1 /****************************************************************************** 2 * rtl871x_pwrctrl.c 3 * 4 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved. 5 * Linux device driver for RTL8192SU 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of version 2 of the GNU General Public License as 9 * published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 14 * more details. 15 * 16 * You should have received a copy of the GNU General Public License along with 17 * this program; if not, write to the Free Software Foundation, Inc., 18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA 19 * 20 * Modifications for inclusion into the Linux staging tree are 21 * Copyright(c) 2010 Larry Finger. All rights reserved. 22 * 23 * Contact information: 24 * WLAN FAE <wlanfae@realtek.com> 25 * Larry Finger <Larry.Finger@lwfinger.net> 26 * 27 ******************************************************************************/ 28 29 #define _RTL871X_PWRCTRL_C_ 30 31 #include "osdep_service.h" 32 #include "drv_types.h" 33 #include "osdep_intf.h" 34 35 #define RTL8712_SDIO_LOCAL_BASE 0X10100000 36 #define SDIO_HCPWM (RTL8712_SDIO_LOCAL_BASE + 0x0081) 37 38 void r8712_set_rpwm(struct _adapter *padapter, u8 val8) 39 { 40 u8 rpwm; 41 struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv; 42 43 if (pwrpriv->rpwm == val8) { 44 if (pwrpriv->rpwm_retry == 0) 45 return; 46 } 47 if (padapter->bDriverStopped || padapter->bSurpriseRemoved) 48 return; 49 rpwm = val8 | pwrpriv->tog; 50 switch (val8) { 51 case PS_STATE_S1: 52 pwrpriv->cpwm = val8; 53 break; 54 case PS_STATE_S2:/* only for USB normal powersave mode use, 55 * temp mark some code. 56 */ 57 case PS_STATE_S3: 58 case PS_STATE_S4: 59 pwrpriv->cpwm = val8; 60 break; 61 default: 62 break; 63 } 64 pwrpriv->rpwm_retry = 0; 65 pwrpriv->rpwm = val8; 66 r8712_write8(padapter, 0x1025FE58, rpwm); 67 pwrpriv->tog += 0x80; 68 } 69 70 void r8712_set_ps_mode(struct _adapter *padapter, uint ps_mode, uint smart_ps) 71 { 72 struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv; 73 74 if (ps_mode > PM_Card_Disable) 75 return; 76 /* if driver is in active state, we dont need set smart_ps.*/ 77 if (ps_mode == PS_MODE_ACTIVE) 78 smart_ps = 0; 79 if ((pwrpriv->pwr_mode != ps_mode) || (pwrpriv->smart_ps != smart_ps)) { 80 if (pwrpriv->pwr_mode == PS_MODE_ACTIVE) 81 pwrpriv->bSleep = true; 82 else 83 pwrpriv->bSleep = false; 84 pwrpriv->pwr_mode = ps_mode; 85 pwrpriv->smart_ps = smart_ps; 86 schedule_work(&pwrpriv->SetPSModeWorkItem); 87 } 88 } 89 90 /* 91 * Caller:ISR handler... 92 * 93 * This will be called when CPWM interrupt is up. 94 * 95 * using to update cpwn of drv; and drv will make a decision to up or 96 * down pwr level 97 */ 98 void r8712_cpwm_int_hdl(struct _adapter *padapter, 99 struct reportpwrstate_parm *preportpwrstate) 100 { 101 struct pwrctrl_priv *pwrpriv = &(padapter->pwrctrlpriv); 102 struct cmd_priv *pcmdpriv = &(padapter->cmdpriv); 103 104 if (pwrpriv->cpwm_tog == ((preportpwrstate->state) & 0x80)) 105 return; 106 del_timer(&padapter->pwrctrlpriv.rpwm_check_timer); 107 mutex_lock(&pwrpriv->mutex_lock); 108 pwrpriv->cpwm = (preportpwrstate->state) & 0xf; 109 if (pwrpriv->cpwm >= PS_STATE_S2) { 110 if (pwrpriv->alives & CMD_ALIVE) 111 complete(&(pcmdpriv->cmd_queue_comp)); 112 } 113 pwrpriv->cpwm_tog = (preportpwrstate->state) & 0x80; 114 mutex_unlock(&pwrpriv->mutex_lock); 115 } 116 117 static inline void register_task_alive(struct pwrctrl_priv *pwrctrl, uint tag) 118 { 119 pwrctrl->alives |= tag; 120 } 121 122 static inline void unregister_task_alive(struct pwrctrl_priv *pwrctrl, uint tag) 123 { 124 if (pwrctrl->alives & tag) 125 pwrctrl->alives ^= tag; 126 } 127 128 