[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 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_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:
		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
e0b7d23c ML	43	static const struct sr_rational timebases[] = {
	44	/* nanoseconds */
	45	{ 2, 1000000000 },
	46	{ 5, 1000000000 },
	47	{ 10, 1000000000 },
	48	{ 20, 1000000000 },
	49	{ 50, 1000000000 },
	50	{ 100, 1000000000 },
	51	{ 500, 1000000000 },
	52	/* microseconds */
	53	{ 1, 1000000 },
	54	{ 2, 1000000 },
	55	{ 5, 1000000 },
	56	{ 10, 1000000 },
	57	{ 20, 1000000 },
	58	{ 50, 1000000 },
	59	{ 100, 1000000 },
	60	{ 200, 1000000 },
	61	{ 500, 1000000 },
	62	/* milliseconds */
	63	{ 1, 1000 },
	64	{ 2, 1000 },
	65	{ 5, 1000 },
	66	{ 10, 1000 },
	67	{ 20, 1000 },
	68	{ 50, 1000 },
	69	{ 100, 1000 },
	70	{ 200, 1000 },
	71	{ 500, 1000 },
	72	/* seconds */
	73	{ 1, 1 },
	74	{ 2, 1 },
	75	{ 5, 1 },
	76	{ 10, 1 },
	77	{ 20, 1 },
	78	{ 50, 1 },
	79	{ 0, 0},
	80	};
	81
	82	static const struct sr_rational vdivs[] = {
	83	/* millivolts */
	84	{ 2, 1000 },
	85	{ 5, 1000 },
	86	{ 10, 1000 },
	87	{ 20, 1000 },
	88	{ 50, 1000 },
	89	{ 100, 1000 },
	90	{ 200, 1000 },
	91	{ 500, 1000 },
	92	/* volts */
	93	{ 1, 1 },
	94	{ 2, 1 },
	95	{ 5, 1 },
	96	{ 10, 1 },
	97	{ 0, 0 },
	98	};
	99
	100	static const char *trigger_sources[] = {
	101	"CH1",
	102	"CH2",
	103	"EXT",
	104	"AC Line",
	105	NULL,
	106	};
107
108	static const char *coupling[] = {
109	"AC",
110	"DC",
111	"GND",
112	NULL,
113	};
114
512bb890 BV	115	static const char *supported_models[] = {
	116	"DS1052E",
	117	"DS1102E",
	118	"DS1052D",
	119	"DS1102D"
	120	};
	121
f4816ac6 ML	122	SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info;
	123	static struct sr_dev_driver *di = &rigol_ds1xx2_driver_info;
	124
	125	/* Properly close and free all devices. */
	126	static int clear_instances(void)
	127	{
	128	struct sr_dev_inst *sdi;
	129	struct drv_context *drvc;
	130	struct dev_context *devc;
	131	GSList *l;
	132
	133	if (!(drvc = di->priv))
	134	return SR_OK;
	135
	136	for (l = drvc->instances; l; l = l->next) {
	137	if (!(sdi = l->data))
	138	continue;
	139	if (!(devc = sdi->priv))
	140	continue;
	141
fb6e5ba8	142	g_free(devc->device);
e0b7d23c	143	close(devc->fd);
f4816ac6 ML	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
e0b7d23c	154	static int hw_init(struct sr_context *sr_ctx)
f4816ac6 ML	155	{
f4816ac6 ML	156	struct drv_context *drvc;
e0b7d23c	157	(void)sr_ctx;
f4816ac6 ML	158
	159	if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
	160	sr_err("Driver context malloc failed.");
	161	return SR_ERR_MALLOC;
	162	}
	163
f4816ac6 ML	164	di->priv = drvc;
	165
	166	return SR_OK;
	167	}
	168
	169	static GSList hw_scan(GSList options)
	170	{
	171	struct drv_context *drvc;
e0b7d23c ML	172	struct sr_dev_inst *sdi;
	173	struct dev_context *devc;
	174	struct sr_probe *probe;
f4816ac6	175	GSList *devices;
fb6e5ba8 ML	176	GDir *dir;
	177	const gchar *dev_name;
	178	const gchar *dev_dir = "/dev/";
	179	const gchar *prefix = "usbtmc";
	180	gchar *device;
	181	const gchar idn_query = "IDN?";
29d957ce	182	int len, num_tokens, fd, i;
fb6e5ba8 ML	183	const gchar *delimiter = ",";
