1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2015 Broadcom Corporation
6 #include <linux/kernel.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>
20 #include "pcie-iproc.h"
22 static const struct of_device_id iproc_pcie_of_match_table[] = {
24 .compatible = "brcm,iproc-pcie",
25 .data = (int *)IPROC_PCIE_PAXB,
27 .compatible = "brcm,iproc-pcie-paxb-v2",
28 .data = (int *)IPROC_PCIE_PAXB_V2,
30 .compatible = "brcm,iproc-pcie-paxc",
31 .data = (int *)IPROC_PCIE_PAXC,
33 .compatible = "brcm,iproc-pcie-paxc-v2",
34 .data = (int *)IPROC_PCIE_PAXC_V2,
38 MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
40 static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
42 struct device *dev = &pdev->dev;
43 struct iproc_pcie *pcie;
44 struct device_node *np = dev->of_node;
46 resource_size_t iobase = 0;
48 struct pci_host_bridge *bridge;
51 bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
55 pcie = pci_host_bridge_priv(bridge);
58 pcie->type = (enum iproc_pcie_type) of_device_get_match_data(dev);
60 ret = of_address_to_resource(np, 0, ®);
62 dev_err(dev, "unable to obtain controller resources\n");
66 pcie->base = devm_pci_remap_cfgspace(dev, reg.start,
69 dev_err(dev, "unable to map controller registers\n");
72 pcie->base_addr = reg.start;
74 if (of_property_read_bool(np, "brcm,pcie-ob")) {
77 ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
81 "missing brcm,pcie-ob-axi-offset property\n");
84 pcie->ob.axi_offset = val;
85 pcie->need_ob_cfg = true;
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
93 pcie->need_ib_cfg = of_property_read_bool(np, "dma-ranges");
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)
103 ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, &resources,
106 dev_err(dev, "unable to get PCI host bridge resources\n");
110 /* PAXC doesn't support legacy IRQs, skip mapping */
111 switch (pcie->type) {
112 case IPROC_PCIE_PAXC:
113 case IPROC_PCIE_PAXC_V2:
116 pcie->map_irq = of_irq_parse_and_map_pci;
119 ret = iproc_pcie_setup(pcie, &resources);
121 dev_err(dev, "PCIe controller setup failed\n");
122 pci_free_resource_list(&resources);
126 platform_set_drvdata(pdev, pcie);
130 static int iproc_pcie_pltfm_remove(struct platform_device *pdev)
132 struct iproc_pcie *pcie = platform_get_drvdata(pdev);
134 return iproc_pcie_remove(pcie);
137 static void iproc_pcie_pltfm_shutdown(struct platform_device *pdev)
139 struct iproc_pcie *pcie = platform_get_drvdata(pdev);
141 iproc_pcie_shutdown(pcie);
144 static struct platform_driver iproc_pcie_pltfm_driver = {
146 .name = "iproc-pcie",
147 .of_match_table = of_match_ptr(iproc_pcie_of_match_table),
149 .probe = iproc_pcie_pltfm_probe,
150 .remove = iproc_pcie_pltfm_remove,
151 .shutdown = iproc_pcie_pltfm_shutdown,
153 module_platform_driver(iproc_pcie_pltfm_driver);
156 MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
157 MODULE_LICENSE("GPL v2");