1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Copyright(c) 2008 - 2010 Realtek Corporation. All rights reserved. 4 * 5 * Based on the r8180 driver, which is: 6 * Copyright 2004-2005 Andrea Merello <andrea.merello@gmail.com>, et al. 7 * 8 * Contact Information: wlanfae <wlanfae@realtek.com> 9 */ 10#include "rtl_ps.h" 11#include "rtl_core.h" 12#include "r8192E_phy.h" 13#include "r8192E_phyreg.h" 14#include "r8190P_rtl8256.h" /* RTL8225 Radio frontend */ 15#include "r8192E_cmdpkt.h" 16#include <linux/jiffies.h> 17 18static void _rtl92e_hw_sleep(struct net_device *dev) 19{ 20 struct r8192_priv *priv = rtllib_priv(dev); 21 unsigned long flags = 0; 22 23 spin_lock_irqsave(&priv->rf_ps_lock, flags); 24 if (priv->rf_change_in_progress) { 25 spin_unlock_irqrestore(&priv->rf_ps_lock, flags); 26 return; 27 } 28 spin_unlock_irqrestore(&priv->rf_ps_lock, flags); 29 rtl92e_set_rf_state(dev, rf_sleep, RF_CHANGE_BY_PS); 30} 31 32void rtl92e_hw_sleep_wq(void *data) 33{ 34 struct rtllib_device *ieee = container_of_dwork_rsl(data, 35 struct rtllib_device, hw_sleep_wq); 36 struct net_device *dev = ieee->dev; 37 38 _rtl92e_hw_sleep(dev); 39} 40 41void rtl92e_hw_wakeup(struct net_device *dev) 42{ 43 struct r8192_priv *priv = rtllib_priv(dev); 44 unsigned long flags = 0; 45 46 spin_lock_irqsave(&priv->rf_ps_lock, flags); 47 if (priv->rf_change_in_progress) { 48 spin_unlock_irqrestore(&priv->rf_ps_lock, flags); 49 schedule_delayed_work(&priv->rtllib->hw_wakeup_wq, 50 msecs_to_jiffies(10)); 51 return; 52 } 53 spin_unlock_irqrestore(&priv->rf_ps_lock, flags); 54 rtl92e_set_rf_state(dev, rf_on, RF_CHANGE_BY_PS); 55} 56 57void rtl92e_hw_wakeup_wq(void *data) 58{ 59 struct rtllib_device *ieee = container_of_dwork_rsl(data, 60 struct rtllib_device, hw_wakeup_wq); 61 struct net_device *dev = ieee->dev; 62 63 rtl92e_hw_wakeup(dev); 64} 65 66#define MIN_SLEEP_TIME 50 67#define MAX_SLEEP_TIME 10000 68void rtl92e_enter_sleep(struct net_device *dev, u64 time) 69{ 70 struct r8192_priv *priv = rtllib_priv(dev); 71 72 u32 tmp; 73 unsigned long flags; 74 unsigned long timeout; 75 76 spin_lock_irqsave(&priv->ps_lock, flags); 77 78 time -= msecs_to_jiffies(8 + 16 + 7); 79 80 timeout = jiffies + msecs_to_jiffies(MIN_SLEEP_TIME); 81 if (time_before((unsigned long)time, timeout)) { 82 spin_unlock_irqrestore(&priv->ps_lock, flags); 83 netdev_info(dev, "too short to sleep::%lld < %ld\n", 84 time - jiffies, msecs_to_jiffies(MIN_SLEEP_TIME)); 85 return; 86 } 87 timeout = jiffies + msecs_to_jiffies(MAX_SLEEP_TIME); 88 if (time_after((unsigned long)time, timeout)) { 89 netdev_info(dev, "========>too long to sleep:%lld > %ld\n", 90 time - jiffies, msecs_to_jiffies(MAX_SLEEP_TIME)); 91 spin_unlock_irqrestore(&priv->ps_lock, flags); 92 return; 93 } 94 tmp = time - jiffies; 95 schedule_delayed_work(&priv->rtllib->hw_wakeup_wq, tmp); 96 schedule_delayed_work(&priv->rtllib->hw_sleep_wq, 0); 97 spin_unlock_irqrestore(&priv->ps_lock, flags); 98} 99 100static void _rtl92e_ps_update_rf_state(struct net_device *dev) 101{ 102 struct r8192_priv *priv = rtllib_priv(dev); 103 struct rt_pwr_save_ctrl *psc = (struct rt_pwr_save_ctrl *) 104 &priv->rtllib->pwr_save_ctrl; 105 106 psc->bSwRfProcessing = true; 107 rtl92e_set_rf_state(dev, psc->eInactivePowerState, RF_CHANGE_BY_IPS); 108 109 psc->bSwRfProcessing = false; 110} 111 112void rtl92e_ips_enter(struct net_device *dev) 113{ 114 struct r8192_priv *priv = rtllib_priv(dev); 115 struct rt_pwr_save_ctrl *psc = (struct