[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"

/* Scan options */
static const uint32_t scanopts[] = {
	SR_CONF_NUM_LOGIC_CHANNELS,
};

/* Hardware capabilities */
static const uint32_t devopts[] = {
	SR_CONF_LOGIC_ANALYZER,
	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,
};

/* Trigger matching capabilities */
static const int32_t soft_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;

	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;
	int i, maxch;

	/* Probe for /dev/beaglelogic */
	if (!g_file_test(BEAGLELOGIC_DEV_NODE, G_FILE_TEST_EXISTS))
		return NULL;

	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	sdi->status = SR_ST_INACTIVE;
	sdi->model = g_strdup("BeagleLogic");
	sdi->version = g_strdup("1.0");

	/* Unless explicitly specified, keep max channels to 8 only */
	maxch = 8;
	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);
	}

	/* We need to test for number of channels by opening the node */
	devc = beaglelogic_devc_alloc();

	if (beaglelogic_open_nonblock(devc) != SR_OK) {
		g_free(devc);
		sr_dev_inst_free(sdi);

		return NULL;
	}

	if (maxch > 8) {
		maxch = NUM_CHANNELS;
		devc->sampleunit = BL_SAMPLEUNIT_16_BITS;
	} else {
		maxch = 8;
		devc->sampleunit = BL_SAMPLEUNIT_8_BITS;
	}

	beaglelogic_set_sampleunit(devc);
	beaglelogic_close(devc);

	/* Signal */
	sr_info("BeagleLogic device found at "BEAGLELOGIC_DEV_NODE);

	/* 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));
}

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

	/* Open BeagleLogic */
	if (beaglelogic_open_nonblock(devc))
		return SR_ERR;

	/* Set fd and local attributes */
	devc->pollfd.fd = devc->fd;
	devc->pollfd.events = G_IO_IN;
	devc->pollfd.revents = 0;

	/* Get the default attributes */
	beaglelogic_get_samplerate(devc);
	beaglelogic_get_sampleunit(devc);
	beaglelogic_get_triggerflags(devc);
	beaglelogic_get_buffersize(devc);
	beaglelogic_get_bufunitsize(devc);

	/* Map the kernel capture FIFO for reads, saves 1 level of memcpy */
	if (beaglelogic_mmap(devc) != SR_OK) {
		sr_err("Unable to map capture buffer");
		beaglelogic_close(devc);
		return SR_ERR;
	}

	/* We're good to go now */
	sdi->status = SR_ST_ACTIVE;
	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 */
	beaglelogic_munmap(devc);
	beaglelogic_close(devc);

	sdi->status = SR_ST_INACTIVE;

	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 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) \
				"\' as root to increase the buffer size, this"\
				" capture is now truncated to %d Msamples",
				devc->buffersize /
				(SAMPLEUNIT_TO_BYTES(devc->sampleunit) * 1000000));
		}
		return beaglelogic_set_triggerflags(devc);
	case SR_CONF_CAPTURE_RATIO:
		devc->capture_ratio = g_variant_get_uint64(data);
		if (devc->capture_ratio > 100)
			return SR_ERR;
		return SR_OK;
	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)
{
	int ret;
	GVariant *gvar;
	GVariantBuilder gvb;

	(void)sdi;
	(void)cg;

	ret = SR_OK;
	switch (key) {
	case SR_CONF_SCAN_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
		break;
	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"),
			samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
		g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
		*data = g_variant_builder_end(&gvb);
		break;
	case SR_CONF_TRIGGER_MATCH:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
				soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
				sizeof(int32_t));
		break;
	default:
		return SR_ERR_NA;
	}

	return ret;
}

/* 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;
	struct sr_trigger *trigger;

