msm6242b.c revision 1.1 1 1.1 rkujawa /* $NetBSD: msm6242b.c,v 1.1 2012/11/14 01:52:48 rkujawa Exp $ */
2 1.1 rkujawa
3 1.1 rkujawa /*-
4 1.1 rkujawa * Copyright (c) 2012 The NetBSD Foundation, Inc.
5 1.1 rkujawa * All rights reserved.
6 1.1 rkujawa *
7 1.1 rkujawa * This code is derived from software contributed to The NetBSD Foundation
8 1.1 rkujawa * by Radoslaw Kujawa.
9 1.1 rkujawa *
10 1.1 rkujawa * Redistribution and use in source and binary forms, with or without
11 1.1 rkujawa * modification, are permitted provided that the following conditions
12 1.1 rkujawa * are met:
13 1.1 rkujawa * 1. Redistributions of source code must retain the above copyright
14 1.1 rkujawa * notice, this list of conditions and the following disclaimer.
15 1.1 rkujawa * 2. Redistributions in binary form must reproduce the above copyright
16 1.1 rkujawa * notice, this list of conditions and the following disclaimer in the
17 1.1 rkujawa * documentation and/or other materials provided with the distribution.
18 1.1 rkujawa *
19 1.1 rkujawa * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 1.1 rkujawa * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 1.1 rkujawa * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 1.1 rkujawa * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 1.1 rkujawa * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 1.1 rkujawa * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 1.1 rkujawa * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 1.1 rkujawa * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 1.1 rkujawa * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 1.1 rkujawa * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 1.1 rkujawa * POSSIBILITY OF SUCH DAMAGE.
30 1.1 rkujawa */
31 1.1 rkujawa
32 1.1 rkujawa #include <sys/cdefs.h>
33 1.1 rkujawa
34 1.1 rkujawa #include <sys/param.h>
35 1.1 rkujawa #include <sys/device.h>
36 1.1 rkujawa #include <sys/bus.h>
37 1.1 rkujawa
38 1.1 rkujawa #include <dev/clock_subr.h>
39 1.1 rkujawa
40 1.1 rkujawa #include <dev/ic/msm6242bvar.h>
41 1.1 rkujawa #include <dev/ic/msm6242breg.h>
42 1.1 rkujawa
43 1.1 rkujawa /* #define MSM6242B_DEBUG 1 */
44 1.1 rkujawa
45 1.1 rkujawa static int msm6242b_gettime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *);
46 1.1 rkujawa int msm6242b_settime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *);
47 1.1 rkujawa
48 1.1 rkujawa bool msm6242b_hold(struct msm6242b_softc *sc);
49 1.1 rkujawa void msm6242b_free(struct msm6242b_softc *sc);
50 1.1 rkujawa static uint8_t msm6242b_read(struct msm6242b_softc *, uint8_t);
51 1.1 rkujawa static void msm6242b_write(struct msm6242b_softc *, uint8_t, uint8_t);
