[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 int dev_acquisition_stop(struct sr_dev_inst *sdi);

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);
	g_free(devc);
}

static int dev_clear(const struct sr_dev_driver *di)
{
	return std_dev_clear(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;
	}
	sr_dbg("FTDI chip interface A set successfully.");

	/* 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;
	}
	sr_dbg("FTDI device opened successfully.");

	/* 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;
	}
	sr_dbg("FTDI chip buffers purged successfully.");

	/* 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;
	}
	sr_dbg("FTDI chip bitmode reset successfully.");

	/* 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;
	}
	sr_dbg("FTDI chip sync FIFO mode entered successfully.");

	/* 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;
	}
	sr_dbg("FTDI chip latency timer set successfully.");

	/* 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;
	}
	sr_dbg("FTDI chip read data chunk size set successfully.");

	/* 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]);

	sdi->status = SR_ST_ACTIVE;

	return SR_OK;

err_dev_open_close_ftdic:
	scanaplus_close(devc);
	return SR_ERR;
}

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

	ret = SR_OK;
	devc = sdi->priv;

	if (sdi->status == SR_ST_ACTIVE) {
		sr_dbg("Status ACTIVE, closing device.");
		ret = scanaplus_close(devc);
	} else {
		sr_spew("Status not ACTIVE, nothing to do.");
	}

	sdi->status = SR_ST_INACTIVE;

	return ret;
}

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;

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

	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;

