[libsigrok.git] / src / hardware / uni-t-ut32x / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2013 Bert Vermeulen <bert@biot.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 "protocol.h"

#include <string.h>

static const uint32_t devopts[] = {
	SR_CONF_THERMOMETER,
	SR_CONF_CONTINUOUS,
	SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
	SR_CONF_DATA_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
};

static char *channels[] = {
	"T1",
	"T2",
	"T1-T2",
};

static const char *data_sources[] = {
	"Live",
	"Memory",
};

SR_PRIV struct sr_dev_driver uni_t_ut32x_driver_info;


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

static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_dev_inst *sdi;
	struct sr_config *src;
	GSList *usb_devices, *devices, *l;
	int i;
	const char *conn;

	drvc = di->priv;
	drvc->instances = NULL;

	conn = NULL;
	for (l = options; l; l = l->next) {
		src = l->data;
		switch (src->key) {
		case SR_CONF_CONN:
			conn = g_variant_get_string(src->data, NULL);
			break;
		}
	}
	if (!conn)
		return NULL;

	devices = NULL;
	if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn))) {
		/* We have a list of sr_usb_dev_inst matching the connection
		 * string. Wrap them in sr_dev_inst and we're done. */
		for (l = usb_devices; l; l = l->next) {
			sdi = g_malloc0(sizeof(struct sr_dev_inst));
			sdi->status = SR_ST_INACTIVE;
			sdi->vendor = g_strdup(VENDOR);
			sdi->model = g_strdup(MODEL);
			sdi->driver = di;
			sdi->inst_type = SR_INST_USB;
			sdi->conn = l->data;
			for (i = 0; i < 3; i++)
				sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channels[i]);
			devc = g_malloc0(sizeof(struct dev_context));
			sdi->priv = devc;
			devc->limit_samples = 0;
			devc->data_source = DEFAULT_DATA_SOURCE;
			drvc->instances = g_slist_append(drvc->instances, sdi);
			devices = g_slist_append(devices, sdi);
		}
		g_slist_free(usb_devices);
	} else
		g_slist_free_full(usb_devices, g_free);

	return devices;
}

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

static int dev_open(struct sr_dev_inst *sdi)
{
	struct sr_dev_driver *di = sdi->driver;
	struct drv_context *drvc;
	struct sr_usb_dev_inst *usb;
	int ret;

	if (!(drvc = di->priv)) {
		sr_err("Driver was not initialized.");
		return SR_ERR;
	}

	usb = sdi->conn;

	if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
		return SR_ERR;

/*
 * The libusbx 1.0.9 darwin backend is broken: it can report a kernel
 * driver being active, but detaching it always returns an error.
 */
#if !defined(__APPLE__)
	if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) {
		if ((ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE)) < 0) {
			sr_err("failed to detach kernel driver: %s",
					libusb_error_name(ret));
			return SR_ERR;
		}
	}
#endif

	if ((ret = libusb_set_configuration(usb->devhdl, USB_CONFIGURATION))) {
		sr_err("Failed to set configuration: %s.", libusb_error_name(ret));
		return SR_ERR;
	}

	if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE))) {
		sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
		return SR_ERR;
	}
	sdi->status = SR_ST_ACTIVE;

	return ret;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	struct sr_dev_driver *di = sdi->driver;
	struct sr_usb_dev_inst *usb;

	if (!di->priv) {
		sr_err("Driver was not initialized.");
		return SR_ERR;
	}

	usb = sdi->conn;
	if (!usb->devhdl)
		/*  Nothing to do. */
		return SR_OK;

	libusb_release_interface(usb->devhdl, USB_INTERFACE);
	libusb_close(usb->devhdl);
	usb->devhdl = NULL;
	sdi->status = SR_ST_INACTIVE;

	return SR_OK;
}

static int cleanup(const struct sr_dev_driver *di)
{
	int ret;
	struct drv_context *drvc;

	if (!(drvc = di->priv))
		/* Can get called on an unused driver, doesn't matter. */
		return SR_OK;


	ret = std_dev_clear(di, NULL);
	g_free(drvc);

	return ret;
}

static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct dev_context *devc;

	(void)cg;

	devc = sdi->priv;
	switch (key) {
	case SR_CONF_LIMIT_SAMPLES:
		*data = g_variant_new_uint64(devc->limit_samples);
		break;
	case SR_CONF_DATA_SOURCE:
		if (devc->data_source == DATA_SOURCE_LIVE)
			*data = g_variant_new_string("Live");
		else
			*data = g_variant_new_string("Memory");
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct sr_dev_driver *di = sdi->driver;
	struct dev_context *devc;
	int ret;
	const char *tmp_str;

