2 * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer as
10 * the first lines of this file unmodified.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 * $FreeBSD: src/sys/dev/fb/fb.c,v 1.11.2.2 2000/08/02 22:35:22 peter Exp $
29 * $DragonFly: src/sys/dev/video/fb/fb.c,v 1.12 2005/07/10 00:52:24 swildner Exp $
34 #include <sys/param.h>
35 #include <sys/systm.h>
38 #include <sys/kernel.h>
39 #include <sys/malloc.h>
42 #include <sys/linker_set.h>
43 #include <sys/device.h>
44 #include <sys/thread2.h>
51 SET_DECLARE(videodriver_set, const video_driver_t);
56 * We need at least one entry each in order to initialize a video card
57 * for the kernel console. The arrays will be increased dynamically
61 static int vid_malloc;
62 static int adapters = 1;
63 static video_adapter_t *adp_ini;
64 static video_adapter_t **adapter = &adp_ini;
65 static video_switch_t *vidsw_ini;
66 video_switch_t **vidsw = &vidsw_ini;
68 #ifdef FB_INSTALL_CDEV
69 static dev_t vidcdevsw_ini;
70 static dev_t *vidcdevsw = &vidcdevsw_ini;
76 vid_realloc_array(void)
78 video_adapter_t **new_adp;
79 video_switch_t **new_vidsw;
80 #ifdef FB_INSTALL_CDEV
89 newsize = ((adapters + ARRAY_DELTA)/ARRAY_DELTA)*ARRAY_DELTA;
90 new_adp = malloc(sizeof(*new_adp)*newsize, M_DEVBUF, M_WAITOK | M_ZERO);
91 new_vidsw = malloc(sizeof(*new_vidsw)*newsize, M_DEVBUF,
93 #ifdef FB_INSTALL_CDEV
94 new_cdevsw = malloc(sizeof(*new_cdevsw)*newsize, M_DEVBUF,
97 bcopy(adapter, new_adp, sizeof(*adapter)*adapters);
98 bcopy(vidsw, new_vidsw, sizeof(*vidsw)*adapters);
99 #ifdef FB_INSTALL_CDEV
100 bcopy(vidcdevsw, new_cdevsw, sizeof(*vidcdevsw)*adapters);
103 free(adapter, M_DEVBUF);
104 free(vidsw, M_DEVBUF);
105 #ifdef FB_INSTALL_CDEV
106 free(vidcdevsw, M_DEVBUF);
111 #ifdef FB_INSTALL_CDEV
112 vidcdevsw = new_cdevsw;
118 printf("fb: new array size %d\n", adapters);
124 vid_malloc_init(void *arg)
129 SYSINIT(vid_mem, SI_SUB_KMEM, SI_ORDER_ANY, vid_malloc_init, NULL);
132 * Low-level frame buffer driver functions
133 * frame buffer subdrivers, such as the VGA driver, call these functions
134 * to initialize the video_adapter structure and register it to the virtual
135 * frame buffer driver `fb'.
138 /* initialize the video_adapter_t structure */
140 vid_init_struct(video_adapter_t *adp, char *name, int type, int unit)
148 /* Register a video adapter */
150 vid_register(video_adapter_t *adp)
152 const video_driver_t **list;
153 const video_driver_t *p;
156 for (index = 0; index < adapters; ++index) {
157 if (adapter[index] == NULL)
160 if (index >= adapters) {
161 if (vid_realloc_array())
165 adp->va_index = index;
166 adp->va_token = NULL;
167 SET_FOREACH(list, videodriver_set) {
169 if (strcmp(p->name, adp->va_name) == 0) {
170 adapter[index] = adp;
171 vidsw[index] = p->vidsw;
180 vid_unregister(video_adapter_t *adp)
182 if ((adp->va_index < 0) || (adp->va_index >= adapters))
184 if (adapter[adp->va_index] != adp)
187 adapter[adp->va_index] = NULL;
188 vidsw[adp->va_index] = NULL;
192 /* Get video I/O function table */
194 *vid_get_switch(char *name)
196 const video_driver_t **list;
197 const video_driver_t *p;
199 SET_FOREACH(list, videodriver_set) {
201 if (strcmp(p->name, name) == 0)
209 * Video card client functions
210 * Video card clients, such as the console driver `syscons' and the frame
211 * buffer cdev driver, use these functions to claim and release a card for
215 /* find the video card specified by a driver name and a unit number */
217 vid_find_adapter(char *driver, int unit)
221 for (i = 0; i < adapters; ++i) {
222 if (adapter[i] == NULL)
224 if (strcmp("*", driver) && strcmp(adapter[i]->va_name, driver))
226 if ((unit != -1) && (adapter[i]->va_unit != unit))
233 /* allocate a video card */
235 vid_allocate(char *driver, int unit, void *id)
240 index = vid_find_adapter(driver, unit);
242 if (adapter[index]->va_token) {
246 adapter[index]->va_token = id;
253 vid_release(video_adapter_t *adp, void *id)
258 if (adp->va_token == NULL) {
260 } else if (adp->va_token != id) {
263 adp->va_token = NULL;
270 /* Get a video adapter structure */
272 *vid_get_adapter(int index)
274 if ((index < 0) || (index >= adapters))
276 return adapter[index];
279 /* Configure drivers: this is a backdoor for the console driver XXX */
281 vid_configure(int flags)
283 const video_driver_t **list;
284 const video_driver_t *p;
286 SET_FOREACH(list, videodriver_set) {
288 if (p->configure != NULL)
289 (*p->configure)(flags);
296 * Virtual frame buffer cdev driver functions
297 * The virtual frame buffer driver dispatches driver functions to
298 * appropriate subdrivers.
