diff options
Diffstat (limited to 'sys/dev/vt/hw/efifb/efifb.c')
| -rw-r--r-- | sys/dev/vt/hw/efifb/efifb.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/sys/dev/vt/hw/efifb/efifb.c b/sys/dev/vt/hw/efifb/efifb.c new file mode 100644 index 0000000..e140bfe --- /dev/null +++ b/sys/dev/vt/hw/efifb/efifb.c @@ -0,0 +1,166 @@ +/*- + * Copyright (c) 2014 The FreeBSD Foundation + * All rights reserved. + * + * This software was developed by Aleksandr Rybalko under sponsorship from the + * FreeBSD Foundation. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/fbio.h> +#include <sys/linker.h> + +#include "opt_platform.h" + +#include <machine/efi.h> +#include <machine/metadata.h> +#include <machine/vm.h> +#include <machine/vmparam.h> +#include <vm/vm.h> +#include <vm/pmap.h> +#include <machine/pmap.h> + +#include <dev/vt/vt.h> +#include <dev/vt/hw/fb/vt_fb.h> +#include <dev/vt/colors/vt_termcolors.h> + +static vd_init_t vt_efifb_init; +static vd_probe_t vt_efifb_probe; + +static struct vt_driver vt_efifb_driver = { + .vd_name = "efifb", + .vd_probe = vt_efifb_probe, + .vd_init = vt_efifb_init, + .vd_blank = vt_fb_blank, + .vd_bitbltchr = vt_fb_bitbltchr, + .vd_maskbitbltchr = vt_fb_maskbitbltchr, + /* Better than VGA, but still generic driver. */ + .vd_priority = VD_PRIORITY_GENERIC + 1, +}; + +static struct fb_info local_info; +VT_DRIVER_DECLARE(vt_efifb, vt_efifb_driver); + +static int +vt_efifb_probe(struct vt_device *vd) +{ + int disabled; + struct efi_fb *efifb; + caddr_t kmdp; + + disabled = 0; + TUNABLE_INT_FETCH("hw.syscons.disable", &disabled); + if (disabled != 0) + return (CN_DEAD); + + kmdp = preload_search_by_type("elf kernel"); + if (kmdp == NULL) + kmdp = preload_search_by_type("elf64 kernel"); + efifb = (struct efi_fb *)preload_search_info(kmdp, + MODINFO_METADATA | MODINFOMD_EFI_FB); + if (efifb == NULL) + return (CN_DEAD); + + return (CN_INTERNAL); +} + +static int +vt_efifb_init(struct vt_device *vd) +{ + int depth, d, i, len; + struct fb_info *info; + struct efi_fb *efifb; + caddr_t kmdp; + + info = vd->vd_softc; + if (info == NULL) + info = vd->vd_softc = (void *)&local_info; + + kmdp = preload_search_by_type("elf kernel"); + if (kmdp == NULL) + kmdp = preload_search_by_type("elf64 kernel"); + efifb = (struct efi_fb *)preload_search_info(kmdp, + MODINFO_METADATA | MODINFOMD_EFI_FB); + if (efifb == NULL) + return (CN_DEAD); + + info->fb_height = efifb->fb_height; + info->fb_width = efifb->fb_width; + + depth = fls(efifb->fb_mask_red); + d = fls(efifb->fb_mask_green); + depth = d > depth ? d : depth; + d = fls(efifb->fb_mask_blue); + depth = d > depth ? d : depth; + d = fls(efifb->fb_mask_reserved); + depth = d > depth ? d : depth; + info->fb_depth = depth; + + info->fb_stride = efifb->fb_stride * (depth / 8); + + vt_generate_vga_palette(info->fb_cmap, COLOR_FORMAT_RGB, + efifb->fb_mask_red, ffs(efifb->fb_mask_red) - 1, + efifb->fb_mask_green, ffs(efifb->fb_mask_green) - 1, + efifb->fb_mask_blue, ffs(efifb->fb_mask_blue) - 1); + + info->fb_size = info->fb_height * info->fb_stride; + info->fb_pbase = efifb->fb_addr; + /* + * We could use pmap_mapdev here except that the kernel pmap + * hasn't been created yet and hence any attempt to lock it will + * fail. + */ + info->fb_vbase = PHYS_TO_DMAP(efifb->fb_addr); + + /* blank full size */ + len = info->fb_size / 4; + for (i = 0; i < len; i++) { + ((uint32_t *)info->fb_vbase)[i] = 0; + } + + /* Get pixel storage size. */ + info->fb_bpp = info->fb_stride / info->fb_width * 8; + + /* + * Early FB driver work with static window buffer, so reduce to minimal + * size, buffer or screen. + */ + info->fb_width = MIN(info->fb_width, VT_FB_DEFAULT_WIDTH); + info->fb_height = MIN(info->fb_height, VT_FB_DEFAULT_HEIGHT); + + fb_probe(info); + vt_fb_init(vd); + + /* Clear the screen. */ + vt_fb_blank(vd, TC_BLACK); + + return (CN_INTERNAL); +} |
