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 fr
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.
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 <oneu...@suse.com> 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 (cohe
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
<k.opas...@samsung.com> 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 fo
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
--
To
On Fri, Feb 16, 2018 at 8:54 AM, Greg KH <gre...@linuxfoundation.org> 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
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
On Thu, Feb 15, 2018 at 10:56 AM, Ran Shalit <ransha...@gmail.com> wrote:
> On Mon, Feb 12, 2018 at 2:39 PM, Oliver Neukum <oneu...@suse.com> wrote:
>> Am Sonntag, den 11.02.2018, 22:17 +0200 schrieb Ran Shalit:
>>> On Tue, Feb 6, 2018 at 8:55 AM, Felipe Balbi
>
On Mon, Feb 12, 2018 at 2:39 PM, Oliver Neukum <oneu...@suse.com> wrote:
> Am Sonntag, den 11.02.2018, 22:17 +0200 schrieb Ran Shalit:
>> On Tue, Feb 6, 2018 at 8:55 AM, Felipe Balbi
>> <felipe.ba...@linux.intel.com> wrote:
>> >
>> >
>> >
On Tue, Feb 6, 2018 at 8:55 AM, Felipe Balbi
<felipe.ba...@linux.intel.com> wrote:
>
> Hi,
>
> Ran Shalit <ransha...@gmail.com> writes:
>> Hello,
>>
>> I check code in:
>> https://elixir.free-electrons.com/linux/v3.3/source/drivers/usb/gadget/f_mass
On Tue, Feb 6, 2018 at 1:35 PM, Felipe Balbi
<felipe.ba...@linux.intel.com> wrote:
>
> Hi,
>
> Ran Shalit <ransha...@gmail.com> writes:
>> Hello,
>>
>> Is it possible to write a usb driver in userspace ?
>> I see that for periph
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
--
To
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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