From 2fa550e1ca132377ee4910eaaf331a257190b75e Mon Sep 17 00:00:00 2001 From: John Crispin Date: Mon, 22 Oct 2012 09:28:30 +0200 Subject: [PATCH 110/113] NET: PHY: adds driver for lantiq PHY11G Signed-off-by: John Crispin --- drivers/net/phy/Kconfig | 5 ++ drivers/net/phy/Makefile | 1 + drivers/net/phy/lantiq.c | 178 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 184 insertions(+) create mode 100644 drivers/net/phy/lantiq.c diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig index 983bbf4..a7ff1d2 100644 --- a/drivers/net/phy/Kconfig +++ b/drivers/net/phy/Kconfig @@ -102,6 +102,11 @@ config MICREL_PHY ---help--- Supports the KSZ9021, VSC8201, KS8001 PHYs. +config LANTIQ_PHY + tristate "Driver for Lantiq PHYs" + ---help--- + Supports the 11G and 22E PHYs. + config FIXED_PHY bool "Driver for MDIO Bus/PHY emulation with fixed speed/link PHYs" depends on PHYLIB=y diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index 426674d..3aa92bf 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -23,6 +23,7 @@ obj-$(CONFIG_NATIONAL_PHY) += national.o obj-$(CONFIG_DP83640_PHY) += dp83640.o obj-$(CONFIG_STE10XP) += ste10Xp.o obj-$(CONFIG_MICREL_PHY) += micrel.o +obj-$(CONFIG_LANTIQ_PHY) += lantiq.o obj-$(CONFIG_MDIO_OCTEON) += mdio-octeon.o obj-$(CONFIG_MICREL_KS8995MA) += spi_ks8995.o obj-$(CONFIG_AMD_PHY) += amd.o diff --git a/drivers/net/phy/lantiq.c b/drivers/net/phy/lantiq.c new file mode 100644 index 0000000..ba4d7b7 --- /dev/null +++ b/drivers/net/phy/lantiq.c @@ -0,0 +1,178 @@ +/* + * 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, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. + * + * Copyright (C) 2012 Daniel Schwierzeck + */ + +#include +#include + +#define MII_MMDCTRL 0x0d +#define MII_MMDDATA 0x0e + +#define MII_VR9_11G_IMASK 0x19 /* interrupt mask */ +#define MII_VR9_11G_ISTAT 0x1a /* interrupt status */ + +#define INT_VR9_11G_WOL BIT(15) /* Wake-On-LAN */ +#define INT_VR9_11G_ANE BIT(11) /* Auto-Neg error */ +#define INT_VR9_11G_ANC BIT(10) /* Auto-Neg complete */ +#define INT_VR9_11G_ADSC BIT(5) /* Link auto-downspeed detect */ +#define INT_VR9_11G_DXMC BIT(2) /* Duplex mode change */ +#define INT_VR9_11G_LSPC BIT(1) /* Link speed change */ +#define INT_VR9_11G_LSTC BIT(0) /* Link state change */ +#define INT_VR9_11G_MASK (INT_VR9_11G_LSTC | INT_VR9_11G_ADSC) + +#define ADVERTISED_MPD BIT(10) /* Multi-port device */ + +#define MMD_DEVAD 0x1f +#define MMD_ACTYPE_SHIFT 14 +#define MMD_ACTYPE_ADDRESS (0 << MMD_ACTYPE_SHIFT) +#define MMD_ACTYPE_DATA (1 << MMD_ACTYPE_SHIFT) +#define MMD_ACTYPE_DATA_PI (2 << MMD_ACTYPE_SHIFT) +#define MMD_ACTYPE_DATA_PIWR (3 << MMD_ACTYPE_SHIFT) + +static __maybe_unused int vr9_gphy_mmd_read(struct phy_device *phydev, + u16 regnum) +{ + phy_write(phydev, MII_MMDCTRL, MMD_ACTYPE_ADDRESS | MMD_DEVAD); + phy_write(phydev, MII_MMDDATA, regnum); + phy_write(phydev, MII_MMDCTRL, MMD_ACTYPE_DATA | MMD_DEVAD); + + return phy_read(phydev, MII_MMDDATA); +} + +static __maybe_unused int vr9_gphy_mmd_write(struct phy_device *phydev, + u16 regnum, u16 val) +{ + phy_write(phydev, MII_MMDCTRL, MMD_ACTYPE_ADDRESS | MMD_DEVAD); + phy_write(phydev, MII_MMDDATA, regnum); + phy_write(phydev, MII_MMDCTRL, MMD_ACTYPE_DATA | MMD_DEVAD); + phy_write(phydev, MII_MMDDATA, val); + + return 0; +} + +static int vr9_gphy_config_init(struct phy_device *phydev) +{ + int err; + + dev_dbg(&phydev->dev, "%s\n", __func__); + + /* Mask all interrupts */ + err = phy_write(phydev, MII_VR9_11G_IMASK, 0); + if (err) + return err; + + /* Clear all pending interrupts */ + phy_read(phydev, MII_VR9_11G_ISTAT); + + return 0; +} + +static int vr9_gphy_config_aneg(struct phy_device *phydev) +{ + int reg, err; + + /* Advertise as multi-port device */ + reg = phy_read(phydev, MII_CTRL1000); + reg |= ADVERTISED_MPD; + err = phy_write(phydev, MII_CTRL1000, reg); + if (err) + return err; + + return genphy_config_aneg(phydev); +} + +static int vr9_gphy_ack_interrupt(struct phy_device *phydev) +{ + int reg; + + /* + * Possible IRQ numbers: + * - IM3_IRL18 for GPHY0 + * - IM3_IRL17 for GPHY1 + * + * Due to a silicon bug IRQ lines are not really independent from + * each other. Sometimes the two lines are driven at the same time + * if only one GPHY core raises the interrupt. + */ + + reg = phy_read(phydev, MII_VR9_11G_ISTAT); + + return (reg < 0) ? reg : 0; +} + +static int vr9_gphy_did_interrupt(struct phy_device *phydev) +{ + int reg; + + reg = phy_read(phydev, MII_VR9_11G_ISTAT); + + return reg > 0; +} + +static int vr9_gphy_config_intr(struct phy_device *phydev) +{ + int err; + + if (phydev->interrupts == PHY_INTERRUPT_ENABLED) + err = phy_write(phydev, MII_VR9_11G_IMASK, INT_VR9_11G_MASK); + else + err = phy_write(phydev, MII_VR9_11G_IMASK, 0); + + return err; +} + +/* TODO: add vr9_gphy_22f_driver and drivers for external Lantiq PEF7071 PHYs */ +static struct phy_driver vr9_gphy_11g_driver = { + .phy_id = 0xd565a408, + .phy_id_mask = 0xfffffff0, + .name = "Lantiq XWAY VR9 GPHY 11G", + .features = (PHY_GBIT_FEATURES | SUPPORTED_Pause), + .flags = 0, /*PHY_HAS_INTERRUPT,*/ + .config_init = vr9_gphy_config_init, + .config_aneg = vr9_gphy_config_aneg, + .read_status = genphy_read_status, + .ack_interrupt = vr9_gphy_ack_interrupt, + .did_interrupt = vr9_gphy_did_interrupt, + .config_intr = vr9_gphy_config_intr, + .driver = { .owner = THIS_MODULE }, +}; + +static int __init ltq_phy_init(void) +{ + int err; + + err = phy_driver_register(&vr9_gphy_11g_driver); + if (err) + goto err_out; + + return 0; + +err_out: + return err; +} + +static void __exit ltq_phy_exit(void) +{ + phy_driver_unregister(&vr9_gphy_11g_driver); +} + +module_init(ltq_phy_init); +module_exit(ltq_phy_exit); + +MODULE_DESCRIPTION("Lantiq PHY drivers"); +MODULE_AUTHOR("Daniel Schwierzeck "); +MODULE_LICENSE("GPL"); -- 1.7.10.4