[libsigrok.git] / src / hardware / hameg-hmo / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <config.h>
#include <stdlib.h>
#include "scpi.h"
#include "protocol.h"

static struct sr_dev_driver hameg_hmo_driver_info;

static const char *manufacturers[] = {
	"HAMEG",
	"Rohde&Schwarz",
};

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

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

enum {
	CG_INVALID = -1,
	CG_NONE,
	CG_ANALOG,
	CG_DIGITAL,
};

static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi)
{
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	struct sr_scpi_hw_info *hw_info;

	sdi = NULL;
	devc = NULL;
	hw_info = NULL;

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

	if (std_str_idx_s(hw_info->manufacturer, ARRAY_AND_SIZE(manufacturers)) < 0)
		goto fail;

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

	sr_scpi_hw_info_free(hw_info);
	hw_info = NULL;

	devc = g_malloc0(sizeof(struct dev_context));

	sdi->priv = devc;

	if (hmo_init_device(sdi) != SR_OK)
		goto fail;

	return sdi;

fail:
	sr_scpi_hw_info_free(hw_info);
	sr_dev_inst_free(sdi);
	g_free(devc);

	return NULL;
}

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

static void clear_helper(struct dev_context *devc)
{
	hmo_scope_state_free(devc->model_state);
	g_free(devc->analog_groups);
	g_free(devc->digital_groups);
}

static int dev_clear(const struct sr_dev_driver *di)
{
	return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper);
}

static int dev_open(struct sr_dev_inst *sdi)
{
	if (sr_scpi_open(sdi->conn) != SR_OK)
		return SR_ERR;

	if (hmo_scope_state_get(sdi) != SR_OK)
		return SR_ERR;

	return SR_OK;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	return sr_scpi_close(sdi->conn);
}

static int check_channel_group(struct dev_context *devc,
			     const struct sr_channel_group *cg)
{
	const struct scope_config *model;

	model = devc->model_config;

	if (!cg)
		return CG_NONE;

	if (std_cg_idx(cg, devc->analog_groups, model->analog_channels) >= 0)
		return CG_ANALOG;

	if (std_cg_idx(cg, devc->digital_groups, model->digital_pods) >= 0)
		return CG_DIGITAL;

	sr_err("Invalid channel group specified.");

	return CG_INVALID;
}

static int config_get(uint32_t key, GVariant **data,
	const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{
	int cg_type, idx;
	struct dev_context *devc;
	const struct scope_config *model;
	struct scope_state *state;

	if (!sdi)
		return SR_ERR_ARG;

	devc = sdi->priv;

	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
		return SR_ERR;

	model = devc->model_config;
	state = devc->model_state;

	switch (key) {
	case SR_CONF_NUM_HDIV:
		*data = g_variant_new_int32(model->num_xdivs);
		break;
	case SR_CONF_TIMEBASE:
		*data = g_variant_new("(tt)", (*model->timebases)[state->timebase][0],
				      (*model->timebases)[state->timebase][1]);
		break;
	case SR_CONF_NUM_VDIV:
		if (!cg)
			return SR_ERR_CHANNEL_GROUP;
		if (cg_type != CG_ANALOG)
			return SR_ERR_NA;
		if (std_cg_idx(cg, devc->analog_groups, model->analog_channels) < 0)
			return SR_ERR_ARG;
		*data = g_variant_new_int32(model->num_ydivs);
		break;
	case SR_CONF_VDIV:
		if (!cg)
			return SR_ERR_CHANNEL_GROUP;
		if (cg_type != CG_ANALOG)
			return SR_ERR_NA;
		if ((idx = std_cg_idx(cg, devc->analog_groups, model->analog_channels)) < 0)
			return SR_ERR_ARG;
		*data = g_variant_new("(tt)",
				      (*model->vdivs)[state->analog_channels[idx].vdiv][0],
				      (*model->vdivs)[state->analog_channels[idx].vdiv][1]);
		break;
	case SR_CONF_TRIGGER_SOURCE:
		*data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
		break;
	case SR_CONF_TRIGGER_SLOPE:
		*data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
		break;
	case SR_CONF_HORIZ_TRIGGERPOS:
		*data = g_variant_new_double(state->horiz_triggerpos);
		break;
	case SR_CONF_COUPLING:
		if (!cg)
			return SR_ERR_CHANNEL_GROUP;
		if (cg_type != CG_ANALOG)
			return SR_ERR_NA;
		if ((idx = std_cg_idx(cg, devc->analog_groups, model->analog_channels)) < 0)
			return SR_ERR_ARG;
		*data = g_variant_new_string((*model->coupling_options)[state->analog_channels[idx].coupling]);
		break;
	case SR_CONF_SAMPLERATE:
		*data = g_variant_new_uint64(state->sample_rate);
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int config_set(uint32_t key, GVariant *data,
	const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{
	int ret, cg_type, idx, j;
	char command[MAX_COMMAND_SIZE], float_str[30];
	struct dev_context *devc;
	const struct scope_config *model;
	struct scope_state *state;
	double tmp_d;
	gboolean update_sample_rate;

	if (!sdi)
		return SR_ERR_ARG;

	devc = sdi->priv;

