From: Sven Schnelle <redacted>
Date: Sun, 12 Feb 2017 19:18:16 +0000 (+0100)
Subject: lecroy-xstream: Add the actual driver implementation
X-Git-Tag: libsigrok-0.5.0~111
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=3f2c7c94a1333a0b30f8461b4f6c0069bbcbecdd;p=libsigrok.git

lecroy-xstream: Add the actual driver implementation

Signed-off-by: Sven Schnelle <redacted>
---

diff --git a/src/hardware/lecroy-xstream/api.c b/src/hardware/lecroy-xstream/api.c
index 6d11f3a6..43b2fcfb 100644
--- a/src/hardware/lecroy-xstream/api.c
+++ b/src/hardware/lecroy-xstream/api.c
@@ -18,37 +18,110 @@
  */
 
 #include <config.h>
+#include <stdlib.h>
+#include "scpi.h"
 #include "protocol.h"
 
-SR_PRIV struct sr_dev_driver lecroy_xstream_driver_info;
+static struct sr_dev_driver lecroy_xstream_driver_info;
+
+static const char *manufacturers[] = {
+	"LECROY",
+};
+
+static const uint32_t scanopts[] = {
+	SR_CONF_CONN,
+};
+
+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 *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;
+
+	sr_scpi_send(scpi, "COMM_HEADER OFF,WORD,BIN");
+	if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
+		sr_info("Couldn't get IDN response.");
+		goto fail;
+	}
+
+	if (check_manufacturer(hw_info->manufacturer) != SR_OK)
+		goto fail;
+
+	sdi = g_malloc0(sizeof(struct sr_dev_inst));
+	sdi->vendor = g_strdup(hw_info->manufacturer);
+	sdi->model = g_strdup(hw_info->model);
+	sdi->version = g_strdup(hw_info->firmware_version);
+	sdi->serial_num = g_strdup(hw_info->serial_number);
+	sdi->driver = &lecroy_xstream_driver_info;
+	sdi->inst_type = SR_INST_SCPI;
+	sdi->conn = scpi;
+
+	sr_scpi_hw_info_free(hw_info);
+	hw_info = NULL;
+
+	devc = g_malloc0(sizeof(struct dev_context));
+
+	sdi->priv = devc;
+
+	if (lecroy_xstream_init_device(sdi) != SR_OK)
+		goto fail;
+
+	return sdi;
+
+fail:
+	sr_scpi_hw_info_free(hw_info);
+	if (sdi)
+		sr_dev_inst_free(sdi);
+	g_free(devc);
+
+	return NULL;
+}
 
 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 {
-	struct drv_context *drvc;
-	GSList *devices;
+	return sr_scpi_scan(di->context, options, probe_serial_device);
+}
+
+static void clear_helper(void *priv)
+{
+	struct dev_context *devc;
 
-	(void)options;
+	devc = priv;
 
-	devices = NULL;
-	drvc = di->context;
-	drvc->instances = NULL;
+	lecroy_xstream_state_free(devc->model_state);
 
-	/* TODO: scan for devices, either based on a SR_CONF_CONN option
-	 * or on a USB scan. */
+	g_free(devc->analog_groups);
 
-	return devices;
+	g_free(devc);
 }
 
 static int dev_clear(const struct sr_dev_driver *di)
 {
-	return std_dev_clear(di, NULL);
+	return std_dev_clear(di, clear_helper);
 }
 
 static int dev_open(struct sr_dev_inst *sdi)
 {
-	(void)sdi;
+	if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
+		return SR_ERR;
 
-	/* TODO: get handle from sdi->conn and open it. */
+	if (lecroy_xstream_state_get(sdi) != SR_OK)
+		return SR_ERR;
 
 	sdi->status = SR_ST_ACTIVE;
 
@@ -57,9 +130,10 @@ static int dev_open(struct sr_dev_inst *sdi)
 
 static int dev_close(struct sr_dev_inst *sdi)
 {
-	(void)sdi;
+	if (sdi->status == SR_ST_INACTIVE)
+		return SR_OK;
 
-	/* TODO: get handle from sdi->conn and close it. */
+	sr_scpi_close(sdi->conn);
 
 	sdi->status = SR_ST_INACTIVE;
 
@@ -67,88 +141,469 @@ static int dev_close(struct sr_dev_inst *sdi)
 }
 
 static int config_get(uint32_t key, GVariant **data,
-	const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
+			const struct sr_dev_inst *sdi,
+			const struct sr_channel_group *cg)
 {
 	int ret;
+	unsigned int i;
+	struct dev_context *devc;
+	const struct scope_config *model;
+	struct scope_state *state;
 
-	(void)sdi;
-	(void)data;
-	(void)cg;
+	if (!sdi)
+		return SR_ERR_ARG;
+
+	devc = sdi->priv;
 
