[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 <config.h>
#include <string.h>
#include "protocol.h"

#define SERIALCOMM "115200/8n1"

SR_PRIV struct sr_dev_driver testo_driver_info;
static int dev_acquisition_stop(struct sr_dev_inst *sdi);

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,
};

static const uint8_t TESTO_x35_REQUEST[] = { 0x12, 0, 0, 0, 1, 1, 0x55, 0xd1, 0xb7 };

static const struct testo_model models[] = {
	{ "435", 9, TESTO_x35_REQUEST },
};

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

static GSList *scan(struct sr_dev_driver *di, 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->context;
	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;
		}

		libusb_get_device_descriptor(devlist[i], &des);

		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 = g_malloc0(sizeof(struct sr_dev_inst));
		sdi->status = SR_ST_INACTIVE;
		sdi->vendor = g_strdup("Testo");
		sdi->model = g_strdup("435/635/735");
		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(const struct sr_dev_driver *di)
{
	return ((struct drv_context *)(di->context))->instances;
}

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

	if (!di->context) {
		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_dev_driver *di = sdi->driver;
	struct sr_usb_dev_inst *usb;

	if (!di->context) {
		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 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 sr_dev_driver *di = sdi->driver;
	struct dev_context *devc;
	gint64 now;
	int ret;

	(void)cg;

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

	if (!di->context) {
		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;
		break;
	case SR_CONF_LIMIT_SAMPLES:
		devc->limit_samples = g_variant_get_uint64(data);
		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);
	else
		testo_request_packet(sdi);

}

SR_PRIV void LIBUSB_CALL 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);
	} 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);
		}
	} 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 sr_dev_driver *di;
	struct dev_context *devc;
	struct drv_context *drvc;
	struct sr_dev_inst *sdi;
	struct timeval tv;
	gint64 now;

	(void)fd;
	(void)revents;

	sdi = cb_data;
	devc = sdi->priv;
	di = sdi->driver;
	drvc = di->context;

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

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

	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)
{
	struct sr_dev_driver *di = sdi->driver;
	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->context;
	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

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

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

	std_session_send_df_header(sdi, 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_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)
{
	struct sr_dev_driver *di = sdi->driver;

