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  * Copyright(c) 2017        Intel Deutschland GmbH
  10  * Copyright(c) 2018 - 2019 Intel Corporation
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of version 2 of the GNU General Public License as
  14  * published by the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * General Public License for more details.
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called COPYING.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <linuxwifi@intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  * BSD LICENSE
  29  *
  30  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  31  * Copyright(c) 2017        Intel Deutschland GmbH
  32  * Copyright(c) 2018 - 2019 Intel Corporation
  33  * All rights reserved.
  34  *
  35  * Redistribution and use in source and binary forms, with or without
  36  * modification, are permitted provided that the following conditions
  37  * are met:
  38  *
  39  *  * Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  *  * Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in
  43  *    the documentation and/or other materials provided with the
  44  *    distribution.
  45  *  * Neither the name Intel Corporation nor the names of its
  46  *    contributors may be used to endorse or promote products derived
  47  *    from this software without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  50  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  51  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  52  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  53  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  54  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  55  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  56  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  57  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  58  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  59  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  60  *
  61  *****************************************************************************/
  62
  63 #include <linux/leds.h>
  64 #include "iwl-io.h"
  65 #include "iwl-csr.h"
  66 #include "mvm.h"
  67
  68 static void iwl_mvm_send_led_fw_cmd(struct iwl_mvm *mvm, bool on)
  69 {
  70         struct iwl_led_cmd led_cmd = {
  71                 .status = cpu_to_le32(on),
  72         };
  73         struct iwl_host_cmd cmd = {
  74                 .id = WIDE_ID(LONG_GROUP, LEDS_CMD),
  75                 .len = { sizeof(led_cmd), },
  76                 .data = { &led_cmd, },
  77                 .flags = CMD_ASYNC,
  78         };
  79         int err;
  80
  81         if (!iwl_mvm_firmware_running(mvm))
  82                 return;
  83
  84         err = iwl_mvm_send_cmd(mvm, &cmd);
  85
  86         if (err)
  87                 IWL_WARN(mvm, "LED command failed: %d\n", err);
  88 }
  89
  90 static void iwl_mvm_led_set(struct iwl_mvm *mvm, bool on)
  91 {
  92         if (fw_has_capa(&mvm->fw->ucode_capa,
  93                         IWL_UCODE_TLV_CAPA_LED_CMD_SUPPORT)) {
  94                 iwl_mvm_send_led_fw_cmd(mvm, on);
  95                 return;
  96         }
  97
  98         iwl_write32(mvm->trans, CSR_LED_REG,
  99                     on ? CSR_LED_REG_TURN_ON : CSR_LED_REG_TURN_OFF);
 100 }
 101
 102 static void iwl_led_brightness_set(struct led_classdev *led_cdev,
 103                                    enum led_brightness brightness)
 104 {
 105         struct iwl_mvm *mvm = container_of(led_cdev, struct iwl_mvm, led);
 106
 107         iwl_mvm_led_set(mvm, brightness > 0);
 108 }
 109
 110 int iwl_mvm_leds_init(struct iwl_mvm *mvm)
 111 {
 112         int mode = iwlwifi_mod_params.led_mode;
 113         int ret;
 114
 115         switch (mode) {
 116         case IWL_LED_BLINK:
 117                 IWL_ERR(mvm, "Blink led mode not supported, used default\n");
 118                 /* fall through */
 119         case IWL_LED_DEFAULT:
 120         case IWL_LED_RF_STATE:
 121                 mode = IWL_LED_RF_STATE;
 122                 break;
 123         case IWL_LED_DISABLE:
 124                 IWL_INFO(mvm, "Led disabled\n");
 125                 return 0;
 126         default:
 127                 return -EINVAL;
 128         }
 129
 130         mvm->led.name = kasprintf(GFP_KERNEL, "%s-led",
 131                                    wiphy_name(mvm->hw->wiphy));
 132         if (!mvm->led.name)
 133                 return -ENOMEM;
 134
 135         mvm->led.brightness_set = iwl_led_brightness_set;
 136         mvm->led.max_brightness = 1;
 137
 138         if (mode == IWL_LED_RF_STATE)
 139                 mvm->led.default_trigger =
 140                         ieee80211_get_radio_led_name(mvm->hw);
 141
 142         ret = led_classdev_register(mvm->trans->dev, &mvm->led);
 143         if (ret) {
 144                 kfree(mvm->led.name);
 145                 IWL_INFO(mvm, "Failed to enable led\n");
 146                 return ret;
 147         }
 148
 149         mvm->init_status |= IWL_MVM_INIT_STATUS_LEDS_INIT_COMPLETE;
 150         return 0;
 151 }
 152
 153 void iwl_mvm_leds_sync(struct iwl_mvm *mvm)
 154 {
 155         if (!(mvm->init_status & IWL_MVM_INIT_STATUS_LEDS_INIT_COMPLETE))
 156                 return;
 157
 158         /*
 159          * if we control through the register, we're doing it
 160          * even when the firmware isn't up, so no need to sync
 161          */
 162         if (mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_8000)
 163                 return;
 164
 165         iwl_mvm_led_set(mvm, mvm->led.brightness > 0);
 166 }
 167
 168 void iwl_mvm_leds_exit(struct iwl_mvm *mvm)
 169 {
 170         if (!(mvm->init_status & IWL_MVM_INIT_STATUS_LEDS_INIT_COMPLETE))
 171                 return;
 172
 173         led_classdev_unregister(&mvm->led);
 174         kfree(mvm->led.name);
 175         mvm->init_status &= ~IWL_MVM_INIT_STATUS_LEDS_INIT_COMPLETE;
 176 }