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;
57 pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
62 pcie->type = (enum iproc_pcie_type) of_device_get_match_data(dev);
64 ret = of_address_to_resource(np, 0, ®);
66 dev_err(dev, "unable to obtain controller resources\n");
70 pcie->base = devm_pci_remap_cfgspace(dev, reg.start,
73 dev_err(dev, "unable to map controller registers\n");
76 pcie->base_addr = reg.start;
78 if (of_property_read_bool(np, "brcm,pcie-ob")) {
81 ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
85 "missing brcm,pcie-ob-axi-offset property\n");
88 pcie->ob.axi_offset = val;
89 pcie->need_ob_cfg = true;
92 /* PHY use is optional */
93 pcie->phy = devm_phy_get(dev, "pcie-phy");
94 if (IS_ERR(pcie->phy)) {
95 if (PTR_ERR(pcie->phy) == -EPROBE_DEFER)
100 ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &resources,
103 dev_err(dev, "unable to get PCI host bridge resources\n");
107 /* PAXC doesn't support legacy IRQs, skip mapping */
108 switch (pcie->type) {
109 case IPROC_PCIE_PAXC:
110 case IPROC_PCIE_PAXC_V2:
113 pcie->map_irq = of_irq_parse_and_map_pci;
116 ret = iproc_pcie_setup(pcie, &resources);
118 dev_err(dev, "PCIe controller setup failed\n");
119 pci_free_resource_list(&resources);
123 platform_set_drvdata(pdev, pcie);
127 static int iproc_pcie_pltfm_remove(struct platform_device *pdev)
129 struct iproc_pcie *pcie = platform_get_drvdata(pdev);
131 return iproc_pcie_remove(pcie);
134 static struct platform_driver iproc_pcie_pltfm_driver = {
136 .name = "iproc-pcie",
137 .of_match_table = of_match_ptr(iproc_pcie_of_match_table),
139 .probe = iproc_pcie_pltfm_probe,
140 .remove = iproc_pcie_pltfm_remove,
142 module_platform_driver(iproc_pcie_pltfm_driver);
144 MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
145 MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
146 MODULE_LICENSE("GPL v2");