static void _rpwm_check_handler (struct _adapter *padapter) 129 { 130 struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv; 131 132 if (padapter->bDriverStopped || padapter->bSurpriseRemoved) 133 return; 134 if (pwrpriv->cpwm != pwrpriv->rpwm) 135 schedule_work(&pwrpriv->rpwm_workitem); 136 } 137 138 static void SetPSModeWorkItemCallback(struct work_struct *work) 139 { 140 struct pwrctrl_priv *pwrpriv = container_of(work, 141 struct pwrctrl_priv, SetPSModeWorkItem); 142 struct _adapter *padapter = container_of(pwrpriv, 143 struct _adapter, pwrctrlpriv); 144 if (!pwrpriv->bSleep) { 145 mutex_lock(&pwrpriv->mutex_lock); 146 if (pwrpriv->pwr_mode == PS_MODE_ACTIVE) 147 r8712_set_rpwm(padapter, PS_STATE_S4); 148 mutex_unlock(&pwrpriv->mutex_lock); 149 } 150 } 151 152 static void rpwm_workitem_callback(struct work_struct *work) 153 { 154 struct pwrctrl_priv *pwrpriv = container_of(work, 155 struct pwrctrl_priv, rpwm_workitem); 156 struct _adapter *padapter = container_of(pwrpriv, 157 struct _adapter, pwrctrlpriv); 158 if (pwrpriv->cpwm != pwrpriv->rpwm) { 159 mutex_lock(&pwrpriv->mutex_lock); 160 r8712_read8(padapter, SDIO_HCPWM); 161 pwrpriv->rpwm_retry = 1; 162 r8712_set_rpwm(padapter, pwrpriv->rpwm); 163 mutex_unlock(&pwrpriv->mutex_lock); 164 } 165 } 166 167 static void rpwm_check_handler (unsigned long data) 168 { 169 struct _adapter *adapter = (struct _adapter *)data; 170 171 _rpwm_check_handler(adapter); 172 } 173 174 void r8712_init_pwrctrl_priv(struct _adapter *padapter) 175 { 176 struct pwrctrl_priv *pwrctrlpriv = &padapter->pwrctrlpriv; 177 178 memset((unsigned char *)pwrctrlpriv, 0, sizeof(struct pwrctrl_priv)); 179 mutex_init(&pwrctrlpriv->mutex_lock); 180 pwrctrlpriv->cpwm = PS_STATE_S4; 181 pwrctrlpriv->pwr_mode = PS_MODE_ACTIVE; 182 pwrctrlpriv->smart_ps = 0; 183 pwrctrlpriv->tog = 0x80; 184 /* clear RPWM to ensure driver and fw back to initial state. */ 185 r8712_write8(padapter, 0x1025FE58, 0); 186 INIT_WORK(&pwrctrlpriv->SetPSModeWorkItem, SetPSModeWorkItemCallback); 187 INIT_WORK(&pwrctrlpriv->rpwm_workitem, rpwm_workitem_callback); 188 setup_timer(&pwrctrlpriv->rpwm_check_timer, rpwm_check_handler, 189 (unsigned long)padapter); 190 } 191 192 /* 193 * Caller: r8712_cmd_thread 194 * Check if the fw_pwrstate is okay for issuing cmd. 195 * If not (cpwm should be is less than P2 state), then the sub-routine 196 * will raise the cpwm to be greater than or equal to P2. 197 * Calling Context: Passive 198 * Return Value: 199 * _SUCCESS: r8712_cmd_thread can issue cmds to firmware afterwards. 200 * _FAIL: r8712_cmd_thread can not do anything. 201 */ 202 sint r8712_register_cmd_alive(struct _adapter *padapter) 203 { 204 uint res = _SUCCESS; 205 struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv; 206 207 mutex_lock(&pwrctrl->mutex_lock); 208 register_task_alive(pwrctrl, CMD_ALIVE); 209 if (pwrctrl->cpwm < PS_STATE_S2) { 210 r8712_set_rpwm(padapter, PS_STATE_S3); 211 res = _FAIL; 212 } 213 mutex_unlock(&pwrctrl->mutex_lock); 214 return res; 215 } 216 217 /* 218 * Caller: ISR 219 * If ISR's txdone, 220 * No more pkts for TX, 221 * Then driver shall call this fun. to power down firmware again. 222 */ 223 void r8712_unregister_cmd_alive(struct _adapter *padapter) 224 { 225 struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv; 226 227 mutex_lock(&pwrctrl->mutex_lock); 228 unregister_task_alive(pwrctrl, CMD_ALIVE); 229 if ((pwrctrl->cpwm > PS_STATE_S2) && 230 (pwrctrl->pwr_mode > PS_MODE_ACTIVE)) { 231 if ((pwrctrl->alives == 0) && 232 (check_fwstate(&padapter->mlmepriv, 233 _FW_UNDER_LINKING) != true)) { 234 r8712_set_rpwm(padapter, PS_STATE_S0); 235 } 236 } 237 mutex_unlock(&pwrctrl->mutex_lock); 238 } 239