1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2015 Broadcom Corporation
*/
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/clk.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/of_address.h>
#include <linux/of_pci.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/phy/phy.h>
#include "../pci.h"
#include "pcie-iproc.h"
static const struct of_device_id iproc_pcie_of_match_table[] = {
{
.compatible = "brcm,iproc-pcie",
.data = (int *)IPROC_PCIE_PAXB,
}, {
.compatible = "brcm,iproc-pcie-paxb-v2",
.data = (int *)IPROC_PCIE_PAXB_V2,
}, {
.compatible = "brcm,iproc-pcie-paxc",
.data = (int *)IPROC_PCIE_PAXC,
}, {
.compatible = "brcm,iproc-pcie-paxc-v2",
.data = (int *)IPROC_PCIE_PAXC_V2,
},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct iproc_pcie *pcie;
struct device_node *np = dev->of_node;
struct resource reg;
resource_size_t iobase = 0;
LIST_HEAD(resources);
struct pci_host_bridge *bridge;
int ret;
bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
if (!bridge)
return -ENOMEM;
pcie = pci_host_bridge_priv(bridge);
pcie->dev = dev;
pcie->type = (enum iproc_pcie_type) of_device_get_match_data(dev);
ret = of_address_to_resource(np, 0, ®);
if (ret < 0) {
dev_err(dev, "unable to obtain controller resources\n");
return ret;
}
pcie->base = devm_pci_remap_cfgspace(dev, reg.start,
resource_size(®));
if (!pcie->base) {
dev_err(dev, "unable to map controller registers\n");
return -ENOMEM;
}
pcie->base_addr = reg.start;
if (of_property_read_bool(np, "brcm,pcie-ob")) {
u32 val;
ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
&val);
if (ret) {
dev_err(dev,
"missing brcm,pcie-ob-axi-offset property\n");
return ret;
}
pcie->ob.axi_offset = val;
pcie->need_ob_cfg = true;
}
/*
* DT nodes are not used by all platforms that use the iProc PCIe
* core driver. For platforms that require explicit inbound mapping
* configuration, "dma-ranges" would have been present in DT
*/
pcie->need_ib_cfg = of_property_read_bool(np, "dma-ranges");
/* PHY use is optional */
pcie->phy = devm_phy_get(dev, "pcie-phy");
if (IS_ERR(pcie->phy)) {
if (PTR_ERR(pcie->phy) == -EPROBE_DEFER)
return -EPROBE_DEFER;
pcie->phy = NULL;
}
ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, &resources,
&iobase);
if (ret) {
dev_err(dev, "unable to get PCI host bridge resources\n");
return ret;
}
/* PAXC doesn't support legacy IRQs, skip mapping */
switch (pcie->type) {
case IPROC_PCIE_PAXC:
case IPROC_PCIE_PAXC_V2:
break;
default:
pcie->map_irq = of_irq_parse_and_map_pci;
}
ret = iproc_pcie_setup(pcie, &resources);
if (ret) {
dev_err(dev, "PCIe controller setup failed\n");
pci_free_resource_list(&resources);
return ret;
}
platform_set_drvdata(pdev, pcie);
return 0;
}
static int iproc_pcie_pltfm_remove(struct platform_device *pdev)
{
struct iproc_pcie *pcie = platform_get_drvdata(pdev);
return iproc_pcie_remove(pcie);
}
static void iproc_pcie_pltfm_shutdown(struct platform_device *pdev)
{
struct iproc_pcie *pcie = platform_get_drvdata(pdev);
iproc_pcie_shutdown(pcie);
}
static struct platform_driver iproc_pcie_pltfm_driver = {
.driver = {
.name = "iproc-pcie",
.of_match_table = of_match_ptr(iproc_pcie_of_match_table),
},
.probe = iproc_pcie_pltfm_probe,
.remove = iproc_pcie_pltfm_remove,
.shutdown = iproc_pcie_pltfm_shutdown,
};
module_platform_driver(iproc_pcie_pltfm_driver);
MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
MODULE_LICENSE("GPL v2");
|
