[libsigrok.git] / src / hardware / ikalogic-scanaplus / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2013 Uwe Hermann <uwe@hermann-uwe.de>
 *
 * 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 2 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 <config.h>
#include "protocol.h"

#define USB_VENDOR_ID			0x0403
#define USB_DEVICE_ID			0x6014
#define USB_VENDOR_NAME			"IKALOGIC"
#define USB_MODEL_NAME			"ScanaPLUS"
#define USB_IPRODUCT			"SCANAPLUS"

#define SAMPLE_BUF_SIZE			(8 * 1024 * 1024)

static const uint32_t devopts[] = {
	SR_CONF_LOGIC_ANALYZER,
	SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
	SR_CONF_LIMIT_MSEC | SR_CONF_SET,
	SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
};

/* Channels are numbered 1-9. */
static const char *channel_names[] = {
	"1", "2", "3", "4", "5", "6", "7", "8", "9",
};

/* Note: The IKALOGIC ScanaPLUS always samples at 100MHz. */
static const uint64_t samplerates[1] = { SR_MHZ(100) };

static void clear_helper(void *priv)
{
	struct dev_context *devc;

	devc = priv;

	ftdi_free(devc->ftdic);
	g_free(devc->compressed_buf);
	g_free(devc->sample_buf);
}

static int dev_clear(const struct sr_dev_driver *di)
{
	return std_dev_clear_with_callback(di, clear_helper);
}

static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	unsigned int i;
	int ret;

	(void)options;

	/* Allocate memory for our private device context. */
	devc = g_malloc0(sizeof(struct dev_context));

	/* Allocate memory for the incoming compressed samples. */
	if (!(devc->compressed_buf = g_try_malloc0(COMPRESSED_BUF_SIZE))) {
		sr_err("compressed_buf malloc failed.");
		goto err_free_devc;
	}

	/* Allocate memory for the uncompressed samples. */
	if (!(devc->sample_buf = g_try_malloc0(SAMPLE_BUF_SIZE))) {
		sr_err("sample_buf malloc failed.");
		goto err_free_compressed_buf;
	}

	/* Allocate memory for the FTDI context (ftdic) and initialize it. */
	if (!(devc->ftdic = ftdi_new())) {
		sr_err("Failed to initialize libftdi.");
		goto err_free_sample_buf;
	}

	/* Check for the device and temporarily open it. */
	ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID,
				 USB_IPRODUCT, NULL);
	if (ret < 0) {
		/* Log errors, except for -3 ("device not found"). */
		if (ret != -3)
			sr_err("Failed to open device (%d): %s", ret,
			       ftdi_get_error_string(devc->ftdic));
		goto err_free_ftdic;
	}

	/* Register the device with libsigrok. */
	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	sdi->status = SR_ST_INACTIVE;
	sdi->vendor = g_strdup(USB_VENDOR_NAME);
	sdi->model = g_strdup(USB_MODEL_NAME);
	sdi->priv = devc;

	for (i = 0; i < ARRAY_SIZE(channel_names); i++)
		sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, channel_names[i]);

	/* Close device. We'll reopen it again when we need it. */
	scanaplus_close(devc);

	return std_scan_complete(di, g_slist_append(NULL, sdi));

	scanaplus_close(devc);
err_free_ftdic:
	ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
err_free_sample_buf:
	g_free(devc->sample_buf);
err_free_compressed_buf:
	g_free(devc->compressed_buf);
err_free_devc:
	g_free(devc);

	return NULL;
}

static int dev_open(struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	int ret;

	devc = sdi->priv;

	/* Select interface A, otherwise communication will fail. */
	ret = ftdi_set_interface(devc->ftdic, INTERFACE_A);
	if (ret < 0) {
		sr_err("Failed to set FTDI interface A (%d): %s", ret,
		       ftdi_get_error_string(devc->ftdic));
		return SR_ERR;
	}

	/* Open the device. */
	ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID,
				 USB_IPRODUCT, NULL);
	if (ret < 0) {
		sr_err("Failed to open device (%d): %s", ret,
		       ftdi_get_error_string(devc->ftdic));
		return SR_ERR;
	}

