[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 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,
};

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->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 = 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->priv))->instances;
}

static int dev_clear(const struct sr_dev_driver *di)
{
	return std_dev_clear(di, NULL);
}

static int dev_open(struct sr_dev_inst *sdi)
{
	struct sr_dev_driver *di = sdi->driver;
	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_dev_driver *di = sdi->driver;
	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(const struct sr_dev_driver *di)
{
	int ret;
	struct drv_context *drvc;

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

	ret = dev_clear(di);
	g_free(drvc);

	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 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->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;
		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, devc->cb_data);
	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, 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 sr_dev_driver *di;
	struct dev_context *devc;
	struct drv_context *drvc;
	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;
	di = sdi->driver;
	drvc = di->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 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->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_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)
{
	struct sr_dev_driver *di = sdi->driver;
	(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	25	SR_PRIV struct sr_dev_driver testo_driver_info;
6dcb9723 BV	26	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data);
6dcb9723 BV	27
584560f1	28	static const uint32_t scanopts[] = {
6dcb9723 BV	29	SR_CONF_CONN,
	30	};
	31
584560f1	32	static const uint32_t devopts[] = {
6dcb9723	33	SR_CONF_MULTIMETER,
6dcb9723	34	SR_CONF_CONTINUOUS,
5827f61b BV	35	SR_CONF_LIMIT_SAMPLES \| SR_CONF_SET,
5827f61b BV	36	SR_CONF_LIMIT_MSEC \| SR_CONF_SET,
6dcb9723 BV	37	};
6dcb9723 BV	38
329733d9 UH	39	static const uint8_t TESTO_x35_REQUEST[] = { 0x12, 0, 0, 0, 1, 1, 0x55, 0xd1, 0xb7 };
	40
	41	static const struct testo_model models[] = {
6dcb9723 BV	42	{ "435", 9, TESTO_x35_REQUEST },
6dcb9723 BV	43	};
0acdd793	44
4f840ce9	45	static int init(struct sr_dev_driver di, struct sr_context sr_ctx)
0acdd793 BV	46	{
	47	return std_init(sr_ctx, di, LOG_PREFIX);
	48	}
	49
4f840ce9	50	static GSList scan(struct sr_dev_driver di, GSList *options)
0acdd793 BV	51	{
0acdd793 BV	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
aac29cc1	127	sdi = g_malloc0(sizeof(struct sr_dev_inst));
0af636be UH	128	sdi->status = SR_ST_INACTIVE;
	129	sdi->vendor = g_strdup("Testo");
	130	sdi->model = g_strdup("435/635/735");
6dcb9723 BV	131	sdi->driver = di;
	132	sdi->inst_type = SR_INST_USB;
	133	sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
	134	libusb_get_device_address(devlist[i]), NULL);
bde9fbd1	135	sdi->connection_id = g_strdup(connection_id);
6dcb9723 BV	136	devc = g_malloc(sizeof(struct dev_context));
	137	devc->model = &models[0];
	138	devc->limit_msec = 0;
	139	devc->limit_samples = 0;
	140	sdi->priv = devc;
	141	if (testo_probe_channels(sdi) != SR_OK)
	142	continue;
	143	drvc->instances = g_slist_append(drvc->instances, sdi);
	144	devices = g_slist_append(devices, sdi);
	145	}
	146	libusb_free_device_list(devlist, 1);
	147	g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
0acdd793 BV	148
	149	return devices;
	150	}
	151
4f840ce9	152	static GSList dev_list(const struct sr_dev_driver di)
0acdd793 BV	153	{
	154	return ((struct drv_context *)(di->priv))->instances;
	155	}
	156
4f840ce9	157	static int dev_clear(const struct sr_dev_driver *di)
0acdd793 BV	158	{
	159	return std_dev_clear(di, NULL);
	160	}
	161
	162	static int dev_open(struct sr_dev_inst *sdi)
	163	{
