Commit | Line | Data |
---|---|---|
60f56dfc KM |
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 | * %sccs.include.redist.c% | |
11 | * | |
16a027eb | 12 | * from: Utah $Hdr: grf_tc.c 1.18 91/04/02$ |
60f56dfc | 13 | * |
16a027eb | 14 | * @(#)grf_tc.c 7.4 (Berkeley) %G% |
60f56dfc KM |
15 | */ |
16 | ||
17 | #include "grf.h" | |
18 | #if NGRF > 0 | |
19 | ||
20 | /* | |
21 | * Graphics routines for TOPCAT frame buffer | |
22 | */ | |
b28b3a13 KB |
23 | #include "sys/param.h" |
24 | #include "sys/errno.h" | |
60f56dfc KM |
25 | |
26 | #include "grfioctl.h" | |
27 | #include "grfvar.h" | |
28 | #include "grf_tcreg.h" | |
29 | ||
b28b3a13 | 30 | #include "../include/cpu.h" |
60f56dfc KM |
31 | |
32 | /* | |
33 | * Initialize hardware. | |
34 | * Must fill in the grfinfo structure in g_softc. | |
35 | * Returns 0 if hardware not present, non-zero ow. | |
36 | */ | |
37 | tc_init(gp, addr) | |
38 | struct grf_softc *gp; | |
16a027eb | 39 | caddr_t addr; |
60f56dfc KM |
40 | { |
41 | register struct tcboxfb *tp = (struct tcboxfb *) addr; | |
42 | struct grfinfo *gi = &gp->g_display; | |
43 | volatile u_char *fbp; | |
44 | u_char save; | |
45 | int fboff; | |
16a027eb | 46 | extern caddr_t sctopa(), iomap(); |
60f56dfc | 47 | |
16a027eb MH |
48 | if (ISIIOVA(addr)) |
49 | gi->gd_regaddr = (caddr_t) IIOP(addr); | |
50 | else | |
51 | gi->gd_regaddr = sctopa(vatosc(addr)); | |
60f56dfc KM |
52 | gi->gd_regsize = 0x10000; |
53 | gi->gd_fbwidth = (tp->fbwmsb << 8) | tp->fbwlsb; | |
54 | gi->gd_fbheight = (tp->fbhmsb << 8) | tp->fbhlsb; | |
60f56dfc | 55 | gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight; |
16a027eb MH |
56 | fboff = (tp->fbomsb << 8) | tp->fbolsb; |
57 | gi->gd_fbaddr = (caddr_t) (*((u_char *)addr + fboff) << 16); | |
58 | if (gi->gd_regaddr >= (caddr_t)DIOIIBASE) { | |
59 | /* | |
60 | * For DIO II space the fbaddr just computed is the offset | |
61 | * from the select code base (regaddr) of the framebuffer. | |
62 | * Hence it is also implicitly the size of the register set. | |
63 | */ | |
64 | gi->gd_regsize = (int) gi->gd_fbaddr; | |
65 | gi->gd_fbaddr += (int) gi->gd_regaddr; | |
66 | gp->g_regkva = addr; | |
67 | gp->g_fbkva = addr + gi->gd_regsize; | |
68 | } else { | |
69 | /* | |
70 | * For DIO space we need to map the seperate framebuffer. | |
71 | */ | |
72 | gp->g_regkva = addr; | |
73 | gp->g_fbkva = iomap(gi->gd_fbaddr, gi->gd_fbsize); | |
74 | } | |
60f56dfc KM |
75 | gi->gd_dwidth = (tp->dwmsb << 8) | tp->dwlsb; |
76 | gi->gd_dheight = (tp->dhmsb << 8) | tp->dhlsb; | |
77 | gi->gd_planes = tp->num_planes; | |
78 | gi->gd_colors = 1 << gi->gd_planes; | |
79 | if (gi->gd_colors == 1) { | |
16a027eb | 80 | fbp = (u_char *) gp->g_fbkva; |
60f56dfc KM |
81 | tp->wen = ~0; |
82 | tp->prr = 0x3; | |
83 | tp->fben = ~0; | |
84 | save = *fbp; | |
85 | *fbp = 0xFF; | |
86 | gi->gd_colors = *fbp + 1; | |
87 | *fbp = save; | |
88 | } | |
89 | return(1); | |
90 | } | |
91 | ||
92 | /* | |
93 | * Change the mode of the display. | |
94 | * Right now all we can do is grfon/grfoff. | |
95 | * Return a UNIX error number or 0 for success. | |
96 | * Function may not be needed anymore. | |
97 | */ | |
98 | /*ARGSUSED*/ | |
99 | tc_mode(gp, cmd) | |
100 | struct grf_softc *gp; | |
101 | { | |
102 | int error = 0; | |
103 | ||
104 | switch (cmd) { | |
105 | case GM_GRFON: | |
106 | case GM_GRFOFF: | |
107 | break; | |
108 | default: | |
109 | error = EINVAL; | |
110 | break; | |
111 | } | |
112 | return(error); | |
113 | } | |
114 | #endif |