[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 "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);

	/* Send header packet to the session bus. */
	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 sr_datafeed_packet packet;
	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;

	/* Send last packet. */
	packet.type = SR_DF_END;
	sr_session_send(sdi, &packet);

	if (devc->samples_missed > 0)
		sr_warn("%d 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
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
	20	#include "protocol.h"
a0648b1a DL	21	#include <time.h>
a0648b1a DL	22	#include <sys/timerfd.h>
dfaee1de BG	23
dfaee1de BG	24	SR_PRIV struct sr_dev_driver baylibre_acme_driver_info;
dfaee1de	25
6b80b80d BG	26	static const uint32_t devopts[] = {
	27	SR_CONF_CONTINUOUS \| SR_CONF_SET,
	28	SR_CONF_LIMIT_SAMPLES \| SR_CONF_GET \| SR_CONF_SET,
	29	SR_CONF_LIMIT_MSEC \| SR_CONF_GET \| SR_CONF_SET,
	30	SR_CONF_SAMPLERATE \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
5fabeeac BG	31	};
5fabeeac BG	32
1fe04eb8 BG	33	/*
	34	* Currently there are two channel-group/probe options for ACME:
	35	* - SR_CONF_PROBE_FACTOR - allows to modify current shunt resistance
	36	* calibration
	37	* - SR_CONF_POWER_OFF - allows to remotely cut-off/restore power to
	38	* measured devices
	39	*
	40	* They are not static - we have to check each probe's capabilities in
	41	* config_list().
	42	*/
	43	#define MAX_DEVOPTS_CG 2
	44	#define HAS_PROBE_FACTOR (SR_CONF_PROBE_FACTOR \| SR_CONF_GET \| SR_CONF_SET)
	45	#define HAS_POWER_OFF (SR_CONF_POWER_OFF \| SR_CONF_GET \| SR_CONF_SET)
6b80b80d	46
391e23a9	47	#define MAX_SAMPLE_RATE 500 /* In Hz */
6b80b80d BG	48
	49	static const uint64_t samplerates[] = {
	50	SR_HZ(1),
	51	SR_HZ(MAX_SAMPLE_RATE),
	52	SR_HZ(1),
	53	};
	54
4f840ce9	55	static int init(struct sr_dev_driver di, struct sr_context sr_ctx)
dfaee1de BG	56	{
	57	return std_init(sr_ctx, di, LOG_PREFIX);
	58	}
	59
4f840ce9	60	static GSList scan(struct sr_dev_driver di, GSList *options)
dfaee1de BG	61	{
dfaee1de BG	62	struct drv_context *drvc;
6b80b80d BG	63	struct dev_context *devc;
6b80b80d BG	64	struct sr_dev_inst *sdi;
dfaee1de	65	GSList *devices;
6b80b80d BG	66	gboolean status;
6b80b80d BG	67	int i;
dfaee1de BG	68
	69	(void)options;
	70
41812aca	71	drvc = di->context;
6b80b80d	72	devices = NULL;
dfaee1de	73
6b80b80d BG	74	devc = g_malloc0(sizeof(struct dev_context));
	75	devc->samplerate = SR_HZ(10);
	76
	77	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	78	sdi->status = SR_ST_INACTIVE;
3d14ce49 UH	79	sdi->vendor = g_strdup("BayLibre");
3d14ce49 UH	80	sdi->model = g_strdup("ACME");
6b80b80d BG	81	sdi->driver = di;
	82	sdi->priv = devc;
	83
	84	status = bl_acme_is_sane();
	85	if (!status)
	86	goto err_out;
	87
	88	/*
	89	* Iterate over all ACME connectors and check if any probes
	90	* are present.
	91	*/
	92	for (i = 0; i < MAX_PROBES; i++) {
	93	/*
	94	* First check if there's an energy probe on this connector. If
	95	* not, and we're already at the fifth probe - see if we can
	96	* detect a temperature probe.
