Date: Tue, 21 Aug 2012 17:31:10 +0000 (UTC) From: Hiroki Sato <hrs@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r239507 - in head/sys: conf dev/iicbus Message-ID: <201208211731.q7LHVABd075115@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: hrs Date: Tue Aug 21 17:31:10 2012 New Revision: 239507 URL: http://svn.freebsd.org/changeset/base/239507 Log: Add s35390a_rtc(4) driver for Seiko Instruments S-35390A RTC. Submitted by: Yusuke Tanaka Added: head/sys/dev/iicbus/s35390a.c (contents, props changed) Modified: head/sys/conf/NOTES head/sys/conf/files Modified: head/sys/conf/NOTES ============================================================================== --- head/sys/conf/NOTES Tue Aug 21 17:06:36 2012 (r239506) +++ head/sys/conf/NOTES Tue Aug 21 17:31:10 2012 (r239507) @@ -2555,10 +2555,12 @@ device iicoc # OpenCores I2C controlle # ds133x Dallas Semiconductor DS1337, DS1338 and DS1339 RTC # ds1374 Dallas Semiconductor DS1374 RTC # ds1672 Dallas Semiconductor DS1672 RTC +# s35390a Seiko Instruments S-35390A RTC # device ds133x device ds1374 device ds1672 +device s35390a # Parallel-Port Bus # Modified: head/sys/conf/files ============================================================================== --- head/sys/conf/files Tue Aug 21 17:06:36 2012 (r239506) +++ head/sys/conf/files Tue Aug 21 17:31:10 2012 (r239507) @@ -1315,6 +1315,7 @@ dev/iicbus/iicsmb.c optional iicsmb dependency "iicbus_if.h" dev/iicbus/iicoc.c optional iicoc dev/iicbus/pcf8563.c optional pcf8563 +dev/iicbus/s35390a.c optional s35390a dev/iir/iir.c optional iir dev/iir/iir_ctrl.c optional iir dev/iir/iir_pci.c optional iir pci Added: head/sys/dev/iicbus/s35390a.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/dev/iicbus/s35390a.c Tue Aug 21 17:31:10 2012 (r239507) @@ -0,0 +1,333 @@ +/*- + * Copyright (c) 2012 Yusuke Tanaka + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/*- + * Copyright (c) 2011 Frank Wille. + * All rights reserved. + * + * Written by Frank Wille for The NetBSD Project. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * Driver for Seiko Instruments S-35390A Real-time Clock + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/clock.h> +#include <sys/kernel.h> +#include <sys/module.h> + +#include <dev/iicbus/iicbus.h> +#include <dev/iicbus/iiconf.h> + +#include "clock_if.h" +#include "iicbus_if.h" + +#define S390_DEVNAME "s35390a_rtc" +#define S390_DEVCODE 0x6 /* 0110 */ +/* + * S-35390A uses 4-bit device code + 3-bit command in the slave address + * field. The possible combination is 0x60-0x6f including the R/W bit. + * 0x60 means an write access to status register 1. + */ +#define S390_ADDR (S390_DEVCODE << 4) + +/* Registers are encoded into the slave address */ +#define S390_STATUS1 (0 << 1) +#define S390_STATUS2 (1 << 1) +#define S390_REALTIME1 (2 << 1) +#define S390_REALTIME2 (3 << 1) +#define S390_INT1_1 (4 << 1) +#define S390_INT1_2 (5 << 1) +#define S390_CLOCKADJ (6 << 1) +#define S390_FREE (7 << 1) + +/* Status1 bits */ +#define S390_ST1_POC (1 << 7) +#define S390_ST1_BLD (1 << 6) +#define S390_ST1_24H (1 << 1) +#define S390_ST1_RESET (1 << 0) + +/* Status2 bits */ +#define S390_ST2_TEST (1 << 7) + +/* Realtime1 data bytes */ +#define S390_RT1_NBYTES 7 +#define S390_RT1_YEAR 0 +#define S390_RT1_MONTH 1 +#define S390_RT1_DAY 2 +#define S390_RT1_WDAY 3 +#define S390_RT1_HOUR 4 +#define S390_RT1_MINUTE 5 +#define S390_RT1_SECOND 6 + +struct s390rtc_softc { + device_t sc_dev; + uint16_t sc_addr; +}; + +/* + * S-35390A interprets bits in each byte on SDA in reverse order. + * bitreverse() reverses the bits in uint8_t. + */ +static const uint8_t nibbletab[] = { + /* 0x0 0000 -> 0000 */ 0x0, + /* 0x1 0001 -> 1000 */ 0x8, + /* 0x2 0010 -> 0100 */ 0x4, + /* 0x3 0011 -> 1100 */ 0xc, + /* 0x4 0100 -> 0010 */ 0x2, + /* 0x5 0101 -> 1010 */ 0xa, + /* 0x6 0110 -> 0110 */ 0x6, + /* 0x7 0111 -> 1110 */ 0xe, + /* 0x8 1000 -> 0001 */ 0x1, + /* 0x9 1001 -> 1001 */ 0x9, + /* 0xa 1010 -> 0101 */ 0x5, + /* 0xb 1011 -> 1101 */ 0xd, + /* 0xc 1100 -> 0011 */ 0x3, + /* 0xd 1101 -> 1011 */ 0xb, + /* 0xe 1110 -> 0111 */ 0x7, + /* 0xf 1111 -> 1111 */ 0xf, }; + +static uint8_t +bitreverse(uint8_t x) +{ + + return (nibbletab[x & 0xf] << 4) | nibbletab[x >> 4]; +} + +static int +s390rtc_read(device_t dev, uint8_t reg, uint8_t *buf, size_t len) +{ + struct s390rtc_softc *sc = device_get_softc(dev); + struct iic_msg msg[] = { + { + .slave = sc->sc_addr | reg, + .flags = IIC_M_RD, + .len = len, + .buf = buf, + }, + }; + int i; + int error; + + error = iicbus_transfer(dev, msg, 1); + if (error) + return (error); + + /* this chip returns each byte in reverse order */ + for (i = 0; i < len; ++i) + buf[i] = bitreverse(buf[i]); + + return (0); +} + +static int +s390rtc_write(device_t dev, uint8_t reg, uint8_t *buf, size_t len) +{ + struct s390rtc_softc *sc = device_get_softc(dev); + struct iic_msg msg[] = { + { + .slave = sc->sc_addr | reg, + .flags = IIC_M_WR, + .len = len, + .buf = buf, + }, + }; + int i; + + /* this chip expects each byte in reverse order */ + for (i = 0; i < len; ++i) + buf[i] = bitreverse(buf[i]); + + return (iicbus_transfer(dev, msg, 1)); +} + +static int +s390rtc_probe(device_t dev) +{ + + if (iicbus_get_addr(dev) != S390_ADDR) { + if (bootverbose) + device_printf(dev, "slave address mismatch. " + "(%02x != %02x)\n", iicbus_get_addr(dev), + S390_ADDR); + return (ENXIO); + } + device_set_desc(dev, "Seiko Instruments S-35390A Real-time Clock"); + + return (BUS_PROBE_SPECIFIC); +} + +static int +s390rtc_attach(device_t dev) +{ + struct s390rtc_softc *sc; + uint8_t reg; + int error; + + sc = device_get_softc(dev); + sc->sc_dev = dev; + sc->sc_addr = iicbus_get_addr(dev); + + /* Reset the chip and turn on 24h mode, after power-off or battery. */ + error = s390rtc_read(dev, S390_STATUS1, ®, 1); + if (error) { + device_printf(dev, "%s: cannot read status1 register\n", + __func__); + return (error); + } + if (reg & (S390_ST1_POC | S390_ST1_BLD)) { + reg |= S390_ST1_24H | S390_ST1_RESET; + error = s390rtc_write(dev, S390_STATUS1, ®, 1); + if (error) { + device_printf(dev, "%s: cannot initialize\n", __func__); + return (error); + } + } + + /* Disable the test mode, when enabled. */ + error = s390rtc_read(dev, S390_STATUS2, ®, 1); + if (error) { + device_printf(dev, "%s: cannot read status2 register\n", + __func__); + return (error); + } + if (reg & S390_ST2_TEST) { + reg &= ~S390_ST2_TEST; + error = s390rtc_write(dev, S390_STATUS2, ®, 1); + if (error) { + device_printf(dev, + "%s: cannot disable the test mode\n", __func__); + return (error); + } + } + + clock_register(dev, 1000000); /* 1 second resolution */ + return (0); +} + +static int +s390rtc_gettime(device_t dev, struct timespec *ts) +{ + uint8_t bcd[S390_RT1_NBYTES]; + struct clocktime ct; + struct s390rtc_softc *sc; + int error; + + sc = device_get_softc(dev); + error = s390rtc_read(dev, S390_REALTIME1, bcd, S390_RT1_NBYTES); + if (error) { + device_printf(dev, "%s: cannot read realtime1 register\n", + __func__); + return (error); + } + + /* + * Convert the register values into something useable. + */ + ct.nsec = 0; + ct.sec = FROMBCD(bcd[S390_RT1_SECOND]); + ct.min = FROMBCD(bcd[S390_RT1_MINUTE]); + ct.hour = FROMBCD(bcd[S390_RT1_HOUR] & 0x3f); + ct.day = FROMBCD(bcd[S390_RT1_DAY]); + ct.dow = bcd[S390_RT1_WDAY] & 0x07; + ct.mon = FROMBCD(bcd[S390_RT1_MONTH]); + ct.year = FROMBCD(bcd[S390_RT1_YEAR]) + 2000; + + return (clock_ct_to_ts(&ct, ts)); +} + +static int +s390rtc_settime(device_t dev, struct timespec *ts) +{ + uint8_t bcd[S390_RT1_NBYTES]; + struct clocktime ct; + struct s390rtc_softc *sc; + + sc = device_get_softc(dev); + clock_ts_to_ct(ts, &ct); + + /* + * Convert our time representation into something the S-xx390 + * can understand. + */ + bcd[S390_RT1_SECOND] = TOBCD(ct.sec); + bcd[S390_RT1_MINUTE] = TOBCD(ct.min); + bcd[S390_RT1_HOUR] = TOBCD(ct.hour); + bcd[S390_RT1_DAY] = TOBCD(ct.day); + bcd[S390_RT1_WDAY] = ct.dow; + bcd[S390_RT1_MONTH] = TOBCD(ct.mon); + bcd[S390_RT1_YEAR] = TOBCD(ct.year % 100); + + return (s390rtc_write(dev, S390_REALTIME1, bcd, S390_RT1_NBYTES)); +} + +static device_method_t s390rtc_methods[] = { + DEVMETHOD(device_probe, s390rtc_probe), + DEVMETHOD(device_attach, s390rtc_attach), + + DEVMETHOD(clock_gettime, s390rtc_gettime), + DEVMETHOD(clock_settime, s390rtc_settime), + + DEVMETHOD_END +}; + +static driver_t s390rtc_driver = { + S390_DEVNAME, + s390rtc_methods, + sizeof(struct s390rtc_softc), +}; +static devclass_t s390rtc_devclass; + +DRIVER_MODULE(s35390a, iicbus, s390rtc_driver, s390rtc_devclass, NULL, NULL); +MODULE_VERSION(s35390a, 1); +MODULE_DEPEND(s35390a, iicbus, 1, 1, 1);
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201208211731.q7LHVABd075115>