[libsigrok.git] / src / hardware / ikalogic-scanalogic2 / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2013 Marc Schink <sigrok-dev@marcschink.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 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 <config.h>
#include "protocol.h"

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

static const int32_t trigger_matches[] = {
	SR_TRIGGER_RISING,
	SR_TRIGGER_FALLING,
	SR_TRIGGER_EDGE,
};

SR_PRIV const uint64_t sl2_samplerates[NUM_SAMPLERATES] = {
	SR_KHZ(1.25),
	SR_KHZ(10),
	SR_KHZ(50),
	SR_KHZ(100),
	SR_KHZ(250),
	SR_KHZ(500),
	SR_MHZ(1),
	SR_MHZ(2.5),
	SR_MHZ(5),
	SR_MHZ(10),
	SR_MHZ(20),
};

static const char *channel_names[] = {
	"0", "1", "2", "3",
};

SR_PRIV struct sr_dev_driver ikalogic_scanalogic2_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)
{
	GSList *usb_devices, *devices, *l;
	struct drv_context *drvc;
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	struct sr_usb_dev_inst *usb;
	struct device_info dev_info;
	unsigned int i;
	int ret;

	(void)options;

	devices = NULL;
	drvc = di->context;
	drvc->instances = NULL;

	usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, USB_VID_PID);

	if (!usb_devices)
		return NULL;

	for (l = usb_devices; l; l = l->next) {
		usb = l->data;

		if ((ret = sl2_get_device_info(*usb, &dev_info)) < 0) {
			sr_warn("Failed to get device information: %d.", ret);
			sr_usb_dev_inst_free(usb);
			continue;
		}

		devc = g_malloc0(sizeof(struct dev_context));

		if (!(devc->xfer_in = libusb_alloc_transfer(0))) {
			sr_err("Transfer malloc failed.");
			sr_usb_dev_inst_free(usb);
			g_free(devc);
			continue;
		}

		if (!(devc->xfer_out = libusb_alloc_transfer(0))) {
			sr_err("Transfer malloc failed.");
			sr_usb_dev_inst_free(usb);
			libusb_free_transfer(devc->xfer_in);
			g_free(devc);
			continue;
		}

		sdi = g_malloc0(sizeof(struct sr_dev_inst));
		sdi->status = SR_ST_INACTIVE;
		sdi->vendor = g_strdup(VENDOR_NAME);
		sdi->model = g_strdup(MODEL_NAME);
		sdi->version = g_strdup_printf("%u.%u", dev_info.fw_ver_major, dev_info.fw_ver_minor);
		sdi->serial_num = g_strdup_printf("%d", dev_info.serial);
		sdi->priv = devc;
		sdi->driver = di;
		sdi->inst_type = SR_INST_USB;
		sdi->conn = usb;

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

		devc->state = STATE_IDLE;
		devc->next_state = STATE_IDLE;

		/* Set default samplerate. */
		sl2_set_samplerate(sdi, DEFAULT_SAMPLERATE);

		/* Set default capture ratio. */
		devc->capture_ratio = 0;

		/* Set default after trigger delay. */
		devc->after_trigger_delay = 0;

		memset(devc->xfer_buf_in, 0, LIBUSB_CONTROL_SETUP_SIZE +
			PACKET_LENGTH);
		memset(devc->xfer_buf_out, 0, LIBUSB_CONTROL_SETUP_SIZE +
			PACKET_LENGTH);

		libusb_fill_control_setup(devc->xfer_buf_in,
			USB_REQUEST_TYPE_IN, USB_HID_GET_REPORT,
			USB_HID_REPORT_TYPE_FEATURE, USB_INTERFACE,
			PACKET_LENGTH);
		libusb_fill_control_setup(devc->xfer_buf_out,
			USB_REQUEST_TYPE_OUT, USB_HID_SET_REPORT,
			USB_HID_REPORT_TYPE_FEATURE, USB_INTERFACE,
			PACKET_LENGTH);

		devc->xfer_data_in = devc->xfer_buf_in +
			LIBUSB_CONTROL_SETUP_SIZE;
		devc->xfer_data_out = devc->xfer_buf_out +
			LIBUSB_CONTROL_SETUP_SIZE;

		drvc->instances = g_slist_append(drvc->instances, sdi);
		devices = g_slist_append(devices, sdi);
	}

	g_slist_free(usb_devices);

	return devices;
}

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

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

	devc = priv;

	sr_dbg("Device context cleared.");

	libusb_free_transfer(devc->xfer_in);
	libusb_free_transfer(devc->xfer_out);
	g_free(devc);
}

static int dev_clear(const struct sr_dev_driver *di)
{
	return std_dev_clear(di, &clear_dev_context);
}

static int dev_open(struct sr_dev_inst *sdi)
{
	struct sr_dev_driver *di = sdi->driver;
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_usb_dev_inst *usb;
	uint8_t buffer[PACKET_LENGTH];
	int ret;

