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

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

	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 \|\| !(devc = sdi->priv))
	193	return SR_ERR_ARG;
	194
	195	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
	196	return SR_ERR;
	197
	198	ret = SR_ERR_NA;
	199	model = devc->model_config;
	200	state = devc->model_state;
	201
	202	switch (key) {
	203	case SR_CONF_NUM_HDIV:
	204	*data = g_variant_new_int32(model->num_xdivs);
	205	ret = SR_OK;
	206	break;
	207	case SR_CONF_TIMEBASE:
	208	data = g_variant_new("(tt)", (model->timebases)[state->timebase][0],
	209	(*model->timebases)[state->timebase][1]);
	210	ret = SR_OK;
	211	break;
	212	case SR_CONF_NUM_VDIV:
	213	if (cg_type == CG_NONE) {
	214	sr_err("No channel group specified.");
	215	return SR_ERR_CHANNEL_GROUP;
	216	} else if (cg_type == CG_ANALOG) {
	217	for (i = 0; i < model->analog_channels; i++) {
	218	if (cg != devc->analog_groups[i])
	219	continue;
	220	*data = g_variant_new_int32(model->num_ydivs);
	221	ret = SR_OK;
	222	break;
	223	}
	224
	225	} else {
	226	ret = SR_ERR_NA;
	227	}
	228	break;
	229	case SR_CONF_VDIV:
	230	if (cg_type == CG_NONE) {
	231	sr_err("No channel group specified.");
	232	return SR_ERR_CHANNEL_GROUP;
	233	} else if (cg_type == CG_ANALOG) {
	234	for (i = 0; i < model->analog_channels; i++) {
	235	if (cg != devc->analog_groups[i])
	236	continue;
	237	*data = g_variant_new("(tt)",
	238	(*model->vdivs)[state->analog_channels[i].vdiv][0],
	239	(*model->vdivs)[state->analog_channels[i].vdiv][1]);
	240	ret = SR_OK;
	241	break;
	242	}
	243
	244	} else {
	245	ret = SR_ERR_NA;
	246	}
	247	break;
	248	case SR_CONF_TRIGGER_SOURCE:
	249	data = g_variant_new_string((model->trigger_sources)[state->trigger_source]);
	250	ret = SR_OK;
	251	break;
	252	case SR_CONF_TRIGGER_SLOPE:
	253	data = g_variant_new_string((model->trigger_slopes)[state->trigger_slope]);
	254	ret = SR_OK;
	255	break;
	256	case SR_CONF_HORIZ_TRIGGERPOS:
	257	*data = g_variant_new_double(state->horiz_triggerpos);
	258	ret = SR_OK;
	259	break;
	260	case SR_CONF_COUPLING:
	261	if (cg_type == CG_NONE) {
	262	sr_err("No channel group specified.");
	263	return SR_ERR_CHANNEL_GROUP;
	264	} else if (cg_type == CG_ANALOG) {
	265	for (i = 0; i < model->analog_channels; i++) {
	266	if (cg != devc->analog_groups[i])
	267	continue;
	268	data = g_variant_new_string((model->coupling_options)[state->analog_channels[i].coupling]);
	269	ret = SR_OK;
	270	break;
	271	}
	272
	273	} else {
	274	ret = SR_ERR_NA;
	275	}
	276	break;
	277	case SR_CONF_SAMPLERATE:
	278	*data = g_variant_new_uint64(state->sample_rate);
	279	ret = SR_OK;
	280	break;
	281	default:
	282	ret = SR_ERR_NA;
	283	}
	284
	285	return ret;
	286	}
	287
	288	static GVariant build_tuples(const uint64_t (array)[][2], unsigned int n)
	289	{
	290	unsigned int i;
	291	GVariant *rational[2];
	292	GVariantBuilder gvb;
	293
	294	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
	295
	296	for (i = 0; i < n; i++) {
	297	rational[0] = g_variant_new_uint64((*array)[i][0]);
	298	rational[1] = g_variant_new_uint64((*array)[i][1]);
	299
	300	/* FIXME: Valgrind reports a memory leak here. */
	301	g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
	302	}
	303
