Initial import

1 files changed, 268 insertions, 0 deletions

diff --git a/drivers/net/phy/smsc.c b/drivers/net/phy/smsc.c
new file mode 100644
index 000000000..c0f6479e1
--- /dev/null
+++ b/drivers/net/phy/smsc.c
@@ -0,0 +1,268 @@
+/*
+ * drivers/net/phy/smsc.c
+ *
+ * Driver for SMSC PHYs
+ *
+ * Author: Herbert Valerio Riedel
+ *
+ * Copyright (c) 2006 Herbert Valerio Riedel <hvr@gnu.org>
+ *
+ * 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 <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/phy.h>
+#include <linux/netdevice.h>
+#include <linux/smscphy.h>
+
+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 rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
+
+	if (rc < 0)
+		return rc;
+
+	/* 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 LAN8710/LAN8720 requires a minimum of 2 link pulses within 64ms of each
+ * other in order to set the ENERGYON bit and exit EDPD mode.  If a link partner
+ * does send the pulses within this interval, the PHY will remained powered
+ * down.
+ *
+ * This workaround will manually toggle the PHY on/off upon calls to read_status
+ * in order to generate link test pulses if the link is down.  If a link partner
+ * is present, it will respond to the pulses, which will cause the ENERGYON bit
+ * to be set and will cause the EDPD mode to be exited.
+ */
+static int lan87xx_read_status(struct phy_device *phydev)
+{
+	int err = genphy_read_status(phydev);
+
+	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;
+
+		/* Sleep 64 ms to allow ~5 link test pulses to be sent */
+		msleep(64);
+
+		/* 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,
+
+	.driver		= { .owner = THIS_MODULE, }
+}, {
+	.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,
+
+	.driver		= { .owner = THIS_MODULE, }
+}, {
+	.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	= 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,
+
+	.driver		= { .owner = THIS_MODULE, }
+}, {
+	.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,
+
+	.driver		= { .owner = THIS_MODULE, }
+}, {
+	.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,
+
+	.driver		= { .owner = THIS_MODULE, }
+} };
+
+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);