[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, 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->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;
		}

		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->context))->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->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 cleanup(const struct sr_dev_driver *di)
{
	int ret;
	struct drv_context *drvc;

	if (!(drvc = di->context))
		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->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, 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->context;

	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->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->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->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 = 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,
	.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;
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	};
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
	95	if ((ret = libusb_get_device_descriptor( devlist[i], &des)) != 0) {
	96	sr_warn("Failed to get device descriptor: %s.",
	97	libusb_error_name(ret));
	98	continue;
	99	}
	100
	101	if ((ret = libusb_open(devlist[i], &hdl)) < 0)
	102	continue;
	103
	104	manufacturer[0] = product[0] = '\0';
	105	if (des.iManufacturer && (ret = libusb_get_string_descriptor_ascii(
	106	hdl, des.iManufacturer, (unsigned char *) manufacturer,
	107	sizeof(manufacturer))) < 0) {
	108	sr_warn("Failed to get manufacturer string descriptor: %s.",
	109	libusb_error_name(ret));
	110	}
	111	if (des.iProduct && (ret = libusb_get_string_descriptor_ascii(
	112	hdl, des.iProduct, (unsigned char *) product,
	113	sizeof(product))) < 0) {
	114	sr_warn("Failed to get product string descriptor: %s.",
	115	libusb_error_name(ret));
	116	}
	117	libusb_close(hdl);
	118
	119	if (strncmp(manufacturer, "testo", 5))
	120	continue;
	121
bde9fbd1 SA	122	usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
bde9fbd1 SA	123
6dcb9723 BV	124	/* Hardcode the 435 for now.*/
	125	if (strcmp(product, "testo 435/635/735"))
	126	continue;
	127
aac29cc1	128	sdi = g_malloc0(sizeof(struct sr_dev_inst));
0af636be UH	129	sdi->status = SR_ST_INACTIVE;
	130	sdi->vendor = g_strdup("Testo");
	131	sdi->model = g_strdup("435/635/735");
6dcb9723 BV	132	sdi->driver = di;
	133	sdi->inst_type = SR_INST_USB;
	134	sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
	135	libusb_get_device_address(devlist[i]), NULL);
bde9fbd1	136	sdi->connection_id = g_strdup(connection_id);
6dcb9723 BV	137	devc = g_malloc(sizeof(struct dev_context));
	138	devc->model = &models[0];
	139	devc->limit_msec = 0;
	140	devc->limit_samples = 0;
	141	sdi->priv = devc;
	142	if (testo_probe_channels(sdi) != SR_OK)
	143	continue;
	144	drvc->instances = g_slist_append(drvc->instances, sdi);
	145	devices = g_slist_append(devices, sdi);
	146	}
	147	libusb_free_device_list(devlist, 1);
	148	g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
0acdd793 BV	149
	150	return devices;
	151	}
	152
4f840ce9	153	static GSList dev_list(const struct sr_dev_driver di)
0acdd793	154	{
41812aca	155	return ((struct drv_context *)(di->context))->instances;
0acdd793 BV	156	}
0acdd793 BV	157
4f840ce9	158	static int dev_clear(const struct sr_dev_driver *di)
0acdd793 BV	159	{
	160	return std_dev_clear(di, NULL);
	161	}
	162
	163	static int dev_open(struct sr_dev_inst *sdi)
	164	{
4f840ce9	165	struct sr_dev_driver *di = sdi->driver;
41812aca	166	struct drv_context *drvc = di->context;
6dcb9723 BV	167	struct sr_usb_dev_inst *usb;
	168	libusb_device **devlist;
	169	int ret, i;
bde9fbd1	170	char connection_id[64];
