/* $NetBSD: genfb_sbus.c,v 1.13 2020/09/06 17:22:44 riastradh Exp $ */

/* $NetBSD: genfb_sbus.c,v 1.13 2020/09/06 17:22:44 riastradh Exp $ */

/*-
* Copyright (c) 2007 Michael Lorenz
* 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.
*/

/* an SBus frontend for the generic fb console driver */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: genfb_sbus.c,v 1.13 2020/09/06 17:22:44 riastradh Exp $");

#include <sys/param.h>
#include <sys/types.h>

#include <sys/buf.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/systm.h>

#include <uvm/uvm_extern.h>

#include <machine/autoconf.h>

#include <dev/sbus/sbusvar.h>
#include <dev/sun/fbio.h>
#include <dev/sun/fbvar.h>
#include <dev/wsfb/genfbvar.h>

struct genfb_sbus_softc {
struct genfb_softc sc_gen;
bus_space_tag_t sc_tag;
paddr_t sc_paddr;
};

static int genfb_match_sbus(device_t, cfdata_t, void *);
static void genfb_attach_sbus(device_t, device_t, void *);
static int genfb_ioctl_sbus(void *, void *, u_long, void *, int,
struct lwp*);
static paddr_t genfb_mmap_sbus(void *, void *, off_t, int);

CFATTACH_DECL_NEW(genfb_sbus, sizeof(struct genfb_sbus_softc),
genfb_match_sbus, genfb_attach_sbus, NULL, NULL);

/*
* Match a graphics device.
*/
static int
genfb_match_sbus(device_t parent, cfdata_t cf, void *aux)
{
struct sbus_attach_args *sa = aux;

/* if there's no address property we can't use the device */
if (prom_getpropint(sa->sa_node, "address", -1) == -1)
return 0;
if (strcmp("display", prom_getpropstring(sa->sa_node, "device_type"))
== 0)
return 1;

return 0;
}

/*
* Attach a display. We need to notice if it is the console, too.
*/
static void
genfb_attach_sbus(device_t parent, device_t self, void *args)
{
struct genfb_sbus_softc *sc = device_private(self);
struct sbus_attach_args *sa = args;
static const struct genfb_ops zero_ops;
struct genfb_ops ops = zero_ops;
prop_dictionary_t dict;
bus_space_handle_t bh;
paddr_t fbpa;
vaddr_t fbva;
int node = sa->sa_node;
int isconsole;

aprint_normal("\n");
sc->sc_gen.sc_dev = self;
/* Remember cookies for genfb_mmap_sbus() */
sc->sc_tag = sa->sa_bustag;
sc->sc_paddr = sbus_bus_addr(sa->sa_bustag, sa->sa_slot, sa->sa_offset);

/* read geometry information from the device tree */
sc->sc_gen.sc_width = prom_getpropint(sa->sa_node, "width", 1152);
sc->sc_gen.sc_height = prom_getpropint(sa->sa_node, "height", 900);
sc->sc_gen.sc_depth = prom_getpropint(sa->sa_node, "depth", 8);
sc->sc_gen.sc_stride = prom_getpropint(sa->sa_node, "linebytes",
(sc->sc_gen.sc_width * sc->sc_gen.sc_depth + 7) >> 3 );
sc->sc_gen.sc_fbsize = sc->sc_gen.sc_height * sc->sc_gen.sc_stride;
fbva = (uint32_t)prom_getpropint(sa->sa_node, "address", 0);
if (fbva == 0)
panic("this fb has no address property\n");
aprint_normal_dev(self, "%d x %d at %d bit\n",
sc->sc_gen.sc_width, sc->sc_gen.sc_height, sc->sc_gen.sc_depth);

pmap_extract(pmap_kernel(), fbva, &fbpa);
sc->sc_gen.sc_fboffset = (fbpa & 0x01ffffff) -
(sc->sc_paddr & 0x01ffffff);
aprint_normal_dev(self, "framebuffer at offset 0x%x\n",
(uint32_t)sc->sc_gen.sc_fboffset);

#if notyet
if (sc->sc_gen.sc_depth <= 8) {
/* setup some ANSIish colour map */
char boo[256];
snprintf(boo, 256, "\" pal!\" %x %x %x %x %x call",
sa->sa_node, 0, 0xa0, 0xa0, 0);
prom_interpret(boo);
}
#endif

isconsole = fb_is_console(node);
dict = device_properties(self);
prop_dictionary_set_bool(dict, "is_console", isconsole);

if (sbus_bus_map(sa->sa_bustag,
sa->sa_slot,
sa->sa_offset + sc->sc_gen.sc_fboffset,
sc->sc_gen.sc_fbsize,
BUS_SPACE_MAP_LINEAR, &bh) != 0) {
aprint_error_dev(self, "cannot map framebuffer\n");
return;
}
sc->sc_gen.sc_fbaddr = (void *)bus_space_vaddr(sa->sa_bustag, bh);

ops.genfb_ioctl = genfb_ioctl_sbus;
ops.genfb_mmap = genfb_mmap_sbus;

genfb_attach(&sc->sc_gen, &ops);
}

static int
genfb_ioctl_sbus(void *v, void *vs, u_long cmd, void *data, int flag,
struct lwp *l)
{

switch (cmd) {
case WSDISPLAYIO_GTYPE:
*(u_int *)data = WSDISPLAY_TYPE_GENFB;
return 0;
}

return EPASSTHROUGH;
}

static paddr_t
genfb_mmap_sbus(void *v, void *vs, off_t offset, int prot)
{
struct genfb_sbus_softc *sc = v;

/* regular fb mapping at 0 */
if ((offset >= 0) && (offset < sc->sc_gen.sc_fbsize)) {

return bus_space_mmap(sc->sc_tag, sc->sc_paddr,
sc->sc_gen.sc_fboffset + offset, prot,
BUS_SPACE_MAP_LINEAR);
}

return -1;
}