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 case PS_STATE_S3: 57 case PS_STATE_S4: 58 pwrpriv->cpwm = val8; 59 break; 60 default: 61 break; 62 } 63 pwrpriv->rpwm_retry = 0; 64 pwrpriv->rpwm = val8; 65 r8712_write8(padapter, 0x1025FE58, rpwm); 66 pwrpriv->tog += 0x80; 67 } 68 69 void r8712_set_ps_mode(struct _adapter *padapter, uint ps_mode, uint smart_ps) 70 { 71 struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv; 72 73 if (ps_mode > PM_Card_Disable) 74 return; 75 /* if driver is in active state, we dont need set smart_ps.*/ 76 if (ps_mode == PS_MODE_ACTIVE) 77 smart_ps = 0; 78 if ((pwrpriv->pwr_mode != ps_mode) || (pwrpriv->smart_ps != smart_ps)) { 79 if (pwrpriv->pwr_mode == PS_MODE_ACTIVE) 80 pwrpriv->bSleep = true; 81 else 82 pwrpriv->bSleep = false; 83 pwrpriv->pwr_mode = ps_mode; 84 pwrpriv->smart_ps = smart_ps; 85 schedule_work(&pwrpriv->SetPSModeWorkItem); 86 } 87 } 88 89 /* 90 * Caller:ISR handler... 91 * 92 * This will be called when CPWM interrupt is up. 93 * 94 * using to update cpwn of drv; and drv will make a decision to up or 95 * down pwr level 96 */ 97 void r8712_cpwm_int_hdl(struct _adapter *padapter, 98 struct reportpwrstate_parm *preportpwrstate) 99 { 100 struct pwrctrl_priv *pwrpriv = &(padapter->pwrctrlpriv); 101 struct cmd_priv *pcmdpriv = &(padapter->cmdpriv); 102 103 if (pwrpriv->cpwm_tog == ((preportpwrstate->state) & 0x80)) 104 return; 105 del_timer(&padapter->pwrctrlpriv.rpwm_check_timer); 106 _enter_pwrlock(&pwrpriv->lock); 107 pwrpriv->cpwm = (preportpwrstate->state) & 0xf; 108 if (pwrpriv->cpwm >= PS_STATE_S2) { 109 if (pwrpriv->alives & CMD_ALIVE) 110 up(&(pcmdpriv->cmd_queue_sema)); 111 } 112 pwrpriv->cpwm_tog = (preportpwrstate->state) & 0x80; 113 up(&pwrpriv->lock); 114 } 115 116 static inline void register_task_alive(struct pwrctrl_priv *pwrctrl, uint tag) 117 { 118 pwrctrl->alives |= tag; 119 } 120 121 static inline void unregister_task_alive(struct pwrctrl_priv *pwrctrl, uint tag) 122 { 123 if (pwrctrl->alives & tag) 124 pwrctrl->alives ^= tag; 125 } 126 127 static void _rpwm_check_handler (struct _adapter *padapter) 128 { 129 struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv; 130 131 if (padapter->bDriverStopped || padapter->bSurpriseRemoved) 132 return; 133 if (pwrpriv->cpwm != pwrpriv->rpwm) 134 schedule_work(&pwrpriv->rpwm_workitem); 135 } 136 137 static void SetPSModeWorkItemCallback(struct work_struct *work) 138 { 139 struct pwrctrl_priv *pwrpriv = container_of(work, 140 struct pwrctrl_priv, SetPSModeWorkItem); 141 struct _adapter *padapter = container_of(pwrpriv, 142 struct _adapter, pwrctrlpriv); 143 if (!pwrpriv->bSleep) { 144 _enter_pwrlock(&pwrpriv->lock); 145 if (pwrpriv->pwr_mode == PS_MODE_ACTIVE) 146 r8712_set_rpwm(padapter, PS_STATE_S4); 147 up(&pwrpriv->lock); 148 } 149 } 150 151 static void rpwm_workitem_callback(struct work_struct *work) 152 { 153 struct pwrctrl_priv *pwrpriv = container_of(work, 154 struct pwrctrl_priv, rpwm_workitem); 155 struct _adapter *padapter = container_of(pwrpriv, 156 struct _adapter, pwrctrlpriv); 157 if (pwrpriv->cpwm != pwrpriv->rpwm) { 158 _enter_pwrlock(&pwrpriv->lock); 159 r8712_read8(padapter, SDIO_HCPWM); 160 pwrpriv->rpwm_retry = 1; 161 r8712_set_rpwm(padapter, pwrpriv->rpwm); 162 up(&pwrpriv->lock); 163 } 164 } 165 166 static void rpwm_check_handler (unsigned long data) 167 { 168 struct _adapter *adapter = (struct _adapter *)data; 169 170 _rpwm_check_handler(adapter); 171 } 172 173 void r8712_init_pwrctrl_priv(struct _adapter *padapter) 174 { 175 struct pwrctrl_priv *pwrctrlpriv = &padapter->pwrctrlpriv; 176 177 memset((unsigned char *)pwrctrlpriv, 0, sizeof(struct pwrctrl_priv)); 178 sema_init(&pwrctrlpriv->lock, 1); 179 pwrctrlpriv->cpwm = PS_STATE_S4; 180 pwrctrlpriv->pwr_mode = PS_MODE_ACTIVE; 181 pwrctrlpriv->smart_ps = 0; 182 pwrctrlpriv->tog = 0x80; 183 /* clear RPWM to ensure driver and fw back to initial state. */ 184 r8712_write8(padapter, 0x1025FE58, 0); 185 INIT_WORK(&pwrctrlpriv->SetPSModeWorkItem, SetPSModeWorkItemCallback); 186 INIT_WORK(&pwrctrlpriv->rpwm_workitem, rpwm_workitem_callback); 187 setup_timer(&pwrctrlpriv->rpwm_check_timer, rpwm_check_handler, 188 (unsigned long)padapter); 189 } 190 191 /* 192 Caller: r8712_cmd_thread 193 194 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. 197 198 Calling Context: Passive 199 200 Return Value: 201 202 _SUCCESS: r8712_cmd_thread can issue cmds to firmware afterwards. 203 _FAIL: r8712_cmd_thread can not do anything. 204 */ 205 sint r8712_register_cmd_alive(struct _adapter *padapter) 206 { 207 uint res = _SUCCESS; 208 struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv; 209 210 _enter_pwrlock(&pwrctrl->lock); 211 register_task_alive(pwrctrl, CMD_ALIVE); 212 if (pwrctrl->cpwm < PS_STATE_S2) { 213 r8712_set_rpwm(padapter, PS_STATE_S3); 214 res = _FAIL; 215 } 216 up(&pwrctrl->lock); 217 return res; 218 } 219 220 /* 221 Caller: ISR 222 223 If ISR's txdone, 224 No more pkts for TX, 225 Then driver shall call this fun. to power down firmware again. 226 */ 227 228 void r8712_unregister_cmd_alive(struct _adapter *padapter) 229 { 230 struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv; 231 232 _enter_pwrlock(&pwrctrl->lock); 233 unregister_task_alive(pwrctrl, CMD_ALIVE); 234 if ((pwrctrl->cpwm > PS_STATE_S2) && 235 (pwrctrl->pwr_mode > PS_MODE_ACTIVE)) { 236 if ((pwrctrl->alives == 0) && 237 (check_fwstate(&padapter->mlmepriv, 238 _FW_UNDER_LINKING) != true)) { 239 r8712_set_rpwm(padapter, PS_STATE_S0); 240 } 241 } 242 up(&pwrctrl->lock); 243 } 244