Commit 9f45cbd3 authored by Kristen Carlson Accardi's avatar Kristen Carlson Accardi Committed by Jeff Garzik
Browse files

[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: default avatarKristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 05d1efff
......@@ -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";
......@@ -3974,6 +3991,42 @@ static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
return err_mask;
}
/**
* 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
......
......@@ -230,6 +230,12 @@ enum {
SETFEATURES_SPINUP = 0x07, /* Spin-up drive */
SETFEATURES_SATA_ENABLE = 0x10, /* Enable use of SATA feature */
SETFEATURES_SATA_DISABLE = 0x90, /* Disable use of SATA feature */
/* SETFEATURE Sector counts for SATA features */
SATA_AN = 0x05, /* Asynchronous Notification */
/* ATAPI stuff */
ATAPI_PKT_DMA = (1 << 0),
ATAPI_DMADIR = (1 << 2), /* ATAPI data dir:
......@@ -357,6 +363,9 @@ struct ata_taskfile {
#define ata_id_queue_depth(id) (((id)[75] & 0x1f) + 1)
#define ata_id_removeable(id) ((id)[0] & (1 << 7))
#define ata_id_has_dword_io(id) ((id)[50] & (1 << 0))
#define ata_id_has_AN(id) \
( (((id)[76] != 0x0000) && ((id)[76] != 0xffff)) && \
((id)[78] & (1 << 5)) )
#define ata_id_iordy_disable(id) ((id)[49] & (1 << 10))
#define ata_id_has_iordy(id) ((id)[49] & (1 << 11))
#define ata_id_u32(id,n) \
......
......@@ -139,6 +139,7 @@ enum {
ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
ATA_DFLAG_AN = (1 << 7), /* device supports AN */
ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */
......@@ -179,6 +180,7 @@ enum {
ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
ATA_FLAG_AN = (1 << 18), /* controller supports AN */
/* The following flag belongs to ap->pflags but is kept in
* ap->flags because it's referenced in many LLDs and will be
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment