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 max_register_is_set;
97 bool (*writeable_reg)(struct device *dev, unsigned int reg);
98 bool (*readable_reg)(struct device *dev, unsigned int reg);
99 bool (*volatile_reg)(struct device *dev, unsigned int reg);
100 bool (*precious_reg)(struct device *dev, unsigned int reg);
101 bool (*writeable_noinc_reg)(struct device *dev, unsigned int reg);
102 bool (*readable_noinc_reg)(struct device *dev, unsigned int reg);
103 const struct regmap_access_table *wr_table;
104 const struct regmap_access_table *rd_table;
105 const struct regmap_access_table *volatile_table;
106 const struct regmap_access_table *precious_table;
107 const struct regmap_access_table *wr_noinc_table;
108 const struct regmap_access_table *rd_noinc_table;
110 int (*reg_read)(void *context, unsigned int reg, unsigned int *val);
111 int (*reg_write)(void *context, unsigned int reg, unsigned int val);
112 int (*reg_update_bits)(void *context, unsigned int reg,
113 unsigned int mask, unsigned int val);
114 /* Bulk read/write */
115 int (*read)(void *context, const void *reg_buf, size_t reg_size,
116 void *val_buf, size_t val_size);
117 int (*write)(void *context, const void *data, size_t count);
121 unsigned long read_flag_mask;
122 unsigned long write_flag_mask;
124 /* number of bits to (left) shift the reg value when formatting*/
127 int reg_stride_order;
129 /* If set, will always write field to HW. */
130 bool force_write_field;
132 /* regcache specific members */
133 const struct regcache_ops *cache_ops;
134 enum regcache_type cache_type;
136 /* number of bytes in reg_defaults_raw */
137 unsigned int cache_size_raw;
138 /* number of bytes per word in reg_defaults_raw */
139 unsigned int cache_word_size;
140 /* number of entries in reg_defaults */
141 unsigned int num_reg_defaults;
142 /* number of entries in reg_defaults_raw */
143 unsigned int num_reg_defaults_raw;
145 /* if set, only the cache is modified not the HW */
147 /* if set, only the HW is modified not the cache */
149 /* if set, remember to free reg_defaults_raw */
152 struct reg_default *reg_defaults;
153 const void *reg_defaults_raw;
155 /* if set, the cache contains newer data than the HW */
157 /* if set, the HW registers are known to match map->reg_defaults */
158 bool no_sync_defaults;
160 struct reg_sequence *patch;
163 /* if set, converts bulk read to single read */
164 bool use_single_read;
165 /* if set, converts bulk write to single write */
166 bool use_single_write;
167 /* if set, the device supports multi write mode */
168 bool can_multi_write;
170 /* if set, raw reads/writes are limited to this size */
172 size_t max_raw_write;
174 struct rb_root range_tree;
175 void *selector_work_buf; /* Scratch buffer used for selector */
177 struct hwspinlock *hwlock;
179 /* if set, the regmap core can sleep */
183 struct regcache_ops {
185 enum regcache_type type;
186 int (*init)(struct regmap *map);
187 int (*exit)(struct regmap *map);
188 #ifdef CONFIG_DEBUG_FS
189 void (*debugfs_init)(struct regmap *map);
191 int (*read)(struct regmap *map, unsigned int reg, unsigned int *value);
192 int (*write)(struct regmap *map, unsigned int reg, unsigned int value);
193 int (*sync)(struct regmap *map, unsigned int min, unsigned int max);
194 int (*drop)(struct regmap *map, unsigned int min, unsigned int max);
197 bool regmap_cached(struct regmap *map, unsigned int reg);
198 bool regmap_writeable(struct regmap *map, unsigned int reg);
199 bool regmap_readable(struct regmap *map, unsigned int reg);
200 bool regmap_volatile(struct regmap *map, unsigned int reg);
201 bool regmap_precious(struct regmap *map, unsigned int reg);
202 bool regmap_writeable_noinc(struct regmap *map, unsigned int reg);
