1 /* $NetBSD: pld_wdog.c,v 1.11 2012/10/27 17:18:12 chs Exp $ */ 2 3 /*- 4 * Copyright (c) 2003 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: pld_wdog.c,v 1.11 2012/10/27 17:18:12 chs Exp $"); 31 32 #include <sys/types.h> 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/device.h> 36 37 #include <machine/autoconf.h> 38 39 #include <dev/ebus/ebusreg.h> 40 #include <dev/ebus/ebusvar.h> 41 42 #include <dev/sysmon/sysmonvar.h> 43 44 #define PLD_WDOG1_COUNTER 0x00 45 #define PLD_WDOG1_LIMIT 0x04 46 #define PLD_WDOG1_STATUS 0x08 47 #define PLD_WDOG2_COUNTER 0x10 48 #define PLD_WDOG2_LIMIT 0x14 49 #define PLD_WDOG2_STATUS 0x18 50 #define PLD_WDOG3_COUNTER 0x20 51 #define PLD_WDOG3_LIMIT 0x24 52 #define PLD_WDOG3_STATUS 0x28 53 54 #define PLD_WDOG_INTR_MASK 0x30 55 #define PLD_WDOG_STATUS 0x34 56 57 #define PLD_WDOG_PERIOD_DEFAULT 15 /* seconds */ 58 59 /* #define PLD_WDOG_DEBUG 1 */ 60 61 struct pldwdog_softc { 62 device_t sc_dev; 63 64 bus_space_tag_t sc_btag; 65 bus_space_handle_t sc_bh; 66 67 struct sysmon_wdog sc_smw; 68 int sc_wdog_period; 69 }; 70 71 int pldwdog_match(device_t, cfdata_t, void *); 72 void pldwdog_attach(device_t, device_t, void *); 73 74 CFATTACH_DECL_NEW(pldwdog, sizeof(struct pldwdog_softc), 75 pldwdog_match, pldwdog_attach, NULL, NULL); 76 77 #ifdef PLD_WDOG_DEBUG 78 static void pldwdog_regs(struct pldwdog_softc *); 79 #endif 80 81 static int 82 pldwdog_tickle(struct sysmon_wdog *smw) 83 { 84 struct pldwdog_softc *sc = smw->smw_cookie; 85 86 #ifdef PLD_WDOG_DEBUG 87 printf("%s: pldwdog_tickle: mode %x, period %d\n", 88 device_xname(sc->sc_dev), smw->smw_mode, smw->smw_period); 89 /* pldwdog_regs(sc); */ 90 #endif 91 92 bus_space_write_2(sc->sc_btag, sc->sc_bh, PLD_WDOG2_LIMIT, 93 smw->smw_period * 10); 94 bus_space_write_1(sc->sc_btag, sc->sc_bh, PLD_WDOG_INTR_MASK, 5); 95 96 return 0; 97 } 98 99 static int 100 pldwdog_setmode(struct sysmon_wdog *smw) 101 { 102 struct pldwdog_softc *sc = smw->smw_cookie; 103 104 #ifdef PLD_WDOG_DEBUG 105 printf("%s:pldwdog_setmode: mode %x\n", device_xname(sc->sc_dev), 106 smw->smw_mode); 107 #endif 108 109 if ((smw->smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) { 110 bus_space_write_1(sc->sc_btag, sc->sc_bh, PLD_WDOG_INTR_MASK, 7); 111 } else { 112 if (smw->smw_period == WDOG_PERIOD_DEFAULT) 113 smw->smw_period = sc->sc_wdog_period; 114 115 pldwdog_tickle(smw); 116 } 117 return (0); 118 } 119 120 #if 0 121 static int pldwdog_intr(void); 122 static int 123 pldwdog_intr(void) 124 { 125 126 printf("pldwdog_intr:\n"); 127 128 return 1; 129 } 130 #endif 131 132 int 133 pldwdog_match(device_t parent, cfdata_t cf, void *aux) 134 { 135 struct ebus_attach_args *ea = aux; 136 137 return (strcmp("watchdog", ea->ea_name) == 0); 138 } 139 140 #ifdef PLD_WDOG_DEBUG 141 static void 142 pldwdog_regs(struct pldwdog_softc *sc) 143 { 144 145 printf("%s: status 0x%02x, intr mask 0x%02x\n", 146 device_xname(sc->sc_dev), 147 bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG_INTR_MASK), 148 bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG_STATUS)); 149 150 printf("%s: wdog1: count 0x%04x, limit 0x%04x, status 0x%02x\n", 151 device_xname(sc->sc_dev), 152 bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG1_COUNTER), 153 bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG1_LIMIT), 154 bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG1_STATUS)); 155 156 printf("%s: wdog2: count 0x%04x, limit 0x%04x, status 0x%02x\n", 157 device_xname(sc->sc_dev), 158 bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG2_COUNTER), 159 bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG2_LIMIT), 160 bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG2_STATUS)); 161 162 printf("%s: wdog3: count 0x%04x, limit 0x%04x, status 0x%02x\n", 163 device_xname(sc->sc_dev), 164 bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG3_COUNTER), 165 bus_space_read_2(sc->sc_btag, sc->sc_bh, PLD_WDOG3_LIMIT), 166 bus_space_read_1(sc->sc_btag, sc->sc_bh, PLD_WDOG3_STATUS)); 167 } 168 #endif 169 170 void 171 pldwdog_attach(device_t parent, device_t self, void *aux) 172 { 173 struct pldwdog_softc *sc = device_private(self); 174 struct ebus_attach_args *ea = aux; 175 176 printf("\n"); 177 178 sc->sc_dev = self; 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 = device_xname(sc->sc_dev); 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 aprint_error_dev(sc->sc_dev, "unable to register with sysmon\n"); 204 205 /* pldwdog_regs(sc); */ 206 207 #if 0 208 bus_intr_establish(ea->ea_bustag, ea->ea_intr[0], 209 IPL_TTY, pldwdog_intr, sc); 210 #endif 211 } 212
Indexes created Sat Sep 20 22:09:52 GMT 2025