-/*
-
- 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"
-
-#include <linux/kmod.h>
-
-
-/* Returns TRUE, if the radio is enabled in hardware. */
-static bool b43_is_hw_radio_enabled(struct b43_wldev *dev)
-{
- if (dev->phy.rev >= 3) {
- if (!(b43_read32(dev, B43_MMIO_RADIO_HWENABLED_HI)
- & B43_MMIO_RADIO_HWENABLED_HI_MASK))
- return 1;
- } else {
- if (b43_read16(dev, B43_MMIO_RADIO_HWENABLED_LO)
- & B43_MMIO_RADIO_HWENABLED_LO_MASK)
- return 1;
- }
- return 0;
-}
-
-/* The poll callback for the hardware button. */
-static void b43_rfkill_poll(struct input_polled_dev *poll_dev)
-{
- struct b43_wldev *dev = poll_dev->private;
- struct b43_wl *wl = dev->wl;
- bool enabled;
- bool report_change = 0;
-
- mutex_lock(&wl->mutex);
- if (unlikely(b43_status(dev) < B43_STAT_INITIALIZED)) {
- mutex_unlock(&wl->mutex);
- return;
- }
- enabled = b43_is_hw_radio_enabled(dev);
- if (unlikely(enabled != dev->radio_hw_enable)) {
- dev->radio_hw_enable = enabled;
- report_change = 1;
- b43info(wl, "Radio hardware status changed to %s\n",
- enabled ? "ENABLED" : "DISABLED");
- }
- mutex_unlock(&wl->mutex);
-
- /* send the radio switch event to the system - note both a key press
- * and a release are required */
- if (unlikely(report_change)) {
- input_report_key(poll_dev->input, KEY_WLAN, 1);
- input_report_key(poll_dev->input, KEY_WLAN, 0);
- }
-}
-
-/* Called when the RFKILL toggled in software. */
-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 = -EBUSY;
-
- if (!wl->rfkill.registered)
- return 0;
-
- mutex_lock(&wl->mutex);
- if (b43_status(dev) < B43_STAT_INITIALIZED)
- goto out_unlock;
- err = 0;
- 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_rfkill *rfk = &(dev->wl->rfkill);
-
- if (!rfk->registered)
- return NULL;
- return rfkill_get_led_name(rfk->rfkill);
-}
-
-void b43_rfkill_init(struct b43_wldev *dev)
-{
- struct b43_wl *wl = dev->wl;
- struct b43_rfkill *rfk = &(wl->rfkill);
- int err;
-
- rfk->registered = 0;
-
- rfk->rfkill = rfkill_allocate(dev->dev->dev, RFKILL_TYPE_WLAN);
- if (!rfk->rfkill)
- goto out_error;
- snprintf(rfk->name, sizeof(rfk->name),
- "b43-%s", wiphy_name(wl->hw->wiphy));
- 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;
-
- rfk->poll_dev = input_allocate_polled_device();
- if (!rfk->poll_dev) {
- rfkill_free(rfk->rfkill);
- goto err_freed_rfk;
- }
-
- rfk->poll_dev->private = dev;
- rfk->poll_dev->poll = b43_rfkill_poll;
- rfk->poll_dev->poll_interval = 1000; /* msecs */
-
- rfk->poll_dev->input->name = rfk->name;
- rfk->poll_dev->input->id.bustype = BUS_HOST;
- rfk->poll_dev->input->id.vendor = dev->dev->bus->boardinfo.vendor;
- rfk->poll_dev->input->evbit[0] = BIT(EV_KEY);
- set_bit(KEY_WLAN, rfk->poll_dev->input->keybit);
-
- err = rfkill_register(rfk->rfkill);
- if (err)
- goto err_free_polldev;
-
-#ifdef CONFIG_RFKILL_INPUT_MODULE
- /* B43 RF-kill isn't useful without the rfkill-input subsystem.
- * Try to load the module. */
- err = request_module("rfkill-input");
- if (err)
- b43warn(wl, "Failed to load the rfkill-input module. "
- "The built-in radio LED will not work.\n");
-#endif /* CONFIG_RFKILL_INPUT */
-
- err = input_register_polled_device(rfk->poll_dev);
- if (err)
- goto err_unreg_rfk;
-
- rfk->registered = 1;
-
- return;
-err_unreg_rfk:
- rfkill_unregister(rfk->rfkill);
-err_free_polldev:
- input_free_polled_device(rfk->poll_dev);
- rfk->poll_dev = NULL;
-err_freed_rfk:
- rfk->rfkill = NULL;
-out_error:
- rfk->registered = 0;
- b43warn(wl, "RF-kill button init failed\n");
-}
-
-void b43_rfkill_exit(struct b43_wldev *dev)
-{
- struct b43_rfkill *rfk = &(dev->wl->rfkill);
-
- if (!rfk->registered)
- return;
- rfk->registered = 0;
-
- input_unregister_polled_device(rfk->poll_dev);
- rfkill_unregister(rfk->rfkill);
- input_free_polled_device(rfk->poll_dev);
- rfk->poll_dev = NULL;
- rfk->rfkill = NULL;
-}
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