[libsigrok.git] / 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 int32_t hwcaps[] = {
	SR_CONF_THERMOMETER,
	SR_CONF_LIMIT_SAMPLES,
	SR_CONF_CONTINUOUS,
	SR_CONF_DATA_SOURCE,
};

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

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

SR_PRIV struct sr_dev_driver uni_t_ut32x_driver_info;
static struct sr_dev_driver *di = &uni_t_ut32x_driver_info;


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

static GSList *scan(GSList *options)
{
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_dev_inst *sdi;
	struct sr_probe *probe;
	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, USB_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) {
			if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, VENDOR,
					MODEL, NULL)))
				return NULL;
			sdi->driver = di;
			sdi->inst_type = SR_INST_USB;
			sdi->conn = l->data;
			for (i = 0; i < 3; i++) {
				if (!(probe = sr_probe_new(i, SR_PROBE_ANALOG, TRUE,
						probes[i]))) {
					sr_dbg("Probe malloc failed.");
					return NULL;
				}
				sdi->probes = g_slist_append(sdi->probes, probe);
			}

			if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
				sr_dbg("Device context malloc failed.");
				return NULL;
			}
			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(void)
{
	return ((struct drv_context *)(di->priv))->instances;
}

static int dev_clear(void)
{
	return std_dev_clear(di, NULL);
}

static int dev_open(struct sr_dev_inst *sdi)
{
	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_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(void)
{
	int ret;
	struct drv_context *drvc;

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

	ret = dev_clear();
	g_free(drvc);
	di->priv = NULL;

	return ret;
}

static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_probe_group *probe_group)
{
	struct dev_context *devc;

	(void)probe_group;

	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(int key, GVariant *data, const struct sr_dev_inst *sdi,
		const struct sr_probe_group *probe_group)
{
	struct dev_context *devc;
	int ret;
	const char *tmp_str;

	(void)probe_group;

	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(int key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_probe_group *probe_group)
{

	(void)sdi;
	(void)probe_group;

	switch (key) {
	case SR_CONF_DEVICE_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
				hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_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 drv_context *drvc;
	struct dev_context *devc;
	struct sr_usb_dev_inst *usb;
	const struct libusb_pollfd **pfd;
	int len, ret, i;
	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;
	}

	pfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
	for (i = 0; pfd[i]; i++) {
		/* Handle USB events every 10ms. */
		sr_source_add(pfd[i]->fd, pfd[i]->events, 10,
				uni_t_ut32x_handle_events, (void *)sdi);
		/* We'll need to remove this fd later. */
		devc->usbfd[i] = pfd[i]->fd;
	}
	devc->usbfd[i] = -1;

