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Commit 2a10154a authored by Dan Murphy's avatar Dan Murphy Committed by David S. Miller
Browse files

net: phy: dp83867: Add TI dp83867 phy 



Add support for the TI dp83867 Gigabit ethernet phy
device.

The DP83867 is a robust, low power, fully featured
Physical Layer transceiver with integrated PMD
sublayers to support 10BASE-T, 100BASE-TX and
1000BASE-T Ethernet protocols.

Signed-off-by: default avatarDan Murphy <dmurphy@ti.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f6b59f36

Documentation/devicetree/bindings/net/ti,dp83867.txt

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* Texas Instruments - dp83867 Giga bit ethernet phy



Required properties:

	- reg - The ID number for the phy, usually a small integer

	- ti,rx_int_delay - RGMII Recieve Clock Delay - see dt-bindings/net/ti-dp83867.h

		for applicable values

	- ti,tx_int_delay - RGMII Transmit Clock Delay - see dt-bindings/net/ti-dp83867.h

		for applicable values

	- ti,fifo_depth - Transmitt FIFO depth- see dt-bindings/net/ti-dp83867.h

		for applicable values



Example:



	ethernet-phy@0 {

		reg = <0>;

		ti,rx_int_delay = <DP83867_RGMIIDCTL_2_25_NS>;

		ti,tx_int_delay = <DP83867_RGMIIDCTL_2_75_NS>;

		ti,fifo_depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;

	};

drivers/net/phy/Kconfig

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@@ -112,6 +112,11 @@ config MICREL_PHY 
	---help---

	  Supports the KSZ9021, VSC8201, KS8001 PHYs.



config DP83867_PHY

	tristate "Drivers for Texas Instruments DP83867 Gigabit PHY"

	---help---

	  Currently supports the DP83867 PHY.



config FIXED_PHY

	tristate "Driver for MDIO Bus/PHY emulation with fixed speed/link PHYs"

	depends on PHYLIB
@@ -205,7 +210,6 @@ config MDIO_BCM_UNIMAC 
	  This hardware can be found in the Broadcom GENET Ethernet MAC

	  controllers as well as some Broadcom Ethernet switches such as the

	  Starfighter 2 switches.



endif # PHYLIB



config MICREL_KS8995MA

drivers/net/phy/Makefile

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@@ -22,6 +22,7 @@ obj-$(CONFIG_MDIO_BITBANG) += mdio-bitbang.o 
obj-$(CONFIG_MDIO_GPIO)		+= mdio-gpio.o

obj-$(CONFIG_NATIONAL_PHY)	+= national.o

obj-$(CONFIG_DP83640_PHY)	+= dp83640.o

obj-$(CONFIG_DP83867_PHY)	+= dp83867.o

obj-$(CONFIG_STE10XP)		+= ste10Xp.o

obj-$(CONFIG_MICREL_PHY)	+= micrel.o

obj-$(CONFIG_MDIO_OCTEON)	+= mdio-octeon.o

drivers/net/phy/dp83867.c

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/*

 * Driver for the Texas Instruments DP83867 PHY

 *

 * Copyright (C) 2015 Texas Instruments 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.

 *

 * 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/ethtool.h>

#include <linux/kernel.h>

#include <linux/mii.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/phy.h>



#include <dt-bindings/net/ti-dp83867.h>



#define DP83867_PHY_ID		0x2000a231

#define DP83867_DEVADDR		0x1f



#define MII_DP83867_PHYCTRL	0x10

#define MII_DP83867_MICR	0x12

#define MII_DP83867_ISR		0x13

#define DP83867_CTRL		0x1f



/* Extended Registers */

#define DP83867_RGMIICTL	0x0032

#define DP83867_RGMIIDCTL	0x0086



#define DP83867_SW_RESET	BIT(15)

#define DP83867_SW_RESTART	BIT(14)



/* MICR Interrupt bits */

#define MII_DP83867_MICR_AN_ERR_INT_EN		BIT(15)

#define MII_DP83867_MICR_SPEED_CHNG_INT_EN	BIT(14)

#define MII_DP83867_MICR_DUP_MODE_CHNG_INT_EN	BIT(13)

#define MII_DP83867_MICR_PAGE_RXD_INT_EN	BIT(12)

#define MII_DP83867_MICR_AUTONEG_COMP_INT_EN	BIT(11)

