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1 | /* |
2 | * Register map access API internal header | |
3 | * | |
4 | * Copyright 2011 Wolfson Microelectronics plc | |
5 | * | |
6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #ifndef _REGMAP_INTERNAL_H | |
14 | #define _REGMAP_INTERNAL_H | |
15 | ||
16 | #include <linux/regmap.h> | |
31244e39 | 17 | #include <linux/fs.h> |
93de9124 MB |
18 | |
19 | struct regmap; | |
9fabe24e | 20 | struct regcache_ops; |
93de9124 MB |
21 | |
22 | struct regmap_format { | |
23 | size_t buf_size; | |
24 | size_t reg_bytes; | |
25 | size_t val_bytes; | |
26 | void (*format_write)(struct regmap *map, | |
27 | unsigned int reg, unsigned int val); | |
28 | void (*format_reg)(void *buf, unsigned int reg); | |
29 | void (*format_val)(void *buf, unsigned int val); | |
30 | unsigned int (*parse_val)(void *buf); | |
31 | }; | |
32 | ||
33 | struct regmap { | |
34 | struct mutex lock; | |
35 | ||
36 | struct device *dev; /* Device we do I/O on */ | |
37 | void *work_buf; /* Scratch buffer used to format I/O */ | |
38 | struct regmap_format format; /* Buffer format */ | |
39 | const struct regmap_bus *bus; | |
40 | ||
31244e39 MB |
41 | #ifdef CONFIG_DEBUG_FS |
42 | struct dentry *debugfs; | |
43 | #endif | |
44 | ||
93de9124 MB |
45 | unsigned int max_register; |
46 | bool (*writeable_reg)(struct device *dev, unsigned int reg); | |
47 | bool (*readable_reg)(struct device *dev, unsigned int reg); | |
48 | bool (*volatile_reg)(struct device *dev, unsigned int reg); | |
2efe1642 | 49 | bool (*precious_reg)(struct device *dev, unsigned int reg); |
6f306441 LPC |
50 | |
51 | u8 read_flag_mask; | |
52 | u8 write_flag_mask; | |
9fabe24e DP |
53 | |
54 | /* regcache specific members */ | |
55 | const struct regcache_ops *cache_ops; | |
56 | enum regcache_type cache_type; | |
57 | ||
58 | /* number of bytes in reg_defaults_raw */ | |
59 | unsigned int cache_size_raw; | |
60 | /* number of bytes per word in reg_defaults_raw */ | |
61 | unsigned int cache_word_size; | |
62 | /* number of entries in reg_defaults */ | |
63 | unsigned int num_reg_defaults; | |
64 | /* number of entries in reg_defaults_raw */ | |
65 | unsigned int num_reg_defaults_raw; | |
66 | ||
67 | /* if set, only the cache is modified not the HW */ | |
68 | unsigned int cache_only:1; | |
69 | /* if set, only the HW is modified not the cache */ | |
70 | unsigned int cache_bypass:1; | |
71 | /* if set, remember to free reg_defaults_raw */ | |
72 | unsigned int cache_free:1; | |
73 | ||
74 | struct reg_default *reg_defaults; | |
75 | const void *reg_defaults_raw; | |
76 | void *cache; | |
8ae0d7e8 | 77 | bool cache_dirty; |
9fabe24e DP |
78 | }; |
79 | ||
80 | struct regcache_ops { | |
81 | const char *name; | |
82 | enum regcache_type type; | |
83 | int (*init)(struct regmap *map); | |
84 | int (*exit)(struct regmap *map); | |
85 | int (*read)(struct regmap *map, unsigned int reg, unsigned int *value); | |
86 | int (*write)(struct regmap *map, unsigned int reg, unsigned int value); | |
87 | int (*sync)(struct regmap *map); | |
93de9124 MB |
88 | }; |
89 | ||
8de2f081 MB |
90 | bool regmap_writeable(struct regmap *map, unsigned int reg); |
91 | bool regmap_readable(struct regmap *map, unsigned int reg); | |
92 | bool regmap_volatile(struct regmap *map, unsigned int reg); | |
93 | bool regmap_precious(struct regmap *map, unsigned int reg); | |
94 | ||
4d2dc095 DP |
95 | int _regmap_write(struct regmap *map, unsigned int reg, |
96 | unsigned int val); | |
97 | ||
31244e39 MB |
98 | #ifdef CONFIG_DEBUG_FS |
99 | extern void regmap_debugfs_initcall(void); | |
100 | extern void regmap_debugfs_init(struct regmap *map); | |
101 | extern void regmap_debugfs_exit(struct regmap *map); | |
102 | #else | |
bbcf61ca LPC |
103 | static inline void regmap_debugfs_initcall(void) { } |
104 | static inline void regmap_debugfs_init(struct regmap *map) { } | |
105 | static inline void regmap_debugfs_exit(struct regmap *map) { } | |
31244e39 MB |
106 | #endif |
107 | ||
9fabe24e | 108 | /* regcache core declarations */ |
e5e3b8ab | 109 | int regcache_init(struct regmap *map, const struct regmap_config *config); |
9fabe24e DP |
110 | void regcache_exit(struct regmap *map); |
111 | int regcache_read(struct regmap *map, | |
112 | unsigned int reg, unsigned int *value); | |
113 | int regcache_write(struct regmap *map, | |
114 | unsigned int reg, unsigned int value); | |
115 | int regcache_sync(struct regmap *map); | |
116 | ||
117 | unsigned int regcache_get_val(const void *base, unsigned int idx, | |
118 | unsigned int word_size); | |
119 | bool regcache_set_val(void *base, unsigned int idx, | |
120 | unsigned int val, unsigned int word_size); | |
121 | int regcache_lookup_reg(struct regmap *map, unsigned int reg); | |
9fabe24e | 122 | |
28644c80 | 123 | extern struct regcache_ops regcache_rbtree_ops; |
2cbbb579 DP |
124 | extern struct regcache_ops regcache_lzo_ops; |
125 | ||
93de9124 | 126 | #endif |