[libsigrok.git] / hardware / serial-dmm / api.c

/*
 * This file is part of the sigrok project.
 *
 * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
 * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
 * Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
 *
 * 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 <glib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
#include "protocol.h"

static const int hwopts[] = {
	SR_HWOPT_CONN,
	SR_HWOPT_SERIALCOMM,
	0,
};

static const int hwcaps[] = {
	SR_HWCAP_MULTIMETER,
	SR_HWCAP_LIMIT_SAMPLES,
	SR_HWCAP_CONTINUOUS,
	0,
};

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

SR_PRIV struct sr_dev_driver digitek_dt4000zc_driver_info;
SR_PRIV struct sr_dev_driver tekpower_tp4000zc_driver_info;
SR_PRIV struct sr_dev_driver metex_me31_driver_info;
SR_PRIV struct sr_dev_driver peaktech_3410_driver_info;

static struct sr_dev_driver *di_dt4000zc = &digitek_dt4000zc_driver_info;
static struct sr_dev_driver *di_tp4000zc = &tekpower_tp4000zc_driver_info;
static struct sr_dev_driver *di_me31 = &metex_me31_driver_info;
static struct sr_dev_driver *di_3410 = &peaktech_3410_driver_info;

/* After hw_init() this will point to a device-specific entry (see above). */
static struct sr_dev_driver *di = NULL;

SR_PRIV struct dmm_info dmms[] = {
	{
		"Digitek", "DT4000ZC", "2400/8n1", 2400,
		FS9721_PACKET_SIZE, NULL,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		dmm_details_dt4000zc,
	},
	{
		"TekPower", "TP4000ZC", "2400/8n1", 2400,
		FS9721_PACKET_SIZE, NULL,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		dmm_details_tp4000zc,
	},
	{
		"Metex", "ME-31", "600/7n2/rts=0/dtr=1", 600,
		METEX14_PACKET_SIZE, sr_metex14_packet_request,
		sr_metex14_packet_valid, sr_metex14_parse,
		NULL,
	},
	{
		"Peaktech", "3410", "600/7n2/rts=0/dtr=1", 600,
		METEX14_PACKET_SIZE, sr_metex14_packet_request,
		sr_metex14_packet_valid, sr_metex14_parse,
		NULL,
	},
};

/* 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;

	drvc = di->priv;
	for (l = drvc->instances; l; l = l->next) {
		if (!(sdi = l->data))
			continue;
		if (!(devc = sdi->priv))
			continue;
		sr_serial_dev_inst_free(devc->serial);
		sr_dev_inst_free(sdi);
	}
	g_slist_free(drvc->instances);
	drvc->instances = NULL;

	return SR_OK;
}

static int hw_init(int dmm)
{
	struct drv_context *drvc;

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

	if (dmm == DIGITEK_DT4000ZC)
		di = di_dt4000zc;
	if (dmm == TEKPOWER_TP4000ZC)
		di = di_tp4000zc;
	if (dmm == METEX_ME31)
		di = di_me31;
	if (dmm == PEAKTECH_3410)
		di = di_3410;
	sr_dbg("Selected '%s' subdriver.", di->name);

	di->priv = drvc;

	return SR_OK;
}

static int hw_init_digitek_dt4000zc(void)
{
	return hw_init(DIGITEK_DT4000ZC);
}

static int hw_init_tekpower_tp4000zc(void)
{
	return hw_init(TEKPOWER_TP4000ZC);
}

static int hw_init_metex_me31(void)
{
	return hw_init(METEX_ME31);
}

static int hw_init_peaktech_3410(void)
{
	return hw_init(PEAKTECH_3410);
}

static GSList *scan(const char *conn, const char *serialcomm, int dmm)
{
	struct sr_dev_inst *sdi;
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_probe *probe;
	struct sr_serial_dev_inst *serial;
	GSList *devices;
	int dropped, ret;
	size_t len;
	uint8_t buf[128];

	if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
		return NULL;

	if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
		return NULL;

	sr_info("Probing port %s.", conn);

	drvc = di->priv;
	devices = NULL;
	serial_flush(serial);

	/*
	 * There's no way to get an ID from the multimeter. It just sends data
	 * periodically, so the best we can do is check if the packets match
	 * the expected format.
	 */

