mt76: mt7915: implement testmode tx support

Support testmode tx for MT7915A, including tx streams and HE rate
settings.
Reviewed-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7915/Makefile

@@ -4,3 +4,5 @@ obj-$(CONFIG_MT7915E) += mt7915e.o
 
 mt7915e-y := pci.o init.o dma.o eeprom.o main.o mcu.o mac.o \
 	     debugfs.o
+
+mt7915e-$(CONFIG_NL80211_TESTMODE) += testmode.o

drivers/net/wireless/mediatek/mt76/mt7915/init.c

@@ -264,6 +264,7 @@ mt7915_init_wiphy(struct ieee80211_hw *hw)
 
 	ieee80211_hw_set(hw, HAS_RATE_CONTROL);
 	ieee80211_hw_set(hw, SUPPORTS_TX_ENCAP_OFFLOAD);
+	ieee80211_hw_set(hw, WANT_MONITOR_VIF);
 
 	hw->max_tx_fragments = 4;
 }
@@ -620,9 +621,6 @@ int mt7915_register_ext_phy(struct mt7915_dev *dev)
 	mphy->hw->wiphy->perm_addr[0] |= 2;
 	mphy->hw->wiphy->perm_addr[0] ^= BIT(7);
 
-	/* The second interface does not get any packets unless it has a vif */
-	ieee80211_hw_set(mphy->hw, WANT_MONITOR_VIF);
-
 	ret = mt76_register_phy(mphy);
 	if (ret)
 		ieee80211_free_hw(mphy->hw);
@@ -678,6 +676,10 @@ int mt7915_register_device(struct mt7915_dev *dev)
 	mt7915_cap_dbdc_disable(dev);
 	dev->phy.dfs_state = -1;
 
+#ifdef CONFIG_NL80211_TESTMODE
+	dev->mt76.test_ops = &mt7915_testmode_ops;
+#endif
+
 	ret = mt76_register_device(&dev->mt76, true, mt7915_rates,
 				   ARRAY_SIZE(mt7915_rates));
 	if (ret)

drivers/net/wireless/mediatek/mt76/mt7915/mac.c

@@ -562,6 +562,108 @@ int mt7915_mac_fill_rx(struct mt7915_dev *dev, struct sk_buff *skb)
 	return 0;
 }
 
