[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;
SR_PRIV struct sr_dev_driver mastech_mas345_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;
static struct sr_dev_driver *di_mas345 = &mastech_mas345_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,
	},
	{
		"MASTECH", "MAS345", "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;
	if (dmm == MASTECH_MAS345)
		di = di_mas345;
	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 int hw_init_mastech_mas345(void)
{
	return hw_init(MASTECH_MAS345);
}

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 (!strcmp(di->name, "mastech-mas345"))
		dmm = 4;

	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;
	if (!strcmp(di->name, "mastech-mas345"))
		receive_data = mastech_mas345_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,
};

SR_PRIV struct sr_dev_driver mastech_mas345_driver_info = {
	.name = "mastech-mas345",
	.longname = "MASTECH MAS345",
	.api_version = 1,
	.init = hw_init_mastech_mas345,
	.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;
5887c9cc	54	SR_PRIV struct sr_dev_driver mastech_mas345_driver_info;
f086b830	55
ce3777ad UH	56	static struct sr_dev_driver *di_dt4000zc = &digitek_dt4000zc_driver_info;
	57	static struct sr_dev_driver *di_tp4000zc = &tekpower_tp4000zc_driver_info;
	58	static struct sr_dev_driver *di_me31 = &metex_me31_driver_info;
f0ac4929	59	static struct sr_dev_driver *di_3410 = &peaktech_3410_driver_info;
5887c9cc	60	static struct sr_dev_driver *di_mas345 = &mastech_mas345_driver_info;
729b01f9 UH	61
	62	/* After hw_init() this will point to a device-specific entry (see above). */
	63	static struct sr_dev_driver *di = NULL;
	64
	65	SR_PRIV struct dmm_info dmms[] = {
f086b830	66	{
ce3777ad UH	67	"Digitek", "DT4000ZC", "2400/8n1", 2400,
	68	FS9721_PACKET_SIZE, NULL,
	69	sr_fs9721_packet_valid, sr_fs9721_parse,
f086b830 UH	70	dmm_details_dt4000zc,
f086b830 UH	71	},
729b01f9	72	{
ce3777ad UH	73	"TekPower", "TP4000ZC", "2400/8n1", 2400,
	74	FS9721_PACKET_SIZE, NULL,
	75	sr_fs9721_packet_valid, sr_fs9721_parse,
729b01f9 UH	76	dmm_details_tp4000zc,
729b01f9 UH	77	},
ce3777ad UH	78	{
	79	"Metex", "ME-31", "600/7n2/rts=0/dtr=1", 600,
	80	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	81	sr_metex14_packet_valid, sr_metex14_parse,
	82	NULL,
	83	},
f0ac4929 UH	84	{
	85	"Peaktech", "3410", "600/7n2/rts=0/dtr=1", 600,
	86	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	87	sr_metex14_packet_valid, sr_metex14_parse,
	88	NULL,
	89	},
5887c9cc UH	90	{
	91	"MASTECH", "MAS345", "600/7n2/rts=0/dtr=1", 600,
	92	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	93	sr_metex14_packet_valid, sr_metex14_parse,
	94	NULL,
	95	},
729b01f9	96	};
7dc55d93 AG	97
	98	/* Properly close and free all devices. */
	99	static int clear_instances(void)
	100	{
	101	struct sr_dev_inst *sdi;
	102	struct drv_context *drvc;
	103	struct dev_context *devc;
	104	GSList *l;
	105
	106	if (!(drvc = di->priv))
	107	return SR_OK;
	108
	109	drvc = di->priv;
	110	for (l = drvc->instances; l; l = l->next) {
	111	if (!(sdi = l->data))
	112	continue;
	113	if (!(devc = sdi->priv))
	114	continue;
	115	sr_serial_dev_inst_free(devc->serial);
	116	sr_dev_inst_free(sdi);
	117	}
	118	g_slist_free(drvc->instances);
	119	drvc->instances = NULL;
	120
	121	return SR_OK;
	122	}