52 1.1 rkujawa static void msm6242b_set(struct msm6242b_softc *, uint8_t, uint8_t);
53 1.1 rkujawa static void msm6242b_unset(struct msm6242b_softc *, uint8_t, uint8_t);
54 1.1 rkujawa
55 1.1 rkujawa void
56 1.1 rkujawa msm6242b_attach(struct msm6242b_softc *sc)
57 1.1 rkujawa {
58 1.1 rkujawa struct clock_ymdhms dt;
59 1.1 rkujawa
60 1.1 rkujawa todr_chip_handle_t handle;
61 1.1 rkujawa aprint_normal(": OKI MSM6242B\n");
62 1.1 rkujawa
63 1.1 rkujawa handle = &sc->sc_handle;
64 1.1 rkujawa handle->cookie = sc;
65 1.1 rkujawa handle->todr_gettime = NULL;
66 1.1 rkujawa handle->todr_settime = NULL;
67 1.1 rkujawa handle->todr_gettime_ymdhms = msm6242b_gettime_ymdhms;
68 1.1 rkujawa handle->todr_settime_ymdhms = msm6242b_settime_ymdhms;
69 1.1 rkujawa handle->todr_setwen = NULL;
70 1.1 rkujawa
71 1.1 rkujawa if (msm6242b_gettime_ymdhms(handle, &dt) != 0) {
72 1.1 rkujawa aprint_error_dev(sc->sc_dev, "RTC does not work correctly\n");
73 1.1 rkujawa return;
74 1.1 rkujawa }
75 1.1 rkujawa
76 1.1 rkujawa #ifdef MSM6242B_DEBUG
77 1.1 rkujawa aprint_normal_dev(sc->sc_dev, "the time is %d %d %d %d %d %d\n",
78 1.1 rkujawa dt.dt_year, dt.dt_mon, dt.dt_day, dt.dt_hour, dt.dt_min, dt.dt_sec);
79 1.1 rkujawa #endif
80 1.1 rkujawa /* MSM6242B_DEBUG */
81 1.1 rkujawa todr_attach(handle);
82 1.1 rkujawa }
83 1.1 rkujawa
84 1.1 rkujawa static int
85 1.1 rkujawa msm6242b_gettime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt)
86 1.1 rkujawa {
87 1.1 rkujawa struct msm6242b_softc *sc;
88 1.1 rkujawa
89 1.1 rkujawa sc = handle->cookie;
90 1.1 rkujawa /* XXX: splsched(); */
91 1.1 rkujawa
92 1.1 rkujawa if(!msm6242b_hold(sc))
93 1.1 rkujawa return (ENXIO);
94 1.1 rkujawa
95 1.1 rkujawa dt->dt_sec = msm6242b_read(sc, MSM6242B_10SECOND) * 10 +
96 1.1 rkujawa msm6242b_read(sc, MSM6242B_1SECOND);
97 1.1 rkujawa dt->dt_min = msm6242b_read(sc, MSM6242B_10MINUTE) * 10 +
98 1.1 rkujawa msm6242b_read(sc, MSM6242B_1MINUTE);
99 1.1 rkujawa dt->dt_hour = (msm6242b_read(sc, MSM6242B_10HOUR_PMAM) &
100 1.1 rkujawa MSM6242B_10HOUR_MASK) * 10 + msm6242b_read(sc, MSM6242B_1HOUR);
101 1.1 rkujawa dt->dt_day = msm6242b_read(sc, MSM6242B_10DAY) * 10 +
102 1.1 rkujawa msm6242b_read(sc, MSM6242B_1DAY);
103 1.1 rkujawa dt->dt_mon = msm6242b_read(sc, MSM6242B_10MONTH) * 10 +
104 1.1 rkujawa msm6242b_read(sc, MSM6242B_1MONTH);
105 1.1 rkujawa dt->dt_year = msm6242b_read(sc, MSM6242B_10YEAR) * 10 +
106 1.1 rkujawa msm6242b_read(sc, MSM6242B_1YEAR);
107 1.1 rkujawa dt->dt_wday = msm6242b_read(sc, MSM6242B_WEEK);
108 1.1 rkujawa
109 1.1 rkujawa #ifdef MSM6242B_DEBUG
110 1.1 rkujawa aprint_normal_dev(sc->sc_dev, "the time is %d %d %d %d %d %d\n",
