From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from nausicaa2.coritel.it (host254-130-static.190-82-b.business.telecomitalia.it [82.190.130.254]) by ozlabs.org (Postfix) with ESMTP id 7DEBCDDF23 for ; Tue, 15 Jul 2008 16:36:33 +1000 (EST) Message-ID: <487C45F7.80504@coritel.it> Date: Tue, 15 Jul 2008 08:38:47 +0200 From: Marco Stornelli MIME-Version: 1.0 To: Alemao Subject: Re: NAND Flash, Localbus and UPM References: In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Cc: linuxppc-embedded@ozlabs.org List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 = ; > > 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