[libsigrok.git] / 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 <libserialport.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 int32_t scanopts[] = {
	SR_CONF_CONN,
};

static const int32_t devopts[] = {
	SR_CONF_MULTIMETER,
	SR_CONF_LIMIT_MSEC,
	SR_CONF_LIMIT_SAMPLES,
	SR_CONF_CONTINUOUS,
};

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 devcnt, ret, i;
	const char *str;
	char manufacturer[64], product[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;

		/* Hardcode the 435 for now.*/
		if (strcmp(product, "testo 435/635/735"))
			continue;

		devcnt = g_slist_length(drvc->instances);
		sdi = sr_dev_inst_new(devcnt, SR_ST_INACTIVE, "Testo",
				"435/635/735", NULL);
		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);
		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;

	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++) {
		if (libusb_get_bus_number(devlist[i]) != usb->bus
				|| libusb_get_device_address(devlist[i]) != usb->address)
			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(int 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(int 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(int 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_INT32,
				scanopts, ARRAY_SIZE(scanopts), sizeof(int32_t));
		break;
	case SR_CONF_DEVICE_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
				devopts, ARRAY_SIZE(devopts), sizeof(int32_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(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(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 BV	20	#include <string.h>
6dcb9723 BV	21	#include <libserialport.h>
0acdd793 BV	22	#include "protocol.h"
0acdd793 BV	23
6dcb9723 BV	24	#define SERIALCOMM "115200/8n1"
6dcb9723 BV	25
0acdd793 BV	26	SR_PRIV struct sr_dev_driver testo_driver_info;
0acdd793 BV	27	static struct sr_dev_driver *di = &testo_driver_info;
6dcb9723 BV	28	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data);
	29
	30	static const int32_t scanopts[] = {
	31	SR_CONF_CONN,
	32	};
	33
	34	static const int32_t devopts[] = {
	35	SR_CONF_MULTIMETER,
	36	SR_CONF_LIMIT_MSEC,
	37	SR_CONF_LIMIT_SAMPLES,
	38	SR_CONF_CONTINUOUS,
	39	};
	40
	41	unsigned char TESTO_x35_REQUEST[] = { 0x12, 0, 0, 0, 1, 1, 0x55, 0xd1, 0xb7 };
	42	struct testo_model models[] = {
	43	{ "435", 9, TESTO_x35_REQUEST },
	44	};
0acdd793 BV	45
	46	static int init(struct sr_context *sr_ctx)
	47	{
	48	return std_init(sr_ctx, di, LOG_PREFIX);
	49	}
	50
	51	static GSList scan(GSList options)
	52	{
	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;
	62	int devcnt, ret, i;
	63	const char *str;
	64	char manufacturer[64], product[64];
0acdd793 BV	65
	66	devices = NULL;
	67	drvc = di->priv;
	68	drvc->instances = NULL;
	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
	122	/* Hardcode the 435 for now.*/
	123	if (strcmp(product, "testo 435/635/735"))
	124	continue;
	125
	126	devcnt = g_slist_length(drvc->instances);
	127	sdi = sr_dev_inst_new(devcnt, SR_ST_INACTIVE, "Testo",
	128	"435/635/735", NULL);
	129	sdi->driver = di;
	130	sdi->inst_type = SR_INST_USB;
	131	sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
	132	libusb_get_device_address(devlist[i]), NULL);
	133	devc = g_malloc(sizeof(struct dev_context));
134	devc->model = &models[0];
135	devc->limit_msec = 0;
136	devc->limit_samples = 0;
137	sdi->priv = devc;
138	if (testo_probe_channels(sdi) != SR_OK)
139	continue;
140	drvc->instances = g_slist_append(drvc->instances, sdi);
141	devices = g_slist_append(devices, sdi);
142	}
143	libusb_free_device_list(devlist, 1);
144	g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
