[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",
};

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;

	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(di, *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->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;

		devices = g_slist_append(devices, sdi);
	}

	g_slist_free(usb_devices);

	return std_scan_complete(di, devices);
}

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

	devc = priv;

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

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

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

	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;
	}

	return SR_OK;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	struct sr_usb_dev_inst *usb;

	usb = sdi->conn;

	if (!usb->devhdl)
		return SR_ERR_BUG;

	libusb_release_interface(usb->devhdl, USB_INTERFACE);
	libusb_close(usb->devhdl);

	usb->devhdl = NULL;

	return SR_OK;
}

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;

	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)
{
	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;

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

	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);

	std_session_send_df_header(sdi);

	devc->next_state = STATE_SAMPLE;

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
	sdi->status = SR_ST_STOPPING;

	return SR_OK;
}

static struct sr_dev_driver ikalogic_scanalogic2_driver_info = {
	.name = "ikalogic-scanalogic2",
	.longname = "IKALOGIC Scanalogic-2",
	.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_scanalogic2_driver_info);
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	static GSList scan(struct sr_dev_driver di, GSList *options)
	56	{
	57	GSList usb_devices, devices, *l;
	58	struct drv_context *drvc;
	59	struct sr_dev_inst *sdi;
	60	struct dev_context *devc;
	61	struct sr_usb_dev_inst *usb;
	62	struct device_info dev_info;
	63	unsigned int i;
	64	int ret;
	65
	66	(void)options;
	67
	68	devices = NULL;
	69	drvc = di->context;
	70
	71	usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, USB_VID_PID);
	72
	73	if (!usb_devices)
	74	return NULL;
	75
	76	for (l = usb_devices; l; l = l->next) {
	77	usb = l->data;
	78
	79	if ((ret = sl2_get_device_info(di, *usb, &dev_info)) < 0) {
	80	sr_warn("Failed to get device information: %d.", ret);
	81	sr_usb_dev_inst_free(usb);
	82	continue;
	83	}
	84
	85	devc = g_malloc0(sizeof(struct dev_context));
	86
	87	if (!(devc->xfer_in = libusb_alloc_transfer(0))) {
	88	sr_err("Transfer malloc failed.");
	89	sr_usb_dev_inst_free(usb);
	90	g_free(devc);
	91	continue;
	92	}
	93
	94	if (!(devc->xfer_out = libusb_alloc_transfer(0))) {
	95	sr_err("Transfer malloc failed.");
	96	sr_usb_dev_inst_free(usb);
	97	libusb_free_transfer(devc->xfer_in);
	98	g_free(devc);
	99	continue;
	100	}
	101
	102	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	103	sdi->status = SR_ST_INACTIVE;
	104	sdi->vendor = g_strdup(VENDOR_NAME);
	105	sdi->model = g_strdup(MODEL_NAME);
	106	sdi->version = g_strdup_printf("%u.%u", dev_info.fw_ver_major, dev_info.fw_ver_minor);
	107	sdi->serial_num = g_strdup_printf("%d", dev_info.serial);
	108	sdi->priv = devc;
	109	sdi->inst_type = SR_INST_USB;
