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
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2009-2016 Cavium, Inc.
*/
#include <linux/acpi.h>
#include <linux/gfp.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_mdio.h>
#include <linux/pci.h>
#include <linux/phy.h>
#include "mdio-cavium.h"
struct thunder_mdiobus_nexus {
void __iomem *bar0;
struct cavium_mdiobus *buses[4];
};
static int thunder_mdiobus_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct device_node *node;
struct fwnode_handle *fwn;
struct thunder_mdiobus_nexus *nexus;
int err;
int i;
nexus = devm_kzalloc(&pdev->dev, sizeof(*nexus), GFP_KERNEL);
if (!nexus)
return -ENOMEM;
pci_set_drvdata(pdev, nexus);
err = pcim_enable_device(pdev);
if (err) {
dev_err(&pdev->dev, "Failed to enable PCI device\n");
pci_set_drvdata(pdev, NULL);
return err;
}
err = pci_request_regions(pdev, KBUILD_MODNAME);
if (err) {
dev_err(&pdev->dev, "pci_request_regions failed\n");
goto err_disable_device;
}
nexus->bar0 = pcim_iomap(pdev, 0, pci_resource_len(pdev, 0));
if (!nexus->bar0) {
err = -ENOMEM;
goto err_release_regions;
}
i = 0;
device_for_each_child_node(&pdev->dev, fwn) {
struct resource r;
struct mii_bus *mii_bus;
struct cavium_mdiobus *bus;
union cvmx_smix_en smi_en;
/* If it is not an OF node we cannot handle it yet, so
* exit the loop.
*/
node = to_of_node(fwn);
if (!node)
break;
err = of_address_to_resource(node, 0, &r);
if (err) {
dev_err(&pdev->dev,
"Couldn't translate address for \"%pOFn\"\n",
node);
break;
}
mii_bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*bus));
if (!mii_bus)
break;
bus = mii_bus->priv;
bus->mii_bus = mii_bus;
nexus->buses[i] = bus;
i++;
bus->register_base = nexus->bar0 +
r.start - pci_resource_start(pdev, 0);
smi_en.u64 = 0;
smi_en.s.en = 1;
oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN);
bus->mii_bus->name = KBUILD_MODNAME;
snprintf(bus->mii_bus->id, MII_BUS_ID_SIZE, "%llx", r.start);
bus->mii_bus->parent = &pdev->dev;
bus->mii_bus->read = cavium_mdiobus_read_c22;
bus->mii_bus->write = cavium_mdiobus_write_c22;
bus->mii_bus->read_c45 = cavium_mdiobus_read_c45;
bus->mii_bus->write_c45 = cavium_mdiobus_write_c45;
err = of_mdiobus_register(bus->mii_bus, node);
if (err)
dev_err(&pdev->dev, "of_mdiobus_register failed\n");
dev_info(&pdev->dev, "Added bus at %llx\n", r.start);
if (i >= ARRAY_SIZE(nexus->buses))
break;
}
return 0;
err_release_regions:
pci_release_regions(pdev);
err_disable_device:
pci_set_drvdata(pdev, NULL);
return err;
}
static void thunder_mdiobus_pci_remove(struct pci_dev *pdev)
{
int i;
struct thunder_mdiobus_nexus *nexus = pci_get_drvdata(pdev);
for (i = 0; i < ARRAY_SIZE(nexus->buses); i++) {
struct cavium_mdiobus *bus = nexus->buses[i];
if (!bus)
continue;
mdiobus_unregister(bus->mii_bus);
oct_mdio_writeq(0, bus->register_base + SMI_EN);
}
pci_release_regions(pdev);
pci_set_drvdata(pdev, NULL);
}
static const struct pci_device_id thunder_mdiobus_id_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, 0xa02b) },
{ 0, } /* End of table. */
};
MODULE_DEVICE_TABLE(pci, thunder_mdiobus_id_table);
static struct pci_driver thunder_mdiobus_driver = {
.name = KBUILD_MODNAME,
.id_table = thunder_mdiobus_id_table,
.probe = thunder_mdiobus_pci_probe,
.remove = thunder_mdiobus_pci_remove,
};
module_pci_driver(thunder_mdiobus_driver);
MODULE_DESCRIPTION("Cavium ThunderX MDIO bus driver");
MODULE_LICENSE("GPL v2");
|
