[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 = {
	SR_HZ(10),
	SR_MHZ(200),
	SR_HZ(1),
	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)
{
	struct drv_context *drvc;

	if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
		sr_err("Driver context malloc failed.");
		return SR_ERR_MALLOC;
	}
	drvc->sr_ctx = sr_ctx;
	di->priv = drvc;

	return SR_OK;
}

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)
{
	struct drv_context *drvc;

	drvc = di->priv;

	return drvc->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 hw_info_get(int info_id, const void **data,
       const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;

	switch (info_id) {
	case SR_DI_HWOPTS:
		*data = hwopts;
		break;
	case SR_DI_HWCAPS:
		*data = hwcaps;
		break;
	case SR_DI_SAMPLERATES:
		*data = &samplerates;
		break;
	case SR_DI_TRIGGER_TYPES:
		*data = (char *)TRIGGER_TYPES;
		break;
	case SR_DI_CUR_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 hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
		const void *value)
{
	struct dev_context *devc;
	int ret;
	const uint64_t *tmp_u64;

	devc = sdi->priv;

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

	switch (hwcap) {
	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 hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
		void *cb_data)
{
	struct sr_datafeed_packet *packet;
	struct sr_datafeed_header *header;
	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;

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

	if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
		sr_err("Datafeed packet malloc failed.");
		return SR_ERR_MALLOC;
	}

	if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
		sr_err("Datafeed header malloc failed.");
		g_free(packet);
		return SR_ERR_MALLOC;
	}

	/* Send header packet to the session bus. */
	packet->type = SR_DF_HEADER;
	packet->payload = (unsigned char *)header;
	header->feed_version = 1;
	gettimeofday(&header->starttime, NULL);
	sr_session_send(cb_data, packet);

	g_free(header);
	g_free(packet);

