Driver for CP1500/1400 watchdog timer.
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petrov
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deb18e9d04
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fd3a71be25
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/* $NetBSD: pld_wdog.c,v 1.1 2003/07/17 20:54:41 petrov Exp $ */
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <machine/autoconf.h>
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#include <dev/ebus/ebusreg.h>
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#include <dev/ebus/ebusvar.h>
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#include <dev/sysmon/sysmonvar.h>
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#define PLD_WDOG1_COUNTER 0x00
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#define PLD_WDOG1_LIMIT 0x04
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#define PLD_WDOG1_STATUS 0x08
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#define PLD_WDOG2_COUNTER 0x10
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#define PLD_WDOG2_LIMIT 0x14
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#define PLD_WDOG2_STATUS 0x18
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#define PLD_WDOG3_COUNTER 0x20
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#define PLD_WDOG3_LIMIT 0x24
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#define PLD_WDOG3_STATUS 0x28
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#define PLD_WDOG_INTR_MASK 0x30
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#define PLD_WDOG_STATUS 0x34
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#define PLD_WDOG_PERIOD_DEFAULT 15 /* seconds */
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/* #define PLD_WDOG_DEBUG 1 */
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struct pldwdog_softc {
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struct device sc_dev;
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bus_space_tag_t sc_btag;
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bus_space_handle_t sc_bh;
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struct sysmon_wdog sc_smw;
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int sc_wdog_period;
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};
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int pldwdog_match(struct device *, struct cfdata *, void *);
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void pldwdog_attach(struct device *, struct device *, void *);
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CFATTACH_DECL(pldwdog, sizeof(struct pldwdog_softc),
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pldwdog_match, pldwdog_attach, NULL, NULL);
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static void pldwdog_regs(struct pldwdog_softc *);
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static int
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pldwdog_tickle(struct sysmon_wdog *smw)
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{
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struct pldwdog_softc *sc = smw->smw_cookie;
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#ifdef PLD_WDOG_DEBUG
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printf("%s: pldwdog_tickle: mode %x, period %d\n",
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sc->sc_dev.dv_xname, smw->smw_mode, smw->smw_period);
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/* pldwdog_regs(sc); */
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#endif
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bus_space_write_2(sc->sc_btag, sc->sc_bh, PLD_WDOG2_LIMIT,
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smw->smw_period * 10);
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bus_space_write_1(sc->sc_btag, sc->sc_bh, PLD_WDOG_INTR_MASK, 5);
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return 0;
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}
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static int
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pldwdog_setmode(struct sysmon_wdog *smw)
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{
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struct pldwdog_softc *sc = smw->smw_cookie;
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#ifdef PLD_WDOG_DEBUG
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printf("%s:pldwdog_setmode: mode %x\n", sc->sc_dev.dv_xname, smw->smw_mode);
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#endif
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if ((smw->smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) {
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bus_space_write_1(sc->sc_btag, sc->sc_bh, PLD_WDOG_INTR_MASK, 7);
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} else {
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if (smw->smw_period == WDOG_PERIOD_DEFAULT)
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smw->smw_period = sc->sc_wdog_period;
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pldwdog_tickle(smw);
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}
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return (0);
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}
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#if 0
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static int pldwdog_intr(void);
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static int
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pldwdog_intr()
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{
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printf("pldwdog_intr:\n");
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return 1;
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}
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#endif
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int
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pldwdog_match(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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struct ebus_attach_args *ea = aux;
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return (strcmp("watchdog", ea->ea_name) == 0);
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}
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#ifdef PLD_WDOG_DEBUG
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static void
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pldwdog_regs(sc)
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struct pldwdog_softc *sc;
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{
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printf("%s: status 0x%02x, intr mask 0x%02x\n",
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sc->sc_dev.dv_xname,
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bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG_INTR_MASK),
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bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG_STATUS));
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printf("%s: wdog1: count 0x%04x, limit 0x%04x, status 0x%02x\n",
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sc->sc_dev.dv_xname,
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bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG1_COUNTER),
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bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG1_LIMIT),
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bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG1_STATUS));
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printf("%s: wdog2: count 0x%04x, limit 0x%04x, status 0x%02x\n",
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sc->sc_dev.dv_xname,
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bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG2_COUNTER),
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bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG2_LIMIT),
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bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG2_STATUS));
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printf("%s: wdog3: count 0x%04x, limit 0x%04x, status 0x%02x\n",
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sc->sc_dev.dv_xname,
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bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG3_COUNTER),
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bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG3_LIMIT),
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bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG3_STATUS));
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}
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#endif
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void
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pldwdog_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct pldwdog_softc *sc = (struct pldwdog_softc *)self;
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struct ebus_attach_args *ea = aux;
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sc->sc_btag = ea->ea_bustag;
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if (ea->ea_nreg < 1) {
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printf(": no registers??\n");
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return;
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}
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if (ea->ea_nvaddr)
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sparc_promaddr_to_handle(sc->sc_btag, ea->ea_vaddr[0], &sc->sc_bh);
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else if (bus_space_map(sc->sc_btag, EBUS_ADDR_FROM_REG(&ea->ea_reg[0]),
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ea->ea_reg[0].size, 0, &sc->sc_bh) != 0) {
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printf(": can't map register space\n");
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return;
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}
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sc->sc_wdog_period = PLD_WDOG_PERIOD_DEFAULT;
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sc->sc_smw.smw_name = sc->sc_dev.dv_xname;
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sc->sc_smw.smw_cookie = sc;
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sc->sc_smw.smw_setmode = pldwdog_setmode;
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sc->sc_smw.smw_tickle = pldwdog_tickle;
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sc->sc_smw.smw_period = sc->sc_wdog_period;
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if (sysmon_wdog_register(&sc->sc_smw) != 0)
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printf("%s: unable to register with sysmon\n",
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sc->sc_dev.dv_xname);
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/* pldwdog_regs(sc); */
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#if 0
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bus_intr_establish(ea->ea_bustag, ea->ea_intr[0],
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IPL_TTY, pldwdog_intr, sc);
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#endif
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}
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