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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (C) 2015 Broadcom Corporation4 */5 6#include <linux/kernel.h>7#include <linux/pci.h>8#include <linux/clk.h>9#include <linux/module.h>10#include <linux/slab.h>11#include <linux/interrupt.h>12#include <linux/platform_device.h>13#include <linux/of_address.h>14#include <linux/of_pci.h>15#include <linux/of_platform.h>16#include <linux/phy/phy.h>17 18#include "../pci.h"19#include "pcie-iproc.h"20 21static const struct of_device_id iproc_pcie_of_match_table[] = {22 {23 .compatible = "brcm,iproc-pcie",24 .data = (int *)IPROC_PCIE_PAXB,25 }, {26 .compatible = "brcm,iproc-pcie-paxb-v2",27 .data = (int *)IPROC_PCIE_PAXB_V2,28 }, {29 .compatible = "brcm,iproc-pcie-paxc",30 .data = (int *)IPROC_PCIE_PAXC,31 }, {32 .compatible = "brcm,iproc-pcie-paxc-v2",33 .data = (int *)IPROC_PCIE_PAXC_V2,34 },35 { /* sentinel */ }36};37MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);38 39static int iproc_pltfm_pcie_probe(struct platform_device *pdev)40{41 struct device *dev = &pdev->dev;42 struct iproc_pcie *pcie;43 struct device_node *np = dev->of_node;44 struct resource reg;45 struct pci_host_bridge *bridge;46 int ret;47 48 bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));49 if (!bridge)50 return -ENOMEM;51 52 pcie = pci_host_bridge_priv(bridge);53 54 pcie->dev = dev;55 pcie->type = (uintptr_t)of_device_get_match_data(dev);56 57 ret = of_address_to_resource(np, 0, ®);58 if (ret < 0) {59 dev_err(dev, "unable to obtain controller resources\n");60 return ret;61 }62 63 pcie->base = devm_pci_remap_cfgspace(dev, reg.start,64 resource_size(®));65 if (!pcie->base) {66 dev_err(dev, "unable to map controller registers\n");67 return -ENOMEM;68 }69 pcie->base_addr = reg.start;70 71 if (of_property_read_bool(np, "brcm,pcie-ob")) {72 u32 val;73 74 ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",75 &val);76 if (ret) {77 dev_err(dev,78 "missing brcm,pcie-ob-axi-offset property\n");79 return ret;80 }81 pcie->ob.axi_offset = val;82 pcie->need_ob_cfg = true;83 }84 85 /*86 * DT nodes are not used by all platforms that use the iProc PCIe87 * core driver. For platforms that require explicit inbound mapping88 * configuration, "dma-ranges" would have been present in DT89 */90 pcie->need_ib_cfg = of_property_read_bool(np, "dma-ranges");91 92 /* PHY use is optional */93 pcie->phy = devm_phy_optional_get(dev, "pcie-phy");94 if (IS_ERR(pcie->phy))95 return PTR_ERR(pcie->phy);96 97 /* PAXC doesn't support legacy IRQs, skip mapping */98 switch (pcie->type) {99 case IPROC_PCIE_PAXC:100 case IPROC_PCIE_PAXC_V2:101 pcie->map_irq = NULL;102 break;103 default:104 break;105 }106 107 ret = iproc_pcie_setup(pcie, &bridge->windows);108 if (ret) {109 dev_err(dev, "PCIe controller setup failed\n");110 return ret;111 }112 113 platform_set_drvdata(pdev, pcie);114 return 0;115}116 117static void iproc_pltfm_pcie_remove(struct platform_device *pdev)118{119 struct iproc_pcie *pcie = platform_get_drvdata(pdev);120 121 iproc_pcie_remove(pcie);122}123 124static void iproc_pltfm_pcie_shutdown(struct platform_device *pdev)125{126 struct iproc_pcie *pcie = platform_get_drvdata(pdev);127 128 iproc_pcie_shutdown(pcie);129}130 131static struct platform_driver iproc_pltfm_pcie_driver = {132 .driver = {133 .name = "iproc-pcie",134 .of_match_table = of_match_ptr(iproc_pcie_of_match_table),135 },136 .probe = iproc_pltfm_pcie_probe,137 .remove_new = iproc_pltfm_pcie_remove,138 .shutdown = iproc_pltfm_pcie_shutdown,139};140module_platform_driver(iproc_pltfm_pcie_driver);141 142MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");143MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");144MODULE_LICENSE("GPL v2");145