1 /* $NetBSD: cgthree.c,v 1.36 2022/09/25 21:30:29 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Paul Kranenburg.
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 * color display (cgthree) driver.
34 *
35 * Does not handle interrupts, even though they can occur.
36 *
37 * XXX should defer colormap updates to vertical retrace interrupts
38 */
39
40 #include <sys/cdefs.h>
41 __KERNEL_RCSID(0, "$NetBSD: cgthree.c,v 1.36 2022/09/25 21:30:29 thorpej Exp $");
42
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/buf.h>
46 #include <sys/device.h>
47 #include <sys/ioctl.h>
48 #include <sys/mman.h>
49 #include <sys/tty.h>
50 #include <sys/conf.h>
51
52 #include <sys/bus.h>
53 #include <machine/autoconf.h>
54
55 #include <dev/sun/fbio.h>
56 #include <dev/sun/fbvar.h>
57
58 #include <dev/sun/btreg.h>
59 #include <dev/sun/btvar.h>
60 #include <dev/sun/cgthreereg.h>
61 #include <dev/sun/cgthreevar.h>
62
63 #if NWSDISPLAY > 0
64 #include <dev/wscons/wsconsio.h>
65 #include <dev/wsfont/wsfont.h>
66 #include <dev/rasops/rasops.h>
67
68 #include "opt_wsemul.h"
69 #endif
70
71 #include "ioconf.h"
72
73 static void cgthreeunblank(device_t);
74 static void cgthreeloadcmap(struct cgthree_softc *, int, int);
75 static void cgthree_set_video(struct cgthree_softc *, int);
76 static int cgthree_get_video(struct cgthree_softc *);
77
78 dev_type_open(cgthreeopen);
79 dev_type_ioctl(cgthreeioctl);
80 dev_type_mmap(cgthreemmap);
81
82 const struct cdevsw cgthree_cdevsw = {
83 .d_open = cgthreeopen,
84 .d_close = nullclose,
85 .d_read = noread,
86 .d_write = nowrite,
87 .d_ioctl = cgthreeioctl,
88 .d_stop = nostop,
89 .d_tty = notty,
90 .d_poll = nopoll,
91 .d_mmap = cgthreemmap,
92 .d_kqfilter = nokqfilter,
93 .d_discard = nodiscard,
94 .d_flag = D_OTHER
95 };
96
97 /* frame buffer generic driver */
98 static struct fbdriver cgthreefbdriver = {
99 cgthreeunblank, cgthreeopen, nullclose, cgthreeioctl, nopoll,
100 cgthreemmap, nokqfilter
101 };
102
103 /* Video control parameters */
104 struct cg3_videoctrl {
105 unsigned char sense; /* Monitor sense value */
106 unsigned char vctrl[12];
107 } cg3_videoctrl[] = {
108 /* Missing entries: sense 0x10, 0x30, 0x50 */
109 { 0x40, /* this happens to be my 19'' 1152x900 gray-scale monitor */
110 {0xbb, 0x2b, 0x3, 0xb, 0xb3, 0x3, 0xaf, 0x2b, 0x2, 0xa, 0xff, 0x1}
111 },
112 { 0x00, /* default? must be last */
113 {0xbb, 0x2b, 0x3, 0xb, 0xb3, 0x3, 0xaf, 0x2b, 0x2, 0xa, 0xff, 0x1}
114 }
115 };
116
117 static void cg3_setup_palette(struct cgthree_softc *);
118
119 struct wsscreen_descr cgthree_defaultscreen = {
120 "std",
121 0, 0, /* will be filled in -- XXX shouldn't, it's global */
122 NULL, /* textops */
123 8, 16, /* font width/height */
124 WSSCREEN_WSCOLORS, /* capabilities */
125 NULL /* modecookie */
126 };
127
128 static int cgthree_ioctl(void *, void *, u_long, void *, int, struct lwp *);
129 static paddr_t cgthree_mmap(void *, void *, off_t, int);
130 static void cgthree_init_screen(void *, struct vcons_screen *, int, long *);
131
