pld_wdog.c revision 1.1
1 /* $NetBSD: pld_wdog.c,v 1.1 2003/07/17 20:54:41 petrov Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the NetBSD 18 * Foundation, Inc. and its contributors. 19 * 4. Neither the name of The NetBSD Foundation nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #include <sys/types.h> 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/device.h> 40 41 #include <machine/autoconf.h> 42 43 #include <dev/ebus/ebusreg.h> 44 #include <dev/ebus/ebusvar.h> 45 46 #include <dev/sysmon/sysmonvar.h> 47 48 #define PLD_WDOG1_COUNTER 0x00 49 #define PLD_WDOG1_LIMIT 0x04 50 #define PLD_WDOG1_STATUS 0x08 51 #define PLD_WDOG2_COUNTER 0x10 52 #define PLD_WDOG2_LIMIT 0x14 53 #define PLD_WDOG2_STATUS 0x18 54 #define PLD_WDOG3_COUNTER 0x20 55 #define PLD_WDOG3_LIMIT 0x24 56 #define PLD_WDOG3_STATUS 0x28 57 58 #define PLD_WDOG_INTR_MASK 0x30 59 #define PLD_WDOG_STATUS 0x34 60 61 #define PLD_WDOG_PERIOD_DEFAULT 15 /* seconds */ 62 63 /* #define PLD_WDOG_DEBUG 1 */ 64 65 struct pldwdog_softc { 66 struct device sc_dev; 67 68 bus_space_tag_t sc_btag; 69 bus_space_handle_t sc_bh; 70 71 struct sysmon_wdog sc_smw; 72 int sc_wdog_period; 73 }; 74 75 int pldwdog_match(struct device *, struct cfdata *, void *); 76 void pldwdog_attach(struct device *, struct device *, void *); 77 78 CFATTACH_DECL(pldwdog, sizeof(struct pldwdog_softc), 79 pldwdog_match, pldwdog_attach, NULL, NULL); 80 81 static void pldwdog_regs(struct pldwdog_softc *); 82 83 static int 84 pldwdog_tickle(struct sysmon_wdog *smw) 85 { 86 struct pldwdog_softc *sc = smw->smw_cookie; 87 88 #ifdef PLD_WDOG_DEBUG 89 printf("%s: pldwdog_tickle: mode %x, period %d\n", 90 sc->sc_dev.dv_xname, smw->smw_mode, smw->smw_period); 91 /* pldwdog_regs(sc); */ 92 #endif 93 94 bus_space_write_2(sc->sc_btag, sc->sc_bh, PLD_WDOG2_LIMIT, 95 smw->smw_period * 10); 96 bus_space_write_1(sc->sc_btag, sc->sc_bh, PLD_WDOG_INTR_MASK, 5); 97 98 return 0; 99 } 100 101 static int 102 pldwdog_setmode(struct sysmon_wdog *smw) 103 { 104 struct pldwdog_softc *sc = smw->smw_cookie; 105 106 #ifdef PLD_WDOG_DEBUG 107 printf("%s:pldwdog_setmode: mode %x\n", sc->sc_dev.dv_xname, smw->smw_mode); 108 #endif 109 110 if ((smw->smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) { 111 bus_space_write_1(sc->sc_btag, sc->sc_bh, PLD_WDOG_INTR_MASK, 7); 112 } else { 113 if (smw->smw_period == WDOG_PERIOD_DEFAULT) 114 smw->smw_period = sc->sc_wdog_period; 115 116 pldwdog_tickle(smw); 117 } 118 return (0); 119 } 120 121 #if 0 122 static int pldwdog_intr(void); 123 static int 124 pldwdog_intr() 125 { 126 127 printf("pldwdog_intr:\n"); 128 129 return 1; 130 } 131 #endif 132 133 int 134 pldwdog_match(parent, cf, aux) 135 struct device *parent; 136 struct cfdata *cf; 137 void *aux; 138 { 139 struct ebus_attach_args *ea = aux; 140 141 return (strcmp("watchdog", ea->ea_name) == 0); 142 } 143 144 #ifdef PLD_WDOG_DEBUG 145 static void 146 pldwdog_regs(sc) 147 struct pldwdog_softc *sc; 148 { 149 150 printf("%s: status 0x%02x, intr mask 0x%02x\n", 151 sc->sc_dev.dv_xname, 152 bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG_INTR_MASK), 153 bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG_STATUS)); 154 155 printf("%s: wdog1: count 0x%04x, limit 0x%04x, status 0x%02x\n", 156 sc->sc_dev.dv_xname, 157 bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG1_COUNTER), 158 bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG1_LIMIT), 159 bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG1_STATUS)); 160 161 printf("%s: wdog2: count 0x%04x, limit 0x%04x, status 0x%02x\n", 162 sc->sc_dev.dv_xname, 163 bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG2_COUNTER), 164 bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG2_LIMIT), 165 bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG2_STATUS)); 166 167 printf("%s: wdog3: count 0x%04x, limit 0x%04x, status 0x%02x\n", 168 sc->sc_dev.dv_xname, 169 bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG3_COUNTER), 170 bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG3_LIMIT), 171 bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG3_STATUS)); 172 } 173 #endif 174 175 void 176 pldwdog_attach(parent, self, aux) 177 struct device *parent, *self; 178 void *aux; 179 { 180 struct pldwdog_softc *sc = (struct pldwdog_softc *)self; 181 struct ebus_attach_args *ea = aux; 182 183 sc->sc_btag = ea->ea_bustag; 184 185 if (ea->ea_nreg < 1) { 186 printf(": no registers??\n"); 187 return; 188 } 189 190 if (ea->ea_nvaddr) 191 sparc_promaddr_to_handle(sc->sc_btag, ea->ea_vaddr[0], &sc->sc_bh); 192 else if (bus_space_map(sc->sc_btag, EBUS_ADDR_FROM_REG(&ea->ea_reg[0]), 193 ea->ea_reg[0].size, 0, &sc->sc_bh) != 0) { 194 printf(": can't map register space\n"); 195 return; 196 } 197 198 sc->sc_wdog_period = PLD_WDOG_PERIOD_DEFAULT; 199 200 sc->sc_smw.smw_name = sc->sc_dev.dv_xname; 201 sc->sc_smw.smw_cookie = sc; 202 sc->sc_smw.smw_setmode = pldwdog_setmode; 203 sc->sc_smw.smw_tickle = pldwdog_tickle; 204 sc->sc_smw.smw_period = sc->sc_wdog_period; 205 206 if (sysmon_wdog_register(&sc->sc_smw) != 0) 207 printf("%s: unable to register with sysmon\n", 208 sc->sc_dev.dv_xname); 209 210 /* pldwdog_regs(sc); */ 211 212 #if 0 213 bus_intr_establish(ea->ea_bustag, ea->ea_intr[0], 214 IPL_TTY, pldwdog_intr, sc); 215 #endif 216 } 217
Indexes created Mon Oct 13 05:10:05 GMT 2025