diff options
Diffstat (limited to 'drivers/ata/libata-transport.c')
| -rw-r--r-- | drivers/ata/libata-transport.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/ata/libata-transport.c b/drivers/ata/libata-transport.c index 4162d625fc92..ca129854a88c 100644 --- a/drivers/ata/libata-transport.c +++ b/drivers/ata/libata-transport.c @@ -321,6 +321,36 @@ int ata_tport_add(struct device *parent, return error; } +/** + * ata_port_classify - determine device type based on ATA-spec signature + * @ap: ATA port device on which the classification should be run + * @tf: ATA taskfile register set for device to be identified + * + * A wrapper around ata_dev_classify() to provide additional logging + * + * RETURNS: + * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP, + * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure. + */ +unsigned int ata_port_classify(struct ata_port *ap, + const struct ata_taskfile *tf) +{ + int i; + unsigned int class = ata_dev_classify(tf); + + /* Start with index '1' to skip the 'unknown' entry */ + for (i = 1; i < ARRAY_SIZE(ata_class_names); i++) { + if (ata_class_names[i].value == class) { + ata_port_dbg(ap, "found %s device by sig\n", + ata_class_names[i].name); + return class; + } + } + + ata_port_info(ap, "found unknown device (class %u)\n", class); + return class; +} +EXPORT_SYMBOL_GPL(ata_port_classify); /* * ATA link attributes |