132 int cgthree_putcmap(struct cgthree_softc *, struct wsdisplay_cmap *);
133 int cgthree_getcmap(struct cgthree_softc *, struct wsdisplay_cmap *);
134
135 struct wsdisplay_accessops cgthree_accessops = {
136 cgthree_ioctl,
137 cgthree_mmap,
138 NULL, /* alloc_screen */
139 NULL, /* free_screen */
140 NULL, /* show_screen */
141 NULL, /* load_font */
142 NULL, /* pollc */
143 NULL /* scroll */
144 };
145
146 const struct wsscreen_descr *_cgthree_scrlist[] = {
147 &cgthree_defaultscreen
148 };
149
150 struct wsscreen_list cgthree_screenlist = {
151 sizeof(_cgthree_scrlist) / sizeof(struct wsscreen_descr *),
152 _cgthree_scrlist
153 };
154
155
156 extern const u_char rasops_cmap[768];
157
158 static struct vcons_screen cg3_console_screen;
159
160 void
cgthreeattach(struct cgthree_softc * sc,const char * name,int isconsole)161 cgthreeattach(struct cgthree_softc *sc, const char *name, int isconsole)
162 {
163 int i;
164 struct fbdevice *fb = &sc->sc_fb;
165 struct wsemuldisplaydev_attach_args aa;
166 struct rasops_info *ri = &cg3_console_screen.scr_ri;
167 unsigned long defattr;
168 volatile struct fbcontrol *fbc = sc->sc_fbc;
169 volatile struct bt_regs *bt = &fbc->fbc_dac;
170
171 fb->fb_driver = &cgthreefbdriver;
172 fb->fb_type.fb_cmsize = 256;
173 fb->fb_type.fb_size = fb->fb_type.fb_height * fb->fb_linebytes;
174 printf(": %s, %d x %d", name,
175 fb->fb_type.fb_width, fb->fb_type.fb_height);
176
177 /* Transfer video magic to board, if it's not running */
178 if ((fbc->fbc_ctrl & FBC_TIMING) == 0) {
179 int sense = (fbc->fbc_status & FBS_MSENSE);
180 /* Search table for video timings fitting this monitor */
181 for (i = 0; i < sizeof(cg3_videoctrl)/sizeof(cg3_videoctrl[0]);
182 i++) {
183 int j;
184 if (sense != cg3_videoctrl[i].sense)
185 continue;
186
187 printf(" setting video ctrl");
188 for (j = 0; j < 12; j++)
189 fbc->fbc_vcontrol[j] =
190 cg3_videoctrl[i].vctrl[j];
191 fbc->fbc_ctrl |= FBC_TIMING;
192 break;
193 }
194 }
195
196 /* make sure we are not blanked */
197 cgthree_set_video(sc, 1);
198 BT_INIT(bt, 0);
199
200 if (isconsole) {
201 printf(" (console)\n");
202 } else
203 printf("\n");
204
205 fb_attach(fb, isconsole);
206
207 sc->sc_width = fb->fb_type.fb_width;
208 sc->sc_stride = fb->fb_type.fb_width;
209 sc->sc_height = fb->fb_type.fb_height;
210
211 /* setup rasops and so on for wsdisplay */
212 sc->sc_mode = WSDISPLAYIO_MODE_EMUL;
213
214 vcons_init(&sc->vd, sc, &cgthree_defaultscreen, &cgthree_accessops);
215 sc->vd.init_screen = cgthree_init_screen;
216
217 if(isconsole) {
218 /* we mess with cg3_console_screen only once */
219 vcons_init_screen(&sc->vd, &cg3_console_screen, 1,
220 &defattr);
221 memset(sc->sc_fb.fb_pixels, (defattr >> 16) & 0xff,
222 sc->sc_stride * sc->sc_height);
223 cg3_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC;
224
225 cgthree_defaultscreen.textops = &ri->ri_ops;
226 cgthree_defaultscreen.capabilities = ri->ri_caps;
227 cgthree_defaultscreen.nrows = ri->ri_rows;
228 cgthree_defaultscreen.ncols = ri->ri_cols;