4f840ce9	164	struct sr_dev_driver *di = sdi->driver;
6dcb9723 BV	165	struct drv_context *drvc = di->priv;
	166	struct sr_usb_dev_inst *usb;
	167	libusb_device **devlist;
	168	int ret, i;
bde9fbd1	169	char connection_id[64];
6dcb9723 BV	170
	171	if (!di->priv) {
	172	sr_err("Driver was not initialized.");
	173	return SR_ERR;
	174	}
0acdd793	175
6dcb9723 BV	176	usb = sdi->conn;
	177	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
	178	for (i = 0; devlist[i]; i++) {
bde9fbd1 SA	179	usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
bde9fbd1 SA	180	if (strcmp(sdi->connection_id, connection_id))
6dcb9723 BV	181	continue;
	182	if ((ret = libusb_open(devlist[i], &usb->devhdl))) {
	183	sr_err("Failed to open device: %s.", libusb_error_name(ret));
	184	return SR_ERR;
	185	}
	186	break;
	187	}
	188	libusb_free_device_list(devlist, 1);
	189	if (!devlist[i]) {
	190	sr_err("Device not found.");
	191	return SR_ERR;
	192	}
0acdd793	193
88b1d4e5 BV	194	if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) {
	195	if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
	196	if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
	197	sr_err("Failed to detach kernel driver: %s.",
	198	libusb_error_name(ret));
	199	return SR_ERR;
	200	}
	201	}
	202	}
	203
6dcb9723 BV	204	if ((ret = libusb_claim_interface(usb->devhdl, 0))) {
	205	sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
	206	return SR_ERR;
	207	}
0acdd793 BV	208	sdi->status = SR_ST_ACTIVE;
	209
	210	return SR_OK;
	211	}
	212
	213	static int dev_close(struct sr_dev_inst *sdi)
	214	{
4f840ce9	215	struct sr_dev_driver *di = sdi->driver;
6dcb9723 BV	216	struct sr_usb_dev_inst *usb;
	217
	218	if (!di->priv) {
	219	sr_err("Driver was not initialized.");
	220	return SR_ERR;
	221	}
0acdd793	222
6dcb9723 BV	223	usb = sdi->conn;
	224	if (!usb->devhdl)
	225	/* Nothing to do. */
	226	return SR_OK;
0acdd793	227
6dcb9723 BV	228	libusb_release_interface(usb->devhdl, 0);
	229	libusb_close(usb->devhdl);
	230	usb->devhdl = NULL;
0acdd793 BV	231	sdi->status = SR_ST_INACTIVE;
	232
	233	return SR_OK;
	234	}
	235
4f840ce9	236	static int cleanup(const struct sr_dev_driver *di)
0acdd793	237	{
6dcb9723 BV	238	int ret;
6dcb9723 BV	239	struct drv_context *drvc;
0acdd793	240
6dcb9723 BV	241	if (!(drvc = di->priv))
6dcb9723 BV	242	return SR_OK;
0acdd793	243
4f840ce9	244	ret = dev_clear(di);
6dcb9723	245	g_free(drvc);
6dcb9723 BV	246
6dcb9723 BV	247	return ret;
0acdd793 BV	248	}
0acdd793 BV	249
584560f1	250	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
0acdd793 BV	251	const struct sr_channel_group *cg)
0acdd793 BV	252	{
6dcb9723 BV	253	struct sr_usb_dev_inst *usb;
6dcb9723 BV	254	char str[128];
0acdd793	255
0acdd793 BV	256	(void)cg;
0acdd793 BV	257
0acdd793	258	switch (key) {
6dcb9723 BV	259	case SR_CONF_CONN:
	260	if (!sdi \|\| !sdi->conn)
	261	return SR_ERR_ARG;
	262	usb = sdi->conn;
	263	snprintf(str, 128, "%d.%d", usb->bus, usb->address);
	264	*data = g_variant_new_string(str);
	265	break;
0acdd793 BV	266	default:
	267	return SR_ERR_NA;
	268	}
	269
6dcb9723	270	return SR_OK;
0acdd793 BV	271	}
0acdd793 BV	272
584560f1	273	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
0acdd793 BV	274	const struct sr_channel_group *cg)
0acdd793 BV	275	{
4f840ce9	276	struct sr_dev_driver *di = sdi->driver;
6dcb9723 BV	277	struct dev_context *devc;
6dcb9723 BV	278	gint64 now;
0acdd793 BV	279	int ret;
0acdd793 BV	280
0acdd793 BV	281	(void)cg;
	282
	283	if (sdi->status != SR_ST_ACTIVE)
	284	return SR_ERR_DEV_CLOSED;
	285
6dcb9723 BV	286	if (!di->priv) {
	287	sr_err("Driver was not initialized.");
	288	return SR_ERR;
	289	}
	290
	291	devc = sdi->priv;
0acdd793 BV	292	ret = SR_OK;
0acdd793 BV	293	switch (key) {
6dcb9723 BV	294	case SR_CONF_LIMIT_MSEC:
	295	devc->limit_msec = g_variant_get_uint64(data);
	296	now = g_get_monotonic_time() / 1000;
	297	devc->end_time = now + devc->limit_msec;
6dcb9723 BV	298	break;
