[libsigrok.git] / 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 <glib/gstdio.h>
#include "protocol.h"

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

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

struct usb_id_info {
	uint16_t vendor_id;
	uint16_t product_id;
};

static struct usb_id_info ho_models[] = {
	{ 0x0403, 0xed72 }, /* HO720 */
	{ 0x0403, 0xed73 }, /* HO730 */
};

enum {
	PG_INVALID = -1,
	PG_NONE,
	PG_ANALOG,
	PG_DIGITAL,
};

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

/**
 * Find USB serial devices via the USB vendor ID and product ID.
 *
 * @param vendor_id Vendor ID of the USB device.
 * @param product_id Product ID of the USB device.
 *
 * @return A GSList of strings containing the path of the serial device or
 *         NULL if no serial device is found. The returned list must be freed
 *         by the caller.
 */
static GSList *auto_find_usb(uint16_t vendor_id, uint16_t product_id)
{
#ifdef __linux__
	const gchar *usb_dev;
	const char device_tree[] = "/sys/bus/usb/devices/";
	GDir *devices_dir, *device_dir;
	GSList *l = NULL;
	GSList *tty_devs;
	GSList *matched_paths;
	FILE *fd;
	char tmp[5];
	gchar *vendor_path, *product_path, *path_copy;
	gchar *prefix, *subdir_path, *device_path, *tty_path;
	unsigned long read_vendor_id, read_product_id;
	const char *file;

	l = NULL;
	tty_devs = NULL;
	matched_paths = NULL;

	if (!(devices_dir = g_dir_open(device_tree, 0, NULL)))
		return NULL;

	/*
	 * Find potential candidates using the vendor ID and product ID
	 * and store them in matched_paths.
	 */
	while ((usb_dev = g_dir_read_name(devices_dir))) {
		vendor_path = g_strconcat(device_tree,
					  usb_dev, "/idVendor", NULL);
		product_path = g_strconcat(device_tree,
					   usb_dev, "/idProduct", NULL);

		if (!g_file_test(vendor_path, G_FILE_TEST_EXISTS) ||
		    !g_file_test(product_path, G_FILE_TEST_EXISTS))
			goto skip_device;

		if ((fd = g_fopen(vendor_path, "r")) == NULL)
			goto skip_device;

		if (fgets(tmp, sizeof(tmp), fd) == NULL) {
			fclose(fd);
			goto skip_device;
		}
		read_vendor_id = strtoul(tmp, NULL, 16);

		fclose(fd);

		if ((fd = g_fopen(product_path, "r")) == NULL)
			goto skip_device;

		if (fgets(tmp, sizeof(tmp), fd) == NULL) {
			fclose(fd);
			goto skip_device;
		}
		read_product_id = strtoul(tmp, NULL, 16);

		fclose(fd);

		if (vendor_id == read_vendor_id &&
		    product_id == read_product_id) {
			path_copy = g_strdup(usb_dev);
			matched_paths = g_slist_prepend(matched_paths,
							path_copy);
		}

skip_device:
		g_free(vendor_path);
		g_free(product_path);
	}
	g_dir_close(devices_dir);

	/* For every matched device try to find a ttyUSBX subfolder. */
	for (l = matched_paths; l; l = l->next) {
		subdir_path = NULL;

		device_path = g_strconcat(device_tree, l->data, NULL);

		if (!(device_dir = g_dir_open(device_path, 0, NULL))) {
			g_free(device_path);
			continue;
		}

		prefix = g_strconcat(l->data, ":", NULL);

		while ((file = g_dir_read_name(device_dir))) {
			if (g_str_has_prefix(file, prefix)) {
				subdir_path = g_strconcat(device_path,
						"/", file, NULL);
				break;
			}
		}
		g_dir_close(device_dir);

		g_free(prefix);
		g_free(device_path);

		if (subdir_path) {
			if (!(device_dir = g_dir_open(subdir_path, 0, NULL))) {
				g_free(subdir_path);
				continue;
			}
			g_free(subdir_path);

			while ((file = g_dir_read_name(device_dir))) {
				if (g_str_has_prefix(file, "ttyUSB")) {
					tty_path = g_strconcat("/dev/",
							       file, NULL);
					sr_dbg("Found USB device %04x:%04x attached to %s.",
					       vendor_id, product_id, tty_path);
					tty_devs = g_slist_prepend(tty_devs,
							tty_path);
					break;
				}
			}
			g_dir_close(device_dir);
		}
	}
	g_slist_free_full(matched_paths, g_free);

	return tty_devs;
#else
	return NULL;
#endif
}

static GSList *scan(GSList *options)
{
	GSList *devices;
	struct drv_context *drvc;
	struct sr_dev_inst *sdi;
	const char *serial_device, *serial_options;
	GSList *l, *tty_devs;
	unsigned int i;

	serial_device = NULL;
	serial_options = SERIALCOMM;
	sdi = NULL;
	devices = NULL;
	drvc = di->priv;
	drvc->instances = NULL;

