[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"

#define SERIALCOMM "115200/8n1/flow=1"

SR_PRIV struct sr_dev_driver hameg_hmo_driver_info;

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

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

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

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

static int check_manufacturer(const char *manufacturer)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(manufacturers); i++)
		if (!strcmp(manufacturer, manufacturers[i]))
			return SR_OK;

	return SR_ERR;
}

static struct sr_dev_inst *hmo_probe_serial_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 (check_manufacturer(hw_info->manufacturer) != SR_OK)
		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:
	if (hw_info)
		sr_scpi_hw_info_free(hw_info);
	if (sdi)
		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, hmo_probe_serial_device);
}

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

	devc = priv;

	hmo_scope_state_free(devc->model_state);

	g_free(devc->analog_groups);
	g_free(devc->digital_groups);

	g_free(devc);
}

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

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

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

	sdi->status = SR_ST_ACTIVE;

	return SR_OK;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	if (sdi->status == SR_ST_INACTIVE)
		return SR_OK;

	sr_scpi_close(sdi->conn);

	sdi->status = SR_ST_INACTIVE;

	return SR_OK;
}

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

	model = devc->model_config;

	if (!cg)
		return CG_NONE;

	for (i = 0; i < model->analog_channels; i++)
		if (cg == devc->analog_groups[i])
			return CG_ANALOG;

	for (i = 0; i < model->digital_pods; i++)
		if (cg == devc->digital_groups[i])
			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 ret, cg_type;
	unsigned int i;
	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;

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

	switch (key) {
	case SR_CONF_NUM_HDIV:
		*data = g_variant_new_int32(model->num_xdivs);
		ret = SR_OK;
		break;
	case SR_CONF_TIMEBASE:
		*data = g_variant_new("(tt)", (*model->timebases)[state->timebase][0],
				      (*model->timebases)[state->timebase][1]);
		ret = SR_OK;
		break;
	case SR_CONF_NUM_VDIV:
		if (cg_type == CG_NONE) {
			sr_err("No channel group specified.");
			return SR_ERR_CHANNEL_GROUP;
		} else if (cg_type == CG_ANALOG) {
			for (i = 0; i < model->analog_channels; i++) {
				if (cg != devc->analog_groups[i])
					continue;
				*data = g_variant_new_int32(model->num_ydivs);
				ret = SR_OK;
				break;
			}

		} else {
			ret = SR_ERR_NA;
		}
		break;
	case SR_CONF_VDIV:
		if (cg_type == CG_NONE) {
			sr_err("No channel group specified.");
			return SR_ERR_CHANNEL_GROUP;
		} else if (cg_type == CG_ANALOG) {
			for (i = 0; i < model->analog_channels; i++) {
				if (cg != devc->analog_groups[i])
					continue;
				*data = g_variant_new("(tt)",
						      (*model->vdivs)[state->analog_channels[i].vdiv][0],
						      (*model->vdivs)[state->analog_channels[i].vdiv][1]);
				ret = SR_OK;
				break;
			}

		} else {
			ret = SR_ERR_NA;
		}
		break;
	case SR_CONF_TRIGGER_SOURCE:
		*data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
		ret = SR_OK;
		break;
	case SR_CONF_TRIGGER_SLOPE:
		*data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
		ret = SR_OK;
		break;
	case SR_CONF_HORIZ_TRIGGERPOS:
		*data = g_variant_new_double(state->horiz_triggerpos);
		ret = SR_OK;
		break;
	case SR_CONF_COUPLING:
		if (cg_type == CG_NONE) {
			sr_err("No channel group specified.");
			return SR_ERR_CHANNEL_GROUP;
		} else if (cg_type == CG_ANALOG) {
			for (i = 0; i < model->analog_channels; i++) {
				if (cg != devc->analog_groups[i])
					continue;
				*data = g_variant_new_string((*model->coupling_options)[state->analog_channels[i].coupling]);
				ret = SR_OK;
				break;
			}

		} else {
			ret = SR_ERR_NA;
		}
		break;
	case SR_CONF_SAMPLERATE:
		*data = g_variant_new_uint64(state->sample_rate);
		ret = SR_OK;
		break;
	default:
		ret = SR_ERR_NA;
	}

	return ret;
}

static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
{
	unsigned int i;
	GVariant *rational[2];
	GVariantBuilder gvb;

	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);

	for (i = 0; i < n; i++) {
		rational[0] = g_variant_new_uint64((*array)[i][0]);
		rational[1] = g_variant_new_uint64((*array)[i][1]);

