1 /* $NetBSD: ofb.c,v 1.72 2021/08/07 16:18:57 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 1.72 2021/08/07 16:18:57 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/malloc.h>
40 #include <sys/systm.h>
41 #include <sys/kauth.h>
42 #include <sys/lwp.h>
43
44 #include <dev/pci/pcidevs.h>
45 #include <dev/pci/pcireg.h>
46 #include <dev/pci/pcivar.h>
47 #include <dev/pci/pciio.h>
48
49 #include <dev/wscons/wsconsio.h>
50 #include <dev/wscons/wsdisplayvar.h>
51 #include <dev/rasops/rasops.h>
52 #include <dev/wsfont/wsfont.h>
53
54 #include <dev/ofw/openfirm.h>
55 #include <dev/ofw/ofw_pci.h>
56
57 #include <sys/bus.h>
58 #include <machine/autoconf.h>
59 #include <machine/grfioctl.h>
60
61 #include <dev/wscons/wsdisplay_vconsvar.h>
62
63 #include <powerpc/oea/ofw_rasconsvar.h>
64
65 struct ofb_softc {
66 device_t sc_dev;
67
68 pci_chipset_tag_t sc_pc;
69 pcitag_t sc_pcitag;
70 bus_space_tag_t sc_memt;
71 bus_space_tag_t sc_iot;
72
73 u_int32_t sc_addrs[30]; /* "assigned-addresses" storage */
74 u_char sc_cmap_red[256];
75 u_char sc_cmap_green[256];
76 u_char sc_cmap_blue[256];
77
78 int sc_node, sc_ih, sc_mode;
79 paddr_t sc_fbaddr;
80 uint32_t sc_fbsize;
81
82 struct vcons_data vd;
83 };
84
85 static int ofbmatch(device_t, cfdata_t, void *);
86 static void ofbattach(device_t, device_t, void *);
87
88 CFATTACH_DECL_NEW(ofb, sizeof(struct ofb_softc),
89 ofbmatch, ofbattach, NULL, NULL);
90
91 const struct wsscreen_descr *_ofb_scrlist[] = {
92 &rascons_stdscreen,
93 /* XXX other formats, graphics screen? */
94 };
95
96 struct wsscreen_list ofb_screenlist = {
97 sizeof(_ofb_scrlist) / sizeof(struct wsscreen_descr *), _ofb_scrlist
98 };
99
100 static int ofb_ioctl(void *, void *, u_long, void *, int, struct lwp *);
101 static paddr_t ofb_mmap(void *, void *, off_t, int);
102
103 static void ofb_init_screen(void *, struct vcons_screen *, int, long *);
104
105 struct wsdisplay_accessops ofb_accessops = {
106 ofb_ioctl,
107 ofb_mmap,
108 NULL, /* vcons_alloc_screen */
109 NULL, /* vcons_free_screen */
110 NULL, /* vcons_show_screen */
111 NULL /* load_font */
112 };
113
114 static void ofb_putpalreg(struct ofb_softc *, int, uint8_t, uint8_t,
115 uint8_t);
116
117 static int ofb_getcmap(struct ofb_softc *, struct wsdisplay_cmap *);
118 static int ofb_putcmap(struct ofb_softc *, struct wsdisplay_cmap *);
119 static void ofb_init_cmap(struct ofb_softc *);
120 static int ofb_drm_print(void *, const char *);
121
122 extern const u_char rasops_cmap[768];
123
124 extern int console_node;
125 extern int console_instance;
126
127 static int
ofbmatch(device_t parent,cfdata_t match,void * aux)128 ofbmatch(device_t parent, cfdata_t match, void *aux)
129 {
130 struct pci_attach_args *pa = aux;
131
132 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_APPLE &&
133 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_APPLE_CONTROL)
134 return 1;
135
136 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY)
137 return 1;
138
139 return 0;
140 }
141
142 static void