	if (sr_serial_extract_options(options, &serial_device,
				      &serial_options) == SR_OK) {
		sdi = hmo_probe_serial_device(serial_device, serial_options);
		if (sdi != NULL) {
			devices = g_slist_append(devices, sdi);
			drvc->instances = g_slist_append(drvc->instances, sdi);
		}
	} else {
		tty_devs = NULL;

		for (i = 0; i < ARRAY_SIZE(ho_models); i++) {
			if ((l = auto_find_usb(ho_models[i].vendor_id,
					   ho_models[i].product_id)) == NULL)
				continue;
			tty_devs = g_slist_concat(tty_devs, l);
		}

		for (l = tty_devs; l; l = l->next) {
			sdi = hmo_probe_serial_device(l->data, serial_options);
			if (sdi != NULL) {
				devices = g_slist_append(devices, sdi);
				drvc->instances = g_slist_append(drvc->instances, sdi);
			}
		}

		g_slist_free_full(tty_devs, g_free);
	}

	return devices;
}

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].probes);

	for (i = 0; i < model->digital_pods; ++i) {
		g_slist_free(devc->digital_groups[i].probes);
		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_probe_group(struct dev_context *devc,
			     const struct sr_probe_group *probe_group)
{
	unsigned int i;
	struct scope_config *model;

	model = devc->model_config;

	if (!probe_group)
		return PG_NONE;

	for (i = 0; i < model->analog_channels; ++i)
		if (probe_group == &devc->analog_groups[i])
			return PG_ANALOG;

	for (i = 0; i < model->digital_pods; ++i)
		if (probe_group == &devc->digital_groups[i])
			return PG_DIGITAL;

	sr_err("Invalid probe group specified.");

	return PG_INVALID;
}

static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi,
		      const struct sr_probe_group *probe_group)
{
	int ret, pg_type;
	unsigned int i;
	struct dev_context *devc;
	struct scope_config *model;

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

	if ((pg_type = check_probe_group(devc, probe_group)) == PG_INVALID)
		return SR_ERR;

	ret = SR_ERR_NA;
	model = devc->model_config;

	switch (key) {
	case SR_CONF_NUM_TIMEBASE:
		*data = g_variant_new_int32(model->num_xdivs);
		ret = SR_OK;
		break;
	case SR_CONF_NUM_VDIV:
		if (pg_type == PG_NONE) {
			sr_err("No probe group specified.");
			return SR_ERR_PROBE_GROUP;
		} else if (pg_type == PG_ANALOG) {
			for (i = 0; i < model->analog_channels; ++i) {
				if (probe_group != &devc->analog_groups[i])
					continue;
				*data = g_variant_new_int32(model->num_ydivs);
				ret = SR_OK;
				break;
			}

		} else {
			ret = SR_ERR_NA;
		}
		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_probe_group *probe_group)
{
	int ret, pg_type;
	unsigned int i, j;
	char command[MAX_COMMAND_SIZE];
	struct dev_context *devc;
	struct scope_config *model;
	struct scope_state *state;
	const char *tmp;
	uint64_t p, q, tmp_u64;
	double tmp_d;

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

	if ((pg_type = check_probe_group(devc, probe_group)) == PG_INVALID)
		return SR_ERR;

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

	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 (pg_type == PG_NONE) {
			sr_err("No probe group specified.");
			return SR_ERR_PROBE_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 (probe_group != &devc->analog_groups[j - 1])
					continue;
				state->analog_channels[j - 1].vdiv = (float) p / q;
				g_snprintf(command, sizeof(command),
					   (*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
					   j, state->analog_channels[j-1].vdiv);

				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 = (float) p / q;
			g_snprintf(command, sizeof(command),
				   (*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
				   state->timebase);

			ret = sr_scpi_send(sdi->conn, command);
			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 - 0.5) * state->timebase * model->num_xdivs;
		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
			   state->horiz_triggerpos);

		ret = sr_scpi_send(sdi->conn, command);
		break;
	case SR_CONF_TRIGGER_SLOPE:
		tmp_u64 = g_variant_get_uint64(data);

		if (tmp_u64 != 0 && tmp_u64 != 1)
			return SR_ERR;

		state->trigger_slope = tmp_u64;

		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
			   tmp_u64 ? "POS" : "NEG");

		ret = sr_scpi_send(sdi->conn, command);
		break;
	case SR_CONF_COUPLING:
		if (pg_type == PG_NONE) {
			sr_err("No probe group specified.");
			return SR_ERR_PROBE_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 (probe_group != &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);

	return ret;
}

static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
		       const struct sr_probe_group *probe_group)
{
	int pg_type;
	struct dev_context *devc;
	struct scope_config *model;

