drivers/net/wireless/intel/iwlwifi/mvm/led.c

   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 - 2014 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 <linuxwifi@intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
  31  * BSD LICENSE
  32  *
  33  * Copyright(c) 2012 - 2014 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 */
  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 */
  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
  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
  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_BLINK:
  98                 IWL_ERR(mvm, "Blink led mode not supported, used default\n");
  99         case IWL_LED_DEFAULT:
 100         case IWL_LED_RF_STATE:
 101                 mode = IWL_LED_RF_STATE;
 102                 break;
 103         case IWL_LED_DISABLE:
 104                 IWL_INFO(mvm, "Led disabled\n");
 105                 return 0;
 106         default:
 107                 return -EINVAL;
 108         }
 109
 110         mvm->led.name = kasprintf(GFP_KERNEL, "%s-led",
 111                                    wiphy_name(mvm->hw->wiphy));
 112         mvm->led.brightness_set = iwl_led_brightness_set;
 113         mvm->led.max_brightness = 1;
 114
 115         if (mode == IWL_LED_RF_STATE)
 116                 mvm->led.default_trigger =
 117                         ieee80211_get_radio_led_name(mvm->hw);
 118
 119         ret = led_classdev_register(mvm->trans->dev, &mvm->led);
 120         if (ret) {
 121                 kfree(mvm->led.name);
 122                 IWL_INFO(mvm, "Failed to enable led\n");
 123                 return ret;
 124         }
 125
 126         return 0;
 127 }
 128
 129 void iwl_mvm_leds_exit(struct iwl_mvm *mvm)
 130 {
 131         if (iwlwifi_mod_params.led_mode == IWL_LED_DISABLE)
 132                 return;
 133
 134         led_classdev_unregister(&mvm->led);
 135         kfree(mvm->led.name);
 136 }