Provided by: linux-doc-2.6.15_2.6.15-23.39_all
ata_dev_identify - obtain IDENTIFY x DEVICE page
void ata_dev_identify (struct ata_port * ap, unsigned int device);
ap port on which device we wish to probe resides
device device bus address, starting at zero
Following bus reset, we issue the IDENTIFY [PACKET] DEVICE command, and
read back the 512-byte device information page. The device information
page is fed to us via the standard PIO-IN protocol, but we hand-code it
here. (TODO: investigate using standard PIO-IN paths)
After reading the device information page, we use several bits of
information from it to initialize data structures that will be used
during the lifetime of the ata_device. Other data from the info page is
used to disqualify certain older ATA devices we do not wish to support.
Inherited from caller. Some functions called by this function obtain
the host_set lock.