[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;

	/* 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();
	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++) {
		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_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);
		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
ad9dbc1c KA	68	static struct dev_context * beaglelogic_devc_alloc(void)
	69	{
	70	struct dev_context *devc;
	71
	72	/* Allocate zeroed structure */
	73	devc = g_try_malloc0(sizeof(*devc));
	74
	75	/* Default non-zero values (if any) */
	76	devc->fd = -1;
	77	devc->limit_samples = (uint64_t)-1;
	78
	79	return devc;
	80	}
	81
bb993797 KA	82	static GSList scan(GSList options)
	83	{
	84	struct drv_context *drvc;
ad9dbc1c KA	85	GSList devices, l;
	86	struct sr_config *src;
	87	struct sr_dev_inst *sdi;
	88	struct dev_context *devc;
	89	struct sr_channel *ch;
	90	int i, maxch;
bb993797 KA	91
	92	devices = NULL;
	93	drvc = di->priv;
	94	drvc->instances = NULL;
	95
ad9dbc1c KA	96	/* Probe for /dev/beaglelogic */
	97	if (!g_file_test(BEAGLELOGIC_DEV_NODE, G_FILE_TEST_EXISTS))
	98	return NULL;
	99
0af636be UH	100	sdi = sr_dev_inst_new();
	101	sdi->status = SR_ST_INACTIVE;
	102	sdi->model = g_strdup("BeagleLogic");
	103	sdi->version = g_strdup("1.0");
ad9dbc1c KA	104	sdi->driver = di;
	105
	106	/* Unless explicitly specified, keep max channels to 8 only */
	107	maxch = 8;
	108	for (l = options; l; l = l->next) {
	109	src = l->data;
	110	if (src->key == SR_CONF_NUM_LOGIC_CHANNELS)
	111	maxch = g_variant_get_int32(src->data);
	112	}
	113
	114	/* We need to test for number of channels by opening the node */
	115	devc = beaglelogic_devc_alloc();
	116
	117	if (beaglelogic_open_nonblock(devc) != SR_OK) {
	118	g_free(devc);
	119	sr_dev_inst_free(sdi);
	120
	121	return NULL;
	122	}
	123
	124	if (maxch > 8) {
	125	maxch = NUM_CHANNELS;
	126	devc->sampleunit = BL_SAMPLEUNIT_16_BITS;
	127	} else {
	128	maxch = 8;
	129	devc->sampleunit = BL_SAMPLEUNIT_8_BITS;
	130	}
	131
	132	beaglelogic_set_sampleunit(devc);
	133	beaglelogic_close(devc);
	134
	135	/* Signal */
	136	sr_info("BeagleLogic device found at "BEAGLELOGIC_DEV_NODE);
	137
	138	/* Fill the channels */
	139	for (i = 0; i < maxch; i++) {
	140	if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
	141	beaglelogic_channel_names[i])))
	142	return NULL;
	143	sdi->channels = g_slist_append(sdi->channels, ch);
	144	}
	145
	146	sdi->priv = devc;
	147	drvc->instances = g_slist_append(drvc->instances, sdi);
	148	devices = g_slist_append(devices, sdi);
bb993797 KA	149
	150	return devices;
	151	}
	152
	153	static GSList *dev_list(void)
	154	{
	155	return ((struct drv_context *)(di->priv))->instances;
	156	}
	157
	158	static int dev_clear(void)
	159	{
	160	return std_dev_clear(di, NULL);
	161	}
	162
	163	static int dev_open(struct sr_dev_inst *sdi)
	164	{
ad9dbc1c KA	165	struct dev_context *devc = sdi->priv;
	166
	167	/* Open BeagleLogic */
	168	if (beaglelogic_open_nonblock(devc))
	169	return SR_ERR;
	170
	171	/* Set fd and local attributes */
	172	devc->pollfd.fd = devc->fd;
	173	devc->pollfd.events = G_IO_IN;
	174
	175	/* Get the default attributes */
	176	beaglelogic_get_samplerate(devc);
	177	beaglelogic_get_sampleunit(devc);
	178	beaglelogic_get_triggerflags(devc);