	/* Let's get a bit of data and see if we can find a packet. */
	len = sizeof(buf);

	/* Request a packet if the DMM requires this. */
	if (dmms[dmm].packet_request) {
		if ((ret = dmms[dmm].packet_request(serial)) < 0) {
			sr_err("Failed to request packet: %d.", ret);
			return FALSE;
		}
	}

	ret = serial_stream_detect(serial, buf, &len, dmms[dmm].packet_size,
				   dmms[dmm].packet_valid, 1000,
				   dmms[dmm].baudrate);
	if (ret != SR_OK)
		goto scan_cleanup;

	/*
	 * If we dropped more than two packets worth of data, something is
	 * wrong. We shouldn't quit however, since the dropped bytes might be
	 * just zeroes at the beginning of the stream. Those can occur as a
	 * combination of the nonstandard cable that ships with this device and
	 * the serial port or USB to serial adapter.
	 */
	dropped = len - dmms[dmm].packet_size;
	if (dropped > 2 * dmms[dmm].packet_size)
		sr_warn("Had to drop too much data.");

	sr_info("Found device on port %s.", conn);

	if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, dmms[dmm].vendor,
				    dmms[dmm].device, "")))
		goto scan_cleanup;

	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
		sr_err("Device context malloc failed.");
		goto scan_cleanup;
	}

	devc->serial = serial;

	sdi->priv = devc;
	sdi->driver = di;
	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
		goto scan_cleanup;
	sdi->probes = g_slist_append(sdi->probes, probe);
	drvc->instances = g_slist_append(drvc->instances, sdi);
	devices = g_slist_append(devices, sdi);

scan_cleanup:
	serial_close(serial);

	return devices;
}

static GSList *hw_scan(GSList *options)
{
	struct sr_hwopt *opt;
	GSList *l, *devices;
	const char *conn, *serialcomm;
	int dmm;

	conn = serialcomm = NULL;
	for (l = options; l; l = l->next) {
		opt = l->data;
		switch (opt->hwopt) {
		case SR_HWOPT_CONN:
			conn = opt->value;
			break;
		case SR_HWOPT_SERIALCOMM:
			serialcomm = opt->value;
			break;
		}
	}
	if (!conn)
		return NULL;

	if (!strcmp(di->name, "digitek-dt4000zc"))
		dmm = 0;
	if (!strcmp(di->name, "tekpower-tp4000zc"))
		dmm = 1;
	if (!strcmp(di->name, "metex-me31"))
		dmm = 2;
	if (!strcmp(di->name, "peaktech-3410"))
		dmm = 3;

	if (serialcomm) {
		/* Use the provided comm specs. */
		devices = scan(conn, serialcomm, dmm);
	} else {
		/* Try the default. */
		devices = scan(conn, dmms[dmm].conn, dmm);
	}

	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;

	if (!(devc = sdi->priv)) {
		sr_err("sdi->priv was NULL.");
		return SR_ERR_BUG;
	}

	if (serial_open(devc->serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
		return SR_ERR;

	sdi->status = SR_ST_ACTIVE;

	return SR_OK;
}

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

	if (!(devc = sdi->priv)) {
		sr_err("sdi->priv was NULL.");
		return SR_ERR_BUG;
	}

	if (devc->serial && devc->serial->fd != -1) {
		serial_close(devc->serial);
		sdi->status = SR_ST_INACTIVE;
	}

	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_HWOPTS:
		*data = hwopts;
		break;
	case SR_DI_HWCAPS:
		*data = hwcaps;
		break;
	case SR_DI_NUM_PROBES:
		*data = GINT_TO_POINTER(1);
		break;
	case SR_DI_PROBE_NAMES:
		*data = probe_names;
		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;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR;

	if (!(devc = sdi->priv)) {
		sr_err("sdi->priv was NULL.");
		return SR_ERR_BUG;
	}

	switch (hwcap) {
	case SR_HWCAP_LIMIT_SAMPLES:
		devc->limit_samples = *(const uint64_t *)value;
		sr_dbg("Setting sample limit to %" PRIu64 ".",
		       devc->limit_samples);
		break;
	default:
		sr_err("Unknown capability: %d.", hwcap);
		return SR_ERR;
		break;
	}

	return SR_OK;
}

static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
				    void *cb_data)
{
	struct sr_datafeed_packet packet;
	struct sr_datafeed_header header;
	struct sr_datafeed_meta_analog meta;
	struct dev_context *devc;
	int (*receive_data)(int, int, void *) = NULL;

	if (!(devc = sdi->priv)) {
		sr_err("sdi->priv was NULL.");
		return SR_ERR_BUG;
	}

	sr_dbg("Starting acquisition.");

	devc->cb_data = cb_data;

