X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Fhardware%2Fyokogawa-dlm%2Fapi.c;h=27957406386828511c03b02b4120be07382307e8;hb=bf622e6d00e7985e36a0ddb643e2bf05d66679a6;hp=614c4a7a0164ac229ced45e3d48afabc73f02e90;hpb=107639373df3d592961eb70111e6f4ccb36f74fa;p=libsigrok.git

diff --git a/src/hardware/yokogawa-dlm/api.c b/src/hardware/yokogawa-dlm/api.c
index 614c4a7a..27957406 100644
--- a/src/hardware/yokogawa-dlm/api.c
+++ b/src/hardware/yokogawa-dlm/api.c
@@ -21,22 +21,721 @@
 #include <stdlib.h>
 #include "protocol.h"
 
+SR_PRIV struct sr_dev_driver yokogawa_dlm_driver_info;
+static struct sr_dev_driver *di = &yokogawa_dlm_driver_info;
+
+static char *MANUFACTURER_ID = "YOKOGAWA";
+static char *MANUFACTURER_NAME = "Yokogawa";
+
+static const uint32_t drvopts[] = {
+	SR_CONF_LOGIC_ANALYZER,
+	SR_CONF_OSCILLOSCOPE,
+};
+
+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 struct sr_dev_inst *probe_usbtmc_device(struct sr_scpi_dev_inst *scpi)
+{
+	struct sr_dev_inst *sdi;
+	struct dev_context *devc;
+	struct sr_scpi_hw_info *hw_info;
+	char *model_name;
+	int model_index;
+
+	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 (strcmp(hw_info->manufacturer, MANUFACTURER_ID) != 0)
+		goto fail;
+
+	if (dlm_model_get(hw_info->model, &model_name, &model_index) != SR_OK)
+		goto fail;
+
+	sdi = g_malloc0(sizeof(struct sr_dev_inst));
+	sdi->status = SR_ST_ACTIVE;
+	sdi->vendor = g_strdup(MANUFACTURER_NAME);
+	sdi->model = g_strdup(model_name);
+	sdi->version = g_strdup(hw_info->firmware_version);
+
+	sdi->serial_num = g_strdup(hw_info->serial_number);
+
+	sr_scpi_hw_info_free(hw_info);
+	hw_info = NULL;
+
+	devc = g_malloc0(sizeof(struct dev_context));
+
+	sdi->driver = di;
+	sdi->priv = devc;
+	sdi->inst_type = SR_INST_SCPI;
+	sdi->conn = scpi;
+
+	if (dlm_device_init(sdi, model_index) != 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, probe_usbtmc_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;
+
+	dlm_scope_state_destroy(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 (dlm_scope_state_query(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;
+}
+
+/**
+ * Check which category a given channel group belongs to.
+ *
+ * @param devc Our internal device context.
+ * @param cg   The channel group to check.
+ *
+ * @retval CG_NONE    cg is NULL
+ * @retval CG_ANALOG  cg is an analog group
+ * @retval CG_DIGITAL cg is a digital group
+ * @retval CG_INVALID cg is something else
+ */
+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->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_HDIV:
+		*data = g_variant_new_int32(model->num_xdivs);
+		ret = SR_OK;
+		break;
+	case SR_CONF_TIMEBASE:
+		*data = g_variant_new("(tt)",
+				(*model->timebases)[state->timebase][0],
+				(*model->timebases)[state->timebase][1]);
+		ret = SR_OK;
+		break;
+	case SR_CONF_NUM_VDIV:
+		if (cg_type == CG_NONE) {
+			sr_err("No channel group specified.");
+			return SR_ERR_CHANNEL_GROUP;
+		} else if (cg_type == CG_ANALOG) {
+				*data = g_variant_new_int32(model->num_ydivs);
+				ret = SR_OK;
+				break;
+		} else {
+			ret = SR_ERR_NA;
+		}
+		break;
+	case SR_CONF_VDIV:
+		ret = SR_ERR_NA;
+		if (cg_type == CG_NONE) {
+			sr_err("No channel group specified.");
+			return SR_ERR_CHANNEL_GROUP;
+		} else if (cg_type != CG_ANALOG)
+			break;
+
+		for (i = 0; i < model->analog_channels; ++i) {
+			if (cg != devc->analog_groups[i])
+				continue;
+			*data = g_variant_new("(tt)",
+					(*model->vdivs)[state->analog_states[i].vdiv][0],
+					(*model->vdivs)[state->analog_states[i].vdiv][1]);
