1 /* $NetBSD: cgfour.c,v 1.51 2023/12/20 05:33:18 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * Copyright (c) 1992, 1993
34 * The Regents of the University of California. All rights reserved.
35 *
36 * This software was developed by the Computer Systems Engineering group
37 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
38 * contributed to Berkeley.
39 *
40 * All advertising materials mentioning features or use of this software
41 * must display the following acknowledgement:
42 * This product includes software developed by the University of
43 * California, Lawrence Berkeley Laboratory.
44 *
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
47 * are met:
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions and the following disclaimer.
50 * 2. Redistributions in binary form must reproduce the above copyright
51 * notice, this list of conditions and the following disclaimer in the
52 * documentation and/or other materials provided with the distribution.
53 * 3. Neither the name of the University nor the names of its contributors
54 * may be used to endorse or promote products derived from this software
55 * without specific prior written permission.
56 *
57 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
60 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
61 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
67 * SUCH DAMAGE.
68 *
69 * from @(#)cgthree.c 8.2 (Berkeley) 10/30/93
70 */
71
72 /*
73 * Copyright (c) 1995 Theo de Raadt. All rights reserved.
74 *
75 * Redistribution and use in source and binary forms, with or without
76 * modification, are permitted provided that the following conditions
77 * are met:
78 * 1. Redistributions of source code must retain the above copyright
79 * notice, this list of conditions and the following disclaimer.
80 * 2. Redistributions in binary form must reproduce the above copyright
81 * notice, this list of conditions and the following disclaimer in the
82 * documentation and/or other materials provided with the distribution.
83 *
84 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
85 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
86 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
87 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
88 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
89 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
90 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
91 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
92 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
93 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
94 */
95
96 /*
97 * color display (cgfour) driver.
98 *
99 * Does not handle interrupts, even though they can occur.
100 *
101 * XXX should defer colormap updates to vertical retrace interrupts
102 */
103
104 #include <sys/cdefs.h>
105 __KERNEL_RCSID(0, "$NetBSD: cgfour.c,v 1.51 2023/12/20 05:33:18 thorpej Exp $");
106
107 #include <sys/param.h>
108 #include <sys/systm.h>
109 #include <sys/buf.h>
110 #include <sys/device.h>
111 #include <sys/ioctl.h>
112 #include <sys/mman.h>
113 #include <sys/tty.h>
114 #include <sys/conf.h>
115
116 #include <machine/autoconf.h>
117 #include <machine/eeprom.h>
118
119 #include <dev/sun/fbio.h>
120 #include <dev/sun/fbvar.h>
121 #include <dev/sun/btreg.h>
122 #include <dev/sun/btvar.h>
123 #include <dev/sun/pfourreg.h>
124
125 /* per-display variables */
126 struct cgfour_softc {
127 struct fbdevice sc_fb; /* frame buffer device */
128 bus_space_tag_t sc_bustag;
129 bus_addr_t sc_paddr; /* phys address for device mmap() */
130
131 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */
132 union bt_cmap sc_cmap; /* Brooktree color map */
133 };
134
135 /* autoconfiguration driver */
136 static int cgfourmatch(device_t, cfdata_t, void *);
137 static void cgfourattach(device_t, device_t, void *);
138
139 #if defined(SUN4)
140 static void cgfourunblank(device_t);
141 #endif
142
143 static int cg4_pfour_probe(void *, void *);
144
145 CFATTACH_DECL_NEW(cgfour, sizeof(struct cgfour_softc),
146 cgfourmatch, cgfourattach, NULL, NULL);
147
148 extern struct cfdriver cgfour_cd;
149
150 dev_type_open(cgfouropen);
151 dev_type_ioctl(cgfourioctl);
152 dev_type_mmap(cgfourmmap);
153
154 const struct cdevsw cgfour_cdevsw = {
155 .d_open = cgfouropen,
156 .d_close = nullclose,
157 .d_read = noread,
158 .d_write = nowrite,
159 .d_ioctl = cgfourioctl,
160 .d_stop = nostop,
161 .d_tty = notty,
162 .d_poll = nopoll,
163 .d_mmap = cgfourmmap,
164 .d_kqfilter = nokqfilter,
165 .d_discard = nodiscard,
166 .d_flag = 0
167 };
168
169 #if defined(SUN4)
170 /* frame buffer generic driver */
171 static struct fbdriver cgfourfbdriver = {
172 cgfourunblank, cgfouropen, nullclose, cgfourioctl, nopoll,
173 cgfourmmap, nokqfilter
174 };
175
176 static void cgfourloadcmap(struct cgfour_softc *, int, int);
177 static int cgfour_get_video(struct cgfour_softc *);
178 static void cgfour_set_video(struct cgfour_softc *, int);
179 #endif
180
181 /*
182 * Match a cgfour.
