Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (c) 2023, Intel Corporation.
4 * Intel Visual Sensing Controller Transport Layer Linux driver
5 */
6
7#ifndef _VSC_TP_H_
8#define _VSC_TP_H_
9
10#include <linux/types.h>
11
12#define VSC_TP_CMD_WRITE 0x01
13#define VSC_TP_CMD_READ 0x02
14
15#define VSC_TP_CMD_ACK 0x10
16#define VSC_TP_CMD_NACK 0x11
17#define VSC_TP_CMD_BUSY 0x12
18
19struct vsc_tp;
20
21/**
22 * typedef vsc_event_cb_t - event callback function signature
23 * @context: the execution context of who registered this callback
24 *
25 * The callback function is called in interrupt context and the data
26 * payload is only valid during the call. If the user needs access
27 * the data payload later, it must copy the payload.
28 */
29typedef void (*vsc_tp_event_cb_t)(void *context);
30
31int vsc_tp_rom_xfer(struct vsc_tp *tp, const void *obuf, void *ibuf,
32 size_t len);
33
34int vsc_tp_xfer(struct vsc_tp *tp, u8 cmd, const void *obuf, size_t olen,
35 void *ibuf, size_t ilen);
36
37int vsc_tp_register_event_cb(struct vsc_tp *tp, vsc_tp_event_cb_t event_cb,
38 void *context);
39
40void vsc_tp_intr_enable(struct vsc_tp *tp);
41void vsc_tp_intr_disable(struct vsc_tp *tp);
42void vsc_tp_intr_synchronize(struct vsc_tp *tp);
43
44void vsc_tp_reset(struct vsc_tp *tp);
45
46bool vsc_tp_need_read(struct vsc_tp *tp);
47
48int vsc_tp_init(struct vsc_tp *tp, struct device *dev);
49
50#endif