[libsigrok.git] / src / hardware / scpi-pps / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2014 Bert Vermeulen <bert@biot.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 <string.h>
#include <strings.h>
#include "protocol.h"

SR_PRIV struct sr_dev_driver scpi_pps_driver_info;
extern unsigned int num_pps_profiles;
extern const struct scpi_pps pps_profiles[];

static const uint32_t scanopts[] = {
	SR_CONF_CONN,
	SR_CONF_SERIALCOMM,
};

static const uint32_t drvopts[] = {
	SR_CONF_POWER_SUPPLY,
};

static const struct pps_channel_instance pci[] = {
	{ SR_MQ_VOLTAGE, SCPI_CMD_GET_MEAS_VOLTAGE, "V" },
	{ SR_MQ_CURRENT, SCPI_CMD_GET_MEAS_CURRENT, "I" },
	{ SR_MQ_POWER, SCPI_CMD_GET_MEAS_POWER, "P" },
};

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

static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi)
{
	struct dev_context *devc;
	struct sr_dev_inst *sdi;
	struct sr_scpi_hw_info *hw_info;
	struct sr_channel_group *cg;
	struct sr_channel *ch;
	const struct scpi_pps *device;
	struct pps_channel *pch;
	struct channel_spec *channels;
	struct channel_group_spec *channel_groups, *cgs;
	struct pps_channel_group *pcg;
	GRegex *model_re;
	GMatchInfo *model_mi;
	GSList *l;
	uint64_t mask;
	unsigned int num_channels, num_channel_groups, ch_num, ch_idx, i, j;
	int ret;
	const char *vendor;
	char ch_name[16];

	if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
		sr_info("Couldn't get IDN response.");
		return NULL;
	}

	device = NULL;
	for (i = 0; i < num_pps_profiles; i++) {
		vendor = get_vendor(hw_info->manufacturer);
		if (strcasecmp(vendor, pps_profiles[i].vendor))
			continue;
		model_re = g_regex_new(pps_profiles[i].model, 0, 0, NULL);
		if (g_regex_match(model_re, hw_info->model, 0, &model_mi))
			device = &pps_profiles[i];
		g_match_info_unref(model_mi);
		g_regex_unref(model_re);
		if (device)
			break;
	}
	if (!device) {
		sr_scpi_hw_info_free(hw_info);
		return NULL;
	}

	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	sdi->status = SR_ST_INACTIVE;
	sdi->vendor = g_strdup(vendor);
	sdi->model = g_strdup(hw_info->model);
	sdi->version = g_strdup(hw_info->firmware_version);
	sdi->conn = scpi;
	sdi->driver = &scpi_pps_driver_info;
	sdi->inst_type = SR_INST_SCPI;
	sdi->serial_num = g_strdup(hw_info->serial_number);

	devc = g_malloc0(sizeof(struct dev_context));
	devc->device = device;
	sdi->priv = devc;

	if (device->num_channels) {
		/* Static channels and groups. */
		channels = (struct channel_spec *)device->channels;
		num_channels = device->num_channels;
		channel_groups = (struct channel_group_spec *)device->channel_groups;
		num_channel_groups = device->num_channel_groups;
	} else {
		/* Channels and groups need to be probed. */
		ret = device->probe_channels(sdi, hw_info, &channels, &num_channels,
				&channel_groups, &num_channel_groups);
		if (ret != SR_OK) {
			sr_err("Failed to probe for channels.");
			return NULL;
		}
		/*
		 * Since these were dynamically allocated, we'll need to free them
		 * later.
		 */
		devc->channels = channels;
		devc->channel_groups = channel_groups;
	}

	ch_idx = 0;
	for (ch_num = 0; ch_num < num_channels; ch_num++) {
		/* Create one channel per measurable output unit. */
		for (i = 0; i < ARRAY_SIZE(pci); i++) {
			if (!scpi_cmd_get(sdi, pci[i].command))
				continue;
			g_snprintf(ch_name, 16, "%s%s", pci[i].prefix,
					channels[ch_num].name);
			ch = sr_channel_new(sdi, ch_idx++, SR_CHANNEL_ANALOG, TRUE,
					ch_name);
			pch = g_malloc0(sizeof(struct pps_channel));
			pch->hw_output_idx = ch_num;
			pch->hwname = channels[ch_num].name;
			pch->mq = pci[i].mq;
			ch->priv = pch;
		}
	}

	for (i = 0; i < num_channel_groups; i++) {
		cgs = &channel_groups[i];
		cg = g_malloc0(sizeof(struct sr_channel_group));
		cg->name = g_strdup(cgs->name);
		for (j = 0, mask = 1; j < 64; j++, mask <<= 1) {
			if (cgs->channel_index_mask & mask) {
				for (l = sdi->channels; l; l = l->next) {
					ch = l->data;
					pch = ch->priv;
					if (pch->hw_output_idx == j)
						cg->channels = g_slist_append(cg->channels, ch);
				}
			}
		}
		pcg = g_malloc0(sizeof(struct pps_channel_group));
		pcg->features = cgs->features;
		cg->priv = pcg;
		sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
	}

	sr_scpi_hw_info_free(hw_info);
	hw_info = NULL;

	scpi_cmd(sdi, SCPI_CMD_LOCAL);
	sr_scpi_close(scpi);

	return sdi;
}

static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
	return sr_scpi_scan(di->priv, options, probe_device);
}

