[libsigrok.git] / src / hardware / baylibre-acme / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2015 Bartosz Golaszewski <bgolaszewski@baylibre.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 3 of the License, or
 * (at your option) any later version.
 *
 * 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 <config.h>
#include "protocol.h"
#include <time.h>
#include <sys/timerfd.h>

SR_PRIV struct sr_dev_driver baylibre_acme_driver_info;

static const uint32_t devopts[] = {
	SR_CONF_CONTINUOUS | SR_CONF_SET,
	SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
	SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
	SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
};

/*
 * Currently there are two channel-group/probe options for ACME:
 *   - SR_CONF_PROBE_FACTOR - allows to modify current shunt resistance
 *     calibration
 *   - SR_CONF_POWER_OFF - allows to remotely cut-off/restore power to
 *     measured devices
 *
 * They are not static - we have to check each probe's capabilities in
 * config_list().
 */
#define MAX_DEVOPTS_CG		2
#define HAS_PROBE_FACTOR	(SR_CONF_PROBE_FACTOR | SR_CONF_GET | SR_CONF_SET)
#define HAS_POWER_OFF		(SR_CONF_POWER_OFF | SR_CONF_GET | SR_CONF_SET)

#define MAX_SAMPLE_RATE 500 /* In Hz */

static const uint64_t samplerates[] = {
	SR_HZ(1),
	SR_HZ(MAX_SAMPLE_RATE),
	SR_HZ(1),
};

static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
{
	return std_init(sr_ctx, di, LOG_PREFIX);
}

static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_dev_inst *sdi;
	GSList *devices;
	gboolean status;
	int i;

	(void)options;

	drvc = di->context;
	devices = NULL;

	devc = g_malloc0(sizeof(struct dev_context));
	devc->samplerate = SR_HZ(10);

	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	sdi->status = SR_ST_INACTIVE;
	sdi->vendor = g_strdup("BayLibre");
	sdi->model = g_strdup("ACME");
	sdi->driver = di;
	sdi->priv = devc;

	status = bl_acme_is_sane();
	if (!status)
		goto err_out;

	/*
	 * Iterate over all ACME connectors and check if any probes
	 * are present.
	 */
	for (i = 0; i < MAX_PROBES; i++) {
		/*
		 * First check if there's an energy probe on this connector. If
		 * not, and we're already at the fifth probe - see if we can
		 * detect a temperature probe.
		 */
		status = bl_acme_detect_probe(bl_acme_get_enrg_addr(i),
					      PROBE_NUM(i), ENRG_PROBE_NAME);
		if (status) {
			/* Energy probe detected. */
			status = bl_acme_register_probe(sdi, PROBE_ENRG,
					bl_acme_get_enrg_addr(i), PROBE_NUM(i));
			if (!status) {
				sr_err("Error registering power probe %d",
				       PROBE_NUM(i));
				continue;
			}
		} else if (i >= TEMP_PRB_START_INDEX) {
			status = bl_acme_detect_probe(bl_acme_get_temp_addr(i),
					      PROBE_NUM(i), TEMP_PROBE_NAME);
			if (status) {
				/* Temperature probe detected. */
				status = bl_acme_register_probe(sdi,PROBE_TEMP,
					bl_acme_get_temp_addr(i), PROBE_NUM(i));
				if (!status) {
					sr_err("Error registering temp "
					       "probe %d", PROBE_NUM(i));
					continue;
				}
			}
		}
	}

	/*
	 * Let's assume there's no ACME device present if no probe
	 * has been registered.
	 */
	if (!sdi->channel_groups)
		goto err_out;

	devices = g_slist_append(devices, sdi);
	drvc->instances = g_slist_append(drvc->instances, sdi);

	return devices;

err_out:
	g_free(devc);
	sr_dev_inst_free(sdi);

	return NULL;
}

static GSList *dev_list(const struct sr_dev_driver *di)
{
	return ((struct drv_context *)(di->context))->instances;
}

static int dev_clear(const struct sr_dev_driver *di)
{
	return std_dev_clear(di, NULL);
}

static int dev_open(struct sr_dev_inst *sdi)
{
	(void)sdi;

