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 */
41 static 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 */
iwlagn_led_enable(struct iwl_priv * priv)55 void 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 */
iwl_blink_compensation(struct iwl_priv * priv,u8 time,u16 compensation)71 static 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
iwl_send_led_cmd(struct iwl_priv * priv,struct iwl_led_cmd * led_cmd)83 static 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 */
iwl_led_cmd(struct iwl_priv * priv,unsigned long on,unsigned long off)102 static 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
iwl_led_brightness_set(struct led_classdev * led_cdev,enum led_brightness brightness)136 static 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
iwl_led_blink_set(struct led_classdev * led_cdev,unsigned long * delay_on,unsigned long * delay_off)151 static 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
iwl_leds_init(struct iwl_priv * priv)160 void 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
iwl_leds_exit(struct iwl_priv * priv)206 void 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