fb.c revision 1.11 1 1.11 agc /* $NetBSD: fb.c,v 1.11 2003/08/07 16:29:55 agc Exp $ */
2 1.1 gwr
3 1.1 gwr /*
4 1.1 gwr * Copyright (c) 1992, 1993
5 1.1 gwr * The Regents of the University of California. All rights reserved.
6 1.1 gwr *
7 1.1 gwr * This software was developed by the Computer Systems Engineering group
8 1.1 gwr * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 1.1 gwr * contributed to Berkeley.
10 1.1 gwr *
11 1.1 gwr * All advertising materials mentioning features or use of this software
12 1.1 gwr * must display the following acknowledgement:
13 1.1 gwr * This product includes software developed by the University of
14 1.1 gwr * California, Lawrence Berkeley Laboratory.
15 1.1 gwr *
16 1.1 gwr * Redistribution and use in source and binary forms, with or without
17 1.1 gwr * modification, are permitted provided that the following conditions
18 1.1 gwr * are met:
19 1.1 gwr * 1. Redistributions of source code must retain the above copyright
20 1.1 gwr * notice, this list of conditions and the following disclaimer.
21 1.1 gwr * 2. Redistributions in binary form must reproduce the above copyright
22 1.1 gwr * notice, this list of conditions and the following disclaimer in the
23 1.1 gwr * documentation and/or other materials provided with the distribution.
24 1.11 agc * 3. Neither the name of the University nor the names of its contributors
25 1.1 gwr * may be used to endorse or promote products derived from this software
26 1.1 gwr * without specific prior written permission.
27 1.1 gwr *
28 1.1 gwr * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 1.1 gwr * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 1.1 gwr * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 1.1 gwr * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 1.1 gwr * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 1.1 gwr * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 1.1 gwr * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 1.1 gwr * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 1.1 gwr * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 1.1 gwr * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 1.1 gwr * SUCH DAMAGE.
39 1.1 gwr *
40 1.1 gwr * @(#)fb.c 8.1 (Berkeley) 6/11/93
41 1.1 gwr */
42 1.1 gwr
43 1.1 gwr /*
44 1.1 gwr * /dev/fb (indirect frame buffer driver).
45 1.1 gwr */
46 1.10 lukem
47 1.10 lukem #include <sys/cdefs.h>
48 1.11 agc __KERNEL_RCSID(0, "$NetBSD: fb.c,v 1.11 2003/08/07 16:29:55 agc Exp $");
49 1.1 gwr
50 1.1 gwr #include <sys/param.h>
51 1.4 gwr #include <sys/systm.h>
52 1.1 gwr #include <sys/conf.h>
53 1.1 gwr #include <sys/device.h>
54 1.1 gwr #include <sys/ioctl.h>
55 1.1 gwr #include <sys/proc.h>
56 1.1 gwr
57 1.5 gwr #include <machine/eeprom.h>
58 1.7 thorpej #include <dev/sun/fbio.h>
59 1.1 gwr
60 1.5 gwr #include <sun3/dev/fbvar.h>
61 1.5 gwr #include <sun3/dev/p4reg.h>
62 1.1 gwr
63 1.8 gehenna dev_type_open(fbopen);
64 1.8 gehenna dev_type_close(fbclose);
65 1.8 gehenna dev_type_ioctl(fbioctl);
66 1.8 gehenna dev_type_mmap(fbmmap);
67 1.8 gehenna
68 1.8 gehenna const struct cdevsw fb_cdevsw = {
69 1.8 gehenna fbopen, fbclose, noread, nowrite, fbioctl,
70 1.9 jdolecek nostop, notty, nopoll, fbmmap, nokqfilter,
71 1.8 gehenna };
72 1.4 gwr
73 1.1 gwr static struct fbdevice *devfb;
74 1.2 gwr static int fbpriority;
75 1.1 gwr
76 1.1 gwr /*
77 1.1 gwr * This is called by the real driver (i.e. bw2, cg3, ...)
