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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