/* Copyright (C) 2004 - 2008 rt2x00 SourceForge Project <http://rt2x00.serialmonkey.com> 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; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Module: rt2x00rfkill Abstract: rt2x00 rfkill routines. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/rfkill.h> #include "rt2x00.h" #include "rt2x00lib.h" static int rt2x00rfkill_toggle_radio(void *data, enum rfkill_state state) { struct rt2x00_dev *rt2x00dev = data; int retval = 0; if (unlikely(!rt2x00dev)) return 0; /* * Only continue if there are enabled interfaces. */ if (!test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) return 0; if (state == RFKILL_STATE_UNBLOCKED) { INFO(rt2x00dev, "RFKILL event: enabling radio.\n"); clear_bit(DEVICE_STATE_DISABLED_RADIO_HW, &rt2x00dev->flags); retval = rt2x00lib_enable_radio(rt2x00dev); } else if (state == RFKILL_STATE_SOFT_BLOCKED) { INFO(rt2x00dev, "RFKILL event: disabling radio.\n"); set_bit(DEVICE_STATE_DISABLED_RADIO_HW, &rt2x00dev->flags); rt2x00lib_disable_radio(rt2x00dev); } else { WARNING(rt2x00dev, "RFKILL event: unknown state %d.\n", state); } return retval; } static int rt2x00rfkill_get_state(void *data, enum rfkill_state *state) { struct rt2x00_dev *rt2x00dev = data; /* * rfkill_poll reports 1 when the key has been pressed and the * radio should be blocked. */ *state = rt2x00dev->ops->lib->rfkill_poll(rt2x00dev) ? RFKILL_STATE_SOFT_BLOCKED : RFKILL_STATE_UNBLOCKED; return 0; } static void rt2x00rfkill_poll(struct work_struct *work) { struct rt2x00_dev *rt2x00dev = container_of(work, struct rt2x00_dev, rfkill_work.work); enum rfkill_state state; if (!test_bit(RFKILL_STATE_REGISTERED, &rt2x00dev->rfkill_state) || !test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags)) return; /* * Poll latest state and report it to rfkill who should sort * out if the state should be toggled or not. */ if (!rt2x00rfkill_get_state(rt2x00dev, &state)) rfkill_force_state(rt2x00dev->rfkill, state); queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->rfkill_work, RFKILL_POLL_INTERVAL); } void rt2x00rfkill_register(struct rt2x00_dev *rt2x00dev) { if (!test_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->rfkill_state) || test_bit(RFKILL_STATE_REGISTERED, &rt2x00dev->rfkill_state)) return; if (rfkill_register(rt2x00dev->rfkill)) { ERROR(rt2x00dev, "Failed to register rfkill handler.\n"); return; } __set_bit(RFKILL_STATE_REGISTERED, &rt2x00dev->rfkill_state); /* * Force initial poll which will detect the initial device state, * and correctly sends the signal to the rfkill layer about this * state. */ rt2x00rfkill_poll(&rt2x00dev->rfkill_work.work); } void rt2x00rfkill_unregister(struct rt2x00_dev *rt2x00dev) { if (!test_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->rfkill_state) || !test_bit(RFKILL_STATE_REGISTERED, &rt2x00dev->rfkill_state)) return; cancel_delayed_work_sync(&rt2x00dev->rfkill_work); rfkill_unregister(rt2x00dev->rfkill); __clear_bit(RFKILL_STATE_REGISTERED, &rt2x00dev->rfkill_state); } void rt2x00rfkill_allocate(struct rt2x00_dev *rt2x00dev) { struct device *dev = wiphy_dev(rt2x00dev->hw->wiphy); if (test_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->rfkill_state)) return; rt2x00dev->rfkill = rfkill_allocate(dev, RFKILL_TYPE_WLAN); if (!rt2x00dev->rfkill) { ERROR(rt2x00dev, "Failed to allocate rfkill handler.\n"); return; } __set_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->rfkill_state); rt2x00dev->rfkill->name = rt2x00dev->ops->name; rt2x00dev->rfkill->data = rt2x00dev; rt2x00dev->rfkill->toggle_radio = rt2x00rfkill_toggle_radio; if (test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags)) { rt2x00dev->rfkill->get_state = rt2x00rfkill_get_state; rt2x00dev->rfkill->state = rt2x00dev->ops->lib->rfkill_poll(rt2x00dev) ? RFKILL_STATE_SOFT_BLOCKED : RFKILL_STATE_UNBLOCKED; } else { rt2x00dev->rfkill->state = RFKILL_STATE_UNBLOCKED; } INIT_DELAYED_WORK(&rt2x00dev->rfkill_work, rt2x00rfkill_poll); return; } void rt2x00rfkill_free(struct rt2x00_dev *rt2x00dev) { if (!test_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->flags)) return; cancel_delayed_work_sync(&rt2x00dev->rfkill_work); rfkill_free(rt2x00dev->rfkill); rt2x00dev->rfkill = NULL; }