On 8/14/07, Alan Cox <[email protected]> wrote:
> > +/**
> > + * Register transfer timing table
> > + */
>
> Libata has a complete set of transfer mode tables and timing functions -
> any reason for not using them ?
>
After a bit investigation, I find the timing paramters difined in
struct ata_timing are different from that in hardware manual of BF548.
struct ata_timing {
unsigned short mode; /* ATA mode */
unsigned short setup; /* t1 */
unsigned short act8b; /* t2 for 8-bit I/O */
unsigned short rec8b; /* t2i for 8-bit I/O */
unsigned short cyc8b; /* t0 for 8-bit I/O */
unsigned short active; /* t2 or tD */
unsigned short recover; /* t2i or tK */
unsigned short cycle; /* t0 */
unsigned short udma; /* t2CYCTYP/2 */
};
BF548 PIO timing registers:
u8 teoc_reg;
u8 t2_reg;
u4 t4_reg;
u8 t2_pio;
u4 t1_reg;
u8 teoc_pio;
BF548 UDMA timing registers:
u8 tenv;
u8 tack;
u8 tcyc_tdvs;
u8 tdvs;
u8 tmli;
u8 tss;
u8 trp;
u8 tzah;
I can't find a simple way to configure bf548 registers with the ata_timing data.
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