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	if (of_property_read_bool(np, "brcm,pcie-ob")) {
58		u32 val;
59
60		ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
61					   &val);
62		if (ret) {
63			dev_err(pcie->dev,
64				"missing brcm,pcie-ob-axi-offset property\n");
65			return ret;
66		}
67		pcie->ob.axi_offset = val;
68
69		ret = of_property_read_u32(np, "brcm,pcie-ob-window-size",
70					   &val);
71		if (ret) {
72			dev_err(pcie->dev,
73				"missing brcm,pcie-ob-window-size property\n");
74			return ret;
75		}
76		pcie->ob.window_size = (resource_size_t)val * SZ_1M;
77
78		if (of_property_read_bool(np, "brcm,pcie-ob-oarr-size"))
79			pcie->ob.set_oarr_size = true;
80
81		pcie->need_ob_cfg = true;
82	}
83
84	/* PHY use is optional */
85	pcie->phy = devm_phy_get(&pdev->dev, "pcie-phy");
86	if (IS_ERR(pcie->phy)) {
87		if (PTR_ERR(pcie->phy) == -EPROBE_DEFER)
88			return -EPROBE_DEFER;
89		pcie->phy = NULL;
90	}
91
92	ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &res, &iobase);
93	if (ret) {
94		dev_err(pcie->dev,
95			"unable to get PCI host bridge resources\n");
96		return ret;
97	}
98
99	pcie->map_irq = of_irq_parse_and_map_pci;
100
101	ret = iproc_pcie_setup(pcie, &res);
102	if (ret)
103		dev_err(pcie->dev, "PCIe controller setup failed\n");
104
105	pci_free_resource_list(&res);
106
107	return ret;
108}
109
110static int iproc_pcie_pltfm_remove(struct platform_device *pdev)
111{
112	struct iproc_pcie *pcie = platform_get_drvdata(pdev);
113
114	return iproc_pcie_remove(pcie);
115}
116
117static const struct of_device_id iproc_pcie_of_match_table[] = {
118	{ .compatible = "brcm,iproc-pcie", },
119	{ /* sentinel */ }
120};
121MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
122
123static struct platform_driver iproc_pcie_pltfm_driver = {
124	.driver = {
125		.name = "iproc-pcie",
126		.of_match_table = of_match_ptr(iproc_pcie_of_match_table),
127	},
128	.probe = iproc_pcie_pltfm_probe,
129	.remove = iproc_pcie_pltfm_remove,
130};
131module_platform_driver(iproc_pcie_pltfm_driver);
132
133MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
134MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
135MODULE_LICENSE("GPL v2");
136