[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 "protocol.h"
#include "beaglelogic.h"

SR_PRIV struct sr_dev_driver beaglelogic_driver_info;
static struct sr_dev_driver *di = &beaglelogic_driver_info;

/* Hardware capabiities */
static const uint32_t hwcaps[] = {
	SR_CONF_LOGIC_ANALYZER,
	SR_CONF_SAMPLERATE,
	SR_CONF_TRIGGER_MATCH,

	SR_CONF_LIMIT_SAMPLES,
	SR_CONF_CONTINUOUS,

	SR_CONF_NUM_LOGIC_CHANNELS,
};

/* 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,
};

/* Channels are numbered 0-13 */
SR_PRIV const char *beaglelogic_channel_names[NUM_CHANNELS + 1] = {
	"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", NULL,
};

/* 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 int init(struct sr_context *sr_ctx)
{
	return std_init(sr_ctx, di, LOG_PREFIX);
}

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

	/* Allocate zeroed structure */
	devc = g_try_malloc0(sizeof(*devc));

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

	return devc;
}

static GSList *scan(GSList *options)
{
	struct drv_context *drvc;
	GSList *devices, *l;
	struct sr_config *src;
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	struct sr_channel *ch;
	int i, maxch;

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

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

	sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, NULL, "BeagleLogic", "1.0");
	sdi->driver = di;

	/* 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++) {
		if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
				beaglelogic_channel_names[i])))
			return NULL;
		sdi->channels = g_slist_append(sdi->channels, ch);
	}

	sdi->priv = devc;
	drvc->instances = g_slist_append(drvc->instances, sdi);
	devices = g_slist_append(devices, sdi);

	return devices;
}

static GSList *dev_list(void)
{
	return ((struct drv_context *)(di->priv))->instances;
}

static int dev_clear(void)
{
	return std_dev_clear(di, NULL);
}

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;

	/* 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;

	if (sdi->status == SR_ST_ACTIVE) {
		/* Close the memory mapping and the file */
		beaglelogic_munmap(devc);
		beaglelogic_close(devc);
	}
	sdi->status = SR_ST_INACTIVE;
	return SR_OK;
}

static int cleanup(void)
{
	struct drv_context *drvc;
	struct sr_dev_inst *sdi;
	GSList *l;

	/* unused driver */
	if (!(drvc = di->priv))
		return SR_OK;

	/* Clean up the instances */
	for (l = drvc->instances; l; l = l->next) {
		sdi = l->data;
		di->dev_close(sdi);
		g_free(sdi->priv);
		sr_dev_inst_free(sdi);
	}
	g_slist_free(drvc->instances);
	drvc->instances = NULL;

	di->priv = NULL;

	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_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;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	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);

	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)data;
	(void)cg;

	ret = SR_OK;
	switch (key) {
	case SR_CONF_DEVICE_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				hwcaps, ARRAY_SIZE(hwcaps), 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_UINT32,
				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,
				    void *cb_data)
{
	(void)cb_data;
	struct dev_context *devc = sdi->priv;
	struct sr_trigger *trigger;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	/* Save user pointer */
	devc->cb_data = cb_data;

	/* 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))) {
		devc->stl = soft_trigger_logic_new(sdi, trigger);
		devc->trigger_fired = FALSE;
	} else
		devc->trigger_fired = TRUE;
	std_session_send_df_header(cb_data, LOG_PREFIX);

	/* 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, void *cb_data)
{
	struct dev_context *devc = sdi->priv;
	struct sr_datafeed_packet pkt;

