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sensor: Move hardware sensors from misc to a sensor directory

Browse source 
Lots of this are expected to be coming in, create a directory for them.

Also move the tmp105.h file into the include directory where it
should be.

Cc: Cédric Le Goater <clg@kaod.org>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Andrew Jeffery <andrew@aj.id.au>
Cc: Joel Stanley <joel@jms.id.au>
Cc: Andrzej Zaborowski <balrogg@gmail.com>
Cc: qemu-arm@nongnu.org
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Acked-by: Cédric Le Goater <clg@kaod.org>
This commit is contained in:
Corey Minyard 2021-05-18 16:08:03 -05:00
parent 58f3e3fe69
commit 5e9ae4b1a3
17 changed files with 24 additions and 23 deletions
Download patch file Download diff file Expand all files Collapse all files

11
hw/sensor/Kconfig Normal file
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config TMP105
bool
depends on I2C
config TMP421
bool
depends on I2C
config EMC141X
bool
depends on I2C

326
hw/sensor/emc141x.c Normal file
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/*
* 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/sensor/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)

3
hw/sensor/meson.build Normal file
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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'))

328
hw/sensor/tmp105.c Normal file
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/*
* Texas Instruments TMP105 temperature sensor.
*
* Copyright (C) 2008 Nokia Corporation
* Written by Andrzej Zaborowski <andrew@openedhand.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 "hw/irq.h"
#include "migration/vmstate.h"
#include "hw/sensor/tmp105.h"
#include "qapi/error.h"
#include "qapi/visitor.h"
#include "qemu/module.h"
static void tmp105_interrupt_update(TMP105State *s)
{
qemu_set_irq(s->pin, s->alarm ^ ((~s->config >> 2) & 1)); /* POL */
}
static void tmp105_alarm_update(TMP105State *s)
{
if ((s->config >> 0) & 1) { /* SD */
if ((s->config >> 7) & 1) /* OS */
s->config &= ~(1 << 7); /* OS */
else
return;
}
if (s->config >> 1 & 1) {
/*
* TM == 1 : Interrupt mode. We signal Alert when the
* temperature rises above T_high, and expect the guest to clear
* it (eg by reading a device register).
*/
if (s->detect_falling) {
if (s->temperature < s->limit[0]) {
s->alarm = 1;
s->detect_falling = false;
}
} else {
if (s->temperature >= s->limit[1]) {
s->alarm = 1;
s->detect_falling = true;
}
}
} else {
/*
* TM == 0 : Comparator mode. We signal Alert when the temperature
* rises above T_high, and stop signalling it when the temperature
* falls below T_low.
*/
if (s->detect_falling) {
if (s->temperature < s->limit[0]) {
s->alarm = 0;
s->detect_falling = false;
}
} else {
if (s->temperature >= s->limit[1]) {
s->alarm = 1;
s->detect_falling = true;
}
}
}
tmp105_interrupt_update(s);
}
static void tmp105_get_temperature(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
TMP105State *s = TMP105(obj);
int64_t value = s->temperature * 1000 / 256;
visit_type_int(v, name, &value, errp);
}
/* Units are 0.001 centigrades relative to 0 C. s->temperature is 8.8
* fixed point, so units are 1/256 centigrades. A simple ratio will do.
