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[Qemu-arm] [PATCH 3/4] hw/timer: Add Epson RX8900 RTC support
|
From: |
Alastair D'Silva |
|
Subject: |
[Qemu-arm] [PATCH 3/4] hw/timer: Add Epson RX8900 RTC support |
|
Date: |
Thu, 17 Nov 2016 15:36:39 +1100 |
From: Alastair D'Silva <address@hidden>
This patch adds support for the Epson RX8900 RTC chip.
Signed-off-by: Alastair D'Silva <address@hidden>
---
default-configs/arm-softmmu.mak | 1 +
hw/timer/Makefile.objs | 2 +
hw/timer/rx8900.c | 891 ++++++++++++++++++++++++++++++++++++++++
hw/timer/rx8900_regs.h | 125 ++++++
tests/Makefile.include | 2 +
tests/rx8900-test.c | 800 ++++++++++++++++++++++++++++++++++++
6 files changed, 1821 insertions(+)
create mode 100644 hw/timer/rx8900.c
create mode 100644 hw/timer/rx8900_regs.h
create mode 100644 tests/rx8900-test.c
diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
index 6de3e16..adb600e 100644
--- a/default-configs/arm-softmmu.mak
+++ b/default-configs/arm-softmmu.mak
@@ -29,6 +29,7 @@ CONFIG_SMC91C111=y
CONFIG_ALLWINNER_EMAC=y
CONFIG_IMX_FEC=y
CONFIG_DS1338=y
+CONFIG_RX8900=y
CONFIG_PFLASH_CFI01=y
CONFIG_PFLASH_CFI02=y
CONFIG_MICRODRIVE=y
diff --git a/hw/timer/Makefile.objs b/hw/timer/Makefile.objs
index 7ba8c23..fa028ac 100644
--- a/hw/timer/Makefile.objs
+++ b/hw/timer/Makefile.objs
@@ -3,6 +3,7 @@ common-obj-$(CONFIG_ARM_MPTIMER) += arm_mptimer.o
common-obj-$(CONFIG_A9_GTIMER) += a9gtimer.o
common-obj-$(CONFIG_CADENCE) += cadence_ttc.o
common-obj-$(CONFIG_DS1338) += ds1338.o
+common-obj-$(CONFIG_RX8900) += rx8900.o
common-obj-$(CONFIG_HPET) += hpet.o
common-obj-$(CONFIG_I8254) += i8254_common.o i8254.o
common-obj-$(CONFIG_M48T59) += m48t59.o
@@ -17,6 +18,7 @@ common-obj-$(CONFIG_IMX) += imx_epit.o
common-obj-$(CONFIG_IMX) += imx_gpt.o
common-obj-$(CONFIG_LM32) += lm32_timer.o
common-obj-$(CONFIG_MILKYMIST) += milkymist-sysctl.o
+common-obj-$(CONFIG_RX8900) += rx8900.o
obj-$(CONFIG_EXYNOS4) += exynos4210_mct.o
obj-$(CONFIG_EXYNOS4) += exynos4210_pwm.o
diff --git a/hw/timer/rx8900.c b/hw/timer/rx8900.c
new file mode 100644
index 0000000..208a31b
--- /dev/null
+++ b/hw/timer/rx8900.c
@@ -0,0 +1,891 @@
+/*
+ * Epson RX8900SA/CE Realtime Clock Module
+ *
+ * Copyright (c) 2016 IBM Corporation
+ * Authors:
+ * Alastair D'Silva <address@hidden>
+ *
+ * This code is licensed under the GPL version 2 or later. See
+ * the COPYING file in the top-level directory.
+ *
+ * Datasheet available at:
+ * https://support.epson.biz/td/api/doc_check.php?dl=app_RX8900CE&lang=en
+ *
+ * Not implemented:
+ * Implement Timer Counters
+ * Implement i2c timeout
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "hw/i2c/i2c.h"
+#include "hw/timer/rx8900_regs.h"
+#include "hw/ptimer.h"
+#include "qemu/main-loop.h"
+#include "qemu/bcd.h"
+#include "qemu/error-report.h"
+#include "qemu/log.h"
+#include "qapi/error.h"
+#include "qapi/visitor.h"
+
+ #include <sys/time.h>
+
+ #include <execinfo.h>
+
+#define TYPE_RX8900 "rx8900"
+#define RX8900(obj) OBJECT_CHECK(RX8900State, (obj), TYPE_RX8900)
+
+static bool log;
+
+typedef struct RX8900State {
+ I2CSlave parent_obj;
+
+ ptimer_state *sec_timer; /* triggered once per second */
+ ptimer_state *fout_timer;
+ ptimer_state *countdown_timer;
+ bool fout;
+ int64_t offset;
+ uint8_t weekday; /* Saved for deferred offset calculation, 0-6 */
+ uint8_t wday_offset;
+ uint8_t nvram[RX8900_NVRAM_SIZE];
+ int32_t ptr; /* Wrapped to stay within RX8900_NVRAM_SIZE */
+ bool addr_byte;
+ uint8_t last_interrupt_seconds;
+ uint8_t last_update_interrupt_minutes;
+ qemu_irq interrupt_pin;
+ qemu_irq fout_pin;
+} RX8900State;
+
+static const VMStateDescription vmstate_rx8900 = {
+ .name = "rx8900",
+ .version_id = 2,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_I2C_SLAVE(parent_obj, RX8900State),
+ VMSTATE_PTIMER(sec_timer, RX8900State),
+ VMSTATE_PTIMER(fout_timer, RX8900State),
+ VMSTATE_PTIMER(countdown_timer, RX8900State),
+ VMSTATE_BOOL(fout, RX8900State),
+ VMSTATE_INT64(offset, RX8900State),
+ VMSTATE_UINT8_V(weekday, RX8900State, 2),
+ VMSTATE_UINT8_V(wday_offset, RX8900State, 2),
+ VMSTATE_UINT8_ARRAY(nvram, RX8900State, RX8900_NVRAM_SIZE),
+ VMSTATE_INT32(ptr, RX8900State),
+ VMSTATE_BOOL(addr_byte, RX8900State),
+ VMSTATE_UINT8_V(last_interrupt_seconds, RX8900State, 2),
+ VMSTATE_UINT8_V(last_update_interrupt_minutes, RX8900State, 2),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void rx8900_reset(DeviceState *dev);
+static void disable_countdown_timer(RX8900State *s);
+static void enable_countdown_timer(RX8900State *s);
+static void disable_timer(RX8900State *s);
+static void enable_timer(RX8900State *s);
+
+#ifdef RX8900_TRACE
+#define RX8900_TRACE_BUF_SIZE 256
+/**
+ * Emit a trace message
+ * @param file the source filename
+ * @param line the line number the message was emitted from
+ * @param dev the RX8900 device
+ * @param fmt a printf style format
+ */
+static void trace(const char *file, int line, const char *func,
+ I2CSlave *dev, const char *fmt, ...)
+{
+ va_list ap;
+ char buf[RX8900_TRACE_BUF_SIZE];
+ char timestamp[32];
+ int len;
+ struct timeval now;
+ struct tm *now2;
+
+ gettimeofday(&now, NULL);
+ now2 = localtime(&now.tv_sec);
+
+ strftime(timestamp, sizeof(timestamp), "%F %T", now2);
+
+ len = snprintf(buf, sizeof(buf), "\n\t%s.%03ld %s:%s:%d: RX8900 %s
address@hidden: %s",
+ timestamp, now.tv_usec / 1000,
+ file, func, line, dev->qdev.id, dev->qdev.parent_bus->name,
+ dev->address, fmt);
+ if (len >= RX8900_TRACE_BUF_SIZE) {
+ error_report("%s:%d: Trace buffer overflow", file, line);
+ }
+
+ va_start(ap, fmt);
+ error_vreport(buf, ap);
+ va_end(ap);
+}
+
+/**
+ * Emit a trace message
+ * @param dev the RX8900 device
+ * @param fmt a printf format
+ */
+#define TRACE(dev, fmt, ...) \
+ do { \
+ if (log) { \
+ trace(__FILE__, __LINE__, __func__, &dev, fmt, ## __VA_ARGS__); \
+ } \
+ } while (0)
+#else
+#define TRACE(dev, fmt, ...)
+#endif
+
+static void capture_current_time(RX8900State *s)
+{
+ /* Capture the current time into the secondary registers
+ * which will be actually read by the data transfer operation.
