[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 <stdlib.h>
#include "protocol.h"

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

SR_PRIV struct sr_dev_driver hameg_hmo_driver_info;
static struct sr_dev_driver *di = &hameg_hmo_driver_info;

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

static const int32_t hwopts[] = {
	SR_CONF_CONN,
	SR_CONF_SERIALCOMM,
};

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

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

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;

	if (!(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE,
				    hw_info->manufacturer, hw_info->model,
				    hw_info->firmware_version))) {
		goto fail;
	}
	sr_scpi_hw_info_free(hw_info);
	hw_info = NULL;

	if (!(devc = g_try_malloc0(sizeof(struct dev_context))))
		goto fail;

	sdi->driver = di;
	sdi->priv = devc;
	sdi->inst_type = SR_INST_SCPI;
	sdi->conn = scpi;

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

	sr_scpi_close(sdi->conn);

	sdi->status = SR_ST_INACTIVE;

	return sdi;

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

	return NULL;
}

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

static GSList *dev_list(void)
{
	return ((struct drv_context *)(di->priv))->instances;
}

static void clear_helper(void *priv)
{
	unsigned int i;
	struct dev_context *devc;
	struct scope_config *model;

	devc = priv;
	model = devc->model_config;

	hmo_scope_state_free(devc->model_state);

	for (i = 0; i < model->analog_channels; ++i)
		g_slist_free(devc->analog_groups[i].channels);

	for (i = 0; i < model->digital_pods; ++i) {
		g_slist_free(devc->digital_groups[i].channels);
		g_free(devc->digital_groups[i].name);
	}

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

	g_free(devc);
}

static int dev_clear(void)
{
	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 cleanup(void)
{
	dev_clear();

	return SR_OK;
}

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

		if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
			return SR_ERR_ARG;

		state->trigger_slope = (tmp[0] == 'r') ? 0 : 1;

		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
			   (state->trigger_slope == 0) ? "POS" : "NEG");

		ret = sr_scpi_send(sdi->conn, command);
		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(int key, GVariant **data, const struct sr_dev_inst *sdi,
		       const struct sr_channel_group *cg)
{
	int cg_type;
	struct dev_context *devc;
	struct scope_config *model;

	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;

	switch (key) {
	case SR_CONF_DEVICE_OPTIONS:
		if (cg_type == CG_NONE) {
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
				model->hw_caps, model->num_hwcaps,
				sizeof(int32_t));
		} else if (cg_type == CG_ANALOG) {
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
				model->analog_hwcaps, model->num_analog_hwcaps,
				sizeof(int32_t));
		} else {
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
				NULL, 0, sizeof(int32_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:
		*data = g_variant_new_strv(*model->trigger_sources,
			   g_strv_length((char **)*model->trigger_sources));
		break;
	case SR_CONF_TRIGGER_SLOPE:
		*data = g_variant_new_strv(*model->trigger_slopes,
			   g_strv_length((char **)*model->trigger_slopes));
		break;
	case SR_CONF_TIMEBASE:
		*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;
	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;
	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, void *cb_data)
{
	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;

	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);

	/* Send header packet to the session bus. */
	std_session_send_df_header(cb_data, LOG_PREFIX);

	devc->current_channel = devc->enabled_channels;

	return hmo_request_data(sdi);
}

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

	(void)cb_data;