229 sc->vd.active = &cg3_console_screen;
230 wsdisplay_cnattach(&cgthree_defaultscreen, ri, 0, 0, defattr);
231 vcons_replay_msgbuf(&cg3_console_screen);
232 } else {
233 /*
234 * we're not the console so we just clear the screen and don't
235 * set up any sort of text display
236 */
237 }
238
239 /* Initialize the default color map. */
240 cg3_setup_palette(sc);
241
242 aa.scrdata = &cgthree_screenlist;
243 aa.console = isconsole;
244 aa.accessops = &cgthree_accessops;
245 aa.accesscookie = &sc->vd;
246 config_found(sc->sc_dev, &aa, wsemuldisplaydevprint, CFARGS_NONE);
247 }
248
249
250 int
cgthreeopen(dev_t dev,int flags,int mode,struct lwp * l)251 cgthreeopen(dev_t dev, int flags, int mode, struct lwp *l)
252 {
253 int unit = minor(dev);
254
255 if (device_lookup(&cgthree_cd, unit) == NULL)
256 return (ENXIO);
257 return (0);
258 }
259
260 int
cgthreeioctl(dev_t dev,u_long cmd,void * data,int flags,struct lwp * l)261 cgthreeioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l)
262 {
263 struct cgthree_softc *sc = device_lookup_private(&cgthree_cd,
264 minor(dev));
265 struct fbgattr *fba;
266 int error;
267
268 switch (cmd) {
269
270 case FBIOGTYPE:
271 *(struct fbtype *)data = sc->sc_fb.fb_type;
272 break;
273
274 case FBIOGATTR:
275 fba = (struct fbgattr *)data;
276 fba->real_type = sc->sc_fb.fb_type.fb_type;
277 fba->owner = 0; /* XXX ??? */
278 fba->fbtype = sc->sc_fb.fb_type;
279 fba->sattr.flags = 0;
280 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type;
281 fba->sattr.dev_specific[0] = -1;
282 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type;
283 fba->emu_types[1] = -1;
284 break;
285
286 case FBIOGETCMAP:
287 #define p ((struct fbcmap *)data)
288 return (bt_getcmap(p, &sc->sc_cmap, 256, 1));
289
290 case FBIOPUTCMAP:
291 /* copy to software map */
292 error = bt_putcmap(p, &sc->sc_cmap, 256, 1);
293 if (error)
294 return (error);
295 /* now blast them into the chip */
296 /* XXX should use retrace interrupt */
297 cgthreeloadcmap(sc, p->index, p->count);
298 #undef p
299 break;
300
301 case FBIOGVIDEO:
302 *(int *)data = cgthree_get_video(sc);
303 break;
304
305 case FBIOSVIDEO:
306 cgthree_set_video(sc, *(int *)data);
307 break;
308
309 default:
310 return (ENOTTY);
311 }
312 return (0);
313 }
314
315 /*
316 * Undo the effect of an FBIOSVIDEO that turns the video off.
317 */
318 static void
cgthreeunblank(device_t self)319 cgthreeunblank(device_t self)
320 {
321 struct cgthree_softc *sc = device_private(self);
322
323 cgthree_set_video(sc, 1);
324 }
325
326 static void
cgthree_set_video(struct cgthree_softc * sc,int enable)327 cgthree_set_video(struct cgthree_softc *sc, int enable)
328 {
329
330 if (enable)
331 sc->sc_fbc->fbc_ctrl |= FBC_VENAB;
332 else
333 sc->sc_fbc->fbc_ctrl &= ~FBC_VENAB;
334 }
335
336 static int
cgthree_get_video(struct cgthree_softc * sc)337 cgthree_get_video(struct cgthree_softc *sc)
338 {
339
340 return ((sc->sc_fbc->fbc_ctrl & FBC_VENAB) != 0);
341 }
342
343 /*
344 * Load a subset of the current (new) colormap into the Brooktree DAC.
