[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);

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_GET,
	SR_CONF_LIMIT_MSEC | SR_CONF_SET | SR_CONF_GET,
};

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;
		}

		libusb_get_device_descriptor(devlist[i], &des);

		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];
		sr_sw_limits_init(&devc->sw_limits);
		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 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];

	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;

	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 config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct dev_context *devc = sdi->priv;
	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;
	case SR_CONF_LIMIT_MSEC:
	case SR_CONF_LIMIT_SAMPLES:
		return sr_sw_limits_config_get(&devc->sw_limits, key, data);
	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 = sdi->priv;

	(void)cg;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	return sr_sw_limits_config_set(&devc->sw_limits, key, data);
}

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);
		sr_sw_limits_update_samples_read(&devc->sw_limits, 1);
	} else {
		sr_dbg("Packet has invalid CRC.");
	}

	devc->reply_size = 0;
	if (sr_sw_limits_check(&devc->sw_limits))
		dev_acquisition_stop(sdi);
	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);
	} 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);
		}
	} 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_dev_inst *sdi;
	struct timeval tv;

	(void)fd;
	(void)revents;

	sdi = cb_data;
	devc = sdi->priv;
	di = sdi->driver;
	drvc = di->context;

	if (sr_sw_limits_check(&devc->sw_limits))
		dev_acquisition_stop(sdi);

	if (sdi->status == SR_ST_STOPPING) {
		usb_source_remove(sdi->session, drvc->sr_ctx);
		dev_close(sdi);
		std_session_send_df_end(sdi, LOG_PREFIX);
	}

	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)
{
	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;


	devc = sdi->priv;
	usb = sdi->conn;
	devc->reply_size = 0;

	std_session_send_df_header(sdi, 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;

	sr_sw_limits_acquisition_start(&devc->sw_limits);

