/* $NetBSD: com_intio.c,v 1.2 2018/12/08 17:46:13 thorpej Exp $ */

/* $NetBSD: com_intio.c,v 1.2 2018/12/08 17:46:13 thorpej Exp $ */

/*
* Copyright (c) 2009 Tetsuya Isaki. 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 AUTHOR ``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 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.
*/

/*
* PSX16550, High-speed RS-232C board
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: com_intio.c,v 1.2 2018/12/08 17:46:13 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/tty.h>
#include <sys/device.h>
#include <sys/bus.h>

#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>

#include <machine/cpu.h>

#include <arch/x68k/dev/intiovar.h>

#define COM_PSX16550_FREQ (22118400 / 2)
#define COM_PSX16550_SIZE (COM_NPORTS << 1)
#define COM_PSX16550_REG_VECT com_scratch

static int com_intio_match(device_t, cfdata_t, void *);
static void com_intio_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(com_intio, sizeof(struct com_softc),
com_intio_match, com_intio_attach, NULL, NULL);

static int
com_intio_match(device_t parent, cfdata_t cf, void *aux)
{
struct intio_attach_args *ia = aux;
bus_space_tag_t iot;
bus_space_handle_t ioh;
int iobase;
int rv;

/* Check whether the board is inserted or not */
if (badaddr((void *)IIOV(ia->ia_addr)))
return 0;

ia->ia_size = COM_PSX16550_SIZE;
if (intio_map_allocate_region(parent, ia, INTIO_MAP_TESTONLY) < 0)
return 0;

iot = ia->ia_bst;
iobase = ia->ia_addr;

/* if it's in use as console, it's there. */
if (com_is_console(iot, iobase, NULL))
return 1;

if (bus_space_map(iot, iobase, ia->ia_size,
BUS_SPACE_MAP_SHIFTED_ODD, &ioh))
return 0;

rv = comprobe1(iot, ioh);
bus_space_unmap(iot, ioh, ia->ia_size);

return rv;
}

static void
com_intio_attach(device_t parent, device_t self, void *aux)
{
struct com_softc *sc = device_private(self);
struct intio_attach_args *ia = aux;
bus_space_tag_t iot;
bus_space_handle_t ioh;
int iobase;

intio_map_allocate_region(parent, ia, INTIO_MAP_ALLOCATE);

sc->sc_dev = self;
iot = ia->ia_bst;
iobase = ia->ia_addr;
if (bus_space_map(iot, iobase, ia->ia_size,
BUS_SPACE_MAP_SHIFTED_ODD, &ioh)) {
aprint_error(": can't map I/O space\n");
return;
}

/* check and set interrupt vector */
if (ia->ia_intr < 16 || ia->ia_intr > 255) {
aprint_error(": invalid intr vector (0x%02x)\n", ia->ia_intr);
return;
}
bus_space_write_1(iot, ioh, COM_PSX16550_REG_VECT, ia->ia_intr);

sc->sc_frequency = COM_PSX16550_FREQ;
com_init_regs(&sc->sc_regs, iot, ioh, iobase);

/* PSX16550 uses MCR_DRS to switch interrupt priority level */
SET(sc->sc_mcr, MCR_DRS); /* 0: ipl2 / 1: ipl4 */

com_attach_subr(sc);

if (intio_intr_establish(ia->ia_intr, device_xname(self),
comintr, sc))
aprint_error_dev(self, "can't establish interrupt handler\n");
}