	/* Purge RX/TX buffers in the FTDI chip. */
	if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
		sr_err("Failed to purge FTDI RX/TX buffers (%d): %s.",
		       ret, ftdi_get_error_string(devc->ftdic));
		goto err_dev_open_close_ftdic;
	}

	/* Reset the FTDI bitmode. */
	ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_RESET);
	if (ret < 0) {
		sr_err("Failed to reset the FTDI chip bitmode (%d): %s.",
		       ret, ftdi_get_error_string(devc->ftdic));
		goto err_dev_open_close_ftdic;
	}

	/* Set FTDI bitmode to "sync FIFO". */
	ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_SYNCFF);
	if (ret < 0) {
		sr_err("Failed to put FTDI chip into sync FIFO mode (%d): %s.",
		       ret, ftdi_get_error_string(devc->ftdic));
		goto err_dev_open_close_ftdic;
	}

	/* Set the FTDI latency timer to 2. */
	ret = ftdi_set_latency_timer(devc->ftdic, 2);
	if (ret < 0) {
		sr_err("Failed to set FTDI latency timer (%d): %s.",
		       ret, ftdi_get_error_string(devc->ftdic));
		goto err_dev_open_close_ftdic;
	}

	/* Set the FTDI read data chunk size to 64kB. */
	ret = ftdi_read_data_set_chunksize(devc->ftdic, 64 * 1024);
	if (ret < 0) {
		sr_err("Failed to set FTDI read data chunk size (%d): %s.",
		       ret, ftdi_get_error_string(devc->ftdic));
		goto err_dev_open_close_ftdic;
	}

	/* Get the ScanaPLUS device ID from the FTDI EEPROM. */
	if ((ret = scanaplus_get_device_id(devc)) < 0) {
		sr_err("Failed to get ScanaPLUS device ID: %d.", ret);
		goto err_dev_open_close_ftdic;
	}
	sr_dbg("Received ScanaPLUS device ID successfully: %02x %02x %02x.",
	       devc->devid[0], devc->devid[1], devc->devid[2]);

	return SR_OK;

err_dev_open_close_ftdic:
	scanaplus_close(devc);

	return SR_ERR;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	struct dev_context *devc;

	devc = sdi->priv;

	return scanaplus_close(devc);
}

static int config_get(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_SAMPLERATE:
		/* The ScanaPLUS samplerate is 100MHz and can't be changed. */
		*data = g_variant_new_uint64(SR_MHZ(100));
		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 dev_context *devc;

	(void)cg;

	devc = sdi->priv;

	switch (key) {
	case SR_CONF_SAMPLERATE:
		if (g_variant_get_uint64(data) != SR_MHZ(100)) {
			sr_err("ScanaPLUS only supports samplerate = 100MHz.");
			return SR_ERR_ARG;
		}
		/* Nothing to do, the ScanaPLUS samplerate is always 100MHz. */
		break;
	case SR_CONF_LIMIT_MSEC:
		if (g_variant_get_uint64(data) == 0)
			return SR_ERR_ARG;
		devc->limit_msec = g_variant_get_uint64(data);
		break;
	case SR_CONF_LIMIT_SAMPLES:
		if (g_variant_get_uint64(data) == 0)
			return SR_ERR_ARG;
		devc->limit_samples = g_variant_get_uint64(data);
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

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

	(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_SAMPLERATE:
		g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
		gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
				samplerates, ARRAY_SIZE(samplerates),
				sizeof(uint64_t));
		g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
		*data = g_variant_builder_end(&gvb);
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi)
{
	int ret;
	struct dev_context *devc;

	devc = sdi->priv;

	if (!devc->ftdic)
		return SR_ERR_BUG;

	/* TODO: Configure channels later (thresholds etc.). */

	/* Properly reset internal variables before every new acquisition. */
	devc->compressed_bytes_ignored = 0;
	devc->samples_sent = 0;
	devc->bytes_received = 0;

	if ((ret = scanaplus_init(devc)) < 0)
		return ret;

	if ((ret = scanaplus_start_acquisition(devc)) < 0)
		return ret;

	std_session_send_df_header(sdi);

	/* Hook up a dummy handler to receive data from the device. */
	sr_session_source_add(sdi->session, -1, 0, 0, scanaplus_receive_data, (void *)sdi);

