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LF-191-1 xen: interface: introduce i2cif
Introduce i2cif from xen. This will be used by paravirtualization i2c driver. Signed-off-by: Peng Fan <peng.fan@nxp.com> Acked-by: Leonard Crestez <leonard.crestez@nxp.com>
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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> | ||
*/ | ||
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#ifndef __XEN_PUBLIC_IO_I2CIF_H__ | ||
#define __XEN_PUBLIC_IO_I2CIF_H__ | ||
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#include <xen/interface/io/ring.h> | ||
#include <xen/interface/grant_table.h> | ||
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#define I2CIF_BUF_LEN 32 | ||
#define I2CIF_MAX_MSG 2 | ||
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#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 */ | ||
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#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 | ||
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#define I2CIF_ADAPTER_NAME_LEN 32 | ||
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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]; | ||
}; | ||
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struct i2cif_response { | ||
int result; | ||
__u8 read_buf[I2CIF_BUF_LEN]; | ||
}; | ||
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DEFINE_RING_TYPES(i2cif, struct i2cif_request, struct i2cif_response); | ||
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#endif |