	97	*/
	98	status = bl_acme_detect_probe(bl_acme_get_enrg_addr(i),
391e23a9	99	PROBE_NUM(i), ENRG_PROBE_NAME);
6b80b80d BG	100	if (status) {
6b80b80d BG	101	/* Energy probe detected. */
391e23a9 UH	102	status = bl_acme_register_probe(sdi, PROBE_ENRG,
391e23a9 UH	103	bl_acme_get_enrg_addr(i), PROBE_NUM(i));
6b80b80d BG	104	if (!status) {
	105	sr_err("Error registering power probe %d",
	106	PROBE_NUM(i));
	107	continue;
	108	}
6b80b80d BG	109	} else if (i >= TEMP_PRB_START_INDEX) {
6b80b80d BG	110	status = bl_acme_detect_probe(bl_acme_get_temp_addr(i),
391e23a9	111	PROBE_NUM(i), TEMP_PROBE_NAME);
6b80b80d BG	112	if (status) {
	113	/* Temperature probe detected. */
	114	status = bl_acme_register_probe(sdi,PROBE_TEMP,
391e23a9	115	bl_acme_get_temp_addr(i), PROBE_NUM(i));
6b80b80d BG	116	if (!status) {
	117	sr_err("Error registering temp "
	118	"probe %d", PROBE_NUM(i));
	119	continue;
	120	}
	121	}
6b80b80d BG	122	}
	123	}
	124
380ee96f BG	125	/*
	126	* Let's assume there's no ACME device present if no probe
	127	* has been registered.
	128	*/
98fec29e	129	if (!sdi->channel_groups)
380ee96f BG	130	goto err_out;
380ee96f BG	131
6b80b80d BG	132	devices = g_slist_append(devices, sdi);
6b80b80d BG	133	drvc->instances = g_slist_append(drvc->instances, sdi);
dfaee1de BG	134
dfaee1de BG	135	return devices;
6b80b80d BG	136
	137	err_out:
	138	g_free(devc);
	139	sr_dev_inst_free(sdi);
	140
	141	return NULL;
dfaee1de BG	142	}
dfaee1de BG	143
4f840ce9	144	static GSList dev_list(const struct sr_dev_driver di)
dfaee1de	145	{
41812aca	146	return ((struct drv_context *)(di->context))->instances;
dfaee1de BG	147	}
dfaee1de BG	148
4f840ce9	149	static int dev_clear(const struct sr_dev_driver *di)
dfaee1de BG	150	{
	151	return std_dev_clear(di, NULL);
	152	}
	153
	154	static int dev_open(struct sr_dev_inst *sdi)
	155	{
	156	(void)sdi;
	157
6b80b80d	158	/* Nothing to do here. */
dfaee1de BG	159	sdi->status = SR_ST_ACTIVE;
	160
	161	return SR_OK;
	162	}
	163
	164	static int dev_close(struct sr_dev_inst *sdi)
	165	{
	166	(void)sdi;
	167
6b80b80d	168	/* Nothing to do here. */
dfaee1de BG	169	sdi->status = SR_ST_INACTIVE;
	170
	171	return SR_OK;
	172	}
	173
4f840ce9	174	static int cleanup(const struct sr_dev_driver *di)
dfaee1de	175	{
4f840ce9	176	dev_clear(di);
dfaee1de	177
dfaee1de BG	178	return SR_OK;
	179	}
	180
6b80b80d BG	181	static int config_get(uint32_t key, GVariant **data,
	182	const struct sr_dev_inst *sdi,
	183	const struct sr_channel_group *cg)
dfaee1de	184	{
6b80b80d	185	struct dev_context *devc;
dfaee1de	186	int ret;
61f2b7f7	187	uint64_t shunt;
740ad48a	188	gboolean power_off;
dfaee1de	189
6b80b80d BG	190	devc = sdi->priv;
6b80b80d BG	191
dfaee1de BG	192	ret = SR_OK;
dfaee1de BG	193	switch (key) {
6b80b80d BG	194	case SR_CONF_LIMIT_SAMPLES:
	195	*data = g_variant_new_uint64(devc->limit_samples);
	196	break;
	197	case SR_CONF_LIMIT_MSEC:
	198	*data = g_variant_new_uint64(devc->limit_msec);
	199	break;
	200	case SR_CONF_SAMPLERATE:
	201	*data = g_variant_new_uint64(devc->samplerate);
	202	break;
61f2b7f7 BG	203	case SR_CONF_PROBE_FACTOR:
	204	if (!cg)
	205	return SR_ERR_CHANNEL_GROUP;
	206	ret = bl_acme_get_shunt(cg, &shunt);
	207	if (ret == SR_OK)
	208	*data = g_variant_new_uint64(shunt);
	209	break;
740ad48a BG	210	case SR_CONF_POWER_OFF:
	211	if (!cg)
	212	return SR_ERR_CHANNEL_GROUP;
	213	ret = bl_acme_read_power_state(cg, &power_off);
	214	if (ret == SR_OK)
	215	*data = g_variant_new_boolean(power_off);
	216	break;
