On 2-7-2017 20:12, Larry Finger wrote:

From: Ping-Ke Shih <pkshih@realtek.com>

We use H2C to ask BT's status, and C2H will return the status.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Larry Finger <redacted>
Cc: Yan-Hsuan Chuang <redacted>
Cc: Birming Chiu <redacted>
Cc: Shaofu <redacted>
Cc: Steven Ting <redacted>
---
v2 - no changes
v3 - no changes
v4 - no changes
---
 .../realtek/rtlwifi/btcoexist/halbtcoutsrc.c       | 17 ++++++++++++-
 .../wireless/realtek/rtlwifi/btcoexist/rtl_btc.c   | 28 ++++++++++++++++++++++
 .../wireless/realtek/rtlwifi/btcoexist/rtl_btc.h   |  1 +
 .../net/wireless/realtek/rtlwifi/rtl8192ee/fw.c    |  9 +++++--
 .../net/wireless/realtek/rtlwifi/rtl8723be/fw.c    |  9 +++++--
 .../net/wireless/realtek/rtlwifi/rtl8821ae/fw.c    | 13 +++++++---
 drivers/net/wireless/realtek/rtlwifi/wifi.h        |  2 ++
 7 files changed, 71 insertions(+), 8 deletions(-)

[...]

 
+void rtl_btc_btmpinfo_notify(struct rtl_priv *rtlpriv, u8 *tmp_buf, u8 length)
+{
+	u8 extid, seq, len;
+	u16 bt_real_fw_ver;
+	u8 bt_fw_ver;
+
+	if ((length < 4) || (!tmp_buf))
+		return;
+
+	extid = tmp_buf[0];
+	/* not response from BT FW then exit*/
+	if (extid != 1) /* C2H_TRIG_BY_BT_FW = 1 */
+		return;
+
+	len = tmp_buf[1] >> 4;
+	seq = tmp_buf[2] >> 4;
+
+	/* BT Firmware version response */
+	if (seq == 0x0E) {
+		bt_real_fw_ver = tmp_buf[3] | (tmp_buf[4] << 8);
+		bt_fw_ver = tmp_buf[5];
+
+		gl_bt_coexist.bt_info.bt_real_fw_ver = bt_real_fw_ver;
+		gl_bt_coexist.bt_info.bt_fw_ver = bt_fw_ver;
+	}
+}

Just stumbled upon this and curious. I assume gl_bt_coexist is a global
variable so I guess this code will not work when running multiple
realtek device with btcoexist on your system.

Regards,
Arend