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
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
|
/* $Id: sunfb.c,v 1.28 1997/08/22 15:55:23 jj Exp $
* sunfb.c: Sun generic frame buffer support.
*
* Copyright (C) 1995, 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
*
* Added getcmap ioctl, may, 96
* Support for multiple fbs, sep, 96
*/
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/kd.h>
#include <linux/malloc.h>
#include <linux/major.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/bitops.h>
#include <asm/oplib.h>
#include <asm/sbus.h>
#include <asm/fbio.h>
#include <asm/io.h>
#include <linux/kbd_kern.h>
#include <linux/vt_kern.h>
#include <linux/consolemap.h>
#include <linux/selection.h>
#include <linux/console_struct.h>
#include "fb.h"
extern void set_other_palette (int);
extern void set_cursor (int);
#define FB_SETUP(err) \
int minor = FB_DEV (inode->i_rdev); \
\
if (minor >= fbinfos || \
fbinfo [minor].type.fb_type == FBTYPE_NOTYPE) \
return -(err);
static int
fb_open (struct inode * inode, struct file * file)
{
FB_SETUP(EBADF)
if (fbinfo [minor].open)
return -EBUSY;
fbinfo [minor].mmaped = 0;
fbinfo [minor].open = 1;
return 0;
}
static int
fb_ioctl (struct inode *inode, struct file *file, uint cmd, unsigned long arg)
{
fbinfo_t *fb;
struct fbcmap *cmap;
int i;
FB_SETUP(EBADF)
fb = &fbinfo [minor];
switch (cmd){
case FBIOGTYPE: /* return frame buffer type */
copy_to_user_ret((struct fbtype *)arg, &fb->type, sizeof(struct fbtype), -EFAULT);
break;
case FBIOGATTR:{
struct fbgattr *fba = (struct fbgattr *) arg;
i = verify_area (VERIFY_WRITE, (void *) arg, sizeof (struct fbgattr));
if (i) return i;
__put_user_ret(fb->real_type, &fba->real_type, -EFAULT);
__put_user_ret(0, &fba->owner, -EFAULT);
__copy_to_user_ret(&fba->fbtype, &fb->type,
sizeof(struct fbtype), -EFAULT);
__put_user_ret(0, &fba->sattr.flags, -EFAULT);
__put_user_ret(fb->type.fb_type, &fba->sattr.emu_type, -EFAULT);
__put_user_ret(-1, &fba->sattr.dev_specific[0], -EFAULT);
__put_user_ret(fb->type.fb_type, &fba->emu_types[0], -EFAULT);
for (i = 1; i < 4; i++)
put_user_ret(fb->emulations[i], &fba->emu_types[i], -EFAULT);
break;
}
case FBIOSATTR:
i = verify_area (VERIFY_READ, (void *) arg, sizeof (struct fbsattr));
if (i) return i;
return -EINVAL;
case FBIOSVIDEO:
if (fb == fbinfo && vt_cons[fg_console]->vc_mode == KD_TEXT)
break;
get_user_ret(i, (int *)arg, -EFAULT);
if (i){
if (!fb->blanked || !fb->unblank)
break;
if (!minor || (fb->open && fb->mmaped))
(*fb->unblank)(fb);
fb->blanked = 0;
} else {
if (fb->blanked || !fb->blank)
break;
(*fb->blank)(fb);
fb->blanked = 1;
}
break;
case FBIOGVIDEO:
put_user_ret(fb->blanked, (int *) arg, -EFAULT);
break;
case FBIOGETCMAP: {
char *rp, *gp, *bp;
int end, count, index;
if (!fb->loadcmap)
return -EINVAL;
i = verify_area (VERIFY_READ, (void *) arg, sizeof (struct fbcmap));
if (i) return i;
cmap = (struct fbcmap *) arg;
__get_user_ret(count, &cmap->count, -EFAULT);
__get_user_ret(index, &cmap->index, -EFAULT);
if ((index < 0) || (index > 255))
return -EINVAL;
if (index + count > 256)
count = 256 - index;
__get_user_ret(rp, &cmap->red, -EFAULT);
__get_user_ret(gp, &cmap->green, -EFAULT);
__get_user_ret(bp, &cmap->blue, -EFAULT);
if(verify_area (VERIFY_WRITE, rp, count)) return -EFAULT;
if(verify_area (VERIFY_WRITE, gp, count)) return -EFAULT;
if(verify_area (VERIFY_WRITE, bp, count)) return -EFAULT;
end = index + count;
for (i = index; i < end; i++){
__put_user_ret(fb->color_map CM(i,0), rp, -EFAULT);
__put_user_ret(fb->color_map CM(i,1), gp, -EFAULT);
__put_user_ret(fb->color_map CM(i,2), bp, -EFAULT);
rp++; gp++; bp++;
}
(*fb->loadcmap)(fb, index, count);
break;
}
case FBIOPUTCMAP: { /* load color map entries */
char *rp, *gp, *bp;
int end, count, index;
