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
pldwdog_tickle(struct sysmon_wdog * smw)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
pldwdog_setmode(struct sysmon_wdog * smw)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
pldwdog_match(device_t parent,cfdata_t cf,void * aux)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
pldwdog_regs(struct pldwdog_softc * sc)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
pldwdog_attach(device_t parent,device_t self,void * aux)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