		/* FIXME: Valgrind reports a memory leak here. */
		g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
	}

	return g_variant_builder_end(&gvb);
}

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;
	unsigned int i, j;
	char command[MAX_COMMAND_SIZE], float_str[30];
	struct dev_context *devc;
	const struct scope_config *model;
	struct scope_state *state;
	const char *tmp;
	uint64_t p, q;
	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;

	ret = SR_ERR_NA;

	switch (key) {
	case SR_CONF_LIMIT_FRAMES:
		devc->frame_limit = g_variant_get_uint64(data);
		ret = SR_OK;
		break;
	case SR_CONF_TRIGGER_SOURCE:
		tmp = g_variant_get_string(data, NULL);
		for (i = 0; (*model->trigger_sources)[i]; i++) {
			if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
				continue;
			state->trigger_source = i;
			g_snprintf(command, sizeof(command),
				   (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
				   (*model->trigger_sources)[i]);

			ret = sr_scpi_send(sdi->conn, command);
			break;
		}
		break;
	case SR_CONF_VDIV:
		if (cg_type == CG_NONE) {
			sr_err("No channel group specified.");
			return SR_ERR_CHANNEL_GROUP;
		}

		g_variant_get(data, "(tt)", &p, &q);

		for (i = 0; i < model->num_vdivs; i++) {
			if (p != (*model->vdivs)[i][0] ||
			    q != (*model->vdivs)[i][1])
				continue;
			for (j = 1; j <= model->analog_channels; j++) {
				if (cg != devc->analog_groups[j - 1])
					continue;
				state->analog_channels[j - 1].vdiv = i;
				g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
				g_snprintf(command, sizeof(command),
					   (*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
					   j, float_str);

				if (sr_scpi_send(sdi->conn, command) != SR_OK ||
				    sr_scpi_get_opc(sdi->conn) != SR_OK)
					return SR_ERR;

				break;
			}

			ret = SR_OK;
			break;
		}
		break;
	case SR_CONF_TIMEBASE:
		g_variant_get(data, "(tt)", &p, &q);

		for (i = 0; i < model->num_timebases; i++) {
			if (p != (*model->timebases)[i][0] ||
			    q != (*model->timebases)[i][1])
				continue;
			state->timebase = i;
			g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
			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;
		}
		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:
		tmp = g_variant_get_string(data, NULL);
		for (i = 0; (*model->trigger_slopes)[i]; i++) {
			if (g_strcmp0(tmp, (*model->trigger_slopes)[i]) != 0)
				continue;
			state->trigger_slope = i;
			g_snprintf(command, sizeof(command),
				   (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
				   (*model->trigger_slopes)[i]);

			ret = sr_scpi_send(sdi->conn, command);
			break;
		}
		break;
	case SR_CONF_COUPLING:
		if (cg_type == CG_NONE) {
			sr_err("No channel group specified.");
			return SR_ERR_CHANNEL_GROUP;
		}

		tmp = g_variant_get_string(data, NULL);

		for (i = 0; (*model->coupling_options)[i]; i++) {
			if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
				continue;
			for (j = 1; j <= model->analog_channels; j++) {
				if (cg != devc->analog_groups[j - 1])
					continue;
				state->analog_channels[j-1].coupling = i;

				g_snprintf(command, sizeof(command),
					   (*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
					   j, tmp);

				if (sr_scpi_send(sdi->conn, command) != SR_OK ||
				    sr_scpi_get_opc(sdi->conn) != SR_OK)
					return SR_ERR;
				break;
			}

			ret = SR_OK;
			break;
		}
		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 = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
		break;
	case SR_CONF_DEVICE_OPTIONS:
		if (cg_type == CG_NONE) {
			if (model)
				*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
					model->devopts, model->num_devopts, sizeof(uint32_t));
			else
				*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
					drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
		} else if (cg_type == CG_ANALOG) {
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				model->analog_devopts, model->num_analog_devopts,
				sizeof(uint32_t));
		} else {
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				NULL, 0, sizeof(uint32_t));
		}
		break;
	case SR_CONF_COUPLING:
		if (cg_type == CG_NONE)
			return SR_ERR_CHANNEL_GROUP;
		*data = g_variant_new_strv(*model->coupling_options,
			   g_strv_length((char **)*model->coupling_options));
		break;
	case SR_CONF_TRIGGER_SOURCE:
		if (!model)
			return SR_ERR_ARG;
		*data = g_variant_new_strv(*model->trigger_sources,
			   g_strv_length((char **)*model->trigger_sources));
		break;
	case SR_CONF_TRIGGER_SLOPE:
		if (!model)
			return SR_ERR_ARG;
		*data = g_variant_new_strv(*model->trigger_slopes,
			   g_strv_length((char **)*model->trigger_slopes));
		break;
	case SR_CONF_TIMEBASE:
		if (!model)
			return SR_ERR_ARG;
		*data = build_tuples(model->timebases, model->num_timebases);
		break;
	case SR_CONF_VDIV:
		if (cg_type == CG_NONE)
			return SR_ERR_CHANNEL_GROUP;
		*data = build_tuples(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],
			   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_pod1, enabled_pod2, enabled_chan3, enabled_chan4;

	enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;

	for (l = channels; l; l = l->next) {
		ch = l->data;
		switch (ch->type) {
		case SR_CHANNEL_ANALOG:
			if (ch->index == 2)
				enabled_chan3 = TRUE;
			else if (ch->index == 3)
				enabled_chan4 = TRUE;
			break;
		case SR_CHANNEL_LOGIC:
			if (ch->index < 8)
				enabled_pod1 = TRUE;
			else
				enabled_pod2 = TRUE;
			break;
		default:
			return SR_ERR;
		}
	}

	if ((enabled_pod1 && enabled_chan3) ||
	    (enabled_pod2 && enabled_chan4))
		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;

	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)
				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)
				return SR_ERR;

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

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

	g_free(pod_enabled);

	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;
	struct sr_channel *ch;
	struct dev_context *devc;
	struct sr_scpi_dev_inst *scpi;

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

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

	g_slist_free(devc->enabled_channels);
	devc->enabled_channels = NULL;

	for (l = sdi->channels; l; l = l->next) {
		ch = l->data;
		if (!ch->enabled)
			continue;
		/* Only add a single digital channel. */
		if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
			devc->enabled_channels = g_slist_append(
					devc->enabled_channels, ch);
			if (ch->type == SR_CHANNEL_LOGIC)
				digital_added = TRUE;
		}
	}

	if (!devc->enabled_channels)
		return SR_ERR;

	if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
		sr_err("Invalid channel configuration specified!");
		return SR_ERR_NA;
	}

	if (hmo_setup_channels(sdi) != SR_OK) {
		sr_err("Failed to setup channel configuration!");
		return SR_ERR;
	}

	sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
			hmo_receive_data, (void *)sdi);

	std_session_send_df_header(sdi, LOG_PREFIX);

	devc->current_channel = devc->enabled_channels;

	return hmo_request_data(sdi);
}

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, LOG_PREFIX);

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

	devc = sdi->priv;