	/*
	 * Reset the number of samples to take. If we've already collected our
	 * quota, but we start a new session, and don't reset this, we'll just
	 * quit without acquiring any new samples.
	 */
	devc->num_samples = 0;

	/* Send header packet to the session bus. */
	sr_dbg("Sending SR_DF_HEADER.");
	packet.type = SR_DF_HEADER;
	packet.payload = (uint8_t *)&header;
	header.feed_version = 1;
	gettimeofday(&header.starttime, NULL);
	sr_session_send(devc->cb_data, &packet);

	/* Send metadata about the SR_DF_ANALOG packets to come. */
	sr_dbg("Sending SR_DF_META_ANALOG.");
	packet.type = SR_DF_META_ANALOG;
	packet.payload = &meta;
	meta.num_probes = 1;
	sr_session_send(devc->cb_data, &packet);

	if (!strcmp(di->name, "digitek-dt4000zc"))
		receive_data = digitek_dt4000zc_receive_data;
	if (!strcmp(di->name, "tekpower-tp4000zc"))
		receive_data = tekpower_tp4000zc_receive_data;
	if (!strcmp(di->name, "metex-me31"))
		receive_data = metex_me31_receive_data;
	if (!strcmp(di->name, "peaktech-3410"))
		receive_data = peaktech_3410_receive_data;

	/* Poll every 50ms, or whenever some data comes in. */
	sr_source_add(devc->serial->fd, G_IO_IN, 50,
		      receive_data, (void *)sdi);

	return SR_OK;
}

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

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR;

	if (!(devc = sdi->priv)) {
		sr_err("sdi->priv was NULL.");
		return SR_ERR_BUG;
	}

	sr_dbg("Stopping acquisition.");

	sr_source_remove(devc->serial->fd);
	hw_dev_close((struct sr_dev_inst *)sdi);

	/* Send end packet to the session bus. */
	sr_dbg("Sending SR_DF_END.");
	packet.type = SR_DF_END;
	sr_session_send(cb_data, &packet);

	return SR_OK;
}

SR_PRIV struct sr_dev_driver digitek_dt4000zc_driver_info = {
	.name = "digitek-dt4000zc",
	.longname = "Digitek DT4000ZC",
	.api_version = 1,
	.init = hw_init_digitek_dt4000zc,
	.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,
};

SR_PRIV struct sr_dev_driver tekpower_tp4000zc_driver_info = {
	.name = "tekpower-tp4000zc",
	.longname = "TekPower TP4000ZC",
	.api_version = 1,
	.init = hw_init_tekpower_tp4000zc,
	.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,
};

SR_PRIV struct sr_dev_driver metex_me31_driver_info = {
	.name = "metex-me31",
	.longname = "Metex ME-31",
	.api_version = 1,
	.init = hw_init_metex_me31,
	.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,
};

