From patchwork Mon Mar 10 11:36:34 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ilya Chichkov X-Patchwork-Id: 14009668 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 98DB6C282DE for ; Mon, 10 Mar 2025 11:39:16 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1trbTH-0001Fx-Ie; Mon, 10 Mar 2025 07:38:59 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1trbT6-0001Ex-4S for qemu-devel@nongnu.org; Mon, 10 Mar 2025 07:38:52 -0400 Received: from mta-03.yadro.com ([89.207.88.253]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1trbSz-0004xu-Dl for qemu-devel@nongnu.org; Mon, 10 Mar 2025 07:38:45 -0400 DKIM-Filter: OpenDKIM Filter v2.11.0 mta-03.yadro.com 5FC62E000D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yadro.com; s=mta-04; t=1741606716; bh=zygtVR89aj1WvkgCgaFfSujeOcDwG+D/ur8mD5S0nU8=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:From; b=kyw8prmPe641nkGzz7+dRf13QBN9Ya6kyxLiiGRZaT/bmIfGCP775+2TgQy9yZlIi UogTnw1KGv3nqPwIB+OSNmX+xYVncgdpF9YtLq5choNp3GCve4OdmYJDPkMe7UFJYO +547HSyBXWnMRgqiEf8ClqjdsxFh9RTGZoMsqt5QW/zc9wqLFKyblfRRshJAdF5wWr s1Lfynm7bykQo+tZQwpqNJymoCz33lzmFwWmbiKjuauwt5TWaHAjHLEwXoDBJjm+Re Ea+hfG4eov7/3Y0d0qBHzSd5+ACSe9nYLwn47eGd371DtMTujU1tVYS4vioGZ6Xgm8 7ydMRrdv2BSBQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yadro.com; s=mta-03; t=1741606716; bh=zygtVR89aj1WvkgCgaFfSujeOcDwG+D/ur8mD5S0nU8=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:From; b=JWPK3k3AwoU1uHuVqIug2AkAuLLGe3Rz6LkRFcChM+gWNmxbIlxZ8C1DyOyf3aPSF OTN5ZhVzASOTUdOJyzFfKp3v2bm7vzOYs4CTY1fVRAumrjD2Lr/PycTF2822xGcsLS j2E1SI1W142BFNZ9SCmT0/AEi4I42jwZEHYVfsuk9fSVxe4lAlX6ZMi9Nv+rOhPb1x cvPK7qPH1z55ZjgmlfYW3TDN7ZmghDtvr+9iJLLFXPDRZKNZoc43ZFV0BIWA2Gw9sa QkLhtKVVOjUxnfpYmKGWTa9GF8yTyOBNBer+zkeUXVzHAnm7mf17gK9dX++Y5G2Eu8 Tp2SnbBHA/ivQ== From: Ilya Chichkov To: Paolo Bonzini , Peter Maydell CC: , , Ilya Chichkov Subject: [PATCH v2] hw/rtc: Add RTC PCF8563 module Date: Mon, 10 Mar 2025 14:36:34 +0300 Message-ID: <20250310113635.349822-1-i.chichkov@yadro.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-ClientProxiedBy: T-EXCH-08.corp.yadro.com (172.17.11.58) To T-EXCH-12.corp.yadro.com (172.17.11.143) Received-SPF: pass client-ip=89.207.88.253; envelope-from=i.chichkov@yadro.com; helo=mta-03.yadro.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Add PCF8563 a real-time clock with calendar and I2C interface. This commit adds support for interfacing with it and implements functionality of setting timer, alarm, reading and writing time. Signed-off-by: Ilya Chichkov --- v1->v2 Phil: - Add hot reset - Fix trace message - Add testing coverage with qtest Bernhard: - Move datasheet link to source code top comment section - Fix typos - Update licence identifier to SPDX - Remove unused import libraries - Change OBJECT_CHECK to OBJECT_DECLARE_SIMPLE_TYPE - Remove outdated comment - Rename i2c to parent_obj - Moved get_time inside capture_time function that is called only when I2C request starts - Add fields inside VMStateDescription - Removed pcf8563_realize - Change type_init to DEFINE_TYPES --- hw/rtc/Kconfig | 5 + hw/rtc/meson.build | 1 + hw/rtc/pcf8563_rtc.c | 740 +++++++++++++++++++++++++++++++++++++++++++ hw/rtc/trace-events | 12 + 4 files changed, 758 insertions(+) create mode 100644 hw/rtc/pcf8563_rtc.c diff --git a/hw/rtc/Kconfig b/hw/rtc/Kconfig index b90c2e510a..4e7a1f75ef 100644 --- a/hw/rtc/Kconfig +++ b/hw/rtc/Kconfig @@ -27,5 +27,10 @@ config GOLDFISH_RTC config LS7A_RTC bool +config PCF8563_RTC + bool + depends on I2C + default y if I2C_DEVICES + config STM32_RTC bool \ No newline at end of file diff --git a/hw/rtc/meson.build b/hw/rtc/meson.build index b6bb7436c7..6180ffc6d9 100644 --- a/hw/rtc/meson.build +++ b/hw/rtc/meson.build @@ -13,4 +13,5 @@ system_ss.add(when: 'CONFIG_GOLDFISH_RTC', if_true: files('goldfish_rtc.c')) system_ss.add(when: 'CONFIG_LS7A_RTC', if_true: files('ls7a_rtc.c')) system_ss.add(when: 'CONFIG_ALLWINNER_H3', if_true: files('allwinner-rtc.c')) system_ss.add(when: 'CONFIG_MC146818RTC', if_true: files('mc146818rtc.c')) +system_ss.add(when: 'CONFIG_PCF8563_RTC', if_true: files('pcf8563_rtc.c')) system_ss.add(when: 'CONFIG_STM32_RTC', if_true: files('stm32-rtc.c')) diff --git a/hw/rtc/pcf8563_rtc.c b/hw/rtc/pcf8563_rtc.c new file mode 100644 index 0000000000..195b697598 --- /dev/null +++ b/hw/rtc/pcf8563_rtc.c @@ -0,0 +1,740 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Real-time clock/calendar PCF8563 with I2C interface. + * + * Datasheet: https://www.nxp.com/docs/en/data-sheet/PCF8563.pdf + * + * Author (c) 2024 Ilya Chichkov + */ + +#include "qemu/osdep.h" +#include "hw/sysbus.h" +#include "hw/register.h" +#include "hw/registerfields.h" +#include "hw/irq.h" +#include "qemu/bitops.h" +#include "hw/qdev-properties.h" +#include "qemu/timer.h" +#include "hw/i2c/i2c.h" +#include "qemu/bcd.h" +#include "qom/object.h" +#include "sysemu/sysemu.h" +#include "sysemu/rtc.h" +#include "migration/vmstate.h" +#include "qapi/visitor.h" + +#include "trace.h" + +#define TYPE_PCF8563 "pcf8563" +OBJECT_DECLARE_SIMPLE_TYPE(Pcf8563State, PCF8563) + +#define PCF8563_CS1 0x00 +#define PCF8563_CS2 0x01 +#define PCF8563_VLS 0x02 +#define PCF8563_MINUTES 0x03 +#define PCF8563_HOURS 0x04 +#define PCF8563_DAYS 0x05 +#define PCF8563_WEEKDAYS 0x06 +#define PCF8563_CENTURY_MONTHS 0x07 +#define PCF8563_YEARS 0x08 +#define PCF8563_MINUTE_A 0x09 +#define PCF8563_HOUR_A 0x0A +#define PCF8563_DAY_A 0x0B +#define PCF8563_WEEKDAY_A 0x0C +#define PCF8563_CLKOUT_CTL 0x0D +#define PCF8563_TIMER_CTL 0x0E +#define PCF8563_TIMER 0x0F + +#define MINUTES_IN_HOUR 60 +#define HOURS_IN_DAY 24 +#define DAYS_IN_MONTH 