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

	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_dbg("Stopping acquisition.");
	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 int dev_acquisition_stop(struct sr_dev_inst *sdi);
	47
	48	static void clear_helper(void *priv)
	49	{
	50	struct dev_context *devc;
	51
	52	devc = priv;
	53
	54	ftdi_free(devc->ftdic);
	55	g_free(devc->compressed_buf);
	56	g_free(devc->sample_buf);
	57	g_free(devc);
	58	}
	59
	60	static int dev_clear(const struct sr_dev_driver *di)
	61	{
	62	return std_dev_clear(di, clear_helper);
	63	}
	64
	65	static GSList scan(struct sr_dev_driver di, GSList *options)
	66	{
	67	struct sr_dev_inst *sdi;
	68	struct dev_context *devc;
	69	unsigned int i;
	70	int ret;
	71
	72	(void)options;
	73
	74	/* Allocate memory for our private device context. */
	75	devc = g_malloc0(sizeof(struct dev_context));
	76
	77	/* Allocate memory for the incoming compressed samples. */
	78	if (!(devc->compressed_buf = g_try_malloc0(COMPRESSED_BUF_SIZE))) {
	79	sr_err("compressed_buf malloc failed.");
	80	goto err_free_devc;
	81	}
	82
	83	/* Allocate memory for the uncompressed samples. */
	84	if (!(devc->sample_buf = g_try_malloc0(SAMPLE_BUF_SIZE))) {
	85	sr_err("sample_buf malloc failed.");
	86	goto err_free_compressed_buf;
	87	}
	88
	89	/* Allocate memory for the FTDI context (ftdic) and initialize it. */
	90	if (!(devc->ftdic = ftdi_new())) {
	91	sr_err("Failed to initialize libftdi.");
	92	goto err_free_sample_buf;
	93	}
	94
	95	/* Check for the device and temporarily open it. */
	96	ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID,
	97	USB_IPRODUCT, NULL);
	98	if (ret < 0) {
	99	/* Log errors, except for -3 ("device not found"). */
	100	if (ret != -3)
	101	sr_err("Failed to open device (%d): %s", ret,
	102	ftdi_get_error_string(devc->ftdic));
	103	goto err_free_ftdic;
	104	}
	105
	106	/* Register the device with libsigrok. */
	107	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	108	sdi->status = SR_ST_INACTIVE;
	109	sdi->vendor = g_strdup(USB_VENDOR_NAME);
	110	sdi->model = g_strdup(USB_MODEL_NAME);
	111	sdi->priv = devc;
	112
	113	for (i = 0; i < ARRAY_SIZE(channel_names); i++)
	114	sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, channel_names[i]);
	115
	116	/* Close device. We'll reopen it again when we need it. */
	117	scanaplus_close(devc);
	118
	119	return std_scan_complete(di, g_slist_append(NULL, sdi));
	120
	121	scanaplus_close(devc);
	122	err_free_ftdic:
	123	ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
	124	err_free_sample_buf:
	125	g_free(devc->sample_buf);
	126	err_free_compressed_buf:
	127	g_free(devc->compressed_buf);
	128	err_free_devc:
	129	g_free(devc);
	130
	131	return NULL;
	132	}
	133
	134	static int dev_open(struct sr_dev_inst *sdi)
	135	{
	136	struct dev_context *devc;
	137	int ret;
	138
	139	devc = sdi->priv;
	140
	141	/* Select interface A, otherwise communication will fail. */
	142	ret = ftdi_set_interface(devc->ftdic, INTERFACE_A);
	143	if (ret < 0) {
	144	sr_err("Failed to set FTDI interface A (%d): %s", ret,
	145	ftdi_get_error_string(devc->ftdic));
	146	return SR_ERR;
	147	}
	148	sr_dbg("FTDI chip interface A set successfully.");
	149
	150	/* Open the device. */
	151	ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID,
	152	USB_IPRODUCT, NULL);
	153	if (ret < 0) {
	154	sr_err("Failed to open device (%d): %s", ret,
	155	ftdi_get_error_string(devc->ftdic));
	156	return SR_ERR;
	157	}
	158	sr_dbg("FTDI device opened successfully.");
	159
	160	/* Purge RX/TX buffers in the FTDI chip. */
	161	if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
	162	sr_err("Failed to purge FTDI RX/TX buffers (%d): %s.",
	163	ret, ftdi_get_error_string(devc->ftdic));
	164	goto err_dev_open_close_ftdic;
	165	}
	166	sr_dbg("FTDI chip buffers purged successfully.");
	167
	168	/* Reset the FTDI bitmode. */
	169	ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_RESET);
	170	if (ret < 0) {
	171	sr_err("Failed to reset the FTDI chip bitmode (%d): %s.",
	172	ret, ftdi_get_error_string(devc->ftdic));
	173	goto err_dev_open_close_ftdic;
	174	}
	175	sr_dbg("FTDI chip bitmode reset successfully.");
	176
	177	/* Set FTDI bitmode to "sync FIFO". */
	178	ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_SYNCFF);
	179	if (ret < 0) {
	180	sr_err("Failed to put FTDI chip into sync FIFO mode (%d): %s.",
	181	ret, ftdi_get_error_string(devc->ftdic));
	182	goto err_dev_open_close_ftdic;
	183	}
	184	sr_dbg("FTDI chip sync FIFO mode entered successfully.");
	185
	186	/* Set the FTDI latency timer to 2. */
	187	ret = ftdi_set_latency_timer(devc->ftdic, 2);
	188	if (ret < 0) {
	189	sr_err("Failed to set FTDI latency timer (%d): %s.",
	190	ret, ftdi_get_error_string(devc->ftdic));
	191	goto err_dev_open_close_ftdic;
	192	}
	193	sr_dbg("FTDI chip latency timer set successfully.");
	194
	195	/* Set the FTDI read data chunk size to 64kB. */
	196	ret = ftdi_read_data_set_chunksize(devc->ftdic, 64 * 1024);
	197	if (ret < 0) {
