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
 68static 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
 90static 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
102static 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
110int 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	mvm->led.brightness_set = iwl_led_brightness_set;
133	mvm->led.max_brightness = 1;
134
135	if (mode == IWL_LED_RF_STATE)
136		mvm->led.default_trigger =
137			ieee80211_get_radio_led_name(mvm->hw);
138
139	ret = led_classdev_register(mvm->trans->dev, &mvm->led);
140	if (ret) {
141		kfree(mvm->led.name);
142		IWL_INFO(mvm, "Failed to enable led\n");
143		return ret;
144	}
145
146	mvm->init_status |= IWL_MVM_INIT_STATUS_LEDS_INIT_COMPLETE;
147	return 0;
148}
149
150void iwl_mvm_leds_sync(struct iwl_mvm *mvm)
151{
152	if (!(mvm->init_status & IWL_MVM_INIT_STATUS_LEDS_INIT_COMPLETE))
153		return;
154
155	/*
156	 * if we control through the register, we're doing it
157	 * even when the firmware isn't up, so no need to sync
158	 */
159	if (mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_8000)
160		return;
161
162	iwl_mvm_led_set(mvm, mvm->led.brightness > 0);
163}
164
165void iwl_mvm_leds_exit(struct iwl_mvm *mvm)
166{
167	if (!(mvm->init_status & IWL_MVM_INIT_STATUS_LEDS_INIT_COMPLETE))
168		return;
169
170	led_classdev_unregister(&mvm->led);
171	kfree(mvm->led.name);
172	mvm->init_status &= ~IWL_MVM_INIT_STATUS_LEDS_INIT_COMPLETE;
173}