Merge branch 'release' of git://lm-sensors.org/kernel/mhoffman/hwmon-2.6
[linux-2.6] / 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-dev.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)
48                 return 0;
49
50         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
51                 return 0;
52
53         IWL_DEBUG_RF_KILL("we received soft RFKILL set to state %d\n", state);
54         mutex_lock(&priv->mutex);
55
56         switch (state) {
57         case RFKILL_STATE_UNBLOCKED:
58                 if (iwl_is_rfkill_hw(priv)) {
59                         err = -EBUSY;
60                         goto out_unlock;
61                 }
62                 iwl_radio_kill_sw_enable_radio(priv);
63                 break;
64         case RFKILL_STATE_SOFT_BLOCKED:
65                 iwl_radio_kill_sw_disable_radio(priv);
66                 break;
67         default:
68                 IWL_WARNING("we recieved unexpected RFKILL state %d\n", state);
69                 break;
70         }
71 out_unlock:
72         mutex_unlock(&priv->mutex);
73
74         return err;
75 }
76
77 int iwl_rfkill_init(struct iwl_priv *priv)
78 {
79         struct device *device = wiphy_dev(priv->hw->wiphy);
80         int ret = 0;
81
82         BUG_ON(device == NULL);
83
84         IWL_DEBUG_RF_KILL("Initializing RFKILL.\n");
85         priv->rfkill = rfkill_allocate(device, RFKILL_TYPE_WLAN);
86         if (!priv->rfkill) {
87                 IWL_ERROR("Unable to allocate rfkill device.\n");
88                 ret = -ENOMEM;
89                 goto error;
90         }
91
92         priv->rfkill->name = priv->cfg->name;
93         priv->rfkill->data = priv;
94         priv->rfkill->state = RFKILL_STATE_UNBLOCKED;
95         priv->rfkill->toggle_radio = iwl_rfkill_soft_rf_kill;
96         priv->rfkill->user_claim_unsupported = 1;
97
98         priv->rfkill->dev.class->suspend = NULL;
99         priv->rfkill->dev.class->resume = NULL;
100
101         ret = rfkill_register(priv->rfkill);
102         if (ret) {
103                 IWL_ERROR("Unable to register rfkill: %d\n", ret);
104                 goto free_rfkill;
105         }
106
107         IWL_DEBUG_RF_KILL("RFKILL initialization complete.\n");
108         return ret;
109
110 free_rfkill:
111         if (priv->rfkill != NULL)
112                 rfkill_free(priv->rfkill);
113         priv->rfkill = NULL;
114
115 error:
116         IWL_DEBUG_RF_KILL("RFKILL initialization complete.\n");
117         return ret;
118 }
119 EXPORT_SYMBOL(iwl_rfkill_init);
120
121 void iwl_rfkill_unregister(struct iwl_priv *priv)
122 {
123
124         if (priv->rfkill)
125                 rfkill_unregister(priv->rfkill);
126
127         priv->rfkill = NULL;
128 }
129 EXPORT_SYMBOL(iwl_rfkill_unregister);
130
131 /* set rf-kill to the right state. */
132 void iwl_rfkill_set_hw_state(struct iwl_priv *priv)
133 {
134         if (!priv->rfkill)
135                 return;
136
137         if (iwl_is_rfkill_hw(priv)) {
138                 rfkill_force_state(priv->rfkill, RFKILL_STATE_HARD_BLOCKED);
139                 return;
140         }
141
142         if (!iwl_is_rfkill_sw(priv))
143                 rfkill_force_state(priv->rfkill, RFKILL_STATE_UNBLOCKED);
144         else
145                 rfkill_force_state(priv->rfkill, RFKILL_STATE_SOFT_BLOCKED);
146 }
147 EXPORT_SYMBOL(iwl_rfkill_set_hw_state);