SR_PRIV struct sr_dev_driver peaktech_3410_driver_info = {
	.name = "peaktech-3410",
	.longname = "PeakTech 3410",
	.api_version = 1,
	.init = hw_init_peaktech_3410,
	.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
7dc55d93 AG	1	/*
	2	* This file is part of the sigrok project.
	3	*
	4	* Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
	5	* Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
729b01f9	6	* Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
7dc55d93 AG	7	*
	8	* This program is free software: you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation, either version 3 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	20	*/
	21
	22	#include <glib.h>
7dc55d93 AG	23	#include <sys/types.h>
	24	#include <sys/stat.h>
	25	#include <fcntl.h>
	26	#include <string.h>
	27	#include <errno.h>
bbabddbd UH	28	#include "libsigrok.h"
	29	#include "libsigrok-internal.h"
	30	#include "protocol.h"
7dc55d93 AG	31
	32	static const int hwopts[] = {
	33	SR_HWOPT_CONN,
	34	SR_HWOPT_SERIALCOMM,
	35	0,
	36	};
	37
	38	static const int hwcaps[] = {
	39	SR_HWCAP_MULTIMETER,
	40	SR_HWCAP_LIMIT_SAMPLES,
	41	SR_HWCAP_CONTINUOUS,
	42	0,
	43	};
	44
	45	static const char *probe_names[] = {
	46	"Probe",
	47	NULL,
	48	};
	49
f086b830	50	SR_PRIV struct sr_dev_driver digitek_dt4000zc_driver_info;
729b01f9	51	SR_PRIV struct sr_dev_driver tekpower_tp4000zc_driver_info;
ce3777ad	52	SR_PRIV struct sr_dev_driver metex_me31_driver_info;
f0ac4929	53	SR_PRIV struct sr_dev_driver peaktech_3410_driver_info;
f086b830	54
ce3777ad UH	55	static struct sr_dev_driver *di_dt4000zc = &digitek_dt4000zc_driver_info;
	56	static struct sr_dev_driver *di_tp4000zc = &tekpower_tp4000zc_driver_info;
	57	static struct sr_dev_driver *di_me31 = &metex_me31_driver_info;
f0ac4929	58	static struct sr_dev_driver *di_3410 = &peaktech_3410_driver_info;
729b01f9 UH	59
	60	/* After hw_init() this will point to a device-specific entry (see above). */
	61	static struct sr_dev_driver *di = NULL;
	62
	63	SR_PRIV struct dmm_info dmms[] = {
f086b830	64	{
ce3777ad UH	65	"Digitek", "DT4000ZC", "2400/8n1", 2400,
	66	FS9721_PACKET_SIZE, NULL,
	67	sr_fs9721_packet_valid, sr_fs9721_parse,
f086b830 UH	68	dmm_details_dt4000zc,
f086b830 UH	69	},
729b01f9	70	{
ce3777ad UH	71	"TekPower", "TP4000ZC", "2400/8n1", 2400,
	72	FS9721_PACKET_SIZE, NULL,
	73	sr_fs9721_packet_valid, sr_fs9721_parse,
729b01f9 UH	74	dmm_details_tp4000zc,
729b01f9 UH	75	},
ce3777ad UH	76	{
	77	"Metex", "ME-31", "600/7n2/rts=0/dtr=1", 600,
	78	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	79	sr_metex14_packet_valid, sr_metex14_parse,
	80	NULL,
	81	},
f0ac4929 UH	82	{
	83	"Peaktech", "3410", "600/7n2/rts=0/dtr=1", 600,
	84	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	85	sr_metex14_packet_valid, sr_metex14_parse,
	86	NULL,
	87	},
729b01f9	88	};
7dc55d93 AG	89
	90	/* Properly close and free all devices. */
	91	static int clear_instances(void)
	92	{
	93	struct sr_dev_inst *sdi;
	94	struct drv_context *drvc;
	95	struct dev_context *devc;
	96	GSList *l;
	97
	98	if (!(drvc = di->priv))
	99	return SR_OK;
	100
	101	drvc = di->priv;
	102	for (l = drvc->instances; l; l = l->next) {
	103	if (!(sdi = l->data))
	104	continue;
