[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_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(di, sr_ctx);
}

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

	sdi->status = SR_ST_ACTIVE;

	return SR_OK;
}

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

	sdi->status = SR_ST_INACTIVE;

	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:
	case SR_CONF_LIMIT_MSEC:
		ret = sr_sw_limits_config_get(&devc->limits, key, data);
		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:
	case SR_CONF_LIMIT_MSEC:
		ret = sr_sw_limits_config_set(&devc->limits, key, data);
		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)
{
	struct dev_context *devc;
	struct itimerspec tspec = {
		.it_interval = { 0, 0 },
		.it_value = { 0, 0 }
	};

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

	if (dev_acquisition_open(sdi))
		return SR_ERR;

	devc = sdi->priv;
	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);
	sr_sw_limits_acquisition_start(&devc->limits);

	return SR_OK;
}

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

	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 = std_cleanup,
	.scan = scan,
	.dev_list = std_dev_list,
	.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
dfaee1de BG	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
6ec6c43b	20	#include <config.h>
dfaee1de	21	#include "protocol.h"
a0648b1a DL	22	#include <time.h>
a0648b1a DL	23	#include <sys/timerfd.h>
dfaee1de BG	24
dfaee1de BG	25	SR_PRIV struct sr_dev_driver baylibre_acme_driver_info;
dfaee1de	26
6b80b80d	27	static const uint32_t devopts[] = {
e91bb0a6	28	SR_CONF_CONTINUOUS,
6b80b80d BG	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,
5fabeeac BG	32	};
5fabeeac BG	33
1fe04eb8 BG	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)
6b80b80d	47
391e23a9	48	#define MAX_SAMPLE_RATE 500 /* In Hz */
6b80b80d BG	49
	50	static const uint64_t samplerates[] = {
	51	SR_HZ(1),
	52	SR_HZ(MAX_SAMPLE_RATE),
	53	SR_HZ(1),
	54	};
	55
4f840ce9	56	static int init(struct sr_dev_driver di, struct sr_context sr_ctx)
dfaee1de	57	{
c45c32ce	58	return std_init(di, sr_ctx);
dfaee1de BG	59	}
dfaee1de BG	60
4f840ce9	61	static GSList scan(struct sr_dev_driver di, GSList *options)
dfaee1de BG	62	{
dfaee1de BG	63	struct drv_context *drvc;
6b80b80d BG	64	struct dev_context *devc;
6b80b80d BG	65	struct sr_dev_inst *sdi;
dfaee1de	66	GSList *devices;
6b80b80d BG	67	gboolean status;
6b80b80d BG	68	int i;
dfaee1de BG	69
	70	(void)options;
	71
41812aca	72	drvc = di->context;
6b80b80d	73	devices = NULL;
dfaee1de	74
6b80b80d BG	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;
3d14ce49 UH	80	sdi->vendor = g_strdup("BayLibre");
3d14ce49 UH	81	sdi->model = g_strdup("ACME");
6b80b80d BG	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),
391e23a9	100	PROBE_NUM(i), ENRG_PROBE_NAME);
6b80b80d BG	101	if (status) {
6b80b80d BG	102	/* Energy probe detected. */
391e23a9 UH	103	status = bl_acme_register_probe(sdi, PROBE_ENRG,
391e23a9 UH	104	bl_acme_get_enrg_addr(i), PROBE_NUM(i));
6b80b80d BG	105	if (!status) {