	123
729b01f9	124	static int hw_init(int dmm)
7dc55d93 AG	125	{
	126	struct drv_context *drvc;
	127
	128	if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
bbabddbd UH	129	sr_err("Driver context malloc failed.");
bbabddbd UH	130	return SR_ERR_MALLOC;
7dc55d93 AG	131	}
7dc55d93 AG	132
f086b830	133	if (dmm == DIGITEK_DT4000ZC)
ce3777ad	134	di = di_dt4000zc;
729b01f9	135	if (dmm == TEKPOWER_TP4000ZC)
ce3777ad UH	136	di = di_tp4000zc;
	137	if (dmm == METEX_ME31)
	138	di = di_me31;
f0ac4929 UH	139	if (dmm == PEAKTECH_3410)
f0ac4929 UH	140	di = di_3410;
5887c9cc UH	141	if (dmm == MASTECH_MAS345)
5887c9cc UH	142	di = di_mas345;
729b01f9 UH	143	sr_dbg("Selected '%s' subdriver.", di->name);
729b01f9 UH	144
7dc55d93 AG	145	di->priv = drvc;
	146
	147	return SR_OK;
	148	}
	149
f086b830 UH	150	static int hw_init_digitek_dt4000zc(void)
	151	{
	152	return hw_init(DIGITEK_DT4000ZC);
	153	}
	154
729b01f9 UH	155	static int hw_init_tekpower_tp4000zc(void)
	156	{
	157	return hw_init(TEKPOWER_TP4000ZC);
	158	}
	159
ce3777ad UH	160	static int hw_init_metex_me31(void)
	161	{
	162	return hw_init(METEX_ME31);
	163	}
	164
f0ac4929 UH	165	static int hw_init_peaktech_3410(void)
	166	{
	167	return hw_init(PEAKTECH_3410);
	168	}
	169
5887c9cc UH	170	static int hw_init_mastech_mas345(void)
	171	{
	172	return hw_init(MASTECH_MAS345);
	173	}
	174
729b01f9	175	static GSList scan(const char conn, const char *serialcomm, int dmm)
7dc55d93 AG	176	{
	177	struct sr_dev_inst *sdi;
	178	struct drv_context *drvc;
	179	struct dev_context *devc;
	180	struct sr_probe *probe;
d35afa87	181	struct sr_serial_dev_inst *serial;
7dc55d93	182	GSList *devices;
2546b05c AG	183	int dropped, ret;
	184	size_t len;
	185	uint8_t buf[128];
7dc55d93	186
d35afa87	187	if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
7dc55d93	188	return NULL;
d35afa87	189
ce3777ad	190	if (serial_open(serial, SERIAL_RDWR \| SERIAL_NONBLOCK) != SR_OK)
7dc55d93	191	return NULL;
7dc55d93	192
ce3777ad	193	sr_info("Probing port %s.", conn);
7dc55d93 AG	194
7dc55d93 AG	195	drvc = di->priv;
7dc55d93	196	devices = NULL;
d35afa87	197	serial_flush(serial);
bbabddbd UH	198
	199	/*
	200	* There's no way to get an ID from the multimeter. It just sends data
	201	* periodically, so the best we can do is check if the packets match
	202	* the expected format.
	203	*/
7dc55d93	204
2546b05c AG	205	/* Let's get a bit of data and see if we can find a packet. */
2546b05c AG	206	len = sizeof(buf);
7dc55d93	207
ce3777ad UH	208	/* Request a packet if the DMM requires this. */
	209	if (dmms[dmm].packet_request) {
	210	if ((ret = dmms[dmm].packet_request(serial)) < 0) {
	211	sr_err("Failed to request packet: %d.", ret);
	212	return FALSE;
	213	}
	214	}
	215
729b01f9 UH	216	ret = serial_stream_detect(serial, buf, &len, dmms[dmm].packet_size,
	217	dmms[dmm].packet_valid, 1000,
	218	dmms[dmm].baudrate);
2546b05c AG	219	if (ret != SR_OK)
2546b05c AG	220	goto scan_cleanup;
7dc55d93	221
2546b05c AG	222	/*
	223	* If we dropped more than two packets worth of data, something is
	224	* wrong. We shouldn't quit however, since the dropped bytes might be
	225	* just zeroes at the beginning of the stream. Those can occur as a
	226	* combination of the nonstandard cable that ships with this device and
	227	* the serial port or USB to serial adapter.
