diff options
author | Raju Lakkaraju <Raju.Lakkaraju@microsemi.com> | 2016-08-05 17:54:21 +0530 |
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committer | David S. Miller <davem@davemloft.net> | 2016-08-08 16:15:57 -0700 |
commit | d50736a853b8633ed8c9c64a2a1487e6081b739c (patch) | |
tree | 00e109956d8dd4f6d9acb9ce65ef8747ea90432d /drivers/net/phy | |
parent | 07bf2e11ad0586855f8be5e5775a4f314ce057fe (diff) | |
download | op-kernel-dev-d50736a853b8633ed8c9c64a2a1487e6081b739c.zip op-kernel-dev-d50736a853b8633ed8c9c64a2a1487e6081b739c.tar.gz |
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: Nagaraju Lakkaraju <Raju.Lakkaraju@microsemi.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy')
-rw-r--r-- | drivers/net/phy/Kconfig | 5 | ||||
-rw-r--r-- | drivers/net/phy/Makefile | 1 | ||||
-rw-r--r-- | drivers/net/phy/mscc.c | 161 |
3 files changed, 167 insertions, 0 deletions
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig index 47a6434..1b534ea 100644 --- a/drivers/net/phy/Kconfig +++ b/drivers/net/phy/Kconfig @@ -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 diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index 534dfa7..a713bd4 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -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 diff --git a/drivers/net/phy/mscc.c b/drivers/net/phy/mscc.c new file mode 100644 index 0000000..2e1de53 --- /dev/null +++ b/drivers/net/phy/mscc.c @@ -0,0 +1,161 @@ +/* + * 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"); |