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 } 177