subdev/i2c/bus.h

0001 /* SPDX-License-Identifier: MIT */
0002 #ifndef __NVKM_I2C_BUS_H__
0003 #define __NVKM_I2C_BUS_H__
0004 #include "pad.h"
0005
0006 struct nvkm_i2c_bus_func {
0007     void (*init)(struct nvkm_i2c_bus *);
0008     void (*drive_scl)(struct nvkm_i2c_bus *, int state);
0009     void (*drive_sda)(struct nvkm_i2c_bus *, int state);
0010     int (*sense_scl)(struct nvkm_i2c_bus *);
0011     int (*sense_sda)(struct nvkm_i2c_bus *);
0012     int (*xfer)(struct nvkm_i2c_bus *, struct i2c_msg *, int num);
0013 };
0014
0015 int nvkm_i2c_bus_ctor(const struct nvkm_i2c_bus_func *, struct nvkm_i2c_pad *,
0016               int id, struct nvkm_i2c_bus *);
0017 int nvkm_i2c_bus_new_(const struct nvkm_i2c_bus_func *, struct nvkm_i2c_pad *,
0018               int id, struct nvkm_i2c_bus **);
0019 void nvkm_i2c_bus_del(struct nvkm_i2c_bus **);
0020 void nvkm_i2c_bus_init(struct nvkm_i2c_bus *);
0021 void nvkm_i2c_bus_fini(struct nvkm_i2c_bus *);
0022
0023 int nvkm_i2c_bit_xfer(struct nvkm_i2c_bus *, struct i2c_msg *, int);
0024
0025 int nv04_i2c_bus_new(struct nvkm_i2c_pad *, int, u8, u8,
0026              struct nvkm_i2c_bus **);
0027
0028 int nv4e_i2c_bus_new(struct nvkm_i2c_pad *, int, u8, struct nvkm_i2c_bus **);
0029 int nv50_i2c_bus_new(struct nvkm_i2c_pad *, int, u8, struct nvkm_i2c_bus **);
0030 int gf119_i2c_bus_new(struct nvkm_i2c_pad *, int, u8, struct nvkm_i2c_bus **);
0031
0032 #define BUS_MSG(b,l,f,a...) do {                                               \
0033     struct nvkm_i2c_bus *_bus = (b);                                       \
0034     nvkm_##l(&_bus->pad->i2c->subdev, "bus %04x: "f"\n", _bus->id, ##a);   \
0035 } while(0)
0036 #define BUS_ERR(b,f,a...) BUS_MSG((b), error, f, ##a)
0037 #define BUS_DBG(b,f,a...) BUS_MSG((b), debug, f, ##a)
0038 #define BUS_TRACE(b,f,a...) BUS_MSG((b), trace, f, ##a)
0039 #endif