[libsigrok.git] / src / hardware / testo / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2014 Bert Vermeulen <bert@biot.com>
 *
 * 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 <string.h>
#include "protocol.h"

#define SERIALCOMM "115200/8n1"

SR_PRIV struct sr_dev_driver testo_driver_info;
static struct sr_dev_driver *di = &testo_driver_info;
static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);

static const uint32_t scanopts[] = {
	SR_CONF_CONN,
};

static const uint32_t devopts[] = {
	SR_CONF_MULTIMETER,
	SR_CONF_CONTINUOUS,
	SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
	SR_CONF_LIMIT_MSEC | SR_CONF_SET,
};

unsigned char TESTO_x35_REQUEST[] = { 0x12, 0, 0, 0, 1, 1, 0x55, 0xd1, 0xb7 };
struct testo_model models[] = {
	{ "435", 9, TESTO_x35_REQUEST },
};

static int init(struct sr_context *sr_ctx)
{
	return std_init(sr_ctx, di, LOG_PREFIX);
}

static GSList *scan(GSList *options)
{
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_config *src;
	struct sr_dev_inst *sdi;
	struct sr_usb_dev_inst *usb;
	struct libusb_device_descriptor des;
	libusb_device **devlist;
	struct libusb_device_handle *hdl;
	GSList *conn_devices, *devices, *l;
	int ret, i;
	const char *str;
	char manufacturer[64], product[64], connection_id[64];

	devices = NULL;
	drvc = di->priv;
	drvc->instances = NULL;

	conn_devices = NULL;
	for (l = options; l; l = l->next) {
		src = l->data;
		if (src->key != SR_CONF_CONN)
			continue;
		str = g_variant_get_string(src->data, NULL);
		conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, str);
	}

	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
	for (i = 0; devlist[i]; i++) {
		if (conn_devices) {
			usb = NULL;
			for (l = conn_devices; l; l = l->next) {
				usb = l->data;
				if (usb->bus == libusb_get_bus_number(devlist[i])
					&& usb->address == libusb_get_device_address(devlist[i]))
					break;
			}
			if (!l)
				/* This device matched none of the ones that
				 * matched the conn specification. */
				continue;
		}

		if ((ret = libusb_get_device_descriptor( devlist[i], &des)) != 0) {
			sr_warn("Failed to get device descriptor: %s.",
				libusb_error_name(ret));
			continue;
		}

		if ((ret = libusb_open(devlist[i], &hdl)) < 0)
			continue;

		manufacturer[0] = product[0] = '\0';
		if (des.iManufacturer && (ret = libusb_get_string_descriptor_ascii(
				hdl, des.iManufacturer, (unsigned char *) manufacturer,
				sizeof(manufacturer))) < 0) {
			sr_warn("Failed to get manufacturer string descriptor: %s.",
				libusb_error_name(ret));
		}
		if (des.iProduct && (ret = libusb_get_string_descriptor_ascii(
				hdl, des.iProduct, (unsigned char *) product,
				sizeof(product))) < 0) {
			sr_warn("Failed to get product string descriptor: %s.",
				libusb_error_name(ret));
		}
		libusb_close(hdl);

		if (strncmp(manufacturer, "testo", 5))
			continue;

		usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));

		/* Hardcode the 435 for now.*/
		if (strcmp(product, "testo 435/635/735"))
			continue;

		sdi = sr_dev_inst_new(SR_ST_INACTIVE, "Testo",
				"435/635/735", NULL);
		sdi->driver = di;
		sdi->inst_type = SR_INST_USB;
		sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
				libusb_get_device_address(devlist[i]), NULL);
		sdi->connection_id = g_strdup(connection_id);
		devc = g_malloc(sizeof(struct dev_context));
		devc->model = &models[0];
		devc->limit_msec = 0;
		devc->limit_samples = 0;
		sdi->priv = devc;
		if (testo_probe_channels(sdi) != SR_OK)
			continue;
		drvc->instances = g_slist_append(drvc->instances, sdi);
		devices = g_slist_append(devices, sdi);
	}
	libusb_free_device_list(devlist, 1);
	g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);

	return devices;
}

static GSList *dev_list(void)
{
	return ((struct drv_context *)(di->priv))->instances;
}

