summaryrefslogtreecommitdiff
path: root/sys/arch/sparc/dev/cgtwelve.c
blob: a2e29bbc8bc24f90b7dd6501f9bb3cb34e5c9153 (plain)
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
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
/*	$OpenBSD: cgtwelve.c,v 1.4 2002/09/23 18:13:38 miod Exp $	*/

/*
 * Copyright (c) 2002 Miodrag Vallat.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * cgtwelve (GS) accelerated 24-bit framebuffer driver.
 *
 * Enough experiments and SMI's cg12reg.h made this possible.
 */

/*
 * The cgtwelve framebuffer is a 3-slot SBUS card, that will fit only in
 * SPARCstation 1, 1+, 2 and 5, or in an xbox SBUS extension (untested).
 *
 * It is a 24-bit 3D accelerated framebuffer made by Matrox, featuring 4MB
 * (regular model) or 8MB (high-res model) of video memory, a complex windowing
 * engine, double buffering modes, three video planes (overlay, 8 bit and 24 bit
 * color), and a lot of colormap combinations.
 *
 * All of this is driven by a set of three Bt462 ramdacs, and a couple of
 * Matrox-specific chips.
 *
 * XXX The high res card is untested.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/mman.h>
#include <sys/tty.h>
#include <sys/conf.h>

#include <uvm/uvm_extern.h>

#include <machine/autoconf.h>
#include <machine/pmap.h>
#include <machine/cpu.h>
#include <machine/conf.h>

#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsdisplayvar.h>
#include <dev/wscons/wscons_raster.h>
#include <dev/rasops/rasops.h>
#include <machine/fbvar.h>

#include <sparc/dev/cgtwelvereg.h>
#include <sparc/dev/sbusvar.h>

#include <dev/cons.h>	/* for prom console hook */

/* per-display variables */
struct cgtwelve_softc {
	struct	sunfb	sc_sunfb;	/* common base device */
	struct	sbusdev sc_sd;		/* sbus device */
	struct	rom_reg sc_phys;

	volatile struct cgtwelve_dpu *sc_dpu;
	volatile struct cgtwelve_apu *sc_apu;
	volatile struct cgtwelve_dac *sc_ramdac;	/* RAMDAC registers */
	volatile u_char *sc_overlay;	/* overlay or enable plane */
	volatile u_long *sc_inten;	/* true color plane */

	int	sc_highres;
	int	sc_nscreens;
};

struct wsscreen_descr cgtwelve_stdscreen = {
	"std",
};

const struct wsscreen_descr *cgtwelve_scrlist[] = {
	&cgtwelve_stdscreen,
};

struct wsscreen_list cgtwelve_screenlist = {
	sizeof(cgtwelve_scrlist) / sizeof(struct wsscreen_descr *),
	    cgtwelve_scrlist
};

int cgtwelve_ioctl(void *, u_long, caddr_t, int, struct proc *);
int cgtwelve_alloc_screen(void *, const struct wsscreen_descr *, void **,
    int *, int *, long *);
void cgtwelve_free_screen(void *, void *);
int cgtwelve_show_screen(void *, void *, int, void (*cb)(void *, int, int),
    void *);
paddr_t cgtwelve_mmap(void *, off_t, int);
void cgtwelve_reset(struct cgtwelve_softc *);
void cgtwelve_burner(void *, u_int, u_int);
void cgtwelve_prom(void *);

static __inline__ void cgtwelve_ramdac_wraddr(struct cgtwelve_softc *sc,
    u_int32_t addr);
void cgtwelve_initcmap(struct cgtwelve_softc *);
void cgtwelve_darkcmap(struct cgtwelve_softc *);

struct wsdisplay_accessops cgtwelve_accessops = {
	cgtwelve_ioctl,
	cgtwelve_mmap,
	cgtwelve_alloc_screen,
	cgtwelve_free_screen,
	cgtwelve_show_screen,
	NULL,	/* load_font */
	NULL,	/* scrollback */
	NULL,	/* getchar */
	cgtwelve_burner
};

int cgtwelvematch(struct device *, void *, void *);
void cgtwelveattach(struct device *, struct device *, void *);

struct cfattach cgtwelve_ca = {
	sizeof(struct cgtwelve_softc), cgtwelvematch, cgtwelveattach
};

struct cfdriver cgtwelve_cd = {
	NULL, "cgtwelve", DV_DULL
};