	110	sdi->conn = usb;
	111
	112	for (i = 0; i < ARRAY_SIZE(channel_names); i++)
	113	devc->channels[i] = sr_channel_new(sdi, i,
	114	SR_CHANNEL_LOGIC, TRUE, channel_names[i]);
	115
	116	devc->state = STATE_IDLE;
	117	devc->next_state = STATE_IDLE;
	118
	119	/* Set default samplerate. */
	120	sl2_set_samplerate(sdi, DEFAULT_SAMPLERATE);
	121
	122	/* Set default capture ratio. */
	123	devc->capture_ratio = 0;
	124
	125	/* Set default after trigger delay. */
	126	devc->after_trigger_delay = 0;
	127
	128	memset(devc->xfer_buf_in, 0, LIBUSB_CONTROL_SETUP_SIZE +
	129	PACKET_LENGTH);
	130	memset(devc->xfer_buf_out, 0, LIBUSB_CONTROL_SETUP_SIZE +
	131	PACKET_LENGTH);
	132
	133	libusb_fill_control_setup(devc->xfer_buf_in,
	134	USB_REQUEST_TYPE_IN, USB_HID_GET_REPORT,
	135	USB_HID_REPORT_TYPE_FEATURE, USB_INTERFACE,
	136	PACKET_LENGTH);
	137	libusb_fill_control_setup(devc->xfer_buf_out,
	138	USB_REQUEST_TYPE_OUT, USB_HID_SET_REPORT,
	139	USB_HID_REPORT_TYPE_FEATURE, USB_INTERFACE,
	140	PACKET_LENGTH);
	141
	142	devc->xfer_data_in = devc->xfer_buf_in +
	143	LIBUSB_CONTROL_SETUP_SIZE;
	144	devc->xfer_data_out = devc->xfer_buf_out +
	145	LIBUSB_CONTROL_SETUP_SIZE;
	146
	147	devices = g_slist_append(devices, sdi);
	148	}
	149
	150	g_slist_free(usb_devices);
	151
	152	return std_scan_complete(di, devices);
	153	}
	154
	155	static void clear_helper(void *priv)
	156	{
	157	struct dev_context *devc;
	158
	159	devc = priv;
	160
	161	libusb_free_transfer(devc->xfer_in);
	162	libusb_free_transfer(devc->xfer_out);
	163	}
	164
	165	static int dev_clear(const struct sr_dev_driver *di)
	166	{
	167	return std_dev_clear_with_callback(di, clear_helper);
	168	}
	169
	170	static int dev_open(struct sr_dev_inst *sdi)
	171	{
	172	struct sr_dev_driver *di = sdi->driver;
	173	struct drv_context *drvc = di->context;
	174	struct dev_context *devc;
	175	struct sr_usb_dev_inst *usb;
	176	uint8_t buffer[PACKET_LENGTH];
	177	int ret;
	178
	179	usb = sdi->conn;
	180	devc = sdi->priv;
	181
	182	if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
	183	return SR_ERR;
	184
	185	/*
	186	* Determine if a kernel driver is active on this interface and, if so,
	187	* detach it.
	188	*/
	189	if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) {
	190	ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE);
	191	if (ret < 0) {
	192	sr_err("Failed to detach kernel driver: %s.",
	193	libusb_error_name(ret));
	194	return SR_ERR;
	195	}
	196	}
	197
	198	if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE)) < 0) {
	199	sr_err("Failed to claim interface: %s.",
	200	libusb_error_name(ret));
	201	return SR_ERR;
	202	}
	203
	204	libusb_fill_control_transfer(devc->xfer_in, usb->devhdl,
	205	devc->xfer_buf_in, sl2_receive_transfer_in,
	206	sdi, USB_TIMEOUT_MS);
	207
	208	libusb_fill_control_transfer(devc->xfer_out, usb->devhdl,
	209	devc->xfer_buf_out, sl2_receive_transfer_out,
	210	sdi, USB_TIMEOUT_MS);
	211
	212	memset(buffer, 0, sizeof(buffer));
	213
	214	buffer[0] = CMD_RESET;
	215	if ((ret = sl2_transfer_out(usb->devhdl, buffer)) != PACKET_LENGTH) {
	216	sr_err("Device reset failed: %s.", libusb_error_name(ret));
	217	return SR_ERR;
	218	}
	219
	220	/*
	221	* Set the device to idle state. If the device is not in idle state it