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

	/* Configure channels */
	devc->sampleunit = g_slist_length(sdi->channels) > 8 ?
			BL_SAMPLEUNIT_16_BITS : BL_SAMPLEUNIT_8_BITS;
	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 */
	beaglelogic_start(devc);
	sr_session_source_add_pollfd(sdi->session, &devc->pollfd,
			BUFUNIT_TIMEOUT_MS(devc), beaglelogic_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 */
	beaglelogic_stop(devc);

	/* lseek to offset 0, flushes the cache */
	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,
	.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
bb993797 KA	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
6ec6c43b	20	#include <config.h>
bb993797	21	#include "protocol.h"
ad9dbc1c	22	#include "beaglelogic.h"
bb993797	23
138589b0 BV	24	/* Scan options */
	25	static const uint32_t scanopts[] = {
	26	SR_CONF_NUM_LOGIC_CHANNELS,
	27	};
	28
	29	/* Hardware capabilities */
f254bc4b	30	static const uint32_t devopts[] = {
ad9dbc1c	31	SR_CONF_LOGIC_ANALYZER,
ad9dbc1c	32	SR_CONF_CONTINUOUS,
5827f61b BV	33	SR_CONF_LIMIT_SAMPLES \| SR_CONF_GET \| SR_CONF_SET,
	34	SR_CONF_SAMPLERATE \| SR_CONF_GET \| SR_CONF_SET,
	35	SR_CONF_TRIGGER_MATCH \| SR_CONF_LIST,
e743a47d	36	SR_CONF_CAPTURE_RATIO \| SR_CONF_GET \| SR_CONF_SET,
5827f61b	37	SR_CONF_NUM_LOGIC_CHANNELS \| SR_CONF_GET,
ad9dbc1c KA	38	};
	39
	40	/* Trigger matching capabilities */
	41	static const int32_t soft_trigger_matches[] = {
	42	SR_TRIGGER_ZERO,
	43	SR_TRIGGER_ONE,
	44	SR_TRIGGER_RISING,
	45	SR_TRIGGER_FALLING,
	46	SR_TRIGGER_EDGE,
	47	};
	48
0f34cb47 UH	49	SR_PRIV const char *channel_names[] = {
	50	"P8_45", "P8_46", "P8_43", "P8_44", "P8_41", "P8_42", "P8_39",
	51	"P8_40", "P8_27", "P8_29", "P8_28", "P8_30", "P8_21", "P8_20",
ad9dbc1c KA	52	};
	53
	54	/* Possible sample rates : 10 Hz to 100 MHz = (100 / x) MHz */
	55	static const uint64_t samplerates[] = {
138589b0 BV	56	SR_HZ(10),
	57	SR_MHZ(100),
	58	SR_HZ(1),
ad9dbc1c KA	59	};
ad9dbc1c KA	60
f57d8ffe	61	static struct dev_context *beaglelogic_devc_alloc(void)
ad9dbc1c KA	62	{
	63	struct dev_context *devc;
	64
f57d8ffe	65	devc = g_malloc0(sizeof(struct dev_context));
ad9dbc1c KA	66
	67	/* Default non-zero values (if any) */
	68	devc->fd = -1;
	69	devc->limit_samples = (uint64_t)-1;
	70
	71	return devc;
	72	}
	73
4f840ce9	74	static GSList scan(struct sr_dev_driver di, GSList *options)
bb993797	75	{
43376f33	76	GSList *l;
ad9dbc1c KA	77	struct sr_config *src;
	78	struct sr_dev_inst *sdi;
	79	struct dev_context *devc;
ad9dbc1c	80	int i, maxch;
bb993797	81
ad9dbc1c KA	82	/* Probe for /dev/beaglelogic */
	83	if (!g_file_test(BEAGLELOGIC_DEV_NODE, G_FILE_TEST_EXISTS))
	84	return NULL;
	85
aac29cc1	86	sdi = g_malloc0(sizeof(struct sr_dev_inst));
0af636be UH	87	sdi->status = SR_ST_INACTIVE;
	88	sdi->model = g_strdup("BeagleLogic");
	89	sdi->version = g_strdup("1.0");
ad9dbc1c KA	90
	91	/* Unless explicitly specified, keep max channels to 8 only */
