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

/*
 * This file is part of the sigrok project.
 *
 * Copyright (C) 2010-2012 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 int hwopts[] = {
	SR_CONF_CONN,
	SR_CONF_SERIALCOMM,
	0,
};

static const int hwcaps[] = {
	SR_CONF_LOGIC_ANALYZER,
	SR_CONF_SAMPLERATE,
	SR_CONF_CAPTURE_RATIO,
	SR_CONF_LIMIT_SAMPLES,
	SR_CONF_RLE,
	0,
};

/* 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 struct sr_samplerates samplerates = {
	.low  = SR_HZ(10),
	.high = SR_MHZ(200),
	.step = SR_HZ(1),
	.list = NULL,
};

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

static int hw_init(struct sr_context *sr_ctx)
{
	return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN);
}

static GSList *hw_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];

	(void)options;

	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 = src->value;
			break;
		case SR_CONF_SERIALCOMM:
			serialcomm = src->value;
			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. */
		sdi = sr_dev_inst_new(0, SR_ST_INACTIVE,
				"Sump", "Logic Analyzer", "v1.0");
		sdi->driver = di;
		devc = ols_dev_new();
		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);
		}
		sdi->priv = devc;
	}
	devc->serial = serial;
	drvc->instances = g_slist_append(drvc->instances, sdi);
	devices = g_slist_append(devices, sdi);

	serial_close(serial);

	return devices;
}

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

static int hw_dev_open(struct sr_dev_inst *sdi)
{
	struct dev_context *devc;

	devc = sdi->priv;

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

	sdi->status = SR_ST_ACTIVE;

	return SR_OK;
}

static int hw_dev_close(struct sr_dev_inst *sdi)
{
	struct dev_context *devc;

	devc = sdi->priv;

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

	return SR_OK;
}

static int hw_cleanup(void)
{
	GSList *l;
	struct sr_dev_inst *sdi;
	struct drv_context *drvc;
	struct dev_context *devc;
	int ret = SR_OK;

	if (!(drvc = di->priv))
		return SR_OK;

	/* Properly close and free all devices. */
	for (l = drvc->instances; l; l = l->next) {
		if (!(sdi = l->data)) {
			/* Log error, but continue cleaning up the rest. */
			sr_err("%s: sdi was NULL, continuing", __func__);
			ret = SR_ERR_BUG;
			continue;
		}
		if (!(devc = sdi->priv)) {
			/* Log error, but continue cleaning up the rest. */
			sr_err("%s: sdi->priv was NULL, continuing", __func__);
			ret = SR_ERR_BUG;
			continue;
		}
		hw_dev_close(sdi);
		sr_serial_dev_inst_free(devc->serial);
		sr_dev_inst_free(sdi);
	}
	g_slist_free(drvc->instances);
	drvc->instances = NULL;

	return ret;
}

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

	switch (id) {
	case SR_CONF_SAMPLERATE:
		if (sdi) {
			devc = sdi->priv;
			*data = &devc->cur_samplerate;
		} else
			return SR_ERR;
		break;
	default:
		return SR_ERR_ARG;
	}

	return SR_OK;
}

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

	devc = sdi->priv;

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

	switch (id) {
	case SR_CONF_SAMPLERATE:
		ret = ols_set_samplerate(sdi, *(const uint64_t *)value,
					 &samplerates);
		break;
	case SR_CONF_LIMIT_SAMPLES:
		tmp_u64 = value;
		if (*tmp_u64 < MIN_NUM_SAMPLES)
			return SR_ERR;
		if (*tmp_u64 > devc->max_samples)
			sr_err("Sample limit exceeds hardware maximum.");
		devc->limit_samples = *tmp_u64;
		sr_info("Sample limit is %" PRIu64 ".", devc->limit_samples);
		ret = SR_OK;
		break;
	case SR_CONF_CAPTURE_RATIO:
		devc->capture_ratio = *(const uint64_t *)value;
		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 (GPOINTER_TO_INT(value)) {
			sr_info("Enabling RLE.");
			devc->flag_reg |= FLAG_RLE;
		}
		ret = SR_OK;
		break;
	default:
		ret = SR_ERR;
	}

	return ret;
}

static int config_list(int key, const void **data, const struct sr_dev_inst *sdi)
{

