[ts-7000] Re: DMA with SSP on TS7400

["pakorn_0608" <>]

Hi everyone.

Now,I have done with this problem.
If you were following my problem in previous all post, I have the way to solve 
it now.

I back to use ts-kernel2.4 without disable D-CACHE when i compiling kernel 
again.

The function that i use is "flush_dcache_range(addr_start,addr_end)" included 
in "<asm-arm/proc/cache.h>".

It has a bit when i compile my module for use dma.
I have to comment "flush_dcache_page(struct page *page)" in file cache.h for 
without problem if compiling.

around line - 121
It is this function:
static inline void flush_dcache_page(struct page *page)
{
        if (page->mapping && !mapping_mapped(page->mapping))
                set_bit(PG_dcache_dirty, &page->flags);
        else {
                unsigned long virt = (unsigned long)page_address(page);
                cpu_cache_clean_invalidate_range(virt, virt + PAGE_SIZE, 0);
        }
}

I can use what i wanna use now.
Thank all.
Pakorn.




--- In  "pakorn_0608" <> wrote:
>
> Hi Breton,
> 
> I'm also think that it not so good for disable D-CACHE in kernel.
> But i don't understand why i cannot use "dma_map_single".
> Is it about it doesn'e have any patch into kernel-ts11 of ts7400?
> 
> For using kernel 2.6,It's my second plan to solve with this d-cache problem 
> by using DMA-API. 
> 
> Thank for notice me about what will happen when disable d-cache,but ,i'll try 
> to dothis way for keep result of it for knowledge.
> I'll follow to use kernel 2.6 later in a few days.
> 
> My features for using kernel are
> - USB SUPPORT
>     [M] usb mass storage support
>           [*]  USB/ATA bridge support
> 
> - ATA/ATAPI/MFM/RLL...
>     [M] ATA/ATAPI/MFM/RLL support
>        - IDE, ATA and ATAPI Block devices
>          [M] Enhanced IDE/ATA...
>               [M] SCSI emulation support.
> 
> something like this.
> 
> target i have to modprobe usb-storage, ide-scsi, sd_mod, vfat
> 
> I have to use USB port connect with USB to IDE converter for using with 
> Harddisk/IDE.
> 
> Thanks again Breton
> 
> Pakorn
> 
>




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