[PATCH 0/2] rtw88: add set antenna support

[PATCH 0/2] rtw88: add set antenna support

[yhchuang]

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

Add support for ieee80211_ops::set_antenna to allow user space to

set the TX/RX antenna path. This is useful for a user wants to see
the output of different antenna/path.

Yan-Hsuan Chuang (2):
  rtw88: make rtw_chip_ops::set_antenna return int
  rtw88: add support for set/get antennas

 drivers/net/wireless/realtek/rtw88/mac80211.c | 33 +++++++++++++++++
 drivers/net/wireless/realtek/rtw88/main.c     |  3 ++
 drivers/net/wireless/realtek/rtw88/main.h     |  9 ++---
 drivers/net/wireless/realtek/rtw88/rtw8822b.c | 18 ++++++----
 drivers/net/wireless/realtek/rtw88/rtw8822c.c | 35 +++++++++++++++++++
 5 files changed, 88 insertions(+), 10 deletions(-)

-- 
2.17.1

[PATCH 1/2] rtw88: make rtw_chip_ops::set_antenna return int

[yhchuang]

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

To support ieee80211_ops::set_antenna, the driver can decide if the
antenna mask is accepted, otherwise it can return an error code.
Because each chip could have different limitations, let the chip
check the mask and return.

Also the antenna mask for TRX from upper space is 32-bit long.
Change the antenna mask for rtw_chip_ops::set_antenna from u8 to u32.

Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
---
 drivers/net/wireless/realtek/rtw88/main.h     |  9 +++++----
 drivers/net/wireless/realtek/rtw88/rtw8822b.c | 18 ++++++++++++------
 2 files changed, 17 insertions(+), 10 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw88/main.h b/drivers/net/wireless/realtek/rtw88/main.h
index c6b590fdb573..c9edcabd7c42 100644
--- a/drivers/net/wireless/realtek/rtw88/main.h
+++ b/drivers/net/wireless/realtek/rtw88/main.h
@@ -798,8 +798,9 @@ struct rtw_chip_ops {
 	void (*set_tx_power_index)(struct rtw_dev *rtwdev);
 	int (*rsvd_page_dump)(struct rtw_dev *rtwdev, u8 *buf, u32 offset,
 			      u32 size);
-	void (*set_antenna)(struct rtw_dev *rtwdev, u8 antenna_tx,
-			    u8 antenna_rx);
+	int (*set_antenna)(struct rtw_dev *rtwdev,
+			   u32 antenna_tx,
+			   u32 antenna_rx);
 	void (*cfg_ldo25)(struct rtw_dev *rtwdev, bool enable);
 	void (*false_alarm_statistics)(struct rtw_dev *rtwdev);
 	void (*phy_calibration)(struct rtw_dev *rtwdev);
@@ -1567,8 +1568,8 @@ struct rtw_hal {
 	u8 sec_ch_offset;
 	u8 rf_type;
 	u8 rf_path_num;
-	u8 antenna_tx;
-	u8 antenna_rx;
+	u32 antenna_tx;
+	u32 antenna_rx;
 	u8 bfee_sts_cap;
 
 	/* protect tx power section */
diff --git a/drivers/net/wireless/realtek/rtw88/rtw8822b.c b/drivers/net/wireless/realtek/rtw88/rtw8822b.c
index 4dd7d4143b04..c02f3a730369 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8822b.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8822b.c
@@ -998,8 +998,9 @@ static bool rtw8822b_check_rf_path(u8 antenna)
 	}
 }
 
-static void rtw8822b_set_antenna(struct rtw_dev *rtwdev, u8 antenna_tx,
-				 u8 antenna_rx)
+static int rtw8822b_set_antenna(struct rtw_dev *rtwdev,
+				u32 antenna_tx,
+				u32 antenna_rx)
 {
 	struct rtw_hal *hal = &rtwdev->hal;
 
