2 * Copyright (C) 2015 Broadcom Corporation
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation version 2.
8 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
9 * kind, whether express or implied; without even the implied warranty
10 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
14 #include <linux/kernel.h>
15 #include <linux/pci.h>
16 #include <linux/clk.h>
17 #include <linux/module.h>
18 #include <linux/slab.h>
19 #include <linux/interrupt.h>
20 #include <linux/platform_device.h>
21 #include <linux/of_address.h>
22 #include <linux/of_pci.h>
23 #include <linux/of_irq.h>
24 #include <linux/of_platform.h>
25 #include <linux/phy/phy.h>
27 #include "pcie-iproc.h"
29 static const struct of_device_id iproc_pcie_of_match_table[] = {
31 .compatible = "brcm,iproc-pcie",
32 .data = (int *)IPROC_PCIE_PAXB,
34 .compatible = "brcm,iproc-pcie-paxb-v2",
35 .data = (int *)IPROC_PCIE_PAXB_V2,
37 .compatible = "brcm,iproc-pcie-paxc",
38 .data = (int *)IPROC_PCIE_PAXC,
40 .compatible = "brcm,iproc-pcie-paxc-v2",
41 .data = (int *)IPROC_PCIE_PAXC_V2,
45 MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
47 static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
49 struct device *dev = &pdev->dev;
50 struct iproc_pcie *pcie;
51 struct device_node *np = dev->of_node;
53 resource_size_t iobase = 0;
55 struct pci_host_bridge *bridge;
58 bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
62 pcie = pci_host_bridge_priv(bridge);
65 pcie->type = (enum iproc_pcie_type) of_device_get_match_data(dev);
67 ret = of_address_to_resource(np, 0, ®);
69 dev_err(dev, "unable to obtain controller resources\n");
73 pcie->base = devm_pci_remap_cfgspace(dev, reg.start,
76 dev_err(dev, "unable to map controller registers\n");
79 pcie->base_addr = reg.start;
81 if (of_property_read_bool(np, "brcm,pcie-ob")) {
84 ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
88 "missing brcm,pcie-ob-axi-offset property\n");
91 pcie->ob.axi_offset = val;
92 pcie->need_ob_cfg = true;
96 * DT nodes are not used by all platforms that use the iProc PCIe
97 * core driver. For platforms that require explict inbound mapping
98 * configuration, "dma-ranges" would have been present in DT
100 pcie->need_ib_cfg = of_property_read_bool(np, "dma-ranges");
102 /* PHY use is optional */
103 pcie->phy = devm_phy_get(dev, "pcie-phy");
104 if (IS_ERR(pcie->phy)) {
105 if (PTR_ERR(pcie->phy) == -EPROBE_DEFER)
106 return -EPROBE_DEFER;
110 ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &resources,
113 dev_err(dev, "unable to get PCI host bridge resources\n");
117 /* PAXC doesn't support legacy IRQs, skip mapping */
118 switch (pcie->type) {
119 case IPROC_PCIE_PAXC:
120 case IPROC_PCIE_PAXC_V2:
123 pcie->map_irq = of_irq_parse_and_map_pci;
126 ret = iproc_pcie_setup(pcie, &resources);
128 dev_err(dev, "PCIe controller setup failed\n");
129 pci_free_resource_list(&resources);
133 platform_set_drvdata(pdev, pcie);
137 static int iproc_pcie_pltfm_remove(struct platform_device *pdev)
139 struct iproc_pcie *pcie = platform_get_drvdata(pdev);
141 return iproc_pcie_remove(pcie);
144 static void iproc_pcie_pltfm_shutdown(struct platform_device *pdev)
146 struct iproc_pcie *pcie = platform_get_drvdata(pdev);
148 iproc_pcie_shutdown(pcie);
151 static struct platform_driver iproc_pcie_pltfm_driver = {
153 .name = "iproc-pcie",
154 .of_match_table = of_match_ptr(iproc_pcie_of_match_table),
156 .probe = iproc_pcie_pltfm_probe,
157 .remove = iproc_pcie_pltfm_remove,
158 .shutdown = iproc_pcie_pltfm_shutdown,
160 module_platform_driver(iproc_pcie_pltfm_driver);
162 MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
163 MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
164 MODULE_LICENSE("GPL v2");