1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2014 The FreeBSD Foundation
5 *
6 * This software was developed by Aleksandr Rybalko under sponsorship from the
7 * FreeBSD Foundation.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include <sys/cdefs.h>
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/fbio.h>
36 #include <sys/linker.h>
37
38 #include "opt_platform.h"
39
40 #include <machine/metadata.h>
41 #include <machine/vmparam.h>
42 #include <vm/vm.h>
43 #include <vm/pmap.h>
44
45 #include <dev/vt/vt.h>
46 #include <dev/vt/hw/fb/vt_fb.h>
47 #include <dev/vt/colors/vt_termcolors.h>
48
49 static vd_init_t vt_vbefb_init;
50 static vd_fini_t vt_vbefb_fini;
51 static vd_probe_t vt_vbefb_probe;
52
53 static struct vt_driver vt_vbefb_driver = {
54 .vd_name = "vbefb",
55 .vd_probe = vt_vbefb_probe,
56 .vd_init = vt_vbefb_init,
57 .vd_fini = vt_vbefb_fini,
58 .vd_blank = vt_fb_blank,
59 .vd_bitblt_text = vt_fb_bitblt_text,
60 .vd_invalidate_text = vt_fb_invalidate_text,
61 .vd_bitblt_bmp = vt_fb_bitblt_bitmap,
62 .vd_bitblt_argb = vt_fb_bitblt_argb,
63 .vd_drawrect = vt_fb_drawrect,
64 .vd_setpixel = vt_fb_setpixel,
65 .vd_fb_ioctl = vt_fb_ioctl,
66 .vd_fb_mmap = vt_fb_mmap,
67 .vd_suspend = vt_suspend,
68 .vd_resume = vt_resume,
69 /* Better than VGA, but still generic driver. */
70 .vd_priority = VD_PRIORITY_GENERIC + 1,
71 };
72
73 static struct fb_info local_vbe_info;
74 VT_DRIVER_DECLARE(vt_vbefb, vt_vbefb_driver);
75
76 static int
vt_vbefb_probe(struct vt_device * vd)77 vt_vbefb_probe(struct vt_device *vd)
78 {
79 int disabled;
80 struct vbe_fb *vbefb;
81 caddr_t kmdp;
82
83 disabled = 0;
84 TUNABLE_INT_FETCH("hw.syscons.disable", &disabled);
85 if (disabled != 0)
86 return (CN_DEAD);
87
88 kmdp = preload_search_by_type("elf kernel");
89 if (kmdp == NULL)
90 kmdp = preload_search_by_type("elf64 kernel");
91 vbefb = (struct vbe_fb *)preload_search_info(kmdp,
92 MODINFO_METADATA | MODINFOMD_VBE_FB);
93 if (vbefb == NULL)
94 return (CN_DEAD);
95
96 return (CN_INTERNAL);
97 }
98
99 static int
vt_vbefb_init(struct vt_device * vd)100 vt_vbefb_init(struct vt_device *vd)
101 {
102 struct fb_info *info;
103 struct vbe_fb *vbefb;
104 caddr_t kmdp;
105 int format, roff, goff, boff;
106
107 info = vd->vd_softc;
108 if (info == NULL)
109 info = vd->vd_softc = (void *)&local_vbe_info;
110
111 kmdp = preload_search_by_type("elf kernel");
112 if (kmdp == NULL)
113 kmdp = preload_search_by_type("elf64 kernel");
114 vbefb = (struct vbe_fb *)preload_search_info(kmdp,
115 MODINFO_METADATA | MODINFOMD_VBE_FB);
116 if (vbefb == NULL)
117 return (CN_DEAD);
118
119 info->fb_height = vbefb->fb_height;
120 info->fb_width = vbefb->fb_width;
121
122 info->fb_depth = vbefb->fb_bpp;
123 /* Round to a multiple of the bits in a byte. */
124 info->fb_bpp = roundup2(vbefb->fb_bpp, NBBY);
125
126 /* Stride in bytes, not pixels */
127 info->fb_stride = vbefb->fb_stride * (info->fb_bpp / NBBY);
128
129 if (info->fb_depth == 8)
130 format = COLOR_FORMAT_VGA;
131 else
132 format = COLOR_FORMAT_RGB;
133
134 roff = ffs(vbefb->fb_mask_red) - 1;
135 goff = ffs(vbefb->fb_mask_green) - 1;
136 boff = ffs(vbefb->fb_mask_blue) - 1;
137 vt_config_cons_colors(info, format,
138 vbefb->fb_mask_red >> roff, roff,
139 vbefb->fb_mask_green >> goff, goff,
140 vbefb->fb_mask_blue >> boff, boff);
141
142 /* Mark cmap initialized. */
143 info->fb_cmsize = NCOLORS;
144
145 info->fb_size = info->fb_height * info->fb_stride;
146 info->fb_pbase = vbefb->fb_addr;
147 info->fb_vbase = (intptr_t)pmap_mapdev_attr(info->fb_pbase,
148 info->fb_size, VM_MEMATTR_WRITE_COMBINING);
149
150 vt_fb_init(vd);
151
152 return (CN_INTERNAL);
153 }
154
155 static void
vt_vbefb_fini(struct vt_device * vd,void * softc)156 vt_vbefb_fini(struct vt_device *vd, void *softc)
157 {
158 struct fb_info *info = softc;
159
160 vt_fb_fini(vd, softc);
161 pmap_unmapdev((void *)info->fb_vbase, info->fb_size);
162 }
163