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 18 static 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 32 void 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 41 void 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 57 void 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 68 void 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 } 99 100 static 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 } 111 112 void 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 } 126 127 void 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 } 141 142 void 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 } 152 153 void 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 } 170 171 void 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 } 179 180 static bool _rtl92e_ps_set_mode(struct net_device *dev, u8 rtPsMode) 181 { 182 struct r8192_priv *priv = rtllib_priv(dev); 183 184 if (priv->rtllib->iw_mode == IW_MODE_ADHOC) 185 return false; 186 187 if (!priv->ps_force) 188 priv->rtllib->ps = rtPsMode; 189 if (priv->rtllib->sta_sleep != LPS_IS_WAKE && 190 rtPsMode == RTLLIB_PS_DISABLED) { 191 unsigned long flags; 192 193 rtl92e_hw_wakeup(dev); 194 priv->rtllib->sta_sleep = LPS_IS_WAKE; 195 196 spin_lock_irqsave(&(priv->rtllib->mgmt_tx_lock), flags); 197 rtllib_sta_ps_send_null_frame(priv->rtllib, 0); 198 spin_unlock_irqrestore(&(priv->rtllib->mgmt_tx_lock), flags); 199 } 200 201 return true; 202 } 203 204 void rtl92e_leisure_ps_enter(struct net_device *dev) 205 { 206 struct r8192_priv *priv = rtllib_priv(dev); 207 struct rt_pwr_save_ctrl *psc = (struct rt_pwr_save_ctrl *) 208 &priv->rtllib->pwr_save_ctrl; 209 210 if (!((priv->rtllib->iw_mode == IW_MODE_INFRA) && 211 (priv->rtllib->link_state == MAC80211_LINKED)) 212 || (priv->rtllib->iw_mode == IW_MODE_ADHOC)) 213 return; 214 215 if (psc->bLeisurePs) { 216 if (psc->LpsIdleCount >= RT_CHECK_FOR_HANG_PERIOD) { 217 218 if (priv->rtllib->ps == RTLLIB_PS_DISABLED) 219 _rtl92e_ps_set_mode(dev, RTLLIB_PS_MBCAST | RTLLIB_PS_UNICAST); 220 } else { 221 psc->LpsIdleCount++; 222 } 223 } 224 } 225 226 void rtl92e_leisure_ps_leave(struct net_device *dev) 227 { 228 struct r8192_priv *priv = rtllib_priv(dev); 229 struct rt_pwr_save_ctrl *psc = (struct rt_pwr_save_ctrl *) 230 &priv->rtllib->pwr_save_ctrl; 231 232 if (psc->bLeisurePs) { 233 if (priv->rtllib->ps != RTLLIB_PS_DISABLED) 234 _rtl92e_ps_set_mode(dev, RTLLIB_PS_DISABLED); 235 } 236 } 237