static int dev_clear(void)
{
	return std_dev_clear(di, NULL);
}

static int dev_open(struct sr_dev_inst *sdi)
{
	struct drv_context *drvc = di->priv;
	struct sr_usb_dev_inst *usb;
	libusb_device **devlist;
	int ret, i;
	char connection_id[64];

	if (!di->priv) {
		sr_err("Driver was not initialized.");
		return SR_ERR;
	}

	usb = sdi->conn;
	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
	for (i = 0; devlist[i]; i++) {
		usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
		if (strcmp(sdi->connection_id, connection_id))
			continue;
		if ((ret = libusb_open(devlist[i], &usb->devhdl))) {
			sr_err("Failed to open device: %s.", libusb_error_name(ret));
			return SR_ERR;
		}
		break;
	}
	libusb_free_device_list(devlist, 1);
	if (!devlist[i]) {
		sr_err("Device not found.");
		return SR_ERR;
	}

	if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) {
		if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
			if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
				sr_err("Failed to detach kernel driver: %s.",
					   libusb_error_name(ret));
				return SR_ERR;
			}
		}
	}

	if ((ret = libusb_claim_interface(usb->devhdl, 0))) {
		sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
		return SR_ERR;
	}
	sdi->status = SR_ST_ACTIVE;

	return SR_OK;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	struct sr_usb_dev_inst *usb;

	if (!di->priv) {
		sr_err("Driver was not initialized.");
		return SR_ERR;
	}

	usb = sdi->conn;
	if (!usb->devhdl)
		/*  Nothing to do. */
		return SR_OK;

	libusb_release_interface(usb->devhdl, 0);
	libusb_close(usb->devhdl);
	usb->devhdl = NULL;
	sdi->status = SR_ST_INACTIVE;

	return SR_OK;
}

static int cleanup(void)
{
	int ret;
	struct drv_context *drvc;

	if (!(drvc = di->priv))
		return SR_OK;

	ret = dev_clear();
	g_free(drvc);
	di->priv = NULL;

	return ret;
}

static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct sr_usb_dev_inst *usb;
	char str[128];

	(void)cg;

	switch (key) {
	case SR_CONF_CONN:
		if (!sdi || !sdi->conn)
			return SR_ERR_ARG;
		usb = sdi->conn;
		snprintf(str, 128, "%d.%d", usb->bus, usb->address);
		*data = g_variant_new_string(str);
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct dev_context *devc;
	gint64 now;
	int ret;

	(void)cg;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	if (!di->priv) {
		sr_err("Driver was not initialized.");
		return SR_ERR;
	}

	devc = sdi->priv;
	ret = SR_OK;
	switch (key) {
	case SR_CONF_LIMIT_MSEC:
		devc->limit_msec = g_variant_get_uint64(data);
		now = g_get_monotonic_time() / 1000;
		devc->end_time = now + devc->limit_msec;
		sr_dbg("Setting time limit to %" PRIu64 "ms.",
		       devc->limit_msec);
		break;
	case SR_CONF_LIMIT_SAMPLES:
		devc->limit_samples = g_variant_get_uint64(data);
		sr_dbg("Setting sample limit to %" PRIu64 ".",
		       devc->limit_samples);
		break;
	default:
		ret = SR_ERR_NA;
	}

	return ret;
}

static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	(void)sdi;
	(void)cg;

	switch (key) {
	case SR_CONF_SCAN_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
		break;
	case SR_CONF_DEVICE_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static void receive_data(struct sr_dev_inst *sdi, unsigned char *data, int len)
{
	struct dev_context *devc;
	int packet_size;
	uint16_t crc;

	devc = sdi->priv;

	if (devc->reply_size + len > MAX_REPLY_SIZE) {
		/* Something went very wrong. */
		sr_dbg("Receive buffer overrun.");
		devc->reply_size = 0;
		return;
	}

	memcpy(devc->reply + devc->reply_size, data, len);
	devc->reply_size += len;
	/* Sixth byte contains the length of the packet. */
	if (devc->reply_size < 7)
		return;

	packet_size = 7 + devc->reply[6] * 7 + 2;
	if (devc->reply_size < packet_size)
		return;