0acdd793 BV	145
	146	return devices;
	147	}
	148
	149	static GSList *dev_list(void)
	150	{
	151	return ((struct drv_context *)(di->priv))->instances;
	152	}
	153
	154	static int dev_clear(void)
	155	{
	156	return std_dev_clear(di, NULL);
	157	}
	158
	159	static int dev_open(struct sr_dev_inst *sdi)
	160	{
6dcb9723 BV	161	struct drv_context *drvc = di->priv;
	162	struct sr_usb_dev_inst *usb;
	163	libusb_device **devlist;
	164	int ret, i;
	165
	166	if (!di->priv) {
	167	sr_err("Driver was not initialized.");
	168	return SR_ERR;
	169	}
0acdd793	170
6dcb9723 BV	171	usb = sdi->conn;
	172	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
	173	for (i = 0; devlist[i]; i++) {
	174	if (libusb_get_bus_number(devlist[i]) != usb->bus
	175	\|\| libusb_get_device_address(devlist[i]) != usb->address)
	176	continue;
	177	if ((ret = libusb_open(devlist[i], &usb->devhdl))) {
	178	sr_err("Failed to open device: %s.", libusb_error_name(ret));
	179	return SR_ERR;
	180	}
	181	break;
	182	}
	183	libusb_free_device_list(devlist, 1);
	184	if (!devlist[i]) {
	185	sr_err("Device not found.");
	186	return SR_ERR;
	187	}
0acdd793	188
88b1d4e5 BV	189	if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) {
	190	if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
	191	if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
	192	sr_err("Failed to detach kernel driver: %s.",
	193	libusb_error_name(ret));
	194	return SR_ERR;
	195	}
	196	}
	197	}
	198
6dcb9723 BV	199	if ((ret = libusb_claim_interface(usb->devhdl, 0))) {
	200	sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
	201	return SR_ERR;
	202	}
0acdd793 BV	203	sdi->status = SR_ST_ACTIVE;
	204
	205	return SR_OK;
	206	}
	207
	208	static int dev_close(struct sr_dev_inst *sdi)
	209	{
6dcb9723 BV	210	struct sr_usb_dev_inst *usb;
	211
	212	if (!di->priv) {
	213	sr_err("Driver was not initialized.");
	214	return SR_ERR;
	215	}
0acdd793	216
6dcb9723 BV	217	usb = sdi->conn;
	218	if (!usb->devhdl)
	219	/* Nothing to do. */
	220	return SR_OK;
0acdd793	221
6dcb9723 BV	222	libusb_release_interface(usb->devhdl, 0);
	223	libusb_close(usb->devhdl);
	224	usb->devhdl = NULL;
0acdd793 BV	225	sdi->status = SR_ST_INACTIVE;
	226
	227	return SR_OK;
	228	}
	229
	230	static int cleanup(void)
	231	{
6dcb9723 BV	232	int ret;
6dcb9723 BV	233	struct drv_context *drvc;
0acdd793	234
6dcb9723 BV	235	if (!(drvc = di->priv))
6dcb9723 BV	236	return SR_OK;
0acdd793	237
6dcb9723 BV	238	ret = dev_clear();
	239	g_free(drvc);
	240	di->priv = NULL;
	241
	242	return ret;
0acdd793 BV	243	}
	244
	245	static int config_get(int key, GVariant *data, const struct sr_dev_inst sdi,
	246	const struct sr_channel_group *cg)
	247	{
6dcb9723 BV	248	struct sr_usb_dev_inst *usb;
6dcb9723 BV	249	char str[128];
0acdd793	250
0acdd793 BV	251	(void)cg;
0acdd793 BV	252
0acdd793	253	switch (key) {
6dcb9723 BV	254	case SR_CONF_CONN:
	255	if (!sdi \|\| !sdi->conn)
	256	return SR_ERR_ARG;
	257	usb = sdi->conn;
	258	snprintf(str, 128, "%d.%d", usb->bus, usb->address);
	259	*data = g_variant_new_string(str);
	260	break;
0acdd793 BV	261	default:
	262	return SR_ERR_NA;
	263	}
	264
6dcb9723	265	return SR_OK;
0acdd793 BV	266	}
	267
	268	static int config_set(int key, GVariant data, const struct sr_dev_inst sdi,
	269	const struct sr_channel_group *cg)
	270	{
6dcb9723 BV	271	struct dev_context *devc;
6dcb9723 BV	272	gint64 now;
0acdd793 BV	273	int ret;
0acdd793 BV	274
0acdd793 BV	275	(void)cg;
	276
	277	if (sdi->status != SR_ST_ACTIVE)
	278	return SR_ERR_DEV_CLOSED;
	279
6dcb9723 BV	280	if (!di->priv) {
	281	sr_err("Driver was not initialized.");
	282	return SR_ERR;
	283	}