345 */
346 static void
cgthreeloadcmap(struct cgthree_softc * sc,int start,int ncolors)347 cgthreeloadcmap(struct cgthree_softc *sc, int start, int ncolors)
348 {
349 volatile struct bt_regs *bt;
350 u_int *ip;
351 int count;
352
353 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */
354 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3;
355 bt = &sc->sc_fbc->fbc_dac;
356 bt->bt_addr = BT_D4M4(start);
357 while (--count >= 0)
358 bt->bt_cmap = *ip++;
359 }
360
361 /*
362 * Return the address that would map the given device at the given
363 * offset, allowing for the given protection, or return -1 for error.
364 *
365 * The cg3 is mapped starting at 256KB, for pseudo-compatibility with
366 * the cg4 (which had an overlay plane in the first 128K and an enable
367 * plane in the next 128K). X11 uses only 256k+ region but tries to
368 * map the whole thing, so we repeatedly map the first 256K to the
369 * first page of the color screen. If someone tries to use the overlay
370 * and enable regions, they will get a surprise....
371 *
372 * As well, mapping at an offset of 0x04000000 causes the cg3 to be
373 * mapped in flat mode without the cg4 emulation.
374 */
375 paddr_t
cgthreemmap(dev_t dev,off_t off,int prot)376 cgthreemmap(dev_t dev, off_t off, int prot)
377 {
378 struct cgthree_softc *sc = device_lookup_private(&cgthree_cd,
379 minor(dev));
380
381 #define START (128*1024 + 128*1024)
382 #define NOOVERLAY (0x04000000)
383
384 if (off & PGOFSET)
385 panic("cgthreemmap");
386 if (off < 0)
387 return (-1);
388 if ((u_int)off >= NOOVERLAY)
389 off -= NOOVERLAY;
390 else if ((u_int)off >= START)
391 off -= START;
392 else
393 off = 0;
394
395 if (off >= sc->sc_fb.fb_type.fb_size)
396 return (-1);
397
398 return (bus_space_mmap(sc->sc_bustag,
399 sc->sc_paddr, CG3REG_MEM + off,
400 prot, BUS_SPACE_MAP_LINEAR));
401 }
402
403 static void
cg3_setup_palette(struct cgthree_softc * sc)404 cg3_setup_palette(struct cgthree_softc *sc)
405 {
406 int i, j;
407
408 j = 0;
409 for (i = 0; i < 256; i++) {
410 sc->sc_cmap.cm_map[i][0] = rasops_cmap[j];
411 j++;
412 sc->sc_cmap.cm_map[i][1] = rasops_cmap[j];
413 j++;
414 sc->sc_cmap.cm_map[i][2] = rasops_cmap[j];
415 j++;
416 }
417 cgthreeloadcmap(sc, 0, 256);
418 }
419
420 int
cgthree_ioctl(void * v,void * vs,u_long cmd,void * data,int flag,struct lwp * l)421 cgthree_ioctl(void *v, void *vs, u_long cmd, void *data, int flag,
422 struct lwp *l)
423 {
424 /* we'll probably need to add more stuff here */
425 struct vcons_data *vd = v;
426 struct cgthree_softc *sc = vd->cookie;
427 struct wsdisplay_fbinfo *wdf;
428 struct vcons_screen *ms = sc->vd.active;
429 struct rasops_info *ri = &ms->scr_ri;
430 switch (cmd) {
431 case WSDISPLAYIO_GTYPE:
432 *(u_int *)data = WSDISPLAY_TYPE_SUNTCX;
433 return 0;
434 case WSDISPLAYIO_GINFO:
435 wdf = (void *)data;
436 wdf->height = ri->ri_height;
437 wdf->width = ri->ri_width;
438 wdf->depth = 8;
439 wdf->cmsize = 256;
440 return 0;
441
442 case WSDISPLAYIO_GETCMAP:
443 return cgthree_getcmap(sc,
444 (struct wsdisplay_cmap *)data);
445 case WSDISPLAYIO_PUTCMAP:
446 return cgthree_putcmap(sc,