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

	if ((pg_type = check_probe_group(devc, probe_group)) == PG_INVALID)
		return SR_ERR;

	model = devc->model_config;

	switch (key) {
	case SR_CONF_DEVICE_OPTIONS:
		if (pg_type == PG_NONE) {
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
				model->hw_caps, model->num_hwcaps,
				sizeof(int32_t));
		} else if (pg_type == PG_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 (pg_type == PG_NONE)
			return SR_ERR_PROBE_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_TIMEBASE:
		*data = build_tuples(model->timebases, model->num_timebases);
		break;
	case SR_CONF_VDIV:
		if (pg_type == PG_NONE)
			return SR_ERR_PROBE_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_probe *probe;
	struct dev_context *devc;
	struct scope_config *model;

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

	probe = devc->current_probe->data;

	switch (probe->type) {
	case SR_PROBE_ANALOG:
		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
			   probe->index + 1);
		break;
	case SR_PROBE_LOGIC:
		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
			   probe->index < 8 ? 1 : 2);
		break;
	default:
		sr_err("Invalid probe type.");
		break;
	}

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

static int hmo_check_probes(GSList *probes)
{
	GSList *l;
	struct sr_probe *probe;
	gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;

	enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;

	for (l = probes; l; l = l->next) {
		probe = l->data;
		switch (probe->type) {
		case SR_PROBE_ANALOG:
			if (probe->index == 2)
				enabled_chan3 = TRUE;
			else if (probe->index == 3)
				enabled_chan4 = TRUE;
			break;
		case SR_PROBE_LOGIC:
			if (probe->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_probes(const struct sr_dev_inst *sdi)
{
	GSList *l;
	unsigned int i;
	gboolean *pod_enabled;
	char command[MAX_COMMAND_SIZE];
	struct scope_state *state;
	struct scope_config *model;
	struct sr_probe *probe;
	struct dev_context *devc;
	struct sr_scpi_dev_inst *scpi;

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

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

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

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

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

			if (sr_scpi_send(scpi, command) != SR_OK)
				return SR_ERR;

			state->digital_channels[probe->index] = probe->enabled;
			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];
	}

	g_free(pod_enabled);

	return SR_OK;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
{
	GSList *l;
	gboolean digital_added;
	struct sr_probe *probe;
	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->probes; l; l = l->next) {
		probe = l->data;
		if (!probe->enabled)
			continue;
		/* Only add a single digital probe. */
		if (probe->type != SR_PROBE_LOGIC || !digital_added) {
			devc->enabled_probes = g_slist_append(
					devc->enabled_probes, probe);
			if (probe->type == SR_PROBE_LOGIC)
				digital_added = TRUE;
		}
	}

	if (!devc->enabled_probes)
		return SR_ERR;

	if (hmo_check_probes(devc->enabled_probes) != SR_OK) {
		sr_err("Invalid probe configuration specified!");
		return SR_ERR_NA;
	}

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

	sr_scpi_source_add(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_probe = devc->enabled_probes;

	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;

	(void)cb_data;

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

	devc = sdi->priv;

