pcf8563.c revision 1.2.4.2
1 1.2.4.2 rmind /* $NetBSD: pcf8563.c,v 1.2.4.2 2011/03/05 20:53:10 rmind Exp $ */ 2 1.2.4.2 rmind 3 1.2.4.2 rmind /* 4 1.2.4.2 rmind * Copyright (c) 2011 Jonathan A. Kollasch 5 1.2.4.2 rmind * All rights reserved. 6 1.2.4.2 rmind * 7 1.2.4.2 rmind * Redistribution and use in source and binary forms, with or without 8 1.2.4.2 rmind * modification, are permitted provided that the following conditions 9 1.2.4.2 rmind * are met: 10 1.2.4.2 rmind * 1. Redistributions of source code must retain the above copyright 11 1.2.4.2 rmind * notice, this list of conditions and the following disclaimer. 12 1.2.4.2 rmind * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.4.2 rmind * notice, this list of conditions and the following disclaimer in the 14 1.2.4.2 rmind * documentation and/or other materials provided with the distribution. 15 1.2.4.2 rmind * 16 1.2.4.2 rmind * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 1.2.4.2 rmind * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 1.2.4.2 rmind * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 1.2.4.2 rmind * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 20 1.2.4.2 rmind * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 21 1.2.4.2 rmind * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 22 1.2.4.2 rmind * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 23 1.2.4.2 rmind * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 24 1.2.4.2 rmind * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 25 1.2.4.2 rmind * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 26 1.2.4.2 rmind * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 1.2.4.2 rmind */ 28 1.2.4.2 rmind 29 1.2.4.2 rmind #include <sys/cdefs.h> 30 1.2.4.2 rmind __KERNEL_RCSID(0, "$NetBSD: pcf8563.c,v 1.2.4.2 2011/03/05 20:53:10 rmind Exp $"); 31 1.2.4.2 rmind 32 1.2.4.2 rmind #include <sys/param.h> 33 1.2.4.2 rmind #include <sys/systm.h> 34 1.2.4.2 rmind #include <sys/device.h> 35 1.2.4.2 rmind #include <sys/kernel.h> 36 1.2.4.2 rmind 37 1.2.4.2 rmind #include <dev/clock_subr.h> 38 1.2.4.2 rmind 39 1.2.4.2 rmind #include <dev/i2c/i2cvar.h> 40 1.2.4.2 rmind #include <dev/i2c/pcf8563reg.h> 41 1.2.4.2 rmind 42 1.2.4.2 rmind struct pcf8563rtc_softc { 43 1.2.4.2 rmind device_t sc_dev; 44 1.2.4.2 rmind i2c_tag_t sc_tag; 45 1.2.4.2 rmind int sc_addr; 46 1.2.4.2 rmind struct todr_chip_handle sc_todr; 47 1.2.4.2 rmind }; 48 1.2.4.2 rmind 49 1.2.4.2 rmind static int pcf8563rtc_match(device_t, cfdata_t, void *); 50 1.2.4.2 rmind static void pcf8563rtc_attach(device_t, device_t, void *); 51 1.2.4.2 rmind 52 1.2.4.2 rmind CFATTACH_DECL_NEW(pcf8563rtc, sizeof(struct pcf8563rtc_softc), 53 