[deliverable/linux.git] / drivers / net / phy / microchip.c

/*
 * Copyright (C) 2015 Microchip Technology
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <linux/microchipphy.h>

#define DRIVER_AUTHOR	"WOOJUNG HUH <woojung.huh@microchip.com>"
#define DRIVER_DESC	"Microchip LAN88XX PHY driver"

struct lan88xx_priv {
	int	chip_id;
	int	chip_rev;
	__u32	wolopts;
};

static int lan88xx_phy_config_intr(struct phy_device *phydev)
{
	int rc;

	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
		/* unmask all source and clear them before enable */
		rc = phy_write(phydev, LAN88XX_INT_MASK, 0x7FFF);
		rc = phy_read(phydev, LAN88XX_INT_STS);
		rc = phy_write(phydev, LAN88XX_INT_MASK,
			       LAN88XX_INT_MASK_MDINTPIN_EN_ |
			       LAN88XX_INT_MASK_LINK_CHANGE_);
	} else {
		rc = phy_write(phydev, LAN88XX_INT_MASK, 0);
	}

	return rc < 0 ? rc : 0;
}

static int lan88xx_phy_ack_interrupt(struct phy_device *phydev)
{
	int rc = phy_read(phydev, LAN88XX_INT_STS);

	return rc < 0 ? rc : 0;
}

int lan88xx_suspend(struct phy_device *phydev)
{
	struct lan88xx_priv *priv = phydev->priv;

	/* do not power down PHY when WOL is enabled */
	if (!priv->wolopts)
		genphy_suspend(phydev);

	return 0;
}

static int lan88xx_probe(struct phy_device *phydev)
{
	struct device *dev = &phydev->dev;
	struct lan88xx_priv *priv;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->wolopts = 0;

	/* these values can be used to identify internal PHY */
	priv->chip_id = phy_read_mmd_indirect(phydev, LAN88XX_MMD3_CHIP_ID,
					      3, phydev->addr);
	priv->chip_rev = phy_read_mmd_indirect(phydev, LAN88XX_MMD3_CHIP_REV,
					       3, phydev->addr);

	phydev->priv = priv;

	return 0;
}

static void lan88xx_remove(struct phy_device *phydev)
{
	struct device *dev = &phydev->dev;
	struct lan88xx_priv *priv = phydev->priv;

	if (priv)
		devm_kfree(dev, priv);
}

static int lan88xx_set_wol(struct phy_device *phydev,
			   struct ethtool_wolinfo *wol)
{
	struct lan88xx_priv *priv = phydev->priv;

	priv->wolopts = wol->wolopts;

	return 0;
}

static struct phy_driver microchip_phy_driver[] = {
{
	.phy_id		= 0x0007c130,
	.phy_id_mask	= 0xfffffff0,
	.name		= "Microchip LAN88xx",

	.features	= (PHY_GBIT_FEATURES |
			   SUPPORTED_Pause | SUPPORTED_Asym_Pause),
	.flags		= PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,

	.probe		= lan88xx_probe,
	.remove		= lan88xx_remove,

	.config_init	= genphy_config_init,
	.config_aneg	= genphy_config_aneg,
	.read_status	= genphy_read_status,

	.ack_interrupt	= lan88xx_phy_ack_interrupt,
	.config_intr	= lan88xx_phy_config_intr,

	.suspend	= lan88xx_suspend,
	.resume		= genphy_resume,
	.set_wol	= lan88xx_set_wol,

	.driver		= { .owner = THIS_MODULE, }
} };

module_phy_driver(microchip_phy_driver);

static struct mdio_device_id __maybe_unused microchip_tbl[] = {
	{ 0x0007c130, 0xfffffff0 },
	{ }
};

