[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"

#define NUM_PROBES 2

static const int hwcaps[] = {
	SR_HWCAP_OSCILLOSCOPE,
	SR_HWCAP_LIMIT_SAMPLES,
	SR_HWCAP_TIMEBASE,
	SR_HWCAP_TRIGGER_SOURCE,
	SR_HWCAP_TRIGGER_SLOPE,
	SR_HWCAP_HORIZ_TRIGGERPOS,
	SR_HWCAP_VDIV,
	SR_HWCAP_COUPLING,
	0,
};

static const char *probe_names[] = {
	"CH1", "CH2",
	NULL,
};

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);
		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;
	(void)sr_ctx;

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

	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;

	devices = NULL;
	drvc = di->priv;
	drvc->instances = 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 hw_info_get(int info_id, const void **data,
		       const struct sr_dev_inst *sdi)
{
	(void)sdi;

	switch (info_id) {
	case SR_DI_HWCAPS:
		*data = hwcaps;
		break;
	case SR_DI_NUM_PROBES:
		*data = GINT_TO_POINTER(NUM_PROBES);
		break;
	case SR_DI_PROBE_NAMES:
		*data = probe_names;
		break;
	case SR_DI_TIMEBASES:
		*data = timebases;
		break;
	case SR_DI_TRIGGER_SOURCES:
		*data = trigger_sources;
		break;
	case SR_DI_VDIVS:
		*data = vdivs;
		break;
	case SR_DI_COUPLING:
		*data = coupling;
		break;
	default:
		sr_err("Unknown info_id: %d.", info_id);
		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;
	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 (hwcap) {
	case SR_HWCAP_LIMIT_FRAMES:
		devc->limit_frames = *(const uint64_t *)value;
		break;
	case SR_HWCAP_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_HWCAP_HORIZ_TRIGGERPOS:
		tmp_float = *(const float *)value;
		rigol_ds1xx2_send_data(devc->fd, ":TIM:OFFS %.9f\n", tmp_float);
		break;
	case SR_HWCAP_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_HWCAP_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_HWCAP_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_HWCAP_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.", hwcap);
		ret = SR_ERR_ARG;
		break;
	}

	return ret;
}

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;
	struct sr_datafeed_meta_analog meta;
	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);

	/* Send metadata about the SR_DF_ANALOG packets to come. */
	packet.type = SR_DF_META_ANALOG;
	packet.payload = &meta;
	meta.num_probes = NUM_PROBES;
	sr_session_send(cb_data, &packet);

