1// SPDX-License-Identifier: GPL-2.0+
  2/*
  3 * Driver for AMD am79c PHYs
  4 *
  5 * Author: Heiko Schocher <hs@denx.de>
  6 *
  7 * Copyright (c) 2011 DENX Software Engineering GmbH
 
 
 
 
 
 
  8 */
  9#include <linux/kernel.h>
 10#include <linux/errno.h>
 11#include <linux/init.h>
 12#include <linux/module.h>
 13#include <linux/mii.h>
 14#include <linux/phy.h>
 15
 16#define PHY_ID_AC101L		0x00225520
 17#define PHY_ID_AM79C874		0x0022561b
 18
 19#define MII_AM79C_IR		17	/* Interrupt Status/Control Register */
 20#define MII_AM79C_IR_EN_LINK	0x0400	/* IR enable Linkstate */
 21#define MII_AM79C_IR_EN_ANEG	0x0100	/* IR enable Aneg Complete */
 22#define MII_AM79C_IR_IMASK_INIT	(MII_AM79C_IR_EN_LINK | MII_AM79C_IR_EN_ANEG)
 23
 24#define MII_AM79C_IR_LINK_DOWN	BIT(2)
 25#define MII_AM79C_IR_ANEG_DONE	BIT(0)
 26#define MII_AM79C_IR_IMASK_STAT	(MII_AM79C_IR_LINK_DOWN | MII_AM79C_IR_ANEG_DONE)
 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 = am79c_ack_interrupt(phydev);
 58		if (err)
 59			return err;
 60
 61		err = phy_write(phydev, MII_AM79C_IR, MII_AM79C_IR_IMASK_INIT);
 62	} else {
 63		err = phy_write(phydev, MII_AM79C_IR, 0);
 64		if (err)
 65			return err;
 66
 67		err = am79c_ack_interrupt(phydev);
 68	}
 69
 70	return err;
 71}
 72
 73static irqreturn_t am79c_handle_interrupt(struct phy_device *phydev)
 74{
 75	int irq_status;
 76
 77	irq_status = phy_read(phydev, MII_AM79C_IR);
 78	if (irq_status < 0) {
 79		phy_error(phydev);
 80		return IRQ_NONE;
 81	}
 82
 83	if (!(irq_status & MII_AM79C_IR_IMASK_STAT))
 84		return IRQ_NONE;
 85
 86	phy_trigger_machine(phydev);
 87
 88	return IRQ_HANDLED;
 89}
 90
 91static struct phy_driver am79c_drivers[] = {
 92	{
 93		.phy_id		= PHY_ID_AM79C874,
 94		.name		= "AM79C874",
 95		.phy_id_mask	= 0xfffffff0,
 96		/* PHY_BASIC_FEATURES */
 97		.config_init	= am79c_config_init,
 98		.config_intr	= am79c_config_intr,
 99		.handle_interrupt = am79c_handle_interrupt,
100	},
101	{
102		.phy_id		= PHY_ID_AC101L,
103		.name		= "AC101L",
104		.phy_id_mask	= 0xfffffff0,
105		/* PHY_BASIC_FEATURES */
106		.config_init	= am79c_config_init,
107		.config_intr	= am79c_config_intr,
108		.handle_interrupt = am79c_handle_interrupt,
109	},
110};
111
112module_phy_driver(am79c_drivers);
113
114static struct mdio_device_id __maybe_unused amd_tbl[] = {
115	{ PHY_ID_AC101L, 0xfffffff0 },
116	{ PHY_ID_AM79C874, 0xfffffff0 },
117	{ }
118};
119
120MODULE_DEVICE_TABLE(mdio, amd_tbl);

 
 1/*
 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
64static struct phy_driver am79c_driver[] = { {
65	.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} };
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
76
77module_phy_driver(am79c_driver);
78
79static struct mdio_device_id __maybe_unused amd_tbl[] = {
 
80	{ PHY_ID_AM79C874, 0xfffffff0 },
81	{ }
82};
83
84MODULE_DEVICE_TABLE(mdio, amd_tbl);