371 lines
11 KiB
C
371 lines
11 KiB
C
#ifndef __LINUX_REGMAP_H
|
|
#define __LINUX_REGMAP_H
|
|
|
|
/*
|
|
* Register map access API
|
|
*
|
|
* Copyright 2011 Wolfson Microelectronics plc
|
|
*
|
|
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/list.h>
|
|
|
|
struct module;
|
|
struct device;
|
|
struct i2c_client;
|
|
struct spi_device;
|
|
struct regmap;
|
|
|
|
/* An enum of all the supported cache types */
|
|
enum regcache_type {
|
|
REGCACHE_NONE,
|
|
REGCACHE_RBTREE,
|
|
REGCACHE_COMPRESSED
|
|
};
|
|
|
|
/**
|
|
* Default value for a register. We use an array of structs rather
|
|
* than a simple array as many modern devices have very sparse
|
|
* register maps.
|
|
*
|
|
* @reg: Register address.
|
|
* @def: Register default value.
|
|
*/
|
|
struct reg_default {
|
|
unsigned int reg;
|
|
unsigned int def;
|
|
};
|
|
|
|
#ifdef CONFIG_REGMAP
|
|
|
|
/**
|
|
* Configuration for the register map of a device.
|
|
*
|
|
* @name: Optional name of the regmap. Useful when a device has multiple
|
|
* register regions.
|
|
*
|
|
* @reg_bits: Number of bits in a register address, mandatory.
|
|
* @reg_stride: The register address stride. Valid register addresses are a
|
|
* multiple of this value. If set to 0, a value of 1 will be
|
|
* used.
|
|
* @pad_bits: Number of bits of padding between register and value.
|
|
* @val_bits: Number of bits in a register value, mandatory.
|
|
*
|
|
* @writeable_reg: Optional callback returning true if the register
|
|
* can be written to.
|
|
* @readable_reg: Optional callback returning true if the register
|
|
* can be read from.
|
|
* @volatile_reg: Optional callback returning true if the register
|
|
* value can't be cached.
|
|
* @precious_reg: Optional callback returning true if the rgister
|
|
* should not be read outside of a call from the driver
|
|
* (eg, a clear on read interrupt status register).
|
|
*
|
|
* @max_register: Optional, specifies the maximum valid register index.
|
|
* @reg_defaults: Power on reset values for registers (for use with
|
|
* register cache support).
|
|
* @num_reg_defaults: Number of elements in reg_defaults.
|
|
*
|
|
* @read_flag_mask: Mask to be set in the top byte of the register when doing
|
|
* a read.
|
|
* @write_flag_mask: Mask to be set in the top byte of the register when doing
|
|
* a write. If both read_flag_mask and write_flag_mask are
|
|
* empty the regmap_bus default masks are used.
|
|
* @use_single_rw: If set, converts the bulk read and write operations into
|
|
* a series of single read and write operations. This is useful
|
|
* for device that does not support bulk read and write.
|
|
*
|
|
* @cache_type: The actual cache type.
|
|
* @reg_defaults_raw: Power on reset values for registers (for use with
|
|
* register cache support).
|
|
* @num_reg_defaults_raw: Number of elements in reg_defaults_raw.
|
|
*/
|
|
struct regmap_config {
|
|
const char *name;
|
|
|
|
int reg_bits;
|
|
int reg_stride;
|
|
int pad_bits;
|
|
int val_bits;
|
|
|
|
bool (*writeable_reg)(struct device *dev, unsigned int reg);
|
|
bool (*readable_reg)(struct device *dev, unsigned int reg);
|
|
bool (*volatile_reg)(struct device *dev, unsigned int reg);
|
|
bool (*precious_reg)(struct device *dev, unsigned int reg);
|
|
|
|
unsigned int max_register;
|
|
const struct reg_default *reg_defaults;
|
|
unsigned int num_reg_defaults;
|
|
enum regcache_type cache_type;
|
|
const void *reg_defaults_raw;
|
|
unsigned int num_reg_defaults_raw;
|
|
|
|
u8 read_flag_mask;
|
|
u8 write_flag_mask;
|
|
|
|
bool use_single_rw;
|
|
};
|
|
|
|
typedef int (*regmap_hw_write)(void *context, const void *data,
|
|
size_t count);
|
|
typedef int (*regmap_hw_gather_write)(void *context,
|
|
const void *reg, size_t reg_len,
|
|
const void *val, size_t val_len);
|
|
typedef int (*regmap_hw_read)(void *context,
|
|
const void *reg_buf, size_t reg_size,
|
|
void *val_buf, size_t val_size);
|
|
typedef void (*regmap_hw_free_context)(void *context);
|
|
|
|
/**
|
|
* Description of a hardware bus for the register map infrastructure.