	(void)cg;

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

	if (!di->priv) {
		sr_err("Driver was not initialized.");
		return SR_ERR;
	}

	devc = sdi->priv;
	ret = SR_OK;
	switch (key) {
	case SR_CONF_LIMIT_SAMPLES:
		devc->limit_samples = g_variant_get_uint64(data);
		sr_dbg("Setting sample limit to %" PRIu64 ".",
		       devc->limit_samples);
		break;
	case SR_CONF_DATA_SOURCE:
		tmp_str = g_variant_get_string(data, NULL);
		if (!strcmp(tmp_str, "Live"))
			devc->data_source = DATA_SOURCE_LIVE;
		else if (!strcmp(tmp_str, "Memory"))
			devc->data_source = DATA_SOURCE_MEMORY;
		else
			return SR_ERR;
		break;
	default:
		ret = SR_ERR_NA;
	}

	return ret;
}

static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{

	(void)sdi;
	(void)cg;

	switch (key) {
	case SR_CONF_DEVICE_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
		break;
	case SR_CONF_DATA_SOURCE:
		*data = g_variant_new_strv(data_sources, ARRAY_SIZE(data_sources));
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi,
				    void *cb_data)
{
	struct sr_dev_driver *di = sdi->driver;
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_usb_dev_inst *usb;
	int len, ret;
	unsigned char cmd[2];

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

	drvc = di->priv;
	devc = sdi->priv;
	usb = sdi->conn;

	devc->cb_data = cb_data;
	devc->num_samples = 0;
	devc->packet_len = 0;

	/* Configure serial port parameters on USB-UART interface
	 * chip inside the device (just baudrate 2400 actually). */
	cmd[0] = 0x09;
	cmd[1] = 0x60;
	ret = libusb_control_transfer(usb->devhdl, 0x21, 0x09, 0x0300, 0x00,
			cmd, 2, 5);
	if (ret != 2) {
		sr_dbg("Failed to configure CH9325: %s", libusb_error_name(ret));
		return SR_ERR;
	}

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

	if (!(devc->xfer = libusb_alloc_transfer(0)))
		return SR_ERR;

	/* Length of payload to follow. */
	cmd[0] = 0x01;
	if (devc->data_source == DATA_SOURCE_LIVE)
		cmd[1] = CMD_GET_LIVE;
	else
		cmd[1] = CMD_GET_STORED;

	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, cmd, 2, &len, 5);
	if (ret != 0 || len != 2) {
		sr_dbg("Failed to start acquisition: %s", libusb_error_name(ret));
		libusb_free_transfer(devc->xfer);
		return SR_ERR;
	}

	libusb_fill_bulk_transfer(devc->xfer, usb->devhdl, EP_IN, devc->buf,
			8, uni_t_ut32x_receive_transfer, (void *)sdi, 15);
	if (libusb_submit_transfer(devc->xfer) != 0) {
		libusb_free_transfer(devc->xfer);
		return SR_ERR;
	}

	usb_source_add(sdi->session, drvc->sr_ctx, 10,
			uni_t_ut32x_handle_events, (void *)sdi);

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{

	(void)cb_data;

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

	/* Signal USB transfer handler to clean up and stop. */
	sdi->status = SR_ST_STOPPING;