31 +#define DAYS_IN_WEEK 7 + +REG8(PCF8563_CS1, 0x00) + FIELD(PCF8563_CS1, RSVD0, 0, 3) + FIELD(PCF8563_CS1, TESTC, 3, 1) + FIELD(PCF8563_CS1, RSVD1, 4, 1) + FIELD(PCF8563_CS1, STOP, 5, 1) + FIELD(PCF8563_CS1, RSVD2, 6, 1) + FIELD(PCF8563_CS1, TEST1, 7, 1) + +REG8(PCF8563_CS2, 0x01) + FIELD(PCF8563_CS2, TIE, 0, 1) + FIELD(PCF8563_CS2, AIE, 1, 1) + FIELD(PCF8563_CS2, TF, 2, 1) + FIELD(PCF8563_CS2, AF, 3, 1) + FIELD(PCF8563_CS2, TI_TP, 4, 1) + FIELD(PCF8563_CS2, RSVD, 5, 3) + +REG8(PCF8563_VLS, 0x02) + FIELD(PCF8563_VLS, SECONDS, 0, 7) + FIELD(PCF8563_VLS, VL, 7, 1) + +REG8(PCF8563_MINUTES, 0x03) + FIELD(PCF8563_MINUTES, MINUTES, 0, 7) + FIELD(PCF8563_MINUTES, RSVD, 7, 1) + +REG8(PCF8563_HOURS, 0x04) + FIELD(PCF8563_HOURS, HOURS, 0, 6) + FIELD(PCF8563_HOURS, RSVD, 6, 2) + +REG8(PCF8563_DAYS, 0x05) + FIELD(PCF8563_DAYS, DAYS, 0, 6) + FIELD(PCF8563_DAYS, RSVD, 6, 2) + +REG8(PCF8563_WEEKDAYS, 0x06) + FIELD(PCF8563_WEEKDAYS, WEEKDAYS, 0, 3) + FIELD(PCF8563_WEEKDAYS, RSVD, 3, 5) + +REG8(PCF8563_CENTURY_MONTHS, 0x07) + FIELD(PCF8563_CENTURY_MONTHS, MONTHS, 0, 5) + FIELD(PCF8563_CENTURY_MONTHS, RSVD, 5, 2) + FIELD(PCF8563_CENTURY_MONTHS, CENTURY, 7, 1) + +REG8(PCF8563_YEARS, 0x08) + FIELD(PCF8563_YEARS, YEARS, 0, 8) + +REG8(PCF8563_MINUTE_A, 0x09) + FIELD(PCF8563_MINUTE_A, MINUTE_A, 0, 7) + FIELD(PCF8563_MINUTE_A, AE_M, 7, 1) + +REG8(PCF8563_HOUR_A, 0x0A) + FIELD(PCF8563_HOUR_A, HOUR_A, 0, 7) + FIELD(PCF8563_HOUR_A, AE_H, 7, 1) + +REG8(PCF8563_DAY_A, 0x0B) + FIELD(PCF8563_DAY_A, DAY_A, 0, 7) + FIELD(PCF8563_DAY_A, AE_D, 7, 1) + +REG8(PCF8563_WEEKDAY_A, 0x0C) + FIELD(PCF8563_WEEKDAY_A, WEEKDAY_A, 0, 3) + FIELD(PCF8563_WEEKDAY_A, RSVD, 3, 4) + FIELD(PCF8563_WEEKDAY_A, AE_W, 7, 1) + +REG8(PCF8563_CLKOUT_CTL, 0x0D) + FIELD(PCF8563_CLKOUT_CTL, FD, 0, 2) + FIELD(PCF8563_CLKOUT_CTL, RSVD, 2, 5) + FIELD(PCF8563_CLKOUT_CTL, FE, 7, 1) + +REG8(PCF8563_TIMER_CTL, 0x0E) + FIELD(PCF8563_TIMER_CTL, TD, 0, 2) + FIELD(PCF8563_TIMER_CTL, RSVD, 2, 5) + FIELD(PCF8563_TIMER_CTL, TE, 7, 1) + +REG8(PCF8563_TIMER, 0x0F) + FIELD(PCF8563_TIMER, TIMER, 0, 8) + +typedef struct Pcf8563State { + I2CSlave parent_obj; + + struct tm current_time; + qemu_irq irq; + + uint8_t read_index; + uint8_t write_index; + uint8_t reg_addr; + + /* Control and status */ + uint8_t cs1; + uint8_t cs2; + /* Counters */ + uint8_t vls; + uint8_t minutes; + uint8_t hours; + uint8_t days; + uint8_t weekdays; + uint8_t centure_months; + uint8_t years; + /* Alarm registers */ + uint8_t minute_a; + uint8_t hour_a; + uint8_t day_a; + uint8_t weekday_a; + /* Timer control */ + uint8_t clkout_ctl; + uint8_t timer_ctl; + uint8_t timer_cnt; + + QEMUTimer *alarm_timer; + struct tm tm_alarm; + bool alarm_irq; + QEMUTimer *timer; + time_t time_offset; + time_t stop_time; + QEMUTimer *irq_gen_timer; +} Pcf8563State; + +static uint16_t