[libsigrok.git] / 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 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[NUM_CHANNELS + 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_channel *ch;
	struct dev_context *devc;
	struct sr_usb_dev_inst *usb;
	struct device_info dev_info;
	int ret, i;
	char *fw_ver_str;
	char connection_id[64];

	(void)options;

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

	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(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;
		}

		usb_get_port_path(libusb_get_device(usb->devhdl),
				connection_id, sizeof(connection_id));

		sdi->priv = devc;
		sdi->driver = di;
		sdi->inst_type = SR_INST_USB;
		sdi->conn = usb;
		sdi->serial_num = g_strdup_printf("%d", dev_info.serial);
		sdi->connection_id = g_strdup(connection_id);

		for (i = 0; channel_names[i]; i++) {
			ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
				channel_names[i]);
			sdi->channels = g_slist_append(sdi->channels, ch);
			devc->channels[i] = ch;
		}

		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(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(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;

	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(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 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_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.");

	/* 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 uint32_t devopts[] = {
	23	SR_CONF_LOGIC_ANALYZER,
	24	SR_CONF_LIMIT_SAMPLES \| SR_CONF_SET \| SR_CONF_LIST,
	25	SR_CONF_SAMPLERATE \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	26	SR_CONF_TRIGGER_MATCH \| SR_CONF_LIST,
	27	SR_CONF_CAPTURE_RATIO \| SR_CONF_GET \| SR_CONF_SET,
	28	};
	29
	30	static const int32_t trigger_matches[] = {
	31	SR_TRIGGER_RISING,
	32	SR_TRIGGER_FALLING,
	33	SR_TRIGGER_EDGE,
	34	};
	35
	36	SR_PRIV const uint64_t sl2_samplerates[NUM_SAMPLERATES] = {
	37	SR_KHZ(1.25),
	38	SR_KHZ(10),
	39	SR_KHZ(50),
	40	SR_KHZ(100),
	41	SR_KHZ(250),
	42	SR_KHZ(500),
	43	SR_MHZ(1),
	44	SR_MHZ(2.5),
	45	SR_MHZ(5),
	46	SR_MHZ(10),
	47	SR_MHZ(20),
	48	};
	49
	50	static const char *channel_names[NUM_CHANNELS + 1] = {
	51	"0", "1", "2", "3",
	52	NULL,
	53	};
	54
	55	SR_PRIV struct sr_dev_driver ikalogic_scanalogic2_driver_info;
	56	static struct sr_dev_driver *di = &ikalogic_scanalogic2_driver_info;
	57
	58	static int init(struct sr_context *sr_ctx)
	59	{
	60	return std_init(sr_ctx, di, LOG_PREFIX);
	61	}
	62
	63	static GSList scan(GSList options)
	64	{
	65	GSList usb_devices, devices, *l;
	66	struct drv_context *drvc;
	67	struct sr_dev_inst *sdi;
	68	struct sr_channel *ch;
	69	struct dev_context *devc;
	70	struct sr_usb_dev_inst *usb;
	71	struct device_info dev_info;
	72	int ret, i;
	73	char *fw_ver_str;
	74	char connection_id[64];
	75
	76	(void)options;
	77
	78	devices = NULL;
	79	drvc = di->priv;
	80	drvc->instances = NULL;
	81
	82	usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, USB_VID_PID);
	83
	84	if (usb_devices == NULL)
	85	return NULL;
	86
	87	for (l = usb_devices; l; l = l->next) {
