[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;
SR_PRIV struct sr_dev_driver va_va18b_driver_info;
SR_PRIV struct sr_dev_driver metex_m3640d_driver_info;
SR_PRIV struct sr_dev_driver peaktech_4370_driver_info;
SR_PRIV struct sr_dev_driver pce_pce_dm32_driver_info;
SR_PRIV struct sr_dev_driver radioshack_22_168_driver_info;
SR_PRIV struct sr_dev_driver radioshack_22_812_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,
		&digitek_dt4000zc_driver_info, receive_data_DIGITEK_DT4000ZC,
	},
	{
		"TekPower", "TP4000ZC", "2400/8n1", 2400,
		FS9721_PACKET_SIZE, NULL,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		dmm_details_tp4000zc,
		&tekpower_tp4000zc_driver_info, receive_data_TEKPOWER_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,
		&metex_me31_driver_info, receive_data_METEX_ME31,
	},
	{
		"Peaktech", "3410", "600/7n2/rts=0/dtr=1", 600,
		METEX14_PACKET_SIZE, sr_metex14_packet_request,
		sr_metex14_packet_valid, sr_metex14_parse,
		NULL,
		&peaktech_3410_driver_info, receive_data_PEAKTECH_3410,
	},
	{
		"MASTECH", "MAS345", "600/7n2/rts=0/dtr=1", 600,
		METEX14_PACKET_SIZE, sr_metex14_packet_request,
		sr_metex14_packet_valid, sr_metex14_parse,
		NULL,
		&mastech_mas345_driver_info, receive_data_MASTECH_MAS345,
	},
	{
		"V&A", "VA18B", "2400/8n1", 2400,
		FS9721_PACKET_SIZE, NULL,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		dmm_details_va18b,
		&va_va18b_driver_info, receive_data_VA_VA18B,
	},
	{
		"Metex", "M-3640D", "1200/7n2/rts=0/dtr=1", 1200,
		METEX14_PACKET_SIZE, sr_metex14_packet_request,
		sr_metex14_packet_valid, sr_metex14_parse,
		NULL,
		&metex_m3640d_driver_info, receive_data_METEX_M3640D,
	},
	{
		"PeakTech", "4370", "1200/7n2/rts=0/dtr=1", 1200,
		METEX14_PACKET_SIZE, sr_metex14_packet_request,
		sr_metex14_packet_valid, sr_metex14_parse,
		NULL,
		&peaktech_4370_driver_info, receive_data_PEAKTECH_4370,
	},
	{
		"PCE", "PCE-DM32", "2400/8n1", 2400,
		FS9721_PACKET_SIZE, NULL,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		dmm_details_pce_dm32,
		&pce_pce_dm32_driver_info, receive_data_PCE_PCE_DM32,
	},
	{
		"RadioShack", "22-168", "1200/7n2/rts=0/dtr=1", 1200,
		METEX14_PACKET_SIZE, sr_metex14_packet_request,
		sr_metex14_packet_valid, sr_metex14_parse,
		NULL,
		&radioshack_22_168_driver_info, receive_data_RADIOSHACK_22_168,
	},
	{
		"RadioShack", "22-812", "4800/8n1/rts=0/dtr=1", 4800,
		RS9LCD_PACKET_SIZE, NULL,
		sr_rs9lcd_packet_valid, sr_rs9lcd_parse,
		NULL,
		&radioshack_22_812_driver_info, receive_data_RADIOSHACK_22_812,
	},
};

/* Properly close and free all devices. */
static int clear_instances(int dmm)
{
	struct sr_dev_inst *sdi;
	struct drv_context *drvc;
	struct dev_context *devc;
	GSList *l;
	struct sr_dev_driver *di;

	di = dmms[dmm].di;