1.2.4.2 rmind pcf8563rtc_match, pcf8563rtc_attach, NULL, NULL); 54 1.2.4.2 rmind 55 1.2.4.2 rmind static int pcf8563rtc_clock_read(struct pcf8563rtc_softc *, struct clock_ymdhms *); 56 1.2.4.2 rmind static int pcf8563rtc_clock_write(struct pcf8563rtc_softc *, struct clock_ymdhms *); 57 1.2.4.2 rmind static int pcf8563rtc_gettime(struct todr_chip_handle *, struct clock_ymdhms *); 58 1.2.4.2 rmind static int pcf8563rtc_settime(struct todr_chip_handle *, struct clock_ymdhms *); 59 1.2.4.2 rmind 60 1.2.4.2 rmind static int 61 1.2.4.2 rmind pcf8563rtc_match(device_t parent, cfdata_t cf, void *aux) 62 1.2.4.2 rmind { 63 1.2.4.2 rmind struct i2c_attach_args *ia = aux; 64 1.2.4.2 rmind 65 1.2.4.2 rmind if (ia->ia_addr == PCF8563_ADDR) 66 1.2.4.2 rmind return 1; 67 1.2.4.2 rmind 68 1.2.4.2 rmind return 0; 69 1.2.4.2 rmind } 70 1.2.4.2 rmind 71 1.2.4.2 rmind static void 72 1.2.4.2 rmind pcf8563rtc_attach(device_t parent, device_t self, void *aux) 73 1.2.4.2 rmind { 74 1.2.4.2 rmind struct pcf8563rtc_softc *sc = device_private(self); 75 1.2.4.2 rmind struct i2c_attach_args *ia = aux; 76 1.2.4.2 rmind 77 1.2.4.2 rmind aprint_naive(": Real-time Clock\n"); 78 1.2.4.2 rmind aprint_normal(": NXP PCF8563 Real-time Clock\n"); 79 1.2.4.2 rmind 80 1.2.4.2 rmind sc->sc_dev = self; 81 1.2.4.2 rmind sc->sc_tag = ia->ia_tag; 82 1.2.4.2 rmind sc->sc_addr = ia->ia_addr; 83 1.2.4.2 rmind sc->sc_todr.cookie = sc; 84 1.2.4.2 rmind sc->sc_todr.todr_gettime_ymdhms = pcf8563rtc_gettime; 85 1.2.4.2 rmind sc->sc_todr.todr_settime_ymdhms = pcf8563rtc_settime; 86 1.2.4.2 rmind sc->sc_todr.todr_setwen = NULL; 87 1.2.4.2 rmind 88 1.2.4.2 rmind todr_attach(&sc->sc_todr); 89 1.2.4.2 rmind } 90 1.2.4.2 rmind 91 1.2.4.2 rmind static int 92 1.2.4.2 rmind pcf8563rtc_gettime(struct todr_chip_handle *ch, struct clock_ymdhms *dt) 93 1.2.4.2 rmind { 94 1.2.4.2 rmind struct pcf8563rtc_softc *sc = ch->cookie; 95 1.2.4.2 rmind 96 1.2.4.2 rmind if (pcf8563rtc_clock_read(sc, dt) == 0) 97 1.2.4.2 rmind return -1; 98 1.2.4.2 rmind 99 1.2.4.2 rmind return 0; 100 1.2.4.2 rmind } 101 1.2.4.2 rmind 102 1.2.4.2 rmind static int 103 1.2.4.2 rmind pcf8563rtc_settime(struct todr_chip_handle *ch, struct clock_ymdhms *dt) 104 1.2.4.2 rmind { 105 1.2.4.2 rmind struct pcf8563rtc_softc *sc = ch->cookie; 106 1.2.4.2 rmind 107 1.2.4.2 rmind if (pcf8563rtc_clock_write(sc, dt) == 0) 108 1.2.4.2 rmind return -1; 109 1.2.4.2 rmind 110 1.2.4.2 rmind return 0; 111 1.2.4.2 rmind } 112 1.2.4.2 rmind 113 1.2.4.2 rmind static int 114 1.2.4.2 rmind pcf8563rtc_clock_read(struct pcf8563rtc_softc *sc, struct clock_ymdhms *dt) 115 1.2.4.2 rmind { 116 1.2.4.2 rmind uint8_t bcd[PCF8563_NREGS]; 117 1.2.4.2 rmind uint8_t reg = PCF8563_R_CS1; 118 1.2.4.2 rmind 119 1.2.4.2 rmind if (iic_acquire_bus(sc->sc_tag, I2C_F_POLL)) { 120 1.2.4.2 rmind device_printf(sc->sc_dev, "acquire bus for read failed\n"); 121 1.2.4.2 rmind return 0; 122 1.2.4.2 rmind } 123 1.2.4.2 rmind 124 1.2.4.2 rmind if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, ®, 1, 125 1.2.4.2 rmind &bcd[reg], PCF8563_R_YEAR - reg + 1, I2C_F_POLL)) { 126 1.2.4.2 rmind iic_release_bus(sc->sc_tag, I2C_F_POLL); 127 1.2.4.2 rmind device_printf(sc->sc_dev, "read failed\n"); 128 1.2.4.2 rmind return 0; 129 1.2.4.2 rmind } 130 1.2.4.2 rmind 131 1.2.4.2 rmind iic_release_bus(sc->sc_tag, I2C_F_POLL); 132 1.2.4.2 rmind 133 1.2.4.2 rmind dt->dt_sec = FROMBCD(bcd[PCF8563_R_SECOND] & PCF8563_M_SECOND); 134 1.2.4.2 rmind dt->dt_min = FROMBCD(bcd[PCF8563_R_MINUTE] & PCF8563_M_MINUTE); 135 1.2.4.2 rmind dt->dt_hour = FROMBCD(bcd[PCF8563_R_HOUR] & PCF8563_M_HOUR); 136 1.2.4.2 rmind dt->dt_day = FROMBCD(bcd[PCF8563_R_DAY] & PCF8563_M_DAY); 137 1.2.4.2 rmind dt->dt_mon = FROMBCD(bcd[PCF8563_R_MONTH] & PCF8563_M_MONTH); 138 1.2.4.2 rmind dt->dt_year = FROMBCD(bcd[PCF8563_R_YEAR] & PCF8563_M_YEAR); 139 1.2.4.2 rmind dt->dt_year += 2000; 140 1.2.4.2 rmind 141 1.2.4.2 rmind return 1; 142 1.2.4.2 rmind } 143 1.2.4.2 rmind 144 1.2.4.2 rmind static int 145 1.2.4.2 rmind pcf8563rtc_clock_write(struct pcf8563rtc_softc *sc, struct clock_ymdhms *dt) 146 1.2.4.2 rmind { 147 1.2.4.2 rmind uint8_t bcd[PCF8563_NREGS]; 148 1.2.4.2 rmind uint8_t reg = PCF8563_R_SECOND; 149 1.2.4.2 rmind 150 1.2.4.2 rmind bcd[PCF8563_R_SECOND] = TOBCD(dt->dt_sec); 151 1.2.4.2 rmind bcd[PCF8563_R_MINUTE] = TOBCD(dt->dt_min); 152 1.2.4.2 rmind bcd[PCF8563_R_HOUR] = TOBCD(dt->dt_hour); 153 1.2.4.2 rmind bcd[PCF8563_R_DAY] = TOBCD(dt->dt_day); 154 1.2.4.2 rmind bcd[PCF8563_R_WEEKDAY] = TOBCD(dt->dt_wday); 155 1.2.4.2 rmind bcd[PCF8563_R_MONTH] = TOBCD(dt->dt_mon); 156 1.2.4.2 rmind bcd[PCF8563_R_YEAR] = TOBCD(dt->dt_year % 100); 157 1.2.4.2 rmind 158 1.2.4.2 rmind if (iic_acquire_bus(sc->sc_tag, I2C_F_POLL)) { 159 1.2.4.2 rmind device_printf(sc->sc_dev, "acquire bus for write failed\n"); 160 1.2.4.2 rmind return 0; 161 1.2.4.2 rmind } 162 1.2.4.2 rmind 163 1.2.4.2 rmind if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, ®, 1, 164 1.2.4.2 rmind &bcd[reg], PCF8563_R_YEAR - reg + 1, I2C_F_POLL)) { 165 1.2.4.2 rmind iic_release_bus(sc->sc_tag, I2C_F_POLL); 166 1.2.4.2 rmind device_printf(sc->sc_dev, "write failed\n"); 167 1.2.4.2 rmind return 0; 168 1.2.4.2 rmind } 169 1.2.4.2 rmind 170 1.2.4.2 rmind iic_release_bus(sc->sc_tag, I2C_F_POLL); 171 1.2.4.2 rmind 172 1.2.4.2 rmind return 1; 173 1.2.4.2 rmind } 174
Indexes created Mon Oct 27 04:09:48 GMT 2025