[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_free(devc->coupling[0]);
		g_free(devc->coupling[1]);
		g_free(devc->trigger_source);
		g_free(devc->trigger_slope);
		close(devc->fd);

		sr_dev_inst_free(sdi);
	}

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

	return SR_OK;
}

static int set_cfg(const struct sr_dev_inst *sdi, const char *format, ...)
{
	struct dev_context *devc;
	va_list args;
	char buf[256];

	devc = sdi->priv;

	va_start(args, format);
	vsnprintf(buf, 255, format, args);
	va_end(args);
	if (rigol_ds1xx2_send(devc, buf) != SR_OK)
		return SR_ERR;

	/* When setting a bunch of parameters in a row, the DS1052E scrambles
	 * some of them unless there is at least 100ms delay in between. */
	sr_spew("delay %dms", 100);
	g_usleep(100);

	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->limit_frames = 0;
		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;

	if (rigol_ds1xx2_get_dev_cfg(sdi) != SR_OK)
		/* TODO: force configuration? */
		return SR_ERR;

	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 t_dbl;
	unsigned int i;
	int ret;
	const char *tmp_str;

	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);
		if (tmp_u64 != 0 && tmp_u64 != 1)
			return SR_ERR;
		g_free(devc->trigger_slope);
		devc->trigger_slope = g_strdup(tmp_u64 ? "POS" : "NEG");
		ret = set_cfg(sdi, ":TRIG:EDGE:SLOP %s", devc->trigger_slope);
		break;
	case SR_CONF_HORIZ_TRIGGERPOS:
		t_dbl = g_variant_get_double(data);
		if (t_dbl < 0.0 || t_dbl > 1.0)
			return SR_ERR;
		devc->horiz_triggerpos = t_dbl;
		/* We have the trigger offset as a percentage of the frame, but
		 * need to express this in seconds. */
		t_dbl = -(devc->horiz_triggerpos - 0.5) * devc->timebase * NUM_TIMEBASE;
		ret = set_cfg(sdi, ":TIM:OFFS %.6f", t_dbl);
		break;
	case SR_CONF_TIMEBASE:
		g_variant_get(data, "(tt)", &p, &q);
		for (i = 0; i < ARRAY_SIZE(timebases); i++) {
			if (timebases[i][0] == p && timebases[i][1] == q) {
				devc->timebase = (float)p / q;
				ret = set_cfg(sdi, ":TIM:SCAL %.9f", devc->timebase);
				break;
			}
		}
		if (i == ARRAY_SIZE(timebases))
			ret = SR_ERR_ARG;
		break;
	case SR_CONF_TRIGGER_SOURCE:
		tmp_str = g_variant_get_string(data, NULL);
		for (i = 0; i < ARRAY_SIZE(trigger_sources); i++) {
			if (!strcmp(trigger_sources[i], tmp_str)) {
				g_free(devc->trigger_source);
				devc->trigger_source = g_strdup(trigger_sources[i]);
				if (!strcmp(devc->trigger_source, "AC Line"))
					tmp_str = "ACL";
				else if (!strcmp(devc->trigger_source, "CH1"))
					tmp_str = "CHAN1";
				else if (!strcmp(devc->trigger_source, "CH2"))
					tmp_str = "CHAN2";
				else
					tmp_str = (char *)devc->trigger_source;
				ret = set_cfg(sdi, ":TRIG:EDGE:SOUR %s", tmp_str);
				break;
			}
		}
		if (i == ARRAY_SIZE(trigger_sources))
			ret = SR_ERR_ARG;
		break;
	case SR_CONF_VDIV:
		g_variant_get(data, "(tt)", &p, &q);
		for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
			if (vdivs[i][0] != p || vdivs[i][1] != q)
				continue;
			devc->vdiv[0] = devc->vdiv[1] = (float)p / q;
			set_cfg(sdi, ":CHAN1:SCAL %.3f", devc->vdiv[0]);
			ret = set_cfg(sdi, ":CHAN2:SCAL %.3f", devc->vdiv[1]);
			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])) {
				g_free(devc->coupling[0]);
				g_free(devc->coupling[1]);
				devc->coupling[0] = g_strdup(coupling[i]);
				devc->coupling[1] = g_strdup(coupling[i]);
				set_cfg(sdi, ":CHAN1:COUP %s", devc->coupling[0]);
				ret = set_cfg(sdi, ":CHAN2:COUP %s", devc->coupling[1]);
				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 dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
{
	struct dev_context *devc;
	struct sr_probe *probe;
	GSList *l;
	int probenum;
	char cmd[256];

