b43legacy: RF-kill support
This adds full support for the RFKILL button and the RFKILL LED trigger. This is a port to b43legacy of a patch by Michael Buesch <mb@bu3sch.de> for b43. Signed-off-by: Larry Finger<Larry.Finger@lwfinger.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Larry Finger
committed by
David S. Miller
David S. Miller
parent
ba48f7bb80
commit
93bb7f3a7b
158
drivers/net/wireless/b43legacy/rfkill.c
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158
drivers/net/wireless/b43legacy/rfkill.c
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/*
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Broadcom B43legacy 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 "radio.h"
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#include "b43legacy.h"
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static void b43legacy_notify_rfkill_press(struct work_struct *work)
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{
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struct b43legacy_rfkill *rfk = container_of(work,
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struct b43legacy_rfkill,
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notify_work);
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struct b43legacy_wl *wl = container_of(rfk, struct b43legacy_wl,
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rfkill);
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struct b43legacy_wldev *dev;
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enum rfkill_state state;
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mutex_lock(&wl->mutex);
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dev = wl->current_dev;
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if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
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mutex_unlock(&wl->mutex);
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return;
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}
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if (dev->radio_hw_enable)
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state = RFKILL_STATE_ON;
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else
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state = RFKILL_STATE_OFF;
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b43legacyinfo(wl, "Radio hardware status changed to %s\n",
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dev->radio_hw_enable ? "ENABLED" : "DISABLED");
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mutex_unlock(&wl->mutex);
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if (rfk->rfkill) {
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/* Be careful. This calls back into the software toggle
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* routines. So we must unlock before calling. */
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rfkill_switch_all(rfk->rfkill->type, state);
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}
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}
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/* Called when the RFKILL toggled in hardware.
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* This is called with the mutex locked. */
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void b43legacy_rfkill_toggled(struct b43legacy_wldev *dev, bool on)
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{
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struct b43legacy_wl *wl = dev->wl;
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B43legacy_WARN_ON(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED);
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/* Update the RF status asynchronously, as rfkill will
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* call back into the software toggle handler.
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* This would deadlock if done synchronously. */
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queue_work(wl->hw->workqueue, &wl->rfkill.notify_work);
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}
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/* Called when the RFKILL toggled in software.
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* This is called without locking. */
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static int b43legacy_rfkill_soft_toggle(void *data, enum rfkill_state state)
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{
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struct b43legacy_wldev *dev = data;
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struct b43legacy_wl *wl = dev->wl;
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int err = 0;
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mutex_lock(&wl->mutex);
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if (b43legacy_status(dev) < B43legacy_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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b43legacy_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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b43legacy_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 *b43legacy_rfkill_led_name(struct b43legacy_wldev *dev)
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{
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struct b43legacy_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 b43legacy_rfkill_init(struct b43legacy_wldev *dev)
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{
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struct b43legacy_wl *wl = dev->wl;
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struct b43legacy_rfkill *rfk = &(wl->rfkill);
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int err;
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snprintf(rfk->name, sizeof(rfk->name),
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"b43legacy-%s", wiphy_name(wl->hw->wiphy));
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rfk->rfkill = rfkill_allocate(dev->dev->dev, RFKILL_TYPE_WLAN);
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if (!rfk->rfkill)
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goto error;
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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 = b43legacy_rfkill_soft_toggle;
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rfk->rfkill->user_claim_unsupported = 1;
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INIT_WORK(&rfk->notify_work, b43legacy_notify_rfkill_press);
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err = rfkill_register(rfk->rfkill);
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if (err)
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goto error;
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return;
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error:
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b43legacywarn(dev->wl, "Failed to initialize the RF-kill button\n");
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rfkill_free(rfk->rfkill);
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rfk->rfkill = NULL;
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}
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void b43legacy_rfkill_exit(struct b43legacy_wldev *dev)
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{
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struct b43legacy_rfkill *rfk = &(dev->wl->rfkill);
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if (!rfk->rfkill)
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return;
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cancel_work_sync(&rfk->notify_work);
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rfkill_unregister(rfk->rfkill);
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rfkill_free(rfk->rfkill);
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rfk->rfkill = NULL;
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}
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