[libsigrok.git] / src / hardware / beaglelogic / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2014 Kumar Abhishek <abhishek@theembeddedkitchen.net>
 *
 * 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"
#include "beaglelogic.h"

static const uint32_t scanopts[] = {
	SR_CONF_CONN,
	SR_CONF_NUM_LOGIC_CHANNELS,
};

static const uint32_t drvopts[] = {
	SR_CONF_LOGIC_ANALYZER,
};

static const uint32_t devopts[] = {
	SR_CONF_CONTINUOUS,
	SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
	SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET,
	SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
	SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
	SR_CONF_NUM_LOGIC_CHANNELS | SR_CONF_GET,
};

static const int32_t trigger_matches[] = {
	SR_TRIGGER_ZERO,
	SR_TRIGGER_ONE,
	SR_TRIGGER_RISING,
	SR_TRIGGER_FALLING,
	SR_TRIGGER_EDGE,
};

SR_PRIV const char *channel_names[] = {
	"P8_45", "P8_46", "P8_43", "P8_44", "P8_41", "P8_42", "P8_39",
	"P8_40", "P8_27", "P8_29", "P8_28", "P8_30", "P8_21", "P8_20",
};

/* Possible sample rates : 10 Hz to 100 MHz = (100 / x) MHz */
static const uint64_t samplerates[] = {
	SR_HZ(10),
	SR_MHZ(100),
	SR_HZ(1),
};

static struct dev_context *beaglelogic_devc_alloc(void)
{
	struct dev_context *devc;

	devc = g_malloc0(sizeof(struct dev_context));

	/* Default non-zero values (if any) */
	devc->fd = -1;
	devc->limit_samples = (uint64_t)-1;
	devc->tcp_buffer = 0;

	return devc;
}

static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
	GSList *l;
	struct sr_config *src;
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	const char *conn = NULL;
	gchar **params;
	int i, maxch;

	maxch = NUM_CHANNELS;
	for (l = options; l; l = l->next) {
		src = l->data;
		if (src->key == SR_CONF_NUM_LOGIC_CHANNELS)
			maxch = g_variant_get_int32(src->data);
		if (src->key == SR_CONF_CONN)
			conn = g_variant_get_string(src->data, NULL);
	}

	/* Probe for /dev/beaglelogic if not connecting via TCP */
	if (conn == NULL) {
		if (!g_file_test(BEAGLELOGIC_DEV_NODE, G_FILE_TEST_EXISTS))
			return NULL;
	} else {
		params = g_strsplit(conn, "/", 0);
		if (!params || !params[1] || !params[2]) {
			sr_err("Invalid Parameters.");
			g_strfreev(params);
			return NULL;
		}
		if (g_ascii_strncasecmp(params[0], "tcp", 3)) {
			sr_err("Only TCP (tcp-raw) protocol is currently supported.");
			g_strfreev(params);
			return NULL;
		}
	}

	if (maxch > 8)
		maxch = NUM_CHANNELS;
	else
		maxch = 8;

	sdi = g_new0(struct sr_dev_inst, 1);
	sdi->status = SR_ST_INACTIVE;
	sdi->model = g_strdup("BeagleLogic");
	sdi->version = g_strdup("1.0");

	devc = beaglelogic_devc_alloc();

	if (conn == NULL) {
		devc->beaglelogic = &beaglelogic_native_ops;
		sr_info("BeagleLogic device found at "BEAGLELOGIC_DEV_NODE);
	} else {
		devc->read_timeout = 1000 * 1000;
		devc->beaglelogic = &beaglelogic_tcp_ops;
		devc->address = g_strdup(params[1]);
		devc->port = g_strdup(params[2]);
		g_strfreev(params);

		if (devc->beaglelogic->open(devc) != SR_OK)
			goto err_free;
		if (beaglelogic_tcp_detect(devc) != SR_OK)
			goto err_free;
		sr_info("BeagleLogic device found at %s : %s",
			devc->address, devc->port);
	}
	/* Fill the channels */
	for (i = 0; i < maxch; i++)
		sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
				channel_names[i]);

	sdi->priv = devc;

	return std_scan_complete(di, g_slist_append(NULL, sdi));
err_free:
	g_free(sdi->model);
	g_free(sdi->version);
	g_free(devc);
	g_free(sdi);

	return NULL;
}

static int dev_open(struct sr_dev_inst *sdi)
{
	struct dev_context *devc = sdi->priv;