+ */
+ struct tm now;
+ qemu_get_timedate(&now, s->offset);
+ s->nvram[SECONDS] = to_bcd(now.tm_sec);
+ s->nvram[MINUTES] = to_bcd(now.tm_min);
+ s->nvram[HOURS] = to_bcd(now.tm_hour);
+
+ s->nvram[WEEKDAY] = 0x01 << ((now.tm_wday + s->wday_offset) % 7);
+ s->nvram[DAY] = to_bcd(now.tm_mday);
+ s->nvram[MONTH] = to_bcd(now.tm_mon + 1);
+ s->nvram[YEAR] = to_bcd(now.tm_year % 100);
+
+ s->nvram[EXT_SECONDS] = s->nvram[SECONDS];
+ s->nvram[EXT_MINUTES] = s->nvram[MINUTES];
+ s->nvram[EXT_HOURS] = s->nvram[HOURS];
+ s->nvram[EXT_WEEKDAY] = s->nvram[WEEKDAY];
+ s->nvram[EXT_DAY] = s->nvram[DAY];
+ s->nvram[EXT_MONTH] = s->nvram[MONTH];
+ s->nvram[EXT_YEAR] = s->nvram[YEAR];
+
+ TRACE(s->parent_obj, "Update current time to %02d:%02d:%02d %d %d/%d/%d "
+ "(0x%02x%02x%02x%02x%02x%02x%02x)",
+ now.tm_hour, now.tm_min, now.tm_sec,
+ (now.tm_wday + s->wday_offset) % 7,
+ now.tm_mday, now.tm_mon, now.tm_year + 1900,
+ s->nvram[HOURS], s->nvram[MINUTES], s->nvram[SECONDS],
+ s->nvram[WEEKDAY],
+ s->nvram[DAY], s->nvram[MONTH], s->nvram[YEAR]);
+}
+
+/**
+ * Increment the internal register pointer, dealing with wrapping
+ * @param s the RTC to operate on
+ */
+static void inc_regptr(RX8900State *s)
+{
+ /* The register pointer wraps around after 0x1F
+ */
+ s->ptr = (s->ptr + 1) & (RX8900_NVRAM_SIZE - 1);
+ TRACE(s->parent_obj, "Operating on register 0x%02x", s->ptr);
+
+ if (s->ptr == 0x00) {
+ TRACE(s->parent_obj, "Register pointer has overflowed, wrapping to 0");
+ capture_current_time(s);
+ }
+}
+
+/**
+ * Receive an I2C Event
+ * @param i2c the i2c device instance
+ * @param event the event to handle
+ */
+static void rx8900_event(I2CSlave *i2c, enum i2c_event event)
+{
+ RX8900State *s = RX8900(i2c);
+
+ switch (event) {
+ case I2C_START_RECV:
+ /* In h/w, time capture happens on any START condition, not just a
+ * START_RECV. For the emulation, it doesn't actually matter,
+ * since a START_RECV has to occur before the data can be read.
+ */
+ capture_current_time(s);
+ break;
+ case I2C_START_SEND:
+ s->addr_byte = true;
+ break;
+ case I2C_FINISH:
+ if (s->weekday < 7) {
+ /* We defer the weekday calculation as it is handed to us before
+ * the date has been updated. If we calculate the weekday offset
+ * when it is passed to us, we will incorrectly determine it
+ * based on the current emulated date, rather than the date that
+ * has been written.
+ */
+ struct tm now;
+ qemu_get_timedate(&now, s->offset);
+
+ s->wday_offset = (s->weekday - now.tm_wday + 7) % 7;
+
+ TRACE(s->parent_obj, "Set weekday to %d (0x%02x), wday_offset=%d",
+ s->weekday, BIT(s->weekday), s->wday_offset);
+
+ s->weekday = 7;
+ }
+ break;
+
+ default:
+ break;
+ }
+}
+
+/**
+ * Perform an i2c receive action
+ * @param i2c the i2c device instance
+ * @return the value of the current register
+ * @post the internal register pointer is incremented
+ */
+static int rx8900_recv(I2CSlave *i2c)
+{
+ RX8900State *s = RX8900(i2c);
+ uint8_t res = s->nvram[s->ptr];
+ TRACE(s->parent_obj, "Read register 0x%x = 0x%x", s->ptr, res);
+ inc_regptr(s);
+ return res;
+}
+
+/**
+ * Validate the extension register and perform actions based on the bits
+ * @param s the RTC to operate on
+ * @param data the new data for the extension register
+ */
+static void update_extension_register(RX8900State *s, uint8_t data)
+{
+ if (data & EXT_MASK_TEST) {
+ error_report("WARNING: RX8900 - "
+ "Test bit is enabled but is forbidden by the manufacturer");
+ }
+
+ if ((data ^ s->nvram[EXTENSION_REGISTER]) &
+ (EXT_MASK_FSEL0 | EXT_MASK_FSEL1)) {
+ uint8_t fsel = (data & (EXT_MASK_FSEL0 | EXT_MASK_FSEL1))
+ >> EXT_REG_FSEL0;
+ /* FSELx has changed */
+ switch (fsel) {
+ case 0x01:
+ TRACE(s->parent_obj, "Setting fout to 1024Hz");
+ ptimer_set_limit(s->fout_timer, 32, 1);
+ break;
+ case 0x02:
+ TRACE(s->parent_obj, "Setting fout to 1Hz");
+ ptimer_set_limit(s->fout_timer, 32768, 1);
+ break;
+ default:
+ TRACE(s->parent_obj, "Setting fout to 32768Hz");
+ ptimer_set_limit(s->fout_timer, 1, 1);
+ break;
+ }
+ }
+
+ if ((data ^ s->nvram[EXTENSION_REGISTER]) &
+ (EXT_MASK_TSEL0 | EXT_MASK_TSEL1)) {
+ uint8_t tsel = (data & (EXT_MASK_TSEL0 | EXT_MASK_TSEL1))
+ >> EXT_REG_TSEL0;
+ /* TSELx has changed */
+ switch (tsel) {
+ case 0x00:
+ TRACE(s->parent_obj, "Setting countdown timer to 64 Hz");
+ ptimer_set_limit(s->countdown_timer, 4096 / 64, 1);
+ break;
+ case 0x01:
+ TRACE(s->parent_obj, "Setting countdown timer to 1 Hz");
+ ptimer_set_limit(s->countdown_timer, 4096, 1);
+ break;
+ case 0x02:
+ TRACE(s->parent_obj,
+ "Setting countdown timer to per minute updates");
+ ptimer_set_limit(s->countdown_timer, 4069 * 60, 1);
+ break;
+ case 0x03:
+ TRACE(s->parent_obj, "Setting countdown timer to 4096Hz");
+ ptimer_set_limit(s->countdown_timer, 1, 1);
+ break;
+ }
+ }
+
+ if (data & EXT_MASK_TE) {
+ enable_countdown_timer(s);
+ }
+
+ s->nvram[EXTENSION_REGISTER] = data;
+ s->nvram[EXT_EXTENSION_REGISTER] = data;
+
+}
+/**
+ * Validate the control register and perform actions based on the bits
+ * @param s the RTC to operate on
+ * @param data the new value for the control register
+ */
+
+static void update_control_register(RX8900State *s, uint8_t data)
+{
+ uint8_t diffmask = ~s->nvram[CONTROL_REGISTER] & data;
+
+ if (diffmask & CTRL_MASK_WP0) {
+ data &= ~CTRL_MASK_WP0;
+ error_report("WARNING: RX8900 - "
+ "Attempt to write to write protected bit %d in control register",
+ CTRL_REG_WP0);
+ }
+
+ if (diffmask & CTRL_MASK_WP1) {
+ data &= ~CTRL_MASK_WP1;
+ error_report("WARNING: RX8900 - "
+ "Attempt to write to write protected bit %d in control register",
+ CTRL_REG_WP1);
+ }
+
+ if (data & CTRL_MASK_RESET) {
+ data &= ~CTRL_MASK_RESET;
+ rx8900_reset(DEVICE(s));
+ }
+
+ if (diffmask & CTRL_MASK_UIE) {
+ /* Update interrupts were off and are now on */
+ struct tm now;
+
+ TRACE(s->parent_obj, "Enabling update timer");
+
+ qemu_get_timedate(&now, s->offset);
+
+ s->last_update_interrupt_minutes = now.tm_min;
+ s->last_interrupt_seconds = now.tm_sec;
+ enable_timer(s);
+ }
+
+ if (diffmask & CTRL_MASK_AIE) {
+ /* Alarm interrupts were off and are now on */
+ struct tm now;
+
+ TRACE(s->parent_obj, "Enabling alarm");
+
+ qemu_get_timedate(&now, s->offset);
+
+ s->last_interrupt_seconds = now.tm_sec;
+ enable_timer(s);
+ }
+
+ if (!(data & (CTRL_MASK_UIE | CTRL_MASK_AIE))) {
+ disable_timer(s);
+ }
+
+ if (data & CTRL_MASK_TIE) {
+ enable_countdown_timer(s);