	if (!di->context) {
		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 = std_cleanup,
	.scan = scan,
	.dev_list = dev_list,
	.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,
	.context = 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
6ec6c43b	20	#include <config.h>
6dcb9723	21	#include <string.h>
0acdd793 BV	22	#include "protocol.h"
0acdd793 BV	23
6dcb9723 BV	24	#define SERIALCOMM "115200/8n1"
6dcb9723 BV	25
0acdd793	26	SR_PRIV struct sr_dev_driver testo_driver_info;
695dc859	27	static int dev_acquisition_stop(struct sr_dev_inst *sdi);
6dcb9723	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	};
6dcb9723 BV	39
329733d9 UH	40	static const uint8_t TESTO_x35_REQUEST[] = { 0x12, 0, 0, 0, 1, 1, 0x55, 0xd1, 0xb7 };
	41
	42	static const struct testo_model models[] = {
6dcb9723 BV	43	{ "435", 9, TESTO_x35_REQUEST },
6dcb9723 BV	44	};
0acdd793	45
4f840ce9	46	static int init(struct sr_dev_driver di, struct sr_context sr_ctx)
0acdd793 BV	47	{
	48	return std_init(sr_ctx, di, LOG_PREFIX);
	49	}
	50
4f840ce9	51	static GSList scan(struct sr_dev_driver di, GSList *options)
0acdd793 BV	52	{
0acdd793 BV	53	struct drv_context *drvc;
6dcb9723 BV	54	struct dev_context *devc;
	55	struct sr_config *src;
	56	struct sr_dev_inst *sdi;
	57	struct sr_usb_dev_inst *usb;
	58	struct libusb_device_descriptor des;
	59	libusb_device **devlist;
	60	struct libusb_device_handle *hdl;
	61	GSList conn_devices, devices, *l;
bde9fbd1	62	int ret, i;
6dcb9723	63	const char *str;
bde9fbd1	64	char manufacturer[64], product[64], connection_id[64];
0acdd793 BV	65
0acdd793 BV	66	devices = NULL;
41812aca	67	drvc = di->context;
0acdd793 BV	68	drvc->instances = NULL;
0acdd793 BV	69
6dcb9723 BV	70	conn_devices = NULL;
	71	for (l = options; l; l = l->next) {
	72	src = l->data;
	73	if (src->key != SR_CONF_CONN)
	74	continue;
	75	str = g_variant_get_string(src->data, NULL);
	76	conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, str);
	77	}
	78
	79	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
	80	for (i = 0; devlist[i]; i++) {
	81	if (conn_devices) {
	82	usb = NULL;
	83	for (l = conn_devices; l; l = l->next) {
	84	usb = l->data;
	85	if (usb->bus == libusb_get_bus_number(devlist[i])
	86	&& usb->address == libusb_get_device_address(devlist[i]))
	87	break;
	88	}
	89	if (!l)
	90	/* This device matched none of the ones that
	91	* matched the conn specification. */
	92	continue;
	93	}
	94
2a8f2d41	95	libusb_get_device_descriptor(devlist[i], &des);
6dcb9723 BV	96
	97	if ((ret = libusb_open(devlist[i], &hdl)) < 0)
	98	continue;
	99
	100	manufacturer[0] = product[0] = '\0';
	101	if (des.iManufacturer && (ret = libusb_get_string_descriptor_ascii(
	102	hdl, des.iManufacturer, (unsigned char *) manufacturer,
	103	sizeof(manufacturer))) < 0) {
	104	sr_warn("Failed to get manufacturer string descriptor: %s.",
	105	libusb_error_name(ret));
	106	}
	107	if (des.iProduct && (ret = libusb_get_string_descriptor_ascii(
	108	hdl, des.iProduct, (unsigned char *) product,
	109	sizeof(product))) < 0) {
	110	sr_warn("Failed to get product string descriptor: %s.",
	111	libusb_error_name(ret));
	112	}
	113	libusb_close(hdl);
	114
	115	if (strncmp(manufacturer, "testo", 5))
	116	continue;
	117
bde9fbd1 SA	118	usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
bde9fbd1 SA	119
6dcb9723 BV	120	/* Hardcode the 435 for now.*/
	121	if (strcmp(product, "testo 435/635/735"))
	122	continue;
	123
aac29cc1	124	sdi = g_malloc0(sizeof(struct sr_dev_inst));
0af636be UH	125	sdi->status = SR_ST_INACTIVE;
	126	sdi->vendor = g_strdup("Testo");
	127	sdi->model = g_strdup("435/635/735");
6dcb9723 BV	128	sdi->driver = di;
	129	sdi->inst_type = SR_INST_USB;
	130	sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
	131	libusb_get_device_address(devlist[i]), NULL);
bde9fbd1	132	sdi->connection_id = g_strdup(connection_id);
