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Heiko Schocher49099122012-03-18 11:03:05 +00001/*
2 * Driver for AMD am79c PHYs
3 *
4 * Author: Heiko Schocher <hs@denx.de>
5 *
6 * Copyright (c) 2011 DENX Software Engineering GmbH
7 *
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.
12 *
13 */
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>
20
21#define PHY_ID_AM79C874 0x0022561b
22
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)
27
28MODULE_DESCRIPTION("AMD PHY driver");
29MODULE_AUTHOR("Heiko Schocher <hs@denx.de>");
30MODULE_LICENSE("GPL");
31
32static int am79c_ack_interrupt(struct phy_device *phydev)
33{
34 int err;
35
36 err = phy_read(phydev, MII_BMSR);
37 if (err < 0)
38 return err;
39
40 err = phy_read(phydev, MII_AM79C_IR);
41 if (err < 0)
42 return err;
43
44 return 0;
45}
46
47static int am79c_config_init(struct phy_device *phydev)
48{
49 return 0;
50}
51
52static int am79c_config_intr(struct phy_device *phydev)
53{
54 int err;
55
56 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
57 err = phy_write(phydev, MII_AM79C_IR, MII_AM79C_IR_IMASK_INIT);
58 else
59 err = phy_write(phydev, MII_AM79C_IR, 0);
60
61 return err;
62}
63
Johan Hovold116dffa2014-11-11 19:45:58 +010064static struct phy_driver am79c_driver[] = { {
Heiko Schocher49099122012-03-18 11:03:05 +000065 .phy_id = PHY_ID_AM79C874,
66 .name = "AM79C874",
67 .phy_id_mask = 0xfffffff0,
68 .features = PHY_BASIC_FEATURES,
69 .flags = PHY_HAS_INTERRUPT,
70 .config_init = am79c_config_init,
71 .config_aneg = genphy_config_aneg,
72 .read_status = genphy_read_status,
73 .ack_interrupt = am79c_ack_interrupt,
74 .config_intr = am79c_config_intr,
75 .driver = { .owner = THIS_MODULE,},
Johan Hovold116dffa2014-11-11 19:45:58 +010076} };
Heiko Schocher49099122012-03-18 11:03:05 +000077
Johan Hovold116dffa2014-11-11 19:45:58 +010078module_phy_driver(am79c_driver);
Heiko Schocher49099122012-03-18 11:03:05 +000079
80static struct mdio_device_id __maybe_unused amd_tbl[] = {
81 { PHY_ID_AM79C874, 0xfffffff0 },
82 { }
83};
84
85MODULE_DEVICE_TABLE(mdio, amd_tbl);