linux-kernel - Re: [PATCH v5 3/3] Bluetooth: btusb: Indicate Microsoft vendor extension for Intel 9160/9260

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Date:   Mon, 6 Apr 2020 14:55:56 -0700
From:   Miao-chen Chou <mcchou@...omium.org>
To:     Marcel Holtmann <marcel@...tmann.org>
Cc:     Bluetooth Kernel Mailing List <linux-bluetooth@...r.kernel.org>,
        Alain Michaud <alainm@...omium.org>,
        Luiz Augusto von Dentz <luiz.von.dentz@...el.com>,
        Johan Hedberg <johan.hedberg@...il.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 3/3] Bluetooth: btusb: Indicate Microsoft vendor
 extension for Intel 9160/9260

I just realized that the patches had been applied to bluetooth-next.
Thanks for the note here, and we will continue the work on top of
these patches from bluetooth-next.

On Sun, Apr 5, 2020 at 11:14 PM Marcel Holtmann <marcel@...tmann.org> wrote:
>
> Hi Miao-chen,
>
> > This adds a bit mask of driver_info for Microsoft vendor extension and
> > indicates the support for Intel 9160/9260. This was verified with Intel
> > ThunderPeak BT controller where msft_opcode is 0xFC1E.
> >
> > Signed-off-by: Marcel Holtmann <marcel@...tmann.org>
> > Signed-off-by: Miao-chen Chou <mcchou@...omium.org>
> > ---
> >
> > Changes in v5:
> > - Extract the changes on btusb as a different commit.
> >
> > Changes in v4:
> > - Introduce CONFIG_BT_MSFTEXT as a starting point of providing a
> > framework to use Microsoft extension
> > - Create include/net/bluetooth/msft.h and net/bluetooth/msft.c to
> > facilitate functions of Microsoft extension.
> >
> > Changes in v3:
> > - Create net/bluetooth/msft.c with struct msft_vnd_ext defined internally
> > and change the hdev->msft_ext field to void*.
> > - Define and expose msft_vnd_ext_set_opcode() for btusb use.
> > - Init hdev->msft_ext in hci_alloc_dev() and deinit it in hci_free_dev().
> >
> > Changes in v2:
> > - Define struct msft_vnd_ext and add a field of this type to struct
> > hci_dev to facilitate the support of Microsoft vendor extension.
> >
> > drivers/bluetooth/btusb.c | 11 ++++++++++-
> > 1 file changed, 10 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
> > index 3bdec42c96123..f73ad18c04559 100644
> > --- a/drivers/bluetooth/btusb.c
> > +++ b/drivers/bluetooth/btusb.c
> > @@ -20,6 +20,7 @@
> >
> > #include <net/bluetooth/bluetooth.h>
> > #include <net/bluetooth/hci_core.h>
> > +#include <net/bluetooth/msft.h>
> >
> > #include "btintel.h"
> > #include "btbcm.h"
> > @@ -58,6 +59,7 @@ static struct usb_driver btusb_driver;
> > #define BTUSB_CW6622          0x100000
> > #define BTUSB_MEDIATEK                0x200000
> > #define BTUSB_WIDEBAND_SPEECH 0x400000
> > +#define BTUSB_MSFT_VND_EXT   0x800000
> >
> > static const struct usb_device_id btusb_table[] = {
> >       /* Generic Bluetooth USB device */
> > @@ -335,7 +337,8 @@ static const struct usb_device_id blacklist_table[] = {
> >
> >       /* Intel Bluetooth devices */
> >       { USB_DEVICE(0x8087, 0x0025), .driver_info = BTUSB_INTEL_NEW |
> > -                                                  BTUSB_WIDEBAND_SPEECH },
> > +                                                  BTUSB_WIDEBAND_SPEECH |
> > +                                                  BTUSB_MSFT_VND_EXT },
> >       { USB_DEVICE(0x8087, 0x0026), .driver_info = BTUSB_INTEL_NEW |
> >                                                    BTUSB_WIDEBAND_SPEECH },
> >       { USB_DEVICE(0x8087, 0x0029), .driver_info = BTUSB_INTEL_NEW |
> > @@ -3800,6 +3803,12 @@ static int btusb_probe(struct usb_interface *intf,
> >               set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
> >               set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
> >               set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
> > +
> > +             /* All Intel controllers that support the Microsoft
> > +              * vendor extension are using 0xFC1E for VsMsftOpCode.
> > +              */
> > +             if (id->driver_info & BTUSB_MSFT_VND_EXT)
> > +                     msft_set_opcode(hdev, 0xFC1E);
>
> I decided to actually set the MSFT extension support in the btusb_setup_intel_new handler based on our firmware version information. I think that this will be better than USB products IDs. We can revisit this later, but for now, this should be enough.
>
> Johan also applied the whole series and you should base your next steps on bluetooth-next.
>
> Regards
>
> Marcel
>