1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * controlfb_hw.h: Constants of all sorts for controlfb
4 *
5 * Copyright (C) 1998 Daniel Jacobowitz <dan@debian.org>
6 *
7 * Based on an awful lot of code, including:
8 *
9 * control.c: Console support for PowerMac "control" display adaptor.
10 * Copyright (C) 1996 Paul Mackerras.
11 *
12 * The so far unpublished platinumfb.c
13 * Copyright (C) 1998 Jon Howell
14 */
15
16/*
17 * Structure of the registers for the RADACAL colormap device.
18 */
19struct cmap_regs {
20	unsigned char addr;	/* index for both cmap and misc registers */
21	char pad1[15];
22	unsigned char crsr;	/* cursor palette */
23	char pad2[15];
24	unsigned char dat;	/* RADACAL misc register data */
25	char pad3[15];
26	unsigned char lut;	/* cmap data */
27	char pad4[15];
28};
29
30/*
31 * Structure of the registers for the "control" display adaptor.
32 */
33#define PAD(x)	char x[12]
34
35struct preg {			/* padded register */
36	unsigned r;
37	char pad[12];
38};
39
40struct control_regs {
41	struct preg vcount;	/* vertical counter */
42	/* Vertical parameters are in units of 1/2 scan line */
43	struct preg vswin;	/* between vsblank and vssync */
44	struct preg vsblank;	/* vert start blank */
45	struct preg veblank;	/* vert end blank (display start) */
46	struct preg vewin;	/* between vesync and veblank */
47	struct preg vesync;	/* vert end sync */
48	struct preg vssync;	/* vert start sync */
49	struct preg vperiod;	/* vert period */
50	struct preg piped;	/* pipe delay hardware cursor */
51	/* Horizontal params are in units of 2 pixels */
52	struct preg hperiod;	/* horiz period - 2 */
53	struct preg hsblank;	/* horiz start blank */
54	struct preg heblank;	/* horiz end blank */
55	struct preg hesync;	/* horiz end sync */
56	struct preg hssync;	/* horiz start sync */
57	struct preg heq;	/* half horiz sync len */
58	struct preg hlfln;	/* half horiz period */
59	struct preg hserr;	/* horiz period - horiz sync len */
60	struct preg cnttst;
61	struct preg ctrl;	/* display control */
62	struct preg start_addr;	/* start address: 5 lsbs zero */
63	struct preg pitch;	/* addrs diff between scan lines */
64	struct preg mon_sense;	/* monitor sense bits */
65	struct preg vram_attr;	/* enable vram banks */
66	struct preg mode;
67	struct preg rfrcnt;	/* refresh count */
68	struct preg intr_ena;	/* interrupt enable */
69	struct preg intr_stat;	/* interrupt status */
70	struct preg res[5];
71};
72
73struct control_regints {
74	/* Vertical parameters are in units of 1/2 scan line */
75	unsigned vswin;	/* between vsblank and vssync */
76	unsigned vsblank;	/* vert start blank */
77	unsigned veblank;	/* vert end blank (display start) */
78	unsigned vewin;	/* between vesync and veblank */
79	unsigned vesync;	/* vert end sync */
80	unsigned vssync;	/* vert start sync */
81	unsigned vperiod;	/* vert period */
82	unsigned piped;		/* pipe delay hardware cursor */
83	/* Horizontal params are in units of 2 pixels */
84	/* Except, apparently, for hres > 1024 (or == 1280?) */
85	unsigned hperiod;	/* horiz period - 2 */
86	unsigned hsblank;	/* horiz start blank */
87	unsigned heblank;	/* horiz end blank */
88	unsigned hesync;	/* horiz end sync */
89	unsigned hssync;	/* horiz start sync */
90	unsigned heq;		/* half horiz sync len */
91	unsigned hlfln;		/* half horiz period */
92	unsigned hserr;		/* horiz period - horiz sync len */
93};
94
95/*
96 * Dot clock rate is
97 * 3.9064MHz * 2**clock_params[2] * clock_params[1] / clock_params[0].
98 */
99struct control_regvals {
100	unsigned regs[16];		/* for vswin .. hserr */
101	unsigned char mode;
102	unsigned char radacal_ctrl;
103	unsigned char clock_params[3];
104};
105
106#define CTRLFB_OFF 16	/* position of pixel 0 in frame buffer */
107
108
109/*
110 * Best cmode supported by control
111 */
112struct max_cmodes {
113	int m[2];	/* 0: 2MB vram, 1: 4MB vram */
114};
115
116/*
117 * Video modes supported by macmodes.c
118 */
119static struct max_cmodes control_mac_modes[] = {
120	{{-1,-1}},	/* 512x384, 60Hz interlaced (NTSC) */
121	{{-1,-1}},	/* 512x384, 60Hz */
122	{{-1,-1}},	/* 640x480, 50Hz interlaced (PAL) */
123	{{-1,-1}},	/* 640x480, 60Hz interlaced (NTSC) */
124	{{ 2, 2}},	/* 640x480, 60Hz (VGA) */
125	{{ 2, 2}},	/* 640x480, 67Hz */
126	{{-1,-1}},	/* 640x870, 75Hz (portrait) */
127	{{-1,-1}},	/* 768x576, 50Hz (PAL full frame) */
128	{{ 2, 2}},	/* 800x600, 56Hz */
129	{{ 2, 2}},	/* 800x600, 60Hz */
130	{{ 2, 2}},	/* 800x600, 72Hz */
131	{{ 2, 2}},	/* 800x600, 75Hz */
132	{{ 1, 2}},	/* 832x624, 75Hz */
133	{{ 1, 2}},	/* 1024x768, 60Hz */
134	{{ 1, 2}},	/* 1024x768, 70Hz (or 72Hz?) */
135	{{ 1, 2}},	/* 1024x768, 75Hz (VESA) */
136	{{ 1, 2}},	/* 1024x768, 75Hz */
137	{{ 1, 2}},	/* 1152x870, 75Hz */
138	{{ 0, 1}},	/* 1280x960, 75Hz */
139	{{ 0, 1}},	/* 1280x1024, 75Hz */
140	{{ 1, 2}},	/* 1152x768, 60Hz */
141	{{ 0, 1}},	/* 1600x1024, 60Hz */
142};
143
144