Re: Elantech Touchpad Woes - Support for Elantech touchpads over i2c/SMBus still possibly missing

[Brian Kidney]

Hi all,

I have a ASUS Zenbook UX430U with the same problem. I am heading to 
BSDCan (and the FreeBSD Dev Submit as a guest) this week and could spend 
some time working on this in the hacker lounge. That said, I am new to 
FreeBSD driver code, so I could use some guidance to help me along. 
Anyone headed to the conference that might be able to lend me a hand?


Thanks,
Brian

Brian Kidney, M.Eng., P.Eng.
PGP Fingerprint: B8C9 D174 BABC 7FD8 67D0  DF84 FDEE B338 F248 A893

On 3 Jun 2018, at 2:43, Albert wrote:


Michael,

Good to know you still have plans to work on that eventually. It'd be 
much appreciated.


Looking at the source for your cyapa driver, I see you've ported it 
from the DragonFlyBSD driver (and they in turn adapted it from the 
Linux one). I should've looked into that earlier... Instead I spent 
most of my day trying to get OpenBSD running to try and follow Tom's 
hint at possible support there, but I had so many more issues along 
the way that in the end I figured "if I'm having trouble even getting 
a keyboard to work on this with my system, a touchpad will likely be 
the least of my worries."


So, I'm back to my FreeBSD CURRENT install, still no touchpad support 
(obviously). I guess I'll be doing some more research on these things 
and tinkering with what I find. Unfortunately, I'm moving overseas in 
a couple of weeks and leaving my desktop behind, which means I need to 
have this laptop in full working condition by then, so if I don't make 
any progress, I'll have to somewhat reluctantly go back to Linux for 
the time being. If/when that happens, I'll still be happy to help with 
any testing.


MfG,

- Albert

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Re: Elantech Touchpad Woes - Support for Elantech touchpads over i2c/SMBus still possibly missing

[Albert]

Michael,

Good to know you still have plans to work on that eventually. It'd be 
much appreciated.


Looking at the source for your cyapa driver, I see you've ported it from 
the DragonFlyBSD driver (and they in turn adapted it from the Linux 
one). I should've looked into that earlier... Instead I spent most of my 
day trying to get OpenBSD running to try and follow Tom's hint at 
possible support there, but I had so many more issues along the way that 
in the end I figured "if I'm having trouble even getting a keyboard to 
work on this with my system, a touchpad will likely be the least of my 
worries."


So, I'm back to my FreeBSD CURRENT install, still no touchpad support 
(obviously). I guess I'll be doing some more research on these things 
and tinkering with what I find. Unfortunately, I'm moving overseas in a 
couple of weeks and leaving my desktop behind, which means I need to 
have this laptop in full working condition by then, so if I don't make 
any progress, I'll have to somewhat reluctantly go back to Linux for the 
time being. If/when that happens, I'll still be happy to help with any 
testing.


MfG,

- Albert

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Re: Elantech Touchpad Woes - Support for Elantech touchpads over i2c/SMBus still possibly missing

[Michael Gmelin]

> On 2. Jun 2018, at 12:41, Matthias Apitz  wrote:
> 
>> On Saturday, 2 June 2018 12:26:03 CEST, Greg V  
>> wrote:
>> ...
>> cyapa is indeed not the right driver either. The "cy" is for Cypress. That's 
>> the touchpad found in e.g. the Acer C720.
>> ...
> 
> Side note:
> 
> I own three C720, they all came with Cypress TP. One was for repair at 
> Acer.com and returned with an Elantech TP. As well, there are no spare parts 
> of Cypress any more for replacement, even if the dealer claimes so, they came 
> all as Elan and I returned them.

Yeah, I ported the cyapa driver to FreeBSD, but then I gave my working cyapa 
pad to Matthias, trading it for an elan pad. I hoped to port this driver as 
well - unfortunately I didn’t find the time yet, but good to know that there is 
demand.

-m



> 
> Said this, we need support for Elan in our beloved FreeBSD.
> 
> Matthias.
> 
> 
> -- 
> Sent from my Ubuntu phone
> http://www.unixarea.de/
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Re: Elantech Touchpad Woes - Support for Elantech touchpads over i2c/SMBus still possibly missing

[Matthias Apitz]

On Saturday, 2 June 2018 12:26:03 CEST, Greg V 
 wrote:


...
cyapa is indeed not the right driver either. The "cy" is for Cypress. 
That's the touchpad found in e.g. the Acer C720.


...


Side note:

I own three C720, they all came with Cypress TP. One was for repair at 
Acer.com and returned with an Elantech TP. As well, there are no spare 
parts of Cypress any more for replacement, even if the dealer claimes so, 
they came all as Elan and I returned them.


Said this, we need support for Elan in our beloved FreeBSD.

Matthias.


--
Sent from my Ubuntu phone
http://www.unixarea.de/
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Re: Elantech Touchpad Woes - Support for Elantech touchpads over i2c/SMBus still possibly missing

[Greg V]

On Sat, Jun 2, 2018 at 3:14 AM, Albert  wrote:

Hi all,


I'd like to start out by saying that I'm a newcomer to FreeBSD, but 
I've been running Linux for years now and I'm still having a few 
issues transitioning. Despite that. I've been having a blast setting 
things up for myself, and I'm hopeful I can get this resolved soon 
enough.


I'm trying to get FreeBSD running on my laptop, an "Acer Chromebook 
14" (EDGAR), and although I've managed to overcome most of the 
problems I've faced along the way (needing to upgrade to a UEFI, 
misnamed wireless modules, video drivers not working on RELEASE nor 
STABLE), I just can't seem to get the touchpad on this thing to work.


