libata: separate out ata_std_postreset() from ata_sff_postreset()
Separate out generic ATA portion from ata_sff_postreset() into
ata_std_postreset() and implement ata_sff_postreset() using the std
version.
ata_base_port_ops now has ata_std_postreset() for its postreset and
ata_sff_port_ops overrides it to ata_sff_postreset().
This change affects pdc_adma, ahci, sata_fsl and sata_sil24. pdc_adma
now specifies postreset to ata_sff_postreset() explicitly. sata_fsl
and sata_sil24 now use ata_std_postreset() which makes no difference
to them. ahci now calls ata_std_postreset() from its own postreset
method, which causes no behavior difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 9234bc0..e530bac 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -49,6 +49,7 @@
.thaw = ata_sff_thaw,
.prereset = ata_sff_prereset,
.softreset = ata_sff_softreset,
+ .postreset = ata_sff_postreset,
.error_handler = ata_sff_error_handler,
.post_internal_cmd = ata_sff_post_internal_cmd,
@@ -2032,6 +2033,41 @@
}
/**
+ * ata_sff_postreset - SFF postreset callback
+ * @link: the target SFF ata_link
+ * @classes: classes of attached devices
+ *
+ * This function is invoked after a successful reset. It first
+ * calls ata_std_postreset() and performs SFF specific postreset
+ * processing.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ */
+void ata_sff_postreset(struct ata_link *link, unsigned int *classes)
+{
+ struct ata_port *ap = link->ap;
+
+ ata_std_postreset(link, classes);
+
+ /* is double-select really necessary? */
+ if (classes[0] != ATA_DEV_NONE)
+ ap->ops->sff_dev_select(ap, 1);
+ if (classes[1] != ATA_DEV_NONE)
+ ap->ops->sff_dev_select(ap, 0);
+
+ /* bail out if no device is present */
+ if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
+ DPRINTK("EXIT, no device\n");
+ return;
+ }
+
+ /* set up device control */
+ if (ap->ioaddr.ctl_addr)
+ iowrite8(ap->ctl, ap->ioaddr.ctl_addr);
+}
+
+/**
* ata_sff_error_handler - Stock error handler for BMDMA controller
* @ap: port to handle error for
*