	304	return g_variant_builder_end(&gvb);
	305	}
	306
	307	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
	308	const struct sr_channel_group *cg)
	309	{
	310	int ret, cg_type;
	311	unsigned int i, j;
	312	char command[MAX_COMMAND_SIZE], float_str[30];
	313	struct dev_context *devc;
	314	const struct scope_config *model;
	315	struct scope_state *state;
	316	const char *tmp;
	317	uint64_t p, q;
	318	double tmp_d;
	319	gboolean update_sample_rate;
	320
	321	if (!sdi \|\| !(devc = sdi->priv))
	322	return SR_ERR_ARG;
	323
	324	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
	325	return SR_ERR;
	326
	327	model = devc->model_config;
	328	state = devc->model_state;
	329	update_sample_rate = FALSE;
	330
	331	ret = SR_ERR_NA;
	332
	333	switch (key) {
	334	case SR_CONF_LIMIT_FRAMES:
	335	devc->frame_limit = g_variant_get_uint64(data);
	336	ret = SR_OK;
	337	break;
	338	case SR_CONF_TRIGGER_SOURCE:
	339	tmp = g_variant_get_string(data, NULL);
	340	for (i = 0; (*model->trigger_sources)[i]; i++) {
	341	if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
	342	continue;
	343	state->trigger_source = i;
	344	g_snprintf(command, sizeof(command),
	345	(*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
	346	(*model->trigger_sources)[i]);
	347
	348	ret = sr_scpi_send(sdi->conn, command);
	349	break;
	350	}
	351	break;
	352	case SR_CONF_VDIV:
	353	if (cg_type == CG_NONE) {
	354	sr_err("No channel group specified.");
	355	return SR_ERR_CHANNEL_GROUP;
	356	}
	357
	358	g_variant_get(data, "(tt)", &p, &q);
	359
	360	for (i = 0; i < model->num_vdivs; i++) {
	361	if (p != (*model->vdivs)[i][0] \|\|
	362	q != (*model->vdivs)[i][1])
	363	continue;
	364	for (j = 1; j <= model->analog_channels; j++) {
	365	if (cg != devc->analog_groups[j - 1])
	366	continue;
	367	state->analog_channels[j - 1].vdiv = i;
	368	g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
	369	g_snprintf(command, sizeof(command),
	370	(*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
	371	j, float_str);
	372
	373	if (sr_scpi_send(sdi->conn, command) != SR_OK \|\|
	374	sr_scpi_get_opc(sdi->conn) != SR_OK)
	375	return SR_ERR;
	376
	377	break;
	378	}
	379
	380	ret = SR_OK;
	381	break;
	382	}
	383	break;
	384	case SR_CONF_TIMEBASE:
	385	g_variant_get(data, "(tt)", &p, &q);
	386
	387	for (i = 0; i < model->num_timebases; i++) {
	388	if (p != (*model->timebases)[i][0] \|\|
	389	q != (*model->timebases)[i][1])
	390	continue;
	391	state->timebase = i;
	392	g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
	393	g_snprintf(command, sizeof(command),
	394	(*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
	395	float_str);
	396
	397	ret = sr_scpi_send(sdi->conn, command);
	398	update_sample_rate = TRUE;
	399	break;
	400	}
	401	break;
	402	case SR_CONF_HORIZ_TRIGGERPOS:
	403	tmp_d = g_variant_get_double(data);
	404
	405	if (tmp_d < 0.0 \|\| tmp_d > 1.0)
	406	return SR_ERR;
	407
	408	state->horiz_triggerpos = tmp_d;
	409	tmp_d = -(tmp_d - 0.5) *
	410	((double) (*model->timebases)[state->timebase][0] /
	411	(*model->timebases)[state->timebase][1])
	412	* model->num_xdivs;
	413
	414	g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
	415	g_snprintf(command, sizeof(command),
	416	(*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
	417	float_str);
	418