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
	sr_session_source_remove(sdi->session, -1);
	std_session_send_df_end(sdi);

	return SR_OK;
}

static struct sr_dev_driver ikalogic_scanaplus_driver_info = {
	.name = "ikalogic-scanaplus",
	.longname = "IKALOGIC ScanaPLUS",
	.api_version = 1,
	.init = std_init,
	.cleanup = std_cleanup,
	.scan = scan,
	.dev_list = std_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,
	.context = NULL,
};
SR_REGISTER_DEV_DRIVER(ikalogic_scanaplus_driver_info);
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2013 Uwe Hermann <uwe@hermann-uwe.de>
	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 2 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 <config.h>
	21	#include "protocol.h"
	22
	23	#define USB_VENDOR_ID 0x0403
	24	#define USB_DEVICE_ID 0x6014
	25	#define USB_VENDOR_NAME "IKALOGIC"
	26	#define USB_MODEL_NAME "ScanaPLUS"
	27	#define USB_IPRODUCT "SCANAPLUS"
	28
	29	#define SAMPLE_BUF_SIZE (8 * 1024 * 1024)
	30
	31	static const uint32_t devopts[] = {
	32	SR_CONF_LOGIC_ANALYZER,
	33	SR_CONF_LIMIT_SAMPLES \| SR_CONF_SET,
	34	SR_CONF_LIMIT_MSEC \| SR_CONF_SET,
	35	SR_CONF_SAMPLERATE \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	36	};
	37
	38	/* Channels are numbered 1-9. */
	39	static const char *channel_names[] = {
	40	"1", "2", "3", "4", "5", "6", "7", "8", "9",
	41	};
	42
	43	/* Note: The IKALOGIC ScanaPLUS always samples at 100MHz. */
	44	static const uint64_t samplerates[1] = { SR_MHZ(100) };
	45
	46	static void clear_helper(void *priv)
	47	{
	48	struct dev_context *devc;
	49
	50	devc = priv;
	51
	52	ftdi_free(devc->ftdic);
	53	g_free(devc->compressed_buf);
	54	g_free(devc->sample_buf);
	55	}
	56
	57	static int dev_clear(const struct sr_dev_driver *di)
	58	{
	59	return std_dev_clear_with_callback(di, clear_helper);
	60	}
	61
	62	static GSList scan(struct sr_dev_driver di, GSList *options)
	63	{
	64	struct sr_dev_inst *sdi;
	65	struct dev_context *devc;
	66	unsigned int i;
	67	int ret;
	68
	69	(void)options;
	70
	71	/* Allocate memory for our private device context. */
	72	devc = g_malloc0(sizeof(struct dev_context));
	73
	74	/* Allocate memory for the incoming compressed samples. */
	75	if (!(devc->compressed_buf = g_try_malloc0(COMPRESSED_BUF_SIZE))) {
	76	sr_err("compressed_buf malloc failed.");
	77	goto err_free_devc;
	78	}
	79
	80	/* Allocate memory for the uncompressed samples. */
	81	if (!(devc->sample_buf = g_try_malloc0(SAMPLE_BUF_SIZE))) {
	82	sr_err("sample_buf malloc failed.");
	83	goto err_free_compressed_buf;
	84	}
	85
	86	/* Allocate memory for the FTDI context (ftdic) and initialize it. */
	87	if (!(devc->ftdic = ftdi_new())) {
	88	sr_err("Failed to initialize libftdi.");
	89	goto err_free_sample_buf;
	90	}
	91
	92	/* Check for the device and temporarily open it. */
	93	ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID,
	94	USB_IPRODUCT, NULL);
	95	if (ret < 0) {
	96	/* Log errors, except for -3 ("device not found"). */
	97	if (ret != -3)
	98	sr_err("Failed to open device (%d): %s", ret,
	99	ftdi_get_error_string(devc->ftdic));
	100	goto err_free_ftdic;
	101	}
	102
	103	/* Register the device with libsigrok. */
	104	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	105	sdi->status = SR_ST_INACTIVE;
	106	sdi->vendor = g_strdup(USB_VENDOR_NAME);
	107	sdi->model = g_strdup(USB_MODEL_NAME);
	108	sdi->priv = devc;
	109
	110	for (i = 0; i < ARRAY_SIZE(channel_names); i++)
	111	sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, channel_names[i]);