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
	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 = std_cleanup,
	.scan = scan,
	.dev_list = std_dev_list,
	.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;
695dc859	27	static int dev_acquisition_stop(struct sr_dev_inst *sdi);
6dcb9723	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,
91b77e6b LPC	36	SR_CONF_LIMIT_SAMPLES \| SR_CONF_SET \| SR_CONF_GET,
91b77e6b LPC	37	SR_CONF_LIMIT_MSEC \| SR_CONF_SET \| SR_CONF_GET,
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
2a8f2d41	95	libusb_get_device_descriptor(devlist[i], &des);
6dcb9723 BV	96
	97	if ((ret = libusb_open(devlist[i], &hdl)) < 0)
	98	continue;
	99
	100	manufacturer[0] = product[0] = '\0';
	101	if (des.iManufacturer && (ret = libusb_get_string_descriptor_ascii(
	102	hdl, des.iManufacturer, (unsigned char *) manufacturer,
	103	sizeof(manufacturer))) < 0) {
	104	sr_warn("Failed to get manufacturer string descriptor: %s.",
	105	libusb_error_name(ret));
	106	}
	107	if (des.iProduct && (ret = libusb_get_string_descriptor_ascii(
	108	hdl, des.iProduct, (unsigned char *) product,
	109	sizeof(product))) < 0) {
	110	sr_warn("Failed to get product string descriptor: %s.",
	111	libusb_error_name(ret));
	112	}
	113	libusb_close(hdl);
	114
	115	if (strncmp(manufacturer, "testo", 5))
	116	continue;
	117
bde9fbd1 SA	118	usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
bde9fbd1 SA	119
6dcb9723 BV	120	/* Hardcode the 435 for now.*/
	121	if (strcmp(product, "testo 435/635/735"))
	122	continue;
	123
aac29cc1	124	sdi = g_malloc0(sizeof(struct sr_dev_inst));
0af636be UH	125	sdi->status = SR_ST_INACTIVE;
	126	sdi->vendor = g_strdup("Testo");
	127	sdi->model = g_strdup("435/635/735");
6dcb9723 BV	128	sdi->driver = di;
	129	sdi->inst_type = SR_INST_USB;
	130	sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
	131	libusb_get_device_address(devlist[i]), NULL);
bde9fbd1	132	sdi->connection_id = g_strdup(connection_id);
6dcb9723 BV	133	devc = g_malloc(sizeof(struct dev_context));
6dcb9723 BV	134	devc->model = &models[0];
91b77e6b	135	sr_sw_limits_init(&devc->sw_limits);
6dcb9723 BV	136	sdi->priv = devc;
	137	if (testo_probe_channels(sdi) != SR_OK)
	138	continue;
	139	drvc->instances = g_slist_append(drvc->instances, sdi);
	140	devices = g_slist_append(devices, sdi);
	141	}
	142	libusb_free_device_list(devlist, 1);
	143	g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
0acdd793 BV	144
	145	return devices;
	146	}
	147
0acdd793 BV	148	static int dev_open(struct sr_dev_inst *sdi)
0acdd793 BV	149	{
4f840ce9	150	struct sr_dev_driver *di = sdi->driver;
41812aca	151	struct drv_context *drvc = di->context;
6dcb9723 BV	152	struct sr_usb_dev_inst *usb;
	153	libusb_device **devlist;
	154	int ret, i;
bde9fbd1	155	char connection_id[64];
6dcb9723	156
6dcb9723 BV	157	usb = sdi->conn;
	158	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
	159	for (i = 0; devlist[i]; i++) {
bde9fbd1 SA	160	usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
bde9fbd1 SA	161	if (strcmp(sdi->connection_id, connection_id))
6dcb9723 BV	162	continue;
	163	if ((ret = libusb_open(devlist[i], &usb->devhdl))) {
	164	sr_err("Failed to open device: %s.", libusb_error_name(ret));
	165	return SR_ERR;
	166	}
	167	break;
	168	}
	169	libusb_free_device_list(devlist, 1);
	170	if (!devlist[i]) {
	171	sr_err("Device not found.");
	172	return SR_ERR;
	173	}
0acdd793	174
88b1d4e5 BV	175	if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) {
	176	if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
	177	if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
	178	sr_err("Failed to detach kernel driver: %s.",
	179	libusb_error_name(ret));
	180	return SR_ERR;
	181	}
	182	}
	183	}
	184
6dcb9723 BV	185	if ((ret = libusb_claim_interface(usb->devhdl, 0))) {
	186	sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
	187	return SR_ERR;
	188	}
0acdd793 BV	189	sdi->status = SR_ST_ACTIVE;
	190
	191	return SR_OK;
	192	}
	193
	194	static int dev_close(struct sr_dev_inst *sdi)
	195	{
6dcb9723 BV	196	struct sr_usb_dev_inst *usb;
6dcb9723 BV	197
6dcb9723 BV	198	usb = sdi->conn;
	199	if (!usb->devhdl)
