X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=drivers%2Fata%2Fpata_via.c;h=57d951b11f2d840c18d92f7ed180ef7a240a386d;hb=ab77163008c596aad9624ceab190d840c0143fa8;hp=708ed144ede9175219a93f6acc499f6cd7421952;hpb=e86322f611eef95aafaf726fd3965e5b211f1985;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index 708ed144ede..681169c9c64 100644
--- a/drivers/ata/pata_via.c
+++ b/drivers/ata/pata_via.c
@@ -1,7 +1,6 @@
 /*
  * pata_via.c 	- VIA PATA for new ATA layer
  *			  (C) 2005-2006 Red Hat Inc
- *			  Alan Cox <alan@redhat.com>
  *
  *  Documentation
  *	Most chipset documentation available under NDA only
@@ -98,7 +97,8 @@ static const struct via_isa_bridge {
 	u8 rev_max;
 	u16 flags;
 } via_isa_bridges[] = {
-	{ "vx800",	PCI_DEVICE_ID_VIA_VX800,    0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
+	{ "vx800",	PCI_DEVICE_ID_VIA_VX800,    0x00, 0x2f, VIA_UDMA_133 |
+	VIA_BAD_AST | VIA_SATA_PATA },
 	{ "vt8237s",	PCI_DEVICE_ID_VIA_8237S,    0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
 	{ "vt8251",	PCI_DEVICE_ID_VIA_8251,     0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
 	{ "cx700",	PCI_DEVICE_ID_VIA_CX700,    0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST | VIA_SATA_PATA },
@@ -322,6 +322,29 @@ static void via_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 	via_do_set_mode(ap, adev, adev->dma_mode, tclock[mode], set_ast, udma[mode]);
 }
 
+/**
+ *	via_tf_load - send taskfile registers to host controller
+ *	@ap: Port to which output is sent
+ *	@tf: ATA taskfile register set
+ *
+ *	Outputs ATA taskfile to standard ATA host controller.
+ *
+ *	Note: This is to fix the internal bug of via chipsets, which
+ *	will reset the device register after changing the IEN bit on
+ *	ctl register
+ */
+static void via_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
+{
+	struct ata_taskfile tmp_tf;
+
+	if (ap->ctl != ap->last_ctl && !(tf->flags & ATA_TFLAG_DEVICE)) {
+		tmp_tf = *tf;
+		tmp_tf.flags |= ATA_TFLAG_DEVICE;
+		tf = &tmp_tf;
+	}
+	ata_sff_tf_load(ap, tf);
+}
+
 static struct scsi_host_template via_sht = {
 	ATA_BMDMA_SHT(DRV_NAME),
 };
@@ -332,6 +355,7 @@ static struct ata_port_operations via_port_ops = {
 	.set_piomode	= via_set_piomode,
 	.set_dmamode	= via_set_dmamode,
 	.prereset	= via_pre_reset,
+	.sff_tf_load	= via_tf_load,
 };
 
 static struct ata_port_operations via_port_ops_noirq = {