ata_pio_devchk(9)
NAME
ata_pio_devchk - PATA device presence detection
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 de
- vice is present, it will respond by correctly storing and echoing
- back the ATA shadow register contents.
LOCKING
caller.
AUTHOR
- Jeff Garzik
- Author.