[libsigrok.git] / hardware / rigol-ds1xx2 / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2012 Martin Ling <martin-git@earth.li>
 *
 * 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 <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
#include "protocol.h"

static const int hwcaps[] = {
	SR_CONF_OSCILLOSCOPE,
	SR_CONF_LIMIT_SAMPLES,
	SR_CONF_TIMEBASE,
	SR_CONF_TRIGGER_SOURCE,
	SR_CONF_TRIGGER_SLOPE,
	SR_CONF_HORIZ_TRIGGERPOS,
	SR_CONF_VDIV,
	SR_CONF_COUPLING,
	0,
};

static const struct sr_rational timebases[] = {
	/* nanoseconds */
	{ 2, 1000000000 },
	{ 5, 1000000000 },
	{ 10, 1000000000 },
	{ 20, 1000000000 },
	{ 50, 1000000000 },
	{ 100, 1000000000 },
	{ 500, 1000000000 },
	/* microseconds */
	{ 1, 1000000 },
	{ 2, 1000000 },
	{ 5, 1000000 },
	{ 10, 1000000 },
	{ 20, 1000000 },
	{ 50, 1000000 },
	{ 100, 1000000 },
	{ 200, 1000000 },
	{ 500, 1000000 },
	/* milliseconds */
	{ 1, 1000 },
	{ 2, 1000 },
	{ 5, 1000 },
	{ 10, 1000 },
	{ 20, 1000 },
	{ 50, 1000 },
	{ 100, 1000 },
	{ 200, 1000 },
	{ 500, 1000 },
	/* seconds */
	{ 1, 1 },
	{ 2, 1 },
	{ 5, 1 },
	{ 10, 1 },
	{ 20, 1 },
	{ 50, 1 },
	{ 0, 0},
};

static const struct sr_rational vdivs[] = {
	/* millivolts */
	{ 2, 1000 },
	{ 5, 1000 },
	{ 10, 1000 },
	{ 20, 1000 },
	{ 50, 1000 },
	{ 100, 1000 },
	{ 200, 1000 },
	{ 500, 1000 },
	/* volts */
	{ 1, 1 },
	{ 2, 1 },
	{ 5, 1 },
	{ 10, 1 },
	{ 0, 0 },
};

static const char *trigger_sources[] = {
	"CH1",
	"CH2",
	"EXT",
	"AC Line",
	NULL,
};

static const char *coupling[] = {
	"AC",
	"DC",
	"GND",
	NULL,
};

static const char *supported_models[] = {
	"DS1052E",
	"DS1102E",
	"DS1052D",
	"DS1102D"
};

SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info;
static struct sr_dev_driver *di = &rigol_ds1xx2_driver_info;

/* Properly close and free all devices. */
static int clear_instances(void)
{
	struct sr_dev_inst *sdi;
	struct drv_context *drvc;
	struct dev_context *devc;
	GSList *l;

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

	for (l = drvc->instances; l; l = l->next) {
		if (!(sdi = l->data))
			continue;
		if (!(devc = sdi->priv))
			continue;

		g_free(devc->device);
		g_slist_free(devc->enabled_probes);
		close(devc->fd);

		sr_dev_inst_free(sdi);
	}

	g_slist_free(drvc->instances);
	drvc->instances = NULL;

	return SR_OK;
}

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 drv_context *drvc;
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	struct sr_probe *probe;
	GSList *devices;
	GDir *dir;
	const gchar *dev_name;
	const gchar *dev_dir = "/dev/";
	const gchar *prefix = "usbtmc";
	gchar *device;
	const gchar *idn_query = "*IDN?";
	int len, num_tokens, fd, i;
	const gchar *delimiter = ",";
	gchar **tokens;
	const char *manufacturer, *model, *version;
	int num_models;
	gboolean matched = FALSE;
	char buf[256];

