */ #define PHY_REFCLK_SSP_EN BIT(16) #define PHY_REFCLK_USE_PAD BIT(12) /* PARF_CONFIG_BITS register fields */ #define PHY_RX0_EQ(x) FIELD_PREP(GENMASK(26, 24), x) /* PARF_SLV_ADDR_SPACE_SIZE register value */ #define SLV_ADDR_SPACE_SZ 0x10000000 /* PARF_MHI_CLOCK_RESET_CTRL register fields */ #define AHB_CLK_EN BIT(0) #define MSTR_AXI_CLK_EN BIT(1) #define BYPASS BIT(4) /* PARF_AXI_MSTR_WR_ADDR_HALT register fields */ #define EN BIT(31) /* PARF_LTSSM register fields */ #define LTSSM_EN BIT(8) /* PARF_DEVICE_TYPE register fields */ #define DEVICE_TYPE_RC 0x4 /* PARF_BDF_TO_SID_CFG fields */ #define BDF_TO_SID_BYPASS BIT(0) /* ELBI_SYS_CTRL register fields */ #define ELBI_SYS_CTRL_LT_ENABLE BIT(0) /* AXI_MSTR_RESP_COMP_CTRL0 register fields */ #define CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K 0x4 #define CFG_REMOTE_RD_REQ_BRIDGE_SIZE_4K 0x5 /* AXI_MSTR_RESP_COMP_CTRL1 register fields */ #define CFG_BRIDGE_SB_INIT BIT(0) /* PCI_EXP_SLTCAP register fields */ #define PCIE_CAP_SLOT_POWER_LIMIT_VAL FIELD_PREP(PCI_EXP_SLTCAP_SPLV, 250) #define PCIE_CAP_SLOT_POWER_LIMIT_SCALE FIELD_PREP(PCI_EXP_SLTCAP_SPLS, 1) #define PCIE_CAP_SLOT_VAL (PCI_EXP_SLTCAP_ABP | \ PCI_EXP_SLTCAP_PCP | \ PCI_EXP_SLTCAP_MRLSP | \ PCI_EXP_SLTCAP_AIP | \ PCI_EXP_SLTCAP_PIP | \ PCI_EXP_SLTCAP_HPS | \ PCI_EXP_SLTCAP_EIP | \ PCIE_CAP_SLOT_POWER_LIMIT_VAL | \ PCIE_CAP_SLOT_POWER_LIMIT_SCALE) #define PERST_DELAY_US 1000 #define QCOM_PCIE_CRC8_POLYNOMIAL (BIT(2) | BIT(1) | BIT(0)) #define QCOM_PCIE_LINK_SPEED_TO_BW(speed) \ Mbps_to_icc(PCIE_SPEED2MBS_ENC(pcie_link_speed[speed])) #define QCOM_PCIE_1_0_0_MAX_CLOCKS 4 struct qcom_pcie_resources_1_0_0 { struct clk_bulk_data clks[QCOM_PCIE_1_0_0_MAX_CLOCKS]; struct reset_control *core; struct regulator *vdda; }; #define QCOM_PCIE_2_1_0_MAX_CLOCKS 5 #define QCOM_PCIE_2_1_0_MAX_RESETS 6 #define QCOM_PCIE_2_1_0_MAX_SUPPLY 3 struct qcom_pcie_resources_2_1_0 { struct clk_bulk_data clks[QCOM_PCIE_2_1_0_MAX_CLOCKS]; struct reset_control_bulk_data resets[QCOM_PCIE_2_1_0_MAX_RESETS]; int num_resets; struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY]; }; #define QCOM_PCIE_2_3_2_MAX_CLOCKS 4 #define QCOM_PCIE_2_3_2_MAX_SUPPLY 2 struct qcom_pcie_resources_2_3_2 { struct clk_bulk_data clks[QCOM_PCIE_2_3_2_MAX_CLOCKS]; struct regulator_bulk_data supplies[QCOM_PCIE_2_3_2_MAX_SUPPLY]; }; #define QCOM_PCIE_2_3_3_MAX_CLOCKS 5 #define QCOM_PCIE_2_3_3_MAX_RESETS 7 struct qcom_pcie_resources_2_3_3 { struct clk_bulk_data clks[QCOM_PCIE_2_3_3_MAX_CLOCKS]; struct reset_control_bulk_data rst[QCOM_PCIE_2_3_3_MAX_RESETS]; }; #define QCOM_PCIE_2_4_0_MAX_CLOCKS 4 #define QCOM_PCIE_2_4_0_MAX_RESETS 12 struct qcom_pcie_resources_2_4_0 { struct clk_bulk_data clks[QCOM_PCIE_2_4_0_MAX_CLOCKS]; int num_clks; struct reset_control_bulk_data resets[QCOM_PCIE_2_4_0_MAX_RESETS]; int num_resets; }; #define QCOM_PCIE_2_7_0_MAX_CLOCKS 15 #define QCOM_PCIE_2_7_0_MAX_SUPPLIES 2 struct qcom_pcie_resources_2_7_0 { struct clk_bulk_data clks[QCOM_PCIE_2_7_0_MAX_CLOCKS]; int num_clks; struct regulator_bulk_data supplies[QCOM_PCIE_2_7_0_MAX_SUPPLIES]; struct reset_control *rst; }; #define QCOM_PCIE_2_9_0_MAX_CLOCKS 5 struct qcom_pcie_resources_2_9_0 { struct clk_bulk_data clks[QCOM_PCIE_2_9_0_MAX_CLOCKS]; struct reset_control *rst; }; 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_resources_2_7_0 v2_7_0; struct qcom_pcie_resources_2_9_0 v2_9_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 (*host_post_init)(struct qcom_pcie *pcie); void (*deinit)(struct qcom_pcie *pcie); void (*ltssm_enable)(struct qcom_pcie *pcie); int (*config_sid)(struct qcom_pcie *pcie); }; struct qcom_pcie_cfg { const struct qcom_pcie_ops *ops; bool no_l0s; }; struct qcom_pcie { struct dw_pcie *pci; void __iomem *parf; /* DT parf */ void __iomem *elbi; /* DT elbi */ void __iomem *mhi; union qcom_pcie_resources res; struct phy *phy; struct gpio_desc *reset; struct icc_path *icc_mem; const struct qcom_pcie_cfg *cfg; struct dentry *debugfs; bool suspended; }; #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_start_link(struct dw_pcie *pci) { struct qcom_pcie *pcie = to_qcom_pcie(pci); /* Enable Link Training state machine */ if (pcie->cfg->ops->ltssm_enable) pcie->cfg->ops->ltssm_enable(pcie); return 0; } static void qcom_pcie_clear_aspm_l0s(struct dw_pcie *pci) { struct qcom_pcie *pcie = to_qcom_pcie(pci); u16 offset; u32 val; if (!pcie->cfg->no_l0s) return; offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); dw_pcie_dbi_ro_wr_en(pci); val = readl(pci->dbi_base + offset + PCI_EXP_LNKCAP); val &= ~PCI_EXP_LNKCAP_ASPM_L0S; writel(val, pci->dbi_base + offset + PCI_EXP_LNKCAP); dw_pcie_dbi_ro_wr_dis(pci); } static void qcom_pcie_clear_hpc(struct dw_pcie *pci) { u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); u32 val; dw_pcie_dbi_ro_wr_en(pci); val = readl(pci->dbi_base + offset + PCI_EXP_SLTCAP); val &= ~PCI_EXP_SLTCAP_HPC; writel(val, pci->dbi_base + offset + PCI_EXP_SLTCAP); dw_pcie_dbi_ro_wr_dis(pci); } static void qcom_pcie_2_1_0_ltssm_enable(struct qcom_pcie *pcie) { u32 val; /* enable link training */ val = readl(pcie->elbi + ELBI_SYS_CTRL); val |= ELBI_SYS_CTRL_LT_ENABLE; writel(val, pcie->elbi + 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; bool is_apq = of_device_is_compatible(dev->of_node, "qcom,pcie-apq8064"); 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->clks[0].id = "iface"; res->clks[1].id = "core"; res->clks[2].id = "phy"; res->clks[3].id = "aux"; res->clks[4].id = "ref"; /* iface, core, phy are required */ ret = devm_clk_bulk_get(dev, 3, res->clks); if (ret < 0) return ret; /* aux, ref are optional */ ret = devm_clk_bulk_get_optional(dev, 2, res->clks + 3); if (ret < 0) return ret; res->resets[0].id = "pci"; res->resets[1].id = "axi"; res->resets[2].id = "ahb"; res->resets[3].id = "por"; res->resets[4].id = "phy"; res->resets[5].id = "ext"; /* ext is optional on APQ8016 */ res->num_resets = is_apq ? 5 : 6; ret = devm_reset_control_bulk_get_exclusive(dev, res->num_resets, res->resets); if (ret < 0) return ret; return 0; } 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; clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks); reset_control_bulk_assert(res->num_resets, res->resets); writel(1, pcie->parf + PARF_PHY_CTRL); 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; int ret; /* reset the PCIe interface as uboot can leave it undefined state */ ret = reset_control_bulk_assert(res->num_resets, res->resets); if (ret < 0) { dev_err(dev, "cannot assert resets\n"); return 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_bulk_deassert(res->num_resets, res->resets); if (ret < 0) { dev_err(dev, "cannot deassert resets\n"); regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies); return ret; } return 0; } static int qcom_pcie_post_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; /* enable PCIe clocks and resets */ val = readl(pcie->parf + PARF_PHY_CTRL); val &= ~PHY_TEST_PWR_DOWN; writel(val, pcie->parf + PARF_PHY_CTRL); ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks); if (ret) return ret; if (of_device_is_compatible(node, "qcom,pcie-ipq8064") || of_device_is_compatible(node, "qcom,pcie-ipq8064-v2")) { writel(PCS_DEEMPH_TX_DEEMPH_GEN1(24) | PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(24) | PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(34), pcie->parf + PARF_PCS_DEEMPH); writel(PCS_SWING_TX_SWING_FULL(120) | PCS_SWING_TX_SWING_LOW(120), pcie->parf + PARF_PCS_SWING); writel(PHY_RX0_EQ(4), pcie->parf + PARF_CONFIG_BITS); } if (of_device_is_compatible(node, "qcom,pcie-ipq8064")) { /* set TX termination offset */ val = readl(pcie->parf + PARF_PHY_CTRL); val &= ~PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK; val |= PHY_CTRL_PHY_TX0_TERM_OFFSET(7); writel(val, pcie->parf + PARF_PHY_CTRL); } /* enable external reference clock */ val = readl(pcie->parf + 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 + PARF_PHY_REFCLK); /* 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 + AXI_MSTR_RESP_COMP_CTRL0); writel(CFG_BRIDGE_SB_INIT, pci->dbi_base + AXI_MSTR_RESP_COMP_CTRL1); qcom_pcie_clear_hpc(pcie->pci); return 0; } 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; int ret; res->vdda = devm_regulator_get(dev, "vdda"); if (IS_ERR(res->vdda)) return PTR_ERR(res->vdda); res->clks[0].id = "iface"; res->clks[1].id = "aux"; res->clks[2].id = "master_bus"; res->clks[3].id = "slave_bus"; ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks); if (ret < 0) return ret; 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_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks); 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_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks); if (ret) { dev_err(dev, "cannot prepare/enable clocks\n"); goto err_assert_reset; } ret = regulator_enable(res->vdda); if (ret) { dev_err(dev, "cannot enable vdda regulator\n"); goto err_disable_clks; } return 0; err_disable_clks: clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks); err_assert_reset: reset_control_assert(res->core); return ret; } static int qcom_pcie_post_init_1_0_0(struct qcom_pcie *pcie) { /* change DBI base address */ writel(0, pcie->parf + PARF_DBI_BASE_ADDR); if (IS_ENABLED(CONFIG_PCI_MSI)) { u32 val = readl(pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT); val |= EN; writel(val, pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT); } qcom_pcie_clear_hpc(pcie->pci); return 0; } static void qcom_pcie_2_3_2_ltssm_enable(struct qcom_pcie *pcie) { u32 val; /* enable link training */ val = readl(pcie->parf + PARF_LTSSM); val |= LTSSM_EN; writel(val, pcie->parf + 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->clks[0].id = "aux"; res->clks[1].id = "cfg"; res->clks[2].id = "bus_master"; res->clks[3].id = "bus_slave"; ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks); if (ret < 0) return ret; return 0; } 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_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks); regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies); } 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; 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_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks); if (ret) { dev_err(dev, "cannot prepare/enable clocks\n"); regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies); return ret; } return 0; } static int qcom_pcie_post_init_2_3_2(struct qcom_pcie *pcie) { u32 val; /* enable PCIe clocks and resets */ val = readl(pcie->parf + PARF_PHY_CTRL); val &= ~PHY_TEST_PWR_DOWN; writel(val, pcie->parf + PARF_PHY_CTRL); /* change DBI base address */ writel(0, pcie->parf + PARF_DBI_BASE_ADDR); /* MAC PHY_POWERDOWN MUX DISABLE */ val = readl(pcie->parf + PARF_SYS_CTRL); val &= ~MAC_PHY_POWERDOWN_IN_P2_D_MUX_EN; writel(val, pcie->parf + PARF_SYS_CTRL); val = readl(pcie->parf + PARF_MHI_CLOCK_RESET_CTRL); val |= BYPASS; writel(val, pcie->parf + PARF_MHI_CLOCK_RESET_CTRL); val = readl(pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT_V2); val |= EN; writel(val, pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT_V2); qcom_pcie_clear_hpc(pcie->pci); 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; bool is_ipq = of_device_is_compatible(dev->of_node, "qcom,pcie-ipq4019"); int ret; res->clks[0].id = "aux"; res->clks[1].id = "master_bus"; res->clks[2].id = "slave_bus"; res->clks[3].id = "iface"; /* qcom,pcie-ipq4019 is defined without "iface" */ res->num_clks = is_ipq ? 3 : 4; ret = devm_clk_bulk_get(dev, res->num_clks, res->clks); if (ret < 0) return ret; res->resets[0].id = "axi_m"; res->resets[1].id = "axi_s"; res->resets[2].id = "axi_m_sticky"; res->resets[3].id = "pipe_sticky"; res->resets[4].id = "pwr"; res->resets[5].id = "ahb"; res->resets[6].id = "pipe"; res->resets[7].id = "axi_m_vmid"; res->resets[8].id = "axi_s_xpu"; res->resets[9].id = "parf"; res->resets[10].id = "phy"; res->resets[11].id = "phy_ahb"; res->num_resets = is_ipq ? 12 : 6; ret = devm_reset_control_bulk_get_exclusive(dev, res->num_resets, res->resets); if (ret < 0) return ret; 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_bulk_assert(res->num_resets, res->resets); clk_bulk_disable_unprepare(res->num_clks, res->clks); } 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; int ret; ret = reset_control_bulk_assert(res->num_resets, res->resets); if (ret < 0) { dev_err(dev, "cannot assert resets\n"); return ret; } usleep_range(10000, 12000); ret = reset_control_bulk_deassert(res->num_resets, res->resets); if (ret < 0) { dev_err(dev, "cannot deassert resets\n"); return ret; } usleep_range(10000, 12000); ret = clk_bulk_prepare_enable(res->num_clks, res->clks); if (ret) { reset_control_bulk_assert(res->num_resets, res->resets); return ret; } return 0; } 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 ret; res->clks[0].id = "iface"; res->clks[1].id = "axi_m"; res->clks[2].id = "axi_s"; res->clks[3].id = "ahb"; res->clks[4].id = "aux"; ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks); if (ret < 0) return