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

static int init(struct sr_context *sr_ctx)
{
	return std_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 cleanup(void)
{
	return dev_clear();
}

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 = 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
	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 dev_clear(void)
	57	{
	58	return std_dev_clear(di, NULL);
	59	}
	60
	61	static int init(struct sr_context *sr_ctx)
	62	{
	63	return std_init(sr_ctx, di, LOG_PREFIX);
	64	}
	65
	66	static GSList scan(GSList options)
	67	{
	68	struct sr_config *src;
	69	struct sr_dev_inst *sdi;
	70	struct drv_context *drvc;
	71	struct dev_context *devc;
	72	struct sr_probe *probe;
	73	struct sr_serial_dev_inst *serial;
	74	GPollFD probefd;
	75	GSList l, devices;
	76	int ret, i;
	77	const char conn, serialcomm;
	78	char buf[8];
	79
	80	drvc = di->priv;
	81
	82	devices = NULL;
	83
	84	conn = serialcomm = NULL;
	85	for (l = options; l; l = l->next) {
	86	src = l->data;
	87	switch (src->key) {
	88	case SR_CONF_CONN:
	89	conn = g_variant_get_string(src->data, NULL);
	90	break;
	91	case SR_CONF_SERIALCOMM:
	92	serialcomm = g_variant_get_string(src->data, NULL);
	93	break;
	94	}
	95	}
	96	if (!conn)
	97	return NULL;
	98
	99	if (serialcomm == NULL)
	100	serialcomm = SERIALCOMM;
	101
	102	if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
	103	return NULL;
	104
	105	/* The discovery procedure is like this: first send the Reset
	106	* command (0x00) 5 times, since the device could be anywhere
	107	* in a 5-byte command. Then send the ID command (0x02).
	108	* If the device responds with 4 bytes ("OLS1" or "SLA1"), we
	109	* have a match.
	110	*/
	111	sr_info("Probing %s.", conn);
	112	if (serial_open(serial, SERIAL_RDWR \| SERIAL_NONBLOCK) != SR_OK)
	113	return NULL;
	114
	115	ret = SR_OK;
	116	for (i = 0; i < 5; i++) {
	117	if ((ret = send_shortcommand(serial, CMD_RESET)) != SR_OK) {
	118	sr_err("Port %s is not writable.", conn);
	119	break;
	120	}
	121	}
	122	if (ret != SR_OK) {
	123	serial_close(serial);
	124	sr_err("Could not use port %s. Quitting.", conn);
	125	return NULL;
	126	}
	127	send_shortcommand(serial, CMD_ID);
	128
	129	/* Wait 10ms for a response. */
	130	g_usleep(10000);
	131
	132	probefd.fd = serial->fd;
	133	probefd.events = G_IO_IN;
	134	g_poll(&probefd, 1, 1);
	135
	136	if (probefd.revents != G_IO_IN)
	137	return NULL;
	138	if (serial_read(serial, buf, 4) != 4)
	139	return NULL;
	140	if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4))
	141	return NULL;
	142
	143	/* Definitely using the OLS protocol, check if it supports
	144	* the metadata command.