6dcb9723	171
41812aca	172	if (!di->context) {
6dcb9723 BV	173	sr_err("Driver was not initialized.");
	174	return SR_ERR;
	175	}
0acdd793	176
6dcb9723 BV	177	usb = sdi->conn;
	178	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
	179	for (i = 0; devlist[i]; i++) {
bde9fbd1 SA	180	usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
bde9fbd1 SA	181	if (strcmp(sdi->connection_id, connection_id))
6dcb9723 BV	182	continue;
	183	if ((ret = libusb_open(devlist[i], &usb->devhdl))) {
	184	sr_err("Failed to open device: %s.", libusb_error_name(ret));
	185	return SR_ERR;
	186	}
	187	break;
	188	}
	189	libusb_free_device_list(devlist, 1);
	190	if (!devlist[i]) {
	191	sr_err("Device not found.");
	192	return SR_ERR;
	193	}
0acdd793	194
88b1d4e5 BV	195	if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) {
	196	if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
	197	if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
	198	sr_err("Failed to detach kernel driver: %s.",
	199	libusb_error_name(ret));
	200	return SR_ERR;
	201	}
	202	}
	203	}
	204
6dcb9723 BV	205	if ((ret = libusb_claim_interface(usb->devhdl, 0))) {
	206	sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
	207	return SR_ERR;
	208	}
0acdd793 BV	209	sdi->status = SR_ST_ACTIVE;
	210
	211	return SR_OK;
	212	}
	213
	214	static int dev_close(struct sr_dev_inst *sdi)
	215	{
4f840ce9	216	struct sr_dev_driver *di = sdi->driver;
6dcb9723 BV	217	struct sr_usb_dev_inst *usb;
6dcb9723 BV	218
41812aca	219	if (!di->context) {
6dcb9723 BV	220	sr_err("Driver was not initialized.");
	221	return SR_ERR;
	222	}
0acdd793	223
6dcb9723 BV	224	usb = sdi->conn;
	225	if (!usb->devhdl)
	226	/* Nothing to do. */
	227	return SR_OK;
0acdd793	228
6dcb9723 BV	229	libusb_release_interface(usb->devhdl, 0);
	230	libusb_close(usb->devhdl);
	231	usb->devhdl = NULL;
0acdd793 BV	232	sdi->status = SR_ST_INACTIVE;
	233
	234	return SR_OK;
	235	}
	236
4f840ce9	237	static int cleanup(const struct sr_dev_driver *di)
0acdd793	238	{
6dcb9723 BV	239	int ret;
6dcb9723 BV	240	struct drv_context *drvc;
0acdd793	241
41812aca	242	if (!(drvc = di->context))
6dcb9723	243	return SR_OK;
0acdd793	244
4f840ce9	245	ret = dev_clear(di);
6dcb9723	246	g_free(drvc);
6dcb9723 BV	247
6dcb9723 BV	248	return ret;
0acdd793 BV	249	}
0acdd793 BV	250
584560f1	251	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
0acdd793 BV	252	const struct sr_channel_group *cg)
0acdd793 BV	253	{
6dcb9723 BV	254	struct sr_usb_dev_inst *usb;
6dcb9723 BV	255	char str[128];
0acdd793	256
0acdd793 BV	257	(void)cg;
0acdd793 BV	258
0acdd793	259	switch (key) {
6dcb9723 BV	260	case SR_CONF_CONN:
	261	if (!sdi \|\| !sdi->conn)
	262	return SR_ERR_ARG;
	263	usb = sdi->conn;
	264	snprintf(str, 128, "%d.%d", usb->bus, usb->address);
	265	*data = g_variant_new_string(str);
	266	break;
0acdd793 BV	267	default:
	268	return SR_ERR_NA;
	269	}
	270
6dcb9723	271	return SR_OK;
0acdd793 BV	272	}
0acdd793 BV	273
584560f1	274	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
0acdd793 BV	275	const struct sr_channel_group *cg)
0acdd793 BV	276	{
4f840ce9	277	struct sr_dev_driver *di = sdi->driver;
6dcb9723 BV	278	struct dev_context *devc;
6dcb9723 BV	279	gint64 now;
0acdd793 BV	280	int ret;
0acdd793 BV	281
0acdd793 BV	282	(void)cg;
	283
	284	if (sdi->status != SR_ST_ACTIVE)
	285	return SR_ERR_DEV_CLOSED;
	286
41812aca	287	if (!di->context) {
6dcb9723 BV	288	sr_err("Driver was not initialized.");
	289	return SR_ERR;
	290	}
	291
	292	devc = sdi->priv;
0acdd793 BV	293	ret = SR_OK;
0acdd793 BV	294	switch (key) {
6dcb9723 BV	295	case SR_CONF_LIMIT_MSEC:
	296	devc->limit_msec = g_variant_get_uint64(data);
	297	now = g_get_monotonic_time() / 1000;
