^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * rtc-mrst.c: Driver for Moorestown virtual RTC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * (C) Copyright 2009 Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author: Jacob Pan (jacob.jun.pan@intel.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Feng Tang (feng.tang@intel.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Note:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * VRTC is emulated by system controller firmware, the real HW
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * RTC is located in the PMIC device. SCU FW shadows PMIC RTC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * in a memory mapped IO space that is visible to the host IA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * processor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * This driver is based upon drivers/rtc/rtc-cmos.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * Note:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * * vRTC only supports binary mode and 24H mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * * vRTC only support PIE and AIE, no UIE, and its PIE only happens
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * at 23:59:59pm everyday, no support for adjustable frequency
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * * Alarm function is also limited to hr/min/sec.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/mod_devicetable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/mc146818rtc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/sfi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <asm/intel_scu_ipc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <asm/intel-mid.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <asm/intel_mid_vrtc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct mrst_rtc {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct rtc_device *rtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) u8 enabled_wake;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) u8 suspend_ctrl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static const char driver_name[] = "rtc_mrst";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define RTC_IRQMASK (RTC_PF | RTC_AF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static inline int is_intr(u8 rtc_intr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (!(rtc_intr & RTC_IRQF))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return rtc_intr & RTC_IRQMASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static inline unsigned char vrtc_is_updating(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) unsigned char uip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) spin_lock_irqsave(&rtc_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) uip = (vrtc_cmos_read(RTC_FREQ_SELECT) & RTC_UIP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) spin_unlock_irqrestore(&rtc_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) return uip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * rtc_time's year contains the increment over 1900, but vRTC's YEAR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * register can't be programmed to value larger than 0x64, so vRTC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * driver chose to use 1972 (1970 is UNIX time start point) as the base,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * and does the translation at read/write time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * Why not just use 1970 as the offset? it's because using 1972 will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * make it consistent in leap year setting for both vrtc and low-level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * physical rtc devices. Then why not use 1960 as the offset? If we use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * 1960, for a device's first use, its YEAR register is 0 and the system
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) * year will be parsed as 1960 which is not a valid UNIX time and will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * cause many applications to fail mysteriously.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static int mrst_read_time(struct device *dev, struct rtc_time *time)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) if (vrtc_is_updating())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) msleep(20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) spin_lock_irqsave(&rtc_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) time->tm_sec = vrtc_cmos_read(RTC_SECONDS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) time->tm_min = vrtc_cmos_read(RTC_MINUTES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) time->tm_hour = vrtc_cmos_read(RTC_HOURS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) time->tm_mday = vrtc_cmos_read(RTC_DAY_OF_MONTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) time->tm_mon = vrtc_cmos_read(RTC_MONTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) time->tm_year = vrtc_cmos_read(RTC_YEAR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) spin_unlock_irqrestore(&rtc_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) /* Adjust for the 1972/1900 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) time->tm_year += 72;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) time->tm_mon--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static int mrst_set_time(struct device *dev, struct rtc_time *time)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) unsigned char mon, day, hrs, min, sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) unsigned int yrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) yrs = time->tm_year;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) mon = time->tm_mon + 1; /* tm_mon starts at zero */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) day = time->tm_mday;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) hrs = time->tm_hour;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) min = time->tm_min;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) sec = time->tm_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (yrs < 72 || yrs > 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) yrs -= 72;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) spin_lock_irqsave(&rtc_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) vrtc_cmos_write(yrs, RTC_YEAR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) vrtc_cmos_write(mon, RTC_MONTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) vrtc_cmos_write(day, RTC_DAY_OF_MONTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) vrtc_cmos_write(hrs, RTC_HOURS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) vrtc_cmos_write(min, RTC_MINUTES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) vrtc_cmos_write(sec, RTC_SECONDS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) spin_unlock_irqrestore(&rtc_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) ret = intel_scu_ipc_simple_command(IPCMSG_VRTC, IPC_CMD_VRTC_SETTIME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static int mrst_read_alarm(struct device *dev, struct rtc_wkalrm *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) struct mrst_rtc *mrst = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) unsigned char rtc_control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (mrst->irq <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) /* vRTC only supports binary mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) spin_lock_irq(&rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) t->time.tm_sec = vrtc_cmos_read(RTC_SECONDS_ALARM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) t->time.tm_min = vrtc_cmos_read(RTC_MINUTES_ALARM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) t->time.tm_hour = vrtc_cmos_read(RTC_HOURS_ALARM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) rtc_control = vrtc_cmos_read(RTC_CONTROL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) spin_unlock_irq(&rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) t->enabled = !!