MODULE_DEVICE_TABLE(mdio, microchip_tbl);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
Commit	Line	Data
792aec47 WH	1	/*
	2	* Copyright (C) 2015 Microchip Technology
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version 2
	7	* of the License, or (at your option) any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, see <http://www.gnu.org/licenses/>.
	16	*/
	17	#include <linux/kernel.h>
	18	#include <linux/module.h>
	19	#include <linux/mii.h>
	20	#include <linux/ethtool.h>
	21	#include <linux/phy.h>
	22	#include <linux/microchipphy.h>
	23
	24	#define DRIVER_AUTHOR "WOOJUNG HUH <woojung.huh@microchip.com>"
	25	#define DRIVER_DESC "Microchip LAN88XX PHY driver"
	26
	27	struct lan88xx_priv {
	28	int chip_id;
	29	int chip_rev;
	30	__u32 wolopts;
	31	};
	32
	33	static int lan88xx_phy_config_intr(struct phy_device *phydev)
	34	{
	35	int rc;
	36
	37	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
	38	/* unmask all source and clear them before enable */
	39	rc = phy_write(phydev, LAN88XX_INT_MASK, 0x7FFF);
	40	rc = phy_read(phydev, LAN88XX_INT_STS);
	41	rc = phy_write(phydev, LAN88XX_INT_MASK,
	42	LAN88XX_INT_MASK_MDINTPIN_EN_ \|
	43	LAN88XX_INT_MASK_LINK_CHANGE_);
	44	} else {
	45	rc = phy_write(phydev, LAN88XX_INT_MASK, 0);
	46	}
	47
	48	return rc < 0 ? rc : 0;
	49	}
	50
	51	static int lan88xx_phy_ack_interrupt(struct phy_device *phydev)
	52	{
	53	int rc = phy_read(phydev, LAN88XX_INT_STS);
	54
	55	return rc < 0 ? rc : 0;
	56	}
	57
	58	int lan88xx_suspend(struct phy_device *phydev)
	59	{
	60	struct lan88xx_priv *priv = phydev->priv;
	61
	62	/* do not power down PHY when WOL is enabled */
	63	if (!priv->wolopts)
	64	genphy_suspend(phydev);
65
66	return 0;
67	}
68
69	static int lan88xx_probe(struct phy_device *phydev)
70	{
71	struct device *dev = &phydev->dev;
72	struct lan88xx_priv *priv;
73
74	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
75	if (!priv)
76	return -ENOMEM;
77
78	priv->wolopts = 0;
79
80	/* these values can be used to identify internal PHY */
81	priv->chip_id = phy_read_mmd_indirect(phydev, LAN88XX_MMD3_CHIP_ID,
82	3, phydev->addr);
83	priv->chip_rev = phy_read_mmd_indirect(phydev, LAN88XX_MMD3_CHIP_REV,
84	3, phydev->addr);
85
86	phydev->priv = priv;
87
88	return 0;
89	}
90
91	static void lan88xx_remove(struct phy_device *phydev)
92	{
93	struct device *dev = &phydev->dev;
94	struct lan88xx_priv *priv = phydev->priv;
95
96	if (priv)
97	devm_kfree(dev, priv);
98	}
99
100	static int lan88xx_set_wol(struct phy_device *phydev,
101	struct ethtool_wolinfo *wol)
102	{
103	struct lan88xx_priv *priv = phydev->priv;
104
105	priv->wolopts = wol->wolopts;
106
107	return 0;
108	}
109
110	static struct phy_driver microchip_phy_driver[] = {
111	{
112	.phy_id = 0x0007c130,
113	.phy_id_mask = 0xfffffff0,
114	.name = "Microchip LAN88xx",
115
116	.features = (PHY_GBIT_FEATURES \|
117	SUPPORTED_Pause \| SUPPORTED_Asym_Pause),
118	.flags = PHY_HAS_INTERRUPT \| PHY_HAS_MAGICANEG,
119
120	.probe = lan88xx_probe,
121	.remove = lan88xx_remove,
122
123	.config_init = genphy_config_init,
124	.config_aneg = genphy_config_aneg,
125	.read_status = genphy_read_status,
126
127	.ack_interrupt = lan88xx_phy_ack_interrupt,
128	.config_intr = lan88xx_phy_config_intr,
129
130	.suspend = lan88xx_suspend,
131	.resume = genphy_resume,
132	.set_wol = lan88xx_set_wol,
133
134	.driver = { .owner = THIS_MODULE, }
135	} };
136
137	module_phy_driver(microchip_phy_driver);
138
139	static struct mdio_device_id __maybe_unused microchip_tbl[] = {
140	{ 0x0007c130, 0xfffffff0 },
141	{ }
142	};
143
144	MODULE_DEVICE_TABLE(mdio, microchip_tbl);
145
146	MODULE_AUTHOR(DRIVER_AUTHOR);
147	MODULE_DESCRIPTION(DRIVER_DESC);
148	MODULE_LICENSE("GPL");