static GSList *dev_list(const struct sr_dev_driver *di)
{
	return ((struct drv_context *)(di->priv))->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)
{
	struct dev_context *devc;
	struct sr_scpi_dev_inst *scpi;
	GVariant *beeper;

	if (sdi->status != SR_ST_INACTIVE)
		return SR_ERR;

	scpi = sdi->conn;
	if (sr_scpi_open(scpi) < 0)
		return SR_ERR;

	sdi->status = SR_ST_ACTIVE;

	scpi_cmd(sdi, SCPI_CMD_REMOTE);
	devc = sdi->priv;
	devc->beeper_was_set = FALSE;
	if (scpi_cmd_resp(sdi, &beeper, G_VARIANT_TYPE_BOOLEAN, SCPI_CMD_BEEPER) == SR_OK) {
		if (g_variant_get_boolean(beeper)) {
			devc->beeper_was_set = TRUE;
			scpi_cmd(sdi, SCPI_CMD_BEEPER_DISABLE);
		}
		g_variant_unref(beeper);
	}

	return SR_OK;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	struct sr_scpi_dev_inst *scpi;
	struct dev_context *devc;

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

	devc = sdi->priv;
	scpi = sdi->conn;
	if (scpi) {
		if (devc->beeper_was_set)
			scpi_cmd(sdi, SCPI_CMD_BEEPER_ENABLE);
		scpi_cmd(sdi, SCPI_CMD_LOCAL);
		sr_scpi_close(scpi);
		sdi->status = SR_ST_INACTIVE;
	}

	return SR_OK;
}

static void clear_helper(void *priv)
{
	struct dev_context *devc;

	devc = priv;
	g_free(devc->channels);
	g_free(devc->channel_groups);
	g_free(devc);
}

static int cleanup(const struct sr_dev_driver *di)
{
	return std_dev_clear(di, clear_helper);
}

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;
	const GVariantType *gvtype;
	unsigned int i;
	int cmd, ret;

	if (!sdi)
		return SR_ERR_ARG;

	devc = sdi->priv;

	if (cg) {
		/*
		 * These options only apply to channel groups with a single
		 * channel -- they're per-channel settings for the device.
		 */

		/*
		 * Config keys are handled below depending on whether a channel
		 * group was provided by the frontend. However some of these
		 * take a CG on one PPS but not on others. Check the device's
		 * profile for that here, and NULL out the channel group as needed.
		 */
		for (i = 0; i < devc->device->num_devopts; i++) {
			if (devc->device->devopts[i] == key) {
				cg = NULL;
				break;
			}
		}
	}

	gvtype = NULL;
	cmd = -1;
	switch (key) {
	case SR_CONF_OUTPUT_ENABLED:
		gvtype = G_VARIANT_TYPE_BOOLEAN;
		cmd = SCPI_CMD_GET_OUTPUT_ENABLED;
		break;
	case SR_CONF_OUTPUT_VOLTAGE:
		gvtype = G_VARIANT_TYPE_DOUBLE;
		cmd = SCPI_CMD_GET_MEAS_VOLTAGE;
		break;
	case SR_CONF_OUTPUT_VOLTAGE_TARGET:
		gvtype = G_VARIANT_TYPE_DOUBLE;
		cmd = SCPI_CMD_GET_VOLTAGE_TARGET;
		break;
	case SR_CONF_OUTPUT_CURRENT:
		gvtype = G_VARIANT_TYPE_DOUBLE;
		cmd = SCPI_CMD_GET_MEAS_CURRENT;
		break;
	case SR_CONF_OUTPUT_CURRENT_LIMIT:
		gvtype = G_VARIANT_TYPE_DOUBLE;
		cmd = SCPI_CMD_GET_CURRENT_LIMIT;
		break;
	case SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED:
		gvtype = G_VARIANT_TYPE_BOOLEAN;
		cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ENABLED;
		break;
	case SR_CONF_OVER_VOLTAGE_PROTECTION_ACTIVE:
		gvtype = G_VARIANT_TYPE_BOOLEAN;
		cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ACTIVE;
		break;
	case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
		gvtype = G_VARIANT_TYPE_DOUBLE;
		cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_THRESHOLD;
		break;
	case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
		gvtype = G_VARIANT_TYPE_BOOLEAN;
		cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ENABLED;
		break;
	case SR_CONF_OVER_CURRENT_PROTECTION_ACTIVE:
		gvtype = G_VARIANT_TYPE_BOOLEAN;
		cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ACTIVE;
		break;
	case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
		gvtype = G_VARIANT_TYPE_DOUBLE;
		cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_THRESHOLD;
		break;
	case SR_CONF_OVER_TEMPERATURE_PROTECTION:
		gvtype = G_VARIANT_TYPE_BOOLEAN;
		cmd = SCPI_CMD_GET_OVER_TEMPERATURE_PROTECTION;
		break;
	case SR_CONF_OUTPUT_REGULATION:
		gvtype = G_VARIANT_TYPE_STRING;
		cmd = SCPI_CMD_GET_OUTPUT_REGULATION;
	}
	if (gvtype) {
		if (cg)
			select_channel(sdi, cg->channels->data);
		ret = scpi_cmd_resp(sdi, data, gvtype, cmd);
	} else
		ret = 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)
{
	double d;
	int ret;

	if (!sdi)
		return SR_ERR_ARG;