	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;
}

/* Driver-specific clear_instances() function wrappers */
#define CLEAR_INSTANCES(X) static int clear_instances_##X(void) \
					{ return clear_instances(X); }
CLEAR_INSTANCES(DIGITEK_DT4000ZC)
CLEAR_INSTANCES(TEKPOWER_TP4000ZC)
CLEAR_INSTANCES(METEX_ME31)
CLEAR_INSTANCES(PEAKTECH_3410)
CLEAR_INSTANCES(MASTECH_MAS345)
CLEAR_INSTANCES(VA_VA18B)
CLEAR_INSTANCES(METEX_M3640D)
CLEAR_INSTANCES(PEAKTECH_4370)
CLEAR_INSTANCES(PCE_PCE_DM32)
CLEAR_INSTANCES(RADIOSHACK_22_168)
CLEAR_INSTANCES(RADIOSHACK_22_812)

static int hw_init(struct sr_context *sr_ctx, 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;
	}

	di = dmms[dmm].di;
	sr_dbg("Selected '%s' subdriver.", dmms[dmm].di->name);

	drvc->sr_ctx = sr_ctx;
	//// di->priv = drvc;
	dmms[dmm].di->priv = drvc;

	return SR_OK;
}

/* Driver-specific hw_init() function wrappers */
#define HW_INIT(X) static int hw_init_##X(struct sr_context *sr_ctx) \
				{ return hw_init(sr_ctx, X); }
HW_INIT(DIGITEK_DT4000ZC)
HW_INIT(TEKPOWER_TP4000ZC)
HW_INIT(METEX_ME31)
HW_INIT(PEAKTECH_3410)
HW_INIT(MASTECH_MAS345)
HW_INIT(VA_VA18B)
HW_INIT(METEX_M3640D)
HW_INIT(PEAKTECH_4370)
HW_INIT(PCE_PCE_DM32)
HW_INIT(RADIOSHACK_22_168)
HW_INIT(RADIOSHACK_22_812)

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;
	drvc = dmms[dmm].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 = dmms[dmm].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, int dmm)
{
	struct sr_hwopt *opt;
	GSList *l, *devices;
	const char *conn, *serialcomm;

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

	return devices;
}

/* Driver-specific hw_scan() function wrappers */
#define HW_SCAN(X) static GSList *hw_scan_##X(GSList *options) \
				{ return hw_scan(options, X); }
HW_SCAN(DIGITEK_DT4000ZC)
HW_SCAN(TEKPOWER_TP4000ZC)
HW_SCAN(METEX_ME31)
HW_SCAN(PEAKTECH_3410)
HW_SCAN(MASTECH_MAS345)
HW_SCAN(VA_VA18B)
HW_SCAN(METEX_M3640D)
HW_SCAN(PEAKTECH_4370)
HW_SCAN(PCE_PCE_DM32)
HW_SCAN(RADIOSHACK_22_168)
HW_SCAN(RADIOSHACK_22_812)

static GSList *hw_dev_list(int dmm)
{
	struct drv_context *drvc;

	drvc = dmms[dmm].di->priv;

	return drvc->instances;
}

/* Driver-specific hw_dev_list() function wrappers */
#define HW_DEV_LIST(X) static GSList *hw_dev_list_##X(void) \
				{ return hw_dev_list(X); }
HW_DEV_LIST(DIGITEK_DT4000ZC)
HW_DEV_LIST(TEKPOWER_TP4000ZC)
HW_DEV_LIST(METEX_ME31)
HW_DEV_LIST(PEAKTECH_3410)
HW_DEV_LIST(MASTECH_MAS345)
HW_DEV_LIST(VA_VA18B)
HW_DEV_LIST(METEX_M3640D)
HW_DEV_LIST(PEAKTECH_4370)
HW_DEV_LIST(PCE_PCE_DM32)
HW_DEV_LIST(RADIOSHACK_22_168)
HW_DEV_LIST(RADIOSHACK_22_812)

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(int dmm)
{
	clear_instances(dmm);

	return SR_OK;
}

/* Driver-specific hw_cleanup() function wrappers */
#define HW_CLEANUP(X) static int hw_cleanup_##X(void) { return hw_cleanup(X); }
HW_CLEANUP(DIGITEK_DT4000ZC)
HW_CLEANUP(TEKPOWER_TP4000ZC)
HW_CLEANUP(METEX_ME31)
HW_CLEANUP(PEAKTECH_3410)
HW_CLEANUP(MASTECH_MAS345)
HW_CLEANUP(VA_VA18B)
HW_CLEANUP(METEX_M3640D)
HW_CLEANUP(PEAKTECH_4370)
HW_CLEANUP(PCE_PCE_DM32)
HW_CLEANUP(RADIOSHACK_22_168)
HW_CLEANUP(RADIOSHACK_22_812)