	/* Nothing to do here. */
	sdi->status = SR_ST_ACTIVE;

	return SR_OK;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	(void)sdi;

	/* Nothing to do here. */
	sdi->status = SR_ST_INACTIVE;

	return SR_OK;
}

static int cleanup(const struct sr_dev_driver *di)
{
	dev_clear(di);

	return SR_OK;
}

static int config_get(uint32_t key, GVariant **data,
		      const struct sr_dev_inst *sdi,
		      const struct sr_channel_group *cg)
{
	struct dev_context *devc;
	int ret;
	uint64_t shunt;
	gboolean power_off;

	devc = sdi->priv;

	ret = SR_OK;
	switch (key) {
	case SR_CONF_LIMIT_SAMPLES:
		*data = g_variant_new_uint64(devc->limit_samples);
		break;
	case SR_CONF_LIMIT_MSEC:
		*data = g_variant_new_uint64(devc->limit_msec);
		break;
	case SR_CONF_SAMPLERATE:
		*data = g_variant_new_uint64(devc->samplerate);
		break;
	case SR_CONF_PROBE_FACTOR:
		if (!cg)
			return SR_ERR_CHANNEL_GROUP;
		ret = bl_acme_get_shunt(cg, &shunt);
		if (ret == SR_OK)
			*data = g_variant_new_uint64(shunt);
		break;
	case SR_CONF_POWER_OFF:
		if (!cg)
			return SR_ERR_CHANNEL_GROUP;
		ret = bl_acme_read_power_state(cg, &power_off);
		if (ret == SR_OK)
			*data = g_variant_new_boolean(power_off);
		break;
	default:
		return SR_ERR_NA;
	}

	return ret;
}

static int config_set(uint32_t key, GVariant *data,
		      const struct sr_dev_inst *sdi,
		      const struct sr_channel_group *cg)
{
	struct dev_context *devc;
	uint64_t samplerate;
	int ret;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	devc = sdi->priv;

	ret = SR_OK;
	switch (key) {
	case SR_CONF_LIMIT_SAMPLES:
		devc->limit_samples = g_variant_get_uint64(data);
		devc->limit_msec = 0;
		break;
	case SR_CONF_LIMIT_MSEC:
		devc->limit_msec = g_variant_get_uint64(data) * 1000;
		devc->limit_samples = 0;
		break;
	case SR_CONF_SAMPLERATE:
		samplerate = g_variant_get_uint64(data);
		if (samplerate > MAX_SAMPLE_RATE) {
			sr_err("Maximum sample rate is %d", MAX_SAMPLE_RATE);
			ret = SR_ERR_SAMPLERATE;
			break;
		}
		devc->samplerate = samplerate;
		bl_acme_maybe_set_update_interval(sdi, samplerate);
		break;
	case SR_CONF_PROBE_FACTOR:
		if (!cg)
			return SR_ERR_CHANNEL_GROUP;
		ret = bl_acme_set_shunt(cg, g_variant_get_uint64(data));
		break;
	case SR_CONF_POWER_OFF:
		if (!cg)
			return SR_ERR_CHANNEL_GROUP;
		ret = bl_acme_set_power_off(cg, g_variant_get_boolean(data));
		break;
	default:
		ret = SR_ERR_NA;
	}

	return ret;
}

static int config_list(uint32_t key, GVariant **data,
		       const struct sr_dev_inst *sdi,
		       const struct sr_channel_group *cg)
{
	uint32_t devopts_cg[MAX_DEVOPTS_CG];
	GVariant *gvar;
	GVariantBuilder gvb;
	int ret, num_devopts_cg = 0;

