1// SPDX-License-Identifier: GPL-2.0-only
 2// Copyright (C) 2016 Broadcom
 
 
 
 
 
 
 
 
 
 
 3
 4#include <linux/device.h>
 5#include <linux/module.h>
 6#include <linux/of_mdio.h>
 7#include <linux/mdio.h>
 8#include <linux/phy.h>
 9#include <linux/phy/phy.h>
10
11#define BLK_ADDR_REG_OFFSET	0x1f
12#define PLL_AFE1_100MHZ_BLK	0x2100
13#define PLL_CLK_AMP_OFFSET	0x03
14#define PLL_CLK_AMP_2P05V	0x2b18
15
16static int ns2_pci_phy_init(struct phy *p)
17{
18	struct mdio_device *mdiodev = phy_get_drvdata(p);
19	int rc;
20
21	/* select the AFE 100MHz block page */
22	rc = mdiodev_write(mdiodev, BLK_ADDR_REG_OFFSET, PLL_AFE1_100MHZ_BLK);
 
23	if (rc)
24		goto err;
25
26	/* set the 100 MHz reference clock amplitude to 2.05 v */
27	rc = mdiodev_write(mdiodev, PLL_CLK_AMP_OFFSET, PLL_CLK_AMP_2P05V);
 
28	if (rc)
29		goto err;
30
31	return 0;
32
33err:
34	dev_err(&mdiodev->dev, "Error %d writing to phy\n", rc);
35	return rc;
36}
37
38static const struct phy_ops ns2_pci_phy_ops = {
39	.init = ns2_pci_phy_init,
40	.owner = THIS_MODULE,
41};
42
43static int ns2_pci_phy_probe(struct mdio_device *mdiodev)
44{
45	struct device *dev = &mdiodev->dev;
46	struct phy_provider *provider;
47	struct phy *phy;
48
49	phy = devm_phy_create(dev, dev->of_node, &ns2_pci_phy_ops);
50	if (IS_ERR(phy)) {
51		dev_err(dev, "failed to create Phy\n");
52		return PTR_ERR(phy);
53	}
54
55	phy_set_drvdata(phy, mdiodev);
56
57	provider = devm_of_phy_provider_register(&phy->dev,
58						 of_phy_simple_xlate);
59	if (IS_ERR(provider)) {
60		dev_err(dev, "failed to register Phy provider\n");
61		return PTR_ERR(provider);
62	}
63
64	dev_info(dev, "%s PHY registered\n", dev_name(dev));
65
66	return 0;
67}
68
69static const struct of_device_id ns2_pci_phy_of_match[] = {
70	{ .compatible = "brcm,ns2-pcie-phy", },
71	{ /* sentinel */ },
72};
73MODULE_DEVICE_TABLE(of, ns2_pci_phy_of_match);
74
75static struct mdio_driver ns2_pci_phy_driver = {
76	.mdiodrv = {
77		.driver = {
78			.name = "phy-bcm-ns2-pci",
79			.of_match_table = ns2_pci_phy_of_match,
80		},
81	},
82	.probe = ns2_pci_phy_probe,
83};
84mdio_module_driver(ns2_pci_phy_driver);
85
86MODULE_AUTHOR("Broadcom");
87MODULE_DESCRIPTION("Broadcom Northstar2 PCI Phy driver");
88MODULE_LICENSE("GPL v2");
89MODULE_ALIAS("platform:phy-bcm-ns2-pci");

  1/*
  2 * Copyright (C) 2016 Broadcom
  3 *
  4 * This program is free software; you can redistribute it and/or
  5 * modify it under the terms of the GNU General Public License as
  6 * published by the Free Software Foundation version 2.
  7 *
  8 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  9 * kind, whether express or implied; without even the implied warranty
 10 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 11 * GNU General Public License for more details.
 12 */
 13
 14#include <linux/device.h>
 15#include <linux/module.h>
 16#include <linux/of_mdio.h>
 17#include <linux/mdio.h>
 18#include <linux/phy.h>
 19#include <linux/phy/phy.h>
 20
 21#define BLK_ADDR_REG_OFFSET	0x1f
 22#define PLL_AFE1_100MHZ_BLK	0x2100
 23#define PLL_CLK_AMP_OFFSET	0x03
 24#define PLL_CLK_AMP_2P05V	0x2b18
 25
 26static int ns2_pci_phy_init(struct phy *p)
 27{
 28	struct mdio_device *mdiodev = phy_get_drvdata(p);
 29	int rc;
 30
 31	/* select the AFE 100MHz block page */
 32	rc = mdiobus_write(mdiodev->bus, mdiodev->addr,
 33			   BLK_ADDR_REG_OFFSET, PLL_AFE1_100MHZ_BLK);
 34	if (rc)
 35		goto err;
 36
 37	/* set the 100 MHz reference clock amplitude to 2.05 v */
 38	rc = mdiobus_write(mdiodev->bus, mdiodev->addr,
 39			   PLL_CLK_AMP_OFFSET, PLL_CLK_AMP_2P05V);
 40	if (rc)
 41		goto err;
 42
 43	return 0;
 44
 45err:
 46	dev_err(&mdiodev->dev, "Error %d writing to phy\n", rc);
 47	return rc;
 48}
 49
 50static const struct phy_ops ns2_pci_phy_ops = {
 51	.init = ns2_pci_phy_init,
 52	.owner = THIS_MODULE,
 53};
 54
 55static int ns2_pci_phy_probe(struct mdio_device *mdiodev)
 56{
 57	struct device *dev = &mdiodev->dev;
 58	struct phy_provider *provider;
 59	struct phy *phy;
 60
 61	phy = devm_phy_create(dev, dev->of_node, &ns2_pci_phy_ops);
 62	if (IS_ERR(phy)) {
 63		dev_err(dev, "failed to create Phy\n");
 64		return PTR_ERR(phy);
 65	}
 66
 67	phy_set_drvdata(phy, mdiodev);
 68
 69	provider = devm_of_phy_provider_register(&phy->dev,
 70						 of_phy_simple_xlate);
 71	if (IS_ERR(provider)) {
 72		dev_err(dev, "failed to register Phy provider\n");
 73		return PTR_ERR(provider);
 74	}
 75
 76	dev_info(dev, "%s PHY registered\n", dev_name(dev));
 77
 78	return 0;
 79}
 80
 81static const struct of_device_id ns2_pci_phy_of_match[] = {
 82	{ .compatible = "brcm,ns2-pcie-phy", },
 83	{ /* sentinel */ },
 84};
 85MODULE_DEVICE_TABLE(of, ns2_pci_phy_of_match);
 86
 87static struct mdio_driver ns2_pci_phy_driver = {
 88	.mdiodrv = {
 89		.driver = {
 90			.name = "phy-bcm-ns2-pci",
 91			.of_match_table = ns2_pci_phy_of_match,
 92		},
 93	},
 94	.probe = ns2_pci_phy_probe,
 95};
 96mdio_module_driver(ns2_pci_phy_driver);
 97
 98MODULE_AUTHOR("Broadcom");
 99MODULE_DESCRIPTION("Broadcom Northstar2 PCI Phy driver");
100MODULE_LICENSE("GPL v2");
101MODULE_ALIAS("platform:phy-bcm-ns2-pci");