[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;

static struct sr_dev_driver *di_digitek_dt4000zc = &digitek_dt4000zc_driver_info;
static struct sr_dev_driver *di_tekpower_tp4000zc = &tekpower_tp4000zc_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,
		sr_fs9721_packet_valid,
		sr_fs9721_parse,
		dmm_details_dt4000zc,
	},
	{
		"TekPower", "TP4000ZC",
		"2400/8n1", 2400,
		FS9721_PACKET_SIZE,
		sr_fs9721_packet_valid,
		sr_fs9721_parse,
		dmm_details_tp4000zc,
	},
};

/* 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_digitek_dt4000zc;
	if (dmm == TEKPOWER_TP4000ZC)
		di = di_tekpower_tp4000zc;
	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 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_RDONLY | SERIAL_NONBLOCK) != SR_OK)
		return NULL;

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

	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 (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_RDONLY) != 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;

	/* 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,
};
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;
f086b830 UH	52
f086b830 UH	53	static struct sr_dev_driver *di_digitek_dt4000zc = &digitek_dt4000zc_driver_info;
729b01f9 UH	54	static struct sr_dev_driver *di_tekpower_tp4000zc = &tekpower_tp4000zc_driver_info;
	55
	56	/* After hw_init() this will point to a device-specific entry (see above). */
	57	static struct sr_dev_driver *di = NULL;
	58
	59	SR_PRIV struct dmm_info dmms[] = {
f086b830 UH	60	{
	61	"Digitek", "DT4000ZC",
	62	"2400/8n1", 2400,
	63	FS9721_PACKET_SIZE,
	64	sr_fs9721_packet_valid,
	65	sr_fs9721_parse,
	66	dmm_details_dt4000zc,
	67	},
729b01f9 UH	68	{
	69	"TekPower", "TP4000ZC",
	70	"2400/8n1", 2400,
	71	FS9721_PACKET_SIZE,
	72	sr_fs9721_packet_valid,
	73	sr_fs9721_parse,
	74	dmm_details_tp4000zc,
	75	},
	76	};
7dc55d93 AG	77
	78	/* Properly close and free all devices. */
	79	static int clear_instances(void)
	80	{
	81	struct sr_dev_inst *sdi;
	82	struct drv_context *drvc;
	83	struct dev_context *devc;
	84	GSList *l;
	85
	86	if (!(drvc = di->priv))
	87	return SR_OK;
	88
	89	drvc = di->priv;
	90	for (l = drvc->instances; l; l = l->next) {
	91	if (!(sdi = l->data))
	92	continue;
	93	if (!(devc = sdi->priv))
	94	continue;
	95	sr_serial_dev_inst_free(devc->serial);
	96	sr_dev_inst_free(sdi);
	97	}
	98	g_slist_free(drvc->instances);
	99	drvc->instances = NULL;
	100
	101	return SR_OK;
	102	}
	103
729b01f9	104	static int hw_init(int dmm)
7dc55d93 AG	105	{
	106	struct drv_context *drvc;
	107
	108	if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
bbabddbd UH	109	sr_err("Driver context malloc failed.");
bbabddbd UH	110	return SR_ERR_MALLOC;
7dc55d93 AG	111	}
7dc55d93 AG	112
f086b830 UH	113	if (dmm == DIGITEK_DT4000ZC)
f086b830 UH	114	di = di_digitek_dt4000zc;
729b01f9 UH	115	if (dmm == TEKPOWER_TP4000ZC)
	116	di = di_tekpower_tp4000zc;
	117	sr_dbg("Selected '%s' subdriver.", di->name);
	118
7dc55d93 AG	119	di->priv = drvc;
	120
	121	return SR_OK;
	122	}
	123
f086b830 UH	124	static int hw_init_digitek_dt4000zc(void)
	125	{
	126	return hw_init(DIGITEK_DT4000ZC);
	127	}
	128
729b01f9 UH	129	static int hw_init_tekpower_tp4000zc(void)
	130	{
	131	return hw_init(TEKPOWER_TP4000ZC);
	132	}
	133
	134	static GSList scan(const char conn, const char *serialcomm, int dmm)
7dc55d93 AG	135	{
	136	struct sr_dev_inst *sdi;
	137	struct drv_context *drvc;
	138	struct dev_context *devc;
	139	struct sr_probe *probe;
d35afa87	140	struct sr_serial_dev_inst *serial;
7dc55d93	141	GSList *devices;
2546b05c AG	142	int dropped, ret;
	143	size_t len;
	144	uint8_t buf[128];
7dc55d93	145
d35afa87	146	if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
7dc55d93	147	return NULL;
d35afa87	148
a54dd31e	149	if (serial_open(serial, SERIAL_RDONLY \| SERIAL_NONBLOCK) != SR_OK)
7dc55d93	150	return NULL;
7dc55d93	151
bbabddbd	152	sr_info("Probing port %s readonly.", conn);
7dc55d93 AG	153
7dc55d93 AG	154	drvc = di->priv;
7dc55d93	155	devices = NULL;
d35afa87	156	serial_flush(serial);
bbabddbd UH	157
	158	/*
	159	* There's no way to get an ID from the multimeter. It just sends data
	160	* periodically, so the best we can do is check if the packets match
	161	* the expected format.