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;

	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);

	/* Poll every 50ms, or whenever some data comes in. */
	sr_source_add(devc->serial->fd, G_IO_IN, 50,
		      dmms[sdi->driver->subdriver].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;
}

/* Driver structs */
#define DRV(ID, ID_UPPER, NAME, LONGNAME) \
SR_PRIV struct sr_dev_driver ID##_driver_info = { \
	.name = NAME, \
	.longname = LONGNAME, \
	.api_version = 1, \
	.init = hw_init_##ID_UPPER, \
	.cleanup = hw_cleanup_##ID_UPPER, \
	.scan = hw_scan_##ID_UPPER, \
	.dev_list = hw_dev_list_##ID_UPPER, \
	.dev_clear = clear_instances_##ID_UPPER, \
	.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, \
	.subdriver = ID_UPPER, \
};
DRV(digitek_dt4000zc, DIGITEK_DT4000ZC, "digitek-dt4000zc", "Digitek DT4000ZC")
DRV(tekpower_tp4000zc, TEKPOWER_TP4000ZC, "tekpower-tp4000zc", "TekPower TP4000ZC")
DRV(metex_me31, METEX_ME31, "metex-me31", "Metex ME-31")
DRV(peaktech_3410, PEAKTECH_3410, "peaktech-3410", "PeakTech 3410")
DRV(mastech_mas345, MASTECH_MAS345, "mastech-mas345", "MASTECH MAS345")
DRV(va_va18b, VA_VA18B, "va-va18b", "V&A VA18B")
DRV(metex_m3640d, METEX_M3640D, "metex-m3640d", "Metex M-3640D")
DRV(peaktech_4370, PEAKTECH_4370, "peaktech-4370", "PeakTech 4370")
DRV(pce_pce_dm32, PCE_PCE_DM32, "pce-pce-dm32", "PCE PCE-DM32")
DRV(radioshack_22_168, RADIOSHACK_22_168, "radioshack-22-168", "RadioShack 22-168")
DRV(radioshack_22_812, RADIOSHACK_22_812, "radioshack-22-812", "RadioShack 22-812")
Commit	Line	Data
	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>
	6	* Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
	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>
	23	#include <sys/types.h>
	24	#include <sys/stat.h>
	25	#include <fcntl.h>
	26	#include <string.h>
	27	#include <errno.h>
	28	#include "libsigrok.h"
	29	#include "libsigrok-internal.h"
	30	#include "protocol.h"
	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
	50	SR_PRIV struct sr_dev_driver digitek_dt4000zc_driver_info;
	51	SR_PRIV struct sr_dev_driver tekpower_tp4000zc_driver_info;
	52	SR_PRIV struct sr_dev_driver metex_me31_driver_info;
	53	SR_PRIV struct sr_dev_driver peaktech_3410_driver_info;
	54	SR_PRIV struct sr_dev_driver mastech_mas345_driver_info;
	55	SR_PRIV struct sr_dev_driver va_va18b_driver_info;
	56	SR_PRIV struct sr_dev_driver metex_m3640d_driver_info;
	57	SR_PRIV struct sr_dev_driver peaktech_4370_driver_info;
	58	SR_PRIV struct sr_dev_driver pce_pce_dm32_driver_info;
	59	SR_PRIV struct sr_dev_driver radioshack_22_168_driver_info;
	60	SR_PRIV struct sr_dev_driver radioshack_22_812_driver_info;
	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[] = {
	66	{
	67	"Digitek", "DT4000ZC", "2400/8n1", 2400,
	68	FS9721_PACKET_SIZE, NULL,
	69	sr_fs9721_packet_valid, sr_fs9721_parse,
	70	dmm_details_dt4000zc,
	71	&digitek_dt4000zc_driver_info, receive_data_DIGITEK_DT4000ZC,
	72	},
	73	{
	74	"TekPower", "TP4000ZC", "2400/8n1", 2400,