	(void)sdi;
	(void)cg;

	ret = SR_OK;
	if (!cg) {
		switch (key) {
		case SR_CONF_DEVICE_OPTIONS:
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
			break;
		case SR_CONF_SAMPLERATE:
			g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
			gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
				samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
			g_variant_builder_add(&gvb, "{sv}",
					      "samplerate-steps", gvar);
			*data = g_variant_builder_end(&gvb);
			break;
		default:
			return SR_ERR_NA;
		}
	} else {
		switch (key) {
		case SR_CONF_DEVICE_OPTIONS:
			if (bl_acme_get_probe_type(cg) == PROBE_ENRG)
				devopts_cg[num_devopts_cg++] = HAS_PROBE_FACTOR;
			if (bl_acme_probe_has_pws(cg))
				devopts_cg[num_devopts_cg++] = HAS_POWER_OFF;

			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				devopts_cg, num_devopts_cg, sizeof(uint32_t));
			break;
		default:
			return SR_ERR_NA;
		}
	}

	return ret;
}

static void dev_acquisition_close(const struct sr_dev_inst *sdi)
{
	GSList *chl;
	struct sr_channel *ch;

	for (chl = sdi->channels; chl; chl = chl->next) {
		ch = chl->data;
		bl_acme_close_channel(ch);
	}
}

static int dev_acquisition_open(const struct sr_dev_inst *sdi)
{
	GSList *chl;
	struct sr_channel *ch;

	for (chl = sdi->channels; chl; chl = chl->next) {
		ch = chl->data;
		if (bl_acme_open_channel(ch)) {
			sr_err("Error opening channel %s", ch->name);
			dev_acquisition_close(sdi);
			return SR_ERR;
		}
	}

	return 0;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
{
	struct dev_context *devc;
	struct itimerspec tspec = {
		.it_interval = { 0, 0 },
		.it_value = { 0, 0 }
	};

	(void)cb_data;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	if (dev_acquisition_open(sdi))
		return SR_ERR;

	devc = sdi->priv;
	devc->samples_read = 0;
	devc->samples_missed = 0;
	devc->timer_fd = timerfd_create(CLOCK_MONOTONIC, 0);
	if (devc->timer_fd < 0) {
		sr_err("Error creating timer fd");
		return SR_ERR;
	}

	tspec.it_interval.tv_sec = 0;
	tspec.it_interval.tv_nsec = SR_HZ_TO_NS(devc->samplerate);
	tspec.it_value = tspec.it_interval;

	if (timerfd_settime(devc->timer_fd, 0, &tspec, NULL)) {
		sr_err("Failed to set timer");
		close(devc->timer_fd);
		return SR_ERR;
	}

	devc->channel = g_io_channel_unix_new(devc->timer_fd);
	g_io_channel_set_flags(devc->channel, G_IO_FLAG_NONBLOCK, NULL);
	g_io_channel_set_encoding(devc->channel, NULL, NULL);
	g_io_channel_set_buffered(devc->channel, FALSE);

	sr_session_source_add_channel(sdi->session, devc->channel,
		G_IO_IN | G_IO_ERR, 1000, bl_acme_receive_data, (void *)sdi);

	std_session_send_df_header(sdi, LOG_PREFIX);
	devc->start_time = g_get_monotonic_time();

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
	struct dev_context *devc;

	(void)cb_data;

	devc = sdi->priv;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	dev_acquisition_close(sdi);
	sr_session_source_remove_channel(sdi->session, devc->channel);
	g_io_channel_shutdown(devc->channel, FALSE, NULL);
	g_io_channel_unref(devc->channel);
	devc->channel = NULL;

	std_session_send_df_end(sdi, LOG_PREFIX);

	if (devc->samples_missed > 0)
		sr_warn("%" PRIu64 " samples missed", devc->samples_missed);

