[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;
}

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;
}

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;
}

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

	drvc = dmms[dmm].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(int dmm)
{
	clear_instances(dmm);

	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;

	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-specific API function wrappers */
#define HW_INIT(X) \
static int hw_init_##X(struct sr_context *sr_ctx) { return hw_init(sr_ctx, X); }
#define HW_CLEANUP(X) \
static int hw_cleanup_##X(void) { return hw_cleanup(X); }
#define HW_SCAN(X) \
static GSList *hw_scan_##X(GSList *options) { return hw_scan(options, X); }
#define HW_DEV_LIST(X) \
static GSList *hw_dev_list_##X(void) { return hw_dev_list(X); }
#define CLEAR_INSTANCES(X) \
static int clear_instances_##X(void) { return clear_instances(X); }

/* Driver structs and API function wrappers */
#define DRV(ID, ID_UPPER, NAME, LONGNAME) \
HW_INIT(ID_UPPER) \
HW_CLEANUP(ID_UPPER) \
HW_SCAN(ID_UPPER) \
HW_DEV_LIST(ID_UPPER) \
CLEAR_INSTANCES(ID_UPPER) \
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
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;
6dca2f16	55	SR_PRIV struct sr_dev_driver va_va18b_driver_info;
a53da082	56	SR_PRIV struct sr_dev_driver metex_m3640d_driver_info;
a376ffea	57	SR_PRIV struct sr_dev_driver peaktech_4370_driver_info;
d4bd66a0	58	SR_PRIV struct sr_dev_driver pce_pce_dm32_driver_info;
d5ce233f	59	SR_PRIV struct sr_dev_driver radioshack_22_168_driver_info;
21829e67	60	SR_PRIV struct sr_dev_driver radioshack_22_812_driver_info;
f086b830	61
729b01f9 UH	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	70	dmm_details_dt4000zc,
dccfe015	71	&digitek_dt4000zc_driver_info, receive_data_DIGITEK_DT4000ZC,
f086b830	72	},
729b01f9	73	{
ce3777ad UH	74	"TekPower", "TP4000ZC", "2400/8n1", 2400,
	75	FS9721_PACKET_SIZE, NULL,
	76	sr_fs9721_packet_valid, sr_fs9721_parse,
729b01f9	77	dmm_details_tp4000zc,
dccfe015	78	&tekpower_tp4000zc_driver_info, receive_data_TEKPOWER_TP4000ZC,
729b01f9	79	},
ce3777ad UH	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,
dccfe015	85	&metex_me31_driver_info, receive_data_METEX_ME31,
ce3777ad	86	},
f0ac4929 UH	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,
dccfe015	92	&peaktech_3410_driver_info, receive_data_PEAKTECH_3410,
f0ac4929	93	},
5887c9cc UH	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,
dccfe015	99	&mastech_mas345_driver_info, receive_data_MASTECH_MAS345,
5887c9cc	100	},
6dca2f16 UH	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,
dccfe015	106	&va_va18b_driver_info, receive_data_VA_VA18B,
6dca2f16	107	},
a53da082 UH	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,
dccfe015	113	&metex_m3640d_driver_info, receive_data_METEX_M3640D,
a53da082	114	},
a376ffea UH	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,
dccfe015	120	&peaktech_4370_driver_info, receive_data_PEAKTECH_4370,
a376ffea	121	},
d4bd66a0 UH	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,
dccfe015	127	&pce_pce_dm32_driver_info, receive_data_PCE_PCE_DM32,
d4bd66a0	128	},
d5ce233f AG	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,
