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

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

#define NUM_TIMEBASE  12
#define NUM_VDIV      8

static const int32_t 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,
	SR_CONF_NUM_TIMEBASE,
	SR_CONF_NUM_VDIV,
};

static const uint64_t timebases[][2] = {
	/* 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 },
};

static const uint64_t vdivs[][2] = {
	/* 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 },
};

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

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

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)
{
	return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN);
}

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?";
	unsigned int i;
	int len, num_tokens, fd;
	const gchar *delimiter = ",";
	gchar **tokens;
	const char *manufacturer, *model, *version;
	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;
		}

		for (i = 0; i < ARRAY_SIZE(supported_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)
{
	return ((struct drv_context *)(di->priv))->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_get(int id, GVariant **data, const struct sr_dev_inst *sdi)
{

	(void)sdi;

	switch (id) {
	case SR_CONF_NUM_TIMEBASE:
		*data = g_variant_new_int32(NUM_TIMEBASE);
		break;
	case SR_CONF_NUM_VDIV:
		*data = g_variant_new_int32(NUM_VDIV);
		break;
	default:
		return SR_ERR_ARG;
	}

	return SR_OK;
}

static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	uint64_t tmp_u64, p, q;
	double tmp_double;
	unsigned int i;
	int tmp_int, ret;
	const char *tmp_str, *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 = g_variant_get_uint64(data);
		break;
	case SR_CONF_TRIGGER_SLOPE:
		tmp_u64 = g_variant_get_uint64(data);
		rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SLOP %s",
				       tmp_u64 ? "POS" : "NEG");
		break;
	case SR_CONF_HORIZ_TRIGGERPOS:
		tmp_double = g_variant_get_double(data);
		rigol_ds1xx2_send_data(devc->fd, ":TIM:OFFS %.9f", tmp_double);
		break;
	case SR_CONF_TIMEBASE:
		g_variant_get(data, "(tt)", &p, &q);
		tmp_int = -1;
		for (i = 0; i < ARRAY_SIZE(timebases); i++) {
			if (timebases[i][0] == p && timebases[i][1] == q) {
				tmp_int = i;
				break;
			}
		}
		if (tmp_int >= 0)
			rigol_ds1xx2_send_data(devc->fd, ":TIM:SCAL %.9f",
					(float)timebases[i][0] / timebases[i][1]);
		break;
	case SR_CONF_TRIGGER_SOURCE:
		tmp_str = g_variant_get_string(data, NULL);
		if (!strcmp(tmp_str, "CH1"))
			channel = "CHAN1";
		else if (!strcmp(tmp_str, "CH2"))
			channel = "CHAN2";
		else if (!strcmp(tmp_str, "EXT"))
			channel = "EXT";
		else if (!strcmp(tmp_str, "AC Line"))
			channel = "ACL";
		else {
			ret = SR_ERR_ARG;
			break;
		}
		rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SOUR %s", channel);
		break;
	case SR_CONF_VDIV:
		g_variant_get(data, "(tt)", &p, &q);
		tmp_int = -1;
		for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
			if (vdivs[i][0] != p || vdivs[i][1] != q)
				continue;
			devc->scale = (float)vdivs[i][0] / vdivs[i][1];
			rigol_ds1xx2_send_data(devc->fd, ":CHAN1:SCAL %.3f",
					devc->scale);
			break;
		}
		if (i == ARRAY_SIZE(vdivs))
			ret = SR_ERR_ARG;
		break;
	case SR_CONF_COUPLING:
		/* TODO: Not supporting coupling per channel yet. */
		tmp_str = g_variant_get_string(data, NULL);
		for (i = 0; i < ARRAY_SIZE(coupling); i++) {
			if (!strcmp(tmp_str, coupling[i])) {
				rigol_ds1xx2_send_data(devc->fd, ":CHAN1:COUP %s",
						coupling[i]);
				rigol_ds1xx2_send_data(devc->fd, ":CHAN2:COUP %s",
						coupling[i]);
				break;
			}
		}
		if (i == ARRAY_SIZE(coupling))
			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, GVariant **data, const struct sr_dev_inst *sdi)
{
	GVariant *tuple, *rational[2];
	GVariantBuilder gvb;
	unsigned int i;