	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
		return SR_ERR;

	model = devc->model_config;
	state = devc->model_state;
	update_sample_rate = FALSE;

	switch (key) {
	case SR_CONF_LIMIT_SAMPLES:
		devc->samples_limit = g_variant_get_uint64(data);
		ret = SR_OK;
		break;
	case SR_CONF_LIMIT_FRAMES:
		devc->frame_limit = g_variant_get_uint64(data);
		ret = SR_OK;
		break;
	case SR_CONF_TRIGGER_SOURCE:
		if ((idx = std_str_idx(data, *model->trigger_sources, model->num_trigger_sources)) < 0)
			return SR_ERR_ARG;
		state->trigger_source = idx;
		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
			   (*model->trigger_sources)[idx]);
		ret = sr_scpi_send(sdi->conn, command);
		break;
	case SR_CONF_VDIV:
		if (!cg)
			return SR_ERR_CHANNEL_GROUP;
		if ((idx = std_u64_tuple_idx(data, *model->vdivs, model->num_vdivs)) < 0)
			return SR_ERR_ARG;
		if ((j = std_cg_idx(cg, devc->analog_groups, model->analog_channels)) < 0)
			return SR_ERR_ARG;
		state->analog_channels[j].vdiv = idx;
		g_ascii_formatd(float_str, sizeof(float_str), "%E",
			(float) (*model->vdivs)[idx][0] / (*model->vdivs)[idx][1]);
		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
			   j + 1, float_str);
		if (sr_scpi_send(sdi->conn, command) != SR_OK ||
		    sr_scpi_get_opc(sdi->conn) != SR_OK)
			return SR_ERR;
		ret = SR_OK;
		break;
	case SR_CONF_TIMEBASE:
		if ((idx = std_u64_tuple_idx(data, *model->timebases, model->num_timebases)) < 0)
			return SR_ERR_ARG;
		state->timebase = idx;
		g_ascii_formatd(float_str, sizeof(float_str), "%E",
			(float) (*model->timebases)[idx][0] / (*model->timebases)[idx][1]);
		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
			   float_str);
		ret = sr_scpi_send(sdi->conn, command);
		update_sample_rate = TRUE;
		break;
	case SR_CONF_HORIZ_TRIGGERPOS:
		tmp_d = g_variant_get_double(data);
		if (tmp_d < 0.0 || tmp_d > 1.0)
			return SR_ERR;
		state->horiz_triggerpos = tmp_d;
		tmp_d = -(tmp_d - 0.5) *
			((double) (*model->timebases)[state->timebase][0] /
			(*model->timebases)[state->timebase][1])
			 * model->num_xdivs;
		g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
			   float_str);
		ret = sr_scpi_send(sdi->conn, command);
		break;
	case SR_CONF_TRIGGER_SLOPE:
		if ((idx = std_str_idx(data, *model->trigger_slopes, model->num_trigger_slopes)) < 0)
			return SR_ERR_ARG;
		state->trigger_slope = idx;
		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
			   (*model->trigger_slopes)[idx]);
		ret = sr_scpi_send(sdi->conn, command);
		break;
	case SR_CONF_COUPLING:
		if (!cg)
			return SR_ERR_CHANNEL_GROUP;
		if ((idx = std_str_idx(data, *model->coupling_options, model->num_coupling_options)) < 0)
			return SR_ERR_ARG;
		if ((j = std_cg_idx(cg, devc->analog_groups, model->analog_channels)) < 0)
			return SR_ERR_ARG;
		state->analog_channels[j].coupling = idx;
		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
			   j + 1, (*model->coupling_options)[idx]);
		if (sr_scpi_send(sdi->conn, command) != SR_OK ||
		    sr_scpi_get_opc(sdi->conn) != SR_OK)
			return SR_ERR;
		ret = SR_OK;
		break;
	default:
		ret = SR_ERR_NA;
		break;
	}

	if (ret == SR_OK)
		ret = sr_scpi_get_opc(sdi->conn);

	if (ret == SR_OK && update_sample_rate)
		ret = hmo_update_sample_rate(sdi);

	return ret;
}

static int config_list(uint32_t key, GVariant **data,
	const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{
	int cg_type = CG_NONE;
	struct dev_context *devc = NULL;
	const struct scope_config *model = NULL;

	if (sdi) {
		devc = sdi->priv;
		if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
			return SR_ERR;

		model = devc->model_config;
	}

	switch (key) {
	case SR_CONF_SCAN_OPTIONS:
		*data = std_gvar_array_u32(ARRAY_AND_SIZE(scanopts));
		break;
	case SR_CONF_DEVICE_OPTIONS:
		if (!cg) {
			if (model)
				*data = std_gvar_array_u32(*model->devopts, model->num_devopts);
			else
				*data = std_gvar_array_u32(ARRAY_AND_SIZE(drvopts));
		} else if (cg_type == CG_ANALOG) {
			*data = std_gvar_array_u32(*model->devopts_cg_analog, model->num_devopts_cg_analog);
		} else {
			*data = std_gvar_array_u32(NULL, 0);
		}
		break;
	case SR_CONF_COUPLING:
		if (!cg)
			return SR_ERR_CHANNEL_GROUP;
		if (!model)
			return SR_ERR_ARG;
		*data = g_variant_new_strv(*model->coupling_options, model->num_coupling_options);
		break;
	case SR_CONF_TRIGGER_SOURCE:
		if (!model)
			return SR_ERR_ARG;
		*data = g_variant_new_strv(*model->trigger_sources, model->num_trigger_sources);
		break;
	case SR_CONF_TRIGGER_SLOPE:
		if (!model)
			return SR_ERR_ARG;
		*data = g_variant_new_strv(*model->trigger_slopes, model->num_trigger_slopes);
		break;
	case SR_CONF_TIMEBASE:
		if (!model)
			return SR_ERR_ARG;
		*data = std_gvar_tuple_array(*model->timebases, model->num_timebases);
		break;
	case SR_CONF_VDIV:
		if (!cg)
			return SR_ERR_CHANNEL_GROUP;
		if (!model)
			return SR_ERR_ARG;
		*data = std_gvar_tuple_array(*model->vdivs, model->num_vdivs);
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
{
	char command[MAX_COMMAND_SIZE];
	struct sr_channel *ch;
	struct dev_context *devc;
	const struct scope_config *model;