	(void)options;

	drvc = di->priv;
	drvc->instances = NULL;

	devices = NULL;

	dir = g_dir_open("/sys/class/usb/", 0, NULL);

	if (dir == NULL)
		return NULL;

	while ((dev_name = g_dir_read_name(dir)) != NULL) {
		if (strncmp(dev_name, prefix, strlen(prefix))) 
			continue;

		device = g_strconcat(dev_dir, dev_name, NULL);

		fd = open(device, O_RDWR);
		len = write(fd, idn_query, strlen(idn_query));
		len = read(fd, buf, sizeof(buf));
		close(fd);
		if (len == 0) {
			g_free(device);
			return NULL;
		}

		buf[len] = 0;
		tokens = g_strsplit(buf, delimiter, 0);
		close(fd);
		sr_dbg("response: %s %d [%s]", device, len, buf);

		for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++);

		if (num_tokens < 4) {
			g_strfreev(tokens);
			g_free(device);
			return NULL;
		}

		manufacturer = tokens[0];
		model = tokens[1];
		version = tokens[3];

		if (strcmp(manufacturer, "Rigol Technologies")) {
			g_strfreev(tokens);
			g_free(device);
			return NULL;
		}

		num_models = sizeof(supported_models) / sizeof(supported_models[0]);

		for (i = 0; i < num_models; i++) {
			if (!strcmp(model, supported_models[i])) {
				matched = 1;
				break;
			}
		}

		if (!matched || !(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE,
			manufacturer, model, version))) {
			g_strfreev(tokens);
			g_free(device);
			return NULL;
		}

		g_strfreev(tokens);

		if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
			sr_err("Device context malloc failed.");
			g_free(device);
			return NULL;
		}

		devc->device = device;

		sdi->priv = devc;
		sdi->driver = di;

		for (i = 0; i < 2; i++) {
			if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE,
			    i == 0 ? "CH1" : "CH2")))
				return NULL;
			sdi->probes = g_slist_append(sdi->probes, probe);
		}

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

	g_dir_close(dir);

	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;
	int fd;

	devc = sdi->priv;

	if ((fd = open(devc->device, O_RDWR)) == -1)
		return SR_ERR;

	devc->fd = fd;

	devc->scale = 1;

	return SR_OK;
}

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

	devc = sdi->priv;

	close(devc->fd);

	return SR_OK;
}

static int hw_cleanup(void)
{
	clear_instances();

	return SR_OK;
}

static int config_set(int id, const void *value, const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	uint64_t tmp_u64;
	float tmp_float;
	struct sr_rational tmp_rat;
	int ret, i, j;
	char *channel;

	devc = sdi->priv;

	if (sdi->status != SR_ST_ACTIVE) {
		sr_err("Device inactive, can't set config options.");
		return SR_ERR;
	}