/*
 * Match a cgtwelve.
 */
int
cgtwelvematch(parent, vcf, aux)
	struct device *parent;
	void *vcf, *aux;
{
	struct cfdata *cf = vcf;
	struct confargs *ca = aux;
	struct romaux *ra = &ca->ca_ra;

	if (strcmp(cf->cf_driver->cd_name, ra->ra_name))
		return (0);

	if (ca->ca_bustype == BUS_SBUS)
		return (1);

	return (0);
}

/*
 * Attach a display.
 */
void
cgtwelveattach(parent, self, args)
	struct device *parent, *self;
	void *args;
{
	struct cgtwelve_softc *sc = (struct cgtwelve_softc *)self;
	struct confargs *ca = args;
	struct wsemuldisplaydev_attach_args waa;
	int fb_depth, node;
	int isconsole = 0;
	char *ps;

	sc->sc_sunfb.sf_flags = self->dv_cfdata->cf_flags & FB_USERMASK;
	node = ca->ca_ra.ra_node;

	printf(": %s", getpropstring(node, "model"));
	ps = getpropstring(node, "dev_id");
	if (*ps != '\0')
		printf(" (%s)", ps);
	printf("\n");

	isconsole = node == fbnode;

	sc->sc_phys = ca->ca_ra.ra_reg[0];

	/*
	 * Map registers
	 */
	sc->sc_dpu = (struct cgtwelve_dpu *)mapiodev(ca->ca_ra.ra_reg,
	    CG12_OFF_DPU, sizeof(struct cgtwelve_dpu));
	sc->sc_apu = (struct cgtwelve_apu *)mapiodev(ca->ca_ra.ra_reg,
	    CG12_OFF_APU, sizeof(struct cgtwelve_apu));
	sc->sc_ramdac = (struct cgtwelve_dac *)mapiodev(ca->ca_ra.ra_reg,
	    CG12_OFF_DAC, sizeof(struct cgtwelve_dac));

	/*
	 * Compute framebuffer size
	 */
	if (ISSET(sc->sc_sunfb.sf_flags, FB_FORCELOW))
		fb_depth = 1;
	else
		fb_depth = 32;

	fb_setsize(&sc->sc_sunfb, fb_depth, CG12_WIDTH, CG12_HEIGHT,
	    node, ca->ca_bustype);

	if (fb_depth == 1 && sc->sc_sunfb.sf_depth == 32) {
		/* the prom will report depth == 32, so compensate */
		sc->sc_sunfb.sf_depth = 1;
		sc->sc_sunfb.sf_linebytes = sc->sc_sunfb.sf_width / 8;
		sc->sc_sunfb.sf_fbsize = sc->sc_sunfb.sf_height *
		    sc->sc_sunfb.sf_linebytes;
	}

	sc->sc_highres = sc->sc_sunfb.sf_width == CG12_WIDTH_HR;

	/*
	 * Map planes
	 */
	sc->sc_overlay = mapiodev(ca->ca_ra.ra_reg,
	    sc->sc_highres ? CG12_OFF_OVERLAY0_HR : CG12_OFF_OVERLAY0,
	    round_page(sc->sc_highres ? CG12_SIZE_OVERLAY_HR :
	        CG12_SIZE_OVERLAY));
	if (sc->sc_sunfb.sf_depth != 1)
		sc->sc_inten = mapiodev(ca->ca_ra.ra_reg,
		    sc->sc_highres ? CG12_OFF_INTEN_HR : CG12_OFF_INTEN,
		    round_page(sc->sc_highres ? CG12_SIZE_COLOR24_HR :
		        CG12_SIZE_COLOR24));

