Largely inspired by the TMP423 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...@bytedance.com> --- hw/arm/Kconfig | 1 + hw/misc/Kconfig | 4 + hw/misc/emc1413.c | 309 ++++++++++++++++++++++++++++++++++++++++++++ hw/misc/meson.build | 1 + 4 files changed, 315 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..2430c3f074 --- /dev/null +++ b/hw/misc/emc1413.c @@ -0,0 +1,309 @@ +/* + * SMSC EMC1413 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 DEVICE_ID_REG 0xfd +#define MANUFACTURER_ID_REG 0xfe +#define REVISION_REG 0xff +#define EMC1413_DEVICE_ID 0x21 +#define EMC1414_DEVICE_ID 0x25 + +typedef struct DeviceInfo { + uint8_t model; + const char *name; +} DeviceInfo; + +static const DeviceInfo devices[] = { + { EMC1413_DEVICE_ID, "emc1413" }, + { EMC1414_DEVICE_ID, "emc1414" }, +}; + +struct EMC1413State { + I2CSlave i2c; + uint8_t temperature[4]; + uint8_t min[4]; + uint8_t max[4]; + uint8_t len; + uint8_t data; + uint8_t pointer; + +}; + +struct EMC1413Class { + I2CSlaveClass parent_class; + DeviceInfo *dev; +}; + +#define TYPE_EMC1413 "emc1413-generic" +OBJECT_DECLARE_TYPE(EMC1413State, EMC1413Class, EMC1413) + + +/* the EMC1413 registers */ +#define EMC1413_TEMP_HIGH0 0x00 +#define EMC1413_TEMP_HIGH1 0x01 +#define EMC1413_TEMP_HIGH2 0x23 +#define EMC1413_TEMP_HIGH3 0x2a +#define EMC1413_TEMP_MAX_HIGH0 0x05 +#define EMC1413_TEMP_MIN_HIGH0 0x06 +#define EMC1413_TEMP_MAX_HIGH1 0x07 +#define EMC1413_TEMP_MIN_HIGH1 0x08 +#define EMC1413_TEMP_MAX_HIGH2 0x15 +#define EMC1413_TEMP_MIN_HIGH2 0x16 +#define EMC1413_TEMP_MAX_HIGH3 0x2c +#define EMC1413_TEMP_MIN_HIGH3 0x2d + +static void emc1413_get_temperature(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + EMC1413State *s = EMC1413(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 emc1413_set_temperature(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + EMC1413State *s = EMC1413(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 emc1413_reg { + uint8_t addr; + uint8_t *data; +}; + +static void emc1413_read(EMC1413State *s) +{ + EMC1413Class *sc = EMC1413_GET_CLASS(s); + uint8_t smsc_manufacturer_id = 0x5d; + uint8_t revision = 0x04; + struct emc1413_reg emc1413_regs[] = { + {DEVICE_ID_REG, &sc->dev->model}, + {MANUFACTURER_ID_REG, &smsc_manufacturer_id}, + {REVISION_REG, &revision}, + {EMC1413_TEMP_HIGH0, &s->temperature[0]}, + {EMC1413_TEMP_HIGH1, &s->temperature[1]}, + {EMC1413_TEMP_HIGH2, &s->temperature[2]}, + {EMC1413_TEMP_HIGH3, &s->temperature[3]}, + {EMC1413_TEMP_MAX_HIGH0, &s->max[0]}, + {EMC1413_TEMP_MAX_HIGH1, &s->max[1]}, + {EMC1413_TEMP_MAX_HIGH2, &s->max[2]}, + {EMC1413_TEMP_MAX_HIGH3, &s->max[3]}, + {EMC1413_TEMP_MIN_HIGH0, &s->min[0]}, + {EMC1413_TEMP_MIN_HIGH1, &s->min[1]}, + {EMC1413_TEMP_MIN_HIGH2, &s->min[2]}, + {EMC1413_TEMP_MIN_HIGH3, &s->min[3]}, + }; + size_t i; + for (i = 0; i < ARRAY_SIZE(emc1413_regs); i++) { + if (emc1413_regs[i].addr == s->pointer) { + s->data = *(emc1413_regs[i].data); + return; + } + } +} + +static void emc1413_write(EMC1413State *s) +{ + struct emc1413_reg