drivers/net/wireless/iwlwifi/iwl-rfkill.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28 #include <linux/kernel.h>
  29 #include <linux/module.h>
  30 #include <linux/init.h>
  31
  32 #include <net/mac80211.h>
  33
  34 #include "iwl-eeprom.h"
  35 #include "iwl-dev.h"
  36 #include "iwl-core.h"
  37
  38 /* software rf-kill from user */
  39 static int iwl_rfkill_soft_rf_kill(void *data, bool blocked)
  40 {
  41         struct iwl_priv *priv = data;
  42
  43         if (!priv->rfkill)
  44                 return -EINVAL;
  45
  46         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
  47                 return 0;
  48
  49         IWL_DEBUG_RF_KILL(priv, "received soft RFKILL: block=%d\n", blocked);
  50
  51         mutex_lock(&priv->mutex);
  52
  53         if (iwl_is_rfkill_hw(priv))
  54                 goto out_unlock;
  55
  56         if (!blocked)
  57                 iwl_radio_kill_sw_enable_radio(priv);
  58         else
  59                 iwl_radio_kill_sw_disable_radio(priv);
  60
  61 out_unlock:
  62         mutex_unlock(&priv->mutex);
  63         return 0;
  64 }
  65
  66 static const struct rfkill_ops iwl_rfkill_ops = {
  67         .set_block = iwl_rfkill_soft_rf_kill,
  68 };
  69
  70 int iwl_rfkill_init(struct iwl_priv *priv)
  71 {
  72         struct device *device = wiphy_dev(priv->hw->wiphy);
  73         int ret = 0;
  74
  75         BUG_ON(device == NULL);
  76
  77         IWL_DEBUG_RF_KILL(priv, "Initializing RFKILL.\n");
  78         priv->rfkill = rfkill_alloc(priv->cfg->name,
  79                                     device,
  80                                     RFKILL_TYPE_WLAN,
  81                                     &iwl_rfkill_ops, priv);
  82         if (!priv->rfkill) {
  83                 IWL_ERR(priv, "Unable to allocate RFKILL device.\n");
  84                 ret = -ENOMEM;
  85                 goto error;
  86         }
  87
  88         ret = rfkill_register(priv->rfkill);
  89         if (ret) {
  90                 IWL_ERR(priv, "Unable to register RFKILL: %d\n", ret);
  91                 goto free_rfkill;
  92         }
  93
  94         IWL_DEBUG_RF_KILL(priv, "RFKILL initialization complete.\n");
  95         return 0;
  96
  97 free_rfkill:
  98         rfkill_destroy(priv->rfkill);
  99         priv->rfkill = NULL;
 100
 101 error:
 102         IWL_DEBUG_RF_KILL(priv, "RFKILL initialization complete.\n");
 103         return ret;
 104 }
 105 EXPORT_SYMBOL(iwl_rfkill_init);
 106
 107 void iwl_rfkill_unregister(struct iwl_priv *priv)
 108 {
 109
 110         if (priv->rfkill) {
 111                 rfkill_unregister(priv->rfkill);
 112                 rfkill_destroy(priv->rfkill);
 113         }
 114
 115         priv->rfkill = NULL;
 116 }
 117 EXPORT_SYMBOL(iwl_rfkill_unregister);
 118
 119 /* set RFKILL to the right state. */
 120 void iwl_rfkill_set_hw_state(struct iwl_priv *priv)
 121 {
 122         if (!priv->rfkill)
 123                 return;
 124
 125         if (rfkill_set_hw_state(priv->rfkill,
 126                                 !!iwl_is_rfkill_hw(priv)))
 127                 iwl_radio_kill_sw_disable_radio(priv);
 128         else
 129                 iwl_radio_kill_sw_enable_radio(priv);
 130 }
 131 EXPORT_SYMBOL(iwl_rfkill_set_hw_state);