4 * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer as
12 * the first lines of this file unmodified.
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 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 * $FreeBSD: src/sys/dev/fb/fb.c,v 1.11.2.2 2000/08/02 22:35:22 peter Exp $
31 * $DragonFly: src/sys/dev/video/fb/fb.c,v 1.19 2008/01/09 21:29:11 swildner Exp $
36 #include <sys/param.h>
37 #include <sys/systm.h>
40 #include <sys/kernel.h>
41 #include <sys/malloc.h>
44 #include <sys/linker_set.h>
45 #include <sys/device.h>
46 #include <sys/thread2.h>
53 SET_DECLARE(videodriver_set, const video_driver_t);
58 * We need at least one entry each in order to initialize a video card
59 * for the kernel console. The arrays will be increased dynamically
63 static int vid_malloc;
64 static int adapters = 1;
65 static video_adapter_t *adp_ini;
66 static video_adapter_t **adapter = &adp_ini;
67 static video_switch_t *vidsw_ini;
68 video_switch_t **vidsw = &vidsw_ini;
70 #ifdef FB_INSTALL_CDEV
71 static cdev_t vidcdevsw_ini;
72 static cdev_t *vidcdevsw = &vidcdevsw_ini;
78 vid_realloc_array(void)
80 video_adapter_t **new_adp;
81 video_switch_t **new_vidsw;
82 #ifdef FB_INSTALL_CDEV
91 newsize = ((adapters + ARRAY_DELTA)/ARRAY_DELTA)*ARRAY_DELTA;
92 new_adp = kmalloc(sizeof(*new_adp)*newsize, M_DEVBUF, M_WAITOK | M_ZERO);
93 new_vidsw = kmalloc(sizeof(*new_vidsw)*newsize, M_DEVBUF,
95 #ifdef FB_INSTALL_CDEV
96 new_cdevsw = kmalloc(sizeof(*new_cdevsw)*newsize, M_DEVBUF,
99 bcopy(adapter, new_adp, sizeof(*adapter)*adapters);
100 bcopy(vidsw, new_vidsw, sizeof(*vidsw)*adapters);
101 #ifdef FB_INSTALL_CDEV
102 bcopy(vidcdevsw, new_cdevsw, sizeof(*vidcdevsw)*adapters);
105 kfree(adapter, M_DEVBUF);
106 kfree(vidsw, M_DEVBUF);
107 #ifdef FB_INSTALL_CDEV
108 kfree(vidcdevsw, M_DEVBUF);
113 #ifdef FB_INSTALL_CDEV
114 vidcdevsw = new_cdevsw;
120 kprintf("fb: new array size %d\n", adapters);
126 vid_malloc_init(void *arg)
131 SYSINIT(vid_mem, SI_BOOT1_POST, SI_ORDER_ANY, vid_malloc_init, NULL);
134 * Low-level frame buffer driver functions
135 * frame buffer subdrivers, such as the VGA driver, call these functions
136 * to initialize the video_adapter structure and register it to the virtual
137 * frame buffer driver `fb'.
140 /* initialize the video_adapter_t structure */
142 vid_init_struct(video_adapter_t *adp, char *name, int type, int unit)
150 /* Register a video adapter */
152 vid_register(video_adapter_t *adp)
154 const video_driver_t **list;
155 const video_driver_t *p;
158 for (index = 0; index < adapters; ++index) {
159 if (adapter[index] == NULL)
162 if (index >= adapters) {
163 if (vid_realloc_array())
167 adp->va_index = index;
168 adp->va_token = NULL;
169 lwkt_gettoken(&tty_token);
170 SET_FOREACH(list, videodriver_set) {
172 if (strcmp(p->name, adp->va_name) == 0) {
173 adapter[index] = adp;
174 vidsw[index] = p->vidsw;
175 lwkt_reltoken(&tty_token);
180 lwkt_reltoken(&tty_token);
185 vid_unregister(video_adapter_t *adp)
187 lwkt_gettoken(&tty_token);
188 if ((adp->va_index < 0) || (adp->va_index >= adapters)) {
189 lwkt_reltoken(&tty_token);
192 if (adapter[adp->va_index] != adp) {
193 lwkt_reltoken(&tty_token);
197 adapter[adp->va_index] = NULL;
198 vidsw[adp->va_index] = NULL;
199 lwkt_reltoken(&tty_token);
203 /* Get video I/O function table */
205 vid_get_switch(char *name)
207 const video_driver_t **list;
208 const video_driver_t *p;
210 lwkt_gettoken(&tty_token);
211 SET_FOREACH(list, videodriver_set) {
