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 }