	(void)cb_data;

	devc = sdi->priv;

	for (l = sdi->probes; l; l = l->next) {
		probe = l->data;
		probenum = probe->name[2] == '1' ? 0 : 1;
		if (probe->enabled)
			devc->enabled_probes = g_slist_append(devc->enabled_probes, probe);

		if (probe->enabled != devc->channels[probenum]) {
			/* Enabled channel is currently disabled, or vice versa. */
			sprintf(cmd, ":CHAN%d:DISP %s", probenum + 1,
					probe->enabled ? "ON" : "OFF");
			if (rigol_ds1xx2_send(devc, cmd) != SR_OK)
				return SR_ERR;
		}
	}
	if (!devc->enabled_probes)
		return SR_ERR;

	sr_source_add(devc->fd, G_IO_IN, 50, rigol_ds1xx2_receive, (void *)sdi);

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

	/* Fetch the first frame. */
	devc->channel_frame = devc->enabled_probes->data;
	if (rigol_ds1xx2_send(devc, ":WAV:DATA? CHAN%c",
			devc->channel_frame->name[2]) != SR_OK)
		return SR_ERR;

	return SR_OK;
}

static int 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;
	}

	g_slist_free(devc->enabled_probes);
	devc->enabled_probes = NULL;
	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 = dev_acquisition_start,
	.dev_acquisition_stop = 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>
88e429c9	5	* Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
f4816ac6 ML	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
e0b7d23c ML	21	#include <fcntl.h>
	22	#include <unistd.h>
	23	#include <stdlib.h>
	24	#include <string.h>
f4816ac6 ML	25	#include <glib.h>
	26	#include "libsigrok.h"
	27	#include "libsigrok-internal.h"
	28	#include "protocol.h"
	29
d62d7ad1 BV	30	#define NUM_TIMEBASE 12
	31	#define NUM_VDIV 8
	32
f6a0ac9f	33	static const int32_t hwcaps[] = {
1953564a BV	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,
d62d7ad1 BV	42	SR_CONF_NUM_TIMEBASE,
d62d7ad1 BV	43	SR_CONF_NUM_VDIV,
e0b7d23c ML	44	};
e0b7d23c ML	45
f6a0ac9f	46	static const uint64_t timebases[][2] = {
e0b7d23c ML	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 },
e0b7d23c ML	82	};
e0b7d23c ML	83
f6a0ac9f	84	static const uint64_t vdivs[][2] = {
e0b7d23c ML	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 },
e0b7d23c ML	99	};
	100
	101	static const char *trigger_sources[] = {
	102	"CH1",
	103	"CH2",
	104	"EXT",
	105	"AC Line",
e0b7d23c ML	106	};
	107
	108	static const char *coupling[] = {
	109	"AC",
	110	"DC",
	111	"GND",
e0b7d23c ML	112	};
e0b7d23c ML	113
512bb890 BV	114	static const char *supported_models[] = {
	115	"DS1052E",
	116	"DS1102E",
	117	"DS1052D",
333bf022	118	"DS1102D",
512bb890 BV	119	};
512bb890 BV	120
f4816ac6 ML	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
fb6e5ba8	141	g_free(devc->device);
254dd102 BV	142	g_free(devc->coupling[0]);
	143	g_free(devc->coupling[1]);
	144	g_free(devc->trigger_source);
	145	g_free(devc->trigger_slope);