#define MII_DP83867_MICR_LINK_STS_CHNG_INT_EN	BIT(10)

#define MII_DP83867_MICR_FALSE_CARRIER_INT_EN	BIT(8)

#define MII_DP83867_MICR_SLEEP_MODE_CHNG_INT_EN	BIT(4)

#define MII_DP83867_MICR_WOL_INT_EN		BIT(3)

#define MII_DP83867_MICR_XGMII_ERR_INT_EN	BIT(2)

#define MII_DP83867_MICR_POL_CHNG_INT_EN	BIT(1)

#define MII_DP83867_MICR_JABBER_INT_EN		BIT(0)



/* RGMIICTL bits */

#define DP83867_RGMII_TX_CLK_DELAY_EN		BIT(1)

#define DP83867_RGMII_RX_CLK_DELAY_EN		BIT(0)



/* PHY CTRL bits */

#define DP83867_PHYCR_FIFO_DEPTH_SHIFT		14



/* RGMIIDCTL bits */

#define DP83867_RGMII_TX_CLK_DELAY_SHIFT	4



struct dp83867_private {

	int rx_id_delay;

	int tx_id_delay;

	int fifo_depth;

};



static int dp83867_ack_interrupt(struct phy_device *phydev)

{

	int err = phy_read(phydev, MII_DP83867_ISR);



	if (err < 0)

		return err;



	return 0;

}



static int dp83867_config_intr(struct phy_device *phydev)

{

	int micr_status;



	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {

		micr_status = phy_read(phydev, MII_DP83867_MICR);

		if (micr_status < 0)

			return micr_status;



		micr_status |=

			(MII_DP83867_MICR_AN_ERR_INT_EN |

			MII_DP83867_MICR_SPEED_CHNG_INT_EN |

			MII_DP83867_MICR_DUP_MODE_CHNG_INT_EN |

			MII_DP83867_MICR_SLEEP_MODE_CHNG_INT_EN);



		return phy_write(phydev, MII_DP83867_MICR, micr_status);

	}



	micr_status = 0x0;

	return phy_write(phydev, MII_DP83867_MICR, micr_status);

}



#ifdef CONFIG_OF_MDIO

static int dp83867_of_init(struct phy_device *phydev)

{

	struct dp83867_private *dp83867 = phydev->priv;

	struct device *dev = &phydev->dev;

	struct device_node *of_node = dev->of_node;

	int ret;



	if (!of_node && dev->parent->of_node)

		of_node = dev->parent->of_node;



	if (!phydev->dev.of_node)

		return -ENODEV;



	ret = of_property_read_u32(of_node, "ti,rx_int_delay",

				   &dp83867->rx_id_delay);

	if (ret)

		return ret;



	ret = of_property_read_u32(of_node, "ti,tx_int_delay",

				   &dp83867->tx_id_delay);

	if (ret)

		return ret;



	ret = of_property_read_u32(of_node, "ti,fifo_depth",

				   &dp83867->fifo_depth);

	if (ret)

		return ret;



	return 0;

}

#else

static int dp83867_of_init(struct phy_device *phydev)

{

	return 0;

}

#endif /* CONFIG_OF_MDIO */



static int dp83867_config_init(struct phy_device *phydev)

{

	struct dp83867_private *dp83867;

	int ret;

	u16 val, delay;



	if (!phydev->priv) {

		dp83867 = devm_kzalloc(&phydev->dev, sizeof(*dp83867),

				       GFP_KERNEL);

		if (!dp83867)

			return -ENOMEM;



		phydev->priv = dp83867;

		ret = dp83867_of_init(phydev);

		if (ret)

			return ret;

	} else {

		dp83867 = (struct dp83867_private *)phydev->priv;

	}



	if (phy_interface_is_rgmii(phydev)) {

		ret = phy_write(phydev, MII_DP83867_PHYCTRL,

			(dp83867->fifo_depth << DP83867_PHYCR_FIFO_DEPTH_SHIFT));

		if (ret)

			return ret;

