[libsigrok.git] / hardware / openbench-logic-sniffer / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
 *
 * 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"

#define SERIALCOMM "115200/8n1"

static const int32_t hwopts[] = {
	SR_CONF_CONN,
	SR_CONF_SERIALCOMM,
};

static const int32_t hwcaps[] = {
	SR_CONF_LOGIC_ANALYZER,
	SR_CONF_SAMPLERATE,
	SR_CONF_TRIGGER_TYPE,
	SR_CONF_CAPTURE_RATIO,
	SR_CONF_LIMIT_SAMPLES,
	SR_CONF_RLE,
};

/* Probes are numbered 0-31 (on the PCB silkscreen). */
SR_PRIV const char *ols_probe_names[NUM_PROBES + 1] = {
	"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
	"13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23",
	"24", "25", "26", "27", "28", "29", "30", "31",
	NULL,
};

/* Default supported samplerates, can be overridden by device metadata. */
static const uint64_t samplerates[] = {
	SR_HZ(10),
	SR_MHZ(200),
	SR_HZ(1),
};

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

static int init(struct sr_context *sr_ctx)
{
	return std_hw_init(sr_ctx, di, LOG_PREFIX);
}

static GSList *scan(GSList *options)
{
	struct sr_config *src;
	struct sr_dev_inst *sdi;
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_probe *probe;
	struct sr_serial_dev_inst *serial;
	GPollFD probefd;
	GSList *l, *devices;
	int ret, i;
	const char *conn, *serialcomm;
	char buf[8];

	drvc = di->priv;

	devices = NULL;

	conn = serialcomm = NULL;
	for (l = options; l; l = l->next) {
		src = l->data;
		switch (src->key) {
		case SR_CONF_CONN:
			conn = g_variant_get_string(src->data, NULL);
			break;
		case SR_CONF_SERIALCOMM:
			serialcomm = g_variant_get_string(src->data, NULL);
			break;
		}
	}
	if (!conn)
		return NULL;

	if (serialcomm == NULL)
		serialcomm = SERIALCOMM;

	if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
		return NULL;

	/* The discovery procedure is like this: first send the Reset
	 * command (0x00) 5 times, since the device could be anywhere
	 * in a 5-byte command. Then send the ID command (0x02).
	 * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
	 * have a match.
	 */
	sr_info("Probing %s.", conn);
	if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
		return NULL;

	ret = SR_OK;
	for (i = 0; i < 5; i++) {
		if ((ret = send_shortcommand(serial, CMD_RESET)) != SR_OK) {
			sr_err("Port %s is not writable.", conn);
			break;
		}
	}
	if (ret != SR_OK) {
		serial_close(serial);
		sr_err("Could not use port %s. Quitting.", conn);
		return NULL;
	}
	send_shortcommand(serial, CMD_ID);

	/* Wait 10ms for a response. */
	g_usleep(10000);

	probefd.fd = serial->fd;
	probefd.events = G_IO_IN;
	g_poll(&probefd, 1, 1);

	if (probefd.revents != G_IO_IN)
		return NULL;
	if (serial_read(serial, buf, 4) != 4)
		return NULL;
	if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4))
		return NULL;

	/* Definitely using the OLS protocol, check if it supports
	 * the metadata command.
	 */
	send_shortcommand(serial, CMD_METADATA);
	if (g_poll(&probefd, 1, 10) > 0) {
		/* Got metadata. */
		sdi = get_metadata(serial);
		sdi->index = 0;
		devc = sdi->priv;
	} else {
		/* Not an OLS -- some other board that uses the sump protocol. */
		sr_info("Device does not support metadata.");
		sdi = sr_dev_inst_new(0, SR_ST_INACTIVE,
				"Sump", "Logic Analyzer", "v1.0");
		sdi->driver = di;
		for (i = 0; i < 32; i++) {
			if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE,
					ols_probe_names[i])))
				return 0;
			sdi->probes = g_slist_append(sdi->probes, probe);
		}
		devc = ols_dev_new();
		sdi->priv = devc;
	}
	/* Configure samplerate and divider. */
	if (ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
		sr_dbg("Failed to set default samplerate (%"PRIu64").",
				DEFAULT_SAMPLERATE);
	/* Clear trigger masks, values and stages. */
	ols_configure_probes(sdi);
	sdi->inst_type = SR_INST_SERIAL;
	sdi->conn = serial;

