[libsigrok.git] / 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 "protocol.h"

static const int hwcaps[] = {
	SR_CONF_LOGIC_ANALYZER,
	SR_CONF_SAMPLERATE,
	SR_CONF_LIMIT_SAMPLES,
	SR_CONF_TRIGGER_TYPE,
	SR_CONF_CAPTURE_RATIO,
	SR_CONF_MAX_UNCOMPRESSED_SAMPLES,
};

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 *probe_names[NUM_PROBES + 1] = {
	"0", "1", "2", "3",
	NULL,
};

SR_PRIV struct sr_dev_driver ikalogic_scanalogic2_driver_info;
static struct sr_dev_driver *di = &ikalogic_scanalogic2_driver_info;

static int init(struct sr_context *sr_ctx)
{
	return std_init(sr_ctx, di, LOG_PREFIX);
}

static GSList *scan(GSList *options)
{
	GSList *usb_devices, *devices, *l;
	struct drv_context *drvc;
	struct sr_dev_inst *sdi;
	struct sr_probe *probe;
	struct dev_context *devc;
	struct sr_usb_dev_inst *usb;
	struct device_info dev_info;
	int ret, device_index, i;
	char *fw_ver_str;

	(void)options;

	devices = NULL;
	drvc = di->priv;
	drvc->instances = NULL;
	device_index = 0;

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

	if (usb_devices == NULL)
		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;
		}

		if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
			sr_err("Device instance malloc failed.");
			sr_usb_dev_inst_free(usb);
			continue;
		}

		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;
		}

		fw_ver_str = g_strdup_printf("%u.%u", dev_info.fw_ver_major,
			dev_info.fw_ver_minor);
		if (!fw_ver_str) {
			sr_err("Firmware string malloc failed.");
			sr_usb_dev_inst_free(usb);
			libusb_free_transfer(devc->xfer_in);
			libusb_free_transfer(devc->xfer_out);
			g_free(devc);
			continue;
		}

		sdi = sr_dev_inst_new(device_index, SR_ST_INACTIVE, VENDOR_NAME,
			MODEL_NAME, fw_ver_str);
		g_free(fw_ver_str);
		if (!sdi) {
			sr_err("sr_dev_inst_new failed.");
			sr_usb_dev_inst_free(usb);
			libusb_free_transfer(devc->xfer_in);
			libusb_free_transfer(devc->xfer_out);
			g_free(devc);
			continue;
		}

		sdi->priv = devc;
		sdi->driver = di;
		sdi->inst_type = SR_INST_USB;
		sdi->conn = usb;

		for (i = 0; probe_names[i]; i++) {
			probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE,
				probe_names[i]);
			sdi->probes = g_slist_append(sdi->probes, probe);
			devc->probes[i] = probe;
		}

		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);

		device_index++;
	}

	g_slist_free(usb_devices);

	return devices;
}

static GSList *dev_list(void)
{
	return ((struct drv_context *)(di->priv))->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(void)
{
	return std_dev_clear(di, &clear_dev_context);
}

static int dev_open(struct sr_dev_inst *sdi)
{
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_usb_dev_inst *usb;
	uint8_t buffer[PACKET_LENGTH];
	int ret;

	if (!(drvc = di->priv)) {
		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);

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

	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_usb_dev_inst *usb;

	if (!di->priv) {
		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(void)
{
	return dev_clear();
}

static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_probe_group *probe_group)
{
	struct dev_context *devc;
	int ret;

	(void)probe_group;

	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;
	case SR_CONF_MAX_UNCOMPRESSED_SAMPLES:
		*data = g_variant_new_uint64(MAX_SAMPLES);
		break;
	default:
		return SR_ERR_NA;
	}

	return ret;
}

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

	(void)probe_group;

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

	ret = SR_OK;

	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(int key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_probe_group *probe_group)
{
	GVariant *gvar;
	GVariantBuilder gvb;
	int ret;

	(void)sdi;
	(void)probe_group;

	ret = SR_OK;

	switch (key) {
	case SR_CONF_DEVICE_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, hwcaps,
			ARRAY_SIZE(hwcaps), sizeof(int32_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_TYPE:
		*data = g_variant_new_string(TRIGGER_TYPES);
		break;
	default:
		return SR_ERR_NA;
	}

	return ret;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
{
	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->priv;

	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_configure_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_probes = 0;

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

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

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

	sr_dbg("Acquisition started successfully.");

