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Re: [PATCH v2 1/2] hw/misc: add an EMC141{3,4} device model
From: |
Cédric Le Goater |
Subject: |
Re: [PATCH v2 1/2] hw/misc: add an EMC141{3,4} device model |
Date: |
Thu, 8 Oct 2020 19:19:31 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 |
On 10/8/20 11:02 AM, John Wang wrote:
> Largely inspired by the TMP421 temperature sensor, here is a model for
> the EMC1413 temperature sensors.
>
> Specs can be found here :
> https://pdf1.alldatasheet.com/datasheet-pdf/view/533713/SMSC/EMC1413.html
>
> Signed-off-by: John Wang <wangzhiqiang.bj@bytedance.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
> ---
> v2:
> - Remove DeviceInfo
I will look at doing the same in TMP421. All the temperature devices
have a lot in common.
Philippe,
Did you have a patchset introducing a common framework ?
Thanks,
C.
> - commit message: TMP423 -> TMP421
> ---
> hw/arm/Kconfig | 1 +
> hw/misc/Kconfig | 4 +
> hw/misc/emc1413.c | 305 ++++++++++++++++++++++++++++++++++++++++++++
> hw/misc/meson.build | 1 +
> 4 files changed, 311 insertions(+)
> create mode 100644 hw/misc/emc1413.c
>
> diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
> index f303c6bead..8801ada145 100644
> --- a/hw/arm/Kconfig
> +++ b/hw/arm/Kconfig
> @@ -402,6 +402,7 @@ config ASPEED_SOC
> select SSI_M25P80
> select TMP105
> select TMP421
> + select EMC1413
> select UNIMP
>
> config MPS2
> diff --git a/hw/misc/Kconfig b/hw/misc/Kconfig
> index 3185456110..91badf2d4d 100644
> --- a/hw/misc/Kconfig
> +++ b/hw/misc/Kconfig
> @@ -13,6 +13,10 @@ config TMP421
> bool
> depends on I2C
>
> +config EMC1413
> + bool
> + depends on I2C
> +
> config ISA_DEBUG
> bool
> depends on ISA_BUS
> diff --git a/hw/misc/emc1413.c b/hw/misc/emc1413.c
> new file mode 100644
> index 0000000000..160a59495a
> --- /dev/null
> +++ b/hw/misc/emc1413.c
> @@ -0,0 +1,305 @@
> +/*
> + * SMSC EMC141X temperature sensor.
> + *
> + * Copyright (c) 2020 Bytedance Corporation
> + * Written by John Wang <wangzhiqiang.bj@bytedance.com>
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation; either version 2 or
> + * (at your option) version 3 of the License.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License along
> + * with this program; if not, see <http://www.gnu.org/licenses/>.
> + */
> +
> +#include "qemu/osdep.h"
> +#include "hw/i2c/i2c.h"
> +#include "migration/vmstate.h"
> +#include "qapi/error.h"
> +#include "qapi/visitor.h"
> +#include "qemu/module.h"
> +#include "qom/object.h"
> +
> +#define DEVICE_ID_REG 0xfd
> +#define MANUFACTURER_ID_REG 0xfe
> +#define REVISION_REG 0xff
> +#define EMC1413_DEVICE_ID 0x21
> +#define EMC1414_DEVICE_ID 0x25
> +
> +struct EMC141XState {
> + I2CSlave i2c;
> + uint8_t temperature[4];
> + uint8_t min[4];
> + uint8_t max[4];
> + uint8_t len;
> + uint8_t data;
> + uint8_t pointer;
> +};
> +
> +struct EMC141XClass {
> + I2CSlaveClass parent_class;
> + uint8_t model;
> +};
> +
> +#define TYPE_EMC141X "emc141x"
> +OBJECT_DECLARE_TYPE(EMC141XState, EMC141XClass, EMC141X)
> +
> +
> +/* the EMC141X registers */
> +#define EMC141X_TEMP_HIGH0 0x00
> +#define EMC141X_TEMP_HIGH1 0x01
> +#define EMC141X_TEMP_HIGH2 0x23
> +#define EMC141X_TEMP_HIGH3 0x2a
> +#define EMC141X_TEMP_MAX_HIGH0 0x05
> +#define EMC141X_TEMP_MIN_HIGH0 0x06
> +#define EMC141X_TEMP_MAX_HIGH1 0x07
> +#define EMC141X_TEMP_MIN_HIGH1 0x08
> +#define EMC141X_TEMP_MAX_HIGH2 0x15
> +#define EMC141X_TEMP_MIN_HIGH2 0x16
> +#define EMC141X_TEMP_MAX_HIGH3 0x2c