e0b7d23c	146	close(devc->fd);
f4816ac6 ML	147
	148	sr_dev_inst_free(sdi);
	149	}
	150
	151	g_slist_free(drvc->instances);
	152	drvc->instances = NULL;
	153
	154	return SR_OK;
	155	}
	156
254dd102 BV	157	static int set_cfg(const struct sr_dev_inst sdi, const char format, ...)
	158	{
	159	struct dev_context *devc;
254dd102 BV	160	va_list args;
	161	char buf[256];
	162
	163	devc = sdi->priv;
	164
	165	va_start(args, format);
	166	vsnprintf(buf, 255, format, args);
	167	va_end(args);
	168	if (rigol_ds1xx2_send(devc, buf) != SR_OK)
	169	return SR_ERR;
	170
	171	/* When setting a bunch of parameters in a row, the DS1052E scrambles
	172	* some of them unless there is at least 100ms delay in between. */
8f35be72 BV	173	sr_spew("delay %dms", 100);
8f35be72 BV	174	g_usleep(100);
254dd102 BV	175
	176	return SR_OK;
	177	}
	178
e0b7d23c	179	static int hw_init(struct sr_context *sr_ctx)
f4816ac6	180	{
063e7aef	181	return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN);
f4816ac6 ML	182	}
	183
	184	static GSList hw_scan(GSList options)
	185	{
	186	struct drv_context *drvc;
e0b7d23c ML	187	struct sr_dev_inst *sdi;
	188	struct dev_context *devc;
	189	struct sr_probe *probe;
f4816ac6	190	GSList *devices;
fb6e5ba8 ML	191	GDir *dir;
	192	const gchar *dev_name;
	193	const gchar *dev_dir = "/dev/";
	194	const gchar *prefix = "usbtmc";
	195	gchar *device;
	196	const gchar idn_query = "IDN?";
f6a0ac9f BV	197	unsigned int i;
f6a0ac9f BV	198	int len, num_tokens, fd;
fb6e5ba8 ML	199	const gchar *delimiter = ",";
fb6e5ba8 ML	200	gchar **tokens;
512bb890	201	const char manufacturer, model, *version;
512bb890	202	gboolean matched = FALSE;
fb6e5ba8 ML	203	char buf[256];
fb6e5ba8 ML	204
f4816ac6 ML	205	(void)options;
f4816ac6 ML	206
f4816ac6 ML	207	drvc = di->priv;
	208	drvc->instances = NULL;
	209
4b97c74e UH	210	devices = NULL;
4b97c74e UH	211
fb6e5ba8	212	dir = g_dir_open("/sys/class/usb/", 0, NULL);
e0b7d23c	213
fb6e5ba8 ML	214	if (dir == NULL)
fb6e5ba8 ML	215	return NULL;
e0b7d23c	216
29d957ce	217	while ((dev_name = g_dir_read_name(dir)) != NULL) {
fb6e5ba8 ML	218	if (strncmp(dev_name, prefix, strlen(prefix)))
	219	continue;
	220
	221	device = g_strconcat(dev_dir, dev_name, NULL);
	222
	223	fd = open(device, O_RDWR);
	224	len = write(fd, idn_query, strlen(idn_query));
	225	len = read(fd, buf, sizeof(buf));
	226	close(fd);
29d957ce	227	if (len == 0) {
fb6e5ba8 ML	228	g_free(device);
	229	return NULL;
	230	}
	231
	232	buf[len] = 0;
	233	tokens = g_strsplit(buf, delimiter, 0);
	234	close(fd);
512bb890	235	sr_dbg("response: %s %d [%s]", device, len, buf);
fb6e5ba8 ML	236
	237	for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++);
	238
512bb890	239	if (num_tokens < 4) {
fb6e5ba8 ML	240	g_strfreev(tokens);
fb6e5ba8 ML	241	g_free(device);
e0b7d23c	242	return NULL;
