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Commit 6dae44f9 authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz
Browse files

ata: add ata_id_pio_need_iordy() helper (v2) 



v2:
Minor fixes per Sergei's review.

Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 79ca743f

include/linux/ata.h

+14 −0
Original line number Diff line number Diff line
@@ -800,6 +800,20 @@ static inline int ata_id_is_ssd(const u16 *id) 
	return id[ATA_ID_ROT_SPEED] == 0x01;

}



static inline int ata_id_pio_need_iordy(const u16 *id, const u8 pio)

{

	/* CF spec. r4.1 Table 22 says no IORDY on PIO5 and PIO6. */

	if (pio > 4 && ata_id_is_cfa(id))

		return 0;

	/* For PIO3 and higher it is mandatory. */

	if (pio > 2)

		return 1;

	/* Turn it on when possible. */

	if (ata_id_has_iordy(id))

		return 1;

	return 0;

}



static inline int ata_drive_40wire(const u16 *dev_id)

{

	if (ata_id_is_sata(dev_id))