*/
static void tmp105_set_temperature(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
TMP105State *s = TMP105(obj);
int64_t temp;
if (!visit_type_int(v, name, &temp, errp)) {
return;
}
if (temp >= 128000 || temp < -128000) {
error_setg(errp, "value %" PRId64 ".%03" PRIu64 " C is out of range",
temp / 1000, temp % 1000);
return;
}
s->temperature = (int16_t) (temp * 256 / 1000);
tmp105_alarm_update(s);
}
static const int tmp105_faultq[4] = { 1, 2, 4, 6 };
static void tmp105_read(TMP105State *s)
{
s->len = 0;
if ((s->config >> 1) & 1) { /* TM */
s->alarm = 0;
tmp105_interrupt_update(s);
}
switch (s->pointer & 3) {
case TMP105_REG_TEMPERATURE:
s->buf[s->len ++] = (((uint16_t) s->temperature) >> 8);
s->buf[s->len ++] = (((uint16_t) s->temperature) >> 0) &
(0xf0 << ((~s->config >> 5) & 3)); /* R */
break;
case TMP105_REG_CONFIG:
s->buf[s->len ++] = s->config;
break;
case TMP105_REG_T_LOW:
s->buf[s->len ++] = ((uint16_t) s->limit[0]) >> 8;
s->buf[s->len ++] = ((uint16_t) s->limit[0]) >> 0;
break;
case TMP105_REG_T_HIGH:
s->buf[s->len ++] = ((uint16_t) s->limit[1]) >> 8;
s->buf[s->len ++] = ((uint16_t) s->limit[1]) >> 0;
break;
}
}
static void tmp105_write(TMP105State *s)
{
switch (s->pointer & 3) {
case TMP105_REG_TEMPERATURE:
break;
case TMP105_REG_CONFIG:
if (s->buf[0] & ~s->config & (1 << 0)) /* SD */
printf("%s: TMP105 shutdown\n", __func__);
s->config = s->buf[0];
s->faults = tmp105_faultq[(s->config >> 3) & 3]; /* F */
tmp105_alarm_update(s);
break;
case TMP105_REG_T_LOW:
case TMP105_REG_T_HIGH:
if (s->len >= 3)
s->limit[s->pointer & 1] = (int16_t)
((((uint16_t) s->buf[0]) << 8) | s->buf[1]);
tmp105_alarm_update(s);
break;
}
}
static uint8_t tmp105_rx(I2CSlave *i2c)
{
TMP105State *s = TMP105(i2c);
if (s->len < 2) {
return s->buf[s->len ++];
} else {
return 0xff;
}
}
static int tmp105_tx(I2CSlave *i2c, uint8_t data)
{
TMP105State *s = TMP105(i2c);
if (s->len == 0) {
s->pointer = data;
s->len++;
} else {
if (s->len <= 2) {
s->buf[s->len - 1] = data;
}
s->len++;
tmp105_write(s);
}
return 0;
}
static int tmp105_event(I2CSlave *i2c, enum i2c_event event)
{
TMP105State *s = TMP105(i2c);
if (event == I2C_START_RECV) {
tmp105_read(s);
}
s->len = 0;
return 0;
}
static int tmp105_post_load(void *opaque, int version_id)
{
TMP105State *s = opaque;
s->faults = tmp105_faultq[(s->config >> 3) & 3]; /* F */
tmp105_interrupt_update(s);
return 0;
}
static bool detect_falling_needed(void *opaque)
{
TMP105State *s = opaque;
/*
* We only need to migrate the detect_falling bool if it's set;
* for migration from older machines we assume that it is false
* (ie temperature is not out of range).
*/
return s->detect_falling;
}
static const VMStateDescription vmstate_tmp105_detect_falling = {
.name = "TMP105/detect-falling",
.version_id = 1,
.minimum_version_id = 1,
.needed = detect_falling_needed,
.fields = (VMStateField[]) {
VMSTATE_BOOL(detect_falling, TMP105State),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_tmp105 = {
.name = "TMP105",
.version_id = 0,
.minimum_version_id = 0,
.post_load = tmp105_post_load,
.fields = (VMStateField[]) {
VMSTATE_UINT8(len, TMP105State),
VMSTATE_UINT8_ARRAY(buf, TMP105State, 2),
VMSTATE_UINT8(pointer, TMP105State),
VMSTATE_UINT8(config, TMP105State),
VMSTATE_INT16(temperature, TMP105State),
VMSTATE_INT16_ARRAY(limit, TMP105State, 2),
VMSTATE_UINT8(alarm, TMP105State),
VMSTATE_I2C_SLAVE(i2c, TMP105State),
VMSTATE_END_OF_LIST()
},
.subsections = (const VMStateDescription*[]) {
&vmstate_tmp105_detect_falling,
NULL
}
};
static void tmp105_reset(I2CSlave *i2c)
{
TMP105State *s = TMP105(i2c);
s->temperature = 0;
s->pointer = 0;
s->config = 0;
