1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
|
/*
* Mach Operating System
* Copyright (c) 1992 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* File: sfb_hdw.c
* Author: Alessandro Forin, Carnegie Mellon University
* Date: 11/92
*
* Driver for the Smart Color Frame Buffer Display,
* hardware-level operations.
*/
#include <sfb.h>
#if (NSFB > 0)
#include <platforms.h>
#include <machine/machspl.h>
#include <mach/std_types.h>
#include <chips/busses.h>
#include <chips/screen_defs.h>
#include <chips/pm_defs.h>
#include <machine/machspl.h>
typedef pm_softc_t sfb_softc_t;
#ifdef DECSTATION
#include <mips/PMAX/pmagb_ba.h>
#include <mips/PMAX/tc.h>
#endif
#ifdef FLAMINGO
#include <mips/PMAX/pmagb_ba.h> /* XXXX fixme */
#include <alpha/DEC/tc.h>
#define sparsify(x) ((1L << 28) | (((x) & 0x7ffffff) << 1) | \
((x) & ~0x7ffffffL))
#endif
#ifndef sparsify
#define sparsify(x) x
#endif
/*
* Definition of the driver for the auto-configuration program.
*/
int sfb_probe(), sfb_intr();
void sfb_attach();
vm_offset_t sfb_std[NSFB] = { 0 };
struct bus_device *sfb_info[NSFB];
struct bus_driver sfb_driver =
{ sfb_probe, 0, sfb_attach, 0, sfb_std, "sfb", sfb_info,
0, 0, BUS_INTR_DISABLED};
/*
* Probe/Attach functions
*/
sfb_probe(
vm_offset_t addr,
struct bus_device *device)
{
static probed_once = 0;
/*
* Probing was really done sweeping the TC long ago
*/
if (tc_probe("sfb") == 0)
return 0;
if (probed_once++ > 1) {
printf("[mappable] ");
device->address = addr;
}
return 1;
}
void sfb_attach(
struct bus_device *ui)
{
/* ... */
printf(": smart frame buffer");
}
/*
* Interrupt routine
*/
sfb_intr(
int unit,
spl_t spllevel)
{
register volatile char *ack;
/* acknowledge interrupt */
ack = (volatile char *) sfb_info[unit]->address + SFB_OFFSET_ICLR;
*ack = 0;
#if mips
splx(spllevel);
#endif
lk201_led(unit);
}
sfb_vretrace(
sfb_softc_t *sfb,
boolean_t on)
{
sfb_regs *regs;
regs = (sfb_regs *) ((char *)sfb->framebuffer - SFB_OFFSET_VRAM + SFB_OFFSET_REGS);
regs->intr_enable = (on) ? 1 : 0;
}
/*
* Boot time initialization: must make device
* usable as console asap.
*/
#define sfb_set_status cfb_set_status
extern int
sfb_soft_reset(), sfb_set_status(),
sfb_pos_cursor(), bt459_video_on(),
bt459_video_off(), sfb_vretrace(),
pm_get_status(), pm_char_paint(),
pm_insert_line(), pm_remove_line(),
pm_clear_bitmap(), pm_map_page();
static struct screen_switch sfb_sw = {
screen_noop, /* graphic_open */
sfb_soft_reset, /* graphic_close */
sfb_set_status, /* set_status */
pm_get_status, /* get_status */
pm_char_paint, /* char_paint */
sfb_pos_cursor, /* pos_cursor */
pm_insert_line, /* insert_line */
pm_remove_line, /* remove_line */
pm_clear_bitmap, /* clear_bitmap */
bt459_video_on, /* video_on */
bt459_video_off, /* video_off */
sfb_vretrace, /* intr_enable */
pm_map_page /* map_page */
};
sfb_cold_init(
int unit,
user_info_t *up)
{
sfb_softc_t *sfb;
screen_softc_t sc = screen(unit);
vm_offset_t base = tc_probe("sfb");
int hor_p, ver_p;
boolean_t makes_sense;
bcopy(&sfb_sw, &sc->sw, sizeof(sc->sw));
sc->flags |= COLOR_SCREEN;
/*
* I am confused here by the documentation. One document
* sez there are three boards:
* "PMAGB-BA" can do 1280x1024 @66Hz or @72Hz
* "PMAGB-BC" can do 1024x864 @60Hz or 1280x1024 @72Hz
* "PMAGB-BE" can do 1024x768 @72Hz or 1280x1024 @72Hz
* Another document sez things differently:
* "PMAGB-BB" can do 1024x768 @72Hz
* "PMAGB-BD" can do 1024x864 @60Hz or 1280x1024 @72Hz
*
* I would be inclined to believe the first one, which came
* with an actual piece of hardware attached (a PMAGB-BA).
* But I could swear I got a first board (which blew up
* instantly) and it was calling itself PMAGB-BB...
*
* Since I have not seen any other hardware I will make
* this code as hypothetical as I can. Should work :-))
*/
makes_sense = FALSE;
{
sfb_regs *regs;
regs = (sfb_regs *) ((char *)base + SFB_OFFSET_REGS);
hor_p = (regs->vhor_setup & 0x1ff) * 4;
ver_p = regs->vvert_setup & 0x7ff;
if (((hor_p == 1280) && (ver_p == 1024)) ||
((hor_p == 1024) && (ver_p == 864)) ||
((hor_p == 1024) && (ver_p == 768)))
makes_sense = TRUE;
}
if (makes_sense) {
sc->frame_scanline_width = hor_p;
sc->frame_height = ver_p;
sc->frame_visible_width = hor_p;
sc->frame_visible_height = ver_p;
} else {
sc->frame_scanline_width = 1280;
sc->frame_height = 1024;
sc->frame_visible_width = 1280;
sc->frame_visible_height = 1024;
}
pm_init_screen_params(sc,up);
(void) screen_up(unit, up);
sfb = pm_alloc( unit, sparsify(base + SFB_OFFSET_BT459),
base + SFB_OFFSET_VRAM, -1);
screen_default_colors(up);
sfb_soft_reset(sc);
/*
* Clearing the screen at boot saves from scrolling
* much, and speeds up booting quite a bit.
*/
screen_blitc( unit, 'C'-'@');/* clear screen */
}
#if 0 /* this is how you find out about a new screen */
fill(addr,n,c)
char *addr;
{
while (n-- > 0) *addr++ = c;
}
#endif
#endif (NSFB > 0)
|
