Annotation of sys/arch/sparc/dev/btreg.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: btreg.h,v 1.5 2007/05/29 09:54:05 sobrado Exp $ */
! 2: /* $NetBSD: btreg.h,v 1.4 1996/02/27 22:09:21 thorpej Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1993
! 6: * The Regents of the University of California. All rights reserved.
! 7: *
! 8: * This software was developed by the Computer Systems Engineering group
! 9: * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
! 10: * contributed to Berkeley.
! 11: *
! 12: * All advertising materials mentioning features or use of this software
! 13: * must display the following acknowledgement:
! 14: * This product includes software developed by the University of
! 15: * California, Lawrence Berkeley Laboratory.
! 16: *
! 17: * Redistribution and use in source and binary forms, with or without
! 18: * modification, are permitted provided that the following conditions
! 19: * are met:
! 20: * 1. Redistributions of source code must retain the above copyright
! 21: * notice, this list of conditions and the following disclaimer.
! 22: * 2. Redistributions in binary form must reproduce the above copyright
! 23: * notice, this list of conditions and the following disclaimer in the
! 24: * documentation and/or other materials provided with the distribution.
! 25: * 3. Neither the name of the University nor the names of its contributors
! 26: * may be used to endorse or promote products derived from this software
! 27: * without specific prior written permission.
! 28: *
! 29: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 30: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 31: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 32: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 33: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 34: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 35: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 36: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 37: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 38: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 39: * SUCH DAMAGE.
! 40: *
! 41: * @(#)btreg.h 8.2 (Berkeley) 1/21/94
! 42: */
! 43:
! 44: /*
! 45: * Several Sun color frame buffers use some kind of Brooktree video
! 46: * DAC (e.g., the Bt458, -- in any case, Brooktree make the only
! 47: * decent color frame buffer chips).
! 48: *
! 49: * Color map control on these is a bit funky in a SPARCstation.
! 50: * To update the color map one would normally do byte writes, but
! 51: * the hardware takes longword writes. Since there are three
! 52: * registers for each color map entry (R, then G, then B), we have
! 53: * to set color 1 with a write to address 0 (setting 0's R/G/B and
! 54: * color 1's R) followed by a second write to address 1 (setting
! 55: * color 1's G/B and color 2's R/G). Software must therefore keep
! 56: * a copy of the current map.
! 57: *
! 58: * The colormap address register increments automatically, so the
! 59: * above write is done as:
! 60: *
! 61: * bt->bt_addr = 0;
! 62: * bt->bt_cmap = R0G0B0R1;
! 63: * bt->bt_cmap = G1B1R2G2;
! 64: * ...
! 65: *
! 66: * Yow!
! 67: *
! 68: * Bonus complication: on the cg6, only the top 8 bits of each 32 bit
! 69: * register matter, even though the cg3 takes all the bits from all
! 70: * bytes written to it.
! 71: */
! 72: struct bt_regs {
! 73: u_int bt_addr; /* map address register */
! 74: u_int bt_cmap; /* colormap data register */
! 75: u_int bt_ctrl; /* control register */
! 76: u_int bt_omap; /* overlay (cursor) map register */
! 77: };
! 78: #define BT_INIT(bt, shift) do { /* whatever this means.. */ \
! 79: (bt)->bt_addr = 0x06 << (shift); /* command reg */ \
! 80: (bt)->bt_ctrl = 0x73 << (shift); /* overlay plane */ \
! 81: (bt)->bt_addr = 0x04 << (shift); /* read mask */ \
! 82: (bt)->bt_ctrl = 0xff << (shift); /* color planes */ \
! 83: } while(0)
! 84: #define BT_UNBLANK(bt, x, shift) do { \
! 85: /* restore color 0 (and R of color 1) */ \
! 86: (bt)->bt_addr = 0 << (shift); \
! 87: (bt)->bt_cmap = (x); \
! 88: if ((shift)) { \
! 89: (bt)->bt_cmap = (x) << 8; \
! 90: (bt)->bt_cmap = (x) << 16; \
! 91: /* restore read mask */ \
! 92: BT_INIT((bt), (shift)); \
! 93: } while(0)
! 94: #define BT_BLANK(bt, shift) do { \
! 95: (bt)->bt_addr = 0x06 << (shift); /* command reg */ \
! 96: (bt)->bt_ctrl = 0x70 << (shift); /* overlay plane */ \
! 97: (bt)->bt_addr = 0x04 << (shift); /* read mask */ \
! 98: (bt)->bt_ctrl = 0x00 << (shift); /* color planes */ \
! 99: /* Set color 0 to black -- note that this overwrites R of color 1. */\
! 100: (bt)->bt_addr = 0 << (shift); \
! 101: (bt)->bt_cmap = 0 << (shift); \
! 102: /* restore read mask */ \
! 103: BT_INIT((bt), (shift)); \
! 104: } while(0)
! 105:
! 106:
! 107: /*
! 108: * SBus framebuffer control look like this (usually at offset 0x400000).
! 109: */
! 110: struct fbcontrol {
! 111: struct bt_regs fbc_dac;
! 112: u_char fbc_ctrl;
! 113: u_char fbc_status;
! 114: u_char fbc_cursor_start;
! 115: u_char fbc_cursor_end;
! 116: u_char fbc_vcontrol[12]; /* 12 bytes of video timing goo */
! 117: };
! 118: /* fbc_ctrl bits: */
! 119: #define FBC_IENAB 0x80 /* Interrupt enable */
! 120: #define FBC_VENAB 0x40 /* Video enable */
! 121: #define FBC_TIMING 0x20 /* Master timing enable */
! 122: #define FBC_CURSOR 0x10 /* Cursor compare enable */
! 123: #define FBC_XTALMSK 0x0c /* Xtal select (0,1,2,test) */
! 124: #define FBC_DIVMSK 0x03 /* Divisor (1,2,3,4) */
! 125:
! 126: /* fbc_status bits: */
! 127: #define FBS_INTR 0x80 /* Interrupt pending */
! 128: #define FBS_MSENSE 0x70 /* Monitor sense mask */
! 129: #define FBS_1024X768 0x10
! 130: #define FBS_1152X900 0x30
! 131: #define FBS_1280X1024 0x40
! 132: #define FBS_1600X1280 0x50
! 133: #define FBS_ID_MASK 0x0f /* ID mask */
! 134: #define FBS_ID_COLOR 0x01
! 135: #define FBS_ID_MONO 0x02
! 136: #define FBS_ID_MONO_ECL 0x03 /* ? */
! 137:
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