	ret = SR_OK;
	switch (id) {
	case SR_CONF_LIMIT_FRAMES:
		devc->limit_frames = *(const uint64_t *)value;
		break;
	case SR_CONF_TRIGGER_SLOPE:
		tmp_u64 = *(const int *)value;
		rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SLOP %s\n",
				       tmp_u64 ? "POS" : "NEG");
		break;
	case SR_CONF_HORIZ_TRIGGERPOS:
		tmp_float = *(const float *)value;
		rigol_ds1xx2_send_data(devc->fd, ":TIM:OFFS %.9f\n", tmp_float);
		break;
	case SR_CONF_TIMEBASE:
		tmp_rat = *(const struct sr_rational *)value;
		rigol_ds1xx2_send_data(devc->fd, ":TIM:SCAL %.9f\n",
				       (float)tmp_rat.p / tmp_rat.q);
		break;
	case SR_CONF_TRIGGER_SOURCE:
		if (!strcmp(value, "CH1"))
			channel = "CHAN1";
		else if (!strcmp(value, "CH2"))
			channel = "CHAN2";
		else if (!strcmp(value, "EXT"))
			channel = "EXT";
		else if (!strcmp(value, "AC Line"))
			channel = "ACL";
		else {
			ret = SR_ERR_ARG;
			break;
		}
		rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SOUR %s\n", channel);
		break;
	case SR_CONF_VDIV:
		/* TODO: Not supporting vdiv per channel yet. */
		tmp_rat = *(const struct sr_rational *)value;
		for (i = 0; vdivs[i].p && vdivs[i].q; i++) {
			if (vdivs[i].p == tmp_rat.p
					&& vdivs[i].q == tmp_rat.q) {
				devc->scale = (float)tmp_rat.p / tmp_rat.q;
				for (j = 0; j < 2; j++)
					rigol_ds1xx2_send_data(devc->fd,
					 ":CHAN%d:SCAL %.3f\n", j, devc->scale);
				break;
			}
		}
		if (vdivs[i].p == 0 && vdivs[i].q == 0)
			ret = SR_ERR_ARG;
		break;
	case SR_CONF_COUPLING:
		/* TODO: Not supporting coupling per channel yet. */
		for (i = 0; coupling[i]; i++) {
			if (!strcmp(value, coupling[i])) {
				for (j = 0; j < 2; j++)
					rigol_ds1xx2_send_data(devc->fd,
					  ":CHAN%d:COUP %s\n", j, coupling[i]);
				break;
			}
		}
		if (coupling[i] == 0)
			ret = SR_ERR_ARG;
		break;
	default:
		sr_err("Unknown hardware capability: %d.", id);
		ret = SR_ERR_ARG;
		break;
	}

	return ret;
}

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

	(void)sdi;

	switch (key) {
	case SR_CONF_DEVICE_OPTIONS:
		*data = hwcaps;
		break;
	case SR_CONF_COUPLING:
		*data = coupling;
		break;
	case SR_CONF_VDIV:
		*data = vdivs;
		break;
	case SR_CONF_TIMEBASE:
		*data = timebases;
		break;
	case SR_CONF_TRIGGER_SOURCE:
		*data = trigger_sources;
		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;
	struct sr_datafeed_packet packet;
	struct sr_datafeed_header header;
	char buf[256];
	int len;

	(void)cb_data;

	devc = sdi->priv;

	devc->num_frames = 0;

	sr_source_add(devc->fd, G_IO_IN, 50, rigol_ds1xx2_receive_data, (void *)sdi);

	/* 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);

	/* Hardcoded to CH1 only. */
	devc->enabled_probes = g_slist_append(NULL, sdi->probes->data);
	rigol_ds1xx2_send_data(devc->fd, ":CHAN1:SCAL?\n");
	len = read(devc->fd, buf, sizeof(buf));
	buf[len] = 0;
	devc->scale = atof(buf);
	sr_dbg("Scale is %.3f.", devc->scale);
	rigol_ds1xx2_send_data(devc->fd, ":CHAN1:OFFS?\n");
	len = read(devc->fd, buf, sizeof(buf));
	buf[len] = 0;
	devc->offset = atof(buf);
	sr_dbg("Offset is %.6f.", devc->offset);
	rigol_ds1xx2_send_data(devc->fd, ":WAV:DATA?\n");

	return SR_OK;
}

static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
	struct dev_context *devc;

	(void)cb_data;

	devc = sdi->priv;

	if (sdi->status != SR_ST_ACTIVE) {
		sr_err("Device inactive, can't stop acquisition.");
		return SR_ERR;
	}

	sr_source_remove(devc->fd);