301 #define FB_DRIVER_NAME "fb"
303 #ifdef FB_INSTALL_CDEV
307 static devclass_t fb_devclass;
309 static int fbprobe(device_t dev);
310 static int fbattach(device_t dev);
312 static device_method_t fb_methods[] = {
313 DEVMETHOD(device_probe, fbprobe),
314 DEVMETHOD(device_attach, fbattach),
316 DEVMETHOD(bus_print_child, bus_generic_print_child),
320 static driver_t fb_driver = {
327 fbprobe(device_t dev)
331 unit = device_get_unit(dev);
332 if (unit >= adapters)
334 if (adapter[unit] == NULL)
337 device_set_desc(dev, "generic frame buffer");
342 fbattach(device_t dev)
344 printf("fbattach: about to attach children\n");
345 bus_generic_attach(dev);
349 #endif /* experimental */
351 #define FB_UNIT(dev) minor(dev)
352 #define FB_MKMINOR(unit) (u)
354 static d_open_t fbopen;
355 static d_close_t fbclose;
356 static d_read_t fbread;
357 static d_write_t fbwrite;
358 static d_ioctl_t fbioctl;
359 static d_mmap_t fbmmap;
361 #define CDEV_MAJOR 123 /* XXX */
363 static struct cdevsw fb_cdevsw = {
364 /* name */ FB_DRIVER_NAME,
365 /* maj */ CDEV_MAJOR,
377 /* strategy */ nostrategy,
385 static int fb_devsw_installed = FALSE;
387 if (!fb_devsw_installed) {
388 cdevsw_add(&fb_cdevsw, 0, 0);
389 fb_devsw_installed = TRUE;
393 PSEUDO_SET(vfbattach, fb);
396 * Note: dev represents the actual video device, not the frame buffer
399 fb_attach(dev_t dev, video_adapter_t *adp)
401 if (adp->va_index >= adapters)
403 if (adapter[adp->va_index] != adp)
408 adp->va_minor = minor(dev);
409 vidcdevsw[adp->va_index] = dev;
412 printf("fb%d at %s%d\n", adp->va_index, adp->va_name, adp->va_unit);
417 * Note: dev represents the actual video device, not the frame buffer
420 fb_detach(dev_t dev, video_adapter_t *adp)
422 if (adp->va_index >= adapters)
424 if (adapter[adp->va_index] != adp)
426 if (vidcdevsw[adp->va_index] != dev)
430 vidcdevsw[adp->va_index] = NULL;
437 fbopen(dev_t dev, int flag, int mode, struct thread *td)
443 if (unit >= adapters)
445 if ((fdev = vidcdevsw[unit]) == NULL)
447 return dev_dopen(fdev, flag, mode, td);
451 fbclose(dev_t dev, int flag, int mode, struct thread *td)
457 if ((fdev = vidcdevsw[unit]) == NULL)
459 return dev_dclose(fdev, flag, mode, td);
463 fbread(dev_t dev, struct uio *uio, int flag)
469 if ((fdev = vidcdevsw[unit]) == NULL)
471 return dev_dread(fdev, uio, flag);
475 fbwrite(dev_t dev, struct uio *uio, int flag)
481 if ((fdev = vidcdevsw[unit]) == NULL)
483 return dev_dwrite(fdev, uio, flag);
487 fbioctl(dev_t dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
493 if ((fdev = vidcdevsw[unit]) == NULL)
495 return dev_dioctl(fdev, cmd, arg, flag, td);
499 fbmmap(dev_t dev, vm_offset_t offset, int nprot)
505 if ((fdev = vidcdevsw[unit]) == NULL)
507 return (dev_dmmap(fdev, offset, nprot));
511 DEV_DRIVER_MODULE(fb, ???, fb_driver, fb_devclass, fb_cdevsw, 0, 0);
515 * Generic frame buffer cdev driver functions
516 * Frame buffer subdrivers may call these functions to implement common
520 int genfbopen(genfb_softc_t *sc, video_adapter_t *adp, int flag, int mode,
524 if (!(sc->gfb_flags & FB_OPEN))
525 sc->gfb_flags |= FB_OPEN;
530 int genfbclose(genfb_softc_t *sc, video_adapter_t *adp, int flag, int mode,
