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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 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  * James P. Ketrenos <ipw2100-admin@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/version.h>
  31 #include <linux/init.h>
  32
  33 #include <net/mac80211.h>
  34
  35 #include "iwl-eeprom.h"
  36 #include "iwl-core.h"
  37 #include "iwl-4965.h"
  38 #include "iwl-helpers.h"
  39
  40
  41 static inline int iwl_is_rfkill(struct iwl_priv *priv)
  42 {
  43         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
  44                 test_bit(STATUS_RF_KILL_SW, &priv->status);
  45 }
  46
  47
  48 /* software rf-kill from user */
  49 static int iwl_rfkill_soft_rf_kill(void *data, enum rfkill_state state)
  50 {
  51         struct iwl_priv *priv = data;
  52         int err = 0;
  53
  54         if (!priv->rfkill_mngr.rfkill)
  55                 return 0;
  56
  57         IWL_DEBUG_RF_KILL("we recieved soft RFKILL set to state %d\n", state);
  58         mutex_lock(&priv->mutex);
  59
  60         switch (state) {
  61         case RFKILL_STATE_ON:
  62                 priv->cfg->ops->lib->radio_kill_sw(priv, 0);
  63                 /* if HW rf-kill is set dont allow ON state */
  64                 if (iwl_is_rfkill(priv))
  65                         err = -EBUSY;
  66                 break;
  67         case RFKILL_STATE_OFF:
  68                 priv->cfg->ops->lib->radio_kill_sw(priv, 1);
  69                 if (!iwl_is_rfkill(priv))
  70                         err = -EBUSY;
  71                 break;
  72         }
  73         mutex_unlock(&priv->mutex);
  74
  75         return err;
  76 }
  77
  78 int iwl_rfkill_init(struct iwl_priv *priv)
  79 {
  80         struct device *device = wiphy_dev(priv->hw->wiphy);
  81         int ret = 0;
  82
  83         BUG_ON(device == NULL);
  84
  85         priv->rfkill_mngr.rfkill = rfkill_allocate(device, RFKILL_TYPE_WLAN);
  86         if (!priv->rfkill_mngr.rfkill) {
  87                 ret = -ENOMEM;
  88                 goto error;
  89         }
  90
  91         priv->rfkill_mngr.rfkill->name = priv->cfg->name;
  92         priv->rfkill_mngr.rfkill->data = priv;
  93         priv->rfkill_mngr.rfkill->state = RFKILL_STATE_ON;
  94         priv->rfkill_mngr.rfkill->toggle_radio = iwl_rfkill_soft_rf_kill;
  95         priv->rfkill_mngr.rfkill->user_claim_unsupported = 1;
  96
  97         priv->rfkill_mngr.rfkill->dev.class->suspend = NULL;
  98         priv->rfkill_mngr.rfkill->dev.class->resume = NULL;
  99
 100         priv->rfkill_mngr.input_dev = input_allocate_device();
 101         if (!priv->rfkill_mngr.input_dev) {
 102                 ret = -ENOMEM;
 103                 goto freed_rfkill;
 104         }
 105
 106         priv->rfkill_mngr.input_dev->name = priv->cfg->name;
 107         priv->rfkill_mngr.input_dev->phys = wiphy_name(priv->hw->wiphy);
 108         priv->rfkill_mngr.input_dev->id.bustype = BUS_HOST;
 109         priv->rfkill_mngr.input_dev->id.vendor = priv->pci_dev->vendor;
 110         priv->rfkill_mngr.input_dev->dev.parent = device;
 111         priv->rfkill_mngr.input_dev->evbit[0] = BIT(EV_KEY);
 112         set_bit(KEY_WLAN, priv->rfkill_mngr.input_dev->keybit);
 113
 114         ret = rfkill_register(priv->rfkill_mngr.rfkill);
 115         if (ret)
 116                 goto free_input_dev;
 117
 118         ret = input_register_device(priv->rfkill_mngr.input_dev);
 119         if (ret)
 120                 goto unregister_rfkill;
 121
 122         return ret;
 123
 124 unregister_rfkill:
 125         rfkill_unregister(priv->rfkill_mngr.rfkill);
 126
 127 free_input_dev:
 128         input_free_device(priv->rfkill_mngr.input_dev);
 129         priv->rfkill_mngr.input_dev = NULL;
 130
 131 freed_rfkill:
 132         rfkill_free(priv->rfkill_mngr.rfkill);
 133         priv->rfkill_mngr.rfkill = NULL;
 134
 135 error:
 136         return ret;
 137 }
 138 EXPORT_SYMBOL(iwl_rfkill_init);
 139
 140 void iwl_rfkill_unregister(struct iwl_priv *priv)
 141 {
 142
 143         if (priv->rfkill_mngr.input_dev)
 144                 input_unregister_device(priv->rfkill_mngr.input_dev);
 145
 146         if (priv->rfkill_mngr.rfkill)
 147                 rfkill_unregister(priv->rfkill_mngr.rfkill);
 148 }
 149 EXPORT_SYMBOL(iwl_rfkill_unregister);
 150
 151
 152 void iwl_rfkill_free(struct iwl_priv *priv)
 153 {
 154         if (priv->rfkill_mngr.input_dev)
 155                 input_free_device(priv->rfkill_mngr.input_dev);
 156
 157         if (priv->rfkill_mngr.rfkill)
 158                 rfkill_free(priv->rfkill_mngr.rfkill);
 159 }
 160 EXPORT_SYMBOL(iwl_rfkill_free);
 161
 162 /* set rf-kill to the right state. */
 163 void iwl_rfkill_set_hw_state(struct iwl_priv *priv)
 164 {
 165
 166         if (!priv->rfkill_mngr.rfkill)
 167                 return;
 168
 169         if (!iwl_is_rfkill(priv))
 170                 priv->rfkill_mngr.rfkill->state = RFKILL_STATE_ON;
 171         else
 172                 priv->rfkill_mngr.rfkill->state = RFKILL_STATE_OFF;
 173 }
 174 EXPORT_SYMBOL(iwl_rfkill_set_hw_state);