Blackfin: bfin_ppi.h: start a common PPI/EPPI header

Start unifying the PPI/EPPI peripheral structures in one place.  This
may be used by camera/video/fpga/high speed devices.
Signed-off-by: NMike Frysinger <vapier@gentoo.org>

arch/blackfin/include/asm/bfin_ppi.h

+/*
+ * bfin_ppi.h - interface to Blackfin PPIs
+ *
+ * Copyright 2005-2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __ASM_BFIN_PPI_H__
+#define __ASM_BFIN_PPI_H__
+
+#include <linux/types.h>
+
+/*
+ * All Blackfin system MMRs are padded to 32bits even if the register
+ * itself is only 16bits.  So use a helper macro to streamline this.
+ */
+#define __BFP(m) u16 m; u16 __pad_##m
+
+/*
+ * bfin ppi registers layout
+ */
+struct bfin_ppi_regs {
+	__BFP(control);
+	__BFP(status);
+	__BFP(count);
+	__BFP(delay);
+	__BFP(frame);
+};
+
+/*
+ * bfin eppi registers layout
+ */
+struct bfin_eppi_regs {
+	__BFP(status);
+	__BFP(hcount);
+	__BFP(hdelay);
+	__BFP(vcount);
+	__BFP(vdelay);
+	__BFP(frame);
+	__BFP(line);
+	__BFP(clkdiv);
+	u32 control;
+	u32 fs1w_hbl;
+	u32 fs1p_avpl;
+	u32 fs2w_lvb;
+	u32 fs2p_lavf;
+	u32 clip;
+};
+
+#endif