* NAND Flash, Localbus and UPM
@ 2008-07-14 14:47 Alemao
2008-07-15 6:38 ` Marco Stornelli
0 siblings, 1 reply; 2+ messages in thread
From: Alemao @ 2008-07-14 14:47 UTC (permalink / raw)
To: linuxppc-embedded
Hi all,
Im trying to use a NAND flash (NAND512W3A, from ST) in MPC8360
localbus, with UPM.
My board is based on the mpc8360erdk. I also have a NOR flash
connected in the localbus.
But I have some doubts in how to put this information at the DTS file.
Im doing this way:
soc8360@e0000000 {
.
.
.
};
localbus@e0005000 {
compatible = "fsl,mpc8360-localbus";
#address-cells = <2>;
#size-cells = <1>;
reg = <e0005000 d8>;
ranges = <0 0 ff800000 1000000 // nor flash, 16 MB
1 0 60000000 4000000>; // nand
flash, 64 MB (512 Mb)
nor-flash@0,0 {
compatible = "amd,s29glxxx", "cfi-flash";
reg = <0 0 40000>;
bank-width = <2>;
device-width = <1>;
};
nand-flash@1,0 {
compatible = "stmicro,NAND512W3A", "fsl,upm-nand";
reg = <1 0 4000000>; //reg = <1 0 1>;
width = <1>;
upm = "A";
upm-addr-offset = <16>;
upm-cmd-offset = <8>;
gpios = <4 18>;
gpio-parent = <&qe_pio>;
wait-pattern;
wait-write;
};
};
In range information:
ranges = <0 0 ff800000 1000000 // nor flash, 16 MB
1 0 60000000 4000000>; // nand flash, 64 MB (512 Mb)
i dont know what ff800000 and 60000000 means,
i got those values from some posts in the mail-list. I also searched
the datasheet and didnt find anything about those values.
The size values, 1000000 and 4000000, im using the memory density.
Is this correct? Cause i read some posts that the nand size was very
small, like 32K, seems that its something like the block size of
nand.
In reg information:
reg = <0 0 1000000>; // nor-flash
reg = <1 0 4000000>; // nand-flash
Dont know if its correct. The third argument i used the size,
but the second i dont know what value use.
In other post by Anton, i saw something like these:
upm@1,0 {
flash {
...
};
};
Should i use it?
I must confess, im really confuse about all this stuffs.
I read linux/Documentation/powerpc/booting-without-of.txt but didnt
clarify so much.
Cheers,
--
Alemao
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: NAND Flash, Localbus and UPM
2008-07-14 14:47 NAND Flash, Localbus and UPM Alemao
@ 2008-07-15 6:38 ` Marco Stornelli
0 siblings, 0 replies; 2+ messages in thread
From: Marco Stornelli @ 2008-07-15 6:38 UTC (permalink / raw)
To: Alemao; +Cc: linuxppc-embedded
Alemao ha scritto:
> Hi all,
>
> Im trying to use a NAND flash (NAND512W3A, from ST) in MPC8360
> localbus, with UPM.
> My board is based on the mpc8360erdk. I also have a NOR flash
> connected in the localbus.
>
> But I have some doubts in how to put this information at the DTS file.
> Im doing this way:
>
> soc8360@e0000000 {
> .
> .
> .
> };
>
> localbus@e0005000 {
> compatible = "fsl,mpc8360-localbus";
> #address-cells = <2>;
> #size-cells = <1>;
> reg = <e0005000 d8>;
>
> ranges = <0 0 ff800000 1000000 // nor flash, 16 MB
> 1 0 60000000 4000000>; // nand
> flash, 64 MB (512 Mb)
>
> nor-flash@0,0 {
> compatible = "amd,s29glxxx", "cfi-flash";
> reg = <0 0 40000>;
> bank-width = <2>;
> device-width = <1>;
> };
>
> nand-flash@1,0 {
> compatible = "stmicro,NAND512W3A", "fsl,upm-nand";
> reg = <1 0 4000000>; //reg = <1 0 1>;
> width = <1>;
> upm = "A";
> upm-addr-offset = <16>;
> upm-cmd-offset = <8>;
> gpios = <4 18>;
> gpio-parent = <&qe_pio>;
> wait-pattern;
> wait-write;
> };
> };
>
Maybe it'd be better:
NOR: flash@0,0 {
compatible = "amd,s29glxxx", "cfi-flash";
reg = <0 0 40000>;
bank-width = <2>;
device-width = <1>;
};
NAND: flash@1,0 {
compatible = "stmicro,NAND512W3A", fsl,upm-nand";
reg = <1 0 4000000>; //reg = <1 0 1>;
width = <1>;
upm = "A";
upm-addr-offset = <16>;
upm-cmd-offset = <8>;
gpios = <4 18>;
>
>
> In range information:
>
> ranges = <0 0 ff800000 1000000 // nor flash, 16 MB
> 1 0 60000000 4000000>; // nand flash, 64 MB (512 Mb)
>
> i dont know what ff800000 and 60000000 means,
They are the physical addresses. You have to write the addresses
according to your memory map.
> i got those values from some posts in the mail-list. I also searched
> the datasheet and didnt find anything about those values.
>
> The size values, 1000000 and 4000000, im using the memory density.
> Is this correct? Cause i read some posts that the nand size was very
> small, like 32K, seems that its something like the block size of
> nand.
>
Ok the last value is the size.
>
>
> In reg information:
>
> reg = <0 0 1000000>; // nor-flash
> reg = <1 0 4000000>; // nand-flash
>
> Dont know if its correct. The third argument i used the size,
> but the second i dont know what value use.
>
Ok, right. The second value is simply an offset.
>
>
> In other post by Anton, i saw something like these:
>
> upm@1,0 {
> flash {
> ...
> };
> };
>
>
> Should i use it?
No I think it's not needed, however, follow the instruction of
booting-without-of.txt. In this guide you can find all the nodes you can
use.
>
> I must confess, im really confuse about all this stuffs.
> I read linux/Documentation/powerpc/booting-without-of.txt but didnt
> clarify so much.
>
> Cheers,
>
> --
> Alemao
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>
--
Marco Stornelli
Embedded Software Engineer
CoRiTeL - Consorzio di Ricerca sulle Telecomunicazioni
http://www.coritel.it
marco.stornelli@coritel.it
+39 06 72582838
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2008-07-15 6:36 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2008-07-14 14:47 NAND Flash, Localbus and UPM Alemao
2008-07-15 6:38 ` Marco Stornelli
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).