dccfe015	134	&radioshack_22_168_driver_info, receive_data_RADIOSHACK_22_168,
d5ce233f	135	},
21829e67 AG	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,
dccfe015	141	&radioshack_22_812_driver_info, receive_data_RADIOSHACK_22_812,
21829e67	142	},
729b01f9	143	};
7dc55d93 AG	144
7dc55d93 AG	145	/* Properly close and free all devices. */
fd9b2b86	146	static int clear_instances(int dmm)
7dc55d93 AG	147	{
	148	struct sr_dev_inst *sdi;
	149	struct drv_context *drvc;
	150	struct dev_context *devc;
	151	GSList *l;
fd9b2b86	152	struct sr_dev_driver *di;
7dc55d93	153
fd9b2b86	154	di = dmms[dmm].di;
26be4ebe	155
7dc55d93 AG	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
34f06b90	174	static int hw_init(struct sr_context *sr_ctx, int dmm)
7dc55d93 AG	175	{
	176	struct drv_context *drvc;
	177
	178	if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
bbabddbd UH	179	sr_err("Driver context malloc failed.");
bbabddbd UH	180	return SR_ERR_MALLOC;
7dc55d93 AG	181	}
7dc55d93 AG	182
06b7a8af UH	183	di = dmms[dmm].di;
06b7a8af UH	184	sr_dbg("Selected '%s' subdriver.", dmms[dmm].di->name);
729b01f9	185
1ebe4b4e	186	drvc->sr_ctx = sr_ctx;
06b7a8af UH	187	//// di->priv = drvc;
06b7a8af UH	188	dmms[dmm].di->priv = drvc;
7dc55d93 AG	189
	190	return SR_OK;
	191	}
	192
729b01f9	193	static GSList scan(const char conn, const char *serialcomm, int dmm)
7dc55d93 AG	194	{
	195	struct sr_dev_inst *sdi;
	196	struct drv_context *drvc;
	197	struct dev_context *devc;
	198	struct sr_probe *probe;
d35afa87	199	struct sr_serial_dev_inst *serial;
7dc55d93	200	GSList *devices;
2546b05c AG	201	int dropped, ret;
	202	size_t len;
	203	uint8_t buf[128];
7dc55d93	204
d35afa87	205	if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
7dc55d93	206	return NULL;
d35afa87	207
ce3777ad	208	if (serial_open(serial, SERIAL_RDWR \| SERIAL_NONBLOCK) != SR_OK)
7dc55d93	209	return NULL;
7dc55d93	210
ce3777ad	211	sr_info("Probing port %s.", conn);
7dc55d93	212
06b7a8af UH	213	//// drvc = di->priv;
06b7a8af UH	214	drvc = dmms[dmm].di->priv;
7dc55d93	215	devices = NULL;
d35afa87	216	serial_flush(serial);
bbabddbd UH	217
	218	/*
	219	* There's no way to get an ID from the multimeter. It just sends data
	220	* periodically, so the best we can do is check if the packets match
	221	* the expected format.
	222	*/
7dc55d93	223
2546b05c AG	224	/* Let's get a bit of data and see if we can find a packet. */
2546b05c AG	225	len = sizeof(buf);
7dc55d93	226
ce3777ad UH	227	/* Request a packet if the DMM requires this. */
	228	if (dmms[dmm].packet_request) {
	229	if ((ret = dmms[dmm].packet_request(serial)) < 0) {
	230	sr_err("Failed to request packet: %d.", ret);
	231	return FALSE;
	232	}
	233	}
	234
729b01f9 UH	235	ret = serial_stream_detect(serial, buf, &len, dmms[dmm].packet_size,
	236	dmms[dmm].packet_valid, 1000,
	237	dmms[dmm].baudrate);
2546b05c AG	238	if (ret != SR_OK)
2546b05c AG	239	goto scan_cleanup;
7dc55d93	240
2546b05c AG	241	/*
	242	* If we dropped more than two packets worth of data, something is
	243	* wrong. We shouldn't quit however, since the dropped bytes might be
	244	* just zeroes at the beginning of the stream. Those can occur as a
	245	* combination of the nonstandard cable that ships with this device and
	246	* the serial port or USB to serial adapter.