	299	case SR_CONF_LIMIT_SAMPLES:
	300	devc->limit_samples = g_variant_get_uint64(data);
6dcb9723	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	}
6dcb9723 BV	374
55462b8b	375	SR_PRIV void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
6dcb9723 BV	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	{
4f840ce9	416	struct sr_dev_driver *di;
6dcb9723	417	struct dev_context *devc;
4f840ce9	418	struct drv_context *drvc;
6dcb9723 BV	419	struct sr_datafeed_packet packet;
	420	struct sr_dev_inst *sdi;
	421	struct timeval tv;
	422	gint64 now;
	423
	424	(void)fd;
	425	(void)revents;
	426
	427	sdi = cb_data;
	428	devc = sdi->priv;
4f840ce9 ML	429	di = sdi->driver;
4f840ce9 ML	430	drvc = di->priv;
6dcb9723 BV	431
	432	if (devc->limit_msec) {
	433	now = g_get_monotonic_time() / 1000;
	434	if (now > devc->end_time)
	435	dev_acquisition_stop(sdi, devc->cb_data);
	436	}
	437
	438	if (sdi->status == SR_ST_STOPPING) {
102f1239	439	usb_source_remove(sdi->session, drvc->sr_ctx);
6dcb9723 BV	440
	441	dev_close(sdi);
	442
	443	packet.type = SR_DF_END;
	444	sr_session_send(sdi, &packet);
	445	}
	446
	447	memset(&tv, 0, sizeof(struct timeval));
	448	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
	449	NULL);
	450
	451	return TRUE;
	452	}
	453
	454	static int dev_acquisition_start(const struct sr_dev_inst sdi, void cb_data)
	455	{
4f840ce9	456	struct sr_dev_driver *di = sdi->driver;
6dcb9723 BV	457	struct drv_context *drvc;
	458	struct dev_context *devc;
	459	struct sr_usb_dev_inst *usb;
	460	struct libusb_transfer *transfer;
	461	int ret;
	462	unsigned char *buf;
0acdd793	463
6dcb9723	464	drvc = di->priv;
0acdd793 BV	465	if (sdi->status != SR_ST_ACTIVE)
	466	return SR_ERR_DEV_CLOSED;
	467
6dcb9723 BV	468	if (!di->priv) {
	469	sr_err("Driver was not initialized.");
	470	return SR_ERR;
	471	}
	472
	473	devc = sdi->priv;
	474	usb = sdi->conn;
	475	devc->cb_data = cb_data;
	476	devc->end_time = 0;
	477	devc->num_samples = 0;
	478	devc->reply_size = 0;
	479
	480	/* Send header packet to the session bus. */
	481	std_session_send_df_header(cb_data, LOG_PREFIX);
	482
102f1239 BV	483	usb_source_add(sdi->session, drvc->sr_ctx, 100,
102f1239 BV	484	handle_events, (void *)sdi);
6dcb9723 BV	485
	486	if (testo_set_serial_params(usb) != SR_OK)
	487	return SR_ERR;
	488
	489	devc->out_transfer = libusb_alloc_transfer(0);
	490	if (testo_request_packet(sdi) != SR_OK)
	491	return SR_ERR;
	492
a95f142e	493	buf = g_malloc(MAX_REPLY_SIZE);
6dcb9723 BV	494	transfer = libusb_alloc_transfer(0);
	495	libusb_fill_bulk_transfer(transfer, usb->devhdl, EP_IN, buf,
	496	MAX_REPLY_SIZE, receive_transfer, (void *)sdi, 100);
	497	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	498	sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
	499	libusb_free_transfer(transfer);
	500	g_free(buf);
	501	return SR_ERR;
	502	}
	503	devc->reply_size = 0;
0acdd793 BV	504
	505	return SR_OK;
	506	}
	507
	508	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	509	{
4f840ce9	510	struct sr_dev_driver *di = sdi->driver;
0acdd793 BV	511	(void)cb_data;
0acdd793 BV	512
6dcb9723 BV	513	if (!di->priv) {
	514	sr_err("Driver was not initialized.");
	515	return SR_ERR;
	516	}
	517
0acdd793 BV	518	if (sdi->status != SR_ST_ACTIVE)
	519	return SR_ERR_DEV_CLOSED;
	520
6dcb9723	521	sdi->status = SR_ST_STOPPING;
0acdd793 BV	522
	523	return SR_OK;
	524	}
	525
	526	SR_PRIV struct sr_dev_driver testo_driver_info = {
	527	.name = "testo",
	528	.longname = "Testo",
	529	.api_version = 1,
	530	.init = init,
	531	.cleanup = cleanup,
	532	.scan = scan,
	533	.dev_list = dev_list,
	534	.dev_clear = dev_clear,
	535	.config_get = config_get,
	536	.config_set = config_set,
	537	.config_list = config_list,
	538	.dev_open = dev_open,
	539	.dev_close = dev_close,
	540	.dev_acquisition_start = dev_acquisition_start,
	541	.dev_acquisition_stop = dev_acquisition_stop,
	542	.priv = NULL,
	543	};