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

	if (cg)
		/* Channel group specified. */
		select_channel(sdi, cg->channels->data);

	ret = SR_OK;
	switch (key) {
	case SR_CONF_OUTPUT_ENABLED:
		if (g_variant_get_boolean(data))
			ret = scpi_cmd(sdi, SCPI_CMD_SET_OUTPUT_ENABLE);
		else
			ret = scpi_cmd(sdi, SCPI_CMD_SET_OUTPUT_DISABLE);
		break;
	case SR_CONF_OUTPUT_VOLTAGE_TARGET:
		d = g_variant_get_double(data);
		ret = scpi_cmd(sdi, SCPI_CMD_SET_VOLTAGE_TARGET, d);
		break;
	case SR_CONF_OUTPUT_CURRENT_LIMIT:
		d = g_variant_get_double(data);
		ret = scpi_cmd(sdi, SCPI_CMD_SET_CURRENT_LIMIT, d);
		break;
	case SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED:
		if (g_variant_get_boolean(data))
			ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_ENABLE);
		else
			ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_DISABLE);
		break;
	case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
		d = g_variant_get_double(data);
		ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_THRESHOLD, d);
		break;
	case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
		if (g_variant_get_boolean(data))
			ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_CURRENT_PROTECTION_ENABLE);
		else
			ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_CURRENT_PROTECTION_DISABLE);
		break;
	case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
		d = g_variant_get_double(data);
		ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_CURRENT_PROTECTION_THRESHOLD, d);
		break;
	case SR_CONF_OVER_TEMPERATURE_PROTECTION:
		if (g_variant_get_boolean(data))
			ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_ENABLE);
		else
			ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_DISABLE);
		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)
{
	struct dev_context *devc;
	struct sr_channel *ch;
	const struct channel_spec *ch_spec;
	GVariant *gvar;
	GVariantBuilder gvb;
	int ret, i;
	const char *s[16];

	/* Always available, even without sdi. */
	if (key == SR_CONF_SCAN_OPTIONS) {
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
		return SR_OK;
	} else if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
		return SR_OK;
	}

	if (!sdi)
		return SR_ERR_ARG;
	devc = sdi->priv;

	ret = SR_OK;
	if (!cg) {
		/* No channel group: global options. */
		switch (key) {
		case SR_CONF_DEVICE_OPTIONS:
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
					devc->device->devopts, devc->device->num_devopts,
					sizeof(uint32_t));
			break;
		case SR_CONF_OUTPUT_CHANNEL_CONFIG:
			/* Not used. */
			i = 0;
			if (devc->device->features & PPS_INDEPENDENT)
				s[i++] = "Independent";
			if (devc->device->features & PPS_SERIES)
				s[i++] = "Series";
			if (devc->device->features & PPS_PARALLEL)
				s[i++] = "Parallel";
			if (i == 0) {
				/*
				 * Shouldn't happen: independent-only devices
				 * shouldn't advertise this option at all.
				 */
				return SR_ERR_NA;
			}
			*data = g_variant_new_strv(s, i);
			break;
		default:
			return SR_ERR_NA;
		}
	} else {
		/* Channel group specified. */
		/*
		 * Per-channel-group options depending on a channel are actually
		 * done with the first channel. Channel groups in PPS can have
		 * more than one channel, but they will typically be of equal
		 * specification for use in series or parallel mode.
		 */
		ch = cg->channels->data;

		switch (key) {
		case SR_CONF_DEVICE_OPTIONS:
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
					devc->device->devopts_cg, devc->device->num_devopts_cg,
					sizeof(uint32_t));
			break;
		case SR_CONF_OUTPUT_VOLTAGE_TARGET:
			ch_spec = &(devc->device->channels[ch->index]);
			g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
			/* Min, max, write resolution. */
			for (i = 0; i < 3; i++) {
				gvar = g_variant_new_double(ch_spec->voltage[i]);
				g_variant_builder_add_value(&gvb, gvar);
			}
			*data = g_variant_builder_end(&gvb);
			break;
		case SR_CONF_OUTPUT_CURRENT_LIMIT:
			g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
			/* Min, max, step. */
			for (i = 0; i < 3; i++) {
				ch_spec = &(devc->device->channels[ch->index]);
				gvar = g_variant_new_double(ch_spec->current[i]);
				g_variant_builder_add_value(&gvb, gvar);
			}
			*data = g_variant_builder_end(&gvb);
			break;
		default:
			return SR_ERR_NA;
		}
	}

	return ret;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi,
		void *cb_data)
{
	struct dev_context *devc;
	struct sr_scpi_dev_inst *scpi;
	struct sr_channel *ch;
	struct pps_channel *pch;
	int cmd, ret;

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

	devc = sdi->priv;
	scpi = sdi->conn;
	devc->cb_data = cb_data;

	if ((ret = sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 10,
			scpi_pps_receive_data, (void *)sdi)) != SR_OK)
		return ret;
	std_session_send_df_header(sdi, LOG_PREFIX);

	/* Prime the pipe with the first channel's fetch. */
	ch = next_enabled_channel(sdi, NULL);
	pch = ch->priv;
	if ((ret = select_channel(sdi, ch)) != SR_OK)
		return ret;
	if (pch->mq == SR_MQ_VOLTAGE)
		cmd = SCPI_CMD_GET_MEAS_VOLTAGE;
	else if (pch->mq == SR_MQ_CURRENT)
		cmd = SCPI_CMD_GET_MEAS_CURRENT;
	else if (pch->mq == SR_MQ_POWER)
		cmd = SCPI_CMD_GET_MEAS_POWER;
	else
		return SR_ERR;
	scpi_cmd(sdi, cmd, pch->hwname);