s->faults = tmp105_faultq[(s->config >> 3) & 3];
s->alarm = 0;
s->detect_falling = false;
s->limit[0] = 0x4b00; /* T_LOW, 75 degrees C */
s->limit[1] = 0x5000; /* T_HIGH, 80 degrees C */
tmp105_interrupt_update(s);
}
static void tmp105_realize(DeviceState *dev, Error **errp)
{
I2CSlave *i2c = I2C_SLAVE(dev);
TMP105State *s = TMP105(i2c);
qdev_init_gpio_out(&i2c->qdev, &s->pin, 1);
tmp105_reset(&s->i2c);
}
static void tmp105_initfn(Object *obj)
{
object_property_add(obj, "temperature", "int",
tmp105_get_temperature,
tmp105_set_temperature, NULL, NULL);
}
static void tmp105_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
dc->realize = tmp105_realize;
k->event = tmp105_event;
k->recv = tmp105_rx;
k->send = tmp105_tx;
dc->vmsd = &vmstate_tmp105;
}
static const TypeInfo tmp105_info = {
.name = TYPE_TMP105,
.parent = TYPE_I2C_SLAVE,
.instance_size = sizeof(TMP105State),
.instance_init = tmp105_initfn,
.class_init = tmp105_class_init,
};
static void tmp105_register_types(void)
{
type_register_static(&tmp105_info);
}
type_init(tmp105_register_types)

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hw/sensor/tmp421.c Normal file
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/*
* Texas Instruments TMP421 temperature sensor.
*
* Copyright (c) 2016 IBM Corporation.
*
* Largely inspired by :
*
* Texas Instruments TMP105 temperature sensor.
*
* Copyright (C) 2008 Nokia Corporation
* Written by Andrzej Zaborowski <andrew@openedhand.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"
/* Manufacturer / Device ID's */
#define TMP421_MANUFACTURER_ID 0x55
#define TMP421_DEVICE_ID 0x21
#define TMP422_DEVICE_ID 0x22
#define TMP423_DEVICE_ID 0x23
typedef struct DeviceInfo {
int model;
const char *name;
} DeviceInfo;
static const DeviceInfo devices[] = {
{ TMP421_DEVICE_ID, "tmp421" },
{ TMP422_DEVICE_ID, "tmp422" },
{ TMP423_DEVICE_ID, "tmp423" },
};
struct TMP421State {
/*< private >*/
I2CSlave i2c;
/*< public >*/
int16_t temperature[4];
uint8_t status;
uint8_t config[2];
uint8_t rate;
uint8_t len;
uint8_t buf[2];
uint8_t pointer;
};
struct TMP421Class {
I2CSlaveClass parent_class;
DeviceInfo *dev;
};
#define TYPE_TMP421 "tmp421-generic"
OBJECT_DECLARE_TYPE(TMP421State, TMP421Class, TMP421)
/* the TMP421 registers */
#define TMP421_STATUS_REG 0x08
#define TMP421_STATUS_BUSY (1 << 7)
#define TMP421_CONFIG_REG_1 0x09
#define TMP421_CONFIG_RANGE (1 << 2)
#define TMP421_CONFIG_SHUTDOWN (1 << 6)
#define TMP421_CONFIG_REG_2 0x0A
#define TMP421_CONFIG_RC (1 << 2)
#define TMP421_CONFIG_LEN (1 << 3)
#define TMP421_CONFIG_REN (1 << 4)
#define TMP421_CONFIG_REN2 (1 << 5)
#define TMP421_CONFIG_REN3 (1 << 6)
#define TMP421_CONVERSION_RATE_REG 0x0B
#define TMP421_ONE_SHOT 0x0F
#define TMP421_RESET 0xFC
#define TMP421_MANUFACTURER_ID_REG 0xFE
#define TMP421_DEVICE_ID_REG 0xFF
#define TMP421_TEMP_MSB0 0x00
#define TMP421_TEMP_MSB1 0x01
#define TMP421_TEMP_MSB2 0x02
#define TMP421_TEMP_MSB3 0x03
#define TMP421_TEMP_LSB0 0x10
#define TMP421_TEMP_LSB1 0x11
#define TMP421_TEMP_LSB2 0x12
#define TMP421_TEMP_LSB3 0x13
static const int32_t mins[2] = { -40000, -55000 };
static const int32_t maxs[2] = { 127000, 150000 };
static void tmp421_get_temperature(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
TMP421State *s = TMP421(obj);
bool ext_range = (s->config[0] & TMP421_CONFIG_RANGE);
int offset = ext_range * 64 * 256;
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] - offset) * 1000 + 128) / 256;
visit_type_int(v, name, &value, errp);
}
/* Units are 0.001 centigrades relative to 0 C. s->temperature is 8.8
* fixed point, so units are 1/256 centigrades. A simple ratio will do.
