[qemu.git] / hw / misc / tmp421.c

/*
 * 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 <[email protected]>
 *
 * 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/hw.h"
#include "hw/i2c/i2c.h"
#include "qapi/error.h"
#include "qapi/visitor.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" },
};

typedef 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;

} TMP421State;

typedef struct TMP421Class {
    I2CSlaveClass parent_class;
    DeviceInfo *dev;
} TMP421Class;

#define TYPE_TMP421 "tmp421-generic"
#define TMP421(obj) OBJECT_CHECK(TMP421State, (obj), TYPE_TMP421)

#define TMP421_CLASS(klass) \
     OBJECT_CLASS_CHECK(TMP421Class, (klass), TYPE_TMP421)
#define TMP421_GET_CLASS(obj) \
     OBJECT_GET_CLASS(TMP421Class, (obj), TYPE_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: %m", name);
        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);
    Error *local_err = NULL;
    int64_t temp;
    bool ext_range = (s->config[0] & TMP421_CONFIG_RANGE);
    int offset = ext_range * 64 * 256;
    int tempid;

    visit_type_int(v, name, &temp, &local_err);
    if (local_err) {
        error_propagate(errp, local_err);
        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: %m", name);
        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_initfn(Object *obj)
{
    object_property_add(obj, "temperature0", "int",
                        tmp421_get_temperature,
                        tmp421_set_temperature, NULL, NULL, NULL);
    object_property_add(obj, "temperature1", "int",
                        tmp421_get_temperature,
                        tmp421_set_temperature, NULL, NULL, NULL);
    object_property_add(obj, "temperature2", "int",
                        tmp421_get_temperature,
                        tmp421_set_temperature, NULL, NULL, NULL);
    object_property_add(obj, "temperature3", "int",
                        tmp421_get_temperature,
                        tmp421_set_temperature, NULL, NULL, NULL);
}