	(void)sdi;

	switch (key) {
	case SR_CONF_SCAN_OPTIONS:
		*data = hwopts;
		break;
	case SR_CONF_DEVICE_OPTIONS:
		*data = hwcaps;
		break;
	case SR_CONF_SAMPLERATE:
		*data = &samplerates;
		break;
	case SR_CONF_TRIGGER_TYPE:
		*data = (char *)TRIGGER_TYPE;
		break;
	default:
		return SR_ERR_ARG;
	}

	return SR_OK;
}

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

	devc = sdi->priv;

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

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

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

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

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

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

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

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

	return SR_OK;
}

/* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
	/* Avoid compiler warnings. */
	(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 = hw_init,
	.cleanup = hw_cleanup,
	.scan = hw_scan,
	.dev_list = hw_dev_list,
	.dev_clear = hw_cleanup,
	.config_get = config_get,
	.config_set = config_set,
	.config_list = config_list,
	.dev_open = hw_dev_open,
	.dev_close = hw_dev_close,
	.dev_acquisition_start = hw_dev_acquisition_start,
	.dev_acquisition_stop = hw_dev_acquisition_stop,
	.priv = NULL,
};
Commit	Line	Data
	1	/*
	2	* This file is part of the sigrok project.
	3	*
	4	* Copyright (C) 2010-2012 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 int hwopts[] = {
	25	SR_CONF_CONN,
	26	SR_CONF_SERIALCOMM,
	27	0,
	28	};
	29
	30	static const int hwcaps[] = {
	31	SR_CONF_LOGIC_ANALYZER,
	32	SR_CONF_SAMPLERATE,
	33	SR_CONF_CAPTURE_RATIO,
	34	SR_CONF_LIMIT_SAMPLES,
	35	SR_CONF_RLE,
	36	0,
	37	};
	38
	39	/* Probes are numbered 0-31 (on the PCB silkscreen). */
	40	SR_PRIV const char *ols_probe_names[NUM_PROBES + 1] = {
	41	"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
	42	"13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23",
	43	"24", "25", "26", "27", "28", "29", "30", "31",
	44	NULL,
	45	};
	46
	47	/* Default supported samplerates, can be overridden by device metadata. */
	48	static const struct sr_samplerates samplerates = {
	49	.low = SR_HZ(10),
	50	.high = SR_MHZ(200),
	51	.step = SR_HZ(1),
	52	.list = NULL,
	53	};
	54
	55	SR_PRIV struct sr_dev_driver ols_driver_info;
	56	static struct sr_dev_driver *di = &ols_driver_info;
	57
	58	static int hw_init(struct sr_context *sr_ctx)
	59	{
	60	return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN);
	61	}
	62
	63	static GSList hw_scan(GSList options)
	64	{
	65	struct sr_config *src;
	66	struct sr_dev_inst *sdi;
	67	struct drv_context *drvc;
	68	struct dev_context *devc;
	69	struct sr_probe *probe;
	70	struct sr_serial_dev_inst *serial;
	71	GPollFD probefd;
	72	GSList l, devices;
	73	int ret, i;
	74	const char conn, serialcomm;
	75	char buf[8];
	76
	77	(void)options;
	78
	79	drvc = di->priv;
	80
	81	devices = NULL;
	82
	83	conn = serialcomm = NULL;
	84	for (l = options; l; l = l->next) {
	85	src = l->data;
	86	switch (src->key) {
	87	case SR_CONF_CONN:
	88	conn = src->value;
	89	break;
	90	case SR_CONF_SERIALCOMM:
	91	serialcomm = src->value;
	92	break;
	93	}
	94	}
	95	if (!conn)
	96	return NULL;
	97
	98	if (serialcomm == NULL)
	99	serialcomm = SERIALCOMM;
	100
	101	if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
	102	return NULL;
	103
	104	/* The discovery procedure is like this: first send the Reset
	105	* command (0x00) 5 times, since the device could be anywhere
	106	* in a 5-byte command. Then send the ID command (0x02).
	107	* If the device responds with 4 bytes ("OLS1" or "SLA1"), we