fb6e5ba8	243	}
512bb890 BV	244
	245	manufacturer = tokens[0];
	246	model = tokens[1];
	247	version = tokens[3];
	248
	249	if (strcmp(manufacturer, "Rigol Technologies")) {
	250	g_strfreev(tokens);
	251	g_free(device);
	252	return NULL;
	253	}
	254
333bf022	255	for (i = 0; i < ARRAY_SIZE(supported_models); i++) {
512bb890 BV	256	if (!strcmp(model, supported_models[i])) {
	257	matched = 1;
	258	break;
	259	}
	260	}
	261
	262	if (!matched \|\| !(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE,
	263	manufacturer, model, version))) {
	264	g_strfreev(tokens);
	265	g_free(device);
	266	return NULL;
	267	}
	268
fb6e5ba8 ML	269	g_strfreev(tokens);
fb6e5ba8 ML	270
29d957ce UH	271	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
29d957ce UH	272	sr_err("Device context malloc failed.");
fb6e5ba8 ML	273	g_free(device);
	274	return NULL;
	275	}
254dd102	276	devc->limit_frames = 0;
fb6e5ba8	277	devc->device = device;
fb6e5ba8 ML	278	sdi->priv = devc;
	279	sdi->driver = di;
	280
29d957ce UH	281	for (i = 0; i < 2; i++) {
	282	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE,
	283	i == 0 ? "CH1" : "CH2")))
fb6e5ba8 ML	284	return NULL;
	285	sdi->probes = g_slist_append(sdi->probes, probe);
	286	}
	287
	288	drvc->instances = g_slist_append(drvc->instances, sdi);
	289	devices = g_slist_append(devices, sdi);
e0b7d23c	290	}
fb6e5ba8 ML	291
fb6e5ba8 ML	292	g_dir_close(dir);
f4816ac6 ML	293
	294	return devices;
	295	}
	296
	297	static GSList *hw_dev_list(void)
	298	{
0e94d524	299	return ((struct drv_context *)(di->priv))->instances;
f4816ac6 ML	300	}
	301
	302	static int hw_dev_open(struct sr_dev_inst *sdi)
	303	{
29d957ce UH	304	struct dev_context *devc;
29d957ce UH	305	int fd;
fb6e5ba8	306
29d957ce	307	devc = sdi->priv;
e0b7d23c	308
29d957ce	309	if ((fd = open(devc->device, O_RDWR)) == -1)
e0b7d23c	310	return SR_ERR;
e0b7d23c ML	311	devc->fd = fd;
e0b7d23c ML	312
254dd102 BV	313	if (rigol_ds1xx2_get_dev_cfg(sdi) != SR_OK)
	314	/* TODO: force configuration? */
	315	return SR_ERR;
f4816ac6 ML	316
	317	return SR_OK;
	318	}
	319
	320	static int hw_dev_close(struct sr_dev_inst *sdi)
	321	{
29d957ce UH	322	struct dev_context *devc;
	323
	324	devc = sdi->priv;
e0b7d23c ML	325
e0b7d23c ML	326	close(devc->fd);
f4816ac6 ML	327
	328	return SR_OK;
	329	}
	330
	331	static int hw_cleanup(void)
	332	{
	333	clear_instances();
	334
f4816ac6 ML	335	return SR_OK;
	336	}
	337
d62d7ad1 BV	338	static int config_get(int id, GVariant *data, const struct sr_dev_inst sdi)
	339	{
	340
	341	(void)sdi;
	342
	343	switch (id) {
	344	case SR_CONF_NUM_TIMEBASE:
	345	*data = g_variant_new_int32(NUM_TIMEBASE);
	346	break;
	347	case SR_CONF_NUM_VDIV:
	348	*data = g_variant_new_int32(NUM_VDIV);
	349	break;
	350	default:
	351	return SR_ERR_ARG;
	352	}
	353
	354	return SR_OK;
	355	}