-	ret = SR_OK;
+	ret = SR_ERR_NA;
+	model = devc->model_config;
+	state = devc->model_state;
+	*data = NULL;
 	switch (key) {
-	/* TODO */
+	case SR_CONF_NUM_HDIV:
+		*data = g_variant_new_int32(model->num_xdivs);
+		ret = SR_OK;
+		break;
+	case SR_CONF_TIMEBASE:
+		*data = g_variant_new("(tt)",
+					model->timebases[state->timebase].p,
+					model->timebases[state->timebase].q);
+		ret = SR_OK;
+		break;
+	case SR_CONF_NUM_VDIV:
+		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;
+	case SR_CONF_VDIV:
+		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].p,
+				      model->vdivs[state->analog_channels[i].vdiv].q);
+			ret = SR_OK;
+		}
+		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:
+
+		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;
+	case SR_CONF_SAMPLERATE:
+		*data = g_variant_new_uint64(state->sample_rate);
+		ret = SR_OK;
+		break;
+	case SR_CONF_ENABLED:
+		*data = g_variant_new_boolean(FALSE);
+		ret = SR_OK;
+		break;
 	default:
-		return SR_ERR_NA;
+		ret = SR_ERR_NA;
 	}
-
 	return ret;
 }
 
-static int config_set(uint32_t key, GVariant *data,
-	const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
+static GVariant *build_tuples(const struct sr_rational *array, 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].p);
+		rational[1] = g_variant_new_uint64(array[i].q);
+
+		/* 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;
+	unsigned int i, j;
+	char command[MAX_COMMAND_SIZE];
+	struct dev_context *devc;
+	const struct scope_config *model;
+	struct scope_state *state;
+	const char *tmp;
+	int64_t p;
+	uint64_t q;
+	double tmp_d;
+	gboolean update_sample_rate;
 
-	(void)data;
-	(void)cg;
+	if (!sdi)
+		return SR_ERR_ARG;
 
-	if (sdi->status != SR_ST_ACTIVE)
-		return SR_ERR_DEV_CLOSED;
+	devc = sdi->priv;
+
+	model = devc->model_config;
+	state = devc->model_state;
+	update_sample_rate = FALSE;
+
+	ret = SR_ERR_NA;
 
-	ret = SR_OK;
 	switch (key) {
-	/* TODO */
+	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),
+					"SET TRIGGER SOURCE %s",
+					(*model->trigger_sources)[i]);
+
+			ret = sr_scpi_send(sdi->conn, command);
+			break;
+		}
+		break;
+	case SR_CONF_VDIV:
+		g_variant_get(data, "(tt)", &p, &q);
+
+		for (i = 0; i < model->num_vdivs; i++) {
+			if (p != model->vdivs[i].p || q != model->vdivs[i].q)
+				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_snprintf(command, sizeof(command),
+						"C%d:VDIV %E", j, (float)p/q);
+
+				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].p ||
+			    q != model->timebases[i].q)
+				continue;
+			state->timebase = i;
+			g_snprintf(command, sizeof(command),
+					"TIME_DIV %E", (float)p/q);
+
+			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].p /
+			 model->timebases[state->timebase].q)
+			 * model->num_xdivs;
+
+		g_snprintf(command, sizeof(command), "TRIG POS %e S", tmp_d);
+
+		ret = sr_scpi_send(sdi->conn, command);
+		break;
+	case SR_CONF_TRIGGER_SLOPE:
+		tmp = g_variant_get_string(data, NULL);
+		for (i = 0; (*model->trigger_slopes)[i]; i++) {
+			if (g_strcmp0(tmp, (*model->trigger_slopes)[i]) != 0)
+				continue;
+			state->trigger_slope = i;
+			g_snprintf(command, sizeof(command),
+					"SET TRIGGER SLOPE %s",
+					(*model->trigger_slopes)[i]);
+
+			ret = sr_scpi_send(sdi->conn, command);
+			break;
+		}
+		break;
+	case SR_CONF_COUPLING:
+
+		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),
+						"C%d:COUPLING %s", 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 = lecroy_xstream_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)
+static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
+		       const struct sr_channel_group *cg)
 {
-	int ret;
-
-	(void)sdi;
-	(void)data;
+	struct dev_context *devc = NULL;
+	const struct scope_config *model = NULL;
 	(void)cg;
 
-	ret = SR_OK;
+	if (sdi) {
+		devc = sdi->priv;
+		model = devc->model_config;
+	}
+
 	switch (key) {
-	/* TODO */
+	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) {
+			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
+							  model->devopts,
+							  model->num_devopts,
+							  sizeof(uint32_t));
+			break;
+		}
+		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
+						  model->analog_devopts,
+						  model->num_analog_devopts,
+						  sizeof(uint32_t));
+		break;
+	case SR_CONF_COUPLING:
+		*data = g_variant_new_strv(*model->coupling_options,
+			   g_strv_length((char **)*model->coupling_options));
+		break;
+	case SR_CONF_TRIGGER_SOURCE:
+		if (!model)
+			return SR_ERR_ARG;
+		*data = g_variant_new_strv(*model->trigger_sources,
+			   g_strv_length((char **)*model->trigger_sources));
+		break;
+	case SR_CONF_TRIGGER_SLOPE:
+		if (!model)
+			return SR_ERR_ARG;
+		*data = g_variant_new_strv(*model->trigger_slopes,
+			   g_strv_length((char **)*model->trigger_slopes));
+		break;
+	case SR_CONF_TIMEBASE:
+		if (!model)
+			return SR_ERR_ARG;
+		*data = build_tuples(model->timebases, model->num_timebases);
+		break;
+	case SR_CONF_VDIV:
+		if (!model)
+			return SR_ERR_ARG;
+		*data = build_tuples(model->vdivs, model->num_vdivs);
+		break;
 	default:
 		return SR_ERR_NA;
 	}
+	return SR_OK;
+}
 