	return SR_OK;
}

SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info = {
	.name = "rigol-ds1xx2",
	.longname = "Rigol DS1xx2",
	.api_version = 1,
	.init = hw_init,
	.cleanup = hw_cleanup,
	.scan = hw_scan,
	.dev_list = hw_dev_list,
	.dev_clear = clear_instances,
	.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
f4816ac6 ML	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2012 Martin Ling <martin-git@earth.li>
	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
e0b7d23c ML	20	#include <fcntl.h>
	21	#include <unistd.h>
	22	#include <stdlib.h>
	23	#include <string.h>
f4816ac6 ML	24	#include <glib.h>
	25	#include "libsigrok.h"
	26	#include "libsigrok-internal.h"
	27	#include "protocol.h"
	28
e0b7d23c	29	static const int hwcaps[] = {
1953564a BV	30	SR_CONF_OSCILLOSCOPE,
	31	SR_CONF_LIMIT_SAMPLES,
	32	SR_CONF_TIMEBASE,
	33	SR_CONF_TRIGGER_SOURCE,
	34	SR_CONF_TRIGGER_SLOPE,
	35	SR_CONF_HORIZ_TRIGGERPOS,
	36	SR_CONF_VDIV,
	37	SR_CONF_COUPLING,
e0b7d23c ML	38	0,
	39	};
	40
e0b7d23c ML	41	static const struct sr_rational timebases[] = {
	42	/* nanoseconds */
	43	{ 2, 1000000000 },
	44	{ 5, 1000000000 },
	45	{ 10, 1000000000 },
	46	{ 20, 1000000000 },
	47	{ 50, 1000000000 },
	48	{ 100, 1000000000 },
	49	{ 500, 1000000000 },
	50	/* microseconds */
	51	{ 1, 1000000 },
	52	{ 2, 1000000 },
	53	{ 5, 1000000 },
	54	{ 10, 1000000 },
	55	{ 20, 1000000 },
	56	{ 50, 1000000 },
	57	{ 100, 1000000 },
	58	{ 200, 1000000 },
	59	{ 500, 1000000 },
	60	/* milliseconds */
	61	{ 1, 1000 },
	62	{ 2, 1000 },
	63	{ 5, 1000 },
	64	{ 10, 1000 },
	65	{ 20, 1000 },
	66	{ 50, 1000 },
	67	{ 100, 1000 },
	68	{ 200, 1000 },
	69	{ 500, 1000 },
	70	/* seconds */
	71	{ 1, 1 },
	72	{ 2, 1 },
	73	{ 5, 1 },
	74	{ 10, 1 },
	75	{ 20, 1 },
	76	{ 50, 1 },
	77	{ 0, 0},
	78	};
	79
	80	static const struct sr_rational vdivs[] = {
	81	/* millivolts */
	82	{ 2, 1000 },
	83	{ 5, 1000 },
	84	{ 10, 1000 },
	85	{ 20, 1000 },
	86	{ 50, 1000 },
	87	{ 100, 1000 },
	88	{ 200, 1000 },
	89	{ 500, 1000 },
	90	/* volts */
	91	{ 1, 1 },
	92	{ 2, 1 },
	93	{ 5, 1 },
	94	{ 10, 1 },
	95	{ 0, 0 },
	96	};
	97
	98	static const char *trigger_sources[] = {
	99	"CH1",
	100	"CH2",
	101	"EXT",
	102	"AC Line",
	103	NULL,
	104	};
105
106	static const char *coupling[] = {
107	"AC",
108	"DC",
109	"GND",
110	NULL,
111	};
112
512bb890 BV	113	static const char *supported_models[] = {
	114	"DS1052E",
	115	"DS1102E",
	116	"DS1052D",
	117	"DS1102D"
	118	};
	119
f4816ac6 ML	120	SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info;
	121	static struct sr_dev_driver *di = &rigol_ds1xx2_driver_info;
	122
	123	/* Properly close and free all devices. */
	124	static int clear_instances(void)
	125	{
	126	struct sr_dev_inst *sdi;
	127	struct drv_context *drvc;
	128	struct dev_context *devc;
