[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(di, sr_ctx, 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;
	int ret;

	usb = sdi->conn;

	ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb);
	if (ret != SR_OK)
		return ret;

	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	47	{
1f8f5bc0	48	return std_init(di, sr_ctx, LOG_PREFIX);
0acdd793 BV	49	}
0acdd793 BV	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	152	struct sr_usb_dev_inst *usb;
b75dc14a	153	int ret;
6dcb9723	154
6dcb9723	155	usb = sdi->conn;
b75dc14a LPC	156
	157	ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb);
	158	if (ret != SR_OK)
	159	return ret;
0acdd793	160
88b1d4e5 BV	161	if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) {
	162	if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
	163	if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
	164	sr_err("Failed to detach kernel driver: %s.",
	165	libusb_error_name(ret));
	166	return SR_ERR;
	167	}
	168	}
	169	}
	170
6dcb9723 BV	171	if ((ret = libusb_claim_interface(usb->devhdl, 0))) {
	172	sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
	173	return SR_ERR;
	174	}
0acdd793 BV	175	sdi->status = SR_ST_ACTIVE;
	176
	177	return SR_OK;
	178	}
	179
	180	static int dev_close(struct sr_dev_inst *sdi)
	181	{
6dcb9723 BV	182	struct sr_usb_dev_inst *usb;
6dcb9723 BV	183
6dcb9723 BV	184	usb = sdi->conn;
	185	if (!usb->devhdl)
	186	/* Nothing to do. */
	187	return SR_OK;
0acdd793	188
6dcb9723 BV	189	libusb_release_interface(usb->devhdl, 0);
	190	libusb_close(usb->devhdl);
	191	usb->devhdl = NULL;
0acdd793 BV	192	sdi->status = SR_ST_INACTIVE;
	193
	194	return SR_OK;
	195	}
	196
584560f1	197	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
0acdd793 BV	198	const struct sr_channel_group *cg)
0acdd793 BV	199	{
91b77e6b	200	struct dev_context *devc = sdi->priv;
6dcb9723 BV	201	struct sr_usb_dev_inst *usb;
6dcb9723 BV	202	char str[128];
0acdd793	203
0acdd793 BV	204	(void)cg;
0acdd793 BV	205
0acdd793	206	switch (key) {
6dcb9723 BV	207	case SR_CONF_CONN:
	208	if (!sdi \|\| !sdi->conn)
	209	return SR_ERR_ARG;
	210	usb = sdi->conn;
	211	snprintf(str, 128, "%d.%d", usb->bus, usb->address);
	212	*data = g_variant_new_string(str);
	213	break;
91b77e6b LPC	214	case SR_CONF_LIMIT_MSEC:
	215	case SR_CONF_LIMIT_SAMPLES:
	216	return sr_sw_limits_config_get(&devc->sw_limits, key, data);
0acdd793 BV	217	default:
	218	return SR_ERR_NA;
	219	}
	220
6dcb9723	221	return SR_OK;
0acdd793 BV	222	}
0acdd793 BV	223
584560f1	224	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
0acdd793 BV	225	const struct sr_channel_group *cg)
0acdd793 BV	226	{
91b77e6b	227	struct dev_context *devc = sdi->priv;
0acdd793	228
0acdd793 BV	229	(void)cg;
	230
	231	if (sdi->status != SR_ST_ACTIVE)
	232	return SR_ERR_DEV_CLOSED;
	233
91b77e6b	234	return sr_sw_limits_config_set(&devc->sw_limits, key, data);
0acdd793 BV	235	}
0acdd793 BV	236
584560f1	237	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
0acdd793 BV	238	const struct sr_channel_group *cg)
0acdd793 BV	239	{
0acdd793	240	(void)sdi;
0acdd793 BV	241	(void)cg;
0acdd793 BV	242
0acdd793	243	switch (key) {
6dcb9723	244	case SR_CONF_SCAN_OPTIONS:
