[mirror_ubuntu-bionic-kernel.git] / drivers / net / phy / icplus.c

/*
 * Driver for ICPlus PHYs
 *
 * Copyright (c) 2007 Freescale Semiconductor, Inc.
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 */
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>

#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>

MODULE_DESCRIPTION("ICPlus IP175C PHY driver");
MODULE_AUTHOR("Michael Barkowski");
MODULE_LICENSE("GPL");

static int ip175c_config_init(struct phy_device *phydev)
{
	int err, i;
	static int full_reset_performed = 0;

	if (full_reset_performed == 0) {

		/* master reset */
		err = phydev->bus->write(phydev->bus, 30, 0, 0x175c);
		if (err < 0)
			return err;

		/* ensure no bus delays overlap reset period */
		err = phydev->bus->read(phydev->bus, 30, 0);

		/* data sheet specifies reset period is 2 msec */
		mdelay(2);

		/* enable IP175C mode */
		err = phydev->bus->write(phydev->bus, 29, 31, 0x175c);
		if (err < 0)
			return err;

		/* Set MII0 speed and duplex (in PHY mode) */
		err = phydev->bus->write(phydev->bus, 29, 22, 0x420);
		if (err < 0)
			return err;

		/* reset switch ports */
		for (i = 0; i < 5; i++) {
			err = phydev->bus->write(phydev->bus, i,
						 MII_BMCR, BMCR_RESET);
			if (err < 0)
				return err;
		}

		for (i = 0; i < 5; i++)
			err = phydev->bus->read(phydev->bus, i, MII_BMCR);

		mdelay(2);

		full_reset_performed = 1;
	}

	if (phydev->addr != 4) {
		phydev->state = PHY_RUNNING;
		phydev->speed = SPEED_100;
		phydev->duplex = DUPLEX_FULL;
		phydev->link = 1;
		netif_carrier_on(phydev->attached_dev);
	}

	return 0;
}

static int ip175c_read_status(struct phy_device *phydev)
{
	if (phydev->addr == 4) /* WAN port */
		genphy_read_status(phydev);
	else
		/* Don't need to read status for switch ports */
		phydev->irq = PHY_IGNORE_INTERRUPT;

	return 0;
}

static int ip175c_config_aneg(struct phy_device *phydev)
{
	if (phydev->addr == 4) /* WAN port */
		genphy_config_aneg(phydev);

	return 0;
}

static struct phy_driver ip175c_driver = {
	.phy_id		= 0x02430d80,
	.name		= "ICPlus IP175C",
	.phy_id_mask	= 0x0ffffff0,
	.features	= PHY_BASIC_FEATURES,
	.config_init	= &ip175c_config_init,
	.config_aneg	= &ip175c_config_aneg,
	.read_status	= &ip175c_read_status,
	.driver		= { .owner = THIS_MODULE,},
};

static int __init ip175c_init(void)
{
	return phy_driver_register(&ip175c_driver);
}

static void __exit ip175c_exit(void)
{
	phy_driver_unregister(&ip175c_driver);
}

module_init(ip175c_init);
module_exit(ip175c_exit);
Commit	Line	Data
0cefeeba MB	1	/*
	2	* Driver for ICPlus PHYs
	3	*
	4	* Copyright (c) 2007 Freescale Semiconductor, Inc.
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; either version 2 of the License, or (at your
	9	* option) any later version.
	10	*
	11	*/
	12	#include <linux/kernel.h>
	13	#include <linux/string.h>
	14	#include <linux/errno.h>
	15	#include <linux/unistd.h>
0cefeeba MB	16	#include <linux/interrupt.h>
	17	#include <linux/init.h>
	18	#include <linux/delay.h>
	19	#include <linux/netdevice.h>
	20	#include <linux/etherdevice.h>
	21	#include <linux/skbuff.h>
	22	#include <linux/spinlock.h>
	23	#include <linux/mm.h>
	24	#include <linux/module.h>
	25	#include <linux/mii.h>
	26	#include <linux/ethtool.h>
	27	#include <linux/phy.h>
	28
	29	#include <asm/io.h>
	30	#include <asm/irq.h>
	31	#include <asm/uaccess.h>
	32
	33	MODULE_DESCRIPTION("ICPlus IP175C PHY driver");
	34	MODULE_AUTHOR("Michael Barkowski");
	35	MODULE_LICENSE("GPL");
	36
	37	static int ip175c_config_init(struct phy_device *phydev)
	38	{
	39	int err, i;
	40	static int full_reset_performed = 0;
	41
	42	if (full_reset_performed == 0) {
	43
	44	/* master reset */
	45	err = phydev->bus->write(phydev->bus, 30, 0, 0x175c);
	46	if (err < 0)
	47	return err;
	48
	49	/* ensure no bus delays overlap reset period */
	50	err = phydev->bus->read(phydev->bus, 30, 0);
	51
	52	/* data sheet specifies reset period is 2 msec */
	53	mdelay(2);
	54
	55	/* enable IP175C mode */
	56	err = phydev->bus->write(phydev->bus, 29, 31, 0x175c);
	57	if (err < 0)
	58	return err;
	59
	60	/* Set MII0 speed and duplex (in PHY mode) */
	61	err = phydev->bus->write(phydev->bus, 29, 22, 0x420);
	62	if (err < 0)
	63	return err;
	64
	65	/* reset switch ports */
	66	for (i = 0; i < 5; i++) {
	67	err = phydev->bus->write(phydev->bus, i,
	68	MII_BMCR, BMCR_RESET);
	69	if (err < 0)
	70	return err;
	71	}
	72
	73	for (i = 0; i < 5; i++)
	74	err = phydev->bus->read(phydev->bus, i, MII_BMCR);
	75
	76	mdelay(2);
	77
	78	full_reset_performed = 1;
	79	}
80
81	if (phydev->addr != 4) {
82	phydev->state = PHY_RUNNING;
83	phydev->speed = SPEED_100;
84	phydev->duplex = DUPLEX_FULL;
85	phydev->link = 1;
86	netif_carrier_on(phydev->attached_dev);
87	}
88
89	return 0;
90	}
91
92	static int ip175c_read_status(struct phy_device *phydev)
93	{
94	if (phydev->addr == 4) /* WAN port */
95	genphy_read_status(phydev);
96	else
97	/* Don't need to read status for switch ports */
98	phydev->irq = PHY_IGNORE_INTERRUPT;
99
100	return 0;
101	}
102
103	static int ip175c_config_aneg(struct phy_device *phydev)
104	{
105	if (phydev->addr == 4) /* WAN port */
106	genphy_config_aneg(phydev);
107
108	return 0;
109	}
110
111	static struct phy_driver ip175c_driver = {
112	.phy_id = 0x02430d80,
113	.name = "ICPlus IP175C",
114	.phy_id_mask = 0x0ffffff0,
115	.features = PHY_BASIC_FEATURES,
116	.config_init = &ip175c_config_init,
117	.config_aneg = &ip175c_config_aneg,
118	.read_status = &ip175c_read_status,
119	.driver = { .owner = THIS_MODULE,},
120	};
121
122	static int __init ip175c_init(void)
123	{
124	return phy_driver_register(&ip175c_driver);
125	}
126
127	static void __exit ip175c_exit(void)
128	{
129	phy_driver_unregister(&ip175c_driver);
130	}
131
132	module_init(ip175c_init);
133	module_exit(ip175c_exit);