	88	usb = l->data;
	89
	90	if ((ret = sl2_get_device_info(*usb, &dev_info)) < 0) {
	91	sr_warn("Failed to get device information: %d.", ret);
	92	sr_usb_dev_inst_free(usb);
	93	continue;
	94	}
	95
	96	if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
	97	sr_err("Device instance malloc failed.");
	98	sr_usb_dev_inst_free(usb);
	99	continue;
	100	}
	101
	102	if (!(devc->xfer_in = libusb_alloc_transfer(0))) {
	103	sr_err("Transfer malloc failed.");
	104	sr_usb_dev_inst_free(usb);
	105	g_free(devc);
	106	continue;
	107	}
	108
	109	if (!(devc->xfer_out = libusb_alloc_transfer(0))) {
	110	sr_err("Transfer malloc failed.");
	111	sr_usb_dev_inst_free(usb);
	112	libusb_free_transfer(devc->xfer_in);
	113	g_free(devc);
	114	continue;
	115	}
	116
	117	fw_ver_str = g_strdup_printf("%u.%u", dev_info.fw_ver_major,
	118	dev_info.fw_ver_minor);
	119	if (!fw_ver_str) {
	120	sr_err("Firmware string malloc failed.");
	121	sr_usb_dev_inst_free(usb);
	122	libusb_free_transfer(devc->xfer_in);
	123	libusb_free_transfer(devc->xfer_out);
	124	g_free(devc);
	125	continue;
	126	}
	127
	128	sdi = sr_dev_inst_new(SR_ST_INACTIVE, VENDOR_NAME,
	129	MODEL_NAME, fw_ver_str);
	130	g_free(fw_ver_str);
	131	if (!sdi) {
	132	sr_err("sr_dev_inst_new failed.");
	133	sr_usb_dev_inst_free(usb);
	134	libusb_free_transfer(devc->xfer_in);
	135	libusb_free_transfer(devc->xfer_out);
	136	g_free(devc);
	137	continue;
	138	}
	139
	140	usb_get_port_path(libusb_get_device(usb->devhdl),
	141	connection_id, sizeof(connection_id));
	142
	143	sdi->priv = devc;
	144	sdi->driver = di;
	145	sdi->inst_type = SR_INST_USB;
	146	sdi->conn = usb;
	147	sdi->serial_num = g_strdup_printf("%d", dev_info.serial);
	148	sdi->connection_id = g_strdup(connection_id);
	149
	150	for (i = 0; channel_names[i]; i++) {
	151	ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
	152	channel_names[i]);
	153	sdi->channels = g_slist_append(sdi->channels, ch);
	154	devc->channels[i] = ch;
	155	}
	156
	157	devc->state = STATE_IDLE;
	158	devc->next_state = STATE_IDLE;
	159
	160	/* Set default samplerate. */
	161	sl2_set_samplerate(sdi, DEFAULT_SAMPLERATE);
	162
	163	/* Set default capture ratio. */
	164	devc->capture_ratio = 0;
	165
	166	/* Set default after trigger delay. */
	167	devc->after_trigger_delay = 0;
	168
	169	memset(devc->xfer_buf_in, 0, LIBUSB_CONTROL_SETUP_SIZE +
	170	PACKET_LENGTH);
	171	memset(devc->xfer_buf_out, 0, LIBUSB_CONTROL_SETUP_SIZE +
	172	PACKET_LENGTH);
	173
	174	libusb_fill_control_setup(devc->xfer_buf_in,
	175	USB_REQUEST_TYPE_IN, USB_HID_GET_REPORT,
	176	USB_HID_REPORT_TYPE_FEATURE, USB_INTERFACE,
	177	PACKET_LENGTH);
	178	libusb_fill_control_setup(devc->xfer_buf_out,
	179	USB_REQUEST_TYPE_OUT, USB_HID_SET_REPORT,
	180	USB_HID_REPORT_TYPE_FEATURE, USB_INTERFACE,
	181	PACKET_LENGTH);
	182
	183	devc->xfer_data_in = devc->xfer_buf_in +
	184	LIBUSB_CONTROL_SETUP_SIZE;
	185	devc->xfer_data_out = devc->xfer_buf_out +
	186	LIBUSB_CONTROL_SETUP_SIZE;
	187
	188	drvc->instances = g_slist_append(drvc->instances, sdi);
	189	devices = g_slist_append(devices, sdi);
	190	}
	191
