[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_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;

	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;

	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 (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();

	for (i = 0; i < maxch; i++)
		sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
				channel_names[i]);

	sdi->priv = devc;

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

	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_buffersize(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;
	beaglelogic_set_triggerflags(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;
	}

	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);

	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) \
				"\' 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);
		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;
	}
	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,
	.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
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	static const uint32_t scanopts[] = {
	25	SR_CONF_NUM_LOGIC_CHANNELS,
	26	};
	27
05199c0a UH	28	static const uint32_t drvopts[] = {
	29	SR_CONF_LOGIC_ANALYZER,
	30	};
	31
f254bc4b	32	static const uint32_t devopts[] = {
ad9dbc1c	33	SR_CONF_CONTINUOUS,
5827f61b BV	34	SR_CONF_LIMIT_SAMPLES \| SR_CONF_GET \| SR_CONF_SET,
	35	SR_CONF_SAMPLERATE \| SR_CONF_GET \| SR_CONF_SET,
	36	SR_CONF_TRIGGER_MATCH \| SR_CONF_LIST,
e743a47d	37	SR_CONF_CAPTURE_RATIO \| SR_CONF_GET \| SR_CONF_SET,
5827f61b	38	SR_CONF_NUM_LOGIC_CHANNELS \| SR_CONF_GET,
ad9dbc1c KA	39	};
ad9dbc1c KA	40
76d10d13	41	static const int32_t trigger_matches[] = {
ad9dbc1c KA	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
6eab3021	86	maxch = NUM_CHANNELS;
ad9dbc1c KA	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	}
	92
6eab3021	93	if (maxch > 8)
ad9dbc1c	94	maxch = NUM_CHANNELS;
6eab3021	95	else
ad9dbc1c	96	maxch = 8;
ad9dbc1c	97
6eab3021 KA	98	sdi = g_new0(struct sr_dev_inst, 1);
	99	sdi->status = SR_ST_INACTIVE;
	100	sdi->model = g_strdup("BeagleLogic");
	101	sdi->version = g_strdup("1.0");
ad9dbc1c	102
6eab3021	103	devc = beaglelogic_devc_alloc();
ad9dbc1c	104
5e23fcab ML	105	for (i = 0; i < maxch; i++)
5e23fcab ML	106	sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
0f34cb47	107	channel_names[i]);
ad9dbc1c KA	108
ad9dbc1c KA	109	sdi->priv = devc;
bb993797	110
6eab3021 KA	111	/* Signal */
	112	sr_info("BeagleLogic device found at "BEAGLELOGIC_DEV_NODE);
	113
43376f33	114	return std_scan_complete(di, g_slist_append(NULL, sdi));
bb993797 KA	115	}
bb993797 KA	116
bb993797 KA	117	static int dev_open(struct sr_dev_inst *sdi)
bb993797 KA	118	{
ad9dbc1c KA	119	struct dev_context *devc = sdi->priv;
	120
	121	/* Open BeagleLogic */
	122	if (beaglelogic_open_nonblock(devc))
	123	return SR_ERR;
	124
	125	/* Set fd and local attributes */
	126	devc->pollfd.fd = devc->fd;
	127	devc->pollfd.events = G_IO_IN;
89efe064	128	devc->pollfd.revents = 0;
ad9dbc1c KA	129
	130	/* Get the default attributes */
	131	beaglelogic_get_samplerate(devc);
	132	beaglelogic_get_sampleunit(devc);
ad9dbc1c KA	133	beaglelogic_get_buffersize(devc);
	134	beaglelogic_get_bufunitsize(devc);
	135
713f3f84 KA	136	/* Set the triggerflags to default for continuous capture unless we
