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