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350 lines
8.5 KiB
350 lines
8.5 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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Broadcom B43 wireless driver |
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LED control |
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Copyright (c) 2005 Martin Langer <[email protected]>, |
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Copyright (c) 2005 Stefano Brivio <[email protected]> |
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Copyright (c) 2005-2007 Michael Buesch <[email protected]> |
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Copyright (c) 2005 Danny van Dyk <[email protected]> |
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Copyright (c) 2005 Andreas Jaggi <[email protected]> |
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*/ |
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#include "b43.h" |
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#include "leds.h" |
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#include "rfkill.h" |
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static void b43_led_turn_on(struct b43_wldev *dev, u8 led_index, |
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bool activelow) |
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{ |
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u16 ctl; |
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ctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL); |
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if (activelow) |
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ctl &= ~(1 << led_index); |
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else |
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ctl |= (1 << led_index); |
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b43_write16(dev, B43_MMIO_GPIO_CONTROL, ctl); |
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} |
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static void b43_led_turn_off(struct b43_wldev *dev, u8 led_index, |
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bool activelow) |
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{ |
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u16 ctl; |
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ctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL); |
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if (activelow) |
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ctl |= (1 << led_index); |
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else |
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ctl &= ~(1 << led_index); |
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b43_write16(dev, B43_MMIO_GPIO_CONTROL, ctl); |
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} |
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static void b43_led_update(struct b43_wldev *dev, |
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struct b43_led *led) |
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{ |
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bool radio_enabled; |
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bool turn_on; |
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if (!led->wl) |
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return; |
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radio_enabled = (dev->phy.radio_on && dev->radio_hw_enable); |
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/* The led->state read is racy, but we don't care. In case we raced |
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* with the brightness_set handler, we will be called again soon |
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* to fixup our state. */ |
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if (radio_enabled) |
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turn_on = atomic_read(&led->state) != LED_OFF; |
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else |
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turn_on = false; |
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if (turn_on == led->hw_state) |
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return; |
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led->hw_state = turn_on; |
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if (turn_on) |
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b43_led_turn_on(dev, led->index, led->activelow); |
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else |
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b43_led_turn_off(dev, led->index, led->activelow); |
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} |
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static void b43_leds_work(struct work_struct *work) |
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{ |
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struct b43_leds *leds = container_of(work, struct b43_leds, work); |
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struct b43_wl *wl = container_of(leds, struct b43_wl, leds); |
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struct b43_wldev *dev; |
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mutex_lock(&wl->mutex); |
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dev = wl->current_dev; |
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if (unlikely(!dev || b43_status(dev) < B43_STAT_STARTED)) |
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goto out_unlock; |
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b43_led_update(dev, &wl->leds.led_tx); |
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b43_led_update(dev, &wl->leds.led_rx); |
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b43_led_update(dev, &wl->leds.led_radio); |
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b43_led_update(dev, &wl->leds.led_assoc); |
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out_unlock: |
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mutex_unlock(&wl->mutex); |
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} |
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/* Callback from the LED subsystem. */ |
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static void b43_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 b43_led *led = container_of(led_dev, struct b43_led, led_dev); |
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struct b43_wl *wl = led->wl; |
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if (likely(!wl->leds.stop)) { |
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atomic_set(&led->state, brightness); |
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ieee80211_queue_work(wl->hw, &wl->leds.work); |
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} |
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} |
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static int b43_register_led(struct b43_wldev *dev, struct b43_led *led, |
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const char *name, const char *default_trigger, |
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u8 led_index, bool activelow) |
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{ |
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int err; |
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if (led->wl) |
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return -EEXIST; |
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if (!default_trigger) |
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return -EINVAL; |
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led->wl = dev->wl; |
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led->index = led_index; |
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led->activelow = activelow; |
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strlcpy(led->name, name, sizeof(led->name)); |
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atomic_set(&led->state, 0); |
