On Wed, Oct 25, 2017 at 1:42 AM, Marcel Holtmann <marcel@xxxxxxxxxxxx> wrote:
> The recent MacBook's with multi-function USB interfaces for HID and
> Bluetooth operation have the isochronous interface on number 3 instead
> of number 1. Store the interface number and use it.
>
> P: Vendor=05ac ProdID=8290 Rev= 1.40
> S: Manufacturer=Broadcom Corp.
> S: Product=Bluetooth USB Host Controller
> C:* #Ifs= 6 Cfg#= 1 Atr=e0 MxPwr= 0mA
> A: FirstIf#= 2 IfCount= 4 Cls=ff(vend.) Sub=01 Prot=01
> I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=01 Driver=usbhid
> E: Ad=85(I) Atr=03(Int.) MxPS= 8 Ivl=10ms
> I:* If#= 1 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=02 Driver=usbhid
> E: Ad=86(I) Atr=03(Int.) MxPS= 8 Ivl=10ms
> I:* If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=01 Prot=01 Driver=btusb
> E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=1ms
> E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
> E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
> I:* If#= 3 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#= 3 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#= 3 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#= 3 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#= 3 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#= 3 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#= 4 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=btusb
> E: Ad=84(I) Atr=02(Bulk) MxPS= 32 Ivl=0ms
> E: Ad=04(O) Atr=02(Bulk) MxPS= 32 Ivl=0ms
> I:* If#= 5 Alt= 0 #EPs= 0 Cls=fe(app. ) Sub=01 Prot=01 Driver=(none)
>
> Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
> ---
> drivers/bluetooth/btusb.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
> index c054d7bce490..c85022efce92 100644
> --- a/drivers/bluetooth/btusb.c
> +++ b/drivers/bluetooth/btusb.c
> @@ -396,6 +396,7 @@ struct btusb_data {
> struct usb_interface *intf;
> struct usb_interface *isoc;
> struct usb_interface *diag;
> + unsigned isoc_ifnum;
>
> unsigned long flags;
>
> @@ -1359,7 +1360,7 @@ static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
> if (!data->isoc)
> return -ENODEV;
>
> - err = usb_set_interface(data->udev, 1, altsetting);
> + err = usb_set_interface(data->udev, data->isoc_ifnum, altsetting);
> if (err < 0) {
> BT_ERR("%s setting interface failed (%d)", hdev->name, -err);
> return err;
> @@ -3106,6 +3107,7 @@ static int btusb_probe(struct usb_interface *intf,
> } else {
> /* Interface orders are hardcoded in the specification */
> data->isoc = usb_ifnum_to_if(data->udev, ifnum_base + 1);
> + data->isoc_ifnum = ifnum_base + 1;
> }
>
> if (!reset)
> --
> 2.13.6
>
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Hi Marcel,
Glad to see my advise helps
I am interested in kernel develop, Willing to send patches for kernel
(In fact this one is my first attempt, but I found the patch format
and email recipient is incorrect)
Are there any tasks I can work on in Bluetooth / USB module? Could you
please give me some advise / task to work on?
I am totally new to Bluetooth / USB driver develop, but I can learn by
doing. I want to kickstart here.
Thanks in advance.
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