rtl8xxxu: Initial functionality to handle C2H events for 8723bu

The 64 bit mailbox commands also provide a different method for
mailbox command responses (C2H events).
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c

@@ -6815,6 +6815,36 @@ static int rtl8723bu_parse_rx_desc(struct rtl8xxxu_priv *priv,
 	return rx_type;
 }
 
+static void rtl8723bu_handle_c2h(struct rtl8xxxu_priv *priv,
+				 struct sk_buff *skb)
+{
+	struct rtl8723bu_c2h *c2h = (struct rtl8723bu_c2h *)skb->data;
+	struct device *dev = &priv->udev->dev;
+	int len;
+
+	len = skb->len - 2;
+
+	pr_info("%s: C2H ID %02x seq %02x, len %02x %02x\n", __func__,
+		c2h->id, c2h->seq, len, c2h->bt_info.response_source);
+
+	switch(c2h->id) {
+	case C2H_8723B_BT_INFO:
+		if (c2h->bt_info.response_source >
+		    BT_INFO_SRC_8723B_BT_ACTIVE_SEND)
+			dev_info(dev, "C2H_BT_INFO WiFi only firmware\n");
+		else
+			dev_info(dev, "C2H_BT_INFO BT/WiFi coexist firmware\n");
+
+		if (c2h->bt_info.bt_has_reset)
+			dev_info(dev, "BT has been reset\n");
+
+		break;
+	default:
+		pr_info("%s: Unhandled C2H event %02x\n", __func__, c2h->id);
+		break;
+	}
+}
+
 static void rtl8xxxu_rx_complete(struct urb *urb)
 {
 	struct rtl8xxxu_rx_urb *rx_urb =
@@ -6843,8 +6873,10 @@ static void rtl8xxxu_rx_complete(struct urb *urb)
 
 		if (rx_type == RX_TYPE_DATA_PKT)
 			ieee80211_rx_irqsafe(hw, skb);
-		else
+		else {
+			rtl8723bu_handle_c2h(priv, skb);
 			dev_kfree_skb(skb);
+		}
 
 		skb = NULL;
 		rx_urb->urb.context = NULL;

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h

@@ -899,6 +899,60 @@ struct h2c_cmd {
 	};
 };
 
+enum c2h_evt_8723b {
+	C2H_8723B_DEBUG = 0,
+	C2H_8723B_TSF = 1,
+	C2H_8723B_AP_RPT_RSP = 2,
+	C2H_8723B_CCX_TX_RPT = 3,
+	C2H_8723B_BT_RSSI = 4,
+	C2H_8723B_BT_OP_MODE = 5,
+	C2H_8723B_EXT_RA_RPT = 6,
+	C2H_8723B_BT_INFO = 9,
+	C2H_8723B_HW_INFO_EXCH = 10,
+	C2H_8723B_BT_MP_INFO = 11,
+	C2H_8723B_FW_DEBUG = 0xff,
+};
+
+enum bt_info_src_8723b {
+	BT_INFO_SRC_8723B_WIFI_FW = 0x0,
+        BT_INFO_SRC_8723B_BT_RSP = 0x1,
+        BT_INFO_SRC_8723B_BT_ACTIVE_SEND = 0x2,
+};
+
+struct rtl8723bu_c2h {
+	u8 id;
+	u8 seq;
+	union {
+		struct {
+			u8 payload[0];
+		} __packed raw;
+		struct {
+			u8 response_source:4;
+			u8 dummy0_0:4;
+
+			u8 bt_info;
+
+			u8 retry_count:4;
+			u8 dummy2_0:1;
+			u8 bt_page:1;
+			u8 tx_rx_mask:1;
+			u8 dummy2_2:1;
+
+			u8 rssi;
+
+			u8 basic_rate:1;
+			u8 bt_has_reset:1;
+			u8 dummy4_1:1;;
+			u8 ignore_wlan:1;
+			u8 auto_report:1;
+			u8 dummy4_2:3;
+
+			u8 a4;
+			u8 a5;
+		} __packed bt_info;
+	};
+};
+
 struct rtl8xxxu_fileops;
 
 struct rtl8xxxu_priv {