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 */
36 static 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 */
iwlagn_led_enable(struct iwl_priv * priv)50 void 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 */
iwl_blink_compensation(struct iwl_priv * priv,u8 time,u16 compensation)66 static 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
iwl_send_led_cmd(struct iwl_priv * priv,struct iwl_led_cmd * led_cmd)78 static 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 */
iwl_led_cmd(struct iwl_priv * priv,unsigned long on,unsigned long off)97 static 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
iwl_led_brightness_set(struct led_classdev * led_cdev,enum led_brightness brightness)131 static 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
iwl_led_blink_set(struct led_classdev * led_cdev,unsigned long * delay_on,unsigned long * delay_off)146 static 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
iwl_leds_init(struct iwl_priv * priv)155 void 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
iwl_leds_exit(struct iwl_priv * priv)201 void 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