	return SR_OK;
}

SR_PRIV struct sr_dev_driver baylibre_acme_driver_info = {
	.name = "baylibre-acme",
	.longname = "BayLibre ACME (Another Cute Measurement Equipment)",
	.api_version = 1,
	.init = init,
	.cleanup = cleanup,
	.scan = scan,
	.dev_list = dev_list,
	.dev_clear = dev_clear,
	.config_get = config_get,
	.config_set = config_set,
	.config_list = config_list,
	.dev_open = dev_open,
	.dev_close = dev_close,
	.dev_acquisition_start = dev_acquisition_start,
	.dev_acquisition_stop = dev_acquisition_stop,
	.context = NULL,
};
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2015 Bartosz Golaszewski <bgolaszewski@baylibre.com>
	5	*
	6	* This program is free software: you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation, either version 3 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include <config.h>
	21	#include "protocol.h"
	22	#include <time.h>
	23	#include <sys/timerfd.h>
	24
	25	SR_PRIV struct sr_dev_driver baylibre_acme_driver_info;
	26
	27	static const uint32_t devopts[] = {
	28	SR_CONF_CONTINUOUS \| SR_CONF_SET,
	29	SR_CONF_LIMIT_SAMPLES \| SR_CONF_GET \| SR_CONF_SET,
	30	SR_CONF_LIMIT_MSEC \| SR_CONF_GET \| SR_CONF_SET,
	31	SR_CONF_SAMPLERATE \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	32	};
	33
	34	/*
	35	* Currently there are two channel-group/probe options for ACME:
	36	* - SR_CONF_PROBE_FACTOR - allows to modify current shunt resistance
	37	* calibration
	38	* - SR_CONF_POWER_OFF - allows to remotely cut-off/restore power to
	39	* measured devices
	40	*
	41	* They are not static - we have to check each probe's capabilities in
	42	* config_list().
	43	*/
	44	#define MAX_DEVOPTS_CG 2
	45	#define HAS_PROBE_FACTOR (SR_CONF_PROBE_FACTOR \| SR_CONF_GET \| SR_CONF_SET)
	46	#define HAS_POWER_OFF (SR_CONF_POWER_OFF \| SR_CONF_GET \| SR_CONF_SET)
	47
	48	#define MAX_SAMPLE_RATE 500 /* In Hz */
	49
	50	static const uint64_t samplerates[] = {
	51	SR_HZ(1),
	52	SR_HZ(MAX_SAMPLE_RATE),
	53	SR_HZ(1),
	54	};
	55
	56	static int init(struct sr_dev_driver di, struct sr_context sr_ctx)
	57	{
	58	return std_init(sr_ctx, di, LOG_PREFIX);
	59	}
	60
	61	static GSList scan(struct sr_dev_driver di, GSList *options)
	62	{
	63	struct drv_context *drvc;
	64	struct dev_context *devc;
	65	struct sr_dev_inst *sdi;
	66	GSList *devices;
	67	gboolean status;
	68	int i;
	69
	70	(void)options;
	71
	72	drvc = di->context;
	73	devices = NULL;
	74
	75	devc = g_malloc0(sizeof(struct dev_context));
	76	devc->samplerate = SR_HZ(10);
	77
	78	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	79	sdi->status = SR_ST_INACTIVE;
	80	sdi->vendor = g_strdup("BayLibre");
	81	sdi->model = g_strdup("ACME");
	82	sdi->driver = di;
	83	sdi->priv = devc;
	84
	85	status = bl_acme_is_sane();
	86	if (!status)
	87	goto err_out;
	88
	89	/*
	90	* Iterate over all ACME connectors and check if any probes
	91	* are present.
	92	*/
	93	for (i = 0; i < MAX_PROBES; i++) {
	94	/*
	95	* First check if there's an energy probe on this connector. If
	96	* not, and we're already at the fifth probe - see if we can
