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
19 MODULE_DESCRIPTION("Broadcom 63xx internal PHY driver");
20 MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
21 MODULE_LICENSE("GPL");
22
bcm63xx_config_init(struct phy_device * phydev)23 static 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
bcm63xx_ack_interrupt(struct phy_device * phydev)45 static 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
bcm63xx_config_intr(struct phy_device * phydev)57 static 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
74 static 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,
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,
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
bcm63xx_phy_init(void)103 static int __init bcm63xx_phy_init(void)
104 {
105 return phy_drivers_register(bcm63xx_driver,
106 ARRAY_SIZE(bcm63xx_driver));
107 }
108
bcm63xx_phy_exit(void)109 static void __exit bcm63xx_phy_exit(void)
110 {
111 phy_drivers_unregister(bcm63xx_driver,
112 ARRAY_SIZE(bcm63xx_driver));
113 }
114
115 module_init(bcm63xx_phy_init);
116 module_exit(bcm63xx_phy_exit);
117
118 static struct mdio_device_id __maybe_unused bcm63xx_tbl[] = {
119 { 0x00406000, 0xfffffc00 },
120 { 0x002bdc00, 0xfffffc00 },
121 { }
122 };
123
124 MODULE_DEVICE_TABLE(mdio, bcm63xx_tbl);
125