Commit f31e039f authored by Chin-Yen Lee's avatar Chin-Yen Lee Committed by Kalle Valo

rtw88: add C2H response for checking firmware leave lps

Originally driver checks if firmware has left lps via reading the setting
of REG_TCR register. But this way may fail when firmware is frequently
changing power state. Therefore, firmware provides a safer option for
driver. When firmware leaves lps successfully, it sends a C2H response
to inform driver.
Signed-off-by: default avatarChin-Yen Lee <timlee@realtek.com>
Signed-off-by: default avatarTzu-En Huang <tehuang@realtek.com>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20201030084826.9034-4-tehuang@realtek.com
parent a9594960
......@@ -183,6 +183,9 @@ void rtw_fw_c2h_cmd_rx_irqsafe(struct rtw_dev *rtwdev, u32 pkt_offset,
case C2H_BT_MP_INFO:
rtw_coex_info_response(rtwdev, skb);
break;
case C2H_WLAN_RFON:
complete(&rtwdev->lps_leave_check);
break;
default:
/* pass offset for further operation */
*((u32 *)skb->cb) = pkt_offset;
......
......@@ -31,6 +31,7 @@ enum rtw_c2h_cmd_id {
C2H_RA_RPT = 0x0c,
C2H_HW_FEATURE_REPORT = 0x19,
C2H_WLAN_INFO = 0x27,
C2H_WLAN_RFON = 0x32,
C2H_HW_FEATURE_DUMP = 0xfd,
C2H_HALMAC = 0xff,
};
......
......@@ -1652,6 +1652,7 @@ int rtw_core_init(struct rtw_dev *rtwdev)
mutex_init(&rtwdev->hal.tx_power_mutex);
init_waitqueue_head(&rtwdev->coex.wait);
init_completion(&rtwdev->lps_leave_check);
rtwdev->sec.total_cam_num = 32;
rtwdev->hal.current_channel = 1;
......
......@@ -1741,6 +1741,7 @@ struct rtw_dev {
/* lps power state & handler work */
struct rtw_lps_conf lps_conf;
bool ps_enabled;
struct completion lps_leave_check;
struct dentry *debugfs;
......
......@@ -109,7 +109,7 @@ static void __rtw_leave_lps_deep(struct rtw_dev *rtwdev)
rtw_hci_deep_ps(rtwdev, false);
}
static void rtw_fw_leave_lps_state_check(struct rtw_dev *rtwdev)
static int __rtw_fw_leave_lps_check_reg(struct rtw_dev *rtwdev)
{
int i;
......@@ -127,12 +127,53 @@ static void rtw_fw_leave_lps_state_check(struct rtw_dev *rtwdev)
*/
for (i = 0 ; i < LEAVE_LPS_TRY_CNT; i++) {
if (rtw_read32_mask(rtwdev, REG_TCR, BIT_PWRMGT_HWDATA_EN) == 0)
return;
return 0;
msleep(20);
}
rtw_write32_mask(rtwdev, REG_TCR, BIT_PWRMGT_HWDATA_EN, 0);
rtw_warn(rtwdev, "firmware failed to restore hardware setting\n");
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 (fw->feature & 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 (fw->feature & FW_FEATURE_LPS_C2H)
reinit_completion(&rtwdev->lps_leave_check);
}
static void rtw_leave_lps_core(struct rtw_dev *rtwdev)
......@@ -145,8 +186,9 @@ static void rtw_leave_lps_core(struct rtw_dev *rtwdev)
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_state_check(rtwdev);
rtw_fw_leave_lps_check(rtwdev);
clear_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags);
......
......@@ -12,6 +12,7 @@
#define POWER_MODE_LCLK BIT(0)
#define LEAVE_LPS_TRY_CNT 5
#define LEAVE_LPS_TIMEOUT msecs_to_jiffies(100)
int rtw_enter_ips(struct rtw_dev *rtwdev);
int rtw_leave_ips(struct rtw_dev *rtwdev);
......
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