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;
}

static const TypeInfo tmp421_info = {
    .name          = TYPE_TMP421,
    .parent        = TYPE_I2C_SLAVE,
    .instance_size = sizeof(TMP421State),
    .class_size    = sizeof(TMP421Class),
    .instance_init = tmp421_initfn,
    .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)
Commit	Line	Data
fe3874b6 CLG	1	/*
	2	* Texas Instruments TMP421 temperature sensor.
	3	*
	4	* Copyright (c) 2016 IBM Corporation.
	5	*
	6	* Largely inspired by :
	7	*
	8	* Texas Instruments TMP105 temperature sensor.
	9	*
	10	* Copyright (C) 2008 Nokia Corporation
	11	* Written by Andrzej Zaborowski <[email protected]>
	12	*
	13	* This program is free software; you can redistribute it and/or
	14	* modify it under the terms of the GNU General Public License as
	15	* published by the Free Software Foundation; either version 2 or
	16	* (at your option) version 3 of the License.
	17	*
	18	* This program is distributed in the hope that it will be useful,
	19	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	20	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	21	* GNU General Public License for more details.
	22	*
	23	* You should have received a copy of the GNU General Public License along
	24	* with this program; if not, see <http://www.gnu.org/licenses/>.
	25	*/
	26
	27	#include "qemu/osdep.h"
	28	#include "hw/hw.h"
	29	#include "hw/i2c/i2c.h"
	30	#include "qapi/error.h"
	31	#include "qapi/visitor.h"
	32
	33	/* Manufacturer / Device ID's */
	34	#define TMP421_MANUFACTURER_ID 0x55
	35	#define TMP421_DEVICE_ID 0x21
	36	#define TMP422_DEVICE_ID 0x22
	37	#define TMP423_DEVICE_ID 0x23
	38
	39	typedef struct DeviceInfo {
	40	int model;
	41	const char *name;
	42	} DeviceInfo;
	43
	44	static const DeviceInfo devices[] = {
	45	{ TMP421_DEVICE_ID, "tmp421" },
	46	{ TMP422_DEVICE_ID, "tmp422" },
	47	{ TMP423_DEVICE_ID, "tmp423" },
	48	};
	49
	50	typedef struct TMP421State {
	51	/< private >/
	52	I2CSlave i2c;
	53	/< public >/
	54
	55	int16_t temperature[4];
	56
	57	uint8_t status;
	58	uint8_t config[2];
	59	uint8_t rate;
	60
	61	uint8_t len;
	62	uint8_t buf[2];
	63	uint8_t pointer;
	64
65	} TMP421State;
66
67	typedef struct TMP421Class {
68	I2CSlaveClass parent_class;
69	DeviceInfo *dev;
70	} TMP421Class;
71
72	#define TYPE_TMP421 "tmp421-generic"
73	#define TMP421(obj) OBJECT_CHECK(TMP421State, (obj), TYPE_TMP421)
74
75	#define TMP421_CLASS(klass) \
76	OBJECT_CLASS_CHECK(TMP421Class, (klass), TYPE_TMP421)
77	#define TMP421_GET_CLASS(obj) \
78	OBJECT_GET_CLASS(TMP421Class, (obj), TYPE_TMP421)
79
80	/* the TMP421 registers */
81	#define TMP421_STATUS_REG 0x08
82	#define TMP421_STATUS_BUSY (1 << 7)
83	#define TMP421_CONFIG_REG_1 0x09
84	#define TMP421_CONFIG_RANGE (1 << 2)
85	#define TMP421_CONFIG_SHUTDOWN (1 << 6)
86	#define TMP421_CONFIG_REG_2 0x0A
87	#define TMP421_CONFIG_RC (1 << 2)
88	#define TMP421_CONFIG_LEN (1 << 3)
89	#define TMP421_CONFIG_REN (1 << 4)
90	#define TMP421_CONFIG_REN2 (1 << 5)
91	#define TMP421_CONFIG_REN3 (1 << 6)
92
93	#define TMP421_CONVERSION_RATE_REG 0x0B
94	#define TMP421_ONE_SHOT 0x0F
95
96	#define TMP421_RESET 0xFC
97	#define TMP421_MANUFACTURER_ID_REG 0xFE
98	#define TMP421_DEVICE_ID_REG 0xFF
99
100	#define TMP421_TEMP_MSB0 0x00
101	#define TMP421_TEMP_MSB1 0x01
102	#define TMP421_TEMP_MSB2 0x02
103	#define TMP421_TEMP_MSB3 0x03
104	#define TMP421_TEMP_LSB0 0x10
105	#define TMP421_TEMP_LSB1 0x11
106	#define TMP421_TEMP_LSB2 0x12
107	#define TMP421_TEMP_LSB3 0x13
108
109	static const int32_t mins[2] = { -40000, -55000 };
110	static const int32_t maxs[2] = { 127000, 150000 };
111
112	static void tmp421_get_temperature(Object obj, Visitor v, const char *name,
113	void opaque, Error *errp)
114	{
115	TMP421State *s = TMP421(obj);
116	bool ext_range = (s->config[0] & TMP421_CONFIG_RANGE);
117	int offset = ext_range * 64 * 256;
118	int64_t value;
119	int tempid;