ofbattach(device_t parent,device_t self,void * aux)143 ofbattach(device_t parent, device_t self, void *aux)
144 {
145 struct ofb_softc *sc = device_private(self);
146 struct pci_attach_args *pa = aux;
147 struct wsemuldisplaydev_attach_args a;
148 struct rasops_info *ri = &rascons_console_screen.scr_ri;
149 long defattr;
150 int console, node, sub;
151 char devinfo[256];
152
153 sc->sc_dev = self;
154
155 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
156 printf(": %s\n", devinfo);
157
158 if (console_node == 0)
159 return;
160
161 node = pcidev_to_ofdev(pa->pa_pc, pa->pa_tag);
162 console = (node == console_node);
163 if (!console) {
164 /* check if any of the childs matches */
165 sub = OF_child(node);
166 while ((sub != 0) && (sub != console_node)) {
167 sub = OF_peer(sub);
168 }
169 if (sub == console_node) {
170 console = true;
171 }
172 }
173
174 sc->sc_memt = pa->pa_memt;
175 sc->sc_iot = pa->pa_iot;
176 sc->sc_pc = pa->pa_pc;
177 sc->sc_pcitag = pa->pa_tag;
178 sc->sc_mode = WSDISPLAYIO_MODE_EMUL;
179
180 if (!console)
181 return;
182
183 vcons_init(&sc->vd, sc, &rascons_stdscreen, &ofb_accessops);
184 sc->vd.init_screen = ofb_init_screen;
185
186 sc->sc_node = console_node;
187
188 sc->sc_ih = console_instance;
189 vcons_init_screen(&sc->vd, &rascons_console_screen, 1, &defattr);
190 rascons_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC;
191
192 printf("%s: %d x %d, %dbpp\n", device_xname(self),
193 ri->ri_width, ri->ri_height, ri->ri_depth);
194
195 sc->sc_fbaddr = 0;
196 if (OF_getprop(sc->sc_node, "address", &sc->sc_fbaddr, 4) != 4)
197 OF_interpret("frame-buffer-adr", 0, 1, &sc->sc_fbaddr);
198 if (sc->sc_fbaddr == 0) {
199 printf("%s: Unable to find the framebuffer address.\n",
200 device_xname(sc->sc_dev));
201 return;
202 }
203 sc->sc_fbsize = round_page(ri->ri_stride * ri->ri_height);
204
205 /* XXX */
206 if (OF_getprop(sc->sc_node, "assigned-addresses", sc->sc_addrs,
207 sizeof(sc->sc_addrs)) == -1) {
208 sc->sc_node = OF_parent(sc->sc_node);
209 OF_getprop(sc->sc_node, "assigned-addresses", sc->sc_addrs,
210 sizeof(sc->sc_addrs));
211 }
212
213 ofb_init_cmap(sc);
214
215 a.console = console;
216 a.scrdata = &ofb_screenlist;
217 a.accessops = &ofb_accessops;
218 a.accesscookie = &sc->vd;
219
220 config_found(self, &a, wsemuldisplaydevprint,
221 CFARGS(.iattr = "wsemuldisplaydev"));
222
223 config_found(self, aux, ofb_drm_print,
224 CFARGS(.iattr = "drm"));
225 }
226
227 static int
ofb_drm_print(void * aux,const char * pnp)228 ofb_drm_print(void *aux, const char *pnp)
229 {
230 if (pnp)
231 aprint_normal("direct rendering for %s", pnp);
232 return (UNSUPP);
233 }
234
235 static void
ofb_init_screen(void * cookie,struct vcons_screen * scr,int existing,long * defattr)236 ofb_init_screen(void *cookie, struct vcons_screen *scr,
237 int existing, long *defattr)
238 {
239 struct ofb_softc *sc = cookie;
240 struct rasops_info *ri = &scr->scr_ri;
241
242 if (scr != &rascons_console_screen) {
243 rascons_init_rasops(sc->sc_node, ri);
244 }
245 }
246
