sh_mobile_meram: MERAM framework for LCDC

Based on the patch by Takanari Hayama <taki@igel.co.jp>

Adds support framework necessary to use Media RAM (MERAM)
caching functionality with the LCDC.  The MERAM is accessed
through up to 4 Interconnect Buffers (ICBs).

ICB numbers and MERAM address ranges to use are specified in
by filling in the .meram_cfg member of the LCDC platform data

Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 67 insertions, 0 deletions

diff --git a/include/video/sh_mobile_meram.h b/include/video/sh_mobile_meram.h
new file mode 100644
index 000000000000..15fbb3da266f
--- /dev/null
+++ b/include/video/sh_mobile_meram.h
@@ -0,0 +1,67 @@
+#ifndef __VIDEO_SH_MOBILE_MERAM_H__
+#define __VIDEO_SH_MOBILE_MERAM_H__
+
+/* For sh_mobile_meram_info.addr_mode */
+enum {
+	SH_MOBILE_MERAM_MODE0 = 0,
+	SH_MOBILE_MERAM_MODE1
+};
+
+enum {
+	SH_MOBILE_MERAM_PF_NV = 0,
+	SH_MOBILE_MERAM_PF_RGB
+};
+
+
+struct sh_mobile_meram_priv;
+struct sh_mobile_meram_ops;
+
+struct sh_mobile_meram_info {
+	int				addr_mode;
+	struct sh_mobile_meram_ops	*ops;
+	struct sh_mobile_meram_priv	*priv;
+	struct platform_device		*pdev;
+};
+
+/* icb config */
+struct sh_mobile_meram_icb {
+	int marker_icb;		/* ICB # for Marker ICB */
+	int cache_icb;		/* ICB # for Cache ICB */
+	int meram_offset;	/* MERAM Buffer Offset to use */
+	int meram_size;		/* MERAM Buffer Size to use */
+
+	int cache_unit;		/* bytes to cache per ICB */
+};
+
+struct sh_mobile_meram_cfg {
+	struct sh_mobile_meram_icb	icb[2];
+	int				pixelformat;
+	int				current_reg;
+};
+
+struct module;
+struct sh_mobile_meram_ops {
+	struct module	*module;
+	/* register usage of meram */
+	int (*meram_register)(struct sh_mobile_meram_info *meram_dev,
+			      struct sh_mobile_meram_cfg *cfg,
+			      int xres, int yres, int pixelformat,
+			      unsigned long base_addr_y,
+			      unsigned long base_addr_c,
+			      unsigned long *icb_addr_y,
+			      unsigned long *icb_addr_c, int *pitch);
+
+	/* unregister usage of meram */
+	int (*meram_unregister)(struct sh_mobile_meram_info *meram_dev,
+				struct sh_mobile_meram_cfg *cfg);
+
+	/* update meram settings */
+	int (*meram_update)(struct sh_mobile_meram_info *meram_dev,
+			    struct sh_mobile_meram_cfg *cfg,
+			    unsigned long base_addr_y,
+			    unsigned long base_addr_c,
+			    unsigned long *icb_addr_y,
+			    unsigned long *icb_addr_c);
+};
+
+#endif /* __VIDEO_SH_MOBILE_MERAM_H__  */