	106	sr_err("Error registering power probe %d",
	107	PROBE_NUM(i));
	108	continue;
	109	}
6b80b80d BG	110	} else if (i >= TEMP_PRB_START_INDEX) {
6b80b80d BG	111	status = bl_acme_detect_probe(bl_acme_get_temp_addr(i),
391e23a9	112	PROBE_NUM(i), TEMP_PROBE_NAME);
6b80b80d BG	113	if (status) {
	114	/* Temperature probe detected. */
	115	status = bl_acme_register_probe(sdi,PROBE_TEMP,
391e23a9	116	bl_acme_get_temp_addr(i), PROBE_NUM(i));
6b80b80d BG	117	if (!status) {
	118	sr_err("Error registering temp "
	119	"probe %d", PROBE_NUM(i));
	120	continue;
	121	}
	122	}
6b80b80d BG	123	}
	124	}
	125
380ee96f BG	126	/*
	127	* Let's assume there's no ACME device present if no probe
	128	* has been registered.
	129	*/
98fec29e	130	if (!sdi->channel_groups)
380ee96f BG	131	goto err_out;
380ee96f BG	132
6b80b80d BG	133	devices = g_slist_append(devices, sdi);
6b80b80d BG	134	drvc->instances = g_slist_append(drvc->instances, sdi);
dfaee1de BG	135
dfaee1de BG	136	return devices;
6b80b80d BG	137
	138	err_out:
	139	g_free(devc);
	140	sr_dev_inst_free(sdi);
	141
	142	return NULL;
dfaee1de BG	143	}
dfaee1de BG	144
dfaee1de BG	145	static int dev_open(struct sr_dev_inst *sdi)
	146	{
	147	(void)sdi;
	148
dfaee1de BG	149	sdi->status = SR_ST_ACTIVE;
	150
	151	return SR_OK;
	152	}
	153
	154	static int dev_close(struct sr_dev_inst *sdi)
	155	{
	156	(void)sdi;
	157
dfaee1de BG	158	sdi->status = SR_ST_INACTIVE;
	159
	160	return SR_OK;
	161	}
	162
6b80b80d BG	163	static int config_get(uint32_t key, GVariant **data,
	164	const struct sr_dev_inst *sdi,
	165	const struct sr_channel_group *cg)
dfaee1de	166	{
6b80b80d	167	struct dev_context *devc;
dfaee1de	168	int ret;
61f2b7f7	169	uint64_t shunt;
740ad48a	170	gboolean power_off;
dfaee1de	171
6b80b80d BG	172	devc = sdi->priv;
6b80b80d BG	173
dfaee1de BG	174	ret = SR_OK;
dfaee1de BG	175	switch (key) {
6b80b80d	176	case SR_CONF_LIMIT_SAMPLES:
6b80b80d	177	case SR_CONF_LIMIT_MSEC:
d54a7c42	178	ret = sr_sw_limits_config_get(&devc->limits, key, data);
6b80b80d BG	179	break;
	180	case SR_CONF_SAMPLERATE:
	181	*data = g_variant_new_uint64(devc->samplerate);
	182	break;
61f2b7f7 BG	183	case SR_CONF_PROBE_FACTOR:
	184	if (!cg)
	185	return SR_ERR_CHANNEL_GROUP;
	186	ret = bl_acme_get_shunt(cg, &shunt);
	187	if (ret == SR_OK)
	188	*data = g_variant_new_uint64(shunt);
	189	break;
740ad48a BG	190	case SR_CONF_POWER_OFF:
	191	if (!cg)
	192	return SR_ERR_CHANNEL_GROUP;
	193	ret = bl_acme_read_power_state(cg, &power_off);
	194	if (ret == SR_OK)
	195	*data = g_variant_new_boolean(power_off);
	196	break;
dfaee1de BG	197	default:
	198	return SR_ERR_NA;
	199	}
	200
	201	return ret;
	202	}
	203
6b80b80d BG	204	static int config_set(uint32_t key, GVariant *data,
	205	const struct sr_dev_inst *sdi,
	206	const struct sr_channel_group *cg)
dfaee1de	207	{
6b80b80d BG	208	struct dev_context *devc;
6b80b80d BG	209	uint64_t samplerate;
dfaee1de BG	210	int ret;
dfaee1de BG	211
dfaee1de BG	212	if (sdi->status != SR_ST_ACTIVE)
	213	return SR_ERR_DEV_CLOSED;
	214
6b80b80d BG	215	devc = sdi->priv;
6b80b80d BG	216
dfaee1de BG	217	ret = SR_OK;