	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,
	.dev_open = hw_dev_open,
	.dev_close = hw_dev_close,
	.info_get = hw_info_get,
	.dev_config_set = hw_dev_config_set,
	.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	SR_HZ(10),
	50	SR_MHZ(200),
	51	SR_HZ(1),
	52	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	struct drv_context *drvc;
	61
	62	if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
	63	sr_err("Driver context malloc failed.");
	64	return SR_ERR_MALLOC;
	65	}
	66	drvc->sr_ctx = sr_ctx;
	67	di->priv = drvc;
	68
	69	return SR_OK;
	70	}
	71
	72	static GSList hw_scan(GSList options)
	73	{
	74	struct sr_config *src;
	75	struct sr_dev_inst *sdi;
	76	struct drv_context *drvc;
	77	struct dev_context *devc;
	78	struct sr_probe *probe;
	79	struct sr_serial_dev_inst *serial;
	80	GPollFD probefd;
	81	GSList l, devices;
	82	int ret, i;
	83	const char conn, serialcomm;
	84	char buf[8];
	85
	86	(void)options;
	87	drvc = di->priv;
	88	devices = NULL;
	89
	90	conn = serialcomm = NULL;
	91	for (l = options; l; l = l->next) {
	92	src = l->data;
	93	switch (src->key) {
	94	case SR_CONF_CONN:
	95	conn = src->value;
	96	break;
	97	case SR_CONF_SERIALCOMM:
	98	serialcomm = src->value;
	99	break;
	100	}
	101	}
	102	if (!conn)
	103	return NULL;
	104
	105	if (serialcomm == NULL)
	106	serialcomm = SERIALCOMM;
	107
	108	if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
	109	return NULL;
	110
	111	/* The discovery procedure is like this: first send the Reset
	112	* command (0x00) 5 times, since the device could be anywhere
	113	* in a 5-byte command. Then send the ID command (0x02).
	114	* If the device responds with 4 bytes ("OLS1" or "SLA1"), we
	115	* have a match.
	116	*/
	117	sr_info("Probing %s.", conn);
	118	if (serial_open(serial, SERIAL_RDWR \| SERIAL_NONBLOCK) != SR_OK)
	119	return NULL;
	120
	121	ret = SR_OK;
	122	for (i = 0; i < 5; i++) {
	123	if ((ret = send_shortcommand(serial, CMD_RESET)) != SR_OK) {
	124	sr_err("Port %s is not writable.", conn);
	125	break;
	126	}
	127	}
	128	if (ret != SR_OK) {
	129	serial_close(serial);
	130	sr_err("Could not use port %s. Quitting.", conn);
	131	return NULL;
	132	}
	133	send_shortcommand(serial, CMD_ID);
	134
	135	/* Wait 10ms for a response. */
	136	g_usleep(10000);
	137
	138	probefd.fd = serial->fd;
	139	probefd.events = G_IO_IN;
	140	g_poll(&probefd, 1, 1);
	141
	142	if (probefd.revents != G_IO_IN)
	143	return NULL;
	144	if (serial_read(serial, buf, 4) != 4)
	145	return NULL;
	146	if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4))
	147	return NULL;
	148
	149	/* Definitely using the OLS protocol, check if it supports
	150	* the metadata command.
	151	*/
	152	send_shortcommand(serial, CMD_METADATA);
	153	if (g_poll(&probefd, 1, 10) > 0) {
	154	/* Got metadata. */
	155	sdi = get_metadata(serial);
	156	sdi->index = 0;
	157	devc = sdi->priv;
	158	} else {
	159	/* Not an OLS -- some other board that uses the sump protocol. */
	160	sdi = sr_dev_inst_new(0, SR_ST_INACTIVE,
	161	"Sump", "Logic Analyzer", "v1.0");
	162	sdi->driver = di;
	163	devc = ols_dev_new();
	164	for (i = 0; i < 32; i++) {
	165	if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE,
	166	ols_probe_names[i])))
	167	return 0;
	168	sdi->probes = g_slist_append(sdi->probes, probe);
	169	}
	170	sdi->priv = devc;
	171	}
	172	devc->serial = serial;
	173	drvc->instances = g_slist_append(drvc->instances, sdi);
	174	devices = g_slist_append(devices, sdi);
	175
	176	serial_close(serial);
	177
	178	return devices;
	179	}
	180
	181	static GSList *hw_dev_list(void)
	182	{
	183	struct drv_context *drvc;
	184
	185	drvc = di->priv;
	186
	187	return drvc->instances;
	188	}
	189
	190	static int hw_dev_open(struct sr_dev_inst *sdi)
	191	{
	192	struct dev_context *devc;
	193
	194	devc = sdi->priv;
	195
	196	if (serial_open(devc->serial, SERIAL_RDWR) != SR_OK)
	197	return SR_ERR;
	198
	199	sdi->status = SR_ST_ACTIVE;
	200
	201	return SR_OK;
	202	}
	203
	204	static int hw_dev_close(struct sr_dev_inst *sdi)
	205	{
	206	struct dev_context *devc;
	207
	208	devc = sdi->priv;
	209
	210	if (devc->serial && devc->serial->fd != -1) {
	211	serial_close(devc->serial);
	212	sdi->status = SR_ST_INACTIVE;
	213	}
	214
	215	return SR_OK;
	216	}
	217
	218	static int hw_cleanup(void)
	219	{
	220	GSList *l;
	221	struct sr_dev_inst *sdi;
	222	struct drv_context *drvc;