	/* Open BeagleLogic */
	if (devc->beaglelogic == &beaglelogic_native_ops)
		if (devc->beaglelogic->open(devc))
			return SR_ERR;

	/* Set fd and local attributes */
	if (devc->beaglelogic == &beaglelogic_tcp_ops)
		devc->pollfd.fd = devc->socket;
	else
		devc->pollfd.fd = devc->fd;
	devc->pollfd.events = G_IO_IN;
	devc->pollfd.revents = 0;

	/* Get the default attributes */
	devc->beaglelogic->get_samplerate(devc);
	devc->beaglelogic->get_sampleunit(devc);
	devc->beaglelogic->get_buffersize(devc);
	devc->beaglelogic->get_bufunitsize(devc);

	/* Set the triggerflags to default for continuous capture unless we
	 * explicitly limit samples using SR_CONF_LIMIT_SAMPLES */
	devc->triggerflags = BL_TRIGGERFLAGS_CONTINUOUS;
	devc->beaglelogic->set_triggerflags(devc);

	/* Map the kernel capture FIFO for reads, saves 1 level of memcpy */
	if (devc->beaglelogic == &beaglelogic_native_ops) {
		if (devc->beaglelogic->mmap(devc) != SR_OK) {
			sr_err("Unable to map capture buffer");
			devc->beaglelogic->close(devc);
			return SR_ERR;
		}
	} else {
		devc->tcp_buffer = g_malloc(TCP_BUFFER_SIZE);
	}

	return SR_OK;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	struct dev_context *devc = sdi->priv;

	/* Close the memory mapping and the file */
	if (devc->beaglelogic == &beaglelogic_native_ops)
		devc->beaglelogic->munmap(devc);
	devc->beaglelogic->close(devc);

	if (devc->tcp_buffer)
		g_free(devc->tcp_buffer);

	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 = sdi->priv;

	(void)cg;

	switch (key) {
	case SR_CONF_LIMIT_SAMPLES:
		*data = g_variant_new_uint64(devc->limit_samples);
		break;
	case SR_CONF_SAMPLERATE:
		*data = g_variant_new_uint64(devc->cur_samplerate);
		break;
	case SR_CONF_CAPTURE_RATIO:
		*data = g_variant_new_uint64(devc->capture_ratio);
		break;
	case SR_CONF_NUM_LOGIC_CHANNELS:
		*data = g_variant_new_uint32(g_slist_length(sdi->channels));
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int config_set(uint32_t key, GVariant *data,
	const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{
	struct dev_context *devc = sdi->priv;
	uint64_t tmp_u64;

	(void)cg;

	switch (key) {
	case SR_CONF_SAMPLERATE:
		devc->cur_samplerate = g_variant_get_uint64(data);
		return devc->beaglelogic->set_samplerate(devc);
	case SR_CONF_LIMIT_SAMPLES:
		tmp_u64 = g_variant_get_uint64(data);
		devc->limit_samples = tmp_u64;
		devc->triggerflags = BL_TRIGGERFLAGS_ONESHOT;

		/* Check if we have sufficient buffer size */
		tmp_u64 *= SAMPLEUNIT_TO_BYTES(devc->sampleunit);
		if (tmp_u64 > devc->buffersize) {
			sr_warn("Insufficient buffer space has been allocated.");
			sr_warn("Please use \'echo <size in bytes> > "\
				BEAGLELOGIC_SYSFS_ATTR(memalloc) \
				"\' to increase the buffer size, this"\
				" capture is now truncated to %d Msamples",
				devc->buffersize /
				(SAMPLEUNIT_TO_BYTES(devc->sampleunit) * 1000000));
		}
		return devc->beaglelogic->set_triggerflags(devc);
	case SR_CONF_CAPTURE_RATIO:
		devc->capture_ratio = g_variant_get_uint64(data);
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int config_list(uint32_t key, GVariant **data,
	const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{
	switch (key) {
	case SR_CONF_SCAN_OPTIONS:
	case SR_CONF_DEVICE_OPTIONS:
		return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
	case SR_CONF_SAMPLERATE:
		*data = std_gvar_samplerates_steps(ARRAY_AND_SIZE(samplerates));
		break;
	case SR_CONF_TRIGGER_MATCH:
		*data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