	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,
	.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
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 ML	29	#define NUM_PROBES 2
	30
	31	static const int hwcaps[] = {
	32	SR_HWCAP_OSCILLOSCOPE,
	33	SR_HWCAP_LIMIT_SAMPLES,
	34	SR_HWCAP_TIMEBASE,
	35	SR_HWCAP_TRIGGER_SOURCE,
	36	SR_HWCAP_TRIGGER_SLOPE,
	37	SR_HWCAP_HORIZ_TRIGGERPOS,
	38	SR_HWCAP_VDIV,
	39	SR_HWCAP_COUPLING,
	40	0,
	41	};
	42
	43	static const char *probe_names[] = {
	44	"CH1", "CH2",
	45	NULL,
	46	};
	47
	48	static const struct sr_rational timebases[] = {
	49	/* nanoseconds */
	50	{ 2, 1000000000 },
	51	{ 5, 1000000000 },
	52	{ 10, 1000000000 },
	53	{ 20, 1000000000 },
	54	{ 50, 1000000000 },
	55	{ 100, 1000000000 },
	56	{ 500, 1000000000 },
	57	/* microseconds */
	58	{ 1, 1000000 },
	59	{ 2, 1000000 },
	60	{ 5, 1000000 },
	61	{ 10, 1000000 },
	62	{ 20, 1000000 },
	63	{ 50, 1000000 },
	64	{ 100, 1000000 },
	65	{ 200, 1000000 },
	66	{ 500, 1000000 },
	67	/* milliseconds */
	68	{ 1, 1000 },
	69	{ 2, 1000 },
	70	{ 5, 1000 },
	71	{ 10, 1000 },
	72	{ 20, 1000 },
	73	{ 50, 1000 },
	74	{ 100, 1000 },
	75	{ 200, 1000 },
	76	{ 500, 1000 },
	77	/* seconds */
	78	{ 1, 1 },
	79	{ 2, 1 },
	80	{ 5, 1 },
	81	{ 10, 1 },
	82	{ 20, 1 },
	83	{ 50, 1 },
	84	{ 0, 0},
	85	};
	86
	87	static const struct sr_rational vdivs[] = {
	88	/* millivolts */
	89	{ 2, 1000 },
	90	{ 5, 1000 },
	91	{ 10, 1000 },
	92	{ 20, 1000 },
93	{ 50, 1000 },
94	{ 100, 1000 },
95	{ 200, 1000 },
96	{ 500, 1000 },
97	/* volts */
98	{ 1, 1 },
99	{ 2, 1 },
100	{ 5, 1 },
101	{ 10, 1 },
102	{ 0, 0 },
103	};
104
105	static const char *trigger_sources[] = {
106	"CH1",
107	"CH2",
108	"EXT",
109	"AC Line",
110	NULL,
111	};
112
113	static const char *coupling[] = {
114	"AC",
115	"DC",
116	"GND",
117	NULL,
118	};
119
512bb890 BV	120	static const char *supported_models[] = {
	121	"DS1052E",
	122	"DS1102E",
	123	"DS1052D",
	124	"DS1102D"
	125	};
	126
f4816ac6 ML	127	SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info;
	128	static struct sr_dev_driver *di = &rigol_ds1xx2_driver_info;
	129
	130	/* Properly close and free all devices. */
	131	static int clear_instances(void)
	132	{
	133	struct sr_dev_inst *sdi;
	134	struct drv_context *drvc;
	135	struct dev_context *devc;
	136	GSList *l;
	137
	138	if (!(drvc = di->priv))
	139	return SR_OK;
	140
	141	for (l = drvc->instances; l; l = l->next) {
	142	if (!(sdi = l->data))
	143	continue;
	144	if (!(devc = sdi->priv))
	145	continue;
	146
fb6e5ba8	147	g_free(devc->device);
e0b7d23c	148	close(devc->fd);
f4816ac6 ML	149
	150	sr_dev_inst_free(sdi);
	151	}
	152
	153	g_slist_free(drvc->instances);
	154	drvc->instances = NULL;
	155
	156	return SR_OK;
	157	}
	158
e0b7d23c	159	static int hw_init(struct sr_context *sr_ctx)
f4816ac6 ML	160	{
f4816ac6 ML	161	struct drv_context *drvc;
e0b7d23c	162	(void)sr_ctx;
f4816ac6 ML	163
	164	if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
	165	sr_err("Driver context malloc failed.");
	166	return SR_ERR_MALLOC;
	167	}
	168
f4816ac6 ML	169	di->priv = drvc;
	170
	171	return SR_OK;
	172	}
	173
	174	static GSList hw_scan(GSList options)
	175	{
	176	struct drv_context *drvc;
e0b7d23c ML	177	struct sr_dev_inst *sdi;
	178	struct dev_context *devc;
	179	struct sr_probe *probe;
f4816ac6	180	GSList *devices;
fb6e5ba8 ML	181	GDir *dir;