|
|
*
|
|
* @fast_io: Register IO is fast. Use a spinlock instead of a mutex
|
|
* to perform locking.
|
|
* @write: Write operation.
|
|
* @gather_write: Write operation with split register/value, return -ENOTSUPP
|
|
* if not implemented on a given device.
|
|
* @read: Read operation. Data is returned in the buffer used to transmit
|
|
* data.
|
|
* @read_flag_mask: Mask to be set in the top byte of the register when doing
|
|
* a read.
|
|
*/
|
|
struct regmap_bus {
|
|
bool fast_io;
|
|
regmap_hw_write write;
|
|
regmap_hw_gather_write gather_write;
|
|
regmap_hw_read read;
|
|
regmap_hw_free_context free_context;
|
|
u8 read_flag_mask;
|
|
};
|
|
|
|
struct regmap *regmap_init(struct device *dev,
|
|
const struct regmap_bus *bus,
|
|
void *bus_context,
|
|
const struct regmap_config *config);
|
|
struct regmap *regmap_init_i2c(struct i2c_client *i2c,
|
|
const struct regmap_config *config);
|
|
struct regmap *regmap_init_spi(struct spi_device *dev,
|
|
const struct regmap_config *config);
|
|
struct regmap *regmap_init_mmio(struct device *dev,
|
|
void __iomem *regs,
|
|
const struct regmap_config *config);
|
|
|
|
struct regmap *devm_regmap_init(struct device *dev,
|
|
const struct regmap_bus *bus,
|
|
void *bus_context,
|
|
const struct regmap_config *config);
|
|
struct regmap *devm_regmap_init_i2c(struct i2c_client *i2c,
|
|
const struct regmap_config *config);
|
|
struct regmap *devm_regmap_init_spi(struct spi_device *dev,
|
|
const struct regmap_config *config);
|
|
struct regmap *devm_regmap_init_mmio(struct device *dev,
|
|
void __iomem *regs,
|
|
const struct regmap_config *config);
|
|
|
|
void regmap_exit(struct regmap *map);
|
|
int regmap_reinit_cache(struct regmap *map,
|
|
const struct regmap_config *config);
|
|
struct regmap *dev_get_regmap(struct device *dev, const char *name);
|
|
int regmap_write(struct regmap *map, unsigned int reg, unsigned int val);
|
|
int regmap_raw_write(struct regmap *map, unsigned int reg,
|
|
const void *val, size_t val_len);
|
|
int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
|
|
size_t val_count);
|
|
int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val);
|
|
int regmap_raw_read(struct regmap *map, unsigned int reg,
|
|
void *val, size_t val_len);
|
|
int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
|
|
size_t val_count);
|
|
int regmap_update_bits(struct regmap *map, unsigned int reg,
|
|
unsigned int mask, unsigned int val);
|
|
int regmap_update_bits_check(struct regmap *map, unsigned int reg,
|
|
unsigned int mask, unsigned int val,
|
|
bool *change);
|
|
int regmap_get_val_bytes(struct regmap *map);
|
|
|
|
int regcache_sync(struct regmap *map);
|
|
int regcache_sync_region(struct regmap *map, unsigned int min,
|
|
unsigned int max);
|
|
void regcache_cache_only(struct regmap *map, bool enable);
|
|
void regcache_cache_bypass(struct regmap *map, bool enable);
|
|
void regcache_mark_dirty(struct regmap *map);
|
|
|
|
int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
|
|
int num_regs);
|
|
|
|
/**
|
|
* Description of an IRQ for the generic regmap irq_chip.
|
|
*
|
|
* @reg_offset: Offset of the status/mask register within the bank
|
|
* @mask: Mask used to flag/control the register.
|
|
*/
|
|
struct regmap_irq {
|
|
unsigned int reg_offset;
|
|
unsigned int mask;
|
|
};
|
|
|
|
/**
|
|
* Description of a generic regmap irq_chip. This is not intended to
|
|
* handle every possible interrupt controller, but it should handle a
|
|
* substantial proportion of those that are found in the wild.
|
|
*
|
|
* @name: Descriptive name for IRQ controller.
|
|
*
|
|
* @status_base: Base status register address.
|
|
* @mask_base: Base mask register address.
|
|
* @ack_base: Base ack address. If zero then the chip is clear on read.
