ata: ide-sff: Add missing wait for ready in write function ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ata: ide: embed ata_ioports into struct ide_port and export it ...

Embedding struct ata_ioports into struct ide_port saves us an allocation.
Making it available to client drivers is necessary to give them access
to struct ata_port which is needed in the next patch.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ata: ide: Allow to set the devicename ...

To get persistent devicenames under /dev/ allow to set the
devicename from the driver instead of using "ata" unconditionally.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ata sff: set device pointer in ata port ...

This was forgotten in the last ata updates and leads to NULL
pointer dereferences.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ata: align ata command defines with kernel ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ata: split ide sff suport to separate file ...

Currently we only support oldschool IDE SFF devices. This is done
by registering a register layout struct and everything else is done
by the generic IDE SFF driver. Since modern ATA devices still use
ATA, but not the SFF interface anymore, split out the IDE SFF support
to a separate file to allow for other types of ata interfaces.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>