1/*
2 * Copyright (C) 2015 Broadcom Corporation
3 *
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.
7 *
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.
12 */
13
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>
26
27#include "pcie-iproc.h"
28
29static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
30{
31	struct iproc_pcie *pcie;
32	struct device_node *np = pdev->dev.of_node;
33	struct resource reg;
34	resource_size_t iobase = 0;
35	LIST_HEAD(res);
36	int ret;
37
38	pcie = devm_kzalloc(&pdev->dev, sizeof(struct iproc_pcie), GFP_KERNEL);
39	if (!pcie)
40		return -ENOMEM;
41
42	pcie->dev = &pdev->dev;
43	platform_set_drvdata(pdev, pcie);
44
45	ret = of_address_to_resource(np, 0, &reg);
46	if (ret < 0) {
47		dev_err(pcie->dev, "unable to obtain controller resources\n");
48		return ret;
49	}
50
51	pcie->base = devm_ioremap(pcie->dev, reg.start, resource_size(&reg));
52	if (!pcie->base) {
53		dev_err(pcie->dev, "unable to map controller registers\n");
54		return -ENOMEM;
55	}
56
57	/* PHY use is optional */
58	pcie->phy = devm_phy_get(&pdev->dev, "pcie-phy");
59	if (IS_ERR(pcie->phy)) {
60		if (PTR_ERR(pcie->phy) == -EPROBE_DEFER)
61			return -EPROBE_DEFER;
62		pcie->phy = NULL;
63	}
64
65	ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &res, &iobase);
66	if (ret) {
67		dev_err(pcie->dev,
68			"unable to get PCI host bridge resources\n");
69		return ret;
70	}
71
72	pcie->resources = &res;
73
74	ret = iproc_pcie_setup(pcie);
75	if (ret) {
76		dev_err(pcie->dev, "PCIe controller setup failed\n");
77		return ret;
78	}
79
80	return 0;
81}
82
83static int iproc_pcie_pltfm_remove(struct platform_device *pdev)
84{
85	struct iproc_pcie *pcie = platform_get_drvdata(pdev);
86
87	return iproc_pcie_remove(pcie);
88}
89
90static const struct of_device_id iproc_pcie_of_match_table[] = {
91	{ .compatible = "brcm,iproc-pcie", },
92	{ /* sentinel */ }
93};
94MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
95
96static struct platform_driver iproc_pcie_pltfm_driver = {
97	.driver = {
98		.name = "iproc-pcie",
99		.of_match_table = of_match_ptr(iproc_pcie_of_match_table),
100	},
101	.probe = iproc_pcie_pltfm_probe,
102	.remove = iproc_pcie_pltfm_remove,
103};
104module_platform_driver(iproc_pcie_pltfm_driver);
105
106MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
107MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
108MODULE_LICENSE("GPL v2");
109