1 /* $NetBSD: ofb.c,v 1.73 2023/12/20 15:29:04 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1995, 1996 Carnegie-Mellon University.
5 * All rights reserved.
6 *
7 * Author: Chris G. Demetriou
8 *
9 * Permission to use, copy, modify and distribute this software and
10 * its documentation is hereby granted, provided that both the copyright
11 * notice and this permission notice appear in all copies of the
12 * software, derivative works or modified versions, and any portions
13 * thereof, and that both notices appear in supporting documentation.
14 *
15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 *
19 * Carnegie Mellon requests users of this software to return to
20 *
21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
22 * School of Computer Science
23 * Carnegie Mellon University
24 * Pittsburgh PA 15213-3890
25 *
26 * any improvements or extensions that they make and grant Carnegie the
27 * rights to redistribute these changes.
28 */
29
30 #include <sys/cdefs.h>
31 __KERNEL_RCSID(0, "$NetBSD: ofb.c,v 1.73 2023/12/20 15:29:04 thorpej Exp $");
32
33 #include <sys/param.h>
34 #include <sys/buf.h>
35 #include <sys/conf.h>
36 #include <sys/device.h>
37 #include <sys/ioctl.h>
38 #include <sys/kernel.h>
39 #include <sys/systm.h>
40 #include <sys/kauth.h>
41 #include <sys/lwp.h>
42
43 #include <dev/pci/pcidevs.h>
44 #include <dev/pci/pcireg.h>
45 #include <dev/pci/pcivar.h>
46 #include <dev/pci/pciio.h>
47
48 #include <dev/wscons/wsconsio.h>
49 #include <dev/wscons/wsdisplayvar.h>
50 #include <dev/rasops/rasops.h>
51 #include <dev/wsfont/wsfont.h>
52
53 #include <dev/ofw/openfirm.h>
54 #include <dev/ofw/ofw_pci.h>
55
56 #include <sys/bus.h>
57 #include <machine/autoconf.h>
58 #include <machine/grfioctl.h>
59
60 #include <dev/wscons/wsdisplay_vconsvar.h>
61
62 #include <powerpc/oea/ofw_rasconsvar.h>
63
64 struct ofb_softc {
65 device_t sc_dev;
66
67 pci_chipset_tag_t sc_pc;
68 pcitag_t sc_pcitag;
69 bus_space_tag_t sc_memt;
70 bus_space_tag_t sc_iot;
71
72 u_int32_t sc_addrs[30]; /* "assigned-addresses" storage */
73 u_char sc_cmap_red[256];
74 u_char sc_cmap_green[256];
75 u_char sc_cmap_blue[256];
76
77 int sc_node, sc_ih, sc_mode;
78 paddr_t sc_fbaddr;
79 uint32_t sc_fbsize;
80
81 struct vcons_data vd;
82 };
83
84 static int ofbmatch(device_t, cfdata_t, void *);
85 static void ofbattach(device_t, device_t, void *);
86
87 CFATTACH_DECL_NEW(ofb, sizeof(struct ofb_softc),
88 ofbmatch, ofbattach, NULL, NULL);
89
90 const struct wsscreen_descr *_ofb_scrlist[] = {
91 &rascons_stdscreen,
92 /* XXX other formats, graphics screen? */
93 };
94
95 struct wsscreen_list ofb_screenlist = {
96 sizeof(_ofb_scrlist) / sizeof(struct wsscreen_descr *), _ofb_scrlist
97 };
98
99 static int ofb_ioctl(void *, void *, u_long, void *, int, struct lwp *);
100 static paddr_t ofb_mmap(void *, void *, off_t, int);
101
102 static void ofb_init_screen(void *, struct vcons_screen *, int, long *);
103
104 struct wsdisplay_accessops ofb_accessops = {
105 ofb_ioctl,
106 ofb_mmap,
107 NULL, /* vcons_alloc_screen */
108 NULL, /* vcons_free_screen */
109 NULL, /* vcons_show_screen */
110 NULL /* load_font */
111 };
112
113 static void ofb_putpalreg(struct ofb_softc *, int, uint8_t, uint8_t,
114 uint8_t);
115
116 static int ofb_getcmap(struct ofb_softc *, struct wsdisplay_cmap *);