	145	*/
	146	send_shortcommand(serial, CMD_METADATA);
	147	if (g_poll(&probefd, 1, 10) > 0) {
	148	/* Got metadata. */
	149	sdi = get_metadata(serial);
	150	sdi->index = 0;
	151	devc = sdi->priv;
	152	} else {
	153	/* Not an OLS -- some other board that uses the sump protocol. */
	154	sr_info("Device does not support metadata.");
	155	sdi = sr_dev_inst_new(0, SR_ST_INACTIVE,
	156	"Sump", "Logic Analyzer", "v1.0");
	157	sdi->driver = di;
	158	for (i = 0; i < 32; i++) {
	159	if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE,
	160	ols_probe_names[i])))
	161	return 0;
	162	sdi->probes = g_slist_append(sdi->probes, probe);
	163	}
	164	devc = ols_dev_new();
	165	sdi->priv = devc;
	166	}
	167	/* Configure samplerate and divider. */
	168	if (ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
	169	sr_dbg("Failed to set default samplerate (%"PRIu64").",
	170	DEFAULT_SAMPLERATE);
	171	/* Clear trigger masks, values and stages. */
	172	ols_configure_probes(sdi);
	173	sdi->inst_type = SR_INST_SERIAL;
	174	sdi->conn = serial;
	175
	176	drvc->instances = g_slist_append(drvc->instances, sdi);
	177	devices = g_slist_append(devices, sdi);
	178
	179	serial_close(serial);
	180
	181	return devices;
	182	}
	183
	184	static GSList *dev_list(void)
	185	{
	186	return ((struct drv_context *)(di->priv))->instances;
	187	}
	188
	189	static int dev_open(struct sr_dev_inst *sdi)
	190	{
	191	struct sr_serial_dev_inst *serial;
	192
	193	serial = sdi->conn;
	194	if (serial_open(serial, SERIAL_RDWR) != SR_OK)
	195	return SR_ERR;
	196
	197	sdi->status = SR_ST_ACTIVE;
	198
	199	return SR_OK;
	200	}
	201
	202	static int dev_close(struct sr_dev_inst *sdi)
	203	{
	204	struct sr_serial_dev_inst *serial;
	205
	206	serial = sdi->conn;
	207	if (serial && serial->fd != -1) {
	208	serial_close(serial);
	209	sdi->status = SR_ST_INACTIVE;
	210	}
	211
	212	return SR_OK;
	213	}
	214
	215	static int cleanup(void)
	216	{
	217	return dev_clear();
	218	}
	219
	220	static int config_get(int id, GVariant *data, const struct sr_dev_inst sdi)
	221	{
	222	struct dev_context *devc;
	223
	224	if (!sdi)
	225	return SR_ERR_ARG;
	226
	227	devc = sdi->priv;
	228	switch (id) {
	229	case SR_CONF_SAMPLERATE:
	230	*data = g_variant_new_uint64(devc->cur_samplerate);
	231	break;
	232	case SR_CONF_CAPTURE_RATIO:
	233	*data = g_variant_new_uint64(devc->capture_ratio);
	234	break;
	235	case SR_CONF_LIMIT_SAMPLES:
	236	*data = g_variant_new_uint64(devc->limit_samples);
	237	break;
	238	case SR_CONF_RLE:
	239	*data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
	240	break;
	241	default:
	242	return SR_ERR_NA;
	243	}
	244
	245	return SR_OK;
	246	}
	247
	248	static int config_set(int id, GVariant data, const struct sr_dev_inst sdi)
	249	{
	250	struct dev_context *devc;
	251	int ret;
	252	uint64_t tmp_u64;
	253
	254	if (sdi->status != SR_ST_ACTIVE)
	255	return SR_ERR_DEV_CLOSED;
	256
	257	devc = sdi->priv;
	258
	259	switch (id) {
	260	case SR_CONF_SAMPLERATE:
	261	tmp_u64 = g_variant_get_uint64(data);
	262	if (tmp_u64 < samplerates[0] \|\| tmp_u64 > samplerates[1])
	263	return SR_ERR_SAMPLERATE;
	264	ret = ols_set_samplerate(sdi, g_variant_get_uint64(data));
	265	break;
	266	case SR_CONF_LIMIT_SAMPLES:
	267	tmp_u64 = g_variant_get_uint64(data);
	268	if (tmp_u64 < MIN_NUM_SAMPLES)
	269	return SR_ERR;
	270	devc->limit_samples = tmp_u64;
	271	ret = SR_OK;
	272	break;
	273	case SR_CONF_CAPTURE_RATIO:
	274	devc->capture_ratio = g_variant_get_uint64(data);
