v4.19.13 snapshot.
diff --git a/drivers/net/phy/smsc.c b/drivers/net/phy/smsc.c
new file mode 100644
index 0000000..c328208
--- /dev/null
+++ b/drivers/net/phy/smsc.c
@@ -0,0 +1,376 @@
+/*
+ * 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/of.h>
+#include <linux/phy.h>
+#include <linux/netdevice.h>
+#include <linux/smscphy.h>
+
+struct smsc_hw_stat {
+ const char *string;
+ u8 reg;
+ u8 bits;
+};
+
+static struct smsc_hw_stat smsc_hw_stats[] = {
+ { "phy_symbol_errors", 26, 16},
+};
+
+struct smsc_phy_priv {
+ bool energy_enable;
+};
+
+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)
+{
+ struct smsc_phy_priv *priv = phydev->priv;
+
+ int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
+
+ if (rc < 0)
+ return rc;
+
+ if (priv->energy_enable) {
+ /* 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) {
+ /* set "all capable" mode */
+ rc |= MII_LAN83C185_MODE_ALL;
+ phy_write(phydev, MII_LAN83C185_SPECIAL_MODES, rc);
+ }
+
+ /* reset the phy */
+ return genphy_soft_reset(phydev);
+}
+
+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)
+{
+ struct smsc_phy_priv *priv = phydev->priv;
+
+ int err = genphy_read_status(phydev);
+
+ if (!phydev->link && priv->energy_enable) {
+ int i;
+
+ /* 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 int smsc_get_sset_count(struct phy_device *phydev)
+{
+ return ARRAY_SIZE(smsc_hw_stats);
+}
+
+static void smsc_get_strings(struct phy_device *phydev, u8 *data)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(smsc_hw_stats); i++) {
+ strncpy(data + i * ETH_GSTRING_LEN,
+ smsc_hw_stats[i].string, ETH_GSTRING_LEN);
+ }
+}
+
+static u64 smsc_get_stat(struct phy_device *phydev, int i)
+{
+ struct smsc_hw_stat stat = smsc_hw_stats[i];
+ int val;
+ u64 ret;
+
+ val = phy_read(phydev, stat.reg);
+ if (val < 0)
+ ret = U64_MAX;
+ else
+ ret = val;
+
+ return ret;
+}
+
+static void smsc_get_stats(struct phy_device *phydev,
+ struct ethtool_stats *stats, u64 *data)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(smsc_hw_stats); i++)
+ data[i] = smsc_get_stat(phydev, i);
+}
+
+static int smsc_phy_probe(struct phy_device *phydev)
+{
+ struct device *dev = &phydev->mdio.dev;
+ struct device_node *of_node = dev->of_node;
+ struct smsc_phy_priv *priv;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->energy_enable = true;
+
+ if (of_property_read_bool(of_node, "smsc,disable-energy-detect"))
+ priv->energy_enable = false;
+
+ phydev->priv = priv;
+
+ return 0;
+}
+
+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,
+ .flags = PHY_HAS_INTERRUPT,
+
+ .probe = smsc_phy_probe,
+
+ /* basic functions */
+ .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,
+ .flags = PHY_HAS_INTERRUPT,
+
+ .probe = smsc_phy_probe,
+
+ /* basic functions */
+ .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,
+
+ /* Statistics */
+ .get_sset_count = smsc_get_sset_count,
+ .get_strings = smsc_get_strings,
+ .get_stats = smsc_get_stats,
+
+ .suspend = genphy_suspend,
+ .resume = genphy_resume,
+}, {
+ .phy_id = 0x0007c0c0, /* OUI=0x00800f, Model#=0x0c */
+ .phy_id_mask = 0xfffffff0,
+ .name = "SMSC LAN8700",
+
+ .features = PHY_BASIC_FEATURES,
+ .flags = PHY_HAS_INTERRUPT,
+
+ .probe = smsc_phy_probe,
+
+ /* basic functions */
+ .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,
+
+ /* Statistics */
+ .get_sset_count = smsc_get_sset_count,
+ .get_strings = smsc_get_strings,
+ .get_stats = smsc_get_stats,
+
+ .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,
+ .flags = PHY_HAS_INTERRUPT,
+
+ .probe = smsc_phy_probe,
+
+ /* basic functions */
+ .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,
+ .flags = PHY_HAS_INTERRUPT | PHY_RST_AFTER_CLK_EN,
+
+ .probe = smsc_phy_probe,
+
+ /* basic functions */
+ .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,
+
+ /* Statistics */
+ .get_sset_count = smsc_get_sset_count,
+ .get_strings = smsc_get_strings,
+ .get_stats = smsc_get_stats,
+
+ .suspend = genphy_suspend,
+ .resume = genphy_resume,
+}, {
+ .phy_id = 0x0007c110,
+ .phy_id_mask = 0xfffffff0,
+ .name = "SMSC LAN8740",
+
+ .features = PHY_BASIC_FEATURES,
+ .flags = PHY_HAS_INTERRUPT,
+
+ .probe = smsc_phy_probe,
+
+ /* basic functions */
+ .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,
+
+ /* Statistics */
+ .get_sset_count = smsc_get_sset_count,
+ .get_strings = smsc_get_strings,
+ .get_stats = smsc_get_stats,
+
+ .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 },
+ { 0x0007c110, 0xfffffff0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(mdio, smsc_tbl);