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authorKristen Carlson Accardi <kristen.c.accardi@intel.com>2007-08-15 03:57:11 -0400
committerJeff Garzik <jeff@garzik.org>2007-10-12 14:55:33 -0400
commit9f45cbd3f0fc597530aaf85cad7fe52cd63f1fd8 (patch)
tree44f9f11250f7629e7091b1532489d7a6539f758a /drivers/ata/libata-core.c
parent05d1efffdc9bf84311bb1a3c2e3db55b544ca119 (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.c53
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 };
70static unsigned int ata_dev_init_params(struct ata_device *dev, 70static unsigned int ata_dev_init_params(struct ata_device *dev,
71 u16 heads, u16 sectors); 71 u16 heads, u16 sectors);
72static unsigned int ata_dev_set_xfermode(struct ata_device *dev); 72static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
73static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable);
73static void ata_dev_xfermask(struct ata_device *dev); 74static void ata_dev_xfermask(struct ata_device *dev);
74static unsigned long ata_dev_blacklisted(const struct ata_device *dev); 75static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
75 76
@@ -1987,6 +1988,22 @@ int ata_dev_configure(struct ata_device *dev)
1987 } 1988 }
1988 dev->cdb_len = (unsigned int) rc; 1989 dev->cdb_len = (unsigned int) rc;
1989 1990
1991 /*
1992 * check to see if this ATAPI device supports
1993 * Asynchronous Notification
1994 */
1995 if ((ap->flags & ATA_FLAG_AN) && ata_id_has_AN(id)) {
1996 int err;
1997 /* issue SET feature command to turn this on */
1998 err = ata_dev_set_AN(dev, SETFEATURES_SATA_ENABLE);
1999 if (err)
2000 ata_dev_printk(dev, KERN_ERR,
2001 "unable to set AN, err %x\n",
2002 err);
2003 else
2004 dev->flags |= ATA_DFLAG_AN;
2005 }
2006
1990 if (ata_id_cdb_intr(dev->id)) { 2007 if (ata_id_cdb_intr(dev->id)) {
1991 dev->flags |= ATA_DFLAG_CDB_INTR; 2008 dev->flags |= ATA_DFLAG_CDB_INTR;
1992 cdb_intr_string = ", CDB intr"; 2009 cdb_intr_string = ", CDB intr";
@@ -3975,6 +3992,42 @@ static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
3975} 3992}
3976 3993
3977/** 3994/**
3995 * ata_dev_set_AN - Issue SET FEATURES - SATA FEATURES
3996 * @dev: Device to which command will be sent
3997 * @enable: Whether to enable or disable the feature
3998 *
3999 * Issue SET FEATURES - SATA FEATURES command to device @dev
4000 * on port @ap with sector count set to indicate Asynchronous
4001 * Notification feature
4002 *
4003 * LOCKING:
4004 * PCI/etc. bus probe sem.
4005 *
4006 * RETURNS:
4007 * 0 on success, AC_ERR_* mask otherwise.
4008 */
4009static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable)
4010{
4011 struct ata_taskfile tf;
4012 unsigned int err_mask;
4013
4014 /* set up set-features taskfile */
4015 DPRINTK("set features - SATA features\n");
4016
4017 ata_tf_init(dev, &tf);
4018 tf.command = ATA_CMD_SET_FEATURES;
4019 tf.feature = enable;
4020 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4021 tf.protocol = ATA_PROT_NODATA;
4022 tf.nsect = SATA_AN;
4023
4024 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
4025
4026 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4027 return err_mask;
4028}
4029
4030/**
3978 * ata_dev_init_params - Issue INIT DEV PARAMS command 4031 * ata_dev_init_params - Issue INIT DEV PARAMS command
3979 * @dev: Device to which command will be sent 4032 * @dev: Device to which command will be sent
3980 * @heads: Number of heads (taskfile parameter) 4033 * @heads: Number of heads (taskfile parameter)