584560f1 BV	245	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	246	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
6dcb9723 BV	247	break;
6dcb9723 BV	248	case SR_CONF_DEVICE_OPTIONS:
584560f1 BV	249	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	250	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
6dcb9723	251	break;
0acdd793 BV	252	default:
	253	return SR_ERR_NA;
	254	}
	255
6dcb9723	256	return SR_OK;
0acdd793 BV	257	}
0acdd793 BV	258
6dcb9723	259	static void receive_data(struct sr_dev_inst sdi, unsigned char data, int len)
0acdd793	260	{
6dcb9723 BV	261	struct dev_context *devc;
6dcb9723 BV	262	int packet_size;
87895640	263	uint16_t crc;
6dcb9723 BV	264
	265	devc = sdi->priv;
	266
	267	if (devc->reply_size + len > MAX_REPLY_SIZE) {
	268	/* Something went very wrong. */
	269	sr_dbg("Receive buffer overrun.");
	270	devc->reply_size = 0;
	271	return;
	272	}
	273
	274	memcpy(devc->reply + devc->reply_size, data, len);
	275	devc->reply_size += len;
	276	/* Sixth byte contains the length of the packet. */
87895640 BV	277	if (devc->reply_size < 7)
	278	return;
	279
	280	packet_size = 7 + devc->reply[6] * 7 + 2;
	281	if (devc->reply_size < packet_size)
	282	return;
	283
	284	if (!testo_check_packet_prefix(devc->reply, devc->reply_size))
	285	return;
	286
	287	crc = crc16_mcrf4xx(0xffff, devc->reply, devc->reply_size - 2);
88b1d4e5	288	if (crc == RL16(&devc->reply[devc->reply_size - 2])) {
87895640	289	testo_receive_packet(sdi);
91b77e6b	290	sr_sw_limits_update_samples_read(&devc->sw_limits, 1);
87895640 BV	291	} else {
87895640 BV	292	sr_dbg("Packet has invalid CRC.");
6dcb9723 BV	293	}
6dcb9723 BV	294
87895640	295	devc->reply_size = 0;
91b77e6b	296	if (sr_sw_limits_check(&devc->sw_limits))
695dc859	297	dev_acquisition_stop(sdi);
87895640 BV	298	else
	299	testo_request_packet(sdi);
	300
6dcb9723 BV	301	}
6dcb9723 BV	302
55462b8b	303	SR_PRIV void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
6dcb9723 BV	304	{
	305	struct dev_context *devc;
	306	struct sr_dev_inst *sdi;
	307	int ret;
	308
	309	sdi = transfer->user_data;
	310	devc = sdi->priv;
	311	if (transfer == devc->out_transfer)
	312	/* Just the command acknowledgement. */
	313	return;
	314
	315	if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
	316	/* USB device was unplugged. */
695dc859	317	dev_acquisition_stop(sdi);
6dcb9723 BV	318	} else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
	319	/* First two bytes in any transfer are FTDI status bytes. */
	320	if (transfer->actual_length > 2)
	321	receive_data(sdi, transfer->buffer + 2, transfer->actual_length - 2);
	322	}
	323	/* Anything else is either an error or a timeout, which is fine:
	324	* we were just going to send another transfer request anyway. */
	325
	326	if (sdi->status == SR_ST_ACTIVE) {
	327	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	328	sr_err("Unable to resubmit transfer: %s.",
	329	libusb_error_name(ret));
	330	g_free(transfer->buffer);
	331	libusb_free_transfer(transfer);
695dc859	332	dev_acquisition_stop(sdi);
6dcb9723 BV	333	}
	334	} else {
	335	/* This was the last transfer we're going to receive, so
	336	* clean up now. */
	337	g_free(transfer->buffer);
	338	libusb_free_transfer(transfer);
	339	}
	340	}
	341
	342	static int handle_events(int fd, int revents, void *cb_data)
