[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 uint32_t scanopts[] = {
	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)
{
	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(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(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;
	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(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;
	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(uint32_t 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_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) {
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				model->hw_caps, model->num_hwcaps,
				sizeof(uint32_t));
		} else if (cg_type == CG_ANALOG) {
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				model->analog_hwcaps, model->num_analog_hwcaps,
				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:
		*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;

	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);

	/* 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 uint32_t scanopts[] = {
	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	struct dev_context *devc;
	127
	128	devc = priv;
	129
	130	hmo_scope_state_free(devc->model_state);
	131
	132	g_free(devc->analog_groups);
	133	g_free(devc->digital_groups);
	134
	135	g_free(devc);
	136	}
	137
	138	static int dev_clear(void)
	139	{
	140	return std_dev_clear(di, clear_helper);
	141	}
	142
	143	static int dev_open(struct sr_dev_inst *sdi)
	144	{
	145	if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
	146	return SR_ERR;
	147
	148	if (hmo_scope_state_get(sdi) != SR_OK)
	149	return SR_ERR;
	150
	151	sdi->status = SR_ST_ACTIVE;
	152
	153	return SR_OK;
	154	}
	155
	156	static int dev_close(struct sr_dev_inst *sdi)
	157	{
	158	if (sdi->status == SR_ST_INACTIVE)
	159	return SR_OK;
	160
	161	sr_scpi_close(sdi->conn);
	162
	163	sdi->status = SR_ST_INACTIVE;
	164
	165	return SR_OK;
	166	}
	167
	168	static int cleanup(void)
	169	{
	170	dev_clear();
	171
	172	return SR_OK;
	173	}
	174
	175	static int check_channel_group(struct dev_context *devc,
	176	const struct sr_channel_group *cg)
	177	{
	178	unsigned int i;
	179	struct scope_config *model;
	180
	181	model = devc->model_config;
	182
	183	if (!cg)
	184	return CG_NONE;
	185
	186	for (i = 0; i < model->analog_channels; ++i)
	187	if (cg == devc->analog_groups[i])
	188	return CG_ANALOG;
	189
	190	for (i = 0; i < model->digital_pods; ++i)
	191	if (cg == devc->digital_groups[i])
	192	return CG_DIGITAL;
	193
	194	sr_err("Invalid channel group specified.");
	195
	196	return CG_INVALID;
	197	}
	198
	199	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	200	const struct sr_channel_group *cg)
	201	{
	202	int ret, cg_type;
	203	unsigned int i;
	204	struct dev_context *devc;
	205	struct scope_config *model;
	206	struct scope_state *state;
	207
	208	if (!sdi \|\| !(devc = sdi->priv))
	209	return SR_ERR_ARG;
	210
	211	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
	212	return SR_ERR;
	213
	214	ret = SR_ERR_NA;
	215	model = devc->model_config;
	216	state = devc->model_state;
	217
	218	switch (key) {
	219	case SR_CONF_NUM_TIMEBASE:
	220	*data = g_variant_new_int32(model->num_xdivs);
	221	ret = SR_OK;
	222	break;
	223	case SR_CONF_TIMEBASE:
	224	data = g_variant_new("(tt)", (model->timebases)[state->timebase][0],
	225	(*model->timebases)[state->timebase][1]);
	226	ret = SR_OK;
	227	break;
	228	case SR_CONF_NUM_VDIV:
	229	if (cg_type == CG_NONE) {
	230	sr_err("No channel group specified.");
	231	return SR_ERR_CHANNEL_GROUP;
	232	} else if (cg_type == CG_ANALOG) {
	233	for (i = 0; i < model->analog_channels; ++i) {
	234	if (cg != devc->analog_groups[i])
	235	continue;
	236	*data = g_variant_new_int32(model->num_ydivs);
	237	ret = SR_OK;
	238	break;
	239	}
	240
	241	} else {
	242	ret = SR_ERR_NA;
	243	}
	244	break;