if (!fb->loadcmap)
return -EINVAL;
i = verify_area (VERIFY_READ, (void *) arg, sizeof (struct fbcmap));
if (i) return i;
cmap = (struct fbcmap *) arg;
__get_user_ret(count, &cmap->count, -EFAULT);
__get_user_ret(index, &cmap->index, -EFAULT);
if ((index < 0) || (index > 255))
return -EINVAL;
if (index + count > 256)
count = 256 - index;
__get_user_ret(rp, &cmap->red, -EFAULT);
__get_user_ret(gp, &cmap->green, -EFAULT);
__get_user_ret(bp, &cmap->blue, -EFAULT);
if(verify_area (VERIFY_READ, rp, count)) return -EFAULT;
if(verify_area (VERIFY_READ, gp, count)) return -EFAULT;
if(verify_area (VERIFY_READ, bp, count)) return -EFAULT;
end = index + count;
for (i = index; i < end; i++){
__get_user_ret(fb->color_map CM(i,0), rp, -EFAULT);
__get_user_ret(fb->color_map CM(i,1), gp, -EFAULT);
__get_user_ret(fb->color_map CM(i,2), bp, -EFAULT);
rp++; gp++; bp++;
}
(*fb->loadcmap)(fb, index, count);
break;
}
case FBIOGCURMAX: {
struct fbcurpos *p = (struct fbcurpos *) arg;
if (!fb->setcursor) return -EINVAL;
if(verify_area (VERIFY_WRITE, p, sizeof (struct fbcurpos)))
return -EFAULT;
__put_user_ret(fb->cursor.hwsize.fbx, &p->fbx, -EFAULT);
__put_user_ret(fb->cursor.hwsize.fby, &p->fby, -EFAULT);
break;
}
case FBIOSCURSOR:
if (!fb->setcursor) return -EINVAL;
if (fb == fbinfo) {
if (vt_cons[fg_console]->vc_mode == KD_TEXT)
return -EINVAL; /* Don't let graphics programs hide our nice text cursor */
sbus_hw_cursor_shown = 0; /* Forget state of our text cursor */
}
return sbus_hw_scursor ((struct fbcursor *) arg, fb);
case FBIOSCURPOS:
if (!fb->setcursor) return -EINVAL;
/* Don't let graphics programs move our nice text cursor */
if (fb == fbinfo) {
if (vt_cons[fg_console]->vc_mode == KD_TEXT)
return -EINVAL; /* Don't let graphics programs move our nice text cursor */
}
i= verify_area (VERIFY_READ, (void *) arg, sizeof (struct fbcurpos));
if (i) return i;
fb->cursor.cpos = *(struct fbcurpos *)arg;
(*fb->setcursor) (fb);
break;
default:
if (fb->ioctl){
i = fb->ioctl (inode, file, cmd, arg, fb);
if (i == -ENOSYS) {
printk ("[[FBIO: %8.8x]]\n", cmd);
return -EINVAL;
}
return i;
}
printk ("[[FBIO: %8.8x]]\n", cmd);
return -EINVAL;
}
return 0;
}
static int
fb_close (struct inode * inode, struct file *filp)
{
fbinfo_t *fb;
struct fbcursor cursor;
FB_SETUP(EBADF)
fb = &fbinfo[minor];
if (!minor)
vt_cons [fb->vtconsole]->vc_mode = KD_TEXT;
/* Leaving graphics mode, turn off the cursor */
if (fb->mmaped) {
fb->clear_fb (minor);
if (!minor && suncons_ops.clear_margin)
suncons_ops.clear_margin();
}
cursor.set = FB_CUR_SETCUR;
cursor.enable = 0;
/* Reset the driver */
if (fb->reset)
fb->reset(fb);
if (fb->open)
fb->open = 0;
fb_ioctl (inode, filp, FBIOSCURPOS, (unsigned long) &cursor);
set_other_palette (minor);
if (!minor) {
render_screen ();
set_cursor (fg_console);
} else if (fb->blank)
(*fb->blank)(fb);
return 0;
}
static int
fb_mmap (struct inode *inode, struct file *file, struct vm_area_struct *vma)
{
fbinfo_t *fb;
FB_SETUP(ENXIO)
fb = &fbinfo [minor];
if (fb->mmap){
int v;
v = (*fb->mmap)(inode, file, vma, fb->base, fb);
if (v)
return v;
vma->vm_flags |= VM_IO;
if (!fb->mmaped) {
fb->mmaped = 1;
if (!minor) {
fb->vtconsole = fg_console;
vt_cons [fg_console]->vc_mode = KD_GRAPHICS;
} else {
if (fb->unblank && !fb->blanked)
(*fb->unblank)(fb);
}
}
return 0;
} else
return -ENXIO;
}
static struct file_operations graphdev_fops =
{
NULL, /* lseek */
NULL, /* read */
NULL, /* write */
NULL, /* readdir */
NULL, /* poll */
fb_ioctl,
fb_mmap,
fb_open, /* open */
fb_close, /* close */
};
__initfunc(int fb_init (void))
{
/* Register the frame buffer device */
if (register_chrdev (GRAPHDEV_MAJOR, "graphics", &graphdev_fops)){
printk ("Could not register graphics device\n");
return -EIO;
}
return 0; /* success */
}
|
