diff options
Diffstat (limited to 'drivers/ata/libata-acpi.c')
| -rw-r--r-- | drivers/ata/libata-acpi.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c index 7b740fe1721b..f2fd0dda70f2 100644 --- a/drivers/ata/libata-acpi.c +++ b/drivers/ata/libata-acpi.c @@ -600,3 +600,99 @@ int ata_acpi_exec_tfs(struct ata_port *ap) return ret; } +/** + * ata_acpi_push_id - send Identify data to drive + * @ap: the ata_port for the drive + * @ix: drive index + * + * _SDD ACPI object: for SATA mode only + * Must be after Identify (Packet) Device -- uses its data + * ATM this function never returns a failure. It is an optional + * method and if it fails for whatever reason, we should still + * just keep going. + */ +int ata_acpi_push_id(struct ata_port *ap, unsigned int ix) +{ + acpi_handle handle; + acpi_integer pcidevfn; + int err; + struct device *dev = ap->host->dev; + struct ata_device *atadev = &ap->device[ix]; + u32 dev_adr; + acpi_status status; + struct acpi_object_list input; + union acpi_object in_params[1]; + + if (noacpi) + return 0; + + if (ata_msg_probe(ap)) + ata_dev_printk(atadev, KERN_DEBUG, + "%s: ap->id: %d, ix = %d, port#: %d\n", + __FUNCTION__, ap->id, ix, ap->port_no); + + /* Don't continue if not a SATA device. */ + if (!(ap->cbl == ATA_CBL_SATA)) { + if (ata_msg_probe(ap)) + ata_dev_printk(atadev, KERN_DEBUG, + "%s: Not a SATA device\n", __FUNCTION__); + goto out; + } + + /* Don't continue if device has no _ADR method. + * _SDD is intended for known motherboard devices. */ + err = sata_get_dev_handle(dev, &handle, &pcidevfn); + if (err < 0) { + if (ata_msg_probe(ap)) + ata_dev_printk(atadev, KERN_DEBUG, + "%s: sata_get_dev_handle failed (%d\n", + __FUNCTION__, err); + goto out; + } + + /* Get this drive's _ADR info, if not already known */ + if (!atadev->obj_handle) { + dev_adr = SATA_ADR_RSVD; + err = get_sata_adr(dev, handle, pcidevfn, ix, ap, atadev, + &dev_adr); + if (err < 0 || dev_adr == SATA_ADR_RSVD || + !atadev->obj_handle) { + if (ata_msg_probe(ap)) + ata_dev_printk(atadev, KERN_DEBUG, + "%s: get_sata_adr failed: " + "err=%d, dev_adr=%u, obj_handle=0x%p\n", + __FUNCTION__, err, dev_adr, + atadev->obj_handle); + goto out; + } + } + + /* Give the drive Identify data to the drive via the _SDD method */ + /* _SDD: set up input parameters */ + input.count = 1; + input.pointer = in_params; + in_params[0].type = ACPI_TYPE_BUFFER; + in_params[0].buffer.length = sizeof(atadev->id[0] * ATA_ID_WORDS); + in_params[0].buffer.pointer = (u8 *)atadev->id; + /* Output buffer: _SDD has no output */ + + /* It's OK for _SDD to be missing too. */ + swap_buf_le16(atadev->id, ATA_ID_WORDS); + status = acpi_evaluate_object(atadev->obj_handle, "_SDD", &input, NULL); + swap_buf_le16(atadev->id, ATA_ID_WORDS); + + err = ACPI_FAILURE(status) ? -EIO : 0; + if (err < 0) { + if (ata_msg_probe(ap)) + ata_dev_printk(atadev, KERN_DEBUG, + "ata%u(%u): %s _SDD error: status = 0x%x\n", + ap->id, ap->device->devno, + __FUNCTION__, status); + } + + /* always return success */ +out: + return 0; +} + + |