Largely inspired by the TMP421 temperature sensor, here is a model for the EMC1413/EMC1414 temperature sensors.
Specs can be found here : http://ww1.microchip.com/downloads/en/DeviceDoc/20005274A.pdf Signed-off-by: John Wang <wangzhiqiang...@bytedance.com> --- v3: - update the link to the spec - Rename emc1413.c to emc141x.c - Add sensors_count in EMC141XClass - Make emc1413_read/write easier to review :) v2: - Remove DeviceInfo - commit message: TMP423 -> TMP421 --- hw/arm/Kconfig | 1 + hw/misc/Kconfig | 4 + hw/misc/emc141x.c | 347 ++++++++++++++++++++++++++++++++++++++++++++ hw/misc/meson.build | 1 + 4 files changed, 353 insertions(+) create mode 100644 hw/misc/emc141x.c diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig index 7d040827af..3dd651a236 100644 --- a/hw/arm/Kconfig +++ b/hw/arm/Kconfig @@ -403,6 +403,7 @@ config ASPEED_SOC select SSI_M25P80 select TMP105 select TMP421 + select EMC141X select UNIMP config MPS2 diff --git a/hw/misc/Kconfig b/hw/misc/Kconfig index 3185456110..169d087d3d 100644 --- a/hw/misc/Kconfig +++ b/hw/misc/Kconfig @@ -13,6 +13,10 @@ config TMP421 bool depends on I2C +config EMC141X + bool + depends on I2C + config ISA_DEBUG bool depends on ISA_BUS diff --git a/hw/misc/emc141x.c b/hw/misc/emc141x.c new file mode 100644 index 0000000000..a2bce74719 --- /dev/null +++ b/hw/misc/emc141x.c @@ -0,0 +1,347 @@ +/* + * SMSC EMC141X temperature sensor. + * + * Copyright (c) 2020 Bytedance Corporation + * Written by John Wang <wangzhiqiang...@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 EMC1413_DEVICE_ID 0x21 +#define EMC1414_DEVICE_ID 0x25 +#define MANUFACTURER_ID 0x5d +#define REVISION 0x04 + +#define SENSORS_COUNT_MAX 4 + +struct EMC141XState { + I2CSlave i2c; + uint8_t temperature[SENSORS_COUNT_MAX]; + uint8_t min[SENSORS_COUNT_MAX]; + uint8_t max[SENSORS_COUNT_MAX]; + uint8_t len; + uint8_t data; + uint8_t pointer; +}; + +struct EMC141XClass { + I2CSlaveClass parent_class; + uint8_t model; + unsigned sensors_count; +}; + +#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 +#define EMC141X_DEVICE_ID 0xfd +#define EMC141X_MANUFACTURER_ID 0xfe +#define EMC141X_REVISION 0xff + +static void emc141x_get_temperature(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + EMC141XState *s = EMC141X(obj); + EMC141XClass *sc = EMC141X_GET_CLASS(s); + 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 >= sc->sensors_count || 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); + EMC141XClass *sc = EMC141X_GET_CLASS(s); + 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 >= sc->sensors_count || tempid < 0) { + error_setg(errp, "error reading %s", name); + return; + } + + s->temperature[tempid] = temp / 1000; +} + +static void emc141x_read(EMC141XState *s) +{ + EMC141XClass *sc = EMC141X_GET_CLASS(s); + switch (s->pointer) { + case EMC141X_DEVICE_ID: + s->data = sc->model; + break; + case EMC141X_MANUFACTURER_ID: + s->data = MANUFACTURER_ID; + break; + case EMC141X_REVISION: + s->data = REVISION; + break; + case EMC141X_TEMP_HIGH0: + s->data = s->temperature[0]; + break; + case EMC141X_TEMP_HIGH1: + s->data = s->temperature[1]; + break; + case EMC141X_TEMP_HIGH2: + s->data = s->temperature[2]; + break; + case EMC141X_TEMP_HIGH3: + s->data = s->temperature[3]; + break; + case EMC141X_TEMP_MAX_HIGH0: + s->data = s->max[0]; + break; + case EMC141X_TEMP_MAX_HIGH1: + s->data = s->max[1]; + break; + case EMC141X_TEMP_MAX_HIGH2: + s->data = s->max[2]; + break; + case EMC141X_TEMP_MAX_HIGH3: + s->data = s->max[3]; + break; + case EMC141X_TEMP_MIN_HIGH0: + s->data = s->min[0]; + break; + case EMC141X_TEMP_MIN_HIGH1: + s->data = s->min[1]; + break; + case EMC141X_TEMP_MIN_HIGH2: + s->data = s->min[2]; + break; + case EMC141X_TEMP_MIN_HIGH3: + s->data = s->min[3]; + break; + default: + s->data = 0; + } +} + +static void emc141x_write(EMC141XState *s) +{ + switch (s->pointer) { + case EMC141X_TEMP_MAX_HIGH0: + s->max[0] = s->data; + break; + case EMC141X_TEMP_MAX_HIGH1: + s->max[1] = s->data; + break; + case EMC141X_TEMP_MAX_HIGH2: + s->max[2] = s->data; + break; + case EMC141X_TEMP_MAX_HIGH3: + s->max[3] = s->data; + break; + case EMC141X_TEMP_MIN_HIGH0: + s->min[0] = s->data; + break; + case EMC141X_TEMP_MIN_HIGH1: + s->min[1] = s->data; + break; + case EMC141X_TEMP_MIN_HIGH2: + s->min[2] = s->data; + break; + case EMC141X_TEMP_MIN_HIGH3: + s->min[3] = s->data; + break; + default: + s->data = 0; + } +} + +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, SENSORS_COUNT_MAX), + VMSTATE_UINT8_ARRAY(min, EMC141XState, SENSORS_COUNT_MAX), + VMSTATE_UINT8_ARRAY(max, EMC141XState, SENSORS_COUNT_MAX), + VMSTATE_I2C_SLAVE(i2c, EMC141XState), + VMSTATE_END_OF_LIST() + } +}; + +static void emc141x_reset(DeviceState *dev) +{ + EMC141XState *s = EMC141X(dev); + + memset(s->min, 0, sizeof(s->min)); + memset(s->max, 0x55, sizeof(s->max)); + s->pointer = 0; + s->len = 0; +} + +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); + + dc->reset = emc141x_reset; + k->event = emc141x_event; + k->recv = emc141x_rx; + k->send = emc141x_tx; + dc->vmsd = &vmstate_emc141x; +} + +static void emc1413_class_init(ObjectClass *klass, void *data) +{ + EMC141XClass *ec = EMC141X_CLASS(klass); + + emc141x_class_init(klass, data); + ec->model = EMC1413_DEVICE_ID; + ec->sensors_count = 3; +} + +static void emc1414_class_init(ObjectClass *klass, void *data) +{ + EMC141XClass *ec = EMC141X_CLASS(klass); + + emc141x_class_init(klass, data); + ec->model = EMC1414_DEVICE_ID; + ec->sensors_count = 4; +} + +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 = emc1413_class_init, +}; + +static const TypeInfo emc1414_info = { + .name = "emc1414", + .parent = TYPE_EMC141X, + .class_init = emc1414_class_init, +}; + +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..b18693c9af 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_EMC141X', if_true: files('emc141x.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')) -- 2.17.1
