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 * $FreeBSD$ 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/vm.h> 45 #include <machine/vmparam.h> 46 #include <vm/vm.h> 47 #include <vm/pmap.h> 48 #include <machine/pmap.h> 49 50 #include <dev/vt/vt.h> 51 #include <dev/vt/hw/fb/vt_fb.h> 52 #include <dev/vt/colors/vt_termcolors.h> 53 54 static vd_init_t vt_efifb_init; 55 static vd_probe_t vt_efifb_probe; 56 57 static struct vt_driver vt_efifb_driver = { 58 .vd_name = "efifb", 59 .vd_probe = vt_efifb_probe, 60 .vd_init = vt_efifb_init, 61 .vd_blank = vt_fb_blank, 62 .vd_bitbltchr = vt_fb_bitbltchr, 63 .vd_maskbitbltchr = vt_fb_maskbitbltchr, 64 /* Better than VGA, but still generic driver. */ 65 .vd_priority = VD_PRIORITY_GENERIC + 1, 66 }; 67 68 static struct fb_info local_info; 69 VT_DRIVER_DECLARE(vt_efifb, vt_efifb_driver); 70 71 static int 72 vt_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 94 static int 95 vt_efifb_init(struct vt_device *vd) 96 { 97 int depth, d, i, len; 98 struct fb_info *info; 99 struct efi_fb *efifb; 100 caddr_t kmdp; 101 102 info = vd->vd_softc; 103 if (info == NULL) 104 info = vd->vd_softc = (void *)&local_info; 105 106 kmdp = preload_search_by_type("elf kernel"); 107 if (kmdp == NULL) 108 kmdp = preload_search_by_type("elf64 kernel"); 109 efifb = (struct efi_fb *)preload_search_info(kmdp, 110 MODINFO_METADATA | MODINFOMD_EFI_FB); 111 if (efifb == NULL) 112 return (CN_DEAD); 113 114 info->fb_height = efifb->fb_height; 115 info->fb_width = efifb->fb_width; 116 117 depth = fls(efifb->fb_mask_red); 118 d = fls(efifb->fb_mask_green); 119 depth = d > depth ? d : depth; 120 d = fls(efifb->fb_mask_blue); 121 depth = d > depth ? d : depth; 122 d = fls(efifb->fb_mask_reserved); 123 depth = d > depth ? d : depth; 124 info->fb_depth = depth; 125 126 info->fb_stride = efifb->fb_stride * (depth / 8); 127 128 vt_generate_vga_palette(info->fb_cmap, COLOR_FORMAT_RGB, 129 efifb->fb_mask_red, ffs(efifb->fb_mask_red) - 1, 130 efifb->fb_mask_green, ffs(efifb->fb_mask_green) - 1, 131 efifb->fb_mask_blue, ffs(efifb->fb_mask_blue) - 1); 132 133 info->fb_size = info->fb_height * info->fb_stride; 134 info->fb_pbase = efifb->fb_addr; 135 /* 136 * We could use pmap_mapdev here except that the kernel pmap 137 * hasn't been created yet and hence any attempt to lock it will 138 * fail. 139 */ 140 info->fb_vbase = PHYS_TO_DMAP(efifb->fb_addr); 141 142 /* blank full size */ 143 len = info->fb_size / 4; 144 for (i = 0; i < len; i++) { 145 ((uint32_t *)info->fb_vbase)[i] = 0; 146 } 147 148 /* Get pixel storage size. */ 149 info->fb_bpp = info->fb_stride / info->fb_width * 8; 150 151 /* 152 * Early FB driver work with static window buffer, so reduce to minimal 153 * size, buffer or screen. 154 */ 155 info->fb_width = MIN(info->fb_width, VT_FB_DEFAULT_WIDTH); 156 info->fb_height = MIN(info->fb_height, VT_FB_DEFAULT_HEIGHT); 157 158 fb_probe(info); 159 vt_fb_init(vd); 160 161 /* Clear the screen. */ 162 vt_fb_blank(vd, TC_BLACK); 163 164 return (CN_INTERNAL); 165 } 166