2007-09-27 21:35:34 +02:00
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/*
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Broadcom B43 wireless driver
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RFKILL support
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Copyright (c) 2007 Michael Buesch <mb@bu3sch.de>
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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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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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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include "rfkill.h"
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#include "b43.h"
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2007-09-28 14:22:33 +02:00
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/* Returns TRUE, if the radio is enabled in hardware. */
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static bool b43_is_hw_radio_enabled(struct b43_wldev *dev)
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2007-09-27 21:35:34 +02:00
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{
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2007-09-28 14:22:33 +02:00
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if (dev->phy.rev >= 3) {
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if (!(b43_read32(dev, B43_MMIO_RADIO_HWENABLED_HI)
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& B43_MMIO_RADIO_HWENABLED_HI_MASK))
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return 1;
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} else {
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if (b43_read16(dev, B43_MMIO_RADIO_HWENABLED_LO)
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& B43_MMIO_RADIO_HWENABLED_LO_MASK)
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return 1;
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2007-09-27 21:35:34 +02:00
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}
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2007-09-28 14:22:33 +02:00
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return 0;
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2007-09-27 21:35:34 +02:00
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}
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2007-09-28 14:22:33 +02:00
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/* The poll callback for the hardware button. */
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static void b43_rfkill_poll(struct input_polled_dev *poll_dev)
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2007-09-27 21:35:34 +02:00
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{
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2007-09-28 14:22:33 +02:00
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struct b43_wldev *dev = poll_dev->private;
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2007-09-27 21:35:34 +02:00
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struct b43_wl *wl = dev->wl;
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2007-09-28 14:22:33 +02:00
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bool enabled;
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2007-09-27 21:35:34 +02:00
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2007-09-28 14:22:33 +02:00
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mutex_lock(&wl->mutex);
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2007-09-27 21:35:34 +02:00
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B43_WARN_ON(b43_status(dev) < B43_STAT_INITIALIZED);
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2007-09-28 14:22:33 +02:00
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enabled = b43_is_hw_radio_enabled(dev);
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if (unlikely(enabled != dev->radio_hw_enable)) {
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dev->radio_hw_enable = enabled;
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b43info(wl, "Radio hardware status changed to %s\n",
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enabled ? "ENABLED" : "DISABLED");
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mutex_unlock(&wl->mutex);
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input_report_key(poll_dev->input, KEY_WLAN, enabled);
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} else
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mutex_unlock(&wl->mutex);
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2007-09-27 21:35:34 +02:00
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}
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2007-10-28 17:27:10 +01:00
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/* Called when the RFKILL toggled in software. */
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2007-09-27 21:35:34 +02:00
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static int b43_rfkill_soft_toggle(void *data, enum rfkill_state state)
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{
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struct b43_wldev *dev = data;
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struct b43_wl *wl = dev->wl;
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int err = 0;
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2007-10-28 17:27:10 +01:00
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/* When RFKILL is registered, it will call back into this callback.
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* wl->mutex will already be locked when this happens.
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* So first trylock. On contention check if we are in initialization.
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* Silently return if that happens to avoid a deadlock. */
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if (mutex_trylock(&wl->mutex) == 0) {
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if (b43_status(dev) < B43_STAT_INITIALIZED)
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return 0;
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mutex_lock(&wl->mutex);
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}
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2007-09-27 21:35:34 +02:00
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if (b43_status(dev) < B43_STAT_INITIALIZED)
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goto out_unlock;
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switch (state) {
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case RFKILL_STATE_ON:
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if (!dev->radio_hw_enable) {
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/* No luck. We can't toggle the hardware RF-kill
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* button from software. */
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err = -EBUSY;
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goto out_unlock;
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}
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if (!dev->phy.radio_on)
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b43_radio_turn_on(dev);
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break;
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case RFKILL_STATE_OFF:
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if (dev->phy.radio_on)
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b43_radio_turn_off(dev, 0);
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break;
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}
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out_unlock:
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mutex_unlock(&wl->mutex);
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return err;
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}
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char * b43_rfkill_led_name(struct b43_wldev *dev)
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{
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struct b43_wl *wl = dev->wl;
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if (!wl->rfkill.rfkill)
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return NULL;
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return rfkill_get_led_name(wl->rfkill.rfkill);
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}
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void b43_rfkill_init(struct b43_wldev *dev)
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{
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struct b43_wl *wl = dev->wl;
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struct b43_rfkill *rfk = &(wl->rfkill);
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int err;
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2007-09-28 14:22:33 +02:00
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if (rfk->rfkill) {
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err = rfkill_register(rfk->rfkill);
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if (err) {
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b43warn(wl, "Failed to register RF-kill button\n");
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goto err_free_rfk;
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}
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}
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if (rfk->poll_dev) {
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err = input_register_polled_device(rfk->poll_dev);
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if (err) {
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b43warn(wl, "Failed to register RF-kill polldev\n");
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goto err_free_polldev;
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}
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}
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return;
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err_free_rfk:
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rfkill_free(rfk->rfkill);
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rfk->rfkill = NULL;
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err_free_polldev:
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input_free_polled_device(rfk->poll_dev);
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rfk->poll_dev = NULL;
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}
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void b43_rfkill_exit(struct b43_wldev *dev)
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{
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struct b43_rfkill *rfk = &(dev->wl->rfkill);
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if (rfk->poll_dev)
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input_unregister_polled_device(rfk->poll_dev);
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if (rfk->rfkill)
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rfkill_unregister(rfk->rfkill);
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}
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void b43_rfkill_alloc(struct b43_wldev *dev)
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{
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struct b43_wl *wl = dev->wl;
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struct b43_rfkill *rfk = &(wl->rfkill);
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2007-09-27 21:35:34 +02:00
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snprintf(rfk->name, sizeof(rfk->name),
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"b43-%s", wiphy_name(wl->hw->wiphy));
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2007-09-28 14:22:33 +02:00
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2007-09-27 21:35:34 +02:00
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rfk->rfkill = rfkill_allocate(dev->dev->dev, RFKILL_TYPE_WLAN);
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2007-09-28 14:22:33 +02:00
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if (!rfk->rfkill) {
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b43warn(wl, "Failed to allocate RF-kill button\n");
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return;
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}
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2007-09-27 21:35:34 +02:00
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rfk->rfkill->name = rfk->name;
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rfk->rfkill->state = RFKILL_STATE_ON;
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rfk->rfkill->data = dev;
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rfk->rfkill->toggle_radio = b43_rfkill_soft_toggle;
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rfk->rfkill->user_claim_unsupported = 1;
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2007-09-28 14:22:33 +02:00
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rfk->poll_dev = input_allocate_polled_device();
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if (rfk->poll_dev) {
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rfk->poll_dev->private = dev;
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rfk->poll_dev->poll = b43_rfkill_poll;
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rfk->poll_dev->poll_interval = 1000; /* msecs */
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} else
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b43warn(wl, "Failed to allocate RF-kill polldev\n");
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2007-09-27 21:35:34 +02:00
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}
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2007-09-28 14:22:33 +02:00
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void b43_rfkill_free(struct b43_wldev *dev)
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2007-09-27 21:35:34 +02:00
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{
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struct b43_rfkill *rfk = &(dev->wl->rfkill);
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2007-09-28 14:22:33 +02:00
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input_free_polled_device(rfk->poll_dev);
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rfk->poll_dev = NULL;
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2007-09-27 21:35:34 +02:00
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rfkill_free(rfk->rfkill);
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rfk->rfkill = NULL;
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}
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