FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/mk48txx.c
1 /* $NetBSD: mk48txx.c,v 1.28 2020/01/01 19:24:03 thorpej Exp $ */
2 /*-
3 * Copyright (c) 2000 The NetBSD Foundation, Inc.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to The NetBSD Foundation
7 * by Paul Kranenburg.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 /*
32 * Mostek MK48T02, MK48T08, MK48T59 time-of-day chip subroutines.
33 */
34
35 #include <sys/cdefs.h>
36 __KERNEL_RCSID(0, "$NetBSD: mk48txx.c,v 1.28 2020/01/01 19:24:03 thorpej Exp $");
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/device.h>
41 #include <sys/errno.h>
42
43 #include <sys/bus.h>
44 #include <dev/clock_subr.h>
45 #include <dev/ic/mk48txxreg.h>
46 #include <dev/ic/mk48txxvar.h>
47
48 int mk48txx_gettime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *);
49 int mk48txx_settime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *);
50 uint8_t mk48txx_def_nvrd(struct mk48txx_softc *, int);
51 void mk48txx_def_nvwr(struct mk48txx_softc *, int, uint8_t);
52
53 const struct {
54 const char *name;
55 bus_size_t nvramsz;
56 bus_size_t clkoff;
57 int flags;
58 #define MK48TXX_EXT_REGISTERS 1 /* Has extended register set */
59 } mk48txx_models[] = {
60 { "mk48t02", MK48T02_CLKSZ, MK48T02_CLKOFF, 0 },
61 { "mk48t08", MK48T08_CLKSZ, MK48T08_CLKOFF, 0 },
62 { "mk48t18", MK48T18_CLKSZ, MK48T18_CLKOFF, 0 },
63 { "mk48t59", MK48T59_CLKSZ, MK48T59_CLKOFF, MK48TXX_EXT_REGISTERS },
64 { "ds1553", DS1553_CLKSZ, DS1553_CLKOFF, MK48TXX_EXT_REGISTERS },
65 };
66
67 void
68 mk48txx_attach(struct mk48txx_softc *sc)
69 {
70 todr_chip_handle_t handle;
71 int i;
72
73 aprint_normal(": %s", sc->sc_model);
74
75 i = __arraycount(mk48txx_models);
76 while (--i >= 0) {
77 if (strcmp(sc->sc_model, mk48txx_models[i].name) == 0)
78 break;
79 }
80 if (i < 0)
81 panic("%s: unsupported model", __func__);
82
83 sc->sc_nvramsz = mk48txx_models[i].nvramsz;
84 sc->sc_clkoffset = mk48txx_models[i].clkoff;
85
86 handle = &sc->sc_handle;
87 handle->cookie = sc;
88 handle->todr_gettime = NULL;
89 handle->todr_settime = NULL;
90 handle->todr_gettime_ymdhms = mk48txx_gettime_ymdhms;
91 handle->todr_settime_ymdhms = mk48txx_settime_ymdhms;
92
93 if (sc->sc_nvrd == NULL)
94 sc->sc_nvrd = mk48txx_def_nvrd;
95 if (sc->sc_nvwr == NULL)
96 sc->sc_nvwr = mk48txx_def_nvwr;
97
98 todr_attach(handle);
99 }
100
101 /*
102 * Get time-of-day and convert to a `struct timeval'
103 * Return 0 on success; an error number otherwise.
104 */
105 int
106 mk48txx_gettime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt)
107 {
108 struct mk48txx_softc *sc;
109 bus_size_t clkoff;
110 int year;
111 uint8_t csr;
112
113 sc = handle->cookie;
114 clkoff = sc->sc_clkoffset;
115
116 /* enable read (stop time) */
117 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
118 csr |= MK48TXX_CSR_READ;
119 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
120
121 dt->dt_sec = bcdtobin((*sc->sc_nvrd)(sc, clkoff + MK48TXX_ISEC));
122 dt->dt_min = bcdtobin((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IMIN));
123 dt->dt_hour = bcdtobin((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IHOUR));
124 dt->dt_day = bcdtobin((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IDAY));
125 dt->dt_wday = bcdtobin((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IWDAY));
126 dt->dt_mon = bcdtobin((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IMON));
127 year = bcdtobin((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IYEAR));
128
129 if (sc->sc_flag & MK48TXX_HAVE_CENT_REG) {
130 year += 100*bcdtobin(csr & MK48TXX_CSR_CENT_MASK);
131 } else {
132 year += sc->sc_year0;
133 if (year < POSIX_BASE_YEAR &&
134 (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0)
135 year += 100;
136 }
137
138 dt->dt_year = year;
139
140 /* time wears on */
141 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
142 csr &= ~MK48TXX_CSR_READ;
143 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
144
145 return 0;
146 }
147
148 /*
149 * Set the time-of-day clock based on the value of the `struct timeval' arg.
150 * Return 0 on success; an error number otherwise.
151 */
152 int
153 mk48txx_settime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt)
154 {
155 struct mk48txx_softc *sc;
156 bus_size_t clkoff;
157 uint8_t csr;
158 int year;
159 int cent;
160
161 sc = handle->cookie;
162 clkoff = sc->sc_clkoffset;
163
164 if ((sc->sc_flag & MK48TXX_HAVE_CENT_REG) == 0) {
165 cent = 0;
166 year = dt->dt_year - sc->sc_year0;
167 if (year > 99 &&
168 (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0)
169 year -= 100;
170 } else {
171 cent = dt->dt_year / 100;
172 year = dt->dt_year % 100;
173 }
174
175 /* enable write */
176 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
177 csr |= MK48TXX_CSR_WRITE;
178 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
179
180 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ISEC, bintobcd(dt->dt_sec));
181 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IMIN, bintobcd(dt->dt_min));
182 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IHOUR, bintobcd(dt->dt_hour));
183 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IWDAY, bintobcd(dt->dt_wday));
184 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IDAY, bintobcd(dt->dt_day));
185 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IMON, bintobcd(dt->dt_mon));
186 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IYEAR, bintobcd(year));
187
188 /*
189 * If we have a century register and the century has changed
190 * update it.
191 */
192 if ((sc->sc_flag & MK48TXX_HAVE_CENT_REG)
193 && (csr & MK48TXX_CSR_CENT_MASK) != bintobcd(cent)) {
194 csr &= ~MK48TXX_CSR_CENT_MASK;
195 csr |= MK48TXX_CSR_CENT_MASK & bintobcd(cent);
196 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
197 }
198
199 /* load them up */
200 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
201 csr &= ~MK48TXX_CSR_WRITE;
202 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
203
204 return 0;
205 }
206
207 int
208 mk48txx_get_nvram_size(todr_chip_handle_t handle, bus_size_t *vp)
209 {
210 struct mk48txx_softc *sc;
211
212 sc = handle->cookie;
213 *vp = sc->sc_nvramsz;
214 return 0;
215 }
216
217 uint8_t
218 mk48txx_def_nvrd(struct mk48txx_softc *sc, int off)
219 {
220
221 return bus_space_read_1(sc->sc_bst, sc->sc_bsh, off);
222 }
223
224 void
225 mk48txx_def_nvwr(struct mk48txx_softc *sc, int off, uint8_t v)
226 {
227
228 bus_space_write_1(sc->sc_bst, sc->sc_bsh, off, v);
229 }
Cache object: 8484032ef2bdfc1d3980090166496648
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