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hw/misc: add an EMC141{3,4} device model

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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>
This commit is contained in:
John Wang 2020-12-10 12:11:03 +01:00 committed by Cédric Le Goater
parent 5e7b204dbf
commit 5e623f2bf1
7 changed files with 451 additions and 0 deletions
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1
hw/arm/Kconfig
View File

@ -407,6 +407,7 @@ config ASPEED_SOC
select SSI_M25P80
select TMP105
select TMP421
select EMC141X
select UNIMP
select LED

4
hw/misc/Kconfig
View File

@ -13,6 +13,10 @@ config TMP421
bool
depends on I2C
config EMC141X
bool
depends on I2C
config ISA_DEBUG
bool
depends on ISA_BUS

326
hw/misc/emc141x.c Normal file
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@ -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)

1
hw/misc/meson.build
View File

@ -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'))

37
include/hw/misc/emc141x_regs.h Normal file
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@ -0,0 +1,37 @@
/*
* SMSC EMC141X temperature sensor.
*
* Browse the data sheet:
*
* http://ww1.microchip.com/downloads/en/DeviceDoc/20005274A.pdf
*
* This work is licensed under the terms of the GNU GPL, version 2 or
* later. See the COPYING file in the top-level directory.
*/
#ifndef TMP105_REGS_H
#define TMP105_REGS_H
#define EMC1413_DEVICE_ID 0x21
#define EMC1414_DEVICE_ID 0x25
#define MANUFACTURER_ID 0x5d
#define REVISION 0x04
/* 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
#endif

81
tests/qtest/emc141x-test.c Normal file
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@ -0,0 +1,81 @@
/*
* QTest testcase for the EMC141X temperature sensor
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "libqtest-single.h"
#include "libqos/qgraph.h"
#include "libqos/i2c.h"
#include "qapi/qmp/qdict.h"
#include "hw/misc/emc141x_regs.h"
#define EMC1414_TEST_ID "emc1414-test"
static int qmp_emc1414_get_temperature(const char *id)
{
QDict *response;
int ret;
response = qmp("{ 'execute': 'qom-get', 'arguments': { 'path': %s, "
"'property': 'temperature0' } }", id);
g_assert(qdict_haskey(response, "return"));
ret = qdict_get_int(response, "return");
qobject_unref(response);
return ret;
}
static void qmp_emc1414_set_temperature(const char *id, int value)
{
QDict *response;
response = qmp("{ 'execute': 'qom-set', 'arguments': { 'path': %s, "
"'property': 'temperature0', 'value': %d } }", id, value);
g_assert(qdict_haskey(response, "return"));
qobject_unref(response);
}
static void send_and_receive(void *obj, void *data, QGuestAllocator *alloc)
{
uint16_t value;
QI2CDevice *i2cdev = (QI2CDevice *)obj;
value = qmp_emc1414_get_temperature(EMC1414_TEST_ID);
g_assert_cmpuint(value, ==, 0);
value = i2c_get8(i2cdev, EMC141X_TEMP_HIGH0);
g_assert_cmphex(value, ==, 0);
/* The default max value is 85C, 0x55=85 */
value = i2c_get8(i2cdev, EMC141X_TEMP_MAX_HIGH0);
g_assert_cmphex(value, ==, 0x55);
value = i2c_get8(i2cdev, EMC141X_TEMP_MIN_HIGH0);
g_assert_cmphex(value, ==, 0);
/* 3000mc = 30C */
qmp_emc1414_set_temperature(EMC1414_TEST_ID, 30000);
value = qmp_emc1414_get_temperature(EMC1414_TEST_ID);
g_assert_cmpuint(value, ==, 30000);
value = i2c_get8(i2cdev, EMC141X_TEMP_HIGH0);
g_assert_cmphex(value, ==, 30);
}
static void emc1414_register_nodes(void)
{
QOSGraphEdgeOptions opts = {
.extra_device_opts = "id=" EMC1414_TEST_ID ",address=0x70"
};
add_qi2c_address(&opts, &(QI2CAddress) { 0x70 });
qos_node_create_driver("emc1414", i2c_device_create);
qos_node_consumes("emc1414", "i2c-bus", &opts);
qos_add_test("tx-rx", "emc1414", send_and_receive, NULL);
}
libqos_init(emc1414_register_nodes);

1
tests/qtest/meson.build
View File

@ -188,6 +188,7 @@ qos_test_ss.add(
'sdhci-test.c',
'spapr-phb-test.c',
'tmp105-test.c',
'emc141x-test.c',
'usb-hcd-ohci-test.c',
'virtio-test.c',
'virtio-blk-test.c',