	179	beaglelogic_get_buffersize(devc);
	180	beaglelogic_get_bufunitsize(devc);
	181
	182	/* Map the kernel capture FIFO for reads, saves 1 level of memcpy */
	183	if (beaglelogic_mmap(devc) != SR_OK) {
	184	sr_err("Unable to map capture buffer");
	185	beaglelogic_close(devc);
	186	return SR_ERR;
	187	}
bb993797	188
ad9dbc1c	189	/* We're good to go now */
bb993797	190	sdi->status = SR_ST_ACTIVE;
bb993797 KA	191	return SR_OK;
	192	}
	193
	194	static int dev_close(struct sr_dev_inst *sdi)
	195	{
ad9dbc1c	196	struct dev_context *devc = sdi->priv;
bb993797	197
ad9dbc1c KA	198	if (sdi->status == SR_ST_ACTIVE) {
	199	/* Close the memory mapping and the file */
	200	beaglelogic_munmap(devc);
	201	beaglelogic_close(devc);
	202	}
bb993797	203	sdi->status = SR_ST_INACTIVE;
bb993797 KA	204	return SR_OK;
	205	}
	206
	207	static int cleanup(void)
	208	{
ad9dbc1c KA	209	struct drv_context *drvc;
	210	struct sr_dev_inst *sdi;
	211	GSList *l;
	212
	213	/* unused driver */
	214	if (!(drvc = di->priv))
	215	return SR_OK;
	216
	217	/* Clean up the instances */
	218	for (l = drvc->instances; l; l = l->next) {
	219	sdi = l->data;
	220	di->dev_close(sdi);
	221	g_free(sdi->priv);
	222	sr_dev_inst_free(sdi);
	223	}
	224	g_slist_free(drvc->instances);
	225	drvc->instances = NULL;
bb993797	226
ad9dbc1c	227	di->priv = NULL;
bb993797 KA	228
	229	return SR_OK;
	230	}
	231
584560f1	232	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
bb993797 KA	233	const struct sr_channel_group *cg)
bb993797 KA	234	{
ad9dbc1c	235	struct dev_context *devc = sdi->priv;
bb993797 KA	236	(void)cg;
bb993797 KA	237
bb993797	238	switch (key) {
ad9dbc1c KA	239	case SR_CONF_LIMIT_SAMPLES:
	240	*data = g_variant_new_uint64(devc->limit_samples);
	241	break;
	242
	243	case SR_CONF_SAMPLERATE:
	244	*data = g_variant_new_uint64(devc->cur_samplerate);
	245	break;
	246
	247	case SR_CONF_NUM_LOGIC_CHANNELS:
	248	*data = g_variant_new_uint32(g_slist_length(sdi->channels));
	249	break;
	250
bb993797 KA	251	default:
	252	return SR_ERR_NA;
	253	}
	254
ad9dbc1c	255	return SR_OK;
bb993797 KA	256	}
bb993797 KA	257
584560f1	258	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
bb993797 KA	259	const struct sr_channel_group *cg)
bb993797 KA	260	{
ad9dbc1c KA	261	struct dev_context *devc = sdi->priv;
ad9dbc1c KA	262	uint64_t tmp_u64;
bb993797 KA	263	(void)cg;
	264
	265	if (sdi->status != SR_ST_ACTIVE)
	266	return SR_ERR_DEV_CLOSED;
	267
bb993797	268	switch (key) {
ad9dbc1c KA	269	case SR_CONF_SAMPLERATE:
	270	devc->cur_samplerate = g_variant_get_uint64(data);
	271	return beaglelogic_set_samplerate(devc);
	272
	273	case SR_CONF_LIMIT_SAMPLES:
	274	tmp_u64 = g_variant_get_uint64(data);
	275	devc->limit_samples = tmp_u64;
	276	devc->triggerflags = BL_TRIGGERFLAGS_ONESHOT;
	277
	278	/* Check if we have sufficient buffer size */
	279	tmp_u64 *= SAMPLEUNIT_TO_BYTES(devc->sampleunit);
	280	if (tmp_u64 > devc->buffersize) {
	281	sr_warn("Insufficient buffer space has been allocated.");
	282	sr_warn("Please use \'echo <size in bytes> > "\
	283	BEAGLELOGIC_SYSFS_ATTR(memalloc) \
	284	"\' as root to increase the buffer size, this"\
	285	" capture is now truncated to %d Msamples",
	286	devc->buffersize /
	287	(SAMPLEUNIT_TO_BYTES(devc->sampleunit) * 1000000));
	288	}
	289	return beaglelogic_set_triggerflags(devc);
