1/*-
2 * Copyright (c) 2014 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Aleksandr Rybalko under sponsorship from the
6 * FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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.
16 *
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
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD: releng/11.0/sys/dev/vt/hw/efifb/efifb.c 298433 2016-04-21 19:57:40Z pfg $");
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/kernel.h>
36#include <sys/fbio.h>
37#include <sys/linker.h>
38
39#include "opt_platform.h"
40
41#include <machine/metadata.h>
42#include <machine/vmparam.h>
43#include <vm/vm.h>
44#include <vm/pmap.h>
45
46#include <dev/vt/vt.h>
47#include <dev/vt/hw/fb/vt_fb.h>
48#include <dev/vt/colors/vt_termcolors.h>
49
50static vd_init_t vt_efifb_init;
51static vd_probe_t vt_efifb_probe;
52
53static struct vt_driver vt_efifb_driver = {
54	.vd_name = "efifb",
55	.vd_probe = vt_efifb_probe,
56	.vd_init = vt_efifb_init,
57	.vd_blank = vt_fb_blank,
58	.vd_bitblt_text = vt_fb_bitblt_text,
59	.vd_bitblt_bmp = vt_fb_bitblt_bitmap,
60	.vd_drawrect = vt_fb_drawrect,
61	.vd_setpixel = vt_fb_setpixel,
62	.vd_fb_ioctl = vt_fb_ioctl,
63	.vd_fb_mmap = vt_fb_mmap,
64	/* Better than VGA, but still generic driver. */
65	.vd_priority = VD_PRIORITY_GENERIC + 1,
66};
67
68static struct fb_info local_info;
69VT_DRIVER_DECLARE(vt_efifb, vt_efifb_driver);
70
71static int
72vt_efifb_probe(struct vt_device *vd)
73{
74	int		disabled;
75	struct efi_fb	*efifb;
76	caddr_t		kmdp;
77
78	disabled = 0;
79	TUNABLE_INT_FETCH("hw.syscons.disable", &disabled);
80	if (disabled != 0)
81		return (CN_DEAD);
82
83	kmdp = preload_search_by_type("elf kernel");
84	if (kmdp == NULL)
85		kmdp = preload_search_by_type("elf64 kernel");
86	efifb = (struct efi_fb *)preload_search_info(kmdp,
87	    MODINFO_METADATA | MODINFOMD_EFI_FB);
88	if (efifb == NULL)
89		return (CN_DEAD);
90
91	return (CN_INTERNAL);
92}
93
94static int
95vt_efifb_init(struct vt_device *vd)
96{
97	struct fb_info	*info;
98	struct efi_fb	*efifb;
99	caddr_t		kmdp;
100
101	info = vd->vd_softc;
102	if (info == NULL)
103		info = vd->vd_softc = (void *)&local_info;
104
105	kmdp = preload_search_by_type("elf kernel");
106	if (kmdp == NULL)
107		kmdp = preload_search_by_type("elf64 kernel");
108	efifb = (struct efi_fb *)preload_search_info(kmdp,
109	    MODINFO_METADATA | MODINFOMD_EFI_FB);
110	if (efifb == NULL)
111		return (CN_DEAD);
112
113	info->fb_height = efifb->fb_height;
114	info->fb_width = efifb->fb_width;
115
116	info->fb_depth = fls(efifb->fb_mask_red | efifb->fb_mask_green |
117	    efifb->fb_mask_blue | efifb->fb_mask_reserved);
118	/* Round to a multiple of the bits in a byte. */
119	info->fb_bpp = roundup2(info->fb_depth, NBBY);
120
121	/* Stride in bytes, not pixels */
122	info->fb_stride = efifb->fb_stride * (info->fb_bpp / NBBY);
123
124	vt_generate_cons_palette(info->fb_cmap, COLOR_FORMAT_RGB,
125	    efifb->fb_mask_red, ffs(efifb->fb_mask_red) - 1,
126	    efifb->fb_mask_green, ffs(efifb->fb_mask_green) - 1,
127	    efifb->fb_mask_blue, ffs(efifb->fb_mask_blue) - 1);
128
129	info->fb_size = info->fb_height * info->fb_stride;
130	info->fb_pbase = efifb->fb_addr;
131	info->fb_vbase = (intptr_t)pmap_mapdev_attr(info->fb_pbase,
132	    info->fb_size, VM_MEMATTR_WRITE_COMBINING);
133
134	vt_fb_init(vd);
135
136	return (CN_INTERNAL);
137}
138