drivers/gpu/drm/nouveau/nvkm/subdev/i2c/bus.h

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