rt_pwr_save_ctrl *) 116 &priv->rtllib->pwr_save_ctrl; 117 enum rt_rf_power_state rt_state; 118 119 rt_state = priv->rtllib->rf_power_state; 120 if (rt_state == rf_on && !psc->bSwRfProcessing && 121 (priv->rtllib->link_state != MAC80211_LINKED)) { 122 psc->eInactivePowerState = rf_off; 123 _rtl92e_ps_update_rf_state(dev); 124 } 125} 126 127void rtl92e_ips_leave(struct net_device *dev) 128{ 129 struct r8192_priv *priv = rtllib_priv(dev); 130 struct rt_pwr_save_ctrl *psc = (struct rt_pwr_save_ctrl *) 131 &priv->rtllib->pwr_save_ctrl; 132 enum rt_rf_power_state rt_state; 133 134 rt_state = priv->rtllib->rf_power_state; 135 if (rt_state != rf_on && !psc->bSwRfProcessing && 136 priv->rtllib->rf_off_reason <= RF_CHANGE_BY_IPS) { 137 psc->eInactivePowerState = rf_on; 138 _rtl92e_ps_update_rf_state(dev); 139 } 140} 141 142void rtl92e_ips_leave_wq(void *data) 143{ 144 struct rtllib_device *ieee = container_of(data, struct rtllib_device, ips_leave_wq); 145 struct net_device *dev = ieee->dev; 146 struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev); 147 148 mutex_lock(&priv->rtllib->ips_mutex); 149 rtl92e_ips_leave(dev); 150 mutex_unlock(&priv->rtllib->ips_mutex); 151} 152 153void rtl92e_rtllib_ips_leave_wq(struct net_device *dev) 154{ 155 struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev); 156 enum rt_rf_power_state rt_state; 157 158 rt_state = priv->rtllib->rf_power_state; 159 if (rt_state == rf_off) { 160 if (priv->rtllib->rf_off_reason > RF_CHANGE_BY_IPS) { 161 netdev_warn(dev, "%s(): RF is OFF.\n", 162 __func__); 163 return; 164 } 165 netdev_info(dev, "=========>%s(): rtl92e_ips_leave\n", 166 __func__); 167 schedule_work(&priv->rtllib->ips_leave_wq); 168 } 169} 170 171void rtl92e_rtllib_ips_leave(struct net_device *dev) 172{ 173 struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev); 174 175 mutex_lock(&priv->rtllib->ips_mutex); 176 rtl92e_ips_leave(dev); 177 mutex_unlock(&priv->rtllib->ips_mutex); 178} 179 180static bool _rtl92e_ps_set_mode(struct net_device *dev, u8 rtPsMode) 181{ 182 struct r8192_priv *priv = rtllib_priv(dev); 183 184 priv->rtllib->ps = rtPsMode; 185 if (priv->rtllib->sta_sleep != LPS_IS_WAKE && 186 rtPsMode == RTLLIB_PS_DISABLED) { 187 unsigned long flags; 188 189 rtl92e_hw_wakeup(dev); 190 priv->rtllib->sta_sleep = LPS_IS_WAKE; 191 192 spin_lock_irqsave(&(priv->rtllib->mgmt_tx_lock), flags); 193 rtllib_sta_ps_send_null_frame(priv->rtllib, 0); 194 spin_unlock_irqrestore(&(priv->rtllib->mgmt_tx_lock), flags); 195 } 196 197 return true; 198} 199 200void rtl92e_leisure_ps_enter(struct net_device *dev) 201{ 202 struct r8192_priv *priv = rtllib_priv(dev); 203 struct rt_pwr_save_ctrl *psc = (struct rt_pwr_save_ctrl *) 204 &priv->rtllib->pwr_save_ctrl; 205 206 if (!((priv->rtllib->iw_mode == IW_MODE_INFRA) && 207 (priv->rtllib->link_state == MAC80211_LINKED))) 208 return; 209 210 if (psc->bLeisurePs) { 211 if (psc->lps_idle_count >= RT_CHECK_FOR_HANG_PERIOD) { 212 213 if (priv->rtllib->ps == RTLLIB_PS_DISABLED) 214 _rtl92e_ps_set_mode(dev, RTLLIB_PS_MBCAST | RTLLIB_PS_UNICAST); 215 } else { 216 psc->lps_idle_count++; 217 } 218 } 219} 220 221void rtl92e_leisure_ps_leave(struct net_device *dev) 222{ 223 struct r8192_priv *priv = rtllib_priv(dev); 224 struct rt_pwr_save_ctrl *psc = (struct rt_pwr_save_ctrl *) 225 &priv->rtllib->pwr_save_ctrl; 226 227 if (psc->bLeisurePs) { 228 if (priv->rtllib->ps != RTLLIB_PS_DISABLED) 229 _rtl92e_ps_set_mode(dev, RTLLIB_PS_DISABLED); 230 } 231} 232