	284
	285	devc = sdi->priv;
0acdd793 BV	286	ret = SR_OK;
0acdd793 BV	287	switch (key) {
6dcb9723 BV	288	case SR_CONF_LIMIT_MSEC:
	289	devc->limit_msec = g_variant_get_uint64(data);
	290	now = g_get_monotonic_time() / 1000;
	291	devc->end_time = now + devc->limit_msec;
	292	sr_dbg("Setting time limit to %" PRIu64 "ms.",
	293	devc->limit_msec);
	294	break;
	295	case SR_CONF_LIMIT_SAMPLES:
	296	devc->limit_samples = g_variant_get_uint64(data);
	297	sr_dbg("Setting sample limit to %" PRIu64 ".",
	298	devc->limit_samples);
	299	break;
0acdd793 BV	300	default:
	301	ret = SR_ERR_NA;
	302	}
	303
	304	return ret;
	305	}
	306
	307	static int config_list(int key, GVariant *data, const struct sr_dev_inst sdi,
	308	const struct sr_channel_group *cg)
	309	{
0acdd793	310	(void)sdi;
0acdd793 BV	311	(void)cg;
0acdd793 BV	312
0acdd793	313	switch (key) {
6dcb9723 BV	314	case SR_CONF_SCAN_OPTIONS:
	315	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	316	scanopts, ARRAY_SIZE(scanopts), sizeof(int32_t));
	317	break;
	318	case SR_CONF_DEVICE_OPTIONS:
	319	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	320	devopts, ARRAY_SIZE(devopts), sizeof(int32_t));
	321	break;
0acdd793 BV	322	default:
	323	return SR_ERR_NA;
	324	}
	325
6dcb9723	326	return SR_OK;
0acdd793 BV	327	}
0acdd793 BV	328
6dcb9723	329	static void receive_data(struct sr_dev_inst sdi, unsigned char data, int len)
0acdd793	330	{
6dcb9723 BV	331	struct dev_context *devc;
6dcb9723 BV	332	int packet_size;
87895640	333	uint16_t crc;
6dcb9723 BV	334
	335	devc = sdi->priv;
	336
	337	if (devc->reply_size + len > MAX_REPLY_SIZE) {
	338	/* Something went very wrong. */
	339	sr_dbg("Receive buffer overrun.");
	340	devc->reply_size = 0;
	341	return;
	342	}
	343
	344	memcpy(devc->reply + devc->reply_size, data, len);
	345	devc->reply_size += len;
	346	/* Sixth byte contains the length of the packet. */
87895640 BV	347	if (devc->reply_size < 7)
	348	return;
	349
	350	packet_size = 7 + devc->reply[6] * 7 + 2;
	351	if (devc->reply_size < packet_size)
	352	return;
	353
	354	if (!testo_check_packet_prefix(devc->reply, devc->reply_size))
	355	return;
	356
	357	crc = crc16_mcrf4xx(0xffff, devc->reply, devc->reply_size - 2);
88b1d4e5	358	if (crc == RL16(&devc->reply[devc->reply_size - 2])) {
87895640 BV	359	testo_receive_packet(sdi);
	360	devc->num_samples++;
	361	} else {
	362	sr_dbg("Packet has invalid CRC.");
6dcb9723 BV	363	}
6dcb9723 BV	364
87895640 BV	365	devc->reply_size = 0;
	366	if (devc->limit_samples && devc->num_samples >= devc->limit_samples)
	367	dev_acquisition_stop(sdi, devc->cb_data);
	368	else
	369	testo_request_packet(sdi);
	370
6dcb9723 BV	371	}
	372
	373	SR_PRIV void receive_transfer(struct libusb_transfer *transfer)
	374	{
	375	struct dev_context *devc;
	376	struct sr_dev_inst *sdi;
	377	int ret;
	378
	379	sdi = transfer->user_data;
	380	devc = sdi->priv;
	381	if (transfer == devc->out_transfer)
	382	/* Just the command acknowledgement. */
	383	return;
	384
	385	if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
	386	/* USB device was unplugged. */
	387	dev_acquisition_stop(sdi, devc->cb_data);
	388	} else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
	389	/* First two bytes in any transfer are FTDI status bytes. */
	390	if (transfer->actual_length > 2)
	391	receive_data(sdi, transfer->buffer + 2, transfer->actual_length - 2);
	392	}
	393	/* Anything else is either an error or a timeout, which is fine:
	394	* we were just going to send another transfer request anyway. */
	395
	396	if (sdi->status == SR_ST_ACTIVE) {
	397	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	398	sr_err("Unable to resubmit transfer: %s.",
