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 */ 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 */ 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 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 */ 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 } 130 131 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 } 145 146 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 } 154 155 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 } 200 201 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