*/
static void tmp421_set_temperature(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
TMP421State *s = TMP421(obj);
int64_t temp;
bool ext_range = (s->config[0] & TMP421_CONFIG_RANGE);
int offset = ext_range * 64 * 256;
int tempid;
if (!visit_type_int(v, name, &temp, errp)) {
return;
}
if (temp >= maxs[ext_range] || temp < mins[ext_range]) {
error_setg(errp, "value %" PRId64 ".%03" PRIu64 " C is out of range",
temp / 1000, temp % 1000);
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] = (int16_t) ((temp * 256 - 128) / 1000) + offset;
}
static void tmp421_read(TMP421State *s)
{
TMP421Class *sc = TMP421_GET_CLASS(s);
s->len = 0;
switch (s->pointer) {
case TMP421_MANUFACTURER_ID_REG:
s->buf[s->len++] = TMP421_MANUFACTURER_ID;
break;
case TMP421_DEVICE_ID_REG:
s->buf[s->len++] = sc->dev->model;
break;
case TMP421_CONFIG_REG_1:
s->buf[s->len++] = s->config[0];
break;
case TMP421_CONFIG_REG_2:
s->buf[s->len++] = s->config[1];
break;
case TMP421_CONVERSION_RATE_REG:
s->buf[s->len++] = s->rate;
break;
case TMP421_STATUS_REG:
s->buf[s->len++] = s->status;
break;
/* FIXME: check for channel enablement in config registers */
case TMP421_TEMP_MSB0:
s->buf[s->len++] = (((uint16_t) s->temperature[0]) >> 8);
s->buf[s->len++] = (((uint16_t) s->temperature[0]) >> 0) & 0xf0;
break;
case TMP421_TEMP_MSB1:
s->buf[s->len++] = (((uint16_t) s->temperature[1]) >> 8);
s->buf[s->len++] = (((uint16_t) s->temperature[1]) >> 0) & 0xf0;
break;
case TMP421_TEMP_MSB2:
s->buf[s->len++] = (((uint16_t) s->temperature[2]) >> 8);
s->buf[s->len++] = (((uint16_t) s->temperature[2]) >> 0) & 0xf0;
break;
case TMP421_TEMP_MSB3:
s->buf[s->len++] = (((uint16_t) s->temperature[3]) >> 8);
s->buf[s->len++] = (((uint16_t) s->temperature[3]) >> 0) & 0xf0;
break;
case TMP421_TEMP_LSB0:
s->buf[s->len++] = (((uint16_t) s->temperature[0]) >> 0) & 0xf0;
break;
case TMP421_TEMP_LSB1:
s->buf[s->len++] = (((uint16_t) s->temperature[1]) >> 0) & 0xf0;
break;
case TMP421_TEMP_LSB2:
s->buf[s->len++] = (((uint16_t) s->temperature[2]) >> 0) & 0xf0;
break;
case TMP421_TEMP_LSB3:
s->buf[s->len++] = (((uint16_t) s->temperature[3]) >> 0) & 0xf0;
break;
}
}
static void tmp421_reset(I2CSlave *i2c);
static void tmp421_write(TMP421State *s)
{
switch (s->pointer) {
case TMP421_CONVERSION_RATE_REG:
s->rate = s->buf[0];
break;
case TMP421_CONFIG_REG_1:
s->config[0] = s->buf[0];
break;
case TMP421_CONFIG_REG_2:
s->config[1] = s->buf[0];
break;
case TMP421_RESET:
tmp421_reset(I2C_SLAVE(s));
break;
}
}
static uint8_t tmp421_rx(I2CSlave *i2c)
{
TMP421State *s = TMP421(i2c);
if (s->len < 2) {
return s->buf[s->len++];
} else {
return 0xff;
}
}
static int tmp421_tx(I2CSlave *i2c, uint8_t data)
{
TMP421State *s = TMP421(i2c);
if (s->len == 0) {
