X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;ds=sidebyside;f=drivers%2Fata%2Fpata_sc1200.c;h=dfecc6f964b04eea992d410a856340d839805f81;hb=b741d440a97c376af309e902eeb2f3c5673d2c92;hp=42efacf73c794d079a066125590498b162faaa1f;hpb=887125e3740283be25564bfc6fb5d24974b651ab;p=safe%2Fjmp%2Flinux-2.6

diff --git a/drivers/ata/pata_sc1200.c b/drivers/ata/pata_sc1200.c
index 42efacf..dfecc6f 100644
--- a/drivers/ata/pata_sc1200.c
+++ b/drivers/ata/pata_sc1200.c
@@ -1,8 +1,7 @@
 /*
- * New ATA layer SC1200 driver		Alan Cox <alan@redhat.com>
+ * New ATA layer SC1200 driver		Alan Cox <alan@lxorguk.ukuu.org.uk>
  *
  * TODO: Mode selection filtering
- * TODO: Can't enable second channel until ATA core has serialize
  * TODO: Needs custom DMA cleanup code
  *
  * Based very heavily on
@@ -151,7 +150,7 @@ static void sc1200_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 }
 
 /**
- *	sc1200_qc_issue_prot	-	command issue
+ *	sc1200_qc_issue		-	command issue
  *	@qc: command pending
  *
  *	Called when the libata layer is about to issue a command. We wrap
@@ -160,22 +159,47 @@ static void sc1200_set_dmamode(struct ata_port *ap, struct ata_device *adev)
  *	one MWDMA/UDMA bit.
  */
 
-static unsigned int sc1200_qc_issue_prot(struct ata_queued_cmd *qc)
+static unsigned int sc1200_qc_issue(struct ata_queued_cmd *qc)
 {
 	struct ata_port *ap = qc->ap;
 	struct ata_device *adev = qc->dev;
 	struct ata_device *prev = ap->private_data;
 
 	/* See if the DMA settings could be wrong */
-	if (adev->dma_mode != 0 && adev != prev && prev != NULL) {
+	if (ata_dma_enabled(adev) && adev != prev && prev != NULL) {
 		/* Maybe, but do the channels match MWDMA/UDMA ? */
-		if ((adev->dma_mode >= XFER_UDMA_0 && prev->dma_mode < XFER_UDMA_0) ||
-		    (adev->dma_mode < XFER_UDMA_0 && prev->dma_mode >= XFER_UDMA_0))
+		if ((ata_using_udma(adev) && !ata_using_udma(prev)) ||
+		    (ata_using_udma(prev) && !ata_using_udma(adev)))
 		    	/* Switch the mode bits */
 		    	sc1200_set_dmamode(ap, adev);
 	}
 
-	return ata_qc_issue_prot(qc);
+	return ata_sff_qc_issue(qc);
+}
+
+/**
+ *	sc1200_qc_defer	-	implement serialization
+ *	@qc: command
+ *
+ *	Serialize command issue on this controller.
+ */
+
+static int sc1200_qc_defer(struct ata_queued_cmd *qc)
+{
+	struct ata_host *host = qc->ap->host;
+	struct ata_port *alt = host->ports[1 ^ qc->ap->port_no];
+	int rc;
+
+	/* First apply the usual rules */
+	rc = ata_std_qc_defer(qc);
+	if (rc != 0)
+		return rc;
+
+	/* Now apply serialization rules. Only allow a command if the
+	   other channel state machine is idle */
+	if (alt && alt->qc_active)
+		return	ATA_DEFER_PORT;
+	return 0;
 }
 
 static struct scsi_host_template sc1200_sht = {
@@ -185,8 +209,9 @@ static struct scsi_host_template sc1200_sht = {
 
 static struct ata_port_operations sc1200_port_ops = {
 	.inherits	= &ata_bmdma_port_ops,
-	.qc_prep 	= ata_dumb_qc_prep,
-	.qc_issue	= sc1200_qc_issue_prot,
+	.qc_prep 	= ata_sff_dumb_qc_prep,
+	.qc_issue	= sc1200_qc_issue,
+	.qc_defer	= sc1200_qc_defer,
 	.cable_detect	= ata_cable_40wire,
 	.set_piomode	= sc1200_set_piomode,
 	.set_dmamode	= sc1200_set_dmamode,
@@ -205,15 +230,14 @@ static int sc1200_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
 	static const struct ata_port_info info = {
 		.flags = ATA_FLAG_SLAVE_POSS,
-		.pio_mask = 0x1f,
-		.mwdma_mask = 0x07,
-		.udma_mask = 0x07,
+		.pio_mask = ATA_PIO4,
+		.mwdma_mask = ATA_MWDMA2,
+		.udma_mask = ATA_UDMA2,
 		.port_ops = &sc1200_port_ops
 	};
-	/* Can't enable port 2 yet, see top comments */
-	const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
+	const struct ata_port_info *ppi[] = { &info, NULL };
 
-	return ata_pci_init_one(dev, ppi, &sc1200_sht, NULL);
+	return ata_pci_sff_init_one(dev, ppi, &sc1200_sht, NULL, 0);
 }
 
 static const struct pci_device_id sc1200[] = {