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

	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 = init,
	.cleanup = cleanup,
	.scan = scan,
	.dev_list = dev_list,
	.dev_clear = dev_clear,
	.config_get = config_get,
	.config_set = config_set,
	.config_list = config_list,
	.dev_open = dev_open,
	.dev_close = dev_close,
	.dev_acquisition_start = dev_acquisition_start,
	.dev_acquisition_stop = dev_acquisition_stop,
	.priv = NULL,
};
Commit	Line	Data
	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 <stdlib.h>
	21	#include "protocol.h"
	22
	23	#define SERIALCOMM "115200/8n1/flow=1"
	24
	25	SR_PRIV struct sr_dev_driver hameg_hmo_driver_info;
	26	static struct sr_dev_driver *di = &hameg_hmo_driver_info;
	27
	28	static const char *manufacturers[] = {
	29	"HAMEG",
	30	};
	31
	32	static const int32_t hwopts[] = {
	33	SR_CONF_CONN,
	34	SR_CONF_SERIALCOMM,
	35	};
	36
	37	enum {
	38	CG_INVALID = -1,
	39	CG_NONE,
	40	CG_ANALOG,
	41	CG_DIGITAL,
	42	};
	43
	44	static int init(struct sr_context *sr_ctx)
	45	{
	46	return std_init(sr_ctx, di, LOG_PREFIX);
	47	}
	48
	49	static int check_manufacturer(const char *manufacturer)
	50	{
	51	unsigned int i;
	52
	53	for (i = 0; i < ARRAY_SIZE(manufacturers); ++i)
	54	if (!strcmp(manufacturer, manufacturers[i]))
	55	return SR_OK;
	56
	57	return SR_ERR;
	58	}
	59
	60	static struct sr_dev_inst hmo_probe_serial_device(struct sr_scpi_dev_inst scpi)
	61	{
	62	struct sr_dev_inst *sdi;
	63	struct dev_context *devc;
	64	struct sr_scpi_hw_info *hw_info;
	65
	66	sdi = NULL;
	67	devc = NULL;
	68	hw_info = NULL;
	69
	70	if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
	71	sr_info("Couldn't get IDN response.");
	72	goto fail;
	73	}
	74
	75	if (check_manufacturer(hw_info->manufacturer) != SR_OK)
	76	goto fail;
	77
	78	if (!(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE,
	79	hw_info->manufacturer, hw_info->model,
	80	hw_info->firmware_version))) {
	81	goto fail;
	82	}
	83	sr_scpi_hw_info_free(hw_info);
	84	hw_info = NULL;
	85
	86	if (!(devc = g_try_malloc0(sizeof(struct dev_context))))
	87	goto fail;
	88
	89	sdi->driver = di;
	90	sdi->priv = devc;
	91	sdi->inst_type = SR_INST_SCPI;
	92	sdi->conn = scpi;
	93
	94	if (hmo_init_device(sdi) != SR_OK)
	95	goto fail;
	96
	97	sr_scpi_close(sdi->conn);
	98
	99	sdi->status = SR_ST_INACTIVE;
	100
	101	return sdi;
	102
	103	fail:
	104	if (hw_info)
	105	sr_scpi_hw_info_free(hw_info);
	106	if (sdi)
	107	sr_dev_inst_free(sdi);
	108	if (devc)
	109	g_free(devc);
	110
	111	return NULL;
	112	}
	113
	114	static GSList scan(GSList options)
	115	{
	116	return sr_scpi_scan(di->priv, options, hmo_probe_serial_device);
	117	}
	118
	119	static GSList *dev_list(void)
	120	{
	121	return ((struct drv_context *)(di->priv))->instances;
	122	}
	123
	124	static void clear_helper(void *priv)
	125	{
	126	unsigned int i;
	127	struct dev_context *devc;
	128	struct scope_config *model;
	129
	130	devc = priv;
	131	model = devc->model_config;
	132
	133	hmo_scope_state_free(devc->model_state);
	134
	135	for (i = 0; i < model->analog_channels; ++i)
	136	g_slist_free(devc->analog_groups[i].channels);
	137
	138	for (i = 0; i < model->digital_pods; ++i) {
	139	g_slist_free(devc->digital_groups[i].channels);
	140	g_free(devc->digital_groups[i].name);
	141	}
	142
	143	g_free(devc->analog_groups);
	144	g_free(devc->digital_groups);
	145
	146	g_free(devc);
	147	}
	148
	149	static int dev_clear(void)
	150	{
	151	return std_dev_clear(di, clear_helper);
	152	}
	153
	154	static int dev_open(struct sr_dev_inst *sdi)
