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