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
49 static vd_init_t vt_simplefb_init;
50 static vd_fini_t vt_simplefb_fini;
51 static vd_probe_t vt_simplefb_probe;
52 static vd_bitblt_argb_t vt_simplefb_bitblt_argb;
53
54 static struct vt_driver vt_simplefb_driver = {
55 .vd_name = "simplefb",
56 .vd_probe = vt_simplefb_probe,
57 .vd_init = vt_simplefb_init,
58 .vd_fini = vt_simplefb_fini,
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_bitblt_argb = vt_simplefb_bitblt_argb,
64 .vd_drawrect = vt_fb_drawrect,
65 .vd_setpixel = vt_fb_setpixel,
66 .vd_fb_ioctl = vt_fb_ioctl,
67 .vd_fb_mmap = vt_fb_mmap,
68 .vd_suspend = vt_suspend,
69 .vd_resume = vt_resume,
70 /* Better than efifb, but still generic driver. */
71 .vd_priority = VD_PRIORITY_GENERIC + 2,
72 };
73
74 struct {
75 const char *name;
76 int rbits, rshift;
77 int gbits, gshift;
78 int bbits, bshift;
79 int depth;
80 enum vt_color_format format;
81 } simplefb_formats[] = {
82 {
83 .name = "r5g6b5",
84 .rbits = 5, .rshift = 11,
85 .gbits = 6, .gshift = 5,
86 .bbits = 5, .bshift = 0,
87 .depth = 16, .format = COLOR_FORMAT_RGB,
88 },
89 {
90 .name = "r8g8b8",
91 .rbits = 8, .rshift = 16,
92 .gbits = 8, .gshift = 8,
93 .bbits = 8, .bshift = 0,
94 .depth = 24, .format = COLOR_FORMAT_RGB,
95 },
96 {
97 .name = "a8r8g8b8",
98 .rbits = 8, .rshift = 16,
99 .gbits = 8, .gshift = 8,
100 .bbits = 8, .bshift = 0,
101 .depth = 32, .format = COLOR_FORMAT_RGB,
102 },
103 {
104 .name = "x8r8g8b8",
105 .rbits = 8, .rshift = 16,
106 .gbits = 8, .gshift = 8,
107 .bbits = 8, .bshift = 0,
108 .depth = 32, .format = COLOR_FORMAT_RGB,
109 },
110 {
111 .name = "x2r10g10b10",
112 .rbits = 10, .rshift = 20,
113 .gbits = 10, .gshift = 10,
114 .bbits = 10, .bshift = 0,
115 .depth = 32, .format = COLOR_FORMAT_RGB,
116 },
117 };
118
119 static struct fb_info local_info;
120 VT_DRIVER_DECLARE(vt_simplefb, vt_simplefb_driver);
121
122 static bool
vt_simplefb_node(phandle_t * nodep)123 vt_simplefb_node(phandle_t *nodep)
124 {
125 phandle_t chosen, node;
126
127 chosen = OF_finddevice("/chosen");
128 if (chosen == -1)
129 return (false);
130
131 for (node = OF_child(chosen); node != 0; node = OF_peer(node)) {
132 if (ofw_bus_node_is_compatible(node, "simple-framebuffer"))
133 break;
134 }
135 if (node == 0)
136 return (false);
137
138 if (nodep != NULL)
139 *nodep = node;
140
141 return (true);
142 }
143
144 static int
vt_simplefb_probe(struct vt_device * vd)145 vt_simplefb_probe(struct vt_device *vd)
146 {
147 int disabled;
148
149 disabled = 0;
150 TUNABLE_INT_FETCH("hw.syscons.disable", &disabled);
151 if (disabled != 0)
152 return (CN_DEAD);
153
154 if (!vt_simplefb_node(NULL))
155 return (CN_DEAD);
156
157 return (CN_INTERNAL);
158 }
159
160 static int
vt_simplefb_init(struct vt_device * vd)161 vt_simplefb_init(struct vt_device *vd)
162 {
163 char format[16];
164 pcell_t height, width, stride;
165 struct fb_info *sc;
166 phandle_t node;
167 bus_size_t size;
168 int error;
169
170 /* Initialize softc */
171 vd->vd_softc = sc = &local_info;
172
173 if (!vt_simplefb_node(&node))
174 return (CN_DEAD);
175
176 if (OF_getencprop(node, "height", &height, sizeof(height)) == -1 ||
177 OF_getencprop(node, "width", &width, sizeof(width)) == -1 ||
178 OF_getencprop(node, "stride", &stride, sizeof(stride)) == -1 ||
179 OF_getprop(node, "format", format, sizeof(format)) == -1) {
180 return (CN_DEAD);
181 }
182
183 sc->fb_height = height;
184 sc->fb_width = width;
185 sc->fb_stride = stride;
186 sc->fb_cmsize = NCOLORS;
187
188 error = 1;
189 for (int i = 0; i < nitems(simplefb_formats); i++) {
190 if (strcmp(format, simplefb_formats[i].name) == 0) {
191 vt_config_cons_colors(sc,
192 simplefb_formats[i].format,
193 (1 << simplefb_formats[i].rbits) - 1,
194 simplefb_formats[i].rshift,
195 (1 << simplefb_formats[i].gbits) - 1,
196 simplefb_formats[i].gshift,
197 (1 << simplefb_formats[i].bbits) - 1,
198 simplefb_formats[i].bshift);
199 sc->fb_depth = sc->fb_bpp = simplefb_formats[i].depth;
200 error = 0;
201 break;
202 }
203 }
204 if (error != 0)
205 return (CN_DEAD);
206
207 ofw_reg_to_paddr(node, 0, &sc->fb_pbase, &size, NULL);
208 sc->fb_vbase = (intptr_t)pmap_mapdev_attr(sc->fb_pbase,
209 size, VM_MEMATTR_WRITE_COMBINING);
210 sc->fb_size = size;
211
212 vt_fb_init(vd);
213
214 return (CN_INTERNAL);
215 }
216
217 static void
vt_simplefb_fini(struct vt_device * vd,void * softc)218 vt_simplefb_fini(struct vt_device *vd, void *softc)
219 {
220 struct fb_info *sc;
221
222 sc = softc;
223 vt_fb_fini(vd, softc);
224 pmap_unmapdev((void *)sc->fb_vbase, sc->fb_size);
225 }
226
227 static int
vt_simplefb_bitblt_argb(struct vt_device * vd,const struct vt_window * vw,const uint8_t * argb,unsigned int width,unsigned int height,unsigned int x,unsigned int y)228 vt_simplefb_bitblt_argb(struct vt_device *vd, const struct vt_window *vw,
229 const uint8_t *argb,
230 unsigned int width, unsigned int height,
231 unsigned int x, unsigned int y)
232 {
233
234 return (EOPNOTSUPP);
235 }
236