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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>
17#include <linux/fs.h>
18#include <linux/list.h>
19#include <linux/wait.h>
20
21struct regmap;
22struct regcache_ops;
23
24struct regmap_debugfs_off_cache {
25 struct list_head list;
26 off_t min;
27 off_t max;
28 unsigned int base_reg;
29 unsigned int max_reg;
30};
31
32struct regmap_format {
33 size_t buf_size;
34 size_t reg_bytes;
35 size_t pad_bytes;
36 size_t val_bytes;
37 void (*format_write)(struct regmap *map,
38 unsigned int reg, unsigned int val);
39 void (*format_reg)(void *buf, unsigned int reg, unsigned int shift);
40 void (*format_val)(void *buf, unsigned int val, unsigned int shift);
41 unsigned int (*parse_val)(const void *buf);
42 void (*parse_inplace)(void *buf);
43};
44
45struct regmap_async {
46 struct list_head list;
47 struct regmap *map;
48 void *work_buf;
49};
50
51struct regmap {
52 struct mutex mutex;
53 spinlock_t spinlock;
54 unsigned long spinlock_flags;
55 regmap_lock lock;
56 regmap_unlock unlock;
57 void *lock_arg; /* This is passed to lock/unlock functions */
58
59 struct device *dev; /* Device we do I/O on */
60 void *work_buf; /* Scratch buffer used to format I/O */
61 struct regmap_format format; /* Buffer format */
62 const struct regmap_bus *bus;
63 void *bus_context;
64 const char *name;
65
66 bool async;
67 spinlock_t async_lock;
68 wait_queue_head_t async_waitq;
69 struct list_head async_list;
70 struct list_head async_free;
71 int async_ret;
72
73#ifdef CONFIG_DEBUG_FS
74 struct dentry *debugfs;
75 const char *debugfs_name;
76
77 unsigned int debugfs_reg_len;
78 unsigned int debugfs_val_len;
79 unsigned int debugfs_tot_len;
80
81 struct list_head debugfs_off_cache;
82 struct mutex cache_lock;
83#endif
84
85 unsigned int max_register;
86 bool (*writeable_reg)(struct device *dev, unsigned int reg);
87 bool (*readable_reg)(struct device *dev, unsigned int reg);
88 bool (*volatile_reg)(struct device *dev, unsigned int reg);
89 bool (*precious_reg)(struct device *dev, unsigned int reg);
90 const struct regmap_access_table *wr_table;
91 const struct regmap_access_table *rd_table;
92 const struct regmap_access_table *volatile_table;
93 const struct regmap_access_table *precious_table;
94
95 int (*reg_read)(void *context, unsigned int reg, unsigned int *val);
96 int (*reg_write)(void *context, unsigned int reg, unsigned int val);
97
98 bool defer_caching;
99
100 u8 read_flag_mask;
101 u8 write_flag_mask;
102
103 /* number of bits to (left) shift the reg value when formatting*/
104 int reg_shift;
105 int reg_stride;
106
107 /* regcache specific members */
108 const struct regcache_ops *cache_ops;
109 enum regcache_type cache_type;
110
111 /* number of bytes in reg_defaults_raw */
112 unsigned int cache_size_raw;
113 /* number of bytes per word in reg_defaults_raw */
114 unsigned int cache_word_size;
115 /* number of entries in reg_defaults */
116 unsigned int num_reg_defaults;
117 /* number of entries in reg_defaults_raw */
118 unsigned int num_reg_defaults_raw;
119
120 /* if set, only the cache is modified not the HW */
121 u32 cache_only;
122 /* if set, only the HW is modified not the cache */
123 u32 cache_bypass;
124 /* if set, remember to free reg_defaults_raw */
125 bool cache_free;
126
127 struct reg_default *reg_defaults;
128 const void *reg_defaults_raw;
129 void *cache;
130 u32 cache_dirty;
131
132 struct reg_default *patch;
133 int patch_regs;
134
135 /* if set, converts bulk rw to single rw */
136 bool use_single_rw;
137 /* if set, the device supports multi write mode */
138 bool can_multi_write;
139
140 struct rb_root range_tree;
141 void *selector_work_buf; /* Scratch buffer used for selector */