	(void)sdi;

	switch (key) {
	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_COUPLING:
		*data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
		break;
	case SR_CONF_VDIV:
		g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
		for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
			rational[0] = g_variant_new_uint64(vdivs[i][0]);
			rational[1] = g_variant_new_uint64(vdivs[i][1]);
			tuple = g_variant_new_tuple(rational, 2);
			g_variant_builder_add_value(&gvb, tuple);
		}
		*data = g_variant_builder_end(&gvb);
		break;
	case SR_CONF_TIMEBASE:
		g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
		for (i = 0; i < ARRAY_SIZE(timebases); i++) {
			rational[0] = g_variant_new_uint64(timebases[i][0]);
			rational[1] = g_variant_new_uint64(timebases[i][1]);
			tuple = g_variant_new_tuple(rational, 2);
			g_variant_builder_add_value(&gvb, tuple);
		}
		*data = g_variant_builder_end(&gvb);
		break;
	case SR_CONF_TRIGGER_SOURCE:
		*data = g_variant_new_strv(trigger_sources,
				ARRAY_SIZE(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;
	char buf[256];
	int len;

	(void)cb_data;

	devc = sdi->priv;

	devc->num_frames = devc->num_frame_samples = 0;

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

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

	/* Hardcoded to CH1 only. */
	devc->enabled_probes = g_slist_append(NULL, sdi->probes->data);
	rigol_ds1xx2_send_data(devc->fd, ":CHAN1:SCAL?");
	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?");
	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?");