	105	if (!(devc = sdi->priv))
	106	continue;
	107	sr_serial_dev_inst_free(devc->serial);
	108	sr_dev_inst_free(sdi);
	109	}
	110	g_slist_free(drvc->instances);
	111	drvc->instances = NULL;
	112
	113	return SR_OK;
	114	}
	115
729b01f9	116	static int hw_init(int dmm)
7dc55d93 AG	117	{
	118	struct drv_context *drvc;
	119
	120	if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
bbabddbd UH	121	sr_err("Driver context malloc failed.");
bbabddbd UH	122	return SR_ERR_MALLOC;
7dc55d93 AG	123	}
7dc55d93 AG	124
f086b830	125	if (dmm == DIGITEK_DT4000ZC)
ce3777ad	126	di = di_dt4000zc;
729b01f9	127	if (dmm == TEKPOWER_TP4000ZC)
ce3777ad UH	128	di = di_tp4000zc;
	129	if (dmm == METEX_ME31)
	130	di = di_me31;
f0ac4929 UH	131	if (dmm == PEAKTECH_3410)
f0ac4929 UH	132	di = di_3410;
729b01f9 UH	133	sr_dbg("Selected '%s' subdriver.", di->name);
729b01f9 UH	134
7dc55d93 AG	135	di->priv = drvc;
	136
	137	return SR_OK;
	138	}
	139
f086b830 UH	140	static int hw_init_digitek_dt4000zc(void)
	141	{
	142	return hw_init(DIGITEK_DT4000ZC);
	143	}
	144
729b01f9 UH	145	static int hw_init_tekpower_tp4000zc(void)
	146	{
	147	return hw_init(TEKPOWER_TP4000ZC);
	148	}
	149
ce3777ad UH	150	static int hw_init_metex_me31(void)
	151	{
	152	return hw_init(METEX_ME31);
	153	}
	154
f0ac4929 UH	155	static int hw_init_peaktech_3410(void)
	156	{
	157	return hw_init(PEAKTECH_3410);
	158	}
	159
729b01f9	160	static GSList scan(const char conn, const char *serialcomm, int dmm)
7dc55d93 AG	161	{
	162	struct sr_dev_inst *sdi;
	163	struct drv_context *drvc;
	164	struct dev_context *devc;
	165	struct sr_probe *probe;
d35afa87	166	struct sr_serial_dev_inst *serial;
7dc55d93	167	GSList *devices;
2546b05c AG	168	int dropped, ret;
	169	size_t len;
	170	uint8_t buf[128];
7dc55d93	171
d35afa87	172	if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
7dc55d93	173	return NULL;
d35afa87	174
ce3777ad	175	if (serial_open(serial, SERIAL_RDWR \| SERIAL_NONBLOCK) != SR_OK)
7dc55d93	176	return NULL;
7dc55d93	177
ce3777ad	178	sr_info("Probing port %s.", conn);
7dc55d93 AG	179
7dc55d93 AG	180	drvc = di->priv;
7dc55d93	181	devices = NULL;
d35afa87	182	serial_flush(serial);
bbabddbd UH	183
	184	/*
	185	* There's no way to get an ID from the multimeter. It just sends data
	186	* periodically, so the best we can do is check if the packets match
	187	* the expected format.
	188	*/
7dc55d93	189
2546b05c AG	190	/* Let's get a bit of data and see if we can find a packet. */
2546b05c AG	191	len = sizeof(buf);
7dc55d93	192
ce3777ad UH	193	/* Request a packet if the DMM requires this. */
	194	if (dmms[dmm].packet_request) {
	195	if ((ret = dmms[dmm].packet_request(serial)) < 0) {
	196	sr_err("Failed to request packet: %d.", ret);
	197	return FALSE;
	198	}
	199	}
	200
729b01f9 UH	201	ret = serial_stream_detect(serial, buf, &len, dmms[dmm].packet_size,
	202	dmms[dmm].packet_valid, 1000,
	203	dmms[dmm].baudrate);
2546b05c AG	204	if (ret != SR_OK)
2546b05c AG	205	goto scan_cleanup;
7dc55d93	206
2546b05c AG	207	/*
	208	* If we dropped more than two packets worth of data, something is
	209	* wrong. We shouldn't quit however, since the dropped bytes might be
	210	* just zeroes at the beginning of the stream. Those can occur as a
