[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,
};

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_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;
		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 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_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)
{
	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	};
	38
	39	unsigned char TESTO_x35_REQUEST[] = { 0x12, 0, 0, 0, 1, 1, 0x55, 0xd1, 0xb7 };
	40	struct testo_model models[] = {
	41	{ "435", 9, TESTO_x35_REQUEST },
	42	};
0acdd793	43
4f840ce9	44	static int init(struct sr_dev_driver di, struct sr_context sr_ctx)
0acdd793 BV	45	{
	46	return std_init(sr_ctx, di, LOG_PREFIX);
	47	}
	48
4f840ce9	49	static GSList scan(struct sr_dev_driver di, GSList *options)
0acdd793 BV	50	{
0acdd793 BV	51	struct drv_context *drvc;
6dcb9723 BV	52	struct dev_context *devc;
	53	struct sr_config *src;
	54	struct sr_dev_inst *sdi;
	55	struct sr_usb_dev_inst *usb;
	56	struct libusb_device_descriptor des;
	57	libusb_device **devlist;
	58	struct libusb_device_handle *hdl;
	59	GSList conn_devices, devices, *l;
bde9fbd1	60	int ret, i;
6dcb9723	61	const char *str;
bde9fbd1	62	char manufacturer[64], product[64], connection_id[64];
0acdd793 BV	63
	64	devices = NULL;
	65	drvc = di->priv;
	66	drvc->instances = NULL;
	67
6dcb9723 BV	68	conn_devices = NULL;
	69	for (l = options; l; l = l->next) {
	70	src = l->data;
	71	if (src->key != SR_CONF_CONN)
	72	continue;
	73	str = g_variant_get_string(src->data, NULL);
	74	conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, str);
	75	}
	76
	77	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
	78	for (i = 0; devlist[i]; i++) {
	79	if (conn_devices) {
	80	usb = NULL;
	81	for (l = conn_devices; l; l = l->next) {
	82	usb = l->data;
	83	if (usb->bus == libusb_get_bus_number(devlist[i])
	84	&& usb->address == libusb_get_device_address(devlist[i]))
	85	break;
	86	}
	87	if (!l)
	88	/* This device matched none of the ones that
	89	* matched the conn specification. */
	90	continue;
	91	}
	92
	93	if ((ret = libusb_get_device_descriptor( devlist[i], &des)) != 0) {
	94	sr_warn("Failed to get device descriptor: %s.",
	95	libusb_error_name(ret));
	96	continue;
	97	}
	98
	99	if ((ret = libusb_open(devlist[i], &hdl)) < 0)
	100	continue;
	101
	102	manufacturer[0] = product[0] = '\0';
	103	if (des.iManufacturer && (ret = libusb_get_string_descriptor_ascii(
	104	hdl, des.iManufacturer, (unsigned char *) manufacturer,
	105	sizeof(manufacturer))) < 0) {
	106	sr_warn("Failed to get manufacturer string descriptor: %s.",
	107	libusb_error_name(ret));
	108	}
	109	if (des.iProduct && (ret = libusb_get_string_descriptor_ascii(
	110	hdl, des.iProduct, (unsigned char *) product,
	111	sizeof(product))) < 0) {
	112	sr_warn("Failed to get product string descriptor: %s.",
	113	libusb_error_name(ret));
	114	}
	115	libusb_close(hdl);
	116
	117	if (strncmp(manufacturer, "testo", 5))
	118	continue;
	119
bde9fbd1 SA	120	usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
bde9fbd1 SA	121
6dcb9723 BV	122	/* Hardcode the 435 for now.*/
	123	if (strcmp(product, "testo 435/635/735"))
	124	continue;
	125
aac29cc1	126	sdi = g_malloc0(sizeof(struct sr_dev_inst));
0af636be UH	127	sdi->status = SR_ST_INACTIVE;
	128	sdi->vendor = g_strdup("Testo");
	129	sdi->model = g_strdup("435/635/735");
6dcb9723 BV	130	sdi->driver = di;