142};
143
144struct regcache_ops {
145 const char *name;
146 enum regcache_type type;
147 int (*init)(struct regmap *map);
148 int (*exit)(struct regmap *map);
149 int (*read)(struct regmap *map, unsigned int reg, unsigned int *value);
150 int (*write)(struct regmap *map, unsigned int reg, unsigned int value);
151 int (*sync)(struct regmap *map, unsigned int min, unsigned int max);
152 int (*drop)(struct regmap *map, unsigned int min, unsigned int max);
153};
154
155bool regmap_writeable(struct regmap *map, unsigned int reg);
156bool regmap_readable(struct regmap *map, unsigned int reg);
157bool regmap_volatile(struct regmap *map, unsigned int reg);
158bool regmap_precious(struct regmap *map, unsigned int reg);
159
160int _regmap_write(struct regmap *map, unsigned int reg,
161 unsigned int val);
162
163struct regmap_range_node {
164 struct rb_node node;
165 const char *name;
166 struct regmap *map;
167
168 unsigned int range_min;
169 unsigned int range_max;
170
171 unsigned int selector_reg;
172 unsigned int selector_mask;
173 int selector_shift;
174
175 unsigned int window_start;
176 unsigned int window_len;
177};
178
179struct regmap_field {
180 struct regmap *regmap;
181 unsigned int mask;
182 /* lsb */
183 unsigned int shift;
184 unsigned int reg;
185
186 unsigned int id_size;
187 unsigned int id_offset;
188};
189
190#ifdef CONFIG_DEBUG_FS
191extern void regmap_debugfs_initcall(void);
192extern void regmap_debugfs_init(struct regmap *map, const char *name);
193extern void regmap_debugfs_exit(struct regmap *map);
194#else
195static inline void regmap_debugfs_initcall(void) { }
196static inline void regmap_debugfs_init(struct regmap *map, const char *name) { }
197static inline void regmap_debugfs_exit(struct regmap *map) { }
198#endif
199
200/* regcache core declarations */
201int regcache_init(struct regmap *map, const struct regmap_config *config);
202void regcache_exit(struct regmap *map);
203int regcache_read(struct regmap *map,
204 unsigned int reg, unsigned int *value);
205int regcache_write(struct regmap *map,
206 unsigned int reg, unsigned int value);
207int regcache_sync(struct regmap *map);
208int regcache_sync_block(struct regmap *map, void *block,
209 unsigned long *cache_present,
210 unsigned int block_base, unsigned int start,
211 unsigned int end);
212
213static inline const void *regcache_get_val_addr(struct regmap *map,
214 const void *base,
215 unsigned int idx)
216{
217 return base + (map->cache_word_size * idx);
218}
219
220unsigned int regcache_get_val(struct regmap *map, const void *base,
221 unsigned int idx);
222bool regcache_set_val(struct regmap *map, void *base, unsigned int idx,
223 unsigned int val);
224int regcache_lookup_reg(struct regmap *map, unsigned int reg);
225
226int _regmap_raw_write(struct regmap *map, unsigned int reg,
227 const void *val, size_t val_len);
228
229void regmap_async_complete_cb(struct regmap_async *async, int ret);
230
231extern struct regcache_ops regcache_rbtree_ops;
232extern struct regcache_ops regcache_lzo_ops;
233extern struct regcache_ops regcache_flat_ops;
234
235#endif
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Register map access API internal header
4 *
5 * Copyright 2011 Wolfson Microelectronics plc
6 *
7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
8 */
9
10#ifndef _REGMAP_INTERNAL_H
11#define _REGMAP_INTERNAL_H
12
13#include <linux/device.h>
14#include <linux/regmap.h>
15#include <linux/fs.h>
16#include <linux/list.h>
17#include <linux/wait.h>
18
19struct regmap;
20struct regcache_ops;
21
22struct regmap_debugfs_off_cache {
23 struct list_head list;
24 off_t min;
25 off_t max;
26 unsigned int base_reg;
27 unsigned int max_reg;
28};