	(void)cb_data;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	/* 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);
	pkt.type = SR_DF_END;
	pkt.payload = NULL;
	sr_session_send(sdi, &pkt);

	return SR_OK;
}

SR_PRIV struct sr_dev_driver beaglelogic_driver_info = {
	.name = "beaglelogic",
	.longname = "BeagleLogic",
	.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
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
	20	#include "protocol.h"
ad9dbc1c	21	#include "beaglelogic.h"
bb993797 KA	22
	23	SR_PRIV struct sr_dev_driver beaglelogic_driver_info;
	24	static struct sr_dev_driver *di = &beaglelogic_driver_info;
	25
ad9dbc1c	26	/* Hardware capabiities */
584560f1	27	static const uint32_t hwcaps[] = {
ad9dbc1c KA	28	SR_CONF_LOGIC_ANALYZER,
	29	SR_CONF_SAMPLERATE,
	30	SR_CONF_TRIGGER_MATCH,
	31
	32	SR_CONF_LIMIT_SAMPLES,
	33	SR_CONF_CONTINUOUS,
	34
	35	SR_CONF_NUM_LOGIC_CHANNELS,
	36	};
	37
	38	/* Trigger matching capabilities */
	39	static const int32_t soft_trigger_matches[] = {
	40	SR_TRIGGER_ZERO,
	41	SR_TRIGGER_ONE,
	42	SR_TRIGGER_RISING,
	43	SR_TRIGGER_FALLING,
	44	SR_TRIGGER_EDGE,
	45	};
	46
	47	/* Channels are numbered 0-13 */
	48	SR_PRIV const char *beaglelogic_channel_names[NUM_CHANNELS + 1] = {
	49	"P8_45", "P8_46", "P8_43", "P8_44", "P8_41", "P8_42", "P8_39", "P8_40",
	50	"P8_27", "P8_29", "P8_28", "P8_30", "P8_21", "P8_20", NULL,
	51	};
	52
	53	/* Possible sample rates : 10 Hz to 100 MHz = (100 / x) MHz */
	54	static const uint64_t samplerates[] = {
	55	SR_HZ(10),
	56	SR_MHZ(100),
	57	SR_HZ(1),
	58	};
	59
bb993797 KA	60	static int init(struct sr_context *sr_ctx)
	61	{
	62	return std_init(sr_ctx, di, LOG_PREFIX);
	63	}
	64
ad9dbc1c KA	65	static struct dev_context * beaglelogic_devc_alloc(void)
	66	{
	67	struct dev_context *devc;
	68
	69	/* Allocate zeroed structure */
	70	devc = g_try_malloc0(sizeof(*devc));
	71
	72	/* Default non-zero values (if any) */
	73	devc->fd = -1;
	74	devc->limit_samples = (uint64_t)-1;
	75
	76	return devc;
	77	}
	78
bb993797 KA	79	static GSList scan(GSList options)
	80	{
	81	struct drv_context *drvc;
ad9dbc1c KA	82	GSList devices, l;
	83	struct sr_config *src;
	84	struct sr_dev_inst *sdi;
	85	struct dev_context *devc;
	86	struct sr_channel *ch;
	87	int i, maxch;
bb993797 KA	88
	89	devices = NULL;
	90	drvc = di->priv;
	91	drvc->instances = NULL;
	92
ad9dbc1c KA	93	/* Probe for /dev/beaglelogic */
	94	if (!g_file_test(BEAGLELOGIC_DEV_NODE, G_FILE_TEST_EXISTS))
	95	return NULL;
	96
	97	sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, NULL, "BeagleLogic", "1.0");
	98	sdi->driver = di;
	99
	100	/* Unless explicitly specified, keep max channels to 8 only */
	101	maxch = 8;
	102	for (l = options; l; l = l->next) {
	103	src = l->data;
	104	if (src->key == SR_CONF_NUM_LOGIC_CHANNELS)
	105	maxch = g_variant_get_int32(src->data);
	106	}
	107
	108	/* We need to test for number of channels by opening the node */
	109	devc = beaglelogic_devc_alloc();