	245	case SR_CONF_VDIV:
	246	if (cg_type == CG_NONE) {
	247	sr_err("No channel group specified.");
	248	return SR_ERR_CHANNEL_GROUP;
	249	} else if (cg_type == CG_ANALOG) {
	250	for (i = 0; i < model->analog_channels; ++i) {
	251	if (cg != devc->analog_groups[i])
	252	continue;
	253	*data = g_variant_new("(tt)",
	254	(*model->vdivs)[state->analog_channels[i].vdiv][0],
	255	(*model->vdivs)[state->analog_channels[i].vdiv][1]);
	256	ret = SR_OK;
	257	break;
	258	}
	259
	260	} else {
	261	ret = SR_ERR_NA;
	262	}
	263	break;
	264	case SR_CONF_TRIGGER_SOURCE:
	265	data = g_variant_new_string((model->trigger_sources)[state->trigger_source]);
	266	ret = SR_OK;
	267	break;
	268	case SR_CONF_TRIGGER_SLOPE:
	269	data = g_variant_new_string((model->trigger_slopes)[state->trigger_slope]);
	270	ret = SR_OK;
	271	break;
	272	case SR_CONF_HORIZ_TRIGGERPOS:
	273	*data = g_variant_new_double(state->horiz_triggerpos);
	274	ret = SR_OK;
	275	break;
	276	case SR_CONF_COUPLING:
	277	if (cg_type == CG_NONE) {
	278	sr_err("No channel group specified.");
	279	return SR_ERR_CHANNEL_GROUP;
	280	} else if (cg_type == CG_ANALOG) {
	281	for (i = 0; i < model->analog_channels; ++i) {
	282	if (cg != devc->analog_groups[i])
	283	continue;
	284	data = g_variant_new_string((model->coupling_options)[state->analog_channels[i].coupling]);
	285	ret = SR_OK;
	286	break;
	287	}
	288
	289	} else {
	290	ret = SR_ERR_NA;
	291	}
	292	break;
	293	case SR_CONF_SAMPLERATE:
	294	*data = g_variant_new_uint64(state->sample_rate);
	295	ret = SR_OK;
	296	break;
	297	default:
	298	ret = SR_ERR_NA;
	299	}
	300
	301	return ret;
	302	}
	303
	304	static GVariant build_tuples(const uint64_t (array)[][2], unsigned int n)
	305	{
	306	unsigned int i;
	307	GVariant *rational[2];
	308	GVariantBuilder gvb;
	309
	310	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
	311
	312	for (i = 0; i < n; i++) {
	313	rational[0] = g_variant_new_uint64((*array)[i][0]);
	314	rational[1] = g_variant_new_uint64((*array)[i][1]);
	315
	316	/* FIXME: Valgrind reports a memory leak here. */
	317	g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
	318	}
	319
	320	return g_variant_builder_end(&gvb);
	321	}
	322
	323	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
	324	const struct sr_channel_group *cg)
	325	{
	326	int ret, cg_type;
	327	unsigned int i, j;
	328	char command[MAX_COMMAND_SIZE], float_str[30];
	329	struct dev_context *devc;
	330	struct scope_config *model;
	331	struct scope_state *state;
	332	const char *tmp;
	333	uint64_t p, q;
	334	double tmp_d;
	335	gboolean update_sample_rate;
	336
	337	if (!sdi \|\| !(devc = sdi->priv))
	338	return SR_ERR_ARG;
	339
	340	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
	341	return SR_ERR;
	342
	343	model = devc->model_config;
	344	state = devc->model_state;
	345	update_sample_rate = FALSE;
	346
	347	ret = SR_ERR_NA;
	348
	349	switch (key) {
	350	case SR_CONF_LIMIT_FRAMES:
	351	devc->frame_limit = g_variant_get_uint64(data);
	352	ret = SR_OK;
	353	break;
	354	case SR_CONF_TRIGGER_SOURCE:
	355	tmp = g_variant_get_string(data, NULL);
	356	for (i = 0; (*model->trigger_sources)[i]; i++) {
	357	if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
	358	continue;
	359	state->trigger_source = i;
	360	g_snprintf(command, sizeof(command),
	361	(*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
	362	(*model->trigger_sources)[i]);
	363
	364	ret = sr_scpi_send(sdi->conn, command);
	365	break;
	366	}
	367	break;
	368	case SR_CONF_VDIV:
	369	if (cg_type == CG_NONE) {
	370	sr_err("No channel group specified.");
	371	return SR_ERR_CHANNEL_GROUP;
	372	}
	373
	374	g_variant_get(data, "(tt)", &p, &q);
	375
	376	for (i = 0; i < model->num_vdivs; i++) {
	377	if (p != (*model->vdivs)[i][0] \|\|
	378	q != (*model->vdivs)[i][1])
	379	continue;
	380	for (j = 1; j <= model->analog_channels; ++j) {
	381	if (cg != devc->analog_groups[j - 1])