	419	ret = sr_scpi_send(sdi->conn, command);
	420	break;
	421	case SR_CONF_TRIGGER_SLOPE:
	422	tmp = g_variant_get_string(data, NULL);
	423	for (i = 0; (*model->trigger_slopes)[i]; i++) {
	424	if (g_strcmp0(tmp, (*model->trigger_slopes)[i]) != 0)
	425	continue;
	426	state->trigger_slope = i;
	427	g_snprintf(command, sizeof(command),
	428	(*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
	429	(*model->trigger_slopes)[i]);
	430
	431	ret = sr_scpi_send(sdi->conn, command);
	432	break;
	433	}
	434	break;
	435	case SR_CONF_COUPLING:
	436	if (cg_type == CG_NONE) {
	437	sr_err("No channel group specified.");
	438	return SR_ERR_CHANNEL_GROUP;
	439	}
	440
	441	tmp = g_variant_get_string(data, NULL);
	442
	443	for (i = 0; (*model->coupling_options)[i]; i++) {
	444	if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
	445	continue;
	446	for (j = 1; j <= model->analog_channels; j++) {
	447	if (cg != devc->analog_groups[j - 1])
	448	continue;
	449	state->analog_channels[j-1].coupling = i;
	450
	451	g_snprintf(command, sizeof(command),
	452	(*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
	453	j, tmp);
	454
	455	if (sr_scpi_send(sdi->conn, command) != SR_OK \|\|
	456	sr_scpi_get_opc(sdi->conn) != SR_OK)
	457	return SR_ERR;
	458	break;
	459	}
	460
	461	ret = SR_OK;
	462	break;
	463	}
	464	break;
	465	default:
	466	ret = SR_ERR_NA;
	467	break;
	468	}
	469
	470	if (ret == SR_OK)
	471	ret = sr_scpi_get_opc(sdi->conn);
	472
	473	if (ret == SR_OK && update_sample_rate)
	474	ret = hmo_update_sample_rate(sdi);
	475
	476	return ret;
	477	}
	478
	479	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	480	const struct sr_channel_group *cg)
	481	{
	482	int cg_type = CG_NONE;
	483	struct dev_context *devc = NULL;
	484	const struct scope_config *model = NULL;
	485
	486	if (sdi && (devc = sdi->priv)) {
	487	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
	488	return SR_ERR;
	489
	490	model = devc->model_config;
	491	}
	492
	493	switch (key) {
	494	case SR_CONF_SCAN_OPTIONS:
	495	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	496	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
	497	break;
	498	case SR_CONF_DEVICE_OPTIONS:
	499	if (cg_type == CG_NONE) {
	500	if (model)
	501	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	502	model->devopts, model->num_devopts, sizeof(uint32_t));
	503	else
	504	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	505	drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
	506	} else if (cg_type == CG_ANALOG) {
	507	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	508	model->analog_devopts, model->num_analog_devopts,
	509	sizeof(uint32_t));
	510	} else {
	511	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	512	NULL, 0, sizeof(uint32_t));
	513	}
	514	break;
	515	case SR_CONF_COUPLING:
	516	if (cg_type == CG_NONE)
	517	return SR_ERR_CHANNEL_GROUP;
	518	data = g_variant_new_strv(model->coupling_options,
	519	g_strv_length((char *)model->coupling_options));
	520	break;
	521	case SR_CONF_TRIGGER_SOURCE:
	522	if (!model)
	523	return SR_ERR_ARG;
	524	data = g_variant_new_strv(model->trigger_sources,
	525	g_strv_length((char *)model->trigger_sources));
	526	break;
	527	case SR_CONF_TRIGGER_SLOPE:
	528	if (!model)
	529	return SR_ERR_ARG;
