[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();
		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(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
0af636be UH	127	sdi = sr_dev_inst_new();
	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
	152	static GSList *dev_list(void)
	153	{
	154	return ((struct drv_context *)(di->priv))->instances;
	155	}
	156
	157	static int dev_clear(void)
	158	{
	159	return std_dev_clear(di, NULL);
	160	}
	161
	162	static int dev_open(struct sr_dev_inst *sdi)
	163	{
6dcb9723 BV	164	struct drv_context *drvc = di->priv;
	165	struct sr_usb_dev_inst *usb;
	166	libusb_device **devlist;
	167	int ret, i;
bde9fbd1	168	char connection_id[64];
6dcb9723 BV	169
	170	if (!di->priv) {
	171	sr_err("Driver was not initialized.");
	172	return SR_ERR;
	173	}
0acdd793	174
6dcb9723 BV	175	usb = sdi->conn;
	176	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
	177	for (i = 0; devlist[i]; i++) {
bde9fbd1 SA	178	usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
bde9fbd1 SA	179	if (strcmp(sdi->connection_id, connection_id))
6dcb9723 BV	180	continue;
	181	if ((ret = libusb_open(devlist[i], &usb->devhdl))) {
	182	sr_err("Failed to open device: %s.", libusb_error_name(ret));
	183	return SR_ERR;
	184	}
	185	break;
	186	}
	187	libusb_free_device_list(devlist, 1);
	188	if (!devlist[i]) {
	189	sr_err("Device not found.");
	190	return SR_ERR;
	191	}
0acdd793	192
88b1d4e5 BV	193	if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) {
	194	if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
	195	if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
	196	sr_err("Failed to detach kernel driver: %s.",
	197	libusb_error_name(ret));
	198	return SR_ERR;
	199	}
	200	}
	201	}
	202
6dcb9723 BV	203	if ((ret = libusb_claim_interface(usb->devhdl, 0))) {
	204	sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
	205	return SR_ERR;
	206	}
0acdd793 BV	207	sdi->status = SR_ST_ACTIVE;
	208
	209	return SR_OK;
	210	}
	211
	212	static int dev_close(struct sr_dev_inst *sdi)
	213	{
6dcb9723 BV	214	struct sr_usb_dev_inst *usb;
	215
	216	if (!di->priv) {
	217	sr_err("Driver was not initialized.");
	218	return SR_ERR;
	219	}
0acdd793	220
6dcb9723 BV	221	usb = sdi->conn;
	222	if (!usb->devhdl)
	223	/* Nothing to do. */
	224	return SR_OK;
0acdd793	225
6dcb9723 BV	226	libusb_release_interface(usb->devhdl, 0);
	227	libusb_close(usb->devhdl);
	228	usb->devhdl = NULL;
0acdd793 BV	229	sdi->status = SR_ST_INACTIVE;
	230
	231	return SR_OK;
	232	}
	233
	234	static int cleanup(void)
	235	{
6dcb9723 BV	236	int ret;
6dcb9723 BV	237	struct drv_context *drvc;
0acdd793	238
6dcb9723 BV	239	if (!(drvc = di->priv))
6dcb9723 BV	240	return SR_OK;
0acdd793	241
6dcb9723 BV	242	ret = dev_clear();
	243	g_free(drvc);
	244	di->priv = NULL;
	245
	246	return ret;
0acdd793 BV	247	}
0acdd793 BV	248
584560f1	249	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
0acdd793 BV	250	const struct sr_channel_group *cg)
0acdd793 BV	251	{
6dcb9723 BV	252	struct sr_usb_dev_inst *usb;
6dcb9723 BV	253	char str[128];
0acdd793	254
0acdd793 BV	255	(void)cg;
0acdd793 BV	256
0acdd793	257	switch (key) {
6dcb9723 BV	258	case SR_CONF_CONN:
	259	if (!sdi \|\| !sdi->conn)
	260	return SR_ERR_ARG;
	261	usb = sdi->conn;
	262	snprintf(str, 128, "%d.%d", usb->bus, usb->address);
	263	*data = g_variant_new_string(str);
	264	break;
0acdd793 BV	265	default:
	266	return SR_ERR_NA;
	267	}
	268
6dcb9723	269	return SR_OK;
0acdd793 BV	270	}
0acdd793 BV	271
584560f1	272	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
0acdd793 BV	273	const struct sr_channel_group *cg)
0acdd793 BV	274	{
6dcb9723 BV	275	struct dev_context *devc;
6dcb9723 BV	276	gint64 now;
0acdd793 BV	277	int ret;
0acdd793 BV	278