	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 = 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
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
6513f97f BV	24	static const int32_t hwcaps[] = {
	25	SR_CONF_THERMOMETER,
	26	SR_CONF_LIMIT_SAMPLES,
	27	SR_CONF_CONTINUOUS,
	28	SR_CONF_DATA_SOURCE,
	29	};
	30
	31	static char *probes[] = {
	32	"T1",
	33	"T2",
	34	"T1-T2",
	35	};
	36
	37	static const char *data_sources[] = {
	38	"Live",
	39	"Memory",
	40	};
	41
3877dde4 BV	42	SR_PRIV struct sr_dev_driver uni_t_ut32x_driver_info;
	43	static struct sr_dev_driver *di = &uni_t_ut32x_driver_info;
	44
	45
	46	static int init(struct sr_context *sr_ctx)
	47	{
	48	return std_init(sr_ctx, di, LOG_PREFIX);
	49	}
	50
	51	static GSList scan(GSList options)
	52	{
	53	struct drv_context *drvc;
6513f97f BV	54	struct dev_context *devc;
	55	struct sr_dev_inst *sdi;
	56	struct sr_probe *probe;
	57	struct sr_config *src;
	58	GSList usb_devices, devices, *l;
	59	int i;
	60	const char *conn;
3877dde4	61
3877dde4 BV	62	drvc = di->priv;
	63	drvc->instances = NULL;
	64
6513f97f BV	65	conn = NULL;
	66	for (l = options; l; l = l->next) {
	67	src = l->data;
	68	switch (src->key) {
	69	case SR_CONF_CONN:
	70	conn = g_variant_get_string(src->data, NULL);
	71	break;
	72	}
	73	}
	74	if (!conn)
	75	return NULL;
	76
	77	devices = NULL;
	78	if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, USB_CONN))) {
	79	/* We have a list of sr_usb_dev_inst matching the connection
	80	* string. Wrap them in sr_dev_inst and we're done. */
	81	for (l = usb_devices; l; l = l->next) {
	82	if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, VENDOR,
	83	MODEL, NULL)))
	84	return NULL;
	85	sdi->driver = di;
	86	sdi->inst_type = SR_INST_USB;
	87	sdi->conn = l->data;
	88	for (i = 0; i < 3; i++) {
	89	if (!(probe = sr_probe_new(i, SR_PROBE_ANALOG, TRUE,
	90	probes[i]))) {
	91	sr_dbg("Probe malloc failed.");
	92	return NULL;
	93	}
	94	sdi->probes = g_slist_append(sdi->probes, probe);
	95	}
	96
	97	if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
	98	sr_dbg("Device context malloc failed.");
	99	return NULL;
	100	}
	101	sdi->priv = devc;
	102	devc->limit_samples = 0;
	103	devc->data_source = DEFAULT_DATA_SOURCE;
	104	drvc->instances = g_slist_append(drvc->instances, sdi);
	105	devices = g_slist_append(devices, sdi);
	106	}
	107	g_slist_free(usb_devices);
	108	} else
	109	g_slist_free_full(usb_devices, g_free);
3877dde4 BV	110
	111	return devices;
	112	}
	113
	114	static GSList *dev_list(void)
	115	{
45c0841b	116	return ((struct drv_context *)(di->priv))->instances;
3877dde4 BV	117	}
	118
	119	static int dev_clear(void)
	120	{
	121	return std_dev_clear(di, NULL);
	122	}
	123
	124	static int dev_open(struct sr_dev_inst *sdi)
	125	{
6513f97f BV	126	struct drv_context *drvc;
	127	struct sr_usb_dev_inst *usb;
	128	int ret;
	129
	130	if (!(drvc = di->priv)) {
	131	sr_err("Driver was not initialized.");
	132	return SR_ERR;
	133	}
	134
	135	usb = sdi->conn;
	136
	137	if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
	138	return SR_ERR;
	139
	140	/*
	141	* The libusbx 1.0.9 darwin backend is broken: it can report a kernel
	142	* driver being active, but detaching it always returns an error.
	143	*/
	144	#if !defined(__APPLE__)
d6ff054a BV	145	if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) {
d6ff054a BV	146	if ((ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE)) < 0) {
6513f97f BV	147	sr_err("failed to detach kernel driver: %s",
	148	libusb_error_name(ret));
	149	return SR_ERR;
	150	}
	151	}
	152	#endif
3877dde4	153