	110
	111	if (beaglelogic_open_nonblock(devc) != SR_OK) {
	112	g_free(devc);
	113	sr_dev_inst_free(sdi);
	114
	115	return NULL;
	116	}
	117
	118	if (maxch > 8) {
	119	maxch = NUM_CHANNELS;
	120	devc->sampleunit = BL_SAMPLEUNIT_16_BITS;
	121	} else {
	122	maxch = 8;
	123	devc->sampleunit = BL_SAMPLEUNIT_8_BITS;
	124	}
	125
	126	beaglelogic_set_sampleunit(devc);
	127	beaglelogic_close(devc);
	128
	129	/* Signal */
	130	sr_info("BeagleLogic device found at "BEAGLELOGIC_DEV_NODE);
	131
	132	/* Fill the channels */
	133	for (i = 0; i < maxch; i++) {
	134	if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
	135	beaglelogic_channel_names[i])))
	136	return NULL;
	137	sdi->channels = g_slist_append(sdi->channels, ch);
	138	}
	139
	140	sdi->priv = devc;
	141	drvc->instances = g_slist_append(drvc->instances, sdi);
	142	devices = g_slist_append(devices, sdi);
bb993797 KA	143
	144	return devices;
	145	}
	146
	147	static GSList *dev_list(void)
	148	{
	149	return ((struct drv_context *)(di->priv))->instances;
	150	}
	151
	152	static int dev_clear(void)
	153	{
	154	return std_dev_clear(di, NULL);
	155	}
	156
	157	static int dev_open(struct sr_dev_inst *sdi)
	158	{
ad9dbc1c KA	159	struct dev_context *devc = sdi->priv;
	160
	161	/* Open BeagleLogic */
	162	if (beaglelogic_open_nonblock(devc))
	163	return SR_ERR;
	164
	165	/* Set fd and local attributes */
	166	devc->pollfd.fd = devc->fd;
	167	devc->pollfd.events = G_IO_IN;
	168
	169	/* Get the default attributes */
	170	beaglelogic_get_samplerate(devc);
	171	beaglelogic_get_sampleunit(devc);
	172	beaglelogic_get_triggerflags(devc);
	173	beaglelogic_get_buffersize(devc);
	174	beaglelogic_get_bufunitsize(devc);
	175
	176	/* Map the kernel capture FIFO for reads, saves 1 level of memcpy */
	177	if (beaglelogic_mmap(devc) != SR_OK) {
	178	sr_err("Unable to map capture buffer");
	179	beaglelogic_close(devc);
	180	return SR_ERR;
	181	}
bb993797	182
ad9dbc1c	183	/* We're good to go now */
bb993797	184	sdi->status = SR_ST_ACTIVE;
bb993797 KA	185	return SR_OK;
	186	}
	187
	188	static int dev_close(struct sr_dev_inst *sdi)
	189	{
ad9dbc1c	190	struct dev_context *devc = sdi->priv;
bb993797	191
ad9dbc1c KA	192	if (sdi->status == SR_ST_ACTIVE) {
	193	/* Close the memory mapping and the file */
	194	beaglelogic_munmap(devc);
	195	beaglelogic_close(devc);
	196	}
bb993797	197	sdi->status = SR_ST_INACTIVE;
bb993797 KA	198	return SR_OK;
	199	}
	200
	201	static int cleanup(void)
	202	{
ad9dbc1c KA	203	struct drv_context *drvc;
	204	struct sr_dev_inst *sdi;
	205	GSList *l;
	206
	207	/* unused driver */
	208	if (!(drvc = di->priv))
	209	return SR_OK;
	210
	211	/* Clean up the instances */
	212	for (l = drvc->instances; l; l = l->next) {
	213	sdi = l->data;
	214	di->dev_close(sdi);
	215	g_free(sdi->priv);
	216	sr_dev_inst_free(sdi);
	217	}
	218	g_slist_free(drvc->instances);
	219	drvc->instances = NULL;
bb993797	220
ad9dbc1c	221	di->priv = NULL;
bb993797 KA	222