	356
f6a0ac9f	357	static int config_set(int id, GVariant data, const struct sr_dev_inst sdi)
f4816ac6	358	{
29d957ce	359	struct dev_context *devc;
f6a0ac9f	360	uint64_t tmp_u64, p, q;
254dd102	361	double t_dbl;
f6a0ac9f	362	unsigned int i;
254dd102 BV	363	int ret;
254dd102 BV	364	const char *tmp_str;
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;
035a1078	374	switch (id) {
1953564a	375	case SR_CONF_LIMIT_FRAMES:
f6a0ac9f	376	devc->limit_frames = g_variant_get_uint64(data);
e0b7d23c	377	break;
1953564a	378	case SR_CONF_TRIGGER_SLOPE:
f6a0ac9f	379	tmp_u64 = g_variant_get_uint64(data);
254dd102 BV	380	if (tmp_u64 != 0 && tmp_u64 != 1)
	381	return SR_ERR;
	382	g_free(devc->trigger_slope);
	383	devc->trigger_slope = g_strdup(tmp_u64 ? "POS" : "NEG");
	384	ret = set_cfg(sdi, ":TRIG:EDGE:SLOP %s", devc->trigger_slope);
e0b7d23c	385	break;
1953564a	386	case SR_CONF_HORIZ_TRIGGERPOS:
254dd102 BV	387	t_dbl = g_variant_get_double(data);
	388	if (t_dbl < 0.0 \|\| t_dbl > 1.0)
	389	return SR_ERR;
	390	devc->horiz_triggerpos = t_dbl;
	391	/* We have the trigger offset as a percentage of the frame, but
	392	* need to express this in seconds. */
	393	t_dbl = -(devc->horiz_triggerpos - 0.5) * devc->timebase * NUM_TIMEBASE;
	394	ret = set_cfg(sdi, ":TIM:OFFS %.6f", t_dbl);
e0b7d23c	395	break;
1953564a	396	case SR_CONF_TIMEBASE:
f6a0ac9f	397	g_variant_get(data, "(tt)", &p, &q);
f6a0ac9f BV	398	for (i = 0; i < ARRAY_SIZE(timebases); i++) {
f6a0ac9f BV	399	if (timebases[i][0] == p && timebases[i][1] == q) {
254dd102 BV	400	devc->timebase = (float)p / q;
254dd102 BV	401	ret = set_cfg(sdi, ":TIM:SCAL %.9f", devc->timebase);
f6a0ac9f BV	402	break;
	403	}
	404	}
254dd102 BV	405	if (i == ARRAY_SIZE(timebases))
254dd102 BV	406	ret = SR_ERR_ARG;
e0b7d23c	407	break;
1953564a	408	case SR_CONF_TRIGGER_SOURCE:
f6a0ac9f	409	tmp_str = g_variant_get_string(data, NULL);
254dd102 BV	410	for (i = 0; i < ARRAY_SIZE(trigger_sources); i++) {
	411	if (!strcmp(trigger_sources[i], tmp_str)) {
	412	g_free(devc->trigger_source);
	413	devc->trigger_source = g_strdup(trigger_sources[i]);
	414	if (!strcmp(devc->trigger_source, "AC Line"))
	415	tmp_str = "ACL";
	416	else if (!strcmp(devc->trigger_source, "CH1"))
	417	tmp_str = "CHAN1";
	418	else if (!strcmp(devc->trigger_source, "CH2"))
	419	tmp_str = "CHAN2";
	420	else
	421	tmp_str = (char *)devc->trigger_source;
	422	ret = set_cfg(sdi, ":TRIG:EDGE:SOUR %s", tmp_str);
	423	break;
	424	}
4e108ace	425	}
254dd102 BV	426	if (i == ARRAY_SIZE(trigger_sources))
254dd102 BV	427	ret = SR_ERR_ARG;
e0b7d23c	428	break;
1953564a	429	case SR_CONF_VDIV:
f6a0ac9f	430	g_variant_get(data, "(tt)", &p, &q);
f6a0ac9f BV	431	for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
	432	if (vdivs[i][0] != p \|\| vdivs[i][1] != q)
	433	continue;