6dcb9723 BV	133	devc = g_malloc(sizeof(struct dev_context));
	134	devc->model = &models[0];
	135	devc->limit_msec = 0;
	136	devc->limit_samples = 0;
	137	sdi->priv = devc;
	138	if (testo_probe_channels(sdi) != SR_OK)
	139	continue;
	140	drvc->instances = g_slist_append(drvc->instances, sdi);
	141	devices = g_slist_append(devices, sdi);
	142	}
	143	libusb_free_device_list(devlist, 1);
	144	g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
0acdd793 BV	145
	146	return devices;
	147	}
	148
4f840ce9	149	static GSList dev_list(const struct sr_dev_driver di)
0acdd793	150	{
41812aca	151	return ((struct drv_context *)(di->context))->instances;
0acdd793 BV	152	}
0acdd793 BV	153
0acdd793 BV	154	static int dev_open(struct sr_dev_inst *sdi)
0acdd793 BV	155	{
4f840ce9	156	struct sr_dev_driver *di = sdi->driver;
41812aca	157	struct drv_context *drvc = di->context;
6dcb9723 BV	158	struct sr_usb_dev_inst *usb;
	159	libusb_device **devlist;
	160	int ret, i;
bde9fbd1	161	char connection_id[64];
6dcb9723	162
41812aca	163	if (!di->context) {
6dcb9723 BV	164	sr_err("Driver was not initialized.");
	165	return SR_ERR;
	166	}
0acdd793	167
6dcb9723 BV	168	usb = sdi->conn;
	169	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
	170	for (i = 0; devlist[i]; i++) {
bde9fbd1 SA	171	usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
bde9fbd1 SA	172	if (strcmp(sdi->connection_id, connection_id))
6dcb9723 BV	173	continue;
	174	if ((ret = libusb_open(devlist[i], &usb->devhdl))) {
	175	sr_err("Failed to open device: %s.", libusb_error_name(ret));
	176	return SR_ERR;
	177	}
	178	break;
	179	}
	180	libusb_free_device_list(devlist, 1);
	181	if (!devlist[i]) {
	182	sr_err("Device not found.");
	183	return SR_ERR;
	184	}
0acdd793	185
88b1d4e5 BV	186	if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) {
	187	if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
	188	if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
	189	sr_err("Failed to detach kernel driver: %s.",
	190	libusb_error_name(ret));
	191	return SR_ERR;
	192	}
	193	}
	194	}
	195
6dcb9723 BV	196	if ((ret = libusb_claim_interface(usb->devhdl, 0))) {
	197	sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
	198	return SR_ERR;
	199	}
0acdd793 BV	200	sdi->status = SR_ST_ACTIVE;
	201
	202	return SR_OK;
	203	}
	204
	205	static int dev_close(struct sr_dev_inst *sdi)
	206	{
4f840ce9	207	struct sr_dev_driver *di = sdi->driver;
6dcb9723 BV	208	struct sr_usb_dev_inst *usb;
6dcb9723 BV	209
41812aca	210	if (!di->context) {
6dcb9723 BV	211	sr_err("Driver was not initialized.");
	212	return SR_ERR;
	213	}
0acdd793	214
6dcb9723 BV	215	usb = sdi->conn;
	216	if (!usb->devhdl)
	217	/* Nothing to do. */
	218	return SR_OK;
0acdd793	219
6dcb9723 BV	220	libusb_release_interface(usb->devhdl, 0);
	221	libusb_close(usb->devhdl);
	222	usb->devhdl = NULL;
0acdd793 BV	223	sdi->status = SR_ST_INACTIVE;
	224
	225	return SR_OK;
	226	}
	227
584560f1	228	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
0acdd793 BV	229	const struct sr_channel_group *cg)
0acdd793 BV	230	{
6dcb9723 BV	231	struct sr_usb_dev_inst *usb;
6dcb9723 BV	232	char str[128];
0acdd793	233
0acdd793 BV	234	(void)cg;
0acdd793 BV	235
0acdd793	236	switch (key) {
6dcb9723 BV	237	case SR_CONF_CONN:
	238	if (!sdi \|\| !sdi->conn)
	239	return SR_ERR_ARG;
	240	usb = sdi->conn;
	241	snprintf(str, 128, "%d.%d", usb->bus, usb->address);
	242	*data = g_variant_new_string(str);
	243	break;
0acdd793 BV	244	default:
	245	return SR_ERR_NA;
	246	}
	247
6dcb9723	248	return SR_OK;
0acdd793 BV	249	}
0acdd793 BV	250
584560f1	251	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
0acdd793 BV	252	const struct sr_channel_group *cg)
0acdd793 BV	253	{
4f840ce9	254	struct sr_dev_driver *di = sdi->driver;
6dcb9723 BV	255	struct dev_context *devc;
6dcb9723 BV	256	gint64 now;
0acdd793 BV	257	int ret;
0acdd793 BV	258
0acdd793 BV	259	(void)cg;
	260
