243 lines
6.3 KiB
C
243 lines
6.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Linux LED driver for RTL8187
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*
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* Copyright 2009 Larry Finger <Larry.Finger@lwfinger.net>
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*
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* Based on the LED handling in the r8187 driver, which is:
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* Copyright (c) Realtek Semiconductor Corp. All rights reserved.
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*
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* Thanks to Realtek for their support!
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*/
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#ifdef CONFIG_RTL8187_LEDS
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#include <net/mac80211.h>
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#include <linux/usb.h>
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#include <linux/eeprom_93cx6.h>
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#include "rtl8187.h"
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#include "leds.h"
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static void led_turn_on(struct work_struct *work)
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{
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/* As this routine does read/write operations on the hardware, it must
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* be run from a work queue.
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*/
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u8 reg;
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struct rtl8187_priv *priv = container_of(work, struct rtl8187_priv,
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led_on.work);
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struct rtl8187_led *led = &priv->led_tx;
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/* Don't change the LED, when the device is down. */
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if (!priv->vif || priv->vif->type == NL80211_IFTYPE_UNSPECIFIED)
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return ;
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/* Skip if the LED is not registered. */
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if (!led->dev)
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return;
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mutex_lock(&priv->conf_mutex);
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switch (led->ledpin) {
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case LED_PIN_GPIO0:
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rtl818x_iowrite8(priv, &priv->map->GPIO0, 0x01);
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rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0x00);
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break;
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case LED_PIN_LED0:
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reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~(1 << 4);
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rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
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break;
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case LED_PIN_LED1:
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reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~(1 << 5);
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rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
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break;
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case LED_PIN_HW:
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default:
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break;
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}
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mutex_unlock(&priv->conf_mutex);
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}
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static void led_turn_off(struct work_struct *work)
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{
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/* As this routine does read/write operations on the hardware, it must
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* be run from a work queue.
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*/
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u8 reg;
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struct rtl8187_priv *priv = container_of(work, struct rtl8187_priv,
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led_off.work);
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struct rtl8187_led *led = &priv->led_tx;
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/* Don't change the LED, when the device is down. */
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if (!priv->vif || priv->vif->type == NL80211_IFTYPE_UNSPECIFIED)
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return ;
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/* Skip if the LED is not registered. */
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if (!led->dev)
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return;
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mutex_lock(&priv->conf_mutex);
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switch (led->ledpin) {
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case LED_PIN_GPIO0:
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rtl818x_iowrite8(priv, &priv->map->GPIO0, 0x01);
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rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0x01);
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break;
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case LED_PIN_LED0:
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reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) | (1 << 4);
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rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
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break;
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case LED_PIN_LED1:
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reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) | (1 << 5);
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rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
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break;
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case LED_PIN_HW:
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default:
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break;
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}
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mutex_unlock(&priv->conf_mutex);
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}
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/* Callback from the LED subsystem. */
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static void rtl8187_led_brightness_set(struct led_classdev *led_dev,
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enum led_brightness brightness)
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{
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struct rtl8187_led *led = container_of(led_dev, struct rtl8187_led,
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led_dev);
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struct ieee80211_hw *hw = led->dev;
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struct rtl8187_priv *priv;
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static bool radio_on;
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if (!hw)
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return;
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priv = hw->priv;
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if (led->is_radio) {
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if (brightness == LED_FULL) {
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ieee80211_queue_delayed_work(hw, &priv->led_on, 0);
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radio_on = true;
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} else if (radio_on) {
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radio_on = false;
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cancel_delayed_work(&priv->led_on);
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ieee80211_queue_delayed_work(hw, &priv->led_off, 0);
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}
