Jeff Garzik wrote: > Alan Cox wrote: >>> both the reading and writing are seriously broken. I can't tell whether >>> they end up in the wrong sectors or garbage is transferred to/from the >>> right sectors. >> >> Does this occur regardless of which interface you use (the register >> shadow or the DMA command engine ?) > > I'm curious of this as well. Oh well, I never got around to get the ADMA mode working. The sunix driver is TF/quasi-BMDMA based (w/o CONTROL register so I'm pretty sure they have some problem with LBA48). The docs[1] I have only have register description and nothing about the programming model. Me being not familiar with ADMA, my try didn't go very far. IIRC, I couldn't nudge the controller into the ADMA mode. Is ADMA some kind of standardized programming interface? Ah... another thing to note. The sata_inic162x uses 0xFF status after reset before it receives the first D2H Reg FIS from the device thus making libata believe that there's no device attached to the port. I have no idea why they had to use 0xFF for that but they did. :-( It seems we'll have to consider 0xFF a valid wait state if SCR is valid and indicates device presence. Well, that sounds like a good idea anyway. Thanks. -- tejun - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
