• Alexander Hall's avatar
    Bluetooth: btusb: Add MediaTek MT7925-B22M support ID 0x13d3:0x3604 · f9685f31
    Alexander Hall authored
    This patch fixes bluetooth support on the MediaTek MT7925 WiFi 7 +
    BT 5.3 M.2 chipset that I purchased from aliexpress (and which
    arrived today). The PCB states that it is an MT7925B22M.
    
    Device from /sys/kernel/debug/usb/devices:
    
    T:  Bus=03 Lev=02 Prnt=03 Port=02 Cnt=01 Dev#=  4 Spd=480  MxCh= 0
    D:  Ver= 2.10 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
    P:  Vendor=13d3 ProdID=3604 Rev= 1.00
    S:  Manufacturer=MediaTek Inc.
    S:  Product=Wireless_Device
    S:  SerialNumber=000000000
    C:* #Ifs= 3 Cfg#= 1 Atr=e0 MxPwr=100mA
    A:  FirstIf#= 0 IfCount= 3 Cls=e0(wlcon) Sub=01 Prot=01
    I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
    E:  Ad=81(I) Atr=03(Int.) MxPS=  16 Ivl=125us
    E:  Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
    E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
    I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
    E:  Ad=83(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
    E:  Ad=03(O) Atr=01(Isoc) MxPS=   0 Ivl=1ms
    I:  If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
    E:  Ad=83(I) Atr=01(Isoc) MxPS=   9 Ivl=1ms
    E:  Ad=03(O) Atr=01(Isoc) MxPS=   9 Ivl=1ms
    I:  If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
    E:  Ad=83(I) Atr=01(Isoc) MxPS=  17 Ivl=1ms
    E:  Ad=03(O) Atr=01(Isoc) MxPS=  17 Ivl=1ms
    I:  If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
    E:  Ad=83(I) Atr=01(Isoc) MxPS=  25 Ivl=1ms
    E:  Ad=03(O) Atr=01(Isoc) MxPS=  25 Ivl=1ms
    I:  If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
    E:  Ad=83(I) Atr=01(Isoc) MxPS=  33 Ivl=1ms
    E:  Ad=03(O) Atr=01(Isoc) MxPS=  33 Ivl=1ms
    I:  If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
    E:  Ad=83(I) Atr=01(Isoc) MxPS=  49 Ivl=1ms
    E:  Ad=03(O) Atr=01(Isoc) MxPS=  49 Ivl=1ms
    I:  If#= 1 Alt= 6 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
    E:  Ad=83(I) Atr=01(Isoc) MxPS=  63 Ivl=1ms
    E:  Ad=03(O) Atr=01(Isoc) MxPS=  63 Ivl=1ms
    I:* If#= 2 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=(none)
    E:  Ad=8a(I) Atr=03(Int.) MxPS=  64 Ivl=125us
    E:  Ad=0a(O) Atr=03(Int.) MxPS=  64 Ivl=125us
    I:  If#= 2 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=(none)
    E:  Ad=8a(I) Atr=03(Int.) MxPS= 512 Ivl=125us
    E:  Ad=0a(O) Atr=03(Int.) MxPS= 512 Ivl=125us
    
    High fidelity images I took of the chip itself for future reference:
    https://archive.org/details/MediaTek-MT7925B22M/
    
    Webpage the chip was purchased from, note it is different from the
    images taken:
    https://web.archive.org/web/20240620021119/https://www.aliexpress.
    us/item/3256806821207897.html
    Signed-off-by: default avatarAlexander Hall <bearodark@gmail.com>
    Signed-off-by: default avatarLuiz Augusto von Dentz <luiz.von.dentz@intel.com>
    f9685f31
btusb.c 118 KB