	131	sdi->inst_type = SR_INST_USB;
	132	sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
	133	libusb_get_device_address(devlist[i]), NULL);
bde9fbd1	134	sdi->connection_id = g_strdup(connection_id);
6dcb9723 BV	135	devc = g_malloc(sizeof(struct dev_context));
	136	devc->model = &models[0];
	137	devc->limit_msec = 0;
	138	devc->limit_samples = 0;
	139	sdi->priv = devc;
	140	if (testo_probe_channels(sdi) != SR_OK)
	141	continue;
	142	drvc->instances = g_slist_append(drvc->instances, sdi);
	143	devices = g_slist_append(devices, sdi);
	144	}
	145	libusb_free_device_list(devlist, 1);
	146	g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
0acdd793 BV	147
	148	return devices;
	149	}
	150
4f840ce9	151	static GSList dev_list(const struct sr_dev_driver di)
0acdd793 BV	152	{
	153	return ((struct drv_context *)(di->priv))->instances;
	154	}
	155
4f840ce9	156	static int dev_clear(const struct sr_dev_driver *di)
0acdd793 BV	157	{
	158	return std_dev_clear(di, NULL);
	159	}
	160
	161	static int dev_open(struct sr_dev_inst *sdi)
	162	{
4f840ce9	163	struct sr_dev_driver *di = sdi->driver;
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	{
4f840ce9	214	struct sr_dev_driver *di = sdi->driver;
6dcb9723 BV	215	struct sr_usb_dev_inst *usb;
	216
	217	if (!di->priv) {
	218	sr_err("Driver was not initialized.");
	219	return SR_ERR;
	220	}
0acdd793	221
6dcb9723 BV	222	usb = sdi->conn;
	223	if (!usb->devhdl)
	224	/* Nothing to do. */
	225	return SR_OK;
0acdd793	226
6dcb9723 BV	227	libusb_release_interface(usb->devhdl, 0);
	228	libusb_close(usb->devhdl);
	229	usb->devhdl = NULL;
0acdd793 BV	230	sdi->status = SR_ST_INACTIVE;
	231
	232	return SR_OK;
	233	}
	234
4f840ce9	235	static int cleanup(const struct sr_dev_driver *di)
0acdd793	236	{
6dcb9723 BV	237	int ret;
6dcb9723 BV	238	struct drv_context *drvc;
0acdd793	239
6dcb9723 BV	240	if (!(drvc = di->priv))
6dcb9723 BV	241	return SR_OK;
0acdd793	242
4f840ce9	243	ret = dev_clear(di);
6dcb9723	244	g_free(drvc);
6dcb9723 BV	245
6dcb9723 BV	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	{
4f840ce9	275	struct sr_dev_driver *di = sdi->driver;
6dcb9723 BV	276	struct dev_context *devc;
6dcb9723 BV	277	gint64 now;
0acdd793 BV	278	int ret;
0acdd793 BV	279
0acdd793 BV	280	(void)cg;
	281
	282	if (sdi->status != SR_ST_ACTIVE)
	283	return SR_ERR_DEV_CLOSED;
	284
6dcb9723 BV	285	if (!di->priv) {
	286	sr_err("Driver was not initialized.");
	287	return SR_ERR;
	288	}
	289
	290	devc = sdi->priv;
0acdd793 BV	291	ret = SR_OK;
0acdd793 BV	292	switch (key) {
6dcb9723 BV	293	case SR_CONF_LIMIT_MSEC:
	294	devc->limit_msec = g_variant_get_uint64(data);
	295	now = g_get_monotonic_time() / 1000;
	296	devc->end_time = now + devc->limit_msec;
	297	sr_dbg("Setting time limit to %" PRIu64 "ms.",
	298	devc->limit_msec);
	299	break;
	300	case SR_CONF_LIMIT_SAMPLES:
	301	devc->limit_samples = g_variant_get_uint64(data);
	302	sr_dbg("Setting sample limit to %" PRIu64 ".",
	303	devc->limit_samples);
	304	break;
0acdd793 BV	305	default:
	306	ret = SR_ERR_NA;
	307	}
	308
	309	return ret;
	310	}
	311
584560f1	312	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
0acdd793 BV	313	const struct sr_channel_group *cg)
0acdd793 BV	314	{
0acdd793	315	(void)sdi;
0acdd793 BV	316	(void)cg;
0acdd793 BV	317
0acdd793	318	switch (key) {
6dcb9723	319	case SR_CONF_SCAN_OPTIONS:
584560f1 BV	320	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	321	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
6dcb9723 BV	322	break;
6dcb9723 BV	323	case SR_CONF_DEVICE_OPTIONS:
584560f1 BV	324	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	325	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
6dcb9723	326	break;
0acdd793 BV	327	default:
	328	return SR_ERR_NA;
	329	}
	330
6dcb9723	331	return SR_OK;
0acdd793 BV	332	}
0acdd793 BV	333
6dcb9723	334	static void receive_data(struct sr_dev_inst sdi, unsigned char data, int len)
0acdd793	335	{
6dcb9723 BV	336	struct dev_context *devc;
6dcb9723 BV	337	int packet_size;
87895640	338	uint16_t crc;
6dcb9723 BV	339
	340	devc = sdi->priv;
	341
	342	if (devc->reply_size + len > MAX_REPLY_SIZE) {
	343	/* Something went very wrong. */
	344	sr_dbg("Receive buffer overrun.");
	345	devc->reply_size = 0;
	346	return;
	347	}
	348
	349	memcpy(devc->reply + devc->reply_size, data, len);
	350	devc->reply_size += len;
	351	/* Sixth byte contains the length of the packet. */
87895640 BV	352	if (devc->reply_size < 7)
	353	return;
	354
	355	packet_size = 7 + devc->reply[6] * 7 + 2;
	356	if (devc->reply_size < packet_size)
	357	return;
	358
	359	if (!testo_check_packet_prefix(devc->reply, devc->reply_size))
	360	return;
	361
	362	crc = crc16_mcrf4xx(0xffff, devc->reply, devc->reply_size - 2);
88b1d4e5	363	if (crc == RL16(&devc->reply[devc->reply_size - 2])) {
87895640 BV	364	testo_receive_packet(sdi);
	365	devc->num_samples++;
	366	} else {
	367	sr_dbg("Packet has invalid CRC.");
6dcb9723 BV	368	}
6dcb9723 BV	369
87895640 BV	370	devc->reply_size = 0;
	371	if (devc->limit_samples && devc->num_samples >= devc->limit_samples)
	372	dev_acquisition_stop(sdi, devc->cb_data);
	373	else
	374	testo_request_packet(sdi);
	375
6dcb9723 BV	376	}
	377
	378	SR_PRIV void receive_transfer(struct libusb_transfer *transfer)
	379	{
	380	struct dev_context *devc;
	381	struct sr_dev_inst *sdi;
	382	int ret;
	383
	384	sdi = transfer->user_data;
	385	devc = sdi->priv;
	386	if (transfer == devc->out_transfer)
	387	/* Just the command acknowledgement. */
	388	return;
	389
	390	if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
	391	/* USB device was unplugged. */
	392	dev_acquisition_stop(sdi, devc->cb_data);
	393	} else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
	394	/* First two bytes in any transfer are FTDI status bytes. */
	395	if (transfer->actual_length > 2)
	396	receive_data(sdi, transfer->buffer + 2, transfer->actual_length - 2);
	397	}
	398	/* Anything else is either an error or a timeout, which is fine:
	399	* we were just going to send another transfer request anyway. */
	400
	401	if (sdi->status == SR_ST_ACTIVE) {
	402	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	403	sr_err("Unable to resubmit transfer: %s.",
	404	libusb_error_name(ret));
	405	g_free(transfer->buffer);
	406	libusb_free_transfer(transfer);
	407	dev_acquisition_stop(sdi, devc->cb_data);
	408	}
	409	} else {
	410	/* This was the last transfer we're going to receive, so
	411	* clean up now. */
	412	g_free(transfer->buffer);
	413	libusb_free_transfer(transfer);
	414	}
	415	}
	416
	417	static int handle_events(int fd, int revents, void *cb_data)
	418	{
4f840ce9	419	struct sr_dev_driver *di;
6dcb9723	420	struct dev_context *devc;
4f840ce9	421	struct drv_context *drvc;
6dcb9723 BV	422	struct sr_datafeed_packet packet;
