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300 lines
8.2 KiB
300 lines
8.2 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Register map access API internal header |
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* |
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* Copyright 2011 Wolfson Microelectronics plc |
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* |
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* Author: Mark Brown <[email protected]> |
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*/ |
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#ifndef _REGMAP_INTERNAL_H |
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#define _REGMAP_INTERNAL_H |
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#include <linux/device.h> |
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#include <linux/regmap.h> |
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#include <linux/fs.h> |
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#include <linux/list.h> |
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#include <linux/wait.h> |
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struct regmap; |
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struct regcache_ops; |
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struct regmap_debugfs_off_cache { |
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struct list_head list; |
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off_t min; |
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off_t max; |
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unsigned int base_reg; |
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unsigned int max_reg; |
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}; |
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struct regmap_format { |
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size_t buf_size; |
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size_t reg_bytes; |
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size_t pad_bytes; |
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size_t val_bytes; |
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void (*format_write)(struct regmap *map, |
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unsigned int reg, unsigned int val); |
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void (*format_reg)(void *buf, unsigned int reg, unsigned int shift); |
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void (*format_val)(void *buf, unsigned int val, unsigned int shift); |
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unsigned int (*parse_val)(const void *buf); |
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void (*parse_inplace)(void *buf); |
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}; |
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struct regmap_async { |
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struct list_head list; |
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struct regmap *map; |
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void *work_buf; |
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}; |
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struct regmap { |
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union { |
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struct mutex mutex; |
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struct { |
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spinlock_t spinlock; |
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unsigned long spinlock_flags; |
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}; |
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}; |
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regmap_lock lock; |
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regmap_unlock unlock; |
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void *lock_arg; /* This is passed to lock/unlock functions */ |
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gfp_t alloc_flags; |
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struct device *dev; /* Device we do I/O on */ |
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void *work_buf; /* Scratch buffer used to format I/O */ |
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struct regmap_format format; /* Buffer format */ |
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const struct regmap_bus *bus; |
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void *bus_context; |
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const char *name; |
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bool async; |
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spinlock_t async_lock; |
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wait_queue_head_t async_waitq; |
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struct list_head async_list; |
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struct list_head async_free; |
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int async_ret; |
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#ifdef CONFIG_DEBUG_FS |
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bool debugfs_disable; |
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struct dentry *debugfs; |
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const char *debugfs_name; |
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unsigned int debugfs_reg_len; |
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unsigned int debugfs_val_len; |
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unsigned int debugfs_tot_len; |
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struct list_head debugfs_off_cache; |
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struct mutex cache_lock; |
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#endif |
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unsigned int max_register; |
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bool (*writeable_reg)(struct device *dev, unsigned int reg); |
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bool (*readable_reg)(struct device *dev, unsigned int reg); |
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bool (*volatile_reg)(struct device *dev, unsigned int reg); |
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bool (*precious_reg)(struct device *dev, unsigned int reg); |
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bool (*writeable_noinc_reg)(struct device *dev, unsigned int reg); |
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bool (*readable_noinc_reg)(struct device *dev, unsigned int reg); |
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const struct regmap_access_table *wr_table; |
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const struct regmap_access_table *rd_table; |
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const struct regmap_access_table *volatile_table; |
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const struct regmap_access_table *precious_table; |
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const struct regmap_access_table *wr_noinc_table; |
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const struct regmap_access_table *rd_noinc_table; |
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int (*reg_read)(void *context, unsigned int reg, unsigned int *val); |
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int (*reg_write)(void *context, unsigned int reg, unsigned int val); |
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int (*reg_update_bits)(void *context, unsigned int reg, |
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unsigned int mask, unsigned int val); |
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bool defer_caching; |
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unsigned long read_flag_mask; |
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unsigned long write_flag_mask; |
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/* number of bits to (left) shift the reg value when formatting*/ |
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int reg_shift; |
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int reg_stride; |
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int reg_stride_order; |
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/* regcache specific members */ |
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const struct regcache_ops *cache_ops; |
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enum regcache_type cache_type; |
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/* number of bytes in reg_defaults_raw */ |
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unsigned int cache_size_raw; |
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/* number of bytes per word in reg_defaults_raw */ |
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unsigned int cache_word_size; |
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/* number of entries in reg_defaults */ |
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unsigned int num_reg_defaults; |
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/* number of entries in reg_defaults_raw */ |
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unsigned int num_reg_defaults_raw; |
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/* if set, only the cache is modified not the HW */ |
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bool cache_only; |
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/* if set, only the HW is modified not the cache */ |
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bool cache_bypass; |
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/* if set, remember to free reg_defaults_raw */ |
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bool cache_free; |
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struct reg_default *reg_defaults; |
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const void *reg_defaults_raw; |
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void *cache; |
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/* if set, the cache contains newer data than the HW */ |
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bool cache_dirty; |
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/* if set, the HW registers are known to match map->reg_defaults */ |
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bool no_sync_defaults; |
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struct reg_sequence *patch; |
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int patch_regs; |
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/* if set, converts bulk read to single read */ |
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bool use_single_read; |
