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 } 137