183 */
184 static int
cgfourmatch(device_t parent,cfdata_t cf,void * aux)185 cgfourmatch(device_t parent, cfdata_t cf, void *aux)
186 {
187 union obio_attach_args *uoba = aux;
188 struct obio4_attach_args *oba;
189
190 if (uoba->uoba_isobio4 == 0)
191 return (0);
192
193 oba = &uoba->uoba_oba4;
194 return (bus_space_probe(oba->oba_bustag, oba->oba_paddr,
195 4, /* probe size */
196 0, /* offset */
197 0, /* flags */
198 cg4_pfour_probe, NULL));
199 }
200
201 static int
cg4_pfour_probe(void * vaddr,void * arg)202 cg4_pfour_probe(void *vaddr, void *arg)
203 {
204
205 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR8P1);
206 }
207
208 /*
209 * Attach a display. We need to notice if it is the console, too.
210 */
211 static void
cgfourattach(device_t parent,device_t self,void * aux)212 cgfourattach(device_t parent, device_t self, void *aux)
213 {
214 #if defined(SUN4)
215 struct cgfour_softc *sc = device_private(self);
216 union obio_attach_args *uoba = aux;
217 struct obio4_attach_args *oba = &uoba->uoba_oba4;
218 bus_space_handle_t bh;
219 volatile struct bt_regs *bt;
220 struct fbdevice *fb = &sc->sc_fb;
221 int ramsize, i, isconsole;
222
223 sc->sc_bustag = oba->oba_bustag;
224 sc->sc_paddr = (bus_addr_t)oba->oba_paddr;
225
226 /* Map the pfour register. */
227 if (bus_space_map(oba->oba_bustag, oba->oba_paddr,
228 sizeof(uint32_t),
229 BUS_SPACE_MAP_LINEAR,
230 &bh) != 0) {
231 printf("%s: cannot map control registers\n",
232 device_xname(self));
233 return;
234 }
235 fb->fb_pfour = (volatile uint32_t *)bh;
236
237 fb->fb_driver = &cgfourfbdriver;
238 fb->fb_device = self;
239 fb->fb_type.fb_type = FBTYPE_SUN4COLOR;
240 fb->fb_flags = device_cfdata(self)->cf_flags & FB_USERMASK;
241 fb->fb_flags |= FB_PFOUR;
242
243 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY;
244
245 fb->fb_type.fb_depth = 8;
246 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900);
247
248 fb->fb_type.fb_cmsize = 256;
249 fb->fb_type.fb_size = ramsize;
250 printf(": cgfour/p4, %d x %d",
251 fb->fb_type.fb_width, fb->fb_type.fb_height);
252
253 isconsole = 0;
254
255 if (CPU_ISSUN4) {
256 struct eeprom *eep = (struct eeprom *)eeprom_va;
257
258 /*
259 * Assume this is the console if there's no eeprom info
260 * to be found.
261 */
262 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT)
263 isconsole = fb_is_console(0);
264 }
265
266 #if 0
267 /*
268 * We don't do any of the console handling here. Instead,
269 * we let the bwtwo driver pick up the overlay plane and
270 * use it instead. Rconsole should have better performance
271 * with the 1-bit depth.