fb6e5ba8 ML	184	gchar **tokens;
512bb890 BV	185	const char manufacturer, model, *version;
	186	int num_models;
	187	gboolean matched = FALSE;
fb6e5ba8 ML	188	char buf[256];
fb6e5ba8 ML	189
f4816ac6 ML	190	(void)options;
	191
	192	devices = NULL;
	193	drvc = di->priv;
	194	drvc->instances = NULL;
	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
	328	static int hw_info_get(int info_id, const void **data,
	329	const struct sr_dev_inst *sdi)
	330	{
e0b7d23c ML	331	(void)sdi;
e0b7d23c ML	332
f4816ac6	333	switch (info_id) {
e0b7d23c ML	334	case SR_DI_HWCAPS:
	335	*data = hwcaps;
	336	break;
e0b7d23c ML	337	case SR_DI_TIMEBASES:
	338	*data = timebases;
	339	break;
	340	case SR_DI_TRIGGER_SOURCES:
	341	*data = trigger_sources;
	342	break;
	343	case SR_DI_VDIVS:
	344	*data = vdivs;
	345	break;
	346	case SR_DI_COUPLING:
	347	*data = coupling;
	348	break;
f4816ac6	349	default:
f4816ac6 ML	350	return SR_ERR_ARG;
	351	}
	352
	353	return SR_OK;
	354	}
	355
	356	static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
	357	const void *value)
	358	{
29d957ce	359	struct dev_context *devc;
e0b7d23c ML	360	uint64_t tmp_u64;
	361	float tmp_float;
	362	struct sr_rational tmp_rat;
	363	int ret, i, j;
	364	char *channel;
f4816ac6	365
29d957ce UH	366	devc = sdi->priv;
29d957ce UH	367
f4816ac6 ML	368	if (sdi->status != SR_ST_ACTIVE) {
	369	sr_err("Device inactive, can't set config options.");
	370	return SR_ERR;
	371	}
	372
	373	ret = SR_OK;
	374	switch (hwcap) {
29d957ce	375	case SR_HWCAP_LIMIT_FRAMES:
e0b7d23c ML	376	devc->limit_frames = (const uint64_t )value;
	377	break;
	378	case SR_HWCAP_TRIGGER_SLOPE:
	379	tmp_u64 = (const int )value;
29d957ce UH	380	rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SLOP %s\n",
29d957ce UH	381	tmp_u64 ? "POS" : "NEG");
e0b7d23c ML	382	break;
	383	case SR_HWCAP_HORIZ_TRIGGERPOS:
	384	tmp_float = (const float )value;
542843f7	385	rigol_ds1xx2_send_data(devc->fd, ":TIM:OFFS %.9f\n", tmp_float);
e0b7d23c ML	386	break;
	387	case SR_HWCAP_TIMEBASE:
	388	tmp_rat = (const struct sr_rational )value;
29d957ce UH	389	rigol_ds1xx2_send_data(devc->fd, ":TIM:SCAL %.9f\n",
29d957ce UH	390	(float)tmp_rat.p / tmp_rat.q);
e0b7d23c ML	391	break;
	392	case SR_HWCAP_TRIGGER_SOURCE:
	393	if (!strcmp(value, "CH1"))
	394	channel = "CHAN1";
	395	else if (!strcmp(value, "CH2"))
	396	channel = "CHAN2";
	397	else if (!strcmp(value, "EXT"))
	398	channel = "EXT";
	399	else if (!strcmp(value, "AC Line"))
	400	channel = "ACL";
29d957ce	401	else {
e0b7d23c ML	402	ret = SR_ERR_ARG;
e0b7d23c ML	403	break;
4e108ace ML	404	}
4e108ace ML	405	rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SOUR %s\n", channel);
e0b7d23c ML	406	break;
	407	case SR_HWCAP_VDIV:
	408	/* TODO: Not supporting vdiv per channel yet. */
	409	tmp_rat = (const struct sr_rational )value;
	410	for (i = 0; vdivs[i].p && vdivs[i].q; i++) {
	411	if (vdivs[i].p == tmp_rat.p
	412	&& vdivs[i].q == tmp_rat.q) {
29d957ce	413	devc->scale = (float)tmp_rat.p / tmp_rat.q;
e0b7d23c	414	for (j = 0; j < 2; j++)
29d957ce UH	415	rigol_ds1xx2_send_data(devc->fd,
29d957ce UH	416	":CHAN%d:SCAL %.3f\n", j, devc->scale);
e0b7d23c ML	417	break;
	418	}
	419	}