117 static int ofb_putcmap(struct ofb_softc *, struct wsdisplay_cmap *);
118 static void ofb_init_cmap(struct ofb_softc *);
119 static int ofb_drm_print(void *, const char *);
120
121 extern const u_char rasops_cmap[768];
122
123 extern int console_node;
124 extern int console_instance;
125
126 static int
ofbmatch(device_t parent,cfdata_t match,void * aux)127 ofbmatch(device_t parent, cfdata_t match, void *aux)
128 {
129 struct pci_attach_args *pa = aux;
130
131 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_APPLE &&
132 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_APPLE_CONTROL)
133 return 1;
134
135 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY)
136 return 1;
137
138 return 0;
139 }
140
141 static void
ofbattach(device_t parent,device_t self,void * aux)142 ofbattach(device_t parent, device_t self, void *aux)
143 {
144 struct ofb_softc *sc = device_private(self);
145 struct pci_attach_args *pa = aux;
146 struct wsemuldisplaydev_attach_args a;
147 struct rasops_info *ri = &rascons_console_screen.scr_ri;
148 long defattr;
149 int console, node, sub;
150 char devinfo[256];
151
152 sc->sc_dev = self;
153
154 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
155 printf(": %s\n", devinfo);
156
157 if (console_node == 0)
158 return;
159
160 node = pcidev_to_ofdev(pa->pa_pc, pa->pa_tag);
161 console = (node == console_node);
162 if (!console) {
163 /* check if any of the childs matches */
164 sub = OF_child(node);
165 while ((sub != 0) && (sub != console_node)) {
166 sub = OF_peer(sub);
167 }
168 if (sub == console_node) {
169 console = true;
170 }
171 }
172
173 sc->sc_memt = pa->pa_memt;
174 sc->sc_iot = pa->pa_iot;
175 sc->sc_pc = pa->pa_pc;
176 sc->sc_pcitag = pa->pa_tag;
177 sc->sc_mode = WSDISPLAYIO_MODE_EMUL;
178
179 if (!console)
180 return;
181
182 vcons_init(&sc->vd, sc, &rascons_stdscreen, &ofb_accessops);
183 sc->vd.init_screen = ofb_init_screen;
184
185 sc->sc_node = console_node;
186
187 sc->sc_ih = console_instance;
188 vcons_init_screen(&sc->vd, &rascons_console_screen, 1, &defattr);
189 rascons_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC;
190
191 printf("%s: %d x %d, %dbpp\n", device_xname(self),
192 ri->ri_width, ri->ri_height, ri->ri_depth);
193
194 sc->sc_fbaddr = 0;
195 if (OF_getprop(sc->sc_node, "address", &sc->sc_fbaddr, 4) != 4)
196 OF_interpret("frame-buffer-adr", 0, 1, &sc->sc_fbaddr);
197 if (sc->sc_fbaddr == 0) {
198 printf("%s: Unable to find the framebuffer address.\n",
199 device_xname(sc->sc_dev));
200 return;
201 }
202 sc->sc_fbsize = round_page(ri->ri_stride * ri->ri_height);
203
204 /* XXX */
205 if (OF_getprop(sc->sc_node, "assigned-addresses", sc->sc_addrs,
206 sizeof(sc->sc_addrs)) == -1) {
207 sc->sc_node = OF_parent(sc->sc_node);
208 OF_getprop(sc->sc_node, "assigned-addresses", sc->sc_addrs,
209 sizeof(sc->sc_addrs));
210 }
211
212 ofb_init_cmap(sc);
213
214 a.console = console;
215 a.scrdata = &ofb_screenlist;
216 a.accessops = &ofb_accessops;
217 a.accesscookie = &sc->vd;
218
219 config_found(self, &a, wsemuldisplaydevprint,
220 CFARGS(.iattr = "wsemuldisplaydev"));
221
222 config_found(self, aux, ofb_drm_print,
223 CFARGS(.iattr = "drm"));
224 }
225
226 static int
ofb_drm_print(void * aux,const char * pnp)227 ofb_drm_print(void *aux, const char *pnp)