	75	FS9721_PACKET_SIZE, NULL,
	76	sr_fs9721_packet_valid, sr_fs9721_parse,
	77	dmm_details_tp4000zc,
	78	&tekpower_tp4000zc_driver_info, receive_data_TEKPOWER_TP4000ZC,
	79	},
	80	{
	81	"Metex", "ME-31", "600/7n2/rts=0/dtr=1", 600,
	82	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	83	sr_metex14_packet_valid, sr_metex14_parse,
	84	NULL,
	85	&metex_me31_driver_info, receive_data_METEX_ME31,
	86	},
	87	{
	88	"Peaktech", "3410", "600/7n2/rts=0/dtr=1", 600,
	89	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	90	sr_metex14_packet_valid, sr_metex14_parse,
	91	NULL,
	92	&peaktech_3410_driver_info, receive_data_PEAKTECH_3410,
	93	},
	94	{
	95	"MASTECH", "MAS345", "600/7n2/rts=0/dtr=1", 600,
	96	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	97	sr_metex14_packet_valid, sr_metex14_parse,
	98	NULL,
	99	&mastech_mas345_driver_info, receive_data_MASTECH_MAS345,
	100	},
	101	{
	102	"V&A", "VA18B", "2400/8n1", 2400,
	103	FS9721_PACKET_SIZE, NULL,
	104	sr_fs9721_packet_valid, sr_fs9721_parse,
	105	dmm_details_va18b,
	106	&va_va18b_driver_info, receive_data_VA_VA18B,
	107	},
	108	{
	109	"Metex", "M-3640D", "1200/7n2/rts=0/dtr=1", 1200,
	110	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	111	sr_metex14_packet_valid, sr_metex14_parse,
	112	NULL,
	113	&metex_m3640d_driver_info, receive_data_METEX_M3640D,
	114	},
	115	{
	116	"PeakTech", "4370", "1200/7n2/rts=0/dtr=1", 1200,
	117	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	118	sr_metex14_packet_valid, sr_metex14_parse,
	119	NULL,
	120	&peaktech_4370_driver_info, receive_data_PEAKTECH_4370,
	121	},
	122	{
	123	"PCE", "PCE-DM32", "2400/8n1", 2400,
	124	FS9721_PACKET_SIZE, NULL,
	125	sr_fs9721_packet_valid, sr_fs9721_parse,
	126	dmm_details_pce_dm32,
	127	&pce_pce_dm32_driver_info, receive_data_PCE_PCE_DM32,
	128	},
	129	{
	130	"RadioShack", "22-168", "1200/7n2/rts=0/dtr=1", 1200,
	131	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	132	sr_metex14_packet_valid, sr_metex14_parse,
	133	NULL,
	134	&radioshack_22_168_driver_info, receive_data_RADIOSHACK_22_168,
	135	},
	136	{
	137	"RadioShack", "22-812", "4800/8n1/rts=0/dtr=1", 4800,
	138	RS9LCD_PACKET_SIZE, NULL,
	139	sr_rs9lcd_packet_valid, sr_rs9lcd_parse,
	140	NULL,
	141	&radioshack_22_812_driver_info, receive_data_RADIOSHACK_22_812,
	142	},
	143	};
	144
	145	/* Properly close and free all devices. */
	146	static int clear_instances(int dmm)
	147	{
	148	struct sr_dev_inst *sdi;
	149	struct drv_context *drvc;
	150	struct dev_context *devc;
	151	GSList *l;
	152	struct sr_dev_driver *di;
	153
	154	di = dmms[dmm].di;
	155
	156	if (!(drvc = di->priv))
	157	return SR_OK;
	158
	159	drvc = di->priv;
	160	for (l = drvc->instances; l; l = l->next) {
	161	if (!(sdi = l->data))
	162	continue;
	163	if (!(devc = sdi->priv))
	164	continue;
	165	sr_serial_dev_inst_free(devc->serial);
	166	sr_dev_inst_free(sdi);
	167	}
	168	g_slist_free(drvc->instances);
	169	drvc->instances = NULL;
	170
	171	return SR_OK;
	172	}
	173
	174	/* Driver-specific clear_instances() function wrappers */