	182	const gchar *dev_name;
	183	const gchar *dev_dir = "/dev/";
	184	const gchar *prefix = "usbtmc";
	185	gchar *device;
	186	const gchar idn_query = "IDN?";
29d957ce	187	int len, num_tokens, fd, i;
fb6e5ba8 ML	188	const gchar *delimiter = ",";
fb6e5ba8 ML	189	gchar **tokens;
512bb890 BV	190	const char manufacturer, model, *version;
	191	int num_models;
	192	gboolean matched = FALSE;
fb6e5ba8 ML	193	char buf[256];
fb6e5ba8 ML	194
f4816ac6 ML	195	(void)options;
	196
	197	devices = NULL;
	198	drvc = di->priv;
	199	drvc->instances = NULL;
	200
fb6e5ba8	201	dir = g_dir_open("/sys/class/usb/", 0, NULL);
e0b7d23c	202
fb6e5ba8 ML	203	if (dir == NULL)
fb6e5ba8 ML	204	return NULL;
e0b7d23c	205
29d957ce	206	while ((dev_name = g_dir_read_name(dir)) != NULL) {
fb6e5ba8 ML	207	if (strncmp(dev_name, prefix, strlen(prefix)))
	208	continue;
	209
	210	device = g_strconcat(dev_dir, dev_name, NULL);
	211
	212	fd = open(device, O_RDWR);
	213	len = write(fd, idn_query, strlen(idn_query));
	214	len = read(fd, buf, sizeof(buf));
	215	close(fd);
29d957ce	216	if (len == 0) {
fb6e5ba8 ML	217	g_free(device);
	218	return NULL;
	219	}
	220
	221	buf[len] = 0;
	222	tokens = g_strsplit(buf, delimiter, 0);
	223	close(fd);
512bb890	224	sr_dbg("response: %s %d [%s]", device, len, buf);
fb6e5ba8 ML	225
	226	for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++);
	227
512bb890	228	if (num_tokens < 4) {
fb6e5ba8 ML	229	g_strfreev(tokens);
fb6e5ba8 ML	230	g_free(device);
e0b7d23c	231	return NULL;
fb6e5ba8	232	}
512bb890 BV	233
	234	manufacturer = tokens[0];
	235	model = tokens[1];
	236	version = tokens[3];
	237
	238	if (strcmp(manufacturer, "Rigol Technologies")) {
	239	g_strfreev(tokens);
	240	g_free(device);
	241	return NULL;
	242	}
	243
	244	num_models = sizeof(supported_models) / sizeof(supported_models[0]);
	245
	246	for (i = 0; i < num_models; i++) {
	247	if (!strcmp(model, supported_models[i])) {
	248	matched = 1;
	249	break;
	250	}
	251	}
	252
	253	if (!matched \|\| !(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE,
	254	manufacturer, model, version))) {
	255	g_strfreev(tokens);
	256	g_free(device);
	257	return NULL;
	258	}
	259
fb6e5ba8 ML	260	g_strfreev(tokens);
fb6e5ba8 ML	261
29d957ce UH	262	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
29d957ce UH	263	sr_err("Device context malloc failed.");
fb6e5ba8 ML	264	g_free(device);
	265	return NULL;
	266	}
	267
	268	devc->device = device;
	269
	270	sdi->priv = devc;
	271	sdi->driver = di;
	272
29d957ce UH	273	for (i = 0; i < 2; i++) {
	274	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE,
	275	i == 0 ? "CH1" : "CH2")))
fb6e5ba8 ML	276	return NULL;
	277	sdi->probes = g_slist_append(sdi->probes, probe);
	278	}
	279
	280	drvc->instances = g_slist_append(drvc->instances, sdi);
	281	devices = g_slist_append(devices, sdi);
e0b7d23c	282	}
fb6e5ba8 ML	283
fb6e5ba8 ML	284	g_dir_close(dir);
f4816ac6 ML	285
	286	return devices;
	287	}
	288
	289	static GSList *hw_dev_list(void)
	290	{
	291	struct drv_context *drvc;
	292
	293	drvc = di->priv;
	294
	295	return drvc->instances;
	296	}
	297
	298	static int hw_dev_open(struct sr_dev_inst *sdi)
	299	{
29d957ce UH	300	struct dev_context *devc;
29d957ce UH	301	int fd;
fb6e5ba8	302
29d957ce	303	devc = sdi->priv;
e0b7d23c	304
29d957ce	305	if ((fd = open(devc->device, O_RDWR)) == -1)