	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_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 libsigrok project.
	3	*
	4	* Copyright (C) 2012 Martin Ling <martin-git@earth.li>
	5	* Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
	6	*
	7	* This program is free software: you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation, either version 3 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	19	*/
	20
	21	#include <fcntl.h>
	22	#include <unistd.h>
	23	#include <stdlib.h>
	24	#include <string.h>
	25	#include <glib.h>
	26	#include "libsigrok.h"
	27	#include "libsigrok-internal.h"
	28	#include "protocol.h"
	29
	30	#define NUM_TIMEBASE 12
	31	#define NUM_VDIV 8
	32
	33	static const int32_t hwcaps[] = {
	34	SR_CONF_OSCILLOSCOPE,
	35	SR_CONF_LIMIT_SAMPLES,
	36	SR_CONF_TIMEBASE,
	37	SR_CONF_TRIGGER_SOURCE,
	38	SR_CONF_TRIGGER_SLOPE,
	39	SR_CONF_HORIZ_TRIGGERPOS,
	40	SR_CONF_VDIV,
	41	SR_CONF_COUPLING,
	42	SR_CONF_NUM_TIMEBASE,
	43	SR_CONF_NUM_VDIV,
	44	};
	45
	46	static const uint64_t timebases[][2] = {
	47	/* nanoseconds */
	48	{ 2, 1000000000 },
	49	{ 5, 1000000000 },
	50	{ 10, 1000000000 },
	51	{ 20, 1000000000 },
	52	{ 50, 1000000000 },
	53	{ 100, 1000000000 },
	54	{ 500, 1000000000 },
	55	/* microseconds */
	56	{ 1, 1000000 },
	57	{ 2, 1000000 },
	58	{ 5, 1000000 },
	59	{ 10, 1000000 },
	60	{ 20, 1000000 },
	61	{ 50, 1000000 },
	62	{ 100, 1000000 },
	63	{ 200, 1000000 },
	64	{ 500, 1000000 },
	65	/* milliseconds */
	66	{ 1, 1000 },
	67	{ 2, 1000 },
	68	{ 5, 1000 },
	69	{ 10, 1000 },
	70	{ 20, 1000 },
	71	{ 50, 1000 },
	72	{ 100, 1000 },
	73	{ 200, 1000 },
	74	{ 500, 1000 },
	75	/* seconds */
	76	{ 1, 1 },
	77	{ 2, 1 },
	78	{ 5, 1 },
	79	{ 10, 1 },
	80	{ 20, 1 },
	81	{ 50, 1 },
	82	};
	83
	84	static const uint64_t vdivs[][2] = {
	85	/* millivolts */
	86	{ 2, 1000 },
	87	{ 5, 1000 },
	88	{ 10, 1000 },
	89	{ 20, 1000 },
	90	{ 50, 1000 },
	91	{ 100, 1000 },
	92	{ 200, 1000 },
	93	{ 500, 1000 },
	94	/* volts */
	95	{ 1, 1 },
	96	{ 2, 1 },
	97	{ 5, 1 },
	98	{ 10, 1 },
	99	};
	100
	101	static const char *trigger_sources[] = {
	102	"CH1",
	103	"CH2",
	104	"EXT",
	105	"AC Line",
	106	};
	107
	108	static const char *coupling[] = {
	109	"AC",
	110	"DC",
	111	"GND",
	112	};
	113
	114	static const char *supported_models[] = {
	115	"DS1052E",
	116	"DS1102E",
	117	"DS1052D",
	118	"DS1102D",
	119	};
	120
	121	SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info;
	122	static struct sr_dev_driver *di = &rigol_ds1xx2_driver_info;
	123
	124	/* Properly close and free all devices. */
	125	static int clear_instances(void)
	126	{
	127	struct sr_dev_inst *sdi;
	128	struct drv_context *drvc;
	129	struct dev_context *devc;
	130	GSList *l;
	131
	132	if (!(drvc = di->priv))
	133	return SR_OK;
	134
	135	for (l = drvc->instances; l; l = l->next) {
	136	if (!(sdi = l->data))
	137	continue;
	138	if (!(devc = sdi->priv))
	139	continue;
	140
	141	g_free(devc->device);
	142	g_slist_free(devc->enabled_probes);
	143	close(devc->fd);
	144
	145	sr_dev_inst_free(sdi);
	146	}
	147
	148	g_slist_free(drvc->instances);
	149	drvc->instances = NULL;
	150
	151	return SR_OK;
	152	}
	153
	154	static int hw_init(struct sr_context *sr_ctx)
	155	{
	156	return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN);
	157	}
	158
	159	static GSList hw_scan(GSList options)
	160	{
	161	struct drv_context *drvc;
