277 lines
6.8 KiB
C
277 lines
6.8 KiB
C
/*-
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* Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
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* Copyright (c) 2012, 2013 The FreeBSD Foundation
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* All rights reserved.
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*
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* Portions of this software were developed by Oleksandr Rybalko
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bio.h>
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#include <sys/bus.h>
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#include <sys/fbio.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/fb/fbreg.h>
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#include <dev/vt/vt.h>
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#include <dev/vt/colors/vt_termcolors.h>
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#include <arm/broadcom/bcm2835/bcm2835_mbox_prop.h>
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#include "fb_if.h"
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#include "mbox_if.h"
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#define FB_DEPTH 24
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struct bcmsc_softc {
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struct fb_info info;
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int fbswap;
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struct bcm2835_fb_config fb;
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device_t dev;
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};
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static struct ofw_compat_data compat_data[] = {
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{"broadcom,bcm2835-fb", 1},
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{"brcm,bcm2708-fb", 1},
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{NULL, 0}
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};
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static int bcm_fb_probe(device_t);
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static int bcm_fb_attach(device_t);
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static int
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bcm_fb_init(struct bcmsc_softc *sc, struct bcm2835_fb_config *fb)
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{
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int err;
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err = 0;
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memset(fb, 0, sizeof(*fb));
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if (bcm2835_mbox_fb_get_w_h(fb) != 0)
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return (ENXIO);
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fb->bpp = FB_DEPTH;
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fb->vxres = fb->xres;
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fb->vyres = fb->yres;
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fb->xoffset = fb->yoffset = 0;
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if ((err = bcm2835_mbox_fb_init(fb)) != 0) {
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device_printf(sc->dev, "bcm2835_mbox_fb_init failed, err=%d\n", err);
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return (ENXIO);
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}
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return (0);
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}
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static int
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bcm_fb_setup_fbd(struct bcmsc_softc *sc)
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{
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struct bcm2835_fb_config fb;
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device_t fbd;
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int err;
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err = bcm_fb_init(sc, &fb);
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if (err)
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return (err);
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memset(&sc->info, 0, sizeof(sc->info));
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sc->info.fb_name = device_get_nameunit(sc->dev);
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sc->info.fb_vbase = (intptr_t)pmap_mapdev(fb.base, fb.size);
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sc->info.fb_pbase = fb.base;
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sc->info.fb_size = fb.size;
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sc->info.fb_bpp = sc->info.fb_depth = fb.bpp;
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sc->info.fb_stride = fb.pitch;
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sc->info.fb_width = fb.xres;
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sc->info.fb_height = fb.yres;
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#ifdef VM_MEMATTR_WRITE_COMBINING
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sc->info.fb_flags = FB_FLAG_MEMATTR;
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sc->info.fb_memattr = VM_MEMATTR_WRITE_COMBINING;
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#endif
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if (sc->fbswap) {
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switch (sc->info.fb_bpp) {
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case 24:
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vt_generate_cons_palette(sc->info.fb_cmap,
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COLOR_FORMAT_RGB, 0xff, 0, 0xff, 8, 0xff, 16);
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sc->info.fb_cmsize = 16;
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break;
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case 32:
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vt_generate_cons_palette(sc->info.fb_cmap,
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COLOR_FORMAT_RGB, 0xff, 16, 0xff, 8, 0xff, 0);
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sc->info.fb_cmsize = 16;
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break;
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}
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}
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fbd = device_add_child(sc->dev, "fbd", device_get_unit(sc->dev));
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if (fbd == NULL) {
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device_printf(sc->dev, "Failed to add fbd child\n");
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pmap_unmapdev(sc->info.fb_vbase, sc->info.fb_size);
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return (ENXIO);
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} else if (device_probe_and_attach(fbd) != 0) {
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device_printf(sc->dev, "Failed to attach fbd device\n");
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device_delete_child(sc->dev, fbd);
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pmap_unmapdev(sc->info.fb_vbase, sc->info.fb_size);
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return (ENXIO);
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}
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device_printf(sc->dev, "%dx%d(%dx%d@%d,%d) %dbpp\n", fb.xres, fb.yres,
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fb.vxres, fb.vyres, fb.xoffset, fb.yoffset, fb.bpp);
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device_printf(sc->dev,
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"fbswap: %d, pitch %d, base 0x%08x, screen_size %d\n",
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sc->fbswap, fb.pitch, fb.base, fb.size);
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return (0);
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}
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static int
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bcm_fb_resync_sysctl(SYSCTL_HANDLER_ARGS)
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{
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struct bcmsc_softc *sc = arg1;
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struct bcm2835_fb_config fb;
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int val;
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int err;
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val = 0;
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err = sysctl_handle_int(oidp, &val, 0, req);
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if (err || !req->newptr) /* error || read request */
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return (err);
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bcm_fb_init(sc, &fb);
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return (0);
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}
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static void
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bcm_fb_sysctl_init(struct bcmsc_softc *sc)
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{
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struct sysctl_ctx_list *ctx;
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struct sysctl_oid *tree_node;
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struct sysctl_oid_list *tree;
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/*
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* Add system sysctl tree/handlers.
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*/
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ctx = device_get_sysctl_ctx(sc->dev);
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tree_node = device_get_sysctl_tree(sc->dev);
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tree = SYSCTL_CHILDREN(tree_node);
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SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "resync",
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CTLFLAG_RW | CTLTYPE_UINT, sc, sizeof(*sc),
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bcm_fb_resync_sysctl, "IU", "Set to resync framebuffer with VC");
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}
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static int
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bcm_fb_probe(device_t dev)
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{
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if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
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return (ENXIO);
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device_set_desc(dev, "BCM2835 VT framebuffer driver");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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bcm_fb_attach(device_t dev)
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{
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char bootargs[2048], *n, *p, *v;
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int err;
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phandle_t chosen;
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struct bcmsc_softc *sc;
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sc = device_get_softc(dev);
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sc->dev = dev;
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/* Newer firmware versions needs an inverted color palette. */
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sc->fbswap = 0;
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chosen = OF_finddevice("/chosen");
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if (chosen != 0 &&
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OF_getprop(chosen, "bootargs", &bootargs, sizeof(bootargs)) > 0) {
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p = bootargs;
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while ((v = strsep(&p, " ")) != NULL) {
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if (*v == '\0')
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continue;
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n = strsep(&v, "=");
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if (strcmp(n, "bcm2708_fb.fbswap") == 0 && v != NULL)
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if (*v == '1')
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sc->fbswap = 1;
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}
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}
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bcm_fb_sysctl_init(sc);
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err = bcm_fb_setup_fbd(sc);
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if (err)
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return (err);
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return (0);
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}
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static struct fb_info *
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bcm_fb_helper_getinfo(device_t dev)
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{
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struct bcmsc_softc *sc;
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sc = device_get_softc(dev);
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return (&sc->info);
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}
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static device_method_t bcm_fb_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, bcm_fb_probe),
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DEVMETHOD(device_attach, bcm_fb_attach),
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/* Framebuffer service methods */
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DEVMETHOD(fb_getinfo, bcm_fb_helper_getinfo),
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DEVMETHOD_END
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};
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static devclass_t bcm_fb_devclass;
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static driver_t bcm_fb_driver = {
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"fb",
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bcm_fb_methods,
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sizeof(struct bcmsc_softc),
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};
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DRIVER_MODULE(bcm2835fb, ofwbus, bcm_fb_driver, bcm_fb_devclass, 0, 0);
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DRIVER_MODULE(bcm2835fb, simplebus, bcm_fb_driver, bcm_fb_devclass, 0, 0);
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