	}



	if ((phydev->interface >= PHY_INTERFACE_MODE_RGMII_ID) ||

	    (phydev->interface <= PHY_INTERFACE_MODE_RGMII_RXID)) {

		val = phy_read_mmd_indirect(phydev, DP83867_RGMIICTL,

					    DP83867_DEVADDR, phydev->addr);



		if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)

			val |= (DP83867_RGMII_TX_CLK_DELAY_EN | DP83867_RGMII_RX_CLK_DELAY_EN);



		if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)

			val |= DP83867_RGMII_TX_CLK_DELAY_EN;



		if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)

			val |= DP83867_RGMII_RX_CLK_DELAY_EN;



		phy_write_mmd_indirect(phydev, DP83867_RGMIICTL,

				       DP83867_DEVADDR, phydev->addr, val);



		delay = (dp83867->rx_id_delay |

			(dp83867->tx_id_delay << DP83867_RGMII_TX_CLK_DELAY_SHIFT));



		phy_write_mmd_indirect(phydev, DP83867_RGMIIDCTL,

				       DP83867_DEVADDR, phydev->addr, delay);

	}



	return 0;

}



static int dp83867_phy_reset(struct phy_device *phydev)

{

	int err;



	err = phy_write(phydev, DP83867_CTRL, DP83867_SW_RESET);

	if (err < 0)

		return err;



	return dp83867_config_init(phydev);

}



static struct phy_driver dp83867_driver[] = {

	{

		.phy_id		= DP83867_PHY_ID,

		.phy_id_mask	= 0xfffffff0,

		.name		= "TI DP83867",

		.features	= PHY_GBIT_FEATURES,

		.flags		= PHY_HAS_INTERRUPT,



		.config_init	= dp83867_config_init,

		.soft_reset	= dp83867_phy_reset,



		/* IRQ related */

		.ack_interrupt	= dp83867_ack_interrupt,

		.config_intr	= dp83867_config_intr,



		.config_aneg	= genphy_config_aneg,

		.read_status	= genphy_read_status,

		.suspend	= genphy_suspend,

		.resume		= genphy_resume,



		.driver		= {.owner = THIS_MODULE,}

	},

};

module_phy_driver(dp83867_driver);



static struct mdio_device_id __maybe_unused dp83867_tbl[] = {

	{ DP83867_PHY_ID, 0xfffffff0 },

	{ }

};



MODULE_DEVICE_TABLE(mdio, dp83867_tbl);



MODULE_DESCRIPTION("Texas Instruments DP83867 PHY driver");

MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com");

MODULE_LICENSE("GPL");

include/dt-bindings/net/ti-dp83867.h

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/*

 * Device Tree constants for the Texas Instruments DP83867 PHY

 *

 * Author: Dan Murphy <dmurphy@ti.com>

 *

 * Copyright:   (C) 2015 Texas Instruments, Inc.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * 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.

 */



#ifndef _DT_BINDINGS_TI_DP83867_H

#define _DT_BINDINGS_TI_DP83867_H



/* PHY CTRL bits */

#define DP83867_PHYCR_FIFO_DEPTH_3_B_NIB	0x00

#define DP83867_PHYCR_FIFO_DEPTH_4_B_NIB	0x01

#define DP83867_PHYCR_FIFO_DEPTH_6_B_NIB	0x02

#define DP83867_PHYCR_FIFO_DEPTH_8_B_NIB	0x03



/* RGMIIDCTL internal delay for rx and tx */

#define	DP83867_RGMIIDCTL_250_PS	0x0

#define	DP83867_RGMIIDCTL_500_PS	0x1

#define	DP83867_RGMIIDCTL_750_PS	0x2

#define	DP83867_RGMIIDCTL_1_NS		0x3

#define	DP83867_RGMIIDCTL_1_25_NS	0x4

#define	DP83867_RGMIIDCTL_1_50_NS	0x5

#define	DP83867_RGMIIDCTL_1_75_NS	0x6

#define	DP83867_RGMIIDCTL_2_00_NS	0x7

#define	DP83867_RGMIIDCTL_2_25_NS	0x8

#define	DP83867_RGMIIDCTL_2_50_NS	0x9

#define	DP83867_RGMIIDCTL_2_75_NS	0xa

#define	DP83867_RGMIIDCTL_3_00_NS	0xb

#define	DP83867_RGMIIDCTL_3_25_NS	0xc

#define	DP83867_RGMIIDCTL_3_50_NS	0xd

#define	DP83867_RGMIIDCTL_3_75_NS	0xe

#define	DP83867_RGMIIDCTL_4_00_NS	0xf



#endif