1 // SPDX-License-Identifier: GPL-2.0
2 /******************************************************************************
3 * rtl871x_pwrctrl.c
4 *
5 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
6 * Linux device driver for RTL8192SU
7 *
8 * Modifications for inclusion into the Linux staging tree are
9 * Copyright(c) 2010 Larry Finger. All rights reserved.
10 *
11 * Contact information:
12 * WLAN FAE <wlanfae@realtek.com>
13 * Larry Finger <Larry.Finger@lwfinger.net>
14 *
15 ******************************************************************************/
16
17 #define _RTL871X_PWRCTRL_C_
18
19 #include "osdep_service.h"
20 #include "drv_types.h"
21 #include "osdep_intf.h"
22
23 #define RTL8712_SDIO_LOCAL_BASE 0X10100000
24 #define SDIO_HCPWM (RTL8712_SDIO_LOCAL_BASE + 0x0081)
25
r8712_set_rpwm(struct _adapter * padapter,u8 val8)26 void r8712_set_rpwm(struct _adapter *padapter, u8 val8)
27 {
28 u8 rpwm;
29 struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
30
31 if (pwrpriv->rpwm == val8) {
32 if (pwrpriv->rpwm_retry == 0)
33 return;
34 }
35 if (padapter->driver_stopped || padapter->surprise_removed)
36 return;
37 rpwm = val8 | pwrpriv->tog;
38 switch (val8) {
39 case PS_STATE_S1:
40 pwrpriv->cpwm = val8;
41 break;
42 case PS_STATE_S2:/* only for USB normal powersave mode use,
43 * temp mark some code.
44 */
45 case PS_STATE_S3:
46 case PS_STATE_S4:
47 pwrpriv->cpwm = val8;
48 break;
49 default:
50 break;
51 }
52 pwrpriv->rpwm_retry = 0;
53 pwrpriv->rpwm = val8;
54 r8712_write8(padapter, 0x1025FE58, rpwm);
55 pwrpriv->tog += 0x80;
56 }
57
r8712_set_ps_mode(struct _adapter * padapter,uint ps_mode,uint smart_ps)58 void r8712_set_ps_mode(struct _adapter *padapter, uint ps_mode, uint smart_ps)
59 {
60 struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
61
62 if (ps_mode > PM_Card_Disable)
63 return;
64 /* if driver is in active state, we dont need set smart_ps.*/
65 if (ps_mode == PS_MODE_ACTIVE)
66 smart_ps = 0;
67 if ((pwrpriv->pwr_mode != ps_mode) || (pwrpriv->smart_ps != smart_ps)) {
68 if (pwrpriv->pwr_mode == PS_MODE_ACTIVE)
69 pwrpriv->bSleep = true;
70 else
71 pwrpriv->bSleep = false;
72 pwrpriv->pwr_mode = ps_mode;
73 pwrpriv->smart_ps = smart_ps;
74 schedule_work(&pwrpriv->SetPSModeWorkItem);
75 }
76 }
77
78 /*
79 * Caller:ISR handler...
80 *
81 * This will be called when CPWM interrupt is up.
82 *
83 * using to update cpwn of drv; and drv will make a decision to up or
84 * down pwr level
85 */
r8712_cpwm_int_hdl(struct _adapter * padapter,struct reportpwrstate_parm * preportpwrstate)86 void r8712_cpwm_int_hdl(struct _adapter *padapter,
87 struct reportpwrstate_parm *preportpwrstate)
88 {
89 struct pwrctrl_priv *pwrpriv = &(padapter->pwrctrlpriv);
90 struct cmd_priv *pcmdpriv = &(padapter->cmdpriv);
91
92 if (pwrpriv->cpwm_tog == ((preportpwrstate->state) & 0x80))
93 return;
94 del_timer(&padapter->pwrctrlpriv.rpwm_check_timer);
95 mutex_lock(&pwrpriv->mutex_lock);
96 pwrpriv->cpwm = (preportpwrstate->state) & 0xf;
97 if (pwrpriv->cpwm >= PS_STATE_S2) {
98 if (pwrpriv->alives & CMD_ALIVE)
99 complete(&(pcmdpriv->cmd_queue_comp));
100 }
101 pwrpriv->cpwm_tog = (preportpwrstate->state) & 0x80;
102 mutex_unlock(&pwrpriv->mutex_lock);
103 }
104
register_task_alive(struct pwrctrl_priv * pwrctrl,uint tag)105 static inline void register_task_alive(struct pwrctrl_priv *pwrctrl, uint tag)
106 {
107 pwrctrl->alives |= tag;
108 }
109
unregister_task_alive(struct pwrctrl_priv * pwrctrl,uint tag)110 static inline void unregister_task_alive(struct pwrctrl_priv *pwrctrl, uint tag)
111 {
112 if (pwrctrl->alives & tag)
113 pwrctrl->alives ^= tag;
114 }
115
_rpwm_check_handler(struct _adapter * padapter)116 static void _rpwm_check_handler (struct _adapter *padapter)
117 {
118 struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
119
120 if (padapter->driver_stopped || padapter->surprise_removed)
121 return;
122 if (pwrpriv->cpwm != pwrpriv->rpwm)
123 schedule_work(&pwrpriv->rpwm_workitem);