ret; res->rst[0].id = "axi_m"; res->rst[1].id = "axi_s"; res->rst[2].id = "pipe"; res->rst[3].id = "axi_m_sticky"; res->rst[4].id = "sticky"; res->rst[5].id = "ahb"; res->rst[6].id = "sleep"; ret = devm_reset_control_bulk_get_exclusive(dev, ARRAY_SIZE(res->rst), res->rst); if (ret < 0) return ret; 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_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks); } 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 ret; ret = reset_control_bulk_assert(ARRAY_SIZE(res->rst), res->rst); if (ret < 0) { dev_err(dev, "cannot assert resets\n"); return ret; } usleep_range(2000, 2500); ret = reset_control_bulk_deassert(ARRAY_SIZE(res->rst), res->rst); if (ret < 0) { dev_err(dev, "cannot deassert resets\n"); return ret; } /* * Don't have a way to see if the reset has completed. * Wait for some time. */ usleep_range(2000, 2500); ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks); if (ret) { dev_err(dev, "cannot prepare/enable clocks\n"); goto err_assert_resets; } return 0; err_assert_resets: /* * Not checking for failure, will anyway return * the original failure in 'ret'. */ reset_control_bulk_assert(ARRAY_SIZE(res->rst), res->rst); return ret; } static int qcom_pcie_post_init_2_3_3(struct qcom_pcie *pcie) { struct dw_pcie *pci = pcie->pci; u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); u32 val; writel(SLV_ADDR_SPACE_SZ, pcie->parf + PARF_SLV_ADDR_SPACE_SIZE); val = readl(pcie->parf + PARF_PHY_CTRL); val &= ~PHY_TEST_PWR_DOWN; writel(val, pcie->parf + PARF_PHY_CTRL); writel(0, pcie->parf + 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 + PARF_SYS_CTRL); writel(0, pcie->parf + PARF_Q2A_FLUSH); writel(PCI_COMMAND_MASTER, pci->dbi_base + PCI_COMMAND); dw_pcie_dbi_ro_wr_en(pci); writel(PCIE_CAP_SLOT_VAL, pci->dbi_base + offset + PCI_EXP_SLTCAP); val = readl(pci->dbi_base + offset + PCI_EXP_LNKCAP); val &= ~PCI_EXP_LNKCAP_ASPMS; writel(val, pci->dbi_base + offset + PCI_EXP_LNKCAP); writel(PCI_EXP_DEVCTL2_COMP_TMOUT_DIS, pci->dbi_base + offset + PCI_EXP_DEVCTL2); dw_pcie_dbi_ro_wr_dis(pci); return 0; } static int qcom_pcie_get_resources_2_7_0(struct qcom_pcie *pcie) { struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0; struct dw_pcie *pci = pcie->pci; struct device *dev = pci->dev; unsigned int num_clks, num_opt_clks; unsigned int idx; int ret; res->rst = devm_reset_control_array_get_exclusive(dev); if (IS_ERR(res->rst)) return PTR_ERR(res->rst); 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; idx = 0; res->clks[idx++].id = "aux"; res->clks[idx++].id = "cfg"; res->clks[idx++].id = "bus_master"; res->clks[idx++].id = "bus_slave"; res->clks[idx++].id = "slave_q2a"; num_clks = idx; ret = devm_clk_bulk_get(dev, num_clks, res->clks); if (ret < 0) return ret; res->clks[idx++].id = "tbu"; res->clks[idx++].id = "ddrss_sf_tbu"; res->clks[idx++].id = "aggre0"; res->clks[idx++].id = "aggre1"; res->clks[idx++].id = "noc_aggr"; res->clks[idx++].id = "noc_aggr_4"; res->clks[idx++].id = "noc_aggr_south_sf"; res->clks[idx++].id = "cnoc_qx"; res->clks[idx++].id = "sleep"; res->clks[idx++].id = "cnoc_sf_axi"; num_opt_clks = idx - num_clks; res->num_clks = idx; ret = devm_clk_bulk_get_optional(dev, num_opt_clks, res->clks + num_clks); if (ret < 0) return ret; return 0; } static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie) { struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0; 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_bulk_prepare_enable(res->num_clks, res->clks); if (ret < 0) goto err_disable_regulators; ret = reset_control_assert(res->rst); if (ret) { dev_err(dev, "reset assert failed (%d)\n", ret); goto err_disable_clocks; } usleep_range(1000, 1500); ret = reset_control_deassert(res->rst); if (ret) { dev_err(dev, "reset deassert failed (%d)\n", ret); goto err_disable_clocks; } /* Wait for reset to complete, required on SM8450 */ usleep_range(1000, 1500); /* configure PCIe to RC mode */ writel(DEVICE_TYPE_RC, pcie->parf + PARF_DEVICE_TYPE); /* enable PCIe clocks and resets */ val = readl(pcie->parf + PARF_PHY_CTRL); val &= ~PHY_TEST_PWR_DOWN; writel(val, pcie->parf + PARF_PHY_CTRL); /* change DBI base address */ writel(0, pcie->parf + PARF_DBI_BASE_ADDR); /* MAC PHY_POWERDOWN MUX DISABLE */ val = readl(pcie->parf + PARF_SYS_CTRL); val &= ~MAC_PHY_POWERDOWN_IN_P2_D_MUX_EN; writel(val, pcie->parf + PARF_SYS_CTRL); val = readl(pcie->parf + PARF_MHI_CLOCK_RESET_CTRL); val |= BYPASS; writel(val, pcie->parf + PARF_MHI_CLOCK_RESET_CTRL); /* Enable L1 and L1SS */ val = readl(pcie->parf + PARF_PM_CTRL); val &= ~REQ_NOT_ENTR_L1; writel(val, pcie->parf + PARF_PM_CTRL); val = readl(pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT_V2); val |= EN; writel(val, pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT_V2); return 0; err_disable_clocks: clk_bulk_disable_unprepare(res->num_clks, res->clks); err_disable_regulators: regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies); return ret; } static int qcom_pcie_post_init_2_7_0(struct qcom_pcie *pcie) { qcom_pcie_clear_aspm_l0s(pcie->pci); qcom_pcie_clear_hpc(pcie->pci); return 0; } static int qcom_pcie_enable_aspm(struct pci_dev *pdev, void *userdata) { /* * Downstream devices need to be in D0 state before enabling PCI PM * substates. */ pci_set_power_state_locked(pdev, PCI_D0); pci_enable_link_state_locked(pdev, PCIE_LINK_STATE_ALL); return 0; } static void qcom_pcie_host_post_init_2_7_0(struct qcom_pcie *pcie) { struct dw_pcie_rp *pp = &pcie->pci->pp; pci_walk_bus(pp->bridge->bus, qcom_pcie_enable_aspm, NULL); } static void qcom_pcie_deinit_2_7_0(struct qcom_pcie *pcie) { struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0; clk_bulk_disable_unprepare(res->num_clks, res->clks); regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies); } static int qcom_pcie_config_sid_1_9_0(struct qcom_pcie *pcie) { /* iommu map structure */ struct { u32 bdf; u32 phandle; u32 smmu_sid; u32 smmu_sid_len; } *map; void __iomem *bdf_to_sid_base = pcie->parf + PARF_BDF_TO_SID_TABLE_N; struct device *dev = pcie->pci->dev; u8 qcom_pcie_crc8_table[CRC8_TABLE_SIZE]; int i, nr_map, size = 0; u32 smmu_sid_base; u32 val; of_get_property(dev->of_node, "iommu-map", &size); if (!size) return 0; /* Enable BDF to SID translation by disabling bypass mode (default) */ val = readl(pcie->parf + PARF_BDF_TO_SID_CFG); val &= ~BDF_TO_SID_BYPASS; writel(val, pcie->parf + PARF_BDF_TO_SID_CFG); map = kzalloc(size, GFP_KERNEL); if (!map) return -ENOMEM; of_property_read_u32_array(dev->of_node, "iommu-map", (u32 *)map, size / sizeof(u32)); nr_map = size / (sizeof(*map)); crc8_populate_msb(qcom_pcie_crc8_table, QCOM_PCIE_CRC8_POLYNOMIAL); /* Registers need to be zero out first */ memset_io(bdf_to_sid_base, 0, CRC8_TABLE_SIZE * sizeof(u32)); /* Extract the SMMU SID base from the first entry of iommu-map */ smmu_sid_base = map[0].smmu_sid; /* Look for an available entry to hold the mapping */ for (i = 0; i < nr_map; i++) { __be16 bdf_be = cpu_to_be16(map[i].bdf); u32 val; u8 hash; hash = crc8(qcom_pcie_crc8_table, (u8 *)&bdf_be, sizeof(bdf_be), 0); val = readl(bdf_to_sid_base + hash * sizeof(u32)); /* If the register is already populated, look for next available entry */ while (val) { u8 current_hash = hash++; u8 next_mask = 0xff; /* If NEXT field is NULL then update it with next hash */ if (!(val & next_mask)) { val |= (u32)hash; writel(val, bdf_to_sid_base + current_hash * sizeof(u32)); } val = readl(bdf_to_sid_base + hash * sizeof(u32)); } /* BDF [31:16] | SID [15:8] | NEXT [7:0] */ val = map[i].bdf << 16 | (map[i].smmu_sid - smmu_sid_base) << 8 | 0; writel(val, bdf_to_sid_base + hash * sizeof(u32)); } kfree(map); return 0; } static int qcom_pcie_get_resources_2_9_0(struct qcom_pcie *pcie) { struct qcom_pcie_resources_2_9_0 *res = &pcie->res.v2_9_0; struct dw_pcie *pci = pcie->pci; struct device *dev = pci->dev; int ret; res->clks[0].id = "iface"; res->clks[1].id = "axi_m"; res->clks[2].id = "axi_s"; res->clks[3].id = "axi_bridge"; res->clks[4].id = "rchng"; ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks); if (ret < 0) return ret; res->rst = devm_reset_control_array_get_exclusive(dev); if (IS_ERR(res->rst)) return PTR_ERR(res->rst); return 0; } static void qcom_pcie_deinit_2_9_0(struct qcom_pcie *pcie) { struct qcom_pcie_resources_2_9_0 *res = &pcie->res.v2_9_0; clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks); } static int qcom_pcie_init_2_9_0(struct qcom_pcie *pcie) { struct qcom_pcie_resources_2_9_0 *res = &pcie->res.v2_9_0; struct device *dev = pcie->pci->dev; int ret; ret = reset_control_assert(res->rst); if (ret) { dev_err(dev, "reset assert failed (%d)\n", ret); return ret; } /* * Delay periods