tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2009-2015 Cavium, Inc.
4 */
5
6#include <linux/gfp.h>
7#include <linux/io.h>
8#include <linux/module.h>
9#include <linux/of_address.h>
10#include <linux/of_mdio.h>
11#include <linux/phy.h>
12#include <linux/platform_device.h>
13
14#include "mdio-cavium.h"
15
16static int octeon_mdiobus_probe(struct platform_device *pdev)
17{
18 struct cavium_mdiobus *bus;
19 struct mii_bus *mii_bus;
20 union cvmx_smix_en smi_en;
21 int err;
22
23 mii_bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*bus));
24 if (!mii_bus)
25 return -ENOMEM;
26
27 bus = mii_bus->priv;
28 bus->mii_bus = mii_bus;
29
30 bus->register_base = devm_platform_ioremap_resource(pdev, 0);
31 if (IS_ERR(bus->register_base)) {
32 dev_err(&pdev->dev, "dev_ioremap failed\n");
33 return PTR_ERR(bus->register_base);
34 }
35
36 smi_en.u64 = 0;
37 smi_en.s.en = 1;
38 oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN);
39
40 bus->mii_bus->name = KBUILD_MODNAME;
41 snprintf(bus->mii_bus->id, MII_BUS_ID_SIZE, "%px", bus->register_base);
42 bus->mii_bus->parent = &pdev->dev;
43
44 bus->mii_bus->read = cavium_mdiobus_read_c22;
45 bus->mii_bus->write = cavium_mdiobus_write_c22;
46 bus->mii_bus->read_c45 = cavium_mdiobus_read_c45;
47 bus->mii_bus->write_c45 = cavium_mdiobus_write_c45;
48
49 platform_set_drvdata(pdev, bus);
50
51 err = of_mdiobus_register(bus->mii_bus, pdev->dev.of_node);
52 if (err)
53 goto fail_register;
54
55 dev_info(&pdev->dev, "Probed\n");
56
57 return 0;
58fail_register:
59 smi_en.u64 = 0;
60 oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN);
61 return err;
62}
63
64static void octeon_mdiobus_remove(struct platform_device *pdev)
65{
66 struct cavium_mdiobus *bus;
67 union cvmx_smix_en smi_en;
68
69 bus = platform_get_drvdata(pdev);
70
71 mdiobus_unregister(bus->mii_bus);
72 smi_en.u64 = 0;
73 oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN);
74}
75
76static const struct of_device_id octeon_mdiobus_match[] = {
77 {
78 .compatible = "cavium,octeon-3860-mdio",
79 },
80 {},
81};
82MODULE_DEVICE_TABLE(of, octeon_mdiobus_match);
83
84static struct platform_driver octeon_mdiobus_driver = {
85 .driver = {
86 .name = KBUILD_MODNAME,
87 .of_match_table = octeon_mdiobus_match,
88 },
89 .probe = octeon_mdiobus_probe,
90 .remove = octeon_mdiobus_remove,
91};
92
93module_platform_driver(octeon_mdiobus_driver);
94
95MODULE_DESCRIPTION("Cavium OCTEON MDIO bus driver");
96MODULE_AUTHOR("David Daney");
97MODULE_LICENSE("GPL v2");