Hi, Greg, Alan, All,
On 05/18/2013 06:17 PM, Greg KH wrote:
On Sat, May 18, 2013 at 12:14:08PM -0400, Alan Stern wrote:
On Sat, 18 May 2013, Hans de Goede wrote:
But the sysfs descriptors file will just packs the
rawdescriptors one behind the other, using
usb_device->config[x].desc.wTotalLengt
First off, thanks for your helpful response! :)
On 05/18/2013 10:53 AM, Alan Stern wrote:
On Fri, 17 May 2013, Daniel Santos wrote:
Hello. I'm working on a driver for a USB to SPI bridge chip
(Microchip's MCP2210) that acts as a HID device (generic subclass). Of
course, it can be used from us
The HID protocol is a separate specification, see the usb-if.org web
site for it.
Thank you, found it! It's quite a read and I think I see where I've
gone wrong. I've made some terrible assumptions it would appear! :)
That's ok, I've had fun and learned a lot thus far.
Daniel
--
To unsubs
On Sat, May 18, 2013 at 12:14:08PM -0400, Alan Stern wrote:
> On Sat, 18 May 2013, Hans de Goede wrote:
> > But the sysfs descriptors file will just packs the
> > rawdescriptors one behind the other, using
> > usb_device->config[x].desc.wTotalLength, where as
> > userspace only sees the length adve
On Sat, 18 May 2013, Hans de Goede wrote:
> Hi All,
>
> While working on libusb's descriptor parsing code I ended up
> referencing the kernels drivers/usb/core/sysfs.c and
> drivers/usb/core/devio.c files. And I noticed a worrisome
> discrepancy.
>
> The sysfs descriptors file for a usb device,
On Sat, 18 May 2013, Hans de Goede wrote:
> Hi,
>
> As written in my mail titled: "Linux sysfs usb descriptors
> file has broken configuration length handling"
>
> I've been taking a close look at the usb sysfs handling
> code, specifically for the descriptors sysfs file.
>
> One other differen
On Fri, 17 May 2013, Daniel Santos wrote:
> Hello. I'm working on a driver for a USB to SPI bridge chip
> (Microchip's MCP2210) that acts as a HID device (generic subclass). Of
> course, it can be used from user-space via hid-generic, but I'm not
> really interested in that. I started this wor
Hi All,
While working on libusb's descriptor parsing code I ended up
referencing the kernels drivers/usb/core/sysfs.c and
drivers/usb/core/devio.c files. And I noticed a worrisome
discrepancy.
The sysfs descriptors file for a usb device, as well
as its /dev/bus/usb/xxx/yyy device node both behav
Hi,
As written in my mail titled: "Linux sysfs usb descriptors
file has broken configuration length handling"
I've been taking a close look at the usb sysfs handling
code, specifically for the descriptors sysfs file.
One other difference I've noticed is that the usbfs
code for reading the descr