before and after reset deassert are working values * from downstream Codeaurora kernel */ usleep_range(2000, 2500); ret = reset_control_deassert(res->rst); if (ret) { dev_err(dev, "reset deassert failed (%d)\n", ret); return ret; } usleep_range(2000, 2500); return clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks); } static int qcom_pcie_post_init_2_9_0(struct qcom_pcie *pcie) { struct dw_pcie *pci = pcie->pci; u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); u32 val; int i; writel(SLV_ADDR_SPACE_SZ, pcie->parf + PARF_SLV_ADDR_SPACE_SIZE); val = readl(pcie->parf + PARF_PHY_CTRL); val &= ~PHY_TEST_PWR_DOWN; writel(val, pcie->parf + PARF_PHY_CTRL); writel(0, pcie->parf + PARF_DBI_BASE_ADDR); writel(DEVICE_TYPE_RC, pcie->parf + PARF_DEVICE_TYPE); writel(BYPASS | MSTR_AXI_CLK_EN | AHB_CLK_EN, pcie->parf + PARF_MHI_CLOCK_RESET_CTRL); writel(GEN3_RELATED_OFF_RXEQ_RGRDLESS_RXTS | GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL, pci->dbi_base + GEN3_RELATED_OFF); 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 + PARF_SYS_CTRL); writel(0, pcie->parf + PARF_Q2A_FLUSH); dw_pcie_dbi_ro_wr_en(pci); writel(PCIE_CAP_SLOT_VAL, pci->dbi_base + offset + PCI_EXP_SLTCAP); val = readl(pci->dbi_base + offset + PCI_EXP_LNKCAP); val &= ~PCI_EXP_LNKCAP_ASPMS; writel(val, pci->dbi_base + offset + PCI_EXP_LNKCAP); writel(PCI_EXP_DEVCTL2_COMP_TMOUT_DIS, pci->dbi_base + offset + PCI_EXP_DEVCTL2); dw_pcie_dbi_ro_wr_dis(pci); for (i = 0; i < 256; i++) writel(0, pcie->parf + PARF_BDF_TO_SID_TABLE_N + (4 * i)); return 0; } static int qcom_pcie_link_up(struct dw_pcie *pci) { u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); u16 val = readw(pci->dbi_base + offset + PCI_EXP_LNKSTA); return !!(val & PCI_EXP_LNKSTA_DLLLA); } static int qcom_pcie_host_init(struct dw_pcie_rp *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->cfg->ops->init(pcie); if (ret) return ret; ret = phy_set_mode_ext(pcie->phy, PHY_MODE_PCIE, PHY_MODE_PCIE_RC); if (ret) goto err_deinit; ret = phy_power_on(pcie->phy); if (ret) goto err_deinit; if (pcie->cfg->ops->post_init) { ret = pcie->cfg->ops->post_init(pcie); if (ret) goto err_disable_phy; } qcom_ep_reset_deassert(pcie); if (pcie->cfg->ops->config_sid) { ret = pcie->cfg->ops->config_sid(pcie); if (ret) goto err_assert_reset; } return 0; err_assert_reset: qcom_ep_reset_assert(pcie); err_disable_phy: phy_power_off(pcie->phy); err_deinit: pcie->cfg->ops->deinit(pcie); return ret; } static void qcom_pcie_host_deinit(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct qcom_pcie *pcie = to_qcom_pcie(pci); qcom_ep_reset_assert(pcie); phy_power_off(pcie->phy); pcie->cfg->ops->deinit(pcie); } static void qcom_pcie_host_post_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct qcom_pcie *pcie = to_qcom_pcie(pci); if (pcie->cfg->ops->host_post_init) pcie->cfg->ops->host_post_init(pcie); } static const struct dw_pcie_host_ops qcom_pcie_dw_ops = { .init = qcom_pcie_host_init, .deinit = qcom_pcie_host_deinit, .post_init = qcom_pcie_host_post_init, }; /* 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, .post_init = qcom_pcie_post_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, .post_init = qcom_pcie_post_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, .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, .post_init = qcom_pcie_post_init_2_3_2, .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, .post_init = qcom_pcie_post_init_2_3_3, .deinit = qcom_pcie_deinit_2_3_3, .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable, }; /* Qcom IP rev.: 2.7.0 Synopsys IP rev.: 4.30a */ static const struct qcom_pcie_ops ops_2_7_0 = { .get_resources = qcom_pcie_get_resources_2_7_0, .init = qcom_pcie_init_2_7_0, .post_init = qcom_pcie_post_init_2_7_0, .deinit = qcom_pcie_deinit_2_7_0, .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable, }; /* Qcom IP rev.: 1.9.0 */ static const struct qcom_pcie_ops ops_1_9_0 = { .get_resources = qcom_pcie_get_resources_2_7_0, .init = qcom_pcie_init_2_7_0, .post_init = qcom_pcie_post_init_2_7_0, .host_post_init = qcom_pcie_host_post_init_2_7_0, .deinit = qcom_pcie_deinit_2_7_0, .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable, .config_sid = qcom_pcie_config_sid_1_9_0, }; /* Qcom IP rev.: 2.9.0 Synopsys IP rev.: 5.00a */ static const struct qcom_pcie_ops ops_2_9_0 = { .get_resources = qcom_pcie_get_resources_2_9_0, .init = qcom_pcie_init_2_9_0, .post_init = qcom_pcie_post_init_2_9_0, .deinit = qcom_pcie_deinit_2_9_0, .