1 /* Copyright (C) 2016 National Instruments Corp.
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2 of the License, or
6 * (at your option) any later version.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 #include <linux/leds.h>
14 #include <linux/phy.h>
15 #include <linux/phy_led_triggers.h>
16 #include <linux/netdevice.h>
18 static struct phy_led_trigger *phy_speed_to_led_trigger(struct phy_device *phy,
23 for (i = 0; i < phy->phy_num_led_triggers; i++) {
24 if (phy->phy_led_triggers[i].speed == speed)
25 return &phy->phy_led_triggers[i];
30 static void phy_led_trigger_no_link(struct phy_device *phy)
32 if (phy->last_triggered) {
33 led_trigger_event(&phy->last_triggered->trigger, LED_OFF);
34 led_trigger_event(&phy->led_link_trigger->trigger, LED_OFF);
35 phy->last_triggered = NULL;
39 void phy_led_trigger_change_speed(struct phy_device *phy)
41 struct phy_led_trigger *plt;
44 return phy_led_trigger_no_link(phy);
49 plt = phy_speed_to_led_trigger(phy, phy->speed);
51 netdev_alert(phy->attached_dev,
52 "No phy led trigger registered for speed(%d)\n",
54 return phy_led_trigger_no_link(phy);
57 if (plt != phy->last_triggered) {
58 if (!phy->last_triggered)
59 led_trigger_event(&phy->led_link_trigger->trigger,
62 led_trigger_event(&phy->last_triggered->trigger, LED_OFF);
63 led_trigger_event(&plt->trigger, LED_FULL);
64 phy->last_triggered = plt;
67 EXPORT_SYMBOL_GPL(phy_led_trigger_change_speed);
69 static void phy_led_trigger_format_name(struct phy_device *phy, char *buf,
70 size_t size, char *suffix)
72 snprintf(buf, size, PHY_ID_FMT ":%s",
73 phy->mdio.bus->id, phy->mdio.addr, suffix);
76 static int phy_led_trigger_register(struct phy_device *phy,
77 struct phy_led_trigger *plt,
80 char name_suffix[PHY_LED_TRIGGER_SPEED_SUFFIX_SIZE];
84 if (speed < SPEED_1000)
85 snprintf(name_suffix, sizeof(name_suffix), "%dMbps", speed);
86 else if (speed == SPEED_2500)
87 snprintf(name_suffix, sizeof(name_suffix), "2.5Gbps");
89 snprintf(name_suffix, sizeof(name_suffix), "%dGbps",
90 DIV_ROUND_CLOSEST(speed, 1000));
92 phy_led_trigger_format_name(phy, plt->name, sizeof(plt->name),
94 plt->trigger.name = plt->name;
96 return led_trigger_register(&plt->trigger);
99 static void phy_led_trigger_unregister(struct phy_led_trigger *plt)
101 led_trigger_unregister(&plt->trigger);
104 int phy_led_triggers_register(struct phy_device *phy)
107 unsigned int speeds[50];
109 phy->phy_num_led_triggers = phy_supported_speeds(phy, speeds,
111 if (!phy->phy_num_led_triggers)
114 phy->led_link_trigger = devm_kzalloc(&phy->mdio.dev,
115 sizeof(*phy->led_link_trigger),
117 if (!phy->led_link_trigger) {
122 phy_led_trigger_format_name(phy, phy->led_link_trigger->name,
123 sizeof(phy->led_link_trigger->name),
125 phy->led_link_trigger->trigger.name = phy->led_link_trigger->name;
127 err = led_trigger_register(&phy->led_link_trigger->trigger);
131 phy->phy_led_triggers = devm_kzalloc(&phy->mdio.dev,
132 sizeof(struct phy_led_trigger) *
133 phy->phy_num_led_triggers,
135 if (!phy->phy_led_triggers) {
140 for (i = 0; i < phy->phy_num_led_triggers; i++) {
141 err = phy_led_trigger_register(phy, &phy->phy_led_triggers[i],
147 phy->last_triggered = NULL;
148 phy_led_trigger_change_speed(phy);
153 phy_led_trigger_unregister(&phy->phy_led_triggers[i]);
154 devm_kfree(&phy->mdio.dev, phy->phy_led_triggers);
156 phy_led_trigger_unregister(phy->led_link_trigger);
158 devm_kfree(&phy->mdio.dev, phy->led_link_trigger);
159 phy->led_link_trigger = NULL;
161 phy->phy_num_led_triggers = 0;
164 EXPORT_SYMBOL_GPL(phy_led_triggers_register);
166 void phy_led_triggers_unregister(struct phy_device *phy)
170 for (i = 0; i < phy->phy_num_led_triggers; i++)
171 phy_led_trigger_unregister(&phy->phy_led_triggers[i]);
173 if (phy->led_link_trigger)
174 phy_led_trigger_unregister(phy->led_link_trigger);
176 EXPORT_SYMBOL_GPL(phy_led_triggers_unregister);