1/*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2014 The FreeBSD Foundation 5 * Copyright (c) 2021 Andrew Turner 6 * 7 * Portions of this software was developed by Aleksandr Rybalko under 8 * sponsorship from the 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/param.h> 33#include <sys/systm.h> 34#include <sys/kernel.h> 35#include <sys/fbio.h> 36 37#include <vm/vm.h> 38#include <vm/pmap.h> 39 40#include <dev/vt/vt.h> 41#include <dev/vt/hw/fb/vt_fb.h> 42#include <dev/vt/colors/vt_termcolors.h> 43 44#include <dev/ofw/openfirm.h> 45#include <dev/ofw/ofw_bus.h> 46#include <dev/ofw/ofw_subr.h> 47#include <dev/ofw/ofw_bus_subr.h> 48 49static vd_init_t vt_simplefb_init; 50static vd_fini_t vt_simplefb_fini; 51static vd_probe_t vt_simplefb_probe; 52 53static struct vt_driver vt_simplefb_driver = { 54 .vd_name = "simplefb", 55 .vd_probe = vt_simplefb_probe, 56 .vd_init = vt_simplefb_init, 57 .vd_fini = vt_simplefb_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_drawrect = vt_fb_drawrect, 63 .vd_setpixel = vt_fb_setpixel, 64 .vd_fb_ioctl = vt_fb_ioctl, 65 .vd_fb_mmap = vt_fb_mmap, 66 .vd_suspend = vt_suspend, 67 .vd_resume = vt_resume, 68 /* Better than efifb, but still generic driver. */ 69 .vd_priority = VD_PRIORITY_GENERIC + 2, 70}; 71 72struct { 73 const char *name; 74 int rbits, rshift; 75 int gbits, gshift; 76 int bbits, bshift; 77 int depth; 78 enum vt_color_format format; 79} simplefb_formats[] = { 80 { 81 .name = "r5g6b5", 82 .rbits = 5, .rshift = 11, 83 .gbits = 6, .gshift = 5, 84 .bbits = 5, .bshift = 0, 85 .depth = 16, .format = COLOR_FORMAT_RGB, 86 }, 87 { 88 .name = "r8g8b8", 89 .rbits = 8, .rshift = 16, 90 .gbits = 8, .gshift = 8, 91 .bbits = 8, .bshift = 0, 92 .depth = 24, .format = COLOR_FORMAT_RGB, 93 }, 94 { 95 .name = "a8r8g8b8", 96 .rbits = 8, .rshift = 16, 97 .gbits = 8, .gshift = 8, 98 .bbits = 8, .bshift = 0, 99 .depth = 32, .format = COLOR_FORMAT_RGB, 100 }, 101 { 102 .name = "x8r8g8b8", 103 .rbits = 8, .rshift = 16, 104 .gbits = 8, .gshift = 8, 105 .bbits = 8, .bshift = 0, 106 .depth = 32, .format = COLOR_FORMAT_RGB, 107 }, 108 { 109 .name = "x2r10g10b10", 110 .rbits = 10, .rshift = 20, 111 .gbits = 10, .gshift = 10, 112 .bbits = 10, .bshift = 0, 113 .depth = 32, .format = COLOR_FORMAT_RGB, 114 }, 115}; 116 117static struct fb_info local_info; 118VT_DRIVER_DECLARE(vt_simplefb, vt_simplefb_driver); 119 120static bool 121vt_simplefb_node(phandle_t *nodep) 122{ 123 phandle_t chosen, node; 124 125 chosen = OF_finddevice("/chosen"); 126 if (chosen == -1) 127 return (false); 128 129 for (node = OF_child(chosen); node != 0; node = OF_peer(node)) { 130 if (ofw_bus_node_is_compatible(node, "simple-framebuffer")) 131 break; 132 } 133 if (node == 0) 134 return (false); 135 136 if (nodep != NULL) 137 *nodep = node; 138 139 return (true); 140} 141 142static int 143vt_simplefb_probe(struct vt_device *vd) 144{ 145 int disabled; 146 147 disabled = 0; 148 TUNABLE_INT_FETCH("hw.syscons.disable", &disabled); 149 if (disabled != 0) 150 return (CN_DEAD); 151 152 if (!vt_simplefb_node(NULL)) 153 return (CN_DEAD); 154 155 return (CN_INTERNAL); 156} 157 158static int 159vt_simplefb_init(struct vt_device *vd) 160{ 161 char format[16]; 162 pcell_t height, width, stride; 163 struct fb_info *sc; 164 phandle_t node; 165 bus_size_t size; 166 int error; 167 168 /* Initialize softc */ 169 vd->vd_softc = sc = &local_info; 170 171 if (!vt_simplefb_node(&node)) 172 return (CN_DEAD); 173 174 if (OF_getencprop(node, "height", &height, sizeof(height)) == -1 || 175 OF_getencprop(node, "width", &width, sizeof(width)) == -1 || 176 OF_getencprop(node, "stride", &stride, sizeof(stride)) == -1 || 177 OF_getprop(node, "format", format, sizeof(format)) == -1) { 178 return (CN_DEAD); 179 } 180 181 sc->fb_height = height; 182 sc->fb_width = width; 183 sc->fb_stride = stride; 184 sc->fb_cmsize = NCOLORS; 185 186 error = 1; 187 for (int i = 0; i < nitems(simplefb_formats); i++) { 188 if (strcmp(format, simplefb_formats[i].name) == 0) { 189 vt_config_cons_colors(sc, 190 simplefb_formats[i].format, 191 (1 << simplefb_formats[i].rbits) - 1, 192 simplefb_formats[i].rshift, 193 (1 << simplefb_formats[i].gbits) - 1, 194 simplefb_formats[i].gshift, 195 (1 << simplefb_formats[i].bbits) - 1, 196 simplefb_formats[i].bshift); 197 sc->fb_depth = sc->fb_bpp = simplefb_formats[i].depth; 198 error = 0; 199 break; 200 } 201 } 202 if (error != 0) 203 return (CN_DEAD); 204 205 ofw_reg_to_paddr(node, 0, &sc->fb_pbase, &size, NULL); 206 sc->fb_vbase = (intptr_t)pmap_mapdev_attr(sc->fb_pbase, 207 size, VM_MEMATTR_WRITE_COMBINING); 208 sc->fb_size = size; 209 210 vt_fb_init(vd); 211 212 return (CN_INTERNAL); 213} 214 215static void 216vt_simplefb_fini(struct vt_device *vd, void *softc) 217{ 218 struct fb_info *sc; 219 220 sc = softc; 221 vt_fb_fini(vd, softc); 222 pmap_unmapdev((void *)sc->fb_vbase, sc->fb_size); 223} 224