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[PATCH 1/2] hw/misc: Add Infineon DPS310 sensor model
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From: |
Joel Stanley |
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Subject: |
[PATCH 1/2] hw/misc: Add Infineon DPS310 sensor model |
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Date: |
Wed, 9 Jun 2021 20:28:01 +0930 |
This contains some hardcoded register values that were obtained from the
hardware after reading the temperature.
It does enough to test the Linux kernel driver.
Signed-off-by: Joel Stanley <joel@jms.id.au>
---
hw/misc/dps310.c | 357 ++++++++++++++++++++++++++++++++++++++++++++
hw/arm/Kconfig | 1 +
hw/misc/Kconfig | 4 +
hw/misc/meson.build | 1 +
4 files changed, 363 insertions(+)
create mode 100644 hw/misc/dps310.c
diff --git a/hw/misc/dps310.c b/hw/misc/dps310.c
new file mode 100644
index 000000000000..1fe1a1a645f2
--- /dev/null
+++ b/hw/misc/dps310.c
@@ -0,0 +1,357 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2017 Joel Stanley <joel@jms.id.au>, IBM Corporation
+ *
+ * Infineon DPS310 temperature and himidity sensor
+ *
+ *
https://www.infineon.com/cms/en/product/sensor/pressure-sensors/pressure-sensors-for-iot/dps310/
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/log.h"
+#include "hw/hw.h"
+#include "hw/i2c/i2c.h"
+#include "qapi/error.h"
+#include "qapi/visitor.h"
+#include "migration/vmstate.h"
+
+#define NUM_REGISTERS 0x32
+
+typedef struct DPS310State {
+ /*< private >*/
+ I2CSlave i2c;
+
+ /*< public >*/
+ uint8_t regs[NUM_REGISTERS];
+
+ int16_t pressure, temperature;
+
+ uint8_t len;
+ uint8_t buf[2];
+ uint8_t pointer;
+
+} DPS310State;
+
+typedef struct DPS310Class {
+ I2CSlaveClass parent_class;
+} DPS310Class;
+
+#define TYPE_DPS310 "dps310"
+#define DPS310(obj) OBJECT_CHECK(DPS310State, (obj), TYPE_DPS310)
+
+#define DPS310_CLASS(klass) \
+ OBJECT_CLASS_CHECK(DPS310Class, (klass), TYPE_DPS310)
+#define DPS310_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(DPS310Class, (obj), TYPE_DPS310)
+
+#define DPS310_PRS_B2 0x00
+#define DPS310_PRS_B1 0x01
+#define DPS310_PRS_B0 0x02
+#define DPS310_TMP_B2 0x03
+#define DPS310_TMP_B1 0x04
+#define DPS310_TMP_B0 0x05
+#define DPS310_PRS_CFG 0x06
+#define DPS310_TMP_CFG 0x07
+#define DPS310_TMP_RATE_BITS GENMASK(6, 4)
+#define DPS310_MEAS_CFG 0x08
+#define DPS310_MEAS_CTRL_BITS GENMASK(2, 0)
+#define DPS310_PRESSURE_EN BIT(0)
+#define DPS310_TEMP_EN BIT(1)
+#define DPS310_BACKGROUND BIT(2)
+#define DPS310_PRS_RDY BIT(4)
+#define DPS310_TMP_RDY BIT(5)
+#define DPS310_SENSOR_RDY BIT(6)
+#define DPS310_COEF_RDY BIT(7)
+#define DPS310_CFG_REG 0x09
+#define DPS310_RESET 0x0c
+#define DPS310_RESET_MAGIC (BIT(0) | BIT(3))
+#define DPS310_COEF_BASE 0x10
+#define DPS310_COEF_LAST 0x21
+#define DPS310_COEF_SRC 0x28
+
+static void dps310_reset(DeviceState *dev)
+{
+ DPS310State *s = DPS310(dev);
+
+ memset(s->regs, 0, sizeof(s->regs));
+ s->pointer = 0;
+
+ s->regs[0x00] = 0xfe;
+ s->regs[0x01] = 0x2f;
+ s->regs[0x02] = 0xee;
+ s->regs[0x03] = 0x02;
+ s->regs[0x04] = 0x69;
+ s->regs[0x05] = 0xa6;
+ s->regs[0x06] = 0x00;
+ s->regs[0x07] = 0x80;
+ s->regs[0x08] = 0xc7;
+
+ s->regs[0x0d] = 0x10;
+ s->regs[0x0e] = 0x00;
+ s->regs[0x0f] = 0x00;
+ s->regs[0x10] = 0x0e;