	devc = sdi->priv;
	model = devc->model_config;

	ch = devc->current_channel->data;

	switch (ch->type) {
	case SR_CHANNEL_ANALOG:
		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
#ifdef WORDS_BIGENDIAN
			   "MSBF",
#else
			   "LSBF",
#endif
			   ch->index + 1);
		break;
	case SR_CHANNEL_LOGIC:
		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
			   ch->index < 8 ? 1 : 2);
		break;
	default:
		sr_err("Invalid channel type.");
		break;
	}

	return sr_scpi_send(sdi->conn, command);
}

static int hmo_check_channels(GSList *channels)
{
	GSList *l;
	struct sr_channel *ch;
	gboolean enabled_chan[MAX_ANALOG_CHANNEL_COUNT];
	gboolean enabled_pod[MAX_DIGITAL_GROUP_COUNT];
	size_t idx;

	/* Preset "not enabled" for all channels / pods. */
	for (idx = 0; idx < ARRAY_SIZE(enabled_chan); idx++)
		enabled_chan[idx] = FALSE;
	for (idx = 0; idx < ARRAY_SIZE(enabled_pod); idx++)
		enabled_pod[idx] = FALSE;

	/*
	 * Determine which channels / pods are required for the caller's
	 * specified configuration.
	 */
	for (l = channels; l; l = l->next) {
		ch = l->data;
		switch (ch->type) {
		case SR_CHANNEL_ANALOG:
			idx = ch->index;
			if (idx < ARRAY_SIZE(enabled_chan))
				enabled_chan[idx] = TRUE;
			break;
		case SR_CHANNEL_LOGIC:
			idx = ch->index / 8;
			if (idx < ARRAY_SIZE(enabled_pod))
				enabled_pod[idx] = TRUE;
			break;
		default:
			return SR_ERR;
		}
	}

	/*
	 * Check for resource conflicts. Some channels can be either
	 * analog or digital, but never both at the same time.
	 *
	 * Note that the constraints might depend on the specific model.
	 * These tests might need some adjustment when support for more
	 * models gets added to the driver.
	 */
	if (enabled_pod[0] && enabled_chan[2])
		return SR_ERR;
	if (enabled_pod[1] && enabled_chan[3])
		return SR_ERR;
	return SR_OK;
}

static int hmo_setup_channels(const struct sr_dev_inst *sdi)
{
	GSList *l;
	unsigned int i;
	gboolean *pod_enabled, setup_changed;
	char command[MAX_COMMAND_SIZE];
	struct scope_state *state;
	const struct scope_config *model;
	struct sr_channel *ch;
	struct dev_context *devc;
	struct sr_scpi_dev_inst *scpi;
	int ret;

	devc = sdi->priv;
	scpi = sdi->conn;
	state = devc->model_state;
	model = devc->model_config;
	setup_changed = FALSE;

	pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);

	for (l = sdi->channels; l; l = l->next) {
		ch = l->data;
		switch (ch->type) {
		case SR_CHANNEL_ANALOG:
			if (ch->enabled == state->analog_channels[ch->index].state)
				break;
			g_snprintf(command, sizeof(command),
				   (*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
				   ch->index + 1, ch->enabled);

			if (sr_scpi_send(scpi, command) != SR_OK) {
				g_free(pod_enabled);
				return SR_ERR;
			}
			state->analog_channels[ch->index].state = ch->enabled;
			setup_changed = TRUE;
			break;
		case SR_CHANNEL_LOGIC:
			/*
			 * A digital POD needs to be enabled for every group of
			 * 8 channels.
			 */
			if (ch->enabled)
				pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;

			if (ch->enabled == state->digital_channels[ch->index])
				break;
			g_snprintf(command, sizeof(command),
				   (*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
				   ch->index, ch->enabled);

			if (sr_scpi_send(scpi, command) != SR_OK) {
				g_free(pod_enabled);
				return SR_ERR;
			}

			state->digital_channels[ch->index] = ch->enabled;
			setup_changed = TRUE;
			break;
		default:
			g_free(pod_enabled);
			return SR_ERR;
		}
	}

	ret = SR_OK;
	for (i = 0; i < model->digital_pods; i++) {
		if (state->digital_pods[i] == pod_enabled[i])
			continue;
		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
			   i + 1, pod_enabled[i]);
		if (sr_scpi_send(scpi, command) != SR_OK) {
			ret = SR_ERR;
			break;
		}
		state->digital_pods[i] = pod_enabled[i];
		setup_changed = TRUE;
	}
	g_free(pod_enabled);
	if (ret != SR_OK)
		return ret;

	if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
		return SR_ERR;

	return SR_OK;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi)
{
	GSList *l;
	gboolean digital_added[MAX_DIGITAL_GROUP_COUNT];
	size_t group, pod_count;
	struct sr_channel *ch;
	struct dev_context *devc;
	struct sr_scpi_dev_inst *scpi;
	int ret;

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

	devc->num_samples = 0;
	devc->num_frames = 0;

	/* Preset empty results. */
	for (group = 0; group < ARRAY_SIZE(digital_added); group++)
		digital_added[group] = FALSE;
	g_slist_free(devc->enabled_channels);
	devc->enabled_channels = NULL;