	223	return SR_OK;
	224	}
	225
584560f1	226	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
bb993797 KA	227	const struct sr_channel_group *cg)
bb993797 KA	228	{
ad9dbc1c	229	struct dev_context *devc = sdi->priv;
bb993797 KA	230	(void)cg;
bb993797 KA	231
bb993797	232	switch (key) {
ad9dbc1c KA	233	case SR_CONF_LIMIT_SAMPLES:
	234	*data = g_variant_new_uint64(devc->limit_samples);
	235	break;
	236
	237	case SR_CONF_SAMPLERATE:
	238	*data = g_variant_new_uint64(devc->cur_samplerate);
	239	break;
	240
	241	case SR_CONF_NUM_LOGIC_CHANNELS:
	242	*data = g_variant_new_uint32(g_slist_length(sdi->channels));
	243	break;
	244
bb993797 KA	245	default:
	246	return SR_ERR_NA;
	247	}
	248
ad9dbc1c	249	return SR_OK;
bb993797 KA	250	}
bb993797 KA	251
584560f1	252	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
bb993797 KA	253	const struct sr_channel_group *cg)
bb993797 KA	254	{
ad9dbc1c KA	255	struct dev_context *devc = sdi->priv;
ad9dbc1c KA	256	uint64_t tmp_u64;
bb993797 KA	257	(void)cg;
	258
	259	if (sdi->status != SR_ST_ACTIVE)
	260	return SR_ERR_DEV_CLOSED;
	261
bb993797	262	switch (key) {
ad9dbc1c KA	263	case SR_CONF_SAMPLERATE:
	264	devc->cur_samplerate = g_variant_get_uint64(data);
	265	return beaglelogic_set_samplerate(devc);
	266
	267	case SR_CONF_LIMIT_SAMPLES:
	268	tmp_u64 = g_variant_get_uint64(data);
	269	devc->limit_samples = tmp_u64;
	270	devc->triggerflags = BL_TRIGGERFLAGS_ONESHOT;
	271
	272	/* Check if we have sufficient buffer size */
	273	tmp_u64 *= SAMPLEUNIT_TO_BYTES(devc->sampleunit);
	274	if (tmp_u64 > devc->buffersize) {
	275	sr_warn("Insufficient buffer space has been allocated.");
	276	sr_warn("Please use \'echo <size in bytes> > "\
	277	BEAGLELOGIC_SYSFS_ATTR(memalloc) \
	278	"\' as root to increase the buffer size, this"\
	279	" capture is now truncated to %d Msamples",
	280	devc->buffersize /
	281	(SAMPLEUNIT_TO_BYTES(devc->sampleunit) * 1000000));
	282	}
	283	return beaglelogic_set_triggerflags(devc);
	284
bb993797	285	default:
ad9dbc1c	286	return SR_ERR_NA;
bb993797 KA	287	}
bb993797 KA	288
ad9dbc1c	289	return SR_OK;
bb993797 KA	290	}
bb993797 KA	291
584560f1	292	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
bb993797 KA	293	const struct sr_channel_group *cg)
	294	{
	295	int ret;
ad9dbc1c KA	296	GVariant *gvar;
ad9dbc1c KA	297	GVariantBuilder gvb;
bb993797 KA	298
	299	(void)sdi;
	300	(void)data;
	301	(void)cg;
	302
	303	ret = SR_OK;
	304	switch (key) {
ad9dbc1c	305	case SR_CONF_DEVICE_OPTIONS:
584560f1 BV	306	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	307	hwcaps, ARRAY_SIZE(hwcaps), sizeof(uint32_t));
ad9dbc1c KA	308	break;
	309	case SR_CONF_SAMPLERATE:
	310	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	311	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
	312	samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
	313	g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
	314	*data = g_variant_builder_end(&gvb);
	315	break;
