freebsd-dev/sys/arm/broadcom/bcm2835/bcm2835_fbd.c

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
* 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bio.h>
#include <sys/bus.h>
#include <sys/fbio.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
2015-04-04 23:03:11 +00:00
#include <vm/vm.h>
#include <vm/pmap.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/fb/fbreg.h>
#include <dev/vt/vt.h>
#include <dev/vt/colors/vt_termcolors.h>
#include <arm/broadcom/bcm2835/bcm2835_mbox_prop.h>
#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);
fb->bpp = FB_DEPTH;
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_generate_cons_palette(sc->info.fb_cmap,
COLOR_FORMAT_RGB, 0xff, 0, 0xff, 8, 0xff, 16);
sc->info.fb_cmsize = 16;
break;
case 32:
vt_generate_cons_palette(sc->info.fb_cmap,
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(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(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, 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 devclass_t bcm_fb_devclass;
static driver_t bcm_fb_driver = {
"fb",
bcm_fb_methods,
sizeof(struct bcmsc_softc),
};
DRIVER_MODULE(bcm2835fb, ofwbus, bcm_fb_driver, bcm_fb_devclass, 0, 0);
DRIVER_MODULE(bcm2835fb, simplebus, bcm_fb_driver, bcm_fb_devclass, 0, 0);