	420	if (vdivs[i].p == 0 && vdivs[i].q == 0)
	421	ret = SR_ERR_ARG;
	422	break;
	423	case SR_HWCAP_COUPLING:
	424	/* TODO: Not supporting coupling per channel yet. */
	425	for (i = 0; coupling[i]; i++) {
	426	if (!strcmp(value, coupling[i])) {
	427	for (j = 0; j < 2; j++)
29d957ce UH	428	rigol_ds1xx2_send_data(devc->fd,
29d957ce UH	429	":CHAN%d:COUP %s\n", j, coupling[i]);
e0b7d23c ML	430	break;
	431	}
	432	}
	433	if (coupling[i] == 0)
	434	ret = SR_ERR_ARG;
	435	break;
f4816ac6 ML	436	default:
	437	sr_err("Unknown hardware capability: %d.", hwcap);
	438	ret = SR_ERR_ARG;
29d957ce	439	break;
f4816ac6 ML	440	}
	441
	442	return ret;
	443	}
	444
	445	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
	446	void *cb_data)
	447	{
29d957ce	448	struct dev_context *devc;
e0b7d23c ML	449	struct sr_datafeed_packet packet;
	450	struct sr_datafeed_header header;
	451	struct sr_datafeed_meta_analog meta;
	452	char buf[256];
	453	int len;
29d957ce	454
e0b7d23c ML	455	(void)cb_data;
e0b7d23c ML	456
29d957ce UH	457	devc = sdi->priv;
29d957ce UH	458
e0b7d23c ML	459	devc->num_frames = 0;
	460
	461	sr_source_add(devc->fd, G_IO_IN, 50, rigol_ds1xx2_receive_data, (void *)sdi);
	462
	463	/* Send header packet to the session bus. */
	464	packet.type = SR_DF_HEADER;
	465	packet.payload = (unsigned char *)&header;
	466	header.feed_version = 1;
	467	gettimeofday(&header.starttime, NULL);
	468	sr_session_send(cb_data, &packet);
	469
	470	/* Send metadata about the SR_DF_ANALOG packets to come. */
	471	packet.type = SR_DF_META_ANALOG;
	472	packet.payload = &meta;
	473	meta.num_probes = NUM_PROBES;
	474	sr_session_send(cb_data, &packet);
	475
	476	rigol_ds1xx2_send_data(devc->fd, ":CHAN1:SCAL?\n");
	477	len = read(devc->fd, buf, sizeof(buf));
	478	buf[len] = 0;
	479	devc->scale = atof(buf);
29d957ce	480	sr_dbg("Scale is %.3f.", devc->scale);
e0b7d23c ML	481	rigol_ds1xx2_send_data(devc->fd, ":CHAN1:OFFS?\n");
	482	len = read(devc->fd, buf, sizeof(buf));
	483	buf[len] = 0;
	484	devc->offset = atof(buf);
29d957ce	485	sr_dbg("Offset is %.6f.", devc->offset);
e0b7d23c	486	rigol_ds1xx2_send_data(devc->fd, ":WAV:DATA?\n");
f4816ac6 ML	487
	488	return SR_OK;
	489	}
	490
	491	static int hw_dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	492	{
29d957ce UH	493	struct dev_context *devc;
29d957ce UH	494
f4816ac6 ML	495	(void)cb_data;
f4816ac6 ML	496
29d957ce UH	497	devc = sdi->priv;
29d957ce UH	498
f4816ac6 ML	499	if (sdi->status != SR_ST_ACTIVE) {
	500	sr_err("Device inactive, can't stop acquisition.");
	501	return SR_ERR;
	502	}
	503
e0b7d23c	504	sr_source_remove(devc->fd);
f4816ac6 ML	505
	506	return SR_OK;
	507	}
	508
	509	SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info = {
	510	.name = "rigol-ds1xx2",
	511	.longname = "Rigol DS1xx2",
	512	.api_version = 1,
	513	.init = hw_init,
	514	.cleanup = hw_cleanup,
	515	.scan = hw_scan,
	516	.dev_list = hw_dev_list,
	517	.dev_clear = clear_instances,
	518	.dev_open = hw_dev_open,
	519	.dev_close = hw_dev_close,
	520	.info_get = hw_info_get,
	521	.dev_config_set = hw_dev_config_set,
	522	.dev_acquisition_start = hw_dev_acquisition_start,
	523	.dev_acquisition_stop = hw_dev_acquisition_stop,
	524	.priv = NULL,
	525	};