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

	serial_close(serial);

	return devices;
}

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

static int dev_open(struct sr_dev_inst *sdi)
{
	struct sr_serial_dev_inst *serial;

	serial = sdi->conn;
	if (serial_open(serial, SERIAL_RDWR) != SR_OK)
		return SR_ERR;

	sdi->status = SR_ST_ACTIVE;

	return SR_OK;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	struct sr_serial_dev_inst *serial;

	serial = sdi->conn;
	if (serial && serial->fd != -1) {
		serial_close(serial);
		sdi->status = SR_ST_INACTIVE;
	}

	return SR_OK;
}

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

static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;

	if (!sdi)
		return SR_ERR_ARG;

	devc = sdi->priv;
	switch (id) {
	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_LIMIT_SAMPLES:
		*data = g_variant_new_uint64(devc->limit_samples);
		break;
	case SR_CONF_RLE:
		*data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	int ret;
	uint64_t tmp_u64;

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

	devc = sdi->priv;

	switch (id) {
	case SR_CONF_SAMPLERATE:
		tmp_u64 = g_variant_get_uint64(data);
		if (tmp_u64 < samplerates[0] || tmp_u64 > samplerates[1])
			return SR_ERR_SAMPLERATE;
		ret = ols_set_samplerate(sdi, g_variant_get_uint64(data));
		break;
	case SR_CONF_LIMIT_SAMPLES:
		tmp_u64 = g_variant_get_uint64(data);
		if (tmp_u64 < MIN_NUM_SAMPLES)
			return SR_ERR;
		devc->limit_samples = tmp_u64;
		ret = SR_OK;
		break;
	case SR_CONF_CAPTURE_RATIO:
		devc->capture_ratio = g_variant_get_uint64(data);
		if (devc->capture_ratio < 0 || devc->capture_ratio > 100) {
			devc->capture_ratio = 0;
			ret = SR_ERR;
		} else
			ret = SR_OK;
		break;
	case SR_CONF_RLE:
		if (g_variant_get_boolean(data)) {
			sr_info("Enabling RLE.");
			devc->flag_reg |= FLAG_RLE;
		} else {
			sr_info("Disabling RLE.");
			devc->flag_reg &= ~FLAG_RLE;
		}
		ret = SR_OK;
		break;
	default:
		ret = SR_ERR_NA;
	}

	return ret;
}

static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
{
	GVariant *gvar;
	GVariantBuilder gvb;

	(void)sdi;

	switch (key) {
	case SR_CONF_SCAN_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
				hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
		break;
	case SR_CONF_DEVICE_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
				hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_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_TYPE:
		*data = g_variant_new_string(TRIGGER_TYPE);
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi,
		void *cb_data)
{
	struct dev_context *devc;
	struct sr_serial_dev_inst *serial;
	uint32_t trigger_config[4];
	uint32_t data;
	uint16_t readcount, delaycount;
	uint8_t changrp_mask;
	int num_channels;
	int i;

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

	devc = sdi->priv;
	serial = sdi->conn;

	if (ols_configure_probes(sdi) != SR_OK) {
		sr_err("Failed to configure probes.");
		return SR_ERR;
	}

	/*
	 * Enable/disable channel groups in the flag register according to the
	 * probe mask. Calculate this here, because num_channels is needed
	 * to limit readcount.
	 */
	changrp_mask = 0;
	num_channels = 0;
	for (i = 0; i < 4; i++) {
		if (devc->probe_mask & (0xff << (i * 8))) {
			changrp_mask |= (1 << i);
			num_channels++;
		}
	}