	382	continue;
	383	state->analog_channels[j - 1].vdiv = i;
	384	g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
	385	g_snprintf(command, sizeof(command),
	386	(*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
	387	j, float_str);
	388
	389	if (sr_scpi_send(sdi->conn, command) != SR_OK \|\|
	390	sr_scpi_get_opc(sdi->conn) != SR_OK)
	391	return SR_ERR;
	392
	393	break;
	394	}
	395
	396	ret = SR_OK;
	397	break;
	398	}
	399	break;
	400	case SR_CONF_TIMEBASE:
	401	g_variant_get(data, "(tt)", &p, &q);
	402
	403	for (i = 0; i < model->num_timebases; i++) {
	404	if (p != (*model->timebases)[i][0] \|\|
	405	q != (*model->timebases)[i][1])
	406	continue;
	407	state->timebase = i;
	408	g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
	409	g_snprintf(command, sizeof(command),
	410	(*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
	411	float_str);
	412
	413	ret = sr_scpi_send(sdi->conn, command);
	414	update_sample_rate = TRUE;
	415	break;
	416	}
	417	break;
	418	case SR_CONF_HORIZ_TRIGGERPOS:
	419	tmp_d = g_variant_get_double(data);
	420
	421	if (tmp_d < 0.0 \|\| tmp_d > 1.0)
	422	return SR_ERR;
	423
	424	state->horiz_triggerpos = tmp_d;
	425	tmp_d = -(tmp_d - 0.5) *
	426	((double) (*model->timebases)[state->timebase][0] /
	427	(*model->timebases)[state->timebase][1])
	428	* model->num_xdivs;
	429
	430	g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
	431	g_snprintf(command, sizeof(command),
	432	(*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
	433	float_str);
	434
	435	ret = sr_scpi_send(sdi->conn, command);
	436	break;
	437	case SR_CONF_TRIGGER_SLOPE:
	438	tmp = g_variant_get_string(data, NULL);
	439
	440	if (!tmp \|\| !(tmp[0] == 'f' \|\| tmp[0] == 'r'))
	441	return SR_ERR_ARG;
	442
	443	state->trigger_slope = (tmp[0] == 'r') ? 0 : 1;
	444
	445	g_snprintf(command, sizeof(command),
	446	(*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
	447	(state->trigger_slope == 0) ? "POS" : "NEG");
	448
	449	ret = sr_scpi_send(sdi->conn, command);
	450	break;
	451	case SR_CONF_COUPLING:
	452	if (cg_type == CG_NONE) {
	453	sr_err("No channel group specified.");
	454	return SR_ERR_CHANNEL_GROUP;
	455	}
	456
	457	tmp = g_variant_get_string(data, NULL);
	458
	459	for (i = 0; (*model->coupling_options)[i]; i++) {
	460	if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
	461	continue;
	462	for (j = 1; j <= model->analog_channels; ++j) {
	463	if (cg != devc->analog_groups[j - 1])
	464	continue;
	465	state->analog_channels[j-1].coupling = i;
	466
	467	g_snprintf(command, sizeof(command),
	468	(*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
	469	j, tmp);
	470
	471	if (sr_scpi_send(sdi->conn, command) != SR_OK \|\|
	472	sr_scpi_get_opc(sdi->conn) != SR_OK)
	473	return SR_ERR;
	474	break;
	475	}
	476
	477	ret = SR_OK;
	478	break;
	479	}
	480	break;
	481	default:
	482	ret = SR_ERR_NA;
	483	break;
	484	}
	485
	486	if (ret == SR_OK)
	487	ret = sr_scpi_get_opc(sdi->conn);
	488
	489	if (ret == SR_OK && update_sample_rate)
	490	ret = hmo_update_sample_rate(sdi);
	491
	492	return ret;
	493	}
	494
	495	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	496	const struct sr_channel_group *cg)
	497	{
	498	int cg_type;
	499	struct dev_context *devc;
	500	struct scope_config *model;
	501
	502	if (!sdi \|\| !(devc = sdi->priv))
	503	return SR_ERR_ARG;
	504
	505	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
	506	return SR_ERR;
	507
	508	model = devc->model_config;
	509
	510	switch (key) {
	511	case SR_CONF_SCAN_OPTIONS:
	512	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	513	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
	514	break;
	515	case SR_CONF_DEVICE_OPTIONS:
	516	if (cg_type == CG_NONE) {
	517	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	518	model->hw_caps, model->num_hwcaps,
	519	sizeof(uint32_t));
	520	} else if (cg_type == CG_ANALOG) {
