1// SPDX-License-Identifier: GPL-2.0-only
2/******************************************************************************
3 *
4 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
5 * Copyright (C) 2019 Intel Corporation
6 *
7 * Contact Information:
8 *  Intel Linux Wireless <linuxwifi@intel.com>
9 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
10 *
11 *****************************************************************************/
12
13
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/delay.h>
17#include <linux/skbuff.h>
18#include <linux/netdevice.h>
19#include <net/mac80211.h>
20#include <linux/etherdevice.h>
21#include <asm/unaligned.h>
22#include "iwl-io.h"
23#include "iwl-trans.h"
24#include "iwl-modparams.h"
25#include "dev.h"
26#include "agn.h"
27
28/* Throughput		OFF time(ms)	ON time (ms)
29 *	>300			25		25
30 *	>200 to 300		40		40
31 *	>100 to 200		55		55
32 *	>70 to 100		65		65
33 *	>50 to 70		75		75
34 *	>20 to 50		85		85
35 *	>10 to 20		95		95
36 *	>5 to 10		110		110
37 *	>1 to 5			130		130
38 *	>0 to 1			167		167
39 *	<=0					SOLID ON
40 */
41static const struct ieee80211_tpt_blink iwl_blink[] = {
42	{ .throughput = 0, .blink_time = 334 },
43	{ .throughput = 1 * 1024 - 1, .blink_time = 260 },
44	{ .throughput = 5 * 1024 - 1, .blink_time = 220 },
45	{ .throughput = 10 * 1024 - 1, .blink_time = 190 },
46	{ .throughput = 20 * 1024 - 1, .blink_time = 170 },
47	{ .throughput = 50 * 1024 - 1, .blink_time = 150 },
48	{ .throughput = 70 * 1024 - 1, .blink_time = 130 },
49	{ .throughput = 100 * 1024 - 1, .blink_time = 110 },
50	{ .throughput = 200 * 1024 - 1, .blink_time = 80 },
51	{ .throughput = 300 * 1024 - 1, .blink_time = 50 },
52};
53
54/* Set led register off */
55void iwlagn_led_enable(struct iwl_priv *priv)
56{
57	iwl_write32(priv->trans, CSR_LED_REG, CSR_LED_REG_TURN_ON);
58}
59
60/*
61 * Adjust led blink rate to compensate on a MAC Clock difference on every HW
62 * Led blink rate analysis showed an average deviation of 20% on 5000 series
63 * and up.
64 * Need to compensate on the led on/off time per HW according to the deviation
65 * to achieve the desired led frequency
66 * The calculation is: (100-averageDeviation)/100 * blinkTime
67 * For code efficiency the calculation will be:
68 *     compensation = (100 - averageDeviation) * 64 / 100
69 *     NewBlinkTime = (compensation * BlinkTime) / 64
70 */
71static inline u8 iwl_blink_compensation(struct iwl_priv *priv,
72				    u8 time, u16 compensation)
73{
74	if (!compensation) {
75		IWL_ERR(priv, "undefined blink compensation: "
76			"use pre-defined blinking time\n");
77		return time;
78	}
79
80	return (u8)((time * compensation) >> 6);
81}
82
83static int iwl_send_led_cmd(struct iwl_priv *priv, struct iwl_led_cmd *led_cmd)
84{
85	struct iwl_host_cmd cmd = {
86		.id = REPLY_LEDS_CMD,
87		.len = { sizeof(struct iwl_led_cmd), },
88		.data = { led_cmd, },
89		.flags = CMD_ASYNC,
90	};
91	u32 reg;
92
93	reg = iwl_read32(priv->trans, CSR_LED_REG);
94	if (reg != (reg & CSR_LED_BSM_CTRL_MSK))
95		iwl_write32(priv->trans, CSR_LED_REG,
96			    reg & CSR_LED_BSM_CTRL_MSK);
97
98	return iwl_dvm_send_cmd(priv, &cmd);
99}
100
101/* Set led pattern command */
102static int iwl_led_cmd(struct iwl_priv *priv,
103		       unsigned long on,
104		       unsigned long off)
105{
106	struct iwl_led_cmd led_cmd = {
107		.id = IWL_LED_LINK,
108		.interval = IWL_DEF_LED_INTRVL
109	};
110	int ret;
111
112	if (!test_bit(STATUS_READY, &priv->status))
113		return -EBUSY;
114
115	if (priv->blink_on == on && priv->blink_off == off)
116		return 0;
117
118	if (off == 0) {
119		/* led is SOLID_ON */
120		on = IWL_LED_SOLID;
121	}
122
123	led_cmd.on = iwl_blink_compensation(priv, on,
124				priv->trans->trans_cfg->base_params->led_compensation);
125	led_cmd.off = iwl_blink_compensation(priv, off,
126				priv->trans->trans_cfg->base_params->led_compensation);
127
128	ret = iwl_send_led_cmd(priv, &led_cmd);
129	if (!ret) {
130		priv->blink_on = on;
131		priv->blink_off = off;
132	}
133	return ret;
134}
135
136static void iwl_led_brightness_set(struct led_classdev *led_cdev,
137				   enum led_brightness brightness)
138{
139	struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led);
140	unsigned long on = 0;
141	unsigned long off = 0;
142
143	if (brightness > 0)
144		on = IWL_LED_SOLID;
145	else
146		off = IWL_LED_SOLID;
147
148	iwl_led_cmd(priv, on, off);
149}
150
151static int iwl_led_blink_set(struct led_classdev *led_cdev,
152			     unsigned long *delay_on,
153			     unsigned long *delay_off)
154{
155	struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led);
156
157	return iwl_led_cmd(priv, *delay_on, *delay_off);
158}
159
160void iwl_leds_init(struct iwl_priv *priv)
161{
162	int mode = iwlwifi_mod_params.led_mode;
163	int ret;
164
165	if (mode == IWL_LED_DISABLE) {
166		IWL_INFO(priv, "Led disabled\n");
167		return;
168	}
169	if (mode == IWL_LED_DEFAULT)
170		mode = priv->cfg->led_mode;
171
172	priv->led.name = kasprintf(GFP_KERNEL, "%s-led",
173				   wiphy_name(priv->hw->wiphy));
174	if (!priv->led.name)
175		return;
176
177	priv->led.brightness_set = iwl_led_brightness_set;
178	priv->led.blink_set = iwl_led_blink_set;
179	priv->led.max_brightness = 1;
180
181	switch (mode) {
182	case IWL_LED_DEFAULT:
183		WARN_ON(1);
184		break;
185	case IWL_LED_BLINK:
186		priv->led.default_trigger =
187			ieee80211_create_tpt_led_trigger(priv->hw,
188					IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
189					iwl_blink, ARRAY_SIZE(iwl_blink));
190		break;
191	case IWL_LED_RF_STATE:
192		priv->led.default_trigger =
193			ieee80211_get_radio_led_name(priv->hw);
194		break;
195	}
196
197	ret = led_classdev_register(priv->trans->dev, &priv->led);
198	if (ret) {
199		kfree(priv->led.name);
200		return;
201	}
202
203	priv->led_registered = true;
204}
205
206void iwl_leds_exit(struct iwl_priv *priv)
207{
208	if (!priv->led_registered)
209		return;
210
211	led_classdev_unregister(&priv->led);
212	kfree(priv->led.name);
213}
214