+			ret = SR_OK;
+			break;
+		}
+		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:
+		ret = SR_ERR_NA;
+		if (cg_type == CG_NONE) {
+			sr_err("No channel group specified.");
+			return SR_ERR_CHANNEL_GROUP;
+		} else if (cg_type != CG_ANALOG)
+			break;
+
+		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_states[i].coupling]);
+			ret = SR_OK;
+			break;
+		}
+		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 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;
+			/* TODO: A and B trigger support possible? */
+			ret = dlm_trigger_source_set(sdi->conn, (*model->trigger_sources)[i]);
+			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_states[j - 1].vdiv = i;
+				g_ascii_formatd(float_str, sizeof(float_str),
+						"%E", (float) p / q);
+				if (dlm_analog_chan_vdiv_set(sdi->conn, j, float_str) != 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);
+			ret = dlm_timebase_set(sdi->conn, float_str);
+			update_sample_rate = TRUE;
+			break;
+		}
+		break;
+	case SR_CONF_HORIZ_TRIGGERPOS:
+		tmp_d = g_variant_get_double(data);
+
+		/* TODO: Check if the calculation makes sense for the DLM. */
+		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);
+		ret = dlm_horiz_trigger_pos_set(sdi->conn, float_str);
+		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;
+
+		/* Note: See dlm_trigger_slopes[] in protocol.c. */
+		state->trigger_slope = (tmp[0] == 'r') ?
+				SLOPE_POSITIVE : SLOPE_NEGATIVE;
+
+		ret = dlm_trigger_slope_set(sdi->conn, state->trigger_slope);
+		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_states[j-1].coupling = i;
+
+				if (dlm_analog_chan_coupl_set(sdi->conn, j, tmp) != 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 = dlm_sample_rate_query(sdi);
+
+	return ret;
+}
+
+static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
+		const struct sr_channel_group *cg)
+{
+	int cg_type = CG_NONE;
+	struct dev_context *devc = NULL;
+	struct scope_config *model = NULL;
+
+	if (sdi && (devc = sdi->priv)) {
+		if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
+			return SR_ERR;
+
+		model = devc->model_config;
+	}
+
+	switch (key) {
+	case SR_CONF_DEVICE_OPTIONS:
+		if (cg_type == CG_NONE) {
+			if (model)
+				*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
+					model->devopts, model->num_devopts, sizeof(uint32_t));
+			else
+				*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
+					drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
+		} else if (cg_type == CG_ANALOG) {
+			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
+				model->analog_devopts, model->num_analog_devopts, sizeof(uint32_t));
+		} else {
+			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
+				NULL, 0, sizeof(uint32_t));
+		}
+		break;
+	case SR_CONF_COUPLING:
+		if (cg_type == CG_NONE)
+			return SR_ERR_CHANNEL_GROUP;
+		*data = g_variant_new_strv(*model->coupling_options,
+				g_strv_length((char **)*model->coupling_options));
+		break;
+	case SR_CONF_TRIGGER_SOURCE:
+		if (!model)
+			return SR_ERR_ARG;
+		*data = g_variant_new_strv(*model->trigger_sources,
+				g_strv_length((char **)*model->trigger_sources));
+		break;
+	case SR_CONF_TRIGGER_SLOPE:
+		if (!model)
+			return SR_ERR_ARG;
+		*data = g_variant_new_strv(*model->trigger_slopes,
+				g_strv_length((char **)*model->trigger_slopes));
+		break;
+	case SR_CONF_TIMEBASE:
+		if (!model)
+			return SR_ERR_ARG;
+		*data = build_tuples(model->timebases, model->num_timebases);
+		break;
+	case SR_CONF_VDIV:
+		if (cg_type == CG_NONE)
+			return SR_ERR_CHANNEL_GROUP;
