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
_rtl92e_hw_sleep(struct net_device * dev)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
rtl92e_hw_sleep_wq(void * data)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
rtl92e_hw_wakeup(struct net_device * dev)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
rtl92e_hw_wakeup_wq(void * data)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
rtl92e_enter_sleep(struct net_device * dev,u64 time)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
_rtl92e_ps_update_rf_state(struct net_device * dev)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
rtl92e_ips_enter(struct net_device * dev)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
rtl92e_ips_leave(struct net_device * dev)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
rtl92e_ips_leave_wq(void * data)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
rtl92e_rtllib_ips_leave_wq(struct net_device * dev)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
rtl92e_rtllib_ips_leave(struct net_device * dev)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
_rtl92e_ps_set_mode(struct net_device * dev,u8 rtPsMode)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
rtl92e_leisure_ps_enter(struct net_device * dev)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
rtl92e_leisure_ps_leave(struct net_device * dev)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