1 /*	$NetBSD: bus.h,v 1.3 2021/12/18 23:45:40 riastradh Exp $	*/
2 
3 /* SPDX-License-Identifier: MIT */
4 #ifndef __NVKM_I2C_BUS_H__
5 #define __NVKM_I2C_BUS_H__
6 #include "pad.h"
7 
8 struct nvkm_i2c_bus_func {
9 	void (*init)(struct nvkm_i2c_bus *);
10 	void (*drive_scl)(struct nvkm_i2c_bus *, int state);
11 	void (*drive_sda)(struct nvkm_i2c_bus *, int state);
12 	int (*sense_scl)(struct nvkm_i2c_bus *);
13 	int (*sense_sda)(struct nvkm_i2c_bus *);
14 	int (*xfer)(struct nvkm_i2c_bus *, struct i2c_msg *, int num);
15 };
16 
17 int nvkm_i2c_bus_ctor(const struct nvkm_i2c_bus_func *, struct nvkm_i2c_pad *,
18 		      int id, struct nvkm_i2c_bus *);
19 int nvkm_i2c_bus_new_(const struct nvkm_i2c_bus_func *, struct nvkm_i2c_pad *,
20 		      int id, struct nvkm_i2c_bus **);
21 void nvkm_i2c_bus_del(struct nvkm_i2c_bus **);
22 void nvkm_i2c_bus_init(struct nvkm_i2c_bus *);
23 void nvkm_i2c_bus_fini(struct nvkm_i2c_bus *);
24 
25 int nvkm_i2c_bit_xfer(struct nvkm_i2c_bus *, struct i2c_msg *, int);
26 
27 int nv04_i2c_bus_new(struct nvkm_i2c_pad *, int, u8, u8,
28 		     struct nvkm_i2c_bus **);
29 
30 int nv4e_i2c_bus_new(struct nvkm_i2c_pad *, int, u8, struct nvkm_i2c_bus **);
31 int nv50_i2c_bus_new(struct nvkm_i2c_pad *, int, u8, struct nvkm_i2c_bus **);
32 int gf119_i2c_bus_new(struct nvkm_i2c_pad *, int, u8, struct nvkm_i2c_bus **);
33 
34 #define BUS_MSG(b,l,f,a...) do {                                               \
35 	struct nvkm_i2c_bus *_bus = (b);                                       \
36 	nvkm_##l(&_bus->pad->i2c->subdev, "bus %04x: "f"\n", _bus->id, ##a);   \
37 } while(0)
38 #define BUS_ERR(b,f,a...) BUS_MSG((b), error, f, ##a)
39 #define BUS_DBG(b,f,a...) BUS_MSG((b), debug, f, ##a)
40 #define BUS_TRACE(b,f,a...) BUS_MSG((b), trace, f, ##a)
41 #endif
42