> +#define EMC141X_TEMP_MIN_HIGH3 0x2d
> +
> +static void emc141x_get_temperature(Object *obj, Visitor *v, const char
> *name,
> + void *opaque, Error **errp)
> +{
> + EMC141XState *s = EMC141X(obj);
> + int64_t value;
> + int tempid;
> +
> + if (sscanf(name, "temperature%d", &tempid) != 1) {
> + error_setg(errp, "error reading %s: %s", name, g_strerror(errno));
> + return;
> + }
> +
> + if (tempid >= 4 || tempid < 0) {
> + error_setg(errp, "error reading %s", name);
> + return;
> + }
> +
> + value = s->temperature[tempid] * 1000;
> +
> + visit_type_int(v, name, &value, errp);
> +}
> +
> +static void emc141x_set_temperature(Object *obj, Visitor *v, const char
> *name,
> + void *opaque, Error **errp)
> +{
> + EMC141XState *s = EMC141X(obj);
> + int64_t temp;
> + int tempid;
> +
> + if (!visit_type_int(v, name, &temp, errp)) {
> + return;
> + }
> +
> + if (sscanf(name, "temperature%d", &tempid) != 1) {
> + error_setg(errp, "error reading %s: %s", name, g_strerror(errno));
> + return;
> + }
> +
> + if (tempid >= 4 || tempid < 0) {
> + error_setg(errp, "error reading %s", name);
> + return;
> + }
> +
> + s->temperature[tempid] = temp / 1000;
> +}
> +
> +struct emc141x_reg {
> + uint8_t addr;
> + uint8_t *data;
> +};
> +
> +static void emc141x_read(EMC141XState *s)
> +{
> + EMC141XClass *sc = EMC141X_GET_CLASS(s);
> + uint8_t smsc_manufacturer_id = 0x5d;
> + uint8_t revision = 0x04;
> + struct emc141x_reg emc141x_regs[] = {
> + {DEVICE_ID_REG, &sc->model},
> + {MANUFACTURER_ID_REG, &smsc_manufacturer_id},
> + {REVISION_REG, &revision},
> + {EMC141X_TEMP_HIGH0, &s->temperature[0]},
> + {EMC141X_TEMP_HIGH1, &s->temperature[1]},
> + {EMC141X_TEMP_HIGH2, &s->temperature[2]},
> + {EMC141X_TEMP_HIGH3, &s->temperature[3]},
> + {EMC141X_TEMP_MAX_HIGH0, &s->max[0]},
> + {EMC141X_TEMP_MAX_HIGH1, &s->max[1]},
> + {EMC141X_TEMP_MAX_HIGH2, &s->max[2]},
> + {EMC141X_TEMP_MAX_HIGH3, &s->max[3]},
> + {EMC141X_TEMP_MIN_HIGH0, &s->min[0]},
> + {EMC141X_TEMP_MIN_HIGH1, &s->min[1]},
> + {EMC141X_TEMP_MIN_HIGH2, &s->min[2]},
> + {EMC141X_TEMP_MIN_HIGH3, &s->min[3]},
> + };
> + size_t i;
> + for (i = 0; i < ARRAY_SIZE(emc141x_regs); i++) {
> + if (emc141x_regs[i].addr == s->pointer) {
> + s->data = *(emc141x_regs[i].data);
> + return;
> + }
> + }
> +}
> +
> +static void emc141x_write(EMC141XState *s)
> +{
> + struct emc141x_reg emc141x_regs[] = {
> + {EMC141X_TEMP_MAX_HIGH0, &s->max[0]},
> + {EMC141X_TEMP_MAX_HIGH1, &s->max[1]},
> + {EMC141X_TEMP_MAX_HIGH2, &s->max[2]},
> + {EMC141X_TEMP_MAX_HIGH3, &s->max[3]},
> + {EMC141X_TEMP_MIN_HIGH0, &s->min[0]},
> + {EMC141X_TEMP_MIN_HIGH1, &s->min[1]},
> + {EMC141X_TEMP_MIN_HIGH2, &s->min[2]},
> + {EMC141X_TEMP_MIN_HIGH3, &s->min[3]},
> + };
> + size_t i;
> + for (i = 0; i < ARRAY_SIZE(emc141x_regs); i++) {
> + if (emc141x_regs[i].addr == s->pointer) {
> + *(emc141x_regs[i].data) = s->data;
> + return;
> + }
> + }
> +}
> +
> +static uint8_t emc141x_rx(I2CSlave *i2c)
> +{
> + EMC141XState *s = EMC141X(i2c);
> +
> + if (s->len == 0) {
> + s->len++;
> + return s->data;
> + } else {
> + return 0xff;
> + }
> +}
> +
> +static int emc141x_tx(I2CSlave *i2c, uint8_t data)
> +{
> + EMC141XState *s = EMC141X(i2c);
> +
> + if (s->len == 0) {
> + /* first byte is the reg pointer */
> + s->pointer = data;
> + s->len++;
> + } else if (s->len == 1) {
> + s->data = data;
> + emc141x_write(s);
> + }
> +
> + return 0;
> +}
> +
> +static int emc141x_event(I2CSlave *i2c, enum i2c_event event)
> +{
> + EMC141XState *s = EMC141X(i2c);
> +
