diff options
Diffstat (limited to 'drivers/net/wireless/b43/rfkill.c')
| -rw-r--r-- | drivers/net/wireless/b43/rfkill.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/drivers/net/wireless/b43/rfkill.c b/drivers/net/wireless/b43/rfkill.c new file mode 100644 index 00000000000..c25fd9956a9 --- /dev/null +++ b/drivers/net/wireless/b43/rfkill.c @@ -0,0 +1,155 @@ +/* + + Broadcom B43 wireless driver + RFKILL support + + Copyright (c) 2007 Michael Buesch <mb@bu3sch.de> + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; see the file COPYING. If not, write to + the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor, + Boston, MA 02110-1301, USA. + +*/ + +#include "rfkill.h" +#include "b43.h" + + +static void b43_notify_rfkill_press(struct work_struct *work) +{ + struct b43_rfkill *rfk = container_of(work, struct b43_rfkill, + notify_work); + struct b43_wl *wl = container_of(rfk, struct b43_wl, rfkill); + struct b43_wldev *dev; + enum rfkill_state state; + + mutex_lock(&wl->mutex); + dev = wl->current_dev; + if (b43_status(dev) < B43_STAT_INITIALIZED) { + mutex_unlock(&wl->mutex); + return; + } + if (dev->radio_hw_enable) + state = RFKILL_STATE_ON; + else + state = RFKILL_STATE_OFF; + b43info(wl, "Radio hardware status changed to %s\n", + dev->radio_hw_enable ? "ENABLED" : "DISABLED"); + mutex_unlock(&wl->mutex); + + if (rfk->rfkill) { + /* Be careful. This calls back into the software toggle routines. + * So we must unlock before calling. */ + rfkill_switch_all(rfk->rfkill->type, state); + } +} + +/* Called when the RFKILL toggled in hardware. + * This is called with the mutex locked. */ +void b43_rfkill_toggled(struct b43_wldev *dev, bool on) +{ + struct b43_wl *wl = dev->wl; + + B43_WARN_ON(b43_status(dev) < B43_STAT_INITIALIZED); + /* Update the RF status asynchronously, as rfkill will + * call back into the software toggle handler. + * This would deadlock if done synchronously. */ + queue_work(wl->hw->workqueue, &wl->rfkill.notify_work); +} + +/* Called when the RFKILL toggled in software. + * This is called without locking. */ +static int b43_rfkill_soft_toggle(void *data, enum rfkill_state state) +{ + struct b43_wldev *dev = data; + struct b43_wl *wl = dev->wl; + int err = 0; + + mutex_lock(&wl->mutex); + if (b43_status(dev) < B43_STAT_INITIALIZED) + goto out_unlock; + + switch (state) { + case RFKILL_STATE_ON: + if (!dev->radio_hw_enable) { + /* No luck. We can't toggle the hardware RF-kill + * button from software. */ + err = -EBUSY; + goto out_unlock; + } + if (!dev->phy.radio_on) + b43_radio_turn_on(dev); + break; + case RFKILL_STATE_OFF: + if (dev->phy.radio_on) + b43_radio_turn_off(dev, 0); + break; + } + +out_unlock: + mutex_unlock(&wl->mutex); + + return err; +} + +char * b43_rfkill_led_name(struct b43_wldev *dev) +{ + struct b43_wl *wl = dev->wl; + + if (!wl->rfkill.rfkill) + return NULL; + return rfkill_get_led_name(wl->rfkill.rfkill); +} + +void b43_rfkill_init(struct b43_wldev *dev) +{ + struct b43_wl *wl = dev->wl; + struct b43_rfkill *rfk = &(wl->rfkill); + int err; + + snprintf(rfk->name, sizeof(rfk->name), + "b43-%s", wiphy_name(wl->hw->wiphy)); + rfk->rfkill = rfkill_allocate(dev->dev->dev, RFKILL_TYPE_WLAN); + if (!rfk->rfkill) + goto error; + rfk->rfkill->name = rfk->name; + rfk->rfkill->state = RFKILL_STATE_ON; + rfk->rfkill->data = dev; + rfk->rfkill->toggle_radio = b43_rfkill_soft_toggle; + rfk->rfkill->user_claim_unsupported = 1; + + INIT_WORK(&rfk->notify_work, b43_notify_rfkill_press); + + err = rfkill_register(rfk->rfkill); + if (err) + goto error; + + return; +error: + b43warn(dev->wl, "Failed to initialize the RF-kill button\n"); + rfkill_free(rfk->rfkill); + rfk->rfkill = NULL; +} + +void b43_rfkill_exit(struct b43_wldev *dev) +{ + struct b43_rfkill *rfk = &(dev->wl->rfkill); + + if (!rfk->rfkill) + return; + cancel_work_sync(&rfk->notify_work); + rfkill_unregister(rfk->rfkill); + rfkill_free(rfk->rfkill); + rfk->rfkill = NULL; +} |