| #ifndef _RTC_H |
| #define _RTC_H |
| |
| /** @file |
| * |
| * CMOS Real-Time Clock (RTC) |
| * |
| * The CMOS/RTC registers are documented (with varying degrees of |
| * accuracy and consistency) at |
| * |
| * http://www.nondot.org/sabre/os/files/MiscHW/RealtimeClockFAQ.txt |
| * http://wiki.osdev.org/RTC |
| * http://wiki.osdev.org/CMOS |
| */ |
| |
| FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); |
| |
| #include <pic8259.h> |
| |
| /** RTC IRQ */ |
| #define RTC_IRQ 8 |
| |
| /** RTC interrupt vector */ |
| #define RTC_INT IRQ_INT ( RTC_IRQ ) |
| |
| /** CMOS/RTC address (and NMI) register */ |
| #define CMOS_ADDRESS 0x70 |
| |
| /** NMI disable bit */ |
| #define CMOS_DISABLE_NMI 0x80 |
| |
| /** CMOS/RTC data register */ |
| #define CMOS_DATA 0x71 |
| |
| /** RTC seconds */ |
| #define RTC_SEC 0x00 |
| |
| /** RTC minutes */ |
| #define RTC_MIN 0x02 |
| |
| /** RTC hours */ |
| #define RTC_HOUR 0x04 |
| |
| /** RTC weekday */ |
| #define RTC_WDAY 0x06 |
| |
| /** RTC day of month */ |
| #define RTC_MDAY 0x07 |
| |
| /** RTC month */ |
| #define RTC_MON 0x08 |
| |
| /** RTC year */ |
| #define RTC_YEAR 0x09 |
| |
| /** RTC status register A */ |
| #define RTC_STATUS_A 0x0a |
| |
| /** RTC update in progress bit */ |
| #define RTC_STATUS_A_UPDATE_IN_PROGRESS 0x80 |
| |
| /** RTC status register B */ |
| #define RTC_STATUS_B 0x0b |
| |
| /** RTC 24 hour format bit */ |
| #define RTC_STATUS_B_24_HOUR 0x02 |
| |
| /** RTC binary mode bit */ |
| #define RTC_STATUS_B_BINARY 0x04 |
| |
| /** RTC Periodic Interrupt Enabled bit */ |
| #define RTC_STATUS_B_PIE 0x40 |
| |
| /** RTC status register C */ |
| #define RTC_STATUS_C 0x0c |
| |
| /** RTC status register D */ |
| #define RTC_STATUS_D 0x0d |
| |
| /** CMOS default address */ |
| #define CMOS_DEFAULT_ADDRESS RTC_STATUS_D |
| |
| #endif /* _RTC_H */ |
