[PATCH v2 03/10] rtlwifi: btcoex: 21a 2ant: set wifi standby when halting of entering ips

[Larry Finger]

From: Yan-Hsuan Chuang <yhchu...@realtek.com>

If the wifi is going to halt or entering power saving, set it standby
and allocate resource to bt.

Routine btc8821a2ant_wifi_off_hw_cfg() restored.

Signed-off-by: Yan-Hsuan Chuang <yhchu...@realtek.com>
Signed-off-by: Larry Finger <larry.fin...@lwfinger.net>
Cc: Pkshih <pks...@realtek.com>
Cc: Birming Chiu <birm...@realtek.com>
Cc: Shaofu <sha...@realtek.com>
Cc: Steven Ting <stevent...@realtek.com>
---
v2 - resubmit after removal of BT_AUTO_REPORT_XXXX symbols.
---
 .../realtek/rtlwifi/btcoexist/halbtc8821a2ant.c    | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8821a2ant.c 
b/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8821a2ant.c
index 60386c7571e8..162d40ddf06d 100644
--- a/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8821a2ant.c
+++ b/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8821a2ant.c
@@ -3555,6 +3555,26 @@ static void btc8821a2ant_run_coexist_mechanism(struct 
btc_coexist *btcoexist)
        }
 }
 
+static void btc8821a2ant_wifi_off_hw_cfg(struct btc_coexist *btcoexist)
+{
+       u8 h2c_parameter[2] = {0};
+       u32 fw_ver = 0;
+
+       /* set wlan_act to low */
+       btcoexist->btc_write_1byte(btcoexist, 0x76e, 0x4);
+
+       /* WiFi goto standby while GNT_BT 0-->1 */
+       btcoexist->btc_set_rf_reg(btcoexist, BTC_RF_A, 0x1, 0xfffff, 0x780);
+       btcoexist->btc_get(btcoexist, BTC_GET_U4_WIFI_FW_VER, &fw_ver);
+       if (fw_ver >= 0x180000) {
+               /* Use H2C to set GNT_BT to HIGH */
+               h2c_parameter[0] = 1;
+               btcoexist->btc_fill_h2c(btcoexist, 0x6E, 1, h2c_parameter);
+       } else {
+               btcoexist->btc_write_1byte(btcoexist, 0x765, 0x18);
+       }
+}
+
 /**************************************************************
  * extern function start with ex_btc8821a2ant_
  **************************************************************/
@@ -3841,6 +3861,7 @@ void ex_btc8821a2ant_ips_notify(struct btc_coexist 
*btcoexist, u8 type)
                RT_TRACE(rtlpriv, COMP_BT_COEXIST, DBG_LOUD,
                         "[BTCoex], IPS ENTER notify\n");
                coex_sta->under_ips = true;
+               btc8821a2ant_wifi_off_hw_cfg(btcoexist);
                btc8821a2ant_coex_all_off(btcoexist);
        } else if (BTC_IPS_LEAVE == type) {
                RT_TRACE(rtlpriv, COMP_BT_COEXIST, DBG_LOUD,
@@ -4084,6 +4105,7 @@ void ex_btc8821a2ant_halt_notify(struct btc_coexist 
*btcoexist)
        RT_TRACE(rtlpriv, COMP_BT_COEXIST, DBG_LOUD,
                 "[BTCoex], Halt notify\n");
 
+       btc8821a2ant_wifi_off_hw_cfg(btcoexist);
        btc8821a2ant_ignore_wlan_act(btcoexist, FORCE_EXEC, true);
        ex_btc8821a2ant_media_status_notify(btcoexist, BTC_MEDIA_DISCONNECT);
 }
-- 
2.12.2