534 sc->gfb_flags &= ~FB_OPEN;
539 int genfbread(genfb_softc_t *sc, video_adapter_t *adp, struct uio *uio,
548 size = adp->va_buffer_size/adp->va_info.vi_planes;
549 while (uio->uio_resid > 0) {
550 if (uio->uio_offset >= size)
552 offset = uio->uio_offset%adp->va_window_size;
553 len = imin(uio->uio_resid, size - uio->uio_offset);
554 len = imin(len, adp->va_window_size - offset);
557 (*vidsw[adp->va_index]->set_win_org)(adp, uio->uio_offset);
558 error = uiomove((caddr_t)(adp->va_window + offset), len, uio);
565 int genfbwrite(genfb_softc_t *sc, video_adapter_t *adp, struct uio *uio,
571 int genfbioctl(genfb_softc_t *sc, video_adapter_t *adp, u_long cmd,
572 caddr_t arg, int flag, struct thread *td)
576 if (adp == NULL) /* XXX */
578 error = (*vidsw[adp->va_index]->ioctl)(adp, cmd, arg);
579 if (error == ENOIOCTL)
584 int genfbmmap(genfb_softc_t *sc, video_adapter_t *adp, vm_offset_t offset,
587 return (*vidsw[adp->va_index]->mmap)(adp, offset, prot);
590 #endif /* FB_INSTALL_CDEV */
593 *adapter_name(int type)
600 { KD_HERCULES, "Hercules" },
609 for (i = 0; names[i].type != -1; ++i)
610 if (names[i].type == type)
612 return names[i].name;
616 * Generic low-level frame buffer functions
617 * The low-level functions in the frame buffer subdriver may use these
622 fb_dump_adp_info(char *driver, video_adapter_t *adp, int level)
627 printf("%s%d: %s%d, %s, type:%s (%d), flags:0x%x\n",
628 FB_DRIVER_NAME, adp->va_index, driver, adp->va_unit, adp->va_name,
629 adapter_name(adp->va_type), adp->va_type, adp->va_flags);
630 printf("%s%d: port:0x%x-0x%x, crtc:0x%x, mem:0x%x 0x%x\n",
631 FB_DRIVER_NAME, adp->va_index,
632 adp->va_io_base, adp->va_io_base + adp->va_io_size - 1,
633 adp->va_crtc_addr, adp->va_mem_base, adp->va_mem_size);
634 printf("%s%d: init mode:%d, bios mode:%d, current mode:%d\n",
635 FB_DRIVER_NAME, adp->va_index,
636 adp->va_initial_mode, adp->va_initial_bios_mode, adp->va_mode);
637 printf("%s%d: window:%p size:%dk gran:%dk, buf:%p size:%dk\n",
638 FB_DRIVER_NAME, adp->va_index,
639 (void *)adp->va_window, (int)adp->va_window_size/1024,
640 (int)adp->va_window_gran/1024, (void *)adp->va_buffer,
641 (int)adp->va_buffer_size/1024);
645 fb_dump_mode_info(char *driver, video_adapter_t *adp, video_info_t *info,
651 printf("%s%d: %s, mode:%d, flags:0x%x ",
652 driver, adp->va_unit, adp->va_name, info->vi_mode, info->vi_flags);
653 if (info->vi_flags & V_INFO_GRAPHICS)
654 printf("G %dx%dx%d, %d plane(s), font:%dx%d, ",
655 info->vi_width, info->vi_height,
656 info->vi_depth, info->vi_planes,
657 info->vi_cwidth, info->vi_cheight);
659 printf("T %dx%d, font:%dx%d, ",
660 info->vi_width, info->vi_height,
661 info->vi_cwidth, info->vi_cheight);
662 printf("win:0x%x\n", info->vi_window);
666 fb_type(int adp_type)
672 { FBTYPE_MDA, KD_MONO },
673 { FBTYPE_HERCULES, KD_HERCULES },
674 { FBTYPE_CGA, KD_CGA },
675 { FBTYPE_EGA, KD_EGA },
676 { FBTYPE_VGA, KD_VGA },
677 { FBTYPE_TGA, KD_TGA },
681 for (i = 0; i < sizeof(types)/sizeof(types[0]); ++i) {
682 if (types[i].va_type == adp_type)
683 return types[i].fb_type;
689 fb_commonioctl(video_adapter_t *adp, u_long cmd, caddr_t arg)