	521	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	522	model->analog_hwcaps, model->num_analog_hwcaps,
	523	sizeof(uint32_t));
	524	} else {
	525	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	526	NULL, 0, sizeof(uint32_t));
	527	}
	528	break;
	529	case SR_CONF_COUPLING:
	530	if (cg_type == CG_NONE)
	531	return SR_ERR_CHANNEL_GROUP;
	532	data = g_variant_new_strv(model->coupling_options,
	533	g_strv_length((char *)model->coupling_options));
	534	break;
	535	case SR_CONF_TRIGGER_SOURCE:
	536	data = g_variant_new_strv(model->trigger_sources,
	537	g_strv_length((char *)model->trigger_sources));
	538	break;
	539	case SR_CONF_TRIGGER_SLOPE:
	540	data = g_variant_new_strv(model->trigger_slopes,
	541	g_strv_length((char *)model->trigger_slopes));
	542	break;
	543	case SR_CONF_TIMEBASE:
	544	*data = build_tuples(model->timebases, model->num_timebases);
	545	break;
	546	case SR_CONF_VDIV:
	547	if (cg_type == CG_NONE)
	548	return SR_ERR_CHANNEL_GROUP;
	549	*data = build_tuples(model->vdivs, model->num_vdivs);
	550	break;
	551	default:
	552	return SR_ERR_NA;
	553	}
	554
	555	return SR_OK;
	556	}
	557
	558	SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
	559	{
	560	char command[MAX_COMMAND_SIZE];
	561	struct sr_channel *ch;
	562	struct dev_context *devc;
	563	struct scope_config *model;
	564
	565	devc = sdi->priv;
	566	model = devc->model_config;
	567
	568	ch = devc->current_channel->data;
	569
	570	switch (ch->type) {
	571	case SR_CHANNEL_ANALOG:
	572	g_snprintf(command, sizeof(command),
	573	(*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
	574	ch->index + 1);
	575	break;
	576	case SR_CHANNEL_LOGIC:
	577	g_snprintf(command, sizeof(command),
	578	(*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
	579	ch->index < 8 ? 1 : 2);
	580	break;
	581	default:
	582	sr_err("Invalid channel type.");
	583	break;
	584	}
	585
	586	return sr_scpi_send(sdi->conn, command);
	587	}
	588
	589	static int hmo_check_channels(GSList *channels)
	590	{
	591	GSList *l;
	592	struct sr_channel *ch;
	593	gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
	594
	595	enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
	596
	597	for (l = channels; l; l = l->next) {
	598	ch = l->data;
	599	switch (ch->type) {
	600	case SR_CHANNEL_ANALOG:
	601	if (ch->index == 2)
	602	enabled_chan3 = TRUE;
	603	else if (ch->index == 3)
	604	enabled_chan4 = TRUE;
	605	break;
	606	case SR_CHANNEL_LOGIC:
	607	if (ch->index < 8)
	608	enabled_pod1 = TRUE;
	609	else
	610	enabled_pod2 = TRUE;
	611	break;
	612	default:
	613	return SR_ERR;
	614	}
	615	}
	616
	617	if ((enabled_pod1 && enabled_chan3) \|\|
	618	(enabled_pod2 && enabled_chan4))
	619	return SR_ERR;
	620
	621	return SR_OK;
	622	}
	623
	624	static int hmo_setup_channels(const struct sr_dev_inst *sdi)
	625	{
	626	GSList *l;
	627	unsigned int i;
	628	gboolean *pod_enabled, setup_changed;
	629	char command[MAX_COMMAND_SIZE];
	630	struct scope_state *state;
	631	struct scope_config *model;
	632	struct sr_channel *ch;
	633	struct dev_context *devc;
	634	struct sr_scpi_dev_inst *scpi;
	635
	636	devc = sdi->priv;
	637	scpi = sdi->conn;
	638	state = devc->model_state;
	639	model = devc->model_config;
	640	setup_changed = FALSE;
	641
	642	pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
	643
	644	for (l = sdi->channels; l; l = l->next) {
	645	ch = l->data;
	646	switch (ch->type) {
	647	case SR_CHANNEL_ANALOG:
	648	if (ch->enabled == state->analog_channels[ch->index].state)
	649	break;
	650	g_snprintf(command, sizeof(command),
	651	(*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
	652	ch->index + 1, ch->enabled);
	653
	654	if (sr_scpi_send(scpi, command) != SR_OK)
	655	return SR_ERR;
	656	state->analog_channels[ch->index].state = ch->enabled;
	657	setup_changed = TRUE;
	658	break;
	659	case SR_CHANNEL_LOGIC:
	660	/*
	661	* A digital POD needs to be enabled for every group of
	662	* 8 channels.