e0b7d23c ML	306	return SR_ERR;
e0b7d23c ML	307
e0b7d23c ML	308	devc->fd = fd;
	309
	310	devc->scale = 1;
f4816ac6 ML	311
	312	return SR_OK;
	313	}
	314
	315	static int hw_dev_close(struct sr_dev_inst *sdi)
	316	{
29d957ce UH	317	struct dev_context *devc;
	318
	319	devc = sdi->priv;
e0b7d23c ML	320
e0b7d23c ML	321	close(devc->fd);
f4816ac6 ML	322
	323	return SR_OK;
	324	}
	325
	326	static int hw_cleanup(void)
	327	{
	328	clear_instances();
	329
f4816ac6 ML	330	return SR_OK;
	331	}
	332
	333	static int hw_info_get(int info_id, const void **data,
	334	const struct sr_dev_inst *sdi)
	335	{
e0b7d23c ML	336	(void)sdi;
e0b7d23c ML	337
f4816ac6	338	switch (info_id) {
e0b7d23c ML	339	case SR_DI_HWCAPS:
	340	*data = hwcaps;
	341	break;
	342	case SR_DI_NUM_PROBES:
	343	*data = GINT_TO_POINTER(NUM_PROBES);
	344	break;
	345	case SR_DI_PROBE_NAMES:
	346	*data = probe_names;
	347	break;
	348	case SR_DI_TIMEBASES:
	349	*data = timebases;
	350	break;
	351	case SR_DI_TRIGGER_SOURCES:
	352	*data = trigger_sources;
	353	break;
	354	case SR_DI_VDIVS:
	355	*data = vdivs;
	356	break;
	357	case SR_DI_COUPLING:
	358	*data = coupling;
	359	break;
f4816ac6 ML	360	default:
	361	sr_err("Unknown info_id: %d.", info_id);
	362	return SR_ERR_ARG;
	363	}
	364
	365	return SR_OK;
	366	}
	367
	368	static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
	369	const void *value)
	370	{
29d957ce	371	struct dev_context *devc;
e0b7d23c ML	372	uint64_t tmp_u64;
	373	float tmp_float;
	374	struct sr_rational tmp_rat;
	375	int ret, i, j;
	376	char *channel;
f4816ac6	377
29d957ce UH	378	devc = sdi->priv;
29d957ce UH	379
f4816ac6 ML	380	if (sdi->status != SR_ST_ACTIVE) {
	381	sr_err("Device inactive, can't set config options.");
	382	return SR_ERR;
	383	}
	384
	385	ret = SR_OK;
	386	switch (hwcap) {
29d957ce	387	case SR_HWCAP_LIMIT_FRAMES:
e0b7d23c ML	388	devc->limit_frames = (const uint64_t )value;
	389	break;
	390	case SR_HWCAP_TRIGGER_SLOPE:
	391	tmp_u64 = (const int )value;
29d957ce UH	392	rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SLOP %s\n",
29d957ce UH	393	tmp_u64 ? "POS" : "NEG");
e0b7d23c ML	394	break;
	395	case SR_HWCAP_HORIZ_TRIGGERPOS:
	396	tmp_float = (const float )value;
542843f7	397	rigol_ds1xx2_send_data(devc->fd, ":TIM:OFFS %.9f\n", tmp_float);
e0b7d23c ML	398	break;
	399	case SR_HWCAP_TIMEBASE:
	400	tmp_rat = (const struct sr_rational )value;
29d957ce UH	401	rigol_ds1xx2_send_data(devc->fd, ":TIM:SCAL %.9f\n",
29d957ce UH	402	(float)tmp_rat.p / tmp_rat.q);
e0b7d23c ML	403	break;
	404	case SR_HWCAP_TRIGGER_SOURCE:
	405	if (!strcmp(value, "CH1"))
	406	channel = "CHAN1";
	407	else if (!strcmp(value, "CH2"))
	408	channel = "CHAN2";
	409	else if (!strcmp(value, "EXT"))
	410	channel = "EXT";
	411	else if (!strcmp(value, "AC Line"))
	412	channel = "ACL";
29d957ce	413	else {
e0b7d23c ML	414	ret = SR_ERR_ARG;
e0b7d23c ML	415	break;
4e108ace ML	416	}
4e108ace ML	417	rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SOUR %s\n", channel);
e0b7d23c ML	418	break;
	419	case SR_HWCAP_VDIV:
	420	/* TODO: Not supporting vdiv per channel yet. */
	421	tmp_rat = (const struct sr_rational )value;
	422	for (i = 0; vdivs[i].p && vdivs[i].q; i++) {
	423	if (vdivs[i].p == tmp_rat.p
	424	&& vdivs[i].q == tmp_rat.q) {
29d957ce	425	devc->scale = (float)tmp_rat.p / tmp_rat.q;
e0b7d23c	426	for (j = 0; j < 2; j++)