	155	{
	156	if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
	157	return SR_ERR;
	158
	159	if (hmo_scope_state_get(sdi) != SR_OK)
	160	return SR_ERR;
	161
	162	sdi->status = SR_ST_ACTIVE;
	163
	164	return SR_OK;
	165	}
	166
	167	static int dev_close(struct sr_dev_inst *sdi)
	168	{
	169	if (sdi->status == SR_ST_INACTIVE)
	170	return SR_OK;
	171
	172	sr_scpi_close(sdi->conn);
	173
	174	sdi->status = SR_ST_INACTIVE;
	175
	176	return SR_OK;
	177	}
	178
	179	static int cleanup(void)
	180	{
	181	dev_clear();
	182
	183	return SR_OK;
	184	}
	185
	186	static int check_channel_group(struct dev_context *devc,
	187	const struct sr_channel_group *cg)
	188	{
	189	unsigned int i;
	190	struct scope_config *model;
	191
	192	model = devc->model_config;
	193
	194	if (!cg)
	195	return CG_NONE;
	196
	197	for (i = 0; i < model->analog_channels; ++i)
	198	if (cg == &devc->analog_groups[i])
	199	return CG_ANALOG;
	200
	201	for (i = 0; i < model->digital_pods; ++i)
	202	if (cg == &devc->digital_groups[i])
	203	return CG_DIGITAL;
	204
	205	sr_err("Invalid channel group specified.");
	206
	207	return CG_INVALID;
	208	}
	209
	210	static int config_get(int key, GVariant *data, const struct sr_dev_inst sdi,
	211	const struct sr_channel_group *cg)
	212	{
	213	int ret, cg_type;
	214	unsigned int i;
	215	struct dev_context *devc;
	216	struct scope_config *model;
	217	struct scope_state *state;
	218
	219	if (!sdi \|\| !(devc = sdi->priv))
	220	return SR_ERR_ARG;
	221
	222	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
	223	return SR_ERR;
	224
	225	ret = SR_ERR_NA;
	226	model = devc->model_config;
	227	state = devc->model_state;
	228
	229	switch (key) {
	230	case SR_CONF_NUM_TIMEBASE:
	231	*data = g_variant_new_int32(model->num_xdivs);
	232	ret = SR_OK;
	233	break;
	234	case SR_CONF_TIMEBASE:
	235	data = g_variant_new("(tt)", (model->timebases)[state->timebase][0],
	236	(*model->timebases)[state->timebase][1]);
	237	ret = SR_OK;
	238	break;
	239	case SR_CONF_NUM_VDIV:
	240	if (cg_type == CG_NONE) {
	241	sr_err("No channel group specified.");
	242	return SR_ERR_CHANNEL_GROUP;
	243	} else if (cg_type == CG_ANALOG) {
	244	for (i = 0; i < model->analog_channels; ++i) {
	245	if (cg != &devc->analog_groups[i])
	246	continue;
	247	*data = g_variant_new_int32(model->num_ydivs);
	248	ret = SR_OK;
	249	break;
	250	}
	251
	252	} else {
	253	ret = SR_ERR_NA;
	254	}
	255	break;
	256	case SR_CONF_VDIV:
	257	if (cg_type == CG_NONE) {
	258	sr_err("No channel group specified.");
	259	return SR_ERR_CHANNEL_GROUP;
	260	} else if (cg_type == CG_ANALOG) {
	261	for (i = 0; i < model->analog_channels; ++i) {
	262	if (cg != &devc->analog_groups[i])
	263	continue;
	264	*data = g_variant_new("(tt)",
	265	(*model->vdivs)[state->analog_channels[i].vdiv][0],
	266	(*model->vdivs)[state->analog_channels[i].vdiv][1]);
	267	ret = SR_OK;
	268	break;
	269	}
	270
	271	} else {
	272	ret = SR_ERR_NA;
	273	}
	274	break;
	275	case SR_CONF_TRIGGER_SOURCE:
	276	data = g_variant_new_string((model->trigger_sources)[state->trigger_source]);
	277	ret = SR_OK;
	278	break;
	279	case SR_CONF_TRIGGER_SLOPE:
	280	data = g_variant_new_string((model->trigger_slopes)[state->trigger_slope]);
	281	ret = SR_OK;
	282	break;
	283	case SR_CONF_HORIZ_TRIGGERPOS:
	284	*data = g_variant_new_double(state->horiz_triggerpos);
	285	ret = SR_OK;
	286	break;
	287	case SR_CONF_COUPLING:
	288	if (cg_type == CG_NONE) {
	289	sr_err("No channel group specified.");
	290	return SR_ERR_CHANNEL_GROUP;
	291	} else if (cg_type == CG_ANALOG) {