	663	*/
	664	if (ch->enabled)
	665	pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;
	666
	667	if (ch->enabled == state->digital_channels[ch->index])
	668	break;
	669	g_snprintf(command, sizeof(command),
	670	(*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
	671	ch->index, ch->enabled);
	672
	673	if (sr_scpi_send(scpi, command) != SR_OK)
	674	return SR_ERR;
	675
	676	state->digital_channels[ch->index] = ch->enabled;
	677	setup_changed = TRUE;
	678	break;
	679	default:
	680	return SR_ERR;
	681	}
	682	}
	683
	684	for (i = 1; i <= model->digital_pods; ++i) {
	685	if (state->digital_pods[i - 1] == pod_enabled[i - 1])
	686	continue;
	687	g_snprintf(command, sizeof(command),
	688	(*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
	689	i, pod_enabled[i - 1]);
	690	if (sr_scpi_send(scpi, command) != SR_OK)
	691	return SR_ERR;
	692	state->digital_pods[i - 1] = pod_enabled[i - 1];
	693	setup_changed = TRUE;
	694	}
	695
	696	g_free(pod_enabled);
	697
	698	if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
	699	return SR_ERR;
	700
	701	return SR_OK;
	702	}
	703
	704	static int dev_acquisition_start(const struct sr_dev_inst sdi, void cb_data)
	705	{
	706	GSList *l;
	707	gboolean digital_added;
	708	struct sr_channel *ch;
	709	struct dev_context *devc;
	710	struct sr_scpi_dev_inst *scpi;
	711
	712	if (sdi->status != SR_ST_ACTIVE)
	713	return SR_ERR_DEV_CLOSED;
	714
	715	scpi = sdi->conn;
	716	devc = sdi->priv;
	717	digital_added = FALSE;
	718
	719	g_slist_free(devc->enabled_channels);
	720	devc->enabled_channels = NULL;
	721
	722	for (l = sdi->channels; l; l = l->next) {
	723	ch = l->data;
	724	if (!ch->enabled)
	725	continue;
	726	/* Only add a single digital channel. */
	727	if (ch->type != SR_CHANNEL_LOGIC \|\| !digital_added) {
	728	devc->enabled_channels = g_slist_append(
	729	devc->enabled_channels, ch);
	730	if (ch->type == SR_CHANNEL_LOGIC)
	731	digital_added = TRUE;
	732	}
	733	}
	734
	735	if (!devc->enabled_channels)
	736	return SR_ERR;
	737
	738	if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
	739	sr_err("Invalid channel configuration specified!");
	740	return SR_ERR_NA;
	741	}
	742
	743	if (hmo_setup_channels(sdi) != SR_OK) {
	744	sr_err("Failed to setup channel configuration!");
	745	return SR_ERR;
	746	}
	747
	748	sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
	749	hmo_receive_data, (void *)sdi);
	750
	751	/* Send header packet to the session bus. */
	752	std_session_send_df_header(cb_data, LOG_PREFIX);
	753
	754	devc->current_channel = devc->enabled_channels;
	755
	756	return hmo_request_data(sdi);
	757	}
	758
	759	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	760	{
	761	struct dev_context *devc;
	762	struct sr_scpi_dev_inst *scpi;
	763	struct sr_datafeed_packet packet;
	764
	765	(void)cb_data;
	766
	767	packet.type = SR_DF_END;
	768	packet.payload = NULL;
	769	sr_session_send(sdi, &packet);
	770
	771	if (sdi->status != SR_ST_ACTIVE)
	772	return SR_ERR_DEV_CLOSED;
	773
	774	devc = sdi->priv;
	775
	776	devc->num_frames = 0;
	777	g_slist_free(devc->enabled_channels);
	778	devc->enabled_channels = NULL;
	779	scpi = sdi->conn;
	780	sr_scpi_source_remove(sdi->session, scpi);
	781
	782	return SR_OK;
	783	}
	784
	785	SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
	786	.name = "hameg-hmo",
	787	.longname = "Hameg HMO",
	788	.api_version = 1,
	789	.init = init,
	790	.cleanup = cleanup,
	791	.scan = scan,
	792	.dev_list = dev_list,
	793	.dev_clear = dev_clear,
	794	.config_get = config_get,
	795	.config_set = config_set,
	796	.config_list = config_list,
	797	.dev_open = dev_open,
	798	.dev_close = dev_close,
	799	.dev_acquisition_start = dev_acquisition_start,
	800	.dev_acquisition_stop = dev_acquisition_stop,
	801	.priv = NULL,
	802	};