	162	struct sr_dev_inst *sdi;
	163	struct dev_context *devc;
	164	struct sr_probe *probe;
	165	GSList *devices;
	166	GDir *dir;
	167	const gchar *dev_name;
	168	const gchar *dev_dir = "/dev/";
	169	const gchar *prefix = "usbtmc";
	170	gchar *device;
	171	const gchar idn_query = "IDN?";
	172	unsigned int i;
	173	int len, num_tokens, fd;
	174	const gchar *delimiter = ",";
	175	gchar **tokens;
	176	const char manufacturer, model, *version;
	177	gboolean matched = FALSE;
	178	char buf[256];
	179
	180	(void)options;
	181
	182	drvc = di->priv;
	183	drvc->instances = NULL;
	184
	185	devices = NULL;
	186
	187	dir = g_dir_open("/sys/class/usb/", 0, NULL);
	188
	189	if (dir == NULL)
	190	return NULL;
	191
	192	while ((dev_name = g_dir_read_name(dir)) != NULL) {
	193	if (strncmp(dev_name, prefix, strlen(prefix)))
	194	continue;
	195
	196	device = g_strconcat(dev_dir, dev_name, NULL);
	197
	198	fd = open(device, O_RDWR);
	199	len = write(fd, idn_query, strlen(idn_query));
	200	len = read(fd, buf, sizeof(buf));
	201	close(fd);
	202	if (len == 0) {
	203	g_free(device);
	204	return NULL;
	205	}
	206
	207	buf[len] = 0;
	208	tokens = g_strsplit(buf, delimiter, 0);
	209	close(fd);
	210	sr_dbg("response: %s %d [%s]", device, len, buf);
	211
	212	for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++);
	213
	214	if (num_tokens < 4) {
	215	g_strfreev(tokens);
	216	g_free(device);
	217	return NULL;
	218	}
	219
	220	manufacturer = tokens[0];
	221	model = tokens[1];
	222	version = tokens[3];
	223
	224	if (strcmp(manufacturer, "Rigol Technologies")) {
	225	g_strfreev(tokens);
	226	g_free(device);
	227	return NULL;
	228	}
	229
	230	for (i = 0; i < ARRAY_SIZE(supported_models); i++) {
	231	if (!strcmp(model, supported_models[i])) {
	232	matched = 1;
	233	break;
	234	}
	235	}
	236
	237	if (!matched \|\| !(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE,
	238	manufacturer, model, version))) {
	239	g_strfreev(tokens);
	240	g_free(device);
	241	return NULL;
	242	}
	243
	244	g_strfreev(tokens);
	245
	246	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
	247	sr_err("Device context malloc failed.");
	248	g_free(device);
	249	return NULL;
	250	}
	251
	252	devc->device = device;
	253
	254	sdi->priv = devc;
	255	sdi->driver = di;
	256
	257	for (i = 0; i < 2; i++) {
	258	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE,
	259	i == 0 ? "CH1" : "CH2")))
	260	return NULL;
	261	sdi->probes = g_slist_append(sdi->probes, probe);
	262	}
	263
	264	drvc->instances = g_slist_append(drvc->instances, sdi);
	265	devices = g_slist_append(devices, sdi);
	266	}
	267
	268	g_dir_close(dir);
	269
	270	return devices;
	271	}
	272
	273	static GSList *hw_dev_list(void)
	274	{
	275	return ((struct drv_context *)(di->priv))->instances;
	276	}
	277
	278	static int hw_dev_open(struct sr_dev_inst *sdi)
	279	{
	280	struct dev_context *devc;
	281	int fd;
	282
	283	devc = sdi->priv;
	284
	285	if ((fd = open(devc->device, O_RDWR)) == -1)
	286	return SR_ERR;
	287
	288	devc->fd = fd;
	289
	290	devc->scale = 1;
	291
	292	return SR_OK;
	293	}
	294
	295	static int hw_dev_close(struct sr_dev_inst *sdi)
	296	{
	297	struct dev_context *devc;
	298
	299	devc = sdi->priv;
	300
	301	close(devc->fd);
	302
	303	return SR_OK;
	304	}
	305
	306	static int hw_cleanup(void)
	307	{
	308	clear_instances();
	309
	310	return SR_OK;
	311	}
	312
