diff options
| author | Kristen Carlson Accardi <kristen.c.accardi@intel.com> | 2007-08-15 03:57:11 -0400 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-10-12 14:55:33 -0400 |
| commit | 9f45cbd3f0fc597530aaf85cad7fe52cd63f1fd8 (patch) | |
| tree | 44f9f11250f7629e7091b1532489d7a6539f758a /drivers/ata/libata-core.c | |
| parent | 05d1efffdc9bf84311bb1a3c2e3db55b544ca119 (diff) | |
[libata] check for SATA async notify support
Check to see if an ATAPI device supports Asynchronous Notification.
If so, enable it, if the host controller supports AN.
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata/libata-core.c')
| -rw-r--r-- | drivers/ata/libata-core.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index c0f3c78a2be..9f87f7ddd48 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -70,6 +70,7 @@ const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; static unsigned int ata_dev_init_params(struct ata_device *dev, u16 heads, u16 sectors); static unsigned int ata_dev_set_xfermode(struct ata_device *dev); +static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable); static void ata_dev_xfermask(struct ata_device *dev); static unsigned long ata_dev_blacklisted(const struct ata_device *dev); @@ -1987,6 +1988,22 @@ int ata_dev_configure(struct ata_device *dev) } dev->cdb_len = (unsigned int) rc; + /* + * check to see if this ATAPI device supports + * Asynchronous Notification + */ + if ((ap->flags & ATA_FLAG_AN) && ata_id_has_AN(id)) { + int err; + /* issue SET feature command to turn this on */ + err = ata_dev_set_AN(dev, SETFEATURES_SATA_ENABLE); + if (err) + ata_dev_printk(dev, KERN_ERR, + "unable to set AN, err %x\n", + err); + else + dev->flags |= ATA_DFLAG_AN; + } + if (ata_id_cdb_intr(dev->id)) { dev->flags |= ATA_DFLAG_CDB_INTR; cdb_intr_string = ", CDB intr"; @@ -3975,6 +3992,42 @@ static unsigned int ata_dev_set_xfermode(struct ata_device *dev) } /** + * ata_dev_set_AN - Issue SET FEATURES - SATA FEATURES + * @dev: Device to which command will be sent + * @enable: Whether to enable or disable the feature + * + * Issue SET FEATURES - SATA FEATURES command to device @dev + * on port @ap with sector count set to indicate Asynchronous + * Notification feature + * + * LOCKING: + * PCI/etc. bus probe sem. + * + * RETURNS: + * 0 on success, AC_ERR_* mask otherwise. + */ +static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable) +{ + struct ata_taskfile tf; + unsigned int err_mask; + + /* set up set-features taskfile */ + DPRINTK("set features - SATA features\n"); + + ata_tf_init(dev, &tf); + tf.command = ATA_CMD_SET_FEATURES; + tf.feature = enable; + tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; + tf.protocol = ATA_PROT_NODATA; + tf.nsect = SATA_AN; + + err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); + + DPRINTK("EXIT, err_mask=%x\n", err_mask); + return err_mask; +} + +/** * ata_dev_init_params - Issue INIT DEV PARAMS command * @dev: Device to which command will be sent * @heads: Number of heads (taskfile parameter) |