[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>
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committed by
Jeff Garzik
parent
05d1efffdc
commit
9f45cbd3f0
@@ -70,6 +70,7 @@ const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
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static unsigned int ata_dev_init_params(struct ata_device *dev,
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u16 heads, u16 sectors);
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static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
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static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable);
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static void ata_dev_xfermask(struct ata_device *dev);
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static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
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@@ -1987,6 +1988,22 @@ int ata_dev_configure(struct ata_device *dev)
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}
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dev->cdb_len = (unsigned int) rc;
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/*
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* check to see if this ATAPI device supports
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* Asynchronous Notification
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*/
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if ((ap->flags & ATA_FLAG_AN) && ata_id_has_AN(id)) {
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int err;
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/* issue SET feature command to turn this on */
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err = ata_dev_set_AN(dev, SETFEATURES_SATA_ENABLE);
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if (err)
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ata_dev_printk(dev, KERN_ERR,
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"unable to set AN, err %x\n",
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err);
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else
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dev->flags |= ATA_DFLAG_AN;
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}
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if (ata_id_cdb_intr(dev->id)) {
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dev->flags |= ATA_DFLAG_CDB_INTR;
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cdb_intr_string = ", CDB intr";
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@@ -3974,6 +3991,42 @@ static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
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return err_mask;
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}
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/**
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* ata_dev_set_AN - Issue SET FEATURES - SATA FEATURES
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* @dev: Device to which command will be sent
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* @enable: Whether to enable or disable the feature
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*
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* Issue SET FEATURES - SATA FEATURES command to device @dev
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* on port @ap with sector count set to indicate Asynchronous
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* Notification feature
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*
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* LOCKING:
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* PCI/etc. bus probe sem.
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*
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* RETURNS:
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* 0 on success, AC_ERR_* mask otherwise.
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*/
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static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable)
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{
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struct ata_taskfile tf;
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unsigned int err_mask;
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/* set up set-features taskfile */
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DPRINTK("set features - SATA features\n");
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ata_tf_init(dev, &tf);
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tf.command = ATA_CMD_SET_FEATURES;
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tf.feature = enable;
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tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
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tf.protocol = ATA_PROT_NODATA;
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tf.nsect = SATA_AN;
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err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
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DPRINTK("EXIT, err_mask=%x\n", err_mask);
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return err_mask;
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}
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/**
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* ata_dev_init_params - Issue INIT DEV PARAMS command
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* @dev: Device to which command will be sent
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