	if (!testo_check_packet_prefix(devc->reply, devc->reply_size))
		return;

	crc = crc16_mcrf4xx(0xffff, devc->reply, devc->reply_size - 2);
	if (crc == RL16(&devc->reply[devc->reply_size - 2])) {
		testo_receive_packet(sdi);
		devc->num_samples++;
	} else {
		sr_dbg("Packet has invalid CRC.");
	}

	devc->reply_size = 0;
	if (devc->limit_samples && devc->num_samples >= devc->limit_samples)
		dev_acquisition_stop(sdi, devc->cb_data);
	else
		testo_request_packet(sdi);

}

SR_PRIV void receive_transfer(struct libusb_transfer *transfer)
{
	struct dev_context *devc;
	struct sr_dev_inst *sdi;
	int ret;

	sdi = transfer->user_data;
	devc = sdi->priv;
	if (transfer == devc->out_transfer)
		/* Just the command acknowledgement. */
		return;

	if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
		/* USB device was unplugged. */
		dev_acquisition_stop(sdi, devc->cb_data);
	} else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
		/* First two bytes in any transfer are FTDI status bytes. */
		if (transfer->actual_length > 2)
			receive_data(sdi, transfer->buffer + 2, transfer->actual_length - 2);
	}
	/* Anything else is either an error or a timeout, which is fine:
	 * we were just going to send another transfer request anyway. */

	if (sdi->status == SR_ST_ACTIVE) {
		if ((ret = libusb_submit_transfer(transfer) != 0)) {
			sr_err("Unable to resubmit transfer: %s.",
			       libusb_error_name(ret));
			g_free(transfer->buffer);
			libusb_free_transfer(transfer);
			dev_acquisition_stop(sdi, devc->cb_data);
		}
	} else {
		/* This was the last transfer we're going to receive, so
		 * clean up now. */
		g_free(transfer->buffer);
		libusb_free_transfer(transfer);
	}
}

static int handle_events(int fd, int revents, void *cb_data)
{
	struct dev_context *devc;
	struct drv_context *drvc = di->priv;
	struct sr_datafeed_packet packet;
	struct sr_dev_inst *sdi;
	struct timeval tv;
	gint64 now;

	(void)fd;
	(void)revents;

	sdi = cb_data;
	devc = sdi->priv;

	if (devc->limit_msec) {
		now = g_get_monotonic_time() / 1000;
		if (now > devc->end_time)
			dev_acquisition_stop(sdi, devc->cb_data);
	}

	if (sdi->status == SR_ST_STOPPING) {
		usb_source_remove(sdi->session, drvc->sr_ctx);

		dev_close(sdi);

		packet.type = SR_DF_END;
		sr_session_send(sdi, &packet);
	}

	memset(&tv, 0, sizeof(struct timeval));
	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
			NULL);

	return TRUE;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
{
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_usb_dev_inst *usb;
	struct libusb_transfer *transfer;
	int ret;
	unsigned char *buf;

	drvc = di->priv;
	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	if (!di->priv) {
		sr_err("Driver was not initialized.");
		return SR_ERR;
	}

	devc = sdi->priv;
	usb = sdi->conn;
	devc->cb_data = cb_data;
	devc->end_time = 0;
	devc->num_samples = 0;
	devc->reply_size = 0;

	/* Send header packet to the session bus. */
	std_session_send_df_header(cb_data, LOG_PREFIX);

	usb_source_add(sdi->session, drvc->sr_ctx, 100,
			handle_events, (void *)sdi);

	if (testo_set_serial_params(usb) != SR_OK)
		return SR_ERR;

	devc->out_transfer = libusb_alloc_transfer(0);
	if (testo_request_packet(sdi) != SR_OK)
		return SR_ERR;

	buf = g_try_malloc(MAX_REPLY_SIZE);
	transfer = libusb_alloc_transfer(0);
	libusb_fill_bulk_transfer(transfer, usb->devhdl, EP_IN, buf,
			MAX_REPLY_SIZE, receive_transfer, (void *)sdi, 100);
	if ((ret = libusb_submit_transfer(transfer) != 0)) {
		sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
		libusb_free_transfer(transfer);
		g_free(buf);
		return SR_ERR;
	}
	devc->reply_size = 0;