213 if (strcmp(p->name, name) == 0) {
214 lwkt_reltoken(&tty_token);
219 lwkt_reltoken(&tty_token);
224 * Video card client functions
225 * Video card clients, such as the console driver `syscons' and the frame
226 * buffer cdev driver, use these functions to claim and release a card for
230 /* find the video card specified by a driver name and a unit number */
232 vid_find_adapter(char *driver, int unit)
236 for (i = 0; i < adapters; ++i) {
237 if (adapter[i] == NULL)
239 if (strcmp("*", driver) && strcmp(adapter[i]->va_name, driver))
241 if ((unit != -1) && (adapter[i]->va_unit != unit))
248 /* allocate a video card */
250 vid_allocate(char *driver, int unit, void *id)
255 index = vid_find_adapter(driver, unit);
257 if (adapter[index]->va_token) {
261 adapter[index]->va_token = id;
268 vid_release(video_adapter_t *adp, void *id)
273 if (adp->va_token == NULL) {
275 } else if (adp->va_token != id) {
278 adp->va_token = NULL;
285 /* Get a video adapter structure */
287 vid_get_adapter(int index)
289 if ((index < 0) || (index >= adapters))
291 return adapter[index];
294 /* Configure drivers: this is a backdoor for the console driver XXX */
296 vid_configure(int flags)
298 const video_driver_t **list;
299 const video_driver_t *p;
301 SET_FOREACH(list, videodriver_set) {
303 if (p->configure != NULL)
304 (*p->configure)(flags);
311 * Virtual frame buffer cdev driver functions
312 * The virtual frame buffer driver dispatches driver functions to
313 * appropriate subdrivers.
316 #define FB_DRIVER_NAME "fb"
318 #ifdef FB_INSTALL_CDEV
322 static devclass_t fb_devclass;
324 static int fbprobe(device_t dev);
325 static int fbattach(device_t dev);
327 static device_method_t fb_methods[] = {
328 DEVMETHOD(device_probe, fbprobe),
329 DEVMETHOD(device_attach, fbattach),
331 DEVMETHOD(bus_print_child, bus_generic_print_child),
335 static driver_t fb_driver = {
342 fbprobe(device_t dev)
346 unit = device_get_unit(dev);
347 if (unit >= adapters)
349 if (adapter[unit] == NULL)
352 device_set_desc(dev, "generic frame buffer");
357 fbattach(device_t dev)
359 kprintf("fbattach: about to attach children\n");
360 bus_generic_attach(dev);
364 #endif /* experimental */
366 #define FB_UNIT(dev) minor(dev)
367 #define FB_MKMINOR(unit) (u)
370 static d_default_t fboperate;
371 static d_open_t fbopen;
373 #define CDEV_MAJOR 123 /* XXX */
375 static struct dev_ops fb_ops = {
376 { FB_DRIVER_NAME, CDEV_MAJOR, 0 },
377 .d_default = fboperate,
385 static int fb_devsw_installed = FALSE;
387 if (!fb_devsw_installed) {
389 dev_ops_add(&fb_ops, 0, 0);
391 fb_devsw_installed = TRUE;
395 PSEUDO_SET(vfbattach, fb);
398 * Note: dev represents the actual video device, not the frame buffer
401 fb_attach(cdev_t dev, video_adapter_t *adp)
403 if (adp->va_index >= adapters)
405 if (adapter[adp->va_index] != adp)
410 adp->va_minor = minor(dev);
411 vidcdevsw[adp->va_index] = dev;
414 kprintf("fb%d at %s%d\n", adp->va_index, adp->va_name, adp->va_unit);
419 * Note: dev represents the actual video device, not the frame buffer
422 fb_detach(cdev_t dev, video_adapter_t *adp)
424 if (adp->va_index >= adapters)
426 if (adapter[adp->va_index] != adp)
428 if (vidcdevsw[adp->va_index] != dev)
432 vidcdevsw[adp->va_index] = NULL;
440 fbopen(struct dev_open_args *ap)
442 cdev_t dev = ap->a_head.a_dev;
447 if (unit < 0 || unit >= adapters)
449 if ((fdev = vidcdevsw[unit]) == NULL)
451 return dev_dopen(fdev, ap->a_oflags, ap->a_devtype, ap->a_cred);