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

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

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

	/*
	 * Determine if a kernel driver is active on this interface and, if so,
	 * detach it.
	 */
	if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) {
		ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE);
		if (ret < 0) {
			sr_err("Failed to detach kernel driver: %s.",
				libusb_error_name(ret));
			return SR_ERR;
		}
	}

	if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE)) < 0) {
		sr_err("Failed to claim interface: %s.",
			libusb_error_name(ret));
		return SR_ERR;
	}

	libusb_fill_control_transfer(devc->xfer_in, usb->devhdl,
		devc->xfer_buf_in, sl2_receive_transfer_in,
		sdi, USB_TIMEOUT_MS);

	libusb_fill_control_transfer(devc->xfer_out, usb->devhdl,
		devc->xfer_buf_out, sl2_receive_transfer_out,
		sdi, USB_TIMEOUT_MS);

	memset(buffer, 0, sizeof(buffer));

	buffer[0] = CMD_RESET;
	if ((ret = sl2_transfer_out(usb->devhdl, buffer)) != PACKET_LENGTH) {
		sr_err("Device reset failed: %s.", libusb_error_name(ret));
		return SR_ERR;
	}

	/*
	 * Set the device to idle state. If the device is not in idle state it
	 * possibly will reset itself after a few seconds without being used
	 * and thereby close the connection.
	 */
	buffer[0] = CMD_IDLE;
	if ((ret = sl2_transfer_out(usb->devhdl, buffer)) != PACKET_LENGTH) {
		sr_err("Failed to set device in idle state: %s.",
			libusb_error_name(ret));
		return SR_ERR;
	}

	sdi->status = SR_ST_ACTIVE;

	return SR_OK;
}

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

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

	usb = sdi->conn;

	if (!usb->devhdl)
		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)
{
	return dev_clear(di);
}

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;
	int ret;

	(void)cg;

	ret = SR_OK;
	devc = sdi->priv;

	switch (key) {
	case SR_CONF_SAMPLERATE:
		*data = g_variant_new_uint64(devc->samplerate);
		break;
	case SR_CONF_CAPTURE_RATIO:
		*data = g_variant_new_uint64(devc->capture_ratio);
		break;
	default:
		return SR_ERR_NA;
	}

	return ret;
}

static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	uint64_t samplerate, limit_samples, capture_ratio;
	int ret;

	(void)cg;

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

	switch (key) {
	case SR_CONF_LIMIT_SAMPLES:
		limit_samples = g_variant_get_uint64(data);
		ret = sl2_set_limit_samples(sdi, limit_samples);
		break;
	case SR_CONF_SAMPLERATE:
		samplerate = g_variant_get_uint64(data);
		ret = sl2_set_samplerate(sdi, samplerate);
		break;
	case SR_CONF_CAPTURE_RATIO:
		capture_ratio = g_variant_get_uint64(data);
		ret = sl2_set_capture_ratio(sdi, capture_ratio);
		break;
	default:
		return 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)
{
	GVariant *gvar, *grange[2];
	GVariantBuilder gvb;
	int ret;

	(void)sdi;
	(void)cg;

	ret = SR_OK;
	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"),
			sl2_samplerates, ARRAY_SIZE(sl2_samplerates),
			sizeof(uint64_t));
		g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
		*data = g_variant_builder_end(&gvb);
		break;
	case SR_CONF_TRIGGER_MATCH:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
				trigger_matches, ARRAY_SIZE(trigger_matches),
				sizeof(int32_t));
		break;
	case SR_CONF_LIMIT_SAMPLES:
		grange[0] = g_variant_new_uint64(0);
		grange[1] = g_variant_new_uint64(MAX_SAMPLES);
		*data = g_variant_new_tuple(grange, 2);
		break;
	default:
		return SR_ERR_NA;
	}

	return ret;
}

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;
	uint16_t trigger_bytes, tmp;
	unsigned int i, j;
	int ret;