	/*
	 * Limit readcount to prevent reading past the end of the hardware
	 * buffer.
	 */
	readcount = MIN(devc->max_samples / num_channels, devc->limit_samples) / 4;

	memset(trigger_config, 0, 16);
	trigger_config[devc->num_stages] |= 0x08;
	if (devc->trigger_mask[0]) {
		delaycount = readcount * (1 - devc->capture_ratio / 100.0);
		devc->trigger_at = (readcount - delaycount) * 4 - devc->num_stages;

		if (send_longcommand(serial, CMD_SET_TRIGGER_MASK_0,
			reverse32(devc->trigger_mask[0])) != SR_OK)
			return SR_ERR;
		if (send_longcommand(serial, CMD_SET_TRIGGER_VALUE_0,
			reverse32(devc->trigger_value[0])) != SR_OK)
			return SR_ERR;
		if (send_longcommand(serial, CMD_SET_TRIGGER_CONFIG_0,
			trigger_config[0]) != SR_OK)
			return SR_ERR;

		if (send_longcommand(serial, CMD_SET_TRIGGER_MASK_1,
			reverse32(devc->trigger_mask[1])) != SR_OK)
			return SR_ERR;
		if (send_longcommand(serial, CMD_SET_TRIGGER_VALUE_1,
			reverse32(devc->trigger_value[1])) != SR_OK)
			return SR_ERR;
		if (send_longcommand(serial, CMD_SET_TRIGGER_CONFIG_1,
			trigger_config[1]) != SR_OK)
			return SR_ERR;

		if (send_longcommand(serial, CMD_SET_TRIGGER_MASK_2,
			reverse32(devc->trigger_mask[2])) != SR_OK)
			return SR_ERR;
		if (send_longcommand(serial, CMD_SET_TRIGGER_VALUE_2,
			reverse32(devc->trigger_value[2])) != SR_OK)
			return SR_ERR;
		if (send_longcommand(serial, CMD_SET_TRIGGER_CONFIG_2,
			trigger_config[2]) != SR_OK)
			return SR_ERR;

		if (send_longcommand(serial, CMD_SET_TRIGGER_MASK_3,
			reverse32(devc->trigger_mask[3])) != SR_OK)
			return SR_ERR;
		if (send_longcommand(serial, CMD_SET_TRIGGER_VALUE_3,
			reverse32(devc->trigger_value[3])) != SR_OK)
			return SR_ERR;
		if (send_longcommand(serial, CMD_SET_TRIGGER_CONFIG_3,
			trigger_config[3]) != SR_OK)
			return SR_ERR;
	} else {
		if (send_longcommand(serial, CMD_SET_TRIGGER_MASK_0,
				devc->trigger_mask[0]) != SR_OK)
			return SR_ERR;
		if (send_longcommand(serial, CMD_SET_TRIGGER_VALUE_0,
				devc->trigger_value[0]) != SR_OK)
			return SR_ERR;
		if (send_longcommand(serial, CMD_SET_TRIGGER_CONFIG_0,
		     0x00000008) != SR_OK)
			return SR_ERR;
		delaycount = readcount;
	}

	sr_info("Setting samplerate to %" PRIu64 "Hz (divider %u, "
		"demux %s)", devc->cur_samplerate, devc->cur_samplerate_divider,
		devc->flag_reg & FLAG_DEMUX ? "on" : "off");
	if (send_longcommand(serial, CMD_SET_DIVIDER,
			reverse32(devc->cur_samplerate_divider)) != SR_OK)
		return SR_ERR;

	/* Send sample limit and pre/post-trigger capture ratio. */
	data = ((readcount - 1) & 0xffff) << 16;
	data |= (delaycount - 1) & 0xffff;
	if (send_longcommand(serial, CMD_CAPTURE_SIZE, reverse16(data)) != SR_OK)
		return SR_ERR;