@@ -1007,16 +1008,21 @@ static void rtw8822b_set_antenna(struct rtw_dev *rtwdev, u8 antenna_tx,
 		antenna_tx, antenna_rx);
 
 	if (!rtw8822b_check_rf_path(antenna_tx)) {
-		rtw_info(rtwdev, "unsupport tx path, set to default path ab\n");
-		antenna_tx = BB_PATH_AB;
+		rtw_info(rtwdev, "unsupport tx path 0x%x\n", antenna_tx);
+		return -EINVAL;
 	}
+
 	if (!rtw8822b_check_rf_path(antenna_rx)) {
-		rtw_info(rtwdev, "unsupport rx path, set to default path ab\n");
-		antenna_rx = BB_PATH_AB;
+		rtw_info(rtwdev, "unsupport rx path 0x%x\n", antenna_rx);
+		return -EINVAL;
 	}
+
 	hal->antenna_tx = antenna_tx;
 	hal->antenna_rx = antenna_rx;
+
 	rtw8822b_config_trx_mode(rtwdev, antenna_tx, antenna_rx, false);
+
+	return 0;
 }
 
 static void rtw8822b_cfg_ldo25(struct rtw_dev *rtwdev, bool enable)
-- 
2.17.1

Re: [PATCH 1/2] rtw88: make rtw_chip_ops::set_antenna return int

[Kalle Valo]

<yhchuang@realtek.com> wrote:

> From: Yan-Hsuan Chuang <yhchuang@realtek.com>
> 
> To support ieee80211_ops::set_antenna, the driver can decide if the
> antenna mask is accepted, otherwise it can return an error code.
> Because each chip could have different limitations, let the chip
> check the mask and return.
> 
> Also the antenna mask for TRX from upper space is 32-bit long.
> Change the antenna mask for rtw_chip_ops::set_antenna from u8 to u32.
> 
> Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>

2 patches applied to wireless-drivers-next.git, thanks.

b9ed7e9505ba rtw88: make rtw_chip_ops::set_antenna return int
297bcf8222f2 rtw88: add support for set/get antennas

-- 
https://patchwork.kernel.org/patch/11483097/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches

[PATCH 2/2] rtw88: add support for set/get antennas

[yhchuang]

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

User space program such as iw can set antenna mask for the device.
So add set antenna support by configure the trx mode.

This is useful for some tests want to see the output of different
antenna configuration (e.g. path A v.s. path B).

Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
---
 drivers/net/wireless/realtek/rtw88/mac80211.c | 33 +++++++++++++++++
 drivers/net/wireless/realtek/rtw88/main.c     |  3 ++
 drivers/net/wireless/realtek/rtw88/rtw8822c.c | 35 +++++++++++++++++++
 3 files changed, 71 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtw88/mac80211.c b/drivers/net/wireless/realtek/rtw88/mac80211.c
index d7d02e4c0184..a2e6ef4ad9ee 100644
--- a/drivers/net/wireless/realtek/rtw88/mac80211.c
+++ b/drivers/net/wireless/realtek/rtw88/mac80211.c
@@ -754,6 +754,37 @@ static int rtw_ops_set_bitrate_mask(struct ieee80211_hw *hw,
 	return 0;
 }
 