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

	devc = sdi->priv;
	drvc = di->context;

	devc->cb_data = cb_data;
	devc->wait_data_ready_locked = TRUE;
	devc->stopping_in_progress = FALSE;
	devc->transfer_error = FALSE;
	devc->samples_processed = 0;
	devc->channel = 0;
	devc->sample_packet = 0;

	/*
	 * The trigger must be configured first because the calculation of the
	 * pre and post trigger samples depends on a configured trigger.
	 */
	sl2_convert_trigger(sdi);
	sl2_calculate_trigger_samples(sdi);

	trigger_bytes = devc->pre_trigger_bytes + devc->post_trigger_bytes;

	/* Calculate the number of expected sample packets. */
	devc->num_sample_packets = trigger_bytes / PACKET_NUM_SAMPLE_BYTES;

	/* Round up the number of expected sample packets. */
	if (trigger_bytes % PACKET_NUM_SAMPLE_BYTES != 0)
		devc->num_sample_packets++;

	devc->num_enabled_channels = 0;

	/*
	 * Count the number of enabled channels and number them for a sequential
	 * access.
	 */
	for (i = 0, j = 0; i < NUM_CHANNELS; i++) {
		if (devc->channels[i]->enabled) {
			devc->num_enabled_channels++;
			devc->channel_map[j] = i;
			j++;
		}
	}

	sr_dbg("Number of enabled channels: %i.", devc->num_enabled_channels);

	/* Set up the transfer buffer for the acquisition. */
	devc->xfer_data_out[0] = CMD_SAMPLE;
	devc->xfer_data_out[1] = 0x00;

	tmp = GUINT16_TO_LE(devc->pre_trigger_bytes);
	memcpy(devc->xfer_data_out + 2, &tmp, sizeof(tmp));

	tmp = GUINT16_TO_LE(devc->post_trigger_bytes);
	memcpy(devc->xfer_data_out + 4, &tmp, sizeof(tmp));

	devc->xfer_data_out[6] = devc->samplerate_id;
	devc->xfer_data_out[7] = devc->trigger_type;
	devc->xfer_data_out[8] = devc->trigger_channel;
	devc->xfer_data_out[9] = 0x00;

	tmp = GUINT16_TO_LE(devc->after_trigger_delay);
	memcpy(devc->xfer_data_out + 10, &tmp, sizeof(tmp));

	if ((ret = libusb_submit_transfer(devc->xfer_out)) != 0) {
		sr_err("Submit transfer failed: %s.", libusb_error_name(ret));
		return SR_ERR;
	}

	usb_source_add(sdi->session, drvc->sr_ctx, 100,
			ikalogic_scanalogic2_receive_data, (void *)sdi);

	sr_dbg("Acquisition started successfully.");

	std_session_send_df_header(cb_data, LOG_PREFIX);

	devc->next_state = STATE_SAMPLE;

	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;

	sr_dbg("Stopping acquisition.");

	sdi->status = SR_ST_STOPPING;