	228	*/
729b01f9 UH	229	dropped = len - dmms[dmm].packet_size;
729b01f9 UH	230	if (dropped > 2 * dmms[dmm].packet_size)
6bef68a7	231	sr_warn("Had to drop too much data.");
7dc55d93	232
2546b05c	233	sr_info("Found device on port %s.", conn);
7dc55d93	234
729b01f9 UH	235	if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, dmms[dmm].vendor,
729b01f9 UH	236	dmms[dmm].device, "")))
2546b05c	237	goto scan_cleanup;
6bef68a7	238
2546b05c AG	239	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
	240	sr_err("Device context malloc failed.");
	241	goto scan_cleanup;
7dc55d93 AG	242	}
7dc55d93 AG	243
2546b05c AG	244	devc->serial = serial;
	245
	246	sdi->priv = devc;
	247	sdi->driver = di;
	248	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
	249	goto scan_cleanup;
	250	sdi->probes = g_slist_append(sdi->probes, probe);
	251	drvc->instances = g_slist_append(drvc->instances, sdi);
	252	devices = g_slist_append(devices, sdi);
	253
	254	scan_cleanup:
d35afa87	255	serial_close(serial);
2546b05c	256
7dc55d93 AG	257	return devices;
	258	}
	259
	260	static GSList hw_scan(GSList options)
	261	{
	262	struct sr_hwopt *opt;
	263	GSList l, devices;
	264	const char conn, serialcomm;
729b01f9	265	int dmm;
7dc55d93 AG	266
	267	conn = serialcomm = NULL;
	268	for (l = options; l; l = l->next) {
	269	opt = l->data;
	270	switch (opt->hwopt) {
	271	case SR_HWOPT_CONN:
	272	conn = opt->value;
	273	break;
	274	case SR_HWOPT_SERIALCOMM:
	275	serialcomm = opt->value;
	276	break;
	277	}
	278	}
	279	if (!conn)
	280	return NULL;
	281
f086b830	282	if (!strcmp(di->name, "digitek-dt4000zc"))
729b01f9	283	dmm = 0;
f086b830 UH	284	if (!strcmp(di->name, "tekpower-tp4000zc"))
f086b830 UH	285	dmm = 1;
ce3777ad UH	286	if (!strcmp(di->name, "metex-me31"))
ce3777ad UH	287	dmm = 2;
f0ac4929 UH	288	if (!strcmp(di->name, "peaktech-3410"))
f0ac4929 UH	289	dmm = 3;
5887c9cc UH	290	if (!strcmp(di->name, "mastech-mas345"))
5887c9cc UH	291	dmm = 4;
729b01f9	292
7dc55d93 AG	293	if (serialcomm) {
7dc55d93 AG	294	/* Use the provided comm specs. */
729b01f9	295	devices = scan(conn, serialcomm, dmm);
7dc55d93	296	} else {
d35afa87	297	/* Try the default. */
729b01f9	298	devices = scan(conn, dmms[dmm].conn, dmm);
7dc55d93 AG	299	}
	300
	301	return devices;
	302	}
	303
	304	static GSList *hw_dev_list(void)
	305	{
	306	struct drv_context *drvc;
	307
	308	drvc = di->priv;
	309
	310	return drvc->instances;
	311	}
	312
	313	static int hw_dev_open(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
ce3777ad	322	if (serial_open(devc->serial, SERIAL_RDWR \| SERIAL_NONBLOCK) != SR_OK)
7dc55d93	323	return SR_ERR;
bbabddbd	324
7dc55d93 AG	325	sdi->status = SR_ST_ACTIVE;
	326
	327	return SR_OK;
	328	}
	329
	330	static int hw_dev_close(struct sr_dev_inst *sdi)
	331	{
	332	struct dev_context *devc;
	333
	334	if (!(devc = sdi->priv)) {
	335	sr_err("sdi->priv was NULL.");
	336	return SR_ERR_BUG;
	337	}
	338
	339	if (devc->serial && devc->serial->fd != -1) {
d35afa87	340	serial_close(devc->serial);
7dc55d93 AG	341	sdi->status = SR_ST_INACTIVE;
	342	}
	343
	344	return SR_OK;
	345	}
	346
	347	static int hw_cleanup(void)
	348	{
	349	clear_instances();
	350
	351	return SR_OK;
	352	}
	353
	354	static int hw_info_get(int info_id, const void **data,
bbabddbd	355	const struct sr_dev_inst *sdi)