	/* The flag register wants them here, and 1 means "disable channel". */
	devc->flag_reg |= ~(changrp_mask << 2) & 0x3c;
	devc->flag_reg |= FLAG_FILTER;
	devc->rle_count = 0;
	data = (devc->flag_reg << 24) | ((devc->flag_reg << 8) & 0xff0000);
	if (send_longcommand(serial, CMD_SET_FLAGS, data) != SR_OK)
		return SR_ERR;

	/* Start acquisition on the device. */
	if (send_shortcommand(serial, CMD_RUN) != SR_OK)
		return SR_ERR;

	/* Reset all operational states. */
	devc->num_transfers = devc->num_samples = devc->num_bytes = 0;

	/* Send header packet to the session bus. */
	std_session_send_df_header(cb_data, LOG_PREFIX);

	sr_source_add(serial->fd, G_IO_IN, -1, ols_receive_data, cb_data);

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
	(void)cb_data;

	abort_acquisition(sdi);

	return SR_OK;
}

SR_PRIV struct sr_dev_driver ols_driver_info = {
	.name = "ols",
	.longname = "Openbench Logic Sniffer",
	.api_version = 1,
	.init = init,
	.cleanup = dev_clear,
	.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
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
	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"
	21
	22	#define SERIALCOMM "115200/8n1"
	23
	24	static const int32_t hwopts[] = {
	25	SR_CONF_CONN,
	26	SR_CONF_SERIALCOMM,
	27	};
	28
	29	static const int32_t hwcaps[] = {
	30	SR_CONF_LOGIC_ANALYZER,
	31	SR_CONF_SAMPLERATE,
	32	SR_CONF_TRIGGER_TYPE,
	33	SR_CONF_CAPTURE_RATIO,
	34	SR_CONF_LIMIT_SAMPLES,
	35	SR_CONF_RLE,
	36	};
	37
	38	/* Probes are numbered 0-31 (on the PCB silkscreen). */
	39	SR_PRIV const char *ols_probe_names[NUM_PROBES + 1] = {
	40	"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
	41	"13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23",
	42	"24", "25", "26", "27", "28", "29", "30", "31",
	43	NULL,
	44	};
	45
	46	/* Default supported samplerates, can be overridden by device metadata. */
	47	static const uint64_t samplerates[] = {
	48	SR_HZ(10),
	49	SR_MHZ(200),
	50	SR_HZ(1),
	51	};
	52
	53	SR_PRIV struct sr_dev_driver ols_driver_info;
	54	static struct sr_dev_driver *di = &ols_driver_info;
	55
	56	static int init(struct sr_context *sr_ctx)
	57	{
	58	return std_hw_init(sr_ctx, di, LOG_PREFIX);
	59	}
	60
	61	static GSList scan(GSList options)
	62	{
	63	struct sr_config *src;
	64	struct sr_dev_inst *sdi;
	65	struct drv_context *drvc;
	66	struct dev_context *devc;
	67	struct sr_probe *probe;
	68	struct sr_serial_dev_inst *serial;
	69	GPollFD probefd;
	70	GSList l, devices;
	71	int ret, i;
	72	const char conn, serialcomm;
	73	char buf[8];
	74
	75	drvc = di->priv;
	76
	77	devices = NULL;
	78
	79	conn = serialcomm = NULL;
	80	for (l = options; l; l = l->next) {
	81	src = l->data;
	82	switch (src->key) {
	83	case SR_CONF_CONN:
	84	conn = g_variant_get_string(src->data, NULL);
	85	break;
	86	case SR_CONF_SERIALCOMM:
	87	serialcomm = g_variant_get_string(src->data, NULL);
	88	break;
	89	}
	90	}
	91	if (!conn)
	92	return NULL;
	93
