summaryrefslogtreecommitdiff
path: root/sys/arch/mac68k/dev/grf_compat.c
blob: c5646469d45b798e50edec6daca9296985da51a3 (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
/*	$NetBSD: grf_compat.c,v 1.29 2019/11/10 21:16:29 chs Exp $	*/

/*
 * Copyright (C) 1999 Scott Reynolds
 * 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * 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.
 */

/*
 * macfb compatibility with legacy grf devices
 */

#include "opt_grf_compat.h"

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: grf_compat.c,v 1.29 2019/11/10 21:16:29 chs Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/resourcevar.h>

#include <machine/bus.h>
#include <machine/grfioctl.h>

#include <mac68k/nubus/nubus.h>
#include <mac68k/dev/grfvar.h>
#include <mac68k/dev/macfbvar.h>

#include <miscfs/specfs/specdev.h>

#include <uvm/uvm_extern.h>

#include "ioconf.h"

dev_type_open(grfopen);
dev_type_close(grfclose);
dev_type_ioctl(grfioctl);
dev_type_mmap(grfmmap);

const struct cdevsw grf_cdevsw = {
	.d_open = grfopen,
	.d_close = grfclose,
	.d_read = noread,
	.d_write = nowrite,
	.d_ioctl = grfioctl,
	.d_stop = nostop,
	.d_tty = notty,
	.d_poll = nopoll,
	.d_mmap = grfmmap,
	.d_kqfilter = nokqfilter,
	.d_discard = nodiscard,
	.d_flag = 0
};

void	grf_scinit(struct grf_softc *, const char *, int);
void	grf_init(int);
int	grfmap(dev_t, struct macfb_softc *, void **, struct proc *);
int	grfunmap(dev_t, struct macfb_softc *, void *, struct proc *);

/* Non-private for the benefit of libkvm. */
struct	grf_softc *grf_softc;
int	numgrf = 0;

/*
 * Initialize a softc to sane defaults.
 */
void
grf_scinit(struct grf_softc *sc, const char *name, int unit)
{ 
	memset(sc, 0, sizeof(struct grf_softc));
	snprintf(sc->sc_xname, sizeof(sc->sc_xname), "%s%d", name, unit);
	sc->mfb_sc = NULL;
}

/*
 * (Re-)initialize the grf_softc block so that at least the requested
 * number of elements has been allocated.  If this results in more
 * elements than we had prior to getting here, we initialize each of
 * them to avoid problems down the road.
 */
void
grf_init(int n)
{
	struct grf_softc *sc;
	int i;

	if (n >= numgrf) {
		i = numgrf;
		numgrf = n + 1;

		if (grf_softc == NULL)
			sc = (struct grf_softc *)
			    malloc(numgrf * sizeof(*sc),
			    M_DEVBUF, M_WAITOK);
		else
			sc = (struct grf_softc *)
			    realloc(grf_softc, numgrf * sizeof(*sc),
			    M_DEVBUF, M_WAITOK);
		grf_softc = sc;

		/* Initialize per-softc structures. */
		while (i < numgrf) {
			grf_scinit(&grf_softc[i], "grf", i);
			i++;
		}
	}
}

/*
 * Called by main() during pseudo-device attachment.  If we had a
 * way to configure additional grf devices later, this would actually
 * allocate enough space for them.  As it stands, it's nonsensical,
 * so other than a basic sanity check we do nothing.
 */
void
grfattach(int n)
{
	if (n <= 0) {
#ifdef DIAGNOSTIC
		panic("grfattach: count <= 0");
#endif
		return;
	}

#if 0 /* XXX someday, if we implement a way to attach after autoconfig */
	grf_init(n);
#endif
}

/*
 * Called from macfb_attach() after setting up the frame buffer.  Since
 * there is a 1:1 correspondence between the macfb device and the grf
 * device, the only bit of information we really need is the macfb_softc.
 */
void
grf_attach(struct macfb_softc *sc, int unit)
{

	grf_init(unit);
	if (unit < numgrf)
		grf_softc[unit].mfb_sc = sc;
}

/*
 * Standard device ops
 */
int
grfopen(dev_t dev, int flag, int mode, struct lwp *l)
{
	struct grf_softc *sc;
	int unit = GRFUNIT(dev);
	int rv = 0;

	if (grf_softc == NULL || unit >= numgrf)
		return ENXIO;

	sc = &grf_softc[unit];
	if (sc->mfb_sc == NULL)
		rv = ENXIO;

	return rv;
}

int
grfclose(dev_t dev, int flag, int mode, struct lwp *l)
{
	struct grf_softc *sc;
	int unit = GRFUNIT(dev);
	int rv = 0;