	211	* combination of the nonstandard cable that ships with this device and
	212	* the serial port or USB to serial adapter.
	213	*/
729b01f9 UH	214	dropped = len - dmms[dmm].packet_size;
729b01f9 UH	215	if (dropped > 2 * dmms[dmm].packet_size)
6bef68a7	216	sr_warn("Had to drop too much data.");
7dc55d93	217
2546b05c	218	sr_info("Found device on port %s.", conn);
7dc55d93	219
729b01f9 UH	220	if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, dmms[dmm].vendor,
729b01f9 UH	221	dmms[dmm].device, "")))
2546b05c	222	goto scan_cleanup;
6bef68a7	223
2546b05c AG	224	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
	225	sr_err("Device context malloc failed.");
	226	goto scan_cleanup;
7dc55d93 AG	227	}
7dc55d93 AG	228
2546b05c AG	229	devc->serial = serial;
	230
	231	sdi->priv = devc;
	232	sdi->driver = di;
	233	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
	234	goto scan_cleanup;
	235	sdi->probes = g_slist_append(sdi->probes, probe);
	236	drvc->instances = g_slist_append(drvc->instances, sdi);
	237	devices = g_slist_append(devices, sdi);
	238
	239	scan_cleanup:
d35afa87	240	serial_close(serial);
2546b05c	241
7dc55d93 AG	242	return devices;
	243	}
	244
	245	static GSList hw_scan(GSList options)
	246	{
	247	struct sr_hwopt *opt;
	248	GSList l, devices;
	249	const char conn, serialcomm;
729b01f9	250	int dmm;
7dc55d93 AG	251
	252	conn = serialcomm = NULL;
	253	for (l = options; l; l = l->next) {
	254	opt = l->data;
	255	switch (opt->hwopt) {
	256	case SR_HWOPT_CONN:
	257	conn = opt->value;
	258	break;
	259	case SR_HWOPT_SERIALCOMM:
	260	serialcomm = opt->value;
	261	break;
	262	}
	263	}
	264	if (!conn)
	265	return NULL;
	266
f086b830	267	if (!strcmp(di->name, "digitek-dt4000zc"))
729b01f9	268	dmm = 0;
f086b830 UH	269	if (!strcmp(di->name, "tekpower-tp4000zc"))
f086b830 UH	270	dmm = 1;
ce3777ad UH	271	if (!strcmp(di->name, "metex-me31"))
ce3777ad UH	272	dmm = 2;
f0ac4929 UH	273	if (!strcmp(di->name, "peaktech-3410"))
f0ac4929 UH	274	dmm = 3;
729b01f9	275
7dc55d93 AG	276	if (serialcomm) {
7dc55d93 AG	277	/* Use the provided comm specs. */
729b01f9	278	devices = scan(conn, serialcomm, dmm);
7dc55d93	279	} else {
d35afa87	280	/* Try the default. */
729b01f9	281	devices = scan(conn, dmms[dmm].conn, dmm);
7dc55d93 AG	282	}
	283
	284	return devices;
	285	}
	286
	287	static GSList *hw_dev_list(void)
	288	{
	289	struct drv_context *drvc;
	290
	291	drvc = di->priv;
	292
	293	return drvc->instances;
	294	}
	295
	296	static int hw_dev_open(struct sr_dev_inst *sdi)
	297	{
	298	struct dev_context *devc;
	299
	300	if (!(devc = sdi->priv)) {
	301	sr_err("sdi->priv was NULL.");
	302	return SR_ERR_BUG;
	303	}
	304
ce3777ad	305	if (serial_open(devc->serial, SERIAL_RDWR \| SERIAL_NONBLOCK) != SR_OK)
7dc55d93	306	return SR_ERR;
bbabddbd	307
7dc55d93 AG	308	sdi->status = SR_ST_ACTIVE;
	309
	310	return SR_OK;
	311	}
	312
	313	static int hw_dev_close(struct sr_dev_inst *sdi)
	314	{
	315	struct dev_context *devc;
	316
	317	if (!(devc = sdi->priv)) {
	318	sr_err("sdi->priv was NULL.");
	319	return SR_ERR_BUG;
	320	}
	321
	322	if (devc->serial && devc->serial->fd != -1) {
d35afa87	323	serial_close(devc->serial);
7dc55d93 AG	324	sdi->status = SR_ST_INACTIVE;
	325	}
	326