+ }
+
+ s->nvram[CONTROL_REGISTER] = data;
+ s->nvram[EXT_CONTROL_REGISTER] = data;
+}
+
+/**
+ * Validate the flag register
+ * @param s the RTC to operate on
+ * @param data the new value for the flag register
+ */
+static void validate_flag_register(RX8900State *s, uint8_t *data)
+{
+ uint8_t diffmask = ~s->nvram[FLAG_REGISTER] & *data;
+
+ if (diffmask & FLAG_MASK_VDET) {
+ *data &= ~FLAG_MASK_VDET;
+ error_report("WARNING: RX8900 - "
+ "Only 0 can be written to VDET bit %d in the flag register",
+ FLAG_REG_VDET);
+ }
+
+ if (diffmask & FLAG_MASK_VLF) {
+ *data &= ~FLAG_MASK_VLF;
+ error_report("WARNING: RX8900 - "
+ "Only 0 can be written to VLF bit %d in the flag register",
+ FLAG_REG_VLF);
+ }
+
+ if (diffmask & FLAG_MASK_UNUSED_2) {
+ *data &= ~FLAG_MASK_UNUSED_2;
+ error_report("WARNING: RX8900 - "
+ "Only 0 can be written to unused bit %d in the flag register",
+ FLAG_REG_UNUSED_2);
+ }
+
+ if (diffmask & FLAG_MASK_UNUSED_6) {
+ *data &= ~FLAG_MASK_UNUSED_6;
+ error_report("WARNING: RX8900 - "
+ "Only 0 can be written to unused bit %d in the flag register",
+ FLAG_REG_UNUSED_6);
+ }
+
+ if (diffmask & FLAG_MASK_UNUSED_7) {
+ *data &= ~FLAG_MASK_UNUSED_7;
+ error_report("WARNING: RX8900 - "
+ "Only 0 can be written to unused bit %d in the flag register",
+ FLAG_REG_UNUSED_7);
+ }
+}
+
+/**
+ * Tick the per second timer (can be called more frequently as it early exits
+ * if the wall clock has not progressed)
+ * @param opaque the RTC to tick
+ */
+static void rx8900_timer_tick(void *opaque)
+{
+ RX8900State *s = (RX8900State *)opaque;
+ struct tm now;
+ bool fire_interrupt = false;
+
+ qemu_get_timedate(&now, s->offset);
+
+ if (now.tm_sec == s->last_interrupt_seconds) {
+ return;
+ }
+
+ s->last_interrupt_seconds = now.tm_sec;
+
+ TRACE(s->parent_obj, "Tick");
+
+ /* Update timer interrupt */
+ if (s->nvram[CONTROL_REGISTER] & CTRL_MASK_UIE) {
+ if ((s->nvram[EXTENSION_REGISTER] & EXT_MASK_USEL) &&
+ now.tm_min != s->last_update_interrupt_minutes) {
+ s->last_update_interrupt_minutes = now.tm_min;
+ s->nvram[FLAG_REGISTER] |= FLAG_MASK_UF;
+ fire_interrupt = true;
+ } else if (!(s->nvram[EXTENSION_REGISTER] & EXT_MASK_USEL)) {
+ /* per second update interrupt */
+ s->nvram[FLAG_REGISTER] |= FLAG_MASK_UF;
+ fire_interrupt = true;
+ }
+ }
+
+ /* Alarm interrupt */
+ if ((s->nvram[CONTROL_REGISTER] & CTRL_MASK_AIE) && now.tm_sec == 0) {
+ if (s->nvram[ALARM_MINUTE] == to_bcd(now.tm_min) &&
+ s->nvram[ALARM_HOUR] == to_bcd(now.tm_hour) &&
+ s->nvram[ALARM_WEEK_DAY] ==
+ ((s->nvram[EXTENSION_REGISTER] & EXT_MASK_WADA) ?
+ to_bcd(now.tm_mday) :
+ 0x01 << ((now.tm_wday + s->wday_offset) % 7)))
{
+ TRACE(s->parent_obj, "Triggering alarm");
+ s->nvram[FLAG_REGISTER] |= FLAG_MASK_AF;
+ fire_interrupt = true;
+ }
+ }
+
+ if (fire_interrupt) {
+ TRACE(s->parent_obj, "Pulsing interrupt");
+ qemu_irq_pulse(s->interrupt_pin);
+ }
+}
+
+/**
+ * Disable the per second timer
+ * @param s the RTC to operate on
+ */
+static void disable_timer(RX8900State *s)
+{
+ TRACE(s->parent_obj, "Disabling timer");
+ ptimer_stop(s->sec_timer);
+}
+
+/**
+ * Enable the per second timer
+ * @param s the RTC to operate on
+ */
+static void enable_timer(RX8900State *s)
+{
+ TRACE(s->parent_obj, "Enabling timer");
+ ptimer_run(s->sec_timer, 0);
+}
+
+/**
+ * Handle FOUT_ENABLE (FOE) line
+ * Enables/disables the FOUT line
+ * @param opaque the device instance
+ * @param n the IRQ number
+ * @param level true if the line has been raised
+ */
+static void rx8900_fout_enable_handler(void *opaque, int n, int level)
+{
+ RX8900State *s = RX8900(opaque);
+
+ if (level) {
+ TRACE(s->parent_obj, "Enabling fout");
+ ptimer_run(s->fout_timer, 0);
+ } else {
+ /* disable fout */
+ TRACE(s->parent_obj, "Disabling fout");
+ ptimer_stop(s->fout_timer);
+ }
+}
+
+/**
+ * Tick the FOUT timer
+ * @param opaque the device instance
+ */
+static void rx8900_fout_tick(void *opaque)
+{
+ RX8900State *s = (RX8900State *)opaque;
+
+ TRACE(s->parent_obj, "fout toggle");
+ s->fout = !s->fout;
+
+ if (s->fout) {
+ qemu_irq_raise(s->fout_pin);
+ } else {
+ qemu_irq_lower(s->fout_pin);
+ }
+}
+
+
+/**
+ * Disable the countdown timer
+ * @param s the RTC to operate on
+ */
+static void disable_countdown_timer(RX8900State *s)
+{
+ TRACE(s->parent_obj, "Disabling countdown timer");
+ ptimer_stop(s->countdown_timer);
+}
+
+/**
+ * Enable the per second timer
+ * @param s the RTC to operate on
+ */
+static void enable_countdown_timer(RX8900State *s)
+{
+ TRACE(s->parent_obj, "Enabling countdown timer");
+ ptimer_run(s->countdown_timer, 0);
+}
+
+/**
+ * Tick the countdown timer
+ * @param opaque the device instance
+ */
+static void rx8900_countdown_tick(void *opaque)
+{
+ RX8900State *s = (RX8900State *)opaque;
+
+ uint16_t count = s->nvram[TIMER_COUNTER_0] +
+ ((s->nvram[TIMER_COUNTER_1] & 0x0F) << 8);
+ TRACE(s->parent_obj, "countdown tick, count=%d", count);
+ count--;
+
+ s->nvram[TIMER_COUNTER_0] = (uint8_t)(count & 0x00ff);
+ s->nvram[TIMER_COUNTER_1] = (uint8_t)((count & 0x0f00) >> 8);
+
+ if (count == 0) {
+ TRACE(s->parent_obj, "Countdown has elapsed, pulsing interrupt");
+
+ disable_countdown_timer(s);
+
+ s->nvram[FLAG_REGISTER] |= FLAG_MASK_TF;
+ qemu_irq_pulse(s->interrupt_pin);
+ }
+}
+
+
+/**
+ * Receive a byte of data from i2c
+ * @param i2c the i2c device that is receiving data
+ * @param data the data that was received
+ */
+static int rx8900_send(I2CSlave *i2c, uint8_t data)
+{
+ RX8900State *s = RX8900(i2c);
+ struct tm now;
+
+ TRACE(s->parent_obj, "Received I2C data 0x%02x", data);
+
+ if (s->addr_byte) {
+ s->ptr = data & (RX8900_NVRAM_SIZE - 1);
+ TRACE(s->parent_obj, "Operating on register 0x%02x", s->ptr);
+ s->addr_byte = false;
+ return 0;
+ }
+
+ TRACE(s->parent_obj, "Set data 0x%02x=0x%02x", s->ptr, data);
+
+ qemu_get_timedate(&now, s->offset);
+ switch (s->ptr) {
+ case SECONDS:
+ case EXT_SECONDS:
+ now.tm_sec = from_bcd(data & 0x7f);
+ s->offset = qemu_timedate_diff(&now);
+ break;
+
+ case MINUTES:
+ case EXT_MINUTES:
+ now.tm_min = from_bcd(data & 0x7f);
+ s->offset = qemu_timedate_diff(&now);
+ break;
+
+ case HOURS:
+ case EXT_HOURS:
+ now.tm_hour = from_bcd(data & 0x3f);
+ s->offset = qemu_timedate_diff(&now);
+ break;
+
+ case WEEKDAY:
+ case EXT_WEEKDAY: {
+ int user_wday = ctz32(data);
+ /* The day field is supposed to contain a value in
+ * the range 0-6. Otherwise behavior is undefined.
