From: Bin Liu <b-liu@ti.com>
To: Ayaka <ayaka@soulik.info>
Cc: <linux-usb@vger.kernel.org>, Felipe Balbi <balbi@kernel.org>,
<gregkh@linuxfoundation.org>, <linux-kernel@vger.kernel.org>
Subject: Re: musb: am3358: having problem with high-speed on usb1 at peripheral
Date: Tue, 23 Aug 2016 10:17:39 -0500 [thread overview]
Message-ID: <20160823151739.GA4050@uda0271908> (raw)
In-Reply-To: <40498A37-039E-4A40-8795-76064956010C@soulik.info>
Hi,
On Tue, Aug 23, 2016 at 09:57:17AM +0800, Ayaka wrote:
>
>
> 從我的 iPad 傳送
>
> > Bin Liu <b-liu@ti.com> 於 2016年8月19日 上午12:08 寫道：
> >
> > Hi,
> >
> >> On Fri, Aug 12, 2016 at 10:23:15AM +0800, ayaka wrote:
> >> Hello all:
> >> I recently add a support for customize am3358 board using the branch
> >> processor-sdk-linux-03.00.00 from Ti git. But I meet a problem with musb
> >> at the peripheral mode.
> >> I have force usb1 in peripheral mode in dts as it only have USB_DP,
> >> USB_DM and USBDRV connected. I start up a ether gadget using the configfs,
> >
> > Do you mean USB1_DRVVBUS pin? If so, you have wrong hw design. For
> > peripheral mode, you should float this pin, but connect USB1_VBUS pin
> > instead.
> >
> Thank you very much. After hardware modification, it could work on hi-speed mode now.
> But I wonder it have effect? As the vbus is not used to transmit data in USB?
>From am3358 perspective, USB1_VBUS is an input pin, which is one of the
conditions for musb role switching. More detail is in the am335x TRM.
Regards,
-Bin.
> > Regards,
> > -Bin.
> >
> >> But I found it would always work on the USB 2.0 full speed mode,
> >> even the testmode can't force it in high speed mode or it won't appear
> >> at host side. If I want it work at high speed mode, what should I do?
> >> I also meet the DMA problem, I have to apply the "ARM: dts: am33xx:
> >> fix DMA support for the second USB interface", but does patches really
> >> work? Although it make the error message disapear, but the mail list
> >> said the just make the usb back to PIO mode.
> >>
> >> --
> >> 2.7.4
> >>
> >> --
> >> To unsubscribe from this list: send the line "unsubscribe linux-usb" in
> >> the body of a message to majordomo@vger.kernel.org
> >> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
prev parent reply other threads:[~2016-08-23 15:20 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-12 2:23 musb: am3358: having problem with high-speed on usb1 at peripheral ayaka
2016-08-12 7:40 ` Greg KH
2016-08-12 16:38 ` ayaka
2016-08-12 17:44 ` Greg KH
2016-08-12 17:59 ` ayaka
2016-08-16 7:10 ` Felipe Balbi
2016-08-16 8:10 ` Ayaka
2016-08-16 8:31 ` Felipe Balbi
2016-08-16 14:05 ` ayaka
2016-08-18 6:35 ` Felipe Balbi
2016-08-15 20:53 ` musb: am3358: having performance problem with usb1 ayaka
2016-08-18 16:08 ` musb: am3358: having problem with high-speed on usb1 at peripheral Bin Liu
2016-08-23 1:57 ` Ayaka
2016-08-23 15:17 ` Bin Liu [this message]
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