120
121	if (sscanf(name, "temperature%d", &tempid) != 1) {
122	error_setg(errp, "error reading %s: %m", name);
123	return;
124	}
125
126	if (tempid >= 4 \|\| tempid < 0) {
127	error_setg(errp, "error reading %s", name);
128	return;
129	}
130
131	value = ((s->temperature[tempid] - offset) * 1000 + 128) / 256;
132
133	visit_type_int(v, name, &value, errp);
134	}
135
136	/* Units are 0.001 centigrades relative to 0 C. s->temperature is 8.8
137	* fixed point, so units are 1/256 centigrades. A simple ratio will do.
138	*/
139	static void tmp421_set_temperature(Object obj, Visitor v, const char *name,
140	void opaque, Error *errp)
141	{
142	TMP421State *s = TMP421(obj);
143	Error *local_err = NULL;
144	int64_t temp;
145	bool ext_range = (s->config[0] & TMP421_CONFIG_RANGE);
146	int offset = ext_range * 64 * 256;
147	int tempid;
148
149	visit_type_int(v, name, &temp, &local_err);
150	if (local_err) {
151	error_propagate(errp, local_err);
152	return;
153	}
154
155	if (temp >= maxs[ext_range] \|\| temp < mins[ext_range]) {
3381466d	156	error_setg(errp, "value %" PRId64 ".%03" PRIu64 " C is out of range",
fe3874b6 CLG	157	temp / 1000, temp % 1000);
	158	return;
	159	}
	160
	161	if (sscanf(name, "temperature%d", &tempid) != 1) {
	162	error_setg(errp, "error reading %s: %m", name);
	163	return;
	164	}
	165
	166	if (tempid >= 4 \|\| tempid < 0) {
	167	error_setg(errp, "error reading %s", name);
	168	return;
	169	}
	170
	171	s->temperature[tempid] = (int16_t) ((temp * 256 - 128) / 1000) + offset;
	172	}
	173
	174	static void tmp421_read(TMP421State *s)
	175	{
	176	TMP421Class *sc = TMP421_GET_CLASS(s);
	177
	178	s->len = 0;
	179
	180	switch (s->pointer) {
	181	case TMP421_MANUFACTURER_ID_REG:
	182	s->buf[s->len++] = TMP421_MANUFACTURER_ID;
	183	break;
	184	case TMP421_DEVICE_ID_REG:
	185	s->buf[s->len++] = sc->dev->model;
	186	break;
	187	case TMP421_CONFIG_REG_1:
	188	s->buf[s->len++] = s->config[0];
	189	break;
	190	case TMP421_CONFIG_REG_2:
	191	s->buf[s->len++] = s->config[1];
	192	break;
	193	case TMP421_CONVERSION_RATE_REG:
	194	s->buf[s->len++] = s->rate;
	195	break;
	196	case TMP421_STATUS_REG:
	197	s->buf[s->len++] = s->status;
	198	break;
	199
	200	/* FIXME: check for channel enablement in config registers */
	201	case TMP421_TEMP_MSB0:
	202	s->buf[s->len++] = (((uint16_t) s->temperature[0]) >> 8);
	203	s->buf[s->len++] = (((uint16_t) s->temperature[0]) >> 0) & 0xf0;
	204	break;
	205	case TMP421_TEMP_MSB1:
	206	s->buf[s->len++] = (((uint16_t) s->temperature[1]) >> 8);
	207	s->buf[s->len++] = (((uint16_t) s->temperature[1]) >> 0) & 0xf0;
	208	break;
	209	case TMP421_TEMP_MSB2:
	210	s->buf[s->len++] = (((uint16_t) s->temperature[2]) >> 8);
	211	s->buf[s->len++] = (((uint16_t) s->temperature[2]) >> 0) & 0xf0;
	212	break;
	213	case TMP421_TEMP_MSB3:
	214	s->buf[s->len++] = (((uint16_t) s->temperature[3]) >> 8);
	215	s->buf[s->len++] = (((uint16_t) s->temperature[3]) >> 0) & 0xf0;
	216	break;
	217	case TMP421_TEMP_LSB0:
	218	s->buf[s->len++] = (((uint16_t) s->temperature[0]) >> 0) & 0xf0;
	219	break;
	220	case TMP421_TEMP_LSB1:
221	s->buf[s->len++] = (((uint16_t) s->temperature[1]) >> 0) & 0xf0;
222	break;
223	case TMP421_TEMP_LSB2:
224	s->buf[s->len++] = (((uint16_t) s->temperature[2]) >> 0) & 0xf0;
225	break;
226	case TMP421_TEMP_LSB3:
227	s->buf[s->len++] = (((uint16_t) s->temperature[3]) >> 0) & 0xf0;
228	break;
229	}
230	}
231
232	static void tmp421_reset(I2CSlave *i2c);
233
234	static void tmp421_write(TMP421State *s)
235	{
236	switch (s->pointer) {
237	case TMP421_CONVERSION_RATE_REG:
238	s->rate = s->buf[0];
239	break;
240	case TMP421_CONFIG_REG_1:
241	s->config[0] = s->buf[0];
242	break;
243	case TMP421_CONFIG_REG_2:
244	s->config[1] = s->buf[0];
245	break;
246	case TMP421_RESET:
247	tmp421_reset(I2C_SLAVE(s));
248	break;
249	}
250	}
251
2ac4c5f4	252	static uint8_t tmp421_rx(I2CSlave *i2c)
fe3874b6 CLG	253	{
