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 == true) || 48 (padapter->bSurpriseRemoved == true)) 49 return; 50 rpwm = val8 | pwrpriv->tog; 51 switch (val8) { 52 case PS_STATE_S1: 53 pwrpriv->cpwm = val8; 54 break; 55 case PS_STATE_S2:/* only for USB normal powersave mode use, 56 * temp mark some code. */ 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 _set_workitem(&(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 _cancel_timer_ex(&padapter->pwrctrlpriv. rpwm_check_timer); 107 _enter_pwrlock(&pwrpriv->lock); 108 pwrpriv->cpwm = (preportpwrstate->state) & 0xf; 109 if (pwrpriv->cpwm >= PS_STATE_S2) { 110 if (pwrpriv->alives & CMD_ALIVE) 111 up(&(pcmdpriv->cmd_queue_sema)); 112 } 113 pwrpriv->cpwm_tog = (preportpwrstate->state) & 0x80; 114 up(&pwrpriv->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 == true || 133 padapter->bSurpriseRemoved == true) 134 return; 135 if (pwrpriv->cpwm != pwrpriv->rpwm) 136 _set_workitem(&(pwrpriv->rpwm_workitem)); 137 } 138 139 static void SetPSModeWorkItemCallback(struct work_struct *work) 140 { 141 struct pwrctrl_priv *pwrpriv = container_of(work, 142 struct pwrctrl_priv, SetPSModeWorkItem); 143 struct _adapter *padapter = container_of(pwrpriv, 144 struct _adapter, pwrctrlpriv); 145 if (!pwrpriv->bSleep) { 146 _enter_pwrlock(&pwrpriv->lock); 147 if (pwrpriv->pwr_mode == PS_MODE_ACTIVE) 148 r8712_set_rpwm(padapter, PS_STATE_S4); 149 up(&pwrpriv->lock); 150 } 151 } 152 153 static void rpwm_workitem_callback(struct work_struct *work) 154 { 155 struct pwrctrl_priv *pwrpriv = container_of(work, 156 struct pwrctrl_priv, rpwm_workitem); 157 struct _adapter *padapter = container_of(pwrpriv, 158 struct _adapter, pwrctrlpriv); 159 u8 cpwm = pwrpriv->cpwm; 160 if (pwrpriv->cpwm != pwrpriv->rpwm) { 161 _enter_pwrlock(&pwrpriv->lock); 162 cpwm = r8712_read8(padapter, SDIO_HCPWM); 163 pwrpriv->rpwm_retry = 1; 164 r8712_set_rpwm(padapter, pwrpriv->rpwm); 165 up(&pwrpriv->lock); 166 } 167 } 168 169 static void rpwm_check_handler (void *FunctionContext) 170 { 171 struct _adapter *adapter = (struct _adapter *)FunctionContext; 172 _rpwm_check_handler(adapter); 173 } 174 175 void r8712_init_pwrctrl_priv(struct _adapter *padapter) 176 { 177 struct pwrctrl_priv *pwrctrlpriv = &padapter->pwrctrlpriv; 178 179 memset((unsigned char *)pwrctrlpriv, 0, sizeof(struct pwrctrl_priv)); 180 sema_init(&pwrctrlpriv->lock, 1); 181 pwrctrlpriv->cpwm = PS_STATE_S4; 182 pwrctrlpriv->pwr_mode = PS_MODE_ACTIVE; 183 pwrctrlpriv->smart_ps = 0; 184 pwrctrlpriv->tog = 0x80; 185 /* clear RPWM to ensure driver and fw back to initial state. */ 186 r8712_write8(padapter, 0x1025FE58, 0); 187 _init_workitem(&(pwrctrlpriv->SetPSModeWorkItem), 188 SetPSModeWorkItemCallback, padapter); 189 _init_workitem(&(pwrctrlpriv->rpwm_workitem), 190 rpwm_workitem_callback, padapter); 191 _init_timer(&(pwrctrlpriv->rpwm_check_timer), 192 padapter->pnetdev, rpwm_check_handler, (u8 *)padapter); 193 } 194 195 /* 196 Caller: r8712_cmd_thread 197 198 Check if the fw_pwrstate is okay for issuing cmd. 199 If not (cpwm should be is less than P2 state), then the sub-routine 200 will raise the cpwm to be greater than or equal to P2. 201 202 Calling Context: Passive 203 204 Return Value: 205 206 _SUCCESS: r8712_cmd_thread can issue cmds to firmware afterwards. 207 _FAIL: r8712_cmd_thread can not do anything. 208 */ 209 sint r8712_register_cmd_alive(struct _adapter *padapter) 210 { 211 uint res = _SUCCESS; 212 struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv; 213 214 _enter_pwrlock(&pwrctrl->lock); 215 register_task_alive(pwrctrl, CMD_ALIVE); 216 if (pwrctrl->cpwm < PS_STATE_S2) { 217 r8712_set_rpwm(padapter, PS_STATE_S3); 218 res = _FAIL; 219 } 220 up(&pwrctrl->lock); 221 return res; 222 } 223 224 /* 225 Caller: ISR 226 227 If ISR's txdone, 228 No more pkts for TX, 229 Then driver shall call this fun. to power down firmware again. 230 */ 231 232 void r8712_unregister_cmd_alive(struct _adapter *padapter) 233 { 234 struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv; 235 236 _enter_pwrlock(&pwrctrl->lock); 237 unregister_task_alive(pwrctrl, CMD_ALIVE); 238 if ((pwrctrl->cpwm > PS_STATE_S2) && 239 (pwrctrl->pwr_mode > PS_MODE_ACTIVE)) { 240 if ((pwrctrl->alives == 0) && 241 (check_fwstate(&padapter->mlmepriv, 242 _FW_UNDER_LINKING) != true)) { 243 r8712_set_rpwm(padapter, PS_STATE_S0); 244 } 245 } 246 up(&pwrctrl->lock); 247 } 248