	/*
	 * Contruct the list of enabled channels. Determine the highest
	 * number of digital pods involved in the acquisition.
	 */
	pod_count = 0;
	for (l = sdi->channels; l; l = l->next) {
		ch = l->data;
		if (!ch->enabled)
			continue;
		/* Only add a single digital channel per group (pod). */
		group = ch->index / 8;
		if (ch->type != SR_CHANNEL_LOGIC || !digital_added[group]) {
			devc->enabled_channels = g_slist_append(
					devc->enabled_channels, ch);
			if (ch->type == SR_CHANNEL_LOGIC) {
				digital_added[group] = TRUE;
				if (pod_count < group + 1)
					pod_count = group + 1;
			}
		}
	}
	if (!devc->enabled_channels)
		return SR_ERR;
	devc->pod_count = pod_count;
	devc->logic_data = NULL;

	/*
	 * Check constraints. Some channels can be either analog or
	 * digital, but not both at the same time.
	 */
	if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
		sr_err("Invalid channel configuration specified!");
		ret = SR_ERR_NA;
		goto free_enabled;
	}

	/*
	 * Configure the analog and digital channels and the
	 * corresponding digital pods.
	 */
	if (hmo_setup_channels(sdi) != SR_OK) {
		sr_err("Failed to setup channel configuration!");
		ret = SR_ERR;
		goto free_enabled;
	}

	/*
	 * Start acquisition on the first enabled channel. The
	 * receive routine will continue driving the acquisition.
	 */
	sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
			hmo_receive_data, (void *)sdi);

	std_session_send_df_header(sdi);

	devc->current_channel = devc->enabled_channels;

	return hmo_request_data(sdi);

free_enabled:
	g_slist_free(devc->enabled_channels);
	devc->enabled_channels = NULL;
	return ret;
}

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

	std_session_send_df_end(sdi);

	devc = sdi->priv;

	devc->num_samples = 0;
	devc->num_frames = 0;
	g_slist_free(devc->enabled_channels);
	devc->enabled_channels = NULL;
	scpi = sdi->conn;
	sr_scpi_source_remove(sdi->session, scpi);