	247	*/
729b01f9 UH	248	dropped = len - dmms[dmm].packet_size;
729b01f9 UH	249	if (dropped > 2 * dmms[dmm].packet_size)
6bef68a7	250	sr_warn("Had to drop too much data.");
7dc55d93	251
2546b05c	252	sr_info("Found device on port %s.", conn);
7dc55d93	253
729b01f9 UH	254	if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, dmms[dmm].vendor,
729b01f9 UH	255	dmms[dmm].device, "")))
2546b05c	256	goto scan_cleanup;
6bef68a7	257
2546b05c AG	258	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
	259	sr_err("Device context malloc failed.");
	260	goto scan_cleanup;
7dc55d93 AG	261	}
7dc55d93 AG	262
2546b05c AG	263	devc->serial = serial;
	264
	265	sdi->priv = devc;
06b7a8af	266	sdi->driver = dmms[dmm].di;
2546b05c AG	267	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
	268	goto scan_cleanup;
	269	sdi->probes = g_slist_append(sdi->probes, probe);
	270	drvc->instances = g_slist_append(drvc->instances, sdi);
	271	devices = g_slist_append(devices, sdi);
	272
	273	scan_cleanup:
d35afa87	274	serial_close(serial);
2546b05c	275
7dc55d93 AG	276	return devices;
	277	}
	278
ea4c6c23	279	static GSList hw_scan(GSList options, int dmm)
7dc55d93 AG	280	{
	281	struct sr_hwopt *opt;
	282	GSList l, devices;
	283	const char conn, serialcomm;
	284
	285	conn = serialcomm = NULL;
	286	for (l = options; l; l = l->next) {
	287	opt = l->data;
	288	switch (opt->hwopt) {
	289	case SR_HWOPT_CONN:
	290	conn = opt->value;
	291	break;
	292	case SR_HWOPT_SERIALCOMM:
	293	serialcomm = opt->value;
	294	break;
	295	}
	296	}
	297	if (!conn)
	298	return NULL;
	299
	300	if (serialcomm) {
	301	/* Use the provided comm specs. */
729b01f9	302	devices = scan(conn, serialcomm, dmm);
7dc55d93	303	} else {
d35afa87	304	/* Try the default. */
729b01f9	305	devices = scan(conn, dmms[dmm].conn, dmm);
7dc55d93 AG	306	}
	307
	308	return devices;
	309	}
	310
ca4b1309	311	static GSList *hw_dev_list(int dmm)
7dc55d93 AG	312	{
	313	struct drv_context *drvc;
	314
ca4b1309	315	drvc = dmms[dmm].di->priv;
7dc55d93 AG	316
	317	return drvc->instances;
	318	}
	319
	320	static int hw_dev_open(struct sr_dev_inst *sdi)
	321	{
	322	struct dev_context *devc;
	323
	324	if (!(devc = sdi->priv)) {
	325	sr_err("sdi->priv was NULL.");
	326	return SR_ERR_BUG;
	327	}
	328
ce3777ad	329	if (serial_open(devc->serial, SERIAL_RDWR \| SERIAL_NONBLOCK) != SR_OK)
7dc55d93	330	return SR_ERR;
bbabddbd	331
7dc55d93 AG	332	sdi->status = SR_ST_ACTIVE;
	333
	334	return SR_OK;
	335	}
	336
	337	static int hw_dev_close(struct sr_dev_inst *sdi)
	338	{
	339	struct dev_context *devc;
	340
	341	if (!(devc = sdi->priv)) {
	342	sr_err("sdi->priv was NULL.");
	343	return SR_ERR_BUG;
	344	}
	345
	346	if (devc->serial && devc->serial->fd != -1) {
d35afa87	347	serial_close(devc->serial);
7dc55d93 AG	348	sdi->status = SR_ST_INACTIVE;
	349	}
	350
	351	return SR_OK;
	352	}
	353
0c23677d	354	static int hw_cleanup(int dmm)