dfaee1de BG	218	switch (key) {
6b80b80d	219	case SR_CONF_LIMIT_SAMPLES:
6b80b80d	220	case SR_CONF_LIMIT_MSEC:
d54a7c42	221	ret = sr_sw_limits_config_set(&devc->limits, key, data);
6b80b80d BG	222	break;
	223	case SR_CONF_SAMPLERATE:
	224	samplerate = g_variant_get_uint64(data);
	225	if (samplerate > MAX_SAMPLE_RATE) {
	226	sr_err("Maximum sample rate is %d", MAX_SAMPLE_RATE);
	227	ret = SR_ERR_SAMPLERATE;
	228	break;
	229	}
	230	devc->samplerate = samplerate;
7c91c22a	231	bl_acme_maybe_set_update_interval(sdi, samplerate);
6b80b80d	232	break;
61f2b7f7 BG	233	case SR_CONF_PROBE_FACTOR:
	234	if (!cg)
	235	return SR_ERR_CHANNEL_GROUP;
	236	ret = bl_acme_set_shunt(cg, g_variant_get_uint64(data));
	237	break;
740ad48a BG	238	case SR_CONF_POWER_OFF:
	239	if (!cg)
	240	return SR_ERR_CHANNEL_GROUP;
	241	ret = bl_acme_set_power_off(cg, g_variant_get_boolean(data));
	242	break;
dfaee1de BG	243	default:
	244	ret = SR_ERR_NA;
	245	}
	246
	247	return ret;
	248	}
	249
6b80b80d BG	250	static int config_list(uint32_t key, GVariant **data,
	251	const struct sr_dev_inst *sdi,
	252	const struct sr_channel_group *cg)
dfaee1de	253	{
1fe04eb8	254	uint32_t devopts_cg[MAX_DEVOPTS_CG];
6b80b80d BG	255	GVariant *gvar;
6b80b80d BG	256	GVariantBuilder gvb;
1fe04eb8	257	int ret, num_devopts_cg = 0;
dfaee1de BG	258
dfaee1de BG	259	(void)sdi;
dfaee1de BG	260	(void)cg;
	261
	262	ret = SR_OK;
5fabeeac BG	263	if (!cg) {
	264	switch (key) {
	265	case SR_CONF_DEVICE_OPTIONS:
	266	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	267	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
	268	break;
	269	case SR_CONF_SAMPLERATE:
	270	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	271	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
	272	samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
	273	g_variant_builder_add(&gvb, "{sv}",
	274	"samplerate-steps", gvar);
	275	*data = g_variant_builder_end(&gvb);
	276	break;
	277	default:
	278	return SR_ERR_NA;
	279	}
	280	} else {
	281	switch (key) {
	282	case SR_CONF_DEVICE_OPTIONS:
1fe04eb8 BG	283	if (bl_acme_get_probe_type(cg) == PROBE_ENRG)
	284	devopts_cg[num_devopts_cg++] = HAS_PROBE_FACTOR;
	285	if (bl_acme_probe_has_pws(cg))
	286	devopts_cg[num_devopts_cg++] = HAS_POWER_OFF;
	287
5fabeeac	288	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
1fe04eb8	289	devopts_cg, num_devopts_cg, sizeof(uint32_t));
5fabeeac BG	290	break;
	291	default:
	292	return SR_ERR_NA;
	293	}
dfaee1de BG	294	}
	295
	296	return ret;
	297	}
	298
4e88b86c DL	299	static void dev_acquisition_close(const struct sr_dev_inst *sdi)
	300	{
	301	GSList *chl;
	302	struct sr_channel *ch;
	303
	304	for (chl = sdi->channels; chl; chl = chl->next) {
	305	ch = chl->data;
	306	bl_acme_close_channel(ch);
	307	}
	308	}
	309
	310	static int dev_acquisition_open(const struct sr_dev_inst *sdi)
	311	{
	312	GSList *chl;
	313	struct sr_channel *ch;
	314
	315	for (chl = sdi->channels; chl; chl = chl->next) {
	316	ch = chl->data;
	317	if (bl_acme_open_channel(ch)) {
	318	sr_err("Error opening channel %s", ch->name);
