2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
5 * Copyright (c) 2012, 2013 The FreeBSD Foundation
8 * Portions of this software were developed by Oleksandr Rybalko
9 * under sponsorship from the FreeBSD Foundation.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <sys/param.h>
37 #include <sys/systm.h>
41 #include <sys/kernel.h>
42 #include <sys/malloc.h>
43 #include <sys/module.h>
48 #include <dev/ofw/ofw_bus.h>
49 #include <dev/ofw/ofw_bus_subr.h>
51 #include <dev/fb/fbreg.h>
52 #include <dev/vt/vt.h>
53 #include <dev/vt/colors/vt_termcolors.h>
55 #include <arm/broadcom/bcm2835/bcm2835_mbox_prop.h>
65 struct bcm2835_fb_config fb;
69 static struct ofw_compat_data compat_data[] = {
70 {"broadcom,bcm2835-fb", 1},
71 {"brcm,bcm2708-fb", 1},
75 static int bcm_fb_probe(device_t);
76 static int bcm_fb_attach(device_t);
79 bcm_fb_init(struct bcmsc_softc *sc, struct bcm2835_fb_config *fb)
85 memset(fb, 0, sizeof(*fb));
86 if (bcm2835_mbox_fb_get_w_h(fb) != 0)
88 if (bcm2835_mbox_fb_get_bpp(fb) != 0)
90 if (fb->bpp < FB_DEPTH) {
91 device_printf(sc->dev, "changing fb bpp from %d to %d\n", fb->bpp, FB_DEPTH);
94 device_printf(sc->dev, "keeping existing fb bpp of %d\n", fb->bpp);
98 fb->xoffset = fb->yoffset = 0;
100 if ((err = bcm2835_mbox_fb_init(fb)) != 0) {
101 device_printf(sc->dev, "bcm2835_mbox_fb_init failed, err=%d\n", err);
109 bcm_fb_setup_fbd(struct bcmsc_softc *sc)
111 struct bcm2835_fb_config fb;
115 err = bcm_fb_init(sc, &fb);
119 memset(&sc->info, 0, sizeof(sc->info));
120 sc->info.fb_name = device_get_nameunit(sc->dev);
122 sc->info.fb_vbase = (intptr_t)pmap_mapdev(fb.base, fb.size);
123 sc->info.fb_pbase = fb.base;
124 sc->info.fb_size = fb.size;
125 sc->info.fb_bpp = sc->info.fb_depth = fb.bpp;
126 sc->info.fb_stride = fb.pitch;
127 sc->info.fb_width = fb.xres;
128 sc->info.fb_height = fb.yres;
129 #ifdef VM_MEMATTR_WRITE_COMBINING
130 sc->info.fb_flags = FB_FLAG_MEMATTR;
131 sc->info.fb_memattr = VM_MEMATTR_WRITE_COMBINING;
135 switch (sc->info.fb_bpp) {
137 vt_generate_cons_palette(sc->info.fb_cmap,
138 COLOR_FORMAT_RGB, 0xff, 0, 0xff, 8, 0xff, 16);
139 sc->info.fb_cmsize = 16;
142 vt_generate_cons_palette(sc->info.fb_cmap,
143 COLOR_FORMAT_RGB, 0xff, 16, 0xff, 8, 0xff, 0);
144 sc->info.fb_cmsize = 16;
149 fbd = device_add_child(sc->dev, "fbd", device_get_unit(sc->dev));
151 device_printf(sc->dev, "Failed to add fbd child\n");
152 pmap_unmapdev(sc->info.fb_vbase, sc->info.fb_size);
154 } else if (device_probe_and_attach(fbd) != 0) {
155 device_printf(sc->dev, "Failed to attach fbd device\n");
156 device_delete_child(sc->dev, fbd);
157 pmap_unmapdev(sc->info.fb_vbase, sc->info.fb_size);
161 device_printf(sc->dev, "%dx%d(%dx%d@%d,%d) %dbpp\n", fb.xres, fb.yres,
162 fb.vxres, fb.vyres, fb.xoffset, fb.yoffset, fb.bpp);
163 device_printf(sc->dev,
164 "fbswap: %d, pitch %d, base 0x%08x, screen_size %d\n",
165 sc->fbswap, fb.pitch, fb.base, fb.size);
171 bcm_fb_resync_sysctl(SYSCTL_HANDLER_ARGS)
173 struct bcmsc_softc *sc = arg1;
174 struct bcm2835_fb_config fb;
179 err = sysctl_handle_int(oidp, &val, 0, req);
180 if (err || !req->newptr) /* error || read request */
183 bcm_fb_init(sc, &fb);
189 bcm_fb_sysctl_init(struct bcmsc_softc *sc)
191 struct sysctl_ctx_list *ctx;
192 struct sysctl_oid *tree_node;
193 struct sysctl_oid_list *tree;
196 * Add system sysctl tree/handlers.
198 ctx = device_get_sysctl_ctx(sc->dev);
199 tree_node = device_get_sysctl_tree(sc->dev);
200 tree = SYSCTL_CHILDREN(tree_node);
201 SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "resync",
202 CTLFLAG_RW | CTLTYPE_UINT | CTLFLAG_NEEDGIANT, sc, sizeof(*sc),
203 bcm_fb_resync_sysctl, "IU", "Set to resync framebuffer with VC");
207 bcm_fb_probe(device_t dev)
210 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
213 device_set_desc(dev, "BCM2835 VT framebuffer driver");
215 return (BUS_PROBE_DEFAULT);
219 bcm_fb_attach(device_t dev)
221 char bootargs[2048], *n, *p, *v;
224 struct bcmsc_softc *sc;
226 sc = device_get_softc(dev);
229 /* Newer firmware versions needs an inverted color palette. */
231 chosen = OF_finddevice("/chosen");
233 OF_getprop(chosen, "bootargs", &bootargs, sizeof(bootargs)) > 0) {
235 while ((v = strsep(&p, " ")) != NULL) {
239 if (strcmp(n, "bcm2708_fb.fbswap") == 0 && v != NULL)
245 bcm_fb_sysctl_init(sc);
247 err = bcm_fb_setup_fbd(sc);
254 static struct fb_info *
255 bcm_fb_helper_getinfo(device_t dev)
257 struct bcmsc_softc *sc;
259 sc = device_get_softc(dev);
264 static device_method_t bcm_fb_methods[] = {
265 /* Device interface */
266 DEVMETHOD(device_probe, bcm_fb_probe),
267 DEVMETHOD(device_attach, bcm_fb_attach),
269 /* Framebuffer service methods */
270 DEVMETHOD(fb_getinfo, bcm_fb_helper_getinfo),
275 static devclass_t bcm_fb_devclass;
277 static driver_t bcm_fb_driver = {
280 sizeof(struct bcmsc_softc),
283 DRIVER_MODULE(bcm2835fb, ofwbus, bcm_fb_driver, bcm_fb_devclass, 0, 0);
284 DRIVER_MODULE(bcm2835fb, simplebus, bcm_fb_driver, bcm_fb_devclass, 0, 0);