* Serial console via USB (USBTTY) ...
@ 2021-04-01 11:19 Herbert Poetzl
2021-04-01 13:10 ` Andy Shevchenko
0 siblings, 1 reply; 5+ messages in thread
From: Herbert Poetzl @ 2021-04-01 11:19 UTC (permalink / raw)
To: u-boot
I'm trying to get a serial console via USB working on
STM32MP1 but I'm encountering some problems there ...
The u-boot README suggests to add the following config
entries to the board specific .h file:
CONFIG_USB_DEVICE
CONFIG_USB_TTY
CONFIG_USBD_HS (for high speed support)
CONFIG_SYS_CONSOLE_IS_IN_ENV
... but when doing so, I get a number of linker errors
which suggest that there is something missing:
https://pastebin.com/raw/bbpCu8jy
Marek (via IRC) suggested that this is because the
USB_TTY seems to be based on the old gadget framework
and needs to be updated to the new one.
It was also suggested that a port of the Linux serial
function driver would be a good alternative to get
CDC/ACM functionality into u-boot and that Andy might
already be working on this ...
So my questions are:
- What is currently the best/easiest approach to
get a serial console via USB working?
- Is the port from Linux in a stage that it can
be tested and/or finalized within a easonable
amount of time?
- Can I help getting this working?
Thanks in advance,
Herbert
^ permalink raw reply [flat|nested] 5+ messages in thread
* Serial console via USB (USBTTY) ...
2021-04-01 11:19 Serial console via USB (USBTTY) Herbert Poetzl
@ 2021-04-01 13:10 ` Andy Shevchenko
2021-04-01 16:17 ` Herbert Poetzl
0 siblings, 1 reply; 5+ messages in thread
From: Andy Shevchenko @ 2021-04-01 13:10 UTC (permalink / raw)
To: u-boot
On Thu, Apr 1, 2021 at 2:19 PM Herbert Poetzl <herbert@13thfloor.at> wrote:
>
>
> I'm trying to get a serial console via USB working on
> STM32MP1 but I'm encountering some problems there ...
>
> The u-boot README suggests to add the following config
> entries to the board specific .h file:
>
> CONFIG_USB_DEVICE
> CONFIG_USB_TTY
> CONFIG_USBD_HS (for high speed support)
> CONFIG_SYS_CONSOLE_IS_IN_ENV
>
> ... but when doing so, I get a number of linker errors
> which suggest that there is something missing:
> https://pastebin.com/raw/bbpCu8jy
>
> Marek (via IRC) suggested that this is because the
> USB_TTY seems to be based on the old gadget framework
> and needs to be updated to the new one.
Precisely!
> It was also suggested that a port of the Linux serial
> function driver would be a good alternative to get
> CDC/ACM functionality into u-boot and that Andy might
> already be working on this ...
I abandoned that, but I can send what I have (it still doesn't
properly work to me).
> So my questions are:
>
> - What is currently the best/easiest approach to
> get a serial console via USB working?
Create a support for it. You may consider it as there is no support.
> - Is the port from Linux in a stage that it can
> be tested and/or finalized within a easonable
> amount of time?
Not from me (I started but encountered so many issues here and there,
besides the fact that it's really time consuming).
> - Can I help getting this working?
If you do it yourself. I can help with testing on my platform.
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 5+ messages in thread
* Serial console via USB (USBTTY) ...
2021-04-01 13:10 ` Andy Shevchenko
@ 2021-04-01 16:17 ` Herbert Poetzl
2021-04-01 16:36 ` Andy Shevchenko
0 siblings, 1 reply; 5+ messages in thread
From: Herbert Poetzl @ 2021-04-01 16:17 UTC (permalink / raw)
To: u-boot
Hello Andy!
Thanks for the quick feedback!
On Thu, Apr 01, 2021 at 04:10:57PM +0300, Andy Shevchenko wrote:
> On Thu, Apr 1, 2021 at 2:19 PM Herbert Poetzl <herbert@13thfloor.at> wrote:
>> I'm trying to get a serial console via USB working on
>> STM32MP1 but I'm encountering some problems there ...