247 static int
ofb_ioctl(void * v,void * vs,u_long cmd,void * data,int flag,struct lwp * l)248 ofb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, struct lwp *l)
249 {
250 struct vcons_data *vd = v;
251 struct ofb_softc *sc = vd->cookie;
252 struct wsdisplay_fbinfo *wdf;
253 struct vcons_screen *ms = vd->active;
254 struct grfinfo *gm;
255
256 switch (cmd) {
257 case WSDISPLAYIO_GTYPE:
258 *(u_int *)data = WSDISPLAY_TYPE_PCIMISC; /* XXX ? */
259 return 0;
260
261 case WSDISPLAYIO_GINFO:
262 /* we won't get here without any screen anyway */
263 if (ms != NULL) {
264 wdf = (void *)data;
265 wdf->height = ms->scr_ri.ri_height;
266 wdf->width = ms->scr_ri.ri_width;
267 wdf->depth = ms->scr_ri.ri_depth;
268 wdf->cmsize = 256;
269 return 0;
270 } else
271 return ENODEV;
272
273 case WSDISPLAYIO_GETCMAP:
274 return ofb_getcmap(sc, (struct wsdisplay_cmap *)data);
275
276 case WSDISPLAYIO_PUTCMAP:
277 return ofb_putcmap(sc, (struct wsdisplay_cmap *)data);
278
279 /* XXX There are no way to know framebuffer pa from a user program. */
280 case GRFIOCGINFO:
281 if (ms != NULL) {
282 gm = (void *)data;
283 memset(gm, 0, sizeof(struct grfinfo));
284 gm->gd_fbaddr = (void *)sc->sc_fbaddr;
285 gm->gd_fbrowbytes = ms->scr_ri.ri_stride;
286 return 0;
287 } else
288 return ENODEV;
289 case WSDISPLAYIO_LINEBYTES:
290 {
291 *(int *)data = ms->scr_ri.ri_stride;
292 return 0;
293 }
294 case WSDISPLAYIO_SMODE:
295 {
296 int new_mode = *(int*)data;
297 if (new_mode != sc->sc_mode)
298 {
299 sc->sc_mode = new_mode;
300 if (new_mode == WSDISPLAYIO_MODE_EMUL)
301 {
302 ofb_init_cmap(sc);
303 vcons_redraw_screen(ms);
304 }
305 }
306 }
307 return 0;
308 /* PCI config read/write passthrough. */
309 case PCI_IOC_CFGREAD:
310 case PCI_IOC_CFGWRITE:
311 return (pci_devioctl(sc->sc_pc, sc->sc_pcitag,
312 cmd, data, flag, l));
313 }
314 return EPASSTHROUGH;
315 }
316
317 static paddr_t
ofb_mmap(void * v,void * vs,off_t offset,int prot)318 ofb_mmap(void *v, void *vs, off_t offset, int prot)
319 {
320 struct vcons_data *vd = v;
321 struct ofb_softc *sc = vd->cookie;
322 u_int32_t *ap = sc->sc_addrs;
323 int i;
324
325 if (vd->active == NULL) {
326 printf("%s: no active screen.\n", device_xname(sc->sc_dev));
327 return -1;
328 }
329
330 /* framebuffer at offset 0 */
331 if ((offset >= 0) && (offset < sc->sc_fbsize))
332 return bus_space_mmap(sc->sc_memt, sc->sc_fbaddr, offset, prot,
333 BUS_SPACE_MAP_LINEAR);
334
335 /*
336 * restrict all other mappings to processes with superuser privileges
337 * or the kernel itself
338 */
339 if (kauth_authorize_machdep(kauth_cred_get(), KAUTH_MACHDEP_UNMANAGEDMEM,
340 NULL, NULL, NULL, NULL) != 0) {
341 printf("%s: mmap() rejected.\n", device_xname(sc->sc_dev));
342 return -1;
343 }
344
345 /* let them mmap() 0xa0000 - 0xbffff if it's not covered above */
346 #ifdef OFB_FAKE_VGA_FB
347 if (offset >=0xa0000 && offset < 0xbffff)
348 return sc->sc_fbaddr + offset - 0xa0000;
349 #endif
350
351 /* allow to map our IO space */
352 if ((offset >= 0xf2000000) && (offset < 0xf2800000)) {