	return SR_OK;
}

SR_PRIV struct sr_dev_driver uni_t_ut32x_driver_info = {
	.name = "uni-t-ut32x",
	.longname = "UNI-T UT32x",
	.api_version = 1,
	.init = init,
	.cleanup = cleanup,
	.scan = scan,
	.dev_list = dev_list,
	.dev_clear = NULL,
	.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
3877dde4 BV	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2013 Bert Vermeulen <bert@biot.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 "protocol.h"
	21
6513f97f BV	22	#include <string.h>
6513f97f BV	23
f254bc4b	24	static const uint32_t devopts[] = {
6513f97f	25	SR_CONF_THERMOMETER,
6513f97f	26	SR_CONF_CONTINUOUS,
5827f61b BV	27	SR_CONF_LIMIT_SAMPLES \| SR_CONF_GET \| SR_CONF_SET,
5827f61b BV	28	SR_CONF_DATA_SOURCE \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
6513f97f BV	29	};
6513f97f BV	30
ba7dd8bb	31	static char *channels[] = {
6513f97f BV	32	"T1",
	33	"T2",
	34	"T1-T2",
	35	};
	36
	37	static const char *data_sources[] = {
	38	"Live",
	39	"Memory",
	40	};
	41
3877dde4	42	SR_PRIV struct sr_dev_driver uni_t_ut32x_driver_info;
3877dde4 BV	43
3877dde4 BV	44
4f840ce9	45	static int init(struct sr_dev_driver di, struct sr_context sr_ctx)
3877dde4 BV	46	{
	47	return std_init(sr_ctx, di, LOG_PREFIX);
	48	}
	49
4f840ce9	50	static GSList scan(struct sr_dev_driver di, GSList *options)
3877dde4 BV	51	{
3877dde4 BV	52	struct drv_context *drvc;
6513f97f BV	53	struct dev_context *devc;
6513f97f BV	54	struct sr_dev_inst *sdi;
6513f97f BV	55	struct sr_config *src;
	56	GSList usb_devices, devices, *l;
	57	int i;
	58	const char *conn;
3877dde4	59
3877dde4 BV	60	drvc = di->priv;
	61	drvc->instances = NULL;
	62
6513f97f BV	63	conn = NULL;
	64	for (l = options; l; l = l->next) {
	65	src = l->data;
	66	switch (src->key) {
	67	case SR_CONF_CONN:
	68	conn = g_variant_get_string(src->data, NULL);
	69	break;
	70	}
	71	}
	72	if (!conn)
	73	return NULL;
	74
	75	devices = NULL;
e196cb61	76	if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn))) {
6513f97f BV	77	/* We have a list of sr_usb_dev_inst matching the connection
	78	* string. Wrap them in sr_dev_inst and we're done. */
	79	for (l = usb_devices; l; l = l->next) {
aac29cc1	80	sdi = g_malloc0(sizeof(struct sr_dev_inst));
0af636be UH	81	sdi->status = SR_ST_INACTIVE;
	82	sdi->vendor = g_strdup(VENDOR);
	83	sdi->model = g_strdup(MODEL);
6513f97f BV	84	sdi->driver = di;
	85	sdi->inst_type = SR_INST_USB;
	86	sdi->conn = l->data;
5e23fcab ML	87	for (i = 0; i < 3; i++)
5e23fcab ML	88	sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channels[i]);
f57d8ffe	89	devc = g_malloc0(sizeof(struct dev_context));
6513f97f BV	90	sdi->priv = devc;
	91	devc->limit_samples = 0;
	92	devc->data_source = DEFAULT_DATA_SOURCE;
	93	drvc->instances = g_slist_append(drvc->instances, sdi);
	94	devices = g_slist_append(devices, sdi);
	95	}
	96	g_slist_free(usb_devices);
	97	} else
	98	g_slist_free_full(usb_devices, g_free);
3877dde4 BV	99
	100	return devices;
	101	}
	102
4f840ce9	103	static GSList dev_list(const struct sr_dev_driver di)
3877dde4	104	{
45c0841b	105	return ((struct drv_context *)(di->priv))->instances;
3877dde4 BV	106	}
3877dde4 BV	107
3877dde4 BV	108	static int dev_open(struct sr_dev_inst *sdi)
3877dde4 BV	109	{
4f840ce9	110	struct sr_dev_driver *di = sdi->driver;
6513f97f BV	111	struct drv_context *drvc;
	112	struct sr_usb_dev_inst *usb;
	113	int ret;
	114
	115	if (!(drvc = di->priv)) {
	116	sr_err("Driver was not initialized.");
	117	return SR_ERR;
	118	}
	119
	120	usb = sdi->conn;
	121
	122	if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
	123	return SR_ERR;
	124
	125	/*
	126	* The libusbx 1.0.9 darwin backend is broken: it can report a kernel
	127	* driver being active, but detaching it always returns an error.