	313	static int config_get(int id, GVariant *data, const struct sr_dev_inst sdi)
	314	{
	315
	316	(void)sdi;
	317
	318	switch (id) {
	319	case SR_CONF_NUM_TIMEBASE:
	320	*data = g_variant_new_int32(NUM_TIMEBASE);
	321	break;
	322	case SR_CONF_NUM_VDIV:
	323	*data = g_variant_new_int32(NUM_VDIV);
	324	break;
	325	default:
	326	return SR_ERR_ARG;
	327	}
	328
	329	return SR_OK;
	330	}
	331
	332	static int config_set(int id, GVariant data, const struct sr_dev_inst sdi)
	333	{
	334	struct dev_context *devc;
	335	uint64_t tmp_u64, p, q;
	336	double tmp_double;
	337	unsigned int i;
	338	int tmp_int, ret;
	339	const char tmp_str, channel;
	340
	341	devc = sdi->priv;
	342
	343	if (sdi->status != SR_ST_ACTIVE) {
	344	sr_err("Device inactive, can't set config options.");
	345	return SR_ERR;
	346	}
	347
	348	ret = SR_OK;
	349	switch (id) {
	350	case SR_CONF_LIMIT_FRAMES:
	351	devc->limit_frames = g_variant_get_uint64(data);
	352	break;
	353	case SR_CONF_TRIGGER_SLOPE:
	354	tmp_u64 = g_variant_get_uint64(data);
	355	rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SLOP %s",
	356	tmp_u64 ? "POS" : "NEG");
	357	break;
	358	case SR_CONF_HORIZ_TRIGGERPOS:
	359	tmp_double = g_variant_get_double(data);
	360	rigol_ds1xx2_send_data(devc->fd, ":TIM:OFFS %.9f", tmp_double);
	361	break;
	362	case SR_CONF_TIMEBASE:
	363	g_variant_get(data, "(tt)", &p, &q);
	364	tmp_int = -1;
	365	for (i = 0; i < ARRAY_SIZE(timebases); i++) {
	366	if (timebases[i][0] == p && timebases[i][1] == q) {
	367	tmp_int = i;
	368	break;
	369	}
	370	}
	371	if (tmp_int >= 0)
	372	rigol_ds1xx2_send_data(devc->fd, ":TIM:SCAL %.9f",
	373	(float)timebases[i][0] / timebases[i][1]);
	374	break;
	375	case SR_CONF_TRIGGER_SOURCE:
	376	tmp_str = g_variant_get_string(data, NULL);
	377	if (!strcmp(tmp_str, "CH1"))
	378	channel = "CHAN1";
	379	else if (!strcmp(tmp_str, "CH2"))
	380	channel = "CHAN2";
	381	else if (!strcmp(tmp_str, "EXT"))
	382	channel = "EXT";
	383	else if (!strcmp(tmp_str, "AC Line"))
	384	channel = "ACL";
	385	else {
	386	ret = SR_ERR_ARG;
	387	break;
	388	}
	389	rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SOUR %s", channel);
	390	break;
	391	case SR_CONF_VDIV:
	392	g_variant_get(data, "(tt)", &p, &q);
	393	tmp_int = -1;
	394	for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
	395	if (vdivs[i][0] != p \|\| vdivs[i][1] != q)
	396	continue;
	397	devc->scale = (float)vdivs[i][0] / vdivs[i][1];
	398	rigol_ds1xx2_send_data(devc->fd, ":CHAN1:SCAL %.3f",
	399	devc->scale);
	400	break;
	401	}
	402	if (i == ARRAY_SIZE(vdivs))
	403	ret = SR_ERR_ARG;
	404	break;
	405	case SR_CONF_COUPLING:
	406	/* TODO: Not supporting coupling per channel yet. */
	407	tmp_str = g_variant_get_string(data, NULL);
	408	for (i = 0; i < ARRAY_SIZE(coupling); i++) {
	409	if (!strcmp(tmp_str, coupling[i])) {
	410	rigol_ds1xx2_send_data(devc->fd, ":CHAN1:COUP %s",
	411	coupling[i]);
	412	rigol_ds1xx2_send_data(devc->fd, ":CHAN2:COUP %s",
	413	coupling[i]);
	414	break;
	415	}
	416	}
	417	if (i == ARRAY_SIZE(coupling))
	418	ret = SR_ERR_ARG;
	419	break;
	420	default:
	421	sr_err("Unknown hardware capability: %d.", id);
	422	ret = SR_ERR_ARG;
	423	break;
	424	}
	425
	426	return ret;
	427	}
	428
	429	static int config_list(int key, GVariant *data, const struct sr_dev_inst sdi)
	430	{
	431	GVariant tuple, rational[2];
	432	GVariantBuilder gvb;
	433	unsigned int i;