	223	struct dev_context *devc;
	224	int ret = SR_OK;
	225
	226	if (!(drvc = di->priv))
	227	return SR_OK;
	228
	229	/* Properly close and free all devices. */
	230	for (l = drvc->instances; l; l = l->next) {
	231	if (!(sdi = l->data)) {
	232	/* Log error, but continue cleaning up the rest. */
	233	sr_err("%s: sdi was NULL, continuing", __func__);
	234	ret = SR_ERR_BUG;
	235	continue;
	236	}
	237	if (!(devc = sdi->priv)) {
	238	/* Log error, but continue cleaning up the rest. */
	239	sr_err("%s: sdi->priv was NULL, continuing", __func__);
	240	ret = SR_ERR_BUG;
	241	continue;
	242	}
	243	hw_dev_close(sdi);
	244	sr_serial_dev_inst_free(devc->serial);
	245	sr_dev_inst_free(sdi);
	246	}
	247	g_slist_free(drvc->instances);
	248	drvc->instances = NULL;
	249
	250	return ret;
	251	}
	252
	253	static int hw_info_get(int info_id, const void **data,
	254	const struct sr_dev_inst *sdi)
	255	{
	256	struct dev_context *devc;
	257
	258	switch (info_id) {
	259	case SR_DI_HWOPTS:
	260	*data = hwopts;
	261	break;
	262	case SR_DI_HWCAPS:
	263	*data = hwcaps;
	264	break;
	265	case SR_DI_SAMPLERATES:
	266	*data = &samplerates;
	267	break;
	268	case SR_DI_TRIGGER_TYPES:
	269	data = (char )TRIGGER_TYPES;
	270	break;
	271	case SR_DI_CUR_SAMPLERATE:
	272	if (sdi) {
	273	devc = sdi->priv;
	274	*data = &devc->cur_samplerate;
	275	} else
	276	return SR_ERR;
	277	break;
	278	default:
	279	return SR_ERR_ARG;
	280	}
	281
	282	return SR_OK;
	283	}
	284
	285	static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
	286	const void *value)
	287	{
	288	struct dev_context *devc;
	289	int ret;
	290	const uint64_t *tmp_u64;
	291
	292	devc = sdi->priv;
	293
	294	if (sdi->status != SR_ST_ACTIVE)
	295	return SR_ERR;
	296
	297	switch (hwcap) {
	298	case SR_CONF_SAMPLERATE:
	299	ret = ols_set_samplerate(sdi, (const uint64_t )value,
	300	&samplerates);
	301	break;
	302	case SR_CONF_LIMIT_SAMPLES:
	303	tmp_u64 = value;
	304	if (*tmp_u64 < MIN_NUM_SAMPLES)
	305	return SR_ERR;
	306	if (*tmp_u64 > devc->max_samples)
	307	sr_err("Sample limit exceeds hardware maximum.");
	308	devc->limit_samples = *tmp_u64;
	309	sr_info("Sample limit is %" PRIu64 ".", devc->limit_samples);
	310	ret = SR_OK;
	311	break;
	312	case SR_CONF_CAPTURE_RATIO:
	313	devc->capture_ratio = (const uint64_t )value;
	314	if (devc->capture_ratio < 0 \|\| devc->capture_ratio > 100) {
	315	devc->capture_ratio = 0;
	316	ret = SR_ERR;
	317	} else
	318	ret = SR_OK;
	319	break;
	320	case SR_CONF_RLE:
	321	if (GPOINTER_TO_INT(value)) {
	322	sr_info("Enabling RLE.");
	323	devc->flag_reg \|= FLAG_RLE;
	324	}
	325	ret = SR_OK;
	326	break;
	327	default:
	328	ret = SR_ERR;
	329	}
	330
	331	return ret;
	332	}
	333
	334	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
	335	void *cb_data)
	336	{
	337	struct sr_datafeed_packet *packet;
	338	struct sr_datafeed_header *header;
	339	struct dev_context *devc;
	340	uint32_t trigger_config[4];
	341	uint32_t data;
	342	uint16_t readcount, delaycount;
	343	uint8_t changrp_mask;
	344	int num_channels;
	345	int i;
	346
	347	devc = sdi->priv;
	348
	349	if (sdi->status != SR_ST_ACTIVE)
	350	return SR_ERR;
	351
	352	if (ols_configure_probes(sdi) != SR_OK) {
	353	sr_err("Failed to configure probes.");
	354	return SR_ERR;
	355	}
	356
	357	/*
	358	* Enable/disable channel groups in the flag register according to the
	359	* probe mask. Calculate this here, because num_channels is needed
	360	* to limit readcount.
	361	*/
	362	changrp_mask = 0;
	363	num_channels = 0;
	364	for (i = 0; i < 4; i++) {
	365	if (devc->probe_mask & (0xff << (i * 8))) {
	366	changrp_mask \|= (1 << i);
	367	num_channels++;
	368	}
	369	}
	370
	371	/*
	372	* Limit readcount to prevent reading past the end of the hardware
	373	* buffer.
	374	*/
	375	readcount = MIN(devc->max_samples / num_channels, devc->limit_samples) / 4;
	376
	377	memset(trigger_config, 0, 16);
	378	trigger_config[devc->num_stages - 1] \|= 0x08;
	379	if (devc->trigger_mask[0]) {
	380	delaycount = readcount * (1 - devc->capture_ratio / 100.0);
	381	devc->trigger_at = (readcount - delaycount) * 4 - devc->num_stages;
	382
	383	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_MASK_0,
	384	reverse32(devc->trigger_mask[0])) != SR_OK)
	385	return SR_ERR;
	386	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_VALUE_0,
	387	reverse32(devc->trigger_value[0])) != SR_OK)
	388	return SR_ERR;