203 bool regmap_readable_noinc(struct regmap *map, unsigned int reg);
205 int _regmap_write(struct regmap *map, unsigned int reg,
208 struct regmap_range_node {
213 unsigned int range_min;
214 unsigned int range_max;
216 unsigned int selector_reg;
217 unsigned int selector_mask;
220 unsigned int window_start;
221 unsigned int window_len;
224 struct regmap_field {
225 struct regmap *regmap;
231 unsigned int id_size;
232 unsigned int id_offset;
235 #ifdef CONFIG_DEBUG_FS
236 extern void regmap_debugfs_initcall(void);
237 extern void regmap_debugfs_init(struct regmap *map);
238 extern void regmap_debugfs_exit(struct regmap *map);
240 static inline void regmap_debugfs_disable(struct regmap *map)
242 map->debugfs_disable = true;
246 static inline void regmap_debugfs_initcall(void) { }
247 static inline void regmap_debugfs_init(struct regmap *map) { }
248 static inline void regmap_debugfs_exit(struct regmap *map) { }
249 static inline void regmap_debugfs_disable(struct regmap *map) { }
252 /* regcache core declarations */
253 int regcache_init(struct regmap *map, const struct regmap_config *config);
254 void regcache_exit(struct regmap *map);
255 int regcache_read(struct regmap *map,
256 unsigned int reg, unsigned int *value);
257 int regcache_write(struct regmap *map,
258 unsigned int reg, unsigned int value);
259 int regcache_sync(struct regmap *map);
260 int regcache_sync_block(struct regmap *map, void *block,
261 unsigned long *cache_present,
262 unsigned int block_base, unsigned int start,
264 bool regcache_reg_needs_sync(struct regmap *map, unsigned int reg,
267 static inline const void *regcache_get_val_addr(struct regmap *map,
271 return base + (map->cache_word_size * idx);
274 unsigned int regcache_get_val(struct regmap *map, const void *base,
276 void regcache_set_val(struct regmap *map, void *base, unsigned int idx,
278 int regcache_lookup_reg(struct regmap *map, unsigned int reg);
279 int regcache_sync_val(struct regmap *map, unsigned int reg, unsigned int val);
281 int _regmap_raw_write(struct regmap *map, unsigned int reg,
282 const void *val, size_t val_len, bool noinc);
284 void regmap_async_complete_cb(struct regmap_async *async, int ret);
286 enum regmap_endian regmap_get_val_endian(struct device *dev,
287 const struct regmap_bus *bus,
288 const struct regmap_config *config);
290 extern struct regcache_ops regcache_rbtree_ops;
291 extern struct regcache_ops regcache_maple_ops;
292 extern struct regcache_ops regcache_flat_ops;
294 static inline const char *regmap_name(const struct regmap *map)
297 return dev_name(map->dev);
302 static inline unsigned int regmap_get_offset(const struct regmap *map,
305 if (map->reg_stride_order >= 0)
306 return index << map->reg_stride_order;
308 return index * map->reg_stride;
311 static inline unsigned int regcache_get_index_by_order(const struct regmap *map,
314 return reg >> map->reg_stride_order;
317 struct regmap_ram_data {
318 unsigned int *vals; /* Allocatd by caller */
321 enum regmap_endian reg_endian;
322 bool (*noinc_reg)(struct regmap_ram_data *data, unsigned int reg);
326 * Create a test register map with data stored in RAM, not intended
329 struct regmap *__regmap_init_ram(struct device *dev,
330 const struct regmap_config *config,
331 struct regmap_ram_data *data,
332 struct lock_class_key *lock_key,
333 const char *lock_name);
335 #define regmap_init_ram(dev, config, data) \
336 __regmap_lockdep_wrapper(__regmap_init_ram, #dev, dev, config, data)
338 struct regmap *__regmap_init_raw_ram(struct device *dev,
339 const struct regmap_config *config,
340 struct regmap_ram_data *data,
341 struct lock_class_key *lock_key,
342 const char *lock_name);
344 #define regmap_init_raw_ram(dev, config, data) \
345 __regmap_lockdep_wrapper(__regmap_init_raw_ram, #dev, dev, config, data)