[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;

/* 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_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,
};

/* 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;

	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(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 = g_malloc0(sizeof(struct sr_dev_inst));
	sdi->status = SR_ST_INACTIVE;
	sdi->model = g_strdup("BeagleLogic");
	sdi->version = g_strdup("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++) {
		ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
				beaglelogic_channel_names[i]);
		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_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,
				    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, 0);
		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
138589b0 BV	26	/* Scan options */
	27	static const uint32_t scanopts[] = {
	28	SR_CONF_NUM_LOGIC_CHANNELS,
	29	};
	30
	31	/* Hardware capabilities */
f254bc4b	32	static const uint32_t devopts[] = {
ad9dbc1c	33	SR_CONF_LOGIC_ANALYZER,
ad9dbc1c	34	SR_CONF_CONTINUOUS,
5827f61b BV	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_NUM_LOGIC_CHANNELS \| SR_CONF_GET,
ad9dbc1c KA	39	};
	40
	41	/* Trigger matching capabilities */
	42	static const int32_t soft_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	/* Channels are numbered 0-13 */
	51	SR_PRIV const char *beaglelogic_channel_names[NUM_CHANNELS + 1] = {
	52	"P8_45", "P8_46", "P8_43", "P8_44", "P8_41", "P8_42", "P8_39", "P8_40",
	53	"P8_27", "P8_29", "P8_28", "P8_30", "P8_21", "P8_20", NULL,
	54	};
	55
	56	/* Possible sample rates : 10 Hz to 100 MHz = (100 / x) MHz */
	57	static const uint64_t samplerates[] = {
138589b0 BV	58	SR_HZ(10),
	59	SR_MHZ(100),
	60	SR_HZ(1),
ad9dbc1c KA	61	};
ad9dbc1c KA	62
bb993797 KA	63	static int init(struct sr_context *sr_ctx)
	64	{
	65	return std_init(sr_ctx, di, LOG_PREFIX);
	66	}
	67
f57d8ffe	68	static struct dev_context *beaglelogic_devc_alloc(void)
ad9dbc1c KA	69	{
	70	struct dev_context *devc;
	71
f57d8ffe	72	devc = g_malloc0(sizeof(struct dev_context));
ad9dbc1c KA	73
	74	/* Default non-zero values (if any) */
	75	devc->fd = -1;
	76	devc->limit_samples = (uint64_t)-1;
	77
	78	return devc;
	79	}
	80
bb993797 KA	81	static GSList scan(GSList options)
	82	{
	83	struct drv_context *drvc;
ad9dbc1c KA	84	GSList devices, l;
	85	struct sr_config *src;
	86	struct sr_dev_inst *sdi;
	87	struct dev_context *devc;
	88	struct sr_channel *ch;
	89	int i, maxch;
bb993797 KA	90
	91	devices = NULL;
	92	drvc = di->priv;
	93	drvc->instances = NULL;
	94
ad9dbc1c KA	95	/* Probe for /dev/beaglelogic */
	96	if (!g_file_test(BEAGLELOGIC_DEV_NODE, G_FILE_TEST_EXISTS))
	97	return NULL;
	98
aac29cc1	99	sdi = g_malloc0(sizeof(struct sr_dev_inst));
0af636be UH	100	sdi->status = SR_ST_INACTIVE;
	101	sdi->model = g_strdup("BeagleLogic");
	102	sdi->version = g_strdup("1.0");
ad9dbc1c KA	103	sdi->driver = di;
	104
	105	/* Unless explicitly specified, keep max channels to 8 only */
	106	maxch = 8;
	107	for (l = options; l; l = l->next) {
