Commit d50736a8 authored by Raju Lakkaraju's avatar Raju Lakkaraju Committed by David S. Miller
Browse files

Microsemi VSC 8531/41 PHY Driver 



Hello,

I added all review comments and re-sending for review.

>From a5017f5878a92d2acec86a6a29b1498c457cb73a Mon Sep 17 00:00:00 2001
From: Nagaraju Lakkaraju <Raju.Lakkaraju@microsemi.com>
Date: Wed, 3 Aug 2016 18:28:24 +0530
Subject: [PATCH v2] net: phy: Add drivers for Microsemi PHYs

Signed-off-by: default avatarNagaraju Lakkaraju <Raju.Lakkaraju@microsemi.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 07bf2e11

drivers/net/phy/Kconfig

+5 −0
Original line number Diff line number Diff line
@@ -307,6 +307,11 @@ config MDIO_XGENE 
	  This module provides a driver for the MDIO busses found in the

	  APM X-Gene SoC's.



config MICROSEMI_PHY

    tristate "Drivers for the Microsemi PHYs"

    ---help---

      Currently supports the VSC8531 and VSC8541 PHYs



endif # PHYLIB



config MICREL_KS8995MA

drivers/net/phy/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ obj-$(CONFIG_CICADA_PHY) += cicada.o 
obj-$(CONFIG_LXT_PHY)		+= lxt.o

obj-$(CONFIG_QSEMI_PHY)		+= qsemi.o

obj-$(CONFIG_SMSC_PHY)		+= smsc.o

obj-$(CONFIG_MICROSEMI_PHY) += mscc.o

obj-$(CONFIG_TERANETICS_PHY)	+= teranetics.o

obj-$(CONFIG_VITESSE_PHY)	+= vitesse.o

obj-$(CONFIG_BCM_NET_PHYLIB)	+= bcm-phy-lib.o

drivers/net/phy/mscc.c

0 → 100644
+161 −0
Original line number Diff line number Diff line 
/*

 * Driver for Microsemi VSC85xx PHYs

 *

 * Author: Nagaraju Lakkaraju

 * License: Dual MIT/GPL

 * Copyright (c) 2016 Microsemi Corporation

 */



#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/mdio.h>

#include <linux/mii.h>

#include <linux/phy.h>



enum rgmii_rx_clock_delay {

       RGMII_RX_CLK_DELAY_0_2_NS = 0,

       RGMII_RX_CLK_DELAY_0_8_NS = 1,

       RGMII_RX_CLK_DELAY_1_1_NS = 2,

       RGMII_RX_CLK_DELAY_1_7_NS = 3,

       RGMII_RX_CLK_DELAY_2_0_NS = 4,

       RGMII_RX_CLK_DELAY_2_3_NS = 5,

       RGMII_RX_CLK_DELAY_2_6_NS = 6,

       RGMII_RX_CLK_DELAY_3_4_NS = 7

};



#define MII_VSC85XX_INT_MASK              25

#define MII_VSC85XX_INT_MASK_MASK         0xa000

#define MII_VSC85XX_INT_STATUS            26



#define MSCC_EXT_PAGE_ACCESS              31

#define MSCC_PHY_PAGE_STANDARD            0x0000 /* Standard registers */

#define MSCC_PHY_PAGE_EXTENDED_2          0x0002 /* Extended reg - page 2 */



/* Extended Page 2 Registers */

#define MSCC_PHY_RGMII_CNTL                       20

#define RGMII_RX_CLK_DELAY_MASK                   0x0070

#define RGMII_RX_CLK_DELAY_POS            4



/* Microsemi PHY ID's */

#define PHY_ID_VSC8531                            0x00070570

#define PHY_ID_VSC8541                            0x00070770



static int vsc85xx_phy_page_set(struct phy_device *phydev, u8 page)

{

       int rc;



       rc = phy_write(phydev, MSCC_EXT_PAGE_ACCESS, page);

       return rc;