	530	data = g_variant_new_strv(model->trigger_slopes,
	531	g_strv_length((char *)model->trigger_slopes));
	532	break;
	533	case SR_CONF_TIMEBASE:
	534	if (!model)
	535	return SR_ERR_ARG;
	536	*data = build_tuples(model->timebases, model->num_timebases);
	537	break;
	538	case SR_CONF_VDIV:
	539	if (cg_type == CG_NONE)
	540	return SR_ERR_CHANNEL_GROUP;
	541	*data = build_tuples(model->vdivs, model->num_vdivs);
	542	break;
	543	default:
	544	return SR_ERR_NA;
	545	}
	546
	547	return SR_OK;
	548	}
	549
	550	SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
	551	{
	552	char command[MAX_COMMAND_SIZE];
	553	struct sr_channel *ch;
	554	struct dev_context *devc;
	555	const struct scope_config *model;
	556
	557	devc = sdi->priv;
	558	model = devc->model_config;
	559
	560	ch = devc->current_channel->data;
	561
	562	switch (ch->type) {
	563	case SR_CHANNEL_ANALOG:
	564	g_snprintf(command, sizeof(command),
	565	(*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
	566	ch->index + 1);
	567	break;
	568	case SR_CHANNEL_LOGIC:
	569	g_snprintf(command, sizeof(command),
	570	(*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
	571	ch->index < 8 ? 1 : 2);
	572	break;
	573	default:
	574	sr_err("Invalid channel type.");
	575	break;
	576	}
	577
	578	return sr_scpi_send(sdi->conn, command);
	579	}
	580
	581	static int hmo_check_channels(GSList *channels)
	582	{
	583	GSList *l;
	584	struct sr_channel *ch;
	585	gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
	586
	587	enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
	588
	589	for (l = channels; l; l = l->next) {
	590	ch = l->data;
	591	switch (ch->type) {
	592	case SR_CHANNEL_ANALOG:
	593	if (ch->index == 2)
	594	enabled_chan3 = TRUE;
	595	else if (ch->index == 3)
	596	enabled_chan4 = TRUE;
	597	break;
	598	case SR_CHANNEL_LOGIC:
	599	if (ch->index < 8)
	600	enabled_pod1 = TRUE;
	601	else
	602	enabled_pod2 = TRUE;
	603	break;
	604	default:
	605	return SR_ERR;
	606	}
	607	}
	608
	609	if ((enabled_pod1 && enabled_chan3) \|\|
	610	(enabled_pod2 && enabled_chan4))
	611	return SR_ERR;
	612
	613	return SR_OK;
	614	}
	615
	616	static int hmo_setup_channels(const struct sr_dev_inst *sdi)
	617	{
	618	GSList *l;
	619	unsigned int i;
	620	gboolean *pod_enabled, setup_changed;
	621	char command[MAX_COMMAND_SIZE];
	622	struct scope_state *state;
	623	const struct scope_config *model;
	624	struct sr_channel *ch;
	625	struct dev_context *devc;
	626	struct sr_scpi_dev_inst *scpi;
	627
	628	devc = sdi->priv;
	629	scpi = sdi->conn;
	630	state = devc->model_state;
	631	model = devc->model_config;
	632	setup_changed = FALSE;
	633
	634	pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
	635
	636	for (l = sdi->channels; l; l = l->next) {
	637	ch = l->data;
	638	switch (ch->type) {
	639	case SR_CHANNEL_ANALOG:
	640	if (ch->enabled == state->analog_channels[ch->index].state)
	641	break;
	642	g_snprintf(command, sizeof(command),
	643	(*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
	644	ch->index + 1, ch->enabled);
	645
	646	if (sr_scpi_send(scpi, command) != SR_OK)
	647	return SR_ERR;
	648	state->analog_channels[ch->index].state = ch->enabled;
	649	setup_changed = TRUE;
	650	break;
	651	case SR_CHANNEL_LOGIC:
	652	/*
	653	* A digital POD needs to be enabled for every group of
	654	* 8 channels.