	g_slist_free(devc->enabled_probes);
	devc->enabled_probes = NULL;
	scpi = sdi->conn;
	sr_scpi_source_remove(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 <glib/gstdio.h>
	22	#include "protocol.h"
	23
	24	#define SERIALCOMM "115200/8n1/flow=1"
	25
	26	static const int32_t hwopts[] = {
	27	SR_CONF_CONN,
	28	SR_CONF_SERIALCOMM,
	29	};
	30
	31	struct usb_id_info {
	32	uint16_t vendor_id;
	33	uint16_t product_id;
	34	};
	35
	36	static struct usb_id_info ho_models[] = {
	37	{ 0x0403, 0xed72 }, /* HO720 */
	38	{ 0x0403, 0xed73 }, /* HO730 */
	39	};
	40
	41	enum {
	42	PG_INVALID = -1,
	43	PG_NONE,
	44	PG_ANALOG,
	45	PG_DIGITAL,
	46	};
	47
	48	static int init(struct sr_context *sr_ctx)
	49	{
	50	return std_init(sr_ctx, di, LOG_PREFIX);
	51	}
	52
	53	/**
	54	* Find USB serial devices via the USB vendor ID and product ID.
	55	*
	56	* @param vendor_id Vendor ID of the USB device.
	57	* @param product_id Product ID of the USB device.
	58	*
	59	* @return A GSList of strings containing the path of the serial device or
	60	* NULL if no serial device is found. The returned list must be freed
	61	* by the caller.
	62	*/
	63	static GSList *auto_find_usb(uint16_t vendor_id, uint16_t product_id)
	64	{
	65	#ifdef __linux__
	66	const gchar *usb_dev;
	67	const char device_tree[] = "/sys/bus/usb/devices/";
	68	GDir devices_dir, device_dir;
	69	GSList *l = NULL;
	70	GSList *tty_devs;
	71	GSList *matched_paths;
	72	FILE *fd;
	73	char tmp[5];
	74	gchar vendor_path, product_path, *path_copy;
	75	gchar prefix, subdir_path, device_path, tty_path;
	76	unsigned long read_vendor_id, read_product_id;
	77	const char *file;
	78
	79	l = NULL;
	80	tty_devs = NULL;
	81	matched_paths = NULL;
	82
	83	if (!(devices_dir = g_dir_open(device_tree, 0, NULL)))
	84	return NULL;
	85
	86	/*
	87	* Find potential candidates using the vendor ID and product ID
	88	* and store them in matched_paths.
	89	*/
	90	while ((usb_dev = g_dir_read_name(devices_dir))) {
	91	vendor_path = g_strconcat(device_tree,
	92	usb_dev, "/idVendor", NULL);
	93	product_path = g_strconcat(device_tree,
	94	usb_dev, "/idProduct", NULL);
	95
	96	if (!g_file_test(vendor_path, G_FILE_TEST_EXISTS) \|\|
	97	!g_file_test(product_path, G_FILE_TEST_EXISTS))
	98	goto skip_device;
	99
	100	if ((fd = g_fopen(vendor_path, "r")) == NULL)
	101	goto skip_device;
	102
	103	if (fgets(tmp, sizeof(tmp), fd) == NULL) {
	104	fclose(fd);
	105	goto skip_device;
	106	}
	107	read_vendor_id = strtoul(tmp, NULL, 16);
	108
	109	fclose(fd);
	110
	111	if ((fd = g_fopen(product_path, "r")) == NULL)
	112	goto skip_device;
	113
	114	if (fgets(tmp, sizeof(tmp), fd) == NULL) {
	115	fclose(fd);
	116	goto skip_device;
	117	}
	118	read_product_id = strtoul(tmp, NULL, 16);
	119
	120	fclose(fd);
	121
	122	if (vendor_id == read_vendor_id &&
	123	product_id == read_product_id) {
	124	path_copy = g_strdup(usb_dev);
	125	matched_paths = g_slist_prepend(matched_paths,
	126	path_copy);
	127	}
	128
	129	skip_device:
	130	g_free(vendor_path);
	131	g_free(product_path);
	132	}
	133	g_dir_close(devices_dir);
	134
	135	/* For every matched device try to find a ttyUSBX subfolder. */
	136	for (l = matched_paths; l; l = l->next) {
	137	subdir_path = NULL;
	138
	139	device_path = g_strconcat(device_tree, l->data, NULL);
	140
	141	if (!(device_dir = g_dir_open(device_path, 0, NULL))) {
	142	g_free(device_path);
	143	continue;
	144	}
	145
	146	prefix = g_strconcat(l->data, ":", NULL);
	147
	148	while ((file = g_dir_read_name(device_dir))) {
	149	if (g_str_has_prefix(file, prefix)) {
	150	subdir_path = g_strconcat(device_path,
	151	"/", file, NULL);
	152	break;
	153	}
	154	}
	155	g_dir_close(device_dir);
	156
	157	g_free(prefix);
	158	g_free(device_path);
	159
	160	if (subdir_path) {
	161	if (!(device_dir = g_dir_open(subdir_path, 0, NULL))) {
	162	g_free(subdir_path);
	163	continue;
	164	}
	165	g_free(subdir_path);
	166
	167	while ((file = g_dir_read_name(device_dir))) {
	168	if (g_str_has_prefix(file, "ttyUSB")) {
	169	tty_path = g_strconcat("/dev/",
	170	file, NULL);
	171	sr_dbg("Found USB device %04x:%04x attached to %s.",
	172	vendor_id, product_id, tty_path);
	173	tty_devs = g_slist_prepend(tty_devs,
	174	tty_path);
	175	break;
	176	}
	177	}
	178	g_dir_close(device_dir);
	179	}
	180	}