}



static int vsc85xx_default_config(struct phy_device *phydev)

{

       int rc;

       u16 reg_val;



       mutex_lock(&phydev->lock);

       rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_EXTENDED_2);

       if (rc != 0)

               goto out_unlock;



       reg_val = phy_read(phydev, MSCC_PHY_RGMII_CNTL);

       reg_val &= ~(RGMII_RX_CLK_DELAY_MASK);

       reg_val |= (RGMII_RX_CLK_DELAY_1_1_NS << RGMII_RX_CLK_DELAY_POS);

       phy_write(phydev, MSCC_PHY_RGMII_CNTL, reg_val);

       rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_STANDARD);



out_unlock:

       mutex_unlock(&phydev->lock);



       return rc;

}



static int vsc85xx_config_init(struct phy_device *phydev)

{

       int rc;



       rc = vsc85xx_default_config(phydev);

       if (rc)

               return rc;

       rc = genphy_config_init(phydev);



       return rc;

}



static int vsc85xx_ack_interrupt(struct phy_device *phydev)

{

       int rc;



       if (phydev->interrupts == PHY_INTERRUPT_ENABLED)

               rc = phy_read(phydev, MII_VSC85XX_INT_STATUS);



       return (rc < 0) ? rc : 0;

}



static int vsc85xx_config_intr(struct phy_device *phydev)

{

       int rc;



       if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {

               rc = phy_write(phydev, MII_VSC85XX_INT_MASK,

                                  MII_VSC85XX_INT_MASK_MASK);

       } else {

               rc = phy_write(phydev, MII_VSC85XX_INT_MASK, 0);

               if (rc < 0)

                       return rc;

               rc = phy_read(phydev, MII_VSC85XX_INT_STATUS);

       }



       return rc;

}



/* Microsemi VSC85xx PHYs */

static struct phy_driver vsc85xx_driver[] = {

{

       .phy_id                 = PHY_ID_VSC8531,

       .name                   = "Microsemi VSC8531",

       .phy_id_mask    = 0xfffffff0,

       .features               = PHY_GBIT_FEATURES,

       .flags                  = PHY_HAS_INTERRUPT,

       .soft_reset             = &genphy_soft_reset,

       .config_init    = &vsc85xx_config_init,

       .config_aneg    = &genphy_config_aneg,

       .aneg_done              = &genphy_aneg_done,

       .read_status    = &genphy_read_status,

       .ack_interrupt  = &vsc85xx_ack_interrupt,

       .config_intr    = &vsc85xx_config_intr,

       .suspend                = &genphy_suspend,

       .resume                 = &genphy_resume,

},

{

       .phy_id                 = PHY_ID_VSC8541,

       .name                   = "Microsemi VSC8541 SyncE",

       .phy_id_mask    = 0xfffffff0,

       .features               = PHY_GBIT_FEATURES,

       .flags                  = PHY_HAS_INTERRUPT,

       .soft_reset             = &genphy_soft_reset,

       .config_init    = &vsc85xx_config_init,

       .config_aneg    = &genphy_config_aneg,

       .aneg_done              = &genphy_aneg_done,

       .read_status    = &genphy_read_status,

       .ack_interrupt  = &vsc85xx_ack_interrupt,

       .config_intr    = &vsc85xx_config_intr,

       .suspend                = &genphy_suspend,

       .resume                 = &genphy_resume,

}



};



module_phy_driver(vsc85xx_driver);



static struct mdio_device_id __maybe_unused vsc85xx_tbl[] = {

       { PHY_ID_VSC8531, 0xfffffff0, },

       { PHY_ID_VSC8541, 0xfffffff0, },

       { }

};



MODULE_DEVICE_TABLE(mdio, vsc85xx_tbl);



MODULE_DESCRIPTION("Microsemi VSC85xx PHY driver");

MODULE_AUTHOR("Nagaraju Lakkaraju");

MODULE_LICENSE("Dual MIT/GPL");

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