On Tue, Aug 14, 2018 at 9:36 AM, Greg KH wrote:
> On Tue, Aug 14, 2018 at 09:29:26AM +0300, Ran Shalit wrote:
>> On Mon, Aug 13, 2018 at 9:57 PM, Greg KH wrote:
>> > On Mon, Aug 13, 2018 at 09:34:37PM +0300, Ran Shalit wrote:
>> >> Hello,
>> >>
>&g
On Mon, Aug 13, 2018 at 9:57 PM, Greg KH wrote:
> On Mon, Aug 13, 2018 at 09:34:37PM +0300, Ran Shalit wrote:
>> Hello,
>>
>> I have a strange behabiour with sound card usb.
>> I use kernel 3.18.11-rt7 (real-time kernel )
>
> Ugh, please go get support from whome
Hello,
I have a strange behabiour with sound card usb.
I use kernel 3.18.11-rt7 (real-time kernel )
It takes 10 (!) seconds between detection of usb device till it is
registered ("registered new interface driver snd-usb-audio") in
kernel.
We take the usb device out of reset using another HW.
See
Hello,
I am developing simple loopback using gadgetfs, but I am a bit
confused as to how gadgefs knows that host initiated IN transfer.
Gadgetfs use read/write on endpoints, so as to my understanding, it can only:
1. When using "read" on OUT endpoint - accept a new transfer from host
to device.
On Mon, Feb 26, 2018 at 5:59 PM, Oliver Neukum wrote:
> Am Donnerstag, den 15.02.2018, 11:00 +0200 schrieb Ran Shalit:
>> I actually asked about DMA, because I see that it is possible to send
>> urb using DMA allocated buffers or not (coherent and non-coherent)
>> usb_buffe
Hello,
When performing usb transfer we request for maximum size of transfer,
yet another size of message (shorter or longer) might be sent from
device to host.
Are both cases (shorter/longer) legal in usb standard ?
In case both are legal:
If it is shorter, I guess there is no issue at all.
If
On Thu, Feb 22, 2018 at 10:46 AM, Krzysztof Opasiak
wrote:
>
>
> On 02/22/2018 07:53 AM, Greg KH wrote:
>>
>> On Wed, Feb 21, 2018 at 11:23:26PM +0200, Ran Shalit wrote:
>>>
>>> Hello,
>>>
>>> I am facing the following challenge:
&g
Hello,
I am facing the following challenge:
We have a camera device, and a ready drivers in the following configuration:
(1) host <--> camera
The drivers for host is a binary, i.e. source code is probably not
available, and also the protocol datasheet is probably not available.
But we need to
Hello,
I am trying to open
http://www.linux-usb.org/ for several days now, but I get the following message:
"Project web is currently offline pending the final migration of its
data to our new datacenter."
Is the information available meantime in another site ?
Thank you,
ranran
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On Fri, Feb 16, 2018 at 8:54 AM, Greg KH wrote:
> On Fri, Feb 16, 2018 at 01:00:06AM +0200, Ran Shalit wrote:
>> Hello,
>>
>> I am trying to understand article on reverse engineering usb driver,
>> published in
>> http://www.linuxjournal.com/node/7353/print (200
Hello,
I am trying to understand article on reverse engineering usb driver,
published in
http://www.linuxjournal.com/node/7353/print (2004)
I have difficulties understanding the input to the function usb_control_msg()
especially the 0x12, 0xc8 numbers.
I could not find them in the article, then t
On Thu, Feb 15, 2018 at 10:56 AM, Ran Shalit wrote:
> On Mon, Feb 12, 2018 at 2:39 PM, Oliver Neukum wrote:
>> Am Sonntag, den 11.02.2018, 22:17 +0200 schrieb Ran Shalit:
>>> On Tue, Feb 6, 2018 at 8:55 AM, Felipe Balbi
>>> wrote:
>>> >
>>
On Mon, Feb 12, 2018 at 2:39 PM, Oliver Neukum wrote:
> Am Sonntag, den 11.02.2018, 22:17 +0200 schrieb Ran Shalit:
>> On Tue, Feb 6, 2018 at 8:55 AM, Felipe Balbi
>> wrote:
>> >
>> >
>> > Hi,
>> >
>> > Ran Shalit writes:
>
On Tue, Feb 6, 2018 at 8:55 AM, Felipe Balbi
wrote:
>
> Hi,
>
> Ran Shalit writes:
>> Hello,
>>
>> I check code in:
>> https://elixir.free-electrons.com/linux/v3.3/source/drivers/usb/gadget/f_mass_storage.c
>> but I see no API usage of DMA, yet it is be
On Tue, Feb 6, 2018 at 1:35 PM, Felipe Balbi
wrote:
>
> Hi,
>
> Ran Shalit writes:
>> Hello,
>>
>> Is it possible to write a usb driver in userspace ?
>> I see that for peripheral/gadget, there is gadgetfs which can be used for
>> that.
>>
>&g
Hello,
Is it possible to write a usb driver in userspace ?
I see that for peripheral/gadget, there is gadgetfs which can be used for that.
What about host drivers ?
Can we use for example vfio (seems to be used with pci so I'm not
sure) ? Or is there another way ?
Thank you,
Ran
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Hello,
I check code in:
https://elixir.free-electrons.com/linux/v3.3/source/drivers/usb/gadget/f_mass_storage.c
but I see no API usage of DMA, yet it is being mentioned as if it is used.
Is it that DMA used in this driver ? Why can't I find any DMA APIs inside?
Thank you,
Ran
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