	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;
}

SR_PRIV 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,
};
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	#define SERIALCOMM "115200/8n1/flow=1"
	26
	27	SR_PRIV struct sr_dev_driver hameg_hmo_driver_info;
	28
	29	static const char *manufacturers[] = {
	30	"HAMEG",
	31	"Rohde&Schwarz",
	32	};
	33
	34	static const uint32_t drvopts[] = {
	35	SR_CONF_OSCILLOSCOPE,
	36	};
	37
	38	static const uint32_t scanopts[] = {
	39	SR_CONF_CONN,
	40	SR_CONF_SERIALCOMM,
	41	};
	42
	43	enum {
	44	CG_INVALID = -1,
	45	CG_NONE,
	46	CG_ANALOG,
	47	CG_DIGITAL,
	48	};
	49
	50	static int check_manufacturer(const char *manufacturer)
	51	{
	52	unsigned int i;
	53
	54	for (i = 0; i < ARRAY_SIZE(manufacturers); i++)
	55	if (!strcmp(manufacturer, manufacturers[i]))
	56	return SR_OK;
	57
	58	return SR_ERR;
	59	}
	60
	61	static struct sr_dev_inst hmo_probe_serial_device(struct sr_scpi_dev_inst scpi)
	62	{
	63	struct sr_dev_inst *sdi;
	64	struct dev_context *devc;
	65	struct sr_scpi_hw_info *hw_info;
	66
	67	sdi = NULL;
	68	devc = NULL;
	69	hw_info = NULL;
	70
	71	if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
	72	sr_info("Couldn't get IDN response.");
	73	goto fail;
	74	}
	75
	76	if (check_manufacturer(hw_info->manufacturer) != SR_OK)
	77	goto fail;
	78
	79	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	80	sdi->vendor = g_strdup(hw_info->manufacturer);
	81	sdi->model = g_strdup(hw_info->model);
	82	sdi->version = g_strdup(hw_info->firmware_version);
	83	sdi->serial_num = g_strdup(hw_info->serial_number);
	84	sdi->driver = &hameg_hmo_driver_info;
	85	sdi->inst_type = SR_INST_SCPI;
	86	sdi->conn = scpi;
	87
	88	sr_scpi_hw_info_free(hw_info);
	89	hw_info = NULL;
	90
	91	devc = g_malloc0(sizeof(struct dev_context));
	92
	93	sdi->priv = devc;
	94
	95	if (hmo_init_device(sdi) != SR_OK)
	96	goto fail;
	97
	98	return sdi;
	99
	100	fail:
	101	if (hw_info)
	102	sr_scpi_hw_info_free(hw_info);
	103	if (sdi)
	104	sr_dev_inst_free(sdi);
	105	g_free(devc);
	106
	107	return NULL;
	108	}
	109
	110	static GSList scan(struct sr_dev_driver di, GSList *options)
	111	{
	112	return sr_scpi_scan(di->context, options, hmo_probe_serial_device);
	113	}
	114
	115	static void clear_helper(void *priv)
	116	{
	117	struct dev_context *devc;
	118
	119	devc = priv;
	120
	121	hmo_scope_state_free(devc->model_state);
	122
	123	g_free(devc->analog_groups);
	124	g_free(devc->digital_groups);
	125
	126	g_free(devc);
	127	}
	128
	129	static int dev_clear(const struct sr_dev_driver *di)
	130	{
	131	return std_dev_clear(di, clear_helper);
	132	}
	133
	134	static int dev_open(struct sr_dev_inst *sdi)
	135	{
	136	if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
	137	return SR_ERR;
	138
	139	if (hmo_scope_state_get(sdi) != SR_OK)
	140	return SR_ERR;
	141
	142	sdi->status = SR_ST_ACTIVE;
	143
	144	return SR_OK;
	145	}
	146
	147	static int dev_close(struct sr_dev_inst *sdi)
	148	{
	149	if (sdi->status == SR_ST_INACTIVE)
	150	return SR_OK;
	151
	152	sr_scpi_close(sdi->conn);
	153
	154	sdi->status = SR_ST_INACTIVE;
	155
	156	return SR_OK;
	157	}
	158
	159	static int check_channel_group(struct dev_context *devc,
	160	const struct sr_channel_group *cg)
	161	{
	162	unsigned int i;
	163	const struct scope_config *model;
	164
	165	model = devc->model_config;
	166
	167	if (!cg)
	168	return CG_NONE;
	169
	170	for (i = 0; i < model->analog_channels; i++)
	171	if (cg == devc->analog_groups[i])
	172	return CG_ANALOG;
	173
	174	for (i = 0; i < model->digital_pods; i++)
	175	if (cg == devc->digital_groups[i])
	176	return CG_DIGITAL;
	177
	178	sr_err("Invalid channel group specified.");
	179
	180	return CG_INVALID;
	181	}
	182
	183	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	184	const struct sr_channel_group *cg)
	185	{
	186	int ret, cg_type;
	187	unsigned int i;
	188	struct dev_context *devc;
	189	const struct scope_config *model;
	190	struct scope_state *state;
	191
	192	if (!sdi)
	193	return SR_ERR_ARG;
	194
	195	devc = sdi->priv;
	196
	197	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
