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1// SPDX-License-Identifier: GPL-2.0-only2/******************************************************************************3 *4 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.5 * Copyright (C) 2019 Intel Corporation6 *****************************************************************************/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 <linux/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 2525 * >200 to 300 40 4026 * >100 to 200 55 5527 * >70 to 100 65 6528 * >50 to 70 75 7529 * >20 to 50 85 8530 * >10 to 20 95 9531 * >5 to 10 110 11032 * >1 to 5 130 13033 * >0 to 1 167 16734 * <=0 SOLID ON35 */36static 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 */50void 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 HW57 * Led blink rate analysis showed an average deviation of 20% on 5000 series58 * and up.59 * Need to compensate on the led on/off time per HW according to the deviation60 * to achieve the desired led frequency61 * The calculation is: (100-averageDeviation)/100 * blinkTime62 * For code efficiency the calculation will be:63 * compensation = (100 - averageDeviation) * 64 / 10064 * NewBlinkTime = (compensation * BlinkTime) / 6465 */66static 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 78static 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 */97static 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_INTRVL104 };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 131static 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 else141 off = IWL_LED_SOLID;142 143 iwl_led_cmd(priv, on, off);144}145 146static 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 155void 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 201void 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