On 06/24/2018 01:20 PM, BALATON Zoltan wrote:
> Basic emulation of the M41T80 serial (I2C) RTC chip. Only getting time
> of day is implemented. Setting time and RTC alarm are not supported.
>
> Signed-off-by: BALATON Zoltan <bala...@eik.bme.hu>
Reviewed-by: Cédric Le Goater <c...@kaod.org>
Thanks,
C.
> ---
> MAINTAINERS | 1 +
> default-configs/ppc-softmmu.mak | 1 +
> hw/timer/Makefile.objs | 1 +
> hw/timer/m41t80.c | 117
> ++++++++++++++++++++++++++++++++++++++++
> 4 files changed, 120 insertions(+)
> create mode 100644 hw/timer/m41t80.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 2874ddc..3bfc4a8 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -839,6 +839,7 @@ M: BALATON Zoltan <bala...@eik.bme.hu>
> L: qemu-...@nongnu.org
> S: Maintained
> F: hw/ide/sii3112.c
> +F: hw/timer/m41t80.c
>
> SH4 Machines
> ------------
> diff --git a/default-configs/ppc-softmmu.mak b/default-configs/ppc-softmmu.mak
> index 851b4af..b8b0526 100644
> --- a/default-configs/ppc-softmmu.mak
> +++ b/default-configs/ppc-softmmu.mak
> @@ -27,6 +27,7 @@ CONFIG_SM501=y
> CONFIG_IDE_SII3112=y
> CONFIG_I2C=y
> CONFIG_BITBANG_I2C=y
> +CONFIG_M41T80=y
>
> # For Macs
> CONFIG_MAC=y
> diff --git a/hw/timer/Makefile.objs b/hw/timer/Makefile.objs
> index 8b27a4b..e16b2b9 100644
> --- a/hw/timer/Makefile.objs
> +++ b/hw/timer/Makefile.objs
> @@ -6,6 +6,7 @@ common-obj-$(CONFIG_CADENCE) += cadence_ttc.o
> common-obj-$(CONFIG_DS1338) += ds1338.o
> common-obj-$(CONFIG_HPET) += hpet.o
> common-obj-$(CONFIG_I8254) += i8254_common.o i8254.o
> +common-obj-$(CONFIG_M41T80) += m41t80.o
> common-obj-$(CONFIG_M48T59) += m48t59.o
> ifeq ($(CONFIG_ISA_BUS),y)
> common-obj-$(CONFIG_M48T59) += m48t59-isa.o
> diff --git a/hw/timer/m41t80.c b/hw/timer/m41t80.c
> new file mode 100644
> index 0000000..734d7d9
> --- /dev/null
> +++ b/hw/timer/m41t80.c
> @@ -0,0 +1,117 @@
> +/*
> + * M41T80 serial rtc emulation
> + *
> + * Copyright (c) 2018 BALATON Zoltan
> + *
> + * This work is licensed under the GNU GPL license version 2 or later.
> + *
> + */
> +
> +#include "qemu/osdep.h"
> +#include "qemu/log.h"
> +#include "qemu/timer.h"
> +#include "qemu/bcd.h"
> +#include "hw/i2c/i2c.h"
> +
> +#define TYPE_M41T80 "m41t80"
> +#define M41T80(obj) OBJECT_CHECK(M41t80State, (obj), TYPE_M41T80)
> +
> +typedef struct M41t80State {
> + I2CSlave parent_obj;
> + int8_t addr;
> +} M41t80State;
> +
> +static void m41t80_realize(DeviceState *dev, Error **errp)
> +{
> + M41t80State *s = M41T80(dev);
> +
> + s->addr = -1;
> +}
> +
> +static int m41t80_send(I2CSlave *i2c, uint8_t data)
> +{
> + M41t80State *s = M41T80(i2c);
> +
> + if (s->addr < 0) {
> + s->addr = data;
> + } else {
> + s->addr++;
> + }
> + return 0;
> +}
> +
> +static int m41t80_recv(I2CSlave *i2c)
> +{
> + M41t80State *s = M41T80(i2c);
> + struct tm now;
> + qemu_timeval tv;
> +
> + if (s->addr < 0) {
> + s->addr = 0;
> + }
> + if (s->addr >= 1 && s->addr <= 7) {
> + qemu_get_timedate(&now, -1);
> + }
> + switch (s->addr++) {
> + case 0:
> + qemu_gettimeofday(&tv);
> + return to_bcd(tv.tv_usec / 10000);
> + case 1:
> + return to_bcd(now.tm_sec);
> + case 2:
> + return to_bcd(now.tm_min);
> + case 3:
> + return to_bcd(now.tm_hour);
> + case 4:
> + return to_bcd(now.tm_wday);
> + case 5:
> + return to_bcd(now.tm_mday);
> + case 6:
> + return to_bcd(now.tm_mon + 1);
> + case 7:
> + return to_bcd(now.tm_year % 100);
> + case 8 ... 19:
> + qemu_log_mask(LOG_UNIMP, "%s: unimplemented register: %d\n",
> + __func__, s->addr - 1);
> + return 0;
> + default:
> + qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid register: %d\n",
> + __func__, s->addr - 1);
> + return 0;
> + }
> +}
> +
> +static int m41t80_event(I2CSlave *i2c, enum i2c_event event)
> +{
> + M41t80State *s = M41T80(i2c);
> +
> + if (event == I2C_START_SEND) {
> + s->addr = -1;
> + }
> + return 0;
> +}
> +
> +static void m41t80_class_init(ObjectClass *klass, void *data)
> +{
> + DeviceClass *dc = DEVICE_CLASS(klass);
> + I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass);
> +
> + dc->realize = m41t80_realize;
> + sc->send = m41t80_send;
> + sc->recv = m41t80_recv;
> + sc->event = m41t80_event;
> +}
> +
> +static const TypeInfo m41t80_info = {
> + .name = TYPE_M41T80,
> + .parent = TYPE_I2C_SLAVE,
> + .instance_size = sizeof(M41t80State),
> + .class_init = m41t80_class_init,
> +};
> +
> +static void m41t80_register_types(void)
> +{
> + type_register_static(&m41t80_info);
> +}
> +
> +type_init(m41t80_register_types)
>