	434
	435	(void)sdi;
	436
	437	switch (key) {
	438	case SR_CONF_DEVICE_OPTIONS:
	439	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	440	hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
	441	break;
	442	case SR_CONF_COUPLING:
	443	*data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
	444	break;
	445	case SR_CONF_VDIV:
	446	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
	447	for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
	448	rational[0] = g_variant_new_uint64(vdivs[i][0]);
	449	rational[1] = g_variant_new_uint64(vdivs[i][1]);
	450	tuple = g_variant_new_tuple(rational, 2);
	451	g_variant_builder_add_value(&gvb, tuple);
	452	}
	453	*data = g_variant_builder_end(&gvb);
	454	break;
	455	case SR_CONF_TIMEBASE:
	456	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
	457	for (i = 0; i < ARRAY_SIZE(timebases); i++) {
	458	rational[0] = g_variant_new_uint64(timebases[i][0]);
	459	rational[1] = g_variant_new_uint64(timebases[i][1]);
	460	tuple = g_variant_new_tuple(rational, 2);
	461	g_variant_builder_add_value(&gvb, tuple);
	462	}
	463	*data = g_variant_builder_end(&gvb);
	464	break;
	465	case SR_CONF_TRIGGER_SOURCE:
	466	*data = g_variant_new_strv(trigger_sources,
	467	ARRAY_SIZE(trigger_sources));
	468	break;
	469	default:
	470	return SR_ERR_ARG;
	471	}
	472
	473	return SR_OK;
	474	}
	475
	476	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
	477	void *cb_data)
	478	{
	479	struct dev_context *devc;
	480	char buf[256];
	481	int len;
	482
	483	(void)cb_data;
	484
	485	devc = sdi->priv;
	486
	487	devc->num_frames = devc->num_frame_samples = 0;
	488
	489	sr_source_add(devc->fd, G_IO_IN, 50, rigol_ds1xx2_receive_data, (void *)sdi);
	490
	491	/* Send header packet to the session bus. */
	492	std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN);
	493
	494	/* Hardcoded to CH1 only. */
	495	devc->enabled_probes = g_slist_append(NULL, sdi->probes->data);
	496	rigol_ds1xx2_send_data(devc->fd, ":CHAN1:SCAL?");
	497	len = read(devc->fd, buf, sizeof(buf));
	498	buf[len] = 0;
	499	devc->scale = atof(buf);
	500	sr_dbg("Scale is %.3f.", devc->scale);
	501	rigol_ds1xx2_send_data(devc->fd, ":CHAN1:OFFS?");
	502	len = read(devc->fd, buf, sizeof(buf));
	503	buf[len] = 0;
	504	devc->offset = atof(buf);
	505	sr_dbg("Offset is %.6f.", devc->offset);
	506	rigol_ds1xx2_send_data(devc->fd, ":WAV:DATA?");
	507
	508	return SR_OK;
	509	}
	510
	511	static int hw_dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	512	{
	513	struct dev_context *devc;
	514
	515	(void)cb_data;
	516
	517	devc = sdi->priv;
	518
	519	if (sdi->status != SR_ST_ACTIVE) {
	520	sr_err("Device inactive, can't stop acquisition.");
	521	return SR_ERR;
	522	}
	523
	524	sr_source_remove(devc->fd);
	525
	526	return SR_OK;
	527	}
	528
	529	SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info = {
	530	.name = "rigol-ds1xx2",
	531	.longname = "Rigol DS1xx2",
	532	.api_version = 1,
	533	.init = hw_init,
	534	.cleanup = hw_cleanup,
	535	.scan = hw_scan,
	536	.dev_list = hw_dev_list,
	537	.dev_clear = clear_instances,
	538	.config_get = config_get,
	539	.config_set = config_set,
	540	.config_list = config_list,
	541	.dev_open = hw_dev_open,
	542	.dev_close = hw_dev_close,
	543	.dev_acquisition_start = hw_dev_acquisition_start,
	544	.dev_acquisition_stop = hw_dev_acquisition_stop,
	545	.priv = NULL,
	546	};