	327	return SR_OK;
	328	}
	329
	330	static int hw_cleanup(void)
	331	{
	332	clear_instances();
	333
	334	return SR_OK;
	335	}
	336
	337	static int hw_info_get(int info_id, const void **data,
bbabddbd	338	const struct sr_dev_inst *sdi)
7dc55d93	339	{
bbabddbd	340	(void)sdi;
7dc55d93 AG	341
	342	switch (info_id) {
	343	case SR_DI_HWOPTS:
	344	*data = hwopts;
	345	break;
	346	case SR_DI_HWCAPS:
	347	*data = hwcaps;
	348	break;
	349	case SR_DI_NUM_PROBES:
	350	*data = GINT_TO_POINTER(1);
	351	break;
	352	case SR_DI_PROBE_NAMES:
	353	*data = probe_names;
	354	break;
	355	default:
	356	return SR_ERR_ARG;
	357	}
	358
	359	return SR_OK;
	360	}
	361
	362	static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
bbabddbd	363	const void *value)
7dc55d93 AG	364	{
	365	struct dev_context *devc;
	366
	367	if (sdi->status != SR_ST_ACTIVE)
	368	return SR_ERR;
	369
	370	if (!(devc = sdi->priv)) {
	371	sr_err("sdi->priv was NULL.");
	372	return SR_ERR_BUG;
	373	}
	374
	375	switch (hwcap) {
	376	case SR_HWCAP_LIMIT_SAMPLES:
	377	devc->limit_samples = (const uint64_t )value;
	378	sr_dbg("Setting sample limit to %" PRIu64 ".",
	379	devc->limit_samples);
	380	break;
	381	default:
	382	sr_err("Unknown capability: %d.", hwcap);
	383	return SR_ERR;
	384	break;
	385	}
	386
	387	return SR_OK;
	388	}
	389
	390	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
bbabddbd	391	void *cb_data)
7dc55d93 AG	392	{
	393	struct sr_datafeed_packet packet;
	394	struct sr_datafeed_header header;
	395	struct sr_datafeed_meta_analog meta;
	396	struct dev_context *devc;
729b01f9	397	int (receive_data)(int, int, void ) = NULL;
7dc55d93 AG	398
	399	if (!(devc = sdi->priv)) {
	400	sr_err("sdi->priv was NULL.");
	401	return SR_ERR_BUG;
	402	}
	403
	404	sr_dbg("Starting acquisition.");
	405
	406	devc->cb_data = cb_data;
	407
bbabddbd UH	408	/*
bbabddbd UH	409	* Reset the number of samples to take. If we've already collected our
7dc55d93	410	* quota, but we start a new session, and don't reset this, we'll just
bbabddbd UH	411	* quit without acquiring any new samples.
bbabddbd UH	412	*/
7dc55d93 AG	413	devc->num_samples = 0;
	414
	415	/* Send header packet to the session bus. */
	416	sr_dbg("Sending SR_DF_HEADER.");
	417	packet.type = SR_DF_HEADER;
	418	packet.payload = (uint8_t *)&header;
	419	header.feed_version = 1;
	420	gettimeofday(&header.starttime, NULL);
	421	sr_session_send(devc->cb_data, &packet);
	422
	423	/* Send metadata about the SR_DF_ANALOG packets to come. */
	424	sr_dbg("Sending SR_DF_META_ANALOG.");
	425	packet.type = SR_DF_META_ANALOG;
	426	packet.payload = &meta;
	427	meta.num_probes = 1;
	428	sr_session_send(devc->cb_data, &packet);
	429
f086b830 UH	430	if (!strcmp(di->name, "digitek-dt4000zc"))
f086b830 UH	431	receive_data = digitek_dt4000zc_receive_data;
729b01f9 UH	432	if (!strcmp(di->name, "tekpower-tp4000zc"))
729b01f9 UH	433	receive_data = tekpower_tp4000zc_receive_data;
ce3777ad UH	434	if (!strcmp(di->name, "metex-me31"))
ce3777ad UH	435	receive_data = metex_me31_receive_data;
f0ac4929 UH	436	if (!strcmp(di->name, "peaktech-3410"))
f0ac4929 UH	437	receive_data = peaktech_3410_receive_data;
729b01f9	438
bbabddbd	439	/* Poll every 50ms, or whenever some data comes in. */