	/* Send header packet to the session bus. */
	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,
	.priv = 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 "protocol.h"
	21
	22	static const int hwcaps[] = {
	23	SR_CONF_LOGIC_ANALYZER,
	24	SR_CONF_SAMPLERATE,
	25	SR_CONF_LIMIT_SAMPLES,
	26	SR_CONF_TRIGGER_TYPE,
	27	SR_CONF_CAPTURE_RATIO,
	28	SR_CONF_MAX_UNCOMPRESSED_SAMPLES,
	29	};
	30
	31	SR_PRIV const uint64_t sl2_samplerates[NUM_SAMPLERATES] = {
	32	SR_KHZ(1.25),
	33	SR_KHZ(10),
	34	SR_KHZ(50),
	35	SR_KHZ(100),
	36	SR_KHZ(250),
	37	SR_KHZ(500),
	38	SR_MHZ(1),
	39	SR_MHZ(2.5),
	40	SR_MHZ(5),
	41	SR_MHZ(10),
	42	SR_MHZ(20),
	43	};
	44
	45	static const char *probe_names[NUM_PROBES + 1] = {
	46	"0", "1", "2", "3",
	47	NULL,
	48	};
	49
	50	SR_PRIV struct sr_dev_driver ikalogic_scanalogic2_driver_info;
	51	static struct sr_dev_driver *di = &ikalogic_scanalogic2_driver_info;
	52
	53	static int init(struct sr_context *sr_ctx)
	54	{
	55	return std_init(sr_ctx, di, LOG_PREFIX);
	56	}
	57
	58	static GSList scan(GSList options)
	59	{
	60	GSList usb_devices, devices, *l;
	61	struct drv_context *drvc;
	62	struct sr_dev_inst *sdi;
	63	struct sr_probe *probe;
	64	struct dev_context *devc;
	65	struct sr_usb_dev_inst *usb;
	66	struct device_info dev_info;
	67	int ret, device_index, i;
	68	char *fw_ver_str;
	69
	70	(void)options;
	71
	72	devices = NULL;
	73	drvc = di->priv;
	74	drvc->instances = NULL;
	75	device_index = 0;
	76
	77	usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, USB_VID_PID);
	78
	79	if (usb_devices == NULL)
	80	return NULL;
	81
	82	for (l = usb_devices; l; l = l->next) {
	83	usb = l->data;
	84
	85	if ((ret = sl2_get_device_info(*usb, &dev_info)) < 0) {
	86	sr_warn("Failed to get device information: %d.", ret);
	87	sr_usb_dev_inst_free(usb);
	88	continue;
	89	}
	90
	91	if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
	92	sr_err("Device instance malloc failed.");
	93	sr_usb_dev_inst_free(usb);
	94	continue;
	95	}
	96
	97	if (!(devc->xfer_in = libusb_alloc_transfer(0))) {
	98	sr_err("Transfer malloc failed.");
	99	sr_usb_dev_inst_free(usb);
	100	g_free(devc);
	101	continue;
	102	}
	103
	104	if (!(devc->xfer_out = libusb_alloc_transfer(0))) {
	105	sr_err("Transfer malloc failed.");
	106	sr_usb_dev_inst_free(usb);
	107	libusb_free_transfer(devc->xfer_in);
	108	g_free(devc);
	109	continue;
	110	}
	111
	112	fw_ver_str = g_strdup_printf("%u.%u", dev_info.fw_ver_major,
	113	dev_info.fw_ver_minor);
	114	if (!fw_ver_str) {
	115	sr_err("Firmware string malloc failed.");
	116	sr_usb_dev_inst_free(usb);
	117	libusb_free_transfer(devc->xfer_in);
	118	libusb_free_transfer(devc->xfer_out);
	119	g_free(devc);
	120	continue;
	121	}
	122
	123	sdi = sr_dev_inst_new(device_index, SR_ST_INACTIVE, VENDOR_NAME,
	124	MODEL_NAME, fw_ver_str);
	125	g_free(fw_ver_str);
	126	if (!sdi) {
	127	sr_err("sr_dev_inst_new failed.");
	128	sr_usb_dev_inst_free(usb);
	129	libusb_free_transfer(devc->xfer_in);
	130	libusb_free_transfer(devc->xfer_out);
	131	g_free(devc);
	132	continue;
	133	}
	134
	135	sdi->priv = devc;
	136	sdi->driver = di;
	137	sdi->inst_type = SR_INST_USB;
	138	sdi->conn = usb;
	139
	140	for (i = 0; probe_names[i]; i++) {
	141	probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE,
	142	probe_names[i]);
	143	sdi->probes = g_slist_append(sdi->probes, probe);
	144	devc->probes[i] = probe;
	145	}
	146
	147	devc->state = STATE_IDLE;
	148	devc->next_state = STATE_IDLE;