+ */
+ switch (data) {
+ case 0x01:
+ case 0x02:
+ case 0x04:
+ case 0x08:
+ case 0x10:
+ case 0x20:
+ case 0x40:
+ break;
+ default:
+ error_report("WARNING: RX8900 - weekday data '%x' is out of range,"
+ " undefined behavior will result", data);
+ break;
+ }
+ s->weekday = user_wday;
+ break;
+ }
+
+ case DAY:
+ case EXT_DAY:
+ now.tm_mday = from_bcd(data & 0x3f);
+ s->offset = qemu_timedate_diff(&now);
+ break;
+
+ case MONTH:
+ case EXT_MONTH:
+ now.tm_mon = from_bcd(data & 0x1f) - 1;
+ s->offset = qemu_timedate_diff(&now);
+ break;
+
+ case YEAR:
+ case EXT_YEAR:
+ now.tm_year = from_bcd(data) + 100;
+ s->offset = qemu_timedate_diff(&now);
+ break;
+
+ case EXTENSION_REGISTER:
+ case EXT_EXTENSION_REGISTER:
+ update_extension_register(s, data);
+ break;
+
+ case FLAG_REGISTER:
+ case EXT_FLAG_REGISTER:
+ validate_flag_register(s, &data);
+
+ s->nvram[FLAG_REGISTER] = data;
+ s->nvram[EXT_FLAG_REGISTER] = data;
+ break;
+
+ case CONTROL_REGISTER:
+ case EXT_CONTROL_REGISTER:
+ update_control_register(s, data);
+ break;
+
+ default:
+ s->nvram[s->ptr] = data;
+ }
+
+ inc_regptr(s);
+ return 0;
+}
+
+/**
+ * Get the device temperature in Celcius as a property
+ * @param obj the device
+ * @param v
+ * @param name the property name
+ * @param opaque
+ * @param errp an error object to populate on failure
+ */
+static void rx8900_get_temperature(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ RX8900State *s = RX8900(obj);
+ double value = (s->nvram[TEMPERATURE] * 2.0f - 187.1f) / 3.218f;
+
+ TRACE(s->parent_obj, "Read temperature property, 0x%x = %f°C",
+ s->nvram[TEMPERATURE], value);
+
+ visit_type_number(v, name, &value, errp);
+}
+
+/**
+ * Set the device temperature in Celcius as a property
+ * @param obj the device
+ * @param v
+ * @param name the property name
+ * @param opaque
+ * @param errp an error object to populate on failure
+ */
+static void rx8900_set_temperature(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ RX8900State *s = RX8900(obj);
+ Error *local_err = NULL;
+ double temp; /* degrees Celcius */
+ visit_type_number(v, name, &temp, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+ if (temp >= 100 || temp < -58) {
+ error_setg(errp, "value %f°C is out of range", temp);
+ return;
+ }
+
+ s->nvram[TEMPERATURE] = (uint8_t) ((temp * 3.218f + 187.19f) / 2);
+
+ TRACE(s->parent_obj, "Set temperature property, 0x%x = %f°C",
+ s->nvram[TEMPERATURE], temp);
+}
+
+
+/**
+ * Initialize the device
+ * @param i2c the i2c device instance
+ */
+static int rx8900_init(I2CSlave *i2c)
+{
+ TRACE(*i2c, "Initialized");
+
+ return 0;
+}
+
+/**
+ * Configure device properties
+ * @param obj the device
+ */
+static void rx8900_initfn(Object *obj)
+{
+ object_property_add(obj, "temperature", "number",
+ rx8900_get_temperature,
+ rx8900_set_temperature, NULL, NULL, NULL);
+}
+
+/**
+ * Reset the device
+ * @param dev the RX8900 device to reset
+ */
+static void rx8900_reset(DeviceState *dev)
+{
+ RX8900State *s = RX8900(dev);
+
+ TRACE(s->parent_obj, "Reset");
+
+ /* The clock is running and synchronized with the host */
+ s->offset = 0;
+ s->weekday = 7; /* Set to an invalid value */
+
+ /* Temperature formulation from the datasheet
+ * ( TEMP[ 7:0 ] * 2 - 187.19) / 3.218
+ *
+ * Set the initial state to 25 degrees Celcius
+ */
+ s->nvram[TEMPERATURE] = 135; /* (25 * 3.218 + 187.19) / 2 */
+
+ s->nvram[EXTENSION_REGISTER] = EXT_MASK_TSEL1;
+ s->nvram[CONTROL_REGISTER] = CTRL_MASK_CSEL0;
+ s->nvram[FLAG_REGISTER] = FLAG_MASK_VLF | FLAG_MASK_VDET;
+
+ s->ptr = 0;
+ TRACE(s->parent_obj, "Operating on register 0x%02x", s->ptr);
+
+ s->addr_byte = false;
+}
+
+/**
+ * Realize an RX8900 device instance
+ * Set up timers
+ * Configure GPIO lines
+ * @param dev the device instance to realize
+ * @param errp an error object to populate on error
+ */
+static void rx8900_realize(DeviceState *dev, Error **errp)
+{
+ RX8900State *s = RX8900(dev);
+ I2CSlave *i2c = I2C_SLAVE(dev);
+ QEMUBH *bh;
+ char name[64];
+
+ s->fout = false;
+
+ memset(s->nvram, 0, RX8900_NVRAM_SIZE);
+
+ bh = qemu_bh_new(rx8900_timer_tick, s);
+ s->sec_timer = ptimer_init(bh, PTIMER_POLICY_DEFAULT);
+ /* we trigger the timer at 10Hz and check for rollover, as the qemu
+ * clock does not advance in realtime in the test environment,
+ * leading to unstable test results
+ */
+ ptimer_set_freq(s->sec_timer, 10);
+ ptimer_set_limit(s->sec_timer, 1, 1);
+
+ bh = qemu_bh_new(rx8900_fout_tick, s);
+ s->fout_timer = ptimer_init(bh, PTIMER_POLICY_DEFAULT);
+ /* frequency doubled to generate 50% duty cycle square wave */
+ ptimer_set_freq(s->fout_timer, 32768 * 2);
+ ptimer_set_limit(s->fout_timer, 1, 1);
+
+ bh = qemu_bh_new(rx8900_countdown_tick, s);
+ s->countdown_timer = ptimer_init(bh, PTIMER_POLICY_DEFAULT);
+ ptimer_set_freq(s->countdown_timer, 4096);
+ ptimer_set_limit(s->countdown_timer, 4096, 1);
+
+
+ snprintf(name, sizeof(name), "rx8900-interrupt-out");
+ qdev_init_gpio_out_named(&i2c->qdev, &s->interrupt_pin, name, 1);
+ TRACE(s->parent_obj, "Interrupt pin is '%s'", name);
+
+ snprintf(name, sizeof(name), "rx8900-fout-enable");
+ qdev_init_gpio_in_named(&i2c->qdev, rx8900_fout_enable_handler, name, 1);
+ TRACE(s->parent_obj, "Fout-enable pin is '%s'", name);
+
+ snprintf(name, sizeof(name), "rx8900-fout");
+ qdev_init_gpio_out_named(&i2c->qdev, &s->fout_pin, name, 1);
+ TRACE(s->parent_obj, "Fout pin is '%s'", name);
+}
+
+/**
+ * Set up the device callbacks
+ * @param klass the device class
+ * @param data
+ */
+static void rx8900_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
+
+ k->init = rx8900_init;
+ k->event = rx8900_event;
+ k->recv = rx8900_recv;
+ k->send = rx8900_send;
+ dc->realize = rx8900_realize;
+ dc->reset = rx8900_reset;
+ dc->vmsd = &vmstate_rx8900;
+}
+
+static const TypeInfo rx8900_info = {
+ .name = TYPE_RX8900,
+ .parent = TYPE_I2C_SLAVE,
+ .instance_size = sizeof(RX8900State),
+ .instance_init = rx8900_initfn,
+ .class_init = rx8900_class_init,
+};
+
+/**
+ * Register the device with QEMU
+ */
+static void rx8900_register_types(void)
+{
+ log = getenv("RX8900_TRACE") != NULL;
+ type_register_static(&rx8900_info);
+}
+
+type_init(rx8900_register_types)
diff --git a/hw/timer/rx8900_regs.h b/hw/timer/rx8900_regs.h
new file mode 100644
index 0000000..5261c76
--- /dev/null
+++ b/hw/timer/rx8900_regs.h
@@ -0,0 +1,125 @@
+/*
+ * Epson RX8900SA/CE Realtime Clock Module
+ *
+ * Copyright (c) 2016 IBM Corporation
+ * Authors:
+ * Alastair D'Silva <address@hidden>
+ *
+ * This code is licensed under the GPL version 2 or later. See
+ * the COPYING file in the top-level directory.
