On Fri, 2015-07-17 at 11:12 -0600, Daniel Drake wrote:
> btusb currently has a generic match on USB device descriptors:
> { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
>
> However, http://www.usb.org/developers/defined_class states:
>
> Base Class E0h (Wireless Controller)
> This base class is defined for devices that are Wireless
> controllers.
> Values not shown in the table below are reserved. These class codes
> are
> to be used in Interface Descriptors, with the exception of the
> Bluetooth
> class code which can also be used in a Device Descriptor.
>
> Add a match on the interface descriptors accordingly.
> This fixes compatibility with the RTL8723AU device shown below.
> This device conforms to the USB Interface Association Descriptor
> specification, which requires the device to have class ef/02/01.
> The extra IAD descriptor then specifies that interfaces 0 and 1
> belong to the same function/driver, which is true. Provided that
> the Bluetooth device class spec accepts use of the IAD, I imagine
> that
> technically, all btusb devices should be configured like this.
Great, i didn't know whether was allowed hence using the more
conservative _VENDOR_AND_INTERFACE in my patch, but this solution is de
finately nicer.
Tested with a RTL8723AU device on a Radxa Rock Pro board
Reviewed-By: Sjoerd Simons <sjoerd.simons@xxxxxxxxxxxxxxx>
Tested-By: Sjoerd Simons <sjoerd.simons@xxxxxxxxxxxxxxx>
> T: Bus=01 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#= 3 Spd=480 MxCh= 0
> D: Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 1
> P: Vendor=0bda ProdID=0724 Rev= 2.00
> S: Manufacturer=Realtek
> S: Product=802.11n WLAN Adapter
> S: SerialNumber=00e04c000001
> C:* #Ifs= 3 Cfg#= 1 Atr=e0 MxPwr=500mA
> A: FirstIf#= 0 IfCount= 2 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=1ms
> E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E: Ad=82(I) 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=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms
> E: Ad=83(I) 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=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms
> E: Ad=83(I) 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=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms
> E: Ad=83(I) 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=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms
> E: Ad=83(I) 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=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms
> E: Ad=83(I) 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=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms
> E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms
> I:* If#= 2 Alt= 0 #EPs= 4 Cls=ff(vend.) Sub=ff Prot=ff
> Driver=rtl8723au
> E: Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E: Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E: Ad=06(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E: Ad=87(I) Atr=03(Int.) MxPS= 64 Ivl=500us
>
> Signed-off-by: Daniel Drake <drake@xxxxxxxxxxxx>
> ---
> drivers/bluetooth/btusb.c | 1 +
> 1 file changed, 1 insertion(+)
>
> This replaces/obsoletes:
> [PATCH] Bluetooth: btusb: Recognize Realtek shared wifi/bluetooth
> devices
> [PATCH] Bluetooth: btusb: Add Realtek devices into module device
> table
>
> diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
> index 93339a4..9874aac 100644
> --- a/drivers/bluetooth/btusb.c
> +++ b/drivers/bluetooth/btusb.c
> @@ -64,6 +64,7 @@ static struct usb_driver btusb_driver;
> static const struct usb_device_id btusb_table[] = {
> /* Generic Bluetooth USB device */
> { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
> + { USB_INTERFACE_INFO(0xe0, 0x01, 0x01) },
>
> /* Generic Bluetooth AMP device */
> { USB_DEVICE_INFO(0xe0, 0x01, 0x04), .driver_info =
> BTUSB_AMP },
--
Sjoerd Simons <sjoerd.simons@xxxxxxxxxxxxxxx>
Collabora Ltd.
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