272 * -- Jason R. Thorpe <thorpej@NetBSD.org>
273 */
274
275 /*
276 * When the ROM has mapped in a cgfour display, the address
277 * maps only the video RAM, so in any case we have to map the
278 * registers ourselves. We only need the video RAM if we are
279 * going to print characters via rconsole.
280 */
281
282 if (isconsole) {
283 /* XXX this is kind of a waste */
284 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg,
285 PFOUR_COLOR_OFF_OVERLAY, ramsize);
286 }
287 #endif
288
289 /* Map the Brooktree. */
290 if (bus_space_map(oba->oba_bustag,
291 oba->oba_paddr + PFOUR_COLOR_OFF_CMAP,
292 sizeof(struct fbcontrol),
293 BUS_SPACE_MAP_LINEAR,
294 &bh) != 0) {
295 printf("%s: cannot map control registers\n",
296 device_xname(self));
297 return;
298 }
299 sc->sc_fbc = (volatile struct fbcontrol *)bh;
300
301 /* grab initial (current) color map */
302 bt = &sc->sc_fbc->fbc_dac;
303 bt->bt_addr = 0;
304 for (i = 0; i < 256 * 3 / 4; i++)
305 ((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24;
306
307 BT_INIT(bt, 24);
308
309 #if 0 /* See above. */
310 if (isconsole) {
311 printf(" (console)\n");
312 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */
313 fbrcons_init(fb);
314 #endif
315 } else
316 #endif /* 0 */
317 printf("\n");
318
319 /*
320 * Even though we're not using rconsole, we'd still like
321 * to notice if we're the console framebuffer.
322 */
323 fb_attach(fb, isconsole);
324 #endif /* SUN4 */
325 }
326
327 int
cgfouropen(dev_t dev,int flags,int mode,struct lwp * l)328 cgfouropen(dev_t dev, int flags, int mode, struct lwp *l)
329 {
330 int unit = minor(dev);
331
332 if (device_lookup(&cgfour_cd, unit) == NULL)
333 return (ENXIO);
334 return (0);
335 }
336
337 int
cgfourioctl(dev_t dev,u_long cmd,void * data,int flags,struct lwp * l)338 cgfourioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l)
339 {
340 #if defined(SUN4)
341 struct cgfour_softc *sc = device_lookup_private(&cgfour_cd, minor(dev));
342 struct fbgattr *fba;
343 int error;
344
345 switch (cmd) {
346
347 case FBIOGTYPE:
348 *(struct fbtype *)data = sc->sc_fb.fb_type;
349 break;
350
351 case FBIOGATTR:
352 fba = (struct fbgattr *)data;
353 fba->real_type = sc->sc_fb.fb_type.fb_type;
354 fba->owner = 0; /* XXX ??? */
355 fba->fbtype = sc->sc_fb.fb_type;
356 fba->sattr.flags = 0;
357 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type;
358 fba->sattr.dev_specific[0] = -1;
359 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type;
360 fba->emu_types[1] = -1;
361 break;
362
363 case FBIOGETCMAP:
364 #define p ((struct fbcmap *)data)
365 return (bt_getcmap(p, &sc->sc_cmap, 256, 1));
366
367 case FBIOPUTCMAP:
368 /* copy to software map */
369 error = bt_putcmap(p, &sc->sc_cmap, 256, 1);
370 if (error)
371 return (error);
372 /* now blast them into the chip */
373 /* XXX should use retrace interrupt */
374 cgfourloadcmap(sc, p->index, p->count);
375 #undef p
376 break;
377
378 case FBIOGVIDEO:
379 *(int *)data = cgfour_get_video(sc);
380 break;
381
382 case FBIOSVIDEO:
383 cgfour_set_video(sc, *(int *)data);
384 break;
385
386 default:
387 return (ENOTTY);
388 }
389 #endif /* SUN4 */
390
391 return (0);
392 }
393
394 /*
395 * Return the address that would map the given device at the given
396 * offset, allowing for the given protection, or return -1 for error.