	/* reset cursor & frame buffer controls */
	cgtwelve_reset(sc);

	if (sc->sc_sunfb.sf_depth != 1) {
		/* enable video */
		cgtwelve_burner(sc, 1, 0);
	}

	if (sc->sc_sunfb.sf_depth == 1)
		sc->sc_sunfb.sf_ro.ri_bits = (void *)sc->sc_overlay;
	else 
		sc->sc_sunfb.sf_ro.ri_bits = (void *)sc->sc_inten;

	sc->sc_sunfb.sf_ro.ri_hw = sc;
	fbwscons_init(&sc->sc_sunfb, isconsole);

	cgtwelve_stdscreen.capabilities = sc->sc_sunfb.sf_ro.ri_caps;
	cgtwelve_stdscreen.nrows = sc->sc_sunfb.sf_ro.ri_rows;
	cgtwelve_stdscreen.ncols = sc->sc_sunfb.sf_ro.ri_cols;
	cgtwelve_stdscreen.textops = &sc->sc_sunfb.sf_ro.ri_ops;

	if (isconsole) {
		if (sc->sc_sunfb.sf_depth == 1) {
			fbwscons_console_init(&sc->sc_sunfb,
			    &cgtwelve_stdscreen, -1, NULL, NULL);
		} else {
			/*
			 * Since the screen has been cleared, restart at the
			 * top of the screen.
			 */
			fbwscons_console_init(&sc->sc_sunfb,
			    &cgtwelve_stdscreen, 0, NULL, cgtwelve_burner);
		}
	}

	sbus_establish(&sc->sc_sd, &sc->sc_sunfb.sf_dev);

	printf("%s: %dx%d", self->dv_xname,
	    sc->sc_sunfb.sf_width, sc->sc_sunfb.sf_height);
	ps = getpropstring(node, "ucoderev");
	if (*ps != '\0')
		printf(", microcode rev. %s", ps);
	printf("\n");

	waa.console = isconsole;
	waa.scrdata = &cgtwelve_screenlist;
	waa.accessops = &cgtwelve_accessops;
	waa.accesscookie = sc;
	config_found(self, &waa, wsemuldisplaydevprint);
}

int
cgtwelve_ioctl(dev, cmd, data, flags, p)
	void *dev;
	u_long cmd;
	caddr_t data;
	int flags;
	struct proc *p;
{
	struct cgtwelve_softc *sc = dev;
	struct wsdisplay_fbinfo *wdf;

	switch (cmd) {
	case WSDISPLAYIO_GTYPE:
		if (sc->sc_sunfb.sf_depth == 1)
			*(u_int *)data = WSDISPLAY_TYPE_SUNBW;
		else
			*(u_int *)data = WSDISPLAY_TYPE_SUN24;
		break;
	case WSDISPLAYIO_GINFO:
		wdf = (struct wsdisplay_fbinfo *)data;
		wdf->height = sc->sc_sunfb.sf_height;
		wdf->width = sc->sc_sunfb.sf_width;
		wdf->depth = sc->sc_sunfb.sf_depth;
		wdf->cmsize = 0;
		break;
	case WSDISPLAYIO_LINEBYTES:
		*(u_int *)data = sc->sc_sunfb.sf_linebytes;
		break;

	case WSDISPLAYIO_GETCMAP:
	case WSDISPLAYIO_PUTCMAP:
		break;

	case WSDISPLAYIO_SVIDEO:
	case WSDISPLAYIO_GVIDEO:
	case WSDISPLAYIO_GCURPOS:
	case WSDISPLAYIO_SCURPOS:
	case WSDISPLAYIO_GCURMAX:
	case WSDISPLAYIO_GCURSOR:
	case WSDISPLAYIO_SCURSOR:
	default:
		return (-1);	/* not supported yet */
	}

	return (0);
}

/*
 * Clean up hardware state (e.g., after bootup or after X crashes).
 */
void
cgtwelve_reset(sc)
	struct cgtwelve_softc *sc;
{
	if (sc->sc_sunfb.sf_depth == 1)
		return;

