add Haoyu Microelectronic HYM8563 RTC driver
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jmcneill
parent
8e2a6dcb55
commit
44062b8218
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@ -1,4 +1,4 @@
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# $NetBSD: files.i2c,v 1.62 2015/01/01 17:33:18 jmcneill Exp $
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# $NetBSD: files.i2c,v 1.63 2015/01/11 15:22:26 jmcneill Exp $
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obsolete defflag opt_i2cbus.h I2C_SCAN
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define i2cbus { }
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@ -245,3 +245,8 @@ file dev/i2c/ac100.c ac100ic needs-flag
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device act8846pm
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attach act8846pm at iic
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file dev/i2c/act8846.c act8846pm needs-flag
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# Haoyu Microelectronic HYM8563 RTC
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device hymrtc
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attach hymrtc at iic
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file dev/i2c/hym8563.c hymrtc
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@ -0,0 +1,210 @@
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/* $NetBSD: hym8563.c,v 1.1 2015/01/11 15:22:26 jmcneill Exp $ */
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/*-
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* Copyright (c) 2015 Jared D. McNeill <jmcneill@invisible.ca>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: hym8563.c,v 1.1 2015/01/11 15:22:26 jmcneill Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/conf.h>
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#include <sys/bus.h>
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#include <sys/kmem.h>
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#include <dev/clock_subr.h>
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#include <dev/i2c/i2cvar.h>
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#define HYM_CSR1_REG 0x00
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#define HYM_CSR2_REG 0x01
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#define HYM_SECONDS_REG 0x02
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#define HYM_MINUTES_REG 0x03
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#define HYM_HOURS_REG 0x04
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#define HYM_DAYS_REG 0x05
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#define HYM_WEEKDAYS_REG 0x06
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#define HYM_MONTHS_REG 0x07
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#define HYM_YEARS_REG 0x08
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#define HYM_MINUTE_ALARM_REG 0x09
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#define HYM_HOUR_ALARM_REG 0x0a
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#define HYM_DATE_ALARM_REG 0x0b
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#define HYM_WEEKDAY_ALARM_REG 0x0c
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#define HYM_CLKOUT_CTRL_REG 0x0d
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#define HYM_TIMER_CTRL_REG 0x0e
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#define HYM_TIMER_COUNTDOWN_REG 0x0f
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#define HYM_CSR1_TEST __BIT(7)
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#define HYM_CSR1_STOP __BIT(5)
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#define HYM_CSR1_TESTC __BIT(3)
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#define HYM_CSR2_TITP __BIT(4)
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#define HYM_CSR2_AF __BIT(3)
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#define HYM_CSR2_TF __BIT(2)
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#define HYM_CSR2_AIE __BIT(1)
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#define HYM_CSR2_TIE __BIT(0)
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#define HYM_SECONDS_VL __BIT(7)
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#define HYM_SECONDS_MASK __BITS(6,0)
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#define HYM_MINUTES_MASK __BITS(6,0)
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#define HYM_HOURS_MASK __BITS(5,0)
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#define HYM_DAYS_MASK __BITS(5,0)
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#define HYM_WEEKDAYS_MASK __BITS(2,0)
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#define HYM_MONTHS_C __BIT(7)
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#define HYM_MONTHS_MASK __BITS(4,0)
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#define HYM_YEARS_MASK __BITS(7,0)
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#define HYM_TODR_OFF HYM_SECONDS_REG
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#define HYM_TODR_LEN (HYM_YEARS_REG - HYM_SECONDS_REG + 1)
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#define HYM_TODR_SECONDS (HYM_SECONDS_REG - HYM_TODR_OFF)
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#define HYM_TODR_MINUTES (HYM_MINUTES_REG - HYM_TODR_OFF)
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#define HYM_TODR_HOURS (HYM_HOURS_REG - HYM_TODR_OFF)
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#define HYM_TODR_DAYS (HYM_DAYS_REG - HYM_TODR_OFF)
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#define HYM_TODR_WEEKDAYS (HYM_WEEKDAYS_REG - HYM_TODR_OFF)
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#define HYM_TODR_MONTHS (HYM_MONTHS_REG - HYM_TODR_OFF)
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#define HYM_TODR_YEARS (HYM_YEARS_REG - HYM_TODR_OFF)
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struct hymrtc_softc {
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device_t sc_dev;
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i2c_tag_t sc_i2c;
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i2c_addr_t sc_addr;
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struct todr_chip_handle sc_todr;
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};
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static int hymrtc_match(device_t, cfdata_t, void *);
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static void hymrtc_attach(device_t, device_t, void *);
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static int hymrtc_rtc_gettime(todr_chip_handle_t, struct clock_ymdhms *);
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static int hymrtc_rtc_settime(todr_chip_handle_t, struct clock_ymdhms *);
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CFATTACH_DECL_NEW(hymrtc, sizeof(struct hymrtc_softc),
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hymrtc_match, hymrtc_attach, NULL, NULL);
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static int