	108	* have a match.
	109	*/
	110	sr_info("Probing %s.", conn);
	111	if (serial_open(serial, SERIAL_RDWR \| SERIAL_NONBLOCK) != SR_OK)
	112	return NULL;
	113
	114	ret = SR_OK;
	115	for (i = 0; i < 5; i++) {
	116	if ((ret = send_shortcommand(serial, CMD_RESET)) != SR_OK) {
	117	sr_err("Port %s is not writable.", conn);
	118	break;
	119	}
	120	}
	121	if (ret != SR_OK) {
	122	serial_close(serial);
	123	sr_err("Could not use port %s. Quitting.", conn);
	124	return NULL;
	125	}
	126	send_shortcommand(serial, CMD_ID);
	127
	128	/* Wait 10ms for a response. */
	129	g_usleep(10000);
	130
	131	probefd.fd = serial->fd;
	132	probefd.events = G_IO_IN;
	133	g_poll(&probefd, 1, 1);
	134
	135	if (probefd.revents != G_IO_IN)
	136	return NULL;
	137	if (serial_read(serial, buf, 4) != 4)
	138	return NULL;
	139	if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4))
	140	return NULL;
	141
	142	/* Definitely using the OLS protocol, check if it supports
	143	* the metadata command.
	144	*/
	145	send_shortcommand(serial, CMD_METADATA);
	146	if (g_poll(&probefd, 1, 10) > 0) {
	147	/* Got metadata. */
	148	sdi = get_metadata(serial);
	149	sdi->index = 0;
	150	devc = sdi->priv;
	151	} else {
	152	/* Not an OLS -- some other board that uses the sump protocol. */
	153	sdi = sr_dev_inst_new(0, SR_ST_INACTIVE,
	154	"Sump", "Logic Analyzer", "v1.0");
	155	sdi->driver = di;
	156	devc = ols_dev_new();
	157	for (i = 0; i < 32; i++) {
	158	if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE,
	159	ols_probe_names[i])))
	160	return 0;
	161	sdi->probes = g_slist_append(sdi->probes, probe);
	162	}
	163	sdi->priv = devc;
	164	}
	165	devc->serial = serial;
	166	drvc->instances = g_slist_append(drvc->instances, sdi);
	167	devices = g_slist_append(devices, sdi);
	168
	169	serial_close(serial);
	170
	171	return devices;
	172	}
	173
	174	static GSList *hw_dev_list(void)
	175	{
	176	return ((struct drv_context *)(di->priv))->instances;
	177	}
	178
	179	static int hw_dev_open(struct sr_dev_inst *sdi)
	180	{
	181	struct dev_context *devc;
	182
	183	devc = sdi->priv;
	184
	185	if (serial_open(devc->serial, SERIAL_RDWR) != SR_OK)
	186	return SR_ERR;
	187
	188	sdi->status = SR_ST_ACTIVE;
	189
	190	return SR_OK;
	191	}
	192
	193	static int hw_dev_close(struct sr_dev_inst *sdi)
	194	{
	195	struct dev_context *devc;
	196
	197	devc = sdi->priv;
	198
	199	if (devc->serial && devc->serial->fd != -1) {
	200	serial_close(devc->serial);
	201	sdi->status = SR_ST_INACTIVE;
	202	}
	203
	204	return SR_OK;
	205	}
	206
	207	static int hw_cleanup(void)
	208	{
	209	GSList *l;
	210	struct sr_dev_inst *sdi;
	211	struct drv_context *drvc;
	212	struct dev_context *devc;
	213	int ret = SR_OK;
	214
	215	if (!(drvc = di->priv))
	216	return SR_OK;
	217
	218	/* Properly close and free all devices. */
	219	for (l = drvc->instances; l; l = l->next) {
	220	if (!(sdi = l->data)) {
	221	/* Log error, but continue cleaning up the rest. */
	222	sr_err("%s: sdi was NULL, continuing", __func__);
	223	ret = SR_ERR_BUG;
	224	continue;
	225	}
	226	if (!(devc = sdi->priv)) {
	227	/* Log error, but continue cleaning up the rest. */
	228	sr_err("%s: sdi->priv was NULL, continuing", __func__);
	229	ret = SR_ERR_BUG;
	230	continue;
	231	}
	232	hw_dev_close(sdi);
	233	sr_serial_dev_inst_free(devc->serial);
	234	sr_dev_inst_free(sdi);
	235	}
	236	g_slist_free(drvc->instances);
	237	drvc->instances = NULL;
	238
	239	return ret;
	240	}
	241
	242	static int config_get(int id, const void *data, const struct sr_dev_inst sdi)
	243	{
	244	struct dev_context *devc;
	245
	246	switch (id) {
	247	case SR_CONF_SAMPLERATE:
	248	if (sdi) {
	249	devc = sdi->priv;
	250	*data = &devc->cur_samplerate;