+ s->regs[0x11] = 0x1e;
+ s->regs[0x12] = 0xdd;
+ s->regs[0x13] = 0x13;
+ s->regs[0x14] = 0xca;
+ s->regs[0x15] = 0x5f;
+ s->regs[0x16] = 0x21;
+ s->regs[0x17] = 0x52;
+ s->regs[0x18] = 0xf9;
+ s->regs[0x19] = 0xc6;
+ s->regs[0x1a] = 0x04;
+ s->regs[0x1b] = 0xd1;
+ s->regs[0x1c] = 0xdb;
+ s->regs[0x1d] = 0x47;
+ s->regs[0x1e] = 0x00;
+ s->regs[0x1f] = 0x5b;
+ s->regs[0x20] = 0xfb;
+ s->regs[0x21] = 0x3a;
+ s->regs[0x22] = 0x00;
+ s->regs[0x23] = 0x00;
+ s->regs[0x24] = 0x20;
+ s->regs[0x25] = 0x49;
+ s->regs[0x26] = 0x4e;
+ s->regs[0x27] = 0xa5;
+ s->regs[0x28] = 0x90;
+
+ s->regs[0x30] = 0x60;
+ s->regs[0x31] = 0x15;
+
+ /* TODO: assert these after some timeout ? */
+ s->regs[DPS310_MEAS_CFG] = DPS310_COEF_RDY | DPS310_SENSOR_RDY
+ | DPS310_TMP_RDY | DPS310_PRS_RDY;
+}
+
+static void dps310_get_pressure(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ DPS310State *s = DPS310(obj);
+ int64_t value;
+
+ /* TODO */
+ value = s->pressure;
+
+ visit_type_int(v, name, &value, errp);
+}
+
+static void dps310_get_temperature(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ DPS310State *s = DPS310(obj);
+ int64_t value;
+
+ /* TODO */
+ value = s->temperature;
+
+ visit_type_int(v, name, &value, errp);
+}
+
+static void dps310_set_temperature(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ DPS310State *s = DPS310(obj);
+ Error *local_err = NULL;
+ int64_t temp;
+
+ visit_type_int(v, name, &temp, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+
+ /* TODO */
+ if (temp >= 200 || temp < -100) {
+ error_setg(errp, "value %" PRId64 ".%03" PRIu64 " °C is out of range",
+ temp / 1000, temp % 1000);
+ return;
+ }
+
+ s->temperature = temp;
+}
+
+static void dps310_set_pressure(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ DPS310State *s = DPS310(obj);
+ Error *local_err = NULL;
+ int64_t pres;
+
+ visit_type_int(v, name, &pres, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+
+ /* TODO */
+ if (pres >= 200 || pres < -100) {
+ error_setg(errp, "value %" PRId64 ".%03" PRIu64 " is out of range",
+ pres / 1000, pres % 1000);
+ return;
+ }
+
+ s->pressure = pres;
+}
+
+static void dps310_read(DPS310State *s)
+{
+ /* Test should be >=, but we want to include register 0x32 */
+ if (s->pointer > sizeof(s->regs)) {
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: register 0x%02x out of bounds\n",
+ __func__, s->pointer);
+ return;
+ }
+
+ s->len = 0;
+
+ switch (s->pointer) {
+ case DPS310_PRS_B2:
+ case DPS310_PRS_B1:
+ case DPS310_PRS_B0:
+ case DPS310_TMP_B2:
+ case DPS310_TMP_B1:
+ case DPS310_TMP_B0:
+ case DPS310_PRS_CFG:
+ case DPS310_TMP_CFG:
+ case DPS310_MEAS_CFG:
+ case DPS310_CFG_REG:
+ case DPS310_COEF_BASE...DPS310_COEF_LAST:
+ case DPS310_COEF_SRC:
+ s->buf[s->len++] = s->regs[s->pointer];
+ break;
+ case 0x32:
+ /* Undocumented register to indicate workaround not required */
+ s->buf[s->len++] = 0x2;
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP, "%s: register 0x%02x unimplemented\n",
+ __func__, s->pointer);
+ return;
+ }
+}
+
+static void dps310_write(DPS310State *s)
+{
+ if (s->pointer >= sizeof(s->regs)) {
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: register %d out of bounds\n",
+ __func__, s->pointer);
+ return;
+ }
+
+ switch (s->pointer) {
+ case DPS310_RESET:
+ if (s->buf[0] == DPS310_RESET_MAGIC) {
+ dps310_reset(DEVICE(s));
+ }
+ break;
+ case DPS310_PRS_CFG:
+ case DPS310_TMP_CFG:
+ case DPS310_MEAS_CFG:
+ case DPS310_CFG_REG:
+ s->regs[s->pointer] = s->buf[0];
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP, "%s: register 0x%02x unimplemented\n",
+ __func__, s->pointer);
+ return;
+ }
+}
+
+static uint8_t dps310_rx(I2CSlave *i2c)
+{
+ DPS310State *s = DPS310(i2c);
+
+ if (s->len < 2) {
+ return s->buf[s->len++];
+ } else {
+ return 0xff;
+ }
+}
+
+static int dps310_tx(I2CSlave *i2c, uint8_t data)
+{
+ DPS310State *s = DPS310(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;
+ dps310_write(s);
+ }
+
+ return 0;
+}
+
+static int dps310_event(I2CSlave *i2c, enum i2c_event event)
+{
+ DPS310State *s = DPS310(i2c);
+
+ if (event == I2C_START_RECV) {
+ dps310_read(s);
+ }
+
+ s->len = 0;
+ return 0;
+}
+
+static const VMStateDescription vmstate_dps310 = {
+ .name = "DPS310",
+ .version_id = 0,
+ .minimum_version_id = 0,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT8(len, DPS310State),
+ VMSTATE_UINT8_ARRAY(buf, DPS310State, 2),
+ VMSTATE_UINT8_ARRAY(regs, DPS310State, NUM_REGISTERS),
+ VMSTATE_UINT8(pointer, DPS310State),
+ VMSTATE_INT16(temperature, DPS310State),
+ VMSTATE_INT16(pressure, DPS310State),
+ VMSTATE_I2C_SLAVE(i2c, DPS310State),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void dps310_initfn(Object *obj)
+{
+ object_property_add(obj, "temperature", "int",
+ dps310_get_temperature,
+ dps310_set_temperature, NULL, NULL);
+ object_property_add(obj, "pressure", "int",
+ dps310_get_pressure,
+ dps310_set_pressure, NULL, NULL);
+}
+
+static void dps310_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
+
+ k->event = dps310_event;
+ k->recv = dps310_rx;
+ k->send = dps310_tx;
+ dc->reset = dps310_reset;
+ dc->vmsd = &vmstate_dps310;
+}
+
+static const TypeInfo dps310_info = {
+ .name = TYPE_DPS310,
+ .parent = TYPE_I2C_SLAVE,
+ .instance_size = sizeof(DPS310State),
+ .instance_init = dps310_initfn,
+ .class_init = dps310_class_init,
+};
+
+static void dps310_register_types(void)
+{
+ type_register_static(&dps310_info);
+}
+
+type_init(dps310_register_types)
diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
index 67723d9ea6a8..62925845ebc1 100644
--- a/hw/arm/Kconfig
+++ b/hw/arm/Kconfig
@@ -410,6 +410,7 @@ config ASPEED_SOC
select DS1338
select FTGMAC100
select I2C
+ select DPS310
select PCA9552
select SERIAL
select SMBUS_EEPROM
diff --git a/hw/misc/Kconfig b/hw/misc/Kconfig
index c71ed2582046..016e34790e4f 100644
--- a/hw/misc/Kconfig
+++ b/hw/misc/Kconfig
@@ -49,6 +49,10 @@ config EDU
default y if TEST_DEVICES
depends on PCI && MSI_NONBROKEN
+config DPS310
+ bool
+ depends on I2C
+
config PCA9552
bool
depends on I2C
diff --git a/hw/misc/meson.build b/hw/misc/meson.build
index 66e1648533e0..779d8b1582d3 100644
--- a/hw/misc/meson.build
+++ b/hw/misc/meson.build
@@ -1,4 +1,5 @@
softmmu_ss.add(when: 'CONFIG_APPLESMC', if_true: files('applesmc.c'))
+softmmu_ss.add(when: 'CONFIG_DPS310', if_true: files('dps310.c'))
softmmu_ss.add(when: 'CONFIG_EDU', if_true: files('edu.c'))
softmmu_ss.add(when: 'CONFIG_FW_CFG_DMA', if_true: files('vmcoreinfo.c'))
softmmu_ss.add(when: 'CONFIG_ISA_DEBUG', if_true: files('debugexit.c'))
--
2.30.2