2 * Driver for AMD am79c PHYs
4 * Author: Heiko Schocher <hs@denx.de>
6 * Copyright (c) 2011 DENX Software Engineering GmbH
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
14 #include <linux/kernel.h>
15 #include <linux/errno.h>
16 #include <linux/init.h>
17 #include <linux/module.h>
18 #include <linux/mii.h>
19 #include <linux/phy.h>
21 #define PHY_ID_AM79C874 0x0022561b
23 #define MII_AM79C_IR 17 /* Interrupt Status/Control Register */
24 #define MII_AM79C_IR_EN_LINK 0x0400 /* IR enable Linkstate */
25 #define MII_AM79C_IR_EN_ANEG 0x0100 /* IR enable Aneg Complete */
26 #define MII_AM79C_IR_IMASK_INIT (MII_AM79C_IR_EN_LINK | MII_AM79C_IR_EN_ANEG)
28 MODULE_DESCRIPTION("AMD PHY driver");
29 MODULE_AUTHOR("Heiko Schocher <hs@denx.de>");
30 MODULE_LICENSE("GPL");
32 static int am79c_ack_interrupt(struct phy_device *phydev)
36 err = phy_read(phydev, MII_BMSR);
40 err = phy_read(phydev, MII_AM79C_IR);
47 static int am79c_config_init(struct phy_device *phydev)
52 static int am79c_config_intr(struct phy_device *phydev)
56 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
57 err = phy_write(phydev, MII_AM79C_IR, MII_AM79C_IR_IMASK_INIT);
59 err = phy_write(phydev, MII_AM79C_IR, 0);
64 static struct phy_driver am79c_driver[] = { {
65 .phy_id = PHY_ID_AM79C874,
67 .phy_id_mask = 0xfffffff0,
68 .features = PHY_BASIC_FEATURES,
69 .flags = PHY_HAS_INTERRUPT,
70 .config_init = am79c_config_init,
71 .ack_interrupt = am79c_ack_interrupt,
72 .config_intr = am79c_config_intr,
75 module_phy_driver(am79c_driver);
77 static struct mdio_device_id __maybe_unused amd_tbl[] = {
78 { PHY_ID_AM79C874, 0xfffffff0 },
82 MODULE_DEVICE_TABLE(mdio, amd_tbl);