	292	for (i = 0; i < model->analog_channels; ++i) {
	293	if (cg != &devc->analog_groups[i])
	294	continue;
	295	data = g_variant_new_string((model->coupling_options)[state->analog_channels[i].coupling]);
	296	ret = SR_OK;
	297	break;
	298	}
	299
	300	} else {
	301	ret = SR_ERR_NA;
	302	}
	303	break;
	304	case SR_CONF_SAMPLERATE:
	305	*data = g_variant_new_uint64(state->sample_rate);
	306	ret = SR_OK;
	307	break;
	308	default:
	309	ret = SR_ERR_NA;
	310	}
	311
	312	return ret;
	313	}
	314
	315	static GVariant build_tuples(const uint64_t (array)[][2], unsigned int n)
	316	{
	317	unsigned int i;
	318	GVariant *rational[2];
	319	GVariantBuilder gvb;
	320
	321	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
	322
	323	for (i = 0; i < n; i++) {
	324	rational[0] = g_variant_new_uint64((*array)[i][0]);
	325	rational[1] = g_variant_new_uint64((*array)[i][1]);
	326
	327	/* FIXME: Valgrind reports a memory leak here. */
	328	g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
	329	}
	330
	331	return g_variant_builder_end(&gvb);
	332	}
	333
	334	static int config_set(int key, GVariant data, const struct sr_dev_inst sdi,
	335	const struct sr_channel_group *cg)
	336	{
	337	int ret, cg_type;
	338	unsigned int i, j;
	339	char command[MAX_COMMAND_SIZE], float_str[30];
	340	struct dev_context *devc;
	341	struct scope_config *model;
	342	struct scope_state *state;
	343	const char *tmp;
	344	uint64_t p, q;
	345	double tmp_d;
	346	gboolean update_sample_rate;
	347
	348	if (!sdi \|\| !(devc = sdi->priv))
	349	return SR_ERR_ARG;
	350
	351	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
	352	return SR_ERR;
	353
	354	model = devc->model_config;
	355	state = devc->model_state;
	356	update_sample_rate = FALSE;
	357
	358	ret = SR_ERR_NA;
	359
	360	switch (key) {
	361	case SR_CONF_LIMIT_FRAMES:
	362	devc->frame_limit = g_variant_get_uint64(data);
	363	ret = SR_OK;
	364	break;
	365	case SR_CONF_TRIGGER_SOURCE:
	366	tmp = g_variant_get_string(data, NULL);
	367	for (i = 0; (*model->trigger_sources)[i]; i++) {
	368	if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
	369	continue;
	370	state->trigger_source = i;
	371	g_snprintf(command, sizeof(command),
	372	(*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
	373	(*model->trigger_sources)[i]);
	374
	375	ret = sr_scpi_send(sdi->conn, command);
	376	break;
	377	}
	378	break;
	379	case SR_CONF_VDIV:
	380	if (cg_type == CG_NONE) {
	381	sr_err("No channel group specified.");
	382	return SR_ERR_CHANNEL_GROUP;
	383	}
	384
	385	g_variant_get(data, "(tt)", &p, &q);
	386
	387	for (i = 0; i < model->num_vdivs; i++) {
	388	if (p != (*model->vdivs)[i][0] \|\|
	389	q != (*model->vdivs)[i][1])
	390	continue;
	391	for (j = 1; j <= model->analog_channels; ++j) {
	392	if (cg != &devc->analog_groups[j - 1])
	393	continue;
	394	state->analog_channels[j - 1].vdiv = i;
	395	g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
	396	g_snprintf(command, sizeof(command),
	397	(*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
	398	j, float_str);
	399
	400	if (sr_scpi_send(sdi->conn, command) != SR_OK \|\|
	401	sr_scpi_get_opc(sdi->conn) != SR_OK)
	402	return SR_ERR;
	403
	404	break;
	405	}
	406
	407	ret = SR_OK;
	408	break;
	409	}
	410	break;
	411	case SR_CONF_TIMEBASE:
	412	g_variant_get(data, "(tt)", &p, &q);
	413
	414	for (i = 0; i < model->num_timebases; i++) {
	415	if (p != (*model->timebases)[i][0] \|\|
	416	q != (*model->timebases)[i][1])
	417	continue;
	418	state->timebase = i;
	419	g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
