1/* Copyright (c) 2013-2017 Jeffrey Pfau
  2 *
  3 * This Source Code Form is subject to the terms of the Mozilla Public
  4 * License, v. 2.0. If a copy of the MPL was not distributed with this
  5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  6#include <mgba/internal/ds/gx.h>
  7
  8#include <mgba/internal/ds/io.h>
  9
 10mLOG_DEFINE_CATEGORY(DS_GX, "DS GX");
 11
 12#define DS_GX_FIFO_SIZE 256
 13
 14static const int32_t _gxCommandCycleBase[DS_GX_CMD_MAX] = {
 15	[DS_GX_CMD_NOP] = 0,
 16	[DS_GX_CMD_MTX_MODE] = 2,
 17	[DS_GX_CMD_MTX_PUSH] = 34,
 18	[DS_GX_CMD_MTX_POP] = 72,
 19	[DS_GX_CMD_MTX_STORE] = 34,
 20	[DS_GX_CMD_MTX_RESTORE] = 72,
 21	[DS_GX_CMD_MTX_IDENTITY] = 38,
 22	[DS_GX_CMD_MTX_LOAD_4x4] = 68,
 23	[DS_GX_CMD_MTX_LOAD_4x3] = 60,
 24	[DS_GX_CMD_MTX_MULT_4x4] = 70,
 25	[DS_GX_CMD_MTX_MULT_4x3] = 62,
 26	[DS_GX_CMD_MTX_MULT_3x3] = 56,
 27	[DS_GX_CMD_MTX_SCALE] = 44,
 28	[DS_GX_CMD_MTX_TRANS] = 44,
 29	[DS_GX_CMD_COLOR] = 2,
 30	[DS_GX_CMD_NORMAL] = 18,
 31	[DS_GX_CMD_TEXCOORD] = 2,
 32	[DS_GX_CMD_VTX_16] = 18,
 33	[DS_GX_CMD_VTX_10] = 16,
 34	[DS_GX_CMD_VTX_XY] = 16,
 35	[DS_GX_CMD_VTX_XZ] = 16,
 36	[DS_GX_CMD_VTX_YZ] = 16,
 37	[DS_GX_CMD_VTX_DIFF] = 16,
 38	[DS_GX_CMD_POLYGON_ATTR] = 2,
 39	[DS_GX_CMD_TEXIMAGE_PARAM] = 2,
 40	[DS_GX_CMD_PLTT_BASE] = 2,
 41	[DS_GX_CMD_DIF_AMB] = 8,
 42	[DS_GX_CMD_SPE_EMI] = 8,
 43	[DS_GX_CMD_LIGHT_VECTOR] = 12,
 44	[DS_GX_CMD_LIGHT_COLOR] = 2,
 45	[DS_GX_CMD_SHININESS] = 64,
 46	[DS_GX_CMD_BEGIN_VTXS] = 2,
 47	[DS_GX_CMD_END_VTXS] = 2,
 48	[DS_GX_CMD_SWAP_BUFFERS] = 784,
 49	[DS_GX_CMD_VIEWPORT] = 2,
 50	[DS_GX_CMD_BOX_TEST] = 206,
 51	[DS_GX_CMD_POS_TEST] = 18,
 52	[DS_GX_CMD_VEC_TEST] = 10,
 53};
 54
 55void DSGXInit(struct DSGX* gx) {
 56	CircleBufferInit(&gx->fifo, sizeof(struct DSGXEntry) * DS_GX_FIFO_SIZE);
 57}
 58
 59void DSGXDeinit(struct DSGX* gx) {
 60	CircleBufferDeinit(&gx->fifo);
 61}
 62
 63void DSGXReset(struct DSGX* gx) {
 64	CircleBufferClear(&gx->fifo);
 65}
 66
 67uint16_t DSGXWriteRegister(struct DSGX* gx, uint32_t address, uint16_t value) {
 68	switch (address) {
 69	case DS9_REG_DISP3DCNT:
 70	case DS9_REG_GXSTAT_LO:
 71	case DS9_REG_GXSTAT_HI:
 72		mLOG(DS_GX, STUB, "Unimplemented GX write %03X:%04X", address, value);
 73		break;
 74	default:
 75		if (address < DS9_REG_GXFIFO_00) {
 76			mLOG(DS_GX, STUB, "Unimplemented GX write %03X:%04X", address, value);
 77		} else if (address < DS9_REG_GXSTAT_LO) {
 78			mLOG(DS_GX, STUB, "Unimplemented FIFO write %03X:%04X", address, value);
 79		} else {
 80			mLOG(DS_GX, STUB, "Unimplemented GX write %03X:%04X", address, value);
 81		}
 82		break;
 83	}
 84	return value;
 85}
 86
 87uint32_t DSGXWriteRegister32(struct DSGX* gx, uint32_t address, uint32_t value) {
 88	switch (address) {
 89	case DS9_REG_DISP3DCNT:
 90	case DS9_REG_GXSTAT_LO:
 91		mLOG(DS_GX, STUB, "Unimplemented GX write %03X:%04X", address, value);
 92		break;
 93	default:
 94		if (address < DS9_REG_GXFIFO_00) {
 95			mLOG(DS_GX, STUB, "Unimplemented GX write %03X:%04X", address, value);
 96		} else if (address < DS9_REG_GXSTAT_LO) {
 97			mLOG(DS_GX, STUB, "Unimplemented FIFO write %03X:%04X", address, value);
 98		} else {
 99			mLOG(DS_GX, STUB, "Unimplemented GX write %03X:%04X", address, value);
100		}
101		break;
102	}
103	return value;
104}