(rtc_control & RTC_AIE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) t->pending = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static void mrst_checkintr(struct mrst_rtc *mrst, unsigned char rtc_control)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) unsigned char rtc_intr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) * NOTE after changing RTC_xIE bits we always read INTR_FLAGS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) * allegedly some older rtcs need that to handle irqs properly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) rtc_intr = vrtc_cmos_read(RTC_INTR_FLAGS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) rtc_intr &= (rtc_control & RTC_IRQMASK) | RTC_IRQF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (is_intr(rtc_intr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) rtc_update_irq(mrst->rtc, 1, rtc_intr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static void mrst_irq_enable(struct mrst_rtc *mrst, unsigned char mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) unsigned char rtc_control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) * Flush any pending IRQ status, notably for update irqs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) * before we enable new IRQs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) rtc_control = vrtc_cmos_read(RTC_CONTROL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) mrst_checkintr(mrst, rtc_control);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) rtc_control |= mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) vrtc_cmos_write(rtc_control, RTC_CONTROL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) mrst_checkintr(mrst, rtc_control);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static void mrst_irq_disable(struct mrst_rtc *mrst, unsigned char mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) unsigned char rtc_control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) rtc_control = vrtc_cmos_read(RTC_CONTROL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) rtc_control &= ~mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) vrtc_cmos_write(rtc_control, RTC_CONTROL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) mrst_checkintr(mrst, rtc_control);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) static int mrst_set_alarm(struct device *dev, struct rtc_wkalrm *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) struct mrst_rtc *mrst = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) unsigned char hrs, min, sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) if (!mrst->irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) hrs = t->time.tm_hour;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) min = t->time.tm_min;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) sec = t->time.tm_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) spin_lock_irq(&rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) /* Next rtc irq must not be from previous alarm setting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) mrst_irq_disable(mrst, RTC_AIE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) /* Update alarm */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) vrtc_cmos_write(hrs, RTC_HOURS_ALARM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) vrtc_cmos_write(min, RTC_MINUTES_ALARM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) vrtc_cmos_write(sec, RTC_SECONDS_ALARM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) spin_unlock_irq(&rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) ret = intel_scu_ipc_simple_command(IPCMSG_VRTC, IPC_CMD_VRTC_SETALARM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) spin_lock_irq(&rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (t->enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) mrst_irq_enable(mrst, RTC_AIE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) spin_unlock_irq(&rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) /* Currently, the vRTC doesn't support UIE ON/OFF */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) static int mrst_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct mrst_rtc *mrst = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) spin_lock_irqsave(&rtc_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) if (enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) mrst_irq_enable(mrst, RTC_AIE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) mrst_irq_disable(mrst, RTC_AIE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) spin_unlock_irqrestore(&rtc_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) #if IS_ENABLED(CONFIG_RTC_INTF_PROC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) static int mrst_procfs(struct device *dev, struct seq_file *seq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) unsigned char rtc_control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) spin_lock_irq(&rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) rtc_control = vrtc_cmos_read(RTC_CONTROL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) spin_unlock_irq(&rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) seq_printf(seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) "periodic_IRQ\t: %s\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) "alarm\t\t: %s\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) "BCD\t\t: no\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) "periodic_freq\t: daily (not adjustable)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) (rtc_control & RTC_PIE) ? "on" : "off",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) (rtc_control & RTC_AIE) ? "on" : "off");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) #define mrst_procfs NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) static const struct rtc_class_ops mrst_rtc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) .read_time = mrst_read_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) .set_time = mrst_set_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) .read_alarm = mrst_read_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) .set_alarm = mrst_set_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) .proc = mrst_procfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) .alarm_irq_enable = mrst_rtc_alarm_irq_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) static struct mrst_rtc mrst_rtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) * When vRTC IRQ is captured by SCU FW, FW will clear the AIE bit in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) * Reg B, so no need for this driver to clear it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) static irqreturn_t mrst_rtc_irq(int irq, void *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) u8 irqstat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) spin_lock(&rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) /* This read will clear all IRQ flags inside Reg C */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) irqstat = vrtc_cmos_read(RTC_INTR_FLAGS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) spin_unlock(&rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) irqstat &= RTC_IRQMASK | RTC_IRQF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (is_intr(irqstat)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) rtc_update_irq(p, 1, irqstat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) return IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) static int vrtc_mrst_do_probe(struct device *dev, struct resource *iomem,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) int rtc_irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) int retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) unsigned char rtc_control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) /* There can be only one ... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) if (mrst_rtc.dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) if (!iomem)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) iomem = devm_request_mem_region(dev, iomem->start, resource_size(iomem),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) driver_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) if (!iomem) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) dev_dbg(dev, "i/o mem already in use.