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
	(void)cb_data;

	if (!di->priv) {
		sr_err("Driver was not initialized.");
		return SR_ERR;
	}

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	sdi->status = SR_ST_STOPPING;

	return SR_OK;
}

SR_PRIV struct sr_dev_driver testo_driver_info = {
	.name = "testo",
	.longname = "Testo",
	.api_version = 1,
	.init = init,
	.cleanup = cleanup,
	.scan = scan,
	.dev_list = dev_list,
	.dev_clear = dev_clear,
	.config_get = config_get,
	.config_set = config_set,
	.config_list = config_list,
	.dev_open = dev_open,
	.dev_close = dev_close,
	.dev_acquisition_start = dev_acquisition_start,
	.dev_acquisition_stop = dev_acquisition_stop,
	.priv = NULL,
};
Commit	Line	Data
0acdd793 BV	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2014 Bert Vermeulen <bert@biot.com>
	5	*
	6	* This program is free software: you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation, either version 3 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
6dcb9723	20	#include <string.h>
0acdd793 BV	21	#include "protocol.h"
0acdd793 BV	22
6dcb9723 BV	23	#define SERIALCOMM "115200/8n1"
6dcb9723 BV	24
0acdd793 BV	25	SR_PRIV struct sr_dev_driver testo_driver_info;
0acdd793 BV	26	static struct sr_dev_driver *di = &testo_driver_info;
6dcb9723 BV	27	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data);
6dcb9723 BV	28
584560f1	29	static const uint32_t scanopts[] = {
6dcb9723 BV	30	SR_CONF_CONN,
	31	};
	32
584560f1	33	static const uint32_t devopts[] = {
6dcb9723	34	SR_CONF_MULTIMETER,
6dcb9723	35	SR_CONF_CONTINUOUS,
5827f61b BV	36	SR_CONF_LIMIT_SAMPLES \| SR_CONF_SET,
5827f61b BV	37	SR_CONF_LIMIT_MSEC \| SR_CONF_SET,
6dcb9723 BV	38	};
	39
	40	unsigned char TESTO_x35_REQUEST[] = { 0x12, 0, 0, 0, 1, 1, 0x55, 0xd1, 0xb7 };
	41	struct testo_model models[] = {
	42	{ "435", 9, TESTO_x35_REQUEST },
	43	};
0acdd793 BV	44
	45	static int init(struct sr_context *sr_ctx)
	46	{
	47	return std_init(sr_ctx, di, LOG_PREFIX);
	48	}
	49
	50	static GSList scan(GSList options)
	51	{
	52	struct drv_context *drvc;
6dcb9723 BV	53	struct dev_context *devc;
	54	struct sr_config *src;
	55	struct sr_dev_inst *sdi;
	56	struct sr_usb_dev_inst *usb;
	57	struct libusb_device_descriptor des;
	58	libusb_device **devlist;
	59	struct libusb_device_handle *hdl;
	60	GSList conn_devices, devices, *l;
bde9fbd1	61	int ret, i;
6dcb9723	62	const char *str;
bde9fbd1	63	char manufacturer[64], product[64], connection_id[64];
0acdd793 BV	64
	65	devices = NULL;
	66	drvc = di->priv;
	67	drvc->instances = NULL;
	68
6dcb9723 BV	69	conn_devices = NULL;
	70	for (l = options; l; l = l->next) {
	71	src = l->data;
	72	if (src->key != SR_CONF_CONN)
	73	continue;
	74	str = g_variant_get_string(src->data, NULL);
	75	conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, str);
	76	}
	77
	78	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
	79	for (i = 0; devlist[i]; i++) {
	80	if (conn_devices) {
	81	usb = NULL;
	82	for (l = conn_devices; l; l = l->next) {
	83	usb = l->data;
	84	if (usb->bus == libusb_get_bus_number(devlist[i])
	85	&& usb->address == libusb_get_device_address(devlist[i]))
	86	break;
	87	}
	88	if (!l)
	89	/* This device matched none of the ones that
	90	* matched the conn specification. */
	91	continue;
