[mirror_qemu.git] / hw / sensor / emc141x.c

/*
 * 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)
Commit	Line	Data
5e623f2b JW	1	/*
	2	* SMSC EMC141X temperature sensor.
	3	*
	4	* Copyright (c) 2020 Bytedance Corporation
	5	* Written by John Wang <wangzhiqiang.bj@bytedance.com>
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License as
	9	* published by the Free Software Foundation; either version 2 or
	10	* (at your option) version 3 of the License.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License along
	18	* with this program; if not, see <http://www.gnu.org/licenses/>.
	19	*/
	20
	21	#include "qemu/osdep.h"
	22	#include "hw/i2c/i2c.h"
	23	#include "migration/vmstate.h"
	24	#include "qapi/error.h"
	25	#include "qapi/visitor.h"
	26	#include "qemu/module.h"
	27	#include "qom/object.h"
5e9ae4b1	28	#include "hw/sensor/emc141x_regs.h"
5e623f2b JW	29
	30	#define SENSORS_COUNT_MAX 4
	31
	32	struct EMC141XState {
	33	I2CSlave parent_obj;
	34	struct {
	35	uint8_t raw_temp_min;
	36	uint8_t raw_temp_current;
	37	uint8_t raw_temp_max;
	38	} sensor[SENSORS_COUNT_MAX];
	39	uint8_t len;
	40	uint8_t data;
	41	uint8_t pointer;
	42	};
	43
	44	struct EMC141XClass {
	45	I2CSlaveClass parent_class;
	46	uint8_t model;
	47	unsigned sensors_count;
	48	};
	49
	50	#define TYPE_EMC141X "emc141x"
	51	OBJECT_DECLARE_TYPE(EMC141XState, EMC141XClass, EMC141X)
	52
	53	static void emc141x_get_temperature(Object obj, Visitor v, const char *name,
	54	void opaque, Error *errp)
	55	{
	56	EMC141XState *s = EMC141X(obj);
	57	EMC141XClass *sc = EMC141X_GET_CLASS(s);
	58	int64_t value;
	59	unsigned tempid;
	60
	61	if (sscanf(name, "temperature%u", &tempid) != 1) {
	62	error_setg(errp, "error reading %s: %s", name, g_strerror(errno));
	63	return;
	64	}
	65
	66	if (tempid >= sc->sensors_count) {
	67	error_setg(errp, "error reading %s", name);
	68	return;
	69	}
	70
	71	value = s->sensor[tempid].raw_temp_current * 1000;
	72
	73	visit_type_int(v, name, &value, errp);
	74	}
	75
	76	static void emc141x_set_temperature(Object obj, Visitor v, const char *name,
	77	void opaque, Error *errp)
	78	{
	79	EMC141XState *s = EMC141X(obj);
	80	EMC141XClass *sc = EMC141X_GET_CLASS(s);
	81	int64_t temp;
	82	unsigned tempid;
	83
	84	if (!visit_type_int(v, name, &temp, errp)) {
	85	return;
	86	}
	87
	88	if (sscanf(name, "temperature%u", &tempid) != 1) {
	89	error_setg(errp, "error reading %s: %s", name, g_strerror(errno));
	90	return;
	91	}
	92
93	if (tempid >= sc->sensors_count) {
94	error_setg(errp, "error reading %s", name);
95	return;
96	}
97
98	s->sensor[tempid].raw_temp_current = temp / 1000;
99	}
100
101	static void emc141x_read(EMC141XState *s)
102	{
103	EMC141XClass *sc = EMC141X_GET_CLASS(s);
104	switch (s->pointer) {
105	case EMC141X_DEVICE_ID:
106	s->data = sc->model;
107	break;
108	case EMC141X_MANUFACTURER_ID:
109	s->data = MANUFACTURER_ID;
110	break;
111	case EMC141X_REVISION:
112	s->data = REVISION;
113	break;
114	case EMC141X_TEMP_HIGH0:
115	s->data = s->sensor[0].raw_temp_current;
116	break;
117	case EMC141X_TEMP_HIGH1:
118	s->data = s->sensor[1].raw_temp_current;
119	break;
120	case EMC141X_TEMP_HIGH2:
121	s->data = s->sensor[2].raw_temp_current;
122	break;
123	case EMC141X_TEMP_HIGH3:
124	s->data = s->sensor[3].raw_temp_current;
125	break;
126	case EMC141X_TEMP_MAX_HIGH0:
127	s->data = s->sensor[0].raw_temp_max;
128	break;
129	case EMC141X_TEMP_MAX_HIGH1:
130	s->data = s->sensor[1].raw_temp_max;
131	break;
132	case EMC141X_TEMP_MAX_HIGH2:
133	s->data = s->sensor[2].raw_temp_max;
134	break;
135	case EMC141X_TEMP_MAX_HIGH3:
136	s->data = s->sensor[3].raw_temp_max;
137	break;
138	case EMC141X_TEMP_MIN_HIGH0:
139	s->data = s->sensor[0].raw_temp_min;
140	break;
141	case EMC141X_TEMP_MIN_HIGH1:
142	s->data = s->sensor[1].raw_temp_min;
143	break;
144	case EMC141X_TEMP_MIN_HIGH2:
145	s->data = s->sensor[2].raw_temp_min;
146	break;
147	case EMC141X_TEMP_MIN_HIGH3:
148	s->data = s->sensor[3].raw_temp_min;
149	break;
150	default:
151	s->data = 0;
152	}
153	}
154
155	static void emc141x_write(EMC141XState *s)
156	{
157	switch (s->pointer) {
158	case EMC141X_TEMP_MAX_HIGH0:
159	s->sensor[0].raw_temp_max = s->data;
160	break;
161	case EMC141X_TEMP_MAX_HIGH1:
162	s->sensor[1].raw_temp_max = s->data;
163	break;
164	case EMC141X_TEMP_MAX_HIGH2:
165	s->sensor[2].raw_temp_max = s->data;
166	break;
167	case EMC141X_TEMP_MAX_HIGH3:
168	s->sensor[3].raw_temp_max = s->data;
169	break;
170	case EMC141X_TEMP_MIN_HIGH0:
171	s->sensor[0].raw_temp_min = s->data;
172	break;
173	case EMC141X_TEMP_MIN_HIGH1:
174	s->sensor[1].raw_temp_min = s->data;
175	break;
176	case EMC141X_TEMP_MIN_HIGH2:
177	s->sensor[2].raw_temp_min = s->data;
178	break;
179	case EMC141X_TEMP_MIN_HIGH3:
180	s->sensor[3].raw_temp_min = s->data;
181	break;
182	default:
183	s->data = 0;
184	}
185	}
186
187	static uint8_t emc141x_rx(I2CSlave *i2c)
188	{
189	EMC141XState *s = EMC141X(i2c);
190
191	if (s->len == 0) {
192	s->len++;
193	return s->data;
194	} else {
195	return 0xff;
196	}
197	}
198
199	static int emc141x_tx(I2CSlave *i2c, uint8_t data)
200	{
201	EMC141XState *s = EMC141X(i2c);
202
203	if (s->len == 0) {
204	/* first byte is the reg pointer */
205	s->pointer = data;
206	s->len++;
207	} else if (s->len == 1) {
208	s->data = data;
209	emc141x_write(s);
210	}
211
212	return 0;
213	}
214
215	static int emc141x_event(I2CSlave *i2c, enum i2c_event event)
216	{
217	EMC141XState *s = EMC141X(i2c);
218
219	if (event == I2C_START_RECV) {
220	emc141x_read(s);
221	}
222
223	s->len = 0;
224	return 0;
225	}
226
227	static const VMStateDescription vmstate_emc141x = {
228	.name = "EMC141X",
229	.version_id = 0,
230	.minimum_version_id = 0,
231	.fields = (VMStateField[]) {
232	VMSTATE_UINT8(len, EMC141XState),
233	VMSTATE_UINT8(data, EMC141XState),
234	VMSTATE_UINT8(pointer, EMC141XState),
235	VMSTATE_I2C_SLAVE(parent_obj, EMC141XState),
236	VMSTATE_END_OF_LIST()
237	}
238	};
239
240	static void emc141x_reset(DeviceState *dev)
241	{
242	EMC141XState *s = EMC141X(dev);
243	int i;
244
245	for (i = 0; i < SENSORS_COUNT_MAX; i++) {
246	s->sensor[i].raw_temp_max = 0x55;
247	}
248	s->pointer = 0;
249	s->len = 0;
250	}
251
252	static void emc141x_initfn(Object *obj)
253	{
254	object_property_add(obj, "temperature0", "int",
255	emc141x_get_temperature,
256	emc141x_set_temperature, NULL, NULL);
257	object_property_add(obj, "temperature1", "int",
258	emc141x_get_temperature,
259	emc141x_set_temperature, NULL, NULL);
260	object_property_add(obj, "temperature2", "int",
261	emc141x_get_temperature,
262	emc141x_set_temperature, NULL, NULL);
263	object_property_add(obj, "temperature3", "int",
264	emc141x_get_temperature,
265	emc141x_set_temperature, NULL, NULL);
266	}
267
268	static void emc141x_class_init(ObjectClass klass, void data)
269	{
270	DeviceClass *dc = DEVICE_CLASS(klass);
271	I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
272
273	dc->reset = emc141x_reset;
274	k->event = emc141x_event;
275	k->recv = emc141x_rx;
276	k->send = emc141x_tx;
277	dc->vmsd = &vmstate_emc141x;
278	}
279
280	static void emc1413_class_init(ObjectClass klass, void data)
281	{
282	EMC141XClass *ec = EMC141X_CLASS(klass);
283
284	emc141x_class_init(klass, data);
285	ec->model = EMC1413_DEVICE_ID;
286	ec->sensors_count = 3;
287	}
288
289	static void emc1414_class_init(ObjectClass klass, void data)
290	{
291	EMC141XClass *ec = EMC141X_CLASS(klass);
292
293	emc141x_class_init(klass, data);
294	ec->model = EMC1414_DEVICE_ID;
295	ec->sensors_count = 4;
296	}
297
298	static const TypeInfo emc141x_info = {
299	.name = TYPE_EMC141X,
300	.parent = TYPE_I2C_SLAVE,
301	.instance_size = sizeof(EMC141XState),
302	.class_size = sizeof(EMC141XClass),
303	.instance_init = emc141x_initfn,
304	.abstract = true,
305	};
306
307	static const TypeInfo emc1413_info = {
308	.name = "emc1413",
309	.parent = TYPE_EMC141X,
310	.class_init = emc1413_class_init,
311	};
312
313	static const TypeInfo emc1414_info = {
314	.name = "emc1414",
315	.parent = TYPE_EMC141X,
316	.class_init = emc1414_class_init,
317	};
318
319	static void emc141x_register_types(void)
320	{
321	type_register_static(&emc141x_info);
322	type_register_static(&emc1413_info);
323	type_register_static(&emc1414_info);
324	}
325
326	type_init(emc141x_register_types)