1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Register map access API internal header
5 * Copyright 2011 Wolfson Microelectronics plc
10 #ifndef _REGMAP_INTERNAL_H
11 #define _REGMAP_INTERNAL_H
13 #include <linux/device.h>
14 #include <linux/regmap.h>
16 #include <linux/list.h>
17 #include <linux/wait.h>
22 struct regmap_debugfs_off_cache {
23 struct list_head list;
26 unsigned int base_reg;
30 struct regmap_format {
36 void (*format_write)(struct regmap *map,
37 unsigned int reg, unsigned int val);
38 void (*format_reg)(void *buf, unsigned int reg, unsigned int shift);
39 void (*format_val)(void *buf, unsigned int val, unsigned int shift);
40 unsigned int (*parse_val)(const void *buf);
41 void (*parse_inplace)(void *buf);
45 struct list_head list;
55 unsigned long spinlock_flags;
58 raw_spinlock_t raw_spinlock;
59 unsigned long raw_spinlock_flags;
64 void *lock_arg; /* This is passed to lock/unlock functions */
66 unsigned int reg_base;
68 struct device *dev; /* Device we do I/O on */
69 void *work_buf; /* Scratch buffer used to format I/O */
70 struct regmap_format format; /* Buffer format */
71 const struct regmap_bus *bus;
76 spinlock_t async_lock;
77 wait_queue_head_t async_waitq;
78 struct list_head async_list;
79 struct list_head async_free;
82 #ifdef CONFIG_DEBUG_FS
84 struct dentry *debugfs;
85 const char *debugfs_name;
87 unsigned int debugfs_reg_len;
88 unsigned int debugfs_val_len;
89 unsigned int debugfs_tot_len;
91 struct list_head debugfs_off_cache;
92 struct mutex cache_lock;
95 unsigned int max_register;
96 bool (*writeable_reg)(struct device *dev, unsigned int reg);
97 bool (*readable_reg)(struct device *dev, unsigned int reg);
98 bool (*volatile_reg)(struct device *dev, unsigned int reg);
99 bool (*precious_reg)(struct device *dev, unsigned int reg);
100 bool (*writeable_noinc_reg)(struct device *dev, unsigned int reg);
101 bool (*readable_noinc_reg)(struct device *dev, unsigned int reg);
102 const struct regmap_access_table *wr_table;
103 const struct regmap_access_table *rd_table;
104 const struct regmap_access_table *volatile_table;
105 const struct regmap_access_table *precious_table;
106 const struct regmap_access_table *wr_noinc_table;
107 const struct regmap_access_table *rd_noinc_table;
109 int (*reg_read)(void *context, unsigned int reg, unsigned int *val);
110 int (*reg_write)(void *context, unsigned int reg, unsigned int val);
111 int (*reg_update_bits)(void *context, unsigned int reg,
112 unsigned int mask, unsigned int val);
113 /* Bulk read/write */
114 int (*read)(void *context, const void *reg_buf, size_t reg_size,
115 void *val_buf, size_t val_size);
116 int (*write)(void *context, const void *data, size_t count);
120 unsigned long read_flag_mask;
121 unsigned long write_flag_mask;
123 /* number of bits to (left) shift the reg value when formatting*/
126 int reg_stride_order;
128 /* If set, will always write field to HW. */
129 bool force_write_field;
131 /* regcache specific members */
132 const struct regcache_ops *cache_ops;
133 enum regcache_type cache_type;
135 /* number of bytes in reg_defaults_raw */
136 unsigned int cache_size_raw;
137 /* number of bytes per word in reg_defaults_raw */
138 unsigned int cache_word_size;
139 /* number of entries in reg_defaults */
140 unsigned int num_reg_defaults;
141 /* number of entries in reg_defaults_raw */
142 unsigned int num_reg_defaults_raw;
144 /* if set, only the cache is modified not the HW */
146 /* if set, only the HW is modified not the cache */
148 /* if set, remember to free reg_defaults_raw */
151 struct reg_default *reg_defaults;
152 const void *reg_defaults_raw;
154 /* if set, the cache contains newer data than the HW */
156 /* if set, the HW registers are known to match map->reg_defaults */
157 bool no_sync_defaults;
159 struct reg_sequence *patch;
162 /* if set, converts bulk read to single read */
163 bool use_single_read;
164 /* if set, converts bulk write to single write */
165 bool use_single_write;
166 /* if set, the device supports multi write mode */
167 bool can_multi_write;
169 /* if set, raw reads/writes are limited to this size */
171 size_t max_raw_write;
173 struct rb_root range_tree;
174 void *selector_work_buf; /* Scratch buffer used for selector */
176 struct hwspinlock *hwlock;
178 /* if set, the regmap core can sleep */
182 struct regcache_ops {
184 enum regcache_type type;
185 int (*init)(struct regmap *map);
186 int (*exit)(struct regmap *map);