	420	g_snprintf(command, sizeof(command),
	421	(*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
	422	float_str);
	423
	424	ret = sr_scpi_send(sdi->conn, command);
	425	update_sample_rate = TRUE;
	426	break;
	427	}
	428	break;
	429	case SR_CONF_HORIZ_TRIGGERPOS:
	430	tmp_d = g_variant_get_double(data);
	431
	432	if (tmp_d < 0.0 \|\| tmp_d > 1.0)
	433	return SR_ERR;
	434
	435	state->horiz_triggerpos = tmp_d;
	436	tmp_d = -(tmp_d - 0.5) *
	437	((double) (*model->timebases)[state->timebase][0] /
	438	(*model->timebases)[state->timebase][1])
	439	* model->num_xdivs;
	440
	441	g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
	442	g_snprintf(command, sizeof(command),
	443	(*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
	444	float_str);
	445
	446	ret = sr_scpi_send(sdi->conn, command);
	447	break;
	448	case SR_CONF_TRIGGER_SLOPE:
	449	tmp = g_variant_get_string(data, NULL);
	450
	451	if (!tmp \|\| !(tmp[0] == 'f' \|\| tmp[0] == 'r'))
	452	return SR_ERR_ARG;
	453
	454	state->trigger_slope = (tmp[0] == 'r') ? 0 : 1;
	455
	456	g_snprintf(command, sizeof(command),
	457	(*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
	458	(state->trigger_slope == 0) ? "POS" : "NEG");
	459
	460	ret = sr_scpi_send(sdi->conn, command);
	461	break;
	462	case SR_CONF_COUPLING:
	463	if (cg_type == CG_NONE) {
	464	sr_err("No channel group specified.");
	465	return SR_ERR_CHANNEL_GROUP;
	466	}
	467
	468	tmp = g_variant_get_string(data, NULL);
	469
	470	for (i = 0; (*model->coupling_options)[i]; i++) {
	471	if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
	472	continue;
	473	for (j = 1; j <= model->analog_channels; ++j) {
	474	if (cg != &devc->analog_groups[j - 1])
	475	continue;
	476	state->analog_channels[j-1].coupling = i;
	477
	478	g_snprintf(command, sizeof(command),
	479	(*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
	480	j, tmp);
	481
	482	if (sr_scpi_send(sdi->conn, command) != SR_OK \|\|
	483	sr_scpi_get_opc(sdi->conn) != SR_OK)
	484	return SR_ERR;
	485	break;
	486	}
	487
	488	ret = SR_OK;
	489	break;
	490	}
	491	break;
	492	default:
	493	ret = SR_ERR_NA;
	494	break;
	495	}
	496
	497	if (ret == SR_OK)
	498	ret = sr_scpi_get_opc(sdi->conn);
	499
	500	if (ret == SR_OK && update_sample_rate)
	501	ret = hmo_update_sample_rate(sdi);
	502
	503	return ret;
	504	}
	505
	506	static int config_list(int key, GVariant *data, const struct sr_dev_inst sdi,
	507	const struct sr_channel_group *cg)
	508	{
	509	int cg_type;
	510	struct dev_context *devc;
	511	struct scope_config *model;
	512
	513	if (!sdi \|\| !(devc = sdi->priv))
	514	return SR_ERR_ARG;
	515
	516	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
	517	return SR_ERR;
	518
	519	model = devc->model_config;
	520
	521	switch (key) {
	522	case SR_CONF_DEVICE_OPTIONS:
	523	if (cg_type == CG_NONE) {
	524	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	525	model->hw_caps, model->num_hwcaps,
	526	sizeof(int32_t));
	527	} else if (cg_type == CG_ANALOG) {
	528	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	529	model->analog_hwcaps, model->num_analog_hwcaps,
	530	sizeof(int32_t));
	531	} else {
	532	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	533	NULL, 0, sizeof(int32_t));
	534	}
	535	break;
	536	case SR_CONF_COUPLING:
	537	if (cg_type == CG_NONE)
	538	return SR_ERR_CHANNEL_GROUP;
	539	data = g_variant_new_strv(model->coupling_options,
	540	g_strv_length((char *)model->coupling_options));
	541	break;
	542	case SR_CONF_TRIGGER_SOURCE:
	543	data = g_variant_new_strv(model->trigger_sources,