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) mrst_rtc.irq = rtc_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) mrst_rtc.dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) dev_set_drvdata(dev, &mrst_rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) mrst_rtc.rtc = devm_rtc_allocate_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) if (IS_ERR(mrst_rtc.rtc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) return PTR_ERR(mrst_rtc.rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) mrst_rtc.rtc->ops = &mrst_rtc_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) rename_region(iomem, dev_name(&mrst_rtc.rtc->dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) spin_lock_irq(&rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) mrst_irq_disable(&mrst_rtc, RTC_PIE | RTC_AIE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) rtc_control = vrtc_cmos_read(RTC_CONTROL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) spin_unlock_irq(&rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) if (!(rtc_control & RTC_24H) || (rtc_control & (RTC_DM_BINARY)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) dev_dbg(dev, "TODO: support more than 24-hr BCD mode\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) if (rtc_irq) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) retval = devm_request_irq(dev, rtc_irq, mrst_rtc_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 0, dev_name(&mrst_rtc.rtc->dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) mrst_rtc.rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) if (retval < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) dev_dbg(dev, "IRQ %d is already in use, err %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) rtc_irq, retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) goto cleanup0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) retval = rtc_register_device(mrst_rtc.rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) goto cleanup0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) dev_dbg(dev, "initialised\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) cleanup0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) mrst_rtc.dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) dev_err(dev, "rtc-mrst: unable to initialise\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) static void rtc_mrst_do_shutdown(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) spin_lock_irq(&rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) mrst_irq_disable(&mrst_rtc, RTC_IRQMASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) spin_unlock_irq(&rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) static void rtc_mrst_do_remove(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) struct mrst_rtc *mrst = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) rtc_mrst_do_shutdown();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) mrst->rtc = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) mrst->dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) #ifdef CONFIG_PM_SLEEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) static int mrst_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) struct mrst_rtc *mrst = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) unsigned char tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) /* Only the alarm might be a wakeup event source */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) spin_lock_irq(&rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) mrst->suspend_ctrl = tmp = vrtc_cmos_read(RTC_CONTROL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) if (tmp & (RTC_PIE | RTC_AIE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) unsigned char mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) if (device_may_wakeup(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) mask = RTC_IRQMASK & ~RTC_AIE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) mask = RTC_IRQMASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) tmp &= ~mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) vrtc_cmos_write(tmp, RTC_CONTROL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) mrst_checkintr(mrst, tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) spin_unlock_irq(&rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (tmp & RTC_AIE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) mrst->enabled_wake = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) enable_irq_wake(mrst->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) dev_dbg(&mrst_rtc.rtc->dev, "suspend%s, ctrl %02x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) (tmp & RTC_AIE) ? ", alarm may wake" : "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) * We want RTC alarms to wake us from the deep power saving state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) static inline int mrst_poweroff(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) return mrst_suspend(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) static int mrst_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) struct mrst_rtc *mrst = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) unsigned char tmp = mrst->suspend_ctrl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) /* Re-enable any irqs previously active */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) if (tmp & RTC_IRQMASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) unsigned char mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (mrst->enabled_wake) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) disable_irq_wake(mrst->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) mrst->enabled_wake = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) spin_lock_irq(&rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) vrtc_cmos_write(tmp, RTC_CONTROL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) mask = vrtc_cmos_read(RTC_INTR_FLAGS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) mask &= (tmp & RTC_IRQMASK) | RTC_IRQF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) if (!is_intr(mask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) rtc_update_irq(mrst->rtc, 1, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) tmp &= ~RTC_AIE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) } while (mask & RTC_AIE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) spin_unlock_irq(&rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) dev_dbg(&mrst_rtc.rtc->dev, "resume, ctrl %02x\n", tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) static SIMPLE_DEV_PM_OPS(mrst_pm_ops, mrst_suspend, mrst_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) #define MRST_PM_OPS (&mrst_pm_ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) #define MRST_PM_OPS NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) static inline int mrst_poweroff(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) return -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) static int vrtc_mrst_platform_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) return vrtc_mrst_do_probe(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) platform_get_resource(pdev, IORESOURCE_MEM, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) platform_get_irq(pdev, 0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) static int vrtc_mrst_platform_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) rtc_mrst_do_remove(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) static void vrtc_mrst_platform_shutdown(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) if (system_state == SYSTEM_POWER_OFF && !mrst_poweroff(&pdev->dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) rtc_mrst_do_shutdown();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) MODULE_ALIAS("platform:vrtc_mrst");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) static struct platform_driver vrtc_mrst_platform_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) .probe = vrtc_mrst_platform_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) .remove = vrtc_mrst_platform_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) .shutdown = vrtc_mrst_platform_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) .name = driver_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) .pm = MRST_PM_OPS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) module_platform_driver(vrtc_mrst_platform_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) MODULE_AUTHOR("Jacob Pan; Feng Tang");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) MODULE_DESCRIPTION("Driver for Moorestown virtual RTC");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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