	423	struct sr_dev_inst *sdi;
	424	struct timeval tv;
	425	gint64 now;
	426
	427	(void)fd;
	428	(void)revents;
	429
	430	sdi = cb_data;
	431	devc = sdi->priv;
4f840ce9 ML	432	di = sdi->driver;
4f840ce9 ML	433	drvc = di->priv;
6dcb9723 BV	434
	435	if (devc->limit_msec) {
	436	now = g_get_monotonic_time() / 1000;
	437	if (now > devc->end_time)
	438	dev_acquisition_stop(sdi, devc->cb_data);
	439	}
	440
	441	if (sdi->status == SR_ST_STOPPING) {
102f1239	442	usb_source_remove(sdi->session, drvc->sr_ctx);
6dcb9723 BV	443
	444	dev_close(sdi);
	445
	446	packet.type = SR_DF_END;
	447	sr_session_send(sdi, &packet);
	448	}
	449
	450	memset(&tv, 0, sizeof(struct timeval));
	451	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
	452	NULL);
	453
	454	return TRUE;
	455	}
	456
	457	static int dev_acquisition_start(const struct sr_dev_inst sdi, void cb_data)
	458	{
4f840ce9	459	struct sr_dev_driver *di = sdi->driver;
6dcb9723 BV	460	struct drv_context *drvc;
	461	struct dev_context *devc;
	462	struct sr_usb_dev_inst *usb;
	463	struct libusb_transfer *transfer;
	464	int ret;
	465	unsigned char *buf;
0acdd793	466
6dcb9723	467	drvc = di->priv;
0acdd793 BV	468	if (sdi->status != SR_ST_ACTIVE)
	469	return SR_ERR_DEV_CLOSED;
	470
6dcb9723 BV	471	if (!di->priv) {
	472	sr_err("Driver was not initialized.");
	473	return SR_ERR;
	474	}
	475
	476	devc = sdi->priv;
	477	usb = sdi->conn;
	478	devc->cb_data = cb_data;
	479	devc->end_time = 0;
	480	devc->num_samples = 0;
	481	devc->reply_size = 0;
	482
	483	/* Send header packet to the session bus. */
	484	std_session_send_df_header(cb_data, LOG_PREFIX);
	485
102f1239 BV	486	usb_source_add(sdi->session, drvc->sr_ctx, 100,
102f1239 BV	487	handle_events, (void *)sdi);
6dcb9723 BV	488
	489	if (testo_set_serial_params(usb) != SR_OK)
	490	return SR_ERR;
	491
	492	devc->out_transfer = libusb_alloc_transfer(0);
	493	if (testo_request_packet(sdi) != SR_OK)
	494	return SR_ERR;
	495
	496	buf = g_try_malloc(MAX_REPLY_SIZE);
	497	transfer = libusb_alloc_transfer(0);
	498	libusb_fill_bulk_transfer(transfer, usb->devhdl, EP_IN, buf,
	499	MAX_REPLY_SIZE, receive_transfer, (void *)sdi, 100);
	500	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	501	sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
	502	libusb_free_transfer(transfer);
	503	g_free(buf);
	504	return SR_ERR;
	505	}
	506	devc->reply_size = 0;
0acdd793 BV	507
	508	return SR_OK;
	509	}
	510
	511	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	512	{
4f840ce9	513	struct sr_dev_driver *di = sdi->driver;
0acdd793 BV	514	(void)cb_data;
0acdd793 BV	515
6dcb9723 BV	516	if (!di->priv) {
	517	sr_err("Driver was not initialized.");
	518	return SR_ERR;
	519	}
	520
0acdd793 BV	521	if (sdi->status != SR_ST_ACTIVE)
	522	return SR_ERR_DEV_CLOSED;
	523
6dcb9723	524	sdi->status = SR_ST_STOPPING;
0acdd793 BV	525
	526	return SR_OK;
	527	}
	528
	529	SR_PRIV struct sr_dev_driver testo_driver_info = {
	530	.name = "testo",
	531	.longname = "Testo",
	532	.api_version = 1,
	533	.init = init,
	534	.cleanup = cleanup,
	535	.scan = scan,
	536	.dev_list = dev_list,
	537	.dev_clear = dev_clear,
	538	.config_get = config_get,
	539	.config_set = config_set,
	540	.config_list = config_list,
	541	.dev_open = dev_open,
	542	.dev_close = dev_close,
	543	.dev_acquisition_start = dev_acquisition_start,
	544	.dev_acquisition_stop = dev_acquisition_stop,
	545	.priv = NULL,
	546	};