	return SR_OK;
}

static struct sr_dev_driver hameg_hmo_driver_info = {
	.name = "hameg-hmo",
	.longname = "Hameg HMO",
	.api_version = 1,
	.init = std_init,
	.cleanup = std_cleanup,
	.scan = scan,
	.dev_list = std_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,
};
SR_REGISTER_DEV_DRIVER(hameg_hmo_driver_info);
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.com>
	5	*
	6	* This program is free software: you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation, either version 3 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include <config.h>
	21	#include <stdlib.h>
	22	#include "scpi.h"
	23	#include "protocol.h"
	24
	25	static struct sr_dev_driver hameg_hmo_driver_info;
	26
	27	static const char *manufacturers[] = {
	28	"HAMEG",
	29	"Rohde&Schwarz",
	30	};
	31
	32	static const uint32_t scanopts[] = {
	33	SR_CONF_CONN,
	34	SR_CONF_SERIALCOMM,
	35	};
	36
	37	static const uint32_t drvopts[] = {
	38	SR_CONF_OSCILLOSCOPE,
	39	};
	40
	41	enum {
	42	CG_INVALID = -1,
	43	CG_NONE,
	44	CG_ANALOG,
	45	CG_DIGITAL,
	46	};
	47
	48	static struct sr_dev_inst probe_device(struct sr_scpi_dev_inst scpi)
	49	{
	50	struct sr_dev_inst *sdi;
	51	struct dev_context *devc;
	52	struct sr_scpi_hw_info *hw_info;
	53
	54	sdi = NULL;
	55	devc = NULL;
	56	hw_info = NULL;
	57
	58	if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
	59	sr_info("Couldn't get IDN response.");
	60	goto fail;
	61	}
	62
	63	if (std_str_idx_s(hw_info->manufacturer, ARRAY_AND_SIZE(manufacturers)) < 0)
	64	goto fail;
	65
	66	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	67	sdi->vendor = g_strdup(hw_info->manufacturer);
	68	sdi->model = g_strdup(hw_info->model);
	69	sdi->version = g_strdup(hw_info->firmware_version);
	70	sdi->serial_num = g_strdup(hw_info->serial_number);
	71	sdi->driver = &hameg_hmo_driver_info;
	72	sdi->inst_type = SR_INST_SCPI;
	73	sdi->conn = scpi;
	74
	75	sr_scpi_hw_info_free(hw_info);
	76	hw_info = NULL;
	77
	78	devc = g_malloc0(sizeof(struct dev_context));
	79
	80	sdi->priv = devc;
	81
	82	if (hmo_init_device(sdi) != SR_OK)
	83	goto fail;
	84
	85	return sdi;
	86
	87	fail:
	88	sr_scpi_hw_info_free(hw_info);
	89	sr_dev_inst_free(sdi);
	90	g_free(devc);
	91
	92	return NULL;
	93	}
	94
	95	static GSList scan(struct sr_dev_driver di, GSList *options)
	96	{
	97	return sr_scpi_scan(di->context, options, probe_device);
	98	}
	99
	100	static void clear_helper(struct dev_context *devc)
	101	{
	102	hmo_scope_state_free(devc->model_state);
	103	g_free(devc->analog_groups);
	104	g_free(devc->digital_groups);
	105	}
	106
	107	static int dev_clear(const struct sr_dev_driver *di)
	108	{
	109	return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper);
	110	}
	111
	112	static int dev_open(struct sr_dev_inst *sdi)
	113	{
	114	if (sr_scpi_open(sdi->conn) != SR_OK)
	115	return SR_ERR;
	116
	117	if (hmo_scope_state_get(sdi) != SR_OK)
	118	return SR_ERR;
	119
	120	return SR_OK;
	121	}
	122
	123	static int dev_close(struct sr_dev_inst *sdi)
	124	{
	125	return sr_scpi_close(sdi->conn);
	126	}
	127
	128	static int check_channel_group(struct dev_context *devc,
	129	const struct sr_channel_group *cg)
	130	{
	131	const struct scope_config *model;
	132
	133	model = devc->model_config;
	134
	135	if (!cg)
	136	return CG_NONE;
	137
	138	if (std_cg_idx(cg, devc->analog_groups, model->analog_channels) >= 0)
	139	return CG_ANALOG;
	140
	141	if (std_cg_idx(cg, devc->digital_groups, model->digital_pods) >= 0)
	142	return CG_DIGITAL;
	143
	144	sr_err("Invalid channel group specified.");
	145
	146	return CG_INVALID;
	147	}
	148
	149	static int config_get(uint32_t key, GVariant **data,
	150	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
	151	{
	152	int cg_type, idx;
	153	struct dev_context *devc;
	154	const struct scope_config *model;
	155	struct scope_state *state;
	156
	157	if (!sdi)
	158	return SR_ERR_ARG;
	159
	160	devc = sdi->priv;
	161
	162	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
	163	return SR_ERR;
	164
	165	model = devc->model_config;
	166	state = devc->model_state;
	167
	168	switch (key) {
	169	case SR_CONF_NUM_HDIV:
	170	*data = g_variant_new_int32(model->num_xdivs);
	171	break;
	172	case SR_CONF_TIMEBASE:
	173	data = g_variant_new("(tt)", (model->timebases)[state->timebase][0],
	174	(*model->timebases)[state->timebase][1]);
	175	break;
	176	case SR_CONF_NUM_VDIV:
	177	if (!cg)
	178	return SR_ERR_CHANNEL_GROUP;
	179	if (cg_type != CG_ANALOG)
	180	return SR_ERR_NA;
	181	if (std_cg_idx(cg, devc->analog_groups, model->analog_channels) < 0)
	182	return SR_ERR_ARG;
	183	*data = g_variant_new_int32(model->num_ydivs);
	184	break;
	185	case SR_CONF_VDIV:
	186	if (!cg)
	187	return SR_ERR_CHANNEL_GROUP;
	188	if (cg_type != CG_ANALOG)
	189	return SR_ERR_NA;
	190	if ((idx = std_cg_idx(cg, devc->analog_groups, model->analog_channels)) < 0)
	191	return SR_ERR_ARG;
	192	*data = g_variant_new("(tt)",
	193	(*model->vdivs)[state->analog_channels[idx].vdiv][0],
	194	(*model->vdivs)[state->analog_channels[idx].vdiv][1]);
	195	break;
	196	case SR_CONF_TRIGGER_SOURCE:
	197	data = g_variant_new_string((model->trigger_sources)[state->trigger_source]);