	251	} else
	252	return SR_ERR;
	253	break;
	254	default:
	255	return SR_ERR_ARG;
	256	}
	257
	258	return SR_OK;
	259	}
	260
	261	static int config_set(int id, const void value, const struct sr_dev_inst sdi)
	262	{
	263	struct dev_context *devc;
	264	int ret;
	265	const uint64_t *tmp_u64;
	266
	267	devc = sdi->priv;
	268
	269	if (sdi->status != SR_ST_ACTIVE)
	270	return SR_ERR;
	271
	272	switch (id) {
	273	case SR_CONF_SAMPLERATE:
	274	ret = ols_set_samplerate(sdi, (const uint64_t )value,
	275	&samplerates);
	276	break;
	277	case SR_CONF_LIMIT_SAMPLES:
	278	tmp_u64 = value;
	279	if (*tmp_u64 < MIN_NUM_SAMPLES)
	280	return SR_ERR;
	281	if (*tmp_u64 > devc->max_samples)
	282	sr_err("Sample limit exceeds hardware maximum.");
	283	devc->limit_samples = *tmp_u64;
	284	sr_info("Sample limit is %" PRIu64 ".", devc->limit_samples);
	285	ret = SR_OK;
	286	break;
	287	case SR_CONF_CAPTURE_RATIO:
	288	devc->capture_ratio = (const uint64_t )value;
	289	if (devc->capture_ratio < 0 \|\| devc->capture_ratio > 100) {
	290	devc->capture_ratio = 0;
	291	ret = SR_ERR;
	292	} else
	293	ret = SR_OK;
	294	break;
	295	case SR_CONF_RLE:
	296	if (GPOINTER_TO_INT(value)) {
	297	sr_info("Enabling RLE.");
	298	devc->flag_reg \|= FLAG_RLE;
	299	}
	300	ret = SR_OK;
	301	break;
	302	default:
	303	ret = SR_ERR;
	304	}
	305
	306	return ret;
	307	}
	308
	309	static int config_list(int key, const void *data, const struct sr_dev_inst sdi)
	310	{
	311
	312	(void)sdi;
	313
	314	switch (key) {
	315	case SR_CONF_SCAN_OPTIONS:
	316	*data = hwopts;
	317	break;
	318	case SR_CONF_DEVICE_OPTIONS:
	319	*data = hwcaps;
	320	break;
	321	case SR_CONF_SAMPLERATE:
	322	*data = &samplerates;
	323	break;
	324	case SR_CONF_TRIGGER_TYPE:
	325	data = (char )TRIGGER_TYPE;
	326	break;
	327	default:
	328	return SR_ERR_ARG;
	329	}
	330
	331	return SR_OK;
	332	}
	333
	334	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
	335	void *cb_data)
	336	{
	337	struct dev_context *devc;
	338	uint32_t trigger_config[4];
	339	uint32_t data;
	340	uint16_t readcount, delaycount;
	341	uint8_t changrp_mask;
	342	int num_channels;
	343	int i;
	344
	345	devc = sdi->priv;
	346
	347	if (sdi->status != SR_ST_ACTIVE)
	348	return SR_ERR;
	349
	350	if (ols_configure_probes(sdi) != SR_OK) {
	351	sr_err("Failed to configure probes.");
	352	return SR_ERR;
	353	}
	354
	355	/*
	356	* Enable/disable channel groups in the flag register according to the
	357	* probe mask. Calculate this here, because num_channels is needed
	358	* to limit readcount.
	359	*/
	360	changrp_mask = 0;
	361	num_channels = 0;
	362	for (i = 0; i < 4; i++) {
	363	if (devc->probe_mask & (0xff << (i * 8))) {
	364	changrp_mask \|= (1 << i);
	365	num_channels++;
	366	}
	367	}
	368
	369	/*
	370	* Limit readcount to prevent reading past the end of the hardware
	371	* buffer.
	372	*/
	373	readcount = MIN(devc->max_samples / num_channels, devc->limit_samples) / 4;
	374
	375	memset(trigger_config, 0, 16);
	376	trigger_config[devc->num_stages - 1] \|= 0x08;
	377	if (devc->trigger_mask[0]) {
	378	delaycount = readcount * (1 - devc->capture_ratio / 100.0);
	379	devc->trigger_at = (readcount - delaycount) * 4 - devc->num_stages;
	380
	381	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_MASK_0,
	382	reverse32(devc->trigger_mask[0])) != SR_OK)
	383	return SR_ERR;
	384	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_VALUE_0,
	385	reverse32(devc->trigger_value[0])) != SR_OK)
	386	return SR_ERR;
	387	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_CONFIG_0,
	388	trigger_config[0]) != SR_OK)
	389	return SR_ERR;
	390
	391	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_MASK_1,
	392	reverse32(devc->trigger_mask[1])) != SR_OK)
