/* $NetBSD: bcm2835_genfb.c,v 1.9 2018/04/01 04:35:03 ryo Exp $ */
/*-
* Copyright (c) 2013 Jared D. McNeill <jmcneill@invisible.ca>
* All rights reserved.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Generic framebuffer console driver
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: bcm2835_genfb.c,v 1.9 2018/04/01 04:35:03 ryo Exp $");
#include <sys/param.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/bus.h>
#include <sys/kmem.h>
#include <dev/fdt/fdtvar.h>
#include <dev/wsfb/genfbvar.h>
struct bcmgenfb_softc {
struct genfb_softc sc_gen;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
uint32_t sc_wstype;
};
static int bcmgenfb_match(device_t, cfdata_t, void *);
static void bcmgenfb_attach(device_t, device_t, void *);
static int bcmgenfb_ioctl(void *, void *, u_long, void *, int, lwp_t *);
static paddr_t bcmgenfb_mmap(void *, void *, off_t, int);
static bool bcmgenfb_shutdown(device_t, int);
void bcmgenfb_set_console_dev(device_t);
void bcmgenfb_set_ioctl(int(*)(void *, void *, u_long, void *, int, struct lwp *));
void bcmgenfb_ddb_trap_callback(int);
static device_t bcmgenfb_console_dev = NULL;
int (*bcmgenfb_ioctl_handler)(void *, void *, u_long, void *, int, struct lwp *) = NULL;
CFATTACH_DECL_NEW(bcmgenfb, sizeof(struct bcmgenfb_softc),
bcmgenfb_match, bcmgenfb_attach, NULL, NULL);
static int
bcmgenfb_match(device_t parent, cfdata_t match, void *aux)
{
const char * const compatible[] = { "brcm,bcm2835-fb", NULL };
struct fdt_attach_args * const faa = aux;
return of_match_compatible(faa->faa_phandle, compatible);
}
static void
bcmgenfb_attach(device_t parent, device_t self, void *aux)
{
struct bcmgenfb_softc *sc = device_private(self);
struct fdt_attach_args * const faa = aux;
prop_dictionary_t dict = device_properties(self);
static const struct genfb_ops zero_ops;
struct genfb_ops ops = zero_ops;
bool is_console = false;
int error;
sc->sc_gen.sc_dev = self;
sc->sc_iot = faa->faa_bst;
sc->sc_wstype = WSDISPLAY_TYPE_VC4;
prop_dictionary_get_uint32(dict, "wsdisplay_type", &sc->sc_wstype);
prop_dictionary_get_bool(dict, "is_console", &is_console);
genfb_init(&sc->sc_gen);
if (sc->sc_gen.sc_width == 0 ||
sc->sc_gen.sc_fbsize == 0) {
aprint_normal(": disabled\n");
return;
}
pmf_device_register1(self, NULL, NULL, bcmgenfb_shutdown);
error = bus_space_map(sc->sc_iot, sc->sc_gen.sc_fboffset,
sc->sc_gen.sc_fbsize,
BUS_SPACE_MAP_LINEAR|BUS_SPACE_MAP_PREFETCHABLE, &sc->sc_ioh);
if (error) {
aprint_error_dev(self, "couldn't map framebuffer (%d)\n",
error);
return;
}
sc->sc_gen.sc_fbaddr = bus_space_vaddr(sc->sc_iot, sc->sc_ioh);
ops.genfb_ioctl = bcmgenfb_ioctl;
ops.genfb_mmap = bcmgenfb_mmap;
aprint_naive("\n");
if (is_console)
aprint_normal(": switching to framebuffer console\n");
else
aprint_normal("\n");
genfb_attach(&sc->sc_gen, &ops);
}
static int
bcmgenfb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, lwp_t *l)
{
struct bcmgenfb_softc *sc = v;
struct wsdisplayio_bus_id *busid;
switch (cmd) {
case WSDISPLAYIO_GTYPE:
*(u_int *)data = sc->sc_wstype;
return 0;
case WSDISPLAYIO_GET_BUSID:
busid = data;
busid->bus_type = WSDISPLAYIO_BUS_SOC;
return 0;
case WSDISPLAYIO_GET_FBINFO:
{
struct wsdisplayio_fbinfo *fbi = data;
struct rasops_info *ri = &sc->sc_gen.vd.active->scr_ri;
int ret;
ret = wsdisplayio_get_fbinfo(ri, fbi);
fbi->fbi_flags |= WSFB_VRAM_IS_RAM;
return ret;
}
default:
if (bcmgenfb_ioctl_handler != NULL)
return bcmgenfb_ioctl_handler(v, vs, cmd, data, flag, l);
return EPASSTHROUGH;
}
}
static paddr_t
bcmgenfb_mmap(void *v, void *vs, off_t offset, int prot)
{
struct bcmgenfb_softc *sc = v;
if (offset < 0 || offset >= sc->sc_gen.sc_fbsize)
return -1;
return bus_space_mmap(sc->sc_iot, sc->sc_gen.sc_fboffset, offset,
prot, BUS_SPACE_MAP_LINEAR|BUS_SPACE_MAP_PREFETCHABLE);
}
static bool
bcmgenfb_shutdown(device_t self, int flags)
{
genfb_enable_polling(self);
return true;
}
void
bcmgenfb_set_console_dev(device_t dev)
{
/* skip if already set. called from each genfb0,genfb1,... */
if (bcmgenfb_console_dev != NULL)
return;
bcmgenfb_console_dev = dev;
}
void
bcmgenfb_set_ioctl(int(*boo)(void *, void *, u_long, void *, int, struct lwp *))
{
bcmgenfb_ioctl_handler = boo;
}
void
bcmgenfb_ddb_trap_callback(int where)
{
if (bcmgenfb_console_dev == NULL)
return;
if (where) {
genfb_enable_polling(bcmgenfb_console_dev);
} else {
genfb_disable_polling(bcmgenfb_console_dev);
}
}