Problem writing to flash with writeb()

[Gettert, Wolfram]

Thanks for the hint.

I was really blind.

Wolfram

> -----Original Message-----
> From: J B [mailto:mad_flasher at hotmail.com]
> Sent: Dienstag, 12. November 2002 20:02
> To: Wolfram.Gettert at fci.com; linux-mtd at lists.infradead.org
> Subject: Re: Problem writing to flash with writeb()
> 
> 
> 
> >   	physmap_map.map_priv_1 = (unsigned 
> >long)ioremap_nocache(WINDOW_ADDR,WINDOW_SIZE);
> >
> >	...
> >
> >	//Read Manufacturer and Device code
> >	physmap_write8(&physmap_map,0x90,physmap_map.map_priv_1);
> 
> Are you sure you want to pass physmap_map.map_priv_1 as the 
> address?  That 
> would imply that the address you are writing 0x90 to is (2 * 
> physmap_map.map_priv_1) because physmap_writeX will add 
> map->map_priv_1 to 
> whatever address you pass it.  If that is bigger than 
> WINDOW_SIZE, I don't 
> think the command will actually reach the flash chip because 
> the address 
> isn't mapped to a flash chip.  I am assuming you are using a 
> cfi compliant 
> flash chip and 0x90 is putting it into "Read Identifier 
> Codes".  Try using 0 
> for the address instead, which is what you did below.
> 
> >If I do it like this:
> >
> >	p = physmap_map.map_priv_1;
> >	p[0] = 0x90;
> 
> Looks like this is the equivalent of:
> physmap_write8(&physmap_map,0x90,0);
> 
> 
> I could be very wrong however.  I still consider myself a 
> newbie, so sorry 
> if this doesn't make any sense.  Hope it helps though.
> 
> 
> Josh
> 
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