1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2019 Intel Corporation 4 * Copyright (C) 2017 Intel Deutschland GmbH 5 */ 6 #include <linux/leds.h> 7 #include "iwl-io.h" 8 #include "iwl-csr.h" 9 #include "mvm.h" 10 11 static void iwl_mvm_send_led_fw_cmd(struct iwl_mvm *mvm, bool on) 12 { 13 struct iwl_led_cmd led_cmd = { 14 .status = cpu_to_le32(on), 15 }; 16 struct iwl_host_cmd cmd = { 17 .id = WIDE_ID(LONG_GROUP, LEDS_CMD), 18 .len = { sizeof(led_cmd), }, 19 .data = { &led_cmd, }, 20 .flags = CMD_ASYNC, 21 }; 22 int err; 23 24 if (!iwl_mvm_firmware_running(mvm)) 25 return; 26 27 err = iwl_mvm_send_cmd(mvm, &cmd); 28 29 if (err) 30 IWL_WARN(mvm, "LED command failed: %d\n", err); 31 } 32 33 static void iwl_mvm_led_set(struct iwl_mvm *mvm, bool on) 34 { 35 if (fw_has_capa(&mvm->fw->ucode_capa, 36 IWL_UCODE_TLV_CAPA_LED_CMD_SUPPORT)) { 37 iwl_mvm_send_led_fw_cmd(mvm, on); 38 return; 39 } 40 41 iwl_write32(mvm->trans, CSR_LED_REG, 42 on ? CSR_LED_REG_TURN_ON : CSR_LED_REG_TURN_OFF); 43 } 44 45 static void iwl_led_brightness_set(struct led_classdev *led_cdev, 46 enum led_brightness brightness) 47 { 48 struct iwl_mvm *mvm = container_of(led_cdev, struct iwl_mvm, led); 49 50 iwl_mvm_led_set(mvm, brightness > 0); 51 } 52 53 int iwl_mvm_leds_init(struct iwl_mvm *mvm) 54 { 55 int mode = iwlwifi_mod_params.led_mode; 56 int ret; 57 58 switch (mode) { 59 case IWL_LED_BLINK: 60 IWL_ERR(mvm, "Blink led mode not supported, used default\n"); 61 fallthrough; 62 case IWL_LED_DEFAULT: 63 case IWL_LED_RF_STATE: 64 mode = IWL_LED_RF_STATE; 65 break; 66 case IWL_LED_DISABLE: 67 IWL_INFO(mvm, "Led disabled\n"); 68 return 0; 69 default: 70 return -EINVAL; 71 } 72 73 mvm->led.name = kasprintf(GFP_KERNEL, "%s-led", 74 wiphy_name(mvm->hw->wiphy)); 75 if (!mvm->led.name) 76 return -ENOMEM; 77 78 mvm->led.brightness_set = iwl_led_brightness_set; 79 mvm->led.max_brightness = 1; 80 81 if (mode == IWL_LED_RF_STATE) 82 mvm->led.default_trigger = 83 ieee80211_get_radio_led_name(mvm->hw); 84 85 ret = led_classdev_register(mvm->trans->dev, &mvm->led); 86 if (ret) { 87 kfree(mvm->led.name); 88 IWL_INFO(mvm, "Failed to enable led\n"); 89 return ret; 90 } 91 92 mvm->init_status |= IWL_MVM_INIT_STATUS_LEDS_INIT_COMPLETE; 93 return 0; 94 } 95 96 void iwl_mvm_leds_sync(struct iwl_mvm *mvm) 97 { 98 if (!(mvm->init_status & IWL_MVM_INIT_STATUS_LEDS_INIT_COMPLETE)) 99 return; 100 101 /* 102 * if we control through the register, we're doing it 103 * even when the firmware isn't up, so no need to sync 104 */ 105 if (mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_8000) 106 return; 107 108 iwl_mvm_led_set(mvm, mvm->led.brightness > 0); 109 } 110 111 void iwl_mvm_leds_exit(struct iwl_mvm *mvm) 112 { 113 if (!(mvm->init_status & IWL_MVM_INIT_STATUS_LEDS_INIT_COMPLETE)) 114 return; 115 116 led_classdev_unregister(&mvm->led); 117 kfree(mvm->led.name); 118 mvm->init_status &= ~IWL_MVM_INIT_STATUS_LEDS_INIT_COMPLETE; 119 } 120