+ *
+ * Datasheet available at:
+ * https://support.epson.biz/td/api/doc_check.php?dl=app_RX8900CE&lang=en
+ *
+ */
+
+#ifndef RX8900_REGS_H
+#define RX8900_REGS_H
+
+#include "qemu/bitops.h"
+
+#define RX8900_NVRAM_SIZE 0x20
+
+typedef enum RX8900Addresses {
+ SECONDS = 0x00,
+ MINUTES = 0x01,
+ HOURS = 0x02,
+ WEEKDAY = 0x03,
+ DAY = 0x04,
+ MONTH = 0x05,
+ YEAR = 0x06,
+ RAM = 0x07,
+ ALARM_MINUTE = 0x08,
+ ALARM_HOUR = 0x09,
+ ALARM_WEEK_DAY = 0x0A,
+ TIMER_COUNTER_0 = 0x0B,
+ TIMER_COUNTER_1 = 0x0C,
+ EXTENSION_REGISTER = 0x0D,
+ FLAG_REGISTER = 0X0E,
+ CONTROL_REGISTER = 0X0F,
+ EXT_SECONDS = 0x010, /* Alias of SECONDS */
+ EXT_MINUTES = 0x11, /* Alias of MINUTES */
+ EXT_HOURS = 0x12, /* Alias of HOURS */
+ EXT_WEEKDAY = 0x13, /* Alias of WEEKDAY */
+ EXT_DAY = 0x14, /* Alias of DAY */
+ EXT_MONTH = 0x15, /* Alias of MONTH */
+ EXT_YEAR = 0x16, /* Alias of YEAR */
+ TEMPERATURE = 0x17,
+ BACKUP_FUNCTION = 0x18,
+ NO_USE_1 = 0x19,
+ NO_USE_2 = 0x1A,
+ EXT_TIMER_COUNTER_0 = 0x1B, /* Alias of TIMER_COUNTER_0 */
+ EXT_TIMER_COUNTER_1 = 0x1C, /* Alias of TIMER_COUNTER_1 */
+ EXT_EXTENSION_REGISTER = 0x1D, /* Alias of EXTENSION_REGISTER */
+ EXT_FLAG_REGISTER = 0X1E, /* Alias of FLAG_REGISTER */
+ EXT_CONTROL_REGISTER = 0X1F /* Alias of CONTROL_REGISTER */
+} RX8900Addresses;
+
+typedef enum ExtRegBits {
+ EXT_REG_TSEL0 = 0,
+ EXT_REG_TSEL1 = 1,
+ EXT_REG_FSEL0 = 2,
+ EXT_REG_FSEL1 = 3,
+ EXT_REG_TE = 4,
+ EXT_REG_USEL = 5,
+ EXT_REG_WADA = 6,
+ EXT_REG_TEST = 7
+} ExtRegBits;
+
+typedef enum ExtRegMasks {
+ EXT_MASK_TSEL0 = BIT(0),
+ EXT_MASK_TSEL1 = BIT(1),
+ EXT_MASK_FSEL0 = BIT(2),
+ EXT_MASK_FSEL1 = BIT(3),
+ EXT_MASK_TE = BIT(4),
+ EXT_MASK_USEL = BIT(5),
+ EXT_MASK_WADA = BIT(6),
+ EXT_MASK_TEST = BIT(7)
+} ExtRegMasks;
+
+typedef enum CtrlRegBits {
+ CTRL_REG_RESET = 0,
+ CTRL_REG_WP0 = 1,
+ CTRL_REG_WP1 = 2,
+ CTRL_REG_AIE = 3,
+ CTRL_REG_TIE = 4,
+ CTRL_REG_UIE = 5,
+ CTRL_REG_CSEL0 = 6,
+ CTRL_REG_CSEL1 = 7
+} CtrlRegBits;
+
+typedef enum CtrlRegMask {
+ CTRL_MASK_RESET = BIT(0),
+ CTRL_MASK_WP0 = BIT(1),
+ CTRL_MASK_WP1 = BIT(2),
+ CTRL_MASK_AIE = BIT(3),
+ CTRL_MASK_TIE = BIT(4),
+ CTRL_MASK_UIE = BIT(5),
+ CTRL_MASK_CSEL0 = BIT(6),
+ CTRL_MASK_CSEL1 = BIT(7)
+} CtrlRegMask;
+
+typedef enum FlagRegBits {
+ FLAG_REG_VDET = 0,
+ FLAG_REG_VLF = 1,
+ FLAG_REG_UNUSED_2 = 2,
+ FLAG_REG_AF = 3,
+ FLAG_REG_TF = 4,
+ FLAG_REG_UF = 5,
+ FLAG_REG_UNUSED_6 = 6,
+ FLAG_REG_UNUSED_7 = 7
+} FlagRegBits;
+
+#define RX8900_INTERRUPT_SOURCES 6
+typedef enum FlagRegMask {
+ FLAG_MASK_VDET = BIT(0),
+ FLAG_MASK_VLF = BIT(1),
+ FLAG_MASK_UNUSED_2 = BIT(2),
+ FLAG_MASK_AF = BIT(3),
+ FLAG_MASK_TF = BIT(4),
+ FLAG_MASK_UF = BIT(5),
+ FLAG_MASK_UNUSED_6 = BIT(6),
+ FLAG_MASK_UNUSED_7 = BIT(7)
+} FlagRegMask;
+
+#endif
diff --git a/tests/Makefile.include b/tests/Makefile.include
index e98d3b6..e52e355 100644
--- a/tests/Makefile.include
+++ b/tests/Makefile.include
@@ -300,6 +300,7 @@ check-qtest-sparc64-y = tests/endianness-test$(EXESUF)
check-qtest-arm-y = tests/tmp105-test$(EXESUF)
check-qtest-arm-y += tests/ds1338-test$(EXESUF)
+check-qtest-arm-y += tests/rx8900-test$(EXESUF)
check-qtest-arm-y += tests/m25p80-test$(EXESUF)
gcov-files-arm-y += hw/misc/tmp105.c
check-qtest-arm-y += tests/virtio-blk-test$(EXESUF)
@@ -637,6 +638,7 @@ tests/bios-tables-test$(EXESUF): tests/bios-tables-test.o \
tests/pxe-test$(EXESUF): tests/pxe-test.o tests/boot-sector.o $(libqos-obj-y)
tests/tmp105-test$(EXESUF): tests/tmp105-test.o $(libqos-omap-obj-y)
tests/ds1338-test$(EXESUF): tests/ds1338-test.o $(libqos-imx-obj-y)
+tests/rx8900-test$(EXESUF): tests/rx8900-test.o $(libqos-imx-obj-y)
tests/m25p80-test$(EXESUF): tests/m25p80-test.o
tests/i440fx-test$(EXESUF): tests/i440fx-test.o $(libqos-pc-obj-y)
tests/q35-test$(EXESUF): tests/q35-test.o $(libqos-pc-obj-y)
diff --git a/tests/rx8900-test.c b/tests/rx8900-test.c
new file mode 100644
index 0000000..a56426b
--- /dev/null
+++ b/tests/rx8900-test.c
@@ -0,0 +1,800 @@
+/*
+ * QTest testcase for the Enpes RX8900SA/CE RTC
+ *
+ * Copyright (c) 2016 IBM Corporation
+ * Authors:
+ * Alastair D'Silva <address@hidden>
+ *
+ * This code is licensed under the GPL version 2 or later. See
+ * the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "hw/timer/rx8900_regs.h"
+#include "libqtest.h"
+#include "libqos/i2c.h"
+#include "qemu/timer.h"
+
+#define IMX25_I2C_0_BASE 0x43F80000
+#define RX8900_TEST_ID "rx8900-test"
+#define RX8900_ADDR 0x32
+#define RX8900_INTERRUPT_OUT "rx8900-interrupt-out"
+#define RX8900_FOUT_ENABLE "rx8900-fout-enable"
+#define RX8900_FOUT "rx8900-fout"
+
+static I2CAdapter *i2c;
+static uint8_t addr;
+
+static inline uint8_t bcd2bin(uint8_t x)
+{
+ return (x & 0x0f) + (x >> 4) * 10;
+}
+
+static inline uint8_t bin2bcd(uint8_t x)
+{
+ return (x / 10 << 4) | (x % 10);
+}
+
+static void qmp_rx8900_set_temperature(const char *id, double value)
+{
+ QDict *response;
+
+ response = qmp("{ 'execute': 'qom-set', 'arguments': { 'path': %s, "
+ "'property': 'temperature', 'value': %f } }", id, value);
+ g_assert(qdict_haskey(response, "return"));
+ QDECREF(response);
+}
+
+/**
+ * Read an RX8900 register
+ * @param reg the address of the register
+ * @return the value of the register
+ */
+static uint8_t read_register(RX8900Addresses reg)
+{
+ uint8_t val;
+ uint8_t reg_address = (uint8_t)reg;
+
+ i2c_send(i2c, addr, ®_address, 1);
+ i2c_recv(i2c, addr, &val, 1);
+
+ return val;
+}
+
+/**
+ * Write to an RX8900 register
+ * @param reg the address of the register
+ * @param val the value to write
+ */
+static uint8_t write_register(RX8900Addresses reg, uint8_t val)
+{
+ uint8_t buf[2];
+
+ buf[0] = reg;
+ buf[1] = val;
+
+ i2c_send(i2c, addr, buf, 2);
+
+ return val;
+}
+
+/**
+ * Set bits in a register
+ * @param reg the address of the register
+ * @param mask a mask of the bits to set
+ */
+static void set_bits_in_register(RX8900Addresses reg, uint8_t mask)
+{
+ uint8_t value = read_register(reg);
+ value |= mask;
+ write_register(reg, value);
+}
+
+/**
+ * Clear bits in a register
+ * @param reg the address of the register
+ * @param mask a mask of the bits to set
+ */
+static void clear_bits_in_register(RX8900Addresses reg, uint8_t mask)
+{
+ uint8_t value = read_register(reg);
+ value &= ~mask;
+ write_register(reg, value);
+}
+
+/**
+ * Read a number of sequential RX8900 registers
+ * @param reg the address of the first register