	97	* detect a temperature probe.
	98	*/
	99	status = bl_acme_detect_probe(bl_acme_get_enrg_addr(i),
	100	PROBE_NUM(i), ENRG_PROBE_NAME);
	101	if (status) {
	102	/* Energy probe detected. */
	103	status = bl_acme_register_probe(sdi, PROBE_ENRG,
	104	bl_acme_get_enrg_addr(i), PROBE_NUM(i));
	105	if (!status) {
	106	sr_err("Error registering power probe %d",
	107	PROBE_NUM(i));
	108	continue;
	109	}
	110	} else if (i >= TEMP_PRB_START_INDEX) {
	111	status = bl_acme_detect_probe(bl_acme_get_temp_addr(i),
	112	PROBE_NUM(i), TEMP_PROBE_NAME);
	113	if (status) {
	114	/* Temperature probe detected. */
	115	status = bl_acme_register_probe(sdi,PROBE_TEMP,
	116	bl_acme_get_temp_addr(i), PROBE_NUM(i));
	117	if (!status) {
	118	sr_err("Error registering temp "
	119	"probe %d", PROBE_NUM(i));
	120	continue;
	121	}
	122	}
	123	}
	124	}
	125
	126	/*
	127	* Let's assume there's no ACME device present if no probe
	128	* has been registered.
	129	*/
	130	if (!sdi->channel_groups)
	131	goto err_out;
	132
	133	devices = g_slist_append(devices, sdi);
	134	drvc->instances = g_slist_append(drvc->instances, sdi);
	135
	136	return devices;
	137
	138	err_out:
	139	g_free(devc);
	140	sr_dev_inst_free(sdi);
	141
	142	return NULL;
	143	}
	144
	145	static GSList dev_list(const struct sr_dev_driver di)
	146	{
	147	return ((struct drv_context *)(di->context))->instances;
	148	}
	149
	150	static int dev_clear(const struct sr_dev_driver *di)
	151	{
	152	return std_dev_clear(di, NULL);
	153	}
	154
	155	static int dev_open(struct sr_dev_inst *sdi)
	156	{
	157	(void)sdi;
	158
	159	/* Nothing to do here. */
	160	sdi->status = SR_ST_ACTIVE;
	161
	162	return SR_OK;
	163	}
	164
	165	static int dev_close(struct sr_dev_inst *sdi)
	166	{
	167	(void)sdi;
	168
	169	/* Nothing to do here. */
	170	sdi->status = SR_ST_INACTIVE;
	171
	172	return SR_OK;
	173	}
	174
	175	static int cleanup(const struct sr_dev_driver *di)
	176	{
	177	dev_clear(di);
	178
	179	return SR_OK;
	180	}
	181
	182	static int config_get(uint32_t key, GVariant **data,
	183	const struct sr_dev_inst *sdi,
	184	const struct sr_channel_group *cg)
	185	{
	186	struct dev_context *devc;
	187	int ret;
	188	uint64_t shunt;
	189	gboolean power_off;
	190
	191	devc = sdi->priv;
	192
	193	ret = SR_OK;
	194	switch (key) {
	195	case SR_CONF_LIMIT_SAMPLES:
	196	*data = g_variant_new_uint64(devc->limit_samples);
	197	break;
	198	case SR_CONF_LIMIT_MSEC:
	199	*data = g_variant_new_uint64(devc->limit_msec);
	200	break;
	201	case SR_CONF_SAMPLERATE:
	202	*data = g_variant_new_uint64(devc->samplerate);
	203	break;
	204	case SR_CONF_PROBE_FACTOR:
	205	if (!cg)
	206	return SR_ERR_CHANNEL_GROUP;
	207	ret = bl_acme_get_shunt(cg, &shunt);
	208	if (ret == SR_OK)
	209	*data = g_variant_new_uint64(shunt);
	210	break;
	211	case SR_CONF_POWER_OFF:
	212	if (!cg)
	213	return SR_ERR_CHANNEL_GROUP;
	214	ret = bl_acme_read_power_state(cg, &power_off);
	215	if (ret == SR_OK)
	216	*data = g_variant_new_boolean(power_off);
	217	break;
	218	default:
	219	return SR_ERR_NA;
	220	}
	221