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
	struct sr_datafeed_packet packet;
	struct sr_scpi_dev_inst *scpi;
	float f;

	(void)cb_data;

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

	scpi = sdi->conn;

	/*
	 * A requested value is certainly on the way. Retrieve it now,
	 * to avoid leaving the device in a state where it's not expecting
	 * commands.
	 */
	sr_scpi_get_float(scpi, NULL, &f);
	sr_scpi_source_remove(sdi->session, scpi);

	packet.type = SR_DF_END;
	sr_session_send(sdi, &packet);

	return SR_OK;
}

SR_PRIV struct sr_dev_driver scpi_pps_driver_info = {
	.name = "scpi-pps",
	.longname = "SCPI PPS",
	.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,
	.priv = NULL,
};
Commit	Line	Data
ca1a7cb5 BV	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2014 Bert Vermeulen <bert@biot.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
9e45cd41	20	#include <string.h>
ba464a12	21	#include <strings.h>
ca1a7cb5 BV	22	#include "protocol.h"
	23
	24	SR_PRIV struct sr_dev_driver scpi_pps_driver_info;
d4eabea8 BV	25	extern unsigned int num_pps_profiles;
d4eabea8 BV	26	extern const struct scpi_pps pps_profiles[];
9e45cd41	27
584560f1	28	static const uint32_t scanopts[] = {
9e45cd41 BV	29	SR_CONF_CONN,
	30	SR_CONF_SERIALCOMM,
	31	};
ca1a7cb5	32
9d9cf1c4	33	static const uint32_t drvopts[] = {
a258204e	34	SR_CONF_POWER_SUPPLY,
a258204e BV	35	};
a258204e BV	36
329733d9	37	static const struct pps_channel_instance pci[] = {
01b0257a BV	38	{ SR_MQ_VOLTAGE, SCPI_CMD_GET_MEAS_VOLTAGE, "V" },
	39	{ SR_MQ_CURRENT, SCPI_CMD_GET_MEAS_CURRENT, "I" },
	40	{ SR_MQ_POWER, SCPI_CMD_GET_MEAS_POWER, "P" },
	41	};
	42
4f840ce9	43	static int init(struct sr_dev_driver di, struct sr_context sr_ctx)
ca1a7cb5 BV	44	{
	45	return std_init(sr_ctx, di, LOG_PREFIX);
	46	}
	47
9e45cd41	48	static struct sr_dev_inst probe_device(struct sr_scpi_dev_inst scpi)
ca1a7cb5	49	{
9e45cd41 BV	50	struct dev_context *devc;
	51	struct sr_dev_inst *sdi;
	52	struct sr_scpi_hw_info *hw_info;
	53	struct sr_channel_group *cg;
	54	struct sr_channel *ch;
	55	const struct scpi_pps *device;
01b0257a	56	struct pps_channel *pch;
4a471029 BV	57	struct channel_spec *channels;
4a471029 BV	58	struct channel_group_spec channel_groups, cgs;
9e45cd41	59	struct pps_channel_group *pcg;
58b77c41 BV	60	GRegex *model_re;
58b77c41 BV	61	GMatchInfo *model_mi;
01b0257a	62	GSList *l;
9e45cd41	63	uint64_t mask;
4a471029 BV	64	unsigned int num_channels, num_channel_groups, ch_num, ch_idx, i, j;
4a471029 BV	65	int ret;
22c18b03	66	const char *vendor;
01b0257a	67	char ch_name[16];
9e45cd41 BV	68
	69	if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
	70	sr_info("Couldn't get IDN response.");
	71	return NULL;
	72	}
	73
	74	device = NULL;
	75	for (i = 0; i < num_pps_profiles; i++) {
22c18b03	76	vendor = get_vendor(hw_info->manufacturer);
58b77c41	77	if (strcasecmp(vendor, pps_profiles[i].vendor))
22c18b03	78	continue;
58b77c41 BV	79	model_re = g_regex_new(pps_profiles[i].model, 0, 0, NULL);
58b77c41 BV	80	if (g_regex_match(model_re, hw_info->model, 0, &model_mi))
9e45cd41	81	device = &pps_profiles[i];
58b77c41 BV	82	g_match_info_unref(model_mi);
	83	g_regex_unref(model_re);
	84	if (device)
9e45cd41	85	break;
9e45cd41 BV	86	}
	87	if (!device) {
	88	sr_scpi_hw_info_free(hw_info);
	89	return NULL;
	90	}
	91
aac29cc1	92	sdi = g_malloc0(sizeof(struct sr_dev_inst));
7d4f1741	93	sdi->status = SR_ST_INACTIVE;
0af636be UH	94	sdi->vendor = g_strdup(vendor);
	95	sdi->model = g_strdup(hw_info->model);
	96	sdi->version = g_strdup(hw_info->firmware_version);
9e45cd41	97	sdi->conn = scpi;
4f840ce9	98	sdi->driver = &scpi_pps_driver_info;
9e45cd41	99	sdi->inst_type = SR_INST_SCPI;
d08667c5 SA	100	sdi->serial_num = g_strdup(hw_info->serial_number);
d08667c5 SA	101
9e45cd41 BV	102	devc = g_malloc0(sizeof(struct dev_context));
	103	devc->device = device;
	104	sdi->priv = devc;
	105
4a471029 BV	106	if (device->num_channels) {
4a471029 BV	107	/* Static channels and groups. */
329733d9	108	channels = (struct channel_spec *)device->channels;
