M7350/bootable/bootloader/lk/include/dev/i2c.h
2024-09-09 08:52:07 +00:00

40 lines
1.6 KiB
C

/*
* Copyright (c) 2008 Travis Geiselbrecht
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef __DEV_I2C_H
#define __DEV_I2C_H
void i2c_init(void);
void i2c_init_early(void);
/* send and receive blocks of data */
int i2c_transmit(int bus, uint8_t address, const void *buf, size_t count);
int i2c_receive(int bus, uint8_t address, void *buf, size_t count);
/* a few convenience routines based on the usual way of accessing 8 byte registers on i2c slave devices */
int i2c_write_reg(int bus, uint8_t address, uint8_t reg, uint8_t val);
int i2c_read_reg(int bus, uint8_t address, uint8_t reg, uint8_t *val);
#endif