254dd102 BV	434	devc->vdiv[0] = devc->vdiv[1] = (float)p / q;
	435	set_cfg(sdi, ":CHAN1:SCAL %.3f", devc->vdiv[0]);
	436	ret = set_cfg(sdi, ":CHAN2:SCAL %.3f", devc->vdiv[1]);
f6a0ac9f	437	break;
e0b7d23c	438	}
f6a0ac9f	439	if (i == ARRAY_SIZE(vdivs))
e0b7d23c ML	440	ret = SR_ERR_ARG;
e0b7d23c ML	441	break;
1953564a	442	case SR_CONF_COUPLING:
e0b7d23c	443	/* TODO: Not supporting coupling per channel yet. */
f6a0ac9f BV	444	tmp_str = g_variant_get_string(data, NULL);
	445	for (i = 0; i < ARRAY_SIZE(coupling); i++) {
	446	if (!strcmp(tmp_str, coupling[i])) {
254dd102 BV	447	g_free(devc->coupling[0]);
	448	g_free(devc->coupling[1]);
	449	devc->coupling[0] = g_strdup(coupling[i]);
	450	devc->coupling[1] = g_strdup(coupling[i]);
	451	set_cfg(sdi, ":CHAN1:COUP %s", devc->coupling[0]);
	452	ret = set_cfg(sdi, ":CHAN2:COUP %s", devc->coupling[1]);
e0b7d23c ML	453	break;
	454	}
	455	}
f6a0ac9f	456	if (i == ARRAY_SIZE(coupling))
e0b7d23c ML	457	ret = SR_ERR_ARG;
e0b7d23c ML	458	break;
f4816ac6	459	default:
035a1078	460	sr_err("Unknown hardware capability: %d.", id);
f4816ac6	461	ret = SR_ERR_ARG;
29d957ce	462	break;
f4816ac6 ML	463	}
	464
	465	return ret;
	466	}
	467
f6a0ac9f	468	static int config_list(int key, GVariant *data, const struct sr_dev_inst sdi)
a1c743fc	469	{
861c447b BV	470	GVariant tuple, rational[2];
	471	GVariantBuilder gvb;
	472	unsigned int i;
a1c743fc BV	473
	474	(void)sdi;
	475
	476	switch (key) {
9a6517d1	477	case SR_CONF_DEVICE_OPTIONS:
f6a0ac9f BV	478	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
f6a0ac9f BV	479	hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
9a6517d1	480	break;
2a7b113d	481	case SR_CONF_COUPLING:
169dbe85 UH	482	*data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
169dbe85 UH	483	break;
e4f2b2ad	484	case SR_CONF_VDIV:
861c447b BV	485	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
	486	for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
	487	rational[0] = g_variant_new_uint64(vdivs[i][0]);
	488	rational[1] = g_variant_new_uint64(vdivs[i][1]);
	489	tuple = g_variant_new_tuple(rational, 2);
	490	g_variant_builder_add_value(&gvb, tuple);
	491	}
	492	*data = g_variant_builder_end(&gvb);
e4f2b2ad	493	break;
41f5bd09	494	case SR_CONF_TIMEBASE:
861c447b BV	495	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
	496	for (i = 0; i < ARRAY_SIZE(timebases); i++) {
	497	rational[0] = g_variant_new_uint64(timebases[i][0]);
	498	rational[1] = g_variant_new_uint64(timebases[i][1]);
	499	tuple = g_variant_new_tuple(rational, 2);
	500	g_variant_builder_add_value(&gvb, tuple);
	501	}
	502	*data = g_variant_builder_end(&gvb);
41f5bd09	503	break;
328bafab	504	case SR_CONF_TRIGGER_SOURCE:
f6a0ac9f BV	505	*data = g_variant_new_strv(trigger_sources,
f6a0ac9f BV	506	ARRAY_SIZE(trigger_sources));
