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 reg &= ~MII_BCM63XX_IR_GMASK;
30 else
31 reg |= MII_BCM63XX_IR_GMASK;
32
33 err = phy_write(phydev, MII_BCM63XX_IR, reg);
34 return err;
35 }
36
bcm63xx_config_init(struct phy_device * phydev)37 static int bcm63xx_config_init(struct phy_device *phydev)
38 {
39 int reg, err;
40
41 /* ASYM_PAUSE bit is marked RO in datasheet, so don't cheat */
42 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported);
43
44 reg = phy_read(phydev, MII_BCM63XX_IR);
45 if (reg < 0)
46 return reg;
47
48 /* Mask interrupts globally. */
49 reg |= MII_BCM63XX_IR_GMASK;
50 err = phy_write(phydev, MII_BCM63XX_IR, reg);
51 if (err < 0)
52 return err;
53
54 /* Unmask events we are interested in */
55 reg = ~(MII_BCM63XX_IR_DUPLEX |
56 MII_BCM63XX_IR_SPEED |
57 MII_BCM63XX_IR_LINK) |
58 MII_BCM63XX_IR_EN;
59 return phy_write(phydev, MII_BCM63XX_IR, reg);
60 }
61
62 static struct phy_driver bcm63xx_driver[] = {
63 {
64 .phy_id = 0x00406000,
65 .phy_id_mask = 0xfffffc00,
66 .name = "Broadcom BCM63XX (1)",
67 /* PHY_BASIC_FEATURES */
68 .flags = PHY_IS_INTERNAL,
69 .config_init = bcm63xx_config_init,
70 .ack_interrupt = bcm_phy_ack_intr,
71 .config_intr = bcm63xx_config_intr,
72 }, {
73 /* same phy as above, with just a different OUI */
74 .phy_id = 0x002bdc00,
75 .phy_id_mask = 0xfffffc00,
76 .name = "Broadcom BCM63XX (2)",
77 /* PHY_BASIC_FEATURES */
78 .flags = PHY_IS_INTERNAL,
79 .config_init = bcm63xx_config_init,
80 .ack_interrupt = bcm_phy_ack_intr,
81 .config_intr = bcm63xx_config_intr,
82 } };
83
84 module_phy_driver(bcm63xx_driver);
85
86 static struct mdio_device_id __maybe_unused bcm63xx_tbl[] = {
87 { 0x00406000, 0xfffffc00 },
88 { 0x002bdc00, 0xfffffc00 },
89 { }
90 };
91
92 MODULE_DEVICE_TABLE(mdio, bcm63xx_tbl);
93