	112
	113	/* Close device. We'll reopen it again when we need it. */
	114	scanaplus_close(devc);
	115
	116	return std_scan_complete(di, g_slist_append(NULL, sdi));
	117
	118	scanaplus_close(devc);
	119	err_free_ftdic:
	120	ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
	121	err_free_sample_buf:
	122	g_free(devc->sample_buf);
	123	err_free_compressed_buf:
	124	g_free(devc->compressed_buf);
	125	err_free_devc:
	126	g_free(devc);
	127
	128	return NULL;
	129	}
	130
	131	static int dev_open(struct sr_dev_inst *sdi)
	132	{
	133	struct dev_context *devc;
	134	int ret;
	135
	136	devc = sdi->priv;
	137
	138	/* Select interface A, otherwise communication will fail. */
	139	ret = ftdi_set_interface(devc->ftdic, INTERFACE_A);
	140	if (ret < 0) {
	141	sr_err("Failed to set FTDI interface A (%d): %s", ret,
	142	ftdi_get_error_string(devc->ftdic));
	143	return SR_ERR;
	144	}
	145
	146	/* Open the device. */
	147	ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID,
	148	USB_IPRODUCT, NULL);
	149	if (ret < 0) {
	150	sr_err("Failed to open device (%d): %s", ret,
	151	ftdi_get_error_string(devc->ftdic));
	152	return SR_ERR;
	153	}
	154
	155	/* Purge RX/TX buffers in the FTDI chip. */
	156	if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
	157	sr_err("Failed to purge FTDI RX/TX buffers (%d): %s.",
	158	ret, ftdi_get_error_string(devc->ftdic));
	159	goto err_dev_open_close_ftdic;
	160	}
	161
	162	/* Reset the FTDI bitmode. */
	163	ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_RESET);
	164	if (ret < 0) {
	165	sr_err("Failed to reset the FTDI chip bitmode (%d): %s.",
	166	ret, ftdi_get_error_string(devc->ftdic));
	167	goto err_dev_open_close_ftdic;
	168	}
	169
	170	/* Set FTDI bitmode to "sync FIFO". */
	171	ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_SYNCFF);
	172	if (ret < 0) {
	173	sr_err("Failed to put FTDI chip into sync FIFO mode (%d): %s.",
	174	ret, ftdi_get_error_string(devc->ftdic));
	175	goto err_dev_open_close_ftdic;
	176	}
	177
	178	/* Set the FTDI latency timer to 2. */
	179	ret = ftdi_set_latency_timer(devc->ftdic, 2);
	180	if (ret < 0) {
	181	sr_err("Failed to set FTDI latency timer (%d): %s.",
	182	ret, ftdi_get_error_string(devc->ftdic));
	183	goto err_dev_open_close_ftdic;
	184	}
	185
	186	/* Set the FTDI read data chunk size to 64kB. */
	187	ret = ftdi_read_data_set_chunksize(devc->ftdic, 64 * 1024);
	188	if (ret < 0) {
	189	sr_err("Failed to set FTDI read data chunk size (%d): %s.",
	190	ret, ftdi_get_error_string(devc->ftdic));
	191	goto err_dev_open_close_ftdic;
	192	}
	193
	194	/* Get the ScanaPLUS device ID from the FTDI EEPROM. */
	195	if ((ret = scanaplus_get_device_id(devc)) < 0) {
	196	sr_err("Failed to get ScanaPLUS device ID: %d.", ret);
	197	goto err_dev_open_close_ftdic;
	198	}
	199	sr_dbg("Received ScanaPLUS device ID successfully: %02x %02x %02x.",
	200	devc->devid[0], devc->devid[1], devc->devid[2]);
	201
	202	return SR_OK;
	203
	204	err_dev_open_close_ftdic:
	205	scanaplus_close(devc);
	206
	207	return SR_ERR;
	208	}
	209
	210	static int dev_close(struct sr_dev_inst *sdi)
	211	{
	212	struct dev_context *devc;
	213
	214	devc = sdi->priv;
	215
	216	return scanaplus_close(devc);
	217	}
	218
	219	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	220	const struct sr_channel_group *cg)
	221	{
	222	(void)sdi;
	223	(void)cg;
	224
	225	switch (key) {
	226	case SR_CONF_SAMPLERATE:
	227	/* The ScanaPLUS samplerate is 100MHz and can't be changed. */
