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_platform.h>
16#include <linux/phy/phy.h>
17
18#include "../pci.h"
19#include "pcie-iproc.h"
20
21static const struct of_device_id iproc_pcie_of_match_table[] = {
22	{
23		.compatible = "brcm,iproc-pcie",
24		.data = (int *)IPROC_PCIE_PAXB,
25	}, {
26		.compatible = "brcm,iproc-pcie-paxb-v2",
27		.data = (int *)IPROC_PCIE_PAXB_V2,
28	}, {
29		.compatible = "brcm,iproc-pcie-paxc",
30		.data = (int *)IPROC_PCIE_PAXC,
31	}, {
32		.compatible = "brcm,iproc-pcie-paxc-v2",
33		.data = (int *)IPROC_PCIE_PAXC_V2,
34	},
35	{ /* sentinel */ }
36};
37MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
38
39static int iproc_pltfm_pcie_probe(struct platform_device *pdev)
40{
41	struct device *dev = &pdev->dev;
42	struct iproc_pcie *pcie;
43	struct device_node *np = dev->of_node;
44	struct resource reg;
45	struct pci_host_bridge *bridge;
46	int ret;
47
48	bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
49	if (!bridge)
50		return -ENOMEM;
51
52	pcie = pci_host_bridge_priv(bridge);
53
54	pcie->dev = dev;
55	pcie->type = (uintptr_t)of_device_get_match_data(dev);
56
57	ret = of_address_to_resource(np, 0, &reg);
58	if (ret < 0) {
59		dev_err(dev, "unable to obtain controller resources\n");
60		return ret;
61	}
62
63	pcie->base = devm_pci_remap_cfgspace(dev, reg.start,
64					     resource_size(&reg));
65	if (!pcie->base) {
66		dev_err(dev, "unable to map controller registers\n");
67		return -ENOMEM;
68	}
69	pcie->base_addr = reg.start;
70
71	if (of_property_read_bool(np, "brcm,pcie-ob")) {
72		u32 val;
73
74		ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
75					   &val);
76		if (ret) {
77			dev_err(dev,
78				"missing brcm,pcie-ob-axi-offset property\n");
79			return ret;
80		}
81		pcie->ob.axi_offset = val;
82		pcie->need_ob_cfg = true;
83	}
84
85	/*
86	 * DT nodes are not used by all platforms that use the iProc PCIe
87	 * core driver. For platforms that require explicit inbound mapping
88	 * configuration, "dma-ranges" would have been present in DT
89	 */
90	pcie->need_ib_cfg = of_property_read_bool(np, "dma-ranges");
91
92	/* PHY use is optional */
93	pcie->phy = devm_phy_optional_get(dev, "pcie-phy");
94	if (IS_ERR(pcie->phy))
95		return PTR_ERR(pcie->phy);
96
97	/* PAXC doesn't support legacy IRQs, skip mapping */
98	switch (pcie->type) {
99	case IPROC_PCIE_PAXC:
100	case IPROC_PCIE_PAXC_V2:
101		pcie->map_irq = NULL;
102		break;
103	default:
104		break;
105	}
106
107	ret = iproc_pcie_setup(pcie, &bridge->windows);
108	if (ret) {
109		dev_err(dev, "PCIe controller setup failed\n");
110		return ret;
111	}
112
113	platform_set_drvdata(pdev, pcie);
114	return 0;
115}
116
117static void iproc_pltfm_pcie_remove(struct platform_device *pdev)
118{
119	struct iproc_pcie *pcie = platform_get_drvdata(pdev);
120
121	iproc_pcie_remove(pcie);
122}
123
124static void iproc_pltfm_pcie_shutdown(struct platform_device *pdev)
125{
126	struct iproc_pcie *pcie = platform_get_drvdata(pdev);
127
128	iproc_pcie_shutdown(pcie);
129}
130
131static struct platform_driver iproc_pltfm_pcie_driver = {
132	.driver = {
133		.name = "iproc-pcie",
134		.of_match_table = of_match_ptr(iproc_pcie_of_match_table),
135	},
136	.probe = iproc_pltfm_pcie_probe,
137	.remove_new = iproc_pltfm_pcie_remove,
138	.shutdown = iproc_pltfm_pcie_shutdown,
139};
140module_platform_driver(iproc_pltfm_pcie_driver);
141
142MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
143MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
144MODULE_LICENSE("GPL v2");
145