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} else if (radio_on) {
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if (brightness == LED_OFF) {
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ieee80211_queue_delayed_work(hw, &priv->led_off, 0);
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/* The LED is off for 1/20 sec - it just blinks. */
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ieee80211_queue_delayed_work(hw, &priv->led_on,
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HZ / 20);
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} else
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ieee80211_queue_delayed_work(hw, &priv->led_on, 0);
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}
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}
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static int rtl8187_register_led(struct ieee80211_hw *dev,
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struct rtl8187_led *led, const char *name,
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const char *default_trigger, u8 ledpin,
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bool is_radio)
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{
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int err;
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struct rtl8187_priv *priv = dev->priv;
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if (led->dev)
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return -EEXIST;
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if (!default_trigger)
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return -EINVAL;
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led->dev = dev;
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led->ledpin = ledpin;
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led->is_radio = is_radio;
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strscpy(led->name, name, sizeof(led->name));
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led->led_dev.name = led->name;
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led->led_dev.default_trigger = default_trigger;
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led->led_dev.brightness_set = rtl8187_led_brightness_set;
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err = led_classdev_register(&priv->udev->dev, &led->led_dev);
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if (err) {
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printk(KERN_INFO "LEDs: Failed to register %s\n", name);
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led->dev = NULL;
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return err;
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}
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return 0;
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}
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static void rtl8187_unregister_led(struct rtl8187_led *led)
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{
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struct ieee80211_hw *hw = led->dev;
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struct rtl8187_priv *priv = hw->priv;
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led_classdev_unregister(&led->led_dev);
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flush_delayed_work(&priv->led_off);
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led->dev = NULL;
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}
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void rtl8187_leds_init(struct ieee80211_hw *dev, u16 custid)
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{
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struct rtl8187_priv *priv = dev->priv;
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char name[RTL8187_LED_MAX_NAME_LEN + 1];
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u8 ledpin;
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int err;
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/* According to the vendor driver, the LED operation depends on the
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* customer ID encoded in the EEPROM
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*/
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printk(KERN_INFO "rtl8187: Customer ID is 0x%02X\n", custid);
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switch (custid) {
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case EEPROM_CID_RSVD0:
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case EEPROM_CID_RSVD1:
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case EEPROM_CID_SERCOMM_PS:
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case EEPROM_CID_QMI:
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case EEPROM_CID_DELL:
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case EEPROM_CID_TOSHIBA:
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ledpin = LED_PIN_GPIO0;
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break;
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case EEPROM_CID_ALPHA0:
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ledpin = LED_PIN_LED0;
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break;
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case EEPROM_CID_HW:
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ledpin = LED_PIN_HW;
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break;
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default:
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ledpin = LED_PIN_GPIO0;
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}
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INIT_DELAYED_WORK(&priv->led_on, led_turn_on);
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INIT_DELAYED_WORK(&priv->led_off, led_turn_off);
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snprintf(name, sizeof(name),
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"rtl8187-%s::radio", wiphy_name(dev->wiphy));
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err = rtl8187_register_led(dev, &priv->led_radio, name,
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ieee80211_get_radio_led_name(dev), ledpin, true);
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if (err)
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return;
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snprintf(name, sizeof(name),
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"rtl8187-%s::tx", wiphy_name(dev->wiphy));
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err = rtl8187_register_led(dev, &priv->led_tx, name,
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ieee80211_get_tx_led_name(dev), ledpin, false);
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if (err)
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goto err_tx;
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snprintf(name, sizeof(name),
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"rtl8187-%s::rx", wiphy_name(dev->wiphy));
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err = rtl8187_register_led(dev, &priv->led_rx, name,
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ieee80211_get_rx_led_name(dev), ledpin, false);
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if (!err)
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return;
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/* registration of RX LED failed - unregister */
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rtl8187_unregister_led(&priv->led_tx);
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err_tx:
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rtl8187_unregister_led(&priv->led_radio);
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}
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void rtl8187_leds_exit(struct ieee80211_hw *dev)
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{
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struct rtl8187_priv *priv = dev->priv;
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rtl8187_unregister_led(&priv->led_radio);
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rtl8187_unregister_led(&priv->led_rx);
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rtl8187_unregister_led(&priv->led_tx);
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cancel_delayed_work_sync(&priv->led_off);
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cancel_delayed_work_sync(&priv->led_on);
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}
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#endif /* def CONFIG_RTL8187_LEDS */
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