	544	g_strv_length((char *)model->trigger_sources));
	545	break;
	546	case SR_CONF_TRIGGER_SLOPE:
	547	data = g_variant_new_strv(model->trigger_slopes,
	548	g_strv_length((char *)model->trigger_slopes));
	549	break;
	550	case SR_CONF_TIMEBASE:
	551	*data = build_tuples(model->timebases, model->num_timebases);
	552	break;
	553	case SR_CONF_VDIV:
	554	if (cg_type == CG_NONE)
	555	return SR_ERR_CHANNEL_GROUP;
	556	*data = build_tuples(model->vdivs, model->num_vdivs);
	557	break;
	558	default:
	559	return SR_ERR_NA;
	560	}
	561
	562	return SR_OK;
	563	}
	564
	565	SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
	566	{
	567	char command[MAX_COMMAND_SIZE];
	568	struct sr_channel *ch;
	569	struct dev_context *devc;
	570	struct scope_config *model;
	571
	572	devc = sdi->priv;
	573	model = devc->model_config;
	574
	575	ch = devc->current_channel->data;
	576
	577	switch (ch->type) {
	578	case SR_CHANNEL_ANALOG:
	579	g_snprintf(command, sizeof(command),
	580	(*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
	581	ch->index + 1);
	582	break;
	583	case SR_CHANNEL_LOGIC:
	584	g_snprintf(command, sizeof(command),
	585	(*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
	586	ch->index < 8 ? 1 : 2);
	587	break;
	588	default:
	589	sr_err("Invalid channel type.");
	590	break;
	591	}
	592
	593	return sr_scpi_send(sdi->conn, command);
	594	}
	595
	596	static int hmo_check_channels(GSList *channels)
	597	{
	598	GSList *l;
	599	struct sr_channel *ch;
	600	gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
	601
	602	enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
	603
	604	for (l = channels; l; l = l->next) {
	605	ch = l->data;
	606	switch (ch->type) {
	607	case SR_CHANNEL_ANALOG:
	608	if (ch->index == 2)
	609	enabled_chan3 = TRUE;
	610	else if (ch->index == 3)
	611	enabled_chan4 = TRUE;
	612	break;
	613	case SR_CHANNEL_LOGIC:
	614	if (ch->index < 8)
	615	enabled_pod1 = TRUE;
	616	else
	617	enabled_pod2 = TRUE;
	618	break;
	619	default:
	620	return SR_ERR;
	621	}
	622	}
	623
	624	if ((enabled_pod1 && enabled_chan3) \|\|
	625	(enabled_pod2 && enabled_chan4))
	626	return SR_ERR;
	627
	628	return SR_OK;
	629	}
	630
	631	static int hmo_setup_channels(const struct sr_dev_inst *sdi)
	632	{
	633	GSList *l;
	634	unsigned int i;
	635	gboolean *pod_enabled, setup_changed;
	636	char command[MAX_COMMAND_SIZE];
	637	struct scope_state *state;
	638	struct scope_config *model;
	639	struct sr_channel *ch;
	640	struct dev_context *devc;
	641	struct sr_scpi_dev_inst *scpi;
	642
	643	devc = sdi->priv;
	644	scpi = sdi->conn;
	645	state = devc->model_state;
	646	model = devc->model_config;
	647	setup_changed = FALSE;
	648
	649	pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
	650
	651	for (l = sdi->channels; l; l = l->next) {
	652	ch = l->data;
	653	switch (ch->type) {
	654	case SR_CHANNEL_ANALOG:
	655	if (ch->enabled == state->analog_channels[ch->index].state)
	656	break;
	657	g_snprintf(command, sizeof(command),
	658	(*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
	659	ch->index + 1, ch->enabled);
	660
	661	if (sr_scpi_send(scpi, command) != SR_OK)
	662	return SR_ERR;
	663	state->analog_channels[ch->index].state = ch->enabled;
	664	setup_changed = TRUE;
	665	break;
	666	case SR_CHANNEL_LOGIC:
	667	/*
	668	* A digital POD needs to be enabled for every group of
	669	* 8 channels.
	670	*/
	671	if (ch->enabled)
	672	pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;
	673
	674	if (ch->enabled == state->digital_channels[ch->index])