29
30struct regmap_format {
31 size_t buf_size;
32 size_t reg_bytes;
33 size_t pad_bytes;
34 size_t reg_downshift;
35 size_t val_bytes;
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);
42};
43
44struct regmap_async {
45 struct list_head list;
46 struct regmap *map;
47 void *work_buf;
48};
49
50struct regmap {
51 union {
52 struct mutex mutex;
53 struct {
54 spinlock_t spinlock;
55 unsigned long spinlock_flags;
56 };
57 struct {
58 raw_spinlock_t raw_spinlock;
59 unsigned long raw_spinlock_flags;
60 };
61 };
62 regmap_lock lock;
63 regmap_unlock unlock;
64 void *lock_arg; /* This is passed to lock/unlock functions */
65 gfp_t alloc_flags;
66 unsigned int reg_base;
67
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;
72 void *bus_context;
73 const char *name;
74
75 bool async;
76 spinlock_t async_lock;
77 wait_queue_head_t async_waitq;
78 struct list_head async_list;
79 struct list_head async_free;
80 int async_ret;
81
82#ifdef CONFIG_DEBUG_FS
83 bool debugfs_disable;
84 struct dentry *debugfs;
85 const char *debugfs_name;
86
87 unsigned int debugfs_reg_len;
88 unsigned int debugfs_val_len;
89 unsigned int debugfs_tot_len;
90
91 struct list_head debugfs_off_cache;
92 struct mutex cache_lock;
93#endif
94
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;
108
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);
117
118 bool defer_caching;
119
120 unsigned long read_flag_mask;
121 unsigned long write_flag_mask;
122
123 /* number of bits to (left) shift the reg value when formatting*/
124 int reg_shift;
125 int reg_stride;
126 int reg_stride_order;
127
128 /* regcache specific members */
129 const struct regcache_ops *cache_ops;
130 enum regcache_type cache_type;
131
132 /* number of bytes in reg_defaults_raw */
133 unsigned int cache_size_raw;
134 /* number of bytes per word in reg_defaults_raw */
135 unsigned int cache_word_size;
136 /* number of entries in reg_defaults */
137 unsigned int num_reg_defaults;
138 /* number of entries in reg_defaults_raw */
139 unsigned int num_reg_defaults_raw;
140
141 /* if set, only the cache is modified not the HW */
142 bool cache_only;
143 /* if set, only the HW is modified not the cache */
144 bool cache_bypass;
145 /* if set, remember to free reg_defaults_raw */
146 bool cache_free;
147
148 struct reg_default *reg_defaults;
149 const void *reg_defaults_raw;
150 void *cache;
151 /* if set, the cache contains newer data than the HW */
152 bool cache_dirty;
153 /* if set, the HW registers are known to match map->reg_defaults */
154 bool no_sync_defaults;
155
156 struct reg_sequence *patch;
157 int patch_regs;
158
159 /* if set, converts bulk read to single read */
160 bool use_single_read;
161 /* if set, converts bulk write to single write */
162 bool use_single_write;
163 /* if set, the device supports multi write mode */
164 bool can_multi_write;
165
166 /* if set, raw reads/writes are limited to this size */
167 size_t max_raw_read;
168 size_t max_raw_write;
169
170 struct rb_root range_tree;
171 void *selector_work_buf; /* Scratch buffer used for selector */
172
173 struct hwspinlock *hwlock;
174
175 /* if set, the regmap core can sleep */
176 bool can_sleep;
177};
178
179struct regcache_ops {
180 const char *name;
181 enum regcache_type type;
182 int (*init)(struct regmap *map);
183 int (*exit)(struct regmap *map);
184#ifdef CONFIG_DEBUG_FS
185 void (*debugfs_init)(struct regmap *map);
186#endif
187 int (*read)(struct regmap *map, unsigned int reg, unsigned int *value);
188 int (*write)(struct regmap *map, unsigned int reg, unsigned int value);
189 int (*sync)(struct regmap *map, unsigned int min, unsigned int max);
190 int (*drop)(struct regmap *map, unsigned int min, unsigned int max);