228 {
229 if (pnp)
230 aprint_normal("direct rendering for %s", pnp);
231 return (UNSUPP);
232 }
233
234 static void
ofb_init_screen(void * cookie,struct vcons_screen * scr,int existing,long * defattr)235 ofb_init_screen(void *cookie, struct vcons_screen *scr,
236 int existing, long *defattr)
237 {
238 struct ofb_softc *sc = cookie;
239 struct rasops_info *ri = &scr->scr_ri;
240
241 if (scr != &rascons_console_screen) {
242 rascons_init_rasops(sc->sc_node, ri);
243 }
244 }
245
246 static int
ofb_ioctl(void * v,void * vs,u_long cmd,void * data,int flag,struct lwp * l)247 ofb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, struct lwp *l)
248 {
249 struct vcons_data *vd = v;
250 struct ofb_softc *sc = vd->cookie;
251 struct wsdisplay_fbinfo *wdf;
252 struct vcons_screen *ms = vd->active;
253 struct grfinfo *gm;
254
255 switch (cmd) {
256 case WSDISPLAYIO_GTYPE:
257 *(u_int *)data = WSDISPLAY_TYPE_PCIMISC; /* XXX ? */
258 return 0;
259
260 case WSDISPLAYIO_GINFO:
261 /* we won't get here without any screen anyway */
262 if (ms != NULL) {
263 wdf = (void *)data;
264 wdf->height = ms->scr_ri.ri_height;
265 wdf->width = ms->scr_ri.ri_width;
266 wdf->depth = ms->scr_ri.ri_depth;
267 wdf->cmsize = 256;
268 return 0;
269 } else
270 return ENODEV;
271
272 case WSDISPLAYIO_GETCMAP:
273 return ofb_getcmap(sc, (struct wsdisplay_cmap *)data);
274
275 case WSDISPLAYIO_PUTCMAP:
276 return ofb_putcmap(sc, (struct wsdisplay_cmap *)data);
277
278 /* XXX There are no way to know framebuffer pa from a user program. */
279 case GRFIOCGINFO:
280 if (ms != NULL) {
281 gm = (void *)data;
282 memset(gm, 0, sizeof(struct grfinfo));
283 gm->gd_fbaddr = (void *)sc->sc_fbaddr;
284 gm->gd_fbrowbytes = ms->scr_ri.ri_stride;
285 return 0;
286 } else
287 return ENODEV;
288 case WSDISPLAYIO_LINEBYTES:
289 {
290 *(int *)data = ms->scr_ri.ri_stride;
291 return 0;
292 }
293 case WSDISPLAYIO_SMODE:
294 {
295 int new_mode = *(int*)data;
296 if (new_mode != sc->sc_mode)
297 {
298 sc->sc_mode = new_mode;
299 if (new_mode == WSDISPLAYIO_MODE_EMUL)
300 {
301 ofb_init_cmap(sc);
302 vcons_redraw_screen(ms);
303 }
304 }
305 }
306 return 0;
307 /* PCI config read/write passthrough. */
308 case PCI_IOC_CFGREAD:
309 case PCI_IOC_CFGWRITE:
310 return (pci_devioctl(sc->sc_pc, sc->sc_pcitag,
311 cmd, data, flag, l));
312 }
313 return EPASSTHROUGH;
314 }
315
316 static paddr_t
ofb_mmap(void * v,void * vs,off_t offset,int prot)317 ofb_mmap(void *v, void *vs, off_t offset, int prot)
318 {
319 struct vcons_data *vd = v;
320 struct ofb_softc *sc = vd->cookie;
321 u_int32_t *ap = sc->sc_addrs;
322 int i;
323
324 if (vd->active == NULL) {
325 printf("%s: no active screen.\n", device_xname(sc->sc_dev));
326 return -1;
327 }
328
329 /* framebuffer at offset 0 */
330 if ((offset >= 0) && (offset < sc->sc_fbsize))
331 return bus_space_mmap(sc->sc_memt, sc->sc_fbaddr, offset, prot,
332 BUS_SPACE_MAP_LINEAR);
333
334 /*
335 * restrict all other mappings to processes with superuser privileges
336 * or the kernel itself
337 */
338 if (kauth_authorize_machdep(kauth_cred_get(), KAUTH_MACHDEP_UNMANAGEDMEM,
339 NULL, NULL, NULL, NULL) != 0) {
340 printf("%s: mmap() rejected.\n", device_xname(sc->sc_dev));
341 return -1;
342 }
343
