1/*
 2 * Amlogic Meson GXL Internal PHY Driver
 3 *
 4 * Copyright (C) 2015 Amlogic, Inc. All rights reserved.
 5 * Copyright (C) 2016 BayLibre, SAS. All rights reserved.
 6 * Author: Neil Armstrong <narmstrong@baylibre.com>
 7 *
 8 * This program is free software; you can redistribute it and/or modify
 9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
16 * more details.
17 *
18 */
19#include <linux/kernel.h>
20#include <linux/module.h>
21#include <linux/mii.h>
22#include <linux/ethtool.h>
23#include <linux/phy.h>
24#include <linux/netdevice.h>
25
26static int meson_gxl_config_init(struct phy_device *phydev)
27{
28	/* Enable Analog and DSP register Bank access by */
29	phy_write(phydev, 0x14, 0x0000);
30	phy_write(phydev, 0x14, 0x0400);
31	phy_write(phydev, 0x14, 0x0000);
32	phy_write(phydev, 0x14, 0x0400);
33
34	/* Write Analog register 23 */
35	phy_write(phydev, 0x17, 0x8E0D);
36	phy_write(phydev, 0x14, 0x4417);
37
38	/* Enable fractional PLL */
39	phy_write(phydev, 0x17, 0x0005);
40	phy_write(phydev, 0x14, 0x5C1B);
41
42	/* Program fraction FR_PLL_DIV1 */
43	phy_write(phydev, 0x17, 0x029A);
44	phy_write(phydev, 0x14, 0x5C1D);
45
46	/* Program fraction FR_PLL_DIV1 */
47	phy_write(phydev, 0x17, 0xAAAA);
48	phy_write(phydev, 0x14, 0x5C1C);
49
50	return 0;
51}
52
53static struct phy_driver meson_gxl_phy[] = {
54	{
55		.phy_id		= 0x01814400,
56		.phy_id_mask	= 0xfffffff0,
57		.name		= "Meson GXL Internal PHY",
58		.features	= PHY_BASIC_FEATURES,
59		.flags		= PHY_IS_INTERNAL,
60		.config_init	= meson_gxl_config_init,
61		.config_aneg	= genphy_config_aneg,
62		.aneg_done      = genphy_aneg_done,
63		.read_status	= genphy_read_status,
64		.suspend        = genphy_suspend,
65		.resume         = genphy_resume,
66	},
67};
68
69static struct mdio_device_id __maybe_unused meson_gxl_tbl[] = {
70	{ 0x01814400, 0xfffffff0 },
71	{ }
72};
73
74module_phy_driver(meson_gxl_phy);
75
76MODULE_DEVICE_TABLE(mdio, meson_gxl_tbl);
77
78MODULE_DESCRIPTION("Amlogic Meson GXL Internal PHY driver");
79MODULE_AUTHOR("Baoqi wang");
80MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
81MODULE_LICENSE("GPL");