pld_wdog.c revision 1.2
1 /* $NetBSD: pld_wdog.c,v 1.2 2003/07/24 09:10:43 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 #ifdef PLD_WDOG_DEBUG 82 static void pldwdog_regs(struct pldwdog_softc *); 83 #endif 84 85 static int 86 pldwdog_tickle(struct sysmon_wdog *smw) 87 { 88 struct pldwdog_softc *sc = smw->smw_cookie; 89 90 #ifdef PLD_WDOG_DEBUG 91 printf("%s: pldwdog_tickle: mode %x, period %d\n", 92 sc->sc_dev.dv_xname, smw->smw_mode, smw->smw_period); 93 /* pldwdog_regs(sc); */ 94 #endif 95 96 bus_space_write_2(sc->sc_btag, sc->sc_bh, PLD_WDOG2_LIMIT, 97 smw->smw_period * 10); 98 bus_space_write_1(sc->sc_btag, sc->sc_bh, PLD_WDOG_INTR_MASK, 5); 99 100 return 0; 101 } 102 103 static int 104 pldwdog_setmode(struct sysmon_wdog *smw) 105 { 106 struct pldwdog_softc *sc = smw->smw_cookie; 107 108 #ifdef PLD_WDOG_DEBUG 109 printf("%s:pldwdog_setmode: mode %x\n", sc->sc_dev.dv_xname, smw->smw_mode); 110 #endif 111 112 if ((smw->smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) { 113 bus_space_write_1(sc->sc_btag, sc->sc_bh, PLD_WDOG_INTR_MASK, 7); 114 } else { 115 if (smw->smw_period == WDOG_PERIOD_DEFAULT) 116 smw->smw_period = sc->sc_wdog_period; 117 118 pldwdog_tickle(smw); 119 } 120 return (0); 121 } 122 123 #if 0 124 static int pldwdog_intr(void); 125 static int 126 pldwdog_intr() 127 { 128 129 printf("pldwdog_intr:\n"); 130 131 return 1; 132 } 133 #endif 134 135 int 136 pldwdog_match(struct device *parent, struct cfdata *cf, void *aux) 137 { 138 struct ebus_attach_args *ea = aux; 139 140 return (strcmp("watchdog", ea->ea_name) == 0); 141 } 142 143 #ifdef PLD_WDOG_DEBUG 144 static void 145 pldwdog_regs(struct pldwdog_softc *sc) 146 { 147 148 printf("%s: status 0x%02x, intr mask 0x%02x\n", 149 sc->sc_dev.dv_xname, 150 bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG_INTR_MASK), 151 bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG_STATUS)); 152 153 printf("%s: wdog1: count 0x%04x, limit 0x%04x, status 0x%02x\n", 154 sc->sc_dev.dv_xname, 155 bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG1_COUNTER), 156 bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG1_LIMIT), 157 bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG1_STATUS)); 158 159 printf("%s: wdog2: count 0x%04x, limit 0x%04x, status 0x%02x\n", 160 sc->sc_dev.dv_xname, 161 bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG2_COUNTER), 162 bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG2_LIMIT), 163 bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG2_STATUS)); 164 165 printf("%s: wdog3: count 0x%04x, limit 0x%04x, status 0x%02x\n", 166 sc->sc_dev.dv_xname, 167 bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG3_COUNTER), 168 bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG3_LIMIT), 169 bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG3_STATUS)); 170 } 171 #endif 172 173 void 174 pldwdog_attach(struct device *parent, struct device *self, void *aux) 175 { 176 struct pldwdog_softc *sc = (struct pldwdog_softc *)self; 177 struct ebus_attach_args *ea = aux; 178 179 sc->sc_btag = ea->ea_bustag; 180 181 if (ea->ea_nreg < 1) { 182 printf(": no registers??\n"); 183 return; 184 } 185 186 if (ea->ea_nvaddr) 187 sparc_promaddr_to_handle(sc->sc_btag, ea->ea_vaddr[0], &sc->sc_bh); 188 else if (bus_space_map(sc->sc_btag, EBUS_ADDR_FROM_REG(&ea->ea_reg[0]), 189 ea->ea_reg[0].size, 0, &sc->sc_bh) != 0) { 190 printf(": can't map register space\n"); 191 return; 192 } 193 194 sc->sc_wdog_period = PLD_WDOG_PERIOD_DEFAULT; 195 196 sc->sc_smw.smw_name = sc->sc_dev.dv_xname; 197 sc->sc_smw.smw_cookie = sc; 198 sc->sc_smw.smw_setmode = pldwdog_setmode; 199 sc->sc_smw.smw_tickle = pldwdog_tickle; 200 sc->sc_smw.smw_period = sc->sc_wdog_period; 201 202 if (sysmon_wdog_register(&sc->sc_smw) != 0) 203 printf("%s: unable to register with sysmon\n", 204 sc->sc_dev.dv_xname); 205 206 /* pldwdog_regs(sc); */ 207 208 #if 0 209 bus_intr_establish(ea->ea_bustag, ea->ea_intr[0], 210 IPL_TTY, pldwdog_intr, sc); 211 #endif 212 } 213
Indexes created Thu Sep 25 16:09:42 GMT 2025