-	return ret;
+SR_PRIV int lecroy_xstream_request_data(const struct sr_dev_inst *sdi)
+{
+	char command[MAX_COMMAND_SIZE];
+	struct sr_channel *ch;
+	struct dev_context *devc;
+
+	devc = sdi->priv;
+
+	ch = devc->current_channel->data;
+
+	if (ch->type != SR_CHANNEL_ANALOG)
+		return SR_ERR;
+
+	g_snprintf(command, sizeof(command),
+			"COMM_FORMAT DEF9,WORD,BIN;C%d:WAVEFORM?", ch->index+1);
+	return sr_scpi_send(sdi->conn, command);
+}
+
+static int lecroy_setup_channels(const struct sr_dev_inst *sdi)
+{
+	GSList *l;
+	gboolean setup_changed;
+	char command[MAX_COMMAND_SIZE];
+	struct scope_state *state;
+	struct sr_channel *ch;
+	struct dev_context *devc;
+	struct sr_scpi_dev_inst *scpi;
+
+	devc = sdi->priv;
+	scpi = sdi->conn;
+	state = devc->model_state;
+	setup_changed = FALSE;
+
+	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), "C%d:TRACE %s",
+				   ch->index+1, ch->enabled ? "ON" : "OFF");
+
+			if (sr_scpi_send(scpi, command) != SR_OK)
+				return SR_ERR;
+			state->analog_channels[ch->index].state = ch->enabled;
+			setup_changed = TRUE;
+			break;
+		default:
+			return SR_ERR;
+		}
+	}
+
+	if (setup_changed && lecroy_xstream_update_sample_rate(sdi) != SR_OK)
+		return SR_ERR;
+
+	return SR_OK;
 }
 
 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 {
+	GSList *l;
+	struct sr_channel *ch;
+	struct dev_context *devc;
+	int ret;
+	struct sr_scpi_dev_inst *scpi;
+
 	if (sdi->status != SR_ST_ACTIVE)
 		return SR_ERR_DEV_CLOSED;
 
-	/* TODO: configure hardware, reset acquisition state, set up
-	 * callbacks and send header packet. */
+	devc = sdi->priv;
+	scpi = sdi->conn;
+	/* Preset empty results. */
+	g_slist_free(devc->enabled_channels);
+	devc->enabled_channels = NULL;
+
+	/*
+	 * Contruct the list of enabled channels. Determine the highest
+	 * number of digital pods involved in the acquisition.
+	 */
+
+	for (l = sdi->channels; l; l = l->next) {
+		ch = l->data;
+		if (!ch->enabled)
+			continue;
+		/* Only add a single digital channel per group (pod). */
+		devc->enabled_channels = g_slist_append(
+			devc->enabled_channels, ch);
+	}
 
-	return SR_OK;
+	if (!devc->enabled_channels)
+		return SR_ERR;
+
+	/*
+	 * Configure the analog channels and the
+	 * corresponding digital pods.
+	 */
+	if (lecroy_setup_channels(sdi) != SR_OK) {
+		sr_err("Failed to setup channel configuration!");
+		ret = SR_ERR;
+		goto free_enabled;
+	}
+
+	/*
+	 * Start acquisition on the first enabled channel. The
+	 * receive routine will continue driving the acquisition.
+	 */
+	sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
+			lecroy_xstream_receive_data, (void *)sdi);
+
+	std_session_send_df_header(sdi);
+
+	devc->current_channel = devc->enabled_channels;
+
+	return lecroy_xstream_request_data(sdi);
+
+free_enabled:
+	g_slist_free(devc->enabled_channels);
+	devc->enabled_channels = NULL;
+	return ret;
 }
 
 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 {
+	struct dev_context *devc;
+	struct sr_scpi_dev_inst *scpi;
+
+	std_session_send_df_end(sdi);
+
 	if (sdi->status != SR_ST_ACTIVE)
 		return SR_ERR_DEV_CLOSED;
 
-	/* TODO: stop acquisition. */
+	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 lecroy_xstream_driver_info = {
+static struct sr_dev_driver lecroy_xstream_driver_info = {
 	.name = "lecroy-xstream",
-	.longname = "lecroy-xstream",
+	.longname = "LeCroy Xstream based scopes",
 	.api_version = 1,
 	.init = std_init,
 	.cleanup = std_cleanup,
@@ -164,5 +619,4 @@ SR_PRIV struct sr_dev_driver lecroy_xstream_driver_info = {
 	.dev_acquisition_stop = dev_acquisition_stop,
 	.context = NULL,
 };
-
 SR_REGISTER_DEV_DRIVER(lecroy_xstream_driver_info);
diff --git a/src/hardware/lecroy-xstream/protocol.c b/src/hardware/lecroy-xstream/protocol.c
index dbf045bf..e3152623 100644
--- a/src/hardware/lecroy-xstream/protocol.c
+++ b/src/hardware/lecroy-xstream/protocol.c
@@ -18,14 +18,607 @@
  */
 
 #include <config.h>
+#include <math.h>
+#include <stdlib.h>
+#include "scpi.h"
 #include "protocol.h"
 
