Merge branch 'topic/hda' into for-linus

[pandora-kernel.git] / drivers / ata / libata-sff.c

diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 8332e97..bb18415 100644 (file)
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -87,6 +87,7 @@ const struct ata_port_operations ata_bmdma32_port_ops = {
        .inherits               = &ata_bmdma_port_ops,
 
        .sff_data_xfer          = ata_sff_data_xfer32,
+       .port_start             = ata_sff_port_start32,
 };
 EXPORT_SYMBOL_GPL(ata_bmdma32_port_ops);
 
@@ -769,6 +770,9 @@ unsigned int ata_sff_data_xfer32(struct ata_device *dev, unsigned char *buf,
        void __iomem *data_addr = ap->ioaddr.data_addr;
        unsigned int words = buflen >> 2;
        int slop = buflen & 3;
+       
+       if (!(ap->pflags & ATA_PFLAG_PIO32))
+               return ata_sff_data_xfer(dev, buf, buflen, rw);
 
        /* Transfer multiple of 4 bytes */
        if (rw == READ)
@@ -2401,6 +2405,29 @@ int ata_sff_port_start(struct ata_port *ap)
 }
 EXPORT_SYMBOL_GPL(ata_sff_port_start);
 
+/**
+ *     ata_sff_port_start32 - Set port up for dma.
+ *     @ap: Port to initialize
+ *
+ *     Called just after data structures for each port are
+ *     initialized.  Allocates space for PRD table if the device
+ *     is DMA capable SFF.
+ *
+ *     May be used as the port_start() entry in ata_port_operations for
+ *     devices that are capable of 32bit PIO.
+ *
+ *     LOCKING:
+ *     Inherited from caller.
+ */
+int ata_sff_port_start32(struct ata_port *ap)
+{
+       ap->pflags |= ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE;
+       if (ap->ioaddr.bmdma_addr)
+               return ata_port_start(ap);
+       return 0;
+}
+EXPORT_SYMBOL_GPL(ata_sff_port_start32);
+
 /**
  *     ata_sff_std_ports - initialize ioaddr with standard port offsets.
  *     @ioaddr: IO address structure to be initialized