	108	src = l->data;
	109	if (src->key == SR_CONF_NUM_LOGIC_CHANNELS)
	110	maxch = g_variant_get_int32(src->data);
	111	}
	112
	113	/* We need to test for number of channels by opening the node */
	114	devc = beaglelogic_devc_alloc();
	115
	116	if (beaglelogic_open_nonblock(devc) != SR_OK) {
	117	g_free(devc);
	118	sr_dev_inst_free(sdi);
	119
	120	return NULL;
	121	}
	122
	123	if (maxch > 8) {
	124	maxch = NUM_CHANNELS;
	125	devc->sampleunit = BL_SAMPLEUNIT_16_BITS;
	126	} else {
	127	maxch = 8;
	128	devc->sampleunit = BL_SAMPLEUNIT_8_BITS;
	129	}
	130
	131	beaglelogic_set_sampleunit(devc);
	132	beaglelogic_close(devc);
	133
	134	/* Signal */
	135	sr_info("BeagleLogic device found at "BEAGLELOGIC_DEV_NODE);
	136
	137	/* Fill the channels */
	138	for (i = 0; i < maxch; i++) {
c368e6f3 UH	139	ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
c368e6f3 UH	140	beaglelogic_channel_names[i]);
ad9dbc1c KA	141	sdi->channels = g_slist_append(sdi->channels, ch);
	142	}
	143
	144	sdi->priv = devc;
	145	drvc->instances = g_slist_append(drvc->instances, sdi);
	146	devices = g_slist_append(devices, sdi);
bb993797 KA	147
	148	return devices;
	149	}
	150
	151	static GSList *dev_list(void)
	152	{
	153	return ((struct drv_context *)(di->priv))->instances;
	154	}
	155
	156	static int dev_clear(void)
	157	{
	158	return std_dev_clear(di, NULL);
	159	}
	160
	161	static int dev_open(struct sr_dev_inst *sdi)
	162	{
ad9dbc1c KA	163	struct dev_context *devc = sdi->priv;
	164
	165	/* Open BeagleLogic */
	166	if (beaglelogic_open_nonblock(devc))
	167	return SR_ERR;
	168
	169	/* Set fd and local attributes */
	170	devc->pollfd.fd = devc->fd;
	171	devc->pollfd.events = G_IO_IN;
	172
	173	/* Get the default attributes */
	174	beaglelogic_get_samplerate(devc);
	175	beaglelogic_get_sampleunit(devc);
	176	beaglelogic_get_triggerflags(devc);
	177	beaglelogic_get_buffersize(devc);
	178	beaglelogic_get_bufunitsize(devc);
	179
	180	/* Map the kernel capture FIFO for reads, saves 1 level of memcpy */
	181	if (beaglelogic_mmap(devc) != SR_OK) {
	182	sr_err("Unable to map capture buffer");
	183	beaglelogic_close(devc);
	184	return SR_ERR;
	185	}
bb993797	186
ad9dbc1c	187	/* We're good to go now */
bb993797	188	sdi->status = SR_ST_ACTIVE;
bb993797 KA	189	return SR_OK;
	190	}
	191
	192	static int dev_close(struct sr_dev_inst *sdi)
	193	{
ad9dbc1c	194	struct dev_context *devc = sdi->priv;
bb993797	195
ad9dbc1c KA	196	if (sdi->status == SR_ST_ACTIVE) {
	197	/* Close the memory mapping and the file */
	198	beaglelogic_munmap(devc);
	199	beaglelogic_close(devc);
	200	}
bb993797	201	sdi->status = SR_ST_INACTIVE;
bb993797 KA	202	return SR_OK;
	203	}
	204
	205	static int cleanup(void)
	206	{
ad9dbc1c KA	207	struct drv_context *drvc;
	208	struct sr_dev_inst *sdi;
	209	GSList *l;
	210
	211	/* unused driver */
	212	if (!(drvc = di->priv))
	213	return SR_OK;
	214
	215	/* Clean up the instances */
	216	for (l = drvc->instances; l; l = l->next) {
	217	sdi = l->data;
	218	di->dev_close(sdi);
	219	g_free(sdi->priv);
	220	sr_dev_inst_free(sdi);
	221	}
	222	g_slist_free(drvc->instances);