	92	}
	93
	94	if ((ret = libusb_get_device_descriptor( devlist[i], &des)) != 0) {
	95	sr_warn("Failed to get device descriptor: %s.",
	96	libusb_error_name(ret));
	97	continue;
	98	}
	99
	100	if ((ret = libusb_open(devlist[i], &hdl)) < 0)
	101	continue;
	102
	103	manufacturer[0] = product[0] = '\0';
	104	if (des.iManufacturer && (ret = libusb_get_string_descriptor_ascii(
	105	hdl, des.iManufacturer, (unsigned char *) manufacturer,
	106	sizeof(manufacturer))) < 0) {
	107	sr_warn("Failed to get manufacturer string descriptor: %s.",
	108	libusb_error_name(ret));
	109	}
	110	if (des.iProduct && (ret = libusb_get_string_descriptor_ascii(
	111	hdl, des.iProduct, (unsigned char *) product,
	112	sizeof(product))) < 0) {
	113	sr_warn("Failed to get product string descriptor: %s.",
	114	libusb_error_name(ret));
	115	}
	116	libusb_close(hdl);
	117
	118	if (strncmp(manufacturer, "testo", 5))
	119	continue;
	120
bde9fbd1 SA	121	usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
bde9fbd1 SA	122
6dcb9723 BV	123	/* Hardcode the 435 for now.*/
	124	if (strcmp(product, "testo 435/635/735"))
	125	continue;
	126
bde9fbd1	127	sdi = sr_dev_inst_new(SR_ST_INACTIVE, "Testo",
6dcb9723 BV	128	"435/635/735", NULL);
	129	sdi->driver = di;
	130	sdi->inst_type = SR_INST_USB;
	131	sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
	132	libusb_get_device_address(devlist[i]), NULL);
bde9fbd1	133	sdi->connection_id = g_strdup(connection_id);
6dcb9723 BV	134	devc = g_malloc(sizeof(struct dev_context));
	135	devc->model = &models[0];
	136	devc->limit_msec = 0;
	137	devc->limit_samples = 0;
	138	sdi->priv = devc;
	139	if (testo_probe_channels(sdi) != SR_OK)
	140	continue;
	141	drvc->instances = g_slist_append(drvc->instances, sdi);
	142	devices = g_slist_append(devices, sdi);
	143	}
	144	libusb_free_device_list(devlist, 1);
	145	g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
0acdd793 BV	146
	147	return devices;
	148	}
	149
	150	static GSList *dev_list(void)
	151	{
	152	return ((struct drv_context *)(di->priv))->instances;
	153	}
	154
	155	static int dev_clear(void)
	156	{
	157	return std_dev_clear(di, NULL);
	158	}
	159
	160	static int dev_open(struct sr_dev_inst *sdi)
	161	{
6dcb9723 BV	162	struct drv_context *drvc = di->priv;
	163	struct sr_usb_dev_inst *usb;
	164	libusb_device **devlist;
	165	int ret, i;
bde9fbd1	166	char connection_id[64];
6dcb9723 BV	167
	168	if (!di->priv) {
	169	sr_err("Driver was not initialized.");
	170	return SR_ERR;
	171	}
0acdd793	172
6dcb9723 BV	173	usb = sdi->conn;
	174	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
	175	for (i = 0; devlist[i]; i++) {
bde9fbd1 SA	176	usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
bde9fbd1 SA	177	if (strcmp(sdi->connection_id, connection_id))
6dcb9723 BV	178	continue;
	179	if ((ret = libusb_open(devlist[i], &usb->devhdl))) {
	180	sr_err("Failed to open device: %s.", libusb_error_name(ret));
	181	return SR_ERR;
	182	}
	183	break;
	184	}
	185	libusb_free_device_list(devlist, 1);
	186	if (!devlist[i]) {
	187	sr_err("Device not found.");
	188	return SR_ERR;
	189	}
0acdd793	190
88b1d4e5 BV	191	if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) {
	192	if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