	137	* explicitly limit samples using SR_CONF_LIMIT_SAMPLES */
	138	devc->triggerflags = BL_TRIGGERFLAGS_CONTINUOUS;
	139	beaglelogic_set_triggerflags(devc);
	140
ad9dbc1c KA	141	/* Map the kernel capture FIFO for reads, saves 1 level of memcpy */
	142	if (beaglelogic_mmap(devc) != SR_OK) {
	143	sr_err("Unable to map capture buffer");
	144	beaglelogic_close(devc);
	145	return SR_ERR;
	146	}
bb993797	147
bb993797 KA	148	return SR_OK;
	149	}
	150
	151	static int dev_close(struct sr_dev_inst *sdi)
	152	{
ad9dbc1c	153	struct dev_context *devc = sdi->priv;
bb993797	154
093e1cba UH	155	/* Close the memory mapping and the file */
	156	beaglelogic_munmap(devc);
	157	beaglelogic_close(devc);
	158
bb993797 KA	159	return SR_OK;
	160	}
	161
dd7a72ea UH	162	static int config_get(uint32_t key, GVariant **data,
dd7a72ea UH	163	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
bb993797	164	{
ad9dbc1c	165	struct dev_context *devc = sdi->priv;
dcd438ee	166
bb993797 KA	167	(void)cg;
bb993797 KA	168
bb993797	169	switch (key) {
ad9dbc1c KA	170	case SR_CONF_LIMIT_SAMPLES:
	171	*data = g_variant_new_uint64(devc->limit_samples);
	172	break;
ad9dbc1c KA	173	case SR_CONF_SAMPLERATE:
	174	*data = g_variant_new_uint64(devc->cur_samplerate);
	175	break;
e743a47d AJ	176	case SR_CONF_CAPTURE_RATIO:
	177	*data = g_variant_new_uint64(devc->capture_ratio);
	178	break;
ad9dbc1c KA	179	case SR_CONF_NUM_LOGIC_CHANNELS:
	180	*data = g_variant_new_uint32(g_slist_length(sdi->channels));
	181	break;
bb993797 KA	182	default:
	183	return SR_ERR_NA;
	184	}
	185
ad9dbc1c	186	return SR_OK;
bb993797 KA	187	}
bb993797 KA	188
dd7a72ea UH	189	static int config_set(uint32_t key, GVariant *data,
dd7a72ea UH	190	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
bb993797	191	{
ad9dbc1c KA	192	struct dev_context *devc = sdi->priv;
ad9dbc1c KA	193	uint64_t tmp_u64;
dcd438ee	194
bb993797 KA	195	(void)cg;
bb993797 KA	196
bb993797	197	switch (key) {
ad9dbc1c KA	198	case SR_CONF_SAMPLERATE:
	199	devc->cur_samplerate = g_variant_get_uint64(data);
	200	return beaglelogic_set_samplerate(devc);
ad9dbc1c KA	201	case SR_CONF_LIMIT_SAMPLES:
	202	tmp_u64 = g_variant_get_uint64(data);
	203	devc->limit_samples = tmp_u64;
	204	devc->triggerflags = BL_TRIGGERFLAGS_ONESHOT;
	205
	206	/* Check if we have sufficient buffer size */
	207	tmp_u64 *= SAMPLEUNIT_TO_BYTES(devc->sampleunit);
	208	if (tmp_u64 > devc->buffersize) {
	209	sr_warn("Insufficient buffer space has been allocated.");
	210	sr_warn("Please use \'echo <size in bytes> > "\
	211	BEAGLELOGIC_SYSFS_ATTR(memalloc) \
55f26c42	212	"\' to increase the buffer size, this"\
ad9dbc1c KA	213	" capture is now truncated to %d Msamples",
	214	devc->buffersize /
	215	(SAMPLEUNIT_TO_BYTES(devc->sampleunit) * 1000000));
	216	}
	217	return beaglelogic_set_triggerflags(devc);
e743a47d AJ	218	case SR_CONF_CAPTURE_RATIO:
e743a47d AJ	219	devc->capture_ratio = g_variant_get_uint64(data);
efad7ccc	220	break;
bb993797	221	default:
ad9dbc1c	222	return SR_ERR_NA;
bb993797 KA	223	}
bb993797 KA	224
ad9dbc1c	225	return SR_OK;
bb993797 KA	226	}
bb993797 KA	227
dd7a72ea UH	228	static int config_list(uint32_t key, GVariant **data,
dd7a72ea UH	229	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
bb993797	230	{
bb993797	231	switch (key) {
138589b0	232	case SR_CONF_SCAN_OPTIONS:
ad9dbc1c	233	case SR_CONF_DEVICE_OPTIONS:
05199c0a	234	return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
ad9dbc1c	235	case SR_CONF_SAMPLERATE:
53012da6	236	*data = std_gvar_samplerates_steps(ARRAY_AND_SIZE(samplerates));
ad9dbc1c KA	237	break;
ad9dbc1c KA	238	case SR_CONF_TRIGGER_MATCH:
76d10d13	239	*data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
ad9dbc1c	240	break;
bb993797 KA	241	default:
	242	return SR_ERR_NA;
	243	}
	244
a9010323	245	return SR_OK;
bb993797 KA	246	}
bb993797 KA	247
ad9dbc1c KA	248	/* get a sane timeout for poll() */
	249	#define BUFUNIT_TIMEOUT_MS(devc) (100 + ((devc->bufunitsize * 1000) / \
	250	(uint32_t)(devc->cur_samplerate)))
	251
695dc859	252	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
bb993797	253	{
ad9dbc1c	254	struct dev_context *devc = sdi->priv;
e71062d9	255	GSList *l;
ad9dbc1c	256	struct sr_trigger *trigger;
e71062d9	257	struct sr_channel *channel;
bb993797	258
ad9dbc1c KA	259	/* Clear capture state */
	260	devc->bytes_read = 0;
	261	devc->offset = 0;
	262
	263	/* Configure channels */
e71062d9 KA	264	devc->sampleunit = BL_SAMPLEUNIT_8_BITS;
	265
	266	for (l = sdi->channels; l; l = l->next) {
	267	channel = l->data;
	268	if (channel->index >= 8 && channel->enabled)
	269	devc->sampleunit = BL_SAMPLEUNIT_16_BITS;
	270	}
ad9dbc1c KA	271	beaglelogic_set_sampleunit(devc);
	272
	273	/* Configure triggers & send header packet */
	274	if ((trigger = sr_session_trigger_get(sdi->session))) {
e743a47d AJ	275	int pre_trigger_samples = 0;
e743a47d AJ	276	if (devc->limit_samples > 0)
efad7ccc	277	pre_trigger_samples = (devc->capture_ratio * devc->limit_samples) / 100;
e743a47d	278	devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
98fec29e	279	if (!devc->stl)
e743a47d	280	return SR_ERR_MALLOC;
ad9dbc1c KA	281	devc->trigger_fired = FALSE;
	282	} else
	283	devc->trigger_fired = TRUE;
bee2b016	284	std_session_send_df_header(sdi);
ad9dbc1c KA	285
	286	/* Trigger and add poll on file */
	287	beaglelogic_start(devc);
	288	sr_session_source_add_pollfd(sdi->session, &devc->pollfd,
	289	BUFUNIT_TIMEOUT_MS(devc), beaglelogic_receive_data,
	290	(void *)sdi);
bb993797 KA	291
	292	return SR_OK;
	293	}
	294
695dc859	295	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
bb993797	296	{
ad9dbc1c	297	struct dev_context *devc = sdi->priv;
ad9dbc1c	298
ad9dbc1c KA	299	/* Execute a stop on BeagleLogic */
	300	beaglelogic_stop(devc);
	301
	302	/* lseek to offset 0, flushes the cache */
	303	lseek(devc->fd, 0, SEEK_SET);
	304
	305	/* Remove session source and send EOT packet */
	306	sr_session_source_remove_pollfd(sdi->session, &devc->pollfd);
bee2b016	307	std_session_send_df_end(sdi);
bb993797 KA	308
	309	return SR_OK;
	310	}
	311
dd5c48a6	312	static struct sr_dev_driver beaglelogic_driver_info = {
bb993797 KA	313	.name = "beaglelogic",
	314	.longname = "BeagleLogic",
	315	.api_version = 1,
c2fdcc25	316	.init = std_init,
700d6b64	317	.cleanup = std_cleanup,
bb993797	318	.scan = scan,
c01bf34c	319	.dev_list = std_dev_list,
f778bf02	320	.dev_clear = std_dev_clear,
bb993797 KA	321	.config_get = config_get,
	322	.config_set = config_set,
	323	.config_list = config_list,
	324	.dev_open = dev_open,
	325	.dev_close = dev_close,
	326	.dev_acquisition_start = dev_acquisition_start,
	327	.dev_acquisition_stop = dev_acquisition_stop,
41812aca	328	.context = NULL,
bb993797	329	};
dd5c48a6	330	SR_REGISTER_DEV_DRIVER(beaglelogic_driver_info);