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/11.0/sys/dev/fb/fbd.c 279752 2015-03-07 20:45:15Z hselasky $
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/11.0/sys/dev/fb/fbd.c 279752 2015-03-07 20:45:15Z hselasky $");
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 <vm/vm.h>
55 #include <vm/pmap.h>
56
57 #include "fb_if.h"
58
59 LIST_HEAD(fb_list_head_t, fb_list_entry) fb_list_head =
60 LIST_HEAD_INITIALIZER(fb_list_head);
61 struct fb_list_entry {
62 struct fb_info *fb_info;
63 struct cdev *fb_si;
64 LIST_ENTRY(fb_list_entry) fb_list;
65 };
66
67 struct fbd_softc {
68 device_t sc_dev;
69 struct fb_info *sc_info;
70 };
71
72 static void fbd_evh_init(void *);
73 /* SI_ORDER_SECOND, just after EVENTHANDLERs initialized. */
74 SYSINIT(fbd_evh_init, SI_SUB_CONFIGURE, SI_ORDER_SECOND, fbd_evh_init, NULL);
75
76 static d_open_t fb_open;
77 static d_close_t fb_close;
78 static d_read_t fb_read;
79 static d_write_t fb_write;
80 static d_ioctl_t fb_ioctl;
81 static d_mmap_t fb_mmap;
82
83 static struct cdevsw fb_cdevsw = {
84 .d_version = D_VERSION,
85 .d_flags = D_NEEDGIANT,
86 .d_open = fb_open,
87 .d_close = fb_close,
88 .d_read = fb_read,
89 .d_write = fb_write,
90 .d_ioctl = fb_ioctl,
91 .d_mmap = fb_mmap,
92 .d_name = "fb",
93 };
94
95 static int framebuffer_dev_unit = 0;
96
97 static int
98 fb_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
99 {
100
101 return (0);
102 }
103
104 static int
105 fb_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
106 {
107
108 return (0);
109 }
110
111 static int
112 fb_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
113 struct thread *td)
114 {
115 struct fb_info *info;
116 int error;
117
118 error = 0;
119 info = dev->si_drv1;
120
121 switch (cmd) {
122 case FBIOGTYPE:
123 bcopy(info, (struct fbtype *)data, sizeof(struct fbtype));
124 break;
125
126 case FBIO_GETWINORG: /* get frame buffer window origin */
127 *(u_int *)data = 0;
128 break;
129
130 case FBIO_GETDISPSTART: /* get display start address */
131 ((video_display_start_t *)data)->x = 0;
132 ((video_display_start_t *)data)->y = 0;
133 break;
134
135 case FBIO_GETLINEWIDTH: /* get scan line width in bytes */
136 *(u_int *)data = info->fb_stride;
137 break;
138
139 case FBIO_BLANK: /* blank display */
140 if (info->setblankmode != NULL)
141 error = info->setblankmode(info->fb_priv, *(int *)data);
142 break;
143
144 default:
145 error = ENOIOCTL;
146 break;
147 }
148 return (error);
149 }
150
151 static int
152 fb_read(struct cdev *dev, struct uio *uio, int ioflag)
153 {
154
155 return (0); /* XXX nothing to read, yet */
156 }
157
158 static int
159 fb_write(struct cdev *dev, struct uio *uio, int ioflag)
160 {
161
162 return (0); /* XXX nothing written */
163 }
164
165 static int
166 fb_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr, int nprot,
167 vm_memattr_t *memattr)
168 {
169 struct fb_info *info;
170
171 info = dev->si_drv1;
172
173 if (info->fb_flags & FB_FLAG_NOMMAP)
174 return (ENODEV);
175
176 if (offset >= 0 && offset < info->fb_size) {
177 if (info->fb_pbase == 0)
178 *paddr = vtophys((uint8_t *)info->fb_vbase + offset);
179 else
180 *paddr = info->fb_pbase + offset;
181 return (0);
182 }
183 return (EINVAL);
184 }
185
186 static int
187 fb_init(struct fb_list_entry *entry, int unit)
188 {
189 struct fb_info *info;
190
191 info = entry->fb_info;
192 entry->fb_si = make_dev(&fb_cdevsw, unit, UID_ROOT, GID_WHEEL,
193 0600, "fb%d", unit);
194 entry->fb_si->si_drv1 = info;
195 info->fb_cdev = entry->fb_si;