+ * @param buf (out) an output buffer to stash the register values
+ * @param count the number of registers to read
+ */
+static void read_registers(RX8900Addresses reg, uint8_t *buf, uint8_t count)
+{
+ uint8_t reg_address = (uint8_t)reg;
+
+ i2c_send(i2c, addr, ®_address, 1);
+ i2c_recv(i2c, addr, buf, count);
+}
+
+/**
+ * Write to a sequential number of RX8900 registers
+ * @param reg the address of the first register
+ * @param buffer a buffer of values to write
+ * @param count the sumber of registers to write
+ */
+static void write_registers(RX8900Addresses reg, uint8_t *buffer, uint8_t
count)
+{
+ uint8_t buf[RX8900_NVRAM_SIZE + 1];
+
+ buf[0] = (uint8_t)reg;
+ memcpy(buf + 1, buffer, count);
+
+ i2c_send(i2c, addr, buf, count + 1);
+}
+
+/**
+ * Set the time on the RX8900
+ * @param secs the seconds to set
+ * @param mins the minutes to set
+ * @param hours the hours to set
+ * @param weekday the day of the week to set (0 = Sunday)
+ * @param day the day of the month to set
+ * @param month the month to set
+ * @param year the year to set
+ */
+static void set_time(uint8_t secs, uint8_t mins, uint8_t hours,
+ uint8_t weekday, uint8_t day, uint8_t month, uint8_t year)
+{
+ uint8_t buf[7];
+
+ buf[0] = bin2bcd(secs);
+ buf[1] = bin2bcd(mins);
+ buf[2] = bin2bcd(hours);
+ buf[3] = BIT(weekday);
+ buf[4] = bin2bcd(day);
+ buf[5] = bin2bcd(month);
+ buf[6] = bin2bcd(year);
+
+ write_registers(SECONDS, buf, 7);
+}
+
+
+/**
+ * Check basic communication
+ */
+static void send_and_receive(void)
+{
+ uint8_t buf[7];
+ time_t now = time(NULL);
+ struct tm *tm_ptr;
+
+ /* retrieve the date */
+ read_registers(SECONDS, buf, 7);
+
+ tm_ptr = gmtime(&now);
+
+ /* check retrieved time against local time */
+ g_assert_cmpuint(bcd2bin(buf[0]), == , tm_ptr->tm_sec);
+ g_assert_cmpuint(bcd2bin(buf[1]), == , tm_ptr->tm_min);
+ g_assert_cmpuint(bcd2bin(buf[2]), == , tm_ptr->tm_hour);
+ g_assert_cmpuint(bcd2bin(buf[4]), == , tm_ptr->tm_mday);
+ g_assert_cmpuint(bcd2bin(buf[5]), == , 1 + tm_ptr->tm_mon);
+ g_assert_cmpuint(2000 + bcd2bin(buf[6]), == , 1900 + tm_ptr->tm_year);
+}
+
+/**
+ * Check that the temperature can be altered via properties
+ */
+static void check_temperature(void)
+{
+ /* Check the initial temperature is 25C */
+ uint8_t temperature;
+
+ temperature = read_register(TEMPERATURE);
+ g_assert_cmpuint(temperature, == , 135);
+
+ /* Set the temperature to 40C and check the temperature again */
+ qmp_rx8900_set_temperature(RX8900_TEST_ID, 40.0f);
+ temperature = read_register(TEMPERATURE);
+ g_assert_cmpuint(temperature, == , 157);
+}
+
+/**
+ * Check that the time rolls over correctly
+ */
+static void check_rollover(void)
+{
+ uint8_t buf[7];
+
+
+ set_time(59, 59, 23, 1, 29, 2, 16);
+
+ /* Wait for the clock to rollover */
+ sleep(2);
+
+ memset(buf, 0, sizeof(buf));
+
+ /* Check that the clock rolled over */
+ /* Read from registers starting at 0x00 */
+ buf[0] = 0x00;
+
+ read_registers(SECONDS, buf, 7);
+
+ /* Ignore seconds as there may be some noise,
+ * we expect 00:00:xx Tuesday 1/3/2016
+ */
+ g_assert_cmpuint(bcd2bin(buf[1]), == , 0);
+ g_assert_cmpuint(bcd2bin(buf[2]), == , 0);
+ g_assert_cmpuint(bcd2bin(buf[3]), == , 0x04);
+ g_assert_cmpuint(bcd2bin(buf[4]), == , 1);
+ g_assert_cmpuint(bcd2bin(buf[5]), == , 3);
+ g_assert_cmpuint(bcd2bin(buf[6]), == , 16);
+}
+
+uint32_t interrupt_counts[RX8900_INTERRUPT_SOURCES];
+
+/**
+ * Reset the interrupt counts
+ */
+static void count_reset(void)
+{
+ for (int source = 0; source < RX8900_INTERRUPT_SOURCES; source++) {
+ interrupt_counts[source] = 0;
+ }
+}
+
+/**
+ * Handle an RX8900 interrupt (update the counts for that interrupt type)
+ */
+static void handle_interrupt(void *opaque, const char *name, int irq,
+ bool level)
+{
+ if (!level) {
+ return;
+ }
+
+ uint8_t flags = read_register(FLAG_REGISTER);
+
+ for (int flag = 0; flag < 8; flag++) {
+ if (flags & BIT(flag)) {
+ interrupt_counts[flag]++;
+ }
+ }
+
+ write_register(FLAG_REGISTER, 0x00);
+}
+
+uint32_t fout_counts;
+
+/**
+ * Handle an Fout state change
+ */
+static void handle_fout(void *opaque, const char *name, int irq, bool level)
+{
+ if (!level) {
+ return;
+ }
+
+ fout_counts++;
+}
+
+/**
+ * Reset the fout count
+ */
+static void fout_count_reset(void)
+{
+ fout_counts = 0;
+}
+
+
+/**
+ * Sleep for some real time while counting interrupts
+ * @param delay the delay in microseconds
+ * @param loop the loop time in microseconds
+ */
+static void wait_for(uint64_t delay, uint64_t loop)
+{
+ struct timeval end, now;
+
+ gettimeofday(&end, NULL);
+ delay += end.tv_usec;
+ end.tv_sec += delay / 1000000;
+ end.tv_usec = delay % 1000000;
+
+ while (gettimeofday(&now, NULL),
+ now.tv_sec < end.tv_sec || now.tv_usec < end.tv_usec) {
+ clock_step(loop * 1000);
+ usleep(loop);
+ }
+}
+
+/**
+ * Sleep for some emulated time while counting interrupts
+ * @param delay the delay in nanoseconds
+ * @param loop the loop time in nanoseconds
+ */
+static void wait_cycles(uint64_t delay, uint64_t loop)
+{
+ uint64_t counter;
+
+ for (counter = 0; counter < delay; counter += loop) {
+ clock_step(loop);
+ }
+}
+
+
+/**
+ * Check that when the update timer interrupt is disabled, that no interrupts
+ * occur
+ */
+static void check_update_interrupt_disabled(void)
+{
+ /* Disable the update interrupt */
+ clear_bits_in_register(CONTROL_REGISTER, CTRL_MASK_UIE);
+
+ /* Wait for the clock to rollover, this will cover both seconds & minutes
+ */
+ set_time(59, 59, 23, 1, 29, 2, 16);
+
+ count_reset();
+ wait_for(2 * 1000000, 1000);
+
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_UF], ==, 0);
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_AF], ==, 0);
+}
+
+
+/**
+ * Check that when the update timer interrupt is enabled and configured for
+ * per second updates, that we get the appropriate number of interrupts
+ */
+static void check_update_interrupt_seconds(void)
+{
+ set_time(59, 59, 23, 1, 29, 2, 16);
+
+ /* Enable the update interrupt for per second updates */
+ clear_bits_in_register(EXTENSION_REGISTER, EXT_MASK_USEL);
+ set_bits_in_register(CONTROL_REGISTER, CTRL_MASK_UIE);
+
+ count_reset();
+ wait_for(5.1f * 1000000ULL, 1000);
+
+ /* Disable the update interrupt */
+ clear_bits_in_register(CONTROL_REGISTER, CTRL_MASK_UIE);
+
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_UF], ==, 5);
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_AF], ==, 0);
+}
