diff options
Diffstat (limited to 'drivers/base/regmap/internal.h')
| -rw-r--r-- | drivers/base/regmap/internal.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h new file mode 100644 index 000000000000..348ff02eb93e --- /dev/null +++ b/drivers/base/regmap/internal.h @@ -0,0 +1,128 @@ +/* + * 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> + +struct regmap; +struct regcache_ops; + +struct regmap_format { + size_t buf_size; + size_t reg_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); + void (*format_val)(void *buf, unsigned int val); + unsigned int (*parse_val)(void *buf); +}; + +struct regmap { + struct mutex lock; + + 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; + +#ifdef CONFIG_DEBUG_FS + struct dentry *debugfs; +#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); + + u8 read_flag_mask; + u8 write_flag_mask; + + /* 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 */ + unsigned int cache_only:1; + /* if set, only the HW is modified not the cache */ + unsigned int cache_bypass:1; + /* if set, remember to free reg_defaults_raw */ + unsigned int cache_free:1; + + struct reg_default *reg_defaults; + const void *reg_defaults_raw; + void *cache; +}; + +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); +}; + +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); + +#ifdef CONFIG_DEBUG_FS +extern void regmap_debugfs_initcall(void); +extern void regmap_debugfs_init(struct regmap *map); +extern void regmap_debugfs_exit(struct regmap *map); +#else +static inline void regmap_debugfs_initcall(void) { } +static inline void regmap_debugfs_init(struct regmap *map) { } +static inline void regmap_debugfs_exit(struct regmap *map) { } +#endif + +/* regcache core declarations */ +int regcache_init(struct regmap *map); +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); + +unsigned int regcache_get_val(const void *base, unsigned int idx, + unsigned int word_size); +bool regcache_set_val(void *base, unsigned int idx, + unsigned int val, unsigned int word_size); +int regcache_lookup_reg(struct regmap *map, unsigned int reg); +int regcache_insert_reg(struct regmap *map, unsigned int reg, + unsigned int val); + +extern struct regcache_ops regcache_indexed_ops; +extern struct regcache_ops regcache_rbtree_ops; +extern struct regcache_ops regcache_lzo_ops; + +#endif |