1 /* $NetBSD: cgtwo.c,v 1.58 2023/12/20 05:33:18 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
10 *
11 * All advertising materials mentioning features or use of this software
12 * must display the following acknowledgement:
13 * This product includes software developed by the University of
14 * California, Lawrence Berkeley Laboratory.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * from: @(#)cgthree.c 8.2 (Berkeley) 10/30/93
41 */
42
43 /*
44 * color display (cgtwo) driver.
45 *
46 * Does not handle interrupts, even though they can occur.
47 *
48 * XXX should defer colormap updates to vertical retrace interrupts
49 */
50
51 #include <sys/cdefs.h>
52 __KERNEL_RCSID(0, "$NetBSD: cgtwo.c,v 1.58 2023/12/20 05:33:18 thorpej Exp $");
53
54 #include <sys/param.h>
55 #include <sys/systm.h>
56 #include <sys/buf.h>
57 #include <sys/device.h>
58 #include <sys/ioctl.h>
59 #include <sys/mman.h>
60 #include <sys/tty.h>
61 #include <sys/conf.h>
62
63 #include <uvm/uvm_extern.h>
64
65 #include <machine/autoconf.h>
66
67 #include <dev/sun/fbio.h>
68 #include <dev/sun/fbvar.h>
69
70 #include <dev/vme/vmevar.h>
71
72 #include <machine/eeprom.h>
73 #include <machine/cgtworeg.h>
74
75
76 /* per-display variables */
77 struct cgtwo_softc {
78 struct fbdevice sc_fb; /* frame buffer device */
79 vme_addr_t sc_paddr;
80 vme_chipset_tag_t sc_ct;
81 bus_space_tag_t sc_bt;
82 volatile struct cg2statusreg *sc_reg; /* CG2 control registers */
83 volatile u_short *sc_cmap;
84 #define sc_redmap(sc) ((sc)->sc_cmap)
85 #define sc_greenmap(sc) ((sc)->sc_cmap + CG2_CMSIZE)
86 #define sc_bluemap(sc) ((sc)->sc_cmap + 2 * CG2_CMSIZE)
87 };
88
89 /* autoconfiguration driver */
90 static int cgtwomatch(device_t, cfdata_t, void *);
91 static void cgtwoattach(device_t, device_t, void *);
92 static void cgtwounblank(device_t);
93 int cgtwogetcmap(struct cgtwo_softc *, struct fbcmap *);
94 int cgtwoputcmap(struct cgtwo_softc *, struct fbcmap *);
95
96 CFATTACH_DECL_NEW(cgtwo, sizeof(struct cgtwo_softc),
97 cgtwomatch, cgtwoattach, NULL, NULL);
98
99 extern struct cfdriver cgtwo_cd;
100
101 dev_type_open(cgtwoopen);
102 dev_type_ioctl(cgtwoioctl);
103 dev_type_mmap(cgtwommap);
104
105 const struct cdevsw cgtwo_cdevsw = {
106 .d_open = cgtwoopen,
107 .d_close = nullclose,
108 .d_read = noread,
109 .d_write = nowrite,
110 .d_ioctl = cgtwoioctl,
111 .d_stop = nostop,
112 .d_tty = notty,
113 .d_poll = nopoll,
114 .d_mmap = cgtwommap,
115 .d_kqfilter = nokqfilter,
116 .d_discard = nodiscard,
117 .d_flag = 0
118 };
119
120 /* frame buffer generic driver */
121 static struct fbdriver cgtwofbdriver = {
122 cgtwounblank, cgtwoopen, nullclose, cgtwoioctl, nopoll, cgtwommap,
123 nokqfilter
124 };
125
126 /*
127 * Match a cgtwo.
128 */
129 static int
cgtwomatch(device_t parent,cfdata_t cf,void * aux)130 cgtwomatch(device_t parent, cfdata_t cf, void *aux)
131 {
132 struct vme_attach_args *va = aux;
133 vme_chipset_tag_t ct = va->va_vct;
134 vme_am_t mod;
135
136 /*
137 * Mask out invalid flags from the user.
138 */
139 cf->cf_flags &= FB_USERMASK;
140
141 mod = 0x3d; /* VME_AM_A24 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA */
142 if (vme_probe(ct, va->r[0].offset + CG2_CTLREG_OFF, 2, mod, VME_D16,
143 0, 0)) {
144 return (0);
145 }
146
147 return (1);
148 }
149
150 /*
151 * Attach a display. We need to notice if it is the console, too.