	393	return SR_ERR;
	394	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_VALUE_1,
	395	reverse32(devc->trigger_value[1])) != SR_OK)
	396	return SR_ERR;
	397	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_CONFIG_1,
	398	trigger_config[1]) != SR_OK)
	399	return SR_ERR;
	400
	401	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_MASK_2,
	402	reverse32(devc->trigger_mask[2])) != SR_OK)
	403	return SR_ERR;
	404	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_VALUE_2,
	405	reverse32(devc->trigger_value[2])) != SR_OK)
	406	return SR_ERR;
	407	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_CONFIG_2,
	408	trigger_config[2]) != SR_OK)
	409	return SR_ERR;
	410
	411	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_MASK_3,
	412	reverse32(devc->trigger_mask[3])) != SR_OK)
	413	return SR_ERR;
	414	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_VALUE_3,
	415	reverse32(devc->trigger_value[3])) != SR_OK)
	416	return SR_ERR;
	417	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_CONFIG_3,
	418	trigger_config[3]) != SR_OK)
	419	return SR_ERR;
	420	} else {
	421	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_MASK_0,
	422	devc->trigger_mask[0]) != SR_OK)
	423	return SR_ERR;
	424	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_VALUE_0,
	425	devc->trigger_value[0]) != SR_OK)
	426	return SR_ERR;
	427	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_CONFIG_0,
	428	0x00000008) != SR_OK)
	429	return SR_ERR;
	430	delaycount = readcount;
	431	}
	432
	433	sr_info("Setting samplerate to %" PRIu64 "Hz (divider %u, "
	434	"demux %s)", devc->cur_samplerate, devc->cur_samplerate_divider,
	435	devc->flag_reg & FLAG_DEMUX ? "on" : "off");
	436	if (send_longcommand(devc->serial, CMD_SET_DIVIDER,
	437	reverse32(devc->cur_samplerate_divider)) != SR_OK)
	438	return SR_ERR;
	439
	440	/* Send sample limit and pre/post-trigger capture ratio. */
	441	data = ((readcount - 1) & 0xffff) << 16;
	442	data \|= (delaycount - 1) & 0xffff;
	443	if (send_longcommand(devc->serial, CMD_CAPTURE_SIZE, reverse16(data)) != SR_OK)
	444	return SR_ERR;
	445
	446	/* The flag register wants them here, and 1 means "disable channel". */
	447	devc->flag_reg \|= ~(changrp_mask << 2) & 0x3c;
	448	devc->flag_reg \|= FLAG_FILTER;
	449	devc->rle_count = 0;
	450	data = (devc->flag_reg << 24) \| ((devc->flag_reg << 8) & 0xff0000);
	451	if (send_longcommand(devc->serial, CMD_SET_FLAGS, data) != SR_OK)
	452	return SR_ERR;
	453
	454	/* Start acquisition on the device. */
	455	if (send_shortcommand(devc->serial, CMD_RUN) != SR_OK)
	456	return SR_ERR;
	457
	458	/* Send header packet to the session bus. */
	459	std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN);
	460
	461	sr_source_add(devc->serial->fd, G_IO_IN, -1, ols_receive_data,
	462	cb_data);
	463
	464	return SR_OK;
	465	}
	466
	467	/* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
	468	static int hw_dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	469	{
	470	/* Avoid compiler warnings. */
	471	(void)cb_data;
	472
	473	abort_acquisition(sdi);
	474
	475	return SR_OK;
	476	}
	477
	478	SR_PRIV struct sr_dev_driver ols_driver_info = {
	479	.name = "ols",
	480	.longname = "Openbench Logic Sniffer",
	481	.api_version = 1,
	482	.init = hw_init,
	483	.cleanup = hw_cleanup,
	484	.scan = hw_scan,
	485	.dev_list = hw_dev_list,
	486	.dev_clear = hw_cleanup,
	487	.config_get = config_get,
	488	.config_set = config_set,
	489	.config_list = config_list,
	490	.dev_open = hw_dev_open,
	491	.dev_close = hw_dev_close,
	492	.dev_acquisition_start = hw_dev_acquisition_start,
	493	.dev_acquisition_stop = hw_dev_acquisition_stop,
	494	.priv = NULL,
	495	};