[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;

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;

/* 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,
	},
};

/* 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;
	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 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 (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;

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