1// SPDX-License-Identifier: GPL-2.0+
  2/* Copyright (C) 2016 National Instruments Corp. */
 
 
 
 
 
 
 
 
 
 
  3#include <linux/leds.h>
  4#include <linux/phy.h>
  5#include <linux/phy_led_triggers.h>
  6#include <linux/netdevice.h>
  7
  8static struct phy_led_trigger *phy_speed_to_led_trigger(struct phy_device *phy,
  9							unsigned int speed)
 10{
 11	unsigned int i;
 12
 13	for (i = 0; i < phy->phy_num_led_triggers; i++) {
 14		if (phy->phy_led_triggers[i].speed == speed)
 15			return &phy->phy_led_triggers[i];
 16	}
 17	return NULL;
 18}
 19
 20static void phy_led_trigger_no_link(struct phy_device *phy)
 21{
 22	if (phy->last_triggered) {
 23		led_trigger_event(&phy->last_triggered->trigger, LED_OFF);
 24		led_trigger_event(&phy->led_link_trigger->trigger, LED_OFF);
 25		phy->last_triggered = NULL;
 26	}
 27}
 28
 29void phy_led_trigger_change_speed(struct phy_device *phy)
 30{
 31	struct phy_led_trigger *plt;
 32
 33	if (!phy->link)
 34		return phy_led_trigger_no_link(phy);
 35
 36	if (phy->speed == 0)
 37		return;
 38
 39	plt = phy_speed_to_led_trigger(phy, phy->speed);
 40	if (!plt) {
 41		netdev_alert(phy->attached_dev,
 42			     "No phy led trigger registered for speed(%d)\n",
 43			     phy->speed);
 44		return phy_led_trigger_no_link(phy);
 45	}
 46
 47	if (plt != phy->last_triggered) {
 48		if (!phy->last_triggered)
 49			led_trigger_event(&phy->led_link_trigger->trigger,
 50					  LED_FULL);
 51		else
 52			led_trigger_event(&phy->last_triggered->trigger, LED_OFF);
 53
 
 54		led_trigger_event(&plt->trigger, LED_FULL);
 55		phy->last_triggered = plt;
 56	}
 57}
 58EXPORT_SYMBOL_GPL(phy_led_trigger_change_speed);
 59
 60static void phy_led_trigger_format_name(struct phy_device *phy, char *buf,
 61					size_t size, const char *suffix)
 62{
 63	snprintf(buf, size, PHY_ID_FMT ":%s",
 64		 phy->mdio.bus->id, phy->mdio.addr, suffix);
 65}
 66
 67static int phy_led_trigger_register(struct phy_device *phy,
 68				    struct phy_led_trigger *plt,
 69				    unsigned int speed,
 70				    const char *suffix)
 71{
 
 
 72	plt->speed = speed;
 73	phy_led_trigger_format_name(phy, plt->name, sizeof(plt->name), suffix);
 
 
 
 
 
 
 
 
 
 
 74	plt->trigger.name = plt->name;
 75
 76	return led_trigger_register(&plt->trigger);
 77}
 78
 79static void phy_led_trigger_unregister(struct phy_led_trigger *plt)
 80{
 81	led_trigger_unregister(&plt->trigger);
 82}
 83
 84int phy_led_triggers_register(struct phy_device *phy)
 85{
 86	int i, err;
 87	unsigned int speeds[50];
 88
 89	phy->phy_num_led_triggers = phy_supported_speeds(phy, speeds,
 90							 ARRAY_SIZE(speeds));
 91	if (!phy->phy_num_led_triggers)
 92		return 0;
 93
 94	phy->led_link_trigger = devm_kzalloc(&phy->mdio.dev,
 95					     sizeof(*phy->led_link_trigger),
 96					     GFP_KERNEL);
 97	if (!phy->led_link_trigger) {
 98		err = -ENOMEM;
 99		goto out_clear;
100	}
101
102	err = phy_led_trigger_register(phy, phy->led_link_trigger, 0, "link");
 
 
 
 
 
103	if (err)
104		goto out_free_link;
105
106	phy->phy_led_triggers = devm_kcalloc(&phy->mdio.dev,
107					    phy->phy_num_led_triggers,
108					    sizeof(struct phy_led_trigger),
109					    GFP_KERNEL);
110	if (!phy->phy_led_triggers) {
111		err = -ENOMEM;
112		goto out_unreg_link;
113	}
114
115	for (i = 0; i < phy->phy_num_led_triggers; i++) {
116		err = phy_led_trigger_register(phy, &phy->phy_led_triggers[i],
117					       speeds[i],
118					       phy_speed_to_str(speeds[i]));
119		if (err)
120			goto out_unreg;
121	}
122
123	phy->last_triggered = NULL;
124	phy_led_trigger_change_speed(phy);
125
126	return 0;
127out_unreg:
128	while (i--)
129		phy_led_trigger_unregister(&phy->phy_led_triggers[i]);
130	devm_kfree(&phy->mdio.dev, phy->phy_led_triggers);
131out_unreg_link:
132	phy_led_trigger_unregister(phy->led_link_trigger);
133out_free_link:
134	devm_kfree(&phy->mdio.dev, phy->led_link_trigger);
135	phy->led_link_trigger = NULL;
136out_clear:
137	phy->phy_num_led_triggers = 0;
138	return err;
139}
140EXPORT_SYMBOL_GPL(phy_led_triggers_register);
141
142void phy_led_triggers_unregister(struct phy_device *phy)
143{
144	int i;
145
146	for (i = 0; i < phy->phy_num_led_triggers; i++)
147		phy_led_trigger_unregister(&phy->phy_led_triggers[i]);
148
149	if (phy->led_link_trigger)
150		phy_led_trigger_unregister(phy->led_link_trigger);
151}
152EXPORT_SYMBOL_GPL(phy_led_triggers_unregister);

