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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
30void phy_led_trigger_change_speed(struct phy_device *phy)
31{
32 struct phy_led_trigger *plt;
33
34 if (!phy->link)
35 goto out_change_speed;
36
37 if (phy->speed == 0)
38 return;
39
40 plt = phy_speed_to_led_trigger(phy, phy->speed);
41 if (!plt) {
42 netdev_alert(phy->attached_dev,
43 "No phy led trigger registered for speed(%d)\n",
44 phy->speed);
45 goto out_change_speed;
46 }
47
48 if (plt != phy->last_triggered) {
49 led_trigger_event(&phy->last_triggered->trigger, LED_OFF);
50 led_trigger_event(&plt->trigger, LED_FULL);
51 phy->last_triggered = plt;
52 }
53 return;
54
55out_change_speed:
56 if (phy->last_triggered) {
57 led_trigger_event(&phy->last_triggered->trigger,
58 LED_OFF);
59 phy->last_triggered = NULL;
60 }
61}
62EXPORT_SYMBOL_GPL(phy_led_trigger_change_speed);
63
64static int phy_led_trigger_register(struct phy_device *phy,
65 struct phy_led_trigger *plt,
66 unsigned int speed)
67{
68 char name_suffix[PHY_LED_TRIGGER_SPEED_SUFFIX_SIZE];
69
70 plt->speed = speed;
71
72 if (speed < SPEED_1000)
73 snprintf(name_suffix, sizeof(name_suffix), "%dMbps", speed);
74 else if (speed == SPEED_2500)
75 snprintf(name_suffix, sizeof(name_suffix), "2.5Gbps");
76 else
77 snprintf(name_suffix, sizeof(name_suffix), "%dGbps",
78 DIV_ROUND_CLOSEST(speed, 1000));
79
80 snprintf(plt->name, sizeof(plt->name), PHY_ID_FMT ":%s",
81 phy->mdio.bus->id, phy->mdio.addr, name_suffix);
82 plt->trigger.name = plt->name;
83
84 return led_trigger_register(&plt->trigger);
85}
86
87static void phy_led_trigger_unregister(struct phy_led_trigger *plt)
88{
89 led_trigger_unregister(&plt->trigger);
90}
91
92int phy_led_triggers_register(struct phy_device *phy)
93{
94 int i, err;
95 unsigned int speeds[50];
96
97 phy->phy_num_led_triggers = phy_supported_speeds(phy, speeds,
98 ARRAY_SIZE(speeds));
99 if (!phy->phy_num_led_triggers)
100 return 0;
101
102 phy->phy_led_triggers = devm_kzalloc(&phy->mdio.dev,
103 sizeof(struct phy_led_trigger) *
104 phy->phy_num_led_triggers,
105 GFP_KERNEL);
106 if (!phy->phy_led_triggers) {
107 err = -ENOMEM;
108 goto out_clear;
109 }
110
111 for (i = 0; i < phy->phy_num_led_triggers; i++) {
112 err = phy_led_trigger_register(phy, &phy->phy_led_triggers[i],
113 speeds[i]);
114 if (err)
115 goto out_unreg;
116 }
117
118 phy->last_triggered = NULL;
119 phy_led_trigger_change_speed(phy);
120
121 return 0;
122out_unreg:
123 while (i--)
124 phy_led_trigger_unregister(&phy->phy_led_triggers[i]);
125 devm_kfree(&phy->mdio.dev, phy->phy_led_triggers);
126out_clear:
127 phy->phy_num_led_triggers = 0;
128 return err;
129}
130EXPORT_SYMBOL_GPL(phy_led_triggers_register);
131
132void phy_led_triggers_unregister(struct phy_device *phy)
133{
134 int i;
135
136 for (i = 0; i < phy->phy_num_led_triggers; i++)
137 phy_led_trigger_unregister(&phy->phy_led_triggers[i]);
138}
139EXPORT_SYMBOL_GPL(phy_led_triggers_unregister);