	94	if (serialcomm == NULL)
	95	serialcomm = SERIALCOMM;
	96
	97	if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
	98	return NULL;
	99
	100	/* The discovery procedure is like this: first send the Reset
	101	* command (0x00) 5 times, since the device could be anywhere
	102	* in a 5-byte command. Then send the ID command (0x02).
	103	* If the device responds with 4 bytes ("OLS1" or "SLA1"), we
	104	* have a match.
	105	*/
	106	sr_info("Probing %s.", conn);
	107	if (serial_open(serial, SERIAL_RDWR \| SERIAL_NONBLOCK) != SR_OK)
	108	return NULL;
	109
	110	ret = SR_OK;
	111	for (i = 0; i < 5; i++) {
	112	if ((ret = send_shortcommand(serial, CMD_RESET)) != SR_OK) {
	113	sr_err("Port %s is not writable.", conn);
	114	break;
	115	}
	116	}
	117	if (ret != SR_OK) {
	118	serial_close(serial);
	119	sr_err("Could not use port %s. Quitting.", conn);
	120	return NULL;
	121	}
	122	send_shortcommand(serial, CMD_ID);
	123
	124	/* Wait 10ms for a response. */
	125	g_usleep(10000);
	126
	127	probefd.fd = serial->fd;
	128	probefd.events = G_IO_IN;
	129	g_poll(&probefd, 1, 1);
	130
	131	if (probefd.revents != G_IO_IN)
	132	return NULL;
	133	if (serial_read(serial, buf, 4) != 4)
	134	return NULL;
	135	if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4))
	136	return NULL;
	137
	138	/* Definitely using the OLS protocol, check if it supports
	139	* the metadata command.
	140	*/
	141	send_shortcommand(serial, CMD_METADATA);
	142	if (g_poll(&probefd, 1, 10) > 0) {
	143	/* Got metadata. */
	144	sdi = get_metadata(serial);
	145	sdi->index = 0;
	146	devc = sdi->priv;
	147	} else {
	148	/* Not an OLS -- some other board that uses the sump protocol. */
	149	sr_info("Device does not support metadata.");
	150	sdi = sr_dev_inst_new(0, SR_ST_INACTIVE,
	151	"Sump", "Logic Analyzer", "v1.0");
	152	sdi->driver = di;
	153	for (i = 0; i < 32; i++) {
	154	if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE,
	155	ols_probe_names[i])))
	156	return 0;
	157	sdi->probes = g_slist_append(sdi->probes, probe);
	158	}
	159	devc = ols_dev_new();
	160	sdi->priv = devc;
	161	}
	162	/* Configure samplerate and divider. */
	163	if (ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
	164	sr_dbg("Failed to set default samplerate (%"PRIu64").",
	165	DEFAULT_SAMPLERATE);
	166	/* Clear trigger masks, values and stages. */
	167	ols_configure_probes(sdi);
	168	sdi->inst_type = SR_INST_SERIAL;
	169	sdi->conn = serial;
	170
	171	drvc->instances = g_slist_append(drvc->instances, sdi);
	172	devices = g_slist_append(devices, sdi);
	173
	174	serial_close(serial);
	175
	176	return devices;
	177	}
	178
	179	static GSList *dev_list(void)
	180	{
	181	return ((struct drv_context *)(di->priv))->instances;
	182	}
	183
	184	static int dev_open(struct sr_dev_inst *sdi)
	185	{
	186	struct sr_serial_dev_inst *serial;
	187
	188	serial = sdi->conn;
	189	if (serial_open(serial, SERIAL_RDWR) != SR_OK)
	190	return SR_ERR;
	191
