diff options
Diffstat (limited to 'sys/dev/ic')
| -rw-r--r-- | sys/dev/ic/m41t8xreg.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/sys/dev/ic/m41t8xreg.h b/sys/dev/ic/m41t8xreg.h new file mode 100644 index 00000000000..61828c16705 --- /dev/null +++ b/sys/dev/ic/m41t8xreg.h @@ -0,0 +1,98 @@ +/* $OpenBSD: m41t8xreg.h,v 1.1 2010/02/19 00:21:47 miod Exp $ */ + +/* + * Copyright (c) 2010 Miodrag Vallat. + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* + * ST M41T8x serial access real time clock registers + */ + +/* + * Note that register update will stop while accessing registers 0x00 to 0x07 + * (without the clock stopping), so that the reader does not get false data. + * Registers will be thawed after reading register 0x07, when the + * autoincrementing read address reaches 0x08. + * + * Clock and alarm numerical values are stored in BCD. All other values are + * stored in binary. + */ + +#define M41T8X_HSEC 0x00 /* 1/100th of second */ +#define M41T8X_SEC 0x01 /* second */ +#define M41T8X_STOP 0x80 /* stop clock, bit 7 of above */ +#define M41T8X_MIN 0x02 /* minute */ +#define M41T8X_HR 0x03 /* hour */ +#define M41T8X_CEB 0x80 /* century bit toggle enable */ +#define M41T8X_CB 0x40 /* century bit */ +#define M41T8X_DOW 0x04 /* day of week */ +#define M41T8X_DAY 0x05 /* day of month */ +#define M41T8X_MON 0x06 /* month */ +#define M41T8X_YEAR 0x07 /* year */ + +#define M41T8X_TOD_START 0x00 +#define M41T8X_TOD_LENGTH 0x08 + +#define M41T8X_CTRL 0x08 /* control */ +#define M41T8X_OUT 0x80 /* output level */ +#define M41T8X_32KHZ 0x09 /* 32KHz oscillator control */ +#define M41T8X_32KE 0x80 /* 32KHz enable */ + +#define M41T8X_ALMON 0x0a /* alarm month */ +#define M41T8X_AFE 0x80 /* alarm flag enable */ +#define M41T8X_SQWE 0x40 /* square wave enable */ +#define M41T8X_ALDAY 0x0b /* alarm day */ +#define M41T8X_RPT4 0x80 /* alarm repeat mode bits */ +#define M41T8X_RPT5 0x40 +#define M41T8X_ALHOUR 0x0c /* alarm hour */ +#define M41T8X_RPT3 0x80 +#define M41T8X_ALMIN 0x0d /* alarm minute */ +#define M41T8X_RPT2 0x80 +#define M41T8X_ALSEC 0x0e /* alarm second */ +#define M41T8X_RPT1 0x80 + +#define M41T8X_FLAGS 0x0f /* flags */ +#define M41T8X_AF 0x40 /* alarm flag */ + +#define M41T8X_SQW 0x13 /* square wave control */ +#define M41T8X_RS3 0x80 /* square wave frequency */ +#define M41T8X_RS2 0x40 +#define M41T8X_RS1 0x20 +#define M41T8X_RS0 0x10 + +/* alarm repeat settings, RPT5..RPT1 */ +#define M41T8X_ALREP_SEC 0x1f /* once per second */ +#define M41T8X_ALREP_MIN 0x1e /* once per minute */ +#define M41T8X_ALREP_HOUR 0x1c /* once per hour */ +#define M41T8X_ALREP_DAY 0x18 /* once per day */ +#define M41T8X_ALREP_MON 0x10 /* once per month */ +#define M41T8X_ALREP_YEAR 0x00 /* once per year */ + +/* square wave frequency, RS3..RS0 */ +#define M41T8X_SQW_32K 0x01 +#define M41T8X_SQW_8K 0x02 +#define M41T8X_SQW_4K 0x03 +#define M41T8X_SQW_2K 0x04 +#define M41T8X_SQW_1K 0x05 +#define M41T8X_SQW_512 0x06 +#define M41T8X_SQW_256 0x07 +#define M41T8X_SQW_128 0x08 +#define M41T8X_SQW_64 0x09 +#define M41T8X_SQW_32 0x0a +#define M41T8X_SQW_16 0x0b +#define M41T8X_SQW_8 0x0c +#define M41T8X_SQW_4 0x0d +#define M41T8X_SQW_2 0x0e +#define M41T8X_SQW_1 0x0f |