	222	return ret;
	223	}
	224
	225	static int config_set(uint32_t key, GVariant *data,
	226	const struct sr_dev_inst *sdi,
	227	const struct sr_channel_group *cg)
	228	{
	229	struct dev_context *devc;
	230	uint64_t samplerate;
	231	int ret;
	232
	233	if (sdi->status != SR_ST_ACTIVE)
	234	return SR_ERR_DEV_CLOSED;
	235
	236	devc = sdi->priv;
	237
	238	ret = SR_OK;
	239	switch (key) {
	240	case SR_CONF_LIMIT_SAMPLES:
	241	devc->limit_samples = g_variant_get_uint64(data);
	242	devc->limit_msec = 0;
	243	break;
	244	case SR_CONF_LIMIT_MSEC:
	245	devc->limit_msec = g_variant_get_uint64(data) * 1000;
	246	devc->limit_samples = 0;
	247	break;
	248	case SR_CONF_SAMPLERATE:
	249	samplerate = g_variant_get_uint64(data);
	250	if (samplerate > MAX_SAMPLE_RATE) {
	251	sr_err("Maximum sample rate is %d", MAX_SAMPLE_RATE);
	252	ret = SR_ERR_SAMPLERATE;
	253	break;
	254	}
	255	devc->samplerate = samplerate;
	256	bl_acme_maybe_set_update_interval(sdi, samplerate);
	257	break;
	258	case SR_CONF_PROBE_FACTOR:
	259	if (!cg)
	260	return SR_ERR_CHANNEL_GROUP;
	261	ret = bl_acme_set_shunt(cg, g_variant_get_uint64(data));
	262	break;
	263	case SR_CONF_POWER_OFF:
	264	if (!cg)
	265	return SR_ERR_CHANNEL_GROUP;
	266	ret = bl_acme_set_power_off(cg, g_variant_get_boolean(data));
	267	break;
	268	default:
	269	ret = SR_ERR_NA;
	270	}
	271
	272	return ret;
	273	}
	274
	275	static int config_list(uint32_t key, GVariant **data,
	276	const struct sr_dev_inst *sdi,
	277	const struct sr_channel_group *cg)
	278	{
	279	uint32_t devopts_cg[MAX_DEVOPTS_CG];
	280	GVariant *gvar;
	281	GVariantBuilder gvb;
	282	int ret, num_devopts_cg = 0;
	283
	284	(void)sdi;
	285	(void)cg;
	286
	287	ret = SR_OK;
	288	if (!cg) {
	289	switch (key) {
	290	case SR_CONF_DEVICE_OPTIONS:
	291	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	292	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
	293	break;
	294	case SR_CONF_SAMPLERATE:
	295	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	296	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
	297	samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
	298	g_variant_builder_add(&gvb, "{sv}",
	299	"samplerate-steps", gvar);
	300	*data = g_variant_builder_end(&gvb);
	301	break;
	302	default:
	303	return SR_ERR_NA;
	304	}
	305	} else {
	306	switch (key) {
	307	case SR_CONF_DEVICE_OPTIONS:
	308	if (bl_acme_get_probe_type(cg) == PROBE_ENRG)
	309	devopts_cg[num_devopts_cg++] = HAS_PROBE_FACTOR;
	310	if (bl_acme_probe_has_pws(cg))
	311	devopts_cg[num_devopts_cg++] = HAS_POWER_OFF;
	312
	313	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	314	devopts_cg, num_devopts_cg, sizeof(uint32_t));
	315	break;
	316	default:
	317	return SR_ERR_NA;
	318	}
	319	}
	320
	321	return ret;
	322	}
	323
	324	static void dev_acquisition_close(const struct sr_dev_inst *sdi)
	325	{
	326	GSList *chl;
	327	struct sr_channel *ch;
	328
	329	for (chl = sdi->channels; chl; chl = chl->next) {
	330	ch = chl->data;
	331	bl_acme_close_channel(ch);
	332	}
	333	}
	334
	335	static int dev_acquisition_open(const struct sr_dev_inst *sdi)