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hymrtc_match(device_t parent, cfdata_t match, void *aux)
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{
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struct i2c_attach_args *ia = aux;
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uint8_t val;
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int error;
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iic_acquire_bus(ia->ia_tag, I2C_F_POLL);
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error = iic_smbus_read_byte(ia->ia_tag, ia->ia_addr, HYM_CSR1_REG,
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&val, I2C_F_POLL);
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iic_release_bus(ia->ia_tag, I2C_F_POLL);
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return error == 0;
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}
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static void
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hymrtc_attach(device_t parent, device_t self, void *aux)
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{
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struct hymrtc_softc *sc = device_private(self);
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struct i2c_attach_args *ia = aux;
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sc->sc_dev = self;
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sc->sc_i2c = ia->ia_tag;
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sc->sc_addr = ia->ia_addr;
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aprint_naive("\n");
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aprint_normal(": RTC\n");
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iic_acquire_bus(sc->sc_i2c, I2C_F_POLL);
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iic_smbus_write_byte(sc->sc_i2c, sc->sc_addr, HYM_CSR1_REG, 0, 0);
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iic_smbus_write_byte(sc->sc_i2c, sc->sc_addr, HYM_CSR2_REG, 0, 0);
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iic_release_bus(sc->sc_i2c, I2C_F_POLL);
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sc->sc_todr.todr_gettime_ymdhms = hymrtc_rtc_gettime;
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sc->sc_todr.todr_settime_ymdhms = hymrtc_rtc_settime;
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sc->sc_todr.cookie = sc;
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todr_attach(&sc->sc_todr);
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}
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static int
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hymrtc_rtc_gettime(todr_chip_handle_t tch, struct clock_ymdhms *dt)
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{
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struct hymrtc_softc *sc = tch->cookie;
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uint8_t data[HYM_TODR_LEN];
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int error;
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memset(data, 0, HYM_TODR_LEN);
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iic_acquire_bus(sc->sc_i2c, 0);
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error = iic_smbus_block_read(sc->sc_i2c, sc->sc_addr,
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HYM_TODR_OFF, data, HYM_TODR_LEN, cold ? I2C_F_POLL : 0);
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iic_release_bus(sc->sc_i2c, 0);
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if (error)
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return error;
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/* Voltage low flag, RTC data may be invalid */
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if (data[HYM_TODR_SECONDS] & HYM_SECONDS_VL)
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return ENODEV;
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dt->dt_year = 1900 + bcdtobin(data[HYM_TODR_YEARS] & HYM_YEARS_MASK);
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if (data[HYM_TODR_MONTHS] & HYM_MONTHS_C)
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dt->dt_year += 100;
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dt->dt_mon = bcdtobin(data[HYM_TODR_MONTHS] & HYM_MONTHS_MASK);
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dt->dt_day = bcdtobin(data[HYM_TODR_DAYS] & HYM_DAYS_MASK);
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dt->dt_wday = bcdtobin(data[HYM_TODR_WEEKDAYS] & HYM_WEEKDAYS_MASK);
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dt->dt_hour = bcdtobin(data[HYM_TODR_HOURS] & HYM_HOURS_MASK);
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dt->dt_min = bcdtobin(data[HYM_TODR_MINUTES] & HYM_MINUTES_MASK);
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dt->dt_sec = bcdtobin(data[HYM_TODR_SECONDS] & HYM_SECONDS_MASK);
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return 0;
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}
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static int
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hymrtc_rtc_settime(todr_chip_handle_t tch, struct clock_ymdhms *dt)
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{
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struct hymrtc_softc *sc = tch->cookie;
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uint8_t data[HYM_TODR_LEN];
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int error;
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data[HYM_TODR_SECONDS] = bintobcd(dt->dt_sec) & HYM_SECONDS_MASK;
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data[HYM_TODR_MINUTES] = bintobcd(dt->dt_min) & HYM_MINUTES_MASK;
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data[HYM_TODR_HOURS] = bintobcd(dt->dt_hour) & HYM_HOURS_MASK;
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data[HYM_TODR_DAYS] = bintobcd(dt->dt_day) & HYM_DAYS_MASK;
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data[HYM_TODR_WEEKDAYS] = bintobcd(dt->dt_wday) & HYM_WEEKDAYS_MASK;
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data[HYM_TODR_MONTHS] = bintobcd(dt->dt_mon) & HYM_MONTHS_MASK;
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data[HYM_TODR_YEARS] = bintobcd(dt->dt_year % 100) & HYM_YEARS_MASK;
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if (dt->dt_year >= 2000)
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data[HYM_TODR_MONTHS] |= HYM_MONTHS_C;
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iic_acquire_bus(sc->sc_i2c, 0);
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error = iic_smbus_block_write(sc->sc_i2c, sc->sc_addr,
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HYM_TODR_OFF, data, HYM_TODR_LEN, cold ? I2C_F_POLL : 0);
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iic_release_bus(sc->sc_i2c, 0);
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return error;
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}
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