191};
192
193bool regmap_cached(struct regmap *map, unsigned int reg);
194bool regmap_writeable(struct regmap *map, unsigned int reg);
195bool regmap_readable(struct regmap *map, unsigned int reg);
196bool regmap_volatile(struct regmap *map, unsigned int reg);
197bool regmap_precious(struct regmap *map, unsigned int reg);
198bool regmap_writeable_noinc(struct regmap *map, unsigned int reg);
199bool regmap_readable_noinc(struct regmap *map, unsigned int reg);
200
201int _regmap_write(struct regmap *map, unsigned int reg,
202 unsigned int val);
203
204struct regmap_range_node {
205 struct rb_node node;
206 const char *name;
207 struct regmap *map;
208
209 unsigned int range_min;
210 unsigned int range_max;
211
212 unsigned int selector_reg;
213 unsigned int selector_mask;
214 int selector_shift;
215
216 unsigned int window_start;
217 unsigned int window_len;
218};
219
220struct regmap_field {
221 struct regmap *regmap;
222 unsigned int mask;
223 /* lsb */
224 unsigned int shift;
225 unsigned int reg;
226
227 unsigned int id_size;
228 unsigned int id_offset;
229};
230
231#ifdef CONFIG_DEBUG_FS
232extern void regmap_debugfs_initcall(void);
233extern void regmap_debugfs_init(struct regmap *map);
234extern void regmap_debugfs_exit(struct regmap *map);
235
236static inline void regmap_debugfs_disable(struct regmap *map)
237{
238 map->debugfs_disable = true;
239}
240
241#else
242static inline void regmap_debugfs_initcall(void) { }
243static inline void regmap_debugfs_init(struct regmap *map) { }
244static inline void regmap_debugfs_exit(struct regmap *map) { }
245static inline void regmap_debugfs_disable(struct regmap *map) { }
246#endif
247
248/* regcache core declarations */
249int regcache_init(struct regmap *map, const struct regmap_config *config);
250void regcache_exit(struct regmap *map);
251int regcache_read(struct regmap *map,
252 unsigned int reg, unsigned int *value);
253int regcache_write(struct regmap *map,
254 unsigned int reg, unsigned int value);
255int regcache_sync(struct regmap *map);
256int regcache_sync_block(struct regmap *map, void *block,
257 unsigned long *cache_present,
258 unsigned int block_base, unsigned int start,
259 unsigned int end);
260
261static inline const void *regcache_get_val_addr(struct regmap *map,
262 const void *base,
263 unsigned int idx)
264{
265 return base + (map->cache_word_size * idx);
266}
267
268unsigned int regcache_get_val(struct regmap *map, const void *base,
269 unsigned int idx);
270bool regcache_set_val(struct regmap *map, void *base, unsigned int idx,
271 unsigned int val);
272int regcache_lookup_reg(struct regmap *map, unsigned int reg);
273
274int _regmap_raw_write(struct regmap *map, unsigned int reg,
275 const void *val, size_t val_len, bool noinc);
276
277void regmap_async_complete_cb(struct regmap_async *async, int ret);
278
279enum regmap_endian regmap_get_val_endian(struct device *dev,
280 const struct regmap_bus *bus,
281 const struct regmap_config *config);
282
283extern struct regcache_ops regcache_rbtree_ops;
284extern struct regcache_ops regcache_lzo_ops;
285extern struct regcache_ops regcache_flat_ops;
286
287static inline const char *regmap_name(const struct regmap *map)
288{
289 if (map->dev)
290 return dev_name(map->dev);
291
292 return map->name;
293}
294
295static inline unsigned int regmap_get_offset(const struct regmap *map,
296 unsigned int index)
297{
298 if (map->reg_stride_order >= 0)
299 return index << map->reg_stride_order;
300 else
301 return index * map->reg_stride;
302}
303
304static inline unsigned int regcache_get_index_by_order(const struct regmap *map,
305 unsigned int reg)
306{
307 return reg >> map->reg_stride_order;
308}
309
310#endif