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/cdefs.h>
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/fbio.h>
37
38 #include <vm/vm.h>
39 #include <vm/pmap.h>
40
41 #include <dev/vt/vt.h>
42 #include <dev/vt/hw/fb/vt_fb.h>
43 #include <dev/vt/colors/vt_termcolors.h>
44
45 #include <dev/ofw/openfirm.h>
46 #include <dev/ofw/ofw_bus.h>
47 #include <dev/ofw/ofw_subr.h>
48 #include <dev/ofw/ofw_bus_subr.h>
49
50 static vd_init_t vt_simplefb_init;
51 static vd_fini_t vt_simplefb_fini;
52 static vd_probe_t vt_simplefb_probe;
53 static vd_bitblt_argb_t vt_simplefb_bitblt_argb;
54
55 static struct vt_driver vt_simplefb_driver = {
56 .vd_name = "simplefb",
57 .vd_probe = vt_simplefb_probe,
58 .vd_init = vt_simplefb_init,
59 .vd_fini = vt_simplefb_fini,
60 .vd_blank = vt_fb_blank,
61 .vd_bitblt_text = vt_fb_bitblt_text,
62 .vd_invalidate_text = vt_fb_invalidate_text,
63 .vd_bitblt_bmp = vt_fb_bitblt_bitmap,
64 .vd_bitblt_argb = vt_simplefb_bitblt_argb,
65 .vd_drawrect = vt_fb_drawrect,
66 .vd_setpixel = vt_fb_setpixel,
67 .vd_fb_ioctl = vt_fb_ioctl,
68 .vd_fb_mmap = vt_fb_mmap,
69 .vd_suspend = vt_suspend,
70 .vd_resume = vt_resume,
71 /* Better than efifb, but still generic driver. */
72 .vd_priority = VD_PRIORITY_GENERIC + 2,
73 };
74
75 struct {
76 const char *name;
77 int rbits, rshift;
78 int gbits, gshift;
79 int bbits, bshift;
80 int depth;
81 enum vt_color_format format;
82 } simplefb_formats[] = {
83 {
84 .name = "r5g6b5",
85 .rbits = 5, .rshift = 11,
86 .gbits = 6, .gshift = 5,
87 .bbits = 5, .bshift = 0,
88 .depth = 16, .format = COLOR_FORMAT_RGB,
89 },
90 {
91 .name = "r8g8b8",
92 .rbits = 8, .rshift = 16,
93 .gbits = 8, .gshift = 8,
94 .bbits = 8, .bshift = 0,
95 .depth = 24, .format = COLOR_FORMAT_RGB,
96 },
97 {
98 .name = "a8r8g8b8",
99 .rbits = 8, .rshift = 16,
100 .gbits = 8, .gshift = 8,
101 .bbits = 8, .bshift = 0,
102 .depth = 32, .format = COLOR_FORMAT_RGB,
103 },
104 {
105 .name = "x8r8g8b8",
106 .rbits = 8, .rshift = 16,
107 .gbits = 8, .gshift = 8,
108 .bbits = 8, .bshift = 0,
109 .depth = 32, .format = COLOR_FORMAT_RGB,
110 },
111 {
112 .name = "x2r10g10b10",
113 .rbits = 10, .rshift = 20,
114 .gbits = 10, .gshift = 10,
115 .bbits = 10, .bshift = 0,
116 .depth = 32, .format = COLOR_FORMAT_RGB,
117 },
118 };
119
120 static struct fb_info local_info;
121 VT_DRIVER_DECLARE(vt_simplefb, vt_simplefb_driver);
122
123 static bool
vt_simplefb_node(phandle_t * nodep)124 vt_simplefb_node(phandle_t *nodep)
125 {
126 phandle_t chosen, node;
127
128 chosen = OF_finddevice("/chosen");
129 if (chosen == -1)
130 return (false);
131
132 for (node = OF_child(chosen); node != 0; node = OF_peer(node)) {
133 if (ofw_bus_node_is_compatible(node, "simple-framebuffer"))
134 break;
135 }
136 if (node == 0)
137 return (false);
138
139 if (nodep != NULL)
140 *nodep = node;
141
142 return (true);
143 }
144
145 static int
vt_simplefb_probe(struct vt_device * vd)146 vt_simplefb_probe(struct vt_device *vd)
147 {
148 int disabled;
149
150 disabled = 0;
151 TUNABLE_INT_FETCH("hw.syscons.disable", &disabled);
152 if (disabled != 0)
153 return (CN_DEAD);
154
155 if (!vt_simplefb_node(NULL))
156 return (CN_DEAD);
157
158 return (CN_INTERNAL);
159 }
160
161 static int
vt_simplefb_init(struct vt_device * vd)162 vt_simplefb_init(struct vt_device *vd)
163 {
164 char format[16];
165 pcell_t height, width, stride;
166 struct fb_info *sc;
167 phandle_t node;
168 bus_size_t size;
169 int error;
170
171 /* Initialize softc */
172 vd->vd_softc = sc = &local_info;
173
174 if (!vt_simplefb_node(&node))
175 return (CN_DEAD);
176
177 if (OF_getencprop(node, "height", &height, sizeof(height)) == -1 ||
178 OF_getencprop(node, "width", &width, sizeof(width)) == -1 ||
179 OF_getencprop(node, "stride", &stride, sizeof(stride)) == -1 ||
180 OF_getprop(node, "format", format, sizeof(format)) == -1) {
181 return (CN_DEAD);
182 }
183
184 sc->fb_height = height;
185 sc->fb_width = width;
186 sc->fb_stride = stride;
187 sc->fb_cmsize = NCOLORS;
188
189 error = 1;
190 for (int i = 0; i < nitems(simplefb_formats); i++) {
191 if (strcmp(format, simplefb_formats[i].name) == 0) {
192 vt_config_cons_colors(sc,
193 simplefb_formats[i].format,
194 (1 << simplefb_formats[i].rbits) - 1,
195 simplefb_formats[i].rshift,
196 (1 << simplefb_formats[i].gbits) - 1,
197 simplefb_formats[i].gshift,
198 (1 << simplefb_formats[i].bbits) - 1,
199 simplefb_formats[i].bshift);
200 sc->fb_depth = sc->fb_bpp = simplefb_formats[i].depth;
201 error = 0;
202 break;
203 }
204 }
205 if (error != 0)
206 return (CN_DEAD);
207
208 ofw_reg_to_paddr(node, 0, &sc->fb_pbase, &size, NULL);
209 sc->fb_vbase = (intptr_t)pmap_mapdev_attr(sc->fb_pbase,
210 size, VM_MEMATTR_WRITE_COMBINING);
211 sc->fb_size = size;
212
213 vt_fb_init(vd);
214
215 return (CN_INTERNAL);
216 }
217
218 static void
vt_simplefb_fini(struct vt_device * vd,void * softc)219 vt_simplefb_fini(struct vt_device *vd, void *softc)
220 {
221 struct fb_info *sc;
222
223 sc = softc;
224 vt_fb_fini(vd, softc);
225 pmap_unmapdev((void *)sc->fb_vbase, sc->fb_size);
226 }
227
228 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)229 vt_simplefb_bitblt_argb(struct vt_device *vd, const struct vt_window *vw,
230 const uint8_t *argb,
231 unsigned int width, unsigned int height,
232 unsigned int x, unsigned int y)
233 {
234
235 return (EOPNOTSUPP);
236 }
237