[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 "protocol.h"

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

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, 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; 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);

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