+static void
+mt7915_mac_write_txwi_tm(struct mt7915_dev *dev, struct mt76_phy *mphy,
+			 __le32 *txwi, struct sk_buff *skb)
+{
+#ifdef CONFIG_NL80211_TESTMODE
+	struct mt76_testmode_data *td = &dev->mt76.test;
+	u8 rate_idx = td->tx_rate_idx;
+	u8 nss = td->tx_rate_nss;
+	u8 bw, mode;
+	u16 rateval = 0;
+	u32 val;
+
+	if (skb != dev->mt76.test.tx_skb)
+		return;
+
+	switch (td->tx_rate_mode) {
+	case MT76_TM_TX_MODE_CCK:
+		mode = MT_PHY_TYPE_CCK;
+		break;
+	case MT76_TM_TX_MODE_HT:
+		nss = 1 + (rate_idx >> 3);
+		mode = MT_PHY_TYPE_HT;
+		break;
+	case MT76_TM_TX_MODE_VHT:
+		mode = MT_PHY_TYPE_VHT;
+		break;
+	case MT76_TM_TX_MODE_HE_SU:
+		mode = MT_PHY_TYPE_HE_SU;
+		break;
+	case MT76_TM_TX_MODE_HE_EXT_SU:
+		mode = MT_PHY_TYPE_HE_EXT_SU;
+		break;
+	case MT76_TM_TX_MODE_HE_TB:
+		mode = MT_PHY_TYPE_HE_TB;
+		break;
+	case MT76_TM_TX_MODE_HE_MU:
+		mode = MT_PHY_TYPE_HE_MU;
+		break;
+	case MT76_TM_TX_MODE_OFDM:
+	default:
+		mode = MT_PHY_TYPE_OFDM;
+		break;
+	}
+
+	switch (mphy->chandef.width) {
+	case NL80211_CHAN_WIDTH_40:
+		bw = 1;
+		break;
+	case NL80211_CHAN_WIDTH_80:
+		bw = 2;
+		break;
+	case NL80211_CHAN_WIDTH_80P80:
+	case NL80211_CHAN_WIDTH_160:
+		bw = 3;
+		break;
+	default:
+		bw = 0;
+		break;
+	}
+
+	if (td->tx_rate_stbc && nss == 1) {
+		nss++;
+		rateval |= MT_TX_RATE_STBC;
+	}
+
+	rateval |= FIELD_PREP(MT_TX_RATE_IDX, rate_idx) |
+		   FIELD_PREP(MT_TX_RATE_MODE, mode) |
+		   FIELD_PREP(MT_TX_RATE_NSS, nss - 1);
+
+	txwi[2] |= cpu_to_le32(MT_TXD2_FIX_RATE);
+
+	le32p_replace_bits(&txwi[3], 1, MT_TXD3_REM_TX_COUNT);
+	if (td->tx_rate_mode < MT76_TM_TX_MODE_HT)
+		txwi[3] |= cpu_to_le32(MT_TXD3_BA_DISABLE);
+
+	val = MT_TXD6_FIXED_BW |
+	      FIELD_PREP(MT_TXD6_BW, bw) |
+	      FIELD_PREP(MT_TXD6_TX_RATE, rateval) |
+	      FIELD_PREP(MT_TXD6_SGI, td->tx_rate_sgi);
+
+	/* for HE_SU/HE_EXT_SU PPDU
+	 * - 1x, 2x, 4x LTF + 0.8us GI
+	 * - 2x LTF + 1.6us GI, 4x LTF + 3.2us GI
+	 * for HE_MU PPDU
+	 * - 2x, 4x LTF + 0.8us GI
+	 * - 2x LTF + 1.6us GI, 4x LTF + 3.2us GI
+	 * for HE_TB PPDU
+	 * - 1x, 2x LTF + 1.6us GI
+	 * - 4x LTF + 3.2us GI
+	 */
+	if (mode >= MT_PHY_TYPE_HE_SU)
+		val |= FIELD_PREP(MT_TXD6_HELTF, td->tx_ltf);
+
+	if (td->tx_rate_ldpc)
+		val |= MT_TXD6_LDPC;
+
+	txwi[6] |= cpu_to_le32(val);
+	txwi[7] |= cpu_to_le32(FIELD_PREP(MT_TXD7_SPE_IDX,
+					  dev->test.spe_idx));
+#endif
+}
+
 static void
 mt7915_mac_write_txwi_8023(struct mt7915_dev *dev, __le32 *txwi,
 			   struct sk_buff *skb, struct mt76_wcid *wcid)
@@ -761,6 +863,9 @@ void mt7915_mac_write_txwi(struct mt7915_dev *dev, __le32 *txwi,
 		txwi[6] |= cpu_to_le32(val);
 		txwi[3] |= cpu_to_le32(MT_TXD3_BA_DISABLE);
 	}
+
+	if (mt76_testmode_enabled(&dev->mt76))
+		mt7915_mac_write_txwi_tm(dev, mphy, txwi, skb);
 }
 
 int mt7915_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
@@ -881,6 +986,18 @@ mt7915_tx_complete_status(struct mt76_dev *mdev, struct sk_buff *skb,
 
 	hw = mt76_tx_status_get_hw(mdev, skb);
 
+#ifdef CONFIG_NL80211_TESTMODE
+	if (skb == mdev->test.tx_skb) {
+		struct mt7915_phy *phy = mt7915_hw_phy(hw);
+		struct ieee80211_vif *vif = phy->monitor_vif;
+		struct mt7915_vif *mvif = (struct mt7915_vif *)vif->drv_priv;
+
+		mt76_tx_complete_skb(mdev, mvif->sta.wcid.idx, skb);
+
+		return;
+	}
+#endif
+
 	if (info->flags & IEEE80211_TX_CTL_AMPDU)
 		info->flags |= IEEE80211_TX_STAT_AMPDU;
 

drivers/net/wireless/mediatek/mt76/mt7915/main.c

@@ -44,11 +44,12 @@ static int mt7915_start(struct ieee80211_hw *hw)
 		mt7915_mac_enable_nf(dev, 1);
 	}
 