7dc55d93	356	{
bbabddbd	357	(void)sdi;
7dc55d93 AG	358
	359	switch (info_id) {
	360	case SR_DI_HWOPTS:
	361	*data = hwopts;
	362	break;
	363	case SR_DI_HWCAPS:
	364	*data = hwcaps;
	365	break;
	366	case SR_DI_NUM_PROBES:
	367	*data = GINT_TO_POINTER(1);
	368	break;
	369	case SR_DI_PROBE_NAMES:
	370	*data = probe_names;
	371	break;
	372	default:
	373	return SR_ERR_ARG;
	374	}
	375
	376	return SR_OK;
	377	}
	378
	379	static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
bbabddbd	380	const void *value)
7dc55d93 AG	381	{
	382	struct dev_context *devc;
	383
	384	if (sdi->status != SR_ST_ACTIVE)
	385	return SR_ERR;
	386
	387	if (!(devc = sdi->priv)) {
	388	sr_err("sdi->priv was NULL.");
	389	return SR_ERR_BUG;
	390	}
	391
	392	switch (hwcap) {
	393	case SR_HWCAP_LIMIT_SAMPLES:
	394	devc->limit_samples = (const uint64_t )value;
	395	sr_dbg("Setting sample limit to %" PRIu64 ".",
	396	devc->limit_samples);
	397	break;
	398	default:
	399	sr_err("Unknown capability: %d.", hwcap);
	400	return SR_ERR;
	401	break;
	402	}
	403
	404	return SR_OK;
	405	}
	406
	407	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
bbabddbd	408	void *cb_data)
7dc55d93 AG	409	{
	410	struct sr_datafeed_packet packet;
	411	struct sr_datafeed_header header;
	412	struct sr_datafeed_meta_analog meta;
	413	struct dev_context *devc;
729b01f9	414	int (receive_data)(int, int, void ) = NULL;
7dc55d93 AG	415
	416	if (!(devc = sdi->priv)) {
	417	sr_err("sdi->priv was NULL.");
	418	return SR_ERR_BUG;
	419	}
	420
	421	sr_dbg("Starting acquisition.");
	422
	423	devc->cb_data = cb_data;
	424
bbabddbd UH	425	/*
bbabddbd UH	426	* Reset the number of samples to take. If we've already collected our
7dc55d93	427	* quota, but we start a new session, and don't reset this, we'll just
bbabddbd UH	428	* quit without acquiring any new samples.
bbabddbd UH	429	*/
7dc55d93 AG	430	devc->num_samples = 0;
	431
	432	/* Send header packet to the session bus. */
	433	sr_dbg("Sending SR_DF_HEADER.");
	434	packet.type = SR_DF_HEADER;
	435	packet.payload = (uint8_t *)&header;
	436	header.feed_version = 1;
	437	gettimeofday(&header.starttime, NULL);
	438	sr_session_send(devc->cb_data, &packet);
	439
	440	/* Send metadata about the SR_DF_ANALOG packets to come. */
	441	sr_dbg("Sending SR_DF_META_ANALOG.");
	442	packet.type = SR_DF_META_ANALOG;
	443	packet.payload = &meta;
	444	meta.num_probes = 1;
	445	sr_session_send(devc->cb_data, &packet);
	446
f086b830 UH	447	if (!strcmp(di->name, "digitek-dt4000zc"))
f086b830 UH	448	receive_data = digitek_dt4000zc_receive_data;
729b01f9 UH	449	if (!strcmp(di->name, "tekpower-tp4000zc"))
729b01f9 UH	450	receive_data = tekpower_tp4000zc_receive_data;
ce3777ad UH	451	if (!strcmp(di->name, "metex-me31"))
ce3777ad UH	452	receive_data = metex_me31_receive_data;
f0ac4929 UH	453	if (!strcmp(di->name, "peaktech-3410"))
f0ac4929 UH	454	receive_data = peaktech_3410_receive_data;
5887c9cc UH	455	if (!strcmp(di->name, "mastech-mas345"))
5887c9cc UH	456	receive_data = mastech_mas345_receive_data;
729b01f9	457
bbabddbd	458	/* Poll every 50ms, or whenever some data comes in. */
7dc55d93	459	sr_source_add(devc->serial->fd, G_IO_IN, 50,
729b01f9	460	receive_data, (void *)sdi);
7dc55d93 AG	461
	462	return SR_OK;
	463	}
	464
69b07d14	465	static int hw_dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
