mc146818rtc.h 632 B

123456789101112131415161718192021222324252627282930
  1. /*
  2. * Machine dependent access functions for RTC registers.
  3. */
  4. #ifndef _ASM_MC146818RTC_H
  5. #define _ASM_MC146818RTC_H
  6. #include <asm/io.h>
  7. #ifndef RTC_PORT
  8. #define RTC_PORT(x) ((x))
  9. #define RTC_ALWAYS_BCD 1 /* RTC operates in binary mode */
  10. #endif
  11. /*
  12. * The yet supported machines all access the RTC index register via
  13. * an ISA port access but the way to access the date register differs ...
  14. */
  15. #define CMOS_READ(addr) ({ \
  16. outb_p((addr),RTC_PORT(0)); \
  17. inb_p(RTC_PORT(1)); \
  18. })
  19. #define CMOS_WRITE(val, addr) ({ \
  20. outb_p((addr),RTC_PORT(0)); \
  21. outb_p((val),RTC_PORT(1)); \
  22. })
  23. #define RTC_IRQ 8
  24. #endif /* _ASM_MC146818RTC_H */