78 1.2 gwr * to declare itself as a potential default frame buffer.
79 1.1 gwr */
80 1.1 gwr void
81 1.2 gwr fb_attach(fb, newpri)
82 1.1 gwr struct fbdevice *fb;
83 1.2 gwr int newpri;
84 1.1 gwr {
85 1.2 gwr if (fbpriority < newpri) {
86 1.2 gwr fbpriority = newpri;
87 1.2 gwr devfb = fb;
88 1.2 gwr }
89 1.1 gwr }
90 1.1 gwr
91 1.1 gwr int
92 1.1 gwr fbopen(dev, flags, mode, p)
93 1.1 gwr dev_t dev;
94 1.1 gwr int flags, mode;
95 1.1 gwr struct proc *p;
96 1.1 gwr {
97 1.1 gwr
98 1.1 gwr if (devfb == NULL)
99 1.1 gwr return (ENXIO);
100 1.1 gwr return ((*devfb->fb_driver->fbd_open)(dev, flags, mode, p));
101 1.1 gwr }
102 1.1 gwr
103 1.1 gwr int
104 1.1 gwr fbclose(dev, flags, mode, p)
105 1.1 gwr dev_t dev;
106 1.1 gwr int flags, mode;
107 1.1 gwr struct proc *p;
108 1.1 gwr {
109 1.1 gwr
110 1.1 gwr return ((*devfb->fb_driver->fbd_close)(dev, flags, mode, p));
111 1.1 gwr }
112 1.1 gwr
113 1.1 gwr int
114 1.1 gwr fbioctl(dev, cmd, data, flags, p)
115 1.1 gwr dev_t dev;
116 1.1 gwr u_long cmd;
117 1.1 gwr caddr_t data;
118 1.1 gwr int flags;
119 1.1 gwr struct proc *p;
120 1.1 gwr {
121 1.1 gwr return (fbioctlfb(devfb, cmd, data));
122 1.1 gwr }
123 1.1 gwr
124 1.6 simonb paddr_t
125 1.3 mycroft fbmmap(dev, off, prot)
126 1.1 gwr dev_t dev;
127 1.6 simonb off_t off;
128 1.6 simonb int prot;
129 1.1 gwr {
130 1.1 gwr return ((*devfb->fb_driver->fbd_mmap)(dev, off, prot));
131 1.1 gwr }
132 1.1 gwr
133 1.1 gwr /*
134 1.1 gwr * Common fb ioctl function
135 1.1 gwr */
136 1.1 gwr int
137 1.1 gwr fbioctlfb(fb, cmd, data)
138 1.1 gwr struct fbdevice *fb;
139 1.1 gwr u_long cmd;
140 1.1 gwr caddr_t data;
141 1.1 gwr {
142 1.1 gwr struct fbdriver *fbd = fb->fb_driver;
143 1.4 gwr void *vp = (void *)data;
144 1.1 gwr int error;
145 1.1 gwr
146 1.1 gwr switch (cmd) {
147 1.1 gwr
148 1.1 gwr case FBIOGTYPE:
149 1.4 gwr *(struct fbtype *)vp = fb->fb_fbtype;
150 1.1 gwr error = 0;
151 1.1 gwr break;
152 1.1 gwr
153 1.1 gwr case FBIOGATTR:
154 1.4 gwr error = (*fbd->fbd_gattr)(fb, vp);
155 1.1 gwr break;
156 1.1 gwr
157 1.1 gwr case FBIOGVIDEO:
158 1.4 gwr error = (*fbd->fbd_gvideo)(fb, vp);
159 1.1 gwr break;
160 1.1 gwr
161 1.1 gwr case FBIOSVIDEO:
162 1.4 gwr error = (*fbd->fbd_svideo)(fb, vp);
163 1.1 gwr break;
164 1.1 gwr
165 1.1 gwr case FBIOGETCMAP:
166 1.4 gwr error = (*fbd->fbd_getcmap)(fb, vp);
167 1.1 gwr break;
168 1.1 gwr
169 1.1 gwr case FBIOPUTCMAP:
170 1.4 gwr error = (*fbd->fbd_putcmap)(fb, vp);
171 1.1 gwr break;
172 1.1 gwr
173 1.1 gwr default:
174 1.1 gwr error = ENOTTY;
175 1.1 gwr }
176 1.1 gwr return (error);
177 1.1 gwr }
178 1.4 gwr
179 1.4 gwr void
180 1.4 gwr fb_unblank()
181 1.4 gwr {
182 1.4 gwr int on = 1;
183 1.4 gwr
184 1.4 gwr if (devfb == NULL)
185 1.4 gwr return;
186 1.4 gwr
187 1.4 gwr (*devfb->fb_driver->fbd_svideo)(devfb, (void *)&on);
188 1.4 gwr }
189 1.4 gwr
190 1.4 gwr /*
191 1.4 gwr * Default ioctl function to put in struct fbdriver
192 1.4 gwr * for functions that are not supported.