-SR_PRIV int lecroy_xstream_receive_data(int fd, int revents, void *cb_data)
+SR_PRIV void lecroy_queue_logic_data(struct dev_context *devc,
+				  size_t group, GByteArray *pod_data);
+SR_PRIV void lecroy_send_logic_packet(struct sr_dev_inst *sdi,
+				   struct dev_context *devc);
+SR_PRIV void lecroy_cleanup_logic_data(struct dev_context *devc);
+
+struct lecroy_wavedesc_2_x {
+	uint16_t comm_type;
+	uint16_t comm_order; /* 1 - little endian */
+	uint32_t wave_descriptor_length;
+	uint32_t user_text_len;
+	uint32_t res_desc1;
+	uint32_t trigtime_array_length;
+	uint32_t ris_time1_array_length;
+	uint32_t res_array1;
+	uint32_t wave_array1_length;
+	uint32_t wave_array2_length;
+	uint32_t wave_array3_length;
+	uint32_t wave_array4_length;
+	char instrument_name[16];
+	uint32_t instrument_number;
+	char trace_label[16];
+	uint32_t reserved;
+	uint32_t wave_array_count;
+	uint32_t points_per_screen;
+	uint32_t first_valid_point;
+	uint32_t last_valid_point;
+	uint32_t first_point;
+	uint32_t sparsing_factor;
+	uint32_t segment_index;
+	uint32_t subarray_count;
+	uint32_t sweeps_per_acq;
+	uint16_t points_per_pair;
+	uint16_t pair_offset;
+	float vertical_gain;
+	float vertical_offset;
+	float max_value;
+	float min_value;
+	uint16_t nominal_bits;
+	uint16_t nom_subarray_count;
+	float horiz_interval;
+	double horiz_offset;
+	double pixel_offset;
+	char vertunit[48];
+	char horunit[48];
+	uint32_t reserved1;
+	double trigger_time;
+} __attribute__((packed));
+
+struct lecroy_wavedesc {
+	char descriptor_name[16];
+	char template_name[16];
+	union {
+		struct lecroy_wavedesc_2_x version_2_x;
+	};
+} __attribute__((packed));
+
+static const uint32_t lecroy_devopts[] = {
+	SR_CONF_OSCILLOSCOPE,
+	SR_CONF_LIMIT_FRAMES | SR_CONF_GET | SR_CONF_SET,
+	SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
+	SR_CONF_TIMEBASE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
+	SR_CONF_NUM_HDIV | SR_CONF_GET,
+	SR_CONF_TRIGGER_SLOPE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
+	SR_CONF_HORIZ_TRIGGERPOS | SR_CONF_GET | SR_CONF_SET,
+	SR_CONF_SAMPLERATE | SR_CONF_GET,
+};
+
+static const uint32_t lecroy_analog_devopts[] = {
+	SR_CONF_NUM_VDIV | SR_CONF_GET,
+	SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
+	SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
+};
+
+static const char *lecroy_coupling_options[] = {
+	"A1M", // AC with 1 MOhm termination
+	"D50",  // DC with 50 Ohm termination
+	"D1M", // DC with 1 MOhm termination
+	"GND",
+	"OVL",
+	NULL,
+};
+
+static const char *scope_trigger_slopes[] = {
+	"POS",
+	"NEG",
+	NULL,
+};
+
+static const char *lecroy_xstream_trigger_sources[] = {
+	"C1",
+	"C2",
+	"C3",
+	"C4",
+	"LINE",
+	"EXT",
+	NULL,
+};
+
+static const struct sr_rational lecroy_timebases[] = {
+	/* picoseconds */
+	{ 20, 1000000000000 },
+	{ 50, 1000000000000 },
+	{ 100, 1000000000000 },
+	{ 200, 1000000000000 },
+	{ 500, 1000000000000 },
+	/* nanoseconds */
+	{ 1, 1000000000 },
+	{ 2, 1000000000 },
+	{ 5, 1000000000 },
+	{ 10, 1000000000 },
+	{ 20, 1000000000 },
+	{ 50, 1000000000 },
+	{ 100, 1000000000 },
+	{ 200, 1000000000 },
+	{ 500, 1000000000 },
+	/* microseconds */
+	{ 1, 1000000 },
+	{ 2, 1000000 },
+	{ 5, 1000000 },
+	{ 10, 1000000 },
+	{ 20, 1000000 },
+	{ 50, 1000000 },
+	{ 100, 1000000 },
+	{ 200, 1000000 },
+	{ 500, 1000000 },
+	/* milliseconds */
+	{ 1, 1000 },
+	{ 2, 1000 },
+	{ 5, 1000 },
+	{ 10, 1000 },
+	{ 20, 1000 },
+	{ 50, 1000 },
+	{ 100, 1000 },
+	{ 200, 1000 },
+	{ 500, 1000 },
+	/* seconds */
+	{ 1, 1 },
+	{ 2, 1 },
+	{ 5, 1 },
+	{ 10, 1 },
+	{ 20, 1 },
+	{ 50, 1 },
+	{ 100, 1 },
+	{ 200, 1 },
+	{ 500, 1 },
+	{ 1000, 1 },
+};
+
+static const struct sr_rational lecroy_vdivs[] = {
+	/* millivolts */
+	{ 1, 1000 },
+	{ 2, 1000 },
+	{ 5, 1000 },
+	{ 10, 1000 },
+	{ 20, 1000 },
+	{ 50, 1000 },
+	{ 100, 1000 },
+	{ 200, 1000 },
+	{ 500, 1000 },
+	/* volts */
+	{ 1, 1 },
+	{ 2, 1 },
+	{ 5, 1 },
+	{ 10, 1 },
+	{ 20, 1 },
+	{ 50, 1 },
+};
+
+static const char *scope_analog_channel_names[] = {
+	"CH1",
+	"CH2",
+	"CH3",
+	"CH4",
+};
+
+static const struct scope_config scope_models[] = {
+	{
+		.name = { "WP7000", "WP7100", "WP7200", "WP7300" },
+
+		.analog_channels = 4,
+		.analog_names = &scope_analog_channel_names,
+
+		.devopts = &lecroy_devopts,
+		.num_devopts = ARRAY_SIZE(lecroy_devopts),
+
+		.analog_devopts = &lecroy_analog_devopts,
+		.num_analog_devopts = ARRAY_SIZE(lecroy_analog_devopts),
+
+		.coupling_options = &lecroy_coupling_options,
+		.trigger_sources = &lecroy_xstream_trigger_sources,
+		.trigger_slopes = &scope_trigger_slopes,
+
+		.timebases = lecroy_timebases,
+		.num_timebases = ARRAY_SIZE(lecroy_timebases),
+
+		.vdivs = lecroy_vdivs,
+		.num_vdivs = ARRAY_SIZE(lecroy_vdivs),
+
+		.num_xdivs = 10,
+		.num_ydivs = 8,
+	},
+};
+
+static void scope_state_dump(const struct scope_config *config,
+			     struct scope_state *state)
+{
+	unsigned int i;
+	char *tmp;
+
+	for (i = 0; i < config->analog_channels; i++) {
+		tmp = sr_voltage_string(config->vdivs[state->analog_channels[i].vdiv].p,
+					config->vdivs[state->analog_channels[i].vdiv].q);