|
|
* @irq_reg_stride: Stride to use for chips where registers are not contiguous.
|
|
*
|
|
* @num_regs: Number of registers in each control bank.
|
|
* @irqs: Descriptors for individual IRQs. Interrupt numbers are
|
|
* assigned based on the index in the array of the interrupt.
|
|
* @num_irqs: Number of descriptors.
|
|
*/
|
|
struct regmap_irq_chip {
|
|
const char *name;
|
|
|
|
unsigned int status_base;
|
|
unsigned int mask_base;
|
|
unsigned int ack_base;
|
|
unsigned int irq_reg_stride;
|
|
|
|
int num_regs;
|
|
|
|
const struct regmap_irq *irqs;
|
|
int num_irqs;
|
|
};
|
|
|
|
struct regmap_irq_chip_data;
|
|
|
|
int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
|
|
int irq_base, struct regmap_irq_chip *chip,
|
|
struct regmap_irq_chip_data **data);
|
|
void regmap_del_irq_chip(int irq, struct regmap_irq_chip_data *data);
|
|
int regmap_irq_chip_get_base(struct regmap_irq_chip_data *data);
|
|
int regmap_irq_get_virq(struct regmap_irq_chip_data *data, int irq);
|
|
|
|
#else
|
|
|
|
/*
|
|
* These stubs should only ever be called by generic code which has
|
|
* regmap based facilities, if they ever get called at runtime
|
|
* something is going wrong and something probably needs to select
|
|
* REGMAP.
|
|
*/
|
|
|
|
static inline int regmap_write(struct regmap *map, unsigned int reg,
|
|
unsigned int val)
|
|
{
|
|
WARN_ONCE(1, "regmap API is disabled");
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int regmap_raw_write(struct regmap *map, unsigned int reg,
|
|
const void *val, size_t val_len)
|
|
{
|
|
WARN_ONCE(1, "regmap API is disabled");
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int regmap_bulk_write(struct regmap *map, unsigned int reg,
|
|
const void *val, size_t val_count)
|
|
{
|
|
WARN_ONCE(1, "regmap API is disabled");
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int regmap_read(struct regmap *map, unsigned int reg,
|
|
unsigned int *val)
|
|
{
|
|
WARN_ONCE(1, "regmap API is disabled");
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int regmap_raw_read(struct regmap *map, unsigned int reg,
|
|
void *val, size_t val_len)
|
|
{
|
|
WARN_ONCE(1, "regmap API is disabled");
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int regmap_bulk_read(struct regmap *map, unsigned int reg,
|
|
void *val, size_t val_count)
|
|
{
|
|
WARN_ONCE(1, "regmap API is disabled");
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int regmap_update_bits(struct regmap *map, unsigned int reg,
|
|
unsigned int mask, unsigned int val)
|
|
{
|
|
WARN_ONCE(1, "regmap API is disabled");
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int regmap_update_bits_check(struct regmap *map,
|
|
unsigned int reg,
|
|
unsigned int mask, unsigned int val,
|
|
bool *change)
|
|
{
|
|
WARN_ONCE(1, "regmap API is disabled");
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int regmap_get_val_bytes(struct regmap *map)
|
|
{
|
|
WARN_ONCE(1, "regmap API is disabled");
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int regcache_sync(struct regmap *map)
|
|
{
|
|
WARN_ONCE(1, "regmap API is disabled");
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int regcache_sync_region(struct regmap *map, unsigned int min,
|
|
unsigned int max)
|
|
{
|
|
WARN_ONCE(1, "regmap API is disabled");
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline void regcache_cache_only(struct regmap *map, bool enable)
|
|
{
|
|
WARN_ONCE(1, "regmap API is disabled");
|
|
}
|
|
|
|
static inline void regcache_cache_bypass(struct regmap *map, bool enable)
|
|
{
|
|
WARN_ONCE(1, "regmap API is disabled");
|
|
}
|
|
|
|
static inline void regcache_mark_dirty(struct regmap *map)
|
|
{
|
|
WARN_ONCE(1, "regmap API is disabled");
|
|
}
|
|
|
|
static inline int regmap_register_patch(struct regmap *map,
|
|
const struct reg_default *regs,
|
|
int num_regs)
|
|
{
|
|
WARN_ONCE(1, "regmap API is disabled");
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline struct regmap *dev_get_regmap(struct device *dev,
|
|
const char *name)
|
|
{
|
|
WARN_ONCE(1, "regmap API is disabled");
|
|
return NULL;
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif
|