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