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         IWL_DEBUG_RF_KILL("Initializing RFKILL.\n");
  79         priv->rfkill_mngr.rfkill = rfkill_allocate(device, RFKILL_TYPE_WLAN);
  80         if (!priv->rfkill_mngr.rfkill) {
  81                 IWL_ERROR("Unable to allocate rfkill device.\n");
  82                 ret = -ENOMEM;
  83                 goto error;
  84         }
  85
  86         priv->rfkill_mngr.rfkill->name = priv->cfg->name;
  87         priv->rfkill_mngr.rfkill->data = priv;
  88         priv->rfkill_mngr.rfkill->state = RFKILL_STATE_ON;
  89         priv->rfkill_mngr.rfkill->toggle_radio = iwl_rfkill_soft_rf_kill;
  90         priv->rfkill_mngr.rfkill->user_claim_unsupported = 1;
  91
  92         priv->rfkill_mngr.rfkill->dev.class->suspend = NULL;
  93         priv->rfkill_mngr.rfkill->dev.class->resume = NULL;
  94
  95         priv->rfkill_mngr.input_dev = input_allocate_device();
  96         if (!priv->rfkill_mngr.input_dev) {
  97                 IWL_ERROR("Unable to allocate rfkill input device.\n");
  98                 ret = -ENOMEM;
  99                 goto freed_rfkill;
 100         }
 101
 102         priv->rfkill_mngr.input_dev->name = priv->cfg->name;
 103         priv->rfkill_mngr.input_dev->phys = wiphy_name(priv->hw->wiphy);
 104         priv->rfkill_mngr.input_dev->id.bustype = BUS_HOST;
 105         priv->rfkill_mngr.input_dev->id.vendor = priv->pci_dev->vendor;
 106         priv->rfkill_mngr.input_dev->dev.parent = device;
 107         priv->rfkill_mngr.input_dev->evbit[0] = BIT(EV_KEY);
 108         set_bit(KEY_WLAN, priv->rfkill_mngr.input_dev->keybit);
 109
 110         ret = rfkill_register(priv->rfkill_mngr.rfkill);
 111         if (ret) {
 112                 IWL_ERROR("Unable to register rfkill: %d\n", ret);
 113                 goto free_input_dev;
 114         }
 115
 116         ret = input_register_device(priv->rfkill_mngr.input_dev);
 117         if (ret) {
 118                 IWL_ERROR("Unable to register rfkill input device: %d\n", ret);
 119                 goto unregister_rfkill;
 120         }
 121
 122         IWL_DEBUG_RF_KILL("RFKILL initialization complete.\n");
 123         return ret;
 124
 125 unregister_rfkill:
 126         rfkill_unregister(priv->rfkill_mngr.rfkill);
 127         priv->rfkill_mngr.rfkill = NULL;
 128
 129 free_input_dev:
 130         input_free_device(priv->rfkill_mngr.input_dev);
 131         priv->rfkill_mngr.input_dev = NULL;
 132
 133 freed_rfkill:
 134         if (priv->rfkill_mngr.rfkill != NULL)
 135                 rfkill_free(priv->rfkill_mngr.rfkill);
 136         priv->rfkill_mngr.rfkill = NULL;
 137
 138 error:
 139         IWL_DEBUG_RF_KILL("RFKILL initialization complete.\n");
 140         return ret;
 141 }
 142 EXPORT_SYMBOL(iwl_rfkill_init);
 143
 144 void iwl_rfkill_unregister(struct iwl_priv *priv)
 145 {
 146
 147         if (priv->rfkill_mngr.input_dev)
 148                 input_unregister_device(priv->rfkill_mngr.input_dev);
 149
 150         if (priv->rfkill_mngr.rfkill)
 151                 rfkill_unregister(priv->rfkill_mngr.rfkill);
 152
 153         priv->rfkill_mngr.input_dev = NULL;
 154         priv->rfkill_mngr.rfkill = NULL;
 155 }
 156 EXPORT_SYMBOL(iwl_rfkill_unregister);
 157
 158 /* set rf-kill to the right state. */
 159 void iwl_rfkill_set_hw_state(struct iwl_priv *priv)
 160 {
 161
 162         if (!priv->rfkill_mngr.rfkill)
 163                 return;
 164
 165         if (!iwl_is_rfkill(priv))
 166                 priv->rfkill_mngr.rfkill->state = RFKILL_STATE_ON;
 167         else
 168                 priv->rfkill_mngr.rfkill->state = RFKILL_STATE_OFF;
 169 }
 170 EXPORT_SYMBOL(iwl_rfkill_set_hw_state);