7dc55d93	355	{
fd9b2b86	356	clear_instances(dmm);
7dc55d93 AG	357
	358	return SR_OK;
	359	}
	360
	361	static int hw_info_get(int info_id, const void **data,
bbabddbd	362	const struct sr_dev_inst *sdi)
7dc55d93	363	{
bbabddbd	364	(void)sdi;
7dc55d93 AG	365
	366	switch (info_id) {
	367	case SR_DI_HWOPTS:
	368	*data = hwopts;
	369	break;
	370	case SR_DI_HWCAPS:
	371	*data = hwcaps;
	372	break;
	373	case SR_DI_NUM_PROBES:
	374	*data = GINT_TO_POINTER(1);
	375	break;
	376	case SR_DI_PROBE_NAMES:
	377	*data = probe_names;
	378	break;
	379	default:
	380	return SR_ERR_ARG;
	381	}
	382
	383	return SR_OK;
	384	}
	385
	386	static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
bbabddbd	387	const void *value)
7dc55d93 AG	388	{
	389	struct dev_context *devc;
	390
	391	if (sdi->status != SR_ST_ACTIVE)
	392	return SR_ERR;
	393
	394	if (!(devc = sdi->priv)) {
	395	sr_err("sdi->priv was NULL.");
	396	return SR_ERR_BUG;
	397	}
	398
	399	switch (hwcap) {
	400	case SR_HWCAP_LIMIT_SAMPLES:
	401	devc->limit_samples = (const uint64_t )value;
	402	sr_dbg("Setting sample limit to %" PRIu64 ".",
	403	devc->limit_samples);
	404	break;
	405	default:
	406	sr_err("Unknown capability: %d.", hwcap);
	407	return SR_ERR;
	408	break;
	409	}
	410
	411	return SR_OK;
	412	}
	413
	414	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
bbabddbd	415	void *cb_data)
7dc55d93 AG	416	{
	417	struct sr_datafeed_packet packet;
	418	struct sr_datafeed_header header;
	419	struct sr_datafeed_meta_analog meta;
	420	struct dev_context *devc;
	421
	422	if (!(devc = sdi->priv)) {
	423	sr_err("sdi->priv was NULL.");
	424	return SR_ERR_BUG;
	425	}
	426
	427	sr_dbg("Starting acquisition.");
	428
	429	devc->cb_data = cb_data;
	430
bbabddbd UH	431	/*
bbabddbd UH	432	* Reset the number of samples to take. If we've already collected our
7dc55d93	433	* quota, but we start a new session, and don't reset this, we'll just
bbabddbd UH	434	* quit without acquiring any new samples.
bbabddbd UH	435	*/
7dc55d93 AG	436	devc->num_samples = 0;
	437
	438	/* Send header packet to the session bus. */
	439	sr_dbg("Sending SR_DF_HEADER.");
	440	packet.type = SR_DF_HEADER;
	441	packet.payload = (uint8_t *)&header;
	442	header.feed_version = 1;
	443	gettimeofday(&header.starttime, NULL);
	444	sr_session_send(devc->cb_data, &packet);
	445
	446	/* Send metadata about the SR_DF_ANALOG packets to come. */
	447	sr_dbg("Sending SR_DF_META_ANALOG.");
	448	packet.type = SR_DF_META_ANALOG;
	449	packet.payload = &meta;
	450	meta.num_probes = 1;
	451	sr_session_send(devc->cb_data, &packet);
	452
bbabddbd	453	/* Poll every 50ms, or whenever some data comes in. */
7dc55d93	454	sr_source_add(devc->serial->fd, G_IO_IN, 50,
06b7a8af	455	dmms[sdi->driver->subdriver].receive_data, (void *)sdi);
7dc55d93 AG	456
	457	return SR_OK;
	458	}
	459
69b07d14	460	static int hw_dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