	198	break;
	199	case SR_CONF_TRIGGER_SLOPE:
	200	data = g_variant_new_string((model->trigger_slopes)[state->trigger_slope]);
	201	break;
	202	case SR_CONF_HORIZ_TRIGGERPOS:
	203	*data = g_variant_new_double(state->horiz_triggerpos);
	204	break;
	205	case SR_CONF_COUPLING:
	206	if (!cg)
	207	return SR_ERR_CHANNEL_GROUP;
	208	if (cg_type != CG_ANALOG)
	209	return SR_ERR_NA;
	210	if ((idx = std_cg_idx(cg, devc->analog_groups, model->analog_channels)) < 0)
	211	return SR_ERR_ARG;
	212	data = g_variant_new_string((model->coupling_options)[state->analog_channels[idx].coupling]);
	213	break;
	214	case SR_CONF_SAMPLERATE:
	215	*data = g_variant_new_uint64(state->sample_rate);
	216	break;
	217	default:
	218	return SR_ERR_NA;
	219	}
	220
	221	return SR_OK;
	222	}
	223
	224	static int config_set(uint32_t key, GVariant *data,
	225	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
	226	{
	227	int ret, cg_type, idx, j;
	228	char command[MAX_COMMAND_SIZE], float_str[30];
	229	struct dev_context *devc;
	230	const struct scope_config *model;
	231	struct scope_state *state;
	232	double tmp_d;
	233	gboolean update_sample_rate;
	234
	235	if (!sdi)
	236	return SR_ERR_ARG;
	237
	238	devc = sdi->priv;
	239
	240	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
	241	return SR_ERR;
	242
	243	model = devc->model_config;
	244	state = devc->model_state;
	245	update_sample_rate = FALSE;
	246
	247	switch (key) {
	248	case SR_CONF_LIMIT_SAMPLES:
	249	devc->samples_limit = g_variant_get_uint64(data);
	250	ret = SR_OK;
	251	break;
	252	case SR_CONF_LIMIT_FRAMES:
	253	devc->frame_limit = g_variant_get_uint64(data);
	254	ret = SR_OK;
	255	break;
	256	case SR_CONF_TRIGGER_SOURCE:
	257	if ((idx = std_str_idx(data, *model->trigger_sources, model->num_trigger_sources)) < 0)
	258	return SR_ERR_ARG;
	259	state->trigger_source = idx;
	260	g_snprintf(command, sizeof(command),
	261	(*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
	262	(*model->trigger_sources)[idx]);
	263	ret = sr_scpi_send(sdi->conn, command);
	264	break;
	265	case SR_CONF_VDIV:
	266	if (!cg)
	267	return SR_ERR_CHANNEL_GROUP;
	268	if ((idx = std_u64_tuple_idx(data, *model->vdivs, model->num_vdivs)) < 0)
	269	return SR_ERR_ARG;
	270	if ((j = std_cg_idx(cg, devc->analog_groups, model->analog_channels)) < 0)
	271	return SR_ERR_ARG;
	272	state->analog_channels[j].vdiv = idx;
	273	g_ascii_formatd(float_str, sizeof(float_str), "%E",
	274	(float) (model->vdivs)[idx][0] / (model->vdivs)[idx][1]);
	275	g_snprintf(command, sizeof(command),
	276	(*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
	277	j + 1, float_str);
	278	if (sr_scpi_send(sdi->conn, command) != SR_OK \|\|
	279	sr_scpi_get_opc(sdi->conn) != SR_OK)
	280	return SR_ERR;
	281	ret = SR_OK;
	282	break;
	283	case SR_CONF_TIMEBASE:
	284	if ((idx = std_u64_tuple_idx(data, *model->timebases, model->num_timebases)) < 0)
	285	return SR_ERR_ARG;
	286	state->timebase = idx;
	287	g_ascii_formatd(float_str, sizeof(float_str), "%E",
	288	(float) (model->timebases)[idx][0] / (model->timebases)[idx][1]);
	289	g_snprintf(command, sizeof(command),
	290	(*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
	291	float_str);
	292	ret = sr_scpi_send(sdi->conn, command);
	293	update_sample_rate = TRUE;
	294	break;
	295	case SR_CONF_HORIZ_TRIGGERPOS:
	296	tmp_d = g_variant_get_double(data);
	297	if (tmp_d < 0.0 \|\| tmp_d > 1.0)
	298	return SR_ERR;
	299	state->horiz_triggerpos = tmp_d;
	300	tmp_d = -(tmp_d - 0.5) *
	301	((double) (*model->timebases)[state->timebase][0] /
	302	(*model->timebases)[state->timebase][1])
	303	* model->num_xdivs;
	304	g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
	305	g_snprintf(command, sizeof(command),
	306	(*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
	307	float_str);
	308	ret = sr_scpi_send(sdi->conn, command);
	309	break;
	310	case SR_CONF_TRIGGER_SLOPE:
	311	if ((idx = std_str_idx(data, *model->trigger_slopes, model->num_trigger_slopes)) < 0)
	312	return SR_ERR_ARG;
	313	state->trigger_slope = idx;
	314	g_snprintf(command, sizeof(command),
	315	(*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
	316	(*model->trigger_slopes)[idx]);
	317	ret = sr_scpi_send(sdi->conn, command);
	318	break;
	319	case SR_CONF_COUPLING:
	320	if (!cg)
	321	return SR_ERR_CHANNEL_GROUP;
	322	if ((idx = std_str_idx(data, *model->coupling_options, model->num_coupling_options)) < 0)
	323	return SR_ERR_ARG;
	324	if ((j = std_cg_idx(cg, devc->analog_groups, model->analog_channels)) < 0)
	325	return SR_ERR_ARG;
	326	state->analog_channels[j].coupling = idx;
	327	g_snprintf(command, sizeof(command),
	328	(*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
	329	j + 1, (*model->coupling_options)[idx]);
	330	if (sr_scpi_send(sdi->conn, command) != SR_OK \|\|
	331	sr_scpi_get_opc(sdi->conn) != SR_OK)
	332	return SR_ERR;
	333	ret = SR_OK;
	334	break;
	335	default:
	336	ret = SR_ERR_NA;
	337	break;
	338	}
	339
	340	if (ret == SR_OK)
	341	ret = sr_scpi_get_opc(sdi->conn);
	342
	343	if (ret == SR_OK && update_sample_rate)
	344	ret = hmo_update_sample_rate(sdi);
	345
	346	return ret;
	347	}
	348
