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