	129	GSList *l;
	130
	131	if (!(drvc = di->priv))
	132	return SR_OK;
	133
	134	for (l = drvc->instances; l; l = l->next) {
	135	if (!(sdi = l->data))
	136	continue;
	137	if (!(devc = sdi->priv))
	138	continue;
	139
fb6e5ba8	140	g_free(devc->device);
69e19dd7	141	g_slist_free(devc->enabled_probes);
e0b7d23c	142	close(devc->fd);
f4816ac6 ML	143
	144	sr_dev_inst_free(sdi);
	145	}
	146
	147	g_slist_free(drvc->instances);
	148	drvc->instances = NULL;
	149
	150	return SR_OK;
	151	}
	152
e0b7d23c	153	static int hw_init(struct sr_context *sr_ctx)
f4816ac6 ML	154	{
	155	struct drv_context *drvc;
	156
	157	if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
	158	sr_err("Driver context malloc failed.");
	159	return SR_ERR_MALLOC;
	160	}
	161
c0eea11c	162	drvc->sr_ctx = sr_ctx;
f4816ac6 ML	163	di->priv = drvc;
	164
	165	return SR_OK;
	166	}
	167
	168	static GSList hw_scan(GSList options)
	169	{
	170	struct drv_context *drvc;
e0b7d23c ML	171	struct sr_dev_inst *sdi;
	172	struct dev_context *devc;
	173	struct sr_probe *probe;
f4816ac6	174	GSList *devices;
fb6e5ba8 ML	175	GDir *dir;
	176	const gchar *dev_name;
	177	const gchar *dev_dir = "/dev/";
	178	const gchar *prefix = "usbtmc";
	179	gchar *device;
	180	const gchar idn_query = "IDN?";
29d957ce	181	int len, num_tokens, fd, i;
fb6e5ba8 ML	182	const gchar *delimiter = ",";
fb6e5ba8 ML	183	gchar **tokens;
512bb890 BV	184	const char manufacturer, model, *version;
	185	int num_models;
	186	gboolean matched = FALSE;
fb6e5ba8 ML	187	char buf[256];
fb6e5ba8 ML	188
f4816ac6 ML	189	(void)options;
f4816ac6 ML	190
f4816ac6 ML	191	drvc = di->priv;
	192	drvc->instances = NULL;
	193
4b97c74e UH	194	devices = NULL;
4b97c74e UH	195
fb6e5ba8	196	dir = g_dir_open("/sys/class/usb/", 0, NULL);
e0b7d23c	197
fb6e5ba8 ML	198	if (dir == NULL)
fb6e5ba8 ML	199	return NULL;
e0b7d23c	200
29d957ce	201	while ((dev_name = g_dir_read_name(dir)) != NULL) {
fb6e5ba8 ML	202	if (strncmp(dev_name, prefix, strlen(prefix)))
	203	continue;
	204
	205	device = g_strconcat(dev_dir, dev_name, NULL);
	206
	207	fd = open(device, O_RDWR);
	208	len = write(fd, idn_query, strlen(idn_query));
	209	len = read(fd, buf, sizeof(buf));
	210	close(fd);
29d957ce	211	if (len == 0) {
fb6e5ba8 ML	212	g_free(device);
	213	return NULL;
	214	}
	215
	216	buf[len] = 0;
	217	tokens = g_strsplit(buf, delimiter, 0);
	218	close(fd);
512bb890	219	sr_dbg("response: %s %d [%s]", device, len, buf);
fb6e5ba8 ML	220
	221	for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++);
	222
512bb890	223	if (num_tokens < 4) {
fb6e5ba8 ML	224	g_strfreev(tokens);
fb6e5ba8 ML	225	g_free(device);
e0b7d23c	226	return NULL;
fb6e5ba8	227	}
512bb890 BV	228
	229	manufacturer = tokens[0];
	230	model = tokens[1];
	231	version = tokens[3];
	232