0acdd793 BV	279	(void)cg;
	280
	281	if (sdi->status != SR_ST_ACTIVE)
	282	return SR_ERR_DEV_CLOSED;
	283
6dcb9723 BV	284	if (!di->priv) {
	285	sr_err("Driver was not initialized.");
	286	return SR_ERR;
	287	}
	288
	289	devc = sdi->priv;
0acdd793 BV	290	ret = SR_OK;
0acdd793 BV	291	switch (key) {
6dcb9723 BV	292	case SR_CONF_LIMIT_MSEC:
	293	devc->limit_msec = g_variant_get_uint64(data);
	294	now = g_get_monotonic_time() / 1000;
	295	devc->end_time = now + devc->limit_msec;
	296	sr_dbg("Setting time limit to %" PRIu64 "ms.",
	297	devc->limit_msec);
	298	break;
	299	case SR_CONF_LIMIT_SAMPLES:
	300	devc->limit_samples = g_variant_get_uint64(data);
	301	sr_dbg("Setting sample limit to %" PRIu64 ".",
	302	devc->limit_samples);
	303	break;
0acdd793 BV	304	default:
	305	ret = SR_ERR_NA;
	306	}
	307
	308	return ret;
	309	}
	310
584560f1	311	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
0acdd793 BV	312	const struct sr_channel_group *cg)
0acdd793 BV	313	{
0acdd793	314	(void)sdi;
0acdd793 BV	315	(void)cg;
0acdd793 BV	316
0acdd793	317	switch (key) {
6dcb9723	318	case SR_CONF_SCAN_OPTIONS:
584560f1 BV	319	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	320	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
6dcb9723 BV	321	break;
6dcb9723 BV	322	case SR_CONF_DEVICE_OPTIONS:
584560f1 BV	323	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	324	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
6dcb9723	325	break;
0acdd793 BV	326	default:
	327	return SR_ERR_NA;
	328	}
	329
6dcb9723	330	return SR_OK;
0acdd793 BV	331	}
0acdd793 BV	332
6dcb9723	333	static void receive_data(struct sr_dev_inst sdi, unsigned char data, int len)
0acdd793	334	{
6dcb9723 BV	335	struct dev_context *devc;
6dcb9723 BV	336	int packet_size;
87895640	337	uint16_t crc;
6dcb9723 BV	338
	339	devc = sdi->priv;
	340
	341	if (devc->reply_size + len > MAX_REPLY_SIZE) {
	342	/* Something went very wrong. */
	343	sr_dbg("Receive buffer overrun.");
	344	devc->reply_size = 0;
	345	return;
	346	}
	347
	348	memcpy(devc->reply + devc->reply_size, data, len);
	349	devc->reply_size += len;
	350	/* Sixth byte contains the length of the packet. */
87895640 BV	351	if (devc->reply_size < 7)
	352	return;
	353
	354	packet_size = 7 + devc->reply[6] * 7 + 2;
	355	if (devc->reply_size < packet_size)
	356	return;
	357
	358	if (!testo_check_packet_prefix(devc->reply, devc->reply_size))
	359	return;
	360
	361	crc = crc16_mcrf4xx(0xffff, devc->reply, devc->reply_size - 2);
88b1d4e5	362	if (crc == RL16(&devc->reply[devc->reply_size - 2])) {
87895640 BV	363	testo_receive_packet(sdi);
	364	devc->num_samples++;
	365	} else {
	366	sr_dbg("Packet has invalid CRC.");
6dcb9723 BV	367	}
6dcb9723 BV	368
87895640 BV	369	devc->reply_size = 0;
	370	if (devc->limit_samples && devc->num_samples >= devc->limit_samples)
	371	dev_acquisition_stop(sdi, devc->cb_data);
	372	else
	373	testo_request_packet(sdi);
	374
6dcb9723 BV	375	}
	376
	377	SR_PRIV void receive_transfer(struct libusb_transfer *transfer)
	378	{
	379	struct dev_context *devc;
	380	struct sr_dev_inst *sdi;
	381	int ret;
	382
	383	sdi = transfer->user_data;
	384	devc = sdi->priv;
	385	if (transfer == devc->out_transfer)
	386	/* Just the command acknowledgement. */
	387	return;
	388
	389	if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
	390	/* USB device was unplugged. */
	391	dev_acquisition_stop(sdi, devc->cb_data);
	392	} else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
	393	/* First two bytes in any transfer are FTDI status bytes. */
	394	if (transfer->actual_length > 2)
	395	receive_data(sdi, transfer->buffer + 2, transfer->actual_length - 2);
	396	}
	397	/* Anything else is either an error or a timeout, which is fine:
	398	* we were just going to send another transfer request anyway. */