+		sr_info("State of analog channel %d -> %s : %s (coupling) %s (vdiv) %2.2e (offset)",
+			i + 1, state->analog_channels[i].state ? "On" : "Off",
+			(*config->coupling_options)[state->analog_channels[i].coupling],
+			tmp, state->analog_channels[i].vertical_offset);
+	}
+
+	tmp = sr_period_string_f(1.0/(((float)config->timebases[state->timebase].p) /
+				      ((float)config->timebases[state->timebase].q)), 0);
+	sr_info("Current timebase: %s", tmp);
+	g_free(tmp);
+
+	tmp = sr_samplerate_string(state->sample_rate);
+	sr_info("Current samplerate: %s", tmp);
+	g_free(tmp);
+
+	sr_info("Current trigger: %s (source), %s (slope) %.2f (offset)",
+		(*config->trigger_sources)[state->trigger_source],
+		(*config->trigger_slopes)[state->trigger_slope],
+		state->horiz_triggerpos);
+}
+
+static int scope_state_get_array_option(const char *resp,
+					const char *(*array)[],
+					int *result)
+{
+	unsigned int i;
+
+	for (i = 0; (*array)[i]; i++) {
+		if (!g_strcmp0(resp, (*array)[i])) {
+			*result = i;
+			return SR_OK;
+		}
+	}
+
+	return SR_ERR;
+}
+
+/**
+ * This function takes a value of the form "2.000E-03" and returns the index
+ * of an array where a matching pair was found.
+ *
+ * @param value The string to be parsed.
+ * @param array The array of s/f pairs.
+ * @param array_len The number of pairs in the array.
+ * @param result The index at which a matching pair was found.
+ *
+ * @return SR_ERR on any parsing error, SR_OK otherwise.
+ */
+static int array_float_get(gchar *value, const struct sr_rational *aval,
+		int array_len, unsigned int *result)
+{
+	struct sr_rational rval;
+
+	if (sr_parse_rational(value, &rval) != SR_OK)
+		return SR_ERR;
+
+	for (int i = 0; i < array_len; i++) {
+		if (sr_rational_eq(&rval, aval+i)) {
+			*result = i;
+			return SR_OK;
+		}
+	}
+
+	return SR_ERR;
+}
+
+static int analog_channel_state_get(struct sr_scpi_dev_inst *scpi,
+				    const struct scope_config *config,
+				    struct scope_state *state)
+{
+	unsigned int i, j;
+	char command[MAX_COMMAND_SIZE];
+	char *tmp_str;
+
+	for (i = 0; i < config->analog_channels; i++) {
+		g_snprintf(command, sizeof(command), "C%d:TRACE?", i+1);
+
+		if (sr_scpi_get_bool(scpi, command,
+					&state->analog_channels[i].state) != SR_OK)
+			return SR_ERR;
+
+		g_snprintf(command, sizeof(command), "C%d:VDIV?", i+1);
+
+		if (sr_scpi_get_string(scpi, command, &tmp_str) != SR_OK)
+			return SR_ERR;
+
+                if (array_float_get(tmp_str, lecroy_vdivs, ARRAY_SIZE(lecroy_vdivs),
+				    &j) != SR_OK) {
+			g_free(tmp_str);
+			sr_err("Could not determine array index for vertical div scale.");
+			return SR_ERR;
+		}
+
+		g_free(tmp_str);
+		state->analog_channels[i].vdiv = j;
+
+		g_snprintf(command, sizeof(command), "C%d:OFFSET?", i+1);
+
+		if (sr_scpi_get_float(scpi, command, &state->analog_channels[i].vertical_offset) != SR_OK)
+			return SR_ERR;
+
+		g_snprintf(command, sizeof(command), "C%d:COUPLING?", i+1);
+
+		if (sr_scpi_get_string(scpi, command, &tmp_str) != SR_OK)
+			return SR_ERR;
+
+
+		if (scope_state_get_array_option(tmp_str, config->coupling_options,
+					 &state->analog_channels[i].coupling) != SR_OK)
+			return SR_ERR;
+
+		g_free(tmp_str);
+	}
+
+	return SR_OK;
+}
+
+SR_PRIV int lecroy_xstream_update_sample_rate(const struct sr_dev_inst *sdi)
 {
-	const struct sr_dev_inst *sdi;
 	struct dev_context *devc;
+	struct scope_state *state;
+	const struct scope_config *config;
+	float memsize, timediv;
+
+	devc = sdi->priv;
+	state = devc->model_state;
+	config = devc->model_config;
+
+	if (sr_scpi_get_float(sdi->conn, "MEMORY_SIZE?", &memsize) != SR_OK)
+			return SR_ERR;
+
+	if (sr_scpi_get_float(sdi->conn, "TIME_DIV?", &timediv) != SR_OK)
+		return SR_ERR;
+
+	state->sample_rate = 1/((timediv * config->num_xdivs) / memsize);
+
+	return SR_OK;
+}
+
+SR_PRIV int lecroy_xstream_state_get(struct sr_dev_inst *sdi)
+{
+	struct dev_context *devc;
+	struct scope_state *state
+;	const struct scope_config *config;
+	unsigned int i;
+	char *tmp_str, *tmp_str2, *tmpp, *p, *key;
+	char command[MAX_COMMAND_SIZE];
+	char *trig_source = NULL;
+
+	devc = sdi->priv;
+	config = devc->model_config;
+	state = devc->model_state;
+
+	sr_info("Fetching scope state");
+
+	if (analog_channel_state_get(sdi->conn, config, state) != SR_OK)
+		return SR_ERR;
+
+	if (sr_scpi_get_string(sdi->conn, "TIME_DIV?", &tmp_str) != SR_OK)
+		return SR_ERR;
+
+	if (array_float_get(tmp_str, lecroy_timebases, ARRAY_SIZE(lecroy_timebases),
+			    &i) != SR_OK) {
+		g_free(tmp_str);
+		sr_err("Could not determine array index for timbase scale.");
+		return SR_ERR;
+	}
+	g_free(tmp_str);
+	state->timebase = i;
+
+	if (sr_scpi_get_string(sdi->conn, "TRIG_SELECT?", &tmp_str) != SR_OK)
+		return SR_ERR;
+
+	tmp_str2 = tmp_str;
+	i = 0;
+	while((p = strtok_r(tmp_str2, ",", &tmpp))) {
+		tmp_str2 = NULL;
+		if (i == 0) {
+			/* trigger type */
+		} else if (i & 1) {
+			key = p;
+			/* key */
+		} else if (!(i & 1)) {
+			if (!strcmp(key, "SR"))
+				trig_source = p;
+		}
+		i++;
+	}
+
+	if (!trig_source || scope_state_get_array_option(trig_source, config->trigger_sources,
+							&state->trigger_source) != SR_OK)
+		return SR_ERR;
+
 