	319	dev_acquisition_close(sdi);
	320	return SR_ERR;
	321	}
	322	}
	323
	324	return 0;
	325	}
	326
695dc859	327	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
dfaee1de	328	{
6b80b80d	329	struct dev_context *devc;
a0648b1a DL	330	struct itimerspec tspec = {
	331	.it_interval = { 0, 0 },
	332	.it_value = { 0, 0 }
	333	};
6b80b80d	334
dfaee1de BG	335	if (sdi->status != SR_ST_ACTIVE)
	336	return SR_ERR_DEV_CLOSED;
	337
4e88b86c DL	338	if (dev_acquisition_open(sdi))
	339	return SR_ERR;
	340
6b80b80d	341	devc = sdi->priv;
a0648b1a DL	342	devc->samples_missed = 0;
	343	devc->timer_fd = timerfd_create(CLOCK_MONOTONIC, 0);
	344	if (devc->timer_fd < 0) {
	345	sr_err("Error creating timer fd");
	346	return SR_ERR;
	347	}
6b80b80d	348
a0648b1a	349	tspec.it_interval.tv_sec = 0;
7a1a3a36	350	tspec.it_interval.tv_nsec = SR_HZ_TO_NS(devc->samplerate);
a0648b1a DL	351	tspec.it_value = tspec.it_interval;
	352
	353	if (timerfd_settime(devc->timer_fd, 0, &tspec, NULL)) {
	354	sr_err("Failed to set timer");
	355	close(devc->timer_fd);
6b80b80d BG	356	return SR_ERR;
	357	}
	358
a0648b1a	359	devc->channel = g_io_channel_unix_new(devc->timer_fd);
6b80b80d BG	360	g_io_channel_set_flags(devc->channel, G_IO_FLAG_NONBLOCK, NULL);
	361	g_io_channel_set_encoding(devc->channel, NULL, NULL);
	362	g_io_channel_set_buffered(devc->channel, FALSE);
	363
	364	sr_session_source_add_channel(sdi->session, devc->channel,
a0648b1a	365	G_IO_IN \| G_IO_ERR, 1000, bl_acme_receive_data, (void *)sdi);
6b80b80d	366
6b80b80d	367	std_session_send_df_header(sdi, LOG_PREFIX);
d54a7c42	368	sr_sw_limits_acquisition_start(&devc->limits);
dfaee1de BG	369
	370	return SR_OK;
	371	}
	372
695dc859	373	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
dfaee1de	374	{
6b80b80d BG	375	struct dev_context *devc;
6b80b80d BG	376
6b80b80d BG	377	devc = sdi->priv;
6b80b80d BG	378
dfaee1de BG	379	if (sdi->status != SR_ST_ACTIVE)
	380	return SR_ERR_DEV_CLOSED;
	381
f9b0ab6b	382	dev_acquisition_close(sdi);
6b80b80d BG	383	sr_session_source_remove_channel(sdi->session, devc->channel);
	384	g_io_channel_shutdown(devc->channel, FALSE, NULL);
	385	g_io_channel_unref(devc->channel);
	386	devc->channel = NULL;
	387
3be42bc2	388	std_session_send_df_end(sdi, LOG_PREFIX);
dfaee1de	389
a0648b1a	390	if (devc->samples_missed > 0)
6433156c	391	sr_warn("%" PRIu64 " samples missed", devc->samples_missed);
a0648b1a	392
dfaee1de BG	393	return SR_OK;
	394	}
	395
	396	SR_PRIV struct sr_dev_driver baylibre_acme_driver_info = {
	397	.name = "baylibre-acme",
6b80b80d	398	.longname = "BayLibre ACME (Another Cute Measurement Equipment)",
dfaee1de BG	399	.api_version = 1,
dfaee1de BG	400	.init = init,
700d6b64	401	.cleanup = std_cleanup,
dfaee1de	402	.scan = scan,
c01bf34c	403	.dev_list = std_dev_list,
dfaee1de BG	404	.config_get = config_get,
	405	.config_set = config_set,
	406	.config_list = config_list,
	407	.dev_open = dev_open,
	408	.dev_close = dev_close,
	409	.dev_acquisition_start = dev_acquisition_start,
	410	.dev_acquisition_stop = dev_acquisition_stop,
41812aca	411	.context = NULL,
dfaee1de	412	};