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	return phy_write(phydev, MII_BCM63XX_IR, reg);
43}
44
45static int bcm63xx_ack_interrupt(struct phy_device *phydev)
46{
47	int reg;
48
49	/* Clear pending interrupts.  */
50	reg = phy_read(phydev, MII_BCM63XX_IR);
51	if (reg < 0)
52		return reg;
53
54	return 0;
55}
56
57static int bcm63xx_config_intr(struct phy_device *phydev)
58{
59	int reg, err;
60
61	reg = phy_read(phydev, MII_BCM63XX_IR);
62	if (reg < 0)
63		return reg;
64
65	if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
66		reg &= ~MII_BCM63XX_IR_GMASK;
67	else
68		reg |= MII_BCM63XX_IR_GMASK;
69
70	err = phy_write(phydev, MII_BCM63XX_IR, reg);
71	return err;
72}
73
74static struct phy_driver bcm63xx_driver[] = {
75{
76	.phy_id		= 0x00406000,
77	.phy_id_mask	= 0xfffffc00,
78	.name		= "Broadcom BCM63XX (1)",
79	/* ASYM_PAUSE bit is marked RO in datasheet, so don't cheat */
80	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause),
81	.flags		= PHY_HAS_INTERRUPT | PHY_IS_INTERNAL,
82	.config_init	= bcm63xx_config_init,
83	.config_aneg	= genphy_config_aneg,
84	.read_status	= genphy_read_status,
85	.ack_interrupt	= bcm63xx_ack_interrupt,
86	.config_intr	= bcm63xx_config_intr,
87	.driver		= { .owner = THIS_MODULE },
88}, {
89	/* same phy as above, with just a different OUI */
90	.phy_id		= 0x002bdc00,
91	.phy_id_mask	= 0xfffffc00,
92	.name		= "Broadcom BCM63XX (2)",
93	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause),
94	.flags		= PHY_HAS_INTERRUPT | PHY_IS_INTERNAL,
95	.config_init	= bcm63xx_config_init,
96	.config_aneg	= genphy_config_aneg,
97	.read_status	= genphy_read_status,
98	.ack_interrupt	= bcm63xx_ack_interrupt,
99	.config_intr	= bcm63xx_config_intr,
100	.driver		= { .owner = THIS_MODULE },
101} };
102
103static int __init bcm63xx_phy_init(void)
104{
105	return phy_drivers_register(bcm63xx_driver,
106		ARRAY_SIZE(bcm63xx_driver));
107}
108
109static void __exit bcm63xx_phy_exit(void)
110{
111	phy_drivers_unregister(bcm63xx_driver,
112		ARRAY_SIZE(bcm63xx_driver));
113}
114
115module_init(bcm63xx_phy_init);
116module_exit(bcm63xx_phy_exit);
117
118static struct mdio_device_id __maybe_unused bcm63xx_tbl[] = {
119	{ 0x00406000, 0xfffffc00 },
120	{ 0x002bdc00, 0xfffffc00 },
121	{ }
122};
123
124MODULE_DEVICE_TABLE(mdio, bcm63xx_tbl);
125