	175	#define CLEAR_INSTANCES(X) static int clear_instances_##X(void) \
	176	{ return clear_instances(X); }
	177	CLEAR_INSTANCES(DIGITEK_DT4000ZC)
	178	CLEAR_INSTANCES(TEKPOWER_TP4000ZC)
	179	CLEAR_INSTANCES(METEX_ME31)
	180	CLEAR_INSTANCES(PEAKTECH_3410)
	181	CLEAR_INSTANCES(MASTECH_MAS345)
	182	CLEAR_INSTANCES(VA_VA18B)
	183	CLEAR_INSTANCES(METEX_M3640D)
	184	CLEAR_INSTANCES(PEAKTECH_4370)
	185	CLEAR_INSTANCES(PCE_PCE_DM32)
	186	CLEAR_INSTANCES(RADIOSHACK_22_168)
	187	CLEAR_INSTANCES(RADIOSHACK_22_812)
	188
	189	static int hw_init(struct sr_context *sr_ctx, int dmm)
	190	{
	191	struct drv_context *drvc;
	192
	193	if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
	194	sr_err("Driver context malloc failed.");
	195	return SR_ERR_MALLOC;
	196	}
	197
	198	di = dmms[dmm].di;
	199	sr_dbg("Selected '%s' subdriver.", dmms[dmm].di->name);
	200
	201	drvc->sr_ctx = sr_ctx;
	202	//// di->priv = drvc;
	203	dmms[dmm].di->priv = drvc;
	204
	205	return SR_OK;
	206	}
	207
	208	/* Driver-specific hw_init() function wrappers */
	209	#define HW_INIT(X) static int hw_init_##X(struct sr_context *sr_ctx) \
	210	{ return hw_init(sr_ctx, X); }
	211	HW_INIT(DIGITEK_DT4000ZC)
	212	HW_INIT(TEKPOWER_TP4000ZC)
	213	HW_INIT(METEX_ME31)
	214	HW_INIT(PEAKTECH_3410)
	215	HW_INIT(MASTECH_MAS345)
	216	HW_INIT(VA_VA18B)
	217	HW_INIT(METEX_M3640D)
	218	HW_INIT(PEAKTECH_4370)
	219	HW_INIT(PCE_PCE_DM32)
	220	HW_INIT(RADIOSHACK_22_168)
	221	HW_INIT(RADIOSHACK_22_812)
	222
	223	static GSList scan(const char conn, const char *serialcomm, int dmm)
	224	{
	225	struct sr_dev_inst *sdi;
	226	struct drv_context *drvc;
	227	struct dev_context *devc;
	228	struct sr_probe *probe;
	229	struct sr_serial_dev_inst *serial;
	230	GSList *devices;
	231	int dropped, ret;
	232	size_t len;
	233	uint8_t buf[128];
	234
	235	if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
	236	return NULL;
	237
	238	if (serial_open(serial, SERIAL_RDWR \| SERIAL_NONBLOCK) != SR_OK)
	239	return NULL;
	240
	241	sr_info("Probing port %s.", conn);
	242
	243	//// drvc = di->priv;
	244	drvc = dmms[dmm].di->priv;
	245	devices = NULL;
	246	serial_flush(serial);
	247
	248	/*
	249	* There's no way to get an ID from the multimeter. It just sends data
	250	* periodically, so the best we can do is check if the packets match
	251	* the expected format.
	252	*/
	253
	254	/* Let's get a bit of data and see if we can find a packet. */
	255	len = sizeof(buf);
	256
	257	/* Request a packet if the DMM requires this. */
	258	if (dmms[dmm].packet_request) {
	259	if ((ret = dmms[dmm].packet_request(serial)) < 0) {
	260	sr_err("Failed to request packet: %d.", ret);
	261	return FALSE;
	262	}
	263	}
	264
	265	ret = serial_stream_detect(serial, buf, &len, dmms[dmm].packet_size,
	266	dmms[dmm].packet_valid, 1000,
	267	dmms[dmm].baudrate);
	268	if (ret != SR_OK)
	269	goto scan_cleanup;
	270
	271	/*
	272	* If we dropped more than two packets worth of data, something is
	273	* wrong. We shouldn't quit however, since the dropped bytes might be