	316	case SR_CONF_TRIGGER_MATCH:
584560f1	317	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
ad9dbc1c KA	318	soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
	319	sizeof(int32_t));
	320	break;
bb993797 KA	321	default:
	322	return SR_ERR_NA;
	323	}
	324
	325	return ret;
	326	}
	327
ad9dbc1c KA	328	/* get a sane timeout for poll() */
	329	#define BUFUNIT_TIMEOUT_MS(devc) (100 + ((devc->bufunitsize * 1000) / \
	330	(uint32_t)(devc->cur_samplerate)))
	331
bb993797 KA	332	static int dev_acquisition_start(const struct sr_dev_inst *sdi,
	333	void *cb_data)
	334	{
bb993797	335	(void)cb_data;
ad9dbc1c KA	336	struct dev_context *devc = sdi->priv;
ad9dbc1c KA	337	struct sr_trigger *trigger;
bb993797 KA	338
	339	if (sdi->status != SR_ST_ACTIVE)
	340	return SR_ERR_DEV_CLOSED;
	341
ad9dbc1c KA	342	/* Save user pointer */
	343	devc->cb_data = cb_data;
	344
	345	/* Clear capture state */
	346	devc->bytes_read = 0;
	347	devc->offset = 0;
	348
	349	/* Configure channels */
	350	devc->sampleunit = g_slist_length(sdi->channels) > 8 ?
	351	BL_SAMPLEUNIT_16_BITS : BL_SAMPLEUNIT_8_BITS;
	352	beaglelogic_set_sampleunit(devc);
	353
	354	/* Configure triggers & send header packet */
	355	if ((trigger = sr_session_trigger_get(sdi->session))) {
	356	devc->stl = soft_trigger_logic_new(sdi, trigger);
	357	devc->trigger_fired = FALSE;
	358	} else
	359	devc->trigger_fired = TRUE;
	360	std_session_send_df_header(cb_data, LOG_PREFIX);
	361
	362	/* Trigger and add poll on file */
	363	beaglelogic_start(devc);
	364	sr_session_source_add_pollfd(sdi->session, &devc->pollfd,
	365	BUFUNIT_TIMEOUT_MS(devc), beaglelogic_receive_data,
	366	(void *)sdi);
bb993797 KA	367
	368	return SR_OK;
	369	}
	370
	371	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	372	{
ad9dbc1c KA	373	struct dev_context *devc = sdi->priv;
	374	struct sr_datafeed_packet pkt;
	375
bb993797 KA	376	(void)cb_data;
	377
	378	if (sdi->status != SR_ST_ACTIVE)
	379	return SR_ERR_DEV_CLOSED;
	380
ad9dbc1c KA	381	/* Execute a stop on BeagleLogic */
	382	beaglelogic_stop(devc);
	383
	384	/* lseek to offset 0, flushes the cache */
	385	lseek(devc->fd, 0, SEEK_SET);
	386
	387	/* Remove session source and send EOT packet */
	388	sr_session_source_remove_pollfd(sdi->session, &devc->pollfd);
	389	pkt.type = SR_DF_END;
	390	pkt.payload = NULL;
	391	sr_session_send(sdi, &pkt);
bb993797 KA	392
	393	return SR_OK;
	394	}
	395
	396	SR_PRIV struct sr_dev_driver beaglelogic_driver_info = {
	397	.name = "beaglelogic",
	398	.longname = "BeagleLogic",
	399	.api_version = 1,
	400	.init = init,
	401	.cleanup = cleanup,
	402	.scan = scan,
	403	.dev_list = dev_list,
	404	.dev_clear = dev_clear,
	405	.config_get = config_get,
	406	.config_set = config_set,
	407	.config_list = config_list,
	408	.dev_open = dev_open,
	409	.dev_close = dev_close,
	410	.dev_acquisition_start = dev_acquisition_start,
	411	.dev_acquisition_stop = dev_acquisition_stop,
	412	.priv = NULL,
	413	};