aboutsummaryrefslogtreecommitdiff
path: root/drivers/ata/sata_nv.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/ata/sata_nv.c')
-rw-r--r--drivers/ata/sata_nv.c53
1 files changed, 25 insertions, 28 deletions
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index fae3841de0d..6f146061432 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -307,10 +307,10 @@ static int nv_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
static void nv_nf2_freeze(struct ata_port *ap);
static void nv_nf2_thaw(struct ata_port *ap);
+static int nv_nf2_hardreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline);
static void nv_ck804_freeze(struct ata_port *ap);
static void nv_ck804_thaw(struct ata_port *ap);
-static int nv_hardreset(struct ata_link *link, unsigned int *class,
- unsigned long deadline);
static int nv_adma_slave_config(struct scsi_device *sdev);
static int nv_adma_check_atapi_dma(struct ata_queued_cmd *qc);
static void nv_adma_qc_prep(struct ata_queued_cmd *qc);
@@ -405,17 +405,8 @@ static struct scsi_host_template nv_swncq_sht = {
.slave_configure = nv_swncq_slave_config,
};
-/* OSDL bz3352 reports that some nv controllers can't determine device
- * signature reliably and nv_hardreset is implemented to work around
- * the problem. This was reported on nf3 and it's unclear whether any
- * other controllers are affected. However, the workaround has been
- * applied to all variants and there isn't much to gain by trying to
- * find out exactly which ones are affected at this point especially
- * because NV has moved over to ahci for newer controllers.
- */
static struct ata_port_operations nv_common_ops = {
.inherits = &ata_bmdma_port_ops,
- .hardreset = nv_hardreset,
.scr_read = nv_scr_read,
.scr_write = nv_scr_write,
};
@@ -429,12 +420,22 @@ static struct ata_port_operations nv_generic_ops = {
.hardreset = ATA_OP_NULL,
};
+/* OSDL bz3352 reports that nf2/3 controllers can't determine device
+ * signature reliably. Also, the following thread reports detection
+ * failure on cold boot with the standard debouncing timing.
+ *
+ * http://thread.gmane.org/gmane.linux.ide/34098
+ *
+ * Debounce with hotplug timing and request follow-up SRST.
+ */
static struct ata_port_operations nv_nf2_ops = {
.inherits = &nv_common_ops,
.freeze = nv_nf2_freeze,
.thaw = nv_nf2_thaw,
+ .hardreset = nv_nf2_hardreset,
};
+/* CK804 finally gets hardreset right */
static struct ata_port_operations nv_ck804_ops = {
.inherits = &nv_common_ops,
.freeze = nv_ck804_freeze,
@@ -443,7 +444,7 @@ static struct ata_port_operations nv_ck804_ops = {
};
static struct ata_port_operations nv_adma_ops = {
- .inherits = &nv_common_ops,
+ .inherits = &nv_ck804_ops,
.check_atapi_dma = nv_adma_check_atapi_dma,
.sff_tf_read = nv_adma_tf_read,
@@ -467,7 +468,7 @@ static struct ata_port_operations nv_adma_ops = {
};
static struct ata_port_operations nv_swncq_ops = {
- .inherits = &nv_common_ops,
+ .inherits = &nv_generic_ops,
.qc_defer = ata_std_qc_defer,
.qc_prep = nv_swncq_qc_prep,
@@ -1553,6 +1554,17 @@ static void nv_nf2_thaw(struct ata_port *ap)
iowrite8(mask, scr_addr + NV_INT_ENABLE);
}
+static int nv_nf2_hardreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline)
+{
+ bool online;
+ int rc;
+
+ rc = sata_link_hardreset(link, sata_deb_timing_hotplug, deadline,
+ &online, NULL);
+ return online ? -EAGAIN : rc;
+}
+
static void nv_ck804_freeze(struct ata_port *ap)
{
void __iomem *mmio_base = ap->host->iomap[NV_MMIO_BAR];
@@ -1605,21 +1617,6 @@ static void nv_mcp55_thaw(struct ata_port *ap)
ata_sff_thaw(ap);
}
-static int nv_hardreset(struct ata_link *link, unsigned int *class,
- unsigned long deadline)
-{
- int rc;
-
- /* SATA hardreset fails to retrieve proper device signature on
- * some controllers. Request follow up SRST. For more info,
- * see http://bugzilla.kernel.org/show_bug.cgi?id=3352
- */
- rc = sata_sff_hardreset(link, class, deadline);
- if (rc)
- return rc;
- return -EAGAIN;
-}
-
static void nv_adma_error_handler(struct ata_port *ap)
{
struct nv_adma_port_priv *pp = ap->private_data;