	275	if (devc->capture_ratio < 0 \|\| devc->capture_ratio > 100) {
	276	devc->capture_ratio = 0;
	277	ret = SR_ERR;
	278	} else
	279	ret = SR_OK;
	280	break;
	281	case SR_CONF_RLE:
	282	if (g_variant_get_boolean(data)) {
	283	sr_info("Enabling RLE.");
	284	devc->flag_reg \|= FLAG_RLE;
	285	} else {
	286	sr_info("Disabling RLE.");
	287	devc->flag_reg &= ~FLAG_RLE;
	288	}
	289	ret = SR_OK;
	290	break;
	291	default:
	292	ret = SR_ERR_NA;
	293	}
	294
	295	return ret;
	296	}
	297
	298	static int config_list(int key, GVariant *data, const struct sr_dev_inst sdi)
	299	{
	300	GVariant *gvar;
	301	GVariantBuilder gvb;
	302
	303	(void)sdi;
	304
	305	switch (key) {
	306	case SR_CONF_SCAN_OPTIONS:
	307	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	308	hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
	309	break;
	310	case SR_CONF_DEVICE_OPTIONS:
	311	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	312	hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
	313	break;
	314	case SR_CONF_SAMPLERATE:
	315	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	316	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
	317	ARRAY_SIZE(samplerates), sizeof(uint64_t));
	318	g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
	319	*data = g_variant_builder_end(&gvb);
	320	break;
	321	case SR_CONF_TRIGGER_TYPE:
	322	*data = g_variant_new_string(TRIGGER_TYPE);
	323	break;
	324	default:
	325	return SR_ERR_NA;
	326	}
	327
	328	return SR_OK;
	329	}
	330
	331	static int dev_acquisition_start(const struct sr_dev_inst *sdi,
	332	void *cb_data)
	333	{
	334	struct dev_context *devc;
	335	struct sr_serial_dev_inst *serial;
	336	uint32_t trigger_config[4];
	337	uint32_t data;
	338	uint16_t readcount, delaycount;
	339	uint8_t changrp_mask;
	340	int num_channels;
	341	int i;
	342
	343	if (sdi->status != SR_ST_ACTIVE)
	344	return SR_ERR_DEV_CLOSED;
	345
	346	devc = sdi->priv;
	347	serial = sdi->conn;
	348
	349	if (ols_configure_probes(sdi) != SR_OK) {
	350	sr_err("Failed to configure probes.");
	351	return SR_ERR;
	352	}
	353
	354	/*
	355	* Enable/disable channel groups in the flag register according to the
	356	* probe mask. Calculate this here, because num_channels is needed
	357	* to limit readcount.
	358	*/
	359	changrp_mask = 0;
	360	num_channels = 0;
	361	for (i = 0; i < 4; i++) {
	362	if (devc->probe_mask & (0xff << (i * 8))) {
	363	changrp_mask \|= (1 << i);
	364	num_channels++;
	365	}
	366	}
	367
	368	/*
	369	* Limit readcount to prevent reading past the end of the hardware
	370	* buffer.
	371	*/
	372	readcount = MIN(devc->max_samples / num_channels, devc->limit_samples) / 4;
	373
	374	memset(trigger_config, 0, 16);
	375	trigger_config[devc->num_stages] \|= 0x08;
	376	if (devc->trigger_mask[0]) {
	377	delaycount = readcount * (1 - devc->capture_ratio / 100.0);
	378	devc->trigger_at = (readcount - delaycount) * 4 - devc->num_stages;
	379
	380	if (send_longcommand(serial, CMD_SET_TRIGGER_MASK_0,
	381	reverse32(devc->trigger_mask[0])) != SR_OK)
	382	return SR_ERR;
	383	if (send_longcommand(serial, CMD_SET_TRIGGER_VALUE_0,
	384	reverse32(devc->trigger_value[0])) != SR_OK)
	385	return SR_ERR;
	386	if (send_longcommand(serial, CMD_SET_TRIGGER_CONFIG_0,
	387	trigger_config[0]) != SR_OK)
	388	return SR_ERR;
	389
	390	if (send_longcommand(serial, CMD_SET_TRIGGER_MASK_1,
	391	reverse32(devc->trigger_mask[1])) != SR_OK)
	392	return SR_ERR;
	393	if (send_longcommand(serial, CMD_SET_TRIGGER_VALUE_1,
