ATA_PIO_DEVCHK

Section: (9)
Updated: 09 October 2005
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NAME

ata_pio_devchk - PATA device presence detection

SYNOPSIS

"SYNOPSIS"

unsigned int ata_pio_devchk (struct ata_port * ap, unsigned int device);

ARGUMENTS

ap: ATA channel to examine
device: Device to examine (starting at zero)

DESCRIPTION

This technique was originally described in Hale Landis's ATADRVR (www.ata-atapi.com), and later found its way into the ATA/ATAPI spec.

Write a pattern to the ATA shadow registers, and if a device is present, it will respond by correctly storing and echoing back the ATA shadow register contents.

LOCKING

caller.

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Time: 00:01:56 GMT, October 09, 2005