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Diffstat (limited to 'include/xen/interface/io/i2cif.h')
-rw-r--r-- | include/xen/interface/io/i2cif.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/include/xen/interface/io/i2cif.h b/include/xen/interface/io/i2cif.h new file mode 100644 index 000000000000..c504670429d0 --- /dev/null +++ b/include/xen/interface/io/i2cif.h @@ -0,0 +1,95 @@ +/****************************************************************************** + * 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 |