-	mt7915_mcu_set_sku_en(phy, true);
+	mt7915_mcu_set_sku_en(phy, !mt76_testmode_enabled(&dev->mt76));
 	mt7915_mcu_set_chan_info(phy, MCU_EXT_CMD_SET_RX_PATH);
 
 	set_bit(MT76_STATE_RUNNING, &phy->mt76->state);
 
+	if (!mt76_testmode_enabled(&dev->mt76))
 		ieee80211_queue_delayed_work(hw, &phy->mac_work,
 					     MT7915_WATCHDOG_TIME);
 
@@ -69,6 +70,8 @@ static void mt7915_stop(struct ieee80211_hw *hw)
 
 	mutex_lock(&dev->mt76.mutex);
 
+	mt76_testmode_reset(&dev->mt76, true);
+
 	clear_bit(MT76_STATE_RUNNING, &phy->mt76->state);
 
 	if (phy != &dev->phy) {
@@ -150,6 +153,12 @@ static int mt7915_add_interface(struct ieee80211_hw *hw,
 
 	mutex_lock(&dev->mt76.mutex);
 
+	mt76_testmode_reset(&dev->mt76, true);
+
+	if (vif->type == NL80211_IFTYPE_MONITOR &&
+	    is_zero_ether_addr(vif->addr))
+		phy->monitor_vif = vif;
+
 	mvif->idx = ffs(~phy->mt76->vif_mask) - 1;
 	if (mvif->idx >= MT7915_MAX_INTERFACES) {
 		ret = -ENOSPC;
@@ -218,6 +227,13 @@ static void mt7915_remove_interface(struct ieee80211_hw *hw,
 
 	/* TODO: disable beacon for the bss */
 
+	mutex_lock(&dev->mt76.mutex);
+	mt76_testmode_reset(&dev->mt76, true);
+	mutex_unlock(&dev->mt76.mutex);
+
+	if (vif == phy->monitor_vif)
+		phy->monitor_vif = NULL;
+
 	mt7915_mcu_add_dev_info(phy, vif, false);
 
 	rcu_assign_pointer(dev->mt76.wcid[idx], NULL);
@@ -252,7 +268,7 @@ static void mt7915_init_dfs_state(struct mt7915_phy *phy)
 	phy->dfs_state = -1;
 }
 
-static int mt7915_set_channel(struct mt7915_phy *phy)
+int mt7915_set_channel(struct mt7915_phy *phy)
 {
 	struct mt7915_dev *dev = phy->dev;
 	int ret;
@@ -281,6 +297,8 @@ static int mt7915_set_channel(struct mt7915_phy *phy)
 	mutex_unlock(&dev->mt76.mutex);
 
 	mt76_txq_schedule_all(phy->mt76);
+
+	if (!mt76_testmode_enabled(&dev->mt76))
 		ieee80211_queue_delayed_work(phy->mt76->hw, &phy->mac_work,
 					     MT7915_WATCHDOG_TIME);
 
@@ -346,6 +364,13 @@ static int mt7915_config(struct ieee80211_hw *hw, u32 changed)
 	int ret;
 
 	if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
+#ifdef CONFIG_NL80211_TESTMODE
+		if (dev->mt76.test.state != MT76_TM_STATE_OFF) {
+			mutex_lock(&dev->mt76.mutex);
+			mt76_testmode_reset(&dev->mt76, false);
+			mutex_unlock(&dev->mt76.mutex);
+		}
+#endif
 		ieee80211_stop_queues(hw);
 		ret = mt7915_set_channel(phy);
 		if (ret)
@@ -370,6 +395,7 @@ static int mt7915_config(struct ieee80211_hw *hw, u32 changed)
 			phy->rxfilter &= ~MT_WF_RFCR_DROP_OTHER_UC;
 
 		mt76_rmw_field(dev, MT_DMA_DCR0, MT_DMA_DCR0_RXD_G5_EN, enabled);
+		mt76_testmode_reset(&dev->mt76, true);
 		mt76_wr(dev, MT_WF_RFCR(band), phy->rxfilter);
 	}
 