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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 = b43_led_brightness_set; |
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err = led_classdev_register(dev->dev->dev, &led->led_dev); |
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if (err) { |
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b43warn(dev->wl, "LEDs: Failed to register %s\n", name); |
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led->wl = 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 b43_unregister_led(struct b43_led *led) |
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{ |
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if (!led->wl) |
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return; |
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led_classdev_unregister(&led->led_dev); |
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led->wl = NULL; |
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} |
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static void b43_map_led(struct b43_wldev *dev, |
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u8 led_index, |
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enum b43_led_behaviour behaviour, |
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bool activelow) |
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{ |
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struct ieee80211_hw *hw = dev->wl->hw; |
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char name[B43_LED_MAX_NAME_LEN + 1]; |
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/* Map the b43 specific LED behaviour value to the |
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* generic LED triggers. */ |
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switch (behaviour) { |
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case B43_LED_INACTIVE: |
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case B43_LED_OFF: |
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case B43_LED_ON: |
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break; |
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case B43_LED_ACTIVITY: |
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case B43_LED_TRANSFER: |
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case B43_LED_APTRANSFER: |
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snprintf(name, sizeof(name), |
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"b43-%s::tx", wiphy_name(hw->wiphy)); |
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b43_register_led(dev, &dev->wl->leds.led_tx, name, |
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ieee80211_get_tx_led_name(hw), |
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led_index, activelow); |
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snprintf(name, sizeof(name), |
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"b43-%s::rx", wiphy_name(hw->wiphy)); |
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b43_register_led(dev, &dev->wl->leds.led_rx, name, |
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ieee80211_get_rx_led_name(hw), |
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led_index, activelow); |
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break; |
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case B43_LED_RADIO_ALL: |
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case B43_LED_RADIO_A: |
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case B43_LED_RADIO_B: |
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case B43_LED_MODE_BG: |
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snprintf(name, sizeof(name), |
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"b43-%s::radio", wiphy_name(hw->wiphy)); |
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b43_register_led(dev, &dev->wl->leds.led_radio, name, |
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ieee80211_get_radio_led_name(hw), |
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led_index, activelow); |
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break; |
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case B43_LED_WEIRD: |
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case B43_LED_ASSOC: |
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snprintf(name, sizeof(name), |
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"b43-%s::assoc", wiphy_name(hw->wiphy)); |
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b43_register_led(dev, &dev->wl->leds.led_assoc, name, |
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ieee80211_get_assoc_led_name(hw), |
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led_index, activelow); |
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break; |
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default: |
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b43warn(dev->wl, "LEDs: Unknown behaviour 0x%02X\n", |
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behaviour); |
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break; |
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} |
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} |
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static void b43_led_get_sprominfo(struct b43_wldev *dev, |
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unsigned int led_index, |
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enum b43_led_behaviour *behaviour, |
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bool *activelow) |
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{ |
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u8 sprom[4]; |
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sprom[0] = dev->dev->bus_sprom->gpio0; |
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sprom[1] = dev->dev->bus_sprom->gpio1; |
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sprom[2] = dev->dev->bus_sprom->gpio2; |
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sprom[3] = dev->dev->bus_sprom->gpio3; |
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if ((sprom[0] & sprom[1] & sprom[2] & sprom[3]) == 0xff) { |
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/* There is no LED information in the SPROM |
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* for this LED. Hardcode it here. */ |
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*activelow = false; |
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switch (led_index) { |
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case 0: |
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*behaviour = B43_LED_ACTIVITY; |
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*activelow = true; |
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if (dev->dev->board_vendor == PCI_VENDOR_ID_COMPAQ) |
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*behaviour = B43_LED_RADIO_ALL; |
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break; |
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case 1: |
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*behaviour = B43_LED_RADIO_B; |
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if (dev->dev->board_vendor == PCI_VENDOR_ID_ASUSTEK) |
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*behaviour = B43_LED_ASSOC; |
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break; |
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case 2: |
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*behaviour = B43_LED_RADIO_A; |
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break; |
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case 3: |
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*behaviour = B43_LED_OFF; |
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break; |
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default: |
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*behaviour = B43_LED_OFF; |
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B43_WARN_ON(1); |
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return; |
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} |