	192	sdi->status = SR_ST_ACTIVE;
	193
	194	return SR_OK;
	195	}
	196
	197	static int dev_close(struct sr_dev_inst *sdi)
	198	{
	199	struct sr_serial_dev_inst *serial;
	200
	201	serial = sdi->conn;
	202	if (serial && serial->fd != -1) {
	203	serial_close(serial);
	204	sdi->status = SR_ST_INACTIVE;
	205	}
	206
	207	return SR_OK;
	208	}
	209
	210	static int dev_clear(void)
	211	{
	212	return std_dev_clear(di, NULL);
	213	}
	214
	215	static int config_get(int id, GVariant *data, const struct sr_dev_inst sdi)
	216	{
	217	struct dev_context *devc;
	218
	219	if (!sdi)
	220	return SR_ERR_ARG;
	221
	222	devc = sdi->priv;
	223	switch (id) {
	224	case SR_CONF_SAMPLERATE:
	225	*data = g_variant_new_uint64(devc->cur_samplerate);
	226	break;
	227	case SR_CONF_CAPTURE_RATIO:
	228	*data = g_variant_new_uint64(devc->capture_ratio);
	229	break;
	230	case SR_CONF_LIMIT_SAMPLES:
	231	*data = g_variant_new_uint64(devc->limit_samples);
	232	break;
	233	case SR_CONF_RLE:
	234	*data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
	235	break;
	236	default:
	237	return SR_ERR_NA;
	238	}
	239
	240	return SR_OK;
	241	}
	242
	243	static int config_set(int id, GVariant data, const struct sr_dev_inst sdi)
	244	{
	245	struct dev_context *devc;
	246	int ret;
	247	uint64_t tmp_u64;
	248
	249	if (sdi->status != SR_ST_ACTIVE)
	250	return SR_ERR_DEV_CLOSED;
	251
	252	devc = sdi->priv;
	253
	254	switch (id) {
	255	case SR_CONF_SAMPLERATE:
	256	tmp_u64 = g_variant_get_uint64(data);
	257	if (tmp_u64 < samplerates[0] \|\| tmp_u64 > samplerates[1])
	258	return SR_ERR_SAMPLERATE;
	259	ret = ols_set_samplerate(sdi, g_variant_get_uint64(data));
	260	break;
	261	case SR_CONF_LIMIT_SAMPLES:
	262	tmp_u64 = g_variant_get_uint64(data);
	263	if (tmp_u64 < MIN_NUM_SAMPLES)
	264	return SR_ERR;
	265	devc->limit_samples = tmp_u64;
	266	ret = SR_OK;
	267	break;
	268	case SR_CONF_CAPTURE_RATIO:
	269	devc->capture_ratio = g_variant_get_uint64(data);
	270	if (devc->capture_ratio < 0 \|\| devc->capture_ratio > 100) {
	271	devc->capture_ratio = 0;
	272	ret = SR_ERR;
	273	} else
	274	ret = SR_OK;
	275	break;
	276	case SR_CONF_RLE:
	277	if (g_variant_get_boolean(data)) {
	278	sr_info("Enabling RLE.");
	279	devc->flag_reg \|= FLAG_RLE;
	280	} else {
	281	sr_info("Disabling RLE.");
	282	devc->flag_reg &= ~FLAG_RLE;
	283	}
	284	ret = SR_OK;
	285	break;
	286	default:
	287	ret = SR_ERR_NA;
	288	}
	289
	290	return ret;
	291	}
	292
	293	static int config_list(int key, GVariant *data, const struct sr_dev_inst sdi)
	294	{
	295	GVariant *gvar;
	296	GVariantBuilder gvb;
	297
	298	(void)sdi;
	299
	300	switch (key) {
	301	case SR_CONF_SCAN_OPTIONS:
	302	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	303	hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
	304	break;
	305	case SR_CONF_DEVICE_OPTIONS:
	306	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	307	hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
	308	break;
	309	case SR_CONF_SAMPLERATE:
