diff --git a/drivers/scsi/sata_promise.h b/drivers/scsi/sata_promise.h
new file mode 100644
index 0000000..6e7e96b
--- /dev/null
+++ b/drivers/scsi/sata_promise.h
@@ -0,0 +1,154 @@
+/*
+ *  sata_promise.h - Promise SATA common definitions and inline funcs
+ *
+ *  Copyright 2003-2004 Red Hat, Inc.
+ *
+ *  The contents of this file are subject to the Open
+ *  Software License version 1.1 that can be found at
+ *  http://www.opensource.org/licenses/osl-1.1.txt and is included herein
+ *  by reference.
+ *
+ *  Alternatively, the contents of this file may be used under the terms
+ *  of the GNU General Public License version 2 (the "GPL") as distributed
+ *  in the kernel source COPYING file, in which case the provisions of
+ *  the GPL are applicable instead of the above.  If you wish to allow
+ *  the use of your version of this file only under the terms of the
+ *  GPL and not to allow others to use your version of this file under
+ *  the OSL, indicate your decision by deleting the provisions above and
+ *  replace them with the notice and other provisions required by the GPL.
+ *  If you do not delete the provisions above, a recipient may use your
+ *  version of this file under either the OSL or the GPL.
+ *
+ */
+
+#ifndef __SATA_PROMISE_H__
+#define __SATA_PROMISE_H__
+
+#include <linux/ata.h>
+
+enum pdc_packet_bits {
+	PDC_PKT_READ		= (1 << 2),
+	PDC_PKT_NODATA		= (1 << 3),
+
+	PDC_PKT_SIZEMASK	= (1 << 7) | (1 << 6) | (1 << 5),
+	PDC_PKT_CLEAR_BSY	= (1 << 4),
+	PDC_PKT_WAIT_DRDY	= (1 << 3) | (1 << 4),
+	PDC_LAST_REG		= (1 << 3),
+
+	PDC_REG_DEVCTL		= (1 << 3) | (1 << 2) | (1 << 1),
+};
+
+static inline unsigned int pdc_pkt_header(struct ata_taskfile *tf,
+					  dma_addr_t sg_table,
+					  unsigned int devno, u8 *buf)
+{
+	u8 dev_reg;
+	u32 *buf32 = (u32 *) buf;
+
+	/* set control bits (byte 0), zero delay seq id (byte 3),
+	 * and seq id (byte 2)
+	 */
+	switch (tf->protocol) {
+	case ATA_PROT_DMA:
+		if (!(tf->flags & ATA_TFLAG_WRITE))
+			buf32[0] = cpu_to_le32(PDC_PKT_READ);
+		else
+			buf32[0] = 0;
+		break;
+
+	case ATA_PROT_NODATA:
+		buf32[0] = cpu_to_le32(PDC_PKT_NODATA);
+		break;
+
+	default:
+		BUG();
+		break;
+	}
+
+	buf32[1] = cpu_to_le32(sg_table);	/* S/G table addr */
+	buf32[2] = 0;				/* no next-packet */
+
+	if (devno == 0)
+		dev_reg = ATA_DEVICE_OBS;
+	else
+		dev_reg = ATA_DEVICE_OBS | ATA_DEV1;
+
+	/* select device */
+	buf[12] = (1 << 5) | PDC_PKT_CLEAR_BSY | ATA_REG_DEVICE;
+	buf[13] = dev_reg;
+
+	/* device control register */
+	buf[14] = (1 << 5) | PDC_REG_DEVCTL;
+	buf[15] = tf->ctl;
+
+	return 16; 	/* offset of next byte */
+}
+
+static inline unsigned int pdc_pkt_footer(struct ata_taskfile *tf, u8 *buf,
+				  unsigned int i)
+{
+	if (tf->flags & ATA_TFLAG_DEVICE) {
+		buf[i++] = (1 << 5) | ATA_REG_DEVICE;
+		buf[i++] = tf->device;
+	}
+
+	/* and finally the command itself; also includes end-of-pkt marker */
+	buf[i++] = (1 << 5) | PDC_LAST_REG | ATA_REG_CMD;
+	buf[i++] = tf->command;
+
+	return i;
+}
+
+static inline unsigned int pdc_prep_lba28(struct ata_taskfile *tf, u8 *buf, unsigned int i)
+{
+	/* the "(1 << 5)" should be read "(count << 5)" */
+
+	/* ATA command block registers */
+	buf[i++] = (1 << 5) | ATA_REG_FEATURE;
+	buf[i++] = tf->feature;
+
+	buf[i++] = (1 << 5) | ATA_REG_NSECT;
+	buf[i++] = tf->nsect;
+
+	buf[i++] = (1 << 5) | ATA_REG_LBAL;
+	buf[i++] = tf->lbal;
+
+	buf[i++] = (1 << 5) | ATA_REG_LBAM;
+	buf[i++] = tf->lbam;
+
+	buf[i++] = (1 << 5) | ATA_REG_LBAH;
+	buf[i++] = tf->lbah;
+
+	return i;
+}
+
+static inline unsigned int pdc_prep_lba48(struct ata_taskfile *tf, u8 *buf, unsigned int i)
+{
+	/* the "(2 << 5)" should be read "(count << 5)" */
+
+	/* ATA command block registers */
+	buf[i++] = (2 << 5) | ATA_REG_FEATURE;
+	buf[i++] = tf->hob_feature;
+	buf[i++] = tf->feature;
+
+	buf[i++] = (2 << 5) | ATA_REG_NSECT;
+	buf[i++] = tf->hob_nsect;
+	buf[i++] = tf->nsect;
+
+	buf[i++] = (2 << 5) | ATA_REG_LBAL;
+	buf[i++] = tf->hob_lbal;
+	buf[i++] = tf->lbal;
+
+	buf[i++] = (2 << 5) | ATA_REG_LBAM;
+	buf[i++] = tf->hob_lbam;
+	buf[i++] = tf->lbam;
+
+	buf[i++] = (2 << 5) | ATA_REG_LBAH;
+	buf[i++] = tf->hob_lbah;
+	buf[i++] = tf->lbah;
+
+	return i;
+}
+
+
+#endif /* __SATA_PROMISE_H__ */