	675	break;
	676	g_snprintf(command, sizeof(command),
	677	(*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
	678	ch->index, ch->enabled);
	679
	680	if (sr_scpi_send(scpi, command) != SR_OK)
	681	return SR_ERR;
	682
	683	state->digital_channels[ch->index] = ch->enabled;
	684	setup_changed = TRUE;
	685	break;
	686	default:
	687	return SR_ERR;
	688	}
	689	}
	690
	691	for (i = 1; i <= model->digital_pods; ++i) {
	692	if (state->digital_pods[i - 1] == pod_enabled[i - 1])
	693	continue;
	694	g_snprintf(command, sizeof(command),
	695	(*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
	696	i, pod_enabled[i - 1]);
	697	if (sr_scpi_send(scpi, command) != SR_OK)
	698	return SR_ERR;
	699	state->digital_pods[i - 1] = pod_enabled[i - 1];
	700	setup_changed = TRUE;
	701	}
	702
	703	g_free(pod_enabled);
	704
	705	if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
	706	return SR_ERR;
	707
	708	return SR_OK;
	709	}
	710
	711	static int dev_acquisition_start(const struct sr_dev_inst sdi, void cb_data)
	712	{
	713	GSList *l;
	714	gboolean digital_added;
	715	struct sr_channel *ch;
	716	struct dev_context *devc;
	717	struct sr_scpi_dev_inst *scpi;
	718
	719	if (sdi->status != SR_ST_ACTIVE)
	720	return SR_ERR_DEV_CLOSED;
	721
	722	scpi = sdi->conn;
	723	devc = sdi->priv;
	724	digital_added = FALSE;
	725
	726	for (l = sdi->channels; l; l = l->next) {
	727	ch = l->data;
	728	if (!ch->enabled)
	729	continue;
	730	/* Only add a single digital channel. */
	731	if (ch->type != SR_CHANNEL_LOGIC \|\| !digital_added) {
	732	devc->enabled_channels = g_slist_append(
	733	devc->enabled_channels, ch);
	734	if (ch->type == SR_CHANNEL_LOGIC)
	735	digital_added = TRUE;
	736	}
	737	}
	738
	739	if (!devc->enabled_channels)
	740	return SR_ERR;
	741
	742	if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
	743	sr_err("Invalid channel configuration specified!");
	744	return SR_ERR_NA;
	745	}
	746
	747	if (hmo_setup_channels(sdi) != SR_OK) {
	748	sr_err("Failed to setup channel configuration!");
	749	return SR_ERR;
	750	}
	751
	752	sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
	753	hmo_receive_data, (void *)sdi);
	754
	755	/* Send header packet to the session bus. */
	756	std_session_send_df_header(cb_data, LOG_PREFIX);
	757
	758	devc->current_channel = devc->enabled_channels;
	759
	760	return hmo_request_data(sdi);
	761	}
	762
	763	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	764	{
	765	struct dev_context *devc;
	766	struct sr_scpi_dev_inst *scpi;
	767	struct sr_datafeed_packet packet;
	768
	769	(void)cb_data;
	770
	771	packet.type = SR_DF_END;
	772	packet.payload = NULL;
	773	sr_session_send(sdi, &packet);
	774
	775	if (sdi->status != SR_ST_ACTIVE)
	776	return SR_ERR_DEV_CLOSED;
	777
	778	devc = sdi->priv;
	779
	780	devc->num_frames = 0;
	781	g_slist_free(devc->enabled_channels);
	782	devc->enabled_channels = NULL;
	783	scpi = sdi->conn;
	784	sr_scpi_source_remove(sdi->session, scpi);
	785
	786	return SR_OK;
	787	}
	788
	789	SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
	790	.name = "hameg-hmo",
	791	.longname = "Hameg HMO",
	792	.api_version = 1,
	793	.init = init,
	794	.cleanup = cleanup,
	795	.scan = scan,
	796	.dev_list = dev_list,
	797	.dev_clear = dev_clear,
	798	.config_get = config_get,
	799	.config_set = config_set,
	800	.config_list = config_list,
	801	.dev_open = dev_open,
	802	.dev_close = dev_close,
	803	.dev_acquisition_start = dev_acquisition_start,
	804	.dev_acquisition_stop = dev_acquisition_stop,
	805	.priv = NULL,
	806	};