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12 * The so far unpublished platinumfb.c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 */
19 struct 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
35 struct preg { /* padded register */
36 unsigned r;
37 char pad[12];
38 };
39
40 struct 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
73 struct 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 */
99 struct 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 */
112 struct max_cmodes {
113 int m[2]; /* 0: 2MB vram, 1: 4MB vram */
114 };
115
116 /*
117 * Video modes supported by macmodes.c
118 */
119 static 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