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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/* Copyright(c) 2018-2019 Realtek Corporation
*/
#include "main.h"
#include "reg.h"
#include "fw.h"
#include "ps.h"
#include "mac.h"
#include "coex.h"
#include "debug.h"
static int rtw_ips_pwr_up(struct rtw_dev *rtwdev)
{
int ret;
ret = rtw_core_start(rtwdev);
if (ret)
rtw_err(rtwdev, "leave idle state failed\n");
rtw_set_channel(rtwdev);
clear_bit(RTW_FLAG_INACTIVE_PS, rtwdev->flags);
return ret;
}
int rtw_enter_ips(struct rtw_dev *rtwdev)
{
set_bit(RTW_FLAG_INACTIVE_PS, rtwdev->flags);
rtw_coex_ips_notify(rtwdev, COEX_IPS_ENTER);
rtw_core_stop(rtwdev);
rtw_hci_link_ps(rtwdev, true);
return 0;
}
static void rtw_restore_port_cfg_iter(void *data, u8 *mac,
struct ieee80211_vif *vif)
{
struct rtw_dev *rtwdev = data;
struct rtw_vif *rtwvif = (struct rtw_vif *)vif->drv_priv;
u32 config = ~0;
rtw_vif_port_config(rtwdev, rtwvif, config);
}
int rtw_leave_ips(struct rtw_dev *rtwdev)
{
int ret;
rtw_hci_link_ps(rtwdev, false);
ret = rtw_ips_pwr_up(rtwdev);
if (ret) {
rtw_err(rtwdev, "failed to leave ips state\n");
return ret;
}
rtw_iterate_vifs_atomic(rtwdev, rtw_restore_port_cfg_iter, rtwdev);
rtw_coex_ips_notify(rtwdev, COEX_IPS_LEAVE);
return 0;
}
void rtw_power_mode_change(struct rtw_dev *rtwdev, bool enter)
{
u8 request, confirm, polling;
int ret;
request = rtw_read8(rtwdev, rtwdev->hci.rpwm_addr);
confirm = rtw_read8(rtwdev, rtwdev->hci.cpwm_addr);
/* toggle to request power mode, others remain 0 */
request ^= request | BIT_RPWM_TOGGLE;
if (enter) {
request |= POWER_MODE_LCLK;
if (rtw_get_lps_deep_mode(rtwdev) == LPS_DEEP_MODE_PG)
request |= POWER_MODE_PG;
}
/* Each request require an ack from firmware */
request |= POWER_MODE_ACK;
if (rtw_fw_feature_check(&rtwdev->fw, FW_FEATURE_TX_WAKE))
request |= POWER_TX_WAKE;
rtw_write8(rtwdev, rtwdev->hci.rpwm_addr, request);
/* Check firmware get the power requset and ack via cpwm register */
ret = read_poll_timeout_atomic(rtw_read8, polling,
(polling ^ confirm) & BIT_RPWM_TOGGLE,
100, 15000, true, rtwdev,
rtwdev->hci.cpwm_addr);
if (ret) {
/* Hit here means that driver failed to get an ack from firmware.
* The reason could be that hardware is locked at Deep sleep,
* so most of the hardware circuits are not working, even
* register read/write; or firmware is locked in some state and
* cannot get the request. It should be treated as fatal error
* and requires an entire analysis about the firmware/hardware.
*/
WARN(1, "firmware failed to ack driver for %s Deep Power mode\n",
enter ? "entering" : "leaving");
}
}
EXPORT_SYMBOL(rtw_power_mode_change);
static void __rtw_leave_lps_deep(struct rtw_dev *rtwdev)
{
rtw_hci_deep_ps(rtwdev, false);
}
static int __rtw_fw_leave_lps_check_reg(struct rtw_dev *rtwdev)
{
int i;
/* Driver needs to wait for firmware to leave LPS state
* successfully. Firmware will send null packet to inform AP,
* and see if AP sends an ACK back, then firmware will restore
* the REG_TCR register.
*
* If driver does not wait for firmware, null packet with
* PS bit could be sent due to incorrect REG_TCR setting.
*
* In our test, 100ms should be enough for firmware to finish
* the flow. If REG_TCR Register is still incorrect after 100ms,
* just modify it directly, and throw a warn message.