4a471029	109	num_channels = device->num_channels;
329733d9	110	channel_groups = (struct channel_group_spec *)device->channel_groups;
4a471029 BV	111	num_channel_groups = device->num_channel_groups;
	112	} else {
	113	/* Channels and groups need to be probed. */
	114	ret = device->probe_channels(sdi, hw_info, &channels, &num_channels,
	115	&channel_groups, &num_channel_groups);
	116	if (ret != SR_OK) {
	117	sr_err("Failed to probe for channels.");
	118	return NULL;
	119	}
	120	/*
	121	* Since these were dynamically allocated, we'll need to free them
	122	* later.
	123	*/
	124	devc->channels = channels;
	125	devc->channel_groups = channel_groups;
	126	}
	127
01b0257a	128	ch_idx = 0;
4a471029	129	for (ch_num = 0; ch_num < num_channels; ch_num++) {
01b0257a	130	/* Create one channel per measurable output unit. */
01b0257a BV	131	for (i = 0; i < ARRAY_SIZE(pci); i++) {
	132	if (!scpi_cmd_get(sdi, pci[i].command))
	133	continue;
	134	g_snprintf(ch_name, 16, "%s%s", pci[i].prefix,
4a471029	135	channels[ch_num].name);
5e23fcab ML	136	ch = sr_channel_new(sdi, ch_idx++, SR_CHANNEL_ANALOG, TRUE,
5e23fcab ML	137	ch_name);
01b0257a BV	138	pch = g_malloc0(sizeof(struct pps_channel));
01b0257a BV	139	pch->hw_output_idx = ch_num;
4a471029	140	pch->hwname = channels[ch_num].name;
01b0257a BV	141	pch->mq = pci[i].mq;
01b0257a BV	142	ch->priv = pch;
01b0257a	143	}
9e45cd41	144	}
ca1a7cb5	145
4a471029 BV	146	for (i = 0; i < num_channel_groups; i++) {
4a471029 BV	147	cgs = &channel_groups[i];
9e45cd41 BV	148	cg = g_malloc0(sizeof(struct sr_channel_group));
	149	cg->name = g_strdup(cgs->name);
	150	for (j = 0, mask = 1; j < 64; j++, mask <<= 1) {
	151	if (cgs->channel_index_mask & mask) {
01b0257a BV	152	for (l = sdi->channels; l; l = l->next) {
	153	ch = l->data;
	154	pch = ch->priv;
	155	if (pch->hw_output_idx == j)
	156	cg->channels = g_slist_append(cg->channels, ch);
	157	}
9e45cd41 BV	158	}
	159	}
	160	pcg = g_malloc0(sizeof(struct pps_channel_group));
	161	pcg->features = cgs->features;
	162	cg->priv = pcg;
	163	sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
	164	}
ca1a7cb5	165
4a471029 BV	166	sr_scpi_hw_info_free(hw_info);
	167	hw_info = NULL;
	168
60475cd7	169	scpi_cmd(sdi, SCPI_CMD_LOCAL);
9e45cd41	170	sr_scpi_close(scpi);
ca1a7cb5	171
9e45cd41 BV	172	return sdi;
9e45cd41 BV	173	}
ca1a7cb5	174
4f840ce9	175	static GSList scan(struct sr_dev_driver di, GSList *options)
9e45cd41 BV	176	{
9e45cd41 BV	177	return sr_scpi_scan(di->priv, options, probe_device);
ca1a7cb5 BV	178	}
ca1a7cb5 BV	179
4f840ce9	180	static GSList dev_list(const struct sr_dev_driver di)
ca1a7cb5 BV	181	{
	182	return ((struct drv_context *)(di->priv))->instances;
	183	}
	184
4f840ce9	185	static int dev_clear(const struct sr_dev_driver *di)
ca1a7cb5 BV	186	{
	187	return std_dev_clear(di, NULL);
	188	}
	189
	190	static int dev_open(struct sr_dev_inst *sdi)
	191	{
ee2860ee	192	struct dev_context *devc;
9e45cd41	193	struct sr_scpi_dev_inst *scpi;
ee2860ee	194	GVariant *beeper;
9e45cd41	195
7d4f1741	196	if (sdi->status != SR_ST_INACTIVE)
9e45cd41	197	return SR_ERR;
ca1a7cb5	198
9e45cd41 BV	199	scpi = sdi->conn;
	200	if (sr_scpi_open(scpi) < 0)
	201	return SR_ERR;
ca1a7cb5 BV	202
	203	sdi->status = SR_ST_ACTIVE;
	204
60475cd7	205	scpi_cmd(sdi, SCPI_CMD_REMOTE);
ee2860ee BV	206	devc = sdi->priv;
	207	devc->beeper_was_set = FALSE;
	208	if (scpi_cmd_resp(sdi, &beeper, G_VARIANT_TYPE_BOOLEAN, SCPI_CMD_BEEPER) == SR_OK) {
	209	if (g_variant_get_boolean(beeper)) {
	210	devc->beeper_was_set = TRUE;
	211	scpi_cmd(sdi, SCPI_CMD_BEEPER_DISABLE);
	212	}
	213	g_variant_unref(beeper);
	214	}
60475cd7	215
ca1a7cb5 BV	216	return SR_OK;
	217	}
	218
	219	static int dev_close(struct sr_dev_inst *sdi)
	220	{
9e45cd41	221	struct sr_scpi_dev_inst *scpi;
ee2860ee	222	struct dev_context *devc;
ca1a7cb5	223
9e45cd41 BV	224	if (sdi->status != SR_ST_ACTIVE)
9e45cd41 BV	225	return SR_ERR_DEV_CLOSED;
ca1a7cb5	226
ee2860ee	227	devc = sdi->priv;
9e45cd41 BV	228	scpi = sdi->conn;
9e45cd41 BV	229	if (scpi) {
ee2860ee BV	230	if (devc->beeper_was_set)
ee2860ee BV	231	scpi_cmd(sdi, SCPI_CMD_BEEPER_ENABLE);