693 /* assert(adp != NULL) */
700 case FBIO_ADAPTER: /* get video adapter index */
701 *(int *)arg = adp->va_index;
704 case FBIO_ADPTYPE: /* get video adapter type */
705 *(int *)arg = adp->va_type;
708 case FBIO_ADPINFO: /* get video adapter info */
709 ((video_adapter_info_t *)arg)->va_index = adp->va_index;
710 ((video_adapter_info_t *)arg)->va_type = adp->va_type;
711 bcopy(adp->va_name, ((video_adapter_info_t *)arg)->va_name,
712 imin(strlen(adp->va_name) + 1,
713 sizeof(((video_adapter_info_t *)arg)->va_name)));
714 ((video_adapter_info_t *)arg)->va_unit = adp->va_unit;
715 ((video_adapter_info_t *)arg)->va_flags = adp->va_flags;
716 ((video_adapter_info_t *)arg)->va_io_base = adp->va_io_base;
717 ((video_adapter_info_t *)arg)->va_io_size = adp->va_io_size;
718 ((video_adapter_info_t *)arg)->va_crtc_addr = adp->va_crtc_addr;
719 ((video_adapter_info_t *)arg)->va_mem_base = adp->va_mem_base;
720 ((video_adapter_info_t *)arg)->va_mem_size = adp->va_mem_size;
721 ((video_adapter_info_t *)arg)->va_window
723 = vtophys(adp->va_window);
727 ((video_adapter_info_t *)arg)->va_window_size
728 = adp->va_window_size;
729 ((video_adapter_info_t *)arg)->va_window_gran
730 = adp->va_window_gran;
731 ((video_adapter_info_t *)arg)->va_window_orig
732 = adp->va_window_orig;
733 ((video_adapter_info_t *)arg)->va_unused0
735 = (adp->va_buffer) ? vtophys(adp->va_buffer) : 0;
739 ((video_adapter_info_t *)arg)->va_buffer_size
740 = adp->va_buffer_size;
741 ((video_adapter_info_t *)arg)->va_mode = adp->va_mode;
742 ((video_adapter_info_t *)arg)->va_initial_mode
743 = adp->va_initial_mode;
744 ((video_adapter_info_t *)arg)->va_initial_bios_mode
745 = adp->va_initial_bios_mode;
746 ((video_adapter_info_t *)arg)->va_line_width
747 = adp->va_line_width;
748 ((video_adapter_info_t *)arg)->va_disp_start.x
749 = adp->va_disp_start.x;
750 ((video_adapter_info_t *)arg)->va_disp_start.y
751 = adp->va_disp_start.y;
754 case FBIO_MODEINFO: /* get mode information */
755 error = (*vidsw[adp->va_index]->get_info)(adp,
756 ((video_info_t *)arg)->vi_mode,
757 (video_info_t *)arg);
762 case FBIO_FINDMODE: /* find a matching video mode */
763 error = (*vidsw[adp->va_index]->query_mode)(adp,
764 (video_info_t *)arg);
767 case FBIO_GETMODE: /* get video mode */
768 *(int *)arg = adp->va_mode;
771 case FBIO_SETMODE: /* set video mode */
772 error = (*vidsw[adp->va_index]->set_mode)(adp, *(int *)arg);
774 error = ENODEV; /* EINVAL? */
777 case FBIO_GETWINORG: /* get frame buffer window origin */
778 *(u_int *)arg = adp->va_window_orig;
781 case FBIO_GETDISPSTART: /* get display start address */
782 ((video_display_start_t *)arg)->x = adp->va_disp_start.x;
783 ((video_display_start_t *)arg)->y = adp->va_disp_start.y;
786 case FBIO_GETLINEWIDTH: /* get scan line width in bytes */
787 *(u_int *)arg = adp->va_line_width;
790 case FBIO_GETPALETTE: /* get color palette */
791 case FBIO_SETPALETTE: /* set color palette */
798 case FBIO_SETWINORG: /* set frame buffer window origin */
799 case FBIO_SETDISPSTART: /* set display start address */
800 case FBIO_SETLINEWIDTH: /* set scan line width in pixel */