	310	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	311	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
	312	ARRAY_SIZE(samplerates), sizeof(uint64_t));
	313	g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
	314	*data = g_variant_builder_end(&gvb);
	315	break;
	316	case SR_CONF_TRIGGER_TYPE:
	317	*data = g_variant_new_string(TRIGGER_TYPE);
	318	break;
	319	default:
	320	return SR_ERR_NA;
	321	}
	322
	323	return SR_OK;
	324	}
	325
	326	static int dev_acquisition_start(const struct sr_dev_inst *sdi,
	327	void *cb_data)
	328	{
	329	struct dev_context *devc;
	330	struct sr_serial_dev_inst *serial;
	331	uint32_t trigger_config[4];
	332	uint32_t data;
	333	uint16_t readcount, delaycount;
	334	uint8_t changrp_mask;
	335	int num_channels;
	336	int i;
	337
	338	if (sdi->status != SR_ST_ACTIVE)
	339	return SR_ERR_DEV_CLOSED;
	340
	341	devc = sdi->priv;
	342	serial = sdi->conn;
	343
	344	if (ols_configure_probes(sdi) != SR_OK) {
	345	sr_err("Failed to configure probes.");
	346	return SR_ERR;
	347	}
	348
	349	/*
	350	* Enable/disable channel groups in the flag register according to the
	351	* probe mask. Calculate this here, because num_channels is needed
	352	* to limit readcount.
	353	*/
	354	changrp_mask = 0;
	355	num_channels = 0;
	356	for (i = 0; i < 4; i++) {
	357	if (devc->probe_mask & (0xff << (i * 8))) {
	358	changrp_mask \|= (1 << i);
	359	num_channels++;
	360	}
	361	}
	362
	363	/*
	364	* Limit readcount to prevent reading past the end of the hardware
	365	* buffer.
	366	*/
	367	readcount = MIN(devc->max_samples / num_channels, devc->limit_samples) / 4;
	368
	369	memset(trigger_config, 0, 16);
	370	trigger_config[devc->num_stages] \|= 0x08;
	371	if (devc->trigger_mask[0]) {
	372	delaycount = readcount * (1 - devc->capture_ratio / 100.0);
	373	devc->trigger_at = (readcount - delaycount) * 4 - devc->num_stages;
	374
	375	if (send_longcommand(serial, CMD_SET_TRIGGER_MASK_0,
	376	reverse32(devc->trigger_mask[0])) != SR_OK)
	377	return SR_ERR;
	378	if (send_longcommand(serial, CMD_SET_TRIGGER_VALUE_0,
	379	reverse32(devc->trigger_value[0])) != SR_OK)
	380	return SR_ERR;
	381	if (send_longcommand(serial, CMD_SET_TRIGGER_CONFIG_0,
	382	trigger_config[0]) != SR_OK)
	383	return SR_ERR;
	384
	385	if (send_longcommand(serial, CMD_SET_TRIGGER_MASK_1,
	386	reverse32(devc->trigger_mask[1])) != SR_OK)
	387	return SR_ERR;
	388	if (send_longcommand(serial, CMD_SET_TRIGGER_VALUE_1,
	389	reverse32(devc->trigger_value[1])) != SR_OK)
	390	return SR_ERR;
	391	if (send_longcommand(serial, CMD_SET_TRIGGER_CONFIG_1,
	392	trigger_config[1]) != SR_OK)
	393	return SR_ERR;
	394
	395	if (send_longcommand(serial, CMD_SET_TRIGGER_MASK_2,
	396	reverse32(devc->trigger_mask[2])) != SR_OK)
	397	return SR_ERR;
	398	if (send_longcommand(serial, CMD_SET_TRIGGER_VALUE_2,
	399	reverse32(devc->trigger_value[2])) != SR_OK)
	400	return SR_ERR;
	401	if (send_longcommand(serial, CMD_SET_TRIGGER_CONFIG_2,
