2 * Register map access API internal header
4 * Copyright 2011 Wolfson Microelectronics plc
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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.
13 #ifndef _REGMAP_INTERNAL_H
14 #define _REGMAP_INTERNAL_H
16 #include <linux/device.h>
17 #include <linux/regmap.h>
19 #include <linux/list.h>
20 #include <linux/wait.h>
25 struct regmap_debugfs_off_cache {
26 struct list_head list;
29 unsigned int base_reg;
33 struct regmap_format {
38 void (*format_write)(struct regmap *map,
39 unsigned int reg, unsigned int val);
40 void (*format_reg)(void *buf, unsigned int reg, unsigned int shift);
41 void (*format_val)(void *buf, unsigned int val, unsigned int shift);
42 unsigned int (*parse_val)(const void *buf);
43 void (*parse_inplace)(void *buf);
47 struct list_head list;
57 unsigned long spinlock_flags;
62 void *lock_arg; /* This is passed to lock/unlock functions */
65 struct device *dev; /* Device we do I/O on */
66 void *work_buf; /* Scratch buffer used to format I/O */
67 struct regmap_format format; /* Buffer format */
68 const struct regmap_bus *bus;
73 spinlock_t async_lock;
74 wait_queue_head_t async_waitq;
75 struct list_head async_list;
76 struct list_head async_free;
79 #ifdef CONFIG_DEBUG_FS
81 struct dentry *debugfs;
82 const char *debugfs_name;
84 unsigned int debugfs_reg_len;
85 unsigned int debugfs_val_len;
86 unsigned int debugfs_tot_len;
88 struct list_head debugfs_off_cache;
89 struct mutex cache_lock;
92 unsigned int max_register;
93 bool (*writeable_reg)(struct device *dev, unsigned int reg);
94 bool (*readable_reg)(struct device *dev, unsigned int reg);
95 bool (*volatile_reg)(struct device *dev, unsigned int reg);
96 bool (*precious_reg)(struct device *dev, unsigned int reg);
97 bool (*writeable_noinc_reg)(struct device *dev, unsigned int reg);
98 bool (*readable_noinc_reg)(struct device *dev, unsigned int reg);
99 const struct regmap_access_table *wr_table;
100 const struct regmap_access_table *rd_table;
101 const struct regmap_access_table *volatile_table;
102 const struct regmap_access_table *precious_table;
103 const struct regmap_access_table *wr_noinc_table;
104 const struct regmap_access_table *rd_noinc_table;
106 int (*reg_read)(void *context, unsigned int reg, unsigned int *val);
107 int (*reg_write)(void *context, unsigned int reg, unsigned int val);
108 int (*reg_update_bits)(void *context, unsigned int reg,
109 unsigned int mask, unsigned int val);
113 unsigned long read_flag_mask;
114 unsigned long write_flag_mask;
116 /* number of bits to (left) shift the reg value when formatting*/
119 int reg_stride_order;
121 /* regcache specific members */
122 const struct regcache_ops *cache_ops;
123 enum regcache_type cache_type;
125 /* number of bytes in reg_defaults_raw */
126 unsigned int cache_size_raw;
127 /* number of bytes per word in reg_defaults_raw */
128 unsigned int cache_word_size;
129 /* number of entries in reg_defaults */
130 unsigned int num_reg_defaults;
131 /* number of entries in reg_defaults_raw */
132 unsigned int num_reg_defaults_raw;
134 /* if set, only the cache is modified not the HW */
136 /* if set, only the HW is modified not the cache */
138 /* if set, remember to free reg_defaults_raw */
141 struct reg_default *reg_defaults;
142 const void *reg_defaults_raw;
144 /* if set, the cache contains newer data than the HW */
146 /* if set, the HW registers are known to match map->reg_defaults */
147 bool no_sync_defaults;
149 struct reg_sequence *patch;
152 /* if set, converts bulk read to single read */
153 bool use_single_read;
154 /* if set, converts bulk write to single write */
155 bool use_single_write;
156 /* if set, the device supports multi write mode */
157 bool can_multi_write;
159 /* if set, raw reads/writes are limited to this size */
