[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"

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 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)
			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)
{
	struct dev_context *devc = sdi->priv;
	struct sr_trigger *trigger;

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

	/* 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(sdi, 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)
{
	struct dev_context *devc = sdi->priv;

	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);
	std_session_send_df_end(sdi, LOG_PREFIX);

	return SR_OK;
}

SR_PRIV struct sr_dev_driver beaglelogic_driver_info = {
	.name = "beaglelogic",
	.longname = "BeagleLogic",
	.api_version = 1,
	.init = init,
	.cleanup = std_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
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 KA	23
bb993797 KA	24	SR_PRIV struct sr_dev_driver beaglelogic_driver_info;
bb993797	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,
e743a47d	38	SR_CONF_CAPTURE_RATIO \| SR_CONF_GET \| SR_CONF_SET,
5827f61b	39	SR_CONF_NUM_LOGIC_CHANNELS \| SR_CONF_GET,
ad9dbc1c KA	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
0f34cb47 UH	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",
ad9dbc1c KA	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
4f840ce9	63	static int init(struct sr_dev_driver di, struct sr_context sr_ctx)
bb993797 KA	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
4f840ce9	81	static GSList scan(struct sr_dev_driver di, GSList *options)
bb993797 KA	82	{
bb993797 KA	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;
ad9dbc1c	88	int i, maxch;
bb993797 KA	89
bb993797 KA	90	devices = NULL;
41812aca	91	drvc = di->context;
bb993797 KA	92	drvc->instances = NULL;
bb993797 KA	93
ad9dbc1c KA	94	/* Probe for /dev/beaglelogic */
	95	if (!g_file_test(BEAGLELOGIC_DEV_NODE, G_FILE_TEST_EXISTS))
	96	return NULL;
	97
aac29cc1	98	sdi = g_malloc0(sizeof(struct sr_dev_inst));
0af636be UH	99	sdi->status = SR_ST_INACTIVE;
	100	sdi->model = g_strdup("BeagleLogic");
	101	sdi->version = g_strdup("1.0");
ad9dbc1c KA	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 */
5e23fcab ML	137	for (i = 0; i < maxch; i++)
5e23fcab ML	138	sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
0f34cb47	139	channel_names[i]);
ad9dbc1c KA	140
	141	sdi->priv = devc;
	142	drvc->instances = g_slist_append(drvc->instances, sdi);
	143	devices = g_slist_append(devices, sdi);
bb993797 KA	144
	145	return devices;
	146	}
	147
4f840ce9	148	static GSList dev_list(const struct sr_dev_driver di)
bb993797	149	{
41812aca	150	return ((struct drv_context *)(di->context))->instances;
bb993797 KA	151	}
bb993797 KA	152
4f840ce9	153	static int dev_clear(const struct sr_dev_driver *di)
bb993797 KA	154	{
	155	return std_dev_clear(di, NULL);
	156	}
	157
	158	static int dev_open(struct sr_dev_inst *sdi)
	159	{
ad9dbc1c KA	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;
89efe064	169	devc->pollfd.revents = 0;
ad9dbc1c KA	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	}
bb993797	184
ad9dbc1c	185	/* We're good to go now */
bb993797	186	sdi->status = SR_ST_ACTIVE;
bb993797 KA	187	return SR_OK;
	188	}
	189
	190	static int dev_close(struct sr_dev_inst *sdi)
	191	{
ad9dbc1c	192	struct dev_context *devc = sdi->priv;
bb993797	193