>> The u-boot README suggests to add the following config
>> entries to the board specific .h file:
>> CONFIG_USB_DEVICE
>> CONFIG_USB_TTY
>> CONFIG_USBD_HS (for high speed support)
>> CONFIG_SYS_CONSOLE_IS_IN_ENV
>> ... but when doing so, I get a number of linker errors
>> which suggest that there is something missing:
>> https://pastebin.com/raw/bbpCu8jy
>> Marek (via IRC) suggested that this is because the
>> USB_TTY seems to be based on the old gadget framework
>> and needs to be updated to the new one.
> Precisely!
Are there any examples of such a conversion or is there
some guide how to convert drivers from the 'old' framework
to the 'new' one?
>> It was also suggested that a port of the Linux serial
>> function driver would be a good alternative to get
>> CDC/ACM functionality into u-boot and that Andy might
>> already be working on this ...
> I abandoned that, but I can send what I have (it still doesn't
> properly work to me).
Would definitely be interesting to see, as it seems that
other function drivers (those are the f_* ones, as far
as I understood) seem to work just fine.
>> So my questions are:
>> - What is currently the best/easiest approach to
>> get a serial console via USB working?
> Create a support for it.
> You may consider it as there is no support.
Okay, how do I best start with that?
>> - Is the port from Linux in a stage that it can
>> be tested and/or finalized within a easonable
>> amount of time?
> Not from me (I started but encountered so many issues here and
> there, besides the fact that it's really time consuming).
I understand ...
>> - Can I help getting this working?
> If you do it yourself. I can help with testing on my platform.
Great! Thanks in advance!
Best,
Herbert
> --
> With Best Regards,
> Andy Shevchenko
^ permalink raw reply [flat|nested] 5+ messages in thread
* Serial console via USB (USBTTY) ...
2021-04-01 16:17 ` Herbert Poetzl
@ 2021-04-01 16:36 ` Andy Shevchenko
2021-04-01 18:45 ` Herbert Poetzl
0 siblings, 1 reply; 5+ messages in thread
From: Andy Shevchenko @ 2021-04-01 16:36 UTC (permalink / raw)
To: u-boot
On Thu, Apr 1, 2021 at 7:17 PM Herbert Poetzl <herbert@13thfloor.at> wrote:
>
>
> Hello Andy!
>
> Thanks for the quick feedback!
>
> On Thu, Apr 01, 2021 at 04:10:57PM +0300, Andy Shevchenko wrote:
> > On Thu, Apr 1, 2021 at 2:19 PM Herbert Poetzl <herbert@13thfloor.at> wrote:
>
>
> >> I'm trying to get a serial console via USB working on
> >> STM32MP1 but I'm encountering some problems there ...
>
> >> The u-boot README suggests to add the following config
> >> entries to the board specific .h file:
>
> >> CONFIG_USB_DEVICE
> >> CONFIG_USB_TTY
> >> CONFIG_USBD_HS (for high speed support)
> >> CONFIG_SYS_CONSOLE_IS_IN_ENV
>
> >> ... but when doing so, I get a number of linker errors
> >> which suggest that there is something missing:
> >> https://pastebin.com/raw/bbpCu8jy
>
> >> Marek (via IRC) suggested that this is because the
> >> USB_TTY seems to be based on the old gadget framework
> >> and needs to be updated to the new one.
>
> > Precisely!
>
> Are there any examples of such a conversion or is there
> some guide how to convert drivers from the 'old' framework
> to the 'new' one?
>
> >> It was also suggested that a port of the Linux serial
> >> function driver would be a good alternative to get
> >> CDC/ACM functionality into u-boot and that Andy might
> >> already be working on this ...
>
> > I abandoned that, but I can send what I have (it still doesn't
> > properly work to me).
>
> Would definitely be interesting to see, as it seems that
> other function drivers (those are the f_* ones, as far
> as I understood) seem to work just fine.
Here you are: https://github.com/andy-shev/u-boot/tree/topic/f-serial
No guarantees or anything. It's a pile of something.
Tell me when you get it, so I will remove the branch (let's say I'll
do it within 24 hours anyway).
> >> So my questions are:
>
> >> - What is currently the best/easiest approach to
> >> get a serial console via USB working?
>
> > Create a support for it.
> > You may consider it as there is no support.
>
> Okay, how do I best start with that?
Try to read the code of existing functions in U-Boot and Linux kernel?