353 return bus_space_mmap(sc->sc_iot, offset-0xf2000000, 0, prot,
354 BUS_SPACE_MAP_LINEAR);
355 }
356
357 for (i = 0; i < 6; i++) {
358 switch (ap[0] & OFW_PCI_PHYS_HI_SPACEMASK) {
359 case OFW_PCI_PHYS_HI_SPACE_MEM32:
360 if (offset >= ap[2] && offset < ap[2] + ap[4])
361 return bus_space_mmap(sc->sc_memt, offset, 0,
362 prot, BUS_SPACE_MAP_LINEAR);
363 }
364 ap += 5;
365 }
366 return -1;
367 }
368
369 static int
ofb_getcmap(struct ofb_softc * sc,struct wsdisplay_cmap * cm)370 ofb_getcmap(struct ofb_softc *sc, struct wsdisplay_cmap *cm)
371 {
372 u_int index = cm->index;
373 u_int count = cm->count;
374 int error;
375
376 if (index >= 256 || count > 256 || index + count > 256)
377 return EINVAL;
378
379 error = copyout(&sc->sc_cmap_red[index], cm->red, count);
380 if (error)
381 return error;
382 error = copyout(&sc->sc_cmap_green[index], cm->green, count);
383 if (error)
384 return error;
385 error = copyout(&sc->sc_cmap_blue[index], cm->blue, count);
386 if (error)
387 return error;
388
389 return 0;
390 }
391
392 int
ofb_putcmap(struct ofb_softc * sc,struct wsdisplay_cmap * cm)393 ofb_putcmap(struct ofb_softc *sc, struct wsdisplay_cmap *cm)
394 {
395 u_int index = cm->index;
396 u_int count = cm->count;
397 int i, error;
398 u_char rbuf[256], gbuf[256], bbuf[256];
399 u_char *r, *g, *b;
400
401 if (cm->index >= 256 || cm->count > 256 ||
402 (cm->index + cm->count) > 256)
403 return EINVAL;
404 error = copyin(cm->red, &rbuf[index], count);
405 if (error)
406 return error;
407 error = copyin(cm->green, &gbuf[index], count);
408 if (error)
409 return error;
410 error = copyin(cm->blue, &bbuf[index], count);
411 if (error)
412 return error;
413
414 memcpy(&sc->sc_cmap_red[index], &rbuf[index], count);
415 memcpy(&sc->sc_cmap_green[index], &gbuf[index], count);
416 memcpy(&sc->sc_cmap_blue[index], &bbuf[index], count);
417
418 r = &sc->sc_cmap_red[index];
419 g = &sc->sc_cmap_green[index];
420 b = &sc->sc_cmap_blue[index];
421 for (i = 0; i < count; i++) {
422 OF_call_method_1("color!", sc->sc_ih, 4, *r, *g, *b, index);
423 r++, g++, b++, index++;
424 }
425 return 0;
426 }
427
428 static void
ofb_putpalreg(struct ofb_softc * sc,int idx,uint8_t r,uint8_t g,uint8_t b)429 ofb_putpalreg(struct ofb_softc *sc, int idx, uint8_t r, uint8_t g, uint8_t b)
430 {
431 if ((idx<0) || (idx > 255))
432 return;
433 if (sc != NULL) {
434 OF_call_method_1("color!", sc->sc_ih, 4, r, g, b, idx);
435 sc->sc_cmap_red[idx] = r;
436 sc->sc_cmap_green[idx] = g;
437 sc->sc_cmap_blue[idx] = b;
438 } else {
439 OF_call_method_1("color!", console_instance, 4, r, g, b, idx);
440 }
441 }
442
443 static void
ofb_init_cmap(struct ofb_softc * sc)444 ofb_init_cmap(struct ofb_softc *sc)
445 {
446 int i;
447
448 /* mess with the palette only when we're running in 8 bit */
449 if (rascons_console_screen.scr_ri.ri_depth == 8) {
450 for (i = 0; i < 256; i++) {
451 ofb_putpalreg(sc, i, rasops_cmap[(i * 3) + 0],
452 rasops_cmap[(i * 3) + 1],
453 rasops_cmap[(i * 3) + 2]);
454 }
455 }
456 }
457