	if (grf_softc == NULL || unit >= numgrf)
		return ENXIO;

	sc = &grf_softc[unit];
	if (sc->mfb_sc != NULL)
		macfb_clear(sc->mfb_sc->sc_dc);	/* clear the display */
	else
		rv = ENXIO;

	return rv;
}

int
grfioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
{
	struct grf_softc *sc;
	struct macfb_devconfig *dc;
#if defined(GRF_COMPAT) || (NGRF > 0)
	struct grfinfo *gd;
#endif /* GRF_COMPAT || (NGRF > 0) */
	struct grfmode *gm;
	int unit = GRFUNIT(dev);
	int rv;

	if (grf_softc == NULL || unit >= numgrf)
		return ENXIO;

	sc = &grf_softc[unit];
	if (sc->mfb_sc == NULL)
		return ENXIO;

	dc = sc->mfb_sc->sc_dc;

	switch (cmd) {
#if defined(GRF_COMPAT) || (NGRF > 0)
	case GRFIOCGINFO:
		gd = (struct grfinfo *)data;
		memset(gd, 0, sizeof(struct grfinfo));
		gd->gd_fbaddr     = (void *)dc->dc_paddr;
		gd->gd_fbsize     = dc->dc_size;
		gd->gd_colors     = (short)(1 << dc->dc_depth);
		gd->gd_planes     = (short)dc->dc_depth;
		gd->gd_fbwidth    = dc->dc_wid;
		gd->gd_fbheight   = dc->dc_ht;
		gd->gd_fbrowbytes = dc->dc_rowbytes;
		gd->gd_dwidth     = dc->dc_raster.width;
		gd->gd_dheight    = dc->dc_raster.height;
		rv = 0;
		break;
#endif /* GRF_COMPAT || (NGRF > 0) */

	case GRFIOCON:
	case GRFIOCOFF:
		/* Nothing to do */
		rv = 0;
		break;

#if defined(GRF_COMPAT) || (NGRF > 0)
	case GRFIOCMAP:
		rv = grfmap(dev, sc->mfb_sc, (void **)data, l->l_proc);
		break;

	case GRFIOCUNMAP:
		rv = grfunmap(dev, sc->mfb_sc, *(void **)data, l->l_proc);
		break;
#endif /* GRF_COMPAT || (NGRF > 0) */

	case GRFIOCGMODE:
		gm = (struct grfmode *)data;
		memset(gm, 0, sizeof(struct grfmode));
		gm->fbbase   = (char *)dc->dc_vaddr;
		gm->fbsize   = dc->dc_size;
		gm->fboff    = dc->dc_offset;
		gm->rowbytes = dc->dc_rowbytes;
		gm->width    = dc->dc_wid;
		gm->height   = dc->dc_ht;
		gm->psize    = dc->dc_depth;
		rv = 0;
		break;

	case GRFIOCLISTMODES:
	case GRFIOCGETMODE:
	case GRFIOCSETMODE:
		/* NONE of these operations are (officially) supported. */
	default:
		rv = EINVAL;
		break;
	}
	return rv;
}

paddr_t
grfmmap(dev_t dev, off_t off, int prot)
{
	struct grf_softc *sc;
	struct macfb_devconfig *dc;
	int unit = GRFUNIT(dev);

	if (grf_softc == NULL || unit >= numgrf)
		return ENXIO;

	sc = &grf_softc[unit];
	if (sc->mfb_sc == NULL)
		return ENXIO;

	dc = sc->mfb_sc->sc_dc;

	if ((u_int)off < m68k_round_page(dc->dc_offset + dc->dc_size))
		return m68k_btop(dc->dc_paddr + off);

	return (-1);
}

int
grfmap(dev_t dev, struct macfb_softc *sc, void **addrp, struct proc *p)
{
	size_t len;
	int error;

	len = m68k_round_page(sc->sc_dc->dc_offset + sc->sc_dc->dc_size);
	error = uvm_mmap_dev(p, addrp, len, dev, 0);

	/* Offset into page: */
	*addrp = (char *)*addrp + sc->sc_dc->dc_offset;

	return (error);
}

int
grfunmap(dev_t dev, struct macfb_softc *sc, void *addr, struct proc *p)
{
	size_t size;

	addr = (char *)addr - sc->sc_dc->dc_offset;

	if (addr <= 0)
		return (-1);

	size = m68k_round_page(sc->sc_dc->dc_offset + sc->sc_dc->dc_size);
	uvm_unmap(&p->p_vmspace->vm_map, (vaddr_t)addr, (vaddr_t)addr + size);
	return 0;
}