	181	g_slist_free_full(matched_paths, g_free);
	182
	183	return tty_devs;
	184	#else
	185	return NULL;
	186	#endif
	187	}
	188
	189	static GSList scan(GSList options)
	190	{
	191	GSList *devices;
	192	struct drv_context *drvc;
	193	struct sr_dev_inst *sdi;
	194	const char serial_device, serial_options;
	195	GSList l, tty_devs;
	196	unsigned int i;
	197
	198	serial_device = NULL;
	199	serial_options = SERIALCOMM;
	200	sdi = NULL;
	201	devices = NULL;
	202	drvc = di->priv;
	203	drvc->instances = NULL;
	204
	205	if (sr_serial_extract_options(options, &serial_device,
	206	&serial_options) == SR_OK) {
	207	sdi = hmo_probe_serial_device(serial_device, serial_options);
	208	if (sdi != NULL) {
	209	devices = g_slist_append(devices, sdi);
	210	drvc->instances = g_slist_append(drvc->instances, sdi);
	211	}
	212	} else {
	213	tty_devs = NULL;
	214
	215	for (i = 0; i < ARRAY_SIZE(ho_models); i++) {
	216	if ((l = auto_find_usb(ho_models[i].vendor_id,
	217	ho_models[i].product_id)) == NULL)
	218	continue;
	219	tty_devs = g_slist_concat(tty_devs, l);
	220	}
	221
	222	for (l = tty_devs; l; l = l->next) {
	223	sdi = hmo_probe_serial_device(l->data, serial_options);
	224	if (sdi != NULL) {
	225	devices = g_slist_append(devices, sdi);
	226	drvc->instances = g_slist_append(drvc->instances, sdi);
	227	}
	228	}
	229
	230	g_slist_free_full(tty_devs, g_free);
	231	}
	232
	233	return devices;
	234	}
	235
	236	static GSList *dev_list(void)
	237	{
	238	return ((struct drv_context *)(di->priv))->instances;
	239	}
	240
	241	static void clear_helper(void *priv)
	242	{
	243	unsigned int i;
	244	struct dev_context *devc;
	245	struct scope_config *model;
	246
	247	devc = priv;
	248	model = devc->model_config;
	249
	250	hmo_scope_state_free(devc->model_state);
	251
	252	for (i = 0; i < model->analog_channels; ++i)
	253	g_slist_free(devc->analog_groups[i].probes);
	254
	255	for (i = 0; i < model->digital_pods; ++i) {
	256	g_slist_free(devc->digital_groups[i].probes);
	257	g_free(devc->digital_groups[i].name);
	258	}
	259
	260	g_free(devc->analog_groups);
	261	g_free(devc->digital_groups);
	262
	263	g_free(devc);
	264	}
	265
	266	static int dev_clear(void)
	267	{
	268	return std_dev_clear(di, clear_helper);
	269	}
	270
	271	static int dev_open(struct sr_dev_inst *sdi)
	272	{
	273	if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
	274	return SR_ERR;
	275
	276	if (hmo_scope_state_get(sdi) != SR_OK)
	277	return SR_ERR;
	278
	279	sdi->status = SR_ST_ACTIVE;
	280
	281	return SR_OK;
	282	}
	283
	284	static int dev_close(struct sr_dev_inst *sdi)
	285	{
	286	if (sdi->status == SR_ST_INACTIVE)
	287	return SR_OK;
	288
	289	sr_scpi_close(sdi->conn);
	290
	291	sdi->status = SR_ST_INACTIVE;
	292
	293	return SR_OK;
	294	}
	295
	296	static int cleanup(void)
	297	{
	298	dev_clear();
	299
	300	return SR_OK;
	301	}
	302
	303	static int check_probe_group(struct dev_context *devc,
	304	const struct sr_probe_group *probe_group)
	305	{
	306	unsigned int i;
	307	struct scope_config *model;
	308
	309	model = devc->model_config;
	310
	311	if (!probe_group)
	312	return PG_NONE;
	313
	314	for (i = 0; i < model->analog_channels; ++i)
	315	if (probe_group == &devc->analog_groups[i])
	316	return PG_ANALOG;
	317
	318	for (i = 0; i < model->digital_pods; ++i)
	319	if (probe_group == &devc->digital_groups[i])
	320	return PG_DIGITAL;
	321
	322	sr_err("Invalid probe group specified.");
	323
	324	return PG_INVALID;
	325	}
	326
	327	static int config_get(int key, GVariant *data, const struct sr_dev_inst sdi,
	328	const struct sr_probe_group *probe_group)
	329	{
	330	int ret, pg_type;
	331	unsigned int i;
	332	struct dev_context *devc;
	333	struct scope_config *model;
	334
	335	if (!sdi \|\| !(devc = sdi->priv))
	336	return SR_ERR_ARG;
	337
	338	if ((pg_type = check_probe_group(devc, probe_group)) == PG_INVALID)
	339	return SR_ERR;
	340
	341	ret = SR_ERR_NA;
	342	model = devc->model_config;
	343
	344	switch (key) {
	345	case SR_CONF_NUM_TIMEBASE:
	346	*data = g_variant_new_int32(model->num_xdivs);
	347	ret = SR_OK;
	348	break;
	349	case SR_CONF_NUM_VDIV:
	350	if (pg_type == PG_NONE) {
	351	sr_err("No probe group specified.");
	352	return SR_ERR_PROBE_GROUP;
	353	} else if (pg_type == PG_ANALOG) {
	354	for (i = 0; i < model->analog_channels; ++i) {
	355	if (probe_group != &devc->analog_groups[i])
