1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  *	Driver for Broadcom 63xx SOCs integrated PHYs
4  */
5 #include "bcm-phy-lib.h"
6 #include <linux/module.h>
7 #include <linux/phy.h>
8 
9 #define MII_BCM63XX_IR		0x1a	/* interrupt register */
10 #define MII_BCM63XX_IR_EN	0x4000	/* global interrupt enable */
11 #define MII_BCM63XX_IR_DUPLEX	0x0800	/* duplex changed */
12 #define MII_BCM63XX_IR_SPEED	0x0400	/* speed changed */
13 #define MII_BCM63XX_IR_LINK	0x0200	/* link changed */
14 #define MII_BCM63XX_IR_GMASK	0x0100	/* global interrupt mask */
15 
16 MODULE_DESCRIPTION("Broadcom 63xx internal PHY driver");
17 MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
18 MODULE_LICENSE("GPL");
19 
bcm63xx_config_intr(struct phy_device * phydev)20 static int bcm63xx_config_intr(struct phy_device *phydev)
21 {
22 	int reg, err;
23 
24 	reg = phy_read(phydev, MII_BCM63XX_IR);
25 	if (reg < 0)
26 		return reg;
27 
28 	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
29 		err = bcm_phy_ack_intr(phydev);
30 		if (err)
31 			return err;
32 
33 		reg &= ~MII_BCM63XX_IR_GMASK;
34 		err = phy_write(phydev, MII_BCM63XX_IR, reg);
35 	} else {
36 		reg |= MII_BCM63XX_IR_GMASK;
37 		err = phy_write(phydev, MII_BCM63XX_IR, reg);
38 		if (err)
39 			return err;
40 
41 		err = bcm_phy_ack_intr(phydev);
42 	}
43 
44 	return err;
45 }
46 
bcm63xx_config_init(struct phy_device * phydev)47 static int bcm63xx_config_init(struct phy_device *phydev)
48 {
49 	int reg, err;
50 
51 	/* ASYM_PAUSE bit is marked RO in datasheet, so don't cheat */
52 	linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported);
53 
54 	reg = phy_read(phydev, MII_BCM63XX_IR);
55 	if (reg < 0)
56 		return reg;
57 
58 	/* Mask interrupts globally.  */
59 	reg |= MII_BCM63XX_IR_GMASK;
60 	err = phy_write(phydev, MII_BCM63XX_IR, reg);
61 	if (err < 0)
62 		return err;
63 
64 	/* Unmask events we are interested in  */
65 	reg = ~(MII_BCM63XX_IR_DUPLEX |
66 		MII_BCM63XX_IR_SPEED |
67 		MII_BCM63XX_IR_LINK) |
68 		MII_BCM63XX_IR_EN;
69 	return phy_write(phydev, MII_BCM63XX_IR, reg);
70 }
71 
72 static struct phy_driver bcm63xx_driver[] = {
73 {
74 	.phy_id		= 0x00406000,
75 	.phy_id_mask	= 0xfffffc00,
76 	.name		= "Broadcom BCM63XX (1)",
77 	/* PHY_BASIC_FEATURES */
78 	.flags		= PHY_IS_INTERNAL,
79 	.config_init	= bcm63xx_config_init,
80 	.config_intr	= bcm63xx_config_intr,
81 	.handle_interrupt = bcm_phy_handle_interrupt,
82 }, {
83 	/* same phy as above, with just a different OUI */
84 	.phy_id		= 0x002bdc00,
85 	.phy_id_mask	= 0xfffffc00,
86 	.name		= "Broadcom BCM63XX (2)",
87 	/* PHY_BASIC_FEATURES */
88 	.flags		= PHY_IS_INTERNAL,
89 	.config_init	= bcm63xx_config_init,
90 	.config_intr	= bcm63xx_config_intr,
91 	.handle_interrupt = bcm_phy_handle_interrupt,
92 } };
93 
94 module_phy_driver(bcm63xx_driver);
95 
96 static struct mdio_device_id __maybe_unused bcm63xx_tbl[] = {
97 	{ 0x00406000, 0xfffffc00 },
98 	{ 0x002bdc00, 0xfffffc00 },
99 	{ }
100 };
101 
102 MODULE_DEVICE_TABLE(mdio, bcm63xx_tbl);
103