	198	return SR_ERR;
	199
	200	ret = SR_ERR_NA;
	201	model = devc->model_config;
	202	state = devc->model_state;
	203
	204	switch (key) {
	205	case SR_CONF_NUM_HDIV:
	206	*data = g_variant_new_int32(model->num_xdivs);
	207	ret = SR_OK;
	208	break;
	209	case SR_CONF_TIMEBASE:
	210	data = g_variant_new("(tt)", (model->timebases)[state->timebase][0],
	211	(*model->timebases)[state->timebase][1]);
	212	ret = SR_OK;
	213	break;
	214	case SR_CONF_NUM_VDIV:
	215	if (cg_type == CG_NONE) {
	216	sr_err("No channel group specified.");
	217	return SR_ERR_CHANNEL_GROUP;
	218	} else if (cg_type == CG_ANALOG) {
	219	for (i = 0; i < model->analog_channels; i++) {
	220	if (cg != devc->analog_groups[i])
	221	continue;
	222	*data = g_variant_new_int32(model->num_ydivs);
	223	ret = SR_OK;
	224	break;
	225	}
	226
	227	} else {
	228	ret = SR_ERR_NA;
	229	}
	230	break;
	231	case SR_CONF_VDIV:
	232	if (cg_type == CG_NONE) {
	233	sr_err("No channel group specified.");
	234	return SR_ERR_CHANNEL_GROUP;
	235	} else if (cg_type == CG_ANALOG) {
	236	for (i = 0; i < model->analog_channels; i++) {
	237	if (cg != devc->analog_groups[i])
	238	continue;
	239	*data = g_variant_new("(tt)",
	240	(*model->vdivs)[state->analog_channels[i].vdiv][0],
	241	(*model->vdivs)[state->analog_channels[i].vdiv][1]);
	242	ret = SR_OK;
	243	break;
	244	}
	245
	246	} else {
	247	ret = SR_ERR_NA;
	248	}
	249	break;
	250	case SR_CONF_TRIGGER_SOURCE:
	251	data = g_variant_new_string((model->trigger_sources)[state->trigger_source]);
	252	ret = SR_OK;
	253	break;
	254	case SR_CONF_TRIGGER_SLOPE:
	255	data = g_variant_new_string((model->trigger_slopes)[state->trigger_slope]);
	256	ret = SR_OK;
	257	break;
	258	case SR_CONF_HORIZ_TRIGGERPOS:
	259	*data = g_variant_new_double(state->horiz_triggerpos);
	260	ret = SR_OK;
	261	break;
	262	case SR_CONF_COUPLING:
	263	if (cg_type == CG_NONE) {
	264	sr_err("No channel group specified.");
	265	return SR_ERR_CHANNEL_GROUP;
	266	} else if (cg_type == CG_ANALOG) {
	267	for (i = 0; i < model->analog_channels; i++) {
	268	if (cg != devc->analog_groups[i])
	269	continue;
	270	data = g_variant_new_string((model->coupling_options)[state->analog_channels[i].coupling]);
	271	ret = SR_OK;
	272	break;
	273	}
	274
	275	} else {
	276	ret = SR_ERR_NA;
	277	}
	278	break;
	279	case SR_CONF_SAMPLERATE:
	280	*data = g_variant_new_uint64(state->sample_rate);
	281	ret = SR_OK;
	282	break;
	283	default:
	284	ret = SR_ERR_NA;
	285	}
	286
	287	return ret;
	288	}
	289
	290	static GVariant build_tuples(const uint64_t (array)[][2], unsigned int n)
	291	{
	292	unsigned int i;
	293	GVariant *rational[2];
	294	GVariantBuilder gvb;
	295
	296	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
	297
	298	for (i = 0; i < n; i++) {
	299	rational[0] = g_variant_new_uint64((*array)[i][0]);
	300	rational[1] = g_variant_new_uint64((*array)[i][1]);
	301
	302	/* FIXME: Valgrind reports a memory leak here. */
	303	g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
	304	}
	305
	306	return g_variant_builder_end(&gvb);
	307	}
	308
	309	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
	310	const struct sr_channel_group *cg)
	311	{
	312	int ret, cg_type;
	313	unsigned int i, j;
	314	char command[MAX_COMMAND_SIZE], float_str[30];
	315	struct dev_context *devc;
	316	const struct scope_config *model;
	317	struct scope_state *state;
	318	const char *tmp;
	319	uint64_t p, q;
	320	double tmp_d;
	321	gboolean update_sample_rate;
	322
	323	if (!sdi)
	324	return SR_ERR_ARG;
	325
	326	devc = sdi->priv;
	327
	328	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
	329	return SR_ERR;
	330
	331	model = devc->model_config;
	332	state = devc->model_state;
	333	update_sample_rate = FALSE;
	334
	335	ret = SR_ERR_NA;
	336
	337	switch (key) {
	338	case SR_CONF_LIMIT_FRAMES:
	339	devc->frame_limit = g_variant_get_uint64(data);
	340	ret = SR_OK;
	341	break;
	342	case SR_CONF_TRIGGER_SOURCE:
	343	tmp = g_variant_get_string(data, NULL);
	344	for (i = 0; (*model->trigger_sources)[i]; i++) {
	345	if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
	346	continue;
	347	state->trigger_source = i;
