Based on Sergei's older work on IDE hpt366 host driver.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
drivers/ata/pata_hpt366.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
Index: b/drivers/ata/pata_hpt366.c
===================================================================
--- a/drivers/ata/pata_hpt366.c
+++ b/drivers/ata/pata_hpt366.c
@@ -204,6 +204,37 @@ static int hpt36x_cable_detect(struct at
return ATA_CBL_PATA80;
}
+/**
+ * hpt36x_prereset - perform reset handling
+ * @link: ATA link to reset
+ * @deadline: deadline jiffies for the operation
+ *
+ * Perform the initial reset handling for the HPT36x.
+ */
+
+static int hpt36x_prereset(struct ata_link *link, unsigned long deadline)
+{
+ static const struct pci_bits hpt36x_enable_bits[] = {
+ { 0x50, 1, 0x10, 0x10 },
+ { 0x50, 1, 0x20, 0x20 }
+ };
+
+ struct ata_port *ap = link->ap;
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+
+ /*
+ * HPT36x chips have one channel per function and have
+ * both channel enable bits located differently and visible
+ * to both functions -- really stupid design decision... :-(
+ * Bit 4 is for the primary channel, bit 5 for the secondary.
+ */
+ if (!pci_test_config_bits(pdev,
+ &hpt36x_enable_bits[PCI_FUNC(pdev->devfn) & 1]))
+ return -ENOENT;
+
+ return ata_sff_prereset(link, deadline);
+}
+
static void hpt366_set_mode(struct ata_port *ap, struct ata_device *adev,
u8 mode)
{
@@ -284,6 +315,7 @@ static struct scsi_host_template hpt36x_
static struct ata_port_operations hpt366_port_ops = {
.inherits = &ata_bmdma32_port_ops,
+ .prereset = hpt36x_prereset,
.cable_detect = hpt36x_cable_detect,
.mode_filter = hpt366_filter,
.set_piomode = hpt366_set_piomode,
--
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