111 1.1 rkujawa dt->dt_year, dt->dt_mon, dt->dt_day, dt->dt_hour, dt->dt_min, dt->dt_sec);
112 1.1 rkujawa #endif
113 1.1 rkujawa
114 1.1 rkujawa /* handle 12h mode */
115 1.1 rkujawa if ((msm6242b_read(sc, MSM6242B_CONTROL_F) &
116 1.1 rkujawa MSM6242B_CONTROL_F_24H) == 0) {
117 1.1 rkujawa if ((msm6242b_read(sc, MSM6242B_10HOUR_PMAM) &
118 1.1 rkujawa MSM6242B_PMAM_BIT) == 0 && dt->dt_hour == 12)
119 1.1 rkujawa dt->dt_hour = 0;
120 1.1 rkujawa else if ((msm6242b_read(sc, MSM6242B_10HOUR_PMAM) &
121 1.1 rkujawa MSM6242B_PMAM_BIT) && dt->dt_hour != 12);
122 1.1 rkujawa dt->dt_hour += 12;
123 1.1 rkujawa }
124 1.1 rkujawa
125 1.1 rkujawa msm6242b_free(sc);
126 1.1 rkujawa
127 1.1 rkujawa dt->dt_year += MSM6242B_BASE_YEAR;
128 1.1 rkujawa if (dt->dt_year < POSIX_BASE_YEAR)
129 1.1 rkujawa dt->dt_year += 100;
130 1.1 rkujawa
131 1.1 rkujawa if ((dt->dt_hour > 23) ||
132 1.1 rkujawa (dt->dt_day > 31) ||
133 1.1 rkujawa (dt->dt_mon > 12) ||
134 1.1 rkujawa (dt->dt_year > 2036))
135 1.1 rkujawa return (EINVAL);
136 1.1 rkujawa
137 1.1 rkujawa return 0;
138 1.1 rkujawa }
139 1.1 rkujawa
140 1.1 rkujawa bool
141 1.1 rkujawa msm6242b_hold(struct msm6242b_softc *sc)
142 1.1 rkujawa {
143 1.1 rkujawa int try;
144 1.1 rkujawa
145 1.1 rkujawa #define TRY_MAX 10
146 1.1 rkujawa for (try = 0; try < TRY_MAX; try++) {
147 1.1 rkujawa msm6242b_set(sc, MSM6242B_CONTROL_D, MSM6242B_CONTROL_D_HOLD);
148 1.1 rkujawa if (msm6242b_read(sc, MSM6242B_CONTROL_D)
149 1.1 rkujawa & MSM6242B_CONTROL_D_BUSY) {
150 1.1 rkujawa aprint_normal_dev(sc->sc_dev, "gotta idle\n");
151 1.1 rkujawa msm6242b_unset(sc, MSM6242B_CONTROL_D,
152 1.1 rkujawa MSM6242B_CONTROL_D_HOLD);
153 1.1 rkujawa delay(70);
154 1.1 rkujawa } else {
155 1.1 rkujawa aprint_normal_dev(sc->sc_dev, "not busy\n");
156 1.1 rkujawa break;
157 1.1 rkujawa }
158 1.1 rkujawa }
159 1.1 rkujawa
160 1.1 rkujawa if (try == TRY_MAX) {
161 1.1 rkujawa aprint_error_dev(sc->sc_dev, "can't hold the chip\n");
162 1.1 rkujawa return false;
163 1.1 rkujawa }
164 1.1 rkujawa return true;
165 1.1 rkujawa }
166 1.1 rkujawa
167 1.1 rkujawa void
168 1.1 rkujawa msm6242b_free(struct msm6242b_softc *sc)
169 1.1 rkujawa {
170 1.1 rkujawa msm6242b_unset(sc, MSM6242B_CONTROL_D, MSM6242B_CONTROL_D_HOLD);
171 1.1 rkujawa }
172 1.1 rkujawa
173 1.1 rkujawa static uint8_t
174 1.1 rkujawa msm6242b_read(struct msm6242b_softc *sc, uint8_t reg)
175 1.1 rkujawa {
176 1.1 rkujawa uint8_t r;
177 1.1 rkujawa r = bus_space_read_1(sc->sc_iot, sc->sc_ioh, reg) & MSM6242B_MASK;
178 1.1 rkujawa return r;
179 1.1 rkujawa }
180 1.1 rkujawa
181 1.1 rkujawa static void
