[PATCH] Signed-off-by: lespink <lespinks9@gmail.com> Bluetooth: btusb: Add support for Mercusys MA530 (2c4e:0115)

[PATCH] Signed-off-by: lespink <lespinks9@gmail.com> Bluetooth: btusb: Add support for Mercusys MA530 (2c4e:0115)

[lespink]

Add support for the Realtek-based Mercusys MA530 Bluetooth 5.3 USB dongle
which was previously unrecognized by the kernel and thus non-functional.

The device is identified as USB ID 2c4e:0115 and shows up with no
manufacturer string and product "Mercusys MA530 Adapter".

The following is the relevant output from /sys/kernel/debug/usb/devices:

T:  Bus=01 Lev=01 Prnt=01 Port=08 Cnt=05 Dev#= 10 Spd=12   MxCh= 0
D:  Ver= 1.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=2c4e ProdID=0115 Rev= 2.00
S:  Manufacturer=
S:  Product=Mercusys MA530 Adapter
S:  SerialNumber=30169DA2555D
C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
...

The kernel dmesg log shows the firmware loading sequence works fine:

[  +0.002087] Bluetooth: hci0: RTL: examining hci_ver=0a hci_rev=000b
[  +0.001000] Bluetooth: hci0: RTL: rom_version status=0 version=1
[  +0.000009] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761bu_fw.bin
[  +0.002938] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761bu_config.bin
[  +0.000242] Bluetooth: hci0: RTL: cfg_sz 6, total sz 30210
[  +0.148802] Bluetooth: hci0: RTL: fw version 0xdfc6d922

Signed-off-by: lespink <lespinks9@gmail.com>
---
 drivers/bluetooth/btusb.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 5e9ebf0c5312..2c6dace7f0b1 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -605,6 +605,10 @@ static const struct usb_device_id quirks_table[] = {
 	  .driver_info = BTUSB_MEDIATEK |
 			 BTUSB_WIDEBAND_SPEECH },
 
+    /* Mercusys MA530 Adapter */
+    { USB_DEVICE(0x2c4e, 0x0115), .driver_info = BTUSB_REALTEK |
+                             BTUSB_WIDEBAND_SPEECH },
+
 	/* Additional MediaTek MT7615E Bluetooth devices */
 	{ USB_DEVICE(0x13d3, 0x3560), .driver_info = BTUSB_MEDIATEK},
 
-- 
2.51.0