193 1.4 gwr */
194 1.4 gwr int
195 1.4 gwr fb_noioctl(fbd, vp)
196 1.4 gwr struct fbdevice *fbd;
197 1.4 gwr void *vp;
198 1.4 gwr {
199 1.4 gwr return ENOTTY;
200 1.4 gwr }
201 1.4 gwr
202 1.5 gwr /****************************************************************
203 1.5 gwr * Misc. helpers...
204 1.5 gwr */
205 1.5 gwr
206 1.5 gwr /* Set FB size based on EEPROM screen shape code. */
207 1.5 gwr void
208 1.5 gwr fb_eeprom_setsize(fb)
209 1.5 gwr struct fbdevice *fb;
210 1.5 gwr {
211 1.5 gwr int szcode;
212 1.5 gwr int w, h;
213 1.5 gwr
214 1.5 gwr /* Go get the EEPROM screen size byte. */
215 1.5 gwr szcode = eeprom_copy->eeScreenSize;
216 1.5 gwr
217 1.5 gwr w = h = 0;
218 1.5 gwr switch (szcode) {
219 1.5 gwr case EE_SCR_1152X900:
220 1.5 gwr w = 1152;
221 1.5 gwr h = 900;
222 1.5 gwr break;
223 1.5 gwr case EE_SCR_1024X1024:
224 1.5 gwr w = 1024;
225 1.5 gwr h = 1024;
226 1.5 gwr break;
227 1.5 gwr case EE_SCR_1600X1280:
228 1.5 gwr w = 1600;
229 1.5 gwr h = 1280;
230 1.5 gwr break;
231 1.5 gwr case EE_SCR_1440X1440:
232 1.5 gwr w = 1440;
233 1.5 gwr h = 1440;
234 1.5 gwr break;
235 1.5 gwr default:
236 1.5 gwr break;
237 1.5 gwr }
238 1.5 gwr
239 1.5 gwr if (w && h) {
240 1.5 gwr fb->fb_fbtype.fb_width = w;
241 1.5 gwr fb->fb_fbtype.fb_height = h;
242 1.5 gwr } else {
243 1.5 gwr printf("%s: EE size code %d unknown\n",
244 1.5 gwr fb->fb_name, szcode);
245 1.5 gwr }
246 1.5 gwr }
247 1.5 gwr
248 1.5 gwr /*
249 1.5 gwr * Probe for a P4 register at the passed virtual address.
250 1.5 gwr * Returns P4 ID value, or -1 if no P4 register.
251 1.5 gwr */
252 1.5 gwr int
253 1.5 gwr fb_pfour_id(va)
254 1.5 gwr void *va;
255 1.5 gwr {
256 1.5 gwr volatile u_int32_t val, save, *pfour = va;
257 1.5 gwr
258 1.5 gwr /* Read the P4 register. */
259 1.5 gwr save = *pfour;
260 1.5 gwr
261 1.5 gwr /*
262 1.5 gwr * Try to modify the type code. If it changes, put the
263 1.5 gwr * original value back, and tell the caller that the
264 1.5 gwr * framebuffer does not have a P4 register.
