1 /*
2 * Copyright 1992 by Rich Murphey <Rich@Rice.edu>
3 * Copyright 1993 by David Wexelblat <dwex@goblin.org>
4 *
5 * Permission to use, copy, modify, distribute, and sell this software and its
6 * documentation for any purpose is hereby granted without fee, provided that
7 * the above copyright notice appear in all copies and that both that
8 * copyright notice and this permission notice appear in supporting
9 * documentation, and that the names of Rich Murphey and David Wexelblat
10 * not be used in advertising or publicity pertaining to distribution of
11 * the software without specific, written prior permission. Rich Murphey and
12 * David Wexelblat make no representations about the suitability of this
13 * software for any purpose. It is provided "as is" without express or
14 * implied warranty.
15 *
16 * RICH MURPHEY AND DAVID WEXELBLAT DISCLAIM ALL WARRANTIES WITH REGARD TO
17 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
18 * FITNESS, IN NO EVENT SHALL RICH MURPHEY OR DAVID WEXELBLAT BE LIABLE FOR
19 * ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
20 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
21 * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
22 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 *
24 */
25
26 /*
27 * The ARM32 code here carries the following copyright:
28 *
29 * Copyright 1997
30 * Digital Equipment Corporation. All rights reserved.
31 * This software is furnished under license and may be used and copied only in
32 * accordance with the following terms and conditions. Subject to these
33 * conditions, you may download, copy, install, use, modify and distribute
34 * this software in source and/or binary form. No title or ownership is
35 * transferred hereby.
36 *
37 * 1) Any source code used, modified or distributed must reproduce and retain
38 * this copyright notice and list of conditions as they appear in the
39 * source file.
40 *
41 * 2) No right is granted to use any trade name, trademark, or logo of Digital
42 * Equipment Corporation. Neither the "Digital Equipment Corporation"
43 * name nor any trademark or logo of Digital Equipment Corporation may be
44 * used to endorse or promote products derived from this software without
45 * the prior written permission of Digital Equipment Corporation.
46 *
47 * 3) This software is provided "AS-IS" and any express or implied warranties,
48 * including but not limited to, any implied warranties of merchantability,
49 * fitness for a particular purpose, or non-infringement are disclaimed.
50 * In no event shall DIGITAL be liable for any damages whatsoever, and in
51 * particular, DIGITAL shall not be liable for special, indirect,
52 * consequential, or incidental damages or damages for lost profits, loss
53 * of revenue or loss of use, whether such damages arise in contract,
54 * negligence, tort, under statute, in equity, at law or otherwise, even
55 * if advised of the possibility of such damage.
56 *
57 */
58
59 #ifdef HAVE_XORG_CONFIG_H
60 #include <xorg-config.h>
61 #endif
62
63 #include <X11/X.h>
64 #include "xf86.h"
65 #include "xf86Priv.h"
66 #include "xf86_OSlib.h"
67 #include "xf86OSpriv.h"
68
69 #if defined(__NetBSD__) && !defined(MAP_FILE)
70 #define MAP_FLAGS MAP_SHARED
71 #else
72 #define MAP_FLAGS (MAP_FILE | MAP_SHARED)
73 #endif
74
75 #define BUS_BASE 0L
76 #define BUS_BASE_BWX 0L
77
78 /***************************************************************************/
79 /* Video Memory Mapping section */
80 /***************************************************************************/
81
82 static int devMemFd = -1;
83
84 /*
85 * Check if /dev/mem can be mmap'd. If it can't print a warning when
86 * "warn" is TRUE.
87 */
88 static void
checkDevMem(Bool warn)89 checkDevMem(Bool warn)
90 {
91 static Bool devMemChecked = FALSE;
92 int fd;
93 void *base;
94
95 if (devMemChecked)
96 return;
97 devMemChecked = TRUE;
98
99 if ((fd = open(DEV_MEM, O_RDWR)) >= 0) {
100 /* Try to map a page at the VGA address */
101 base = mmap((caddr_t) 0, 4096, PROT_READ | PROT_WRITE,
102 MAP_FLAGS, fd, (off_t) 0xA0000 + BUS_BASE);
103
104 if (base != MAP_FAILED) {
105 munmap((caddr_t) base, 4096);
106 devMemFd = fd;
107 return;
108 }
109 else {
110 /* This should not happen */
111 if (warn) {
112 xf86Msg(X_WARNING, "checkDevMem: failed to mmap %s (%s)\n",
113 DEV_MEM, strerror(errno));
114 }
115 return;
116 }
117 }
118 if (warn) {
119 xf86Msg(X_WARNING, "checkDevMem: failed to open %s (%s)\n",
120 DEV_MEM, strerror(errno));
121 }
122 return;
123 }
124
125 void
xf86OSInitVidMem(VidMemInfoPtr pVidMem)126 xf86OSInitVidMem(VidMemInfoPtr pVidMem)
127 {
128 checkDevMem(TRUE);
129
130 pVidMem->initialised = TRUE;
131 }
132
133 #ifdef USE_DEV_IO
134 static int IoFd = -1;
135
136 Bool
xf86EnableIO()137 xf86EnableIO()
138 {
139 if (IoFd >= 0)
140 return TRUE;
141
142 if ((IoFd = open("/dev/io", O_RDWR)) == -1) {
143 xf86Msg(X_WARNING, "xf86EnableIO: "
144 "Failed to open /dev/io for extended I/O\n");
145 return FALSE;
146 }
147 return TRUE;
148 }
149
150 void
xf86DisableIO()151 xf86DisableIO()
152 {
153 if (IoFd < 0)
154 return;
155
156 close(IoFd);
157 IoFd = -1;
158 return;
159 }
160
161 #endif
162
163 #if defined(USE_ARC_MMAP) || defined(__arm32__)
164
165 Bool
xf86EnableIO()166 xf86EnableIO()
167 {
168 int fd;
169 void *base;
170
171 if (ExtendedEnabled)
172 return TRUE;
173
174 if ((fd = open("/dev/ttyC0", O_RDWR)) >= 0) {
175 /* Try to map a page at the pccons I/O space */
176 base = (void *) mmap((caddr_t) 0, 65536, PROT_READ | PROT_WRITE,
177 MAP_FLAGS, fd, (off_t) 0x0000);
178
179 if (base != (void *) -1) {
180 IOPortBase = base;
181 }
182 else {
183 xf86Msg(X_WARNING, "EnableIO: failed to mmap %s (%s)\n",
184 "/dev/ttyC0", strerror(errno));
185 return FALSE;
186 }
187 }
188 else {
189 xf86Msg("EnableIO: failed to open %s (%s)\n",
190 "/dev/ttyC0", strerror(errno));
191 return FALSE;
192 }
193
194 ExtendedEnabled = TRUE;
195
196 return TRUE;
197 }
198
199 void
xf86DisableIO()200 xf86DisableIO()
201 {
202 return;
203 }
204
205 #endif /* USE_ARC_MMAP */
206