mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-27 07:01:24 +00:00
73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2015 Google, Inc
|
||
|
|
* Written by Simon Glass <sjg@chromium.org>
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: GPL-2.0+
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __REGMAP_H
|
||
|
|
#define __REGMAP_H
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct regmap_range - a register map range
|
||
|
|
*
|
||
|
|
* @start: Start address
|
||
|
|
* @size: Size in bytes
|
||
|
|
*/
|
||
|
|
struct regmap_range {
|
||
|
|
ulong start;
|
||
|
|
ulong size;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct regmap - a way of accessing hardware/bus registers
|
||
|
|
*
|
||
|
|
* @base: Base address of register map
|
||
|
|
* @range_count: Number of ranges available within the map
|
||
|
|
* @range: Pointer to the list of ranges, allocated if @range_count > 1
|
||
|
|
* @base_range: If @range_count is <= 1, @range points here
|
||
|
|
*/
|
||
|
|
struct regmap {
|
||
|
|
phys_addr_t base;
|
||
|
|
int range_count;
|
||
|
|
struct regmap_range *range, base_range;
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Interface to provide access to registers either through a direct memory
|
||
|
|
* bus or through a peripheral bus like I2C, SPI.
|
||
|
|
*/
|
||
|
|
int regmap_write(struct regmap *map, uint offset, uint val);
|
||
|
|
int regmap_read(struct regmap *map, uint offset, uint *valp);
|
||
|
|
|
||
|
|
#define regmap_write32(map, ptr, member, val) \
|
||
|
|
regmap_write(map, (uint32_t *)(ptr)->member - (uint32_t *)(ptr), val)
|
||
|
|
|
||
|
|
#define regmap_read32(map, ptr, member, valp) \
|
||
|
|
regmap_read(map, (uint32_t *)(ptr)->member - (uint32_t *)(ptr), valp)
|
||
|
|
|
||
|
|
/**
|
||
|
|
* regmap_init_mem() - Set up a new register map that uses memory access
|
||
|
|
*
|
||
|
|
* Use regmap_uninit() to free it.
|
||
|
|
*
|
||
|
|
* @dev: Device that uses this map
|
||
|
|
* @mapp: Returns allocated map
|
||
|
|
*/
|
||
|
|
int regmap_init_mem(struct udevice *dev, struct regmap **mapp);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* regmap_get_range() - Obtain the base memory address of a regmap range
|
||
|
|
*
|
||
|
|
* @map: Regmap to query
|
||
|
|
* @range_num: Range to look up
|
||
|
|
*/
|
||
|
|
void *regmap_get_range(struct regmap *map, unsigned int range_num);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* regmap_uninit() - free a previously inited regmap
|
||
|
|
*/
|
||
|
|
int regmap_uninit(struct regmap *map);
|
||
|
|
|
||
|
|
#endif
|