[libsigrok.git] / 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"

SR_PRIV struct sr_dev_driver 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_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 int init(struct sr_dev_driver *di, 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(struct sr_dev_driver *di, GSList *options)
{
	struct drv_context *drvc;
	GSList *devices, *l;
	struct sr_config *src;
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	int i, maxch;

	devices = NULL;
	drvc = di->context;
	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++)
		sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
				channel_names[i]);

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

	return devices;
}

static GSList *dev_list(const struct sr_dev_driver *di)
{
	return ((struct drv_context *)(di->context))->instances;
}

static int dev_clear(const struct sr_dev_driver *di)
{
	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;
	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;

	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(const struct sr_dev_driver *di)
{
	struct drv_context *drvc;
	struct sr_dev_inst *sdi;
	GSList *l;

	/* unused driver */
	if (!(drvc = di->context))
		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;

	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;

	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);
	case SR_CONF_CAPTURE_RATIO:
		devc->capture_ratio = g_variant_get_uint64(data);
		if (devc->capture_ratio > 100) {
			devc->capture_ratio = 0;
			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,
				    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))) {
		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(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,
	.context = NULL,
};
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	SR_PRIV struct sr_dev_driver beaglelogic_driver_info;
	25
	26	/* Scan options */
	27	static const uint32_t scanopts[] = {
	28	SR_CONF_NUM_LOGIC_CHANNELS,
	29	};
	30
	31	/* Hardware capabilities */
	32	static const uint32_t devopts[] = {
	33	SR_CONF_LOGIC_ANALYZER,
	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	/* Trigger matching capabilities */
	43	static const int32_t soft_trigger_matches[] = {
	44	SR_TRIGGER_ZERO,
	45	SR_TRIGGER_ONE,
	46	SR_TRIGGER_RISING,
	47	SR_TRIGGER_FALLING,
	48	SR_TRIGGER_EDGE,
	49	};
	50
	51	SR_PRIV const char *channel_names[] = {
	52	"P8_45", "P8_46", "P8_43", "P8_44", "P8_41", "P8_42", "P8_39",
	53	"P8_40", "P8_27", "P8_29", "P8_28", "P8_30", "P8_21", "P8_20",
	54	};
	55
	56	/* Possible sample rates : 10 Hz to 100 MHz = (100 / x) MHz */
	57	static const uint64_t samplerates[] = {
	58	SR_HZ(10),
	59	SR_MHZ(100),
	60	SR_HZ(1),
	61	};
	62
	63	static int init(struct sr_dev_driver di, struct sr_context sr_ctx)
	64	{
	65	return std_init(sr_ctx, di, LOG_PREFIX);
	66	}
	67
	68	static struct dev_context *beaglelogic_devc_alloc(void)
	69	{
	70	struct dev_context *devc;
	71
	72	devc = g_malloc0(sizeof(struct dev_context));
	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
	81	static GSList scan(struct sr_dev_driver di, GSList *options)
	82	{
	83	struct drv_context *drvc;
	84	GSList devices, l;
	85	struct sr_config *src;
	86	struct sr_dev_inst *sdi;
	87	struct dev_context *devc;
	88	int i, maxch;
	89
	90	devices = NULL;
	91	drvc = di->context;
	92	drvc->instances = NULL;
	93
	94	/* Probe for /dev/beaglelogic */
	95	if (!g_file_test(BEAGLELOGIC_DEV_NODE, G_FILE_TEST_EXISTS))
	96	return NULL;
	97
	98	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	99	sdi->status = SR_ST_INACTIVE;
	100	sdi->model = g_strdup("BeagleLogic");
	101	sdi->version = g_strdup("1.0");
	102	sdi->driver = di;
	103
	104	/* Unless explicitly specified, keep max channels to 8 only */
	105	maxch = 8;
	106	for (l = options; l; l = l->next) {
	107	src = l->data;
	108	if (src->key == SR_CONF_NUM_LOGIC_CHANNELS)
	109	maxch = g_variant_get_int32(src->data);
	110	}
	111
	112	/* We need to test for number of channels by opening the node */
	113	devc = beaglelogic_devc_alloc();
	114
	115	if (beaglelogic_open_nonblock(devc) != SR_OK) {
	116	g_free(devc);
	117	sr_dev_inst_free(sdi);
	118
	119	return NULL;
	120	}
	121
	122	if (maxch > 8) {
	123	maxch = NUM_CHANNELS;
	124	devc->sampleunit = BL_SAMPLEUNIT_16_BITS;