60475cd7	232	scpi_cmd(sdi, SCPI_CMD_LOCAL);
9e45cd41 BV	233	sr_scpi_close(scpi);
	234	sdi->status = SR_ST_INACTIVE;
	235	}
ca1a7cb5 BV	236
	237	return SR_OK;
	238	}
	239
4a471029 BV	240	static void clear_helper(void *priv)
	241	{
	242	struct dev_context *devc;
	243
	244	devc = priv;
	245	g_free(devc->channels);
	246	g_free(devc->channel_groups);
	247	g_free(devc);
	248	}
	249
4f840ce9	250	static int cleanup(const struct sr_dev_driver *di)
ca1a7cb5	251	{
4a471029	252	return std_dev_clear(di, clear_helper);
ca1a7cb5 BV	253	}
ca1a7cb5 BV	254
584560f1	255	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
ca1a7cb5 BV	256	const struct sr_channel_group *cg)
ca1a7cb5 BV	257	{
9e45cd41	258	struct dev_context *devc;
478c8d92 BV	259	const GVariantType *gvtype;
	260	unsigned int i;
	261	int cmd, ret;
ca1a7cb5	262
9e45cd41 BV	263	if (!sdi)
	264	return SR_ERR_ARG;
	265
	266	devc = sdi->priv;
ca1a7cb5	267
478c8d92	268	if (cg) {
9e45cd41 BV	269	/*
	270	* These options only apply to channel groups with a single
	271	* channel -- they're per-channel settings for the device.
	272	*/
478c8d92 BV	273
	274	/*
	275	* Config keys are handled below depending on whether a channel
	276	* group was provided by the frontend. However some of these
	277	* take a CG on one PPS but not on others. Check the device's
	278	* profile for that here, and NULL out the channel group as needed.
	279	*/
	280	for (i = 0; i < devc->device->num_devopts; i++) {
	281	if (devc->device->devopts[i] == key) {
	282	cg = NULL;
	283	break;
	284	}
	285	}
478c8d92	286	}
9e45cd41	287
478c8d92 BV	288	gvtype = NULL;
	289	cmd = -1;
	290	switch (key) {
	291	case SR_CONF_OUTPUT_ENABLED:
	292	gvtype = G_VARIANT_TYPE_BOOLEAN;
	293	cmd = SCPI_CMD_GET_OUTPUT_ENABLED;
	294	break;
	295	case SR_CONF_OUTPUT_VOLTAGE:
	296	gvtype = G_VARIANT_TYPE_DOUBLE;
	297	cmd = SCPI_CMD_GET_MEAS_VOLTAGE;
	298	break;
ca95e90f	299	case SR_CONF_OUTPUT_VOLTAGE_TARGET:
478c8d92	300	gvtype = G_VARIANT_TYPE_DOUBLE;
ca95e90f	301	cmd = SCPI_CMD_GET_VOLTAGE_TARGET;
478c8d92 BV	302	break;
	303	case SR_CONF_OUTPUT_CURRENT:
	304	gvtype = G_VARIANT_TYPE_DOUBLE;
	305	cmd = SCPI_CMD_GET_MEAS_CURRENT;
	306	break;
ca95e90f	307	case SR_CONF_OUTPUT_CURRENT_LIMIT:
478c8d92	308	gvtype = G_VARIANT_TYPE_DOUBLE;
ca95e90f	309	cmd = SCPI_CMD_GET_CURRENT_LIMIT;
478c8d92 BV	310	break;
	311	case SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED:
	312	gvtype = G_VARIANT_TYPE_BOOLEAN;
	313	cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ENABLED;
	314	break;
	315	case SR_CONF_OVER_VOLTAGE_PROTECTION_ACTIVE:
	316	gvtype = G_VARIANT_TYPE_BOOLEAN;
	317	cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ACTIVE;
	318	break;
	319	case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
	320	gvtype = G_VARIANT_TYPE_DOUBLE;
	321	cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_THRESHOLD;
	322	break;
	323	case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
	324	gvtype = G_VARIANT_TYPE_BOOLEAN;
	325	cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ENABLED;
	326	break;
	327	case SR_CONF_OVER_CURRENT_PROTECTION_ACTIVE:
	328	gvtype = G_VARIANT_TYPE_BOOLEAN;
	329	cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ACTIVE;
	330	break;
	331	case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
	332	gvtype = G_VARIANT_TYPE_DOUBLE;
	333	cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_THRESHOLD;
	334	break;
	335	case SR_CONF_OVER_TEMPERATURE_PROTECTION:
	336	gvtype = G_VARIANT_TYPE_BOOLEAN;
	337	cmd = SCPI_CMD_GET_OVER_TEMPERATURE_PROTECTION;
	338	break;
60475cd7 BV	339	case SR_CONF_OUTPUT_REGULATION:
	340	gvtype = G_VARIANT_TYPE_STRING;
	341	cmd = SCPI_CMD_GET_OUTPUT_REGULATION;
478c8d92 BV	342	}
	343	if (gvtype) {
	344	if (cg)
60475cd7 BV	345	select_channel(sdi, cg->channels->data);
60475cd7 BV	346	ret = scpi_cmd_resp(sdi, data, gvtype, cmd);
478c8d92 BV	347	} else
478c8d92 BV	348	ret = SR_ERR_NA;
ca1a7cb5 BV	349
	350	return ret;
	351	}
	352
584560f1	353	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
ca1a7cb5 BV	354	const struct sr_channel_group *cg)
