/* 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; }