	125	} else {
	126	maxch = 8;
	127	devc->sampleunit = BL_SAMPLEUNIT_8_BITS;
	128	}
	129
	130	beaglelogic_set_sampleunit(devc);
	131	beaglelogic_close(devc);
	132
	133	/* Signal */
	134	sr_info("BeagleLogic device found at "BEAGLELOGIC_DEV_NODE);
	135
	136	/* Fill the channels */
	137	for (i = 0; i < maxch; i++)
	138	sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
	139	channel_names[i]);
	140
	141	sdi->priv = devc;
	142	drvc->instances = g_slist_append(drvc->instances, sdi);
	143	devices = g_slist_append(devices, sdi);
	144
	145	return devices;
	146	}
	147
	148	static GSList dev_list(const struct sr_dev_driver di)
	149	{
	150	return ((struct drv_context *)(di->context))->instances;
	151	}
	152
	153	static int dev_clear(const struct sr_dev_driver *di)
	154	{
	155	return std_dev_clear(di, NULL);
	156	}
	157
	158	static int dev_open(struct sr_dev_inst *sdi)
	159	{
	160	struct dev_context *devc = sdi->priv;
	161
	162	/* Open BeagleLogic */
	163	if (beaglelogic_open_nonblock(devc))
	164	return SR_ERR;
	165
	166	/* Set fd and local attributes */
	167	devc->pollfd.fd = devc->fd;
	168	devc->pollfd.events = G_IO_IN;
	169	devc->pollfd.revents = 0;
	170
	171	/* Get the default attributes */
	172	beaglelogic_get_samplerate(devc);
	173	beaglelogic_get_sampleunit(devc);
	174	beaglelogic_get_triggerflags(devc);
	175	beaglelogic_get_buffersize(devc);
	176	beaglelogic_get_bufunitsize(devc);
	177
	178	/* Map the kernel capture FIFO for reads, saves 1 level of memcpy */
	179	if (beaglelogic_mmap(devc) != SR_OK) {
	180	sr_err("Unable to map capture buffer");
	181	beaglelogic_close(devc);
	182	return SR_ERR;
	183	}
	184
	185	/* We're good to go now */
	186	sdi->status = SR_ST_ACTIVE;
	187	return SR_OK;
	188	}
	189
	190	static int dev_close(struct sr_dev_inst *sdi)
	191	{
	192	struct dev_context *devc = sdi->priv;
	193
	194	if (sdi->status == SR_ST_ACTIVE) {
	195	/* Close the memory mapping and the file */
	196	beaglelogic_munmap(devc);
	197	beaglelogic_close(devc);
	198	}
	199	sdi->status = SR_ST_INACTIVE;
	200	return SR_OK;
	201	}
	202
	203	static int cleanup(const struct sr_dev_driver *di)
	204	{
	205	struct drv_context *drvc;
	206	struct sr_dev_inst *sdi;
	207	GSList *l;
	208
	209	/* unused driver */
	210	if (!(drvc = di->context))
	211	return SR_OK;
	212
	213	/* Clean up the instances */
	214	for (l = drvc->instances; l; l = l->next) {
	215	sdi = l->data;
	216	di->dev_close(sdi);
	217	g_free(sdi->priv);
	218	sr_dev_inst_free(sdi);
	219	}
	220	g_slist_free(drvc->instances);
	221	drvc->instances = NULL;
	222
	223	return SR_OK;
	224	}
	225
	226	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	227	const struct sr_channel_group *cg)
	228	{
	229	struct dev_context *devc = sdi->priv;
	230
	231	(void)cg;
	232
	233	switch (key) {
	234	case SR_CONF_LIMIT_SAMPLES:
	235	*data = g_variant_new_uint64(devc->limit_samples);
	236	break;
	237	case SR_CONF_SAMPLERATE:
	238	*data = g_variant_new_uint64(devc->cur_samplerate);
	239	break;
	240	case SR_CONF_CAPTURE_RATIO:
	241	*data = g_variant_new_uint64(devc->capture_ratio);
	242	break;
	243	case SR_CONF_NUM_LOGIC_CHANNELS:
	244	*data = g_variant_new_uint32(g_slist_length(sdi->channels));
	245	break;
	246	default:
	247	return SR_ERR_NA;
	248	}
	249
	250	return SR_OK;
	251	}
	252
	253	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
	254	const struct sr_channel_group *cg)
	255	{
	256	struct dev_context *devc = sdi->priv;
	257	uint64_t tmp_u64;
	258
	259	(void)cg;
	260
	261	if (sdi->status != SR_ST_ACTIVE)
	262	return SR_ERR_DEV_CLOSED;
	263
	264	switch (key) {
	265	case SR_CONF_SAMPLERATE:
	266	devc->cur_samplerate = g_variant_get_uint64(data);
	267	return beaglelogic_set_samplerate(devc);
	268	case SR_CONF_LIMIT_SAMPLES:
	269	tmp_u64 = g_variant_get_uint64(data);
	270	devc->limit_samples = tmp_u64;
	271	devc->triggerflags = BL_TRIGGERFLAGS_ONESHOT;
	272
	273	/* Check if we have sufficient buffer size */
	274	tmp_u64 *= SAMPLEUNIT_TO_BYTES(devc->sampleunit);
	275	if (tmp_u64 > devc->buffersize) {
	276	sr_warn("Insufficient buffer space has been allocated.");
	277	sr_warn("Please use \'echo <size in bytes> > "\
	278	BEAGLELOGIC_SYSFS_ATTR(memalloc) \
	279	"\' as root to increase the buffer size, this"\
	280	" capture is now truncated to %d Msamples",