ad9dbc1c KA	194	if (sdi->status == SR_ST_ACTIVE) {
	195	/* Close the memory mapping and the file */
	196	beaglelogic_munmap(devc);
	197	beaglelogic_close(devc);
	198	}
bb993797	199	sdi->status = SR_ST_INACTIVE;
bb993797 KA	200	return SR_OK;
	201	}
	202
584560f1	203	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
bb993797 KA	204	const struct sr_channel_group *cg)
bb993797 KA	205	{
ad9dbc1c	206	struct dev_context *devc = sdi->priv;
dcd438ee	207
bb993797 KA	208	(void)cg;
bb993797 KA	209
bb993797	210	switch (key) {
ad9dbc1c KA	211	case SR_CONF_LIMIT_SAMPLES:
	212	*data = g_variant_new_uint64(devc->limit_samples);
	213	break;
ad9dbc1c KA	214	case SR_CONF_SAMPLERATE:
	215	*data = g_variant_new_uint64(devc->cur_samplerate);
	216	break;
e743a47d AJ	217	case SR_CONF_CAPTURE_RATIO:
	218	*data = g_variant_new_uint64(devc->capture_ratio);
	219	break;
ad9dbc1c KA	220	case SR_CONF_NUM_LOGIC_CHANNELS:
	221	*data = g_variant_new_uint32(g_slist_length(sdi->channels));
	222	break;
bb993797 KA	223	default:
	224	return SR_ERR_NA;
	225	}
	226
ad9dbc1c	227	return SR_OK;
bb993797 KA	228	}
bb993797 KA	229
584560f1	230	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
bb993797 KA	231	const struct sr_channel_group *cg)
bb993797 KA	232	{
ad9dbc1c KA	233	struct dev_context *devc = sdi->priv;
ad9dbc1c KA	234	uint64_t tmp_u64;
dcd438ee	235
bb993797 KA	236	(void)cg;
	237
	238	if (sdi->status != SR_ST_ACTIVE)
	239	return SR_ERR_DEV_CLOSED;
	240
bb993797	241	switch (key) {
ad9dbc1c KA	242	case SR_CONF_SAMPLERATE:
	243	devc->cur_samplerate = g_variant_get_uint64(data);
	244	return beaglelogic_set_samplerate(devc);
ad9dbc1c KA	245	case SR_CONF_LIMIT_SAMPLES:
	246	tmp_u64 = g_variant_get_uint64(data);
	247	devc->limit_samples = tmp_u64;
	248	devc->triggerflags = BL_TRIGGERFLAGS_ONESHOT;
	249
	250	/* Check if we have sufficient buffer size */
	251	tmp_u64 *= SAMPLEUNIT_TO_BYTES(devc->sampleunit);
	252	if (tmp_u64 > devc->buffersize) {
	253	sr_warn("Insufficient buffer space has been allocated.");
	254	sr_warn("Please use \'echo <size in bytes> > "\
	255	BEAGLELOGIC_SYSFS_ATTR(memalloc) \
	256	"\' as root to increase the buffer size, this"\
	257	" capture is now truncated to %d Msamples",
	258	devc->buffersize /
	259	(SAMPLEUNIT_TO_BYTES(devc->sampleunit) * 1000000));
	260	}
	261	return beaglelogic_set_triggerflags(devc);
e743a47d AJ	262	case SR_CONF_CAPTURE_RATIO:
e743a47d AJ	263	devc->capture_ratio = g_variant_get_uint64(data);
a5c38703	264	if (devc->capture_ratio > 100)
e743a47d	265	return SR_ERR;
e743a47d	266	return SR_OK;
bb993797	267	default:
ad9dbc1c	268	return SR_ERR_NA;
bb993797 KA	269	}
bb993797 KA	270
ad9dbc1c	271	return SR_OK;
bb993797 KA	272	}
bb993797 KA	273
584560f1	274	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
bb993797 KA	275	const struct sr_channel_group *cg)
	276	{
	277	int ret;
ad9dbc1c KA	278	GVariant *gvar;
ad9dbc1c KA	279	GVariantBuilder gvb;
bb993797 KA	280
bb993797 KA	281	(void)sdi;
bb993797 KA	282	(void)cg;
	283
	284	ret = SR_OK;
	285	switch (key) {
138589b0 BV	286	case SR_CONF_SCAN_OPTIONS:
	287	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	288	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
	289	break;
ad9dbc1c	290	case SR_CONF_DEVICE_OPTIONS:
584560f1	291	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
f254bc4b	292	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
ad9dbc1c KA	293	break;