7dc55d93	440	sr_source_add(devc->serial->fd, G_IO_IN, 50,
729b01f9	441	receive_data, (void *)sdi);
7dc55d93 AG	442
	443	return SR_OK;
	444	}
	445
69b07d14	446	static int hw_dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
7dc55d93 AG	447	{
	448	struct sr_datafeed_packet packet;
	449	struct dev_context *devc;
	450
	451	if (sdi->status != SR_ST_ACTIVE)
	452	return SR_ERR;
	453
	454	if (!(devc = sdi->priv)) {
	455	sr_err("sdi->priv was NULL.");
	456	return SR_ERR_BUG;
	457	}
	458
	459	sr_dbg("Stopping acquisition.");
	460
	461	sr_source_remove(devc->serial->fd);
	462	hw_dev_close((struct sr_dev_inst *)sdi);
	463
	464	/* Send end packet to the session bus. */
	465	sr_dbg("Sending SR_DF_END.");
	466	packet.type = SR_DF_END;
	467	sr_session_send(cb_data, &packet);
	468
	469	return SR_OK;
	470	}
	471
f086b830 UH	472	SR_PRIV struct sr_dev_driver digitek_dt4000zc_driver_info = {
	473	.name = "digitek-dt4000zc",
	474	.longname = "Digitek DT4000ZC",
	475	.api_version = 1,
	476	.init = hw_init_digitek_dt4000zc,
	477	.cleanup = hw_cleanup,
	478	.scan = hw_scan,
	479	.dev_list = hw_dev_list,
	480	.dev_clear = clear_instances,
	481	.dev_open = hw_dev_open,
	482	.dev_close = hw_dev_close,
	483	.info_get = hw_info_get,
	484	.dev_config_set = hw_dev_config_set,
	485	.dev_acquisition_start = hw_dev_acquisition_start,
	486	.dev_acquisition_stop = hw_dev_acquisition_stop,
	487	.priv = NULL,
	488	};
	489
729b01f9 UH	490	SR_PRIV struct sr_dev_driver tekpower_tp4000zc_driver_info = {
	491	.name = "tekpower-tp4000zc",
	492	.longname = "TekPower TP4000ZC",
7dc55d93	493	.api_version = 1,
729b01f9	494	.init = hw_init_tekpower_tp4000zc,
7dc55d93 AG	495	.cleanup = hw_cleanup,
	496	.scan = hw_scan,
	497	.dev_list = hw_dev_list,
	498	.dev_clear = clear_instances,
	499	.dev_open = hw_dev_open,
	500	.dev_close = hw_dev_close,
	501	.info_get = hw_info_get,
	502	.dev_config_set = hw_dev_config_set,
	503	.dev_acquisition_start = hw_dev_acquisition_start,
	504	.dev_acquisition_stop = hw_dev_acquisition_stop,
	505	.priv = NULL,
	506	};
ce3777ad UH	507
	508	SR_PRIV struct sr_dev_driver metex_me31_driver_info = {
	509	.name = "metex-me31",
	510	.longname = "Metex ME-31",
	511	.api_version = 1,
	512	.init = hw_init_metex_me31,
	513	.cleanup = hw_cleanup,
	514	.scan = hw_scan,
	515	.dev_list = hw_dev_list,
	516	.dev_clear = clear_instances,
	517	.dev_open = hw_dev_open,
	518	.dev_close = hw_dev_close,
	519	.info_get = hw_info_get,
	520	.dev_config_set = hw_dev_config_set,
	521	.dev_acquisition_start = hw_dev_acquisition_start,
	522	.dev_acquisition_stop = hw_dev_acquisition_stop,
	523	.priv = NULL,
	524	};
f0ac4929 UH	525
	526	SR_PRIV struct sr_dev_driver peaktech_3410_driver_info = {
	527	.name = "peaktech-3410",
	528	.longname = "PeakTech 3410",
	529	.api_version = 1,
	530	.init = hw_init_peaktech_3410,
	531	.cleanup = hw_cleanup,
	532	.scan = hw_scan,
	533	.dev_list = hw_dev_list,
	534	.dev_clear = clear_instances,
	535	.dev_open = hw_dev_open,
	536	.dev_close = hw_dev_close,
	537	.info_get = hw_info_get,
	538	.dev_config_set = hw_dev_config_set,
	539	.dev_acquisition_start = hw_dev_acquisition_start,
	540	.dev_acquisition_stop = hw_dev_acquisition_stop,
	541	.priv = NULL,
	542	};