	356	continue;
	357	*data = g_variant_new_int32(model->num_ydivs);
	358	ret = SR_OK;
	359	break;
	360	}
	361
	362	} else {
	363	ret = SR_ERR_NA;
	364	}
	365	break;
	366	default:
	367	ret = SR_ERR_NA;
	368	}
	369
	370	return ret;
	371	}
	372
	373	static GVariant build_tuples(const uint64_t (array)[][2], unsigned int n)
	374	{
	375	unsigned int i;
	376	GVariant *rational[2];
	377	GVariantBuilder gvb;
	378
	379	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
	380
	381	for (i = 0; i < n; i++) {
	382	rational[0] = g_variant_new_uint64((*array)[i][0]);
	383	rational[1] = g_variant_new_uint64((*array)[i][1]);
	384
	385	/* FIXME: Valgrind reports a memory leak here. */
	386	g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
	387	}
	388
	389	return g_variant_builder_end(&gvb);
	390	}
	391
	392	static int config_set(int key, GVariant data, const struct sr_dev_inst sdi,
	393	const struct sr_probe_group *probe_group)
	394	{
	395	int ret, pg_type;
	396	unsigned int i, j;
	397	char command[MAX_COMMAND_SIZE];
	398	struct dev_context *devc;
	399	struct scope_config *model;
	400	struct scope_state *state;
	401	const char *tmp;
	402	uint64_t p, q, tmp_u64;
	403	double tmp_d;
	404
	405	if (!sdi \|\| !(devc = sdi->priv))
	406	return SR_ERR_ARG;
	407
	408	if ((pg_type = check_probe_group(devc, probe_group)) == PG_INVALID)
	409	return SR_ERR;
	410
	411	model = devc->model_config;
	412	state = devc->model_state;
	413
	414	ret = SR_ERR_NA;
	415
	416	switch (key) {
	417	case SR_CONF_LIMIT_FRAMES:
	418	devc->frame_limit = g_variant_get_uint64(data);
	419	ret = SR_OK;
	420	break;
	421	case SR_CONF_TRIGGER_SOURCE:
	422	tmp = g_variant_get_string(data, NULL);
	423	for (i = 0; (*model->trigger_sources)[i]; i++) {
	424	if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
	425	continue;
	426	state->trigger_source = i;
	427	g_snprintf(command, sizeof(command),
	428	(*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
	429	(*model->trigger_sources)[i]);
	430
	431	ret = sr_scpi_send(sdi->conn, command);
	432	break;
	433	}
	434	break;
	435	case SR_CONF_VDIV:
	436	if (pg_type == PG_NONE) {
	437	sr_err("No probe group specified.");
	438	return SR_ERR_PROBE_GROUP;
	439	}
	440
	441	g_variant_get(data, "(tt)", &p, &q);
	442
	443	for (i = 0; i < model->num_vdivs; i++) {
	444	if (p != (*model->vdivs)[i][0] \|\|
	445	q != (*model->vdivs)[i][1])
	446	continue;
	447	for (j = 1; j <= model->analog_channels; ++j) {
	448	if (probe_group != &devc->analog_groups[j - 1])
	449	continue;
	450	state->analog_channels[j - 1].vdiv = (float) p / q;
	451	g_snprintf(command, sizeof(command),
	452	(*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
	453	j, state->analog_channels[j-1].vdiv);
	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
	459	break;
	460	}
	461
	462	ret = SR_OK;
	463	break;
	464	}
	465	break;
	466	case SR_CONF_TIMEBASE:
	467	g_variant_get(data, "(tt)", &p, &q);
	468
	469	for (i = 0; i < model->num_timebases; i++) {
	470	if (p != (*model->timebases)[i][0] \|\|
	471	q != (*model->timebases)[i][1])
	472	continue;
	473	state->timebase = (float) p / q;
	474	g_snprintf(command, sizeof(command),
	475	(*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
	476	state->timebase);
	477
	478	ret = sr_scpi_send(sdi->conn, command);
	479	break;
	480	}
	481	break;
	482	case SR_CONF_HORIZ_TRIGGERPOS:
	483	tmp_d = g_variant_get_double(data);
	484
	485	if (tmp_d < 0.0 \|\| tmp_d > 1.0)
	486	return SR_ERR;
	487
	488	state->horiz_triggerpos = -(tmp_d - 0.5) * state->timebase * model->num_xdivs;
	489	g_snprintf(command, sizeof(command),
	490	(*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
	491	state->horiz_triggerpos);
	492
	493	ret = sr_scpi_send(sdi->conn, command);
	494	break;
	495	case SR_CONF_TRIGGER_SLOPE:
	496	tmp_u64 = g_variant_get_uint64(data);
	497
	498	if (tmp_u64 != 0 && tmp_u64 != 1)
	499	return SR_ERR;
	500
	501	state->trigger_slope = tmp_u64;
	502
	503	g_snprintf(command, sizeof(command),
	504	(*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
	505	tmp_u64 ? "POS" : "NEG");
	506
	507	ret = sr_scpi_send(sdi->conn, command);
	508	break;
	509	case SR_CONF_COUPLING:
	510	if (pg_type == PG_NONE) {
	511	sr_err("No probe group specified.");
	512	return SR_ERR_PROBE_GROUP;
	513	}