	394	reverse32(devc->trigger_value[1])) != SR_OK)
	395	return SR_ERR;
	396	if (send_longcommand(serial, CMD_SET_TRIGGER_CONFIG_1,
	397	trigger_config[1]) != SR_OK)
	398	return SR_ERR;
	399
	400	if (send_longcommand(serial, CMD_SET_TRIGGER_MASK_2,
	401	reverse32(devc->trigger_mask[2])) != SR_OK)
	402	return SR_ERR;
	403	if (send_longcommand(serial, CMD_SET_TRIGGER_VALUE_2,
	404	reverse32(devc->trigger_value[2])) != SR_OK)
	405	return SR_ERR;
	406	if (send_longcommand(serial, CMD_SET_TRIGGER_CONFIG_2,
	407	trigger_config[2]) != SR_OK)
	408	return SR_ERR;
	409
	410	if (send_longcommand(serial, CMD_SET_TRIGGER_MASK_3,
	411	reverse32(devc->trigger_mask[3])) != SR_OK)
	412	return SR_ERR;
	413	if (send_longcommand(serial, CMD_SET_TRIGGER_VALUE_3,
	414	reverse32(devc->trigger_value[3])) != SR_OK)
	415	return SR_ERR;
	416	if (send_longcommand(serial, CMD_SET_TRIGGER_CONFIG_3,
	417	trigger_config[3]) != SR_OK)
	418	return SR_ERR;
	419	} else {
	420	if (send_longcommand(serial, CMD_SET_TRIGGER_MASK_0,
	421	devc->trigger_mask[0]) != SR_OK)
	422	return SR_ERR;
	423	if (send_longcommand(serial, CMD_SET_TRIGGER_VALUE_0,
	424	devc->trigger_value[0]) != SR_OK)
	425	return SR_ERR;
	426	if (send_longcommand(serial, CMD_SET_TRIGGER_CONFIG_0,
	427	0x00000008) != SR_OK)
	428	return SR_ERR;
	429	delaycount = readcount;
	430	}
	431
	432	sr_info("Setting samplerate to %" PRIu64 "Hz (divider %u, "
	433	"demux %s)", devc->cur_samplerate, devc->cur_samplerate_divider,
	434	devc->flag_reg & FLAG_DEMUX ? "on" : "off");
	435	if (send_longcommand(serial, CMD_SET_DIVIDER,
	436	reverse32(devc->cur_samplerate_divider)) != SR_OK)
	437	return SR_ERR;
	438
	439	/* Send sample limit and pre/post-trigger capture ratio. */
	440	data = ((readcount - 1) & 0xffff) << 16;
	441	data \|= (delaycount - 1) & 0xffff;
	442	if (send_longcommand(serial, CMD_CAPTURE_SIZE, reverse16(data)) != SR_OK)
	443	return SR_ERR;
	444
	445	/* The flag register wants them here, and 1 means "disable channel". */
	446	devc->flag_reg \|= ~(changrp_mask << 2) & 0x3c;
	447	devc->flag_reg \|= FLAG_FILTER;
	448	devc->rle_count = 0;
	449	data = (devc->flag_reg << 24) \| ((devc->flag_reg << 8) & 0xff0000);
	450	if (send_longcommand(serial, CMD_SET_FLAGS, data) != SR_OK)
	451	return SR_ERR;
	452
	453	/* Start acquisition on the device. */
	454	if (send_shortcommand(serial, CMD_RUN) != SR_OK)
	455	return SR_ERR;
	456
	457	/* Reset all operational states. */
	458	devc->num_transfers = devc->num_samples = devc->num_bytes = 0;
	459
	460	/* Send header packet to the session bus. */
	461	std_session_send_df_header(cb_data, LOG_PREFIX);
	462
	463	sr_source_add(serial->fd, G_IO_IN, -1, ols_receive_data, cb_data);
	464
	465	return SR_OK;
	466	}
	467
	468	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	469	{
	470	(void)cb_data;
	471
	472	abort_acquisition(sdi);
	473
	474	return SR_OK;
	475	}
	476
	477	SR_PRIV struct sr_dev_driver ols_driver_info = {
	478	.name = "ols",
	479	.longname = "Openbench Logic Sniffer",
	480	.api_version = 1,
	481	.init = init,
	482	.cleanup = cleanup,
	483	.scan = scan,
	484	.dev_list = dev_list,
	485	.dev_clear = dev_clear,
	486	.config_get = config_get,
	487	.config_set = config_set,
	488	.config_list = config_list,
	489	.dev_open = dev_open,
	490	.dev_close = dev_close,
	491	.dev_acquisition_start = dev_acquisition_start,
	492	.dev_acquisition_stop = dev_acquisition_stop,
	493	.priv = NULL,
	494	};