	/*
	 * Select the overlay plane as sc_overlay.
	 */
	sc->sc_apu->hpage =
	    sc->sc_highres ? CG12_HPAGE_OVERLAY_HR : CG12_HPAGE_OVERLAY;
	sc->sc_apu->haccess = CG12_HACCESS_OVERLAY;
	sc->sc_dpu->pln_sl_host = CG12_PLN_SL_OVERLAY;
	sc->sc_dpu->pln_rd_msk_host = CG12_PLN_RD_OVERLAY;
	sc->sc_dpu->pln_wr_msk_host = CG12_PLN_WR_OVERLAY;

	/*
	 * Do not attempt to somewhat preserve screen contents - reading the
	 * overlay plane and writing to the color plane at the same time is not
	 * reliable, and allocating memory to save a copy of the overlay plane
	 * would be awful.
	 */
	bzero((void *)sc->sc_overlay,
	    sc->sc_highres ? CG12_SIZE_OVERLAY_HR : CG12_SIZE_OVERLAY);

	/*
	 * Select the enable plane as sc_overlay, and clear it.
	 */
	sc->sc_apu->hpage =
	    sc->sc_highres ? CG12_HPAGE_ENABLE_HR : CG12_HPAGE_ENABLE;
	sc->sc_apu->haccess = CG12_HACCESS_ENABLE;
	sc->sc_dpu->pln_sl_host = CG12_PLN_SL_ENABLE;
	sc->sc_dpu->pln_rd_msk_host = CG12_PLN_RD_ENABLE;
	sc->sc_dpu->pln_wr_msk_host = CG12_PLN_WR_ENABLE;

	bzero((void *)sc->sc_overlay,
	    sc->sc_highres ? CG12_SIZE_ENABLE_HR : CG12_SIZE_ENABLE);

	/*
	 * Select the intensity (color) plane, and clear it.
	 */
	sc->sc_apu->hpage =
	    sc->sc_highres ? CG12_HPAGE_24BIT_HR : CG12_HPAGE_24BIT;
	sc->sc_apu->haccess = CG12_HACCESS_24BIT;
	sc->sc_dpu->pln_sl_host = CG12_PLN_SL_24BIT;
	sc->sc_dpu->pln_rd_msk_host = CG12_PLN_RD_24BIT;
	sc->sc_dpu->pln_wr_msk_host = CG12_PLN_WR_24BIT;

	memset((void *)sc->sc_inten, 0x00ffffff,
	    sc->sc_highres ? CG12_SIZE_COLOR24_HR : CG12_SIZE_COLOR24);

	shutdownhook_establish(cgtwelve_prom, sc);
}

/*
 * Return the address that would map the given device at the given
 * offset, allowing for the given protection, or return -1 for error.
 */
paddr_t
cgtwelve_mmap(v, offset, prot)
	void *v;
	off_t offset;
	int prot;
{
	struct cgtwelve_softc *sc = v;

	if (offset & PGOFSET)
		return (-1);

	/* Allow mapping as a dumb framebuffer from offset 0 */
	if (offset >= 0 && offset < sc->sc_sunfb.sf_fbsize) {
		if (sc->sc_sunfb.sf_depth == 1) {
			return (REG2PHYS(&sc->sc_phys,
			    (sc->sc_highres ? CG12_OFF_OVERLAY0_HR :
			    CG12_OFF_OVERLAY0) + offset) | PMAP_NC);
		} else {
			return (REG2PHYS(&sc->sc_phys,
			    (sc->sc_highres ? CG12_OFF_INTEN_HR :
			    CG12_OFF_INTEN) + offset) | PMAP_NC);
		}
	}

	return (-1);	/* not a user-map offset */
}

int
cgtwelve_alloc_screen(v, type, cookiep, curxp, curyp, attrp)
	void *v;
	const struct wsscreen_descr *type;
	void **cookiep;
	int *curxp, *curyp;
	long *attrp;
{
	struct cgtwelve_softc *sc = v;

	if (sc->sc_nscreens > 0)
		return (ENOMEM);