+static int rtw_ops_set_antenna(struct ieee80211_hw *hw,
+			       u32 tx_antenna,
+			       u32 rx_antenna)
+{
+	struct rtw_dev *rtwdev = hw->priv;
+	struct rtw_chip_info *chip = rtwdev->chip;
+	int ret;
+
+	if (!chip->ops->set_antenna)
+		return -EOPNOTSUPP;
+
+	mutex_lock(&rtwdev->mutex);
+	ret = chip->ops->set_antenna(rtwdev, tx_antenna, rx_antenna);
+	mutex_unlock(&rtwdev->mutex);
+
+	return ret;
+}
+
+static int rtw_ops_get_antenna(struct ieee80211_hw *hw,
+			       u32 *tx_antenna,
+			       u32 *rx_antenna)
+{
+	struct rtw_dev *rtwdev = hw->priv;
+	struct rtw_hal *hal = &rtwdev->hal;
+
+	*tx_antenna = hal->antenna_tx;
+	*rx_antenna = hal->antenna_rx;
+
+	return 0;
+}
+
 #ifdef CONFIG_PM
 static int rtw_ops_suspend(struct ieee80211_hw *hw,
 			   struct cfg80211_wowlan *wowlan)
@@ -815,6 +846,8 @@ const struct ieee80211_ops rtw_ops = {
 	.sta_statistics		= rtw_ops_sta_statistics,
 	.flush			= rtw_ops_flush,
 	.set_bitrate_mask	= rtw_ops_set_bitrate_mask,
+	.set_antenna		= rtw_ops_set_antenna,
+	.get_antenna		= rtw_ops_get_antenna,
 #ifdef CONFIG_PM
 	.suspend		= rtw_ops_suspend,
 	.resume			= rtw_ops_resume,
diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c
index 7640e97706f5..1e1d2c774287 100644
--- a/drivers/net/wireless/realtek/rtw88/main.c
+++ b/drivers/net/wireless/realtek/rtw88/main.c
@@ -1450,6 +1450,7 @@ EXPORT_SYMBOL(rtw_core_deinit);
 
 int rtw_register_hw(struct rtw_dev *rtwdev, struct ieee80211_hw *hw)
 {
+	struct rtw_hal *hal = &rtwdev->hal;
 	int max_tx_headroom = 0;
 	int ret;
 
@@ -1478,6 +1479,8 @@ int rtw_register_hw(struct rtw_dev *rtwdev, struct ieee80211_hw *hw)
 				     BIT(NL80211_IFTYPE_AP) |
 				     BIT(NL80211_IFTYPE_ADHOC) |
 				     BIT(NL80211_IFTYPE_MESH_POINT);
+	hw->wiphy->available_antennas_tx = hal->antenna_tx;
+	hw->wiphy->available_antennas_rx = hal->antenna_rx;
 
 	hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
 			    WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
diff --git a/drivers/net/wireless/realtek/rtw88/rtw8822c.c b/drivers/net/wireless/realtek/rtw88/rtw8822c.c
index dc07e6be38e8..c99b1de54bfc 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8822c.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8822c.c
@@ -1890,6 +1890,40 @@ static void rtw8822c_set_tx_power_index(struct rtw_dev *rtwdev)
 	}
 }
 
+static int rtw8822c_set_antenna(struct rtw_dev *rtwdev,
+				u32 antenna_tx,
+				u32 antenna_rx)
+{
+	struct rtw_hal *hal = &rtwdev->hal;
+
+	switch (antenna_tx) {
+	case BB_PATH_A:
+	case BB_PATH_B:
+	case BB_PATH_AB:
+		break;
+	default:
+		rtw_info(rtwdev, "unsupport tx path 0x%x\n", antenna_tx);
+		return -EINVAL;
+	}
+
+	/* path B only is not available for RX */
+	switch (antenna_rx) {
+	case BB_PATH_A:
+	case BB_PATH_AB:
+		break;
+	default:
+		rtw_info(rtwdev, "unsupport rx path 0x%x\n", antenna_rx);
+		return -EINVAL;
+	}
+
+	hal->antenna_tx = antenna_tx;
+	hal->antenna_rx = antenna_rx;
+
+	rtw8822c_config_trx_mode(rtwdev, antenna_tx, antenna_rx, false);
+
+	return 0;
+}
+
 static void rtw8822c_cfg_ldo25(struct rtw_dev *rtwdev, bool enable)
 {
 	u8 ldo_pwr;
@@ -3794,6 +3828,7 @@ static struct rtw_chip_ops rtw8822c_ops = {
 	.read_rf		= rtw_phy_read_rf,
 	.write_rf		= rtw_phy_write_rf_reg_mix,
 	.set_tx_power_index	= rtw8822c_set_tx_power_index,
+	.set_antenna		= rtw8822c_set_antenna,
 	.cfg_ldo25		= rtw8822c_cfg_ldo25,
 	.false_alarm_statistics	= rtw8822c_false_alarm_statistics,
 	.dpk_track		= rtw8822c_dpk_track,
-- 
2.17.1