	389	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_CONFIG_0,
	390	trigger_config[0]) != SR_OK)
	391	return SR_ERR;
	392
	393	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_MASK_1,
	394	reverse32(devc->trigger_mask[1])) != SR_OK)
	395	return SR_ERR;
	396	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_VALUE_1,
	397	reverse32(devc->trigger_value[1])) != SR_OK)
	398	return SR_ERR;
	399	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_CONFIG_1,
	400	trigger_config[1]) != SR_OK)
	401	return SR_ERR;
	402
	403	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_MASK_2,
	404	reverse32(devc->trigger_mask[2])) != SR_OK)
	405	return SR_ERR;
	406	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_VALUE_2,
	407	reverse32(devc->trigger_value[2])) != SR_OK)
	408	return SR_ERR;
	409	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_CONFIG_2,
	410	trigger_config[2]) != SR_OK)
	411	return SR_ERR;
	412
	413	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_MASK_3,
	414	reverse32(devc->trigger_mask[3])) != SR_OK)
	415	return SR_ERR;
	416	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_VALUE_3,
	417	reverse32(devc->trigger_value[3])) != SR_OK)
	418	return SR_ERR;
	419	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_CONFIG_3,
	420	trigger_config[3]) != SR_OK)
	421	return SR_ERR;
	422	} else {
	423	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_MASK_0,
	424	devc->trigger_mask[0]) != SR_OK)
	425	return SR_ERR;
	426	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_VALUE_0,
	427	devc->trigger_value[0]) != SR_OK)
	428	return SR_ERR;
	429	if (send_longcommand(devc->serial, CMD_SET_TRIGGER_CONFIG_0,
	430	0x00000008) != SR_OK)
	431	return SR_ERR;
	432	delaycount = readcount;
	433	}
	434
	435	sr_info("Setting samplerate to %" PRIu64 "Hz (divider %u, "
	436	"demux %s)", devc->cur_samplerate, devc->cur_samplerate_divider,
	437	devc->flag_reg & FLAG_DEMUX ? "on" : "off");
	438	if (send_longcommand(devc->serial, CMD_SET_DIVIDER,
	439	reverse32(devc->cur_samplerate_divider)) != SR_OK)
	440	return SR_ERR;
	441
	442	/* Send sample limit and pre/post-trigger capture ratio. */
	443	data = ((readcount - 1) & 0xffff) << 16;
	444	data \|= (delaycount - 1) & 0xffff;
	445	if (send_longcommand(devc->serial, CMD_CAPTURE_SIZE, reverse16(data)) != SR_OK)
	446	return SR_ERR;
	447
	448	/* The flag register wants them here, and 1 means "disable channel". */
	449	devc->flag_reg \|= ~(changrp_mask << 2) & 0x3c;
	450	devc->flag_reg \|= FLAG_FILTER;
	451	devc->rle_count = 0;
	452	data = (devc->flag_reg << 24) \| ((devc->flag_reg << 8) & 0xff0000);
	453	if (send_longcommand(devc->serial, CMD_SET_FLAGS, data) != SR_OK)
	454	return SR_ERR;
	455
	456	/* Start acquisition on the device. */
	457	if (send_shortcommand(devc->serial, CMD_RUN) != SR_OK)
	458	return SR_ERR;
	459
	460	sr_source_add(devc->serial->fd, G_IO_IN, -1, ols_receive_data,
	461	cb_data);
	462
	463	if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
	464	sr_err("Datafeed packet malloc failed.");
	465	return SR_ERR_MALLOC;
	466	}
	467
	468	if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
	469	sr_err("Datafeed header malloc failed.");
	470	g_free(packet);
	471	return SR_ERR_MALLOC;
	472	}
	473
	474	/* Send header packet to the session bus. */
	475	packet->type = SR_DF_HEADER;
	476	packet->payload = (unsigned char *)header;
	477	header->feed_version = 1;
	478	gettimeofday(&header->starttime, NULL);
	479	sr_session_send(cb_data, packet);
	480
	481	g_free(header);
	482	g_free(packet);
	483
	484	return SR_OK;
	485	}
	486
	487	/* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
	488	static int hw_dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	489	{
	490	/* Avoid compiler warnings. */
	491	(void)cb_data;
	492
	493	abort_acquisition(sdi);
	494
	495	return SR_OK;
	496	}
	497
	498	SR_PRIV struct sr_dev_driver ols_driver_info = {
	499	.name = "ols",
	500	.longname = "Openbench Logic Sniffer",
	501	.api_version = 1,
	502	.init = hw_init,
	503	.cleanup = hw_cleanup,
	504	.scan = hw_scan,
	505	.dev_list = hw_dev_list,
	506	.dev_clear = hw_cleanup,
	507	.dev_open = hw_dev_open,
	508	.dev_close = hw_dev_close,
	509	.info_get = hw_info_get,
	510	.dev_config_set = hw_dev_config_set,
	511	.dev_acquisition_start = hw_dev_acquisition_start,
	512	.dev_acquisition_stop = hw_dev_acquisition_stop,
	513	.priv = NULL,
	514	};