Allwinner H5 SID

[Perier]

Friends, tell me is it possible to get the SID on the device itself?

 

With the article, read:
http://linux-sunxi.org/SID_Register_Guide

 

In my sun50i-h5.dtsi:

soc {
	sid: eeprom @ 1c14000 {
                 compatible = "allwinner, sun50i-h5-sid";
                 reg = <0x1c14000 0x400>;
    }
}

#: sunxi-fel sid
> ERROR: Allwinner USB FEL device not found!

 

As I understand it, this utility retrieves from a remote device connected in FEL mode.

But is it possible to somehow get the SID directly on the summit device?

[martinayotte]

  On 12/5/2018 at 5:14 PM, Evgeny said:

tell me is it possible to get the SID on the device itself?

Expand  

Yes ! Using the method explained in the Guide you've mentioned ...

Grab this source https://bootlin.com/pub/mirror/devmem2.c , compile it, and use this from the Guide :

d0=`./devmem2 0x01c14200 w|grep Value|sed 's/^.*: 0x/ /'`
d1=`./devmem2 0x01c14204 w|grep Value|sed 's/^.*: 0x/ /'`
d2=`./devmem2 0x01c14208 w|grep Value|sed 's/^.*: 0x/ /'`
d3=`./devmem2 0x01c1420c w|grep Value|sed 's/^.*: 0x/ /'`
echo $d0 $d1 $d2 $d3

 

[Perier]

  On 12/5/2018 at 8:43 PM, martinayotte said:

Yes ! Using the method explained in the Guide you've mentioned ...

Grab this source https://bootlin.com/pub/mirror/devmem2.c , compile it, and use this from the Guide :

d0=`./devmem2 0x01c14200 w|grep Value|sed 's/^.*: 0x/ /'`
d1=`./devmem2 0x01c14204 w|grep Value|sed 's/^.*: 0x/ /'`
d2=`./devmem2 0x01c14208 w|grep Value|sed 's/^.*: 0x/ /'`
d3=`./devmem2 0x01c1420c w|grep Value|sed 's/^.*: 0x/ /'`
echo $d0 $d1 $d2 $d3

 

Expand  

Thanks for your reply! It was very useful for me and I will definitely apply it in the future.

[t-bob]

i get bus errors on memory access for 0x01c14204 & 0x01c1420c.

 

is this expected ?

 

92C000BA 50368518

[martinayotte]

  On 12/16/2018 at 8:17 PM, t-bob said:

i get bus errors on memory access for 0x01c14204 & 0x01c1420c.

 

is this expected ? 

Expand  

Good catch !!!

 

The original file from https://bootlin.com/pub/mirror/devmem2.c is only supporting 32bits SoC, so for 64bits accesses, those 2 addresses are invalid.

I've found patches written by denix0 here : https://github.com/openembedded/meta-openembedded/tree/master/meta-oe/recipes-support/devmem2/devmem2

The first patch to apply is "devmem2-fixups-2.patch", then we can apply "0001-devmem.c-ensure-word-is-32-bit-and-add-support-for-6.patch" ...

 

Then run the following :

d0=`./devmem2 0x01c14200 l|grep Read|sed 's/^.*: 0x/ /'`
d1=`./devmem2 0x01c14208 l|grep Read|sed 's/^.*: 0x/ /'`
echo $d0 $d1

 

[t-bob]

excellent. many thanks for that. now i get this which seems like an impressive SID

 

6400462092C000BA:541500CE50368518

[t-bob]

here's the patched devmem2 if anyone needs it

devmem2-64.c