	399	libusb_error_name(ret));
	400	g_free(transfer->buffer);
	401	libusb_free_transfer(transfer);
	402	dev_acquisition_stop(sdi, devc->cb_data);
	403	}
	404	} else {
	405	/* This was the last transfer we're going to receive, so
	406	* clean up now. */
	407	g_free(transfer->buffer);
	408	libusb_free_transfer(transfer);
	409	}
	410	}
	411
	412	static int handle_events(int fd, int revents, void *cb_data)
	413	{
	414	struct dev_context *devc;
	415	struct drv_context *drvc = di->priv;
	416	struct sr_datafeed_packet packet;
	417	struct sr_dev_inst *sdi;
	418	struct timeval tv;
	419	gint64 now;
	420
	421	(void)fd;
	422	(void)revents;
	423
	424	sdi = cb_data;
	425	devc = sdi->priv;
	426
	427	if (devc->limit_msec) {
	428	now = g_get_monotonic_time() / 1000;
	429	if (now > devc->end_time)
	430	dev_acquisition_stop(sdi, devc->cb_data);
	431	}
	432
	433	if (sdi->status == SR_ST_STOPPING) {
	434	usb_source_remove(drvc->sr_ctx);
435
436	dev_close(sdi);
437
438	packet.type = SR_DF_END;
439	sr_session_send(sdi, &packet);
440	}
441
442	memset(&tv, 0, sizeof(struct timeval));
443	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
444	NULL);
445
446	return TRUE;
447	}
448
449	static int dev_acquisition_start(const struct sr_dev_inst sdi, void cb_data)
450	{
451	struct drv_context *drvc;
452	struct dev_context *devc;
453	struct sr_usb_dev_inst *usb;
454	struct libusb_transfer *transfer;
455	int ret;
456	unsigned char *buf;
0acdd793	457
6dcb9723	458	drvc = di->priv;
0acdd793 BV	459	if (sdi->status != SR_ST_ACTIVE)
	460	return SR_ERR_DEV_CLOSED;
	461
6dcb9723 BV	462	if (!di->priv) {
	463	sr_err("Driver was not initialized.");
	464	return SR_ERR;
	465	}
	466
	467	devc = sdi->priv;
	468	usb = sdi->conn;
	469	devc->cb_data = cb_data;
	470	devc->end_time = 0;
	471	devc->num_samples = 0;
	472	devc->reply_size = 0;
	473
	474	/* Send header packet to the session bus. */
	475	std_session_send_df_header(cb_data, LOG_PREFIX);
	476
	477	usb_source_add(drvc->sr_ctx, 100, handle_events, (void *)sdi);
	478
	479	if (testo_set_serial_params(usb) != SR_OK)
	480	return SR_ERR;
	481
	482	devc->out_transfer = libusb_alloc_transfer(0);
	483	if (testo_request_packet(sdi) != SR_OK)
	484	return SR_ERR;
	485
	486	buf = g_try_malloc(MAX_REPLY_SIZE);
	487	transfer = libusb_alloc_transfer(0);
	488	libusb_fill_bulk_transfer(transfer, usb->devhdl, EP_IN, buf,
	489	MAX_REPLY_SIZE, receive_transfer, (void *)sdi, 100);
	490	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	491	sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
	492	libusb_free_transfer(transfer);
	493	g_free(buf);
	494	return SR_ERR;
	495	}
	496	devc->reply_size = 0;
0acdd793 BV	497
	498	return SR_OK;
	499	}
	500
	501	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	502	{
	503	(void)cb_data;
	504
6dcb9723 BV	505	if (!di->priv) {
	506	sr_err("Driver was not initialized.");
	507	return SR_ERR;
	508	}
	509
0acdd793 BV	510	if (sdi->status != SR_ST_ACTIVE)
	511	return SR_ERR_DEV_CLOSED;
	512
6dcb9723	513	sdi->status = SR_ST_STOPPING;
0acdd793 BV	514
	515	return SR_OK;
	516	}
	517
	518	SR_PRIV struct sr_dev_driver testo_driver_info = {
	519	.name = "testo",
	520	.longname = "Testo",
	521	.api_version = 1,
	522	.init = init,
	523	.cleanup = cleanup,
	524	.scan = scan,
	525	.dev_list = dev_list,
	526	.dev_clear = dev_clear,
	527	.config_get = config_get,
	528	.config_set = config_set,
	529	.config_list = config_list,
	530	.dev_open = dev_open,
	531	.dev_close = dev_close,
	532	.dev_acquisition_start = dev_acquisition_start,
	533	.dev_acquisition_stop = dev_acquisition_stop,
	534	.priv = NULL,
	535	};