	655	*/
	656	if (ch->enabled)
	657	pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;
	658
	659	if (ch->enabled == state->digital_channels[ch->index])
	660	break;
	661	g_snprintf(command, sizeof(command),
	662	(*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
	663	ch->index, ch->enabled);
	664
	665	if (sr_scpi_send(scpi, command) != SR_OK)
	666	return SR_ERR;
	667
	668	state->digital_channels[ch->index] = ch->enabled;
	669	setup_changed = TRUE;
	670	break;
	671	default:
	672	return SR_ERR;
	673	}
	674	}
	675
	676	for (i = 1; i <= model->digital_pods; i++) {
	677	if (state->digital_pods[i - 1] == pod_enabled[i - 1])
	678	continue;
	679	g_snprintf(command, sizeof(command),
	680	(*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
	681	i, pod_enabled[i - 1]);
	682	if (sr_scpi_send(scpi, command) != SR_OK)
	683	return SR_ERR;
	684	state->digital_pods[i - 1] = pod_enabled[i - 1];
	685	setup_changed = TRUE;
	686	}
	687
	688	g_free(pod_enabled);
	689
	690	if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
	691	return SR_ERR;
	692
	693	return SR_OK;
	694	}
	695
	696	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
	697	{
	698	GSList *l;
	699	gboolean digital_added;
	700	struct sr_channel *ch;
	701	struct dev_context *devc;
	702	struct sr_scpi_dev_inst *scpi;
	703
	704	if (sdi->status != SR_ST_ACTIVE)
	705	return SR_ERR_DEV_CLOSED;
	706
	707	scpi = sdi->conn;
	708	devc = sdi->priv;
	709	digital_added = FALSE;
	710
	711	g_slist_free(devc->enabled_channels);
	712	devc->enabled_channels = NULL;
	713
	714	for (l = sdi->channels; l; l = l->next) {
	715	ch = l->data;
	716	if (!ch->enabled)
	717	continue;
	718	/* Only add a single digital channel. */
	719	if (ch->type != SR_CHANNEL_LOGIC \|\| !digital_added) {
	720	devc->enabled_channels = g_slist_append(
	721	devc->enabled_channels, ch);
	722	if (ch->type == SR_CHANNEL_LOGIC)
	723	digital_added = TRUE;
	724	}
	725	}
	726
	727	if (!devc->enabled_channels)
	728	return SR_ERR;
	729
	730	if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
	731	sr_err("Invalid channel configuration specified!");
	732	return SR_ERR_NA;
	733	}
	734
	735	if (hmo_setup_channels(sdi) != SR_OK) {
	736	sr_err("Failed to setup channel configuration!");
	737	return SR_ERR;
	738	}
	739
	740	sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
	741	hmo_receive_data, (void *)sdi);
	742
	743	std_session_send_df_header(sdi, LOG_PREFIX);
	744
	745	devc->current_channel = devc->enabled_channels;
	746
	747	return hmo_request_data(sdi);
	748	}
	749
	750	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
	751	{
	752	struct dev_context *devc;
	753	struct sr_scpi_dev_inst *scpi;
	754
	755	std_session_send_df_end(sdi, LOG_PREFIX);
	756
	757	if (sdi->status != SR_ST_ACTIVE)
	758	return SR_ERR_DEV_CLOSED;
	759
	760	devc = sdi->priv;
	761
	762	devc->num_frames = 0;
	763	g_slist_free(devc->enabled_channels);
	764	devc->enabled_channels = NULL;
	765	scpi = sdi->conn;
	766	sr_scpi_source_remove(sdi->session, scpi);
	767
	768	return SR_OK;
	769	}
	770
	771	SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
	772	.name = "hameg-hmo",
	773	.longname = "Hameg HMO",
	774	.api_version = 1,
	775	.init = std_init,
	776	.cleanup = std_cleanup,
	777	.scan = scan,
	778	.dev_list = std_dev_list,
	779	.dev_clear = dev_clear,
	780	.config_get = config_get,
	781	.config_set = config_set,
	782	.config_list = config_list,
	783	.dev_open = dev_open,
	784	.dev_close = dev_close,
	785	.dev_acquisition_start = dev_acquisition_start,
	786	.dev_acquisition_stop = dev_acquisition_stop,
	787	.context = NULL,
	788	};