	261	if (sdi->status != SR_ST_ACTIVE)
	262	return SR_ERR_DEV_CLOSED;
	263
41812aca	264	if (!di->context) {
6dcb9723 BV	265	sr_err("Driver was not initialized.");
	266	return SR_ERR;
	267	}
	268
	269	devc = sdi->priv;
0acdd793 BV	270	ret = SR_OK;
0acdd793 BV	271	switch (key) {
6dcb9723 BV	272	case SR_CONF_LIMIT_MSEC:
	273	devc->limit_msec = g_variant_get_uint64(data);
	274	now = g_get_monotonic_time() / 1000;
	275	devc->end_time = now + devc->limit_msec;
6dcb9723 BV	276	break;
	277	case SR_CONF_LIMIT_SAMPLES:
	278	devc->limit_samples = g_variant_get_uint64(data);
6dcb9723	279	break;
0acdd793 BV	280	default:
	281	ret = SR_ERR_NA;
	282	}
	283
	284	return ret;
	285	}
	286
584560f1	287	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
0acdd793 BV	288	const struct sr_channel_group *cg)
0acdd793 BV	289	{
0acdd793	290	(void)sdi;
0acdd793 BV	291	(void)cg;
0acdd793 BV	292
0acdd793	293	switch (key) {
6dcb9723	294	case SR_CONF_SCAN_OPTIONS:
584560f1 BV	295	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	296	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
6dcb9723 BV	297	break;
6dcb9723 BV	298	case SR_CONF_DEVICE_OPTIONS:
584560f1 BV	299	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	300	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
6dcb9723	301	break;
0acdd793 BV	302	default:
	303	return SR_ERR_NA;
	304	}
	305
6dcb9723	306	return SR_OK;
0acdd793 BV	307	}
0acdd793 BV	308
6dcb9723	309	static void receive_data(struct sr_dev_inst sdi, unsigned char data, int len)
0acdd793	310	{
6dcb9723 BV	311	struct dev_context *devc;
6dcb9723 BV	312	int packet_size;
87895640	313	uint16_t crc;
6dcb9723 BV	314
	315	devc = sdi->priv;
	316
	317	if (devc->reply_size + len > MAX_REPLY_SIZE) {
	318	/* Something went very wrong. */
	319	sr_dbg("Receive buffer overrun.");
	320	devc->reply_size = 0;
	321	return;
	322	}
	323
	324	memcpy(devc->reply + devc->reply_size, data, len);
	325	devc->reply_size += len;
	326	/* Sixth byte contains the length of the packet. */
87895640 BV	327	if (devc->reply_size < 7)
	328	return;
	329
	330	packet_size = 7 + devc->reply[6] * 7 + 2;
	331	if (devc->reply_size < packet_size)
	332	return;
	333
	334	if (!testo_check_packet_prefix(devc->reply, devc->reply_size))
	335	return;
	336
	337	crc = crc16_mcrf4xx(0xffff, devc->reply, devc->reply_size - 2);
88b1d4e5	338	if (crc == RL16(&devc->reply[devc->reply_size - 2])) {
87895640 BV	339	testo_receive_packet(sdi);
	340	devc->num_samples++;
	341	} else {
	342	sr_dbg("Packet has invalid CRC.");
6dcb9723 BV	343	}
6dcb9723 BV	344
87895640 BV	345	devc->reply_size = 0;
87895640 BV	346	if (devc->limit_samples && devc->num_samples >= devc->limit_samples)
695dc859	347	dev_acquisition_stop(sdi);
87895640 BV	348	else
	349	testo_request_packet(sdi);
	350
6dcb9723 BV	351	}
6dcb9723 BV	352
55462b8b	353	SR_PRIV void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
6dcb9723 BV	354	{
	355	struct dev_context *devc;
	356	struct sr_dev_inst *sdi;
	357	int ret;
	358
	359	sdi = transfer->user_data;
	360	devc = sdi->priv;
	361	if (transfer == devc->out_transfer)
	362	/* Just the command acknowledgement. */
	363	return;
	364
	365	if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
	366	/* USB device was unplugged. */
695dc859	367	dev_acquisition_stop(sdi);
6dcb9723 BV	368	} else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
	369	/* First two bytes in any transfer are FTDI status bytes. */
	370	if (transfer->actual_length > 2)
	371	receive_data(sdi, transfer->buffer + 2, transfer->actual_length - 2);
	372	}
	373	/* Anything else is either an error or a timeout, which is fine:
	374	* we were just going to send another transfer request anyway. */
	375
	376	if (sdi->status == SR_ST_ACTIVE) {
	377	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	378	sr_err("Unable to resubmit transfer: %s.",
	379	libusb_error_name(ret));
	380	g_free(transfer->buffer);