/* get a sane timeout for poll() */
#define BUFUNIT_TIMEOUT_MS(devc)	(100 + ((devc->bufunitsize * 1000) / \
				(uint32_t)(devc->cur_samplerate)))

static int dev_acquisition_start(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc = sdi->priv;
	GSList *l;
	struct sr_trigger *trigger;
	struct sr_channel *channel;

	/* Clear capture state */
	devc->bytes_read = 0;
	devc->offset = 0;

	/* Configure channels */
	devc->sampleunit = BL_SAMPLEUNIT_8_BITS;

	for (l = sdi->channels; l; l = l->next) {
		channel = l->data;
		if (channel->index >= 8 && channel->enabled)
			devc->sampleunit = BL_SAMPLEUNIT_16_BITS;
	}
	devc->beaglelogic->set_sampleunit(devc);

	/* Configure triggers & send header packet */
	if ((trigger = sr_session_trigger_get(sdi->session))) {
		int pre_trigger_samples = 0;
		if (devc->limit_samples > 0)
			pre_trigger_samples = (devc->capture_ratio * devc->limit_samples) / 100;
		devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
		if (!devc->stl)
			return SR_ERR_MALLOC;
		devc->trigger_fired = FALSE;
	} else
		devc->trigger_fired = TRUE;
	std_session_send_df_header(sdi);

	/* Trigger and add poll on file */
	devc->beaglelogic->start(devc);
	if (devc->beaglelogic == &beaglelogic_native_ops)
		sr_session_source_add_pollfd(sdi->session, &devc->pollfd,
			BUFUNIT_TIMEOUT_MS(devc), beaglelogic_native_receive_data,
			(void *)sdi);
	else
		sr_session_source_add_pollfd(sdi->session, &devc->pollfd,
			BUFUNIT_TIMEOUT_MS(devc), beaglelogic_tcp_receive_data,
			(void *)sdi);

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
	struct dev_context *devc = sdi->priv;

	/* Execute a stop on BeagleLogic */
	devc->beaglelogic->stop(devc);

	/* lseek to offset 0, flushes the cache */
	if (devc->beaglelogic == &beaglelogic_native_ops)
		lseek(devc->fd, 0, SEEK_SET);

	/* Remove session source and send EOT packet */
	sr_session_source_remove_pollfd(sdi->session, &devc->pollfd);
	std_session_send_df_end(sdi);

