[mirror_ubuntu-artful-kernel.git] / drivers / net / phy / dp83848.c

/*
 * Driver for the Texas Instruments DP83848 PHY
 *
 * Copyright (C) 2015-2016 Texas Instruments Incorporated - http://www.ti.com/
 *
 * 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.
 *
 * 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.
 */

#include <linux/module.h>
#include <linux/phy.h>

#define TI_DP83848C_PHY_ID		0x20005ca0
#define NS_DP83848C_PHY_ID		0x20005c90
#define TLK10X_PHY_ID			0x2000a210

/* Registers */
#define DP83848_MICR			0x11 /* MII Interrupt Control Register */
#define DP83848_MISR			0x12 /* MII Interrupt Status Register */

/* MICR Register Fields */
#define DP83848_MICR_INT_OE		BIT(0) /* Interrupt Output Enable */
#define DP83848_MICR_INTEN		BIT(1) /* Interrupt Enable */

/* MISR Register Fields */
#define DP83848_MISR_RHF_INT_EN		BIT(0) /* Receive Error Counter */
#define DP83848_MISR_FHF_INT_EN		BIT(1) /* False Carrier Counter */
#define DP83848_MISR_ANC_INT_EN		BIT(2) /* Auto-negotiation complete */
#define DP83848_MISR_DUP_INT_EN		BIT(3) /* Duplex Status */
#define DP83848_MISR_SPD_INT_EN		BIT(4) /* Speed status */
#define DP83848_MISR_LINK_INT_EN	BIT(5) /* Link status */
#define DP83848_MISR_ED_INT_EN		BIT(6) /* Energy detect */
#define DP83848_MISR_LQM_INT_EN		BIT(7) /* Link Quality Monitor */

#define DP83848_INT_EN_MASK		\
	(DP83848_MISR_ANC_INT_EN |	\
	 DP83848_MISR_DUP_INT_EN |	\
	 DP83848_MISR_SPD_INT_EN |	\
	 DP83848_MISR_LINK_INT_EN)

static int dp83848_ack_interrupt(struct phy_device *phydev)
{
	int err = phy_read(phydev, DP83848_MISR);

	return err < 0 ? err : 0;
}

static int dp83848_config_intr(struct phy_device *phydev)
{
	int control, ret;

	control = phy_read(phydev, DP83848_MICR);
	if (control < 0)
		return control;

	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
		control |= DP83848_MICR_INT_OE;
		control |= DP83848_MICR_INTEN;

		ret = phy_write(phydev, DP83848_MISR, DP83848_INT_EN_MASK);
		if (ret < 0)
			return ret;
	} else {
		control &= ~DP83848_MICR_INTEN;
	}

	return phy_write(phydev, DP83848_MICR, control);
}

static struct mdio_device_id __maybe_unused dp83848_tbl[] = {
	{ TI_DP83848C_PHY_ID, 0xfffffff0 },
	{ NS_DP83848C_PHY_ID, 0xfffffff0 },
	{ TLK10X_PHY_ID, 0xfffffff0 },
	{ }
};
MODULE_DEVICE_TABLE(mdio, dp83848_tbl);

#define DP83848_PHY_DRIVER(_id, _name)				\
	{							\
		.phy_id		= _id,				\
		.phy_id_mask	= 0xfffffff0,			\
		.name		= _name,			\
		.features	= PHY_BASIC_FEATURES,		\
		.flags		= PHY_HAS_INTERRUPT,		\
								\
		.soft_reset	= genphy_soft_reset,		\
		.config_init	= genphy_config_init,		\
		.suspend	= genphy_suspend,		\
		.resume		= genphy_resume,		\
		.config_aneg	= genphy_config_aneg,		\
		.read_status	= genphy_read_status,		\
								\
		/* IRQ related */				\
		.ack_interrupt	= dp83848_ack_interrupt,	\
		.config_intr	= dp83848_config_intr,		\
	}

static struct phy_driver dp83848_driver[] = {
	DP83848_PHY_DRIVER(TI_DP83848C_PHY_ID, "TI DP83848C 10/100 Mbps PHY"),
	DP83848_PHY_DRIVER(NS_DP83848C_PHY_ID, "NS DP83848C 10/100 Mbps PHY"),
	DP83848_PHY_DRIVER(TLK10X_PHY_ID, "TI TLK10X 10/100 Mbps PHY"),
};
module_phy_driver(dp83848_driver);