	399
	400	if (sdi->status == SR_ST_ACTIVE) {
	401	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	402	sr_err("Unable to resubmit transfer: %s.",
	403	libusb_error_name(ret));
	404	g_free(transfer->buffer);
	405	libusb_free_transfer(transfer);
	406	dev_acquisition_stop(sdi, devc->cb_data);
	407	}
	408	} else {
	409	/* This was the last transfer we're going to receive, so
	410	* clean up now. */
	411	g_free(transfer->buffer);
	412	libusb_free_transfer(transfer);
	413	}
	414	}
	415
	416	static int handle_events(int fd, int revents, void *cb_data)
	417	{
	418	struct dev_context *devc;
	419	struct drv_context *drvc = di->priv;
	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;
	430
	431	if (devc->limit_msec) {
	432	now = g_get_monotonic_time() / 1000;
	433	if (now > devc->end_time)
	434	dev_acquisition_stop(sdi, devc->cb_data);
	435	}
	436
	437	if (sdi->status == SR_ST_STOPPING) {
102f1239	438	usb_source_remove(sdi->session, drvc->sr_ctx);
6dcb9723 BV	439
	440	dev_close(sdi);
	441
	442	packet.type = SR_DF_END;
	443	sr_session_send(sdi, &packet);
	444	}
	445
	446	memset(&tv, 0, sizeof(struct timeval));
	447	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
	448	NULL);
	449
	450	return TRUE;
	451	}
	452
	453	static int dev_acquisition_start(const struct sr_dev_inst sdi, void cb_data)
	454	{
	455	struct drv_context *drvc;
	456	struct dev_context *devc;
	457	struct sr_usb_dev_inst *usb;
	458	struct libusb_transfer *transfer;
	459	int ret;
	460	unsigned char *buf;
0acdd793	461
6dcb9723	462	drvc = di->priv;
0acdd793 BV	463	if (sdi->status != SR_ST_ACTIVE)
	464	return SR_ERR_DEV_CLOSED;
	465
6dcb9723 BV	466	if (!di->priv) {
	467	sr_err("Driver was not initialized.");
	468	return SR_ERR;
	469	}
	470
	471	devc = sdi->priv;
	472	usb = sdi->conn;
	473	devc->cb_data = cb_data;
	474	devc->end_time = 0;
	475	devc->num_samples = 0;
	476	devc->reply_size = 0;
	477
	478	/* Send header packet to the session bus. */
	479	std_session_send_df_header(cb_data, LOG_PREFIX);
	480
102f1239 BV	481	usb_source_add(sdi->session, drvc->sr_ctx, 100,
102f1239 BV	482	handle_events, (void *)sdi);
6dcb9723 BV	483
	484	if (testo_set_serial_params(usb) != SR_OK)
	485	return SR_ERR;
	486
	487	devc->out_transfer = libusb_alloc_transfer(0);
	488	if (testo_request_packet(sdi) != SR_OK)
	489	return SR_ERR;
	490
	491	buf = g_try_malloc(MAX_REPLY_SIZE);
	492	transfer = libusb_alloc_transfer(0);
	493	libusb_fill_bulk_transfer(transfer, usb->devhdl, EP_IN, buf,
	494	MAX_REPLY_SIZE, receive_transfer, (void *)sdi, 100);
	495	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	496	sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
	497	libusb_free_transfer(transfer);
	498	g_free(buf);
	499	return SR_ERR;
	500	}
	501	devc->reply_size = 0;
0acdd793 BV	502
	503	return SR_OK;
	504	}
	505
	506	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	507	{
	508	(void)cb_data;
	509
6dcb9723 BV	510	if (!di->priv) {
	511	sr_err("Driver was not initialized.");
	512	return SR_ERR;
	513	}
	514
0acdd793 BV	515	if (sdi->status != SR_ST_ACTIVE)
	516	return SR_ERR_DEV_CLOSED;
	517
6dcb9723	518	sdi->status = SR_ST_STOPPING;
0acdd793 BV	519
	520	return SR_OK;
	521	}
	522
	523	SR_PRIV struct sr_dev_driver testo_driver_info = {
	524	.name = "testo",
	525	.longname = "Testo",
	526	.api_version = 1,
	527	.init = init,
	528	.cleanup = cleanup,
	529	.scan = scan,
	530	.dev_list = dev_list,
	531	.dev_clear = dev_clear,
	532	.config_get = config_get,
	533	.config_set = config_set,
	534	.config_list = config_list,
	535	.dev_open = dev_open,
	536	.dev_close = dev_close,
	537	.dev_acquisition_start = dev_acquisition_start,
	538	.dev_acquisition_stop = dev_acquisition_stop,
	539	.priv = NULL,
	540	};