	281	devc->buffersize /
	282	(SAMPLEUNIT_TO_BYTES(devc->sampleunit) * 1000000));
	283	}
	284	return beaglelogic_set_triggerflags(devc);
	285	case SR_CONF_CAPTURE_RATIO:
	286	devc->capture_ratio = g_variant_get_uint64(data);
	287	if (devc->capture_ratio > 100) {
	288	devc->capture_ratio = 0;
	289	return SR_ERR;
	290	}
	291	return SR_OK;
	292	default:
	293	return SR_ERR_NA;
	294	}
	295
	296	return SR_OK;
	297	}
	298
	299	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	300	const struct sr_channel_group *cg)
	301	{
	302	int ret;
	303	GVariant *gvar;
	304	GVariantBuilder gvb;
	305
	306	(void)sdi;
	307	(void)cg;
	308
	309	ret = SR_OK;
	310	switch (key) {
	311	case SR_CONF_SCAN_OPTIONS:
	312	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	313	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
	314	break;
	315	case SR_CONF_DEVICE_OPTIONS:
	316	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	317	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
	318	break;
	319	case SR_CONF_SAMPLERATE:
	320	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	321	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
	322	samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
	323	g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
	324	*data = g_variant_builder_end(&gvb);
	325	break;
	326	case SR_CONF_TRIGGER_MATCH:
	327	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	328	soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
	329	sizeof(int32_t));
	330	break;
	331	default:
	332	return SR_ERR_NA;
	333	}
	334
	335	return ret;
	336	}
	337
	338	/* get a sane timeout for poll() */
	339	#define BUFUNIT_TIMEOUT_MS(devc) (100 + ((devc->bufunitsize * 1000) / \
	340	(uint32_t)(devc->cur_samplerate)))
	341
	342	static int dev_acquisition_start(const struct sr_dev_inst *sdi,
	343	void *cb_data)
	344	{
	345	(void)cb_data;
	346	struct dev_context *devc = sdi->priv;
	347	struct sr_trigger *trigger;
	348
	349	if (sdi->status != SR_ST_ACTIVE)
	350	return SR_ERR_DEV_CLOSED;
	351
	352	/* Save user pointer */
	353	devc->cb_data = cb_data;
	354
	355	/* Clear capture state */
	356	devc->bytes_read = 0;
	357	devc->offset = 0;
	358
	359	/* Configure channels */
	360	devc->sampleunit = g_slist_length(sdi->channels) > 8 ?
	361	BL_SAMPLEUNIT_16_BITS : BL_SAMPLEUNIT_8_BITS;
	362	beaglelogic_set_sampleunit(devc);
	363
	364	/* Configure triggers & send header packet */
	365	if ((trigger = sr_session_trigger_get(sdi->session))) {
	366	int pre_trigger_samples = 0;
	367	if (devc->limit_samples > 0)
	368	pre_trigger_samples = devc->capture_ratio * devc->limit_samples/100;
	369	devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
	370	if (!devc->stl)
	371	return SR_ERR_MALLOC;
	372	devc->trigger_fired = FALSE;
	373	} else
	374	devc->trigger_fired = TRUE;
	375	std_session_send_df_header(cb_data, LOG_PREFIX);
	376
	377	/* Trigger and add poll on file */
	378	beaglelogic_start(devc);
	379	sr_session_source_add_pollfd(sdi->session, &devc->pollfd,
	380	BUFUNIT_TIMEOUT_MS(devc), beaglelogic_receive_data,
	381	(void *)sdi);
	382
	383	return SR_OK;
	384	}
	385
	386	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	387	{
	388	struct dev_context *devc = sdi->priv;
	389	struct sr_datafeed_packet pkt;
	390
	391	(void)cb_data;
	392
	393	if (sdi->status != SR_ST_ACTIVE)
	394	return SR_ERR_DEV_CLOSED;
	395
	396	/* Execute a stop on BeagleLogic */
	397	beaglelogic_stop(devc);
	398
	399	/* lseek to offset 0, flushes the cache */
	400	lseek(devc->fd, 0, SEEK_SET);
	401
	402	/* Remove session source and send EOT packet */
	403	sr_session_source_remove_pollfd(sdi->session, &devc->pollfd);
	404	pkt.type = SR_DF_END;
	405	pkt.payload = NULL;
	406	sr_session_send(sdi, &pkt);
	407
	408	return SR_OK;
	409	}
	410
	411	SR_PRIV struct sr_dev_driver beaglelogic_driver_info = {
	412	.name = "beaglelogic",
	413	.longname = "BeagleLogic",
	414	.api_version = 1,
	415	.init = init,
	416	.cleanup = cleanup,
	417	.scan = scan,
	418	.dev_list = dev_list,
	419	.dev_clear = dev_clear,
	420	.config_get = config_get,
	421	.config_set = config_set,
	422	.config_list = config_list,
	423	.dev_open = dev_open,
	424	.dev_close = dev_close,
	425	.dev_acquisition_start = dev_acquisition_start,
	426	.dev_acquisition_stop = dev_acquisition_stop,
	427	.context = NULL,
	428	};