> >> - Is the port from Linux in a stage that it can
> >> be tested and/or finalized within a easonable
> >> amount of time?
>
> > Not from me (I started but encountered so many issues here and
> > there, besides the fact that it's really time consuming).
>
> I understand ...
>
> >> - Can I help getting this working?
>
> > If you do it yourself. I can help with testing on my platform.
>
> Great! Thanks in advance!
>
> Best,
> Herbert
>
> > --
> > With Best Regards,
> > Andy Shevchenko
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 5+ messages in thread
* Serial console via USB (USBTTY) ...
2021-04-01 16:36 ` Andy Shevchenko
@ 2021-04-01 18:45 ` Herbert Poetzl
0 siblings, 0 replies; 5+ messages in thread
From: Herbert Poetzl @ 2021-04-01 18:45 UTC (permalink / raw)
To: u-boot
On Thu, Apr 01, 2021 at 07:36:14PM +0300, Andy Shevchenko wrote:
> On Thu, Apr 1, 2021 at 7:17 PM Herbert Poetzl <herbert@13thfloor.at> wrote:
>> Hello Andy!
>> Thanks for the quick feedback!
>> On Thu, Apr 01, 2021 at 04:10:57PM +0300, Andy Shevchenko wrote:
>>> On Thu, Apr 1, 2021 at 2:19 PM Herbert Poetzl <herbert@13thfloor.at> wrote:
>>>> I'm trying to get a serial console via USB working on
>>>> STM32MP1 but I'm encountering some problems there ...
>>>> The u-boot README suggests to add the following config
>>>> entries to the board specific .h file:
>>>> CONFIG_USB_DEVICE
>>>> CONFIG_USB_TTY
>>>> CONFIG_USBD_HS (for high speed support)
>>>> CONFIG_SYS_CONSOLE_IS_IN_ENV
>>>> ... but when doing so, I get a number of linker errors
>>>> which suggest that there is something missing:
>>>> https://pastebin.com/raw/bbpCu8jy
>>>> Marek (via IRC) suggested that this is because the
>>>> USB_TTY seems to be based on the old gadget framework
>>>> and needs to be updated to the new one.
>>> Precisely!
>> Are there any examples of such a conversion or is there
>> some guide how to convert drivers from the 'old' framework
>> to the 'new' one?
>>>> It was also suggested that a port of the Linux serial
>>>> function driver would be a good alternative to get
>>>> CDC/ACM functionality into u-boot and that Andy might
>>>> already be working on this ...
>>> I abandoned that, but I can send what I have (it still doesn't
>>> properly work to me).
>> Would definitely be interesting to see, as it seems that
>> other function drivers (those are the f_* ones, as far
>> as I understood) seem to work just fine.
> Here you are: https://github.com/andy-shev/u-boot/tree/topic/f-serial
> No guarantees or anything. It's a pile of something.
> Tell me when you get it, so I will remove the branch (let's say
> I'll do it within 24 hours anyway).
Got it, thanks!
>>>> So my questions are:
>>>> - What is currently the best/easiest approach to
>>>> get a serial console via USB working?
>>> Create a support for it.
>>> You may consider it as there is no support.
>> Okay, how do I best start with that?
> Try to read the code of existing functions in U-Boot and Linux
> kernel?
Yeah, is there a specific function driver which was ported
from Linux to U-Boot already or would the serial driver
be the first one?
>>>> - Is the port from Linux in a stage that it can
>>>> be tested and/or finalized within a easonable
>>>> amount of time?
>>> Not from me (I started but encountered so many issues here and
>>> there, besides the fact that it's really time consuming).
>> I understand ...
>>>> - Can I help getting this working?
>>> If you do it yourself. I can help with testing on my platform.
>> Great! Thanks in advance!
Thanks a bunch,
Herbert
>> Best,
>> Herbert
>>> --
>>> With Best Regards,
>>> Andy Shevchenko
> --
> With Best Regards,
> Andy Shevchenko
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2021-04-01 18:45 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
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2021-04-01 11:19 Serial console via USB (USBTTY) Herbert Poetzl
2021-04-01 13:10 ` Andy Shevchenko
2021-04-01 16:17 ` Herbert Poetzl
2021-04-01 16:36 ` Andy Shevchenko
2021-04-01 18:45 ` Herbert Poetzl
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