	162	*/
7dc55d93	163
2546b05c AG	164	/* Let's get a bit of data and see if we can find a packet. */
2546b05c AG	165	len = sizeof(buf);
7dc55d93	166
729b01f9 UH	167	ret = serial_stream_detect(serial, buf, &len, dmms[dmm].packet_size,
	168	dmms[dmm].packet_valid, 1000,
	169	dmms[dmm].baudrate);
2546b05c AG	170	if (ret != SR_OK)
2546b05c AG	171	goto scan_cleanup;
7dc55d93	172
2546b05c AG	173	/*
	174	* If we dropped more than two packets worth of data, something is
	175	* wrong. We shouldn't quit however, since the dropped bytes might be
	176	* just zeroes at the beginning of the stream. Those can occur as a
	177	* combination of the nonstandard cable that ships with this device and
	178	* the serial port or USB to serial adapter.
	179	*/
729b01f9 UH	180	dropped = len - dmms[dmm].packet_size;
729b01f9 UH	181	if (dropped > 2 * dmms[dmm].packet_size)
6bef68a7	182	sr_warn("Had to drop too much data.");
7dc55d93	183
2546b05c	184	sr_info("Found device on port %s.", conn);
7dc55d93	185
729b01f9 UH	186	if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, dmms[dmm].vendor,
729b01f9 UH	187	dmms[dmm].device, "")))
2546b05c	188	goto scan_cleanup;
6bef68a7	189
2546b05c AG	190	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
	191	sr_err("Device context malloc failed.");
	192	goto scan_cleanup;
7dc55d93 AG	193	}
7dc55d93 AG	194
2546b05c AG	195	devc->serial = serial;
	196
	197	sdi->priv = devc;
	198	sdi->driver = di;
	199	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
	200	goto scan_cleanup;
	201	sdi->probes = g_slist_append(sdi->probes, probe);
	202	drvc->instances = g_slist_append(drvc->instances, sdi);
	203	devices = g_slist_append(devices, sdi);
	204
	205	scan_cleanup:
d35afa87	206	serial_close(serial);
2546b05c	207
7dc55d93 AG	208	return devices;
	209	}
	210
	211	static GSList hw_scan(GSList options)
	212	{
	213	struct sr_hwopt *opt;
	214	GSList l, devices;
	215	const char conn, serialcomm;
729b01f9	216	int dmm;
7dc55d93 AG	217
	218	conn = serialcomm = NULL;
	219	for (l = options; l; l = l->next) {
	220	opt = l->data;
	221	switch (opt->hwopt) {
	222	case SR_HWOPT_CONN:
	223	conn = opt->value;
	224	break;
	225	case SR_HWOPT_SERIALCOMM:
	226	serialcomm = opt->value;
	227	break;
	228	}
	229	}
	230	if (!conn)
	231	return NULL;
	232
f086b830	233	if (!strcmp(di->name, "digitek-dt4000zc"))
729b01f9	234	dmm = 0;
f086b830 UH	235	if (!strcmp(di->name, "tekpower-tp4000zc"))
f086b830 UH	236	dmm = 1;
729b01f9	237
7dc55d93 AG	238	if (serialcomm) {
7dc55d93 AG	239	/* Use the provided comm specs. */
729b01f9	240	devices = scan(conn, serialcomm, dmm);
7dc55d93	241	} else {
d35afa87	242	/* Try the default. */
729b01f9	243	devices = scan(conn, dmms[dmm].conn, dmm);
7dc55d93 AG	244	}
	245
	246	return devices;
	247	}
	248
	249	static GSList *hw_dev_list(void)
	250	{
	251	struct drv_context *drvc;
	252
	253	drvc = di->priv;