	92	maxch = 8;
	93	for (l = options; l; l = l->next) {
	94	src = l->data;
	95	if (src->key == SR_CONF_NUM_LOGIC_CHANNELS)
	96	maxch = g_variant_get_int32(src->data);
	97	}
	98
	99	/* We need to test for number of channels by opening the node */
	100	devc = beaglelogic_devc_alloc();
	101
	102	if (beaglelogic_open_nonblock(devc) != SR_OK) {
	103	g_free(devc);
	104	sr_dev_inst_free(sdi);
	105
	106	return NULL;
	107	}
	108
	109	if (maxch > 8) {
	110	maxch = NUM_CHANNELS;
	111	devc->sampleunit = BL_SAMPLEUNIT_16_BITS;
	112	} else {
	113	maxch = 8;
	114	devc->sampleunit = BL_SAMPLEUNIT_8_BITS;
	115	}
	116
	117	beaglelogic_set_sampleunit(devc);
	118	beaglelogic_close(devc);
	119
	120	/* Signal */
	121	sr_info("BeagleLogic device found at "BEAGLELOGIC_DEV_NODE);
	122
	123	/* Fill the channels */
5e23fcab ML	124	for (i = 0; i < maxch; i++)
5e23fcab ML	125	sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
0f34cb47	126	channel_names[i]);
ad9dbc1c KA	127
ad9dbc1c KA	128	sdi->priv = devc;
bb993797	129
43376f33	130	return std_scan_complete(di, g_slist_append(NULL, sdi));
bb993797 KA	131	}
bb993797 KA	132
bb993797 KA	133	static int dev_open(struct sr_dev_inst *sdi)
bb993797 KA	134	{
ad9dbc1c KA	135	struct dev_context *devc = sdi->priv;
	136
	137	/* Open BeagleLogic */
	138	if (beaglelogic_open_nonblock(devc))
	139	return SR_ERR;
	140
	141	/* Set fd and local attributes */
	142	devc->pollfd.fd = devc->fd;
	143	devc->pollfd.events = G_IO_IN;
89efe064	144	devc->pollfd.revents = 0;
ad9dbc1c KA	145
	146	/* Get the default attributes */
	147	beaglelogic_get_samplerate(devc);
	148	beaglelogic_get_sampleunit(devc);
	149	beaglelogic_get_triggerflags(devc);
	150	beaglelogic_get_buffersize(devc);
	151	beaglelogic_get_bufunitsize(devc);
	152
	153	/* Map the kernel capture FIFO for reads, saves 1 level of memcpy */
	154	if (beaglelogic_mmap(devc) != SR_OK) {
	155	sr_err("Unable to map capture buffer");
	156	beaglelogic_close(devc);
	157	return SR_ERR;
	158	}
bb993797	159
ad9dbc1c	160	/* We're good to go now */
bb993797	161	sdi->status = SR_ST_ACTIVE;
bb993797 KA	162	return SR_OK;
	163	}
	164
	165	static int dev_close(struct sr_dev_inst *sdi)
	166	{
ad9dbc1c	167	struct dev_context *devc = sdi->priv;
bb993797	168
093e1cba UH	169	/* Close the memory mapping and the file */
	170	beaglelogic_munmap(devc);
	171	beaglelogic_close(devc);
	172
bb993797	173	sdi->status = SR_ST_INACTIVE;
093e1cba	174
bb993797 KA	175	return SR_OK;
	176	}
	177
584560f1	178	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
bb993797 KA	179	const struct sr_channel_group *cg)
bb993797 KA	180	{
ad9dbc1c	181	struct dev_context *devc = sdi->priv;
dcd438ee	182
bb993797 KA	183	(void)cg;
bb993797 KA	184
bb993797	185	switch (key) {
ad9dbc1c KA	186	case SR_CONF_LIMIT_SAMPLES:
	187	*data = g_variant_new_uint64(devc->limit_samples);
	188	break;
ad9dbc1c KA	189	case SR_CONF_SAMPLERATE:
	190	*data = g_variant_new_uint64(devc->cur_samplerate);
