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 <ilw@linux.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 */
 70static 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 */
 76static 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
 81static 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
 91int 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
129void 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}