	return SR_OK;
}

static struct sr_dev_driver beaglelogic_driver_info = {
	.name = "beaglelogic",
	.longname = "BeagleLogic",
	.api_version = 1,
	.init = std_init,
	.cleanup = std_cleanup,
	.scan = scan,
	.dev_list = std_dev_list,
	.dev_clear = std_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(beaglelogic_driver_info);
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2014 Kumar Abhishek <abhishek@theembeddedkitchen.net>
	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	#include "beaglelogic.h"
	23
	24	static const uint32_t scanopts[] = {
	25	SR_CONF_CONN,
	26	SR_CONF_NUM_LOGIC_CHANNELS,
	27	};
	28
	29	static const uint32_t drvopts[] = {
	30	SR_CONF_LOGIC_ANALYZER,
	31	};
	32
	33	static const uint32_t devopts[] = {
	34	SR_CONF_CONTINUOUS,
	35	SR_CONF_LIMIT_SAMPLES \| SR_CONF_GET \| SR_CONF_SET,
	36	SR_CONF_SAMPLERATE \| SR_CONF_GET \| SR_CONF_SET,
	37	SR_CONF_TRIGGER_MATCH \| SR_CONF_LIST,
	38	SR_CONF_CAPTURE_RATIO \| SR_CONF_GET \| SR_CONF_SET,
	39	SR_CONF_NUM_LOGIC_CHANNELS \| SR_CONF_GET,
	40	};
	41
	42	static const int32_t trigger_matches[] = {
	43	SR_TRIGGER_ZERO,
	44	SR_TRIGGER_ONE,
	45	SR_TRIGGER_RISING,
	46	SR_TRIGGER_FALLING,
	47	SR_TRIGGER_EDGE,
	48	};
	49
	50	SR_PRIV const char *channel_names[] = {
	51	"P8_45", "P8_46", "P8_43", "P8_44", "P8_41", "P8_42", "P8_39",
	52	"P8_40", "P8_27", "P8_29", "P8_28", "P8_30", "P8_21", "P8_20",
	53	};
	54
	55	/* Possible sample rates : 10 Hz to 100 MHz = (100 / x) MHz */
	56	static const uint64_t samplerates[] = {
	57	SR_HZ(10),
	58	SR_MHZ(100),
	59	SR_HZ(1),
	60	};
	61
	62	static struct dev_context *beaglelogic_devc_alloc(void)
	63	{
	64	struct dev_context *devc;
	65
	66	devc = g_malloc0(sizeof(struct dev_context));
	67
	68	/* Default non-zero values (if any) */
	69	devc->fd = -1;
	70	devc->limit_samples = (uint64_t)-1;
	71	devc->tcp_buffer = 0;
	72
	73	return devc;
	74	}
	75
	76	static GSList scan(struct sr_dev_driver di, GSList *options)
	77	{
	78	GSList *l;
	79	struct sr_config *src;
	80	struct sr_dev_inst *sdi;
	81	struct dev_context *devc;
	82	const char *conn = NULL;
	83	gchar **params;
	84	int i, maxch;
	85
	86	maxch = NUM_CHANNELS;
	87	for (l = options; l; l = l->next) {
	88	src = l->data;
	89	if (src->key == SR_CONF_NUM_LOGIC_CHANNELS)
	90	maxch = g_variant_get_int32(src->data);
	91	if (src->key == SR_CONF_CONN)
	92	conn = g_variant_get_string(src->data, NULL);
	93	}
	94
	95	/* Probe for /dev/beaglelogic if not connecting via TCP */
	96	if (conn == NULL) {
	97	if (!g_file_test(BEAGLELOGIC_DEV_NODE, G_FILE_TEST_EXISTS))
	98	return NULL;
	99	} else {
	100	params = g_strsplit(conn, "/", 0);
	101	if (!params \|\| !params[1] \|\| !params[2]) {
	102	sr_err("Invalid Parameters.");
	103	g_strfreev(params);
	104	return NULL;
	105	}
	106	if (g_ascii_strncasecmp(params[0], "tcp", 3)) {
	107	sr_err("Only TCP (tcp-raw) protocol is currently supported.");
	108	g_strfreev(params);
	109	return NULL;
	110	}
	111	}
	112
	113	if (maxch > 8)
	114	maxch = NUM_CHANNELS;
	115	else
	116	maxch = 8;
	117
	118	sdi = g_new0(struct sr_dev_inst, 1);
	119	sdi->status = SR_ST_INACTIVE;
	120	sdi->model = g_strdup("BeagleLogic");
	121	sdi->version = g_strdup("1.0");
	122
	123	devc = beaglelogic_devc_alloc();
	124
	125	if (conn == NULL) {
	126	devc->beaglelogic = &beaglelogic_native_ops;
	127	sr_info("BeagleLogic device found at "BEAGLELOGIC_DEV_NODE);
	128	} else {
	129	devc->read_timeout = 1000 * 1000;
	130	devc->beaglelogic = &beaglelogic_tcp_ops;
	131	devc->address = g_strdup(params[1]);
	132	devc->port = g_strdup(params[2]);
	133	g_strfreev(params);
	134
	135	if (devc->beaglelogic->open(devc) != SR_OK)
	136	goto err_free;
	137	if (beaglelogic_tcp_detect(devc) != SR_OK)
	138	goto err_free;
	139	sr_info("BeagleLogic device found at %s : %s",
	140	devc->address, devc->port);
