| /* |
| |
| 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" |
| |
| |
| /* 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); |
| B43_WARN_ON(b43_status(dev) < B43_STAT_INITIALIZED); |
| 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); |
| |
| if (unlikely(report_change)) |
| input_report_key(poll_dev->input, KEY_WLAN, enabled); |
| } |
| |
| /* 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 = 0; |
| |
| if (!wl->rfkill.registered) |
| return 0; |
| |
| mutex_lock(&wl->mutex); |
| B43_WARN_ON(b43_status(dev) < B43_STAT_INITIALIZED); |
| 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) |
| goto err_free_rfk; |
| rfk->poll_dev->private = dev; |
| rfk->poll_dev->poll = b43_rfkill_poll; |
| rfk->poll_dev->poll_interval = 1000; /* msecs */ |
| |
| err = rfkill_register(rfk->rfkill); |
| if (err) |
| goto err_free_polldev; |
| 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_free_rfk: |
| rfkill_free(rfk->rfkill); |
| 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; |
| rfkill_free(rfk->rfkill); |
| rfk->rfkill = NULL; |
| } |