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>
diff --git a/drivers/video/sh_mobile_meram.h b/drivers/video/sh_mobile_meram.h
new file mode 100644
index 0000000..82c54fb
--- /dev/null
+++ b/drivers/video/sh_mobile_meram.h
@@ -0,0 +1,41 @@
+#ifndef __sh_mobile_meram_h__
+#define __sh_mobile_meram_h__
+
+#include <linux/mutex.h>
+#include <video/sh_mobile_meram.h>
+
+/*
+ * MERAM private
+ */
+
+#define MERAM_ICB_Y 0x1
+#define MERAM_ICB_C 0x2
+
+/* MERAM cache size */
+#define SH_MOBILE_MERAM_ICB_NUM 32
+
+#define SH_MOBILE_MERAM_CACHE_OFFSET(p) ((p) >> 16)
+#define SH_MOBILE_MERAM_CACHE_SIZE(p) ((p) & 0xffff)
+
+struct sh_mobile_meram_priv {
+ void __iomem *base;
+ struct mutex lock;
+ unsigned long used_icb;
+ int used_meram_cache_regions;
+ unsigned long used_meram_cache[SH_MOBILE_MERAM_ICB_NUM];
+};
+
+int sh_mobile_meram_alloc_icb(const struct sh_mobile_meram_cfg *cfg,
+ int xres,
+ int yres,
+ unsigned int base_addr,
+ int yuv_mode,
+ int *marker_icb,
+ int *out_pitch);
+
+void sh_mobile_meram_free_icb(int marker_icb);
+
+#define SH_MOBILE_MERAM_START(ind, ab) \
+ (0xC0000000 | ((ab & 0x1) << 23) | ((ind & 0x1F) << 24))
+
+#endif /* !__sh_mobile_meram_h__ */