dfaee1de BG	217	default:
	218	return SR_ERR_NA;
	219	}
	220
	221	return ret;
	222	}
	223
6b80b80d BG	224	static int config_set(uint32_t key, GVariant *data,
	225	const struct sr_dev_inst *sdi,
	226	const struct sr_channel_group *cg)
dfaee1de	227	{
6b80b80d BG	228	struct dev_context *devc;
6b80b80d BG	229	uint64_t samplerate;
dfaee1de BG	230	int ret;
dfaee1de BG	231
dfaee1de BG	232	if (sdi->status != SR_ST_ACTIVE)
	233	return SR_ERR_DEV_CLOSED;
	234
6b80b80d BG	235	devc = sdi->priv;
6b80b80d BG	236
dfaee1de BG	237	ret = SR_OK;
dfaee1de BG	238	switch (key) {
6b80b80d BG	239	case SR_CONF_LIMIT_SAMPLES:
	240	devc->limit_samples = g_variant_get_uint64(data);
	241	devc->limit_msec = 0;
6b80b80d BG	242	break;
	243	case SR_CONF_LIMIT_MSEC:
	244	devc->limit_msec = g_variant_get_uint64(data) * 1000;
	245	devc->limit_samples = 0;
6b80b80d BG	246	break;
	247	case SR_CONF_SAMPLERATE:
	248	samplerate = g_variant_get_uint64(data);
	249	if (samplerate > MAX_SAMPLE_RATE) {
	250	sr_err("Maximum sample rate is %d", MAX_SAMPLE_RATE);
	251	ret = SR_ERR_SAMPLERATE;
	252	break;
	253	}
	254	devc->samplerate = samplerate;
7c91c22a	255	bl_acme_maybe_set_update_interval(sdi, samplerate);
6b80b80d	256	break;
61f2b7f7 BG	257	case SR_CONF_PROBE_FACTOR:
	258	if (!cg)
	259	return SR_ERR_CHANNEL_GROUP;
	260	ret = bl_acme_set_shunt(cg, g_variant_get_uint64(data));
	261	break;
740ad48a BG	262	case SR_CONF_POWER_OFF:
	263	if (!cg)
	264	return SR_ERR_CHANNEL_GROUP;
	265	ret = bl_acme_set_power_off(cg, g_variant_get_boolean(data));
	266	break;
dfaee1de BG	267	default:
	268	ret = SR_ERR_NA;
	269	}
	270
	271	return ret;
	272	}
	273
6b80b80d BG	274	static int config_list(uint32_t key, GVariant **data,
	275	const struct sr_dev_inst *sdi,
	276	const struct sr_channel_group *cg)
dfaee1de	277	{
1fe04eb8	278	uint32_t devopts_cg[MAX_DEVOPTS_CG];
6b80b80d BG	279	GVariant *gvar;
6b80b80d BG	280	GVariantBuilder gvb;
1fe04eb8	281	int ret, num_devopts_cg = 0;
dfaee1de BG	282
dfaee1de BG	283	(void)sdi;
dfaee1de BG	284	(void)cg;
	285
	286	ret = SR_OK;
5fabeeac BG	287	if (!cg) {
	288	switch (key) {
	289	case SR_CONF_DEVICE_OPTIONS:
	290	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	291	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
	292	break;
	293	case SR_CONF_SAMPLERATE:
	294	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	295	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
	296	samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
	297	g_variant_builder_add(&gvb, "{sv}",
	298	"samplerate-steps", gvar);
	299	*data = g_variant_builder_end(&gvb);
	300	break;
	301	default:
	302	return SR_ERR_NA;
	303	}
	304	} else {
	305	switch (key) {
	306	case SR_CONF_DEVICE_OPTIONS:
1fe04eb8 BG	307	if (bl_acme_get_probe_type(cg) == PROBE_ENRG)
	308	devopts_cg[num_devopts_cg++] = HAS_PROBE_FACTOR;
	309	if (bl_acme_probe_has_pws(cg))
	310	devopts_cg[num_devopts_cg++] = HAS_POWER_OFF;
	311
5fabeeac	312	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
1fe04eb8	313	devopts_cg, num_devopts_cg, sizeof(uint32_t));
5fabeeac BG	314	break;
	315	default:
	316	return SR_ERR_NA;
	317	}
dfaee1de BG	318	}
	319
	320	return ret;
	321	}
	322
4e88b86c DL	323	static void dev_acquisition_close(const struct sr_dev_inst *sdi)
	324	{
	325	GSList *chl;
	326	struct sr_channel *ch;
	327
	328	for (chl = sdi->channels; chl; chl = chl->next) {
	329	ch = chl->data;
	330	bl_acme_close_channel(ch);
	331	}
	332	}
	333
	334	static int dev_acquisition_open(const struct sr_dev_inst *sdi)
