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authorJohn Wang <wangzhiqiang.bj@bytedance.com>2020-12-10 12:11:03 +0100
committerCédric Le Goater <clg@kaod.org>2020-12-10 12:11:03 +0100
commit5e623f2bf1b4a43022c2fd31919c76ddb9556e17 (patch)
tree52d5054d3f7c739f6258197c234bb0add69ec211 /hw/misc
parent5e7b204dbfae9a562fc73684986f936b97f63877 (diff)
hw/misc: add an EMC141{3,4} device model
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.bj@bytedance.com> Reviewed-by: Cédric Le Goater <clg@kaod.org> Message-Id: <20201122105134.671-1-wangzhiqiang.bj@bytedance.com> Signed-off-by: Cédric Le Goater <clg@kaod.org>
Diffstat (limited to 'hw/misc')
-rw-r--r--hw/misc/Kconfig4
-rw-r--r--hw/misc/emc141x.c326
-rw-r--r--hw/misc/meson.build1
3 files changed, 331 insertions, 0 deletions
diff --git a/hw/misc/Kconfig b/hw/misc/Kconfig
index dc44dc14f6..cf18ac08e6 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..f7c53d48a4
--- /dev/null
+++ b/hw/misc/emc141x.c
@@ -0,0 +1,326 @@
+/*
+ * 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"
+#include "hw/misc/emc141x_regs.h"
+
+#define SENSORS_COUNT_MAX 4
+
+struct EMC141XState {
+ I2CSlave parent_obj;
+ struct {
+ uint8_t raw_temp_min;
+ uint8_t raw_temp_current;
+ uint8_t raw_temp_max;
+ } sensor[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)
+
+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;
+ unsigned tempid;
+
+ if (sscanf(name, "temperature%u", &tempid) != 1) {
+ error_setg(errp, "error reading %s: %s", name, g_strerror(errno));
+ return;
+ }
+
+ if (tempid >= sc->sensors_count) {
+ error_setg(errp, "error reading %s", name);
+ return;
+ }
+
+ value = s->sensor[tempid].raw_temp_current * 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;
+ unsigned tempid;
+
+ if (!visit_type_int(v, name, &temp, errp)) {
+ return;
+ }
+
+ if (sscanf(name, "temperature%u", &tempid) != 1) {
+ error_setg(errp, "error reading %s: %s", name, g_strerror(errno));
+ return;
+ }
+
+ if (tempid >= sc->sensors_count) {
+ error_setg(errp, "error reading %s", name);
+ return;
+ }
+
+ s->sensor[tempid].raw_temp_current = 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->sensor[0].raw_temp_current;
+ break;
+ case EMC141X_TEMP_HIGH1:
+ s->data = s->sensor[1].raw_temp_current;
+ break;
+ case EMC141X_TEMP_HIGH2:
+ s->data = s->sensor[2].raw_temp_current;
+ break;
+ case EMC141X_TEMP_HIGH3:
+ s->data = s->sensor[3].raw_temp_current;
+ break;
+ case EMC141X_TEMP_MAX_HIGH0:
+ s->data = s->sensor[0].raw_temp_max;
+ break;
+ case EMC141X_TEMP_MAX_HIGH1:
+ s->data = s->sensor[1].raw_temp_max;
+ break;
+ case EMC141X_TEMP_MAX_HIGH2:
+ s->data = s->sensor[2].raw_temp_max;
+ break;
+ case EMC141X_TEMP_MAX_HIGH3:
+ s->data = s->sensor[3].raw_temp_max;
+ break;
+ case EMC141X_TEMP_MIN_HIGH0:
+ s->data = s->sensor[0].raw_temp_min;
+ break;
+ case EMC141X_TEMP_MIN_HIGH1:
+ s->data = s->sensor[1].raw_temp_min;
+ break;
+ case EMC141X_TEMP_MIN_HIGH2:
+ s->data = s->sensor[2].raw_temp_min;
+ break;
+ case EMC141X_TEMP_MIN_HIGH3:
+ s->data = s->sensor[3].raw_temp_min;
+ break;
+ default:
+ s->data = 0;
+ }
+}
+
+static void emc141x_write(EMC141XState *s)
+{
+ switch (s->pointer) {
+ case EMC141X_TEMP_MAX_HIGH0:
+ s->sensor[0].raw_temp_max = s->data;
+ break;
+ case EMC141X_TEMP_MAX_HIGH1:
+ s->sensor[1].raw_temp_max = s->data;
+ break;
+ case EMC141X_TEMP_MAX_HIGH2:
+ s->sensor[2].raw_temp_max = s->data;
+ break;
+ case EMC141X_TEMP_MAX_HIGH3:
+ s->sensor[3].raw_temp_max = s->data;
+ break;
+ case EMC141X_TEMP_MIN_HIGH0:
+ s->sensor[0].raw_temp_min = s->data;
+ break;
+ case EMC141X_TEMP_MIN_HIGH1:
+ s->sensor[1].raw_temp_min = s->data;
+ break;
+ case EMC141X_TEMP_MIN_HIGH2:
+ s->sensor[2].raw_temp_min = s->data;
+ break;
+ case EMC141X_TEMP_MIN_HIGH3:
+ s->sensor[3].raw_temp_min = 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_I2C_SLAVE(parent_obj, EMC141XState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void emc141x_reset(DeviceState *dev)
+{
+ EMC141XState *s = EMC141X(dev);
+ int i;
+
+ for (i = 0; i < SENSORS_COUNT_MAX; i++) {
+ s->sensor[i].raw_temp_max = 0x55;
+ }
+ 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 1cd48e8a0f..ce15ffceb9 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'))
softmmu_ss.add(when: 'CONFIG_LED', if_true: files('led.c'))