/* first byte is the register pointer for a read or write
* operation */
s->pointer = data;
s->len++;
} else if (s->len == 1) {
/* second byte is the data to write. The device only supports
* one byte writes */
s->buf[0] = data;
tmp421_write(s);
}
return 0;
}
static int tmp421_event(I2CSlave *i2c, enum i2c_event event)
{
TMP421State *s = TMP421(i2c);
if (event == I2C_START_RECV) {
tmp421_read(s);
}
s->len = 0;
return 0;
}
static const VMStateDescription vmstate_tmp421 = {
.name = "TMP421",
.version_id = 0,
.minimum_version_id = 0,
.fields = (VMStateField[]) {
VMSTATE_UINT8(len, TMP421State),
VMSTATE_UINT8_ARRAY(buf, TMP421State, 2),
VMSTATE_UINT8(pointer, TMP421State),
VMSTATE_UINT8_ARRAY(config, TMP421State, 2),
VMSTATE_UINT8(status, TMP421State),
VMSTATE_UINT8(rate, TMP421State),
VMSTATE_INT16_ARRAY(temperature, TMP421State, 4),
VMSTATE_I2C_SLAVE(i2c, TMP421State),
VMSTATE_END_OF_LIST()
}
};
static void tmp421_reset(I2CSlave *i2c)
{
TMP421State *s = TMP421(i2c);
TMP421Class *sc = TMP421_GET_CLASS(s);
memset(s->temperature, 0, sizeof(s->temperature));
s->pointer = 0;
s->config[0] = 0; /* TMP421_CONFIG_RANGE */
/* resistance correction and channel enablement */
switch (sc->dev->model) {
case TMP421_DEVICE_ID:
s->config[1] = 0x1c;
break;
case TMP422_DEVICE_ID:
s->config[1] = 0x3c;
break;
case TMP423_DEVICE_ID:
s->config[1] = 0x7c;
break;
}
s->rate = 0x7; /* 8Hz */
s->status = 0;
}
static void tmp421_realize(DeviceState *dev, Error **errp)
{
TMP421State *s = TMP421(dev);
tmp421_reset(&s->i2c);
}
static void tmp421_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
TMP421Class *sc = TMP421_CLASS(klass);
dc->realize = tmp421_realize;
k->event = tmp421_event;
k->recv = tmp421_rx;
k->send = tmp421_tx;
dc->vmsd = &vmstate_tmp421;
sc->dev = (DeviceInfo *) data;
object_class_property_add(klass, "temperature0", "int",
tmp421_get_temperature,
tmp421_set_temperature, NULL, NULL);
object_class_property_add(klass, "temperature1", "int",
tmp421_get_temperature,
tmp421_set_temperature, NULL, NULL);
object_class_property_add(klass, "temperature2", "int",
tmp421_get_temperature,
tmp421_set_temperature, NULL, NULL);
object_class_property_add(klass, "temperature3", "int",
tmp421_get_temperature,
tmp421_set_temperature, NULL, NULL);
}
static const TypeInfo tmp421_info = {
.name = TYPE_TMP421,
.parent = TYPE_I2C_SLAVE,
.instance_size = sizeof(TMP421State),
.class_size = sizeof(TMP421Class),
.abstract = true,
};
static void tmp421_register_types(void)
{
int i;
type_register_static(&tmp421_info);
for (i = 0; i < ARRAY_SIZE(devices); ++i) {
TypeInfo ti = {
.name = devices[i].name,
.parent = TYPE_TMP421,
.class_init = tmp421_class_init,
.class_data = (void *) &devices[i],
};
type_register(&ti);
}
}
type_init(tmp421_register_types)