ca1a7cb5 BV	355	{
9e45cd41	356	double d;
ca1a7cb5	357	int ret;
ca1a7cb5	358
fdedbfcd BV	359	if (!sdi)
	360	return SR_ERR_ARG;
	361
ca1a7cb5 BV	362	if (sdi->status != SR_ST_ACTIVE)
	363	return SR_ERR_DEV_CLOSED;
	364
60475cd7	365	if (cg)
9e45cd41	366	/* Channel group specified. */
60475cd7 BV	367	select_channel(sdi, cg->channels->data);
	368
	369	ret = SR_OK;
	370	switch (key) {
	371	case SR_CONF_OUTPUT_ENABLED:
	372	if (g_variant_get_boolean(data))
	373	ret = scpi_cmd(sdi, SCPI_CMD_SET_OUTPUT_ENABLE);
	374	else
	375	ret = scpi_cmd(sdi, SCPI_CMD_SET_OUTPUT_DISABLE);
	376	break;
	377	case SR_CONF_OUTPUT_VOLTAGE_TARGET:
	378	d = g_variant_get_double(data);
	379	ret = scpi_cmd(sdi, SCPI_CMD_SET_VOLTAGE_TARGET, d);
	380	break;
	381	case SR_CONF_OUTPUT_CURRENT_LIMIT:
	382	d = g_variant_get_double(data);
	383	ret = scpi_cmd(sdi, SCPI_CMD_SET_CURRENT_LIMIT, d);
	384	break;
	385	case SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED:
	386	if (g_variant_get_boolean(data))
	387	ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_ENABLE);
	388	else
	389	ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_DISABLE);
	390	break;
	391	case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
	392	d = g_variant_get_double(data);
	393	ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_THRESHOLD, d);
	394	break;
	395	case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
	396	if (g_variant_get_boolean(data))
	397	ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_CURRENT_PROTECTION_ENABLE);
	398	else
	399	ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_CURRENT_PROTECTION_DISABLE);
	400	break;
	401	case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
	402	d = g_variant_get_double(data);
	403	ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_CURRENT_PROTECTION_THRESHOLD, d);
	404	break;
	405	case SR_CONF_OVER_TEMPERATURE_PROTECTION:
	406	if (g_variant_get_boolean(data))
	407	ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_ENABLE);
	408	else
	409	ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_DISABLE);
	410	break;
	411	default:
	412	ret = SR_ERR_NA;
ca1a7cb5 BV	413	}
	414
	415	return ret;
	416	}
	417
584560f1	418	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
ca1a7cb5 BV	419	const struct sr_channel_group *cg)
ca1a7cb5 BV	420	{
9e45cd41 BV	421	struct dev_context *devc;
9e45cd41 BV	422	struct sr_channel *ch;
329733d9	423	const struct channel_spec *ch_spec;
9e45cd41 BV	424	GVariant *gvar;
	425	GVariantBuilder gvb;
	426	int ret, i;
	427	const char *s[16];
	428
	429	/* Always available, even without sdi. */
	430	if (key == SR_CONF_SCAN_OPTIONS) {
584560f1 BV	431	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	432	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
9e45cd41	433	return SR_OK;
a258204e BV	434	} else if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
a258204e BV	435	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
9d9cf1c4	436	drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
a258204e	437	return SR_OK;
9e45cd41	438	}
ca1a7cb5	439
9e45cd41 BV	440	if (!sdi)
	441	return SR_ERR_ARG;
	442	devc = sdi->priv;
ca1a7cb5 BV	443
ca1a7cb5 BV	444	ret = SR_OK;
9e45cd41 BV	445	if (!cg) {
	446	/* No channel group: global options. */
	447	switch (key) {
	448	case SR_CONF_DEVICE_OPTIONS:
584560f1	449	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
9e45cd41	450	devc->device->devopts, devc->device->num_devopts,
584560f1	451	sizeof(uint32_t));
9e45cd41 BV	452	break;
9e45cd41 BV	453	case SR_CONF_OUTPUT_CHANNEL_CONFIG:
478c8d92	454	/* Not used. */
9e45cd41 BV	455	i = 0;
	456	if (devc->device->features & PPS_INDEPENDENT)
	457	s[i++] = "Independent";
	458	if (devc->device->features & PPS_SERIES)
	459	s[i++] = "Series";
	460	if (devc->device->features & PPS_PARALLEL)
	461	s[i++] = "Parallel";
	462	if (i == 0) {
	463	/*
	464	* Shouldn't happen: independent-only devices
	465	* shouldn't advertise this option at all.
	466	*/
	467	return SR_ERR_NA;
	468	}
	469	*data = g_variant_new_strv(s, i);
	470	break;
	471	default:
	472	return SR_ERR_NA;
