// SPDX-License-Identifier: GPL-2.0
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/******************************************************************************
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* rtl871x_pwrctrl.c
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*
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* Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
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* Linux device driver for RTL8192SU
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*
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* Modifications for inclusion into the Linux staging tree are
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* Copyright(c) 2010 Larry Finger. All rights reserved.
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*
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* Contact information:
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* WLAN FAE <wlanfae@realtek.com>
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* Larry Finger <Larry.Finger@lwfinger.net>
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*
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******************************************************************************/
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#define _RTL871X_PWRCTRL_C_
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#include "osdep_service.h"
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#include "drv_types.h"
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#include "osdep_intf.h"
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#define RTL8712_SDIO_LOCAL_BASE 0X10100000
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#define SDIO_HCPWM (RTL8712_SDIO_LOCAL_BASE + 0x0081)
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void r8712_set_rpwm(struct _adapter *padapter, u8 val8)
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{
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u8 rpwm;
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struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
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if (pwrpriv->rpwm == val8) {
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if (pwrpriv->rpwm_retry == 0)
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return;
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}
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if (padapter->driver_stopped || padapter->surprise_removed)
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return;
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rpwm = val8 | pwrpriv->tog;
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switch (val8) {
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case PS_STATE_S1:
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pwrpriv->cpwm = val8;
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break;
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case PS_STATE_S2:/* only for USB normal powersave mode use,
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* temp mark some code.
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*/
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case PS_STATE_S3:
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case PS_STATE_S4:
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pwrpriv->cpwm = val8;
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break;
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default:
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break;
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}
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pwrpriv->rpwm_retry = 0;
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pwrpriv->rpwm = val8;
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r8712_write8(padapter, 0x1025FE58, rpwm);
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pwrpriv->tog += 0x80;
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}
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void r8712_set_ps_mode(struct _adapter *padapter, uint ps_mode, uint smart_ps)
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{
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struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
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if (ps_mode > PM_Card_Disable)
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return;
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/* if driver is in active state, we dont need set smart_ps.*/
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if (ps_mode == PS_MODE_ACTIVE)
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smart_ps = 0;
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if ((pwrpriv->pwr_mode != ps_mode) || (pwrpriv->smart_ps != smart_ps)) {
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if (pwrpriv->pwr_mode == PS_MODE_ACTIVE)
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pwrpriv->bSleep = true;
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else
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pwrpriv->bSleep = false;
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pwrpriv->pwr_mode = ps_mode;
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pwrpriv->smart_ps = smart_ps;
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schedule_work(&pwrpriv->SetPSModeWorkItem);
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}
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}
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/*
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* Caller:ISR handler...
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*
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* This will be called when CPWM interrupt is up.
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*
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* using to update cpwn of drv; and drv will make a decision to up or
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* down pwr level
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*/
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void r8712_cpwm_int_hdl(struct _adapter *padapter,
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struct reportpwrstate_parm *preportpwrstate)
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{
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struct pwrctrl_priv *pwrpriv = &(padapter->pwrctrlpriv);
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struct cmd_priv *pcmdpriv = &(padapter->cmdpriv);
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if (pwrpriv->cpwm_tog == ((preportpwrstate->state) & 0x80))
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return;
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del_timer(&padapter->pwrctrlpriv.rpwm_check_timer);
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mutex_lock(&pwrpriv->mutex_lock);
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pwrpriv->cpwm = (preportpwrstate->state) & 0xf;
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if (pwrpriv->cpwm >= PS_STATE_S2) {
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if (pwrpriv->alives & CMD_ALIVE)
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complete(&(pcmdpriv->cmd_queue_comp));
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}
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pwrpriv->cpwm_tog = (preportpwrstate->state) & 0x80;
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mutex_unlock(&pwrpriv->mutex_lock);
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}
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static inline void register_task_alive(struct pwrctrl_priv *pwrctrl, uint tag)
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{
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pwrctrl->alives |= tag;
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}
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static inline void unregister_task_alive(struct pwrctrl_priv *pwrctrl, uint tag)
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{
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if (pwrctrl->alives & tag)
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pwrctrl->alives ^= tag;
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}
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static void _rpwm_check_handler (struct _adapter *padapter)
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{
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struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
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if (padapter->driver_stopped || padapter->surprise_removed)