+	g_snprintf(command, sizeof(command), "%s:TRIG_SLOPE?", trig_source);
+	if (sr_scpi_get_string(sdi->conn, command, &tmp_str) != SR_OK)
+		return SR_ERR;
+
+	if (scope_state_get_array_option(tmp_str,
+		config->trigger_slopes, &state->trigger_slope) != SR_OK)
+		return SR_ERR;
+
+	if (sr_scpi_get_float(sdi->conn, "TRIG_DELAY?",	&state->horiz_triggerpos) != SR_OK)
+		return SR_ERR;
+
+	if (lecroy_xstream_update_sample_rate(sdi) != SR_OK)
+		return SR_ERR;
+
+	sr_info("Fetching finished.");
+
+	scope_state_dump(config, state);
+
+	return SR_OK;
+}
+
+static struct scope_state *scope_state_new(const struct scope_config *config)
+{
+	struct scope_state *state;
+
+	state = g_malloc0(sizeof(struct scope_state));
+	state->analog_channels = g_malloc0_n(config->analog_channels,
+			sizeof(struct analog_channel_state));
+	return state;
+}
+
+SR_PRIV void lecroy_xstream_state_free(struct scope_state *state)
+{
+	g_free(state->analog_channels);
+	g_free(state);
+}
+
+SR_PRIV int lecroy_xstream_init_device(struct sr_dev_inst *sdi)
+{
+	char command[MAX_COMMAND_SIZE];
+	int model_index;
+	unsigned int i, j;
+	struct sr_channel *ch;
+	struct dev_context *devc;
+	gboolean channel_enabled;
+
+	devc = sdi->priv;
+	model_index = -1;
+
+	/* Find the exact model. */
+	for (i = 0; i < ARRAY_SIZE(scope_models); i++) {
+		for (j = 0; scope_models[i].name[j]; j++) {
+			if (!strcmp(sdi->model, scope_models[i].name[j])) {
+				model_index = i;
+				break;
+			}
+		}
+		if (model_index != -1)
+			break;
+	}
+
+	if (model_index == -1) {
+		sr_dbg("Unsupported LECROY device.");
+		return SR_ERR_NA;
+	}
+
+	devc->analog_groups = g_malloc0(sizeof(struct sr_channel_group*) *
+					scope_models[model_index].analog_channels);
+
+	/* Add analog channels. */
+	for (i = 0; i < scope_models[model_index].analog_channels; i++) {
+
+		g_snprintf(command, sizeof(command), "C%d:TRACE?", i+1);
+
+		if (sr_scpi_get_bool(sdi->conn, command, &channel_enabled) != SR_OK)
+			return SR_ERR;
+
+		g_snprintf(command, sizeof(command), "C%d:VDIV?", i+1);
+
+		ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, channel_enabled,
+			   (*scope_models[model_index].analog_names)[i]);
+
+		devc->analog_groups[i] = g_malloc0(sizeof(struct sr_channel_group));
+
+		devc->analog_groups[i]->name = g_strdup(
+			(char *)(*scope_models[model_index].analog_names)[i]);
+		devc->analog_groups[i]->channels = g_slist_append(NULL, ch);
+
+		sdi->channel_groups = g_slist_append(sdi->channel_groups,
+						   devc->analog_groups[i]);
+	}
+
+	devc->model_config = &scope_models[model_index];
+	devc->frame_limit = 0;
+
+	if (!(devc->model_state = scope_state_new(devc->model_config)))
+		return SR_ERR_MALLOC;
+
+	return SR_OK;
+}
+
+static int lecroy_waveform_2_x_to_analog(GByteArray *data,
+					 struct lecroy_wavedesc *desc,
+					 struct sr_datafeed_analog *analog)
+{
+	struct sr_analog_encoding *encoding = analog->encoding;
+	struct sr_analog_meaning *meaning = analog->meaning;
+	struct sr_analog_spec *spec = analog->spec;
+	float *data_float;
+	int16_t *waveform_data;
+	unsigned int i, num_samples;
+
+	data_float  = g_malloc(desc->version_2_x.wave_array_count * sizeof(float));
+	num_samples = desc->version_2_x.wave_array_count;
+
+	waveform_data = (int16_t *)(data->data +
+				    + desc->version_2_x.wave_descriptor_length
+				    + desc->version_2_x.user_text_len);
+
+	for(i = 0; i  < num_samples; i++)
+		data_float[i] = (float)waveform_data[i]
+			* desc->version_2_x.vertical_gain
+			+ desc->version_2_x.vertical_offset;
+
+
+	analog->data = data_float;
+	analog->num_samples = num_samples;
+
+	encoding->unitsize = sizeof(float);
+	encoding->is_signed = TRUE;
+	encoding->is_float = TRUE;
+	encoding->is_bigendian = FALSE;
+	encoding->scale.p = 1;
+	encoding->scale.q = 1;
+	encoding->offset.p = 0;
+	encoding->offset.q = 1;
+
+	encoding->digits = 6;
+	encoding->is_digits_decimal = FALSE;
+
+	if (strcmp(desc->version_2_x.vertunit, "A")) {
+		meaning->mq = SR_MQ_CURRENT;
+		meaning->unit = SR_UNIT_AMPERE;
+	} else {
+		/* default to voltage */
+		meaning->mq = SR_MQ_VOLTAGE;
+		meaning->unit = SR_UNIT_VOLT;
+	}
+
+	meaning->mqflags = 0;
+	spec->spec_digits = 3;
+	return SR_OK;
+}
+
+static int lecroy_waveform_to_analog(GByteArray *data,
+				     struct sr_datafeed_analog *analog)
+{
+	struct lecroy_wavedesc *desc;
+
+	if (data->len < sizeof(struct lecroy_wavedesc))
+		return SR_ERR;
+
+	desc = (struct lecroy_wavedesc *)data->data;
+
+	if (!strncmp(desc->template_name, "LECROY_2_2", 16) ||
+	    !strncmp(desc->template_name, "LECROY_2_3", 16)) {
+		return lecroy_waveform_2_x_to_analog(data, desc, analog);
+	}
+
+	sr_err("Waveformat template '%.16s' not supported\n", desc->template_name);
+	return SR_ERR;
+}
+
+SR_PRIV int lecroy_xstream_receive_data(int fd, int revents, void *cb_data)
+{
+	struct sr_channel *ch;
+	struct sr_dev_inst *sdi;
+	struct dev_context *devc;
+	struct sr_datafeed_packet packet;
+	GByteArray *data;
+	struct sr_datafeed_analog analog;
+	struct sr_analog_encoding encoding;
+	struct sr_analog_meaning meaning;
+	struct sr_analog_spec spec;
+	char buf[8];
 	(void)fd;
+	(void)revents;
+
+	data = NULL;
 
