NetBSD/sys/arch/hpcmips/dev/m38813c.c

238 lines
5.8 KiB
C

/* $NetBSD: m38813c.c,v 1.6 2002/01/29 18:53:10 uch Exp $ */
/*-
* Copyright (c) 1999, 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by UCHIYAMA Yasushi.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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.
*/
/*
* Device driver for MITUBISHI M38813 controller
*/
#include "opt_use_poll.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <dev/hpc/hpckbdvar.h>
#include <hpcmips/tx/tx39var.h>
#include <hpcmips/tx/txcsbusvar.h>
#include <hpcmips/dev/m38813cvar.h>
struct m38813c_chip {
bus_space_tag_t scc_cst;
bus_space_handle_t scc_csh;
int scc_enabled;
int t_lastchar;
int t_extended;
int t_extended1;
struct hpckbd_ic_if scc_if;
struct hpckbd_if *scc_hpckbd;
};
struct m38813c_softc {
struct device sc_dev;
struct m38813c_chip *sc_chip;
tx_chipset_tag_t sc_tc;
void *sc_ih;
};
int m38813c_match(struct device *, struct cfdata *, void *);
void m38813c_attach(struct device *, struct device *, void *);
int m38813c_intr(void *);
int m38813c_poll(void *);
void m38813c_ifsetup(struct m38813c_chip *);
int m38813c_input_establish(void *, struct hpckbd_if *);
struct m38813c_chip m38813c_chip;
struct cfattach m38813c_ca = {
sizeof(struct m38813c_softc), m38813c_match, m38813c_attach
};
int
m38813c_match(struct device *parent, struct cfdata *cf, void *aux)
{
return (1);
}
void
m38813c_attach(struct device *parent, struct device *self, void *aux)
{
struct cs_attach_args *ca = aux;
struct m38813c_softc *sc = (void*)self;
struct hpckbd_attach_args haa;
sc->sc_tc = ca->ca_tc;
sc->sc_chip = &m38813c_chip;
sc->sc_chip->scc_cst = ca->ca_csio.cstag;
if (bus_space_map(sc->sc_chip->scc_cst, ca->ca_csio.csbase,
ca->ca_csio.cssize, 0, &sc->sc_chip->scc_csh)) {
printf(": can't map i/o space\n");
}
#ifndef USE_POLL
#error options USE_POLL requied.
#endif
if (!(sc->sc_ih = tx39_poll_establish(sc->sc_tc, 1,
IPL_TTY, m38813c_intr,
sc))) {
printf(": can't establish interrupt\n");
}
printf("\n");
/* setup upper interface */
m38813c_ifsetup(sc->sc_chip);
haa.haa_ic = &sc->sc_chip->scc_if;
config_found(self, &haa, hpckbd_print);
}
void
m38813c_ifsetup(struct m38813c_chip *scc)
{
scc->scc_if.hii_ctx = scc;
scc->scc_if.hii_establish = m38813c_input_establish;
scc->scc_if.hii_poll = m38813c_intr;
}
int
m38813c_cnattach(paddr_t addr)
{
struct m38813c_chip *scc = &m38813c_chip;
scc->scc_csh = MIPS_PHYS_TO_KSEG1(addr);
m38813c_ifsetup(scc);
hpckbd_cnattach(&scc->scc_if);
return (0);
}
int
m38813c_input_establish(void *ic, struct hpckbd_if *kbdif)
{
struct m38813c_chip *scc = ic;
/* save lower interface */
scc->scc_hpckbd = kbdif;
scc->scc_enabled = 1;
return (0);
}
#define KBR_EXTENDED0 0xE0 /* extended key sequence */
#define KBR_EXTENDED1 0xE1 /* extended key sequence */
int
m38813c_intr(void *arg)
{
struct m38813c_softc *sc = arg;
return (m38813c_poll(sc->sc_chip));
}
int
m38813c_poll(void *arg)
{
struct m38813c_chip *scc = arg;
bus_space_tag_t t = scc->scc_cst;
bus_space_handle_t h = scc->scc_csh;
int datain, type, key;
if (!scc->scc_enabled) {
return (0);
}
datain= bus_space_read_1(t, h, 0);
hpckbd_input_hook(scc->scc_hpckbd);
if (datain == KBR_EXTENDED0) {
scc->t_extended = 1;
return (0);
} else if (datain == KBR_EXTENDED1) {
scc->t_extended1 = 2;
return (0);
}
/* map extended keys to (unused) codes 128-254 */
key = (datain & 0x7f) | (scc->t_extended ? 0x80 : 0);
scc->t_extended = 0;
/*
* process BREAK key (EXT1 1D 45 EXT1 9D C5):
* map to (unused) code 7F
*/
if (scc->t_extended1 == 2 && (datain == 0x1d || datain == 0x9d)) {
scc->t_extended1 = 1;
return (0);
} else if (scc->t_extended1 == 1 &&
(datain == 0x45 || datain == 0xc5)) {
scc->t_extended1 = 0;
key = 0x7f;
} else if (scc->t_extended1 > 0) {
scc->t_extended1 = 0;
}
if (datain & 0x80) {
scc->t_lastchar = 0;
type = 0;
} else {
/* Always ignore typematic keys */
if (key == scc->t_lastchar)
return 0;
scc->t_lastchar = key;
type = 1;
}
hpckbd_input(scc->scc_hpckbd, type, key);
return (0);
}