	222	* possibly will reset itself after a few seconds without being used
	223	* and thereby close the connection.
	224	*/
	225	buffer[0] = CMD_IDLE;
	226	if ((ret = sl2_transfer_out(usb->devhdl, buffer)) != PACKET_LENGTH) {
	227	sr_err("Failed to set device in idle state: %s.",
	228	libusb_error_name(ret));
	229	return SR_ERR;
	230	}
	231
	232	return SR_OK;
	233	}
	234
	235	static int dev_close(struct sr_dev_inst *sdi)
	236	{
	237	struct sr_usb_dev_inst *usb;
	238
	239	usb = sdi->conn;
	240
	241	if (!usb->devhdl)
	242	return SR_ERR_BUG;
	243
	244	libusb_release_interface(usb->devhdl, USB_INTERFACE);
	245	libusb_close(usb->devhdl);
	246
	247	usb->devhdl = NULL;
	248
	249	return SR_OK;
	250	}
	251
	252	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	253	const struct sr_channel_group *cg)
	254	{
	255	struct dev_context *devc;
	256	int ret;
	257
	258	(void)cg;
	259
	260	ret = SR_OK;
	261	devc = sdi->priv;
	262
	263	switch (key) {
	264	case SR_CONF_SAMPLERATE:
	265	*data = g_variant_new_uint64(devc->samplerate);
	266	break;
	267	case SR_CONF_CAPTURE_RATIO:
	268	*data = g_variant_new_uint64(devc->capture_ratio);
	269	break;
	270	default:
	271	return SR_ERR_NA;
	272	}
	273
	274	return ret;
	275	}
	276
	277	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
	278	const struct sr_channel_group *cg)
	279	{
	280	uint64_t samplerate, limit_samples, capture_ratio;
	281	int ret;
	282
	283	(void)cg;
	284
	285	switch (key) {
	286	case SR_CONF_LIMIT_SAMPLES:
	287	limit_samples = g_variant_get_uint64(data);
	288	ret = sl2_set_limit_samples(sdi, limit_samples);
	289	break;
	290	case SR_CONF_SAMPLERATE:
	291	samplerate = g_variant_get_uint64(data);
	292	ret = sl2_set_samplerate(sdi, samplerate);
	293	break;
	294	case SR_CONF_CAPTURE_RATIO:
	295	capture_ratio = g_variant_get_uint64(data);
	296	ret = sl2_set_capture_ratio(sdi, capture_ratio);
	297	break;
	298	default:
	299	return SR_ERR_NA;
	300	}
	301
	302	return ret;
	303	}
	304
	305	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	306	const struct sr_channel_group *cg)
	307	{
	308	GVariant gvar, grange[2];
	309	GVariantBuilder gvb;
	310	int ret;
	311
	312	(void)sdi;
	313	(void)cg;
	314
	315	ret = SR_OK;
	316	switch (key) {
	317	case SR_CONF_DEVICE_OPTIONS:
	318	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	319	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
	320	break;
	321	case SR_CONF_SAMPLERATE:
	322	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	323	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
	324	sl2_samplerates, ARRAY_SIZE(sl2_samplerates),
	325	sizeof(uint64_t));
	326	g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
	327	*data = g_variant_builder_end(&gvb);
	328	break;
	329	case SR_CONF_TRIGGER_MATCH:
	330	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	331	trigger_matches, ARRAY_SIZE(trigger_matches),
	332	sizeof(int32_t));
	333	break;
	334	case SR_CONF_LIMIT_SAMPLES:
	335	grange[0] = g_variant_new_uint64(0);
	336	grange[1] = g_variant_new_uint64(MAX_SAMPLES);
	337	*data = g_variant_new_tuple(grange, 2);
	338	break;
	339	default:
	340	return SR_ERR_NA;
	341	}
	342
	343	return ret;
	344	}
	345
	346	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
	347	{
	348	struct sr_dev_driver *di = sdi->driver;
	349	struct drv_context *drvc;
