/* * Gets current TWL4030 RTC alarm time. */ static int twl4030_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) { int ret; u8 rtc_interrupts_reg = 0; /* * This returns a struct rtc_time. Reading >= 0xc0 * means "don't care" or "match all". Only the tm_hour, * tm_min, and tm_sec values are filled in. */ memset(&alm->time, 0, sizeof(struct rtc_time)); ret = get_rtc_alm_time(&alm->time); if (ret) goto out; /* Check alarm enabled flag state */ ret = ret | twl4030_i2c_read_u8(TWL4030_MODULE_RTC, &rtc_interrupts_reg, REG_RTC_INTERRUPTS_REG); if (ret) goto out; if ((rtc_interrupts_reg & BIT_RTC_INTERRUPTS_REG_IT_ALARM_M) != 0) alm->enabled = 1; else alm->enabled = 0; out: return ret; }
static int rtc_proc_output (char *buf) { #define YN(bit) ((ctrl & bit) ? "yes" : "no") #define NY(bit) ((ctrl & bit) ? "no" : "yes") char *p; struct rtc_time tm; unsigned char batt, ctrl; unsigned long freq; spin_lock_irq(&rtc_lock); batt = CMOS_READ(RTC_VALID) & RTC_VRT; ctrl = CMOS_READ(RTC_CONTROL); freq = rtc_freq; spin_unlock_irq(&rtc_lock); p = buf; get_rtc_time(&tm); /* * There is no way to tell if the luser has the RTC set for local * time or for Universal Standard Time (GMT). Probably local though. */ p += sprintf(p, "rtc_time\t: %02d:%02d:%02d\n" "rtc_date\t: %04d-%02d-%02d\n" "rtc_epoch\t: %04lu\n", tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, epoch); get_rtc_alm_time(&tm); /* * We implicitly assume 24hr mode here. Alarm values >= 0xc0 will * match any value for that particular field. Values that are * greater than a valid time, but less than 0xc0 shouldn't appear. */ p += sprintf(p, "alarm\t\t: "); if (tm.tm_hour <= 24) p += sprintf(p, "%02d:", tm.tm_hour); else p += sprintf(p, "**:"); if (tm.tm_min <= 59) p += sprintf(p, "%02d:", tm.tm_min); else p += sprintf(p, "**:"); if (tm.tm_sec <= 59) p += sprintf(p, "%02d\n", tm.tm_sec); else p += sprintf(p, "**\n"); p += sprintf(p, "DST_enable\t: %s\n" "BCD\t\t: %s\n" "24hr\t\t: %s\n" "square_wave\t: %s\n" "alarm_IRQ\t: %s\n" "update_IRQ\t: %s\n" "periodic_IRQ\t: %s\n" "periodic_freq\t: %ld\n" "batt_status\t: %s\n", YN(RTC_DST_EN), NY(RTC_DM_BINARY), YN(RTC_24H), YN(RTC_SQWE), YN(RTC_AIE), YN(RTC_UIE), YN(RTC_PIE), freq, batt ? "okay" : "dead"); return p - buf; #undef YN #undef NY }
static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { struct rtc_time wtime; #if RTC_IRQ if (rtc_has_irq == 0) { switch (cmd) { case RTC_AIE_OFF: case RTC_AIE_ON: case RTC_PIE_OFF: case RTC_PIE_ON: case RTC_UIE_OFF: case RTC_UIE_ON: case RTC_IRQP_READ: case RTC_IRQP_SET: return -EINVAL; }; } #endif switch (cmd) { #if RTC_IRQ case RTC_AIE_OFF: /* Mask alarm int. enab. bit */ { mask_rtc_irq_bit(RTC_AIE); return 0; } case RTC_AIE_ON: /* Allow alarm interrupts. */ { set_rtc_irq_bit(RTC_AIE); return 0; } case RTC_PIE_OFF: /* Mask periodic int. enab. bit */ { mask_rtc_irq_bit(RTC_PIE); if (rtc_status & RTC_TIMER_ON) { spin_lock_irq (&rtc_lock); rtc_status &= ~RTC_TIMER_ON; del_timer(&rtc_irq_timer); spin_unlock_irq (&rtc_lock); } return 0; } case RTC_PIE_ON: /* Allow periodic ints */ { /* * We don't really want Joe User enabling more * than 64Hz of interrupts on a multi-user machine. */ if ((rtc_freq > rtc_max_user_freq) && (!capable(CAP_SYS_RESOURCE))) return -EACCES; if (!(rtc_status & RTC_TIMER_ON)) { spin_lock_irq (&rtc_lock); rtc_irq_timer.expires = jiffies + HZ/rtc_freq + 2*HZ/100; add_timer(&rtc_irq_timer); rtc_status |= RTC_TIMER_ON; spin_unlock_irq (&rtc_lock); } set_rtc_irq_bit(RTC_PIE); return 0; } case RTC_UIE_OFF: /* Mask ints from RTC updates. */ { mask_rtc_irq_bit(RTC_UIE); return 0; } case RTC_UIE_ON: /* Allow ints for RTC updates. */ { set_rtc_irq_bit(RTC_UIE); return 0; } #endif case RTC_ALM_READ: /* Read the present alarm time */ { /* * This returns a struct rtc_time. Reading >= 0xc0 * means "don't care" or "match all". Only the tm_hour, * tm_min, and tm_sec values are filled in. */ memset(&wtime, 0, sizeof(struct rtc_time)); get_rtc_alm_time(&wtime); break; } case RTC_ALM_SET: /* Store a time into the alarm */ { /* * This expects a struct rtc_time. Writing 0xff means * "don't care" or "match all". Only the tm_hour, * tm_min and tm_sec are used. */ unsigned char hrs, min, sec; struct rtc_time alm_tm; if (copy_from_user(&alm_tm, (struct rtc_time*)arg, sizeof(struct rtc_time))) return -EFAULT; hrs = alm_tm.tm_hour; min = alm_tm.tm_min; sec = alm_tm.tm_sec; spin_lock_irq(&rtc_lock); if (!