netdev - Re: [PATCH 0/4] TI Bluetooth serdev support

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Date:   Tue, 9 May 2017 07:48:37 +0300
From:   Baruch Siach <baruch@...s.co.il>
To:     Rob Herring <robh@...nel.org>
Cc:     Adam Ford <aford173@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Gustavo Padovan <gustavo@...ovan.org>,
        Marcel Holtmann <marcel@...tmann.org>,
        Sebastian Reichel <sre@...nel.org>,
        Wei Xu <xuwei5@...ilicon.com>,
        "open list:BLUETOOTH DRIVERS" <linux-bluetooth@...r.kernel.org>,
        Eyal Reizer <eyalr@...com>, netdev <netdev@...r.kernel.org>,
        Satish Patel <satish.patel@...aro.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 0/4] TI Bluetooth serdev support

Hi Rob,

On Mon, May 08, 2017 at 04:12:16PM -0500, Rob Herring wrote:
> On Fri, May 5, 2017 at 9:51 AM, Adam Ford <aford173@...il.com> wrote:
> > On Sun, Apr 30, 2017 at 11:04 AM, Sebastian Reichel <sre@...nel.org> wrote:
> >> On Sun, Apr 30, 2017 at 10:14:20AM -0500, Adam Ford wrote:
> >>> On Wed, Apr 5, 2017 at 1:30 PM, Rob Herring <robh@...nel.org> wrote:
> >>> > This series adds serdev support to the HCI LL protocol used on TI BT
> >>> > modules and enables support on HiKey board with with the WL1835 module.
> >>> > With this the custom TI UIM daemon and btattach are no longer needed.
> >>>
> >>> Without UIM daemon, what instruction do you use to load the BT firmware?
> >>>
> >>> I was thinking 'hciattach' but I was having trouble.  I was hoping you
> >>> might have some insight.
> >>>
> >>>  hciattach -t 30 -s 115200 /dev/ttymxc1 texas 3000000 flow  Just
> >>> returns a timeout.
> >>>
> >>> I modified my i.MX6 device tree per the binding documentation and
> >>> setup the regulators and enable GPIO pins.
> >>
> >> If you configured everything correctly no userspace interaction is
> >> required. The driver should request the firmware automatically once
> >> you power up the bluetooth device.
> >>
> >> Apart from DT changes make sure, that the following options are
> >> enabled and check dmesg for any hints.
> >>
> >> CONFIG_SERIAL_DEV_BUS
> >> CONFIG_SERIAL_DEV_CTRL_TTYPORT
> >> CONFIG_BT_HCIUART
> >> CONFIG_BT_HCIUART_LL
> >
> > I have enabled those flags, and I have updated my device tree.
> > I am testing this on an OMAP3630 (DM3730) board with a WL1283.  I am
> > getting a lot of timeout errors.  I tested this against the original
> > implemention I had in pdata-quirks.c using the ti-st driver, uim & and
> > the btwilink driver.
> >
> > I pulled in some of the newer patches to enable the wl1283-st, but I
> > am obviously missing something.
> >
> > I   58.717651] Bluetooth: hci0: Reading TI version information failed
> > (-110)
> > [   58.724853] Bluetooth: hci0: download firmware failed, retrying...
> > [   60.957641] Bluetooth: hci0 command 0x1001 tx timeout
> > [   68.957641] Bluetooth: hci0: Reading TI version information failed
> > (-110)
> > [   68.964843] Bluetooth: hci0: download firmware failed, retrying...
> > [   69.132171] Bluetooth: Unknown HCI packet type 06
> > [   69.138244] Bluetooth: Unknown HCI packet type 0c
> > [   69.143249] Bluetooth: Unknown HCI packet type 40
> > [   69.148498] Bluetooth: Unknown HCI packet type 20
> > [   69.153533] Bluetooth: Data length is too large
> > [   69.158569] Bluetooth: Unknown HCI packet type a0
> > [   69.163574] Bluetooth: Unknown HCI packet type 00
> > [   69.168731] Bluetooth: Unknown HCI packet type 00
> > [   69.173736] Bluetooth: Unknown HCI packet type 34
> > [   69.178924] Bluetooth: Unknown HCI packet type 91
> > [   71.197631] Bluetooth: hci0 command 0x1001 tx timeout
> > [   79.197662] Bluetooth: hci0: Reading TI version information failed (-110)
> 
> There's a bug in serdev_device_write(), so if you have that function
> you need either the fix I sent or the patch to make
> serdev_device_writebuf atomic again. Both are on the linux-serial
> list, but not in any tree yet.

You refer to the patches below, right?

  [PATCH] tty: serdev: fix serdev_device_write return value, 
  http://www.spinics.net/lists/linux-serial/msg26117.html

  [PATCH] serdev: Restore serdev_device_write_buf for atomic context,
  http://www.spinics.net/lists/linux-serial/msg26113.html

baruch

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