328bafab	507	break;
a1c743fc BV	508	default:
	509	return SR_ERR_ARG;
	510	}
	511
	512	return SR_OK;
	513	}
	514
254dd102	515	static int dev_acquisition_start(const struct sr_dev_inst sdi, void cb_data)
f4816ac6	516	{
29d957ce	517	struct dev_context *devc;
254dd102 BV	518	struct sr_probe *probe;
	519	GSList *l;
	520	int probenum;
	521	char cmd[256];
29d957ce	522
e0b7d23c ML	523	(void)cb_data;
e0b7d23c ML	524
29d957ce UH	525	devc = sdi->priv;
29d957ce UH	526
254dd102 BV	527	for (l = sdi->probes; l; l = l->next) {
	528	probe = l->data;
	529	probenum = probe->name[2] == '1' ? 0 : 1;
	530	if (probe->enabled)
	531	devc->enabled_probes = g_slist_append(devc->enabled_probes, probe);
	532
	533	if (probe->enabled != devc->channels[probenum]) {
	534	/* Enabled channel is currently disabled, or vice versa. */
	535	sprintf(cmd, ":CHAN%d:DISP %s", probenum + 1,
	536	probe->enabled ? "ON" : "OFF");
	537	if (rigol_ds1xx2_send(devc, cmd) != SR_OK)
	538	return SR_ERR;
	539	}
	540	}
	541	if (!devc->enabled_probes)
	542	return SR_ERR;
e0b7d23c	543
254dd102	544	sr_source_add(devc->fd, G_IO_IN, 50, rigol_ds1xx2_receive, (void *)sdi);
e0b7d23c ML	545
e0b7d23c ML	546	/* Send header packet to the session bus. */
4afdfd46	547	std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN);
e0b7d23c	548
254dd102 BV	549	/* Fetch the first frame. */
	550	devc->channel_frame = devc->enabled_probes->data;
	551	if (rigol_ds1xx2_send(devc, ":WAV:DATA? CHAN%c",
	552	devc->channel_frame->name[2]) != SR_OK)
	553	return SR_ERR;
f4816ac6 ML	554
	555	return SR_OK;
	556	}
	557
254dd102	558	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
f4816ac6	559	{
29d957ce UH	560	struct dev_context *devc;
29d957ce UH	561
f4816ac6 ML	562	(void)cb_data;
f4816ac6 ML	563
29d957ce UH	564	devc = sdi->priv;
29d957ce UH	565
f4816ac6 ML	566	if (sdi->status != SR_ST_ACTIVE) {
	567	sr_err("Device inactive, can't stop acquisition.");
	568	return SR_ERR;
	569	}
	570
254dd102 BV	571	g_slist_free(devc->enabled_probes);
254dd102 BV	572	devc->enabled_probes = NULL;
e0b7d23c	573	sr_source_remove(devc->fd);
f4816ac6 ML	574
	575	return SR_OK;
	576	}
	577
	578	SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info = {
	579	.name = "rigol-ds1xx2",
	580	.longname = "Rigol DS1xx2",
	581	.api_version = 1,
	582	.init = hw_init,
	583	.cleanup = hw_cleanup,
	584	.scan = hw_scan,
	585	.dev_list = hw_dev_list,
	586	.dev_clear = clear_instances,
d62d7ad1	587	.config_get = config_get,
035a1078	588	.config_set = config_set,
a1c743fc	589	.config_list = config_list,
f4816ac6 ML	590	.dev_open = hw_dev_open,
f4816ac6 ML	591	.dev_close = hw_dev_close,
254dd102 BV	592	.dev_acquisition_start = dev_acquisition_start,
254dd102 BV	593	.dev_acquisition_stop = dev_acquisition_stop,
f4816ac6 ML	594	.priv = NULL,
f4816ac6 ML	595	};