diff options
Diffstat (limited to 'drivers/net/wireless/rtl818x/rtl8187_leds.c')
| -rw-r--r-- | drivers/net/wireless/rtl818x/rtl8187_leds.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/drivers/net/wireless/rtl818x/rtl8187_leds.c b/drivers/net/wireless/rtl818x/rtl8187_leds.c new file mode 100644 index 000000000000..b44253592243 --- /dev/null +++ b/drivers/net/wireless/rtl818x/rtl8187_leds.c @@ -0,0 +1,218 @@ +/* + * Linux LED driver for RTL8187 + * + * Copyright 2009 Larry Finger <Larry.Finger@lwfinger.net> + * + * Based on the LED handling in the r8187 driver, which is: + * Copyright (c) Realtek Semiconductor Corp. All rights reserved. + * + * Thanks to Realtek for their support! + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifdef CONFIG_RTL8187_LEDS + +#include <net/mac80211.h> +#include <linux/usb.h> +#include <linux/eeprom_93cx6.h> + +#include "rtl8187.h" +#include "rtl8187_leds.h" + +static void led_turn_on(struct work_struct *work) +{ + /* As this routine does read/write operations on the hardware, it must + * be run from a work queue. + */ + u8 reg; + struct rtl8187_priv *priv = container_of(work, struct rtl8187_priv, + led_on.work); + struct rtl8187_led *led = &priv->led_tx; + + /* Don't change the LED, when the device is down. */ + if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) + return ; + + /* Skip if the LED is not registered. */ + if (!led->dev) + return; + mutex_lock(&priv->conf_mutex); + switch (led->ledpin) { + case LED_PIN_GPIO0: + rtl818x_iowrite8(priv, &priv->map->GPIO, 0x01); + rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0x00); + break; + case LED_PIN_LED0: + reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~(1 << 4); + rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg); + break; + case LED_PIN_LED1: + reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~(1 << 5); + rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg); + break; + case LED_PIN_HW: + default: + break; + } + mutex_unlock(&priv->conf_mutex); +} + +static void led_turn_off(struct work_struct *work) +{ + /* As this routine does read/write operations on the hardware, it must + * be run from a work queue. + */ + u8 reg; + struct rtl8187_priv *priv = container_of(work, struct rtl8187_priv, + led_off.work); + struct rtl8187_led *led = &priv->led_tx; + + /* Don't change the LED, when the device is down. */ + if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) + return ; + + /* Skip if the LED is not registered. */ + if (!led->dev) + return; + mutex_lock(&priv->conf_mutex); + switch (led->ledpin) { + case LED_PIN_GPIO0: + rtl818x_iowrite8(priv, &priv->map->GPIO, 0x01); + rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0x01); + break; + case LED_PIN_LED0: + reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) | (1 << 4); + rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg); + break; + case LED_PIN_LED1: + reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) | (1 << 5); + rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg); + break; + case LED_PIN_HW: + default: + break; + } + mutex_unlock(&priv->conf_mutex); +} + +/* Callback from the LED subsystem. */ +static void rtl8187_led_brightness_set(struct led_classdev *led_dev, + enum led_brightness brightness) +{ + struct rtl8187_led *led = container_of(led_dev, struct rtl8187_led, + led_dev); + struct ieee80211_hw *hw = led->dev; + struct rtl8187_priv *priv = hw->priv; + + if (brightness == LED_OFF) { + queue_delayed_work(hw->workqueue, &priv->led_off, 0); + /* The LED is off for 1/20 sec so that it just blinks. */ + queue_delayed_work(hw->workqueue, &priv->led_on, HZ / 20); + } else + queue_delayed_work(hw->workqueue, &priv->led_on, 0); +} + +static int rtl8187_register_led(struct ieee80211_hw *dev, + struct rtl8187_led *led, const char *name, + const char *default_trigger, u8 ledpin) +{ + int err; + struct rtl8187_priv *priv = dev->priv; + + if (led->dev) + return -EEXIST; + if (!default_trigger) + return -EINVAL; + led->dev = dev; + led->ledpin = ledpin; + strncpy(led->name, name, sizeof(led->name)); + + led->led_dev.name = led->name; + led->led_dev.default_trigger = default_trigger; + led->led_dev.brightness_set = rtl8187_led_brightness_set; + + err = led_classdev_register(&priv->udev->dev, &led->led_dev); + if (err) { + printk(KERN_INFO "LEDs: Failed to register %s\n", name); + led->dev = NULL; + return err; + } + return 0; +} + +static void rtl8187_unregister_led(struct rtl8187_led *led) +{ + led_classdev_unregister(&led->led_dev); + led->dev = NULL; +} + +void rtl8187_leds_init(struct ieee80211_hw *dev, u16 custid) +{ + struct rtl8187_priv *priv = dev->priv; + char name[RTL8187_LED_MAX_NAME_LEN + 1]; + u8 ledpin; + int err; + + /* According to the vendor driver, the LED operation depends on the + * customer ID encoded in the EEPROM + */ + printk(KERN_INFO "rtl8187: Customer ID is 0x%02X\n", custid); + switch (custid) { + case EEPROM_CID_RSVD0: + case EEPROM_CID_RSVD1: + case EEPROM_CID_SERCOMM_PS: + case EEPROM_CID_QMI: + case EEPROM_CID_DELL: + case EEPROM_CID_TOSHIBA: + ledpin = LED_PIN_GPIO0; + break; + case EEPROM_CID_ALPHA0: + ledpin = LED_PIN_LED0; + break; + case EEPROM_CID_HW: + ledpin = LED_PIN_HW; + break; + default: + ledpin = LED_PIN_GPIO0; + } + + INIT_DELAYED_WORK(&priv->led_on, led_turn_on); + INIT_DELAYED_WORK(&priv->led_off, led_turn_off); + + snprintf(name, sizeof(name), + "rtl8187-%s::tx", wiphy_name(dev->wiphy)); + err = rtl8187_register_led(dev, &priv->led_tx, name, + ieee80211_get_tx_led_name(dev), ledpin); + if (err) + goto error; + snprintf(name, sizeof(name), + "rtl8187-%s::rx", wiphy_name(dev->wiphy)); + err = rtl8187_register_led(dev, &priv->led_rx, name, + ieee80211_get_rx_led_name(dev), ledpin); + if (!err) { + queue_delayed_work(dev->workqueue, &priv->led_on, 0); + return; + } + /* registration of RX LED failed - unregister TX */ + rtl8187_unregister_led(&priv->led_tx); +error: + /* If registration of either failed, cancel delayed work */ + cancel_delayed_work_sync(&priv->led_off); + cancel_delayed_work_sync(&priv->led_on); +} + +void rtl8187_leds_exit(struct ieee80211_hw *dev) +{ + struct rtl8187_priv *priv = dev->priv; + + rtl8187_unregister_led(&priv->led_tx); + /* turn the LED off before exiting */ + queue_delayed_work(dev->workqueue, &priv->led_off, 0); + cancel_delayed_work_sync(&priv->led_off); + rtl8187_unregister_led(&priv->led_rx); +} +#endif /* def CONFIG_RTL8187_LED */ + |