	191	break;
e743a47d AJ	192	case SR_CONF_CAPTURE_RATIO:
	193	*data = g_variant_new_uint64(devc->capture_ratio);
	194	break;
ad9dbc1c KA	195	case SR_CONF_NUM_LOGIC_CHANNELS:
	196	*data = g_variant_new_uint32(g_slist_length(sdi->channels));
	197	break;
bb993797 KA	198	default:
	199	return SR_ERR_NA;
	200	}
	201
ad9dbc1c	202	return SR_OK;
bb993797 KA	203	}
bb993797 KA	204
584560f1	205	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
bb993797 KA	206	const struct sr_channel_group *cg)
bb993797 KA	207	{
ad9dbc1c KA	208	struct dev_context *devc = sdi->priv;
ad9dbc1c KA	209	uint64_t tmp_u64;
dcd438ee	210
bb993797 KA	211	(void)cg;
bb993797 KA	212
bb993797	213	switch (key) {
ad9dbc1c KA	214	case SR_CONF_SAMPLERATE:
	215	devc->cur_samplerate = g_variant_get_uint64(data);
	216	return beaglelogic_set_samplerate(devc);
ad9dbc1c KA	217	case SR_CONF_LIMIT_SAMPLES:
	218	tmp_u64 = g_variant_get_uint64(data);
	219	devc->limit_samples = tmp_u64;
	220	devc->triggerflags = BL_TRIGGERFLAGS_ONESHOT;
	221
	222	/* Check if we have sufficient buffer size */
	223	tmp_u64 *= SAMPLEUNIT_TO_BYTES(devc->sampleunit);
	224	if (tmp_u64 > devc->buffersize) {
	225	sr_warn("Insufficient buffer space has been allocated.");
	226	sr_warn("Please use \'echo <size in bytes> > "\
	227	BEAGLELOGIC_SYSFS_ATTR(memalloc) \
	228	"\' as root to increase the buffer size, this"\
	229	" capture is now truncated to %d Msamples",
	230	devc->buffersize /
	231	(SAMPLEUNIT_TO_BYTES(devc->sampleunit) * 1000000));
	232	}
	233	return beaglelogic_set_triggerflags(devc);
e743a47d AJ	234	case SR_CONF_CAPTURE_RATIO:
e743a47d AJ	235	devc->capture_ratio = g_variant_get_uint64(data);
a5c38703	236	if (devc->capture_ratio > 100)
e743a47d	237	return SR_ERR;
e743a47d	238	return SR_OK;
bb993797	239	default:
ad9dbc1c	240	return SR_ERR_NA;
bb993797 KA	241	}
bb993797 KA	242
ad9dbc1c	243	return SR_OK;
bb993797 KA	244	}
bb993797 KA	245
584560f1	246	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
bb993797 KA	247	const struct sr_channel_group *cg)
	248	{
	249	int ret;
ad9dbc1c KA	250	GVariant *gvar;
ad9dbc1c KA	251	GVariantBuilder gvb;
bb993797 KA	252
bb993797 KA	253	(void)sdi;
bb993797 KA	254	(void)cg;
	255
	256	ret = SR_OK;
	257	switch (key) {
138589b0 BV	258	case SR_CONF_SCAN_OPTIONS:
	259	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	260	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
	261	break;
ad9dbc1c	262	case SR_CONF_DEVICE_OPTIONS:
584560f1	263	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
f254bc4b	264	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
ad9dbc1c KA	265	break;
	266	case SR_CONF_SAMPLERATE:
	267	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	268	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
	269	samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
	270	g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
	271	*data = g_variant_builder_end(&gvb);
	272	break;
