273 lines
6.8 KiB
C
273 lines
6.8 KiB
C
/*
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* drivers/net/phy/smsc.c
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*
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* Driver for SMSC PHYs
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*
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* Author: Herbert Valerio Riedel
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*
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* Copyright (c) 2006 Herbert Valerio Riedel <hvr@gnu.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* Support added for SMSC LAN8187 and LAN8700 by steve.glendinning@shawell.net
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*
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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/mii.h>
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#include <linux/ethtool.h>
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#include <linux/phy.h>
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#include <linux/netdevice.h>
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#include <linux/smscphy.h>
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static int smsc_phy_config_intr(struct phy_device *phydev)
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{
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int rc = phy_write (phydev, MII_LAN83C185_IM,
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((PHY_INTERRUPT_ENABLED == phydev->interrupts)
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? MII_LAN83C185_ISF_INT_PHYLIB_EVENTS
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: 0));
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return rc < 0 ? rc : 0;
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}
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static int smsc_phy_ack_interrupt(struct phy_device *phydev)
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{
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int rc = phy_read (phydev, MII_LAN83C185_ISF);
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return rc < 0 ? rc : 0;
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}
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static int smsc_phy_config_init(struct phy_device *phydev)
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{
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int rc = phy_read(phydev, MII_LAN83C185_SPECIAL_MODES);
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if (rc < 0)
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return rc;
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/* If the SMSC PHY is in power down mode, then set it
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* in all capable mode before using it.
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*/
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if ((rc & MII_LAN83C185_MODE_MASK) == MII_LAN83C185_MODE_POWERDOWN) {
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int timeout = 50000;
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/* set "all capable" mode and reset the phy */
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rc |= MII_LAN83C185_MODE_ALL;
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phy_write(phydev, MII_LAN83C185_SPECIAL_MODES, rc);
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phy_write(phydev, MII_BMCR, BMCR_RESET);
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/* wait end of reset (max 500 ms) */
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do {
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udelay(10);
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if (timeout-- == 0)
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return -1;
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rc = phy_read(phydev, MII_BMCR);
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} while (rc & BMCR_RESET);
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}
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rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
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if (rc < 0)
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return rc;
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/* Enable energy detect mode for this SMSC Transceivers */
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rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
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rc | MII_LAN83C185_EDPWRDOWN);
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if (rc < 0)
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return rc;
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return smsc_phy_ack_interrupt (phydev);
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}
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static int lan911x_config_init(struct phy_device *phydev)
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{
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return smsc_phy_ack_interrupt(phydev);
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}
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/*
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* The LAN8710/LAN8720 requires a minimum of 2 link pulses within 64ms of each
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* other in order to set the ENERGYON bit and exit EDPD mode. If a link partner
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* does send the pulses within this interval, the PHY will remained powered
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* down.
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*
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* This workaround will manually toggle the PHY on/off upon calls to read_status
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* in order to generate link test pulses if the link is down. If a link partner
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* is present, it will respond to the pulses, which will cause the ENERGYON bit
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* to be set and will cause the EDPD mode to be exited.
