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      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