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 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 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 */ 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 } 104 105 static inline void register_task_alive(struct pwrctrl_priv *pwrctrl, uint tag) 106 { 107 pwrctrl->alives |= tag; 108 } 109 110 static inline void unregister_task_alive(struct pwrctrl_priv *pwrctrl, uint tag) 111 { 112 if (pwrctrl->alives & tag) 113 pwrctrl->alives ^= tag; 114 } 115 116 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 } 125 126 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 } 139 140 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 } 154 155 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 } 162 163 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 */ 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 */ 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 } 227 228 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