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-rw-r--r--drivers/net/phy/Kconfig13
-rw-r--r--drivers/net/phy/Makefile1
-rw-r--r--drivers/net/phy/phy.c1
-rw-r--r--drivers/net/phy/phy_device.c5
-rw-r--r--drivers/net/phy/phy_led_triggers.c136
-rw-r--r--include/linux/phy.h7
-rw-r--r--include/linux/phy_led_triggers.h51
7 files changed, 214 insertions, 0 deletions
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 2651c8d8de2f..45f68eaf9b79 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -15,6 +15,19 @@ if PHYLIB
config SWPHY
bool
+config LED_TRIGGER_PHY
+ bool "Support LED triggers for tracking link state"
+ depends on LEDS_TRIGGERS
+ ---help---
+ Adds support for a set of LED trigger events per-PHY. Link
+ state change will trigger the events, for consumption by an
+ LED class driver. There are triggers for each link speed currently
+ supported by the phy, and are of the form:
+ <mii bus id>:<phy>:<speed>
+
+ Where speed is in the form:
+ <Speed in megabits>Mbps or <Speed in gigabits>Gbps
+
comment "MDIO bus device drivers"
config MDIO_BCM_IPROC
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index e58667d111e7..86d12cd3fbf0 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -2,6 +2,7 @@
libphy-y := phy.o phy_device.o mdio_bus.o mdio_device.o
libphy-$(CONFIG_SWPHY) += swphy.o
+libphy-$(CONFIG_LED_TRIGGER_PHY) += phy_led_triggers.o
obj-$(CONFIG_PHYLIB) += libphy.o
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index ee3c793124c7..2f94c60d4939 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -946,6 +946,7 @@ EXPORT_SYMBOL(phy_start);
static void phy_adjust_link(struct phy_device *phydev)
{
phydev->adjust_link(phydev->attached_dev);
+ phy_led_trigger_change_speed(phydev);
}
/**
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index ac440a815353..49a1c988d29c 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -30,6 +30,7 @@
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
+#include <linux/phy_led_triggers.h>
#include <linux/mdio.h>
#include <linux/io.h>
#include <linux/uaccess.h>
@@ -916,6 +917,8 @@ int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
else
phy_resume(phydev);
+ phy_led_triggers_register(phydev);
+
return err;
error:
@@ -989,6 +992,8 @@ void phy_detach(struct phy_device *phydev)
}
}
+ phy_led_triggers_unregister(phydev);
+
/*
* The phydev might go away on the put_device() below, so avoid
* a use-after-free bug by reading the underlying bus first.
diff --git a/drivers/net/phy/phy_led_triggers.c b/drivers/net/phy/phy_led_triggers.c
new file mode 100644
index 000000000000..cda600a1b766
--- /dev/null
+++ b/drivers/net/phy/phy_led_triggers.c
@@ -0,0 +1,136 @@
+/* Copyright (C) 2016 National Instruments Corp.
+ *
+ * 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.
+ */
+#include <linux/leds.h>
+#include <linux/phy.h>
+#include <linux/netdevice.h>
+
+static struct phy_led_trigger *phy_speed_to_led_trigger(struct phy_device *phy,
+ unsigned int speed)
+{
+ unsigned int i;
+
+ for (i = 0; i < phy->phy_num_led_triggers; i++) {
+ if (phy->phy_led_triggers[i].speed == speed)
+ return &phy->phy_led_triggers[i];
+ }
+ return NULL;
+}
+
+void phy_led_trigger_change_speed(struct phy_device *phy)
+{
+ struct phy_led_trigger *plt;
+
+ if (!phy->link)
+ goto out_change_speed;
+
+ if (phy->speed == 0)
+ return;
+
+ plt = phy_speed_to_led_trigger(phy, phy->speed);
+ if (!plt) {
+ netdev_alert(phy->attached_dev,
+ "No phy led trigger registered for speed(%d)\n",
+ phy->speed);
+ goto out_change_speed;
+ }
+
+ if (plt != phy->last_triggered) {
+ led_trigger_event(&phy->last_triggered->trigger, LED_OFF);
+ led_trigger_event(&plt->trigger, LED_FULL);
+ phy->last_triggered = plt;
+ }
+ return;
+
+out_change_speed:
+ if (phy->last_triggered) {
+ led_trigger_event(&phy->last_triggered->trigger,
+ LED_OFF);
+ phy->last_triggered = NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(phy_led_trigger_change_speed);