+
+/**
+ * Check that when the update timer interrupt is enabled and configured for
+ * per minute updates, that we get the appropriate number of interrupts
+ */
+static void check_update_interrupt_minutes(void)
+{
+ set_time(59, 59, 23, 1, 29, 2, 16);
+
+ /* Enable the update interrupt for per minute updates */
+ set_bits_in_register(EXTENSION_REGISTER, EXT_MASK_USEL);
+ set_bits_in_register(CONTROL_REGISTER, CTRL_MASK_UIE);
+
+ count_reset();
+ wait_for(5 * 1000000ULL, 1000);
+
+ /* Disable the update interrupt */
+ clear_bits_in_register(CONTROL_REGISTER, CTRL_MASK_UIE);
+
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_UF], ==, 1);
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_AF], ==, 0);
+}
+
+
+/**
+ * Check that when the alarm timer interrupt is disabled, that no interrupts
+ * occur
+ */
+static void check_alarm_interrupt_disabled(void)
+{
+ /* Disable the alarm interrupt */
+ clear_bits_in_register(CONTROL_REGISTER, CTRL_MASK_AIE);
+
+ /* Set an alarm for midnight */
+ uint8_t buf[3];
+
+ buf[0] = bin2bcd(0); /* minutes */
+ buf[1] = bin2bcd(0); /* hours */
+ buf[2] = bin2bcd(1); /* day */
+
+ write_registers(ALARM_MINUTE, buf, 3);
+
+ /* Wait for the clock to rollover */
+ set_time(59, 59, 23, 1, 29, 2, 16);
+
+ count_reset();
+ wait_for(2 * 1000000, 1000);
+
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_UF], ==, 0);
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_AF], ==, 0);
+}
+
+/**
+ * Check that when the alarm timer interrupt is enabled, that an interrupt
+ * occurs
+ */
+static void check_alarm_interrupt_day_of_month(void)
+{
+
+ /* Set an alarm for midnight */
+ uint8_t buf[3];
+
+ buf[0] = bin2bcd(0); /* minutes */
+ buf[1] = bin2bcd(0); /* hours */
+ buf[2] = bin2bcd(1); /* day */
+
+ write_registers(ALARM_MINUTE, buf, 3);
+
+ /* Set alarm to day of month mode */
+ set_bits_in_register(EXTENSION_REGISTER, EXT_MASK_WADA);
+
+ /* Enable the alarm interrupt */
+ set_bits_in_register(CONTROL_REGISTER, CTRL_MASK_AIE);
+
+ /* Wait for the clock to rollover */
+ set_time(59, 59, 23, 1, 29, 2, 16);
+
+ count_reset();
+ wait_for(2 * 1000000, 1000);
+
+ /* Disable the alarm interrupt */
+ clear_bits_in_register(CONTROL_REGISTER, CTRL_MASK_AIE);
+
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_UF], ==, 0);
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_AF], ==, 1);
+}
+
+/**
+ * Check that when the alarm timer interrupt is enabled, that an interrupt
+ * does not occur
+ */
+static void check_alarm_interrupt_day_of_month_negative(void)
+{
+
+ /* Set an alarm for midnight */
+ uint8_t buf[3];
+
+ buf[0] = bin2bcd(0); /* minutes */
+ buf[1] = bin2bcd(0); /* hours */
+ buf[2] = bin2bcd(2); /* day */
+
+ write_registers(ALARM_MINUTE, buf, 3);
+
+ /* Set alarm to day of month mode */
+ set_bits_in_register(EXTENSION_REGISTER, EXT_MASK_WADA);
+
+ /* Enable the alarm interrupt */
+ set_bits_in_register(CONTROL_REGISTER, CTRL_MASK_AIE);
+
+ /* Wait for the clock to rollover */
+ set_time(59, 59, 23, 1, 29, 2, 16);
+
+ count_reset();
+ wait_for(2 * 1000000, 1000);
+
+ /* Disable the alarm interrupt */
+ clear_bits_in_register(CONTROL_REGISTER, CTRL_MASK_AIE);
+
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_UF], ==, 0);
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_AF], ==, 0);
+}
+
+/**
+ * Check that when the alarm timer interrupt is enabled, that an interrupt
+ * occurs
+ */
+static void check_alarm_interrupt_day_of_week(void)
+{
+
+ /* Set an alarm for midnight */
+ uint8_t buf[3];
+
+ buf[0] = bin2bcd(0); /* minutes */
+ buf[1] = bin2bcd(0); /* hours */
+ buf[2] = 0x01 << 2; /* day */
+
+ write_registers(ALARM_MINUTE, buf, 3);
+
+ /* Set alarm to day of week mode */
+ clear_bits_in_register(EXTENSION_REGISTER, EXT_MASK_WADA);
+
+ /* Enable the alarm interrupt */
+ set_bits_in_register(CONTROL_REGISTER, CTRL_MASK_AIE);
+
+ /* Wait for the clock to rollover */
+ set_time(59, 59, 23, 1, 29, 2, 16);
+
+ count_reset();
+ wait_for(2 * 1000000, 1000);
+
+ /* Disable the alarm interrupt */
+ clear_bits_in_register(CONTROL_REGISTER, CTRL_MASK_AIE);
+
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_UF], ==, 0);
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_AF], ==, 1);
+}
+
+/**
+ * Check that when the alarm timer interrupt is enabled, that an interrupt
+ * does not occur
+ */
+static void check_alarm_interrupt_day_of_week_negative(void)
+{
+
+ /* Set an alarm for midnight */
+ uint8_t buf[3];
+
+ buf[0] = bin2bcd(0); /* minutes */
+ buf[1] = bin2bcd(0); /* hours */
+ buf[2] = 0x01 << 2; /* day */
+
+ write_registers(ALARM_MINUTE, buf, 3);
+
+ /* Set alarm to day of week mode */
+ clear_bits_in_register(EXTENSION_REGISTER, EXT_MASK_WADA);
+
+ /* Enable the alarm interrupt */
+ set_bits_in_register(CONTROL_REGISTER, CTRL_MASK_AIE);
+
+ /* Wait for the clock to rollover */
+ set_time(59, 59, 23, 3, 29, 2, 16);
+
+ count_reset();
+ wait_for(2 * 1000000, 1000);
+
+ /* Disable the alarm interrupt */
+ clear_bits_in_register(CONTROL_REGISTER, CTRL_MASK_AIE);
+
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_UF], ==, 0);
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_AF], ==, 0);
+}
+
+/**
+ * Check that the reset function
+ */
+static void check_reset(void)
+{
+ set_bits_in_register(FLAG_REGISTER, FLAG_MASK_UF);
+ set_bits_in_register(CONTROL_REGISTER, CTRL_MASK_RESET);
+
+ g_assert_cmpuint(read_register(FLAG_REGISTER), ==,
+ FLAG_MASK_VLF | FLAG_MASK_VDET);
+}
+
+/**
+ * Check that Fout operates at 1Hz
+ */
+static void check_fout_1hz(void)
+{
+ uint8_t ext_reg = read_register(EXTENSION_REGISTER);
+ ext_reg |= EXT_MASK_FSEL1;
+ ext_reg &= ~EXT_MASK_FSEL0;
+ write_register(EXTENSION_REGISTER, ext_reg);
+
+ /* Enable Fout */
+ irq_set(RX8900_TEST_ID, RX8900_FOUT_ENABLE, 0, true);
+
+ fout_count_reset();
+ wait_cycles(2 * 1000000000ULL, 1000000);
+
+ /* disable Fout */
+ irq_set(RX8900_TEST_ID, RX8900_FOUT_ENABLE, 0, false);
+
+ g_assert_cmpuint(fout_counts, ==, 2);
+}
+
+/**
+ * Check that Fout operates at 1024Hz
+ */
+static void check_fout_1024hz(void)
+{
+ uint8_t ext_reg = read_register(EXTENSION_REGISTER);
+ ext_reg |= EXT_MASK_FSEL0;
+ ext_reg &= ~EXT_MASK_FSEL1;
+ write_register(EXTENSION_REGISTER, ext_reg);
+
+ /* Enable Fout */
+ irq_set(RX8900_TEST_ID, RX8900_FOUT_ENABLE, 0, true);
+
+ fout_count_reset();
+ wait_cycles(2 * 1000000000ULL, 100000);
+
+ /* disable Fout */
