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 19 struct 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 */ 29 typedef void (*vsc_tp_event_cb_t)(void *context); 30 31 int vsc_tp_rom_xfer(struct vsc_tp *tp, const void *obuf, void *ibuf, 32 size_t len); 33 34 int vsc_tp_xfer(struct vsc_tp *tp, u8 cmd, const void *obuf, size_t olen, 35 void *ibuf, size_t ilen); 36 37 int vsc_tp_register_event_cb(struct vsc_tp *tp, vsc_tp_event_cb_t event_cb, 38 void *context); 39 40 int vsc_tp_request_irq(struct vsc_tp *tp); 41 void vsc_tp_free_irq(struct vsc_tp *tp); 42 43 void vsc_tp_intr_enable(struct vsc_tp *tp); 44 void vsc_tp_intr_disable(struct vsc_tp *tp); 45 void vsc_tp_intr_synchronize(struct vsc_tp *tp); 46 47 void vsc_tp_reset(struct vsc_tp *tp); 48 49 bool vsc_tp_need_read(struct vsc_tp *tp); 50 51 int vsc_tp_init(struct vsc_tp *tp, struct device *dev); 52 53 #endif 54