	return SR_OK;
}

SR_PRIV struct sr_dev_driver ikalogic_scanalogic2_driver_info = {
	.name = "ikalogic-scanalogic2",
	.longname = "IKALOGIC Scanalogic-2",
	.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,
	.context = NULL,
};
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2013 Marc Schink <sigrok-dev@marcschink.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 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 <config.h>
	21	#include "protocol.h"
	22
	23	static const uint32_t devopts[] = {
	24	SR_CONF_LOGIC_ANALYZER,
	25	SR_CONF_LIMIT_SAMPLES \| SR_CONF_SET \| SR_CONF_LIST,
	26	SR_CONF_SAMPLERATE \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	27	SR_CONF_TRIGGER_MATCH \| SR_CONF_LIST,
	28	SR_CONF_CAPTURE_RATIO \| SR_CONF_GET \| SR_CONF_SET,
	29	};
	30
	31	static const int32_t trigger_matches[] = {
	32	SR_TRIGGER_RISING,
	33	SR_TRIGGER_FALLING,
	34	SR_TRIGGER_EDGE,
	35	};
	36
	37	SR_PRIV const uint64_t sl2_samplerates[NUM_SAMPLERATES] = {
	38	SR_KHZ(1.25),
	39	SR_KHZ(10),
	40	SR_KHZ(50),
	41	SR_KHZ(100),
	42	SR_KHZ(250),
	43	SR_KHZ(500),
	44	SR_MHZ(1),
	45	SR_MHZ(2.5),
	46	SR_MHZ(5),
	47	SR_MHZ(10),
	48	SR_MHZ(20),
	49	};
	50
	51	static const char *channel_names[] = {
	52	"0", "1", "2", "3",
	53	};
	54
	55	SR_PRIV struct sr_dev_driver ikalogic_scanalogic2_driver_info;
	56
	57	static int init(struct sr_dev_driver di, struct sr_context sr_ctx)
	58	{
	59	return std_init(sr_ctx, di, LOG_PREFIX);
	60	}
	61
	62	static GSList scan(struct sr_dev_driver di, GSList *options)
	63	{
	64	GSList usb_devices, devices, *l;
	65	struct drv_context *drvc;
	66	struct sr_dev_inst *sdi;
	67	struct dev_context *devc;
	68	struct sr_usb_dev_inst *usb;
	69	struct device_info dev_info;
	70	unsigned int i;
	71	int ret;
	72
	73	(void)options;
	74
	75	devices = NULL;
	76	drvc = di->context;
	77	drvc->instances = NULL;
	78
	79	usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, USB_VID_PID);
	80
	81	if (!usb_devices)
	82	return NULL;
	83
	84	for (l = usb_devices; l; l = l->next) {
	85	usb = l->data;
	86
	87	if ((ret = sl2_get_device_info(*usb, &dev_info)) < 0) {
	88	sr_warn("Failed to get device information: %d.", ret);
	89	sr_usb_dev_inst_free(usb);
	90	continue;
	91	}
	92
	93	devc = g_malloc0(sizeof(struct dev_context));
	94
	95	if (!(devc->xfer_in = libusb_alloc_transfer(0))) {
	96	sr_err("Transfer malloc failed.");
	97	sr_usb_dev_inst_free(usb);
	98	g_free(devc);
	99	continue;
	100	}
	101
	102	if (!(devc->xfer_out = libusb_alloc_transfer(0))) {
	103	sr_err("Transfer malloc failed.");
	104	sr_usb_dev_inst_free(usb);
	105	libusb_free_transfer(devc->xfer_in);
	106	g_free(devc);
	107	continue;
	108	}
	109
	110	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	111	sdi->status = SR_ST_INACTIVE;
	112	sdi->vendor = g_strdup(VENDOR_NAME);
	113	sdi->model = g_strdup(MODEL_NAME);
	114	sdi->version = g_strdup_printf("%u.%u", dev_info.fw_ver_major, dev_info.fw_ver_minor);
	115	sdi->serial_num = g_strdup_printf("%d", dev_info.serial);
	116	sdi->priv = devc;
	117	sdi->driver = di;
	118	sdi->inst_type = SR_INST_USB;
	119	sdi->conn = usb;
	120
	121	for (i = 0; i < ARRAY_SIZE(channel_names); i++)
	122	devc->channels[i] = sr_channel_new(sdi, i,
	123	SR_CHANNEL_LOGIC, TRUE, channel_names[i]);
	124
	125	devc->state = STATE_IDLE;
	126	devc->next_state = STATE_IDLE;
	127
	128	/* Set default samplerate. */
	129	sl2_set_samplerate(sdi, DEFAULT_SAMPLERATE);
	130
	131	/* Set default capture ratio. */