	228	*data = g_variant_new_uint64(SR_MHZ(100));
	229	break;
	230	default:
	231	return SR_ERR_NA;
	232	}
	233
	234	return SR_OK;
	235	}
	236
	237	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
	238	const struct sr_channel_group *cg)
	239	{
	240	struct dev_context *devc;
	241
	242	(void)cg;
	243
	244	devc = sdi->priv;
	245
	246	switch (key) {
	247	case SR_CONF_SAMPLERATE:
	248	if (g_variant_get_uint64(data) != SR_MHZ(100)) {
	249	sr_err("ScanaPLUS only supports samplerate = 100MHz.");
	250	return SR_ERR_ARG;
	251	}
	252	/* Nothing to do, the ScanaPLUS samplerate is always 100MHz. */
	253	break;
	254	case SR_CONF_LIMIT_MSEC:
	255	if (g_variant_get_uint64(data) == 0)
	256	return SR_ERR_ARG;
	257	devc->limit_msec = g_variant_get_uint64(data);
	258	break;
	259	case SR_CONF_LIMIT_SAMPLES:
	260	if (g_variant_get_uint64(data) == 0)
	261	return SR_ERR_ARG;
	262	devc->limit_samples = g_variant_get_uint64(data);
	263	break;
	264	default:
	265	return SR_ERR_NA;
	266	}
	267
	268	return SR_OK;
	269	}
	270
	271	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	272	const struct sr_channel_group *cg)
	273	{
	274	GVariant *gvar;
	275	GVariantBuilder gvb;
	276
	277	(void)sdi;
	278	(void)cg;
	279
	280	switch (key) {
	281	case SR_CONF_DEVICE_OPTIONS:
	282	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	283	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
	284	break;
	285	case SR_CONF_SAMPLERATE:
	286	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	287	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
	288	samplerates, ARRAY_SIZE(samplerates),
	289	sizeof(uint64_t));
	290	g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
	291	*data = g_variant_builder_end(&gvb);
	292	break;
	293	default:
	294	return SR_ERR_NA;
	295	}
	296
	297	return SR_OK;
	298	}
	299
	300	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
	301	{
	302	int ret;
	303	struct dev_context *devc;
	304
	305	devc = sdi->priv;
	306
	307	if (!devc->ftdic)
	308	return SR_ERR_BUG;
	309
	310	/* TODO: Configure channels later (thresholds etc.). */
	311
	312	/* Properly reset internal variables before every new acquisition. */
	313	devc->compressed_bytes_ignored = 0;
	314	devc->samples_sent = 0;
	315	devc->bytes_received = 0;
	316
	317	if ((ret = scanaplus_init(devc)) < 0)
	318	return ret;
	319
	320	if ((ret = scanaplus_start_acquisition(devc)) < 0)
	321	return ret;
	322
	323	std_session_send_df_header(sdi);
	324
	325	/* Hook up a dummy handler to receive data from the device. */
	326	sr_session_source_add(sdi->session, -1, 0, 0, scanaplus_receive_data, (void *)sdi);
	327
	328	return SR_OK;
	329	}
	330
	331	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
	332	{
	333	sr_session_source_remove(sdi->session, -1);
	334	std_session_send_df_end(sdi);
	335
	336	return SR_OK;
	337	}
	338
	339	static struct sr_dev_driver ikalogic_scanaplus_driver_info = {
	340	.name = "ikalogic-scanaplus",
	341	.longname = "IKALOGIC ScanaPLUS",
	342	.api_version = 1,
	343	.init = std_init,
	344	.cleanup = std_cleanup,
	345	.scan = scan,
	346	.dev_list = std_dev_list,
	347	.dev_clear = dev_clear,
	348	.config_get = config_get,
	349	.config_set = config_set,
	350	.config_list = config_list,
	351	.dev_open = dev_open,
	352	.dev_close = dev_close,
	353	.dev_acquisition_start = dev_acquisition_start,
	354	.dev_acquisition_stop = dev_acquisition_stop,
	355	.context = NULL,
	356	};
	357	SR_REGISTER_DEV_DRIVER(ikalogic_scanaplus_driver_info);