	200	/* Nothing to do. */
	201	return SR_OK;
0acdd793	202
6dcb9723 BV	203	libusb_release_interface(usb->devhdl, 0);
	204	libusb_close(usb->devhdl);
	205	usb->devhdl = NULL;
0acdd793 BV	206	sdi->status = SR_ST_INACTIVE;
	207
	208	return SR_OK;
	209	}
	210
584560f1	211	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
0acdd793 BV	212	const struct sr_channel_group *cg)
0acdd793 BV	213	{
91b77e6b	214	struct dev_context *devc = sdi->priv;
6dcb9723 BV	215	struct sr_usb_dev_inst *usb;
6dcb9723 BV	216	char str[128];
0acdd793	217
0acdd793 BV	218	(void)cg;
0acdd793 BV	219
0acdd793	220	switch (key) {
6dcb9723 BV	221	case SR_CONF_CONN:
	222	if (!sdi \|\| !sdi->conn)
	223	return SR_ERR_ARG;
	224	usb = sdi->conn;
	225	snprintf(str, 128, "%d.%d", usb->bus, usb->address);
	226	*data = g_variant_new_string(str);
	227	break;
91b77e6b LPC	228	case SR_CONF_LIMIT_MSEC:
	229	case SR_CONF_LIMIT_SAMPLES:
	230	return sr_sw_limits_config_get(&devc->sw_limits, key, data);
0acdd793 BV	231	default:
	232	return SR_ERR_NA;
	233	}
	234
6dcb9723	235	return SR_OK;
0acdd793 BV	236	}
0acdd793 BV	237
584560f1	238	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
0acdd793 BV	239	const struct sr_channel_group *cg)
0acdd793 BV	240	{
91b77e6b	241	struct dev_context *devc = sdi->priv;
0acdd793	242
0acdd793 BV	243	(void)cg;
	244
	245	if (sdi->status != SR_ST_ACTIVE)
	246	return SR_ERR_DEV_CLOSED;
	247
91b77e6b	248	return sr_sw_limits_config_set(&devc->sw_limits, key, data);
0acdd793 BV	249	}
0acdd793 BV	250
584560f1	251	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
0acdd793 BV	252	const struct sr_channel_group *cg)
0acdd793 BV	253	{
0acdd793	254	(void)sdi;
0acdd793 BV	255	(void)cg;
0acdd793 BV	256
0acdd793	257	switch (key) {
6dcb9723	258	case SR_CONF_SCAN_OPTIONS:
584560f1 BV	259	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	260	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
6dcb9723 BV	261	break;
6dcb9723 BV	262	case SR_CONF_DEVICE_OPTIONS:
584560f1 BV	263	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	264	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
6dcb9723	265	break;
0acdd793 BV	266	default:
	267	return SR_ERR_NA;
	268	}
	269
6dcb9723	270	return SR_OK;
0acdd793 BV	271	}
0acdd793 BV	272
6dcb9723	273	static void receive_data(struct sr_dev_inst sdi, unsigned char data, int len)
0acdd793	274	{
6dcb9723 BV	275	struct dev_context *devc;
6dcb9723 BV	276	int packet_size;
87895640	277	uint16_t crc;
6dcb9723 BV	278
	279	devc = sdi->priv;
	280
	281	if (devc->reply_size + len > MAX_REPLY_SIZE) {
	282	/* Something went very wrong. */
	283	sr_dbg("Receive buffer overrun.");
	284	devc->reply_size = 0;
	285	return;
	286	}
	287
	288	memcpy(devc->reply + devc->reply_size, data, len);
	289	devc->reply_size += len;
	290	/* Sixth byte contains the length of the packet. */
87895640 BV	291	if (devc->reply_size < 7)
	292	return;
	293
	294	packet_size = 7 + devc->reply[6] * 7 + 2;
	295	if (devc->reply_size < packet_size)
	296	return;
	297
	298	if (!testo_check_packet_prefix(devc->reply, devc->reply_size))
	299	return;
	300
	301	crc = crc16_mcrf4xx(0xffff, devc->reply, devc->reply_size - 2);
88b1d4e5	302	if (crc == RL16(&devc->reply[devc->reply_size - 2])) {
87895640	303	testo_receive_packet(sdi);
91b77e6b	304	sr_sw_limits_update_samples_read(&devc->sw_limits, 1);
87895640 BV	305	} else {
87895640 BV	306	sr_dbg("Packet has invalid CRC.");
6dcb9723 BV	307	}
6dcb9723 BV	308
87895640	309	devc->reply_size = 0;
91b77e6b	310	if (sr_sw_limits_check(&devc->sw_limits))
695dc859	311	dev_acquisition_stop(sdi);
87895640 BV	312	else
	313	testo_request_packet(sdi);
	314
6dcb9723 BV	315	}
6dcb9723 BV	316
55462b8b	317	SR_PRIV void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
6dcb9723 BV	318	{
	319	struct dev_context *devc;
	320	struct sr_dev_inst *sdi;
	321	int ret;
	322
	323	sdi = transfer->user_data;
	324	devc = sdi->priv;
	325	if (transfer == devc->out_transfer)
	326	/* Just the command acknowledgement. */
	327	return;
	328
	329	if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
	330	/* USB device was unplugged. */
695dc859	331	dev_acquisition_stop(sdi);
6dcb9723 BV	332	} else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