	192	g_slist_free(usb_devices);
	193
	194	return devices;
	195	}
	196
	197	static GSList *dev_list(void)
	198	{
	199	return ((struct drv_context *)(di->priv))->instances;
	200	}
	201
	202	static void clear_dev_context(void *priv)
	203	{
	204	struct dev_context *devc;
	205
	206	devc = priv;
	207
	208	sr_dbg("Device context cleared.");
	209
	210	libusb_free_transfer(devc->xfer_in);
	211	libusb_free_transfer(devc->xfer_out);
	212	g_free(devc);
	213	}
	214
	215	static int dev_clear(void)
	216	{
	217	return std_dev_clear(di, &clear_dev_context);
	218	}
	219
	220	static int dev_open(struct sr_dev_inst *sdi)
	221	{
	222	struct drv_context *drvc;
	223	struct dev_context *devc;
	224	struct sr_usb_dev_inst *usb;
	225	uint8_t buffer[PACKET_LENGTH];
	226	int ret;
	227
	228	if (!(drvc = di->priv)) {
	229	sr_err("Driver was not initialized.");
	230	return SR_ERR;
	231	}
	232
	233	usb = sdi->conn;
	234	devc = sdi->priv;
	235
	236	if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
	237	return SR_ERR;
	238
	239	/*
	240	* Determine if a kernel driver is active on this interface and, if so,
	241	* detach it.
	242	*/
	243	if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) {
	244	ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE);
	245	if (ret < 0) {
	246	sr_err("Failed to detach kernel driver: %s.",
	247	libusb_error_name(ret));
	248	return SR_ERR;
	249	}
	250	}
	251
	252	if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE)) < 0) {
	253	sr_err("Failed to claim interface: %s.",
	254	libusb_error_name(ret));
	255	return SR_ERR;
	256	}
	257
	258	libusb_fill_control_transfer(devc->xfer_in, usb->devhdl,
	259	devc->xfer_buf_in, sl2_receive_transfer_in,
	260	sdi, USB_TIMEOUT);
	261
	262	libusb_fill_control_transfer(devc->xfer_out, usb->devhdl,
	263	devc->xfer_buf_out, sl2_receive_transfer_out,
	264	sdi, USB_TIMEOUT);
	265
	266	memset(buffer, 0, sizeof(buffer));
	267
	268	buffer[0] = CMD_RESET;
	269	if ((ret = sl2_transfer_out(usb->devhdl, buffer)) != PACKET_LENGTH) {
	270	sr_err("Device reset failed: %s.", libusb_error_name(ret));
	271	return SR_ERR;
	272	}
	273
	274	/*
	275	* Set the device to idle state. If the device is not in idle state it
	276	* possibly will reset itself after a few seconds without being used
	277	* and thereby close the connection.
	278	*/
	279	buffer[0] = CMD_IDLE;
	280	if ((ret = sl2_transfer_out(usb->devhdl, buffer)) != PACKET_LENGTH) {
	281	sr_err("Failed to set device in idle state: %s.",
	282	libusb_error_name(ret));
	283	return SR_ERR;
	284	}
	285
	286	sdi->status = SR_ST_ACTIVE;
	287
	288	return SR_OK;
	289	}
	290
	291	static int dev_close(struct sr_dev_inst *sdi)
	292	{
	293	struct sr_usb_dev_inst *usb;
	294
	295	if (!di->priv) {
	296	sr_err("Driver was not initialized.");
	297	return SR_ERR;
	298	}
	299
	300	usb = sdi->conn;
	301
	302	if (!usb->devhdl)
	303	return SR_OK;
	304
	305	libusb_release_interface(usb->devhdl, USB_INTERFACE);
	306	libusb_close(usb->devhdl);
	307
	308	usb->devhdl = NULL;
	309	sdi->status = SR_ST_INACTIVE;
	310
	311	return SR_OK;
	312	}
	313
	314	static int cleanup(void)
	315	{
	316	return dev_clear();
	317	}