	273	case SR_CONF_TRIGGER_MATCH:
af945a66	274	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
ad9dbc1c KA	275	soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
	276	sizeof(int32_t));
	277	break;
bb993797 KA	278	default:
	279	return SR_ERR_NA;
	280	}
	281
	282	return ret;
	283	}
	284
ad9dbc1c KA	285	/* get a sane timeout for poll() */
	286	#define BUFUNIT_TIMEOUT_MS(devc) (100 + ((devc->bufunitsize * 1000) / \
	287	(uint32_t)(devc->cur_samplerate)))
	288
695dc859	289	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
bb993797	290	{
ad9dbc1c KA	291	struct dev_context *devc = sdi->priv;
ad9dbc1c KA	292	struct sr_trigger *trigger;
bb993797	293
ad9dbc1c KA	294	/* Clear capture state */
	295	devc->bytes_read = 0;
	296	devc->offset = 0;
	297
	298	/* Configure channels */
	299	devc->sampleunit = g_slist_length(sdi->channels) > 8 ?
	300	BL_SAMPLEUNIT_16_BITS : BL_SAMPLEUNIT_8_BITS;
	301	beaglelogic_set_sampleunit(devc);
	302
	303	/* Configure triggers & send header packet */
	304	if ((trigger = sr_session_trigger_get(sdi->session))) {
e743a47d AJ	305	int pre_trigger_samples = 0;
	306	if (devc->limit_samples > 0)
	307	pre_trigger_samples = devc->capture_ratio * devc->limit_samples/100;
	308	devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
98fec29e	309	if (!devc->stl)
e743a47d	310	return SR_ERR_MALLOC;
ad9dbc1c KA	311	devc->trigger_fired = FALSE;
	312	} else
	313	devc->trigger_fired = TRUE;
bee2b016	314	std_session_send_df_header(sdi);
ad9dbc1c KA	315
	316	/* Trigger and add poll on file */
	317	beaglelogic_start(devc);
	318	sr_session_source_add_pollfd(sdi->session, &devc->pollfd,
	319	BUFUNIT_TIMEOUT_MS(devc), beaglelogic_receive_data,
	320	(void *)sdi);
bb993797 KA	321
	322	return SR_OK;
	323	}
	324
695dc859	325	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
bb993797	326	{
ad9dbc1c	327	struct dev_context *devc = sdi->priv;
ad9dbc1c	328
ad9dbc1c KA	329	/* Execute a stop on BeagleLogic */
	330	beaglelogic_stop(devc);
	331
	332	/* lseek to offset 0, flushes the cache */
	333	lseek(devc->fd, 0, SEEK_SET);
	334
	335	/* Remove session source and send EOT packet */
	336	sr_session_source_remove_pollfd(sdi->session, &devc->pollfd);
bee2b016	337	std_session_send_df_end(sdi);
bb993797 KA	338
	339	return SR_OK;
	340	}
	341
dd5c48a6	342	static struct sr_dev_driver beaglelogic_driver_info = {
bb993797 KA	343	.name = "beaglelogic",
	344	.longname = "BeagleLogic",
	345	.api_version = 1,
c2fdcc25	346	.init = std_init,
700d6b64	347	.cleanup = std_cleanup,
bb993797	348	.scan = scan,
c01bf34c	349	.dev_list = std_dev_list,
bb993797 KA	350	.config_get = config_get,
	351	.config_set = config_set,
	352	.config_list = config_list,
	353	.dev_open = dev_open,
	354	.dev_close = dev_close,
	355	.dev_acquisition_start = dev_acquisition_start,
	356	.dev_acquisition_stop = dev_acquisition_stop,
41812aca	357	.context = NULL,
bb993797	358	};
dd5c48a6	359	SR_REGISTER_DEV_DRIVER(beaglelogic_driver_info);