	223	drvc->instances = NULL;
bb993797	224
ad9dbc1c	225	di->priv = NULL;
bb993797 KA	226
	227	return SR_OK;
	228	}
	229
584560f1	230	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
bb993797 KA	231	const struct sr_channel_group *cg)
bb993797 KA	232	{
ad9dbc1c	233	struct dev_context *devc = sdi->priv;
bb993797 KA	234	(void)cg;
bb993797 KA	235
bb993797	236	switch (key) {
ad9dbc1c KA	237	case SR_CONF_LIMIT_SAMPLES:
	238	*data = g_variant_new_uint64(devc->limit_samples);
	239	break;
	240
	241	case SR_CONF_SAMPLERATE:
	242	*data = g_variant_new_uint64(devc->cur_samplerate);
	243	break;
	244
	245	case SR_CONF_NUM_LOGIC_CHANNELS:
	246	*data = g_variant_new_uint32(g_slist_length(sdi->channels));
	247	break;
	248
bb993797 KA	249	default:
	250	return SR_ERR_NA;
	251	}
	252
ad9dbc1c	253	return SR_OK;
bb993797 KA	254	}
bb993797 KA	255
584560f1	256	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
bb993797 KA	257	const struct sr_channel_group *cg)
bb993797 KA	258	{
ad9dbc1c KA	259	struct dev_context *devc = sdi->priv;
ad9dbc1c KA	260	uint64_t tmp_u64;
bb993797 KA	261	(void)cg;
	262
	263	if (sdi->status != SR_ST_ACTIVE)
	264	return SR_ERR_DEV_CLOSED;
	265
bb993797	266	switch (key) {
ad9dbc1c KA	267	case SR_CONF_SAMPLERATE:
	268	devc->cur_samplerate = g_variant_get_uint64(data);
	269	return beaglelogic_set_samplerate(devc);
	270
	271	case SR_CONF_LIMIT_SAMPLES:
	272	tmp_u64 = g_variant_get_uint64(data);
	273	devc->limit_samples = tmp_u64;
	274	devc->triggerflags = BL_TRIGGERFLAGS_ONESHOT;
	275
	276	/* Check if we have sufficient buffer size */
	277	tmp_u64 *= SAMPLEUNIT_TO_BYTES(devc->sampleunit);
	278	if (tmp_u64 > devc->buffersize) {
	279	sr_warn("Insufficient buffer space has been allocated.");
	280	sr_warn("Please use \'echo <size in bytes> > "\
	281	BEAGLELOGIC_SYSFS_ATTR(memalloc) \
	282	"\' as root to increase the buffer size, this"\
	283	" capture is now truncated to %d Msamples",
	284	devc->buffersize /
	285	(SAMPLEUNIT_TO_BYTES(devc->sampleunit) * 1000000));
	286	}
	287	return beaglelogic_set_triggerflags(devc);
	288
bb993797	289	default:
ad9dbc1c	290	return SR_ERR_NA;
bb993797 KA	291	}
bb993797 KA	292
ad9dbc1c	293	return SR_OK;
bb993797 KA	294	}
bb993797 KA	295
584560f1	296	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
bb993797 KA	297	const struct sr_channel_group *cg)
	298	{
	299	int ret;
ad9dbc1c KA	300	GVariant *gvar;
ad9dbc1c KA	301	GVariantBuilder gvb;
bb993797 KA	302
	303	(void)sdi;
	304	(void)data;
	305	(void)cg;
	306
	307	ret = SR_OK;
	308	switch (key) {
138589b0 BV	309	case SR_CONF_SCAN_OPTIONS:
	310	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	311	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
	312	break;
ad9dbc1c	313	case SR_CONF_DEVICE_OPTIONS:
584560f1	314	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
f254bc4b	315	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
ad9dbc1c KA	316	break;
	317	case SR_CONF_SAMPLERATE:
	318	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	319	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
	320	samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
