/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2012 Oleksandr Tymoshenko * Copyright (c) 2012, 2013 The FreeBSD Foundation * All rights reserved. * * Portions of this software were developed by Oleksandr Rybalko * under sponsorship from the FreeBSD Foundation. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "fb_if.h" #include "mbox_if.h" #define FB_DEPTH 24 struct bcmsc_softc { struct fb_info info; int fbswap; struct bcm2835_fb_config fb; device_t dev; }; static struct ofw_compat_data compat_data[] = { {"broadcom,bcm2835-fb", 1}, {"brcm,bcm2708-fb", 1}, {NULL, 0} }; static int bcm_fb_probe(device_t); static int bcm_fb_attach(device_t); static int bcm_fb_init(struct bcmsc_softc *sc, struct bcm2835_fb_config *fb) { int err; err = 0; memset(fb, 0, sizeof(*fb)); if (bcm2835_mbox_fb_get_w_h(fb) != 0) return (ENXIO); if (bcm2835_mbox_fb_get_bpp(fb) != 0) return (ENXIO); if (fb->bpp < FB_DEPTH) { device_printf(sc->dev, "changing fb bpp from %d to %d\n", fb->bpp, FB_DEPTH); fb->bpp = FB_DEPTH; } else device_printf(sc->dev, "keeping existing fb bpp of %d\n", fb->bpp); fb->vxres = fb->xres; fb->vyres = fb->yres; fb->xoffset = fb->yoffset = 0; if ((err = bcm2835_mbox_fb_init(fb)) != 0) { device_printf(sc->dev, "bcm2835_mbox_fb_init failed, err=%d\n", err); return (ENXIO); } return (0); } static int bcm_fb_setup_fbd(struct bcmsc_softc *sc) { struct bcm2835_fb_config fb; device_t fbd; int err; err = bcm_fb_init(sc, &fb); if (err) return (err); memset(&sc->info, 0, sizeof(sc->info)); sc->info.fb_name = device_get_nameunit(sc->dev); sc->info.fb_vbase = (intptr_t)pmap_mapdev(fb.base, fb.size); sc->info.fb_pbase = fb.base; sc->info.fb_size = fb.size; sc->info.fb_bpp = sc->info.fb_depth = fb.bpp; sc->info.fb_stride = fb.pitch; sc->info.fb_width = fb.xres; sc->info.fb_height = fb.yres; #ifdef VM_MEMATTR_WRITE_COMBINING sc->info.fb_flags = FB_FLAG_MEMATTR; sc->info.fb_memattr = VM_MEMATTR_WRITE_COMBINING; #endif if (sc->fbswap) { switch (sc->info.fb_bpp) { case 24: vt_config_cons_colors(&sc->info, COLOR_FORMAT_RGB, 0xff, 0, 0xff, 8, 0xff, 16); sc->info.fb_cmsize = 16; break; case 32: vt_config_cons_colors(&sc->info, COLOR_FORMAT_RGB, 0xff, 16, 0xff, 8, 0xff, 0); sc->info.fb_cmsize = 16; break; } } fbd = device_add_child(sc->dev, "fbd", device_get_unit(sc->dev)); if (fbd == NULL) { device_printf(sc->dev, "Failed to add fbd child\n"); pmap_unmapdev((void *)sc->info.fb_vbase, sc->info.fb_size); return (ENXIO); } else if (device_probe_and_attach(fbd) != 0) { device_printf(sc->dev, "Failed to attach fbd device\n"); device_delete_child(sc->dev, fbd); pmap_unmapdev((void *)sc->info.fb_vbase, sc->info.fb_size); return (ENXIO); } device_printf(sc->dev, "%dx%d(%dx%d@%d,%d) %dbpp\n", fb.xres, fb.yres, fb.vxres, fb.vyres, fb.xoffset, fb.yoffset, fb.bpp); device_printf(sc->dev, "fbswap: %d, pitch %d, base 0x%08x, screen_size %d\n", sc->fbswap, fb.pitch, fb.base, fb.size); return (0); } static int bcm_fb_resync_sysctl(SYSCTL_HANDLER_ARGS) { struct bcmsc_softc *sc = arg1; struct bcm2835_fb_config fb; int val; int err; val = 0; err = sysctl_handle_int(oidp, &val, 0, req); if (err || !req->newptr) /* error || read request */ return (err); bcm_fb_init(sc, &fb); return (0); } static void bcm_fb_sysctl_init(struct bcmsc_softc *sc) { struct sysctl_ctx_list *ctx; struct sysctl_oid *tree_node; struct sysctl_oid_list *tree; /* * Add system sysctl tree/handlers. */ ctx = device_get_sysctl_ctx(sc->dev); tree_node = device_get_sysctl_tree(sc->dev); tree = SYSCTL_CHILDREN(tree_node); SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "resync", CTLFLAG_RW | CTLTYPE_UINT | CTLFLAG_NEEDGIANT, sc, sizeof(*sc), bcm_fb_resync_sysctl, "IU", "Set to resync framebuffer with VC"); } static int bcm_fb_probe(device_t dev) { if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) return (ENXIO); device_set_desc(dev, "BCM2835 VT framebuffer driver"); return (BUS_PROBE_DEFAULT); } static int bcm_fb_attach(device_t dev) { char bootargs[2048], *n, *p, *v; int err; phandle_t chosen; struct bcmsc_softc *sc; sc = device_get_softc(dev); sc->dev = dev; /* Newer firmware versions needs an inverted color palette. */ sc->fbswap = 0; chosen = OF_finddevice("/chosen"); if (chosen != -1 && OF_getprop(chosen, "bootargs", &bootargs, sizeof(bootargs)) > 0) { p = bootargs; while ((v = strsep(&p, " ")) != NULL) { if (*v == '\0') continue; n = strsep(&v, "="); if (strcmp(n, "bcm2708_fb.fbswap") == 0 && v != NULL) if (*v == '1') sc->fbswap = 1; } } bcm_fb_sysctl_init(sc); err = bcm_fb_setup_fbd(sc); if (err) return (err); return (0); } static struct fb_info * bcm_fb_helper_getinfo(device_t dev) { struct bcmsc_softc *sc; sc = device_get_softc(dev); return (&sc->info); } static device_method_t bcm_fb_methods[] = { /* Device interface */ DEVMETHOD(device_probe, bcm_fb_probe), DEVMETHOD(device_attach, bcm_fb_attach), /* Framebuffer service methods */ DEVMETHOD(fb_getinfo, bcm_fb_helper_getinfo), DEVMETHOD_END }; static driver_t bcm_fb_driver = { "fb", bcm_fb_methods, sizeof(struct bcmsc_softc), }; DRIVER_MODULE(bcm2835fb, ofwbus, bcm_fb_driver, 0, 0); DRIVER_MODULE(bcm2835fb, simplebus, bcm_fb_driver, 0, 0);