	318
	319	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	320	const struct sr_channel_group *cg)
	321	{
	322	struct dev_context *devc;
	323	int ret;
	324
	325	(void)cg;
	326
	327	ret = SR_OK;
	328	devc = sdi->priv;
	329
	330	switch (key) {
	331	case SR_CONF_SAMPLERATE:
	332	*data = g_variant_new_uint64(devc->samplerate);
	333	break;
	334	case SR_CONF_CAPTURE_RATIO:
	335	*data = g_variant_new_uint64(devc->capture_ratio);
	336	break;
	337	default:
	338	return SR_ERR_NA;
	339	}
	340
	341	return ret;
	342	}
	343
	344	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
	345	const struct sr_channel_group *cg)
	346	{
	347	uint64_t samplerate, limit_samples, capture_ratio;
	348	int ret;
	349
	350	(void)cg;
	351
	352	if (sdi->status != SR_ST_ACTIVE)
	353	return SR_ERR_DEV_CLOSED;
	354
	355	ret = SR_OK;
	356
	357	switch (key) {
	358	case SR_CONF_LIMIT_SAMPLES:
	359	limit_samples = g_variant_get_uint64(data);
	360	ret = sl2_set_limit_samples(sdi, limit_samples);
	361	break;
	362	case SR_CONF_SAMPLERATE:
	363	samplerate = g_variant_get_uint64(data);
	364	ret = sl2_set_samplerate(sdi, samplerate);
	365	break;
	366	case SR_CONF_CAPTURE_RATIO:
	367	capture_ratio = g_variant_get_uint64(data);
	368	ret = sl2_set_capture_ratio(sdi, capture_ratio);
	369	break;
	370	default:
	371	return SR_ERR_NA;
	372	}
	373
	374	return ret;
	375	}
	376
	377	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	378	const struct sr_channel_group *cg)
	379	{
	380	GVariant gvar, grange[2];
	381	GVariantBuilder gvb;
	382	int ret;
	383
	384	(void)sdi;
	385	(void)cg;
	386
	387	ret = SR_OK;
	388
	389	switch (key) {
	390	case SR_CONF_DEVICE_OPTIONS:
	391	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	392	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
	393	break;
	394	case SR_CONF_SAMPLERATE:
	395	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	396	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
	397	sl2_samplerates, ARRAY_SIZE(sl2_samplerates),
	398	sizeof(uint64_t));
	399	g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
	400	*data = g_variant_builder_end(&gvb);
	401	break;
	402	case SR_CONF_TRIGGER_MATCH:
	403	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	404	trigger_matches, ARRAY_SIZE(trigger_matches),
	405	sizeof(int32_t));
	406	break;
	407	case SR_CONF_LIMIT_SAMPLES:
	408	grange[0] = g_variant_new_uint64(0);
	409	grange[1] = g_variant_new_uint64(MAX_SAMPLES);
	410	*data = g_variant_new_tuple(grange, 2);
	411	break;
	412	default:
	413	return SR_ERR_NA;
	414	}
	415
	416	return ret;
	417	}
	418
	419	static int dev_acquisition_start(const struct sr_dev_inst sdi, void cb_data)
	420	{
	421	struct drv_context *drvc;
	422	struct dev_context *devc;
	423	uint16_t trigger_bytes, tmp;
	424	unsigned int i, j;
	425	int ret;
	426
	427	if (sdi->status != SR_ST_ACTIVE)
	428	return SR_ERR_DEV_CLOSED;
	429
	430	devc = sdi->priv;
	431	drvc = di->priv;
	432
	433	devc->cb_data = cb_data;
	434	devc->wait_data_ready_locked = TRUE;
	435	devc->stopping_in_progress = FALSE;
	436	devc->transfer_error = FALSE;
	437	devc->samples_processed = 0;
	438	devc->channel = 0;