	149
	150	/* Set default samplerate. */
	151	sl2_set_samplerate(sdi, DEFAULT_SAMPLERATE);
	152
	153	/* Set default capture ratio. */
	154	devc->capture_ratio = 0;
	155
	156	/* Set default after trigger delay. */
	157	devc->after_trigger_delay = 0;
	158
	159	memset(devc->xfer_buf_in, 0, LIBUSB_CONTROL_SETUP_SIZE +
	160	PACKET_LENGTH);
	161	memset(devc->xfer_buf_out, 0, LIBUSB_CONTROL_SETUP_SIZE +
	162	PACKET_LENGTH);
	163
	164	libusb_fill_control_setup(devc->xfer_buf_in,
	165	USB_REQUEST_TYPE_IN, USB_HID_GET_REPORT,
	166	USB_HID_REPORT_TYPE_FEATURE, USB_INTERFACE,
	167	PACKET_LENGTH);
	168	libusb_fill_control_setup(devc->xfer_buf_out,
	169	USB_REQUEST_TYPE_OUT, USB_HID_SET_REPORT,
	170	USB_HID_REPORT_TYPE_FEATURE, USB_INTERFACE,
	171	PACKET_LENGTH);
	172
	173	devc->xfer_data_in = devc->xfer_buf_in +
	174	LIBUSB_CONTROL_SETUP_SIZE;
	175	devc->xfer_data_out = devc->xfer_buf_out +
	176	LIBUSB_CONTROL_SETUP_SIZE;
	177
	178	drvc->instances = g_slist_append(drvc->instances, sdi);
	179	devices = g_slist_append(devices, sdi);
	180
	181	device_index++;
	182	}
	183
	184	g_slist_free(usb_devices);
	185
	186	return devices;
	187	}
	188
	189	static GSList *dev_list(void)
	190	{
	191	return ((struct drv_context *)(di->priv))->instances;
	192	}
	193
	194	static void clear_dev_context(void *priv)
	195	{
	196	struct dev_context *devc;
	197
	198	devc = priv;
	199
	200	sr_dbg("Device context cleared.");
	201
	202	libusb_free_transfer(devc->xfer_in);
	203	libusb_free_transfer(devc->xfer_out);
	204	g_free(devc);
	205	}
	206
	207	static int dev_clear(void)
	208	{
	209	return std_dev_clear(di, &clear_dev_context);
	210	}
	211
	212	static int dev_open(struct sr_dev_inst *sdi)
	213	{
	214	struct drv_context *drvc;
	215	struct dev_context *devc;
	216	struct sr_usb_dev_inst *usb;
	217	uint8_t buffer[PACKET_LENGTH];
	218	int ret;
	219
	220	if (!(drvc = di->priv)) {
	221	sr_err("Driver was not initialized.");
	222	return SR_ERR;
	223	}
	224
	225	usb = sdi->conn;
	226	devc = sdi->priv;
	227
	228	if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
	229	return SR_ERR;
	230
	231	/*
	232	* Determine if a kernel driver is active on this interface and, if so,
	233	* detach it.
	234	*/
	235	if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) {
	236	ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE);
	237	if (ret < 0) {
	238	sr_err("Failed to detach kernel driver: %s.",
	239	libusb_error_name(ret));
	240	return SR_ERR;
	241	}
	242	}
	243
	244	if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE)) < 0) {
	245	sr_err("Failed to claim interface: %s.",
	246	libusb_error_name(ret));
	247	return SR_ERR;
	248	}
	249
	250	libusb_fill_control_transfer(devc->xfer_in, usb->devhdl,
	251	devc->xfer_buf_in, sl2_receive_transfer_in,
	252	sdi, USB_TIMEOUT);
	253
	254	libusb_fill_control_transfer(devc->xfer_out, usb->devhdl,
	255	devc->xfer_buf_out, sl2_receive_transfer_out,
	256	sdi, USB_TIMEOUT);
	257
	258	memset(buffer, 0, sizeof(buffer));
	259
	260	buffer[0] = CMD_RESET;
	261	if ((ret = sl2_transfer_out(usb->devhdl, buffer)) != PACKET_LENGTH) {
	262	sr_err("Device reset failed: %s.", libusb_error_name(ret));
	263	return SR_ERR;
	264	}
	265
	266	/*
	267	* Set the device to idle state. If the device is not in idle state it
	268	* possibly will reset itself after a few seconds without being used
	269	* and thereby close the connection.
	270	*/
	271	buffer[0] = CMD_IDLE;