187 #ifdef CONFIG_DEBUG_FS
188 void (*debugfs_init)(struct regmap *map);
190 int (*read)(struct regmap *map, unsigned int reg, unsigned int *value);
191 int (*write)(struct regmap *map, unsigned int reg, unsigned int value);
192 int (*sync)(struct regmap *map, unsigned int min, unsigned int max);
193 int (*drop)(struct regmap *map, unsigned int min, unsigned int max);
196 bool regmap_cached(struct regmap *map, unsigned int reg);
197 bool regmap_writeable(struct regmap *map, unsigned int reg);
198 bool regmap_readable(struct regmap *map, unsigned int reg);
199 bool regmap_volatile(struct regmap *map, unsigned int reg);
200 bool regmap_precious(struct regmap *map, unsigned int reg);
201 bool regmap_writeable_noinc(struct regmap *map, unsigned int reg);
202 bool regmap_readable_noinc(struct regmap *map, unsigned int reg);
204 int _regmap_write(struct regmap *map, unsigned int reg,
207 struct regmap_range_node {
212 unsigned int range_min;
213 unsigned int range_max;
215 unsigned int selector_reg;
216 unsigned int selector_mask;
219 unsigned int window_start;
220 unsigned int window_len;
223 struct regmap_field {
224 struct regmap *regmap;
230 unsigned int id_size;
231 unsigned int id_offset;
234 #ifdef CONFIG_DEBUG_FS
235 extern void regmap_debugfs_initcall(void);
236 extern void regmap_debugfs_init(struct regmap *map);
237 extern void regmap_debugfs_exit(struct regmap *map);
239 static inline void regmap_debugfs_disable(struct regmap *map)
241 map->debugfs_disable = true;
245 static inline void regmap_debugfs_initcall(void) { }
246 static inline void regmap_debugfs_init(struct regmap *map) { }
247 static inline void regmap_debugfs_exit(struct regmap *map) { }
248 static inline void regmap_debugfs_disable(struct regmap *map) { }
251 /* regcache core declarations */
252 int regcache_init(struct regmap *map, const struct regmap_config *config);
253 void regcache_exit(struct regmap *map);
254 int regcache_read(struct regmap *map,
255 unsigned int reg, unsigned int *value);
256 int regcache_write(struct regmap *map,
257 unsigned int reg, unsigned int value);
258 int regcache_sync(struct regmap *map);
259 int regcache_sync_block(struct regmap *map, void *block,
260 unsigned long *cache_present,
261 unsigned int block_base, unsigned int start,
263 bool regcache_reg_needs_sync(struct regmap *map, unsigned int reg,
266 static inline const void *regcache_get_val_addr(struct regmap *map,
270 return base + (map->cache_word_size * idx);
273 unsigned int regcache_get_val(struct regmap *map, const void *base,
275 void regcache_set_val(struct regmap *map, void *base, unsigned int idx,
277 int regcache_lookup_reg(struct regmap *map, unsigned int reg);
278 int regcache_sync_val(struct regmap *map, unsigned int reg, unsigned int val);
280 int _regmap_raw_write(struct regmap *map, unsigned int reg,
281 const void *val, size_t val_len, bool noinc);
283 void regmap_async_complete_cb(struct regmap_async *async, int ret);
285 enum regmap_endian regmap_get_val_endian(struct device *dev,
286 const struct regmap_bus *bus,
287 const struct regmap_config *config);
289 extern struct regcache_ops regcache_rbtree_ops;
290 extern struct regcache_ops regcache_maple_ops;
291 extern struct regcache_ops regcache_flat_ops;
293 static inline const char *regmap_name(const struct regmap *map)
296 return dev_name(map->dev);
301 static inline unsigned int regmap_get_offset(const struct regmap *map,
304 if (map->reg_stride_order >= 0)
305 return index << map->reg_stride_order;
307 return index * map->reg_stride;
310 static inline unsigned int regcache_get_index_by_order(const struct regmap *map,
313 return reg >> map->reg_stride_order;
316 struct regmap_ram_data {
317 unsigned int *vals; /* Allocatd by caller */
320 enum regmap_endian reg_endian;
324 * Create a test register map with data stored in RAM, not intended
327 struct regmap *__regmap_init_ram(const struct regmap_config *config,
328 struct regmap_ram_data *data,
329 struct lock_class_key *lock_key,
330 const char *lock_name);
332 #define regmap_init_ram(config, data) \
333 __regmap_lockdep_wrapper(__regmap_init_ram, #config, config, data)
335 struct regmap *__regmap_init_raw_ram(const struct regmap_config *config,
336 struct regmap_ram_data *data,
337 struct lock_class_key *lock_key,
338 const char *lock_name);
340 #define regmap_init_raw_ram(config, data) \
341 __regmap_lockdep_wrapper(__regmap_init_raw_ram, #config, config, data)