d6ff054a	154	if ((ret = libusb_set_configuration(usb->devhdl, USB_CONFIGURATION))) {
6513f97f BV	155	sr_err("Failed to set configuration: %s.", libusb_error_name(ret));
	156	return SR_ERR;
	157	}
3877dde4	158
6513f97f BV	159	if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE))) {
	160	sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
	161	return SR_ERR;
	162	}
3877dde4 BV	163	sdi->status = SR_ST_ACTIVE;
3877dde4 BV	164
6513f97f	165	return ret;
3877dde4 BV	166	}
	167
	168	static int dev_close(struct sr_dev_inst *sdi)
	169	{
6513f97f	170	struct sr_usb_dev_inst *usb;
3877dde4	171
6513f97f BV	172	if (!di->priv) {
	173	sr_err("Driver was not initialized.");
	174	return SR_ERR;
	175	}
	176
	177	usb = sdi->conn;
	178	if (!usb->devhdl)
	179	/* Nothing to do. */
	180	return SR_OK;
3877dde4	181
6513f97f BV	182	libusb_release_interface(usb->devhdl, USB_INTERFACE);
	183	libusb_close(usb->devhdl);
	184	usb->devhdl = NULL;
3877dde4 BV	185	sdi->status = SR_ST_INACTIVE;
	186
	187	return SR_OK;
	188	}
	189
	190	static int cleanup(void)
	191	{
6513f97f BV	192	int ret;
6513f97f BV	193	struct drv_context *drvc;
3877dde4	194
6513f97f BV	195	if (!(drvc = di->priv))
	196	/* Can get called on an unused driver, doesn't matter. */
	197	return SR_OK;
3877dde4	198
6513f97f BV	199	ret = dev_clear();
	200	g_free(drvc);
	201	di->priv = NULL;
	202
	203	return ret;
3877dde4 BV	204	}
3877dde4 BV	205
d3c74a6f BV	206	static int config_get(int key, GVariant *data, const struct sr_dev_inst sdi,
d3c74a6f BV	207	const struct sr_probe_group *probe_group)
3877dde4	208	{
6513f97f	209	struct dev_context *devc;
3877dde4	210
d3c74a6f BV	211	(void)probe_group;
d3c74a6f BV	212
6513f97f	213	devc = sdi->priv;
3877dde4	214	switch (key) {
6513f97f BV	215	case SR_CONF_LIMIT_SAMPLES:
	216	*data = g_variant_new_uint64(devc->limit_samples);
	217	break;
	218	case SR_CONF_DATA_SOURCE:
	219	if (devc->data_source == DATA_SOURCE_LIVE)
	220	*data = g_variant_new_string("Live");
	221	else
	222	*data = g_variant_new_string("Memory");
	223	break;
3877dde4 BV	224	default:
	225	return SR_ERR_NA;
	226	}
	227
6513f97f	228	return SR_OK;
3877dde4 BV	229	}
3877dde4 BV	230
d3c74a6f BV	231	static int config_set(int key, GVariant data, const struct sr_dev_inst sdi,
d3c74a6f BV	232	const struct sr_probe_group *probe_group)
3877dde4	233	{
6513f97f	234	struct dev_context *devc;
3877dde4	235	int ret;
6513f97f	236	const char *tmp_str;
3877dde4	237
d3c74a6f BV	238	(void)probe_group;
d3c74a6f BV	239
3877dde4 BV	240	if (sdi->status != SR_ST_ACTIVE)
	241	return SR_ERR_DEV_CLOSED;
	242
6513f97f BV	243	if (!di->priv) {
	244	sr_err("Driver was not initialized.");
	245	return SR_ERR;
	246	}
	247
	248	devc = sdi->priv;
3877dde4 BV	249	ret = SR_OK;
3877dde4 BV	250	switch (key) {
6513f97f BV	251	case SR_CONF_LIMIT_SAMPLES:
	252	devc->limit_samples = g_variant_get_uint64(data);
	253	sr_dbg("Setting sample limit to %" PRIu64 ".",
	254	devc->limit_samples);
	255	break;
	256	case SR_CONF_DATA_SOURCE:
	257	tmp_str = g_variant_get_string(data, NULL);
	258	if (!strcmp(tmp_str, "Live"))
	259	devc->data_source = DATA_SOURCE_LIVE;
	260	else if (!strcmp(tmp_str, "Memory"))
	261	devc->data_source = DATA_SOURCE_MEMORY;
	262	else
	263	return SR_ERR;
	264	break;
3877dde4 BV	265	default:
	266	ret = SR_ERR_NA;
	267	}
	268
	269	return ret;
	270	}
	271
d3c74a6f BV	272	static int config_list(int key, GVariant *data, const struct sr_dev_inst sdi,
d3c74a6f BV	273	const struct sr_probe_group *probe_group)
3877dde4	274	{
3877dde4 BV	275
3877dde4 BV	276	(void)sdi;
d3c74a6f	277	(void)probe_group;
3877dde4	278
3877dde4	279	switch (key) {
