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#ifndef PC80_MC146818RTC_H
#define PC80_MC146818RTC_H
#ifndef RTC_BASE_PORT
#define RTC_BASE_PORT 0x70
#endif
#define RTC_PORT(x) (RTC_BASE_PORT + (x))
/* 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_RATE_NONE 0x00
# define RTC_RATE_32786HZ 0x01
# define RTC_RATE_16384HZ 0x02
# define RTC_RATE_8192HZ 0x03
# define RTC_RATE_4096HZ 0x04
# define RTC_RATE_2048HZ 0x05
# define RTC_RATE_1024HZ 0x06
# define RTC_RATE_512HZ 0x07
# define RTC_RATE_256HZ 0x08
# define RTC_RATE_128HZ 0x09
# define RTC_RATE_64HZ 0x0a
# define RTC_RATE_32HZ 0x0b
# define RTC_RATE_16HZ 0x0c
# define RTC_RATE_8HZ 0x0d
# define RTC_RATE_4HZ 0x0e
# define RTC_RATE_2HZ 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 */
/**********************************************************************/
/* On PCs, the checksum is built only over bytes 16..45 */
#define PC_CKS_RANGE_START 16
#define PC_CKS_RANGE_END 45
#define PC_CKS_LOC 46
#ifndef UTIL_BUILD_OPTION_TABLE
#include <arch/io.h>
static inline unsigned char cmos_read(unsigned char addr)
{
int offs = 0;
if (addr >= 128) {
offs = 2;
addr -= 128;
}
outb(addr, RTC_BASE_PORT + offs + 0);
return inb(RTC_BASE_PORT + offs + 1);
}
static inline void cmos_write(unsigned char val, unsigned char addr)
{
int offs = 0;
if (addr >= 128) {
offs = 2;
addr -= 128;
}
outb(addr, RTC_BASE_PORT + offs + 0);
outb(val, RTC_BASE_PORT + offs + 1);
}
#endif
#if !defined(__ROMCC__)
void rtc_init(int invalid);
#if CONFIG_USE_OPTION_TABLE
int set_option(const char *name, void *val);
int get_option(void *dest, const char *name);
unsigned read_option_lowlevel(unsigned start, unsigned size, unsigned def);
#else
static inline int set_option(const char *name __attribute__((unused)), void *val __attribute__((unused))) { return -2; };
static inline int get_option(void *dest __attribute__((unused)),
const char *name __attribute__((unused))) { return -2; }
static inline unsigned read_option_lowlevel(unsigned start, unsigned size, unsigned def)
{ return def; }
#endif
#else
#include <pc80/mc146818rtc_early.c>
#endif
#define read_option(name, default) read_option_lowlevel(CMOS_VSTART_ ##name, CMOS_VLEN_ ##name, (default))
#endif /* PC80_MC146818RTC_H */
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