	336	{
	337	GSList *chl;
	338	struct sr_channel *ch;
	339
	340	for (chl = sdi->channels; chl; chl = chl->next) {
	341	ch = chl->data;
	342	if (bl_acme_open_channel(ch)) {
	343	sr_err("Error opening channel %s", ch->name);
	344	dev_acquisition_close(sdi);
	345	return SR_ERR;
	346	}
	347	}
	348
	349	return 0;
	350	}
	351
	352	static int dev_acquisition_start(const struct sr_dev_inst sdi, void cb_data)
	353	{
	354	struct dev_context *devc;
	355	struct itimerspec tspec = {
	356	.it_interval = { 0, 0 },
	357	.it_value = { 0, 0 }
	358	};
	359
	360	(void)cb_data;
	361
	362	if (sdi->status != SR_ST_ACTIVE)
	363	return SR_ERR_DEV_CLOSED;
	364
	365	if (dev_acquisition_open(sdi))
	366	return SR_ERR;
	367
	368	devc = sdi->priv;
	369	devc->samples_read = 0;
	370	devc->samples_missed = 0;
	371	devc->timer_fd = timerfd_create(CLOCK_MONOTONIC, 0);
	372	if (devc->timer_fd < 0) {
	373	sr_err("Error creating timer fd");
	374	return SR_ERR;
	375	}
	376
	377	tspec.it_interval.tv_sec = 0;
	378	tspec.it_interval.tv_nsec = SR_HZ_TO_NS(devc->samplerate);
	379	tspec.it_value = tspec.it_interval;
	380
	381	if (timerfd_settime(devc->timer_fd, 0, &tspec, NULL)) {
	382	sr_err("Failed to set timer");
	383	close(devc->timer_fd);
	384	return SR_ERR;
	385	}
	386
	387	devc->channel = g_io_channel_unix_new(devc->timer_fd);
	388	g_io_channel_set_flags(devc->channel, G_IO_FLAG_NONBLOCK, NULL);
	389	g_io_channel_set_encoding(devc->channel, NULL, NULL);
	390	g_io_channel_set_buffered(devc->channel, FALSE);
	391
	392	sr_session_source_add_channel(sdi->session, devc->channel,
	393	G_IO_IN \| G_IO_ERR, 1000, bl_acme_receive_data, (void *)sdi);
	394
	395	std_session_send_df_header(sdi, LOG_PREFIX);
	396	devc->start_time = g_get_monotonic_time();
	397
	398	return SR_OK;
	399	}
	400
	401	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	402	{
	403	struct dev_context *devc;
	404
	405	(void)cb_data;
	406
	407	devc = sdi->priv;
	408
	409	if (sdi->status != SR_ST_ACTIVE)
	410	return SR_ERR_DEV_CLOSED;
	411
	412	dev_acquisition_close(sdi);
	413	sr_session_source_remove_channel(sdi->session, devc->channel);
	414	g_io_channel_shutdown(devc->channel, FALSE, NULL);
	415	g_io_channel_unref(devc->channel);
	416	devc->channel = NULL;
	417
	418	std_session_send_df_end(sdi, LOG_PREFIX);
	419
	420	if (devc->samples_missed > 0)
	421	sr_warn("%" PRIu64 " samples missed", devc->samples_missed);
	422
	423	return SR_OK;
	424	}
	425
	426	SR_PRIV struct sr_dev_driver baylibre_acme_driver_info = {
	427	.name = "baylibre-acme",
	428	.longname = "BayLibre ACME (Another Cute Measurement Equipment)",
	429	.api_version = 1,
	430	.init = init,
	431	.cleanup = cleanup,
	432	.scan = scan,
	433	.dev_list = dev_list,
	434	.dev_clear = dev_clear,
	435	.config_get = config_get,
	436	.config_set = config_set,
	437	.config_list = config_list,
	438	.dev_open = dev_open,
	439	.dev_close = dev_close,
	440	.dev_acquisition_start = dev_acquisition_start,
	441	.dev_acquisition_stop = dev_acquisition_stop,
	442	.context = NULL,
	443	};