	233	if (strcmp(manufacturer, "Rigol Technologies")) {
	234	g_strfreev(tokens);
	235	g_free(device);
	236	return NULL;
	237	}
	238
	239	num_models = sizeof(supported_models) / sizeof(supported_models[0]);
	240
	241	for (i = 0; i < num_models; i++) {
	242	if (!strcmp(model, supported_models[i])) {
	243	matched = 1;
	244	break;
	245	}
	246	}
	247
	248	if (!matched \|\| !(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE,
	249	manufacturer, model, version))) {
	250	g_strfreev(tokens);
	251	g_free(device);
	252	return NULL;
	253	}
	254
fb6e5ba8 ML	255	g_strfreev(tokens);
fb6e5ba8 ML	256
29d957ce UH	257	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
29d957ce UH	258	sr_err("Device context malloc failed.");
fb6e5ba8 ML	259	g_free(device);
	260	return NULL;
	261	}
	262
	263	devc->device = device;
	264
	265	sdi->priv = devc;
	266	sdi->driver = di;
	267
29d957ce UH	268	for (i = 0; i < 2; i++) {
	269	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE,
	270	i == 0 ? "CH1" : "CH2")))
fb6e5ba8 ML	271	return NULL;
	272	sdi->probes = g_slist_append(sdi->probes, probe);
	273	}
	274
	275	drvc->instances = g_slist_append(drvc->instances, sdi);
	276	devices = g_slist_append(devices, sdi);
e0b7d23c	277	}
fb6e5ba8 ML	278
fb6e5ba8 ML	279	g_dir_close(dir);
f4816ac6 ML	280
	281	return devices;
	282	}
	283
	284	static GSList *hw_dev_list(void)
	285	{
	286	struct drv_context *drvc;
	287
	288	drvc = di->priv;
	289
	290	return drvc->instances;
	291	}
	292
	293	static int hw_dev_open(struct sr_dev_inst *sdi)
	294	{
29d957ce UH	295	struct dev_context *devc;
29d957ce UH	296	int fd;
fb6e5ba8	297
29d957ce	298	devc = sdi->priv;
e0b7d23c	299
29d957ce	300	if ((fd = open(devc->device, O_RDWR)) == -1)
e0b7d23c ML	301	return SR_ERR;
e0b7d23c ML	302
e0b7d23c ML	303	devc->fd = fd;
	304
	305	devc->scale = 1;
f4816ac6 ML	306
	307	return SR_OK;
	308	}
	309
	310	static int hw_dev_close(struct sr_dev_inst *sdi)
	311	{
29d957ce UH	312	struct dev_context *devc;
	313
	314	devc = sdi->priv;
e0b7d23c ML	315
e0b7d23c ML	316	close(devc->fd);
f4816ac6 ML	317
	318	return SR_OK;
	319	}
	320
	321	static int hw_cleanup(void)
	322	{
	323	clear_instances();
	324
f4816ac6 ML	325	return SR_OK;
	326	}
	327
035a1078	328	static int config_set(int id, const void value, const struct sr_dev_inst sdi)
f4816ac6	329	{
29d957ce	330	struct dev_context *devc;
e0b7d23c ML	331	uint64_t tmp_u64;
	332	float tmp_float;
	333	struct sr_rational tmp_rat;
	334	int ret, i, j;
	335	char *channel;
f4816ac6	336
29d957ce UH	337	devc = sdi->priv;
29d957ce UH	338
f4816ac6 ML	339	if (sdi->status != SR_ST_ACTIVE) {
	340	sr_err("Device inactive, can't set config options.");
	341	return SR_ERR;
	342	}
	343
	344	ret = SR_OK;
035a1078	345	switch (id) {
1953564a	346	case SR_CONF_LIMIT_FRAMES:
e0b7d23c ML	347	devc->limit_frames = (const uint64_t )value;
e0b7d23c ML	348	break;
1953564a	349	case SR_CONF_TRIGGER_SLOPE:
e0b7d23c	350	tmp_u64 = (const int )value;
29d957ce UH	351	rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SLOP %s\n",
29d957ce UH	352	tmp_u64 ? "POS" : "NEG");
e0b7d23c	353	break;
1953564a	354	case SR_CONF_HORIZ_TRIGGERPOS:
e0b7d23c	355	tmp_float = (const float )value;
542843f7	356	rigol_ds1xx2_send_data(devc->fd, ":TIM:OFFS %.9f\n", tmp_float);
e0b7d23c	357	break;
1953564a	358	case SR_CONF_TIMEBASE:
e0b7d23c	359	tmp_rat = (const struct sr_rational )value;
29d957ce UH	360	rigol_ds1xx2_send_data(devc->fd, ":TIM:SCAL %.9f\n",
29d957ce UH	361	(float)tmp_rat.p / tmp_rat.q);
e0b7d23c	362	break;
1953564a	363	case SR_CONF_TRIGGER_SOURCE:
e0b7d23c ML	364	if (!strcmp(value, "CH1"))
	365	channel = "CHAN1";
	366	else if (!strcmp(value, "CH2"))
	367	channel = "CHAN2";
	368	else if (!strcmp(value, "EXT"))
	369	channel = "EXT";
	370	else if (!strcmp(value, "AC Line"))
	371	channel = "ACL";
29d957ce	372	else {
e0b7d23c ML	373	ret = SR_ERR_ARG;
e0b7d23c ML	374	break;
4e108ace ML	375	}
4e108ace ML	376	rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SOUR %s\n", channel);
e0b7d23c	377	break;
1953564a	378	case SR_CONF_VDIV:
e0b7d23c ML	379	/* TODO: Not supporting vdiv per channel yet. */
	380	tmp_rat = (const struct sr_rational )value;
	381	for (i = 0; vdivs[i].p && vdivs[i].q; i++) {
	382	if (vdivs[i].p == tmp_rat.p
	383	&& vdivs[i].q == tmp_rat.q) {
29d957ce	384	devc->scale = (float)tmp_rat.p / tmp_rat.q;
e0b7d23c	385	for (j = 0; j < 2; j++)
29d957ce UH	386	rigol_ds1xx2_send_data(devc->fd,
29d957ce UH	387	":CHAN%d:SCAL %.3f\n", j, devc->scale);
e0b7d23c ML	388	break;
	389	}
	390	}
	391	if (vdivs[i].p == 0 && vdivs[i].q == 0)
	392	ret = SR_ERR_ARG;
	393	break;
1953564a	394	case SR_CONF_COUPLING:
e0b7d23c ML	395	/* TODO: Not supporting coupling per channel yet. */
	396	for (i = 0; coupling[i]; i++) {
	397	if (!strcmp(value, coupling[i])) {
	398	for (j = 0; j < 2; j++)
29d957ce UH	399	rigol_ds1xx2_send_data(devc->fd,
29d957ce UH	400	":CHAN%d:COUP %s\n", j, coupling[i]);
e0b7d23c ML	401	break;
	402	}
	403	}
	404	if (coupling[i] == 0)
	405	ret = SR_ERR_ARG;
	406	break;
f4816ac6	407	default:
035a1078	408	sr_err("Unknown hardware capability: %d.", id);
f4816ac6	409	ret = SR_ERR_ARG;
29d957ce	410	break;
f4816ac6 ML	411	}
	412
	413	return ret;
	414	}
	415
a1c743fc BV	416	static int config_list(int key, const void *data, const struct sr_dev_inst sdi)
	417	{
	418
	419	(void)sdi;
	420
	421	switch (key) {
9a6517d1 BV	422	case SR_CONF_DEVICE_OPTIONS:
	423	*data = hwcaps;
	424	break;
2a7b113d BV	425	case SR_CONF_COUPLING:
	426	*data = coupling;
	427	break;
e4f2b2ad BV	428	case SR_CONF_VDIV:
	429	*data = vdivs;
	430	break;