	*cookiep = &sc->sc_sunfb.sf_ro;
	*curyp = 0;
	*curxp = 0;
	sc->sc_sunfb.sf_ro.ri_ops.alloc_attr(&sc->sc_sunfb.sf_ro,
	     0, 0, 0, attrp);
	sc->sc_nscreens++;
	return (0);
}

void
cgtwelve_free_screen(v, cookie)
	void *v;
	void *cookie;
{
	struct cgtwelve_softc *sc = v;

	sc->sc_nscreens--;
}

int
cgtwelve_show_screen(v, cookie, waitok, cb, cbarg)
	void *v;
	void *cookie;
	int waitok;
	void (*cb)(void *, int, int);
	void *cbarg;
{
	return (0);
}

/*
 * Simple Bt462 programming routines.
 */

static __inline__ void 
cgtwelve_ramdac_wraddr(struct cgtwelve_softc *sc, u_int32_t addr)
{
	sc->sc_ramdac->addr_lo = (addr & 0xff);
	sc->sc_ramdac->addr_hi = ((addr >> 8) & 0xff);
}

void
cgtwelve_initcmap(sc)
	struct cgtwelve_softc *sc;
{
	u_int32_t c;

	/*
	 * Since we are using the framebuffer in true color mode, there is
	 * theoretically no ramdac initialisation to do.
	 * In practice, we have to load a ramp on each ramdac first.
	 * Fortunately they are latched on each other at this point, so by
	 * loading one single ramp, all of them get initialized.
	 */
	cgtwelve_ramdac_wraddr(sc, 0);
	for (c = 0; c < 256; c++)
		sc->sc_ramdac->color = c | (c << 8) | (c << 16);
}

void
cgtwelve_darkcmap(sc)
	struct cgtwelve_softc *sc;
{
	u_int32_t c;

	cgtwelve_ramdac_wraddr(sc, 0);
	for (c = 0; c < 256; c++)
		sc->sc_ramdac->color = 0;
}

void cgtwelve_burner(v, on, flags)
	void *v;
	u_int on, flags;
{
	struct cgtwelve_softc *sc = v;

	if (sc->sc_sunfb.sf_depth == 1)
		return;

	if (on)
		cgtwelve_initcmap(sc);
	else
		cgtwelve_darkcmap(sc);
}

/*
 * Shutdown hook used to restore PROM-compatible video mode on shutdown,
 * so that the PROM prompt is visible again.
 */
void
cgtwelve_prom(v)
	void *v;
{
	struct cgtwelve_softc *sc = v;
	int c;
	extern struct consdev consdev_prom;

	/*
	 * Select the overlay plane.
	 */
	sc->sc_apu->hpage =
	    sc->sc_highres ? CG12_HPAGE_OVERLAY_HR : CG12_HPAGE_OVERLAY;
	sc->sc_apu->haccess = CG12_HACCESS_OVERLAY;
	sc->sc_dpu->pln_sl_host = CG12_PLN_SL_OVERLAY;
	sc->sc_dpu->pln_rd_msk_host = CG12_PLN_RD_OVERLAY;
	sc->sc_dpu->pln_wr_msk_host = CG12_PLN_WR_OVERLAY;

	/*
	 * Do not touch enable and intensity planes, so that kernel
	 * messages can still be read when back to the prom.
	 * However, we need to fix the colormap, or the prompt will come
	 * back as white on white.
	 */
	cgtwelve_ramdac_wraddr(sc, 0);
	sc->sc_ramdac->color = 0x00ffffff;
	for (c = 1; c < 256; c++)
		sc->sc_ramdac->color = 0x00000000;

	/*
	 * Go back to prom output for the last few messages, so they
	 * will be displayed correctly.
	 */
	cn_tab = &consdev_prom;
}