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/******************************************************************************
* i2cif.h
*
* I2C device I/O interface for Xen guest OSes.
*
* 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.
*
* Copyright 2018-2019 NXP
*
* Authors: Peng Fan <peng.fan@nxp.com>
*/
#ifndef __XEN_PUBLIC_IO_I2CIF_H__
#define __XEN_PUBLIC_IO_I2CIF_H__
#include <xen/interface/io/ring.h>
#include <xen/interface/grant_table.h>
#define I2CIF_BUF_LEN I2C_SMBUS_BLOCK_MAX + 2
#define I2CIF_MAX_MSG 2
#define I2CIF_M_RD 0x0001 /* read data, from slave to master */
/* I2C_M_RD is guaranteed to be 0x0001! */
#define I2CIF_M_TEN 0x0010 /* this is a ten bit chip address */
#define I2CIF_M_RECV_LEN 0x0400 /* length will be first received byte */
#define I2CIF_M_NO_RD_ACK 0x0800 /* if I2CIF_FUNC_PROTOCOL_MANGLING */
#define I2CIF_M_IGNORE_NAK 0x1000 /* if I2CIF_FUNC_PROTOCOL_MANGLING */
#define I2CIF_M_REV_DIR_ADDR 0x2000 /* if I2CIF_FUNC_PROTOCOL_MANGLING */
#define I2CIF_M_NOSTART 0x4000 /* if I2CIF_FUNC_NOSTART */
#define I2CIF_M_STOP 0x8000 /* if I2CIF_FUNC_PROTOCOL_MANGLING */
#define I2CIF_FUNC_I2C 0x00000001
#define I2CIF_FUNC_10BIT_ADDR 0x00000002
#define I2CIF_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_IGNORE_NAK etc. */
#define I2CIF_FUNC_SMBUS_PEC 0x00000008
#define I2CIF_FUNC_NOSTART 0x00000010 /* I2C_M_NOSTART */
#define I2CIF_FUNC_SLAVE 0x00000020
#define I2CIF_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */
#define I2CIF_FUNC_SMBUS_QUICK 0x00010000
#define I2CIF_FUNC_SMBUS_READ_BYTE 0x00020000
#define I2CIF_FUNC_SMBUS_WRITE_BYTE 0x00040000
#define I2CIF_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
#define I2CIF_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
#define I2CIF_FUNC_SMBUS_READ_WORD_DATA 0x00200000
#define I2CIF_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
#define I2CIF_FUNC_SMBUS_PROC_CALL 0x00800000
#define I2CIF_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
#define I2CIF_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
#define I2CIF_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */
#define I2CIF_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */
#define I2CIF_FUNC_SMBUS_HOST_NOTIFY 0x10000000
#define I2CIF_ADAPTER_NAME_LEN 32
struct i2cif_request {
struct {
__u16 addr; /* slave address */
__u16 flags; /* msg flags */
__u16 len; /* msg length */
} msg[I2CIF_MAX_MSG];
int num_msg;
__u8 write_buf[I2CIF_BUF_LEN];
bool is_smbus;
__u16 addr;
__u16 flags;
__u8 read_write;
__u8 command;
int protocol;
};
struct i2cif_response {
int result;
__u8 read_buf[I2CIF_BUF_LEN];
};
DEFINE_RING_TYPES(i2cif, struct i2cif_request, struct i2cif_response);
#endif
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