124 }
125
SetPSModeWorkItemCallback(struct work_struct * work)126 static void SetPSModeWorkItemCallback(struct work_struct *work)
127 {
128 struct pwrctrl_priv *pwrpriv = container_of(work,
129 struct pwrctrl_priv, SetPSModeWorkItem);
130 struct _adapter *padapter = container_of(pwrpriv,
131 struct _adapter, pwrctrlpriv);
132 if (!pwrpriv->bSleep) {
133 mutex_lock(&pwrpriv->mutex_lock);
134 if (pwrpriv->pwr_mode == PS_MODE_ACTIVE)
135 r8712_set_rpwm(padapter, PS_STATE_S4);
136 mutex_unlock(&pwrpriv->mutex_lock);
137 }
138 }
139
rpwm_workitem_callback(struct work_struct * work)140 static void rpwm_workitem_callback(struct work_struct *work)
141 {
142 struct pwrctrl_priv *pwrpriv = container_of(work,
143 struct pwrctrl_priv, rpwm_workitem);
144 struct _adapter *padapter = container_of(pwrpriv,
145 struct _adapter, pwrctrlpriv);
146 if (pwrpriv->cpwm != pwrpriv->rpwm) {
147 mutex_lock(&pwrpriv->mutex_lock);
148 r8712_read8(padapter, SDIO_HCPWM);
149 pwrpriv->rpwm_retry = 1;
150 r8712_set_rpwm(padapter, pwrpriv->rpwm);
151 mutex_unlock(&pwrpriv->mutex_lock);
152 }
153 }
154
rpwm_check_handler(struct timer_list * t)155 static void rpwm_check_handler (struct timer_list *t)
156 {
157 struct _adapter *adapter =
158 from_timer(adapter, t, pwrctrlpriv.rpwm_check_timer);
159
160 _rpwm_check_handler(adapter);
161 }
162
r8712_init_pwrctrl_priv(struct _adapter * padapter)163 void r8712_init_pwrctrl_priv(struct _adapter *padapter)
164 {
165 struct pwrctrl_priv *pwrctrlpriv = &padapter->pwrctrlpriv;
166
167 memset((unsigned char *)pwrctrlpriv, 0, sizeof(struct pwrctrl_priv));
168 mutex_init(&pwrctrlpriv->mutex_lock);
169 pwrctrlpriv->cpwm = PS_STATE_S4;
170 pwrctrlpriv->pwr_mode = PS_MODE_ACTIVE;
171 pwrctrlpriv->smart_ps = 0;
172 pwrctrlpriv->tog = 0x80;
173 /* clear RPWM to ensure driver and fw back to initial state. */
174 r8712_write8(padapter, 0x1025FE58, 0);
175 INIT_WORK(&pwrctrlpriv->SetPSModeWorkItem, SetPSModeWorkItemCallback);
176 INIT_WORK(&pwrctrlpriv->rpwm_workitem, rpwm_workitem_callback);
177 timer_setup(&pwrctrlpriv->rpwm_check_timer, rpwm_check_handler, 0);
178 }
179
180 /*
181 * Caller: r8712_cmd_thread
182 * Check if the fw_pwrstate is okay for issuing cmd.
183 * If not (cpwm should be is less than P2 state), then the sub-routine
184 * will raise the cpwm to be greater than or equal to P2.
185 * Calling Context: Passive
186 * Return Value:
187 * 0: r8712_cmd_thread can issue cmds to firmware afterwards.
188 * -EINVAL: r8712_cmd_thread can not do anything.
189 */
r8712_register_cmd_alive(struct _adapter * padapter)190 int r8712_register_cmd_alive(struct _adapter *padapter)
191 {
192 int res = 0;
193 struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv;
194
195 mutex_lock(&pwrctrl->mutex_lock);
196 register_task_alive(pwrctrl, CMD_ALIVE);
197 if (pwrctrl->cpwm < PS_STATE_S2) {
198 r8712_set_rpwm(padapter, PS_STATE_S3);
199 res = -EINVAL;
200 }
201 mutex_unlock(&pwrctrl->mutex_lock);
202 return res;
203 }
204
205 /*
206 * Caller: ISR
207 * If ISR's txdone,
208 * No more pkts for TX,
209 * Then driver shall call this fun. to power down firmware again.
210 */
r8712_unregister_cmd_alive(struct _adapter * padapter)211 void r8712_unregister_cmd_alive(struct _adapter *padapter)
212 {
213 struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv;
214
215 mutex_lock(&pwrctrl->mutex_lock);
216 unregister_task_alive(pwrctrl, CMD_ALIVE);
217 if ((pwrctrl->cpwm > PS_STATE_S2) &&
218 (pwrctrl->pwr_mode > PS_MODE_ACTIVE)) {
219 if ((pwrctrl->alives == 0) &&
220 (check_fwstate(&padapter->mlmepriv,
221 _FW_UNDER_LINKING) != true)) {
222 r8712_set_rpwm(padapter, PS_STATE_S0);
223 }
224 }
225 mutex_unlock(&pwrctrl->mutex_lock);
226 }
227
r8712_flush_rwctrl_works(struct _adapter * padapter)228 void r8712_flush_rwctrl_works(struct _adapter *padapter)
229 {
230 struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv;
231
232 flush_work(&pwrctrl->SetPSModeWorkItem);
233 flush_work(&pwrctrl->rpwm_workitem);
234 }
235