161 size_t max_raw_write;
163 struct rb_root range_tree;
164 void *selector_work_buf; /* Scratch buffer used for selector */
166 struct hwspinlock *hwlock;
169 struct regcache_ops {
171 enum regcache_type type;
172 int (*init)(struct regmap *map);
173 int (*exit)(struct regmap *map);
174 #ifdef CONFIG_DEBUG_FS
175 void (*debugfs_init)(struct regmap *map);
177 int (*read)(struct regmap *map, unsigned int reg, unsigned int *value);
178 int (*write)(struct regmap *map, unsigned int reg, unsigned int value);
179 int (*sync)(struct regmap *map, unsigned int min, unsigned int max);
180 int (*drop)(struct regmap *map, unsigned int min, unsigned int max);
183 bool regmap_cached(struct regmap *map, unsigned int reg);
184 bool regmap_writeable(struct regmap *map, unsigned int reg);
185 bool regmap_readable(struct regmap *map, unsigned int reg);
186 bool regmap_volatile(struct regmap *map, unsigned int reg);
187 bool regmap_precious(struct regmap *map, unsigned int reg);
188 bool regmap_writeable_noinc(struct regmap *map, unsigned int reg);
189 bool regmap_readable_noinc(struct regmap *map, unsigned int reg);
191 int _regmap_write(struct regmap *map, unsigned int reg,
194 struct regmap_range_node {
199 unsigned int range_min;
200 unsigned int range_max;
202 unsigned int selector_reg;
203 unsigned int selector_mask;
206 unsigned int window_start;
207 unsigned int window_len;
210 struct regmap_field {
211 struct regmap *regmap;
217 unsigned int id_size;
218 unsigned int id_offset;
221 #ifdef CONFIG_DEBUG_FS
222 extern void regmap_debugfs_initcall(void);
223 extern void regmap_debugfs_init(struct regmap *map, const char *name);
224 extern void regmap_debugfs_exit(struct regmap *map);
226 static inline void regmap_debugfs_disable(struct regmap *map)
228 map->debugfs_disable = true;
232 static inline void regmap_debugfs_initcall(void) { }
233 static inline void regmap_debugfs_init(struct regmap *map, const char *name) { }
234 static inline void regmap_debugfs_exit(struct regmap *map) { }
235 static inline void regmap_debugfs_disable(struct regmap *map) { }
238 /* regcache core declarations */
239 int regcache_init(struct regmap *map, const struct regmap_config *config);
240 void regcache_exit(struct regmap *map);
241 int regcache_read(struct regmap *map,
242 unsigned int reg, unsigned int *value);
243 int regcache_write(struct regmap *map,
244 unsigned int reg, unsigned int value);
245 int regcache_sync(struct regmap *map);
246 int regcache_sync_block(struct regmap *map, void *block,
247 unsigned long *cache_present,
248 unsigned int block_base, unsigned int start,
251 static inline const void *regcache_get_val_addr(struct regmap *map,
255 return base + (map->cache_word_size * idx);
258 unsigned int regcache_get_val(struct regmap *map, const void *base,
260 bool regcache_set_val(struct regmap *map, void *base, unsigned int idx,
262 int regcache_lookup_reg(struct regmap *map, unsigned int reg);
264 int _regmap_raw_write(struct regmap *map, unsigned int reg,
265 const void *val, size_t val_len);
267 void regmap_async_complete_cb(struct regmap_async *async, int ret);
269 enum regmap_endian regmap_get_val_endian(struct device *dev,
270 const struct regmap_bus *bus,
271 const struct regmap_config *config);
273 extern struct regcache_ops regcache_rbtree_ops;
274 extern struct regcache_ops regcache_lzo_ops;
275 extern struct regcache_ops regcache_flat_ops;
277 static inline const char *regmap_name(const struct regmap *map)
280 return dev_name(map->dev);
285 static inline unsigned int regmap_get_offset(const struct regmap *map,
288 if (map->reg_stride_order >= 0)
289 return index << map->reg_stride_order;
291 return index * map->reg_stride;
294 static inline unsigned int regcache_get_index_by_order(const struct regmap *map,
297 return reg >> map->reg_stride_order;