	193	if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
	194	sr_err("Failed to detach kernel driver: %s.",
	195	libusb_error_name(ret));
	196	return SR_ERR;
	197	}
	198	}
	199	}
	200
6dcb9723 BV	201	if ((ret = libusb_claim_interface(usb->devhdl, 0))) {
	202	sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
	203	return SR_ERR;
	204	}
0acdd793 BV	205	sdi->status = SR_ST_ACTIVE;
	206
	207	return SR_OK;
	208	}
	209
	210	static int dev_close(struct sr_dev_inst *sdi)
	211	{
6dcb9723 BV	212	struct sr_usb_dev_inst *usb;
	213
	214	if (!di->priv) {
	215	sr_err("Driver was not initialized.");
	216	return SR_ERR;
	217	}
0acdd793	218
6dcb9723 BV	219	usb = sdi->conn;
	220	if (!usb->devhdl)
	221	/* Nothing to do. */
	222	return SR_OK;
0acdd793	223
6dcb9723 BV	224	libusb_release_interface(usb->devhdl, 0);
	225	libusb_close(usb->devhdl);
	226	usb->devhdl = NULL;
0acdd793 BV	227	sdi->status = SR_ST_INACTIVE;
	228
	229	return SR_OK;
	230	}
	231
	232	static int cleanup(void)
	233	{
6dcb9723 BV	234	int ret;
6dcb9723 BV	235	struct drv_context *drvc;
0acdd793	236
6dcb9723 BV	237	if (!(drvc = di->priv))
6dcb9723 BV	238	return SR_OK;
0acdd793	239
6dcb9723 BV	240	ret = dev_clear();
	241	g_free(drvc);
	242	di->priv = NULL;
	243
	244	return ret;
0acdd793 BV	245	}
0acdd793 BV	246
584560f1	247	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
0acdd793 BV	248	const struct sr_channel_group *cg)
0acdd793 BV	249	{
6dcb9723 BV	250	struct sr_usb_dev_inst *usb;
6dcb9723 BV	251	char str[128];
0acdd793	252
0acdd793 BV	253	(void)cg;
0acdd793 BV	254
0acdd793	255	switch (key) {
6dcb9723 BV	256	case SR_CONF_CONN:
	257	if (!sdi \|\| !sdi->conn)
	258	return SR_ERR_ARG;
	259	usb = sdi->conn;
	260	snprintf(str, 128, "%d.%d", usb->bus, usb->address);
	261	*data = g_variant_new_string(str);
	262	break;
0acdd793 BV	263	default:
	264	return SR_ERR_NA;
	265	}
	266
6dcb9723	267	return SR_OK;
0acdd793 BV	268	}
0acdd793 BV	269
584560f1	270	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
0acdd793 BV	271	const struct sr_channel_group *cg)
0acdd793 BV	272	{
6dcb9723 BV	273	struct dev_context *devc;
6dcb9723 BV	274	gint64 now;
0acdd793 BV	275	int ret;
0acdd793 BV	276
0acdd793 BV	277	(void)cg;
	278
	279	if (sdi->status != SR_ST_ACTIVE)
	280	return SR_ERR_DEV_CLOSED;
	281
6dcb9723 BV	282	if (!di->priv) {
	283	sr_err("Driver was not initialized.");
	284	return SR_ERR;
	285	}
	286
	287	devc = sdi->priv;
0acdd793 BV	288	ret = SR_OK;
0acdd793 BV	289	switch (key) {
6dcb9723 BV	290	case SR_CONF_LIMIT_MSEC:
	291	devc->limit_msec = g_variant_get_uint64(data);
	292	now = g_get_monotonic_time() / 1000;
	293	devc->end_time = now + devc->limit_msec;
	294	sr_dbg("Setting time limit to %" PRIu64 "ms.",
	295	devc->limit_msec);
	296	break;
	297	case SR_CONF_LIMIT_SAMPLES:
	298	devc->limit_samples = g_variant_get_uint64(data);
	299	sr_dbg("Setting sample limit to %" PRIu64 ".",
	300	devc->limit_samples);
	301	break;
0acdd793 BV	302	default:
	303	ret = SR_ERR_NA;
	304	}
	305
	306	return ret;
	307	}
	308
584560f1	309	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
0acdd793 BV	310	const struct sr_channel_group *cg)
0acdd793 BV	311	{
0acdd793	312	(void)sdi;
0acdd793 BV	313	(void)cg;
0acdd793 BV	314
0acdd793	315	switch (key) {
6dcb9723	316	case SR_CONF_SCAN_OPTIONS:
584560f1 BV	317	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	318	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
6dcb9723 BV	319	break;
6dcb9723 BV	320	case SR_CONF_DEVICE_OPTIONS:
584560f1 BV	321	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	322	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
6dcb9723	323	break;
0acdd793 BV	324	default:
	325	return SR_ERR_NA;
	326	}
	327
6dcb9723	328	return SR_OK;
0acdd793 BV	329	}
0acdd793 BV	330
6dcb9723	331	static void receive_data(struct sr_dev_inst sdi, unsigned char data, int len)
0acdd793	332	{
6dcb9723 BV	333	struct dev_context *devc;
6dcb9723 BV	334	int packet_size;
87895640	335	uint16_t crc;
6dcb9723 BV	336
	337	devc = sdi->priv;
	338
	339	if (devc->reply_size + len > MAX_REPLY_SIZE) {
	340	/* Something went very wrong. */
	341	sr_dbg("Receive buffer overrun.");
	342	devc->reply_size = 0;
	343	return;
	344	}
	345
	346	memcpy(devc->reply + devc->reply_size, data, len);
	347	devc->reply_size += len;
	348	/* Sixth byte contains the length of the packet. */
87895640 BV	349	if (devc->reply_size < 7)
	350	return;
	351
	352	packet_size = 7 + devc->reply[6] * 7 + 2;
	353	if (devc->reply_size < packet_size)
	354	return;
	355
	356	if (!testo_check_packet_prefix(devc->reply, devc->reply_size))
	357	return;
	358
	359	crc = crc16_mcrf4xx(0xffff, devc->reply, devc->reply_size - 2);
88b1d4e5	360	if (crc == RL16(&devc->reply[devc->reply_size - 2])) {
87895640 BV	361	testo_receive_packet(sdi);
	362	devc->num_samples++;
	363	} else {
	364	sr_dbg("Packet has invalid CRC.");
6dcb9723 BV	365	}
6dcb9723 BV	366
87895640 BV	367	devc->reply_size = 0;
	368	if (devc->limit_samples && devc->num_samples >= devc->limit_samples)
	369	dev_acquisition_stop(sdi, devc->cb_data);
	370	else
	371	testo_request_packet(sdi);
	372
6dcb9723 BV	373	}
	374
	375	SR_PRIV void receive_transfer(struct libusb_transfer *transfer)
	376	{
	377	struct dev_context *devc;
	378	struct sr_dev_inst *sdi;
	379	int ret;
	380
	381	sdi = transfer->user_data;
	382	devc = sdi->priv;
	383	if (transfer == devc->out_transfer)
	384	/* Just the command acknowledgement. */
	385	return;
	386
	387	if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
	388	/* USB device was unplugged. */
	389	dev_acquisition_stop(sdi, devc->cb_data);
	390	} else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
	391	/* First two bytes in any transfer are FTDI status bytes. */
	392	if (transfer->actual_length > 2)
	393	receive_data(sdi, transfer->buffer + 2, transfer->actual_length - 2);
	394	}
	395	/* Anything else is either an error or a timeout, which is fine:
	396	* we were just going to send another transfer request anyway. */
	397
	398	if (sdi->status == SR_ST_ACTIVE) {
	399	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	400	sr_err("Unable to resubmit transfer: %s.",
	401	libusb_error_name(ret));
	402	g_free(transfer->buffer);
	403	libusb_free_transfer(transfer);
	404	dev_acquisition_stop(sdi, devc->cb_data);
	405	}
	406	} else {
	407	/* This was the last transfer we're going to receive, so
	408	* clean up now. */
	409	g_free(transfer->buffer);
	410	libusb_free_transfer(transfer);
	411	}
	412	}
	413
	414	static int handle_events(int fd, int revents, void *cb_data)
	415	{
	416	struct dev_context *devc;