@@ -887,6 +913,8 @@ const struct ieee80211_ops mt7915_ops = {
 	.set_coverage_class = mt7915_set_coverage_class,
 	.sta_statistics = mt7915_sta_statistics,
 	.sta_set_4addr = mt7915_sta_set_4addr,
+	CFG80211_TESTMODE_CMD(mt76_testmode_cmd)
+	CFG80211_TESTMODE_DUMP(mt76_testmode_dump)
 #ifdef CONFIG_MAC80211_DEBUGFS
 	.sta_add_debugfs = mt7915_sta_add_debugfs,
 #endif

drivers/net/wireless/mediatek/mt76/mt7915/mcu.c

@@ -3166,6 +3166,15 @@ int mt7915_mcu_set_chan_info(struct mt7915_phy *phy, int cmd)
 		.channel_band = chandef->chan->band,
 	};
 
+#ifdef CONFIG_NL80211_TESTMODE
+	if (dev->mt76.test.tx_antenna_mask &&
+	    (dev->mt76.test.state == MT76_TM_STATE_TX_FRAMES ||
+	     dev->mt76.test.state == MT76_TM_STATE_RX_FRAMES)) {
+		req.tx_streams_num = fls(dev->mt76.test.tx_antenna_mask);
+		req.rx_streams = dev->mt76.test.tx_antenna_mask;
+	}
+#endif
+
 	if (dev->mt76.hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
 		req.switch_reason = CH_SWITCH_SCAN_BYPASS_DPD;
 	else if ((chandef->chan->flags & IEEE80211_CHAN_RADAR) &&
@@ -3287,6 +3296,28 @@ int mt7915_mcu_set_sku(struct mt7915_phy *phy)
 				 sizeof(req), true);
 }
 
+int mt7915_mcu_set_test_param(struct mt7915_dev *dev, u8 param, bool test_mode,
+			      u8 en)
+{
+	struct {
+		u8 test_mode_en;
+		u8 param_idx;
+		u8 _rsv[2];
+
+		u8 enable;
+		u8 _rsv2[3];
+
+		u8 pad[8];
+	} __packed req = {
+		.test_mode_en = test_mode,
+		.param_idx = param,
+		.enable = en,
+	};
+
+	return mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD_ATE_CTRL, &req,
+				 sizeof(req), false);
+}
+
 int mt7915_mcu_set_sku_en(struct mt7915_phy *phy, bool enable)
 {
 	struct mt7915_dev *dev = phy->dev;

drivers/net/wireless/mediatek/mt76/mt7915/mcu.h

@@ -46,6 +46,10 @@ enum {
 	MCU_EXT_EVENT_RATE_REPORT = 0x87,
 };
 
+enum {
+	MCU_ATE_SET_TRX = 0x1,
+};
+
 struct mt7915_mcu_rxd {
 	__le32 rxd[6];
 
@@ -216,6 +220,7 @@ enum {
 	MCU_EXT_CMD_WTBL_UPDATE = 0x32,
 	MCU_EXT_CMD_SET_DRR_CTRL = 0x36,
 	MCU_EXT_CMD_SET_RDD_CTRL = 0x3a,
+	MCU_EXT_CMD_ATE_CTRL = 0x3d,
 	MCU_EXT_CMD_PROTECT_CTRL = 0x3e,
 	MCU_EXT_CMD_MAC_INIT_CTRL = 0x46,
 	MCU_EXT_CMD_RX_HDR_TRANS = 0x47,

drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h

@@ -112,6 +112,8 @@ struct mt7915_phy {
 
 	struct ieee80211_sband_iftype_data iftype[2][NUM_NL80211_IFTYPES];
 
+	struct ieee80211_vif *monitor_vif;
+
 	u32 rxfilter;
 	u64 omac_mask;
 
