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