+
+static int phy_led_trigger_register(struct phy_device *phy,
+ struct phy_led_trigger *plt,
+ unsigned int speed)
+{
+ char name_suffix[PHY_LED_TRIGGER_SPEED_SUFFIX_SIZE];
+
+ plt->speed = speed;
+
+ if (speed < SPEED_1000)
+ snprintf(name_suffix, sizeof(name_suffix), "%dMbps", speed);
+ else if (speed == SPEED_2500)
+ snprintf(name_suffix, sizeof(name_suffix), "2.5Gbps");
+ else
+ snprintf(name_suffix, sizeof(name_suffix), "%dGbps",
+ DIV_ROUND_CLOSEST(speed, 1000));
+
+ snprintf(plt->name, sizeof(plt->name), PHY_ID_FMT ":%s",
+ phy->mdio.bus->id, phy->mdio.addr, name_suffix);
+ plt->trigger.name = plt->name;
+
+ return led_trigger_register(&plt->trigger);
+}
+
+static void phy_led_trigger_unregister(struct phy_led_trigger *plt)
+{
+ led_trigger_unregister(&plt->trigger);
+}
+
+int phy_led_triggers_register(struct phy_device *phy)
+{
+ int i, err;
+ unsigned int speeds[50];
+
+ phy->phy_num_led_triggers = phy_supported_speeds(phy, speeds,
+ ARRAY_SIZE(speeds));
+ if (!phy->phy_num_led_triggers)
+ return 0;
+
+ phy->phy_led_triggers = devm_kzalloc(&phy->mdio.dev,
+ sizeof(struct phy_led_trigger) *
+ phy->phy_num_led_triggers,
+ GFP_KERNEL);
+ if (!phy->phy_led_triggers)
+ return -ENOMEM;
+
+ for (i = 0; i < phy->phy_num_led_triggers; i++) {
+ err = phy_led_trigger_register(phy, &phy->phy_led_triggers[i],
+ speeds[i]);
+ if (err)
+ goto out_unreg;
+ }
+
+ phy->last_triggered = NULL;
+ phy_led_trigger_change_speed(phy);
+
+ return 0;
+out_unreg:
+ while (i--)
+ phy_led_trigger_unregister(&phy->phy_led_triggers[i]);
+ devm_kfree(&phy->mdio.dev, phy->phy_led_triggers);
+ return err;
+}
+EXPORT_SYMBOL_GPL(phy_led_triggers_register);
+
+void phy_led_triggers_unregister(struct phy_device *phy)
+{
+ int i;
+
+ for (i = 0; i < phy->phy_num_led_triggers; i++)
+ phy_led_trigger_unregister(&phy->phy_led_triggers[i]);
+
+ devm_kfree(&phy->mdio.dev, phy->phy_led_triggers);
+}
+EXPORT_SYMBOL_GPL(phy_led_triggers_unregister);
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 4b6c246c63bb..e7e1fd382564 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -25,6 +25,7 @@
#include <linux/timer.h>
#include <linux/workqueue.h>
#include <linux/mod_devicetable.h>
+#include <linux/phy_led_triggers.h>
#include <linux/atomic.h>
@@ -420,6 +421,12 @@ struct phy_device {
int link_timeout;
+#ifdef CONFIG_LED_TRIGGER_PHY
+ struct phy_led_trigger *phy_led_triggers;
+ unsigned int phy_num_led_triggers;
+ struct phy_led_trigger *last_triggered;
+#endif
+
/*
* Interrupt number for this PHY
* -1 means no interrupt
diff --git a/include/linux/phy_led_triggers.h b/include/linux/phy_led_triggers.h
new file mode 100644
index 000000000000..a2daea0a37d2
--- /dev/null
+++ b/include/linux/phy_led_triggers.h
@@ -0,0 +1,51 @@
+/* Copyright (C) 2016 National Instruments Corp.
+ *
+ * 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.
+ */
+#ifndef __PHY_LED_TRIGGERS
+#define __PHY_LED_TRIGGERS
+
+struct phy_device;
+
+#ifdef CONFIG_LED_TRIGGER_PHY
+
+#include <linux/leds.h>
+
+#define PHY_LED_TRIGGER_SPEED_SUFFIX_SIZE 10
+#define PHY_MII_BUS_ID_SIZE (20 - 3)
+
+#define PHY_LINK_LED_TRIGGER_NAME_SIZE (PHY_MII_BUS_ID_SIZE + \
+ FIELD_SIZEOF(struct mdio_device, addr)+\
+ PHY_LED_TRIGGER_SPEED_SUFFIX_SIZE)
+
+struct phy_led_trigger {
+ struct led_trigger trigger;
+ char name[PHY_LINK_LED_TRIGGER_NAME_SIZE];
+ unsigned int speed;
+};
+
+
+extern int phy_led_triggers_register(struct phy_device *phy);
+extern void phy_led_triggers_unregister(struct phy_device *phy);
+extern void phy_led_trigger_change_speed(struct phy_device *phy);
+
+#else
+
+static inline int phy_led_triggers_register(struct phy_device *phy)
+{
+ return 0;
+}
+static inline void phy_led_triggers_unregister(struct phy_device *phy) { }
+static inline void phy_led_trigger_change_speed(struct phy_device *phy) { }
+
+#endif
+
+#endif
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