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 22 static 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 }; 38 MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table); 39 40 static 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 resource_size_t iobase = 0; 47 LIST_HEAD(resources); 48 struct pci_host_bridge *bridge; 49 int ret; 50 51 bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie)); 52 if (!bridge) 53 return -ENOMEM; 54 55 pcie = pci_host_bridge_priv(bridge); 56 57 pcie->dev = dev; 58 pcie->type = (enum iproc_pcie_type) of_device_get_match_data(dev); 59 60 ret = of_address_to_resource(np, 0, ®); 61 if (ret < 0) { 62 dev_err(dev, "unable to obtain controller resources\n"); 63 return ret; 64 } 65 66 pcie->base = devm_pci_remap_cfgspace(dev, reg.start, 67 resource_size(®)); 68 if (!pcie->base) { 69 dev_err(dev, "unable to map controller registers\n"); 70 return -ENOMEM; 71 } 72 pcie->base_addr = reg.start; 73 74 if (of_property_read_bool(np, "brcm,pcie-ob")) { 75 u32 val; 76 77 ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset", 78 &val); 79 if (ret) { 80 dev_err(dev, 81 "missing brcm,pcie-ob-axi-offset property\n"); 82 return ret; 83 } 84 pcie->ob.axi_offset = val; 85 pcie->need_ob_cfg = true; 86 } 87 88 /* 89 * DT nodes are not used by all platforms that use the iProc PCIe 90 * core driver. For platforms that require explict inbound mapping 91 * configuration, "dma-ranges" would have been present in DT 92 */ 93 pcie->need_ib_cfg = of_property_read_bool(np, "dma-ranges"); 94 95 /* PHY use is optional */ 96 pcie->phy = devm_phy_get(dev, "pcie-phy"); 97 if (IS_ERR(pcie->phy)) { 98 if (PTR_ERR(pcie->phy) == -EPROBE_DEFER) 99 return -EPROBE_DEFER; 100 pcie->phy = NULL; 101 } 102 103 ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, &resources, 104 &iobase); 105 if (ret) { 106 dev_err(dev, "unable to get PCI host bridge resources\n"); 107 return ret; 108 } 109 110 /* PAXC doesn't support legacy IRQs, skip mapping */ 111 switch (pcie->type) { 112 case IPROC_PCIE_PAXC: 113 case IPROC_PCIE_PAXC_V2: 114 break; 115 default: 116 pcie->map_irq = of_irq_parse_and_map_pci; 117 } 118 119 ret = iproc_pcie_setup(pcie, &resources); 120 if (ret) { 121 dev_err(dev, "PCIe controller setup failed\n"); 122 pci_free_resource_list(&resources); 123 return ret; 124 } 125 126 platform_set_drvdata(pdev, pcie); 127 return 0; 128 } 129 130 static int iproc_pcie_pltfm_remove(struct platform_device *pdev) 131 { 132 struct iproc_pcie *pcie = platform_get_drvdata(pdev); 133 134 return iproc_pcie_remove(pcie); 135 } 136 137 static void iproc_pcie_pltfm_shutdown(struct platform_device *pdev) 138 { 139 struct iproc_pcie *pcie = platform_get_drvdata(pdev); 140 141 iproc_pcie_shutdown(pcie); 142 } 143 144 static struct platform_driver iproc_pcie_pltfm_driver = { 145 .driver = { 146 .name = "iproc-pcie", 147 .of_match_table = of_match_ptr(iproc_pcie_of_match_table), 148 }, 149 .probe = iproc_pcie_pltfm_probe, 150 .remove = iproc_pcie_pltfm_remove, 151 .shutdown = iproc_pcie_pltfm_shutdown, 152 }; 153 module_platform_driver(iproc_pcie_pltfm_driver); 154 155 MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>"); 156 MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver"); 157 MODULE_LICENSE("GPL v2"); 158