On 09/10/2013 01:01 PM, Mark Brown wrote:
On Mon, Sep 09, 2013 at 04:12:21PM -0500, Daniel Santos wrote:
One of my original requirements for this driver is that it is
reusable for different devices that use the MCP2210, not just my own
hardware. There are a number of ways to accomplish this
On 09/09/2013 06:06 AM, Mark Brown wrote:
On Sat, Sep 07, 2013 at 07:19:06PM -0500, Daniel Santos wrote:
So do i create an IRQ domain and then call generic_handle_irq() from
my URB complete() function? If so, which type of IRQ Domain is
appropriate for this? Unlike typical platform devices
On 09/07/2013 07:52 PM, Guenter Roeck wrote:
On 09/07/2013 05:19 PM, Daniel Santos wrote:
I've posted a number of requests for aid on this and have gotten very
little responses and none that were helpful. I have spent at least 24
hours of research time on this and just a little direction
time), but that can wait.
Any help *greatly* appreciated and thank you in advance!
Daniel
PS: If interested, my current driver here:
https://github.com/daniel-santos/mcp2210-linux. I haven't sought review
yet because I want to finish it first.
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IO drivers.
https://github.com/daniel-santos/mcp2210-linux/
Anyway, look at the spi core, I think you want to tie into the
spi_new_device() call in your usb driver, and start sending/receiving
data through the SPI interfaces the spi core provides.
I'm actually using the alternative to
On 09/02/2013 06:07 PM, Greg KH wrote:
On Mon, Sep 02, 2013 at 05:46:58PM -0500, Daniel Santos wrote:
Hello guys. I didn't get a response the last time so hopefully with
3.11 out I'll get one this time.
I need to be able to generate interrupts from a USB device driver while
ser
On 09/02/2013 06:07 PM, Greg KH wrote:
On Mon, Sep 02, 2013 at 05:46:58PM -0500, Daniel Santos wrote:
Hello guys. I didn't get a response the last time so hopefully with
3.11 out I'll get one this time.
I need to be able to generate interrupts from a USB device driver while
ser
Hello guys. I didn't get a response the last time so hopefully with
3.11 out I'll get one this time.
I need to be able to generate interrupts from a USB device driver while
servicing the complete() function of an interrupt URB. While I realize
that this may seem strange, the purpose is for a
the future as well. They are also
very nice for prototyping.
My current driver is on github:
https://github.com/daniel-santos/mcp2210-linux/
Daniel
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More m
On 06/25/2013 05:42 PM, Daniel Santos wrote:
On 06/25/2013 09:45 AM, Alan Stern wrote:
static __always_inline int init_endpoint(struct mcp2210_device *dev,
const struct usb_host_endpoint *ep)
{
int is_dir_in = !!usb_endpoint_dir_in(&ep->desc);
On 06/25/2013 09:45 AM, Alan Stern wrote:
On Mon, 24 Jun 2013, Daniel Santos wrote:
I submit an out URB (to rx my response)
No, an OUT URB transfers data _out_ from the computer to the device.
The response goes from the device _in_ to the computer.
I sure do appreciate this because I was
On 06/23/2013 09:08 PM, Alan Stern wrote:
On Sun, 23 Jun 2013, Daniel Santos wrote:
So I'm working on this MCP2210 driver which talks in 64-byte
request/response pairs using interrupt URBs (it can be used with
hid-generic, but I don't want to do that). I'm testing on a Raspb
Well, our project needs more than two USB ports, and we were looking
at the model A anyway, so maybe I should just find some nice USB hub
chip and/or PIC that uses SPI and has a good stable driver and hook
it up via the Pi's SPI interface? I know that sounds kinda stupid
when it already has the U
On 06/23/2013 01:43 PM, Greg KH wrote:
On Sun, Jun 23, 2013 at 01:13:34PM -0500, Daniel Santos wrote:
So I'm working on this MCP2210 driver which talks in 64-byte
request/response pairs using interrupt URBs (it can be used with
hid-generic, but I don't want to do that). I'
Ahh, thank you both so very much for the responses, at least I know this
isn't because of my code! :)
On 06/23/2013 02:03 PM, Gordon Hollingworth wrote:
It would be good to try it with the fiq_split branch of the kernel, that
has much better scheduling to stop split transactions from going wron
So I'm working on this MCP2210 driver which talks in 64-byte
request/response pairs using interrupt URBs (it can be used with
hid-generic, but I don't want to do that). I'm testing on a Raspberry
Pi Model B using the Raspbian 3.9.7 kernel. My usual order of things is:
I submit an out URB (to r
On 05/19/2013 10:12 AM, Alan Stern wrote:
usb_kill_urb(dev->in.int_urb);
Note that this call won't work if you are holding a spinlock.
ooh, thanks so much for that. Troubleshooting bugs that only occur upon
an unexpected failure is not fun!
Using interrupt transfers for command
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
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
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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 work from somebody else's
implementation that was a H
On 04/09/2013 02:06 PM, Robert Schwebel wrote:
On Tue, Apr 09, 2013 at 02:00:46PM -0500, Daniel Santos wrote:
Well, we don't have the $3500 for a vendor id. :( I presume that
others may do the same thing, hopefully mostly with DIY-type of
projects.
Do you know this one:
On 04/09/2013 12:07 PM, Felipe Balbi wrote:
Hi,
On Mon, Apr 08, 2013 at 03:59:00PM -0500, Daniel Santos wrote:
My bother & I are working on a project where we're planning on using
these inexpensive Microchip MCP2210 USB to SPI bridge w/ GPIO
devices. Mathew King at Trilithic started
On 04/09/2013 12:15 AM, Greg KH wrote:
On Mon, Apr 08, 2013 at 03:59:00PM -0500, Daniel Santos wrote:
1. Discover that the kernel already contains an abstraction layer
for an x to SPI bridge device and that I just need to write an
MCP2210 driver for it!
We have lots of SPI drivers in the
ignoring userspace options via generic-hid (there is already a
user-space library for using this chip --
https://github.com/kerrydwong/MCP2210-Library). If somebody strongly
feels that there's merit to doing this from userspace, please speak up. :)
Other options, opinions and/or advice would be g
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