From 792aec47d59d951865cc617a97b6e6be53d4b977 Mon Sep 17 00:00:00 2001 From: "Woojung.Huh@microchip.com" Date: Wed, 9 Sep 2015 20:49:53 +0000 Subject: [PATCH] add microchip LAN88xx phy driver Add Microchip LAN88XX phy driver for phylib. Signed-off-by: Woojung Huh Signed-off-by: David S. Miller --- drivers/net/phy/Kconfig | 5 ++ drivers/net/phy/Makefile | 1 + drivers/net/phy/microchip.c | 148 +++++++++++++++++++++++++++++++++++ include/linux/microchipphy.h | 73 +++++++++++++++++ 4 files changed, 227 insertions(+) create mode 100644 drivers/net/phy/microchip.c create mode 100644 include/linux/microchipphy.h diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig index c07030dbe748..c5ad98ace5d0 100644 --- a/drivers/net/phy/Kconfig +++ b/drivers/net/phy/Kconfig @@ -127,6 +127,11 @@ config DP83867_PHY ---help--- Currently supports the DP83867 PHY. +config MICROCHIP_PHY + tristate "Drivers for Microchip PHYs" + help + Supports the LAN88XX PHYs. + config FIXED_PHY tristate "Driver for MDIO Bus/PHY emulation with fixed speed/link PHYs" depends on PHYLIB diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index 9bb103358c74..87f079c4b2c7 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -37,3 +37,4 @@ obj-$(CONFIG_MDIO_BUS_MUX_MMIOREG) += mdio-mux-mmioreg.o obj-$(CONFIG_MDIO_SUN4I) += mdio-sun4i.o obj-$(CONFIG_MDIO_MOXART) += mdio-moxart.o obj-$(CONFIG_MDIO_BCM_UNIMAC) += mdio-bcm-unimac.o +obj-$(CONFIG_MICROCHIP_PHY) += microchip.o diff --git a/drivers/net/phy/microchip.c b/drivers/net/phy/microchip.c new file mode 100644 index 000000000000..c0a20ebd083b --- /dev/null +++ b/drivers/net/phy/microchip.c @@ -0,0 +1,148 @@ +/* + * Copyright (C) 2015 Microchip Technology + * + * 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, or (at your option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see . + */ +#include +#include +#include +#include +#include +#include + +#define DRIVER_AUTHOR "WOOJUNG HUH " +#define DRIVER_DESC "Microchip LAN88XX PHY driver" + +struct lan88xx_priv { + int chip_id; + int chip_rev; + __u32 wolopts; +}; + +static int lan88xx_phy_config_intr(struct phy_device *phydev) +{ + int rc; + + if (phydev->interrupts == PHY_INTERRUPT_ENABLED) { + /* unmask all source and clear them before enable */ + rc = phy_write(phydev, LAN88XX_INT_MASK, 0x7FFF); + rc = phy_read(phydev, LAN88XX_INT_STS); + rc = phy_write(phydev, LAN88XX_INT_MASK, + LAN88XX_INT_MASK_MDINTPIN_EN_ | + LAN88XX_INT_MASK_LINK_CHANGE_); + } else { + rc = phy_write(phydev, LAN88XX_INT_MASK, 0); + } + + return rc < 0 ? rc : 0; +} + +static int lan88xx_phy_ack_interrupt(struct phy_device *phydev) +{ + int rc = phy_read(phydev, LAN88XX_INT_STS); + + return rc < 0 ? rc : 0; +} + +int lan88xx_suspend(struct phy_device *phydev) +{ + struct lan88xx_priv *priv = phydev->priv; + + /* do not power down PHY when WOL is enabled */ + if (!priv->wolopts) + genphy_suspend(phydev); + + return 0; +} + +static int lan88xx_probe(struct phy_device *phydev) +{ + struct device *dev = &phydev->dev; + struct lan88xx_priv *priv; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->wolopts = 0; + + /* these values can be used to identify internal PHY */ + priv->chip_id = phy_read_mmd_indirect(phydev, LAN88XX_MMD3_CHIP_ID, + 3, phydev->addr); + priv->chip_rev = phy_read_mmd_indirect(phydev, LAN88XX_MMD3_CHIP_REV, + 3, phydev->addr); + + phydev->priv = priv; + + return 0; +} + +static void lan88xx_remove(struct phy_device *phydev) +{ + struct device *dev = &phydev->dev; + struct lan88xx_priv *priv = phydev->priv; + + if (priv) + devm_kfree(dev, priv); +} + +static int lan88xx_set_wol(struct phy_device *phydev, + struct ethtool_wolinfo *wol) +{ + struct lan88xx_priv *priv = phydev->priv; + + priv->wolopts = wol->wolopts; + + return 0; +} + +static struct phy_driver microchip_phy_driver[] = { +{ + .phy_id = 0x0007c130, + .phy_id_mask = 0xfffffff0, + .name = "Microchip LAN88xx", + + .features = (PHY_GBIT_FEATURES | + SUPPORTED_Pause | SUPPORTED_Asym_Pause), + .