140 строки
3.6 KiB
C
140 строки
3.6 KiB
C
/* Copyright (C) 2016 National Instruments Corp.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/leds.h>
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#include <linux/phy.h>
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#include <linux/phy_led_triggers.h>
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#include <linux/netdevice.h>
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static struct phy_led_trigger *phy_speed_to_led_trigger(struct phy_device *phy,
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unsigned int speed)
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{
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unsigned int i;
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for (i = 0; i < phy->phy_num_led_triggers; i++) {
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if (phy->phy_led_triggers[i].speed == speed)
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return &phy->phy_led_triggers[i];
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}
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return NULL;
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}
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void phy_led_trigger_change_speed(struct phy_device *phy)
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{
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struct phy_led_trigger *plt;
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if (!phy->link)
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goto out_change_speed;
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if (phy->speed == 0)
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return;
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plt = phy_speed_to_led_trigger(phy, phy->speed);
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if (!plt) {
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netdev_alert(phy->attached_dev,
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"No phy led trigger registered for speed(%d)\n",
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phy->speed);
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goto out_change_speed;
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}
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if (plt != phy->last_triggered) {
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led_trigger_event(&phy->last_triggered->trigger, LED_OFF);
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led_trigger_event(&plt->trigger, LED_FULL);
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phy->last_triggered = plt;
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}
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return;
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out_change_speed:
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if (phy->last_triggered) {
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led_trigger_event(&phy->last_triggered->trigger,
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LED_OFF);
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phy->last_triggered = NULL;
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}
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}
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EXPORT_SYMBOL_GPL(phy_led_trigger_change_speed);
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static int phy_led_trigger_register(struct phy_device *phy,
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struct phy_led_trigger *plt,
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unsigned int speed)
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{
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char name_suffix[PHY_LED_TRIGGER_SPEED_SUFFIX_SIZE];
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plt->speed = speed;
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if (speed < SPEED_1000)
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snprintf(name_suffix, sizeof(name_suffix), "%dMbps", speed);
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else if (speed == SPEED_2500)
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snprintf(name_suffix, sizeof(name_suffix), "2.5Gbps");
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else
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snprintf(name_suffix, sizeof(name_suffix), "%dGbps",
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DIV_ROUND_CLOSEST(speed, 1000));
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snprintf(plt->name, sizeof(plt->name), PHY_ID_FMT ":%s",
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phy->mdio.bus->id, phy->mdio.addr, name_suffix);
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plt->trigger.name = plt->name;
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return led_trigger_register(&plt->trigger);
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}
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static void phy_led_trigger_unregister(struct phy_led_trigger *plt)
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{
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led_trigger_unregister(&plt->trigger);
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}
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int phy_led_triggers_register(struct phy_device *phy)
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{
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int i, err;
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unsigned int speeds[50];
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phy->phy_num_led_triggers = phy_supported_speeds(phy, speeds,
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ARRAY_SIZE(speeds));
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if (!phy->phy_num_led_triggers)
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return 0;
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phy->phy_led_triggers = devm_kzalloc(&phy->mdio.dev,
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sizeof(struct phy_led_trigger) *
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phy->phy_num_led_triggers,
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GFP_KERNEL);
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if (!phy->phy_led_triggers) {
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err = -ENOMEM;
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goto out_clear;
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}
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for (i = 0; i < phy->phy_num_led_triggers; i++) {
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err = phy_led_trigger_register(phy, &phy->phy_led_triggers[i],
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speeds[i]);
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if (err)
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goto out_unreg;
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}
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phy->last_triggered = NULL;
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phy_led_trigger_change_speed(phy);
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return 0;
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out_unreg:
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while (i--)
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phy_led_trigger_unregister(&phy->phy_led_triggers[i]);
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devm_kfree(&phy->mdio.dev, phy->phy_led_triggers);
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out_clear:
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phy->phy_num_led_triggers = 0;
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return err;
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}
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EXPORT_SYMBOL_GPL(phy_led_triggers_register);
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void phy_led_triggers_unregister(struct phy_device *phy)
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{
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int i;
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for (i = 0; i < phy->phy_num_led_triggers; i++)
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phy_led_trigger_unregister(&phy->phy_led_triggers[i]);
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}
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EXPORT_SYMBOL_GPL(phy_led_triggers_unregister);
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