Release 4.7 include/linux/mc146818rtc.h
/* mc146818rtc.h - register definitions for the Real-Time-Clock / CMOS RAM
* Copyright Torsten Duwe <duwe@informatik.uni-erlangen.de> 1993
* derived from Data Sheet, Copyright Motorola 1984 (!).
* It was written to be part of the Linux operating system.
*/
/* permission is hereby granted to copy, modify and redistribute this code
* in terms of the GNU Library General Public License, Version 2 or later,
* at your option.
*/
#ifndef _MC146818RTC_H
#define _MC146818RTC_H
#include <asm/io.h>
#include <linux/rtc.h> /* get the user-level API */
#include <asm/mc146818rtc.h> /* register access macros */
#ifdef __KERNEL__
#include <linux/spinlock.h> /* spinlock_t */
extern spinlock_t rtc_lock; /* serialize CMOS RAM access */
/* Some RTCs extend the mc146818 register set to support alarms of more
* than 24 hours in the future; or dates that include a century code.
* This platform_data structure can pass this information to the driver.
*
* Also, some platforms need suspend()/resume() hooks to kick in special
* handling of wake alarms, e.g. activating ACPI BIOS hooks or setting up
* a separate wakeup alarm used by some almost-clone chips.
*/
struct cmos_rtc_board_info {
void (*wake_on)(struct device *dev);
void (*wake_off)(struct device *dev);
u32 flags;
#define CMOS_RTC_FLAGS_NOFREQ (1 << 0)
int address_space;
u8 rtc_day_alarm; /* zero, or register index */
u8 rtc_mon_alarm; /* zero, or register index */
u8 rtc_century; /* zero, or register index */
};
#endif
/**********************************************************************
* register summary
**********************************************************************/
#define RTC_SECONDS 0
#define RTC_SECONDS_ALARM 1
#define RTC_MINUTES 2
#define RTC_MINUTES_ALARM 3
#define RTC_HOURS 4
#define RTC_HOURS_ALARM 5
/* RTC_*_alarm is always true if 2 MSBs are set */
# define RTC_ALARM_DONT_CARE 0xC0
#define RTC_DAY_OF_WEEK 6
#define RTC_DAY_OF_MONTH 7
#define RTC_MONTH 8
#define RTC_YEAR 9
/* control registers - Moto names
*/
#define RTC_REG_A 10
#define RTC_REG_B 11
#define RTC_REG_C 12
#define RTC_REG_D 13
/**********************************************************************
* register details
**********************************************************************/
#define RTC_FREQ_SELECT RTC_REG_A
/* update-in-progress - set to "1" 244 microsecs before RTC goes off the bus,
* reset after update (may take 1.984ms @ 32768Hz RefClock) is complete,
* totalling to a max high interval of 2.228 ms.
*/
# define RTC_UIP 0x80
# define RTC_DIV_CTL 0x70
/* divider control: refclock values 4.194 / 1.049 MHz / 32.768 kHz */
# define RTC_REF_CLCK_4MHZ 0x00
# define RTC_REF_CLCK_1MHZ 0x10
# define RTC_REF_CLCK_32KHZ 0x20
/* 2 values for divider stage reset, others for "testing purposes only" */
# define RTC_DIV_RESET1 0x60
# define RTC_DIV_RESET2 0x70
/* Periodic intr. / Square wave rate select. 0=none, 1=32.8kHz,... 15=2Hz */
# define RTC_RATE_SELECT 0x0F
/**********************************************************************/
#define RTC_CONTROL RTC_REG_B
# define RTC_SET 0x80
/* disable updates for clock setting */
# define RTC_PIE 0x40
/* periodic interrupt enable */
# define RTC_AIE 0x20
/* alarm interrupt enable */
# define RTC_UIE 0x10
/* update-finished interrupt enable */
# define RTC_SQWE 0x08
/* enable square-wave output */
# define RTC_DM_BINARY 0x04
/* all time/date values are BCD if clear */
# define RTC_24H 0x02
/* 24 hour mode - else hours bit 7 means pm */
# define RTC_DST_EN 0x01
/* auto switch DST - works f. USA only */
/**********************************************************************/
#define RTC_INTR_FLAGS RTC_REG_C
/* caution - cleared by read */
# define RTC_IRQF 0x80
/* any of the following 3 is active */
# define RTC_PF 0x40
# define RTC_AF 0x20
# define RTC_UF 0x10
/**********************************************************************/
#define RTC_VALID RTC_REG_D
# define RTC_VRT 0x80
/* valid RAM and time */
/**********************************************************************/
#ifndef ARCH_RTC_LOCATION /* Override by <asm/mc146818rtc.h>? */
#define RTC_IO_EXTENT 0x8
#define RTC_IO_EXTENT_USED 0x2
#define RTC_IOMAPPED 1
/* Default to I/O mapping. */
#else
#define RTC_IO_EXTENT_USED RTC_IO_EXTENT
#endif /* ARCH_RTC_LOCATION */
#endif /* _MC146818RTC_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 208 | 70.03% | 4 | 36.36% |
| david brownell | david brownell | 42 | 14.14% | 2 | 18.18% |
| maciej w. rozycki | maciej w. rozycki | 26 | 8.75% | 2 | 18.18% |
| bjorn helgaas | bjorn helgaas | 10 | 3.37% | 1 | 9.09% |
| michael obster | michael obster | 9 | 3.03% | 1 | 9.09% |
| linus torvalds | linus torvalds | 2 | 0.67% | 1 | 9.09% |
| Total | 297 | 100.00% | 11 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.