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG, + + .probe = lan88xx_probe, + .remove = lan88xx_remove, + + .config_init = genphy_config_init, + .config_aneg = genphy_config_aneg, + .read_status = genphy_read_status, + + .ack_interrupt = lan88xx_phy_ack_interrupt, + .config_intr = lan88xx_phy_config_intr, + + .suspend = lan88xx_suspend, + .resume = genphy_resume, + .set_wol = lan88xx_set_wol, + + .driver = { .owner = THIS_MODULE, } +} }; + +module_phy_driver(microchip_phy_driver); + +static struct mdio_device_id __maybe_unused microchip_tbl[] = { + { 0x0007c130, 0xfffffff0 }, + { } +}; + +MODULE_DEVICE_TABLE(mdio, microchip_tbl); + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); diff --git a/include/linux/microchipphy.h b/include/linux/microchipphy.h new file mode 100644 index 000000000000..eb492d47f717 --- /dev/null +++ b/include/linux/microchipphy.h @@ -0,0 +1,73 @@ +/* + * Copyright (C) 2015 Microchip Technology + * + * 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, or (at your option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see . + */ + +#ifndef _MICROCHIPPHY_H +#define _MICROCHIPPHY_H + +#define LAN88XX_INT_MASK (0x19) +#define LAN88XX_INT_MASK_MDINTPIN_EN_ (0x8000) +#define LAN88XX_INT_MASK_SPEED_CHANGE_ (0x4000) +#define LAN88XX_INT_MASK_LINK_CHANGE_ (0x2000) +#define LAN88XX_INT_MASK_FDX_CHANGE_ (0x1000) +#define LAN88XX_INT_MASK_AUTONEG_ERR_ (0x0800) +#define LAN88XX_INT_MASK_AUTONEG_DONE_ (0x0400) +#define LAN88XX_INT_MASK_POE_DETECT_ (0x0200) +#define LAN88XX_INT_MASK_SYMBOL_ERR_ (0x0100) +#define LAN88XX_INT_MASK_FAST_LINK_FAIL_ (0x0080) +#define LAN88XX_INT_MASK_WOL_EVENT_ (0x0040) +#define LAN88XX_INT_MASK_EXTENDED_INT_ (0x0020) +#define LAN88XX_INT_MASK_RESERVED_ (0x0010) +#define LAN88XX_INT_MASK_FALSE_CARRIER_ (0x0008) +#define LAN88XX_INT_MASK_LINK_SPEED_DS_ (0x0004) +#define LAN88XX_INT_MASK_MASTER_SLAVE_DONE_ (0x0002) +#define LAN88XX_INT_MASK_RX__ER_ (0x0001) + +#define LAN88XX_INT_STS (0x1A) +#define LAN88XX_INT_STS_INT_ACTIVE_ (0x8000) +#define LAN88XX_INT_STS_SPEED_CHANGE_ (0x4000) +#define LAN88XX_INT_STS_LINK_CHANGE_ (0x2000) +#define LAN88XX_INT_STS_FDX_CHANGE_ (0x1000) +#define LAN88XX_INT_STS_AUTONEG_ERR_ (0x0800) +#define LAN88XX_INT_STS_AUTONEG_DONE_ (0x0400) +#define LAN88XX_INT_STS_POE_DETECT_ (0x0200) +#define LAN88XX_INT_STS_SYMBOL_ERR_ (0x0100) +#define LAN88XX_INT_STS_FAST_LINK_FAIL_ (0x0080) +#define LAN88XX_INT_STS_WOL_EVENT_ (0x0040) +#define LAN88XX_INT_STS_EXTENDED_INT_ (0x0020) +#define LAN88XX_INT_STS_RESERVED_ (0x0010) +#define LAN88XX_INT_STS_FALSE_CARRIER_ (0x0008) +#define LAN88XX_INT_STS_LINK_SPEED_DS_ (0x0004) +#define LAN88XX_INT_STS_MASTER_SLAVE_DONE_ (0x0002) +#define LAN88XX_INT_STS_RX_ER_ (0x0001) + +#define LAN88XX_EXT_PAGE_ACCESS (0x1F) +#define LAN88XX_EXT_PAGE_SPACE_0 (0x0000) +#define LAN88XX_EXT_PAGE_SPACE_1 (0x0001) +#define LAN88XX_EXT_PAGE_SPACE_2 (0x0002) + +/* Extended Register Page 1 space */ +#define LAN88XX_EXT_MODE_CTRL (0x13) +#define LAN88XX_EXT_MODE_CTRL_MDIX_MASK_ (0x000C) +#define LAN88XX_EXT_MODE_CTRL_AUTO_MDIX_ (0x0000) +#define LAN88XX_EXT_MODE_CTRL_MDI_ (0x0008) +#define LAN88XX_EXT_MODE_CTRL_MDI_X_ (0x000C) + +/* MMD 3 Registers */ +#define LAN88XX_MMD3_CHIP_ID (32877) +#define LAN88XX_MMD3_CHIP_REV (32878) + +#endif /* _MICROCHIPPHY_H */ -- 2.20.1