	274	* just zeroes at the beginning of the stream. Those can occur as a
	275	* combination of the nonstandard cable that ships with this device and
	276	* the serial port or USB to serial adapter.
	277	*/
	278	dropped = len - dmms[dmm].packet_size;
	279	if (dropped > 2 * dmms[dmm].packet_size)
	280	sr_warn("Had to drop too much data.");
	281
	282	sr_info("Found device on port %s.", conn);
	283
	284	if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, dmms[dmm].vendor,
	285	dmms[dmm].device, "")))
	286	goto scan_cleanup;
	287
	288	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
	289	sr_err("Device context malloc failed.");
	290	goto scan_cleanup;
	291	}
	292
	293	devc->serial = serial;
	294
	295	sdi->priv = devc;
	296	sdi->driver = dmms[dmm].di;
	297	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
	298	goto scan_cleanup;
	299	sdi->probes = g_slist_append(sdi->probes, probe);
	300	drvc->instances = g_slist_append(drvc->instances, sdi);
	301	devices = g_slist_append(devices, sdi);
	302
	303	scan_cleanup:
	304	serial_close(serial);
	305
	306	return devices;
	307	}
	308
	309	static GSList hw_scan(GSList options, int dmm)
	310	{
	311	struct sr_hwopt *opt;
	312	GSList l, devices;
	313	const char conn, serialcomm;
	314
	315	conn = serialcomm = NULL;
	316	for (l = options; l; l = l->next) {
	317	opt = l->data;
	318	switch (opt->hwopt) {
	319	case SR_HWOPT_CONN:
	320	conn = opt->value;
	321	break;
	322	case SR_HWOPT_SERIALCOMM:
	323	serialcomm = opt->value;
	324	break;
	325	}
	326	}
	327	if (!conn)
	328	return NULL;
	329
	330	if (serialcomm) {
	331	/* Use the provided comm specs. */
	332	devices = scan(conn, serialcomm, dmm);
	333	} else {
	334	/* Try the default. */
	335	devices = scan(conn, dmms[dmm].conn, dmm);
	336	}
	337
	338	return devices;
	339	}
	340
	341	/* Driver-specific hw_scan() function wrappers */
	342	#define HW_SCAN(X) static GSList hw_scan_##X(GSList options) \
	343	{ return hw_scan(options, X); }
	344	HW_SCAN(DIGITEK_DT4000ZC)
	345	HW_SCAN(TEKPOWER_TP4000ZC)
	346	HW_SCAN(METEX_ME31)
	347	HW_SCAN(PEAKTECH_3410)
	348	HW_SCAN(MASTECH_MAS345)
	349	HW_SCAN(VA_VA18B)
	350	HW_SCAN(METEX_M3640D)
	351	HW_SCAN(PEAKTECH_4370)
	352	HW_SCAN(PCE_PCE_DM32)
	353	HW_SCAN(RADIOSHACK_22_168)
	354	HW_SCAN(RADIOSHACK_22_812)
	355
	356	static GSList *hw_dev_list(int dmm)
	357	{
	358	struct drv_context *drvc;
	359
	360	drvc = dmms[dmm].di->priv;
	361
	362	return drvc->instances;
	363	}
	364
	365	/* Driver-specific hw_dev_list() function wrappers */
	366	#define HW_DEV_LIST(X) static GSList *hw_dev_list_##X(void) \
	367	{ return hw_dev_list(X); }
	368	HW_DEV_LIST(DIGITEK_DT4000ZC)
	369	HW_DEV_LIST(TEKPOWER_TP4000ZC)
	370	HW_DEV_LIST(METEX_ME31)
	371	HW_DEV_LIST(PEAKTECH_3410)
	372	HW_DEV_LIST(MASTECH_MAS345)
	373	HW_DEV_LIST(VA_VA18B)
	374	HW_DEV_LIST(METEX_M3640D)
	375	HW_DEV_LIST(PEAKTECH_4370)
	376	HW_DEV_LIST(PCE_PCE_DM32)
	377	HW_DEV_LIST(RADIOSHACK_22_168)
	378	HW_DEV_LIST(RADIOSHACK_22_812)
	379
	380	static int hw_dev_open(struct sr_dev_inst *sdi)
