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      1 /*	$NetBSD: vga.h,v 1.3 2021/12/18 23:45:33 riastradh Exp $	*/
      2 
      3 /* SPDX-License-Identifier: MIT */
      4 #ifndef __NOUVEAU_VGA_H__
      5 #define __NOUVEAU_VGA_H__
      6 #include <core/subdev.h>
      7 
      8 /* access to various legacy io ports */
      9 u8   nvkm_rdport(struct nvkm_device *, int head, u16 port);
     10 void nvkm_wrport(struct nvkm_device *, int head, u16 port, u8 value);
     11 
     12 /* VGA Sequencer */
     13 u8   nvkm_rdvgas(struct nvkm_device *, int head, u8 index);
     14 void nvkm_wrvgas(struct nvkm_device *, int head, u8 index, u8 value);
     15 
     16 /* VGA Graphics */
     17 u8   nvkm_rdvgag(struct nvkm_device *, int head, u8 index);
     18 void nvkm_wrvgag(struct nvkm_device *, int head, u8 index, u8 value);
     19 
     20 /* VGA CRTC */
     21 u8   nvkm_rdvgac(struct nvkm_device *, int head, u8 index);
     22 void nvkm_wrvgac(struct nvkm_device *, int head, u8 index, u8 value);
     23 
     24 /* VGA indexed port access dispatcher */
     25 u8   nvkm_rdvgai(struct nvkm_device *, int head, u16 port, u8 index);
     26 void nvkm_wrvgai(struct nvkm_device *, int head, u16 port, u8 index, u8 value);
     27 
     28 bool nvkm_lockvgac(struct nvkm_device *, bool lock);
     29 u8   nvkm_rdvgaowner(struct nvkm_device *);
     30 void nvkm_wrvgaowner(struct nvkm_device *, u8);
     31 #endif
     32