455 fboperate(struct dev_generic_args *ap)
457 cdev_t dev = ap->a_dev;
462 if ((fdev = vidcdevsw[unit]) == NULL)
465 return dev_doperate(ap);
470 * Generic frame buffer cdev driver functions
471 * Frame buffer subdrivers may call these functions to implement common
475 int genfbopen(genfb_softc_t *sc, video_adapter_t *adp, int flag, int mode,
479 if (!(sc->gfb_flags & FB_OPEN))
480 sc->gfb_flags |= FB_OPEN;
485 int genfbclose(genfb_softc_t *sc, video_adapter_t *adp, int flag, int mode)
488 sc->gfb_flags &= ~FB_OPEN;
493 int genfbread(genfb_softc_t *sc, video_adapter_t *adp, struct uio *uio,
501 lwkt_gettoken(&tty_token);
503 size = adp->va_buffer_size/adp->va_info.vi_planes;
504 while (uio->uio_resid > 0) {
505 if (uio->uio_offset >= size)
507 offset = uio->uio_offset%adp->va_window_size;
508 len = (int)szmin(uio->uio_resid, size - uio->uio_offset);
509 len = imin(len, adp->va_window_size - offset);
512 (*vidsw[adp->va_index]->set_win_org)(adp, uio->uio_offset);
513 error = uiomove((caddr_t)(adp->va_window + offset),
518 lwkt_reltoken(&tty_token);
522 int genfbwrite(genfb_softc_t *sc, video_adapter_t *adp, struct uio *uio,
528 int genfbioctl(genfb_softc_t *sc, video_adapter_t *adp, u_long cmd,
529 caddr_t arg, int flag, struct ucred *cred)
533 if (adp == NULL) /* XXX */
535 lwkt_gettoken(&tty_token);
536 error = (*vidsw[adp->va_index]->ioctl)(adp, cmd, arg);
537 if (error == ENOIOCTL)
539 lwkt_reltoken(&tty_token);
543 int genfbmmap(genfb_softc_t *sc, video_adapter_t *adp, vm_offset_t offset,
548 lwkt_gettoken(&tty_token);
549 error = (*vidsw[adp->va_index]->mmap)(adp, offset, prot);
550 lwkt_reltoken(&tty_token);
554 #endif /* FB_INSTALL_CDEV */
557 adapter_name(int type)
564 { KD_HERCULES, "Hercules" },
573 for (i = 0; names[i].type != -1; ++i)
574 if (names[i].type == type)
576 return names[i].name;
580 * Generic low-level frame buffer functions
581 * The low-level functions in the frame buffer subdriver may use these
586 fb_dump_adp_info(char *driver, video_adapter_t *adp, int level)
591 kprintf("%s%d: %s%d, %s, type:%s (%d), flags:0x%x\n",
592 FB_DRIVER_NAME, adp->va_index, driver, adp->va_unit, adp->va_name,
593 adapter_name(adp->va_type), adp->va_type, adp->va_flags);
594 kprintf("%s%d: port:0x%x-0x%x, mem:0x%x 0x%x\n",
595 FB_DRIVER_NAME, adp->va_index,
596 adp->va_io_base, adp->va_io_base + adp->va_io_size - 1,
597 adp->va_mem_base, adp->va_mem_size);
598 kprintf("%s%d: init mode:%d, bios mode:%d, current mode:%d\n",
599 FB_DRIVER_NAME, adp->va_index,
600 adp->va_initial_mode, adp->va_initial_bios_mode, adp->va_mode);
601 kprintf("%s%d: window:%p size:%dk gran:%dk, buf:%p size:%dk\n",
602 FB_DRIVER_NAME, adp->va_index,
603 (void *)adp->va_window, (int)adp->va_window_size/1024,
604 (int)adp->va_window_gran/1024, (void *)adp->va_buffer,
605 (int)adp->va_buffer_size/1024);
609 fb_dump_mode_info(char *driver, video_adapter_t *adp, video_info_t *info,
615 kprintf("%s%d: %s, mode:%d, flags:0x%x ",
616 driver, adp->va_unit, adp->va_name, info->vi_mode, info->vi_flags);
617 if (info->vi_flags & V_INFO_GRAPHICS)
618 kprintf("G %dx%dx%d, %d plane(s), font:%dx%d, ",
619 info->vi_width, info->vi_height,
620 info->vi_depth, info->vi_planes,
621 info->vi_cwidth, info->vi_cheight);
623 kprintf("T %dx%d, font:%dx%d, ",
624 info->vi_width, info->vi_height,
625 info->vi_cwidth, info->vi_cheight);
626 kprintf("win:0x%x\n", info->vi_window);
630 fb_type(int adp_type)
636 { FBTYPE_MDA, KD_MONO },