@@ -164,6 +166,14 @@ struct mt7915_dev {
 	s8 **rate_power; /* TODO: use mt76_rate_power */
 
 	bool fw_debug;
+
+#ifdef CONFIG_NL80211_TESTMODE
+	struct {
+		u32 *reg_backup;
+
+		u8 spe_idx;
+	} test;
+#endif
 };
 
 enum {
@@ -253,6 +263,7 @@ static inline u8 mt7915_lmac_mapping(struct mt7915_dev *dev, u8 ac)
 
 extern const struct ieee80211_ops mt7915_ops;
 extern struct pci_driver mt7915_pci_driver;
+extern const struct mt76_testmode_ops mt7915_testmode_ops;
 
 u32 mt7915_reg_map(struct mt7915_dev *dev, u32 addr);
 
@@ -298,6 +309,7 @@ int mt7915_mcu_add_rate_ctrl(struct mt7915_dev *dev, struct ieee80211_vif *vif,
 			     struct ieee80211_sta *sta);
 int mt7915_mcu_add_smps(struct mt7915_dev *dev, struct ieee80211_vif *vif,
 			struct ieee80211_sta *sta);
+int mt7915_set_channel(struct mt7915_phy *phy);
 int mt7915_mcu_set_chan_info(struct mt7915_phy *phy, int cmd);
 int mt7915_mcu_set_tx(struct mt7915_dev *dev, struct ieee80211_vif *vif);
 int mt7915_mcu_set_fixed_rate(struct mt7915_dev *dev,
@@ -306,6 +318,8 @@ int mt7915_mcu_set_eeprom(struct mt7915_dev *dev);
 int mt7915_mcu_get_eeprom(struct mt7915_dev *dev, u32 offset);
 int mt7915_mcu_set_mac(struct mt7915_dev *dev, int band, bool enable,
 		       bool hdr_trans);
+int mt7915_mcu_set_test_param(struct mt7915_dev *dev, u8 param, bool test_mode,
+			      u8 en);
 int mt7915_mcu_set_scs(struct mt7915_dev *dev, u8 band, bool enable);
 int mt7915_mcu_set_ser(struct mt7915_dev *dev, u8 action, u8 set, u8 band);
 int mt7915_mcu_set_rts_thresh(struct mt7915_phy *phy, u32 val);

drivers/net/wireless/mediatek/mt76/mt7915/regs.h

@@ -51,6 +51,9 @@
 #define MT_WF_TMAC_BASE(_band)		((_band) ? 0xa1000 : 0x21000)
 #define MT_WF_TMAC(_band, ofs)		(MT_WF_TMAC_BASE(_band) + (ofs))
 
+#define MT_TMAC_TCR0(_band)		MT_WF_TMAC(_band, 0)
+#define MT_TMAC_TCR0_TBTT_STOP_CTRL	BIT(25)
+
 #define MT_TMAC_CDTR(_band)		MT_WF_TMAC(_band, 0x090)
 #define MT_TMAC_ODTR(_band)		MT_WF_TMAC(_band, 0x094)
 #define MT_TIMEOUT_VAL_PLCP		GENMASK(15, 0)
@@ -67,6 +70,9 @@
 #define MT_TMAC_CTCR0_INS_DDLMT_EN		BIT(17)
 #define MT_TMAC_CTCR0_INS_DDLMT_VHT_SMPDU_EN	BIT(18)
 
+#define MT_TMAC_TRCR0(_band)		MT_WF_TMAC(_band, 0x09c)
+#define MT_TMAC_TFCR0(_band)		MT_WF_TMAC(_band, 0x1e0)
+
 /* DMA Band 0 */
 #define MT_WF_DMA_BASE			0x21e00
 #define MT_WF_DMA(ofs)			(MT_WF_DMA_BASE + (ofs))
@@ -166,10 +172,33 @@
 #define MT_WF_AGG_BASE(_band)		((_band) ? 0xa0800 : 0x20800)
 #define MT_WF_AGG(_band, ofs)		(MT_WF_AGG_BASE(_band) + (ofs))
 