	350	struct dev_context *devc;
	351	uint16_t trigger_bytes, tmp;
	352	unsigned int i, j;
	353	int ret;
	354
	355	devc = sdi->priv;
	356	drvc = di->context;
	357
	358	devc->wait_data_ready_locked = TRUE;
	359	devc->stopping_in_progress = FALSE;
	360	devc->transfer_error = FALSE;
	361	devc->samples_processed = 0;
	362	devc->channel = 0;
	363	devc->sample_packet = 0;
	364
	365	/*
	366	* The trigger must be configured first because the calculation of the
	367	* pre and post trigger samples depends on a configured trigger.
	368	*/
	369	sl2_convert_trigger(sdi);
	370	sl2_calculate_trigger_samples(sdi);
	371
	372	trigger_bytes = devc->pre_trigger_bytes + devc->post_trigger_bytes;
	373
	374	/* Calculate the number of expected sample packets. */
	375	devc->num_sample_packets = trigger_bytes / PACKET_NUM_SAMPLE_BYTES;
	376
	377	/* Round up the number of expected sample packets. */
	378	if (trigger_bytes % PACKET_NUM_SAMPLE_BYTES != 0)
	379	devc->num_sample_packets++;
	380
	381	devc->num_enabled_channels = 0;
	382
	383	/*
	384	* Count the number of enabled channels and number them for a sequential
	385	* access.
	386	*/
	387	for (i = 0, j = 0; i < NUM_CHANNELS; i++) {
	388	if (devc->channels[i]->enabled) {
	389	devc->num_enabled_channels++;
	390	devc->channel_map[j] = i;
	391	j++;
	392	}
	393	}
	394
	395	sr_dbg("Number of enabled channels: %i.", devc->num_enabled_channels);
	396
	397	/* Set up the transfer buffer for the acquisition. */
	398	devc->xfer_data_out[0] = CMD_SAMPLE;
	399	devc->xfer_data_out[1] = 0x00;
	400
	401	tmp = GUINT16_TO_LE(devc->pre_trigger_bytes);
	402	memcpy(devc->xfer_data_out + 2, &tmp, sizeof(tmp));
	403
	404	tmp = GUINT16_TO_LE(devc->post_trigger_bytes);
	405	memcpy(devc->xfer_data_out + 4, &tmp, sizeof(tmp));
	406
	407	devc->xfer_data_out[6] = devc->samplerate_id;
	408	devc->xfer_data_out[7] = devc->trigger_type;
	409	devc->xfer_data_out[8] = devc->trigger_channel;
	410	devc->xfer_data_out[9] = 0x00;
	411
	412	tmp = GUINT16_TO_LE(devc->after_trigger_delay);
	413	memcpy(devc->xfer_data_out + 10, &tmp, sizeof(tmp));
	414
	415	if ((ret = libusb_submit_transfer(devc->xfer_out)) != 0) {
	416	sr_err("Submit transfer failed: %s.", libusb_error_name(ret));
	417	return SR_ERR;
	418	}
	419
	420	usb_source_add(sdi->session, drvc->sr_ctx, 100,
	421	ikalogic_scanalogic2_receive_data, (void *)sdi);
	422
	423	std_session_send_df_header(sdi);
	424
	425	devc->next_state = STATE_SAMPLE;
	426
	427	return SR_OK;
	428	}
	429
	430	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
	431	{
	432	sdi->status = SR_ST_STOPPING;
	433
	434	return SR_OK;
	435	}
	436
	437	static struct sr_dev_driver ikalogic_scanalogic2_driver_info = {
	438	.name = "ikalogic-scanalogic2",
	439	.longname = "IKALOGIC Scanalogic-2",
	440	.api_version = 1,
	441	.init = std_init,
	442	.cleanup = std_cleanup,
	443	.scan = scan,
	444	.dev_list = std_dev_list,
	445	.dev_clear = dev_clear,
	446	.config_get = config_get,
	447	.config_set = config_set,
	448	.config_list = config_list,
	449	.dev_open = dev_open,
	450	.dev_close = dev_close,
	451	.dev_acquisition_start = dev_acquisition_start,
	452	.dev_acquisition_stop = dev_acquisition_stop,
	453	.context = NULL,
	454	};
	455	SR_REGISTER_DEV_DRIVER(ikalogic_scanalogic2_driver_info);