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Diffstat (limited to 'include/libchip/mc146818a.h')
-rw-r--r-- | include/libchip/mc146818a.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/include/libchip/mc146818a.h b/include/libchip/mc146818a.h new file mode 100644 index 0000000000..4eb5af04d7 --- /dev/null +++ b/include/libchip/mc146818a.h @@ -0,0 +1,68 @@ +/* + * This file contains the definitions for the following real-time clocks: + * + * + Motorola MC146818A + * + * COPYRIGHT (c) 1989-1999. + * On-Line Applications Research Corporation (OAR). + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + */ + +#ifndef __LIBCHIP_MC146818A_h +#define __LIBCHIP_MC146818A_h + +/* + * Register addresses within chip + */ +#define MC146818A_SEC 0x00 /* seconds */ +#define MC146818A_SECALRM 0x01 /* seconds alarm */ +#define MC146818A_MIN 0x02 /* minutes */ +#define MC146818A_MINALRM 0x03 /* minutes alarm */ +#define MC146818A_HRS 0x04 /* hours */ +#define MC146818A_HRSALRM 0x05 /* hours alarm */ +#define MC146818A_WDAY 0x06 /* week day */ +#define MC146818A_DAY 0x07 /* day of month */ +#define MC146818A_MONTH 0x08 /* month of year */ +#define MC146818A_YEAR 0x09 /* month of year */ + +#define MC146818A_STATUSA 0x0a /* status register A */ +#define MC146818ASA_TUP 0x80 /* time update in progress */ +#define MC146818ASA_DIVIDER 0x20 /* divider for 32768 crystal */ +#define MC146818ASA_1024 0x06 /* divide to 1024 Hz */ + +#define MC146818A_STATUSB 0x0b /* status register B */ +#define MC146818ASB_DST 0x01 /* Daylight Savings Time */ +#define MC146818ASB_24HR 0x02 /* 0 = 12 hours, 1 = 24 hours */ +#define MC146818ASB_HALT 0x80 /* stop clock updates */ + +#define MC146818A_STATUSD 0x0d /* status register D */ +#define MC146818ASD_PWR 0x80 /* clock lost power */ + + +/* + * Driver function table + */ +extern rtc_fns mc146818a_fns; +bool mc146818a_probe( + int minor +); + +/* + * Default register access routines + */ +uint32_t mc146818a_get_register( + uintptr_t ulCtrlPort, + uint8_t ucRegNum +); + +void mc146818a_set_register( + uintptr_t ulCtrlPort, + uint8_t ucRegNum, + uint32_t ucData +); + +#endif +/* end of include file */ |