1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2013 The FreeBSD Foundation
5 *
6 * This software was developed by Aleksandr Rybalko under sponsorship from the
7 * FreeBSD Foundation.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 /* Generic framebuffer */
32 /* TODO unlink from VT(9) */
33 /* TODO done normal /dev/fb methods */
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/bus.h>
38 #include <sys/conf.h>
39 #include <sys/eventhandler.h>
40 #include <sys/kernel.h>
41 #include <sys/malloc.h>
42 #include <sys/module.h>
43 #include <sys/queue.h>
44 #include <sys/fbio.h>
45
46 #include <machine/bus.h>
47
48 #include <dev/vt/vt.h>
49 #include <dev/vt/hw/fb/vt_fb.h>
50
51 #include <vm/vm.h>
52 #include <vm/pmap.h>
53
54 #include "fb_if.h"
55
56 LIST_HEAD(fb_list_head_t, fb_list_entry) fb_list_head =
57 LIST_HEAD_INITIALIZER(fb_list_head);
58 struct fb_list_entry {
59 struct fb_info *fb_info;
60 struct cdev *fb_si;
61 LIST_ENTRY(fb_list_entry) fb_list;
62 };
63
64 struct fbd_softc {
65 device_t sc_dev;
66 struct fb_info *sc_info;
67 };
68
69 static void fbd_evh_init(void *);
70 /* SI_ORDER_SECOND, just after EVENTHANDLERs initialized. */
71 SYSINIT(fbd_evh_init, SI_SUB_CONFIGURE, SI_ORDER_SECOND, fbd_evh_init, NULL);
72
73 static d_open_t fb_open;
74 static d_close_t fb_close;
75 static d_read_t fb_read;
76 static d_write_t fb_write;
77 static d_ioctl_t fb_ioctl;
78 static d_mmap_t fb_mmap;
79
80 static struct cdevsw fb_cdevsw = {
81 .d_version = D_VERSION,
82 .d_flags = D_NEEDGIANT,
83 .d_open = fb_open,
84 .d_close = fb_close,
85 .d_read = fb_read,
86 .d_write = fb_write,
87 .d_ioctl = fb_ioctl,
88 .d_mmap = fb_mmap,
89 .d_name = "fb",
90 };
91
92 static int framebuffer_dev_unit = 0;
93
94 static int
fb_open(struct cdev * dev,int oflags,int devtype,struct thread * td)95 fb_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
96 {
97
98 return (0);
99 }
100
101 static int
fb_close(struct cdev * dev,int fflag,int devtype,struct thread * td)102 fb_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
103 {
104
105 return (0);
106 }
107
108 static int
fb_ioctl(struct cdev * dev,u_long cmd,caddr_t data,int fflag,struct thread * td)109 fb_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
110 struct thread *td)
111 {
112 struct fb_info *info;
113 int error;
114
115 error = 0;
116 info = dev->si_drv1;
117
118 switch (cmd) {
119 case FBIOGTYPE:
120 bcopy(info, (struct fbtype *)data, sizeof(struct fbtype));
121 break;
122
123 case FBIO_GETWINORG: /* get frame buffer window origin */
124 *(u_int *)data = 0;
125 break;
126
127 case FBIO_GETDISPSTART: /* get display start address */
128 ((video_display_start_t *)data)->x = 0;
129 ((video_display_start_t *)data)->y = 0;
130 break;
131
132 case FBIO_GETLINEWIDTH: /* get scan line width in bytes */
133 *(u_int *)data = info->fb_stride;
134 break;
135
136 case FBIO_BLANK: /* blank display */
137 if (info->setblankmode != NULL)
138 error = info->setblankmode(info->fb_priv, *(int *)data);
139 break;
140
141 default:
142 error = ENOIOCTL;
143 break;
144 }
145 return (error);
146 }
147
148 static int
fb_read(struct cdev * dev,struct uio * uio,int ioflag)149 fb_read(struct cdev *dev, struct uio *uio, int ioflag)
150 {
151
152 return (0); /* XXX nothing to read, yet */
153 }
154
155 static int
fb_write(struct cdev * dev,struct uio * uio,int ioflag)156 fb_write(struct cdev *dev, struct uio *uio, int ioflag)
157 {
158
159 return (0); /* XXX nothing written */
160 }
161
162 static int
fb_mmap(struct cdev * dev,vm_ooffset_t offset,vm_paddr_t * paddr,int nprot,vm_memattr_t * memattr)163 fb_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr, int nprot,
164 vm_memattr_t *memattr)
165 {
166 struct fb_info *info;
167
168 info = dev->si_drv1;
169
170 if (info->fb_flags & FB_FLAG_NOMMAP)
171 return (ENODEV);
172
173 if (offset < info->fb_size) {
174 if (info->fb_pbase == 0)
175 *paddr = vtophys((uint8_t *)info->fb_vbase + offset);
176 else
177 *paddr = info->fb_pbase + offset;
178 if (info->fb_flags & FB_FLAG_MEMATTR)
179 *memattr = info->fb_memattr;