	343	{
4f840ce9	344	struct sr_dev_driver *di;
6dcb9723	345	struct dev_context *devc;
4f840ce9	346	struct drv_context *drvc;
6dcb9723 BV	347	struct sr_dev_inst *sdi;
6dcb9723 BV	348	struct timeval tv;
6dcb9723 BV	349
	350	(void)fd;
	351	(void)revents;
	352
	353	sdi = cb_data;
	354	devc = sdi->priv;
4f840ce9	355	di = sdi->driver;
41812aca	356	drvc = di->context;
6dcb9723	357
91b77e6b LPC	358	if (sr_sw_limits_check(&devc->sw_limits))
91b77e6b LPC	359	dev_acquisition_stop(sdi);
6dcb9723 BV	360
6dcb9723 BV	361	if (sdi->status == SR_ST_STOPPING) {
102f1239	362	usb_source_remove(sdi->session, drvc->sr_ctx);
6dcb9723	363	dev_close(sdi);
3be42bc2	364	std_session_send_df_end(sdi, LOG_PREFIX);
6dcb9723 BV	365	}
	366
	367	memset(&tv, 0, sizeof(struct timeval));
	368	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
	369	NULL);
	370
	371	return TRUE;
	372	}
	373
695dc859	374	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
6dcb9723	375	{
4f840ce9	376	struct sr_dev_driver *di = sdi->driver;
6dcb9723 BV	377	struct drv_context *drvc;
	378	struct dev_context *devc;
	379	struct sr_usb_dev_inst *usb;
	380	struct libusb_transfer *transfer;
	381	int ret;
	382	unsigned char *buf;
0acdd793	383
41812aca	384	drvc = di->context;
0acdd793 BV	385	if (sdi->status != SR_ST_ACTIVE)
	386	return SR_ERR_DEV_CLOSED;
	387
6dcb9723 BV	388
	389	devc = sdi->priv;
	390	usb = sdi->conn;
6dcb9723 BV	391	devc->reply_size = 0;
6dcb9723 BV	392
695dc859	393	std_session_send_df_header(sdi, LOG_PREFIX);
6dcb9723	394
102f1239 BV	395	usb_source_add(sdi->session, drvc->sr_ctx, 100,
102f1239 BV	396	handle_events, (void *)sdi);
6dcb9723 BV	397
	398	if (testo_set_serial_params(usb) != SR_OK)
	399	return SR_ERR;
	400
	401	devc->out_transfer = libusb_alloc_transfer(0);
	402	if (testo_request_packet(sdi) != SR_OK)
	403	return SR_ERR;
	404
a95f142e	405	buf = g_malloc(MAX_REPLY_SIZE);
6dcb9723 BV	406	transfer = libusb_alloc_transfer(0);
	407	libusb_fill_bulk_transfer(transfer, usb->devhdl, EP_IN, buf,
	408	MAX_REPLY_SIZE, receive_transfer, (void *)sdi, 100);
	409	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	410	sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
	411	libusb_free_transfer(transfer);
	412	g_free(buf);
	413	return SR_ERR;
	414	}
	415	devc->reply_size = 0;
0acdd793	416
91b77e6b LPC	417	sr_sw_limits_acquisition_start(&devc->sw_limits);
91b77e6b LPC	418
0acdd793 BV	419	return SR_OK;
	420	}
	421
695dc859	422	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
0acdd793	423	{
0acdd793 BV	424	if (sdi->status != SR_ST_ACTIVE)
	425	return SR_ERR_DEV_CLOSED;
	426
6dcb9723	427	sdi->status = SR_ST_STOPPING;
0acdd793 BV	428
	429	return SR_OK;
	430	}
	431
	432	SR_PRIV struct sr_dev_driver testo_driver_info = {
	433	.name = "testo",
	434	.longname = "Testo",
	435	.api_version = 1,
	436	.init = init,
700d6b64	437	.cleanup = std_cleanup,
0acdd793	438	.scan = scan,
c01bf34c	439	.dev_list = std_dev_list,
0acdd793 BV	440	.config_get = config_get,
	441	.config_set = config_set,
	442	.config_list = config_list,
	443	.dev_open = dev_open,
	444	.dev_close = dev_close,
	445	.dev_acquisition_start = dev_acquisition_start,
	446	.dev_acquisition_stop = dev_acquisition_stop,
41812aca	447	.context = NULL,
0acdd793	448	};