	132	devc->capture_ratio = 0;
	133
	134	/* Set default after trigger delay. */
	135	devc->after_trigger_delay = 0;
	136
	137	memset(devc->xfer_buf_in, 0, LIBUSB_CONTROL_SETUP_SIZE +
	138	PACKET_LENGTH);
	139	memset(devc->xfer_buf_out, 0, LIBUSB_CONTROL_SETUP_SIZE +
	140	PACKET_LENGTH);
	141
	142	libusb_fill_control_setup(devc->xfer_buf_in,
	143	USB_REQUEST_TYPE_IN, USB_HID_GET_REPORT,
	144	USB_HID_REPORT_TYPE_FEATURE, USB_INTERFACE,
	145	PACKET_LENGTH);
	146	libusb_fill_control_setup(devc->xfer_buf_out,
	147	USB_REQUEST_TYPE_OUT, USB_HID_SET_REPORT,
	148	USB_HID_REPORT_TYPE_FEATURE, USB_INTERFACE,
	149	PACKET_LENGTH);
	150
	151	devc->xfer_data_in = devc->xfer_buf_in +
	152	LIBUSB_CONTROL_SETUP_SIZE;
	153	devc->xfer_data_out = devc->xfer_buf_out +
	154	LIBUSB_CONTROL_SETUP_SIZE;
	155
	156	drvc->instances = g_slist_append(drvc->instances, sdi);
	157	devices = g_slist_append(devices, sdi);
	158	}
	159
	160	g_slist_free(usb_devices);
	161
	162	return devices;
	163	}
	164
	165	static GSList dev_list(const struct sr_dev_driver di)
	166	{
	167	return ((struct drv_context *)(di->context))->instances;
	168	}
	169
	170	static void clear_dev_context(void *priv)
	171	{
	172	struct dev_context *devc;
	173
	174	devc = priv;
	175
	176	sr_dbg("Device context cleared.");
	177
	178	libusb_free_transfer(devc->xfer_in);
	179	libusb_free_transfer(devc->xfer_out);
	180	g_free(devc);
	181	}
	182
	183	static int dev_clear(const struct sr_dev_driver *di)
	184	{
	185	return std_dev_clear(di, &clear_dev_context);
	186	}
	187
	188	static int dev_open(struct sr_dev_inst *sdi)
	189	{
	190	struct sr_dev_driver *di = sdi->driver;
	191	struct drv_context *drvc;
	192	struct dev_context *devc;
	193	struct sr_usb_dev_inst *usb;
	194	uint8_t buffer[PACKET_LENGTH];
	195	int ret;
	196
	197	if (!(drvc = di->context)) {
	198	sr_err("Driver was not initialized.");
	199	return SR_ERR;
	200	}
	201
	202	usb = sdi->conn;
	203	devc = sdi->priv;
	204
	205	if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
	206	return SR_ERR;
	207
	208	/*
	209	* Determine if a kernel driver is active on this interface and, if so,
	210	* detach it.
	211	*/
	212	if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) {
	213	ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE);
	214	if (ret < 0) {
	215	sr_err("Failed to detach kernel driver: %s.",
	216	libusb_error_name(ret));
	217	return SR_ERR;
	218	}
	219	}
	220
	221	if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE)) < 0) {
	222	sr_err("Failed to claim interface: %s.",
	223	libusb_error_name(ret));
	224	return SR_ERR;
	225	}
	226
	227	libusb_fill_control_transfer(devc->xfer_in, usb->devhdl,
	228	devc->xfer_buf_in, sl2_receive_transfer_in,
	229	sdi, USB_TIMEOUT_MS);
	230
	231	libusb_fill_control_transfer(devc->xfer_out, usb->devhdl,
	232	devc->xfer_buf_out, sl2_receive_transfer_out,
	233	sdi, USB_TIMEOUT_MS);
	234
	235	memset(buffer, 0, sizeof(buffer));
	236
	237	buffer[0] = CMD_RESET;
	238	if ((ret = sl2_transfer_out(usb->devhdl, buffer)) != PACKET_LENGTH) {
	239	sr_err("Device reset failed: %s.", libusb_error_name(ret));
	240	return SR_ERR;
	241	}
	242
	243	/*
	244	* Set the device to idle state. If the device is not in idle state it
	245	* possibly will reset itself after a few seconds without being used
	246	* and thereby close the connection.
	247	*/
	248	buffer[0] = CMD_IDLE;
	249	if ((ret = sl2_transfer_out(usb->devhdl, buffer)) != PACKET_LENGTH) {
	250	sr_err("Failed to set device in idle state: %s.",