	417	struct drv_context *drvc = di->priv;
	418	struct sr_datafeed_packet packet;
	419	struct sr_dev_inst *sdi;
	420	struct timeval tv;
	421	gint64 now;
	422
	423	(void)fd;
	424	(void)revents;
	425
	426	sdi = cb_data;
	427	devc = sdi->priv;
	428
	429	if (devc->limit_msec) {
	430	now = g_get_monotonic_time() / 1000;
	431	if (now > devc->end_time)
	432	dev_acquisition_stop(sdi, devc->cb_data);
	433	}
	434
	435	if (sdi->status == SR_ST_STOPPING) {
102f1239	436	usb_source_remove(sdi->session, drvc->sr_ctx);
6dcb9723 BV	437
	438	dev_close(sdi);
	439
	440	packet.type = SR_DF_END;
	441	sr_session_send(sdi, &packet);
	442	}
	443
	444	memset(&tv, 0, sizeof(struct timeval));
	445	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
	446	NULL);
	447
	448	return TRUE;
	449	}
	450
	451	static int dev_acquisition_start(const struct sr_dev_inst sdi, void cb_data)
	452	{
	453	struct drv_context *drvc;
	454	struct dev_context *devc;
	455	struct sr_usb_dev_inst *usb;
	456	struct libusb_transfer *transfer;
	457	int ret;
	458	unsigned char *buf;
0acdd793	459
6dcb9723	460	drvc = di->priv;
0acdd793 BV	461	if (sdi->status != SR_ST_ACTIVE)
	462	return SR_ERR_DEV_CLOSED;
	463
6dcb9723 BV	464	if (!di->priv) {
	465	sr_err("Driver was not initialized.");
	466	return SR_ERR;
	467	}
	468
	469	devc = sdi->priv;
	470	usb = sdi->conn;
	471	devc->cb_data = cb_data;
	472	devc->end_time = 0;
	473	devc->num_samples = 0;
	474	devc->reply_size = 0;
	475
	476	/* Send header packet to the session bus. */
	477	std_session_send_df_header(cb_data, LOG_PREFIX);
	478
102f1239 BV	479	usb_source_add(sdi->session, drvc->sr_ctx, 100,
102f1239 BV	480	handle_events, (void *)sdi);
6dcb9723 BV	481
	482	if (testo_set_serial_params(usb) != SR_OK)
	483	return SR_ERR;
	484
	485	devc->out_transfer = libusb_alloc_transfer(0);
	486	if (testo_request_packet(sdi) != SR_OK)
	487	return SR_ERR;
	488
	489	buf = g_try_malloc(MAX_REPLY_SIZE);
	490	transfer = libusb_alloc_transfer(0);
	491	libusb_fill_bulk_transfer(transfer, usb->devhdl, EP_IN, buf,
	492	MAX_REPLY_SIZE, receive_transfer, (void *)sdi, 100);
	493	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	494	sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
	495	libusb_free_transfer(transfer);
	496	g_free(buf);
	497	return SR_ERR;
	498	}
	499	devc->reply_size = 0;
0acdd793 BV	500
	501	return SR_OK;
	502	}
	503
	504	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	505	{
	506	(void)cb_data;
	507
6dcb9723 BV	508	if (!di->priv) {
	509	sr_err("Driver was not initialized.");
	510	return SR_ERR;
	511	}
	512
0acdd793 BV	513	if (sdi->status != SR_ST_ACTIVE)
	514	return SR_ERR_DEV_CLOSED;
	515
6dcb9723	516	sdi->status = SR_ST_STOPPING;
0acdd793 BV	517
	518	return SR_OK;
	519	}
	520
	521	SR_PRIV struct sr_dev_driver testo_driver_info = {
	522	.name = "testo",
	523	.longname = "Testo",
	524	.api_version = 1,
	525	.init = init,
	526	.cleanup = cleanup,
	527	.scan = scan,
	528	.dev_list = dev_list,
	529	.dev_clear = dev_clear,
	530	.config_get = config_get,
	531	.config_set = config_set,
	532	.config_list = config_list,
	533	.dev_open = dev_open,
	534	.dev_close = dev_close,
	535	.dev_acquisition_start = dev_acquisition_start,
	536	.dev_acquisition_stop = dev_acquisition_stop,
	537	.priv = NULL,
	538	};