Changing the baudrate via barebox prompt

Changing the baudrate via barebox prompt

[Fabio Estevam]

Hi,

I am running barebox on a mx6qsabresd board and would like to know if
there is a way to change the serial baudrate via barebox prompt.

Any suggestion?

Thanks,

Fabio Estevam

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Re: Changing the baudrate via barebox prompt

[Kevin Du Huanpeng]

yes,try
console.baundrate=9600
but you may have to check if your serial driver has support this

在 2014-5-14，上午11:34，Fabio Estevam <festevam@gmail.com> 写道：

> Hi,
> 
> I am running barebox on a mx6qsabresd board and would like to know if
> there is a way to change the serial baudrate via barebox prompt.
> 
> Any suggestion?
> 
> Thanks,
> 
> Fabio Estevam
> 
> _______________________________________________
> barebox mailing list
> barebox@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/barebox

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Re: Changing the baudrate via barebox prompt

[Antony Pavlov]

On Wed, 14 May 2014 12:59:53 +0800
Kevin Du Huanpeng <u74147@gmail.com> wrote:

> yes,try
> console.baundrate=9600
> but you may have to check if your serial driver has support this

cs0.baudrate=9600

use devinfo to see all available consoles (cs0, cs1 etc).

Also if you use advanced shell then use <tab> key, e.g.

cs<tab>.bau<tab>

> 在 2014-5-14，上午11:34，Fabio Estevam <festevam@gmail.com> 写道：
> 
> > Hi,
> > 
> > I am running barebox on a mx6qsabresd board and would like to know if
> > there is a way to change the serial baudrate via barebox prompt.
> > 
> > Any suggestion?
> > 
> > Thanks,
> > 
> > Fabio Estevam
> > 
> > _______________________________________________
> > barebox mailing list
> > barebox@lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/barebox
> 
> _______________________________________________
> barebox mailing list
> barebox@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/barebox


-- 
-- 
Best regards,
  Antony Pavlov

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Re: Changing the baudrate via barebox prompt

[Holger Schurig]

Hmm, any reason why csX.baudrate isn't listed under magicvars ?

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Re: Changing the baudrate via barebox prompt

[Sascha Hauer]

On Wed, May 14, 2014 at 08:09:00AM +0200, Holger Schurig wrote:
> Hmm, any reason why csX.baudrate isn't listed under magicvars ?

These variables predate the magicvar support and nobody has ever added
it them to magicvar. It's not clear how we want to add these. Do we want
to add wildcards to the magicvar description (csX)? This gets incorrect
for some devices which can show up as mmcX or mciX depending on the way
they are registered. We could also attach the description to the device
parameter themselves which means we get descriptions for all parameters
actually registered, like

cs0.baudrate		Baudrate for the serial console
cs1.baudrate		Baudrate for the serial console
...

Sascha

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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Re: Changing the baudrate via barebox prompt

[Holger Schurig]

Hmm, i thought more that "magicvars" could also iterate over the
devices and spits out their parameter. Internally, they are different,
but from a users perspective both things do something "magical": a
simple setting of a variable does some action.

Or am I'm mixing some things up?  After all I'm still not that deep
into barebox ...

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Re: Changing the baudrate via barebox prompt

[Holger Schurig]

Here's a WIP:

index d92788a..9e639bb 100644
--- a/commands/magicvar.c
+++ b/commands/magicvar.c
@@ -5,12 +5,22 @@
 static int do_magicvar(int argc, char *argv[])
 {
        struct magicvar *m;
+       struct device_d *dev;
+       struct param_d *param;

        for (m = &__barebox_magicvar_start;
                        m != &__barebox_magicvar_end;
                        m++)
                printf("%-32s %s\n", m->name, m->description);

+       for_each_device(dev) {
+               if (!strcmp("global", dev_name(dev)))
+                       continue;
+               list_for_each_entry(param, &dev->parameters, list) {
+                       printf("%s.%s\n", dev_name(dev), param->name);
+               }
+       }
+
        return 0;
 }


However, the output lacks descriptions:

barebox:/ magicvar
...
global.login.timeout             timeout to type the password
global.model                     Product name of this hardware
global.version                   The barebox version
net.nameserver
net.domainname
cs0.baudrate
cs0.active
cs1.baudrate
cs1.active
cs2.baudrate
cs2.active
cs3.baudrate
cs3.active
cs4.baudrate
cs4.active
eth0.ipaddr
eth0.serverip
eth0.gateway
eth0.netmask
eth0.ethaddr
mmc1.probe
mmc3.probe

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Re: Changing the baudrate via barebox prompt

[Sascha Hauer]

On Wed, May 14, 2014 at 10:01:10AM +0200, Holger Schurig wrote:
> Hmm, i thought more that "magicvars" could also iterate over the
> devices and spits out their parameter. Internally, they are different,
> but from a users perspective both things do something "magical": a
> simple setting of a variable does some action.

Right now magicvars is just a compile time generated array of struct
magicvar. We could add a const char *description argument to the
dev_add_param_* functions for adding the descriptions to the parameters.

You can get the available parameters for a device with 'devinfo
<devname>', but currently there is no way to see all available
parameters for all devices. Also there can be no description attached
to a parameter. Adding this would indeed be valuable.

Sascha

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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Re: Changing the baudrate via barebox prompt

[Fabio Estevam]

On Wed, May 14, 2014 at 2:32 AM, Antony Pavlov <antonynpavlov@gmail.com> wrote:
> On Wed, 14 May 2014 12:59:53 +0800
> Kevin Du Huanpeng <u74147@gmail.com> wrote:
>
>> yes,try
>> console.baundrate=9600
>> but you may have to check if your serial driver has support this
>
> cs0.baudrate=9600
>
> use devinfo to see all available consoles (cs0, cs1 etc).

Thanks for your suggestion, Antony!

It works fine now.

Regards,

Fabio Estevam

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