static int
acpi_system_write_alarm (
struct file *file,
const char *buffer,
unsigned long count,
void *data)
{
int result = 0;
char alarm_string[30] = {'\0'};
char *p = alarm_string;
u32 sec, min, hr, day, mo, yr;
int adjust = 0;
unsigned char rtc_control = 0;
ACPI_FUNCTION_TRACE("acpi_system_write_alarm");
if (count > sizeof(alarm_string) - 1)
return_VALUE(-EINVAL);
if (copy_from_user(alarm_string, buffer, count))
return_VALUE(-EFAULT);
alarm_string[count] = '\0';
/* check for time adjustment */
if (alarm_string[0] == '+') {
p++;
adjust = 1;
}
if ((result = get_date_field(&p, &yr)))
goto end;
if ((result = get_date_field(&p, &mo)))
goto end;
if ((result = get_date_field(&p, &day)))
goto end;
if ((result = get_date_field(&p, &hr)))
goto end;
if ((result = get_date_field(&p, &min)))
goto end;
if ((result = get_date_field(&p, &sec)))
goto end;
if (sec > 59) {
min += 1;
sec -= 60;
}
if (min > 59) {
hr += 1;
min -= 60;
}
if (hr > 23) {
day += 1;
hr -= 24;
}
if (day > 31) {
mo += 1;
day -= 31;
}
if (mo > 12) {
yr += 1;
mo -= 12;
}
spin_lock_irq(&rtc_lock);
rtc_control = CMOS_READ(RTC_CONTROL);
if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
BIN_TO_BCD(yr);
BIN_TO_BCD(mo);
BIN_TO_BCD(day);
BIN_TO_BCD(hr);
BIN_TO_BCD(min);
BIN_TO_BCD(sec);
}
if (adjust) {
yr += CMOS_READ(RTC_YEAR);
mo += CMOS_READ(RTC_MONTH);
day += CMOS_READ(RTC_DAY_OF_MONTH);
hr += CMOS_READ(RTC_HOURS);
min += CMOS_READ(RTC_MINUTES);
sec += CMOS_READ(RTC_SECONDS);
}
spin_unlock_irq(&rtc_lock);
if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
BCD_TO_BIN(yr);
BCD_TO_BIN(mo);
BCD_TO_BIN(day);
BCD_TO_BIN(hr);
BCD_TO_BIN(min);
BCD_TO_BIN(sec);
}
if (sec > 59) {
min++;
sec -= 60;
}
if (min > 59) {
hr++;
min -= 60;
}
if (hr > 23) {
day++;
hr -= 24;
}
if (day > 31) {
mo++;
day -= 31;
}
if (mo > 12) {
yr++;
mo -= 12;
}
if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
BIN_TO_BCD(yr);
BIN_TO_BCD(mo);
BIN_TO_BCD(day);
BIN_TO_BCD(hr);
BIN_TO_BCD(min);
BIN_TO_BCD(sec);
}
spin_lock_irq(&rtc_lock);
/* write the fields the rtc knows about */
CMOS_WRITE(hr, RTC_HOURS_ALARM);
CMOS_WRITE(min, RTC_MINUTES_ALARM);
CMOS_WRITE(sec, RTC_SECONDS_ALARM);
/*
* If the system supports an enhanced alarm it will have non-zero
* offsets into the CMOS RAM here -- which for some reason are pointing
* to the RTC area of memory.
