[B43]: RF-kill support
This adds full support for the RFKILL button and
the RFKILL LED trigger.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/b43/rfkill.c b/drivers/net/wireless/b43/rfkill.c
new file mode 100644
index 0000000..c25fd99
--- /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;
+}