+ irq_set(RX8900_TEST_ID, RX8900_FOUT_ENABLE, 0, false);
+
+ g_assert_cmpuint(fout_counts, ==, 1024 * 2);
+}
+
+/**
+ * Check that Fout operates at 32768Hz
+ */
+static void check_fout_32768hz(void)
+{
+ uint8_t ext_reg = read_register(EXTENSION_REGISTER);
+ ext_reg &= ~EXT_MASK_FSEL0;
+ ext_reg &= ~EXT_MASK_FSEL1;
+ write_register(EXTENSION_REGISTER, ext_reg);
+
+ /* Enable Fout */
+ irq_set(RX8900_TEST_ID, RX8900_FOUT_ENABLE, 0, true);
+
+ fout_count_reset();
+ wait_cycles(2 * 1000000000ULL, 15000);
+
+ /* disable Fout */
+ irq_set(RX8900_TEST_ID, RX8900_FOUT_ENABLE, 0, false);
+
+ /* There appears to be some rounding errors in the timer,
+ * we'll tolerate it for now
+ */
+ g_assert_cmpuint(fout_counts, >=, 32768 * 2);
+ g_assert_cmpuint(fout_counts, <=, 65540);
+}
+
+/**
+ * Check the countdown timer operates at 1 Hz
+ */
+static void check_countdown_1hz(void)
+{
+ uint8_t ext_reg;
+
+ write_register(TIMER_COUNTER_0, 5);
+ write_register(TIMER_COUNTER_1, 0);
+
+ ext_reg = read_register(EXTENSION_REGISTER);
+ ext_reg &= ~EXT_MASK_TSEL1;
+ ext_reg |= EXT_MASK_TSEL0;
+ ext_reg |= EXT_MASK_TE;
+ write_register(EXTENSION_REGISTER, ext_reg);
+
+ count_reset();
+ wait_cycles(5 * 1000000000ULL, 1000000);
+
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_TF], ==, 0);
+
+ wait_cycles(1 * 1000000000ULL, 1000000);
+
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_TF], ==, 1);
+}
+
+/**
+ * Check the countdown timer operates at 64 Hz
+ */
+static void check_countdown_64hz(void)
+{
+ uint8_t ext_reg;
+
+ write_register(TIMER_COUNTER_0, 0x40);
+ write_register(TIMER_COUNTER_1, 0x01); /* 5 * 64 */
+
+ ext_reg = read_register(EXTENSION_REGISTER);
+ ext_reg &= ~EXT_MASK_TSEL0;
+ ext_reg &= ~EXT_MASK_TSEL1;
+ ext_reg |= EXT_MASK_TE;
+ write_register(EXTENSION_REGISTER, ext_reg);
+
+ count_reset();
+ wait_cycles(5 * 1000000000ULL, 1000000);
+
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_TF], ==, 0);
+
+ wait_cycles(1 * 1000000000ULL, 1000000);
+
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_TF], ==, 1);
+}
+
+/**
+ * Check the countdown timer operates at 4096 Hz
+ */
+static void check_countdown_4096hz(void)
+{
+ uint8_t ext_reg;
+
+ write_register(TIMER_COUNTER_0, 0xFF);
+ write_register(TIMER_COUNTER_1, 0x0F); /* 4095 */
+ ext_reg = read_register(EXTENSION_REGISTER);
+ ext_reg |= EXT_MASK_TSEL0;
+ ext_reg |= EXT_MASK_TSEL1;
+ ext_reg |= EXT_MASK_TE;
+ write_register(EXTENSION_REGISTER, ext_reg);
+
+ count_reset();
+ wait_cycles(999755859ULL, 10000);
+
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_TF], ==, 0);
+
+ wait_cycles(244141ULL, 10000);
+
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_TF], ==, 1);
+}
+
+/**
+ * Check the countdown timer operates at 1 minute
+ */
+static void check_countdown_1m(void)
+{
+ uint8_t ext_reg;
+
+ write_register(TIMER_COUNTER_0, 0x01);
+ write_register(TIMER_COUNTER_1, 0x00);
+ ext_reg = read_register(EXTENSION_REGISTER);
+ ext_reg &= ~EXT_MASK_TSEL0;
+ ext_reg |= EXT_MASK_TSEL1;
+ ext_reg |= EXT_MASK_TE;
+ write_register(EXTENSION_REGISTER, ext_reg);
+
+ count_reset();
+ wait_cycles(59 * 1000000000ULL, 100000);
+
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_TF], ==, 0);
+
+ wait_cycles(1000000000LL, 100000);
+
+ g_assert_cmpuint(interrupt_counts[FLAG_REG_TF], ==, 1);
+}
+
+
+int main(int argc, char **argv)
+{
+ QTestState *s = NULL;
+ int ret;
+ char args[255];
+ snprintf(args, sizeof(args), "-display none -machine imx25-pdk "
+ "-device rx8900,bus=i2c.0,address=0x%x,id=%s",
+ RX8900_ADDR, RX8900_TEST_ID);
+
+ g_test_init(&argc, &argv, NULL);
+
+ s = qtest_start(args);
+ i2c = imx_i2c_create(IMX25_I2C_0_BASE);
+ addr = RX8900_ADDR;
+
+ irq_intercept_out(RX8900_TEST_ID);
+ irq_attach(RX8900_INTERRUPT_OUT, 0, handle_interrupt, NULL);
+ irq_attach(RX8900_FOUT, 0, handle_fout, NULL);
+
+ qtest_add_func("/rx8900/reset", check_reset);
+ qtest_add_func("/rx8900/tx-rx", send_and_receive);
+ qtest_add_func("/rx8900/temperature", check_temperature);
+ qtest_add_func("/rx8900/rollover", check_rollover);
+ qtest_add_func("/rx8900/update-interrupt-disabled",
+ check_update_interrupt_disabled);
+ qtest_add_func("/rx8900/update-interrupt-seconds",
+ check_update_interrupt_seconds);
+ qtest_add_func("/rx8900/update-interrupt-minutes",
+ check_update_interrupt_minutes);
+ qtest_add_func("/rx8900/alarm-interrupt-disabled",
+ check_alarm_interrupt_disabled);
+ qtest_add_func("/rx8900/alarm-interrupt-month",
+ check_alarm_interrupt_day_of_month);
+ qtest_add_func("/rx8900/alarm-interrupt-month-negative",
+ check_alarm_interrupt_day_of_month_negative);
+ qtest_add_func("/rx8900/alarm-interrupt-week",
+ check_alarm_interrupt_day_of_week);
+ qtest_add_func("/rx8900/alarm-interrupt-week-negative",
+ check_alarm_interrupt_day_of_week_negative);
+ qtest_add_func("/rx8900/fout_1hz", check_fout_1hz);
+ qtest_add_func("/rx8900/fout_1024hz", check_fout_1024hz);
+ qtest_add_func("/rx8900/fout_32768hz", check_fout_32768hz);
+ qtest_add_func("/rx8900/countdown_1hz", check_countdown_1hz);
+ qtest_add_func("/rx8900/countdown_64hz", check_countdown_64hz);
+ qtest_add_func("/rx8900/countdown_4096hz", check_countdown_4096hz);
+ qtest_add_func("/rx8900/countdown_1m", check_countdown_1m);
+
+ ret = g_test_run();
+
+ if (s) {
+ qtest_quit(s);
+ }
+ g_free(i2c);
+
+ return ret;
+}
--
2.7.4
- Re: [Qemu-arm] [PATCH 4/4] arm: Add an RX8900 RTC to the ASpeed board, (continued)
- [Qemu-arm] [PATCH 2/4] qtest: Support named interrupts, Alastair D'Silva, 2016/11/17
- Re: [Qemu-arm] [PATCH 2/4] qtest: Support named interrupts, Cédric Le Goater, 2016/11/22
- Re: [Qemu-arm] [PATCH 2/4] qtest: Support named interrupts, Paolo Bonzini, 2016/11/22
- Re: [Qemu-arm] [PATCH 2/4] qtest: Support named interrupts, Alastair D'Silva, 2016/11/22
- Re: [Qemu-arm] [PATCH 2/4] qtest: Support named interrupts, Paolo Bonzini, 2016/11/22
- Re: [Qemu-arm] [PATCH 2/4] qtest: Support named interrupts, Alastair D'Silva, 2016/11/22
- Re: [Qemu-arm] [PATCH 2/4] qtest: Support named interrupts, Paolo Bonzini, 2016/11/23
- Re: [Qemu-arm] [PATCH 2/4] qtest: Support named interrupts, Edgar E. Iglesias, 2016/11/23
- Re: [Qemu-arm] [PATCH 2/4] qtest: Support named interrupts, Paolo Bonzini, 2016/11/23
[Qemu-arm] [PATCH 3/4] hw/timer: Add Epson RX8900 RTC support,
Alastair D'Silva <=
Re: [Qemu-arm] [Qemu-devel] [PATCH 0/4] Add support for the Epson RX8900 RTC to the aspeed board, no-reply, 2016/11/17