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return;
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if (pwrpriv->cpwm != pwrpriv->rpwm)
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schedule_work(&pwrpriv->rpwm_workitem);
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}
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static void SetPSModeWorkItemCallback(struct work_struct *work)
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{
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struct pwrctrl_priv *pwrpriv = container_of(work,
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struct pwrctrl_priv, SetPSModeWorkItem);
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struct _adapter *padapter = container_of(pwrpriv,
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struct _adapter, pwrctrlpriv);
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if (!pwrpriv->bSleep) {
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mutex_lock(&pwrpriv->mutex_lock);
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if (pwrpriv->pwr_mode == PS_MODE_ACTIVE)
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r8712_set_rpwm(padapter, PS_STATE_S4);
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mutex_unlock(&pwrpriv->mutex_lock);
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}
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}
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static void rpwm_workitem_callback(struct work_struct *work)
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{
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struct pwrctrl_priv *pwrpriv = container_of(work,
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struct pwrctrl_priv, rpwm_workitem);
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struct _adapter *padapter = container_of(pwrpriv,
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struct _adapter, pwrctrlpriv);
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if (pwrpriv->cpwm != pwrpriv->rpwm) {
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mutex_lock(&pwrpriv->mutex_lock);
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r8712_read8(padapter, SDIO_HCPWM);
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pwrpriv->rpwm_retry = 1;
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r8712_set_rpwm(padapter, pwrpriv->rpwm);
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mutex_unlock(&pwrpriv->mutex_lock);
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}
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}
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static void rpwm_check_handler (struct timer_list *t)
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{
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struct _adapter *adapter =
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from_timer(adapter, t, pwrctrlpriv.rpwm_check_timer);
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_rpwm_check_handler(adapter);
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}
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void r8712_init_pwrctrl_priv(struct _adapter *padapter)
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{
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struct pwrctrl_priv *pwrctrlpriv = &padapter->pwrctrlpriv;
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memset((unsigned char *)pwrctrlpriv, 0, sizeof(struct pwrctrl_priv));
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mutex_init(&pwrctrlpriv->mutex_lock);
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pwrctrlpriv->cpwm = PS_STATE_S4;
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pwrctrlpriv->pwr_mode = PS_MODE_ACTIVE;
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pwrctrlpriv->smart_ps = 0;
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pwrctrlpriv->tog = 0x80;
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/* clear RPWM to ensure driver and fw back to initial state. */
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r8712_write8(padapter, 0x1025FE58, 0);
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INIT_WORK(&pwrctrlpriv->SetPSModeWorkItem, SetPSModeWorkItemCallback);
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INIT_WORK(&pwrctrlpriv->rpwm_workitem, rpwm_workitem_callback);
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timer_setup(&pwrctrlpriv->rpwm_check_timer, rpwm_check_handler, 0);
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}
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/*
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* Caller: r8712_cmd_thread
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* Check if the fw_pwrstate is okay for issuing cmd.
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* If not (cpwm should be is less than P2 state), then the sub-routine
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* will raise the cpwm to be greater than or equal to P2.
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* Calling Context: Passive
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* Return Value:
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* 0: r8712_cmd_thread can issue cmds to firmware afterwards.
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* -EINVAL: r8712_cmd_thread can not do anything.
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*/
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int r8712_register_cmd_alive(struct _adapter *padapter)
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{
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int res = 0;
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struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv;
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mutex_lock(&pwrctrl->mutex_lock);
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register_task_alive(pwrctrl, CMD_ALIVE);
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if (pwrctrl->cpwm < PS_STATE_S2) {
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r8712_set_rpwm(padapter, PS_STATE_S3);
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res = -EINVAL;
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}
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mutex_unlock(&pwrctrl->mutex_lock);
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return res;
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}
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/*
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* Caller: ISR
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* If ISR's txdone,
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* No more pkts for TX,
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* Then driver shall call this fun. to power down firmware again.
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*/
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void r8712_unregister_cmd_alive(struct _adapter *padapter)
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{
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struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv;
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mutex_lock(&pwrctrl->mutex_lock);
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unregister_task_alive(pwrctrl, CMD_ALIVE);
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if ((pwrctrl->cpwm > PS_STATE_S2) &&
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(pwrctrl->pwr_mode > PS_MODE_ACTIVE)) {
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if ((pwrctrl->alives == 0) &&
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(check_fwstate(&padapter->mlmepriv,
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_FW_UNDER_LINKING) != true)) {
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r8712_set_rpwm(padapter, PS_STATE_S0);
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}
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}
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mutex_unlock(&pwrctrl->mutex_lock);
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}
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void r8712_flush_rwctrl_works(struct _adapter *padapter)
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{
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struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv;
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flush_work(&pwrctrl->SetPSModeWorkItem);
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flush_work(&pwrctrl->rpwm_workitem);
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}
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