	348	g_snprintf(command, sizeof(command),
	349	(*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
	350	(*model->trigger_sources)[i]);
	351
	352	ret = sr_scpi_send(sdi->conn, command);
	353	break;
	354	}
	355	break;
	356	case SR_CONF_VDIV:
	357	if (cg_type == CG_NONE) {
	358	sr_err("No channel group specified.");
	359	return SR_ERR_CHANNEL_GROUP;
	360	}
	361
	362	g_variant_get(data, "(tt)", &p, &q);
	363
	364	for (i = 0; i < model->num_vdivs; i++) {
	365	if (p != (*model->vdivs)[i][0] \|\|
	366	q != (*model->vdivs)[i][1])
	367	continue;
	368	for (j = 1; j <= model->analog_channels; j++) {
	369	if (cg != devc->analog_groups[j - 1])
	370	continue;
	371	state->analog_channels[j - 1].vdiv = i;
	372	g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
	373	g_snprintf(command, sizeof(command),
	374	(*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
	375	j, float_str);
	376
	377	if (sr_scpi_send(sdi->conn, command) != SR_OK \|\|
	378	sr_scpi_get_opc(sdi->conn) != SR_OK)
	379	return SR_ERR;
	380
	381	break;
	382	}
	383
	384	ret = SR_OK;
	385	break;
	386	}
	387	break;
	388	case SR_CONF_TIMEBASE:
	389	g_variant_get(data, "(tt)", &p, &q);
	390
	391	for (i = 0; i < model->num_timebases; i++) {
	392	if (p != (*model->timebases)[i][0] \|\|
	393	q != (*model->timebases)[i][1])
	394	continue;
	395	state->timebase = i;
	396	g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
	397	g_snprintf(command, sizeof(command),
	398	(*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
	399	float_str);
	400
	401	ret = sr_scpi_send(sdi->conn, command);
	402	update_sample_rate = TRUE;
	403	break;
	404	}
	405	break;
	406	case SR_CONF_HORIZ_TRIGGERPOS:
	407	tmp_d = g_variant_get_double(data);
	408
	409	if (tmp_d < 0.0 \|\| tmp_d > 1.0)
	410	return SR_ERR;
	411
	412	state->horiz_triggerpos = tmp_d;
	413	tmp_d = -(tmp_d - 0.5) *
	414	((double) (*model->timebases)[state->timebase][0] /
	415	(*model->timebases)[state->timebase][1])
	416	* model->num_xdivs;
	417
	418	g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
	419	g_snprintf(command, sizeof(command),
	420	(*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
	421	float_str);
	422
	423	ret = sr_scpi_send(sdi->conn, command);
	424	break;
	425	case SR_CONF_TRIGGER_SLOPE:
	426	tmp = g_variant_get_string(data, NULL);
	427	for (i = 0; (*model->trigger_slopes)[i]; i++) {
	428	if (g_strcmp0(tmp, (*model->trigger_slopes)[i]) != 0)
	429	continue;
	430	state->trigger_slope = i;
	431	g_snprintf(command, sizeof(command),
	432	(*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
	433	(*model->trigger_slopes)[i]);
	434
	435	ret = sr_scpi_send(sdi->conn, command);
	436	break;
	437	}
	438	break;
	439	case SR_CONF_COUPLING:
	440	if (cg_type == CG_NONE) {
	441	sr_err("No channel group specified.");
	442	return SR_ERR_CHANNEL_GROUP;
	443	}
	444
	445	tmp = g_variant_get_string(data, NULL);
	446
	447	for (i = 0; (*model->coupling_options)[i]; i++) {
	448	if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
	449	continue;
	450	for (j = 1; j <= model->analog_channels; j++) {
	451	if (cg != devc->analog_groups[j - 1])
	452	continue;
	453	state->analog_channels[j-1].coupling = i;
	454
	455	g_snprintf(command, sizeof(command),
	456	(*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
	457	j, tmp);
	458
	459	if (sr_scpi_send(sdi->conn, command) != SR_OK \|\|
	460	sr_scpi_get_opc(sdi->conn) != SR_OK)
	461	return SR_ERR;
	462	break;
	463	}
	464
	465	ret = SR_OK;
	466	break;
	467	}
	468	break;
	469	default:
	470	ret = SR_ERR_NA;
	471	break;
	472	}
	473
	474	if (ret == SR_OK)
	475	ret = sr_scpi_get_opc(sdi->conn);
	476
	477	if (ret == SR_OK && update_sample_rate)
	478	ret = hmo_update_sample_rate(sdi);
	479
	480	return ret;
	481	}
	482
	483	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	484	const struct sr_channel_group *cg)
	485	{
	486	int cg_type = CG_NONE;
	487	struct dev_context *devc = NULL;
	488	const struct scope_config *model = NULL;
	489
	490	if (sdi && (devc = sdi->priv)) {
	491	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
	492	return SR_ERR;
	493
	494	model = devc->model_config;