+#define MT_AGG_AWSCR0(_band, _n)	MT_WF_AGG(_band, 0x05c + (_n) * 4)
+#define MT_AGG_PCR0(_band, _n)		MT_WF_AGG(_band, 0x06c + (_n) * 4)
+#define MT_AGG_PCR0_MM_PROT		BIT(0)
+#define MT_AGG_PCR0_GF_PROT		BIT(1)
+#define MT_AGG_PCR0_BW20_PROT		BIT(2)
+#define MT_AGG_PCR0_BW40_PROT		BIT(4)
+#define MT_AGG_PCR0_BW80_PROT		BIT(6)
+#define MT_AGG_PCR0_ERP_PROT		GENMASK(12, 8)
+#define MT_AGG_PCR0_VHT_PROT		BIT(13)
+#define MT_AGG_PCR0_PTA_WIN_DIS		BIT(15)
+
+#define MT_AGG_PCR1_RTS0_NUM_THRES	GENMASK(31, 23)
+#define MT_AGG_PCR1_RTS0_LEN_THRES	GENMASK(19, 0)
+
 #define MT_AGG_ACR0(_band)		MT_WF_AGG(_band, 0x084)
 #define MT_AGG_ACR_CFEND_RATE		GENMASK(13, 0)
 #define MT_AGG_ACR_BAR_RATE		GENMASK(29, 16)
 
+#define MT_AGG_MRCR(_band)		MT_WF_AGG(_band, 0x098)
+#define MT_AGG_MRCR_BAR_CNT_LIMIT	GENMASK(15, 12)
+#define MT_AGG_MRCR_LAST_RTS_CTS_RN	BIT(6)
+#define MT_AGG_MRCR_RTS_FAIL_LIMIT	GENMASK(11, 7)
+#define MT_AGG_MRCR_TXCMD_RTS_FAIL_LIMIT	GENMASK(28, 24)
+
+#define MT_AGG_ATCR1(_band)		MT_WF_AGG(_band, 0x0f0)
+#define MT_AGG_ATCR3(_band)		MT_WF_AGG(_band, 0x0f4)
+
 /* ARB: band 0(0x20c00), band 1(0xa0c00) */
 #define MT_WF_ARB_BASE(_band)		((_band) ? 0xa0c00 : 0x20c00)
 #define MT_WF_ARB(_band, ofs)		(MT_WF_ARB_BASE(_band) + (ofs))
@@ -178,6 +207,8 @@
 #define MT_ARB_SCR_TX_DISABLE		BIT(8)
 #define MT_ARB_SCR_RX_DISABLE		BIT(9)
 
+#define MT_ARB_DRNGR0(_band, _n)	MT_WF_ARB(_band, 0x194 + (_n) * 4)
+
 /* RMAC: band 0(0x21400), band 1(0xa1400) */
 #define MT_WF_RMAC_BASE(_band)		((_band) ? 0xa1400 : 0x21400)
 #define MT_WF_RMAC(_band, ofs)		(MT_WF_RMAC_BASE(_band) + (ofs))