7dc55d93 AG	461	{
	462	struct sr_datafeed_packet packet;
	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	sr_dbg("Stopping acquisition.");
	474
	475	sr_source_remove(devc->serial->fd);
	476	hw_dev_close((struct sr_dev_inst *)sdi);
	477
	478	/* Send end packet to the session bus. */
	479	sr_dbg("Sending SR_DF_END.");
	480	packet.type = SR_DF_END;
	481	sr_session_send(cb_data, &packet);
	482
	483	return SR_OK;
	484	}
	485
3098b390 AG	486	/* Driver-specific API function wrappers */
	487	#define HW_INIT(X) \
	488	static int hw_init_##X(struct sr_context *sr_ctx) { return hw_init(sr_ctx, X); }
	489	#define HW_CLEANUP(X) \
	490	static int hw_cleanup_##X(void) { return hw_cleanup(X); }
	491	#define HW_SCAN(X) \
	492	static GSList hw_scan_##X(GSList options) { return hw_scan(options, X); }
	493	#define HW_DEV_LIST(X) \
	494	static GSList *hw_dev_list_##X(void) { return hw_dev_list(X); }
	495	#define CLEAR_INSTANCES(X) \
	496	static int clear_instances_##X(void) { return clear_instances(X); }
	497
	498	/* Driver structs and API function wrappers */
f1437c68	499	#define DRV(ID, ID_UPPER, NAME, LONGNAME) \
3098b390 AG	500	HW_INIT(ID_UPPER) \
	501	HW_CLEANUP(ID_UPPER) \
	502	HW_SCAN(ID_UPPER) \
	503	HW_DEV_LIST(ID_UPPER) \
	504	CLEAR_INSTANCES(ID_UPPER) \
f1437c68 UH	505	SR_PRIV struct sr_dev_driver ID##_driver_info = { \
	506	.name = NAME, \
	507	.longname = LONGNAME, \
	508	.api_version = 1, \
	509	.init = hw_init_##ID_UPPER, \
0c23677d	510	.cleanup = hw_cleanup_##ID_UPPER, \
ea4c6c23	511	.scan = hw_scan_##ID_UPPER, \
ca4b1309	512	.dev_list = hw_dev_list_##ID_UPPER, \
fd9b2b86	513	.dev_clear = clear_instances_##ID_UPPER, \
f1437c68 UH	514	.dev_open = hw_dev_open, \
	515	.dev_close = hw_dev_close, \
	516	.info_get = hw_info_get, \
	517	.dev_config_set = hw_dev_config_set, \
	518	.dev_acquisition_start = hw_dev_acquisition_start, \
	519	.dev_acquisition_stop = hw_dev_acquisition_stop, \
	520	.priv = NULL, \
	521	.subdriver = ID_UPPER, \
21829e67	522	};
3098b390	523
f1437c68 UH	524	DRV(digitek_dt4000zc, DIGITEK_DT4000ZC, "digitek-dt4000zc", "Digitek DT4000ZC")
	525	DRV(tekpower_tp4000zc, TEKPOWER_TP4000ZC, "tekpower-tp4000zc", "TekPower TP4000ZC")
	526	DRV(metex_me31, METEX_ME31, "metex-me31", "Metex ME-31")
	527	DRV(peaktech_3410, PEAKTECH_3410, "peaktech-3410", "PeakTech 3410")
	528	DRV(mastech_mas345, MASTECH_MAS345, "mastech-mas345", "MASTECH MAS345")
	529	DRV(va_va18b, VA_VA18B, "va-va18b", "V&A VA18B")
	530	DRV(metex_m3640d, METEX_M3640D, "metex-m3640d", "Metex M-3640D")
	531	DRV(peaktech_4370, PEAKTECH_4370, "peaktech-4370", "PeakTech 4370")
	532	DRV(pce_pce_dm32, PCE_PCE_DM32, "pce-pce-dm32", "PCE PCE-DM32")
	533	DRV(radioshack_22_168, RADIOSHACK_22_168, "radioshack-22-168", "RadioShack 22-168")
	534	DRV(radioshack_22_812, RADIOSHACK_22_812, "radioshack-22-812", "RadioShack 22-812")