	198	sr_err("Failed to set FTDI read data chunk size (%d): %s.",
	199	ret, ftdi_get_error_string(devc->ftdic));
	200	goto err_dev_open_close_ftdic;
	201	}
	202	sr_dbg("FTDI chip read data chunk size set successfully.");
	203
	204	/* Get the ScanaPLUS device ID from the FTDI EEPROM. */
	205	if ((ret = scanaplus_get_device_id(devc)) < 0) {
	206	sr_err("Failed to get ScanaPLUS device ID: %d.", ret);
	207	goto err_dev_open_close_ftdic;
	208	}
	209	sr_dbg("Received ScanaPLUS device ID successfully: %02x %02x %02x.",
	210	devc->devid[0], devc->devid[1], devc->devid[2]);
	211
	212	sdi->status = SR_ST_ACTIVE;
	213
	214	return SR_OK;
	215
	216	err_dev_open_close_ftdic:
	217	scanaplus_close(devc);
	218	return SR_ERR;
	219	}
	220
	221	static int dev_close(struct sr_dev_inst *sdi)
	222	{
	223	int ret;
	224	struct dev_context *devc;
	225
	226	ret = SR_OK;
	227	devc = sdi->priv;
	228
	229	if (sdi->status == SR_ST_ACTIVE) {
	230	sr_dbg("Status ACTIVE, closing device.");
	231	ret = scanaplus_close(devc);
	232	} else {
	233	sr_spew("Status not ACTIVE, nothing to do.");
	234	}
	235
	236	sdi->status = SR_ST_INACTIVE;
	237
	238	return ret;
	239	}
	240
	241	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	242	const struct sr_channel_group *cg)
	243	{
	244	(void)sdi;
	245	(void)cg;
	246
	247	switch (key) {
	248	case SR_CONF_SAMPLERATE:
	249	/* The ScanaPLUS samplerate is 100MHz and can't be changed. */
	250	*data = g_variant_new_uint64(SR_MHZ(100));
	251	break;
	252	default:
	253	return SR_ERR_NA;
	254	}
	255
	256	return SR_OK;
	257	}
	258
	259	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
	260	const struct sr_channel_group *cg)
	261	{
	262	struct dev_context *devc;
	263
	264	(void)cg;
	265
	266	if (sdi->status != SR_ST_ACTIVE)
	267	return SR_ERR_DEV_CLOSED;
	268
	269	devc = sdi->priv;
	270
	271	switch (key) {
	272	case SR_CONF_SAMPLERATE:
	273	if (g_variant_get_uint64(data) != SR_MHZ(100)) {
	274	sr_err("ScanaPLUS only supports samplerate = 100MHz.");
	275	return SR_ERR_ARG;
	276	}
	277	/* Nothing to do, the ScanaPLUS samplerate is always 100MHz. */
	278	break;
	279	case SR_CONF_LIMIT_MSEC:
	280	if (g_variant_get_uint64(data) == 0)
	281	return SR_ERR_ARG;
	282	devc->limit_msec = g_variant_get_uint64(data);
	283	break;
	284	case SR_CONF_LIMIT_SAMPLES:
	285	if (g_variant_get_uint64(data) == 0)
	286	return SR_ERR_ARG;
	287	devc->limit_samples = g_variant_get_uint64(data);
	288	break;
	289	default:
	290	return SR_ERR_NA;
	291	}
	292
	293	return SR_OK;
	294	}
	295
	296	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	297	const struct sr_channel_group *cg)
	298	{
	299	GVariant *gvar;
	300	GVariantBuilder gvb;
	301
	302	(void)sdi;
	303	(void)cg;
	304
	305	switch (key) {
	306	case SR_CONF_DEVICE_OPTIONS:
	307	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	308	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
	309	break;
	310	case SR_CONF_SAMPLERATE:
	311	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	312	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
	313	samplerates, ARRAY_SIZE(samplerates),
	314	sizeof(uint64_t));
	315	g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
	316	*data = g_variant_builder_end(&gvb);
	317	break;
	318	default:
	319	return SR_ERR_NA;
	320	}
	321
	322	return SR_OK;
	323	}
	324
	325	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
	326	{
	327	int ret;
	328	struct dev_context *devc;
	329
	330	if (sdi->status != SR_ST_ACTIVE)
	331	return SR_ERR_DEV_CLOSED;
	332
	333	devc = sdi->priv;
	334
	335	if (!devc->ftdic)
	336	return SR_ERR_BUG;
	337
	338	/* TODO: Configure channels later (thresholds etc.). */
	339
	340	/* Properly reset internal variables before every new acquisition. */
	341	devc->compressed_bytes_ignored = 0;
	342	devc->samples_sent = 0;
	343	devc->bytes_received = 0;
	344
	345	if ((ret = scanaplus_init(devc)) < 0)
	346	return ret;
	347
	348	if ((ret = scanaplus_start_acquisition(devc)) < 0)
	349	return ret;
	350
	351	std_session_send_df_header(sdi);
	352
	353	/* Hook up a dummy handler to receive data from the device. */
	354	sr_session_source_add(sdi->session, -1, 0, 0, scanaplus_receive_data, (void *)sdi);
	355
	356	return SR_OK;
	357	}
	358
	359	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
	360	{
	361	sr_dbg("Stopping acquisition.");
	362	sr_session_source_remove(sdi->session, -1);
	363	std_session_send_df_end(sdi);
	364
	365	return SR_OK;
	366	}
	367
	368	static struct sr_dev_driver ikalogic_scanaplus_driver_info = {
	369	.name = "ikalogic-scanaplus",
	370	.longname = "IKALOGIC ScanaPLUS",
	371	.api_version = 1,
	372	.init = std_init,
	373	.cleanup = std_cleanup,
	374	.scan = scan,
	375	.dev_list = std_dev_list,
	376	.dev_clear = dev_clear,
	377	.config_get = config_get,
	378	.config_set = config_set,
	379	.config_list = config_list,
	380	.dev_open = dev_open,
	381	.dev_close = dev_close,
	382	.dev_acquisition_start = dev_acquisition_start,
	383	.dev_acquisition_stop = dev_acquisition_stop,
	384	.context = NULL,
	385	};
	386	SR_REGISTER_DEV_DRIVER(ikalogic_scanaplus_driver_info);