	514
	515	tmp = g_variant_get_string(data, NULL);
	516
	517	for (i = 0; (*model->coupling_options)[i]; i++) {
	518	if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
	519	continue;
	520	for (j = 1; j <= model->analog_channels; ++j) {
	521	if (probe_group != &devc->analog_groups[j - 1])
	522	continue;
	523	state->analog_channels[j-1].coupling = i;
	524
	525	g_snprintf(command, sizeof(command),
	526	(*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
	527	j, tmp);
	528
	529	if (sr_scpi_send(sdi->conn, command) != SR_OK \|\|
	530	sr_scpi_get_opc(sdi->conn) != SR_OK)
	531	return SR_ERR;
	532	break;
	533	}
	534
	535	ret = SR_OK;
	536	break;
	537	}
	538	break;
	539	default:
	540	ret = SR_ERR_NA;
	541	break;
	542	}
	543
	544	if (ret == SR_OK)
	545	ret = sr_scpi_get_opc(sdi->conn);
	546
	547	return ret;
	548	}
	549
	550	static int config_list(int key, GVariant *data, const struct sr_dev_inst sdi,
	551	const struct sr_probe_group *probe_group)
	552	{
	553	int pg_type;
	554	struct dev_context *devc;
	555	struct scope_config *model;
	556
	557	if (!sdi \|\| !(devc = sdi->priv))
	558	return SR_ERR_ARG;
	559
	560	if ((pg_type = check_probe_group(devc, probe_group)) == PG_INVALID)
	561	return SR_ERR;
	562
	563	model = devc->model_config;
	564
	565	switch (key) {
	566	case SR_CONF_DEVICE_OPTIONS:
	567	if (pg_type == PG_NONE) {
	568	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	569	model->hw_caps, model->num_hwcaps,
	570	sizeof(int32_t));
	571	} else if (pg_type == PG_ANALOG) {
	572	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	573	model->analog_hwcaps, model->num_analog_hwcaps,
	574	sizeof(int32_t));
	575	} else {
	576	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	577	NULL, 0, sizeof(int32_t));
	578	}
	579	break;
	580	case SR_CONF_COUPLING:
	581	if (pg_type == PG_NONE)
	582	return SR_ERR_PROBE_GROUP;
	583	data = g_variant_new_strv(model->coupling_options,
	584	g_strv_length((char *)model->coupling_options));
	585	break;
	586	case SR_CONF_TRIGGER_SOURCE:
	587	data = g_variant_new_strv(model->trigger_sources,
	588	g_strv_length((char *)model->trigger_sources));
	589	break;
	590	case SR_CONF_TIMEBASE:
	591	*data = build_tuples(model->timebases, model->num_timebases);
	592	break;
	593	case SR_CONF_VDIV:
	594	if (pg_type == PG_NONE)
	595	return SR_ERR_PROBE_GROUP;
	596	*data = build_tuples(model->vdivs, model->num_vdivs);
	597	break;
	598	default:
	599	return SR_ERR_NA;
	600	}
	601
	602	return SR_OK;
	603	}
	604
	605	SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
	606	{
	607	char command[MAX_COMMAND_SIZE];
	608	struct sr_probe *probe;
	609	struct dev_context *devc;
	610	struct scope_config *model;
	611
	612	devc = sdi->priv;
	613	model = devc->model_config;
	614
	615	probe = devc->current_probe->data;
	616
	617	switch (probe->type) {
	618	case SR_PROBE_ANALOG:
	619	g_snprintf(command, sizeof(command),
	620	(*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
	621	probe->index + 1);
	622	break;
	623	case SR_PROBE_LOGIC:
	624	g_snprintf(command, sizeof(command),
	625	(*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
	626	probe->index < 8 ? 1 : 2);
	627	break;
	628	default:
	629	sr_err("Invalid probe type.");
	630	break;
	631	}
	632
	633	return sr_scpi_send(sdi->conn, command);
	634	}
	635
	636	static int hmo_check_probes(GSList *probes)
	637	{
	638	GSList *l;
	639	struct sr_probe *probe;
	640	gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
	641
	642	enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
	643
	644	for (l = probes; l; l = l->next) {
	645	probe = l->data;
	646	switch (probe->type) {
	647	case SR_PROBE_ANALOG:
	648	if (probe->index == 2)
	649	enabled_chan3 = TRUE;
	650	else if (probe->index == 3)
	651	enabled_chan4 = TRUE;
	652	break;
	653	case SR_PROBE_LOGIC:
	654	if (probe->index < 8)
	655	enabled_pod1 = TRUE;
	656	else
	657	enabled_pod2 = TRUE;
	658	break;
	659	default:
	660	return SR_ERR;
	661	}
	662	}
	663
	664	if ((enabled_pod1 && enabled_chan3) \|\|
	665	(enabled_pod2 && enabled_chan4))
	666	return SR_ERR;
	667
	668	return SR_OK;
	669	}
	670
	671	static int hmo_setup_probes(const struct sr_dev_inst *sdi)
	672	{
	673	GSList *l;
	674	unsigned int i;
	675	gboolean *pod_enabled;
	676	char command[MAX_COMMAND_SIZE];