	402	trigger_config[2]) != SR_OK)
	403	return SR_ERR;
	404
	405	if (send_longcommand(serial, CMD_SET_TRIGGER_MASK_3,
	406	reverse32(devc->trigger_mask[3])) != SR_OK)
	407	return SR_ERR;
	408	if (send_longcommand(serial, CMD_SET_TRIGGER_VALUE_3,
	409	reverse32(devc->trigger_value[3])) != SR_OK)
	410	return SR_ERR;
	411	if (send_longcommand(serial, CMD_SET_TRIGGER_CONFIG_3,
	412	trigger_config[3]) != SR_OK)
	413	return SR_ERR;
	414	} else {
	415	if (send_longcommand(serial, CMD_SET_TRIGGER_MASK_0,
	416	devc->trigger_mask[0]) != SR_OK)
	417	return SR_ERR;
	418	if (send_longcommand(serial, CMD_SET_TRIGGER_VALUE_0,
	419	devc->trigger_value[0]) != SR_OK)
	420	return SR_ERR;
	421	if (send_longcommand(serial, CMD_SET_TRIGGER_CONFIG_0,
	422	0x00000008) != SR_OK)
	423	return SR_ERR;
	424	delaycount = readcount;
	425	}
	426
	427	sr_info("Setting samplerate to %" PRIu64 "Hz (divider %u, "
	428	"demux %s)", devc->cur_samplerate, devc->cur_samplerate_divider,
	429	devc->flag_reg & FLAG_DEMUX ? "on" : "off");
	430	if (send_longcommand(serial, CMD_SET_DIVIDER,
	431	reverse32(devc->cur_samplerate_divider)) != SR_OK)
	432	return SR_ERR;
	433
	434	/* Send sample limit and pre/post-trigger capture ratio. */
	435	data = ((readcount - 1) & 0xffff) << 16;
	436	data \|= (delaycount - 1) & 0xffff;
	437	if (send_longcommand(serial, CMD_CAPTURE_SIZE, reverse16(data)) != SR_OK)
	438	return SR_ERR;
	439
	440	/* The flag register wants them here, and 1 means "disable channel". */
	441	devc->flag_reg \|= ~(changrp_mask << 2) & 0x3c;
	442	devc->flag_reg \|= FLAG_FILTER;
	443	devc->rle_count = 0;
	444	data = (devc->flag_reg << 24) \| ((devc->flag_reg << 8) & 0xff0000);
	445	if (send_longcommand(serial, CMD_SET_FLAGS, data) != SR_OK)
	446	return SR_ERR;
	447
	448	/* Start acquisition on the device. */
	449	if (send_shortcommand(serial, CMD_RUN) != SR_OK)
	450	return SR_ERR;
	451
	452	/* Reset all operational states. */
	453	devc->num_transfers = devc->num_samples = devc->num_bytes = 0;
	454
	455	/* Send header packet to the session bus. */
	456	std_session_send_df_header(cb_data, LOG_PREFIX);
	457
	458	sr_source_add(serial->fd, G_IO_IN, -1, ols_receive_data, cb_data);
	459
	460	return SR_OK;
	461	}
	462
	463	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	464	{
	465	(void)cb_data;
	466
	467	abort_acquisition(sdi);
	468
	469	return SR_OK;
	470	}
	471
	472	SR_PRIV struct sr_dev_driver ols_driver_info = {
	473	.name = "ols",
	474	.longname = "Openbench Logic Sniffer",
	475	.api_version = 1,
	476	.init = init,
	477	.cleanup = dev_clear,
	478	.scan = scan,
	479	.dev_list = dev_list,
	480	.dev_clear = dev_clear,
	481	.config_get = config_get,
	482	.config_set = config_set,
	483	.config_list = config_list,
	484	.dev_open = dev_open,
	485	.dev_close = dev_close,
	486	.dev_acquisition_start = dev_acquisition_start,
	487	.dev_acquisition_stop = dev_acquisition_stop,
	488	.priv = NULL,
	489	};