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*/
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static int lan87xx_read_status(struct phy_device *phydev)
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{
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int err = genphy_read_status(phydev);
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if (!phydev->link) {
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/* Disable EDPD to wake up PHY */
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int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
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if (rc < 0)
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return rc;
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rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
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rc & ~MII_LAN83C185_EDPWRDOWN);
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if (rc < 0)
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return rc;
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/* Sleep 64 ms to allow ~5 link test pulses to be sent */
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msleep(64);
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/* Re-enable EDPD */
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rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
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if (rc < 0)
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return rc;
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rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
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rc | MII_LAN83C185_EDPWRDOWN);
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if (rc < 0)
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return rc;
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}
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return err;
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}
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static struct phy_driver smsc_phy_driver[] = {
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{
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.phy_id = 0x0007c0a0, /* OUI=0x00800f, Model#=0x0a */
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.phy_id_mask = 0xfffffff0,
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.name = "SMSC LAN83C185",
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.features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
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| SUPPORTED_Asym_Pause),
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.flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
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/* basic functions */
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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.config_init = smsc_phy_config_init,
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/* IRQ related */
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.ack_interrupt = smsc_phy_ack_interrupt,
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.config_intr = smsc_phy_config_intr,
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.suspend = genphy_suspend,
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.resume = genphy_resume,
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.driver = { .owner = THIS_MODULE, }
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}, {
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.phy_id = 0x0007c0b0, /* OUI=0x00800f, Model#=0x0b */
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.phy_id_mask = 0xfffffff0,
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.name = "SMSC LAN8187",
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.features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
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| SUPPORTED_Asym_Pause),
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.flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
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/* basic functions */
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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.config_init = smsc_phy_config_init,
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/* IRQ related */
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.ack_interrupt = smsc_phy_ack_interrupt,
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.config_intr = smsc_phy_config_intr,
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.suspend = genphy_suspend,
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.resume = genphy_resume,
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.driver = { .owner = THIS_MODULE, }
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}, {
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.phy_id = 0x0007c0c0, /* OUI=0x00800f, Model#=0x0c */
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.phy_id_mask = 0xfffffff0,
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.name = "SMSC LAN8700",
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.features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
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| SUPPORTED_Asym_Pause),
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.flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
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/* basic functions */
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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.config_init = smsc_phy_config_init,
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/* IRQ related */
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.ack_interrupt = smsc_phy_ack_interrupt,
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.config_intr = smsc_phy_config_intr,
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.suspend = genphy_suspend,
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.resume = genphy_resume,
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.driver = { .owner = THIS_MODULE, }
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}, {
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.phy_id = 0x0007c0d0, /* OUI=0x00800f, Model#=0x0d */
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.phy_id_mask = 0xfffffff0,
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.name = "SMSC LAN911x Internal PHY",
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.features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
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| SUPPORTED_Asym_Pause),
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.flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
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/* basic functions */
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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.config_init = lan911x_config_init,
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/* IRQ related */
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.ack_interrupt = smsc_phy_ack_interrupt,
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.config_intr = smsc_phy_config_intr,
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.suspend = genphy_suspend,
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.resume = genphy_resume,
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.driver = { .owner = THIS_MODULE, }
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}, {
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.phy_id = 0x0007c0f0, /* OUI=0x00800f, Model#=0x0f */
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.phy_id_mask = 0xfffffff0,
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.name = "SMSC LAN8710/LAN8720",
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.features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
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| SUPPORTED_Asym_Pause),
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.flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
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/* basic functions */
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.config_aneg = genphy_config_aneg,
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.read_status = lan87xx_read_status,
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.config_init = smsc_phy_config_init,
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/* IRQ related */
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.ack_interrupt = smsc_phy_ack_interrupt,
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.config_intr = smsc_phy_config_intr,
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.suspend = genphy_suspend,
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.resume = genphy_resume,
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.driver = { .owner = THIS_MODULE, }
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} };
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static int __init smsc_init(void)
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{
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return phy_drivers_register(smsc_phy_driver,
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ARRAY_SIZE(smsc_phy_driver));
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}
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static void __exit smsc_exit(void)
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{
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return phy_drivers_unregister(smsc_phy_driver,
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ARRAY_SIZE(smsc_phy_driver));
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}
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MODULE_DESCRIPTION("SMSC PHY driver");
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MODULE_AUTHOR("Herbert Valerio Riedel");
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MODULE_LICENSE("GPL");
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module_init(smsc_init);
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module_exit(smsc_exit);
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static struct mdio_device_id __maybe_unused smsc_tbl[] = {
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{ 0x0007c0a0, 0xfffffff0 },
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{ 0x0007c0b0, 0xfffffff0 },
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{ 0x0007c0c0, 0xfffffff0 },
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{ 0x0007c0d0, 0xfffffff0 },
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{ 0x0007c0f0, 0xfffffff0 },
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{ }
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};
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MODULE_DEVICE_TABLE(mdio, smsc_tbl);
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