637 { FBTYPE_HERCULES, KD_HERCULES },
638 { FBTYPE_CGA, KD_CGA },
639 { FBTYPE_EGA, KD_EGA },
640 { FBTYPE_VGA, KD_VGA },
641 { FBTYPE_TGA, KD_TGA },
645 for (i = 0; i < sizeof(types)/sizeof(types[0]); ++i) {
646 if (types[i].va_type == adp_type)
647 return types[i].fb_type;
653 fb_commonioctl(video_adapter_t *adp, u_long cmd, caddr_t arg)
657 /* assert(adp != NULL) */
662 lwkt_gettoken(&tty_token);
665 case FBIO_ADAPTER: /* get video adapter index */
666 *(int *)arg = adp->va_index;
669 case FBIO_ADPTYPE: /* get video adapter type */
670 *(int *)arg = adp->va_type;
673 case FBIO_ADPINFO: /* get video adapter info */
674 ((video_adapter_info_t *)arg)->va_index = adp->va_index;
675 ((video_adapter_info_t *)arg)->va_type = adp->va_type;
676 bcopy(adp->va_name, ((video_adapter_info_t *)arg)->va_name,
677 imin(strlen(adp->va_name) + 1,
678 sizeof(((video_adapter_info_t *)arg)->va_name)));
679 ((video_adapter_info_t *)arg)->va_unit = adp->va_unit;
680 ((video_adapter_info_t *)arg)->va_flags = adp->va_flags;
681 ((video_adapter_info_t *)arg)->va_io_base = adp->va_io_base;
682 ((video_adapter_info_t *)arg)->va_io_size = adp->va_io_size;
683 ((video_adapter_info_t *)arg)->va_mem_base = adp->va_mem_base;
684 ((video_adapter_info_t *)arg)->va_mem_size = adp->va_mem_size;
685 ((video_adapter_info_t *)arg)->va_window
687 = vtophys(adp->va_window);
691 ((video_adapter_info_t *)arg)->va_window_size
692 = adp->va_window_size;
693 ((video_adapter_info_t *)arg)->va_window_gran
694 = adp->va_window_gran;
695 ((video_adapter_info_t *)arg)->va_window_orig
696 = adp->va_window_orig;
697 ((video_adapter_info_t *)arg)->va_unused0
699 = (adp->va_buffer) ? vtophys(adp->va_buffer) : 0;
703 ((video_adapter_info_t *)arg)->va_buffer_size
704 = adp->va_buffer_size;
705 ((video_adapter_info_t *)arg)->va_mode = adp->va_mode;
706 ((video_adapter_info_t *)arg)->va_initial_mode
707 = adp->va_initial_mode;
708 ((video_adapter_info_t *)arg)->va_initial_bios_mode
709 = adp->va_initial_bios_mode;
710 ((video_adapter_info_t *)arg)->va_line_width
711 = adp->va_line_width;
712 ((video_adapter_info_t *)arg)->va_disp_start.x
713 = adp->va_disp_start.x;
714 ((video_adapter_info_t *)arg)->va_disp_start.y
715 = adp->va_disp_start.y;
718 case FBIO_MODEINFO: /* get mode information */
719 error = (*vidsw[adp->va_index]->get_info)(adp,
720 ((video_info_t *)arg)->vi_mode,
721 (video_info_t *)arg);
726 case FBIO_FINDMODE: /* find a matching video mode */
727 error = (*vidsw[adp->va_index]->query_mode)(adp,
728 (video_info_t *)arg);
731 case FBIO_GETMODE: /* get video mode */
732 *(int *)arg = adp->va_mode;
735 case FBIO_SETMODE: /* set video mode */
736 error = (*vidsw[adp->va_index]->set_mode)(adp, *(int *)arg);
738 error = ENODEV; /* EINVAL? */
741 case FBIO_GETWINORG: /* get frame buffer window origin */
742 *(u_int *)arg = adp->va_window_orig;
745 case FBIO_GETDISPSTART: /* get display start address */
746 ((video_display_start_t *)arg)->x = adp->va_disp_start.x;
747 ((video_display_start_t *)arg)->y = adp->va_disp_start.y;
750 case FBIO_GETLINEWIDTH: /* get scan line width in bytes */
751 *(u_int *)arg = adp->va_line_width;
754 case FBIO_GETPALETTE: /* get color palette */
755 case FBIO_SETPALETTE: /* set color palette */
762 case FBIO_SETWINORG: /* set frame buffer window origin */
763 case FBIO_SETDISPSTART: /* set display start address */
764 case FBIO_SETLINEWIDTH: /* set scan line width in pixel */
782 lwkt_reltoken(&tty_token);