	294	case SR_CONF_SAMPLERATE:
	295	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	296	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
	297	samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
	298	g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
	299	*data = g_variant_builder_end(&gvb);
	300	break;
	301	case SR_CONF_TRIGGER_MATCH:
af945a66	302	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
ad9dbc1c KA	303	soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
	304	sizeof(int32_t));
	305	break;
bb993797 KA	306	default:
	307	return SR_ERR_NA;
	308	}
	309
	310	return ret;
	311	}
	312
ad9dbc1c KA	313	/* get a sane timeout for poll() */
	314	#define BUFUNIT_TIMEOUT_MS(devc) (100 + ((devc->bufunitsize * 1000) / \
	315	(uint32_t)(devc->cur_samplerate)))
	316
695dc859	317	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
bb993797	318	{
ad9dbc1c KA	319	struct dev_context *devc = sdi->priv;
ad9dbc1c KA	320	struct sr_trigger *trigger;
bb993797 KA	321
	322	if (sdi->status != SR_ST_ACTIVE)
	323	return SR_ERR_DEV_CLOSED;
	324
ad9dbc1c KA	325	/* Clear capture state */
	326	devc->bytes_read = 0;
	327	devc->offset = 0;
	328
	329	/* Configure channels */
	330	devc->sampleunit = g_slist_length(sdi->channels) > 8 ?
	331	BL_SAMPLEUNIT_16_BITS : BL_SAMPLEUNIT_8_BITS;
	332	beaglelogic_set_sampleunit(devc);
	333
	334	/* Configure triggers & send header packet */
	335	if ((trigger = sr_session_trigger_get(sdi->session))) {
e743a47d AJ	336	int pre_trigger_samples = 0;
	337	if (devc->limit_samples > 0)
	338	pre_trigger_samples = devc->capture_ratio * devc->limit_samples/100;
	339	devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
98fec29e	340	if (!devc->stl)
e743a47d	341	return SR_ERR_MALLOC;
ad9dbc1c KA	342	devc->trigger_fired = FALSE;
	343	} else
	344	devc->trigger_fired = TRUE;
695dc859	345	std_session_send_df_header(sdi, LOG_PREFIX);
ad9dbc1c KA	346
	347	/* Trigger and add poll on file */
	348	beaglelogic_start(devc);
	349	sr_session_source_add_pollfd(sdi->session, &devc->pollfd,
	350	BUFUNIT_TIMEOUT_MS(devc), beaglelogic_receive_data,
	351	(void *)sdi);
bb993797 KA	352
	353	return SR_OK;
	354	}
	355
695dc859	356	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
bb993797	357	{
ad9dbc1c	358	struct dev_context *devc = sdi->priv;
ad9dbc1c	359
bb993797 KA	360	if (sdi->status != SR_ST_ACTIVE)
	361	return SR_ERR_DEV_CLOSED;
	362
ad9dbc1c KA	363	/* Execute a stop on BeagleLogic */
	364	beaglelogic_stop(devc);
	365
	366	/* lseek to offset 0, flushes the cache */
	367	lseek(devc->fd, 0, SEEK_SET);
	368
	369	/* Remove session source and send EOT packet */
	370	sr_session_source_remove_pollfd(sdi->session, &devc->pollfd);
3be42bc2	371	std_session_send_df_end(sdi, LOG_PREFIX);
bb993797 KA	372
	373	return SR_OK;
	374	}
	375
	376	SR_PRIV struct sr_dev_driver beaglelogic_driver_info = {
	377	.name = "beaglelogic",
	378	.longname = "BeagleLogic",
	379	.api_version = 1,
	380	.init = init,
700d6b64	381	.cleanup = std_cleanup,
bb993797 KA	382	.scan = scan,
	383	.dev_list = dev_list,
	384	.dev_clear = dev_clear,
	385	.config_get = config_get,
	386	.config_set = config_set,
	387	.config_list = config_list,
	388	.dev_open = dev_open,
	389	.dev_close = dev_close,
	390	.dev_acquisition_start = dev_acquisition_start,
	391	.dev_acquisition_stop = dev_acquisition_stop,
41812aca	392	.context = NULL,
bb993797	393	};