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 */ 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 */ 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 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 */ 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 } 135 136 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 } 150 151 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 } 159 160 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 } 205 206 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