397 *
398 * the cg4 maps its overlay plane for 128K, followed by the enable
399 * plane for 128K, followed by the colour plane (for as much colour
400 * as their is.)
401 *
402 * As well, mapping at an offset of 0x04000000 causes the cg4 to map
403 * only its colour plane, at 0.
404 */
405 paddr_t
cgfourmmap(dev_t dev,off_t off,int prot)406 cgfourmmap(dev_t dev, off_t off, int prot)
407 {
408 struct cgfour_softc *sc = device_lookup_private(&cgfour_cd, minor(dev));
409 off_t poff;
410
411 #define START_ENABLE (128*1024)
412 #define START_COLOR ((128*1024) + (128*1024))
413 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \
414 sc->sc_fb.fb_type.fb_height)
415 #define END_COLOR (START_COLOR + COLOR_SIZE)
416 #define NOOVERLAY (0x04000000)
417
418 if (off & PGOFSET)
419 panic("cgfourmap");
420
421 if (off < 0)
422 return (-1);
423 else if ((u_int)off >= NOOVERLAY) {
424 off -= NOOVERLAY;
425
426 /*
427 * X11 maps a huge chunk of the frame buffer; far more than
428 * there really is. We compensate by double-mapping the
429 * first page for as many other pages as it wants
430 */
431 while ((u_int)off >= COLOR_SIZE)
432 off -= COLOR_SIZE; /* XXX thorpej ??? */
433
434 poff = off + PFOUR_COLOR_OFF_COLOR;
435 } else if ((u_int)off < START_ENABLE) {
436 /*
437 * in overlay plane
438 */
439 poff = PFOUR_COLOR_OFF_OVERLAY + off;
440 } else if ((u_int)off < START_COLOR) {
441 /*
442 * in enable plane
443 */
444 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE;
445 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) {
446 /*
447 * in colour plane
448 */
449 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR;
450 } else
451 return (-1);
452
453 return (bus_space_mmap(sc->sc_bustag,
454 sc->sc_paddr, poff,
455 prot, BUS_SPACE_MAP_LINEAR));
456 }
457
458 #if defined(SUN4)
459 /*
460 * Undo the effect of an FBIOSVIDEO that turns the video off.
461 */
462 static void
cgfourunblank(device_t dev)463 cgfourunblank(device_t dev)
464 {
465
466 cgfour_set_video(device_private(dev), 1);
467 }
468
469 static int
cgfour_get_video(struct cgfour_softc * sc)470 cgfour_get_video(struct cgfour_softc *sc)
471 {
472
473 return (fb_pfour_get_video(&sc->sc_fb));
474 }
475
476 static void
cgfour_set_video(struct cgfour_softc * sc,int enable)477 cgfour_set_video(struct cgfour_softc *sc, int enable)
478 {
479
480 fb_pfour_set_video(&sc->sc_fb, enable);
481 }
482
483 /*
484 * Load a subset of the current (new) colormap into the Brooktree DAC.
485 */
486 static void
cgfourloadcmap(struct cgfour_softc * sc,int start,int ncolors)487 cgfourloadcmap(struct cgfour_softc *sc, int start, int ncolors)
488 {
489 volatile struct bt_regs *bt;
490 u_int *ip, i;
491 int count;
492
493 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */
494 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3;
495 bt = &sc->sc_fbc->fbc_dac;
496 bt->bt_addr = BT_D4M4(start) << 24;
497 while (--count >= 0) {
498 i = *ip++;
499 /* hardware that makes one want to pound boards with hammers */
500 bt->bt_cmap = i;
501 bt->bt_cmap = i << 8;
502 bt->bt_cmap = i << 16;
503 bt->bt_cmap = i << 24;
504 }
505 }
506 #endif /* SUN4 */
507