MODULE_DESCRIPTION("Texas Instruments DP83848 PHY driver");
MODULE_AUTHOR("Andrew F. Davis <afd@ti.com");
MODULE_LICENSE("GPL");
Commit	Line	Data
34e45ad9 AD	1	/*
	2	* Driver for the Texas Instruments DP83848 PHY
	3	*
2f67864b	4	* Copyright (C) 2015-2016 Texas Instruments Incorporated - http://www.ti.com/
34e45ad9 AD	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*/
	15
	16	#include <linux/module.h>
	17	#include <linux/phy.h>
	18
68336293 AD	19	#define TI_DP83848C_PHY_ID 0x20005ca0
68336293 AD	20	#define NS_DP83848C_PHY_ID 0x20005c90
d1782f7b	21	#define TLK10X_PHY_ID 0x2000a210
34e45ad9 AD	22
34e45ad9 AD	23	/* Registers */
5fed0393 AD	24	#define DP83848_MICR 0x11 /* MII Interrupt Control Register */
5fed0393 AD	25	#define DP83848_MISR 0x12 /* MII Interrupt Status Register */
34e45ad9 AD	26
	27	/* MICR Register Fields */
	28	#define DP83848_MICR_INT_OE BIT(0) /* Interrupt Output Enable */
	29	#define DP83848_MICR_INTEN BIT(1) /* Interrupt Enable */
	30
	31	/* MISR Register Fields */
	32	#define DP83848_MISR_RHF_INT_EN BIT(0) /* Receive Error Counter */
	33	#define DP83848_MISR_FHF_INT_EN BIT(1) /* False Carrier Counter */
	34	#define DP83848_MISR_ANC_INT_EN BIT(2) /* Auto-negotiation complete */
	35	#define DP83848_MISR_DUP_INT_EN BIT(3) /* Duplex Status */
	36	#define DP83848_MISR_SPD_INT_EN BIT(4) /* Speed status */
	37	#define DP83848_MISR_LINK_INT_EN BIT(5) /* Link status */
	38	#define DP83848_MISR_ED_INT_EN BIT(6) /* Energy detect */
	39	#define DP83848_MISR_LQM_INT_EN BIT(7) /* Link Quality Monitor */
	40
cf13be5a AD	41	#define DP83848_INT_EN_MASK \
	42	(DP83848_MISR_ANC_INT_EN \| \
	43	DP83848_MISR_DUP_INT_EN \| \
	44	DP83848_MISR_SPD_INT_EN \| \
	45	DP83848_MISR_LINK_INT_EN)
	46
34e45ad9 AD	47	static int dp83848_ack_interrupt(struct phy_device *phydev)
	48	{
	49	int err = phy_read(phydev, DP83848_MISR);
	50
	51	return err < 0 ? err : 0;
	52	}
	53
	54	static int dp83848_config_intr(struct phy_device *phydev)
	55	{
cf13be5a AD	56	int control, ret;
	57
	58	control = phy_read(phydev, DP83848_MICR);
	59	if (control < 0)
	60	return control;
34e45ad9 AD	61
34e45ad9 AD	62	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
cf13be5a AD	63	control \|= DP83848_MICR_INT_OE;
cf13be5a AD	64	control \|= DP83848_MICR_INTEN;
34e45ad9	65
cf13be5a AD	66	ret = phy_write(phydev, DP83848_MISR, DP83848_INT_EN_MASK);
	67	if (ret < 0)
	68	return ret;
	69	} else {
	70	control &= ~DP83848_MICR_INTEN;
34e45ad9 AD	71	}
34e45ad9 AD	72
cf13be5a	73	return phy_write(phydev, DP83848_MICR, control);
34e45ad9 AD	74	}
	75
	76	static struct mdio_device_id __maybe_unused dp83848_tbl[] = {
68336293 AD	77	{ TI_DP83848C_PHY_ID, 0xfffffff0 },
68336293 AD	78	{ NS_DP83848C_PHY_ID, 0xfffffff0 },
d1782f7b	79	{ TLK10X_PHY_ID, 0xfffffff0 },
34e45ad9 AD	80	{ }
	81	};
	82	MODULE_DEVICE_TABLE(mdio, dp83848_tbl);
	83
2f67864b AD	84	#define DP83848_PHY_DRIVER(_id, _name) \
	85	{ \
	86	.phy_id = _id, \
	87	.phy_id_mask = 0xfffffff0, \
	88	.name = _name, \
	89	.features = PHY_BASIC_FEATURES, \
	90	.flags = PHY_HAS_INTERRUPT, \
	91	\
	92	.soft_reset = genphy_soft_reset, \
	93	.config_init = genphy_config_init, \
	94	.suspend = genphy_suspend, \
	95	.resume = genphy_resume, \
	96	.config_aneg = genphy_config_aneg, \
	97	.read_status = genphy_read_status, \
	98	\
	99	/* IRQ related */ \
	100	.ack_interrupt = dp83848_ack_interrupt, \
	101	.config_intr = dp83848_config_intr, \
	102	}
34e45ad9	103
2f67864b	104	static struct phy_driver dp83848_driver[] = {
68336293	105	DP83848_PHY_DRIVER(TI_DP83848C_PHY_ID, "TI DP83848C 10/100 Mbps PHY"),
e12a285c	106	DP83848_PHY_DRIVER(NS_DP83848C_PHY_ID, "NS DP83848C 10/100 Mbps PHY"),
d1782f7b	107	DP83848_PHY_DRIVER(TLK10X_PHY_ID, "TI TLK10X 10/100 Mbps PHY"),
34e45ad9 AD	108	};
	109	module_phy_driver(dp83848_driver);
	110
	111	MODULE_DESCRIPTION("Texas Instruments DP83848 PHY driver");
	112	MODULE_AUTHOR("Andrew F. Davis <afd@ti.com");
	113	MODULE_LICENSE("GPL");