7dc55d93 AG	466	{
	467	struct sr_datafeed_packet packet;
	468	struct dev_context *devc;
	469
	470	if (sdi->status != SR_ST_ACTIVE)
	471	return SR_ERR;
	472
	473	if (!(devc = sdi->priv)) {
	474	sr_err("sdi->priv was NULL.");
	475	return SR_ERR_BUG;
	476	}
	477
	478	sr_dbg("Stopping acquisition.");
	479
	480	sr_source_remove(devc->serial->fd);
	481	hw_dev_close((struct sr_dev_inst *)sdi);
	482
	483	/* Send end packet to the session bus. */
	484	sr_dbg("Sending SR_DF_END.");
	485	packet.type = SR_DF_END;
	486	sr_session_send(cb_data, &packet);
	487
	488	return SR_OK;
	489	}
	490
f086b830 UH	491	SR_PRIV struct sr_dev_driver digitek_dt4000zc_driver_info = {
	492	.name = "digitek-dt4000zc",
	493	.longname = "Digitek DT4000ZC",
	494	.api_version = 1,
	495	.init = hw_init_digitek_dt4000zc,
	496	.cleanup = hw_cleanup,
	497	.scan = hw_scan,
	498	.dev_list = hw_dev_list,
	499	.dev_clear = clear_instances,
	500	.dev_open = hw_dev_open,
	501	.dev_close = hw_dev_close,
	502	.info_get = hw_info_get,
	503	.dev_config_set = hw_dev_config_set,
	504	.dev_acquisition_start = hw_dev_acquisition_start,
	505	.dev_acquisition_stop = hw_dev_acquisition_stop,
	506	.priv = NULL,
	507	};
	508
729b01f9 UH	509	SR_PRIV struct sr_dev_driver tekpower_tp4000zc_driver_info = {
	510	.name = "tekpower-tp4000zc",
	511	.longname = "TekPower TP4000ZC",
7dc55d93	512	.api_version = 1,
729b01f9	513	.init = hw_init_tekpower_tp4000zc,
7dc55d93 AG	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	};
ce3777ad UH	526
	527	SR_PRIV struct sr_dev_driver metex_me31_driver_info = {
	528	.name = "metex-me31",
	529	.longname = "Metex ME-31",
	530	.api_version = 1,
	531	.init = hw_init_metex_me31,
	532	.cleanup = hw_cleanup,
	533	.scan = hw_scan,
	534	.dev_list = hw_dev_list,
	535	.dev_clear = clear_instances,
	536	.dev_open = hw_dev_open,
	537	.dev_close = hw_dev_close,
	538	.info_get = hw_info_get,
	539	.dev_config_set = hw_dev_config_set,
	540	.dev_acquisition_start = hw_dev_acquisition_start,
	541	.dev_acquisition_stop = hw_dev_acquisition_stop,
	542	.priv = NULL,
	543	};
f0ac4929 UH	544
	545	SR_PRIV struct sr_dev_driver peaktech_3410_driver_info = {
	546	.name = "peaktech-3410",
	547	.longname = "PeakTech 3410",
	548	.api_version = 1,
	549	.init = hw_init_peaktech_3410,
	550	.cleanup = hw_cleanup,
	551	.scan = hw_scan,
	552	.dev_list = hw_dev_list,
	553	.dev_clear = clear_instances,
	554	.dev_open = hw_dev_open,
	555	.dev_close = hw_dev_close,
	556	.info_get = hw_info_get,
	557	.dev_config_set = hw_dev_config_set,
	558	.dev_acquisition_start = hw_dev_acquisition_start,
	559	.dev_acquisition_stop = hw_dev_acquisition_stop,
	560	.priv = NULL,
	561	};
5887c9cc UH	562
	563	SR_PRIV struct sr_dev_driver mastech_mas345_driver_info = {
	564	.name = "mastech-mas345",
	565	.longname = "MASTECH MAS345",
	566	.api_version = 1,
	567	.init = hw_init_mastech_mas345,
	568	.cleanup = hw_cleanup,
	569	.scan = hw_scan,
	570	.dev_list = hw_dev_list,
	571	.dev_clear = clear_instances,
	572	.dev_open = hw_dev_open,
	573	.dev_close = hw_dev_close,
	574	.info_get = hw_info_get,
	575	.dev_config_set = hw_dev_config_set,
	576	.dev_acquisition_start = hw_dev_acquisition_start,
	577	.dev_acquisition_stop = hw_dev_acquisition_stop,
	578	.priv = NULL,
	579	};