1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2014 The FreeBSD Foundation 5 * All rights reserved. 6 * 7 * This software was developed by Aleksandr Rybalko under sponsorship from the 8 * FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/fbio.h> 39 #include <sys/linker.h> 40 41 #include "opt_platform.h" 42 43 #include <machine/metadata.h> 44 #include <machine/vmparam.h> 45 #include <vm/vm.h> 46 #include <vm/pmap.h> 47 48 #include <dev/vt/vt.h> 49 #include <dev/vt/hw/fb/vt_fb.h> 50 #include <dev/vt/colors/vt_termcolors.h> 51 52 static vd_init_t vt_vbefb_init; 53 static vd_probe_t vt_vbefb_probe; 54 55 static struct vt_driver vt_vbefb_driver = { 56 .vd_name = "vbefb", 57 .vd_probe = vt_vbefb_probe, 58 .vd_init = vt_vbefb_init, 59 .vd_blank = vt_fb_blank, 60 .vd_bitblt_text = vt_fb_bitblt_text, 61 .vd_invalidate_text = vt_fb_invalidate_text, 62 .vd_bitblt_bmp = vt_fb_bitblt_bitmap, 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 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 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_generate_cons_palette(info->fb_cmap, 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