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Raju Lakkarajudavem330
Raju Lakkaraju
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davem330
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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 <[email protected]> Date: Wed, 3 Aug 2016 18:28:24 +0530 Subject: [PATCH v2] net: phy: Add drivers for Microsemi PHYs Signed-off-by: Nagaraju Lakkaraju <[email protected]> Signed-off-by: David S. Miller <[email protected]>
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‎drivers/net/phy/Kconfig

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@@ -307,6 +307,11 @@ config MDIO_XGENE
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This module provides a driver for the MDIO busses found in the
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APM X-Gene SoC's.
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config MICROSEMI_PHY
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tristate "Drivers for the Microsemi PHYs"
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---help---
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Currently supports the VSC8531 and VSC8541 PHYs
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endif # PHYLIB
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config MICREL_KS8995MA

‎drivers/net/phy/Makefile

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@@ -11,6 +11,7 @@ obj-$(CONFIG_CICADA_PHY) += cicada.o
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obj-$(CONFIG_LXT_PHY) += lxt.o
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obj-$(CONFIG_QSEMI_PHY) += qsemi.o
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obj-$(CONFIG_SMSC_PHY) += smsc.o
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obj-$(CONFIG_MICROSEMI_PHY) += mscc.o
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obj-$(CONFIG_TERANETICS_PHY) += teranetics.o
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obj-$(CONFIG_VITESSE_PHY) += vitesse.o
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obj-$(CONFIG_BCM_NET_PHYLIB) += bcm-phy-lib.o

‎drivers/net/phy/mscc.c

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/*
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* Driver for Microsemi VSC85xx PHYs
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*
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* Author: Nagaraju Lakkaraju
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* License: Dual MIT/GPL
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* Copyright (c) 2016 Microsemi Corporation
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mdio.h>
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#include <linux/mii.h>
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#include <linux/phy.h>
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enum rgmii_rx_clock_delay {
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RGMII_RX_CLK_DELAY_0_2_NS = 0,
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RGMII_RX_CLK_DELAY_0_8_NS = 1,
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RGMII_RX_CLK_DELAY_1_1_NS = 2,
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RGMII_RX_CLK_DELAY_1_7_NS = 3,
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RGMII_RX_CLK_DELAY_2_0_NS = 4,
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RGMII_RX_CLK_DELAY_2_3_NS = 5,
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RGMII_RX_CLK_DELAY_2_6_NS = 6,
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RGMII_RX_CLK_DELAY_3_4_NS = 7
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};
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#define MII_VSC85XX_INT_MASK 25
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#define MII_VSC85XX_INT_MASK_MASK 0xa000
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#define MII_VSC85XX_INT_STATUS 26
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#define MSCC_EXT_PAGE_ACCESS 31
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#define MSCC_PHY_PAGE_STANDARD 0x0000 /* Standard registers */
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#define MSCC_PHY_PAGE_EXTENDED_2 0x0002 /* Extended reg - page 2 */
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/* Extended Page 2 Registers */
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#define MSCC_PHY_RGMII_CNTL 20
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#define RGMII_RX_CLK_DELAY_MASK 0x0070
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#define RGMII_RX_CLK_DELAY_POS 4
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/* Microsemi PHY ID's */
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#define PHY_ID_VSC8531 0x00070570
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#define PHY_ID_VSC8541 0x00070770
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static int vsc85xx_phy_page_set(struct phy_device *phydev, u8 page)
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{
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int rc;
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rc = phy_write(phydev, MSCC_EXT_PAGE_ACCESS, page);
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return rc;
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}
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static int vsc85xx_default_config(struct phy_device *phydev)
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{
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int rc;
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u16 reg_val;
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mutex_lock(&phydev->lock);
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rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_EXTENDED_2);
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if (rc != 0)
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goto out_unlock;
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reg_val = phy_read(phydev, MSCC_PHY_RGMII_CNTL);
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reg_val &= ~(RGMII_RX_CLK_DELAY_MASK);
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reg_val |= (RGMII_RX_CLK_DELAY_1_1_NS << RGMII_RX_CLK_DELAY_POS);
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phy_write(phydev, MSCC_PHY_RGMII_CNTL, reg_val);
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rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_STANDARD);
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out_unlock:
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mutex_unlock(&phydev->lock);
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return rc;
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}
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static int vsc85xx_config_init(struct phy_device *phydev)
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{
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int rc;
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rc = vsc85xx_default_config(phydev);
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if (rc)
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return rc;
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rc = genphy_config_init(phydev);
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return rc;
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}
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static int vsc85xx_ack_interrupt(struct phy_device *phydev)
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{
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int rc;
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if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
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rc = phy_read(phydev, MII_VSC85XX_INT_STATUS);
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return (rc < 0) ? rc : 0;
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}
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static int vsc85xx_config_intr(struct phy_device *phydev)
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{
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int rc;
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if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
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rc = phy_write(phydev, MII_VSC85XX_INT_MASK,
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MII_VSC85XX_INT_MASK_MASK);
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} else {
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rc = phy_write(phydev, MII_VSC85XX_INT_MASK, 0);
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if (rc < 0)
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return rc;
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rc = phy_read(phydev, MII_VSC85XX_INT_STATUS);
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}
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return rc;
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}
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/* Microsemi VSC85xx PHYs */
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static struct phy_driver vsc85xx_driver[] = {
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{
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.phy_id = PHY_ID_VSC8531,
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.name = "Microsemi VSC8531",
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.phy_id_mask = 0xfffffff0,
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.features = PHY_GBIT_FEATURES,
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.flags = PHY_HAS_INTERRUPT,
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.soft_reset = &genphy_soft_reset,
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.config_init = &vsc85xx_config_init,
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.config_aneg = &genphy_config_aneg,
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.aneg_done = &genphy_aneg_done,
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.read_status = &genphy_read_status,
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.ack_interrupt = &vsc85xx_ack_interrupt,
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.config_intr = &vsc85xx_config_intr,
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.suspend = &genphy_suspend,
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.resume = &genphy_resume,
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},
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{
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.phy_id = PHY_ID_VSC8541,
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.name = "Microsemi VSC8541 SyncE",
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.phy_id_mask = 0xfffffff0,
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.features = PHY_GBIT_FEATURES,
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.flags = PHY_HAS_INTERRUPT,
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.soft_reset = &genphy_soft_reset,
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.config_init = &vsc85xx_config_init,
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.config_aneg = &genphy_config_aneg,
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.aneg_done = &genphy_aneg_done,
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.read_status = &genphy_read_status,
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.ack_interrupt = &vsc85xx_ack_interrupt,
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.config_intr = &vsc85xx_config_intr,
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.suspend = &genphy_suspend,
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.resume = &genphy_resume,
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}
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};
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module_phy_driver(vsc85xx_driver);
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static struct mdio_device_id __maybe_unused vsc85xx_tbl[] = {
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{ PHY_ID_VSC8531, 0xfffffff0, },
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{ PHY_ID_VSC8541, 0xfffffff0, },
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{ }
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};
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MODULE_DEVICE_TABLE(mdio, vsc85xx_tbl);
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MODULE_DESCRIPTION("Microsemi VSC85xx PHY driver");
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MODULE_AUTHOR("Nagaraju Lakkaraju");
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MODULE_LICENSE("Dual MIT/GPL");

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