LXR linux/drivers/pci/controller/pcie-iproc-platform.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (C) 2015 Broadcom Corporation
   4 */
   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_irq.h>
  16#include <linux/of_platform.h>
  17#include <linux/phy/phy.h>
  18
  19#include "../pci.h"
  20#include "pcie-iproc.h"
  21
  22static const struct of_device_id iproc_pcie_of_match_table[] = {
  23        {
  24                .compatible = "brcm,iproc-pcie",
  25                .data = (int *)IPROC_PCIE_PAXB,
  26        }, {
  27                .compatible = "brcm,iproc-pcie-paxb-v2",
  28                .data = (int *)IPROC_PCIE_PAXB_V2,
  29        }, {
  30                .compatible = "brcm,iproc-pcie-paxc",
  31                .data = (int *)IPROC_PCIE_PAXC,
  32        }, {
  33                .compatible = "brcm,iproc-pcie-paxc-v2",
  34                .data = (int *)IPROC_PCIE_PAXC_V2,
  35        },
  36        { /* sentinel */ }
  37};
  38MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
  39
  40static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
  41{
  42        struct device *dev = &pdev->dev;
  43        struct iproc_pcie *pcie;
  44        struct device_node *np = dev->of_node;
  45        struct resource reg;
  46        struct pci_host_bridge *bridge;
  47        int ret;
  48
  49        bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
  50        if (!bridge)
  51                return -ENOMEM;
  52
  53        pcie = pci_host_bridge_priv(bridge);
  54
  55        pcie->dev = dev;
  56        pcie->type = (enum iproc_pcie_type) of_device_get_match_data(dev);
  57
  58        ret = of_address_to_resource(np, 0, &reg);
  59        if (ret < 0) {
  60                dev_err(dev, "unable to obtain controller resources\n");
  61                return ret;
  62        }
  63
  64        pcie->base = devm_pci_remap_cfgspace(dev, reg.start,
  65                                             resource_size(&reg));
  66        if (!pcie->base) {
  67                dev_err(dev, "unable to map controller registers\n");
  68                return -ENOMEM;
  69        }
  70        pcie->base_addr = reg.start;
  71
  72        if (of_property_read_bool(np, "brcm,pcie-ob")) {
  73                u32 val;
  74
  75                ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
  76                                           &val);
  77                if (ret) {
  78                        dev_err(dev,
  79                                "missing brcm,pcie-ob-axi-offset property\n");
  80                        return ret;
  81                }
  82                pcie->ob.axi_offset = val;
  83                pcie->need_ob_cfg = true;
  84        }
  85
  86        /*
  87         * DT nodes are not used by all platforms that use the iProc PCIe
  88         * core driver. For platforms that require explicit inbound mapping
  89         * configuration, "dma-ranges" would have been present in DT
  90         */
  91        pcie->need_ib_cfg = of_property_read_bool(np, "dma-ranges");
  92
  93        /* PHY use is optional */
  94        pcie->phy = devm_phy_optional_get(dev, "pcie-phy");
  95        if (IS_ERR(pcie->phy))
  96                return PTR_ERR(pcie->phy);
  97
  98        /* PAXC doesn't support legacy IRQs, skip mapping */
  99        switch (pcie->type) {
 100        case IPROC_PCIE_PAXC:
 101        case IPROC_PCIE_PAXC_V2:
 102                pcie->map_irq = NULL;
 103                break;
 104        default:
 105                break;
 106        }
 107
 108        ret = iproc_pcie_setup(pcie, &bridge->windows);
 109        if (ret) {
 110                dev_err(dev, "PCIe controller setup failed\n");
 111                return ret;
 112        }
 113
 114        platform_set_drvdata(pdev, pcie);
 115        return 0;
 116}
 117
 118static int iproc_pcie_pltfm_remove(struct platform_device *pdev)
 119{
 120        struct iproc_pcie *pcie = platform_get_drvdata(pdev);
 121
 122        return iproc_pcie_remove(pcie);
 123}
 124
 125static void iproc_pcie_pltfm_shutdown(struct platform_device *pdev)
 126{
 127        struct iproc_pcie *pcie = platform_get_drvdata(pdev);
 128
 129        iproc_pcie_shutdown(pcie);
 130}
 131
 132static struct platform_driver iproc_pcie_pltfm_driver = {
 133        .driver = {
 134                .name = "iproc-pcie",
 135                .of_match_table = of_match_ptr(iproc_pcie_of_match_table),
 136        },
 137        .probe = iproc_pcie_pltfm_probe,
 138        .remove = iproc_pcie_pltfm_remove,
 139        .shutdown = iproc_pcie_pltfm_shutdown,
 140};
 141module_platform_driver(iproc_pcie_pltfm_driver);
 142
 143MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
 144MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
 145MODULE_LICENSE("GPL v2");
 146