	439	devc->sample_packet = 0;
	440
	441	/*
	442	* The trigger must be configured first because the calculation of the
	443	* pre and post trigger samples depends on a configured trigger.
	444	*/
	445	sl2_convert_trigger(sdi);
	446	sl2_calculate_trigger_samples(sdi);
	447
	448	trigger_bytes = devc->pre_trigger_bytes + devc->post_trigger_bytes;
	449
	450	/* Calculate the number of expected sample packets. */
	451	devc->num_sample_packets = trigger_bytes / PACKET_NUM_SAMPLE_BYTES;
	452
	453	/* Round up the number of expected sample packets. */
	454	if (trigger_bytes % PACKET_NUM_SAMPLE_BYTES != 0)
	455	devc->num_sample_packets++;
	456
	457	devc->num_enabled_channels = 0;
	458
	459	/*
	460	* Count the number of enabled channels and number them for a sequential
	461	* access.
	462	*/
	463	for (i = 0, j = 0; i < NUM_CHANNELS; i++) {
	464	if (devc->channels[i]->enabled) {
	465	devc->num_enabled_channels++;
	466	devc->channel_map[j] = i;
	467	j++;
	468	}
	469	}
	470
	471	sr_dbg("Number of enabled channels: %i.", devc->num_enabled_channels);
	472
	473	/* Set up the transfer buffer for the acquisition. */
	474	devc->xfer_data_out[0] = CMD_SAMPLE;
	475	devc->xfer_data_out[1] = 0x00;
	476
	477	tmp = GUINT16_TO_LE(devc->pre_trigger_bytes);
	478	memcpy(devc->xfer_data_out + 2, &tmp, sizeof(tmp));
	479
	480	tmp = GUINT16_TO_LE(devc->post_trigger_bytes);
	481	memcpy(devc->xfer_data_out + 4, &tmp, sizeof(tmp));
	482
	483	devc->xfer_data_out[6] = devc->samplerate_id;
	484	devc->xfer_data_out[7] = devc->trigger_type;
	485	devc->xfer_data_out[8] = devc->trigger_channel;
	486	devc->xfer_data_out[9] = 0x00;
	487
	488	tmp = GUINT16_TO_LE(devc->after_trigger_delay);
	489	memcpy(devc->xfer_data_out + 10, &tmp, sizeof(tmp));
	490
	491	if ((ret = libusb_submit_transfer(devc->xfer_out)) != 0) {
	492	sr_err("Submit transfer failed: %s.", libusb_error_name(ret));
	493	return SR_ERR;
	494	}
	495
	496	usb_source_add(sdi->session, drvc->sr_ctx, 100,
	497	ikalogic_scanalogic2_receive_data, (void *)sdi);
	498
	499	sr_dbg("Acquisition started successfully.");
	500
	501	/* Send header packet to the session bus. */
	502	std_session_send_df_header(cb_data, LOG_PREFIX);
	503
	504	devc->next_state = STATE_SAMPLE;
	505
	506	return SR_OK;
	507	}
	508
	509	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	510	{
	511	(void)cb_data;
	512
	513	if (sdi->status != SR_ST_ACTIVE)
	514	return SR_ERR_DEV_CLOSED;
	515
	516	sr_dbg("Stopping acquisition.");
	517
	518	sdi->status = SR_ST_STOPPING;
	519
	520	return SR_OK;
	521	}
	522
	523	SR_PRIV struct sr_dev_driver ikalogic_scanalogic2_driver_info = {
	524	.name = "ikalogic-scanalogic2",
	525	.longname = "IKALOGIC Scanalogic-2",
	526	.api_version = 1,
	527	.init = init,
	528	.cleanup = cleanup,
	529	.scan = scan,
	530	.dev_list = dev_list,
	531	.dev_clear = dev_clear,
	532	.config_get = config_get,
	533	.config_set = config_set,
	534	.config_list = config_list,
	535	.dev_open = dev_open,
	536	.dev_close = dev_close,
	537	.dev_acquisition_start = dev_acquisition_start,
	538	.dev_acquisition_stop = dev_acquisition_stop,
	539	.priv = NULL,
	540	};