[PATCH v4 11/14] wifi: rtlwifi: Add rtl8192du/dm.{c,h}

[Bitterblue Smith <rtl8821cerfe2@gmail.com>]

These contain functions related to the dynamic mechanism, which runs
every two seconds to adjust to changes in the environment.

Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
---
v4:
 - Replace tab with space in rtl8192du/dm.h.
 - Fix dm.h header guard.
 - Delete unused UNDEC_SM_PWDB macro.

v3:
 - No change.

v2:
 - Patch is new in v2, split from patch 3/3 in v1.
---
 .../wireless/realtek/rtlwifi/rtl8192du/dm.c   | 123 ++++++++++++++++++
 .../wireless/realtek/rtlwifi/rtl8192du/dm.h   |  10 ++
 2 files changed, 133 insertions(+)
 create mode 100644 drivers/net/wireless/realtek/rtlwifi/rtl8192du/dm.c
 create mode 100644 drivers/net/wireless/realtek/rtlwifi/rtl8192du/dm.h

diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192du/dm.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192du/dm.c
new file mode 100644
index 000000000000..add909f7726f
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192du/dm.c
@@ -0,0 +1,123 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2009-2012  Realtek Corporation.*/
+
+#include "../wifi.h"
+#include "../base.h"
+#include "../core.h"
+#include "../rtl8192d/reg.h"
+#include "../rtl8192d/def.h"
+#include "../rtl8192d/dm_common.h"
+#include "../rtl8192d/fw_common.h"
+#include "../rtl8192d/phy_common.h"
+#include "phy.h"
+#include "dm.h"
+#include "fw.h"
+
+static void rtl92d_dm_init_1r_cca(struct ieee80211_hw *hw)
+{
+	struct rtl_priv *rtlpriv = rtl_priv(hw);
+	struct ps_t *dm_pstable = &rtlpriv->dm_pstable;
+
+	dm_pstable->pre_ccastate = CCA_MAX;
+	dm_pstable->cur_ccasate = CCA_MAX;
+}
+
+static void rtl92d_dm_1r_cca(struct ieee80211_hw *hw)
+{
+	struct rtl_priv *rtlpriv = rtl_priv(hw);
+	struct ps_t *dm_pstable = &rtlpriv->dm_pstable;
+	struct rtl_hal *rtlhal = rtl_hal(rtlpriv);
+	int pwdb = rtlpriv->dm_digtable.min_undec_pwdb_for_dm;
+
+	if (rtlhal->macphymode != SINGLEMAC_SINGLEPHY ||
+	    rtlhal->current_bandtype != BAND_ON_5G)
+		return;
+
+	if (pwdb != 0) {
+		if (dm_pstable->pre_ccastate == CCA_2R ||
+		    dm_pstable->pre_ccastate == CCA_MAX)
+			dm_pstable->cur_ccasate = (pwdb >= 35) ? CCA_1R : CCA_2R;
+		else
+			dm_pstable->cur_ccasate = (pwdb <= 30) ? CCA_2R : CCA_1R;
+	} else {
+		dm_pstable->cur_ccasate = CCA_MAX;
+	}
+
+	if (dm_pstable->pre_ccastate == dm_pstable->cur_ccasate)
+		return;
+
+	rtl_dbg(rtlpriv, COMP_BB_POWERSAVING, DBG_TRACE,
+		"Old CCA state: %d new CCA state: %d\n",
+		dm_pstable->pre_ccastate, dm_pstable->cur_ccasate);
+
+	if (dm_pstable->cur_ccasate == CCA_1R) {
+		if (rtlpriv->phy.rf_type == RF_2T2R)
+			rtl_set_bbreg(hw, ROFDM0_TRXPATHENABLE, MASKBYTE0, 0x13);
+		else /* Is this branch reachable? */
+			rtl_set_bbreg(hw, ROFDM0_TRXPATHENABLE, MASKBYTE0, 0x23);
+	} else { /* CCA_2R or CCA_MAX */
+		rtl_set_bbreg(hw, ROFDM0_TRXPATHENABLE, MASKBYTE0, 0x33);
+	}
+}
+
+static void rtl92d_dm_pwdb_monitor(struct ieee80211_hw *hw)
+{
+	struct rtl_priv *rtlpriv = rtl_priv(hw);
+	const u32 max_macid = 32;
+	u32 temp;
+
+	/* AP & ADHOC & MESH will return tmp */
+	if (rtlpriv->mac80211.opmode != NL80211_IFTYPE_STATION)
+		return;
+
+	/* Indicate Rx signal strength to FW. */
+	if (rtlpriv->dm.useramask) {
+		temp = rtlpriv->dm.undec_sm_pwdb << 16;
+		temp |= max_macid << 8;
+
+		rtl92d_fill_h2c_cmd(hw, H2C_RSSI_REPORT, 3, (u8 *)(&temp));
+	} else {
+		rtl_write_byte(rtlpriv, 0x4fe, (u8)rtlpriv->dm.undec_sm_pwdb);
+	}
+}
+
+void rtl92du_dm_init(struct ieee80211_hw *hw)
+{
+	struct rtl_priv *rtlpriv = rtl_priv(hw);
+
+	rtlpriv->dm.dm_type = DM_TYPE_BYDRIVER;
+	rtl_dm_diginit(hw, 0x20);
+	rtlpriv->dm_digtable.rx_gain_max = DM_DIG_FA_UPPER;
+	rtlpriv->dm_digtable.rx_gain_min = DM_DIG_FA_LOWER;
+	rtl92d_dm_init_edca_turbo(hw);
+	rtl92d_dm_init_1r_cca(hw);
+	rtl92d_dm_init_rate_adaptive_mask(hw);
+	rtl92d_dm_initialize_txpower_tracking(hw);
+}
+
+void rtl92du_dm_watchdog(struct ieee80211_hw *hw)
+{
+	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
+	bool fw_current_inpsmode = false;
+	bool fwps_awake = true;
+
+	/* 1. RF is OFF. (No need to do DM.)
+	 * 2. Fw is under power saving mode for FwLPS.
+	 *    (Prevent from SW/FW I/O racing.)
+	 * 3. IPS workitem is scheduled. (Prevent from IPS sequence
+	 *    to be swapped with DM.
+	 * 4. RFChangeInProgress is TRUE.
+	 *    (Prevent from broken by IPS/HW/SW Rf off.)
+	 */
+
+	if (ppsc->rfpwr_state == ERFON && !fw_current_inpsmode &&
+	    fwps_awake && !ppsc->rfchange_inprogress) {
+		rtl92d_dm_pwdb_monitor(hw);
+		rtl92d_dm_false_alarm_counter_statistics(hw);
+		rtl92d_dm_find_minimum_rssi(hw);
+		rtl92d_dm_dig(hw);
+		rtl92d_dm_check_txpower_tracking_thermal_meter(hw);
+		rtl92d_dm_check_edca_turbo(hw);
+		rtl92d_dm_1r_cca(hw);
+	}
+}
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192du/dm.h b/drivers/net/wireless/realtek/rtlwifi/rtl8192du/dm.h
new file mode 100644
index 000000000000..1373db2fd87d
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192du/dm.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright(c) 2009-2012  Realtek Corporation.*/
+
+#ifndef __RTL92DU_DM_H__
+#define __RTL92DU_DM_H__
+
+void rtl92du_dm_init(struct ieee80211_hw *hw);
+void rtl92du_dm_watchdog(struct ieee80211_hw *hw);
+
+#endif
-- 
2.44.0