  1/* Copyright (C) 2016 National Instruments Corp.
  2 *
  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.
  7 *
  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.
 12 */
 13#include <linux/leds.h>
 14#include <linux/phy.h>
 15#include <linux/phy_led_triggers.h>
 16#include <linux/netdevice.h>
 17
 18static struct phy_led_trigger *phy_speed_to_led_trigger(struct phy_device *phy,
 19							unsigned int speed)
 20{
 21	unsigned int i;
 22
 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];
 26	}
 27	return NULL;
 28}
 29
 30static void phy_led_trigger_no_link(struct phy_device *phy)
 31{
 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;
 36	}
 37}
 38
 39void phy_led_trigger_change_speed(struct phy_device *phy)
 40{
 41	struct phy_led_trigger *plt;
 42
 43	if (!phy->link)
 44		return phy_led_trigger_no_link(phy);
 45
 46	if (phy->speed == 0)
 47		return;
 48
 49	plt = phy_speed_to_led_trigger(phy, phy->speed);
 50	if (!plt) {
 51		netdev_alert(phy->attached_dev,
 52			     "No phy led trigger registered for speed(%d)\n",
 53			     phy->speed);
 54		return phy_led_trigger_no_link(phy);
 55	}
 56
 57	if (plt != phy->last_triggered) {
 58		if (!phy->last_triggered)
 59			led_trigger_event(&phy->led_link_trigger->trigger,
 60					  LED_FULL);
 
 
 61
 62		led_trigger_event(&phy->last_triggered->trigger, LED_OFF);
 63		led_trigger_event(&plt->trigger, LED_FULL);
 64		phy->last_triggered = plt;
 65	}
 66}
 67EXPORT_SYMBOL_GPL(phy_led_trigger_change_speed);
 68
 69static void phy_led_trigger_format_name(struct phy_device *phy, char *buf,
 70					size_t size, char *suffix)
 71{
 72	snprintf(buf, size, PHY_ID_FMT ":%s",
 73		 phy->mdio.bus->id, phy->mdio.addr, suffix);
 74}
 75
 76static int phy_led_trigger_register(struct phy_device *phy,
 77				    struct phy_led_trigger *plt,
 78				    unsigned int speed)
 
 79{
 80	char name_suffix[PHY_LED_TRIGGER_SPEED_SUFFIX_SIZE];
 81
 82	plt->speed = speed;
 83
 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");
 88	else
 89		snprintf(name_suffix, sizeof(name_suffix), "%dGbps",
 90			 DIV_ROUND_CLOSEST(speed, 1000));
 91
 92	phy_led_trigger_format_name(phy, plt->name, sizeof(plt->name),
 93				    name_suffix);
 94	plt->trigger.name = plt->name;
 95
 96	return led_trigger_register(&plt->trigger);
 97}
 98
 99static void phy_led_trigger_unregister(struct phy_led_trigger *plt)
100{
101	led_trigger_unregister(&plt->trigger);
102}
103
104int phy_led_triggers_register(struct phy_device *phy)
105{
106	int i, err;
107	unsigned int speeds[50];
108
109	phy->phy_num_led_triggers = phy_supported_speeds(phy, speeds,
110							 ARRAY_SIZE(speeds));
111	if (!phy->phy_num_led_triggers)
112		return 0;
113
114	phy->led_link_trigger = devm_kzalloc(&phy->mdio.dev,
115					     sizeof(*phy->led_link_trigger),
116					     GFP_KERNEL);
117	if (!phy->led_link_trigger) {
118		err = -ENOMEM;
119		goto out_clear;
120	}
121
122	phy_led_trigger_format_name(phy, phy->led_link_trigger->name,
123				    sizeof(phy->led_link_trigger->name),
124				    "link");
125	phy->led_link_trigger->trigger.name = phy->led_link_trigger->name;
126
127	err = led_trigger_register(&phy->led_link_trigger->trigger);
128	if (err)
129		goto out_free_link;
130
131	phy->phy_led_triggers = devm_kzalloc(&phy->mdio.dev,
132					    sizeof(struct phy_led_trigger) *
133						   phy->phy_num_led_triggers,
134					    GFP_KERNEL);
135	if (!phy->phy_led_triggers) {
136		err = -ENOMEM;
137		goto out_unreg_link;
138	}
139
140	for (i = 0; i < phy->phy_num_led_triggers; i++) {
141		err = phy_led_trigger_register(phy, &phy->phy_led_triggers[i],
142					       speeds[i]);
 
143		if (err)
144			goto out_unreg;
145	}
146
147	phy->last_triggered = NULL;
148	phy_led_trigger_change_speed(phy);
149
150	return 0;
151out_unreg:
152	while (i--)
153		phy_led_trigger_unregister(&phy->phy_led_triggers[i]);
154	devm_kfree(&phy->mdio.dev, phy->phy_led_triggers);
155out_unreg_link:
156	phy_led_trigger_unregister(phy->led_link_trigger);
157out_free_link:
158	devm_kfree(&phy->mdio.dev, phy->led_link_trigger);
159	phy->led_link_trigger = NULL;
160out_clear:
161	phy->phy_num_led_triggers = 0;
162	return err;
163}
164EXPORT_SYMBOL_GPL(phy_led_triggers_register);
165
166void phy_led_triggers_unregister(struct phy_device *phy)
167{
168	int i;
169
170	for (i = 0; i < phy->phy_num_led_triggers; i++)
171		phy_led_trigger_unregister(&phy->phy_led_triggers[i]);
172
173	if (phy->led_link_trigger)
174		phy_led_trigger_unregister(phy->led_link_trigger);
175}
176EXPORT_SYMBOL_GPL(phy_led_triggers_unregister);