	251	libusb_error_name(ret));
	252	return SR_ERR;
	253	}
	254
	255	sdi->status = SR_ST_ACTIVE;
	256
	257	return SR_OK;
	258	}
	259
	260	static int dev_close(struct sr_dev_inst *sdi)
	261	{
	262	struct sr_dev_driver *di = sdi->driver;
	263	struct sr_usb_dev_inst *usb;
	264
	265	if (!di->context) {
	266	sr_err("Driver was not initialized.");
	267	return SR_ERR;
	268	}
	269
	270	usb = sdi->conn;
	271
	272	if (!usb->devhdl)
	273	return SR_OK;
	274
	275	libusb_release_interface(usb->devhdl, USB_INTERFACE);
	276	libusb_close(usb->devhdl);
	277
	278	usb->devhdl = NULL;
	279	sdi->status = SR_ST_INACTIVE;
	280
	281	return SR_OK;
	282	}
	283
	284	static int cleanup(const struct sr_dev_driver *di)
	285	{
	286	return dev_clear(di);
	287	}
	288
	289	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	290	const struct sr_channel_group *cg)
	291	{
	292	struct dev_context *devc;
	293	int ret;
	294
	295	(void)cg;
	296
	297	ret = SR_OK;
	298	devc = sdi->priv;
	299
	300	switch (key) {
	301	case SR_CONF_SAMPLERATE:
	302	*data = g_variant_new_uint64(devc->samplerate);
	303	break;
	304	case SR_CONF_CAPTURE_RATIO:
	305	*data = g_variant_new_uint64(devc->capture_ratio);
	306	break;
	307	default:
	308	return SR_ERR_NA;
	309	}
	310
	311	return ret;
	312	}
	313
	314	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
	315	const struct sr_channel_group *cg)
	316	{
	317	uint64_t samplerate, limit_samples, capture_ratio;
	318	int ret;
	319
	320	(void)cg;
	321
	322	if (sdi->status != SR_ST_ACTIVE)
	323	return SR_ERR_DEV_CLOSED;
	324
	325	switch (key) {
	326	case SR_CONF_LIMIT_SAMPLES:
	327	limit_samples = g_variant_get_uint64(data);
	328	ret = sl2_set_limit_samples(sdi, limit_samples);
	329	break;
	330	case SR_CONF_SAMPLERATE:
	331	samplerate = g_variant_get_uint64(data);
	332	ret = sl2_set_samplerate(sdi, samplerate);
	333	break;
	334	case SR_CONF_CAPTURE_RATIO:
	335	capture_ratio = g_variant_get_uint64(data);
	336	ret = sl2_set_capture_ratio(sdi, capture_ratio);
	337	break;
	338	default:
	339	return SR_ERR_NA;
	340	}
	341
	342	return ret;
	343	}
	344
	345	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	346	const struct sr_channel_group *cg)
	347	{
	348	GVariant gvar, grange[2];
	349	GVariantBuilder gvb;
	350	int ret;
	351
	352	(void)sdi;
	353	(void)cg;
	354
	355	ret = SR_OK;
	356	switch (key) {
	357	case SR_CONF_DEVICE_OPTIONS:
	358	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	359	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
	360	break;
	361	case SR_CONF_SAMPLERATE:
	362	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	363	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
	364	sl2_samplerates, ARRAY_SIZE(sl2_samplerates),
	365	sizeof(uint64_t));
	366	g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
	367	*data = g_variant_builder_end(&gvb);
	368	break;
	369	case SR_CONF_TRIGGER_MATCH:
	370	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	371	trigger_matches, ARRAY_SIZE(trigger_matches),
	372	sizeof(int32_t));
	373	break;
	374	case SR_CONF_LIMIT_SAMPLES:
	375	grange[0] = g_variant_new_uint64(0);
	376	grange[1] = g_variant_new_uint64(MAX_SAMPLES);
	377	*data = g_variant_new_tuple(grange, 2);
	378	break;
	379	default:
	380	return SR_ERR_NA;
	381	}
	382
	383	return ret;
	384	}
	385
	386	static int dev_acquisition_start(const struct sr_dev_inst sdi, void cb_data)
	387	{
	388	struct sr_dev_driver *di = sdi->driver;
	389	struct drv_context *drvc;
	390	struct dev_context *devc;