	254	TMP421State *s = TMP421(i2c);
	255
	256	if (s->len < 2) {
	257	return s->buf[s->len++];
	258	} else {
	259	return 0xff;
	260	}
	261	}
	262
	263	static int tmp421_tx(I2CSlave *i2c, uint8_t data)
	264	{
	265	TMP421State *s = TMP421(i2c);
	266
	267	if (s->len == 0) {
	268	/* first byte is the register pointer for a read or write
	269	* operation */
	270	s->pointer = data;
	271	s->len++;
	272	} else if (s->len == 1) {
	273	/* second byte is the data to write. The device only supports
	274	* one byte writes */
	275	s->buf[0] = data;
	276	tmp421_write(s);
	277	}
	278
	279	return 0;
	280	}
	281
	282	static int tmp421_event(I2CSlave *i2c, enum i2c_event event)
	283	{
	284	TMP421State *s = TMP421(i2c);
	285
	286	if (event == I2C_START_RECV) {
	287	tmp421_read(s);
	288	}
	289
	290	s->len = 0;
	291	return 0;
	292	}
	293
	294	static const VMStateDescription vmstate_tmp421 = {
	295	.name = "TMP421",
	296	.version_id = 0,
	297	.minimum_version_id = 0,
	298	.fields = (VMStateField[]) {
	299	VMSTATE_UINT8(len, TMP421State),
	300	VMSTATE_UINT8_ARRAY(buf, TMP421State, 2),
	301	VMSTATE_UINT8(pointer, TMP421State),
	302	VMSTATE_UINT8_ARRAY(config, TMP421State, 2),
	303	VMSTATE_UINT8(status, TMP421State),
	304	VMSTATE_UINT8(rate, TMP421State),
	305	VMSTATE_INT16_ARRAY(temperature, TMP421State, 4),
	306	VMSTATE_I2C_SLAVE(i2c, TMP421State),
	307	VMSTATE_END_OF_LIST()
	308	}
	309	};
	310
	311	static void tmp421_reset(I2CSlave *i2c)
	312	{
	313	TMP421State *s = TMP421(i2c);
	314	TMP421Class *sc = TMP421_GET_CLASS(s);
	315
	316	memset(s->temperature, 0, sizeof(s->temperature));
317	s->pointer = 0;
318
319	s->config[0] = 0; /* TMP421_CONFIG_RANGE */
320
321	/* resistance correction and channel enablement */
322	switch (sc->dev->model) {
323	case TMP421_DEVICE_ID:
324	s->config[1] = 0x1c;
325	break;
326	case TMP422_DEVICE_ID:
327	s->config[1] = 0x3c;
328	break;
329	case TMP423_DEVICE_ID:
330	s->config[1] = 0x7c;
331	break;
332	}
333
334	s->rate = 0x7; /* 8Hz */
335	s->status = 0;
336	}
337
c8c9e103	338	static void tmp421_realize(DeviceState dev, Error *errp)
fe3874b6	339	{
c8c9e103	340	TMP421State *s = TMP421(dev);
fe3874b6 CLG	341
fe3874b6 CLG	342	tmp421_reset(&s->i2c);
fe3874b6 CLG	343	}
	344
	345	static void tmp421_initfn(Object *obj)
	346	{
	347	object_property_add(obj, "temperature0", "int",
	348	tmp421_get_temperature,
	349	tmp421_set_temperature, NULL, NULL, NULL);
	350	object_property_add(obj, "temperature1", "int",
	351	tmp421_get_temperature,
	352	tmp421_set_temperature, NULL, NULL, NULL);
	353	object_property_add(obj, "temperature2", "int",
	354	tmp421_get_temperature,
	355	tmp421_set_temperature, NULL, NULL, NULL);
	356	object_property_add(obj, "temperature3", "int",
	357	tmp421_get_temperature,
	358	tmp421_set_temperature, NULL, NULL, NULL);
	359	}
	360
	361	static void tmp421_class_init(ObjectClass klass, void data)
	362	{
	363	DeviceClass *dc = DEVICE_CLASS(klass);
	364	I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
	365	TMP421Class *sc = TMP421_CLASS(klass);
	366
c8c9e103	367	dc->realize = tmp421_realize;
fe3874b6 CLG	368	k->event = tmp421_event;
	369	k->recv = tmp421_rx;
	370	k->send = tmp421_tx;
	371	dc->vmsd = &vmstate_tmp421;
	372	sc->dev = (DeviceInfo *) data;
	373	}
	374
	375	static const TypeInfo tmp421_info = {
	376	.name = TYPE_TMP421,
	377	.parent = TYPE_I2C_SLAVE,
	378	.instance_size = sizeof(TMP421State),
	379	.class_size = sizeof(TMP421Class),
	380	.instance_init = tmp421_initfn,
	381	.abstract = true,
	382	};
	383
	384	static void tmp421_register_types(void)
	385	{
	386	int i;
	387
	388	type_register_static(&tmp421_info);
	389	for (i = 0; i < ARRAY_SIZE(devices); ++i) {
	390	TypeInfo ti = {
	391	.name = devices[i].name,
	392	.parent = TYPE_TMP421,
	393	.class_init = tmp421_class_init,
	394	.class_data = (void *) &devices[i],
	395	};
	396	type_register(&ti);
	397	}
	398	}
	399
	400	type_init(tmp421_register_types)