	298	devc->end_time = now + devc->limit_msec;
6dcb9723 BV	299	break;
	300	case SR_CONF_LIMIT_SAMPLES:
	301	devc->limit_samples = g_variant_get_uint64(data);
6dcb9723	302	break;
0acdd793 BV	303	default:
	304	ret = SR_ERR_NA;
	305	}
	306
	307	return ret;
	308	}
	309
584560f1	310	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
0acdd793 BV	311	const struct sr_channel_group *cg)
0acdd793 BV	312	{
0acdd793	313	(void)sdi;
0acdd793 BV	314	(void)cg;
0acdd793 BV	315
0acdd793	316	switch (key) {
6dcb9723	317	case SR_CONF_SCAN_OPTIONS:
584560f1 BV	318	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	319	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
6dcb9723 BV	320	break;
6dcb9723 BV	321	case SR_CONF_DEVICE_OPTIONS:
584560f1 BV	322	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	323	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
6dcb9723	324	break;
0acdd793 BV	325	default:
	326	return SR_ERR_NA;
	327	}
	328
6dcb9723	329	return SR_OK;
0acdd793 BV	330	}
0acdd793 BV	331
6dcb9723	332	static void receive_data(struct sr_dev_inst sdi, unsigned char data, int len)
0acdd793	333	{
6dcb9723 BV	334	struct dev_context *devc;
6dcb9723 BV	335	int packet_size;
87895640	336	uint16_t crc;
6dcb9723 BV	337
	338	devc = sdi->priv;
	339
	340	if (devc->reply_size + len > MAX_REPLY_SIZE) {
	341	/* Something went very wrong. */
	342	sr_dbg("Receive buffer overrun.");
	343	devc->reply_size = 0;
	344	return;
	345	}
	346
	347	memcpy(devc->reply + devc->reply_size, data, len);
	348	devc->reply_size += len;
	349	/* Sixth byte contains the length of the packet. */
87895640 BV	350	if (devc->reply_size < 7)
	351	return;
	352
	353	packet_size = 7 + devc->reply[6] * 7 + 2;
	354	if (devc->reply_size < packet_size)
	355	return;
	356
	357	if (!testo_check_packet_prefix(devc->reply, devc->reply_size))
	358	return;
	359
	360	crc = crc16_mcrf4xx(0xffff, devc->reply, devc->reply_size - 2);
88b1d4e5	361	if (crc == RL16(&devc->reply[devc->reply_size - 2])) {
87895640 BV	362	testo_receive_packet(sdi);
	363	devc->num_samples++;
	364	} else {
	365	sr_dbg("Packet has invalid CRC.");
6dcb9723 BV	366	}
6dcb9723 BV	367
87895640 BV	368	devc->reply_size = 0;
	369	if (devc->limit_samples && devc->num_samples >= devc->limit_samples)
	370	dev_acquisition_stop(sdi, devc->cb_data);
	371	else
	372	testo_request_packet(sdi);
	373
6dcb9723 BV	374	}
6dcb9723 BV	375
55462b8b	376	SR_PRIV void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
6dcb9723 BV	377	{
	378	struct dev_context *devc;
	379	struct sr_dev_inst *sdi;
	380	int ret;
	381
	382	sdi = transfer->user_data;
	383	devc = sdi->priv;
	384	if (transfer == devc->out_transfer)
	385	/* Just the command acknowledgement. */
	386	return;
	387
	388	if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
	389	/* USB device was unplugged. */
	390	dev_acquisition_stop(sdi, devc->cb_data);
	391	} else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
	392	/* First two bytes in any transfer are FTDI status bytes. */
	393	if (transfer->actual_length > 2)
	394	receive_data(sdi, transfer->buffer + 2, transfer->actual_length - 2);
	395	}
	396	/* Anything else is either an error or a timeout, which is fine:
	397	* we were just going to send another transfer request anyway. */
	398
	399	if (sdi->status == SR_ST_ACTIVE) {
	400	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	401	sr_err("Unable to resubmit transfer: %s.",
	402	libusb_error_name(ret));
	403	g_free(transfer->buffer);
	404	libusb_free_transfer(transfer);
	405	dev_acquisition_stop(sdi, devc->cb_data);
	406	}
	407	} else {
	408	/* This was the last transfer we're going to receive, so
	409	* clean up now. */
	410	g_free(transfer->buffer);
	411	libusb_free_transfer(transfer);
