[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

/* Registers */
#define DP83848_MICR			0x11
#define DP83848_MISR			0x12

/* 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 },
	{ }
};
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, "TI DP83848C 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
34e45ad9 AD	21
	22	/* Registers */
	23	#define DP83848_MICR 0x11
	24	#define DP83848_MISR 0x12
	25
	26	/* MICR Register Fields */
	27	#define DP83848_MICR_INT_OE BIT(0) /* Interrupt Output Enable */
	28	#define DP83848_MICR_INTEN BIT(1) /* Interrupt Enable */
	29
	30	/* MISR Register Fields */
	31	#define DP83848_MISR_RHF_INT_EN BIT(0) /* Receive Error Counter */
	32	#define DP83848_MISR_FHF_INT_EN BIT(1) /* False Carrier Counter */
	33	#define DP83848_MISR_ANC_INT_EN BIT(2) /* Auto-negotiation complete */
	34	#define DP83848_MISR_DUP_INT_EN BIT(3) /* Duplex Status */
	35	#define DP83848_MISR_SPD_INT_EN BIT(4) /* Speed status */
	36	#define DP83848_MISR_LINK_INT_EN BIT(5) /* Link status */
	37	#define DP83848_MISR_ED_INT_EN BIT(6) /* Energy detect */
	38	#define DP83848_MISR_LQM_INT_EN BIT(7) /* Link Quality Monitor */
	39
cf13be5a AD	40	#define DP83848_INT_EN_MASK \
	41	(DP83848_MISR_ANC_INT_EN \| \
	42	DP83848_MISR_DUP_INT_EN \| \
	43	DP83848_MISR_SPD_INT_EN \| \
	44	DP83848_MISR_LINK_INT_EN)
	45
34e45ad9 AD	46	static int dp83848_ack_interrupt(struct phy_device *phydev)
	47	{
	48	int err = phy_read(phydev, DP83848_MISR);
	49
	50	return err < 0 ? err : 0;
	51	}
	52
	53	static int dp83848_config_intr(struct phy_device *phydev)
	54	{
cf13be5a AD	55	int control, ret;
	56
	57	control = phy_read(phydev, DP83848_MICR);
	58	if (control < 0)
	59	return control;
34e45ad9 AD	60
34e45ad9 AD	61	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
cf13be5a AD	62	control \|= DP83848_MICR_INT_OE;
cf13be5a AD	63	control \|= DP83848_MICR_INTEN;
34e45ad9	64
cf13be5a AD	65	ret = phy_write(phydev, DP83848_MISR, DP83848_INT_EN_MASK);
	66	if (ret < 0)
	67	return ret;
	68	} else {
	69	control &= ~DP83848_MICR_INTEN;
34e45ad9 AD	70	}
34e45ad9 AD	71
cf13be5a	72	return phy_write(phydev, DP83848_MICR, control);
34e45ad9 AD	73	}
	74
	75	static struct mdio_device_id __maybe_unused dp83848_tbl[] = {
68336293 AD	76	{ TI_DP83848C_PHY_ID, 0xfffffff0 },
68336293 AD	77	{ NS_DP83848C_PHY_ID, 0xfffffff0 },
34e45ad9 AD	78	{ }
	79	};
	80	MODULE_DEVICE_TABLE(mdio, dp83848_tbl);
	81
2f67864b AD	82	#define DP83848_PHY_DRIVER(_id, _name) \
	83	{ \
	84	.phy_id = _id, \
	85	.phy_id_mask = 0xfffffff0, \
	86	.name = _name, \
	87	.features = PHY_BASIC_FEATURES, \
	88	.flags = PHY_HAS_INTERRUPT, \
	89	\
	90	.soft_reset = genphy_soft_reset, \
	91	.config_init = genphy_config_init, \
	92	.suspend = genphy_suspend, \
	93	.resume = genphy_resume, \
	94	.config_aneg = genphy_config_aneg, \
	95	.read_status = genphy_read_status, \
	96	\
	97	/* IRQ related */ \
	98	.ack_interrupt = dp83848_ack_interrupt, \
	99	.config_intr = dp83848_config_intr, \
	100	}
34e45ad9	101
2f67864b	102	static struct phy_driver dp83848_driver[] = {
68336293 AD	103	DP83848_PHY_DRIVER(TI_DP83848C_PHY_ID, "TI DP83848C 10/100 Mbps PHY"),
68336293 AD	104	DP83848_PHY_DRIVER(NS_DP83848C_PHY_ID, "TI DP83848C 10/100 Mbps PHY"),
34e45ad9 AD	105	};
	106	module_phy_driver(dp83848_driver);
	107
	108	MODULE_DESCRIPTION("Texas Instruments DP83848 PHY driver");
	109	MODULE_AUTHOR("Andrew F. Davis <afd@ti.com");
	110	MODULE_LICENSE("GPL");