152 */
153 static void
cgtwoattach(device_t parent,device_t self,void * aux)154 cgtwoattach(device_t parent, device_t self, void *aux)
155 {
156 struct vme_attach_args *va = aux;
157 vme_chipset_tag_t ct = va->va_vct;
158 bus_space_tag_t bt;
159 bus_space_handle_t bh;
160 vme_am_t mod;
161 vme_mapresc_t resc;
162 struct cgtwo_softc *sc = device_private(self);
163 struct fbdevice *fb = &sc->sc_fb;
164 struct eeprom *eep = (struct eeprom *)eeprom_va;
165 int isconsole = 0;
166
167 sc->sc_ct = ct;
168 fb->fb_driver = &cgtwofbdriver;
169 fb->fb_device = self;
170 fb->fb_type.fb_type = FBTYPE_SUN2COLOR;
171 fb->fb_flags = device_cfdata(self)->cf_flags;
172
173 fb->fb_type.fb_depth = 8;
174 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900);
175
176 fb->fb_type.fb_cmsize = 256;
177 fb->fb_type.fb_size = roundup(CG2_MAPPED_SIZE, PAGE_SIZE);
178 printf(": cgtwo, %d x %d",
179 fb->fb_type.fb_width, fb->fb_type.fb_height);
180
181 /*
182 * When the ROM has mapped in a cgtwo display, the address
183 * maps only the video RAM, so in any case we have to map the
184 * registers ourselves. We only need the video RAM if we are
185 * going to print characters via rconsole.
186 */
187 sc->sc_paddr = va->r[0].offset;
188 mod = 0x3d; /* VME_AM_A24 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA */
189
190 if (vme_space_map(ct, sc->sc_paddr + CG2_ROPMEM_OFF +
191 offsetof(struct cg2fb, status.reg),
192 sizeof(struct cg2statusreg), mod, VME_D16, 0,
193 &bt, &bh, &resc) != 0)
194 panic("cgtwo: vme_map status");
195 sc->sc_bt = bt;
196 sc->sc_reg = (volatile struct cg2statusreg *)bh; /* XXX */
197
198 if (vme_space_map(ct, sc->sc_paddr + CG2_ROPMEM_OFF +
199 offsetof(struct cg2fb, redmap[0]),
200 3 * CG2_CMSIZE, mod, VME_D16, 0,
201 &bt, &bh, &resc) != 0)
202 panic("cgtwo: vme_map cmap");
203 sc->sc_cmap = (volatile u_short *)bh; /* XXX */
204
205 /*
206 * Assume this is the console if there's no eeprom info
207 * to be found.
208 */
209 if (eep == NULL || eep->eeConsole == EE_CONS_COLOR)
210 isconsole = fb_is_console(0);
211 else
212 isconsole = 0;
213
214 if (isconsole) {
215 if (vme_space_map(ct, sc->sc_paddr + CG2_PIXMAP_OFF,
216 CG2_PIXMAP_SIZE, mod, VME_D16, 0,
217 &bt, &bh, &resc) != 0)
218 panic("cgtwo: vme_map pixels");
219
220 fb->fb_pixels = (void *)bh; /* XXX */
221 printf(" (console)\n");
222 #ifdef RASTERCONSOLE
223 fbrcons_init(fb);
224 #endif
225 } else
226 printf("\n");
227
228 fb_attach(fb, isconsole);
229 }
230
231 int
cgtwoopen(dev_t dev,int flags,int mode,struct lwp * l)232 cgtwoopen(dev_t dev, int flags, int mode, struct lwp *l)
233 {
234 int unit = minor(dev);
235
236 if (device_lookup(&cgtwo_cd, unit) == NULL)
237 return (ENXIO);
238 return (0);
239 }
240
241 int
cgtwoioctl(dev_t dev,u_long cmd,void * data,int flags,struct lwp * l)242 cgtwoioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l)
243 {
244 register struct cgtwo_softc *sc = device_lookup_private(&cgtwo_cd,
245 minor(dev));
246 register struct fbgattr *fba;
247
248 switch (cmd) {
249
250 case FBIOGTYPE:
251 *(struct fbtype *)data = sc->sc_fb.fb_type;
252 break;
253
254 case FBIOGATTR:
255 fba = (struct fbgattr *)data;
256 fba->real_type = sc->sc_fb.fb_type.fb_type;
257 fba->owner = 0; /* XXX ??? */
258 fba->fbtype = sc->sc_fb.fb_type;
259 fba->sattr.flags = 0;
260 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type;
261 fba->sattr.dev_specific[0] = -1;
262 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type;
263 fba->emu_types[1] = -1;
264 break;
265
266 case FBIOGETCMAP:
267 return cgtwogetcmap(sc, (struct fbcmap *) data);
268
269 case FBIOPUTCMAP:
270 return cgtwoputcmap(sc, (struct fbcmap *) data);
271
272 case FBIOGVIDEO:
273 *(int *)data = sc->sc_reg->video_enab;
274 break;
275
276 case FBIOSVIDEO:
277 sc->sc_reg->video_enab = (*(int*)data) & 1;
278 break;
279
280 default:
281 return (ENOTTY);
282 }
283 return (0);
284 }
285
286 /*
287 * Undo the effect of an FBIOSVIDEO that turns the video off.
