[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 drvopts[] = {
	SR_CONF_LOGIC_ANALYZER,
};

static const uint32_t devopts[] = {
	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(struct dev_context *devc)
{
	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, (std_dev_clear_callback)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;

	switch (key) {
	case SR_CONF_DEVICE_OPTIONS:
		return STD_CONFIG_LIST(key, data, sdi, cg, NULL, drvopts, devopts);
	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 SR_OK;
}

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