	141	}
	142	/* Fill the channels */
	143	for (i = 0; i < maxch; i++)
	144	sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
	145	channel_names[i]);
	146
	147	sdi->priv = devc;
	148
	149	return std_scan_complete(di, g_slist_append(NULL, sdi));
	150	err_free:
	151	g_free(sdi->model);
	152	g_free(sdi->version);
	153	g_free(devc);
	154	g_free(sdi);
	155
	156	return NULL;
	157	}
	158
	159	static int dev_open(struct sr_dev_inst *sdi)
	160	{
	161	struct dev_context *devc = sdi->priv;
	162
	163	/* Open BeagleLogic */
	164	if (devc->beaglelogic == &beaglelogic_native_ops)
	165	if (devc->beaglelogic->open(devc))
	166	return SR_ERR;
	167
	168	/* Set fd and local attributes */
	169	if (devc->beaglelogic == &beaglelogic_tcp_ops)
	170	devc->pollfd.fd = devc->socket;
	171	else
	172	devc->pollfd.fd = devc->fd;
	173	devc->pollfd.events = G_IO_IN;
	174	devc->pollfd.revents = 0;
	175
	176	/* Get the default attributes */
	177	devc->beaglelogic->get_samplerate(devc);
	178	devc->beaglelogic->get_sampleunit(devc);
	179	devc->beaglelogic->get_buffersize(devc);
	180	devc->beaglelogic->get_bufunitsize(devc);
	181
	182	/* Set the triggerflags to default for continuous capture unless we
	183	* explicitly limit samples using SR_CONF_LIMIT_SAMPLES */
	184	devc->triggerflags = BL_TRIGGERFLAGS_CONTINUOUS;
	185	devc->beaglelogic->set_triggerflags(devc);
	186
	187	/* Map the kernel capture FIFO for reads, saves 1 level of memcpy */
	188	if (devc->beaglelogic == &beaglelogic_native_ops) {
	189	if (devc->beaglelogic->mmap(devc) != SR_OK) {
	190	sr_err("Unable to map capture buffer");
	191	devc->beaglelogic->close(devc);
	192	return SR_ERR;
	193	}
	194	} else {
	195	devc->tcp_buffer = g_malloc(TCP_BUFFER_SIZE);
	196	}
	197
	198	return SR_OK;
	199	}
	200
	201	static int dev_close(struct sr_dev_inst *sdi)
	202	{
	203	struct dev_context *devc = sdi->priv;
	204
	205	/* Close the memory mapping and the file */
	206	if (devc->beaglelogic == &beaglelogic_native_ops)
	207	devc->beaglelogic->munmap(devc);
	208	devc->beaglelogic->close(devc);
	209
	210	if (devc->tcp_buffer)
	211	g_free(devc->tcp_buffer);
	212
	213	return SR_OK;
	214	}
	215
	216	static int config_get(uint32_t key, GVariant **data,
	217	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
	218	{
	219	struct dev_context *devc = sdi->priv;
	220
	221	(void)cg;
	222
	223	switch (key) {
	224	case SR_CONF_LIMIT_SAMPLES:
	225	*data = g_variant_new_uint64(devc->limit_samples);
	226	break;
	227	case SR_CONF_SAMPLERATE:
	228	*data = g_variant_new_uint64(devc->cur_samplerate);
	229	break;
	230	case SR_CONF_CAPTURE_RATIO:
	231	*data = g_variant_new_uint64(devc->capture_ratio);
	232	break;
	233	case SR_CONF_NUM_LOGIC_CHANNELS:
	234	*data = g_variant_new_uint32(g_slist_length(sdi->channels));
	235	break;
	236	default:
	237	return SR_ERR_NA;
	238	}
	239
	240	return SR_OK;
	241	}
	242
	243	static int config_set(uint32_t key, GVariant *data,
	244	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
	245	{
	246	struct dev_context *devc = sdi->priv;
	247	uint64_t tmp_u64;
	248
	249	(void)cg;
	250
	251	switch (key) {
	252	case SR_CONF_SAMPLERATE:
	253	devc->cur_samplerate = g_variant_get_uint64(data);
	254	return devc->beaglelogic->set_samplerate(devc);
	255	case SR_CONF_LIMIT_SAMPLES:
	256	tmp_u64 = g_variant_get_uint64(data);
	257	devc->limit_samples = tmp_u64;
	258	devc->triggerflags = BL_TRIGGERFLAGS_ONESHOT;
	259
	260	/* Check if we have sufficient buffer size */
	261	tmp_u64 *= SAMPLEUNIT_TO_BYTES(devc->sampleunit);
	262	if (tmp_u64 > devc->buffersize) {
	263	sr_warn("Insufficient buffer space has been allocated.");
	264	sr_warn("Please use \'echo <size in bytes> > "\
	265	BEAGLELOGIC_SYSFS_ATTR(memalloc) \
	266	"\' to increase the buffer size, this"\
	267	" capture is now truncated to %d Msamples",
