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