*/
#if 0
if (acpi_gbl_FADT->day_alrm)
CMOS_WRITE(day, acpi_gbl_FADT->day_alrm);
if (acpi_gbl_FADT->mon_alrm)
CMOS_WRITE(mo, acpi_gbl_FADT->mon_alrm);
if (acpi_gbl_FADT->century)
CMOS_WRITE(yr/100, acpi_gbl_FADT->century);
#endif
/* enable the rtc alarm interrupt */
if (!(rtc_control & RTC_AIE)) {
rtc_control |= RTC_AIE;
CMOS_WRITE(rtc_control,RTC_CONTROL);
CMOS_READ(RTC_INTR_FLAGS);
}
spin_unlock_irq(&rtc_lock);
acpi_set_register(ACPI_BITREG_RT_CLOCK_ENABLE, 1, ACPI_MTX_LOCK);
file->f_pos += count;
result = 0;
end:
return_VALUE(result ? result : count);
}
int sm_osl_proc_write_alarm (
struct file *file,
const char *buffer,
unsigned long count,
void *data)
{
char buf[30];
char *str = buf;
u32 sec,min,hr;
u32 day,mo,yr;
int adjust = 0;
unsigned char rtc_control;
int error = -EINVAL;
if (count > sizeof(buf) - 1) return -EINVAL;
if (copy_from_user(str,buffer,count)) return -EFAULT;
str[count] = '\0';
/* check for time adjustment */
if (str[0] == '+') {
str++;
adjust = 1;
}
if ((error = get_date_field(&str,&yr))) goto out;
if ((error = get_date_field(&str,&mo))) goto out;
if ((error = get_date_field(&str,&day))) goto out;
if ((error = get_date_field(&str,&hr))) goto out;
if ((error = get_date_field(&str,&min))) goto out;
if ((error = get_date_field(&str,&sec))) goto out;
if (sec > 59) {
min += 1;
sec -= 60;
}
if (min > 59) {
hr += 1;
min -= 60;
}
if (hr > 23) {
day += 1;
hr -= 24;
}
if (day > 31) {
mo += 1;
day -= 31;
}
if (mo > 12) {
yr += 1;
mo -= 12;
}
spin_lock_irq(&rtc_lock);
rtc_control = CMOS_READ(RTC_CONTROL);
if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
BIN_TO_BCD(yr);
BIN_TO_BCD(mo);
BIN_TO_BCD(day);
BIN_TO_BCD(hr);
BIN_TO_BCD(min);
BIN_TO_BCD(sec);
}
if (adjust) {
yr += CMOS_READ(RTC_YEAR);
mo += CMOS_READ(RTC_MONTH);
day += CMOS_READ(RTC_DAY_OF_MONTH);
hr += CMOS_READ(RTC_HOURS);
min += CMOS_READ(RTC_MINUTES);
sec += CMOS_READ(RTC_SECONDS);
}
spin_unlock_irq(&rtc_lock);
if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
BCD_TO_BIN(yr);
BCD_TO_BIN(mo);
BCD_TO_BIN(day);
BCD_TO_BIN(hr);
BCD_TO_BIN(min);
BCD_TO_BIN(sec);
}
if (sec > 59) {
min++;
sec -= 60;
}
if (min > 59) {
hr++;
min -= 60;
}
if (hr > 23) {
day++;
hr -= 24;
}
if (day > 31) {
mo++;
day -= 31;
}
if (mo > 12) {
yr++;
mo -= 12;
}
if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
BIN_TO_BCD(yr);
BIN_TO_BCD(mo);
BIN_TO_BCD(day);
BIN_TO_BCD(hr);
BIN_TO_BCD(min);
BIN_TO_BCD(sec);
}
spin_lock_irq(&rtc_lock);
/* write the fields the rtc knows about */
CMOS_WRITE(hr,RTC_HOURS_ALARM);
CMOS_WRITE(min,RTC_MINUTES_ALARM);
CMOS_WRITE(sec,RTC_SECONDS_ALARM);
/* If the system supports an enhanced alarm, it will have non-zero
* offsets into the CMOS RAM here.
* Which for some reason are pointing to the RTC area of memory.
*/
#if 0
if (acpi_gbl_FADT->day_alrm) CMOS_WRITE(day,acpi_gbl_FADT->day_alrm);
if (acpi_gbl_FADT->mon_alrm) CMOS_WRITE(mo,acpi_gbl_FADT->mon_alrm);
if (acpi_gbl_FADT->century) CMOS_WRITE(yr / 100,acpi_gbl_FADT->century);
#endif
/* enable the rtc alarm interrupt */
if (!(rtc_control & RTC_AIE)) {
rtc_control |= RTC_AIE;
CMOS_WRITE(rtc_control,RTC_CONTROL);
CMOS_READ(RTC_INTR_FLAGS);
}
/* unlock the lock on the rtc now that we're done with it */
spin_unlock_irq(&rtc_lock);
acpi_hw_register_bit_access(ACPI_WRITE,ACPI_MTX_LOCK, RTC_EN, 1);
file->f_pos += count;
error = 0;
out:
return error ? error : count;
}