288 */
289 static void
cgtwounblank(device_t dev)290 cgtwounblank(device_t dev)
291 {
292 struct cgtwo_softc *sc = device_private(dev);
293 sc->sc_reg->video_enab = 1;
294 }
295
296 /*
297 */
298 int
cgtwogetcmap(struct cgtwo_softc * sc,struct fbcmap * cmap)299 cgtwogetcmap(struct cgtwo_softc *sc, struct fbcmap *cmap)
300 {
301 u_char red[CG2_CMSIZE], green[CG2_CMSIZE], blue[CG2_CMSIZE];
302 int error, start, count, ecount;
303 register u_int i;
304 register volatile u_short *p;
305
306 start = cmap->index;
307 count = cmap->count;
308 ecount = start + count;
309 if (start >= CG2_CMSIZE || count > CG2_CMSIZE - start)
310 return (EINVAL);
311
312 /* XXX - Wait for retrace? */
313
314 /* Copy hardware to local arrays. */
315 p = &sc_redmap(sc)[start];
316 for (i = start; i < ecount; i++)
317 red[i] = *p++;
318 p = &sc_greenmap(sc)[start];
319 for (i = start; i < ecount; i++)
320 green[i] = *p++;
321 p = &sc_bluemap(sc)[start];
322 for (i = start; i < ecount; i++)
323 blue[i] = *p++;
324
325 /* Copy local arrays to user space. */
326 if ((error = copyout(red + start, cmap->red, count)) != 0)
327 return (error);
328 if ((error = copyout(green + start, cmap->green, count)) != 0)
329 return (error);
330 if ((error = copyout(blue + start, cmap->blue, count)) != 0)
331 return (error);
332
333 return (0);
334 }
335
336 /*
337 */
338 int
cgtwoputcmap(struct cgtwo_softc * sc,struct fbcmap * cmap)339 cgtwoputcmap(struct cgtwo_softc *sc, struct fbcmap *cmap)
340 {
341 u_char red[CG2_CMSIZE], green[CG2_CMSIZE], blue[CG2_CMSIZE];
342 int error;
343 u_int start, count, ecount;
344 register u_int i;
345 register volatile u_short *p;
346
347 start = cmap->index;
348 count = cmap->count;
349 ecount = start + count;
350 if (start >= CG2_CMSIZE || count > CG2_CMSIZE - start)
351 return (EINVAL);
352
353 /* Copy from user space to local arrays. */
354 if ((error = copyin(cmap->red, red + start, count)) != 0)
355 return (error);
356 if ((error = copyin(cmap->green, green + start, count)) != 0)
357 return (error);
358 if ((error = copyin(cmap->blue, blue + start, count)) != 0)
359 return (error);
360
361 /* XXX - Wait for retrace? */
362
363 /* Copy from local arrays to hardware. */
364 p = &sc_redmap(sc)[start];
365 for (i = start; i < ecount; i++)
366 *p++ = red[i];
367 p = &sc_greenmap(sc)[start];
368 for (i = start; i < ecount; i++)
369 *p++ = green[i];
370 p = &sc_bluemap(sc)[start];
371 for (i = start; i < ecount; i++)
372 *p++ = blue[i];
373
374 return (0);
375 }
376
377 /*
378 * Return the address that would map the given device at the given
379 * offset, allowing for the given protection, or return -1 for error.
380 */
381 paddr_t
cgtwommap(dev_t dev,off_t off,int prot)382 cgtwommap(dev_t dev, off_t off, int prot)
383 {
384 extern int sparc_vme_mmap_cookie(vme_addr_t, vme_am_t,
385 bus_space_handle_t *);
386
387 register struct cgtwo_softc *sc = device_lookup_private(&cgtwo_cd,
388 minor(dev));
389 vme_am_t mod;
390 bus_space_handle_t bh;
391
392 if (off & PGOFSET)
393 panic("cgtwommap");
394
395 if (off >= sc->sc_fb.fb_type.fb_size)
396 return (-1);
397
398 /* Apparently, the pixels are in 32-bit data space */
399 mod = 0x3d; /* VME_AM_A24 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA */
400
401 if (sparc_vme_mmap_cookie(sc->sc_paddr + off, mod, &bh) != 0)
402 panic("cgtwommap");
403
404 return ((paddr_t)bh);
405 }
406