1/*
2 *	Driver for Broadcom 63xx SOCs integrated PHYs
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
6 *	as published by the Free Software Foundation; either version
7 *	2 of the License, or (at your option) any later version.
8 */
9#include <linux/module.h>
10#include <linux/phy.h>
11
12#define MII_BCM63XX_IR		0x1a	/* interrupt register */
13#define MII_BCM63XX_IR_EN	0x4000	/* global interrupt enable */
14#define MII_BCM63XX_IR_DUPLEX	0x0800	/* duplex changed */
15#define MII_BCM63XX_IR_SPEED	0x0400	/* speed changed */
16#define MII_BCM63XX_IR_LINK	0x0200	/* link changed */
17#define MII_BCM63XX_IR_GMASK	0x0100	/* global interrupt mask */
18
19MODULE_DESCRIPTION("Broadcom 63xx internal PHY driver");
20MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
21MODULE_LICENSE("GPL");
22
23static int bcm63xx_config_init(struct phy_device *phydev)
24{
25	int reg, err;
26
27	reg = phy_read(phydev, MII_BCM63XX_IR);
28	if (reg < 0)
29		return reg;
30
31	/* Mask interrupts globally.  */
32	reg |= MII_BCM63XX_IR_GMASK;
33	err = phy_write(phydev, MII_BCM63XX_IR, reg);
34	if (err < 0)
35		return err;
36
37	/* Unmask events we are interested in  */
38	reg = ~(MII_BCM63XX_IR_DUPLEX |
39		MII_BCM63XX_IR_SPEED |
40		MII_BCM63XX_IR_LINK) |
41		MII_BCM63XX_IR_EN;
42	err = phy_write(phydev, MII_BCM63XX_IR, reg);
43	if (err < 0)
44		return err;
45	return 0;
46}
47
48static int bcm63xx_ack_interrupt(struct phy_device *phydev)
49{
50	int reg;
51
52	/* Clear pending interrupts.  */
53	reg = phy_read(phydev, MII_BCM63XX_IR);
54	if (reg < 0)
55		return reg;
56
57	return 0;
58}
59
60static int bcm63xx_config_intr(struct phy_device *phydev)
61{
62	int reg, err;
63
64	reg = phy_read(phydev, MII_BCM63XX_IR);
65	if (reg < 0)
66		return reg;
67
68	if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
69		reg &= ~MII_BCM63XX_IR_GMASK;
70	else
71		reg |= MII_BCM63XX_IR_GMASK;
72
73	err = phy_write(phydev, MII_BCM63XX_IR, reg);
74	return err;
75}
76
77static struct phy_driver bcm63xx_1_driver = {
78	.phy_id		= 0x00406000,
79	.phy_id_mask	= 0xfffffc00,
80	.name		= "Broadcom BCM63XX (1)",
81	/* ASYM_PAUSE bit is marked RO in datasheet, so don't cheat */
82	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause),
83	.flags		= PHY_HAS_INTERRUPT,
84	.config_init	= bcm63xx_config_init,
85	.config_aneg	= genphy_config_aneg,
86	.read_status	= genphy_read_status,
87	.ack_interrupt	= bcm63xx_ack_interrupt,
88	.config_intr	= bcm63xx_config_intr,
89	.driver		= { .owner = THIS_MODULE },
90};
91
92/* same phy as above, with just a different OUI */
93static struct phy_driver bcm63xx_2_driver = {
94	.phy_id		= 0x002bdc00,
95	.phy_id_mask	= 0xfffffc00,
96	.name		= "Broadcom BCM63XX (2)",
97	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause),
98	.flags		= PHY_HAS_INTERRUPT,
99	.config_init	= bcm63xx_config_init,
100	.config_aneg	= genphy_config_aneg,
101	.read_status	= genphy_read_status,
102	.ack_interrupt	= bcm63xx_ack_interrupt,
103	.config_intr	= bcm63xx_config_intr,
104	.driver		= { .owner = THIS_MODULE },
105};
106
107static int __init bcm63xx_phy_init(void)
108{
109	int ret;
110
111	ret = phy_driver_register(&bcm63xx_1_driver);
112	if (ret)
113		goto out_63xx_1;
114	ret = phy_driver_register(&bcm63xx_2_driver);
115	if (ret)
116		goto out_63xx_2;
117	return ret;
118
119out_63xx_2:
120	phy_driver_unregister(&bcm63xx_1_driver);
121out_63xx_1:
122	return ret;
123}
124
125static void __exit bcm63xx_phy_exit(void)
126{
127	phy_driver_unregister(&bcm63xx_1_driver);
128	phy_driver_unregister(&bcm63xx_2_driver);
129}
130
131module_init(bcm63xx_phy_init);
132module_exit(bcm63xx_phy_exit);
133
134static struct mdio_device_id __maybe_unused bcm63xx_tbl[] = {
135	{ 0x00406000, 0xfffffc00 },
136	{ 0x002bdc00, 0xfffffc00 },
137	{ }
138};
139
140MODULE_DEVICE_TABLE(mdio, bcm63xx_tbl);
141