2 * Copyright (c) 2013 The FreeBSD Foundation
5 * This software was developed by Aleksandr Rybalko under sponsorship from the
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
32 /* Generic framebuffer */
33 /* TODO unlink from VT(9) */
34 /* TODO done normal /dev/fb methods */
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
39 #include <sys/param.h>
40 #include <sys/systm.h>
42 #include <sys/kernel.h>
43 #include <sys/malloc.h>
44 #include <sys/queue.h>
46 #include <dev/vt/hw/fb/vt_fb.h>
48 LIST_HEAD(fb_list_head_t, fb_list_entry) fb_list_head =
49 LIST_HEAD_INITIALIZER(fb_list_head);
50 struct fb_list_entry {
51 struct fb_info *fb_info;
53 LIST_ENTRY(fb_list_entry) fb_list;
56 static void fbd_evh_init(void *);
57 /* SI_ORDER_SECOND, just after EVENTHANDLERs initialized. */
58 SYSINIT(fbd_evh_init, SI_SUB_CONFIGURE, SI_ORDER_SECOND, fbd_evh_init, NULL);
60 static d_open_t fb_open;
61 static d_close_t fb_close;
62 static d_read_t fb_read;
63 static d_write_t fb_write;
64 static d_ioctl_t fb_ioctl;
65 static d_mmap_t fb_mmap;
67 static struct cdevsw fb_cdevsw = {
68 .d_version = D_VERSION,
69 .d_flags = D_NEEDGIANT,
79 static int framebuffer_dev_unit = 0;
82 fb_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
89 fb_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
96 fb_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
104 fb_read(struct cdev *dev, struct uio *uio, int ioflag)
107 return (0); /* XXX nothing to read, yet */
111 fb_write(struct cdev *dev, struct uio *uio, int ioflag)
114 return (0); /* XXX nothing written */
118 fb_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr, int nprot,
119 vm_memattr_t *memattr)
121 struct fb_info *info;
124 if (offset < info->fb_size) {
125 *paddr = info->fb_pbase + offset;
133 vt_fb_mem_wr1(struct fb_info *sc, uint32_t o, uint8_t v)
136 KASSERT((o < sc->fb_size), ("Offset %#08x out of fb size", o));
137 *(uint8_t *)(sc->fb_vbase + o) = v;
141 vt_fb_mem_wr2(struct fb_info *sc, uint32_t o, uint16_t v)
144 KASSERT((o < sc->fb_size), ("Offset %#08x out of fb size", o));
145 *(uint16_t *)(sc->fb_vbase + o) = v;
149 vt_fb_mem_wr4(struct fb_info *sc, uint32_t o, uint32_t v)
152 KASSERT((o < sc->fb_size), ("Offset %#08x out of fb size", o));
153 *(uint32_t *)(sc->fb_vbase + o) = v;
157 vt_fb_mem_copy(struct fb_info *sc, uint32_t offset_to, uint32_t offset_from,
161 memmove((void *)(sc->fb_vbase + offset_to), (void *)(sc->fb_vbase +
166 vt_fb_indir_wr1(struct fb_info *sc, uint32_t o, uint8_t v)
169 KASSERT((o < sc->fb_size), ("Offset %#08x out of fb size", o));
170 sc->fb_write(sc->fb_priv, o, &v, 1);
174 vt_fb_indir_wr2(struct fb_info *sc, uint32_t o, uint16_t v)
177 KASSERT((o < sc->fb_size), ("Offset %#08x out of fb size", o));
178 sc->fb_write(sc->fb_priv, o, &v, 2);
182 vt_fb_indir_wr4(struct fb_info *sc, uint32_t o, uint32_t v)
185 KASSERT((o < sc->fb_size), ("Offset %#08x out of fb size", o));
186 sc->fb_write(sc->fb_priv, o, &v, 4);
190 vt_fb_indir_copy(struct fb_info *sc, uint32_t offset_to, uint32_t offset_from,
194 sc->copy(sc->fb_priv, offset_to, offset_from, size);
198 fb_probe(struct fb_info *info)
201 if (info->fb_size == 0)
204 if (info->fb_write != NULL) {
205 if (info->fb_write == NULL) {
208 info->fb_flags |= FB_FLAG_NOMMAP;
209 info->wr1 = &vt_fb_indir_wr1;
210 info->wr2 = &vt_fb_indir_wr2;
211 info->wr4 = &vt_fb_indir_wr4;
212 info->copy = &vt_fb_indir_copy;
213 } else if (info->fb_vbase != 0) {
214 if (info->fb_pbase == 0)
215 info->fb_flags |= FB_FLAG_NOMMAP;
216 info->wr1 = &vt_fb_mem_wr1;
217 info->wr2 = &vt_fb_mem_wr2;
218 info->wr4 = &vt_fb_mem_wr4;
219 info->copy = &vt_fb_mem_copy;
228 fb_init(struct fb_list_entry *entry, int unit)
230 struct fb_info *info;
232 info = entry->fb_info;
233 entry->fb_si = make_dev(&fb_cdevsw, unit, UID_ROOT, GID_WHEEL,
235 entry->fb_si->si_drv1 = info;
243 struct fb_list_entry *entry;
245 if (LIST_EMPTY(&fb_list_head))
248 LIST_FOREACH(entry, &fb_list_head, fb_list) {
249 printf("FB %s @%p\n", entry->fb_info->fb_name,
250 (void *)entry->fb_info->fb_pbase);
256 static struct fb_list_entry *
257 fbd_find(struct fb_info* info)
259 struct fb_list_entry *entry, *tmp;
261 LIST_FOREACH_SAFE(entry, &fb_list_head, fb_list, tmp) {
262 if (entry->fb_info == info) {
271 fbd_register(struct fb_info* info)
273 struct fb_list_entry *entry;
277 if (LIST_EMPTY(&fb_list_head))
280 entry = fbd_find(info);
282 /* XXX Update framebuffer params */
286 err = fb_probe(info);
290 entry = malloc(sizeof(struct fb_list_entry), M_DEVBUF, M_WAITOK|M_ZERO);
291 entry->fb_info = info;
293 LIST_INSERT_HEAD(&fb_list_head, entry, fb_list);
295 err = fb_init(entry, framebuffer_dev_unit++);
306 fbd_unregister(struct fb_info* info)
308 struct fb_list_entry *entry, *tmp;
310 LIST_FOREACH_SAFE(entry, &fb_list_head, fb_list, tmp) {
311 if (entry->fb_info == info) {
312 LIST_REMOVE(entry, fb_list);
313 free(entry, M_DEVBUF);
322 register_fb_wrap(void *arg, void *ptr)
325 fbd_register((struct fb_info *)ptr);
329 unregister_fb_wrap(void *arg, void *ptr)
332 fbd_unregister((struct fb_info *)ptr);
336 fbd_evh_init(void *ctx)
339 EVENTHANDLER_REGISTER(register_framebuffer, register_fb_wrap, NULL,
340 EVENTHANDLER_PRI_ANY);
341 EVENTHANDLER_REGISTER(unregister_framebuffer, unregister_fb_wrap, NULL,
342 EVENTHANDLER_PRI_ANY);