| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later WITH Linux-syscall-note */ |
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| 2 | /* |
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| 3 | * Definitions for virtio I2C Adpter |
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| 4 | * |
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| 5 | * Copyright (c) 2021 Intel Corporation. All rights reserved. |
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| 6 | */ |
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| 7 | |
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| 8 | #ifndef _UAPI_LINUX_VIRTIO_I2C_H |
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| 9 | #define _UAPI_LINUX_VIRTIO_I2C_H |
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| 10 | |
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| 11 | #include <linux/const.h> |
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| 12 | #include <linux/types.h> |
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| 13 | |
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| 14 | /* Virtio I2C Feature bits */ |
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| 15 | #define VIRTIO_I2C_F_ZERO_LENGTH_REQUEST 0 |
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| 16 | |
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| 17 | /* The bit 0 of the @virtio_i2c_out_hdr.@flags, used to group the requests */ |
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| 18 | #define VIRTIO_I2C_FLAGS_FAIL_NEXT _BITUL(0) |
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| 19 | |
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| 20 | /* The bit 1 of the @virtio_i2c_out_hdr.@flags, used to mark a buffer as read */ |
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| 21 | #define VIRTIO_I2C_FLAGS_M_RD _BITUL(1) |
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| 22 | |
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| 23 | /** |
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| 24 | * struct virtio_i2c_out_hdr - the virtio I2C message OUT header |
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| 25 | * @addr: the controlled device address |
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| 26 | * @padding: used to pad to full dword |
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| 27 | * @flags: used for feature extensibility |
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| 28 | */ |
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| 29 | struct virtio_i2c_out_hdr { |
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| 30 | __le16 addr; |
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| 31 | __le16 padding; |
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| 32 | __le32 flags; |
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| 33 | }; |
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| 34 | |
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| 35 | /** |
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| 36 | * struct virtio_i2c_in_hdr - the virtio I2C message IN header |
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| 37 | * @status: the processing result from the backend |
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| 38 | */ |
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| 39 | struct virtio_i2c_in_hdr { |
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| 40 | __u8 status; |
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| 41 | }; |
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| 42 | |
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| 43 | /* The final status written by the device */ |
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| 44 | #define VIRTIO_I2C_MSG_OK 0 |
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| 45 | #define VIRTIO_I2C_MSG_ERR 1 |
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| 46 | |
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| 47 | #endif /* _UAPI_LINUX_VIRTIO_I2C_H */ |
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| 48 | |
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