	272	if ((ret = sl2_transfer_out(usb->devhdl, buffer)) != PACKET_LENGTH) {
	273	sr_err("Failed to set device in idle state: %s.",
	274	libusb_error_name(ret));
	275	return SR_ERR;
	276	}
	277
	278	sdi->status = SR_ST_ACTIVE;
	279
	280	return SR_OK;
	281	}
	282
	283	static int dev_close(struct sr_dev_inst *sdi)
	284	{
	285	struct sr_usb_dev_inst *usb;
	286
	287	if (!di->priv) {
	288	sr_err("Driver was not initialized.");
	289	return SR_ERR;
	290	}
	291
	292	usb = sdi->conn;
	293
	294	if (!usb->devhdl)
	295	return SR_OK;
	296
	297	libusb_release_interface(usb->devhdl, USB_INTERFACE);
	298	libusb_close(usb->devhdl);
	299
	300	usb->devhdl = NULL;
	301	sdi->status = SR_ST_INACTIVE;
	302
	303	return SR_OK;
	304	}
	305
	306	static int cleanup(void)
	307	{
	308	return dev_clear();
	309	}
	310
	311	static int config_get(int key, GVariant *data, const struct sr_dev_inst sdi,
	312	const struct sr_probe_group *probe_group)
	313	{
	314	struct dev_context *devc;
	315	int ret;
	316
	317	(void)probe_group;
	318
	319	ret = SR_OK;
	320	devc = sdi->priv;
	321
	322	switch (key) {
	323	case SR_CONF_SAMPLERATE:
	324	*data = g_variant_new_uint64(devc->samplerate);
	325	break;
	326	case SR_CONF_CAPTURE_RATIO:
	327	*data = g_variant_new_uint64(devc->capture_ratio);
	328	break;
	329	case SR_CONF_MAX_UNCOMPRESSED_SAMPLES:
	330	*data = g_variant_new_uint64(MAX_SAMPLES);
	331	break;
	332	default:
	333	return SR_ERR_NA;
	334	}
	335
	336	return ret;
	337	}
	338
	339	static int config_set(int key, GVariant data, const struct sr_dev_inst sdi,
	340	const struct sr_probe_group *probe_group)
	341	{
	342	uint64_t samplerate, limit_samples, capture_ratio;
	343	int ret;
	344
	345	(void)probe_group;
	346
	347	if (sdi->status != SR_ST_ACTIVE)
	348	return SR_ERR_DEV_CLOSED;
	349
	350	ret = SR_OK;
	351
	352	switch (key) {
	353	case SR_CONF_LIMIT_SAMPLES:
	354	limit_samples = g_variant_get_uint64(data);
	355	ret = sl2_set_limit_samples(sdi, limit_samples);
	356	break;
	357	case SR_CONF_SAMPLERATE:
	358	samplerate = g_variant_get_uint64(data);
	359	ret = sl2_set_samplerate(sdi, samplerate);
	360	break;
	361	case SR_CONF_CAPTURE_RATIO:
	362	capture_ratio = g_variant_get_uint64(data);
	363	ret = sl2_set_capture_ratio(sdi, capture_ratio);
	364	break;
	365	default:
	366	return SR_ERR_NA;
	367	}
	368
	369	return ret;
	370	}
	371
	372	static int config_list(int key, GVariant *data, const struct sr_dev_inst sdi,
	373	const struct sr_probe_group *probe_group)
	374	{
	375	GVariant *gvar;
	376	GVariantBuilder gvb;
	377	int ret;
	378
	379	(void)sdi;
	380	(void)probe_group;
	381
	382	ret = SR_OK;
	383
	384	switch (key) {
	385	case SR_CONF_DEVICE_OPTIONS:
	386	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, hwcaps,
	387	ARRAY_SIZE(hwcaps), sizeof(int32_t));
	388	break;
	389	case SR_CONF_SAMPLERATE:
	390	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	391	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
	392	sl2_samplerates, ARRAY_SIZE(sl2_samplerates),
	393	sizeof(uint64_t));
	394	g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
	395	*data = g_variant_builder_end(&gvb);
	396	break;
	397	case SR_CONF_TRIGGER_TYPE:
	398	*data = g_variant_new_string(TRIGGER_TYPES);
	399	break;
	400	default:
	401	return SR_ERR_NA;
	402	}
	403
	404	return ret;
	405	}
	406
	407	static int dev_acquisition_start(const struct sr_dev_inst sdi, void cb_data)
	408	{
	409	struct drv_context *drvc;
	410	struct dev_context *devc;
	411	uint16_t trigger_bytes, tmp;