	391	uint16_t trigger_bytes, tmp;
	392	unsigned int i, j;
	393	int ret;
	394
	395	if (sdi->status != SR_ST_ACTIVE)
	396	return SR_ERR_DEV_CLOSED;
	397
	398	devc = sdi->priv;
	399	drvc = di->context;
	400
	401	devc->cb_data = cb_data;
	402	devc->wait_data_ready_locked = TRUE;
	403	devc->stopping_in_progress = FALSE;
	404	devc->transfer_error = FALSE;
	405	devc->samples_processed = 0;
	406	devc->channel = 0;
	407	devc->sample_packet = 0;
	408
	409	/*
	410	* The trigger must be configured first because the calculation of the
	411	* pre and post trigger samples depends on a configured trigger.
	412	*/
	413	sl2_convert_trigger(sdi);
	414	sl2_calculate_trigger_samples(sdi);
	415
	416	trigger_bytes = devc->pre_trigger_bytes + devc->post_trigger_bytes;
	417
	418	/* Calculate the number of expected sample packets. */
	419	devc->num_sample_packets = trigger_bytes / PACKET_NUM_SAMPLE_BYTES;
	420
	421	/* Round up the number of expected sample packets. */
	422	if (trigger_bytes % PACKET_NUM_SAMPLE_BYTES != 0)
	423	devc->num_sample_packets++;
	424
	425	devc->num_enabled_channels = 0;
	426
	427	/*
	428	* Count the number of enabled channels and number them for a sequential
	429	* access.
	430	*/
	431	for (i = 0, j = 0; i < NUM_CHANNELS; i++) {
	432	if (devc->channels[i]->enabled) {
	433	devc->num_enabled_channels++;
	434	devc->channel_map[j] = i;
	435	j++;
	436	}
	437	}
	438
	439	sr_dbg("Number of enabled channels: %i.", devc->num_enabled_channels);
	440
	441	/* Set up the transfer buffer for the acquisition. */
	442	devc->xfer_data_out[0] = CMD_SAMPLE;
	443	devc->xfer_data_out[1] = 0x00;
	444
	445	tmp = GUINT16_TO_LE(devc->pre_trigger_bytes);
	446	memcpy(devc->xfer_data_out + 2, &tmp, sizeof(tmp));
	447
	448	tmp = GUINT16_TO_LE(devc->post_trigger_bytes);
	449	memcpy(devc->xfer_data_out + 4, &tmp, sizeof(tmp));
	450
	451	devc->xfer_data_out[6] = devc->samplerate_id;
	452	devc->xfer_data_out[7] = devc->trigger_type;
	453	devc->xfer_data_out[8] = devc->trigger_channel;
	454	devc->xfer_data_out[9] = 0x00;
	455
	456	tmp = GUINT16_TO_LE(devc->after_trigger_delay);
	457	memcpy(devc->xfer_data_out + 10, &tmp, sizeof(tmp));
	458
	459	if ((ret = libusb_submit_transfer(devc->xfer_out)) != 0) {
	460	sr_err("Submit transfer failed: %s.", libusb_error_name(ret));
	461	return SR_ERR;
	462	}
	463
	464	usb_source_add(sdi->session, drvc->sr_ctx, 100,
	465	ikalogic_scanalogic2_receive_data, (void *)sdi);
	466
	467	sr_dbg("Acquisition started successfully.");
	468
	469	std_session_send_df_header(cb_data, LOG_PREFIX);
	470
	471	devc->next_state = STATE_SAMPLE;
	472
	473	return SR_OK;
	474	}
	475
	476	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	477	{
	478	(void)cb_data;
	479
	480	if (sdi->status != SR_ST_ACTIVE)
	481	return SR_ERR_DEV_CLOSED;
	482
	483	sr_dbg("Stopping acquisition.");
	484
	485	sdi->status = SR_ST_STOPPING;
	486
	487	return SR_OK;
	488	}
	489
	490	SR_PRIV struct sr_dev_driver ikalogic_scanalogic2_driver_info = {
	491	.name = "ikalogic-scanalogic2",
	492	.longname = "IKALOGIC Scanalogic-2",
	493	.api_version = 1,
	494	.init = init,
	495	.cleanup = cleanup,
	496	.scan = scan,
	497	.dev_list = dev_list,
	498	.dev_clear = dev_clear,
	499	.config_get = config_get,
	500	.config_set = config_set,
	501	.config_list = config_list,
	502	.dev_open = dev_open,
	503	.dev_close = dev_close,
	504	.dev_acquisition_start = dev_acquisition_start,
	505	.dev_acquisition_stop = dev_acquisition_stop,
	506	.context = NULL,
	507	};