ata_dev_try_classify9
Parse returned ata device signature
Usage
unsigned int ata_dev_try_classify(struct ata_port * ap, unsigned int device, u8 * r_err);
Arguments
ap
ATA channel to examine
device
Device to examine (starting at zero)
r_err
Value of error register on completion
Overview
After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, an ATA/ATAPI-defined set of values is placed in the ATA shadow registers, indicating the results of device detection and diagnostics.
Select the ATA device, and read the values from the ATA shadow registers. Then parse according to the Error register value, and the spec-defined values examined by ata_dev_classify.
Locking
caller.
Returns
Device type - ATA_DEV_ATA, ATA_DEV_ATAPI or ATA_DEV_NONE.