180 return (0);
181 }
182 return (EINVAL);
183 }
184
185 static int
fb_init(struct fb_list_entry * entry,int unit)186 fb_init(struct fb_list_entry *entry, int unit)
187 {
188 struct fb_info *info;
189
190 info = entry->fb_info;
191 entry->fb_si = make_dev(&fb_cdevsw, unit, UID_ROOT, GID_WHEEL,
192 0600, "fb%d", unit);
193 entry->fb_si->si_drv1 = info;
194 info->fb_cdev = entry->fb_si;
195
196 return (0);
197 }
198
199 int
fbd_list(void)200 fbd_list(void)
201 {
202 struct fb_list_entry *entry;
203
204 if (LIST_EMPTY(&fb_list_head))
205 return (ENOENT);
206
207 LIST_FOREACH(entry, &fb_list_head, fb_list) {
208 printf("FB %s @%#jx\n", entry->fb_info->fb_name,
209 (uintmax_t)entry->fb_info->fb_pbase);
210 }
211
212 return (0);
213 }
214
215 static struct fb_list_entry *
fbd_find(struct fb_info * info)216 fbd_find(struct fb_info* info)
217 {
218 struct fb_list_entry *entry, *tmp;
219
220 LIST_FOREACH_SAFE(entry, &fb_list_head, fb_list, tmp) {
221 if (entry->fb_info == info) {
222 return (entry);
223 }
224 }
225
226 return (NULL);
227 }
228
229 int
fbd_register(struct fb_info * info)230 fbd_register(struct fb_info* info)
231 {
232 struct fb_list_entry *entry;
233 int err, first;
234
235 first = 0;
236 if (LIST_EMPTY(&fb_list_head))
237 first++;
238
239 entry = fbd_find(info);
240 if (entry != NULL) {
241 /* XXX Update framebuffer params */
242 return (0);
243 }
244
245 entry = malloc(sizeof(struct fb_list_entry), M_DEVBUF, M_WAITOK|M_ZERO);
246 entry->fb_info = info;
247
248 LIST_INSERT_HEAD(&fb_list_head, entry, fb_list);
249
250 err = fb_init(entry, framebuffer_dev_unit++);
251 if (err)
252 return (err);
253
254 if (first) {
255 err = vt_fb_attach(info);
256 if (err)
257 return (err);
258 }
259
260 return (0);
261 }
262
263 int
fbd_unregister(struct fb_info * info)264 fbd_unregister(struct fb_info* info)
265 {
266 struct fb_list_entry *entry, *tmp;
267
268 LIST_FOREACH_SAFE(entry, &fb_list_head, fb_list, tmp) {
269 if (entry->fb_info == info) {
270 LIST_REMOVE(entry, fb_list);
271 if (LIST_EMPTY(&fb_list_head))
272 vt_fb_detach(info);
273 free(entry, M_DEVBUF);
274 return (0);
275 }
276 }
277
278 return (ENOENT);
279 }
280
281 static void
register_fb_wrap(void * arg,void * ptr)282 register_fb_wrap(void *arg, void *ptr)
283 {
284
285 fbd_register((struct fb_info *)ptr);
286 }
287
288 static void
unregister_fb_wrap(void * arg,void * ptr)289 unregister_fb_wrap(void *arg, void *ptr)
290 {
291
292 fbd_unregister((struct fb_info *)ptr);
293 }
294
295 static void
fbd_evh_init(void * ctx)296 fbd_evh_init(void *ctx)
297 {
298
299 EVENTHANDLER_REGISTER(register_framebuffer, register_fb_wrap, NULL,
300 EVENTHANDLER_PRI_ANY);
301 EVENTHANDLER_REGISTER(unregister_framebuffer, unregister_fb_wrap, NULL,
302 EVENTHANDLER_PRI_ANY);
303 }
304
305 /* Newbus methods. */
306 static int
fbd_probe(device_t dev)307 fbd_probe(device_t dev)
308 {
309
310 return (BUS_PROBE_NOWILDCARD);
311 }
312
313 static int
fbd_attach(device_t dev)314 fbd_attach(device_t dev)
315 {
316 struct fbd_softc *sc;
317 int err;
318
319 sc = device_get_softc(dev);
320
321 sc->sc_dev = dev;
322 sc->sc_info = FB_GETINFO(device_get_parent(dev));
323 if (sc->sc_info == NULL)
324 return (ENXIO);
325 err = fbd_register(sc->sc_info);
326
327 return (err);
328 }
329
330 static int
fbd_detach(device_t dev)331 fbd_detach(device_t dev)
332 {
333 struct fbd_softc *sc;
334 int err;
335
336 sc = device_get_softc(dev);
337
338 err = fbd_unregister(sc->sc_info);
339
340 return (err);
341 }
342
343 static device_method_t fbd_methods[] = {
344 /* Device interface */
345 DEVMETHOD(device_probe, fbd_probe),
346 DEVMETHOD(device_attach, fbd_attach),
347 DEVMETHOD(device_detach, fbd_detach),
348
349 DEVMETHOD(device_shutdown, bus_generic_shutdown),
350
351 { 0, 0 }
352 };
353
354 driver_t fbd_driver = {
355 "fbd",
356 fbd_methods,
357 sizeof(struct fbd_softc)
358 };
359
360 DRIVER_MODULE(fbd, fb, fbd_driver, 0, 0);
361 DRIVER_MODULE(fbd, drmn, fbd_driver, 0, 0);
362 DRIVER_MODULE(fbd, udl, fbd_driver, 0, 0);
363 MODULE_VERSION(fbd, 1);
364
365