	412	unsigned int i, j;
	413	int ret;
	414
	415	if (sdi->status != SR_ST_ACTIVE)
	416	return SR_ERR_DEV_CLOSED;
	417
	418	devc = sdi->priv;
	419	drvc = di->priv;
	420
	421	devc->cb_data = cb_data;
	422	devc->wait_data_ready_locked = TRUE;
	423	devc->stopping_in_progress = FALSE;
	424	devc->transfer_error = FALSE;
	425	devc->samples_processed = 0;
	426	devc->channel = 0;
	427	devc->sample_packet = 0;
	428
	429	/*
	430	* The trigger must be configured first because the calculation of the
	431	* pre and post trigger samples depends on a configured trigger.
	432	*/
	433	sl2_configure_trigger(sdi);
	434	sl2_calculate_trigger_samples(sdi);
	435
	436	trigger_bytes = devc->pre_trigger_bytes + devc->post_trigger_bytes;
	437
	438	/* Calculate the number of expected sample packets. */
	439	devc->num_sample_packets = trigger_bytes / PACKET_NUM_SAMPLE_BYTES;
	440
	441	/* Round up the number of expected sample packets. */
	442	if (trigger_bytes % PACKET_NUM_SAMPLE_BYTES != 0)
	443	devc->num_sample_packets++;
	444
	445	devc->num_enabled_probes = 0;
	446
	447	/*
	448	* Count the number of enabled probes and number them for a sequential
	449	* access.
	450	*/
	451	for (i = 0, j = 0; i < NUM_PROBES; i++) {
	452	if (devc->probes[i]->enabled) {
	453	devc->num_enabled_probes++;
	454	devc->probe_map[j] = i;
	455	j++;
	456	}
	457	}
	458
	459	sr_dbg("Number of enabled probes: %i.", devc->num_enabled_probes);
	460
	461	/* Set up the transfer buffer for the acquisition. */
	462	devc->xfer_data_out[0] = CMD_SAMPLE;
	463	devc->xfer_data_out[1] = 0x00;
	464
	465	tmp = GUINT16_TO_LE(devc->pre_trigger_bytes);
	466	memcpy(devc->xfer_data_out + 2, &tmp, sizeof(tmp));
	467
	468	tmp = GUINT16_TO_LE(devc->post_trigger_bytes);
	469	memcpy(devc->xfer_data_out + 4, &tmp, sizeof(tmp));
	470
	471	devc->xfer_data_out[6] = devc->samplerate_id;
	472	devc->xfer_data_out[7] = devc->trigger_type;
	473	devc->xfer_data_out[8] = devc->trigger_channel;
	474	devc->xfer_data_out[9] = 0x00;
	475
	476	tmp = GUINT16_TO_LE(devc->after_trigger_delay);
	477	memcpy(devc->xfer_data_out + 10, &tmp, sizeof(tmp));
	478
	479	if ((ret = libusb_submit_transfer(devc->xfer_out)) != 0) {
	480	sr_err("Submit transfer failed: %s.", libusb_error_name(ret));
	481	return SR_ERR;
	482	}
	483
	484	usb_source_add(drvc->sr_ctx, 100, ikalogic_scanalogic2_receive_data, (void *)sdi);
	485
	486	sr_dbg("Acquisition started successfully.");
	487
	488	/* Send header packet to the session bus. */
	489	std_session_send_df_header(cb_data, LOG_PREFIX);
	490
	491	devc->next_state = STATE_SAMPLE;
	492
	493	return SR_OK;
	494	}
	495
	496	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	497	{
	498	(void)cb_data;
	499
	500	if (sdi->status != SR_ST_ACTIVE)
	501	return SR_ERR_DEV_CLOSED;
	502
	503	sr_dbg("Stopping acquisition.");
	504
	505	sdi->status = SR_ST_STOPPING;
	506
	507	return SR_OK;
	508	}
	509
	510	SR_PRIV struct sr_dev_driver ikalogic_scanalogic2_driver_info = {
	511	.name = "ikalogic-scanalogic2",
	512	.longname = "IKALOGIC Scanalogic-2",
	513	.api_version = 1,
	514	.init = init,
	515	.cleanup = cleanup,
	516	.scan = scan,
	517	.dev_list = dev_list,
	518	.dev_clear = dev_clear,
	519	.config_get = config_get,
	520	.config_set = config_set,
	521	.config_list = config_list,
	522	.dev_open = dev_open,
	523	.dev_close = dev_close,
	524	.dev_acquisition_start = dev_acquisition_start,
	525	.dev_acquisition_stop = dev_acquisition_stop,
	526	.priv = NULL,
	527	};