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/* if set, converts bulk write to single write */ |
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bool use_single_write; |
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/* if set, the device supports multi write mode */ |
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bool can_multi_write; |
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/* if set, raw reads/writes are limited to this size */ |
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size_t max_raw_read; |
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size_t max_raw_write; |
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struct rb_root range_tree; |
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void *selector_work_buf; /* Scratch buffer used for selector */ |
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struct hwspinlock *hwlock; |
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/* if set, the regmap core can sleep */ |
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bool can_sleep; |
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}; |
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struct regcache_ops { |
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const char *name; |
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enum regcache_type type; |
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int (*init)(struct regmap *map); |
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int (*exit)(struct regmap *map); |
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#ifdef CONFIG_DEBUG_FS |
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void (*debugfs_init)(struct regmap *map); |
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#endif |
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int (*read)(struct regmap *map, unsigned int reg, unsigned int *value); |
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int (*write)(struct regmap *map, unsigned int reg, unsigned int value); |
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int (*sync)(struct regmap *map, unsigned int min, unsigned int max); |
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int (*drop)(struct regmap *map, unsigned int min, unsigned int max); |
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}; |
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bool regmap_cached(struct regmap *map, unsigned int reg); |
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bool regmap_writeable(struct regmap *map, unsigned int reg); |
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bool regmap_readable(struct regmap *map, unsigned int reg); |
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bool regmap_volatile(struct regmap *map, unsigned int reg); |
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bool regmap_precious(struct regmap *map, unsigned int reg); |
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bool regmap_writeable_noinc(struct regmap *map, unsigned int reg); |
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bool regmap_readable_noinc(struct regmap *map, unsigned int reg); |
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int _regmap_write(struct regmap *map, unsigned int reg, |
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unsigned int val); |
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struct regmap_range_node { |
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struct rb_node node; |
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const char *name; |
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struct regmap *map; |
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unsigned int range_min; |
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unsigned int range_max; |
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unsigned int selector_reg; |
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unsigned int selector_mask; |
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int selector_shift; |
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unsigned int window_start; |
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unsigned int window_len; |
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}; |
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struct regmap_field { |
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struct regmap *regmap; |
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unsigned int mask; |
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/* lsb */ |
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unsigned int shift; |
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unsigned int reg; |
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unsigned int id_size; |
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unsigned int id_offset; |
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}; |
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#ifdef CONFIG_DEBUG_FS |
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extern void regmap_debugfs_initcall(void); |
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extern void regmap_debugfs_init(struct regmap *map); |
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extern void regmap_debugfs_exit(struct regmap *map); |
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static inline void regmap_debugfs_disable(struct regmap *map) |
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{ |
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map->debugfs_disable = true; |
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} |
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#else |
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static inline void regmap_debugfs_initcall(void) { } |
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static inline void regmap_debugfs_init(struct regmap *map) { } |
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static inline void regmap_debugfs_exit(struct regmap *map) { } |
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static inline void regmap_debugfs_disable(struct regmap *map) { } |
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#endif |
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/* regcache core declarations */ |
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int regcache_init(struct regmap *map, const struct regmap_config *config); |
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void regcache_exit(struct regmap *map); |
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int regcache_read(struct regmap *map, |
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unsigned int reg, unsigned int *value); |
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int regcache_write(struct regmap *map, |
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unsigned int reg, unsigned int value); |
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int regcache_sync(struct regmap *map); |
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int regcache_sync_block(struct regmap *map, void *block, |
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unsigned long *cache_present, |
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unsigned int block_base, unsigned int start, |
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unsigned int end); |
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static inline const void *regcache_get_val_addr(struct regmap *map, |
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const void *base, |
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unsigned int idx) |
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{ |
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return base + (map->cache_word_size * idx); |
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} |
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unsigned int regcache_get_val(struct regmap *map, const void *base, |
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unsigned int idx); |
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bool regcache_set_val(struct regmap *map, void *base, unsigned int idx, |
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unsigned int val); |
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int regcache_lookup_reg(struct regmap *map, unsigned int reg); |
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int _regmap_raw_write(struct regmap *map, unsigned int reg, |
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const void *val, size_t val_len, bool noinc); |
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void regmap_async_complete_cb(struct regmap_async *async, int ret); |
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enum regmap_endian regmap_get_val_endian(struct device *dev, |
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const struct regmap_bus *bus, |
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const struct regmap_config *config); |
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extern struct regcache_ops regcache_rbtree_ops; |
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extern struct regcache_ops regcache_lzo_ops; |
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extern struct regcache_ops regcache_flat_ops; |
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static inline const char *regmap_name(const struct regmap *map) |
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{ |
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if (map->dev) |
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return dev_name(map->dev); |
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return map->name; |
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} |
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static inline unsigned int regmap_get_offset(const struct regmap *map, |
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unsigned int index) |
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{ |
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if (map->reg_stride_order >= 0) |
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return index << map->reg_stride_order; |
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else |
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return index * map->reg_stride; |
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} |
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static inline unsigned int regcache_get_index_by_order(const struct regmap *map, |
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unsigned int reg) |
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{ |
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return reg >> map->reg_stride_order; |
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} |
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#endif
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