linux-kernel - Re: [PATCH v14 9/9] usb: Adding SuperSpeed support to dummy

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Message-ID: <f9d67e63898f6f307e602f856fa5c001.squirrel@www.codeaurora.org>
Date:	Tue, 31 May 2011 11:40:44 -0700 (PDT)
From:	"Brokhman Tatyana" <tlinder@...eaurora.org>
To:	"Alan Stern" <stern@...land.harvard.edu>
Cc:	"Tatyana Brokhman" <tlinder@...eaurora.org>, greg@...ah.com,
	linux-usb@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	balbi@...com, ablay@...eaurora.org,
	"open list" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v14 9/9] usb: Adding SuperSpeed support to dummy_hcd

Hi Alan,

> If is_super_speed is false, shouldn't you avoid registering the
> SuperSpeed hub?  Or would that add too many complications?

It woun't add too many complications but I would prefere not to do that.
My goal was to simulate as much as posible "real" USB connection so the
is_super_speed flag simulates the USB port you connect to, HS/SS. When
working with a real host if you connect a HS device to a SS port it
connects to a HS root hub but the SS root hub is functional and
registered. So I don't see any reason not to register it for dummy_hcd as
well.

>> diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
>> index 5927541..d5f0af7 100644
>> --- a/drivers/usb/gadget/Kconfig
>> +++ b/drivers/usb/gadget/Kconfig
>> @@ -626,6 +626,7 @@ config USB_DUMMY_HCD
>>  	depends on USB_GADGET_DUMMY_HCD
>>  	default USB_GADGET
>>  	select USB_GADGET_SELECTED
>> +	select USB_GADGET_SUPERSPEED
>
> This belongs under USB_GADGET_DUMMY_HCD, next to the "select
> USB_GADGET_DUALSPEED" line.

ok, thanks. Will update.

Thanks,
Tanya Brokhman
-- 
Sent by an consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.


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