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/cdefs.h>
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/bus.h>
39 #include <sys/conf.h>
40 #include <sys/eventhandler.h>
41 #include <sys/kernel.h>
42 #include <sys/malloc.h>
43 #include <sys/module.h>
44 #include <sys/queue.h>
45 #include <sys/fbio.h>
46
47 #include <machine/bus.h>
48
49 #include <dev/vt/vt.h>
50 #include <dev/vt/hw/fb/vt_fb.h>
51
52 #include <vm/vm.h>
53 #include <vm/pmap.h>
54
55 #include "fb_if.h"
56
57 LIST_HEAD(fb_list_head_t, fb_list_entry) fb_list_head =
58 LIST_HEAD_INITIALIZER(fb_list_head);
59 struct fb_list_entry {
60 struct fb_info *fb_info;
61 struct cdev *fb_si;
62 LIST_ENTRY(fb_list_entry) fb_list;
63 };
64
65 struct fbd_softc {
66 device_t sc_dev;
67 struct fb_info *sc_info;
68 };
69
70 static void fbd_evh_init(void *);
71 /* SI_ORDER_SECOND, just after EVENTHANDLERs initialized. */
72 SYSINIT(fbd_evh_init, SI_SUB_CONFIGURE, SI_ORDER_SECOND, fbd_evh_init, NULL);
73
74 static d_open_t fb_open;
75 static d_close_t fb_close;
76 static d_read_t fb_read;
77 static d_write_t fb_write;
78 static d_ioctl_t fb_ioctl;
79 static d_mmap_t fb_mmap;
80
81 static struct cdevsw fb_cdevsw = {
82 .d_version = D_VERSION,
83 .d_flags = D_NEEDGIANT,
84 .d_open = fb_open,
85 .d_close = fb_close,
86 .d_read = fb_read,
87 .d_write = fb_write,
88 .d_ioctl = fb_ioctl,
89 .d_mmap = fb_mmap,
90 .d_name = "fb",
91 };
92
93 static int framebuffer_dev_unit = 0;
94
95 static int
fb_open(struct cdev * dev,int oflags,int devtype,struct thread * td)96 fb_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
97 {
98
99 return (0);
100 }
101
102 static int
fb_close(struct cdev * dev,int fflag,int devtype,struct thread * td)103 fb_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
104 {
105
106 return (0);
107 }
108
109 static int
fb_ioctl(struct cdev * dev,u_long cmd,caddr_t data,int fflag,struct thread * td)110 fb_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
111 struct thread *td)
112 {
113 struct fb_info *info;
114 int error;
115
116 error = 0;
117 info = dev->si_drv1;
118
119 switch (cmd) {
120 case FBIOGTYPE:
121 bcopy(info, (struct fbtype *)data, sizeof(struct fbtype));
122 break;
123
124 case FBIO_GETWINORG: /* get frame buffer window origin */
125 *(u_int *)data = 0;
126 break;
127
128 case FBIO_GETDISPSTART: /* get display start address */
129 ((video_display_start_t *)data)->x = 0;
130 ((video_display_start_t *)data)->y = 0;
131 break;
132
133 case FBIO_GETLINEWIDTH: /* get scan line width in bytes */
134 *(u_int *)data = info->fb_stride;
135 break;
136
137 case FBIO_BLANK: /* blank display */
138 if (info->setblankmode != NULL)
139 error = info->setblankmode(info->fb_priv, *(int *)data);
140 break;
141
142 default:
143 error = ENOIOCTL;
144 break;
145 }
146 return (error);
147 }
148
149 static int
fb_read(struct cdev * dev,struct uio * uio,int ioflag)150 fb_read(struct cdev *dev, struct uio *uio, int ioflag)
151 {
152
153 return (0); /* XXX nothing to read, yet */
154 }
155
156 static int
fb_write(struct cdev * dev,struct uio * uio,int ioflag)157 fb_write(struct cdev *dev, struct uio *uio, int ioflag)
158 {
159
160 return (0); /* XXX nothing written */
161 }
162
163 static int
fb_mmap(struct cdev * dev,vm_ooffset_t offset,vm_paddr_t * paddr,int nprot,vm_memattr_t * memattr)164 fb_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr, int nprot,
165 vm_memattr_t *memattr)
166 {
167 struct fb_info *info;
168
169 info = dev->si_drv1;
170
171 if (info->fb_flags & FB_FLAG_NOMMAP)
172 return (ENODEV);
173
174 if (offset < info->fb_size) {
175 if (info->fb_pbase == 0)
176 *paddr = vtophys((uint8_t *)info->fb_vbase + offset);
177 else
178 *paddr = info->fb_pbase + offset;
179 if (info->fb_flags & FB_FLAG_MEMATTR)
180 *memattr = info->fb_memattr;
181 return (0);
182 }
183 return (EINVAL);
184 }
185
186 static int
fb_init(struct fb_list_entry * entry,int unit)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
fbd_list(void)201 fbd_list(void)
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 @%#jx\n", entry->fb_info->fb_name,
210 (uintmax_t)entry->fb_info->fb_pbase);
211 }
212
213 return (0);
214 }
215
216 static struct fb_list_entry *
fbd_find(struct fb_info * info)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
fbd_register(struct fb_info * info)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
fbd_unregister(struct fb_info * info)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
register_fb_wrap(void * arg,void * ptr)283 register_fb_wrap(void *arg, void *ptr)
284 {
285
286 fbd_register((struct fb_info *)ptr);
287 }
288
289 static void
unregister_fb_wrap(void * arg,void * ptr)290 unregister_fb_wrap(void *arg, void *ptr)
291 {
292
293 fbd_unregister((struct fb_info *)ptr);
294 }
295
296 static void
fbd_evh_init(void * ctx)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
fbd_probe(device_t dev)308 fbd_probe(device_t dev)
309 {
310
311 return (BUS_PROBE_NOWILDCARD);
312 }
313
314 static int
fbd_attach(device_t dev)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
fbd_detach(device_t dev)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 DRIVER_MODULE(fbd, fb, fbd_driver, 0, 0);
362 DRIVER_MODULE(fbd, drmn, fbd_driver, 0, 0);
363 DRIVER_MODULE(fbd, udl, fbd_driver, 0, 0);
364 MODULE_VERSION(fbd, 1);
365
366