	381	{
	382	struct dev_context *devc;
	383
	384	if (!(devc = sdi->priv)) {
	385	sr_err("sdi->priv was NULL.");
	386	return SR_ERR_BUG;
	387	}
	388
	389	if (serial_open(devc->serial, SERIAL_RDWR \| SERIAL_NONBLOCK) != SR_OK)
	390	return SR_ERR;
	391
	392	sdi->status = SR_ST_ACTIVE;
	393
	394	return SR_OK;
	395	}
	396
	397	static int hw_dev_close(struct sr_dev_inst *sdi)
	398	{
	399	struct dev_context *devc;
	400
	401	if (!(devc = sdi->priv)) {
	402	sr_err("sdi->priv was NULL.");
	403	return SR_ERR_BUG;
	404	}
	405
	406	if (devc->serial && devc->serial->fd != -1) {
	407	serial_close(devc->serial);
	408	sdi->status = SR_ST_INACTIVE;
	409	}
	410
	411	return SR_OK;
	412	}
	413
	414	static int hw_cleanup(int dmm)
	415	{
	416	clear_instances(dmm);
	417
	418	return SR_OK;
	419	}
	420
	421	/* Driver-specific hw_cleanup() function wrappers */
	422	#define HW_CLEANUP(X) static int hw_cleanup_##X(void) { return hw_cleanup(X); }
	423	HW_CLEANUP(DIGITEK_DT4000ZC)
	424	HW_CLEANUP(TEKPOWER_TP4000ZC)
	425	HW_CLEANUP(METEX_ME31)
	426	HW_CLEANUP(PEAKTECH_3410)
	427	HW_CLEANUP(MASTECH_MAS345)
	428	HW_CLEANUP(VA_VA18B)
	429	HW_CLEANUP(METEX_M3640D)
	430	HW_CLEANUP(PEAKTECH_4370)
	431	HW_CLEANUP(PCE_PCE_DM32)
	432	HW_CLEANUP(RADIOSHACK_22_168)
	433	HW_CLEANUP(RADIOSHACK_22_812)
	434
	435	static int hw_info_get(int info_id, const void **data,
	436	const struct sr_dev_inst *sdi)
	437	{
	438	(void)sdi;
	439
	440	switch (info_id) {
	441	case SR_DI_HWOPTS:
	442	*data = hwopts;
	443	break;
	444	case SR_DI_HWCAPS:
	445	*data = hwcaps;
	446	break;
	447	case SR_DI_NUM_PROBES:
	448	*data = GINT_TO_POINTER(1);
	449	break;
	450	case SR_DI_PROBE_NAMES:
	451	*data = probe_names;
	452	break;
	453	default:
	454	return SR_ERR_ARG;
	455	}
	456
	457	return SR_OK;
	458	}
	459
	460	static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
	461	const void *value)
	462	{
	463	struct dev_context *devc;
	464
	465	if (sdi->status != SR_ST_ACTIVE)
	466	return SR_ERR;
	467
	468	if (!(devc = sdi->priv)) {
	469	sr_err("sdi->priv was NULL.");
	470	return SR_ERR_BUG;
	471	}
	472
	473	switch (hwcap) {
	474	case SR_HWCAP_LIMIT_SAMPLES:
	475	devc->limit_samples = (const uint64_t )value;
	476	sr_dbg("Setting sample limit to %" PRIu64 ".",
	477	devc->limit_samples);
	478	break;
	479	default:
	480	sr_err("Unknown capability: %d.", hwcap);
	481	return SR_ERR;
	482	break;
	483	}
	484
	485	return SR_OK;
	486	}
	487
	488	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
	489	void *cb_data)
	490	{
	491	struct sr_datafeed_packet packet;
	492	struct sr_datafeed_header header;
	493	struct sr_datafeed_meta_analog meta;
	494	struct dev_context *devc;
	495
	496	if (!(devc = sdi->priv)) {
	497	sr_err("sdi->priv was NULL.");
	498	return SR_ERR_BUG;
	499	}
	500
	501	sr_dbg("Starting acquisition.");
	502
	503	devc->cb_data = cb_data;
	504
	505	/*
	506	* Reset the number of samples to take. If we've already collected our
	507	* quota, but we start a new session, and don't reset this, we'll just
	508	* quit without acquiring any new samples.