	335	{
	336	GSList *chl;
	337	struct sr_channel *ch;
	338
	339	for (chl = sdi->channels; chl; chl = chl->next) {
	340	ch = chl->data;
	341	if (bl_acme_open_channel(ch)) {
	342	sr_err("Error opening channel %s", ch->name);
	343	dev_acquisition_close(sdi);
	344	return SR_ERR;
	345	}
	346	}
	347
	348	return 0;
	349	}
	350
6b80b80d	351	static int dev_acquisition_start(const struct sr_dev_inst sdi, void cb_data)
dfaee1de	352	{
6b80b80d	353	struct dev_context *devc;
a0648b1a DL	354	struct itimerspec tspec = {
	355	.it_interval = { 0, 0 },
	356	.it_value = { 0, 0 }
	357	};
6b80b80d	358
dfaee1de BG	359	(void)cb_data;
	360
	361	if (sdi->status != SR_ST_ACTIVE)
	362	return SR_ERR_DEV_CLOSED;
	363
4e88b86c DL	364	if (dev_acquisition_open(sdi))
	365	return SR_ERR;
	366
6b80b80d BG	367	devc = sdi->priv;
6b80b80d BG	368	devc->samples_read = 0;
a0648b1a DL	369	devc->samples_missed = 0;
	370	devc->timer_fd = timerfd_create(CLOCK_MONOTONIC, 0);
	371	if (devc->timer_fd < 0) {
	372	sr_err("Error creating timer fd");
	373	return SR_ERR;
	374	}
6b80b80d	375
a0648b1a	376	tspec.it_interval.tv_sec = 0;
7a1a3a36	377	tspec.it_interval.tv_nsec = SR_HZ_TO_NS(devc->samplerate);
a0648b1a DL	378	tspec.it_value = tspec.it_interval;
	379
	380	if (timerfd_settime(devc->timer_fd, 0, &tspec, NULL)) {
	381	sr_err("Failed to set timer");
	382	close(devc->timer_fd);
6b80b80d BG	383	return SR_ERR;
	384	}
	385
a0648b1a	386	devc->channel = g_io_channel_unix_new(devc->timer_fd);
6b80b80d BG	387	g_io_channel_set_flags(devc->channel, G_IO_FLAG_NONBLOCK, NULL);
	388	g_io_channel_set_encoding(devc->channel, NULL, NULL);
	389	g_io_channel_set_buffered(devc->channel, FALSE);
	390
	391	sr_session_source_add_channel(sdi->session, devc->channel,
a0648b1a	392	G_IO_IN \| G_IO_ERR, 1000, bl_acme_receive_data, (void *)sdi);
6b80b80d BG	393
	394	/* Send header packet to the session bus. */
	395	std_session_send_df_header(sdi, LOG_PREFIX);
	396	devc->start_time = g_get_monotonic_time();
dfaee1de BG	397
	398	return SR_OK;
	399	}
	400
	401	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	402	{
6b80b80d BG	403	struct sr_datafeed_packet packet;
	404	struct dev_context *devc;
	405
dfaee1de BG	406	(void)cb_data;
dfaee1de BG	407
6b80b80d BG	408	devc = sdi->priv;
6b80b80d BG	409
dfaee1de BG	410	if (sdi->status != SR_ST_ACTIVE)
	411	return SR_ERR_DEV_CLOSED;
	412
f9b0ab6b	413	dev_acquisition_close(sdi);
6b80b80d BG	414	sr_session_source_remove_channel(sdi->session, devc->channel);
	415	g_io_channel_shutdown(devc->channel, FALSE, NULL);
	416	g_io_channel_unref(devc->channel);
	417	devc->channel = NULL;
	418
	419	/* Send last packet. */
	420	packet.type = SR_DF_END;
	421	sr_session_send(sdi, &packet);
dfaee1de	422
a0648b1a DL	423	if (devc->samples_missed > 0)
	424	sr_warn("%d samples missed", devc->samples_missed);
	425
dfaee1de BG	426	return SR_OK;
	427	}
	428
	429	SR_PRIV struct sr_dev_driver baylibre_acme_driver_info = {
	430	.name = "baylibre-acme",
6b80b80d	431	.longname = "BayLibre ACME (Another Cute Measurement Equipment)",
dfaee1de BG	432	.api_version = 1,
	433	.init = init,
	434	.cleanup = cleanup,
	435	.scan = scan,
	436	.dev_list = dev_list,
	437	.dev_clear = dev_clear,
	438	.config_get = config_get,
	439	.config_set = config_set,
	440	.config_list = config_list,
	441	.dev_open = dev_open,
	442	.dev_close = dev_close,
	443	.dev_acquisition_start = dev_acquisition_start,
	444	.dev_acquisition_stop = dev_acquisition_stop,
41812aca	445	.context = NULL,
dfaee1de	446	};