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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; | |
82159ba8 | 25 | size_t pad_bytes; |
93de9124 MB |
26 | size_t val_bytes; |
27 | void (*format_write)(struct regmap *map, | |
28 | unsigned int reg, unsigned int val); | |
d939fb9a MR |
29 | void (*format_reg)(void *buf, unsigned int reg, unsigned int shift); |
30 | void (*format_val)(void *buf, unsigned int val, unsigned int shift); | |
93de9124 MB |
31 | unsigned int (*parse_val)(void *buf); |
32 | }; | |
33 | ||
bacdbe07 SW |
34 | typedef void (*regmap_lock)(struct regmap *map); |
35 | typedef void (*regmap_unlock)(struct regmap *map); | |
36 | ||
93de9124 | 37 | struct regmap { |
bacdbe07 SW |
38 | struct mutex mutex; |
39 | spinlock_t spinlock; | |
40 | regmap_lock lock; | |
41 | regmap_unlock unlock; | |
93de9124 MB |
42 | |
43 | struct device *dev; /* Device we do I/O on */ | |
44 | void *work_buf; /* Scratch buffer used to format I/O */ | |
45 | struct regmap_format format; /* Buffer format */ | |
46 | const struct regmap_bus *bus; | |
0135bbcc | 47 | void *bus_context; |
72b39f6f | 48 | const char *name; |
93de9124 | 49 | |
31244e39 MB |
50 | #ifdef CONFIG_DEBUG_FS |
51 | struct dentry *debugfs; | |
d3c242e1 | 52 | const char *debugfs_name; |
31244e39 MB |
53 | #endif |
54 | ||
93de9124 MB |
55 | unsigned int max_register; |
56 | bool (*writeable_reg)(struct device *dev, unsigned int reg); | |
57 | bool (*readable_reg)(struct device *dev, unsigned int reg); | |
58 | bool (*volatile_reg)(struct device *dev, unsigned int reg); | |
2efe1642 | 59 | bool (*precious_reg)(struct device *dev, unsigned int reg); |
6f306441 LPC |
60 | |
61 | u8 read_flag_mask; | |
62 | u8 write_flag_mask; | |
9fabe24e | 63 | |
d939fb9a MR |
64 | /* number of bits to (left) shift the reg value when formatting*/ |
65 | int reg_shift; | |
f01ee60f | 66 | int reg_stride; |
d939fb9a | 67 | |
9fabe24e DP |
68 | /* regcache specific members */ |
69 | const struct regcache_ops *cache_ops; | |
70 | enum regcache_type cache_type; | |
71 | ||
72 | /* number of bytes in reg_defaults_raw */ | |
73 | unsigned int cache_size_raw; | |
74 | /* number of bytes per word in reg_defaults_raw */ | |
75 | unsigned int cache_word_size; | |
76 | /* number of entries in reg_defaults */ | |
77 | unsigned int num_reg_defaults; | |
78 | /* number of entries in reg_defaults_raw */ | |
79 | unsigned int num_reg_defaults_raw; | |
80 | ||
81 | /* if set, only the cache is modified not the HW */ | |
847fb6fd | 82 | u32 cache_only; |
9fabe24e | 83 | /* if set, only the HW is modified not the cache */ |
847fb6fd | 84 | u32 cache_bypass; |
9fabe24e | 85 | /* if set, remember to free reg_defaults_raw */ |
847fb6fd | 86 | bool cache_free; |
9fabe24e DP |
87 | |
88 | struct reg_default *reg_defaults; | |
89 | const void *reg_defaults_raw; | |
90 | void *cache; | |
847fb6fd | 91 | u32 cache_dirty; |
22f0d90a MB |
92 | |
93 | struct reg_default *patch; | |
94 | int patch_regs; | |
2e33caf1 AJ |
95 | |
96 | /* if set, converts bulk rw to single rw */ | |
97 | bool use_single_rw; | |
6863ca62 KG |
98 | |
99 | struct rb_root range_tree; | |
100 | void *selector_work_buf; /* Scratch buffer used for selector */ | |
9fabe24e DP |
101 | }; |
102 | ||
103 | struct regcache_ops { | |
104 | const char *name; | |
105 | enum regcache_type type; | |
106 | int (*init)(struct regmap *map); | |
107 | int (*exit)(struct regmap *map); | |
108 | int (*read)(struct regmap *map, unsigned int reg, unsigned int *value); | |
109 | int (*write)(struct regmap *map, unsigned int reg, unsigned int value); | |
ac8d91c8 | 110 | int (*sync)(struct regmap *map, unsigned int min, unsigned int max); |
93de9124 MB |
111 | }; |
112 | ||
8de2f081 MB |
113 | bool regmap_writeable(struct regmap *map, unsigned int reg); |
114 | bool regmap_readable(struct regmap *map, unsigned int reg); | |
115 | bool regmap_volatile(struct regmap *map, unsigned int reg); | |
116 | bool regmap_precious(struct regmap *map, unsigned int reg); | |
117 | ||
4d2dc095 DP |
118 | int _regmap_write(struct regmap *map, unsigned int reg, |
119 | unsigned int val); | |
120 | ||
6863ca62 KG |
121 | struct regmap_range_node { |
122 | struct rb_node node; | |
123 | ||
124 | unsigned int range_min; | |
125 | unsigned int range_max; | |
126 | ||
127 | unsigned int selector_reg; | |
128 | unsigned int selector_mask; | |
129 | int selector_shift; | |
130 | ||
131 | unsigned int window_start; | |
132 | unsigned int window_len; | |
133 | }; | |
134 | ||
31244e39 MB |
135 | #ifdef CONFIG_DEBUG_FS |
136 | extern void regmap_debugfs_initcall(void); | |
d3c242e1 | 137 | extern void regmap_debugfs_init(struct regmap *map, const char *name); |
31244e39 MB |
138 | extern void regmap_debugfs_exit(struct regmap *map); |
139 | #else | |
bbcf61ca | 140 | static inline void regmap_debugfs_initcall(void) { } |
abec95ad | 141 | static inline void regmap_debugfs_init(struct regmap *map, const char *name) { } |
bbcf61ca | 142 | static inline void regmap_debugfs_exit(struct regmap *map) { } |
31244e39 MB |
143 | #endif |
144 | ||
9fabe24e | 145 | /* regcache core declarations */ |
e5e3b8ab | 146 | int regcache_init(struct regmap *map, const struct regmap_config *config); |
9fabe24e DP |
147 | void regcache_exit(struct regmap *map); |
148 | int regcache_read(struct regmap *map, | |
149 | unsigned int reg, unsigned int *value); | |
150 | int regcache_write(struct regmap *map, | |
151 | unsigned int reg, unsigned int value); | |
152 | int regcache_sync(struct regmap *map); | |
153 | ||
154 | unsigned int regcache_get_val(const void *base, unsigned int idx, | |
155 | unsigned int word_size); | |
156 | bool regcache_set_val(void *base, unsigned int idx, | |
157 | unsigned int val, unsigned int word_size); | |
158 | int regcache_lookup_reg(struct regmap *map, unsigned int reg); | |
9fabe24e | 159 | |
28644c80 | 160 | extern struct regcache_ops regcache_rbtree_ops; |
2cbbb579 DP |
161 | extern struct regcache_ops regcache_lzo_ops; |
162 | ||
93de9124 | 163 | #endif |