get_src_freq(Pcf8563State *s, bool *multiply) +{ + *multiply = false; + /* Select source clock frequency (Hz) */ + switch (FIELD_EX8(s->timer_ctl, PCF8563_TIMER_CTL, TD)) { + case 0: + return 4096; + case 1: + return 64; + case 2: + return 1; + case 3: + *multiply = true; + return 60; + default: + return 0; + } +} + +static uint16_t get_irq_pulse_freq(Pcf8563State *s) +{ + if (s->timer_cnt > 1) { + switch (FIELD_EX8(s->timer_ctl, PCF8563_TIMER_CTL, TD)) { + case 0: + return 8192; + case 1: + return 128; + case 2: + case 3: + return 64; + default: + return 0; + } + } else { + if (FIELD_EX8(s->timer_ctl, PCF8563_TIMER_CTL, TD) == 0) { + return 4096; + } + return 64; + } + +} + +static void timer_irq(Pcf8563State *s) +{ + if (!FIELD_EX8(s->cs2, PCF8563_CS2, TIE)) { + return; + } + + if (FIELD_EX8(s->cs2, PCF8563_CS2, TI_TP)) { + qemu_irq_pulse(s->irq); + + /* Start IRQ pulse generator */ + uint64_t delay = s->timer_cnt * + NANOSECONDS_PER_SECOND * + get_irq_pulse_freq(s); + timer_mod(s->irq_gen_timer, + qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + delay); + } else { + qemu_irq_raise(s->irq); + } +} + +static void alarm_irq(Pcf8563State *s) +{ + if (FIELD_EX8(s->cs2, PCF8563_CS2, AIE)) { + qemu_irq_raise(s->irq); + } +} + +static void set_alarm(Pcf8563State *s) +{ + uint64_t diff_sec = 0; + uint64_t diff_min = 0; + uint64_t diff_hour = 0; + uint64_t diff_day = 0; + uint64_t diff_wday = 0; + uint64_t delay = 0; + uint64_t now_cl = 0; + struct tm now; + + bool is_min_en = !FIELD_EX8(s->minute_a, PCF8563_MINUTE_A, AE_M); + bool is_hour_en = !FIELD_EX8(s->hour_a, PCF8563_HOUR_A, AE_H); + bool is_day_en = !FIELD_EX8(s->day_a, PCF8563_DAY_A, AE_D); + bool is_wday_en = !FIELD_EX8(s->weekday_a, PCF8563_WEEKDAY_A, AE_W); + if (!is_day_en && !is_wday_en && !is_hour_en && !is_min_en) { + if (s->alarm_timer) { + timer_del(s->alarm_timer); + } + return; + } + + qemu_get_timedate(&now, s->time_offset); + + if (is_min_en) { + if (s->tm_alarm.tm_min > s->current_time.tm_min) { + diff_min = s->tm_alarm.tm_min - s->current_time.tm_min; + } else { + diff_min = (MINUTES_IN_HOUR - + s->current_time.tm_min + s->tm_alarm.tm_min); + } + } + + if (is_hour_en) { + if (s->tm_alarm.tm_hour > s->current_time.tm_hour) { + diff_hour = s->tm_alarm.tm_hour - s->current_time.tm_hour; + } else { + diff_hour = (HOURS_IN_DAY - + s->current_time.tm_hour + s->tm_alarm.tm_hour); + } + } + + if (is_day_en) { + if (s->tm_alarm.tm_mday > s->current_time.tm_mday) { + diff_day = s->tm_alarm.tm_mday - s->current_time.tm_mday; + } else { + diff_day = (DAYS_IN_MONTH - + s->current_time.tm_mday + s->tm_alarm.tm_mday); + } + } + + if (is_wday_en) { + if (s->tm_alarm.tm_wday > s->current_time.tm_wday) { + diff_wday = s->tm_alarm.tm_wday - s->current_time.tm_wday; + } else { + diff_wday = (DAYS_IN_WEEK - + s->current_time.tm_wday + s->tm_alarm.tm_wday); + } + } + + diff_sec = (diff_min * 60) + + (diff_hour * 60 * 60) + + (diff_day * 24 * 60 * 60) + + (diff_wday * 24 * 60 * 60); + now_cl = muldiv64(qemu_clock_get_ns(rtc_clock), 1, NANOSECONDS_PER_SECOND); + delay = muldiv64((now_cl + diff_sec), NANOSECONDS_PER_SECOND, 1); + + if (s->alarm_timer) { + timer_del(s->alarm_timer); + } + timer_mod(s->alarm_timer, delay); +} + +static void pcf8563_update_irq(Pcf8563State *s) +{ + if (FIELD_EX8(s->cs2, PCF8563_CS2, TF)) { + timer_irq(s); + } + + if (FIELD_EX8(s->cs2, PCF8563_CS2, AF)) { + alarm_irq(s); + } +} + +static void alarm_timer_cb(void *opaque) +{ + Pcf8563State *s = PCF8563(opaque); + + set_alarm(s); + s->cs2 = FIELD_DP8(s->cs2, PCF8563_CS2, AF, 1); + pcf8563_update_irq(s); +} + +static void timer_cb(void *opaque) +{ + Pcf8563State *s = PCF8563(opaque); + + s->timer_cnt = 0; + s->cs2 = FIELD_DP8(s->cs2, PCF8563_CS2, TF, 1); + pcf8563_update_irq(s); +} + +static void irq_gen_timer_cb(void *opaque) +{ + Pcf8563State *s = PCF8563(opaque); + + pcf8563_update_irq(s); +} + +static inline void capture_time(Pcf8563State *s) +{ + qemu_get_timedate(&s->current_time, s->time_offset); + trace_pcf8563_rtc_capture_time(); +} + +static void set_time(Pcf8563State *s, struct tm *tm) +{ + s->time_offset = qemu_timedate_diff(tm); + set_alarm(s); + trace_pcf8563_rtc_set_time(); +} + +static void pcf8563_reset(I2CSlave *i2c) +{ + Pcf8563State *s = PCF8563(i2c); + + s->read_index = 0; + s->write_index = 0; + s->reg_addr = 0; + + s->cs1 = 0x8; + s->cs2 = 0x0; + s->vls = 0x80; + s->minutes = 0x0; + s->hours = 0x0; + s->days = 0x0; + s->weekdays = 0x0; + s->centure_months = 0x0; + s->years = 0x0; + s->minute_a = 0x80; + s->hour_a = 0x80; + s->day_a = 0x80; + s->weekday_a = 0x80; + s->clkout_ctl = 0x80; + s->timer_ctl = 0x3; + s->timer_cnt = 0x0; + + s->stop_time = 0; + s->reg_addr = 0; + + s->alarm_irq = false; + s->time_offset = 0; + + qemu_irq_lower(s->irq); + qemu_get_timedate(&s->tm_alarm, 0); + + timer_del(s->alarm_timer); + timer_del(s->timer); +} + +static void pcf8563_read(Pcf8563State *s, uint8_t *result) +{ + struct tm *tm = &s->current_time; + + bool multiply = false; + uint16_t src_freq = get_src_freq(s, &multiply); + + switch (s->reg_addr) { + case PCF8563_CS1: + *result = s->cs1; + break; + case PCF8563_CS2: + *result = s->cs2; + break; + case PCF8563_VLS: + *result = (s->vls & 0x80) | to_bcd(tm->tm_sec); + break; + case PCF8563_MINUTES: + *result = to_bcd(tm->tm_min); + break; + case PCF8563_HOURS: + *result = to_bcd(tm->tm_hour); + break; + case PCF8563_DAYS: + *result = to_bcd(tm->tm_mday); + break; + case PCF8563_WEEKDAYS: + *result = to_bcd(tm->tm_wday); + break; + case PCF8563_CENTURY_MONTHS: + *result = to_bcd(tm->tm_mon + 1); + break; + case PCF8563_YEARS: + *result = to_bcd((tm->tm_year + 1900) % 100); + break; + case PCF8563_MINUTE_A: + *result = s->minute_a; + break; + case PCF8563_HOUR_A: + *result = s->hour_a; + break; + case PCF8563_DAY_A: + *result = s->day_a; + break; + case PCF8563_WEEKDAY_A: + *result = s->weekday_a; + break; + case PCF8563_CLKOUT_CTL: + *result = s->clkout_ctl; + break; + case PCF8563_TIMER_CTL: + *result = s->timer_ctl; + break; + case PCF8563_TIMER: + if (timer_pending(s->timer)) { + uint64_t expire_time_s = muldiv64(timer_expire_time_ns(s->timer), + 1, + NANOSECONDS_PER_SECOND); + if (multiply) { + s->timer_cnt = muldiv64(expire_time_s, 1, src_freq); + } else { + s->timer_cnt = muldiv64(expire_time_s, src_freq, 1); + } + } + *result = s->timer_cnt; + break; + } +} + +static void pcf8563_write(Pcf8563State *s, uint8_t val) +{ + struct tm *tm = &s->current_time; + int tmp; + + switch (s->reg_addr) { + case PCF8563_CS1: + s->cs1 = val & 0xa8; + break; + case PCF8563_CS2: + s->cs2 = val & 0x1f; + break; + case PCF8563_VLS: + tmp = from_bcd(FIELD_EX8(val, PCF8563_VLS, SECONDS)); + if (tmp >= 0 && tmp <= 59) { + tm->tm_sec = tmp; + set_time(s, tm); + } + + bool vl = FIELD_EX8(val, PCF8563_VLS, VL); + + if (vl ^ (s->vls & 0x80)) { + if (vl) { + /* Clock integrity is not guaranteed */ + s->stop_time = time(NULL); + } else if (s->stop_time != 0) { + s->time_offset += s->stop_time - time(NULL); + s->stop_time = 0; + } + } + + s->vls = vl << 8; + break; + case PCF8563_MINUTES: + tmp = from_bcd(FIELD_EX8(val, PCF8563_MINUTES, MINUTES)); + if (tmp >= 0 && tmp <= 59) { + s->minutes = val; + tm->tm_min = tmp; + set_time(s, tm); + } + break; + case PCF8563_HOURS: + tmp = from_bcd(FIELD_EX8(val, PCF8563_HOURS, HOURS)); + if (tmp >= 0 && tmp <= 23) { + s->hours = val; + tm->tm_hour = tmp; + set_time(s, tm); + } + break; + case PCF8563_DAYS: + tmp = from_bcd(FIELD_EX8(val, PCF8563_DAYS, DAYS)); + if (tmp >= 1 && tmp <= 31) { + s->days = val; + tm->tm_mday = tmp; + set_time(s, tm); + } + break; + case PCF8563_WEEKDAYS: + tmp = from_bcd(FIELD_EX8(val, PCF8563_WEEKDAYS, WEEKDAYS)); + if (tmp >= 0 && tmp <= 6) { + s->weekdays = val; + tm->tm_wday = tmp; + set_time(s, tm); + } + break; + case PCF8563_CENTURY_MONTHS: + tmp = from_bcd(FIELD_EX8(val, PCF8563_CENTURY_MONTHS, MONTHS)); + if (tmp >= 0 && tmp <= 12) { + s->centure_months = val; + tm->tm_mon = tmp; + set_time(s, tm); + } + break; + case PCF8563_YEARS: + tmp = from_bcd(FIELD_EX8(val, PCF8563_YEARS, YEARS)); + if (tmp >= 0 && tmp <= 99) { + s->years = val; + tm->tm_year = tmp + 100; + set_time(s, tm); + } + break; + case PCF8563_MINUTE_A: + s->minute_a = val; + tmp = from_bcd(FIELD_EX8(val, PCF8563_MINUTE_A, MINUTE_A)); + if (tmp >= 0 && tmp <= 59) { + s->tm_alarm.tm_min = tmp; + set_alarm(s); + } + break; + case PCF8563_HOUR_A: + s->hour_a = val & 0xbf; + tmp = from_bcd(FIELD_EX8(val, PCF8563_HOUR_A, HOUR_A)); + if (tmp >= 0 && tmp <= 23) { + s->tm_alarm.tm_hour = tmp; + set_alarm(s); + } + break; + case PCF8563_DAY_A: + s->day_a = val & 0xbf; + tmp = from_bcd(FIELD_EX8(val, PCF8563_DAY_A, DAY_A)); + if (tmp >= 1 && tmp <= 31) { + s->tm_alarm.tm_mday = tmp; + set_alarm(s); + } + break; + case PCF8563_WEEKDAY_A: + s->weekday_a = val & 0x87; + tmp = from_bcd(FIELD_EX8(val, PCF8563_WEEKDAY_A, WEEKDAY_A)); + if (tmp >= 0 && tmp <= 6) { + s->tm_alarm.tm_wday = tmp; + set_alarm(s); + } + break; + case PCF8563_CLKOUT_CTL: + s->clkout_ctl = val & 0x83; + break; + case PCF8563_TIMER_CTL: + s->timer_ctl = val & 0x83; + + if (!FIELD_EX32(s->timer_ctl, PCF8563_TIMER_CTL, TE)) { + if (timer_pending(s->timer)) { + timer_del(s->timer); + } + } + break; + case PCF8563_TIMER: + s->timer_cnt = val; + if (FIELD_EX32(s->timer_ctl, PCF8563_TIMER_CTL, TE)) { + bool multiply = false; + uint16_t src_freq = get_src_freq(s, &multiply); + uint64_t delay = 0; + + /* Calculate timer's delay in ns based on value and set it up */ + if (multiply) { + delay = val * NANOSECONDS_PER_SECOND * src_freq; + } else { + delay = val * NANOSECONDS_PER_SECOND / src_freq; + } + timer_mod(s->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + delay); + } + break; + } +} + +static uint8_t pcf8563_rx(I2CSlave *i2c) +{ + Pcf8563State *s = PCF8563(i2c); + uint8_t result = 0xff; + + pcf8563_read(s, &result); + /* Auto-increment register address */ + s->reg_addr++; + + trace_pcf8563_rtc_read(s->read_index, result); + return result; +} + +static int pcf8563_tx(I2CSlave *i2c, uint8_t data) +{ + Pcf8563State *s = PCF8563(i2c); + + if (s->write_index == 0) { + /* Receive register address */ + s->reg_addr = data; + s->write_index++; + trace_pcf8563_rtc_write_addr(data); + } else { + /* Receive data to write */ + pcf8563_write(s, data); + s->write_index++; + s->reg_addr++; + trace_pcf8563_rtc_write_data(data); + } + return 0; +} + +static int pcf8563_event(I2CSlave *i2c, enum i2c_event event) +{ + trace_pcf8563_rtc_event(event); + Pcf8563State *s = PCF8563(i2c); + + switch (event) { + case I2C_START_RECV: + capture_time(s); + break; + case I2C_FINISH: + s->read_index = 0; + s->write_index = 0; + default: + break; + } + return 0; +} + +static const VMStateDescription vmstate_pcf8563 = { + .name = "PCF8563", + .version_id = 0, + .minimum_version_id = 0, + .fields = (const