For reference, EDGAR is an Intel Celeron N3160 SoC. Pretty much the 
only thing in it that isn't Intel are the case, the keyboard, the 
webcam and the touchpad. On Linux, the touchpad appears in _/proc_ as

[...]
and it can be seen from _lsmod_ as *elan_i2c*. The source for the 
corresponding driver can be found here: Google ChromeOS Git. 



Now on FreeBSD, it's as though it didn't even exist. Without applying 
any of the changes I've tried to get it working, here's the (verbose) 
output to _dmesg_ on FreeBSD: (vdmesg-nochanges 
). 
With the knowledge I have so far, this is to be expected, as it seems 
FreeBSD requires the *ig4* module to work with *i2c* devices. Loading 
it at boot does seem to make the buses visible, but the touchpad 
still doesn't appear (or not properly, I don't know all these codes): 
(vdmesg-ig4 
). 
The obvious solution is to enable support for elantech devices with 
_hw.psm.elantech_support_, but nada: (vdmesg-elantech 
). 
The only difference is _sysctl_ shows that option is enabled. Aside 
from that, it seems I'm not the only one who's had this sort of issue 
before, so support has been worked on and is claimed to be working. 
Loading the recommended cyapa and chromebook_platform modules at boot 
does not fix this issue: (vdmesg-chromebook 
). 
The reason appears, at least to me, to be that the cyapa driver isn't 
a proper elan driver. These are /different/ devices.


I'm determined to get this working /somehow/, so any help would be 
appreciated. It feels like there's a solution here somewhere and I'm 
either too dumb to find it or it's just not there quite yet. If it's 
the latter, I'm willing to put some work into porting the right 
driver with a little guidance. (I have plenty of experience with C 
but none of this driver stuff.)


Hi! hw.psm.elantech_support is not the solution. hw.psm... psm means 
PS/2 Mouse. This is for PS/2 Elantech touchpads.


cyapa is indeed not the right driver either. The "cy" is for Cypress. 
That's the touchpad found in e.g. the Acer C720.


So there's no support for your touchpad right now.

OpenBSD has HID over i2c support: https://man.openbsd.org/imt -- you 
could try porting that...


Also, should be possible to add i2c support to webcamd I guess, that 
would get the Linux driver running in userspace.

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Elantech Touchpad Woes - Support for Elantech touchpads over i2c/SMBus still possibly missing

[Albert]

Hi all,


I'd like to start out by saying that I'm a newcomer to FreeBSD, but I've 
been running Linux for years now and I'm still having a few issues 
transitioning. Despite that. I've been having a blast setting things up 
for myself, and I'm hopeful I can get this resolved soon enough.


I'm trying to get FreeBSD running on my laptop, an "Acer Chromebook 14" 
(EDGAR), and although I've managed to overcome most of the problems I've 
faced along the way (needing to upgrade to a UEFI, misnamed wireless 
modules, video drivers not working on RELEASE nor STABLE), I just can't 
seem to get the touchpad on this thing to work.


For reference, EDGAR is an Intel Celeron N3160 SoC. Pretty much the only 
thing in it that isn't Intel are the case, the keyboard, the webcam and 
the touchpad. On Linux, the touchpad appears in _/proc_ as


I: Bus=0018 Vendor=04f3 Product=0055 Version=
N: Name="Elan Touchpad"
P: Phys=
S: Sysfs=/devices/pci:00/808622C1:05/i2c-1/i2c-ELAN:00/input/input5
U: Uniq=
H: Handlers=mouse0 event4
B: PROP=5
B: EV=b
B: KEY=e520 1 0 0 0 0
B: ABS=66380001303

It seems _dmesg_ confirms this:

[   18.416171] input: Elan Touchpad as 
/devices/pci:00/808622C1:05/i2c-1/i2c-ELAN:00/input/input5

and it can be seen from _lsmod_ as *elan_i2c*. The source for the 
corresponding driver can be found here: Google ChromeOS Git. 



Now on FreeBSD, it's as though it didn't even exist. Without applying 
any of the changes I've tried to get it working, here's the (verbose) 
output to _dmesg_ on FreeBSD: (vdmesg-nochanges 
). 
With the knowledge I have so far, this is to be expected, as it seems 
FreeBSD requires the *ig4* module to work with *i2c* devices. Loading it 
at boot does seem to make the buses visible, but the touchpad still 
doesn't appear (or not properly, I don't know all these codes): 
(vdmesg-ig4 
). 
The obvious solution is to enable support for elantech devices with 
_hw.psm.elantech_support_, but nada: (vdmesg-elantech 
). 
The only difference is _sysctl_ shows that option is enabled. Aside from 
that, it seems I'm not the only one who's had this sort of issue before, 
so support has been worked on and is claimed to be working. Loading the 
recommended cyapa and chromebook_platform modules at boot does not fix 
this issue: (vdmesg-chromebook 
). 
The reason appears, at least to me, to be that the cyapa driver isn't a 
proper elan driver. These are /different/ devices.


I'm determined to get this working /somehow/, so any help would be 
appreciated. It feels like there's a solution here somewhere and I'm 
either too dumb to find it or it's just not there quite yet. If it's the 
latter, I'm willing to put some work into porting the right driver with 
a little guidance. (I have plenty of experience with C but none of this 
driver stuff.)



- Albert

PS. External mice are working perfectly, so it's nothing to do with the 
base install.


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