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 40int vsc_tp_request_irq(struct vsc_tp *tp); 41void vsc_tp_free_irq(struct vsc_tp *tp); 42 43void vsc_tp_intr_enable(struct vsc_tp *tp); 44void vsc_tp_intr_disable(struct vsc_tp *tp); 45void vsc_tp_intr_synchronize(struct vsc_tp *tp); 46 47void vsc_tp_reset(struct vsc_tp *tp); 48 49bool vsc_tp_need_read(struct vsc_tp *tp); 50 51int vsc_tp_init(struct vsc_tp *tp, struct device *dev); 52 53#endif 54