> + if (event == I2C_START_RECV) {
> + emc141x_read(s);
> + }
> +
> + s->len = 0;
> + return 0;
> +}
> +
> +static const VMStateDescription vmstate_emc141x = {
> + .name = "EMC141X",
> + .version_id = 0,
> + .minimum_version_id = 0,
> + .fields = (VMStateField[]) {
> + VMSTATE_UINT8(len, EMC141XState),
> + VMSTATE_UINT8(data, EMC141XState),
> + VMSTATE_UINT8(pointer, EMC141XState),
> + VMSTATE_UINT8_ARRAY(temperature, EMC141XState, 4),
> + VMSTATE_UINT8_ARRAY(min, EMC141XState, 4),
> + VMSTATE_UINT8_ARRAY(max, EMC141XState, 4),
> + VMSTATE_I2C_SLAVE(i2c, EMC141XState),
> + VMSTATE_END_OF_LIST()
> + }
> +};
> +
> +static void emc141x_reset(I2CSlave *i2c)
> +{
> + EMC141XState *s = EMC141X(i2c);
> +
> + memset(s->temperature, 0, sizeof(s->temperature));
> + memset(s->min, 0, sizeof(s->min));
> + memset(s->max, 0x55, sizeof(s->max));
> + s->pointer = 0;
> + s->len = 0;
> +}
> +
> +static void emc141x_realize(DeviceState *dev, Error **errp)
> +{
> + EMC141XState *s = EMC141X(dev);
> +
> + emc141x_reset(&s->i2c);
> +}
> +
> +static void emc141x_initfn(Object *obj)
> +{
> + object_property_add(obj, "temperature0", "int",
> + emc141x_get_temperature,
> + emc141x_set_temperature, NULL, NULL);
> + object_property_add(obj, "temperature1", "int",
> + emc141x_get_temperature,
> + emc141x_set_temperature, NULL, NULL);
> + object_property_add(obj, "temperature2", "int",
> + emc141x_get_temperature,
> + emc141x_set_temperature, NULL, NULL);
> + object_property_add(obj, "temperature3", "int",
> + emc141x_get_temperature,
> + emc141x_set_temperature, NULL, NULL);
> +}
> +
> +static void emc141x_class_init(ObjectClass *klass, void *data)
> +{
> + DeviceClass *dc = DEVICE_CLASS(klass);
> + I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
> + EMC141XClass *sc = EMC141X_CLASS(klass);
> +
> + dc->realize = emc141x_realize;
> + k->event = emc141x_event;
> + k->recv = emc141x_rx;
> + k->send = emc141x_tx;
> + dc->vmsd = &vmstate_emc141x;
> + sc->model = (uintptr_t)data;
> +}
> +
> +static const TypeInfo emc141x_info = {
> + .name = TYPE_EMC141X,
> + .parent = TYPE_I2C_SLAVE,
> + .instance_size = sizeof(EMC141XState),
> + .class_size = sizeof(EMC141XClass),
> + .instance_init = emc141x_initfn,
> + .abstract = true,
> +};
> +
> +static const TypeInfo emc1413_info = {
> + .name = "emc1413",
> + .parent = TYPE_EMC141X,
> + .class_init = emc141x_class_init,
> + .class_data = (void *)EMC1413_DEVICE_ID,
> +};
> +
> +static const TypeInfo emc1414_info = {
> + .name = "emc1414",
> + .parent = TYPE_EMC141X,
> + .class_init = emc141x_class_init,
> + .class_data = (void *)EMC1414_DEVICE_ID,
> +};
> +
> +static void emc141x_register_types(void)
> +{
> + type_register_static(&emc141x_info);
> + type_register_static(&emc1413_info);
> + type_register_static(&emc1414_info);
> +}
> +
> +type_init(emc141x_register_types)
> diff --git a/hw/misc/meson.build b/hw/misc/meson.build
> index 793d45b1dc..08821c72ba 100644
> --- a/hw/misc/meson.build
> +++ b/hw/misc/meson.build
> @@ -9,6 +9,7 @@ softmmu_ss.add(when: 'CONFIG_PCI_TESTDEV', if_true:
> files('pci-testdev.c'))
> softmmu_ss.add(when: 'CONFIG_SGA', if_true: files('sga.c'))
> softmmu_ss.add(when: 'CONFIG_TMP105', if_true: files('tmp105.c'))
> softmmu_ss.add(when: 'CONFIG_TMP421', if_true: files('tmp421.c'))
> +softmmu_ss.add(when: 'CONFIG_EMC1413', if_true: files('emc1413.c'))
> softmmu_ss.add(when: 'CONFIG_UNIMP', if_true: files('unimp.c'))
> softmmu_ss.add(when: 'CONFIG_EMPTY_SLOT', if_true: files('empty_slot.c'))
>
>