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controlfb.h
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1 /*
2  * controlfb_hw.h: Constants of all sorts for controlfb
3  *
4  * Copyright (C) 1998 Daniel Jacobowitz <[email protected]>
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License
8  * as published by the Free Software Foundation; either version
9  * 2 of the License, or (at your option) any later version.
10  *
11  * Based on an awful lot of code, including:
12  *
13  * control.c: Console support for PowerMac "control" display adaptor.
14  * Copyright (C) 1996 Paul Mackerras.
15  *
16  * The so far unpublished platinumfb.c
17  * Copyright (C) 1998 Jon Howell
18  */
19 
20 /*
21  * Structure of the registers for the RADACAL colormap device.
22  */
23 struct cmap_regs {
24  unsigned char addr; /* index for both cmap and misc registers */
25  char pad1[15];
26  unsigned char crsr; /* cursor palette */
27  char pad2[15];
28  unsigned char dat; /* RADACAL misc register data */
29  char pad3[15];
30  unsigned char lut; /* cmap data */
31  char pad4[15];
32 };
33 
34 /*
35  * Structure of the registers for the "control" display adaptor.
36  */
37 #define PAD(x) char x[12]
38 
39 struct preg { /* padded register */
40  unsigned r;
41  char pad[12];
42 };
43 
44 struct control_regs {
45  struct preg vcount; /* vertical counter */
46  /* Vertical parameters are in units of 1/2 scan line */
47  struct preg vswin; /* between vsblank and vssync */
48  struct preg vsblank; /* vert start blank */
49  struct preg veblank; /* vert end blank (display start) */
50  struct preg vewin; /* between vesync and veblank */
51  struct preg vesync; /* vert end sync */
52  struct preg vssync; /* vert start sync */
53  struct preg vperiod; /* vert period */
54  struct preg piped; /* pipe delay hardware cursor */
55  /* Horizontal params are in units of 2 pixels */
56  struct preg hperiod; /* horiz period - 2 */
57  struct preg hsblank; /* horiz start blank */
58  struct preg heblank; /* horiz end blank */
59  struct preg hesync; /* horiz end sync */
60  struct preg hssync; /* horiz start sync */
61  struct preg heq; /* half horiz sync len */
62  struct preg hlfln; /* half horiz period */
63  struct preg hserr; /* horiz period - horiz sync len */
64  struct preg cnttst;
65  struct preg ctrl; /* display control */
66  struct preg start_addr; /* start address: 5 lsbs zero */
67  struct preg pitch; /* addrs diff between scan lines */
68  struct preg mon_sense; /* monitor sense bits */
69  struct preg vram_attr; /* enable vram banks */
70  struct preg mode;
71  struct preg rfrcnt; /* refresh count */
72  struct preg intr_ena; /* interrupt enable */
73  struct preg intr_stat; /* interrupt status */
74  struct preg res[5];
75 };
76 
77 struct control_regints {
78  /* Vertical parameters are in units of 1/2 scan line */
79  unsigned vswin; /* between vsblank and vssync */
80  unsigned vsblank; /* vert start blank */
81  unsigned veblank; /* vert end blank (display start) */
82  unsigned vewin; /* between vesync and veblank */
83  unsigned vesync; /* vert end sync */
84  unsigned vssync; /* vert start sync */
85  unsigned vperiod; /* vert period */
86  unsigned piped; /* pipe delay hardware cursor */
87  /* Horizontal params are in units of 2 pixels */
88  /* Except, apparently, for hres > 1024 (or == 1280?) */
89  unsigned hperiod; /* horiz period - 2 */
90  unsigned hsblank; /* horiz start blank */
91  unsigned heblank; /* horiz end blank */
92  unsigned hesync; /* horiz end sync */
93  unsigned hssync; /* horiz start sync */
94  unsigned heq; /* half horiz sync len */
95  unsigned hlfln; /* half horiz period */
96  unsigned hserr; /* horiz period - horiz sync len */
97 };
98 
99 /*
100  * Dot clock rate is
101  * 3.9064MHz * 2**clock_params[2] * clock_params[1] / clock_params[0].
102  */
103 struct control_regvals {
104  unsigned regs[16]; /* for vswin .. hserr */
105  unsigned char mode;
106  unsigned char radacal_ctrl;
107  unsigned char clock_params[3];
108 };
109 
110 #define CTRLFB_OFF 16 /* position of pixel 0 in frame buffer */
111 
112 
113 /*
114  * Best cmode supported by control
115  */
116 struct max_cmodes {
117  int m[2]; /* 0: 2MB vram, 1: 4MB vram */
118 };
119 
120 /*
121  * Video modes supported by macmodes.c
122  */
123 static struct max_cmodes control_mac_modes[] = {
124  {{-1,-1}}, /* 512x384, 60Hz interlaced (NTSC) */
125  {{-1,-1}}, /* 512x384, 60Hz */
126  {{-1,-1}}, /* 640x480, 50Hz interlaced (PAL) */
127  {{-1,-1}}, /* 640x480, 60Hz interlaced (NTSC) */
128  {{ 2, 2}}, /* 640x480, 60Hz (VGA) */
129  {{ 2, 2}}, /* 640x480, 67Hz */
130  {{-1,-1}}, /* 640x870, 75Hz (portrait) */
131  {{-1,-1}}, /* 768x576, 50Hz (PAL full frame) */
132  {{ 2, 2}}, /* 800x600, 56Hz */
133  {{ 2, 2}}, /* 800x600, 60Hz */
134  {{ 2, 2}}, /* 800x600, 72Hz */
135  {{ 2, 2}}, /* 800x600, 75Hz */
136  {{ 1, 2}}, /* 832x624, 75Hz */
137  {{ 1, 2}}, /* 1024x768, 60Hz */
138  {{ 1, 2}}, /* 1024x768, 70Hz (or 72Hz?) */
139  {{ 1, 2}}, /* 1024x768, 75Hz (VESA) */
140  {{ 1, 2}}, /* 1024x768, 75Hz */
141  {{ 1, 2}}, /* 1152x870, 75Hz */
142  {{ 0, 1}}, /* 1280x960, 75Hz */
143  {{ 0, 1}}, /* 1280x1024, 75Hz */
144 };
145 
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