	349	static int config_list(uint32_t key, GVariant **data,
	350	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
	351	{
	352	int cg_type = CG_NONE;
	353	struct dev_context *devc = NULL;
	354	const struct scope_config *model = NULL;
	355
	356	if (sdi) {
	357	devc = sdi->priv;
	358	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
	359	return SR_ERR;
	360
	361	model = devc->model_config;
	362	}
	363
	364	switch (key) {
	365	case SR_CONF_SCAN_OPTIONS:
	366	*data = std_gvar_array_u32(ARRAY_AND_SIZE(scanopts));
	367	break;
	368	case SR_CONF_DEVICE_OPTIONS:
	369	if (!cg) {
	370	if (model)
	371	data = std_gvar_array_u32(model->devopts, model->num_devopts);
	372	else
	373	*data = std_gvar_array_u32(ARRAY_AND_SIZE(drvopts));
	374	} else if (cg_type == CG_ANALOG) {
	375	data = std_gvar_array_u32(model->devopts_cg_analog, model->num_devopts_cg_analog);
	376	} else {
	377	*data = std_gvar_array_u32(NULL, 0);
	378	}
	379	break;
	380	case SR_CONF_COUPLING:
	381	if (!cg)
	382	return SR_ERR_CHANNEL_GROUP;
	383	if (!model)
	384	return SR_ERR_ARG;
	385	data = g_variant_new_strv(model->coupling_options, model->num_coupling_options);
	386	break;
	387	case SR_CONF_TRIGGER_SOURCE:
	388	if (!model)
	389	return SR_ERR_ARG;
	390	data = g_variant_new_strv(model->trigger_sources, model->num_trigger_sources);
	391	break;
	392	case SR_CONF_TRIGGER_SLOPE:
	393	if (!model)
	394	return SR_ERR_ARG;
	395	data = g_variant_new_strv(model->trigger_slopes, model->num_trigger_slopes);
	396	break;
	397	case SR_CONF_TIMEBASE:
	398	if (!model)
	399	return SR_ERR_ARG;
	400	data = std_gvar_tuple_array(model->timebases, model->num_timebases);
	401	break;
	402	case SR_CONF_VDIV:
	403	if (!cg)
	404	return SR_ERR_CHANNEL_GROUP;
	405	if (!model)
	406	return SR_ERR_ARG;
	407	data = std_gvar_tuple_array(model->vdivs, model->num_vdivs);
	408	break;
	409	default:
	410	return SR_ERR_NA;
	411	}
	412
	413	return SR_OK;
	414	}
	415
	416	SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
	417	{
	418	char command[MAX_COMMAND_SIZE];
	419	struct sr_channel *ch;
	420	struct dev_context *devc;
	421	const struct scope_config *model;
	422
	423	devc = sdi->priv;
	424	model = devc->model_config;
	425
	426	ch = devc->current_channel->data;
	427
	428	switch (ch->type) {
	429	case SR_CHANNEL_ANALOG:
	430	g_snprintf(command, sizeof(command),
	431	(*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
	432	#ifdef WORDS_BIGENDIAN
	433	"MSBF",
	434	#else
	435	"LSBF",
	436	#endif
	437	ch->index + 1);
	438	break;
	439	case SR_CHANNEL_LOGIC:
	440	g_snprintf(command, sizeof(command),
	441	(*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
	442	ch->index < 8 ? 1 : 2);
	443	break;
	444	default:
	445	sr_err("Invalid channel type.");
	446	break;
	447	}
	448
	449	return sr_scpi_send(sdi->conn, command);
	450	}
	451
	452	static int hmo_check_channels(GSList *channels)
	453	{
	454	GSList *l;
	455	struct sr_channel *ch;
	456	gboolean enabled_chan[MAX_ANALOG_CHANNEL_COUNT];
	457	gboolean enabled_pod[MAX_DIGITAL_GROUP_COUNT];
	458	size_t idx;
	459
	460	/* Preset "not enabled" for all channels / pods. */
	461	for (idx = 0; idx < ARRAY_SIZE(enabled_chan); idx++)
	462	enabled_chan[idx] = FALSE;
	463	for (idx = 0; idx < ARRAY_SIZE(enabled_pod); idx++)
	464	enabled_pod[idx] = FALSE;
	465
	466	/*
	467	* Determine which channels / pods are required for the caller's
	468	* specified configuration.
	469	*/
	470	for (l = channels; l; l = l->next) {
	471	ch = l->data;
	472	switch (ch->type) {
	473	case SR_CHANNEL_ANALOG:
	474	idx = ch->index;
	475	if (idx < ARRAY_SIZE(enabled_chan))
	476	enabled_chan[idx] = TRUE;
	477	break;
	478	case SR_CHANNEL_LOGIC:
	479	idx = ch->index / 8;
	480	if (idx < ARRAY_SIZE(enabled_pod))
	481	enabled_pod[idx] = TRUE;
	482	break;
	483	default:
	484	return SR_ERR;
	485	}
	486	}
	487
	488	/*
	489	* Check for resource conflicts. Some channels can be either
	490	* analog or digital, but never both at the same time.
	491	*
	492	* Note that the constraints might depend on the specific model.
	493	* These tests might need some adjustment when support for more
	494	* models gets added to the driver.
	495	*/
	496	if (enabled_pod[0] && enabled_chan[2])
	497	return SR_ERR;
	498	if (enabled_pod[1] && enabled_chan[3])
	499	return SR_ERR;
	500	return SR_OK;
	501	}
	502
	503	static int hmo_setup_channels(const struct sr_dev_inst *sdi)
	504	{
	505	GSList *l;
	506	unsigned int i;
	507	gboolean *pod_enabled, setup_changed;
	508	char command[MAX_COMMAND_SIZE];
	509	struct scope_state *state;
	510	const struct scope_config *model;
	511	struct sr_channel *ch;
	512	struct dev_context *devc;
	513	struct sr_scpi_dev_inst *scpi;
	514	int ret;
	515
	516	devc = sdi->priv;
	517	scpi = sdi->conn;
	518	state = devc->model_state;
	519	model = devc->model_config;
	520	setup_changed = FALSE;
	521
	522	pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
	523
	524	for (l = sdi->channels; l; l = l->next) {
	525	ch = l->data;
	526	switch (ch->type) {
	527	case SR_CHANNEL_ANALOG:
	528	if (ch->enabled == state->analog_channels[ch->index].state)
	529	break;
	530	g_snprintf(command, sizeof(command),