196
197 return (0);
198 }
199
200 int
201 fbd_list()
202 {
203 struct fb_list_entry *entry;
204
205 if (LIST_EMPTY(&fb_list_head))
206 return (ENOENT);
207
208 LIST_FOREACH(entry, &fb_list_head, fb_list) {
209 printf("FB %s @%p\n", entry->fb_info->fb_name,
210 (void *)entry->fb_info->fb_pbase);
211 }
212
213 return (0);
214 }
215
216 static struct fb_list_entry *
217 fbd_find(struct fb_info* info)
218 {
219 struct fb_list_entry *entry, *tmp;
220
221 LIST_FOREACH_SAFE(entry, &fb_list_head, fb_list, tmp) {
222 if (entry->fb_info == info) {
223 return (entry);
224 }
225 }
226
227 return (NULL);
228 }
229
230 int
231 fbd_register(struct fb_info* info)
232 {
233 struct fb_list_entry *entry;
234 int err, first;
235
236 first = 0;
237 if (LIST_EMPTY(&fb_list_head))
238 first++;
239
240 entry = fbd_find(info);
241 if (entry != NULL) {
242 /* XXX Update framebuffer params */
243 return (0);
244 }
245
246 entry = malloc(sizeof(struct fb_list_entry), M_DEVBUF, M_WAITOK|M_ZERO);
247 entry->fb_info = info;
248
249 LIST_INSERT_HEAD(&fb_list_head, entry, fb_list);
250
251 err = fb_init(entry, framebuffer_dev_unit++);
252 if (err)
253 return (err);
254
255 if (first) {
256 err = vt_fb_attach(info);
257 if (err)
258 return (err);
259 }
260
261 return (0);
262 }
263
264 int
265 fbd_unregister(struct fb_info* info)
266 {
267 struct fb_list_entry *entry, *tmp;
268
269 LIST_FOREACH_SAFE(entry, &fb_list_head, fb_list, tmp) {
270 if (entry->fb_info == info) {
271 LIST_REMOVE(entry, fb_list);
272 if (LIST_EMPTY(&fb_list_head))
273 vt_fb_detach(info);
274 free(entry, M_DEVBUF);
275 return (0);
276 }
277 }
278
279 return (ENOENT);
280 }
281
282 static void
283 register_fb_wrap(void *arg, void *ptr)
284 {
285
286 fbd_register((struct fb_info *)ptr);
287 }
288
289 static void
290 unregister_fb_wrap(void *arg, void *ptr)
291 {
292
293 fbd_unregister((struct fb_info *)ptr);
294 }
295
296 static void
297 fbd_evh_init(void *ctx)
298 {
299
300 EVENTHANDLER_REGISTER(register_framebuffer, register_fb_wrap, NULL,
301 EVENTHANDLER_PRI_ANY);
302 EVENTHANDLER_REGISTER(unregister_framebuffer, unregister_fb_wrap, NULL,
303 EVENTHANDLER_PRI_ANY);
304 }
305
306 /* Newbus methods. */
307 static int
308 fbd_probe(device_t dev)
309 {
310
311 return (BUS_PROBE_NOWILDCARD);
312 }
313
314 static int
315 fbd_attach(device_t dev)
316 {
317 struct fbd_softc *sc;
318 int err;
319
320 sc = device_get_softc(dev);
321
322 sc->sc_dev = dev;
323 sc->sc_info = FB_GETINFO(device_get_parent(dev));
324 if (sc->sc_info == NULL)
325 return (ENXIO);
326 err = fbd_register(sc->sc_info);
327
328 return (err);
329 }
330
331 static int
332 fbd_detach(device_t dev)
333 {
334 struct fbd_softc *sc;
335 int err;
336
337 sc = device_get_softc(dev);
338
339 err = fbd_unregister(sc->sc_info);
340
341 return (err);
342 }
343
344 static device_method_t fbd_methods[] = {
345 /* Device interface */
346 DEVMETHOD(device_probe, fbd_probe),
347 DEVMETHOD(device_attach, fbd_attach),
348 DEVMETHOD(device_detach, fbd_detach),
349
350 DEVMETHOD(device_shutdown, bus_generic_shutdown),
351
352 { 0, 0 }
353 };
354
355 driver_t fbd_driver = {
356 "fbd",
357 fbd_methods,
358 sizeof(struct fbd_softc)
359 };
360
361 devclass_t fbd_devclass;
362
363 DRIVER_MODULE(fbd, fb, fbd_driver, fbd_devclass, 0, 0);
364 DRIVER_MODULE(fbd, drmn, fbd_driver, fbd_devclass, 0, 0);
365 DRIVER_MODULE(fbd, udl, fbd_driver, fbd_devclass, 0, 0);
366 MODULE_VERSION(fbd, 1);
367
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