	677	struct scope_state *state;
	678	struct scope_config *model;
	679	struct sr_probe *probe;
	680	struct dev_context *devc;
	681	struct sr_scpi_dev_inst *scpi;
	682
	683	devc = sdi->priv;
	684	scpi = sdi->conn;
	685	state = devc->model_state;
	686	model = devc->model_config;
	687
	688	pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
	689
	690	for (l = sdi->probes; l; l = l->next) {
	691	probe = l->data;
	692	switch (probe->type) {
	693	case SR_PROBE_ANALOG:
	694	if (probe->enabled == state->analog_channels[probe->index].state)
	695	break;
	696	g_snprintf(command, sizeof(command),
	697	(*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
	698	probe->index + 1, probe->enabled);
	699
	700	if (sr_scpi_send(scpi, command) != SR_OK)
	701	return SR_ERR;
	702	state->analog_channels[probe->index].state = probe->enabled;
	703	break;
	704	case SR_PROBE_LOGIC:
	705	/*
	706	* A digital POD needs to be enabled for every group of
	707	* 8 probes.
	708	*/
	709	if (probe->enabled)
	710	pod_enabled[probe->index < 8 ? 0 : 1] = TRUE;
	711
	712	if (probe->enabled == state->digital_channels[probe->index])
	713	break;
	714	g_snprintf(command, sizeof(command),
	715	(*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
	716	probe->index, probe->enabled);
	717
	718	if (sr_scpi_send(scpi, command) != SR_OK)
	719	return SR_ERR;
	720
	721	state->digital_channels[probe->index] = probe->enabled;
	722	break;
	723	default:
	724	return SR_ERR;
	725	}
	726	}
	727
	728	for (i = 1; i <= model->digital_pods; ++i) {
	729	if (state->digital_pods[i - 1] == pod_enabled[i - 1])
	730	continue;
	731	g_snprintf(command, sizeof(command),
	732	(*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
	733	i, pod_enabled[i - 1]);
	734	if (sr_scpi_send(scpi, command) != SR_OK)
	735	return SR_ERR;
	736	state->digital_pods[i - 1] = pod_enabled[i - 1];
	737	}
	738
	739	g_free(pod_enabled);
	740
	741	return SR_OK;
	742	}
	743
	744	static int dev_acquisition_start(const struct sr_dev_inst sdi, void cb_data)
	745	{
	746	GSList *l;
	747	gboolean digital_added;
	748	struct sr_probe *probe;
	749	struct dev_context *devc;
	750	struct sr_scpi_dev_inst *scpi;
	751
	752	if (sdi->status != SR_ST_ACTIVE)
	753	return SR_ERR_DEV_CLOSED;
	754
	755	scpi = sdi->conn;
	756	devc = sdi->priv;
	757	digital_added = FALSE;
	758
	759	for (l = sdi->probes; l; l = l->next) {
	760	probe = l->data;
	761	if (!probe->enabled)
	762	continue;
	763	/* Only add a single digital probe. */
	764	if (probe->type != SR_PROBE_LOGIC \|\| !digital_added) {
	765	devc->enabled_probes = g_slist_append(
	766	devc->enabled_probes, probe);
	767	if (probe->type == SR_PROBE_LOGIC)
	768	digital_added = TRUE;
	769	}
	770	}
	771
	772	if (!devc->enabled_probes)
	773	return SR_ERR;
	774
	775	if (hmo_check_probes(devc->enabled_probes) != SR_OK) {
	776	sr_err("Invalid probe configuration specified!");
	777	return SR_ERR_NA;
	778	}
	779
	780	if (hmo_setup_probes(sdi) != SR_OK) {
	781	sr_err("Failed to setup probe configuration!");
	782	return SR_ERR;
	783	}
	784
	785	sr_scpi_source_add(scpi, G_IO_IN, 50, hmo_receive_data, (void *)sdi);
	786
	787	/* Send header packet to the session bus. */
	788	std_session_send_df_header(cb_data, LOG_PREFIX);
	789
	790	devc->current_probe = devc->enabled_probes;
	791
	792	return hmo_request_data(sdi);
	793	}
	794
	795	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	796	{
	797	struct dev_context *devc;
	798	struct sr_scpi_dev_inst *scpi;
	799
	800	(void)cb_data;
	801
	802	if (sdi->status != SR_ST_ACTIVE)
	803	return SR_ERR_DEV_CLOSED;
	804
	805	devc = sdi->priv;
	806
	807	g_slist_free(devc->enabled_probes);
	808	devc->enabled_probes = NULL;
	809	scpi = sdi->conn;
	810	sr_scpi_source_remove(scpi);
	811
	812	return SR_OK;
	813	}
	814
	815	SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
	816	.name = "hameg-hmo",
	817	.longname = "Hameg HMO",
	818	.api_version = 1,
	819	.init = init,
	820	.cleanup = cleanup,
	821	.scan = scan,
	822	.dev_list = dev_list,
	823	.dev_clear = dev_clear,
	824	.config_get = config_get,
	825	.config_set = config_set,
	826	.config_list = config_list,
	827	.dev_open = dev_open,
	828	.dev_close = dev_close,
	829	.dev_acquisition_start = dev_acquisition_start,
	830	.dev_acquisition_stop = dev_acquisition_stop,
	831	.priv = NULL,
	832	};