[v4,06/18] wifi: rtl8xxxu: Allow creating interface in AP mode

Commit Message

Martin Kaistra April 28, 2023, 3:08 p.m. UTC

Use the sequence from the vendor driver for setting up the beacon
related registers.
Also set the MAC address register here, in case the MAC address for the
new interface should be different from what was set in
rtl8xxxu_init_device(). This happens for example with the hostapd config
option "bssid".

Signed-off-by: Martin Kaistra <[e-mail]>
Reviewed-by: Ping-Ke Shih <[e-mail]>
---
 .../wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 31 ++++++++++++++++---
 .../wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h |  2 ++
 2 files changed, 29 insertions(+), 4 deletions(-)

Patch

diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
index 9d08a1c8c3b34..ab4a1f83c760c 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
@@ -6471,18 +6471,39 @@  static int rtl8xxxu_add_interface(struct ieee80211_hw *hw,
 	int ret;
 	u8 val8;
 
+	if (!priv->vif)
+		priv->vif = vif;
+	else
+		return -EOPNOTSUPP;
+
 	switch (vif->type) {
 	case NL80211_IFTYPE_STATION:
-		if (!priv->vif)
-			priv->vif = vif;
-		else
-			return -EOPNOTSUPP;
 		rtl8xxxu_stop_tx_beacon(priv);
 
 		val8 = rtl8xxxu_read8(priv, REG_BEACON_CTRL);
 		val8 |= BEACON_ATIM | BEACON_FUNCTION_ENABLE |
 			BEACON_DISABLE_TSF_UPDATE;
 		rtl8xxxu_write8(priv, REG_BEACON_CTRL, val8);
+		ret = 0;
+		break;
+	case NL80211_IFTYPE_AP:
+		rtl8xxxu_write8(priv, REG_BEACON_CTRL,
+				BEACON_DISABLE_TSF_UPDATE | BEACON_CTRL_MBSSID);
+		rtl8xxxu_write8(priv, REG_ATIMWND, 0x0c); /* 12ms */
+		rtl8xxxu_write16(priv, REG_TSFTR_SYN_OFFSET, 0x7fff); /* ~32ms */
+		rtl8xxxu_write8(priv, REG_DUAL_TSF_RST, DUAL_TSF_RESET_TSF0);
+
+		/* enable BCN0 function */
+		rtl8xxxu_write8(priv, REG_BEACON_CTRL,
+				BEACON_DISABLE_TSF_UPDATE |
+				BEACON_FUNCTION_ENABLE | BEACON_CTRL_MBSSID |
+				BEACON_CTRL_TX_BEACON_RPT);
+
+		/* select BCN on port 0 */
+		val8 = rtl8xxxu_read8(priv, REG_CCK_CHECK);
+		val8 &= ~BIT_BCN_PORT_SEL;
+		rtl8xxxu_write8(priv, REG_CCK_CHECK, val8);
+
 		ret = 0;
 		break;
 	default:
@@ -6490,6 +6511,8 @@  static int rtl8xxxu_add_interface(struct ieee80211_hw *hw,
 	}
 
 	rtl8xxxu_set_linktype(priv, vif->type);
+	ether_addr_copy(priv->mac_addr, vif->addr);
+	rtl8xxxu_set_mac(priv);
 
 	return ret;
 }
diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h
index ad285e4ac0ec4..8571d5129f327 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h
@@ -575,6 +575,8 @@ 
 #define REG_ARFR1			0x0448
 #define REG_ARFR2			0x044c
 #define REG_ARFR3			0x0450
+#define REG_CCK_CHECK			0x0454
+#define BIT_BCN_PORT_SEL		BIT(5)
 #define REG_AMPDU_MAX_TIME_8723B	0x0456
 #define REG_AGGLEN_LMT			0x0458
 #define REG_AMPDU_MIN_SPACE		0x045c