41f5bd09 BV	431	case SR_CONF_TIMEBASE:
	432	*data = timebases;
	433	break;
328bafab BV	434	case SR_CONF_TRIGGER_SOURCE:
	435	*data = trigger_sources;
	436	break;
a1c743fc BV	437	default:
	438	return SR_ERR_ARG;
	439	}
	440
	441	return SR_OK;
	442	}
	443
f4816ac6 ML	444	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
	445	void *cb_data)
	446	{
29d957ce	447	struct dev_context *devc;
e0b7d23c ML	448	struct sr_datafeed_packet packet;
e0b7d23c ML	449	struct sr_datafeed_header header;
e0b7d23c ML	450	char buf[256];
e0b7d23c ML	451	int len;
29d957ce	452
e0b7d23c ML	453	(void)cb_data;
e0b7d23c ML	454
29d957ce UH	455	devc = sdi->priv;
29d957ce UH	456
e0b7d23c ML	457	devc->num_frames = 0;
	458
	459	sr_source_add(devc->fd, G_IO_IN, 50, rigol_ds1xx2_receive_data, (void *)sdi);
	460
	461	/* Send header packet to the session bus. */
	462	packet.type = SR_DF_HEADER;
	463	packet.payload = (unsigned char *)&header;
	464	header.feed_version = 1;
	465	gettimeofday(&header.starttime, NULL);
	466	sr_session_send(cb_data, &packet);
	467
69e19dd7 BV	468	/* Hardcoded to CH1 only. */
69e19dd7 BV	469	devc->enabled_probes = g_slist_append(NULL, sdi->probes->data);
e0b7d23c ML	470	rigol_ds1xx2_send_data(devc->fd, ":CHAN1:SCAL?\n");
	471	len = read(devc->fd, buf, sizeof(buf));
	472	buf[len] = 0;
	473	devc->scale = atof(buf);
29d957ce	474	sr_dbg("Scale is %.3f.", devc->scale);
e0b7d23c ML	475	rigol_ds1xx2_send_data(devc->fd, ":CHAN1:OFFS?\n");
	476	len = read(devc->fd, buf, sizeof(buf));
	477	buf[len] = 0;
	478	devc->offset = atof(buf);
29d957ce	479	sr_dbg("Offset is %.6f.", devc->offset);
e0b7d23c	480	rigol_ds1xx2_send_data(devc->fd, ":WAV:DATA?\n");
f4816ac6 ML	481
	482	return SR_OK;
	483	}
	484
	485	static int hw_dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	486	{
29d957ce UH	487	struct dev_context *devc;
29d957ce UH	488
f4816ac6 ML	489	(void)cb_data;
f4816ac6 ML	490
29d957ce UH	491	devc = sdi->priv;
29d957ce UH	492
f4816ac6 ML	493	if (sdi->status != SR_ST_ACTIVE) {
	494	sr_err("Device inactive, can't stop acquisition.");
	495	return SR_ERR;
	496	}
	497
e0b7d23c	498	sr_source_remove(devc->fd);
f4816ac6 ML	499
	500	return SR_OK;
	501	}
	502
	503	SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info = {
	504	.name = "rigol-ds1xx2",
	505	.longname = "Rigol DS1xx2",
	506	.api_version = 1,
	507	.init = hw_init,
	508	.cleanup = hw_cleanup,
	509	.scan = hw_scan,
	510	.dev_list = hw_dev_list,
	511	.dev_clear = clear_instances,
035a1078	512	.config_set = config_set,
a1c743fc	513	.config_list = config_list,
f4816ac6 ML	514	.dev_open = hw_dev_open,
f4816ac6 ML	515	.dev_close = hw_dev_close,
f4816ac6 ML	516	.dev_acquisition_start = hw_dev_acquisition_start,
	517	.dev_acquisition_stop = hw_dev_acquisition_stop,
	518	.priv = NULL,
	519	};