(CMOS_READ(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) { if (sec < 60) BIN_TO_BCD(sec); else sec = 0xff; if (min < 60) BIN_TO_BCD(min); else min = 0xff; if (hrs < 24) BIN_TO_BCD(hrs); else hrs = 0xff; } CMOS_WRITE(hrs, RTC_HOURS_ALARM); CMOS_WRITE(min, RTC_MINUTES_ALARM); CMOS_WRITE(sec, RTC_SECONDS_ALARM); spin_unlock_irq(&rtc_lock); return 0; } case RTC_RD_TIME: /* Read the time/date from RTC */ { memset(&wtime, 0, sizeof(struct rtc_time)); get_rtc_time(&wtime); break; } case RTC_SET_TIME: /* Set the RTC */ { struct rtc_time rtc_tm; unsigned char mon, day, hrs, min, sec, leap_yr; unsigned char save_control, save_freq_select; unsigned int yrs; #ifdef CONFIG_DECSTATION unsigned int real_yrs; #endif if (!capable(CAP_SYS_TIME)) return -EACCES; if (copy_from_user(&rtc_tm, (struct rtc_time*)arg, sizeof(struct rtc_time))) return -EFAULT; yrs = rtc_tm.tm_year + 1900; mon = rtc_tm.tm_mon + 1; /* tm_mon starts at zero */ day = rtc_tm.tm_mday; hrs = rtc_tm.tm_hour; min = rtc_tm.tm_min; sec = rtc_tm.tm_sec; if (yrs < 1970) return -EINVAL; leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400)); if ((mon > 12) || (day == 0)) return -EINVAL; if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr))) return -EINVAL; if ((hrs >= 24) || (min >= 60) || (sec >= 60)) return -EINVAL; if ((yrs -= epoch) > 255) /* They are unsigned */ return -EINVAL; spin_lock_irq(&rtc_lock); #ifdef CONFIG_DECSTATION real_yrs = yrs; yrs = 72; /* * We want to keep the year set to 73 until March * for non-leap years, so that Feb, 29th is handled * correctly. */ if (!leap_yr && mon < 3) { real_yrs--; yrs = 73; } #endif /* These limits and adjustments are independant of * whether the chip is in binary mode or not. */ if (yrs > 169) { spin_unlock_irq(&rtc_lock); return -EINVAL; } if (yrs >= 100) yrs -= 100; if (!(CMOS_READ(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) { BIN_TO_BCD(sec); BIN_TO_BCD(min); BIN_TO_BCD(hrs); BIN_TO_BCD(day); BIN_TO_BCD(mon); BIN_TO_BCD(yrs); } save_control = CMOS_READ(RTC_CONTROL); CMOS_WRITE((save_control|RTC_SET), RTC_CONTROL); save_freq_select = CMOS_READ(RTC_FREQ_SELECT); CMOS_WRITE((save_freq_select|RTC_DIV_RESET2), RTC_FREQ_SELECT); #ifdef CONFIG_DECSTATION CMOS_WRITE(real_yrs, RTC_DEC_YEAR); #endif CMOS_WRITE(yrs, RTC_YEAR); CMOS_WRITE(mon, RTC_MONTH); CMOS_WRITE(day, RTC_DAY_OF_MONTH); CMOS_WRITE(hrs, RTC_HOURS); CMOS_WRITE(min, RTC_MINUTES); CMOS_WRITE(sec, RTC_SECONDS); CMOS_WRITE(save_control, RTC_CONTROL); CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT); spin_unlock_irq(&rtc_lock); return 0; } #if RTC_IRQ case RTC_IRQP_READ: /* Read the periodic IRQ rate. */ { return put_user(rtc_freq, (unsigned long *)arg); } case RTC_IRQP_SET: /* Set periodic IRQ rate. */ { int tmp = 0; unsigned char val; /* * The max we can do is 8192Hz. */ if ((arg < 2) || (arg > 8192)) return -EINVAL; /* * We don't really want Joe User generating more * than 64Hz of interrupts on a multi-user machine. */ if ((arg > rtc_max_user_freq) && (!capable(CAP_SYS_RESOURCE))) return -EACCES; while (arg > (1<<tmp)) tmp++; /* * Check that the input was really a power of 2. */ if (arg != (1<<tmp)) return -EINVAL; spin_lock_irq(&rtc_lock); rtc_freq = arg; val = CMOS_READ(RTC_FREQ_SELECT) & 0xf0; val |= (16 - tmp); CMOS_WRITE(val, RTC_FREQ_SELECT); spin_unlock_irq(&rtc_lock); return 0; } #endif case RTC_EPOCH_READ: /* Read the epoch. */ { return put_user (epoch, (unsigned long *)arg); } case RTC_EPOCH_SET: /* Set the epoch. */ { /* * There were no RTC clocks before 1900. */ if (arg < 1900) return -EINVAL; if (!capable(CAP_SYS_TIME)) return -EACCES; epoch = arg; return 0; } default: return -EINVAL; } return copy_to_user((void *)arg, &wtime, sizeof wtime) ? -EFAULT : 0; }