VMStateField[]) { + VMSTATE_I2C_SLAVE(parent_obj, Pcf8563State), + VMSTATE_UINT8(read_index, Pcf8563State), + VMSTATE_UINT8(write_index, Pcf8563State), + VMSTATE_UINT8(reg_addr, Pcf8563State), + VMSTATE_UINT8(cs1, Pcf8563State), + VMSTATE_UINT8(cs2, Pcf8563State), + VMSTATE_UINT8(vls, Pcf8563State), + VMSTATE_UINT8(minutes, Pcf8563State), + VMSTATE_UINT8(hours, Pcf8563State), + VMSTATE_UINT8(days, Pcf8563State), + VMSTATE_UINT8(weekdays, Pcf8563State), + VMSTATE_UINT8(centure_months, Pcf8563State), + VMSTATE_UINT8(years, Pcf8563State), + VMSTATE_UINT8(minute_a, Pcf8563State), + VMSTATE_UINT8(hour_a, Pcf8563State), + VMSTATE_UINT8(day_a, Pcf8563State), + VMSTATE_UINT8(weekday_a, Pcf8563State), + VMSTATE_UINT8(clkout_ctl, Pcf8563State), + VMSTATE_UINT8(timer_ctl, Pcf8563State), + VMSTATE_UINT8(timer_cnt, Pcf8563State), + VMSTATE_TIMER_PTR(timer, Pcf8563State), + VMSTATE_TIMER_PTR(irq_gen_timer, Pcf8563State), + VMSTATE_TIMER_PTR(alarm_timer, Pcf8563State), + VMSTATE_END_OF_LIST() + } +}; + +static void pcf8563_init(Object *obj) +{ + I2CSlave *i2c = I2C_SLAVE(obj); + Pcf8563State *s = PCF8563(obj); + + s->alarm_timer = timer_new_ns(rtc_clock, &alarm_timer_cb, s); + s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &timer_cb, s); + s->irq_gen_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &irq_gen_timer_cb, s); + + qdev_init_gpio_out(DEVICE(s), &s->irq, 1); + + pcf8563_reset(i2c); + + trace_pcf8563_rtc_init(); + + s->reg_addr = 0x09; + pcf8563_write(s, 0x81); + set_alarm(s); +} + +static void pcf8563_reset_hold(Object *obj, ResetType type) +{ + I2CSlave *i2c = I2C_SLAVE(obj); + pcf8563_reset(i2c); +} + +static void pcf8563_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + I2CSlaveClass *k = I2C_SLAVE_CLASS(klass); + ResettableClass *rc = RESETTABLE_CLASS(klass); + + k->event = pcf8563_event; + k->recv = pcf8563_rx; + k->send = pcf8563_tx; + dc->vmsd = &vmstate_pcf8563; + rc->phases.hold = pcf8563_reset_hold; +} + +static const TypeInfo pcf8563_register_types[] = { + { + .name = TYPE_PCF8563, + .parent = TYPE_I2C_SLAVE, + .instance_size = sizeof(Pcf8563State), + .instance_init = pcf8563_init, + .class_init = pcf8563_class_init, + }, +}; + +DEFINE_TYPES(pcf8563_register_types) diff --git a/hw/rtc/trace-events b/hw/rtc/trace-events index 743ff775d4..17c524d61d 100644 --- a/hw/rtc/trace-events +++ b/hw/rtc/trace-events @@ -43,3 +43,15 @@ stm32_rtc_arm_ointr(uint64_t tocks, uint64_t nsecs) "overflow interrupt in %" PR stm32_rtc_arm_aintr(uint64_t tocks, uint64_t nsecs) "alarm interrupt in %" PRIu64 " ticks, %" PRIu64" nsecs" stm32_rtc_read(uint64_t addr, uint64_t value, uint32_t size) "addr 0x%02" PRIx64 " value 0x%08" PRIx64" size %u" stm32_rtc_write(uint64_t addr, uint64_t value, uint32_t size) "addr 0x%02" PRIx64 " value 0x%08" PRIx64" size %u" + +# pcf8563_rtc.c +pcf8563_rtc_write_data(uint8_t data) "data: 0x%x" +pcf8563_rtc_write_addr(uint8_t addr) "register address: 0x%x" +pcf8563_rtc_read(uint8_t addr, uint8_t data) "addr: 0x%x, data: 0x%x" +pcf8563_rtc_event(uint8_t event) "Event: 0x%x" +pcf8563_rtc_init(void) +pcf8563_rtc_reset(void) +pcf8563_rtc_set_time(void) +pcf8563_rtc_get_time(void) +pcf8563_rtc_set_alarm(void) +pcf8563_rtc_capture_time(void)