drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/i2c.h

   1 /* SPDX-License-Identifier: MIT */
   2 #ifndef __NVBIOS_I2C_H__
   3 #define __NVBIOS_I2C_H__
   4 enum dcb_i2c_type {
   5         /* matches bios type field prior to ccb 4.1 */
   6         DCB_I2C_NV04_BIT = 0x00,
   7         DCB_I2C_NV4E_BIT = 0x04,
   8         DCB_I2C_NVIO_BIT = 0x05,
   9         DCB_I2C_NVIO_AUX = 0x06,
  10         /* made up - mostly */
  11         DCB_I2C_PMGR     = 0x80,
  12         DCB_I2C_UNUSED   = 0xff
  13 };
  14
  15 struct dcb_i2c_entry {
  16         enum dcb_i2c_type type;
  17         u8 drive;
  18         u8 sense;
  19         u8 share;
  20         u8 auxch;
  21 };
  22
  23 u16 dcb_i2c_table(struct nvkm_bios *, u8 *ver, u8 *hdr, u8 *cnt, u8 *len);
  24 u16 dcb_i2c_entry(struct nvkm_bios *, u8 index, u8 *ver, u8 *len);
  25 int dcb_i2c_parse(struct nvkm_bios *, u8 index, struct dcb_i2c_entry *);
  26 #endif