	495	}
	496
	497	switch (key) {
	498	case SR_CONF_SCAN_OPTIONS:
	499	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	500	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
	501	break;
	502	case SR_CONF_DEVICE_OPTIONS:
	503	if (cg_type == CG_NONE) {
	504	if (model)
	505	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	506	model->devopts, model->num_devopts, sizeof(uint32_t));
	507	else
	508	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	509	drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
	510	} else if (cg_type == CG_ANALOG) {
	511	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	512	model->analog_devopts, model->num_analog_devopts,
	513	sizeof(uint32_t));
	514	} else {
	515	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	516	NULL, 0, sizeof(uint32_t));
	517	}
	518	break;
	519	case SR_CONF_COUPLING:
	520	if (cg_type == CG_NONE)
	521	return SR_ERR_CHANNEL_GROUP;
	522	data = g_variant_new_strv(model->coupling_options,
	523	g_strv_length((char *)model->coupling_options));
	524	break;
	525	case SR_CONF_TRIGGER_SOURCE:
	526	if (!model)
	527	return SR_ERR_ARG;
	528	data = g_variant_new_strv(model->trigger_sources,
	529	g_strv_length((char *)model->trigger_sources));
	530	break;
	531	case SR_CONF_TRIGGER_SLOPE:
	532	if (!model)
	533	return SR_ERR_ARG;
	534	data = g_variant_new_strv(model->trigger_slopes,
	535	g_strv_length((char *)model->trigger_slopes));
	536	break;
	537	case SR_CONF_TIMEBASE:
	538	if (!model)
	539	return SR_ERR_ARG;
	540	*data = build_tuples(model->timebases, model->num_timebases);
	541	break;
	542	case SR_CONF_VDIV:
	543	if (cg_type == CG_NONE)
	544	return SR_ERR_CHANNEL_GROUP;
	545	*data = build_tuples(model->vdivs, model->num_vdivs);
	546	break;
	547	default:
	548	return SR_ERR_NA;
	549	}
	550
	551	return SR_OK;
	552	}
	553
	554	SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
	555	{
	556	char command[MAX_COMMAND_SIZE];
	557	struct sr_channel *ch;
	558	struct dev_context *devc;
	559	const struct scope_config *model;
	560
	561	devc = sdi->priv;
	562	model = devc->model_config;
	563
	564	ch = devc->current_channel->data;
	565
	566	switch (ch->type) {
	567	case SR_CHANNEL_ANALOG:
	568	g_snprintf(command, sizeof(command),
	569	(*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
	570	ch->index + 1);
	571	break;
	572	case SR_CHANNEL_LOGIC:
	573	g_snprintf(command, sizeof(command),
	574	(*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
	575	ch->index < 8 ? 1 : 2);
	576	break;
	577	default:
	578	sr_err("Invalid channel type.");
	579	break;
	580	}
	581
	582	return sr_scpi_send(sdi->conn, command);
	583	}
	584
	585	static int hmo_check_channels(GSList *channels)
	586	{
	587	GSList *l;
	588	struct sr_channel *ch;
	589	gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
	590
	591	enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
	592
	593	for (l = channels; l; l = l->next) {
	594	ch = l->data;
	595	switch (ch->type) {
	596	case SR_CHANNEL_ANALOG:
	597	if (ch->index == 2)
	598	enabled_chan3 = TRUE;
	599	else if (ch->index == 3)
	600	enabled_chan4 = TRUE;
	601	break;
	602	case SR_CHANNEL_LOGIC:
	603	if (ch->index < 8)
	604	enabled_pod1 = TRUE;
	605	else
	606	enabled_pod2 = TRUE;
	607	break;
	608	default:
	609	return SR_ERR;
	610	}
	611	}
	612
	613	if ((enabled_pod1 && enabled_chan3) \|\|
	614	(enabled_pod2 && enabled_chan4))
	615	return SR_ERR;
	616
	617	return SR_OK;
	618	}
	619
	620	static int hmo_setup_channels(const struct sr_dev_inst *sdi)
	621	{
	622	GSList *l;
	623	unsigned int i;
	624	gboolean *pod_enabled, setup_changed;
	625	char command[MAX_COMMAND_SIZE];
	626	struct scope_state *state;
	627	const struct scope_config *model;
	628	struct sr_channel *ch;
	629	struct dev_context *devc;
	630	struct sr_scpi_dev_inst *scpi;
	631
	632	devc = sdi->priv;
	633	scpi = sdi->conn;
	634	state = devc->model_state;
	635	model = devc->model_config;
	636	setup_changed = FALSE;
	637
	638	pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
	639
	640	for (l = sdi->channels; l; l = l->next) {
	641	ch = l->data;
	642	switch (ch->type) {
	643	case SR_CHANNEL_ANALOG:
	644	if (ch->enabled == state->analog_channels[ch->index].state)
	645	break;
	646	g_snprintf(command, sizeof(command),
	647	(*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
	648	ch->index + 1, ch->enabled);
	649
	650	if (sr_scpi_send(scpi, command) != SR_OK)
	651	return SR_ERR;
	652	state->analog_channels[ch->index].state = ch->enabled;
	653	setup_changed = TRUE;
	654	break;
	655	case SR_CHANNEL_LOGIC:
	656	/*
	657	* A digital POD needs to be enabled for every group of
	658	* 8 channels.
	659	*/
	660	if (ch->enabled)
	661	pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;
	662
	663	if (ch->enabled == state->digital_channels[ch->index])
	664	break;
	665	g_snprintf(command, sizeof(command),
	666	(*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
	667	ch->index, ch->enabled);
	668
	669	if (sr_scpi_send(scpi, command) != SR_OK)
	670	return SR_ERR;
	671
	672	state->digital_channels[ch->index] = ch->enabled;
	673	setup_changed = TRUE;
	674	break;
	675	default:
	676	return SR_ERR;
	677	}
	678	}
	679
	680	for (i = 1; i <= model->digital_pods; i++) {
	681	if (state->digital_pods[i - 1] == pod_enabled[i - 1])
	682	continue;
	683	g_snprintf(command, sizeof(command),
	684	(*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
	685	i, pod_enabled[i - 1]);
	686	if (sr_scpi_send(scpi, command) != SR_OK)
	687	return SR_ERR;
	688	state->digital_pods[i - 1] = pod_enabled[i - 1];
	689	setup_changed = TRUE;
	690	}
	691
	692	g_free(pod_enabled);
	693
	694	if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
	695	return SR_ERR;
	696
	697	return SR_OK;
	698	}
	699
	700	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
	701	{
	702	GSList *l;
	703	gboolean digital_added;
	704	struct sr_channel *ch;
	705	struct dev_context *devc;
	706	struct sr_scpi_dev_inst *scpi;
	707
	708	if (sdi->status != SR_ST_ACTIVE)
	709	return SR_ERR_DEV_CLOSED;
	710
	711	scpi = sdi->conn;
	712	devc = sdi->priv;
	713	digital_added = FALSE;
	714
	715	g_slist_free(devc->enabled_channels);
	716	devc->enabled_channels = NULL;
	717
	718	for (l = sdi->channels; l; l = l->next) {
	719	ch = l->data;
	720	if (!ch->enabled)
	721	continue;
	722	/* Only add a single digital channel. */
	723	if (ch->type != SR_CHANNEL_LOGIC \|\| !digital_added) {
	724	devc->enabled_channels = g_slist_append(
	725	devc->enabled_channels, ch);
	726	if (ch->type == SR_CHANNEL_LOGIC)
	727	digital_added = TRUE;
	728	}
	729	}
	730
	731	if (!devc->enabled_channels)
	732	return SR_ERR;
	733
	734	if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
	735	sr_err("Invalid channel configuration specified!");
	736	return SR_ERR_NA;
	737	}
	738
	739	if (hmo_setup_channels(sdi) != SR_OK) {
	740	sr_err("Failed to setup channel configuration!");
	741	return SR_ERR;
	742	}
	743
	744	sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
	745	hmo_receive_data, (void *)sdi);
	746
	747	std_session_send_df_header(sdi, LOG_PREFIX);
	748
	749	devc->current_channel = devc->enabled_channels;
	750
	751	return hmo_request_data(sdi);
	752	}
	753
	754	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
	755	{
	756	struct dev_context *devc;
	757	struct sr_scpi_dev_inst *scpi;
	758
	759	std_session_send_df_end(sdi, LOG_PREFIX);
	760
	761	if (sdi->status != SR_ST_ACTIVE)
	762	return SR_ERR_DEV_CLOSED;
	763
	764	devc = sdi->priv;
	765
	766	devc->num_frames = 0;
	767	g_slist_free(devc->enabled_channels);
	768	devc->enabled_channels = NULL;
	769	scpi = sdi->conn;
	770	sr_scpi_source_remove(sdi->session, scpi);
	771
	772	return SR_OK;
	773	}
	774
	775	SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
	776	.name = "hameg-hmo",
	777	.longname = "Hameg HMO",
	778	.api_version = 1,
	779	.init = std_init,
	780	.cleanup = std_cleanup,
	781	.scan = scan,
	782	.dev_list = std_dev_list,
	783	.dev_clear = dev_clear,
	784	.config_get = config_get,
	785	.config_set = config_set,
	786	.config_list = config_list,
	787	.dev_open = dev_open,
	788	.dev_close = dev_close,
	789	.dev_acquisition_start = dev_acquisition_start,
	790	.dev_acquisition_stop = dev_acquisition_stop,
	791	.context = NULL,
	792	};