	509	*/
	510	devc->num_samples = 0;
	511
	512	/* Send header packet to the session bus. */
	513	sr_dbg("Sending SR_DF_HEADER.");
	514	packet.type = SR_DF_HEADER;
	515	packet.payload = (uint8_t *)&header;
	516	header.feed_version = 1;
	517	gettimeofday(&header.starttime, NULL);
	518	sr_session_send(devc->cb_data, &packet);
	519
	520	/* Send metadata about the SR_DF_ANALOG packets to come. */
	521	sr_dbg("Sending SR_DF_META_ANALOG.");
	522	packet.type = SR_DF_META_ANALOG;
	523	packet.payload = &meta;
	524	meta.num_probes = 1;
	525	sr_session_send(devc->cb_data, &packet);
	526
	527	/* Poll every 50ms, or whenever some data comes in. */
	528	sr_source_add(devc->serial->fd, G_IO_IN, 50,
	529	dmms[sdi->driver->subdriver].receive_data, (void *)sdi);
	530
	531	return SR_OK;
	532	}
	533
	534	static int hw_dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	535	{
	536	struct sr_datafeed_packet packet;
	537	struct dev_context *devc;
	538
	539	if (sdi->status != SR_ST_ACTIVE)
	540	return SR_ERR;
	541
	542	if (!(devc = sdi->priv)) {
	543	sr_err("sdi->priv was NULL.");
	544	return SR_ERR_BUG;
	545	}
	546
	547	sr_dbg("Stopping acquisition.");
	548
	549	sr_source_remove(devc->serial->fd);
	550	hw_dev_close((struct sr_dev_inst *)sdi);
	551
	552	/* Send end packet to the session bus. */
	553	sr_dbg("Sending SR_DF_END.");
	554	packet.type = SR_DF_END;
	555	sr_session_send(cb_data, &packet);
	556
	557	return SR_OK;
	558	}
	559
	560	/* Driver structs */
	561	#define DRV(ID, ID_UPPER, NAME, LONGNAME) \
	562	SR_PRIV struct sr_dev_driver ID##_driver_info = { \
	563	.name = NAME, \
	564	.longname = LONGNAME, \
	565	.api_version = 1, \
	566	.init = hw_init_##ID_UPPER, \
	567	.cleanup = hw_cleanup_##ID_UPPER, \
	568	.scan = hw_scan_##ID_UPPER, \
	569	.dev_list = hw_dev_list_##ID_UPPER, \
	570	.dev_clear = clear_instances_##ID_UPPER, \
	571	.dev_open = hw_dev_open, \
	572	.dev_close = hw_dev_close, \
	573	.info_get = hw_info_get, \
	574	.dev_config_set = hw_dev_config_set, \
	575	.dev_acquisition_start = hw_dev_acquisition_start, \
	576	.dev_acquisition_stop = hw_dev_acquisition_stop, \
	577	.priv = NULL, \
	578	.subdriver = ID_UPPER, \
	579	};
	580	DRV(digitek_dt4000zc, DIGITEK_DT4000ZC, "digitek-dt4000zc", "Digitek DT4000ZC")
	581	DRV(tekpower_tp4000zc, TEKPOWER_TP4000ZC, "tekpower-tp4000zc", "TekPower TP4000ZC")
	582	DRV(metex_me31, METEX_ME31, "metex-me31", "Metex ME-31")
	583	DRV(peaktech_3410, PEAKTECH_3410, "peaktech-3410", "PeakTech 3410")
	584	DRV(mastech_mas345, MASTECH_MAS345, "mastech-mas345", "MASTECH MAS345")
	585	DRV(va_va18b, VA_VA18B, "va-va18b", "V&A VA18B")
	586	DRV(metex_m3640d, METEX_M3640D, "metex-m3640d", "Metex M-3640D")
	587	DRV(peaktech_4370, PEAKTECH_4370, "peaktech-4370", "PeakTech 4370")
	588	DRV(pce_pce_dm32, PCE_PCE_DM32, "pce-pce-dm32", "PCE PCE-DM32")
	589	DRV(radioshack_22_168, RADIOSHACK_22_168, "radioshack-22-168", "RadioShack 22-168")
	590	DRV(radioshack_22_812, RADIOSHACK_22_812, "radioshack-22-812", "RadioShack 22-812")