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} else { |
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/* keep LED disabled if no mapping is defined */ |
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if (sprom[led_index] == 0xff) |
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*behaviour = B43_LED_OFF; |
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else |
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*behaviour = sprom[led_index] & B43_LED_BEHAVIOUR; |
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*activelow = !!(sprom[led_index] & B43_LED_ACTIVELOW); |
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} |
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} |
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void b43_leds_init(struct b43_wldev *dev) |
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{ |
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struct b43_led *led; |
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unsigned int i; |
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enum b43_led_behaviour behaviour; |
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bool activelow; |
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/* Sync the RF-kill LED state (if we have one) with radio and switch states. */ |
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led = &dev->wl->leds.led_radio; |
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if (led->wl) { |
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if (dev->phy.radio_on && b43_is_hw_radio_enabled(dev)) { |
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b43_led_turn_on(dev, led->index, led->activelow); |
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led->hw_state = true; |
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atomic_set(&led->state, 1); |
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} else { |
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b43_led_turn_off(dev, led->index, led->activelow); |
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led->hw_state = false; |
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atomic_set(&led->state, 0); |
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} |
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} |
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/* Initialize TX/RX/ASSOC leds */ |
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led = &dev->wl->leds.led_tx; |
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if (led->wl) { |
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b43_led_turn_off(dev, led->index, led->activelow); |
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led->hw_state = false; |
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atomic_set(&led->state, 0); |
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} |
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led = &dev->wl->leds.led_rx; |
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if (led->wl) { |
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b43_led_turn_off(dev, led->index, led->activelow); |
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led->hw_state = false; |
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atomic_set(&led->state, 0); |
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} |
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led = &dev->wl->leds.led_assoc; |
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if (led->wl) { |
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b43_led_turn_off(dev, led->index, led->activelow); |
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led->hw_state = false; |
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atomic_set(&led->state, 0); |
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} |
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/* Initialize other LED states. */ |
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for (i = 0; i < B43_MAX_NR_LEDS; i++) { |
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b43_led_get_sprominfo(dev, i, &behaviour, &activelow); |
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switch (behaviour) { |
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case B43_LED_OFF: |
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b43_led_turn_off(dev, i, activelow); |
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break; |
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case B43_LED_ON: |
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b43_led_turn_on(dev, i, activelow); |
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break; |
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default: |
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/* Leave others as-is. */ |
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break; |
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} |
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} |
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dev->wl->leds.stop = 0; |
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} |
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void b43_leds_exit(struct b43_wldev *dev) |
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{ |
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struct b43_leds *leds = &dev->wl->leds; |
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b43_led_turn_off(dev, leds->led_tx.index, leds->led_tx.activelow); |
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b43_led_turn_off(dev, leds->led_rx.index, leds->led_rx.activelow); |
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b43_led_turn_off(dev, leds->led_assoc.index, leds->led_assoc.activelow); |
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b43_led_turn_off(dev, leds->led_radio.index, leds->led_radio.activelow); |
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} |
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void b43_leds_stop(struct b43_wldev *dev) |
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{ |
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struct b43_leds *leds = &dev->wl->leds; |
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leds->stop = 1; |
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cancel_work_sync(&leds->work); |
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} |
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void b43_leds_register(struct b43_wldev *dev) |
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{ |
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unsigned int i; |
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enum b43_led_behaviour behaviour; |
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bool activelow; |
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INIT_WORK(&dev->wl->leds.work, b43_leds_work); |
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/* Register the LEDs to the LED subsystem. */ |
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for (i = 0; i < B43_MAX_NR_LEDS; i++) { |
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b43_led_get_sprominfo(dev, i, &behaviour, &activelow); |
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b43_map_led(dev, i, behaviour, activelow); |
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} |
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} |
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void b43_leds_unregister(struct b43_wl *wl) |
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{ |
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struct b43_leds *leds = &wl->leds; |
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b43_unregister_led(&leds->led_tx); |
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b43_unregister_led(&leds->led_rx); |
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b43_unregister_led(&leds->led_assoc); |
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b43_unregister_led(&leds->led_radio); |
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}
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