1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2015 Broadcom Corporation
4 */
5
6#include <linux/kernel.h>
7#include <linux/pci.h>
8#include <linux/clk.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>
18
19#include "../pci.h"
20#include "pcie-iproc.h"
21
22static const struct of_device_id iproc_pcie_of_match_table[] = {
23	{
24		.compatible = "brcm,iproc-pcie",
25		.data = (int *)IPROC_PCIE_PAXB,
26	}, {
27		.compatible = "brcm,iproc-pcie-paxb-v2",
28		.data = (int *)IPROC_PCIE_PAXB_V2,
29	}, {
30		.compatible = "brcm,iproc-pcie-paxc",
31		.data = (int *)IPROC_PCIE_PAXC,
32	}, {
33		.compatible = "brcm,iproc-pcie-paxc-v2",
34		.data = (int *)IPROC_PCIE_PAXC_V2,
35	},
36	{ /* sentinel */ }
37};
38MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
39
40static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
41{
42	struct device *dev = &pdev->dev;
43	struct iproc_pcie *pcie;
44	struct device_node *np = dev->of_node;
45	struct resource reg;
46	struct pci_host_bridge *bridge;
47	int ret;
48
49	bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
50	if (!bridge)
51		return -ENOMEM;
52
53	pcie = pci_host_bridge_priv(bridge);
54
55	pcie->dev = dev;
56	pcie->type = (enum iproc_pcie_type) of_device_get_match_data(dev);
57
58	ret = of_address_to_resource(np, 0, &reg);
59	if (ret < 0) {
60		dev_err(dev, "unable to obtain controller resources\n");
61		return ret;
62	}
63
64	pcie->base = devm_pci_remap_cfgspace(dev, reg.start,
65					     resource_size(&reg));
66	if (!pcie->base) {
67		dev_err(dev, "unable to map controller registers\n");
68		return -ENOMEM;
69	}
70	pcie->base_addr = reg.start;
71
72	if (of_property_read_bool(np, "brcm,pcie-ob")) {
73		u32 val;
74
75		ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
76					   &val);
77		if (ret) {
78			dev_err(dev,
79				"missing brcm,pcie-ob-axi-offset property\n");
80			return ret;
81		}
82		pcie->ob.axi_offset = val;
83		pcie->need_ob_cfg = true;
84	}
85
86	/*
87	 * DT nodes are not used by all platforms that use the iProc PCIe
88	 * core driver. For platforms that require explicit inbound mapping
89	 * configuration, "dma-ranges" would have been present in DT
90	 */
91	pcie->need_ib_cfg = of_property_read_bool(np, "dma-ranges");
92
93	/* PHY use is optional */
94	pcie->phy = devm_phy_optional_get(dev, "pcie-phy");
95	if (IS_ERR(pcie->phy))
96		return PTR_ERR(pcie->phy);
97
98	/* PAXC doesn't support legacy IRQs, skip mapping */
99	switch (pcie->type) {
100	case IPROC_PCIE_PAXC:
101	case IPROC_PCIE_PAXC_V2:
102		pcie->map_irq = NULL;
103		break;
104	default:
105		break;
106	}
107
108	ret = iproc_pcie_setup(pcie, &bridge->windows);
109	if (ret) {
110		dev_err(dev, "PCIe controller setup failed\n");
111		return ret;
112	}
113
114	platform_set_drvdata(pdev, pcie);
115	return 0;
116}
117
118static int iproc_pcie_pltfm_remove(struct platform_device *pdev)
119{
120	struct iproc_pcie *pcie = platform_get_drvdata(pdev);
121
122	return iproc_pcie_remove(pcie);
123}
124
125static void iproc_pcie_pltfm_shutdown(struct platform_device *pdev)
126{
127	struct iproc_pcie *pcie = platform_get_drvdata(pdev);
128
129	iproc_pcie_shutdown(pcie);
130}
131
132static struct platform_driver iproc_pcie_pltfm_driver = {
133	.driver = {
134		.name = "iproc-pcie",
135		.of_match_table = of_match_ptr(iproc_pcie_of_match_table),
136	},
137	.probe = iproc_pcie_pltfm_probe,
138	.remove = iproc_pcie_pltfm_remove,
139	.shutdown = iproc_pcie_pltfm_shutdown,
140};
141module_platform_driver(iproc_pcie_pltfm_driver);
142
143MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
144MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
145MODULE_LICENSE("GPL v2");
146