	254
	255	return drvc->instances;
	256	}
	257
	258	static int hw_dev_open(struct sr_dev_inst *sdi)
	259	{
	260	struct dev_context *devc;
	261
	262	if (!(devc = sdi->priv)) {
	263	sr_err("sdi->priv was NULL.");
	264	return SR_ERR_BUG;
	265	}
	266
a54dd31e	267	if (serial_open(devc->serial, SERIAL_RDONLY) != SR_OK)
7dc55d93	268	return SR_ERR;
bbabddbd	269
7dc55d93 AG	270	sdi->status = SR_ST_ACTIVE;
	271
	272	return SR_OK;
	273	}
	274
	275	static int hw_dev_close(struct sr_dev_inst *sdi)
	276	{
	277	struct dev_context *devc;
	278
	279	if (!(devc = sdi->priv)) {
	280	sr_err("sdi->priv was NULL.");
	281	return SR_ERR_BUG;
	282	}
	283
	284	if (devc->serial && devc->serial->fd != -1) {
d35afa87	285	serial_close(devc->serial);
7dc55d93 AG	286	sdi->status = SR_ST_INACTIVE;
	287	}
	288
	289	return SR_OK;
	290	}
	291
	292	static int hw_cleanup(void)
	293	{
	294	clear_instances();
	295
	296	return SR_OK;
	297	}
	298
	299	static int hw_info_get(int info_id, const void **data,
bbabddbd	300	const struct sr_dev_inst *sdi)
7dc55d93	301	{
bbabddbd	302	(void)sdi;
7dc55d93 AG	303
	304	switch (info_id) {
	305	case SR_DI_HWOPTS:
	306	*data = hwopts;
	307	break;
	308	case SR_DI_HWCAPS:
	309	*data = hwcaps;
	310	break;
	311	case SR_DI_NUM_PROBES:
	312	*data = GINT_TO_POINTER(1);
	313	break;
	314	case SR_DI_PROBE_NAMES:
	315	*data = probe_names;
	316	break;
	317	default:
	318	return SR_ERR_ARG;
	319	}
	320
	321	return SR_OK;
	322	}
	323
	324	static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
bbabddbd	325	const void *value)
7dc55d93 AG	326	{
	327	struct dev_context *devc;
	328
	329	if (sdi->status != SR_ST_ACTIVE)
	330	return SR_ERR;
	331
	332	if (!(devc = sdi->priv)) {
	333	sr_err("sdi->priv was NULL.");
	334	return SR_ERR_BUG;
	335	}
	336
	337	switch (hwcap) {
	338	case SR_HWCAP_LIMIT_SAMPLES:
	339	devc->limit_samples = (const uint64_t )value;
	340	sr_dbg("Setting sample limit to %" PRIu64 ".",
	341	devc->limit_samples);
	342	break;
	343	default:
	344	sr_err("Unknown capability: %d.", hwcap);
	345	return SR_ERR;
	346	break;
	347	}
	348
	349	return SR_OK;
	350	}
	351
	352	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
bbabddbd	353	void *cb_data)
7dc55d93 AG	354	{
	355	struct sr_datafeed_packet packet;
	356	struct sr_datafeed_header header;
	357	struct sr_datafeed_meta_analog meta;
	358	struct dev_context *devc;
729b01f9	359	int (receive_data)(int, int, void ) = NULL;
7dc55d93 AG	360
	361	if (!(devc = sdi->priv)) {
	362	sr_err("sdi->priv was NULL.");
	363	return SR_ERR_BUG;
	364	}
	365
	366	sr_dbg("Starting acquisition.");
	367
	368	devc->cb_data = cb_data;
	369
bbabddbd UH	370	/*
bbabddbd UH	371	* Reset the number of samples to take. If we've already collected our
7dc55d93	372	* quota, but we start a new session, and don't reset this, we'll just
bbabddbd UH	373	* quit without acquiring any new samples.