265 1.5 gwr */
266 1.5 gwr val = save & ~P4_REG_RESET;
267 1.5 gwr *pfour = (val ^ P4_FBTYPE_MASK);
268 1.5 gwr if ((*pfour ^ val) & P4_FBTYPE_MASK) {
269 1.5 gwr *pfour = save;
270 1.5 gwr return (-1);
271 1.5 gwr }
272 1.5 gwr
273 1.5 gwr return (P4_ID(val));
274 1.5 gwr }
275 1.5 gwr
276 1.5 gwr /*
277 1.5 gwr * Return the status of the video enable.
278 1.5 gwr */
279 1.5 gwr int
280 1.5 gwr fb_pfour_get_video(fb)
281 1.5 gwr struct fbdevice *fb;
282 1.5 gwr {
283 1.5 gwr
284 1.5 gwr return ((*fb->fb_pfour & P4_REG_VIDEO) != 0);
285 1.5 gwr }
286 1.5 gwr
287 1.5 gwr /*
288 1.5 gwr * Turn video on or off using the P4 register.
289 1.5 gwr */
290 1.5 gwr void
291 1.5 gwr fb_pfour_set_video(fb, on)
292 1.5 gwr struct fbdevice *fb;
293 1.5 gwr int on;
294 1.5 gwr {
295 1.5 gwr int pfour;
296 1.5 gwr
297 1.5 gwr pfour = *fb->fb_pfour & ~(P4_REG_INTCLR|P4_REG_VIDEO);
298 1.5 gwr *fb->fb_pfour = pfour | (on ? P4_REG_VIDEO : 0);
299 1.5 gwr }
300 1.5 gwr
301 1.5 gwr static const struct {
302 1.5 gwr int w, h;
303 1.5 gwr } fb_p4sizedecode[P4_SIZE_MASK+1] = {
304 1.5 gwr { 1600, 1280 },
305 1.5 gwr { 1152, 900 },
306 1.5 gwr { 1024, 1024 },
307 1.5 gwr { 1280, 1024 },
308 1.5 gwr { 1440, 1440 },
309 1.5 gwr { 640, 480 },
310 1.5 gwr };
311 1.5 gwr
312 1.5 gwr /*
313 1.5 gwr * Use the P4 register to determine the screen size.
314 1.5 gwr */
315 1.5 gwr void
316 1.5 gwr fb_pfour_setsize(fb)
317 1.5 gwr struct fbdevice *fb;
318 1.5 gwr {
319 1.5 gwr int p4, p4type, p4size;
320 1.5 gwr int h, w;
321 1.5 gwr
322 1.5 gwr if (fb->fb_pfour == 0)
323 1.5 gwr return;
324 1.5 gwr
325 1.5 gwr p4 = *fb->fb_pfour;
326 1.5 gwr p4type = P4_FBTYPE(p4);
327 1.5 gwr
328 1.5 gwr /* These do not encode the screen size. */
329 1.5 gwr if (p4type == P4_ID_COLOR24)
330 1.5 gwr return;
331 1.5 gwr if ((p4type & P4_ID_MASK) == P4_ID_FASTCOLOR)
332 1.5 gwr return;
333 1.5 gwr
334 1.5 gwr p4size = p4type & P4_SIZE_MASK;
335 1.5 gwr w = fb_p4sizedecode[p4size].w;
336 1.5 gwr h = fb_p4sizedecode[p4size].h;
337 1.5 gwr if (w && h) {
338 1.5 gwr fb->fb_fbtype.fb_width = w;
339 1.5 gwr fb->fb_fbtype.fb_height = h;
340 1.5 gwr } else {
341 1.5 gwr printf("%s: P4 size code %d unknown\n",
342 1.5 gwr fb->fb_name, p4size);
343 1.5 gwr }
344 1.5 gwr }
345