*/
for (i = 0 ; i < LEAVE_LPS_TRY_CNT; i++) {
if (rtw_read32_mask(rtwdev, REG_TCR, BIT_PWRMGT_HWDATA_EN) == 0)
return 0;
msleep(20);
}
return -EBUSY;
}
static int __rtw_fw_leave_lps_check_c2h(struct rtw_dev *rtwdev)
{
if (wait_for_completion_timeout(&rtwdev->lps_leave_check,
LEAVE_LPS_TIMEOUT))
return 0;
return -EBUSY;
}
static void rtw_fw_leave_lps_check(struct rtw_dev *rtwdev)
{
bool ret = false;
struct rtw_fw_state *fw;
if (test_bit(RTW_FLAG_WOWLAN, rtwdev->flags))
fw = &rtwdev->wow_fw;
else
fw = &rtwdev->fw;
if (rtw_fw_feature_check(fw, FW_FEATURE_LPS_C2H))
ret = __rtw_fw_leave_lps_check_c2h(rtwdev);
else
ret = __rtw_fw_leave_lps_check_reg(rtwdev);
if (ret) {
rtw_write32_clr(rtwdev, REG_TCR, BIT_PWRMGT_HWDATA_EN);
rtw_warn(rtwdev, "firmware failed to leave lps state\n");
}
}
static void rtw_fw_leave_lps_check_prepare(struct rtw_dev *rtwdev)
{
struct rtw_fw_state *fw;
if (test_bit(RTW_FLAG_WOWLAN, rtwdev->flags))
fw = &rtwdev->wow_fw;
else
fw = &rtwdev->fw;
if (rtw_fw_feature_check(fw, FW_FEATURE_LPS_C2H))
reinit_completion(&rtwdev->lps_leave_check);
}
static void rtw_leave_lps_core(struct rtw_dev *rtwdev)
{
struct rtw_lps_conf *conf = &rtwdev->lps_conf;
conf->state = RTW_ALL_ON;
conf->awake_interval = 1;
conf->rlbm = 0;
conf->smart_ps = 0;
rtw_hci_link_ps(rtwdev, false);
rtw_fw_leave_lps_check_prepare(rtwdev);
rtw_fw_set_pwr_mode(rtwdev);
rtw_fw_leave_lps_check(rtwdev);
clear_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags);
rtw_coex_lps_notify(rtwdev, COEX_LPS_DISABLE);
}
enum rtw_lps_deep_mode rtw_get_lps_deep_mode(struct rtw_dev *rtwdev)
{
if (test_bit(RTW_FLAG_WOWLAN, rtwdev->flags))
return rtwdev->lps_conf.wow_deep_mode;
else
return rtwdev->lps_conf.deep_mode;
}
static void __rtw_enter_lps_deep(struct rtw_dev *rtwdev)
{
if (rtw_get_lps_deep_mode(rtwdev) == LPS_DEEP_MODE_NONE)
return;
if (!test_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags)) {
rtw_dbg(rtwdev, RTW_DBG_PS,
"Should enter LPS before entering deep PS\n");
return;
}
if (rtw_get_lps_deep_mode(rtwdev) == LPS_DEEP_MODE_PG)
rtw_fw_set_pg_info(rtwdev);
rtw_hci_deep_ps(rtwdev, true);
}
static void rtw_enter_lps_core(struct rtw_dev *rtwdev)
{
struct rtw_lps_conf *conf = &rtwdev->lps_conf;
conf->state = RTW_RF_OFF;
conf->awake_interval = 1;
conf->rlbm = 1;
conf->smart_ps = 2;
rtw_coex_lps_notify(rtwdev, COEX_LPS_ENABLE);
rtw_fw_set_pwr_mode(rtwdev);
rtw_hci_link_ps(rtwdev, true);
set_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags);
}
static void __rtw_enter_lps(struct rtw_dev *rtwdev, u8 port_id)
{
struct rtw_lps_conf *conf = &rtwdev->lps_conf;
if (test_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags))
return;
conf->mode = RTW_MODE_LPS;
conf->port_id = port_id;
rtw_enter_lps_core(rtwdev);
}
static void __rtw_leave_lps(struct rtw_dev *rtwdev)
{
struct rtw_lps_conf *conf = &rtwdev->lps_conf;
if (test_and_clear_bit(RTW_FLAG_LEISURE_PS_DEEP, rtwdev->flags)) {
rtw_dbg(rtwdev, RTW_DBG_PS,
"Should leave deep PS before leaving LPS\n");
__rtw_leave_lps_deep(rtwdev);
}
if (!test_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags))
return;
conf->mode = RTW_MODE_ACTIVE;
rtw_leave_lps_core(rtwdev);
}
void rtw_enter_lps(struct rtw_dev *rtwdev, u8 port_id)
{
lockdep_assert_held(&rtwdev->mutex);
if (rtwdev->coex.stat.wl_force_lps_ctrl)
return;
__rtw_enter_lps(rtwdev, port_id);
__rtw_enter_lps_deep(rtwdev);
}
void rtw_leave_lps(struct rtw_dev *rtwdev)
{
lockdep_assert_held(&rtwdev->mutex);
__rtw_leave_lps_deep(rtwdev);
__rtw_leave_lps(rtwdev);
}
void rtw_leave_lps_deep(struct rtw_dev *rtwdev)
{
lockdep_assert_held(&rtwdev->mutex);
__rtw_leave_lps_deep(rtwdev);
}
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