/* * Register map access API internal header * * Copyright 2011 Wolfson Microelectronics plc * * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef _REGMAP_INTERNAL_H#define _REGMAP_INTERNAL_H #include <linux/regmap.h>#include <linux/fs.h>#include <linux/list.h>#include <linux/wait.h> struct regmap;struct regcache_ops; struct regmap_debugfs_off_cache {	struct list_head list;	off_t min;	off_t max;	unsigned int base_reg;	unsigned int max_reg;}; struct regmap_format {	size_t buf_size;	size_t reg_bytes;	size_t pad_bytes;	size_t val_bytes;	void (*format_write)(struct regmap *map,			     unsigned int reg, unsigned int val);	void (*format_reg)(void *buf, unsigned int reg, unsigned int shift);	void (*format_val)(void *buf, unsigned int val, unsigned int shift);	unsigned int (*parse_val)(const void *buf);	void (*parse_inplace)(void *buf);}; struct regmap_async {	struct list_head list;	struct regmap *map;	void *work_buf;}; struct regmap {	struct mutex mutex;	spinlock_t spinlock;	unsigned long spinlock_flags;	regmap_lock lock;	regmap_unlock unlock;	void *lock_arg; /* This is passed to lock/unlock functions */ 	struct device *dev; /* Device we do I/O on */	void *work_buf;     /* Scratch buffer used to format I/O */	struct regmap_format format;  /* Buffer format */	const struct regmap_bus *bus;	void *bus_context;	const char *name; 	bool async;	spinlock_t async_lock;	wait_queue_head_t async_waitq;	struct list_head async_list;	struct list_head async_free;	int async_ret; #ifdef CONFIG_DEBUG_FS	struct dentry *debugfs;	const char *debugfs_name; 	unsigned int debugfs_reg_len;	unsigned int debugfs_val_len;	unsigned int debugfs_tot_len; 	struct list_head debugfs_off_cache;	struct mutex cache_lock;#endif 	unsigned int max_register;	bool (*writeable_reg)(struct device *dev, unsigned int reg);	bool (*readable_reg)(struct device *dev, unsigned int reg);	bool (*volatile_reg)(struct device *dev, unsigned int reg);	bool (*precious_reg)(struct device *dev, unsigned int reg);	const struct regmap_access_table *wr_table;	const struct regmap_access_table *rd_table;	const struct regmap_access_table *volatile_table;	const struct regmap_access_table *precious_table; 	int (*reg_read)(void *context, unsigned int reg, unsigned int *val);	int (*reg_write)(void *context, unsigned int reg, unsigned int val); 	bool defer_caching; 	u8 read_flag_mask;	u8 write_flag_mask; 	/* number of bits to (left) shift the reg value when formatting*/	int reg_shift;	int reg_stride; 	/* regcache specific members */	const struct regcache_ops *cache_ops;	enum regcache_type cache_type; 	/* number of bytes in reg_defaults_raw */	unsigned int cache_size_raw;	/* number of bytes per word in reg_defaults_raw */	unsigned int cache_word_size;	/* number of entries in reg_defaults */	unsigned int num_reg_defaults;	/* number of entries in reg_defaults_raw */	unsigned int num_reg_defaults_raw; 	/* if set, only the cache is modified not the HW */	u32 cache_only;	/* if set, only the HW is modified not the cache */	u32 cache_bypass;	/* if set, remember to free reg_defaults_raw */	bool cache_free; 	struct reg_default *reg_defaults;	const void *reg_defaults_raw;	void *cache;	u32 cache_dirty; 	struct reg_default *patch;	int patch_regs; 	/* if set, converts bulk rw to single rw */	bool use_single_rw; 	struct rb_root range_tree;	void *selector_work_buf;	/* Scratch buffer used for selector */}; struct regcache_ops {	const char *name;	enum regcache_type type;	int (*init)(struct regmap *map);	int (*exit)(struct regmap *map);	int (*read)(struct regmap *map, unsigned int reg, unsigned int *value);	int (*write)(struct regmap *map, unsigned int reg, unsigned int value);	int (*sync)(struct regmap *map, unsigned int min, unsigned int max);	int (*drop)(struct regmap *map, unsigned int min, unsigned int max);}; bool regmap_writeable(struct regmap *map, unsigned int reg);bool regmap_readable(struct regmap *map, unsigned int reg);bool regmap_volatile(struct regmap *map, unsigned int reg);bool regmap_precious(struct regmap *map, unsigned int reg); int _regmap_write(struct regmap *map, unsigned int reg,		  unsigned int val); struct regmap_range_node {	struct rb_node node;	const char *name;	struct regmap *map; 	unsigned int range_min;	unsigned int range_max; 	unsigned int selector_reg;	unsigned int selector_mask;	int selector_shift; 	unsigned int window_start;	unsigned int window_len;}; struct regmap_field {	struct regmap *regmap;	unsigned int mask;	/* lsb */	unsigned int shift;	unsigned int reg; 	unsigned int id_size;	unsigned int id_offset;}; #ifdef CONFIG_DEBUG_FSextern void regmap_debugfs_initcall(void);extern void regmap_debugfs_init(struct regmap *map, const char *name);extern void regmap_debugfs_exit(struct regmap *map);#elsestatic inline void regmap_debugfs_initcall(void) { }static inline void regmap_debugfs_init(struct regmap *map, const char *name) { }static inline void regmap_debugfs_exit(struct regmap *map) { }#endif /* regcache core declarations */int regcache_init(struct regmap *map, const struct regmap_config *config);void regcache_exit(struct regmap *map);int regcache_read(struct regmap *map,		       unsigned int reg, unsigned int *value);int regcache_write(struct regmap *map,			unsigned int reg, unsigned int value);int regcache_sync(struct regmap *map);int regcache_sync_block(struct regmap *map, void *block,			unsigned long *cache_present,			unsigned int block_base, unsigned int start,			unsigned int end); static inline const void *regcache_get_val_addr(struct regmap *map,						const void *base,						unsigned int idx){	return base + (map->cache_word_size * idx);} unsigned int regcache_get_val(struct regmap *map, const void *base,			      unsigned int idx);bool regcache_set_val(struct regmap *map, void *base, unsigned int idx,		      unsigned int val);int regcache_lookup_reg(struct regmap *map, unsigned int reg); int _regmap_raw_write(struct regmap *map, unsigned int reg,		      const void *val, size_t val_len); void regmap_async_complete_cb(struct regmap_async *async, int ret); extern struct regcache_ops regcache_rbtree_ops;extern struct regcache_ops regcache_lzo_ops;extern struct regcache_ops regcache_flat_ops; #endif