drivers/net/wireless/mediatek/mt76/mt7915/testmode.c

+// SPDX-License-Identifier: ISC
+/* Copyright (C) 2020 MediaTek Inc. */
+
+#include "mt7915.h"
+#include "mac.h"
+#include "mcu.h"
+#include "testmode.h"
+
+struct reg_band {
+	u32 band[2];
+};
+
+#define REG_BAND(_reg) \
+	{ .band[0] = MT_##_reg(0), .band[1] = MT_##_reg(1) }
+#define REG_BAND_IDX(_reg, _idx) \
+	{ .band[0] = MT_##_reg(0, _idx), .band[1] = MT_##_reg(1, _idx) }
+
+static const struct reg_band reg_backup_list[] = {
+	REG_BAND_IDX(AGG_PCR0, 0),
+	REG_BAND_IDX(AGG_PCR0, 1),
+	REG_BAND_IDX(AGG_AWSCR0, 0),
+	REG_BAND_IDX(AGG_AWSCR0, 1),
+	REG_BAND_IDX(AGG_AWSCR0, 2),
+	REG_BAND_IDX(AGG_AWSCR0, 3),
+	REG_BAND(AGG_MRCR),
+	REG_BAND(TMAC_TFCR0),
+	REG_BAND(TMAC_TCR0),
+	REG_BAND(AGG_ATCR1),
+	REG_BAND(AGG_ATCR3),
+	REG_BAND(TMAC_TRCR0),
+	REG_BAND(TMAC_ICR0),
+	REG_BAND_IDX(ARB_DRNGR0, 0),
+	REG_BAND_IDX(ARB_DRNGR0, 1),
+};
+
+static int
+mt7915_tm_mode_ctrl(struct mt7915_dev *dev, bool enable)
+{
+	struct {
+		u8 format_id;
+		bool enable;
+		u8 rsv[2];
+	} __packed req = {
+		.format_id = 0x6,
+		.enable = enable,
+	};
+
+	return mt76_mcu_send_msg(&dev->mt76,
+				 MCU_EXT_CMD_TX_POWER_FEATURE_CTRL,
+				 &req, sizeof(req), false);
+}
+
+static int
+mt7915_tm_set_trx(struct mt7915_dev *dev, struct mt7915_phy *phy,
+		  int type, bool en)
+{
+	struct mt7915_tm_cmd req = {
+		.testmode_en = 1,
+		.param_idx = MCU_ATE_SET_TRX,
+		.param.trx.type = type,
+		.param.trx.enable = en,
+		.param.trx.band = phy != &dev->phy,
+	};
+
+	return mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD_ATE_CTRL, &req,
+				 sizeof(req), false);
+}
+
+static void
+mt7915_tm_reg_backup_restore(struct mt7915_dev *dev, struct mt7915_phy *phy)
+{
+	int n_regs = ARRAY_SIZE(reg_backup_list);
+	bool ext_phy = phy != &dev->phy;
+	u32 *b = dev->test.reg_backup;
+	int i;
+
+	if (dev->mt76.test.state == MT76_TM_STATE_OFF) {
+		for (i = 0; i < n_regs; i++)
+			mt76_wr(dev, reg_backup_list[i].band[ext_phy], b[i]);
+		return;
+	}
+
+	if (b)
+		return;
+
+	b = devm_kzalloc(dev->mt76.dev, 4 * n_regs, GFP_KERNEL);
+	if (!b)
+		return;
+
+	dev->test.reg_backup = b;
+	for (i = 0; i < n_regs; i++)
+		b[i] = mt76_rr(dev, reg_backup_list[i].band[ext_phy]);
+
+	mt76_clear(dev, MT_AGG_PCR0(ext_phy, 0), MT_AGG_PCR0_MM_PROT |
+		   MT_AGG_PCR0_GF_PROT | MT_AGG_PCR0_ERP_PROT |
+		   MT_AGG_PCR0_VHT_PROT | MT_AGG_PCR0_BW20_PROT |
+		   MT_AGG_PCR0_BW40_PROT | MT_AGG_PCR0_BW80_PROT);
+	mt76_set(dev, MT_AGG_PCR0(ext_phy, 0), MT_AGG_PCR0_PTA_WIN_DIS);
+
+	mt76_wr(dev, MT_AGG_PCR0(ext_phy, 1), MT_AGG_PCR1_RTS0_NUM_THRES |
+		MT_AGG_PCR1_RTS0_LEN_THRES);
+
+	mt76_clear(dev, MT_AGG_MRCR(ext_phy), MT_AGG_MRCR_BAR_CNT_LIMIT |