 	if (!(sdi = cb_data))
 		return TRUE;
@@ -33,8 +626,76 @@ SR_PRIV int lecroy_xstream_receive_data(int fd, int revents, void *cb_data)
 	if (!(devc = sdi->priv))
 		return TRUE;
 
-	if (revents == G_IO_IN) {
-		/* TODO */
+	ch = devc->current_channel->data;
+
+	/*
+	 * Send "frame begin" packet upon reception of data for the
+	 * first enabled channel.
+	 */
+	if (devc->current_channel == devc->enabled_channels) {
+		packet.type = SR_DF_FRAME_BEGIN;
+		sr_session_send(sdi, &packet);
+	}
+
+	if (ch->type != SR_CHANNEL_ANALOG)
+		return SR_ERR;
+	/*
+	 * Pass on the received data of the channel(s).
+	 */
+	if (sr_scpi_read_data(sdi->conn, buf, 4) != 4) {
+		sr_err("reading header failed\n");
+		return TRUE;
+	}
+
+	if (sr_scpi_get_block(sdi->conn, NULL, &data) != SR_OK) {
+		if (data)
+			g_byte_array_free(data, TRUE);
+		return TRUE;
+	}
+
+	analog.encoding = &encoding;
+	analog.meaning = &meaning;
+	analog.spec = &spec;
+
+	if (lecroy_waveform_to_analog(data, &analog) != SR_OK)
+		return SR_ERR;
+
+	meaning.channels = g_slist_append(NULL, ch);
+	packet.payload = &analog;
+	packet.type = SR_DF_ANALOG;
+	sr_session_send(sdi, &packet);
+
+	g_byte_array_free(data, TRUE);
+	data = NULL;
+
+	g_slist_free(meaning.channels);
+	g_free(analog.data);
+
+
+	/*
+	 * Advance to the next enabled channel. When data for all enabled
+	 * channels was received, then flush potentially queued logic data,
+	 * and send the "frame end" packet.
+	 */
+	if (devc->current_channel->next) {
+		devc->current_channel = devc->current_channel->next;
+		lecroy_xstream_request_data(sdi);
+		return TRUE;
+	}
+
+	packet.type = SR_DF_FRAME_END;
+	sr_session_send(sdi, &packet);
+
+	/*
+	 * End of frame was reached. Stop acquisition after the specified
+	 * number of frames, or continue reception by starting over at
+	 * the first enabled channel.
+	 */
+	if (++devc->num_frames == devc->frame_limit) {
+		sdi->driver->dev_acquisition_stop(sdi);
+	} else {
+		devc->current_channel = devc->enabled_channels;
+		lecroy_xstream_request_data(sdi);
 	}
 