182 1.1 rkujawa msm6242b_write(struct msm6242b_softc *sc, uint8_t reg, uint8_t val)
183 1.1 rkujawa {
184 1.1 rkujawa bus_space_write_1(sc->sc_iot, sc->sc_ioh, reg, val);
185 1.1 rkujawa }
186 1.1 rkujawa
187 1.1 rkujawa static void
188 1.1 rkujawa msm6242b_set(struct msm6242b_softc *sc, uint8_t reg, uint8_t bits)
189 1.1 rkujawa {
190 1.1 rkujawa uint8_t v;
191 1.1 rkujawa v = msm6242b_read(sc, reg) | bits;
192 1.1 rkujawa msm6242b_write(sc, reg, v);
193 1.1 rkujawa }
194 1.1 rkujawa
195 1.1 rkujawa static void
196 1.1 rkujawa msm6242b_unset(struct msm6242b_softc *sc, uint8_t reg, uint8_t bits)
197 1.1 rkujawa {
198 1.1 rkujawa uint8_t v;
199 1.1 rkujawa v = msm6242b_read(sc, reg) & ~bits;
200 1.1 rkujawa msm6242b_write(sc, reg, v);
201 1.1 rkujawa }
202 1.1 rkujawa
203 1.1 rkujawa int
204 1.1 rkujawa msm6242b_settime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt)
205 1.1 rkujawa {
206 1.1 rkujawa struct msm6242b_softc *sc;
207 1.1 rkujawa int ampm;
208 1.1 rkujawa /* XXX: splsched(); */
209 1.1 rkujawa
210 1.1 rkujawa sc = handle->cookie;
211 1.1 rkujawa
212 1.1 rkujawa if(!msm6242b_hold(sc))
213 1.1 rkujawa return (ENXIO);
214 1.1 rkujawa
215 1.1 rkujawa ampm = 0;
216 1.1 rkujawa if ((msm6242b_read(sc, MSM6242B_CONTROL_F) &
217 1.1 rkujawa MSM6242B_CONTROL_F_24H) == 0) {
218 1.1 rkujawa if (dt->dt_hour >= 12) {
219 1.1 rkujawa ampm = MSM6242B_CONTROL_F_24H;
220 1.1 rkujawa if (dt->dt_hour != 12)
221 1.1 rkujawa dt->dt_hour -= 12;
222 1.1 rkujawa } else if (dt->dt_hour == 0) {
223 1.1 rkujawa dt->dt_hour = 12;
224 1.1 rkujawa }
225 1.1 rkujawa }
226 1.1 rkujawa
227 1.1 rkujawa msm6242b_write(sc, MSM6242B_10HOUR_PMAM, (dt->dt_hour / 10) | ampm);
228 1.1 rkujawa msm6242b_write(sc, MSM6242B_1HOUR, dt->dt_hour % 10);
229 1.1 rkujawa msm6242b_write(sc, MSM6242B_10SECOND, dt->dt_sec / 10);
230 1.1 rkujawa msm6242b_write(sc, MSM6242B_1SECOND, dt->dt_sec % 10);
231 1.1 rkujawa msm6242b_write(sc, MSM6242B_10MINUTE, dt->dt_min / 10);
232 1.1 rkujawa msm6242b_write(sc, MSM6242B_1MINUTE, dt->dt_min % 10);
233 1.1 rkujawa msm6242b_write(sc, MSM6242B_10DAY, dt->dt_day / 10);
234 1.1 rkujawa msm6242b_write(sc, MSM6242B_1DAY, dt->dt_day % 10);
235 1.1 rkujawa msm6242b_write(sc, MSM6242B_10MONTH, dt->dt_mon / 10);
236 1.1 rkujawa msm6242b_write(sc, MSM6242B_1MONTH, dt->dt_mon % 10);
237 1.1 rkujawa msm6242b_write(sc, MSM6242B_10YEAR, (dt->dt_mon / 10) % 10);
238 1.1 rkujawa msm6242b_write(sc, MSM6242B_1YEAR, dt->dt_mon % 10);
239 1.1 rkujawa msm6242b_write(sc, MSM6242B_WEEK, dt->dt_wday);
240 1.1 rkujawa
241 1.1 rkujawa msm6242b_free(sc);
242 1.1 rkujawa
243 1.1 rkujawa return 0;
244 1.1 rkujawa }
245 1.1 rkujawa
246