1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0+
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Driver for AMD am79c PHYs
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Author: Heiko Schocher <hs@denx.de>
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Copyright (c) 2011 DENX Software Engineering GmbH
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun #include <linux/kernel.h>
10*4882a593Smuzhiyun #include <linux/errno.h>
11*4882a593Smuzhiyun #include <linux/init.h>
12*4882a593Smuzhiyun #include <linux/module.h>
13*4882a593Smuzhiyun #include <linux/mii.h>
14*4882a593Smuzhiyun #include <linux/phy.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #define PHY_ID_AM79C874 0x0022561b
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun #define MII_AM79C_IR 17 /* Interrupt Status/Control Register */
19*4882a593Smuzhiyun #define MII_AM79C_IR_EN_LINK 0x0400 /* IR enable Linkstate */
20*4882a593Smuzhiyun #define MII_AM79C_IR_EN_ANEG 0x0100 /* IR enable Aneg Complete */
21*4882a593Smuzhiyun #define MII_AM79C_IR_IMASK_INIT (MII_AM79C_IR_EN_LINK | MII_AM79C_IR_EN_ANEG)
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun MODULE_DESCRIPTION("AMD PHY driver");
24*4882a593Smuzhiyun MODULE_AUTHOR("Heiko Schocher <hs@denx.de>");
25*4882a593Smuzhiyun MODULE_LICENSE("GPL");
26*4882a593Smuzhiyun
am79c_ack_interrupt(struct phy_device * phydev)27*4882a593Smuzhiyun static int am79c_ack_interrupt(struct phy_device *phydev)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun int err;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun err = phy_read(phydev, MII_BMSR);
32*4882a593Smuzhiyun if (err < 0)
33*4882a593Smuzhiyun return err;
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun err = phy_read(phydev, MII_AM79C_IR);
36*4882a593Smuzhiyun if (err < 0)
37*4882a593Smuzhiyun return err;
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun return 0;
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
am79c_config_init(struct phy_device * phydev)42*4882a593Smuzhiyun static int am79c_config_init(struct phy_device *phydev)
43*4882a593Smuzhiyun {
44*4882a593Smuzhiyun return 0;
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun
am79c_config_intr(struct phy_device * phydev)47*4882a593Smuzhiyun static int am79c_config_intr(struct phy_device *phydev)
48*4882a593Smuzhiyun {
49*4882a593Smuzhiyun int err;
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
52*4882a593Smuzhiyun err = phy_write(phydev, MII_AM79C_IR, MII_AM79C_IR_IMASK_INIT);
53*4882a593Smuzhiyun else
54*4882a593Smuzhiyun err = phy_write(phydev, MII_AM79C_IR, 0);
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun return err;
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun static struct phy_driver am79c_driver[] = { {
60*4882a593Smuzhiyun .phy_id = PHY_ID_AM79C874,
61*4882a593Smuzhiyun .name = "AM79C874",
62*4882a593Smuzhiyun .phy_id_mask = 0xfffffff0,
63*4882a593Smuzhiyun /* PHY_BASIC_FEATURES */
64*4882a593Smuzhiyun .config_init = am79c_config_init,
65*4882a593Smuzhiyun .ack_interrupt = am79c_ack_interrupt,
66*4882a593Smuzhiyun .config_intr = am79c_config_intr,
67*4882a593Smuzhiyun } };
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun module_phy_driver(am79c_driver);
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun static struct mdio_device_id __maybe_unused amd_tbl[] = {
72*4882a593Smuzhiyun { PHY_ID_AM79C874, 0xfffffff0 },
73*4882a593Smuzhiyun { }
74*4882a593Smuzhiyun };
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun MODULE_DEVICE_TABLE(mdio, amd_tbl);
77