1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
22 * USA
23 *
24 * The full GNU General Public License is included in this distribution
25 * in the file called COPYING.
26 *
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
30 *
31 * BSD LICENSE
32 *
33 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
34 * All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 *
40 * * Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * * Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in
44 * the documentation and/or other materials provided with the
45 * distribution.
46 * * Neither the name Intel Corporation nor the names of its
47 * contributors may be used to endorse or promote products derived
48 * from this software without specific prior written permission.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
61 *
62 *****************************************************************************/
63
64 #include <linux/leds.h>
65 #include "iwl-io.h"
66 #include "iwl-csr.h"
67 #include "mvm.h"
68
69 /* Set led register on */
iwl_mvm_led_enable(struct iwl_mvm * mvm)70 static void iwl_mvm_led_enable(struct iwl_mvm *mvm)
71 {
72 iwl_write32(mvm->trans, CSR_LED_REG, CSR_LED_REG_TURN_ON);
73 }
74
75 /* Set led register off */
iwl_mvm_led_disable(struct iwl_mvm * mvm)76 static void iwl_mvm_led_disable(struct iwl_mvm *mvm)
77 {
78 iwl_write32(mvm->trans, CSR_LED_REG, CSR_LED_REG_TURN_OFF);
79 }
80
iwl_led_brightness_set(struct led_classdev * led_cdev,enum led_brightness brightness)81 static void iwl_led_brightness_set(struct led_classdev *led_cdev,
82 enum led_brightness brightness)
83 {
84 struct iwl_mvm *mvm = container_of(led_cdev, struct iwl_mvm, led);
85 if (brightness > 0)
86 iwl_mvm_led_enable(mvm);
87 else
88 iwl_mvm_led_disable(mvm);
89 }
90
iwl_mvm_leds_init(struct iwl_mvm * mvm)91 int iwl_mvm_leds_init(struct iwl_mvm *mvm)
92 {
93 int mode = iwlwifi_mod_params.led_mode;
94 int ret;
95
96 switch (mode) {
97 case IWL_LED_DEFAULT:
98 case IWL_LED_RF_STATE:
99 mode = IWL_LED_RF_STATE;
100 break;
101 case IWL_LED_DISABLE:
102 IWL_INFO(mvm, "Led disabled\n");
103 return 0;
104 default:
105 return -EINVAL;
106 };
107
108 mvm->led.name = kasprintf(GFP_KERNEL, "%s-led",
109 wiphy_name(mvm->hw->wiphy));
110 mvm->led.brightness_set = iwl_led_brightness_set;
111 mvm->led.max_brightness = 1;
112
113 if (mode == IWL_LED_RF_STATE)
114 mvm->led.default_trigger =
115 ieee80211_get_radio_led_name(mvm->hw);
116
117 ret = led_classdev_register(mvm->trans->dev, &mvm->led);
118 if (ret) {
119 kfree(mvm->led.name);
120 IWL_INFO(mvm, "Failed to enable led\n");
121 return ret;
122 }
123
124 return 0;
125 }
126
iwl_mvm_leds_exit(struct iwl_mvm * mvm)127 void iwl_mvm_leds_exit(struct iwl_mvm *mvm)
128 {
129 if (iwlwifi_mod_params.led_mode == IWL_LED_DISABLE)
130 return;
131
132 led_classdev_unregister(&mvm->led);
133 kfree(mvm->led.name);
134 }
135