	531	(*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
	532	ch->index + 1, ch->enabled);
	533
	534	if (sr_scpi_send(scpi, command) != SR_OK) {
	535	g_free(pod_enabled);
	536	return SR_ERR;
	537	}
	538	state->analog_channels[ch->index].state = ch->enabled;
	539	setup_changed = TRUE;
	540	break;
	541	case SR_CHANNEL_LOGIC:
	542	/*
	543	* A digital POD needs to be enabled for every group of
	544	* 8 channels.
	545	*/
	546	if (ch->enabled)
	547	pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;
	548
	549	if (ch->enabled == state->digital_channels[ch->index])
	550	break;
	551	g_snprintf(command, sizeof(command),
	552	(*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
	553	ch->index, ch->enabled);
	554
	555	if (sr_scpi_send(scpi, command) != SR_OK) {
	556	g_free(pod_enabled);
	557	return SR_ERR;
	558	}
	559
	560	state->digital_channels[ch->index] = ch->enabled;
	561	setup_changed = TRUE;
	562	break;
	563	default:
	564	g_free(pod_enabled);
	565	return SR_ERR;
	566	}
	567	}
	568
	569	ret = SR_OK;
	570	for (i = 0; i < model->digital_pods; i++) {
	571	if (state->digital_pods[i] == pod_enabled[i])
	572	continue;
	573	g_snprintf(command, sizeof(command),
	574	(*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
	575	i + 1, pod_enabled[i]);
	576	if (sr_scpi_send(scpi, command) != SR_OK) {
	577	ret = SR_ERR;
	578	break;
	579	}
	580	state->digital_pods[i] = pod_enabled[i];
	581	setup_changed = TRUE;
	582	}
	583	g_free(pod_enabled);
	584	if (ret != SR_OK)
	585	return ret;
	586
	587	if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
	588	return SR_ERR;
	589
	590	return SR_OK;
	591	}
	592
	593	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
	594	{
	595	GSList *l;
	596	gboolean digital_added[MAX_DIGITAL_GROUP_COUNT];
	597	size_t group, pod_count;
	598	struct sr_channel *ch;
	599	struct dev_context *devc;
	600	struct sr_scpi_dev_inst *scpi;
	601	int ret;
	602
	603	scpi = sdi->conn;
	604	devc = sdi->priv;
	605
	606	devc->num_samples = 0;
	607	devc->num_frames = 0;
	608
	609	/* Preset empty results. */
	610	for (group = 0; group < ARRAY_SIZE(digital_added); group++)
	611	digital_added[group] = FALSE;
	612	g_slist_free(devc->enabled_channels);
	613	devc->enabled_channels = NULL;
	614
	615	/*
	616	* Contruct the list of enabled channels. Determine the highest
	617	* number of digital pods involved in the acquisition.
	618	*/
	619	pod_count = 0;
	620	for (l = sdi->channels; l; l = l->next) {
	621	ch = l->data;
	622	if (!ch->enabled)
	623	continue;
	624	/* Only add a single digital channel per group (pod). */
	625	group = ch->index / 8;
	626	if (ch->type != SR_CHANNEL_LOGIC \|\| !digital_added[group]) {
	627	devc->enabled_channels = g_slist_append(
	628	devc->enabled_channels, ch);
	629	if (ch->type == SR_CHANNEL_LOGIC) {
	630	digital_added[group] = TRUE;
	631	if (pod_count < group + 1)
	632	pod_count = group + 1;
	633	}
	634	}
	635	}
	636	if (!devc->enabled_channels)
	637	return SR_ERR;
	638	devc->pod_count = pod_count;
	639	devc->logic_data = NULL;
	640
	641	/*
	642	* Check constraints. Some channels can be either analog or
	643	* digital, but not both at the same time.
	644	*/
	645	if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
	646	sr_err("Invalid channel configuration specified!");
	647	ret = SR_ERR_NA;
	648	goto free_enabled;
	649	}
	650
	651	/*
	652	* Configure the analog and digital channels and the
	653	* corresponding digital pods.
	654	*/
	655	if (hmo_setup_channels(sdi) != SR_OK) {
	656	sr_err("Failed to setup channel configuration!");
	657	ret = SR_ERR;
	658	goto free_enabled;
	659	}
	660
	661	/*
	662	* Start acquisition on the first enabled channel. The
	663	* receive routine will continue driving the acquisition.
	664	*/
	665	sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
	666	hmo_receive_data, (void *)sdi);
	667
	668	std_session_send_df_header(sdi);
	669
	670	devc->current_channel = devc->enabled_channels;
	671
	672	return hmo_request_data(sdi);
	673
	674	free_enabled:
	675	g_slist_free(devc->enabled_channels);
	676	devc->enabled_channels = NULL;
	677	return ret;
	678	}
	679
	680	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
	681	{
	682	struct dev_context *devc;
	683	struct sr_scpi_dev_inst *scpi;
	684
	685	std_session_send_df_end(sdi);
	686
	687	devc = sdi->priv;
	688
	689	devc->num_samples = 0;
	690	devc->num_frames = 0;
	691	g_slist_free(devc->enabled_channels);
	692	devc->enabled_channels = NULL;
	693	scpi = sdi->conn;
	694	sr_scpi_source_remove(sdi->session, scpi);
	695
	696	return SR_OK;
	697	}
	698
	699	static struct sr_dev_driver hameg_hmo_driver_info = {
	700	.name = "hameg-hmo",
	701	.longname = "Hameg HMO",
	702	.api_version = 1,
	703	.init = std_init,
	704	.cleanup = std_cleanup,
	705	.scan = scan,
	706	.dev_list = std_dev_list,
	707	.dev_clear = dev_clear,
	708	.config_get = config_get,
	709	.config_set = config_set,
	710	.config_list = config_list,
	711	.dev_open = dev_open,
	712	.dev_close = dev_close,
	713	.dev_acquisition_start = dev_acquisition_start,
	714	.dev_acquisition_stop = dev_acquisition_stop,
	715	.context = NULL,
	716	};
	717	SR_REGISTER_DEV_DRIVER(hameg_hmo_driver_info);