diff options
Diffstat (limited to 'drivers/net/wireless/b43legacy/rfkill.c')
| -rw-r--r-- | drivers/net/wireless/b43legacy/rfkill.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/drivers/net/wireless/b43legacy/rfkill.c b/drivers/net/wireless/b43legacy/rfkill.c new file mode 100644 index 000000000000..d178dfbb1c9f --- /dev/null +++ b/drivers/net/wireless/b43legacy/rfkill.c @@ -0,0 +1,205 @@ +/* + + 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 "radio.h" +#include "b43legacy.h" + +#include <linux/kmod.h> + + +/* Returns TRUE, if the radio is enabled in hardware. */ +static bool b43legacy_is_hw_radio_enabled(struct b43legacy_wldev *dev) +{ + if (dev->phy.rev >= 3) { + if (!(b43legacy_read32(dev, B43legacy_MMIO_RADIO_HWENABLED_HI) + & B43legacy_MMIO_RADIO_HWENABLED_HI_MASK)) + return 1; + } else { + if (b43legacy_read16(dev, B43legacy_MMIO_RADIO_HWENABLED_LO) + & B43legacy_MMIO_RADIO_HWENABLED_LO_MASK) + return 1; + } + return 0; +} + +/* The poll callback for the hardware button. */ +static void b43legacy_rfkill_poll(struct input_polled_dev *poll_dev) +{ + struct b43legacy_wldev *dev = poll_dev->private; + struct b43legacy_wl *wl = dev->wl; + bool enabled; + bool report_change = 0; + + mutex_lock(&wl->mutex); + if (unlikely(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)) { + mutex_unlock(&wl->mutex); + return; + } + enabled = b43legacy_is_hw_radio_enabled(dev); + if (unlikely(enabled != dev->radio_hw_enable)) { + dev->radio_hw_enable = enabled; + report_change = 1; + b43legacyinfo(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. + * This is called without locking. */ +static int b43legacy_rfkill_soft_toggle(void *data, enum rfkill_state state) +{ + struct b43legacy_wldev *dev = data; + struct b43legacy_wl *wl = dev->wl; + int err = -EBUSY; + + if (!wl->rfkill.registered) + return 0; + + mutex_lock(&wl->mutex); + if (b43legacy_status(dev) < B43legacy_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) + b43legacy_radio_turn_on(dev); + break; + case RFKILL_STATE_OFF: + if (dev->phy.radio_on) + b43legacy_radio_turn_off(dev, 0); + break; + } + +out_unlock: + mutex_unlock(&wl->mutex); + + return err; +} + +char *b43legacy_rfkill_led_name(struct b43legacy_wldev *dev) +{ + struct b43legacy_rfkill *rfk = &(dev->wl->rfkill); + + if (!rfk->registered) + return NULL; + return rfkill_get_led_name(rfk->rfkill); +} + +void b43legacy_rfkill_init(struct b43legacy_wldev *dev) +{ + struct b43legacy_wl *wl = dev->wl; + struct b43legacy_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), + "b43legacy-%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 = b43legacy_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 = b43legacy_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 + /* B43legacy RF-kill isn't useful without the rfkill-input subsystem. + * Try to load the module. */ + err = request_module("rfkill-input"); + if (err) + b43legacywarn(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; + b43legacywarn(wl, "RF-kill button init failed\n"); +} + +void b43legacy_rfkill_exit(struct b43legacy_wldev *dev) +{ + struct b43legacy_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; +} + |