hcrx_cursor.c revision 1f9ea1ac 
1/* $NetBSD: hcrx_cursor.c,v 1.1 2025/12/22 13:07:11 macallan Exp $ */
2/*
3 * Copyright (c) 2025 Michael Lorenz
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 *    - Redistributions of source code must retain the above copyright
11 *      notice, this list of conditions and the following disclaimer.
12 *    - Redistributions in binary form must reproduce the above
13 *      copyright notice, this list of conditions and the following
14 *      disclaimer in the documentation and/or other materials provided
15 *      with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
20 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
21 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
27 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 *
30 */
31
32#include <sys/types.h>
33#include <dev/ic/nglereg.h>
34#include "ngle.h"
35
36static void HCRXLoadCursorImage(ScrnInfoPtr pScrn, unsigned char *src);
37static void HCRXSetCursorPosition(ScrnInfoPtr pScrn, int x, int y);
38static void HCRXSetCursorColors(ScrnInfoPtr pScrn, int bg, int fg);
39
40static void
41HCRXLoadCursorImage(ScrnInfoPtr pScrn, unsigned char *src)
42{
43	NGLEPtr pNGLE = NGLEPTR(pScrn);
44	uint32_t latch;
45	int i;
46
47	/* image first */
48	NGLEWrite4(pNGLE, NGLE_HCRX_CURSOR_ADDR, 0x80);
49	for (i = 0; i < 128; i++) {
50		memcpy(&latch, src, 4);
51		NGLEWrite4(pNGLE, NGLE_HCRX_CURSOR_DATA, latch);
52		src += 4;
53	}
54
55	/* and now the mask */
56	NGLEWrite4(pNGLE, NGLE_HCRX_CURSOR_ADDR, 0);
57	for (i = 0; i < 128; i++) {
58		memcpy(&latch, src, 4);
59		NGLEWrite4(pNGLE, NGLE_HCRX_CURSOR_DATA, latch);
60		src += 4;
61	}
62}
63
64void
65HCRXShowCursor(ScrnInfoPtr pScrn)
66{
67	NGLEPtr pNGLE = NGLEPTR(pScrn);
68
69	pNGLE->cursor.enable = 1;
70	NGLEWrite4(pNGLE, NGLE_HCRX_CURSOR, pNGLE->creg | HCRX_ENABLE_CURSOR);
71}
72
73void
74HCRXHideCursor(ScrnInfoPtr pScrn)
75{
76	NGLEPtr pNGLE = NGLEPTR(pScrn);
77
78	pNGLE->cursor.enable = 0;
79	NGLEWrite4(pNGLE, NGLE_HCRX_CURSOR, pNGLE->creg);
80}
81
82static void
83HCRXSetCursorPosition(ScrnInfoPtr pScrn, int x, int y)
84{
85	NGLEPtr pNGLE = NGLEPTR(pScrn);
86
87	if (x < 0)
88		x = 0x1000 - x;
89	if (y < 0)
90		y = 0x1000 - y;
91	pNGLE->creg = (x << 16) | y;
92	NGLEWrite4(pNGLE, NGLE_HCRX_CURSOR, pNGLE->creg |
93	    (pNGLE->cursor.enable ? HCRX_ENABLE_CURSOR : 0));
94}
95
96static void
97HCRXSetCursorColors(ScrnInfoPtr pScrn, int bg, int fg)
98{
99	NGLEPtr pNGLE = NGLEPTR(pScrn);
100	uint8_t stat;
101
102	do {
103		stat = NGLERead1(pNGLE, NGLE_BUSY);
104		if (stat == 0)
105			stat = NGLERead1(pNGLE, NGLE_BUSY);
106	} while (stat != 0);
107
108	NGLEWrite4(pNGLE, NGLE_BAboth,
109	  BA(FractDcd, Otc01, Ots08, Addr24, 0, BINcmap, 0));
110	NGLEWrite4(pNGLE, NGLE_IBO,
111	  IBOvals(RopSrc, 0, BitmapExtent08, 0, DataDynamic, MaskOtc, 0, 0));
112	NGLEWrite4(pNGLE, NGLE_PLANEMASK, 0xffffffff);
113	NGLEWrite4(pNGLE, NGLE_BINC_DST, 0);
114	NGLEWrite4(pNGLE, NGLE_BINC_DATA_R, bg);
115	NGLEWrite4(pNGLE, NGLE_BINC_DATA_R, fg);
116	NGLEWrite4(pNGLE, NGLE_BINC_SRC, 0);
117	NGLEWrite4(pNGLE, NGLE_HCRX_LUTBLT, LBC_ENABLE | LBC_TYPE_CURSOR | 4);
118	pNGLE->hwmode = -1;
119}
120
121Bool
122HCRXSetupCursor(ScreenPtr pScreen)
123{
124	ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
125	NGLEPtr pNGLE = NGLEPTR(pScrn);
126	xf86CursorInfoPtr infoPtr;
127
128	pNGLE->cursor.enable = 0;
129	pNGLE->creg = 0;
130
131	infoPtr = xf86CreateCursorInfoRec();
132	if(!infoPtr) return FALSE;
133
134	pNGLE->CursorInfoRec = infoPtr;
135
136	xf86Msg(X_INFO, "HCRX HW cursor enabled\n");
137
138	infoPtr->MaxWidth = 64;
139	infoPtr->MaxHeight = 64;
140	pNGLE->maskoffset = 8 * 64;
141
142	infoPtr->Flags = HARDWARE_CURSOR_AND_SOURCE_WITH_MASK |
143	    HARDWARE_CURSOR_TRUECOLOR_AT_8BPP;
144
145	infoPtr->SetCursorColors = HCRXSetCursorColors;
146	infoPtr->SetCursorPosition = HCRXSetCursorPosition;
147	infoPtr->LoadCursorImage = HCRXLoadCursorImage;
148	infoPtr->HideCursor = HCRXHideCursor;
149	infoPtr->ShowCursor = HCRXShowCursor;
150	infoPtr->UseHWCursor = NULL;
151
152	return xf86InitCursor(pScreen, infoPtr);
153}
154