kernel-ark/drivers/video/sh_mobile_meram.h
Damian 7caa4342ca 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>
2011-05-23 16:06:24 +09:00

42 lines
928 B
C

#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__ */