	268	devc->buffersize /
	269	(SAMPLEUNIT_TO_BYTES(devc->sampleunit) * 1000000));
	270	}
	271	return devc->beaglelogic->set_triggerflags(devc);
	272	case SR_CONF_CAPTURE_RATIO:
	273	devc->capture_ratio = g_variant_get_uint64(data);
	274	break;
	275	default:
	276	return SR_ERR_NA;
	277	}
	278
	279	return SR_OK;
	280	}
	281
	282	static int config_list(uint32_t key, GVariant **data,
	283	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
	284	{
	285	switch (key) {
	286	case SR_CONF_SCAN_OPTIONS:
	287	case SR_CONF_DEVICE_OPTIONS:
	288	return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
	289	case SR_CONF_SAMPLERATE:
	290	*data = std_gvar_samplerates_steps(ARRAY_AND_SIZE(samplerates));
	291	break;
	292	case SR_CONF_TRIGGER_MATCH:
	293	*data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
	294	break;
	295	default:
	296	return SR_ERR_NA;
	297	}
	298
	299	return SR_OK;
	300	}
	301
	302	/* get a sane timeout for poll() */
	303	#define BUFUNIT_TIMEOUT_MS(devc) (100 + ((devc->bufunitsize * 1000) / \
	304	(uint32_t)(devc->cur_samplerate)))
	305
	306	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
	307	{
	308	struct dev_context *devc = sdi->priv;
	309	GSList *l;
	310	struct sr_trigger *trigger;
	311	struct sr_channel *channel;
	312
	313	/* Clear capture state */
	314	devc->bytes_read = 0;
	315	devc->offset = 0;
	316
	317	/* Configure channels */
	318	devc->sampleunit = BL_SAMPLEUNIT_8_BITS;
	319
	320	for (l = sdi->channels; l; l = l->next) {
	321	channel = l->data;
	322	if (channel->index >= 8 && channel->enabled)
	323	devc->sampleunit = BL_SAMPLEUNIT_16_BITS;
	324	}
	325	devc->beaglelogic->set_sampleunit(devc);
	326
	327	/* Configure triggers & send header packet */
	328	if ((trigger = sr_session_trigger_get(sdi->session))) {
	329	int pre_trigger_samples = 0;
	330	if (devc->limit_samples > 0)
	331	pre_trigger_samples = (devc->capture_ratio * devc->limit_samples) / 100;
	332	devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
	333	if (!devc->stl)
	334	return SR_ERR_MALLOC;
	335	devc->trigger_fired = FALSE;
	336	} else
	337	devc->trigger_fired = TRUE;
	338	std_session_send_df_header(sdi);
	339
	340	/* Trigger and add poll on file */
	341	devc->beaglelogic->start(devc);
	342	if (devc->beaglelogic == &beaglelogic_native_ops)
	343	sr_session_source_add_pollfd(sdi->session, &devc->pollfd,
	344	BUFUNIT_TIMEOUT_MS(devc), beaglelogic_native_receive_data,
	345	(void *)sdi);
	346	else
	347	sr_session_source_add_pollfd(sdi->session, &devc->pollfd,
	348	BUFUNIT_TIMEOUT_MS(devc), beaglelogic_tcp_receive_data,
	349	(void *)sdi);
	350
	351	return SR_OK;
	352	}
	353
	354	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
	355	{
	356	struct dev_context *devc = sdi->priv;
	357
	358	/* Execute a stop on BeagleLogic */
	359	devc->beaglelogic->stop(devc);
	360
	361	/* lseek to offset 0, flushes the cache */
	362	if (devc->beaglelogic == &beaglelogic_native_ops)
	363	lseek(devc->fd, 0, SEEK_SET);
	364
	365	/* Remove session source and send EOT packet */
	366	sr_session_source_remove_pollfd(sdi->session, &devc->pollfd);
	367	std_session_send_df_end(sdi);
	368
	369	return SR_OK;
	370	}
	371
	372	static struct sr_dev_driver beaglelogic_driver_info = {
	373	.name = "beaglelogic",
	374	.longname = "BeagleLogic",
	375	.api_version = 1,
	376	.init = std_init,
	377	.cleanup = std_cleanup,
	378	.scan = scan,
	379	.dev_list = std_dev_list,
	380	.dev_clear = std_dev_clear,
	381	.config_get = config_get,
	382	.config_set = config_set,
	383	.config_list = config_list,
	384	.dev_open = dev_open,
	385	.dev_close = dev_close,
	386	.dev_acquisition_start = dev_acquisition_start,
	387	.dev_acquisition_stop = dev_acquisition_stop,
	388	.context = NULL,
	389	};
	390	SR_REGISTER_DEV_DRIVER(beaglelogic_driver_info);