344 /* let them mmap() 0xa0000 - 0xbffff if it's not covered above */
345 #ifdef OFB_FAKE_VGA_FB
346 if (offset >=0xa0000 && offset < 0xbffff)
347 return sc->sc_fbaddr + offset - 0xa0000;
348 #endif
349
350 /* allow to map our IO space */
351 if ((offset >= 0xf2000000) && (offset < 0xf2800000)) {
352 return bus_space_mmap(sc->sc_iot, offset-0xf2000000, 0, prot,
353 BUS_SPACE_MAP_LINEAR);
354 }
355
356 for (i = 0; i < 6; i++) {
357 switch (ap[0] & OFW_PCI_PHYS_HI_SPACEMASK) {
358 case OFW_PCI_PHYS_HI_SPACE_MEM32:
359 if (offset >= ap[2] && offset < ap[2] + ap[4])
360 return bus_space_mmap(sc->sc_memt, offset, 0,
361 prot, BUS_SPACE_MAP_LINEAR);
362 }
363 ap += 5;
364 }
365 return -1;
366 }
367
368 static int
ofb_getcmap(struct ofb_softc * sc,struct wsdisplay_cmap * cm)369 ofb_getcmap(struct ofb_softc *sc, struct wsdisplay_cmap *cm)
370 {
371 u_int index = cm->index;
372 u_int count = cm->count;
373 int error;
374
375 if (index >= 256 || count > 256 || index + count > 256)
376 return EINVAL;
377
378 error = copyout(&sc->sc_cmap_red[index], cm->red, count);
379 if (error)
380 return error;
381 error = copyout(&sc->sc_cmap_green[index], cm->green, count);
382 if (error)
383 return error;
384 error = copyout(&sc->sc_cmap_blue[index], cm->blue, count);
385 if (error)
386 return error;
387
388 return 0;
389 }
390
391 int
ofb_putcmap(struct ofb_softc * sc,struct wsdisplay_cmap * cm)392 ofb_putcmap(struct ofb_softc *sc, struct wsdisplay_cmap *cm)
393 {
394 u_int index = cm->index;
395 u_int count = cm->count;
396 int i, error;
397 u_char rbuf[256], gbuf[256], bbuf[256];
398 u_char *r, *g, *b;
399
400 if (cm->index >= 256 || cm->count > 256 ||
401 (cm->index + cm->count) > 256)
402 return EINVAL;
403 error = copyin(cm->red, &rbuf[index], count);
404 if (error)
405 return error;
406 error = copyin(cm->green, &gbuf[index], count);
407 if (error)
408 return error;
409 error = copyin(cm->blue, &bbuf[index], count);
410 if (error)
411 return error;
412
413 memcpy(&sc->sc_cmap_red[index], &rbuf[index], count);
414 memcpy(&sc->sc_cmap_green[index], &gbuf[index], count);
415 memcpy(&sc->sc_cmap_blue[index], &bbuf[index], count);
416
417 r = &sc->sc_cmap_red[index];
418 g = &sc->sc_cmap_green[index];
419 b = &sc->sc_cmap_blue[index];
420 for (i = 0; i < count; i++) {
421 OF_call_method_1("color!", sc->sc_ih, 4, *r, *g, *b, index);
422 r++, g++, b++, index++;
423 }
424 return 0;
425 }
426
427 static void
ofb_putpalreg(struct ofb_softc * sc,int idx,uint8_t r,uint8_t g,uint8_t b)428 ofb_putpalreg(struct ofb_softc *sc, int idx, uint8_t r, uint8_t g, uint8_t b)
429 {
430 if ((idx<0) || (idx > 255))
431 return;
432 if (sc != NULL) {
433 OF_call_method_1("color!", sc->sc_ih, 4, r, g, b, idx);
434 sc->sc_cmap_red[idx] = r;
435 sc->sc_cmap_green[idx] = g;
436 sc->sc_cmap_blue[idx] = b;
437 } else {
438 OF_call_method_1("color!", console_instance, 4, r, g, b, idx);
439 }
440 }
441
442 static void
ofb_init_cmap(struct ofb_softc * sc)443 ofb_init_cmap(struct ofb_softc *sc)
444 {
445 int i;
446
447 /* mess with the palette only when we're running in 8 bit */
448 if (rascons_console_screen.scr_ri.ri_depth == 8) {
449 for (i = 0; i < 256; i++) {
450 ofb_putpalreg(sc, i, rasops_cmap[(i * 3) + 0],
451 rasops_cmap[(i * 3) + 1],
452 rasops_cmap[(i * 3) + 2]);
453 }
454 }
455 }
456