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable, }; static const struct qcom_pcie_cfg cfg_1_0_0 = { .ops = &ops_1_0_0, }; static const struct qcom_pcie_cfg cfg_1_9_0 = { .ops = &ops_1_9_0, }; static const struct qcom_pcie_cfg cfg_2_1_0 = { .ops = &ops_2_1_0, }; static const struct qcom_pcie_cfg cfg_2_3_2 = { .ops = &ops_2_3_2, }; static const struct qcom_pcie_cfg cfg_2_3_3 = { .ops = &ops_2_3_3, }; static const struct qcom_pcie_cfg cfg_2_4_0 = { .ops = &ops_2_4_0, }; static const struct qcom_pcie_cfg cfg_2_7_0 = { .ops = &ops_2_7_0, }; static const struct qcom_pcie_cfg cfg_2_9_0 = { .ops = &ops_2_9_0, }; static const struct qcom_pcie_cfg cfg_sc8280xp = { .ops = &ops_1_9_0, .no_l0s = true, }; static const struct dw_pcie_ops dw_pcie_ops = { .link_up = qcom_pcie_link_up, .start_link = qcom_pcie_start_link, }; static int qcom_pcie_icc_init(struct qcom_pcie *pcie) { struct dw_pcie *pci = pcie->pci; int ret; pcie->icc_mem = devm_of_icc_get(pci->dev, "pcie-mem"); if (IS_ERR(pcie->icc_mem)) return PTR_ERR(pcie->icc_mem); /* * Some Qualcomm platforms require interconnect bandwidth constraints * to be set before enabling interconnect clocks. * * Set an initial peak bandwidth corresponding to single-lane Gen 1 * for the pcie-mem path. */ ret = icc_set_bw(pcie->icc_mem, 0, QCOM_PCIE_LINK_SPEED_TO_BW(1)); if (ret) { dev_err(pci->dev, "failed to set interconnect bandwidth: %d\n", ret); return ret; } return 0; } static void qcom_pcie_icc_update(struct qcom_pcie *pcie) { struct dw_pcie *pci = pcie->pci; u32 offset, status; int speed, width; int ret; if (!pcie->icc_mem) return; offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); status = readw(pci->dbi_base + offset + PCI_EXP_LNKSTA); /* Only update constraints if link is up. */ if (!(status & PCI_EXP_LNKSTA_DLLLA)) return; speed = FIELD_GET(PCI_EXP_LNKSTA_CLS, status); width = FIELD_GET(PCI_EXP_LNKSTA_NLW, status); ret = icc_set_bw(pcie->icc_mem, 0, width * QCOM_PCIE_LINK_SPEED_TO_BW(speed)); if (ret) { dev_err(pci->dev, "failed to set interconnect bandwidth: %d\n", ret); } } static int qcom_pcie_link_transition_count(struct seq_file *s, void *data) { struct qcom_pcie *pcie = (struct qcom_pcie *)dev_get_drvdata(s->private); seq_printf(s, "L0s transition count: %u\n", readl_relaxed(pcie->mhi + PARF_DEBUG_CNT_PM_LINKST_IN_L0S)); seq_printf(s, "L1 transition count: %u\n", readl_relaxed(pcie->mhi + PARF_DEBUG_CNT_PM_LINKST_IN_L1)); seq_printf(s, "L1.1 transition count: %u\n", readl_relaxed(pcie->mhi + PARF_DEBUG_CNT_AUX_CLK_IN_L1SUB_L1)); seq_printf(s, "L1.2 transition count: %u\n", readl_relaxed(pcie->mhi + PARF_DEBUG_CNT_AUX_CLK_IN_L1SUB_L2)); seq_printf(s, "L2 transition count: %u\n", readl_relaxed(pcie->mhi + PARF_DEBUG_CNT_PM_LINKST_IN_L2)); return 0; } static void qcom_pcie_init_debugfs(struct qcom_pcie *pcie) { struct dw_pcie *pci = pcie->pci; struct device *dev = pci->dev; char *name; name = devm_kasprintf(dev, GFP_KERNEL, "%pOFP", dev->of_node); if (!name) return; pcie->debugfs = debugfs_create_dir(name, NULL); debugfs_create_devm_seqfile(dev, "link_transition_count", pcie->debugfs, qcom_pcie_link_transition_count); } static int qcom_pcie_probe(struct platform_device *pdev) { const struct qcom_pcie_cfg *pcie_cfg; struct device *dev = &pdev->dev; struct qcom_pcie *pcie; struct dw_pcie_rp *pp; struct resource *res; struct dw_pcie *pci; int ret; pcie_cfg = of_device_get_match_data(dev); if (!pcie_cfg || !pcie_cfg->ops) { dev_err(dev, "Invalid platform data\n"); return -EINVAL; } 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) goto err_pm_runtime_put; pci->dev = dev; pci->ops = &dw_pcie_ops; pp = &pci->pp; pcie->pci = pci; pcie->cfg = pcie_cfg; 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; } pcie->parf = devm_platform_ioremap_resource_byname(pdev, "parf"); if (IS_ERR(pcie->parf)) { ret = PTR_ERR(pcie->parf); goto err_pm_runtime_put; } pcie->elbi = devm_platform_ioremap_resource_byname(pdev, "elbi"); if (IS_ERR(pcie->elbi)) { ret = PTR_ERR(pcie->elbi); goto err_pm_runtime_put; } /* MHI region is optional */ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mhi"); if (res) { pcie->mhi = devm_ioremap_resource(dev, res); if (IS_ERR(pcie->mhi)) { ret = PTR_ERR(pcie->mhi); 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 = qcom_pcie_icc_init(pcie); if (ret) goto err_pm_runtime_put; ret = pcie->cfg->ops->get_resources(pcie); if (ret) goto err_pm_runtime_put; pp->ops = &qcom_pcie_dw_ops; 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; } qcom_pcie_icc_update(pcie); if (pcie->mhi) qcom_pcie_init_debugfs(pcie); return 0; err_phy_exit: phy_exit(pcie->phy); err_pm_runtime_put: pm_runtime_put(dev); pm_runtime_disable(dev); return ret; } static int qcom_pcie_suspend_noirq(struct device *dev) { struct qcom_pcie *pcie = dev_get_drvdata(dev); int ret; /* * Set minimum bandwidth required to keep data path functional during * suspend. */ ret = icc_set_bw(pcie->icc_mem, 0, kBps_to_icc(1)); if (ret) { dev_err(dev, "Failed to set interconnect bandwidth: %d\n", ret); return ret; } /* * Turn OFF the resources only for controllers without active PCIe * devices. For controllers with active devices, the resources are kept * ON and the link is expected to be in L0/L1 (sub)states. * * Turning OFF the resources for controllers with active PCIe devices * will trigger access violation during the end of the suspend cycle, * as kernel tries to access the PCIe devices config space for masking * MSIs. * * Also, it is not desirable to put the link into L2/L3 state as that * implies VDD supply will be removed and the devices may go into * powerdown state. This will affect the lifetime of the storage devices * like NVMe. */ if (!dw_pcie_link_up(pcie->pci)) { qcom_pcie_host_deinit(&pcie->pci->pp); pcie->suspended = true; } return 0; } static int qcom_pcie_resume_noirq(struct device *dev) { struct qcom_pcie *pcie = dev_get_drvdata(dev); int ret; if (pcie->suspended) { ret = qcom_pcie_host_init(&pcie->pci->pp); if (ret) return ret; pcie->suspended = false; } qcom_pcie_icc_update(pcie); return 0; } static const struct of_device_id qcom_pcie_match[] = { { .compatible = "qcom,pcie-apq8064", .data = &cfg_2_1_0 }, { .compatible = "qcom,pcie-apq8084", .data = &cfg_1_0_0 }, { .compatible = "qcom,pcie-ipq4019", .data = &cfg_2_4_0 }, { .compatible = "qcom,pcie-ipq6018", .data = &cfg_2_9_0 }, { .compatible = "qcom,pcie-ipq8064", .data = &cfg_2_1_0 }, { .compatible = "qcom,pcie-ipq8064-v2", .data = &cfg_2_1_0 }, { .compatible = "qcom,pcie-ipq8074", .data = &cfg_2_3_3 }, { .compatible = "qcom,pcie-ipq8074-gen3", .data = &cfg_2_9_0 }, { .compatible = "qcom,pcie-msm8996", .data = &cfg_2_3_2 }, { .compatible = "qcom,pcie-qcs404", .data = &cfg_2_4_0 }, { .compatible = "qcom,pcie-sa8540p", .data = &cfg_sc8280xp }, { .compatible = "qcom,pcie-sa8775p", .data = &cfg_1_9_0}, { .compatible = "qcom,pcie-sc7280", .data = &cfg_1_9_0 }, { .compatible = "qcom,pcie-sc8180x", .data = &cfg_1_9_0 }, { .compatible = "qcom,pcie-sc8280xp", .data = &cfg_sc8280xp }, { .compatible = "qcom,pcie-sdm845", .data = &cfg_2_7_0 }, { .compatible = "qcom,pcie-sdx55", .data = &cfg_1_9_0 }, { .compatible = "qcom,pcie-sm8150", .data = &cfg_1_9_0 }, { .compatible = "qcom,pcie-sm8250", .data = &cfg_1_9_0 }, { .compatible = "qcom,pcie-sm8350", .data = &cfg_1_9_0 }, { .compatible = "qcom,pcie-sm8450-pcie0", .data = &cfg_1_9_0 }, { .compatible = "qcom,pcie-sm8450-pcie1", .data = &cfg_1_9_0 }, { .compatible = "qcom,pcie-sm8550", .data = &cfg_1_9_0 }, { .compatible = "qcom,pcie-x1e80100", .data = &cfg_1_9_0 }, { } }; static void qcom_fixup_class(struct pci_dev *dev) { dev->class = PCI_CLASS_BRIDGE_PCI_NORMAL; } DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0101, qcom_fixup_class); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0104, qcom_fixup_class); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0106, qcom_fixup_class); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0107, qcom_fixup_class); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0302, qcom_fixup_class); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x1000, qcom_fixup_class); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x1001, qcom_fixup_class); static const struct dev_pm_ops qcom_pcie_pm_ops = { NOIRQ_SYSTEM_SLEEP_PM_OPS(qcom_pcie_suspend_noirq, qcom_pcie_resume_noirq) }; 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, .pm = &qcom_pcie_pm_ops, .probe_type = PROBE_PREFER_ASYNCHRONOUS, }, }; builtin_platform_driver(qcom_pcie_driver);
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