 	return TRUE;
diff --git a/src/hardware/lecroy-xstream/protocol.h b/src/hardware/lecroy-xstream/protocol.h
index 4fe4400b..fd5eb14e 100644
--- a/src/hardware/lecroy-xstream/protocol.h
+++ b/src/hardware/lecroy-xstream/protocol.h
@@ -1,7 +1,7 @@
 /*
  * This file is part of the libsigrok project.
  *
- * Copyright (C) 2017 Sven Schnelle <svens@stackframe.org>
+ * 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
@@ -20,25 +20,90 @@
 #ifndef LIBSIGROK_HARDWARE_LECROY_XSTREAM_PROTOCOL_H
 #define LIBSIGROK_HARDWARE_LECROY_XSTREAM_PROTOCOL_H
 
-#include <stdint.h>
 #include <glib.h>
+#include <stdint.h>
+#include <string.h>
 #include <libsigrok/libsigrok.h>
 #include "libsigrok-internal.h"
 
 #define LOG_PREFIX "lecroy-xstream"
 
+#define MAX_INSTRUMENT_VERSIONS 10
+#define MAX_COMMAND_SIZE 48
+#define MAX_ANALOG_CHANNEL_COUNT 4
+
+struct scope_config {
+	const char *name[MAX_INSTRUMENT_VERSIONS];
+	const uint8_t analog_channels;
+
+	const char *(*analog_names)[];
+
+	const uint32_t (*devopts)[];
+	const uint8_t num_devopts;
+
+	const uint32_t (*analog_devopts)[];
+	const uint8_t num_analog_devopts;
+
+	const char *(*coupling_options)[];
+	const uint8_t num_coupling_options;
+
+	const char *(*trigger_sources)[];
+	const uint8_t num_trigger_sources;
+
+	const char *(*trigger_slopes)[];
+
+	const struct sr_rational *timebases;
+	const uint8_t num_timebases;
+
+	const struct sr_rational *vdivs;
+	const uint8_t num_vdivs;
+
+	const uint8_t num_xdivs;
+	const uint8_t num_ydivs;
+};
+
+struct analog_channel_state {
+	int coupling;
+
+	int vdiv;
+	float vertical_offset;
+
+	gboolean state;
+};
+
+struct scope_state {
+	struct analog_channel_state *analog_channels;
+
+	int timebase;
+	float horiz_triggerpos;
+
+	int trigger_source;
+	int trigger_slope;
+	uint64_t sample_rate;
+};
+
 /** Private, per-device-instance driver context. */
 struct dev_context {
-	/* Model-specific information */
+	const void *model_config;
+	void *model_state;
 
-	/* Acquisition settings */
+	struct sr_channel_group **analog_groups;
 
-	/* Operational state */
+	GSList *enabled_channels;
+	GSList *current_channel;
+	uint64_t num_frames;
 
-	/* Temporary state across callbacks */
+	uint64_t frame_limit;
 
 };
 
+SR_PRIV int lecroy_xstream_init_device(struct sr_dev_inst *sdi);
+SR_PRIV int lecroy_xstream_request_data(const struct sr_dev_inst *sdi);
 SR_PRIV int lecroy_xstream_receive_data(int fd, int revents, void *cb_data);
 
+SR_PRIV struct scope_state *lecroy_xstream_state_new(struct scope_config *config);
+SR_PRIV void lecroy_xstream_state_free(struct scope_state *state);
+SR_PRIV int lecroy_xstream_state_get(struct sr_dev_inst *sdi);
+SR_PRIV int lecroy_xstream_update_sample_rate(const struct sr_dev_inst *sdi);
+
 #endif