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 8 #include "phylib-internal.h" 9 10 static struct phy_led_trigger *phy_speed_to_led_trigger(struct phy_device *phy, 11 unsigned int speed) 12 { 13 unsigned int i; 14 15 for (i = 0; i < phy->phy_num_led_triggers; i++) { 16 if (phy->phy_led_triggers[i].speed == speed) 17 return &phy->phy_led_triggers[i]; 18 } 19 return NULL; 20 } 21 22 static void phy_led_trigger_no_link(struct phy_device *phy) 23 { 24 if (phy->last_triggered) { 25 led_trigger_event(&phy->last_triggered->trigger, LED_OFF); 26 led_trigger_event(&phy->led_link_trigger->trigger, LED_OFF); 27 phy->last_triggered = NULL; 28 } 29 } 30 31 void phy_led_trigger_change_speed(struct phy_device *phy) 32 { 33 struct phy_led_trigger *plt; 34 35 if (!phy->link) 36 return phy_led_trigger_no_link(phy); 37 38 if (phy->speed == 0) 39 return; 40 41 plt = phy_speed_to_led_trigger(phy, phy->speed); 42 if (!plt) { 43 netdev_alert(phy->attached_dev, 44 "No phy led trigger registered for speed(%d)\n", 45 phy->speed); 46 return phy_led_trigger_no_link(phy); 47 } 48 49 if (plt != phy->last_triggered) { 50 if (!phy->last_triggered) 51 led_trigger_event(&phy->led_link_trigger->trigger, 52 LED_FULL); 53 else 54 led_trigger_event(&phy->last_triggered->trigger, LED_OFF); 55 56 led_trigger_event(&plt->trigger, LED_FULL); 57 phy->last_triggered = plt; 58 } 59 } 60 EXPORT_SYMBOL_GPL(phy_led_trigger_change_speed); 61 62 static void phy_led_trigger_format_name(struct phy_device *phy, char *buf, 63 size_t size, const char *suffix) 64 { 65 snprintf(buf, size, PHY_ID_FMT ":%s", 66 phy->mdio.bus->id, phy->mdio.addr, suffix); 67 } 68 69 static int phy_led_trigger_register(struct phy_device *phy, 70 struct phy_led_trigger *plt, 71 unsigned int speed, 72 const char *suffix) 73 { 74 plt->speed = speed; 75 phy_led_trigger_format_name(phy, plt->name, sizeof(plt->name), suffix); 76 plt->trigger.name = plt->name; 77 78 return led_trigger_register(&plt->trigger); 79 } 80 81 static void phy_led_trigger_unregister(struct phy_led_trigger *plt) 82 { 83 led_trigger_unregister(&plt->trigger); 84 } 85 86 int phy_led_triggers_register(struct phy_device *phy) 87 { 88 int i, err; 89 unsigned int speeds[50]; 90 91 phy->phy_num_led_triggers = phy_supported_speeds(phy, speeds, 92 ARRAY_SIZE(speeds)); 93 if (!phy->phy_num_led_triggers) 94 return 0; 95 96 phy->led_link_trigger = kzalloc_obj(*phy->led_link_trigger); 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 = kzalloc_objs(struct phy_led_trigger, 107 phy->phy_num_led_triggers, 108 GFP_KERNEL); 109 if (!phy->phy_led_triggers) { 110 err = -ENOMEM; 111 goto out_unreg_link; 112 } 113 114 for (i = 0; i < phy->phy_num_led_triggers; i++) { 115 err = phy_led_trigger_register(phy, &phy->phy_led_triggers[i], 116 speeds[i], 117 phy_speed_to_str(speeds[i])); 118 if (err) 119 goto out_unreg; 120 } 121 122 phy->last_triggered = NULL; 123 phy_led_trigger_change_speed(phy); 124 125 return 0; 126 out_unreg: 127 while (i--) 128 phy_led_trigger_unregister(&phy->phy_led_triggers[i]); 129 kfree(phy->phy_led_triggers); 130 out_unreg_link: 131 phy_led_trigger_unregister(phy->led_link_trigger); 132 out_free_link: 133 kfree(phy->led_link_trigger); 134 phy->led_link_trigger = NULL; 135 out_clear: 136 phy->phy_num_led_triggers = 0; 137 return err; 138 } 139 EXPORT_SYMBOL_GPL(phy_led_triggers_register); 140 141 void phy_led_triggers_unregister(struct phy_device *phy) 142 { 143 int i; 144 145 for (i = 0; i < phy->phy_num_led_triggers; i++) 146 phy_led_trigger_unregister(&phy->phy_led_triggers[i]); 147 kfree(phy->phy_led_triggers); 148 phy->phy_led_triggers = NULL; 149 150 if (phy->led_link_trigger) { 151 phy_led_trigger_unregister(phy->led_link_trigger); 152 kfree(phy->led_link_trigger); 153 phy->led_link_trigger = NULL; 154 } 155 } 156 EXPORT_SYMBOL_GPL(phy_led_triggers_unregister); 157