	321	g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
	322	*data = g_variant_builder_end(&gvb);
	323	break;
	324	case SR_CONF_TRIGGER_MATCH:
af945a66	325	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
ad9dbc1c KA	326	soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
	327	sizeof(int32_t));
	328	break;
bb993797 KA	329	default:
	330	return SR_ERR_NA;
	331	}
	332
	333	return ret;
	334	}
	335
ad9dbc1c KA	336	/* get a sane timeout for poll() */
	337	#define BUFUNIT_TIMEOUT_MS(devc) (100 + ((devc->bufunitsize * 1000) / \
	338	(uint32_t)(devc->cur_samplerate)))
	339
bb993797 KA	340	static int dev_acquisition_start(const struct sr_dev_inst *sdi,
	341	void *cb_data)
	342	{
bb993797	343	(void)cb_data;
ad9dbc1c KA	344	struct dev_context *devc = sdi->priv;
ad9dbc1c KA	345	struct sr_trigger *trigger;
bb993797 KA	346
	347	if (sdi->status != SR_ST_ACTIVE)
	348	return SR_ERR_DEV_CLOSED;
	349
ad9dbc1c KA	350	/* Save user pointer */
	351	devc->cb_data = cb_data;
	352
	353	/* Clear capture state */
	354	devc->bytes_read = 0;
	355	devc->offset = 0;
	356
	357	/* Configure channels */
	358	devc->sampleunit = g_slist_length(sdi->channels) > 8 ?
	359	BL_SAMPLEUNIT_16_BITS : BL_SAMPLEUNIT_8_BITS;
	360	beaglelogic_set_sampleunit(devc);
	361
	362	/* Configure triggers & send header packet */
	363	if ((trigger = sr_session_trigger_get(sdi->session))) {
fe5a7355	364	devc->stl = soft_trigger_logic_new(sdi, trigger, 0);
ad9dbc1c KA	365	devc->trigger_fired = FALSE;
	366	} else
	367	devc->trigger_fired = TRUE;
	368	std_session_send_df_header(cb_data, LOG_PREFIX);
	369
	370	/* Trigger and add poll on file */
	371	beaglelogic_start(devc);
	372	sr_session_source_add_pollfd(sdi->session, &devc->pollfd,
	373	BUFUNIT_TIMEOUT_MS(devc), beaglelogic_receive_data,
	374	(void *)sdi);
bb993797 KA	375
	376	return SR_OK;
	377	}
	378
	379	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	380	{
ad9dbc1c KA	381	struct dev_context *devc = sdi->priv;
	382	struct sr_datafeed_packet pkt;
	383
bb993797 KA	384	(void)cb_data;
	385
	386	if (sdi->status != SR_ST_ACTIVE)
	387	return SR_ERR_DEV_CLOSED;
	388
ad9dbc1c KA	389	/* Execute a stop on BeagleLogic */
	390	beaglelogic_stop(devc);
	391
	392	/* lseek to offset 0, flushes the cache */
	393	lseek(devc->fd, 0, SEEK_SET);
	394
	395	/* Remove session source and send EOT packet */
	396	sr_session_source_remove_pollfd(sdi->session, &devc->pollfd);
	397	pkt.type = SR_DF_END;
	398	pkt.payload = NULL;
	399	sr_session_send(sdi, &pkt);
bb993797 KA	400
	401	return SR_OK;
	402	}
	403
	404	SR_PRIV struct sr_dev_driver beaglelogic_driver_info = {
	405	.name = "beaglelogic",
	406	.longname = "BeagleLogic",
	407	.api_version = 1,
	408	.init = init,
	409	.cleanup = cleanup,
	410	.scan = scan,
	411	.dev_list = dev_list,
	412	.dev_clear = dev_clear,
	413	.config_get = config_get,
	414	.config_set = config_set,
	415	.config_list = config_list,
	416	.dev_open = dev_open,
	417	.dev_close = dev_close,
	418	.dev_acquisition_start = dev_acquisition_start,
	419	.dev_acquisition_stop = dev_acquisition_stop,
	420	.priv = NULL,
	421	};