	290
bb993797	291	default:
ad9dbc1c	292	return SR_ERR_NA;
bb993797 KA	293	}
bb993797 KA	294
ad9dbc1c	295	return SR_OK;
bb993797 KA	296	}
bb993797 KA	297
584560f1	298	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
bb993797 KA	299	const struct sr_channel_group *cg)
	300	{
	301	int ret;
ad9dbc1c KA	302	GVariant *gvar;
ad9dbc1c KA	303	GVariantBuilder gvb;
bb993797 KA	304
	305	(void)sdi;
	306	(void)data;
	307	(void)cg;
	308
	309	ret = SR_OK;
	310	switch (key) {
138589b0 BV	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;
ad9dbc1c	315	case SR_CONF_DEVICE_OPTIONS:
584560f1	316	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
f254bc4b	317	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
ad9dbc1c KA	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:
af945a66	327	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
ad9dbc1c KA	328	soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
	329	sizeof(int32_t));
	330	break;
bb993797 KA	331	default:
	332	return SR_ERR_NA;
	333	}
	334
	335	return ret;
	336	}
	337
ad9dbc1c KA	338	/* get a sane timeout for poll() */
	339	#define BUFUNIT_TIMEOUT_MS(devc) (100 + ((devc->bufunitsize * 1000) / \
	340	(uint32_t)(devc->cur_samplerate)))
	341
bb993797 KA	342	static int dev_acquisition_start(const struct sr_dev_inst *sdi,
	343	void *cb_data)
	344	{
bb993797	345	(void)cb_data;
ad9dbc1c KA	346	struct dev_context *devc = sdi->priv;
ad9dbc1c KA	347	struct sr_trigger *trigger;
bb993797 KA	348
	349	if (sdi->status != SR_ST_ACTIVE)
	350	return SR_ERR_DEV_CLOSED;
	351
ad9dbc1c KA	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	devc->stl = soft_trigger_logic_new(sdi, trigger);
	367	devc->trigger_fired = FALSE;
	368	} else
	369	devc->trigger_fired = TRUE;
	370	std_session_send_df_header(cb_data, LOG_PREFIX);
	371
	372	/* Trigger and add poll on file */
	373	beaglelogic_start(devc);
	374	sr_session_source_add_pollfd(sdi->session, &devc->pollfd,
	375	BUFUNIT_TIMEOUT_MS(devc), beaglelogic_receive_data,
	376	(void *)sdi);
bb993797 KA	377
	378	return SR_OK;
	379	}
	380
	381	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	382	{
ad9dbc1c KA	383	struct dev_context *devc = sdi->priv;
	384	struct sr_datafeed_packet pkt;
	385
bb993797 KA	386	(void)cb_data;
	387
	388	if (sdi->status != SR_ST_ACTIVE)
	389	return SR_ERR_DEV_CLOSED;
	390
ad9dbc1c KA	391	/* Execute a stop on BeagleLogic */
	392	beaglelogic_stop(devc);
	393
	394	/* lseek to offset 0, flushes the cache */
	395	lseek(devc->fd, 0, SEEK_SET);
	396
	397	/* Remove session source and send EOT packet */
	398	sr_session_source_remove_pollfd(sdi->session, &devc->pollfd);
	399	pkt.type = SR_DF_END;
	400	pkt.payload = NULL;
	401	sr_session_send(sdi, &pkt);
bb993797 KA	402
	403	return SR_OK;
	404	}
	405
	406	SR_PRIV struct sr_dev_driver beaglelogic_driver_info = {
	407	.name = "beaglelogic",
	408	.longname = "BeagleLogic",
	409	.api_version = 1,
	410	.init = init,
	411	.cleanup = cleanup,
	412	.scan = scan,
	413	.dev_list = dev_list,
	414	.dev_clear = dev_clear,
	415	.config_get = config_get,
	416	.config_set = config_set,
	417	.config_list = config_list,
	418	.dev_open = dev_open,
	419	.dev_close = dev_close,
	420	.dev_acquisition_start = dev_acquisition_start,
	421	.dev_acquisition_stop = dev_acquisition_stop,
	422	.priv = NULL,
	423	};