	333	/* First two bytes in any transfer are FTDI status bytes. */
	334	if (transfer->actual_length > 2)
	335	receive_data(sdi, transfer->buffer + 2, transfer->actual_length - 2);
	336	}
	337	/* Anything else is either an error or a timeout, which is fine:
	338	* we were just going to send another transfer request anyway. */
	339
	340	if (sdi->status == SR_ST_ACTIVE) {
	341	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	342	sr_err("Unable to resubmit transfer: %s.",
	343	libusb_error_name(ret));
	344	g_free(transfer->buffer);
	345	libusb_free_transfer(transfer);
695dc859	346	dev_acquisition_stop(sdi);
6dcb9723 BV	347	}
	348	} else {
	349	/* This was the last transfer we're going to receive, so
	350	* clean up now. */
	351	g_free(transfer->buffer);
	352	libusb_free_transfer(transfer);
	353	}
	354	}
	355
	356	static int handle_events(int fd, int revents, void *cb_data)
	357	{
4f840ce9	358	struct sr_dev_driver *di;
6dcb9723	359	struct dev_context *devc;
4f840ce9	360	struct drv_context *drvc;
6dcb9723 BV	361	struct sr_dev_inst *sdi;
6dcb9723 BV	362	struct timeval tv;
6dcb9723 BV	363
	364	(void)fd;
	365	(void)revents;
	366
	367	sdi = cb_data;
	368	devc = sdi->priv;
4f840ce9	369	di = sdi->driver;
41812aca	370	drvc = di->context;
6dcb9723	371
91b77e6b LPC	372	if (sr_sw_limits_check(&devc->sw_limits))
91b77e6b LPC	373	dev_acquisition_stop(sdi);
6dcb9723 BV	374
6dcb9723 BV	375	if (sdi->status == SR_ST_STOPPING) {
102f1239	376	usb_source_remove(sdi->session, drvc->sr_ctx);
6dcb9723	377	dev_close(sdi);
3be42bc2	378	std_session_send_df_end(sdi, LOG_PREFIX);
6dcb9723 BV	379	}
	380
	381	memset(&tv, 0, sizeof(struct timeval));
	382	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
	383	NULL);
	384
	385	return TRUE;
	386	}
	387
695dc859	388	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
6dcb9723	389	{
4f840ce9	390	struct sr_dev_driver *di = sdi->driver;
6dcb9723 BV	391	struct drv_context *drvc;
	392	struct dev_context *devc;
	393	struct sr_usb_dev_inst *usb;
	394	struct libusb_transfer *transfer;
	395	int ret;
	396	unsigned char *buf;
0acdd793	397
41812aca	398	drvc = di->context;
0acdd793 BV	399	if (sdi->status != SR_ST_ACTIVE)
	400	return SR_ERR_DEV_CLOSED;
	401
6dcb9723 BV	402
	403	devc = sdi->priv;
	404	usb = sdi->conn;
6dcb9723 BV	405	devc->reply_size = 0;
6dcb9723 BV	406
695dc859	407	std_session_send_df_header(sdi, LOG_PREFIX);
6dcb9723	408
102f1239 BV	409	usb_source_add(sdi->session, drvc->sr_ctx, 100,
102f1239 BV	410	handle_events, (void *)sdi);
6dcb9723 BV	411
	412	if (testo_set_serial_params(usb) != SR_OK)
	413	return SR_ERR;
	414
	415	devc->out_transfer = libusb_alloc_transfer(0);
	416	if (testo_request_packet(sdi) != SR_OK)
	417	return SR_ERR;
	418
a95f142e	419	buf = g_malloc(MAX_REPLY_SIZE);
6dcb9723 BV	420	transfer = libusb_alloc_transfer(0);
	421	libusb_fill_bulk_transfer(transfer, usb->devhdl, EP_IN, buf,
	422	MAX_REPLY_SIZE, receive_transfer, (void *)sdi, 100);
	423	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	424	sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
	425	libusb_free_transfer(transfer);
	426	g_free(buf);
	427	return SR_ERR;
	428	}
	429	devc->reply_size = 0;
0acdd793	430
91b77e6b LPC	431	sr_sw_limits_acquisition_start(&devc->sw_limits);
91b77e6b LPC	432
0acdd793 BV	433	return SR_OK;
	434	}
	435
695dc859	436	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
0acdd793	437	{
0acdd793 BV	438	if (sdi->status != SR_ST_ACTIVE)
	439	return SR_ERR_DEV_CLOSED;
	440
6dcb9723	441	sdi->status = SR_ST_STOPPING;
0acdd793 BV	442
	443	return SR_OK;
	444	}
	445
	446	SR_PRIV struct sr_dev_driver testo_driver_info = {
	447	.name = "testo",
	448	.longname = "Testo",
	449	.api_version = 1,
	450	.init = init,
700d6b64	451	.cleanup = std_cleanup,
0acdd793	452	.scan = scan,
c01bf34c	453	.dev_list = std_dev_list,
0acdd793 BV	454	.config_get = config_get,
	455	.config_set = config_set,
	456	.config_list = config_list,
	457	.dev_open = dev_open,
	458	.dev_close = dev_close,
	459	.dev_acquisition_start = dev_acquisition_start,
	460	.dev_acquisition_stop = dev_acquisition_stop,
41812aca	461	.context = NULL,
0acdd793	462	};