29d957ce UH	427	rigol_ds1xx2_send_data(devc->fd,
29d957ce UH	428	":CHAN%d:SCAL %.3f\n", j, devc->scale);
e0b7d23c ML	429	break;
	430	}
	431	}
	432	if (vdivs[i].p == 0 && vdivs[i].q == 0)
	433	ret = SR_ERR_ARG;
	434	break;
	435	case SR_HWCAP_COUPLING:
	436	/* TODO: Not supporting coupling per channel yet. */
	437	for (i = 0; coupling[i]; i++) {
	438	if (!strcmp(value, coupling[i])) {
	439	for (j = 0; j < 2; j++)
29d957ce UH	440	rigol_ds1xx2_send_data(devc->fd,
29d957ce UH	441	":CHAN%d:COUP %s\n", j, coupling[i]);
e0b7d23c ML	442	break;
	443	}
	444	}
	445	if (coupling[i] == 0)
	446	ret = SR_ERR_ARG;
	447	break;
f4816ac6 ML	448	default:
	449	sr_err("Unknown hardware capability: %d.", hwcap);
	450	ret = SR_ERR_ARG;
29d957ce	451	break;
f4816ac6 ML	452	}
	453
	454	return ret;
	455	}
	456
	457	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
	458	void *cb_data)
	459	{
29d957ce	460	struct dev_context *devc;
e0b7d23c ML	461	struct sr_datafeed_packet packet;
	462	struct sr_datafeed_header header;
	463	struct sr_datafeed_meta_analog meta;
	464	char buf[256];
	465	int len;
29d957ce	466
e0b7d23c ML	467	(void)cb_data;
e0b7d23c ML	468
29d957ce UH	469	devc = sdi->priv;
29d957ce UH	470
e0b7d23c ML	471	devc->num_frames = 0;
	472
	473	sr_source_add(devc->fd, G_IO_IN, 50, rigol_ds1xx2_receive_data, (void *)sdi);
	474
	475	/* Send header packet to the session bus. */
	476	packet.type = SR_DF_HEADER;
	477	packet.payload = (unsigned char *)&header;
	478	header.feed_version = 1;
	479	gettimeofday(&header.starttime, NULL);
	480	sr_session_send(cb_data, &packet);
	481
	482	/* Send metadata about the SR_DF_ANALOG packets to come. */
	483	packet.type = SR_DF_META_ANALOG;
	484	packet.payload = &meta;
	485	meta.num_probes = NUM_PROBES;
	486	sr_session_send(cb_data, &packet);
	487
	488	rigol_ds1xx2_send_data(devc->fd, ":CHAN1:SCAL?\n");
	489	len = read(devc->fd, buf, sizeof(buf));
	490	buf[len] = 0;
	491	devc->scale = atof(buf);
29d957ce	492	sr_dbg("Scale is %.3f.", devc->scale);
e0b7d23c ML	493	rigol_ds1xx2_send_data(devc->fd, ":CHAN1:OFFS?\n");
	494	len = read(devc->fd, buf, sizeof(buf));
	495	buf[len] = 0;
	496	devc->offset = atof(buf);
29d957ce	497	sr_dbg("Offset is %.6f.", devc->offset);
e0b7d23c	498	rigol_ds1xx2_send_data(devc->fd, ":WAV:DATA?\n");
f4816ac6 ML	499
	500	return SR_OK;
	501	}
	502
	503	static int hw_dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	504	{
29d957ce UH	505	struct dev_context *devc;
29d957ce UH	506
f4816ac6 ML	507	(void)cb_data;
f4816ac6 ML	508
29d957ce UH	509	devc = sdi->priv;
29d957ce UH	510
f4816ac6 ML	511	if (sdi->status != SR_ST_ACTIVE) {
	512	sr_err("Device inactive, can't stop acquisition.");
	513	return SR_ERR;
	514	}
	515
e0b7d23c	516	sr_source_remove(devc->fd);
f4816ac6 ML	517
	518	return SR_OK;
	519	}
	520
	521	SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info = {
	522	.name = "rigol-ds1xx2",
	523	.longname = "Rigol DS1xx2",
	524	.api_version = 1,
	525	.init = hw_init,
	526	.cleanup = hw_cleanup,
	527	.scan = hw_scan,
	528	.dev_list = hw_dev_list,
	529	.dev_clear = clear_instances,
	530	.dev_open = hw_dev_open,
	531	.dev_close = hw_dev_close,
	532	.info_get = hw_info_get,
	533	.dev_config_set = hw_dev_config_set,
	534	.dev_acquisition_start = hw_dev_acquisition_start,
	535	.dev_acquisition_stop = hw_dev_acquisition_stop,
	536	.priv = NULL,
	537	};