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1.1 root 1: /*
2: * Copyright (c) 1988 University of Utah.
3: * Copyright (c) 1990 The Regents of the University of California.
4: * All rights reserved.
5: *
6: * This code is derived from software contributed to Berkeley by
7: * the Systems Programming Group of the University of Utah Computer
8: * Science Department.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed by the University of
21: * California, Berkeley and its contributors.
22: * 4. Neither the name of the University nor the names of its contributors
23: * may be used to endorse or promote products derived from this software
24: * without specific prior written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36: * SUCH DAMAGE.
37: *
38: * from: Utah $Hdr: grf_tc.c 1.18 91/04/02$
39: *
40: * @(#)grf_tc.c 7.4 (Berkeley) 5/7/91
41: */
42:
43: #include "grf.h"
44: #if NGRF > 0
45:
46: /*
47: * Graphics routines for TOPCAT frame buffer
48: */
49: #include "sys/param.h"
50: #include "sys/errno.h"
51:
52: #include "grfioctl.h"
53: #include "grfvar.h"
54: #include "grf_tcreg.h"
55:
56: #include "../include/cpu.h"
57:
58: /*
59: * Initialize hardware.
60: * Must fill in the grfinfo structure in g_softc.
61: * Returns 0 if hardware not present, non-zero ow.
62: */
63: tc_init(gp, addr)
64: struct grf_softc *gp;
65: caddr_t addr;
66: {
67: register struct tcboxfb *tp = (struct tcboxfb *) addr;
68: struct grfinfo *gi = &gp->g_display;
69: volatile u_char *fbp;
70: u_char save;
71: int fboff;
72: extern caddr_t sctopa(), iomap();
73:
74: if (ISIIOVA(addr))
75: gi->gd_regaddr = (caddr_t) IIOP(addr);
76: else
77: gi->gd_regaddr = sctopa(vatosc(addr));
78: gi->gd_regsize = 0x10000;
79: gi->gd_fbwidth = (tp->fbwmsb << 8) | tp->fbwlsb;
80: gi->gd_fbheight = (tp->fbhmsb << 8) | tp->fbhlsb;
81: gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight;
82: fboff = (tp->fbomsb << 8) | tp->fbolsb;
83: gi->gd_fbaddr = (caddr_t) (*((u_char *)addr + fboff) << 16);
84: if (gi->gd_regaddr >= (caddr_t)DIOIIBASE) {
85: /*
86: * For DIO II space the fbaddr just computed is the offset
87: * from the select code base (regaddr) of the framebuffer.
88: * Hence it is also implicitly the size of the register set.
89: */
90: gi->gd_regsize = (int) gi->gd_fbaddr;
91: gi->gd_fbaddr += (int) gi->gd_regaddr;
92: gp->g_regkva = addr;
93: gp->g_fbkva = addr + gi->gd_regsize;
94: } else {
95: /*
96: * For DIO space we need to map the seperate framebuffer.
97: */
98: gp->g_regkva = addr;
99: gp->g_fbkva = iomap(gi->gd_fbaddr, gi->gd_fbsize);
100: }
101: gi->gd_dwidth = (tp->dwmsb << 8) | tp->dwlsb;
102: gi->gd_dheight = (tp->dhmsb << 8) | tp->dhlsb;
103: gi->gd_planes = tp->num_planes;
104: gi->gd_colors = 1 << gi->gd_planes;
105: if (gi->gd_colors == 1) {
106: fbp = (u_char *) gp->g_fbkva;
107: tp->wen = ~0;
108: tp->prr = 0x3;
109: tp->fben = ~0;
110: save = *fbp;
111: *fbp = 0xFF;
112: gi->gd_colors = *fbp + 1;
113: *fbp = save;
114: }
115: return(1);
116: }
117:
118: /*
119: * Change the mode of the display.
120: * Right now all we can do is grfon/grfoff.
121: * Return a UNIX error number or 0 for success.
122: * Function may not be needed anymore.
123: */
124: /*ARGSUSED*/
125: tc_mode(gp, cmd)
126: struct grf_softc *gp;
127: {
128: int error = 0;
129:
130: switch (cmd) {
131: case GM_GRFON:
132: case GM_GRFOFF:
133: break;
134: default:
135: error = EINVAL;
136: break;
137: }
138: return(error);
139: }
140: #endif
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