447 (struct wsdisplay_cmap *)data);
448
449 case WSDISPLAYIO_SMODE:
450 {
451 int new_mode = *(int*)data;
452 if (new_mode != sc->sc_mode)
453 {
454 sc->sc_mode = new_mode;
455 if(new_mode == WSDISPLAYIO_MODE_EMUL)
456 {
457 cg3_setup_palette(sc);
458 vcons_redraw_screen(ms);
459 }
460 }
461 }
462 return 0;
463 case WSDISPLAYIO_GET_FBINFO:
464 {
465 struct wsdisplayio_fbinfo *fbi = data;
466
467 return wsdisplayio_get_fbinfo(&ms->scr_ri, fbi);
468 }
469 }
470 return EPASSTHROUGH;
471 }
472
473 paddr_t
cgthree_mmap(void * v,void * vs,off_t offset,int prot)474 cgthree_mmap(void *v, void *vs, off_t offset, int prot)
475 {
476 struct vcons_data *vd = v;
477 struct cgthree_softc *sc = vd->cookie;
478
479 if (offset < 0) return -1;
480 if (offset >= sc->sc_fb.fb_type.fb_size)
481 return -1;
482
483 return bus_space_mmap(sc->sc_bustag,
484 sc->sc_paddr, CG3REG_MEM + offset,
485 prot, BUS_SPACE_MAP_LINEAR);
486 }
487
488 int
cgthree_putcmap(struct cgthree_softc * sc,struct wsdisplay_cmap * cm)489 cgthree_putcmap(struct cgthree_softc *sc, struct wsdisplay_cmap *cm)
490 {
491 u_int index = cm->index;
492 u_int count = cm->count;
493 int error,i;
494 if (index >= 256 || count > 256 || index + count > 256)
495 return EINVAL;
496
497 for (i = 0; i < count; i++)
498 {
499 error = copyin(&cm->red[i],
500 &sc->sc_cmap.cm_map[index + i][0], 1);
501 if (error)
502 return error;
503 error = copyin(&cm->green[i],
504 &sc->sc_cmap.cm_map[index + i][1],
505 1);
506 if (error)
507 return error;
508 error = copyin(&cm->blue[i],
509 &sc->sc_cmap.cm_map[index + i][2], 1);
510 if (error)
511 return error;
512 }
513 cgthreeloadcmap(sc, index, count);
514
515 return 0;
516 }
517
518 int
cgthree_getcmap(struct cgthree_softc * sc,struct wsdisplay_cmap * cm)519 cgthree_getcmap(struct cgthree_softc *sc, struct wsdisplay_cmap *cm)
520 {
521 u_int index = cm->index;
522 u_int count = cm->count;
523 int error,i;
524
525 if (index >= 256 || count > 256 || index + count > 256)
526 return EINVAL;
527
528 for (i = 0; i < count; i++)
529 {
530 error = copyout(&sc->sc_cmap.cm_map[index + i][0],
531 &cm->red[i], 1);
532 if (error)
533 return error;
534 error = copyout(&sc->sc_cmap.cm_map[index + i][1],
535 &cm->green[i], 1);
536 if (error)
537 return error;
538 error = copyout(&sc->sc_cmap.cm_map[index + i][2],
539 &cm->blue[i], 1);
540 if (error)
541 return error;
542 }
543
544 return 0;
545 }
546
547 void
cgthree_init_screen(void * cookie,struct vcons_screen * scr,int existing,long * defattr)548 cgthree_init_screen(void *cookie, struct vcons_screen *scr,
549 int existing, long *defattr)
550 {
551 struct cgthree_softc *sc = cookie;
552 struct rasops_info *ri = &scr->scr_ri;
553
554 scr->scr_flags |= VCONS_DONT_READ;
555
556 ri->ri_depth = 8;
557 ri->ri_width = sc->sc_width;
558 ri->ri_height = sc->sc_height;
559 ri->ri_stride = sc->sc_stride;
560 ri->ri_flg = RI_CENTER;
561
562 ri->ri_bits = sc->sc_fb.fb_pixels;
563
564 rasops_init(ri, 0, 0);
565 ri->ri_caps = WSSCREEN_WSCOLORS | WSSCREEN_REVERSE;
566 rasops_reconfig(ri, sc->sc_height / ri->ri_font->fontheight,
567 sc->sc_width / ri->ri_font->fontwidth);
568
569 ri->ri_hw = scr;
570 }
571