FreeBSD/Linux Kernel Cross Reference
sys/dev/fb/fbd.c
1 /*-
2 * Copyright (c) 2013 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Aleksandr Rybalko under sponsorship from the
6 * FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: releng/10.1/sys/dev/fb/fbd.c 271769 2014-09-18 14:38:18Z dumbbell $
30 */
31
32 /* Generic framebuffer */
33 /* TODO unlink from VT(9) */
34 /* TODO done normal /dev/fb methods */
35
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD: releng/10.1/sys/dev/fb/fbd.c 271769 2014-09-18 14:38:18Z dumbbell $");
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/bus.h>
42 #include <sys/conf.h>
43 #include <sys/kernel.h>
44 #include <sys/malloc.h>
45 #include <sys/module.h>
46 #include <sys/queue.h>
47 #include <sys/fbio.h>
48
49 #include <machine/bus.h>
50
51 #include <dev/vt/vt.h>
52 #include <dev/vt/hw/fb/vt_fb.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
95 fb_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
96 {
97
98 return (0);
99 }
100
101 static int
102 fb_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
103 {
104
105 return (0);
106 }
107
108 static int
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 error = 0; /* TODO */
138 break;
139
140 default:
141 error = ENOIOCTL;
142 break;
143 }
144 return (error);
145 }
146
147 static int
148 fb_read(struct cdev *dev, struct uio *uio, int ioflag)
149 {
150
151 return (0); /* XXX nothing to read, yet */
152 }
153
154 static int
155 fb_write(struct cdev *dev, struct uio *uio, int ioflag)
156 {
157
158 return (0); /* XXX nothing written */
159 }
160
161 static int
162 fb_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr, int nprot,
163 vm_memattr_t *memattr)
164 {
165 struct fb_info *info;
166
167 info = dev->si_drv1;
168
169 if ((info->fb_flags & FB_FLAG_NOMMAP) || info->fb_pbase == 0)
170 return (ENODEV);
171
172 if (offset < info->fb_size) {
173 *paddr = info->fb_pbase + offset;
174 return (0);
175 }
176 return (EINVAL);
177 }
178
179 static int
180 fb_init(struct fb_list_entry *entry, int unit)
181 {
182 struct fb_info *info;
183
184 info = entry->fb_info;
185 entry->fb_si = make_dev(&fb_cdevsw, unit, UID_ROOT, GID_WHEEL,
186 0600, "fb%d", unit);
187 entry->fb_si->si_drv1 = info;
188 info->fb_cdev = entry->fb_si;
189
190 return (0);
191 }
192
193 int
194 fbd_list()
195 {
196 struct fb_list_entry *entry;
197
198 if (LIST_EMPTY(&fb_list_head))
199 return (ENOENT);
200
201 LIST_FOREACH(entry, &fb_list_head, fb_list) {
202 printf("FB %s @%p\n", entry->fb_info->fb_name,
203 (void *)entry->fb_info->fb_pbase);
204 }
205
206 return (0);
207 }
208
209 static struct fb_list_entry *
210 fbd_find(struct fb_info* info)
211 {
212 struct fb_list_entry *entry, *tmp;
213
214 LIST_FOREACH_SAFE(entry, &fb_list_head, fb_list, tmp) {
215 if (entry->fb_info == info) {
216 return (entry);
217 }
218 }
219
220 return (NULL);
221 }
222
223 int
224 fbd_register(struct fb_info* info)
225 {
226 struct fb_list_entry *entry;
227 int err, first;
228
229 first = 0;
230 if (LIST_EMPTY(&fb_list_head))
231 first++;
232
233 entry = fbd_find(info);
234 if (entry != NULL) {
235 /* XXX Update framebuffer params */
236 return (0);
237 }
238
239 entry = malloc(sizeof(struct fb_list_entry), M_DEVBUF, M_WAITOK|M_ZERO);
240 entry->fb_info = info;
241
242 LIST_INSERT_HEAD(&fb_list_head, entry, fb_list);
243
244 err = fb_init(entry, framebuffer_dev_unit++);
245 if (err)
246 return (err);
247
248 if (first) {
249 err = vt_fb_attach(info);
250 if (err)
251 return (err);
252 }
253
254 return (0);
255 }
256
257 int
258 fbd_unregister(struct fb_info* info)
259 {
260 struct fb_list_entry *entry, *tmp;
261
262 LIST_FOREACH_SAFE(entry, &fb_list_head, fb_list, tmp) {
263 if (entry->fb_info == info) {
264 LIST_REMOVE(entry, fb_list);
265 free(entry, M_DEVBUF);
266 return (0);
267 }
268 }
269
270 return (ENOENT);
271 }
272
273 static void
274 register_fb_wrap(void *arg, void *ptr)
275 {
276
277 fbd_register((struct fb_info *)ptr);
278 }
279
280 static void
281 unregister_fb_wrap(void *arg, void *ptr)
282 {
283
284 fbd_unregister((struct fb_info *)ptr);
285 }
286
287 static void
288 fbd_evh_init(void *ctx)
289 {
290
291 EVENTHANDLER_REGISTER(register_framebuffer, register_fb_wrap, NULL,
292 EVENTHANDLER_PRI_ANY);
293 EVENTHANDLER_REGISTER(unregister_framebuffer, unregister_fb_wrap, NULL,
294 EVENTHANDLER_PRI_ANY);
295 }
296
297 /* Newbus methods. */
298 static int
299 fbd_probe(device_t dev)
300 {
301
302 return (BUS_PROBE_NOWILDCARD);
303 }
304
305 static int
306 fbd_attach(device_t dev)
307 {
308 struct fbd_softc *sc;
309 int err;
310
311 sc = device_get_softc(dev);
312
313 sc->sc_dev = dev;
314 sc->sc_info = FB_GETINFO(device_get_parent(dev));
315 if (sc->sc_info == NULL)
316 return (ENXIO);
317 err = fbd_register(sc->sc_info);
318
319 return (err);
320 }
321
322 static int
323 fbd_detach(device_t dev)
324 {
325 struct fbd_softc *sc;
326 int err;
327
328 sc = device_get_softc(dev);
329
330 err = fbd_unregister(sc->sc_info);
331
332 return (err);
333 }
334
335 static int
336 fbd_suspend(device_t dev)
337 {
338
339 vt_fb_suspend();
340 return (bus_generic_suspend(dev));
341 }
342
343 static int
344 fbd_resume(device_t dev)
345 {
346
347 vt_fb_resume();
348 return (bus_generic_resume(dev));
349 }
350
351 static device_method_t fbd_methods[] = {
352 /* Device interface */
353 DEVMETHOD(device_probe, fbd_probe),
354 DEVMETHOD(device_attach, fbd_attach),
355 DEVMETHOD(device_detach, fbd_detach),
356
357 DEVMETHOD(device_shutdown, bus_generic_shutdown),
358 DEVMETHOD(device_suspend, fbd_suspend),
359 DEVMETHOD(device_resume, fbd_resume),
360
361 { 0, 0 }
362 };
363
364 driver_t fbd_driver = {
365 "fbd",
366 fbd_methods,
367 sizeof(struct fbd_softc)
368 };
369
370 devclass_t fbd_devclass;
371
372 DRIVER_MODULE(fbd, fb, fbd_driver, fbd_devclass, 0, 0);
373 DRIVER_MODULE(fbd, drmn, fbd_driver, fbd_devclass, 0, 0);
374 MODULE_VERSION(fbd, 1);
375
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