	128	*/
	129	#if !defined(__APPLE__)
d6ff054a BV	130	if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) {
d6ff054a BV	131	if ((ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE)) < 0) {
6513f97f BV	132	sr_err("failed to detach kernel driver: %s",
	133	libusb_error_name(ret));
	134	return SR_ERR;
	135	}
	136	}
	137	#endif
3877dde4	138
d6ff054a	139	if ((ret = libusb_set_configuration(usb->devhdl, USB_CONFIGURATION))) {
6513f97f BV	140	sr_err("Failed to set configuration: %s.", libusb_error_name(ret));
	141	return SR_ERR;
	142	}
3877dde4	143
6513f97f BV	144	if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE))) {
	145	sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
	146	return SR_ERR;
	147	}
3877dde4 BV	148	sdi->status = SR_ST_ACTIVE;
3877dde4 BV	149
6513f97f	150	return ret;
3877dde4 BV	151	}
	152
	153	static int dev_close(struct sr_dev_inst *sdi)
	154	{
4f840ce9	155	struct sr_dev_driver *di = sdi->driver;
6513f97f	156	struct sr_usb_dev_inst *usb;
3877dde4	157
6513f97f BV	158	if (!di->priv) {
	159	sr_err("Driver was not initialized.");
	160	return SR_ERR;
	161	}
	162
	163	usb = sdi->conn;
	164	if (!usb->devhdl)
	165	/* Nothing to do. */
	166	return SR_OK;
3877dde4	167
6513f97f BV	168	libusb_release_interface(usb->devhdl, USB_INTERFACE);
	169	libusb_close(usb->devhdl);
	170	usb->devhdl = NULL;
3877dde4 BV	171	sdi->status = SR_ST_INACTIVE;
	172
	173	return SR_OK;
	174	}
	175
4f840ce9	176	static int cleanup(const struct sr_dev_driver *di)
3877dde4	177	{
6513f97f BV	178	int ret;
6513f97f BV	179	struct drv_context *drvc;
3877dde4	180
6513f97f BV	181	if (!(drvc = di->priv))
	182	/* Can get called on an unused driver, doesn't matter. */
	183	return SR_OK;
3877dde4	184
a6630742 BV	185
a6630742 BV	186	ret = std_dev_clear(di, NULL);
6513f97f	187	g_free(drvc);
6513f97f BV	188
6513f97f BV	189	return ret;
3877dde4 BV	190	}
3877dde4 BV	191
584560f1	192	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
53b4680f	193	const struct sr_channel_group *cg)
3877dde4	194	{
6513f97f	195	struct dev_context *devc;
3877dde4	196
53b4680f	197	(void)cg;
d3c74a6f	198
6513f97f	199	devc = sdi->priv;
3877dde4	200	switch (key) {
6513f97f BV	201	case SR_CONF_LIMIT_SAMPLES:
	202	*data = g_variant_new_uint64(devc->limit_samples);
	203	break;
	204	case SR_CONF_DATA_SOURCE:
	205	if (devc->data_source == DATA_SOURCE_LIVE)
	206	*data = g_variant_new_string("Live");
	207	else
	208	*data = g_variant_new_string("Memory");
	209	break;
3877dde4 BV	210	default:
	211	return SR_ERR_NA;
	212	}
	213
6513f97f	214	return SR_OK;
3877dde4 BV	215	}
3877dde4 BV	216
584560f1	217	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
53b4680f	218	const struct sr_channel_group *cg)
3877dde4	219	{
4f840ce9	220	struct sr_dev_driver *di = sdi->driver;
6513f97f	221	struct dev_context *devc;
3877dde4	222	int ret;
6513f97f	223	const char *tmp_str;
3877dde4	224
53b4680f	225	(void)cg;
d3c74a6f	226
3877dde4 BV	227	if (sdi->status != SR_ST_ACTIVE)
	228	return SR_ERR_DEV_CLOSED;
	229
6513f97f BV	230	if (!di->priv) {
	231	sr_err("Driver was not initialized.");
	232	return SR_ERR;
	233	}
	234
	235	devc = sdi->priv;
3877dde4 BV	236	ret = SR_OK;
3877dde4 BV	237	switch (key) {
6513f97f BV	238	case SR_CONF_LIMIT_SAMPLES:
	239	devc->limit_samples = g_variant_get_uint64(data);
	240	sr_dbg("Setting sample limit to %" PRIu64 ".",
	241	devc->limit_samples);
	242	break;
	243	case SR_CONF_DATA_SOURCE:
	244	tmp_str = g_variant_get_string(data, NULL);
	245	if (!strcmp(tmp_str, "Live"))
	246	devc->data_source = DATA_SOURCE_LIVE;
	247	else if (!strcmp(tmp_str, "Memory"))
	248	devc->data_source = DATA_SOURCE_MEMORY;
	249	else
	250	return SR_ERR;
	251	break;
3877dde4 BV	252	default:
	253	ret = SR_ERR_NA;
	254	}
	255
	256	return ret;
	257	}
	258
584560f1	259	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
53b4680f	260	const struct sr_channel_group *cg)
3877dde4	261	{
3877dde4 BV	262
3877dde4 BV	263	(void)sdi;
53b4680f	264	(void)cg;
3877dde4	265
3877dde4	266	switch (key) {
6513f97f	267	case SR_CONF_DEVICE_OPTIONS:
584560f1	268	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
f254bc4b	269	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
6513f97f BV	270	break;
	271	case SR_CONF_DATA_SOURCE:
	272	*data = g_variant_new_strv(data_sources, ARRAY_SIZE(data_sources));
	273	break;
3877dde4 BV	274	default:
	275	return SR_ERR_NA;
	276	}
	277
6513f97f	278	return SR_OK;
3877dde4 BV	279	}
	280
	281	static int dev_acquisition_start(const struct sr_dev_inst *sdi,
	282	void *cb_data)
	283	{
4f840ce9	284	struct sr_dev_driver *di = sdi->driver;
6513f97f BV	285	struct drv_context *drvc;
	286	struct dev_context *devc;
	287	struct sr_usb_dev_inst *usb;
6c60facc	288	int len, ret;
6513f97f	289	unsigned char cmd[2];
3877dde4 BV	290
	291	if (sdi->status != SR_ST_ACTIVE)
	292	return SR_ERR_DEV_CLOSED;
	293
6513f97f BV	294	drvc = di->priv;
	295	devc = sdi->priv;
	296	usb = sdi->conn;
	297
	298	devc->cb_data = cb_data;
	299	devc->num_samples = 0;
d6ff054a BV	300	devc->packet_len = 0;
	301
	302	/* Configure serial port parameters on USB-UART interface
	303	* chip inside the device (just baudrate 2400 actually). */
	304	cmd[0] = 0x09;
	305	cmd[1] = 0x60;
	306	ret = libusb_control_transfer(usb->devhdl, 0x21, 0x09, 0x0300, 0x00,
	307	cmd, 2, 5);
	308	if (ret != 2) {
	309	sr_dbg("Failed to configure CH9325: %s", libusb_error_name(ret));
	310	return SR_ERR;
	311	}
6513f97f BV	312
	313	/* Send header packet to the session bus. */
	314	std_session_send_df_header(cb_data, LOG_PREFIX);
	315
	316	if (!(devc->xfer = libusb_alloc_transfer(0)))
	317	return SR_ERR;
	318
6513f97f BV	319	/* Length of payload to follow. */
	320	cmd[0] = 0x01;
	321	if (devc->data_source == DATA_SOURCE_LIVE)
	322	cmd[1] = CMD_GET_LIVE;
	323	else
	324	cmd[1] = CMD_GET_STORED;
	325
	326	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, cmd, 2, &len, 5);
	327	if (ret != 0 \|\| len != 2) {
	328	sr_dbg("Failed to start acquisition: %s", libusb_error_name(ret));
	329	libusb_free_transfer(devc->xfer);
	330	return SR_ERR;
	331	}
	332
	333	libusb_fill_bulk_transfer(devc->xfer, usb->devhdl, EP_IN, devc->buf,
d6ff054a	334	8, uni_t_ut32x_receive_transfer, (void *)sdi, 15);
6513f97f BV	335	if (libusb_submit_transfer(devc->xfer) != 0) {
	336	libusb_free_transfer(devc->xfer);
	337	return SR_ERR;
	338	}
3877dde4	339
102f1239 BV	340	usb_source_add(sdi->session, drvc->sr_ctx, 10,
102f1239 BV	341	uni_t_ut32x_handle_events, (void *)sdi);
d6ff054a	342
3877dde4 BV	343	return SR_OK;
	344	}
	345
	346	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	347	{
d6ff054a	348
3877dde4 BV	349	(void)cb_data;
	350
	351	if (sdi->status != SR_ST_ACTIVE)
	352	return SR_ERR_DEV_CLOSED;
	353
d6ff054a BV	354	/* Signal USB transfer handler to clean up and stop. */
d6ff054a BV	355	sdi->status = SR_ST_STOPPING;
3877dde4 BV	356
	357	return SR_OK;
	358	}
	359
	360	SR_PRIV struct sr_dev_driver uni_t_ut32x_driver_info = {
	361	.name = "uni-t-ut32x",
	362	.longname = "UNI-T UT32x",
	363	.api_version = 1,
	364	.init = init,
	365	.cleanup = cleanup,
	366	.scan = scan,
	367	.dev_list = dev_list,
a6630742	368	.dev_clear = NULL,
3877dde4 BV	369	.config_get = config_get,
	370	.config_set = config_set,
	371	.config_list = config_list,
	372	.dev_open = dev_open,
	373	.dev_close = dev_close,
	374	.dev_acquisition_start = dev_acquisition_start,
	375	.dev_acquisition_stop = dev_acquisition_stop,
	376	.priv = NULL,
	377	};