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From:   sztsian@gmail.com
To:     marcel@holtmann.org, johan.hedberg@gmail.com,
        linux-bluetooth@vger.kernel.org
Cc:     sztsian@gmail.com, linux-kernel@vger.kernel.org, icenowy@aosc.io
Subject: [PATCH v2 0/1] Bluetooth: btrtl: Add support for RTL8761B
Date:   Fri, 10 Apr 2020 22:54:19 +0800
Message-Id: <20200410145420.108868-1-sztsian@gmail.com>
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From: Ziqian SUN (Zamir) <sztsian@gmail.com>

This patch adds support for the RTL8761B USB Bluetooth dongle.

When I got the RTL8761B dongle, I see it is actually recognised as
RTL8761A in my system (5.5.15-200.fc31.x86_64 on Fedora). And the
userspace cannot detect bluetooth devices in such situation.

[34689.158047] Bluetooth: hci0: RTL: examining hci_ver=0a hci_rev=000b lmp_ver=0a lmp_subver=8761
[34689.159083] Bluetooth: hci0: RTL: rom_version status=0 version=1
[34689.159088] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761a_fw.bin
[34689.159498] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761a_config.bin
[34689.159522] bluetooth hci0: Direct firmware load for rtl_bt/rtl8761a_config.bin failed with error -2
[34689.159529] Bluetooth: hci0: RTL: cfg_sz -2, total sz 20204
[34691.248484] Bluetooth: hci0: command 0xfc20 tx timeout

Icenowy Zheng offered great help by identifying the firmware
from the vendor-provided Windows driver. After applying this patch along
with the firmware I am able to use this dongle.

Note, I don't have RTL8761A device, so I would appreciate if someone 
can help test in case this patch breaks RTL8761A.
The RTL8761A information is from the following Github issue
https://github.com/lwfinger/rtlwifi_new/issues/58

[   41.468873] Bluetooth: hci0: rtl: examining hci_ver=06 hci_rev=000a lmp_ver=06 lmp_subver=8761

Ziqian SUN (Zamir) (1):
  Bluetooth: btrtl: Add support for RTL8761B

 drivers/bluetooth/btrtl.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

-- 
2.25.2