/* * drivers/net/phy/smsc.c * * Driver for SMSC PHYs * * Author: Herbert Valerio Riedel * * Copyright (c) 2006 Herbert Valerio Riedel * * 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. * * Support added for SMSC LAN8187 and LAN8700 by steve.glendinning@shawell.net * */ #include #include #include #include #include #include #include static int smsc_phy_config_intr(struct phy_device *phydev) { int rc = phy_write (phydev, MII_LAN83C185_IM, ((PHY_INTERRUPT_ENABLED == phydev->interrupts) ? MII_LAN83C185_ISF_INT_PHYLIB_EVENTS : 0)); return rc < 0 ? rc : 0; } static int smsc_phy_ack_interrupt(struct phy_device *phydev) { int rc = phy_read (phydev, MII_LAN83C185_ISF); return rc < 0 ? rc : 0; } static int smsc_phy_config_init(struct phy_device *phydev) { int __maybe_unused len; struct device *dev __maybe_unused = &phydev->mdio.dev; struct device_node *of_node __maybe_unused = dev->of_node; int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS); int enable_energy = 1; if (rc < 0) return rc; if (of_find_property(of_node, "smsc,disable-energy-detect", &len)) enable_energy = 0; if (enable_energy) { /* Enable energy detect mode for this SMSC Transceivers */ rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS, rc | MII_LAN83C185_EDPWRDOWN); if (rc < 0) return rc; } return smsc_phy_ack_interrupt(phydev); } static int smsc_phy_reset(struct phy_device *phydev) { int rc = phy_read(phydev, MII_LAN83C185_SPECIAL_MODES); if (rc < 0) return rc; /* If the SMSC PHY is in power down mode, then set it * in all capable mode before using it. */ if ((rc & MII_LAN83C185_MODE_MASK) == MII_LAN83C185_MODE_POWERDOWN) { int timeout = 50000; /* set "all capable" mode and reset the phy */ rc |= MII_LAN83C185_MODE_ALL; phy_write(phydev, MII_LAN83C185_SPECIAL_MODES, rc); phy_write(phydev, MII_BMCR, BMCR_RESET); /* wait end of reset (max 500 ms) */ do { udelay(10); if (timeout-- == 0) return -1; rc = phy_read(phydev, MII_BMCR); } while (rc & BMCR_RESET); } return 0; } static int lan911x_config_init(struct phy_device *phydev) { return smsc_phy_ack_interrupt(phydev); } /* * The LAN87xx suffers from rare absence of the ENERGYON-bit when Ethernet cable * plugs in while LAN87xx is in Energy Detect Power-Down mode. This leads to * unstable detection of plugging in Ethernet cable. * This workaround disables Energy Detect Power-Down mode and waiting for * response on link pulses to detect presence of plugged Ethernet cable. * The Energy Detect Power-Down mode is enabled again in the end of procedure to * save approximately 220 mW of power if cable is unplugged. */ static int lan87xx_read_status(struct phy_device *phydev) { int err = genphy_read_status(phydev); int i; if (!phydev->link) { /* Disable EDPD to wake up PHY */ int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS); if (rc < 0) return rc; rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS, rc & ~MII_LAN83C185_EDPWRDOWN); if (rc < 0) return rc; /* Wait max 640 ms to detect energy */ for (i = 0; i < 64; i++) { /* Sleep to allow link test pulses to be sent */ msleep(10); rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS); if (rc < 0) return rc; if (rc & MII_LAN83C185_ENERGYON) break; } /* Re-enable EDPD */ rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS); if (rc < 0) return rc; rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS, rc | MII_LAN83C185_EDPWRDOWN); if (rc < 0) return rc; } return err; } static struct phy_driver smsc_phy_driver[] = { { .phy_id = 0x0007c0a0, /* OUI=0x00800f, Model#=0x0a */ .phy_id_mask = 0xfffffff0, .name = "SMSC LAN83C185", .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause | SUPPORTED_Asym_Pause), .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG, /* basic functions */ .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .config_init = smsc_phy_config_init, .soft_reset = smsc_phy_reset, /* IRQ related */ .ack_interrupt = smsc_phy_ack_interrupt, .config_intr = smsc_phy_config_intr, .suspend = genphy_suspend, .resume = genphy_resume, }, { .phy_id = 0x0007c0b0, /* OUI=0x00800f, Model#=0x0b */ .phy_id_mask = 0xfffffff0, .name = "SMSC LAN8187", .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause | SUPPORTED_Asym_Pause), .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG, /* basic functions */ .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .config_init = smsc_phy_config_init, .soft_reset = smsc_phy_reset, /* IRQ related */ .ack_interrupt = smsc_phy_ack_interrupt, .config_intr = smsc_phy_config_intr, .suspend = genphy_suspend, .resume = genphy_resume, }, { .phy_id = 0x0007c0c0, /* OUI=0x00800f, Model#=0x0c */ .phy_id_mask = 0xfffffff0, .name = "SMSC LAN8700", .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause | SUPPORTED_Asym_Pause), .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG, /* basic functions */ .config_aneg = genphy_config_aneg, .read_status = lan87xx_read_status, .config_init = smsc_phy_config_init, .soft_reset = smsc_phy_reset, /* IRQ related */ .ack_interrupt = smsc_phy_ack_interrupt, .config_intr = smsc_phy_config_intr, .suspend = genphy_suspend, .resume = genphy_resume, }, { .phy_id = 0x0007c0d0, /* OUI=0x00800f, Model#=0x0d */ .phy_id_mask = 0xfffffff0, .name = "SMSC LAN911x Internal PHY", .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause | SUPPORTED_Asym_Pause), .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG, /* basic functions */ .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .config_init = lan911x_config_init, /* IRQ related */ .ack_interrupt = smsc_phy_ack_interrupt, .config_intr = smsc_phy_config_intr, .suspend = genphy_suspend, .resume = genphy_resume, }, { .phy_id = 0x0007c0f0, /* OUI=0x00800f, Model#=0x0f */ .phy_id_mask = 0xfffffff0, .name = "SMSC LAN8710/LAN8720", .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause | SUPPORTED_Asym_Pause), .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG, /* basic functions */ .config_aneg = genphy_config_aneg, .read_status = lan87xx_read_status, .config_init = smsc_phy_config_init, .soft_reset = smsc_phy_reset, /* IRQ related */ .ack_interrupt = smsc_phy_ack_interrupt, .config_intr = smsc_phy_config_intr, .suspend = genphy_suspend, .resume = genphy_resume, } }; module_phy_driver(smsc_phy_driver); MODULE_DESCRIPTION("SMSC PHY driver"); MODULE_AUTHOR("Herbert Valerio Riedel"); MODULE_LICENSE("GPL"); static struct mdio_device_id __maybe_unused smsc_tbl[] = { { 0x0007c0a0, 0xfffffff0 }, { 0x0007c0b0, 0xfffffff0 }, { 0x0007c0c0, 0xfffffff0 }, { 0x0007c0d0, 0xfffffff0 }, { 0x0007c0f0, 0xfffffff0 }, { } }; MODULE_DEVICE_TABLE(mdio, smsc_tbl);