1 // SPDX-License-Identifier: GPL-2.0-only 2 /****************************************************************************** 3 * 4 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. 5 * 6 * Contact Information: 7 * Intel Linux Wireless <linuxwifi@intel.com> 8 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 9 * 10 *****************************************************************************/ 11 12 13 #include <linux/kernel.h> 14 #include <linux/module.h> 15 #include <linux/delay.h> 16 #include <linux/skbuff.h> 17 #include <linux/netdevice.h> 18 #include <net/mac80211.h> 19 #include <linux/etherdevice.h> 20 #include <asm/unaligned.h> 21 #include "iwl-io.h" 22 #include "iwl-trans.h" 23 #include "iwl-modparams.h" 24 #include "dev.h" 25 #include "agn.h" 26 27 /* Throughput OFF time(ms) ON time (ms) 28 * >300 25 25 29 * >200 to 300 40 40 30 * >100 to 200 55 55 31 * >70 to 100 65 65 32 * >50 to 70 75 75 33 * >20 to 50 85 85 34 * >10 to 20 95 95 35 * >5 to 10 110 110 36 * >1 to 5 130 130 37 * >0 to 1 167 167 38 * <=0 SOLID ON 39 */ 40 static const struct ieee80211_tpt_blink iwl_blink[] = { 41 { .throughput = 0, .blink_time = 334 }, 42 { .throughput = 1 * 1024 - 1, .blink_time = 260 }, 43 { .throughput = 5 * 1024 - 1, .blink_time = 220 }, 44 { .throughput = 10 * 1024 - 1, .blink_time = 190 }, 45 { .throughput = 20 * 1024 - 1, .blink_time = 170 }, 46 { .throughput = 50 * 1024 - 1, .blink_time = 150 }, 47 { .throughput = 70 * 1024 - 1, .blink_time = 130 }, 48 { .throughput = 100 * 1024 - 1, .blink_time = 110 }, 49 { .throughput = 200 * 1024 - 1, .blink_time = 80 }, 50 { .throughput = 300 * 1024 - 1, .blink_time = 50 }, 51 }; 52 53 /* Set led register off */ 54 void iwlagn_led_enable(struct iwl_priv *priv) 55 { 56 iwl_write32(priv->trans, CSR_LED_REG, CSR_LED_REG_TURN_ON); 57 } 58 59 /* 60 * Adjust led blink rate to compensate on a MAC Clock difference on every HW 61 * Led blink rate analysis showed an average deviation of 20% on 5000 series 62 * and up. 63 * Need to compensate on the led on/off time per HW according to the deviation 64 * to achieve the desired led frequency 65 * The calculation is: (100-averageDeviation)/100 * blinkTime 66 * For code efficiency the calculation will be: 67 * compensation = (100 - averageDeviation) * 64 / 100 68 * NewBlinkTime = (compensation * BlinkTime) / 64 69 */ 70 static inline u8 iwl_blink_compensation(struct iwl_priv *priv, 71 u8 time, u16 compensation) 72 { 73 if (!compensation) { 74 IWL_ERR(priv, "undefined blink compensation: " 75 "use pre-defined blinking time\n"); 76 return time; 77 } 78 79 return (u8)((time * compensation) >> 6); 80 } 81 82 static int iwl_send_led_cmd(struct iwl_priv *priv, struct iwl_led_cmd *led_cmd) 83 { 84 struct iwl_host_cmd cmd = { 85 .id = REPLY_LEDS_CMD, 86 .len = { sizeof(struct iwl_led_cmd), }, 87 .data = { led_cmd, }, 88 .flags = CMD_ASYNC, 89 }; 90 u32 reg; 91 92 reg = iwl_read32(priv->trans, CSR_LED_REG); 93 if (reg != (reg & CSR_LED_BSM_CTRL_MSK)) 94 iwl_write32(priv->trans, CSR_LED_REG, 95 reg & CSR_LED_BSM_CTRL_MSK); 96 97 return iwl_dvm_send_cmd(priv, &cmd); 98 } 99 100 /* Set led pattern command */ 101 static int iwl_led_cmd(struct iwl_priv *priv, 102 unsigned long on, 103 unsigned long off) 104 { 105 struct iwl_led_cmd led_cmd = { 106 .id = IWL_LED_LINK, 107 .interval = IWL_DEF_LED_INTRVL 108 }; 109 int ret; 110 111 if (!test_bit(STATUS_READY, &priv->status)) 112 return -EBUSY; 113 114 if (priv->blink_on == on && priv->blink_off == off) 115 return 0; 116 117 if (off == 0) { 118 /* led is SOLID_ON */ 119 on = IWL_LED_SOLID; 120 } 121 122 led_cmd.on = iwl_blink_compensation(priv, on, 123 priv->cfg->base_params->led_compensation); 124 led_cmd.off = iwl_blink_compensation(priv, off, 125 priv->cfg->base_params->led_compensation); 126 127 ret = iwl_send_led_cmd(priv, &led_cmd); 128 if (!ret) { 129 priv->blink_on = on; 130 priv->blink_off = off; 131 } 132 return ret; 133 } 134 135 static void iwl_led_brightness_set(struct led_classdev *led_cdev, 136 enum led_brightness brightness) 137 { 138 struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led); 139 unsigned long on = 0; 140 unsigned long off = 0; 141 142 if (brightness > 0) 143 on = IWL_LED_SOLID; 144 else 145 off = IWL_LED_SOLID; 146 147 iwl_led_cmd(priv, on, off); 148 } 149 150 static int iwl_led_blink_set(struct led_classdev *led_cdev, 151 unsigned long *delay_on, 152 unsigned long *delay_off) 153 { 154 struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led); 155 156 return iwl_led_cmd(priv, *delay_on, *delay_off); 157 } 158 159 void iwl_leds_init(struct iwl_priv *priv) 160 { 161 int mode = iwlwifi_mod_params.led_mode; 162 int ret; 163 164 if (mode == IWL_LED_DISABLE) { 165 IWL_INFO(priv, "Led disabled\n"); 166 return; 167 } 168 if (mode == IWL_LED_DEFAULT) 169 mode = priv->cfg->led_mode; 170 171 priv->led.name = kasprintf(GFP_KERNEL, "%s-led", 172 wiphy_name(priv->hw->wiphy)); 173 priv->led.brightness_set = iwl_led_brightness_set; 174 priv->led.blink_set = iwl_led_blink_set; 175 priv->led.max_brightness = 1; 176 177 switch (mode) { 178 case IWL_LED_DEFAULT: 179 WARN_ON(1); 180 break; 181 case IWL_LED_BLINK: 182 priv->led.default_trigger = 183 ieee80211_create_tpt_led_trigger(priv->hw, 184 IEEE80211_TPT_LEDTRIG_FL_CONNECTED, 185 iwl_blink, ARRAY_SIZE(iwl_blink)); 186 break; 187 case IWL_LED_RF_STATE: 188 priv->led.default_trigger = 189 ieee80211_get_radio_led_name(priv->hw); 190 break; 191 } 192 193 ret = led_classdev_register(priv->trans->dev, &priv->led); 194 if (ret) { 195 kfree(priv->led.name); 196 return; 197 } 198 199 priv->led_registered = true; 200 } 201 202 void iwl_leds_exit(struct iwl_priv *priv) 203 { 204 if (!priv->led_registered) 205 return; 206 207 led_classdev_unregister(&priv->led); 208 kfree(priv->led.name); 209 } 210