6513f97f BV	280	case SR_CONF_DEVICE_OPTIONS:
	281	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	282	hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
	283	break;
	284	case SR_CONF_DATA_SOURCE:
	285	*data = g_variant_new_strv(data_sources, ARRAY_SIZE(data_sources));
	286	break;
3877dde4 BV	287	default:
	288	return SR_ERR_NA;
	289	}
	290
6513f97f	291	return SR_OK;
3877dde4 BV	292	}
	293
	294	static int dev_acquisition_start(const struct sr_dev_inst *sdi,
	295	void *cb_data)
	296	{
6513f97f BV	297	struct drv_context *drvc;
	298	struct dev_context *devc;
	299	struct sr_usb_dev_inst *usb;
	300	const struct libusb_pollfd **pfd;
	301	int len, ret, i;
	302	unsigned char cmd[2];
3877dde4 BV	303
	304	if (sdi->status != SR_ST_ACTIVE)
	305	return SR_ERR_DEV_CLOSED;
	306
6513f97f BV	307	drvc = di->priv;
	308	devc = sdi->priv;
	309	usb = sdi->conn;
	310
	311	devc->cb_data = cb_data;
	312	devc->num_samples = 0;
d6ff054a BV	313	devc->packet_len = 0;
	314
	315	/* Configure serial port parameters on USB-UART interface
	316	* chip inside the device (just baudrate 2400 actually). */
	317	cmd[0] = 0x09;
	318	cmd[1] = 0x60;
	319	ret = libusb_control_transfer(usb->devhdl, 0x21, 0x09, 0x0300, 0x00,
	320	cmd, 2, 5);
	321	if (ret != 2) {
	322	sr_dbg("Failed to configure CH9325: %s", libusb_error_name(ret));
	323	return SR_ERR;
	324	}
6513f97f BV	325
	326	/* Send header packet to the session bus. */
	327	std_session_send_df_header(cb_data, LOG_PREFIX);
	328
	329	if (!(devc->xfer = libusb_alloc_transfer(0)))
	330	return SR_ERR;
	331
6513f97f BV	332	/* Length of payload to follow. */
	333	cmd[0] = 0x01;
	334	if (devc->data_source == DATA_SOURCE_LIVE)
	335	cmd[1] = CMD_GET_LIVE;
	336	else
	337	cmd[1] = CMD_GET_STORED;
	338
	339	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, cmd, 2, &len, 5);
	340	if (ret != 0 \|\| len != 2) {
	341	sr_dbg("Failed to start acquisition: %s", libusb_error_name(ret));
	342	libusb_free_transfer(devc->xfer);
	343	return SR_ERR;
	344	}
	345
	346	libusb_fill_bulk_transfer(devc->xfer, usb->devhdl, EP_IN, devc->buf,
d6ff054a	347	8, uni_t_ut32x_receive_transfer, (void *)sdi, 15);
6513f97f BV	348	if (libusb_submit_transfer(devc->xfer) != 0) {
	349	libusb_free_transfer(devc->xfer);
	350	return SR_ERR;
	351	}
3877dde4	352
d6ff054a BV	353	pfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
	354	for (i = 0; pfd[i]; i++) {
	355	/* Handle USB events every 10ms. */
	356	sr_source_add(pfd[i]->fd, pfd[i]->events, 10,
	357	uni_t_ut32x_handle_events, (void *)sdi);
	358	/* We'll need to remove this fd later. */
	359	devc->usbfd[i] = pfd[i]->fd;
	360	}
	361	devc->usbfd[i] = -1;
	362
3877dde4 BV	363	return SR_OK;
	364	}
	365
	366	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	367	{
d6ff054a	368
3877dde4 BV	369	(void)cb_data;
	370
	371	if (sdi->status != SR_ST_ACTIVE)
	372	return SR_ERR_DEV_CLOSED;
	373
d6ff054a BV	374	/* Signal USB transfer handler to clean up and stop. */
d6ff054a BV	375	sdi->status = SR_ST_STOPPING;
3877dde4 BV	376
	377	return SR_OK;
	378	}
	379
	380	SR_PRIV struct sr_dev_driver uni_t_ut32x_driver_info = {
	381	.name = "uni-t-ut32x",
	382	.longname = "UNI-T UT32x",
	383	.api_version = 1,
	384	.init = init,
	385	.cleanup = cleanup,
	386	.scan = scan,
	387	.dev_list = dev_list,
	388	.dev_clear = dev_clear,
	389	.config_get = config_get,
	390	.config_set = config_set,
	391	.config_list = config_list,
	392	.dev_open = dev_open,
	393	.dev_close = dev_close,
	394	.dev_acquisition_start = dev_acquisition_start,
	395	.dev_acquisition_stop = dev_acquisition_stop,
	396	.priv = NULL,
	397	};