	473	}
	474	} else {
	475	/* Channel group specified. */
9e45cd41 BV	476	/*
	477	* Per-channel-group options depending on a channel are actually
	478	* done with the first channel. Channel groups in PPS can have
	479	* more than one channel, but they will typically be of equal
01b0257a	480	* specification for use in series or parallel mode.
9e45cd41	481	*/
9e45cd41 BV	482	ch = cg->channels->data;
	483
	484	switch (key) {
	485	case SR_CONF_DEVICE_OPTIONS:
584560f1	486	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
9e45cd41	487	devc->device->devopts_cg, devc->device->num_devopts_cg,
584560f1	488	sizeof(uint32_t));
9e45cd41	489	break;
ca95e90f	490	case SR_CONF_OUTPUT_VOLTAGE_TARGET:
9e45cd41 BV	491	ch_spec = &(devc->device->channels[ch->index]);
	492	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
	493	/* Min, max, write resolution. */
	494	for (i = 0; i < 3; i++) {
	495	gvar = g_variant_new_double(ch_spec->voltage[i]);
	496	g_variant_builder_add_value(&gvb, gvar);
	497	}
	498	*data = g_variant_builder_end(&gvb);
	499	break;
ca95e90f	500	case SR_CONF_OUTPUT_CURRENT_LIMIT:
9e45cd41 BV	501	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
	502	/* Min, max, step. */
	503	for (i = 0; i < 3; i++) {
	504	ch_spec = &(devc->device->channels[ch->index]);
	505	gvar = g_variant_new_double(ch_spec->current[i]);
	506	g_variant_builder_add_value(&gvb, gvar);
	507	}
	508	*data = g_variant_builder_end(&gvb);
	509	break;
	510	default:
	511	return SR_ERR_NA;
	512	}
ca1a7cb5 BV	513	}
	514
	515	return ret;
	516	}
	517
	518	static int dev_acquisition_start(const struct sr_dev_inst *sdi,
9e45cd41	519	void *cb_data)
ca1a7cb5	520	{
9e45cd41 BV	521	struct dev_context *devc;
	522	struct sr_scpi_dev_inst *scpi;
	523	struct sr_channel *ch;
01b0257a BV	524	struct pps_channel *pch;
01b0257a BV	525	int cmd, ret;
ca1a7cb5 BV	526
	527	if (sdi->status != SR_ST_ACTIVE)
	528	return SR_ERR_DEV_CLOSED;
	529
9e45cd41 BV	530	devc = sdi->priv;
	531	scpi = sdi->conn;
	532	devc->cb_data = cb_data;
	533
01b0257a	534	if ((ret = sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 10,
9e45cd41 BV	535	scpi_pps_receive_data, (void *)sdi)) != SR_OK)
	536	return ret;
	537	std_session_send_df_header(sdi, LOG_PREFIX);
	538
01b0257a	539	/* Prime the pipe with the first channel's fetch. */
984e4b0d	540	ch = next_enabled_channel(sdi, NULL);
01b0257a	541	pch = ch->priv;
984e4b0d BV	542	if ((ret = select_channel(sdi, ch)) != SR_OK)
984e4b0d BV	543	return ret;
01b0257a BV	544	if (pch->mq == SR_MQ_VOLTAGE)
	545	cmd = SCPI_CMD_GET_MEAS_VOLTAGE;
	546	else if (pch->mq == SR_MQ_CURRENT)
	547	cmd = SCPI_CMD_GET_MEAS_CURRENT;
	548	else if (pch->mq == SR_MQ_POWER)
	549	cmd = SCPI_CMD_GET_MEAS_POWER;
	550	else
	551	return SR_ERR;
	552	scpi_cmd(sdi, cmd, pch->hwname);
ca1a7cb5 BV	553
	554	return SR_OK;
	555	}
	556
	557	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	558	{
bf48cceb	559	struct sr_datafeed_packet packet;
9e45cd41 BV	560	struct sr_scpi_dev_inst *scpi;
	561	float f;
	562
ca1a7cb5 BV	563	(void)cb_data;
	564
	565	if (sdi->status != SR_ST_ACTIVE)
	566	return SR_ERR_DEV_CLOSED;
	567
9e45cd41 BV	568	scpi = sdi->conn;
	569
	570	/*
	571	* A requested value is certainly on the way. Retrieve it now,
	572	* to avoid leaving the device in a state where it's not expecting
	573	* commands.
	574	*/
	575	sr_scpi_get_float(scpi, NULL, &f);
	576	sr_scpi_source_remove(sdi->session, scpi);
	577
bf48cceb BV	578	packet.type = SR_DF_END;
	579	sr_session_send(sdi, &packet);
	580
ca1a7cb5 BV	581	return SR_OK;
	582	}
	583
	584	SR_PRIV struct sr_dev_driver scpi_pps_driver_info = {
	585	.name = "scpi-pps",
	586	.longname = "SCPI PPS",
	587	.api_version = 1,
	588	.init = init,
	589	.cleanup = cleanup,
	590	.scan = scan,
	591	.dev_list = dev_list,
	592	.dev_clear = dev_clear,
	593	.config_get = config_get,
	594	.config_set = config_set,
	595	.config_list = config_list,
	596	.dev_open = dev_open,
	597	.dev_close = dev_close,
	598	.dev_acquisition_start = dev_acquisition_start,
	599	.dev_acquisition_stop = dev_acquisition_stop,
	600	.priv = NULL,
	601	};