+		*data = build_tuples(model->vdivs, model->num_vdivs);
+		break;
+	default:
+		return SR_ERR_NA;
+	}
+
+	return SR_OK;
+}
+
+static int dlm_check_channels(GSList *channels)
+{
+	GSList *l;
+	struct sr_channel *ch;
+	gboolean enabled_pod1, enabled_chan4;
+
+	enabled_pod1 = enabled_chan4 = FALSE;
+
+	/* Note: On the DLM2000, CH4 and Logic are shared. */
+	/* TODO Handle non-DLM2000 models. */
+	for (l = channels; l; l = l->next) {
+		ch = l->data;
+		switch (ch->type) {
+		case SR_CHANNEL_ANALOG:
+			if (ch->index == 3)
+				enabled_chan4 = TRUE;
+			break;
+		case SR_CHANNEL_LOGIC:
+			enabled_pod1 = TRUE;
+			break;
+		default:
+			return SR_ERR;
+		}
+	}
+
+	if (enabled_pod1 && enabled_chan4)
+		return SR_ERR;
+
+	return SR_OK;
+}
+
+static int dlm_setup_channels(const struct sr_dev_inst *sdi)
+{
+	GSList *l;
+	unsigned int i;
+	gboolean *pod_enabled, setup_changed;
+	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_malloc0(sizeof(gboolean) * model->pods);
+
+	for (l = sdi->channels; l; l = l->next) {
+		ch = l->data;
+		switch (ch->type) {
+		case SR_CHANNEL_ANALOG:
+			if (ch->enabled == state->analog_states[ch->index].state)
+				break;
+
+			if (dlm_analog_chan_state_set(scpi, ch->index + 1,
+					ch->enabled) != SR_OK)
+				return SR_ERR;
+
+			state->analog_states[ch->index].state = ch->enabled;
+			setup_changed = TRUE;
+			break;
+		case SR_CHANNEL_LOGIC:
+			if (ch->enabled)
+				pod_enabled[ch->index / 8] = TRUE;
+
+			if (ch->enabled == state->digital_states[ch->index])
+				break;
+
+			if (dlm_digital_chan_state_set(scpi, ch->index + 1,
+					ch->enabled) != SR_OK)
+				return SR_ERR;
+
+			state->digital_states[ch->index] = ch->enabled;
+			setup_changed = TRUE;
+			break;
+		default:
+			return SR_ERR;
+		}
+	}
+
+	for (i = 1; i <= model->pods; ++i) {
+		if (state->pod_states[i - 1] == pod_enabled[i - 1])
+			continue;
+
+		if (dlm_digital_pod_state_set(scpi, i,
+				pod_enabled[i - 1]) != SR_OK)
+			return SR_ERR;
+
+		state->pod_states[i - 1] = pod_enabled[i - 1];
+		setup_changed = TRUE;
+	}
+
+	g_free(pod_enabled);
+
+	if (setup_changed && dlm_sample_rate_query(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;
+
+	(void)cb_data;
+
+	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 (dlm_check_channels(devc->enabled_channels) != SR_OK) {
+		sr_err("Invalid channel configuration specified!");
+		return SR_ERR_NA;
+	}
+
+	if (dlm_setup_channels(sdi) != SR_OK) {
+		sr_err("Failed to setup channel configuration!");
+		return SR_ERR;
+	}
+
+	/* Request data for the first enabled channel. */
+	devc->current_channel = devc->enabled_channels;
+	dlm_channel_data_request(sdi);
+
+	/* Call our callback when data comes in or after 5ms. */
+	sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 5,
+			dlm_data_receive, (void *)sdi);
+
+	return SR_OK;
+}
+
+static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
+{
+	struct dev_context *devc;
+	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;
+
+	sr_scpi_source_remove(sdi->session, sdi->conn);
+
+	return SR_OK;
+}
 
 SR_PRIV struct sr_dev_driver yokogawa_dlm_driver_info = {
 	.name = "yokogawa-dlm",
-	.longname = "Yokogawa DL/DLM driver",
+	.longname = "Yokogawa DL/DLM",
 	.api_version = 1,
-	.init = NULL,
-	.cleanup = NULL,
-	.scan = NULL,
-	.dev_list = NULL,
-	.dev_clear = NULL,
-	.config_get = NULL,
-	.config_set = NULL,
-	.config_list = NULL,
-	.dev_open = NULL,
-	.dev_close = NULL,
-	.dev_acquisition_start = NULL,
-	.dev_acquisition_stop = NULL,
+	.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,
 };