emc1413_regs[] = { + {EMC1413_TEMP_MAX_HIGH0, &s->max[0]}, + {EMC1413_TEMP_MAX_HIGH1, &s->max[1]}, + {EMC1413_TEMP_MAX_HIGH2, &s->max[2]}, + {EMC1413_TEMP_MAX_HIGH3, &s->max[3]}, + {EMC1413_TEMP_MIN_HIGH0, &s->min[0]}, + {EMC1413_TEMP_MIN_HIGH1, &s->min[1]}, + {EMC1413_TEMP_MIN_HIGH2, &s->min[2]}, + {EMC1413_TEMP_MIN_HIGH3, &s->min[3]}, + }; + size_t i; + for (i = 0; i < ARRAY_SIZE(emc1413_regs); i++) { + if (emc1413_regs[i].addr == s->pointer) { + *(emc1413_regs[i].data) = s->data; + return; + } + } +} + +static uint8_t emc1413_rx(I2CSlave *i2c) +{ + EMC1413State *s = EMC1413(i2c); + + if (s->len == 0) { + s->len++; + return s->data; + } else { + return 0xff; + } +} + +static int emc1413_tx(I2CSlave *i2c, uint8_t data) +{ + EMC1413State *s = EMC1413(i2c); + + if (s->len == 0) { + /* first byte is the reg pointer */ + s->pointer = data; + s->len++; + } else if (s->len == 1) { + s->data = data; + emc1413_write(s); + } + + return 0; +} + +static int emc1413_event(I2CSlave *i2c, enum i2c_event event) +{ + EMC1413State *s = EMC1413(i2c); + + if (event == I2C_START_RECV) { + emc1413_read(s); + } + + s->len = 0; + return 0; +} + +static const VMStateDescription vmstate_emc1413 = { + .name = "EMC1413", + .version_id = 0, + .minimum_version_id = 0, + .fields = (VMStateField[]) { + VMSTATE_UINT8(len, EMC1413State), + VMSTATE_UINT8(data, EMC1413State), + VMSTATE_UINT8(pointer, EMC1413State), + VMSTATE_UINT8_ARRAY(temperature, EMC1413State, 4), + VMSTATE_I2C_SLAVE(i2c, EMC1413State), + VMSTATE_END_OF_LIST() + } +}; + +static void emc1413_reset(I2CSlave *i2c) +{ + EMC1413State *s = EMC1413(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 emc1413_realize(DeviceState *dev, Error **errp) +{ + EMC1413State *s = EMC1413(dev); + + emc1413_reset(&s->i2c); +} + +static void emc1413_initfn(Object *obj) +{ + object_property_add(obj, "temperature0", "int", + emc1413_get_temperature, + emc1413_set_temperature, NULL, NULL); + object_property_add(obj, "temperature1", "int", + emc1413_get_temperature, + emc1413_set_temperature, NULL, NULL); + object_property_add(obj, "temperature2", "int", + emc1413_get_temperature, + emc1413_set_temperature, NULL, NULL); + object_property_add(obj, "temperature3", "int", + emc1413_get_temperature, + emc1413_set_temperature, NULL, NULL); +} + +static void emc1413_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + I2CSlaveClass *k = I2C_SLAVE_CLASS(klass); + EMC1413Class *sc = EMC1413_CLASS(klass); + + dc->realize = emc1413_realize; + k->event = emc1413_event; + k->recv = emc1413_rx; + k->send = emc1413_tx; + dc->vmsd = &vmstate_emc1413; + sc->dev = (DeviceInfo *) data; +} + +static const TypeInfo emc1413_info = { + .name = TYPE_EMC1413, + .parent = TYPE_I2C_SLAVE, + .instance_size = sizeof(EMC1413State), + .class_size = sizeof(EMC1413Class), + .instance_init = emc1413_initfn, + .abstract = true, +}; + +static void emc1413_register_types(void) +{ + int i; + + type_register_static(&emc1413_info); + for (i = 0; i < ARRAY_SIZE(devices); ++i) { + TypeInfo ti = { + .name = devices[i].name, + .parent = TYPE_EMC1413, + .class_init = emc1413_class_init, + .class_data = (void *) &devices[i], + }; + type_register(&ti); + } +} + +type_init(emc1413_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')) -- 2.25.1