bbabddbd UH	374	*/
7dc55d93 AG	375	devc->num_samples = 0;
	376
	377	/* Send header packet to the session bus. */
	378	sr_dbg("Sending SR_DF_HEADER.");
	379	packet.type = SR_DF_HEADER;
	380	packet.payload = (uint8_t *)&header;
	381	header.feed_version = 1;
	382	gettimeofday(&header.starttime, NULL);
	383	sr_session_send(devc->cb_data, &packet);
	384
	385	/* Send metadata about the SR_DF_ANALOG packets to come. */
	386	sr_dbg("Sending SR_DF_META_ANALOG.");
	387	packet.type = SR_DF_META_ANALOG;
	388	packet.payload = &meta;
	389	meta.num_probes = 1;
	390	sr_session_send(devc->cb_data, &packet);
	391
f086b830 UH	392	if (!strcmp(di->name, "digitek-dt4000zc"))
f086b830 UH	393	receive_data = digitek_dt4000zc_receive_data;
729b01f9 UH	394	if (!strcmp(di->name, "tekpower-tp4000zc"))
	395	receive_data = tekpower_tp4000zc_receive_data;
	396
bbabddbd	397	/* Poll every 50ms, or whenever some data comes in. */
7dc55d93	398	sr_source_add(devc->serial->fd, G_IO_IN, 50,
729b01f9	399	receive_data, (void *)sdi);
7dc55d93 AG	400
	401	return SR_OK;
	402	}
	403
69b07d14	404	static int hw_dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
7dc55d93 AG	405	{
	406	struct sr_datafeed_packet packet;
	407	struct dev_context *devc;
	408
	409	if (sdi->status != SR_ST_ACTIVE)
	410	return SR_ERR;
	411
	412	if (!(devc = sdi->priv)) {
	413	sr_err("sdi->priv was NULL.");
	414	return SR_ERR_BUG;
	415	}
	416
	417	sr_dbg("Stopping acquisition.");
	418
	419	sr_source_remove(devc->serial->fd);
	420	hw_dev_close((struct sr_dev_inst *)sdi);
	421
	422	/* Send end packet to the session bus. */
	423	sr_dbg("Sending SR_DF_END.");
	424	packet.type = SR_DF_END;
	425	sr_session_send(cb_data, &packet);
	426
	427	return SR_OK;
	428	}
	429
f086b830 UH	430	SR_PRIV struct sr_dev_driver digitek_dt4000zc_driver_info = {
	431	.name = "digitek-dt4000zc",
	432	.longname = "Digitek DT4000ZC",
	433	.api_version = 1,
	434	.init = hw_init_digitek_dt4000zc,
	435	.cleanup = hw_cleanup,
	436	.scan = hw_scan,
	437	.dev_list = hw_dev_list,
	438	.dev_clear = clear_instances,
	439	.dev_open = hw_dev_open,
	440	.dev_close = hw_dev_close,
	441	.info_get = hw_info_get,
	442	.dev_config_set = hw_dev_config_set,
	443	.dev_acquisition_start = hw_dev_acquisition_start,
	444	.dev_acquisition_stop = hw_dev_acquisition_stop,
	445	.priv = NULL,
	446	};
	447
729b01f9 UH	448	SR_PRIV struct sr_dev_driver tekpower_tp4000zc_driver_info = {
	449	.name = "tekpower-tp4000zc",
	450	.longname = "TekPower TP4000ZC",
7dc55d93	451	.api_version = 1,
729b01f9	452	.init = hw_init_tekpower_tp4000zc,
7dc55d93 AG	453	.cleanup = hw_cleanup,
	454	.scan = hw_scan,
	455	.dev_list = hw_dev_list,
	456	.dev_clear = clear_instances,
	457	.dev_open = hw_dev_open,
	458	.dev_close = hw_dev_close,
	459	.info_get = hw_info_get,
	460	.dev_config_set = hw_dev_config_set,
	461	.dev_acquisition_start = hw_dev_acquisition_start,
	462	.dev_acquisition_stop = hw_dev_acquisition_stop,
	463	.priv = NULL,
	464	};