	412	}
	413	}
	414
	415	static int handle_events(int fd, int revents, void *cb_data)
	416	{
4f840ce9	417	struct sr_dev_driver *di;
6dcb9723	418	struct dev_context *devc;
4f840ce9	419	struct drv_context *drvc;
6dcb9723 BV	420	struct sr_datafeed_packet packet;
	421	struct sr_dev_inst *sdi;
	422	struct timeval tv;
	423	gint64 now;
	424
	425	(void)fd;
	426	(void)revents;
	427
	428	sdi = cb_data;
	429	devc = sdi->priv;
4f840ce9	430	di = sdi->driver;
41812aca	431	drvc = di->context;
6dcb9723 BV	432
	433	if (devc->limit_msec) {
	434	now = g_get_monotonic_time() / 1000;
	435	if (now > devc->end_time)
	436	dev_acquisition_stop(sdi, devc->cb_data);
	437	}
	438
	439	if (sdi->status == SR_ST_STOPPING) {
102f1239	440	usb_source_remove(sdi->session, drvc->sr_ctx);
6dcb9723 BV	441
	442	dev_close(sdi);
	443
	444	packet.type = SR_DF_END;
	445	sr_session_send(sdi, &packet);
	446	}
	447
	448	memset(&tv, 0, sizeof(struct timeval));
	449	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
	450	NULL);
	451
	452	return TRUE;
	453	}
	454
	455	static int dev_acquisition_start(const struct sr_dev_inst sdi, void cb_data)
	456	{
4f840ce9	457	struct sr_dev_driver *di = sdi->driver;
6dcb9723 BV	458	struct drv_context *drvc;
	459	struct dev_context *devc;
	460	struct sr_usb_dev_inst *usb;
	461	struct libusb_transfer *transfer;
	462	int ret;
	463	unsigned char *buf;
0acdd793	464
41812aca	465	drvc = di->context;
0acdd793 BV	466	if (sdi->status != SR_ST_ACTIVE)
	467	return SR_ERR_DEV_CLOSED;
	468
41812aca	469	if (!di->context) {
6dcb9723 BV	470	sr_err("Driver was not initialized.");
	471	return SR_ERR;
	472	}
	473
	474	devc = sdi->priv;
	475	usb = sdi->conn;
	476	devc->cb_data = cb_data;
	477	devc->end_time = 0;
	478	devc->num_samples = 0;
	479	devc->reply_size = 0;
	480
	481	/* Send header packet to the session bus. */
	482	std_session_send_df_header(cb_data, LOG_PREFIX);
	483
102f1239 BV	484	usb_source_add(sdi->session, drvc->sr_ctx, 100,
102f1239 BV	485	handle_events, (void *)sdi);
6dcb9723 BV	486
	487	if (testo_set_serial_params(usb) != SR_OK)
	488	return SR_ERR;
	489
	490	devc->out_transfer = libusb_alloc_transfer(0);
	491	if (testo_request_packet(sdi) != SR_OK)
	492	return SR_ERR;
	493
a95f142e	494	buf = g_malloc(MAX_REPLY_SIZE);
6dcb9723 BV	495	transfer = libusb_alloc_transfer(0);
	496	libusb_fill_bulk_transfer(transfer, usb->devhdl, EP_IN, buf,
	497	MAX_REPLY_SIZE, receive_transfer, (void *)sdi, 100);
	498	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	499	sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
	500	libusb_free_transfer(transfer);
	501	g_free(buf);
	502	return SR_ERR;
	503	}
	504	devc->reply_size = 0;
0acdd793 BV	505
	506	return SR_OK;
	507	}
	508
	509	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	510	{
4f840ce9	511	struct sr_dev_driver *di = sdi->driver;
0acdd793 BV	512	(void)cb_data;
0acdd793 BV	513
41812aca	514	if (!di->context) {
6dcb9723 BV	515	sr_err("Driver was not initialized.");
	516	return SR_ERR;
	517	}
	518
0acdd793 BV	519	if (sdi->status != SR_ST_ACTIVE)
	520	return SR_ERR_DEV_CLOSED;
	521
6dcb9723	522	sdi->status = SR_ST_STOPPING;
0acdd793 BV	523
	524	return SR_OK;
	525	}
	526
	527	SR_PRIV struct sr_dev_driver testo_driver_info = {
	528	.name = "testo",
	529	.longname = "Testo",
	530	.api_version = 1,
	531	.init = init,
	532	.cleanup = cleanup,
	533	.scan = scan,
	534	.dev_list = dev_list,
	535	.dev_clear = dev_clear,
	536	.config_get = config_get,
	537	.config_set = config_set,
	538	.config_list = config_list,
	539	.dev_open = dev_open,
	540	.dev_close = dev_close,
	541	.dev_acquisition_start = dev_acquisition_start,
	542	.dev_acquisition_stop = dev_acquisition_stop,
41812aca	543	.context = NULL,
0acdd793	544	};