	381	libusb_free_transfer(transfer);
695dc859	382	dev_acquisition_stop(sdi);
6dcb9723 BV	383	}
	384	} else {
	385	/* This was the last transfer we're going to receive, so
	386	* clean up now. */
	387	g_free(transfer->buffer);
	388	libusb_free_transfer(transfer);
	389	}
	390	}
	391
	392	static int handle_events(int fd, int revents, void *cb_data)
	393	{
4f840ce9	394	struct sr_dev_driver *di;
6dcb9723	395	struct dev_context *devc;
4f840ce9	396	struct drv_context *drvc;
6dcb9723 BV	397	struct sr_dev_inst *sdi;
	398	struct timeval tv;
	399	gint64 now;
	400
	401	(void)fd;
	402	(void)revents;
	403
	404	sdi = cb_data;
	405	devc = sdi->priv;
4f840ce9	406	di = sdi->driver;
41812aca	407	drvc = di->context;
6dcb9723 BV	408
	409	if (devc->limit_msec) {
	410	now = g_get_monotonic_time() / 1000;
	411	if (now > devc->end_time)
695dc859	412	dev_acquisition_stop(sdi);
6dcb9723 BV	413	}
	414
	415	if (sdi->status == SR_ST_STOPPING) {
102f1239	416	usb_source_remove(sdi->session, drvc->sr_ctx);
6dcb9723	417	dev_close(sdi);
3be42bc2	418	std_session_send_df_end(sdi, LOG_PREFIX);
6dcb9723 BV	419	}
	420
	421	memset(&tv, 0, sizeof(struct timeval));
	422	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
	423	NULL);
	424
	425	return TRUE;
	426	}
	427
695dc859	428	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
6dcb9723	429	{
4f840ce9	430	struct sr_dev_driver *di = sdi->driver;
6dcb9723 BV	431	struct drv_context *drvc;
	432	struct dev_context *devc;
	433	struct sr_usb_dev_inst *usb;
	434	struct libusb_transfer *transfer;
	435	int ret;
	436	unsigned char *buf;
0acdd793	437
41812aca	438	drvc = di->context;
0acdd793 BV	439	if (sdi->status != SR_ST_ACTIVE)
	440	return SR_ERR_DEV_CLOSED;
	441
41812aca	442	if (!di->context) {
6dcb9723 BV	443	sr_err("Driver was not initialized.");
	444	return SR_ERR;
	445	}
	446
	447	devc = sdi->priv;
	448	usb = sdi->conn;
6dcb9723 BV	449	devc->end_time = 0;
	450	devc->num_samples = 0;
	451	devc->reply_size = 0;
	452
695dc859	453	std_session_send_df_header(sdi, LOG_PREFIX);
6dcb9723	454
102f1239 BV	455	usb_source_add(sdi->session, drvc->sr_ctx, 100,
102f1239 BV	456	handle_events, (void *)sdi);
6dcb9723 BV	457
	458	if (testo_set_serial_params(usb) != SR_OK)
	459	return SR_ERR;
	460
	461	devc->out_transfer = libusb_alloc_transfer(0);
	462	if (testo_request_packet(sdi) != SR_OK)
	463	return SR_ERR;
	464
a95f142e	465	buf = g_malloc(MAX_REPLY_SIZE);
6dcb9723 BV	466	transfer = libusb_alloc_transfer(0);
	467	libusb_fill_bulk_transfer(transfer, usb->devhdl, EP_IN, buf,
	468	MAX_REPLY_SIZE, receive_transfer, (void *)sdi, 100);
	469	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	470	sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
	471	libusb_free_transfer(transfer);
	472	g_free(buf);
	473	return SR_ERR;
	474	}
	475	devc->reply_size = 0;
0acdd793 BV	476
	477	return SR_OK;
	478	}
	479
695dc859	480	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
0acdd793	481	{
4f840ce9	482	struct sr_dev_driver *di = sdi->driver;
0acdd793	483
41812aca	484	if (!di->context) {
6dcb9723 BV	485	sr_err("Driver was not initialized.");
	486	return SR_ERR;
	487	}
	488
0acdd793 BV	489	if (sdi->status != SR_ST_ACTIVE)
	490	return SR_ERR_DEV_CLOSED;
	491
6dcb9723	492	sdi->status = SR_ST_STOPPING;
0acdd793 BV	493
	494	return SR_OK;
	495	}
	496
	497	SR_PRIV struct sr_dev_driver testo_driver_info = {
	498	.name = "testo",
	499	.longname = "Testo",
	500	.api_version = 1,
	501	.init = init,
700d6b64	502	.cleanup = std_cleanup,
0acdd793 BV	503	.scan = scan,
0acdd793 BV	504	.dev_list = dev_list,
0acdd793 BV	505	.config_get = config_get,
	506	.config_set = config_set,
	507	.config_list = config_list,
	508	.dev_open = dev_open,
	509	.dev_close = dev_close,
	510	.dev_acquisition_start = dev_acquisition_start,
	511	.dev_acquisition_stop = dev_acquisition_stop,
41812aca	512	.context = NULL,
0acdd793	513	};