+		   MT_AGG_MRCR_LAST_RTS_CTS_RN | MT_AGG_MRCR_RTS_FAIL_LIMIT |
+		   MT_AGG_MRCR_TXCMD_RTS_FAIL_LIMIT);
+
+	mt76_rmw(dev, MT_AGG_MRCR(ext_phy), MT_AGG_MRCR_RTS_FAIL_LIMIT |
+		 MT_AGG_MRCR_TXCMD_RTS_FAIL_LIMIT,
+		 FIELD_PREP(MT_AGG_MRCR_RTS_FAIL_LIMIT, 1) |
+		 FIELD_PREP(MT_AGG_MRCR_TXCMD_RTS_FAIL_LIMIT, 1));
+
+	mt76_wr(dev, MT_TMAC_TFCR0(ext_phy), 0);
+	mt76_clear(dev, MT_TMAC_TCR0(ext_phy), MT_TMAC_TCR0_TBTT_STOP_CTRL);
+}
+
+static void
+mt7915_tm_init(struct mt7915_dev *dev)
+{
+	bool en = !(dev->mt76.test.state == MT76_TM_STATE_OFF);
+
+	if (!test_bit(MT76_STATE_RUNNING, &dev->phy.mt76->state))
+		return;
+
+	mt7915_tm_mode_ctrl(dev, en);
+	mt7915_tm_reg_backup_restore(dev, &dev->phy);
+	mt7915_tm_set_trx(dev, &dev->phy, TM_MAC_TXRX, !en);
+}
+
+static void
+mt7915_tm_set_tx_frames(struct mt7915_dev *dev, bool en)
+{
+	static const u8 spe_idx_map[] = {0, 0, 1, 0, 3, 2, 4, 0,
+					 9, 8, 6, 10, 16, 12, 18, 0};
+	struct sk_buff *skb = dev->mt76.test.tx_skb;
+	struct ieee80211_tx_info *info;
+
+	mt7915_tm_set_trx(dev, &dev->phy, TM_MAC_RX_RXV, false);
+
+	if (en) {
+		u8 tx_ant = dev->mt76.test.tx_antenna_mask;
+
+		mutex_unlock(&dev->mt76.mutex);
+		mt7915_set_channel(&dev->phy);
+		mutex_lock(&dev->mt76.mutex);
+
+		mt7915_mcu_set_chan_info(&dev->phy, MCU_EXT_CMD_SET_RX_PATH);
+		dev->test.spe_idx = spe_idx_map[tx_ant];
+	}
+
+	mt7915_tm_set_trx(dev, &dev->phy, TM_MAC_TX, en);
+
+	if (!en || !skb)
+		return;
+
+	info = IEEE80211_SKB_CB(skb);
+	info->control.vif = dev->phy.monitor_vif;
+}
+
+static int
+mt7915_tm_set_state(struct mt76_dev *mdev, enum mt76_testmode_state state)
+{
+	struct mt7915_dev *dev = container_of(mdev, struct mt7915_dev, mt76);
+	struct mt76_testmode_data *td = &mdev->test;
+	enum mt76_testmode_state prev_state = td->state;
+
+	mdev->test.state = state;
+
+	if (prev_state == MT76_TM_STATE_TX_FRAMES)
+		mt7915_tm_set_tx_frames(dev, false);
+	else if (state == MT76_TM_STATE_TX_FRAMES)
+		mt7915_tm_set_tx_frames(dev, true);
+	else if (prev_state == MT76_TM_STATE_OFF || state == MT76_TM_STATE_OFF)
+		mt7915_tm_init(dev);
+
+	return 0;
+}
+
+const struct mt76_testmode_ops mt7915_testmode_ops = {
+	.set_state = mt7915_tm_set_state,
+};

drivers/net/wireless/mediatek/mt76/mt7915/testmode.h

+// SPDX-License-Identifier: ISC
+/* Copyright (C) 2020 MediaTek Inc. */
+
+#ifndef __MT7915_TESTMODE_H
+#define __MT7915_TESTMODE_H
+
+struct mt7915_tm_trx {
+	u8 type;
+	u8 enable;
+	u8 band;
+	u8 rsv;
+};
+
+struct mt7915_tm_cmd {
+	u8 testmode_en;
+	u8 param_idx;
+	u8 _rsv[2];
+	union {
+		__le32 data;
+		struct mt7915_tm_trx trx;
+		u8 test[72];
+	} param;
+} __packed;
+
+enum {
+	TM_MAC_TX = 1,
+	TM_MAC_RX,
+	TM_MAC_TXRX,
+	TM_MAC_TXRX_RXV,
+	TM_MAC_RXV,
+	TM_MAC_RX_RXV,
+};
+
+#endif